diff options
| -rw-r--r-- | include/linux/netfilter/xt_dscp.h | 23 | ||||
| -rw-r--r-- | include/linux/netfilter_ipv4/ipt_dscp.h | 14 | ||||
| -rw-r--r-- | net/ipv4/netfilter/Kconfig | 11 | ||||
| -rw-r--r-- | net/ipv4/netfilter/Makefile | 1 | ||||
| -rw-r--r-- | net/ipv4/netfilter/ipt_dscp.c | 54 | ||||
| -rw-r--r-- | net/netfilter/Kconfig | 11 | ||||
| -rw-r--r-- | net/netfilter/Makefile | 1 | ||||
| -rw-r--r-- | net/netfilter/xt_dscp.c | 113 |
8 files changed, 154 insertions, 74 deletions
diff --git a/include/linux/netfilter/xt_dscp.h b/include/linux/netfilter/xt_dscp.h new file mode 100644 index 000000000000..1da61e6acaf7 --- /dev/null +++ b/include/linux/netfilter/xt_dscp.h @@ -0,0 +1,23 @@ +/* x_tables module for matching the IPv4/IPv6 DSCP field + * + * (C) 2002 Harald Welte <laforge@gnumonks.org> + * This software is distributed under GNU GPL v2, 1991 + * + * See RFC2474 for a description of the DSCP field within the IP Header. + * + * xt_dscp.h,v 1.3 2002/08/05 19:00:21 laforge Exp +*/ +#ifndef _XT_DSCP_H +#define _XT_DSCP_H + +#define XT_DSCP_MASK 0xfc /* 11111100 */ +#define XT_DSCP_SHIFT 2 +#define XT_DSCP_MAX 0x3f /* 00111111 */ + +/* match info */ +struct xt_dscp_info { + u_int8_t dscp; + u_int8_t invert; +}; + +#endif /* _XT_DSCP_H */ diff --git a/include/linux/netfilter_ipv4/ipt_dscp.h b/include/linux/netfilter_ipv4/ipt_dscp.h index 2fa6dfe92894..4b82ca912b0e 100644 --- a/include/linux/netfilter_ipv4/ipt_dscp.h +++ b/include/linux/netfilter_ipv4/ipt_dscp.h @@ -10,14 +10,12 @@ #ifndef _IPT_DSCP_H #define _IPT_DSCP_H -#define IPT_DSCP_MASK 0xfc /* 11111100 */ -#define IPT_DSCP_SHIFT 2 -#define IPT_DSCP_MAX 0x3f /* 00111111 */ +#include <linux/netfilter/xt_dscp.h> -/* match info */ -struct ipt_dscp_info { - u_int8_t dscp; - u_int8_t invert; -}; +#define IPT_DSCP_MASK XT_DSCP_MASK +#define IPT_DSCP_SHIFT XT_DSCP_SHIFT +#define IPT_DSCP_MAX XT_DSCP_MAX + +#define ipt_dscp_info xt_dscp_info #endif /* _IPT_DSCP_H */ diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index ef0b5aac5838..d88d71d1ce0d 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -278,17 +278,6 @@ config IP_NF_MATCH_ECN To compile it as a module, choose M here. If unsure, say N. -config IP_NF_MATCH_DSCP - tristate "DSCP match support" - depends on IP_NF_IPTABLES - help - This option adds a `DSCP' match, which allows you to match against - the IPv4 header DSCP field (DSCP codepoint). - - The DSCP codepoint can have any value between 0x0 and 0x4f. - - To compile it as a module, choose M here. If unsure, say N. - config IP_NF_MATCH_AH tristate "AH match support" depends on IP_NF_IPTABLES diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile index 3ded4a3af59c..b946b0f3ea9d 100644 --- a/net/ipv4/netfilter/Makefile +++ b/net/ipv4/netfilter/Makefile @@ -59,7 +59,6 @@ obj-$(CONFIG_IP_NF_MATCH_OWNER) += ipt_owner.o obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o -obj-$(CONFIG_IP_NF_MATCH_DSCP) += ipt_dscp.o obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o diff --git a/net/ipv4/netfilter/ipt_dscp.c b/net/ipv4/netfilter/ipt_dscp.c deleted file mode 100644 index 47177591aeb6..000000000000 --- a/net/ipv4/netfilter/ipt_dscp.c +++ /dev/null @@ -1,54 +0,0 @@ -/* IP tables module for matching the value of the IPv4 DSCP field - * - * ipt_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. - */ - -#include <linux/module.h> -#include <linux/skbuff.h> - -#include <linux/netfilter_ipv4/ipt_dscp.h> -#include <linux/netfilter_ipv4/ip_tables.h> - -MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); -MODULE_DESCRIPTION("iptables DSCP matching module"); -MODULE_LICENSE("GPL"); - -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) -{ - const struct ipt_dscp_info *info = matchinfo; - const struct iphdr *iph = skb->nh.iph; - - u_int8_t sh_dscp = ((info->dscp << IPT_DSCP_SHIFT) & IPT_DSCP_MASK); - - return ((iph->tos&IPT_DSCP_MASK) == sh_dscp) ^ info->invert; -} - -static struct ipt_match dscp_match = { - .name = "dscp", - .match = match, - .matchsize = sizeof(struct ipt_dscp_info), - .me = THIS_MODULE, -}; - -static int __init ipt_dscp_init(void) -{ - return ipt_register_match(&dscp_match); -} - -static void __exit ipt_dscp_fini(void) -{ - ipt_unregister_match(&dscp_match); - -} - -module_init(ipt_dscp_init); -module_exit(ipt_dscp_fini); diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index a9894ddfd72a..f781405f5d65 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -263,6 +263,17 @@ config NETFILTER_XT_MATCH_DCCP If you want to compile it as a module, say M here and read <file:Documentation/modules.txt>. If unsure, say `N'. +config NETFILTER_XT_MATCH_DSCP + tristate '"DSCP" match support' + depends on NETFILTER_XTABLES + help + This option adds a `DSCP' match, which allows you to match against + the IPv4/IPv6 header DSCP field (differentiated services codepoint). + + The DSCP field can have any value between 0x0 and 0x3f inclusive. + + To compile it as a module, choose M here. If unsure, say N. + config NETFILTER_XT_MATCH_ESP tristate '"ESP" match support' depends on NETFILTER_XTABLES diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 6fa4b7580458..0b8a70c1df46 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -37,6 +37,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_CONNBYTES) += xt_connbytes.o obj-$(CONFIG_NETFILTER_XT_MATCH_CONNMARK) += xt_connmark.o obj-$(CONFIG_NETFILTER_XT_MATCH_CONNTRACK) += xt_conntrack.o obj-$(CONFIG_NETFILTER_XT_MATCH_DCCP) += xt_dccp.o +obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o obj-$(CONFIG_NETFILTER_XT_MATCH_HELPER) += xt_helper.o obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o diff --git a/net/netfilter/xt_dscp.c b/net/netfilter/xt_dscp.c new file mode 100644 index 000000000000..82e250d1f007 --- /dev/null +++ b/net/netfilter/xt_dscp.c @@ -0,0 +1,113 @@ +/* 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. + */ + +#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> + +MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); +MODULE_DESCRIPTION("x_tables DSCP matching module"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_dscp"); +MODULE_ALIAS("ip6t_dscp"); + +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) +{ + const struct xt_dscp_info *info = matchinfo; + u_int8_t dscp = ipv4_get_dsfield(skb->nh.iph) >> 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) +{ + const struct xt_dscp_info *info = matchinfo; + u_int8_t dscp = ipv6_get_dsfield(skb->nh.ipv6h) >> 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) +{ + const u_int8_t dscp = ((struct xt_dscp_info *)matchinfo)->dscp; + + if (dscp > XT_DSCP_MAX) { + printk(KERN_ERR "xt_dscp: dscp %x out of range\n", dscp); + return 0; + } + + return 1; +} + +static struct xt_match dscp_match = { + .name = "dscp", + .match = match, + .checkentry = checkentry, + .matchsize = sizeof(struct xt_dscp_info), + .family = AF_INET, + .me = THIS_MODULE, +}; + +static struct xt_match dscp6_match = { + .name = "dscp", + .match = match6, + .checkentry = checkentry, + .matchsize = sizeof(struct xt_dscp_info), + .family = AF_INET6, + .me = THIS_MODULE, +}; + +static int __init xt_dscp_match_init(void) +{ + int ret; + ret = xt_register_match(&dscp_match); + if (ret) + return ret; + + ret = xt_register_match(&dscp6_match); + if (ret) + xt_unregister_match(&dscp_match); + + return ret; +} + +static void __exit xt_dscp_match_fini(void) +{ + xt_unregister_match(&dscp_match); + xt_unregister_match(&dscp6_match); +} + +module_init(xt_dscp_match_init); +module_exit(xt_dscp_match_fini); |
