/* 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
#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>
+#include <linux/netfilter_ipv4/ipt_tos.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, const struct xt_match_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, const struct xt_match_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 matchsize,
- 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);
- return 0;
+ if (info->dscp > XT_DSCP_MAX) {
+ printk(KERN_ERR "xt_dscp: dscp %x out of range\n", info->dscp);
+ return false;
}
- return 1;
+ return true;
+}
+
+static bool
+tos_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+ const struct ipt_tos_info *info = par->matchinfo;
+
+ return (ip_hdr(skb)->tos == info->tos) ^ info->invert;
+}
+
+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->match->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 = 0,
+ .family = NFPROTO_IPV4,
+ .match = tos_mt_v0,
+ .matchsize = sizeof(struct ipt_tos_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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff