Author: zbyniu Date: Thu Mar 13 19:33:34 2008 GMT Module: SOURCES Tag: HEAD ---- Log message: - raw http://mike.it-loops.com/rtsp/rtsp-2.6.24.patch
---- Files affected: SOURCES: kernel-nf_rtsp.patch (NONE -> 1.1) (NEW) ---- Diffs: ================================================================ Index: SOURCES/kernel-nf_rtsp.patch diff -u /dev/null SOURCES/kernel-nf_rtsp.patch:1.1 --- /dev/null Thu Mar 13 20:33:34 2008 +++ SOURCES/kernel-nf_rtsp.patch Thu Mar 13 20:33:29 2008 @@ -0,0 +1,1366 @@ +diff -purN linux-2.6.23-rc2.orig/include/linux/netfilter_helpers.h linux-2.6.23-rc2/include/linux/netfilter_helpers.h +--- linux-2.6.23-rc2.orig/include/linux/netfilter_helpers.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.23-rc2/include/linux/netfilter_helpers.h 2007-08-05 10:53:55.000000000 +0200 +@@ -0,0 +1,133 @@ ++/* ++ * Helpers for netfiler modules. This file provides implementations for basic ++ * functions such as strncasecmp(), etc. ++ * ++ * gcc will warn for defined but unused functions, so we only include the ++ * functions requested. The following macros are used: ++ * NF_NEED_STRNCASECMP nf_strncasecmp() ++ * NF_NEED_STRTOU16 nf_strtou16() ++ * NF_NEED_STRTOU32 nf_strtou32() ++ */ ++#ifndef _NETFILTER_HELPERS_H ++#define _NETFILTER_HELPERS_H ++ ++/* Only include these functions for kernel code. */ ++#ifdef __KERNEL__ ++ ++#include <linux/ctype.h> ++#define iseol(c) ( (c) == '\r' || (c) == '\n' ) ++ ++/* ++ * The standard strncasecmp() ++ */ ++#ifdef NF_NEED_STRNCASECMP ++static int ++nf_strncasecmp(const char* s1, const char* s2, u_int32_t len) ++{ ++ if (s1 == NULL || s2 == NULL) ++ { ++ if (s1 == NULL && s2 == NULL) ++ { ++ return 0; ++ } ++ return (s1 == NULL) ? -1 : 1; ++ } ++ while (len > 0 && tolower(*s1) == tolower(*s2)) ++ { ++ len--; ++ s1++; ++ s2++; ++ } ++ return ( (len == 0) ? 0 : (tolower(*s1) - tolower(*s2)) ); ++} ++#endif /* NF_NEED_STRNCASECMP */ ++ ++/* ++ * Parse a string containing a 16-bit unsigned integer. ++ * Returns the number of chars used, or zero if no number is found. ++ */ ++#ifdef NF_NEED_STRTOU16 ++static int ++nf_strtou16(const char* pbuf, u_int16_t* pval) ++{ ++ int n = 0; ++ ++ *pval = 0; ++ while (isdigit(pbuf[n])) ++ { ++ *pval = (*pval * 10) + (pbuf[n] - '0'); ++ n++; ++ } ++ ++ return n; ++} ++#endif /* NF_NEED_STRTOU16 */ ++ ++/* ++ * Parse a string containing a 32-bit unsigned integer. ++ * Returns the number of chars used, or zero if no number is found. ++ */ ++#ifdef NF_NEED_STRTOU32 ++static int ++nf_strtou32(const char* pbuf, u_int32_t* pval) ++{ ++ int n = 0; ++ ++ *pval = 0; ++ while (pbuf[n] >= '0' && pbuf[n] <= '9') ++ { ++ *pval = (*pval * 10) + (pbuf[n] - '0'); ++ n++; ++ } ++ ++ return n; ++} ++#endif /* NF_NEED_STRTOU32 */ ++ ++/* ++ * Given a buffer and length, advance to the next line and mark the current ++ * line. ++ */ ++#ifdef NF_NEED_NEXTLINE ++static int ++nf_nextline(char* p, uint len, uint* poff, uint* plineoff, uint* plinelen) ++{ ++ uint off = *poff; ++ uint physlen = 0; ++ ++ if (off >= len) ++ { ++ return 0; ++ } ++ ++ while (p[off] != '\n') ++ { ++ if (len-off <= 1) ++ { ++ return 0; ++ } ++ ++ physlen++; ++ off++; ++ } ++ ++ /* if we saw a crlf, physlen needs adjusted */ ++ if (physlen > 0 && p[off] == '\n' && p[off-1] == '\r') ++ { ++ physlen--; ++ } ++ ++ /* advance past the newline */ ++ off++; ++ ++ *plineoff = *poff; ++ *plinelen = physlen; ++ *poff = off; ++ ++ return 1; ++} ++#endif /* NF_NEED_NEXTLINE */ ++ ++#endif /* __KERNEL__ */ ++ ++#endif /* _NETFILTER_HELPERS_H */ +diff -purN linux-2.6.23-rc2.orig/include/linux/netfilter_mime.h linux-2.6.23-rc2/include/linux/netfilter_mime.h +--- linux-2.6.23-rc2.orig/include/linux/netfilter_mime.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.23-rc2/include/linux/netfilter_mime.h 2007-08-05 10:53:55.000000000 +0200 +@@ -0,0 +1,89 @@ ++/* ++ * MIME functions for netfilter modules. This file provides implementations ++ * for basic MIME parsing. MIME headers are used in many protocols, such as ++ * HTTP, RTSP, SIP, etc. ++ * ++ * gcc will warn for defined but unused functions, so we only include the ++ * functions requested. The following macros are used: ++ * NF_NEED_MIME_NEXTLINE nf_mime_nextline() ++ */ ++#ifndef _NETFILTER_MIME_H ++#define _NETFILTER_MIME_H ++ ++/* Only include these functions for kernel code. */ ++#ifdef __KERNEL__ ++ ++#include <linux/ctype.h> ++ ++/* ++ * Given a buffer and length, advance to the next line and mark the current ++ * line. If the current line is empty, *plinelen will be set to zero. If ++ * not, it will be set to the actual line length (including CRLF). ++ * ++ * 'line' in this context means logical line (includes LWS continuations). ++ * Returns 1 on success, 0 on failure. ++ */ ++#ifdef NF_NEED_MIME_NEXTLINE ++static int ++nf_mime_nextline(char* p, uint len, uint* poff, uint* plineoff, uint* plinelen) ++{ ++ uint off = *poff; ++ uint physlen = 0; ++ int is_first_line = 1; ++ ++ if (off >= len) ++ { ++ return 0; ++ } ++ ++ do ++ { ++ while (p[off] != '\n') ++ { ++ if (len-off <= 1) ++ { ++ return 0; ++ } ++ ++ physlen++; ++ off++; ++ } ++ ++ /* if we saw a crlf, physlen needs adjusted */ ++ if (physlen > 0 && p[off] == '\n' && p[off-1] == '\r') ++ { ++ physlen--; ++ } ++ ++ /* advance past the newline */ ++ off++; ++ ++ /* check for an empty line */ ++ if (physlen == 0) ++ { ++ break; ++ } ++ ++ /* check for colon on the first physical line */ ++ if (is_first_line) ++ { ++ is_first_line = 0; ++ if (memchr(p+(*poff), ':', physlen) == NULL) ++ { ++ return 0; ++ } ++ } ++ } ++ while (p[off] == ' ' || p[off] == '\t'); ++ ++ *plineoff = *poff; ++ *plinelen = (physlen == 0) ? 0 : (off - *poff); ++ *poff = off; ++ ++ return 1; ++} ++#endif /* NF_NEED_MIME_NEXTLINE */ ++ ++#endif /* __KERNEL__ */ ++ ++#endif /* _NETFILTER_MIME_H */ +diff -purN linux-2.6.23-rc2.orig/net/ipv4/netfilter/Kconfig linux-2.6.23-rc2/net/ipv4/netfilter/Kconfig +--- linux-2.6.23-rc2.orig/net/ipv4/netfilter/Kconfig 2007-08-05 21:17:01.000000000 +0200 ++++ linux-2.6.23-rc2/net/ipv4/netfilter/Kconfig 2007-08-05 11:04:59.000000000 +0200 +@@ -274,6 +274,11 @@ config NF_NAT_IRC + depends on IP_NF_IPTABLES && NF_CONNTRACK && NF_NAT + default NF_NAT && NF_CONNTRACK_IRC + ++config NF_NAT_RTSP ++ tristate ++ depends on IP_NF_IPTABLES && NF_CONNTRACK && NF_NAT ++ default NF_NAT && NF_CONNTRACK_RTSP ++ + config NF_NAT_TFTP + tristate + depends on IP_NF_IPTABLES && NF_CONNTRACK && NF_NAT +diff -purN linux-2.6.23-rc2.orig/net/ipv4/netfilter/Makefile linux-2.6.23-rc2/net/ipv4/netfilter/Makefile +--- linux-2.6.23-rc2.orig/net/ipv4/netfilter/Makefile 2007-08-05 21:14:19.000000000 +0200 ++++ linux-2.6.23-rc2/net/ipv4/netfilter/Makefile 2007-08-05 10:53:55.000000000 +0200 +@@ -23,6 +23,7 @@ obj-$(CONFIG_NF_NAT_AMANDA) += nf_nat_am + obj-$(CONFIG_NF_NAT_FTP) += nf_nat_ftp.o + obj-$(CONFIG_NF_NAT_H323) += nf_nat_h323.o + obj-$(CONFIG_NF_NAT_IRC) += nf_nat_irc.o ++obj-$(CONFIG_NF_NAT_RTSP) += nf_nat_rtsp.o + obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o + obj-$(CONFIG_NF_NAT_SIP) += nf_nat_sip.o + obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o +diff -purN linux-2.6.23-rc2.orig/net/netfilter/Kconfig linux-2.6.23-rc2/net/netfilter/Kconfig +--- linux-2.6.23-rc2.orig/net/netfilter/Kconfig 2007-08-05 21:17:02.000000000 +0200 ++++ linux-2.6.23-rc2/net/netfilter/Kconfig 2007-08-05 11:04:59.000000000 +0200 +@@ -249,6 +249,16 @@ config NF_CONNTRACK_TFTP + + To compile it as a module, choose M here. If unsure, say N. + ++config NF_CONNTRACK_RTSP ++ tristate "RTSP protocol support" ++ depends on NF_CONNTRACK ++ help ++ Support the RTSP protocol. This allows UDP transports to be setup ++ properly, including RTP and RDT. ++ ++ If you want to compile it as a module, say 'M' here and read ++ Documentation/modules.txt. If unsure, say 'Y'. ++ + config NF_CT_NETLINK + tristate 'Connection tracking netlink interface (EXPERIMENTAL)' + depends on EXPERIMENTAL && NF_CONNTRACK && NETFILTER_NETLINK +diff -purN linux-2.6.23-rc2.orig/net/netfilter/Makefile linux-2.6.23-rc2/net/netfilter/Makefile +--- linux-2.6.23-rc2.orig/net/netfilter/Makefile 2007-08-05 21:17:02.000000000 +0200 ++++ linux-2.6.23-rc2/net/netfilter/Makefile 2007-08-05 11:04:59.000000000 +0200 +@@ -33,6 +33,7 @@ obj-$(CONFIG_NF_CONNTRACK_PPTP) += nf_co + obj-$(CONFIG_NF_CONNTRACK_SANE) += nf_conntrack_sane.o + obj-$(CONFIG_NF_CONNTRACK_SIP) += nf_conntrack_sip.o + obj-$(CONFIG_NF_CONNTRACK_TFTP) += nf_conntrack_tftp.o ++obj-$(CONFIG_NF_CONNTRACK_RTSP) += nf_conntrack_rtsp.o + + # generic X tables + obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o +diff -purN linux-2.6.24-rc1.orig/include/linux/netfilter/nf_conntrack_rtsp.h linux-2.6.24-rc1/include/linux/netfilter/nf_conntrack_rtsp.h +--- linux-2.6.24-rc1.orig/include/linux/netfilter/nf_conntrack_rtsp.h 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.24-rc1/include/linux/netfilter/nf_conntrack_rtsp.h 2007-11-10 17:16:36.000000000 +0100 +@@ -0,0 +1,63 @@ ++/* ++ * RTSP extension for IP connection tracking. ++ * (C) 2003 by Tom Marshall <tmarshall at real.com> ++ * based on ip_conntrack_irc.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. ++ */ ++#ifndef _IP_CONNTRACK_RTSP_H ++#define _IP_CONNTRACK_RTSP_H ++ ++//#define IP_NF_RTSP_DEBUG 1 ++#define IP_NF_RTSP_VERSION "0.6.21" ++ ++#ifdef __KERNEL__ ++/* port block types */ ++typedef enum { ++ pb_single, /* client_port=x */ ++ pb_range, /* client_port=x-y */ ++ pb_discon /* client_port=x/y (rtspbis) */ ++} portblock_t; ++ ++/* We record seq number and length of rtsp headers here, all in host order. */ ++ ++/* ++ * This structure is per expected connection. It is a member of struct ++ * ip_conntrack_expect. The TCP SEQ for the conntrack expect is stored ++ * there and we are expected to only store the length of the data which ++ * needs replaced. If a packet contains multiple RTSP messages, we create ++ * one expected connection per message. ++ * ++ * We use these variables to mark the entire header block. This may seem ++ * like overkill, but the nature of RTSP requires it. A header may appear ++ * multiple times in a message. We must treat two Transport headers the ++ * same as one Transport header with two entries. ++ */ ++struct ip_ct_rtsp_expect ++{ ++ u_int32_t len; /* length of header block */ ++ portblock_t pbtype; /* Type of port block that was requested */ ++ u_int16_t loport; /* Port that was requested, low or first */ ++ u_int16_t hiport; /* Port that was requested, high or second */ ++#if 0 ++ uint method; /* RTSP method */ ++ uint cseq; /* CSeq from request */ ++#endif ++}; ++ ++extern unsigned int (*nf_nat_rtsp_hook)(struct sk_buff *skb, ++ enum ip_conntrack_info ctinfo, ++ unsigned int matchoff, unsigned int matchlen, ++ struct ip_ct_rtsp_expect *prtspexp, ++ struct nf_conntrack_expect *exp); ++ ++extern void (*nf_nat_rtsp_hook_expectfn)(struct nf_conn *ct, struct nf_conntrack_expect *exp); ++ ++#define RTSP_PORT 554 ++ ++#endif /* __KERNEL__ */ ++ ++#endif /* _IP_CONNTRACK_RTSP_H */ +diff -purN linux-2.6.24-rc1.orig/net/ipv4/netfilter/nf_nat_rtsp.c linux-2.6.24-rc1/net/ipv4/netfilter/nf_nat_rtsp.c +--- linux-2.6.24-rc1.orig/net/ipv4/netfilter/nf_nat_rtsp.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.24-rc1/net/ipv4/netfilter/nf_nat_rtsp.c 2007-11-10 17:17:21.000000000 +0100 +@@ -0,0 +1,489 @@ ++/* ++ * RTSP extension for TCP NAT alteration ++ * (C) 2003 by Tom Marshall <tmarshall at real.com> ++ * based on ip_nat_irc.c ++ * ++ * 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 nf_nat_rtsp.o ports=port1,port2,...port<MAX_PORTS> ++ * stunaddr=<address> ++ * destaction=[auto|strip|none] ++ * ++ * If no ports are specified, the default will be port 554 only. ++ * ++ * stunaddr specifies the address used to detect that a client is using STUN. ++ * If this address is seen in the destination parameter, it is assumed that ++ * the client has already punched a UDP hole in the firewall, so we don't ++ * mangle the client_port. If none is specified, it is autodetected. It ++ * only needs to be set if you have multiple levels of NAT. It should be ++ * set to the external address that the STUN clients detect. Note that in ++ * this case, it will not be possible for clients to use UDP with servers ++ * between the NATs. ++ * ++ * If no destaction is specified, auto is used. ++ * destaction=auto: strip destination parameter if it is not stunaddr. ++ * destaction=strip: always strip destination parameter (not recommended). ++ * destaction=none: do not touch destination parameter (not recommended). ++ */ ++ ++#include <linux/module.h> ++#include <net/tcp.h> ++#include <net/netfilter/nf_nat_helper.h> ++#include <net/netfilter/nf_nat_rule.h> ++#include <linux/netfilter/nf_conntrack_rtsp.h> ++#include <net/netfilter/nf_conntrack_expect.h> ++ ++#include <linux/inet.h> ++#include <linux/ctype.h> ++#define NF_NEED_STRNCASECMP ++#define NF_NEED_STRTOU16 ++#include <linux/netfilter_helpers.h> ++#define NF_NEED_MIME_NEXTLINE ++#include <linux/netfilter_mime.h> ++ ++#define MAX_PORTS 8 ++#define DSTACT_AUTO 0 ++#define DSTACT_STRIP 1 ++#define DSTACT_NONE 2 ++ ++static char* stunaddr = NULL; ++static char* destaction = NULL; ++ ++static u_int32_t extip = 0; ++static int dstact = 0; ++ ++MODULE_AUTHOR("Tom Marshall <tmarshall at real.com>"); ++MODULE_DESCRIPTION("RTSP network address translation module"); ++MODULE_LICENSE("GPL"); ++module_param(stunaddr, charp, 0644); ++MODULE_PARM_DESC(stunaddr, "Address for detecting STUN"); ++module_param(destaction, charp, 0644); ++MODULE_PARM_DESC(destaction, "Action for destination parameter (auto/strip/none)"); ++ ++#define SKIP_WSPACE(ptr,len,off) while(off < len && isspace(*(ptr+off))) { off++; } ++ ++/*** helper functions ***/ ++ ++static void ++get_skb_tcpdata(struct sk_buff* skb, char** pptcpdata, uint* ptcpdatalen) ++{ ++ struct iphdr* iph = ip_hdr(skb); ++ struct tcphdr* tcph = (void *)iph + ip_hdrlen(skb); ++ ++ *pptcpdata = (char*)tcph + tcph->doff*4; ++ *ptcpdatalen = ((char*)skb_transport_header(skb) + skb->len) - *pptcpdata; ++} ++ ++/*** nat functions ***/ ++ ++/* ++ * Mangle the "Transport:" header: ++ * - Replace all occurences of "client_port=<spec>" ++ * - Handle destination parameter ++ * ++ * In: ++ * ct, ctinfo = conntrack context ++ * skb = packet ++ * tranoff = Transport header offset from TCP data ++ * tranlen = Transport header length (incl. CRLF) ++ * rport_lo = replacement low port (host endian) ++ * rport_hi = replacement high port (host endian) ++ * ++ * Returns packet size difference. ++ * ++ * Assumes that a complete transport header is present, ending with CR or LF ++ */ ++static int ++rtsp_mangle_tran(enum ip_conntrack_info ctinfo, ++ struct nf_conntrack_expect* exp, ++ struct ip_ct_rtsp_expect* prtspexp, ++ struct sk_buff* skb, uint tranoff, uint tranlen) ++{ ++ char* ptcp; ++ uint tcplen; ++ char* ptran; ++ char rbuf1[16]; /* Replacement buffer (one port) */ ++ uint rbuf1len; /* Replacement len (one port) */ ++ char rbufa[16]; /* Replacement buffer (all ports) */ ++ uint rbufalen; /* Replacement len (all ports) */ ++ u_int32_t newip; ++ u_int16_t loport, hiport; ++ uint off = 0; ++ uint diff; /* Number of bytes we removed */ ++ ++ struct nf_conn *ct = exp->master; ++ struct nf_conntrack_tuple *t; ++ ++ char szextaddr[15+1]; ++ uint extaddrlen; ++ int is_stun; ++ ++ get_skb_tcpdata(skb, &ptcp, &tcplen); ++ ptran = ptcp+tranoff; ++ ++ if (tranoff+tranlen > tcplen || tcplen-tranoff < tranlen || ++ tranlen < 10 || !iseol(ptran[tranlen-1]) || ++ nf_strncasecmp(ptran, "Transport:", 10) != 0) ++ { ++ pr_info("sanity check failed\n"); ++ return 0; ++ } ++ off += 10; ++ SKIP_WSPACE(ptcp+tranoff, tranlen, off); ++ ++ newip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip; ++ t = &exp->tuple; ++ t->dst.u3.ip = newip; ++ ++ extaddrlen = extip ? sprintf(szextaddr, "%u.%u.%u.%u", NIPQUAD(extip)) ++ : sprintf(szextaddr, "%u.%u.%u.%u", NIPQUAD(newip)); ++ pr_debug("stunaddr=%s (%s)\n", szextaddr, (extip?"forced":"auto")); ++ ++ rbuf1len = rbufalen = 0; ++ switch (prtspexp->pbtype) ++ { ++ case pb_single: ++ for (loport = prtspexp->loport; loport != 0; loport++) /* XXX: improper wrap? */ ++ { ++ t->dst.u.udp.port = htons(loport); ++ if (nf_ct_expect_related(exp) == 0) ++ { ++ pr_debug("using port %hu\n", loport); ++ break; ++ } ++ } ++ if (loport != 0) ++ { ++ rbuf1len = sprintf(rbuf1, "%hu", loport); ++ rbufalen = sprintf(rbufa, "%hu", loport); ++ } ++ break; ++ case pb_range: ++ for (loport = prtspexp->loport; loport != 0; loport += 2) /* XXX: improper wrap? */ ++ { ++ t->dst.u.udp.port = htons(loport); ++ if (nf_ct_expect_related(exp) == 0) ++ { ++ hiport = loport + 1; //~exp->mask.dst.u.udp.port; ++ pr_debug("using ports %hu-%hu\n", loport, hiport); ++ break; ++ } ++ } ++ if (loport != 0) ++ { ++ rbuf1len = sprintf(rbuf1, "%hu", loport); ++ rbufalen = sprintf(rbufa, "%hu-%hu", loport, loport+1); ++ } ++ break; ++ case pb_discon: ++ for (loport = prtspexp->loport; loport != 0; loport++) /* XXX: improper wrap? */ ++ { ++ t->dst.u.udp.port = htons(loport); ++ if (nf_ct_expect_related(exp) == 0) ++ { ++ pr_debug("using port %hu (1 of 2)\n", loport); ++ break; ++ } ++ } ++ for (hiport = prtspexp->hiport; hiport != 0; hiport++) /* XXX: improper wrap? */ ++ { ++ t->dst.u.udp.port = htons(hiport); ++ if (nf_ct_expect_related(exp) == 0) ++ { ++ pr_debug("using port %hu (2 of 2)\n", hiport); ++ break; ++ } ++ } ++ if (loport != 0 && hiport != 0) ++ { ++ rbuf1len = sprintf(rbuf1, "%hu", loport); ++ if (hiport == loport+1) ++ { ++ rbufalen = sprintf(rbufa, "%hu-%hu", loport, hiport); ++ } ++ else ++ { ++ rbufalen = sprintf(rbufa, "%hu/%hu", loport, hiport); ++ } ++ } ++ break; ++ } ++ ++ if (rbuf1len == 0) ++ { ++ return 0; /* cannot get replacement port(s) */ ++ } ++ ++ /* Transport: tran;field;field=val,tran;field;field=val,... */ ++ while (off < tranlen) ++ { ++ uint saveoff; ++ const char* pparamend; ++ uint nextparamoff; ++ ++ pparamend = memchr(ptran+off, ',', tranlen-off); ++ pparamend = (pparamend == NULL) ? ptran+tranlen : pparamend+1; ++ nextparamoff = pparamend-ptcp; ++ ++ /* ++ * We pass over each param twice. On the first pass, we look for a <<Diff was trimmed, longer than 597 lines>> _______________________________________________ pld-cvs-commit mailing list pld-cvs-commit@lists.pld-linux.org http://lists.pld-linux.org/mailman/listinfo/pld-cvs-commit