1*a71a9546SAutomerger Merge Worker /* ebt_arpreply
2*a71a9546SAutomerger Merge Worker *
3*a71a9546SAutomerger Merge Worker * Authors:
4*a71a9546SAutomerger Merge Worker * Grzegorz Borowiak <[email protected]>
5*a71a9546SAutomerger Merge Worker * Bart De Schuymer <[email protected]>
6*a71a9546SAutomerger Merge Worker *
7*a71a9546SAutomerger Merge Worker * August, 2003
8*a71a9546SAutomerger Merge Worker */
9*a71a9546SAutomerger Merge Worker
10*a71a9546SAutomerger Merge Worker #include <stdio.h>
11*a71a9546SAutomerger Merge Worker #include <string.h>
12*a71a9546SAutomerger Merge Worker #include <stdlib.h>
13*a71a9546SAutomerger Merge Worker #include <getopt.h>
14*a71a9546SAutomerger Merge Worker #include <xtables.h>
15*a71a9546SAutomerger Merge Worker #include <netinet/ether.h>
16*a71a9546SAutomerger Merge Worker #include <linux/netfilter_bridge/ebt_arpreply.h>
17*a71a9546SAutomerger Merge Worker #include "iptables/nft.h"
18*a71a9546SAutomerger Merge Worker #include "iptables/nft-bridge.h"
19*a71a9546SAutomerger Merge Worker
20*a71a9546SAutomerger Merge Worker #define OPT_REPLY_MAC 0x01
21*a71a9546SAutomerger Merge Worker #define OPT_REPLY_TARGET 0x02
22*a71a9546SAutomerger Merge Worker
23*a71a9546SAutomerger Merge Worker #define REPLY_MAC '1'
24*a71a9546SAutomerger Merge Worker #define REPLY_TARGET '2'
25*a71a9546SAutomerger Merge Worker static const struct option brarpreply_opts[] = {
26*a71a9546SAutomerger Merge Worker { "arpreply-mac" , required_argument, 0, REPLY_MAC },
27*a71a9546SAutomerger Merge Worker { "arpreply-target" , required_argument, 0, REPLY_TARGET },
28*a71a9546SAutomerger Merge Worker XT_GETOPT_TABLEEND,
29*a71a9546SAutomerger Merge Worker };
30*a71a9546SAutomerger Merge Worker
brarpreply_print_help(void)31*a71a9546SAutomerger Merge Worker static void brarpreply_print_help(void)
32*a71a9546SAutomerger Merge Worker {
33*a71a9546SAutomerger Merge Worker printf(
34*a71a9546SAutomerger Merge Worker "arpreply target options:\n"
35*a71a9546SAutomerger Merge Worker " --arpreply-mac address : source MAC of generated reply\n"
36*a71a9546SAutomerger Merge Worker " --arpreply-target target : ACCEPT, DROP, RETURN or CONTINUE\n"
37*a71a9546SAutomerger Merge Worker " (standard target is DROP)\n");
38*a71a9546SAutomerger Merge Worker }
39*a71a9546SAutomerger Merge Worker
brarpreply_init(struct xt_entry_target * target)40*a71a9546SAutomerger Merge Worker static void brarpreply_init(struct xt_entry_target *target)
41*a71a9546SAutomerger Merge Worker {
42*a71a9546SAutomerger Merge Worker struct ebt_arpreply_info *replyinfo = (void *)target->data;
43*a71a9546SAutomerger Merge Worker
44*a71a9546SAutomerger Merge Worker replyinfo->target = EBT_DROP;
45*a71a9546SAutomerger Merge Worker }
46*a71a9546SAutomerger Merge Worker
47*a71a9546SAutomerger Merge Worker static int
brarpreply_parse(int c,char ** argv,int invert,unsigned int * flags,const void * entry,struct xt_entry_target ** tg)48*a71a9546SAutomerger Merge Worker brarpreply_parse(int c, char **argv, int invert, unsigned int *flags,
49*a71a9546SAutomerger Merge Worker const void *entry, struct xt_entry_target **tg)
50*a71a9546SAutomerger Merge Worker
51*a71a9546SAutomerger Merge Worker {
52*a71a9546SAutomerger Merge Worker struct ebt_arpreply_info *replyinfo = (void *)(*tg)->data;
53*a71a9546SAutomerger Merge Worker struct ether_addr *addr;
54*a71a9546SAutomerger Merge Worker
55*a71a9546SAutomerger Merge Worker switch (c) {
56*a71a9546SAutomerger Merge Worker case REPLY_MAC:
57*a71a9546SAutomerger Merge Worker EBT_CHECK_OPTION(flags, OPT_REPLY_MAC);
58*a71a9546SAutomerger Merge Worker if (!(addr = ether_aton(optarg)))
59*a71a9546SAutomerger Merge Worker xtables_error(PARAMETER_PROBLEM, "Problem with specified --arpreply-mac mac");
60*a71a9546SAutomerger Merge Worker memcpy(replyinfo->mac, addr, ETH_ALEN);
61*a71a9546SAutomerger Merge Worker break;
62*a71a9546SAutomerger Merge Worker case REPLY_TARGET:
63*a71a9546SAutomerger Merge Worker EBT_CHECK_OPTION(flags, OPT_REPLY_TARGET);
64*a71a9546SAutomerger Merge Worker if (ebt_fill_target(optarg, (unsigned int *)&replyinfo->target))
65*a71a9546SAutomerger Merge Worker xtables_error(PARAMETER_PROBLEM, "Illegal --arpreply-target target");
66*a71a9546SAutomerger Merge Worker break;
67*a71a9546SAutomerger Merge Worker
68*a71a9546SAutomerger Merge Worker default:
69*a71a9546SAutomerger Merge Worker return 0;
70*a71a9546SAutomerger Merge Worker }
71*a71a9546SAutomerger Merge Worker return 1;
72*a71a9546SAutomerger Merge Worker }
73*a71a9546SAutomerger Merge Worker
brarpreply_print(const void * ip,const struct xt_entry_target * t,int numeric)74*a71a9546SAutomerger Merge Worker static void brarpreply_print(const void *ip, const struct xt_entry_target *t, int numeric)
75*a71a9546SAutomerger Merge Worker {
76*a71a9546SAutomerger Merge Worker struct ebt_arpreply_info *replyinfo = (void *)t->data;
77*a71a9546SAutomerger Merge Worker
78*a71a9546SAutomerger Merge Worker printf("--arpreply-mac ");
79*a71a9546SAutomerger Merge Worker xtables_print_mac(replyinfo->mac);
80*a71a9546SAutomerger Merge Worker if (replyinfo->target == EBT_DROP)
81*a71a9546SAutomerger Merge Worker return;
82*a71a9546SAutomerger Merge Worker printf(" --arpreply-target %s", ebt_target_name(replyinfo->target));
83*a71a9546SAutomerger Merge Worker }
84*a71a9546SAutomerger Merge Worker
85*a71a9546SAutomerger Merge Worker static struct xtables_target arpreply_target = {
86*a71a9546SAutomerger Merge Worker .name = "arpreply",
87*a71a9546SAutomerger Merge Worker .version = XTABLES_VERSION,
88*a71a9546SAutomerger Merge Worker .family = NFPROTO_BRIDGE,
89*a71a9546SAutomerger Merge Worker .init = brarpreply_init,
90*a71a9546SAutomerger Merge Worker .size = XT_ALIGN(sizeof(struct ebt_arpreply_info)),
91*a71a9546SAutomerger Merge Worker .userspacesize = XT_ALIGN(sizeof(struct ebt_arpreply_info)),
92*a71a9546SAutomerger Merge Worker .help = brarpreply_print_help,
93*a71a9546SAutomerger Merge Worker .parse = brarpreply_parse,
94*a71a9546SAutomerger Merge Worker .print = brarpreply_print,
95*a71a9546SAutomerger Merge Worker .extra_opts = brarpreply_opts,
96*a71a9546SAutomerger Merge Worker };
97*a71a9546SAutomerger Merge Worker
_init(void)98*a71a9546SAutomerger Merge Worker void _init(void)
99*a71a9546SAutomerger Merge Worker {
100*a71a9546SAutomerger Merge Worker xtables_register_target(&arpreply_target);
101*a71a9546SAutomerger Merge Worker }
102