netfilter patches must be applied before other kernel patches to avoid breaking patch-o-matic

SVN-Revision: 163

1 files changed, 5834 insertions, 0 deletions

diff --git a/obsolete-buildroot/sources/openwrt/kernel/netfilter/patches/100-revert_netfilter.patch b/obsolete-buildroot/sources/openwrt/kernel/netfilter/patches/100-revert_netfilter.patch
new file mode 100644
index 0000000..611261f
--- /dev/null
+++ b/obsolete-buildroot/sources/openwrt/kernel/netfilter/patches/100-revert_netfilter.patch
@@ -0,0 +1,5834 @@
+diff -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack.h	2003-08-12 07:43:11.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack.h	2004-05-09 04:13:03.000000000 -0400
+@@ -45,39 +45,27 @@
+ 
+ #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_gre gre;
+ 	struct ip_ct_tcp tcp;
+ 	struct ip_ct_icmp icmp;
+ };
+ 
+ union ip_conntrack_expect_proto {
+ 	/* insert expect proto private data here */
+-	struct ip_ct_gre_expect gre;
+ };
+ 
+ /* Add protocol helper include file here */
+-#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_mms.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_h323.h>
+-
+ #include <linux/netfilter_ipv4/ip_conntrack_ftp.h>
+ #include <linux/netfilter_ipv4/ip_conntrack_irc.h>
+-#include <linux/netfilter_ipv4/ip_autofw.h>
+ 
+ /* per expectation: application helper private data */
+ union ip_conntrack_expect_help {
+ 	/* insert conntrack helper private data (expect) here */
+-	struct ip_ct_pptp_expect exp_pptp_info;
+-	struct ip_ct_mms_expect exp_mms_info;
+-	struct ip_ct_h225_expect exp_h225_info;
+ 	struct ip_ct_ftp_expect exp_ftp_info;
+ 	struct ip_ct_irc_expect exp_irc_info;
+-	struct ip_autofw_expect exp_autofw_info;
+ 
+ #ifdef CONFIG_IP_NF_NAT_NEEDED
+ 	union {
+@@ -89,21 +77,16 @@
+ /* per conntrack: application helper private data */
+ union ip_conntrack_help {
+ 	/* insert conntrack helper private data (master) here */
+-	struct ip_ct_pptp_master ct_pptp_info;
+-	struct ip_ct_mms_master ct_mms_info;
+-	struct ip_ct_h225_master ct_h225_info;
+ 	struct ip_ct_ftp_master ct_ftp_info;
+ 	struct ip_ct_irc_master ct_irc_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
+ 
+@@ -275,9 +258,5 @@
+ }
+ 
+ extern unsigned int ip_conntrack_htable_size;
+-
+-/* connection tracking time out variables. */
+-extern int sysctl_ip_conntrack_tcp_timeouts[10];
+-extern int sysctl_ip_conntrack_udp_timeouts[2];
+ #endif /* __KERNEL__ */
+ #endif /* _IP_CONNTRACK_H */
+diff -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack_h323.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack_h323.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack_h323.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack_h323.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,30 +0,0 @@
+-#ifndef _IP_CONNTRACK_H323_H
+-#define _IP_CONNTRACK_H323_H
+-/* H.323 connection tracking. */
+-
+-#ifdef __KERNEL__
+-/* Protects H.323 related data */
+-DECLARE_LOCK_EXTERN(ip_h323_lock);
+-#endif
+-
+-/* Default H.225 port */
+-#define H225_PORT	1720
+-
+-/* This structure is per expected connection */
+-struct ip_ct_h225_expect {
+-	u_int16_t port;			/* Port of the H.225 helper/RTCP/RTP channel */
+-	enum ip_conntrack_dir dir;	/* Direction of the original connection */
+-	unsigned int offset;		/* offset of the address in the payload */
+-};
+-
+-/* This structure exists only once per master */
+-struct ip_ct_h225_master {
+-	int is_h225;				/* H.225 or H.245 connection */
+-#ifdef CONFIG_IP_NF_NAT_NEEDED
+-	enum ip_conntrack_dir dir;		/* Direction of the original connection */
+-	u_int32_t seq[IP_CT_DIR_MAX];		/* Exceptional packet mangling for signal addressess... */
+-	unsigned int offset[IP_CT_DIR_MAX];	/* ...and the offset of the addresses in the payload */
+-#endif
+-};
+-
+-#endif /* _IP_CONNTRACK_H323_H */
+diff -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack_mms.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack_mms.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack_mms.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack_mms.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,31 +0,0 @@
+-#ifndef _IP_CONNTRACK_MMS_H
+-#define _IP_CONNTRACK_MMS_H
+-/* MMS tracking. */
+-
+-#ifdef __KERNEL__
+-#include <linux/netfilter_ipv4/lockhelp.h>
+-
+-DECLARE_LOCK_EXTERN(ip_mms_lock);
+-
+-#define MMS_PORT                         1755
+-#define MMS_SRV_MSG_ID                   196610
+-
+-#define MMS_SRV_MSG_OFFSET               36
+-#define MMS_SRV_UNICODE_STRING_OFFSET    60
+-#define MMS_SRV_CHUNKLENLV_OFFSET        16
+-#define MMS_SRV_CHUNKLENLM_OFFSET        32
+-#define MMS_SRV_MESSAGELENGTH_OFFSET     8
+-#endif
+-
+-/* This structure is per expected connection */
+-struct ip_ct_mms_expect {
+-	u_int32_t len;
+-	u_int32_t padding;
+-	u_int16_t port;
+-};
+-
+-/* This structure exists only once per master */
+-struct ip_ct_mms_master {
+-};
+-
+-#endif /* _IP_CONNTRACK_MMS_H */
+diff -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack_pptp.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack_pptp.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack_pptp.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,313 +0,0 @@
+-/* 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 PptpStopSessionReqest	*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 -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,121 +0,0 @@
+-#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__
+-
+-/* structure for original <-> reply keymap */
+-struct ip_ct_gre_keymap {
+-	struct list_head list;
+-
+-	struct ip_conntrack_tuple tuple;
+-	struct ip_conntrack_expect *master;
+-};
+-
+-
+-/* 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);
+-
+-
+-
+-/* 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 -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack_tftp.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack_tftp.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack_tftp.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack_tftp.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,13 +0,0 @@
+-#ifndef _IP_CT_TFTP
+-#define _IP_CT_TFTP
+-
+-#define TFTP_PORT 69
+-
+-struct tftphdr {
+-	u_int16_t opcode;
+-};
+-
+-#define TFTP_OPCODE_READ	1
+-#define TFTP_OPCODE_WRITE	2
+-
+-#endif /* _IP_CT_TFTP */
+diff -Nurb linux/include/linux/netfilter_ipv4/ip_conntrack_tuple.h linux.stock/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
+--- linux/include/linux/netfilter_ipv4/ip_conntrack_tuple.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_conntrack_tuple.h	2004-05-09 04:13:03.000000000 -0400
+@@ -14,7 +14,7 @@
+ union ip_conntrack_manip_proto
+ {
+ 	/* Add other protocols here. */
+-	u_int32_t all;
++	u_int16_t all;
+ 
+ 	struct {
+ 		u_int16_t port;
+@@ -25,9 +25,6 @@
+ 	struct {
+ 		u_int16_t id;
+ 	} icmp;
+-	struct {
+-		u_int32_t key;
+-	} gre;
+ };
+ 
+ /* The manipulable part of the tuple. */
+@@ -47,7 +44,7 @@
+ 		u_int32_t ip;
+ 		union {
+ 			/* Add other protocols here. */
+-			u_int64_t all;
++			u_int16_t all;
+ 
+ 			struct {
+ 				u_int16_t port;
+@@ -58,11 +55,6 @@
+ 			struct {
+ 				u_int8_t type, code;
+ 			} icmp;
+-			struct {
+-				u_int16_t protocol;
+-				u_int8_t version;
+-				u_int32_t key;
+-			} gre;
+ 		} u;
+ 
+ 		/* The protocol. */
+@@ -80,16 +72,10 @@
+ #ifdef __KERNEL__
+ 
+ #define DUMP_TUPLE(tp)						\
+-DEBUGP("tuple %p: %u %u.%u.%u.%u:%u -> %u.%u.%u.%u:%u\n",	\
++DEBUGP("tuple %p: %u %u.%u.%u.%u:%hu -> %u.%u.%u.%u:%hu\n",	\
+        (tp), (tp)->dst.protonum,				\
+-       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))
++       NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all),		\
++       NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all))
+ 
+ #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
+ 
+diff -Nurb linux/include/linux/netfilter_ipv4/ip_nat_pptp.h linux.stock/include/linux/netfilter_ipv4/ip_nat_pptp.h
+--- linux/include/linux/netfilter_ipv4/ip_nat_pptp.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_nat_pptp.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,11 +0,0 @@
+-/* 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 -Nurb linux/include/linux/netfilter_ipv4/ip_pool.h linux.stock/include/linux/netfilter_ipv4/ip_pool.h
+--- linux/include/linux/netfilter_ipv4/ip_pool.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ip_pool.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,64 +0,0 @@
+-#ifndef _IP_POOL_H
+-#define _IP_POOL_H
+-
+-/***************************************************************************/
+-/*  This program is free software; you can redistribute it and/or modify   */
+-/*  it under the terms of the GNU General Public License as published by   */
+-/*  the Free Software Foundation; either version 2 of the License, or	   */
+-/*  (at your option) any later version.					   */
+-/*									   */
+-/*  This program is distributed in the hope that it will be useful,	   */
+-/*  but WITHOUT ANY WARRANTY; without even the implied warranty of	   */
+-/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the	   */
+-/*  GNU General Public License for more details.			   */
+-/*									   */
+-/*  You should have received a copy of the GNU General Public License	   */
+-/*  along with this program; if not, write to the Free Software	       	   */
+-/*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA*/
+-/***************************************************************************/
+-
+-/* A sockopt of such quality has hardly ever been seen before on the open
+- * market!  This little beauty, hardly ever used: above 64, so it's
+- * traditionally used for firewalling, not touched (even once!) by the
+- * 2.0, 2.2 and 2.4 kernels!
+- *
+- * Comes with its own certificate of authenticity, valid anywhere in the
+- * Free world!
+- *
+- * Rusty, 19.4.2000
+- */
+-#define SO_IP_POOL 81
+-
+-typedef int ip_pool_t;			/* pool index */
+-#define IP_POOL_NONE	((ip_pool_t)-1)
+-
+-struct ip_pool_request {
+-	int op;
+-	ip_pool_t index;
+-	u_int32_t addr;
+-	u_int32_t addr2;
+-};
+-
+-/* NOTE: I deliberately break the first cut ippool utility. Nobody uses it. */
+-
+-#define IP_POOL_BAD001		0x00000010
+-
+-#define IP_POOL_FLUSH		0x00000011	/* req.index, no arguments */
+-#define IP_POOL_INIT		0x00000012	/* from addr to addr2 incl. */
+-#define IP_POOL_DESTROY		0x00000013	/* req.index, no arguments */
+-#define IP_POOL_ADD_ADDR	0x00000014	/* add addr to pool */
+-#define IP_POOL_DEL_ADDR	0x00000015	/* del addr from pool */
+-#define IP_POOL_HIGH_NR		0x00000016	/* result in req.index */
+-#define IP_POOL_LOOKUP		0x00000017	/* result in addr and addr2 */
+-#define IP_POOL_USAGE		0x00000018	/* result in addr */
+-#define IP_POOL_TEST_ADDR	0x00000019	/* result (0/1) returned */
+-
+-#ifdef __KERNEL__
+-
+-/* NOTE: ip_pool_match() and ip_pool_mod() expect ADDR to be host byte order */
+-extern int ip_pool_match(ip_pool_t pool, u_int32_t addr);
+-extern int ip_pool_mod(ip_pool_t pool, u_int32_t addr, int isdel);
+-
+-#endif
+-
+-#endif /*_IP_POOL_H*/
+diff -Nurb linux/include/linux/netfilter_ipv4/ipt_pool.h linux.stock/include/linux/netfilter_ipv4/ipt_pool.h
+--- linux/include/linux/netfilter_ipv4/ipt_pool.h	2003-07-04 04:12:27.000000000 -0400
++++ linux.stock/include/linux/netfilter_ipv4/ipt_pool.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,25 +0,0 @@
+-#ifndef _IPT_POOL_H
+-#define _IPT_POOL_H
+-
+-#include <linux/netfilter_ipv4/ip_pool.h>
+-
+-#define IPT_POOL_INV_SRC	0x00000001
+-#define IPT_POOL_INV_DST	0x00000002
+-#define IPT_POOL_DEL_SRC	0x00000004
+-#define IPT_POOL_DEL_DST	0x00000008
+-#define IPT_POOL_INV_MOD_SRC	0x00000010
+-#define IPT_POOL_INV_MOD_DST	0x00000020
+-#define IPT_POOL_MOD_SRC_ACCEPT	0x00000040
+-#define IPT_POOL_MOD_DST_ACCEPT	0x00000080
+-#define IPT_POOL_MOD_SRC_DROP	0x00000100
+-#define IPT_POOL_MOD_DST_DROP	0x00000200
+-
+-/* match info */
+-struct ipt_pool_info
+-{
+-	ip_pool_t src;
+-	ip_pool_t dst;
+-	unsigned flags;
+-};
+-
+-#endif /*_IPT_POOL_H*/
+diff -Nurb linux/net/ipv4/netfilter/Config.in linux.stock/net/ipv4/netfilter/Config.in
+--- linux/net/ipv4/netfilter/Config.in	2004-02-19 06:04:35.000000000 -0500
++++ linux.stock/net/ipv4/netfilter/Config.in	2004-05-09 04:13:03.000000000 -0400
+@@ -7,12 +7,7 @@
+ tristate 'Connection tracking (required for masq/NAT)' CONFIG_IP_NF_CONNTRACK
+ if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
+   dep_tristate '  FTP protocol support' CONFIG_IP_NF_FTP $CONFIG_IP_NF_CONNTRACK
+-  dep_tristate '  TFTP protocol support' CONFIG_IP_NF_TFTP $CONFIG_IP_NF_CONNTRACK
+-  dep_tristate '  H.323 (netmeeting) support' CONFIG_IP_NF_H323 $CONFIG_IP_NF_CONNTRACK
+   dep_tristate '  IRC protocol support' CONFIG_IP_NF_IRC $CONFIG_IP_NF_CONNTRACK
+-  dep_tristate '  MMS protocol support' CONFIG_IP_NF_MMS $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
+@@ -22,19 +17,11 @@
+ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ]; then
+ # The simple matches.
+   dep_tristate '  limit match support' CONFIG_IP_NF_MATCH_LIMIT $CONFIG_IP_NF_IPTABLES
+-
+-  dep_tristate '  IP address pool support' CONFIG_IP_NF_POOL $CONFIG_IP_NF_IPTABLES
+-  if [ "$CONFIG_IP_NF_POOL" = "y" -o "$CONFIG_IP_NF_POOL" = "m" ]; then
+-    bool '    enable statistics on pool usage' CONFIG_IP_POOL_STATISTICS n
+-  fi
+-
+   dep_tristate '  MAC address match support' CONFIG_IP_NF_MATCH_MAC $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  Packet type match support' CONFIG_IP_NF_MATCH_PKTTYPE $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  netfilter MARK match support' CONFIG_IP_NF_MATCH_MARK $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  Multiple port match support' CONFIG_IP_NF_MATCH_MULTIPORT $CONFIG_IP_NF_IPTABLES
+-  dep_tristate '  Multiple port with ranges match support' CONFIG_IP_NF_MATCH_MPORT $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  TOS match support' CONFIG_IP_NF_MATCH_TOS $CONFIG_IP_NF_IPTABLES
+-  dep_tristate '  TIME match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_TIME $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  ECN match support' CONFIG_IP_NF_MATCH_ECN $CONFIG_IP_NF_IPTABLES
+  
+   dep_tristate '  DSCP match support' CONFIG_IP_NF_MATCH_DSCP $CONFIG_IP_NF_IPTABLES
+@@ -52,7 +39,6 @@
+   fi
+   if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+     dep_tristate '  Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES
+-    dep_tristate '  Webstr match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_WEBSTR $CONFIG_IP_NF_IPTABLES
+     dep_tristate '  Owner match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_OWNER $CONFIG_IP_NF_IPTABLES
+   fi
+ # The targets
+@@ -70,29 +56,6 @@
+       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
+-      dep_tristate '    Automatic port forwarding (autofw) target support' CONFIG_IP_NF_AUTOFW $CONFIG_IP_NF_NAT
+-      dep_tristate '    TRIGGER target support (port-trigger)' CONFIG_IP_NF_TARGET_TRIGGER $CONFIG_IP_NF_NAT
+-      if [ "$CONFIG_IP_NF_H323" = "m" ]; then
+-       define_tristate CONFIG_IP_NF_NAT_H323 m
+-      else
+-        if [ "$CONFIG_IP_NF_H323" = "y" ]; then
+-          define_tristate CONFIG_IP_NF_NAT_H323 $CONFIG_IP_NF_NAT
+-        fi
+-      fi
+-      if [ "$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 $CONFIG_IP_NF_NAT
+-        fi
+-      fi
+       bool '    NAT of local connections (READ HELP)' CONFIG_IP_NF_NAT_LOCAL
+       if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+         dep_tristate '    Basic SNMP-ALG support (EXPERIMENTAL)' CONFIG_IP_NF_NAT_SNMP_BASIC $CONFIG_IP_NF_NAT
+@@ -104,13 +67,6 @@
+           define_tristate CONFIG_IP_NF_NAT_IRC $CONFIG_IP_NF_NAT
+         fi
+       fi
+-      if [ "$CONFIG_IP_NF_MMS" = "m" ]; then
+-        define_tristate CONFIG_IP_NF_NAT_MMS m
+-      else
+-        if [ "$CONFIG_IP_NF_MMS" = "y" ]; then
+-          define_tristate CONFIG_IP_NF_NAT_MMS $CONFIG_IP_NF_NAT
+-        fi
+-      fi
+       # If they want FTP, set to $CONFIG_IP_NF_NAT (m or y), 
+       # or $CONFIG_IP_NF_FTP (m or y), whichever is weaker.  Argh.
+       if [ "$CONFIG_IP_NF_FTP" = "m" ]; then
+@@ -120,13 +76,6 @@
+           define_tristate CONFIG_IP_NF_NAT_FTP $CONFIG_IP_NF_NAT
+         fi
+       fi
+-      if [ "$CONFIG_IP_NF_TFTP" = "m" ]; then
+-        define_tristate CONFIG_IP_NF_NAT_TFTP m
+-      else
+-        if [ "$CONFIG_IP_NF_TFTP" = "y" ]; then
+-          define_tristate CONFIG_IP_NF_NAT_TFTP $CONFIG_IP_NF_NAT
+-        fi
+-      fi
+     fi
+   fi
+ 
+diff -Nurb linux/net/ipv4/netfilter/Makefile linux.stock/net/ipv4/netfilter/Makefile
+--- linux/net/ipv4/netfilter/Makefile	2004-02-19 06:04:35.000000000 -0500
++++ linux.stock/net/ipv4/netfilter/Makefile	2004-05-09 04:13:03.000000000 -0400
+@@ -31,48 +31,20 @@
+ # connection tracking
+ obj-$(CONFIG_IP_NF_CONNTRACK) += ip_conntrack.o
+  
+-# H.323 support
+-obj-$(CONFIG_IP_NF_H323) += ip_conntrack_h323.o
+-obj-$(CONFIG_IP_NF_NAT_H323) += ip_nat_h323.o
+-ifdef CONFIG_IP_NF_NAT_H323
+-	export-objs += ip_conntrack_h323.o
+-endif
+-
+-
+-# connection tracking protocol helpers
+-obj-$(CONFIG_IP_NF_CT_PROTO_GRE) += ip_conntrack_proto_gre.o
+-ifdef CONFIG_IP_NF_CT_PROTO_GRE
+-	export-objs += ip_conntrack_proto_gre.o
+-endif
+-
+-# NAT protocol helpers
+-obj-$(CONFIG_IP_NF_NAT_PROTO_GRE) += ip_nat_proto_gre.o
+-
+ # connection tracking helpers
+-obj-$(CONFIG_IP_NF_MMS) += ip_conntrack_mms.o
+-ifdef CONFIG_IP_NF_NAT_MMS
+-	export-objs += ip_conntrack_mms.o
+-endif
+-obj-$(CONFIG_IP_NF_PPTP) += ip_conntrack_pptp.o
+-ifdef CONFIG_IP_NF_NAT_PPTP
+-	export-objs += ip_conntrack_pptp.o
+-endif
+-obj-$(CONFIG_IP_NF_TFTP) += ip_conntrack_tftp.o
+ obj-$(CONFIG_IP_NF_FTP) += ip_conntrack_ftp.o
+ ifdef CONFIG_IP_NF_NAT_FTP
+ 	export-objs += ip_conntrack_ftp.o
+ endif
++
+ obj-$(CONFIG_IP_NF_IRC) += ip_conntrack_irc.o
+ ifdef CONFIG_IP_NF_NAT_IRC
+ 	export-objs += ip_conntrack_irc.o
+ endif
+ 
+ # NAT helpers 
+-obj-$(CONFIG_IP_NF_NAT_PPTP) += ip_nat_pptp.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_MMS) += ip_nat_mms.o
+ 
+ # generic IP tables 
+ obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
+@@ -86,19 +58,12 @@
+ obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
+ obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
+ obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
+-obj-$(CONFIG_IP_NF_POOL) += ipt_pool.o ip_pool.o
+ obj-$(CONFIG_IP_NF_MATCH_MAC) += ipt_mac.o
+ 
+ obj-$(CONFIG_IP_NF_MATCH_PKTTYPE) += ipt_pkttype.o
+ obj-$(CONFIG_IP_NF_MATCH_MULTIPORT) += ipt_multiport.o
+-
+-obj-$(CONFIG_IP_NF_MATCH_MPORT) += ipt_mport.o
+-
+ obj-$(CONFIG_IP_NF_MATCH_OWNER) += ipt_owner.o
+ obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o
+-
+-obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
+-
+ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
+ obj-$(CONFIG_IP_NF_MATCH_DSCP) += ipt_dscp.o
+ obj-$(CONFIG_IP_NF_MATCH_AH_ESP) += ipt_ah.o ipt_esp.o
+@@ -109,7 +74,6 @@
+ obj-$(CONFIG_IP_NF_MATCH_STATE) += ipt_state.o
+ obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o
+ obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
+-obj-$(CONFIG_IP_NF_MATCH_WEBSTR) += ipt_webstr.o
+ obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
+ 
+ # targets
+@@ -125,8 +89,6 @@
+ obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
+ obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
+ obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS.o
+-obj-$(CONFIG_IP_NF_AUTOFW) += ip_autofw.o
+-obj-$(CONFIG_IP_NF_TARGET_TRIGGER) += ipt_TRIGGER.o
+ 
+ # generic ARP tables
+ obj-$(CONFIG_IP_NF_ARPTABLES) += arp_tables.o
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_core.c linux.stock/net/ipv4/netfilter/ip_conntrack_core.c
+--- linux/net/ipv4/netfilter/ip_conntrack_core.c	2003-08-12 07:33:45.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_core.c	2004-05-09 04:13:03.000000000 -0400
+@@ -47,7 +47,11 @@
+ 
+ #define IP_CONNTRACK_VERSION	"2.1"
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ DECLARE_RWLOCK(ip_conntrack_lock);
+ DECLARE_RWLOCK(ip_conntrack_expect_tuple_lock);
+@@ -62,29 +66,6 @@
+ struct list_head *ip_conntrack_hash;
+ static kmem_cache_t *ip_conntrack_cachep;
+ 
+-#define SECS  * HZ
+-#define MINS  * 60 SECS
+-#define HOURS * 60 MINS
+-#define DAYS  * 24 HOURS
+-
+-int sysctl_ip_conntrack_tcp_timeouts[10] = {
+-       30 MINS,        /*      TCP_CONNTRACK_NONE,             */
+-       5 DAYS,         /*      TCP_CONNTRACK_ESTABLISHED,      */
+-       2 MINS,         /*      TCP_CONNTRACK_SYN_SENT,         */
+-       60 SECS,        /*      TCP_CONNTRACK_SYN_RECV,         */
+-       2 MINS,         /*      TCP_CONNTRACK_FIN_WAIT,         */
+-       2 MINS,         /*      TCP_CONNTRACK_TIME_WAIT,        */
+-       10 SECS,        /*      TCP_CONNTRACK_CLOSE,            */
+-       60 SECS,        /*      TCP_CONNTRACK_CLOSE_WAIT,       */
+-       30 SECS,        /*      TCP_CONNTRACK_LAST_ACK,         */
+-       2 MINS,         /*      TCP_CONNTRACK_LISTEN,           */
+-};
+-
+-int sysctl_ip_conntrack_udp_timeouts[2] = { 
+-       30 SECS,        /*      UNREPLIED                       */ 
+-       180 SECS        /*      ASSURED                         */
+-};
+-
+ extern struct ip_conntrack_protocol ip_conntrack_generic_protocol;
+ 
+ static inline int proto_cmpfn(const struct ip_conntrack_protocol *curr,
+@@ -129,6 +110,9 @@
+ static inline u_int32_t
+ hash_conntrack(const struct ip_conntrack_tuple *tuple)
+ {
++#if 0
++	dump_tuple(tuple);
++#endif
+ 	/* ntohl because more differences in low bits. */
+ 	/* To ensure that halves of the same connection don't hash
+ 	   clash, we add the source per-proto again. */
+@@ -160,8 +144,6 @@
+ 	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);
+@@ -177,8 +159,6 @@
+ 	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);
+ }
+ 
+@@ -196,8 +176,8 @@
+ static void
+ destroy_expect(struct ip_conntrack_expect *exp)
+ {
+-	DEBUGP("destroy_expect(%p) use=%d\n", exp, atomic_read(&exp->use));
+-	IP_NF_ASSERT(atomic_read(&exp->use));
++	DEBUGP("destroy_expect(%p) use=%d\n", exp, atomic_read(exp->use));
++	IP_NF_ASSERT(atomic_read(exp->use));
+ 	IP_NF_ASSERT(!timer_pending(&exp->timeout));
+ 
+ 	kfree(exp);
+@@ -267,11 +247,11 @@
+ static void unexpect_related(struct ip_conntrack_expect *expect)
+ {
+ 	IP_NF_ASSERT(expect->expectant);
++	IP_NF_ASSERT(expect->expectant->helper);
+ 	/* if we are supposed to have a timer, but we can't delete
+ 	 * it: race condition.  __unexpect_related will
+ 	 * be calledd by timeout function */
+-	if (expect->expectant->helper
+-	    && expect->expectant->helper->timeout
++	if (expect->expectant->helper->timeout
+ 	    && !del_timer(&expect->timeout))
+ 		return;
+ 
+@@ -580,6 +560,7 @@
+ 	if (!h) {
+ 		/* Locally generated ICMPs will match inverted if they
+ 		   haven't been SNAT'ed yet */
++		/* FIXME: NAT code has to handle half-done double NAT --RR */
+ 		if (hooknum == NF_IP_LOCAL_OUT)
+ 			h = ip_conntrack_find_get(&origtuple, NULL);
+ 
+@@ -725,7 +706,6 @@
+ 
+ 	/* If the expectation is dying, then this is a looser. */
+ 	if (expected
+-	    && expected->expectant->helper
+ 	    && expected->expectant->helper->timeout
+ 	    && ! del_timer(&expected->timeout))
+ 		expected = NULL;
+@@ -744,7 +724,6 @@
+ 		conntrack->master = expected;
+ 		expected->sibling = conntrack;
+ 		LIST_DELETE(&ip_conntrack_expect_list, expected);
+-		INIT_LIST_HEAD(&expected->list);
+ 		expected->expectant->expecting--;
+ 		nf_conntrack_get(&master_ct(conntrack)->infos[0]);
+ 	}
+@@ -821,9 +800,23 @@
+ 	int set_reply;
+ 	int ret;
+ 
++	/* FIXME: Do this right please. --RR */
+ 	(*pskb)->nfcache |= NFC_UNKNOWN;
+ 
+ /* Doesn't cover locally-generated broadcast, so not worth it. */
++#if 0
++	/* Ignore broadcast: no `connection'. */
++	if ((*pskb)->pkt_type == PACKET_BROADCAST) {
++		printk("Broadcast packet!\n");
++		return NF_ACCEPT;
++	} else if (((*pskb)->nh.iph->daddr & htonl(0x000000FF)) 
++		   == htonl(0x000000FF)) {
++		printk("Should bcast: %u.%u.%u.%u->%u.%u.%u.%u (sk=%p, ptype=%u)\n",
++		       NIPQUAD((*pskb)->nh.iph->saddr),
++		       NIPQUAD((*pskb)->nh.iph->daddr),
++		       (*pskb)->sk, (*pskb)->pkt_type);
++	}
++#endif
+ 
+ 	/* Previously seen (loopback)?  Ignore.  Do this before
+            fragment check. */
+@@ -943,8 +936,8 @@
+ 	 * so there is no need to use the tuple lock too */
+ 
+ 	DEBUGP("ip_conntrack_expect_related %p\n", related_to);
+-	DEBUGP("tuple: "); DUMP_TUPLE_RAW(&expect->tuple);
+-	DEBUGP("mask:  "); DUMP_TUPLE_RAW(&expect->mask);
++	DEBUGP("tuple: "); DUMP_TUPLE(&expect->tuple);
++	DEBUGP("mask:  "); DUMP_TUPLE(&expect->mask);
+ 
+ 	old = LIST_FIND(&ip_conntrack_expect_list, resent_expect,
+ 		        struct ip_conntrack_expect *, &expect->tuple, 
+@@ -954,8 +947,7 @@
+ 		   pointing into the payload - otherwise we should have to copy 
+ 		   the data filled out by the helper over the old one */
+ 		DEBUGP("expect_related: resent packet\n");
+-		if (related_to->helper &&
+-		    related_to->helper->timeout) {
++		if (related_to->helper->timeout) {
+ 			if (!del_timer(&old->timeout)) {
+ 				/* expectation is dying. Fall through */
+ 				old = NULL;
+@@ -970,32 +962,26 @@
+ 			WRITE_UNLOCK(&ip_conntrack_lock);
+ 			return -EEXIST;
+ 		}
+-	} else if (related_to->helper &&
+-		   related_to->helper->max_expected && 
++	} else if (related_to->helper->max_expected && 
+ 		   related_to->expecting >= related_to->helper->max_expected) {
+ 		struct list_head *cur_item;
+ 		/* old == NULL */
+-		if (!(related_to->helper->flags & 
+-		      IP_CT_HELPER_F_REUSE_EXPECT)) {
+-			WRITE_UNLOCK(&ip_conntrack_lock);
+  		    	if (net_ratelimit())
+  			    	printk(KERN_WARNING
+ 				       "ip_conntrack: max number of expected "
+ 				       "connections %i of %s reached for "
+-				       "%u.%u.%u.%u->%u.%u.%u.%u\n",
++			       "%u.%u.%u.%u->%u.%u.%u.%u%s\n",
+ 				       related_to->helper->max_expected,
+ 				       related_to->helper->name,
+  		    	       	       NIPQUAD(related_to->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip),
+- 		    	       	       NIPQUAD(related_to->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip));
++		    	       NIPQUAD(related_to->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip),
++		    	       related_to->helper->flags & IP_CT_HELPER_F_REUSE_EXPECT ?
++		    	       ", reusing" : "");
++		if (!(related_to->helper->flags & 
++		      IP_CT_HELPER_F_REUSE_EXPECT)) {
++			WRITE_UNLOCK(&ip_conntrack_lock);
+ 			return -EPERM;
+ 		}
+-		DEBUGP("ip_conntrack: max number of expected "
+-		       "connections %i of %s reached for "
+-		       "%u.%u.%u.%u->%u.%u.%u.%u, reusing\n",
+- 		       related_to->helper->max_expected,
+-		       related_to->helper->name,
+-		       NIPQUAD(related_to->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip),
+-		       NIPQUAD(related_to->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip));
+  
+ 		/* choose the the oldest expectation to evict */
+ 		list_for_each(cur_item, &related_to->sibling_list) { 
+@@ -1055,8 +1041,7 @@
+ 	/* add to global list of expectations */
+ 	list_prepend(&ip_conntrack_expect_list, &new->list);
+ 	/* add and start timer if required */
+-	if (related_to->helper &&
+-	    related_to->helper->timeout) {
++	if (related_to->helper->timeout) {
+ 		init_timer(&new->timeout);
+ 		new->timeout.data = (unsigned long)new;
+ 		new->timeout.function = expectation_timed_out;
+@@ -1079,10 +1064,11 @@
+ 
+ 	MUST_BE_READ_LOCKED(&ip_conntrack_lock);
+ 	WRITE_LOCK(&ip_conntrack_expect_tuple_lock);
++
+ 	DEBUGP("change_expect:\n");
+-	DEBUGP("exp tuple: "); DUMP_TUPLE_RAW(&expect->tuple);
+-	DEBUGP("exp mask:  "); DUMP_TUPLE_RAW(&expect->mask);
+-	DEBUGP("newtuple:  "); DUMP_TUPLE_RAW(newtuple);
++	DEBUGP("exp tuple: "); DUMP_TUPLE(&expect->tuple);
++	DEBUGP("exp mask:  "); DUMP_TUPLE(&expect->mask);
++	DEBUGP("newtuple:  "); DUMP_TUPLE(newtuple);
+ 	if (expect->ct_tuple.dst.protonum == 0) {
+ 		/* Never seen before */
+ 		DEBUGP("change expect: never seen before\n");
+@@ -1360,8 +1346,6 @@
+     0, NULL };
+ 
+ #define NET_IP_CONNTRACK_MAX 2089
+-#define NET_IP_CONNTRACK_TCP_TIMEOUTS  2090
+-#define NET_IP_CONNTRACK_UDP_TIMEOUTS  2091
+ #define NET_IP_CONNTRACK_MAX_NAME "ip_conntrack_max"
+ 
+ #ifdef CONFIG_SYSCTL
+@@ -1370,14 +1354,6 @@
+ static ctl_table ip_conntrack_table[] = {
+ 	{ NET_IP_CONNTRACK_MAX, NET_IP_CONNTRACK_MAX_NAME, &ip_conntrack_max,
+ 	  sizeof(ip_conntrack_max), 0644,  NULL, proc_dointvec },
+-	{ NET_IP_CONNTRACK_TCP_TIMEOUTS, "ip_conntrack_tcp_timeouts",
+-          &sysctl_ip_conntrack_tcp_timeouts,
+-          sizeof(sysctl_ip_conntrack_tcp_timeouts),
+-          0644, NULL, &proc_dointvec_jiffies, &sysctl_jiffies },
+-	{ NET_IP_CONNTRACK_UDP_TIMEOUTS, "ip_conntrack_udp_timeouts",
+-          &sysctl_ip_conntrack_udp_timeouts,
+-          sizeof(sysctl_ip_conntrack_udp_timeouts),
+-          0644, NULL, &proc_dointvec_jiffies, &sysctl_jiffies },
+  	{ 0 }
+ };
+ 
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_ftp.c linux.stock/net/ipv4/netfilter/ip_conntrack_ftp.c
+--- linux/net/ipv4/netfilter/ip_conntrack_ftp.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_ftp.c	2004-05-09 04:13:03.000000000 -0400
+@@ -24,7 +24,11 @@
+ static int loose = 0;
+ MODULE_PARM(loose, "i");
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ static int try_rfc959(const char *, size_t, u_int32_t [], char);
+ static int try_eprt(const char *, size_t, u_int32_t [], char);
+@@ -191,6 +195,16 @@
+ 	}
+ 
+ 	if (strnicmp(data, pattern, plen) != 0) {
++#if 0
++		size_t i;
++
++		DEBUGP("ftp: string mismatch\n");
++		for (i = 0; i < plen; i++) {
++			DEBUGFTP("ftp:char %u `%c'(%u) vs `%c'(%u)\n",
++				 i, data[i], data[i],
++				 pattern[i], pattern[i]);
++		}
++#endif
+ 		return 0;
+ 	}
+ 
+@@ -214,6 +228,7 @@
+ 	return 1;
+ }
+ 
++/* FIXME: This should be in userspace.  Later. */
+ static int help(const struct iphdr *iph, size_t len,
+ 		struct ip_conntrack *ct,
+ 		enum ip_conntrack_info ctinfo)
+@@ -249,6 +264,7 @@
+ 	}
+ 
+ 	/* Checksum invalid?  Ignore. */
++	/* FIXME: Source route IP option packets --RR */
+ 	if (tcp_v4_check(tcph, tcplen, iph->saddr, iph->daddr,
+ 			 csum_partial((char *)tcph, tcplen, 0))) {
+ 		DEBUGP("ftp_help: bad csum: %p %u %u.%u.%u.%u %u.%u.%u.%u\n",
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_h323.c linux.stock/net/ipv4/netfilter/ip_conntrack_h323.c
+--- linux/net/ipv4/netfilter/ip_conntrack_h323.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_h323.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,302 +0,0 @@
+-/* 
+- * H.323 'brute force' extension for H.323 connection tracking. 
+- * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+- *
+- * Based on ip_masq_h323.c for 2.2 kernels from CoRiTel, Sofia project.
+- * (http://www.coritel.it/projects/sofia/nat/)
+- * Uses Sampsa Ranta's excellent idea on using expectfn to 'bind'
+- * the unregistered helpers to the conntrack entries.
+- */
+-
+-
+-#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.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_core.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_h323.h>
+-
+-MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
+-MODULE_DESCRIPTION("H.323 'brute force' connection tracking module");
+-MODULE_LICENSE("GPL");
+-
+-DECLARE_LOCK(ip_h323_lock);
+-struct module *ip_conntrack_h323 = THIS_MODULE;
+-
+-#define DEBUGP(format, args...)
+-
+-static int h245_help(const struct iphdr *iph, size_t len,
+-		     struct ip_conntrack *ct,
+-		     enum ip_conntrack_info ctinfo)
+-{
+-	struct tcphdr *tcph = (void *)iph + iph->ihl * 4;
+-	unsigned char *data = (unsigned char *) tcph + tcph->doff * 4;
+-	unsigned char *data_limit;
+-	u_int32_t tcplen = len - iph->ihl * 4;
+-	u_int32_t datalen = tcplen - tcph->doff * 4;
+-	int dir = CTINFO2DIR(ctinfo);
+-	struct ip_ct_h225_master *info = &ct->help.ct_h225_info;
+-	struct ip_conntrack_expect expect, *exp = &expect;
+-	struct ip_ct_h225_expect *exp_info = &exp->help.exp_h225_info;
+-	u_int16_t data_port;
+-	u_int32_t data_ip;
+-	unsigned int i;
+-
+-	DEBUGP("ct_h245_help: help entered %u.%u.%u.%u:%u->%u.%u.%u.%u:%u\n",
+-		NIPQUAD(iph->saddr), ntohs(tcph->source),
+-		NIPQUAD(iph->daddr), ntohs(tcph->dest));
+-
+-	/* Can't track connections formed before we registered */
+-	if (!info)
+-		return NF_ACCEPT;
+-		
+-	/* Until there's been traffic both ways, don't look in packets. */
+-	if (ctinfo != IP_CT_ESTABLISHED
+-	    && ctinfo != IP_CT_ESTABLISHED + IP_CT_IS_REPLY) {
+-		DEBUGP("ct_h245_help: Conntrackinfo = %u\n", ctinfo);
+-		return NF_ACCEPT;
+-	}
+-
+-	/* Not whole TCP header or too short packet? */
+-	if (tcplen < sizeof(struct tcphdr) || tcplen < tcph->doff * 4 + 5) {
+-		DEBUGP("ct_h245_help: tcplen = %u\n", (unsigned)tcplen);
+-		return NF_ACCEPT;
+-	}
+-
+-	/* Checksum invalid?  Ignore. */
+-	if (tcp_v4_check(tcph, tcplen, iph->saddr, iph->daddr,
+-			      csum_partial((char *)tcph, tcplen, 0))) {
+-		DEBUGP("ct_h245_help: bad csum: %p %u %u.%u.%u.%u %u.%u.%u.%u\n",
+-		       tcph, tcplen, NIPQUAD(iph->saddr),
+-		       NIPQUAD(iph->daddr));
+-		return NF_ACCEPT;
+-	}
+-
+-	data_limit = (unsigned char *) data + datalen;
+-	/* bytes: 0123   45
+-	          ipadrr port */
+-	for (i = 0; data < (data_limit - 5); data++, i++) {
+-		memcpy(&data_ip, data, sizeof(u_int32_t));
+-		if (data_ip == iph->saddr) {
+-			memcpy(&data_port, data + 4, sizeof(u_int16_t));
+-			memset(&expect, 0, sizeof(expect));
+-			/* update the H.225 info */
+-			DEBUGP("ct_h245_help: new RTCP/RTP requested %u.%u.%u.%u:->%u.%u.%u.%u:%u\n",
+-				NIPQUAD(ct->tuplehash[!dir].tuple.src.ip),
+-				NIPQUAD(iph->saddr), ntohs(data_port));
+-			LOCK_BH(&ip_h323_lock);
+-			info->is_h225 = H225_PORT + 1;
+-			exp_info->port = data_port;
+-			exp_info->dir = dir;
+-			exp_info->offset = i;
+-
+-			exp->seq = ntohl(tcph->seq) + i;
+-		    
+-			exp->tuple = ((struct ip_conntrack_tuple)
+-				{ { ct->tuplehash[!dir].tuple.src.ip,
+-				    { 0 } },
+-				  { data_ip,
+-				    { data_port },
+-				    IPPROTO_UDP }});
+-			exp->mask = ((struct ip_conntrack_tuple)
+-				{ { 0xFFFFFFFF, { 0 } },
+-				  { 0xFFFFFFFF, { 0xFFFF }, 0xFFFF }});
+-	
+-			exp->expectfn = NULL;
+-			
+-			/* Ignore failure; should only happen with NAT */
+-			ip_conntrack_expect_related(ct, exp);
+-
+-			UNLOCK_BH(&ip_h323_lock);
+-		}
+-	}
+-
+-	return NF_ACCEPT;
+-
+-}
+-
+-/* H.245 helper is not registered! */
+-static struct ip_conntrack_helper h245 = 
+-	{ { NULL, NULL },
+-          "H.245",				/* name */
+-          IP_CT_HELPER_F_REUSE_EXPECT,		/* flags */
+-          NULL,					/* module */
+-          8,					/* max_ expected */
+-          240,					/* timeout */
+-          { { 0, { 0 } },			/* tuple */
+-            { 0, { 0 }, IPPROTO_TCP } },
+-          { { 0, { 0xFFFF } },			/* mask */
+-            { 0, { 0 }, 0xFFFF } },
+-          h245_help				/* helper */
+-	};
+-
+-static int h225_expect(struct ip_conntrack *ct)
+-{
+-	WRITE_LOCK(&ip_conntrack_lock);
+-	ct->helper = &h245;
+-	DEBUGP("h225_expect: helper for %p added\n", ct);
+-	WRITE_UNLOCK(&ip_conntrack_lock);
+-	
+-	return NF_ACCEPT;	/* unused */
+-}
+-
+-static int h225_help(const struct iphdr *iph, size_t len,
+-		     struct ip_conntrack *ct,
+-		     enum ip_conntrack_info ctinfo)
+-{
+-	struct tcphdr *tcph = (void *)iph + iph->ihl * 4;
+-	unsigned char *data = (unsigned char *) tcph + tcph->doff * 4;
+-	unsigned char *data_limit;
+-	u_int32_t tcplen = len - iph->ihl * 4;
+-	u_int32_t datalen = tcplen - tcph->doff * 4;
+-	int dir = CTINFO2DIR(ctinfo);
+-	struct ip_ct_h225_master *info = &ct->help.ct_h225_info;
+-	struct ip_conntrack_expect expect, *exp = &expect;
+-	struct ip_ct_h225_expect *exp_info = &exp->help.exp_h225_info;
+-	u_int16_t data_port;
+-	u_int32_t data_ip;
+-	unsigned int i;
+-	
+-	DEBUGP("ct_h225_help: help entered %u.%u.%u.%u:%u->%u.%u.%u.%u:%u\n",
+-		NIPQUAD(iph->saddr), ntohs(tcph->source),
+-		NIPQUAD(iph->daddr), ntohs(tcph->dest));
+-
+-	/* Can't track connections formed before we registered */
+-	if (!info)
+-		return NF_ACCEPT;
+-
+-	/* Until there's been traffic both ways, don't look in packets. */
+-	if (ctinfo != IP_CT_ESTABLISHED
+-	    && ctinfo != IP_CT_ESTABLISHED + IP_CT_IS_REPLY) {
+-		DEBUGP("ct_h225_help: Conntrackinfo = %u\n", ctinfo);
+-		return NF_ACCEPT;
+-	}
+-
+-	/* Not whole TCP header or too short packet? */
+-	if (tcplen < sizeof(struct tcphdr) || tcplen < tcph->doff * 4 + 5) {
+-		DEBUGP("ct_h225_help: tcplen = %u\n", (unsigned)tcplen);
+-		return NF_ACCEPT;
+-	}
+-
+-	/* Checksum invalid?  Ignore. */
+-	if (tcp_v4_check(tcph, tcplen, iph->saddr, iph->daddr,
+-			      csum_partial((char *)tcph, tcplen, 0))) {
+-		DEBUGP("ct_h225_help: bad csum: %p %u %u.%u.%u.%u %u.%u.%u.%u\n",
+-		       tcph, tcplen, NIPQUAD(iph->saddr),
+-		       NIPQUAD(iph->daddr));
+-		return NF_ACCEPT;
+-	}
+-	
+-	data_limit = (unsigned char *) data + datalen;
+-	/* bytes: 0123   45
+-	          ipadrr port */
+-	for (i = 0; data < (data_limit - 5); data++, i++) {
+-		memcpy(&data_ip, data, sizeof(u_int32_t));
+-		if (data_ip == iph->saddr) {
+-			memcpy(&data_port, data + 4, sizeof(u_int16_t));
+-			if (data_port == tcph->source) {
+-				/* Signal address */
+-				DEBUGP("ct_h225_help: sourceCallSignalAddress from %u.%u.%u.%u\n",
+-					NIPQUAD(iph->saddr));
+-				/* Update the H.225 info so that NAT can mangle the address/port
+-				   even when we have no expected connection! */
+-#ifdef CONFIG_IP_NF_NAT_NEEDED
+-				LOCK_BH(&ip_h323_lock);
+-				info->dir = dir;
+-				info->seq[IP_CT_DIR_ORIGINAL] = ntohl(tcph->seq) + i;
+-				info->offset[IP_CT_DIR_ORIGINAL] = i;
+-				UNLOCK_BH(&ip_h323_lock);
+-#endif
+-			} else {
+-				memset(&expect, 0, sizeof(expect));
+-
+-				/* update the H.225 info */
+-				LOCK_BH(&ip_h323_lock);
+-				info->is_h225 = H225_PORT;
+-				exp_info->port = data_port;
+-				exp_info->dir = dir;
+-				exp_info->offset = i;
+-
+-				exp->seq = ntohl(tcph->seq) + i;
+-
+-				exp->tuple = ((struct ip_conntrack_tuple)
+-					{ { ct->tuplehash[!dir].tuple.src.ip,
+-					    { 0 } },
+-					  { data_ip,
+-					    { data_port },
+-					    IPPROTO_TCP }});
+-				exp->mask = ((struct ip_conntrack_tuple)
+-					{ { 0xFFFFFFFF, { 0 } },
+-					  { 0xFFFFFFFF, { 0xFFFF }, 0xFFFF }});
+-	
+-				exp->expectfn = h225_expect;
+-				
+-				/* Ignore failure */
+-				ip_conntrack_expect_related(ct, exp);
+-
+-				DEBUGP("ct_h225_help: new H.245 requested %u.%u.%u.%u->%u.%u.%u.%u:%u\n",
+-					NIPQUAD(ct->tuplehash[!dir].tuple.src.ip),
+-					NIPQUAD(iph->saddr), ntohs(data_port));
+-
+-				UNLOCK_BH(&ip_h323_lock);
+-                	}  
+-#ifdef CONFIG_IP_NF_NAT_NEEDED
+-		} else if (data_ip == iph->daddr) {
+-			memcpy(&data_port, data + 4, sizeof(u_int16_t));
+-			if (data_port == tcph->dest) {
+-				/* Signal address */
+-				DEBUGP("ct_h225_help: destCallSignalAddress %u.%u.%u.%u\n",
+-					NIPQUAD(iph->daddr));
+-				/* Update the H.225 info so that NAT can mangle the address/port
+-				   even when we have no expected connection! */
+-				LOCK_BH(&ip_h323_lock);
+-				info->dir = dir;
+-				info->seq[IP_CT_DIR_REPLY] = ntohl(tcph->seq) + i;
+-				info->offset[IP_CT_DIR_REPLY] = i;
+-				UNLOCK_BH(&ip_h323_lock);
+-			}
+-#endif
+-		}
+-	}
+-
+-	return NF_ACCEPT;
+-
+-}
+-
+-static struct ip_conntrack_helper h225 = 
+-	{ { NULL, NULL },
+-	  "H.225",					/* name */
+-	  IP_CT_HELPER_F_REUSE_EXPECT,			/* flags */
+-	  THIS_MODULE,					/* module */
+-	  2,						/* max_expected */
+-	  240,						/* timeout */
+-	  { { 0, { __constant_htons(H225_PORT) } },	/* tuple */
+-	    { 0, { 0 }, IPPROTO_TCP } },
+-	  { { 0, { 0xFFFF } },				/* mask */
+-	    { 0, { 0 }, 0xFFFF } },
+-	  h225_help					/* helper */
+-	};
+-
+-static int __init init(void)
+-{
+-	return ip_conntrack_helper_register(&h225);
+-}
+-
+-static void __exit fini(void)
+-{
+-	/* Unregister H.225 helper */	
+-	ip_conntrack_helper_unregister(&h225);
+-}
+-
+-#ifdef CONFIG_IP_NF_NAT_NEEDED
+-EXPORT_SYMBOL(ip_h323_lock);
+-#endif
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_mms.c linux.stock/net/ipv4/netfilter/ip_conntrack_mms.c
+--- linux/net/ipv4/netfilter/ip_conntrack_mms.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_mms.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,292 +0,0 @@
+-/* MMS extension for IP connection tracking
+- * (C) 2002 by Filip Sneppe <filip.sneppe@cronos.be>
+- * based on ip_conntrack_ftp.c and ip_conntrack_irc.c
+- *
+- * ip_conntrack_mms.c v0.3 2002-09-22
+- *
+- *      This program is free software; you can redistribute it and/or
+- *      modify it under the terms of the GNU General Public License
+- *      as published by the Free Software Foundation; either version
+- *      2 of the License, or (at your option) any later version.
+- *
+- *      Module load syntax:
+- *      insmod ip_conntrack_mms.o ports=port1,port2,...port<MAX_PORTS>
+- *
+- *      Please give the ports of all MMS servers You wish to connect to.
+- *      If you don't specify ports, the default will be TCP port 1755.
+- *
+- *      More info on MMS protocol, firewalls and NAT:
+- *      http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/MMSFirewall.asp
+- *      http://www.microsoft.com/windows/windowsmedia/serve/firewall.asp
+- *
+- *      The SDP project people are reverse-engineering MMS:
+- *      http://get.to/sdp
+- */
+-
+-#include <linux/config.h>
+-#include <linux/module.h>
+-#include <linux/netfilter.h>
+-#include <linux/ip.h>
+-#include <linux/ctype.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_mms.h>
+-
+-DECLARE_LOCK(ip_mms_lock);
+-struct module *ip_conntrack_mms = THIS_MODULE;
+-
+-#define MAX_PORTS 8
+-static int ports[MAX_PORTS];
+-static int ports_c;
+-#ifdef MODULE_PARM
+-MODULE_PARM(ports, "1-" __MODULE_STRING(MAX_PORTS) "i");
+-#endif
+-
+-#define DEBUGP(format, args...)
+-
+-#ifdef CONFIG_IP_NF_NAT_NEEDED
+-EXPORT_SYMBOL(ip_mms_lock);
+-#endif
+-
+-MODULE_AUTHOR("Filip Sneppe <filip.sneppe@cronos.be>");
+-MODULE_DESCRIPTION("Microsoft Windows Media Services (MMS) connection tracking module");
+-MODULE_LICENSE("GPL");
+-
+-/* #define isdigit(c) (c >= '0' && c <= '9') */
+-
+-/* copied from drivers/usb/serial/io_edgeport.c - not perfect but will do the trick */
+-static void unicode_to_ascii (char *string, short *unicode, int unicode_size)
+-{
+-	int i;
+-	for (i = 0; i < unicode_size; ++i) {
+-		string[i] = (char)(unicode[i]);
+-	}
+-	string[unicode_size] = 0x00;
+-}
+-
+-__inline static int atoi(char *s) 
+-{
+-	int i=0;
+-	while (isdigit(*s)) {
+-		i = i*10 + *(s++) - '0';
+-	}
+-	return i;
+-}
+-
+-/* convert ip address string like "192.168.0.10" to unsigned int */
+-__inline static u_int32_t asciiiptoi(char *s)
+-{
+-	unsigned int i, j, k;
+-
+-	for(i=k=0; k<3; ++k, ++s, i<<=8) {
+-		i+=atoi(s);
+-		for(j=0; (*(++s) != '.') && (j<3); ++j)
+-			;
+-	}
+-	i+=atoi(s);
+-	return ntohl(i);
+-}
+-
+-int parse_mms(const char *data, 
+-	      const unsigned int datalen,
+-	      u_int32_t *mms_ip,
+-	      u_int16_t *mms_proto,
+-	      u_int16_t *mms_port,
+-	      char **mms_string_b,
+-	      char **mms_string_e,
+-	      char **mms_padding_e)
+-{
+-	int unicode_size, i;
+-	char tempstring[28];       /* "\\255.255.255.255\UDP\65535" */
+-	char getlengthstring[28];
+-	
+-	for(unicode_size=0; 
+-	    (char) *(data+(MMS_SRV_UNICODE_STRING_OFFSET+unicode_size*2)) != (char)0;
+-	    unicode_size++)
+-		if ((unicode_size == 28) || (MMS_SRV_UNICODE_STRING_OFFSET+unicode_size*2 >= datalen)) 
+-			return -1; /* out of bounds - incomplete packet */
+-	
+-	unicode_to_ascii(tempstring, (short *)(data+MMS_SRV_UNICODE_STRING_OFFSET), unicode_size);
+-	DEBUGP("ip_conntrack_mms: offset 60: %s\n", (const char *)(tempstring));
+-	
+-	/* IP address ? */
+-	*mms_ip = asciiiptoi(tempstring+2);
+-	
+-	i=sprintf(getlengthstring, "%u.%u.%u.%u", HIPQUAD(*mms_ip));
+-		
+-	/* protocol ? */
+-	if(strncmp(tempstring+3+i, "TCP", 3)==0)
+-		*mms_proto = IPPROTO_TCP;
+-	else if(strncmp(tempstring+3+i, "UDP", 3)==0)
+-		*mms_proto = IPPROTO_UDP;
+-
+-	/* port ? */
+-	*mms_port = atoi(tempstring+7+i);
+-
+-	/* we store a pointer to the beginning of the "\\a.b.c.d\proto\port" 
+-	   unicode string, one to the end of the string, and one to the end 
+-	   of the packet, since we must keep track of the number of bytes 
+-	   between end of the unicode string and the end of packet (padding) */
+-	*mms_string_b  = (char *)(data + MMS_SRV_UNICODE_STRING_OFFSET);
+-	*mms_string_e  = (char *)(data + MMS_SRV_UNICODE_STRING_OFFSET + unicode_size * 2);
+-	*mms_padding_e = (char *)(data + datalen); /* looks funny, doesn't it */
+-	return 0;
+-}
+-
+-
+-static int help(const struct iphdr *iph, size_t len,
+-		struct ip_conntrack *ct,
+-		enum ip_conntrack_info ctinfo)
+-{
+-	/* tcplen not negative guaranteed by ip_conntrack_tcp.c */
+-	struct tcphdr *tcph = (void *)iph + iph->ihl * 4;
+-	const char *data = (const char *)tcph + tcph->doff * 4;
+-	unsigned int tcplen = len - iph->ihl * 4;
+-	unsigned int datalen = tcplen - tcph->doff * 4;
+-	int dir = CTINFO2DIR(ctinfo);
+-	struct ip_conntrack_expect expect, *exp = &expect; 
+-	struct ip_ct_mms_expect *exp_mms_info = &exp->help.exp_mms_info;
+-	
+-	u_int32_t mms_ip;
+-	u_int16_t mms_proto;
+-	char mms_proto_string[8];
+-	u_int16_t mms_port;
+-	char *mms_string_b, *mms_string_e, *mms_padding_e;
+-	     
+-	/* Until there's been traffic both ways, don't look in packets. */
+-	if (ctinfo != IP_CT_ESTABLISHED
+-	    && ctinfo != IP_CT_ESTABLISHED+IP_CT_IS_REPLY) {
+-		DEBUGP("ip_conntrack_mms: Conntrackinfo = %u\n", ctinfo);
+-		return NF_ACCEPT;
+-	}
+-
+-	/* Not whole TCP header? */
+-	if (tcplen < sizeof(struct tcphdr) || tcplen < tcph->doff*4) {
+-		DEBUGP("ip_conntrack_mms: tcplen = %u\n", (unsigned)tcplen);
+-		return NF_ACCEPT;
+-	}
+-
+-	/* Checksum invalid?  Ignore. */
+-	if (tcp_v4_check(tcph, tcplen, iph->saddr, iph->daddr,
+-	    csum_partial((char *)tcph, tcplen, 0))) {
+-		DEBUGP("mms_help: bad csum: %p %u %u.%u.%u.%u %u.%u.%u.%u\n",
+-		       tcph, tcplen, NIPQUAD(iph->saddr),
+-		       NIPQUAD(iph->daddr));
+-		return NF_ACCEPT;
+-	}
+-	
+-	/* Only look at packets with 0x00030002/196610 on bytes 36->39 of TCP payload */
+-	if( (MMS_SRV_MSG_OFFSET < datalen) && 
+-	    ((*(u32 *)(data+MMS_SRV_MSG_OFFSET)) == MMS_SRV_MSG_ID)) {
+-		DEBUGP("ip_conntrack_mms: offset 37: %u %u %u %u, datalen:%u\n", 
+-		       (u8)*(data+36), (u8)*(data+37), 
+-		       (u8)*(data+38), (u8)*(data+39),
+-		       datalen);
+-		if(parse_mms(data, datalen, &mms_ip, &mms_proto, &mms_port,
+-		             &mms_string_b, &mms_string_e, &mms_padding_e))
+-			if(net_ratelimit())
+-				printk(KERN_WARNING
+-				       "ip_conntrack_mms: Unable to parse data payload\n");
+-
+-		memset(&expect, 0, sizeof(expect));
+-
+-		sprintf(mms_proto_string, "(%u)", mms_proto);
+-		DEBUGP("ip_conntrack_mms: adding %s expectation %u.%u.%u.%u -> %u.%u.%u.%u:%u\n",
+-		       mms_proto == IPPROTO_TCP ? "TCP"
+-		       : mms_proto == IPPROTO_UDP ? "UDP":mms_proto_string,
+-		       NIPQUAD(ct->tuplehash[!dir].tuple.src.ip),
+-		       NIPQUAD(mms_ip),
+-		       mms_port);
+-		
+-		/* it's possible that the client will just ask the server to tunnel
+-		   the stream over the same TCP session (from port 1755): there's 
+-		   shouldn't be a need to add an expectation in that case, but it
+-		   makes NAT packet mangling so much easier */
+-		LOCK_BH(&ip_mms_lock);
+-
+-		DEBUGP("ip_conntrack_mms: tcph->seq = %u\n", tcph->seq);
+-		
+-		exp->seq = ntohl(tcph->seq) + (mms_string_b - data);
+-		exp_mms_info->len     = (mms_string_e  - mms_string_b);
+-		exp_mms_info->padding = (mms_padding_e - mms_string_e);
+-		exp_mms_info->port    = mms_port;
+-		
+-		DEBUGP("ip_conntrack_mms: wrote info seq=%u (ofs=%u), len=%d, padding=%u\n",
+-		       exp->seq, (mms_string_e - data), exp_mms_info->len, exp_mms_info->padding);
+-		
+-		exp->tuple = ((struct ip_conntrack_tuple)
+-		              { { ct->tuplehash[!dir].tuple.src.ip, { 0 } },
+-		              { mms_ip,
+-		                { (__u16) ntohs(mms_port) },
+-		                mms_proto } }
+-		             );
+-		exp->mask  = ((struct ip_conntrack_tuple)
+-		             { { 0xFFFFFFFF, { 0 } },
+-		               { 0xFFFFFFFF, { 0xFFFF }, 0xFFFF }});
+-		exp->expectfn = NULL;
+-		ip_conntrack_expect_related(ct, &expect);
+-		UNLOCK_BH(&ip_mms_lock);
+-	}
+-
+-	return NF_ACCEPT;
+-}
+-
+-static struct ip_conntrack_helper mms[MAX_PORTS];
+-static char mms_names[MAX_PORTS][10];
+-
+-/* Not __exit: called from init() */
+-static void fini(void)
+-{
+-	int i;
+-	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
+-		DEBUGP("ip_conntrack_mms: unregistering helper for port %d\n",
+-				ports[i]);
+-		ip_conntrack_helper_unregister(&mms[i]);
+-	}
+-}
+-
+-static int __init init(void)
+-{
+-	int i, ret;
+-	char *tmpname;
+-
+-	if (ports[0] == 0)
+-		ports[0] = MMS_PORT;
+-
+-	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
+-		memset(&mms[i], 0, sizeof(struct ip_conntrack_helper));
+-		mms[i].tuple.src.u.tcp.port = htons(ports[i]);
+-		mms[i].tuple.dst.protonum = IPPROTO_TCP;
+-		mms[i].mask.src.u.tcp.port = 0xFFFF;
+-		mms[i].mask.dst.protonum = 0xFFFF;
+-		mms[i].max_expected = 1;
+-		mms[i].timeout = 0;
+-		mms[i].flags = IP_CT_HELPER_F_REUSE_EXPECT;
+-		mms[i].me = THIS_MODULE;
+-		mms[i].help = help;
+-
+-		tmpname = &mms_names[i][0];
+-		if (ports[i] == MMS_PORT)
+-			sprintf(tmpname, "mms");
+-		else
+-			sprintf(tmpname, "mms-%d", ports[i]);
+-		mms[i].name = tmpname;
+-
+-		DEBUGP("ip_conntrack_mms: registering helper for port %d\n", 
+-				ports[i]);
+-		ret = ip_conntrack_helper_register(&mms[i]);
+-
+-		if (ret) {
+-			fini();
+-			return ret;
+-		}
+-		ports_c++;
+-	}
+-	return 0;
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_pptp.c linux.stock/net/ipv4/netfilter/ip_conntrack_pptp.c
+--- linux/net/ipv4/netfilter/ip_conntrack_pptp.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_pptp.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,531 +0,0 @@
+-/*
+- * ip_conntrack_pptp.c	- Version 1.11
+- *
+- * 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) 2000-2002 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 
+- */
+-
+-#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>
+-
+-MODULE_LICENSE("GPL");
+-MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+-MODULE_DESCRIPTION("Netfilter connection tracking helper module for PPTP");
+-
+-DECLARE_LOCK(ip_pptp_lock);
+-
+-#define DEBUGP(format, args...)
+-
+-#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_expect *exp, *other_exp;
+-	struct ip_conntrack *master;
+-
+-	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;
+-	}
+-
+-	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.pns_call_id);
+-	}
+-
+-	return 0;
+-}
+-
+-/* timeout GRE data connections */
+-static int pptp_timeout_related(struct ip_conntrack *ct)
+-{
+-	struct list_head *cur_item;
+-	struct ip_conntrack_expect *exp;
+-
+-	list_for_each(cur_item, &ct->sibling_list) {
+-		exp = list_entry(cur_item, struct ip_conntrack_expect,
+-				 expected_list);
+-
+-		if (!exp->sibling)
+-			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 connection in PNS->PAC 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, PAC->PNS */
+-	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.u.gre.protocol = __constant_htons(GRE_PROTOCOL_PPTP);
+-	exp.tuple.dst.u.gre.version = GRE_VERSION_PPTP;
+-	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.u.gre.version = 0xff;
+-	exp.mask.dst.u.gre.protocol = 0xffff;
+-	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 */
+-	ip_ct_gre_keymap_add(&exp, &exp.tuple, 0);
+-	invert_tuplepr(&inv_tuple, &exp.tuple);
+-	ip_ct_gre_keymap_add(&exp, &inv_tuple, 1);
+-	
+-	ip_conntrack_expect_related(master, &exp);
+-
+-	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);
+-		exp_gre(ct, seq, *cid, *pcid);
+-		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);
+-		exp_gre(ct, seq, *cid, *pcid);
+-
+-		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);
+-		/* NEWNAT: look up exp for call id and unexpct_related */
+-		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");
+-//		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);
+-		/* no need to call unexpect_related since master conn
+-		 * dies anyway */
+-	}
+-
+-
+-	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);
+-
+-	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 = { 
+-	{ NULL, NULL },
+-	"pptp", IP_CT_HELPER_F_REUSE_EXPECT, THIS_MODULE, 2, 0,
+-	{ { 0, { tcp: { port: __constant_htons(PPTP_CONTROL_PORT) } } }, 
+-	  { 0, { 0 }, IPPROTO_TCP } },
+-	{ { 0, { tcp: { port: 0xffff } } }, 
+-	  { 0, { 0 }, 0xffff } },
+-	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;
+-	}
+-
+-	return 0;
+-}
+-
+-static void __exit fini(void)
+-{
+-	ip_conntrack_helper_unregister(&pptp);
+-}
+-
+-module_init(init);
+-module_exit(fini);
+-
+-EXPORT_SYMBOL(ip_pptp_lock);
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_pptp_priv.h linux.stock/net/ipv4/netfilter/ip_conntrack_pptp_priv.h
+--- linux/net/ipv4/netfilter/ip_conntrack_pptp_priv.h	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_pptp_priv.h	1969-12-31 19:00:00.000000000 -0500
+@@ -1,24 +0,0 @@
+-#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 -Nurb linux/net/ipv4/netfilter/ip_conntrack_proto_gre.c linux.stock/net/ipv4/netfilter/ip_conntrack_proto_gre.c
+--- linux/net/ipv4/netfilter/ip_conntrack_proto_gre.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_proto_gre.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,320 +0,0 @@
+-/*
+- * ip_conntrack_proto_gre.c - Version 1.11
+- *
+- * 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) 2000-2002 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)
+-
+-#define DEBUGP(x, args...)
+-#define DUMP_TUPLE_GRE(x)
+-				
+-/* 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));
+-	km->master = exp;
+-
+-	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);
+-}
+-
+-
+-/* 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.protocol = orig->dst.u.gre.protocol;
+-	tuple->dst.u.gre.version = orig->dst.u.gre.version;
+-
+-	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 */
+-
+-	tuple->dst.u.gre.version = grehdr->version; 
+-	tuple->dst.u.gre.protocol = grehdr->protocol;
+-
+-	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",
+-				tuple->dst.u.gre.version);
+-			return 0;
+-	}
+-
+-	srckey = gre_keymap_lookup(tuple);
+-
+-	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, "version=%d protocol=0x%04x srckey=0x%x dstkey=0x%x ", 
+-			tuple->dst.u.gre.version,
+-			ntohs(tuple->dst.u.gre.protocol),
+-			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;
+-	}
+-
+-	WRITE_LOCK(&ip_ct_gre_lock);
+-	if (master->proto.gre.keymap_orig) {
+-		DEBUGP("removing %p from list\n", master->proto.gre.keymap_orig);
+-		list_del(&master->proto.gre.keymap_orig->list);
+-		kfree(master->proto.gre.keymap_orig);
+-	}
+-	if (master->proto.gre.keymap_reply) {
+-		DEBUGP("removing %p from list\n", master->proto.gre.keymap_reply);
+-		list_del(&master->proto.gre.keymap_reply->list);
+-		kfree(master->proto.gre.keymap_reply);
+-	}
+-	WRITE_UNLOCK(&ip_ct_gre_lock);
+-}
+-
+-/* 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\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);
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_proto_tcp.c linux.stock/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
+--- linux/net/ipv4/netfilter/ip_conntrack_proto_tcp.c	2003-08-12 07:33:45.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_proto_tcp.c	2004-05-09 04:13:03.000000000 -0400
+@@ -15,11 +15,17 @@
+ #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
+ #include <linux/netfilter_ipv4/lockhelp.h>
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ /* Protects conntrack->proto.tcp */
+ static DECLARE_RWLOCK(tcp_lock);
+ 
++/* FIXME: Examine ipfilter's timeouts and conntrack transitions more
++   closely.  They're more complex. --RR */
+ 
+ /* Actually, I believe that neither ipmasq (where this code is stolen
+    from) nor ipfilter do it exactly right.  A new conntrack machine taking
+@@ -39,6 +45,25 @@
+ 	"LISTEN"
+ };
+ 
++#define SECS *HZ
++#define MINS * 60 SECS
++#define HOURS * 60 MINS
++#define DAYS * 24 HOURS
++
++
++static unsigned long tcp_timeouts[]
++= { 30 MINS, 	/*	TCP_CONNTRACK_NONE,	*/
++    5 DAYS,	/*	TCP_CONNTRACK_ESTABLISHED,	*/
++    2 MINS,	/*	TCP_CONNTRACK_SYN_SENT,	*/
++    60 SECS,	/*	TCP_CONNTRACK_SYN_RECV,	*/
++    2 MINS,	/*	TCP_CONNTRACK_FIN_WAIT,	*/
++    2 MINS,	/*	TCP_CONNTRACK_TIME_WAIT,	*/
++    10 SECS,	/*	TCP_CONNTRACK_CLOSE,	*/
++    60 SECS,	/*	TCP_CONNTRACK_CLOSE_WAIT,	*/
++    30 SECS,	/*	TCP_CONNTRACK_LAST_ACK,	*/
++    2 MINS,	/*	TCP_CONNTRACK_LISTEN,	*/
++};
++
+ #define sNO TCP_CONNTRACK_NONE
+ #define sES TCP_CONNTRACK_ESTABLISHED
+ #define sSS TCP_CONNTRACK_SYN_SENT
+@@ -161,13 +186,13 @@
+ 	    && tcph->syn && tcph->ack)
+ 		conntrack->proto.tcp.handshake_ack
+ 			= htonl(ntohl(tcph->seq) + 1);
++	WRITE_UNLOCK(&tcp_lock);
+ 
+ 	/* If only reply is a RST, we can consider ourselves not to
+ 	   have an established connection: this is a fairly common
+ 	   problem case, so we can delete the conntrack
+ 	   immediately.  --RR */
+ 	if (!(conntrack->status & IPS_SEEN_REPLY) && tcph->rst) {
+-		WRITE_UNLOCK(&tcp_lock);
+ 		if (del_timer(&conntrack->timeout))
+ 			conntrack->timeout.function((unsigned long)conntrack);
+ 	} else {
+@@ -178,9 +203,7 @@
+ 		    && tcph->ack_seq == conntrack->proto.tcp.handshake_ack)
+ 			set_bit(IPS_ASSURED_BIT, &conntrack->status);
+ 
+-		WRITE_UNLOCK(&tcp_lock);
+- 		ip_ct_refresh(conntrack, 
+- 			sysctl_ip_conntrack_tcp_timeouts[newconntrack]);
++		ip_ct_refresh(conntrack, tcp_timeouts[newconntrack]);
+ 	}
+ 
+ 	return NF_ACCEPT;
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_proto_udp.c linux.stock/net/ipv4/netfilter/ip_conntrack_proto_udp.c
+--- linux/net/ipv4/netfilter/ip_conntrack_proto_udp.c	2003-08-12 07:33:45.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_proto_udp.c	2004-05-09 04:13:03.000000000 -0400
+@@ -5,7 +5,9 @@
+ #include <linux/in.h>
+ #include <linux/udp.h>
+ #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_udp.h>
++
++#define UDP_TIMEOUT (30*HZ)
++#define UDP_STREAM_TIMEOUT (180*HZ)
+ 
+ static int udp_pkt_to_tuple(const void *datah, size_t datalen,
+ 			    struct ip_conntrack_tuple *tuple)
+@@ -50,13 +52,11 @@
+ 	/* If we've seen traffic both ways, this is some kind of UDP
+ 	   stream.  Extend timeout. */
+ 	if (conntrack->status & IPS_SEEN_REPLY) {
+-		ip_ct_refresh(conntrack, 
+-			sysctl_ip_conntrack_udp_timeouts[UDP_STREAM_TIMEOUT]);
++		ip_ct_refresh(conntrack, UDP_STREAM_TIMEOUT);
+ 		/* Also, more likely to be important, and not a probe */
+ 		set_bit(IPS_ASSURED_BIT, &conntrack->status);
+ 	} else
+-		ip_ct_refresh(conntrack, 
+-			sysctl_ip_conntrack_udp_timeouts[UDP_TIMEOUT]);
++		ip_ct_refresh(conntrack, UDP_TIMEOUT);
+ 
+ 	return NF_ACCEPT;
+ }
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_standalone.c linux.stock/net/ipv4/netfilter/ip_conntrack_standalone.c
+--- linux/net/ipv4/netfilter/ip_conntrack_standalone.c	2003-08-12 07:33:45.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_standalone.c	2004-05-09 04:13:03.000000000 -0400
+@@ -27,7 +27,11 @@
+ #include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+ #include <linux/netfilter_ipv4/listhelp.h>
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ struct module *ip_conntrack_module = THIS_MODULE;
+ MODULE_LICENSE("GPL");
+@@ -52,17 +56,12 @@
+ 	return len;
+ }
+ 
++/* FIXME: Don't print source proto part. --RR */
+ static unsigned int
+ print_expect(char *buffer, const struct ip_conntrack_expect *expect)
+ {
+ 	unsigned int len;
+ 
+-	if (!expect  || !expect->expectant || !expect->expectant->helper) {
+-		DEBUGP("expect  %x expect->expectant %x expect->expectant->helper %x\n", 
+-			expect, expect->expectant, expect->expectant->helper);
+-		return 0;
+-	}
+-
+ 	if (expect->expectant->helper->timeout)
+ 		len = sprintf(buffer, "EXPECTING: %lu ",
+ 			      timer_pending(&expect->timeout)
+@@ -294,6 +293,8 @@
+ 	return ret;
+ }
+ 
++/* FIXME: Allow NULL functions and sub in pointers to generic for
++   them. --RR */
+ int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
+ {
+ 	int ret = 0;
+@@ -362,8 +363,6 @@
+ EXPORT_SYMBOL(ip_ct_find_proto);
+ EXPORT_SYMBOL(__ip_ct_find_proto);
+ EXPORT_SYMBOL(ip_ct_find_helper);
+-EXPORT_SYMBOL(sysctl_ip_conntrack_tcp_timeouts);
+-EXPORT_SYMBOL(sysctl_ip_conntrack_udp_timeouts);
+ EXPORT_SYMBOL(ip_conntrack_expect_related);
+ EXPORT_SYMBOL(ip_conntrack_change_expect);
+ EXPORT_SYMBOL(ip_conntrack_unexpect_related);
+diff -Nurb linux/net/ipv4/netfilter/ip_conntrack_tftp.c linux.stock/net/ipv4/netfilter/ip_conntrack_tftp.c
+--- linux/net/ipv4/netfilter/ip_conntrack_tftp.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_conntrack_tftp.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,126 +0,0 @@
+-/*
+- * Licensed under GNU GPL version 2 Copyright Magnus Boden <mb@ozaba.mine.nu>
+- * Version: 0.0.7
+- *
+- * Thu 21 Mar 2002 Harald Welte <laforge@gnumonks.org>
+- * 	- port to newnat API
+- *
+- */
+-
+-#include <linux/module.h>
+-#include <linux/ip.h>
+-#include <linux/udp.h>
+-
+-#include <linux/netfilter.h>
+-#include <linux/netfilter_ipv4/ip_tables.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_tftp.h>
+-
+-MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>");
+-MODULE_DESCRIPTION("Netfilter connection tracking module for tftp");
+-MODULE_LICENSE("GPL");
+-
+-#define MAX_PORTS 8
+-static int ports[MAX_PORTS];
+-static int ports_c = 0;
+-#ifdef MODULE_PARM
+-MODULE_PARM(ports, "1-" __MODULE_STRING(MAX_PORTS) "i");
+-MODULE_PARM_DESC(ports, "port numbers of tftp servers");
+-#endif
+-
+-#define DEBUGP(format, args...)
+-
+-static int tftp_help(const struct iphdr *iph, size_t len,
+-	struct ip_conntrack *ct,
+-	enum ip_conntrack_info ctinfo)
+-{
+-	struct udphdr *udph = (void *)iph + iph->ihl * 4;
+-	struct tftphdr *tftph = (void *)udph + 8;
+-	struct ip_conntrack_expect exp;
+-	
+-	switch (ntohs(tftph->opcode)) {
+-	/* RRQ and WRQ works the same way */
+-	case TFTP_OPCODE_READ:
+-	case TFTP_OPCODE_WRITE:
+-		DEBUGP("");
+-		DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+-		DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+-		memset(&exp, 0, sizeof(exp));
+-
+-		exp.tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+-		exp.mask.src.ip = 0xffffffff;
+-		exp.mask.dst.ip = 0xffffffff;
+-		exp.mask.dst.u.udp.port = 0xffff;
+-		exp.mask.dst.protonum = 0xffff;
+-		exp.expectfn = NULL;
+-
+-		DEBUGP("expect: ");
+-		DUMP_TUPLE(&exp.tuple);
+-		DUMP_TUPLE(&exp.mask);
+-		ip_conntrack_expect_related(ct, &exp);
+-		break;
+-	default:
+-		DEBUGP("Unknown opcode\n");
+-	}
+-	return NF_ACCEPT;
+-}
+-
+-static struct ip_conntrack_helper tftp[MAX_PORTS];
+-static char tftp_names[MAX_PORTS][10];
+-
+-static void fini(void)
+-{
+-	int i;
+-
+-	for (i = 0 ; i < ports_c; i++) {
+-		DEBUGP("unregistering helper for port %d\n",
+-			ports[i]);
+-		ip_conntrack_helper_unregister(&tftp[i]);
+-	} 
+-}
+-
+-static int __init init(void)
+-{
+-	int i, ret;
+-	char *tmpname;
+-
+-	if (!ports[0])
+-		ports[0]=TFTP_PORT;
+-
+-	for (i = 0 ; (i < MAX_PORTS) && ports[i] ; i++) {
+-		/* Create helper structure */
+-		memset(&tftp[i], 0, sizeof(struct ip_conntrack_helper));
+-
+-		tftp[i].tuple.dst.protonum = IPPROTO_UDP;
+-		tftp[i].tuple.src.u.udp.port = htons(ports[i]);
+-		tftp[i].mask.dst.protonum = 0xFFFF;
+-		tftp[i].mask.src.u.udp.port = 0xFFFF;
+-		tftp[i].max_expected = 1;
+-		tftp[i].timeout = 0;
+-		tftp[i].flags = IP_CT_HELPER_F_REUSE_EXPECT;
+-		tftp[i].me = THIS_MODULE;
+-		tftp[i].help = tftp_help;
+-
+-		tmpname = &tftp_names[i][0];
+-		if (ports[i] == TFTP_PORT)
+-			sprintf(tmpname, "tftp");
+-		else
+-			sprintf(tmpname, "tftp-%d", i);
+-		tftp[i].name = tmpname;
+-
+-		DEBUGP("port #%d: %d\n", i, ports[i]);
+-
+-		ret=ip_conntrack_helper_register(&tftp[i]);
+-		if (ret) {
+-			printk("ERROR registering helper for port %d\n",
+-				ports[i]);
+-			fini();
+-			return(ret);
+-		}
+-		ports_c++;
+-	}
+-	return(0);
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_core.c linux.stock/net/ipv4/netfilter/ip_nat_core.c
+--- linux/net/ipv4/netfilter/ip_nat_core.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_core.c	2004-05-09 04:13:03.000000000 -0400
+@@ -31,7 +31,11 @@
+ #include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+ #include <linux/netfilter_ipv4/listhelp.h>
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ DECLARE_RWLOCK(ip_nat_lock);
+ DECLARE_RWLOCK_EXTERN(ip_conntrack_lock);
+@@ -207,6 +211,7 @@
+ {
+ 	struct rtable *rt;
+ 
++	/* FIXME: IPTOS_TOS(iph->tos) --RR */
+ 	if (ip_route_output(&rt, var_ip, 0, 0, 0) != 0) {
+ 		DEBUGP("do_extra_mangle: Can't get route to %u.%u.%u.%u\n",
+ 		       NIPQUAD(var_ip));
+@@ -429,7 +434,7 @@
+ 	*tuple = *orig_tuple;
+ 	while ((rptr = find_best_ips_proto_fast(tuple, mr, conntrack, hooknum))
+ 	       != NULL) {
+-		DEBUGP("Found best for "); DUMP_TUPLE_RAW(tuple);
++		DEBUGP("Found best for "); DUMP_TUPLE(tuple);
+ 		/* 3) The per-protocol part of the manip is made to
+ 		   map into the range to make a unique tuple. */
+ 
+@@ -529,6 +534,31 @@
+ 	invert_tuplepr(&orig_tp,
+ 		       &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple);
+ 
++#if 0
++	{
++	unsigned int i;
++
++	DEBUGP("Hook %u (%s), ", hooknum,
++	       HOOK2MANIP(hooknum)==IP_NAT_MANIP_SRC ? "SRC" : "DST");
++	DUMP_TUPLE(&orig_tp);
++	DEBUGP("Range %p: ", mr);
++	for (i = 0; i < mr->rangesize; i++) {
++		DEBUGP("%u:%s%s%s %u.%u.%u.%u - %u.%u.%u.%u %u - %u\n",
++		       i,
++		       (mr->range[i].flags & IP_NAT_RANGE_MAP_IPS)
++		       ? " MAP_IPS" : "",
++		       (mr->range[i].flags
++			& IP_NAT_RANGE_PROTO_SPECIFIED)
++		       ? " PROTO_SPECIFIED" : "",
++		       (mr->range[i].flags & IP_NAT_RANGE_FULL)
++		       ? " FULL" : "",
++		       NIPQUAD(mr->range[i].min_ip),
++		       NIPQUAD(mr->range[i].max_ip),
++		       mr->range[i].min.all,
++		       mr->range[i].max.all);
++	}
++	}
++#endif
+ 
+ 	do {
+ 		if (!get_unique_tuple(&new_tuple, &orig_tp, mr, conntrack,
+@@ -538,6 +568,15 @@
+ 			return NF_DROP;
+ 		}
+ 
++#if 0
++		DEBUGP("Hook %u (%s) %p\n", hooknum,
++		       HOOK2MANIP(hooknum)==IP_NAT_MANIP_SRC ? "SRC" : "DST",
++		       conntrack);
++		DEBUGP("Original: ");
++		DUMP_TUPLE(&orig_tp);
++		DEBUGP("New: ");
++		DUMP_TUPLE(&new_tuple);
++#endif
+ 
+ 		/* We now have two tuples (SRCIP/SRCPT/DSTIP/DSTPT):
+ 		   the original (A/B/C/D') and the mangled one (E/F/G/H').
+@@ -554,6 +593,8 @@
+                    If fail this race (reply tuple now used), repeat. */
+ 	} while (!ip_conntrack_alter_reply(conntrack, &reply));
+ 
++	/* FIXME: We can simply used existing conntrack reply tuple
++           here --RR */
+ 	/* Create inverse of original: C/D/A/B' */
+ 	invert_tuplepr(&inv_tuple, &orig_tp);
+ 
+@@ -678,6 +719,17 @@
+ 						iph->check);
+ 		iph->daddr = manip->ip;
+ 	}
++#if 0
++	if (ip_fast_csum((u8 *)iph, iph->ihl) != 0)
++		DEBUGP("IP: checksum on packet bad.\n");
++
++	if (proto == IPPROTO_TCP) {
++		void *th = (u_int32_t *)iph + iph->ihl;
++		if (tcp_v4_check(th, len - 4*iph->ihl, iph->saddr, iph->daddr,
++				 csum_partial((char *)th, len-4*iph->ihl, 0)))
++			DEBUGP("TCP: checksum on packet bad\n");
++	}
++#endif
+ }
+ 
+ static inline int exp_for_packet(struct ip_conntrack_expect *exp,
+@@ -765,6 +817,7 @@
+ 				continue;
+ 
+ 			if (exp_for_packet(exp, pskb)) {
++				/* FIXME: May be true multiple times in the case of UDP!! */
+ 				DEBUGP("calling nat helper (exp=%p) for packet\n",
+ 					exp);
+ 				ret = helper->help(ct, exp, info, ctinfo, 
+@@ -926,6 +979,7 @@
+ 		INIT_LIST_HEAD(&byipsproto[i]);
+ 	}
+ 
++	/* FIXME: Man, this is a hack.  <SIGH> */
+ 	IP_NF_ASSERT(ip_conntrack_destroyed == NULL);
+ 	ip_conntrack_destroyed = &ip_nat_cleanup_conntrack;
+ 
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_h323.c linux.stock/net/ipv4/netfilter/ip_nat_h323.c
+--- linux/net/ipv4/netfilter/ip_nat_h323.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_h323.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,403 +0,0 @@
+-/* 
+- * H.323 'brute force' extension for NAT alteration. 
+- * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+- *
+- * Based on ip_masq_h323.c for 2.2 kernels from CoRiTel, Sofia project.
+- * (http://www.coritel.it/projects/sofia/nat.html)
+- * Uses Sampsa Ranta's excellent idea on using expectfn to 'bind'
+- * the unregistered helpers to the conntrack entries.
+- */
+-
+-
+-#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_nat.h>
+-#include <linux/netfilter_ipv4/ip_nat_helper.h>
+-#include <linux/netfilter_ipv4/ip_nat_rule.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_h323.h>
+-
+-MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
+-MODULE_DESCRIPTION("H.323 'brute force' connection tracking module");
+-MODULE_LICENSE("GPL");
+-
+-DECLARE_LOCK_EXTERN(ip_h323_lock);
+-struct module *ip_nat_h323 = THIS_MODULE;
+-
+-#define DEBUGP(format, args...)
+-
+-
+-static unsigned int 
+-h225_nat_expected(struct sk_buff **pskb,
+-		  unsigned int hooknum,
+-		  struct ip_conntrack *ct,
+-		  struct ip_nat_info *info);
+-
+-static unsigned int h225_nat_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);
+-		  
+-static struct ip_nat_helper h245 = 
+-	{ { NULL, NULL },
+-          "H.245",				/* name */
+-	  0,					/* flags */
+-	  NULL,					/* module */
+-	  { { 0, { 0 } },			/* tuple */
+-	    { 0, { 0 }, IPPROTO_TCP } },
+-	  { { 0, { 0xFFFF } },			/* mask */
+-	    { 0, { 0 }, 0xFFFF } },
+-	  h225_nat_help,			/* helper */
+-	  h225_nat_expected			/* expectfn */
+-	};
+-
+-static unsigned int
+-h225_nat_expected(struct sk_buff **pskb,
+-		  unsigned int hooknum,
+-		  struct ip_conntrack *ct,
+-		  struct ip_nat_info *info)
+-{
+-	struct ip_nat_multi_range mr;
+-	u_int32_t newdstip, newsrcip, newip;
+-	u_int16_t port;
+-	struct ip_ct_h225_expect *exp_info;
+-	struct ip_ct_h225_master *master_info;
+-	struct ip_conntrack *master = master_ct(ct);
+-	unsigned int is_h225, ret;
+-	
+-	IP_NF_ASSERT(info);
+-	IP_NF_ASSERT(master);
+-
+-	IP_NF_ASSERT(!(info->initialized & (1<<HOOK2MANIP(hooknum))));
+-
+-	DEBUGP("h225_nat_expected: We have a connection!\n");
+-	master_info = &ct->master->expectant->help.ct_h225_info;
+-	exp_info = &ct->master->help.exp_h225_info;
+-
+-	LOCK_BH(&ip_h323_lock);
+-
+-	DEBUGP("master: ");
+-	DUMP_TUPLE(&master->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+-	DUMP_TUPLE(&master->tuplehash[IP_CT_DIR_REPLY].tuple);
+-	DEBUGP("conntrack: ");
+-	DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+-	if (exp_info->dir == IP_CT_DIR_ORIGINAL) {
+-		/* Make connection go to the client. */
+-		newdstip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+-		newsrcip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+-		DEBUGP("h225_nat_expected: %u.%u.%u.%u->%u.%u.%u.%u (to client)\n",
+-		       NIPQUAD(newsrcip), NIPQUAD(newdstip));
+-	} else {
+-		/* Make the connection go to the server */
+-		newdstip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
+-		newsrcip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-		DEBUGP("h225_nat_expected: %u.%u.%u.%u->%u.%u.%u.%u (to server)\n",
+-		       NIPQUAD(newsrcip), NIPQUAD(newdstip));
+-	}
+-	port = exp_info->port;
+-	is_h225 = master_info->is_h225 == H225_PORT;
+-	UNLOCK_BH(&ip_h323_lock);
+-	
+-	if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC)
+-		newip = newsrcip;
+-	else
+-		newip = newdstip;
+-
+-	DEBUGP("h225_nat_expected: IP to %u.%u.%u.%u\n", NIPQUAD(newip));
+-
+-	mr.rangesize = 1;
+-	/* We don't want to manip the per-protocol, just the IPs... */
+-	mr.range[0].flags = IP_NAT_RANGE_MAP_IPS;
+-	mr.range[0].min_ip = mr.range[0].max_ip = newip;
+-
+-	/* ... unless we're doing a MANIP_DST, in which case, make
+-	   sure we map to the correct port */
+-	if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_DST) {
+-		mr.range[0].flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+-		mr.range[0].min = mr.range[0].max
+-			= ((union ip_conntrack_manip_proto)
+-				{ port });
+-	}
+-
+-	ret = ip_nat_setup_info(ct, &mr, hooknum);
+-	
+-	if (is_h225) {
+-		DEBUGP("h225_nat_expected: H.225, setting NAT helper for %p\n", ct);
+-		/* NAT expectfn called with ip_nat_lock write-locked */
+-		info->helper = &h245;
+-	}
+-	return ret;
+-}
+-
+-static int h323_signal_address_fixup(struct ip_conntrack *ct,
+-			      	     struct sk_buff **pskb,
+-			      	     enum ip_conntrack_info ctinfo)
+-{
+-	struct iphdr *iph = (*pskb)->nh.iph;
+-	struct tcphdr *tcph = (void *)iph + iph->ihl*4;
+-	unsigned char *data;
+-	u_int32_t tcplen = (*pskb)->len - iph->ihl*4;
+-	u_int32_t datalen = tcplen - tcph->doff*4;
+-	struct ip_ct_h225_master *info = &ct->help.ct_h225_info; 
+-	u_int32_t newip;
+-	u_int16_t port;
+-	u_int8_t buffer[6];
+-	int i;
+-
+-	MUST_BE_LOCKED(&ip_h323_lock);
+-
+-	DEBUGP("h323_signal_address_fixup: %s %s\n",
+-		between(info->seq[IP_CT_DIR_ORIGINAL], ntohl(tcph->seq), ntohl(tcph->seq) + datalen)
+-			? "yes" : "no",
+-		between(info->seq[IP_CT_DIR_REPLY], ntohl(tcph->seq), ntohl(tcph->seq) + datalen)
+-			? "yes" : "no");
+-	if (!(between(info->seq[IP_CT_DIR_ORIGINAL], ntohl(tcph->seq), ntohl(tcph->seq) + datalen)
+-	      || between(info->seq[IP_CT_DIR_REPLY], ntohl(tcph->seq), ntohl(tcph->seq) + datalen)))
+-		return 1;
+-
+-	DEBUGP("h323_signal_address_fixup: offsets %u + 6  and %u + 6 in %u\n", 
+-		info->offset[IP_CT_DIR_ORIGINAL], 
+-		info->offset[IP_CT_DIR_REPLY],
+-		tcplen);
+-	DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+-	DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+-
+-	for (i = 0; i < IP_CT_DIR_MAX; i++) {
+-		DEBUGP("h323_signal_address_fixup: %s %s\n",
+-			info->dir == IP_CT_DIR_ORIGINAL ? "original" : "reply",
+-			i == IP_CT_DIR_ORIGINAL ? "caller" : "callee");
+-		if (!between(info->seq[i], ntohl(tcph->seq), 
+-			     ntohl(tcph->seq) + datalen))
+-			continue;
+-		if (!between(info->seq[i] + 6, ntohl(tcph->seq),
+-			     ntohl(tcph->seq) + datalen)) {
+-			/* Partial retransmisison. It's a cracker being funky. */
+-			if (net_ratelimit()) {
+-				printk("H.323_NAT: partial packet %u/6 in %u/%u\n",
+-				     info->seq[i],
+-				     ntohl(tcph->seq),
+-				     ntohl(tcph->seq) + datalen);
+-			}
+-			return 0;
+-		}
+-
+-		/* Change address inside packet to match way we're mapping
+-		   this connection. */
+-		if (i == IP_CT_DIR_ORIGINAL) {
+-			newip = ct->tuplehash[!info->dir].tuple.dst.ip;
+-			port = ct->tuplehash[!info->dir].tuple.dst.u.tcp.port;
+-		} else {
+-			newip = ct->tuplehash[!info->dir].tuple.src.ip;
+-			port = ct->tuplehash[!info->dir].tuple.src.u.tcp.port;
+-		}
+-
+-		data = (char *) tcph + tcph->doff * 4 + info->offset[i];
+-
+-		DEBUGP("h323_signal_address_fixup: orig %s IP:port %u.%u.%u.%u:%u\n", 
+-			i == IP_CT_DIR_ORIGINAL ? "source" : "dest  ", 
+-		        data[0], data[1], data[2], data[3],
+-		        (data[4] << 8 | data[5]));
+-
+-		/* Modify the packet */
+-		memcpy(buffer, &newip, 4);
+-		memcpy(buffer + 4, &port, 2);
+-		if (!ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, info->offset[i],
+-					      6, buffer, 6))
+-			return 0;
+-
+-		DEBUGP("h323_signal_address_fixup:  new %s IP:port %u.%u.%u.%u:%u\n", 
+-			i == IP_CT_DIR_ORIGINAL ? "source" : "dest  ", 
+-		        data[0], data[1], data[2], data[3],
+-		        (data[4] << 8 | data[5]));
+-	}
+-
+-	return 1;
+-}
+-
+-static int h323_data_fixup(struct ip_ct_h225_expect *info,
+-			   struct ip_conntrack *ct,
+-			   struct sk_buff **pskb,
+-			   enum ip_conntrack_info ctinfo,
+-			   struct ip_conntrack_expect *expect)
+-{
+-	u_int32_t newip;
+-	u_int16_t port;
+-	u_int8_t buffer[6];
+-	struct ip_conntrack_tuple newtuple;
+-	struct iphdr *iph = (*pskb)->nh.iph;
+-	struct tcphdr *tcph = (void *)iph + iph->ihl*4;
+-	unsigned char *data;
+-	u_int32_t tcplen = (*pskb)->len - iph->ihl*4;
+-	struct ip_ct_h225_master *master_info = &ct->help.ct_h225_info;
+-	int is_h225;
+-
+-	MUST_BE_LOCKED(&ip_h323_lock);
+-	DEBUGP("h323_data_fixup: offset %u + 6 in %u\n", info->offset, tcplen);
+-	DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+-	DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+-
+-	if (!between(expect->seq + 6, ntohl(tcph->seq),
+-		    ntohl(tcph->seq) + tcplen - tcph->doff * 4)) {
+-		/* Partial retransmisison. It's a cracker being funky. */
+-		if (net_ratelimit()) {
+-			printk("H.323_NAT: partial packet %u/6 in %u/%u\n",
+-			     expect->seq,
+-			     ntohl(tcph->seq),
+-			     ntohl(tcph->seq) + tcplen - tcph->doff * 4);
+-		}
+-		return 0;
+-	}
+-
+-	/* Change address inside packet to match way we're mapping
+-	   this connection. */
+-	if (info->dir == IP_CT_DIR_REPLY) {
+-		/* Must be where client thinks server is */
+-		newip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+-		/* Expect something from client->server */
+-		newtuple.src.ip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+-		newtuple.dst.ip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+-	} else {
+-		/* Must be where server thinks client is */
+-		newip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-		/* Expect something from server->client */
+-		newtuple.src.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
+-		newtuple.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-	}
+-
+-	is_h225 = (master_info->is_h225 == H225_PORT);
+-
+-	if (is_h225) {
+-		newtuple.dst.protonum = IPPROTO_TCP;
+-		newtuple.src.u.tcp.port = expect->tuple.src.u.tcp.port;
+-	} else {
+-		newtuple.dst.protonum = IPPROTO_UDP;
+-		newtuple.src.u.udp.port = expect->tuple.src.u.udp.port;
+-	}
+-	
+-	/* Try to get same port: if not, try to change it. */
+-	for (port = ntohs(info->port); port != 0; port++) {
+-		if (is_h225)
+-			newtuple.dst.u.tcp.port = htons(port);
+-		else
+-			newtuple.dst.u.udp.port = htons(port);
+-
+-		if (ip_conntrack_change_expect(expect, &newtuple) == 0)
+-			break;
+-	}
+-	if (port == 0) {
+-		DEBUGP("h323_data_fixup: no free port found!\n");
+-		return 0;
+-	}
+-
+-	port = htons(port);
+-
+-	data = (char *) tcph + tcph->doff * 4 + info->offset;
+-
+-	DEBUGP("h323_data_fixup: orig IP:port %u.%u.%u.%u:%u\n", 
+-	        data[0], data[1], data[2], data[3],
+-	        (data[4] << 8 | data[5]));
+-
+-	/* Modify the packet */
+-	memcpy(buffer, &newip, 4);
+-	memcpy(buffer + 4, &port, 2);
+-	if (!ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, info->offset,
+-				      6, buffer, 6))
+-		return 0;
+-	
+-	DEBUGP("h323_data_fixup: new IP:port %u.%u.%u.%u:%u\n", 
+-	        data[0], data[1], data[2], data[3],
+-	        (data[4] << 8 | data[5]));
+-
+-	return 1;
+-}
+-
+-static unsigned int h225_nat_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)
+-{
+-	int dir;
+-	struct ip_ct_h225_expect *exp_info;
+-	
+-	/* Only mangle things once: original direction in POST_ROUTING
+-	   and reply direction on PRE_ROUTING. */
+-	dir = CTINFO2DIR(ctinfo);
+-	DEBUGP("nat_h323: 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" : "???");
+-	if (!((hooknum == NF_IP_POST_ROUTING && dir == IP_CT_DIR_ORIGINAL)
+-	      || (hooknum == NF_IP_PRE_ROUTING && dir == IP_CT_DIR_REPLY))) {
+-		DEBUGP("nat_h323: 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" : "???");
+-		return NF_ACCEPT;
+-	}
+-
+-	if (!exp) {
+-		LOCK_BH(&ip_h323_lock);
+-		if (!h323_signal_address_fixup(ct, pskb, ctinfo)) {
+-			UNLOCK_BH(&ip_h323_lock);
+-			return NF_DROP;
+-		}
+-		UNLOCK_BH(&ip_h323_lock);
+-		return NF_ACCEPT;
+-	}
+-		
+-	exp_info = &exp->help.exp_h225_info;
+-
+-	LOCK_BH(&ip_h323_lock);
+-	if (!h323_data_fixup(exp_info, ct, pskb, ctinfo, exp)) {
+-		UNLOCK_BH(&ip_h323_lock);
+-		return NF_DROP;
+-	}
+-	UNLOCK_BH(&ip_h323_lock);
+-
+-	return NF_ACCEPT;
+-}
+-
+-static struct ip_nat_helper h225 = 
+-	{ { NULL, NULL },
+-	  "H.225",					/* name */
+-	  IP_NAT_HELPER_F_ALWAYS, 			/* flags */
+-	  THIS_MODULE,					/* module */
+-	  { { 0, { __constant_htons(H225_PORT) } },	/* tuple */
+-	    { 0, { 0 }, IPPROTO_TCP } },
+-	  { { 0, { 0xFFFF } },				/* mask */
+-	    { 0, { 0 }, 0xFFFF } },
+-	  h225_nat_help,				/* helper */
+-	  h225_nat_expected				/* expectfn */
+-	};
+-
+-static int __init init(void)
+-{
+-	int ret;
+-	
+-	ret = ip_nat_helper_register(&h225);
+-
+-	if (ret != 0)
+-		printk("ip_nat_h323: cannot initialize the module!\n");
+-
+-	return ret;
+-}
+-
+-static void __exit fini(void)
+-{
+-	ip_nat_helper_unregister(&h225);
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_helper.c linux.stock/net/ipv4/netfilter/ip_nat_helper.c
+--- linux/net/ipv4/netfilter/ip_nat_helper.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_helper.c	2004-05-09 04:13:03.000000000 -0400
+@@ -8,9 +8,6 @@
+  *		- add support for SACK adjustment 
+  *	14 Mar 2002 Harald Welte <laforge@gnumonks.org>:
+  *		- merge SACK support into newnat API
+- *	16 Aug 2002 Brian J. Murrell <netfilter@interlinx.bc.ca>:
+- *		- make ip_nat_resize_packet more generic (TCP and UDP)
+- *		- add ip_nat_mangle_udp_packet
+  */
+ #include <linux/version.h>
+ #include <linux/config.h>
+@@ -25,7 +22,6 @@
+ #include <net/icmp.h>
+ #include <net/ip.h>
+ #include <net/tcp.h>
+-#include <net/udp.h>
+ 
+ #define ASSERT_READ_LOCK(x) MUST_BE_READ_LOCKED(&ip_nat_lock)
+ #define ASSERT_WRITE_LOCK(x) MUST_BE_WRITE_LOCKED(&ip_nat_lock)
+@@ -38,8 +34,13 @@
+ #include <linux/netfilter_ipv4/ip_nat_helper.h>
+ #include <linux/netfilter_ipv4/listhelp.h>
+ 
++#if 0
++#define DEBUGP printk
++#define DUMP_OFFSET(x)	printk("offset_before=%d, offset_after=%d, correction_pos=%u\n", x->offset_before, x->offset_after, x->correction_pos);
++#else
+ #define DEBUGP(format, args...)
+ #define DUMP_OFFSET(x)
++#endif
+ 
+ DECLARE_LOCK(ip_nat_seqofs_lock);
+ 			 
+@@ -50,12 +51,18 @@
+ 		     int new_size)
+ {
+ 	struct iphdr *iph;
++	struct tcphdr *tcph;
++	void *data;
+ 	int dir;
+ 	struct ip_nat_seq *this_way, *other_way;
+ 
+ 	DEBUGP("ip_nat_resize_packet: old_size = %u, new_size = %u\n",
+ 		(*skb)->len, new_size);
+ 
++	iph = (*skb)->nh.iph;
++	tcph = (void *)iph + iph->ihl*4;
++	data = (void *)tcph + tcph->doff*4;
++
+ 	dir = CTINFO2DIR(ctinfo);
+ 
+ 	this_way = &ct->nat.info.seq[dir];
+@@ -77,9 +84,8 @@
+ 	}
+ 
+ 	iph = (*skb)->nh.iph;
+-	if (iph->protocol == IPPROTO_TCP) {
+-		struct tcphdr *tcph = (void *)iph + iph->ihl*4;
+-		void *data = (void *)tcph + tcph->doff*4;
++	tcph = (void *)iph + iph->ihl*4;
++	data = (void *)tcph + tcph->doff*4;
+ 
+ 		DEBUGP("ip_nat_resize_packet: Seq_offset before: ");
+ 		DUMP_OFFSET(this_way);
+@@ -95,20 +101,25 @@
+ 			this_way->correction_pos = ntohl(tcph->seq);
+ 			this_way->offset_before = this_way->offset_after;
+ 			this_way->offset_after = (int32_t)
+-				this_way->offset_before + new_size -
+-				(*skb)->len;
++			this_way->offset_before + new_size - (*skb)->len;
+ 		}
+ 
+ 		UNLOCK_BH(&ip_nat_seqofs_lock);
+ 
+ 		DEBUGP("ip_nat_resize_packet: Seq_offset after: ");
+ 		DUMP_OFFSET(this_way);
+-	}
+ 	
+ 	return 1;
+ }
+ 
+ 
++/* Generic function for mangling variable-length address changes inside
++ * NATed connections (like the PORT XXX,XXX,XXX,XXX,XXX,XXX command in FTP).
++ *
++ * Takes care about all the nasty sequence number changes, checksumming,
++ * skb enlargement, ...
++ *
++ * */
+ int 
+ ip_nat_mangle_tcp_packet(struct sk_buff **skb,
+ 			 struct ip_conntrack *ct,
+@@ -163,7 +174,6 @@
+ 	tcph = (void *)iph + iph->ihl*4;
+ 	data = (void *)tcph + tcph->doff*4;
+ 
+-	if (rep_len != match_len)
+ 		/* move post-replacement */
+ 		memmove(data + match_offset + rep_len,
+ 			data + match_offset + match_len,
+@@ -198,104 +208,6 @@
+ 	return 1;
+ }
+ 			
+-int 
+-ip_nat_mangle_udp_packet(struct sk_buff **skb,
+-			 struct ip_conntrack *ct,
+-			 enum ip_conntrack_info ctinfo,
+-			 unsigned int match_offset,
+-			 unsigned int match_len,
+-			 char *rep_buffer,
+-			 unsigned int rep_len)
+-{
+-	struct iphdr *iph = (*skb)->nh.iph;
+-	struct udphdr *udph = (void *)iph + iph->ihl * 4;
+-	unsigned char *data;
+-	u_int32_t udplen, newlen, newudplen;
+-
+-	udplen = (*skb)->len - iph->ihl*4;
+-	newudplen = udplen - match_len + rep_len;
+-	newlen = iph->ihl*4 + newudplen;
+-
+-	if (newlen > 65535) {
+-		if (net_ratelimit())
+-			printk("ip_nat_mangle_udp_packet: nat'ed packet "
+-				"exceeds maximum packet size\n");
+-		return 0;
+-	}
+-
+-	if ((*skb)->len != newlen) {
+-		if (!ip_nat_resize_packet(skb, ct, ctinfo, newlen)) {
+-			printk("resize_packet failed!!\n");
+-			return 0;
+-		}
+-	}
+-
+-	/* Alexey says: if a hook changes _data_ ... it can break
+-	   original packet sitting in tcp queue and this is fatal */
+-	if (skb_cloned(*skb)) {
+-		struct sk_buff *nskb = skb_copy(*skb, GFP_ATOMIC);
+-		if (!nskb) {
+-			if (net_ratelimit())
+-				printk("Out of memory cloning TCP packet\n");
+-			return 0;
+-		}
+-		/* Rest of kernel will get very unhappy if we pass it
+-		   a suddenly-orphaned skbuff */
+-		if ((*skb)->sk)
+-			skb_set_owner_w(nskb, (*skb)->sk);
+-		kfree_skb(*skb);
+-		*skb = nskb;
+-	}
+-
+-	/* skb may be copied !! */
+-	iph = (*skb)->nh.iph;
+-	udph = (void *)iph + iph->ihl*4;
+-	data = (void *)udph + sizeof(struct udphdr);
+-
+-	if (rep_len != match_len)
+-		/* move post-replacement */
+-		memmove(data + match_offset + rep_len,
+-			data + match_offset + match_len,
+-			(*skb)->tail - (data + match_offset + match_len));
+-
+-	/* insert data from buffer */
+-	memcpy(data + match_offset, rep_buffer, rep_len);
+-
+-	/* update skb info */
+-	if (newlen > (*skb)->len) {
+-		DEBUGP("ip_nat_mangle_udp_packet: Extending packet by "
+-			"%u to %u bytes\n", newlen - (*skb)->len, newlen);
+-		skb_put(*skb, newlen - (*skb)->len);
+-	} else {
+-		DEBUGP("ip_nat_mangle_udp_packet: Shrinking packet from "
+-			"%u to %u bytes\n", (*skb)->len, newlen);
+-		skb_trim(*skb, newlen);
+-	}
+-
+-	/* update the length of the UDP and IP packets to the new values*/
+-	udph->len = htons((*skb)->len - iph->ihl*4);
+-	iph->tot_len = htons(newlen);
+-
+-	/* fix udp checksum if udp checksum was previously calculated */
+-	if ((*skb)->csum != 0) {
+-		(*skb)->csum = csum_partial((char *)udph +
+-					    sizeof(struct udphdr),
+-					    newudplen - sizeof(struct udphdr),
+-					    0);
+-
+-		udph->check = 0;
+-		udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
+-						newudplen, IPPROTO_UDP,
+-						csum_partial((char *)udph,
+-							 sizeof(struct udphdr),
+-							(*skb)->csum));
+-	}
+-
+-	ip_send_check(iph);
+-
+-	return 1;
+-}
+-
+ /* Adjust one found SACK option including checksum correction */
+ static void
+ sack_adjust(struct tcphdr *tcph, 
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_mms.c linux.stock/net/ipv4/netfilter/ip_nat_mms.c
+--- linux/net/ipv4/netfilter/ip_nat_mms.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_mms.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,330 +0,0 @@
+-/* MMS extension for TCP NAT alteration.
+- * (C) 2002 by Filip Sneppe <filip.sneppe@cronos.be>
+- * based on ip_nat_ftp.c and ip_nat_irc.c
+- *
+- * ip_nat_mms.c v0.3 2002-09-22
+- *
+- *      This program is free software; you can redistribute it and/or
+- *      modify it under the terms of the GNU General Public License
+- *      as published by the Free Software Foundation; either version
+- *      2 of the License, or (at your option) any later version.
+- *
+- *      Module load syntax:
+- *      insmod ip_nat_mms.o ports=port1,port2,...port<MAX_PORTS>
+- *
+- *      Please give the ports of all MMS servers You wish to connect to.
+- *      If you don't specify ports, the default will be TCP port 1755.
+- *
+- *      More info on MMS protocol, firewalls and NAT:
+- *      http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/MMSFirewall.asp
+- *      http://www.microsoft.com/windows/windowsmedia/serve/firewall.asp
+- *
+- *      The SDP project people are reverse-engineering MMS:
+- *      http://get.to/sdp
+- */
+-
+-
+-#include <linux/module.h>
+-#include <linux/netfilter_ipv4.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_helper.h>
+-#include <linux/netfilter_ipv4/ip_nat_rule.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_mms.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+-
+-#define DEBUGP(format, args...)
+-#define DUMP_BYTES(address, counter)
+-
+-#define MAX_PORTS 8
+-static int ports[MAX_PORTS];
+-static int ports_c = 0;
+-
+-#ifdef MODULE_PARM
+-MODULE_PARM(ports, "1-" __MODULE_STRING(MAX_PORTS) "i");
+-#endif
+-
+-MODULE_AUTHOR("Filip Sneppe <filip.sneppe@cronos.be>");
+-MODULE_DESCRIPTION("Microsoft Windows Media Services (MMS) NAT module");
+-MODULE_LICENSE("GPL");
+-
+-DECLARE_LOCK_EXTERN(ip_mms_lock);
+-
+-
+-static int mms_data_fixup(const struct ip_ct_mms_expect *ct_mms_info,
+-                          struct ip_conntrack *ct,
+-                          struct sk_buff **pskb,
+-                          enum ip_conntrack_info ctinfo,
+-                          struct ip_conntrack_expect *expect)
+-{
+-	u_int32_t newip;
+-	struct ip_conntrack_tuple t;
+-	struct iphdr *iph = (*pskb)->nh.iph;
+-	struct tcphdr *tcph = (void *) iph + iph->ihl * 4;
+-	char *data = (char *)tcph + tcph->doff * 4;
+-	int i, j, k, port;
+-	u_int16_t mms_proto;
+-
+-	u_int32_t *mms_chunkLenLV    = (u_int32_t *)(data + MMS_SRV_CHUNKLENLV_OFFSET);
+-	u_int32_t *mms_chunkLenLM    = (u_int32_t *)(data + MMS_SRV_CHUNKLENLM_OFFSET);
+-	u_int32_t *mms_messageLength = (u_int32_t *)(data + MMS_SRV_MESSAGELENGTH_OFFSET);
+-
+-	int zero_padding;
+-
+-	char buffer[28];         /* "\\255.255.255.255\UDP\65635" * 2 (for unicode) */
+-	char unicode_buffer[75]; /* 27*2 (unicode) + 20 + 1 */
+-	char proto_string[6];
+-	
+-	MUST_BE_LOCKED(&ip_mms_lock);
+-
+-	/* what was the protocol again ? */
+-	mms_proto = expect->tuple.dst.protonum;
+-	sprintf(proto_string, "%u", mms_proto);
+-	
+-	DEBUGP("ip_nat_mms: mms_data_fixup: info (seq %u + %u) in %u, proto %s\n",
+-	       expect->seq, ct_mms_info->len, ntohl(tcph->seq),
+-	       mms_proto == IPPROTO_UDP ? "UDP"
+-	       : mms_proto == IPPROTO_TCP ? "TCP":proto_string);
+-	
+-	newip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-
+-	/* Alter conntrack's expectations. */
+-	t = expect->tuple;
+-	t.dst.ip = newip;
+-	for (port = ct_mms_info->port; port != 0; port++) {
+-		t.dst.u.tcp.port = htons(port);
+-		if (ip_conntrack_change_expect(expect, &t) == 0) {
+-			DEBUGP("ip_nat_mms: mms_data_fixup: using port %d\n", port);
+-			break;
+-		}
+-	}
+-	
+-	if(port == 0)
+-		return 0;
+-
+-	sprintf(buffer, "\\\\%u.%u.%u.%u\\%s\\%u",
+-	        NIPQUAD(newip),
+-		expect->tuple.dst.protonum == IPPROTO_UDP ? "UDP"
+-		: expect->tuple.dst.protonum == IPPROTO_TCP ? "TCP":proto_string,
+-		port);
+-	DEBUGP("ip_nat_mms: new unicode string=%s\n", buffer);
+-	
+-	memset(unicode_buffer, 0, sizeof(char)*75);
+-
+-	for (i=0; i<strlen(buffer); ++i)
+-		*(unicode_buffer+i*2)=*(buffer+i);
+-	
+-	DEBUGP("ip_nat_mms: mms_data_fixup: padding: %u len: %u\n", ct_mms_info->padding, ct_mms_info->len);
+-	DEBUGP("ip_nat_mms: mms_data_fixup: offset: %u\n", MMS_SRV_UNICODE_STRING_OFFSET+ct_mms_info->len);
+-	DUMP_BYTES(data+MMS_SRV_UNICODE_STRING_OFFSET, 60);
+-	
+-	/* add end of packet to it */
+-	for (j=0; j<ct_mms_info->padding; ++j) {
+-		DEBUGP("ip_nat_mms: mms_data_fixup: i=%u j=%u byte=%u\n", 
+-		       i, j, (u8)*(data+MMS_SRV_UNICODE_STRING_OFFSET+ct_mms_info->len+j));
+-		*(unicode_buffer+i*2+j) = *(data+MMS_SRV_UNICODE_STRING_OFFSET+ct_mms_info->len+j);
+-	}
+-
+-	/* pad with zeroes at the end ? see explanation of weird math below */
+-	zero_padding = (8-(strlen(buffer)*2 + ct_mms_info->padding + 4)%8)%8;
+-	for (k=0; k<zero_padding; ++k)
+-		*(unicode_buffer+i*2+j+k)= (char)0;
+-	
+-	DEBUGP("ip_nat_mms: mms_data_fixup: zero_padding = %u\n", zero_padding);
+-	DEBUGP("ip_nat_mms: original=> chunkLenLV=%u chunkLenLM=%u messageLength=%u\n",
+-	       *mms_chunkLenLV, *mms_chunkLenLM, *mms_messageLength);
+-	
+-	/* explanation, before I forget what I did:
+-	   strlen(buffer)*2 + ct_mms_info->padding + 4 must be divisable by 8;
+-	   divide by 8 and add 3 to compute the mms_chunkLenLM field,
+-	   but note that things may have to be padded with zeroes to align by 8 
+-	   bytes, hence we add 7 and divide by 8 to get the correct length */ 
+-	*mms_chunkLenLM    = (u_int32_t) (3+(strlen(buffer)*2+ct_mms_info->padding+11)/8);
+-	*mms_chunkLenLV    = *mms_chunkLenLM+2;
+-	*mms_messageLength = *mms_chunkLenLV*8;
+-	
+-	DEBUGP("ip_nat_mms: modified=> chunkLenLV=%u chunkLenLM=%u messageLength=%u\n",
+-	       *mms_chunkLenLV, *mms_chunkLenLM, *mms_messageLength);
+-	
+-	ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, 
+-	                         expect->seq - ntohl(tcph->seq),
+-	                         ct_mms_info->len + ct_mms_info->padding, unicode_buffer,
+-	                         strlen(buffer)*2 + ct_mms_info->padding + zero_padding);
+-	DUMP_BYTES(unicode_buffer, 60);
+-	
+-	return 1;
+-}
+-
+-static unsigned int
+-mms_nat_expected(struct sk_buff **pskb,
+-                 unsigned int hooknum,
+-                 struct ip_conntrack *ct,
+-                 struct ip_nat_info *info)
+-{
+-	struct ip_nat_multi_range mr;
+-	u_int32_t newdstip, newsrcip, newip;
+-
+-	struct ip_conntrack *master = master_ct(ct);
+-
+-	IP_NF_ASSERT(info);
+-	IP_NF_ASSERT(master);
+-
+-	IP_NF_ASSERT(!(info->initialized & (1 << HOOK2MANIP(hooknum))));
+-
+-	DEBUGP("ip_nat_mms: mms_nat_expected: We have a connection!\n");
+-
+-	newdstip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+-	newsrcip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+-	DEBUGP("ip_nat_mms: mms_nat_expected: hook %s: newsrc->newdst %u.%u.%u.%u->%u.%u.%u.%u\n",
+-	       hooknum == NF_IP_POST_ROUTING ? "POSTROUTING"
+-	       : hooknum == NF_IP_PRE_ROUTING ? "PREROUTING"
+-	       : hooknum == NF_IP_LOCAL_OUT ? "OUTPUT" : "???",
+-	       NIPQUAD(newsrcip), NIPQUAD(newdstip));
+-
+-	if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC)
+-		newip = newsrcip;
+-	else
+-		newip = newdstip;
+-
+-	DEBUGP("ip_nat_mms: mms_nat_expected: IP to %u.%u.%u.%u\n", NIPQUAD(newip));
+-
+-	mr.rangesize = 1;
+-	/* We don't want to manip the per-protocol, just the IPs. */
+-	mr.range[0].flags = IP_NAT_RANGE_MAP_IPS;
+-	mr.range[0].min_ip = mr.range[0].max_ip = newip;
+-
+-	return ip_nat_setup_info(ct, &mr, hooknum);
+-}
+-
+-
+-static unsigned int mms_nat_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;
+-	int dir;
+-	struct ip_ct_mms_expect *ct_mms_info;
+-
+-	if (!exp)
+-		DEBUGP("ip_nat_mms: no exp!!");
+-
+-	ct_mms_info = &exp->help.exp_mms_info;
+-	
+-	/* Only mangle things once: original direction in POST_ROUTING
+-	   and reply direction on PRE_ROUTING. */
+-	dir = CTINFO2DIR(ctinfo);
+-	if (!((hooknum == NF_IP_POST_ROUTING && dir == IP_CT_DIR_ORIGINAL)
+-	    ||(hooknum == NF_IP_PRE_ROUTING && dir == IP_CT_DIR_REPLY))) {
+-		DEBUGP("ip_nat_mms: mms_nat_help: 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" : "???");
+-		return NF_ACCEPT;
+-	}
+-	DEBUGP("ip_nat_mms: mms_nat_help: beyond 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" : "???");
+-	
+-	datalen = (*pskb)->len - iph->ihl * 4 - tcph->doff * 4;
+-	
+-	DEBUGP("ip_nat_mms: mms_nat_help: %u+%u=%u %u %u\n", exp->seq, ct_mms_info->len,
+-	       exp->seq + ct_mms_info->len,
+-	       ntohl(tcph->seq),
+-	       ntohl(tcph->seq) + datalen);
+-	
+-	LOCK_BH(&ip_mms_lock);
+-	/* Check wether the whole IP/proto/port pattern is carried in the payload */
+-	if (between(exp->seq + ct_mms_info->len,
+-	    ntohl(tcph->seq),
+-	    ntohl(tcph->seq) + datalen)) {
+-		if (!mms_data_fixup(ct_mms_info, ct, pskb, ctinfo, exp)) {
+-			UNLOCK_BH(&ip_mms_lock);
+-			return NF_DROP;
+-		}
+-	} else {
+-		/* Half a match?  This means a partial retransmisison.
+-		   It's a cracker being funky. */
+-		if (net_ratelimit()) {
+-			printk("ip_nat_mms: partial packet %u/%u in %u/%u\n",
+-			       exp->seq, ct_mms_info->len,
+-			       ntohl(tcph->seq),
+-			       ntohl(tcph->seq) + datalen);
+-		}
+-		UNLOCK_BH(&ip_mms_lock);
+-		return NF_DROP;
+-	}
+-	UNLOCK_BH(&ip_mms_lock);
+-	
+-	return NF_ACCEPT;
+-}
+-
+-static struct ip_nat_helper mms[MAX_PORTS];
+-static char mms_names[MAX_PORTS][10];
+-
+-/* Not __exit: called from init() */
+-static void fini(void)
+-{
+-	int i;
+-
+-	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
+-		DEBUGP("ip_nat_mms: unregistering helper for port %d\n", ports[i]);
+-		ip_nat_helper_unregister(&mms[i]);
+-	}
+-}
+-
+-static int __init init(void)
+-{
+-	int i, ret = 0;
+-	char *tmpname;
+-
+-	if (ports[0] == 0)
+-		ports[0] = MMS_PORT;
+-
+-	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
+-
+-		memset(&mms[i], 0, sizeof(struct ip_nat_helper));
+-
+-		mms[i].tuple.dst.protonum = IPPROTO_TCP;
+-		mms[i].tuple.src.u.tcp.port = htons(ports[i]);
+-		mms[i].mask.dst.protonum = 0xFFFF;
+-		mms[i].mask.src.u.tcp.port = 0xFFFF;
+-		mms[i].help = mms_nat_help;
+-		mms[i].me = THIS_MODULE;
+-		mms[i].flags = 0;
+-		mms[i].expect = mms_nat_expected;
+-
+-		tmpname = &mms_names[i][0];
+-		if (ports[i] == MMS_PORT)
+-			sprintf(tmpname, "mms");
+-		else
+-			sprintf(tmpname, "mms-%d", i);
+-		mms[i].name = tmpname;
+-
+-		DEBUGP("ip_nat_mms: register helper for port %d\n",
+-				ports[i]);
+-		ret = ip_nat_helper_register(&mms[i]);
+-
+-		if (ret) {
+-			printk("ip_nat_mms: error registering "
+-			       "helper for port %d\n", ports[i]);
+-			fini();
+-			return ret;
+-		}
+-		ports_c++;
+-	}
+-
+-	return ret;
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_pptp.c linux.stock/net/ipv4/netfilter/ip_nat_pptp.c
+--- linux/net/ipv4/netfilter/ip_nat_pptp.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_pptp.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,412 +0,0 @@
+-/*
+- * ip_nat_pptp.c	- Version 1.11
+- *
+- * 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) 2000-2002 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)
+- * 	 - Support other NAT scenarios than SNAT of PNS
+- * 
+- */
+-
+-#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>
+-
+-MODULE_LICENSE("GPL");
+-MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+-MODULE_DESCRIPTION("Netfilter NAT helper module for PPTP");
+-
+-
+-#define DEBUGP(format, args...)
+-
+-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 newsrcip, newdstip, 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 (hooknum == NF_IP_PRE_ROUTING) {
+-		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.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->pns_call_id);
+-		} else {
+-			/* assume PAC->PNS */
+-			DEBUGP("WRONG DIRECTION\n");
+-			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->pns_call_id);
+-		}
+-	}
+-
+-	if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_DST) {
+-		newdstip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+-		newcid = htonl(master->nat.help.nat_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 = newdstip;
+-		mr.range[0].min = mr.range[0].max = 
+-			((union ip_conntrack_manip_proto ) { newcid }); 
+-		DEBUGP("change dest ip to %u.%u.%u.%u\n", 
+-			NIPQUAD(newdstip));
+-		DEBUGP("change dest key to 0x%x\n", ntohl(newcid));
+-		ret = ip_nat_setup_info(ct, &mr, hooknum);
+-	} else {
+-		newsrcip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-		/* nat_multi_range is in network byte order, and GRE tuple
+-		 * is 32 bits, not 16 like callID */
+-		newcid = htonl(master->help.ct_pptp_info.pns_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 = newsrcip;
+-		mr.range[0].min = mr.range[0].max = 
+-			((union ip_conntrack_manip_proto ) { newcid });
+-		DEBUGP("change src ip to %u.%u.%u.%u\n", 
+-			NIPQUAD(newsrcip));
+-		DEBUGP("change 'src' 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 tcphdr *tcph, struct pptp_pkt_hdr *pptph,
+-		  size_t datalen,
+-		  struct ip_conntrack *ct,
+-		  enum ip_conntrack_info ctinfo,
+-		  struct ip_conntrack_expect *exp)
+-
+-{
+-	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;
+-
+-	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;
+-
+-			/* save original call ID in nat_info */
+-			nat_pptp_info->pns_call_id = ct_pptp_info->pns_call_id;
+-
+-			new_callid = tcph->source;
+-			/* 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;
+-		case PPTP_CALL_DISCONNECT_NOTIFY:
+-			cid = &pptpReq.disc->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 */
+-	tcph->check = ip_nat_cheat_check(*cid^0xFFFF, 
+-					 new_callid, tcph->check);
+-	*cid = new_callid;
+-
+-	return NF_ACCEPT;
+-}
+-
+-/* inbound packets == from PAC to PNS */
+-static inline unsigned 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 ip_conntrack_expect *oldexp)
+-{
+-	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;
+-
+-	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;
+-
+-		/* save original PAC call ID in nat_info */
+-		nat_pptp_info->pac_call_id = ct_pptp_info->pac_call_id;
+-
+-		/* store new callID in ct_info, so conntrack works */
+-		//ct_pptp_info->pac_call_id = ntohs(tcph->source);
+-		//new_cid = htons(ct_pptp_info->pac_call_id);
+-
+-		/* alter expectation */
+-		if (t.dst.ip == ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip) {
+-			/* expectation for PNS->PAC direction */
+-			t.dst.u.gre.key = htonl(ct_pptp_info->pac_call_id);
+-			t.src.u.gre.key = htonl(nat_pptp_info->pns_call_id);
+-		} else {
+-			/* expectation for PAC->PNS direction */
+-			t.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-			DEBUGP("EXPECTATION IN WRONG DIRECTION!!!\n");
+-		}
+-
+-		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);
+-		/* reply keymap */
+-		t.src.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
+-		t.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+-		t.src.u.gre.key = htonl(nat_pptp_info->pac_call_id);
+-		t.dst.u.gre.key = htonl(ct_pptp_info->pns_call_id);
+-		ip_ct_gre_keymap_change(oldexp->proto.gre.keymap_reply, &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;
+-	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_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));
+-	tcph->check = ip_nat_cheat_check(*pcid^0xFFFF, 
+-					 new_pcid, tcph->check);
+-	*pcid = 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));
+-		tcph->check = ip_nat_cheat_check(*cid^0xFFFF,
+-						new_cid, tcph->check);
+-		*cid = 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;
+-	void *datalimit;
+-
+-	int dir;
+-
+-	DEBUGP("entering\n");
+-
+-	/* Only mangle things once: original direction in POST_ROUTING
+-	   and reply direction on PRE_ROUTING. */
+-	dir = CTINFO2DIR(ctinfo);
+-	if (!((hooknum == NF_IP_POST_ROUTING && dir == IP_CT_DIR_ORIGINAL)
+-	      || (hooknum == NF_IP_PRE_ROUTING && 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" : "???");
+-		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);
+-	datalimit = (void *) pptph + datalen;
+-
+-	LOCK_BH(&ip_pptp_lock);
+-
+-	if (dir == IP_CT_DIR_ORIGINAL) {
+-		/* reuqests sent by client to server (PNS->PAC) */
+-		pptp_outbound_pkt(tcph, pptph, datalen, ct, ctinfo, exp);
+-	} else {
+-		/* response from the server to the client (PAC->PNS) */
+-		pptp_inbound_pkt(tcph, pptph, datalen, 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 = { 
+-	{ NULL, NULL },
+-	"pptp", IP_NAT_HELPER_F_ALWAYS, THIS_MODULE,
+-	{ { 0, { tcp: { port: __constant_htons(PPTP_CONTROL_PORT) } } },
+-	  { 0, { 0 }, IPPROTO_TCP } },
+-	{ { 0, { tcp: { port: 0xFFFF } } },
+-	  { 0, { 0 }, 0xFFFF } },
+-	tcp_help, pptp_nat_expected };
+-
+-			  
+-static int __init init(void)
+-{
+-	DEBUGP("init_module\n" );
+-
+-        if (ip_nat_helper_register(&pptp_tcp_helper))
+-		return -EIO;
+-
+-        return 0;
+-}
+-
+-static void __exit fini(void)
+-{
+-	DEBUGP("cleanup_module\n" );
+-        ip_nat_helper_unregister(&pptp_tcp_helper);
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_proto_gre.c linux.stock/net/ipv4/netfilter/ip_nat_proto_gre.c
+--- linux/net/ipv4/netfilter/ip_nat_proto_gre.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_proto_gre.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,212 +0,0 @@
+-/*
+- * ip_nat_proto_gre.c - Version 1.11
+- *
+- * 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) 2000-2002 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");
+-
+-#define DEBUGP(x, args...)
+-
+-/* 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)
+-{
+-	return ntohl(tuple->src.u.gre.key) >= ntohl(min->gre.key)
+-		&& ntohl(tuple->src.u.gre.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)) {
+-
+-		switch (tuple->dst.u.gre.version) {
+-		case 0:
+-			DEBUGP("NATing GRE version 0 (ct=%p)\n",
+-				conntrack);
+-			min = 1;
+-			range_size = 0xffffffff;
+-			break;
+-		case GRE_VERSION_PPTP:
+-			DEBUGP("%p: NATing GRE PPTP\n", 
+-				conntrack);
+-			min = 1;
+-			range_size = 0xffff;
+-			break;
+-		default:
+-			printk(KERN_WARNING "nat_gre: unknown GRE version\n");
+-			return 0;
+-			break;
+-		}
+-
+-	} 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) {
+-				*(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->dst.u.gre.version)
+-		len += sprintf(buffer + len, "version=%d ",
+-				ntohs(match->dst.u.gre.version));
+-
+-	if (mask->dst.u.gre.protocol)
+-		len += sprintf(buffer + len, "protocol=0x%x ",
+-				ntohs(match->dst.u.gre.protocol));
+-
+-	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 -Nurb linux/net/ipv4/netfilter/ip_nat_standalone.c linux.stock/net/ipv4/netfilter/ip_nat_standalone.c
+--- linux/net/ipv4/netfilter/ip_nat_standalone.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_standalone.c	2004-05-09 04:13:03.000000000 -0400
+@@ -37,7 +37,11 @@
+ #include <linux/netfilter_ipv4/ip_conntrack_core.h>
+ #include <linux/netfilter_ipv4/listhelp.h>
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ #define HOOKNAME(hooknum) ((hooknum) == NF_IP_POST_ROUTING ? "POST_ROUTING"  \
+ 			   : ((hooknum) == NF_IP_PRE_ROUTING ? "PRE_ROUTING" \
+@@ -354,6 +358,5 @@
+ EXPORT_SYMBOL(ip_nat_helper_unregister);
+ EXPORT_SYMBOL(ip_nat_cheat_check);
+ EXPORT_SYMBOL(ip_nat_mangle_tcp_packet);
+-EXPORT_SYMBOL(ip_nat_mangle_udp_packet);
+ EXPORT_SYMBOL(ip_nat_used_tuple);
+ MODULE_LICENSE("GPL");
+diff -Nurb linux/net/ipv4/netfilter/ip_nat_tftp.c linux.stock/net/ipv4/netfilter/ip_nat_tftp.c
+--- linux/net/ipv4/netfilter/ip_nat_tftp.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_nat_tftp.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,186 +0,0 @@
+-/*
+- * Licensed under GNU GPL version 2 Copyright Magnus Boden <mb@ozaba.mine.nu>
+- * Version: 0.0.7
+- *
+- * Thu 21 Mar 2002 Harald Welte <laforge@gnumonks.org>
+- * 	- Port to newnat API
+- *
+- * This module currently supports DNAT:
+- * iptables -t nat -A PREROUTING -d x.x.x.x -j DNAT --to-dest x.x.x.y
+- *
+- * and SNAT:
+- * iptables -t nat -A POSTROUTING { -j MASQUERADE , -j SNAT --to-source x.x.x.x }
+- *
+- * It has not been tested with
+- * -j SNAT --to-source x.x.x.x-x.x.x.y since I only have one external ip
+- * If you do test this please let me know if it works or not.
+- *
+- */
+-
+-#include <linux/module.h>
+-#include <linux/netfilter_ipv4.h>
+-#include <linux/ip.h>
+-#include <linux/udp.h>
+-
+-#include <linux/netfilter.h>
+-#include <linux/netfilter_ipv4/ip_tables.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+-#include <linux/netfilter_ipv4/ip_conntrack_tftp.h>
+-#include <linux/netfilter_ipv4/ip_nat_helper.h>
+-#include <linux/netfilter_ipv4/ip_nat_rule.h>
+-
+-MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>");
+-MODULE_DESCRIPTION("Netfilter NAT helper for tftp");
+-MODULE_LICENSE("GPL");
+-
+-#define MAX_PORTS 8
+-
+-static int ports[MAX_PORTS];
+-static int ports_c = 0;
+-#ifdef MODULE_PARM
+-MODULE_PARM(ports,"1-" __MODULE_STRING(MAX_PORTS) "i");
+-MODULE_PARM_DESC(ports, "port numbers of tftp servers");
+-#endif
+-
+-#define DEBUGP(format, args...)
+-static unsigned int 
+-tftp_nat_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)
+-{
+-	int dir = CTINFO2DIR(ctinfo);
+-	struct iphdr *iph = (*pskb)->nh.iph;
+-	struct udphdr *udph = (void *)iph + iph->ihl * 4;
+-	struct tftphdr *tftph = (void *)udph + 8;
+-	struct ip_conntrack_tuple repl;
+-
+-	if (!((hooknum == NF_IP_POST_ROUTING && dir == IP_CT_DIR_ORIGINAL)
+-	      || (hooknum == NF_IP_PRE_ROUTING && dir == IP_CT_DIR_REPLY))) 
+-		return NF_ACCEPT;
+-
+-	if (!exp) {
+-		DEBUGP("no conntrack expectation to modify\n");
+-		return NF_ACCEPT;
+-	}
+-
+-	switch (ntohs(tftph->opcode)) {
+-	/* RRQ and WRQ works the same way */
+-	case TFTP_OPCODE_READ:
+-	case TFTP_OPCODE_WRITE:
+-		repl = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+-		DEBUGP("");
+-		DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+-		DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+-		DEBUGP("expecting: ");
+-		DUMP_TUPLE_RAW(&repl);
+-		DUMP_TUPLE_RAW(&exp->mask);
+-		ip_conntrack_change_expect(exp, &repl);
+-		break;
+-	default:
+-		DEBUGP("Unknown opcode\n");
+-	}               
+-
+-	return NF_ACCEPT;
+-}
+-
+-static unsigned int 
+-tftp_nat_expected(struct sk_buff **pskb,
+-		  unsigned int hooknum,
+-		  struct ip_conntrack *ct, 
+-		  struct ip_nat_info *info) 
+-{
+-	const struct ip_conntrack *master = ct->master->expectant;
+-	const struct ip_conntrack_tuple *orig = 
+-			&master->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
+-	struct ip_nat_multi_range mr;
+-
+-	IP_NF_ASSERT(info);
+-	IP_NF_ASSERT(master);
+-	IP_NF_ASSERT(!(info->initialized & (1 << HOOK2MANIP(hooknum))));
+-
+-	mr.rangesize = 1;
+-	mr.range[0].flags = IP_NAT_RANGE_MAP_IPS;
+-
+-	if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC) {
+-		mr.range[0].min_ip = mr.range[0].max_ip = orig->dst.ip; 
+-		DEBUGP("orig: %u.%u.%u.%u:%u <-> %u.%u.%u.%u:%u "
+-			"newsrc: %u.%u.%u.%u\n",
+-                        NIPQUAD((*pskb)->nh.iph->saddr), ntohs(udph->source),
+-			NIPQUAD((*pskb)->nh.iph->daddr), ntohs(udph->dest),
+-			NIPQUAD(orig->dst.ip));
+-	} else {
+-		mr.range[0].min_ip = mr.range[0].max_ip = orig->src.ip;
+-		mr.range[0].min.udp.port = mr.range[0].max.udp.port = 
+-							orig->src.u.udp.port;
+-		mr.range[0].flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+-
+-		DEBUGP("orig: %u.%u.%u.%u:%u <-> %u.%u.%u.%u:%u "
+-			"newdst: %u.%u.%u.%u:%u\n",
+-                        NIPQUAD((*pskb)->nh.iph->saddr), ntohs(udph->source),
+-                        NIPQUAD((*pskb)->nh.iph->daddr), ntohs(udph->dest),
+-                        NIPQUAD(orig->src.ip), ntohs(orig->src.u.udp.port));
+-	}
+-
+-	return ip_nat_setup_info(ct,&mr,hooknum);
+-}
+-
+-static struct ip_nat_helper tftp[MAX_PORTS];
+-static char tftp_names[MAX_PORTS][10];
+-
+-static void fini(void)
+-{
+-	int i;
+-
+-	for (i = 0 ; i < ports_c; i++) {
+-		DEBUGP("unregistering helper for port %d\n", ports[i]);
+-		ip_nat_helper_unregister(&tftp[i]);
+-	}
+-}
+-
+-static int __init init(void)
+-{
+-	int i, ret;
+-	char *tmpname;
+-
+-	if (!ports[0])
+-		ports[0] = TFTP_PORT;
+-
+-	for (i = 0 ; (i < MAX_PORTS) && ports[i] ; i++) {
+-		memset(&tftp[i], 0, sizeof(struct ip_nat_helper));
+-
+-		tftp[i].tuple.dst.protonum = IPPROTO_UDP;
+-		tftp[i].tuple.src.u.udp.port = htons(ports[i]);
+-		tftp[i].mask.dst.protonum = 0xFFFF;
+-		tftp[i].mask.src.u.udp.port = 0xFFFF;
+-		tftp[i].help = tftp_nat_help;
+-		tftp[i].flags = 0;
+-		tftp[i].me = THIS_MODULE;
+-		tftp[i].expect = tftp_nat_expected;
+-
+-		tmpname = &tftp_names[i][0];
+-		if (ports[i] == TFTP_PORT)
+-			sprintf(tmpname, "tftp");
+-		else
+-			sprintf(tmpname, "tftp-%d", i);
+-		tftp[i].name = tmpname;
+-		
+-		DEBUGP("ip_nat_tftp: registering for port %d: name %s\n",
+-			ports[i], tftp[i].name);
+-		ret = ip_nat_helper_register(&tftp[i]);
+-
+-		if (ret) {
+-			printk("ip_nat_tftp: unable to register for port %d\n",
+-				ports[i]);
+-			fini();
+-			return ret;
+-		}
+-		ports_c++;
+-	}
+-	return ret;
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_pool.c linux.stock/net/ipv4/netfilter/ip_pool.c
+--- linux/net/ipv4/netfilter/ip_pool.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_pool.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,328 +0,0 @@
+-/* Kernel module for IP pool management */
+-
+-#include <linux/module.h>
+-#include <linux/ip.h>
+-#include <linux/skbuff.h>
+-#include <linux/netfilter_ipv4/ip_tables.h>
+-#include <linux/netfilter_ipv4/ip_pool.h>
+-#include <linux/errno.h>
+-#include <asm/uaccess.h>
+-#include <asm/bitops.h>
+-#include <linux/interrupt.h>
+-#include <linux/spinlock.h>
+-
+-#define DP(format, args...)
+-
+-MODULE_LICENSE("GPL");
+-
+-#define NR_POOL 16
+-static int nr_pool = NR_POOL;/* overwrite this when loading module */
+-
+-struct ip_pool {
+-	u_int32_t first_ip;	/* host byte order, included in range */
+-	u_int32_t last_ip;	/* host byte order, included in range */
+-	void *members;		/* the bitmap proper */
+-	int nr_use;		/* total nr. of tests through this */
+-	int nr_match;		/* total nr. of matches through this */
+-	rwlock_t lock;
+-};
+-
+-static struct ip_pool *POOL;
+-
+-static inline struct ip_pool *lookup(ip_pool_t index)
+-{
+-	if (index < 0 || index >= nr_pool) {
+-		DP("ip_pool:lookup: bad index %d\n", index);
+-		return 0;
+-	}
+-	return POOL+index;
+-}
+-
+-int ip_pool_match(ip_pool_t index, u_int32_t addr)
+-{
+-        struct ip_pool *pool = lookup(index);
+-	int res = 0;
+-
+-	if (!pool || !pool->members)
+-		return 0;
+-	read_lock_bh(&pool->lock);
+-	if (pool->members) {
+-		if (addr >= pool->first_ip && addr <= pool->last_ip) {
+-			addr -= pool->first_ip;
+-			if (test_bit(addr, pool->members)) {
+-				res = 1;
+-#ifdef CONFIG_IP_POOL_STATISTICS
+-				pool->nr_match++;
+-#endif
+-			}
+-		}
+-#ifdef CONFIG_IP_POOL_STATISTICS
+-		pool->nr_use++;
+-#endif
+-	}
+-	read_unlock_bh(&pool->lock);
+-	return res;
+-}
+-
+-static int pool_change(ip_pool_t index, u_int32_t addr, int isdel)
+-{
+-	struct ip_pool *pool;
+-	int res = -1;
+-
+-	pool = lookup(index);
+-	if (    !pool || !pool->members
+-	     || addr < pool->first_ip || addr > pool->last_ip)
+-		return -1;
+-	read_lock_bh(&pool->lock);
+-	if (pool->members && addr >= pool->first_ip && addr <= pool->last_ip) {
+-		addr -= pool->first_ip;
+-		res = isdel
+-			? (0 != test_and_clear_bit(addr, pool->members))
+-			: (0 != test_and_set_bit(addr, pool->members));
+-	}
+-	read_unlock_bh(&pool->lock);
+-	return res;
+-}
+-
+-int ip_pool_mod(ip_pool_t index, u_int32_t addr, int isdel)
+-{
+-	int res = pool_change(index,addr,isdel);
+-
+-	if (!isdel) res = !res;
+-	return res;
+-}
+-
+-static inline int bitmap_bytes(u_int32_t a, u_int32_t b)
+-{
+-	return 4*((((b-a+8)/8)+3)/4);
+-}
+-
+-static inline int poolbytes(ip_pool_t index)
+-{
+-	struct ip_pool *pool = lookup(index);
+-
+-	return pool ? bitmap_bytes(pool->first_ip, pool->last_ip) : 0;
+-}
+-
+-static int setpool(
+-	struct sock *sk,
+-	int optval,
+-	void *user,
+-	unsigned int len
+-) {
+-	struct ip_pool_request req;
+-
+-	DP("ip_pool:setpool: optval=%d, user=%p, len=%d\n", optval, user, len);
+-	if (!capable(CAP_NET_ADMIN))
+-		return -EPERM;
+-	if (optval != SO_IP_POOL)
+-		return -EBADF;
+-	if (len != sizeof(req))
+-		return -EINVAL;
+-	if (copy_from_user(&req, user, sizeof(req)) != 0)
+-		return -EFAULT;
+-	printk("obsolete op - upgrade your ippool(8) utility.\n");
+-	return -EINVAL;
+-}
+-
+-static int getpool(
+-	struct sock *sk,
+-	int optval,
+-	void *user,
+-	int *len
+-) {
+-	struct ip_pool_request req;
+-	struct ip_pool *pool;
+-	ip_pool_t i;
+-	int newbytes;
+-	void *newmembers;
+-	int res;
+-
+-	DP("ip_pool:getpool: optval=%d, user=%p\n", optval, user);
+-	if (!capable(CAP_NET_ADMIN))
+-		return -EINVAL;
+-	if (optval != SO_IP_POOL)
+-		return -EINVAL;
+-	if (*len != sizeof(req)) {
+-		return -EFAULT;
+-	}
+-	if (copy_from_user(&req, user, sizeof(req)) != 0)
+-		return -EFAULT;
+-	DP("ip_pool:getpool op=%d, index=%d\n", req.op, req.index);
+-	if (req.op < IP_POOL_BAD001) {
+-		printk("obsolete op - upgrade your ippool(8) utility.\n");
+-		return -EFAULT;
+-	}
+-	switch(req.op) {
+-	case IP_POOL_HIGH_NR:
+-		DP("ip_pool HIGH_NR\n");
+-		req.index = IP_POOL_NONE;
+-		for (i=0; i<nr_pool; i++)
+-			if (POOL[i].members)
+-				req.index = i;
+-		return copy_to_user(user, &req, sizeof(req));
+-	case IP_POOL_LOOKUP:
+-		DP("ip_pool LOOKUP\n");
+-		pool = lookup(req.index);
+-		if (!pool)
+-			return -EINVAL;
+-		if (!pool->members)
+-			return -EBADF;
+-		req.addr = htonl(pool->first_ip);
+-		req.addr2 = htonl(pool->last_ip);
+-		return copy_to_user(user, &req, sizeof(req));
+-	case IP_POOL_USAGE:
+-		DP("ip_pool USE\n");
+-		pool = lookup(req.index);
+-		if (!pool)
+-			return -EINVAL;
+-		if (!pool->members)
+-			return -EBADF;
+-		req.addr = pool->nr_use;
+-		req.addr2 = pool->nr_match;
+-		return copy_to_user(user, &req, sizeof(req));
+-	case IP_POOL_TEST_ADDR:
+-		DP("ip_pool TEST 0x%08x\n", req.addr);
+-		pool = lookup(req.index);
+-		if (!pool)
+-			return -EINVAL;
+-		res = 0;
+-		read_lock_bh(&pool->lock);
+-		if (!pool->members) {
+-			DP("ip_pool TEST_ADDR no members in pool\n");
+-			res = -EBADF;
+-			goto unlock_and_return_res;
+-		}
+-		req.addr = ntohl(req.addr);
+-		if (req.addr < pool->first_ip) {
+-			DP("ip_pool TEST_ADDR address < pool bounds\n");
+-			res = -ERANGE;
+-			goto unlock_and_return_res;
+-		}
+-		if (req.addr > pool->last_ip) {
+-			DP("ip_pool TEST_ADDR address > pool bounds\n");
+-			res = -ERANGE;
+-			goto unlock_and_return_res;
+-		}
+-		req.addr = (0 != test_bit((req.addr - pool->first_ip),
+-					pool->members));
+-		read_unlock_bh(&pool->lock);
+-		return copy_to_user(user, &req, sizeof(req));
+-	case IP_POOL_FLUSH:
+-		DP("ip_pool FLUSH not yet implemented.\n");
+-		return -EBUSY;
+-	case IP_POOL_DESTROY:
+-		DP("ip_pool DESTROY not yet implemented.\n");
+-		return -EBUSY;
+-	case IP_POOL_INIT:
+-		DP("ip_pool INIT 0x%08x-0x%08x\n", req.addr, req.addr2);
+-		pool = lookup(req.index);
+-		if (!pool)
+-			return -EINVAL;
+-		req.addr = ntohl(req.addr);
+-		req.addr2 = ntohl(req.addr2);
+-		if (req.addr > req.addr2) {
+-			DP("ip_pool INIT bad ip range\n");
+-			return -EINVAL;
+-		}
+-		newbytes = bitmap_bytes(req.addr, req.addr2);
+-		newmembers = kmalloc(newbytes, GFP_KERNEL);
+-		if (!newmembers) {
+-			DP("ip_pool INIT out of mem for %d bytes\n", newbytes);
+-			return -ENOMEM;
+-		}
+-		memset(newmembers, 0, newbytes);
+-		write_lock_bh(&pool->lock);
+-		if (pool->members) {
+-			DP("ip_pool INIT pool %d exists\n", req.index);
+-			kfree(newmembers);
+-			res = -EBUSY;
+-			goto unlock_and_return_res;
+-		}
+-		pool->first_ip = req.addr;
+-		pool->last_ip = req.addr2;
+-		pool->nr_use = 0;
+-		pool->nr_match = 0;
+-		pool->members = newmembers;
+-		write_unlock_bh(&pool->lock);
+-		return 0;
+-	case IP_POOL_ADD_ADDR:
+-		DP("ip_pool ADD_ADDR 0x%08x\n", req.addr);
+-		req.addr = pool_change(req.index, ntohl(req.addr), 0);
+-		return copy_to_user(user, &req, sizeof(req));
+-	case IP_POOL_DEL_ADDR:
+-		DP("ip_pool DEL_ADDR 0x%08x\n", req.addr);
+-		req.addr = pool_change(req.index, ntohl(req.addr), 1);
+-		return copy_to_user(user, &req, sizeof(req));
+-	default:
+-		DP("ip_pool:getpool bad op %d\n", req.op);
+-		return -EINVAL;
+-	}
+-	return -EINVAL;
+-
+-unlock_and_return_res:
+-	if (pool)
+-		read_unlock_bh(&pool->lock);
+-	return res;
+-}
+-
+-static struct nf_sockopt_ops so_pool
+-= { { NULL, NULL }, PF_INET,
+-    SO_IP_POOL, SO_IP_POOL+1, &setpool,
+-    SO_IP_POOL, SO_IP_POOL+1, &getpool,
+-    0, NULL };
+-
+-MODULE_PARM(nr_pool, "i");
+-
+-static int __init init(void)
+-{
+-	ip_pool_t i;
+-	int res;
+-
+-	if (nr_pool < 1) {
+-		printk("ip_pool module init: bad nr_pool %d\n", nr_pool);
+-		return -EINVAL;
+-	}
+-	POOL = kmalloc(nr_pool * sizeof(*POOL), GFP_KERNEL);
+-	if (!POOL) {
+-		printk("ip_pool module init: out of memory for nr_pool %d\n",
+-			nr_pool);
+-		return -ENOMEM;
+-	}
+-	for (i=0; i<nr_pool; i++) {
+-		POOL[i].first_ip = 0;
+-		POOL[i].last_ip = 0;
+-		POOL[i].members = 0;
+-		POOL[i].nr_use = 0;
+-		POOL[i].nr_match = 0;
+-		POOL[i].lock = RW_LOCK_UNLOCKED;
+-	}
+-	res = nf_register_sockopt(&so_pool);
+-	DP("ip_pool:init %d pools, result %d\n", nr_pool, res);
+-	if (res != 0) {
+-		kfree(POOL);
+-		POOL = 0;
+-	}
+-	return res;
+-}
+-
+-static void __exit fini(void)
+-{
+-	ip_pool_t i;
+-
+-	DP("ip_pool:fini BYEBYE\n");
+-	nf_unregister_sockopt(&so_pool);
+-	for (i=0; i<nr_pool; i++) {
+-		if (POOL[i].members) {
+-			kfree(POOL[i].members);
+-			POOL[i].members = 0;
+-		}
+-	}
+-	kfree(POOL);
+-	POOL = 0;
+-	DP("ip_pool:fini these are the famous last words\n");
+-	return;
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv4/netfilter/ip_tables.c linux.stock/net/ipv4/netfilter/ip_tables.c
+--- linux/net/ipv4/netfilter/ip_tables.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ip_tables.c	2004-05-09 04:13:03.000000000 -0400
+@@ -62,6 +62,11 @@
+ #include <linux/netfilter_ipv4/lockhelp.h>
+ #include <linux/netfilter_ipv4/listhelp.h>
+ 
++#if 0
++/* All the better to debug you with... */
++#define static
++#define inline
++#endif
+ 
+ /* Locking is simple: we assume at worst case there will be one packet
+    in user context and one from bottom halves (or soft irq if Alexey's
+@@ -83,6 +88,7 @@
+ {
+ 	/* Size per table */
+ 	unsigned int size;
++	/* Number of entries: FIXME. --RR */
+ 	unsigned int number;
+ 	/* Initial number of entries. Needed for module usage count */
+ 	unsigned int initial_entries;
+@@ -106,6 +112,11 @@
+ #define TABLE_OFFSET(t,p) 0
+ #endif
+ 
++#if 0
++#define down(x) do { printk("DOWN:%u:" #x "\n", __LINE__); down(x); } while(0)
++#define down_interruptible(x) ({ int __r; printk("DOWNi:%u:" #x "\n", __LINE__); __r = down_interruptible(x); if (__r != 0) printk("ABORT-DOWNi:%u\n", __LINE__); __r; })
++#define up(x) do { printk("UP:%u:" #x "\n", __LINE__); up(x); } while(0)
++#endif
+ 
+ /* Returns whether matches rule or not. */
+ static inline int
+@@ -408,6 +419,12 @@
+ {
+ 	void *ret;
+ 
++#if 0
++	duprintf("find_inlist: searching for `%s' in %s.\n",
++		 name, head == &ipt_target ? "ipt_target"
++		 : head == &ipt_match ? "ipt_match"
++		 : head == &ipt_tables ? "ipt_tables" : "UNKNOWN");
++#endif
+ 
+ 	*error = down_interruptible(mutex);
+ 	if (*error != 0)
+@@ -745,6 +762,8 @@
+ 			newinfo->underflow[h] = underflows[h];
+ 	}
+ 
++	/* FIXME: underflows must be unconditional, standard verdicts
++           < 0 (not IPT_RETURN). --RR */
+ 
+ 	/* Clear counters and comefrom */
+ 	e->counters = ((struct ipt_counters) { 0, 0 });
+@@ -957,6 +976,7 @@
+ 		goto free_counters;
+ 	}
+ 
++	/* FIXME: use iterator macros --RR */
+ 	/* ... then go back and fix counters and names */
+ 	for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
+ 		unsigned int i;
+@@ -1134,6 +1154,14 @@
+ 		     const struct ipt_counters addme[],
+ 		     unsigned int *i)
+ {
++#if 0
++	duprintf("add_counter: Entry %u %lu/%lu + %lu/%lu\n",
++		 *i,
++		 (long unsigned int)e->counters.pcnt,
++		 (long unsigned int)e->counters.bcnt,
++		 (long unsigned int)addme[*i].pcnt,
++		 (long unsigned int)addme[*i].bcnt);
++#endif
+ 
+ 	ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt);
+ 
+@@ -1495,6 +1523,7 @@
+ 		return 0;
+ 	}
+ 
++	/* FIXME: Try tcp doff >> packet len against various stacks --RR */
+ 
+ #define FWINVTCP(bool,invflg) ((bool) ^ !!(tcpinfo->invflags & invflg))
+ 
+@@ -1670,15 +1699,14 @@
+ = { { NULL, NULL }, "icmp", &icmp_match, &icmp_checkentry, NULL };
+ 
+ #ifdef CONFIG_PROC_FS
+-static inline int print_name(const char *i,
++static inline int print_name(const struct ipt_table *t,
+ 			     off_t start_offset, char *buffer, int length,
+ 			     off_t *pos, unsigned int *count)
+ {
+ 	if ((*count)++ >= start_offset) {
+ 		unsigned int namelen;
+ 
+-		namelen = sprintf(buffer + *pos, "%s\n",
+-				  i + sizeof(struct list_head));
++		namelen = sprintf(buffer + *pos, "%s\n", t->name);
+ 		if (*pos + namelen > length) {
+ 			/* Stop iterating */
+ 			return 1;
+@@ -1696,7 +1724,7 @@
+ 	if (down_interruptible(&ipt_mutex) != 0)
+ 		return 0;
+ 
+-	LIST_FIND(&ipt_tables, print_name, void *,
++	LIST_FIND(&ipt_tables, print_name, struct ipt_table *,
+ 		  offset, buffer, length, &pos, &count);
+ 
+ 	up(&ipt_mutex);
+@@ -1705,46 +1733,6 @@
+ 	*start=(char *)((unsigned long)count-offset);
+ 	return pos;
+ }
+-
+-static int ipt_get_targets(char *buffer, char **start, off_t offset, int length)
+-{
+-	off_t pos = 0;
+-	unsigned int count = 0;
+-
+-	if (down_interruptible(&ipt_mutex) != 0)
+-		return 0;
+-
+-	LIST_FIND(&ipt_target, print_name, void *,
+-		  offset, buffer, length, &pos, &count);
+-	
+-	up(&ipt_mutex);
+-
+-	*start = (char *)((unsigned long)count - offset);
+-	return pos;
+-}
+-
+-static int ipt_get_matches(char *buffer, char **start, off_t offset, int length)
+-{
+-	off_t pos = 0;
+-	unsigned int count = 0;
+-
+-	if (down_interruptible(&ipt_mutex) != 0)
+-		return 0;
+-	
+-	LIST_FIND(&ipt_match, print_name, void *,
+-		  offset, buffer, length, &pos, &count);
+-
+-	up(&ipt_mutex);
+-
+-	*start = (char *)((unsigned long)count - offset);
+-	return pos;
+-}
+-
+-static struct { char *name; get_info_t *get_info; } ipt_proc_entry[] =
+-{ { "ip_tables_names", ipt_get_tables },
+-  { "ip_tables_targets", ipt_get_targets },
+-  { "ip_tables_matches", ipt_get_matches },
+-  { NULL, NULL} };
+ #endif /*CONFIG_PROC_FS*/
+ 
+ static int __init init(void)
+@@ -1770,20 +1758,14 @@
+ #ifdef CONFIG_PROC_FS
+ 	{
+ 	struct proc_dir_entry *proc;
+-	int i;
+ 
+-	for (i = 0; ipt_proc_entry[i].name; i++) {
+-		proc = proc_net_create(ipt_proc_entry[i].name, 0,
+-				       ipt_proc_entry[i].get_info);
++	proc = proc_net_create("ip_tables_names", 0, ipt_get_tables);
+ 		if (!proc) {
+-			while (--i >= 0)
+-				proc_net_remove(ipt_proc_entry[i].name);
+ 			nf_unregister_sockopt(&ipt_sockopts);
+ 			return -ENOMEM;
+ 		}
+ 		proc->owner = THIS_MODULE;
+ 	}
+-	}
+ #endif
+ 
+ 	printk("ip_tables: (C) 2000-2002 Netfilter core team\n");
+@@ -1794,11 +1776,7 @@
+ {
+ 	nf_unregister_sockopt(&ipt_sockopts);
+ #ifdef CONFIG_PROC_FS
+-	{
+-	int i;
+-	for (i = 0; ipt_proc_entry[i].name; i++)
+-		proc_net_remove(ipt_proc_entry[i].name);
+-	}
++	proc_net_remove("ip_tables_names");
+ #endif
+ }
+ 
+diff -Nurb linux/net/ipv4/netfilter/ipchains_core.c linux.stock/net/ipv4/netfilter/ipchains_core.c
+--- linux/net/ipv4/netfilter/ipchains_core.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipchains_core.c	2004-05-09 04:13:03.000000000 -0400
+@@ -977,10 +977,17 @@
+ 		    || ftmp->ipfw.fw_dst.s_addr!=frwl->ipfw.fw_dst.s_addr
+ 		    || ftmp->ipfw.fw_smsk.s_addr!=frwl->ipfw.fw_smsk.s_addr
+ 		    || ftmp->ipfw.fw_dmsk.s_addr!=frwl->ipfw.fw_dmsk.s_addr
++#if 0
++		    || ftmp->ipfw.fw_flg!=frwl->ipfw.fw_flg
++#else
+ 		    || ((ftmp->ipfw.fw_flg & ~IP_FW_F_MARKABS)
+ 			!= (frwl->ipfw.fw_flg & ~IP_FW_F_MARKABS))
++#endif
+ 		    || ftmp->ipfw.fw_invflg!=frwl->ipfw.fw_invflg
+ 		    || ftmp->ipfw.fw_proto!=frwl->ipfw.fw_proto
++#if 0
++		    || ftmp->ipfw.fw_mark!=frwl->ipfw.fw_mark
++#endif
+ 		    || ftmp->ipfw.fw_redirpt!=frwl->ipfw.fw_redirpt
+ 		    || ftmp->ipfw.fw_spts[0]!=frwl->ipfw.fw_spts[0]
+ 		    || ftmp->ipfw.fw_spts[1]!=frwl->ipfw.fw_spts[1]
+@@ -1566,6 +1573,7 @@
+ 	)
+ {
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,29)
++	/* FIXME: No more `atomic' read and reset.  Wonderful 8-( --RR */
+ 	int reset = 0;
+ #endif
+ 	struct ip_chain *i;
+diff -Nurb linux/net/ipv4/netfilter/ipfwadm_core.c linux.stock/net/ipv4/netfilter/ipfwadm_core.c
+--- linux/net/ipv4/netfilter/ipfwadm_core.c	2003-10-14 04:09:33.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipfwadm_core.c	2004-05-09 04:13:03.000000000 -0400
+@@ -20,7 +20,7 @@
+  *	license in recognition of the original copyright.
+  *				-- Alan Cox.
+  *
+- *	$Id: ipfwadm_core.c,v 1.1.1.4 2003/10/14 08:09:33 sparq Exp $
++ *	$Id: ipfwadm_core.c,v 1.9.2.2 2002/01/24 15:50:42 davem Exp $
+  *
+  *	Ported from BSD to Linux,
+  *		Alan Cox 22/Nov/1994.
+@@ -1205,6 +1205,7 @@
+ 	)
+ {
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,29)
++	/* FIXME: No more `atomic' read and reset.  Wonderful 8-( --RR */
+ 	int reset = 0;
+ #endif
+ 	return ip_chain_procinfo(IP_FW_ACCT, buffer,start, offset,length,
+@@ -1223,6 +1224,7 @@
+ 	)
+ {
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,29)
++	/* FIXME: No more `atomic' read and reset.  Wonderful 8-( --RR */
+ 	int reset = 0;
+ #endif
+ 	return ip_chain_procinfo(IP_FW_IN, buffer,start,offset,length,
+@@ -1237,6 +1239,7 @@
+ 	)
+ {
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,29)
++	/* FIXME: No more `atomic' read and reset.  Wonderful 8-( --RR */
+ 	int reset = 0;
+ #endif
+ 	return ip_chain_procinfo(IP_FW_OUT, buffer,start,offset,length,
+@@ -1251,6 +1254,7 @@
+ 	)
+ {
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,29)
++	/* FIXME: No more `atomic' read and reset.  Wonderful 8-( --RR */
+ 	int reset = 0;
+ #endif
+ 	return ip_chain_procinfo(IP_FW_FWD, buffer,start,offset,length,
+diff -Nurb linux/net/ipv4/netfilter/ipt_ECN.c linux.stock/net/ipv4/netfilter/ipt_ECN.c
+--- linux/net/ipv4/netfilter/ipt_ECN.c	2003-10-14 04:02:57.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipt_ECN.c	2004-05-09 04:13:03.000000000 -0400
+@@ -87,8 +87,8 @@
+ 	}
+ 	
+ 	if (diffs[0] != *tcpflags) {
+-		diffs[0] = diffs[0] ^ 0xFFFF;
+-		diffs[1] = *tcpflags;
++		diffs[0] = htons(diffs[0]) ^ 0xFFFF;
++		diffs[1] = htons(*tcpflags);
+ 		tcph->check = csum_fold(csum_partial((char *)diffs,
+ 		                                    sizeof(diffs),
+ 		                                    tcph->check^0xFFFF));
+diff -Nurb linux/net/ipv4/netfilter/ipt_LOG.c linux.stock/net/ipv4/netfilter/ipt_LOG.c
+--- linux/net/ipv4/netfilter/ipt_LOG.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipt_LOG.c	2004-05-09 04:13:03.000000000 -0400
+@@ -14,11 +14,15 @@
+ #include <net/route.h>
+ #include <linux/netfilter_ipv4/ipt_LOG.h>
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ struct esphdr {
+ 	__u32   spi;
+-}; 
++}; /* FIXME evil kludge */
+         
+ /* Use lock to serialize, so printks don't overlap */
+ static spinlock_t log_lock = SPIN_LOCK_UNLOCKED;
+diff -Nurb linux/net/ipv4/netfilter/ipt_REJECT.c linux.stock/net/ipv4/netfilter/ipt_REJECT.c
+--- linux/net/ipv4/netfilter/ipt_REJECT.c	2003-07-04 04:12:31.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipt_REJECT.c	2004-05-09 04:13:03.000000000 -0400
+@@ -6,8 +6,6 @@
+ #include <linux/module.h>
+ #include <linux/skbuff.h>
+ #include <linux/ip.h>
+-#include <linux/udp.h>
+-#include <linux/icmp.h>
+ #include <net/icmp.h>
+ #include <net/ip.h>
+ #include <net/tcp.h>
+@@ -16,7 +14,11 @@
+ #include <linux/netfilter_ipv4/ip_tables.h>
+ #include <linux/netfilter_ipv4/ipt_REJECT.h>
+ 
++#if 0
++#define DEBUGP printk
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ /* If the original packet is part of a connection, but the connection
+    is not confirmed, our manufactured reply will not be associated
+@@ -155,7 +157,6 @@
+ static void send_unreach(struct sk_buff *skb_in, int code)
+ {
+ 	struct iphdr *iph;
+-	struct udphdr *udph;
+ 	struct icmphdr *icmph;
+ 	struct sk_buff *nskb;
+ 	u32 saddr;
+@@ -167,6 +168,7 @@
+ 	if (!rt)
+ 		return;
+ 
++	/* FIXME: Use sysctl number. --RR */
+ 	if (!xrlim_allow(&rt->u.dst, 1*HZ))
+ 		return;
+ 
+@@ -184,19 +186,6 @@
+ 	if (iph->frag_off&htons(IP_OFFSET))
+ 		return;
+ 
+-	/* if UDP checksum is set, verify it's correct */
+-	if (iph->protocol == IPPROTO_UDP
+-	    && skb_in->tail-(u8*)iph >= sizeof(struct udphdr)) {
+-		int datalen = skb_in->len - (iph->ihl<<2);
+-		udph = (struct udphdr *)((char *)iph + (iph->ihl<<2));
+-		if (udph->check
+-		    && csum_tcpudp_magic(iph->saddr, iph->daddr,
+-		                         datalen, IPPROTO_UDP,
+-		                         csum_partial((char *)udph, datalen,
+-		                                      0)) != 0)
+-			return;
+-	}
+-		    
+ 	/* If we send an ICMP error to an ICMP error a mess would result.. */
+ 	if (iph->protocol == IPPROTO_ICMP
+ 	    && skb_in->tail-(u8*)iph >= sizeof(struct icmphdr)) {
+@@ -271,6 +260,7 @@
+ 	/* Copy as much of original packet as will fit */
+ 	data = skb_put(nskb,
+ 		       length - sizeof(struct iphdr) - sizeof(struct icmphdr));
++	/* FIXME: won't work with nonlinear skbs --RR */
+ 	memcpy(data, skb_in->nh.iph,
+ 	       length - sizeof(struct iphdr) - sizeof(struct icmphdr));
+ 	icmph->checksum = ip_compute_csum((unsigned char *)icmph,
+diff -Nurb linux/net/ipv4/netfilter/ipt_ULOG.c linux.stock/net/ipv4/netfilter/ipt_ULOG.c
+--- linux/net/ipv4/netfilter/ipt_ULOG.c	2003-07-04 04:12:32.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipt_ULOG.c	2004-05-09 04:13:03.000000000 -0400
+@@ -12,7 +12,6 @@
+  * 	      module loadtime -HW
+  * 2002/07/07 remove broken nflog_rcv() function -HW
+  * 2002/08/29 fix shifted/unshifted nlgroup bug -HW
+- * 2002/10/30 fix uninitialized mac_len field - <Anders K. Pedersen>
+  *
+  * Released under the terms of the GPL
+  *
+@@ -32,7 +31,7 @@
+  *   Specify, after how many clock ticks (intel: 100 per second) the queue
+  * should be flushed even if it is not full yet.
+  *
+- * ipt_ULOG.c,v 1.22 2002/10/30 09:07:31 laforge Exp
++ * ipt_ULOG.c,v 1.21 2002/08/29 10:54:34 laforge Exp
+  */
+ 
+ #include <linux/module.h>
+@@ -60,7 +59,12 @@
+ #define ULOG_NL_EVENT		111		/* Harald's favorite number */
+ #define ULOG_MAXNLGROUPS	32		/* numer of nlgroups */
+ 
++#if 0
++#define DEBUGP(format, args...)	printk(__FILE__ ":" __FUNCTION__ ":" \
++				       format, ## args)
++#else
+ #define DEBUGP(format, args...)
++#endif
+ 
+ #define PRINTR(format, args...) do { if (net_ratelimit()) printk(format, ## args); } while (0)
+ 
+@@ -220,8 +224,7 @@
+ 	    && in->hard_header_len <= ULOG_MAC_LEN) {
+ 		memcpy(pm->mac, (*pskb)->mac.raw, in->hard_header_len);
+ 		pm->mac_len = in->hard_header_len;
+-	} else
+-		pm->mac_len = 0;
++	}
+ 
+ 	if (in)
+ 		strncpy(pm->indev_name, in->name, sizeof(pm->indev_name));
+diff -Nurb linux/net/ipv4/netfilter/ipt_multiport.c linux.stock/net/ipv4/netfilter/ipt_multiport.c
+--- linux/net/ipv4/netfilter/ipt_multiport.c	2003-07-04 04:12:32.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipt_multiport.c	2004-05-09 04:13:03.000000000 -0400
+@@ -8,7 +8,11 @@
+ #include <linux/netfilter_ipv4/ipt_multiport.h>
+ #include <linux/netfilter_ipv4/ip_tables.h>
+ 
++#if 0
++#define duprintf(format, args...) printk(format , ## args)
++#else
+ #define duprintf(format, args...)
++#endif
+ 
+ /* Returns 1 if the port is matched by the test, 0 otherwise. */
+ static inline int
+@@ -74,7 +78,7 @@
+ 
+ 	/* Must specify proto == TCP/UDP, no unknown flags or bad count */
+ 	return (ip->proto == IPPROTO_TCP || ip->proto == IPPROTO_UDP)
+-		&& !(ip->invflags & IPT_INV_PROTO)
++		&& !(ip->flags & IPT_INV_PROTO)
+ 		&& matchsize == IPT_ALIGN(sizeof(struct ipt_multiport))
+ 		&& (multiinfo->flags == IPT_MULTIPORT_SOURCE
+ 		    || multiinfo->flags == IPT_MULTIPORT_DESTINATION
+diff -Nurb linux/net/ipv4/netfilter/ipt_pool.c linux.stock/net/ipv4/netfilter/ipt_pool.c
+--- linux/net/ipv4/netfilter/ipt_pool.c	2003-07-04 04:12:32.000000000 -0400
++++ linux.stock/net/ipv4/netfilter/ipt_pool.c	1969-12-31 19:00:00.000000000 -0500
+@@ -1,71 +0,0 @@
+-/* Kernel module to match an IP address pool. */
+-
+-#include <linux/module.h>
+-#include <linux/ip.h>
+-#include <linux/skbuff.h>
+-
+-#include <linux/netfilter_ipv4/ip_tables.h>
+-#include <linux/netfilter_ipv4/ip_pool.h>
+-#include <linux/netfilter_ipv4/ipt_pool.h>
+-
+-static inline int match_pool(
+-	ip_pool_t index,
+-	__u32 addr,
+-	int inv
+-) {
+-	if (ip_pool_match(index, ntohl(addr)))
+-		inv = !inv;
+-	return inv;
+-}
+-
+-static int match(
+-	const struct sk_buff *skb,
+-	const struct net_device *in,
+-	const struct net_device *out,
+-	const void *matchinfo,
+-	int offset,
+-	const void *hdr,
+-	u_int16_t datalen,
+-	int *hotdrop
+-) {
+-	const struct ipt_pool_info *info = matchinfo;
+-	const struct iphdr *iph = skb->nh.iph;
+-
+-	if (info->src != IP_POOL_NONE && !match_pool(info->src, iph->saddr,
+-						info->flags&IPT_POOL_INV_SRC))
+-		return 0;
+-
+-	if (info->dst != IP_POOL_NONE && !match_pool(info->dst, iph->daddr,
+-						info->flags&IPT_POOL_INV_DST))
+-		return 0;
+-
+-	return 1;
+-}
+-
+-static int checkentry(
+-	const char *tablename,
+-	const struct ipt_ip *ip,
+-	void *matchinfo,
+-	unsigned int matchsize,
+-	unsigned int hook_mask
+-) {
+-	if (matchsize != IPT_ALIGN(sizeof(struct ipt_pool_info)))
+-		return 0;
+-	return 1;
+-}
+-
+-static struct ipt_match pool_match
+-= { { NULL, NULL }, "pool", &match, &checkentry, NULL, THIS_MODULE };
+-
+-static int __init init(void)
+-{
+-	return ipt_register_match(&pool_match);
+-}
+-
+-static void __exit fini(void)
+-{
+-	ipt_unregister_match(&pool_match);
+-}
+-
+-module_init(init);
+-module_exit(fini);
+diff -Nurb linux/net/ipv6/mcast.c linux.stock/net/ipv6/mcast.c
+--- linux/net/ipv6/mcast.c	2003-10-14 04:09:34.000000000 -0400
++++ linux.stock/net/ipv6/mcast.c	2004-05-09 04:13:22.000000000 -0400
+@@ -5,7 +5,7 @@
+  *	Authors:
+  *	Pedro Roque		<roque@di.fc.ul.pt>	
+  *
+- *	$Id: mcast.c,v 1.1.1.4 2003/10/14 08:09:34 sparq Exp $
++ *	$Id: mcast.c,v 1.38 2001/08/15 07:36:31 davem Exp $
+  *
+  *	Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c 
+  *
+--- linux/include/linux/ppp-comp.h	2004-08-16 20:58:32.089851872 -0400
++++ linux.stock/include/linux/ppp-comp.h	2004-08-16 20:59:48.217278744 -0400
+@@ -24,7 +24,7 @@
+  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
+  * OR MODIFICATIONS.
+  *
+- * $Id: ppp-comp.h,v 1.1.1.4 2003/10/14 08:09:26 sparq Exp $
++ * $Id: ppp-comp.h,v 1.6 1997/11/27 06:04:44 paulus Exp $
+  */
+ 
+ /*