forked from luck/tmp_suning_uos_patched
netfilter: xtables: add device group match
Add a new 'devgroup' match to match on the device group of the incoming and outgoing network device of a packet. Signed-off-by: Patrick McHardy <kaber@trash.net>
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@ -37,6 +37,7 @@ header-y += xt_connmark.h
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header-y += xt_conntrack.h
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header-y += xt_conntrack.h
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header-y += xt_cpu.h
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header-y += xt_cpu.h
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header-y += xt_dccp.h
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header-y += xt_dccp.h
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header-y += xt_devgroup.h
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header-y += xt_dscp.h
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header-y += xt_dscp.h
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header-y += xt_esp.h
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header-y += xt_esp.h
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header-y += xt_hashlimit.h
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header-y += xt_hashlimit.h
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21
include/linux/netfilter/xt_devgroup.h
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21
include/linux/netfilter/xt_devgroup.h
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@ -0,0 +1,21 @@
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#ifndef _XT_DEVGROUP_H
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#define _XT_DEVGROUP_H
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#include <linux/types.h>
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enum xt_devgroup_flags {
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XT_DEVGROUP_MATCH_SRC = 0x1,
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XT_DEVGROUP_INVERT_SRC = 0x2,
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XT_DEVGROUP_MATCH_DST = 0x4,
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XT_DEVGROUP_INVERT_DST = 0x8,
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};
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struct xt_devgroup_info {
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__u32 flags;
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__u32 src_group;
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__u32 src_mask;
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__u32 dst_group;
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__u32 dst_mask;
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};
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#endif /* _XT_DEVGROUP_H */
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@ -738,6 +738,15 @@ config NETFILTER_XT_MATCH_DCCP
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If you want to compile it as a module, say M here and read
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If you want to compile it as a module, say M here and read
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<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
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<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
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config NETFILTER_XT_MATCH_DEVGROUP
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tristate '"devgroup" match support'
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depends on NETFILTER_ADVANCED
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help
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This options adds a `devgroup' match, which allows to match on the
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device group a network device is assigned to.
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To compile it as a module, choose M here. If unsure, say N.
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config NETFILTER_XT_MATCH_DSCP
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config NETFILTER_XT_MATCH_DSCP
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tristate '"dscp" and "tos" match support'
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tristate '"dscp" and "tos" match support'
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depends on NETFILTER_ADVANCED
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depends on NETFILTER_ADVANCED
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@ -77,6 +77,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLIMIT) += xt_connlimit.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_CONNTRACK) += xt_conntrack.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_CONNTRACK) += xt_conntrack.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_CPU) += xt_cpu.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_CPU) += xt_cpu.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_DCCP) += xt_dccp.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_DCCP) += xt_dccp.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_DEVGROUP) += xt_devgroup.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
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obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
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82
net/netfilter/xt_devgroup.c
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82
net/netfilter/xt_devgroup.c
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@ -0,0 +1,82 @@
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/*
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* Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/netfilter/xt_devgroup.h>
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#include <linux/netfilter/x_tables.h>
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MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Xtables: Device group match");
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MODULE_ALIAS("ipt_devgroup");
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MODULE_ALIAS("ip6t_devgroup");
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static bool devgroup_mt(const struct sk_buff *skb, struct xt_action_param *par)
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{
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const struct xt_devgroup_info *info = par->matchinfo;
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if (info->flags & XT_DEVGROUP_MATCH_SRC &&
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(((info->src_group ^ par->in->group) & info->src_mask ? 1 : 0) ^
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((info->flags & XT_DEVGROUP_INVERT_SRC) ? 1 : 0)))
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return false;
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if (info->flags & XT_DEVGROUP_MATCH_DST &&
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(((info->dst_group ^ par->out->group) & info->dst_mask ? 1 : 0) ^
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((info->flags & XT_DEVGROUP_INVERT_DST) ? 1 : 0)))
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return false;
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return true;
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}
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static int devgroup_mt_checkentry(const struct xt_mtchk_param *par)
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{
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const struct xt_devgroup_info *info = par->matchinfo;
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if (info->flags & ~(XT_DEVGROUP_MATCH_SRC | XT_DEVGROUP_INVERT_SRC |
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XT_DEVGROUP_MATCH_DST | XT_DEVGROUP_INVERT_DST))
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return -EINVAL;
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if (info->flags & XT_DEVGROUP_MATCH_SRC &&
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par->hook_mask & ~((1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_LOCAL_IN) |
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(1 << NF_INET_FORWARD)))
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return -EINVAL;
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if (info->flags & XT_DEVGROUP_MATCH_DST &&
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par->hook_mask & ~((1 << NF_INET_FORWARD) |
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(1 << NF_INET_LOCAL_OUT) |
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(1 << NF_INET_POST_ROUTING)))
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return -EINVAL;
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return 0;
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}
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static struct xt_match devgroup_mt_reg __read_mostly = {
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.name = "devgroup",
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.match = devgroup_mt,
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.checkentry = devgroup_mt_checkentry,
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.matchsize = sizeof(struct xt_devgroup_info),
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.family = NFPROTO_UNSPEC,
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.me = THIS_MODULE
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};
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static int __init devgroup_mt_init(void)
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{
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return xt_register_match(&devgroup_mt_reg);
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}
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static void __exit devgroup_mt_exit(void)
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{
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xt_unregister_match(&devgroup_mt_reg);
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}
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module_init(devgroup_mt_init);
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module_exit(devgroup_mt_exit);
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