netfilter: xtables: consolidate code into xt_request_find_match

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

diff --git a/net/netfilter/xt_dscp.c b/net/netfilter/xt_dscp.c
index 35cabca..6ecedc1 100644 (file)
--- a/net/netfilter/xt_dscp.c
+++ b/net/netfilter/xt_dscp.c
@@ -6,96 +6,110 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include <linux/module.h>
 #include <linux/skbuff.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <net/dsfield.h>
 
-#include <linux/netfilter/xt_dscp.h>
 #include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_dscp.h>
 
 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_DESCRIPTION("x_tables DSCP matching module");
+MODULE_DESCRIPTION("Xtables: DSCP/TOS field match");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("ipt_dscp");
 MODULE_ALIAS("ip6t_dscp");
+MODULE_ALIAS("ipt_tos");
+MODULE_ALIAS("ip6t_tos");
 
-static bool 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,
-                 bool *hotdrop)
+static bool
+dscp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-       const struct xt_dscp_info *info = matchinfo;
+       const struct xt_dscp_info *info = par->matchinfo;
        u_int8_t dscp = ipv4_get_dsfield(ip_hdr(skb)) >> XT_DSCP_SHIFT;
 
        return (dscp == info->dscp) ^ !!info->invert;
 }
 
-static bool match6(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)
+static bool
+dscp_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-       const struct xt_dscp_info *info = matchinfo;
+       const struct xt_dscp_info *info = par->matchinfo;
        u_int8_t dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> XT_DSCP_SHIFT;
 
        return (dscp == info->dscp) ^ !!info->invert;
 }
 
-static bool checkentry(const char *tablename,
-                      const void *info,
-                      const struct xt_match *match,
-                      void *matchinfo,
-                      unsigned int hook_mask)
+static bool dscp_mt_check(const struct xt_mtchk_param *par)
 {
-       const u_int8_t dscp = ((struct xt_dscp_info *)matchinfo)->dscp;
+       const struct xt_dscp_info *info = par->matchinfo;
 
-       if (dscp > XT_DSCP_MAX) {
-               printk(KERN_ERR "xt_dscp: dscp %x out of range\n", dscp);
+       if (info->dscp > XT_DSCP_MAX) {
+               pr_info("dscp %x out of range\n", info->dscp);
                return false;
        }
 
        return true;
 }
 
-static struct xt_match xt_dscp_match[] = {
+static bool tos_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+       const struct xt_tos_match_info *info = par->matchinfo;
+
+       if (par->family == NFPROTO_IPV4)
+               return ((ip_hdr(skb)->tos & info->tos_mask) ==
+                      info->tos_value) ^ !!info->invert;
+       else
+               return ((ipv6_get_dsfield(ipv6_hdr(skb)) & info->tos_mask) ==
+                      info->tos_value) ^ !!info->invert;
+}
+
+static struct xt_match dscp_mt_reg[] __read_mostly = {
        {
                .name           = "dscp",
-               .family         = AF_INET,
-               .checkentry     = checkentry,
-               .match          = match,
+               .family         = NFPROTO_IPV4,
+               .checkentry     = dscp_mt_check,
+               .match          = dscp_mt,
                .matchsize      = sizeof(struct xt_dscp_info),
                .me             = THIS_MODULE,
        },
        {
                .name           = "dscp",
-               .family         = AF_INET6,
-               .checkentry     = checkentry,
-               .match          = match6,
+               .family         = NFPROTO_IPV6,
+               .checkentry     = dscp_mt_check,
+               .match          = dscp_mt6,
                .matchsize      = sizeof(struct xt_dscp_info),
                .me             = THIS_MODULE,
        },
+       {
+               .name           = "tos",
+               .revision       = 1,
+               .family         = NFPROTO_IPV4,
+               .match          = tos_mt,
+               .matchsize      = sizeof(struct xt_tos_match_info),
+               .me             = THIS_MODULE,
+       },
+       {
+               .name           = "tos",
+               .revision       = 1,
+               .family         = NFPROTO_IPV6,
+               .match          = tos_mt,
+               .matchsize      = sizeof(struct xt_tos_match_info),
+               .me             = THIS_MODULE,
+       },
 };
 
-static int __init xt_dscp_match_init(void)
+static int __init dscp_mt_init(void)
 {
-       return xt_register_matches(xt_dscp_match, ARRAY_SIZE(xt_dscp_match));
+       return xt_register_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg));
 }
 
-static void __exit xt_dscp_match_fini(void)
+static void __exit dscp_mt_exit(void)
 {
-       xt_unregister_matches(xt_dscp_match, ARRAY_SIZE(xt_dscp_match));
+       xt_unregister_matches(dscp_mt_reg, ARRAY_SIZE(dscp_mt_reg));
 }
 
-module_init(xt_dscp_match_init);
-module_exit(xt_dscp_match_fini);
+module_init(dscp_mt_init);
+module_exit(dscp_mt_exit);