netfilter: Combine ipt_ttl and ip6t_hl source
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 3ad9f43..40ad41f 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -92,15 +92,6 @@
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 20b0c37..4811159 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -51,7 +51,6 @@
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 297f1cb..0000000
--- 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 <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/ip.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-
-#include <linux/netfilter_ipv4/ipt_ttl.h>
-#include <linux/netfilter/x_tables.h>
-
-MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-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 6a42a96..4a8d7ec 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -94,15 +94,6 @@
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 61a4570..aafbba3 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -20,7 +20,6 @@
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 c964dca..0000000
--- a/net/ipv6/netfilter/ip6t_hl.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/* Hop Limit matching module */
-
-/* (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
- * 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 <linux/ipv6.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-
-#include <linux/netfilter_ipv6/ip6t_hl.h>
-#include <linux/netfilter/x_tables.h>
-
-MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-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 d99f29b..0eb98b4 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -620,6 +620,14 @@
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 6ebe048..da73ed2 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -68,6 +68,7 @@
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 0000000..7726154
--- /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 <laforge@netfilter.org>
+ *
+ * Hop Limit matching module
+ * (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * 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/ip.h>
+#include <linux/ipv6.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_ttl.h>
+#include <linux/netfilter_ipv6/ip6t_hl.h>
+
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+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);