Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables for SCTP matching |
| 2 | * |
| 3 | * (C) 2003 by Harald Welte <laforge@gnumonks.org> |
| 4 | * |
| 5 | * This program is distributed under the terms of GNU GPL v2, 1991 |
| 6 | * |
| 7 | * libipt_ecn.c borrowed heavily from libipt_dscp.c |
| 8 | * |
| 9 | */ |
| 10 | #include <stdio.h> |
| 11 | #include <string.h> |
| 12 | #include <stdlib.h> |
| 13 | #include <getopt.h> |
| 14 | #include <netdb.h> |
| 15 | #include <ctype.h> |
| 16 | |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 17 | #include <xtables.h> |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 18 | |
| 19 | #ifndef ARRAY_SIZE |
| 20 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
| 21 | #endif |
| 22 | |
| 23 | #include <linux/netfilter/xt_sctp.h> |
| 24 | |
| 25 | /* Some ZS!#@:$%*#$! has replaced the ELEMCOUNT macro in ipt_sctp.h with |
Jan Engelhardt | ddac6c5 | 2008-09-01 14:22:19 +0200 | [diff] [blame^] | 26 | * ARRAY_SIZE without noticing that this file is used from userspace, |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 27 | * and userspace doesn't have ARRAY_SIZE */ |
| 28 | |
| 29 | #ifndef ELEMCOUNT |
| 30 | #define ELEMCOUNT ARRAY_SIZE |
| 31 | #endif |
| 32 | |
| 33 | #if 0 |
| 34 | #define DEBUGP(format, first...) printf(format, ##first) |
| 35 | #define static |
| 36 | #else |
| 37 | #define DEBUGP(format, fist...) |
| 38 | #endif |
| 39 | |
| 40 | static void |
| 41 | print_chunk(u_int32_t chunknum, int numeric); |
| 42 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 43 | static void sctp_init(struct xt_entry_match *m) |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 44 | { |
| 45 | int i; |
| 46 | struct xt_sctp_info *einfo = (struct xt_sctp_info *)m->data; |
| 47 | |
| 48 | memset(einfo, 0, sizeof(struct xt_sctp_info)); |
| 49 | |
| 50 | for (i = 0; i < XT_NUM_SCTP_FLAGS; i++) { |
| 51 | einfo->flag_info[i].chunktype = -1; |
| 52 | } |
| 53 | } |
| 54 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 55 | static void sctp_help(void) |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 56 | { |
| 57 | printf( |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 58 | "sctp match options\n" |
Jan Engelhardt | 9672792 | 2008-08-13 14:42:41 +0200 | [diff] [blame] | 59 | "[!] --source-port port[:port] match source port(s)\n" |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 60 | " --sport ...\n" |
Jan Engelhardt | 9672792 | 2008-08-13 14:42:41 +0200 | [diff] [blame] | 61 | "[!] --destination-port port[:port] match destination port(s)\n" |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 62 | " --dport ...\n" |
Jan Engelhardt | 9672792 | 2008-08-13 14:42:41 +0200 | [diff] [blame] | 63 | "[!] --chunk-types (all|any|none) (chunktype[:flags])+ match if all, any or none of\n" |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 64 | " chunktypes are present\n" |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 65 | "chunktypes - DATA INIT INIT_ACK SACK HEARTBEAT HEARTBEAT_ACK ABORT SHUTDOWN SHUTDOWN_ACK ERROR COOKIE_ECHO COOKIE_ACK ECN_ECNE ECN_CWR SHUTDOWN_COMPLETE ASCONF ASCONF_ACK ALL NONE\n"); |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 66 | } |
| 67 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 68 | static const struct option sctp_opts[] = { |
Patrick McHardy | 500f483 | 2007-09-08 15:59:04 +0000 | [diff] [blame] | 69 | { .name = "source-port", .has_arg = 1, .val = '1' }, |
| 70 | { .name = "sport", .has_arg = 1, .val = '1' }, |
| 71 | { .name = "destination-port", .has_arg = 1, .val = '2' }, |
| 72 | { .name = "dport", .has_arg = 1, .val = '2' }, |
| 73 | { .name = "chunk-types", .has_arg = 1, .val = '3' }, |
Max Kellermann | 9ee386a | 2008-01-29 13:48:05 +0000 | [diff] [blame] | 74 | { .name = NULL } |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 75 | }; |
| 76 | |
| 77 | static void |
| 78 | parse_sctp_ports(const char *portstring, |
| 79 | u_int16_t *ports) |
| 80 | { |
| 81 | char *buffer; |
| 82 | char *cp; |
| 83 | |
| 84 | buffer = strdup(portstring); |
| 85 | DEBUGP("%s\n", portstring); |
| 86 | if ((cp = strchr(buffer, ':')) == NULL) { |
| 87 | ports[0] = ports[1] = parse_port(buffer, "sctp"); |
| 88 | } |
| 89 | else { |
| 90 | *cp = '\0'; |
| 91 | cp++; |
| 92 | |
| 93 | ports[0] = buffer[0] ? parse_port(buffer, "sctp") : 0; |
| 94 | ports[1] = cp[0] ? parse_port(cp, "sctp") : 0xFFFF; |
| 95 | |
| 96 | if (ports[0] > ports[1]) |
| 97 | exit_error(PARAMETER_PROBLEM, |
| 98 | "invalid portrange (min > max)"); |
| 99 | } |
| 100 | free(buffer); |
| 101 | } |
| 102 | |
| 103 | struct sctp_chunk_names { |
| 104 | const char *name; |
| 105 | unsigned int chunk_type; |
| 106 | const char *valid_flags; |
| 107 | }; |
| 108 | |
| 109 | /*'ALL' and 'NONE' will be treated specially. */ |
Jan Engelhardt | 0e2abed | 2007-10-04 16:25:58 +0000 | [diff] [blame] | 110 | static const struct sctp_chunk_names sctp_chunk_names[] |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 111 | = { { .name = "DATA", .chunk_type = 0, .valid_flags = "-----UBE"}, |
| 112 | { .name = "INIT", .chunk_type = 1, .valid_flags = "--------"}, |
| 113 | { .name = "INIT_ACK", .chunk_type = 2, .valid_flags = "--------"}, |
| 114 | { .name = "SACK", .chunk_type = 3, .valid_flags = "--------"}, |
| 115 | { .name = "HEARTBEAT", .chunk_type = 4, .valid_flags = "--------"}, |
| 116 | { .name = "HEARTBEAT_ACK", .chunk_type = 5, .valid_flags = "--------"}, |
| 117 | { .name = "ABORT", .chunk_type = 6, .valid_flags = "-------T"}, |
| 118 | { .name = "SHUTDOWN", .chunk_type = 7, .valid_flags = "--------"}, |
| 119 | { .name = "SHUTDOWN_ACK", .chunk_type = 8, .valid_flags = "--------"}, |
| 120 | { .name = "ERROR", .chunk_type = 9, .valid_flags = "--------"}, |
| 121 | { .name = "COOKIE_ECHO", .chunk_type = 10, .valid_flags = "--------"}, |
| 122 | { .name = "COOKIE_ACK", .chunk_type = 11, .valid_flags = "--------"}, |
| 123 | { .name = "ECN_ECNE", .chunk_type = 12, .valid_flags = "--------"}, |
| 124 | { .name = "ECN_CWR", .chunk_type = 13, .valid_flags = "--------"}, |
| 125 | { .name = "SHUTDOWN_COMPLETE", .chunk_type = 14, .valid_flags = "-------T"}, |
Naohiro Ooiwa | ecd7f5e | 2008-02-29 12:45:27 +0000 | [diff] [blame] | 126 | { .name = "ASCONF", .chunk_type = 193, .valid_flags = "--------"}, |
| 127 | { .name = "ASCONF_ACK", .chunk_type = 128, .valid_flags = "--------"}, |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 128 | }; |
| 129 | |
| 130 | static void |
| 131 | save_chunk_flag_info(struct xt_sctp_flag_info *flag_info, |
| 132 | int *flag_count, |
| 133 | int chunktype, |
| 134 | int bit, |
| 135 | int set) |
| 136 | { |
| 137 | int i; |
| 138 | |
| 139 | for (i = 0; i < *flag_count; i++) { |
| 140 | if (flag_info[i].chunktype == chunktype) { |
| 141 | DEBUGP("Previous match found\n"); |
| 142 | flag_info[i].chunktype = chunktype; |
| 143 | flag_info[i].flag_mask |= (1 << bit); |
| 144 | if (set) { |
| 145 | flag_info[i].flag |= (1 << bit); |
| 146 | } |
| 147 | |
| 148 | return; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | if (*flag_count == XT_NUM_SCTP_FLAGS) { |
| 153 | exit_error (PARAMETER_PROBLEM, |
| 154 | "Number of chunk types with flags exceeds currently allowed limit." |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 155 | "Increasing this limit involves changing IPT_NUM_SCTP_FLAGS and" |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 156 | "recompiling both the kernel space and user space modules\n"); |
| 157 | } |
| 158 | |
| 159 | flag_info[*flag_count].chunktype = chunktype; |
| 160 | flag_info[*flag_count].flag_mask |= (1 << bit); |
| 161 | if (set) { |
| 162 | flag_info[*flag_count].flag |= (1 << bit); |
| 163 | } |
| 164 | (*flag_count)++; |
| 165 | } |
| 166 | |
| 167 | static void |
| 168 | parse_sctp_chunk(struct xt_sctp_info *einfo, |
| 169 | const char *chunks) |
| 170 | { |
| 171 | char *ptr; |
| 172 | char *buffer; |
| 173 | unsigned int i, j; |
| 174 | int found = 0; |
| 175 | char *chunk_flags; |
| 176 | |
| 177 | buffer = strdup(chunks); |
| 178 | DEBUGP("Buffer: %s\n", buffer); |
| 179 | |
| 180 | SCTP_CHUNKMAP_RESET(einfo->chunkmap); |
| 181 | |
| 182 | if (!strcasecmp(buffer, "ALL")) { |
| 183 | SCTP_CHUNKMAP_SET_ALL(einfo->chunkmap); |
| 184 | goto out; |
| 185 | } |
| 186 | |
| 187 | if (!strcasecmp(buffer, "NONE")) { |
| 188 | SCTP_CHUNKMAP_RESET(einfo->chunkmap); |
| 189 | goto out; |
| 190 | } |
| 191 | |
| 192 | for (ptr = strtok(buffer, ","); ptr; ptr = strtok(NULL, ",")) { |
| 193 | found = 0; |
| 194 | DEBUGP("Next Chunk type %s\n", ptr); |
| 195 | |
| 196 | if ((chunk_flags = strchr(ptr, ':')) != NULL) { |
| 197 | *chunk_flags++ = 0; |
| 198 | } |
| 199 | |
| 200 | for (i = 0; i < ELEMCOUNT(sctp_chunk_names); i++) { |
| 201 | if (strcasecmp(sctp_chunk_names[i].name, ptr) == 0) { |
| 202 | DEBUGP("Chunk num %d\n", sctp_chunk_names[i].chunk_type); |
| 203 | SCTP_CHUNKMAP_SET(einfo->chunkmap, |
| 204 | sctp_chunk_names[i].chunk_type); |
| 205 | found = 1; |
| 206 | break; |
| 207 | } |
| 208 | } |
| 209 | if (!found) |
| 210 | exit_error(PARAMETER_PROBLEM, |
| 211 | "Unknown sctp chunk `%s'", ptr); |
| 212 | |
| 213 | if (chunk_flags) { |
| 214 | DEBUGP("Chunk flags %s\n", chunk_flags); |
| 215 | for (j = 0; j < strlen(chunk_flags); j++) { |
| 216 | char *p; |
| 217 | int bit; |
| 218 | |
| 219 | if ((p = strchr(sctp_chunk_names[i].valid_flags, |
| 220 | toupper(chunk_flags[j]))) != NULL) { |
| 221 | bit = p - sctp_chunk_names[i].valid_flags; |
| 222 | bit = 7 - bit; |
| 223 | |
| 224 | save_chunk_flag_info(einfo->flag_info, |
| 225 | &(einfo->flag_count), i, bit, |
| 226 | isupper(chunk_flags[j])); |
| 227 | } else { |
| 228 | exit_error(PARAMETER_PROBLEM, |
| 229 | "Invalid flags for chunk type %d\n", i); |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | out: |
| 235 | free(buffer); |
| 236 | } |
| 237 | |
| 238 | static void |
| 239 | parse_sctp_chunks(struct xt_sctp_info *einfo, |
| 240 | const char *match_type, |
| 241 | const char *chunks) |
| 242 | { |
| 243 | DEBUGP("Match type: %s Chunks: %s\n", match_type, chunks); |
| 244 | if (!strcasecmp(match_type, "ANY")) { |
| 245 | einfo->chunk_match_type = SCTP_CHUNK_MATCH_ANY; |
| 246 | } else if (!strcasecmp(match_type, "ALL")) { |
| 247 | einfo->chunk_match_type = SCTP_CHUNK_MATCH_ALL; |
| 248 | } else if (!strcasecmp(match_type, "ONLY")) { |
| 249 | einfo->chunk_match_type = SCTP_CHUNK_MATCH_ONLY; |
| 250 | } else { |
| 251 | exit_error (PARAMETER_PROBLEM, |
| 252 | "Match type has to be one of \"ALL\", \"ANY\" or \"ONLY\""); |
| 253 | } |
| 254 | |
| 255 | SCTP_CHUNKMAP_RESET(einfo->chunkmap); |
| 256 | parse_sctp_chunk(einfo, chunks); |
| 257 | } |
| 258 | |
| 259 | static int |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 260 | sctp_parse(int c, char **argv, int invert, unsigned int *flags, |
| 261 | const void *entry, struct xt_entry_match **match) |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 262 | { |
| 263 | struct xt_sctp_info *einfo |
| 264 | = (struct xt_sctp_info *)(*match)->data; |
| 265 | |
| 266 | switch (c) { |
| 267 | case '1': |
| 268 | if (*flags & XT_SCTP_SRC_PORTS) |
| 269 | exit_error(PARAMETER_PROBLEM, |
| 270 | "Only one `--source-port' allowed"); |
| 271 | einfo->flags |= XT_SCTP_SRC_PORTS; |
| 272 | check_inverse(optarg, &invert, &optind, 0); |
| 273 | parse_sctp_ports(argv[optind-1], einfo->spts); |
| 274 | if (invert) |
| 275 | einfo->invflags |= XT_SCTP_SRC_PORTS; |
| 276 | *flags |= XT_SCTP_SRC_PORTS; |
| 277 | break; |
| 278 | |
| 279 | case '2': |
| 280 | if (*flags & XT_SCTP_DEST_PORTS) |
| 281 | exit_error(PARAMETER_PROBLEM, |
| 282 | "Only one `--destination-port' allowed"); |
| 283 | einfo->flags |= XT_SCTP_DEST_PORTS; |
| 284 | check_inverse(optarg, &invert, &optind, 0); |
| 285 | parse_sctp_ports(argv[optind-1], einfo->dpts); |
| 286 | if (invert) |
| 287 | einfo->invflags |= XT_SCTP_DEST_PORTS; |
| 288 | *flags |= XT_SCTP_DEST_PORTS; |
| 289 | break; |
| 290 | |
| 291 | case '3': |
| 292 | if (*flags & XT_SCTP_CHUNK_TYPES) |
| 293 | exit_error(PARAMETER_PROBLEM, |
| 294 | "Only one `--chunk-types' allowed"); |
| 295 | check_inverse(optarg, &invert, &optind, 0); |
| 296 | |
| 297 | if (!argv[optind] |
| 298 | || argv[optind][0] == '-' || argv[optind][0] == '!') |
| 299 | exit_error(PARAMETER_PROBLEM, |
| 300 | "--chunk-types requires two args"); |
| 301 | |
| 302 | einfo->flags |= XT_SCTP_CHUNK_TYPES; |
| 303 | parse_sctp_chunks(einfo, argv[optind-1], argv[optind]); |
| 304 | if (invert) |
| 305 | einfo->invflags |= XT_SCTP_CHUNK_TYPES; |
| 306 | optind++; |
| 307 | *flags |= XT_SCTP_CHUNK_TYPES; |
| 308 | break; |
| 309 | |
| 310 | default: |
| 311 | return 0; |
| 312 | } |
| 313 | return 1; |
| 314 | } |
| 315 | |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 316 | static char * |
| 317 | port_to_service(int port) |
| 318 | { |
| 319 | struct servent *service; |
| 320 | |
| 321 | if ((service = getservbyport(htons(port), "sctp"))) |
| 322 | return service->s_name; |
| 323 | |
| 324 | return NULL; |
| 325 | } |
| 326 | |
| 327 | static void |
| 328 | print_port(u_int16_t port, int numeric) |
| 329 | { |
| 330 | char *service; |
| 331 | |
| 332 | if (numeric || (service = port_to_service(port)) == NULL) |
| 333 | printf("%u", port); |
| 334 | else |
| 335 | printf("%s", service); |
| 336 | } |
| 337 | |
| 338 | static void |
| 339 | print_ports(const char *name, u_int16_t min, u_int16_t max, |
| 340 | int invert, int numeric) |
| 341 | { |
| 342 | const char *inv = invert ? "!" : ""; |
| 343 | |
| 344 | if (min != 0 || max != 0xFFFF || invert) { |
| 345 | printf("%s", name); |
| 346 | if (min == max) { |
| 347 | printf(":%s", inv); |
| 348 | print_port(min, numeric); |
| 349 | } else { |
| 350 | printf("s:%s", inv); |
| 351 | print_port(min, numeric); |
| 352 | printf(":"); |
| 353 | print_port(max, numeric); |
| 354 | } |
| 355 | printf(" "); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | static void |
| 360 | print_chunk_flags(u_int32_t chunknum, u_int8_t chunk_flags, u_int8_t chunk_flags_mask) |
| 361 | { |
| 362 | int i; |
| 363 | |
| 364 | DEBUGP("type: %d\tflags: %x\tflag mask: %x\n", chunknum, chunk_flags, |
| 365 | chunk_flags_mask); |
| 366 | |
| 367 | if (chunk_flags_mask) { |
| 368 | printf(":"); |
| 369 | } |
| 370 | |
| 371 | for (i = 7; i >= 0; i--) { |
| 372 | if (chunk_flags_mask & (1 << i)) { |
| 373 | if (chunk_flags & (1 << i)) { |
| 374 | printf("%c", sctp_chunk_names[chunknum].valid_flags[7-i]); |
| 375 | } else { |
| 376 | printf("%c", tolower(sctp_chunk_names[chunknum].valid_flags[7-i])); |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | static void |
| 383 | print_chunk(u_int32_t chunknum, int numeric) |
| 384 | { |
| 385 | if (numeric) { |
| 386 | printf("0x%04X", chunknum); |
| 387 | } |
| 388 | else { |
| 389 | int i; |
| 390 | |
| 391 | for (i = 0; i < ELEMCOUNT(sctp_chunk_names); i++) { |
| 392 | if (sctp_chunk_names[i].chunk_type == chunknum) |
| 393 | printf("%s", sctp_chunk_names[chunknum].name); |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | static void |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 399 | print_chunks(const struct xt_sctp_info *einfo, int numeric) |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 400 | { |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 401 | u_int32_t chunk_match_type = einfo->chunk_match_type; |
| 402 | const struct xt_sctp_flag_info *flag_info = einfo->flag_info; |
| 403 | int flag_count = einfo->flag_count; |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 404 | int i, j; |
| 405 | int flag; |
| 406 | |
| 407 | switch (chunk_match_type) { |
| 408 | case SCTP_CHUNK_MATCH_ANY: printf("any "); break; |
| 409 | case SCTP_CHUNK_MATCH_ALL: printf("all "); break; |
| 410 | case SCTP_CHUNK_MATCH_ONLY: printf("only "); break; |
| 411 | default: printf("Never reach herer\n"); break; |
| 412 | } |
| 413 | |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 414 | if (SCTP_CHUNKMAP_IS_CLEAR(einfo->chunkmap)) { |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 415 | printf("NONE "); |
| 416 | goto out; |
| 417 | } |
| 418 | |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 419 | if (SCTP_CHUNKMAP_IS_ALL_SET(einfo->chunkmap)) { |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 420 | printf("ALL "); |
| 421 | goto out; |
| 422 | } |
| 423 | |
| 424 | flag = 0; |
| 425 | for (i = 0; i < 256; i++) { |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 426 | if (SCTP_CHUNKMAP_IS_SET(einfo->chunkmap, i)) { |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 427 | if (flag) |
| 428 | printf(","); |
| 429 | flag = 1; |
| 430 | print_chunk(i, numeric); |
| 431 | for (j = 0; j < flag_count; j++) { |
| 432 | if (flag_info[j].chunktype == i) { |
| 433 | print_chunk_flags(i, flag_info[j].flag, |
| 434 | flag_info[j].flag_mask); |
| 435 | } |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | if (flag) |
| 441 | printf(" "); |
| 442 | out: |
| 443 | return; |
| 444 | } |
| 445 | |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 446 | static void |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 447 | sctp_print(const void *ip, const struct xt_entry_match *match, int numeric) |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 448 | { |
| 449 | const struct xt_sctp_info *einfo = |
| 450 | (const struct xt_sctp_info *)match->data; |
| 451 | |
| 452 | printf("sctp "); |
| 453 | |
| 454 | if (einfo->flags & XT_SCTP_SRC_PORTS) { |
| 455 | print_ports("spt", einfo->spts[0], einfo->spts[1], |
| 456 | einfo->invflags & XT_SCTP_SRC_PORTS, |
| 457 | numeric); |
| 458 | } |
| 459 | |
| 460 | if (einfo->flags & XT_SCTP_DEST_PORTS) { |
| 461 | print_ports("dpt", einfo->dpts[0], einfo->dpts[1], |
| 462 | einfo->invflags & XT_SCTP_DEST_PORTS, |
| 463 | numeric); |
| 464 | } |
| 465 | |
| 466 | if (einfo->flags & XT_SCTP_CHUNK_TYPES) { |
| 467 | /* FIXME: print_chunks() is used in save() where the printing of '!' |
| 468 | s taken care of, so we need to do that here as well */ |
| 469 | if (einfo->invflags & XT_SCTP_CHUNK_TYPES) { |
| 470 | printf("! "); |
| 471 | } |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 472 | print_chunks(einfo, numeric); |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 473 | } |
| 474 | } |
| 475 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 476 | static void sctp_save(const void *ip, const struct xt_entry_match *match) |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 477 | { |
| 478 | const struct xt_sctp_info *einfo = |
| 479 | (const struct xt_sctp_info *)match->data; |
| 480 | |
| 481 | if (einfo->flags & XT_SCTP_SRC_PORTS) { |
| 482 | if (einfo->invflags & XT_SCTP_SRC_PORTS) |
| 483 | printf("! "); |
| 484 | if (einfo->spts[0] != einfo->spts[1]) |
| 485 | printf("--sport %u:%u ", |
| 486 | einfo->spts[0], einfo->spts[1]); |
| 487 | else |
| 488 | printf("--sport %u ", einfo->spts[0]); |
| 489 | } |
| 490 | |
| 491 | if (einfo->flags & XT_SCTP_DEST_PORTS) { |
| 492 | if (einfo->invflags & XT_SCTP_DEST_PORTS) |
| 493 | printf("! "); |
| 494 | if (einfo->dpts[0] != einfo->dpts[1]) |
| 495 | printf("--dport %u:%u ", |
| 496 | einfo->dpts[0], einfo->dpts[1]); |
| 497 | else |
| 498 | printf("--dport %u ", einfo->dpts[0]); |
| 499 | } |
| 500 | |
| 501 | if (einfo->flags & XT_SCTP_CHUNK_TYPES) { |
| 502 | if (einfo->invflags & XT_SCTP_CHUNK_TYPES) |
| 503 | printf("! "); |
| 504 | printf("--chunk-types "); |
| 505 | |
Li Zefan | 1f25b40 | 2007-10-18 09:12:49 +0000 | [diff] [blame] | 506 | print_chunks(einfo, 0); |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 507 | } |
| 508 | } |
| 509 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 510 | static struct xtables_match sctp_match = { |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 511 | .name = "sctp", |
| 512 | .family = AF_INET, |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 513 | .version = XTABLES_VERSION, |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 514 | .size = XT_ALIGN(sizeof(struct xt_sctp_info)), |
| 515 | .userspacesize = XT_ALIGN(sizeof(struct xt_sctp_info)), |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 516 | .help = sctp_help, |
| 517 | .init = sctp_init, |
| 518 | .parse = sctp_parse, |
| 519 | .print = sctp_print, |
| 520 | .save = sctp_save, |
| 521 | .extra_opts = sctp_opts, |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 522 | }; |
| 523 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 524 | static struct xtables_match sctp_match6 = { |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 525 | .name = "sctp", |
| 526 | .family = AF_INET6, |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 527 | .version = XTABLES_VERSION, |
Yasuyuki KOZAKAI | 19f2950 | 2007-07-24 07:02:26 +0000 | [diff] [blame] | 528 | .size = XT_ALIGN(sizeof(struct xt_sctp_info)), |
| 529 | .userspacesize = XT_ALIGN(sizeof(struct xt_sctp_info)), |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 530 | .help = sctp_help, |
| 531 | .init = sctp_init, |
| 532 | .parse = sctp_parse, |
| 533 | .print = sctp_print, |
| 534 | .save = sctp_save, |
| 535 | .extra_opts = sctp_opts, |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 536 | }; |
| 537 | |
| 538 | void _init(void) |
| 539 | { |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 540 | xtables_register_match(&sctp_match); |
| 541 | xtables_register_match(&sctp_match6); |
Patrick McHardy | 3810013 | 2006-11-13 19:38:44 +0000 | [diff] [blame] | 542 | } |