SOURCES (LINUX_2_6): kernel-2.6.18-layer7-2.7.patch (NEW) - 2.6.19...

mguevara mguevara at pld-linux.org
Thu Dec 14 14:19:10 CET 2006


Author: mguevara                     Date: Thu Dec 14 13:19:10 2006 GMT
Module: SOURCES                       Tag: LINUX_2_6
---- Log message:
- 2.6.19 work in progress
- http://downloads.sourceforge.net/l7-filter/netfilter-layer7-v2.7.tar.gz

---- Files affected:
SOURCES:
   kernel-2.6.18-layer7-2.7.patch (NONE -> 1.1.2.1)  (NEW)

---- Diffs:

================================================================
Index: SOURCES/kernel-2.6.18-layer7-2.7.patch
diff -u /dev/null SOURCES/kernel-2.6.18-layer7-2.7.patch:1.1.2.1
--- /dev/null	Thu Dec 14 14:19:10 2006
+++ SOURCES/kernel-2.6.18-layer7-2.7.patch	Thu Dec 14 14:19:05 2006
@@ -0,0 +1,2053 @@
+--- linux-2.6.18/include/linux/netfilter_ipv4/ip_conntrack.h	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/include/linux/netfilter_ipv4/ip_conntrack.h	2006-09-24 10:17:45.000000000 -0500
+@@ -127,6 +127,15 @@ struct ip_conntrack
+ 	/* Traversed often, so hopefully in different cacheline to top */
+ 	/* These are my tuples; original and reply */
+ 	struct ip_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
++
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++        struct {
++                char * app_proto; /* e.g. "http". NULL before decision. "unknown" after decision if no match */
++                char * app_data;  /* application layer data so far.  NULL after match decision */
++                unsigned int app_data_len;
++        } layer7;
++#endif
++
+ };
+ 
+ struct ip_conntrack_expect
+--- linux-2.6.18/include/linux/netfilter_ipv4/ipt_layer7.h	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.6.18-layer7/include/linux/netfilter_ipv4/ipt_layer7.h	2006-09-24 10:17:45.000000000 -0500
+@@ -0,0 +1,26 @@
++/*
++  By Matthew Strait <quadong at users.sf.net>, Dec 2003.
++  http://l7-filter.sf.net
++
++  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.
++  http://www.gnu.org/licenses/gpl.txt
++*/
++
++#ifndef _IPT_LAYER7_H
++#define _IPT_LAYER7_H
++
++#define MAX_PATTERN_LEN 8192
++#define MAX_PROTOCOL_LEN 256
++
++typedef char *(*proc_ipt_search) (char *, char, char *);
++
++struct ipt_layer7_info {
++    char protocol[MAX_PROTOCOL_LEN];
++    char invert:1;
++    char pattern[MAX_PATTERN_LEN];
++};
++
++#endif /* _IPT_LAYER7_H */
+--- linux-2.6.18/net/ipv4/netfilter/Kconfig	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/Kconfig	2006-09-24 10:17:45.000000000 -0500
+@@ -248,6 +248,24 @@ config IP_NF_MATCH_IPRANGE
+ 
+ 	  To compile it as a module, choose M here.  If unsure, say N.
+ 
++config IP_NF_MATCH_LAYER7
++	tristate "Layer 7 match support (EXPERIMENTAL)"
++	depends on IP_NF_IPTABLES && IP_NF_CT_ACCT && IP_NF_CONNTRACK && EXPERIMENTAL
++	help
++	  Say Y if you want to be able to classify connections (and their
++	  packets) based on regular expression matching of their application
++	  layer data.   This is one way to classify applications such as
++	  peer-to-peer filesharing systems that do not always use the same
++	  port.
++
++	  To compile it as a module, choose M here.  If unsure, say N.
++
++config IP_NF_MATCH_LAYER7_DEBUG
++	bool "Layer 7 debugging output"
++	depends on IP_NF_MATCH_LAYER7
++	help
++	  Say Y to get lots of debugging output.
++
+ config IP_NF_MATCH_TOS
+ 	tristate "TOS match support"
+ 	depends on IP_NF_IPTABLES
+--- linux-2.6.18/net/ipv4/netfilter/Makefile	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/Makefile	2006-09-24 10:17:45.000000000 -0500
+@@ -64,6 +64,8 @@ obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
+ obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
+ obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
+ 
++obj-$(CONFIG_IP_NF_MATCH_LAYER7) += ipt_layer7.o
++
+ # targets
+ obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
+ obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o
+--- linux-2.6.18/net/ipv4/netfilter/ip_conntrack_core.c	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/ip_conntrack_core.c	2006-09-24 10:17:45.000000000 -0500
+@@ -338,6 +338,13 @@ destroy_conntrack(struct nf_conntrack *n
+ 	 * too. */
+ 	ip_ct_remove_expectations(ct);
+ 
++	#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	if(ct->layer7.app_proto)
++		kfree(ct->layer7.app_proto);
++	if(ct->layer7.app_data)
++		kfree(ct->layer7.app_data);
++	#endif
++
+ 	/* We overload first tuple to link into unconfirmed list. */
+ 	if (!is_confirmed(ct)) {
+ 		BUG_ON(list_empty(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list));
+--- linux-2.6.18/net/ipv4/netfilter/ip_conntrack_standalone.c	2006-09-19 22:42:06.000000000 -0500
++++ linux-2.6.18-layer7/net/ipv4/netfilter/ip_conntrack_standalone.c	2006-09-24 10:17:45.000000000 -0500
+@@ -193,6 +193,12 @@ static int ct_seq_show(struct seq_file *
+ 		return -ENOSPC;
+ #endif
+ 
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	if(conntrack->layer7.app_proto)
++		if (seq_printf(s, "l7proto=%s ",conntrack->layer7.app_proto))
++			return 1;
++#endif
++
+ 	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
+ 		return -ENOSPC;
+ 
+--- linux-2.6.18/net/ipv4/netfilter/ipt_layer7.c	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.6.18-layer7/net/ipv4/netfilter/ipt_layer7.c	2006-12-12 22:45:48.000000000 -0600
+@@ -0,0 +1,584 @@
++/*
++  Kernel module to match application layer (OSI layer 7)
++  data in connections.
++
++  http://l7-filter.sf.net
++
++  By Matthew Strait and Ethan Sommer, 2003-2005.
++
++  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.
++  http://www.gnu.org/licenses/gpl.txt
++
++  Based on ipt_string.c (C) 2000 Emmanuel Roger <winfield at freegates.be>
++  and cls_layer7.c (C) 2003 Matthew Strait, Ethan Sommer, Justin Levandoski
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_conntrack.h>
++#include <linux/proc_fs.h>
++#include <linux/ctype.h>
++#include <net/ip.h>
++#include <net/tcp.h>
++#include <linux/spinlock.h>
++
++#include "regexp/regexp.c"
++
++#include <linux/netfilter_ipv4/ipt_layer7.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++
++MODULE_AUTHOR("Matthew Strait <quadong at users.sf.net>, Ethan Sommer <sommere at users.sf.net>");
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("iptables application layer match module");
++MODULE_VERSION("2.0");
++
++static int maxdatalen = 2048; // this is the default
++module_param(maxdatalen, int, 0444);
++MODULE_PARM_DESC(maxdatalen, "maximum bytes of data looked at by l7-filter");
++
++#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++	#define DPRINTK(format,args...) printk(format,##args)
++#else
++	#define DPRINTK(format,args...)
++#endif
++
++#define TOTAL_PACKETS master_conntrack->counters[IP_CT_DIR_ORIGINAL].packets + \
++		      master_conntrack->counters[IP_CT_DIR_REPLY].packets
++
++/* Number of packets whose data we look at.
++This can be modified through /proc/net/layer7_numpackets */
++static int num_packets = 10;
++
++static struct pattern_cache {
++	char * regex_string;
++	regexp * pattern;
++	struct pattern_cache * next;
++} * first_pattern_cache = NULL;
++
++/* I'm new to locking.  Here are my assumptions:
++
++- No one will write to /proc/net/layer7_numpackets over and over very fast;
++  if they did, nothing awful would happen.
++
++- This code will never be processing the same packet twice at the same time,
++  because iptables rules are traversed in order.
++
++- It doesn't matter if two packets from different connections are in here at
++  the same time, because they don't share any data.
++
++- It _does_ matter if two packets from the same connection (or one from a
++  master and one from its child) are here at the same time.  In this case,
++  we have to protect the conntracks and the list of compiled patterns.
++*/
++DEFINE_RWLOCK(ct_lock);
++DEFINE_SPINLOCK(list_lock);
++
++#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++/* Converts an unfriendly string into a friendly one by
++replacing unprintables with periods and all whitespace with " ". */
++static char * friendly_print(unsigned char * s)
++{
++	char * f = kmalloc(strlen(s) + 1, GFP_ATOMIC);
++	int i;
++
++	if(!f) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in friendly_print, bailing.\n");
++		return NULL;
++	}
++
++	for(i = 0; i < strlen(s); i++){
++		if(isprint(s[i]) && s[i] < 128)	f[i] = s[i];
++		else if(isspace(s[i]))		f[i] = ' ';
++		else 				f[i] = '.';
++	}
++	f[i] = '\0';
++	return f;
++}
++
++static char dec2hex(int i)
++{
++	switch (i) {
++		case 0 ... 9:
++			return (char)(i + '0');
++			break;
++		case 10 ... 15:
++			return (char)(i - 10 + 'a');
++			break;
++		default:
++			if (net_ratelimit())
++				printk("Problem in dec2hex\n");
++			return '\0';
++	}
++}
++
++static char * hex_print(unsigned char * s)
++{
++	char * g = kmalloc(strlen(s)*3 + 1, GFP_ATOMIC);
++	int i;
++
++	if(!g) {
++	       if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in hex_print, bailing.\n");
++	       return NULL;
++	}
++
++	for(i = 0; i < strlen(s); i++) {
++		g[i*3    ] = dec2hex(s[i]/16);
++		g[i*3 + 1] = dec2hex(s[i]%16);
++		g[i*3 + 2] = ' ';
++	}
++	g[i*3] = '\0';
++
++	return g;
++}
++#endif // DEBUG
++
++/* Use instead of regcomp.  As we expect to be seeing the same regexps over and
++over again, it make sense to cache the results. */
++static regexp * compile_and_cache(char * regex_string, char * protocol)
++{
++	struct pattern_cache * node               = first_pattern_cache;
++	struct pattern_cache * last_pattern_cache = first_pattern_cache;
++	struct pattern_cache * tmp;
++	unsigned int len;
++
++	while (node != NULL) {
++		if (!strcmp(node->regex_string, regex_string))
++		return node->pattern;
++
++		last_pattern_cache = node;/* points at the last non-NULL node */
++		node = node->next;
++	}
++
++	/* If we reach the end of the list, then we have not yet cached
++	   the pattern for this regex. Let's do that now.
++	   Be paranoid about running out of memory to avoid list corruption. */
++	tmp = kmalloc(sizeof(struct pattern_cache), GFP_ATOMIC);
++
++	if(!tmp) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in compile_and_cache, bailing.\n");
++		return NULL;
++	}
++
++	tmp->regex_string  = kmalloc(strlen(regex_string) + 1, GFP_ATOMIC);
++	tmp->pattern       = kmalloc(sizeof(struct regexp),    GFP_ATOMIC);
++	tmp->next = NULL;
++
++	if(!tmp->regex_string || !tmp->pattern) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: out of memory in compile_and_cache, bailing.\n");
++		kfree(tmp->regex_string);
++		kfree(tmp->pattern);
++		kfree(tmp);
++		return NULL;
++	}
++
++	/* Ok.  The new node is all ready now. */
++	node = tmp;
++
++	if(first_pattern_cache == NULL) /* list is empty */
++		first_pattern_cache = node; /* make node the beginning */
++	else
++		last_pattern_cache->next = node; /* attach node to the end */
++
++	/* copy the string and compile the regex */
++	len = strlen(regex_string);
++	DPRINTK("About to compile this: \"%s\"\n", regex_string);
++	node->pattern = regcomp(regex_string, &len);
++	if ( !node->pattern ) {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: Error compiling regexp \"%s\" (%s)\n", regex_string, protocol);
++		/* pattern is now cached as NULL, so we won't try again. */
++	}
++
++	strcpy(node->regex_string, regex_string);
++	return node->pattern;
++}
++
++static int can_handle(const struct sk_buff *skb)
++{
++	if(!skb->nh.iph) /* not IP */
++		return 0;
++	if(skb->nh.iph->protocol != IPPROTO_TCP &&
++	   skb->nh.iph->protocol != IPPROTO_UDP &&
++	   skb->nh.iph->protocol != IPPROTO_ICMP)
++		return 0;
++	return 1;
++}
++
++/* Returns offset the into the skb->data that the application data starts */
++static int app_data_offset(const struct sk_buff *skb)
++{
++	/* In case we are ported somewhere (ebtables?) where skb->nh.iph
++	isn't set, this can be gotten from 4*(skb->data[0] & 0x0f) as well. */
++	int ip_hl = 4*skb->nh.iph->ihl;
++
++	if( skb->nh.iph->protocol == IPPROTO_TCP ) {
++		/* 12 == offset into TCP header for the header length field.
++		Can't get this with skb->h.th->doff because the tcphdr
++		struct doesn't get set when routing (this is confirmed to be
++		true in Netfilter as well as QoS.) */
++		int tcp_hl = 4*(skb->data[ip_hl + 12] >> 4);
++
++		return ip_hl + tcp_hl;
++	} else if( skb->nh.iph->protocol == IPPROTO_UDP  ) {
++		return ip_hl + 8; /* UDP header is always 8 bytes */
++	} else if( skb->nh.iph->protocol == IPPROTO_ICMP ) {
++		return ip_hl + 8; /* ICMP header is 8 bytes */
++	} else {
++		if (net_ratelimit())
++			printk(KERN_ERR "layer7: tried to handle unknown protocol!\n");
++		return ip_hl + 8; /* something reasonable */
++	}
++}
++
++/* handles whether there's a match when we aren't appending data anymore */
++static int match_no_append(struct ip_conntrack * conntrack, struct ip_conntrack * master_conntrack,
++			enum ip_conntrack_info ctinfo, enum ip_conntrack_info master_ctinfo,
++			struct ipt_layer7_info * info)
++{
++	/* If we're in here, throw the app data away */
++	write_lock(&ct_lock);
++	if(master_conntrack->layer7.app_data != NULL) {
++
++	#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++		if(!master_conntrack->layer7.app_proto) {
++			char * f = friendly_print(master_conntrack->layer7.app_data);
++			char * g = hex_print(master_conntrack->layer7.app_data);
++			DPRINTK("\nl7-filter gave up after %d bytes (%d packets):\n%s\n",
++				strlen(f), TOTAL_PACKETS, f);
++			kfree(f);
++			DPRINTK("In hex: %s\n", g);
++			kfree(g);
++		}
++	#endif
++
++		kfree(master_conntrack->layer7.app_data);
++		master_conntrack->layer7.app_data = NULL; /* don't free again */
++	}
++	write_unlock(&ct_lock);
++
++	if(master_conntrack->layer7.app_proto){
++		/* Here child connections set their .app_proto (for /proc/net/ip_conntrack) */
++		write_lock(&ct_lock);
++		if(!conntrack->layer7.app_proto) {
++			conntrack->layer7.app_proto = kmalloc(strlen(master_conntrack->layer7.app_proto)+1, GFP_ATOMIC);
++			if(!conntrack->layer7.app_proto){
++				if (net_ratelimit())
++					printk(KERN_ERR "layer7: out of memory in match_no_append, bailing.\n");
++				write_unlock(&ct_lock);
++				return 1;
++			}
++			strcpy(conntrack->layer7.app_proto, master_conntrack->layer7.app_proto);
++		}
++		write_unlock(&ct_lock);
++
++		return (!strcmp(master_conntrack->layer7.app_proto, info->protocol));
++	}
++	else {
++		/* If not classified, set to "unknown" to distinguish from
++		connections that are still being tested. */
++		write_lock(&ct_lock);
++		master_conntrack->layer7.app_proto = kmalloc(strlen("unknown")+1, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_proto){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match_no_append, bailing.\n");
++			write_unlock(&ct_lock);
++			return 1;
++		}
++		strcpy(master_conntrack->layer7.app_proto, "unknown");
++		write_unlock(&ct_lock);
++		return 0;
++	}
++}
++
++/* add the new app data to the conntrack.  Return number of bytes added. */
++static int add_data(struct ip_conntrack * master_conntrack,
++			char * app_data, int appdatalen)
++{
++	int length = 0, i;
++	int oldlength = master_conntrack->layer7.app_data_len;
++
++	// This is a fix for a race condition by Deti Fliegl. However, I'm not 
++	// clear on whether the race condition exists or whether this really 
++	// fixes it.  I might just be being dense... Anyway, if it's not really 
++	// a fix, all it does is waste a very small amount of time.
++	if(!master_conntrack->layer7.app_data) return 0;
++
++	/* Strip nulls. Make everything lower case (our regex lib doesn't
++	do case insensitivity).  Add it to the end of the current data. */
++	for(i = 0; i < maxdatalen-oldlength-1 &&
++		   i < appdatalen; i++) {
++		if(app_data[i] != '\0') {
++			master_conntrack->layer7.app_data[length+oldlength] =
++				/* the kernel version of tolower mungs 'upper ascii' */
++				isascii(app_data[i])? tolower(app_data[i]) : app_data[i];
++			length++;
++		}
++	}
++
++	master_conntrack->layer7.app_data[length+oldlength] = '\0';
++	master_conntrack->layer7.app_data_len = length + oldlength;
++
++	return length;
++}
++
++/* Returns true on match and false otherwise.  */
++static int match(/* const */ struct sk_buff *skb,
++	const struct net_device *in, const struct net_device *out,
++	const struct xt_match *match, const void *matchinfo,
++	int offset, unsigned int protoff, int *hotdrop)
++{
++	struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
++	enum ip_conntrack_info master_ctinfo, ctinfo;
++	struct ip_conntrack *master_conntrack, *conntrack;
++	unsigned char * app_data;
++	unsigned int pattern_result, appdatalen;
++	regexp * comppattern;
++
++	if(!can_handle(skb)){
++		DPRINTK("layer7: This is some protocol I can't handle.\n");
++		return info->invert;
++	}
++
++	/* Treat parent & all its children together as one connection, except
++	for the purpose of setting conntrack->layer7.app_proto in the actual
++	connection. This makes /proc/net/ip_conntrack more satisfying. */
++	if(!(conntrack = ip_conntrack_get((struct sk_buff *)skb, &ctinfo)) ||
++	   !(master_conntrack = ip_conntrack_get((struct sk_buff *)skb, &master_ctinfo))) {
++		//DPRINTK("layer7: packet is not from a known connection, giving up.\n");
++		return info->invert;
++	}
++
++	/* Try to get a master conntrack (and its master etc) for FTP, etc. */
++	while (master_ct(master_conntrack) != NULL)
++		master_conntrack = master_ct(master_conntrack);
++
++	/* if we've classified it or seen too many packets */
++	if(TOTAL_PACKETS > num_packets ||
++	   master_conntrack->layer7.app_proto) {
++
++		pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
++
++		/* skb->cb[0] == seen. Avoid doing things twice if there are two l7
++		rules. I'm not sure that using cb for this purpose is correct, although
++		it says "put your private variables there". But it doesn't look like it
++		is being used for anything else in the skbs that make it here. How can
++		I write to cb without making the compiler angry? */
++		skb->cb[0] = 1; /* marking it seen here is probably irrelevant, but consistant */
++
++		return (pattern_result ^ info->invert);
++	}
++
++	if(skb_is_nonlinear(skb)){
++		if(skb_linearize(skb) != 0){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: failed to linearize packet, bailing.\n");
++			return info->invert;
++		}
++	}
++
++	/* now that the skb is linearized, it's safe to set these. */
++	app_data = skb->data + app_data_offset(skb);
++	appdatalen = skb->tail - app_data;
++
++	spin_lock_bh(&list_lock);
++	/* the return value gets checked later, when we're ready to use it */
++	comppattern = compile_and_cache(info->pattern, info->protocol);
++	spin_unlock_bh(&list_lock);
++
++	/* On the first packet of a connection, allocate space for app data */
++	write_lock(&ct_lock);
++	if(TOTAL_PACKETS == 1 && !skb->cb[0] && !master_conntrack->layer7.app_data) {
++		master_conntrack->layer7.app_data = kmalloc(maxdatalen, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_data){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
++			write_unlock(&ct_lock);
++			return info->invert;
++		}
++
++		master_conntrack->layer7.app_data[0] = '\0';
++	}
++	write_unlock(&ct_lock);
++
++	/* Can be here, but unallocated, if numpackets is increased near
++	the beginning of a connection */
++	if(master_conntrack->layer7.app_data == NULL)
++		return (info->invert); /* unmatched */
++
++	if(!skb->cb[0]){
++		int newbytes;
++		write_lock(&ct_lock);
++		newbytes = add_data(master_conntrack, app_data, appdatalen);
++		write_unlock(&ct_lock);
++
++		if(newbytes == 0) { /* didn't add any data */
++			skb->cb[0] = 1;
++			/* Didn't match before, not going to match now */
++			return info->invert;
++		}
++	}
++
++	/* If looking for "unknown", then never match.  "Unknown" means that
++	we've given up; we're still trying with these packets. */
++	read_lock(&ct_lock);
++	if(!strcmp(info->protocol, "unknown")) {
++		pattern_result = 0;
++	/* If the regexp failed to compile, don't bother running it */
++	} else if(comppattern && regexec(comppattern, master_conntrack->layer7.app_data)) {
++		DPRINTK("layer7: matched %s\n", info->protocol);
++		pattern_result = 1;
++	} else pattern_result = 0;
++	read_unlock(&ct_lock);
++
++	if(pattern_result) {
++		write_lock(&ct_lock);
++		master_conntrack->layer7.app_proto = kmalloc(strlen(info->protocol)+1, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_proto){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
++			write_unlock(&ct_lock);
++			return (pattern_result ^ info->invert);
++		}
++		strcpy(master_conntrack->layer7.app_proto, info->protocol);
++		write_unlock(&ct_lock);
++	}
++
++	/* mark the packet seen */
++	skb->cb[0] = 1;
++
++	return (pattern_result ^ info->invert);
++}
++
++static int checkentry(const char *tablename, const void *ip,
++	const struct xt_match *match, void *matchinfo, unsigned int matchsize,
++	unsigned int hook_mask)
++{
++//        struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
++
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_layer7_info)))
++		return 0;
++
++	return 1;
++}
++
++static struct ipt_match layer7_match = {
++	.name = "layer7",
<<Diff was trimmed, longer than 597 lines>>


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