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

   1 /*
   2  * This target marks packets to be enqueued to an imq device
   3  */
   4 #include <linux/module.h>
   5 #include <linux/skbuff.h>
   6 #include <linux/netfilter/x_tables.h>
   7 #include <linux/netfilter/xt_IMQ.h>
   8 #include <linux/imq.h>
   9
  10 static unsigned int imq_target(struct sk_buff *skb,
  11                                const struct net_device *in,
  12                                const struct net_device *out,
  13                                unsigned int hooknum,
  14                                const struct xt_target *target,
  15                                const void *targinfo)
  16 {
  17         struct xt_imq_info *mr = (struct xt_imq_info*)targinfo;
  18
  19         skb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
  20
  21         return XT_CONTINUE;
  22 }
  23
  24 static int imq_checkentry(const char *tablename,
  25                           const void *e,
  26                           const struct xt_target *target,
  27                           void *targinfo,
  28                           unsigned int hook_mask)
  29 {
  30         struct xt_imq_info *mr = (struct xt_imq_info*)targinfo;
  31
  32         if (mr->todev > IMQ_MAX_DEVS) {
  33                 printk(KERN_WARNING
  34                        "IMQ: invalid device specified, highest is %u\n",
  35                        IMQ_MAX_DEVS);
  36                 return 0;
  37         }
  38
  39         return 1;
  40 }
  41
  42 static struct xt_target xt_imq_reg[] __read_mostly = {
  43         {
  44                 .name           = "IMQ",
  45                 .family         = AF_INET,
  46                 .target         = imq_target,
  47                 .targetsize     = sizeof(struct xt_imq_info),
  48                 .checkentry     = imq_checkentry,
  49                 .me             = THIS_MODULE,
  50                 .table          = "mangle"
  51         },
  52         {
  53                 .name           = "IMQ",
  54                 .family         = AF_INET6,
  55                 .target         = imq_target,
  56                 .targetsize     = sizeof(struct xt_imq_info),
  57                 .table          = "mangle",
  58                 .checkentry     = imq_checkentry,
  59                 .me             = THIS_MODULE
  60         },
  61 };
  62
  63 static int __init init(void)
  64 {
  65         return xt_register_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
  66 }
  67
  68 static void __exit fini(void)
  69 {
  70         xt_unregister_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
  71 }
  72
  73 module_init(init);
  74 module_exit(fini);
  75
  76 MODULE_ALIAS("ipt_IMQ");
  77 MODULE_ALIAS("ip6t_IMQ");
  78 MODULE_AUTHOR("http://www.linuximq.net");
  79 MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
  80 MODULE_LICENSE("GPL");