mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-20 18:39:12 +00:00
2e4e6a17af
This monster-patch tries to do the best job for unifying the data structures and backend interfaces for the three evil clones ip_tables, ip6_tables and arp_tables. In an ideal world we would never have allowed this kind of copy+paste programming... but well, our world isn't (yet?) ideal. o introduce a new x_tables module o {ip,arp,ip6}_tables depend on this x_tables module o registration functions for tables, matches and targets are only wrappers around x_tables provided functions o all matches/targets that are used from ip_tables and ip6_tables are now implemented as xt_FOOBAR.c files and provide module aliases to ipt_FOOBAR and ip6t_FOOBAR o header files for xt_matches are in include/linux/netfilter/, include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers around the xt_FOOBAR.h headers Based on this patchset we're going to further unify the code, gradually getting rid of all the layer 3 specific assumptions. Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
109 lines
2.6 KiB
C
109 lines
2.6 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/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("iptables qdisc classification target module");
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MODULE_ALIAS("ipt_CLASSIFY");
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static unsigned int
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target(struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int hooknum,
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const void *targinfo,
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void *userinfo)
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{
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const struct xt_classify_target_info *clinfo = targinfo;
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if ((*pskb)->priority != clinfo->priority)
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(*pskb)->priority = clinfo->priority;
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return XT_CONTINUE;
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}
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static int
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checkentry(const char *tablename,
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const void *e,
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void *targinfo,
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unsigned int targinfosize,
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unsigned int hook_mask)
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{
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if (targinfosize != XT_ALIGN(sizeof(struct xt_classify_target_info))){
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printk(KERN_ERR "CLASSIFY: invalid size (%u != %Zu).\n",
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targinfosize,
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XT_ALIGN(sizeof(struct xt_classify_target_info)));
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return 0;
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}
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if (hook_mask & ~((1 << NF_IP_LOCAL_OUT) | (1 << NF_IP_FORWARD) |
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(1 << NF_IP_POST_ROUTING))) {
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printk(KERN_ERR "CLASSIFY: only valid in LOCAL_OUT, FORWARD "
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"and POST_ROUTING.\n");
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return 0;
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}
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if (strcmp(tablename, "mangle") != 0) {
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printk(KERN_ERR "CLASSIFY: can only be called from "
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"\"mangle\" table, not \"%s\".\n",
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tablename);
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return 0;
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}
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return 1;
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}
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static struct xt_target classify_reg = {
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.name = "CLASSIFY",
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.target = target,
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.checkentry = checkentry,
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.me = THIS_MODULE,
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};
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static struct xt_target classify6_reg = {
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.name = "CLASSIFY",
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.target = target,
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.checkentry = checkentry,
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.me = THIS_MODULE,
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};
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static int __init init(void)
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{
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int ret;
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ret = xt_register_target(AF_INET, &classify_reg);
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if (ret)
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return ret;
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ret = xt_register_target(AF_INET6, &classify6_reg);
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if (ret)
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xt_unregister_target(AF_INET, &classify_reg);
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return ret;
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}
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static void __exit fini(void)
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{
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xt_unregister_target(AF_INET, &classify_reg);
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xt_unregister_target(AF_INET6, &classify6_reg);
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}
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module_init(init);
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module_exit(fini);
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