release/src-rt-6.x/linux/linux-2.6/net/ipv4/netfilter/ipt_exp.c

   1 /*
   2
   3         Experimental Netfilter Crap
   4         Copyright (C) 2006 Jonathan Zarate
   5
   6 */
   7 #include <linux/module.h>
   8 #include <linux/skbuff.h>
   9 #include <linux/version.h>
  10 #include <linux/file.h>
  11 #include <net/sock.h>
  12
  13 #include <linux/netfilter_ipv4/ip_tables.h>
  14 #include <linux/netfilter_ipv4/ipt_exp.h>
  15 #include "../../bridge/br_private.h"
  16
  17
  18 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
  19 static int
  20 #else
  21 static bool
  22 #endif
  23 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
  24 match(const struct sk_buff *skb, const struct net_device *in, const struct net_device *out,
  25         const struct xt_match *match, const void *matchinfo, int offset,
  26         unsigned int protoff, int *hotdrop)
  27 #else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) */
  28 match(const struct sk_buff *skb, const struct xt_match_param *par)
  29 #endif
  30 {
  31 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
  32 //      const struct ipt_exp_info *info = matchinfo;
  33 #else
  34 //      const struct ipt_exp_info *info = par->matchinfo;
  35 #endif
  36
  37         if ((skb_mac_header(skb) >= skb->head) && ((skb_mac_header(skb) + ETH_HLEN) <= skb->data)) {
  38                 printk(KERN_INFO "exp src=%02X:%02X:%02X:%02X:%02X:%02X dst=%02X:%02X:%02X:%02X:%02X:%02X\n",
  39                         eth_hdr(skb)->h_source[0], eth_hdr(skb)->h_source[1], eth_hdr(skb)->h_source[2],
  40                         eth_hdr(skb)->h_source[3], eth_hdr(skb)->h_source[4], eth_hdr(skb)->h_source[5],
  41                         eth_hdr(skb)->h_dest[0], eth_hdr(skb)->h_dest[1], eth_hdr(skb)->h_dest[2],
  42                         eth_hdr(skb)->h_dest[3], eth_hdr(skb)->h_dest[4], eth_hdr(skb)->h_dest[5]);
  43                 return 1;
  44         }
  45         printk(KERN_INFO "exp mac=%p head=%p in=%p\n", skb_mac_header(skb), skb->head, in);
  46         return 0;
  47 }
  48
  49 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
  50 static int
  51 #else
  52 static bool
  53 #endif
  54 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
  55 checkentry(const char *tablename, const void *inf, const struct xt_match *match,
  56         void *matchinfo, unsigned int hook_mask)
  57 #else
  58 checkentry(const struct xt_mtchk_param *par)
  59 #endif
  60 {
  61         return 1;
  62 }
  63
  64 static struct xt_match exp_match = {
  65         .name           = "exp",
  66         .family         = AF_INET,
  67         .match          = &match,
  68         .matchsize      = sizeof(struct ipt_exp_info),
  69         .checkentry     = &checkentry,
  70         .destroy        = NULL,
  71         .me             = THIS_MODULE
  72 };
  73
  74 static int __init init(void)
  75 {
  76         printk(KERN_INFO "exp init " __DATE__ " " __TIME__ "\n");
  77         return xt_register_match(&exp_match);
  78 }
  79
  80 static void __exit fini(void)
  81 {
  82         printk(KERN_INFO "exp fini\n");
  83         xt_unregister_match(&exp_match);
  84 }
  85
  86 module_init(init);
  87 module_exit(fini);
  88 MODULE_LICENSE("GPL");