From cfac5ef7b92a2d504563989ecd0beb563920444b Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Wed, 18 Feb 2009 18:39:31 +0100 Subject: [PATCH] netfilter: Combine ipt_ttl and ip6t_hl source Signed-off-by: Jan Engelhardt Signed-off-by: Patrick McHardy --- net/ipv4/netfilter/Kconfig | 9 --- net/ipv4/netfilter/Makefile | 1 - net/ipv4/netfilter/ipt_ttl.c | 63 -------------------- net/ipv6/netfilter/Kconfig | 9 --- net/ipv6/netfilter/Makefile | 1 - net/ipv6/netfilter/ip6t_hl.c | 68 ---------------------- net/netfilter/Kconfig | 8 +++ net/netfilter/Makefile | 1 + net/netfilter/xt_hl.c | 108 +++++++++++++++++++++++++++++++++++ 9 files changed, 117 insertions(+), 151 deletions(-) delete mode 100644 net/ipv4/netfilter/ipt_ttl.c delete mode 100644 net/ipv6/netfilter/ip6t_hl.c create mode 100644 net/netfilter/xt_hl.c diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index 3ad9f43b4c4..40ad41f19b7 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -92,15 +92,6 @@ config IP_NF_MATCH_ECN To compile it as a module, choose M here. If unsure, say N. -config IP_NF_MATCH_TTL - tristate '"ttl" match support' - depends on NETFILTER_ADVANCED - help - This adds CONFIG_IP_NF_MATCH_TTL option, which enabled the user - to match packets by their TTL value. - - To compile it as a module, choose M here. If unsure, say N. - # `filter', generic and specific targets config IP_NF_FILTER tristate "Packet filtering" diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile index 20b0c37155f..48111594ee9 100644 --- a/net/ipv4/netfilter/Makefile +++ b/net/ipv4/netfilter/Makefile @@ -51,7 +51,6 @@ obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o -obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o # targets obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o diff --git a/net/ipv4/netfilter/ipt_ttl.c b/net/ipv4/netfilter/ipt_ttl.c deleted file mode 100644 index 297f1cbf4ff..00000000000 --- a/net/ipv4/netfilter/ipt_ttl.c +++ /dev/null @@ -1,63 +0,0 @@ -/* IP tables module for matching the value of the TTL - * - * (C) 2000,2001 by Harald Welte - * - * 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 -#include -#include - -#include -#include - -MODULE_AUTHOR("Harald Welte "); -MODULE_DESCRIPTION("Xtables: IPv4 TTL field match"); -MODULE_LICENSE("GPL"); - -static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par) -{ - const struct ipt_ttl_info *info = par->matchinfo; - const u8 ttl = ip_hdr(skb)->ttl; - - switch (info->mode) { - case IPT_TTL_EQ: - return ttl == info->ttl; - case IPT_TTL_NE: - return ttl != info->ttl; - case IPT_TTL_LT: - return ttl < info->ttl; - case IPT_TTL_GT: - return ttl > info->ttl; - default: - printk(KERN_WARNING "ipt_ttl: unknown mode %d\n", - info->mode); - return false; - } - - return false; -} - -static struct xt_match ttl_mt_reg __read_mostly = { - .name = "ttl", - .family = NFPROTO_IPV4, - .match = ttl_mt, - .matchsize = sizeof(struct ipt_ttl_info), - .me = THIS_MODULE, -}; - -static int __init ttl_mt_init(void) -{ - return xt_register_match(&ttl_mt_reg); -} - -static void __exit ttl_mt_exit(void) -{ - xt_unregister_match(&ttl_mt_reg); -} - -module_init(ttl_mt_init); -module_exit(ttl_mt_exit); diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig index 6a42a968c49..4a8d7ecd6d0 100644 --- a/net/ipv6/netfilter/Kconfig +++ b/net/ipv6/netfilter/Kconfig @@ -94,15 +94,6 @@ config IP6_NF_MATCH_OPTS To compile it as a module, choose M here. If unsure, say N. -config IP6_NF_MATCH_HL - tristate '"hl" match support' - depends on NETFILTER_ADVANCED - help - HL matching allows you to match packets based on the hop - limit of the packet. - - To compile it as a module, choose M here. If unsure, say N. - config IP6_NF_MATCH_IPV6HEADER tristate '"ipv6header" IPv6 Extension Headers Match' default m if NETFILTER_ADVANCED=n diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile index 61a4570d0ed..aafbba30c89 100644 --- a/net/ipv6/netfilter/Makefile +++ b/net/ipv6/netfilter/Makefile @@ -20,7 +20,6 @@ obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o obj-$(CONFIG_IP6_NF_MATCH_EUI64) += ip6t_eui64.o obj-$(CONFIG_IP6_NF_MATCH_FRAG) += ip6t_frag.o -obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o obj-$(CONFIG_IP6_NF_MATCH_IPV6HEADER) += ip6t_ipv6header.o obj-$(CONFIG_IP6_NF_MATCH_MH) += ip6t_mh.o obj-$(CONFIG_IP6_NF_MATCH_OPTS) += ip6t_hbh.o diff --git a/net/ipv6/netfilter/ip6t_hl.c b/net/ipv6/netfilter/ip6t_hl.c deleted file mode 100644 index c964dca1132..00000000000 --- a/net/ipv6/netfilter/ip6t_hl.c +++ /dev/null @@ -1,68 +0,0 @@ -/* Hop Limit matching module */ - -/* (C) 2001-2002 Maciej Soltysiak - * Based on HW's ttl module - * - * 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 -#include -#include - -#include -#include - -MODULE_AUTHOR("Maciej Soltysiak "); -MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field match"); -MODULE_LICENSE("GPL"); - -static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par) -{ - const struct ip6t_hl_info *info = par->matchinfo; - const struct ipv6hdr *ip6h = ipv6_hdr(skb); - - switch (info->mode) { - case IP6T_HL_EQ: - return ip6h->hop_limit == info->hop_limit; - break; - case IP6T_HL_NE: - return ip6h->hop_limit != info->hop_limit; - break; - case IP6T_HL_LT: - return ip6h->hop_limit < info->hop_limit; - break; - case IP6T_HL_GT: - return ip6h->hop_limit > info->hop_limit; - break; - default: - printk(KERN_WARNING "ip6t_hl: unknown mode %d\n", - info->mode); - return false; - } - - return false; -} - -static struct xt_match hl_mt6_reg __read_mostly = { - .name = "hl", - .family = NFPROTO_IPV6, - .match = hl_mt6, - .matchsize = sizeof(struct ip6t_hl_info), - .me = THIS_MODULE, -}; - -static int __init hl_mt6_init(void) -{ - return xt_register_match(&hl_mt6_reg); -} - -static void __exit hl_mt6_exit(void) -{ - xt_unregister_match(&hl_mt6_reg); -} - -module_init(hl_mt6_init); -module_exit(hl_mt6_exit); diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index d99f29b7b98..0eb98b4fbf4 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -620,6 +620,14 @@ config NETFILTER_XT_MATCH_HELPER To compile it as a module, choose M here. If unsure, say Y. +config NETFILTER_XT_MATCH_HL + tristate '"hl" hoplimit/TTL match support' + depends on NETFILTER_ADVANCED + ---help--- + HL matching allows you to match packets based on the hoplimit + in the IPv6 header, or the time-to-live field in the IPv4 + header of the packet. + config NETFILTER_XT_MATCH_IPRANGE tristate '"iprange" address range match support' depends on NETFILTER_ADVANCED diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 6ebe0482265..da73ed25701 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -68,6 +68,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o obj-$(CONFIG_NETFILTER_XT_MATCH_HELPER) += xt_helper.o +obj-$(CONFIG_NETFILTER_XT_MATCH_HL) += xt_hl.o obj-$(CONFIG_NETFILTER_XT_MATCH_IPRANGE) += xt_iprange.o obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o diff --git a/net/netfilter/xt_hl.c b/net/netfilter/xt_hl.c new file mode 100644 index 00000000000..7726154c87b --- /dev/null +++ b/net/netfilter/xt_hl.c @@ -0,0 +1,108 @@ +/* + * IP tables module for matching the value of the TTL + * (C) 2000,2001 by Harald Welte + * + * Hop Limit matching module + * (C) 2001-2002 Maciej Soltysiak + * + * 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 +#include +#include +#include + +#include +#include +#include + +MODULE_AUTHOR("Maciej Soltysiak "); +MODULE_DESCRIPTION("Xtables: Hoplimit/TTL field match"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_ttl"); +MODULE_ALIAS("ip6t_hl"); + +static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par) +{ + const struct ipt_ttl_info *info = par->matchinfo; + const u8 ttl = ip_hdr(skb)->ttl; + + switch (info->mode) { + case IPT_TTL_EQ: + return ttl == info->ttl; + case IPT_TTL_NE: + return ttl != info->ttl; + case IPT_TTL_LT: + return ttl < info->ttl; + case IPT_TTL_GT: + return ttl > info->ttl; + default: + printk(KERN_WARNING "ipt_ttl: unknown mode %d\n", + info->mode); + return false; + } + + return false; +} + +static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par) +{ + const struct ip6t_hl_info *info = par->matchinfo; + const struct ipv6hdr *ip6h = ipv6_hdr(skb); + + switch (info->mode) { + case IP6T_HL_EQ: + return ip6h->hop_limit == info->hop_limit; + break; + case IP6T_HL_NE: + return ip6h->hop_limit != info->hop_limit; + break; + case IP6T_HL_LT: + return ip6h->hop_limit < info->hop_limit; + break; + case IP6T_HL_GT: + return ip6h->hop_limit > info->hop_limit; + break; + default: + printk(KERN_WARNING "ip6t_hl: unknown mode %d\n", + info->mode); + return false; + } + + return false; +} + +static struct xt_match hl_mt_reg[] __read_mostly = { + { + .name = "ttl", + .revision = 0, + .family = NFPROTO_IPV4, + .match = ttl_mt, + .matchsize = sizeof(struct ipt_ttl_info), + .me = THIS_MODULE, + }, + { + .name = "hl", + .revision = 0, + .family = NFPROTO_IPV6, + .match = hl_mt6, + .matchsize = sizeof(struct ip6t_hl_info), + .me = THIS_MODULE, + }, +}; + +static int __init hl_mt_init(void) +{ + return xt_register_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg)); +} + +static void __exit hl_mt_exit(void) +{ + xt_unregister_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg)); +} + +module_init(hl_mt_init); +module_exit(hl_mt_exit); -- 2.41.0