--- /dev/null
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack.h 2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack.h 2005-04-02 19:41:05.000000000 +0200
+@@ -50,16 +50,19 @@
+
+ #include <linux/netfilter_ipv4/ip_conntrack_tcp.h>
+ #include <linux/netfilter_ipv4/ip_conntrack_icmp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
+
+ /* per conntrack: protocol private data */
+ union ip_conntrack_proto {
+ /* insert conntrack proto private data here */
+ struct ip_ct_tcp tcp;
+ struct ip_ct_icmp icmp;
++ struct ip_ct_gre gre;
+ };
+
+ union ip_conntrack_expect_proto {
+ /* insert expect proto private data here */
++ struct ip_ct_gre_expect gre;
+ };
+
+ /* Add protocol helper include file here */
+@@ -67,6 +70,7 @@
+
+ #include <linux/netfilter_ipv4/ip_conntrack_ftp.h>
+ #include <linux/netfilter_ipv4/ip_conntrack_irc.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
+
+ /* per expectation: application helper private data */
+ union ip_conntrack_expect_help {
+@@ -74,6 +78,7 @@
+ struct ip_ct_amanda_expect exp_amanda_info;
+ struct ip_ct_ftp_expect exp_ftp_info;
+ struct ip_ct_irc_expect exp_irc_info;
++ struct ip_ct_pptp_expect exp_pptp_info;
+
+ #ifdef CONFIG_IP_NF_NAT_NEEDED
+ union {
+@@ -87,14 +92,17 @@
+ /* insert conntrack helper private data (master) here */
+ struct ip_ct_ftp_master ct_ftp_info;
+ struct ip_ct_irc_master ct_irc_info;
++ struct ip_ct_pptp_master ct_pptp_info;
+ };
+
+ #ifdef CONFIG_IP_NF_NAT_NEEDED
+ #include <linux/netfilter_ipv4/ip_nat.h>
++#include <linux/netfilter_ipv4/ip_nat_pptp.h>
+
+ /* per conntrack: nat application helper private data */
+ union ip_conntrack_nat_help {
+ /* insert nat helper private data here */
++ struct ip_nat_pptp nat_pptp_info;
+ };
+ #endif
+
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_pptp.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_pptp.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_pptp.h 2005-04-02 19:09:07.000000000 +0200
+@@ -0,0 +1,313 @@
++/* PPTP constants and structs */
++#ifndef _CONNTRACK_PPTP_H
++#define _CONNTRACK_PPTP_H
++
++/* state of the control session */
++enum pptp_ctrlsess_state {
++ PPTP_SESSION_NONE, /* no session present */
++ PPTP_SESSION_ERROR, /* some session error */
++ PPTP_SESSION_STOPREQ, /* stop_sess request seen */
++ PPTP_SESSION_REQUESTED, /* start_sess request seen */
++ PPTP_SESSION_CONFIRMED, /* session established */
++};
++
++/* state of the call inside the control session */
++enum pptp_ctrlcall_state {
++ PPTP_CALL_NONE,
++ PPTP_CALL_ERROR,
++ PPTP_CALL_OUT_REQ,
++ PPTP_CALL_OUT_CONF,
++ PPTP_CALL_IN_REQ,
++ PPTP_CALL_IN_REP,
++ PPTP_CALL_IN_CONF,
++ PPTP_CALL_CLEAR_REQ,
++};
++
++
++/* conntrack private data */
++struct ip_ct_pptp_master {
++ enum pptp_ctrlsess_state sstate; /* session state */
++
++ /* everything below is going to be per-expectation in newnat,
++ * since there could be more than one call within one session */
++ enum pptp_ctrlcall_state cstate; /* call state */
++ u_int16_t pac_call_id; /* call id of PAC, host byte order */
++ u_int16_t pns_call_id; /* call id of PNS, host byte order */
++};
++
++/* conntrack_expect private member */
++struct ip_ct_pptp_expect {
++ enum pptp_ctrlcall_state cstate; /* call state */
++ u_int16_t pac_call_id; /* call id of PAC */
++ u_int16_t pns_call_id; /* call id of PNS */
++};
++
++
++#ifdef __KERNEL__
++
++#include <linux/netfilter_ipv4/lockhelp.h>
++DECLARE_LOCK_EXTERN(ip_pptp_lock);
++
++#define IP_CONNTR_PPTP PPTP_CONTROL_PORT
++
++union pptp_ctrl_union {
++ void *rawreq;
++ struct PptpStartSessionRequest *sreq;
++ struct PptpStartSessionReply *srep;
++ struct PptpStopSessionRequest *streq;
++ struct PptpStopSessionReply *strep;
++ struct PptpOutCallRequest *ocreq;
++ struct PptpOutCallReply *ocack;
++ struct PptpInCallRequest *icreq;
++ struct PptpInCallReply *icack;
++ struct PptpInCallConnected *iccon;
++ struct PptpClearCallRequest *clrreq;
++ struct PptpCallDisconnectNotify *disc;
++ struct PptpWanErrorNotify *wanerr;
++ struct PptpSetLinkInfo *setlink;
++};
++
++
++
++#define PPTP_CONTROL_PORT 1723
++
++#define PPTP_PACKET_CONTROL 1
++#define PPTP_PACKET_MGMT 2
++
++#define PPTP_MAGIC_COOKIE 0x1a2b3c4d
++
++struct pptp_pkt_hdr {
++ __u16 packetLength;
++ __u16 packetType;
++ __u32 magicCookie;
++};
++
++/* PptpControlMessageType values */
++#define PPTP_START_SESSION_REQUEST 1
++#define PPTP_START_SESSION_REPLY 2
++#define PPTP_STOP_SESSION_REQUEST 3
++#define PPTP_STOP_SESSION_REPLY 4
++#define PPTP_ECHO_REQUEST 5
++#define PPTP_ECHO_REPLY 6
++#define PPTP_OUT_CALL_REQUEST 7
++#define PPTP_OUT_CALL_REPLY 8
++#define PPTP_IN_CALL_REQUEST 9
++#define PPTP_IN_CALL_REPLY 10
++#define PPTP_IN_CALL_CONNECT 11
++#define PPTP_CALL_CLEAR_REQUEST 12
++#define PPTP_CALL_DISCONNECT_NOTIFY 13
++#define PPTP_WAN_ERROR_NOTIFY 14
++#define PPTP_SET_LINK_INFO 15
++
++#define PPTP_MSG_MAX 15
++
++/* PptpGeneralError values */
++#define PPTP_ERROR_CODE_NONE 0
++#define PPTP_NOT_CONNECTED 1
++#define PPTP_BAD_FORMAT 2
++#define PPTP_BAD_VALUE 3
++#define PPTP_NO_RESOURCE 4
++#define PPTP_BAD_CALLID 5
++#define PPTP_REMOVE_DEVICE_ERROR 6
++
++struct PptpControlHeader {
++ __u16 messageType;
++ __u16 reserved;
++};
++
++/* FramingCapability Bitmap Values */
++#define PPTP_FRAME_CAP_ASYNC 0x1
++#define PPTP_FRAME_CAP_SYNC 0x2
++
++/* BearerCapability Bitmap Values */
++#define PPTP_BEARER_CAP_ANALOG 0x1
++#define PPTP_BEARER_CAP_DIGITAL 0x2
++
++struct PptpStartSessionRequest {
++ __u16 protocolVersion;
++ __u8 reserved1;
++ __u8 reserved2;
++ __u32 framingCapability;
++ __u32 bearerCapability;
++ __u16 maxChannels;
++ __u16 firmwareRevision;
++ __u8 hostName[64];
++ __u8 vendorString[64];
++};
++
++/* PptpStartSessionResultCode Values */
++#define PPTP_START_OK 1
++#define PPTP_START_GENERAL_ERROR 2
++#define PPTP_START_ALREADY_CONNECTED 3
++#define PPTP_START_NOT_AUTHORIZED 4
++#define PPTP_START_UNKNOWN_PROTOCOL 5
++
++struct PptpStartSessionReply {
++ __u16 protocolVersion;
++ __u8 resultCode;
++ __u8 generalErrorCode;
++ __u32 framingCapability;
++ __u32 bearerCapability;
++ __u16 maxChannels;
++ __u16 firmwareRevision;
++ __u8 hostName[64];
++ __u8 vendorString[64];
++};
++
++/* PptpStopReasons */
++#define PPTP_STOP_NONE 1
++#define PPTP_STOP_PROTOCOL 2
++#define PPTP_STOP_LOCAL_SHUTDOWN 3
++
++struct PptpStopSessionRequest {
++ __u8 reason;
++};
++
++/* PptpStopSessionResultCode */
++#define PPTP_STOP_OK 1
++#define PPTP_STOP_GENERAL_ERROR 2
++
++struct PptpStopSessionReply {
++ __u8 resultCode;
++ __u8 generalErrorCode;
++};
++
++struct PptpEchoRequest {
++ __u32 identNumber;
++};
++
++/* PptpEchoReplyResultCode */
++#define PPTP_ECHO_OK 1
++#define PPTP_ECHO_GENERAL_ERROR 2
++
++struct PptpEchoReply {
++ __u32 identNumber;
++ __u8 resultCode;
++ __u8 generalErrorCode;
++ __u16 reserved;
++};
++
++/* PptpFramingType */
++#define PPTP_ASYNC_FRAMING 1
++#define PPTP_SYNC_FRAMING 2
++#define PPTP_DONT_CARE_FRAMING 3
++
++/* PptpCallBearerType */
++#define PPTP_ANALOG_TYPE 1
++#define PPTP_DIGITAL_TYPE 2
++#define PPTP_DONT_CARE_BEARER_TYPE 3
++
++struct PptpOutCallRequest {
++ __u16 callID;
++ __u16 callSerialNumber;
++ __u32 minBPS;
++ __u32 maxBPS;
++ __u32 bearerType;
++ __u32 framingType;
++ __u16 packetWindow;
++ __u16 packetProcDelay;
++ __u16 reserved1;
++ __u16 phoneNumberLength;
++ __u16 reserved2;
++ __u8 phoneNumber[64];
++ __u8 subAddress[64];
++};
++
++/* PptpCallResultCode */
++#define PPTP_OUTCALL_CONNECT 1
++#define PPTP_OUTCALL_GENERAL_ERROR 2
++#define PPTP_OUTCALL_NO_CARRIER 3
++#define PPTP_OUTCALL_BUSY 4
++#define PPTP_OUTCALL_NO_DIAL_TONE 5
++#define PPTP_OUTCALL_TIMEOUT 6
++#define PPTP_OUTCALL_DONT_ACCEPT 7
++
++struct PptpOutCallReply {
++ __u16 callID;
++ __u16 peersCallID;
++ __u8 resultCode;
++ __u8 generalErrorCode;
++ __u16 causeCode;
++ __u32 connectSpeed;
++ __u16 packetWindow;
++ __u16 packetProcDelay;
++ __u32 physChannelID;
++};
++
++struct PptpInCallRequest {
++ __u16 callID;
++ __u16 callSerialNumber;
++ __u32 callBearerType;
++ __u32 physChannelID;
++ __u16 dialedNumberLength;
++ __u16 dialingNumberLength;
++ __u8 dialedNumber[64];
++ __u8 dialingNumber[64];
++ __u8 subAddress[64];
++};
++
++/* PptpInCallResultCode */
++#define PPTP_INCALL_ACCEPT 1
++#define PPTP_INCALL_GENERAL_ERROR 2
++#define PPTP_INCALL_DONT_ACCEPT 3
++
++struct PptpInCallReply {
++ __u16 callID;
++ __u16 peersCallID;
++ __u8 resultCode;
++ __u8 generalErrorCode;
++ __u16 packetWindow;
++ __u16 packetProcDelay;
++ __u16 reserved;
++};
++
++struct PptpInCallConnected {
++ __u16 peersCallID;
++ __u16 reserved;
++ __u32 connectSpeed;
++ __u16 packetWindow;
++ __u16 packetProcDelay;
++ __u32 callFramingType;
++};
++
++struct PptpClearCallRequest {
++ __u16 callID;
++ __u16 reserved;
++};
++
++struct PptpCallDisconnectNotify {
++ __u16 callID;
++ __u8 resultCode;
++ __u8 generalErrorCode;
++ __u16 causeCode;
++ __u16 reserved;
++ __u8 callStatistics[128];
++};
++
++struct PptpWanErrorNotify {
++ __u16 peersCallID;
++ __u16 reserved;
++ __u32 crcErrors;
++ __u32 framingErrors;
++ __u32 hardwareOverRuns;
++ __u32 bufferOverRuns;
++ __u32 timeoutErrors;
++ __u32 alignmentErrors;
++};
++
++struct PptpSetLinkInfo {
++ __u16 peersCallID;
++ __u16 reserved;
++ __u32 sendAccm;
++ __u32 recvAccm;
++};
++
++
++struct pptp_priv_data {
++ __u16 call_id;
++ __u16 mcall_id;
++ __u16 pcall_id;
++};
++
++#endif /* __KERNEL__ */
++#endif /* _CONNTRACK_PPTP_H */
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h 2005-04-02 19:10:45.000000000 +0200
+@@ -0,0 +1,123 @@
++#ifndef _CONNTRACK_PROTO_GRE_H
++#define _CONNTRACK_PROTO_GRE_H
++#include <asm/byteorder.h>
++
++/* GRE PROTOCOL HEADER */
++
++/* GRE Version field */
++#define GRE_VERSION_1701 0x0
++#define GRE_VERSION_PPTP 0x1
++
++/* GRE Protocol field */
++#define GRE_PROTOCOL_PPTP 0x880B
++
++/* GRE Flags */
++#define GRE_FLAG_C 0x80
++#define GRE_FLAG_R 0x40
++#define GRE_FLAG_K 0x20
++#define GRE_FLAG_S 0x10
++#define GRE_FLAG_A 0x80
++
++#define GRE_IS_C(f) ((f)&GRE_FLAG_C)
++#define GRE_IS_R(f) ((f)&GRE_FLAG_R)
++#define GRE_IS_K(f) ((f)&GRE_FLAG_K)
++#define GRE_IS_S(f) ((f)&GRE_FLAG_S)
++#define GRE_IS_A(f) ((f)&GRE_FLAG_A)
++
++/* GRE is a mess: Four different standards */
++struct gre_hdr {
++#if defined(__LITTLE_ENDIAN_BITFIELD)
++ __u16 rec:3,
++ srr:1,
++ seq:1,
++ key:1,
++ routing:1,
++ csum:1,
++ version:3,
++ reserved:4,
++ ack:1;
++#elif defined(__BIG_ENDIAN_BITFIELD)
++ __u16 csum:1,
++ routing:1,
++ key:1,
++ seq:1,
++ srr:1,
++ rec:3,
++ ack:1,
++ reserved:4,
++ version:3;
++#else
++#error "Adjust your <asm/byteorder.h> defines"
++#endif
++ __u16 protocol;
++};
++
++/* modified GRE header for PPTP */
++struct gre_hdr_pptp {
++ __u8 flags; /* bitfield */
++ __u8 version; /* should be GRE_VERSION_PPTP */
++ __u16 protocol; /* should be GRE_PROTOCOL_PPTP */
++ __u16 payload_len; /* size of ppp payload, not inc. gre header */
++ __u16 call_id; /* peer's call_id for this session */
++ __u32 seq; /* sequence number. Present if S==1 */
++ __u32 ack; /* seq number of highest packet recieved by */
++ /* sender in this session */
++};
++
++
++/* this is part of ip_conntrack */
++struct ip_ct_gre {
++ unsigned int stream_timeout;
++ unsigned int timeout;
++};
++
++/* this is part of ip_conntrack_expect */
++struct ip_ct_gre_expect {
++ struct ip_ct_gre_keymap *keymap_orig, *keymap_reply;
++};
++
++#ifdef __KERNEL__
++struct ip_conntrack_expect;
++
++/* structure for original <-> reply keymap */
++struct ip_ct_gre_keymap {
++ struct list_head list;
++
++ struct ip_conntrack_tuple tuple;
++};
++
++
++/* add new tuple->key_reply pair to keymap */
++int ip_ct_gre_keymap_add(struct ip_conntrack_expect *exp,
++ struct ip_conntrack_tuple *t,
++ int reply);
++
++/* change an existing keymap entry */
++void ip_ct_gre_keymap_change(struct ip_ct_gre_keymap *km,
++ struct ip_conntrack_tuple *t);
++
++/* delete keymap entries */
++void ip_ct_gre_keymap_destroy(struct ip_conntrack_expect *exp);
++
++
++/* get pointer to gre key, if present */
++static inline u_int32_t *gre_key(struct gre_hdr *greh)
++{
++ if (!greh->key)
++ return NULL;
++ if (greh->csum || greh->routing)
++ return (u_int32_t *) (greh+sizeof(*greh)+4);
++ return (u_int32_t *) (greh+sizeof(*greh));
++}
++
++/* get pointer ot gre csum, if present */
++static inline u_int16_t *gre_csum(struct gre_hdr *greh)
++{
++ if (!greh->csum)
++ return NULL;
++ return (u_int16_t *) (greh+sizeof(*greh));
++}
++
++#endif /* __KERNEL__ */
++
++#endif /* _CONNTRACK_PROTO_GRE_H */
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_tuple.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_tuple.h 2003-11-28 19:26:21.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_tuple.h 2005-04-02 19:07:18.000000000 +0200
+@@ -14,7 +14,7 @@
+ union ip_conntrack_manip_proto
+ {
+ /* Add other protocols here. */
+- u_int16_t all;
++ u_int32_t all;
+
+ struct {
+ u_int16_t port;
+@@ -25,6 +25,9 @@
+ struct {
+ u_int16_t id;
+ } icmp;
++ struct {
++ u_int32_t key;
++ } gre;
+ };
+
+ /* The manipulable part of the tuple. */
+@@ -44,7 +47,7 @@
+ u_int32_t ip;
+ union {
+ /* Add other protocols here. */
+- u_int16_t all;
++ u_int32_t all;
+
+ struct {
+ u_int16_t port;
+@@ -55,6 +58,9 @@
+ struct {
+ u_int8_t type, code;
+ } icmp;
++ struct {
++ u_int32_t key;
++ } gre;
+ } u;
+
+ /* The protocol. */
+@@ -80,10 +86,16 @@
+ #ifdef __KERNEL__
+
+ #define DUMP_TUPLE(tp) \
+-DEBUGP("tuple %p: %u %u.%u.%u.%u:%hu -> %u.%u.%u.%u:%hu\n", \
++DEBUGP("tuple %p: %u %u.%u.%u.%u:%u -> %u.%u.%u.%u:%u\n", \
+ (tp), (tp)->dst.protonum, \
+- NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all), \
+- NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all))
++ NIPQUAD((tp)->src.ip), ntohl((tp)->src.u.all), \
++ NIPQUAD((tp)->dst.ip), ntohl((tp)->dst.u.all))
++
++#define DUMP_TUPLE_RAW(x) \
++ DEBUGP("tuple %p: %u %u.%u.%u.%u:0x%08x -> %u.%u.%u.%u:0x%08x\n",\
++ (x), (x)->dst.protonum, \
++ NIPQUAD((x)->src.ip), ntohl((x)->src.u.all), \
++ NIPQUAD((x)->dst.ip), ntohl((x)->dst.u.all))
+
+ #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
+
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_nat_pptp.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_nat_pptp.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_nat_pptp.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_nat_pptp.h 2005-04-02 19:07:18.000000000 +0200
+@@ -0,0 +1,11 @@
++/* PPTP constants and structs */
++#ifndef _NAT_PPTP_H
++#define _NAT_PPTP_H
++
++/* conntrack private data */
++struct ip_nat_pptp {
++ u_int16_t pns_call_id; /* NAT'ed PNS call id */
++ u_int16_t pac_call_id; /* NAT'ed PAC call id */
++};
++
++#endif /* _NAT_PPTP_H */
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/Config.in linux-2.4.29-dev/net/ipv4/netfilter/Config.in
+--- linux-2.4.29-old/net/ipv4/netfilter/Config.in 2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/net/ipv4/netfilter/Config.in 2005-04-02 19:07:18.000000000 +0200
+@@ -10,6 +10,8 @@
+ dep_tristate ' Amanda protocol support' CONFIG_IP_NF_AMANDA $CONFIG_IP_NF_CONNTRACK
+ dep_tristate ' TFTP protocol support' CONFIG_IP_NF_TFTP $CONFIG_IP_NF_CONNTRACK
+ dep_tristate ' IRC protocol support' CONFIG_IP_NF_IRC $CONFIG_IP_NF_CONNTRACK
++ dep_tristate ' GRE protocol support' CONFIG_IP_NF_CT_PROTO_GRE $CONFIG_IP_NF_CONNTRACK
++ dep_tristate ' PPTP protocol support' CONFIG_IP_NF_PPTP $CONFIG_IP_NF_CT_PROTO_GRE
+ fi
+
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+@@ -67,6 +69,20 @@
+ define_bool CONFIG_IP_NF_NAT_NEEDED y
+ dep_tristate ' MASQUERADE target support' CONFIG_IP_NF_TARGET_MASQUERADE $CONFIG_IP_NF_NAT
+ dep_tristate ' REDIRECT target support' CONFIG_IP_NF_TARGET_REDIRECT $CONFIG_IP_NF_NAT
++ if [ "$CONFIG_IP_NF_PPTP" = "m" ]; then
++ define_tristate CONFIG_IP_NF_NAT_PPTP m
++ else
++ if [ "$CONFIG_IP_NF_PPTP" = "y" ]; then
++ define_tristate CONFIG_IP_NF_NAT_PPTP $CONFIG_IP_NF_NAT
++ fi
++ fi
++ if [ "$CONFIG_IP_NF_CT_PROTO_GRE" = "m" ]; then
++ define_tristate CONFIG_IP_NF_NAT_PROTO_GRE m
++ else
++ if [ "$CONFIG_IP_NF_CT_PROTO_GRE" = "y" ]; then
++ define_tristate CONFIG_IP_NF_NAT_PROTO_GRE $CONFIG_IP_NF_NAT
++ fi
++ fi
+ if [ "$CONFIG_IP_NF_AMANDA" = "m" ]; then
+ define_tristate CONFIG_IP_NF_NAT_AMANDA m
+ else
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_core.c linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_core.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_core.c 2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_core.c 2005-04-02 19:07:18.000000000 +0200
+@@ -142,6 +142,8 @@
+ tuple->dst.ip = iph->daddr;
+ tuple->dst.protonum = iph->protocol;
+
++ tuple->src.u.all = tuple->dst.u.all = 0;
++
+ ret = protocol->pkt_to_tuple((u_int32_t *)iph + iph->ihl,
+ len - 4*iph->ihl,
+ tuple);
+@@ -157,6 +159,8 @@
+ inverse->dst.ip = orig->src.ip;
+ inverse->dst.protonum = orig->dst.protonum;
+
++ inverse->src.u.all = inverse->dst.u.all = 0;
++
+ return protocol->invert_tuple(inverse, orig);
+ }
+
+@@ -954,8 +958,8 @@
+ * so there is no need to use the tuple lock too */
+
+ DEBUGP("ip_conntrack_expect_related %p\n", related_to);
+- DEBUGP("tuple: "); DUMP_TUPLE(&expect->tuple);
+- DEBUGP("mask: "); DUMP_TUPLE(&expect->mask);
++ DEBUGP("tuple: "); DUMP_TUPLE_RAW(&expect->tuple);
++ DEBUGP("mask: "); DUMP_TUPLE_RAW(&expect->mask);
+
+ old = LIST_FIND(&ip_conntrack_expect_list, resent_expect,
+ struct ip_conntrack_expect *, &expect->tuple,
+@@ -1072,15 +1076,14 @@
+
+ MUST_BE_READ_LOCKED(&ip_conntrack_lock);
+ WRITE_LOCK(&ip_conntrack_expect_tuple_lock);
+-
+ DEBUGP("change_expect:\n");
+- DEBUGP("exp tuple: "); DUMP_TUPLE(&expect->tuple);
+- DEBUGP("exp mask: "); DUMP_TUPLE(&expect->mask);
+- DEBUGP("newtuple: "); DUMP_TUPLE(newtuple);
++ DEBUGP("exp tuple: "); DUMP_TUPLE_RAW(&expect->tuple);
++ DEBUGP("exp mask: "); DUMP_TUPLE_RAW(&expect->mask);
++ DEBUGP("newtuple: "); DUMP_TUPLE_RAW(newtuple);
+ if (expect->ct_tuple.dst.protonum == 0) {
+ /* Never seen before */
+ DEBUGP("change expect: never seen before\n");
+- if (!ip_ct_tuple_equal(&expect->tuple, newtuple)
++ if (!ip_ct_tuple_mask_cmp(&expect->tuple, newtuple, &expect->mask)
+ && LIST_FIND(&ip_conntrack_expect_list, expect_clash,
+ struct ip_conntrack_expect *, newtuple, &expect->mask)) {
+ /* Force NAT to find an unused tuple */
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp.c linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp.c 2005-04-02 19:13:21.000000000 +0200
+@@ -0,0 +1,633 @@
++/*
++ * ip_conntrack_pptp.c - Version 1.9
++ *
++ * Connection tracking support for PPTP (Point to Point Tunneling Protocol).
++ * PPTP is a a protocol for creating virtual private networks.
++ * It is a specification defined by Microsoft and some vendors
++ * working with Microsoft. PPTP is built on top of a modified
++ * version of the Internet Generic Routing Encapsulation Protocol.
++ * GRE is defined in RFC 1701 and RFC 1702. Documentation of
++ * PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ * Limitations:
++ * - We blindly assume that control connections are always
++ * established in PNS->PAC direction. This is a violation
++ * of RFFC2673
++ *
++ * TODO: - finish support for multiple calls within one session
++ * (needs expect reservations in newnat)
++ * - testing of incoming PPTP calls
++ *
++ * Changes:
++ * 2002-02-05 - Version 1.3
++ * - Call ip_conntrack_unexpect_related() from
++ * pptp_timeout_related() to destroy expectations in case
++ * CALL_DISCONNECT_NOTIFY or tcp fin packet was seen
++ * (Philip Craig <philipc@snapgear.com>)
++ * - Add Version information at module loadtime
++ * 2002-02-10 - Version 1.6
++ * - move to C99 style initializers
++ * - remove second expectation if first arrives
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/netfilter.h>
++#include <linux/ip.h>
++#include <net/checksum.h>
++#include <net/tcp.h>
++
++#include <linux/netfilter_ipv4/lockhelp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
++
++#define IP_CT_PPTP_VERSION "1.9"
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("Netfilter connection tracking helper module for PPTP");
++
++DECLARE_LOCK(ip_pptp_lock);
++
++#if 0
++#include "ip_conntrack_pptp_priv.h"
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++ ": " format, ## args)
++#else
++#define DEBUGP(format, args...)
++#endif
++
++#define SECS *HZ
++#define MINS * 60 SECS
++#define HOURS * 60 MINS
++#define DAYS * 24 HOURS
++
++#define PPTP_GRE_TIMEOUT (10 MINS)
++#define PPTP_GRE_STREAM_TIMEOUT (5 DAYS)
++
++static int pptp_expectfn(struct ip_conntrack *ct)
++{
++ struct ip_conntrack *master;
++ struct ip_conntrack_expect *exp;
++
++ DEBUGP("increasing timeouts\n");
++ /* increase timeout of GRE data channel conntrack entry */
++ ct->proto.gre.timeout = PPTP_GRE_TIMEOUT;
++ ct->proto.gre.stream_timeout = PPTP_GRE_STREAM_TIMEOUT;
++
++ master = master_ct(ct);
++ if (!master) {
++ DEBUGP(" no master!!!\n");
++ return 0;
++ }
++
++ exp = ct->master;
++ if (!exp) {
++ DEBUGP("no expectation!!\n");
++ return 0;
++ }
++
++ DEBUGP("completing tuples with ct info\n");
++ /* we can do this, since we're unconfirmed */
++ if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.gre.key ==
++ htonl(master->help.ct_pptp_info.pac_call_id)) {
++ /* assume PNS->PAC */
++ ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++ htonl(master->help.ct_pptp_info.pns_call_id);
++ ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++ htonl(master->help.ct_pptp_info.pns_call_id);
++ } else {
++ /* assume PAC->PNS */
++ ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++ htonl(master->help.ct_pptp_info.pac_call_id);
++ ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++ htonl(master->help.ct_pptp_info.pac_call_id);
++ }
++
++ /* delete other expectation */
++ if (exp->expected_list.next != &exp->expected_list) {
++ struct ip_conntrack_expect *other_exp;
++ struct list_head *cur_item, *next;
++
++ for (cur_item = master->sibling_list.next;
++ cur_item != &master->sibling_list; cur_item = next) {
++ next = cur_item->next;
++ other_exp = list_entry(cur_item,
++ struct ip_conntrack_expect,
++ expected_list);
++ /* remove only if occurred at same sequence number */
++ if (other_exp != exp && other_exp->seq == exp->seq) {
++ DEBUGP("unexpecting other direction\n");
++ ip_ct_gre_keymap_destroy(other_exp);
++ ip_conntrack_unexpect_related(other_exp);
++ }
++ }
++ }
++
++ return 0;
++}
++
++/* timeout GRE data connections */
++static int pptp_timeout_related(struct ip_conntrack *ct)
++{
++ struct list_head *cur_item, *next;
++ struct ip_conntrack_expect *exp;
++
++ /* FIXME: do we have to lock something ? */
++ for (cur_item = ct->sibling_list.next;
++ cur_item != &ct->sibling_list; cur_item = next) {
++ next = cur_item->next;
++ exp = list_entry(cur_item, struct ip_conntrack_expect,
++ expected_list);
++
++ ip_ct_gre_keymap_destroy(exp);
++ if (!exp->sibling) {
++ ip_conntrack_unexpect_related(exp);
++ continue;
++ }
++
++ DEBUGP("setting timeout of conntrack %p to 0\n",
++ exp->sibling);
++ exp->sibling->proto.gre.timeout = 0;
++ exp->sibling->proto.gre.stream_timeout = 0;
++ ip_ct_refresh(exp->sibling, 0);
++ }
++
++ return 0;
++}
++
++/* expect GRE connections (PNS->PAC and PAC->PNS direction) */
++static inline int
++exp_gre(struct ip_conntrack *master,
++ u_int32_t seq,
++ u_int16_t callid,
++ u_int16_t peer_callid)
++{
++ struct ip_conntrack_expect exp;
++ struct ip_conntrack_tuple inv_tuple;
++
++ memset(&exp, 0, sizeof(exp));
++ /* tuple in original direction, PNS->PAC */
++ exp.tuple.src.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
++ exp.tuple.src.u.gre.key = htonl(ntohs(peer_callid));
++ exp.tuple.dst.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
++ exp.tuple.dst.u.gre.key = htonl(ntohs(callid));
++ exp.tuple.dst.protonum = IPPROTO_GRE;
++
++ exp.mask.src.ip = 0xffffffff;
++ exp.mask.src.u.all = 0;
++ exp.mask.dst.u.all = 0;
++ exp.mask.dst.u.gre.key = 0xffffffff;
++ exp.mask.dst.ip = 0xffffffff;
++ exp.mask.dst.protonum = 0xffff;
++
++ exp.seq = seq;
++ exp.expectfn = pptp_expectfn;
++
++ exp.help.exp_pptp_info.pac_call_id = ntohs(callid);
++ exp.help.exp_pptp_info.pns_call_id = ntohs(peer_callid);
++
++ DEBUGP("calling expect_related ");
++ DUMP_TUPLE_RAW(&exp.tuple);
++
++ /* Add GRE keymap entries */
++ if (ip_ct_gre_keymap_add(&exp, &exp.tuple, 0) != 0)
++ return 1;
++
++ invert_tuplepr(&inv_tuple, &exp.tuple);
++ if (ip_ct_gre_keymap_add(&exp, &inv_tuple, 1) != 0) {
++ ip_ct_gre_keymap_destroy(&exp);
++ return 1;
++ }
++
++ if (ip_conntrack_expect_related(master, &exp) != 0) {
++ ip_ct_gre_keymap_destroy(&exp);
++ DEBUGP("cannot expect_related()\n");
++ return 1;
++ }
++
++ /* tuple in reply direction, PAC->PNS */
++ exp.tuple.src.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
++ exp.tuple.src.u.gre.key = htonl(ntohs(callid));
++ exp.tuple.dst.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++ exp.tuple.dst.u.gre.key = htonl(ntohs(peer_callid));
++
++ DEBUGP("calling expect_related ");
++ DUMP_TUPLE_RAW(&exp.tuple);
++
++ /* Add GRE keymap entries */
++ ip_ct_gre_keymap_add(&exp, &exp.tuple, 0);
++ invert_tuplepr(&inv_tuple, &exp.tuple);
++ ip_ct_gre_keymap_add(&exp, &inv_tuple, 1);
++ /* FIXME: cannot handle error correctly, since we need to free
++ * the above keymap :( */
++
++ if (ip_conntrack_expect_related(master, &exp) != 0) {
++ /* free the second pair of keypmaps */
++ ip_ct_gre_keymap_destroy(&exp);
++ DEBUGP("cannot expect_related():\n");
++ return 1;
++ }
++
++ return 0;
++}
++
++static inline int
++pptp_inbound_pkt(struct tcphdr *tcph,
++ struct pptp_pkt_hdr *pptph,
++ size_t datalen,
++ struct ip_conntrack *ct,
++ enum ip_conntrack_info ctinfo)
++{
++ struct PptpControlHeader *ctlh;
++ union pptp_ctrl_union pptpReq;
++
++ struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
++ u_int16_t msg, *cid, *pcid;
++ u_int32_t seq;
++
++ ctlh = (struct PptpControlHeader *)
++ ((char *) pptph + sizeof(struct pptp_pkt_hdr));
++ pptpReq.rawreq = (void *)
++ ((char *) ctlh + sizeof(struct PptpControlHeader));
++
++ msg = ntohs(ctlh->messageType);
++ DEBUGP("inbound control message %s\n", strMName[msg]);
++
++ switch (msg) {
++ case PPTP_START_SESSION_REPLY:
++ /* server confirms new control session */
++ if (info->sstate < PPTP_SESSION_REQUESTED) {
++ DEBUGP("%s without START_SESS_REQUEST\n",
++ strMName[msg]);
++ break;
++ }
++ if (pptpReq.srep->resultCode == PPTP_START_OK)
++ info->sstate = PPTP_SESSION_CONFIRMED;
++ else
++ info->sstate = PPTP_SESSION_ERROR;
++ break;
++
++ case PPTP_STOP_SESSION_REPLY:
++ /* server confirms end of control session */
++ if (info->sstate > PPTP_SESSION_STOPREQ) {
++ DEBUGP("%s without STOP_SESS_REQUEST\n",
++ strMName[msg]);
++ break;
++ }
++ if (pptpReq.strep->resultCode == PPTP_STOP_OK)
++ info->sstate = PPTP_SESSION_NONE;
++ else
++ info->sstate = PPTP_SESSION_ERROR;
++ break;
++
++ case PPTP_OUT_CALL_REPLY:
++ /* server accepted call, we now expect GRE frames */
++ if (info->sstate != PPTP_SESSION_CONFIRMED) {
++ DEBUGP("%s but no session\n", strMName[msg]);
++ break;
++ }
++ if (info->cstate != PPTP_CALL_OUT_REQ &&
++ info->cstate != PPTP_CALL_OUT_CONF) {
++ DEBUGP("%s without OUTCALL_REQ\n", strMName[msg]);
++ break;
++ }
++ if (pptpReq.ocack->resultCode != PPTP_OUTCALL_CONNECT) {
++ info->cstate = PPTP_CALL_NONE;
++ break;
++ }
++
++ cid = &pptpReq.ocack->callID;
++ pcid = &pptpReq.ocack->peersCallID;
++
++ info->pac_call_id = ntohs(*cid);
++
++ if (htons(info->pns_call_id) != *pcid) {
++ DEBUGP("%s for unknown callid %u\n",
++ strMName[msg], ntohs(*pcid));
++ break;
++ }
++
++ DEBUGP("%s, CID=%X, PCID=%X\n", strMName[msg],
++ ntohs(*cid), ntohs(*pcid));
++
++ info->cstate = PPTP_CALL_OUT_CONF;
++
++ seq = ntohl(tcph->seq) + ((void *)pcid - (void *)pptph);
++ if (exp_gre(ct, seq, *cid, *pcid) != 0)
++ printk("ip_conntrack_pptp: error during exp_gre\n");
++ break;
++
++ case PPTP_IN_CALL_REQUEST:
++ /* server tells us about incoming call request */
++ if (info->sstate != PPTP_SESSION_CONFIRMED) {
++ DEBUGP("%s but no session\n", strMName[msg]);
++ break;
++ }
++ pcid = &pptpReq.icack->peersCallID;
++ DEBUGP("%s, PCID=%X\n", strMName[msg], ntohs(*pcid));
++ info->cstate = PPTP_CALL_IN_REQ;
++ info->pac_call_id= ntohs(*pcid);
++ break;
++
++ case PPTP_IN_CALL_CONNECT:
++ /* server tells us about incoming call established */
++ if (info->sstate != PPTP_SESSION_CONFIRMED) {
++ DEBUGP("%s but no session\n", strMName[msg]);
++ break;
++ }
++ if (info->sstate != PPTP_CALL_IN_REP
++ && info->sstate != PPTP_CALL_IN_CONF) {
++ DEBUGP("%s but never sent IN_CALL_REPLY\n",
++ strMName[msg]);
++ break;
++ }
++
++ pcid = &pptpReq.iccon->peersCallID;
++ cid = &info->pac_call_id;
++
++ if (info->pns_call_id != ntohs(*pcid)) {
++ DEBUGP("%s for unknown CallID %u\n",
++ strMName[msg], ntohs(*cid));
++ break;
++ }
++
++ DEBUGP("%s, PCID=%X\n", strMName[msg], ntohs(*pcid));
++ info->cstate = PPTP_CALL_IN_CONF;
++
++ /* we expect a GRE connection from PAC to PNS */
++ seq = ntohl(tcph->seq) + ((void *)pcid - (void *)pptph);
++ if (exp_gre(ct, seq, *cid, *pcid) != 0)
++ printk("ip_conntrack_pptp: error during exp_gre\n");
++
++ break;
++
++ case PPTP_CALL_DISCONNECT_NOTIFY:
++ /* server confirms disconnect */
++ cid = &pptpReq.disc->callID;
++ DEBUGP("%s, CID=%X\n", strMName[msg], ntohs(*cid));
++ info->cstate = PPTP_CALL_NONE;
++
++ /* untrack this call id, unexpect GRE packets */
++ pptp_timeout_related(ct);
++ break;
++
++ case PPTP_WAN_ERROR_NOTIFY:
++ break;
++
++ case PPTP_ECHO_REQUEST:
++ case PPTP_ECHO_REPLY:
++ /* I don't have to explain these ;) */
++ break;
++ default:
++ DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)
++ ? strMName[msg]:strMName[0], msg);
++ break;
++ }
++
++ return NF_ACCEPT;
++
++}
++
++static inline int
++pptp_outbound_pkt(struct tcphdr *tcph,
++ struct pptp_pkt_hdr *pptph,
++ size_t datalen,
++ struct ip_conntrack *ct,
++ enum ip_conntrack_info ctinfo)
++{
++ struct PptpControlHeader *ctlh;
++ union pptp_ctrl_union pptpReq;
++ struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
++ u_int16_t msg, *cid, *pcid;
++
++ ctlh = (struct PptpControlHeader *) ((void *) pptph + sizeof(*pptph));
++ pptpReq.rawreq = (void *) ((void *) ctlh + sizeof(*ctlh));
++
++ msg = ntohs(ctlh->messageType);
++ DEBUGP("outbound control message %s\n", strMName[msg]);
++
++ switch (msg) {
++ case PPTP_START_SESSION_REQUEST:
++ /* client requests for new control session */
++ if (info->sstate != PPTP_SESSION_NONE) {
++ DEBUGP("%s but we already have one",
++ strMName[msg]);
++ }
++ info->sstate = PPTP_SESSION_REQUESTED;
++ break;
++ case PPTP_STOP_SESSION_REQUEST:
++ /* client requests end of control session */
++ info->sstate = PPTP_SESSION_STOPREQ;
++ break;
++
++ case PPTP_OUT_CALL_REQUEST:
++ /* client initiating connection to server */
++ if (info->sstate != PPTP_SESSION_CONFIRMED) {
++ DEBUGP("%s but no session\n",
++ strMName[msg]);
++ break;
++ }
++ info->cstate = PPTP_CALL_OUT_REQ;
++ /* track PNS call id */
++ cid = &pptpReq.ocreq->callID;
++ DEBUGP("%s, CID=%X\n", strMName[msg], ntohs(*cid));
++ info->pns_call_id = ntohs(*cid);
++ break;
++ case PPTP_IN_CALL_REPLY:
++ /* client answers incoming call */
++ if (info->cstate != PPTP_CALL_IN_REQ
++ && info->cstate != PPTP_CALL_IN_REP) {
++ DEBUGP("%s without incall_req\n",
++ strMName[msg]);
++ break;
++ }
++ if (pptpReq.icack->resultCode != PPTP_INCALL_ACCEPT) {
++ info->cstate = PPTP_CALL_NONE;
++ break;
++ }
++ pcid = &pptpReq.icack->peersCallID;
++ if (info->pac_call_id != ntohs(*pcid)) {
++ DEBUGP("%s for unknown call %u\n",
++ strMName[msg], ntohs(*pcid));
++ break;
++ }
++ DEBUGP("%s, CID=%X\n", strMName[msg], ntohs(*pcid));
++ /* part two of the three-way handshake */
++ info->cstate = PPTP_CALL_IN_REP;
++ info->pns_call_id = ntohs(pptpReq.icack->callID);
++ break;
++
++ case PPTP_CALL_CLEAR_REQUEST:
++ /* client requests hangup of call */
++ if (info->sstate != PPTP_SESSION_CONFIRMED) {
++ DEBUGP("CLEAR_CALL but no session\n");
++ break;
++ }
++ /* FUTURE: iterate over all calls and check if
++ * call ID is valid. We don't do this without newnat,
++ * because we only know about last call */
++ info->cstate = PPTP_CALL_CLEAR_REQ;
++ break;
++ case PPTP_SET_LINK_INFO:
++ break;
++ case PPTP_ECHO_REQUEST:
++ case PPTP_ECHO_REPLY:
++ /* I don't have to explain these ;) */
++ break;
++ default:
++ DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)?
++ strMName[msg]:strMName[0], msg);
++ /* unknown: no need to create GRE masq table entry */
++ break;
++ }
++
++ return NF_ACCEPT;
++}
++
++
++/* track caller id inside control connection, call expect_related */
++static int
++conntrack_pptp_help(const struct iphdr *iph, size_t len,
++ struct ip_conntrack *ct, enum ip_conntrack_info ctinfo)
++
++{
++ struct pptp_pkt_hdr *pptph;
++
++ struct tcphdr *tcph = (void *) iph + iph->ihl * 4;
++ u_int32_t tcplen = len - iph->ihl * 4;
++ u_int32_t datalen = tcplen - tcph->doff * 4;
++ void *datalimit;
++ int dir = CTINFO2DIR(ctinfo);
++ struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
++
++ int oldsstate, oldcstate;
++ int ret;
++
++ /* don't do any tracking before tcp handshake complete */
++ if (ctinfo != IP_CT_ESTABLISHED
++ && ctinfo != IP_CT_ESTABLISHED+IP_CT_IS_REPLY) {
++ DEBUGP("ctinfo = %u, skipping\n", ctinfo);
++ return NF_ACCEPT;
++ }
++
++ /* not a complete TCP header? */
++ if (tcplen < sizeof(struct tcphdr) || tcplen < tcph->doff * 4) {
++ DEBUGP("tcplen = %u\n", tcplen);
++ return NF_ACCEPT;
++ }
++
++ /* checksum invalid? */
++ if (tcp_v4_check(tcph, tcplen, iph->saddr, iph->daddr,
++ csum_partial((char *) tcph, tcplen, 0))) {
++ printk(KERN_NOTICE __FILE__ ": bad csum\n");
++ /* W2K PPTP server sends TCP packets with wrong checksum :(( */
++ //return NF_ACCEPT;
++ }
++
++ if (tcph->fin || tcph->rst) {
++ DEBUGP("RST/FIN received, timeouting GRE\n");
++ /* can't do this after real newnat */
++ info->cstate = PPTP_CALL_NONE;
++
++ /* untrack this call id, unexpect GRE packets */
++ pptp_timeout_related(ct);
++ }
++
++
++ pptph = (struct pptp_pkt_hdr *) ((void *) tcph + tcph->doff * 4);
++ datalimit = (void *) pptph + datalen;
++
++ /* not a full pptp packet header? */
++ if ((void *) pptph+sizeof(*pptph) >= datalimit) {
++ DEBUGP("no full PPTP header, can't track\n");
++ return NF_ACCEPT;
++ }
++
++ /* if it's not a control message we can't do anything with it */
++ if (ntohs(pptph->packetType) != PPTP_PACKET_CONTROL ||
++ ntohl(pptph->magicCookie) != PPTP_MAGIC_COOKIE) {
++ DEBUGP("not a control packet\n");
++ return NF_ACCEPT;
++ }
++
++ oldsstate = info->sstate;
++ oldcstate = info->cstate;
++
++ LOCK_BH(&ip_pptp_lock);
++
++ /* FIXME: We just blindly assume that the control connection is always
++ * established from PNS->PAC. However, RFC makes no guarantee */
++ if (dir == IP_CT_DIR_ORIGINAL)
++ /* client -> server (PNS -> PAC) */
++ ret = pptp_outbound_pkt(tcph, pptph, datalen, ct, ctinfo);
++ else
++ /* server -> client (PAC -> PNS) */
++ ret = pptp_inbound_pkt(tcph, pptph, datalen, ct, ctinfo);
++ DEBUGP("sstate: %d->%d, cstate: %d->%d\n",
++ oldsstate, info->sstate, oldcstate, info->cstate);
++ UNLOCK_BH(&ip_pptp_lock);
++
++ return ret;
++}
++
++/* control protocol helper */
++static struct ip_conntrack_helper pptp = {
++ .list = { NULL, NULL },
++ .name = "pptp",
++ .flags = IP_CT_HELPER_F_REUSE_EXPECT,
++ .me = THIS_MODULE,
++ .max_expected = 2,
++ .timeout = 0,
++ .tuple = { .src = { .ip = 0,
++ .u = { .tcp = { .port =
++ __constant_htons(PPTP_CONTROL_PORT) } }
++ },
++ .dst = { .ip = 0,
++ .u = { .all = 0 },
++ .protonum = IPPROTO_TCP
++ }
++ },
++ .mask = { .src = { .ip = 0,
++ .u = { .tcp = { .port = 0xffff } }
++ },
++ .dst = { .ip = 0,
++ .u = { .all = 0 },
++ .protonum = 0xffff
++ }
++ },
++ .help = conntrack_pptp_help
++};
++
++/* ip_conntrack_pptp initialization */
++static int __init init(void)
++{
++ int retcode;
++
++ DEBUGP(__FILE__ ": registering helper\n");
++ if ((retcode = ip_conntrack_helper_register(&pptp))) {
++ printk(KERN_ERR "Unable to register conntrack application "
++ "helper for pptp: %d\n", retcode);
++ return -EIO;
++ }
++
++ printk("ip_conntrack_pptp version %s loaded\n", IP_CT_PPTP_VERSION);
++ return 0;
++}
++
++static void __exit fini(void)
++{
++ ip_conntrack_helper_unregister(&pptp);
++ printk("ip_conntrack_pptp version %s unloaded\n", IP_CT_PPTP_VERSION);
++}
++
++module_init(init);
++module_exit(fini);
++
++EXPORT_SYMBOL(ip_pptp_lock);
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp_priv.h linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp_priv.h
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp_priv.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp_priv.h 2005-04-02 19:14:10.000000000 +0200
+@@ -0,0 +1,24 @@
++#ifndef _IP_CT_PPTP_PRIV_H
++#define _IP_CT_PPTP_PRIV_H
++
++/* PptpControlMessageType names */
++static const char *strMName[] = {
++ "UNKNOWN_MESSAGE",
++ "START_SESSION_REQUEST",
++ "START_SESSION_REPLY",
++ "STOP_SESSION_REQUEST",
++ "STOP_SESSION_REPLY",
++ "ECHO_REQUEST",
++ "ECHO_REPLY",
++ "OUT_CALL_REQUEST",
++ "OUT_CALL_REPLY",
++ "IN_CALL_REQUEST",
++ "IN_CALL_REPLY",
++ "IN_CALL_CONNECT",
++ "CALL_CLEAR_REQUEST",
++ "CALL_DISCONNECT_NOTIFY",
++ "WAN_ERROR_NOTIFY",
++ "SET_LINK_INFO"
++};
++
++#endif
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_proto_gre.c linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_proto_gre.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_proto_gre.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_proto_gre.c 2005-04-02 19:14:31.000000000 +0200
+@@ -0,0 +1,333 @@
++/*
++ * ip_conntrack_proto_gre.c - Version 1.2
++ *
++ * Connection tracking protocol helper module for GRE.
++ *
++ * GRE is a generic encapsulation protocol, which is generally not very
++ * suited for NAT, as it has no protocol-specific part as port numbers.
++ *
++ * It has an optional key field, which may help us distinguishing two
++ * connections between the same two hosts.
++ *
++ * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784
++ *
++ * PPTP is built on top of a modified version of GRE, and has a mandatory
++ * field called "CallID", which serves us for the same purpose as the key
++ * field in plain GRE.
++ *
++ * Documentation about PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/timer.h>
++#include <linux/netfilter.h>
++#include <linux/ip.h>
++#include <linux/in.h>
++#include <linux/list.h>
++
++#include <linux/netfilter_ipv4/lockhelp.h>
++
++DECLARE_RWLOCK(ip_ct_gre_lock);
++#define ASSERT_READ_LOCK(x) MUST_BE_READ_LOCKED(&ip_ct_gre_lock)
++#define ASSERT_WRITE_LOCK(x) MUST_BE_WRITE_LOCKED(&ip_ct_gre_lock)
++
++#include <linux/netfilter_ipv4/listhelp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
++#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
++#include <linux/netfilter_ipv4/ip_conntrack_core.h>
++
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("netfilter connection tracking protocol helper for GRE");
++
++/* shamelessly stolen from ip_conntrack_proto_udp.c */
++#define GRE_TIMEOUT (30*HZ)
++#define GRE_STREAM_TIMEOUT (180*HZ)
++
++#if 0
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++ ": " format, ## args)
++#define DUMP_TUPLE_GRE(x) printk("%u.%u.%u.%u:0x%x -> %u.%u.%u.%u:0x%x:%u:0x%x\n", \
++ NIPQUAD((x)->src.ip), ntohl((x)->src.u.gre.key), \
++ NIPQUAD((x)->dst.ip), ntohl((x)->dst.u.gre.key))
++#else
++#define DEBUGP(x, args...)
++#define DUMP_TUPLE_GRE(x)
++#endif
++
++/* GRE KEYMAP HANDLING FUNCTIONS */
++static LIST_HEAD(gre_keymap_list);
++
++static inline int gre_key_cmpfn(const struct ip_ct_gre_keymap *km,
++ const struct ip_conntrack_tuple *t)
++{
++ return ((km->tuple.src.ip == t->src.ip) &&
++ (km->tuple.dst.ip == t->dst.ip) &&
++ (km->tuple.dst.protonum == t->dst.protonum) &&
++ (km->tuple.dst.u.all == t->dst.u.all));
++}
++
++/* look up the source key for a given tuple */
++static u_int32_t gre_keymap_lookup(struct ip_conntrack_tuple *t)
++{
++ struct ip_ct_gre_keymap *km;
++ u_int32_t key;
++
++ READ_LOCK(&ip_ct_gre_lock);
++ km = LIST_FIND(&gre_keymap_list, gre_key_cmpfn,
++ struct ip_ct_gre_keymap *, t);
++ if (!km) {
++ READ_UNLOCK(&ip_ct_gre_lock);
++ return 0;
++ }
++
++ key = km->tuple.src.u.gre.key;
++ READ_UNLOCK(&ip_ct_gre_lock);
++
++ return key;
++}
++
++/* add a single keymap entry, associate with specified expect */
++int ip_ct_gre_keymap_add(struct ip_conntrack_expect *exp,
++ struct ip_conntrack_tuple *t, int reply)
++{
++ struct ip_ct_gre_keymap *km;
++
++ km = kmalloc(sizeof(*km), GFP_ATOMIC);
++ if (!km)
++ return -1;
++
++ /* initializing list head should be sufficient */
++ memset(km, 0, sizeof(*km));
++
++ memcpy(&km->tuple, t, sizeof(*t));
++
++ if (!reply)
++ exp->proto.gre.keymap_orig = km;
++ else
++ exp->proto.gre.keymap_reply = km;
++
++ DEBUGP("adding new entry %p: ", km);
++ DUMP_TUPLE_GRE(&km->tuple);
++
++ WRITE_LOCK(&ip_ct_gre_lock);
++ list_append(&gre_keymap_list, km);
++ WRITE_UNLOCK(&ip_ct_gre_lock);
++
++ return 0;
++}
++
++/* change the tuple of a keymap entry (used by nat helper) */
++void ip_ct_gre_keymap_change(struct ip_ct_gre_keymap *km,
++ struct ip_conntrack_tuple *t)
++{
++ DEBUGP("changing entry %p to: ", km);
++ DUMP_TUPLE_GRE(t);
++
++ WRITE_LOCK(&ip_ct_gre_lock);
++ memcpy(&km->tuple, t, sizeof(km->tuple));
++ WRITE_UNLOCK(&ip_ct_gre_lock);
++}
++
++/* destroy the keymap entries associated with specified expect */
++void ip_ct_gre_keymap_destroy(struct ip_conntrack_expect *exp)
++{
++ DEBUGP("entering for exp %p\n", exp);
++ WRITE_LOCK(&ip_ct_gre_lock);
++ if (exp->proto.gre.keymap_orig) {
++ DEBUGP("removing %p from list\n", exp->proto.gre.keymap_orig);
++ list_del(&exp->proto.gre.keymap_orig->list);
++ kfree(exp->proto.gre.keymap_orig);
++ exp->proto.gre.keymap_orig = NULL;
++ }
++ if (exp->proto.gre.keymap_reply) {
++ DEBUGP("removing %p from list\n", exp->proto.gre.keymap_reply);
++ list_del(&exp->proto.gre.keymap_reply->list);
++ kfree(exp->proto.gre.keymap_reply);
++ exp->proto.gre.keymap_reply = NULL;
++ }
++ WRITE_UNLOCK(&ip_ct_gre_lock);
++}
++
++
++/* PUBLIC CONNTRACK PROTO HELPER FUNCTIONS */
++
++/* invert gre part of tuple */
++static int gre_invert_tuple(struct ip_conntrack_tuple *tuple,
++ const struct ip_conntrack_tuple *orig)
++{
++ tuple->dst.u.gre.key = orig->src.u.gre.key;
++ tuple->src.u.gre.key = orig->dst.u.gre.key;
++
++ return 1;
++}
++
++/* gre hdr info to tuple */
++static int gre_pkt_to_tuple(const void *datah, size_t datalen,
++ struct ip_conntrack_tuple *tuple)
++{
++ struct gre_hdr *grehdr = (struct gre_hdr *) datah;
++ struct gre_hdr_pptp *pgrehdr = (struct gre_hdr_pptp *) datah;
++ u_int32_t srckey;
++
++ /* core guarantees 8 protocol bytes, no need for size check */
++
++ switch (grehdr->version) {
++ case GRE_VERSION_1701:
++ if (!grehdr->key) {
++ DEBUGP("Can't track GRE without key\n");
++ return 0;
++ }
++ tuple->dst.u.gre.key = *(gre_key(grehdr));
++ break;
++
++ case GRE_VERSION_PPTP:
++ if (ntohs(grehdr->protocol) != GRE_PROTOCOL_PPTP) {
++ DEBUGP("GRE_VERSION_PPTP but unknown proto\n");
++ return 0;
++ }
++ tuple->dst.u.gre.key = htonl(ntohs(pgrehdr->call_id));
++ break;
++
++ default:
++ printk(KERN_WARNING "unknown GRE version %hu\n",
++ grehdr->version);
++ return 0;
++ }
++
++ srckey = gre_keymap_lookup(tuple);
++
++#if 0
++ DEBUGP("found src key %x for tuple ", ntohl(srckey));
++ DUMP_TUPLE_GRE(tuple);
++#endif
++ tuple->src.u.gre.key = srckey;
++
++ return 1;
++}
++
++/* print gre part of tuple */
++static unsigned int gre_print_tuple(char *buffer,
++ const struct ip_conntrack_tuple *tuple)
++{
++ return sprintf(buffer, "srckey=0x%x dstkey=0x%x ",
++ ntohl(tuple->src.u.gre.key),
++ ntohl(tuple->dst.u.gre.key));
++}
++
++/* print private data for conntrack */
++static unsigned int gre_print_conntrack(char *buffer,
++ const struct ip_conntrack *ct)
++{
++ return sprintf(buffer, "timeout=%u, stream_timeout=%u ",
++ (ct->proto.gre.timeout / HZ),
++ (ct->proto.gre.stream_timeout / HZ));
++}
++
++/* Returns verdict for packet, and may modify conntrack */
++static int gre_packet(struct ip_conntrack *ct,
++ struct iphdr *iph, size_t len,
++ enum ip_conntrack_info conntrackinfo)
++{
++ /* If we've seen traffic both ways, this is a GRE connection.
++ * Extend timeout. */
++ if (ct->status & IPS_SEEN_REPLY) {
++ ip_ct_refresh(ct, ct->proto.gre.stream_timeout);
++ /* Also, more likely to be important, and not a probe. */
++ set_bit(IPS_ASSURED_BIT, &ct->status);
++ } else
++ ip_ct_refresh(ct, ct->proto.gre.timeout);
++
++ return NF_ACCEPT;
++}
++
++/* Called when a new connection for this protocol found. */
++static int gre_new(struct ip_conntrack *ct,
++ struct iphdr *iph, size_t len)
++{
++ DEBUGP(": ");
++ DUMP_TUPLE_GRE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
++
++ /* initialize to sane value. Ideally a conntrack helper
++ * (e.g. in case of pptp) is increasing them */
++ ct->proto.gre.stream_timeout = GRE_STREAM_TIMEOUT;
++ ct->proto.gre.timeout = GRE_TIMEOUT;
++
++ return 1;
++}
++
++/* Called when a conntrack entry has already been removed from the hashes
++ * and is about to be deleted from memory */
++static void gre_destroy(struct ip_conntrack *ct)
++{
++ struct ip_conntrack_expect *master = ct->master;
++
++ DEBUGP(" entering\n");
++
++ if (!master) {
++ DEBUGP("no master exp for ct %p\n", ct);
++ return;
++ }
++
++ ip_ct_gre_keymap_destroy(master);
++}
++
++/* protocol helper struct */
++static struct ip_conntrack_protocol gre = { { NULL, NULL }, IPPROTO_GRE,
++ "gre",
++ gre_pkt_to_tuple,
++ gre_invert_tuple,
++ gre_print_tuple,
++ gre_print_conntrack,
++ gre_packet,
++ gre_new,
++ gre_destroy,
++ NULL,
++ THIS_MODULE };
++
++/* ip_conntrack_proto_gre initialization */
++static int __init init(void)
++{
++ int retcode;
++
++ if ((retcode = ip_conntrack_protocol_register(&gre))) {
++ printk(KERN_ERR "Unable to register conntrack protocol "
++ "helper for gre: %d\n", retcode);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++static void __exit fini(void)
++{
++ struct list_head *pos, *n;
++
++ /* delete all keymap entries */
++ WRITE_LOCK(&ip_ct_gre_lock);
++ list_for_each_safe(pos, n, &gre_keymap_list) {
++ DEBUGP("deleting keymap %p at module unload time\n", pos);
++ list_del(pos);
++ kfree(pos);
++ }
++ WRITE_UNLOCK(&ip_ct_gre_lock);
++
++ ip_conntrack_protocol_unregister(&gre);
++}
++
++EXPORT_SYMBOL(ip_ct_gre_keymap_add);
++EXPORT_SYMBOL(ip_ct_gre_keymap_change);
++EXPORT_SYMBOL(ip_ct_gre_keymap_destroy);
++
++module_init(init);
++module_exit(fini);
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_nat_core.c linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_core.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_nat_core.c 2005-01-19 15:10:13.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_core.c 2005-04-02 19:07:18.000000000 +0200
+@@ -424,7 +424,7 @@
+ *tuple = *orig_tuple;
+ while ((rptr = find_best_ips_proto_fast(tuple, mr, conntrack, hooknum))
+ != NULL) {
+- DEBUGP("Found best for "); DUMP_TUPLE(tuple);
++ DEBUGP("Found best for "); DUMP_TUPLE_RAW(tuple);
+ /* 3) The per-protocol part of the manip is made to
+ map into the range to make a unique tuple. */
+
+@@ -564,9 +564,9 @@
+ HOOK2MANIP(hooknum)==IP_NAT_MANIP_SRC ? "SRC" : "DST",
+ conntrack);
+ DEBUGP("Original: ");
+- DUMP_TUPLE(&orig_tp);
++ DUMP_TUPLE_RAW(&orig_tp);
+ DEBUGP("New: ");
+- DUMP_TUPLE(&new_tuple);
++ DUMP_TUPLE_RAW(&new_tuple);
+ #endif
+
+ /* We now have two tuples (SRCIP/SRCPT/DSTIP/DSTPT):
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_nat_pptp.c linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_pptp.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_nat_pptp.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_pptp.c 2005-04-02 19:14:52.000000000 +0200
+@@ -0,0 +1,475 @@
++/*
++ * ip_nat_pptp.c - Version 1.5
++ *
++ * NAT support for PPTP (Point to Point Tunneling Protocol).
++ * PPTP is a a protocol for creating virtual private networks.
++ * It is a specification defined by Microsoft and some vendors
++ * working with Microsoft. PPTP is built on top of a modified
++ * version of the Internet Generic Routing Encapsulation Protocol.
++ * GRE is defined in RFC 1701 and RFC 1702. Documentation of
++ * PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ * TODO: - Support for multiple calls within one session
++ * (needs netfilter newnat code)
++ * - NAT to a unique tuple, not to TCP source port
++ * (needs netfilter tuple reservation)
++ *
++ * Changes:
++ * 2002-02-10 - Version 1.3
++ * - Use ip_nat_mangle_tcp_packet() because of cloned skb's
++ * in local connections (Philip Craig <philipc@snapgear.com>)
++ * - add checks for magicCookie and pptp version
++ * - make argument list of pptp_{out,in}bound_packet() shorter
++ * - move to C99 style initializers
++ * - print version number at module loadtime
++ * 2003-09-22 - Version 1.5
++ * - use SNATed tcp sourceport as callid, since we get called before
++ * TCP header is mangled (Philip Craig <philipc@snapgear.com>)
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <net/tcp.h>
++#include <linux/netfilter_ipv4/ip_nat.h>
++#include <linux/netfilter_ipv4/ip_nat_rule.h>
++#include <linux/netfilter_ipv4/ip_nat_helper.h>
++#include <linux/netfilter_ipv4/ip_nat_pptp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
++
++#define IP_NAT_PPTP_VERSION "1.5"
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("Netfilter NAT helper module for PPTP");
++
++
++#if 0
++#include "ip_conntrack_pptp_priv.h"
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++ ": " format, ## args)
++#else
++#define DEBUGP(format, args...)
++#endif
++
++static unsigned int
++pptp_nat_expected(struct sk_buff **pskb,
++ unsigned int hooknum,
++ struct ip_conntrack *ct,
++ struct ip_nat_info *info)
++{
++ struct ip_conntrack *master = master_ct(ct);
++ struct ip_nat_multi_range mr;
++ struct ip_ct_pptp_master *ct_pptp_info;
++ struct ip_nat_pptp *nat_pptp_info;
++ u_int32_t newip, newcid;
++ int ret;
++
++ IP_NF_ASSERT(info);
++ IP_NF_ASSERT(master);
++ IP_NF_ASSERT(!(info->initialized & (1 << HOOK2MANIP(hooknum))));
++
++ DEBUGP("we have a connection!\n");
++
++ LOCK_BH(&ip_pptp_lock);
++ ct_pptp_info = &master->help.ct_pptp_info;
++ nat_pptp_info = &master->nat.help.nat_pptp_info;
++
++ /* need to alter GRE tuple because conntrack expectfn() used 'wrong'
++ * (unmanipulated) values */
++ if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_DST) {
++ DEBUGP("completing tuples with NAT info \n");
++ /* we can do this, since we're unconfirmed */
++ if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.gre.key ==
++ htonl(ct_pptp_info->pac_call_id)) {
++ /* assume PNS->PAC */
++ ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++ htonl(nat_pptp_info->pns_call_id);
++ ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++ htonl(nat_pptp_info->pns_call_id);
++ newip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
++ newcid = htonl(nat_pptp_info->pac_call_id);
++ } else {
++ /* assume PAC->PNS */
++ ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++ htonl(nat_pptp_info->pac_call_id);
++ ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++ htonl(nat_pptp_info->pac_call_id);
++ newip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
++ newcid = htonl(nat_pptp_info->pns_call_id);
++ }
++ } else {
++ if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.gre.key ==
++ htonl(ct_pptp_info->pac_call_id)) {
++ /* assume PNS->PAC */
++ newip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++ newcid = htonl(ct_pptp_info->pns_call_id);
++ }
++ else {
++ /* assume PAC->PNS */
++ newip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
++ newcid = htonl(ct_pptp_info->pac_call_id);
++ }
++ }
++
++ mr.rangesize = 1;
++ mr.range[0].flags = IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED;
++ mr.range[0].min_ip = mr.range[0].max_ip = newip;
++ mr.range[0].min = mr.range[0].max =
++ ((union ip_conntrack_manip_proto ) { newcid });
++ DEBUGP("change ip to %u.%u.%u.%u\n",
++ NIPQUAD(newip));
++ DEBUGP("change key to 0x%x\n", ntohl(newcid));
++ ret = ip_nat_setup_info(ct, &mr, hooknum);
++
++ UNLOCK_BH(&ip_pptp_lock);
++
++ return ret;
++
++}
++
++/* outbound packets == from PNS to PAC */
++static inline unsigned int
++pptp_outbound_pkt(struct sk_buff **pskb,
++ struct ip_conntrack *ct,
++ enum ip_conntrack_info ctinfo,
++ struct ip_conntrack_expect *exp)
++
++{
++ struct iphdr *iph = (*pskb)->nh.iph;
++ struct tcphdr *tcph = (void *) iph + iph->ihl*4;
++ struct pptp_pkt_hdr *pptph = (struct pptp_pkt_hdr *)
++ ((void *)tcph + tcph->doff*4);
++
++ struct PptpControlHeader *ctlh;
++ union pptp_ctrl_union pptpReq;
++ struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info;
++ struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
++
++ u_int16_t msg, *cid = NULL, new_callid;
++
++ /* FIXME: size checks !!! */
++ ctlh = (struct PptpControlHeader *) ((void *) pptph + sizeof(*pptph));
++ pptpReq.rawreq = (void *) ((void *) ctlh + sizeof(*ctlh));
++
++ new_callid = htons(ct_pptp_info->pns_call_id);
++
++ switch (msg = ntohs(ctlh->messageType)) {
++ case PPTP_OUT_CALL_REQUEST:
++ cid = &pptpReq.ocreq->callID;
++ /* FIXME: ideally we would want to reserve a call ID
++ * here. current netfilter NAT core is not able to do
++ * this :( For now we use TCP source port. This breaks
++ * multiple calls within one control session */
++
++ /* save original call ID in nat_info */
++ nat_pptp_info->pns_call_id = ct_pptp_info->pns_call_id;
++
++ /* don't use tcph->source since we are at a DSTmanip
++ * hook (e.g. PREROUTING) and pkt is not mangled yet */
++ new_callid = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.tcp.port;
++
++ /* save new call ID in ct info */
++ ct_pptp_info->pns_call_id = ntohs(new_callid);
++ break;
++ case PPTP_IN_CALL_REPLY:
++ cid = &pptpReq.icreq->callID;
++ break;
++ case PPTP_CALL_CLEAR_REQUEST:
++ cid = &pptpReq.clrreq->callID;
++ break;
++ default:
++ DEBUGP("unknown outbound packet 0x%04x:%s\n", msg,
++ (msg <= PPTP_MSG_MAX)? strMName[msg]:strMName[0]);
++ /* fall through */
++
++ case PPTP_SET_LINK_INFO:
++ /* only need to NAT in case PAC is behind NAT box */
++ case PPTP_START_SESSION_REQUEST:
++ case PPTP_START_SESSION_REPLY:
++ case PPTP_STOP_SESSION_REQUEST:
++ case PPTP_STOP_SESSION_REPLY:
++ case PPTP_ECHO_REQUEST:
++ case PPTP_ECHO_REPLY:
++ /* no need to alter packet */
++ return NF_ACCEPT;
++ }
++
++ IP_NF_ASSERT(cid);
++
++ DEBUGP("altering call id from 0x%04x to 0x%04x\n",
++ ntohs(*cid), ntohs(new_callid));
++
++ /* mangle packet */
++ ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, (void *)cid - (void *)pptph,
++ sizeof(new_callid), (char *)&new_callid,
++ sizeof(new_callid));
++
++ return NF_ACCEPT;
++}
++
++/* inbound packets == from PAC to PNS */
++static inline unsigned int
++pptp_inbound_pkt(struct sk_buff **pskb,
++ struct ip_conntrack *ct,
++ enum ip_conntrack_info ctinfo,
++ struct ip_conntrack_expect *oldexp)
++{
++ struct iphdr *iph = (*pskb)->nh.iph;
++ struct tcphdr *tcph = (void *) iph + iph->ihl*4;
++ struct pptp_pkt_hdr *pptph = (struct pptp_pkt_hdr *)
++ ((void *)tcph + tcph->doff*4);
++
++ struct PptpControlHeader *ctlh;
++ union pptp_ctrl_union pptpReq;
++ struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info;
++ struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
++
++ u_int16_t msg, new_cid = 0, new_pcid, *pcid = NULL, *cid = NULL;
++ u_int32_t old_dst_ip;
++
++ struct ip_conntrack_tuple t, inv_t;
++ struct ip_conntrack_tuple *orig_t, *reply_t;
++
++ /* FIXME: size checks !!! */
++ ctlh = (struct PptpControlHeader *) ((void *) pptph + sizeof(*pptph));
++ pptpReq.rawreq = (void *) ((void *) ctlh + sizeof(*ctlh));
++
++ new_pcid = htons(nat_pptp_info->pns_call_id);
++
++ switch (msg = ntohs(ctlh->messageType)) {
++ case PPTP_OUT_CALL_REPLY:
++ pcid = &pptpReq.ocack->peersCallID;
++ cid = &pptpReq.ocack->callID;
++ if (!oldexp) {
++ DEBUGP("outcall but no expectation\n");
++ break;
++ }
++ old_dst_ip = oldexp->tuple.dst.ip;
++ t = oldexp->tuple;
++ invert_tuplepr(&inv_t, &t);
++
++ /* save original PAC call ID in nat_info */
++ nat_pptp_info->pac_call_id = ct_pptp_info->pac_call_id;
++
++ /* alter expectation */
++ orig_t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
++ reply_t = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
++ if (t.src.ip == orig_t->src.ip && t.dst.ip == orig_t->dst.ip) {
++ /* expectation for PNS->PAC direction */
++ t.src.u.gre.key = htonl(nat_pptp_info->pns_call_id);
++ t.dst.u.gre.key = htonl(ct_pptp_info->pac_call_id);
++ inv_t.src.ip = reply_t->src.ip;
++ inv_t.dst.ip = reply_t->dst.ip;
++ inv_t.src.u.gre.key = htonl(nat_pptp_info->pac_call_id);
++ inv_t.dst.u.gre.key = htonl(ct_pptp_info->pns_call_id);
++ } else {
++ /* expectation for PAC->PNS direction */
++ t.src.u.gre.key = htonl(nat_pptp_info->pac_call_id);
++ t.dst.u.gre.key = htonl(ct_pptp_info->pns_call_id);
++ inv_t.src.ip = orig_t->src.ip;
++ inv_t.dst.ip = orig_t->dst.ip;
++ inv_t.src.u.gre.key = htonl(nat_pptp_info->pns_call_id);
++ inv_t.dst.u.gre.key = htonl(ct_pptp_info->pac_call_id);
++ }
++
++ if (!ip_conntrack_change_expect(oldexp, &t)) {
++ DEBUGP("successfully changed expect\n");
++ } else {
++ DEBUGP("can't change expect\n");
++ }
++ ip_ct_gre_keymap_change(oldexp->proto.gre.keymap_orig, &t);
++ ip_ct_gre_keymap_change(oldexp->proto.gre.keymap_reply, &inv_t);
++ break;
++ case PPTP_IN_CALL_CONNECT:
++ pcid = &pptpReq.iccon->peersCallID;
++ if (!oldexp)
++ break;
++ old_dst_ip = oldexp->tuple.dst.ip;
++ t = oldexp->tuple;
++
++ /* alter expectation, no need for callID */
++ if (t.dst.ip == ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip) {
++ /* expectation for PNS->PAC direction */
++ t.src.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++ } else {
++ /* expectation for PAC->PNS direction */
++ t.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++ }
++
++ if (!ip_conntrack_change_expect(oldexp, &t)) {
++ DEBUGP("successfully changed expect\n");
++ } else {
++ DEBUGP("can't change expect\n");
++ }
++ break;
++ case PPTP_IN_CALL_REQUEST:
++ /* only need to nat in case PAC is behind NAT box */
++ break;
++ case PPTP_WAN_ERROR_NOTIFY:
++ pcid = &pptpReq.wanerr->peersCallID;
++ break;
++ case PPTP_CALL_DISCONNECT_NOTIFY:
++ pcid = &pptpReq.disc->callID;
++ break;
++
++ default:
++ DEBUGP("unknown inbound packet %s\n",
++ (msg <= PPTP_MSG_MAX)? strMName[msg]:strMName[0]);
++ /* fall through */
++
++ case PPTP_START_SESSION_REQUEST:
++ case PPTP_START_SESSION_REPLY:
++ case PPTP_STOP_SESSION_REQUEST:
++ case PPTP_STOP_SESSION_REPLY:
++ case PPTP_ECHO_REQUEST:
++ case PPTP_ECHO_REPLY:
++ /* no need to alter packet */
++ return NF_ACCEPT;
++ }
++
++ /* mangle packet */
++ IP_NF_ASSERT(pcid);
++ DEBUGP("altering peer call id from 0x%04x to 0x%04x\n",
++ ntohs(*pcid), ntohs(new_pcid));
++ ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, (void *)pcid - (void *)pptph,
++ sizeof(new_pcid), (char *)&new_pcid,
++ sizeof(new_pcid));
++
++ if (new_cid) {
++ IP_NF_ASSERT(cid);
++ DEBUGP("altering call id from 0x%04x to 0x%04x\n",
++ ntohs(*cid), ntohs(new_cid));
++ ip_nat_mangle_tcp_packet(pskb, ct, ctinfo,
++ (void *)cid - (void *)pptph,
++ sizeof(new_cid), (char *)&new_cid,
++ sizeof(new_cid));
++ }
++
++ /* great, at least we don't need to resize packets */
++ return NF_ACCEPT;
++}
++
++
++static unsigned int tcp_help(struct ip_conntrack *ct,
++ struct ip_conntrack_expect *exp,
++ struct ip_nat_info *info,
++ enum ip_conntrack_info ctinfo,
++ unsigned int hooknum, struct sk_buff **pskb)
++{
++ struct iphdr *iph = (*pskb)->nh.iph;
++ struct tcphdr *tcph = (void *) iph + iph->ihl*4;
++ unsigned int datalen = (*pskb)->len - iph->ihl*4 - tcph->doff*4;
++ struct pptp_pkt_hdr *pptph;
++
++ int dir;
++
++ DEBUGP("entering\n");
++
++ /* Only mangle things once: DST for original direction
++ and SRC for reply direction. */
++ dir = CTINFO2DIR(ctinfo);
++ if (!((HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
++ && dir == IP_CT_DIR_ORIGINAL)
++ || (HOOK2MANIP(hooknum) == IP_NAT_MANIP_DST
++ && dir == IP_CT_DIR_REPLY))) {
++ DEBUGP("Not touching dir %s at hook %s\n",
++ dir == IP_CT_DIR_ORIGINAL ? "ORIG" : "REPLY",
++ hooknum == NF_IP_POST_ROUTING ? "POSTROUTING"
++ : hooknum == NF_IP_PRE_ROUTING ? "PREROUTING"
++ : hooknum == NF_IP_LOCAL_OUT ? "OUTPUT"
++ : hooknum == NF_IP_LOCAL_IN ? "INPUT" : "???");
++ return NF_ACCEPT;
++ }
++
++ /* if packet is too small, just skip it */
++ if (datalen < sizeof(struct pptp_pkt_hdr)+
++ sizeof(struct PptpControlHeader)) {
++ DEBUGP("pptp packet too short\n");
++ return NF_ACCEPT;
++ }
++
++ pptph = (struct pptp_pkt_hdr *) ((void *)tcph + tcph->doff*4);
++
++ /* if it's not a control message, we can't handle it */
++ if (ntohs(pptph->packetType) != PPTP_PACKET_CONTROL ||
++ ntohl(pptph->magicCookie) != PPTP_MAGIC_COOKIE) {
++ DEBUGP("not a pptp control packet\n");
++ return NF_ACCEPT;
++ }
++
++ LOCK_BH(&ip_pptp_lock);
++
++ if (dir == IP_CT_DIR_ORIGINAL) {
++ /* reuqests sent by client to server (PNS->PAC) */
++ pptp_outbound_pkt(pskb, ct, ctinfo, exp);
++ } else {
++ /* response from the server to the client (PAC->PNS) */
++ pptp_inbound_pkt(pskb, ct, ctinfo, exp);
++ }
++
++ UNLOCK_BH(&ip_pptp_lock);
++
++ return NF_ACCEPT;
++}
++
++/* nat helper struct for control connection */
++static struct ip_nat_helper pptp_tcp_helper = {
++ .list = { NULL, NULL },
++ .name = "pptp",
++ .flags = IP_NAT_HELPER_F_ALWAYS,
++ .me = THIS_MODULE,
++ .tuple = { .src = { .ip = 0,
++ .u = { .tcp = { .port =
++ __constant_htons(PPTP_CONTROL_PORT) }
++ }
++ },
++ .dst = { .ip = 0,
++ .u = { .all = 0 },
++ .protonum = IPPROTO_TCP
++ }
++ },
++
++ .mask = { .src = { .ip = 0,
++ .u = { .tcp = { .port = 0xFFFF } }
++ },
++ .dst = { .ip = 0,
++ .u = { .all = 0 },
++ .protonum = 0xFFFF
++ }
++ },
++ .help = tcp_help,
++ .expect = pptp_nat_expected
++};
++
++
++static int __init init(void)
++{
++ DEBUGP("%s: registering NAT helper\n", __FILE__);
++ if (ip_nat_helper_register(&pptp_tcp_helper)) {
++ printk(KERN_ERR "Unable to register NAT application helper "
++ "for pptp\n");
++ return -EIO;
++ }
++
++ printk("ip_nat_pptp version %s loaded\n", IP_NAT_PPTP_VERSION);
++ return 0;
++}
++
++static void __exit fini(void)
++{
++ DEBUGP("cleanup_module\n" );
++ ip_nat_helper_unregister(&pptp_tcp_helper);
++ printk("ip_nat_pptp version %s unloaded\n", IP_NAT_PPTP_VERSION);
++}
++
++module_init(init);
++module_exit(fini);
+Binary files linux-2.4.29-old/net/ipv4/netfilter/.ip_nat_pptp.c.swp and linux-2.4.29-dev/net/ipv4/netfilter/.ip_nat_pptp.c.swp differ
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_nat_proto_gre.c linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_proto_gre.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_nat_proto_gre.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_proto_gre.c 2005-04-02 19:15:10.000000000 +0200
+@@ -0,0 +1,202 @@
++/*
++ * ip_nat_proto_gre.c - Version 1.2
++ *
++ * NAT protocol helper module for GRE.
++ *
++ * GRE is a generic encapsulation protocol, which is generally not very
++ * suited for NAT, as it has no protocol-specific part as port numbers.
++ *
++ * It has an optional key field, which may help us distinguishing two
++ * connections between the same two hosts.
++ *
++ * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784
++ *
++ * PPTP is built on top of a modified version of GRE, and has a mandatory
++ * field called "CallID", which serves us for the same purpose as the key
++ * field in plain GRE.
++ *
++ * Documentation about PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/netfilter_ipv4/ip_nat.h>
++#include <linux/netfilter_ipv4/ip_nat_rule.h>
++#include <linux/netfilter_ipv4/ip_nat_protocol.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
++
++#if 0
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++ ": " format, ## args)
++#else
++#define DEBUGP(x, args...)
++#endif
++
++/* is key in given range between min and max */
++static int
++gre_in_range(const struct ip_conntrack_tuple *tuple,
++ enum ip_nat_manip_type maniptype,
++ const union ip_conntrack_manip_proto *min,
++ const union ip_conntrack_manip_proto *max)
++{
++ u_int32_t key;
++
++ if (maniptype == IP_NAT_MANIP_SRC)
++ key = tuple->src.u.gre.key;
++ else
++ key = tuple->dst.u.gre.key;
++
++ return ntohl(key) >= ntohl(min->gre.key)
++ && ntohl(key) <= ntohl(max->gre.key);
++}
++
++/* generate unique tuple ... */
++static int
++gre_unique_tuple(struct ip_conntrack_tuple *tuple,
++ const struct ip_nat_range *range,
++ enum ip_nat_manip_type maniptype,
++ const struct ip_conntrack *conntrack)
++{
++ u_int32_t min, i, range_size;
++ u_int32_t key = 0, *keyptr;
++
++ if (maniptype == IP_NAT_MANIP_SRC)
++ keyptr = &tuple->src.u.gre.key;
++ else
++ keyptr = &tuple->dst.u.gre.key;
++
++ if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)) {
++
++ DEBUGP("%p: NATing GRE PPTP\n", conntrack);
++ min = 1;
++ range_size = 0xffff;
++
++ } else {
++ min = ntohl(range->min.gre.key);
++ range_size = ntohl(range->max.gre.key) - min + 1;
++ }
++
++ DEBUGP("min = %u, range_size = %u\n", min, range_size);
++
++ for (i = 0; i < range_size; i++, key++) {
++ *keyptr = htonl(min + key % range_size);
++ if (!ip_nat_used_tuple(tuple, conntrack))
++ return 1;
++ }
++
++ DEBUGP("%p: no NAT mapping\n", conntrack);
++
++ return 0;
++}
++
++/* manipulate a GRE packet according to maniptype */
++static void
++gre_manip_pkt(struct iphdr *iph, size_t len,
++ const struct ip_conntrack_manip *manip,
++ enum ip_nat_manip_type maniptype)
++{
++ struct gre_hdr *greh = (struct gre_hdr *)((u_int32_t *)iph+iph->ihl);
++ struct gre_hdr_pptp *pgreh = (struct gre_hdr_pptp *) greh;
++
++ /* we only have destination manip of a packet, since 'source key'
++ * is not present in the packet itself */
++ if (maniptype == IP_NAT_MANIP_DST) {
++ /* key manipulation is always dest */
++ switch (greh->version) {
++ case 0:
++ if (!greh->key) {
++ DEBUGP("can't nat GRE w/o key\n");
++ break;
++ }
++ if (greh->csum) {
++ /* FIXME: Never tested this code... */
++ *(gre_csum(greh)) =
++ ip_nat_cheat_check(~*(gre_key(greh)),
++ manip->u.gre.key,
++ *(gre_csum(greh)));
++ }
++ *(gre_key(greh)) = manip->u.gre.key;
++ break;
++ case GRE_VERSION_PPTP:
++ DEBUGP("call_id -> 0x%04x\n",
++ ntohl(manip->u.gre.key));
++ pgreh->call_id = htons(ntohl(manip->u.gre.key));
++ break;
++ default:
++ DEBUGP("can't nat unknown GRE version\n");
++ break;
++ }
++ }
++}
++
++/* print out a nat tuple */
++static unsigned int
++gre_print(char *buffer,
++ const struct ip_conntrack_tuple *match,
++ const struct ip_conntrack_tuple *mask)
++{
++ unsigned int len = 0;
++
++ if (mask->src.u.gre.key)
++ len += sprintf(buffer + len, "srckey=0x%x ",
++ ntohl(match->src.u.gre.key));
++
++ if (mask->dst.u.gre.key)
++ len += sprintf(buffer + len, "dstkey=0x%x ",
++ ntohl(match->src.u.gre.key));
++
++ return len;
++}
++
++/* print a range of keys */
++static unsigned int
++gre_print_range(char *buffer, const struct ip_nat_range *range)
++{
++ if (range->min.gre.key != 0
++ || range->max.gre.key != 0xFFFF) {
++ if (range->min.gre.key == range->max.gre.key)
++ return sprintf(buffer, "key 0x%x ",
++ ntohl(range->min.gre.key));
++ else
++ return sprintf(buffer, "keys 0x%u-0x%u ",
++ ntohl(range->min.gre.key),
++ ntohl(range->max.gre.key));
++ } else
++ return 0;
++}
++
++/* nat helper struct */
++static struct ip_nat_protocol gre =
++ { { NULL, NULL }, "GRE", IPPROTO_GRE,
++ gre_manip_pkt,
++ gre_in_range,
++ gre_unique_tuple,
++ gre_print,
++ gre_print_range
++ };
++
++static int __init init(void)
++{
++ if (ip_nat_protocol_register(&gre))
++ return -EIO;
++
++ return 0;
++}
++
++static void __exit fini(void)
++{
++ ip_nat_protocol_unregister(&gre);
++}
++
++module_init(init);
++module_exit(fini);
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/Makefile linux-2.4.29-dev/net/ipv4/netfilter/Makefile
+--- linux-2.4.29-old/net/ipv4/netfilter/Makefile 2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/net/ipv4/netfilter/Makefile 2005-04-02 19:07:18.000000000 +0200
+@@ -36,23 +36,32 @@
+ ifdef CONFIG_IP_NF_AMANDA
+ export-objs += ip_conntrack_amanda.o
+ endif
+-
+ obj-$(CONFIG_IP_NF_TFTP) += ip_conntrack_tftp.o
+ obj-$(CONFIG_IP_NF_FTP) += ip_conntrack_ftp.o
+ ifdef CONFIG_IP_NF_FTP
+ export-objs += ip_conntrack_ftp.o
+ endif
+-
+ obj-$(CONFIG_IP_NF_IRC) += ip_conntrack_irc.o
+ ifdef CONFIG_IP_NF_IRC
+ export-objs += ip_conntrack_irc.o
+ endif
++obj-$(CONFIG_IP_NF_CT_PROTO_GRE) += ip_conntrack_proto_gre.o
++ifdef CONFIG_IP_NF_CT_PROTO_GRE
++ export-objs += ip_conntrack_proto_gre.o
++endif
++obj-$(CONFIG_IP_NF_PPTP) += ip_conntrack_pptp.o
++ifdef CONFIG_IP_NF_NAT_PPTP
++ export-objs += ip_conntrack_pptp.o
++endif
++
+
+ # NAT helpers
+ obj-$(CONFIG_IP_NF_NAT_AMANDA) += ip_nat_amanda.o
+ obj-$(CONFIG_IP_NF_NAT_TFTP) += ip_nat_tftp.o
+ obj-$(CONFIG_IP_NF_NAT_FTP) += ip_nat_ftp.o
+ obj-$(CONFIG_IP_NF_NAT_IRC) += ip_nat_irc.o
++obj-$(CONFIG_IP_NF_NAT_PROTO_GRE) += ip_nat_proto_gre.o
++obj-$(CONFIG_IP_NF_NAT_PPTP) += ip_nat_pptp.o
+
+ # generic IP tables
+ obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
projects / openwrt.git / commitdiff