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 memset(buf, 0, bufsize); 719 print_flags_buffer(buf, bufsize, tablevaltypes, vmask); 720 } 721 722 /* 723 * Prints table info struct @i in human-readable form. 724 */ 725 static int 726 table_show_info(ipfw_xtable_info *i, void *arg) 727 { 728 const char *vtype; 729 ipfw_ta_tinfo *tainfo; 730 int afdata, afitem; 731 struct ta_cldata d; 732 char ttype[64], tvtype[64]; 733 734 table_print_type(ttype, sizeof(ttype), i->type, i->tflags); 735 table_print_valheader(tvtype, sizeof(tvtype), i->vmask); 736 737 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 738 if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0) 739 printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype); 740 else 741 printf(" kindex: %d, type: %s\n", i->kidx, ttype); 742 printf(" references: %u, valtype: %s\n", i->refcnt, tvtype); 743 printf(" algorithm: %s\n", i->algoname); 744 printf(" items: %u, size: %u\n", i->count, i->size); 745 if (i->limit > 0) 746 printf(" limit: %u\n", i->limit); 747 748 /* Print algo-specific info if requested & set */ 749 if (arg == NULL) 750 return (0); 751 752 if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0) 753 return (0); 754 tainfo = &i->ta_info; 755 756 afdata = 0; 757 afitem = 0; 758 if (tainfo->flags & IPFW_TATFLAGS_AFDATA) 759 afdata = 1; 760 if (tainfo->flags & IPFW_TATFLAGS_AFITEM) 761 afitem = 1; 762 763 memset(&d, 0, sizeof(d)); 764 d.taclass = tainfo->taclass4; 765 d.size = tainfo->size4; 766 d.count = tainfo->count4; 767 d.itemsize = tainfo->itemsize4; 768 if (afdata == 0 && afitem != 0) 769 d.itemsize6 = tainfo->itemsize6; 770 else 771 d.itemsize6 = d.itemsize; 772 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 773 vtype = "unknown"; 774 775 if (afdata == 0) { 776 table_show_tainfo(i, &d, "", vtype); 777 } else { 778 table_show_tainfo(i, &d, "IPv4 ", vtype); 779 memset(&d, 0, sizeof(d)); 780 d.taclass = tainfo->taclass6; 781 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 782 vtype = "unknown"; 783 d.size = tainfo->size6; 784 d.count = tainfo->count6; 785 d.itemsize = tainfo->itemsize6; 786 d.itemsize6 = d.itemsize; 787 table_show_tainfo(i, &d, "IPv6 ", vtype); 788 } 789 790 return (0); 791 } 792 793 794 /* 795 * Function wrappers which can be used either 796 * as is or as foreach function parameter. 797 */ 798 799 static int 800 table_show_one(ipfw_xtable_info *i, void *arg) 801 { 802 ipfw_obj_header *oh; 803 int error; 804 805 if ((error = table_do_get_list(i, &oh)) != 0) { 806 err(EX_OSERR, "Error requesting table %s list", i->tablename); 807 return (error); 808 } 809 810 table_show_list(oh, 1); 811 812 free(oh); 813 return (0); 814 } 815 816 static int 817 table_flush_one(ipfw_xtable_info *i, void *arg) 818 { 819 ipfw_obj_header *oh; 820 821 oh = (ipfw_obj_header *)arg; 822 823 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 824 825 return (table_flush(oh)); 826 } 827 828 static int 829 table_do_modify_record(int cmd, ipfw_obj_header *oh, 830 ipfw_obj_tentry *tent, int count, int atomic) 831 { 832 ipfw_obj_ctlv *ctlv; 833 ipfw_obj_tentry *tent_base; 834 caddr_t pbuf; 835 char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)]; 836 int error, i; 837 size_t sz; 838 839 sz = sizeof(*ctlv) + sizeof(*tent) * count; 840 if (count == 1) { 841 memset(xbuf, 0, sizeof(xbuf)); 842 pbuf = xbuf; 843 } else { 844 if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL) 845 return (ENOMEM); 846 } 847 848 memcpy(pbuf, oh, sizeof(*oh)); 849 oh = (ipfw_obj_header *)pbuf; 850 oh->opheader.version = 1; 851 852 ctlv = (ipfw_obj_ctlv *)(oh + 1); 853 ctlv->count = count; 854 ctlv->head.length = sz; 855 if (atomic != 0) 856 ctlv->flags |= IPFW_CTF_ATOMIC; 857 858 tent_base = tent; 859 memcpy(ctlv + 1, tent, sizeof(*tent) * count); 860 tent = (ipfw_obj_tentry *)(ctlv + 1); 861 for (i = 0; i < count; i++, tent++) { 862 tent->head.length = sizeof(ipfw_obj_tentry); 863 tent->idx = oh->idx; 864 } 865 866 sz += sizeof(*oh); 867 error = do_get3(cmd, &oh->opheader, &sz); 868 tent = (ipfw_obj_tentry *)(ctlv + 1); 869 /* Copy result back to provided buffer */ 870 memcpy(tent_base, ctlv + 1, sizeof(*tent) * count); 871 872 if (pbuf != xbuf) 873 free(pbuf); 874 875 return (error); 876 } 877 878 static void 879 table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, 880 int quiet, int update, int atomic) 881 { 882 ipfw_obj_tentry *ptent, tent, *tent_buf; 883 ipfw_xtable_info xi; 884 uint8_t type; 885 uint32_t vmask; 886 int cmd, count, error, i, ignored; 887 char *texterr, *etxt, *px; 888 889 if (ac == 0) 890 errx(EX_USAGE, "address required"); 891 892 if (add != 0) { 893 cmd = IP_FW_TABLE_XADD; 894 texterr = "Adding record failed"; 895 } else { 896 cmd = IP_FW_TABLE_XDEL; 897 texterr = "Deleting record failed"; 898 } 899 900 /* 901 * Calculate number of entries: 902 * Assume [key val] x N for add 903 * and 904 * key x N for delete 905 */ 906 count = (add != 0) ? ac / 2 + 1 : ac; 907 908 if (count <= 1) { 909 /* Adding single entry with/without value */ 910 memset(&tent, 0, sizeof(tent)); 911 tent_buf = &tent; 912 } else { 913 914 if ((tent_buf = calloc(count, sizeof(tent))) == NULL) 915 errx(EX_OSERR, 916 "Unable to allocate memory for all entries"); 917 } 918 ptent = tent_buf; 919 920 memset(&xi, 0, sizeof(xi)); 921 count = 0; 922 while (ac > 0) { 923 tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi); 924 925 /* 926 * compability layer: auto-create table if not exists 927 */ 928 if (xi.tablename[0] == '\0') { 929 xi.type = type; 930 xi.vmask = vmask; 931 strlcpy(xi.tablename, oh->ntlv.name, 932 sizeof(xi.tablename)); 933 fprintf(stderr, "DEPRECATED: inserting data into " 934 "non-existent table %s. (auto-created)\n", 935 xi.tablename); 936 table_do_create(oh, &xi); 937 } 938 939 oh->ntlv.type = type; 940 ac--; av++; 941 942 if (add != 0 && ac > 0) { 943 tentry_fill_value(oh, ptent, *av, type, vmask); 944 ac--; av++; 945 } 946 947 if (update != 0) 948 ptent->head.flags |= IPFW_TF_UPDATE; 949 950 count++; 951 ptent++; 952 } 953 954 error = table_do_modify_record(cmd, oh, tent_buf, count, atomic); 955 956 quiet = 0; 957 958 /* 959 * Compatibility stuff: do not yell on duplicate keys or 960 * failed deletions. 961 */ 962 if (error == 0 || (error == EEXIST && add != 0) || 963 (error == ENOENT && add == 0)) { 964 if (quiet != 0) { 965 if (tent_buf != &tent) 966 free(tent_buf); 967 return; 968 } 969 } 970 971 /* Report results back */ 972 ptent = tent_buf; 973 for (i = 0; i < count; ptent++, i++) { 974 ignored = 0; 975 switch (ptent->result) { 976 case IPFW_TR_ADDED: 977 px = "added"; 978 break; 979 case IPFW_TR_DELETED: 980 px = "deleted"; 981 break; 982 case IPFW_TR_UPDATED: 983 px = "updated"; 984 break; 985 case IPFW_TR_LIMIT: 986 px = "limit"; 987 ignored = 1; 988 break; 989 case IPFW_TR_ERROR: 990 px = "error"; 991 ignored = 1; 992 break; 993 case IPFW_TR_NOTFOUND: 994 px = "notfound"; 995 ignored = 1; 996 break; 997 case IPFW_TR_EXISTS: 998 px = "exists"; 999 ignored = 1; 1000 break; 1001 case IPFW_TR_IGNORED: 1002 px = "ignored"; 1003 ignored = 1; 1004 break; 1005 default: 1006 px = "unknown"; 1007 ignored = 1; 1008 } 1009 1010 if (error != 0 && atomic != 0 && ignored == 0) 1011 printf("%s(reverted): ", px); 1012 else 1013 printf("%s: ", px); 1014 1015 table_show_entry(&xi, ptent); 1016 } 1017 1018 if (tent_buf != &tent) 1019 free(tent_buf); 1020 1021 if (error == 0) 1022 return; 1023 /* Get real OS error */ 1024 error = errno; 1025 1026 /* Try to provide more human-readable error */ 1027 switch (error) { 1028 case EEXIST: 1029 etxt = "record already exists"; 1030 break; 1031 case EFBIG: 1032 etxt = "limit hit"; 1033 break; 1034 case ESRCH: 1035 etxt = "table not found"; 1036 break; 1037 case ENOENT: 1038 etxt = "record not found"; 1039 break; 1040 case EACCES: 1041 etxt = "table is locked"; 1042 break; 1043 default: 1044 etxt = strerror(error); 1045 } 1046 1047 errx(EX_OSERR, "%s: %s", texterr, etxt); 1048 } 1049 1050 static int 1051 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi, 1052 ipfw_obj_tentry *xtent) 1053 { 1054 char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)]; 1055 ipfw_obj_tentry *tent; 1056 uint8_t type; 1057 uint32_t vmask; 1058 size_t sz; 1059 1060 memcpy(xbuf, oh, sizeof(*oh)); 1061 oh = (ipfw_obj_header *)xbuf; 1062 tent = (ipfw_obj_tentry *)(oh + 1); 1063 1064 memset(tent, 0, sizeof(*tent)); 1065 tent->head.length = sizeof(*tent); 1066 tent->idx = 1; 1067 1068 tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi); 1069 oh->ntlv.type = type; 1070 1071 sz = sizeof(xbuf); 1072 if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0) 1073 return (errno); 1074 1075 if (sz < sizeof(xbuf)) 1076 return (EINVAL); 1077 1078 *xtent = *tent; 1079 1080 return (0); 1081 } 1082 1083 static void 1084 table_lookup(ipfw_obj_header *oh, int ac, char *av[]) 1085 { 1086 ipfw_obj_tentry xtent; 1087 ipfw_xtable_info xi; 1088 char key[64]; 1089 int error; 1090 1091 if (ac == 0) 1092 errx(EX_USAGE, "address required"); 1093 1094 strlcpy(key, *av, sizeof(key)); 1095 1096 memset(&xi, 0, sizeof(xi)); 1097 error = table_do_lookup(oh, key, &xi, &xtent); 1098 1099 switch (error) { 1100 case 0: 1101 break; 1102 case ESRCH: 1103 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name); 1104 case ENOENT: 1105 errx(EX_UNAVAILABLE, "Entry %s not found", *av); 1106 case ENOTSUP: 1107 errx(EX_UNAVAILABLE, "Table %s algo does not support " 1108 "\"lookup\" method", oh->ntlv.name); 1109 default: 1110 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)"); 1111 } 1112 1113 table_show_entry(&xi, &xtent); 1114 } 1115 1116 static void 1117 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type, 1118 uint8_t tflags) 1119 { 1120 char *p, *pp; 1121 int mask, af; 1122 struct in6_addr *paddr, tmp; 1123 struct tflow_entry *tfe; 1124 uint32_t key, *pkey; 1125 uint16_t port; 1126 struct protoent *pent; 1127 struct servent *sent; 1128 int masklen; 1129 1130 masklen = 0; 1131 af = 0; 1132 paddr = (struct in6_addr *)&tentry->k; 1133 1134 switch (type) { 1135 case IPFW_TABLE_ADDR: 1136 /* Remove / if exists */ 1137 if ((p = strchr(arg, '/')) != NULL) { 1138 *p = '\0'; 1139 mask = atoi(p + 1); 1140 } 1141 1142 if (inet_pton(AF_INET, arg, paddr) == 1) { 1143 if (p != NULL && mask > 32) 1144 errx(EX_DATAERR, "bad IPv4 mask width: %s", 1145 p + 1); 1146 1147 masklen = p ? mask : 32; 1148 af = AF_INET; 1149 } else if (inet_pton(AF_INET6, arg, paddr) == 1) { 1150 if (IN6_IS_ADDR_V4COMPAT(paddr)) 1151 errx(EX_DATAERR, 1152 "Use IPv4 instead of v4-compatible"); 1153 if (p != NULL && mask > 128) 1154 errx(EX_DATAERR, "bad IPv6 mask width: %s", 1155 p + 1); 1156 1157 masklen = p ? mask : 128; 1158 af = AF_INET6; 1159 } else { 1160 /* Assume FQDN */ 1161 if (lookup_host(arg, (struct in_addr *)paddr) != 0) 1162 errx(EX_NOHOST, "hostname ``%s'' unknown", arg); 1163 1164 masklen = 32; 1165 type = IPFW_TABLE_ADDR; 1166 af = AF_INET; 1167 } 1168 break; 1169 case IPFW_TABLE_INTERFACE: 1170 /* Assume interface name. Copy significant data only */ 1171 mask = MIN(strlen(arg), IF_NAMESIZE - 1); 1172 memcpy(paddr, arg, mask); 1173 /* Set mask to exact match */ 1174 masklen = 8 * IF_NAMESIZE; 1175 break; 1176 case IPFW_TABLE_NUMBER: 1177 /* Port or any other key */ 1178 key = strtol(arg, &p, 10); 1179 if (*p != '\0') 1180 errx(EX_DATAERR, "Invalid number: %s", arg); 1181 1182 pkey = (uint32_t *)paddr; 1183 *pkey = key; 1184 masklen = 32; 1185 break; 1186 case IPFW_TABLE_FLOW: 1187 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */ 1188 tfe = &tentry->k.flow; 1189 af = 0; 1190 1191 /* Handle <ipv4|ipv6> */ 1192 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) { 1193 if ((p = strchr(arg, ',')) != NULL) 1194 *p++ = '\0'; 1195 /* Determine family using temporary storage */ 1196 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1197 if (af != 0 && af != AF_INET) 1198 errx(EX_DATAERR, 1199 "Inconsistent address family\n"); 1200 af = AF_INET; 1201 memcpy(&tfe->a.a4.sip, &tmp, 4); 1202 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1203 if (af != 0 && af != AF_INET6) 1204 errx(EX_DATAERR, 1205 "Inconsistent address family\n"); 1206 af = AF_INET6; 1207 memcpy(&tfe->a.a6.sip6, &tmp, 16); 1208 } 1209 1210 arg = p; 1211 } 1212 1213 /* Handle <proto-num|proto-name> */ 1214 if ((tflags & IPFW_TFFLAG_PROTO) != 0) { 1215 if (arg == NULL) 1216 errx(EX_DATAERR, "invalid key: proto missing"); 1217 if ((p = strchr(arg, ',')) != NULL) 1218 *p++ = '\0'; 1219 1220 key = strtol(arg, &pp, 10); 1221 if (*pp != '\0') { 1222 if ((pent = getprotobyname(arg)) == NULL) 1223 errx(EX_DATAERR, "Unknown proto: %s", 1224 arg); 1225 else 1226 key = pent->p_proto; 1227 } 1228 1229 if (key > 255) 1230 errx(EX_DATAERR, "Bad protocol number: %u",key); 1231 1232 tfe->proto = key; 1233 1234 arg = p; 1235 } 1236 1237 /* Handle <port-num|service-name> */ 1238 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1239 if (arg == NULL) 1240 errx(EX_DATAERR, "invalid key: src port missing"); 1241 if ((p = strchr(arg, ',')) != NULL) 1242 *p++ = '\0'; 1243 1244 if ((port = htons(strtol(arg, NULL, 10))) == 0) { 1245 if ((sent = getservbyname(arg, NULL)) == NULL) 1246 errx(EX_DATAERR, "Unknown service: %s", 1247 arg); 1248 else 1249 key = sent->s_port; 1250 } 1251 1252 tfe->sport = port; 1253 1254 arg = p; 1255 } 1256 1257 /* Handle <ipv4|ipv6>*/ 1258 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) { 1259 if (arg == NULL) 1260 errx(EX_DATAERR, "invalid key: dst ip missing"); 1261 if ((p = strchr(arg, ',')) != NULL) 1262 *p++ = '\0'; 1263 /* Determine family using temporary storage */ 1264 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1265 if (af != 0 && af != AF_INET) 1266 errx(EX_DATAERR, 1267 "Inconsistent address family"); 1268 af = AF_INET; 1269 memcpy(&tfe->a.a4.dip, &tmp, 4); 1270 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1271 if (af != 0 && af != AF_INET6) 1272 errx(EX_DATAERR, 1273 "Inconsistent address family"); 1274 af = AF_INET6; 1275 memcpy(&tfe->a.a6.dip6, &tmp, 16); 1276 } 1277 1278 arg = p; 1279 } 1280 1281 /* Handle <port-num|service-name> */ 1282 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1283 if (arg == NULL) 1284 errx(EX_DATAERR, "invalid key: dst port missing"); 1285 if ((p = strchr(arg, ',')) != NULL) 1286 *p++ = '\0'; 1287 1288 if ((port = htons(strtol(arg, NULL, 10))) == 0) { 1289 if ((sent = getservbyname(arg, NULL)) == NULL) 1290 errx(EX_DATAERR, "Unknown service: %s", 1291 arg); 1292 else 1293 key = sent->s_port; 1294 } 1295 1296 tfe->dport = port; 1297 1298 arg = p; 1299 } 1300 1301 tfe->af = af; 1302 1303 break; 1304 1305 default: 1306 errx(EX_DATAERR, "Unsupported table type: %d", type); 1307 } 1308 1309 tentry->subtype = af; 1310 tentry->masklen = masklen; 1311 } 1312 1313 /* 1314 * Tries to guess table key type. 1315 * This procedure is used in legacy table auto-create 1316 * code AND in `ipfw -n` ruleset checking. 1317 * 1318 * Imported from old table_fill_xentry() parse code. 1319 */ 1320 static int 1321 guess_key_type(char *key, uint8_t *ptype) 1322 { 1323 char *p; 1324 struct in6_addr addr; 1325 uint32_t kv; 1326 1327 if (ishexnumber(*key) != 0 || *key == ':') { 1328 /* Remove / if exists */ 1329 if ((p = strchr(key, '/')) != NULL) 1330 *p = '\0'; 1331 1332 if ((inet_pton(AF_INET, key, &addr) == 1) || 1333 (inet_pton(AF_INET6, key, &addr) == 1)) { 1334 *ptype = IPFW_TABLE_CIDR; 1335 if (p != NULL) 1336 *p = '/'; 1337 return (0); 1338 } else { 1339 /* Port or any other key */ 1340 /* Skip non-base 10 entries like 'fa1' */ 1341 kv = strtol(key, &p, 10); 1342 if (*p == '\0') { 1343 *ptype = IPFW_TABLE_NUMBER; 1344 return (0); 1345 } else if ((p != key) && (*p == '.')) { 1346 /* 1347 * Warn on IPv4 address strings 1348 * which are "valid" for inet_aton() but not 1349 * in inet_pton(). 1350 * 1351 * Typical examples: '10.5' or '10.0.0.05' 1352 */ 1353 return (1); 1354 } 1355 } 1356 } 1357 1358 if (strchr(key, '.') == NULL) { 1359 *ptype = IPFW_TABLE_INTERFACE; 1360 return (0); 1361 } 1362 1363 if (lookup_host(key, (struct in_addr *)&addr) != 0) 1364 return (1); 1365 1366 *ptype = IPFW_TABLE_CIDR; 1367 return (0); 1368 } 1369 1370 static void 1371 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key, 1372 int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi) 1373 { 1374 uint8_t type, tflags; 1375 uint32_t vmask; 1376 int error; 1377 1378 type = 0; 1379 tflags = 0; 1380 vmask = 0; 1381 1382 if (xi->tablename[0] == '\0') 1383 error = table_get_info(oh, xi); 1384 else 1385 error = 0; 1386 1387 if (error == 0) { 1388 if (co.test_only == 0) { 1389 /* Table found */ 1390 type = xi->type; 1391 tflags = xi->tflags; 1392 vmask = xi->vmask; 1393 } else { 1394 /* 1395 * we're running `ipfw -n` 1396 * Compability layer: try to guess key type 1397 * before failing. 1398 */ 1399 if (guess_key_type(key, &type) != 0) { 1400 /* Inknown key */ 1401 errx(EX_USAGE, "Cannot guess " 1402 "key '%s' type", key); 1403 } 1404 vmask = IPFW_VTYPE_LEGACY; 1405 } 1406 } else { 1407 if (error != ESRCH) 1408 errx(EX_OSERR, "Error requesting table %s info", 1409 oh->ntlv.name); 1410 if (add == 0) 1411 errx(EX_DATAERR, "Table %s does not exist", 1412 oh->ntlv.name); 1413 /* 1414 * Table does not exist 1415 * Compability layer: try to guess key type before failing. 1416 */ 1417 if (guess_key_type(key, &type) != 0) { 1418 /* Inknown key */ 1419 errx(EX_USAGE, "Table %s does not exist, cannot guess " 1420 "key '%s' type", oh->ntlv.name, key); 1421 } 1422 1423 vmask = IPFW_VTYPE_LEGACY; 1424 } 1425 1426 tentry_fill_key_type(key, tent, type, tflags); 1427 1428 *ptype = type; 1429 *pvmask = vmask; 1430 } 1431 1432 static void 1433 set_legacy_value(uint32_t val, ipfw_table_value *v) 1434 { 1435 v->tag = val; 1436 v->pipe = val; 1437 v->divert = val; 1438 v->skipto = val; 1439 v->netgraph = val; 1440 v->fib = val; 1441 v->nat = val; 1442 v->nh4 = val; 1443 v->dscp = (uint8_t)val; 1444 v->limit = val; 1445 } 1446 1447 static void 1448 tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg, 1449 uint8_t type, uint32_t vmask) 1450 { 1451 struct addrinfo hints, *res; 1452 uint32_t a4, flag, val, vm; 1453 ipfw_table_value *v; 1454 uint32_t i; 1455 int dval; 1456 char *comma, *e, *etype, *n, *p; 1457 1458 v = &tent->v.value; 1459 vm = vmask; 1460 1461 /* Compat layer: keep old behavior for legacy value types */ 1462 if (vmask == IPFW_VTYPE_LEGACY) { 1463 /* Try to interpret as number first */ 1464 val = strtoul(arg, &p, 0); 1465 if (*p == '\0') { 1466 set_legacy_value(val, v); 1467 return; 1468 } 1469 if (inet_pton(AF_INET, arg, &val) == 1) { 1470 set_legacy_value(ntohl(val), v); 1471 return; 1472 } 1473 /* Try hostname */ 1474 if (lookup_host(arg, (struct in_addr *)&val) == 0) { 1475 set_legacy_value(val, v); 1476 return; 1477 } 1478 errx(EX_OSERR, "Unable to parse value %s", arg); 1479 } 1480 1481 /* 1482 * Shorthands: handle single value if vmask consists 1483 * of numbers only. e.g.: 1484 * vmask = "fib,skipto" -> treat input "1" as "1,1" 1485 */ 1486 1487 n = arg; 1488 etype = NULL; 1489 for (i = 1; i < (1 << 31); i *= 2) { 1490 if ((flag = (vmask & i)) == 0) 1491 continue; 1492 vmask &= ~flag; 1493 1494 if ((comma = strchr(n, ',')) != NULL) 1495 *comma = '\0'; 1496 1497 switch (flag) { 1498 case IPFW_VTYPE_TAG: 1499 v->tag = strtol(n, &e, 10); 1500 if (*e != '\0') 1501 etype = "tag"; 1502 break; 1503 case IPFW_VTYPE_PIPE: 1504 v->pipe = strtol(n, &e, 10); 1505 if (*e != '\0') 1506 etype = "pipe"; 1507 break; 1508 case IPFW_VTYPE_DIVERT: 1509 v->divert = strtol(n, &e, 10); 1510 if (*e != '\0') 1511 etype = "divert"; 1512 break; 1513 case IPFW_VTYPE_SKIPTO: 1514 v->skipto = strtol(n, &e, 10); 1515 if (*e != '\0') 1516 etype = "skipto"; 1517 break; 1518 case IPFW_VTYPE_NETGRAPH: 1519 v->netgraph = strtol(n, &e, 10); 1520 if (*e != '\0') 1521 etype = "netgraph"; 1522 break; 1523 case IPFW_VTYPE_FIB: 1524 v->fib = strtol(n, &e, 10); 1525 if (*e != '\0') 1526 etype = "fib"; 1527 break; 1528 case IPFW_VTYPE_NAT: 1529 v->nat = strtol(n, &e, 10); 1530 if (*e != '\0') 1531 etype = "nat"; 1532 break; 1533 case IPFW_VTYPE_LIMIT: 1534 v->limit = strtol(n, &e, 10); 1535 if (*e != '\0') 1536 etype = "limit"; 1537 break; 1538 case IPFW_VTYPE_NH4: 1539 if (strchr(n, '.') != NULL && 1540 inet_pton(AF_INET, n, &a4) == 1) { 1541 v->nh4 = ntohl(a4); 1542 break; 1543 } 1544 if (lookup_host(n, (struct in_addr *)&v->nh4) == 0) 1545 break; 1546 etype = "ipv4"; 1547 break; 1548 case IPFW_VTYPE_DSCP: 1549 if (isalpha(*n)) { 1550 if ((dval = match_token(f_ipdscp, n)) != -1) { 1551 v->dscp = dval; 1552 break; 1553 } else 1554 etype = "DSCP code"; 1555 } else { 1556 v->dscp = strtol(n, &e, 10); 1557 if (v->dscp > 63 || *e != '\0') 1558 etype = "DSCP value"; 1559 } 1560 break; 1561 case IPFW_VTYPE_NH6: 1562 if (strchr(n, ':') != NULL) { 1563 memset(&hints, 0, sizeof(hints)); 1564 hints.ai_family = AF_INET6; 1565 hints.ai_flags = AI_NUMERICHOST; 1566 if (getaddrinfo(n, NULL, &hints, &res) == 0) { 1567 v->nh6 = ((struct sockaddr_in6 *) 1568 res->ai_addr)->sin6_addr; 1569 v->zoneid = ((struct sockaddr_in6 *) 1570 res->ai_addr)->sin6_scope_id; 1571 freeaddrinfo(res); 1572 break; 1573 } 1574 } 1575 etype = "ipv6"; 1576 break; 1577 } 1578 1579 if (etype != NULL) 1580 errx(EX_USAGE, "Unable to parse %s as %s", n, etype); 1581 1582 if (comma != NULL) 1583 *comma++ = ','; 1584 1585 if ((n = comma) != NULL) 1586 continue; 1587 1588 /* End of input. */ 1589 if (vmask != 0) 1590 errx(EX_USAGE, "Not enough fields inside value"); 1591 } 1592 } 1593 1594 /* 1595 * Compare table names. 1596 * Honor number comparison. 1597 */ 1598 static int 1599 tablename_cmp(const void *a, const void *b) 1600 { 1601 ipfw_xtable_info *ia, *ib; 1602 1603 ia = (ipfw_xtable_info *)a; 1604 ib = (ipfw_xtable_info *)b; 1605 1606 return (stringnum_cmp(ia->tablename, ib->tablename)); 1607 } 1608 1609 /* 1610 * Retrieves table list from kernel, 1611 * optionally sorts it and calls requested function for each table. 1612 * Returns 0 on success. 1613 */ 1614 static int 1615 tables_foreach(table_cb_t *f, void *arg, int sort) 1616 { 1617 ipfw_obj_lheader *olh; 1618 ipfw_xtable_info *info; 1619 size_t sz; 1620 int i, error; 1621 1622 /* Start with reasonable default */ 1623 sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info); 1624 1625 for (;;) { 1626 if ((olh = calloc(1, sz)) == NULL) 1627 return (ENOMEM); 1628 1629 olh->size = sz; 1630 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) { 1631 sz = olh->size; 1632 free(olh); 1633 if (errno != ENOMEM) 1634 return (errno); 1635 continue; 1636 } 1637 1638 if (sort != 0) 1639 qsort(olh + 1, olh->count, olh->objsize, tablename_cmp); 1640 1641 info = (ipfw_xtable_info *)(olh + 1); 1642 for (i = 0; i < olh->count; i++) { 1643 error = f(info, arg); /* Ignore errors for now */ 1644 info = (ipfw_xtable_info *)((caddr_t)info + olh->objsize); 1645 } 1646 1647 free(olh); 1648 break; 1649 } 1650 1651 return (0); 1652 } 1653 1654 1655 /* 1656 * Retrieves all entries for given table @i in 1657 * eXtended format. Allocate buffer large enough 1658 * to store result. Called needs to free it later. 1659 * 1660 * Returns 0 on success. 1661 */ 1662 static int 1663 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh) 1664 { 1665 ipfw_obj_header *oh; 1666 size_t sz; 1667 int c; 1668 1669 sz = 0; 1670 oh = NULL; 1671 for (c = 0; c < 8; c++) { 1672 if (sz < i->size) 1673 sz = i->size + 44; 1674 if (oh != NULL) 1675 free(oh); 1676 if ((oh = calloc(1, sz)) == NULL) 1677 continue; 1678 table_fill_objheader(oh, i); 1679 oh->opheader.version = 1; /* Current version */ 1680 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) { 1681 *poh = oh; 1682 return (0); 1683 } 1684 1685 if (errno != ENOMEM) 1686 break; 1687 } 1688 free(oh); 1689 1690 return (errno); 1691 } 1692 1693 /* 1694 * Shows all entries from @oh in human-readable format 1695 */ 1696 static void 1697 table_show_list(ipfw_obj_header *oh, int need_header) 1698 { 1699 ipfw_obj_tentry *tent; 1700 uint32_t count; 1701 ipfw_xtable_info *i; 1702 1703 i = (ipfw_xtable_info *)(oh + 1); 1704 tent = (ipfw_obj_tentry *)(i + 1); 1705 1706 if (need_header) 1707 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 1708 1709 count = i->count; 1710 while (count > 0) { 1711 table_show_entry(i, tent); 1712 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length); 1713 count--; 1714 } 1715 } 1716 1717 static void 1718 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, 1719 uint32_t vmask, int print_ip) 1720 { 1721 char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1722 struct sockaddr_in6 sa6; 1723 uint32_t flag, i, l; 1724 size_t sz; 1725 struct in_addr a4; 1726 1727 sz = bufsize; 1728 1729 /* 1730 * Some shorthands for printing values: 1731 * legacy assumes all values are equal, so keep the first one. 1732 */ 1733 if (vmask == IPFW_VTYPE_LEGACY) { 1734 if (print_ip != 0) { 1735 flag = htonl(v->tag); 1736 inet_ntop(AF_INET, &flag, buf, sz); 1737 } else 1738 snprintf(buf, sz, "%u", v->tag); 1739 return; 1740 } 1741 1742 for (i = 1; i < (1 << 31); i *= 2) { 1743 if ((flag = (vmask & i)) == 0) 1744 continue; 1745 l = 0; 1746 1747 switch (flag) { 1748 case IPFW_VTYPE_TAG: 1749 l = snprintf(buf, sz, "%u,", v->tag); 1750 break; 1751 case IPFW_VTYPE_PIPE: 1752 l = snprintf(buf, sz, "%u,", v->pipe); 1753 break; 1754 case IPFW_VTYPE_DIVERT: 1755 l = snprintf(buf, sz, "%d,", v->divert); 1756 break; 1757 case IPFW_VTYPE_SKIPTO: 1758 l = snprintf(buf, sz, "%d,", v->skipto); 1759 break; 1760 case IPFW_VTYPE_NETGRAPH: 1761 l = snprintf(buf, sz, "%u,", v->netgraph); 1762 break; 1763 case IPFW_VTYPE_FIB: 1764 l = snprintf(buf, sz, "%u,", v->fib); 1765 break; 1766 case IPFW_VTYPE_NAT: 1767 l = snprintf(buf, sz, "%u,", v->nat); 1768 break; 1769 case IPFW_VTYPE_LIMIT: 1770 l = snprintf(buf, sz, "%u,", v->limit); 1771 break; 1772 case IPFW_VTYPE_NH4: 1773 a4.s_addr = htonl(v->nh4); 1774 inet_ntop(AF_INET, &a4, abuf, sizeof(abuf)); 1775 l = snprintf(buf, sz, "%s,", abuf); 1776 break; 1777 case IPFW_VTYPE_DSCP: 1778 l = snprintf(buf, sz, "%d,", v->dscp); 1779 break; 1780 case IPFW_VTYPE_NH6: 1781 sa6.sin6_family = AF_INET6; 1782 sa6.sin6_len = sizeof(sa6); 1783 sa6.sin6_addr = v->nh6; 1784 sa6.sin6_port = 0; 1785 sa6.sin6_scope_id = v->zoneid; 1786 if (getnameinfo((const struct sockaddr *)&sa6, 1787 sa6.sin6_len, abuf, sizeof(abuf), NULL, 0, 1788 NI_NUMERICHOST) == 0) 1789 l = snprintf(buf, sz, "%s,", abuf); 1790 break; 1791 } 1792 1793 buf += l; 1794 sz -= l; 1795 } 1796 1797 if (sz != bufsize) 1798 *(buf - 1) = '\0'; 1799 } 1800 1801 static void 1802 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent) 1803 { 1804 char *comma, tbuf[128], pval[128]; 1805 void *paddr; 1806 struct tflow_entry *tfe; 1807 1808 table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask, 1809 co.do_value_as_ip); 1810 1811 switch (i->type) { 1812 case IPFW_TABLE_ADDR: 1813 /* IPv4 or IPv6 prefixes */ 1814 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf)); 1815 printf("%s/%u %s\n", tbuf, tent->masklen, pval); 1816 break; 1817 case IPFW_TABLE_INTERFACE: 1818 /* Interface names */ 1819 printf("%s %s\n", tent->k.iface, pval); 1820 break; 1821 case IPFW_TABLE_NUMBER: 1822 /* numbers */ 1823 printf("%u %s\n", tent->k.key, pval); 1824 break; 1825 case IPFW_TABLE_FLOW: 1826 /* flows */ 1827 tfe = &tent->k.flow; 1828 comma = ""; 1829 1830 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) { 1831 if (tfe->af == AF_INET) 1832 paddr = &tfe->a.a4.sip; 1833 else 1834 paddr = &tfe->a.a6.sip6; 1835 1836 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1837 printf("%s%s", comma, tbuf); 1838 comma = ","; 1839 } 1840 1841 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) { 1842 printf("%s%d", comma, tfe->proto); 1843 comma = ","; 1844 } 1845 1846 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1847 printf("%s%d", comma, ntohs(tfe->sport)); 1848 comma = ","; 1849 } 1850 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) { 1851 if (tfe->af == AF_INET) 1852 paddr = &tfe->a.a4.dip; 1853 else 1854 paddr = &tfe->a.a6.dip6; 1855 1856 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1857 printf("%s%s", comma, tbuf); 1858 comma = ","; 1859 } 1860 1861 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1862 printf("%s%d", comma, ntohs(tfe->dport)); 1863 comma = ","; 1864 } 1865 1866 printf(" %s\n", pval); 1867 } 1868 } 1869 1870 static int 1871 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh) 1872 { 1873 ipfw_obj_lheader req, *olh; 1874 size_t sz; 1875 1876 memset(&req, 0, sizeof(req)); 1877 sz = sizeof(req); 1878 1879 if (do_get3(opcode, &req.opheader, &sz) != 0) 1880 if (errno != ENOMEM) 1881 return (errno); 1882 1883 sz = req.size; 1884 if ((olh = calloc(1, sz)) == NULL) 1885 return (ENOMEM); 1886 1887 olh->size = sz; 1888 if (do_get3(opcode, &olh->opheader, &sz) != 0) { 1889 free(olh); 1890 return (errno); 1891 } 1892 1893 *polh = olh; 1894 return (0); 1895 } 1896 1897 static int 1898 table_do_get_algolist(ipfw_obj_lheader **polh) 1899 { 1900 1901 return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh)); 1902 } 1903 1904 static int 1905 table_do_get_vlist(ipfw_obj_lheader **polh) 1906 { 1907 1908 return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh)); 1909 } 1910 1911 void 1912 ipfw_list_ta(int ac, char *av[]) 1913 { 1914 ipfw_obj_lheader *olh; 1915 ipfw_ta_info *info; 1916 int error, i; 1917 const char *atype; 1918 1919 error = table_do_get_algolist(&olh); 1920 if (error != 0) 1921 err(EX_OSERR, "Unable to request algorithm list"); 1922 1923 info = (ipfw_ta_info *)(olh + 1); 1924 for (i = 0; i < olh->count; i++) { 1925 if ((atype = match_value(tabletypes, info->type)) == NULL) 1926 atype = "unknown"; 1927 printf("--- %s ---\n", info->algoname); 1928 printf(" type: %s\n refcount: %u\n", atype, info->refcnt); 1929 1930 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize); 1931 } 1932 1933 free(olh); 1934 } 1935 1936 1937 /* Copy of current kernel table_value structure */ 1938 struct _table_value { 1939 uint32_t tag; /* O_TAG/O_TAGGED */ 1940 uint32_t pipe; /* O_PIPE/O_QUEUE */ 1941 uint16_t divert; /* O_DIVERT/O_TEE */ 1942 uint16_t skipto; /* skipto, CALLRET */ 1943 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ 1944 uint32_t fib; /* O_SETFIB */ 1945 uint32_t nat; /* O_NAT */ 1946 uint32_t nh4; 1947 uint8_t dscp; 1948 uint8_t spare0; 1949 uint16_t spare1; 1950 /* -- 32 bytes -- */ 1951 struct in6_addr nh6; 1952 uint32_t limit; /* O_LIMIT */ 1953 uint32_t zoneid; 1954 uint64_t refcnt; /* Number of references */ 1955 }; 1956 1957 int 1958 compare_values(const void *_a, const void *_b) 1959 { 1960 struct _table_value *a, *b; 1961 1962 a = (struct _table_value *)_a; 1963 b = (struct _table_value *)_b; 1964 1965 if (a->spare1 < b->spare1) 1966 return (-1); 1967 else if (a->spare1 > b->spare1) 1968 return (1); 1969 1970 return (0); 1971 } 1972 1973 void 1974 ipfw_list_values(int ac, char *av[]) 1975 { 1976 ipfw_obj_lheader *olh; 1977 struct _table_value *v; 1978 int error, i; 1979 uint32_t vmask; 1980 char buf[128]; 1981 1982 error = table_do_get_vlist(&olh); 1983 if (error != 0) 1984 err(EX_OSERR, "Unable to request value list"); 1985 1986 vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */ 1987 1988 table_print_valheader(buf, sizeof(buf), vmask); 1989 printf("HEADER: %s\n", buf); 1990 v = (struct _table_value *)(olh + 1); 1991 qsort(v, olh->count, olh->objsize, compare_values); 1992 for (i = 0; i < olh->count; i++) { 1993 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v, 1994 vmask, 0); 1995 printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf); 1996 v = (struct _table_value *)((caddr_t)v + olh->objsize); 1997 } 1998 1999 free(olh); 2000 } 2001 2002 int 2003 table_check_name(char *tablename) 2004 { 2005 int c, i, l; 2006 2007 /* 2008 * Check if tablename is null-terminated and contains 2009 * valid symbols only. Valid mask is: 2010 * [a-zA-Z0-9\-_\.]{1,63} 2011 */ 2012 l = strlen(tablename); 2013 if (l == 0 || l >= 64) 2014 return (EINVAL); 2015 for (i = 0; i < l; i++) { 2016 c = tablename[i]; 2017 if (isalpha(c) || isdigit(c) || c == '_' || 2018 c == '-' || c == '.') 2019 continue; 2020 return (EINVAL); 2021 } 2022 2023 /* Restrict some 'special' names */ 2024 if (strcmp(tablename, "all") == 0) 2025 return (EINVAL); 2026 2027 return (0); 2028 } 2029 2030