![Jan Engelhardt](/assets/img/avatar_default.png)
When a match or target is looked up using xt_find_{match,target}, Xtables will also search the NFPROTO_UNSPEC module list. This allows for protocol-independent extensions (like xt_time) to be reused from other components (e.g. arptables, ebtables). Extensions that take different codepaths depending on match->family or target->family of course cannot use NFPROTO_UNSPEC within the registration structure (e.g. xt_pkttype). Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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* This is a module which is used for setting the skb->priority field
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* of an skb for qdisc classification.
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*/
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/* (C) 2001-2002 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/ip.h>
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#include <net/checksum.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter_ipv6.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter/xt_CLASSIFY.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: Qdisc classification");
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MODULE_ALIAS("ipt_CLASSIFY");
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MODULE_ALIAS("ip6t_CLASSIFY");
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static unsigned int
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classify_tg(struct sk_buff *skb, const struct net_device *in,
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const struct net_device *out, unsigned int hooknum,
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const struct xt_target *target, const void *targinfo)
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{
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const struct xt_classify_target_info *clinfo = targinfo;
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skb->priority = clinfo->priority;
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return XT_CONTINUE;
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}
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static struct xt_target classify_tg_reg __read_mostly = {
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.name = "CLASSIFY",
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.revision = 0,
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.family = NFPROTO_UNSPEC,
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.table = "mangle",
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.hooks = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
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(1 << NF_INET_POST_ROUTING),
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.target = classify_tg,
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.targetsize = sizeof(struct xt_classify_target_info),
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.me = THIS_MODULE,
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};
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static int __init classify_tg_init(void)
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{
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return xt_register_target(&classify_tg_reg);
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}
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static void __exit classify_tg_exit(void)
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{
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xt_unregister_target(&classify_tg_reg);
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}
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module_init(classify_tg_init);
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module_exit(classify_tg_exit);
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