[kernel] 2.6.27: revert case insensitive match support in xt_string while we are using iptables-1.4.0

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12862 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic-2.6/patches-2.6.27/952-revert_xt_string_case_insensitive_match.patch

@@ -0,0 +1,112 @@
+--- a/include/linux/netfilter/xt_string.h
++++ b/include/linux/netfilter/xt_string.h
+@@ -4,11 +4,6 @@
+ #define XT_STRING_MAX_PATTERN_SIZE 128
+ #define XT_STRING_MAX_ALGO_NAME_SIZE 16
+ 
+-enum {
+-	XT_STRING_FLAG_INVERT		= 0x01,
+-	XT_STRING_FLAG_IGNORECASE	= 0x02
+-};
+-
+ struct xt_string_info
+ {
+ 	u_int16_t from_offset;
+@@ -16,15 +11,7 @@
+ 	char	  algo[XT_STRING_MAX_ALGO_NAME_SIZE];
+ 	char 	  pattern[XT_STRING_MAX_PATTERN_SIZE];
+ 	u_int8_t  patlen;
+-	union {
+-		struct {
+-			u_int8_t  invert;
+-		} v0;
+-
+-		struct {
+-			u_int8_t  flags;
+-		} v1;
+-	} u;
++	u_int8_t  invert;
+ 
+ 	/* Used internally by the kernel */
+ 	struct ts_config __attribute__((aligned(8))) *config;
+--- a/net/netfilter/xt_string.c
++++ b/net/netfilter/xt_string.c
+@@ -29,16 +29,12 @@
+ {
+ 	const struct xt_string_info *conf = matchinfo;
+ 	struct ts_state state;
+-	int invert;
+ 
+ 	memset(&state, 0, sizeof(struct ts_state));
+ 
+-	invert = (match->revision == 0 ? conf->u.v0.invert :
+-				    conf->u.v1.flags & XT_STRING_FLAG_INVERT);
+-
+ 	return (skb_find_text((struct sk_buff *)skb, conf->from_offset,
+ 			     conf->to_offset, conf->config, &state)
+-			     != UINT_MAX) ^ invert;
++			     != UINT_MAX) ^ conf->invert;
+ }
+ 
+ #define STRING_TEXT_PRIV(m) ((struct xt_string_info *)(m))
+@@ -50,7 +46,6 @@
+ {
+ 	struct xt_string_info *conf = matchinfo;
+ 	struct ts_config *ts_conf;
+-	int flags = TS_AUTOLOAD;
+ 
+ 	/* Damn, can't handle this case properly with iptables... */
+ 	if (conf->from_offset > conf->to_offset)
+@@ -59,15 +54,8 @@
+ 		return false;
+ 	if (conf->patlen > XT_STRING_MAX_PATTERN_SIZE)
+ 		return false;
+-	if (match->revision == 1) {
+-		if (conf->u.v1.flags &
+-		    ~(XT_STRING_FLAG_IGNORECASE | XT_STRING_FLAG_INVERT))
+-			return false;
+-		if (conf->u.v1.flags & XT_STRING_FLAG_IGNORECASE)
+-			flags |= TS_IGNORECASE;
+-	}
+ 	ts_conf = textsearch_prepare(conf->algo, conf->pattern, conf->patlen,
+-				     GFP_KERNEL, flags);
++				     GFP_KERNEL, TS_AUTOLOAD);
+ 	if (IS_ERR(ts_conf))
+ 		return false;
+ 
+@@ -84,17 +72,6 @@
+ static struct xt_match string_mt_reg[] __read_mostly = {
+ 	{
+ 		.name 		= "string",
+-		.revision	= 0,
+-		.family		= AF_INET,
+-		.checkentry	= string_mt_check,
+-		.match 		= string_mt,
+-		.destroy 	= string_mt_destroy,
+-		.matchsize	= sizeof(struct xt_string_info),
+-		.me 		= THIS_MODULE
+-	},
+-	{
+-		.name 		= "string",
+-		.revision	= 1,
+ 		.family		= AF_INET,
+ 		.checkentry	= string_mt_check,
+ 		.match 		= string_mt,
+@@ -104,17 +81,6 @@
+ 	},
+ 	{
+ 		.name 		= "string",
+-		.revision	= 0,
+-		.family		= AF_INET6,
+-		.checkentry	= string_mt_check,
+-		.match 		= string_mt,
+-		.destroy 	= string_mt_destroy,
+-		.matchsize	= sizeof(struct xt_string_info),
+-		.me 		= THIS_MODULE
+-	},
+-	{
+-		.name 		= "string",
+-		.revision	= 1,
+ 		.family		= AF_INET6,
+ 		.checkentry	= string_mt_check,
+ 		.match 		= string_mt,