diff options
Diffstat (limited to 'recipes/linux/linux-magicbox-2.6.19.2/101-netfilter_layer7_pktmatch.patch')
| -rw-r--r-- | recipes/linux/linux-magicbox-2.6.19.2/101-netfilter_layer7_pktmatch.patch | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/recipes/linux/linux-magicbox-2.6.19.2/101-netfilter_layer7_pktmatch.patch b/recipes/linux/linux-magicbox-2.6.19.2/101-netfilter_layer7_pktmatch.patch new file mode 100644 index 0000000000..3d1e4819d6 --- /dev/null +++ b/recipes/linux/linux-magicbox-2.6.19.2/101-netfilter_layer7_pktmatch.patch @@ -0,0 +1,108 @@ +diff -ur linux.dev/include/linux/netfilter_ipv4/ipt_layer7.h linux.dev2/include/linux/netfilter_ipv4/ipt_layer7.h +--- linux.dev/include/linux/netfilter_ipv4/ipt_layer7.h 2007-01-01 05:18:48.000000000 +0100 ++++ linux.dev2/include/linux/netfilter_ipv4/ipt_layer7.h 2007-01-01 05:30:46.000000000 +0100 +@@ -21,6 +21,7 @@ + char protocol[MAX_PROTOCOL_LEN]; + char invert:1; + char pattern[MAX_PATTERN_LEN]; ++ char pkt; + }; + + #endif /* _IPT_LAYER7_H */ +diff -ur linux.dev/net/ipv4/netfilter/ipt_layer7.c linux.dev2/net/ipv4/netfilter/ipt_layer7.c +--- linux.dev/net/ipv4/netfilter/ipt_layer7.c 2007-01-01 05:18:48.000000000 +0100 ++++ linux.dev2/net/ipv4/netfilter/ipt_layer7.c 2007-01-01 05:30:46.000000000 +0100 +@@ -296,33 +296,34 @@ + } + } + +-/* 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) ++static int add_datastr(char *target, int offset, char *app_data, int len) + { + 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; ++ if(!target) 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++) { ++ for(i = 0; i < maxdatalen-offset-1 && i < len; i++) { + if(app_data[i] != '\0') { +- master_conntrack->layer7.app_data[length+oldlength] = ++ target[length+offset] = + /* the kernel version of tolower mungs 'upper ascii' */ + isascii(app_data[i])? tolower(app_data[i]) : app_data[i]; + length++; + } + } ++ target[length+offset] = '\0'; + +- 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, ++ 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; + enum ip_conntrack_info master_ctinfo, ctinfo; + struct ip_conntrack *master_conntrack, *conntrack; +- unsigned char * app_data; ++ unsigned char *app_data, *tmp_data; + unsigned int pattern_result, appdatalen; + regexp * comppattern; + +@@ -362,8 +363,8 @@ + 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) { ++ if(!info->pkt && (TOTAL_PACKETS > num_packets || ++ master_conntrack->layer7.app_proto)) { + + pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info); + +@@ -394,6 +395,23 @@ + comppattern = compile_and_cache(info->pattern, info->protocol); + spin_unlock_bh(&list_lock); + ++ if (info->pkt) { ++ tmp_data = kmalloc(maxdatalen, GFP_ATOMIC); ++ if(!tmp_data){ ++ if (net_ratelimit()) ++ printk(KERN_ERR "layer7: out of memory in match, bailing.\n"); ++ return info->invert; ++ } ++ ++ tmp_data[0] = '\0'; ++ add_datastr(tmp_data, 0, app_data, appdatalen); ++ pattern_result = ((comppattern && regexec(comppattern, tmp_data)) ? 1 : 0); ++ kfree(tmp_data); ++ tmp_data = NULL; ++ ++ return (pattern_result ^ info->invert); ++ } ++ + /* 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) { |