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upgrade layer7 to the latest version and add fixes for 2.6.21 and 2.6.22-rc - compile tested on .21, run time tested on .22-rc6

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SVN-Revision: 7846
This commit is contained in:
Felix Fietkau 2007-07-02 02:10:01 +00:00
parent 46d194834b
commit 9801602a93
4 changed files with 231 additions and 156 deletions
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142
target/linux/generic-2.6/patches-2.6.22/100-netfilter_layer7_2.8.patch → target/linux/generic-2.6/patches-2.6.22/100-netfilter_layer7_2.9.patch
View file

@ -1,6 +1,7 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h 2007-05-26 20:13:52.648130120 +0200
Index: linux-2.6.22-rc6/include/linux/netfilter_ipv4/ipt_layer7.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.22-rc6/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 03:43:29.440242750 +0200
@@ -0,0 +1,26 @@
+/*
+ By Matthew Strait <quadong@users.sf.net>, Dec 2003.
@ -28,9 +29,10 @@ diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6
+};
+
+#endif /* _IPT_LAYER7_H */
diff -urN linux-2.6.21.1.old/net/netfilter/nf_conntrack_core.c linux-2.6.21.1.dev/net/netfilter/nf_conntrack_core.c
--- linux-2.6.21.1.old/net/netfilter/nf_conntrack_core.c 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/netfilter/nf_conntrack_core.c 2007-05-26 20:13:52.649129968 +0200
Index: linux-2.6.22-rc6/net/netfilter/nf_conntrack_core.c
===================================================================
--- linux-2.6.22-rc6.orig/net/netfilter/nf_conntrack_core.c 2007-07-02 02:16:21.833537750 +0200
+++ linux-2.6.22-rc6/net/netfilter/nf_conntrack_core.c 2007-07-02 02:16:23.497641750 +0200
@@ -330,6 +330,13 @@
* too. */
nf_ct_remove_expectations(ct);
@ -45,9 +47,10 @@ diff -urN linux-2.6.21.1.old/net/netfilter/nf_conntrack_core.c linux-2.6.21.1.de
/* We overload first tuple to link into unconfirmed list. */
if (!nf_ct_is_confirmed(ct)) {
BUG_ON(list_empty(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list));
diff -urN linux-2.6.21.1.old/net/netfilter/nf_conntrack_standalone.c linux-2.6.21.1.dev/net/netfilter/nf_conntrack_standalone.c
--- linux-2.6.21.1.old/net/netfilter/nf_conntrack_standalone.c 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/netfilter/nf_conntrack_standalone.c 2007-05-26 20:13:52.649129968 +0200
Index: linux-2.6.22-rc6/net/netfilter/nf_conntrack_standalone.c
===================================================================
--- linux-2.6.22-rc6.orig/net/netfilter/nf_conntrack_standalone.c 2007-07-02 02:16:21.845538500 +0200
+++ linux-2.6.22-rc6/net/netfilter/nf_conntrack_standalone.c 2007-07-02 02:16:23.521643250 +0200
@@ -184,6 +184,12 @@
return -ENOSPC;
#endif
@ -61,10 +64,11 @@ diff -urN linux-2.6.21.1.old/net/netfilter/nf_conntrack_standalone.c linux-2.6.2
if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
return -ENOSPC;
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c 2007-05-26 20:13:52.650129816 +0200
@@ -0,0 +1,573 @@
Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 03:43:44.341174000 +0200
@@ -0,0 +1,583 @@
+/*
+ Kernel module to match application layer (OSI layer 7) data in connections.
+
@ -80,15 +84,18 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+
+ Based on ipt_string.c (C) 2000 Emmanuel Roger <winfield@freegates.be>
+ and cls_layer7.c (C) 2003 Matthew Strait, Ethan Sommer, Justin Levandoski
+
+ Jan Engelhardt, 2007-03-11: Arrange to compile with nf_conntrack
+*/
+
+#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 <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_nat_rule.h>
+#include <linux/spinlock.h>
+
+#include "regexp/regexp.c"
@ -282,7 +289,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+{
+ /* In case we are ported somewhere (ebtables?) where ip_hdr(skb)
+ isn't set, this can be gotten from 4*(skb->data[0] & 0x0f) as well. */
+ int ip_hl = ip_hdrlen(skb);
+ int ip_hl = 4*ip_hdr(skb)->ihl;
+
+ if( ip_hdr(skb)->protocol == IPPROTO_TCP ) {
+ /* 12 == offset into TCP header for the header length field.
@ -304,7 +311,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+}
+
+/* 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,
+static int match_no_append(struct nf_conn * conntrack, struct nf_conn * master_conntrack,
+ enum ip_conntrack_info ctinfo, enum ip_conntrack_info master_ctinfo,
+ struct ipt_layer7_info * info)
+{
@ -364,7 +371,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+}
+
+/* add the new app data to the conntrack. Return number of bytes added. */
+static int add_data(struct ip_conntrack * master_conntrack,
+static int add_data(struct nf_conn * master_conntrack,
+ char * app_data, int appdatalen)
+{
+ int length = 0, i;
@ -405,7 +412,8 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+
+ struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
+ enum ip_conntrack_info master_ctinfo, ctinfo;
+ struct ip_conntrack *master_conntrack, *conntrack;
+ struct nf_conn *master_conntrack;
+ struct nf_conn *conntrack;
+ unsigned char * app_data;
+ unsigned int pattern_result, appdatalen;
+ regexp * comppattern;
@ -418,9 +426,8 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ /* 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");
+ if(((conntrack = nf_ct_get((struct sk_buff *)skb, &ctinfo)) == NULL) ||
+ ((master_conntrack = nf_ct_get((struct sk_buff *)skb, &master_ctinfo)) == NULL)) {
+ return info->invert;
+ }
+
@ -434,11 +441,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+
+ 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
+ /* skb->cb[0] == seen. Don't do things twice if there are multiple l7
+ rules. I'm not sure that using cb for this purpose is correct, even though
+ 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? */
+ is being used for anything else in the skbs that make it here. */
+ skb->cb[0] = 1; /* marking it seen here is probably irrelevant, but consistant */
+
+ return (pattern_result ^ info->invert);
@ -499,6 +505,11 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ read_lock(&ct_lock);
+ if(!strcmp(info->protocol, "unknown")) {
+ pattern_result = 0;
+ /* If looking for "unset", then always match. "Unset" means that we
+ haven't yet classified the connection. */
+ } else if(!strcmp(info->protocol, "unset")) {
+ pattern_result = 2;
+ DPRINTK("layer7: matched unset: not yet classified (%d/%d packets)\n", TOTAL_PACKETS, num_packets);
+ /* 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);
@ -506,7 +517,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ } else pattern_result = 0;
+ read_unlock(&ct_lock);
+
+ if(pattern_result) {
+ if(pattern_result == 1) {
+ write_lock(&ct_lock);
+ master_conntrack->layer7.app_proto = kmalloc(strlen(info->protocol)+1, GFP_ATOMIC);
+ if(!master_conntrack->layer7.app_proto){
@ -517,6 +528,8 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ }
+ strcpy(master_conntrack->layer7.app_proto, info->protocol);
+ write_unlock(&ct_lock);
+ } else if(pattern_result > 1) { /* cleanup from "unset" */
+ pattern_result = 1;
+ }
+
+ /* mark the packet seen */
@ -525,10 +538,11 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ return (pattern_result ^ info->invert);
+}
+
+static struct ipt_match layer7_match = {
+static struct xt_match layer7_match = {
+ .name = "layer7",
+ .match = &match,
+ .matchsize = sizeof(struct ipt_layer7_info),
+ .family = AF_INET,
+ .me = THIS_MODULE
+};
+
@ -627,27 +641,28 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ printk(KERN_WARNING "layer7: maxdatalen can't be > 65536, using 65536\n");
+ maxdatalen = 65536;
+ }
+ return ipt_register_match(&layer7_match);
+ return xt_register_match(&layer7_match);
+}
+
+static void __exit ipt_layer7_fini(void)
+{
+ layer7_cleanup_proc();
+ ipt_unregister_match(&layer7_match);
+ xt_unregister_match(&layer7_match);
+}
+
+module_init(ipt_layer7_init);
+module_exit(ipt_layer7_fini);
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig
--- linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig 2007-05-26 20:13:52.650129816 +0200
Index: linux-2.6.22-rc6/net/ipv4/netfilter/Kconfig
===================================================================
--- linux-2.6.22-rc6.orig/net/ipv4/netfilter/Kconfig 2007-07-02 02:16:21.857539250 +0200
+++ linux-2.6.22-rc6/net/ipv4/netfilter/Kconfig 2007-07-02 03:43:29.324235500 +0200
@@ -63,6 +63,24 @@
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
+ depends on IP_NF_IPTABLES && NF_CT_ACCT && 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
@ -666,9 +681,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/i
config IP_NF_MATCH_TOS
tristate "TOS match support"
depends on IP_NF_IPTABLES
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Makefile linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile
--- linux-2.6.21.1.old/net/ipv4/netfilter/Makefile 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile 2007-05-26 20:13:52.651129664 +0200
Index: linux-2.6.22-rc6/net/ipv4/netfilter/Makefile
===================================================================
--- linux-2.6.22-rc6.orig/net/ipv4/netfilter/Makefile 2007-07-02 02:16:21.865539750 +0200
+++ linux-2.6.22-rc6/net/ipv4/netfilter/Makefile 2007-07-02 03:43:29.336236250 +0200
@@ -50,6 +50,8 @@
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
@ -678,9 +694,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Makefile linux-2.6.21.1.dev/net/
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.c linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.c 2007-05-26 20:13:52.652129512 +0200
Index: linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regexp.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regexp.c 2007-07-02 02:35:33.797531000 +0200
@@ -0,0 +1,1197 @@
+/*
+ * regcomp and regexec -- regsub and regerror are elsewhere
@ -1879,9 +1896,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.c linux-2.6.21.1.d
+#endif
+
+
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.h linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.h
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.h 2007-05-26 20:13:52.652129512 +0200
Index: linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regexp.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regexp.h 2007-07-02 02:16:23.677653000 +0200
@@ -0,0 +1,41 @@
+/*
+ * Definitions etc. for regexp(3) routines.
@ -1924,18 +1942,20 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.h linux-2.6.21.1.d
+void regerror(char *s);
+
+#endif
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regmagic.h linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regmagic.h
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regmagic.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regmagic.h 2007-05-26 20:13:52.652129512 +0200
Index: linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regmagic.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regmagic.h 2007-07-02 02:16:23.701654500 +0200
@@ -0,0 +1,5 @@
+/*
+ * The first byte of the regexp internal "program" is actually this magic
+ * number; the start node begins in the second byte.
+ */
+#define MAGIC 0234
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regsub.c linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regsub.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regsub.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regsub.c 2007-05-26 20:13:52.653129360 +0200
Index: linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regsub.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.22-rc6/net/ipv4/netfilter/regexp/regsub.c 2007-07-02 02:35:46.074298250 +0200
@@ -0,0 +1,95 @@
+/*
+ * regsub
@ -2032,3 +2052,29 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regsub.c linux-2.6.21.1.d
+ }
+ *dst++ = '\0';
+}
Index: linux-2.6.22-rc6/include/net/netfilter/nf_conntrack.h
===================================================================
--- linux-2.6.22-rc6.orig/include/net/netfilter/nf_conntrack.h 2007-07-02 02:16:21.825537250 +0200
+++ linux-2.6.22-rc6/include/net/netfilter/nf_conntrack.h 2007-07-02 02:16:23.749657500 +0200
@@ -128,6 +128,21 @@
u_int32_t secmark;
#endif
+#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
+ struct {
+ /*
+ * e.g. "http". NULL before decision. "unknown" after decision
+ * if no match.
+ */
+ char *app_proto;
+ /*
+ * application layer data so far. NULL after match decision.
+ */
+ char *app_data;
+ unsigned int app_data_len;
+ } layer7;
+#endif
+
/* Storage reserved for other modules: */
union nf_conntrack_proto proto;

43
target/linux/generic-2.6/patches-2.6.22/101-netfilter_layer7_pktmatch.patch
View file

@ -1,6 +1,7 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h 2007-05-26 20:17:47.624408296 +0200
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h 2007-05-26 20:17:48.729240336 +0200
Index: linux-2.6.22-rc6/include/linux/netfilter_ipv4/ipt_layer7.h
===================================================================
--- linux-2.6.22-rc6.orig/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 03:23:28.597194750 +0200
+++ linux-2.6.22-rc6/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 03:23:44.730203000 +0200
@@ -21,6 +21,7 @@
char protocol[MAX_PROTOCOL_LEN];
char invert:1;
@ -9,15 +10,15 @@ diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6
};
#endif /* _IPT_LAYER7_H */
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c 2007-05-26 20:17:47.626407992 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c 2007-05-26 20:17:48.729240336 +0200
@@ -296,33 +296,34 @@
}
Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
===================================================================
--- linux-2.6.22-rc6.orig/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 03:23:28.609195500 +0200
+++ linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 03:23:54.234797000 +0200
@@ -300,33 +300,34 @@
}
-/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct ip_conntrack * master_conntrack,
/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct nf_conn * master_conntrack,
- char * app_data, int appdatalen)
+static int add_datastr(char *target, int offset, char *app_data, int len)
{
@ -45,33 +46,33 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
}
}
+ target[length+offset] = '\0';
+
+ return length;
+}
- master_conntrack->layer7.app_data[length+oldlength] = '\0';
- master_conntrack->layer7.app_data_len = length + oldlength;
+ return length;
+}
+
+/* add the new app data to the conntrack. Return number of bytes added. */
+static int add_data(struct ip_conntrack * master_conntrack,
+static int add_data(struct nf_conn * master_conntrack,
+ char * app_data, int appdatalen)
+{
+ int length;
+
+ length = add_datastr(master_conntrack->layer7.app_data, master_conntrack->layer7.app_data_len, app_data, appdatalen);
+ master_conntrack->layer7.app_data_len += length;
return length;
}
@@ -339,7 +340,7 @@
struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
@@ -343,7 +344,7 @@
enum ip_conntrack_info master_ctinfo, ctinfo;
struct ip_conntrack *master_conntrack, *conntrack;
struct nf_conn *master_conntrack;
struct nf_conn *conntrack;
- unsigned char * app_data;
+ unsigned char *app_data, *tmp_data;
unsigned int pattern_result, appdatalen;
regexp * comppattern;
@@ -362,8 +363,8 @@
@@ -365,8 +366,8 @@
master_conntrack = master_ct(master_conntrack);
/* if we've classified it or seen too many packets */
@ -82,7 +83,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
@@ -394,6 +395,23 @@
@@ -396,6 +397,23 @@
comppattern = compile_and_cache(info->pattern, info->protocol);
spin_unlock_bh(&list_lock);

156
target/linux/generic-2.6/patches/100-netfilter_layer7_2.8.patch → target/linux/generic-2.6/patches/100-netfilter_layer7_2.9.patch
View file

@ -1,25 +1,7 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ip_conntrack.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ip_conntrack.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ip_conntrack.h 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ip_conntrack.h 2007-05-26 20:13:52.648130120 +0200
@@ -128,6 +128,15 @@
/* 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
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h 2007-05-26 20:13:52.648130120 +0200
Index: linux-2.6.21.5/include/linux/netfilter_ipv4/ipt_layer7.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.21.5/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 00:43:58.271086750 +0200
@@ -0,0 +1,26 @@
+/*
+ By Matthew Strait <quadong@users.sf.net>, Dec 2003.
@ -47,10 +29,11 @@ diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6
+};
+
+#endif /* _IPT_LAYER7_H */
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ip_conntrack_core.c linux-2.6.21.1.dev/net/ipv4/netfilter/ip_conntrack_core.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ip_conntrack_core.c 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ip_conntrack_core.c 2007-05-26 20:13:52.649129968 +0200
@@ -337,6 +337,13 @@
Index: linux-2.6.21.5/net/ipv4/netfilter/ip_conntrack_core.c
===================================================================
--- linux-2.6.21.5.orig/net/ipv4/netfilter/ip_conntrack_core.c 2007-07-02 00:37:53.432285750 +0200
+++ linux-2.6.21.5/net/ipv4/netfilter/ip_conntrack_core.c 2007-07-02 00:37:55.496414750 +0200
@@ -332,6 +332,13 @@
* too. */
ip_ct_remove_expectations(ct);
@ -64,9 +47,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ip_conntrack_core.c linux-2.6.21
/* We overload first tuple to link into unconfirmed list. */
if (!is_confirmed(ct)) {
BUG_ON(list_empty(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list));
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ip_conntrack_standalone.c linux-2.6.21.1.dev/net/ipv4/netfilter/ip_conntrack_standalone.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ip_conntrack_standalone.c 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ip_conntrack_standalone.c 2007-05-26 20:13:52.649129968 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/ip_conntrack_standalone.c
===================================================================
--- linux-2.6.21.5.orig/net/ipv4/netfilter/ip_conntrack_standalone.c 2007-07-02 00:37:53.440286250 +0200
+++ linux-2.6.21.5/net/ipv4/netfilter/ip_conntrack_standalone.c 2007-07-02 00:37:55.544417750 +0200
@@ -188,6 +188,12 @@
return -ENOSPC;
#endif
@ -80,10 +64,11 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ip_conntrack_standalone.c linux-
if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
return -ENOSPC;
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c 2007-05-26 20:13:52.650129816 +0200
@@ -0,0 +1,573 @@
Index: linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 01:27:54.195821750 +0200
@@ -0,0 +1,582 @@
+/*
+ Kernel module to match application layer (OSI layer 7) data in connections.
+
@ -99,15 +84,18 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+
+ Based on ipt_string.c (C) 2000 Emmanuel Roger <winfield@freegates.be>
+ and cls_layer7.c (C) 2003 Matthew Strait, Ethan Sommer, Justin Levandoski
+
+ Jan Engelhardt, 2007-03-11: Arrange to compile with nf_conntrack
+*/
+
+#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 <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_nat_rule.h>
+#include <linux/spinlock.h>
+
+#include "regexp/regexp.c"
@ -424,7 +412,8 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+
+ struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
+ enum ip_conntrack_info master_ctinfo, ctinfo;
+ struct ip_conntrack *master_conntrack, *conntrack;
+ struct nf_conn *master_conntrack;
+ struct ip_conntrack *conntrack;
+ unsigned char * app_data;
+ unsigned int pattern_result, appdatalen;
+ regexp * comppattern;
@ -437,9 +426,8 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ /* 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");
+ if(((conntrack = ip_conntrack_get((struct sk_buff *)skb, &ctinfo)) == NULL) ||
+ ((master_conntrack = ip_conntrack_get((struct sk_buff *)skb, &master_ctinfo)) == NULL)) {
+ return info->invert;
+ }
+
@ -453,11 +441,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+
+ 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
+ /* skb->cb[0] == seen. Don't do things twice if there are multiple l7
+ rules. I'm not sure that using cb for this purpose is correct, even though
+ 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? */
+ is being used for anything else in the skbs that make it here. */
+ skb->cb[0] = 1; /* marking it seen here is probably irrelevant, but consistant */
+
+ return (pattern_result ^ info->invert);
@ -518,6 +505,11 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ read_lock(&ct_lock);
+ if(!strcmp(info->protocol, "unknown")) {
+ pattern_result = 0;
+ /* If looking for "unset", then always match. "Unset" means that we
+ haven't yet classified the connection. */
+ } else if(!strcmp(info->protocol, "unset")) {
+ pattern_result = 2;
+ DPRINTK("layer7: matched unset: not yet classified (%d/%d packets)\n", TOTAL_PACKETS, num_packets);
+ /* 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);
@ -525,7 +517,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ } else pattern_result = 0;
+ read_unlock(&ct_lock);
+
+ if(pattern_result) {
+ if(pattern_result == 1) {
+ write_lock(&ct_lock);
+ master_conntrack->layer7.app_proto = kmalloc(strlen(info->protocol)+1, GFP_ATOMIC);
+ if(!master_conntrack->layer7.app_proto){
@ -536,6 +528,8 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ }
+ strcpy(master_conntrack->layer7.app_proto, info->protocol);
+ write_unlock(&ct_lock);
+ } else if(pattern_result > 1) { /* cleanup from "unset" */
+ pattern_result = 1;
+ }
+
+ /* mark the packet seen */
@ -544,7 +538,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ return (pattern_result ^ info->invert);
+}
+
+static struct ipt_match layer7_match = {
+static struct xt_match layer7_match = {
+ .name = "layer7",
+ .match = &match,
+ .matchsize = sizeof(struct ipt_layer7_info),
@ -646,27 +640,28 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
+ printk(KERN_WARNING "layer7: maxdatalen can't be > 65536, using 65536\n");
+ maxdatalen = 65536;
+ }
+ return ipt_register_match(&layer7_match);
+ return xt_register_match(&layer7_match);
+}
+
+static void __exit ipt_layer7_fini(void)
+{
+ layer7_cleanup_proc();
+ ipt_unregister_match(&layer7_match);
+ xt_unregister_match(&layer7_match);
+}
+
+module_init(ipt_layer7_init);
+module_exit(ipt_layer7_fini);
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig
--- linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig 2007-05-26 20:13:52.650129816 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/Kconfig
===================================================================
--- linux-2.6.21.5.orig/net/ipv4/netfilter/Kconfig 2007-07-02 00:37:53.456287250 +0200
+++ linux-2.6.21.5/net/ipv4/netfilter/Kconfig 2007-07-02 01:21:17.231013000 +0200
@@ -245,6 +245,24 @@
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
+ depends on IP_NF_IPTABLES && NF_CT_ACCT && 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
@ -685,9 +680,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/i
config IP_NF_MATCH_TOS
tristate "TOS match support"
depends on IP_NF_IPTABLES
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Makefile linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile
--- linux-2.6.21.1.old/net/ipv4/netfilter/Makefile 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile 2007-05-26 20:13:52.651129664 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/Makefile
===================================================================
--- linux-2.6.21.5.orig/net/ipv4/netfilter/Makefile 2007-07-02 00:37:53.464287750 +0200
+++ linux-2.6.21.5/net/ipv4/netfilter/Makefile 2007-07-02 00:43:58.191081750 +0200
@@ -92,6 +92,8 @@
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
@ -697,9 +693,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Makefile linux-2.6.21.1.dev/net/
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.c linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.c 2007-05-26 20:13:52.652129512 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/regexp/regexp.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.21.5/net/ipv4/netfilter/regexp/regexp.c 2007-07-02 00:37:55.648424250 +0200
@@ -0,0 +1,1197 @@
+/*
+ * regcomp and regexec -- regsub and regerror are elsewhere
@ -1898,9 +1895,10 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.c linux-2.6.21.1.d
+#endif
+
+
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.h linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.h
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regexp.h 2007-05-26 20:13:52.652129512 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/regexp/regexp.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.21.5/net/ipv4/netfilter/regexp/regexp.h 2007-07-02 00:37:55.700427500 +0200
@@ -0,0 +1,41 @@
+/*
+ * Definitions etc. for regexp(3) routines.
@ -1943,18 +1941,20 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regexp.h linux-2.6.21.1.d
+void regerror(char *s);
+
+#endif
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regmagic.h linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regmagic.h
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regmagic.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regmagic.h 2007-05-26 20:13:52.652129512 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/regexp/regmagic.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.21.5/net/ipv4/netfilter/regexp/regmagic.h 2007-07-02 00:37:55.724429000 +0200
@@ -0,0 +1,5 @@
+/*
+ * The first byte of the regexp internal "program" is actually this magic
+ * number; the start node begins in the second byte.
+ */
+#define MAGIC 0234
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regsub.c linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regsub.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regsub.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/regexp/regsub.c 2007-05-26 20:13:52.653129360 +0200
Index: linux-2.6.21.5/net/ipv4/netfilter/regexp/regsub.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.21.5/net/ipv4/netfilter/regexp/regsub.c 2007-07-02 00:37:55.752430750 +0200
@@ -0,0 +1,95 @@
+/*
+ * regsub
@ -2051,3 +2051,29 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/regexp/regsub.c linux-2.6.21.1.d
+ }
+ *dst++ = '\0';
+}
Index: linux-2.6.21.5/include/net/netfilter/nf_conntrack.h
===================================================================
--- linux-2.6.21.5.orig/include/net/netfilter/nf_conntrack.h 2007-07-02 00:49:22.815369500 +0200
+++ linux-2.6.21.5/include/net/netfilter/nf_conntrack.h 2007-07-02 00:56:21.413530250 +0200
@@ -128,6 +128,21 @@
u_int32_t secmark;
#endif
+#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
+ struct {
+ /*
+ * e.g. "http". NULL before decision. "unknown" after decision
+ * if no match.
+ */
+ char *app_proto;
+ /*
+ * application layer data so far. NULL after match decision.
+ */
+ char *app_data;
+ unsigned int app_data_len;
+ } layer7;
+#endif
+
/* Storage reserved for other modules: */
union nf_conntrack_proto proto;

26
target/linux/generic-2.6/patches/101-netfilter_layer7_pktmatch.patch
View file

@ -1,6 +1,7 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h 2007-05-26 20:17:47.624408296 +0200
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_layer7.h 2007-05-26 20:17:48.729240336 +0200
Index: linux-2.6.21.5/include/linux/netfilter_ipv4/ipt_layer7.h
===================================================================
--- linux-2.6.21.5.orig/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 00:43:58.271086750 +0200
+++ linux-2.6.21.5/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 01:36:08.914739750 +0200
@@ -21,6 +21,7 @@
char protocol[MAX_PROTOCOL_LEN];
char invert:1;
@ -9,10 +10,11 @@ diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.6
};
#endif /* _IPT_LAYER7_H */
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c 2007-05-26 20:17:47.626407992 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_layer7.c 2007-05-26 20:17:48.729240336 +0200
@@ -296,33 +296,34 @@
Index: linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c
===================================================================
--- linux-2.6.21.5.orig/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 01:27:54.195821750 +0200
+++ linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 01:37:01.990056750 +0200
@@ -299,33 +299,34 @@
}
}
@ -62,16 +64,16 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
return length;
}
@@ -339,7 +340,7 @@
struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
@@ -343,7 +344,7 @@
enum ip_conntrack_info master_ctinfo, ctinfo;
struct ip_conntrack *master_conntrack, *conntrack;
struct nf_conn *master_conntrack;
struct ip_conntrack *conntrack;
- unsigned char * app_data;
+ unsigned char *app_data, *tmp_data;
unsigned int pattern_result, appdatalen;
regexp * comppattern;
@@ -362,8 +363,8 @@
@@ -365,8 +366,8 @@
master_conntrack = master_ct(master_conntrack);
/* if we've classified it or seen too many packets */
@ -82,7 +84,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_layer7.c linux-2.6.21.1.dev/
pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
@@ -394,6 +395,23 @@
@@ -396,6 +397,23 @@
comppattern = compile_and_cache(info->pattern, info->protocol);
spin_unlock_bh(&list_lock);