Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables to add destination-NAT support. */ |
Jan Engelhardt | 32b8e61 | 2010-07-23 21:16:14 +0200 | [diff] [blame] | 2 | #include <stdbool.h> |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 3 | #include <stdio.h> |
| 4 | #include <netdb.h> |
| 5 | #include <string.h> |
| 6 | #include <stdlib.h> |
| 7 | #include <getopt.h> |
Jan Engelhardt | 5d9678a | 2008-11-20 10:15:35 +0100 | [diff] [blame] | 8 | #include <xtables.h> |
Jan Engelhardt | afe6b35 | 2009-02-21 03:44:36 +0100 | [diff] [blame] | 9 | #include <iptables.h> /* get_kernel_version */ |
Jan Engelhardt | 4e41854 | 2009-02-21 03:46:37 +0100 | [diff] [blame] | 10 | #include <limits.h> /* INT_MAX in ip_tables.h */ |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 11 | #include <linux/netfilter_ipv4/ip_tables.h> |
Jan Engelhardt | 978e27e | 2009-02-21 04:42:32 +0100 | [diff] [blame] | 12 | #include <net/netfilter/nf_nat.h> |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 13 | |
Patrick McHardy | ef399a3 | 2007-05-29 11:24:45 +0000 | [diff] [blame] | 14 | #define IPT_DNAT_OPT_DEST 0x1 |
| 15 | #define IPT_DNAT_OPT_RANDOM 0x2 |
| 16 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 17 | /* Dest NAT data consists of a multi-range, indicating where to map |
| 18 | to. */ |
| 19 | struct ipt_natinfo |
| 20 | { |
Yasuyuki KOZAKAI | 193df8e | 2007-07-24 05:57:28 +0000 | [diff] [blame] | 21 | struct xt_entry_target t; |
Jan Engelhardt | 978e27e | 2009-02-21 04:42:32 +0100 | [diff] [blame] | 22 | struct nf_nat_multi_range mr; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 23 | }; |
| 24 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 25 | static void DNAT_help(void) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 26 | { |
| 27 | printf( |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 28 | "DNAT target options:\n" |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 29 | " --to-destination <ipaddr>[-<ipaddr>][:port-port]\n" |
| 30 | " Address to map destination to.\n" |
Patrick McHardy | 467fa9f | 2009-04-17 18:11:09 +0200 | [diff] [blame] | 31 | "[--random] [--persistent]\n"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 32 | } |
| 33 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 34 | static const struct option DNAT_opts[] = { |
Jan Engelhardt | 32b8e61 | 2010-07-23 21:16:14 +0200 | [diff] [blame] | 35 | {.name = "to-destination", .has_arg = true, .val = '1'}, |
| 36 | {.name = "random", .has_arg = false, .val = '2'}, |
| 37 | {.name = "persistent", .has_arg = false, .val = '3'}, |
| 38 | XT_GETOPT_TABLEEND, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 39 | }; |
| 40 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 41 | static struct ipt_natinfo * |
Jan Engelhardt | 978e27e | 2009-02-21 04:42:32 +0100 | [diff] [blame] | 42 | append_range(struct ipt_natinfo *info, const struct nf_nat_range *range) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 43 | { |
| 44 | unsigned int size; |
| 45 | |
| 46 | /* One rangesize already in struct ipt_natinfo */ |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 47 | size = XT_ALIGN(sizeof(*info) + info->mr.rangesize * sizeof(*range)); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 48 | |
| 49 | info = realloc(info, size); |
| 50 | if (!info) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 51 | xtables_error(OTHER_PROBLEM, "Out of memory\n"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 52 | |
Rusty Russell | 228e98d | 2000-04-27 10:28:06 +0000 | [diff] [blame] | 53 | info->t.u.target_size = size; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 54 | info->mr.range[info->mr.rangesize] = *range; |
| 55 | info->mr.rangesize++; |
| 56 | |
| 57 | return info; |
| 58 | } |
| 59 | |
| 60 | /* Ranges expected in network order. */ |
Yasuyuki KOZAKAI | 193df8e | 2007-07-24 05:57:28 +0000 | [diff] [blame] | 61 | static struct xt_entry_target * |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 62 | parse_to(char *arg, int portok, struct ipt_natinfo *info) |
| 63 | { |
Jan Engelhardt | 978e27e | 2009-02-21 04:42:32 +0100 | [diff] [blame] | 64 | struct nf_nat_range range; |
Phil Oester | 3fb61f3 | 2005-02-01 12:56:16 +0000 | [diff] [blame] | 65 | char *colon, *dash, *error; |
Jan Engelhardt | bd94384 | 2008-01-20 13:38:08 +0000 | [diff] [blame] | 66 | const struct in_addr *ip; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 67 | |
| 68 | memset(&range, 0, sizeof(range)); |
| 69 | colon = strchr(arg, ':'); |
| 70 | |
| 71 | if (colon) { |
| 72 | int port; |
| 73 | |
| 74 | if (!portok) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 75 | xtables_error(PARAMETER_PROBLEM, |
Patrick McHardy | 5a942f9 | 2008-11-04 13:22:40 +0100 | [diff] [blame] | 76 | "Need TCP, UDP, SCTP or DCCP with port specification"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 77 | |
| 78 | range.flags |= IP_NAT_RANGE_PROTO_SPECIFIED; |
| 79 | |
| 80 | port = atoi(colon+1); |
Yasuyuki KOZAKAI | a3a9c0d | 2005-06-22 12:22:44 +0000 | [diff] [blame] | 81 | if (port <= 0 || port > 65535) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 82 | xtables_error(PARAMETER_PROBLEM, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 83 | "Port `%s' not valid\n", colon+1); |
| 84 | |
Phil Oester | 3fb61f3 | 2005-02-01 12:56:16 +0000 | [diff] [blame] | 85 | error = strchr(colon+1, ':'); |
| 86 | if (error) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 87 | xtables_error(PARAMETER_PROBLEM, |
Phil Oester | 3fb61f3 | 2005-02-01 12:56:16 +0000 | [diff] [blame] | 88 | "Invalid port:port syntax - use dash\n"); |
| 89 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 90 | dash = strchr(colon, '-'); |
| 91 | if (!dash) { |
| 92 | range.min.tcp.port |
| 93 | = range.max.tcp.port |
| 94 | = htons(port); |
| 95 | } else { |
| 96 | int maxport; |
| 97 | |
| 98 | maxport = atoi(dash + 1); |
Yasuyuki KOZAKAI | a3a9c0d | 2005-06-22 12:22:44 +0000 | [diff] [blame] | 99 | if (maxport <= 0 || maxport > 65535) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 100 | xtables_error(PARAMETER_PROBLEM, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 101 | "Port `%s' not valid\n", dash+1); |
| 102 | if (maxport < port) |
| 103 | /* People are stupid. */ |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 104 | xtables_error(PARAMETER_PROBLEM, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 105 | "Port range `%s' funky\n", colon+1); |
| 106 | range.min.tcp.port = htons(port); |
| 107 | range.max.tcp.port = htons(maxport); |
| 108 | } |
| 109 | /* Starts with a colon? No IP info...*/ |
| 110 | if (colon == arg) |
| 111 | return &(append_range(info, &range)->t); |
| 112 | *colon = '\0'; |
| 113 | } |
| 114 | |
| 115 | range.flags |= IP_NAT_RANGE_MAP_IPS; |
| 116 | dash = strchr(arg, '-'); |
| 117 | if (colon && dash && dash > colon) |
| 118 | dash = NULL; |
| 119 | |
| 120 | if (dash) |
| 121 | *dash = '\0'; |
| 122 | |
Jan Engelhardt | 1e01b0b | 2009-01-30 04:20:32 +0100 | [diff] [blame] | 123 | ip = xtables_numeric_to_ipaddr(arg); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 124 | if (!ip) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 125 | xtables_error(PARAMETER_PROBLEM, "Bad IP address \"%s\"\n", |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 126 | arg); |
| 127 | range.min_ip = ip->s_addr; |
| 128 | if (dash) { |
Jan Engelhardt | 1e01b0b | 2009-01-30 04:20:32 +0100 | [diff] [blame] | 129 | ip = xtables_numeric_to_ipaddr(dash+1); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 130 | if (!ip) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 131 | xtables_error(PARAMETER_PROBLEM, "Bad IP address \"%s\"\n", |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 132 | dash+1); |
| 133 | range.max_ip = ip->s_addr; |
| 134 | } else |
| 135 | range.max_ip = range.min_ip; |
| 136 | |
| 137 | return &(append_range(info, &range)->t); |
| 138 | } |
| 139 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 140 | static int DNAT_parse(int c, char **argv, int invert, unsigned int *flags, |
| 141 | const void *e, struct xt_entry_target **target) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 142 | { |
Yasuyuki KOZAKAI | ac8b271 | 2007-07-24 06:06:59 +0000 | [diff] [blame] | 143 | const struct ipt_entry *entry = e; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 144 | struct ipt_natinfo *info = (void *)*target; |
| 145 | int portok; |
| 146 | |
| 147 | if (entry->ip.proto == IPPROTO_TCP |
Patrick McHardy | 36d870c | 2005-07-22 06:39:45 +0000 | [diff] [blame] | 148 | || entry->ip.proto == IPPROTO_UDP |
Patrick McHardy | 5a942f9 | 2008-11-04 13:22:40 +0100 | [diff] [blame] | 149 | || entry->ip.proto == IPPROTO_SCTP |
| 150 | || entry->ip.proto == IPPROTO_DCCP |
Patrick McHardy | 36d870c | 2005-07-22 06:39:45 +0000 | [diff] [blame] | 151 | || entry->ip.proto == IPPROTO_ICMP) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 152 | portok = 1; |
| 153 | else |
| 154 | portok = 0; |
| 155 | |
| 156 | switch (c) { |
| 157 | case '1': |
Jan Engelhardt | bf97128 | 2009-11-03 19:55:11 +0100 | [diff] [blame] | 158 | if (xtables_check_inverse(optarg, &invert, NULL, 0, argv)) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 159 | xtables_error(PARAMETER_PROBLEM, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 160 | "Unexpected `!' after --to-destination"); |
| 161 | |
Patrick McHardy | 596c690 | 2009-11-06 17:15:07 +0100 | [diff] [blame] | 162 | if (*flags & IPT_DNAT_OPT_DEST) { |
Phil Oester | 8cf6591 | 2005-09-19 15:00:33 +0000 | [diff] [blame] | 163 | if (!kernel_version) |
| 164 | get_kernel_version(); |
| 165 | if (kernel_version > LINUX_VERSION(2, 6, 10)) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 166 | xtables_error(PARAMETER_PROBLEM, |
Phil Oester | 8cf6591 | 2005-09-19 15:00:33 +0000 | [diff] [blame] | 167 | "Multiple --to-destination not supported"); |
| 168 | } |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 169 | *target = parse_to(optarg, portok, info); |
Patrick McHardy | ef399a3 | 2007-05-29 11:24:45 +0000 | [diff] [blame] | 170 | /* WTF do we need this for?? */ |
| 171 | if (*flags & IPT_DNAT_OPT_RANDOM) |
| 172 | info->mr.range[0].flags |= IP_NAT_RANGE_PROTO_RANDOM; |
| 173 | *flags |= IPT_DNAT_OPT_DEST; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 174 | return 1; |
| 175 | |
Patrick McHardy | ef399a3 | 2007-05-29 11:24:45 +0000 | [diff] [blame] | 176 | case '2': |
| 177 | if (*flags & IPT_DNAT_OPT_DEST) { |
| 178 | info->mr.range[0].flags |= IP_NAT_RANGE_PROTO_RANDOM; |
| 179 | *flags |= IPT_DNAT_OPT_RANDOM; |
| 180 | } else |
| 181 | *flags |= IPT_DNAT_OPT_RANDOM; |
Tom Eastep | 75b4b20 | 2007-11-15 13:06:58 +0000 | [diff] [blame] | 182 | return 1; |
Patrick McHardy | 467fa9f | 2009-04-17 18:11:09 +0200 | [diff] [blame] | 183 | |
| 184 | case '3': |
| 185 | info->mr.range[0].flags |= IP_NAT_RANGE_PERSISTENT; |
| 186 | return 1; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 187 | } |
Jan Engelhardt | d09b6d5 | 2011-01-08 03:02:37 +0100 | [diff] [blame] | 188 | return 0; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 191 | static void DNAT_check(unsigned int flags) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 192 | { |
Jan Engelhardt | 4e5d4bf | 2011-02-19 19:37:53 +0100 | [diff] [blame^] | 193 | if (!(flags & IPT_DNAT_OPT_DEST)) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 194 | xtables_error(PARAMETER_PROBLEM, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 195 | "You must specify --to-destination"); |
| 196 | } |
| 197 | |
Jan Engelhardt | 978e27e | 2009-02-21 04:42:32 +0100 | [diff] [blame] | 198 | static void print_range(const struct nf_nat_range *r) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 199 | { |
| 200 | if (r->flags & IP_NAT_RANGE_MAP_IPS) { |
| 201 | struct in_addr a; |
| 202 | |
| 203 | a.s_addr = r->min_ip; |
Jan Engelhardt | e44ea7f | 2009-01-30 03:55:09 +0100 | [diff] [blame] | 204 | printf("%s", xtables_ipaddr_to_numeric(&a)); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 205 | if (r->max_ip != r->min_ip) { |
| 206 | a.s_addr = r->max_ip; |
Jan Engelhardt | e44ea7f | 2009-01-30 03:55:09 +0100 | [diff] [blame] | 207 | printf("-%s", xtables_ipaddr_to_numeric(&a)); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 208 | } |
| 209 | } |
| 210 | if (r->flags & IP_NAT_RANGE_PROTO_SPECIFIED) { |
| 211 | printf(":"); |
| 212 | printf("%hu", ntohs(r->min.tcp.port)); |
| 213 | if (r->max.tcp.port != r->min.tcp.port) |
| 214 | printf("-%hu", ntohs(r->max.tcp.port)); |
| 215 | } |
| 216 | } |
| 217 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 218 | static void DNAT_print(const void *ip, const struct xt_entry_target *target, |
| 219 | int numeric) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 220 | { |
Jan Engelhardt | 69f564e | 2009-05-26 13:14:06 +0200 | [diff] [blame] | 221 | const struct ipt_natinfo *info = (const void *)target; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 222 | unsigned int i = 0; |
| 223 | |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 224 | printf(" to:"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 225 | for (i = 0; i < info->mr.rangesize; i++) { |
| 226 | print_range(&info->mr.range[i]); |
Patrick McHardy | ef399a3 | 2007-05-29 11:24:45 +0000 | [diff] [blame] | 227 | if (info->mr.range[i].flags & IP_NAT_RANGE_PROTO_RANDOM) |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 228 | printf(" random"); |
Patrick McHardy | 467fa9f | 2009-04-17 18:11:09 +0200 | [diff] [blame] | 229 | if (info->mr.range[i].flags & IP_NAT_RANGE_PERSISTENT) |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 230 | printf(" persistent"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 231 | } |
| 232 | } |
| 233 | |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 234 | static void DNAT_save(const void *ip, const struct xt_entry_target *target) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 235 | { |
Jan Engelhardt | 69f564e | 2009-05-26 13:14:06 +0200 | [diff] [blame] | 236 | const struct ipt_natinfo *info = (const void *)target; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 237 | unsigned int i = 0; |
| 238 | |
| 239 | for (i = 0; i < info->mr.rangesize; i++) { |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 240 | printf(" --to-destination "); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 241 | print_range(&info->mr.range[i]); |
Patrick McHardy | ef399a3 | 2007-05-29 11:24:45 +0000 | [diff] [blame] | 242 | if (info->mr.range[i].flags & IP_NAT_RANGE_PROTO_RANDOM) |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 243 | printf(" --random"); |
Patrick McHardy | 467fa9f | 2009-04-17 18:11:09 +0200 | [diff] [blame] | 244 | if (info->mr.range[i].flags & IP_NAT_RANGE_PERSISTENT) |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 245 | printf(" --persistent"); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 246 | } |
| 247 | } |
| 248 | |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 249 | static struct xtables_target dnat_tg_reg = { |
Pablo Neira | 8caee8b | 2004-12-28 13:11:59 +0000 | [diff] [blame] | 250 | .name = "DNAT", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 251 | .version = XTABLES_VERSION, |
Jan Engelhardt | 03d9948 | 2008-11-18 12:27:54 +0100 | [diff] [blame] | 252 | .family = NFPROTO_IPV4, |
Jan Engelhardt | 978e27e | 2009-02-21 04:42:32 +0100 | [diff] [blame] | 253 | .size = XT_ALIGN(sizeof(struct nf_nat_multi_range)), |
| 254 | .userspacesize = XT_ALIGN(sizeof(struct nf_nat_multi_range)), |
Jan Engelhardt | 1d5b63d | 2007-10-04 16:29:00 +0000 | [diff] [blame] | 255 | .help = DNAT_help, |
| 256 | .parse = DNAT_parse, |
| 257 | .final_check = DNAT_check, |
| 258 | .print = DNAT_print, |
| 259 | .save = DNAT_save, |
| 260 | .extra_opts = DNAT_opts, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 261 | }; |
| 262 | |
| 263 | void _init(void) |
| 264 | { |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 265 | xtables_register_target(&dnat_tg_reg); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 266 | } |