release/src/router/iptables/extensions/libipt_exp.c

   1 /*
   2
   3         Experimental Netfilter Crap
   4         Copyright (C) 2006 Jonathan Zarate
   5
   6 */
   7
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <stdlib.h>
  11 #include <getopt.h>
  12
  13 #include <iptables.h>
  14 #include <linux/netfilter_ipv4/ipt_exp.h>
  15
  16
  17 static void help(void)
  18 {
  19         printf(
  20                 "exp match v0.00 options:\n"
  21                 "  how should I know?!\n");
  22 }
  23
  24 static void init(struct ipt_entry_match *m, unsigned int *nfcache)
  25 {
  26         *nfcache |= NFC_UNKNOWN;
  27 }
  28
  29 static struct option opts[] = {
  30         { .name = "foo",  .has_arg = 0, .flag = 0, .val = '1' },
  31         { .name = 0 }
  32 };
  33
  34 static int parse(int c, char **argv, int invert, unsigned int *flags,
  35                                  const struct ipt_entry *entry, unsigned int *nfcache,
  36                                  struct ipt_entry_match **match)
  37 {
  38         struct ipt_exp_info *info;
  39
  40         if ((c < '1') || (c > '1')) return 0;
  41
  42         // reserved
  43
  44         info = (struct ipt_exp_info *)(*match)->data;
  45         switch (c) {
  46         case '1':
  47                 info->dummy = 1;        // blah
  48                 break;
  49         }
  50         return 1;
  51 }
  52
  53 static void final_check(unsigned int flags)
  54 {
  55 }
  56
  57 static void print(const struct ipt_ip *ip, const struct ipt_entry_match *match, int numeric)
  58 {
  59         printf("exp ");
  60 }
  61
  62 static void save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
  63 {
  64 }
  65
  66
  67 static struct iptables_match exp_match = {
  68         .name          = "exp",
  69         .version       = IPTABLES_VERSION,
  70         .size          = IPT_ALIGN(sizeof(struct ipt_exp_info)),
  71         .userspacesize = IPT_ALIGN(sizeof(struct ipt_exp_info)),
  72         .help          = &help,
  73         .init          = &init,
  74         .parse         = &parse,
  75         .final_check   = &final_check,
  76         .print         = &print,
  77         .save          = &save,
  78         .extra_opts    = opts
  79 };
  80
  81 void _init(void)
  82 {
  83         register_match(&exp_match);
  84 }