~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/ipv6/netfilter/ip6table_filter.c

Version: ~ [ linux-5.15-rc7 ] ~ [ linux-5.14.14 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.75 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.155 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.213 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.252 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.287 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.289 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * This is the 1999 rewrite of IP Firewalling, aiming for kernel 2.3.x.
  3  *
  4  * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
  5  * Copyright (C) 2000-2004 Netfilter Core Team <coreteam@netfilter.org>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License version 2 as
  9  * published by the Free Software Foundation.
 10  */
 11 
 12 #include <linux/module.h>
 13 #include <linux/moduleparam.h>
 14 #include <linux/netfilter_ipv6/ip6_tables.h>
 15 #include <linux/slab.h>
 16 
 17 MODULE_LICENSE("GPL");
 18 MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
 19 MODULE_DESCRIPTION("ip6tables filter table");
 20 
 21 #define FILTER_VALID_HOOKS ((1 << NF_INET_LOCAL_IN) | \
 22                             (1 << NF_INET_FORWARD) | \
 23                             (1 << NF_INET_LOCAL_OUT))
 24 
 25 static const struct xt_table packet_filter = {
 26         .name           = "filter",
 27         .valid_hooks    = FILTER_VALID_HOOKS,
 28         .me             = THIS_MODULE,
 29         .af             = NFPROTO_IPV6,
 30         .priority       = NF_IP6_PRI_FILTER,
 31 };
 32 
 33 /* The work comes in here from netfilter.c. */
 34 static unsigned int
 35 ip6table_filter_hook(unsigned int hook, struct sk_buff *skb,
 36                      const struct net_device *in, const struct net_device *out,
 37                      int (*okfn)(struct sk_buff *))
 38 {
 39         const struct net *net = dev_net((in != NULL) ? in : out);
 40 
 41         return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_filter);
 42 }
 43 
 44 static struct nf_hook_ops *filter_ops __read_mostly;
 45 
 46 /* Default to forward because I got too much mail already. */
 47 static bool forward = true;
 48 module_param(forward, bool, 0000);
 49 
 50 static int __net_init ip6table_filter_net_init(struct net *net)
 51 {
 52         struct ip6t_replace *repl;
 53 
 54         repl = ip6t_alloc_initial_table(&packet_filter);
 55         if (repl == NULL)
 56                 return -ENOMEM;
 57         /* Entry 1 is the FORWARD hook */
 58         ((struct ip6t_standard *)repl->entries)[1].target.verdict =
 59                 forward ? -NF_ACCEPT - 1 : -NF_DROP - 1;
 60 
 61         net->ipv6.ip6table_filter =
 62                 ip6t_register_table(net, &packet_filter, repl);
 63         kfree(repl);
 64         return PTR_ERR_OR_ZERO(net->ipv6.ip6table_filter);
 65 }
 66 
 67 static void __net_exit ip6table_filter_net_exit(struct net *net)
 68 {
 69         ip6t_unregister_table(net, net->ipv6.ip6table_filter);
 70 }
 71 
 72 static struct pernet_operations ip6table_filter_net_ops = {
 73         .init = ip6table_filter_net_init,
 74         .exit = ip6table_filter_net_exit,
 75 };
 76 
 77 static int __init ip6table_filter_init(void)
 78 {
 79         int ret;
 80 
 81         ret = register_pernet_subsys(&ip6table_filter_net_ops);
 82         if (ret < 0)
 83                 return ret;
 84 
 85         /* Register hooks */
 86         filter_ops = xt_hook_link(&packet_filter, ip6table_filter_hook);
 87         if (IS_ERR(filter_ops)) {
 88                 ret = PTR_ERR(filter_ops);
 89                 goto cleanup_table;
 90         }
 91 
 92         return ret;
 93 
 94  cleanup_table:
 95         unregister_pernet_subsys(&ip6table_filter_net_ops);
 96         return ret;
 97 }
 98 
 99 static void __exit ip6table_filter_fini(void)
100 {
101         xt_hook_unlink(&packet_filter, filter_ops);
102         unregister_pernet_subsys(&ip6table_filter_net_ops);
103 }
104 
105 module_init(ip6table_filter_init);
106 module_exit(ip6table_filter_fini);
107 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp