Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 1 | /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu> |
| 2 | * Patrick Schaaf <bof@bof.de> |
| 3 | * Martin Josefsson <gandalf@wlug.westbo.se> |
| 4 | * Copyright (C) 2003-2010 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | /* Shared library add-on to iptables to add IP set mangling target. */ |
Jan Engelhardt | 32b8e61 | 2010-07-23 21:16:14 +0200 | [diff] [blame] | 12 | #include <stdbool.h> |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 13 | #include <stdio.h> |
| 14 | #include <netdb.h> |
| 15 | #include <string.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <getopt.h> |
| 18 | #include <ctype.h> |
| 19 | |
| 20 | #include <xtables.h> |
| 21 | #include <linux/netfilter/xt_set.h> |
| 22 | #include "libxt_set.h" |
| 23 | |
| 24 | static void |
| 25 | set_target_help(void) |
| 26 | { |
| 27 | printf("SET target options:\n" |
| 28 | " --add-set name flags\n" |
| 29 | " --del-set name flags\n" |
| 30 | " add/del src/dst IP/port from/to named sets,\n" |
| 31 | " where flags are the comma separated list of\n" |
| 32 | " 'src' and 'dst' specifications.\n"); |
| 33 | } |
| 34 | |
| 35 | static const struct option set_target_opts[] = { |
Jan Engelhardt | 32b8e61 | 2010-07-23 21:16:14 +0200 | [diff] [blame] | 36 | {.name = "add-set", .has_arg = true, .val = '1'}, |
| 37 | {.name = "del-set", .has_arg = true, .val = '2'}, |
| 38 | XT_GETOPT_TABLEEND, |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 39 | }; |
| 40 | |
| 41 | static void |
| 42 | set_target_check(unsigned int flags) |
| 43 | { |
| 44 | if (!flags) |
| 45 | xtables_error(PARAMETER_PROBLEM, |
| 46 | "You must specify either `--add-set' or `--del-set'"); |
| 47 | } |
| 48 | |
| 49 | static void |
| 50 | set_target_init_v0(struct xt_entry_target *target) |
| 51 | { |
| 52 | struct xt_set_info_target_v0 *info = |
| 53 | (struct xt_set_info_target_v0 *) target->data; |
| 54 | |
| 55 | info->add_set.index = |
| 56 | info->del_set.index = IPSET_INVALID_ID; |
| 57 | |
| 58 | } |
| 59 | |
| 60 | static void |
| 61 | parse_target_v0(char **argv, int invert, unsigned int *flags, |
| 62 | struct xt_set_info_v0 *info, const char *what) |
| 63 | { |
| 64 | if (info->u.flags[0]) |
| 65 | xtables_error(PARAMETER_PROBLEM, |
| 66 | "--%s can be specified only once", what); |
| 67 | |
| 68 | if (xtables_check_inverse(optarg, &invert, NULL, 0, argv)) |
| 69 | xtables_error(PARAMETER_PROBLEM, |
| 70 | "Unexpected `!' after --%s", what); |
| 71 | |
| 72 | if (!argv[optind] |
| 73 | || argv[optind][0] == '-' || argv[optind][0] == '!') |
| 74 | xtables_error(PARAMETER_PROBLEM, |
| 75 | "--%s requires two args.", what); |
| 76 | |
| 77 | if (strlen(optarg) > IPSET_MAXNAMELEN - 1) |
| 78 | xtables_error(PARAMETER_PROBLEM, |
| 79 | "setname `%s' too long, max %d characters.", |
| 80 | optarg, IPSET_MAXNAMELEN - 1); |
| 81 | |
| 82 | get_set_byname(optarg, (struct xt_set_info *)info); |
| 83 | parse_dirs_v0(argv[optind], info); |
| 84 | optind++; |
| 85 | |
| 86 | *flags = 1; |
| 87 | } |
| 88 | |
| 89 | static int |
| 90 | set_target_parse_v0(int c, char **argv, int invert, unsigned int *flags, |
| 91 | const void *entry, struct xt_entry_target **target) |
| 92 | { |
| 93 | struct xt_set_info_target_v0 *myinfo = |
| 94 | (struct xt_set_info_target_v0 *) (*target)->data; |
| 95 | |
| 96 | switch (c) { |
| 97 | case '1': /* --add-set <set> <flags> */ |
| 98 | parse_target_v0(argv, invert, flags, |
| 99 | &myinfo->add_set, "add-set"); |
| 100 | break; |
| 101 | case '2': /* --del-set <set>[:<flags>] <flags> */ |
| 102 | parse_target_v0(argv, invert, flags, |
| 103 | &myinfo->del_set, "del-set"); |
| 104 | break; |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 105 | } |
| 106 | return 1; |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | print_target_v0(const char *prefix, const struct xt_set_info_v0 *info) |
| 111 | { |
| 112 | int i; |
| 113 | char setname[IPSET_MAXNAMELEN]; |
| 114 | |
| 115 | if (info->index == IPSET_INVALID_ID) |
| 116 | return; |
| 117 | get_set_byid(setname, info->index); |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 118 | printf(" %s %s", prefix, setname); |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 119 | for (i = 0; i < IPSET_DIM_MAX; i++) { |
| 120 | if (!info->u.flags[i]) |
| 121 | break; |
| 122 | printf("%s%s", |
| 123 | i == 0 ? " " : ",", |
| 124 | info->u.flags[i] & IPSET_SRC ? "src" : "dst"); |
| 125 | } |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static void |
| 129 | set_target_print_v0(const void *ip, const struct xt_entry_target *target, |
| 130 | int numeric) |
| 131 | { |
| 132 | const struct xt_set_info_target_v0 *info = (const void *)target->data; |
| 133 | |
| 134 | print_target_v0("add-set", &info->add_set); |
| 135 | print_target_v0("del-set", &info->del_set); |
| 136 | } |
| 137 | |
| 138 | static void |
| 139 | set_target_save_v0(const void *ip, const struct xt_entry_target *target) |
| 140 | { |
| 141 | const struct xt_set_info_target_v0 *info = (const void *)target->data; |
| 142 | |
| 143 | print_target_v0("--add-set", &info->add_set); |
| 144 | print_target_v0("--del-set", &info->del_set); |
| 145 | } |
| 146 | |
| 147 | static void |
| 148 | set_target_init(struct xt_entry_target *target) |
| 149 | { |
| 150 | struct xt_set_info_target *info = |
| 151 | (struct xt_set_info_target *) target->data; |
| 152 | |
| 153 | info->add_set.index = |
| 154 | info->del_set.index = IPSET_INVALID_ID; |
| 155 | |
| 156 | } |
| 157 | |
| 158 | static void |
| 159 | parse_target(char **argv, int invert, unsigned int *flags, |
| 160 | struct xt_set_info *info, const char *what) |
| 161 | { |
| 162 | if (info->dim) |
| 163 | xtables_error(PARAMETER_PROBLEM, |
| 164 | "--%s can be specified only once", what); |
| 165 | |
| 166 | if (xtables_check_inverse(optarg, &invert, NULL, 0, argv)) |
| 167 | xtables_error(PARAMETER_PROBLEM, |
| 168 | "Unexpected `!' after --%s", what); |
| 169 | |
| 170 | if (!argv[optind] |
| 171 | || argv[optind][0] == '-' || argv[optind][0] == '!') |
| 172 | xtables_error(PARAMETER_PROBLEM, |
| 173 | "--%s requires two args.", what); |
| 174 | |
| 175 | if (strlen(optarg) > IPSET_MAXNAMELEN - 1) |
| 176 | xtables_error(PARAMETER_PROBLEM, |
| 177 | "setname `%s' too long, max %d characters.", |
| 178 | optarg, IPSET_MAXNAMELEN - 1); |
| 179 | |
| 180 | get_set_byname(optarg, info); |
| 181 | parse_dirs(argv[optind], info); |
| 182 | optind++; |
| 183 | |
| 184 | *flags = 1; |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | set_target_parse(int c, char **argv, int invert, unsigned int *flags, |
| 189 | const void *entry, struct xt_entry_target **target) |
| 190 | { |
| 191 | struct xt_set_info_target *myinfo = |
| 192 | (struct xt_set_info_target *) (*target)->data; |
| 193 | |
| 194 | switch (c) { |
| 195 | case '1': /* --add-set <set> <flags> */ |
| 196 | parse_target(argv, invert, flags, |
| 197 | &myinfo->add_set, "add-set"); |
| 198 | break; |
| 199 | case '2': /* --del-set <set>[:<flags>] <flags> */ |
| 200 | parse_target(argv, invert, flags, |
| 201 | &myinfo->del_set, "del-set"); |
| 202 | break; |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 203 | } |
| 204 | return 1; |
| 205 | } |
| 206 | |
| 207 | static void |
| 208 | print_target(const char *prefix, const struct xt_set_info *info) |
| 209 | { |
| 210 | int i; |
| 211 | char setname[IPSET_MAXNAMELEN]; |
| 212 | |
| 213 | if (info->index == IPSET_INVALID_ID) |
| 214 | return; |
| 215 | get_set_byid(setname, info->index); |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 216 | printf(" %s %s", prefix, setname); |
Jozsef Kadlecsik | 6f03bf7 | 2011-01-21 21:55:05 +0100 | [diff] [blame] | 217 | for (i = 1; i <= info->dim; i++) { |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 218 | printf("%s%s", |
| 219 | i == 1 ? " " : ",", |
| 220 | info->flags & (1 << i) ? "src" : "dst"); |
| 221 | } |
Jozsef Kadlecsik | d40f162 | 2010-06-16 12:45:33 +0200 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | static void |
| 225 | set_target_print(const void *ip, const struct xt_entry_target *target, |
| 226 | int numeric) |
| 227 | { |
| 228 | const struct xt_set_info_target *info = (const void *)target->data; |
| 229 | |
| 230 | print_target("add-set", &info->add_set); |
| 231 | print_target("del-set", &info->del_set); |
| 232 | } |
| 233 | |
| 234 | static void |
| 235 | set_target_save(const void *ip, const struct xt_entry_target *target) |
| 236 | { |
| 237 | const struct xt_set_info_target *info = (const void *)target->data; |
| 238 | |
| 239 | print_target("--add-set", &info->add_set); |
| 240 | print_target("--del-set", &info->del_set); |
| 241 | } |
| 242 | |
| 243 | static struct xtables_target set_tg_reg[] = { |
| 244 | { |
| 245 | .name = "SET", |
| 246 | .revision = 0, |
| 247 | .version = XTABLES_VERSION, |
| 248 | .family = NFPROTO_IPV4, |
| 249 | .size = XT_ALIGN(sizeof(struct xt_set_info_target_v0)), |
| 250 | .userspacesize = XT_ALIGN(sizeof(struct xt_set_info_target_v0)), |
| 251 | .help = set_target_help, |
| 252 | .init = set_target_init_v0, |
| 253 | .parse = set_target_parse_v0, |
| 254 | .final_check = set_target_check, |
| 255 | .print = set_target_print_v0, |
| 256 | .save = set_target_save_v0, |
| 257 | .extra_opts = set_target_opts, |
| 258 | }, |
| 259 | { |
| 260 | .name = "SET", |
| 261 | .revision = 1, |
| 262 | .version = XTABLES_VERSION, |
| 263 | .family = NFPROTO_UNSPEC, |
| 264 | .size = XT_ALIGN(sizeof(struct xt_set_info_target)), |
| 265 | .userspacesize = XT_ALIGN(sizeof(struct xt_set_info_target)), |
| 266 | .help = set_target_help, |
| 267 | .init = set_target_init, |
| 268 | .parse = set_target_parse, |
| 269 | .final_check = set_target_check, |
| 270 | .print = set_target_print, |
| 271 | .save = set_target_save, |
| 272 | .extra_opts = set_target_opts, |
| 273 | }, |
| 274 | }; |
| 275 | |
| 276 | void _init(void) |
| 277 | { |
| 278 | xtables_register_targets(set_tg_reg, ARRAY_SIZE(set_tg_reg)); |
| 279 | } |