Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 1 | /* Code to convert iptables-save format to xml format, |
| 2 | * (C) 2006 Ufo Mechanic <azez@ufomechanic.net> |
| 3 | * based on iptables-restor (C) 2000-2002 by Harald Welte <laforge@gnumonks.org> |
| 4 | * based on previous code from Rusty Russell <rusty@linuxcare.com.au> |
| 5 | * |
| 6 | * This code is distributed under the terms of GNU GPL v2 |
| 7 | * |
| 8 | * $Id: iptables-xml.c,v 1.4 2006/11/09 12:02:17 azez Exp $ |
| 9 | */ |
| 10 | |
| 11 | #include <getopt.h> |
| 12 | #include <sys/errno.h> |
| 13 | #include <string.h> |
| 14 | #include <stdio.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <stdarg.h> |
| 17 | #include "iptables.h" |
| 18 | #include "libiptc/libiptc.h" |
| 19 | |
| 20 | #ifdef DEBUG |
| 21 | #define DEBUGP(x, args...) fprintf(stderr, x, ## args) |
| 22 | #else |
| 23 | #define DEBUGP(x, args...) |
| 24 | #endif |
| 25 | |
| 26 | /* no need to link with iptables.o */ |
| 27 | const char *program_name; |
| 28 | const char *program_version; |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 29 | |
Lutz Jaenicke | e78c69c | 2006-12-09 13:06:04 +0000 | [diff] [blame] | 30 | #ifndef IPTABLES_MULTI |
| 31 | int line = 0; |
| 32 | void exit_error(enum exittype status, char *msg, ...) |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 33 | { |
| 34 | va_list args; |
| 35 | |
| 36 | va_start(args, msg); |
| 37 | fprintf(stderr, "%s v%s: ", program_name, program_version); |
| 38 | vfprintf(stderr, msg, args); |
| 39 | va_end(args); |
| 40 | fprintf(stderr, "\n"); |
| 41 | /* On error paths, make sure that we don't leak memory */ |
| 42 | exit(status); |
| 43 | } |
Lutz Jaenicke | e78c69c | 2006-12-09 13:06:04 +0000 | [diff] [blame] | 44 | #endif |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 45 | |
| 46 | static void print_usage(const char *name, const char *version) |
| 47 | __attribute__ ((noreturn)); |
| 48 | |
| 49 | static int verbose = 0; |
| 50 | /* Whether to combine actions of sequential rules with identical conditions */ |
| 51 | static int combine = 0; |
| 52 | /* Keeping track of external matches and targets. */ |
| 53 | static struct option options[] = { |
| 54 | {"verbose", 0, 0, 'v'}, |
| 55 | {"combine", 0, 0, 'c'}, |
| 56 | {"help", 0, 0, 'h'}, |
| 57 | {0} |
| 58 | }; |
| 59 | |
| 60 | static void |
| 61 | print_usage(const char *name, const char *version) |
| 62 | { |
| 63 | fprintf(stderr, "Usage: %s [-c] [-v] [-h]\n" |
| 64 | " [--combine ]\n" |
| 65 | " [ --verbose ]\n" " [ --help ]\n", name); |
| 66 | |
| 67 | exit(1); |
| 68 | } |
| 69 | |
Lutz Jaenicke | e78c69c | 2006-12-09 13:06:04 +0000 | [diff] [blame] | 70 | static int |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 71 | parse_counters(char *string, struct ipt_counters *ctr) |
| 72 | { |
| 73 | if (string != NULL) |
| 74 | return (sscanf |
| 75 | (string, "[%llu:%llu]", |
| 76 | (unsigned long long *) &ctr->pcnt, |
| 77 | (unsigned long long *) &ctr->bcnt) == 2); |
| 78 | else |
| 79 | return (0 == 2); |
| 80 | } |
| 81 | |
| 82 | /* global new argv and argc */ |
| 83 | static char *newargv[255]; |
| 84 | static int newargc = 0; |
| 85 | |
| 86 | static char *oldargv[255]; |
| 87 | static int oldargc = 0; |
| 88 | |
| 89 | /* arg meta data, were they quoted, frinstance */ |
| 90 | static int newargvattr[255]; |
| 91 | |
| 92 | #define IPT_CHAIN_MAXNAMELEN IPT_TABLE_MAXNAMELEN |
| 93 | char closeActionTag[IPT_TABLE_MAXNAMELEN + 1]; |
| 94 | char closeRuleTag[IPT_TABLE_MAXNAMELEN + 1]; |
| 95 | char curTable[IPT_TABLE_MAXNAMELEN + 1]; |
| 96 | char curChain[IPT_CHAIN_MAXNAMELEN + 1]; |
| 97 | |
| 98 | typedef struct chain |
| 99 | { |
| 100 | char *chain; |
| 101 | char *policy; |
| 102 | struct ipt_counters count; |
| 103 | int created; |
| 104 | } chain; |
| 105 | |
| 106 | #define maxChains 10240 /* max chains per table */ |
| 107 | static chain chains[maxChains]; |
| 108 | static int nextChain = 0; |
| 109 | |
| 110 | /* funCtion adding one argument to newargv, updating newargc |
| 111 | * returns true if argument added, false otherwise */ |
| 112 | static int |
| 113 | add_argv(char *what, int quoted) |
| 114 | { |
| 115 | DEBUGP("add_argv: %d %s\n", newargc, what); |
| 116 | if (what && ((newargc + 1) < sizeof(newargv) / sizeof(char *))) { |
| 117 | newargv[newargc] = strdup(what); |
| 118 | newargvattr[newargc] = quoted; |
| 119 | newargc++; |
| 120 | return 1; |
| 121 | } else |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static void |
| 126 | free_argv(void) |
| 127 | { |
| 128 | int i; |
| 129 | |
| 130 | for (i = 0; i < newargc; i++) { |
| 131 | free(newargv[i]); |
| 132 | newargv[i] = NULL; |
| 133 | } |
| 134 | newargc = 0; |
| 135 | |
| 136 | for (i = 0; i < oldargc; i++) { |
| 137 | free(oldargv[i]); |
| 138 | oldargv[i] = NULL; |
| 139 | } |
| 140 | oldargc = 0; |
| 141 | } |
| 142 | |
| 143 | /* save parsed rule for comparison with next rule |
| 144 | to perform action agregation on duplicate conditions */ |
| 145 | static void |
| 146 | save_argv(void) |
| 147 | { |
| 148 | int i; |
| 149 | |
| 150 | for (i = 0; i < oldargc; i++) |
| 151 | free(oldargv[i]); |
| 152 | oldargc = newargc; |
| 153 | newargc = 0; |
| 154 | for (i = 0; i < oldargc; i++) { |
| 155 | oldargv[i] = newargv[i]; |
| 156 | newargv[i] = NULL; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /* like puts but with xml encoding */ |
| 161 | static void |
| 162 | xmlEncode(char *text) |
| 163 | { |
| 164 | while (text && *text) { |
| 165 | if ((unsigned char) (*text) >= 127) |
| 166 | printf("&#%d;", (unsigned char) (*text)); |
| 167 | else if (*text == '&') |
| 168 | printf("&"); |
| 169 | else if (*text == '<') |
| 170 | printf("<"); |
| 171 | else if (*text == '>') |
| 172 | printf(">"); |
| 173 | else if (*text == '"') |
| 174 | printf("""); |
| 175 | else |
| 176 | putchar(*text); |
| 177 | text++; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /* Output text as a comment, avoiding a double hyphen */ |
| 182 | static void |
| 183 | xmlCommentEscape(char *comment) |
| 184 | { |
| 185 | int h_count = 0; |
| 186 | |
| 187 | while (comment && *comment) { |
| 188 | if (*comment == '-') { |
| 189 | h_count++; |
| 190 | if (h_count >= 2) { |
| 191 | h_count = 0; |
| 192 | putchar(' '); |
| 193 | } |
| 194 | putchar('*'); |
| 195 | } |
| 196 | /* strip trailing newline */ |
| 197 | if (*comment == '\n' && *(comment + 1) == 0); |
| 198 | else |
| 199 | putchar(*comment); |
| 200 | comment++; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | static void |
| 205 | xmlComment(char *comment) |
| 206 | { |
| 207 | printf("<!-- "); |
| 208 | xmlCommentEscape(comment); |
| 209 | printf(" -->\n"); |
| 210 | } |
| 211 | |
| 212 | static void |
| 213 | xmlAttrS(char *name, char *value) |
| 214 | { |
| 215 | printf("%s=\"", name); |
| 216 | xmlEncode(value); |
| 217 | printf("\" "); |
| 218 | } |
| 219 | |
| 220 | static void |
| 221 | xmlAttrI(char *name, long long int num) |
| 222 | { |
| 223 | printf("%s=\"%lld\" ", name, num); |
| 224 | } |
| 225 | |
| 226 | static void |
| 227 | closeChain() |
| 228 | { |
| 229 | if (curChain[0] == 0) |
| 230 | return; |
| 231 | |
| 232 | if (closeActionTag[0]) |
| 233 | printf("%s\n", closeActionTag); |
| 234 | closeActionTag[0] = 0; |
| 235 | if (closeRuleTag[0]) |
| 236 | printf("%s\n", closeRuleTag); |
| 237 | closeRuleTag[0] = 0; |
| 238 | if (curChain[0]) |
| 239 | printf(" </chain>\n"); |
| 240 | curChain[0] = 0; |
| 241 | //lastRule[0]=0; |
| 242 | } |
| 243 | |
| 244 | static void |
| 245 | openChain(char *chain, char *policy, struct ipt_counters *ctr, char close) |
| 246 | { |
| 247 | closeChain(); |
| 248 | |
| 249 | strncpy(curChain, chain, IPT_CHAIN_MAXNAMELEN); |
| 250 | curChain[IPT_CHAIN_MAXNAMELEN] = '\0'; |
| 251 | |
| 252 | printf(" <chain "); |
| 253 | xmlAttrS("name", curChain); |
| 254 | if (strcmp(policy, "-") != 0) |
| 255 | xmlAttrS("policy", policy); |
| 256 | xmlAttrI("packet-count", (unsigned long long) ctr->pcnt); |
| 257 | xmlAttrI("byte-count", (unsigned long long) ctr->bcnt); |
| 258 | if (close) { |
| 259 | printf("%c", close); |
| 260 | curChain[0] = 0; |
| 261 | } |
| 262 | printf(">\n"); |
| 263 | } |
| 264 | |
| 265 | static int |
| 266 | existsChain(char *chain) |
| 267 | { |
| 268 | /* open a saved chain */ |
| 269 | int c = 0; |
| 270 | |
| 271 | if (0 == strcmp(curChain, chain)) |
| 272 | return 1; |
| 273 | for (c = 0; c < nextChain; c++) |
| 274 | if (chains[c].chain && strcmp(chains[c].chain, chain) == 0) |
| 275 | return 1; |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static void |
| 280 | needChain(char *chain) |
| 281 | { |
| 282 | /* open a saved chain */ |
| 283 | int c = 0; |
| 284 | |
| 285 | if (0 == strcmp(curChain, chain)) |
| 286 | return; |
| 287 | |
| 288 | for (c = 0; c < nextChain; c++) |
| 289 | if (chains[c].chain && strcmp(chains[c].chain, chain) == 0) { |
| 290 | openChain(chains[c].chain, chains[c].policy, |
| 291 | &(chains[c].count), '\0'); |
| 292 | /* And, mark it as done so we don't create |
| 293 | an empty chain at table-end time */ |
| 294 | chains[c].created = 1; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | static void |
| 299 | saveChain(char *chain, char *policy, struct ipt_counters *ctr) |
| 300 | { |
| 301 | if (nextChain >= maxChains) { |
| 302 | exit_error(PARAMETER_PROBLEM, |
| 303 | "%s: line %u chain name invalid\n", |
| 304 | program_name, line); |
| 305 | exit(1); |
| 306 | }; |
| 307 | chains[nextChain].chain = strdup(chain); |
| 308 | chains[nextChain].policy = strdup(policy); |
| 309 | chains[nextChain].count = *ctr; |
| 310 | chains[nextChain].created = 0; |
| 311 | nextChain++; |
| 312 | } |
| 313 | |
| 314 | static void |
| 315 | finishChains() |
| 316 | { |
| 317 | int c; |
| 318 | |
| 319 | for (c = 0; c < nextChain; c++) |
| 320 | if (!chains[c].created) { |
| 321 | openChain(chains[c].chain, chains[c].policy, |
| 322 | &(chains[c].count), '/'); |
| 323 | free(chains[c].chain); |
| 324 | free(chains[c].policy); |
| 325 | } |
| 326 | nextChain = 0; |
| 327 | } |
| 328 | |
| 329 | static void |
| 330 | closeTable() |
| 331 | { |
| 332 | closeChain(); |
| 333 | finishChains(); |
| 334 | if (curTable[0]) |
| 335 | printf(" </table>\n"); |
| 336 | curTable[0] = 0; |
| 337 | } |
| 338 | |
| 339 | static void |
| 340 | openTable(char *table) |
| 341 | { |
| 342 | closeTable(); |
| 343 | |
| 344 | strncpy(curTable, table, IPT_TABLE_MAXNAMELEN); |
| 345 | curTable[IPT_TABLE_MAXNAMELEN] = '\0'; |
| 346 | |
| 347 | printf(" <table "); |
| 348 | xmlAttrS("name", curTable); |
| 349 | printf(">\n"); |
| 350 | } |
| 351 | |
| 352 | // is char* -j --jump -g or --goto |
| 353 | static int |
| 354 | isTarget(char *arg) |
| 355 | { |
| 356 | return ((arg) |
| 357 | && (strcmp((arg), "-j") == 0 || strcmp((arg), "--jump") == 0 |
| 358 | || strcmp((arg), "-g") == 0 |
| 359 | || strcmp((arg), "--goto") == 0)); |
| 360 | } |
| 361 | |
Sam Liddicott | 8e52815 | 2007-07-17 17:02:04 +0000 | [diff] [blame] | 362 | // is it a terminating target like -j ACCEPT, etc |
| 363 | // (or I guess -j SNAT in nat table, but we don't check for that yet |
| 364 | static int |
| 365 | isTerminatingTarget(char *arg) |
| 366 | { |
| 367 | return ((arg) |
| 368 | && (strcmp((arg), "ACCEPT") == 0 |
| 369 | || strcmp((arg), "DROP") == 0 |
| 370 | || strcmp((arg), "QUEUE") == 0 |
| 371 | || strcmp((arg), "RETURN") == 0)); |
| 372 | } |
| 373 | |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 374 | // part=-1 means do conditions, part=1 means do rules, part=0 means do both |
| 375 | static void |
| 376 | do_rule_part(char *leveltag1, char *leveltag2, int part, int argc, |
| 377 | char *argv[], int argvattr[]) |
| 378 | { |
| 379 | int arg = 1; // ignore leading -A |
| 380 | char invert_next = 0; |
| 381 | char *thisChain = NULL; |
| 382 | char *spacer = ""; // space when needed to assemble arguments |
| 383 | char *level1 = NULL; |
| 384 | char *level2 = NULL; |
| 385 | char *leveli1 = " "; |
| 386 | char *leveli2 = " "; |
| 387 | |
| 388 | #define CLOSE_LEVEL(LEVEL) \ |
| 389 | do { \ |
| 390 | if (level ## LEVEL) printf("</%s>\n", \ |
| 391 | (leveltag ## LEVEL)?(leveltag ## LEVEL):(level ## LEVEL)); \ |
| 392 | level ## LEVEL=NULL;\ |
| 393 | } while(0) |
| 394 | |
| 395 | #define OPEN_LEVEL(LEVEL,TAG) \ |
| 396 | do {\ |
| 397 | level ## LEVEL=TAG;\ |
| 398 | if (leveltag ## LEVEL) {\ |
| 399 | printf("%s<%s ", (leveli ## LEVEL), \ |
| 400 | (leveltag ## LEVEL));\ |
| 401 | xmlAttrS("type", (TAG)); \ |
| 402 | } else printf("%s<%s ", (leveli ## LEVEL), (level ## LEVEL)); \ |
| 403 | } while(0) |
| 404 | |
| 405 | thisChain = argv[arg++]; |
| 406 | |
| 407 | if (part == 1) { /* skip */ |
| 408 | /* use argvattr to tell which arguments were quoted |
| 409 | to avoid comparing quoted arguments, like comments, to -j, */ |
| 410 | while (arg < argc && (argvattr[arg] || !isTarget(argv[arg]))) |
| 411 | arg++; |
| 412 | } |
| 413 | |
| 414 | /* Before we start, if the first arg is -[^-] and not -m or -j or -g |
| 415 | then start a dummy <match> tag for old style built-in matches. |
| 416 | We would do this in any case, but no need if it would be empty */ |
| 417 | if (arg < argc && argv[arg][0] == '-' && !isTarget(argv[arg]) |
| 418 | && strcmp(argv[arg], "-m") != 0) { |
| 419 | OPEN_LEVEL(1, "match"); |
| 420 | printf(">\n"); |
| 421 | } |
| 422 | while (arg < argc) { |
| 423 | // If ! is followed by -* then apply to that else output as data |
| 424 | // Stop, if we need to |
| 425 | if (part == -1 && !argvattr[arg] && (isTarget(argv[arg]))) { |
| 426 | break; |
| 427 | } else if (!argvattr[arg] && strcmp(argv[arg], "!") == 0) { |
| 428 | if ((arg + 1) < argc && argv[arg + 1][0] == '-') |
| 429 | invert_next = '!'; |
| 430 | else |
| 431 | printf("%s%s", spacer, argv[arg]); |
| 432 | spacer = " "; |
| 433 | } else if (!argvattr[arg] && isTarget(argv[arg]) |
| 434 | && existsChain(argv[arg + 1]) |
| 435 | && (2 + arg >= argc)) { |
| 436 | if (!((1 + arg) < argc)) |
| 437 | // no args to -j, -m or -g, ignore & finish loop |
| 438 | break; |
| 439 | CLOSE_LEVEL(2); |
| 440 | if (level1) |
| 441 | printf("%s", leveli1); |
| 442 | CLOSE_LEVEL(1); |
| 443 | spacer = ""; |
| 444 | invert_next = 0; |
| 445 | if (strcmp(argv[arg], "-g") == 0 |
| 446 | || strcmp(argv[arg], "--goto") == 0) { |
| 447 | /* goto user chain */ |
| 448 | OPEN_LEVEL(1, "goto"); |
| 449 | printf(">\n"); |
| 450 | arg++; |
| 451 | OPEN_LEVEL(2, argv[arg]); |
| 452 | printf("/>\n"); |
| 453 | level2 = NULL; |
| 454 | } else { |
| 455 | /* call user chain */ |
| 456 | OPEN_LEVEL(1, "call"); |
| 457 | printf(">\n"); |
| 458 | arg++; |
| 459 | OPEN_LEVEL(2, argv[arg]); |
| 460 | printf("/>\n"); |
| 461 | level2 = NULL; |
| 462 | } |
| 463 | } else if (!argvattr[arg] |
| 464 | && (isTarget(argv[arg]) |
| 465 | || strcmp(argv[arg], "-m") == 0 |
| 466 | || strcmp(argv[arg], "--module") == 0)) { |
| 467 | if (!((1 + arg) < argc)) |
| 468 | // no args to -j, -m or -g, ignore & finish loop |
| 469 | break; |
| 470 | CLOSE_LEVEL(2); |
| 471 | if (level1) |
| 472 | printf("%s", leveli1); |
| 473 | CLOSE_LEVEL(1); |
| 474 | spacer = ""; |
| 475 | invert_next = 0; |
| 476 | arg++; |
| 477 | OPEN_LEVEL(1, (argv[arg])); |
| 478 | // Optimize case, can we close this tag already? |
| 479 | if ((arg + 1) >= argc || (!argvattr[arg + 1] |
| 480 | && (isTarget(argv[arg + 1]) |
| 481 | || strcmp(argv[arg + 1], |
| 482 | "-m") == 0 |
| 483 | || strcmp(argv[arg + 1], |
| 484 | "--module") == |
| 485 | 0))) { |
| 486 | printf(" />\n"); |
| 487 | level1 = NULL; |
| 488 | } else { |
| 489 | printf(">\n"); |
| 490 | } |
| 491 | } else if (!argvattr[arg] && argv[arg][0] == '-') { |
| 492 | char *tag; |
| 493 | CLOSE_LEVEL(2); |
| 494 | // Skip past any - |
| 495 | tag = argv[arg]; |
| 496 | while (*tag == '-' && *tag) |
| 497 | tag++; |
| 498 | |
| 499 | spacer = ""; |
| 500 | OPEN_LEVEL(2, tag); |
| 501 | if (invert_next) |
| 502 | printf(" invert=\"1\""); |
| 503 | invert_next = 0; |
| 504 | |
| 505 | // Optimize case, can we close this tag already? |
| 506 | if (!((arg + 1) < argc) |
| 507 | || (argv[arg + 1][0] == '-' /* NOT QUOTED */ )) { |
| 508 | printf(" />\n"); |
| 509 | level2 = NULL; |
| 510 | } else { |
| 511 | printf(">"); |
| 512 | } |
| 513 | } else { // regular data |
| 514 | char *spaces = strchr(argv[arg], ' '); |
| 515 | printf("%s", spacer); |
| 516 | if (spaces || argvattr[arg]) |
| 517 | printf("""); |
| 518 | // if argv[arg] contains a space, enclose in quotes |
| 519 | xmlEncode(argv[arg]); |
| 520 | if (spaces || argvattr[arg]) |
| 521 | printf("""); |
| 522 | spacer = " "; |
| 523 | } |
| 524 | arg++; |
| 525 | } |
| 526 | CLOSE_LEVEL(2); |
| 527 | if (level1) |
| 528 | printf("%s", leveli1); |
| 529 | CLOSE_LEVEL(1); |
| 530 | |
| 531 | return; |
| 532 | } |
| 533 | |
| 534 | static int |
| 535 | compareRules() |
| 536 | { |
| 537 | /* compare arguments up to -j or -g for match. |
| 538 | NOTE: We don't want to combine actions if there were no criteria |
| 539 | in each rule, or rules didn't have an action |
| 540 | NOTE: Depends on arguments being in some kind of "normal" order which |
| 541 | is the case when processing the ACTUAL output of actual iptables-save |
| 542 | rather than a file merely in a compatable format */ |
| 543 | |
| 544 | int old = 0; |
| 545 | int new = 0; |
| 546 | |
| 547 | int compare = 0; |
| 548 | |
| 549 | while (new < newargc && old < oldargc) { |
| 550 | if (isTarget(oldargv[old]) && isTarget(newargv[new])) { |
Sam Liddicott | 8e52815 | 2007-07-17 17:02:04 +0000 | [diff] [blame] | 551 | /* if oldarg was a terminating action then it makes no sense |
| 552 | * to combine further actions into the same xml */ |
| 553 | if (((strcmp((oldargv[old]), "-j") == 0 |
| 554 | || strcmp((oldargv[old]), "--jump") == 0) |
| 555 | && old+1 < oldargc |
| 556 | && isTerminatingTarget(oldargv[old+1]) ) |
| 557 | || strcmp((oldargv[old]), "-g") == 0 |
| 558 | || strcmp((oldargv[old]), "--goto") == 0 ) { |
| 559 | /* Previous rule had terminating action */ |
| 560 | compare = 0; |
| 561 | } else { |
| 562 | compare = 1; |
| 563 | } |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 564 | break; |
| 565 | } |
| 566 | // break when old!=new |
| 567 | if (strcmp(oldargv[old], newargv[new]) != 0) { |
| 568 | compare = 0; |
| 569 | break; |
| 570 | } |
| 571 | |
| 572 | old++; |
| 573 | new++; |
| 574 | } |
| 575 | // We won't match unless both rules had a target. |
| 576 | // This means we don't combine target-less rules, which is good |
| 577 | |
| 578 | return compare == 1; |
| 579 | } |
| 580 | |
| 581 | /* has a nice parsed rule starting with -A */ |
| 582 | static void |
| 583 | do_rule(char *pcnt, char *bcnt, int argc, char *argv[], int argvattr[]) |
| 584 | { |
| 585 | /* are these conditions the same as the previous rule? |
| 586 | * If so, skip arg straight to -j or -g */ |
| 587 | if (combine && argc > 2 && !isTarget(argv[2]) && compareRules()) { |
| 588 | xmlComment("Combine action from next rule"); |
| 589 | } else { |
| 590 | |
| 591 | if (closeActionTag[0]) { |
| 592 | printf("%s\n", closeActionTag); |
| 593 | closeActionTag[0] = 0; |
| 594 | } |
| 595 | if (closeRuleTag[0]) { |
| 596 | printf("%s\n", closeRuleTag); |
| 597 | closeRuleTag[0] = 0; |
| 598 | } |
| 599 | |
| 600 | printf(" <rule "); |
| 601 | //xmlAttrS("table",curTable); // not needed in full mode |
| 602 | //xmlAttrS("chain",argv[1]); // not needed in full mode |
| 603 | if (pcnt) |
| 604 | xmlAttrS("packet-count", pcnt); |
| 605 | if (bcnt) |
| 606 | xmlAttrS("byte-count", bcnt); |
| 607 | printf(">\n"); |
| 608 | |
| 609 | strncpy(closeRuleTag, " </rule>\n", IPT_TABLE_MAXNAMELEN); |
| 610 | closeRuleTag[IPT_TABLE_MAXNAMELEN] = '\0'; |
| 611 | |
| 612 | /* no point in writing out condition if there isn't one */ |
| 613 | if (argc >= 3 && !isTarget(argv[2])) { |
| 614 | printf(" <conditions>\n"); |
| 615 | do_rule_part(NULL, NULL, -1, argc, argv, argvattr); |
| 616 | printf(" </conditions>\n"); |
| 617 | } |
| 618 | } |
| 619 | /* Write out the action */ |
| 620 | //do_rule_part("action","arg",1,argc,argv,argvattr); |
| 621 | if (!closeActionTag[0]) { |
| 622 | printf(" <actions>\n"); |
| 623 | strncpy(closeActionTag, " </actions>\n", |
| 624 | IPT_TABLE_MAXNAMELEN); |
| 625 | closeActionTag[IPT_TABLE_MAXNAMELEN] = '\0'; |
| 626 | } |
| 627 | do_rule_part(NULL, NULL, 1, argc, argv, argvattr); |
| 628 | } |
| 629 | |
| 630 | |
| 631 | #ifdef IPTABLES_MULTI |
| 632 | int |
Lutz Jaenicke | e78c69c | 2006-12-09 13:06:04 +0000 | [diff] [blame] | 633 | iptables_xml_main(int argc, char *argv[]) |
Amin Azez | 8d3eccb | 2006-11-13 20:23:36 +0000 | [diff] [blame] | 634 | #else |
| 635 | int |
| 636 | main(int argc, char *argv[]) |
| 637 | #endif |
| 638 | { |
| 639 | char buffer[10240]; |
| 640 | int c; |
| 641 | FILE *in; |
| 642 | |
| 643 | program_name = "iptables-xml"; |
| 644 | program_version = IPTABLES_VERSION; |
| 645 | line = 0; |
| 646 | |
| 647 | while ((c = getopt_long(argc, argv, "cvh", options, NULL)) != -1) { |
| 648 | switch (c) { |
| 649 | case 'c': |
| 650 | combine = 1; |
| 651 | break; |
| 652 | case 'v': |
| 653 | printf("xptables-xml\n"); |
| 654 | verbose = 1; |
| 655 | break; |
| 656 | case 'h': |
| 657 | print_usage("iptables-xml", IPTABLES_VERSION); |
| 658 | break; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | if (optind == argc - 1) { |
| 663 | in = fopen(argv[optind], "r"); |
| 664 | if (!in) { |
| 665 | fprintf(stderr, "Can't open %s: %s", argv[optind], |
| 666 | strerror(errno)); |
| 667 | exit(1); |
| 668 | } |
| 669 | } else if (optind < argc) { |
| 670 | fprintf(stderr, "Unknown arguments found on commandline"); |
| 671 | exit(1); |
| 672 | } else |
| 673 | in = stdin; |
| 674 | |
| 675 | printf("<iptables-rules version=\"1.0\">\n"); |
| 676 | |
| 677 | /* Grab standard input. */ |
| 678 | while (fgets(buffer, sizeof(buffer), in)) { |
| 679 | int ret = 0; |
| 680 | |
| 681 | line++; |
| 682 | |
| 683 | if (buffer[0] == '\n') |
| 684 | continue; |
| 685 | else if (buffer[0] == '#') { |
| 686 | xmlComment(buffer); |
| 687 | continue; |
| 688 | } |
| 689 | |
| 690 | if (verbose) { |
| 691 | printf("<!-- line %d ", line); |
| 692 | xmlCommentEscape(buffer); |
| 693 | printf(" -->\n"); |
| 694 | } |
| 695 | |
| 696 | if ((strcmp(buffer, "COMMIT\n") == 0) && (curTable[0])) { |
| 697 | DEBUGP("Calling commit\n"); |
| 698 | closeTable(); |
| 699 | ret = 1; |
| 700 | } else if ((buffer[0] == '*')) { |
| 701 | /* New table */ |
| 702 | char *table; |
| 703 | |
| 704 | table = strtok(buffer + 1, " \t\n"); |
| 705 | DEBUGP("line %u, table '%s'\n", line, table); |
| 706 | if (!table) { |
| 707 | exit_error(PARAMETER_PROBLEM, |
| 708 | "%s: line %u table name invalid\n", |
| 709 | program_name, line); |
| 710 | exit(1); |
| 711 | } |
| 712 | openTable(table); |
| 713 | |
| 714 | ret = 1; |
| 715 | } else if ((buffer[0] == ':') && (curTable[0])) { |
| 716 | /* New chain. */ |
| 717 | char *policy, *chain; |
| 718 | struct ipt_counters count; |
| 719 | char *ctrs; |
| 720 | |
| 721 | chain = strtok(buffer + 1, " \t\n"); |
| 722 | DEBUGP("line %u, chain '%s'\n", line, chain); |
| 723 | if (!chain) { |
| 724 | exit_error(PARAMETER_PROBLEM, |
| 725 | "%s: line %u chain name invalid\n", |
| 726 | program_name, line); |
| 727 | exit(1); |
| 728 | } |
| 729 | |
| 730 | DEBUGP("Creating new chain '%s'\n", chain); |
| 731 | |
| 732 | policy = strtok(NULL, " \t\n"); |
| 733 | DEBUGP("line %u, policy '%s'\n", line, policy); |
| 734 | if (!policy) { |
| 735 | exit_error(PARAMETER_PROBLEM, |
| 736 | "%s: line %u policy invalid\n", |
| 737 | program_name, line); |
| 738 | exit(1); |
| 739 | } |
| 740 | |
| 741 | ctrs = strtok(NULL, " \t\n"); |
| 742 | parse_counters(ctrs, &count); |
| 743 | saveChain(chain, policy, &count); |
| 744 | |
| 745 | ret = 1; |
| 746 | } else if (curTable[0]) { |
| 747 | int a; |
| 748 | char *ptr = buffer; |
| 749 | char *pcnt = NULL; |
| 750 | char *bcnt = NULL; |
| 751 | char *parsestart; |
| 752 | char *chain = NULL; |
| 753 | |
| 754 | /* the parser */ |
| 755 | char *param_start, *curchar; |
| 756 | int quote_open, quoted; |
| 757 | |
| 758 | /* reset the newargv */ |
| 759 | newargc = 0; |
| 760 | |
| 761 | if (buffer[0] == '[') { |
| 762 | /* we have counters in our input */ |
| 763 | ptr = strchr(buffer, ']'); |
| 764 | if (!ptr) |
| 765 | exit_error(PARAMETER_PROBLEM, |
| 766 | "Bad line %u: need ]\n", |
| 767 | line); |
| 768 | |
| 769 | pcnt = strtok(buffer + 1, ":"); |
| 770 | if (!pcnt) |
| 771 | exit_error(PARAMETER_PROBLEM, |
| 772 | "Bad line %u: need :\n", |
| 773 | line); |
| 774 | |
| 775 | bcnt = strtok(NULL, "]"); |
| 776 | if (!bcnt) |
| 777 | exit_error(PARAMETER_PROBLEM, |
| 778 | "Bad line %u: need ]\n", |
| 779 | line); |
| 780 | |
| 781 | /* start command parsing after counter */ |
| 782 | parsestart = ptr + 1; |
| 783 | } else { |
| 784 | /* start command parsing at start of line */ |
| 785 | parsestart = buffer; |
| 786 | } |
| 787 | |
| 788 | |
| 789 | /* This is a 'real' parser crafted in artist mode |
| 790 | * not hacker mode. If the author can live with that |
| 791 | * then so can everyone else */ |
| 792 | |
| 793 | quote_open = 0; |
| 794 | /* We need to know which args were quoted so we |
| 795 | can preserve quote */ |
| 796 | quoted = 0; |
| 797 | param_start = parsestart; |
| 798 | |
| 799 | for (curchar = parsestart; *curchar; curchar++) { |
| 800 | if (*curchar == '"') { |
| 801 | /* quote_open cannot be true if there |
| 802 | * was no previous character. Thus, |
| 803 | * curchar-1 has to be within bounds */ |
| 804 | if (quote_open && |
| 805 | *(curchar - 1) != '\\') { |
| 806 | quote_open = 0; |
| 807 | *curchar = ' '; |
| 808 | } else { |
| 809 | quote_open = 1; |
| 810 | quoted = 1; |
| 811 | param_start++; |
| 812 | } |
| 813 | } |
| 814 | if (*curchar == ' ' |
| 815 | || *curchar == '\t' || *curchar == '\n') { |
| 816 | char param_buffer[1024]; |
| 817 | int param_len = curchar - param_start; |
| 818 | |
| 819 | if (quote_open) |
| 820 | continue; |
| 821 | |
| 822 | if (!param_len) { |
| 823 | /* two spaces? */ |
| 824 | param_start++; |
| 825 | continue; |
| 826 | } |
| 827 | |
| 828 | /* end of one parameter */ |
| 829 | strncpy(param_buffer, param_start, |
| 830 | param_len); |
| 831 | *(param_buffer + param_len) = '\0'; |
| 832 | |
| 833 | /* check if table name specified */ |
| 834 | if (!strncmp(param_buffer, "-t", 3) |
| 835 | || !strncmp(param_buffer, |
| 836 | "--table", 8)) { |
| 837 | exit_error(PARAMETER_PROBLEM, |
| 838 | "Line %u seems to have a " |
| 839 | "-t table option.\n", |
| 840 | line); |
| 841 | exit(1); |
| 842 | } |
| 843 | |
| 844 | add_argv(param_buffer, quoted); |
| 845 | if (newargc >= 2 |
| 846 | && 0 == |
| 847 | strcmp(newargv[newargc - 2], "-A")) |
| 848 | chain = newargv[newargc - 1]; |
| 849 | quoted = 0; |
| 850 | param_start += param_len + 1; |
| 851 | } else { |
| 852 | /* regular character, skip */ |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | DEBUGP("calling do_command(%u, argv, &%s, handle):\n", |
| 857 | newargc, curTable); |
| 858 | |
| 859 | for (a = 0; a < newargc; a++) |
| 860 | DEBUGP("argv[%u]: %s\n", a, newargv[a]); |
| 861 | |
| 862 | needChain(chain);// Should we explicitly look for -A |
| 863 | do_rule(pcnt, bcnt, newargc, newargv, newargvattr); |
| 864 | |
| 865 | save_argv(); |
| 866 | ret = 1; |
| 867 | } |
| 868 | if (!ret) { |
| 869 | fprintf(stderr, "%s: line %u failed\n", |
| 870 | program_name, line); |
| 871 | exit(1); |
| 872 | } |
| 873 | } |
| 874 | if (curTable[0]) { |
| 875 | fprintf(stderr, "%s: COMMIT expected at line %u\n", |
| 876 | program_name, line + 1); |
| 877 | exit(1); |
| 878 | } |
| 879 | |
| 880 | printf("</iptables-rules>\n"); |
| 881 | free_argv(); |
| 882 | |
| 883 | return 0; |
| 884 | } |