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 arg = is_all ? (void*)1 : (void*)0; 286 if (is_all == 0) { 287 ipfw_xtable_info i; 288 if ((error = table_get_info(&oh, &i)) != 0) 289 err(EX_OSERR, "failed to request table info"); 290 table_show_one(&i, arg); 291 } else { 292 error = tables_foreach(table_show_one, arg, 1); 293 if (error != 0) 294 err(EX_OSERR, "failed to request tables list"); 295 } 296 break; 297 case TOK_LOOKUP: 298 ac--; av++; 299 table_lookup(&oh, ac, av); 300 break; 301 } 302 } 303 304 void 305 table_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set, 306 uint16_t uidx) 307 { 308 309 ntlv->head.type = IPFW_TLV_TBL_NAME; 310 ntlv->head.length = sizeof(ipfw_obj_ntlv); 311 ntlv->idx = uidx; 312 ntlv->set = set; 313 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 314 } 315 316 static void 317 table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i) 318 { 319 320 oh->idx = 1; 321 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 322 } 323 324 static struct _s_x tablenewcmds[] = { 325 { "type", TOK_TYPE }, 326 { "valtype", TOK_VALTYPE }, 327 { "algo", TOK_ALGO }, 328 { "limit", TOK_LIMIT }, 329 { "locked", TOK_LOCK }, 330 { NULL, 0 } 331 }; 332 333 static struct _s_x flowtypecmds[] = { 334 { "src-ip", IPFW_TFFLAG_SRCIP }, 335 { "proto", IPFW_TFFLAG_PROTO }, 336 { "src-port", IPFW_TFFLAG_SRCPORT }, 337 { "dst-ip", IPFW_TFFLAG_DSTIP }, 338 { "dst-port", IPFW_TFFLAG_DSTPORT }, 339 { NULL, 0 } 340 }; 341 342 int 343 table_parse_type(uint8_t ttype, char *p, uint8_t *tflags) 344 { 345 uint32_t fset, fclear; 346 char *e; 347 348 /* Parse type options */ 349 switch(ttype) { 350 case IPFW_TABLE_FLOW: 351 fset = fclear = 0; 352 if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0) 353 errx(EX_USAGE, 354 "unable to parse flow option %s", e); 355 *tflags = fset; 356 break; 357 default: 358 return (EX_USAGE); 359 } 360 361 return (0); 362 } 363 364 void 365 table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags) 366 { 367 const char *tname; 368 int l; 369 370 if ((tname = match_value(tabletypes, type)) == NULL) 371 tname = "unknown"; 372 373 l = snprintf(tbuf, size, "%s", tname); 374 tbuf += l; 375 size -= l; 376 377 switch(type) { 378 case IPFW_TABLE_FLOW: 379 if (tflags != 0) { 380 *tbuf++ = ':'; 381 l--; 382 print_flags_buffer(tbuf, size, flowtypecmds, tflags); 383 } 384 break; 385 } 386 } 387 388 /* 389 * Creates new table 390 * 391 * ipfw table NAME create [ type { addr | iface | number | flow } ] 392 * [ algo algoname ] 393 */ 394 static void 395 table_create(ipfw_obj_header *oh, int ac, char *av[]) 396 { 397 ipfw_xtable_info xi; 398 int error, tcmd, val; 399 uint32_t fset, fclear; 400 char *e, *p; 401 char tbuf[128]; 402 403 memset(&xi, 0, sizeof(xi)); 404 405 while (ac > 0) { 406 tcmd = get_token(tablenewcmds, *av, "option"); 407 ac--; av++; 408 409 switch (tcmd) { 410 case TOK_LIMIT: 411 NEED1("limit value required"); 412 xi.limit = strtol(*av, NULL, 10); 413 ac--; av++; 414 break; 415 case TOK_TYPE: 416 NEED1("table type required"); 417 /* Type may have suboptions after ':' */ 418 if ((p = strchr(*av, ':')) != NULL) 419 *p++ = '\0'; 420 val = match_token(tabletypes, *av); 421 if (val == -1) { 422 concat_tokens(tbuf, sizeof(tbuf), tabletypes, 423 ", "); 424 errx(EX_USAGE, 425 "Unknown tabletype: %s. Supported: %s", 426 *av, tbuf); 427 } 428 xi.type = val; 429 if (p != NULL) { 430 error = table_parse_type(val, p, &xi.tflags); 431 if (error != 0) 432 errx(EX_USAGE, 433 "Unsupported suboptions: %s", p); 434 } 435 ac--; av++; 436 break; 437 case TOK_VALTYPE: 438 NEED1("table value type required"); 439 fset = fclear = 0; 440 val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear); 441 if (val != -1) { 442 xi.vmask = fset; 443 ac--; av++; 444 break; 445 } 446 concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", "); 447 errx(EX_USAGE, "Unknown value type: %s. Supported: %s", 448 e, tbuf); 449 break; 450 case TOK_ALGO: 451 NEED1("table algorithm name required"); 452 if (strlen(*av) > sizeof(xi.algoname)) 453 errx(EX_USAGE, "algorithm name too long"); 454 strlcpy(xi.algoname, *av, sizeof(xi.algoname)); 455 ac--; av++; 456 break; 457 case TOK_LOCK: 458 xi.flags |= IPFW_TGFLAGS_LOCKED; 459 break; 460 } 461 } 462 463 /* Set some defaults to preserve compatibility. */ 464 if (xi.algoname[0] == '\0' && xi.type == 0) 465 xi.type = IPFW_TABLE_ADDR; 466 if (xi.vmask == 0) 467 xi.vmask = IPFW_VTYPE_LEGACY; 468 469 if ((error = table_do_create(oh, &xi)) != 0) 470 err(EX_OSERR, "Table creation failed"); 471 } 472 473 /* 474 * Creates new table 475 * 476 * Request: [ ipfw_obj_header ipfw_xtable_info ] 477 * 478 * Returns 0 on success. 479 */ 480 static int 481 table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i) 482 { 483 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 484 int error; 485 486 memcpy(tbuf, oh, sizeof(*oh)); 487 memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); 488 oh = (ipfw_obj_header *)tbuf; 489 490 error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf)); 491 492 return (error); 493 } 494 495 /* 496 * Modifies existing table 497 * 498 * ipfw table NAME modify [ limit number ] 499 */ 500 static void 501 table_modify(ipfw_obj_header *oh, int ac, char *av[]) 502 { 503 ipfw_xtable_info xi; 504 int tcmd; 505 506 memset(&xi, 0, sizeof(xi)); 507 508 while (ac > 0) { 509 tcmd = get_token(tablenewcmds, *av, "option"); 510 ac--; av++; 511 512 switch (tcmd) { 513 case TOK_LIMIT: 514 NEED1("limit value required"); 515 xi.limit = strtol(*av, NULL, 10); 516 xi.mflags |= IPFW_TMFLAGS_LIMIT; 517 ac--; av++; 518 break; 519 default: 520 errx(EX_USAGE, "cmd is not supported for modification"); 521 } 522 } 523 524 if (table_do_modify(oh, &xi) != 0) 525 err(EX_OSERR, "Table modification failed"); 526 } 527 528 /* 529 * Modifies existing table. 530 * 531 * Request: [ ipfw_obj_header ipfw_xtable_info ] 532 * 533 * Returns 0 on success. 534 */ 535 static int 536 table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i) 537 { 538 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 539 int error; 540 541 memcpy(tbuf, oh, sizeof(*oh)); 542 memcpy(tbuf + sizeof(*oh), i, sizeof(*i)); 543 oh = (ipfw_obj_header *)tbuf; 544 545 error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf)); 546 547 return (error); 548 } 549 550 /* 551 * Locks or unlocks given table 552 */ 553 static void 554 table_lock(ipfw_obj_header *oh, int lock) 555 { 556 ipfw_xtable_info xi; 557 558 memset(&xi, 0, sizeof(xi)); 559 560 xi.mflags |= IPFW_TMFLAGS_LOCK; 561 xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0; 562 563 if (table_do_modify(oh, &xi) != 0) 564 err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock"); 565 } 566 567 /* 568 * Destroys given table specified by @oh->ntlv. 569 * Returns 0 on success. 570 */ 571 static int 572 table_destroy(ipfw_obj_header *oh) 573 { 574 575 if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0) 576 return (-1); 577 578 return (0); 579 } 580 581 static int 582 table_destroy_one(ipfw_xtable_info *i, void *arg) 583 { 584 ipfw_obj_header *oh; 585 586 oh = (ipfw_obj_header *)arg; 587 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 588 if (table_destroy(oh) != 0) { 589 if (co.do_quiet == 0) 590 warn("failed to destroy table(%s) in set %u", 591 i->tablename, i->set); 592 return (-1); 593 } 594 return (0); 595 } 596 597 /* 598 * Flushes given table specified by @oh->ntlv. 599 * Returns 0 on success. 600 */ 601 static int 602 table_flush(ipfw_obj_header *oh) 603 { 604 605 if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0) 606 return (-1); 607 608 return (0); 609 } 610 611 static int 612 table_do_swap(ipfw_obj_header *oh, char *second) 613 { 614 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)]; 615 int error; 616 617 memset(tbuf, 0, sizeof(tbuf)); 618 memcpy(tbuf, oh, sizeof(*oh)); 619 oh = (ipfw_obj_header *)tbuf; 620 table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1); 621 622 error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf)); 623 624 return (error); 625 } 626 627 /* 628 * Swaps given table with @second one. 629 */ 630 static int 631 table_swap(ipfw_obj_header *oh, char *second) 632 { 633 634 if (table_check_name(second) != 0) 635 errx(EX_USAGE, "table name %s is invalid", second); 636 637 if (table_do_swap(oh, second) == 0) 638 return (0); 639 640 switch (errno) { 641 case EINVAL: 642 errx(EX_USAGE, "Unable to swap table: check types"); 643 case EFBIG: 644 errx(EX_USAGE, "Unable to swap table: check limits"); 645 } 646 647 return (0); 648 } 649 650 651 /* 652 * Retrieves table in given table specified by @oh->ntlv. 653 * it inside @i. 654 * Returns 0 on success. 655 */ 656 static int 657 table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i) 658 { 659 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)]; 660 size_t sz; 661 662 sz = sizeof(tbuf); 663 memset(tbuf, 0, sizeof(tbuf)); 664 memcpy(tbuf, oh, sizeof(*oh)); 665 oh = (ipfw_obj_header *)tbuf; 666 667 if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0) 668 return (errno); 669 670 if (sz < sizeof(tbuf)) 671 return (EINVAL); 672 673 *i = *(ipfw_xtable_info *)(oh + 1); 674 675 return (0); 676 } 677 678 static struct _s_x tablealgoclass[] = { 679 { "hash", IPFW_TACLASS_HASH }, 680 { "array", IPFW_TACLASS_ARRAY }, 681 { "radix", IPFW_TACLASS_RADIX }, 682 { NULL, 0 } 683 }; 684 685 struct ta_cldata { 686 uint8_t taclass; 687 uint8_t spare4; 688 uint16_t itemsize; 689 uint16_t itemsize6; 690 uint32_t size; 691 uint32_t count; 692 }; 693 694 /* 695 * Print global/per-AF table @i algorithm info. 696 */ 697 static void 698 table_show_tainfo(ipfw_xtable_info *i, struct ta_cldata *d, 699 const char *af, const char *taclass) 700 { 701 702 switch (d->taclass) { 703 case IPFW_TACLASS_HASH: 704 case IPFW_TACLASS_ARRAY: 705 printf(" %salgorithm %s info\n", af, taclass); 706 if (d->itemsize == d->itemsize6) 707 printf(" size: %u items: %u itemsize: %u\n", 708 d->size, d->count, d->itemsize); 709 else 710 printf(" size: %u items: %u " 711 "itemsize4: %u itemsize6: %u\n", 712 d->size, d->count, 713 d->itemsize, d->itemsize6); 714 break; 715 case IPFW_TACLASS_RADIX: 716 printf(" %salgorithm %s info\n", af, taclass); 717 if (d->itemsize == d->itemsize6) 718 printf(" items: %u itemsize: %u\n", 719 d->count, d->itemsize); 720 else 721 printf(" items: %u " 722 "itemsize4: %u itemsize6: %u\n", 723 d->count, d->itemsize, d->itemsize6); 724 break; 725 default: 726 printf(" algo class: %s\n", taclass); 727 } 728 } 729 730 static void 731 table_print_valheader(char *buf, size_t bufsize, uint32_t vmask) 732 { 733 734 if (vmask == IPFW_VTYPE_LEGACY) { 735 snprintf(buf, bufsize, "legacy"); 736 return; 737 } 738 739 memset(buf, 0, bufsize); 740 print_flags_buffer(buf, bufsize, tablevaltypes, vmask); 741 } 742 743 /* 744 * Prints table info struct @i in human-readable form. 745 */ 746 static int 747 table_show_info(ipfw_xtable_info *i, void *arg) 748 { 749 const char *vtype; 750 ipfw_ta_tinfo *tainfo; 751 int afdata, afitem; 752 struct ta_cldata d; 753 char ttype[64], tvtype[64]; 754 755 table_print_type(ttype, sizeof(ttype), i->type, i->tflags); 756 table_print_valheader(tvtype, sizeof(tvtype), i->vmask); 757 758 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 759 if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0) 760 printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype); 761 else 762 printf(" kindex: %d, type: %s\n", i->kidx, ttype); 763 printf(" references: %u, valtype: %s\n", i->refcnt, tvtype); 764 printf(" algorithm: %s\n", i->algoname); 765 printf(" items: %u, size: %u\n", i->count, i->size); 766 if (i->limit > 0) 767 printf(" limit: %u\n", i->limit); 768 769 /* Print algo-specific info if requested & set */ 770 if (arg == NULL) 771 return (0); 772 773 if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0) 774 return (0); 775 tainfo = &i->ta_info; 776 777 afdata = 0; 778 afitem = 0; 779 if (tainfo->flags & IPFW_TATFLAGS_AFDATA) 780 afdata = 1; 781 if (tainfo->flags & IPFW_TATFLAGS_AFITEM) 782 afitem = 1; 783 784 memset(&d, 0, sizeof(d)); 785 d.taclass = tainfo->taclass4; 786 d.size = tainfo->size4; 787 d.count = tainfo->count4; 788 d.itemsize = tainfo->itemsize4; 789 if (afdata == 0 && afitem != 0) 790 d.itemsize6 = tainfo->itemsize6; 791 else 792 d.itemsize6 = d.itemsize; 793 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 794 vtype = "unknown"; 795 796 if (afdata == 0) { 797 table_show_tainfo(i, &d, "", vtype); 798 } else { 799 table_show_tainfo(i, &d, "IPv4 ", vtype); 800 memset(&d, 0, sizeof(d)); 801 d.taclass = tainfo->taclass6; 802 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL) 803 vtype = "unknown"; 804 d.size = tainfo->size6; 805 d.count = tainfo->count6; 806 d.itemsize = tainfo->itemsize6; 807 d.itemsize6 = d.itemsize; 808 table_show_tainfo(i, &d, "IPv6 ", vtype); 809 } 810 811 return (0); 812 } 813 814 815 /* 816 * Function wrappers which can be used either 817 * as is or as foreach function parameter. 818 */ 819 820 static int 821 table_show_one(ipfw_xtable_info *i, void *arg) 822 { 823 ipfw_obj_header *oh; 824 int error; 825 int is_all = (int)arg; 826 827 if ((error = table_do_get_list(i, &oh)) != 0) { 828 err(EX_OSERR, "Error requesting table %s list", i->tablename); 829 return (error); 830 } 831 832 table_show_list(oh, is_all); 833 834 free(oh); 835 return (0); 836 } 837 838 static int 839 table_flush_one(ipfw_xtable_info *i, void *arg) 840 { 841 ipfw_obj_header *oh; 842 843 oh = (ipfw_obj_header *)arg; 844 845 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1); 846 847 return (table_flush(oh)); 848 } 849 850 static int 851 table_do_modify_record(int cmd, ipfw_obj_header *oh, 852 ipfw_obj_tentry *tent, int count, int atomic) 853 { 854 ipfw_obj_ctlv *ctlv; 855 ipfw_obj_tentry *tent_base; 856 caddr_t pbuf; 857 char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)]; 858 int error, i; 859 size_t sz; 860 861 sz = sizeof(*ctlv) + sizeof(*tent) * count; 862 if (count == 1) { 863 memset(xbuf, 0, sizeof(xbuf)); 864 pbuf = xbuf; 865 } else { 866 if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL) 867 return (ENOMEM); 868 } 869 870 memcpy(pbuf, oh, sizeof(*oh)); 871 oh = (ipfw_obj_header *)pbuf; 872 oh->opheader.version = 1; 873 874 ctlv = (ipfw_obj_ctlv *)(oh + 1); 875 ctlv->count = count; 876 ctlv->head.length = sz; 877 if (atomic != 0) 878 ctlv->flags |= IPFW_CTF_ATOMIC; 879 880 tent_base = tent; 881 memcpy(ctlv + 1, tent, sizeof(*tent) * count); 882 tent = (ipfw_obj_tentry *)(ctlv + 1); 883 for (i = 0; i < count; i++, tent++) { 884 tent->head.length = sizeof(ipfw_obj_tentry); 885 tent->idx = oh->idx; 886 } 887 888 sz += sizeof(*oh); 889 error = do_get3(cmd, &oh->opheader, &sz); 890 if (error != 0) 891 error = errno; 892 tent = (ipfw_obj_tentry *)(ctlv + 1); 893 /* Copy result back to provided buffer */ 894 memcpy(tent_base, ctlv + 1, sizeof(*tent) * count); 895 896 if (pbuf != xbuf) 897 free(pbuf); 898 899 return (error); 900 } 901 902 static void 903 table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, 904 int quiet, int update, int atomic) 905 { 906 ipfw_obj_tentry *ptent, tent, *tent_buf; 907 ipfw_xtable_info xi; 908 uint8_t type; 909 uint32_t vmask; 910 int cmd, count, error, i, ignored; 911 char *texterr, *etxt, *px; 912 913 if (ac == 0) 914 errx(EX_USAGE, "address required"); 915 916 if (add != 0) { 917 cmd = IP_FW_TABLE_XADD; 918 texterr = "Adding record failed"; 919 } else { 920 cmd = IP_FW_TABLE_XDEL; 921 texterr = "Deleting record failed"; 922 } 923 924 /* 925 * Calculate number of entries: 926 * Assume [key val] x N for add 927 * and 928 * key x N for delete 929 */ 930 count = (add != 0) ? ac / 2 + 1 : ac; 931 932 if (count <= 1) { 933 /* Adding single entry with/without value */ 934 memset(&tent, 0, sizeof(tent)); 935 tent_buf = &tent; 936 } else { 937 938 if ((tent_buf = calloc(count, sizeof(tent))) == NULL) 939 errx(EX_OSERR, 940 "Unable to allocate memory for all entries"); 941 } 942 ptent = tent_buf; 943 944 memset(&xi, 0, sizeof(xi)); 945 count = 0; 946 while (ac > 0) { 947 tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi); 948 949 /* 950 * Compatibility layer: auto-create table if not exists. 951 */ 952 if (xi.tablename[0] == '\0') { 953 xi.type = type; 954 xi.vmask = vmask; 955 strlcpy(xi.tablename, oh->ntlv.name, 956 sizeof(xi.tablename)); 957 if (quiet == 0) 958 warnx("DEPRECATED: inserting data into " 959 "non-existent table %s. (auto-created)", 960 xi.tablename); 961 table_do_create(oh, &xi); 962 } 963 964 oh->ntlv.type = type; 965 ac--; av++; 966 967 if (add != 0 && ac > 0) { 968 tentry_fill_value(oh, ptent, *av, type, vmask); 969 ac--; av++; 970 } 971 972 if (update != 0) 973 ptent->head.flags |= IPFW_TF_UPDATE; 974 975 count++; 976 ptent++; 977 } 978 979 error = table_do_modify_record(cmd, oh, tent_buf, count, atomic); 980 981 /* 982 * Compatibility stuff: do not yell on duplicate keys or 983 * failed deletions. 984 */ 985 if (error == 0 || (error == EEXIST && add != 0) || 986 (error == ENOENT && add == 0)) { 987 if (quiet != 0) { 988 if (tent_buf != &tent) 989 free(tent_buf); 990 return; 991 } 992 } 993 994 /* Report results back */ 995 ptent = tent_buf; 996 for (i = 0; i < count; ptent++, i++) { 997 ignored = 0; 998 switch (ptent->result) { 999 case IPFW_TR_ADDED: 1000 px = "added"; 1001 break; 1002 case IPFW_TR_DELETED: 1003 px = "deleted"; 1004 break; 1005 case IPFW_TR_UPDATED: 1006 px = "updated"; 1007 break; 1008 case IPFW_TR_LIMIT: 1009 px = "limit"; 1010 ignored = 1; 1011 break; 1012 case IPFW_TR_ERROR: 1013 px = "error"; 1014 ignored = 1; 1015 break; 1016 case IPFW_TR_NOTFOUND: 1017 px = "notfound"; 1018 ignored = 1; 1019 break; 1020 case IPFW_TR_EXISTS: 1021 px = "exists"; 1022 ignored = 1; 1023 break; 1024 case IPFW_TR_IGNORED: 1025 px = "ignored"; 1026 ignored = 1; 1027 break; 1028 default: 1029 px = "unknown"; 1030 ignored = 1; 1031 } 1032 1033 if (error != 0 && atomic != 0 && ignored == 0) 1034 printf("%s(reverted): ", px); 1035 else 1036 printf("%s: ", px); 1037 1038 table_show_entry(&xi, ptent); 1039 } 1040 1041 if (tent_buf != &tent) 1042 free(tent_buf); 1043 1044 if (error == 0) 1045 return; 1046 /* Get real OS error */ 1047 error = errno; 1048 1049 /* Try to provide more human-readable error */ 1050 switch (error) { 1051 case EEXIST: 1052 etxt = "record already exists"; 1053 break; 1054 case EFBIG: 1055 etxt = "limit hit"; 1056 break; 1057 case ESRCH: 1058 etxt = "table not found"; 1059 break; 1060 case ENOENT: 1061 etxt = "record not found"; 1062 break; 1063 case EACCES: 1064 etxt = "table is locked"; 1065 break; 1066 default: 1067 etxt = strerror(error); 1068 } 1069 1070 errx(EX_OSERR, "%s: %s", texterr, etxt); 1071 } 1072 1073 static int 1074 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi, 1075 ipfw_obj_tentry *xtent) 1076 { 1077 char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)]; 1078 ipfw_obj_tentry *tent; 1079 uint8_t type; 1080 uint32_t vmask; 1081 size_t sz; 1082 1083 memcpy(xbuf, oh, sizeof(*oh)); 1084 oh = (ipfw_obj_header *)xbuf; 1085 tent = (ipfw_obj_tentry *)(oh + 1); 1086 1087 memset(tent, 0, sizeof(*tent)); 1088 tent->head.length = sizeof(*tent); 1089 tent->idx = 1; 1090 1091 tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi); 1092 oh->ntlv.type = type; 1093 1094 sz = sizeof(xbuf); 1095 if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0) 1096 return (errno); 1097 1098 if (sz < sizeof(xbuf)) 1099 return (EINVAL); 1100 1101 *xtent = *tent; 1102 1103 return (0); 1104 } 1105 1106 static void 1107 table_lookup(ipfw_obj_header *oh, int ac, char *av[]) 1108 { 1109 ipfw_obj_tentry xtent; 1110 ipfw_xtable_info xi; 1111 char key[64]; 1112 int error; 1113 1114 if (ac == 0) 1115 errx(EX_USAGE, "address required"); 1116 1117 strlcpy(key, *av, sizeof(key)); 1118 1119 memset(&xi, 0, sizeof(xi)); 1120 error = table_do_lookup(oh, key, &xi, &xtent); 1121 1122 switch (error) { 1123 case 0: 1124 break; 1125 case ESRCH: 1126 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name); 1127 case ENOENT: 1128 errx(EX_UNAVAILABLE, "Entry %s not found", *av); 1129 case ENOTSUP: 1130 errx(EX_UNAVAILABLE, "Table %s algo does not support " 1131 "\"lookup\" method", oh->ntlv.name); 1132 default: 1133 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)"); 1134 } 1135 1136 table_show_entry(&xi, &xtent); 1137 } 1138 1139 static void 1140 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type, 1141 uint8_t tflags) 1142 { 1143 char *p, *pp; 1144 int mask, af; 1145 struct in6_addr *paddr, tmp; 1146 struct tflow_entry *tfe; 1147 uint32_t key, *pkey; 1148 uint16_t port; 1149 struct protoent *pent; 1150 struct servent *sent; 1151 int masklen; 1152 1153 masklen = 0; 1154 af = 0; 1155 paddr = (struct in6_addr *)&tentry->k; 1156 1157 switch (type) { 1158 case IPFW_TABLE_ADDR: 1159 /* Remove / if exists */ 1160 if ((p = strchr(arg, '/')) != NULL) { 1161 *p = '\0'; 1162 mask = atoi(p + 1); 1163 } 1164 1165 if (inet_pton(AF_INET, arg, paddr) == 1) { 1166 if (p != NULL && mask > 32) 1167 errx(EX_DATAERR, "bad IPv4 mask width: %s", 1168 p + 1); 1169 1170 masklen = p ? mask : 32; 1171 af = AF_INET; 1172 } else if (inet_pton(AF_INET6, arg, paddr) == 1) { 1173 if (IN6_IS_ADDR_V4COMPAT(paddr)) 1174 errx(EX_DATAERR, 1175 "Use IPv4 instead of v4-compatible"); 1176 if (p != NULL && mask > 128) 1177 errx(EX_DATAERR, "bad IPv6 mask width: %s", 1178 p + 1); 1179 1180 masklen = p ? mask : 128; 1181 af = AF_INET6; 1182 } else { 1183 /* Assume FQDN */ 1184 if (lookup_host(arg, (struct in_addr *)paddr) != 0) 1185 errx(EX_NOHOST, "hostname ``%s'' unknown", arg); 1186 1187 masklen = 32; 1188 type = IPFW_TABLE_ADDR; 1189 af = AF_INET; 1190 } 1191 break; 1192 case IPFW_TABLE_INTERFACE: 1193 /* Assume interface name. Copy significant data only */ 1194 mask = MIN(strlen(arg), IF_NAMESIZE - 1); 1195 memcpy(paddr, arg, mask); 1196 /* Set mask to exact match */ 1197 masklen = 8 * IF_NAMESIZE; 1198 break; 1199 case IPFW_TABLE_NUMBER: 1200 /* Port or any other key */ 1201 key = strtol(arg, &p, 10); 1202 if (*p != '\0') 1203 errx(EX_DATAERR, "Invalid number: %s", arg); 1204 1205 pkey = (uint32_t *)paddr; 1206 *pkey = key; 1207 masklen = 32; 1208 break; 1209 case IPFW_TABLE_FLOW: 1210 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */ 1211 tfe = &tentry->k.flow; 1212 af = 0; 1213 1214 /* Handle <ipv4|ipv6> */ 1215 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) { 1216 if ((p = strchr(arg, ',')) != NULL) 1217 *p++ = '\0'; 1218 /* Determine family using temporary storage */ 1219 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1220 if (af != 0 && af != AF_INET) 1221 errx(EX_DATAERR, 1222 "Inconsistent address family\n"); 1223 af = AF_INET; 1224 memcpy(&tfe->a.a4.sip, &tmp, 4); 1225 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1226 if (af != 0 && af != AF_INET6) 1227 errx(EX_DATAERR, 1228 "Inconsistent address family\n"); 1229 af = AF_INET6; 1230 memcpy(&tfe->a.a6.sip6, &tmp, 16); 1231 } 1232 1233 arg = p; 1234 } 1235 1236 /* Handle <proto-num|proto-name> */ 1237 if ((tflags & IPFW_TFFLAG_PROTO) != 0) { 1238 if (arg == NULL) 1239 errx(EX_DATAERR, "invalid key: proto missing"); 1240 if ((p = strchr(arg, ',')) != NULL) 1241 *p++ = '\0'; 1242 1243 key = strtol(arg, &pp, 10); 1244 if (*pp != '\0') { 1245 if ((pent = getprotobyname(arg)) == NULL) 1246 errx(EX_DATAERR, "Unknown proto: %s", 1247 arg); 1248 else 1249 key = pent->p_proto; 1250 } 1251 1252 if (key > 255) 1253 errx(EX_DATAERR, "Bad protocol number: %u",key); 1254 1255 tfe->proto = key; 1256 1257 arg = p; 1258 } 1259 1260 /* Handle <port-num|service-name> */ 1261 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1262 if (arg == NULL) 1263 errx(EX_DATAERR, "invalid key: src port missing"); 1264 if ((p = strchr(arg, ',')) != NULL) 1265 *p++ = '\0'; 1266 1267 port = htons(strtol(arg, &pp, 10)); 1268 if (*pp != '\0') { 1269 if ((sent = getservbyname(arg, NULL)) == NULL) 1270 errx(EX_DATAERR, "Unknown service: %s", 1271 arg); 1272 port = sent->s_port; 1273 } 1274 tfe->sport = port; 1275 arg = p; 1276 } 1277 1278 /* Handle <ipv4|ipv6>*/ 1279 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) { 1280 if (arg == NULL) 1281 errx(EX_DATAERR, "invalid key: dst ip missing"); 1282 if ((p = strchr(arg, ',')) != NULL) 1283 *p++ = '\0'; 1284 /* Determine family using temporary storage */ 1285 if (inet_pton(AF_INET, arg, &tmp) == 1) { 1286 if (af != 0 && af != AF_INET) 1287 errx(EX_DATAERR, 1288 "Inconsistent address family"); 1289 af = AF_INET; 1290 memcpy(&tfe->a.a4.dip, &tmp, 4); 1291 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) { 1292 if (af != 0 && af != AF_INET6) 1293 errx(EX_DATAERR, 1294 "Inconsistent address family"); 1295 af = AF_INET6; 1296 memcpy(&tfe->a.a6.dip6, &tmp, 16); 1297 } 1298 1299 arg = p; 1300 } 1301 1302 /* Handle <port-num|service-name> */ 1303 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1304 if (arg == NULL) 1305 errx(EX_DATAERR, "invalid key: dst port missing"); 1306 if ((p = strchr(arg, ',')) != NULL) 1307 *p++ = '\0'; 1308 1309 port = htons(strtol(arg, &pp, 10)); 1310 if (*pp != '\0') { 1311 if ((sent = getservbyname(arg, NULL)) == NULL) 1312 errx(EX_DATAERR, "Unknown service: %s", 1313 arg); 1314 port = sent->s_port; 1315 } 1316 tfe->dport = port; 1317 arg = p; 1318 } 1319 1320 tfe->af = af; 1321 1322 break; 1323 1324 default: 1325 errx(EX_DATAERR, "Unsupported table type: %d", type); 1326 } 1327 1328 tentry->subtype = af; 1329 tentry->masklen = masklen; 1330 } 1331 1332 /* 1333 * Tries to guess table key type. 1334 * This procedure is used in legacy table auto-create 1335 * code AND in `ipfw -n` ruleset checking. 1336 * 1337 * Imported from old table_fill_xentry() parse code. 1338 */ 1339 static int 1340 guess_key_type(char *key, uint8_t *ptype) 1341 { 1342 char *p; 1343 struct in6_addr addr; 1344 uint32_t kv; 1345 1346 if (ishexnumber(*key) != 0 || *key == ':') { 1347 /* Remove / if exists */ 1348 if ((p = strchr(key, '/')) != NULL) 1349 *p = '\0'; 1350 1351 if ((inet_pton(AF_INET, key, &addr) == 1) || 1352 (inet_pton(AF_INET6, key, &addr) == 1)) { 1353 *ptype = IPFW_TABLE_CIDR; 1354 if (p != NULL) 1355 *p = '/'; 1356 return (0); 1357 } else { 1358 /* Port or any other key */ 1359 /* Skip non-base 10 entries like 'fa1' */ 1360 kv = strtol(key, &p, 10); 1361 if (*p == '\0') { 1362 *ptype = IPFW_TABLE_NUMBER; 1363 return (0); 1364 } else if ((p != key) && (*p == '.')) { 1365 /* 1366 * Warn on IPv4 address strings 1367 * which are "valid" for inet_aton() but not 1368 * in inet_pton(). 1369 * 1370 * Typical examples: '10.5' or '10.0.0.05' 1371 */ 1372 return (1); 1373 } 1374 } 1375 } 1376 1377 if (strchr(key, '.') == NULL) { 1378 *ptype = IPFW_TABLE_INTERFACE; 1379 return (0); 1380 } 1381 1382 if (lookup_host(key, (struct in_addr *)&addr) != 0) 1383 return (1); 1384 1385 *ptype = IPFW_TABLE_CIDR; 1386 return (0); 1387 } 1388 1389 static void 1390 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key, 1391 int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi) 1392 { 1393 uint8_t type, tflags; 1394 uint32_t vmask; 1395 int error; 1396 1397 type = 0; 1398 tflags = 0; 1399 vmask = 0; 1400 1401 if (xi->tablename[0] == '\0') 1402 error = table_get_info(oh, xi); 1403 else 1404 error = 0; 1405 1406 if (error == 0) { 1407 if (co.test_only == 0) { 1408 /* Table found */ 1409 type = xi->type; 1410 tflags = xi->tflags; 1411 vmask = xi->vmask; 1412 } else { 1413 /* 1414 * We're running `ipfw -n` 1415 * Compatibility layer: try to guess key type 1416 * before failing. 1417 */ 1418 if (guess_key_type(key, &type) != 0) { 1419 /* Inknown key */ 1420 errx(EX_USAGE, "Cannot guess " 1421 "key '%s' type", key); 1422 } 1423 vmask = IPFW_VTYPE_LEGACY; 1424 } 1425 } else { 1426 if (error != ESRCH) 1427 errx(EX_OSERR, "Error requesting table %s info", 1428 oh->ntlv.name); 1429 if (add == 0) 1430 errx(EX_DATAERR, "Table %s does not exist", 1431 oh->ntlv.name); 1432 /* 1433 * Table does not exist 1434 * Compatibility layer: try to guess key type before failing. 1435 */ 1436 if (guess_key_type(key, &type) != 0) { 1437 /* Inknown key */ 1438 errx(EX_USAGE, "Table %s does not exist, cannot guess " 1439 "key '%s' type", oh->ntlv.name, key); 1440 } 1441 1442 vmask = IPFW_VTYPE_LEGACY; 1443 } 1444 1445 tentry_fill_key_type(key, tent, type, tflags); 1446 1447 *ptype = type; 1448 *pvmask = vmask; 1449 } 1450 1451 static void 1452 set_legacy_value(uint32_t val, ipfw_table_value *v) 1453 { 1454 v->tag = val; 1455 v->pipe = val; 1456 v->divert = val; 1457 v->skipto = val; 1458 v->netgraph = val; 1459 v->fib = val; 1460 v->nat = val; 1461 v->nh4 = val; 1462 v->dscp = (uint8_t)val; 1463 v->limit = val; 1464 } 1465 1466 static void 1467 tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg, 1468 uint8_t type, uint32_t vmask) 1469 { 1470 struct addrinfo hints, *res; 1471 uint32_t a4, flag, val; 1472 ipfw_table_value *v; 1473 uint32_t i; 1474 int dval; 1475 char *comma, *e, *etype, *n, *p; 1476 struct in_addr ipaddr; 1477 1478 v = &tent->v.value; 1479 1480 /* Compat layer: keep old behavior for legacy value types */ 1481 if (vmask == IPFW_VTYPE_LEGACY) { 1482 /* Try to interpret as number first */ 1483 val = strtoul(arg, &p, 0); 1484 if (*p == '\0') { 1485 set_legacy_value(val, v); 1486 return; 1487 } 1488 if (inet_pton(AF_INET, arg, &val) == 1) { 1489 set_legacy_value(ntohl(val), v); 1490 return; 1491 } 1492 /* Try hostname */ 1493 if (lookup_host(arg, &ipaddr) == 0) { 1494 set_legacy_value(ntohl(ipaddr.s_addr), v); 1495 return; 1496 } 1497 errx(EX_OSERR, "Unable to parse value %s", arg); 1498 } 1499 1500 /* 1501 * Shorthands: handle single value if vmask consists 1502 * of numbers only. e.g.: 1503 * vmask = "fib,skipto" -> treat input "1" as "1,1" 1504 */ 1505 1506 n = arg; 1507 etype = NULL; 1508 for (i = 1; i < (1 << 31); i *= 2) { 1509 if ((flag = (vmask & i)) == 0) 1510 continue; 1511 vmask &= ~flag; 1512 1513 if ((comma = strchr(n, ',')) != NULL) 1514 *comma = '\0'; 1515 1516 switch (flag) { 1517 case IPFW_VTYPE_TAG: 1518 v->tag = strtol(n, &e, 10); 1519 if (*e != '\0') 1520 etype = "tag"; 1521 break; 1522 case IPFW_VTYPE_PIPE: 1523 v->pipe = strtol(n, &e, 10); 1524 if (*e != '\0') 1525 etype = "pipe"; 1526 break; 1527 case IPFW_VTYPE_DIVERT: 1528 v->divert = strtol(n, &e, 10); 1529 if (*e != '\0') 1530 etype = "divert"; 1531 break; 1532 case IPFW_VTYPE_SKIPTO: 1533 v->skipto = strtol(n, &e, 10); 1534 if (*e != '\0') 1535 etype = "skipto"; 1536 break; 1537 case IPFW_VTYPE_NETGRAPH: 1538 v->netgraph = strtol(n, &e, 10); 1539 if (*e != '\0') 1540 etype = "netgraph"; 1541 break; 1542 case IPFW_VTYPE_FIB: 1543 v->fib = strtol(n, &e, 10); 1544 if (*e != '\0') 1545 etype = "fib"; 1546 break; 1547 case IPFW_VTYPE_NAT: 1548 v->nat = strtol(n, &e, 10); 1549 if (*e != '\0') 1550 etype = "nat"; 1551 break; 1552 case IPFW_VTYPE_LIMIT: 1553 v->limit = strtol(n, &e, 10); 1554 if (*e != '\0') 1555 etype = "limit"; 1556 break; 1557 case IPFW_VTYPE_NH4: 1558 if (strchr(n, '.') != NULL && 1559 inet_pton(AF_INET, n, &a4) == 1) { 1560 v->nh4 = ntohl(a4); 1561 break; 1562 } 1563 if (lookup_host(n, &ipaddr) == 0) { 1564 v->nh4 = ntohl(ipaddr.s_addr); 1565 break; 1566 } 1567 etype = "ipv4"; 1568 break; 1569 case IPFW_VTYPE_DSCP: 1570 if (isalpha(*n)) { 1571 if ((dval = match_token(f_ipdscp, n)) != -1) { 1572 v->dscp = dval; 1573 break; 1574 } else 1575 etype = "DSCP code"; 1576 } else { 1577 v->dscp = strtol(n, &e, 10); 1578 if (v->dscp > 63 || *e != '\0') 1579 etype = "DSCP value"; 1580 } 1581 break; 1582 case IPFW_VTYPE_NH6: 1583 if (strchr(n, ':') != NULL) { 1584 memset(&hints, 0, sizeof(hints)); 1585 hints.ai_family = AF_INET6; 1586 hints.ai_flags = AI_NUMERICHOST; 1587 if (getaddrinfo(n, NULL, &hints, &res) == 0) { 1588 v->nh6 = ((struct sockaddr_in6 *) 1589 res->ai_addr)->sin6_addr; 1590 v->zoneid = ((struct sockaddr_in6 *) 1591 res->ai_addr)->sin6_scope_id; 1592 freeaddrinfo(res); 1593 break; 1594 } 1595 } 1596 etype = "ipv6"; 1597 break; 1598 } 1599 1600 if (etype != NULL) 1601 errx(EX_USAGE, "Unable to parse %s as %s", n, etype); 1602 1603 if (comma != NULL) 1604 *comma++ = ','; 1605 1606 if ((n = comma) != NULL) 1607 continue; 1608 1609 /* End of input. */ 1610 if (vmask != 0) 1611 errx(EX_USAGE, "Not enough fields inside value"); 1612 } 1613 } 1614 1615 /* 1616 * Compare table names. 1617 * Honor number comparison. 1618 */ 1619 static int 1620 tablename_cmp(const void *a, const void *b) 1621 { 1622 ipfw_xtable_info *ia, *ib; 1623 1624 ia = (ipfw_xtable_info *)a; 1625 ib = (ipfw_xtable_info *)b; 1626 1627 return (stringnum_cmp(ia->tablename, ib->tablename)); 1628 } 1629 1630 /* 1631 * Retrieves table list from kernel, 1632 * optionally sorts it and calls requested function for each table. 1633 * Returns 0 on success. 1634 */ 1635 static int 1636 tables_foreach(table_cb_t *f, void *arg, int sort) 1637 { 1638 ipfw_obj_lheader *olh; 1639 ipfw_xtable_info *info; 1640 size_t sz; 1641 int i, error; 1642 1643 /* Start with reasonable default */ 1644 sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info); 1645 1646 for (;;) { 1647 if ((olh = calloc(1, sz)) == NULL) 1648 return (ENOMEM); 1649 1650 olh->size = sz; 1651 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) { 1652 sz = olh->size; 1653 free(olh); 1654 if (errno != ENOMEM) 1655 return (errno); 1656 continue; 1657 } 1658 1659 if (sort != 0) 1660 qsort(olh + 1, olh->count, olh->objsize, 1661 tablename_cmp); 1662 1663 info = (ipfw_xtable_info *)(olh + 1); 1664 for (i = 0; i < olh->count; i++) { 1665 if (co.use_set == 0 || info->set == co.use_set - 1) 1666 error = f(info, arg); 1667 info = (ipfw_xtable_info *)((caddr_t)info + 1668 olh->objsize); 1669 } 1670 free(olh); 1671 break; 1672 } 1673 return (0); 1674 } 1675 1676 1677 /* 1678 * Retrieves all entries for given table @i in 1679 * eXtended format. Allocate buffer large enough 1680 * to store result. Called needs to free it later. 1681 * 1682 * Returns 0 on success. 1683 */ 1684 static int 1685 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh) 1686 { 1687 ipfw_obj_header *oh; 1688 size_t sz; 1689 int c; 1690 1691 sz = 0; 1692 oh = NULL; 1693 for (c = 0; c < 8; c++) { 1694 if (sz < i->size) 1695 sz = i->size + 44; 1696 if (oh != NULL) 1697 free(oh); 1698 if ((oh = calloc(1, sz)) == NULL) 1699 continue; 1700 table_fill_objheader(oh, i); 1701 oh->opheader.version = 1; /* Current version */ 1702 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) { 1703 *poh = oh; 1704 return (0); 1705 } 1706 1707 if (errno != ENOMEM) 1708 break; 1709 } 1710 free(oh); 1711 1712 return (errno); 1713 } 1714 1715 /* 1716 * Shows all entries from @oh in human-readable format 1717 */ 1718 static void 1719 table_show_list(ipfw_obj_header *oh, int need_header) 1720 { 1721 ipfw_obj_tentry *tent; 1722 uint32_t count; 1723 ipfw_xtable_info *i; 1724 1725 i = (ipfw_xtable_info *)(oh + 1); 1726 tent = (ipfw_obj_tentry *)(i + 1); 1727 1728 if (need_header) 1729 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set); 1730 1731 count = i->count; 1732 while (count > 0) { 1733 table_show_entry(i, tent); 1734 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length); 1735 count--; 1736 } 1737 } 1738 1739 static void 1740 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v, 1741 uint32_t vmask, int print_ip) 1742 { 1743 char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1744 struct sockaddr_in6 sa6; 1745 uint32_t flag, i, l; 1746 size_t sz; 1747 struct in_addr a4; 1748 1749 sz = bufsize; 1750 1751 /* 1752 * Some shorthands for printing values: 1753 * legacy assumes all values are equal, so keep the first one. 1754 */ 1755 if (vmask == IPFW_VTYPE_LEGACY) { 1756 if (print_ip != 0) { 1757 flag = htonl(v->tag); 1758 inet_ntop(AF_INET, &flag, buf, sz); 1759 } else 1760 snprintf(buf, sz, "%u", v->tag); 1761 return; 1762 } 1763 1764 for (i = 1; i < (1 << 31); i *= 2) { 1765 if ((flag = (vmask & i)) == 0) 1766 continue; 1767 l = 0; 1768 1769 switch (flag) { 1770 case IPFW_VTYPE_TAG: 1771 l = snprintf(buf, sz, "%u,", v->tag); 1772 break; 1773 case IPFW_VTYPE_PIPE: 1774 l = snprintf(buf, sz, "%u,", v->pipe); 1775 break; 1776 case IPFW_VTYPE_DIVERT: 1777 l = snprintf(buf, sz, "%d,", v->divert); 1778 break; 1779 case IPFW_VTYPE_SKIPTO: 1780 l = snprintf(buf, sz, "%d,", v->skipto); 1781 break; 1782 case IPFW_VTYPE_NETGRAPH: 1783 l = snprintf(buf, sz, "%u,", v->netgraph); 1784 break; 1785 case IPFW_VTYPE_FIB: 1786 l = snprintf(buf, sz, "%u,", v->fib); 1787 break; 1788 case IPFW_VTYPE_NAT: 1789 l = snprintf(buf, sz, "%u,", v->nat); 1790 break; 1791 case IPFW_VTYPE_LIMIT: 1792 l = snprintf(buf, sz, "%u,", v->limit); 1793 break; 1794 case IPFW_VTYPE_NH4: 1795 a4.s_addr = htonl(v->nh4); 1796 inet_ntop(AF_INET, &a4, abuf, sizeof(abuf)); 1797 l = snprintf(buf, sz, "%s,", abuf); 1798 break; 1799 case IPFW_VTYPE_DSCP: 1800 l = snprintf(buf, sz, "%d,", v->dscp); 1801 break; 1802 case IPFW_VTYPE_NH6: 1803 sa6.sin6_family = AF_INET6; 1804 sa6.sin6_len = sizeof(sa6); 1805 sa6.sin6_addr = v->nh6; 1806 sa6.sin6_port = 0; 1807 sa6.sin6_scope_id = v->zoneid; 1808 if (getnameinfo((const struct sockaddr *)&sa6, 1809 sa6.sin6_len, abuf, sizeof(abuf), NULL, 0, 1810 NI_NUMERICHOST) == 0) 1811 l = snprintf(buf, sz, "%s,", abuf); 1812 break; 1813 } 1814 1815 buf += l; 1816 sz -= l; 1817 } 1818 1819 if (sz != bufsize) 1820 *(buf - 1) = '\0'; 1821 } 1822 1823 static void 1824 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent) 1825 { 1826 char *comma, tbuf[128], pval[128]; 1827 void *paddr; 1828 struct tflow_entry *tfe; 1829 1830 table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask, 1831 co.do_value_as_ip); 1832 1833 switch (i->type) { 1834 case IPFW_TABLE_ADDR: 1835 /* IPv4 or IPv6 prefixes */ 1836 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf)); 1837 printf("%s/%u %s\n", tbuf, tent->masklen, pval); 1838 break; 1839 case IPFW_TABLE_INTERFACE: 1840 /* Interface names */ 1841 printf("%s %s\n", tent->k.iface, pval); 1842 break; 1843 case IPFW_TABLE_NUMBER: 1844 /* numbers */ 1845 printf("%u %s\n", tent->k.key, pval); 1846 break; 1847 case IPFW_TABLE_FLOW: 1848 /* flows */ 1849 tfe = &tent->k.flow; 1850 comma = ""; 1851 1852 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) { 1853 if (tfe->af == AF_INET) 1854 paddr = &tfe->a.a4.sip; 1855 else 1856 paddr = &tfe->a.a6.sip6; 1857 1858 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1859 printf("%s%s", comma, tbuf); 1860 comma = ","; 1861 } 1862 1863 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) { 1864 printf("%s%d", comma, tfe->proto); 1865 comma = ","; 1866 } 1867 1868 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) { 1869 printf("%s%d", comma, ntohs(tfe->sport)); 1870 comma = ","; 1871 } 1872 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) { 1873 if (tfe->af == AF_INET) 1874 paddr = &tfe->a.a4.dip; 1875 else 1876 paddr = &tfe->a.a6.dip6; 1877 1878 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf)); 1879 printf("%s%s", comma, tbuf); 1880 comma = ","; 1881 } 1882 1883 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) { 1884 printf("%s%d", comma, ntohs(tfe->dport)); 1885 comma = ","; 1886 } 1887 1888 printf(" %s\n", pval); 1889 } 1890 } 1891 1892 static int 1893 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh) 1894 { 1895 ipfw_obj_lheader req, *olh; 1896 size_t sz; 1897 1898 memset(&req, 0, sizeof(req)); 1899 sz = sizeof(req); 1900 1901 if (do_get3(opcode, &req.opheader, &sz) != 0) 1902 if (errno != ENOMEM) 1903 return (errno); 1904 1905 sz = req.size; 1906 if ((olh = calloc(1, sz)) == NULL) 1907 return (ENOMEM); 1908 1909 olh->size = sz; 1910 if (do_get3(opcode, &olh->opheader, &sz) != 0) { 1911 free(olh); 1912 return (errno); 1913 } 1914 1915 *polh = olh; 1916 return (0); 1917 } 1918 1919 static int 1920 table_do_get_algolist(ipfw_obj_lheader **polh) 1921 { 1922 1923 return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh)); 1924 } 1925 1926 static int 1927 table_do_get_vlist(ipfw_obj_lheader **polh) 1928 { 1929 1930 return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh)); 1931 } 1932 1933 void 1934 ipfw_list_ta(int ac, char *av[]) 1935 { 1936 ipfw_obj_lheader *olh; 1937 ipfw_ta_info *info; 1938 int error, i; 1939 const char *atype; 1940 1941 error = table_do_get_algolist(&olh); 1942 if (error != 0) 1943 err(EX_OSERR, "Unable to request algorithm list"); 1944 1945 info = (ipfw_ta_info *)(olh + 1); 1946 for (i = 0; i < olh->count; i++) { 1947 if ((atype = match_value(tabletypes, info->type)) == NULL) 1948 atype = "unknown"; 1949 printf("--- %s ---\n", info->algoname); 1950 printf(" type: %s\n refcount: %u\n", atype, info->refcnt); 1951 1952 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize); 1953 } 1954 1955 free(olh); 1956 } 1957 1958 1959 /* Copy of current kernel table_value structure */ 1960 struct _table_value { 1961 uint32_t tag; /* O_TAG/O_TAGGED */ 1962 uint32_t pipe; /* O_PIPE/O_QUEUE */ 1963 uint16_t divert; /* O_DIVERT/O_TEE */ 1964 uint16_t skipto; /* skipto, CALLRET */ 1965 uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */ 1966 uint32_t fib; /* O_SETFIB */ 1967 uint32_t nat; /* O_NAT */ 1968 uint32_t nh4; 1969 uint8_t dscp; 1970 uint8_t spare0; 1971 uint16_t spare1; 1972 /* -- 32 bytes -- */ 1973 struct in6_addr nh6; 1974 uint32_t limit; /* O_LIMIT */ 1975 uint32_t zoneid; 1976 uint64_t refcnt; /* Number of references */ 1977 }; 1978 1979 int 1980 compare_values(const void *_a, const void *_b) 1981 { 1982 struct _table_value *a, *b; 1983 1984 a = (struct _table_value *)_a; 1985 b = (struct _table_value *)_b; 1986 1987 if (a->spare1 < b->spare1) 1988 return (-1); 1989 else if (a->spare1 > b->spare1) 1990 return (1); 1991 1992 return (0); 1993 } 1994 1995 void 1996 ipfw_list_values(int ac, char *av[]) 1997 { 1998 ipfw_obj_lheader *olh; 1999 struct _table_value *v; 2000 int error, i; 2001 uint32_t vmask; 2002 char buf[128]; 2003 2004 error = table_do_get_vlist(&olh); 2005 if (error != 0) 2006 err(EX_OSERR, "Unable to request value list"); 2007 2008 vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */ 2009 2010 table_print_valheader(buf, sizeof(buf), vmask); 2011 printf("HEADER: %s\n", buf); 2012 v = (struct _table_value *)(olh + 1); 2013 qsort(v, olh->count, olh->objsize, compare_values); 2014 for (i = 0; i < olh->count; i++) { 2015 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v, 2016 vmask, 0); 2017 printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf); 2018 v = (struct _table_value *)((caddr_t)v + olh->objsize); 2019 } 2020 2021 free(olh); 2022 } 2023 2024 int 2025 table_check_name(const char *tablename) 2026 { 2027 2028 if (ipfw_check_object_name(tablename) != 0) 2029 return (EINVAL); 2030 /* Restrict some 'special' names */ 2031 if (strcmp(tablename, "all") == 0) 2032 return (EINVAL); 2033 return (0); 2034 } 2035 2036