[NETFILTER]: nf_conntrack_sip: update copyright

[safe/jmp/linux-2.6] / net / netfilter / xt_string.c

diff --git a/net/netfilter/xt_string.c b/net/netfilter/xt_string.c
index 703d80f..72f694d 100644 (file)
--- a/net/netfilter/xt_string.c
+++ b/net/netfilter/xt_string.c
@@ -1,5 +1,5 @@
 /* String matching match for iptables
- * 
+ *
  * (C) 2005 Pablo Neira Ayuso <pablo@eurodev.net>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -16,100 +16,89 @@
 #include <linux/textsearch.h>
 
 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@eurodev.net>");
-MODULE_DESCRIPTION("IP tables string match module");
+MODULE_DESCRIPTION("Xtables: string-based matching");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("ipt_string");
 MODULE_ALIAS("ip6t_string");
 
-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)
+static bool
+string_mt(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,
+          bool *hotdrop)
 {
+       const struct xt_string_info *conf = matchinfo;
        struct ts_state state;
-       struct xt_string_info *conf = (struct xt_string_info *) matchinfo;
 
        memset(&state, 0, sizeof(struct ts_state));
 
-       return (skb_find_text((struct sk_buff *)skb, conf->from_offset, 
-                            conf->to_offset, conf->config, &state) 
-                            != UINT_MAX) && !conf->invert;
+       return (skb_find_text((struct sk_buff *)skb, conf->from_offset,
+                            conf->to_offset, conf->config, &state)
+                            != UINT_MAX) ^ conf->invert;
 }
 
-#define STRING_TEXT_PRIV(m) ((struct xt_string_info *) m)
+#define STRING_TEXT_PRIV(m) ((struct xt_string_info *)(m))
 
-static int checkentry(const char *tablename,
-                     const void *ip,
-                     const struct xt_match *match,
-                     void *matchinfo,
-                     unsigned int matchsize,
-                     unsigned int hook_mask)
+static bool
+string_mt_check(const char *tablename, const void *ip,
+                const struct xt_match *match, void *matchinfo,
+                unsigned int hook_mask)
 {
        struct xt_string_info *conf = matchinfo;
        struct ts_config *ts_conf;
 
        /* Damn, can't handle this case properly with iptables... */
        if (conf->from_offset > conf->to_offset)
-               return 0;
-
+               return false;
+       if (conf->algo[XT_STRING_MAX_ALGO_NAME_SIZE - 1] != '\0')
+               return false;
+       if (conf->patlen > XT_STRING_MAX_PATTERN_SIZE)
+               return false;
        ts_conf = textsearch_prepare(conf->algo, conf->pattern, conf->patlen,
                                     GFP_KERNEL, TS_AUTOLOAD);
        if (IS_ERR(ts_conf))
-               return 0;
+               return false;
 
        conf->config = ts_conf;
 
-       return 1;
+       return true;
 }
 
-static void destroy(const struct xt_match *match, void *matchinfo,
-                   unsigned int matchsize)
+static void string_mt_destroy(const struct xt_match *match, void *matchinfo)
 {
        textsearch_destroy(STRING_TEXT_PRIV(matchinfo)->config);
 }
 
-static struct xt_match string_match = {
-       .name           = "string",
-       .match          = match,
-       .matchsize      = sizeof(struct xt_string_info),
-       .checkentry     = checkentry,
-       .destroy        = destroy,
-       .family         = AF_INET,
-       .me             = THIS_MODULE
-};
-static struct xt_match string6_match = {
-       .name           = "string",
-       .match          = match,
-       .matchsize      = sizeof(struct xt_string_info),
-       .checkentry     = checkentry,
-       .destroy        = destroy,
-       .family         = AF_INET6,
-       .me             = THIS_MODULE
+static struct xt_match string_mt_reg[] __read_mostly = {
+       {
+               .name           = "string",
+               .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",
+               .family         = AF_INET6,
+               .checkentry     = string_mt_check,
+               .match          = string_mt,
+               .destroy        = string_mt_destroy,
+               .matchsize      = sizeof(struct xt_string_info),
+               .me             = THIS_MODULE
+       },
 };
 
-static int __init init(void)
+static int __init string_mt_init(void)
 {
-       int ret;
-
-       ret = xt_register_match(&string_match);
-       if (ret)
-               return ret;
-       ret = xt_register_match(&string6_match);
-       if (ret)
-               xt_unregister_match(&string_match);
-
-       return ret;
+       return xt_register_matches(string_mt_reg, ARRAY_SIZE(string_mt_reg));
 }
 
-static void __exit fini(void)
+static void __exit string_mt_exit(void)
 {
-       xt_unregister_match(&string_match);
-       xt_unregister_match(&string6_match);
+       xt_unregister_matches(string_mt_reg, ARRAY_SIZE(string_mt_reg));
 }
 
-module_init(init);
-module_exit(fini);
+module_init(string_mt_init);
+module_exit(string_mt_exit);