1 files changed, 60 insertions, 48 deletions

diff --git a/net/netfilter/xt_dscp.c b/net/netfilter/xt_dscp.c
index 26c7f4ad102..64670fc5d0e 100644
--- a/net/netfilter/xt_dscp.c
+++ b/net/netfilter/xt_dscp.c
@@ -1,103 +1,115 @@
 /* IP tables module for matching the value of the IPv4/IPv6 DSCP field
  *
- * xt_dscp.c,v 1.3 2002/08/05 19:00:21 laforge Exp
- *
  * (C) 2002 by Harald Welte <laforge@netfilter.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * 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 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
+dscp_mt(const struct sk_buff *skb, struct xt_action_param *par)
 {
-	const struct xt_dscp_info *info = matchinfo;
-	u_int8_t dscp = ipv4_get_dsfield(skb->nh.iph) >> XT_DSCP_SHIFT;
+	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 int 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,
-		  int *hotdrop)
+static bool
+dscp_mt6(const struct sk_buff *skb, struct xt_action_param *par)
 {
-	const struct xt_dscp_info *info = matchinfo;
-	u_int8_t dscp = ipv6_get_dsfield(skb->nh.ipv6h) >> XT_DSCP_SHIFT;
+	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 int checkentry(const char *tablename,
-		      const void *info,
-		      const struct xt_match *match,
-		      void *matchinfo,
-		      unsigned int hook_mask)
+static int 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);
-		return 0;
+	if (info->dscp > XT_DSCP_MAX) {
+		pr_info("dscp %x out of range\n", info->dscp);
+		return -EDOM;
 	}
 
-	return 1;
+	return 0;
+}
+
+static bool tos_mt(const struct sk_buff *skb, struct xt_action_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 xt_dscp_match[] = {
+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);