release/src-rt-6.x.4708/linux/linux-2.6.36/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 *pskb,
  11                                 const struct xt_action_param *par)
  12 {
  13         const struct xt_imq_info *mr = par->targinfo;
  14
  15         pskb->imq_flags = (mr->todev & IMQ_F_IFMASK) | IMQ_F_ENQUEUE;
  16
  17         return XT_CONTINUE;
  18 }
  19
  20 static int imq_checkentry(const struct xt_tgchk_param *par)
  21 {
  22         struct xt_imq_info *mr = par->targinfo;
  23
  24         if (mr->todev > IMQ_MAX_DEVS - 1) {
  25                 printk(KERN_WARNING
  26                        "IMQ: invalid device specified, highest is %u\n",
  27                        IMQ_MAX_DEVS - 1);
  28                 return -EINVAL;
  29         }
  30
  31         return 0;
  32 }
  33
  34 static struct xt_target xt_imq_reg[] __read_mostly = {
  35         {
  36                 .name           = "IMQ",
  37                 .family         = AF_INET,
  38                 .checkentry     = imq_checkentry,
  39                 .target         = imq_target,
  40                 .targetsize     = sizeof(struct xt_imq_info),
  41                 .table          = "mangle",
  42                 .me             = THIS_MODULE
  43         },
  44         {
  45                 .name           = "IMQ",
  46                 .family         = AF_INET6,
  47                 .checkentry     = imq_checkentry,
  48                 .target         = imq_target,
  49                 .targetsize     = sizeof(struct xt_imq_info),
  50                 .table          = "mangle",
  51                 .me             = THIS_MODULE
  52         },
  53 };
  54
  55 static int __init imq_init(void)
  56 {
  57         return xt_register_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
  58 }
  59
  60 static void __exit imq_fini(void)
  61 {
  62         xt_unregister_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
  63 }
  64
  65 module_init(imq_init);
  66 module_exit(imq_fini);
  67
  68 MODULE_AUTHOR("http://www.linuximq.net");
  69 MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. "
  70                    "See http://www.linuximq.net/ for more information.");
  71 MODULE_LICENSE("GPL");
  72 MODULE_ALIAS("ipt_IMQ");
  73 MODULE_ALIAS("ip6t_IMQ");
  74