Merge git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb

[linux-2.6-omap-h63xx.git] / net / ipv4 / netfilter / iptable_raw.c

diff --git a/net/ipv4/netfilter/iptable_raw.c b/net/ipv4/netfilter/iptable_raw.c
index 7912cce1e1b8d2a0b1af3689354b8f590cd43fcd..e41fe8ca4e1c87b9538961411504e1e7777c27b3 100644 (file)
--- a/net/ipv4/netfilter/iptable_raw.c
+++ b/net/ipv4/netfilter/iptable_raw.c
@@ -1,88 +1,45 @@
-/* 
+/*
  * 'raw' table, which is the very first hooked in at PRE_ROUTING and LOCAL_OUT .
  *
  * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
  */
 #include <linux/module.h>
 #include <linux/netfilter_ipv4/ip_tables.h>
+#include <net/ip.h>
 
-#define RAW_VALID_HOOKS ((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT))
+#define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
 
 static struct
 {
        struct ipt_replace repl;
        struct ipt_standard entries[2];
        struct ipt_error term;
-} initial_table __initdata = {
+} initial_table __net_initdata = {
        .repl = {
-               .name = "raw", 
-               .valid_hooks = RAW_VALID_HOOKS, 
+               .name = "raw",
+               .valid_hooks = RAW_VALID_HOOKS,
                .num_entries = 3,
                .size = sizeof(struct ipt_standard) * 2 + sizeof(struct ipt_error),
-               .hook_entry = { 
-                       [NF_IP_PRE_ROUTING] = 0,
-                       [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) },
-               .underflow = { 
-                       [NF_IP_PRE_ROUTING] = 0,
-                       [NF_IP_LOCAL_OUT]  = sizeof(struct ipt_standard) },
+               .hook_entry = {
+                       [NF_INET_PRE_ROUTING] = 0,
+                       [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard)
+               },
+               .underflow = {
+                       [NF_INET_PRE_ROUTING] = 0,
+                       [NF_INET_LOCAL_OUT]  = sizeof(struct ipt_standard)
+               },
        },
        .entries = {
-            /* PRE_ROUTING */
-            { 
-                    .entry = { 
-                            .target_offset = sizeof(struct ipt_entry),
-                            .next_offset = sizeof(struct ipt_standard),
-                    },
-                    .target = { 
-                         .target = { 
-                                 .u = {
-                                         .target_size = IPT_ALIGN(sizeof(struct ipt_standard_target)),
-                                 },
-                         },
-                         .verdict = -NF_ACCEPT - 1,
-                    },
-            },
-
-            /* LOCAL_OUT */
-            {
-                    .entry = {
-                            .target_offset = sizeof(struct ipt_entry),
-                            .next_offset = sizeof(struct ipt_standard),
-                    },
-                    .target = {
-                            .target = {
-                                    .u = {
-                                            .target_size = IPT_ALIGN(sizeof(struct ipt_standard_target)),
-                                    },
-                            },
-                            .verdict = -NF_ACCEPT - 1,
-                    },
-            },
+               IPT_STANDARD_INIT(NF_ACCEPT),   /* PRE_ROUTING */
+               IPT_STANDARD_INIT(NF_ACCEPT),   /* LOCAL_OUT */
        },
-       /* ERROR */
-       .term = {
-               .entry = {
-                       .target_offset = sizeof(struct ipt_entry),
-                       .next_offset = sizeof(struct ipt_error),
-               },
-               .target = {
-                       .target = {
-                               .u = {
-                                       .user = {
-                                               .target_size = IPT_ALIGN(sizeof(struct ipt_error_target)), 
-                                               .name = IPT_ERROR_TARGET,
-                                       },
-                               },
-                       },
-                       .errorname = "ERROR",
-               },
-       }
+       .term = IPT_ERROR_INIT,                 /* ERROR */
 };
 
-static struct ipt_table packet_raw = { 
-       .name = "raw", 
-       .valid_hooks =  RAW_VALID_HOOKS, 
-       .lock = RW_LOCK_UNLOCKED, 
+static struct xt_table packet_raw = {
+       .name = "raw",
+       .valid_hooks =  RAW_VALID_HOOKS,
+       .lock = RW_LOCK_UNLOCKED,
        .me = THIS_MODULE,
        .af = AF_INET,
 };
@@ -90,38 +47,75 @@ static struct ipt_table packet_raw = {
 /* The work comes in here from netfilter.c. */
 static unsigned int
 ipt_hook(unsigned int hook,
-        struct sk_buff **pskb,
+        struct sk_buff *skb,
         const struct net_device *in,
         const struct net_device *out,
         int (*okfn)(struct sk_buff *))
 {
-       return ipt_do_table(pskb, hook, in, out, &packet_raw, NULL);
+       return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_raw);
+}
+
+static unsigned int
+ipt_local_hook(unsigned int hook,
+              struct sk_buff *skb,
+              const struct net_device *in,
+              const struct net_device *out,
+              int (*okfn)(struct sk_buff *))
+{
+       /* root is playing with raw sockets. */
+       if (skb->len < sizeof(struct iphdr) ||
+           ip_hdrlen(skb) < sizeof(struct iphdr)) {
+               if (net_ratelimit())
+                       printk("iptable_raw: ignoring short SOCK_RAW "
+                              "packet.\n");
+               return NF_ACCEPT;
+       }
+       return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_raw);
 }
 
 /* 'raw' is the very first table. */
-static struct nf_hook_ops ipt_ops[] = {
+static struct nf_hook_ops ipt_ops[] __read_mostly = {
        {
                .hook = ipt_hook,
                .pf = PF_INET,
-               .hooknum = NF_IP_PRE_ROUTING,
+               .hooknum = NF_INET_PRE_ROUTING,
                .priority = NF_IP_PRI_RAW,
                .owner = THIS_MODULE,
        },
        {
-               .hook = ipt_hook,
+               .hook = ipt_local_hook,
                .pf = PF_INET,
-               .hooknum = NF_IP_LOCAL_OUT,
+               .hooknum = NF_INET_LOCAL_OUT,
                .priority = NF_IP_PRI_RAW,
                .owner = THIS_MODULE,
        },
 };
 
+static int __net_init iptable_raw_net_init(struct net *net)
+{
+       /* Register table */
+       net->ipv4.iptable_raw =
+               ipt_register_table(net, &packet_raw, &initial_table.repl);
+       if (IS_ERR(net->ipv4.iptable_raw))
+               return PTR_ERR(net->ipv4.iptable_raw);
+       return 0;
+}
+
+static void __net_exit iptable_raw_net_exit(struct net *net)
+{
+       ipt_unregister_table(net->ipv4.iptable_raw);
+}
+
+static struct pernet_operations iptable_raw_net_ops = {
+       .init = iptable_raw_net_init,
+       .exit = iptable_raw_net_exit,
+};
+
 static int __init iptable_raw_init(void)
 {
        int ret;
 
-       /* Register table */
-       ret = ipt_register_table(&packet_raw, &initial_table.repl);
+       ret = register_pernet_subsys(&iptable_raw_net_ops);
        if (ret < 0)
                return ret;
 
@@ -133,14 +127,14 @@ static int __init iptable_raw_init(void)
        return ret;
 
  cleanup_table:
-       ipt_unregister_table(&packet_raw);
+       unregister_pernet_subsys(&iptable_raw_net_ops);
        return ret;
 }
 
 static void __exit iptable_raw_fini(void)
 {
        nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
-       ipt_unregister_table(&packet_raw);
+       unregister_pernet_subsys(&iptable_raw_net_ops);
 }
 
 module_init(iptable_raw_init);