1 /* 2 * Copyright (c) 2014 Yandex LLC 3 * Copyright (c) 2014 Alexander V. Chernikov 4 * 5 * Redistribution and use in source forms, with and without modification, 6 * are permitted provided that this entire comment appears intact. 7 * 8 * Redistribution in binary form may occur without any restrictions. 9 * Obviously, it would be nice if you gave credit where credit is due 10 * but requiring it would be too onerous. 11 * 12 * This software is provided ``AS IS'' without any warranties of any kind. 13 * 14 * in-kernel ipfw tables support. 15 * 16 * $FreeBSD$ 17 */ 18 19 20 #include <sys/types.h> 21 #include <sys/param.h> 22 #include <sys/socket.h> 23 #include <sys/sysctl.h> 24 25 #include <ctype.h> 26 #include <err.h> 27 #include <errno.h> 28 #include <netdb.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <sysexits.h> 33 34 #include <net/if.h> 35 #include <netinet/in.h> 36 #include <netinet/ip_fw.h> 37 #include <arpa/inet.h> 38 #include <netdb.h> 39 40 #include "ipfw2.h" 41 42 static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[], 43 int add, int quiet, int update, int atomic); 44 static int table_flush(ipfw_obj_header *oh); 45 static int table_destroy(ipfw_obj_header *oh); 46 static int table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i); 47 static int table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i); 48 static int table_do_swap(ipfw_obj_header *oh, char *second); 49 static void table_create(ipfw_obj_header *oh, int ac, char *av[]); 50 static void table_modify(ipfw_obj_header *oh, int ac, char *av[]); 51 static void table_lookup(ipfw_obj_header *oh, int ac, char *av[]); 52 static void table_lock(ipfw_obj_header *oh, int lock); 53 static int table_swap(ipfw_obj_header *oh, char *second); 54 static int table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i); 55 static int table_show_info(ipfw_xtable_info *i, void *arg); 56 static void table_fill_ntlv(ipfw_obj_ntlv *ntlv, char *name, uint32_t set, 57 uint16_t uidx); 58 59 static int table_flush_one(ipfw_xtable_info *i, void *arg); 60 static int table_show_one(ipfw_xtable_info *i, void *arg); 61 static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh); 62 static void table_show_list(ipfw_obj_header *oh, int need_header); 63 static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent); 64 65 static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, 66 char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi); 67 static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, 68 char *arg, uint8_t type, uint32_t vmask); 69 static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, 70 uint32_t vmask, int print_ip); 71 72 typedef int (table_cb_t)(ipfw_xtable_info *i, void *arg); 73 static int tables_foreach(table_cb_t *f, void *arg, int sort); 74 75 #ifndef s6_addr32 76 #define s6_addr32 __u6_addr.__u6_addr32 77 #endif 78 79 static struct _s_x tabletypes[] = { 80 { "addr", IPFW_TABLE_ADDR }, 81 { "iface", IPFW_TABLE_INTERFACE }, 82 { "number", IPFW_TABLE_NUMBER }, 83 { "flow", IPFW_TABLE_FLOW }, 84 { NULL, 0 } 85 }; 86 87 static struct _s_x tablevaltypes[] = { 88 { "skipto", IPFW_VTYPE_SKIPTO }, 89 { "pipe", IPFW_VTYPE_PIPE }, 90 { "fib", IPFW_VTYPE_FIB }, 91 { "nat", IPFW_VTYPE_NAT }, 92 { "dscp", IPFW_VTYPE_DSCP }, 93 { "tag", IPFW_VTYPE_TAG }, 94 { "divert", IPFW_VTYPE_DIVERT }, 95 { "netgraph", IPFW_VTYPE_NETGRAPH }, 96 { "limit", IPFW_VTYPE_LIMIT }, 97 { "ipv4", IPFW_VTYPE_NH4 }, 98 { "ipv6", IPFW_VTYPE_NH6 }, 99 { NULL, 0 } 100 }; 101 102 static struct _s_x tablecmds[] = { 103 { "add", TOK_ADD }, 104 { "delete", TOK_DEL }, 105 { "create", TOK_CREATE }, 106 { "destroy", TOK_DESTROY }, 107 { "flush", TOK_FLUSH }, 108 { "modify", TOK_MODIFY }, 109 { "swap", TOK_SWAP }, 110 { "info", TOK_INFO }, 111 { "detail", TOK_DETAIL }, 112 { "list", TOK_LIST }, 113 { "lookup", TOK_LOOKUP }, 114 { "atomic", TOK_ATOMIC }, 115 { "lock", TOK_LOCK }, 116 { "unlock", TOK_UNLOCK }, 117 { NULL, 0 } 118 }; 119 120 static int 121 lookup_host (char *host, struct in_addr *ipaddr) 122 { 123 struct hostent *he; 124 125 if (!inet_aton(host, ipaddr)) { 126 if ((he = gethostbyname(host)) == NULL) 127 return(-1); 128 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 129 } 130 return(0); 131 } 132 133 static int 134 get_token(struct _s_x *table, char *string, char *errbase) 135 { 136 int tcmd; 137 138 if ((tcmd = match_token_relaxed(table, string)) < 0) 139 errx(EX_USAGE, "%s %s %s", 140 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 141 142 return (tcmd); 143 } 144 145 /* 146 * This one handles all table-related commands 147 * ipfw table NAME create ... 148 * ipfw table NAME modify ... 149 * ipfw table NAME destroy 150 * ipfw table NAME swap NAME 151 * ipfw table NAME lock 152 * ipfw table NAME unlock 153 * ipfw table NAME add addr[/masklen] [value] 154 * ipfw table NAME add [addr[/masklen] value] [addr[/masklen] value] .. 155 * ipfw table NAME delete addr[/masklen] [addr[/masklen]] .. 156 * ipfw table NAME lookup addr 157 * ipfw table {NAME | all} flush 158 * ipfw table {NAME | all} list 159 * ipfw table {NAME | all} info 160 * ipfw table {NAME | all} detail 161 */ 162 void 163 ipfw_table_handler(int ac, char *av[]) 164 { 165 int do_add, is_all; 166 int atomic, error, tcmd; 167 ipfw_xtable_info i; 168 ipfw_obj_header oh; 169 char *tablename; 170 uint32_t set; 171 void *arg; 172 173 memset(&oh, 0, sizeof(oh)); 174 is_all = 0; 175 if (co.use_set != 0) 176 set = co.use_set - 1; 177 else 178 set = 0; 179 180 ac--; av++; 181 NEED1("table needs name"); 182 tablename = *av; 183 184 if (table_check_name(tablename) == 0) { 185 table_fill_ntlv(&oh.ntlv, *av, set, 1); 186 oh.idx = 1; 187 } else { 188 if (strcmp(tablename, "all") == 0) 189 is_all = 1; 190 else 191 errx(EX_USAGE, "table name %s is invalid", tablename); 192 } 193 ac--; av++; 194 NEED1("table needs command"); 195 196 tcmd = get_token(tablecmds, *av, "table command"); 197 /* Check if atomic operation was requested */ 198 atomic = 0; 199 if (tcmd == TOK_ATOMIC) { 200 ac--; av++; 201 NEED1("atomic needs command"); 202 tcmd = get_token(tablecmds, *av, "table command"); 203 switch (tcmd) { 204 case TOK_ADD: 205 break; 206 default: 207 errx(EX_USAGE, "atomic is not compatible with %s", *av); 208 } 209 atomic = 1; 210 } 211 212 switch (tcmd) { 213 case TOK_LIST: 214 case TOK_INFO: 215 case TOK_DETAIL: 216 case TOK_FLUSH: 217 break; 218 default: 219 if (is_all != 0) 220 errx(EX_USAGE, "table name required"); 221 } 222 223 switch (tcmd) { 224 case TOK_ADD: 225 case TOK_DEL: 226 do_add = **av == 'a'; 227 ac--; av++; 228 table_modify_record(&oh, ac, av, do_add, co.do_quiet, 229 co.do_quiet, atomic); 230 break; 231 case TOK_CREATE: 232 ac--; av++; 233 table_create(&oh, ac, av); 234 break; 235 case TOK_MODIFY: 236 ac--; av++; 237 table_modify(&oh, ac, av); 238 break; 239 case TOK_DESTROY: 240 if (table_destroy(&oh) != 0) 241 err(EX_OSERR, "failed to destroy table %s", tablename); 242 break; 243 case TOK_FLUSH: 244 if (is_all == 0) { 245 if ((error = table_flush(&oh)) != 0) 246 err(EX_OSERR, "failed to flush table %s info", 247 tablename); 248 } else { 249 error = tables_foreach(table_flush_one, &oh, 1); 250 if (error != 0) 251 err(EX_OSERR, "failed to flush tables list"); 252 } 253 break; 254 case TOK_SWAP: 255 ac--; av++; 256 NEED1("second table name required"); 257 table_swap(&oh, *av); 258 break; 259 case TOK_LOCK: 260 case TOK_UNLOCK: 261 table_lock(&oh, (tcmd == TOK_LOCK)); 262 break; 263 case TOK_DETAIL: 264 case TOK_INFO: 265 arg = (tcmd == TOK_DETAIL) ? (void *)1 : NULL; 266 if (is_all == 0) { 267 if ((error = table_get_info(&oh, &i)) != 0) 268 err(EX_OSERR, "failed to request table info"); 269 table_show_info(&i, arg); 270 } else { 271 error = tables_foreach(table_show_info, arg, 1); 272 if (error != 0) 273 err(EX_OSERR, "failed to request tables list"); 274 } 275 break; 276 case TOK_LIST: 277 if (is_all == 0) { 278 ipfw_xtable_info i; 279 if ((error = table_get_info(&oh, &i)) != 0) 280 err(EX_OSERR, "failed to request table info"); 281 table_show_one(&i, NULL); 282 } else { 283 error = tables_foreach(table_show_one, NULL, 1); 284 if (error != 0) 285 err(EX_OSERR, "failed to request tables list"); 286 } 287 break; 288 case TOK_LOOKUP: 289 ac--; av++; 290 table_lookup(&oh, ac, av); 291 break; 292 } 293 } 294 295 static void 296 table_fill_ntlv(ipfw_obj_ntlv *ntlv, char *name, uint32_t set, uint16_t uidx) 297 { 298 299 ntlv->head.type = IPFW_TLV_TBL_NAME; 300 ntlv->head.length = sizeof(ipfw_obj_ntlv); 301 ntlv->idx = uidx; 302 ntlv->set = set; 303 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 304 } 305 306 static void 307 table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i) 308 { 309 310 oh->idx = 1; 311 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 312 } 313 314 static struct _s_x tablenewcmds[] = { 315 { "type", TOK_TYPE }, 316 { "valtype", TOK_VALTYPE }, 317 { "algo", TOK_ALGO }, 318 { "limit", TOK_LIMIT }, 319 { "locked", TOK_LOCK }, 320 { NULL, 0 } 321 }; 322 323 static struct _s_x flowtypecmds[] = { 324 { "src-ip", IPFW_TFFLAG_SRCIP }, 325 { "proto", IPFW_TFFLAG_PROTO }, 326 { "src-port", IPFW_TFFLAG_SRCPORT }, 327 { "dst-ip", IPFW_TFFLAG_DSTIP }, 328 { "dst-port", IPFW_TFFLAG_DSTPORT }, 329 { NULL, 0 } 330 }; 331 332 int 333 table_parse_type(uint8_t ttype, char *p, uint8_t *tflags) 334 { 335 uint32_t fset, fclear; 336 char *e; 337 338 /* Parse type options */ 339 switch(ttype) { 340 case IPFW_TABLE_FLOW: 341 fset = fclear = 0; 342 if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0) 343 errx(EX_USAGE, 344 "unable to parse flow option %s", e); 345 *tflags = fset; 346 break; 347 default: 348 return (EX_USAGE); 349 } 350 351 return (0); 352 } 353 354 void 355 table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags) 356 { 357 const char *tname; 358 int l; 359 360 if ((tname = match_value(tabletypes, type)) == NULL) 361 tname = "unknown"; 362 363 l = snprintf(tbuf, size, "%s", tname); 364 tbuf += l; 365 size -= l; 366 367 switch(type) { 368 case IPFW_TABLE_FLOW: 369 if (tflags != 0) { 370 *tbuf++ = ':'; 371 l--; 372 print_flags_buffer(tbuf, size, flowtypecmds, tflags); 373 } 374 break; 375 } 376 } 377 378 /* 379 * Creates new table 380 * 381 * ipfw table NAME create [ type { addr | iface | number | flow } ] 382 * [ algo algoname ] 383 */ 384 static void 385 table_create(ipfw_obj_header *oh, int ac, char *av[]) 386 { 387 ipfw_xtable_info xi; 388 int error, tcmd, val; 389 uint32_t fset, fclear; 390 size_t sz; 391 char *e, *p; 392 char tbuf[128]; 393 394 sz = sizeof(tbuf); 395 memset(&xi, 0, sizeof(xi)); 396 397 while (ac > 0) { 398 tcmd = get_token(tablenewcmds, *av, "option"); 399 ac--; av++; 400 401 switch (tcmd) { 402 case TOK_LIMIT: 403 NEED1("limit value required"); 404 xi.limit = strtol(*av, NULL, 10); 405 ac--; av++; 406 break; 407 case TOK_TYPE: 408 NEED1("table type required"); 409 /* Type may have suboptions after ':' */ 410 if ((p = strchr(*av, ':')) != NULL) 411 *p++ = '\0'; 412 val = match_token(tabletypes, *av); 413 if (val == -1) { 414 concat_tokens(tbuf, sizeof(tbuf), tabletypes, 415 ", "); 416 errx(EX_USAGE, 417 "Unknown tabletype: %s. Supported: %s", 418 *av, tbuf); 419 } 420 xi.type = val; 421 if (p != NULL) { 422 error = table_parse_type(val, p, &xi.tflags); 423 if (error != 0) 424 errx(EX_USAGE, 425 "Unsupported suboptions: %s", p); 426 } 427 ac--; av++; 428 break; 429 case TOK_VALTYPE: 430 NEED1("table value type required"); 431 fset = fclear = 0; 432 val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear); 433 if (val != -1) { 434 xi.vmask = fset; 435 ac--; av++; 436 break; 437 } 438 concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", "); 439 errx(EX_USAGE, "Unknown value type: %s. Supported: %s", 440 e, tbuf); 441 break; 442 case TOK_ALGO: 443 NEED1("table algorithm name required"); 444 if (strlen(*av) > sizeof(xi.algoname)) 445 errx(EX_USAGE, "algorithm name too long"); 446 strlcpy(xi.algoname, *av, sizeof(xi.algoname)); 447 ac--; av++; 448 break; 449 case TOK_LOCK: 450 xi.flags |= IPFW_TGFLAGS_LOCKED; 451 break; 452 } 453 } 454 455 /* Set some defaults to preserve compability */ 456 if (xi.algoname[0] == '\0' && xi.type == 0) 457 xi.type = IPFW_TABLE_ADDR; 458 if (xi.vmask == 0) 459 xi.vmask = IPFW_VTYPE_LEGACY; 460 461 if ((error = table_do_create(oh, &xi)) != 0) 462 err(EX_OSERR, "Table creation failed"); 463 } 464 465 /* 466 * Creates new table 467 * 468 * Request: [ ipfw_obj_header ipfw_xtable_info ] 469 * 470 * Returns 0 on success. 471 */ 472 static int 473 table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i) 474 { 475 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 476 int error; 477 478 memcpy(tbuf, oh, sizeof(*oh)); 479 memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); 480 oh = (ipfw_obj_header *)tbuf; 481 482 error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf)); 483 484 return (error); 485 } 486 487 /* 488 * Modifies existing table 489 * 490 * ipfw table NAME modify [ limit number ] 491 */ 492 static void 493 table_modify(ipfw_obj_header *oh, int ac, char *av[]) 494 { 495 ipfw_xtable_info xi; 496 int tcmd; 497 size_t sz; 498 char tbuf[128]; 499 500 sz = sizeof(tbuf); 501 memset(&xi, 0, sizeof(xi)); 502 503 while (ac > 0) { 504 tcmd = get_token(tablenewcmds, *av, "option"); 505 ac--; av++; 506 507 switch (tcmd) { 508 case TOK_LIMIT: 509 NEED1("limit value required"); 510 xi.limit = strtol(*av, NULL, 10); 511 xi.mflags |= IPFW_TMFLAGS_LIMIT; 512 ac--; av++; 513 break; 514 default: 515 errx(EX_USAGE, "cmd is not supported for modificatiob"); 516 } 517 } 518 519 if (table_do_modify(oh, &xi) != 0) 520 err(EX_OSERR, "Table modification failed"); 521 } 522 523 /* 524 * Modifies existing table. 525 * 526 * Request: [ ipfw_obj_header ipfw_xtable_info ] 527 * 528 * Returns 0 on success. 529 */ 530 static int 531 table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i) 532 { 533 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 534 int error; 535 536 memcpy(tbuf, oh, sizeof(*oh)); 537 memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); 538 oh = (ipfw_obj_header *)tbuf; 539 540 error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf)); 541 542 return (error); 543 } 544 545 /* 546 * Locks or unlocks given table 547 */ 548 static void 549 table_lock(ipfw_obj_header *oh, int lock) 550 { 551 ipfw_xtable_info xi; 552 553 memset(&xi, 0, sizeof(xi)); 554 555 xi.mflags |= IPFW_TMFLAGS_LOCK; 556 xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0; 557 558 if (table_do_modify(oh, &xi) != 0) 559 err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock"); 560 } 561 562 /* 563 * Destroys given table specified by @oh->ntlv. 564 * Returns 0 on success. 565 */ 566 static int 567 table_destroy(ipfw_obj_header *oh) 568 { 569 570 if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0) 571 return (-1); 572 573 return (0); 574 } 575 576 /* 577 * Flushes given table specified by @oh->ntlv. 578 * Returns 0 on success. 579 */ 580 static int 581 table_flush(ipfw_obj_header *oh) 582 { 583 584 if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0) 585 return (-1); 586 587 return (0); 588 } 589 590 static int 591 table_do_swap(ipfw_obj_header *oh, char *second) 592 { 593 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)]; 594 int error; 595 596 memset(tbuf, 0, sizeof(tbuf)); 597 memcpy(tbuf, oh, sizeof(*oh)); 598 oh = (ipfw_obj_header *)tbuf; 599 table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1); 600 601 error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf)); 602 603 return (error); 604 } 605 606 /* 607 * Swaps given table with @second one. 608 */ 609 static int 610 table_swap(ipfw_obj_header *oh, char *second) 611 { 612 int error; 613 614 if (table_check_name(second) != 0) 615 errx(EX_USAGE, "table name %s is invalid", second); 616 617 error = table_do_swap(oh, second); 618 619 switch (error) { 620 case EINVAL: 621 errx(EX_USAGE, "Unable to swap table: check types"); 622 case EFBIG: 623 errx(EX_USAGE, "Unable to swap table: check limits"); 624 } 625 626 return (0); 627 } 628 629 630 /* 631 * Retrieves table in given table specified by @oh->ntlv. 632 * it inside @i. 633 * Returns 0 on success. 634 */ 635 static int 636 table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i) 637 { 638 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 639 size_t sz; 640 641 sz = sizeof(tbuf); 642 memset(tbuf, 0, sizeof(tbuf)); 643 memcpy(tbuf, oh, sizeof(*oh)); 644 oh = (ipfw_obj_header *)tbuf; 645 646 if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0) 647 return (errno); 648 649 if (sz < sizeof(tbuf)) 650 return (EINVAL); 651 652 *i = *(ipfw_xtable_info *)(oh + 1); 653 654 return (0); 655 } 656 657 static struct _s_x tablealgoclass[] = { 658 { "hash", IPFW_TACLASS_HASH }, 659 { "array", IPFW_TACLASS_ARRAY }, 660 { "radix", IPFW_TACLASS_RADIX }, 661 { NULL, 0 } 662 }; 663 664 struct ta_cldata { 665 uint8_t taclass; 666 uint8_t spare4; 667 uint16_t itemsize; 668 uint16_t itemsize6; 669 uint32_t size; 670 uint32_t count; 671 }; 672 673 /* 674 * Print global/per-AF table @i algorithm info. 675 */ 676 static void 677 table_show_tainfo(ipfw_xtable_info *i, struct ta_cldata *d, 678 const char *af, const char *taclass) 679 { 680 681 switch (d->taclass) { 682 case IPFW_TACLASS_HASH: 683 case IPFW_TACLASS_ARRAY: 684 printf(" %salgorithm %s info\n", af, taclass); 685 if (d->itemsize == d->itemsize6) 686 printf(" size: %u items: %u itemsize: %u\n", 687 d->size, d->count, d->itemsize); 688 else 689 printf(" size: %u items: %u " 690 "itemsize4: %u itemsize6: %u\n", 691 d->size, d->count, 692 d->itemsize, d->itemsize6); 693 break; 694 case IPFW_TACLASS_RADIX: 695 printf(" %salgorithm %s info\n", af, taclass); 696 if (d->itemsize == d->itemsize6) 697 printf(" items: %u itemsize: %u\n", 698 d->count, d->itemsize); 699 else 700 printf(" items: %u " 701 "itemsize4: %u itemsize6: %u\n", 702 d->count, d->itemsize, d->itemsize6); 703 break; 704 default: 705 printf(" algo class: %s\n", taclass); 706 } 707 } 708 709 static void 710 table_print_valheader(char *buf, size_t bufsize, uint32_t vmask) 711 { 712 713 if (vmask == IPFW_VTYPE_LEGACY) { 714 snprintf(buf, bufsize, "legacy"); 715 return; 716 } 717 718 print_flags_buffer(buf, bufsize, tablevaltypes, vmask); 719 } 720 721 /* 722 * Prints table info struct @i in human-readable form. 723 */ 724 static int 725 table_show_info(ipfw_xtable_info *i, void *arg) 726 { 727 const char *vtype; 728 ipfw_ta_tinfo *tainfo; 729 int afdata, afitem; 730 struct ta_cldata d; 731 char ttype[64], tvtype[64]; 732 733 table_print_type(ttype, sizeof(ttype), i->type, i->tflags); 734 table_print_valheader(tvtype, sizeof(tvtype), i->vmask); 735 736 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 737 if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0) 738 printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype); 739 else 740 printf(" kindex: %d, type: %s\n", i->kidx, ttype); 741 printf(" references: %u, valtype: %s\n", i->refcnt, tvtype); 742 printf(" algorithm: %s\n", i->algoname); 743 printf(" items: %u, size: %u\n", i->count, i->size); 744 if (i->limit > 0) 745 printf(" limit: %u\n", i->limit); 746 747 /* Print algo-specific info if requested & set */ 748 if (arg == NULL) 749 return (0); 750 751 if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0) 752 return (0); 753 tainfo = &i->ta_info; 754 755 afdata = 0; 756 afitem = 0; 757 if (tainfo->flags & IPFW_TATFLAGS_AFDATA) 758 afdata = 1; 759 if (tainfo->flags & IPFW_TATFLAGS_AFITEM) 760 afitem = 1; 761 762 memset(&d, 0, sizeof(d)); 763 d.taclass = tainfo->taclass4; 764 d.size = tainfo->size4; 765 d.count = tainfo->count4; 766 d.itemsize = tainfo->itemsize4; 767 if (afdata == 0 && afitem != 0) 768 d.itemsize6 = tainfo->itemsize6; 769 else 770 d.itemsize6 = d.itemsize; 771 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 772 vtype = "unknown"; 773 774 if (afdata == 0) { 775 table_show_tainfo(i, &d, "", vtype); 776 } else { 777 table_show_tainfo(i, &d, "IPv4 ", vtype); 778 memset(&d, 0, sizeof(d)); 779 d.taclass = tainfo->taclass6; 780 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 781 vtype = "unknown"; 782 d.size = tainfo->size6; 783 d.count = tainfo->count6; 784 d.itemsize = tainfo->itemsize6; 785 d.itemsize6 = d.itemsize; 786 table_show_tainfo(i, &d, "IPv6 ", vtype); 787 } 788 789 return (0); 790 } 791 792 793 /* 794 * Function wrappers which can be used either 795 * as is or as foreach function parameter. 796 */ 797 798 static int 799 table_show_one(ipfw_xtable_info *i, void *arg) 800 { 801 ipfw_obj_header *oh; 802 int error; 803 804 if ((error = table_do_get_list(i, &oh)) != 0) { 805 err(EX_OSERR, "Error requesting table %s list", i->tablename); 806 return (error); 807 } 808 809 table_show_list(oh, 1); 810 811 free(oh); 812 return (0); 813 } 814 815 static int 816 table_flush_one(ipfw_xtable_info *i, void *arg) 817 { 818 ipfw_obj_header *oh; 819 820 oh = (ipfw_obj_header *)arg; 821 822 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 823 824 return (table_flush(oh)); 825 } 826 827 static int 828 table_do_modify_record(int cmd, ipfw_obj_header *oh, 829 ipfw_obj_tentry *tent, int count, int atomic) 830 { 831 ipfw_obj_ctlv *ctlv; 832 ipfw_obj_tentry *tent_base; 833 caddr_t pbuf; 834 char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)]; 835 int error, i; 836 size_t sz; 837 838 sz = sizeof(*ctlv) + sizeof(*tent) * count; 839 if (count == 1) { 840 memset(xbuf, 0, sizeof(xbuf)); 841 pbuf = xbuf; 842 } else { 843 if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL) 844 return (ENOMEM); 845 } 846 847 memcpy(pbuf, oh, sizeof(*oh)); 848 oh = (ipfw_obj_header *)pbuf; 849 oh->opheader.version = 1; 850 851 ctlv = (ipfw_obj_ctlv *)(oh + 1); 852 ctlv->count = count; 853 ctlv->head.length = sz; 854 if (atomic != 0) 855 ctlv->flags |= IPFW_CTF_ATOMIC; 856 857 tent_base = tent; 858 memcpy(ctlv + 1, tent, sizeof(*tent) * count); 859 tent = (ipfw_obj_tentry *)(ctlv + 1); 860 for (i = 0; i < count; i++, tent++) { 861 tent->head.length = sizeof(ipfw_obj_tentry); 862 tent->idx = oh->idx; 863 } 864 865 sz += sizeof(*oh); 866 error = do_get3(cmd, &oh->opheader, &sz); 867 tent = (ipfw_obj_tentry *)(ctlv + 1); 868 /* Copy result back to provided buffer */ 869 memcpy(tent_base, ctlv + 1, sizeof(*tent) * count); 870 871 if (pbuf != xbuf) 872 free(pbuf); 873 874 return (error); 875 } 876 877 static void 878 table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, 879 int quiet, int update, int atomic) 880 { 881 ipfw_obj_tentry *ptent, tent, *tent_buf; 882 ipfw_xtable_info xi; 883 uint8_t type; 884 uint32_t vmask; 885 int cmd, count, error, i, ignored; 886 char *texterr, *etxt, *px; 887 888 if (ac == 0) 889 errx(EX_USAGE, "address required"); 890 891 if (add != 0) { 892 cmd = IP_FW_TABLE_XADD; 893 texterr = "Adding record failed"; 894 } else { 895 cmd = IP_FW_TABLE_XDEL; 896 texterr = "Deleting record failed"; 897 } 898 899 /* 900 * Calculate number of entries: 901 * Assume [key val] x N for add 902 * and 903 * key x N for delete 904 */ 905 count = (add != 0) ? ac / 2 + 1 : ac; 906 907 if (count <= 1) { 908 /* Adding single entry with/without value */ 909 memset(&tent, 0, sizeof(tent)); 910 tent_buf = &tent; 911 } else { 912 913 if ((tent_buf = calloc(count, sizeof(tent))) == NULL) 914 errx(EX_OSERR, 915 "Unable to allocate memory for all entries"); 916 } 917 ptent = tent_buf; 918 919 memset(&xi, 0, sizeof(xi)); 920 count = 0; 921 while (ac > 0) { 922 tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi); 923 924 /* 925 * compability layer: auto-create table if not exists 926 */ 927 if (xi.tablename[0] == '\0') { 928 xi.type = type; 929 xi.vmask = vmask; 930 strlcpy(xi.tablename, oh->ntlv.name, 931 sizeof(xi.tablename)); 932 fprintf(stderr, "DEPRECATED: inserting data info " 933 "non-existent table %s. (auto-created)\n", 934 xi.tablename); 935 table_do_create(oh, &xi); 936 } 937 938 oh->ntlv.type = type; 939 ac--; av++; 940 941 if (add != 0 && ac > 0) { 942 tentry_fill_value(oh, ptent, *av, type, vmask); 943 ac--; av++; 944 } 945 946 if (update != 0) 947 ptent->head.flags |= IPFW_TF_UPDATE; 948 949 count++; 950 ptent++; 951 } 952 953 error = table_do_modify_record(cmd, oh, tent_buf, count, atomic); 954 955 quiet = 0; 956 957 /* 958 * Compatibility stuff: do not yell on duplicate keys or 959 * failed deletions. 960 */ 961 if (error == 0 || (error == EEXIST && add != 0) || 962 (error == ENOENT && add == 0)) { 963 if (quiet != 0) { 964 if (tent_buf != &tent) 965 free(tent_buf); 966 return; 967 } 968 } 969 970 /* Report results back */ 971 ptent = tent_buf; 972 for (i = 0; i < count; ptent++, i++) { 973 ignored = 0; 974 switch (ptent->result) { 975 case IPFW_TR_ADDED: 976 px = "added"; 977 break; 978 case IPFW_TR_DELETED: 979 px = "deleted"; 980 break; 981 case IPFW_TR_UPDATED: 982 px = "updated"; 983 break; 984 case IPFW_TR_LIMIT: 985 px = "limit"; 986 ignored = 1; 987 break; 988 case IPFW_TR_ERROR: 989 px = "error"; 990 ignored = 1; 991 break; 992 case IPFW_TR_NOTFOUND: 993 px = "notfound"; 994 ignored = 1; 995 break; 996 case IPFW_TR_EXISTS: 997 px = "exists"; 998 ignored = 1; 999 break; 1000 case IPFW_TR_IGNORED: 1001 px = "ignored"; 1002 ignored = 1; 1003 break; 1004 default: 1005 px = "unknown"; 1006 ignored = 1; 1007 } 1008 1009 if (error != 0 && atomic != 0 && ignored == 0) 1010 printf("%s(reverted): ", px); 1011 else 1012 printf("%s: ", px); 1013 1014 table_show_entry(&xi, ptent); 1015 } 1016 1017 if (tent_buf != &tent) 1018 free(tent_buf); 1019 1020 if (error == 0) 1021 return; 1022 /* Get real OS error */ 1023 error = errno; 1024 1025 /* Try to provide more human-readable error */ 1026 switch (error) { 1027 case EEXIST: 1028 etxt = "record already exists"; 1029 break; 1030 case EFBIG: 1031 etxt = "limit hit"; 1032 break; 1033 case ESRCH: 1034 etxt = "table not found"; 1035 break; 1036 case ENOENT: 1037 etxt = "record not found"; 1038 break; 1039 case EACCES: 1040 etxt = "table is locked"; 1041 break; 1042 default: 1043 etxt = strerror(error); 1044 } 1045 1046 errx(EX_OSERR, "%s: %s", texterr, etxt); 1047 } 1048 1049 static int 1050 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi, 1051 ipfw_obj_tentry *xtent) 1052 { 1053 char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)]; 1054 ipfw_obj_tentry *tent; 1055 uint8_t type; 1056 uint32_t vmask; 1057 size_t sz; 1058 1059 memcpy(xbuf, oh, sizeof(*oh)); 1060 oh = (ipfw_obj_header *)xbuf; 1061 tent = (ipfw_obj_tentry *)(oh + 1); 1062 1063 memset(tent, 0, sizeof(*tent)); 1064 tent->head.length = sizeof(*tent); 1065 tent->idx = 1; 1066 1067 tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi); 1068 oh->ntlv.type = type; 1069 1070 sz = sizeof(xbuf); 1071 if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0) 1072 return (errno); 1073 1074 if (sz < sizeof(xbuf)) 1075 return (EINVAL); 1076 1077 *xtent = *tent; 1078 1079 return (0); 1080 } 1081 1082 static void 1083 table_lookup(ipfw_obj_header *oh, int ac, char *av[]) 1084 { 1085 ipfw_obj_tentry xtent; 1086 ipfw_xtable_info xi; 1087 char key[64]; 1088 int error; 1089 1090 if (ac == 0) 1091 errx(EX_USAGE, "address required"); 1092 1093 strlcpy(key, *av, sizeof(key)); 1094 1095 memset(&xi, 0, sizeof(xi)); 1096 error = table_do_lookup(oh, key, &xi, &xtent); 1097 1098 switch (error) { 1099 case 0: 1100 break; 1101 case ESRCH: 1102 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name); 1103 case ENOENT: 1104 errx(EX_UNAVAILABLE, "Entry %s not found", *av); 1105 case ENOTSUP: 1106 errx(EX_UNAVAILABLE, "Table %s algo does not support " 1107 "\"lookup\" method", oh->ntlv.name); 1108 default: 1109 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)"); 1110 } 1111 1112 table_show_entry(&xi, &xtent); 1113 } 1114 1115 static void 1116 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type, 1117 uint8_t tflags) 1118 { 1119 char *p, *pp; 1120 int mask, af; 1121 struct in6_addr *paddr, tmp; 1122 struct tflow_entry *tfe; 1123 uint32_t key, *pkey; 1124 uint16_t port; 1125 struct protoent *pent; 1126 struct servent *sent; 1127 int masklen; 1128 1129 masklen = 0; 1130 af = 0; 1131 paddr = (struct in6_addr *)&tentry->k; 1132 1133 switch (type) { 1134 case IPFW_TABLE_ADDR: 1135 /* Remove / if exists */ 1136 if ((p = strchr(arg, '/')) != NULL) { 1137 *p = '\0'; 1138 mask = atoi(p + 1); 1139 } 1140 1141 if (inet_pton(AF_INET, arg, paddr) == 1) { 1142 if (p != NULL && mask > 32) 1143 errx(EX_DATAERR, "bad IPv4 mask width: %s", 1144 p + 1); 1145 1146 masklen = p ? mask : 32; 1147 af = AF_INET; 1148 } else if (inet_pton(AF_INET6, arg, paddr) == 1) { 1149 if (IN6_IS_ADDR_V4COMPAT(paddr)) 1150 errx(EX_DATAERR, 1151 "Use IPv4 instead of v4-compatible"); 1152 if (p != NULL && mask > 128) 1153 errx(EX_DATAERR, "bad IPv6 mask width: %s", 1154 p + 1); 1155 1156 masklen = p ? mask : 128; 1157 af = AF_INET6; 1158 } else { 1159 /* Assume FQDN */ 1160 if (lookup_host(arg, (struct in_addr *)paddr) != 0) 1161 errx(EX_NOHOST, "hostname ``%s'' unknown", arg); 1162 1163 masklen = 32; 1164 type = IPFW_TABLE_ADDR; 1165 af = AF_INET; 1166 } 1167 break; 1168 case IPFW_TABLE_INTERFACE: 1169 /* Assume interface name. Copy significant data only */ 1170 mask = MIN(strlen(arg), IF_NAMESIZE - 1); 1171 memcpy(paddr, arg, mask); 1172 /* Set mask to exact match */ 1173 masklen = 8 * IF_NAMESIZE; 1174 break; 1175 case IPFW_TABLE_NUMBER: 1176 /* Port or any other key */ 1177 key = strtol(arg, &p, 10); 1178 if (*p != '\0') 1179 errx(EX_DATAERR, "Invalid number: %s", arg); 1180 1181 pkey = (uint32_t *)paddr; 1182 *pkey = key; 1183 masklen = 32; 1184 break; 1185 case IPFW_TABLE_FLOW: 1186 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */ 1187 tfe = &tentry->k.flow; 1188 af = 0; 1189 1190 /* Handle <ipv4|ipv6> */ 1191 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) { 1192 if ((p = strchr(arg, ',')) != NULL) 1193 *p++ = '\0'; 1194 /* Determine family using temporary storage */ 1195 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1196 if (af != 0 && af != AF_INET) 1197 errx(EX_DATAERR, 1198 "Inconsistent address family\n"); 1199 af = AF_INET; 1200 memcpy(&tfe->a.a4.sip, &tmp, 4); 1201 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1202 if (af != 0 && af != AF_INET6) 1203 errx(EX_DATAERR, 1204 "Inconsistent address family\n"); 1205 af = AF_INET6; 1206 memcpy(&tfe->a.a6.sip6, &tmp, 16); 1207 } 1208 1209 arg = p; 1210 } 1211 1212 /* Handle <proto-num|proto-name> */ 1213 if ((tflags & IPFW_TFFLAG_PROTO) != 0) { 1214 if (arg == NULL) 1215 errx(EX_DATAERR, "invalid key: proto missing"); 1216 if ((p = strchr(arg, ',')) != NULL) 1217 *p++ = '\0'; 1218 1219 key = strtol(arg, &pp, 10); 1220 if (*pp != '\0') { 1221 if ((pent = getprotobyname(arg)) == NULL) 1222 errx(EX_DATAERR, "Unknown proto: %s", 1223 arg); 1224 else 1225 key = pent->p_proto; 1226 } 1227 1228 if (key > 255) 1229 errx(EX_DATAERR, "Bad protocol number: %u",key); 1230 1231 tfe->proto = key; 1232 1233 arg = p; 1234 } 1235 1236 /* Handle <port-num|service-name> */ 1237 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1238 if (arg == NULL) 1239 errx(EX_DATAERR, "invalid key: src port missing"); 1240 if ((p = strchr(arg, ',')) != NULL) 1241 *p++ = '\0'; 1242 1243 if ((port = htons(strtol(arg, NULL, 10))) == 0) { 1244 if ((sent = getservbyname(arg, NULL)) == NULL) 1245 errx(EX_DATAERR, "Unknown service: %s", 1246 arg); 1247 else 1248 key = sent->s_port; 1249 } 1250 1251 tfe->sport = port; 1252 1253 arg = p; 1254 } 1255 1256 /* Handle <ipv4|ipv6>*/ 1257 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) { 1258 if (arg == NULL) 1259 errx(EX_DATAERR, "invalid key: dst ip missing"); 1260 if ((p = strchr(arg, ',')) != NULL) 1261 *p++ = '\0'; 1262 /* Determine family using temporary storage */ 1263 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1264 if (af != 0 && af != AF_INET) 1265 errx(EX_DATAERR, 1266 "Inconsistent address family"); 1267 af = AF_INET; 1268 memcpy(&tfe->a.a4.dip, &tmp, 4); 1269 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1270 if (af != 0 && af != AF_INET6) 1271 errx(EX_DATAERR, 1272 "Inconsistent address family"); 1273 af = AF_INET6; 1274 memcpy(&tfe->a.a6.dip6, &tmp, 16); 1275 } 1276 1277 arg = p; 1278 } 1279 1280 /* Handle <port-num|service-name> */ 1281 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1282 if (arg == NULL) 1283 errx(EX_DATAERR, "invalid key: dst port missing"); 1284 if ((p = strchr(arg, ',')) != NULL) 1285 *p++ = '\0'; 1286 1287 if ((port = htons(strtol(arg, NULL, 10))) == 0) { 1288 if ((sent = getservbyname(arg, NULL)) == NULL) 1289 errx(EX_DATAERR, "Unknown service: %s", 1290 arg); 1291 else 1292 key = sent->s_port; 1293 } 1294 1295 tfe->dport = port; 1296 1297 arg = p; 1298 } 1299 1300 tfe->af = af; 1301 1302 break; 1303 1304 default: 1305 errx(EX_DATAERR, "Unsupported table type: %d", type); 1306 } 1307 1308 tentry->subtype = af; 1309 tentry->masklen = masklen; 1310 } 1311 1312 static void 1313 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key, 1314 int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi) 1315 { 1316 uint8_t type, tflags; 1317 uint32_t vmask; 1318 int error; 1319 char *del; 1320 1321 type = 0; 1322 tflags = 0; 1323 vmask = 0; 1324 1325 if (xi->tablename[0] == '\0') 1326 error = table_get_info(oh, xi); 1327 else 1328 error = 0; 1329 1330 if (error == 0) { 1331 /* Table found. */ 1332 type = xi->type; 1333 tflags = xi->tflags; 1334 vmask = xi->vmask; 1335 } else { 1336 if (error != ESRCH) 1337 errx(EX_OSERR, "Error requesting table %s info", 1338 oh->ntlv.name); 1339 if (add == 0) 1340 errx(EX_DATAERR, "Table %s does not exist", 1341 oh->ntlv.name); 1342 /* 1343 * Table does not exist. 1344 * Compability layer: try to interpret data as ADDR 1345 * before failing. 1346 */ 1347 if ((del = strchr(key, '/')) != NULL) 1348 *del = '\0'; 1349 if (inet_pton(AF_INET, key, &tent->k.addr6) == 1 || 1350 inet_pton(AF_INET6, key, &tent->k.addr6) == 1) { 1351 /* OK Prepare and send */ 1352 type = IPFW_TABLE_ADDR; 1353 vmask = IPFW_VTYPE_LEGACY; 1354 } else { 1355 /* Inknown key */ 1356 errx(EX_USAGE, "Table %s does not exist, cannot guess " 1357 "key '%s' type", oh->ntlv.name, key); 1358 } 1359 if (del != NULL) 1360 *del = '/'; 1361 } 1362 1363 tentry_fill_key_type(key, tent, type, tflags); 1364 1365 *ptype = type; 1366 *pvmask = vmask; 1367 } 1368 1369 static void 1370 set_legacy_value(uint32_t val, ipfw_table_value *v) 1371 { 1372 v->tag = val; 1373 v->pipe = val; 1374 v->divert = val; 1375 v->skipto = val; 1376 v->netgraph = val; 1377 v->fib = val; 1378 v->nat = val; 1379 v->nh4 = val; 1380 v->dscp = (uint8_t)val; 1381 v->limit = val; 1382 } 1383 1384 static void 1385 tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg, 1386 uint8_t type, uint32_t vmask) 1387 { 1388 struct addrinfo hints, *res; 1389 uint32_t a4, flag, val, vm; 1390 ipfw_table_value *v; 1391 uint32_t i; 1392 int dval; 1393 char *comma, *e, *etype, *n, *p; 1394 1395 v = &tent->v.value; 1396 vm = vmask; 1397 1398 /* Compat layer: keep old behavior for legacy value types */ 1399 if (vmask == IPFW_VTYPE_LEGACY) { 1400 /* Try to interpret as number first */ 1401 val = strtoul(arg, &p, 0); 1402 if (*p == '\0') { 1403 set_legacy_value(val, v); 1404 return; 1405 } 1406 if (inet_pton(AF_INET, arg, &val) == 1) { 1407 set_legacy_value(ntohl(val), v); 1408 return; 1409 } 1410 /* Try hostname */ 1411 if (lookup_host(arg, (struct in_addr *)&val) == 0) { 1412 set_legacy_value(val, v); 1413 return; 1414 } 1415 errx(EX_OSERR, "Unable to parse value %s", arg); 1416 } 1417 1418 /* 1419 * Shorthands: handle single value if vmask consists 1420 * of numbers only. e.g.: 1421 * vmask = "fib,skipto" -> treat input "1" as "1,1" 1422 */ 1423 1424 n = arg; 1425 etype = NULL; 1426 for (i = 1; i < (1 << 31); i *= 2) { 1427 if ((flag = (vmask & i)) == 0) 1428 continue; 1429 vmask &= ~flag; 1430 1431 if ((comma = strchr(n, ',')) != NULL) 1432 *comma = '\0'; 1433 1434 switch (flag) { 1435 case IPFW_VTYPE_TAG: 1436 v->tag = strtol(n, &e, 10); 1437 if (*e != '\0') 1438 etype = "tag"; 1439 break; 1440 case IPFW_VTYPE_PIPE: 1441 v->pipe = strtol(n, &e, 10); 1442 if (*e != '\0') 1443 etype = "pipe"; 1444 break; 1445 case IPFW_VTYPE_DIVERT: 1446 v->divert = strtol(n, &e, 10); 1447 if (*e != '\0') 1448 etype = "divert"; 1449 break; 1450 case IPFW_VTYPE_SKIPTO: 1451 v->skipto = strtol(n, &e, 10); 1452 if (*e != '\0') 1453 etype = "skipto"; 1454 break; 1455 case IPFW_VTYPE_NETGRAPH: 1456 v->netgraph = strtol(n, &e, 10); 1457 if (*e != '\0') 1458 etype = "netgraph"; 1459 break; 1460 case IPFW_VTYPE_FIB: 1461 v->fib = strtol(n, &e, 10); 1462 if (*e != '\0') 1463 etype = "fib"; 1464 break; 1465 case IPFW_VTYPE_NAT: 1466 v->nat = strtol(n, &e, 10); 1467 if (*e != '\0') 1468 etype = "nat"; 1469 break; 1470 case IPFW_VTYPE_LIMIT: 1471 v->limit = strtol(n, &e, 10); 1472 if (*e != '\0') 1473 etype = "limit"; 1474 break; 1475 case IPFW_VTYPE_NH4: 1476 if (strchr(n, '.') != NULL && 1477 inet_pton(AF_INET, n, &a4) == 1) { 1478 v->nh4 = ntohl(a4); 1479 break; 1480 } 1481 if (lookup_host(n, (struct in_addr *)&v->nh4) == 0) 1482 break; 1483 etype = "ipv4"; 1484 break; 1485 case IPFW_VTYPE_DSCP: 1486 if (isalpha(*n)) { 1487 if ((dval = match_token(f_ipdscp, n)) != -1) { 1488 v->dscp = dval; 1489 break; 1490 } else 1491 etype = "DSCP code"; 1492 } else { 1493 v->dscp = strtol(n, &e, 10); 1494 if (v->dscp > 63 || *e != '\0') 1495 etype = "DSCP value"; 1496 } 1497 break; 1498 case IPFW_VTYPE_NH6: 1499 if (strchr(n, ':') != NULL) { 1500 memset(&hints, 0, sizeof(hints)); 1501 hints.ai_family = AF_INET6; 1502 hints.ai_flags = AI_NUMERICHOST; 1503 if (getaddrinfo(n, NULL, &hints, &res) == 0) { 1504 v->nh6 = ((struct sockaddr_in6 *) 1505 res->ai_addr)->sin6_addr; 1506 v->zoneid = ((struct sockaddr_in6 *) 1507 res->ai_addr)->sin6_scope_id; 1508 freeaddrinfo(res); 1509 break; 1510 } 1511 } 1512 etype = "ipv6"; 1513 break; 1514 } 1515 1516 if (etype != NULL) 1517 errx(EX_USAGE, "Unable to parse %s as %s", n, etype); 1518 1519 if (comma != NULL) 1520 *comma++ = ','; 1521 1522 if ((n = comma) != NULL) 1523 continue; 1524 1525 /* End of input. */ 1526 if (vmask != 0) 1527 errx(EX_USAGE, "Not enough fields inside value"); 1528 } 1529 } 1530 1531 /* 1532 * Compare table names. 1533 * Honor number comparison. 1534 */ 1535 static int 1536 tablename_cmp(const void *a, const void *b) 1537 { 1538 ipfw_xtable_info *ia, *ib; 1539 1540 ia = (ipfw_xtable_info *)a; 1541 ib = (ipfw_xtable_info *)b; 1542 1543 return (stringnum_cmp(ia->tablename, ib->tablename)); 1544 } 1545 1546 /* 1547 * Retrieves table list from kernel, 1548 * optionally sorts it and calls requested function for each table. 1549 * Returns 0 on success. 1550 */ 1551 static int 1552 tables_foreach(table_cb_t *f, void *arg, int sort) 1553 { 1554 ipfw_obj_lheader *olh; 1555 ipfw_xtable_info *info; 1556 size_t sz; 1557 int i, error; 1558 1559 /* Start with reasonable default */ 1560 sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info); 1561 1562 for (;;) { 1563 if ((olh = calloc(1, sz)) == NULL) 1564 return (ENOMEM); 1565 1566 olh->size = sz; 1567 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) { 1568 sz = olh->size; 1569 free(olh); 1570 if (errno != ENOMEM) 1571 return (errno); 1572 continue; 1573 } 1574 1575 if (sort != 0) 1576 qsort(olh + 1, olh->count, olh->objsize, tablename_cmp); 1577 1578 info = (ipfw_xtable_info *)(olh + 1); 1579 for (i = 0; i < olh->count; i++) { 1580 error = f(info, arg); /* Ignore errors for now */ 1581 info = (ipfw_xtable_info *)((caddr_t)info + olh->objsize); 1582 } 1583 1584 free(olh); 1585 break; 1586 } 1587 1588 return (0); 1589 } 1590 1591 1592 /* 1593 * Retrieves all entries for given table @i in 1594 * eXtended format. Allocate buffer large enough 1595 * to store result. Called needs to free it later. 1596 * 1597 * Returns 0 on success. 1598 */ 1599 static int 1600 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh) 1601 { 1602 ipfw_obj_header *oh; 1603 size_t sz; 1604 int c; 1605 1606 sz = 0; 1607 oh = NULL; 1608 for (c = 0; c < 8; c++) { 1609 if (sz < i->size) 1610 sz = i->size + 44; 1611 if (oh != NULL) 1612 free(oh); 1613 if ((oh = calloc(1, sz)) == NULL) 1614 continue; 1615 table_fill_objheader(oh, i); 1616 oh->opheader.version = 1; /* Current version */ 1617 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) { 1618 *poh = oh; 1619 return (0); 1620 } 1621 1622 if (errno != ENOMEM) 1623 break; 1624 } 1625 free(oh); 1626 1627 return (errno); 1628 } 1629 1630 /* 1631 * Shows all entries from @oh in human-readable format 1632 */ 1633 static void 1634 table_show_list(ipfw_obj_header *oh, int need_header) 1635 { 1636 ipfw_obj_tentry *tent; 1637 uint32_t count; 1638 ipfw_xtable_info *i; 1639 1640 i = (ipfw_xtable_info *)(oh + 1); 1641 tent = (ipfw_obj_tentry *)(i + 1); 1642 1643 if (need_header) 1644 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 1645 1646 count = i->count; 1647 while (count > 0) { 1648 table_show_entry(i, tent); 1649 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length); 1650 count--; 1651 } 1652 } 1653 1654 static void 1655 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, 1656 uint32_t vmask, int print_ip) 1657 { 1658 char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1659 struct sockaddr_in6 sa6; 1660 uint32_t flag, i, l; 1661 size_t sz; 1662 struct in_addr a4; 1663 1664 sz = bufsize; 1665 1666 /* 1667 * Some shorthands for printing values: 1668 * legacy assumes all values are equal, so keep the first one. 1669 */ 1670 if (vmask == IPFW_VTYPE_LEGACY) { 1671 if (print_ip != 0) { 1672 flag = htonl(v->tag); 1673 inet_ntop(AF_INET, &flag, buf, sz); 1674 } else 1675 snprintf(buf, sz, "%u", v->tag); 1676 return; 1677 } 1678 1679 for (i = 1; i < (1 << 31); i *= 2) { 1680 if ((flag = (vmask & i)) == 0) 1681 continue; 1682 l = 0; 1683 1684 switch (flag) { 1685 case IPFW_VTYPE_TAG: 1686 l = snprintf(buf, sz, "%u,", v->tag); 1687 break; 1688 case IPFW_VTYPE_PIPE: 1689 l = snprintf(buf, sz, "%u,", v->pipe); 1690 break; 1691 case IPFW_VTYPE_DIVERT: 1692 l = snprintf(buf, sz, "%d,", v->divert); 1693 break; 1694 case IPFW_VTYPE_SKIPTO: 1695 l = snprintf(buf, sz, "%d,", v->skipto); 1696 break; 1697 case IPFW_VTYPE_NETGRAPH: 1698 l = snprintf(buf, sz, "%u,", v->netgraph); 1699 break; 1700 case IPFW_VTYPE_FIB: 1701 l = snprintf(buf, sz, "%u,", v->fib); 1702 break; 1703 case IPFW_VTYPE_NAT: 1704 l = snprintf(buf, sz, "%u,", v->nat); 1705 break; 1706 case IPFW_VTYPE_LIMIT: 1707 l = snprintf(buf, sz, "%u,", v->limit); 1708 break; 1709 case IPFW_VTYPE_NH4: 1710 a4.s_addr = htonl(v->nh4); 1711 inet_ntop(AF_INET, &a4, abuf, sizeof(abuf)); 1712 l = snprintf(buf, sz, "%s,", abuf); 1713 break; 1714 case IPFW_VTYPE_DSCP: 1715 l = snprintf(buf, sz, "%d,", v->dscp); 1716 break; 1717 case IPFW_VTYPE_NH6: 1718 sa6.sin6_family = AF_INET6; 1719 sa6.sin6_len = sizeof(sa6); 1720 sa6.sin6_addr = v->nh6; 1721 sa6.sin6_port = 0; 1722 sa6.sin6_scope_id = v->zoneid; 1723 if (getnameinfo((const struct sockaddr *)&sa6, 1724 sa6.sin6_len, abuf, sizeof(abuf), NULL, 0, 1725 NI_NUMERICHOST) == 0) 1726 l = snprintf(buf, sz, "%s,", abuf); 1727 break; 1728 } 1729 1730 buf += l; 1731 sz -= l; 1732 } 1733 1734 if (sz != bufsize) 1735 *(buf - 1) = '\0'; 1736 } 1737 1738 static void 1739 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent) 1740 { 1741 char *comma, tbuf[128], pval[128]; 1742 void *paddr; 1743 struct tflow_entry *tfe; 1744 1745 table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask, 1746 co.do_value_as_ip); 1747 1748 switch (i->type) { 1749 case IPFW_TABLE_ADDR: 1750 /* IPv4 or IPv6 prefixes */ 1751 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf)); 1752 printf("%s/%u %s\n", tbuf, tent->masklen, pval); 1753 break; 1754 case IPFW_TABLE_INTERFACE: 1755 /* Interface names */ 1756 printf("%s %s\n", tent->k.iface, pval); 1757 break; 1758 case IPFW_TABLE_NUMBER: 1759 /* numbers */ 1760 printf("%u %s\n", tent->k.key, pval); 1761 break; 1762 case IPFW_TABLE_FLOW: 1763 /* flows */ 1764 tfe = &tent->k.flow; 1765 comma = ""; 1766 1767 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) { 1768 if (tfe->af == AF_INET) 1769 paddr = &tfe->a.a4.sip; 1770 else 1771 paddr = &tfe->a.a6.sip6; 1772 1773 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1774 printf("%s%s", comma, tbuf); 1775 comma = ","; 1776 } 1777 1778 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) { 1779 printf("%s%d", comma, tfe->proto); 1780 comma = ","; 1781 } 1782 1783 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1784 printf("%s%d", comma, ntohs(tfe->sport)); 1785 comma = ","; 1786 } 1787 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) { 1788 if (tfe->af == AF_INET) 1789 paddr = &tfe->a.a4.dip; 1790 else 1791 paddr = &tfe->a.a6.dip6; 1792 1793 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1794 printf("%s%s", comma, tbuf); 1795 comma = ","; 1796 } 1797 1798 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1799 printf("%s%d", comma, ntohs(tfe->dport)); 1800 comma = ","; 1801 } 1802 1803 printf(" %s\n", pval); 1804 } 1805 } 1806 1807 static int 1808 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh) 1809 { 1810 ipfw_obj_lheader req, *olh; 1811 size_t sz; 1812 1813 memset(&req, 0, sizeof(req)); 1814 sz = sizeof(req); 1815 1816 if (do_get3(opcode, &req.opheader, &sz) != 0) 1817 if (errno != ENOMEM) 1818 return (errno); 1819 1820 sz = req.size; 1821 if ((olh = calloc(1, sz)) == NULL) 1822 return (ENOMEM); 1823 1824 olh->size = sz; 1825 if (do_get3(opcode, &olh->opheader, &sz) != 0) { 1826 free(olh); 1827 return (errno); 1828 } 1829 1830 *polh = olh; 1831 return (0); 1832 } 1833 1834 static int 1835 table_do_get_algolist(ipfw_obj_lheader **polh) 1836 { 1837 1838 return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh)); 1839 } 1840 1841 static int 1842 table_do_get_vlist(ipfw_obj_lheader **polh) 1843 { 1844 1845 return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh)); 1846 } 1847 1848 void 1849 ipfw_list_ta(int ac, char *av[]) 1850 { 1851 ipfw_obj_lheader *olh; 1852 ipfw_ta_info *info; 1853 int error, i; 1854 const char *atype; 1855 1856 error = table_do_get_algolist(&olh); 1857 if (error != 0) 1858 err(EX_OSERR, "Unable to request algorithm list"); 1859 1860 info = (ipfw_ta_info *)(olh + 1); 1861 for (i = 0; i < olh->count; i++) { 1862 if ((atype = match_value(tabletypes, info->type)) == NULL) 1863 atype = "unknown"; 1864 printf("--- %s ---\n", info->algoname); 1865 printf(" type: %s\n refcount: %u\n", atype, info->refcnt); 1866 1867 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize); 1868 } 1869 1870 free(olh); 1871 } 1872 1873 1874 /* Copy of current kernel table_value structure */ 1875 struct _table_value { 1876 uint32_t tag; /* O_TAG/O_TAGGED */ 1877 uint32_t pipe; /* O_PIPE/O_QUEUE */ 1878 uint16_t divert; /* O_DIVERT/O_TEE */ 1879 uint16_t skipto; /* skipto, CALLRET */ 1880 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ 1881 uint32_t fib; /* O_SETFIB */ 1882 uint32_t nat; /* O_NAT */ 1883 uint32_t nh4; 1884 uint8_t dscp; 1885 uint8_t spare0; 1886 uint16_t spare1; 1887 /* -- 32 bytes -- */ 1888 struct in6_addr nh6; 1889 uint32_t limit; /* O_LIMIT */ 1890 uint32_t zoneid; 1891 uint64_t refcnt; /* Number of references */ 1892 }; 1893 1894 int 1895 compare_values(const void *_a, const void *_b) 1896 { 1897 struct _table_value *a, *b; 1898 1899 a = (struct _table_value *)_a; 1900 b = (struct _table_value *)_b; 1901 1902 if (a->spare1 < b->spare1) 1903 return (-1); 1904 else if (a->spare1 > b->spare1) 1905 return (1); 1906 1907 return (0); 1908 } 1909 1910 void 1911 ipfw_list_values(int ac, char *av[]) 1912 { 1913 ipfw_obj_lheader *olh; 1914 struct _table_value *v; 1915 int error, i; 1916 uint32_t vmask; 1917 char buf[128]; 1918 1919 error = table_do_get_vlist(&olh); 1920 if (error != 0) 1921 err(EX_OSERR, "Unable to request value list"); 1922 1923 vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */ 1924 1925 table_print_valheader(buf, sizeof(buf), vmask); 1926 printf("HEADER: %s\n", buf); 1927 v = (struct _table_value *)(olh + 1); 1928 qsort(v, olh->count, olh->objsize, compare_values); 1929 for (i = 0; i < olh->count; i++) { 1930 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v, 1931 vmask, 0); 1932 printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf); 1933 v = (struct _table_value *)((caddr_t)v + olh->objsize); 1934 } 1935 1936 free(olh); 1937 } 1938 1939 int 1940 compare_ntlv(const void *_a, const void *_b) 1941 { 1942 ipfw_obj_ntlv *a, *b; 1943 1944 a = (ipfw_obj_ntlv *)_a; 1945 b = (ipfw_obj_ntlv *)_b; 1946 1947 if (a->set < b->set) 1948 return (-1); 1949 else if (a->set > b->set) 1950 return (1); 1951 1952 if (a->idx < b->idx) 1953 return (-1); 1954 else if (a->idx > b->idx) 1955 return (1); 1956 1957 return (0); 1958 } 1959 1960 int 1961 compare_kntlv(const void *k, const void *v) 1962 { 1963 ipfw_obj_ntlv *ntlv; 1964 uint16_t key; 1965 1966 key = *((uint16_t *)k); 1967 ntlv = (ipfw_obj_ntlv *)v; 1968 1969 if (key < ntlv->idx) 1970 return (-1); 1971 else if (key > ntlv->idx) 1972 return (1); 1973 1974 return (0); 1975 } 1976 1977 /* 1978 * Finds table name in @ctlv by @idx. 1979 * Uses the following facts: 1980 * 1) All TLVs are the same size 1981 * 2) Kernel implementation provides already sorted list. 1982 * 1983 * Returns table name or NULL. 1984 */ 1985 char * 1986 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 1987 { 1988 ipfw_obj_ntlv *ntlv; 1989 1990 ntlv = bsearch(&idx, (ctlv + 1), ctlv->count, ctlv->objsize, 1991 compare_kntlv); 1992 1993 if (ntlv != 0) 1994 return (ntlv->name); 1995 1996 return (NULL); 1997 } 1998 1999 void 2000 table_sort_ctlv(ipfw_obj_ctlv *ctlv) 2001 { 2002 2003 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 2004 } 2005 2006 int 2007 table_check_name(char *tablename) 2008 { 2009 int c, i, l; 2010 2011 /* 2012 * Check if tablename is null-terminated and contains 2013 * valid symbols only. Valid mask is: 2014 * [a-zA-Z0-9\-_\.]{1,63} 2015 */ 2016 l = strlen(tablename); 2017 if (l == 0 || l >= 64) 2018 return (EINVAL); 2019 for (i = 0; i < l; i++) { 2020 c = tablename[i]; 2021 if (isalpha(c) || isdigit(c) || c == '_' || 2022 c == '-' || c == '.') 2023 continue; 2024 return (EINVAL); 2025 } 2026 2027 /* Restrict some 'special' names */ 2028 if (strcmp(tablename, "all") == 0) 2029 return (EINVAL); 2030 2031 return (0); 2032 } 2033 2034