--- linux-2.6.8.1/net/ipv6/netfilter/Makefile.old 2004-09-11 12:31:12.000000000 +0200 +++ linux-2.6.8.1/net/ipv6/netfilter/Makefile 2004-09-11 12:34:30.000000000 +0200 @@ -16,6 +16,7 @@ obj-$(CONFIG_IP6_NF_MATCH_AHESP) += ip6t obj-$(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-$(CONFIG_IP6_NF_MATCH_PHYSDEV) += ip6t_physdev.o obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o obj-$(CONFIG_IP6_NF_TARGET_MARK) += ip6t_MARK.o --- linux-2.6.8.1/net/ipv6/netfilter/Kconfig.old 2004-09-11 12:24:02.000000000 +0200 +++ linux-2.6.8.1/net/ipv6/netfilter/Kconfig 2004-09-11 12:36:30.000000000 +0200 @@ -158,6 +158,15 @@ config IP6_NF_MATCH_EUI64 To compile it as a module, choose M here. If unsure, say N. +config IP6_NF_MATCH_PHYSDEV + tristate "Physdev match support" + depends on IP6_NF_IPTABLES && BRIDGE_NETFILTER + help + Physdev packet matching matches against the physical bridge ports + the IP packet arrived on or will leave by. + + To compile it as a module, choose M here. If unsure, say N. + # dep_tristate ' Multiple port match support' CONFIG_IP6_NF_MATCH_MULTIPORT $CONFIG_IP6_NF_IPTABLES # dep_tristate ' TOS match support' CONFIG_IP6_NF_MATCH_TOS $CONFIG_IP6_NF_IPTABLES # if [ "$CONFIG_IP6_NF_CONNTRACK" != "n" ]; then --- /dev/null 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.8.1/net/ipv6/netfilter/ip6t_physdev.c 2004-09-11 12:40:41.000000000 +0200 @@ -0,0 +1,136 @@ +/* Kernel module to match the bridge port in and + * out device for IP packets coming into contact with a bridge. */ + +/* (C) 2001-2003 Bart De Schuymer + * + * 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 +#define MATCH 1 +#define NOMATCH 0 + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Bart De Schuymer "); +MODULE_DESCRIPTION("iptables bridge physical device match module"); + +static int +match(const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const void *matchinfo, + int offset, + const void *hdr, + u_int16_t datalen, + int *hotdrop) +{ + int i; + static const char nulldevname[IFNAMSIZ]; + const struct ip6t_physdev_info *info = matchinfo; + unsigned int ret; + const char *indev, *outdev; + struct nf_bridge_info *nf_bridge; + + /* Not a bridged IP packet or no info available yet: + * LOCAL_OUT/mangle and LOCAL_OUT/nat don't know if + * the destination device will be a bridge. */ + if (!(nf_bridge = skb->nf_bridge)) { + /* Return MATCH if the invert flags of the used options are on */ + if ((info->bitmask & IP6T_PHYSDEV_OP_BRIDGED) && + !(info->invert & IP6T_PHYSDEV_OP_BRIDGED)) + return NOMATCH; + if ((info->bitmask & IP6T_PHYSDEV_OP_ISIN) && + !(info->invert & IP6T_PHYSDEV_OP_ISIN)) + return NOMATCH; + if ((info->bitmask & IP6T_PHYSDEV_OP_ISOUT) && + !(info->invert & IP6T_PHYSDEV_OP_ISOUT)) + return NOMATCH; + if ((info->bitmask & IP6T_PHYSDEV_OP_IN) && + !(info->invert & IP6T_PHYSDEV_OP_IN)) + return NOMATCH; + if ((info->bitmask & IP6T_PHYSDEV_OP_OUT) && + !(info->invert & IP6T_PHYSDEV_OP_OUT)) + return NOMATCH; + return MATCH; + } + + /* This only makes sense in the FORWARD and POSTROUTING chains */ + if ((info->bitmask & IP6T_PHYSDEV_OP_BRIDGED) && + (!!(nf_bridge->mask & BRNF_BRIDGED) ^ + !(info->invert & IP6T_PHYSDEV_OP_BRIDGED))) + return NOMATCH; + + if ((info->bitmask & IP6T_PHYSDEV_OP_ISIN && + (!nf_bridge->physindev ^ !!(info->invert & IP6T_PHYSDEV_OP_ISIN))) || + (info->bitmask & IP6T_PHYSDEV_OP_ISOUT && + (!nf_bridge->physoutdev ^ !!(info->invert & IP6T_PHYSDEV_OP_ISOUT)))) + return NOMATCH; + + if (!(info->bitmask & IP6T_PHYSDEV_OP_IN)) + goto match_outdev; + indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname; + for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned int); i++) { + ret |= (((const unsigned int *)indev)[i] + ^ ((const unsigned int *)info->physindev)[i]) + & ((const unsigned int *)info->in_mask)[i]; + } + + if ((ret == 0) ^ !(info->invert & IP6T_PHYSDEV_OP_IN)) + return NOMATCH; + +match_outdev: + if (!(info->bitmask & IP6T_PHYSDEV_OP_OUT)) + return MATCH; + outdev = nf_bridge->physoutdev ? + nf_bridge->physoutdev->name : nulldevname; + for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned int); i++) { + ret |= (((const unsigned int *)outdev)[i] + ^ ((const unsigned int *)info->physoutdev)[i]) + & ((const unsigned int *)info->out_mask)[i]; + } + + return (ret != 0) ^ !(info->invert & IP6T_PHYSDEV_OP_OUT); +} + +static int +checkentry(const char *tablename, + const struct ip6t_ip6 *ip, + void *matchinfo, + unsigned int matchsize, + unsigned int hook_mask) +{ + const struct ip6t_physdev_info *info = matchinfo; + + if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_physdev_info))) + return 0; + if (!(info->bitmask & IP6T_PHYSDEV_OP_MASK) || + info->bitmask & ~IP6T_PHYSDEV_OP_MASK) + return 0; + return 1; +} + +static struct ip6t_match physdev_match = { + .name = "physdev", + .match = &match, + .checkentry = &checkentry, + .me = THIS_MODULE, +}; + +static int __init init(void) +{ + return ip6t_register_match(&physdev_match); +} + +static void __exit fini(void) +{ + ip6t_unregister_match(&physdev_match); +} + +module_init(init); +module_exit(fini); --- /dev/null 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.8.1/include/linux/netfilter_ipv6/ip6t_physdev.h 2004-09-11 12:31:01.000000000 +0200 @@ -0,0 +1,24 @@ +#ifndef _IP6T_PHYSDEV_H +#define _IP6T_PHYSDEV_H + +#ifdef __KERNEL__ +#include +#endif + +#define IP6T_PHYSDEV_OP_IN 0x01 +#define IP6T_PHYSDEV_OP_OUT 0x02 +#define IP6T_PHYSDEV_OP_BRIDGED 0x04 +#define IP6T_PHYSDEV_OP_ISIN 0x08 +#define IP6T_PHYSDEV_OP_ISOUT 0x10 +#define IP6T_PHYSDEV_OP_MASK (0x20 - 1) + +struct ip6t_physdev_info { + char physindev[IFNAMSIZ]; + char in_mask[IFNAMSIZ]; + char physoutdev[IFNAMSIZ]; + char out_mask[IFNAMSIZ]; + u_int8_t invert; + u_int8_t bitmask; +}; + +#endif /*_IP6T_PHYSDEV_H*/