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 57 static int table_destroy_one(ipfw_xtable_info *i, void *arg); 58 static int table_flush_one(ipfw_xtable_info *i, void *arg); 59 static int table_show_one(ipfw_xtable_info *i, void *arg); 60 static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh); 61 static void table_show_list(ipfw_obj_header *oh, int need_header); 62 static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent); 63 64 static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, 65 char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi); 66 static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, 67 char *arg, uint8_t type, uint32_t vmask); 68 static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, 69 uint32_t vmask, int print_ip); 70 71 typedef int (table_cb_t)(ipfw_xtable_info *i, void *arg); 72 static int tables_foreach(table_cb_t *f, void *arg, int sort); 73 74 #ifndef s6_addr32 75 #define s6_addr32 __u6_addr.__u6_addr32 76 #endif 77 78 static struct _s_x tabletypes[] = { 79 { "addr", IPFW_TABLE_ADDR }, 80 { "iface", IPFW_TABLE_INTERFACE }, 81 { "number", IPFW_TABLE_NUMBER }, 82 { "flow", IPFW_TABLE_FLOW }, 83 { NULL, 0 } 84 }; 85 86 static struct _s_x tablevaltypes[] = { 87 { "skipto", IPFW_VTYPE_SKIPTO }, 88 { "pipe", IPFW_VTYPE_PIPE }, 89 { "fib", IPFW_VTYPE_FIB }, 90 { "nat", IPFW_VTYPE_NAT }, 91 { "dscp", IPFW_VTYPE_DSCP }, 92 { "tag", IPFW_VTYPE_TAG }, 93 { "divert", IPFW_VTYPE_DIVERT }, 94 { "netgraph", IPFW_VTYPE_NETGRAPH }, 95 { "limit", IPFW_VTYPE_LIMIT }, 96 { "ipv4", IPFW_VTYPE_NH4 }, 97 { "ipv6", IPFW_VTYPE_NH6 }, 98 { NULL, 0 } 99 }; 100 101 static struct _s_x tablecmds[] = { 102 { "add", TOK_ADD }, 103 { "delete", TOK_DEL }, 104 { "create", TOK_CREATE }, 105 { "destroy", TOK_DESTROY }, 106 { "flush", TOK_FLUSH }, 107 { "modify", TOK_MODIFY }, 108 { "swap", TOK_SWAP }, 109 { "info", TOK_INFO }, 110 { "detail", TOK_DETAIL }, 111 { "list", TOK_LIST }, 112 { "lookup", TOK_LOOKUP }, 113 { "atomic", TOK_ATOMIC }, 114 { "lock", TOK_LOCK }, 115 { "unlock", TOK_UNLOCK }, 116 { NULL, 0 } 117 }; 118 119 static int 120 lookup_host (char *host, struct in_addr *ipaddr) 121 { 122 struct hostent *he; 123 124 if (!inet_aton(host, ipaddr)) { 125 if ((he = gethostbyname(host)) == NULL) 126 return(-1); 127 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 128 } 129 return(0); 130 } 131 132 /* 133 * This one handles all table-related commands 134 * ipfw table NAME create ... 135 * ipfw table NAME modify ... 136 * ipfw table {NAME | all} destroy 137 * ipfw table NAME swap NAME 138 * ipfw table NAME lock 139 * ipfw table NAME unlock 140 * ipfw table NAME add addr[/masklen] [value] 141 * ipfw table NAME add [addr[/masklen] value] [addr[/masklen] value] .. 142 * ipfw table NAME delete addr[/masklen] [addr[/masklen]] .. 143 * ipfw table NAME lookup addr 144 * ipfw table {NAME | all} flush 145 * ipfw table {NAME | all} list 146 * ipfw table {NAME | all} info 147 * ipfw table {NAME | all} detail 148 */ 149 void 150 ipfw_table_handler(int ac, char *av[]) 151 { 152 int do_add, is_all; 153 int atomic, error, tcmd; 154 ipfw_xtable_info i; 155 ipfw_obj_header oh; 156 char *tablename; 157 uint8_t set; 158 void *arg; 159 160 memset(&oh, 0, sizeof(oh)); 161 is_all = 0; 162 if (co.use_set != 0) 163 set = co.use_set - 1; 164 else 165 set = 0; 166 167 ac--; av++; 168 NEED1("table needs name"); 169 tablename = *av; 170 171 if (table_check_name(tablename) == 0) { 172 table_fill_ntlv(&oh.ntlv, *av, set, 1); 173 oh.idx = 1; 174 } else { 175 if (strcmp(tablename, "all") == 0) 176 is_all = 1; 177 else 178 errx(EX_USAGE, "table name %s is invalid", tablename); 179 } 180 ac--; av++; 181 NEED1("table needs command"); 182 183 tcmd = get_token(tablecmds, *av, "table command"); 184 /* Check if atomic operation was requested */ 185 atomic = 0; 186 if (tcmd == TOK_ATOMIC) { 187 ac--; av++; 188 NEED1("atomic needs command"); 189 tcmd = get_token(tablecmds, *av, "table command"); 190 switch (tcmd) { 191 case TOK_ADD: 192 break; 193 default: 194 errx(EX_USAGE, "atomic is not compatible with %s", *av); 195 } 196 atomic = 1; 197 } 198 199 switch (tcmd) { 200 case TOK_LIST: 201 case TOK_INFO: 202 case TOK_DETAIL: 203 case TOK_FLUSH: 204 case TOK_DESTROY: 205 break; 206 default: 207 if (is_all != 0) 208 errx(EX_USAGE, "table name required"); 209 } 210 211 switch (tcmd) { 212 case TOK_ADD: 213 case TOK_DEL: 214 do_add = **av == 'a'; 215 ac--; av++; 216 table_modify_record(&oh, ac, av, do_add, co.do_quiet, 217 co.do_quiet, atomic); 218 break; 219 case TOK_CREATE: 220 ac--; av++; 221 table_create(&oh, ac, av); 222 break; 223 case TOK_MODIFY: 224 ac--; av++; 225 table_modify(&oh, ac, av); 226 break; 227 case TOK_DESTROY: 228 if (is_all == 0) { 229 if (table_destroy(&oh) == 0) 230 break; 231 if (errno != ESRCH) 232 err(EX_OSERR, "failed to destroy table %s", 233 tablename); 234 /* ESRCH isn't fatal, warn if not quiet mode */ 235 if (co.do_quiet == 0) 236 warn("failed to destroy table %s", tablename); 237 } else { 238 error = tables_foreach(table_destroy_one, &oh, 1); 239 if (error != 0) 240 err(EX_OSERR, 241 "failed to destroy tables list"); 242 } 243 break; 244 case TOK_FLUSH: 245 if (is_all == 0) { 246 if ((error = table_flush(&oh)) == 0) 247 break; 248 if (errno != ESRCH) 249 err(EX_OSERR, "failed to flush table %s info", 250 tablename); 251 /* ESRCH isn't fatal, warn if not quiet mode */ 252 if (co.do_quiet == 0) 253 warn("failed to flush table %s info", 254 tablename); 255 } else { 256 error = tables_foreach(table_flush_one, &oh, 1); 257 if (error != 0) 258 err(EX_OSERR, "failed to flush tables list"); 259 /* XXX: we ignore errors here */ 260 } 261 break; 262 case TOK_SWAP: 263 ac--; av++; 264 NEED1("second table name required"); 265 table_swap(&oh, *av); 266 break; 267 case TOK_LOCK: 268 case TOK_UNLOCK: 269 table_lock(&oh, (tcmd == TOK_LOCK)); 270 break; 271 case TOK_DETAIL: 272 case TOK_INFO: 273 arg = (tcmd == TOK_DETAIL) ? (void *)1 : NULL; 274 if (is_all == 0) { 275 if ((error = table_get_info(&oh, &i)) != 0) 276 err(EX_OSERR, "failed to request table info"); 277 table_show_info(&i, arg); 278 } else { 279 error = tables_foreach(table_show_info, arg, 1); 280 if (error != 0) 281 err(EX_OSERR, "failed to request tables list"); 282 } 283 break; 284 case TOK_LIST: 285 if (is_all == 0) { 286 ipfw_xtable_info i; 287 if ((error = table_get_info(&oh, &i)) != 0) 288 err(EX_OSERR, "failed to request table info"); 289 table_show_one(&i, NULL); 290 } else { 291 error = tables_foreach(table_show_one, NULL, 1); 292 if (error != 0) 293 err(EX_OSERR, "failed to request tables list"); 294 } 295 break; 296 case TOK_LOOKUP: 297 ac--; av++; 298 table_lookup(&oh, ac, av); 299 break; 300 } 301 } 302 303 void 304 table_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set, 305 uint16_t uidx) 306 { 307 308 ntlv->head.type = IPFW_TLV_TBL_NAME; 309 ntlv->head.length = sizeof(ipfw_obj_ntlv); 310 ntlv->idx = uidx; 311 ntlv->set = set; 312 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 313 } 314 315 static void 316 table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i) 317 { 318 319 oh->idx = 1; 320 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 321 } 322 323 static struct _s_x tablenewcmds[] = { 324 { "type", TOK_TYPE }, 325 { "valtype", TOK_VALTYPE }, 326 { "algo", TOK_ALGO }, 327 { "limit", TOK_LIMIT }, 328 { "locked", TOK_LOCK }, 329 { NULL, 0 } 330 }; 331 332 static struct _s_x flowtypecmds[] = { 333 { "src-ip", IPFW_TFFLAG_SRCIP }, 334 { "proto", IPFW_TFFLAG_PROTO }, 335 { "src-port", IPFW_TFFLAG_SRCPORT }, 336 { "dst-ip", IPFW_TFFLAG_DSTIP }, 337 { "dst-port", IPFW_TFFLAG_DSTPORT }, 338 { NULL, 0 } 339 }; 340 341 int 342 table_parse_type(uint8_t ttype, char *p, uint8_t *tflags) 343 { 344 uint32_t fset, fclear; 345 char *e; 346 347 /* Parse type options */ 348 switch(ttype) { 349 case IPFW_TABLE_FLOW: 350 fset = fclear = 0; 351 if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0) 352 errx(EX_USAGE, 353 "unable to parse flow option %s", e); 354 *tflags = fset; 355 break; 356 default: 357 return (EX_USAGE); 358 } 359 360 return (0); 361 } 362 363 void 364 table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags) 365 { 366 const char *tname; 367 int l; 368 369 if ((tname = match_value(tabletypes, type)) == NULL) 370 tname = "unknown"; 371 372 l = snprintf(tbuf, size, "%s", tname); 373 tbuf += l; 374 size -= l; 375 376 switch(type) { 377 case IPFW_TABLE_FLOW: 378 if (tflags != 0) { 379 *tbuf++ = ':'; 380 l--; 381 print_flags_buffer(tbuf, size, flowtypecmds, tflags); 382 } 383 break; 384 } 385 } 386 387 /* 388 * Creates new table 389 * 390 * ipfw table NAME create [ type { addr | iface | number | flow } ] 391 * [ algo algoname ] 392 */ 393 static void 394 table_create(ipfw_obj_header *oh, int ac, char *av[]) 395 { 396 ipfw_xtable_info xi; 397 int error, tcmd, val; 398 uint32_t fset, fclear; 399 char *e, *p; 400 char tbuf[128]; 401 402 memset(&xi, 0, sizeof(xi)); 403 404 while (ac > 0) { 405 tcmd = get_token(tablenewcmds, *av, "option"); 406 ac--; av++; 407 408 switch (tcmd) { 409 case TOK_LIMIT: 410 NEED1("limit value required"); 411 xi.limit = strtol(*av, NULL, 10); 412 ac--; av++; 413 break; 414 case TOK_TYPE: 415 NEED1("table type required"); 416 /* Type may have suboptions after ':' */ 417 if ((p = strchr(*av, ':')) != NULL) 418 *p++ = '\0'; 419 val = match_token(tabletypes, *av); 420 if (val == -1) { 421 concat_tokens(tbuf, sizeof(tbuf), tabletypes, 422 ", "); 423 errx(EX_USAGE, 424 "Unknown tabletype: %s. Supported: %s", 425 *av, tbuf); 426 } 427 xi.type = val; 428 if (p != NULL) { 429 error = table_parse_type(val, p, &xi.tflags); 430 if (error != 0) 431 errx(EX_USAGE, 432 "Unsupported suboptions: %s", p); 433 } 434 ac--; av++; 435 break; 436 case TOK_VALTYPE: 437 NEED1("table value type required"); 438 fset = fclear = 0; 439 val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear); 440 if (val != -1) { 441 xi.vmask = fset; 442 ac--; av++; 443 break; 444 } 445 concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", "); 446 errx(EX_USAGE, "Unknown value type: %s. Supported: %s", 447 e, tbuf); 448 break; 449 case TOK_ALGO: 450 NEED1("table algorithm name required"); 451 if (strlen(*av) > sizeof(xi.algoname)) 452 errx(EX_USAGE, "algorithm name too long"); 453 strlcpy(xi.algoname, *av, sizeof(xi.algoname)); 454 ac--; av++; 455 break; 456 case TOK_LOCK: 457 xi.flags |= IPFW_TGFLAGS_LOCKED; 458 break; 459 } 460 } 461 462 /* Set some defaults to preserve compatibility. */ 463 if (xi.algoname[0] == '\0' && xi.type == 0) 464 xi.type = IPFW_TABLE_ADDR; 465 if (xi.vmask == 0) 466 xi.vmask = IPFW_VTYPE_LEGACY; 467 468 if ((error = table_do_create(oh, &xi)) != 0) 469 err(EX_OSERR, "Table creation failed"); 470 } 471 472 /* 473 * Creates new table 474 * 475 * Request: [ ipfw_obj_header ipfw_xtable_info ] 476 * 477 * Returns 0 on success. 478 */ 479 static int 480 table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i) 481 { 482 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 483 int error; 484 485 memcpy(tbuf, oh, sizeof(*oh)); 486 memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); 487 oh = (ipfw_obj_header *)tbuf; 488 489 error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf)); 490 491 return (error); 492 } 493 494 /* 495 * Modifies existing table 496 * 497 * ipfw table NAME modify [ limit number ] 498 */ 499 static void 500 table_modify(ipfw_obj_header *oh, int ac, char *av[]) 501 { 502 ipfw_xtable_info xi; 503 int tcmd; 504 505 memset(&xi, 0, sizeof(xi)); 506 507 while (ac > 0) { 508 tcmd = get_token(tablenewcmds, *av, "option"); 509 ac--; av++; 510 511 switch (tcmd) { 512 case TOK_LIMIT: 513 NEED1("limit value required"); 514 xi.limit = strtol(*av, NULL, 10); 515 xi.mflags |= IPFW_TMFLAGS_LIMIT; 516 ac--; av++; 517 break; 518 default: 519 errx(EX_USAGE, "cmd is not supported for modificatiob"); 520 } 521 } 522 523 if (table_do_modify(oh, &xi) != 0) 524 err(EX_OSERR, "Table modification failed"); 525 } 526 527 /* 528 * Modifies existing table. 529 * 530 * Request: [ ipfw_obj_header ipfw_xtable_info ] 531 * 532 * Returns 0 on success. 533 */ 534 static int 535 table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i) 536 { 537 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 538 int error; 539 540 memcpy(tbuf, oh, sizeof(*oh)); 541 memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); 542 oh = (ipfw_obj_header *)tbuf; 543 544 error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf)); 545 546 return (error); 547 } 548 549 /* 550 * Locks or unlocks given table 551 */ 552 static void 553 table_lock(ipfw_obj_header *oh, int lock) 554 { 555 ipfw_xtable_info xi; 556 557 memset(&xi, 0, sizeof(xi)); 558 559 xi.mflags |= IPFW_TMFLAGS_LOCK; 560 xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0; 561 562 if (table_do_modify(oh, &xi) != 0) 563 err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock"); 564 } 565 566 /* 567 * Destroys given table specified by @oh->ntlv. 568 * Returns 0 on success. 569 */ 570 static int 571 table_destroy(ipfw_obj_header *oh) 572 { 573 574 if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0) 575 return (-1); 576 577 return (0); 578 } 579 580 static int 581 table_destroy_one(ipfw_xtable_info *i, void *arg) 582 { 583 ipfw_obj_header *oh; 584 585 oh = (ipfw_obj_header *)arg; 586 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 587 if (table_destroy(oh) != 0) { 588 if (co.do_quiet == 0) 589 warn("failed to destroy table(%s) in set %u", 590 i->tablename, i->set); 591 return (-1); 592 } 593 return (0); 594 } 595 596 /* 597 * Flushes given table specified by @oh->ntlv. 598 * Returns 0 on success. 599 */ 600 static int 601 table_flush(ipfw_obj_header *oh) 602 { 603 604 if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0) 605 return (-1); 606 607 return (0); 608 } 609 610 static int 611 table_do_swap(ipfw_obj_header *oh, char *second) 612 { 613 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)]; 614 int error; 615 616 memset(tbuf, 0, sizeof(tbuf)); 617 memcpy(tbuf, oh, sizeof(*oh)); 618 oh = (ipfw_obj_header *)tbuf; 619 table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1); 620 621 error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf)); 622 623 return (error); 624 } 625 626 /* 627 * Swaps given table with @second one. 628 */ 629 static int 630 table_swap(ipfw_obj_header *oh, char *second) 631 { 632 633 if (table_check_name(second) != 0) 634 errx(EX_USAGE, "table name %s is invalid", second); 635 636 if (table_do_swap(oh, second) == 0) 637 return (0); 638 639 switch (errno) { 640 case EINVAL: 641 errx(EX_USAGE, "Unable to swap table: check types"); 642 case EFBIG: 643 errx(EX_USAGE, "Unable to swap table: check limits"); 644 } 645 646 return (0); 647 } 648 649 650 /* 651 * Retrieves table in given table specified by @oh->ntlv. 652 * it inside @i. 653 * Returns 0 on success. 654 */ 655 static int 656 table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i) 657 { 658 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 659 size_t sz; 660 661 sz = sizeof(tbuf); 662 memset(tbuf, 0, sizeof(tbuf)); 663 memcpy(tbuf, oh, sizeof(*oh)); 664 oh = (ipfw_obj_header *)tbuf; 665 666 if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0) 667 return (errno); 668 669 if (sz < sizeof(tbuf)) 670 return (EINVAL); 671 672 *i = *(ipfw_xtable_info *)(oh + 1); 673 674 return (0); 675 } 676 677 static struct _s_x tablealgoclass[] = { 678 { "hash", IPFW_TACLASS_HASH }, 679 { "array", IPFW_TACLASS_ARRAY }, 680 { "radix", IPFW_TACLASS_RADIX }, 681 { NULL, 0 } 682 }; 683 684 struct ta_cldata { 685 uint8_t taclass; 686 uint8_t spare4; 687 uint16_t itemsize; 688 uint16_t itemsize6; 689 uint32_t size; 690 uint32_t count; 691 }; 692 693 /* 694 * Print global/per-AF table @i algorithm info. 695 */ 696 static void 697 table_show_tainfo(ipfw_xtable_info *i, struct ta_cldata *d, 698 const char *af, const char *taclass) 699 { 700 701 switch (d->taclass) { 702 case IPFW_TACLASS_HASH: 703 case IPFW_TACLASS_ARRAY: 704 printf(" %salgorithm %s info\n", af, taclass); 705 if (d->itemsize == d->itemsize6) 706 printf(" size: %u items: %u itemsize: %u\n", 707 d->size, d->count, d->itemsize); 708 else 709 printf(" size: %u items: %u " 710 "itemsize4: %u itemsize6: %u\n", 711 d->size, d->count, 712 d->itemsize, d->itemsize6); 713 break; 714 case IPFW_TACLASS_RADIX: 715 printf(" %salgorithm %s info\n", af, taclass); 716 if (d->itemsize == d->itemsize6) 717 printf(" items: %u itemsize: %u\n", 718 d->count, d->itemsize); 719 else 720 printf(" items: %u " 721 "itemsize4: %u itemsize6: %u\n", 722 d->count, d->itemsize, d->itemsize6); 723 break; 724 default: 725 printf(" algo class: %s\n", taclass); 726 } 727 } 728 729 static void 730 table_print_valheader(char *buf, size_t bufsize, uint32_t vmask) 731 { 732 733 if (vmask == IPFW_VTYPE_LEGACY) { 734 snprintf(buf, bufsize, "legacy"); 735 return; 736 } 737 738 memset(buf, 0, bufsize); 739 print_flags_buffer(buf, bufsize, tablevaltypes, vmask); 740 } 741 742 /* 743 * Prints table info struct @i in human-readable form. 744 */ 745 static int 746 table_show_info(ipfw_xtable_info *i, void *arg) 747 { 748 const char *vtype; 749 ipfw_ta_tinfo *tainfo; 750 int afdata, afitem; 751 struct ta_cldata d; 752 char ttype[64], tvtype[64]; 753 754 table_print_type(ttype, sizeof(ttype), i->type, i->tflags); 755 table_print_valheader(tvtype, sizeof(tvtype), i->vmask); 756 757 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 758 if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0) 759 printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype); 760 else 761 printf(" kindex: %d, type: %s\n", i->kidx, ttype); 762 printf(" references: %u, valtype: %s\n", i->refcnt, tvtype); 763 printf(" algorithm: %s\n", i->algoname); 764 printf(" items: %u, size: %u\n", i->count, i->size); 765 if (i->limit > 0) 766 printf(" limit: %u\n", i->limit); 767 768 /* Print algo-specific info if requested & set */ 769 if (arg == NULL) 770 return (0); 771 772 if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0) 773 return (0); 774 tainfo = &i->ta_info; 775 776 afdata = 0; 777 afitem = 0; 778 if (tainfo->flags & IPFW_TATFLAGS_AFDATA) 779 afdata = 1; 780 if (tainfo->flags & IPFW_TATFLAGS_AFITEM) 781 afitem = 1; 782 783 memset(&d, 0, sizeof(d)); 784 d.taclass = tainfo->taclass4; 785 d.size = tainfo->size4; 786 d.count = tainfo->count4; 787 d.itemsize = tainfo->itemsize4; 788 if (afdata == 0 && afitem != 0) 789 d.itemsize6 = tainfo->itemsize6; 790 else 791 d.itemsize6 = d.itemsize; 792 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 793 vtype = "unknown"; 794 795 if (afdata == 0) { 796 table_show_tainfo(i, &d, "", vtype); 797 } else { 798 table_show_tainfo(i, &d, "IPv4 ", vtype); 799 memset(&d, 0, sizeof(d)); 800 d.taclass = tainfo->taclass6; 801 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 802 vtype = "unknown"; 803 d.size = tainfo->size6; 804 d.count = tainfo->count6; 805 d.itemsize = tainfo->itemsize6; 806 d.itemsize6 = d.itemsize; 807 table_show_tainfo(i, &d, "IPv6 ", vtype); 808 } 809 810 return (0); 811 } 812 813 814 /* 815 * Function wrappers which can be used either 816 * as is or as foreach function parameter. 817 */ 818 819 static int 820 table_show_one(ipfw_xtable_info *i, void *arg) 821 { 822 ipfw_obj_header *oh; 823 int error; 824 825 if ((error = table_do_get_list(i, &oh)) != 0) { 826 err(EX_OSERR, "Error requesting table %s list", i->tablename); 827 return (error); 828 } 829 830 table_show_list(oh, 1); 831 832 free(oh); 833 return (0); 834 } 835 836 static int 837 table_flush_one(ipfw_xtable_info *i, void *arg) 838 { 839 ipfw_obj_header *oh; 840 841 oh = (ipfw_obj_header *)arg; 842 843 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 844 845 return (table_flush(oh)); 846 } 847 848 static int 849 table_do_modify_record(int cmd, ipfw_obj_header *oh, 850 ipfw_obj_tentry *tent, int count, int atomic) 851 { 852 ipfw_obj_ctlv *ctlv; 853 ipfw_obj_tentry *tent_base; 854 caddr_t pbuf; 855 char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)]; 856 int error, i; 857 size_t sz; 858 859 sz = sizeof(*ctlv) + sizeof(*tent) * count; 860 if (count == 1) { 861 memset(xbuf, 0, sizeof(xbuf)); 862 pbuf = xbuf; 863 } else { 864 if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL) 865 return (ENOMEM); 866 } 867 868 memcpy(pbuf, oh, sizeof(*oh)); 869 oh = (ipfw_obj_header *)pbuf; 870 oh->opheader.version = 1; 871 872 ctlv = (ipfw_obj_ctlv *)(oh + 1); 873 ctlv->count = count; 874 ctlv->head.length = sz; 875 if (atomic != 0) 876 ctlv->flags |= IPFW_CTF_ATOMIC; 877 878 tent_base = tent; 879 memcpy(ctlv + 1, tent, sizeof(*tent) * count); 880 tent = (ipfw_obj_tentry *)(ctlv + 1); 881 for (i = 0; i < count; i++, tent++) { 882 tent->head.length = sizeof(ipfw_obj_tentry); 883 tent->idx = oh->idx; 884 } 885 886 sz += sizeof(*oh); 887 error = do_get3(cmd, &oh->opheader, &sz); 888 tent = (ipfw_obj_tentry *)(ctlv + 1); 889 /* Copy result back to provided buffer */ 890 memcpy(tent_base, ctlv + 1, sizeof(*tent) * count); 891 892 if (pbuf != xbuf) 893 free(pbuf); 894 895 return (error); 896 } 897 898 static void 899 table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, 900 int quiet, int update, int atomic) 901 { 902 ipfw_obj_tentry *ptent, tent, *tent_buf; 903 ipfw_xtable_info xi; 904 uint8_t type; 905 uint32_t vmask; 906 int cmd, count, error, i, ignored; 907 char *texterr, *etxt, *px; 908 909 if (ac == 0) 910 errx(EX_USAGE, "address required"); 911 912 if (add != 0) { 913 cmd = IP_FW_TABLE_XADD; 914 texterr = "Adding record failed"; 915 } else { 916 cmd = IP_FW_TABLE_XDEL; 917 texterr = "Deleting record failed"; 918 } 919 920 /* 921 * Calculate number of entries: 922 * Assume [key val] x N for add 923 * and 924 * key x N for delete 925 */ 926 count = (add != 0) ? ac / 2 + 1 : ac; 927 928 if (count <= 1) { 929 /* Adding single entry with/without value */ 930 memset(&tent, 0, sizeof(tent)); 931 tent_buf = &tent; 932 } else { 933 934 if ((tent_buf = calloc(count, sizeof(tent))) == NULL) 935 errx(EX_OSERR, 936 "Unable to allocate memory for all entries"); 937 } 938 ptent = tent_buf; 939 940 memset(&xi, 0, sizeof(xi)); 941 count = 0; 942 while (ac > 0) { 943 tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi); 944 945 /* 946 * Compatibility layer: auto-create table if not exists. 947 */ 948 if (xi.tablename[0] == '\0') { 949 xi.type = type; 950 xi.vmask = vmask; 951 strlcpy(xi.tablename, oh->ntlv.name, 952 sizeof(xi.tablename)); 953 if (quiet == 0) 954 warnx("DEPRECATED: inserting data into " 955 "non-existent table %s. (auto-created)", 956 xi.tablename); 957 table_do_create(oh, &xi); 958 } 959 960 oh->ntlv.type = type; 961 ac--; av++; 962 963 if (add != 0 && ac > 0) { 964 tentry_fill_value(oh, ptent, *av, type, vmask); 965 ac--; av++; 966 } 967 968 if (update != 0) 969 ptent->head.flags |= IPFW_TF_UPDATE; 970 971 count++; 972 ptent++; 973 } 974 975 error = table_do_modify_record(cmd, oh, tent_buf, count, atomic); 976 977 /* 978 * Compatibility stuff: do not yell on duplicate keys or 979 * failed deletions. 980 */ 981 if (error == 0 || (error == EEXIST && add != 0) || 982 (error == ENOENT && add == 0)) { 983 if (quiet != 0) { 984 if (tent_buf != &tent) 985 free(tent_buf); 986 return; 987 } 988 } 989 990 /* Report results back */ 991 ptent = tent_buf; 992 for (i = 0; i < count; ptent++, i++) { 993 ignored = 0; 994 switch (ptent->result) { 995 case IPFW_TR_ADDED: 996 px = "added"; 997 break; 998 case IPFW_TR_DELETED: 999 px = "deleted"; 1000 break; 1001 case IPFW_TR_UPDATED: 1002 px = "updated"; 1003 break; 1004 case IPFW_TR_LIMIT: 1005 px = "limit"; 1006 ignored = 1; 1007 break; 1008 case IPFW_TR_ERROR: 1009 px = "error"; 1010 ignored = 1; 1011 break; 1012 case IPFW_TR_NOTFOUND: 1013 px = "notfound"; 1014 ignored = 1; 1015 break; 1016 case IPFW_TR_EXISTS: 1017 px = "exists"; 1018 ignored = 1; 1019 break; 1020 case IPFW_TR_IGNORED: 1021 px = "ignored"; 1022 ignored = 1; 1023 break; 1024 default: 1025 px = "unknown"; 1026 ignored = 1; 1027 } 1028 1029 if (error != 0 && atomic != 0 && ignored == 0) 1030 printf("%s(reverted): ", px); 1031 else 1032 printf("%s: ", px); 1033 1034 table_show_entry(&xi, ptent); 1035 } 1036 1037 if (tent_buf != &tent) 1038 free(tent_buf); 1039 1040 if (error == 0) 1041 return; 1042 /* Get real OS error */ 1043 error = errno; 1044 1045 /* Try to provide more human-readable error */ 1046 switch (error) { 1047 case EEXIST: 1048 etxt = "record already exists"; 1049 break; 1050 case EFBIG: 1051 etxt = "limit hit"; 1052 break; 1053 case ESRCH: 1054 etxt = "table not found"; 1055 break; 1056 case ENOENT: 1057 etxt = "record not found"; 1058 break; 1059 case EACCES: 1060 etxt = "table is locked"; 1061 break; 1062 default: 1063 etxt = strerror(error); 1064 } 1065 1066 errx(EX_OSERR, "%s: %s", texterr, etxt); 1067 } 1068 1069 static int 1070 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi, 1071 ipfw_obj_tentry *xtent) 1072 { 1073 char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)]; 1074 ipfw_obj_tentry *tent; 1075 uint8_t type; 1076 uint32_t vmask; 1077 size_t sz; 1078 1079 memcpy(xbuf, oh, sizeof(*oh)); 1080 oh = (ipfw_obj_header *)xbuf; 1081 tent = (ipfw_obj_tentry *)(oh + 1); 1082 1083 memset(tent, 0, sizeof(*tent)); 1084 tent->head.length = sizeof(*tent); 1085 tent->idx = 1; 1086 1087 tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi); 1088 oh->ntlv.type = type; 1089 1090 sz = sizeof(xbuf); 1091 if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0) 1092 return (errno); 1093 1094 if (sz < sizeof(xbuf)) 1095 return (EINVAL); 1096 1097 *xtent = *tent; 1098 1099 return (0); 1100 } 1101 1102 static void 1103 table_lookup(ipfw_obj_header *oh, int ac, char *av[]) 1104 { 1105 ipfw_obj_tentry xtent; 1106 ipfw_xtable_info xi; 1107 char key[64]; 1108 int error; 1109 1110 if (ac == 0) 1111 errx(EX_USAGE, "address required"); 1112 1113 strlcpy(key, *av, sizeof(key)); 1114 1115 memset(&xi, 0, sizeof(xi)); 1116 error = table_do_lookup(oh, key, &xi, &xtent); 1117 1118 switch (error) { 1119 case 0: 1120 break; 1121 case ESRCH: 1122 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name); 1123 case ENOENT: 1124 errx(EX_UNAVAILABLE, "Entry %s not found", *av); 1125 case ENOTSUP: 1126 errx(EX_UNAVAILABLE, "Table %s algo does not support " 1127 "\"lookup\" method", oh->ntlv.name); 1128 default: 1129 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)"); 1130 } 1131 1132 table_show_entry(&xi, &xtent); 1133 } 1134 1135 static void 1136 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type, 1137 uint8_t tflags) 1138 { 1139 char *p, *pp; 1140 int mask, af; 1141 struct in6_addr *paddr, tmp; 1142 struct tflow_entry *tfe; 1143 uint32_t key, *pkey; 1144 uint16_t port; 1145 struct protoent *pent; 1146 struct servent *sent; 1147 int masklen; 1148 1149 masklen = 0; 1150 af = 0; 1151 paddr = (struct in6_addr *)&tentry->k; 1152 1153 switch (type) { 1154 case IPFW_TABLE_ADDR: 1155 /* Remove / if exists */ 1156 if ((p = strchr(arg, '/')) != NULL) { 1157 *p = '\0'; 1158 mask = atoi(p + 1); 1159 } 1160 1161 if (inet_pton(AF_INET, arg, paddr) == 1) { 1162 if (p != NULL && mask > 32) 1163 errx(EX_DATAERR, "bad IPv4 mask width: %s", 1164 p + 1); 1165 1166 masklen = p ? mask : 32; 1167 af = AF_INET; 1168 } else if (inet_pton(AF_INET6, arg, paddr) == 1) { 1169 if (IN6_IS_ADDR_V4COMPAT(paddr)) 1170 errx(EX_DATAERR, 1171 "Use IPv4 instead of v4-compatible"); 1172 if (p != NULL && mask > 128) 1173 errx(EX_DATAERR, "bad IPv6 mask width: %s", 1174 p + 1); 1175 1176 masklen = p ? mask : 128; 1177 af = AF_INET6; 1178 } else { 1179 /* Assume FQDN */ 1180 if (lookup_host(arg, (struct in_addr *)paddr) != 0) 1181 errx(EX_NOHOST, "hostname ``%s'' unknown", arg); 1182 1183 masklen = 32; 1184 type = IPFW_TABLE_ADDR; 1185 af = AF_INET; 1186 } 1187 break; 1188 case IPFW_TABLE_INTERFACE: 1189 /* Assume interface name. Copy significant data only */ 1190 mask = MIN(strlen(arg), IF_NAMESIZE - 1); 1191 memcpy(paddr, arg, mask); 1192 /* Set mask to exact match */ 1193 masklen = 8 * IF_NAMESIZE; 1194 break; 1195 case IPFW_TABLE_NUMBER: 1196 /* Port or any other key */ 1197 key = strtol(arg, &p, 10); 1198 if (*p != '\0') 1199 errx(EX_DATAERR, "Invalid number: %s", arg); 1200 1201 pkey = (uint32_t *)paddr; 1202 *pkey = key; 1203 masklen = 32; 1204 break; 1205 case IPFW_TABLE_FLOW: 1206 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */ 1207 tfe = &tentry->k.flow; 1208 af = 0; 1209 1210 /* Handle <ipv4|ipv6> */ 1211 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) { 1212 if ((p = strchr(arg, ',')) != NULL) 1213 *p++ = '\0'; 1214 /* Determine family using temporary storage */ 1215 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1216 if (af != 0 && af != AF_INET) 1217 errx(EX_DATAERR, 1218 "Inconsistent address family\n"); 1219 af = AF_INET; 1220 memcpy(&tfe->a.a4.sip, &tmp, 4); 1221 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1222 if (af != 0 && af != AF_INET6) 1223 errx(EX_DATAERR, 1224 "Inconsistent address family\n"); 1225 af = AF_INET6; 1226 memcpy(&tfe->a.a6.sip6, &tmp, 16); 1227 } 1228 1229 arg = p; 1230 } 1231 1232 /* Handle <proto-num|proto-name> */ 1233 if ((tflags & IPFW_TFFLAG_PROTO) != 0) { 1234 if (arg == NULL) 1235 errx(EX_DATAERR, "invalid key: proto missing"); 1236 if ((p = strchr(arg, ',')) != NULL) 1237 *p++ = '\0'; 1238 1239 key = strtol(arg, &pp, 10); 1240 if (*pp != '\0') { 1241 if ((pent = getprotobyname(arg)) == NULL) 1242 errx(EX_DATAERR, "Unknown proto: %s", 1243 arg); 1244 else 1245 key = pent->p_proto; 1246 } 1247 1248 if (key > 255) 1249 errx(EX_DATAERR, "Bad protocol number: %u",key); 1250 1251 tfe->proto = key; 1252 1253 arg = p; 1254 } 1255 1256 /* Handle <port-num|service-name> */ 1257 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1258 if (arg == NULL) 1259 errx(EX_DATAERR, "invalid key: src port missing"); 1260 if ((p = strchr(arg, ',')) != NULL) 1261 *p++ = '\0'; 1262 1263 port = htons(strtol(arg, &pp, 10)); 1264 if (*pp != '\0') { 1265 if ((sent = getservbyname(arg, NULL)) == NULL) 1266 errx(EX_DATAERR, "Unknown service: %s", 1267 arg); 1268 port = sent->s_port; 1269 } 1270 tfe->sport = port; 1271 arg = p; 1272 } 1273 1274 /* Handle <ipv4|ipv6>*/ 1275 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) { 1276 if (arg == NULL) 1277 errx(EX_DATAERR, "invalid key: dst ip missing"); 1278 if ((p = strchr(arg, ',')) != NULL) 1279 *p++ = '\0'; 1280 /* Determine family using temporary storage */ 1281 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1282 if (af != 0 && af != AF_INET) 1283 errx(EX_DATAERR, 1284 "Inconsistent address family"); 1285 af = AF_INET; 1286 memcpy(&tfe->a.a4.dip, &tmp, 4); 1287 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1288 if (af != 0 && af != AF_INET6) 1289 errx(EX_DATAERR, 1290 "Inconsistent address family"); 1291 af = AF_INET6; 1292 memcpy(&tfe->a.a6.dip6, &tmp, 16); 1293 } 1294 1295 arg = p; 1296 } 1297 1298 /* Handle <port-num|service-name> */ 1299 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1300 if (arg == NULL) 1301 errx(EX_DATAERR, "invalid key: dst port missing"); 1302 if ((p = strchr(arg, ',')) != NULL) 1303 *p++ = '\0'; 1304 1305 port = htons(strtol(arg, &pp, 10)); 1306 if (*pp != '\0') { 1307 if ((sent = getservbyname(arg, NULL)) == NULL) 1308 errx(EX_DATAERR, "Unknown service: %s", 1309 arg); 1310 port = sent->s_port; 1311 } 1312 tfe->dport = port; 1313 arg = p; 1314 } 1315 1316 tfe->af = af; 1317 1318 break; 1319 1320 default: 1321 errx(EX_DATAERR, "Unsupported table type: %d", type); 1322 } 1323 1324 tentry->subtype = af; 1325 tentry->masklen = masklen; 1326 } 1327 1328 /* 1329 * Tries to guess table key type. 1330 * This procedure is used in legacy table auto-create 1331 * code AND in `ipfw -n` ruleset checking. 1332 * 1333 * Imported from old table_fill_xentry() parse code. 1334 */ 1335 static int 1336 guess_key_type(char *key, uint8_t *ptype) 1337 { 1338 char *p; 1339 struct in6_addr addr; 1340 uint32_t kv; 1341 1342 if (ishexnumber(*key) != 0 || *key == ':') { 1343 /* Remove / if exists */ 1344 if ((p = strchr(key, '/')) != NULL) 1345 *p = '\0'; 1346 1347 if ((inet_pton(AF_INET, key, &addr) == 1) || 1348 (inet_pton(AF_INET6, key, &addr) == 1)) { 1349 *ptype = IPFW_TABLE_CIDR; 1350 if (p != NULL) 1351 *p = '/'; 1352 return (0); 1353 } else { 1354 /* Port or any other key */ 1355 /* Skip non-base 10 entries like 'fa1' */ 1356 kv = strtol(key, &p, 10); 1357 if (*p == '\0') { 1358 *ptype = IPFW_TABLE_NUMBER; 1359 return (0); 1360 } else if ((p != key) && (*p == '.')) { 1361 /* 1362 * Warn on IPv4 address strings 1363 * which are "valid" for inet_aton() but not 1364 * in inet_pton(). 1365 * 1366 * Typical examples: '10.5' or '10.0.0.05' 1367 */ 1368 return (1); 1369 } 1370 } 1371 } 1372 1373 if (strchr(key, '.') == NULL) { 1374 *ptype = IPFW_TABLE_INTERFACE; 1375 return (0); 1376 } 1377 1378 if (lookup_host(key, (struct in_addr *)&addr) != 0) 1379 return (1); 1380 1381 *ptype = IPFW_TABLE_CIDR; 1382 return (0); 1383 } 1384 1385 static void 1386 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key, 1387 int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi) 1388 { 1389 uint8_t type, tflags; 1390 uint32_t vmask; 1391 int error; 1392 1393 type = 0; 1394 tflags = 0; 1395 vmask = 0; 1396 1397 if (xi->tablename[0] == '\0') 1398 error = table_get_info(oh, xi); 1399 else 1400 error = 0; 1401 1402 if (error == 0) { 1403 if (co.test_only == 0) { 1404 /* Table found */ 1405 type = xi->type; 1406 tflags = xi->tflags; 1407 vmask = xi->vmask; 1408 } else { 1409 /* 1410 * We're running `ipfw -n` 1411 * Compatibility layer: try to guess key type 1412 * before failing. 1413 */ 1414 if (guess_key_type(key, &type) != 0) { 1415 /* Inknown key */ 1416 errx(EX_USAGE, "Cannot guess " 1417 "key '%s' type", key); 1418 } 1419 vmask = IPFW_VTYPE_LEGACY; 1420 } 1421 } else { 1422 if (error != ESRCH) 1423 errx(EX_OSERR, "Error requesting table %s info", 1424 oh->ntlv.name); 1425 if (add == 0) 1426 errx(EX_DATAERR, "Table %s does not exist", 1427 oh->ntlv.name); 1428 /* 1429 * Table does not exist 1430 * Compatibility layer: try to guess key type before failing. 1431 */ 1432 if (guess_key_type(key, &type) != 0) { 1433 /* Inknown key */ 1434 errx(EX_USAGE, "Table %s does not exist, cannot guess " 1435 "key '%s' type", oh->ntlv.name, key); 1436 } 1437 1438 vmask = IPFW_VTYPE_LEGACY; 1439 } 1440 1441 tentry_fill_key_type(key, tent, type, tflags); 1442 1443 *ptype = type; 1444 *pvmask = vmask; 1445 } 1446 1447 static void 1448 set_legacy_value(uint32_t val, ipfw_table_value *v) 1449 { 1450 v->tag = val; 1451 v->pipe = val; 1452 v->divert = val; 1453 v->skipto = val; 1454 v->netgraph = val; 1455 v->fib = val; 1456 v->nat = val; 1457 v->nh4 = val; 1458 v->dscp = (uint8_t)val; 1459 v->limit = val; 1460 } 1461 1462 static void 1463 tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg, 1464 uint8_t type, uint32_t vmask) 1465 { 1466 struct addrinfo hints, *res; 1467 uint32_t a4, flag, val; 1468 ipfw_table_value *v; 1469 uint32_t i; 1470 int dval; 1471 char *comma, *e, *etype, *n, *p; 1472 1473 v = &tent->v.value; 1474 1475 /* Compat layer: keep old behavior for legacy value types */ 1476 if (vmask == IPFW_VTYPE_LEGACY) { 1477 /* Try to interpret as number first */ 1478 val = strtoul(arg, &p, 0); 1479 if (*p == '\0') { 1480 set_legacy_value(val, v); 1481 return; 1482 } 1483 if (inet_pton(AF_INET, arg, &val) == 1) { 1484 set_legacy_value(ntohl(val), v); 1485 return; 1486 } 1487 /* Try hostname */ 1488 if (lookup_host(arg, (struct in_addr *)&val) == 0) { 1489 set_legacy_value(val, v); 1490 return; 1491 } 1492 errx(EX_OSERR, "Unable to parse value %s", arg); 1493 } 1494 1495 /* 1496 * Shorthands: handle single value if vmask consists 1497 * of numbers only. e.g.: 1498 * vmask = "fib,skipto" -> treat input "1" as "1,1" 1499 */ 1500 1501 n = arg; 1502 etype = NULL; 1503 for (i = 1; i < (1 << 31); i *= 2) { 1504 if ((flag = (vmask & i)) == 0) 1505 continue; 1506 vmask &= ~flag; 1507 1508 if ((comma = strchr(n, ',')) != NULL) 1509 *comma = '\0'; 1510 1511 switch (flag) { 1512 case IPFW_VTYPE_TAG: 1513 v->tag = strtol(n, &e, 10); 1514 if (*e != '\0') 1515 etype = "tag"; 1516 break; 1517 case IPFW_VTYPE_PIPE: 1518 v->pipe = strtol(n, &e, 10); 1519 if (*e != '\0') 1520 etype = "pipe"; 1521 break; 1522 case IPFW_VTYPE_DIVERT: 1523 v->divert = strtol(n, &e, 10); 1524 if (*e != '\0') 1525 etype = "divert"; 1526 break; 1527 case IPFW_VTYPE_SKIPTO: 1528 v->skipto = strtol(n, &e, 10); 1529 if (*e != '\0') 1530 etype = "skipto"; 1531 break; 1532 case IPFW_VTYPE_NETGRAPH: 1533 v->netgraph = strtol(n, &e, 10); 1534 if (*e != '\0') 1535 etype = "netgraph"; 1536 break; 1537 case IPFW_VTYPE_FIB: 1538 v->fib = strtol(n, &e, 10); 1539 if (*e != '\0') 1540 etype = "fib"; 1541 break; 1542 case IPFW_VTYPE_NAT: 1543 v->nat = strtol(n, &e, 10); 1544 if (*e != '\0') 1545 etype = "nat"; 1546 break; 1547 case IPFW_VTYPE_LIMIT: 1548 v->limit = strtol(n, &e, 10); 1549 if (*e != '\0') 1550 etype = "limit"; 1551 break; 1552 case IPFW_VTYPE_NH4: 1553 if (strchr(n, '.') != NULL && 1554 inet_pton(AF_INET, n, &a4) == 1) { 1555 v->nh4 = ntohl(a4); 1556 break; 1557 } 1558 if (lookup_host(n, (struct in_addr *)&v->nh4) == 0) 1559 break; 1560 etype = "ipv4"; 1561 break; 1562 case IPFW_VTYPE_DSCP: 1563 if (isalpha(*n)) { 1564 if ((dval = match_token(f_ipdscp, n)) != -1) { 1565 v->dscp = dval; 1566 break; 1567 } else 1568 etype = "DSCP code"; 1569 } else { 1570 v->dscp = strtol(n, &e, 10); 1571 if (v->dscp > 63 || *e != '\0') 1572 etype = "DSCP value"; 1573 } 1574 break; 1575 case IPFW_VTYPE_NH6: 1576 if (strchr(n, ':') != NULL) { 1577 memset(&hints, 0, sizeof(hints)); 1578 hints.ai_family = AF_INET6; 1579 hints.ai_flags = AI_NUMERICHOST; 1580 if (getaddrinfo(n, NULL, &hints, &res) == 0) { 1581 v->nh6 = ((struct sockaddr_in6 *) 1582 res->ai_addr)->sin6_addr; 1583 v->zoneid = ((struct sockaddr_in6 *) 1584 res->ai_addr)->sin6_scope_id; 1585 freeaddrinfo(res); 1586 break; 1587 } 1588 } 1589 etype = "ipv6"; 1590 break; 1591 } 1592 1593 if (etype != NULL) 1594 errx(EX_USAGE, "Unable to parse %s as %s", n, etype); 1595 1596 if (comma != NULL) 1597 *comma++ = ','; 1598 1599 if ((n = comma) != NULL) 1600 continue; 1601 1602 /* End of input. */ 1603 if (vmask != 0) 1604 errx(EX_USAGE, "Not enough fields inside value"); 1605 } 1606 } 1607 1608 /* 1609 * Compare table names. 1610 * Honor number comparison. 1611 */ 1612 static int 1613 tablename_cmp(const void *a, const void *b) 1614 { 1615 ipfw_xtable_info *ia, *ib; 1616 1617 ia = (ipfw_xtable_info *)a; 1618 ib = (ipfw_xtable_info *)b; 1619 1620 return (stringnum_cmp(ia->tablename, ib->tablename)); 1621 } 1622 1623 /* 1624 * Retrieves table list from kernel, 1625 * optionally sorts it and calls requested function for each table. 1626 * Returns 0 on success. 1627 */ 1628 static int 1629 tables_foreach(table_cb_t *f, void *arg, int sort) 1630 { 1631 ipfw_obj_lheader *olh; 1632 ipfw_xtable_info *info; 1633 size_t sz; 1634 int i, error; 1635 1636 /* Start with reasonable default */ 1637 sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info); 1638 1639 for (;;) { 1640 if ((olh = calloc(1, sz)) == NULL) 1641 return (ENOMEM); 1642 1643 olh->size = sz; 1644 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) { 1645 sz = olh->size; 1646 free(olh); 1647 if (errno != ENOMEM) 1648 return (errno); 1649 continue; 1650 } 1651 1652 if (sort != 0) 1653 qsort(olh + 1, olh->count, olh->objsize, 1654 tablename_cmp); 1655 1656 info = (ipfw_xtable_info *)(olh + 1); 1657 for (i = 0; i < olh->count; i++) { 1658 if (co.use_set == 0 || info->set == co.use_set - 1) 1659 error = f(info, arg); 1660 info = (ipfw_xtable_info *)((caddr_t)info + 1661 olh->objsize); 1662 } 1663 free(olh); 1664 break; 1665 } 1666 return (0); 1667 } 1668 1669 1670 /* 1671 * Retrieves all entries for given table @i in 1672 * eXtended format. Allocate buffer large enough 1673 * to store result. Called needs to free it later. 1674 * 1675 * Returns 0 on success. 1676 */ 1677 static int 1678 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh) 1679 { 1680 ipfw_obj_header *oh; 1681 size_t sz; 1682 int c; 1683 1684 sz = 0; 1685 oh = NULL; 1686 for (c = 0; c < 8; c++) { 1687 if (sz < i->size) 1688 sz = i->size + 44; 1689 if (oh != NULL) 1690 free(oh); 1691 if ((oh = calloc(1, sz)) == NULL) 1692 continue; 1693 table_fill_objheader(oh, i); 1694 oh->opheader.version = 1; /* Current version */ 1695 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) { 1696 *poh = oh; 1697 return (0); 1698 } 1699 1700 if (errno != ENOMEM) 1701 break; 1702 } 1703 free(oh); 1704 1705 return (errno); 1706 } 1707 1708 /* 1709 * Shows all entries from @oh in human-readable format 1710 */ 1711 static void 1712 table_show_list(ipfw_obj_header *oh, int need_header) 1713 { 1714 ipfw_obj_tentry *tent; 1715 uint32_t count; 1716 ipfw_xtable_info *i; 1717 1718 i = (ipfw_xtable_info *)(oh + 1); 1719 tent = (ipfw_obj_tentry *)(i + 1); 1720 1721 if (need_header) 1722 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 1723 1724 count = i->count; 1725 while (count > 0) { 1726 table_show_entry(i, tent); 1727 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length); 1728 count--; 1729 } 1730 } 1731 1732 static void 1733 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, 1734 uint32_t vmask, int print_ip) 1735 { 1736 char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1737 struct sockaddr_in6 sa6; 1738 uint32_t flag, i, l; 1739 size_t sz; 1740 struct in_addr a4; 1741 1742 sz = bufsize; 1743 1744 /* 1745 * Some shorthands for printing values: 1746 * legacy assumes all values are equal, so keep the first one. 1747 */ 1748 if (vmask == IPFW_VTYPE_LEGACY) { 1749 if (print_ip != 0) { 1750 flag = htonl(v->tag); 1751 inet_ntop(AF_INET, &flag, buf, sz); 1752 } else 1753 snprintf(buf, sz, "%u", v->tag); 1754 return; 1755 } 1756 1757 for (i = 1; i < (1 << 31); i *= 2) { 1758 if ((flag = (vmask & i)) == 0) 1759 continue; 1760 l = 0; 1761 1762 switch (flag) { 1763 case IPFW_VTYPE_TAG: 1764 l = snprintf(buf, sz, "%u,", v->tag); 1765 break; 1766 case IPFW_VTYPE_PIPE: 1767 l = snprintf(buf, sz, "%u,", v->pipe); 1768 break; 1769 case IPFW_VTYPE_DIVERT: 1770 l = snprintf(buf, sz, "%d,", v->divert); 1771 break; 1772 case IPFW_VTYPE_SKIPTO: 1773 l = snprintf(buf, sz, "%d,", v->skipto); 1774 break; 1775 case IPFW_VTYPE_NETGRAPH: 1776 l = snprintf(buf, sz, "%u,", v->netgraph); 1777 break; 1778 case IPFW_VTYPE_FIB: 1779 l = snprintf(buf, sz, "%u,", v->fib); 1780 break; 1781 case IPFW_VTYPE_NAT: 1782 l = snprintf(buf, sz, "%u,", v->nat); 1783 break; 1784 case IPFW_VTYPE_LIMIT: 1785 l = snprintf(buf, sz, "%u,", v->limit); 1786 break; 1787 case IPFW_VTYPE_NH4: 1788 a4.s_addr = htonl(v->nh4); 1789 inet_ntop(AF_INET, &a4, abuf, sizeof(abuf)); 1790 l = snprintf(buf, sz, "%s,", abuf); 1791 break; 1792 case IPFW_VTYPE_DSCP: 1793 l = snprintf(buf, sz, "%d,", v->dscp); 1794 break; 1795 case IPFW_VTYPE_NH6: 1796 sa6.sin6_family = AF_INET6; 1797 sa6.sin6_len = sizeof(sa6); 1798 sa6.sin6_addr = v->nh6; 1799 sa6.sin6_port = 0; 1800 sa6.sin6_scope_id = v->zoneid; 1801 if (getnameinfo((const struct sockaddr *)&sa6, 1802 sa6.sin6_len, abuf, sizeof(abuf), NULL, 0, 1803 NI_NUMERICHOST) == 0) 1804 l = snprintf(buf, sz, "%s,", abuf); 1805 break; 1806 } 1807 1808 buf += l; 1809 sz -= l; 1810 } 1811 1812 if (sz != bufsize) 1813 *(buf - 1) = '\0'; 1814 } 1815 1816 static void 1817 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent) 1818 { 1819 char *comma, tbuf[128], pval[128]; 1820 void *paddr; 1821 struct tflow_entry *tfe; 1822 1823 table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask, 1824 co.do_value_as_ip); 1825 1826 switch (i->type) { 1827 case IPFW_TABLE_ADDR: 1828 /* IPv4 or IPv6 prefixes */ 1829 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf)); 1830 printf("%s/%u %s\n", tbuf, tent->masklen, pval); 1831 break; 1832 case IPFW_TABLE_INTERFACE: 1833 /* Interface names */ 1834 printf("%s %s\n", tent->k.iface, pval); 1835 break; 1836 case IPFW_TABLE_NUMBER: 1837 /* numbers */ 1838 printf("%u %s\n", tent->k.key, pval); 1839 break; 1840 case IPFW_TABLE_FLOW: 1841 /* flows */ 1842 tfe = &tent->k.flow; 1843 comma = ""; 1844 1845 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) { 1846 if (tfe->af == AF_INET) 1847 paddr = &tfe->a.a4.sip; 1848 else 1849 paddr = &tfe->a.a6.sip6; 1850 1851 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1852 printf("%s%s", comma, tbuf); 1853 comma = ","; 1854 } 1855 1856 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) { 1857 printf("%s%d", comma, tfe->proto); 1858 comma = ","; 1859 } 1860 1861 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1862 printf("%s%d", comma, ntohs(tfe->sport)); 1863 comma = ","; 1864 } 1865 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) { 1866 if (tfe->af == AF_INET) 1867 paddr = &tfe->a.a4.dip; 1868 else 1869 paddr = &tfe->a.a6.dip6; 1870 1871 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1872 printf("%s%s", comma, tbuf); 1873 comma = ","; 1874 } 1875 1876 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1877 printf("%s%d", comma, ntohs(tfe->dport)); 1878 comma = ","; 1879 } 1880 1881 printf(" %s\n", pval); 1882 } 1883 } 1884 1885 static int 1886 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh) 1887 { 1888 ipfw_obj_lheader req, *olh; 1889 size_t sz; 1890 1891 memset(&req, 0, sizeof(req)); 1892 sz = sizeof(req); 1893 1894 if (do_get3(opcode, &req.opheader, &sz) != 0) 1895 if (errno != ENOMEM) 1896 return (errno); 1897 1898 sz = req.size; 1899 if ((olh = calloc(1, sz)) == NULL) 1900 return (ENOMEM); 1901 1902 olh->size = sz; 1903 if (do_get3(opcode, &olh->opheader, &sz) != 0) { 1904 free(olh); 1905 return (errno); 1906 } 1907 1908 *polh = olh; 1909 return (0); 1910 } 1911 1912 static int 1913 table_do_get_algolist(ipfw_obj_lheader **polh) 1914 { 1915 1916 return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh)); 1917 } 1918 1919 static int 1920 table_do_get_vlist(ipfw_obj_lheader **polh) 1921 { 1922 1923 return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh)); 1924 } 1925 1926 void 1927 ipfw_list_ta(int ac, char *av[]) 1928 { 1929 ipfw_obj_lheader *olh; 1930 ipfw_ta_info *info; 1931 int error, i; 1932 const char *atype; 1933 1934 error = table_do_get_algolist(&olh); 1935 if (error != 0) 1936 err(EX_OSERR, "Unable to request algorithm list"); 1937 1938 info = (ipfw_ta_info *)(olh + 1); 1939 for (i = 0; i < olh->count; i++) { 1940 if ((atype = match_value(tabletypes, info->type)) == NULL) 1941 atype = "unknown"; 1942 printf("--- %s ---\n", info->algoname); 1943 printf(" type: %s\n refcount: %u\n", atype, info->refcnt); 1944 1945 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize); 1946 } 1947 1948 free(olh); 1949 } 1950 1951 1952 /* Copy of current kernel table_value structure */ 1953 struct _table_value { 1954 uint32_t tag; /* O_TAG/O_TAGGED */ 1955 uint32_t pipe; /* O_PIPE/O_QUEUE */ 1956 uint16_t divert; /* O_DIVERT/O_TEE */ 1957 uint16_t skipto; /* skipto, CALLRET */ 1958 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ 1959 uint32_t fib; /* O_SETFIB */ 1960 uint32_t nat; /* O_NAT */ 1961 uint32_t nh4; 1962 uint8_t dscp; 1963 uint8_t spare0; 1964 uint16_t spare1; 1965 /* -- 32 bytes -- */ 1966 struct in6_addr nh6; 1967 uint32_t limit; /* O_LIMIT */ 1968 uint32_t zoneid; 1969 uint64_t refcnt; /* Number of references */ 1970 }; 1971 1972 int 1973 compare_values(const void *_a, const void *_b) 1974 { 1975 struct _table_value *a, *b; 1976 1977 a = (struct _table_value *)_a; 1978 b = (struct _table_value *)_b; 1979 1980 if (a->spare1 < b->spare1) 1981 return (-1); 1982 else if (a->spare1 > b->spare1) 1983 return (1); 1984 1985 return (0); 1986 } 1987 1988 void 1989 ipfw_list_values(int ac, char *av[]) 1990 { 1991 ipfw_obj_lheader *olh; 1992 struct _table_value *v; 1993 int error, i; 1994 uint32_t vmask; 1995 char buf[128]; 1996 1997 error = table_do_get_vlist(&olh); 1998 if (error != 0) 1999 err(EX_OSERR, "Unable to request value list"); 2000 2001 vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */ 2002 2003 table_print_valheader(buf, sizeof(buf), vmask); 2004 printf("HEADER: %s\n", buf); 2005 v = (struct _table_value *)(olh + 1); 2006 qsort(v, olh->count, olh->objsize, compare_values); 2007 for (i = 0; i < olh->count; i++) { 2008 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v, 2009 vmask, 0); 2010 printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf); 2011 v = (struct _table_value *)((caddr_t)v + olh->objsize); 2012 } 2013 2014 free(olh); 2015 } 2016 2017 int 2018 table_check_name(const char *tablename) 2019 { 2020 2021 if (ipfw_check_object_name(tablename) != 0) 2022 return (EINVAL); 2023 /* Restrict some 'special' names */ 2024 if (strcmp(tablename, "all") == 0) 2025 return (EINVAL); 2026 return (0); 2027 } 2028 2029