-diff -Naur ppp-2.4.4.orig/pppd/pppd.h ppp-2.4.4/pppd/pppd.h
---- ppp-2.4.4.orig/pppd/pppd.h 2009-05-07 15:49:34.000000000 -0400
-+++ ppp-2.4.4/pppd/pppd.h 2009-05-07 16:16:20.000000000 -0400
-@@ -565,7 +565,7 @@
- void demand_block __P((void)); /* set all NPs to queue up packets */
- void demand_unblock __P((void)); /* set all NPs to pass packets */
- void demand_discard __P((void)); /* set all NPs to discard packets */
--void demand_rexmit __P((int)); /* retransmit saved frames for an NP */
-+void demand_rexmit __P((int, u_int32_t)); /* retransmit saved frames for an NP*/
- int loop_chars __P((unsigned char *, int)); /* process chars from loopback */
- int loop_frame __P((unsigned char *, int)); /* should we bring link up? */
-
-diff -Naur ppp-2.4.4.orig/pppd/demand.c ppp-2.4.4/pppd/demand.c
---- ppp-2.4.4.orig/pppd/demand.c 2005-08-25 08:14:18.000000000 -0400
-+++ ppp-2.4.4/pppd/demand.c 2009-05-07 16:16:20.000000000 -0400
-@@ -36,6 +36,8 @@
- #include <errno.h>
- #include <fcntl.h>
- #include <netdb.h>
-+#include <unistd.h>
-+#include <syslog.h>
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/wait.h>
-@@ -43,6 +45,8 @@
- #include <sys/resource.h>
- #include <sys/stat.h>
- #include <sys/socket.h>
-+#include <netinet/in.h>
-+#include <arpa/inet.h>
- #ifdef PPP_FILTER
- #include <pcap-bpf.h>
- #endif
-@@ -221,6 +225,14 @@
- int c, rv;
-
- rv = 0;
-+
-+/* check for synchronous connection... */
-+
-+ if ( (p[0] == 0xFF) && (p[1] == 0x03) ) {
-+ rv = loop_frame(p,n);
-+ return rv;
-+ }
-+
- for (; n > 0; --n) {
- c = *p++;
- if (c == PPP_FLAG) {
-@@ -299,17 +311,102 @@
- * loopback, now that the real serial link is up.
- */
- void
--demand_rexmit(proto)
-+demand_rexmit(proto, newip)
- int proto;
-+ u_int32_t newip;
- {
- struct packet *pkt, *prev, *nextpkt;
-+ unsigned short checksum;
-+ unsigned short pkt_checksum = 0;
-+ unsigned iphdr;
-+ struct timeval tv;
-+ char cv = 0;
-+ char ipstr[16];
-
- prev = NULL;
- pkt = pend_q;
- pend_q = NULL;
-+ tv.tv_sec = 1;
-+ tv.tv_usec = 0;
-+ select(0,NULL,NULL,NULL,&tv); /* Sleep for 1 Seconds */
- for (; pkt != NULL; pkt = nextpkt) {
- nextpkt = pkt->next;
- if (PPP_PROTOCOL(pkt->data) == proto) {
-+ if ( (proto == PPP_IP) && newip ) {
-+ /* Get old checksum */
-+
-+ iphdr = (pkt->data[4] & 15) << 2;
-+ checksum = *((unsigned short *) (pkt->data+14));
-+ if (checksum == 0xFFFF) {
-+ checksum = 0;
-+ }
-+
-+
-+ if (pkt->data[13] == 17) {
-+ pkt_checksum = *((unsigned short *) (pkt->data+10+iphdr));
-+ if (pkt_checksum) {
-+ cv = 1;
-+ if (pkt_checksum == 0xFFFF) {
-+ pkt_checksum = 0;
-+ }
-+ }
-+ else {
-+ cv = 0;
-+ }
-+ }
-+
-+ if (pkt->data[13] == 6) {
-+ pkt_checksum = *((unsigned short *) (pkt->data+20+iphdr));
-+ cv = 1;
-+ if (pkt_checksum == 0xFFFF) {
-+ pkt_checksum = 0;
-+ }
-+ }
-+
-+ /* Delete old Source-IP-Address */
-+ checksum -= *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
-+ checksum -= *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
-+
-+ pkt_checksum -= *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
-+ pkt_checksum -= *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
-+
-+ /* Change Source-IP-Address */
-+ * ((u_int32_t *) (pkt->data + 16)) = newip;
-+
-+ /* Add new Source-IP-Address */
-+ checksum += *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
-+ checksum += *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
-+
-+ pkt_checksum += *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
-+ pkt_checksum += *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
-+
-+ /* Write new checksum */
-+ if (!checksum) {
-+ checksum = 0xFFFF;
-+ }
-+ *((unsigned short *) (pkt->data+14)) = checksum;
-+ if (pkt->data[13] == 6) {
-+ *((unsigned short *) (pkt->data+20+iphdr)) = pkt_checksum;
-+ }
-+ if (cv && (pkt->data[13] == 17) ) {
-+ *((unsigned short *) (pkt->data+10+iphdr)) = pkt_checksum;
-+ }
-+
-+ /* Log Packet */
-+ strcpy(ipstr,inet_ntoa(*( (struct in_addr *) (pkt->data+16))));
-+ if (pkt->data[13] == 1) {
-+ syslog(LOG_INFO,"Open ICMP %s -> %s\n",
-+ ipstr,
-+ inet_ntoa(*( (struct in_addr *) (pkt->data+20))));
-+ } else {
-+ syslog(LOG_INFO,"Open %s %s:%d -> %s:%d\n",
-+ pkt->data[13] == 6 ? "TCP" : "UDP",
-+ ipstr,
-+ ntohs(*( (short *) (pkt->data+iphdr+4))),
-+ inet_ntoa(*( (struct in_addr *) (pkt->data+20))),
-+ ntohs(*( (short *) (pkt->data+iphdr+6))));
-+ }
-+ }
- output(0, pkt->data, pkt->length);
- free(pkt);
- } else {
-diff -Naur ppp-2.4.4.orig/pppd/ipcp.c ppp-2.4.4/pppd/ipcp.c
---- ppp-2.4.4.orig/pppd/ipcp.c 2009-05-07 15:49:34.000000000 -0400
-+++ ppp-2.4.4/pppd/ipcp.c 2009-05-07 16:16:20.000000000 -0400
-@@ -1776,7 +1776,7 @@
- proxy_arp_set[f->unit] = 1;
-
- }
-- demand_rexmit(PPP_IP);
-+ demand_rexmit(PPP_IP,go->ouraddr);
- sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
-
- } else {
-diff -Naur ppp-2.4.4.orig/pppd/ipv6cp.c ppp-2.4.4/pppd/ipv6cp.c
---- ppp-2.4.4.orig/pppd/ipv6cp.c 2005-08-25 19:59:34.000000000 -0400
-+++ ppp-2.4.4/pppd/ipv6cp.c 2009-05-07 16:16:20.000000000 -0400
-@@ -1232,7 +1232,7 @@
- }
-
- }
-- demand_rexmit(PPP_IPV6);
-+ demand_rexmit(PPP_IPV6,0);
- sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
-
- } else {
-diff -Naur ppp-2.4.4.orig/pppd/pppd.h ppp-2.4.4/pppd/pppd.h
---- ppp-2.4.4.orig/pppd/pppd.h 2009-05-07 15:49:34.000000000 -0400
-+++ ppp-2.4.4/pppd/pppd.h 2009-05-07 16:16:20.000000000 -0400
-@@ -565,7 +565,7 @@
projects / openwrt.git / blobdiff