kernel: reorganize 2.6.37 patches

[openwrt/svn-archive/archive.git] / target / linux / generic / patches-2.6.37 / 601-netfilter_layer7_pktmatch.patch

diff --git a/target/linux/generic/patches-2.6.37/601-netfilter_layer7_pktmatch.patch b/target/linux/generic/patches-2.6.37/601-netfilter_layer7_pktmatch.patch
new file mode 100644 (file)
index 0000000..f65e301
--- /dev/null
+++ b/target/linux/generic/patches-2.6.37/601-netfilter_layer7_pktmatch.patch
@@ -0,0 +1,108 @@
+--- a/include/linux/netfilter/xt_layer7.h
++++ b/include/linux/netfilter/xt_layer7.h
+@@ -8,6 +8,7 @@ struct xt_layer7_info {
+     char protocol[MAX_PROTOCOL_LEN];
+     char pattern[MAX_PATTERN_LEN];
+     u_int8_t invert;
++    u_int8_t pkt;
+ };
+ 
+ #endif /* _XT_LAYER7_H */
+--- a/net/netfilter/xt_layer7.c
++++ b/net/netfilter/xt_layer7.c
+@@ -314,33 +314,35 @@ static int match_no_append(struct nf_con
+ }
+ 
+ /* 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)
+ {
+       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') {
+                       /* the kernel version of tolower mungs 'upper ascii' */
+-                      master_conntrack->layer7.app_data[length+oldlength] =
++                      target[length+offset] =
+                               isascii(app_data[i])? 
+                                       tolower(app_data[i]) : app_data[i];
+                       length++;
+               }
+       }
++      target[length+offset] = '\0';
++
++      return length;
++}
++
++/* 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)
++{
++      int length;
+ 
+-      master_conntrack->layer7.app_data[length+oldlength] = '\0';
+-      master_conntrack->layer7.app_data_len = length + oldlength;
++      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;
+ }
+@@ -438,7 +440,7 @@ match(const struct sk_buff *skbin,
+ 
+       enum ip_conntrack_info master_ctinfo, ctinfo;
+       struct nf_conn *master_conntrack, *conntrack;
+-      unsigned char * app_data;
++      unsigned char *app_data, *tmp_data;
+       unsigned int pattern_result, appdatalen;
+       regexp * comppattern;
+ 
+@@ -466,8 +468,8 @@ match(const struct sk_buff *skbin,
+               master_conntrack = master_ct(master_conntrack);
+ 
+       /* if we've classified it or seen too many packets */
+-      if(total_acct_packets(master_conntrack) > num_packets ||
+-         master_conntrack->layer7.app_proto) {
++      if(!info->pkt && (total_acct_packets(master_conntrack) > num_packets ||
++         master_conntrack->layer7.app_proto)) {
+ 
+               pattern_result = match_no_append(conntrack, master_conntrack, 
+                                                ctinfo, master_ctinfo, info);
+@@ -500,6 +502,25 @@ match(const struct sk_buff *skbin,
+       /* the return value gets checked later, when we're ready to use it */
+       comppattern = compile_and_cache(info->pattern, info->protocol);
+ 
++      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;
++              spin_unlock_bh(&l7_lock);
++
++              return (pattern_result ^ info->invert);
++      }
++
+       /* On the first packet of a connection, allocate space for app data */
+       if(total_acct_packets(master_conntrack) == 1 && !skb->cb[0] && 
+          !master_conntrack->layer7.app_data){