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author | Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> | 2006-04-01 10:22:54 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2006-04-01 10:22:54 (GMT) |
commit | a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 (patch) | |
tree | c84c5b3167c116f0c419a2bbb04877bdac38dd07 /net/ipv6 | |
parent | dc5ab2faece3b7473931357db7f63f596678481d (diff) | |
download | linux-a89ecb6a2ef732d04058d87801e2b6bd7e5c7089.tar.xz |
[NETFILTER]: x_tables: unify IPv4/IPv6 multiport match
This unifies ipt_multiport and ip6t_multiport to xt_multiport.
As a result, this addes support for inversion and port range match
to IPv6 packets.
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r-- | net/ipv6/netfilter/Kconfig | 10 | ||||
-rw-r--r-- | net/ipv6/netfilter/Makefile | 1 | ||||
-rw-r--r-- | net/ipv6/netfilter/ip6t_multiport.c | 125 |
3 files changed, 0 insertions, 136 deletions
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig index bdd569f..4bc4e5b 100644 --- a/net/ipv6/netfilter/Kconfig +++ b/net/ipv6/netfilter/Kconfig @@ -87,16 +87,6 @@ config IP6_NF_MATCH_HL To compile it as a module, choose M here. If unsure, say N. -config IP6_NF_MATCH_MULTIPORT - tristate "Multiple port match support" - depends on IP6_NF_IPTABLES - help - Multiport matching allows you to match TCP or UDP packets based on - a series of source or destination ports: normally a rule can only - match a single range of ports. - - To compile it as a module, choose M here. If unsure, say N. - config IP6_NF_MATCH_OWNER tristate "Owner match support" depends on IP6_NF_IPTABLES diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile index c387170..eeeb57d 100644 --- a/net/ipv6/netfilter/Makefile +++ b/net/ipv6/netfilter/Makefile @@ -10,7 +10,6 @@ obj-$(CONFIG_IP6_NF_MATCH_IPV6HEADER) += ip6t_ipv6header.o obj-$(CONFIG_IP6_NF_MATCH_FRAG) += ip6t_frag.o obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o obj-$(CONFIG_IP6_NF_MATCH_EUI64) += ip6t_eui64.o -obj-$(CONFIG_IP6_NF_MATCH_MULTIPORT) += ip6t_multiport.o obj-$(CONFIG_IP6_NF_MATCH_OWNER) += ip6t_owner.o obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o diff --git a/net/ipv6/netfilter/ip6t_multiport.c b/net/ipv6/netfilter/ip6t_multiport.c deleted file mode 100644 index 10c48ba..0000000 --- a/net/ipv6/netfilter/ip6t_multiport.c +++ /dev/null @@ -1,125 +0,0 @@ -/* Kernel module to match one of a list of TCP/UDP ports: ports are in - the same place so we can treat them as equal. */ - -/* (C) 1999-2001 Paul `Rusty' Russell - * (C) 2002-2004 Netfilter Core Team <coreteam@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/types.h> -#include <linux/udp.h> -#include <linux/skbuff.h> -#include <linux/in.h> - -#include <linux/netfilter_ipv6/ip6t_multiport.h> -#include <linux/netfilter_ipv6/ip6_tables.h> - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); -MODULE_DESCRIPTION("ip6tables match for multiple ports"); - -#if 0 -#define duprintf(format, args...) printk(format , ## args) -#else -#define duprintf(format, args...) -#endif - -/* Returns 1 if the port is matched by the test, 0 otherwise. */ -static inline int -ports_match(const u_int16_t *portlist, enum ip6t_multiport_flags flags, - u_int8_t count, u_int16_t src, u_int16_t dst) -{ - unsigned int i; - for (i=0; i<count; i++) { - if (flags != IP6T_MULTIPORT_DESTINATION - && portlist[i] == src) - return 1; - - if (flags != IP6T_MULTIPORT_SOURCE - && portlist[i] == dst) - return 1; - } - - return 0; -} - -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) -{ - u16 _ports[2], *pptr; - const struct ip6t_multiport *multiinfo = matchinfo; - - /* Must not be a fragment. */ - if (offset) - return 0; - - /* Must be big enough to read ports (both UDP and TCP have - them at the start). */ - pptr = skb_header_pointer(skb, protoff, sizeof(_ports), &_ports[0]); - if (pptr == NULL) { - /* We've been asked to examine this packet, and we - * can't. Hence, no choice but to drop. - */ - duprintf("ip6t_multiport:" - " Dropping evil offset=0 tinygram.\n"); - *hotdrop = 1; - return 0; - } - - return ports_match(multiinfo->ports, - multiinfo->flags, multiinfo->count, - ntohs(pptr[0]), ntohs(pptr[1])); -} - -/* Called when user tries to insert an entry of this type. */ -static int -checkentry(const char *tablename, - const void *info, - const struct xt_match *match, - void *matchinfo, - unsigned int matchsize, - unsigned int hook_mask) -{ - const struct ip6t_ip6 *ip = info; - const struct ip6t_multiport *multiinfo = matchinfo; - - /* Must specify proto == TCP/UDP, no unknown flags or bad count */ - return (ip->proto == IPPROTO_TCP || ip->proto == IPPROTO_UDP) - && !(ip->invflags & IP6T_INV_PROTO) - && (multiinfo->flags == IP6T_MULTIPORT_SOURCE - || multiinfo->flags == IP6T_MULTIPORT_DESTINATION - || multiinfo->flags == IP6T_MULTIPORT_EITHER) - && multiinfo->count <= IP6T_MULTI_PORTS; -} - -static struct ip6t_match multiport_match = { - .name = "multiport", - .match = match, - .matchsize = sizeof(struct ip6t_multiport), - .checkentry = checkentry, - .me = THIS_MODULE, -}; - -static int __init ip6t_multiport_init(void) -{ - return ip6t_register_match(&multiport_match); -} - -static void __exit ip6t_multiport_fini(void) -{ - ip6t_unregister_match(&multiport_match); -} - -module_init(ip6t_multiport_init); -module_exit(ip6t_multiport_fini); |