+++ /dev/null
---- a/include/linux/netfilter_ipv4/ip_conntrack.h
-+++ b/include/linux/netfilter_ipv4/ip_conntrack.h
-@@ -50,16 +50,19 @@ enum ip_conntrack_status {
-
- #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 @@ union ip_conntrack_expect_proto {
-
- #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 @@ union ip_conntrack_expect_help {
- 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 @@ union ip_conntrack_help {
- /* 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
-
---- /dev/null
-+++ b/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
-@@ -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 */
---- /dev/null
-+++ b/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h
-@@ -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 */
---- a/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
-+++ b/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
-@@ -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 @@ union ip_conntrack_manip_proto
- struct {
- u_int16_t id;
- } icmp;
-+ struct {
-+ u_int32_t key;
-+ } gre;
- };
-
- /* The manipulable part of the tuple. */
-@@ -44,7 +47,7 @@ struct ip_conntrack_tuple
- 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 ip_conntrack_tuple
- struct {
- u_int8_t type, code;
- } icmp;
-+ struct {
-+ u_int32_t key;
-+ } gre;
- } u;
-
- /* The protocol. */
-@@ -80,10 +86,16 @@ enum ip_conntrack_dir
- #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)
-
---- /dev/null
-+++ b/include/linux/netfilter_ipv4/ip_nat_pptp.h
-@@ -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 */
---- a/net/ipv4/netfilter/Config.in
-+++ b/net/ipv4/netfilter/Config.in
-@@ -10,6 +10,8 @@ if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ];
- 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
-@@ -63,6 +65,20 @@ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ];
- 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
---- a/net/ipv4/netfilter/ip_conntrack_core.c
-+++ b/net/ipv4/netfilter/ip_conntrack_core.c
-@@ -143,6 +143,8 @@ ip_ct_get_tuple(const struct iphdr *iph,
- 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);
-@@ -158,6 +160,8 @@ invert_tuple(struct ip_conntrack_tuple *
- 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);
- }
-
-@@ -970,8 +974,8 @@ int ip_conntrack_expect_related(struct i
- * 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,
-@@ -1089,15 +1093,14 @@ int ip_conntrack_change_expect(struct ip
-
- 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 */
---- /dev/null
-+++ b/net/ipv4/netfilter/ip_conntrack_pptp_priv.h
-@@ -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
---- /dev/null
-+++ b/net/ipv4/netfilter/ip_conntrack_proto_gre.c
-@@ -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_acct(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_acct(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);
---- a/net/ipv4/netfilter/ip_nat_core.c
-+++ b/net/ipv4/netfilter/ip_nat_core.c
-@@ -424,7 +424,7 @@ get_unique_tuple(struct ip_conntrack_tup
- *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 @@ ip_nat_setup_info(struct ip_conntrack *c
- 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):
---- /dev/null
-+++ b/net/ipv4/netfilter/ip_nat_pptp.c
-@@ -0,0 +1,482 @@
-+/*
-+ * 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");
-+ }
-+ if (oldexp->proto.gre.keymap_orig)
-+ ip_ct_gre_keymap_change(oldexp->proto.gre.keymap_orig,
-+ &t);
-+ if (oldexp->proto.gre.keymap_reply)
-+ 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;
-+ case PPTP_SET_LINK_INFO:
-+ pcid = &pptpReq.setlink->peersCallID;
-+ 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);
---- /dev/null
-+++ b/net/ipv4/netfilter/ip_nat_proto_gre.c
-@@ -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);
---- a/net/ipv4/netfilter/Makefile
-+++ b/net/ipv4/netfilter/Makefile
-@@ -36,23 +36,32 @@ obj-$(CONFIG_IP_NF_AMANDA) += ip_conntra
- ifdef CONFIG_IP_NF_AMANDA
- export-objs += ip_conntrack_amanda.o
- endif
--
- obj-$(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
---- /dev/null
-+++ b/net/ipv4/netfilter/ip_conntrack_pptp.c
-@@ -0,0 +1,635 @@
-+/*
-+ * 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;
-+ enum ip_conntrack_info ctinfo;
-+ struct iphdr *iph;
-+
-+ /* 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_acct(exp->sibling, ctinfo, iph, 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);
projects / openwrt / staging / lynxis.git / commitdiff