+
+U_BOOT_CMD(
+ httpd, 1, 1, do_httpd,
-+ "httpd\t- start webserver\n", "\n"
++ "httpd\t- start webserver", ""
+);
+#endif
+
int do_tftpb (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
return netboot_common (TFTP, cmdtp, argc, argv);
+--- /dev/null
++++ b/include/httpd.h
+@@ -0,0 +1,17 @@
++#ifndef _UIP_HTTPD_H__
++#define _UIP_HTTPD_H__
++
++void HttpdStart (void);
++void HttpdHandler (void);
++
++/* board specific implementation */
++extern int do_http_upgrade(const unsigned char *data, const ulong size);
++
++#define HTTP_PROGRESS_START 0
++#define HTTP_PROGRESS_TIMEOUT 1
++#define HTTP_PROGRESS_UPLOAD_READY 2
++#define HTTP_PROGRESS_UGRADE_READY 3
++#define HTTP_PROGRESS_UGRADE_FAILED 4
++extern int do_http_progress(const int state);
++
++#endif
--- a/include/net.h
+++ b/include/net.h
@@ -383,7 +383,8 @@ extern int NetTimeOffset; /* offset ti
/* Shutdown adapters and cleanup */
extern void NetStop(void);
+--- a/net/Makefile
++++ b/net/Makefile
+@@ -26,6 +26,10 @@ include $(TOPDIR)/config.mk
+ # CFLAGS += -DDEBUG
+
+ LIB = $(obj)libnet.a
++UIPDIR = uip-0.9
++RSADIR = uip-0.9
++$(shell mkdir -p $(obj)$(UIPDIR))
++$(shell mkdir -p $(obj)$(RSADIR))
+
+ COBJS-$(CONFIG_CMD_NET) += bootp.o
+ COBJS-$(CONFIG_CMD_DNS) += dns.o
+@@ -36,6 +40,9 @@ COBJS-$(CONFIG_CMD_NET) += rarp.o
+ COBJS-$(CONFIG_CMD_SNTP) += sntp.o
+ COBJS-$(CONFIG_CMD_NET) += tftp.o
+
++COBJS-$(CONFIG_CMD_HTTPD) += httpd.o $(UIPDIR)/fs.o $(UIPDIR)/httpd.o $(UIPDIR)/uip_arp.o $(UIPDIR)/uip_arch.o $(UIPDIR)/uip.o
++COBJS-$(CONFIG_CMD_RSA) += $(RSADIR)/bigint.o $(RSADIR)/base64.o $(RSADIR)/rmd160.o $(RSADIR)/rsa.o
++
+ COBJS := $(COBJS-y)
+ SRCS := $(COBJS:.o=.c)
+ OBJS := $(addprefix $(obj),$(COBJS))
--- /dev/null
+++ b/net/httpd.c
@@ -0,0 +1,52 @@
+}
+
+#endif
---- /dev/null
-+++ b/include/httpd.h
-@@ -0,0 +1,17 @@
-+#ifndef _UIP_HTTPD_H__
-+#define _UIP_HTTPD_H__
-+
-+void HttpdStart (void);
-+void HttpdHandler (void);
-+
-+/* board specific implementation */
-+extern int do_http_upgrade(const unsigned char *data, const ulong size);
-+
-+#define HTTP_PROGRESS_START 0
-+#define HTTP_PROGRESS_TIMEOUT 1
-+#define HTTP_PROGRESS_UPLOAD_READY 2
-+#define HTTP_PROGRESS_UGRADE_READY 3
-+#define HTTP_PROGRESS_UGRADE_FAILED 4
-+extern int do_http_progress(const int state);
-+
-+#endif
---- a/net/Makefile
-+++ b/net/Makefile
-@@ -26,6 +26,10 @@ include $(TOPDIR)/config.mk
- # CFLAGS += -DDEBUG
-
- LIB = $(obj)libnet.a
-+UIPDIR = uip-0.9
-+RSADIR = uip-0.9
-+$(shell mkdir -p $(obj)$(UIPDIR))
-+$(shell mkdir -p $(obj)$(RSADIR))
-
- COBJS-y += bootp.o
- COBJS-$(CONFIG_CMD_DNS) += dns.o
-@@ -36,6 +40,9 @@ COBJS-y += rarp.o
- COBJS-$(CONFIG_CMD_SNTP) += sntp.o
- COBJS-y += tftp.o
-
-+COBJS-$(CONFIG_CMD_HTTPD) += httpd.o $(UIPDIR)/fs.o $(UIPDIR)/httpd.o $(UIPDIR)/uip_arp.o $(UIPDIR)/uip_arch.o $(UIPDIR)/uip.o
-+COBJS-$(CONFIG_CMD_RSA) += $(RSADIR)/bigint.o $(RSADIR)/base64.o $(RSADIR)/rmd160.o $(RSADIR)/rsa.o
-+
- COBJS := $(COBJS-y)
- SRCS := $(COBJS:.o=.c)
- OBJS := $(addprefix $(obj),$(COBJS))
--- a/net/net.c
+++ b/net/net.c
@@ -95,6 +95,19 @@
+extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+#endif
- #if defined(CONFIG_CMD_NET)
+ DECLARE_GLOBAL_DATA_PTR;
-@@ -1310,6 +1323,13 @@ NetReceive(volatile uchar * inpkt, int l
+@@ -1308,6 +1321,13 @@ NetReceive(volatile uchar * inpkt, int l
debug("packet received\n");
NetRxPacket = inpkt;
NetRxPacketLen = len;
et = (Ethernet_t *)inpkt;
-@@ -1952,3 +1972,162 @@ ushort getenv_VLAN(char *var)
+@@ -1922,3 +1942,162 @@ ushort getenv_VLAN(char *var)
{
return (string_to_VLAN(getenv(var)));
}
+
+#endif
--- /dev/null
++++ b/net/rsa/Makefile
+@@ -0,0 +1,31 @@
++#
++# FONRSA & FONSIGN libraries unit testing
++#
++# This file is part of FONUCS. Copyright (C) 2007 FON Wireless Ltd.
++#
++# Execute in this directory
++#
++# Created: 20070422 Pablo Martin Medrano <pablo@fon.com>
++#
++# $Id: Makefile 389 2007-06-11 08:29:56Z pablo.martin $
++#
++# FIXME: Put this in the main Makefile.am
++#
++all: fonsign dump_key
++
++fonsign:
++ gcc -g sign_openssl.c -D__MAINTEST__ -o fonsign -lssl
++
++dump_key:
++ gcc -o dump_key dump_key.c
++ ./dump_key > public_key.h
++
++foncheckrsa:
++ gcc -g bigint.c fonrsa.c rmd160.c foncheckrsa.c base64.c log.c -o foncheckrsa
++
++#private_fon_rsa_key.pem:
++# openssl genrsa -out private_fon_rsa_key.pem 4096
++# openssl rsa -in private_fon_rsa_key.pem -pubout -out public_fon_rsa_key.pem
++
++clean:
++ rm fonsign dump_key
+--- /dev/null
+++ b/net/rsa/base64.c
@@ -0,0 +1,137 @@
+#include "base64.h"
+#endif
+
--- /dev/null
-+++ b/net/rsa/Makefile
-@@ -0,0 +1,31 @@
-+#
-+# FONRSA & FONSIGN libraries unit testing
-+#
-+# This file is part of FONUCS. Copyright (C) 2007 FON Wireless Ltd.
-+#
-+# Execute in this directory
-+#
-+# Created: 20070422 Pablo Martin Medrano <pablo@fon.com>
-+#
-+# $Id: Makefile 389 2007-06-11 08:29:56Z pablo.martin $
-+#
-+# FIXME: Put this in the main Makefile.am
-+#
-+all: fonsign dump_key
-+
-+fonsign:
-+ gcc -g sign_openssl.c -D__MAINTEST__ -o fonsign -lssl
-+
-+dump_key:
-+ gcc -o dump_key dump_key.c
-+ ./dump_key > public_key.h
-+
-+foncheckrsa:
-+ gcc -g bigint.c fonrsa.c rmd160.c foncheckrsa.c base64.c log.c -o foncheckrsa
-+
-+#private_fon_rsa_key.pem:
-+# openssl genrsa -out private_fon_rsa_key.pem 4096
-+# openssl rsa -in private_fon_rsa_key.pem -pubout -out public_fon_rsa_key.pem
-+
-+clean:
-+ rm fonsign dump_key
---- /dev/null
+++ b/net/rsa/public_key.h
@@ -0,0 +1,52 @@
+unsigned char public_key[] = {
+#endif
+
--- /dev/null
++++ b/net/uip-0.9/Makefile
+@@ -0,0 +1,54 @@
++# Copyright (c) 2001, Adam Dunkels.
++# All rights reserved.
++#
++# Redistribution and use in source and binary forms, with or without
++# modification, are permitted provided that the following conditions
++# are met:
++# 1. Redistributions of source code must retain the above copyright
++# notice, this list of conditions and the following disclaimer.
++# 2. Redistributions in binary form must reproduce the above copyright
++# notice, this list of conditions and the following disclaimer in the
++# documentation and/or other materials provided with the distribution.
++# 3. All advertising materials mentioning features or use of this software
++# must display the following acknowledgement:
++# This product includes software developed by Adam Dunkels.
++# 4. The name of the author may not be used to endorse or promote
++# products derived from this software without specific prior
++# written permission.
++#
++# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
++# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
++# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
++# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
++# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
++# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++#
++# This file is part of the uIP TCP/IP stack.
++#
++# $Id: Makefile,v 1.8.2.2 2003/10/04 22:54:17 adam Exp $
++#
++
++CC=gcc
++CFLAGS=-Wall -fpack-struct -DDUMP=0
++
++all: uip
++
++uip: uip.o uip_arch.o tapdev.o httpd.o main.o fs.o uip_arp.o
++ $(CC) $(CFLAGS) $(LDFLAGS) $^ -o $@
++
++%.o: %.c
++ $(CC) $(CFLAGS) -c $^ -o $@
++
++clean:
++ rm -f *.o *~ *core uip
++
++
++
++
++
++
+--- /dev/null
+++ b/net/uip-0.9/fs.c
@@ -0,0 +1,154 @@
+/**
+#endif /* FS_STATISTICS */
+/*-----------------------------------------------------------------------------------*/
--- /dev/null
-+++ b/net/uip-0.9/fsdata.c
-@@ -0,0 +1,199 @@
-+static const char data_flashing_html[] = {
-+ /* /flashing.html */
-+ 0x2f, 0x66, 0x6c, 0x61, 0x73, 0x68, 0x69, 0x6e, 0x67, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0,
-+ 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0x20, 0x32,
-+ 0x30, 0x30, 0x20, 0x4f, 0x4b, 0xd, 0xa, 0x53, 0x65, 0x72,
-+ 0x76, 0x65, 0x72, 0x3a, 0x20, 0x75, 0x49, 0x50, 0x2f, 0x30,
-+ 0x2e, 0x39, 0x20, 0x28, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f,
-+ 0x2f, 0x64, 0x75, 0x6e, 0x6b, 0x65, 0x6c, 0x73, 0x2e, 0x63,
-+ 0x6f, 0x6d, 0x2f, 0x61, 0x64, 0x61, 0x6d, 0x2f, 0x75, 0x69,
-+ 0x70, 0x2f, 0x29, 0xd, 0xa, 0x43, 0x6f, 0x6e, 0x74, 0x65,
-+ 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74,
-+ 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0xd, 0xa,
-+ 0xd, 0xa, 0x3c, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0x3c, 0x62,
-+ 0x6f, 0x64, 0x79, 0x20, 0x73, 0x74, 0x79, 0x6c, 0x65, 0x3d,
-+ 0x22, 0x6d, 0x61, 0x72, 0x67, 0x69, 0x6e, 0x3a, 0x20, 0x30,
-+ 0x70, 0x74, 0x20, 0x61, 0x75, 0x74, 0x6f, 0x3b, 0x20, 0x68,
-+ 0x65, 0x69, 0x67, 0x68, 0x74, 0x3a, 0x31, 0x30, 0x30, 0x25,
-+ 0x3b, 0x20, 0x63, 0x6f, 0x6c, 0x6f, 0x72, 0x3a, 0x20, 0x23,
-+ 0x66, 0x66, 0x66, 0x3b, 0x20, 0x62, 0x61, 0x63, 0x6b, 0x67,
-+ 0x72, 0x6f, 0x75, 0x6e, 0x64, 0x2d, 0x63, 0x6f, 0x6c, 0x6f,
-+ 0x72, 0x3a, 0x20, 0x23, 0x66, 0x62, 0x62, 0x30, 0x33, 0x34,
-+ 0x3b, 0x22, 0x3e, 0x3c, 0x63, 0x65, 0x6e, 0x74, 0x65, 0x72,
-+ 0x3e, 0x3c, 0x68, 0x31, 0x3e, 0x55, 0x70, 0x67, 0x72, 0x61,
-+ 0x64, 0x69, 0x6e, 0x67, 0x20, 0x73, 0x79, 0x73, 0x74, 0x65,
-+ 0x6d, 0x20, 0x2e, 0x2e, 0x2e, 0x2e, 0x3c, 0x2f, 0x68, 0x31,
-+ 0x3e, 0x3c, 0x2f, 0x63, 0x65, 0x6e, 0x74, 0x65, 0x72, 0x3e,
-+ 0x3c, 0x2f, 0x62, 0x6f, 0x64, 0x79, 0x3e, 0x3c, 0x2f, 0x68,
-+ 0x74, 0x6d, 0x6c, 0x3e, 0xa, };
++++ b/net/uip-0.9/fs.h
+@@ -0,0 +1,80 @@
++/**
++ * \addtogroup httpd
++ * @{
++ */
+
-+static const char data_fail_html[] = {
-+ /* /fail.html */
-+ 0x2f, 0x66, 0x61, 0x69, 0x6c, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0,
-+ 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0x20, 0x32,
-+ 0x30, 0x30, 0x20, 0x4f, 0x4b, 0xd, 0xa, 0x53, 0x65, 0x72,
-+ 0x76, 0x65, 0x72, 0x3a, 0x20, 0x75, 0x49, 0x50, 0x2f, 0x30,
-+ 0x2e, 0x39, 0x20, 0x28, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f,
-+ 0x2f, 0x64, 0x75, 0x6e, 0x6b, 0x65, 0x6c, 0x73, 0x2e, 0x63,
-+ 0x6f, 0x6d, 0x2f, 0x61, 0x64, 0x61, 0x6d, 0x2f, 0x75, 0x69,
-+ 0x70, 0x2f, 0x29, 0xd, 0xa, 0x43, 0x6f, 0x6e, 0x74, 0x65,
-+ 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74,
-+ 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0xd, 0xa,
-+ 0xd, 0xa, 0x3c, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0xa, 0x9,
-+ 0x3c, 0x68, 0x65, 0x61, 0x64, 0x3e, 0xa, 0x9, 0x9, 0x3c,
-+ 0x74, 0x69, 0x74, 0x6c, 0x65, 0x3e, 0xa, 0x9, 0x9, 0x9,
++/**
++ * \file
++ * HTTP server read-only file system header file.
++ * \author Adam Dunkels <adam@dunkels.com>
++ */
++
++/*
++ * Copyright (c) 2001, Swedish Institute of Computer Science.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. Neither the name of the Institute nor the names of its contributors
++ * may be used to endorse or promote products derived from this software
++ * without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ *
++ * This file is part of the lwIP TCP/IP stack.
++ *
++ * Author: Adam Dunkels <adam@sics.se>
++ *
++ * $Id: fs.h,v 1.6.2.3 2003/10/07 13:22:27 adam Exp $
++ */
++#ifndef __FS_H__
++#define __FS_H__
++
++#include "uip.h"
++
++/**
++ * An open file in the read-only file system.
++ */
++struct fs_file {
++ char *data; /**< The actual file data. */
++ int len; /**< The length of the file data. */
++};
++
++/**
++ * Open a file in the read-only file system.
++ *
++ * \param name The name of the file.
++ *
++ * \param file The file pointer, which must be allocated by caller and
++ * will be filled in by the function.
++ */
++int fs_open(const char *name, struct fs_file *file);
++
++#ifdef FS_STATISTICS
++#if FS_STATISTICS == 1
++u16_t fs_count(char *name);
++#endif /* FS_STATISTICS */
++#endif /* FS_STATISTICS */
++
++/**
++ * Initialize the read-only file system.
++ */
++void fs_init(void);
++
++#endif /* __FS_H__ */
+--- /dev/null
++++ b/net/uip-0.9/fsdata.c
+@@ -0,0 +1,199 @@
++static const char data_flashing_html[] = {
++ /* /flashing.html */
++ 0x2f, 0x66, 0x6c, 0x61, 0x73, 0x68, 0x69, 0x6e, 0x67, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0,
++ 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0x20, 0x32,
++ 0x30, 0x30, 0x20, 0x4f, 0x4b, 0xd, 0xa, 0x53, 0x65, 0x72,
++ 0x76, 0x65, 0x72, 0x3a, 0x20, 0x75, 0x49, 0x50, 0x2f, 0x30,
++ 0x2e, 0x39, 0x20, 0x28, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f,
++ 0x2f, 0x64, 0x75, 0x6e, 0x6b, 0x65, 0x6c, 0x73, 0x2e, 0x63,
++ 0x6f, 0x6d, 0x2f, 0x61, 0x64, 0x61, 0x6d, 0x2f, 0x75, 0x69,
++ 0x70, 0x2f, 0x29, 0xd, 0xa, 0x43, 0x6f, 0x6e, 0x74, 0x65,
++ 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74,
++ 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0xd, 0xa,
++ 0xd, 0xa, 0x3c, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0x3c, 0x62,
++ 0x6f, 0x64, 0x79, 0x20, 0x73, 0x74, 0x79, 0x6c, 0x65, 0x3d,
++ 0x22, 0x6d, 0x61, 0x72, 0x67, 0x69, 0x6e, 0x3a, 0x20, 0x30,
++ 0x70, 0x74, 0x20, 0x61, 0x75, 0x74, 0x6f, 0x3b, 0x20, 0x68,
++ 0x65, 0x69, 0x67, 0x68, 0x74, 0x3a, 0x31, 0x30, 0x30, 0x25,
++ 0x3b, 0x20, 0x63, 0x6f, 0x6c, 0x6f, 0x72, 0x3a, 0x20, 0x23,
++ 0x66, 0x66, 0x66, 0x3b, 0x20, 0x62, 0x61, 0x63, 0x6b, 0x67,
++ 0x72, 0x6f, 0x75, 0x6e, 0x64, 0x2d, 0x63, 0x6f, 0x6c, 0x6f,
++ 0x72, 0x3a, 0x20, 0x23, 0x66, 0x62, 0x62, 0x30, 0x33, 0x34,
++ 0x3b, 0x22, 0x3e, 0x3c, 0x63, 0x65, 0x6e, 0x74, 0x65, 0x72,
++ 0x3e, 0x3c, 0x68, 0x31, 0x3e, 0x55, 0x70, 0x67, 0x72, 0x61,
++ 0x64, 0x69, 0x6e, 0x67, 0x20, 0x73, 0x79, 0x73, 0x74, 0x65,
++ 0x6d, 0x20, 0x2e, 0x2e, 0x2e, 0x2e, 0x3c, 0x2f, 0x68, 0x31,
++ 0x3e, 0x3c, 0x2f, 0x63, 0x65, 0x6e, 0x74, 0x65, 0x72, 0x3e,
++ 0x3c, 0x2f, 0x62, 0x6f, 0x64, 0x79, 0x3e, 0x3c, 0x2f, 0x68,
++ 0x74, 0x6d, 0x6c, 0x3e, 0xa, };
++
++static const char data_fail_html[] = {
++ /* /fail.html */
++ 0x2f, 0x66, 0x61, 0x69, 0x6c, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0,
++ 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0x20, 0x32,
++ 0x30, 0x30, 0x20, 0x4f, 0x4b, 0xd, 0xa, 0x53, 0x65, 0x72,
++ 0x76, 0x65, 0x72, 0x3a, 0x20, 0x75, 0x49, 0x50, 0x2f, 0x30,
++ 0x2e, 0x39, 0x20, 0x28, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f,
++ 0x2f, 0x64, 0x75, 0x6e, 0x6b, 0x65, 0x6c, 0x73, 0x2e, 0x63,
++ 0x6f, 0x6d, 0x2f, 0x61, 0x64, 0x61, 0x6d, 0x2f, 0x75, 0x69,
++ 0x70, 0x2f, 0x29, 0xd, 0xa, 0x43, 0x6f, 0x6e, 0x74, 0x65,
++ 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74,
++ 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0xd, 0xa,
++ 0xd, 0xa, 0x3c, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0xa, 0x9,
++ 0x3c, 0x68, 0x65, 0x61, 0x64, 0x3e, 0xa, 0x9, 0x9, 0x3c,
++ 0x74, 0x69, 0x74, 0x6c, 0x65, 0x3e, 0xa, 0x9, 0x9, 0x9,
+ 0x4c, 0x61, 0x46, 0x6f, 0x6e, 0x65, 0x72, 0x61, 0x20, 0x46,
+ 0x61, 0x69, 0x6c, 0x73, 0x61, 0x66, 0x65, 0x20, 0x55, 0x49,
+ 0xa, 0x9, 0x9, 0x3c, 0x2f, 0x74, 0x69, 0x74, 0x6c, 0x65,
+
+#endif /* __FSDATA_H__ */
--- /dev/null
-+++ b/net/uip-0.9/fs.h
-@@ -0,0 +1,80 @@
-+/**
-+ * \addtogroup httpd
-+ * @{
-+ */
-+
-+/**
-+ * \file
-+ * HTTP server read-only file system header file.
-+ * \author Adam Dunkels <adam@dunkels.com>
-+ */
-+
-+/*
-+ * Copyright (c) 2001, Swedish Institute of Computer Science.
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. Neither the name of the Institute nor the names of its contributors
-+ * may be used to endorse or promote products derived from this software
-+ * without specific prior written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
-+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
-+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-+ * SUCH DAMAGE.
-+ *
-+ * This file is part of the lwIP TCP/IP stack.
-+ *
-+ * Author: Adam Dunkels <adam@sics.se>
-+ *
-+ * $Id: fs.h,v 1.6.2.3 2003/10/07 13:22:27 adam Exp $
-+ */
-+#ifndef __FS_H__
-+#define __FS_H__
-+
-+#include "uip.h"
-+
-+/**
-+ * An open file in the read-only file system.
-+ */
-+struct fs_file {
-+ char *data; /**< The actual file data. */
-+ int len; /**< The length of the file data. */
-+};
-+
-+/**
-+ * Open a file in the read-only file system.
-+ *
-+ * \param name The name of the file.
-+ *
-+ * \param file The file pointer, which must be allocated by caller and
-+ * will be filled in by the function.
-+ */
-+int fs_open(const char *name, struct fs_file *file);
-+
-+#ifdef FS_STATISTICS
-+#if FS_STATISTICS == 1
-+u16_t fs_count(char *name);
-+#endif /* FS_STATISTICS */
-+#endif /* FS_STATISTICS */
-+
-+/**
-+ * Initialize the read-only file system.
-+ */
-+void fs_init(void);
-+
-+#endif /* __FS_H__ */
---- /dev/null
+++ b/net/uip-0.9/httpd.c
@@ -0,0 +1,278 @@
+#include "uip.h"
+ return 0;
+}
--- /dev/null
-+++ b/net/uip-0.9/Makefile
-@@ -0,0 +1,54 @@
-+# Copyright (c) 2001, Adam Dunkels.
-+# All rights reserved.
-+#
-+# Redistribution and use in source and binary forms, with or without
-+# modification, are permitted provided that the following conditions
-+# are met:
-+# 1. Redistributions of source code must retain the above copyright
-+# notice, this list of conditions and the following disclaimer.
-+# 2. Redistributions in binary form must reproduce the above copyright
-+# notice, this list of conditions and the following disclaimer in the
-+# documentation and/or other materials provided with the distribution.
-+# 3. All advertising materials mentioning features or use of this software
-+# must display the following acknowledgement:
-+# This product includes software developed by Adam Dunkels.
-+# 4. The name of the author may not be used to endorse or promote
-+# products derived from this software without specific prior
-+# written permission.
-+#
-+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
-+# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-+# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+#
-+# This file is part of the uIP TCP/IP stack.
-+#
-+# $Id: Makefile,v 1.8.2.2 2003/10/04 22:54:17 adam Exp $
-+#
-+
-+CC=gcc
-+CFLAGS=-Wall -fpack-struct -DDUMP=0
-+
-+all: uip
-+
-+uip: uip.o uip_arch.o tapdev.o httpd.o main.o fs.o uip_arp.o
-+ $(CC) $(CFLAGS) $(LDFLAGS) $^ -o $@
-+
-+%.o: %.c
-+ $(CC) $(CFLAGS) -c $^ -o $@
-+
-+clean:
-+ rm -f *.o *~ *core uip
-+
-+
-+
-+
-+
-+
---- /dev/null
+++ b/net/uip-0.9/tapdev.c
@@ -0,0 +1,192 @@
+/*
+
+#endif /* __TAPDEV_H__ */
--- /dev/null
-+++ b/net/uip-0.9/uip_arch.c
-@@ -0,0 +1,145 @@
++++ b/net/uip-0.9/uip.c
+@@ -0,0 +1,1503 @@
++/**
++ * \addtogroup uip
++ * @{
++ */
++
++/**
++ * \file
++ * The uIP TCP/IP stack code.
++ * \author Adam Dunkels <adam@dunkels.com>
++ */
++
+/*
-+ * Copyright (c) 2001, Adam Dunkels.
++ * Copyright (c) 2001-2003, Adam Dunkels.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ *
+ * This file is part of the uIP TCP/IP stack.
+ *
-+ * $Id: uip_arch.c,v 1.2.2.1 2003/10/04 22:54:17 adam Exp $
++ * $Id: uip.c,v 1.62.2.10 2003/10/07 13:23:01 adam Exp $
+ *
+ */
+
++/*
++This is a small implementation of the IP and TCP protocols (as well as
++some basic ICMP stuff). The implementation couples the IP, TCP and the
++application layers very tightly. To keep the size of the compiled code
++down, this code also features heavy usage of the goto statement.
++
++The principle is that we have a small buffer, called the uip_buf, in
++which the device driver puts an incoming packet. The TCP/IP stack
++parses the headers in the packet, and calls upon the application. If
++the remote host has sent data to the application, this data is present
++in the uip_buf and the application read the data from there. It is up
++to the application to put this data into a byte stream if needed. The
++application will not be fed with data that is out of sequence.
++
++If the application whishes to send data to the peer, it should put its
++data into the uip_buf, 40 bytes from the start of the buffer. The
++TCP/IP stack will calculate the checksums, and fill in the necessary
++header fields and finally send the packet back to the peer.
++*/
+
+#include "uip.h"
++#include "uipopt.h"
+#include "uip_arch.h"
+
++/*-----------------------------------------------------------------------------------*/
++/* Variable definitions. */
++
++
++/* The IP address of this host. If it is defined to be fixed (by setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set here. Otherwise, the address */
++#if UIP_FIXEDADDR > 0
++const unsigned short int uip_hostaddr[2] =
++ {HTONS((UIP_IPADDR0 << 8) | UIP_IPADDR1),
++ HTONS((UIP_IPADDR2 << 8) | UIP_IPADDR3)};
++const unsigned short int uip_arp_draddr[2] =
++ {HTONS((UIP_DRIPADDR0 << 8) | UIP_DRIPADDR1),
++ HTONS((UIP_DRIPADDR2 << 8) | UIP_DRIPADDR3)};
++const unsigned short int uip_arp_netmask[2] =
++ {HTONS((UIP_NETMASK0 << 8) | UIP_NETMASK1),
++ HTONS((UIP_NETMASK2 << 8) | UIP_NETMASK3)};
++#else
++unsigned short int uip_hostaddr[2];
++unsigned short int uip_arp_draddr[2], uip_arp_netmask[2];
++#endif /* UIP_FIXEDADDR */
++
++u8_t uip_buf[UIP_BUFSIZE+2]; /* The packet buffer that contains
++ incoming packets. */
++volatile u8_t *uip_appdata; /* The uip_appdata pointer points to
++ application data. */
++volatile u8_t *uip_sappdata; /* The uip_appdata pointer points to the
++ application data which is to be sent. */
++#if UIP_URGDATA > 0
++volatile u8_t *uip_urgdata; /* The uip_urgdata pointer points to
++ urgent data (out-of-band data), if
++ present. */
++volatile u8_t uip_urglen, uip_surglen;
++#endif /* UIP_URGDATA > 0 */
++
++volatile unsigned short int uip_len, uip_slen;
++ /* The uip_len is either 8 or 16 bits,
++ depending on the maximum packet
++ size. */
++
++volatile u8_t uip_flags; /* The uip_flags variable is used for
++ communication between the TCP/IP stack
++ and the application program. */
++struct uip_conn *uip_conn; /* uip_conn always points to the current
++ connection. */
++
++struct uip_conn uip_conns[UIP_CONNS];
++ /* The uip_conns array holds all TCP
++ connections. */
++unsigned short int uip_listenports[UIP_LISTENPORTS];
++ /* The uip_listenports list all currently
++ listning ports. */
++#if UIP_UDP
++struct uip_udp_conn *uip_udp_conn;
++struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
++#endif /* UIP_UDP */
++
++
++static unsigned short int ipid; /* Ths ipid variable is an increasing
++ number that is used for the IP ID
++ field. */
++
++static u8_t iss[4]; /* The iss variable is used for the TCP
++ initial sequence number. */
++
++#if UIP_ACTIVE_OPEN
++static unsigned short int lastport; /* Keeps track of the last port used for
++ a new connection. */
++#endif /* UIP_ACTIVE_OPEN */
++
++/* Temporary variables. */
++volatile u8_t uip_acc32[4];
++static u8_t c, opt;
++static unsigned short int tmp16;
++
++/* Structures and definitions. */
++#define TCP_FIN 0x01
++#define TCP_SYN 0x02
++#define TCP_RST 0x04
++#define TCP_PSH 0x08
++#define TCP_ACK 0x10
++#define TCP_URG 0x20
++#define TCP_CTL 0x3f
++
++#define ICMP_ECHO_REPLY 0
++#define ICMP_ECHO 8
++
++/* Macros. */
+#define BUF ((uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
-+#define IP_PROTO_TCP 6
++#define FBUF ((uip_tcpip_hdr *)&uip_reassbuf[0])
++#define ICMPBUF ((uip_icmpip_hdr *)&uip_buf[UIP_LLH_LEN])
++#define UDPBUF ((uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])
++
++#if UIP_STATISTICS == 1
++struct uip_stats uip_stat;
++#define UIP_STAT(s) s
++#else
++#define UIP_STAT(s)
++#endif /* UIP_STATISTICS == 1 */
++
++#if UIP_LOGGING == 1
++extern void puts(const char *s);
++#define UIP_LOG(m) puts(m)
++#else
++#define UIP_LOG(m)
++#endif /* UIP_LOGGING == 1 */
+
+/*-----------------------------------------------------------------------------------*/
+void
-+uip_add32(u8_t *op32, u16_t op16)
++uip_init(void)
+{
-+
-+ uip_acc32[3] = op32[3] + (op16 & 0xff);
-+ uip_acc32[2] = op32[2] + (op16 >> 8);
-+ uip_acc32[1] = op32[1];
-+ uip_acc32[0] = op32[0];
-+
-+ if(uip_acc32[2] < (op16 >> 8)) {
-+ ++uip_acc32[1];
-+ if(uip_acc32[1] == 0) {
-+ ++uip_acc32[0];
-+ }
++ for(c = 0; c < UIP_LISTENPORTS; ++c) {
++ uip_listenports[c] = 0;
+ }
-+
-+
-+ if(uip_acc32[3] < (op16 & 0xff)) {
-+ ++uip_acc32[2];
-+ if(uip_acc32[2] == 0) {
-+ ++uip_acc32[1];
-+ if(uip_acc32[1] == 0) {
-+ ++uip_acc32[0];
-+ }
-+ }
++ for(c = 0; c < UIP_CONNS; ++c) {
++ uip_conns[c].tcpstateflags = CLOSED;
+ }
++#if UIP_ACTIVE_OPEN
++ lastport = 1024;
++#endif /* UIP_ACTIVE_OPEN */
++
++#if UIP_UDP
++ for(c = 0; c < UIP_UDP_CONNS; ++c) {
++ uip_udp_conns[c].lport = 0;
++ }
++#endif /* UIP_UDP */
++
++
++ /* IPv4 initialization. */
++#if UIP_FIXEDADDR == 0
++ uip_hostaddr[0] = uip_hostaddr[1] = 0;
++#endif /* UIP_FIXEDADDR */
++
+}
+/*-----------------------------------------------------------------------------------*/
-+u16_t
-+uip_chksum(u16_t *sdata, u16_t len)
++#if UIP_ACTIVE_OPEN
++struct uip_conn *
++uip_connect(unsigned short int *ripaddr, unsigned short int rport)
+{
-+ u16_t acc;
++ register struct uip_conn *conn, *cconn;
+
-+ for(acc = 0; len > 1; len -= 2) {
-+ acc += *sdata;
-+ if(acc < *sdata) {
-+ /* Overflow, so we add the carry to acc (i.e., increase by
-+ one). */
-+ ++acc;
-+ }
-+ ++sdata;
++ /* Find an unused local port. */
++ again:
++ ++lastport;
++
++ if(lastport >= 32000) {
++ lastport = 4096;
+ }
+
-+ /* add up any odd byte */
-+ if(len == 1) {
-+ acc += htons(((u16_t)(*(u8_t *)sdata)) << 8);
-+ if(acc < htons(((u16_t)(*(u8_t *)sdata)) << 8)) {
-+ ++acc;
++ /* Check if this port is already in use, and if so try to find
++ another one. */
++ for(c = 0; c < UIP_CONNS; ++c) {
++ conn = &uip_conns[c];
++ if(conn->tcpstateflags != CLOSED &&
++ conn->lport == htons(lastport)) {
++ goto again;
+ }
+ }
+
-+ return acc;
-+}
-+/*-----------------------------------------------------------------------------------*/
-+u16_t
-+uip_ipchksum(void)
-+{
-+ return uip_chksum((u16_t *)&uip_buf[UIP_LLH_LEN], 20);
-+}
-+/*-----------------------------------------------------------------------------------*/
-+u16_t
-+uip_tcpchksum(void)
-+{
-+ u16_t hsum, sum;
+
-+
-+ /* Compute the checksum of the TCP header. */
-+ hsum = uip_chksum((u16_t *)&uip_buf[20 + UIP_LLH_LEN], 20);
++ conn = 0;
++ for(c = 0; c < UIP_CONNS; ++c) {
++ cconn = &uip_conns[c];
++ if(cconn->tcpstateflags == CLOSED) {
++ conn = cconn;
++ break;
++ }
++ if(cconn->tcpstateflags == TIME_WAIT) {
++ if(conn == 0 ||
++ cconn->timer > uip_conn->timer) {
++ conn = cconn;
++ }
++ }
++ }
+
-+ /* Compute the checksum of the data in the TCP packet and add it to
-+ the TCP header checksum. */
-+ sum = uip_chksum((u16_t *)uip_appdata,
-+ (u16_t)(((((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - 40)));
-+
-+ if((sum += hsum) < hsum) {
-+ ++sum;
++ if(conn == 0) {
++ return 0;
+ }
+
-+ if((sum += BUF->srcipaddr[0]) < BUF->srcipaddr[0]) {
-+ ++sum;
-+ }
-+ if((sum += BUF->srcipaddr[1]) < BUF->srcipaddr[1]) {
-+ ++sum;
-+ }
-+ if((sum += BUF->destipaddr[0]) < BUF->destipaddr[0]) {
-+ ++sum;
++ conn->tcpstateflags = SYN_SENT;
++
++ conn->snd_nxt[0] = iss[0];
++ conn->snd_nxt[1] = iss[1];
++ conn->snd_nxt[2] = iss[2];
++ conn->snd_nxt[3] = iss[3];
++
++ conn->initialmss = conn->mss = UIP_TCP_MSS;
++
++ conn->len = 1; /* TCP length of the SYN is one. */
++ conn->nrtx = 0;
++ conn->timer = 1; /* Send the SYN next time around. */
++ conn->rto = UIP_RTO;
++ conn->sa = 0;
++ conn->sv = 16;
++ conn->lport = htons(lastport);
++ conn->rport = rport;
++ conn->ripaddr[0] = ripaddr[0];
++ conn->ripaddr[1] = ripaddr[1];
++
++ return conn;
++}
++#endif /* UIP_ACTIVE_OPEN */
++/*-----------------------------------------------------------------------------------*/
++#if UIP_UDP
++struct uip_udp_conn *
++uip_udp_new(unsigned short int *ripaddr, unsigned short int rport)
++{
++ register struct uip_udp_conn *conn;
++
++ /* Find an unused local port. */
++ again:
++ ++lastport;
++
++ if(lastport >= 32000) {
++ lastport = 4096;
+ }
-+ if((sum += BUF->destipaddr[1]) < BUF->destipaddr[1]) {
-+ ++sum;
++
++ for(c = 0; c < UIP_UDP_CONNS; ++c) {
++ if(uip_udp_conns[c].lport == lastport) {
++ goto again;
++ }
+ }
-+ if((sum += (u16_t)htons((u16_t)IP_PROTO_TCP)) < (u16_t)htons((u16_t)IP_PROTO_TCP)) {
-+ ++sum;
++
++
++ conn = 0;
++ for(c = 0; c < UIP_UDP_CONNS; ++c) {
++ if(uip_udp_conns[c].lport == 0) {
++ conn = &uip_udp_conns[c];
++ break;
++ }
+ }
+
-+ hsum = (u16_t)htons((((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - 20);
-+
-+ if((sum += hsum) < hsum) {
-+ ++sum;
++ if(conn == 0) {
++ return 0;
+ }
+
-+ return sum;
++ conn->lport = HTONS(lastport);
++ conn->rport = HTONS(rport);
++ conn->ripaddr[0] = ripaddr[0];
++ conn->ripaddr[1] = ripaddr[1];
++
++ return conn;
+}
++#endif /* UIP_UDP */
+/*-----------------------------------------------------------------------------------*/
---- /dev/null
-+++ b/net/uip-0.9/uip_arch.h
-@@ -0,0 +1,130 @@
-+/**
-+ * \defgroup uiparch Architecture specific uIP functions
-+ * @{
-+ *
-+ * The functions in the architecture specific module implement the IP
-+ * check sum and 32-bit additions.
-+ *
-+ * The IP checksum calculation is the most computationally expensive
-+ * operation in the TCP/IP stack and it therefore pays off to
-+ * implement this in efficient assembler. The purpose of the uip-arch
-+ * module is to let the checksum functions to be implemented in
-+ * architecture specific assembler.
-+ *
-+ */
-+
-+/**
-+ * \file
-+ * Declarations of architecture specific functions.
-+ * \author Adam Dunkels <adam@dunkels.com>
-+ */
++void
++uip_unlisten(unsigned short int port)
++{
++ for(c = 0; c < UIP_LISTENPORTS; ++c) {
++ if(uip_listenports[c] == port) {
++ uip_listenports[c] = 0;
++ return;
++ }
++ }
++}
++/*-----------------------------------------------------------------------------------*/
++void
++uip_listen(unsigned short int port)
++{
++ for(c = 0; c < UIP_LISTENPORTS; ++c) {
++ if(uip_listenports[c] == 0) {
++ uip_listenports[c] = port;
++ return;
++ }
++ }
++}
++/*-----------------------------------------------------------------------------------*/
++/* XXX: IP fragment reassembly: not well-tested. */
+
-+/*
-+ * Copyright (c) 2001, Adam Dunkels.
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The name of the author may not be used to endorse or promote
-+ * products derived from this software without specific prior
-+ * written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
-+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ *
-+ * This file is part of the uIP TCP/IP stack.
-+ *
-+ * $Id: uip_arch.h,v 1.1.2.2 2003/10/06 15:10:22 adam Exp $
-+ *
-+ */
++#if UIP_REASSEMBLY
++#define UIP_REASS_BUFSIZE (UIP_BUFSIZE - UIP_LLH_LEN)
++static u8_t uip_reassbuf[UIP_REASS_BUFSIZE];
++static u8_t uip_reassbitmap[UIP_REASS_BUFSIZE / (8 * 8)];
++static const u8_t bitmap_bits[8] = {0xff, 0x7f, 0x3f, 0x1f,
++ 0x0f, 0x07, 0x03, 0x01};
++static unsigned short int uip_reasslen;
++static u8_t uip_reassflags;
++#define UIP_REASS_FLAG_LASTFRAG 0x01
++static u8_t uip_reasstmr;
+
-+#ifndef __UIP_ARCH_H__
-+#define __UIP_ARCH_H__
++#define IP_HLEN 20
++#define IP_MF 0x20
+
-+#include "uip.h"
++static u8_t
++uip_reass(void)
++{
++ unsigned short int offset, len;
++ unsigned short int i;
+
-+/**
-+ * Carry out a 32-bit addition.
-+ *
-+ * Because not all architectures for which uIP is intended has native
-+ * 32-bit arithmetic, uIP uses an external C function for doing the
-+ * required 32-bit additions in the TCP protocol processing. This
-+ * function should add the two arguments and place the result in the
-+ * global variable uip_acc32.
-+ *
-+ * \note The 32-bit integer pointed to by the op32 parameter and the
-+ * result in the uip_acc32 variable are in network byte order (big
-+ * endian).
-+ *
-+ * \param op32 A pointer to a 4-byte array representing a 32-bit
-+ * integer in network byte order (big endian).
-+ *
-+ * \param op16 A 16-bit integer in host byte order.
-+ */
-+void uip_add32(u8_t *op32, u16_t op16);
++ /* If ip_reasstmr is zero, no packet is present in the buffer, so we
++ write the IP header of the fragment into the reassembly
++ buffer. The timer is updated with the maximum age. */
++ if(uip_reasstmr == 0) {
++ memcpy(uip_reassbuf, &BUF->vhl, IP_HLEN);
++ uip_reasstmr = UIP_REASS_MAXAGE;
++ uip_reassflags = 0;
++ /* Clear the bitmap. */
++ memset(uip_reassbitmap, sizeof(uip_reassbitmap), 0);
++ }
+
-+/**
-+ * Calculate the Internet checksum over a buffer.
-+ *
-+ * The Internet checksum is the one's complement of the one's
-+ * complement sum of all 16-bit words in the buffer.
-+ *
-+ * See RFC1071.
-+ *
-+ * \note This function is not called in the current version of uIP,
-+ * but future versions might make use of it.
-+ *
-+ * \param buf A pointer to the buffer over which the checksum is to be
-+ * computed.
-+ *
-+ * \param len The length of the buffer over which the checksum is to
-+ * be computed.
-+ *
-+ * \return The Internet checksum of the buffer.
-+ */
-+u16_t uip_chksum(u16_t *buf, u16_t len);
++ /* Check if the incoming fragment matches the one currently present
++ in the reasembly buffer. If so, we proceed with copying the
++ fragment into the buffer. */
++ if(BUF->srcipaddr[0] == FBUF->srcipaddr[0] &&
++ BUF->srcipaddr[1] == FBUF->srcipaddr[1] &&
++ BUF->destipaddr[0] == FBUF->destipaddr[0] &&
++ BUF->destipaddr[1] == FBUF->destipaddr[1] &&
++ BUF->ipid[0] == FBUF->ipid[0] &&
++ BUF->ipid[1] == FBUF->ipid[1]) {
+
-+/**
-+ * Calculate the IP header checksum of the packet header in uip_buf.
-+ *
-+ * The IP header checksum is the Internet checksum of the 20 bytes of
-+ * the IP header.
-+ *
-+ * \return The IP header checksum of the IP header in the uip_buf
-+ * buffer.
-+ */
-+u16_t uip_ipchksum(void);
++ len = (BUF->len[0] << 8) + BUF->len[1] - (BUF->vhl & 0x0f) * 4;
++ offset = (((BUF->ipoffset[0] & 0x3f) << 8) + BUF->ipoffset[1]) * 8;
+
-+/**
-+ * Calculate the TCP checksum of the packet in uip_buf and uip_appdata.
-+ *
-+ * The TCP checksum is the Internet checksum of data contents of the
-+ * TCP segment, and a pseudo-header as defined in RFC793.
-+ *
-+ * \note The uip_appdata pointer that points to the packet data may
-+ * point anywhere in memory, so it is not possible to simply calculate
-+ * the Internet checksum of the contents of the uip_buf buffer.
-+ *
-+ * \return The TCP checksum of the TCP segment in uip_buf and pointed
-+ * to by uip_appdata.
-+ */
-+u16_t uip_tcpchksum(void);
-+
-+/** @} */
-+
-+#endif /* __UIP_ARCH_H__ */
---- /dev/null
-+++ b/net/uip-0.9/uip_arp.c
-@@ -0,0 +1,421 @@
-+/**
-+ * \addtogroup uip
-+ * @{
-+ */
-+
-+/**
-+ * \defgroup uiparp uIP Address Resolution Protocol
-+ * @{
-+ *
-+ * The Address Resolution Protocol ARP is used for mapping between IP
-+ * addresses and link level addresses such as the Ethernet MAC
-+ * addresses. ARP uses broadcast queries to ask for the link level
-+ * address of a known IP address and the host which is configured with
-+ * the IP address for which the query was meant, will respond with its
-+ * link level address.
-+ *
-+ * \note This ARP implementation only supports Ethernet.
-+ */
-+
-+/**
-+ * \file
-+ * Implementation of the ARP Address Resolution Protocol.
-+ * \author Adam Dunkels <adam@dunkels.com>
-+ *
-+ */
-+
-+/*
-+ * Copyright (c) 2001-2003, Adam Dunkels.
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The name of the author may not be used to endorse or promote
-+ * products derived from this software without specific prior
-+ * written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
-+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ *
-+ * This file is part of the uIP TCP/IP stack.
-+ *
-+ * $Id: uip_arp.c,v 1.7.2.3 2003/10/06 22:42:30 adam Exp $
-+ *
-+ */
-+
-+
-+#include "uip_arp.h"
-+
-+struct arp_hdr {
-+ struct uip_eth_hdr ethhdr;
-+ u16_t hwtype;
-+ u16_t protocol;
-+ u8_t hwlen;
-+ u8_t protolen;
-+ u16_t opcode;
-+ struct uip_eth_addr shwaddr;
-+ u16_t sipaddr[2];
-+ struct uip_eth_addr dhwaddr;
-+ u16_t dipaddr[2];
-+};
-+
-+struct ethip_hdr {
-+ struct uip_eth_hdr ethhdr;
-+ /* IP header. */
-+ u8_t vhl,
-+ tos,
-+ len[2],
-+ ipid[2],
-+ ipoffset[2],
-+ ttl,
-+ proto;
-+ u16_t ipchksum;
-+ u16_t srcipaddr[2],
-+ destipaddr[2];
-+};
-+
-+#define ARP_REQUEST 1
-+#define ARP_REPLY 2
++ /* If the offset or the offset + fragment length overflows the
++ reassembly buffer, we discard the entire packet. */
++ if(offset > UIP_REASS_BUFSIZE ||
++ offset + len > UIP_REASS_BUFSIZE) {
++ uip_reasstmr = 0;
++ goto nullreturn;
++ }
+
-+#define ARP_HWTYPE_ETH 1
++ /* Copy the fragment into the reassembly buffer, at the right
++ offset. */
++ memcpy(&uip_reassbuf[IP_HLEN + offset],
++ (char *)BUF + (int)((BUF->vhl & 0x0f) * 4),
++ len);
++
++ /* Update the bitmap. */
++ if(offset / (8 * 8) == (offset + len) / (8 * 8)) {
++ /* If the two endpoints are in the same byte, we only update
++ that byte. */
++
++ uip_reassbitmap[offset / (8 * 8)] |=
++ bitmap_bits[(offset / 8 ) & 7] &
++ ~bitmap_bits[((offset + len) / 8 ) & 7];
++ } else {
++ /* If the two endpoints are in different bytes, we update the
++ bytes in the endpoints and fill the stuff inbetween with
++ 0xff. */
++ uip_reassbitmap[offset / (8 * 8)] |=
++ bitmap_bits[(offset / 8 ) & 7];
++ for(i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) {
++ uip_reassbitmap[i] = 0xff;
++ }
++ uip_reassbitmap[(offset + len) / (8 * 8)] |=
++ ~bitmap_bits[((offset + len) / 8 ) & 7];
++ }
++
++ /* If this fragment has the More Fragments flag set to zero, we
++ know that this is the last fragment, so we can calculate the
++ size of the entire packet. We also set the
++ IP_REASS_FLAG_LASTFRAG flag to indicate that we have received
++ the final fragment. */
+
-+struct arp_entry {
-+ u16_t ipaddr[2];
-+ struct uip_eth_addr ethaddr;
-+ u8_t time;
-+};
++ if((BUF->ipoffset[0] & IP_MF) == 0) {
++ uip_reassflags |= UIP_REASS_FLAG_LASTFRAG;
++ uip_reasslen = offset + len;
++ }
++
++ /* Finally, we check if we have a full packet in the buffer. We do
++ this by checking if we have the last fragment and if all bits
++ in the bitmap are set. */
++ if(uip_reassflags & UIP_REASS_FLAG_LASTFRAG) {
++ /* Check all bytes up to and including all but the last byte in
++ the bitmap. */
++ for(i = 0; i < uip_reasslen / (8 * 8) - 1; ++i) {
++ if(uip_reassbitmap[i] != 0xff) {
++ goto nullreturn;
++ }
++ }
++ /* Check the last byte in the bitmap. It should contain just the
++ right amount of bits. */
++ if(uip_reassbitmap[uip_reasslen / (8 * 8)] !=
++ (u8_t)~bitmap_bits[uip_reasslen / 8 & 7]) {
++ goto nullreturn;
++ }
+
-+struct uip_eth_addr uip_ethaddr = {{UIP_ETHADDR0,
-+ UIP_ETHADDR1,
-+ UIP_ETHADDR2,
-+ UIP_ETHADDR3,
-+ UIP_ETHADDR4,
-+ UIP_ETHADDR5}};
++ /* If we have come this far, we have a full packet in the
++ buffer, so we allocate a pbuf and copy the packet into it. We
++ also reset the timer. */
++ uip_reasstmr = 0;
++ memcpy(BUF, FBUF, uip_reasslen);
+
-+static struct arp_entry arp_table[UIP_ARPTAB_SIZE];
-+static u16_t ipaddr[2];
-+static u8_t i, c;
++ /* Pretend to be a "normal" (i.e., not fragmented) IP packet
++ from now on. */
++ BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
++ BUF->len[0] = uip_reasslen >> 8;
++ BUF->len[1] = uip_reasslen & 0xff;
++ BUF->ipchksum = 0;
++ BUF->ipchksum = ~(uip_ipchksum());
+
-+static u8_t arptime;
-+static u8_t tmpage;
++ return uip_reasslen;
++ }
++ }
+
-+#define BUF ((struct arp_hdr *)&uip_buf[0])
-+#define IPBUF ((struct ethip_hdr *)&uip_buf[0])
-+/*-----------------------------------------------------------------------------------*/
-+/**
-+ * Initialize the ARP module.
-+ *
-+ */
++ nullreturn:
++ return 0;
++}
++#endif /* UIP_REASSEMBL */
+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_arp_init(void)
++static void
++uip_add_rcv_nxt(unsigned short int n)
+{
-+ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
-+ memset(arp_table[i].ipaddr, 0, 4);
-+ }
++ uip_add32(uip_conn->rcv_nxt, n);
++ uip_conn->rcv_nxt[0] = uip_acc32[0];
++ uip_conn->rcv_nxt[1] = uip_acc32[1];
++ uip_conn->rcv_nxt[2] = uip_acc32[2];
++ uip_conn->rcv_nxt[3] = uip_acc32[3];
+}
+/*-----------------------------------------------------------------------------------*/
-+/**
-+ * Periodic ARP processing function.
-+ *
-+ * This function performs periodic timer processing in the ARP module
-+ * and should be called at regular intervals. The recommended interval
-+ * is 10 seconds between the calls.
-+ *
-+ */
-+/*-----------------------------------------------------------------------------------*/
+void
-+uip_arp_timer(void)
++uip_process(u8_t flag)
+{
-+ struct arp_entry *tabptr;
++ register struct uip_conn *uip_connr = uip_conn;
+
-+ ++arptime;
-+ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
-+ tabptr = &arp_table[i];
-+ if((tabptr->ipaddr[0] | tabptr->ipaddr[1]) != 0 &&
-+ arptime - tabptr->time >= UIP_ARP_MAXAGE) {
-+ memset(tabptr->ipaddr, 0, 4);
-+ }
-+ }
++ uip_appdata = &uip_buf[40 + UIP_LLH_LEN];
+
-+}
-+/*-----------------------------------------------------------------------------------*/
-+static void
-+uip_arp_update(u16_t *ipaddr, struct uip_eth_addr *ethaddr)
-+{
-+ register struct arp_entry *tabptr;
-+ /* Walk through the ARP mapping table and try to find an entry to
-+ update. If none is found, the IP -> MAC address mapping is
-+ inserted in the ARP table. */
-+ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++
++ /* Check if we were invoked because of the perodic timer fireing. */
++ if(flag == UIP_TIMER) {
++#if UIP_REASSEMBLY
++ if(uip_reasstmr != 0) {
++ --uip_reasstmr;
++ }
++#endif /* UIP_REASSEMBLY */
++ /* Increase the initial sequence number. */
++ if(++iss[3] == 0) {
++ if(++iss[2] == 0) {
++ if(++iss[1] == 0) {
++ ++iss[0];
++ }
++ }
++ }
++ uip_len = 0;
++ if(uip_connr->tcpstateflags == TIME_WAIT ||
++ uip_connr->tcpstateflags == FIN_WAIT_2) {
++ ++(uip_connr->timer);
++ if(uip_connr->timer == UIP_TIME_WAIT_TIMEOUT) {
++ uip_connr->tcpstateflags = CLOSED;
++ }
++ } else if(uip_connr->tcpstateflags != CLOSED) {
++ /* If the connection has outstanding data, we increase the
++ connection's timer and see if it has reached the RTO value
++ in which case we retransmit. */
++ if(uip_outstanding(uip_connr)) {
++ if(uip_connr->timer-- == 0) {
++ if(uip_connr->nrtx == UIP_MAXRTX ||
++ ((uip_connr->tcpstateflags == SYN_SENT ||
++ uip_connr->tcpstateflags == SYN_RCVD) &&
++ uip_connr->nrtx == UIP_MAXSYNRTX)) {
++ uip_connr->tcpstateflags = CLOSED;
+
-+ tabptr = &arp_table[i];
-+ /* Only check those entries that are actually in use. */
-+ if(tabptr->ipaddr[0] != 0 &&
-+ tabptr->ipaddr[1] != 0) {
++ /* We call UIP_APPCALL() with uip_flags set to
++ UIP_TIMEDOUT to inform the application that the
++ connection has timed out. */
++ uip_flags = UIP_TIMEDOUT;
++ UIP_APPCALL();
+
-+ /* Check if the source IP address of the incoming packet matches
-+ the IP address in this ARP table entry. */
-+ if(ipaddr[0] == tabptr->ipaddr[0] &&
-+ ipaddr[1] == tabptr->ipaddr[1]) {
-+
-+ /* An old entry found, update this and return. */
-+ memcpy(tabptr->ethaddr.addr, ethaddr->addr, 6);
-+ tabptr->time = arptime;
++ /* We also send a reset packet to the remote host. */
++ BUF->flags = TCP_RST | TCP_ACK;
++ goto tcp_send_nodata;
++ }
+
-+ return;
++ /* Exponential backoff. */
++ uip_connr->timer = UIP_RTO << (uip_connr->nrtx > 4?
++ 4:
++ uip_connr->nrtx);
++ ++(uip_connr->nrtx);
++
++ /* Ok, so we need to retransmit. We do this differently
++ depending on which state we are in. In ESTABLISHED, we
++ call upon the application so that it may prepare the
++ data for the retransmit. In SYN_RCVD, we resend the
++ SYNACK that we sent earlier and in LAST_ACK we have to
++ retransmit our FINACK. */
++ UIP_STAT(++uip_stat.tcp.rexmit);
++ switch(uip_connr->tcpstateflags & TS_MASK) {
++ case SYN_RCVD:
++ /* In the SYN_RCVD state, we should retransmit our
++ SYNACK. */
++ goto tcp_send_synack;
++
++#if UIP_ACTIVE_OPEN
++ case SYN_SENT:
++ /* In the SYN_SENT state, we retransmit out SYN. */
++ BUF->flags = 0;
++ goto tcp_send_syn;
++#endif /* UIP_ACTIVE_OPEN */
++
++ case ESTABLISHED:
++ /* In the ESTABLISHED state, we call upon the application
++ to do the actual retransmit after which we jump into
++ the code for sending out the packet (the apprexmit
++ label). */
++ uip_len = 0;
++ uip_slen = 0;
++ uip_flags = UIP_REXMIT;
++ UIP_APPCALL();
++ goto apprexmit;
++
++ case FIN_WAIT_1:
++ case CLOSING:
++ case LAST_ACK:
++ /* In all these states we should retransmit a FINACK. */
++ goto tcp_send_finack;
++
++ }
++ }
++ } else if((uip_connr->tcpstateflags & TS_MASK) == ESTABLISHED) {
++ /* If there was no need for a retransmission, we poll the
++ application for new data. */
++ uip_len = 0;
++ uip_slen = 0;
++ uip_flags = UIP_POLL;
++ UIP_APPCALL();
++ goto appsend;
+ }
+ }
++ goto drop;
+ }
-+
-+ /* If we get here, no existing ARP table entry was found, so we
-+ create one. */
-+
-+ /* First, we try to find an unused entry in the ARP table. */
-+ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
-+ tabptr = &arp_table[i];
-+ if(tabptr->ipaddr[0] == 0 &&
-+ tabptr->ipaddr[1] == 0) {
-+ break;
++#if UIP_UDP
++ if(flag == UIP_UDP_TIMER) {
++ if(uip_udp_conn->lport != 0) {
++ uip_appdata = &uip_buf[UIP_LLH_LEN + 28];
++ uip_len = uip_slen = 0;
++ uip_flags = UIP_POLL;
++ UIP_UDP_APPCALL();
++ goto udp_send;
++ } else {
++ goto drop;
+ }
+ }
++#endif
+
-+ /* If no unused entry is found, we try to find the oldest entry and
-+ throw it away. */
-+ if(i == UIP_ARPTAB_SIZE) {
-+ tmpage = 0;
-+ c = 0;
-+ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
-+ tabptr = &arp_table[i];
-+ if(arptime - tabptr->time > tmpage) {
-+ tmpage = arptime - tabptr->time;
-+ c = i;
-+ }
-+ }
-+ i = c;
-+ }
++ /* This is where the input processing starts. */
++ UIP_STAT(++uip_stat.ip.recv);
+
-+ /* Now, i is the ARP table entry which we will fill with the new
-+ information. */
-+ memcpy(tabptr->ipaddr, ipaddr, 4);
-+ memcpy(tabptr->ethaddr.addr, ethaddr->addr, 6);
-+ tabptr->time = arptime;
-+}
-+/*-----------------------------------------------------------------------------------*/
-+/**
-+ * ARP processing for incoming IP packets
-+ *
-+ * This function should be called by the device driver when an IP
-+ * packet has been received. The function will check if the address is
-+ * in the ARP cache, and if so the ARP cache entry will be
-+ * refreshed. If no ARP cache entry was found, a new one is created.
-+ *
-+ * This function expects an IP packet with a prepended Ethernet header
-+ * in the uip_buf[] buffer, and the length of the packet in the global
-+ * variable uip_len.
-+ */
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_arp_ipin(void)
-+{
-+ uip_len -= sizeof(struct uip_eth_hdr);
-+
-+ /* Only insert/update an entry if the source IP address of the
-+ incoming IP packet comes from a host on the local network. */
-+ if((IPBUF->srcipaddr[0] & uip_arp_netmask[0]) !=
-+ (uip_hostaddr[0] & uip_arp_netmask[0])) {
-+ return;
-+ }
-+ if((IPBUF->srcipaddr[1] & uip_arp_netmask[1]) !=
-+ (uip_hostaddr[1] & uip_arp_netmask[1])) {
-+ return;
++
++ /* Start of IPv4 input header processing code. */
++
++ /* Check validity of the IP header. */
++ if(BUF->vhl != 0x45) { /* IP version and header length. */
++ UIP_STAT(++uip_stat.ip.drop);
++ UIP_STAT(++uip_stat.ip.vhlerr);
++ UIP_LOG("ip: invalid version or header length.");
++ goto drop;
+ }
-+ uip_arp_update(IPBUF->srcipaddr, &(IPBUF->ethhdr.src));
+
-+ return;
-+}
-+/*-----------------------------------------------------------------------------------*/
-+/**
-+ * ARP processing for incoming ARP packets.
-+ *
-+ * This function should be called by the device driver when an ARP
-+ * packet has been received. The function will act differently
-+ * depending on the ARP packet type: if it is a reply for a request
-+ * that we previously sent out, the ARP cache will be filled in with
-+ * the values from the ARP reply. If the incoming ARP packet is an ARP
-+ * request for our IP address, an ARP reply packet is created and put
-+ * into the uip_buf[] buffer.
-+ *
-+ * When the function returns, the value of the global variable uip_len
-+ * indicates whether the device driver should send out a packet or
-+ * not. If uip_len is zero, no packet should be sent. If uip_len is
-+ * non-zero, it contains the length of the outbound packet that is
-+ * present in the uip_buf[] buffer.
-+ *
-+ * This function expects an ARP packet with a prepended Ethernet
-+ * header in the uip_buf[] buffer, and the length of the packet in the
-+ * global variable uip_len.
-+ */
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_arp_arpin(void)
-+{
-+
-+ if(uip_len < sizeof(struct arp_hdr)) {
-+ uip_len = 0;
-+ return;
++ /* Check the size of the packet. If the size reported to us in
++ uip_len doesn't match the size reported in the IP header, there
++ has been a transmission error and we drop the packet. */
++
++ if(BUF->len[0] != (uip_len >> 8)) { /* IP length, high byte. */
++ uip_len = (uip_len & 0xff) | (BUF->len[0] << 8);
++ }
++ if(BUF->len[1] != (uip_len & 0xff)) { /* IP length, low byte. */
++ uip_len = (uip_len & 0xff00) | BUF->len[1];
+ }
+
-+ uip_len = 0;
++ /* Check the fragment flag. */
++ if((BUF->ipoffset[0] & 0x3f) != 0 ||
++ BUF->ipoffset[1] != 0) {
++#if UIP_REASSEMBLY
++ uip_len = uip_reass();
++ if(uip_len == 0) {
++ goto drop;
++ }
++#else
++ UIP_STAT(++uip_stat.ip.drop);
++ UIP_STAT(++uip_stat.ip.fragerr);
++ UIP_LOG("ip: fragment dropped.");
++ goto drop;
++#endif /* UIP_REASSEMBLY */
++ }
+
-+ switch(BUF->opcode) {
-+ case HTONS(ARP_REQUEST):
-+ /* ARP request. If it asked for our address, we send out a
-+ reply. */
-+ if(BUF->dipaddr[0] == uip_hostaddr[0] &&
-+ BUF->dipaddr[1] == uip_hostaddr[1]) {
-+ /* The reply opcode is 2. */
-+ BUF->opcode = HTONS(2);
-+
-+ memcpy(BUF->dhwaddr.addr, BUF->shwaddr.addr, 6);
-+ memcpy(BUF->shwaddr.addr, uip_ethaddr.addr, 6);
-+ memcpy(BUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
-+ memcpy(BUF->ethhdr.dest.addr, BUF->dhwaddr.addr, 6);
-+
-+ BUF->dipaddr[0] = BUF->sipaddr[0];
-+ BUF->dipaddr[1] = BUF->sipaddr[1];
-+ BUF->sipaddr[0] = uip_hostaddr[0];
-+ BUF->sipaddr[1] = uip_hostaddr[1];
-+
-+ BUF->ethhdr.type = HTONS(UIP_ETHTYPE_ARP);
-+ uip_len = sizeof(struct arp_hdr);
-+ }
-+ break;
-+ case HTONS(ARP_REPLY):
-+ /* ARP reply. We insert or update the ARP table if it was meant
-+ for us. */
-+ if(BUF->dipaddr[0] == uip_hostaddr[0] &&
-+ BUF->dipaddr[1] == uip_hostaddr[1]) {
-+
-+ uip_arp_update(BUF->sipaddr, &BUF->shwaddr);
++ /* If we are configured to use ping IP address configuration and
++ hasn't been assigned an IP address yet, we accept all ICMP
++ packets. */
++#if UIP_PINGADDRCONF
++ if((uip_hostaddr[0] | uip_hostaddr[1]) == 0) {
++ if(BUF->proto == UIP_PROTO_ICMP) {
++ UIP_LOG("ip: possible ping config packet received.");
++ goto icmp_input;
++ } else {
++ UIP_LOG("ip: packet dropped since no address assigned.");
++ goto drop;
+ }
-+ break;
++ }
++#endif /* UIP_PINGADDRCONF */
++
++ /* Check if the packet is destined for our IP address. */
++ if(BUF->destipaddr[0] != uip_hostaddr[0]) {
++ UIP_STAT(++uip_stat.ip.drop);
++ UIP_LOG("ip: packet not for us.");
++ goto drop;
++ }
++ if(BUF->destipaddr[1] != uip_hostaddr[1]) {
++ UIP_STAT(++uip_stat.ip.drop);
++ UIP_LOG("ip: packet not for us.");
++ goto drop;
+ }
+
-+ return;
-+}
-+/*-----------------------------------------------------------------------------------*/
-+/**
-+ * Prepend Ethernet header to an outbound IP packet and see if we need
-+ * to send out an ARP request.
-+ *
-+ * This function should be called before sending out an IP packet. The
-+ * function checks the destination IP address of the IP packet to see
-+ * what Ethernet MAC address that should be used as a destination MAC
-+ * address on the Ethernet.
-+ *
-+ * If the destination IP address is in the local network (determined
-+ * by logical ANDing of netmask and our IP address), the function
-+ * checks the ARP cache to see if an entry for the destination IP
-+ * address is found. If so, an Ethernet header is prepended and the
-+ * function returns. If no ARP cache entry is found for the
-+ * destination IP address, the packet in the uip_buf[] is replaced by
-+ * an ARP request packet for the IP address. The IP packet is dropped
-+ * and it is assumed that they higher level protocols (e.g., TCP)
-+ * eventually will retransmit the dropped packet.
-+ *
-+ * If the destination IP address is not on the local network, the IP
-+ * address of the default router is used instead.
-+ *
-+ * When the function returns, a packet is present in the uip_buf[]
-+ * buffer, and the length of the packet is in the global variable
-+ * uip_len.
-+ */
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_arp_out(void)
-+{
-+ struct arp_entry *tabptr;
-+ /* Find the destination IP address in the ARP table and construct
-+ the Ethernet header. If the destination IP addres isn't on the
-+ local network, we use the default router's IP address instead.
++ if(uip_ipchksum() != 0xffff) { /* Compute and check the IP header
++ checksum. */
++ UIP_STAT(++uip_stat.ip.drop);
++ UIP_STAT(++uip_stat.ip.chkerr);
++ UIP_LOG("ip: bad checksum.");
++ goto drop;
++ }
+
-+ If not ARP table entry is found, we overwrite the original IP
-+ packet with an ARP request for the IP address. */
++ if(BUF->proto == UIP_PROTO_TCP) /* Check for TCP packet. If so, jump
++ to the tcp_input label. */
++ goto tcp_input;
+
-+ /* Check if the destination address is on the local network. */
-+ if((IPBUF->destipaddr[0] & uip_arp_netmask[0]) !=
-+ (uip_hostaddr[0] & uip_arp_netmask[0]) ||
-+ (IPBUF->destipaddr[1] & uip_arp_netmask[1]) !=
-+ (uip_hostaddr[1] & uip_arp_netmask[1])) {
-+ /* Destination address was not on the local network, so we need to
-+ use the default router's IP address instead of the destination
-+ address when determining the MAC address. */
-+ ipaddr[0] = uip_arp_draddr[0];
-+ ipaddr[1] = uip_arp_draddr[1];
-+ } else {
-+ /* Else, we use the destination IP address. */
-+ ipaddr[0] = IPBUF->destipaddr[0];
-+ ipaddr[1] = IPBUF->destipaddr[1];
++#if UIP_UDP
++ if(BUF->proto == UIP_PROTO_UDP)
++ goto udp_input;
++#endif /* UIP_UDP */
++
++ if(BUF->proto != UIP_PROTO_ICMP) { /* We only allow ICMP packets from
++ here. */
++ UIP_STAT(++uip_stat.ip.drop);
++ UIP_STAT(++uip_stat.ip.protoerr);
++ UIP_LOG("ip: neither tcp nor icmp.");
++ goto drop;
+ }
-+
-+ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
-+ tabptr = &arp_table[i];
-+ if(ipaddr[0] == tabptr->ipaddr[0] &&
-+ ipaddr[1] == tabptr->ipaddr[1])
-+ break;
++
++ //icmp_input:
++ UIP_STAT(++uip_stat.icmp.recv);
++
++ /* ICMP echo (i.e., ping) processing. This is simple, we only change
++ the ICMP type from ECHO to ECHO_REPLY and adjust the ICMP
++ checksum before we return the packet. */
++ if(ICMPBUF->type != ICMP_ECHO) {
++ UIP_STAT(++uip_stat.icmp.drop);
++ UIP_STAT(++uip_stat.icmp.typeerr);
++ UIP_LOG("icmp: not icmp echo.");
++ goto drop;
+ }
+
-+ if(i == UIP_ARPTAB_SIZE) {
-+ /* The destination address was not in our ARP table, so we
-+ overwrite the IP packet with an ARP request. */
++ /* If we are configured to use ping IP address assignment, we use
++ the destination IP address of this ping packet and assign it to
++ ourself. */
++#if UIP_PINGADDRCONF
++ if((uip_hostaddr[0] | uip_hostaddr[1]) == 0) {
++ uip_hostaddr[0] = BUF->destipaddr[0];
++ uip_hostaddr[1] = BUF->destipaddr[1];
++ }
++#endif /* UIP_PINGADDRCONF */
++
++ ICMPBUF->type = ICMP_ECHO_REPLY;
++
++ if(ICMPBUF->icmpchksum >= HTONS(0xffff - (ICMP_ECHO << 8))) {
++ ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8) + 1;
++ } else {
++ ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8);
++ }
++
++ /* Swap IP addresses. */
++ tmp16 = BUF->destipaddr[0];
++ BUF->destipaddr[0] = BUF->srcipaddr[0];
++ BUF->srcipaddr[0] = tmp16;
++ tmp16 = BUF->destipaddr[1];
++ BUF->destipaddr[1] = BUF->srcipaddr[1];
++ BUF->srcipaddr[1] = tmp16;
+
-+ memset(BUF->ethhdr.dest.addr, 0xff, 6);
-+ memset(BUF->dhwaddr.addr, 0x00, 6);
-+ memcpy(BUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
-+ memcpy(BUF->shwaddr.addr, uip_ethaddr.addr, 6);
-+
-+ BUF->dipaddr[0] = ipaddr[0];
-+ BUF->dipaddr[1] = ipaddr[1];
-+ BUF->sipaddr[0] = uip_hostaddr[0];
-+ BUF->sipaddr[1] = uip_hostaddr[1];
-+ BUF->opcode = HTONS(ARP_REQUEST); /* ARP request. */
-+ BUF->hwtype = HTONS(ARP_HWTYPE_ETH);
-+ BUF->protocol = HTONS(UIP_ETHTYPE_IP);
-+ BUF->hwlen = 6;
-+ BUF->protolen = 4;
-+ BUF->ethhdr.type = HTONS(UIP_ETHTYPE_ARP);
++ UIP_STAT(++uip_stat.icmp.sent);
++ goto send;
+
-+ uip_appdata = &uip_buf[40 + UIP_LLH_LEN];
-+
-+ uip_len = sizeof(struct arp_hdr);
-+ return;
++ /* End of IPv4 input header processing code. */
++
++
++#if UIP_UDP
++ /* UDP input processing. */
++ udp_input:
++ /* UDP processing is really just a hack. We don't do anything to the
++ UDP/IP headers, but let the UDP application do all the hard
++ work. If the application sets uip_slen, it has a packet to
++ send. */
++#if UIP_UDP_CHECKSUMS
++ if(uip_udpchksum() != 0xffff) {
++ UIP_STAT(++uip_stat.udp.drop);
++ UIP_STAT(++uip_stat.udp.chkerr);
++ UIP_LOG("udp: bad checksum.");
++ goto drop;
++ }
++#endif /* UIP_UDP_CHECKSUMS */
++
++ /* Demultiplex this UDP packet between the UDP "connections". */
++ for(uip_udp_conn = &uip_udp_conns[0];
++ uip_udp_conn < &uip_udp_conns[UIP_UDP_CONNS];
++ ++uip_udp_conn) {
++ if(uip_udp_conn->lport != 0 &&
++ UDPBUF->destport == uip_udp_conn->lport &&
++ (uip_udp_conn->rport == 0 ||
++ UDPBUF->srcport == uip_udp_conn->rport) &&
++ BUF->srcipaddr[0] == uip_udp_conn->ripaddr[0] &&
++ BUF->srcipaddr[1] == uip_udp_conn->ripaddr[1]) {
++ goto udp_found;
++ }
++ }
++ goto drop;
++
++ udp_found:
++ uip_len = uip_len - 28;
++ uip_appdata = &uip_buf[UIP_LLH_LEN + 28];
++ uip_flags = UIP_NEWDATA;
++ uip_slen = 0;
++ UIP_UDP_APPCALL();
++ udp_send:
++ if(uip_slen == 0) {
++ goto drop;
+ }
++ uip_len = uip_slen + 28;
+
-+ /* Build an ethernet header. */
-+ memcpy(IPBUF->ethhdr.dest.addr, tabptr->ethaddr.addr, 6);
-+ memcpy(IPBUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
++ BUF->len[0] = (uip_len >> 8);
++ BUF->len[1] = (uip_len & 0xff);
+
-+ IPBUF->ethhdr.type = HTONS(UIP_ETHTYPE_IP);
++ BUF->proto = UIP_PROTO_UDP;
+
-+ uip_len += sizeof(struct uip_eth_hdr);
-+}
-+/*-----------------------------------------------------------------------------------*/
++ UDPBUF->udplen = HTONS(uip_slen + 8);
++ UDPBUF->udpchksum = 0;
++#if UIP_UDP_CHECKSUMS
++ /* Calculate UDP checksum. */
++ UDPBUF->udpchksum = ~(uip_udpchksum());
++ if(UDPBUF->udpchksum == 0) {
++ UDPBUF->udpchksum = 0xffff;
++ }
++#endif /* UIP_UDP_CHECKSUMS */
+
-+/** @} */
-+/** @} */
---- /dev/null
-+++ b/net/uip-0.9/uip_arp.h
-@@ -0,0 +1,201 @@
-+/**
-+ * \addtogroup uip
-+ * @{
-+ */
++ BUF->srcport = uip_udp_conn->lport;
++ BUF->destport = uip_udp_conn->rport;
+
-+/**
-+ * \addtogroup uiparp
-+ * @{
-+ */
++ BUF->srcipaddr[0] = uip_hostaddr[0];
++ BUF->srcipaddr[1] = uip_hostaddr[1];
++ BUF->destipaddr[0] = uip_udp_conn->ripaddr[0];
++ BUF->destipaddr[1] = uip_udp_conn->ripaddr[1];
+
-+/**
-+ * \file
-+ * Macros and definitions for the ARP module.
-+ * \author Adam Dunkels <adam@dunkels.com>
-+ */
++ uip_appdata = &uip_buf[UIP_LLH_LEN + 40];
++ goto ip_send_nolen;
++#endif /* UIP_UDP */
+
++ /* TCP input processing. */
++ tcp_input:
++ UIP_STAT(++uip_stat.tcp.recv);
+
-+/*
-+ * Copyright (c) 2001-2003, Adam Dunkels.
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The name of the author may not be used to endorse or promote
-+ * products derived from this software without specific prior
-+ * written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
-+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ *
-+ * This file is part of the uIP TCP/IP stack.
-+ *
-+ * $Id: uip_arp.h,v 1.3.2.2 2003/10/06 15:10:22 adam Exp $
-+ *
-+ */
-+
-+#ifndef __UIP_ARP_H__
-+#define __UIP_ARP_H__
-+
-+#include "uip.h"
-+
++ /* Start of TCP input header processing code. */
++
++ if(uip_tcpchksum() != 0xffff) { /* Compute and check the TCP
++ checksum. */
++ UIP_STAT(++uip_stat.tcp.drop);
++ UIP_STAT(++uip_stat.tcp.chkerr);
++ UIP_LOG("tcp: bad checksum.");
++ goto drop;
++ }
++
++ /* Demultiplex this segment. */
++ /* First check any active connections. */
++ for(uip_connr = &uip_conns[0]; uip_connr < &uip_conns[UIP_CONNS]; ++uip_connr) {
++ if(uip_connr->tcpstateflags != CLOSED &&
++ BUF->destport == uip_connr->lport &&
++ BUF->srcport == uip_connr->rport &&
++ BUF->srcipaddr[0] == uip_connr->ripaddr[0] &&
++ BUF->srcipaddr[1] == uip_connr->ripaddr[1]) {
++ goto found;
++ }
++ }
+
-+/**
-+ * Representation of a 48-bit Ethernet address.
-+ */
-+struct uip_eth_addr {
-+ u8_t addr[6];
-+};
++ /* If we didn't find and active connection that expected the packet,
++ either this packet is an old duplicate, or this is a SYN packet
++ destined for a connection in LISTEN. If the SYN flag isn't set,
++ it is an old packet and we send a RST. */
++ if((BUF->flags & TCP_CTL) != TCP_SYN)
++ goto reset;
++
++ tmp16 = BUF->destport;
++ /* Next, check listening connections. */
++ for(c = 0; c < UIP_LISTENPORTS; ++c) {
++ if(tmp16 == uip_listenports[c])
++ goto found_listen;
++ }
++
++ /* No matching connection found, so we send a RST packet. */
++ UIP_STAT(++uip_stat.tcp.synrst);
++ reset:
+
-+extern struct uip_eth_addr uip_ethaddr;
++ /* We do not send resets in response to resets. */
++ if(BUF->flags & TCP_RST)
++ goto drop;
+
-+/**
-+ * The Ethernet header.
-+ */
-+struct uip_eth_hdr {
-+ struct uip_eth_addr dest;
-+ struct uip_eth_addr src;
-+ u16_t type;
-+};
++ UIP_STAT(++uip_stat.tcp.rst);
++
++ BUF->flags = TCP_RST | TCP_ACK;
++ uip_len = 40;
++ BUF->tcpoffset = 5 << 4;
+
-+#define UIP_ETHTYPE_ARP 0x0806
-+#define UIP_ETHTYPE_IP 0x0800
-+#define UIP_ETHTYPE_IP6 0x86dd
++ /* Flip the seqno and ackno fields in the TCP header. */
++ c = BUF->seqno[3];
++ BUF->seqno[3] = BUF->ackno[3];
++ BUF->ackno[3] = c;
++
++ c = BUF->seqno[2];
++ BUF->seqno[2] = BUF->ackno[2];
++ BUF->ackno[2] = c;
++
++ c = BUF->seqno[1];
++ BUF->seqno[1] = BUF->ackno[1];
++ BUF->ackno[1] = c;
++
++ c = BUF->seqno[0];
++ BUF->seqno[0] = BUF->ackno[0];
++ BUF->ackno[0] = c;
+
++ /* We also have to increase the sequence number we are
++ acknowledging. If the least significant byte overflowed, we need
++ to propagate the carry to the other bytes as well. */
++ if(++BUF->ackno[3] == 0) {
++ if(++BUF->ackno[2] == 0) {
++ if(++BUF->ackno[1] == 0) {
++ ++BUF->ackno[0];
++ }
++ }
++ }
++
++ /* Swap port numbers. */
++ tmp16 = BUF->srcport;
++ BUF->srcport = BUF->destport;
++ BUF->destport = tmp16;
++
++ /* Swap IP addresses. */
++ tmp16 = BUF->destipaddr[0];
++ BUF->destipaddr[0] = BUF->srcipaddr[0];
++ BUF->srcipaddr[0] = tmp16;
++ tmp16 = BUF->destipaddr[1];
++ BUF->destipaddr[1] = BUF->srcipaddr[1];
++ BUF->srcipaddr[1] = tmp16;
+
-+/* The uip_arp_init() function must be called before any of the other
-+ ARP functions. */
-+void uip_arp_init(void);
++
++ /* And send out the RST packet! */
++ goto tcp_send_noconn;
+
-+/* The uip_arp_ipin() function should be called whenever an IP packet
-+ arrives from the Ethernet. This function refreshes the ARP table or
-+ inserts a new mapping if none exists. The function assumes that an
-+ IP packet with an Ethernet header is present in the uip_buf buffer
-+ and that the length of the packet is in the uip_len variable. */
-+void uip_arp_ipin(void);
++ /* This label will be jumped to if we matched the incoming packet
++ with a connection in LISTEN. In that case, we should create a new
++ connection and send a SYNACK in return. */
++ found_listen:
++ /* First we check if there are any connections avaliable. Unused
++ connections are kept in the same table as used connections, but
++ unused ones have the tcpstate set to CLOSED. Also, connections in
++ TIME_WAIT are kept track of and we'll use the oldest one if no
++ CLOSED connections are found. Thanks to Eddie C. Dost for a very
++ nice algorithm for the TIME_WAIT search. */
++ uip_connr = 0;
++ for(c = 0; c < UIP_CONNS; ++c) {
++ if(uip_conns[c].tcpstateflags == CLOSED) {
++ uip_connr = &uip_conns[c];
++ break;
++ }
++ if(uip_conns[c].tcpstateflags == TIME_WAIT) {
++ if(uip_connr == 0 ||
++ uip_conns[c].timer > uip_connr->timer) {
++ uip_connr = &uip_conns[c];
++ }
++ }
++ }
+
-+/* The uip_arp_arpin() should be called when an ARP packet is received
-+ by the Ethernet driver. This function also assumes that the
-+ Ethernet frame is present in the uip_buf buffer. When the
-+ uip_arp_arpin() function returns, the contents of the uip_buf
-+ buffer should be sent out on the Ethernet if the uip_len variable
-+ is > 0. */
-+void uip_arp_arpin(void);
++ if(uip_connr == 0) {
++ /* All connections are used already, we drop packet and hope that
++ the remote end will retransmit the packet at a time when we
++ have more spare connections. */
++ UIP_STAT(++uip_stat.tcp.syndrop);
++ UIP_LOG("tcp: found no unused connections.");
++ goto drop;
++ }
++ uip_conn = uip_connr;
++
++ /* Fill in the necessary fields for the new connection. */
++ uip_connr->rto = uip_connr->timer = UIP_RTO;
++ uip_connr->sa = 0;
++ uip_connr->sv = 4;
++ uip_connr->nrtx = 0;
++ uip_connr->lport = BUF->destport;
++ uip_connr->rport = BUF->srcport;
++ uip_connr->ripaddr[0] = BUF->srcipaddr[0];
++ uip_connr->ripaddr[1] = BUF->srcipaddr[1];
++ uip_connr->tcpstateflags = SYN_RCVD;
+
-+/* The uip_arp_out() function should be called when an IP packet
-+ should be sent out on the Ethernet. This function creates an
-+ Ethernet header before the IP header in the uip_buf buffer. The
-+ Ethernet header will have the correct Ethernet MAC destination
-+ address filled in if an ARP table entry for the destination IP
-+ address (or the IP address of the default router) is present. If no
-+ such table entry is found, the IP packet is overwritten with an ARP
-+ request and we rely on TCP to retransmit the packet that was
-+ overwritten. In any case, the uip_len variable holds the length of
-+ the Ethernet frame that should be transmitted. */
-+void uip_arp_out(void);
++ uip_connr->snd_nxt[0] = iss[0];
++ uip_connr->snd_nxt[1] = iss[1];
++ uip_connr->snd_nxt[2] = iss[2];
++ uip_connr->snd_nxt[3] = iss[3];
++ uip_connr->len = 1;
+
-+/* The uip_arp_timer() function should be called every ten seconds. It
-+ is responsible for flushing old entries in the ARP table. */
-+void uip_arp_timer(void);
++ /* rcv_nxt should be the seqno from the incoming packet + 1. */
++ uip_connr->rcv_nxt[3] = BUF->seqno[3];
++ uip_connr->rcv_nxt[2] = BUF->seqno[2];
++ uip_connr->rcv_nxt[1] = BUF->seqno[1];
++ uip_connr->rcv_nxt[0] = BUF->seqno[0];
++ uip_add_rcv_nxt(1);
+
-+/** @} */
-+
-+/**
-+ * \addtogroup uipconffunc
-+ * @{
-+ */
-+
-+/**
-+ * Set the default router's IP address.
-+ *
-+ * \param addr A pointer to a 4-byte array containing the IP address
-+ * of the default router.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_setdraddr(addr) do { uip_arp_draddr[0] = addr[0]; \
-+ uip_arp_draddr[1] = addr[1]; } while(0)
-+
-+/**
-+ * Set the netmask.
-+ *
-+ * \param addr A pointer to a 4-byte array containing the IP address
-+ * of the netmask.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_setnetmask(addr) do { uip_arp_netmask[0] = addr[0]; \
-+ uip_arp_netmask[1] = addr[1]; } while(0)
-+
-+
-+/**
-+ * Get the default router's IP address.
-+ *
-+ * \param addr A pointer to a 4-byte array that will be filled in with
-+ * the IP address of the default router.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_getdraddr(addr) do { addr[0] = uip_arp_draddr[0]; \
-+ addr[1] = uip_arp_draddr[1]; } while(0)
-+
-+/**
-+ * Get the netmask.
-+ *
-+ * \param addr A pointer to a 4-byte array that will be filled in with
-+ * the value of the netmask.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_getnetmask(addr) do { addr[0] = uip_arp_netmask[0]; \
-+ addr[1] = uip_arp_netmask[1]; } while(0)
-+
-+
-+/**
-+ * Specifiy the Ethernet MAC address.
-+ *
-+ * The ARP code needs to know the MAC address of the Ethernet card in
-+ * order to be able to respond to ARP queries and to generate working
-+ * Ethernet headers.
-+ *
-+ * \note This macro only specifies the Ethernet MAC address to the ARP
-+ * code. It cannot be used to change the MAC address of the Ethernet
-+ * card.
-+ *
-+ * \param eaddr A pointer to a struct uip_eth_addr containing the
-+ * Ethernet MAC address of the Ethernet card.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_setethaddr(eaddr) do {uip_ethaddr.addr[0] = eaddr.addr[0]; \
-+ uip_ethaddr.addr[1] = eaddr.addr[1];\
-+ uip_ethaddr.addr[2] = eaddr.addr[2];\
-+ uip_ethaddr.addr[3] = eaddr.addr[3];\
-+ uip_ethaddr.addr[4] = eaddr.addr[4];\
-+ uip_ethaddr.addr[5] = eaddr.addr[5];} while(0)
-+
-+/** @} */
-+
-+/**
-+ * \internal Internal variables that are set using the macros
-+ * uip_setdraddr and uip_setnetmask.
-+ */
-+extern u16_t uip_arp_draddr[2], uip_arp_netmask[2];
-+#endif /* __UIP_ARP_H__ */
-+
-+
---- /dev/null
-+++ b/net/uip-0.9/uip.c
-@@ -0,0 +1,1503 @@
-+/**
-+ * \addtogroup uip
-+ * @{
-+ */
-+
-+/**
-+ * \file
-+ * The uIP TCP/IP stack code.
-+ * \author Adam Dunkels <adam@dunkels.com>
-+ */
-+
-+/*
-+ * Copyright (c) 2001-2003, Adam Dunkels.
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The name of the author may not be used to endorse or promote
-+ * products derived from this software without specific prior
-+ * written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
-+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ *
-+ * This file is part of the uIP TCP/IP stack.
-+ *
-+ * $Id: uip.c,v 1.62.2.10 2003/10/07 13:23:01 adam Exp $
-+ *
-+ */
-+
-+/*
-+This is a small implementation of the IP and TCP protocols (as well as
-+some basic ICMP stuff). The implementation couples the IP, TCP and the
-+application layers very tightly. To keep the size of the compiled code
-+down, this code also features heavy usage of the goto statement.
-+
-+The principle is that we have a small buffer, called the uip_buf, in
-+which the device driver puts an incoming packet. The TCP/IP stack
-+parses the headers in the packet, and calls upon the application. If
-+the remote host has sent data to the application, this data is present
-+in the uip_buf and the application read the data from there. It is up
-+to the application to put this data into a byte stream if needed. The
-+application will not be fed with data that is out of sequence.
-+
-+If the application whishes to send data to the peer, it should put its
-+data into the uip_buf, 40 bytes from the start of the buffer. The
-+TCP/IP stack will calculate the checksums, and fill in the necessary
-+header fields and finally send the packet back to the peer.
-+*/
-+
-+#include "uip.h"
-+#include "uipopt.h"
-+#include "uip_arch.h"
-+
-+/*-----------------------------------------------------------------------------------*/
-+/* Variable definitions. */
-+
-+
-+/* The IP address of this host. If it is defined to be fixed (by setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set here. Otherwise, the address */
-+#if UIP_FIXEDADDR > 0
-+const unsigned short int uip_hostaddr[2] =
-+ {HTONS((UIP_IPADDR0 << 8) | UIP_IPADDR1),
-+ HTONS((UIP_IPADDR2 << 8) | UIP_IPADDR3)};
-+const unsigned short int uip_arp_draddr[2] =
-+ {HTONS((UIP_DRIPADDR0 << 8) | UIP_DRIPADDR1),
-+ HTONS((UIP_DRIPADDR2 << 8) | UIP_DRIPADDR3)};
-+const unsigned short int uip_arp_netmask[2] =
-+ {HTONS((UIP_NETMASK0 << 8) | UIP_NETMASK1),
-+ HTONS((UIP_NETMASK2 << 8) | UIP_NETMASK3)};
-+#else
-+unsigned short int uip_hostaddr[2];
-+unsigned short int uip_arp_draddr[2], uip_arp_netmask[2];
-+#endif /* UIP_FIXEDADDR */
-+
-+u8_t uip_buf[UIP_BUFSIZE+2]; /* The packet buffer that contains
-+ incoming packets. */
-+volatile u8_t *uip_appdata; /* The uip_appdata pointer points to
-+ application data. */
-+volatile u8_t *uip_sappdata; /* The uip_appdata pointer points to the
-+ application data which is to be sent. */
-+#if UIP_URGDATA > 0
-+volatile u8_t *uip_urgdata; /* The uip_urgdata pointer points to
-+ urgent data (out-of-band data), if
-+ present. */
-+volatile u8_t uip_urglen, uip_surglen;
-+#endif /* UIP_URGDATA > 0 */
-+
-+volatile unsigned short int uip_len, uip_slen;
-+ /* The uip_len is either 8 or 16 bits,
-+ depending on the maximum packet
-+ size. */
-+
-+volatile u8_t uip_flags; /* The uip_flags variable is used for
-+ communication between the TCP/IP stack
-+ and the application program. */
-+struct uip_conn *uip_conn; /* uip_conn always points to the current
-+ connection. */
-+
-+struct uip_conn uip_conns[UIP_CONNS];
-+ /* The uip_conns array holds all TCP
-+ connections. */
-+unsigned short int uip_listenports[UIP_LISTENPORTS];
-+ /* The uip_listenports list all currently
-+ listning ports. */
-+#if UIP_UDP
-+struct uip_udp_conn *uip_udp_conn;
-+struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
-+#endif /* UIP_UDP */
-+
-+
-+static unsigned short int ipid; /* Ths ipid variable is an increasing
-+ number that is used for the IP ID
-+ field. */
-+
-+static u8_t iss[4]; /* The iss variable is used for the TCP
-+ initial sequence number. */
-+
-+#if UIP_ACTIVE_OPEN
-+static unsigned short int lastport; /* Keeps track of the last port used for
-+ a new connection. */
-+#endif /* UIP_ACTIVE_OPEN */
-+
-+/* Temporary variables. */
-+volatile u8_t uip_acc32[4];
-+static u8_t c, opt;
-+static unsigned short int tmp16;
-+
-+/* Structures and definitions. */
-+#define TCP_FIN 0x01
-+#define TCP_SYN 0x02
-+#define TCP_RST 0x04
-+#define TCP_PSH 0x08
-+#define TCP_ACK 0x10
-+#define TCP_URG 0x20
-+#define TCP_CTL 0x3f
-+
-+#define ICMP_ECHO_REPLY 0
-+#define ICMP_ECHO 8
-+
-+/* Macros. */
-+#define BUF ((uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
-+#define FBUF ((uip_tcpip_hdr *)&uip_reassbuf[0])
-+#define ICMPBUF ((uip_icmpip_hdr *)&uip_buf[UIP_LLH_LEN])
-+#define UDPBUF ((uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])
-+
-+#if UIP_STATISTICS == 1
-+struct uip_stats uip_stat;
-+#define UIP_STAT(s) s
-+#else
-+#define UIP_STAT(s)
-+#endif /* UIP_STATISTICS == 1 */
-+
-+#if UIP_LOGGING == 1
-+extern void puts(const char *s);
-+#define UIP_LOG(m) puts(m)
-+#else
-+#define UIP_LOG(m)
-+#endif /* UIP_LOGGING == 1 */
-+
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_init(void)
-+{
-+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
-+ uip_listenports[c] = 0;
-+ }
-+ for(c = 0; c < UIP_CONNS; ++c) {
-+ uip_conns[c].tcpstateflags = CLOSED;
-+ }
-+#if UIP_ACTIVE_OPEN
-+ lastport = 1024;
-+#endif /* UIP_ACTIVE_OPEN */
-+
-+#if UIP_UDP
-+ for(c = 0; c < UIP_UDP_CONNS; ++c) {
-+ uip_udp_conns[c].lport = 0;
-+ }
-+#endif /* UIP_UDP */
-+
-+
-+ /* IPv4 initialization. */
-+#if UIP_FIXEDADDR == 0
-+ uip_hostaddr[0] = uip_hostaddr[1] = 0;
-+#endif /* UIP_FIXEDADDR */
-+
-+}
-+/*-----------------------------------------------------------------------------------*/
-+#if UIP_ACTIVE_OPEN
-+struct uip_conn *
-+uip_connect(unsigned short int *ripaddr, unsigned short int rport)
-+{
-+ register struct uip_conn *conn, *cconn;
-+
-+ /* Find an unused local port. */
-+ again:
-+ ++lastport;
-+
-+ if(lastport >= 32000) {
-+ lastport = 4096;
-+ }
-+
-+ /* Check if this port is already in use, and if so try to find
-+ another one. */
-+ for(c = 0; c < UIP_CONNS; ++c) {
-+ conn = &uip_conns[c];
-+ if(conn->tcpstateflags != CLOSED &&
-+ conn->lport == htons(lastport)) {
-+ goto again;
-+ }
-+ }
-+
-+
-+ conn = 0;
-+ for(c = 0; c < UIP_CONNS; ++c) {
-+ cconn = &uip_conns[c];
-+ if(cconn->tcpstateflags == CLOSED) {
-+ conn = cconn;
-+ break;
-+ }
-+ if(cconn->tcpstateflags == TIME_WAIT) {
-+ if(conn == 0 ||
-+ cconn->timer > uip_conn->timer) {
-+ conn = cconn;
-+ }
-+ }
-+ }
-+
-+ if(conn == 0) {
-+ return 0;
-+ }
-+
-+ conn->tcpstateflags = SYN_SENT;
-+
-+ conn->snd_nxt[0] = iss[0];
-+ conn->snd_nxt[1] = iss[1];
-+ conn->snd_nxt[2] = iss[2];
-+ conn->snd_nxt[3] = iss[3];
-+
-+ conn->initialmss = conn->mss = UIP_TCP_MSS;
-+
-+ conn->len = 1; /* TCP length of the SYN is one. */
-+ conn->nrtx = 0;
-+ conn->timer = 1; /* Send the SYN next time around. */
-+ conn->rto = UIP_RTO;
-+ conn->sa = 0;
-+ conn->sv = 16;
-+ conn->lport = htons(lastport);
-+ conn->rport = rport;
-+ conn->ripaddr[0] = ripaddr[0];
-+ conn->ripaddr[1] = ripaddr[1];
-+
-+ return conn;
-+}
-+#endif /* UIP_ACTIVE_OPEN */
-+/*-----------------------------------------------------------------------------------*/
-+#if UIP_UDP
-+struct uip_udp_conn *
-+uip_udp_new(unsigned short int *ripaddr, unsigned short int rport)
-+{
-+ register struct uip_udp_conn *conn;
-+
-+ /* Find an unused local port. */
-+ again:
-+ ++lastport;
-+
-+ if(lastport >= 32000) {
-+ lastport = 4096;
-+ }
-+
-+ for(c = 0; c < UIP_UDP_CONNS; ++c) {
-+ if(uip_udp_conns[c].lport == lastport) {
-+ goto again;
-+ }
-+ }
-+
-+
-+ conn = 0;
-+ for(c = 0; c < UIP_UDP_CONNS; ++c) {
-+ if(uip_udp_conns[c].lport == 0) {
-+ conn = &uip_udp_conns[c];
-+ break;
++ /* Parse the TCP MSS option, if present. */
++ if((BUF->tcpoffset & 0xf0) > 0x50) {
++ for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
++ opt = uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + c];
++ if(opt == 0x00) {
++ /* End of options. */
++ break;
++ } else if(opt == 0x01) {
++ ++c;
++ /* NOP option. */
++ } else if(opt == 0x02 &&
++ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0x04) {
++ /* An MSS option with the right option length. */
++ tmp16 = ((unsigned short int)uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
++ (unsigned short int)uip_buf[40 + UIP_LLH_LEN + 3 + c];
++ uip_connr->initialmss = uip_connr->mss =
++ tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
++
++ /* And we are done processing options. */
++ break;
++ } else {
++ /* All other options have a length field, so that we easily
++ can skip past them. */
++ if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
++ /* If the length field is zero, the options are malformed
++ and we don't process them further. */
++ break;
++ }
++ c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
++ }
+ }
+ }
-+
-+ if(conn == 0) {
-+ return 0;
-+ }
+
-+ conn->lport = HTONS(lastport);
-+ conn->rport = HTONS(rport);
-+ conn->ripaddr[0] = ripaddr[0];
-+ conn->ripaddr[1] = ripaddr[1];
-+
-+ return conn;
-+}
-+#endif /* UIP_UDP */
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_unlisten(unsigned short int port)
-+{
-+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
-+ if(uip_listenports[c] == port) {
-+ uip_listenports[c] = 0;
-+ return;
-+ }
-+ }
-+}
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_listen(unsigned short int port)
-+{
-+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
-+ if(uip_listenports[c] == 0) {
-+ uip_listenports[c] = port;
-+ return;
-+ }
-+ }
-+}
-+/*-----------------------------------------------------------------------------------*/
-+/* XXX: IP fragment reassembly: not well-tested. */
-+
-+#if UIP_REASSEMBLY
-+#define UIP_REASS_BUFSIZE (UIP_BUFSIZE - UIP_LLH_LEN)
-+static u8_t uip_reassbuf[UIP_REASS_BUFSIZE];
-+static u8_t uip_reassbitmap[UIP_REASS_BUFSIZE / (8 * 8)];
-+static const u8_t bitmap_bits[8] = {0xff, 0x7f, 0x3f, 0x1f,
-+ 0x0f, 0x07, 0x03, 0x01};
-+static unsigned short int uip_reasslen;
-+static u8_t uip_reassflags;
-+#define UIP_REASS_FLAG_LASTFRAG 0x01
-+static u8_t uip_reasstmr;
++ /* Our response will be a SYNACK. */
++#if UIP_ACTIVE_OPEN
++ tcp_send_synack:
++ BUF->flags = TCP_ACK;
++
++ tcp_send_syn:
++ BUF->flags |= TCP_SYN;
++#else /* UIP_ACTIVE_OPEN */
++ tcp_send_synack:
++ BUF->flags = TCP_SYN | TCP_ACK;
++#endif /* UIP_ACTIVE_OPEN */
++
++ /* We send out the TCP Maximum Segment Size option with our
++ SYNACK. */
++ BUF->optdata[0] = 2;
++ BUF->optdata[1] = 4;
++ BUF->optdata[2] = (UIP_TCP_MSS) / 256;
++ BUF->optdata[3] = (UIP_TCP_MSS) & 255;
++ uip_len = 44;
++ BUF->tcpoffset = 6 << 4;
++ goto tcp_send;
+
-+#define IP_HLEN 20
-+#define IP_MF 0x20
++ /* This label will be jumped to if we found an active connection. */
++ found:
++ uip_conn = uip_connr;
++ uip_flags = 0;
+
-+static u8_t
-+uip_reass(void)
-+{
-+ unsigned short int offset, len;
-+ unsigned short int i;
++ /* We do a very naive form of TCP reset processing; we just accept
++ any RST and kill our connection. We should in fact check if the
++ sequence number of this reset is wihtin our advertised window
++ before we accept the reset. */
++ if(BUF->flags & TCP_RST) {
++ uip_connr->tcpstateflags = CLOSED;
++ UIP_LOG("tcp: got reset, aborting connection.");
++ uip_flags = UIP_ABORT;
++ UIP_APPCALL();
++ goto drop;
++ }
++ /* Calculated the length of the data, if the application has sent
++ any data to us. */
++ c = (BUF->tcpoffset >> 4) << 2;
++ /* uip_len will contain the length of the actual TCP data. This is
++ calculated by subtracing the length of the TCP header (in
++ c) and the length of the IP header (20 bytes). */
++ uip_len = uip_len - c - 20;
+
-+ /* If ip_reasstmr is zero, no packet is present in the buffer, so we
-+ write the IP header of the fragment into the reassembly
-+ buffer. The timer is updated with the maximum age. */
-+ if(uip_reasstmr == 0) {
-+ memcpy(uip_reassbuf, &BUF->vhl, IP_HLEN);
-+ uip_reasstmr = UIP_REASS_MAXAGE;
-+ uip_reassflags = 0;
-+ /* Clear the bitmap. */
-+ memset(uip_reassbitmap, sizeof(uip_reassbitmap), 0);
++ /* First, check if the sequence number of the incoming packet is
++ what we're expecting next. If not, we send out an ACK with the
++ correct numbers in. */
++ if(uip_len > 0 &&
++ (BUF->seqno[0] != uip_connr->rcv_nxt[0] ||
++ BUF->seqno[1] != uip_connr->rcv_nxt[1] ||
++ BUF->seqno[2] != uip_connr->rcv_nxt[2] ||
++ BUF->seqno[3] != uip_connr->rcv_nxt[3])) {
++ goto tcp_send_ack;
+ }
+
-+ /* Check if the incoming fragment matches the one currently present
-+ in the reasembly buffer. If so, we proceed with copying the
-+ fragment into the buffer. */
-+ if(BUF->srcipaddr[0] == FBUF->srcipaddr[0] &&
-+ BUF->srcipaddr[1] == FBUF->srcipaddr[1] &&
-+ BUF->destipaddr[0] == FBUF->destipaddr[0] &&
-+ BUF->destipaddr[1] == FBUF->destipaddr[1] &&
-+ BUF->ipid[0] == FBUF->ipid[0] &&
-+ BUF->ipid[1] == FBUF->ipid[1]) {
-+
-+ len = (BUF->len[0] << 8) + BUF->len[1] - (BUF->vhl & 0x0f) * 4;
-+ offset = (((BUF->ipoffset[0] & 0x3f) << 8) + BUF->ipoffset[1]) * 8;
++ /* Next, check if the incoming segment acknowledges any outstanding
++ data. If so, we update the sequence number, reset the length of
++ the outstanding data, calculate RTT estimations, and reset the
++ retransmission timer. */
++ if((BUF->flags & TCP_ACK) && uip_outstanding(uip_connr)) {
++ uip_add32(uip_connr->snd_nxt, uip_connr->len);
++ if(BUF->ackno[0] == uip_acc32[0] &&
++ BUF->ackno[1] == uip_acc32[1] &&
++ BUF->ackno[2] == uip_acc32[2] &&
++ BUF->ackno[3] == uip_acc32[3]) {
++ /* Update sequence number. */
++ uip_connr->snd_nxt[0] = uip_acc32[0];
++ uip_connr->snd_nxt[1] = uip_acc32[1];
++ uip_connr->snd_nxt[2] = uip_acc32[2];
++ uip_connr->snd_nxt[3] = uip_acc32[3];
++
+
-+ /* If the offset or the offset + fragment length overflows the
-+ reassembly buffer, we discard the entire packet. */
-+ if(offset > UIP_REASS_BUFSIZE ||
-+ offset + len > UIP_REASS_BUFSIZE) {
-+ uip_reasstmr = 0;
-+ goto nullreturn;
-+ }
++ /* Do RTT estimation, unless we have done retransmissions. */
++ if(uip_connr->nrtx == 0) {
++ signed char m;
++ m = uip_connr->rto - uip_connr->timer;
++ /* This is taken directly from VJs original code in his paper */
++ m = m - (uip_connr->sa >> 3);
++ uip_connr->sa += m;
++ if(m < 0) {
++ m = -m;
++ }
++ m = m - (uip_connr->sv >> 2);
++ uip_connr->sv += m;
++ uip_connr->rto = (uip_connr->sa >> 3) + uip_connr->sv;
+
-+ /* Copy the fragment into the reassembly buffer, at the right
-+ offset. */
-+ memcpy(&uip_reassbuf[IP_HLEN + offset],
-+ (char *)BUF + (int)((BUF->vhl & 0x0f) * 4),
-+ len);
-+
-+ /* Update the bitmap. */
-+ if(offset / (8 * 8) == (offset + len) / (8 * 8)) {
-+ /* If the two endpoints are in the same byte, we only update
-+ that byte. */
-+
-+ uip_reassbitmap[offset / (8 * 8)] |=
-+ bitmap_bits[(offset / 8 ) & 7] &
-+ ~bitmap_bits[((offset + len) / 8 ) & 7];
-+ } else {
-+ /* If the two endpoints are in different bytes, we update the
-+ bytes in the endpoints and fill the stuff inbetween with
-+ 0xff. */
-+ uip_reassbitmap[offset / (8 * 8)] |=
-+ bitmap_bits[(offset / 8 ) & 7];
-+ for(i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) {
-+ uip_reassbitmap[i] = 0xff;
-+ }
-+ uip_reassbitmap[(offset + len) / (8 * 8)] |=
-+ ~bitmap_bits[((offset + len) / 8 ) & 7];
++ }
++ /* Set the acknowledged flag. */
++ uip_flags = UIP_ACKDATA;
++ /* Reset the retransmission timer. */
++ uip_connr->timer = uip_connr->rto;
+ }
+
-+ /* If this fragment has the More Fragments flag set to zero, we
-+ know that this is the last fragment, so we can calculate the
-+ size of the entire packet. We also set the
-+ IP_REASS_FLAG_LASTFRAG flag to indicate that we have received
-+ the final fragment. */
++ }
+
-+ if((BUF->ipoffset[0] & IP_MF) == 0) {
-+ uip_reassflags |= UIP_REASS_FLAG_LASTFRAG;
-+ uip_reasslen = offset + len;
-+ }
-+
-+ /* Finally, we check if we have a full packet in the buffer. We do
-+ this by checking if we have the last fragment and if all bits
-+ in the bitmap are set. */
-+ if(uip_reassflags & UIP_REASS_FLAG_LASTFRAG) {
-+ /* Check all bytes up to and including all but the last byte in
-+ the bitmap. */
-+ for(i = 0; i < uip_reasslen / (8 * 8) - 1; ++i) {
-+ if(uip_reassbitmap[i] != 0xff) {
-+ goto nullreturn;
-+ }
-+ }
-+ /* Check the last byte in the bitmap. It should contain just the
-+ right amount of bits. */
-+ if(uip_reassbitmap[uip_reasslen / (8 * 8)] !=
-+ (u8_t)~bitmap_bits[uip_reasslen / 8 & 7]) {
-+ goto nullreturn;
++ /* Do different things depending on in what state the connection is. */
++ switch(uip_connr->tcpstateflags & TS_MASK) {
++ /* CLOSED and LISTEN are not handled here. CLOSE_WAIT is not
++ implemented, since we force the application to close when the
++ peer sends a FIN (hence the application goes directly from
++ ESTABLISHED to LAST_ACK). */
++ case SYN_RCVD:
++ /* In SYN_RCVD we have sent out a SYNACK in response to a SYN, and
++ we are waiting for an ACK that acknowledges the data we sent
++ out the last time. Therefore, we want to have the UIP_ACKDATA
++ flag set. If so, we enter the ESTABLISHED state. */
++ if(uip_flags & UIP_ACKDATA) {
++ uip_connr->tcpstateflags = ESTABLISHED;
++ uip_flags = UIP_CONNECTED;
++ uip_connr->len = 0;
++ if(uip_len > 0) {
++ uip_flags |= UIP_NEWDATA;
++ uip_add_rcv_nxt(uip_len);
+ }
++ uip_slen = 0;
++ UIP_APPCALL();
++ goto appsend;
++ }
++ goto drop;
++#if UIP_ACTIVE_OPEN
++ case SYN_SENT:
++ /* In SYN_SENT, we wait for a SYNACK that is sent in response to
++ our SYN. The rcv_nxt is set to sequence number in the SYNACK
++ plus one, and we send an ACK. We move into the ESTABLISHED
++ state. */
++ if((uip_flags & UIP_ACKDATA) &&
++ BUF->flags == (TCP_SYN | TCP_ACK)) {
+
-+ /* If we have come this far, we have a full packet in the
-+ buffer, so we allocate a pbuf and copy the packet into it. We
-+ also reset the timer. */
-+ uip_reasstmr = 0;
-+ memcpy(BUF, FBUF, uip_reasslen);
-+
-+ /* Pretend to be a "normal" (i.e., not fragmented) IP packet
-+ from now on. */
-+ BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
-+ BUF->len[0] = uip_reasslen >> 8;
-+ BUF->len[1] = uip_reasslen & 0xff;
-+ BUF->ipchksum = 0;
-+ BUF->ipchksum = ~(uip_ipchksum());
++ /* Parse the TCP MSS option, if present. */
++ if((BUF->tcpoffset & 0xf0) > 0x50) {
++ for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
++ opt = uip_buf[40 + UIP_LLH_LEN + c];
++ if(opt == 0x00) {
++ /* End of options. */
++ break;
++ } else if(opt == 0x01) {
++ ++c;
++ /* NOP option. */
++ } else if(opt == 0x02 &&
++ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0x04) {
++ /* An MSS option with the right option length. */
++ tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
++ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c];
++ uip_connr->initialmss =
++ uip_connr->mss = tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
+
-+ return uip_reasslen;
++ /* And we are done processing options. */
++ break;
++ } else {
++ /* All other options have a length field, so that we easily
++ can skip past them. */
++ if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
++ /* If the length field is zero, the options are malformed
++ and we don't process them further. */
++ break;
++ }
++ c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
++ }
++ }
++ }
++ uip_connr->tcpstateflags = ESTABLISHED;
++ uip_connr->rcv_nxt[0] = BUF->seqno[0];
++ uip_connr->rcv_nxt[1] = BUF->seqno[1];
++ uip_connr->rcv_nxt[2] = BUF->seqno[2];
++ uip_connr->rcv_nxt[3] = BUF->seqno[3];
++ uip_add_rcv_nxt(1);
++ uip_flags = UIP_CONNECTED | UIP_NEWDATA;
++ uip_connr->len = 0;
++ uip_len = 0;
++ uip_slen = 0;
++ UIP_APPCALL();
++ goto appsend;
+ }
-+ }
++ goto reset;
++#endif /* UIP_ACTIVE_OPEN */
++
++ case ESTABLISHED:
++ /* In the ESTABLISHED state, we call upon the application to feed
++ data into the uip_buf. If the UIP_ACKDATA flag is set, the
++ application should put new data into the buffer, otherwise we are
++ retransmitting an old segment, and the application should put that
++ data into the buffer.
+
-+ nullreturn:
-+ return 0;
-+}
-+#endif /* UIP_REASSEMBL */
-+/*-----------------------------------------------------------------------------------*/
-+static void
-+uip_add_rcv_nxt(unsigned short int n)
-+{
-+ uip_add32(uip_conn->rcv_nxt, n);
-+ uip_conn->rcv_nxt[0] = uip_acc32[0];
-+ uip_conn->rcv_nxt[1] = uip_acc32[1];
-+ uip_conn->rcv_nxt[2] = uip_acc32[2];
-+ uip_conn->rcv_nxt[3] = uip_acc32[3];
-+}
-+/*-----------------------------------------------------------------------------------*/
-+void
-+uip_process(u8_t flag)
-+{
-+ register struct uip_conn *uip_connr = uip_conn;
-+
-+ uip_appdata = &uip_buf[40 + UIP_LLH_LEN];
++ If the incoming packet is a FIN, we should close the connection on
++ this side as well, and we send out a FIN and enter the LAST_ACK
++ state. We require that there is no outstanding data; otherwise the
++ sequence numbers will be screwed up. */
+
-+
-+ /* Check if we were invoked because of the perodic timer fireing. */
-+ if(flag == UIP_TIMER) {
-+#if UIP_REASSEMBLY
-+ if(uip_reasstmr != 0) {
-+ --uip_reasstmr;
-+ }
-+#endif /* UIP_REASSEMBLY */
-+ /* Increase the initial sequence number. */
-+ if(++iss[3] == 0) {
-+ if(++iss[2] == 0) {
-+ if(++iss[1] == 0) {
-+ ++iss[0];
-+ }
++ if(BUF->flags & TCP_FIN) {
++ if(uip_outstanding(uip_connr)) {
++ goto drop;
+ }
-+ }
-+ uip_len = 0;
-+ if(uip_connr->tcpstateflags == TIME_WAIT ||
-+ uip_connr->tcpstateflags == FIN_WAIT_2) {
-+ ++(uip_connr->timer);
-+ if(uip_connr->timer == UIP_TIME_WAIT_TIMEOUT) {
-+ uip_connr->tcpstateflags = CLOSED;
++ uip_add_rcv_nxt(1 + uip_len);
++ uip_flags = UIP_CLOSE;
++ if(uip_len > 0) {
++ uip_flags |= UIP_NEWDATA;
+ }
-+ } else if(uip_connr->tcpstateflags != CLOSED) {
-+ /* If the connection has outstanding data, we increase the
-+ connection's timer and see if it has reached the RTO value
-+ in which case we retransmit. */
-+ if(uip_outstanding(uip_connr)) {
-+ if(uip_connr->timer-- == 0) {
-+ if(uip_connr->nrtx == UIP_MAXRTX ||
-+ ((uip_connr->tcpstateflags == SYN_SENT ||
-+ uip_connr->tcpstateflags == SYN_RCVD) &&
-+ uip_connr->nrtx == UIP_MAXSYNRTX)) {
-+ uip_connr->tcpstateflags = CLOSED;
-+
-+ /* We call UIP_APPCALL() with uip_flags set to
-+ UIP_TIMEDOUT to inform the application that the
-+ connection has timed out. */
-+ uip_flags = UIP_TIMEDOUT;
-+ UIP_APPCALL();
-+
-+ /* We also send a reset packet to the remote host. */
-+ BUF->flags = TCP_RST | TCP_ACK;
-+ goto tcp_send_nodata;
-+ }
++ UIP_APPCALL();
++ uip_connr->len = 1;
++ uip_connr->tcpstateflags = LAST_ACK;
++ uip_connr->nrtx = 0;
++ tcp_send_finack:
++ BUF->flags = TCP_FIN | TCP_ACK;
++ goto tcp_send_nodata;
++ }
+
-+ /* Exponential backoff. */
-+ uip_connr->timer = UIP_RTO << (uip_connr->nrtx > 4?
-+ 4:
-+ uip_connr->nrtx);
-+ ++(uip_connr->nrtx);
-+
-+ /* Ok, so we need to retransmit. We do this differently
-+ depending on which state we are in. In ESTABLISHED, we
-+ call upon the application so that it may prepare the
-+ data for the retransmit. In SYN_RCVD, we resend the
-+ SYNACK that we sent earlier and in LAST_ACK we have to
-+ retransmit our FINACK. */
-+ UIP_STAT(++uip_stat.tcp.rexmit);
-+ switch(uip_connr->tcpstateflags & TS_MASK) {
-+ case SYN_RCVD:
-+ /* In the SYN_RCVD state, we should retransmit our
-+ SYNACK. */
-+ goto tcp_send_synack;
-+
-+#if UIP_ACTIVE_OPEN
-+ case SYN_SENT:
-+ /* In the SYN_SENT state, we retransmit out SYN. */
-+ BUF->flags = 0;
-+ goto tcp_send_syn;
-+#endif /* UIP_ACTIVE_OPEN */
-+
-+ case ESTABLISHED:
-+ /* In the ESTABLISHED state, we call upon the application
-+ to do the actual retransmit after which we jump into
-+ the code for sending out the packet (the apprexmit
-+ label). */
-+ uip_len = 0;
-+ uip_slen = 0;
-+ uip_flags = UIP_REXMIT;
-+ UIP_APPCALL();
-+ goto apprexmit;
-+
-+ case FIN_WAIT_1:
-+ case CLOSING:
-+ case LAST_ACK:
-+ /* In all these states we should retransmit a FINACK. */
-+ goto tcp_send_finack;
-+
-+ }
-+ }
-+ } else if((uip_connr->tcpstateflags & TS_MASK) == ESTABLISHED) {
-+ /* If there was no need for a retransmission, we poll the
-+ application for new data. */
-+ uip_len = 0;
-+ uip_slen = 0;
-+ uip_flags = UIP_POLL;
-+ UIP_APPCALL();
-+ goto appsend;
++ /* Check the URG flag. If this is set, the segment carries urgent
++ data that we must pass to the application. */
++ if(BUF->flags & TCP_URG) {
++#if UIP_URGDATA > 0
++ uip_urglen = (BUF->urgp[0] << 8) | BUF->urgp[1];
++ if(uip_urglen > uip_len) {
++ /* There is more urgent data in the next segment to come. */
++ uip_urglen = uip_len;
+ }
-+ }
-+ goto drop;
-+ }
-+#if UIP_UDP
-+ if(flag == UIP_UDP_TIMER) {
-+ if(uip_udp_conn->lport != 0) {
-+ uip_appdata = &uip_buf[UIP_LLH_LEN + 28];
-+ uip_len = uip_slen = 0;
-+ uip_flags = UIP_POLL;
-+ UIP_UDP_APPCALL();
-+ goto udp_send;
++ uip_add_rcv_nxt(uip_urglen);
++ uip_len -= uip_urglen;
++ uip_urgdata = uip_appdata;
++ uip_appdata += uip_urglen;
+ } else {
-+ goto drop;
++ uip_urglen = 0;
++#endif /* UIP_URGDATA > 0 */
++ uip_appdata += (BUF->urgp[0] << 8) | BUF->urgp[1];
++ uip_len -= (BUF->urgp[0] << 8) | BUF->urgp[1];
++ }
++
++
++ /* If uip_len > 0 we have TCP data in the packet, and we flag this
++ by setting the UIP_NEWDATA flag and update the sequence number
++ we acknowledge. If the application has stopped the dataflow
++ using uip_stop(), we must not accept any data packets from the
++ remote host. */
++ if(uip_len > 0 && !(uip_connr->tcpstateflags & UIP_STOPPED)) {
++ uip_flags |= UIP_NEWDATA;
++ uip_add_rcv_nxt(uip_len);
+ }
-+ }
-+#endif
+
-+ /* This is where the input processing starts. */
-+ UIP_STAT(++uip_stat.ip.recv);
++ /* Check if the available buffer space advertised by the other end
++ is smaller than the initial MSS for this connection. If so, we
++ set the current MSS to the window size to ensure that the
++ application does not send more data than the other end can
++ handle.
+
++ If the remote host advertises a zero window, we set the MSS to
++ the initial MSS so that the application will send an entire MSS
++ of data. This data will not be acknowledged by the receiver,
++ and the application will retransmit it. This is called the
++ "persistent timer" and uses the retransmission mechanim.
++ */
++ tmp16 = ((unsigned short int)BUF->wnd[0] << 8) + (unsigned short int)BUF->wnd[1];
++ if(tmp16 > uip_connr->initialmss ||
++ tmp16 == 0) {
++ tmp16 = uip_connr->initialmss;
++ }
++ uip_connr->mss = tmp16;
+
-+ /* Start of IPv4 input header processing code. */
-+
-+ /* Check validity of the IP header. */
-+ if(BUF->vhl != 0x45) { /* IP version and header length. */
-+ UIP_STAT(++uip_stat.ip.drop);
-+ UIP_STAT(++uip_stat.ip.vhlerr);
-+ UIP_LOG("ip: invalid version or header length.");
-+ goto drop;
-+ }
-+
-+ /* Check the size of the packet. If the size reported to us in
-+ uip_len doesn't match the size reported in the IP header, there
-+ has been a transmission error and we drop the packet. */
-+
-+ if(BUF->len[0] != (uip_len >> 8)) { /* IP length, high byte. */
-+ uip_len = (uip_len & 0xff) | (BUF->len[0] << 8);
-+ }
-+ if(BUF->len[1] != (uip_len & 0xff)) { /* IP length, low byte. */
-+ uip_len = (uip_len & 0xff00) | BUF->len[1];
-+ }
++ /* If this packet constitutes an ACK for outstanding data (flagged
++ by the UIP_ACKDATA flag, we should call the application since it
++ might want to send more data. If the incoming packet had data
++ from the peer (as flagged by the UIP_NEWDATA flag), the
++ application must also be notified.
+
-+ /* Check the fragment flag. */
-+ if((BUF->ipoffset[0] & 0x3f) != 0 ||
-+ BUF->ipoffset[1] != 0) {
-+#if UIP_REASSEMBLY
-+ uip_len = uip_reass();
-+ if(uip_len == 0) {
-+ goto drop;
-+ }
-+#else
-+ UIP_STAT(++uip_stat.ip.drop);
-+ UIP_STAT(++uip_stat.ip.fragerr);
-+ UIP_LOG("ip: fragment dropped.");
-+ goto drop;
-+#endif /* UIP_REASSEMBLY */
-+ }
++ When the application is called, the global variable uip_len
++ contains the length of the incoming data. The application can
++ access the incoming data through the global pointer
++ uip_appdata, which usually points 40 bytes into the uip_buf
++ array.
++
++ If the application wishes to send any data, this data should be
++ put into the uip_appdata and the length of the data should be
++ put into uip_len. If the application don't have any data to
++ send, uip_len must be set to 0. */
++ if(uip_flags & (UIP_NEWDATA | UIP_ACKDATA)) {
++ uip_slen = 0;
++ UIP_APPCALL();
+
-+ /* If we are configured to use ping IP address configuration and
-+ hasn't been assigned an IP address yet, we accept all ICMP
-+ packets. */
-+#if UIP_PINGADDRCONF
-+ if((uip_hostaddr[0] | uip_hostaddr[1]) == 0) {
-+ if(BUF->proto == UIP_PROTO_ICMP) {
-+ UIP_LOG("ip: possible ping config packet received.");
-+ goto icmp_input;
-+ } else {
-+ UIP_LOG("ip: packet dropped since no address assigned.");
-+ goto drop;
-+ }
-+ }
-+#endif /* UIP_PINGADDRCONF */
-+
-+ /* Check if the packet is destined for our IP address. */
-+ if(BUF->destipaddr[0] != uip_hostaddr[0]) {
-+ UIP_STAT(++uip_stat.ip.drop);
-+ UIP_LOG("ip: packet not for us.");
-+ goto drop;
-+ }
-+ if(BUF->destipaddr[1] != uip_hostaddr[1]) {
-+ UIP_STAT(++uip_stat.ip.drop);
-+ UIP_LOG("ip: packet not for us.");
-+ goto drop;
-+ }
++ appsend:
++
++ if(uip_flags & UIP_ABORT) {
++ uip_slen = 0;
++ uip_connr->tcpstateflags = CLOSED;
++ BUF->flags = TCP_RST | TCP_ACK;
++ goto tcp_send_nodata;
++ }
+
-+ if(uip_ipchksum() != 0xffff) { /* Compute and check the IP header
-+ checksum. */
-+ UIP_STAT(++uip_stat.ip.drop);
-+ UIP_STAT(++uip_stat.ip.chkerr);
-+ UIP_LOG("ip: bad checksum.");
-+ goto drop;
-+ }
++ if(uip_flags & UIP_CLOSE) {
++ uip_slen = 0;
++ uip_connr->len = 1;
++ uip_connr->tcpstateflags = FIN_WAIT_1;
++ uip_connr->nrtx = 0;
++ BUF->flags = TCP_FIN | TCP_ACK;
++ goto tcp_send_nodata;
++ }
+
-+ if(BUF->proto == UIP_PROTO_TCP) /* Check for TCP packet. If so, jump
-+ to the tcp_input label. */
-+ goto tcp_input;
++ /* If uip_slen > 0, the application has data to be sent. */
++ if(uip_slen > 0) {
+
-+#if UIP_UDP
-+ if(BUF->proto == UIP_PROTO_UDP)
-+ goto udp_input;
-+#endif /* UIP_UDP */
++ /* If the connection has acknowledged data, the contents of
++ the ->len variable should be discarded. */
++ if((uip_flags & UIP_ACKDATA) != 0) {
++ uip_connr->len = 0;
++ }
+
-+ if(BUF->proto != UIP_PROTO_ICMP) { /* We only allow ICMP packets from
-+ here. */
-+ UIP_STAT(++uip_stat.ip.drop);
-+ UIP_STAT(++uip_stat.ip.protoerr);
-+ UIP_LOG("ip: neither tcp nor icmp.");
-+ goto drop;
-+ }
-+
-+ //icmp_input:
-+ UIP_STAT(++uip_stat.icmp.recv);
-+
-+ /* ICMP echo (i.e., ping) processing. This is simple, we only change
-+ the ICMP type from ECHO to ECHO_REPLY and adjust the ICMP
-+ checksum before we return the packet. */
-+ if(ICMPBUF->type != ICMP_ECHO) {
-+ UIP_STAT(++uip_stat.icmp.drop);
-+ UIP_STAT(++uip_stat.icmp.typeerr);
-+ UIP_LOG("icmp: not icmp echo.");
-+ goto drop;
-+ }
++ /* If the ->len variable is non-zero the connection has
++ already data in transit and cannot send anymore right
++ now. */
++ if(uip_connr->len == 0) {
+
-+ /* If we are configured to use ping IP address assignment, we use
-+ the destination IP address of this ping packet and assign it to
-+ ourself. */
-+#if UIP_PINGADDRCONF
-+ if((uip_hostaddr[0] | uip_hostaddr[1]) == 0) {
-+ uip_hostaddr[0] = BUF->destipaddr[0];
-+ uip_hostaddr[1] = BUF->destipaddr[1];
-+ }
-+#endif /* UIP_PINGADDRCONF */
-+
-+ ICMPBUF->type = ICMP_ECHO_REPLY;
-+
-+ if(ICMPBUF->icmpchksum >= HTONS(0xffff - (ICMP_ECHO << 8))) {
-+ ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8) + 1;
-+ } else {
-+ ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8);
-+ }
-+
-+ /* Swap IP addresses. */
-+ tmp16 = BUF->destipaddr[0];
-+ BUF->destipaddr[0] = BUF->srcipaddr[0];
-+ BUF->srcipaddr[0] = tmp16;
-+ tmp16 = BUF->destipaddr[1];
-+ BUF->destipaddr[1] = BUF->srcipaddr[1];
-+ BUF->srcipaddr[1] = tmp16;
++ /* The application cannot send more than what is allowed by
++ the mss (the minumum of the MSS and the available
++ window). */
++ if(uip_slen > uip_connr->mss) {
++ uip_slen = uip_connr->mss;
++ }
+
-+ UIP_STAT(++uip_stat.icmp.sent);
-+ goto send;
++ /* Remember how much data we send out now so that we know
++ when everything has been acknowledged. */
++ uip_connr->len = uip_slen;
++ } else {
+
-+ /* End of IPv4 input header processing code. */
-+
++ /* If the application already had unacknowledged data, we
++ make sure that the application does not send (i.e.,
++ retransmit) out more than it previously sent out. */
++ uip_slen = uip_connr->len;
++ }
++ } else {
++ uip_connr->len = 0;
++ }
++ uip_connr->nrtx = 0;
++ apprexmit:
++ uip_appdata = uip_sappdata;
+
-+#if UIP_UDP
-+ /* UDP input processing. */
-+ udp_input:
-+ /* UDP processing is really just a hack. We don't do anything to the
-+ UDP/IP headers, but let the UDP application do all the hard
-+ work. If the application sets uip_slen, it has a packet to
-+ send. */
-+#if UIP_UDP_CHECKSUMS
-+ if(uip_udpchksum() != 0xffff) {
-+ UIP_STAT(++uip_stat.udp.drop);
-+ UIP_STAT(++uip_stat.udp.chkerr);
-+ UIP_LOG("udp: bad checksum.");
++ /* If the application has data to be sent, or if the incoming
++ packet had new data in it, we must send out a packet. */
++ if(uip_slen > 0 && uip_connr->len > 0) {
++ /* Add the length of the IP and TCP headers. */
++ uip_len = uip_connr->len + UIP_TCPIP_HLEN;
++ /* We always set the ACK flag in response packets. */
++ BUF->flags = TCP_ACK | TCP_PSH;
++ /* Send the packet. */
++ goto tcp_send_noopts;
++ }
++ /* If there is no data to send, just send out a pure ACK if
++ there is newdata. */
++ if(uip_flags & UIP_NEWDATA) {
++ uip_len = UIP_TCPIP_HLEN;
++ BUF->flags = TCP_ACK;
++ goto tcp_send_noopts;
++ }
++ }
++ goto drop;
++ case LAST_ACK:
++ /* We can close this connection if the peer has acknowledged our
++ FIN. This is indicated by the UIP_ACKDATA flag. */
++ if(uip_flags & UIP_ACKDATA) {
++ uip_connr->tcpstateflags = CLOSED;
++ uip_flags = UIP_CLOSE;
++ UIP_APPCALL();
++ }
++ break;
++
++ case FIN_WAIT_1:
++ /* The application has closed the connection, but the remote host
++ hasn't closed its end yet. Thus we do nothing but wait for a
++ FIN from the other side. */
++ if(uip_len > 0) {
++ uip_add_rcv_nxt(uip_len);
++ }
++ if(BUF->flags & TCP_FIN) {
++ if(uip_flags & UIP_ACKDATA) {
++ uip_connr->tcpstateflags = TIME_WAIT;
++ uip_connr->timer = 0;
++ uip_connr->len = 0;
++ } else {
++ uip_connr->tcpstateflags = CLOSING;
++ }
++ uip_add_rcv_nxt(1);
++ uip_flags = UIP_CLOSE;
++ UIP_APPCALL();
++ goto tcp_send_ack;
++ } else if(uip_flags & UIP_ACKDATA) {
++ uip_connr->tcpstateflags = FIN_WAIT_2;
++ uip_connr->len = 0;
++ goto drop;
++ }
++ if(uip_len > 0) {
++ goto tcp_send_ack;
++ }
+ goto drop;
-+ }
-+#endif /* UIP_UDP_CHECKSUMS */
-+
-+ /* Demultiplex this UDP packet between the UDP "connections". */
-+ for(uip_udp_conn = &uip_udp_conns[0];
-+ uip_udp_conn < &uip_udp_conns[UIP_UDP_CONNS];
-+ ++uip_udp_conn) {
-+ if(uip_udp_conn->lport != 0 &&
-+ UDPBUF->destport == uip_udp_conn->lport &&
-+ (uip_udp_conn->rport == 0 ||
-+ UDPBUF->srcport == uip_udp_conn->rport) &&
-+ BUF->srcipaddr[0] == uip_udp_conn->ripaddr[0] &&
-+ BUF->srcipaddr[1] == uip_udp_conn->ripaddr[1]) {
-+ goto udp_found;
++
++ case FIN_WAIT_2:
++ if(uip_len > 0) {
++ uip_add_rcv_nxt(uip_len);
+ }
-+ }
-+ goto drop;
-+
-+ udp_found:
-+ uip_len = uip_len - 28;
-+ uip_appdata = &uip_buf[UIP_LLH_LEN + 28];
-+ uip_flags = UIP_NEWDATA;
-+ uip_slen = 0;
-+ UIP_UDP_APPCALL();
-+ udp_send:
-+ if(uip_slen == 0) {
-+ goto drop;
-+ }
-+ uip_len = uip_slen + 28;
++ if(BUF->flags & TCP_FIN) {
++ uip_connr->tcpstateflags = TIME_WAIT;
++ uip_connr->timer = 0;
++ uip_add_rcv_nxt(1);
++ uip_flags = UIP_CLOSE;
++ UIP_APPCALL();
++ goto tcp_send_ack;
++ }
++ if(uip_len > 0) {
++ goto tcp_send_ack;
++ }
++ goto drop;
+
-+ BUF->len[0] = (uip_len >> 8);
-+ BUF->len[1] = (uip_len & 0xff);
++ case TIME_WAIT:
++ goto tcp_send_ack;
++
++ case CLOSING:
++ if(uip_flags & UIP_ACKDATA) {
++ uip_connr->tcpstateflags = TIME_WAIT;
++ uip_connr->timer = 0;
++ }
++ }
++ goto drop;
+
-+ BUF->proto = UIP_PROTO_UDP;
+
-+ UDPBUF->udplen = HTONS(uip_slen + 8);
-+ UDPBUF->udpchksum = 0;
-+#if UIP_UDP_CHECKSUMS
-+ /* Calculate UDP checksum. */
-+ UDPBUF->udpchksum = ~(uip_udpchksum());
-+ if(UDPBUF->udpchksum == 0) {
-+ UDPBUF->udpchksum = 0xffff;
-+ }
-+#endif /* UIP_UDP_CHECKSUMS */
++ /* We jump here when we are ready to send the packet, and just want
++ to set the appropriate TCP sequence numbers in the TCP header. */
++ tcp_send_ack:
++ BUF->flags = TCP_ACK;
++ tcp_send_nodata:
++ uip_len = 40;
++ tcp_send_noopts:
++ BUF->tcpoffset = 5 << 4;
++ tcp_send:
++ /* We're done with the input processing. We are now ready to send a
++ reply. Our job is to fill in all the fields of the TCP and IP
++ headers before calculating the checksum and finally send the
++ packet. */
++ BUF->ackno[0] = uip_connr->rcv_nxt[0];
++ BUF->ackno[1] = uip_connr->rcv_nxt[1];
++ BUF->ackno[2] = uip_connr->rcv_nxt[2];
++ BUF->ackno[3] = uip_connr->rcv_nxt[3];
++
++ BUF->seqno[0] = uip_connr->snd_nxt[0];
++ BUF->seqno[1] = uip_connr->snd_nxt[1];
++ BUF->seqno[2] = uip_connr->snd_nxt[2];
++ BUF->seqno[3] = uip_connr->snd_nxt[3];
+
-+ BUF->srcport = uip_udp_conn->lport;
-+ BUF->destport = uip_udp_conn->rport;
++ BUF->proto = UIP_PROTO_TCP;
++
++ BUF->srcport = uip_connr->lport;
++ BUF->destport = uip_connr->rport;
+
+ BUF->srcipaddr[0] = uip_hostaddr[0];
+ BUF->srcipaddr[1] = uip_hostaddr[1];
-+ BUF->destipaddr[0] = uip_udp_conn->ripaddr[0];
-+ BUF->destipaddr[1] = uip_udp_conn->ripaddr[1];
++ BUF->destipaddr[0] = uip_connr->ripaddr[0];
++ BUF->destipaddr[1] = uip_connr->ripaddr[1];
+
-+ uip_appdata = &uip_buf[UIP_LLH_LEN + 40];
-+ goto ip_send_nolen;
-+#endif /* UIP_UDP */
-+
-+ /* TCP input processing. */
-+ tcp_input:
-+ UIP_STAT(++uip_stat.tcp.recv);
+
-+ /* Start of TCP input header processing code. */
-+
-+ if(uip_tcpchksum() != 0xffff) { /* Compute and check the TCP
-+ checksum. */
-+ UIP_STAT(++uip_stat.tcp.drop);
-+ UIP_STAT(++uip_stat.tcp.chkerr);
-+ UIP_LOG("tcp: bad checksum.");
-+ goto drop;
-+ }
-+
-+ /* Demultiplex this segment. */
-+ /* First check any active connections. */
-+ for(uip_connr = &uip_conns[0]; uip_connr < &uip_conns[UIP_CONNS]; ++uip_connr) {
-+ if(uip_connr->tcpstateflags != CLOSED &&
-+ BUF->destport == uip_connr->lport &&
-+ BUF->srcport == uip_connr->rport &&
-+ BUF->srcipaddr[0] == uip_connr->ripaddr[0] &&
-+ BUF->srcipaddr[1] == uip_connr->ripaddr[1]) {
-+ goto found;
-+ }
++ if(uip_connr->tcpstateflags & UIP_STOPPED) {
++ /* If the connection has issued uip_stop(), we advertise a zero
++ window so that the remote host will stop sending data. */
++ BUF->wnd[0] = BUF->wnd[1] = 0;
++ } else {
++ BUF->wnd[0] = ((UIP_RECEIVE_WINDOW) >> 8);
++ BUF->wnd[1] = ((UIP_RECEIVE_WINDOW) & 0xff);
+ }
+
-+ /* If we didn't find and active connection that expected the packet,
-+ either this packet is an old duplicate, or this is a SYN packet
-+ destined for a connection in LISTEN. If the SYN flag isn't set,
-+ it is an old packet and we send a RST. */
-+ if((BUF->flags & TCP_CTL) != TCP_SYN)
-+ goto reset;
-+
-+ tmp16 = BUF->destport;
-+ /* Next, check listening connections. */
-+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
-+ if(tmp16 == uip_listenports[c])
-+ goto found_listen;
-+ }
-+
-+ /* No matching connection found, so we send a RST packet. */
-+ UIP_STAT(++uip_stat.tcp.synrst);
-+ reset:
++ tcp_send_noconn:
+
-+ /* We do not send resets in response to resets. */
-+ if(BUF->flags & TCP_RST)
-+ goto drop;
++ BUF->len[0] = (uip_len >> 8);
++ BUF->len[1] = (uip_len & 0xff);
+
-+ UIP_STAT(++uip_stat.tcp.rst);
++ /* Calculate TCP checksum. */
++ BUF->tcpchksum = 0;
++ BUF->tcpchksum = ~(uip_tcpchksum());
+
-+ BUF->flags = TCP_RST | TCP_ACK;
-+ uip_len = 40;
-+ BUF->tcpoffset = 5 << 4;
++ //ip_send_nolen:
+
-+ /* Flip the seqno and ackno fields in the TCP header. */
-+ c = BUF->seqno[3];
-+ BUF->seqno[3] = BUF->ackno[3];
-+ BUF->ackno[3] = c;
-+
-+ c = BUF->seqno[2];
-+ BUF->seqno[2] = BUF->ackno[2];
-+ BUF->ackno[2] = c;
-+
-+ c = BUF->seqno[1];
-+ BUF->seqno[1] = BUF->ackno[1];
-+ BUF->ackno[1] = c;
++ BUF->vhl = 0x45;
++ BUF->tos = 0;
++ BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
++ BUF->ttl = UIP_TTL;
++ ++ipid;
++ BUF->ipid[0] = ipid >> 8;
++ BUF->ipid[1] = ipid & 0xff;
+
-+ c = BUF->seqno[0];
-+ BUF->seqno[0] = BUF->ackno[0];
-+ BUF->ackno[0] = c;
++ /* Calculate IP checksum. */
++ BUF->ipchksum = 0;
++ BUF->ipchksum = ~(uip_ipchksum());
+
-+ /* We also have to increase the sequence number we are
-+ acknowledging. If the least significant byte overflowed, we need
-+ to propagate the carry to the other bytes as well. */
-+ if(++BUF->ackno[3] == 0) {
-+ if(++BUF->ackno[2] == 0) {
-+ if(++BUF->ackno[1] == 0) {
-+ ++BUF->ackno[0];
-+ }
-+ }
-+ }
-+
-+ /* Swap port numbers. */
-+ tmp16 = BUF->srcport;
-+ BUF->srcport = BUF->destport;
-+ BUF->destport = tmp16;
-+
-+ /* Swap IP addresses. */
-+ tmp16 = BUF->destipaddr[0];
-+ BUF->destipaddr[0] = BUF->srcipaddr[0];
-+ BUF->srcipaddr[0] = tmp16;
-+ tmp16 = BUF->destipaddr[1];
-+ BUF->destipaddr[1] = BUF->srcipaddr[1];
-+ BUF->srcipaddr[1] = tmp16;
++ UIP_STAT(++uip_stat.tcp.sent);
++ send:
++ UIP_STAT(++uip_stat.ip.sent);
++ /* Return and let the caller do the actual transmission. */
++ return;
++ drop:
++ uip_len = 0;
++ return;
++}
++/*-----------------------------------------------------------------------------------*/
++/*unsigned short int
++htons(unsigned short int val)
++{
++ return HTONS(val);
++}*/
++/*-----------------------------------------------------------------------------------*/
++/** @} */
+--- /dev/null
++++ b/net/uip-0.9/uip.h
+@@ -0,0 +1,1066 @@
++/**
++ * \addtogroup uip
++ * @{
++ */
+
-+
-+ /* And send out the RST packet! */
-+ goto tcp_send_noconn;
++/**
++ * \file
++ * Header file for the uIP TCP/IP stack.
++ * \author Adam Dunkels <adam@dunkels.com>
++ *
++ * The uIP TCP/IP stack header file contains definitions for a number
++ * of C macros that are used by uIP programs as well as internal uIP
++ * structures, TCP/IP header structures and function declarations.
++ *
++ */
+
-+ /* This label will be jumped to if we matched the incoming packet
-+ with a connection in LISTEN. In that case, we should create a new
-+ connection and send a SYNACK in return. */
-+ found_listen:
-+ /* First we check if there are any connections avaliable. Unused
-+ connections are kept in the same table as used connections, but
-+ unused ones have the tcpstate set to CLOSED. Also, connections in
-+ TIME_WAIT are kept track of and we'll use the oldest one if no
-+ CLOSED connections are found. Thanks to Eddie C. Dost for a very
-+ nice algorithm for the TIME_WAIT search. */
-+ uip_connr = 0;
-+ for(c = 0; c < UIP_CONNS; ++c) {
-+ if(uip_conns[c].tcpstateflags == CLOSED) {
-+ uip_connr = &uip_conns[c];
-+ break;
-+ }
-+ if(uip_conns[c].tcpstateflags == TIME_WAIT) {
-+ if(uip_connr == 0 ||
-+ uip_conns[c].timer > uip_connr->timer) {
-+ uip_connr = &uip_conns[c];
-+ }
-+ }
-+ }
+
-+ if(uip_connr == 0) {
-+ /* All connections are used already, we drop packet and hope that
-+ the remote end will retransmit the packet at a time when we
-+ have more spare connections. */
-+ UIP_STAT(++uip_stat.tcp.syndrop);
-+ UIP_LOG("tcp: found no unused connections.");
-+ goto drop;
-+ }
-+ uip_conn = uip_connr;
-+
-+ /* Fill in the necessary fields for the new connection. */
-+ uip_connr->rto = uip_connr->timer = UIP_RTO;
-+ uip_connr->sa = 0;
-+ uip_connr->sv = 4;
-+ uip_connr->nrtx = 0;
-+ uip_connr->lport = BUF->destport;
-+ uip_connr->rport = BUF->srcport;
-+ uip_connr->ripaddr[0] = BUF->srcipaddr[0];
-+ uip_connr->ripaddr[1] = BUF->srcipaddr[1];
-+ uip_connr->tcpstateflags = SYN_RCVD;
++/*
++ * Copyright (c) 2001-2003, Adam Dunkels.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote
++ * products derived from this software without specific prior
++ * written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
++ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
++ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
++ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
++ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
++ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * This file is part of the uIP TCP/IP stack.
++ *
++ * $Id: uip.h,v 1.36.2.7 2003/10/07 13:47:51 adam Exp $
++ *
++ */
++
++#ifndef __UIP_H__
++#define __UIP_H__
++#include <linux/types.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++#include <malloc.h>
++#include <common.h>
+
-+ uip_connr->snd_nxt[0] = iss[0];
-+ uip_connr->snd_nxt[1] = iss[1];
-+ uip_connr->snd_nxt[2] = iss[2];
-+ uip_connr->snd_nxt[3] = iss[3];
-+ uip_connr->len = 1;
+
-+ /* rcv_nxt should be the seqno from the incoming packet + 1. */
-+ uip_connr->rcv_nxt[3] = BUF->seqno[3];
-+ uip_connr->rcv_nxt[2] = BUF->seqno[2];
-+ uip_connr->rcv_nxt[1] = BUF->seqno[1];
-+ uip_connr->rcv_nxt[0] = BUF->seqno[0];
-+ uip_add_rcv_nxt(1);
++#include "uipopt.h"
+
-+ /* Parse the TCP MSS option, if present. */
-+ if((BUF->tcpoffset & 0xf0) > 0x50) {
-+ for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
-+ opt = uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + c];
-+ if(opt == 0x00) {
-+ /* End of options. */
-+ break;
-+ } else if(opt == 0x01) {
-+ ++c;
-+ /* NOP option. */
-+ } else if(opt == 0x02 &&
-+ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0x04) {
-+ /* An MSS option with the right option length. */
-+ tmp16 = ((unsigned short int)uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
-+ (unsigned short int)uip_buf[40 + UIP_LLH_LEN + 3 + c];
-+ uip_connr->initialmss = uip_connr->mss =
-+ tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
-+
-+ /* And we are done processing options. */
-+ break;
-+ } else {
-+ /* All other options have a length field, so that we easily
-+ can skip past them. */
-+ if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
-+ /* If the length field is zero, the options are malformed
-+ and we don't process them further. */
-+ break;
-+ }
-+ c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
-+ }
-+ }
-+ }
-+
-+ /* Our response will be a SYNACK. */
-+#if UIP_ACTIVE_OPEN
-+ tcp_send_synack:
-+ BUF->flags = TCP_ACK;
-+
-+ tcp_send_syn:
-+ BUF->flags |= TCP_SYN;
-+#else /* UIP_ACTIVE_OPEN */
-+ tcp_send_synack:
-+ BUF->flags = TCP_SYN | TCP_ACK;
-+#endif /* UIP_ACTIVE_OPEN */
-+
-+ /* We send out the TCP Maximum Segment Size option with our
-+ SYNACK. */
-+ BUF->optdata[0] = 2;
-+ BUF->optdata[1] = 4;
-+ BUF->optdata[2] = (UIP_TCP_MSS) / 256;
-+ BUF->optdata[3] = (UIP_TCP_MSS) & 255;
-+ uip_len = 44;
-+ BUF->tcpoffset = 6 << 4;
-+ goto tcp_send;
++/*-----------------------------------------------------------------------------------*/
++/* First, the functions that should be called from the
++ * system. Initialization, the periodic timer and incoming packets are
++ * handled by the following three functions.
++ */
+
-+ /* This label will be jumped to if we found an active connection. */
-+ found:
-+ uip_conn = uip_connr;
-+ uip_flags = 0;
++/**
++ * \defgroup uipconffunc uIP configuration functions
++ * @{
++ *
++ * The uIP configuration functions are used for setting run-time
++ * parameters in uIP such as IP addresses.
++ */
+
-+ /* We do a very naive form of TCP reset processing; we just accept
-+ any RST and kill our connection. We should in fact check if the
-+ sequence number of this reset is wihtin our advertised window
-+ before we accept the reset. */
-+ if(BUF->flags & TCP_RST) {
-+ uip_connr->tcpstateflags = CLOSED;
-+ UIP_LOG("tcp: got reset, aborting connection.");
-+ uip_flags = UIP_ABORT;
-+ UIP_APPCALL();
-+ goto drop;
-+ }
-+ /* Calculated the length of the data, if the application has sent
-+ any data to us. */
-+ c = (BUF->tcpoffset >> 4) << 2;
-+ /* uip_len will contain the length of the actual TCP data. This is
-+ calculated by subtracing the length of the TCP header (in
-+ c) and the length of the IP header (20 bytes). */
-+ uip_len = uip_len - c - 20;
++/**
++ * Set the IP address of this host.
++ *
++ * The IP address is represented as a 4-byte array where the first
++ * octet of the IP address is put in the first member of the 4-byte
++ * array.
++ *
++ * \param addr A pointer to a 4-byte representation of the IP address.
++ *
++ * \hideinitializer
++ */
++#define uip_sethostaddr(addr) do { uip_hostaddr[0] = addr[0]; \
++ uip_hostaddr[1] = addr[1]; } while(0)
+
-+ /* First, check if the sequence number of the incoming packet is
-+ what we're expecting next. If not, we send out an ACK with the
-+ correct numbers in. */
-+ if(uip_len > 0 &&
-+ (BUF->seqno[0] != uip_connr->rcv_nxt[0] ||
-+ BUF->seqno[1] != uip_connr->rcv_nxt[1] ||
-+ BUF->seqno[2] != uip_connr->rcv_nxt[2] ||
-+ BUF->seqno[3] != uip_connr->rcv_nxt[3])) {
-+ goto tcp_send_ack;
-+ }
++/**
++ * Get the IP address of this host.
++ *
++ * The IP address is represented as a 4-byte array where the first
++ * octet of the IP address is put in the first member of the 4-byte
++ * array.
++ *
++ * \param addr A pointer to a 4-byte array that will be filled in with
++ * the currently configured IP address.
++ *
++ * \hideinitializer
++ */
++#define uip_gethostaddr(addr) do { addr[0] = uip_hostaddr[0]; \
++ addr[1] = uip_hostaddr[1]; } while(0)
+
-+ /* Next, check if the incoming segment acknowledges any outstanding
-+ data. If so, we update the sequence number, reset the length of
-+ the outstanding data, calculate RTT estimations, and reset the
-+ retransmission timer. */
-+ if((BUF->flags & TCP_ACK) && uip_outstanding(uip_connr)) {
-+ uip_add32(uip_connr->snd_nxt, uip_connr->len);
-+ if(BUF->ackno[0] == uip_acc32[0] &&
-+ BUF->ackno[1] == uip_acc32[1] &&
-+ BUF->ackno[2] == uip_acc32[2] &&
-+ BUF->ackno[3] == uip_acc32[3]) {
-+ /* Update sequence number. */
-+ uip_connr->snd_nxt[0] = uip_acc32[0];
-+ uip_connr->snd_nxt[1] = uip_acc32[1];
-+ uip_connr->snd_nxt[2] = uip_acc32[2];
-+ uip_connr->snd_nxt[3] = uip_acc32[3];
-+
++/** @} */
+
-+ /* Do RTT estimation, unless we have done retransmissions. */
-+ if(uip_connr->nrtx == 0) {
-+ signed char m;
-+ m = uip_connr->rto - uip_connr->timer;
-+ /* This is taken directly from VJs original code in his paper */
-+ m = m - (uip_connr->sa >> 3);
-+ uip_connr->sa += m;
-+ if(m < 0) {
-+ m = -m;
-+ }
-+ m = m - (uip_connr->sv >> 2);
-+ uip_connr->sv += m;
-+ uip_connr->rto = (uip_connr->sa >> 3) + uip_connr->sv;
++/**
++ * \defgroup uipinit uIP initialization functions
++ * @{
++ *
++ * The uIP initialization functions are used for booting uIP.
++ */
++
++/**
++ * uIP initialization function.
++ *
++ * This function should be called at boot up to initilize the uIP
++ * TCP/IP stack.
++ */
++void uip_init(void);
++
++/** @} */
++
++/**
++ * \defgroup uipdevfunc uIP device driver functions
++ * @{
++ *
++ * These functions are used by a network device driver for interacting
++ * with uIP.
++ */
+
++/**
++ * Process an incoming packet.
++ *
++ * This function should be called when the device driver has received
++ * a packet from the network. The packet from the device driver must
++ * be present in the uip_buf buffer, and the length of the packet
++ * should be placed in the uip_len variable.
++ *
++ * When the function returns, there may be an outbound packet placed
++ * in the uip_buf packet buffer. If so, the uip_len variable is set to
++ * the length of the packet. If no packet is to be sent out, the
++ * uip_len variable is set to 0.
++ *
++ * The usual way of calling the function is presented by the source
++ * code below.
++ \code
++ uip_len = devicedriver_poll();
++ if(uip_len > 0) {
++ uip_input();
++ if(uip_len > 0) {
++ devicedriver_send();
++ }
++ }
++ \endcode
++ *
++ * \note If you are writing a uIP device driver that needs ARP
++ * (Address Resolution Protocol), e.g., when running uIP over
++ * Ethernet, you will need to call the uIP ARP code before calling
++ * this function:
++ \code
++ #define BUF ((struct uip_eth_hdr *)&uip_buf[0])
++ uip_len = ethernet_devicedrver_poll();
++ if(uip_len > 0) {
++ if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
++ uip_arp_ipin();
++ uip_input();
++ if(uip_len > 0) {
++ uip_arp_out();
++ ethernet_devicedriver_send();
+ }
-+ /* Set the acknowledged flag. */
-+ uip_flags = UIP_ACKDATA;
-+ /* Reset the retransmission timer. */
-+ uip_connr->timer = uip_connr->rto;
-+ }
-+
-+ }
-+
-+ /* Do different things depending on in what state the connection is. */
-+ switch(uip_connr->tcpstateflags & TS_MASK) {
-+ /* CLOSED and LISTEN are not handled here. CLOSE_WAIT is not
-+ implemented, since we force the application to close when the
-+ peer sends a FIN (hence the application goes directly from
-+ ESTABLISHED to LAST_ACK). */
-+ case SYN_RCVD:
-+ /* In SYN_RCVD we have sent out a SYNACK in response to a SYN, and
-+ we are waiting for an ACK that acknowledges the data we sent
-+ out the last time. Therefore, we want to have the UIP_ACKDATA
-+ flag set. If so, we enter the ESTABLISHED state. */
-+ if(uip_flags & UIP_ACKDATA) {
-+ uip_connr->tcpstateflags = ESTABLISHED;
-+ uip_flags = UIP_CONNECTED;
-+ uip_connr->len = 0;
++ } else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
++ uip_arp_arpin();
+ if(uip_len > 0) {
-+ uip_flags |= UIP_NEWDATA;
-+ uip_add_rcv_nxt(uip_len);
++ ethernet_devicedriver_send();
+ }
-+ uip_slen = 0;
-+ UIP_APPCALL();
-+ goto appsend;
+ }
-+ goto drop;
-+#if UIP_ACTIVE_OPEN
-+ case SYN_SENT:
-+ /* In SYN_SENT, we wait for a SYNACK that is sent in response to
-+ our SYN. The rcv_nxt is set to sequence number in the SYNACK
-+ plus one, and we send an ACK. We move into the ESTABLISHED
-+ state. */
-+ if((uip_flags & UIP_ACKDATA) &&
-+ BUF->flags == (TCP_SYN | TCP_ACK)) {
-+
-+ /* Parse the TCP MSS option, if present. */
-+ if((BUF->tcpoffset & 0xf0) > 0x50) {
-+ for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
-+ opt = uip_buf[40 + UIP_LLH_LEN + c];
-+ if(opt == 0x00) {
-+ /* End of options. */
-+ break;
-+ } else if(opt == 0x01) {
-+ ++c;
-+ /* NOP option. */
-+ } else if(opt == 0x02 &&
-+ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0x04) {
-+ /* An MSS option with the right option length. */
-+ tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
-+ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c];
-+ uip_connr->initialmss =
-+ uip_connr->mss = tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
++ \endcode
++ *
++ * \hideinitializer
++ */
++#define uip_input() uip_process(UIP_DATA)
+
-+ /* And we are done processing options. */
-+ break;
-+ } else {
-+ /* All other options have a length field, so that we easily
-+ can skip past them. */
-+ if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
-+ /* If the length field is zero, the options are malformed
-+ and we don't process them further. */
-+ break;
-+ }
-+ c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
-+ }
-+ }
-+ }
-+ uip_connr->tcpstateflags = ESTABLISHED;
-+ uip_connr->rcv_nxt[0] = BUF->seqno[0];
-+ uip_connr->rcv_nxt[1] = BUF->seqno[1];
-+ uip_connr->rcv_nxt[2] = BUF->seqno[2];
-+ uip_connr->rcv_nxt[3] = BUF->seqno[3];
-+ uip_add_rcv_nxt(1);
-+ uip_flags = UIP_CONNECTED | UIP_NEWDATA;
-+ uip_connr->len = 0;
-+ uip_len = 0;
-+ uip_slen = 0;
-+ UIP_APPCALL();
-+ goto appsend;
++/**
++ * Periodic processing for a connection identified by its number.
++ *
++ * This function does the necessary periodic processing (timers,
++ * polling) for a uIP TCP conneciton, and should be called when the
++ * periodic uIP timer goes off. It should be called for every
++ * connection, regardless of whether they are open of closed.
++ *
++ * When the function returns, it may have an outbound packet waiting
++ * for service in the uIP packet buffer, and if so the uip_len
++ * variable is set to a value larger than zero. The device driver
++ * should be called to send out the packet.
++ *
++ * The ususal way of calling the function is through a for() loop like
++ * this:
++ \code
++ for(i = 0; i < UIP_CONNS; ++i) {
++ uip_periodic(i);
++ if(uip_len > 0) {
++ devicedriver_send();
+ }
-+ goto reset;
-+#endif /* UIP_ACTIVE_OPEN */
-+
-+ case ESTABLISHED:
-+ /* In the ESTABLISHED state, we call upon the application to feed
-+ data into the uip_buf. If the UIP_ACKDATA flag is set, the
-+ application should put new data into the buffer, otherwise we are
-+ retransmitting an old segment, and the application should put that
-+ data into the buffer.
++ }
++ \endcode
++ *
++ * \note If you are writing a uIP device driver that needs ARP
++ * (Address Resolution Protocol), e.g., when running uIP over
++ * Ethernet, you will need to call the uip_arp_out() function before
++ * calling the device driver:
++ \code
++ for(i = 0; i < UIP_CONNS; ++i) {
++ uip_periodic(i);
++ if(uip_len > 0) {
++ uip_arp_out();
++ ethernet_devicedriver_send();
++ }
++ }
++ \endcode
++ *
++ * \param conn The number of the connection which is to be periodically polled.
++ *
++ * \hideinitializer
++ */
++#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \
++ uip_process(UIP_TIMER); } while (0)
+
-+ If the incoming packet is a FIN, we should close the connection on
-+ this side as well, and we send out a FIN and enter the LAST_ACK
-+ state. We require that there is no outstanding data; otherwise the
-+ sequence numbers will be screwed up. */
++/**
++ * Periodic processing for a connection identified by a pointer to its structure.
++ *
++ * Same as uip_periodic() but takes a pointer to the actual uip_conn
++ * struct instead of an integer as its argument. This function can be
++ * used to force periodic processing of a specific connection.
++ *
++ * \param conn A pointer to the uip_conn struct for the connection to
++ * be processed.
++ *
++ * \hideinitializer
++ */
++#define uip_periodic_conn(conn) do { uip_conn = conn; \
++ uip_process(UIP_TIMER); } while (0)
+
-+ if(BUF->flags & TCP_FIN) {
-+ if(uip_outstanding(uip_connr)) {
-+ goto drop;
-+ }
-+ uip_add_rcv_nxt(1 + uip_len);
-+ uip_flags = UIP_CLOSE;
-+ if(uip_len > 0) {
-+ uip_flags |= UIP_NEWDATA;
-+ }
-+ UIP_APPCALL();
-+ uip_connr->len = 1;
-+ uip_connr->tcpstateflags = LAST_ACK;
-+ uip_connr->nrtx = 0;
-+ tcp_send_finack:
-+ BUF->flags = TCP_FIN | TCP_ACK;
-+ goto tcp_send_nodata;
++#if UIP_UDP
++/**
++ * Periodic processing for a UDP connection identified by its number.
++ *
++ * This function is essentially the same as uip_prerioic(), but for
++ * UDP connections. It is called in a similar fashion as the
++ * uip_periodic() function:
++ \code
++ for(i = 0; i < UIP_UDP_CONNS; i++) {
++ uip_udp_periodic(i);
++ if(uip_len > 0) {
++ devicedriver_send();
++ }
++ }
++ \endcode
++ *
++ * \note As for the uip_periodic() function, special care has to be
++ * taken when using uIP together with ARP and Ethernet:
++ \code
++ for(i = 0; i < UIP_UDP_CONNS; i++) {
++ uip_udp_periodic(i);
++ if(uip_len > 0) {
++ uip_arp_out();
++ ethernet_devicedriver_send();
+ }
++ }
++ \endcode
++ *
++ * \param conn The number of the UDP connection to be processed.
++ *
++ * \hideinitializer
++ */
++#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \
++ uip_process(UIP_UDP_TIMER); } while (0)
++
++/**
++ * Periodic processing for a UDP connection identified by a pointer to
++ * its structure.
++ *
++ * Same as uip_udp_periodic() but takes a pointer to the actual
++ * uip_conn struct instead of an integer as its argument. This
++ * function can be used to force periodic processing of a specific
++ * connection.
++ *
++ * \param conn A pointer to the uip_udp_conn struct for the connection
++ * to be processed.
++ *
++ * \hideinitializer
++ */
++#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \
++ uip_process(UIP_UDP_TIMER); } while (0)
++
++
++#endif /* UIP_UDP */
++
++/**
++ * The uIP packet buffer.
++ *
++ * The uip_buf array is used to hold incoming and outgoing
++ * packets. The device driver should place incoming data into this
++ * buffer. When sending data, the device driver should read the link
++ * level headers and the TCP/IP headers from this buffer. The size of
++ * the link level headers is configured by the UIP_LLH_LEN define.
++ *
++ * \note The application data need not be placed in this buffer, so
++ * the device driver must read it from the place pointed to by the
++ * uip_appdata pointer as illustrated by the following example:
++ \code
++ void
++ devicedriver_send(void)
++ {
++ hwsend(&uip_buf[0], UIP_LLH_LEN);
++ hwsend(&uip_buf[UIP_LLH_LEN], 40);
++ hwsend(uip_appdata, uip_len - 40 - UIP_LLH_LEN);
++ }
++ \endcode
++ */
++extern u8_t uip_buf[UIP_BUFSIZE+2];
++
++/** @} */
+
-+ /* Check the URG flag. If this is set, the segment carries urgent
-+ data that we must pass to the application. */
-+ if(BUF->flags & TCP_URG) {
-+#if UIP_URGDATA > 0
-+ uip_urglen = (BUF->urgp[0] << 8) | BUF->urgp[1];
-+ if(uip_urglen > uip_len) {
-+ /* There is more urgent data in the next segment to come. */
-+ uip_urglen = uip_len;
-+ }
-+ uip_add_rcv_nxt(uip_urglen);
-+ uip_len -= uip_urglen;
-+ uip_urgdata = uip_appdata;
-+ uip_appdata += uip_urglen;
-+ } else {
-+ uip_urglen = 0;
-+#endif /* UIP_URGDATA > 0 */
-+ uip_appdata += (BUF->urgp[0] << 8) | BUF->urgp[1];
-+ uip_len -= (BUF->urgp[0] << 8) | BUF->urgp[1];
-+ }
-+
-+
-+ /* If uip_len > 0 we have TCP data in the packet, and we flag this
-+ by setting the UIP_NEWDATA flag and update the sequence number
-+ we acknowledge. If the application has stopped the dataflow
-+ using uip_stop(), we must not accept any data packets from the
-+ remote host. */
-+ if(uip_len > 0 && !(uip_connr->tcpstateflags & UIP_STOPPED)) {
-+ uip_flags |= UIP_NEWDATA;
-+ uip_add_rcv_nxt(uip_len);
-+ }
++/*-----------------------------------------------------------------------------------*/
++/* Functions that are used by the uIP application program. Opening and
++ * closing connections, sending and receiving data, etc. is all
++ * handled by the functions below.
++*/
++/**
++ * \defgroup uipappfunc uIP application functions
++ * @{
++ *
++ * Functions used by an application running of top of uIP.
++ */
+
-+ /* Check if the available buffer space advertised by the other end
-+ is smaller than the initial MSS for this connection. If so, we
-+ set the current MSS to the window size to ensure that the
-+ application does not send more data than the other end can
-+ handle.
++/**
++ * Start listening to the specified port.
++ *
++ * \note Since this function expects the port number in network byte
++ * order, a conversion using HTONS() or htons() is necessary.
++ *
++ \code
++ uip_listen(HTONS(80));
++ \endcode
++ *
++ * \param port A 16-bit port number in network byte order.
++ */
++void uip_listen(u16_t port);
+
-+ If the remote host advertises a zero window, we set the MSS to
-+ the initial MSS so that the application will send an entire MSS
-+ of data. This data will not be acknowledged by the receiver,
-+ and the application will retransmit it. This is called the
-+ "persistent timer" and uses the retransmission mechanim.
-+ */
-+ tmp16 = ((unsigned short int)BUF->wnd[0] << 8) + (unsigned short int)BUF->wnd[1];
-+ if(tmp16 > uip_connr->initialmss ||
-+ tmp16 == 0) {
-+ tmp16 = uip_connr->initialmss;
-+ }
-+ uip_connr->mss = tmp16;
++/**
++ * Stop listening to the specified port.
++ *
++ * \note Since this function expects the port number in network byte
++ * order, a conversion using HTONS() or htons() is necessary.
++ *
++ \code
++ uip_unlisten(HTONS(80));
++ \endcode
++ *
++ * \param port A 16-bit port number in network byte order.
++ */
++void uip_unlisten(u16_t port);
+
-+ /* If this packet constitutes an ACK for outstanding data (flagged
-+ by the UIP_ACKDATA flag, we should call the application since it
-+ might want to send more data. If the incoming packet had data
-+ from the peer (as flagged by the UIP_NEWDATA flag), the
-+ application must also be notified.
++/**
++ * Connect to a remote host using TCP.
++ *
++ * This function is used to start a new connection to the specified
++ * port on the specied host. It allocates a new connection identifier,
++ * sets the connection to the SYN_SENT state and sets the
++ * retransmission timer to 0. This will cause a TCP SYN segment to be
++ * sent out the next time this connection is periodically processed,
++ * which usually is done within 0.5 seconds after the call to
++ * uip_connect().
++ *
++ * \note This function is avaliable only if support for active open
++ * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h.
++ *
++ * \note Since this function requires the port number to be in network
++ * byte order, a convertion using HTONS() or htons() is necessary.
++ *
++ \code
++ u16_t ipaddr[2];
+
-+ When the application is called, the global variable uip_len
-+ contains the length of the incoming data. The application can
-+ access the incoming data through the global pointer
-+ uip_appdata, which usually points 40 bytes into the uip_buf
-+ array.
++ uip_ipaddr(ipaddr, 192,168,1,2);
++ uip_connect(ipaddr, HTONS(80));
++ \endcode
++ *
++ * \param ripaddr A pointer to a 4-byte array representing the IP
++ * address of the remote hot.
++ *
++ * \param port A 16-bit port number in network byte order.
++ *
++ * \return A pointer to the uIP connection identifier for the new connection,
++ * or NULL if no connection could be allocated.
++ *
++ */
++struct uip_conn *uip_connect(u16_t *ripaddr, u16_t port);
+
-+ If the application wishes to send any data, this data should be
-+ put into the uip_appdata and the length of the data should be
-+ put into uip_len. If the application don't have any data to
-+ send, uip_len must be set to 0. */
-+ if(uip_flags & (UIP_NEWDATA | UIP_ACKDATA)) {
-+ uip_slen = 0;
-+ UIP_APPCALL();
+
-+ appsend:
-+
-+ if(uip_flags & UIP_ABORT) {
-+ uip_slen = 0;
-+ uip_connr->tcpstateflags = CLOSED;
-+ BUF->flags = TCP_RST | TCP_ACK;
-+ goto tcp_send_nodata;
-+ }
+
-+ if(uip_flags & UIP_CLOSE) {
-+ uip_slen = 0;
-+ uip_connr->len = 1;
-+ uip_connr->tcpstateflags = FIN_WAIT_1;
-+ uip_connr->nrtx = 0;
-+ BUF->flags = TCP_FIN | TCP_ACK;
-+ goto tcp_send_nodata;
-+ }
++/**
++ * \internal
++ *
++ * Check if a connection has outstanding (i.e., unacknowledged) data.
++ *
++ * \param conn A pointer to the uip_conn structure for the connection.
++ *
++ * \hideinitializer
++ */
++#define uip_outstanding(conn) ((conn)->len)
+
-+ /* If uip_slen > 0, the application has data to be sent. */
-+ if(uip_slen > 0) {
++/**
++ * Send data on the current connection.
++ *
++ * This function is used to send out a single segment of TCP
++ * data. Only applications that have been invoked by uIP for event
++ * processing can send data.
++ *
++ * The amount of data that actually is sent out after a call to this
++ * funcion is determined by the maximum amount of data TCP allows. uIP
++ * will automatically crop the data so that only the appropriate
++ * amount of data is sent. The function uip_mss() can be used to query
++ * uIP for the amount of data that actually will be sent.
++ *
++ * \note This function does not guarantee that the sent data will
++ * arrive at the destination. If the data is lost in the network, the
++ * application will be invoked with the uip_rexmit() event being
++ * set. The application will then have to resend the data using this
++ * function.
++ *
++ * \param data A pointer to the data which is to be sent.
++ *
++ * \param len The maximum amount of data bytes to be sent.
++ *
++ * \hideinitializer
++ */
++#define uip_send(data, len) do { uip_sappdata = (data); uip_slen = (len);} while(0)
+
-+ /* If the connection has acknowledged data, the contents of
-+ the ->len variable should be discarded. */
-+ if((uip_flags & UIP_ACKDATA) != 0) {
-+ uip_connr->len = 0;
-+ }
++/**
++ * The length of any incoming data that is currently avaliable (if avaliable)
++ * in the uip_appdata buffer.
++ *
++ * The test function uip_data() must first be used to check if there
++ * is any data available at all.
++ *
++ * \hideinitializer
++ */
++#define uip_datalen() uip_len
+
-+ /* If the ->len variable is non-zero the connection has
-+ already data in transit and cannot send anymore right
-+ now. */
-+ if(uip_connr->len == 0) {
++/**
++ * The length of any out-of-band data (urgent data) that has arrived
++ * on the connection.
++ *
++ * \note The configuration parameter UIP_URGDATA must be set for this
++ * function to be enabled.
++ *
++ * \hideinitializer
++ */
++#define uip_urgdatalen() uip_urglen
+
-+ /* The application cannot send more than what is allowed by
-+ the mss (the minumum of the MSS and the available
-+ window). */
-+ if(uip_slen > uip_connr->mss) {
-+ uip_slen = uip_connr->mss;
-+ }
++/**
++ * Close the current connection.
++ *
++ * This function will close the current connection in a nice way.
++ *
++ * \hideinitializer
++ */
++#define uip_close() (uip_flags = UIP_CLOSE)
+
-+ /* Remember how much data we send out now so that we know
-+ when everything has been acknowledged. */
-+ uip_connr->len = uip_slen;
-+ } else {
++/**
++ * Abort the current connection.
++ *
++ * This function will abort (reset) the current connection, and is
++ * usually used when an error has occured that prevents using the
++ * uip_close() function.
++ *
++ * \hideinitializer
++ */
++#define uip_abort() (uip_flags = UIP_ABORT)
++
++/**
++ * Tell the sending host to stop sending data.
++ *
++ * This function will close our receiver's window so that we stop
++ * receiving data for the current connection.
++ *
++ * \hideinitializer
++ */
++#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
+
-+ /* If the application already had unacknowledged data, we
-+ make sure that the application does not send (i.e.,
-+ retransmit) out more than it previously sent out. */
-+ uip_slen = uip_connr->len;
-+ }
-+ } else {
-+ uip_connr->len = 0;
-+ }
-+ uip_connr->nrtx = 0;
-+ apprexmit:
-+ uip_appdata = uip_sappdata;
++/**
++ * Find out if the current connection has been previously stopped with
++ * uip_stop().
++ *
++ * \hideinitializer
++ */
++#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED)
+
-+ /* If the application has data to be sent, or if the incoming
-+ packet had new data in it, we must send out a packet. */
-+ if(uip_slen > 0 && uip_connr->len > 0) {
-+ /* Add the length of the IP and TCP headers. */
-+ uip_len = uip_connr->len + UIP_TCPIP_HLEN;
-+ /* We always set the ACK flag in response packets. */
-+ BUF->flags = TCP_ACK | TCP_PSH;
-+ /* Send the packet. */
-+ goto tcp_send_noopts;
-+ }
-+ /* If there is no data to send, just send out a pure ACK if
-+ there is newdata. */
-+ if(uip_flags & UIP_NEWDATA) {
-+ uip_len = UIP_TCPIP_HLEN;
-+ BUF->flags = TCP_ACK;
-+ goto tcp_send_noopts;
-+ }
-+ }
-+ goto drop;
-+ case LAST_ACK:
-+ /* We can close this connection if the peer has acknowledged our
-+ FIN. This is indicated by the UIP_ACKDATA flag. */
-+ if(uip_flags & UIP_ACKDATA) {
-+ uip_connr->tcpstateflags = CLOSED;
-+ uip_flags = UIP_CLOSE;
-+ UIP_APPCALL();
-+ }
-+ break;
-+
-+ case FIN_WAIT_1:
-+ /* The application has closed the connection, but the remote host
-+ hasn't closed its end yet. Thus we do nothing but wait for a
-+ FIN from the other side. */
-+ if(uip_len > 0) {
-+ uip_add_rcv_nxt(uip_len);
-+ }
-+ if(BUF->flags & TCP_FIN) {
-+ if(uip_flags & UIP_ACKDATA) {
-+ uip_connr->tcpstateflags = TIME_WAIT;
-+ uip_connr->timer = 0;
-+ uip_connr->len = 0;
-+ } else {
-+ uip_connr->tcpstateflags = CLOSING;
-+ }
-+ uip_add_rcv_nxt(1);
-+ uip_flags = UIP_CLOSE;
-+ UIP_APPCALL();
-+ goto tcp_send_ack;
-+ } else if(uip_flags & UIP_ACKDATA) {
-+ uip_connr->tcpstateflags = FIN_WAIT_2;
-+ uip_connr->len = 0;
-+ goto drop;
-+ }
-+ if(uip_len > 0) {
-+ goto tcp_send_ack;
-+ }
-+ goto drop;
-+
-+ case FIN_WAIT_2:
-+ if(uip_len > 0) {
-+ uip_add_rcv_nxt(uip_len);
-+ }
-+ if(BUF->flags & TCP_FIN) {
-+ uip_connr->tcpstateflags = TIME_WAIT;
-+ uip_connr->timer = 0;
-+ uip_add_rcv_nxt(1);
-+ uip_flags = UIP_CLOSE;
-+ UIP_APPCALL();
-+ goto tcp_send_ack;
-+ }
-+ if(uip_len > 0) {
-+ goto tcp_send_ack;
-+ }
-+ goto drop;
++/**
++ * Restart the current connection, if is has previously been stopped
++ * with uip_stop().
++ *
++ * This function will open the receiver's window again so that we
++ * start receiving data for the current connection.
++ *
++ * \hideinitializer
++ */
++#define uip_restart() do { uip_flags |= UIP_NEWDATA; \
++ uip_conn->tcpstateflags &= ~UIP_STOPPED; \
++ } while(0)
+
-+ case TIME_WAIT:
-+ goto tcp_send_ack;
-+
-+ case CLOSING:
-+ if(uip_flags & UIP_ACKDATA) {
-+ uip_connr->tcpstateflags = TIME_WAIT;
-+ uip_connr->timer = 0;
-+ }
-+ }
-+ goto drop;
-+
+
-+ /* We jump here when we are ready to send the packet, and just want
-+ to set the appropriate TCP sequence numbers in the TCP header. */
-+ tcp_send_ack:
-+ BUF->flags = TCP_ACK;
-+ tcp_send_nodata:
-+ uip_len = 40;
-+ tcp_send_noopts:
-+ BUF->tcpoffset = 5 << 4;
-+ tcp_send:
-+ /* We're done with the input processing. We are now ready to send a
-+ reply. Our job is to fill in all the fields of the TCP and IP
-+ headers before calculating the checksum and finally send the
-+ packet. */
-+ BUF->ackno[0] = uip_connr->rcv_nxt[0];
-+ BUF->ackno[1] = uip_connr->rcv_nxt[1];
-+ BUF->ackno[2] = uip_connr->rcv_nxt[2];
-+ BUF->ackno[3] = uip_connr->rcv_nxt[3];
-+
-+ BUF->seqno[0] = uip_connr->snd_nxt[0];
-+ BUF->seqno[1] = uip_connr->snd_nxt[1];
-+ BUF->seqno[2] = uip_connr->snd_nxt[2];
-+ BUF->seqno[3] = uip_connr->snd_nxt[3];
++/* uIP tests that can be made to determine in what state the current
++ connection is, and what the application function should do. */
+
-+ BUF->proto = UIP_PROTO_TCP;
-+
-+ BUF->srcport = uip_connr->lport;
-+ BUF->destport = uip_connr->rport;
++/**
++ * Is new incoming data available?
++ *
++ * Will reduce to non-zero if there is new data for the application
++ * present at the uip_appdata pointer. The size of the data is
++ * avaliable through the uip_len variable.
++ *
++ * \hideinitializer
++ */
++#define uip_newdata() (uip_flags & UIP_NEWDATA)
+
-+ BUF->srcipaddr[0] = uip_hostaddr[0];
-+ BUF->srcipaddr[1] = uip_hostaddr[1];
-+ BUF->destipaddr[0] = uip_connr->ripaddr[0];
-+ BUF->destipaddr[1] = uip_connr->ripaddr[1];
-+
++/**
++ * Has previously sent data been acknowledged?
++ *
++ * Will reduce to non-zero if the previously sent data has been
++ * acknowledged by the remote host. This means that the application
++ * can send new data.
++ *
++ * \hideinitializer
++ */
++#define uip_acked() (uip_flags & UIP_ACKDATA)
+
-+ if(uip_connr->tcpstateflags & UIP_STOPPED) {
-+ /* If the connection has issued uip_stop(), we advertise a zero
-+ window so that the remote host will stop sending data. */
-+ BUF->wnd[0] = BUF->wnd[1] = 0;
-+ } else {
-+ BUF->wnd[0] = ((UIP_RECEIVE_WINDOW) >> 8);
-+ BUF->wnd[1] = ((UIP_RECEIVE_WINDOW) & 0xff);
-+ }
++/**
++ * Has the connection just been connected?
++ *
++ * Reduces to non-zero if the current connection has been connected to
++ * a remote host. This will happen both if the connection has been
++ * actively opened (with uip_connect()) or passively opened (with
++ * uip_listen()).
++ *
++ * \hideinitializer
++ */
++#define uip_connected() (uip_flags & UIP_CONNECTED)
+
-+ tcp_send_noconn:
++/**
++ * Has the connection been closed by the other end?
++ *
++ * Is non-zero if the connection has been closed by the remote
++ * host. The application may then do the necessary clean-ups.
++ *
++ * \hideinitializer
++ */
++#define uip_closed() (uip_flags & UIP_CLOSE)
+
-+ BUF->len[0] = (uip_len >> 8);
-+ BUF->len[1] = (uip_len & 0xff);
++/**
++ * Has the connection been aborted by the other end?
++ *
++ * Non-zero if the current connection has been aborted (reset) by the
++ * remote host.
++ *
++ * \hideinitializer
++ */
++#define uip_aborted() (uip_flags & UIP_ABORT)
+
-+ /* Calculate TCP checksum. */
-+ BUF->tcpchksum = 0;
-+ BUF->tcpchksum = ~(uip_tcpchksum());
-+
-+ //ip_send_nolen:
++/**
++ * Has the connection timed out?
++ *
++ * Non-zero if the current connection has been aborted due to too many
++ * retransmissions.
++ *
++ * \hideinitializer
++ */
++#define uip_timedout() (uip_flags & UIP_TIMEDOUT)
+
-+ BUF->vhl = 0x45;
-+ BUF->tos = 0;
-+ BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
-+ BUF->ttl = UIP_TTL;
-+ ++ipid;
-+ BUF->ipid[0] = ipid >> 8;
-+ BUF->ipid[1] = ipid & 0xff;
-+
-+ /* Calculate IP checksum. */
-+ BUF->ipchksum = 0;
-+ BUF->ipchksum = ~(uip_ipchksum());
++/**
++ * Do we need to retransmit previously data?
++ *
++ * Reduces to non-zero if the previously sent data has been lost in
++ * the network, and the application should retransmit it. The
++ * application should send the exact same data as it did the last
++ * time, using the uip_send() function.
++ *
++ * \hideinitializer
++ */
++#define uip_rexmit() (uip_flags & UIP_REXMIT)
++
++/**
++ * Is the connection being polled by uIP?
++ *
++ * Is non-zero if the reason the application is invoked is that the
++ * current connection has been idle for a while and should be
++ * polled.
++ *
++ * The polling event can be used for sending data without having to
++ * wait for the remote host to send data.
++ *
++ * \hideinitializer
++ */
++#define uip_poll() (uip_flags & UIP_POLL)
+
-+ UIP_STAT(++uip_stat.tcp.sent);
-+ send:
-+ UIP_STAT(++uip_stat.ip.sent);
-+ /* Return and let the caller do the actual transmission. */
-+ return;
-+ drop:
-+ uip_len = 0;
-+ return;
-+}
-+/*-----------------------------------------------------------------------------------*/
-+/*unsigned short int
-+htons(unsigned short int val)
-+{
-+ return HTONS(val);
-+}*/
-+/*-----------------------------------------------------------------------------------*/
-+/** @} */
---- /dev/null
-+++ b/net/uip-0.9/uip.h
-@@ -0,0 +1,1066 @@
+/**
-+ * \addtogroup uip
-+ * @{
++ * Get the initial maxium segment size (MSS) of the current
++ * connection.
++ *
++ * \hideinitializer
+ */
++#define uip_initialmss() (uip_conn->initialmss)
+
+/**
-+ * \file
-+ * Header file for the uIP TCP/IP stack.
-+ * \author Adam Dunkels <adam@dunkels.com>
++ * Get the current maxium segment size that can be sent on the current
++ * connection.
+ *
-+ * The uIP TCP/IP stack header file contains definitions for a number
-+ * of C macros that are used by uIP programs as well as internal uIP
-+ * structures, TCP/IP header structures and function declarations.
++ * The current maxiumum segment size that can be sent on the
++ * connection is computed from the receiver's window and the MSS of
++ * the connection (which also is available by calling
++ * uip_initialmss()).
+ *
++ * \hideinitializer
+ */
++#define uip_mss() (uip_conn->mss)
+
-+
-+/*
-+ * Copyright (c) 2001-2003, Adam Dunkels.
-+ * All rights reserved.
++/**
++ * Set up a new UDP connection.
+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The name of the author may not be used to endorse or promote
-+ * products derived from this software without specific prior
-+ * written permission.
++ * \param ripaddr A pointer to a 4-byte structure representing the IP
++ * address of the remote host.
+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
-+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ * \param rport The remote port number in network byte order.
+ *
-+ * This file is part of the uIP TCP/IP stack.
++ * \return The uip_udp_conn structure for the new connection or NULL
++ * if no connection could be allocated.
++ */
++struct uip_udp_conn *uip_udp_new(u16_t *ripaddr, u16_t rport);
++
++/**
++ * Removed a UDP connection.
+ *
-+ * $Id: uip.h,v 1.36.2.7 2003/10/07 13:47:51 adam Exp $
++ * \param conn A pointer to the uip_udp_conn structure for the connection.
+ *
++ * \hideinitializer
+ */
++#define uip_udp_remove(conn) (conn)->lport = 0
+
-+#ifndef __UIP_H__
-+#define __UIP_H__
-+#include <linux/types.h>
-+#include <linux/string.h>
-+#include <linux/ctype.h>
-+#include <malloc.h>
-+#include <common.h>
-+
++/**
++ * Send a UDP datagram of length len on the current connection.
++ *
++ * This function can only be called in response to a UDP event (poll
++ * or newdata). The data must be present in the uip_buf buffer, at the
++ * place pointed to by the uip_appdata pointer.
++ *
++ * \param len The length of the data in the uip_buf buffer.
++ *
++ * \hideinitializer
++ */
++#define uip_udp_send(len) uip_slen = (len)
+
-+#include "uipopt.h"
++/** @} */
+
-+/*-----------------------------------------------------------------------------------*/
-+/* First, the functions that should be called from the
-+ * system. Initialization, the periodic timer and incoming packets are
-+ * handled by the following three functions.
-+ */
++/* uIP convenience and converting functions. */
+
+/**
-+ * \defgroup uipconffunc uIP configuration functions
++ * \defgroup uipconvfunc uIP conversion functions
+ * @{
+ *
-+ * The uIP configuration functions are used for setting run-time
-+ * parameters in uIP such as IP addresses.
++ * These functions can be used for converting between different data
++ * formats used by uIP.
+ */
-+
++
+/**
-+ * Set the IP address of this host.
++ * Pack an IP address into a 4-byte array which is used by uIP to
++ * represent IP addresses.
+ *
-+ * The IP address is represented as a 4-byte array where the first
-+ * octet of the IP address is put in the first member of the 4-byte
-+ * array.
++ * Example:
++ \code
++ u16_t ipaddr[2];
++
++ uip_ipaddr(&ipaddr, 192,168,1,2);
++ \endcode
+ *
-+ * \param addr A pointer to a 4-byte representation of the IP address.
++ * \param addr A pointer to a 4-byte array that will be filled in with
++ * the IP addres.
++ * \param addr0 The first octet of the IP address.
++ * \param addr1 The second octet of the IP address.
++ * \param addr2 The third octet of the IP address.
++ * \param addr3 The forth octet of the IP address.
+ *
+ * \hideinitializer
+ */
-+#define uip_sethostaddr(addr) do { uip_hostaddr[0] = addr[0]; \
-+ uip_hostaddr[1] = addr[1]; } while(0)
++#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
++ (addr)[0] = HTONS(((addr0) << 8) | (addr1)); \
++ (addr)[1] = HTONS(((addr2) << 8) | (addr3)); \
++ } while(0)
+
+/**
-+ * Get the IP address of this host.
-+ *
-+ * The IP address is represented as a 4-byte array where the first
-+ * octet of the IP address is put in the first member of the 4-byte
-+ * array.
++ * Convert 16-bit quantity from host byte order to network byte order.
+ *
-+ * \param addr A pointer to a 4-byte array that will be filled in with
-+ * the currently configured IP address.
++ * This macro is primarily used for converting constants from host
++ * byte order to network byte order. For converting variables to
++ * network byte order, use the htons() function instead.
+ *
+ * \hideinitializer
+ */
-+#define uip_gethostaddr(addr) do { addr[0] = uip_hostaddr[0]; \
-+ addr[1] = uip_hostaddr[1]; } while(0)
++#ifndef HTONS
++# if BYTE_ORDER == BIG_ENDIAN
++# define HTONS(n) (n)
++# else /* BYTE_ORDER == BIG_ENDIAN */
++# define HTONS(n) ((((u16_t)((n) & 0xff)) << 8) | (((n) & 0xff00) >> 8))
++# endif /* BYTE_ORDER == BIG_ENDIAN */
++#endif /* HTONS */
++
++/**
++ * Convert 16-bit quantity from host byte order to network byte order.
++ *
++ * This function is primarily used for converting variables from host
++ * byte order to network byte order. For converting constants to
++ * network byte order, use the HTONS() macro instead.
++ */
++#ifndef htons
++u16_t htons(u16_t val);
++#endif /* htons */
++
++/** @} */
++
++/**
++ * Pointer to the application data in the packet buffer.
++ *
++ * This pointer points to the application data when the application is
++ * called. If the application wishes to send data, the application may
++ * use this space to write the data into before calling uip_send().
++ */
++extern volatile u8_t *uip_appdata;
++extern volatile u8_t *uip_sappdata;
++
++#if UIP_URGDATA > 0
++/* u8_t *uip_urgdata:
++ *
++ * This pointer points to any urgent data that has been received. Only
++ * present if compiled with support for urgent data (UIP_URGDATA).
++ */
++extern volatile u8_t *uip_urgdata;
++#endif /* UIP_URGDATA > 0 */
++
++
++/* u[8|16]_t uip_len:
++ *
++ * When the application is called, uip_len contains the length of any
++ * new data that has been received from the remote host. The
++ * application should set this variable to the size of any data that
++ * the application wishes to send. When the network device driver
++ * output function is called, uip_len should contain the length of the
++ * outgoing packet.
++ */
++extern volatile u16_t uip_len, uip_slen;
++
++#if UIP_URGDATA > 0
++extern volatile u8_t uip_urglen, uip_surglen;
++#endif /* UIP_URGDATA > 0 */
++
++
++/**
++ * Representation of a uIP TCP connection.
++ *
++ * The uip_conn structure is used for identifying a connection. All
++ * but one field in the structure are to be considered read-only by an
++ * application. The only exception is the appstate field whos purpose
++ * is to let the application store application-specific state (e.g.,
++ * file pointers) for the connection. The size of this field is
++ * configured in the "uipopt.h" header file.
++ */
++struct uip_conn {
++ u16_t ripaddr[2]; /**< The IP address of the remote host. */
++
++ u16_t lport; /**< The local TCP port, in network byte order. */
++ u16_t rport; /**< The local remote TCP port, in network byte
++ order. */
++
++ u8_t rcv_nxt[4]; /**< The sequence number that we expect to
++ receive next. */
++ u8_t snd_nxt[4]; /**< The sequence number that was last sent by
++ us. */
++ u16_t len; /**< Length of the data that was previously sent. */
++ u16_t mss; /**< Current maximum segment size for the
++ connection. */
++ u16_t initialmss; /**< Initial maximum segment size for the
++ connection. */
++ u8_t sa; /**< Retransmission time-out calculation state
++ variable. */
++ u8_t sv; /**< Retransmission time-out calculation state
++ variable. */
++ u8_t rto; /**< Retransmission time-out. */
++ u8_t tcpstateflags; /**< TCP state and flags. */
++ u8_t timer; /**< The retransmission timer. */
++ u8_t nrtx; /**< The number of retransmissions for the last
++ segment sent. */
++
++ /** The application state. */
++ u8_t appstate[UIP_APPSTATE_SIZE];
++};
+
-+/** @} */
+
++/* Pointer to the current connection. */
++extern struct uip_conn *uip_conn;
++/* The array containing all uIP connections. */
++extern struct uip_conn uip_conns[UIP_CONNS];
+/**
-+ * \defgroup uipinit uIP initialization functions
++ * \addtogroup uiparch
+ * @{
-+ *
-+ * The uIP initialization functions are used for booting uIP.
+ */
+
+/**
-+ * uIP initialization function.
-+ *
-+ * This function should be called at boot up to initilize the uIP
-+ * TCP/IP stack.
++ * 4-byte array used for the 32-bit sequence number calculations.
+ */
-+void uip_init(void);
++extern volatile u8_t uip_acc32[4];
+
+/** @} */
+
-+/**
-+ * \defgroup uipdevfunc uIP device driver functions
-+ * @{
-+ *
-+ * These functions are used by a network device driver for interacting
-+ * with uIP.
-+ */
+
++#if UIP_UDP
+/**
-+ * Process an incoming packet.
-+ *
-+ * This function should be called when the device driver has received
-+ * a packet from the network. The packet from the device driver must
-+ * be present in the uip_buf buffer, and the length of the packet
-+ * should be placed in the uip_len variable.
-+ *
-+ * When the function returns, there may be an outbound packet placed
-+ * in the uip_buf packet buffer. If so, the uip_len variable is set to
-+ * the length of the packet. If no packet is to be sent out, the
-+ * uip_len variable is set to 0.
-+ *
-+ * The usual way of calling the function is presented by the source
-+ * code below.
-+ \code
-+ uip_len = devicedriver_poll();
-+ if(uip_len > 0) {
-+ uip_input();
-+ if(uip_len > 0) {
-+ devicedriver_send();
-+ }
-+ }
-+ \endcode
-+ *
-+ * \note If you are writing a uIP device driver that needs ARP
-+ * (Address Resolution Protocol), e.g., when running uIP over
-+ * Ethernet, you will need to call the uIP ARP code before calling
-+ * this function:
-+ \code
-+ #define BUF ((struct uip_eth_hdr *)&uip_buf[0])
-+ uip_len = ethernet_devicedrver_poll();
-+ if(uip_len > 0) {
-+ if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
-+ uip_arp_ipin();
-+ uip_input();
-+ if(uip_len > 0) {
-+ uip_arp_out();
-+ ethernet_devicedriver_send();
-+ }
-+ } else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
-+ uip_arp_arpin();
-+ if(uip_len > 0) {
-+ ethernet_devicedriver_send();
-+ }
-+ }
-+ \endcode
-+ *
-+ * \hideinitializer
++ * Representation of a uIP UDP connection.
+ */
-+#define uip_input() uip_process(UIP_DATA)
++struct uip_udp_conn {
++ u16_t ripaddr[2]; /**< The IP address of the remote peer. */
++ u16_t lport; /**< The local port number in network byte order. */
++ u16_t rport; /**< The remote port number in network byte order. */
++};
++
++extern struct uip_udp_conn *uip_udp_conn;
++extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
++#endif /* UIP_UDP */
+
+/**
-+ * Periodic processing for a connection identified by its number.
-+ *
-+ * This function does the necessary periodic processing (timers,
-+ * polling) for a uIP TCP conneciton, and should be called when the
-+ * periodic uIP timer goes off. It should be called for every
-+ * connection, regardless of whether they are open of closed.
-+ *
-+ * When the function returns, it may have an outbound packet waiting
-+ * for service in the uIP packet buffer, and if so the uip_len
-+ * variable is set to a value larger than zero. The device driver
-+ * should be called to send out the packet.
-+ *
-+ * The ususal way of calling the function is through a for() loop like
-+ * this:
-+ \code
-+ for(i = 0; i < UIP_CONNS; ++i) {
-+ uip_periodic(i);
-+ if(uip_len > 0) {
-+ devicedriver_send();
-+ }
-+ }
-+ \endcode
-+ *
-+ * \note If you are writing a uIP device driver that needs ARP
-+ * (Address Resolution Protocol), e.g., when running uIP over
-+ * Ethernet, you will need to call the uip_arp_out() function before
-+ * calling the device driver:
-+ \code
-+ for(i = 0; i < UIP_CONNS; ++i) {
-+ uip_periodic(i);
-+ if(uip_len > 0) {
-+ uip_arp_out();
-+ ethernet_devicedriver_send();
-+ }
-+ }
-+ \endcode
-+ *
-+ * \param conn The number of the connection which is to be periodically polled.
++ * The structure holding the TCP/IP statistics that are gathered if
++ * UIP_STATISTICS is set to 1.
+ *
-+ * \hideinitializer
+ */
-+#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \
-+ uip_process(UIP_TIMER); } while (0)
++struct uip_stats {
++ struct {
++ uip_stats_t drop; /**< Number of dropped packets at the IP
++ layer. */
++ uip_stats_t recv; /**< Number of received packets at the IP
++ layer. */
++ uip_stats_t sent; /**< Number of sent packets at the IP
++ layer. */
++ uip_stats_t vhlerr; /**< Number of packets dropped due to wrong
++ IP version or header length. */
++ uip_stats_t hblenerr; /**< Number of packets dropped due to wrong
++ IP length, high byte. */
++ uip_stats_t lblenerr; /**< Number of packets dropped due to wrong
++ IP length, low byte. */
++ uip_stats_t fragerr; /**< Number of packets dropped since they
++ were IP fragments. */
++ uip_stats_t chkerr; /**< Number of packets dropped due to IP
++ checksum errors. */
++ uip_stats_t protoerr; /**< Number of packets dropped since they
++ were neither ICMP, UDP nor TCP. */
++ } ip; /**< IP statistics. */
++ struct {
++ uip_stats_t drop; /**< Number of dropped ICMP packets. */
++ uip_stats_t recv; /**< Number of received ICMP packets. */
++ uip_stats_t sent; /**< Number of sent ICMP packets. */
++ uip_stats_t typeerr; /**< Number of ICMP packets with a wrong
++ type. */
++ } icmp; /**< ICMP statistics. */
++ struct {
++ uip_stats_t drop; /**< Number of dropped TCP segments. */
++ uip_stats_t recv; /**< Number of recived TCP segments. */
++ uip_stats_t sent; /**< Number of sent TCP segments. */
++ uip_stats_t chkerr; /**< Number of TCP segments with a bad
++ checksum. */
++ uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK
++ number. */
++ uip_stats_t rst; /**< Number of recevied TCP RST (reset) segments. */
++ uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */
++ uip_stats_t syndrop; /**< Number of dropped SYNs due to too few
++ connections was avaliable. */
++ uip_stats_t synrst; /**< Number of SYNs for closed ports,
++ triggering a RST. */
++ } tcp; /**< TCP statistics. */
++};
+
+/**
-+ * Periodic processing for a connection identified by a pointer to its structure.
-+ *
-+ * Same as uip_periodic() but takes a pointer to the actual uip_conn
-+ * struct instead of an integer as its argument. This function can be
-+ * used to force periodic processing of a specific connection.
-+ *
-+ * \param conn A pointer to the uip_conn struct for the connection to
-+ * be processed.
++ * The uIP TCP/IP statistics.
+ *
-+ * \hideinitializer
++ * This is the variable in which the uIP TCP/IP statistics are gathered.
+ */
-+#define uip_periodic_conn(conn) do { uip_conn = conn; \
-+ uip_process(UIP_TIMER); } while (0)
++extern struct uip_stats uip_stat;
+
-+#if UIP_UDP
-+/**
-+ * Periodic processing for a UDP connection identified by its number.
-+ *
-+ * This function is essentially the same as uip_prerioic(), but for
-+ * UDP connections. It is called in a similar fashion as the
-+ * uip_periodic() function:
-+ \code
-+ for(i = 0; i < UIP_UDP_CONNS; i++) {
-+ uip_udp_periodic(i);
-+ if(uip_len > 0) {
-+ devicedriver_send();
-+ }
-+ }
-+ \endcode
-+ *
-+ * \note As for the uip_periodic() function, special care has to be
-+ * taken when using uIP together with ARP and Ethernet:
-+ \code
-+ for(i = 0; i < UIP_UDP_CONNS; i++) {
-+ uip_udp_periodic(i);
-+ if(uip_len > 0) {
-+ uip_arp_out();
-+ ethernet_devicedriver_send();
-+ }
-+ }
-+ \endcode
-+ *
-+ * \param conn The number of the UDP connection to be processed.
++
++/*-----------------------------------------------------------------------------------*/
++/* All the stuff below this point is internal to uIP and should not be
++ * used directly by an application or by a device driver.
++ */
++/*-----------------------------------------------------------------------------------*/
++/* u8_t uip_flags:
+ *
-+ * \hideinitializer
++ * When the application is called, uip_flags will contain the flags
++ * that are defined in this file. Please read below for more
++ * infomation.
+ */
-+#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \
-+ uip_process(UIP_UDP_TIMER); } while (0)
++extern volatile u8_t uip_flags;
++
++/* The following flags may be set in the global variable uip_flags
++ before calling the application callback. The UIP_ACKDATA and
++ UIP_NEWDATA flags may both be set at the same time, whereas the
++ others are mutualy exclusive. Note that these flags should *NOT* be
++ accessed directly, but through the uIP functions/macros. */
++
++#define UIP_ACKDATA 1 /* Signifies that the outstanding data was
++ acked and the application should send
++ out new data instead of retransmitting
++ the last data. */
++#define UIP_NEWDATA 2 /* Flags the fact that the peer has sent
++ us new data. */
++#define UIP_REXMIT 4 /* Tells the application to retransmit the
++ data that was last sent. */
++#define UIP_POLL 8 /* Used for polling the application, to
++ check if the application has data that
++ it wants to send. */
++#define UIP_CLOSE 16 /* The remote host has closed the
++ connection, thus the connection has
++ gone away. Or the application signals
++ that it wants to close the
++ connection. */
++#define UIP_ABORT 32 /* The remote host has aborted the
++ connection, thus the connection has
++ gone away. Or the application signals
++ that it wants to abort the
++ connection. */
++#define UIP_CONNECTED 64 /* We have got a connection from a remote
++ host and have set up a new connection
++ for it, or an active connection has
++ been successfully established. */
+
-+/**
-+ * Periodic processing for a UDP connection identified by a pointer to
-+ * its structure.
-+ *
-+ * Same as uip_udp_periodic() but takes a pointer to the actual
-+ * uip_conn struct instead of an integer as its argument. This
-+ * function can be used to force periodic processing of a specific
-+ * connection.
-+ *
-+ * \param conn A pointer to the uip_udp_conn struct for the connection
-+ * to be processed.
++#define UIP_TIMEDOUT 128 /* The connection has been aborted due to
++ too many retransmissions. */
++
++
++/* uip_process(flag):
+ *
-+ * \hideinitializer
++ * The actual uIP function which does all the work.
+ */
-+#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \
-+ uip_process(UIP_UDP_TIMER); } while (0)
++void uip_process(u8_t flag);
+
++/* The following flags are passed as an argument to the uip_process()
++ function. They are used to distinguish between the two cases where
++ uip_process() is called. It can be called either because we have
++ incoming data that should be processed, or because the periodic
++ timer has fired. */
+
++#define UIP_DATA 1 /* Tells uIP that there is incoming data in
++ the uip_buf buffer. The length of the
++ data is stored in the global variable
++ uip_len. */
++#define UIP_TIMER 2 /* Tells uIP that the periodic timer has
++ fired. */
++#if UIP_UDP
++#define UIP_UDP_TIMER 3
+#endif /* UIP_UDP */
+
-+/**
-+ * The uIP packet buffer.
-+ *
-+ * The uip_buf array is used to hold incoming and outgoing
-+ * packets. The device driver should place incoming data into this
-+ * buffer. When sending data, the device driver should read the link
-+ * level headers and the TCP/IP headers from this buffer. The size of
-+ * the link level headers is configured by the UIP_LLH_LEN define.
-+ *
-+ * \note The application data need not be placed in this buffer, so
-+ * the device driver must read it from the place pointed to by the
-+ * uip_appdata pointer as illustrated by the following example:
-+ \code
-+ void
-+ devicedriver_send(void)
-+ {
-+ hwsend(&uip_buf[0], UIP_LLH_LEN);
-+ hwsend(&uip_buf[UIP_LLH_LEN], 40);
-+ hwsend(uip_appdata, uip_len - 40 - UIP_LLH_LEN);
-+ }
-+ \endcode
-+ */
-+extern u8_t uip_buf[UIP_BUFSIZE+2];
++/* The TCP states used in the uip_conn->tcpstateflags. */
++#define CLOSED 0
++#define SYN_RCVD 1
++#define SYN_SENT 2
++#define ESTABLISHED 3
++#define FIN_WAIT_1 4
++#define FIN_WAIT_2 5
++#define CLOSING 6
++#define TIME_WAIT 7
++#define LAST_ACK 8
++#define TS_MASK 15
++
++#define UIP_STOPPED 16
+
-+/** @} */
++#define UIP_TCPIP_HLEN 40
+
-+/*-----------------------------------------------------------------------------------*/
-+/* Functions that are used by the uIP application program. Opening and
-+ * closing connections, sending and receiving data, etc. is all
-+ * handled by the functions below.
-+*/
-+/**
-+ * \defgroup uipappfunc uIP application functions
-+ * @{
-+ *
-+ * Functions used by an application running of top of uIP.
-+ */
++/* The TCP and IP headers. */
++typedef struct {
++ /* IP header. */
++ u8_t vhl,
++ tos,
++ len[2],
++ ipid[2],
++ ipoffset[2],
++ ttl,
++ proto;
++ u16_t ipchksum;
++ u16_t srcipaddr[2],
++ destipaddr[2];
++
++ /* TCP header. */
++ u16_t srcport,
++ destport;
++ u8_t seqno[4],
++ ackno[4],
++ tcpoffset,
++ flags,
++ wnd[2];
++ u16_t tcpchksum;
++ u8_t urgp[2];
++ u8_t optdata[4];
++} uip_tcpip_hdr;
+
-+/**
-+ * Start listening to the specified port.
-+ *
-+ * \note Since this function expects the port number in network byte
-+ * order, a conversion using HTONS() or htons() is necessary.
++/* The ICMP and IP headers. */
++typedef struct {
++ /* IP header. */
++ u8_t vhl,
++ tos,
++ len[2],
++ ipid[2],
++ ipoffset[2],
++ ttl,
++ proto;
++ u16_t ipchksum;
++ u16_t srcipaddr[2],
++ destipaddr[2];
++ /* ICMP (echo) header. */
++ u8_t type, icode;
++ u16_t icmpchksum;
++ u16_t id, seqno;
++} uip_icmpip_hdr;
++
++
++/* The UDP and IP headers. */
++typedef struct {
++ /* IP header. */
++ u8_t vhl,
++ tos,
++ len[2],
++ ipid[2],
++ ipoffset[2],
++ ttl,
++ proto;
++ u16_t ipchksum;
++ u16_t srcipaddr[2],
++ destipaddr[2];
++
++ /* UDP header. */
++ u16_t srcport,
++ destport;
++ u16_t udplen;
++ u16_t udpchksum;
++} uip_udpip_hdr;
++
++#define UIP_PROTO_ICMP 1
++#define UIP_PROTO_TCP 6
++#define UIP_PROTO_UDP 17
++
++#if UIP_FIXEDADDR
++extern const u16_t uip_hostaddr[2];
++#else /* UIP_FIXEDADDR */
++extern u16_t uip_hostaddr[2];
++#endif /* UIP_FIXEDADDR */
++
++#endif /* __UIP_H__ */
++
++
++/** @} */
++
+--- /dev/null
++++ b/net/uip-0.9/uip_arch.c
+@@ -0,0 +1,145 @@
++/*
++ * Copyright (c) 2001, Adam Dunkels.
++ * All rights reserved.
+ *
-+ \code
-+ uip_listen(HTONS(80));
-+ \endcode
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote
++ * products derived from this software without specific prior
++ * written permission.
+ *
-+ * \param port A 16-bit port number in network byte order.
-+ */
-+void uip_listen(u16_t port);
-+
-+/**
-+ * Stop listening to the specified port.
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
++ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
++ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
++ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
++ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
++ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
-+ * \note Since this function expects the port number in network byte
-+ * order, a conversion using HTONS() or htons() is necessary.
++ * This file is part of the uIP TCP/IP stack.
+ *
-+ \code
-+ uip_unlisten(HTONS(80));
-+ \endcode
++ * $Id: uip_arch.c,v 1.2.2.1 2003/10/04 22:54:17 adam Exp $
+ *
-+ * \param port A 16-bit port number in network byte order.
+ */
-+void uip_unlisten(u16_t port);
+
-+/**
-+ * Connect to a remote host using TCP.
-+ *
-+ * This function is used to start a new connection to the specified
-+ * port on the specied host. It allocates a new connection identifier,
-+ * sets the connection to the SYN_SENT state and sets the
-+ * retransmission timer to 0. This will cause a TCP SYN segment to be
-+ * sent out the next time this connection is periodically processed,
-+ * which usually is done within 0.5 seconds after the call to
-+ * uip_connect().
-+ *
-+ * \note This function is avaliable only if support for active open
-+ * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h.
-+ *
-+ * \note Since this function requires the port number to be in network
-+ * byte order, a convertion using HTONS() or htons() is necessary.
-+ *
-+ \code
-+ u16_t ipaddr[2];
+
-+ uip_ipaddr(ipaddr, 192,168,1,2);
-+ uip_connect(ipaddr, HTONS(80));
-+ \endcode
-+ *
-+ * \param ripaddr A pointer to a 4-byte array representing the IP
-+ * address of the remote hot.
-+ *
-+ * \param port A 16-bit port number in network byte order.
-+ *
-+ * \return A pointer to the uIP connection identifier for the new connection,
-+ * or NULL if no connection could be allocated.
-+ *
-+ */
-+struct uip_conn *uip_connect(u16_t *ripaddr, u16_t port);
++#include "uip.h"
++#include "uip_arch.h"
++
++#define BUF ((uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
++#define IP_PROTO_TCP 6
++
++/*-----------------------------------------------------------------------------------*/
++void
++uip_add32(u8_t *op32, u16_t op16)
++{
++
++ uip_acc32[3] = op32[3] + (op16 & 0xff);
++ uip_acc32[2] = op32[2] + (op16 >> 8);
++ uip_acc32[1] = op32[1];
++ uip_acc32[0] = op32[0];
++
++ if(uip_acc32[2] < (op16 >> 8)) {
++ ++uip_acc32[1];
++ if(uip_acc32[1] == 0) {
++ ++uip_acc32[0];
++ }
++ }
++
++
++ if(uip_acc32[3] < (op16 & 0xff)) {
++ ++uip_acc32[2];
++ if(uip_acc32[2] == 0) {
++ ++uip_acc32[1];
++ if(uip_acc32[1] == 0) {
++ ++uip_acc32[0];
++ }
++ }
++ }
++}
++/*-----------------------------------------------------------------------------------*/
++u16_t
++uip_chksum(u16_t *sdata, u16_t len)
++{
++ u16_t acc;
++
++ for(acc = 0; len > 1; len -= 2) {
++ acc += *sdata;
++ if(acc < *sdata) {
++ /* Overflow, so we add the carry to acc (i.e., increase by
++ one). */
++ ++acc;
++ }
++ ++sdata;
++ }
++
++ /* add up any odd byte */
++ if(len == 1) {
++ acc += htons(((u16_t)(*(u8_t *)sdata)) << 8);
++ if(acc < htons(((u16_t)(*(u8_t *)sdata)) << 8)) {
++ ++acc;
++ }
++ }
++
++ return acc;
++}
++/*-----------------------------------------------------------------------------------*/
++u16_t
++uip_ipchksum(void)
++{
++ return uip_chksum((u16_t *)&uip_buf[UIP_LLH_LEN], 20);
++}
++/*-----------------------------------------------------------------------------------*/
++u16_t
++uip_tcpchksum(void)
++{
++ u16_t hsum, sum;
+
++
++ /* Compute the checksum of the TCP header. */
++ hsum = uip_chksum((u16_t *)&uip_buf[20 + UIP_LLH_LEN], 20);
+
++ /* Compute the checksum of the data in the TCP packet and add it to
++ the TCP header checksum. */
++ sum = uip_chksum((u16_t *)uip_appdata,
++ (u16_t)(((((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - 40)));
+
-+/**
-+ * \internal
-+ *
-+ * Check if a connection has outstanding (i.e., unacknowledged) data.
-+ *
-+ * \param conn A pointer to the uip_conn structure for the connection.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_outstanding(conn) ((conn)->len)
++ if((sum += hsum) < hsum) {
++ ++sum;
++ }
++
++ if((sum += BUF->srcipaddr[0]) < BUF->srcipaddr[0]) {
++ ++sum;
++ }
++ if((sum += BUF->srcipaddr[1]) < BUF->srcipaddr[1]) {
++ ++sum;
++ }
++ if((sum += BUF->destipaddr[0]) < BUF->destipaddr[0]) {
++ ++sum;
++ }
++ if((sum += BUF->destipaddr[1]) < BUF->destipaddr[1]) {
++ ++sum;
++ }
++ if((sum += (u16_t)htons((u16_t)IP_PROTO_TCP)) < (u16_t)htons((u16_t)IP_PROTO_TCP)) {
++ ++sum;
++ }
+
++ hsum = (u16_t)htons((((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - 20);
++
++ if((sum += hsum) < hsum) {
++ ++sum;
++ }
++
++ return sum;
++}
++/*-----------------------------------------------------------------------------------*/
+--- /dev/null
++++ b/net/uip-0.9/uip_arch.h
+@@ -0,0 +1,130 @@
+/**
-+ * Send data on the current connection.
-+ *
-+ * This function is used to send out a single segment of TCP
-+ * data. Only applications that have been invoked by uIP for event
-+ * processing can send data.
++ * \defgroup uiparch Architecture specific uIP functions
++ * @{
+ *
-+ * The amount of data that actually is sent out after a call to this
-+ * funcion is determined by the maximum amount of data TCP allows. uIP
-+ * will automatically crop the data so that only the appropriate
-+ * amount of data is sent. The function uip_mss() can be used to query
-+ * uIP for the amount of data that actually will be sent.
-+ *
-+ * \note This function does not guarantee that the sent data will
-+ * arrive at the destination. If the data is lost in the network, the
-+ * application will be invoked with the uip_rexmit() event being
-+ * set. The application will then have to resend the data using this
-+ * function.
-+ *
-+ * \param data A pointer to the data which is to be sent.
++ * The functions in the architecture specific module implement the IP
++ * check sum and 32-bit additions.
+ *
-+ * \param len The maximum amount of data bytes to be sent.
++ * The IP checksum calculation is the most computationally expensive
++ * operation in the TCP/IP stack and it therefore pays off to
++ * implement this in efficient assembler. The purpose of the uip-arch
++ * module is to let the checksum functions to be implemented in
++ * architecture specific assembler.
+ *
-+ * \hideinitializer
+ */
-+#define uip_send(data, len) do { uip_sappdata = (data); uip_slen = (len);} while(0)
+
+/**
-+ * The length of any incoming data that is currently avaliable (if avaliable)
-+ * in the uip_appdata buffer.
-+ *
-+ * The test function uip_data() must first be used to check if there
-+ * is any data available at all.
-+ *
-+ * \hideinitializer
++ * \file
++ * Declarations of architecture specific functions.
++ * \author Adam Dunkels <adam@dunkels.com>
+ */
-+#define uip_datalen() uip_len
+
-+/**
-+ * The length of any out-of-band data (urgent data) that has arrived
-+ * on the connection.
-+ *
-+ * \note The configuration parameter UIP_URGDATA must be set for this
-+ * function to be enabled.
++/*
++ * Copyright (c) 2001, Adam Dunkels.
++ * All rights reserved.
+ *
-+ * \hideinitializer
-+ */
-+#define uip_urgdatalen() uip_urglen
-+
-+/**
-+ * Close the current connection.
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote
++ * products derived from this software without specific prior
++ * written permission.
+ *
-+ * This function will close the current connection in a nice way.
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
++ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
++ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
++ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
++ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
++ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
-+ * \hideinitializer
-+ */
-+#define uip_close() (uip_flags = UIP_CLOSE)
-+
-+/**
-+ * Abort the current connection.
++ * This file is part of the uIP TCP/IP stack.
+ *
-+ * This function will abort (reset) the current connection, and is
-+ * usually used when an error has occured that prevents using the
-+ * uip_close() function.
++ * $Id: uip_arch.h,v 1.1.2.2 2003/10/06 15:10:22 adam Exp $
+ *
-+ * \hideinitializer
+ */
-+#define uip_abort() (uip_flags = UIP_ABORT)
+
-+/**
-+ * Tell the sending host to stop sending data.
-+ *
-+ * This function will close our receiver's window so that we stop
-+ * receiving data for the current connection.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
++#ifndef __UIP_ARCH_H__
++#define __UIP_ARCH_H__
+
-+/**
-+ * Find out if the current connection has been previously stopped with
-+ * uip_stop().
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED)
++#include "uip.h"
+
+/**
-+ * Restart the current connection, if is has previously been stopped
-+ * with uip_stop().
++ * Carry out a 32-bit addition.
+ *
-+ * This function will open the receiver's window again so that we
-+ * start receiving data for the current connection.
++ * Because not all architectures for which uIP is intended has native
++ * 32-bit arithmetic, uIP uses an external C function for doing the
++ * required 32-bit additions in the TCP protocol processing. This
++ * function should add the two arguments and place the result in the
++ * global variable uip_acc32.
+ *
-+ * \hideinitializer
-+ */
-+#define uip_restart() do { uip_flags |= UIP_NEWDATA; \
-+ uip_conn->tcpstateflags &= ~UIP_STOPPED; \
-+ } while(0)
-+
-+
-+/* uIP tests that can be made to determine in what state the current
-+ connection is, and what the application function should do. */
-+
-+/**
-+ * Is new incoming data available?
++ * \note The 32-bit integer pointed to by the op32 parameter and the
++ * result in the uip_acc32 variable are in network byte order (big
++ * endian).
+ *
-+ * Will reduce to non-zero if there is new data for the application
-+ * present at the uip_appdata pointer. The size of the data is
-+ * avaliable through the uip_len variable.
++ * \param op32 A pointer to a 4-byte array representing a 32-bit
++ * integer in network byte order (big endian).
+ *
-+ * \hideinitializer
++ * \param op16 A 16-bit integer in host byte order.
+ */
-+#define uip_newdata() (uip_flags & UIP_NEWDATA)
++void uip_add32(u8_t *op32, u16_t op16);
+
+/**
-+ * Has previously sent data been acknowledged?
++ * Calculate the Internet checksum over a buffer.
+ *
-+ * Will reduce to non-zero if the previously sent data has been
-+ * acknowledged by the remote host. This means that the application
-+ * can send new data.
++ * The Internet checksum is the one's complement of the one's
++ * complement sum of all 16-bit words in the buffer.
+ *
-+ * \hideinitializer
++ * See RFC1071.
++ *
++ * \note This function is not called in the current version of uIP,
++ * but future versions might make use of it.
++ *
++ * \param buf A pointer to the buffer over which the checksum is to be
++ * computed.
++ *
++ * \param len The length of the buffer over which the checksum is to
++ * be computed.
++ *
++ * \return The Internet checksum of the buffer.
+ */
-+#define uip_acked() (uip_flags & UIP_ACKDATA)
++u16_t uip_chksum(u16_t *buf, u16_t len);
+
+/**
-+ * Has the connection just been connected?
++ * Calculate the IP header checksum of the packet header in uip_buf.
+ *
-+ * Reduces to non-zero if the current connection has been connected to
-+ * a remote host. This will happen both if the connection has been
-+ * actively opened (with uip_connect()) or passively opened (with
-+ * uip_listen()).
++ * The IP header checksum is the Internet checksum of the 20 bytes of
++ * the IP header.
+ *
-+ * \hideinitializer
++ * \return The IP header checksum of the IP header in the uip_buf
++ * buffer.
+ */
-+#define uip_connected() (uip_flags & UIP_CONNECTED)
++u16_t uip_ipchksum(void);
+
+/**
-+ * Has the connection been closed by the other end?
++ * Calculate the TCP checksum of the packet in uip_buf and uip_appdata.
+ *
-+ * Is non-zero if the connection has been closed by the remote
-+ * host. The application may then do the necessary clean-ups.
++ * The TCP checksum is the Internet checksum of data contents of the
++ * TCP segment, and a pseudo-header as defined in RFC793.
+ *
-+ * \hideinitializer
++ * \note The uip_appdata pointer that points to the packet data may
++ * point anywhere in memory, so it is not possible to simply calculate
++ * the Internet checksum of the contents of the uip_buf buffer.
++ *
++ * \return The TCP checksum of the TCP segment in uip_buf and pointed
++ * to by uip_appdata.
+ */
-+#define uip_closed() (uip_flags & UIP_CLOSE)
++u16_t uip_tcpchksum(void);
++
++/** @} */
+
++#endif /* __UIP_ARCH_H__ */
+--- /dev/null
++++ b/net/uip-0.9/uip_arp.c
+@@ -0,0 +1,421 @@
+/**
-+ * Has the connection been aborted by the other end?
-+ *
-+ * Non-zero if the current connection has been aborted (reset) by the
-+ * remote host.
-+ *
-+ * \hideinitializer
++ * \addtogroup uip
++ * @{
+ */
-+#define uip_aborted() (uip_flags & UIP_ABORT)
+
+/**
-+ * Has the connection timed out?
++ * \defgroup uiparp uIP Address Resolution Protocol
++ * @{
++ *
++ * The Address Resolution Protocol ARP is used for mapping between IP
++ * addresses and link level addresses such as the Ethernet MAC
++ * addresses. ARP uses broadcast queries to ask for the link level
++ * address of a known IP address and the host which is configured with
++ * the IP address for which the query was meant, will respond with its
++ * link level address.
+ *
-+ * Non-zero if the current connection has been aborted due to too many
-+ * retransmissions.
++ * \note This ARP implementation only supports Ethernet.
++ */
++
++/**
++ * \file
++ * Implementation of the ARP Address Resolution Protocol.
++ * \author Adam Dunkels <adam@dunkels.com>
+ *
-+ * \hideinitializer
+ */
-+#define uip_timedout() (uip_flags & UIP_TIMEDOUT)
+
-+/**
-+ * Do we need to retransmit previously data?
++/*
++ * Copyright (c) 2001-2003, Adam Dunkels.
++ * All rights reserved.
+ *
-+ * Reduces to non-zero if the previously sent data has been lost in
-+ * the network, and the application should retransmit it. The
-+ * application should send the exact same data as it did the last
-+ * time, using the uip_send() function.
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote
++ * products derived from this software without specific prior
++ * written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
++ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
++ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
++ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
++ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
++ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * This file is part of the uIP TCP/IP stack.
++ *
++ * $Id: uip_arp.c,v 1.7.2.3 2003/10/06 22:42:30 adam Exp $
+ *
-+ * \hideinitializer
+ */
-+#define uip_rexmit() (uip_flags & UIP_REXMIT)
+
++
++#include "uip_arp.h"
++
++struct arp_hdr {
++ struct uip_eth_hdr ethhdr;
++ u16_t hwtype;
++ u16_t protocol;
++ u8_t hwlen;
++ u8_t protolen;
++ u16_t opcode;
++ struct uip_eth_addr shwaddr;
++ u16_t sipaddr[2];
++ struct uip_eth_addr dhwaddr;
++ u16_t dipaddr[2];
++};
++
++struct ethip_hdr {
++ struct uip_eth_hdr ethhdr;
++ /* IP header. */
++ u8_t vhl,
++ tos,
++ len[2],
++ ipid[2],
++ ipoffset[2],
++ ttl,
++ proto;
++ u16_t ipchksum;
++ u16_t srcipaddr[2],
++ destipaddr[2];
++};
++
++#define ARP_REQUEST 1
++#define ARP_REPLY 2
++
++#define ARP_HWTYPE_ETH 1
++
++struct arp_entry {
++ u16_t ipaddr[2];
++ struct uip_eth_addr ethaddr;
++ u8_t time;
++};
++
++struct uip_eth_addr uip_ethaddr = {{UIP_ETHADDR0,
++ UIP_ETHADDR1,
++ UIP_ETHADDR2,
++ UIP_ETHADDR3,
++ UIP_ETHADDR4,
++ UIP_ETHADDR5}};
++
++static struct arp_entry arp_table[UIP_ARPTAB_SIZE];
++static u16_t ipaddr[2];
++static u8_t i, c;
++
++static u8_t arptime;
++static u8_t tmpage;
++
++#define BUF ((struct arp_hdr *)&uip_buf[0])
++#define IPBUF ((struct ethip_hdr *)&uip_buf[0])
++/*-----------------------------------------------------------------------------------*/
+/**
-+ * Is the connection being polled by uIP?
++ * Initialize the ARP module.
+ *
-+ * Is non-zero if the reason the application is invoked is that the
-+ * current connection has been idle for a while and should be
-+ * polled.
++ */
++/*-----------------------------------------------------------------------------------*/
++void
++uip_arp_init(void)
++{
++ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++ memset(arp_table[i].ipaddr, 0, 4);
++ }
++}
++/*-----------------------------------------------------------------------------------*/
++/**
++ * Periodic ARP processing function.
+ *
-+ * The polling event can be used for sending data without having to
-+ * wait for the remote host to send data.
++ * This function performs periodic timer processing in the ARP module
++ * and should be called at regular intervals. The recommended interval
++ * is 10 seconds between the calls.
+ *
-+ * \hideinitializer
-+ */
-+#define uip_poll() (uip_flags & UIP_POLL)
++ */
++/*-----------------------------------------------------------------------------------*/
++void
++uip_arp_timer(void)
++{
++ struct arp_entry *tabptr;
++
++ ++arptime;
++ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++ tabptr = &arp_table[i];
++ if((tabptr->ipaddr[0] | tabptr->ipaddr[1]) != 0 &&
++ arptime - tabptr->time >= UIP_ARP_MAXAGE) {
++ memset(tabptr->ipaddr, 0, 4);
++ }
++ }
++
++}
++/*-----------------------------------------------------------------------------------*/
++static void
++uip_arp_update(u16_t *ipaddr, struct uip_eth_addr *ethaddr)
++{
++ register struct arp_entry *tabptr;
++ /* Walk through the ARP mapping table and try to find an entry to
++ update. If none is found, the IP -> MAC address mapping is
++ inserted in the ARP table. */
++ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++
++ tabptr = &arp_table[i];
++ /* Only check those entries that are actually in use. */
++ if(tabptr->ipaddr[0] != 0 &&
++ tabptr->ipaddr[1] != 0) {
++
++ /* Check if the source IP address of the incoming packet matches
++ the IP address in this ARP table entry. */
++ if(ipaddr[0] == tabptr->ipaddr[0] &&
++ ipaddr[1] == tabptr->ipaddr[1]) {
++
++ /* An old entry found, update this and return. */
++ memcpy(tabptr->ethaddr.addr, ethaddr->addr, 6);
++ tabptr->time = arptime;
++
++ return;
++ }
++ }
++ }
+
-+/**
-+ * Get the initial maxium segment size (MSS) of the current
-+ * connection.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_initialmss() (uip_conn->initialmss)
++ /* If we get here, no existing ARP table entry was found, so we
++ create one. */
+
-+/**
-+ * Get the current maxium segment size that can be sent on the current
-+ * connection.
-+ *
-+ * The current maxiumum segment size that can be sent on the
-+ * connection is computed from the receiver's window and the MSS of
-+ * the connection (which also is available by calling
-+ * uip_initialmss()).
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_mss() (uip_conn->mss)
++ /* First, we try to find an unused entry in the ARP table. */
++ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++ tabptr = &arp_table[i];
++ if(tabptr->ipaddr[0] == 0 &&
++ tabptr->ipaddr[1] == 0) {
++ break;
++ }
++ }
+
-+/**
-+ * Set up a new UDP connection.
-+ *
-+ * \param ripaddr A pointer to a 4-byte structure representing the IP
-+ * address of the remote host.
-+ *
-+ * \param rport The remote port number in network byte order.
-+ *
-+ * \return The uip_udp_conn structure for the new connection or NULL
-+ * if no connection could be allocated.
-+ */
-+struct uip_udp_conn *uip_udp_new(u16_t *ripaddr, u16_t rport);
++ /* If no unused entry is found, we try to find the oldest entry and
++ throw it away. */
++ if(i == UIP_ARPTAB_SIZE) {
++ tmpage = 0;
++ c = 0;
++ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++ tabptr = &arp_table[i];
++ if(arptime - tabptr->time > tmpage) {
++ tmpage = arptime - tabptr->time;
++ c = i;
++ }
++ }
++ i = c;
++ }
+
++ /* Now, i is the ARP table entry which we will fill with the new
++ information. */
++ memcpy(tabptr->ipaddr, ipaddr, 4);
++ memcpy(tabptr->ethaddr.addr, ethaddr->addr, 6);
++ tabptr->time = arptime;
++}
++/*-----------------------------------------------------------------------------------*/
+/**
-+ * Removed a UDP connection.
++ * ARP processing for incoming IP packets
+ *
-+ * \param conn A pointer to the uip_udp_conn structure for the connection.
++ * This function should be called by the device driver when an IP
++ * packet has been received. The function will check if the address is
++ * in the ARP cache, and if so the ARP cache entry will be
++ * refreshed. If no ARP cache entry was found, a new one is created.
+ *
-+ * \hideinitializer
++ * This function expects an IP packet with a prepended Ethernet header
++ * in the uip_buf[] buffer, and the length of the packet in the global
++ * variable uip_len.
+ */
-+#define uip_udp_remove(conn) (conn)->lport = 0
-+
++/*-----------------------------------------------------------------------------------*/
++void
++uip_arp_ipin(void)
++{
++ uip_len -= sizeof(struct uip_eth_hdr);
++
++ /* Only insert/update an entry if the source IP address of the
++ incoming IP packet comes from a host on the local network. */
++ if((IPBUF->srcipaddr[0] & uip_arp_netmask[0]) !=
++ (uip_hostaddr[0] & uip_arp_netmask[0])) {
++ return;
++ }
++ if((IPBUF->srcipaddr[1] & uip_arp_netmask[1]) !=
++ (uip_hostaddr[1] & uip_arp_netmask[1])) {
++ return;
++ }
++ uip_arp_update(IPBUF->srcipaddr, &(IPBUF->ethhdr.src));
++
++ return;
++}
++/*-----------------------------------------------------------------------------------*/
+/**
-+ * Send a UDP datagram of length len on the current connection.
++ * ARP processing for incoming ARP packets.
+ *
-+ * This function can only be called in response to a UDP event (poll
-+ * or newdata). The data must be present in the uip_buf buffer, at the
-+ * place pointed to by the uip_appdata pointer.
++ * This function should be called by the device driver when an ARP
++ * packet has been received. The function will act differently
++ * depending on the ARP packet type: if it is a reply for a request
++ * that we previously sent out, the ARP cache will be filled in with
++ * the values from the ARP reply. If the incoming ARP packet is an ARP
++ * request for our IP address, an ARP reply packet is created and put
++ * into the uip_buf[] buffer.
+ *
-+ * \param len The length of the data in the uip_buf buffer.
++ * When the function returns, the value of the global variable uip_len
++ * indicates whether the device driver should send out a packet or
++ * not. If uip_len is zero, no packet should be sent. If uip_len is
++ * non-zero, it contains the length of the outbound packet that is
++ * present in the uip_buf[] buffer.
+ *
-+ * \hideinitializer
++ * This function expects an ARP packet with a prepended Ethernet
++ * header in the uip_buf[] buffer, and the length of the packet in the
++ * global variable uip_len.
+ */
-+#define uip_udp_send(len) uip_slen = (len)
-+
-+/** @} */
++/*-----------------------------------------------------------------------------------*/
++void
++uip_arp_arpin(void)
++{
+
-+/* uIP convenience and converting functions. */
++ if(uip_len < sizeof(struct arp_hdr)) {
++ uip_len = 0;
++ return;
++ }
+
-+/**
-+ * \defgroup uipconvfunc uIP conversion functions
-+ * @{
-+ *
-+ * These functions can be used for converting between different data
-+ * formats used by uIP.
-+ */
-+
-+/**
-+ * Pack an IP address into a 4-byte array which is used by uIP to
-+ * represent IP addresses.
-+ *
-+ * Example:
-+ \code
-+ u16_t ipaddr[2];
++ uip_len = 0;
+
-+ uip_ipaddr(&ipaddr, 192,168,1,2);
-+ \endcode
-+ *
-+ * \param addr A pointer to a 4-byte array that will be filled in with
-+ * the IP addres.
-+ * \param addr0 The first octet of the IP address.
-+ * \param addr1 The second octet of the IP address.
-+ * \param addr2 The third octet of the IP address.
-+ * \param addr3 The forth octet of the IP address.
-+ *
-+ * \hideinitializer
-+ */
-+#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
-+ (addr)[0] = HTONS(((addr0) << 8) | (addr1)); \
-+ (addr)[1] = HTONS(((addr2) << 8) | (addr3)); \
-+ } while(0)
++ switch(BUF->opcode) {
++ case HTONS(ARP_REQUEST):
++ /* ARP request. If it asked for our address, we send out a
++ reply. */
++ if(BUF->dipaddr[0] == uip_hostaddr[0] &&
++ BUF->dipaddr[1] == uip_hostaddr[1]) {
++ /* The reply opcode is 2. */
++ BUF->opcode = HTONS(2);
+
-+/**
-+ * Convert 16-bit quantity from host byte order to network byte order.
-+ *
-+ * This macro is primarily used for converting constants from host
-+ * byte order to network byte order. For converting variables to
-+ * network byte order, use the htons() function instead.
-+ *
-+ * \hideinitializer
-+ */
-+#ifndef HTONS
-+# if BYTE_ORDER == BIG_ENDIAN
-+# define HTONS(n) (n)
-+# else /* BYTE_ORDER == BIG_ENDIAN */
-+# define HTONS(n) ((((u16_t)((n) & 0xff)) << 8) | (((n) & 0xff00) >> 8))
-+# endif /* BYTE_ORDER == BIG_ENDIAN */
-+#endif /* HTONS */
++ memcpy(BUF->dhwaddr.addr, BUF->shwaddr.addr, 6);
++ memcpy(BUF->shwaddr.addr, uip_ethaddr.addr, 6);
++ memcpy(BUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
++ memcpy(BUF->ethhdr.dest.addr, BUF->dhwaddr.addr, 6);
++
++ BUF->dipaddr[0] = BUF->sipaddr[0];
++ BUF->dipaddr[1] = BUF->sipaddr[1];
++ BUF->sipaddr[0] = uip_hostaddr[0];
++ BUF->sipaddr[1] = uip_hostaddr[1];
+
-+/**
-+ * Convert 16-bit quantity from host byte order to network byte order.
-+ *
-+ * This function is primarily used for converting variables from host
-+ * byte order to network byte order. For converting constants to
-+ * network byte order, use the HTONS() macro instead.
-+ */
-+#ifndef htons
-+u16_t htons(u16_t val);
-+#endif /* htons */
++ BUF->ethhdr.type = HTONS(UIP_ETHTYPE_ARP);
++ uip_len = sizeof(struct arp_hdr);
++ }
++ break;
++ case HTONS(ARP_REPLY):
++ /* ARP reply. We insert or update the ARP table if it was meant
++ for us. */
++ if(BUF->dipaddr[0] == uip_hostaddr[0] &&
++ BUF->dipaddr[1] == uip_hostaddr[1]) {
+
-+/** @} */
++ uip_arp_update(BUF->sipaddr, &BUF->shwaddr);
++ }
++ break;
++ }
+
++ return;
++}
++/*-----------------------------------------------------------------------------------*/
+/**
-+ * Pointer to the application data in the packet buffer.
++ * Prepend Ethernet header to an outbound IP packet and see if we need
++ * to send out an ARP request.
+ *
-+ * This pointer points to the application data when the application is
-+ * called. If the application wishes to send data, the application may
-+ * use this space to write the data into before calling uip_send().
-+ */
-+extern volatile u8_t *uip_appdata;
-+extern volatile u8_t *uip_sappdata;
-+
-+#if UIP_URGDATA > 0
-+/* u8_t *uip_urgdata:
++ * This function should be called before sending out an IP packet. The
++ * function checks the destination IP address of the IP packet to see
++ * what Ethernet MAC address that should be used as a destination MAC
++ * address on the Ethernet.
+ *
-+ * This pointer points to any urgent data that has been received. Only
-+ * present if compiled with support for urgent data (UIP_URGDATA).
++ * If the destination IP address is in the local network (determined
++ * by logical ANDing of netmask and our IP address), the function
++ * checks the ARP cache to see if an entry for the destination IP
++ * address is found. If so, an Ethernet header is prepended and the
++ * function returns. If no ARP cache entry is found for the
++ * destination IP address, the packet in the uip_buf[] is replaced by
++ * an ARP request packet for the IP address. The IP packet is dropped
++ * and it is assumed that they higher level protocols (e.g., TCP)
++ * eventually will retransmit the dropped packet.
++ *
++ * If the destination IP address is not on the local network, the IP
++ * address of the default router is used instead.
++ *
++ * When the function returns, a packet is present in the uip_buf[]
++ * buffer, and the length of the packet is in the global variable
++ * uip_len.
+ */
-+extern volatile u8_t *uip_urgdata;
-+#endif /* UIP_URGDATA > 0 */
++/*-----------------------------------------------------------------------------------*/
++void
++uip_arp_out(void)
++{
++ struct arp_entry *tabptr;
++ /* Find the destination IP address in the ARP table and construct
++ the Ethernet header. If the destination IP addres isn't on the
++ local network, we use the default router's IP address instead.
+
++ If not ARP table entry is found, we overwrite the original IP
++ packet with an ARP request for the IP address. */
+
-+/* u[8|16]_t uip_len:
-+ *
-+ * When the application is called, uip_len contains the length of any
-+ * new data that has been received from the remote host. The
-+ * application should set this variable to the size of any data that
-+ * the application wishes to send. When the network device driver
-+ * output function is called, uip_len should contain the length of the
-+ * outgoing packet.
-+ */
-+extern volatile u16_t uip_len, uip_slen;
++ /* Check if the destination address is on the local network. */
++ if((IPBUF->destipaddr[0] & uip_arp_netmask[0]) !=
++ (uip_hostaddr[0] & uip_arp_netmask[0]) ||
++ (IPBUF->destipaddr[1] & uip_arp_netmask[1]) !=
++ (uip_hostaddr[1] & uip_arp_netmask[1])) {
++ /* Destination address was not on the local network, so we need to
++ use the default router's IP address instead of the destination
++ address when determining the MAC address. */
++ ipaddr[0] = uip_arp_draddr[0];
++ ipaddr[1] = uip_arp_draddr[1];
++ } else {
++ /* Else, we use the destination IP address. */
++ ipaddr[0] = IPBUF->destipaddr[0];
++ ipaddr[1] = IPBUF->destipaddr[1];
++ }
++
++ for(i = 0; i < UIP_ARPTAB_SIZE; ++i) {
++ tabptr = &arp_table[i];
++ if(ipaddr[0] == tabptr->ipaddr[0] &&
++ ipaddr[1] == tabptr->ipaddr[1])
++ break;
++ }
+
-+#if UIP_URGDATA > 0
-+extern volatile u8_t uip_urglen, uip_surglen;
-+#endif /* UIP_URGDATA > 0 */
++ if(i == UIP_ARPTAB_SIZE) {
++ /* The destination address was not in our ARP table, so we
++ overwrite the IP packet with an ARP request. */
++
++ memset(BUF->ethhdr.dest.addr, 0xff, 6);
++ memset(BUF->dhwaddr.addr, 0x00, 6);
++ memcpy(BUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
++ memcpy(BUF->shwaddr.addr, uip_ethaddr.addr, 6);
++
++ BUF->dipaddr[0] = ipaddr[0];
++ BUF->dipaddr[1] = ipaddr[1];
++ BUF->sipaddr[0] = uip_hostaddr[0];
++ BUF->sipaddr[1] = uip_hostaddr[1];
++ BUF->opcode = HTONS(ARP_REQUEST); /* ARP request. */
++ BUF->hwtype = HTONS(ARP_HWTYPE_ETH);
++ BUF->protocol = HTONS(UIP_ETHTYPE_IP);
++ BUF->hwlen = 6;
++ BUF->protolen = 4;
++ BUF->ethhdr.type = HTONS(UIP_ETHTYPE_ARP);
+
++ uip_appdata = &uip_buf[40 + UIP_LLH_LEN];
++
++ uip_len = sizeof(struct arp_hdr);
++ return;
++ }
+
-+/**
-+ * Representation of a uIP TCP connection.
-+ *
-+ * The uip_conn structure is used for identifying a connection. All
-+ * but one field in the structure are to be considered read-only by an
-+ * application. The only exception is the appstate field whos purpose
-+ * is to let the application store application-specific state (e.g.,
-+ * file pointers) for the connection. The size of this field is
-+ * configured in the "uipopt.h" header file.
-+ */
-+struct uip_conn {
-+ u16_t ripaddr[2]; /**< The IP address of the remote host. */
-+
-+ u16_t lport; /**< The local TCP port, in network byte order. */
-+ u16_t rport; /**< The local remote TCP port, in network byte
-+ order. */
++ /* Build an ethernet header. */
++ memcpy(IPBUF->ethhdr.dest.addr, tabptr->ethaddr.addr, 6);
++ memcpy(IPBUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
+
-+ u8_t rcv_nxt[4]; /**< The sequence number that we expect to
-+ receive next. */
-+ u8_t snd_nxt[4]; /**< The sequence number that was last sent by
-+ us. */
-+ u16_t len; /**< Length of the data that was previously sent. */
-+ u16_t mss; /**< Current maximum segment size for the
-+ connection. */
-+ u16_t initialmss; /**< Initial maximum segment size for the
-+ connection. */
-+ u8_t sa; /**< Retransmission time-out calculation state
-+ variable. */
-+ u8_t sv; /**< Retransmission time-out calculation state
-+ variable. */
-+ u8_t rto; /**< Retransmission time-out. */
-+ u8_t tcpstateflags; /**< TCP state and flags. */
-+ u8_t timer; /**< The retransmission timer. */
-+ u8_t nrtx; /**< The number of retransmissions for the last
-+ segment sent. */
-+
-+ /** The application state. */
-+ u8_t appstate[UIP_APPSTATE_SIZE];
-+};
++ IPBUF->ethhdr.type = HTONS(UIP_ETHTYPE_IP);
+
++ uip_len += sizeof(struct uip_eth_hdr);
++}
++/*-----------------------------------------------------------------------------------*/
+
-+/* Pointer to the current connection. */
-+extern struct uip_conn *uip_conn;
-+/* The array containing all uIP connections. */
-+extern struct uip_conn uip_conns[UIP_CONNS];
++/** @} */
++/** @} */
+--- /dev/null
++++ b/net/uip-0.9/uip_arp.h
+@@ -0,0 +1,201 @@
+/**
-+ * \addtogroup uiparch
++ * \addtogroup uip
+ * @{
+ */
+
+/**
-+ * 4-byte array used for the 32-bit sequence number calculations.
++ * \addtogroup uiparp
++ * @{
+ */
-+extern volatile u8_t uip_acc32[4];
-+
-+/** @} */
-+
-+
-+#if UIP_UDP
++
+/**
-+ * Representation of a uIP UDP connection.
++ * \file
++ * Macros and definitions for the ARP module.
++ * \author Adam Dunkels <adam@dunkels.com>
+ */
-+struct uip_udp_conn {
-+ u16_t ripaddr[2]; /**< The IP address of the remote peer. */
-+ u16_t lport; /**< The local port number in network byte order. */
-+ u16_t rport; /**< The remote port number in network byte order. */
-+};
-+
-+extern struct uip_udp_conn *uip_udp_conn;
-+extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
-+#endif /* UIP_UDP */
++
+
-+/**
-+ * The structure holding the TCP/IP statistics that are gathered if
-+ * UIP_STATISTICS is set to 1.
++/*
++ * Copyright (c) 2001-2003, Adam Dunkels.
++ * All rights reserved.
+ *
-+ */
-+struct uip_stats {
-+ struct {
-+ uip_stats_t drop; /**< Number of dropped packets at the IP
-+ layer. */
-+ uip_stats_t recv; /**< Number of received packets at the IP
-+ layer. */
-+ uip_stats_t sent; /**< Number of sent packets at the IP
-+ layer. */
-+ uip_stats_t vhlerr; /**< Number of packets dropped due to wrong
-+ IP version or header length. */
-+ uip_stats_t hblenerr; /**< Number of packets dropped due to wrong
-+ IP length, high byte. */
-+ uip_stats_t lblenerr; /**< Number of packets dropped due to wrong
-+ IP length, low byte. */
-+ uip_stats_t fragerr; /**< Number of packets dropped since they
-+ were IP fragments. */
-+ uip_stats_t chkerr; /**< Number of packets dropped due to IP
-+ checksum errors. */
-+ uip_stats_t protoerr; /**< Number of packets dropped since they
-+ were neither ICMP, UDP nor TCP. */
-+ } ip; /**< IP statistics. */
-+ struct {
-+ uip_stats_t drop; /**< Number of dropped ICMP packets. */
-+ uip_stats_t recv; /**< Number of received ICMP packets. */
-+ uip_stats_t sent; /**< Number of sent ICMP packets. */
-+ uip_stats_t typeerr; /**< Number of ICMP packets with a wrong
-+ type. */
-+ } icmp; /**< ICMP statistics. */
-+ struct {
-+ uip_stats_t drop; /**< Number of dropped TCP segments. */
-+ uip_stats_t recv; /**< Number of recived TCP segments. */
-+ uip_stats_t sent; /**< Number of sent TCP segments. */
-+ uip_stats_t chkerr; /**< Number of TCP segments with a bad
-+ checksum. */
-+ uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK
-+ number. */
-+ uip_stats_t rst; /**< Number of recevied TCP RST (reset) segments. */
-+ uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */
-+ uip_stats_t syndrop; /**< Number of dropped SYNs due to too few
-+ connections was avaliable. */
-+ uip_stats_t synrst; /**< Number of SYNs for closed ports,
-+ triggering a RST. */
-+ } tcp; /**< TCP statistics. */
-+};
-+
-+/**
-+ * The uIP TCP/IP statistics.
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote
++ * products derived from this software without specific prior
++ * written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
++ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
++ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
++ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
++ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
++ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * This file is part of the uIP TCP/IP stack.
++ *
++ * $Id: uip_arp.h,v 1.3.2.2 2003/10/06 15:10:22 adam Exp $
+ *
-+ * This is the variable in which the uIP TCP/IP statistics are gathered.
+ */
-+extern struct uip_stats uip_stat;
+
++#ifndef __UIP_ARP_H__
++#define __UIP_ARP_H__
+
-+/*-----------------------------------------------------------------------------------*/
-+/* All the stuff below this point is internal to uIP and should not be
-+ * used directly by an application or by a device driver.
-+ */
-+/*-----------------------------------------------------------------------------------*/
-+/* u8_t uip_flags:
-+ *
-+ * When the application is called, uip_flags will contain the flags
-+ * that are defined in this file. Please read below for more
-+ * infomation.
++#include "uip.h"
++
++
++/**
++ * Representation of a 48-bit Ethernet address.
+ */
-+extern volatile u8_t uip_flags;
++struct uip_eth_addr {
++ u8_t addr[6];
++};
+
-+/* The following flags may be set in the global variable uip_flags
-+ before calling the application callback. The UIP_ACKDATA and
-+ UIP_NEWDATA flags may both be set at the same time, whereas the
-+ others are mutualy exclusive. Note that these flags should *NOT* be
-+ accessed directly, but through the uIP functions/macros. */
++extern struct uip_eth_addr uip_ethaddr;
+
-+#define UIP_ACKDATA 1 /* Signifies that the outstanding data was
-+ acked and the application should send
-+ out new data instead of retransmitting
-+ the last data. */
-+#define UIP_NEWDATA 2 /* Flags the fact that the peer has sent
-+ us new data. */
-+#define UIP_REXMIT 4 /* Tells the application to retransmit the
-+ data that was last sent. */
-+#define UIP_POLL 8 /* Used for polling the application, to
-+ check if the application has data that
-+ it wants to send. */
-+#define UIP_CLOSE 16 /* The remote host has closed the
-+ connection, thus the connection has
-+ gone away. Or the application signals
-+ that it wants to close the
-+ connection. */
-+#define UIP_ABORT 32 /* The remote host has aborted the
-+ connection, thus the connection has
-+ gone away. Or the application signals
-+ that it wants to abort the
-+ connection. */
-+#define UIP_CONNECTED 64 /* We have got a connection from a remote
-+ host and have set up a new connection
-+ for it, or an active connection has
-+ been successfully established. */
++/**
++ * The Ethernet header.
++ */
++struct uip_eth_hdr {
++ struct uip_eth_addr dest;
++ struct uip_eth_addr src;
++ u16_t type;
++};
+
-+#define UIP_TIMEDOUT 128 /* The connection has been aborted due to
-+ too many retransmissions. */
++#define UIP_ETHTYPE_ARP 0x0806
++#define UIP_ETHTYPE_IP 0x0800
++#define UIP_ETHTYPE_IP6 0x86dd
+
+
-+/* uip_process(flag):
-+ *
-+ * The actual uIP function which does all the work.
-+ */
-+void uip_process(u8_t flag);
++/* The uip_arp_init() function must be called before any of the other
++ ARP functions. */
++void uip_arp_init(void);
+
-+/* The following flags are passed as an argument to the uip_process()
-+ function. They are used to distinguish between the two cases where
-+ uip_process() is called. It can be called either because we have
-+ incoming data that should be processed, or because the periodic
-+ timer has fired. */
++/* The uip_arp_ipin() function should be called whenever an IP packet
++ arrives from the Ethernet. This function refreshes the ARP table or
++ inserts a new mapping if none exists. The function assumes that an
++ IP packet with an Ethernet header is present in the uip_buf buffer
++ and that the length of the packet is in the uip_len variable. */
++void uip_arp_ipin(void);
+
-+#define UIP_DATA 1 /* Tells uIP that there is incoming data in
-+ the uip_buf buffer. The length of the
-+ data is stored in the global variable
-+ uip_len. */
-+#define UIP_TIMER 2 /* Tells uIP that the periodic timer has
-+ fired. */
-+#if UIP_UDP
-+#define UIP_UDP_TIMER 3
-+#endif /* UIP_UDP */
++/* The uip_arp_arpin() should be called when an ARP packet is received
++ by the Ethernet driver. This function also assumes that the
++ Ethernet frame is present in the uip_buf buffer. When the
++ uip_arp_arpin() function returns, the contents of the uip_buf
++ buffer should be sent out on the Ethernet if the uip_len variable
++ is > 0. */
++void uip_arp_arpin(void);
+
-+/* The TCP states used in the uip_conn->tcpstateflags. */
-+#define CLOSED 0
-+#define SYN_RCVD 1
-+#define SYN_SENT 2
-+#define ESTABLISHED 3
-+#define FIN_WAIT_1 4
-+#define FIN_WAIT_2 5
-+#define CLOSING 6
-+#define TIME_WAIT 7
-+#define LAST_ACK 8
-+#define TS_MASK 15
-+
-+#define UIP_STOPPED 16
++/* The uip_arp_out() function should be called when an IP packet
++ should be sent out on the Ethernet. This function creates an
++ Ethernet header before the IP header in the uip_buf buffer. The
++ Ethernet header will have the correct Ethernet MAC destination
++ address filled in if an ARP table entry for the destination IP
++ address (or the IP address of the default router) is present. If no
++ such table entry is found, the IP packet is overwritten with an ARP
++ request and we rely on TCP to retransmit the packet that was
++ overwritten. In any case, the uip_len variable holds the length of
++ the Ethernet frame that should be transmitted. */
++void uip_arp_out(void);
+
-+#define UIP_TCPIP_HLEN 40
++/* The uip_arp_timer() function should be called every ten seconds. It
++ is responsible for flushing old entries in the ARP table. */
++void uip_arp_timer(void);
+
-+/* The TCP and IP headers. */
-+typedef struct {
-+ /* IP header. */
-+ u8_t vhl,
-+ tos,
-+ len[2],
-+ ipid[2],
-+ ipoffset[2],
-+ ttl,
-+ proto;
-+ u16_t ipchksum;
-+ u16_t srcipaddr[2],
-+ destipaddr[2];
-+
-+ /* TCP header. */
-+ u16_t srcport,
-+ destport;
-+ u8_t seqno[4],
-+ ackno[4],
-+ tcpoffset,
-+ flags,
-+ wnd[2];
-+ u16_t tcpchksum;
-+ u8_t urgp[2];
-+ u8_t optdata[4];
-+} uip_tcpip_hdr;
++/** @} */
+
-+/* The ICMP and IP headers. */
-+typedef struct {
-+ /* IP header. */
-+ u8_t vhl,
-+ tos,
-+ len[2],
-+ ipid[2],
-+ ipoffset[2],
-+ ttl,
-+ proto;
-+ u16_t ipchksum;
-+ u16_t srcipaddr[2],
-+ destipaddr[2];
-+ /* ICMP (echo) header. */
-+ u8_t type, icode;
-+ u16_t icmpchksum;
-+ u16_t id, seqno;
-+} uip_icmpip_hdr;
++/**
++ * \addtogroup uipconffunc
++ * @{
++ */
+
++/**
++ * Set the default router's IP address.
++ *
++ * \param addr A pointer to a 4-byte array containing the IP address
++ * of the default router.
++ *
++ * \hideinitializer
++ */
++#define uip_setdraddr(addr) do { uip_arp_draddr[0] = addr[0]; \
++ uip_arp_draddr[1] = addr[1]; } while(0)
+
-+/* The UDP and IP headers. */
-+typedef struct {
-+ /* IP header. */
-+ u8_t vhl,
-+ tos,
-+ len[2],
-+ ipid[2],
-+ ipoffset[2],
-+ ttl,
-+ proto;
-+ u16_t ipchksum;
-+ u16_t srcipaddr[2],
-+ destipaddr[2];
-+
-+ /* UDP header. */
-+ u16_t srcport,
-+ destport;
-+ u16_t udplen;
-+ u16_t udpchksum;
-+} uip_udpip_hdr;
++/**
++ * Set the netmask.
++ *
++ * \param addr A pointer to a 4-byte array containing the IP address
++ * of the netmask.
++ *
++ * \hideinitializer
++ */
++#define uip_setnetmask(addr) do { uip_arp_netmask[0] = addr[0]; \
++ uip_arp_netmask[1] = addr[1]; } while(0)
+
-+#define UIP_PROTO_ICMP 1
-+#define UIP_PROTO_TCP 6
-+#define UIP_PROTO_UDP 17
+
-+#if UIP_FIXEDADDR
-+extern const u16_t uip_hostaddr[2];
-+#else /* UIP_FIXEDADDR */
-+extern u16_t uip_hostaddr[2];
-+#endif /* UIP_FIXEDADDR */
++/**
++ * Get the default router's IP address.
++ *
++ * \param addr A pointer to a 4-byte array that will be filled in with
++ * the IP address of the default router.
++ *
++ * \hideinitializer
++ */
++#define uip_getdraddr(addr) do { addr[0] = uip_arp_draddr[0]; \
++ addr[1] = uip_arp_draddr[1]; } while(0)
++
++/**
++ * Get the netmask.
++ *
++ * \param addr A pointer to a 4-byte array that will be filled in with
++ * the value of the netmask.
++ *
++ * \hideinitializer
++ */
++#define uip_getnetmask(addr) do { addr[0] = uip_arp_netmask[0]; \
++ addr[1] = uip_arp_netmask[1]; } while(0)
+
-+#endif /* __UIP_H__ */
+
++/**
++ * Specifiy the Ethernet MAC address.
++ *
++ * The ARP code needs to know the MAC address of the Ethernet card in
++ * order to be able to respond to ARP queries and to generate working
++ * Ethernet headers.
++ *
++ * \note This macro only specifies the Ethernet MAC address to the ARP
++ * code. It cannot be used to change the MAC address of the Ethernet
++ * card.
++ *
++ * \param eaddr A pointer to a struct uip_eth_addr containing the
++ * Ethernet MAC address of the Ethernet card.
++ *
++ * \hideinitializer
++ */
++#define uip_setethaddr(eaddr) do {uip_ethaddr.addr[0] = eaddr.addr[0]; \
++ uip_ethaddr.addr[1] = eaddr.addr[1];\
++ uip_ethaddr.addr[2] = eaddr.addr[2];\
++ uip_ethaddr.addr[3] = eaddr.addr[3];\
++ uip_ethaddr.addr[4] = eaddr.addr[4];\
++ uip_ethaddr.addr[5] = eaddr.addr[5];} while(0)
+
+/** @} */
+
++/**
++ * \internal Internal variables that are set using the macros
++ * uip_setdraddr and uip_setnetmask.
++ */
++extern u16_t uip_arp_draddr[2], uip_arp_netmask[2];
++#endif /* __UIP_ARP_H__ */
++
++
--- /dev/null
+++ b/net/uip-0.9/uipopt.h
@@ -0,0 +1,557 @@
projects / openwrt.git / blobdiff