release/src/router/ebtables/extensions/ebt_standard.c

   1 /* ebt_standard
   2  *
   3  * Authors:
   4  * Bart De Schuymer <bdschuym@pandora.be>
   5  *
   6  * April, 2002
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <getopt.h>
  12 #include "../include/ebtables_u.h"
  13
  14 static struct option opts[] =
  15 {
  16         {0}
  17 };
  18
  19 static void print_help()
  20 {
  21         printf("Standard targets: DROP, ACCEPT, RETURN or CONTINUE;\n"
  22                "The target can also be a user defined chain.\n");
  23 }
  24
  25 static void init(struct ebt_entry_target *t)
  26 {
  27         ((struct ebt_standard_target *)t)->verdict = EBT_CONTINUE;
  28 }
  29
  30 static int parse(int c, char **argv, int argc, const struct ebt_u_entry *entry,
  31    unsigned int *flags, struct ebt_entry_target **target)
  32 {
  33         return 0;
  34 }
  35
  36 static void final_check(const struct ebt_u_entry *entry,
  37    const struct ebt_entry_target *target, const char *name,
  38    unsigned int hookmask, unsigned int time)
  39 {
  40 }
  41
  42 static void print(const struct ebt_u_entry *entry,
  43    const struct ebt_entry_target *target)
  44 {
  45         int verdict = ((struct ebt_standard_target *)target)->verdict;
  46
  47         if (verdict >= 0) {
  48                 struct ebt_u_entries *entries;
  49
  50                 entries = entry->replace->chains[verdict + NF_BR_NUMHOOKS];
  51                 printf("%s", entries->name);
  52                 return;
  53         }
  54         if (verdict == EBT_CONTINUE)
  55                 printf("CONTINUE ");
  56         else if (verdict == EBT_ACCEPT)
  57                 printf("ACCEPT ");
  58         else if (verdict == EBT_DROP)
  59                 printf("DROP ");
  60         else if (verdict == EBT_RETURN)
  61                 printf("RETURN ");
  62         else
  63                 ebt_print_bug("Bad standard target");
  64 }
  65
  66 static int compare(const struct ebt_entry_target *t1,
  67    const struct ebt_entry_target *t2)
  68 {
  69         return ((struct ebt_standard_target *)t1)->verdict ==
  70            ((struct ebt_standard_target *)t2)->verdict;
  71 }
  72
  73 static struct ebt_u_target standard =
  74 {
  75         .name           = "standard",
  76         .size           = sizeof(struct ebt_standard_target) -
  77                           sizeof(struct ebt_entry_target),
  78         .help           = print_help,
  79         .init           = init,
  80         .parse          = parse,
  81         .final_check    = final_check,
  82         .print          = print,
  83         .compare        = compare,
  84         .extra_ops      = opts,
  85 };
  86
  87 void _init(void)
  88 {
  89         ebt_register_target(&standard);
  90 }