ipfw2.c revision 187767
1/* 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: head/sbin/ipfw/ipfw2.c 187767 2009-01-27 10:18:55Z luigi $ 21 */ 22 23#include <sys/types.h> 24#include <sys/socket.h> 25#include <sys/sockio.h> 26#include <sys/sysctl.h> 27 28#include "ipfw2.h" 29 30#include <ctype.h> 31#include <err.h> 32#include <errno.h> 33#include <grp.h> 34#include <netdb.h> 35#include <pwd.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <sysexits.h> 40#include <timeconv.h> /* _long_to_time */ 41#include <unistd.h> 42#include <fcntl.h> 43 44#define IPFW_INTERNAL /* Access to protected structures in ip_fw.h. */ 45 46#include <net/ethernet.h> 47#include <net/if.h> 48#include <net/if_dl.h> 49#include <net/pfvar.h> 50#include <net/route.h> /* def. of struct route */ 51#include <netinet/in.h> 52#include <netinet/in_systm.h> 53#include <netinet/ip.h> 54#include <netinet/ip_icmp.h> 55#include <netinet/icmp6.h> 56#include <netinet/ip_fw.h> 57#include <netinet/ip_dummynet.h> 58#include <netinet/tcp.h> 59#include <arpa/inet.h> 60#include <alias.h> 61 62struct cmdline_opts co; /* global options */ 63 64int resvd_set_number = RESVD_SET; 65 66#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 67 if (!ac) \ 68 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 69 if (_substrcmp(*av, "tablearg") == 0) { \ 70 arg = IP_FW_TABLEARG; \ 71 break; \ 72 } \ 73 \ 74 { \ 75 long val; \ 76 char *end; \ 77 \ 78 val = strtol(*av, &end, 10); \ 79 \ 80 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \ 81 errx(EX_DATAERR, "%s: invalid argument: %s", \ 82 match_value(s_x, tok), *av); \ 83 \ 84 if (errno == ERANGE || val < min || val > max) \ 85 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 86 match_value(s_x, tok), min, max, *av); \ 87 \ 88 if (val == IP_FW_TABLEARG) \ 89 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 90 match_value(s_x, tok), *av); \ 91 arg = val; \ 92 } \ 93} while (0) 94 95static void 96PRINT_UINT_ARG(const char *str, uint32_t arg) 97{ 98 if (str != NULL) 99 printf("%s",str); 100 if (arg == IP_FW_TABLEARG) 101 printf("tablearg"); 102 else 103 printf("%u", arg); 104} 105 106static struct _s_x f_tcpflags[] = { 107 { "syn", TH_SYN }, 108 { "fin", TH_FIN }, 109 { "ack", TH_ACK }, 110 { "psh", TH_PUSH }, 111 { "rst", TH_RST }, 112 { "urg", TH_URG }, 113 { "tcp flag", 0 }, 114 { NULL, 0 } 115}; 116 117static struct _s_x f_tcpopts[] = { 118 { "mss", IP_FW_TCPOPT_MSS }, 119 { "maxseg", IP_FW_TCPOPT_MSS }, 120 { "window", IP_FW_TCPOPT_WINDOW }, 121 { "sack", IP_FW_TCPOPT_SACK }, 122 { "ts", IP_FW_TCPOPT_TS }, 123 { "timestamp", IP_FW_TCPOPT_TS }, 124 { "cc", IP_FW_TCPOPT_CC }, 125 { "tcp option", 0 }, 126 { NULL, 0 } 127}; 128 129/* 130 * IP options span the range 0 to 255 so we need to remap them 131 * (though in fact only the low 5 bits are significant). 132 */ 133static struct _s_x f_ipopts[] = { 134 { "ssrr", IP_FW_IPOPT_SSRR}, 135 { "lsrr", IP_FW_IPOPT_LSRR}, 136 { "rr", IP_FW_IPOPT_RR}, 137 { "ts", IP_FW_IPOPT_TS}, 138 { "ip option", 0 }, 139 { NULL, 0 } 140}; 141 142static struct _s_x f_iptos[] = { 143 { "lowdelay", IPTOS_LOWDELAY}, 144 { "throughput", IPTOS_THROUGHPUT}, 145 { "reliability", IPTOS_RELIABILITY}, 146 { "mincost", IPTOS_MINCOST}, 147 { "congestion", IPTOS_ECN_CE}, 148 { "ecntransport", IPTOS_ECN_ECT0}, 149 { "ip tos option", 0}, 150 { NULL, 0 } 151}; 152 153static struct _s_x limit_masks[] = { 154 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 155 {"src-addr", DYN_SRC_ADDR}, 156 {"src-port", DYN_SRC_PORT}, 157 {"dst-addr", DYN_DST_ADDR}, 158 {"dst-port", DYN_DST_PORT}, 159 {NULL, 0} 160}; 161 162/* 163 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 164 * This is only used in this code. 165 */ 166#define IPPROTO_ETHERTYPE 0x1000 167static struct _s_x ether_types[] = { 168 /* 169 * Note, we cannot use "-:&/" in the names because they are field 170 * separators in the type specifications. Also, we use s = NULL as 171 * end-delimiter, because a type of 0 can be legal. 172 */ 173 { "ip", 0x0800 }, 174 { "ipv4", 0x0800 }, 175 { "ipv6", 0x86dd }, 176 { "arp", 0x0806 }, 177 { "rarp", 0x8035 }, 178 { "vlan", 0x8100 }, 179 { "loop", 0x9000 }, 180 { "trail", 0x1000 }, 181 { "at", 0x809b }, 182 { "atalk", 0x809b }, 183 { "aarp", 0x80f3 }, 184 { "pppoe_disc", 0x8863 }, 185 { "pppoe_sess", 0x8864 }, 186 { "ipx_8022", 0x00E0 }, 187 { "ipx_8023", 0x0000 }, 188 { "ipx_ii", 0x8137 }, 189 { "ipx_snap", 0x8137 }, 190 { "ipx", 0x8137 }, 191 { "ns", 0x0600 }, 192 { NULL, 0 } 193}; 194 195enum tokens { 196 TOK_NULL=0, 197 198 TOK_OR, 199 TOK_NOT, 200 TOK_STARTBRACE, 201 TOK_ENDBRACE, 202 203 TOK_ACCEPT, 204 TOK_COUNT, 205 TOK_PIPE, 206 TOK_QUEUE, 207 TOK_DIVERT, 208 TOK_TEE, 209 TOK_NETGRAPH, 210 TOK_NGTEE, 211 TOK_FORWARD, 212 TOK_SKIPTO, 213 TOK_DENY, 214 TOK_REJECT, 215 TOK_RESET, 216 TOK_UNREACH, 217 TOK_CHECKSTATE, 218 TOK_NAT, 219 220 TOK_ALTQ, 221 TOK_LOG, 222 TOK_TAG, 223 TOK_UNTAG, 224 225 TOK_TAGGED, 226 TOK_UID, 227 TOK_GID, 228 TOK_JAIL, 229 TOK_IN, 230 TOK_LIMIT, 231 TOK_KEEPSTATE, 232 TOK_LAYER2, 233 TOK_OUT, 234 TOK_DIVERTED, 235 TOK_DIVERTEDLOOPBACK, 236 TOK_DIVERTEDOUTPUT, 237 TOK_XMIT, 238 TOK_RECV, 239 TOK_VIA, 240 TOK_FRAG, 241 TOK_IPOPTS, 242 TOK_IPLEN, 243 TOK_IPID, 244 TOK_IPPRECEDENCE, 245 TOK_IPTOS, 246 TOK_IPTTL, 247 TOK_IPVER, 248 TOK_ESTAB, 249 TOK_SETUP, 250 TOK_TCPDATALEN, 251 TOK_TCPFLAGS, 252 TOK_TCPOPTS, 253 TOK_TCPSEQ, 254 TOK_TCPACK, 255 TOK_TCPWIN, 256 TOK_ICMPTYPES, 257 TOK_MAC, 258 TOK_MACTYPE, 259 TOK_VERREVPATH, 260 TOK_VERSRCREACH, 261 TOK_ANTISPOOF, 262 TOK_IPSEC, 263 TOK_COMMENT, 264 265 TOK_PLR, 266 TOK_NOERROR, 267 TOK_BUCKETS, 268 TOK_DSTIP, 269 TOK_SRCIP, 270 TOK_DSTPORT, 271 TOK_SRCPORT, 272 TOK_ALL, 273 TOK_MASK, 274 TOK_BW, 275 TOK_DELAY, 276 TOK_RED, 277 TOK_GRED, 278 TOK_DROPTAIL, 279 TOK_PROTO, 280 TOK_WEIGHT, 281 TOK_IP, 282 TOK_IF, 283 TOK_ALOG, 284 TOK_DENY_INC, 285 TOK_SAME_PORTS, 286 TOK_UNREG_ONLY, 287 TOK_RESET_ADDR, 288 TOK_ALIAS_REV, 289 TOK_PROXY_ONLY, 290 TOK_REDIR_ADDR, 291 TOK_REDIR_PORT, 292 TOK_REDIR_PROTO, 293 294 TOK_IPV6, 295 TOK_FLOWID, 296 TOK_ICMP6TYPES, 297 TOK_EXT6HDR, 298 TOK_DSTIP6, 299 TOK_SRCIP6, 300 301 TOK_IPV4, 302 TOK_UNREACH6, 303 TOK_RESET6, 304 305 TOK_FIB, 306 TOK_SETFIB, 307}; 308 309struct _s_x dummynet_params[] = { 310 { "plr", TOK_PLR }, 311 { "noerror", TOK_NOERROR }, 312 { "buckets", TOK_BUCKETS }, 313 { "dst-ip", TOK_DSTIP }, 314 { "src-ip", TOK_SRCIP }, 315 { "dst-port", TOK_DSTPORT }, 316 { "src-port", TOK_SRCPORT }, 317 { "proto", TOK_PROTO }, 318 { "weight", TOK_WEIGHT }, 319 { "all", TOK_ALL }, 320 { "mask", TOK_MASK }, 321 { "droptail", TOK_DROPTAIL }, 322 { "red", TOK_RED }, 323 { "gred", TOK_GRED }, 324 { "bw", TOK_BW }, 325 { "bandwidth", TOK_BW }, 326 { "delay", TOK_DELAY }, 327 { "pipe", TOK_PIPE }, 328 { "queue", TOK_QUEUE }, 329 { "flow-id", TOK_FLOWID}, 330 { "dst-ipv6", TOK_DSTIP6}, 331 { "dst-ip6", TOK_DSTIP6}, 332 { "src-ipv6", TOK_SRCIP6}, 333 { "src-ip6", TOK_SRCIP6}, 334 { "dummynet-params", TOK_NULL }, 335 { NULL, 0 } /* terminator */ 336}; 337 338struct _s_x nat_params[] = { 339 { "ip", TOK_IP }, 340 { "if", TOK_IF }, 341 { "log", TOK_ALOG }, 342 { "deny_in", TOK_DENY_INC }, 343 { "same_ports", TOK_SAME_PORTS }, 344 { "unreg_only", TOK_UNREG_ONLY }, 345 { "reset", TOK_RESET_ADDR }, 346 { "reverse", TOK_ALIAS_REV }, 347 { "proxy_only", TOK_PROXY_ONLY }, 348 { "redirect_addr", TOK_REDIR_ADDR }, 349 { "redirect_port", TOK_REDIR_PORT }, 350 { "redirect_proto", TOK_REDIR_PROTO }, 351 { NULL, 0 } /* terminator */ 352}; 353 354struct _s_x rule_actions[] = { 355 { "accept", TOK_ACCEPT }, 356 { "pass", TOK_ACCEPT }, 357 { "allow", TOK_ACCEPT }, 358 { "permit", TOK_ACCEPT }, 359 { "count", TOK_COUNT }, 360 { "pipe", TOK_PIPE }, 361 { "queue", TOK_QUEUE }, 362 { "divert", TOK_DIVERT }, 363 { "tee", TOK_TEE }, 364 { "netgraph", TOK_NETGRAPH }, 365 { "ngtee", TOK_NGTEE }, 366 { "fwd", TOK_FORWARD }, 367 { "forward", TOK_FORWARD }, 368 { "skipto", TOK_SKIPTO }, 369 { "deny", TOK_DENY }, 370 { "drop", TOK_DENY }, 371 { "reject", TOK_REJECT }, 372 { "reset6", TOK_RESET6 }, 373 { "reset", TOK_RESET }, 374 { "unreach6", TOK_UNREACH6 }, 375 { "unreach", TOK_UNREACH }, 376 { "check-state", TOK_CHECKSTATE }, 377 { "//", TOK_COMMENT }, 378 { "nat", TOK_NAT }, 379 { "setfib", TOK_SETFIB }, 380 { NULL, 0 } /* terminator */ 381}; 382 383struct _s_x rule_action_params[] = { 384 { "altq", TOK_ALTQ }, 385 { "log", TOK_LOG }, 386 { "tag", TOK_TAG }, 387 { "untag", TOK_UNTAG }, 388 { NULL, 0 } /* terminator */ 389}; 390 391struct _s_x rule_options[] = { 392 { "tagged", TOK_TAGGED }, 393 { "uid", TOK_UID }, 394 { "gid", TOK_GID }, 395 { "jail", TOK_JAIL }, 396 { "in", TOK_IN }, 397 { "limit", TOK_LIMIT }, 398 { "keep-state", TOK_KEEPSTATE }, 399 { "bridged", TOK_LAYER2 }, 400 { "layer2", TOK_LAYER2 }, 401 { "out", TOK_OUT }, 402 { "diverted", TOK_DIVERTED }, 403 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 404 { "diverted-output", TOK_DIVERTEDOUTPUT }, 405 { "xmit", TOK_XMIT }, 406 { "recv", TOK_RECV }, 407 { "via", TOK_VIA }, 408 { "fragment", TOK_FRAG }, 409 { "frag", TOK_FRAG }, 410 { "fib", TOK_FIB }, 411 { "ipoptions", TOK_IPOPTS }, 412 { "ipopts", TOK_IPOPTS }, 413 { "iplen", TOK_IPLEN }, 414 { "ipid", TOK_IPID }, 415 { "ipprecedence", TOK_IPPRECEDENCE }, 416 { "iptos", TOK_IPTOS }, 417 { "ipttl", TOK_IPTTL }, 418 { "ipversion", TOK_IPVER }, 419 { "ipver", TOK_IPVER }, 420 { "estab", TOK_ESTAB }, 421 { "established", TOK_ESTAB }, 422 { "setup", TOK_SETUP }, 423 { "tcpdatalen", TOK_TCPDATALEN }, 424 { "tcpflags", TOK_TCPFLAGS }, 425 { "tcpflgs", TOK_TCPFLAGS }, 426 { "tcpoptions", TOK_TCPOPTS }, 427 { "tcpopts", TOK_TCPOPTS }, 428 { "tcpseq", TOK_TCPSEQ }, 429 { "tcpack", TOK_TCPACK }, 430 { "tcpwin", TOK_TCPWIN }, 431 { "icmptype", TOK_ICMPTYPES }, 432 { "icmptypes", TOK_ICMPTYPES }, 433 { "dst-ip", TOK_DSTIP }, 434 { "src-ip", TOK_SRCIP }, 435 { "dst-port", TOK_DSTPORT }, 436 { "src-port", TOK_SRCPORT }, 437 { "proto", TOK_PROTO }, 438 { "MAC", TOK_MAC }, 439 { "mac", TOK_MAC }, 440 { "mac-type", TOK_MACTYPE }, 441 { "verrevpath", TOK_VERREVPATH }, 442 { "versrcreach", TOK_VERSRCREACH }, 443 { "antispoof", TOK_ANTISPOOF }, 444 { "ipsec", TOK_IPSEC }, 445 { "icmp6type", TOK_ICMP6TYPES }, 446 { "icmp6types", TOK_ICMP6TYPES }, 447 { "ext6hdr", TOK_EXT6HDR}, 448 { "flow-id", TOK_FLOWID}, 449 { "ipv6", TOK_IPV6}, 450 { "ip6", TOK_IPV6}, 451 { "ipv4", TOK_IPV4}, 452 { "ip4", TOK_IPV4}, 453 { "dst-ipv6", TOK_DSTIP6}, 454 { "dst-ip6", TOK_DSTIP6}, 455 { "src-ipv6", TOK_SRCIP6}, 456 { "src-ip6", TOK_SRCIP6}, 457 { "//", TOK_COMMENT }, 458 459 { "not", TOK_NOT }, /* pseudo option */ 460 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 461 { "or", TOK_OR }, /* pseudo option */ 462 { "|", /* escape */ TOK_OR }, /* pseudo option */ 463 { "{", TOK_STARTBRACE }, /* pseudo option */ 464 { "(", TOK_STARTBRACE }, /* pseudo option */ 465 { "}", TOK_ENDBRACE }, /* pseudo option */ 466 { ")", TOK_ENDBRACE }, /* pseudo option */ 467 { NULL, 0 } /* terminator */ 468}; 469 470static __inline uint64_t 471align_uint64(uint64_t *pll) { 472 uint64_t ret; 473 474 bcopy (pll, &ret, sizeof(ret)); 475 return ret; 476} 477 478void * 479safe_calloc(size_t number, size_t size) 480{ 481 void *ret = calloc(number, size); 482 483 if (ret == NULL) 484 err(EX_OSERR, "calloc"); 485 return ret; 486} 487 488void * 489safe_realloc(void *ptr, size_t size) 490{ 491 void *ret = realloc(ptr, size); 492 493 if (ret == NULL) 494 err(EX_OSERR, "realloc"); 495 return ret; 496} 497 498/* 499 * conditionally runs the command. 500 */ 501static int 502do_cmd(int optname, void *optval, uintptr_t optlen) 503{ 504 static int s = -1; /* the socket */ 505 int i; 506 507 if (co.test_only) 508 return 0; 509 510 if (s == -1) 511 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 512 if (s < 0) 513 err(EX_UNAVAILABLE, "socket"); 514 515 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 516 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 517 optname == IP_FW_TABLE_GETSIZE || 518 optname == IP_FW_NAT_GET_CONFIG || 519 optname == IP_FW_NAT_GET_LOG) 520 i = getsockopt(s, IPPROTO_IP, optname, optval, 521 (socklen_t *)optlen); 522 else 523 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 524 return i; 525} 526 527/** 528 * match_token takes a table and a string, returns the value associated 529 * with the string (-1 in case of failure). 530 */ 531static int 532match_token(struct _s_x *table, char *string) 533{ 534 struct _s_x *pt; 535 uint i = strlen(string); 536 537 for (pt = table ; i && pt->s != NULL ; pt++) 538 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 539 return pt->x; 540 return -1; 541} 542 543/** 544 * match_value takes a table and a value, returns the string associated 545 * with the value (NULL in case of failure). 546 */ 547static char const * 548match_value(struct _s_x *p, int value) 549{ 550 for (; p->s != NULL; p++) 551 if (p->x == value) 552 return p->s; 553 return NULL; 554} 555 556/* 557 * _substrcmp takes two strings and returns 1 if they do not match, 558 * and 0 if they match exactly or the first string is a sub-string 559 * of the second. A warning is printed to stderr in the case that the 560 * first string is a sub-string of the second. 561 * 562 * This function will be removed in the future through the usual 563 * deprecation process. 564 */ 565int 566_substrcmp(const char *str1, const char* str2) 567{ 568 569 if (strncmp(str1, str2, strlen(str1)) != 0) 570 return 1; 571 572 if (strlen(str1) != strlen(str2)) 573 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 574 str1, str2); 575 return 0; 576} 577 578/* 579 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 580 * and 0 if they match exactly or the second string is a sub-string 581 * of the first. A warning is printed to stderr in the case that the 582 * first string does not match the third. 583 * 584 * This function exists to warn about the bizzare construction 585 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 586 * for "bytes". The problem is that in addition to accepting "by", 587 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 588 * other string beginning with "by". 589 * 590 * This function will be removed in the future through the usual 591 * deprecation process. 592 */ 593static int 594_substrcmp2(const char *str1, const char* str2, const char* str3) 595{ 596 597 if (strncmp(str1, str2, strlen(str2)) != 0) 598 return 1; 599 600 if (strcmp(str1, str3) != 0) 601 warnx("DEPRECATED: '%s' matched '%s'", 602 str1, str3); 603 return 0; 604} 605 606/* 607 * prints one port, symbolic or numeric 608 */ 609static void 610print_port(int proto, uint16_t port) 611{ 612 613 if (proto == IPPROTO_ETHERTYPE) { 614 char const *s; 615 616 if (co.do_resolv && (s = match_value(ether_types, port)) ) 617 printf("%s", s); 618 else 619 printf("0x%04x", port); 620 } else { 621 struct servent *se = NULL; 622 if (co.do_resolv) { 623 struct protoent *pe = getprotobynumber(proto); 624 625 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 626 } 627 if (se) 628 printf("%s", se->s_name); 629 else 630 printf("%d", port); 631 } 632} 633 634struct _s_x _port_name[] = { 635 {"dst-port", O_IP_DSTPORT}, 636 {"src-port", O_IP_SRCPORT}, 637 {"ipid", O_IPID}, 638 {"iplen", O_IPLEN}, 639 {"ipttl", O_IPTTL}, 640 {"mac-type", O_MAC_TYPE}, 641 {"tcpdatalen", O_TCPDATALEN}, 642 {"tagged", O_TAGGED}, 643 {NULL, 0} 644}; 645 646/* 647 * Print the values in a list 16-bit items of the types above. 648 * XXX todo: add support for mask. 649 */ 650static void 651print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 652{ 653 uint16_t *p = cmd->ports; 654 int i; 655 char const *sep; 656 657 if (opcode != 0) { 658 sep = match_value(_port_name, opcode); 659 if (sep == NULL) 660 sep = "???"; 661 printf (" %s", sep); 662 } 663 sep = " "; 664 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 665 printf(sep); 666 print_port(proto, p[0]); 667 if (p[0] != p[1]) { 668 printf("-"); 669 print_port(proto, p[1]); 670 } 671 sep = ","; 672 } 673} 674 675/* 676 * Like strtol, but also translates service names into port numbers 677 * for some protocols. 678 * In particular: 679 * proto == -1 disables the protocol check; 680 * proto == IPPROTO_ETHERTYPE looks up an internal table 681 * proto == <some value in /etc/protocols> matches the values there. 682 * Returns *end == s in case the parameter is not found. 683 */ 684static int 685strtoport(char *s, char **end, int base, int proto) 686{ 687 char *p, *buf; 688 char *s1; 689 int i; 690 691 *end = s; /* default - not found */ 692 if (*s == '\0') 693 return 0; /* not found */ 694 695 if (isdigit(*s)) 696 return strtol(s, end, base); 697 698 /* 699 * find separator. '\\' escapes the next char. 700 */ 701 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 702 if (*s1 == '\\' && s1[1] != '\0') 703 s1++; 704 705 buf = safe_calloc(s1 - s + 1, 1); 706 707 /* 708 * copy into a buffer skipping backslashes 709 */ 710 for (p = s, i = 0; p != s1 ; p++) 711 if (*p != '\\') 712 buf[i++] = *p; 713 buf[i++] = '\0'; 714 715 if (proto == IPPROTO_ETHERTYPE) { 716 i = match_token(ether_types, buf); 717 free(buf); 718 if (i != -1) { /* found */ 719 *end = s1; 720 return i; 721 } 722 } else { 723 struct protoent *pe = NULL; 724 struct servent *se; 725 726 if (proto != 0) 727 pe = getprotobynumber(proto); 728 setservent(1); 729 se = getservbyname(buf, pe ? pe->p_name : NULL); 730 free(buf); 731 if (se != NULL) { 732 *end = s1; 733 return ntohs(se->s_port); 734 } 735 } 736 return 0; /* not found */ 737} 738 739/* 740 * Map between current altq queue id numbers and names. 741 */ 742static int altq_fetched = 0; 743static TAILQ_HEAD(, pf_altq) altq_entries = 744 TAILQ_HEAD_INITIALIZER(altq_entries); 745 746static void 747altq_set_enabled(int enabled) 748{ 749 int pffd; 750 751 pffd = open("/dev/pf", O_RDWR); 752 if (pffd == -1) 753 err(EX_UNAVAILABLE, 754 "altq support opening pf(4) control device"); 755 if (enabled) { 756 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 757 err(EX_UNAVAILABLE, "enabling altq"); 758 } else { 759 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 760 err(EX_UNAVAILABLE, "disabling altq"); 761 } 762 close(pffd); 763} 764 765static void 766altq_fetch(void) 767{ 768 struct pfioc_altq pfioc; 769 struct pf_altq *altq; 770 int pffd; 771 unsigned int mnr; 772 773 if (altq_fetched) 774 return; 775 altq_fetched = 1; 776 pffd = open("/dev/pf", O_RDONLY); 777 if (pffd == -1) { 778 warn("altq support opening pf(4) control device"); 779 return; 780 } 781 bzero(&pfioc, sizeof(pfioc)); 782 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 783 warn("altq support getting queue list"); 784 close(pffd); 785 return; 786 } 787 mnr = pfioc.nr; 788 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 789 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 790 if (errno == EBUSY) 791 break; 792 warn("altq support getting queue list"); 793 close(pffd); 794 return; 795 } 796 if (pfioc.altq.qid == 0) 797 continue; 798 altq = safe_calloc(1, sizeof(*altq)); 799 *altq = pfioc.altq; 800 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 801 } 802 close(pffd); 803} 804 805static u_int32_t 806altq_name_to_qid(const char *name) 807{ 808 struct pf_altq *altq; 809 810 altq_fetch(); 811 TAILQ_FOREACH(altq, &altq_entries, entries) 812 if (strcmp(name, altq->qname) == 0) 813 break; 814 if (altq == NULL) 815 errx(EX_DATAERR, "altq has no queue named `%s'", name); 816 return altq->qid; 817} 818 819static const char * 820altq_qid_to_name(u_int32_t qid) 821{ 822 struct pf_altq *altq; 823 824 altq_fetch(); 825 TAILQ_FOREACH(altq, &altq_entries, entries) 826 if (qid == altq->qid) 827 break; 828 if (altq == NULL) 829 return NULL; 830 return altq->qname; 831} 832 833static void 834fill_altq_qid(u_int32_t *qid, const char *av) 835{ 836 *qid = altq_name_to_qid(av); 837} 838 839/* 840 * Fill the body of the command with the list of port ranges. 841 */ 842static int 843fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 844{ 845 uint16_t a, b, *p = cmd->ports; 846 int i = 0; 847 char *s = av; 848 849 while (*s) { 850 a = strtoport(av, &s, 0, proto); 851 if (s == av) /* empty or invalid argument */ 852 return (0); 853 854 switch (*s) { 855 case '-': /* a range */ 856 av = s + 1; 857 b = strtoport(av, &s, 0, proto); 858 /* Reject expressions like '1-abc' or '1-2-3'. */ 859 if (s == av || (*s != ',' && *s != '\0')) 860 return (0); 861 p[0] = a; 862 p[1] = b; 863 break; 864 case ',': /* comma separated list */ 865 case '\0': 866 p[0] = p[1] = a; 867 break; 868 default: 869 warnx("port list: invalid separator <%c> in <%s>", 870 *s, av); 871 return (0); 872 } 873 874 i++; 875 p += 2; 876 av = s + 1; 877 } 878 if (i > 0) { 879 if (i + 1 > F_LEN_MASK) 880 errx(EX_DATAERR, "too many ports/ranges\n"); 881 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 882 } 883 return (i); 884} 885 886static struct _s_x icmpcodes[] = { 887 { "net", ICMP_UNREACH_NET }, 888 { "host", ICMP_UNREACH_HOST }, 889 { "protocol", ICMP_UNREACH_PROTOCOL }, 890 { "port", ICMP_UNREACH_PORT }, 891 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 892 { "srcfail", ICMP_UNREACH_SRCFAIL }, 893 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 894 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 895 { "isolated", ICMP_UNREACH_ISOLATED }, 896 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 897 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 898 { "tosnet", ICMP_UNREACH_TOSNET }, 899 { "toshost", ICMP_UNREACH_TOSHOST }, 900 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 901 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 902 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 903 { NULL, 0 } 904}; 905 906static void 907fill_reject_code(u_short *codep, char *str) 908{ 909 int val; 910 char *s; 911 912 val = strtoul(str, &s, 0); 913 if (s == str || *s != '\0' || val >= 0x100) 914 val = match_token(icmpcodes, str); 915 if (val < 0) 916 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 917 *codep = val; 918 return; 919} 920 921static void 922print_reject_code(uint16_t code) 923{ 924 char const *s = match_value(icmpcodes, code); 925 926 if (s != NULL) 927 printf("unreach %s", s); 928 else 929 printf("unreach %u", code); 930} 931 932static struct _s_x icmp6codes[] = { 933 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 934 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 935 { "address", ICMP6_DST_UNREACH_ADDR }, 936 { "port", ICMP6_DST_UNREACH_NOPORT }, 937 { NULL, 0 } 938}; 939 940static void 941fill_unreach6_code(u_short *codep, char *str) 942{ 943 int val; 944 char *s; 945 946 val = strtoul(str, &s, 0); 947 if (s == str || *s != '\0' || val >= 0x100) 948 val = match_token(icmp6codes, str); 949 if (val < 0) 950 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 951 *codep = val; 952 return; 953} 954 955static void 956print_unreach6_code(uint16_t code) 957{ 958 char const *s = match_value(icmp6codes, code); 959 960 if (s != NULL) 961 printf("unreach6 %s", s); 962 else 963 printf("unreach6 %u", code); 964} 965 966/* 967 * Returns the number of bits set (from left) in a contiguous bitmask, 968 * or -1 if the mask is not contiguous. 969 * XXX this needs a proper fix. 970 * This effectively works on masks in big-endian (network) format. 971 * when compiled on little endian architectures. 972 * 973 * First bit is bit 7 of the first byte -- note, for MAC addresses, 974 * the first bit on the wire is bit 0 of the first byte. 975 * len is the max length in bits. 976 */ 977static int 978contigmask(uint8_t *p, int len) 979{ 980 int i, n; 981 982 for (i=0; i<len ; i++) 983 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 984 break; 985 for (n=i+1; n < len; n++) 986 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 987 return -1; /* mask not contiguous */ 988 return i; 989} 990 991/* 992 * print flags set/clear in the two bitmasks passed as parameters. 993 * There is a specialized check for f_tcpflags. 994 */ 995static void 996print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 997{ 998 char const *comma = ""; 999 int i; 1000 uint8_t set = cmd->arg1 & 0xff; 1001 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1002 1003 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1004 printf(" setup"); 1005 return; 1006 } 1007 1008 printf(" %s ", name); 1009 for (i=0; list[i].x != 0; i++) { 1010 if (set & list[i].x) { 1011 set &= ~list[i].x; 1012 printf("%s%s", comma, list[i].s); 1013 comma = ","; 1014 } 1015 if (clear & list[i].x) { 1016 clear &= ~list[i].x; 1017 printf("%s!%s", comma, list[i].s); 1018 comma = ","; 1019 } 1020 } 1021} 1022 1023/* 1024 * Print the ip address contained in a command. 1025 */ 1026static void 1027print_ip(ipfw_insn_ip *cmd, char const *s) 1028{ 1029 struct hostent *he = NULL; 1030 int len = F_LEN((ipfw_insn *)cmd); 1031 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1032 1033 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1034 1035 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1036 printf("me"); 1037 return; 1038 } 1039 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1040 cmd->o.opcode == O_IP_DST_LOOKUP) { 1041 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 1042 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1043 printf(",%u", *a); 1044 printf(")"); 1045 return; 1046 } 1047 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1048 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1049 int i, j; 1050 char comma = '{'; 1051 1052 x = cmd->o.arg1 - 1; 1053 x = htonl( ~x ); 1054 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1055 printf("%s/%d", inet_ntoa(cmd->addr), 1056 contigmask((uint8_t *)&x, 32)); 1057 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1058 x &= 0xff; /* base */ 1059 /* 1060 * Print bits and ranges. 1061 * Locate first bit set (i), then locate first bit unset (j). 1062 * If we have 3+ consecutive bits set, then print them as a 1063 * range, otherwise only print the initial bit and rescan. 1064 */ 1065 for (i=0; i < cmd->o.arg1; i++) 1066 if (map[i/32] & (1<<(i & 31))) { 1067 for (j=i+1; j < cmd->o.arg1; j++) 1068 if (!(map[ j/32] & (1<<(j & 31)))) 1069 break; 1070 printf("%c%d", comma, i+x); 1071 if (j>i+2) { /* range has at least 3 elements */ 1072 printf("-%d", j-1+x); 1073 i = j-1; 1074 } 1075 comma = ','; 1076 } 1077 printf("}"); 1078 return; 1079 } 1080 /* 1081 * len == 2 indicates a single IP, whereas lists of 1 or more 1082 * addr/mask pairs have len = (2n+1). We convert len to n so we 1083 * use that to count the number of entries. 1084 */ 1085 for (len = len / 2; len > 0; len--, a += 2) { 1086 int mb = /* mask length */ 1087 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1088 32 : contigmask((uint8_t *)&(a[1]), 32); 1089 if (mb == 32 && co.do_resolv) 1090 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1091 if (he != NULL) /* resolved to name */ 1092 printf("%s", he->h_name); 1093 else if (mb == 0) /* any */ 1094 printf("any"); 1095 else { /* numeric IP followed by some kind of mask */ 1096 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 1097 if (mb < 0) 1098 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 1099 else if (mb < 32) 1100 printf("/%d", mb); 1101 } 1102 if (len > 1) 1103 printf(","); 1104 } 1105} 1106 1107/* 1108 * prints a MAC address/mask pair 1109 */ 1110static void 1111print_mac(uint8_t *addr, uint8_t *mask) 1112{ 1113 int l = contigmask(mask, 48); 1114 1115 if (l == 0) 1116 printf(" any"); 1117 else { 1118 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1119 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1120 if (l == -1) 1121 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1122 mask[0], mask[1], mask[2], 1123 mask[3], mask[4], mask[5]); 1124 else if (l < 48) 1125 printf("/%d", l); 1126 } 1127} 1128 1129static void 1130fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1131{ 1132 uint8_t type; 1133 1134 cmd->d[0] = 0; 1135 while (*av) { 1136 if (*av == ',') 1137 av++; 1138 1139 type = strtoul(av, &av, 0); 1140 1141 if (*av != ',' && *av != '\0') 1142 errx(EX_DATAERR, "invalid ICMP type"); 1143 1144 if (type > 31) 1145 errx(EX_DATAERR, "ICMP type out of range"); 1146 1147 cmd->d[0] |= 1 << type; 1148 } 1149 cmd->o.opcode = O_ICMPTYPE; 1150 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1151} 1152 1153static void 1154print_icmptypes(ipfw_insn_u32 *cmd) 1155{ 1156 int i; 1157 char sep= ' '; 1158 1159 printf(" icmptypes"); 1160 for (i = 0; i < 32; i++) { 1161 if ( (cmd->d[0] & (1 << (i))) == 0) 1162 continue; 1163 printf("%c%d", sep, i); 1164 sep = ','; 1165 } 1166} 1167 1168/* 1169 * Print the ip address contained in a command. 1170 */ 1171static void 1172print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1173{ 1174 struct hostent *he = NULL; 1175 int len = F_LEN((ipfw_insn *) cmd) - 1; 1176 struct in6_addr *a = &(cmd->addr6); 1177 char trad[255]; 1178 1179 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1180 1181 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1182 printf("me6"); 1183 return; 1184 } 1185 if (cmd->o.opcode == O_IP6) { 1186 printf(" ip6"); 1187 return; 1188 } 1189 1190 /* 1191 * len == 4 indicates a single IP, whereas lists of 1 or more 1192 * addr/mask pairs have len = (2n+1). We convert len to n so we 1193 * use that to count the number of entries. 1194 */ 1195 1196 for (len = len / 4; len > 0; len -= 2, a += 2) { 1197 int mb = /* mask length */ 1198 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1199 128 : contigmask((uint8_t *)&(a[1]), 128); 1200 1201 if (mb == 128 && co.do_resolv) 1202 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1203 if (he != NULL) /* resolved to name */ 1204 printf("%s", he->h_name); 1205 else if (mb == 0) /* any */ 1206 printf("any"); 1207 else { /* numeric IP followed by some kind of mask */ 1208 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1209 printf("Error ntop in print_ip6\n"); 1210 printf("%s", trad ); 1211 if (mb < 0) /* XXX not really legal... */ 1212 printf(":%s", 1213 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1214 else if (mb < 128) 1215 printf("/%d", mb); 1216 } 1217 if (len > 2) 1218 printf(","); 1219 } 1220} 1221 1222static void 1223fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1224{ 1225 uint8_t type; 1226 1227 bzero(cmd, sizeof(*cmd)); 1228 while (*av) { 1229 if (*av == ',') 1230 av++; 1231 type = strtoul(av, &av, 0); 1232 if (*av != ',' && *av != '\0') 1233 errx(EX_DATAERR, "invalid ICMP6 type"); 1234 /* 1235 * XXX: shouldn't this be 0xFF? I can't see any reason why 1236 * we shouldn't be able to filter all possiable values 1237 * regardless of the ability of the rest of the kernel to do 1238 * anything useful with them. 1239 */ 1240 if (type > ICMP6_MAXTYPE) 1241 errx(EX_DATAERR, "ICMP6 type out of range"); 1242 cmd->d[type / 32] |= ( 1 << (type % 32)); 1243 } 1244 cmd->o.opcode = O_ICMP6TYPE; 1245 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1246} 1247 1248 1249static void 1250print_icmp6types(ipfw_insn_u32 *cmd) 1251{ 1252 int i, j; 1253 char sep= ' '; 1254 1255 printf(" ip6 icmp6types"); 1256 for (i = 0; i < 7; i++) 1257 for (j=0; j < 32; ++j) { 1258 if ( (cmd->d[i] & (1 << (j))) == 0) 1259 continue; 1260 printf("%c%d", sep, (i*32 + j)); 1261 sep = ','; 1262 } 1263} 1264 1265static void 1266print_flow6id( ipfw_insn_u32 *cmd) 1267{ 1268 uint16_t i, limit = cmd->o.arg1; 1269 char sep = ','; 1270 1271 printf(" flow-id "); 1272 for( i=0; i < limit; ++i) { 1273 if (i == limit - 1) 1274 sep = ' '; 1275 printf("%d%c", cmd->d[i], sep); 1276 } 1277} 1278 1279/* structure and define for the extension header in ipv6 */ 1280static struct _s_x ext6hdrcodes[] = { 1281 { "frag", EXT_FRAGMENT }, 1282 { "hopopt", EXT_HOPOPTS }, 1283 { "route", EXT_ROUTING }, 1284 { "dstopt", EXT_DSTOPTS }, 1285 { "ah", EXT_AH }, 1286 { "esp", EXT_ESP }, 1287 { "rthdr0", EXT_RTHDR0 }, 1288 { "rthdr2", EXT_RTHDR2 }, 1289 { NULL, 0 } 1290}; 1291 1292/* fills command for the extension header filtering */ 1293static int 1294fill_ext6hdr( ipfw_insn *cmd, char *av) 1295{ 1296 int tok; 1297 char *s = av; 1298 1299 cmd->arg1 = 0; 1300 1301 while(s) { 1302 av = strsep( &s, ",") ; 1303 tok = match_token(ext6hdrcodes, av); 1304 switch (tok) { 1305 case EXT_FRAGMENT: 1306 cmd->arg1 |= EXT_FRAGMENT; 1307 break; 1308 1309 case EXT_HOPOPTS: 1310 cmd->arg1 |= EXT_HOPOPTS; 1311 break; 1312 1313 case EXT_ROUTING: 1314 cmd->arg1 |= EXT_ROUTING; 1315 break; 1316 1317 case EXT_DSTOPTS: 1318 cmd->arg1 |= EXT_DSTOPTS; 1319 break; 1320 1321 case EXT_AH: 1322 cmd->arg1 |= EXT_AH; 1323 break; 1324 1325 case EXT_ESP: 1326 cmd->arg1 |= EXT_ESP; 1327 break; 1328 1329 case EXT_RTHDR0: 1330 cmd->arg1 |= EXT_RTHDR0; 1331 break; 1332 1333 case EXT_RTHDR2: 1334 cmd->arg1 |= EXT_RTHDR2; 1335 break; 1336 1337 default: 1338 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1339 break; 1340 } 1341 } 1342 if (cmd->arg1 == 0 ) 1343 return 0; 1344 cmd->opcode = O_EXT_HDR; 1345 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1346 return 1; 1347} 1348 1349static void 1350print_ext6hdr( ipfw_insn *cmd ) 1351{ 1352 char sep = ' '; 1353 1354 printf(" extension header:"); 1355 if (cmd->arg1 & EXT_FRAGMENT ) { 1356 printf("%cfragmentation", sep); 1357 sep = ','; 1358 } 1359 if (cmd->arg1 & EXT_HOPOPTS ) { 1360 printf("%chop options", sep); 1361 sep = ','; 1362 } 1363 if (cmd->arg1 & EXT_ROUTING ) { 1364 printf("%crouting options", sep); 1365 sep = ','; 1366 } 1367 if (cmd->arg1 & EXT_RTHDR0 ) { 1368 printf("%crthdr0", sep); 1369 sep = ','; 1370 } 1371 if (cmd->arg1 & EXT_RTHDR2 ) { 1372 printf("%crthdr2", sep); 1373 sep = ','; 1374 } 1375 if (cmd->arg1 & EXT_DSTOPTS ) { 1376 printf("%cdestination options", sep); 1377 sep = ','; 1378 } 1379 if (cmd->arg1 & EXT_AH ) { 1380 printf("%cauthentication header", sep); 1381 sep = ','; 1382 } 1383 if (cmd->arg1 & EXT_ESP ) { 1384 printf("%cencapsulated security payload", sep); 1385 } 1386} 1387 1388/* 1389 * show_ipfw() prints the body of an ipfw rule. 1390 * Because the standard rule has at least proto src_ip dst_ip, we use 1391 * a helper function to produce these entries if not provided explicitly. 1392 * The first argument is the list of fields we have, the second is 1393 * the list of fields we want to be printed. 1394 * 1395 * Special cases if we have provided a MAC header: 1396 * + if the rule does not contain IP addresses/ports, do not print them; 1397 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1398 * 1399 * Once we have 'have_options', IP header fields are printed as options. 1400 */ 1401#define HAVE_PROTO 0x0001 1402#define HAVE_SRCIP 0x0002 1403#define HAVE_DSTIP 0x0004 1404#define HAVE_PROTO4 0x0008 1405#define HAVE_PROTO6 0x0010 1406#define HAVE_OPTIONS 0x8000 1407 1408#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1409static void 1410show_prerequisites(int *flags, int want, int cmd __unused) 1411{ 1412 if (co.comment_only) 1413 return; 1414 if ( (*flags & HAVE_IP) == HAVE_IP) 1415 *flags |= HAVE_OPTIONS; 1416 1417 if ( !(*flags & HAVE_OPTIONS)) { 1418 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1419 if ( (*flags & HAVE_PROTO4)) 1420 printf(" ip4"); 1421 else if ( (*flags & HAVE_PROTO6)) 1422 printf(" ip6"); 1423 else 1424 printf(" ip"); 1425 } 1426 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1427 printf(" from any"); 1428 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1429 printf(" to any"); 1430 } 1431 *flags |= want; 1432} 1433 1434static void 1435show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1436{ 1437 static int twidth = 0; 1438 int l; 1439 ipfw_insn *cmd, *tagptr = NULL; 1440 const char *comment = NULL; /* ptr to comment if we have one */ 1441 int proto = 0; /* default */ 1442 int flags = 0; /* prerequisites */ 1443 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1444 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1445 int or_block = 0; /* we are in an or block */ 1446 uint32_t set_disable; 1447 1448 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1449 1450 if (set_disable & (1 << rule->set)) { /* disabled */ 1451 if (!co.show_sets) 1452 return; 1453 else 1454 printf("# DISABLED "); 1455 } 1456 printf("%05u ", rule->rulenum); 1457 1458 if (pcwidth>0 || bcwidth>0) 1459 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1460 bcwidth, align_uint64(&rule->bcnt)); 1461 1462 if (co.do_time == 2) 1463 printf("%10u ", rule->timestamp); 1464 else if (co.do_time == 1) { 1465 char timestr[30]; 1466 time_t t = (time_t)0; 1467 1468 if (twidth == 0) { 1469 strcpy(timestr, ctime(&t)); 1470 *strchr(timestr, '\n') = '\0'; 1471 twidth = strlen(timestr); 1472 } 1473 if (rule->timestamp) { 1474 t = _long_to_time(rule->timestamp); 1475 1476 strcpy(timestr, ctime(&t)); 1477 *strchr(timestr, '\n') = '\0'; 1478 printf("%s ", timestr); 1479 } else { 1480 printf("%*s", twidth, " "); 1481 } 1482 } 1483 1484 if (co.show_sets) 1485 printf("set %d ", rule->set); 1486 1487 /* 1488 * print the optional "match probability" 1489 */ 1490 if (rule->cmd_len > 0) { 1491 cmd = rule->cmd ; 1492 if (cmd->opcode == O_PROB) { 1493 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1494 double d = 1.0 * p->d[0]; 1495 1496 d = (d / 0x7fffffff); 1497 printf("prob %f ", d); 1498 } 1499 } 1500 1501 /* 1502 * first print actions 1503 */ 1504 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1505 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1506 switch(cmd->opcode) { 1507 case O_CHECK_STATE: 1508 printf("check-state"); 1509 flags = HAVE_IP; /* avoid printing anything else */ 1510 break; 1511 1512 case O_ACCEPT: 1513 printf("allow"); 1514 break; 1515 1516 case O_COUNT: 1517 printf("count"); 1518 break; 1519 1520 case O_DENY: 1521 printf("deny"); 1522 break; 1523 1524 case O_REJECT: 1525 if (cmd->arg1 == ICMP_REJECT_RST) 1526 printf("reset"); 1527 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1528 printf("reject"); 1529 else 1530 print_reject_code(cmd->arg1); 1531 break; 1532 1533 case O_UNREACH6: 1534 if (cmd->arg1 == ICMP6_UNREACH_RST) 1535 printf("reset6"); 1536 else 1537 print_unreach6_code(cmd->arg1); 1538 break; 1539 1540 case O_SKIPTO: 1541 PRINT_UINT_ARG("skipto ", cmd->arg1); 1542 break; 1543 1544 case O_PIPE: 1545 PRINT_UINT_ARG("pipe ", cmd->arg1); 1546 break; 1547 1548 case O_QUEUE: 1549 PRINT_UINT_ARG("queue ", cmd->arg1); 1550 break; 1551 1552 case O_DIVERT: 1553 PRINT_UINT_ARG("divert ", cmd->arg1); 1554 break; 1555 1556 case O_TEE: 1557 PRINT_UINT_ARG("tee ", cmd->arg1); 1558 break; 1559 1560 case O_NETGRAPH: 1561 PRINT_UINT_ARG("netgraph ", cmd->arg1); 1562 break; 1563 1564 case O_NGTEE: 1565 PRINT_UINT_ARG("ngtee ", cmd->arg1); 1566 break; 1567 1568 case O_FORWARD_IP: 1569 { 1570 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1571 1572 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1573 printf("fwd tablearg"); 1574 } else { 1575 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1576 } 1577 if (s->sa.sin_port) 1578 printf(",%d", s->sa.sin_port); 1579 } 1580 break; 1581 1582 case O_LOG: /* O_LOG is printed last */ 1583 logptr = (ipfw_insn_log *)cmd; 1584 break; 1585 1586 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1587 altqptr = (ipfw_insn_altq *)cmd; 1588 break; 1589 1590 case O_TAG: 1591 tagptr = cmd; 1592 break; 1593 1594 case O_NAT: 1595 PRINT_UINT_ARG("nat ", cmd->arg1); 1596 break; 1597 1598 case O_SETFIB: 1599 PRINT_UINT_ARG("setfib ", cmd->arg1); 1600 break; 1601 1602 default: 1603 printf("** unrecognized action %d len %d ", 1604 cmd->opcode, cmd->len); 1605 } 1606 } 1607 if (logptr) { 1608 if (logptr->max_log > 0) 1609 printf(" log logamount %d", logptr->max_log); 1610 else 1611 printf(" log"); 1612 } 1613 if (altqptr) { 1614 const char *qname; 1615 1616 qname = altq_qid_to_name(altqptr->qid); 1617 if (qname == NULL) 1618 printf(" altq ?<%u>", altqptr->qid); 1619 else 1620 printf(" altq %s", qname); 1621 } 1622 if (tagptr) { 1623 if (tagptr->len & F_NOT) 1624 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1625 else 1626 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1627 } 1628 1629 /* 1630 * then print the body. 1631 */ 1632 for (l = rule->act_ofs, cmd = rule->cmd ; 1633 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1634 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1635 continue; 1636 if (cmd->opcode == O_IP4) { 1637 flags |= HAVE_PROTO4; 1638 break; 1639 } else if (cmd->opcode == O_IP6) { 1640 flags |= HAVE_PROTO6; 1641 break; 1642 } 1643 } 1644 if (rule->_pad & 1) { /* empty rules before options */ 1645 if (!co.do_compact) { 1646 show_prerequisites(&flags, HAVE_PROTO, 0); 1647 printf(" from any to any"); 1648 } 1649 flags |= HAVE_IP | HAVE_OPTIONS; 1650 } 1651 1652 if (co.comment_only) 1653 comment = "..."; 1654 1655 for (l = rule->act_ofs, cmd = rule->cmd ; 1656 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1657 /* useful alias */ 1658 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1659 1660 if (co.comment_only) { 1661 if (cmd->opcode != O_NOP) 1662 continue; 1663 printf(" // %s\n", (char *)(cmd + 1)); 1664 return; 1665 } 1666 1667 show_prerequisites(&flags, 0, cmd->opcode); 1668 1669 switch(cmd->opcode) { 1670 case O_PROB: 1671 break; /* done already */ 1672 1673 case O_PROBE_STATE: 1674 break; /* no need to print anything here */ 1675 1676 case O_IP_SRC: 1677 case O_IP_SRC_LOOKUP: 1678 case O_IP_SRC_MASK: 1679 case O_IP_SRC_ME: 1680 case O_IP_SRC_SET: 1681 show_prerequisites(&flags, HAVE_PROTO, 0); 1682 if (!(flags & HAVE_SRCIP)) 1683 printf(" from"); 1684 if ((cmd->len & F_OR) && !or_block) 1685 printf(" {"); 1686 print_ip((ipfw_insn_ip *)cmd, 1687 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1688 flags |= HAVE_SRCIP; 1689 break; 1690 1691 case O_IP_DST: 1692 case O_IP_DST_LOOKUP: 1693 case O_IP_DST_MASK: 1694 case O_IP_DST_ME: 1695 case O_IP_DST_SET: 1696 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1697 if (!(flags & HAVE_DSTIP)) 1698 printf(" to"); 1699 if ((cmd->len & F_OR) && !or_block) 1700 printf(" {"); 1701 print_ip((ipfw_insn_ip *)cmd, 1702 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1703 flags |= HAVE_DSTIP; 1704 break; 1705 1706 case O_IP6_SRC: 1707 case O_IP6_SRC_MASK: 1708 case O_IP6_SRC_ME: 1709 show_prerequisites(&flags, HAVE_PROTO, 0); 1710 if (!(flags & HAVE_SRCIP)) 1711 printf(" from"); 1712 if ((cmd->len & F_OR) && !or_block) 1713 printf(" {"); 1714 print_ip6((ipfw_insn_ip6 *)cmd, 1715 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1716 flags |= HAVE_SRCIP | HAVE_PROTO; 1717 break; 1718 1719 case O_IP6_DST: 1720 case O_IP6_DST_MASK: 1721 case O_IP6_DST_ME: 1722 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1723 if (!(flags & HAVE_DSTIP)) 1724 printf(" to"); 1725 if ((cmd->len & F_OR) && !or_block) 1726 printf(" {"); 1727 print_ip6((ipfw_insn_ip6 *)cmd, 1728 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1729 flags |= HAVE_DSTIP; 1730 break; 1731 1732 case O_FLOW6ID: 1733 print_flow6id( (ipfw_insn_u32 *) cmd ); 1734 flags |= HAVE_OPTIONS; 1735 break; 1736 1737 case O_IP_DSTPORT: 1738 show_prerequisites(&flags, HAVE_IP, 0); 1739 case O_IP_SRCPORT: 1740 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1741 if ((cmd->len & F_OR) && !or_block) 1742 printf(" {"); 1743 if (cmd->len & F_NOT) 1744 printf(" not"); 1745 print_newports((ipfw_insn_u16 *)cmd, proto, 1746 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1747 break; 1748 1749 case O_PROTO: { 1750 struct protoent *pe = NULL; 1751 1752 if ((cmd->len & F_OR) && !or_block) 1753 printf(" {"); 1754 if (cmd->len & F_NOT) 1755 printf(" not"); 1756 proto = cmd->arg1; 1757 pe = getprotobynumber(cmd->arg1); 1758 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1759 !(flags & HAVE_PROTO)) 1760 show_prerequisites(&flags, 1761 HAVE_IP | HAVE_OPTIONS, 0); 1762 if (flags & HAVE_OPTIONS) 1763 printf(" proto"); 1764 if (pe) 1765 printf(" %s", pe->p_name); 1766 else 1767 printf(" %u", cmd->arg1); 1768 } 1769 flags |= HAVE_PROTO; 1770 break; 1771 1772 default: /*options ... */ 1773 if (!(cmd->len & (F_OR|F_NOT))) 1774 if (((cmd->opcode == O_IP6) && 1775 (flags & HAVE_PROTO6)) || 1776 ((cmd->opcode == O_IP4) && 1777 (flags & HAVE_PROTO4))) 1778 break; 1779 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1780 if ((cmd->len & F_OR) && !or_block) 1781 printf(" {"); 1782 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1783 printf(" not"); 1784 switch(cmd->opcode) { 1785 case O_MACADDR2: { 1786 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1787 1788 printf(" MAC"); 1789 print_mac(m->addr, m->mask); 1790 print_mac(m->addr + 6, m->mask + 6); 1791 } 1792 break; 1793 1794 case O_MAC_TYPE: 1795 print_newports((ipfw_insn_u16 *)cmd, 1796 IPPROTO_ETHERTYPE, cmd->opcode); 1797 break; 1798 1799 1800 case O_FRAG: 1801 printf(" frag"); 1802 break; 1803 1804 case O_FIB: 1805 printf(" fib %u", cmd->arg1 ); 1806 break; 1807 1808 case O_IN: 1809 printf(cmd->len & F_NOT ? " out" : " in"); 1810 break; 1811 1812 case O_DIVERTED: 1813 switch (cmd->arg1) { 1814 case 3: 1815 printf(" diverted"); 1816 break; 1817 case 1: 1818 printf(" diverted-loopback"); 1819 break; 1820 case 2: 1821 printf(" diverted-output"); 1822 break; 1823 default: 1824 printf(" diverted-?<%u>", cmd->arg1); 1825 break; 1826 } 1827 break; 1828 1829 case O_LAYER2: 1830 printf(" layer2"); 1831 break; 1832 case O_XMIT: 1833 case O_RECV: 1834 case O_VIA: 1835 { 1836 char const *s; 1837 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1838 1839 if (cmd->opcode == O_XMIT) 1840 s = "xmit"; 1841 else if (cmd->opcode == O_RECV) 1842 s = "recv"; 1843 else /* if (cmd->opcode == O_VIA) */ 1844 s = "via"; 1845 if (cmdif->name[0] == '\0') 1846 printf(" %s %s", s, 1847 inet_ntoa(cmdif->p.ip)); 1848 else 1849 printf(" %s %s", s, cmdif->name); 1850 1851 break; 1852 } 1853 case O_IPID: 1854 if (F_LEN(cmd) == 1) 1855 printf(" ipid %u", cmd->arg1 ); 1856 else 1857 print_newports((ipfw_insn_u16 *)cmd, 0, 1858 O_IPID); 1859 break; 1860 1861 case O_IPTTL: 1862 if (F_LEN(cmd) == 1) 1863 printf(" ipttl %u", cmd->arg1 ); 1864 else 1865 print_newports((ipfw_insn_u16 *)cmd, 0, 1866 O_IPTTL); 1867 break; 1868 1869 case O_IPVER: 1870 printf(" ipver %u", cmd->arg1 ); 1871 break; 1872 1873 case O_IPPRECEDENCE: 1874 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1875 break; 1876 1877 case O_IPLEN: 1878 if (F_LEN(cmd) == 1) 1879 printf(" iplen %u", cmd->arg1 ); 1880 else 1881 print_newports((ipfw_insn_u16 *)cmd, 0, 1882 O_IPLEN); 1883 break; 1884 1885 case O_IPOPT: 1886 print_flags("ipoptions", cmd, f_ipopts); 1887 break; 1888 1889 case O_IPTOS: 1890 print_flags("iptos", cmd, f_iptos); 1891 break; 1892 1893 case O_ICMPTYPE: 1894 print_icmptypes((ipfw_insn_u32 *)cmd); 1895 break; 1896 1897 case O_ESTAB: 1898 printf(" established"); 1899 break; 1900 1901 case O_TCPDATALEN: 1902 if (F_LEN(cmd) == 1) 1903 printf(" tcpdatalen %u", cmd->arg1 ); 1904 else 1905 print_newports((ipfw_insn_u16 *)cmd, 0, 1906 O_TCPDATALEN); 1907 break; 1908 1909 case O_TCPFLAGS: 1910 print_flags("tcpflags", cmd, f_tcpflags); 1911 break; 1912 1913 case O_TCPOPTS: 1914 print_flags("tcpoptions", cmd, f_tcpopts); 1915 break; 1916 1917 case O_TCPWIN: 1918 printf(" tcpwin %d", ntohs(cmd->arg1)); 1919 break; 1920 1921 case O_TCPACK: 1922 printf(" tcpack %d", ntohl(cmd32->d[0])); 1923 break; 1924 1925 case O_TCPSEQ: 1926 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1927 break; 1928 1929 case O_UID: 1930 { 1931 struct passwd *pwd = getpwuid(cmd32->d[0]); 1932 1933 if (pwd) 1934 printf(" uid %s", pwd->pw_name); 1935 else 1936 printf(" uid %u", cmd32->d[0]); 1937 } 1938 break; 1939 1940 case O_GID: 1941 { 1942 struct group *grp = getgrgid(cmd32->d[0]); 1943 1944 if (grp) 1945 printf(" gid %s", grp->gr_name); 1946 else 1947 printf(" gid %u", cmd32->d[0]); 1948 } 1949 break; 1950 1951 case O_JAIL: 1952 printf(" jail %d", cmd32->d[0]); 1953 break; 1954 1955 case O_VERREVPATH: 1956 printf(" verrevpath"); 1957 break; 1958 1959 case O_VERSRCREACH: 1960 printf(" versrcreach"); 1961 break; 1962 1963 case O_ANTISPOOF: 1964 printf(" antispoof"); 1965 break; 1966 1967 case O_IPSEC: 1968 printf(" ipsec"); 1969 break; 1970 1971 case O_NOP: 1972 comment = (char *)(cmd + 1); 1973 break; 1974 1975 case O_KEEP_STATE: 1976 printf(" keep-state"); 1977 break; 1978 1979 case O_LIMIT: { 1980 struct _s_x *p = limit_masks; 1981 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1982 uint8_t x = c->limit_mask; 1983 char const *comma = " "; 1984 1985 printf(" limit"); 1986 for (; p->x != 0 ; p++) 1987 if ((x & p->x) == p->x) { 1988 x &= ~p->x; 1989 printf("%s%s", comma, p->s); 1990 comma = ","; 1991 } 1992 PRINT_UINT_ARG(" ", c->conn_limit); 1993 break; 1994 } 1995 1996 case O_IP6: 1997 printf(" ip6"); 1998 break; 1999 2000 case O_IP4: 2001 printf(" ip4"); 2002 break; 2003 2004 case O_ICMP6TYPE: 2005 print_icmp6types((ipfw_insn_u32 *)cmd); 2006 break; 2007 2008 case O_EXT_HDR: 2009 print_ext6hdr( (ipfw_insn *) cmd ); 2010 break; 2011 2012 case O_TAGGED: 2013 if (F_LEN(cmd) == 1) 2014 PRINT_UINT_ARG(" tagged ", cmd->arg1); 2015 else 2016 print_newports((ipfw_insn_u16 *)cmd, 0, 2017 O_TAGGED); 2018 break; 2019 2020 default: 2021 printf(" [opcode %d len %d]", 2022 cmd->opcode, cmd->len); 2023 } 2024 } 2025 if (cmd->len & F_OR) { 2026 printf(" or"); 2027 or_block = 1; 2028 } else if (or_block) { 2029 printf(" }"); 2030 or_block = 0; 2031 } 2032 } 2033 show_prerequisites(&flags, HAVE_IP, 0); 2034 if (comment) 2035 printf(" // %s", comment); 2036 printf("\n"); 2037} 2038 2039static void 2040show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 2041{ 2042 struct protoent *pe; 2043 struct in_addr a; 2044 uint16_t rulenum; 2045 char buf[INET6_ADDRSTRLEN]; 2046 2047 if (!co.do_expired) { 2048 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2049 return; 2050 } 2051 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2052 printf("%05d", rulenum); 2053 if (pcwidth>0 || bcwidth>0) 2054 printf(" %*llu %*llu (%ds)", pcwidth, 2055 align_uint64(&d->pcnt), bcwidth, 2056 align_uint64(&d->bcnt), d->expire); 2057 switch (d->dyn_type) { 2058 case O_LIMIT_PARENT: 2059 printf(" PARENT %d", d->count); 2060 break; 2061 case O_LIMIT: 2062 printf(" LIMIT"); 2063 break; 2064 case O_KEEP_STATE: /* bidir, no mask */ 2065 printf(" STATE"); 2066 break; 2067 } 2068 2069 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2070 printf(" %s", pe->p_name); 2071 else 2072 printf(" proto %u", d->id.proto); 2073 2074 if (d->id.addr_type == 4) { 2075 a.s_addr = htonl(d->id.src_ip); 2076 printf(" %s %d", inet_ntoa(a), d->id.src_port); 2077 2078 a.s_addr = htonl(d->id.dst_ip); 2079 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 2080 } else if (d->id.addr_type == 6) { 2081 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2082 sizeof(buf)), d->id.src_port); 2083 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 2084 sizeof(buf)), d->id.dst_port); 2085 } else 2086 printf(" UNKNOWN <-> UNKNOWN\n"); 2087 2088 printf("\n"); 2089} 2090 2091static int 2092sort_q(const void *pa, const void *pb) 2093{ 2094 int rev = (co.do_sort < 0); 2095 int field = rev ? -co.do_sort : co.do_sort; 2096 long long res = 0; 2097 const struct dn_flow_queue *a = pa; 2098 const struct dn_flow_queue *b = pb; 2099 2100 switch (field) { 2101 case 1: /* pkts */ 2102 res = a->len - b->len; 2103 break; 2104 case 2: /* bytes */ 2105 res = a->len_bytes - b->len_bytes; 2106 break; 2107 2108 case 3: /* tot pkts */ 2109 res = a->tot_pkts - b->tot_pkts; 2110 break; 2111 2112 case 4: /* tot bytes */ 2113 res = a->tot_bytes - b->tot_bytes; 2114 break; 2115 } 2116 if (res < 0) 2117 res = -1; 2118 if (res > 0) 2119 res = 1; 2120 return (int)(rev ? res : -res); 2121} 2122 2123static void 2124list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2125{ 2126 int l; 2127 int index_printed, indexes = 0; 2128 char buff[255]; 2129 struct protoent *pe; 2130 2131 if (fs->rq_elements == 0) 2132 return; 2133 2134 if (co.do_sort != 0) 2135 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2136 2137 /* Print IPv4 flows */ 2138 index_printed = 0; 2139 for (l = 0; l < fs->rq_elements; l++) { 2140 struct in_addr ina; 2141 2142 /* XXX: Should check for IPv4 flows */ 2143 if (IS_IP6_FLOW_ID(&(q[l].id))) 2144 continue; 2145 2146 if (!index_printed) { 2147 index_printed = 1; 2148 if (indexes > 0) /* currently a no-op */ 2149 printf("\n"); 2150 indexes++; 2151 printf(" " 2152 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2153 fs->flow_mask.proto, 2154 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2155 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2156 2157 printf("BKT Prot ___Source IP/port____ " 2158 "____Dest. IP/port____ " 2159 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2160 } 2161 2162 printf("%3d ", q[l].hash_slot); 2163 pe = getprotobynumber(q[l].id.proto); 2164 if (pe) 2165 printf("%-4s ", pe->p_name); 2166 else 2167 printf("%4u ", q[l].id.proto); 2168 ina.s_addr = htonl(q[l].id.src_ip); 2169 printf("%15s/%-5d ", 2170 inet_ntoa(ina), q[l].id.src_port); 2171 ina.s_addr = htonl(q[l].id.dst_ip); 2172 printf("%15s/%-5d ", 2173 inet_ntoa(ina), q[l].id.dst_port); 2174 printf("%4qu %8qu %2u %4u %3u\n", 2175 q[l].tot_pkts, q[l].tot_bytes, 2176 q[l].len, q[l].len_bytes, q[l].drops); 2177 if (co.verbose) 2178 printf(" S %20qd F %20qd\n", 2179 q[l].S, q[l].F); 2180 } 2181 2182 /* Print IPv6 flows */ 2183 index_printed = 0; 2184 for (l = 0; l < fs->rq_elements; l++) { 2185 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2186 continue; 2187 2188 if (!index_printed) { 2189 index_printed = 1; 2190 if (indexes > 0) 2191 printf("\n"); 2192 indexes++; 2193 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2194 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2195 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2196 buff, sizeof(buff)); 2197 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2198 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2199 buff, sizeof(buff) ); 2200 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2201 2202 printf("BKT ___Prot___ _flow-id_ " 2203 "______________Source IPv6/port_______________ " 2204 "_______________Dest. IPv6/port_______________ " 2205 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2206 } 2207 printf("%3d ", q[l].hash_slot); 2208 pe = getprotobynumber(q[l].id.proto); 2209 if (pe != NULL) 2210 printf("%9s ", pe->p_name); 2211 else 2212 printf("%9u ", q[l].id.proto); 2213 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2214 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2215 q[l].id.src_port); 2216 printf(" %39s/%-5d ", 2217 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2218 q[l].id.dst_port); 2219 printf(" %4qu %8qu %2u %4u %3u\n", 2220 q[l].tot_pkts, q[l].tot_bytes, 2221 q[l].len, q[l].len_bytes, q[l].drops); 2222 if (co.verbose) 2223 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2224 } 2225} 2226 2227static void 2228print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2229{ 2230 int l; 2231 char qs[30]; 2232 char plr[30]; 2233 char red[90]; /* Display RED parameters */ 2234 2235 l = fs->qsize; 2236 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2237 if (l >= 8192) 2238 sprintf(qs, "%d KB", l / 1024); 2239 else 2240 sprintf(qs, "%d B", l); 2241 } else 2242 sprintf(qs, "%3d sl.", l); 2243 if (fs->plr) 2244 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2245 else 2246 plr[0] = '\0'; 2247 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2248 sprintf(red, 2249 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2250 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2251 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2252 SCALE_VAL(fs->min_th), 2253 SCALE_VAL(fs->max_th), 2254 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2255 else 2256 sprintf(red, "droptail"); 2257 2258 printf("%s %s%s %d queues (%d buckets) %s\n", 2259 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2260} 2261 2262static void 2263list_pipes(void *data, uint nbytes, int ac, char *av[]) 2264{ 2265 int rulenum; 2266 void *next = data; 2267 struct dn_pipe *p = (struct dn_pipe *) data; 2268 struct dn_flow_set *fs; 2269 struct dn_flow_queue *q; 2270 int l; 2271 2272 if (ac > 0) 2273 rulenum = strtoul(*av++, NULL, 10); 2274 else 2275 rulenum = 0; 2276 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2277 double b = p->bandwidth; 2278 char buf[30]; 2279 char prefix[80]; 2280 2281 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE) 2282 break; /* done with pipes, now queues */ 2283 2284 /* 2285 * compute length, as pipe have variable size 2286 */ 2287 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2288 next = (char *)p + l; 2289 nbytes -= l; 2290 2291 if ((rulenum != 0 && rulenum != p->pipe_nr) || co.do_pipe == 2) 2292 continue; 2293 2294 /* 2295 * Print rate (or clocking interface) 2296 */ 2297 if (p->if_name[0] != '\0') 2298 sprintf(buf, "%s", p->if_name); 2299 else if (b == 0) 2300 sprintf(buf, "unlimited"); 2301 else if (b >= 1000000) 2302 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2303 else if (b >= 1000) 2304 sprintf(buf, "%7.3f Kbit/s", b/1000); 2305 else 2306 sprintf(buf, "%7.3f bit/s ", b); 2307 2308 sprintf(prefix, "%05d: %s %4d ms ", 2309 p->pipe_nr, buf, p->delay); 2310 print_flowset_parms(&(p->fs), prefix); 2311 if (co.verbose) 2312 printf(" V %20qd\n", p->V >> MY_M); 2313 2314 q = (struct dn_flow_queue *)(p+1); 2315 list_queues(&(p->fs), q); 2316 } 2317 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2318 char prefix[80]; 2319 2320 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE) 2321 break; 2322 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2323 next = (char *)fs + l; 2324 nbytes -= l; 2325 2326 if (rulenum != 0 && ((rulenum != fs->fs_nr && co.do_pipe == 2) || 2327 (rulenum != fs->parent_nr && co.do_pipe == 1))) { 2328 continue; 2329 } 2330 2331 q = (struct dn_flow_queue *)(fs+1); 2332 sprintf(prefix, "q%05d: weight %d pipe %d ", 2333 fs->fs_nr, fs->weight, fs->parent_nr); 2334 print_flowset_parms(fs, prefix); 2335 list_queues(fs, q); 2336 } 2337} 2338 2339/* 2340 * This one handles all set-related commands 2341 * ipfw set { show | enable | disable } 2342 * ipfw set swap X Y 2343 * ipfw set move X to Y 2344 * ipfw set move rule X to Y 2345 */ 2346void 2347ipfw_sets_handler(int ac, char *av[]) 2348{ 2349 uint32_t set_disable, masks[2]; 2350 int i, nbytes; 2351 uint16_t rulenum; 2352 uint8_t cmd, new_set; 2353 2354 ac--; 2355 av++; 2356 2357 if (!ac) 2358 errx(EX_USAGE, "set needs command"); 2359 if (_substrcmp(*av, "show") == 0) { 2360 void *data; 2361 char const *msg; 2362 2363 nbytes = sizeof(struct ip_fw); 2364 data = safe_calloc(1, nbytes); 2365 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2366 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2367 bcopy(&((struct ip_fw *)data)->next_rule, 2368 &set_disable, sizeof(set_disable)); 2369 2370 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2371 if ((set_disable & (1<<i))) { 2372 printf("%s %d", msg, i); 2373 msg = ""; 2374 } 2375 msg = (set_disable) ? " enable" : "enable"; 2376 for (i = 0; i < RESVD_SET; i++) 2377 if (!(set_disable & (1<<i))) { 2378 printf("%s %d", msg, i); 2379 msg = ""; 2380 } 2381 printf("\n"); 2382 } else if (_substrcmp(*av, "swap") == 0) { 2383 ac--; av++; 2384 if (ac != 2) 2385 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2386 rulenum = atoi(av[0]); 2387 new_set = atoi(av[1]); 2388 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2389 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2390 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2391 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2392 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2393 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2394 } else if (_substrcmp(*av, "move") == 0) { 2395 ac--; av++; 2396 if (ac && _substrcmp(*av, "rule") == 0) { 2397 cmd = 2; 2398 ac--; av++; 2399 } else 2400 cmd = 3; 2401 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2402 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2403 rulenum = atoi(av[0]); 2404 new_set = atoi(av[2]); 2405 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2406 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) ) 2407 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2408 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2409 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2410 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2411 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2412 } else if (_substrcmp(*av, "disable") == 0 || 2413 _substrcmp(*av, "enable") == 0 ) { 2414 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2415 2416 ac--; av++; 2417 masks[0] = masks[1] = 0; 2418 2419 while (ac) { 2420 if (isdigit(**av)) { 2421 i = atoi(*av); 2422 if (i < 0 || i > RESVD_SET) 2423 errx(EX_DATAERR, 2424 "invalid set number %d\n", i); 2425 masks[which] |= (1<<i); 2426 } else if (_substrcmp(*av, "disable") == 0) 2427 which = 0; 2428 else if (_substrcmp(*av, "enable") == 0) 2429 which = 1; 2430 else 2431 errx(EX_DATAERR, 2432 "invalid set command %s\n", *av); 2433 av++; ac--; 2434 } 2435 if ( (masks[0] & masks[1]) != 0 ) 2436 errx(EX_DATAERR, 2437 "cannot enable and disable the same set\n"); 2438 2439 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2440 if (i) 2441 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2442 } else 2443 errx(EX_USAGE, "invalid set command %s\n", *av); 2444} 2445 2446void 2447ipfw_sysctl_handler(int ac, char *av[], int which) 2448{ 2449 ac--; 2450 av++; 2451 2452 if (ac == 0) { 2453 warnx("missing keyword to enable/disable\n"); 2454 } else if (_substrcmp(*av, "firewall") == 0) { 2455 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2456 &which, sizeof(which)); 2457 } else if (_substrcmp(*av, "one_pass") == 0) { 2458 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2459 &which, sizeof(which)); 2460 } else if (_substrcmp(*av, "debug") == 0) { 2461 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2462 &which, sizeof(which)); 2463 } else if (_substrcmp(*av, "verbose") == 0) { 2464 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2465 &which, sizeof(which)); 2466 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2467 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2468 &which, sizeof(which)); 2469 } else if (_substrcmp(*av, "altq") == 0) { 2470 altq_set_enabled(which); 2471 } else { 2472 warnx("unrecognize enable/disable keyword: %s\n", *av); 2473 } 2474} 2475 2476void 2477ipfw_list(int ac, char *av[], int show_counters) 2478{ 2479 struct ip_fw *r; 2480 ipfw_dyn_rule *dynrules, *d; 2481 2482#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2483 char *lim; 2484 void *data = NULL; 2485 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2486 int exitval = EX_OK; 2487 int lac; 2488 char **lav; 2489 u_long rnum, last; 2490 char *endptr; 2491 int seen = 0; 2492 uint8_t set; 2493 2494 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2495 int nalloc = 1024; /* start somewhere... */ 2496 2497 last = 0; 2498 2499 if (co.test_only) { 2500 fprintf(stderr, "Testing only, list disabled\n"); 2501 return; 2502 } 2503 2504 ac--; 2505 av++; 2506 2507 /* get rules or pipes from kernel, resizing array as necessary */ 2508 nbytes = nalloc; 2509 2510 while (nbytes >= nalloc) { 2511 nalloc = nalloc * 2 + 200; 2512 nbytes = nalloc; 2513 data = safe_realloc(data, nbytes); 2514 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2515 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2516 co.do_pipe ? "DUMMYNET" : "FW"); 2517 } 2518 2519 if (co.do_pipe) { 2520 list_pipes(data, nbytes, ac, av); 2521 goto done; 2522 } 2523 2524 /* 2525 * Count static rules. They have variable size so we 2526 * need to scan the list to count them. 2527 */ 2528 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2529 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim; 2530 ++nstat, r = NEXT(r) ) 2531 ; /* nothing */ 2532 2533 /* 2534 * Count dynamic rules. This is easier as they have 2535 * fixed size. 2536 */ 2537 r = NEXT(r); 2538 dynrules = (ipfw_dyn_rule *)r ; 2539 n = (char *)r - (char *)data; 2540 ndyn = (nbytes - n) / sizeof *dynrules; 2541 2542 /* if showing stats, figure out column widths ahead of time */ 2543 bcwidth = pcwidth = 0; 2544 if (show_counters) { 2545 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2546 /* skip rules from another set */ 2547 if (co.use_set && r->set != co.use_set - 1) 2548 continue; 2549 2550 /* packet counter */ 2551 width = snprintf(NULL, 0, "%llu", 2552 align_uint64(&r->pcnt)); 2553 if (width > pcwidth) 2554 pcwidth = width; 2555 2556 /* byte counter */ 2557 width = snprintf(NULL, 0, "%llu", 2558 align_uint64(&r->bcnt)); 2559 if (width > bcwidth) 2560 bcwidth = width; 2561 } 2562 } 2563 if (co.do_dynamic && ndyn) { 2564 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2565 if (co.use_set) { 2566 /* skip rules from another set */ 2567 bcopy((char *)&d->rule + sizeof(uint16_t), 2568 &set, sizeof(uint8_t)); 2569 if (set != co.use_set - 1) 2570 continue; 2571 } 2572 width = snprintf(NULL, 0, "%llu", 2573 align_uint64(&d->pcnt)); 2574 if (width > pcwidth) 2575 pcwidth = width; 2576 2577 width = snprintf(NULL, 0, "%llu", 2578 align_uint64(&d->bcnt)); 2579 if (width > bcwidth) 2580 bcwidth = width; 2581 } 2582 } 2583 /* if no rule numbers were specified, list all rules */ 2584 if (ac == 0) { 2585 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2586 if (co.use_set && r->set != co.use_set - 1) 2587 continue; 2588 show_ipfw(r, pcwidth, bcwidth); 2589 } 2590 2591 if (co.do_dynamic && ndyn) { 2592 printf("## Dynamic rules (%d):\n", ndyn); 2593 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2594 if (co.use_set) { 2595 bcopy((char *)&d->rule + sizeof(uint16_t), 2596 &set, sizeof(uint8_t)); 2597 if (set != co.use_set - 1) 2598 continue; 2599 } 2600 show_dyn_ipfw(d, pcwidth, bcwidth); 2601 } 2602 } 2603 goto done; 2604 } 2605 2606 /* display specific rules requested on command line */ 2607 2608 for (lac = ac, lav = av; lac != 0; lac--) { 2609 /* convert command line rule # */ 2610 last = rnum = strtoul(*lav++, &endptr, 10); 2611 if (*endptr == '-') 2612 last = strtoul(endptr+1, &endptr, 10); 2613 if (*endptr) { 2614 exitval = EX_USAGE; 2615 warnx("invalid rule number: %s", *(lav - 1)); 2616 continue; 2617 } 2618 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2619 if (r->rulenum > last) 2620 break; 2621 if (co.use_set && r->set != co.use_set - 1) 2622 continue; 2623 if (r->rulenum >= rnum && r->rulenum <= last) { 2624 show_ipfw(r, pcwidth, bcwidth); 2625 seen = 1; 2626 } 2627 } 2628 if (!seen) { 2629 /* give precedence to other error(s) */ 2630 if (exitval == EX_OK) 2631 exitval = EX_UNAVAILABLE; 2632 warnx("rule %lu does not exist", rnum); 2633 } 2634 } 2635 2636 if (co.do_dynamic && ndyn) { 2637 printf("## Dynamic rules:\n"); 2638 for (lac = ac, lav = av; lac != 0; lac--) { 2639 last = rnum = strtoul(*lav++, &endptr, 10); 2640 if (*endptr == '-') 2641 last = strtoul(endptr+1, &endptr, 10); 2642 if (*endptr) 2643 /* already warned */ 2644 continue; 2645 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2646 uint16_t rulenum; 2647 2648 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2649 if (rulenum > rnum) 2650 break; 2651 if (co.use_set) { 2652 bcopy((char *)&d->rule + sizeof(uint16_t), 2653 &set, sizeof(uint8_t)); 2654 if (set != co.use_set - 1) 2655 continue; 2656 } 2657 if (r->rulenum >= rnum && r->rulenum <= last) 2658 show_dyn_ipfw(d, pcwidth, bcwidth); 2659 } 2660 } 2661 } 2662 2663 ac = 0; 2664 2665done: 2666 free(data); 2667 2668 if (exitval != EX_OK) 2669 exit(exitval); 2670#undef NEXT 2671} 2672 2673static int 2674lookup_host (char *host, struct in_addr *ipaddr) 2675{ 2676 struct hostent *he; 2677 2678 if (!inet_aton(host, ipaddr)) { 2679 if ((he = gethostbyname(host)) == NULL) 2680 return(-1); 2681 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2682 } 2683 return(0); 2684} 2685 2686/* 2687 * fills the addr and mask fields in the instruction as appropriate from av. 2688 * Update length as appropriate. 2689 * The following formats are allowed: 2690 * me returns O_IP_*_ME 2691 * 1.2.3.4 single IP address 2692 * 1.2.3.4:5.6.7.8 address:mask 2693 * 1.2.3.4/24 address/mask 2694 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2695 * We can have multiple comma-separated address/mask entries. 2696 */ 2697static void 2698fill_ip(ipfw_insn_ip *cmd, char *av) 2699{ 2700 int len = 0; 2701 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2702 2703 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2704 2705 if (_substrcmp(av, "any") == 0) 2706 return; 2707 2708 if (_substrcmp(av, "me") == 0) { 2709 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2710 return; 2711 } 2712 2713 if (strncmp(av, "table(", 6) == 0) { 2714 char *p = strchr(av + 6, ','); 2715 2716 if (p) 2717 *p++ = '\0'; 2718 cmd->o.opcode = O_IP_DST_LOOKUP; 2719 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2720 if (p) { 2721 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2722 d[0] = strtoul(p, NULL, 0); 2723 } else 2724 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2725 return; 2726 } 2727 2728 while (av) { 2729 /* 2730 * After the address we can have '/' or ':' indicating a mask, 2731 * ',' indicating another address follows, '{' indicating a 2732 * set of addresses of unspecified size. 2733 */ 2734 char *t = NULL, *p = strpbrk(av, "/:,{"); 2735 int masklen; 2736 char md, nd = '\0'; 2737 2738 if (p) { 2739 md = *p; 2740 *p++ = '\0'; 2741 if ((t = strpbrk(p, ",{")) != NULL) { 2742 nd = *t; 2743 *t = '\0'; 2744 } 2745 } else 2746 md = '\0'; 2747 2748 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2749 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2750 switch (md) { 2751 case ':': 2752 if (!inet_aton(p, (struct in_addr *)&d[1])) 2753 errx(EX_DATAERR, "bad netmask ``%s''", p); 2754 break; 2755 case '/': 2756 masklen = atoi(p); 2757 if (masklen == 0) 2758 d[1] = htonl(0); /* mask */ 2759 else if (masklen > 32) 2760 errx(EX_DATAERR, "bad width ``%s''", p); 2761 else 2762 d[1] = htonl(~0 << (32 - masklen)); 2763 break; 2764 case '{': /* no mask, assume /24 and put back the '{' */ 2765 d[1] = htonl(~0 << (32 - 24)); 2766 *(--p) = md; 2767 break; 2768 2769 case ',': /* single address plus continuation */ 2770 *(--p) = md; 2771 /* FALLTHROUGH */ 2772 case 0: /* initialization value */ 2773 default: 2774 d[1] = htonl(~0); /* force /32 */ 2775 break; 2776 } 2777 d[0] &= d[1]; /* mask base address with mask */ 2778 if (t) 2779 *t = nd; 2780 /* find next separator */ 2781 if (p) 2782 p = strpbrk(p, ",{"); 2783 if (p && *p == '{') { 2784 /* 2785 * We have a set of addresses. They are stored as follows: 2786 * arg1 is the set size (powers of 2, 2..256) 2787 * addr is the base address IN HOST FORMAT 2788 * mask.. is an array of arg1 bits (rounded up to 2789 * the next multiple of 32) with bits set 2790 * for each host in the map. 2791 */ 2792 uint32_t *map = (uint32_t *)&cmd->mask; 2793 int low, high; 2794 int i = contigmask((uint8_t *)&(d[1]), 32); 2795 2796 if (len > 0) 2797 errx(EX_DATAERR, "address set cannot be in a list"); 2798 if (i < 24 || i > 31) 2799 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2800 cmd->o.arg1 = 1<<(32-i); /* map length */ 2801 d[0] = ntohl(d[0]); /* base addr in host format */ 2802 cmd->o.opcode = O_IP_DST_SET; /* default */ 2803 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2804 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2805 map[i] = 0; /* clear map */ 2806 2807 av = p + 1; 2808 low = d[0] & 0xff; 2809 high = low + cmd->o.arg1 - 1; 2810 /* 2811 * Here, i stores the previous value when we specify a range 2812 * of addresses within a mask, e.g. 45-63. i = -1 means we 2813 * have no previous value. 2814 */ 2815 i = -1; /* previous value in a range */ 2816 while (isdigit(*av)) { 2817 char *s; 2818 int a = strtol(av, &s, 0); 2819 2820 if (s == av) { /* no parameter */ 2821 if (*av != '}') 2822 errx(EX_DATAERR, "set not closed\n"); 2823 if (i != -1) 2824 errx(EX_DATAERR, "incomplete range %d-", i); 2825 break; 2826 } 2827 if (a < low || a > high) 2828 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2829 a, low, high); 2830 a -= low; 2831 if (i == -1) /* no previous in range */ 2832 i = a; 2833 else { /* check that range is valid */ 2834 if (i > a) 2835 errx(EX_DATAERR, "invalid range %d-%d", 2836 i+low, a+low); 2837 if (*s == '-') 2838 errx(EX_DATAERR, "double '-' in range"); 2839 } 2840 for (; i <= a; i++) 2841 map[i/32] |= 1<<(i & 31); 2842 i = -1; 2843 if (*s == '-') 2844 i = a; 2845 else if (*s == '}') 2846 break; 2847 av = s+1; 2848 } 2849 return; 2850 } 2851 av = p; 2852 if (av) /* then *av must be a ',' */ 2853 av++; 2854 2855 /* Check this entry */ 2856 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2857 /* 2858 * 'any' turns the entire list into a NOP. 2859 * 'not any' never matches, so it is removed from the 2860 * list unless it is the only item, in which case we 2861 * report an error. 2862 */ 2863 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2864 if (av == NULL && len == 0) /* only this entry */ 2865 errx(EX_DATAERR, "not any never matches"); 2866 } 2867 /* else do nothing and skip this entry */ 2868 return; 2869 } 2870 /* A single IP can be stored in an optimized format */ 2871 if (d[1] == ~0 && av == NULL && len == 0) { 2872 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2873 return; 2874 } 2875 len += 2; /* two words... */ 2876 d += 2; 2877 } /* end while */ 2878 if (len + 1 > F_LEN_MASK) 2879 errx(EX_DATAERR, "address list too long"); 2880 cmd->o.len |= len+1; 2881} 2882 2883 2884/* Try to find ipv6 address by hostname */ 2885static int 2886lookup_host6 (char *host, struct in6_addr *ip6addr) 2887{ 2888 struct hostent *he; 2889 2890 if (!inet_pton(AF_INET6, host, ip6addr)) { 2891 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2892 return(-1); 2893 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2894 } 2895 return(0); 2896} 2897 2898 2899/* n2mask sets n bits of the mask */ 2900static void 2901n2mask(struct in6_addr *mask, int n) 2902{ 2903 static int minimask[9] = 2904 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2905 u_char *p; 2906 2907 memset(mask, 0, sizeof(struct in6_addr)); 2908 p = (u_char *) mask; 2909 for (; n > 0; p++, n -= 8) { 2910 if (n >= 8) 2911 *p = 0xff; 2912 else 2913 *p = minimask[n]; 2914 } 2915 return; 2916} 2917 2918 2919/* 2920 * fill the addr and mask fields in the instruction as appropriate from av. 2921 * Update length as appropriate. 2922 * The following formats are allowed: 2923 * any matches any IP6. Actually returns an empty instruction. 2924 * me returns O_IP6_*_ME 2925 * 2926 * 03f1::234:123:0342 single IP6 addres 2927 * 03f1::234:123:0342/24 address/mask 2928 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2929 * 2930 * Set of address (as in ipv6) not supported because ipv6 address 2931 * are typically random past the initial prefix. 2932 * Return 1 on success, 0 on failure. 2933 */ 2934static int 2935fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2936{ 2937 int len = 0; 2938 struct in6_addr *d = &(cmd->addr6); 2939 /* 2940 * Needed for multiple address. 2941 * Note d[1] points to struct in6_add r mask6 of cmd 2942 */ 2943 2944 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2945 2946 if (strcmp(av, "any") == 0) 2947 return (1); 2948 2949 2950 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2951 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2952 return (1); 2953 } 2954 2955 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2956 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2957 return (1); 2958 } 2959 2960 av = strdup(av); 2961 while (av) { 2962 /* 2963 * After the address we can have '/' indicating a mask, 2964 * or ',' indicating another address follows. 2965 */ 2966 2967 char *p; 2968 int masklen; 2969 char md = '\0'; 2970 2971 if ((p = strpbrk(av, "/,")) ) { 2972 md = *p; /* save the separator */ 2973 *p = '\0'; /* terminate address string */ 2974 p++; /* and skip past it */ 2975 } 2976 /* now p points to NULL, mask or next entry */ 2977 2978 /* lookup stores address in *d as a side effect */ 2979 if (lookup_host6(av, d) != 0) { 2980 /* XXX: failed. Free memory and go */ 2981 errx(EX_DATAERR, "bad address \"%s\"", av); 2982 } 2983 /* next, look at the mask, if any */ 2984 masklen = (md == '/') ? atoi(p) : 128; 2985 if (masklen > 128 || masklen < 0) 2986 errx(EX_DATAERR, "bad width \"%s\''", p); 2987 else 2988 n2mask(&d[1], masklen); 2989 2990 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2991 2992 /* find next separator */ 2993 2994 if (md == '/') { /* find separator past the mask */ 2995 p = strpbrk(p, ","); 2996 if (p != NULL) 2997 p++; 2998 } 2999 av = p; 3000 3001 /* Check this entry */ 3002 if (masklen == 0) { 3003 /* 3004 * 'any' turns the entire list into a NOP. 3005 * 'not any' never matches, so it is removed from the 3006 * list unless it is the only item, in which case we 3007 * report an error. 3008 */ 3009 if (cmd->o.len & F_NOT && av == NULL && len == 0) 3010 errx(EX_DATAERR, "not any never matches"); 3011 continue; 3012 } 3013 3014 /* 3015 * A single IP can be stored alone 3016 */ 3017 if (masklen == 128 && av == NULL && len == 0) { 3018 len = F_INSN_SIZE(struct in6_addr); 3019 break; 3020 } 3021 3022 /* Update length and pointer to arguments */ 3023 len += F_INSN_SIZE(struct in6_addr)*2; 3024 d += 2; 3025 } /* end while */ 3026 3027 /* 3028 * Total length of the command, remember that 1 is the size of 3029 * the base command. 3030 */ 3031 if (len + 1 > F_LEN_MASK) 3032 errx(EX_DATAERR, "address list too long"); 3033 cmd->o.len |= len+1; 3034 free(av); 3035 return (1); 3036} 3037 3038/* 3039 * fills command for ipv6 flow-id filtering 3040 * note that the 20 bit flow number is stored in a array of u_int32_t 3041 * it's supported lists of flow-id, so in the o.arg1 we store how many 3042 * additional flow-id we want to filter, the basic is 1 3043 */ 3044static void 3045fill_flow6( ipfw_insn_u32 *cmd, char *av ) 3046{ 3047 u_int32_t type; /* Current flow number */ 3048 u_int16_t nflow = 0; /* Current flow index */ 3049 char *s = av; 3050 cmd->d[0] = 0; /* Initializing the base number*/ 3051 3052 while (s) { 3053 av = strsep( &s, ",") ; 3054 type = strtoul(av, &av, 0); 3055 if (*av != ',' && *av != '\0') 3056 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3057 if (type > 0xfffff) 3058 errx(EX_DATAERR, "flow number out of range %s", av); 3059 cmd->d[nflow] |= type; 3060 nflow++; 3061 } 3062 if( nflow > 0 ) { 3063 cmd->o.opcode = O_FLOW6ID; 3064 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 3065 cmd->o.arg1 = nflow; 3066 } 3067 else { 3068 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3069 } 3070} 3071 3072static ipfw_insn * 3073add_srcip6(ipfw_insn *cmd, char *av) 3074{ 3075 3076 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3077 if (F_LEN(cmd) == 0) { /* any */ 3078 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3079 cmd->opcode = O_IP6_SRC_ME; 3080 } else if (F_LEN(cmd) == 3081 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3082 /* single IP, no mask*/ 3083 cmd->opcode = O_IP6_SRC; 3084 } else { /* addr/mask opt */ 3085 cmd->opcode = O_IP6_SRC_MASK; 3086 } 3087 return cmd; 3088} 3089 3090static ipfw_insn * 3091add_dstip6(ipfw_insn *cmd, char *av) 3092{ 3093 3094 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3095 if (F_LEN(cmd) == 0) { /* any */ 3096 } else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3097 cmd->opcode = O_IP6_DST_ME; 3098 } else if (F_LEN(cmd) == 3099 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3100 /* single IP, no mask*/ 3101 cmd->opcode = O_IP6_DST; 3102 } else { /* addr/mask opt */ 3103 cmd->opcode = O_IP6_DST_MASK; 3104 } 3105 return cmd; 3106} 3107 3108 3109/* 3110 * helper function to process a set of flags and set bits in the 3111 * appropriate masks. 3112 */ 3113static void 3114fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3115 struct _s_x *flags, char *p) 3116{ 3117 uint8_t set=0, clear=0; 3118 3119 while (p && *p) { 3120 char *q; /* points to the separator */ 3121 int val; 3122 uint8_t *which; /* mask we are working on */ 3123 3124 if (*p == '!') { 3125 p++; 3126 which = &clear; 3127 } else 3128 which = &set; 3129 q = strchr(p, ','); 3130 if (q) 3131 *q++ = '\0'; 3132 val = match_token(flags, p); 3133 if (val <= 0) 3134 errx(EX_DATAERR, "invalid flag %s", p); 3135 *which |= (uint8_t)val; 3136 p = q; 3137 } 3138 cmd->opcode = opcode; 3139 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3140 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3141} 3142 3143 3144void 3145ipfw_delete(int ac, char *av[]) 3146{ 3147 uint32_t rulenum; 3148 struct dn_pipe p; 3149 int i; 3150 int exitval = EX_OK; 3151 int do_set = 0; 3152 3153 memset(&p, 0, sizeof p); 3154 3155 av++; ac--; 3156 NEED1("missing rule specification"); 3157 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3158 /* Do not allow using the following syntax: 3159 * ipfw set N delete set M 3160 */ 3161 if (co.use_set) 3162 errx(EX_DATAERR, "invalid syntax"); 3163 do_set = 1; /* delete set */ 3164 ac--; av++; 3165 } 3166 3167 /* Rule number */ 3168 while (ac && isdigit(**av)) { 3169 i = atoi(*av); av++; ac--; 3170 if (co.do_nat) { 3171 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3172 if (exitval) { 3173 exitval = EX_UNAVAILABLE; 3174 warn("rule %u not available", i); 3175 } 3176 } else if (co.do_pipe) { 3177 if (co.do_pipe == 1) 3178 p.pipe_nr = i; 3179 else 3180 p.fs.fs_nr = i; 3181 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3182 if (i) { 3183 exitval = 1; 3184 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3185 co.do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3186 } 3187 } else { 3188 if (co.use_set) 3189 rulenum = (i & 0xffff) | (5 << 24) | 3190 ((co.use_set - 1) << 16); 3191 else 3192 rulenum = (i & 0xffff) | (do_set << 24); 3193 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3194 if (i) { 3195 exitval = EX_UNAVAILABLE; 3196 warn("rule %u: setsockopt(IP_FW_DEL)", 3197 rulenum); 3198 } 3199 } 3200 } 3201 if (exitval != EX_OK) 3202 exit(exitval); 3203} 3204 3205 3206/* 3207 * fill the interface structure. We do not check the name as we can 3208 * create interfaces dynamically, so checking them at insert time 3209 * makes relatively little sense. 3210 * Interface names containing '*', '?', or '[' are assumed to be shell 3211 * patterns which match interfaces. 3212 */ 3213static void 3214fill_iface(ipfw_insn_if *cmd, char *arg) 3215{ 3216 cmd->name[0] = '\0'; 3217 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3218 3219 /* Parse the interface or address */ 3220 if (strcmp(arg, "any") == 0) 3221 cmd->o.len = 0; /* effectively ignore this command */ 3222 else if (!isdigit(*arg)) { 3223 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3224 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3225 } else if (!inet_aton(arg, &cmd->p.ip)) 3226 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3227} 3228 3229/* 3230 * Search for interface with name "ifn", and fill n accordingly: 3231 * 3232 * n->ip ip address of interface "ifn" 3233 * n->if_name copy of interface name "ifn" 3234 */ 3235static void 3236set_addr_dynamic(const char *ifn, struct cfg_nat *n) 3237{ 3238 size_t needed; 3239 int mib[6]; 3240 char *buf, *lim, *next; 3241 struct if_msghdr *ifm; 3242 struct ifa_msghdr *ifam; 3243 struct sockaddr_dl *sdl; 3244 struct sockaddr_in *sin; 3245 int ifIndex, ifMTU; 3246 3247 mib[0] = CTL_NET; 3248 mib[1] = PF_ROUTE; 3249 mib[2] = 0; 3250 mib[3] = AF_INET; 3251 mib[4] = NET_RT_IFLIST; 3252 mib[5] = 0; 3253/* 3254 * Get interface data. 3255 */ 3256 if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1) 3257 err(1, "iflist-sysctl-estimate"); 3258 buf = safe_calloc(1, needed); 3259 if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1) 3260 err(1, "iflist-sysctl-get"); 3261 lim = buf + needed; 3262/* 3263 * Loop through interfaces until one with 3264 * given name is found. This is done to 3265 * find correct interface index for routing 3266 * message processing. 3267 */ 3268 ifIndex = 0; 3269 next = buf; 3270 while (next < lim) { 3271 ifm = (struct if_msghdr *)next; 3272 next += ifm->ifm_msglen; 3273 if (ifm->ifm_version != RTM_VERSION) { 3274 if (co.verbose) 3275 warnx("routing message version %d " 3276 "not understood", ifm->ifm_version); 3277 continue; 3278 } 3279 if (ifm->ifm_type == RTM_IFINFO) { 3280 sdl = (struct sockaddr_dl *)(ifm + 1); 3281 if (strlen(ifn) == sdl->sdl_nlen && 3282 strncmp(ifn, sdl->sdl_data, sdl->sdl_nlen) == 0) { 3283 ifIndex = ifm->ifm_index; 3284 ifMTU = ifm->ifm_data.ifi_mtu; 3285 break; 3286 } 3287 } 3288 } 3289 if (!ifIndex) 3290 errx(1, "unknown interface name %s", ifn); 3291/* 3292 * Get interface address. 3293 */ 3294 sin = NULL; 3295 while (next < lim) { 3296 ifam = (struct ifa_msghdr *)next; 3297 next += ifam->ifam_msglen; 3298 if (ifam->ifam_version != RTM_VERSION) { 3299 if (co.verbose) 3300 warnx("routing message version %d " 3301 "not understood", ifam->ifam_version); 3302 continue; 3303 } 3304 if (ifam->ifam_type != RTM_NEWADDR) 3305 break; 3306 if (ifam->ifam_addrs & RTA_IFA) { 3307 int i; 3308 char *cp = (char *)(ifam + 1); 3309 3310 for (i = 1; i < RTA_IFA; i <<= 1) { 3311 if (ifam->ifam_addrs & i) 3312 cp += SA_SIZE((struct sockaddr *)cp); 3313 } 3314 if (((struct sockaddr *)cp)->sa_family == AF_INET) { 3315 sin = (struct sockaddr_in *)cp; 3316 break; 3317 } 3318 } 3319 } 3320 if (sin == NULL) 3321 errx(1, "%s: cannot get interface address", ifn); 3322 3323 n->ip = sin->sin_addr; 3324 strncpy(n->if_name, ifn, IF_NAMESIZE); 3325 3326 free(buf); 3327} 3328 3329/* 3330 * XXX - The following functions, macros and definitions come from natd.c: 3331 * it would be better to move them outside natd.c, in a file 3332 * (redirect_support.[ch]?) shared by ipfw and natd, but for now i can live 3333 * with it. 3334 */ 3335 3336/* 3337 * Definition of a port range, and macros to deal with values. 3338 * FORMAT: HI 16-bits == first port in range, 0 == all ports. 3339 * LO 16-bits == number of ports in range 3340 * NOTES: - Port values are not stored in network byte order. 3341 */ 3342 3343#define port_range u_long 3344 3345#define GETLOPORT(x) ((x) >> 0x10) 3346#define GETNUMPORTS(x) ((x) & 0x0000ffff) 3347#define GETHIPORT(x) (GETLOPORT((x)) + GETNUMPORTS((x))) 3348 3349/* Set y to be the low-port value in port_range variable x. */ 3350#define SETLOPORT(x,y) ((x) = ((x) & 0x0000ffff) | ((y) << 0x10)) 3351 3352/* Set y to be the number of ports in port_range variable x. */ 3353#define SETNUMPORTS(x,y) ((x) = ((x) & 0xffff0000) | (y)) 3354 3355static void 3356StrToAddr (const char* str, struct in_addr* addr) 3357{ 3358 struct hostent* hp; 3359 3360 if (inet_aton (str, addr)) 3361 return; 3362 3363 hp = gethostbyname (str); 3364 if (!hp) 3365 errx (1, "unknown host %s", str); 3366 3367 memcpy (addr, hp->h_addr, sizeof (struct in_addr)); 3368} 3369 3370static int 3371StrToPortRange (const char* str, const char* proto, port_range *portRange) 3372{ 3373 char* sep; 3374 struct servent* sp; 3375 char* end; 3376 u_short loPort; 3377 u_short hiPort; 3378 3379 /* First see if this is a service, return corresponding port if so. */ 3380 sp = getservbyname (str,proto); 3381 if (sp) { 3382 SETLOPORT(*portRange, ntohs(sp->s_port)); 3383 SETNUMPORTS(*portRange, 1); 3384 return 0; 3385 } 3386 3387 /* Not a service, see if it's a single port or port range. */ 3388 sep = strchr (str, '-'); 3389 if (sep == NULL) { 3390 SETLOPORT(*portRange, strtol(str, &end, 10)); 3391 if (end != str) { 3392 /* Single port. */ 3393 SETNUMPORTS(*portRange, 1); 3394 return 0; 3395 } 3396 3397 /* Error in port range field. */ 3398 errx (EX_DATAERR, "%s/%s: unknown service", str, proto); 3399 } 3400 3401 /* Port range, get the values and sanity check. */ 3402 sscanf (str, "%hu-%hu", &loPort, &hiPort); 3403 SETLOPORT(*portRange, loPort); 3404 SETNUMPORTS(*portRange, 0); /* Error by default */ 3405 if (loPort <= hiPort) 3406 SETNUMPORTS(*portRange, hiPort - loPort + 1); 3407 3408 if (GETNUMPORTS(*portRange) == 0) 3409 errx (EX_DATAERR, "invalid port range %s", str); 3410 3411 return 0; 3412} 3413 3414static int 3415StrToProto (const char* str) 3416{ 3417 if (!strcmp (str, "tcp")) 3418 return IPPROTO_TCP; 3419 3420 if (!strcmp (str, "udp")) 3421 return IPPROTO_UDP; 3422 3423 errx (EX_DATAERR, "unknown protocol %s. Expected tcp or udp", str); 3424} 3425 3426static int 3427StrToAddrAndPortRange (const char* str, struct in_addr* addr, char* proto, 3428 port_range *portRange) 3429{ 3430 char* ptr; 3431 3432 ptr = strchr (str, ':'); 3433 if (!ptr) 3434 errx (EX_DATAERR, "%s is missing port number", str); 3435 3436 *ptr = '\0'; 3437 ++ptr; 3438 3439 StrToAddr (str, addr); 3440 return StrToPortRange (ptr, proto, portRange); 3441} 3442 3443/* End of stuff taken from natd.c. */ 3444 3445#define INC_ARGCV() do { \ 3446 (*_av)++; \ 3447 (*_ac)--; \ 3448 av = *_av; \ 3449 ac = *_ac; \ 3450} while(0) 3451 3452/* 3453 * The next 3 functions add support for the addr, port and proto redirect and 3454 * their logic is loosely based on SetupAddressRedirect(), SetupPortRedirect() 3455 * and SetupProtoRedirect() from natd.c. 3456 * 3457 * Every setup_* function fills at least one redirect entry 3458 * (struct cfg_redir) and zero or more server pool entry (struct cfg_spool) 3459 * in buf. 3460 * 3461 * The format of data in buf is: 3462 * 3463 * 3464 * cfg_nat cfg_redir cfg_spool ...... cfg_spool 3465 * 3466 * ------------------------------------- ------------ 3467 * | | .....X ... | | | | ..... 3468 * ------------------------------------- ...... ------------ 3469 * ^ 3470 * spool_cnt n=0 ...... n=(X-1) 3471 * 3472 * len points to the amount of available space in buf 3473 * space counts the memory consumed by every function 3474 * 3475 * XXX - Every function get all the argv params so it 3476 * has to check, in optional parameters, that the next 3477 * args is a valid option for the redir entry and not 3478 * another token. Only redir_port and redir_proto are 3479 * affected by this. 3480 */ 3481 3482static int 3483setup_redir_addr(char *spool_buf, int len, 3484 int *_ac, char ***_av) 3485{ 3486 char **av, *sep; /* Token separator. */ 3487 /* Temporary buffer used to hold server pool ip's. */ 3488 char tmp_spool_buf[NAT_BUF_LEN]; 3489 int ac, space, lsnat; 3490 struct cfg_redir *r; 3491 struct cfg_spool *tmp; 3492 3493 av = *_av; 3494 ac = *_ac; 3495 space = 0; 3496 lsnat = 0; 3497 if (len >= SOF_REDIR) { 3498 r = (struct cfg_redir *)spool_buf; 3499 /* Skip cfg_redir at beginning of buf. */ 3500 spool_buf = &spool_buf[SOF_REDIR]; 3501 space = SOF_REDIR; 3502 len -= SOF_REDIR; 3503 } else 3504 goto nospace; 3505 r->mode = REDIR_ADDR; 3506 /* Extract local address. */ 3507 if (ac == 0) 3508 errx(EX_DATAERR, "redirect_addr: missing local address"); 3509 sep = strchr(*av, ','); 3510 if (sep) { /* LSNAT redirection syntax. */ 3511 r->laddr.s_addr = INADDR_NONE; 3512 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3513 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3514 lsnat = 1; 3515 } else 3516 StrToAddr(*av, &r->laddr); 3517 INC_ARGCV(); 3518 3519 /* Extract public address. */ 3520 if (ac == 0) 3521 errx(EX_DATAERR, "redirect_addr: missing public address"); 3522 StrToAddr(*av, &r->paddr); 3523 INC_ARGCV(); 3524 3525 /* Setup LSNAT server pool. */ 3526 if (sep) { 3527 sep = strtok(tmp_spool_buf, ","); 3528 while (sep != NULL) { 3529 tmp = (struct cfg_spool *)spool_buf; 3530 if (len < SOF_SPOOL) 3531 goto nospace; 3532 len -= SOF_SPOOL; 3533 space += SOF_SPOOL; 3534 StrToAddr(sep, &tmp->addr); 3535 tmp->port = ~0; 3536 r->spool_cnt++; 3537 /* Point to the next possible cfg_spool. */ 3538 spool_buf = &spool_buf[SOF_SPOOL]; 3539 sep = strtok(NULL, ","); 3540 } 3541 } 3542 return(space); 3543nospace: 3544 errx(EX_DATAERR, "redirect_addr: buf is too small\n"); 3545} 3546 3547static int 3548setup_redir_port(char *spool_buf, int len, 3549 int *_ac, char ***_av) 3550{ 3551 char **av, *sep, *protoName; 3552 char tmp_spool_buf[NAT_BUF_LEN]; 3553 int ac, space, lsnat; 3554 struct cfg_redir *r; 3555 struct cfg_spool *tmp; 3556 u_short numLocalPorts; 3557 port_range portRange; 3558 3559 av = *_av; 3560 ac = *_ac; 3561 space = 0; 3562 lsnat = 0; 3563 numLocalPorts = 0; 3564 3565 if (len >= SOF_REDIR) { 3566 r = (struct cfg_redir *)spool_buf; 3567 /* Skip cfg_redir at beginning of buf. */ 3568 spool_buf = &spool_buf[SOF_REDIR]; 3569 space = SOF_REDIR; 3570 len -= SOF_REDIR; 3571 } else 3572 goto nospace; 3573 r->mode = REDIR_PORT; 3574 /* 3575 * Extract protocol. 3576 */ 3577 if (ac == 0) 3578 errx (EX_DATAERR, "redirect_port: missing protocol"); 3579 r->proto = StrToProto(*av); 3580 protoName = *av; 3581 INC_ARGCV(); 3582 3583 /* 3584 * Extract local address. 3585 */ 3586 if (ac == 0) 3587 errx (EX_DATAERR, "redirect_port: missing local address"); 3588 3589 sep = strchr(*av, ','); 3590 /* LSNAT redirection syntax. */ 3591 if (sep) { 3592 r->laddr.s_addr = INADDR_NONE; 3593 r->lport = ~0; 3594 numLocalPorts = 1; 3595 /* Preserve av, copy spool servers to tmp_spool_buf. */ 3596 strncpy(tmp_spool_buf, *av, strlen(*av)+1); 3597 lsnat = 1; 3598 } else { 3599 if (StrToAddrAndPortRange (*av, &r->laddr, protoName, 3600 &portRange) != 0) 3601 errx(EX_DATAERR, "redirect_port:" 3602 "invalid local port range"); 3603 3604 r->lport = GETLOPORT(portRange); 3605 numLocalPorts = GETNUMPORTS(portRange); 3606 } 3607 INC_ARGCV(); 3608 3609 /* 3610 * Extract public port and optionally address. 3611 */ 3612 if (ac == 0) 3613 errx (EX_DATAERR, "redirect_port: missing public port"); 3614 3615 sep = strchr (*av, ':'); 3616 if (sep) { 3617 if (StrToAddrAndPortRange (*av, &r->paddr, protoName, 3618 &portRange) != 0) 3619 errx(EX_DATAERR, "redirect_port:" 3620 "invalid public port range"); 3621 } else { 3622 r->paddr.s_addr = INADDR_ANY; 3623 if (StrToPortRange (*av, protoName, &portRange) != 0) 3624 errx(EX_DATAERR, "redirect_port:" 3625 "invalid public port range"); 3626 } 3627 3628 r->pport = GETLOPORT(portRange); 3629 r->pport_cnt = GETNUMPORTS(portRange); 3630 INC_ARGCV(); 3631 3632 /* 3633 * Extract remote address and optionally port. 3634 */ 3635 /* 3636 * NB: isalpha(**av) => we've to check that next parameter is really an 3637 * option for this redirect entry, else stop here processing arg[cv]. 3638 */ 3639 if (ac != 0 && !isalpha(**av)) { 3640 sep = strchr (*av, ':'); 3641 if (sep) { 3642 if (StrToAddrAndPortRange (*av, &r->raddr, protoName, 3643 &portRange) != 0) 3644 errx(EX_DATAERR, "redirect_port:" 3645 "invalid remote port range"); 3646 } else { 3647 SETLOPORT(portRange, 0); 3648 SETNUMPORTS(portRange, 1); 3649 StrToAddr (*av, &r->raddr); 3650 } 3651 INC_ARGCV(); 3652 } else { 3653 SETLOPORT(portRange, 0); 3654 SETNUMPORTS(portRange, 1); 3655 r->raddr.s_addr = INADDR_ANY; 3656 } 3657 r->rport = GETLOPORT(portRange); 3658 r->rport_cnt = GETNUMPORTS(portRange); 3659 3660 /* 3661 * Make sure port ranges match up, then add the redirect ports. 3662 */ 3663 if (numLocalPorts != r->pport_cnt) 3664 errx(EX_DATAERR, "redirect_port:" 3665 "port ranges must be equal in size"); 3666 3667 /* Remote port range is allowed to be '0' which means all ports. */ 3668 if (r->rport_cnt != numLocalPorts && 3669 (r->rport_cnt != 1 || r->rport != 0)) 3670 errx(EX_DATAERR, "redirect_port: remote port must" 3671 "be 0 or equal to local port range in size"); 3672 3673 /* 3674 * Setup LSNAT server pool. 3675 */ 3676 if (lsnat) { 3677 sep = strtok(tmp_spool_buf, ","); 3678 while (sep != NULL) { 3679 tmp = (struct cfg_spool *)spool_buf; 3680 if (len < SOF_SPOOL) 3681 goto nospace; 3682 len -= SOF_SPOOL; 3683 space += SOF_SPOOL; 3684 if (StrToAddrAndPortRange(sep, &tmp->addr, protoName, 3685 &portRange) != 0) 3686 errx(EX_DATAERR, "redirect_port:" 3687 "invalid local port range"); 3688 if (GETNUMPORTS(portRange) != 1) 3689 errx(EX_DATAERR, "redirect_port: local port" 3690 "must be single in this context"); 3691 tmp->port = GETLOPORT(portRange); 3692 r->spool_cnt++; 3693 /* Point to the next possible cfg_spool. */ 3694 spool_buf = &spool_buf[SOF_SPOOL]; 3695 sep = strtok(NULL, ","); 3696 } 3697 } 3698 return (space); 3699nospace: 3700 errx(EX_DATAERR, "redirect_port: buf is too small\n"); 3701} 3702 3703static int 3704setup_redir_proto(char *spool_buf, int len, 3705 int *_ac, char ***_av) 3706{ 3707 char **av; 3708 int ac, space; 3709 struct protoent *protoent; 3710 struct cfg_redir *r; 3711 3712 av = *_av; 3713 ac = *_ac; 3714 if (len >= SOF_REDIR) { 3715 r = (struct cfg_redir *)spool_buf; 3716 /* Skip cfg_redir at beginning of buf. */ 3717 spool_buf = &spool_buf[SOF_REDIR]; 3718 space = SOF_REDIR; 3719 len -= SOF_REDIR; 3720 } else 3721 goto nospace; 3722 r->mode = REDIR_PROTO; 3723 /* 3724 * Extract protocol. 3725 */ 3726 if (ac == 0) 3727 errx(EX_DATAERR, "redirect_proto: missing protocol"); 3728 3729 protoent = getprotobyname(*av); 3730 if (protoent == NULL) 3731 errx(EX_DATAERR, "redirect_proto: unknown protocol %s", *av); 3732 else 3733 r->proto = protoent->p_proto; 3734 3735 INC_ARGCV(); 3736 3737 /* 3738 * Extract local address. 3739 */ 3740 if (ac == 0) 3741 errx(EX_DATAERR, "redirect_proto: missing local address"); 3742 else 3743 StrToAddr(*av, &r->laddr); 3744 3745 INC_ARGCV(); 3746 3747 /* 3748 * Extract optional public address. 3749 */ 3750 if (ac == 0) { 3751 r->paddr.s_addr = INADDR_ANY; 3752 r->raddr.s_addr = INADDR_ANY; 3753 } else { 3754 /* see above in setup_redir_port() */ 3755 if (!isalpha(**av)) { 3756 StrToAddr(*av, &r->paddr); 3757 INC_ARGCV(); 3758 3759 /* 3760 * Extract optional remote address. 3761 */ 3762 /* see above in setup_redir_port() */ 3763 if (ac!=0 && !isalpha(**av)) { 3764 StrToAddr(*av, &r->raddr); 3765 INC_ARGCV(); 3766 } 3767 } 3768 } 3769 return (space); 3770nospace: 3771 errx(EX_DATAERR, "redirect_proto: buf is too small\n"); 3772} 3773 3774static void 3775print_nat_config(unsigned char *buf) 3776{ 3777 struct cfg_nat *n; 3778 int i, cnt, flag, off; 3779 struct cfg_redir *t; 3780 struct cfg_spool *s; 3781 struct protoent *p; 3782 3783 n = (struct cfg_nat *)buf; 3784 flag = 1; 3785 off = sizeof(*n); 3786 printf("ipfw nat %u config", n->id); 3787 if (strlen(n->if_name) != 0) 3788 printf(" if %s", n->if_name); 3789 else if (n->ip.s_addr != 0) 3790 printf(" ip %s", inet_ntoa(n->ip)); 3791 while (n->mode != 0) { 3792 if (n->mode & PKT_ALIAS_LOG) { 3793 printf(" log"); 3794 n->mode &= ~PKT_ALIAS_LOG; 3795 } else if (n->mode & PKT_ALIAS_DENY_INCOMING) { 3796 printf(" deny_in"); 3797 n->mode &= ~PKT_ALIAS_DENY_INCOMING; 3798 } else if (n->mode & PKT_ALIAS_SAME_PORTS) { 3799 printf(" same_ports"); 3800 n->mode &= ~PKT_ALIAS_SAME_PORTS; 3801 } else if (n->mode & PKT_ALIAS_UNREGISTERED_ONLY) { 3802 printf(" unreg_only"); 3803 n->mode &= ~PKT_ALIAS_UNREGISTERED_ONLY; 3804 } else if (n->mode & PKT_ALIAS_RESET_ON_ADDR_CHANGE) { 3805 printf(" reset"); 3806 n->mode &= ~PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3807 } else if (n->mode & PKT_ALIAS_REVERSE) { 3808 printf(" reverse"); 3809 n->mode &= ~PKT_ALIAS_REVERSE; 3810 } else if (n->mode & PKT_ALIAS_PROXY_ONLY) { 3811 printf(" proxy_only"); 3812 n->mode &= ~PKT_ALIAS_PROXY_ONLY; 3813 } 3814 } 3815 /* Print all the redirect's data configuration. */ 3816 for (cnt = 0; cnt < n->redir_cnt; cnt++) { 3817 t = (struct cfg_redir *)&buf[off]; 3818 off += SOF_REDIR; 3819 switch (t->mode) { 3820 case REDIR_ADDR: 3821 printf(" redirect_addr"); 3822 if (t->spool_cnt == 0) 3823 printf(" %s", inet_ntoa(t->laddr)); 3824 else 3825 for (i = 0; i < t->spool_cnt; i++) { 3826 s = (struct cfg_spool *)&buf[off]; 3827 if (i) 3828 printf(","); 3829 else 3830 printf(" "); 3831 printf("%s", inet_ntoa(s->addr)); 3832 off += SOF_SPOOL; 3833 } 3834 printf(" %s", inet_ntoa(t->paddr)); 3835 break; 3836 case REDIR_PORT: 3837 p = getprotobynumber(t->proto); 3838 printf(" redirect_port %s ", p->p_name); 3839 if (!t->spool_cnt) { 3840 printf("%s:%u", inet_ntoa(t->laddr), t->lport); 3841 if (t->pport_cnt > 1) 3842 printf("-%u", t->lport + 3843 t->pport_cnt - 1); 3844 } else 3845 for (i=0; i < t->spool_cnt; i++) { 3846 s = (struct cfg_spool *)&buf[off]; 3847 if (i) 3848 printf(","); 3849 printf("%s:%u", inet_ntoa(s->addr), 3850 s->port); 3851 off += SOF_SPOOL; 3852 } 3853 3854 printf(" "); 3855 if (t->paddr.s_addr) 3856 printf("%s:", inet_ntoa(t->paddr)); 3857 printf("%u", t->pport); 3858 if (!t->spool_cnt && t->pport_cnt > 1) 3859 printf("-%u", t->pport + t->pport_cnt - 1); 3860 3861 if (t->raddr.s_addr) { 3862 printf(" %s", inet_ntoa(t->raddr)); 3863 if (t->rport) { 3864 printf(":%u", t->rport); 3865 if (!t->spool_cnt && t->rport_cnt > 1) 3866 printf("-%u", t->rport + 3867 t->rport_cnt - 1); 3868 } 3869 } 3870 break; 3871 case REDIR_PROTO: 3872 p = getprotobynumber(t->proto); 3873 printf(" redirect_proto %s %s", p->p_name, 3874 inet_ntoa(t->laddr)); 3875 if (t->paddr.s_addr != 0) { 3876 printf(" %s", inet_ntoa(t->paddr)); 3877 if (t->raddr.s_addr) 3878 printf(" %s", inet_ntoa(t->raddr)); 3879 } 3880 break; 3881 default: 3882 errx(EX_DATAERR, "unknown redir mode"); 3883 break; 3884 } 3885 } 3886 printf("\n"); 3887} 3888 3889void 3890ipfw_config_nat(int ac, char **av) 3891{ 3892 struct cfg_nat *n; /* Nat instance configuration. */ 3893 int i, len, off, tok; 3894 char *id, buf[NAT_BUF_LEN]; /* Buffer for serialized data. */ 3895 3896 len = NAT_BUF_LEN; 3897 /* Offset in buf: save space for n at the beginning. */ 3898 off = sizeof(*n); 3899 memset(buf, 0, sizeof(buf)); 3900 n = (struct cfg_nat *)buf; 3901 3902 av++; ac--; 3903 /* Nat id. */ 3904 if (ac && isdigit(**av)) { 3905 id = *av; 3906 i = atoi(*av); 3907 ac--; av++; 3908 n->id = i; 3909 } else 3910 errx(EX_DATAERR, "missing nat id"); 3911 if (ac == 0) 3912 errx(EX_DATAERR, "missing option"); 3913 3914 while (ac > 0) { 3915 tok = match_token(nat_params, *av); 3916 ac--; av++; 3917 switch (tok) { 3918 case TOK_IP: 3919 if (ac == 0) 3920 errx(EX_DATAERR, "missing option"); 3921 if (!inet_aton(av[0], &(n->ip))) 3922 errx(EX_DATAERR, "bad ip address ``%s''", 3923 av[0]); 3924 ac--; av++; 3925 break; 3926 case TOK_IF: 3927 if (ac == 0) 3928 errx(EX_DATAERR, "missing option"); 3929 set_addr_dynamic(av[0], n); 3930 ac--; av++; 3931 break; 3932 case TOK_ALOG: 3933 n->mode |= PKT_ALIAS_LOG; 3934 break; 3935 case TOK_DENY_INC: 3936 n->mode |= PKT_ALIAS_DENY_INCOMING; 3937 break; 3938 case TOK_SAME_PORTS: 3939 n->mode |= PKT_ALIAS_SAME_PORTS; 3940 break; 3941 case TOK_UNREG_ONLY: 3942 n->mode |= PKT_ALIAS_UNREGISTERED_ONLY; 3943 break; 3944 case TOK_RESET_ADDR: 3945 n->mode |= PKT_ALIAS_RESET_ON_ADDR_CHANGE; 3946 break; 3947 case TOK_ALIAS_REV: 3948 n->mode |= PKT_ALIAS_REVERSE; 3949 break; 3950 case TOK_PROXY_ONLY: 3951 n->mode |= PKT_ALIAS_PROXY_ONLY; 3952 break; 3953 /* 3954 * All the setup_redir_* functions work directly in the final 3955 * buffer, see above for details. 3956 */ 3957 case TOK_REDIR_ADDR: 3958 case TOK_REDIR_PORT: 3959 case TOK_REDIR_PROTO: 3960 switch (tok) { 3961 case TOK_REDIR_ADDR: 3962 i = setup_redir_addr(&buf[off], len, &ac, &av); 3963 break; 3964 case TOK_REDIR_PORT: 3965 i = setup_redir_port(&buf[off], len, &ac, &av); 3966 break; 3967 case TOK_REDIR_PROTO: 3968 i = setup_redir_proto(&buf[off], len, &ac, &av); 3969 break; 3970 } 3971 n->redir_cnt++; 3972 off += i; 3973 len -= i; 3974 break; 3975 default: 3976 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3977 } 3978 } 3979 3980 i = do_cmd(IP_FW_NAT_CFG, buf, off); 3981 if (i) 3982 err(1, "setsockopt(%s)", "IP_FW_NAT_CFG"); 3983 3984 if (!co.do_quiet) { 3985 /* After every modification, we show the resultant rule. */ 3986 int _ac = 3; 3987 char *_av[] = {"show", "config", id}; 3988 ipfw_show_nat(_ac, _av); 3989 } 3990} 3991 3992void 3993ipfw_config_pipe(int ac, char **av) 3994{ 3995 struct dn_pipe p; 3996 int i; 3997 char *end; 3998 void *par = NULL; 3999 4000 memset(&p, 0, sizeof p); 4001 4002 av++; ac--; 4003 /* Pipe number */ 4004 if (ac && isdigit(**av)) { 4005 i = atoi(*av); av++; ac--; 4006 if (co.do_pipe == 1) 4007 p.pipe_nr = i; 4008 else 4009 p.fs.fs_nr = i; 4010 } 4011 while (ac > 0) { 4012 double d; 4013 int tok = match_token(dummynet_params, *av); 4014 ac--; av++; 4015 4016 switch(tok) { 4017 case TOK_NOERROR: 4018 p.fs.flags_fs |= DN_NOERROR; 4019 break; 4020 4021 case TOK_PLR: 4022 NEED1("plr needs argument 0..1\n"); 4023 d = strtod(av[0], NULL); 4024 if (d > 1) 4025 d = 1; 4026 else if (d < 0) 4027 d = 0; 4028 p.fs.plr = (int)(d*0x7fffffff); 4029 ac--; av++; 4030 break; 4031 4032 case TOK_QUEUE: 4033 NEED1("queue needs queue size\n"); 4034 end = NULL; 4035 p.fs.qsize = strtoul(av[0], &end, 0); 4036 if (*end == 'K' || *end == 'k') { 4037 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4038 p.fs.qsize *= 1024; 4039 } else if (*end == 'B' || 4040 _substrcmp2(end, "by", "bytes") == 0) { 4041 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 4042 } 4043 ac--; av++; 4044 break; 4045 4046 case TOK_BUCKETS: 4047 NEED1("buckets needs argument\n"); 4048 p.fs.rq_size = strtoul(av[0], NULL, 0); 4049 ac--; av++; 4050 break; 4051 4052 case TOK_MASK: 4053 NEED1("mask needs mask specifier\n"); 4054 /* 4055 * per-flow queue, mask is dst_ip, dst_port, 4056 * src_ip, src_port, proto measured in bits 4057 */ 4058 par = NULL; 4059 4060 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 4061 end = NULL; 4062 4063 while (ac >= 1) { 4064 uint32_t *p32 = NULL; 4065 uint16_t *p16 = NULL; 4066 uint32_t *p20 = NULL; 4067 struct in6_addr *pa6 = NULL; 4068 uint32_t a; 4069 4070 tok = match_token(dummynet_params, *av); 4071 ac--; av++; 4072 switch(tok) { 4073 case TOK_ALL: 4074 /* 4075 * special case, all bits significant 4076 */ 4077 p.fs.flow_mask.dst_ip = ~0; 4078 p.fs.flow_mask.src_ip = ~0; 4079 p.fs.flow_mask.dst_port = ~0; 4080 p.fs.flow_mask.src_port = ~0; 4081 p.fs.flow_mask.proto = ~0; 4082 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 4083 n2mask(&(p.fs.flow_mask.src_ip6), 128); 4084 p.fs.flow_mask.flow_id6 = ~0; 4085 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4086 goto end_mask; 4087 4088 case TOK_DSTIP: 4089 p32 = &p.fs.flow_mask.dst_ip; 4090 break; 4091 4092 case TOK_SRCIP: 4093 p32 = &p.fs.flow_mask.src_ip; 4094 break; 4095 4096 case TOK_DSTIP6: 4097 pa6 = &(p.fs.flow_mask.dst_ip6); 4098 break; 4099 4100 case TOK_SRCIP6: 4101 pa6 = &(p.fs.flow_mask.src_ip6); 4102 break; 4103 4104 case TOK_FLOWID: 4105 p20 = &p.fs.flow_mask.flow_id6; 4106 break; 4107 4108 case TOK_DSTPORT: 4109 p16 = &p.fs.flow_mask.dst_port; 4110 break; 4111 4112 case TOK_SRCPORT: 4113 p16 = &p.fs.flow_mask.src_port; 4114 break; 4115 4116 case TOK_PROTO: 4117 break; 4118 4119 default: 4120 ac++; av--; /* backtrack */ 4121 goto end_mask; 4122 } 4123 if (ac < 1) 4124 errx(EX_USAGE, "mask: value missing"); 4125 if (*av[0] == '/') { 4126 a = strtoul(av[0]+1, &end, 0); 4127 if (pa6 == NULL) 4128 a = (a == 32) ? ~0 : (1 << a) - 1; 4129 } else 4130 a = strtoul(av[0], &end, 0); 4131 if (p32 != NULL) 4132 *p32 = a; 4133 else if (p16 != NULL) { 4134 if (a > 0xFFFF) 4135 errx(EX_DATAERR, 4136 "port mask must be 16 bit"); 4137 *p16 = (uint16_t)a; 4138 } else if (p20 != NULL) { 4139 if (a > 0xfffff) 4140 errx(EX_DATAERR, 4141 "flow_id mask must be 20 bit"); 4142 *p20 = (uint32_t)a; 4143 } else if (pa6 != NULL) { 4144 if (a > 128) 4145 errx(EX_DATAERR, 4146 "in6addr invalid mask len"); 4147 else 4148 n2mask(pa6, a); 4149 } else { 4150 if (a > 0xFF) 4151 errx(EX_DATAERR, 4152 "proto mask must be 8 bit"); 4153 p.fs.flow_mask.proto = (uint8_t)a; 4154 } 4155 if (a != 0) 4156 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 4157 ac--; av++; 4158 } /* end while, config masks */ 4159end_mask: 4160 break; 4161 4162 case TOK_RED: 4163 case TOK_GRED: 4164 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 4165 p.fs.flags_fs |= DN_IS_RED; 4166 if (tok == TOK_GRED) 4167 p.fs.flags_fs |= DN_IS_GENTLE_RED; 4168 /* 4169 * the format for parameters is w_q/min_th/max_th/max_p 4170 */ 4171 if ((end = strsep(&av[0], "/"))) { 4172 double w_q = strtod(end, NULL); 4173 if (w_q > 1 || w_q <= 0) 4174 errx(EX_DATAERR, "0 < w_q <= 1"); 4175 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 4176 } 4177 if ((end = strsep(&av[0], "/"))) { 4178 p.fs.min_th = strtoul(end, &end, 0); 4179 if (*end == 'K' || *end == 'k') 4180 p.fs.min_th *= 1024; 4181 } 4182 if ((end = strsep(&av[0], "/"))) { 4183 p.fs.max_th = strtoul(end, &end, 0); 4184 if (*end == 'K' || *end == 'k') 4185 p.fs.max_th *= 1024; 4186 } 4187 if ((end = strsep(&av[0], "/"))) { 4188 double max_p = strtod(end, NULL); 4189 if (max_p > 1 || max_p <= 0) 4190 errx(EX_DATAERR, "0 < max_p <= 1"); 4191 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 4192 } 4193 ac--; av++; 4194 break; 4195 4196 case TOK_DROPTAIL: 4197 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 4198 break; 4199 4200 case TOK_BW: 4201 NEED1("bw needs bandwidth or interface\n"); 4202 if (co.do_pipe != 1) 4203 errx(EX_DATAERR, "bandwidth only valid for pipes"); 4204 /* 4205 * set clocking interface or bandwidth value 4206 */ 4207 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 4208 int l = sizeof(p.if_name)-1; 4209 /* interface name */ 4210 strncpy(p.if_name, av[0], l); 4211 p.if_name[l] = '\0'; 4212 p.bandwidth = 0; 4213 } else { 4214 p.if_name[0] = '\0'; 4215 p.bandwidth = strtoul(av[0], &end, 0); 4216 if (*end == 'K' || *end == 'k') { 4217 end++; 4218 p.bandwidth *= 1000; 4219 } else if (*end == 'M') { 4220 end++; 4221 p.bandwidth *= 1000000; 4222 } 4223 if ((*end == 'B' && 4224 _substrcmp2(end, "Bi", "Bit/s") != 0) || 4225 _substrcmp2(end, "by", "bytes") == 0) 4226 p.bandwidth *= 8; 4227 if (p.bandwidth < 0) 4228 errx(EX_DATAERR, "bandwidth too large"); 4229 } 4230 ac--; av++; 4231 break; 4232 4233 case TOK_DELAY: 4234 if (co.do_pipe != 1) 4235 errx(EX_DATAERR, "delay only valid for pipes"); 4236 NEED1("delay needs argument 0..10000ms\n"); 4237 p.delay = strtoul(av[0], NULL, 0); 4238 ac--; av++; 4239 break; 4240 4241 case TOK_WEIGHT: 4242 if (co.do_pipe == 1) 4243 errx(EX_DATAERR,"weight only valid for queues"); 4244 NEED1("weight needs argument 0..100\n"); 4245 p.fs.weight = strtoul(av[0], &end, 0); 4246 ac--; av++; 4247 break; 4248 4249 case TOK_PIPE: 4250 if (co.do_pipe == 1) 4251 errx(EX_DATAERR,"pipe only valid for queues"); 4252 NEED1("pipe needs pipe_number\n"); 4253 p.fs.parent_nr = strtoul(av[0], &end, 0); 4254 ac--; av++; 4255 break; 4256 4257 default: 4258 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 4259 } 4260 } 4261 if (co.do_pipe == 1) { 4262 if (p.pipe_nr == 0) 4263 errx(EX_DATAERR, "pipe_nr must be > 0"); 4264 if (p.delay > 10000) 4265 errx(EX_DATAERR, "delay must be < 10000"); 4266 } else { /* co.do_pipe == 2, queue */ 4267 if (p.fs.parent_nr == 0) 4268 errx(EX_DATAERR, "pipe must be > 0"); 4269 if (p.fs.weight >100) 4270 errx(EX_DATAERR, "weight must be <= 100"); 4271 } 4272 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 4273 size_t len; 4274 long limit; 4275 4276 len = sizeof(limit); 4277 if (sysctlbyname("net.inet.ip.dummynet.pipe_byte_limit", 4278 &limit, &len, NULL, 0) == -1) 4279 limit = 1024*1024; 4280 if (p.fs.qsize > limit) 4281 errx(EX_DATAERR, "queue size must be < %ldB", limit); 4282 } else { 4283 size_t len; 4284 long limit; 4285 4286 len = sizeof(limit); 4287 if (sysctlbyname("net.inet.ip.dummynet.pipe_slot_limit", 4288 &limit, &len, NULL, 0) == -1) 4289 limit = 100; 4290 if (p.fs.qsize > limit) 4291 errx(EX_DATAERR, "2 <= queue size <= %ld", limit); 4292 } 4293 if (p.fs.flags_fs & DN_IS_RED) { 4294 size_t len; 4295 int lookup_depth, avg_pkt_size; 4296 double s, idle, weight, w_q; 4297 struct clockinfo ck; 4298 int t; 4299 4300 if (p.fs.min_th >= p.fs.max_th) 4301 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 4302 p.fs.min_th, p.fs.max_th); 4303 if (p.fs.max_th == 0) 4304 errx(EX_DATAERR, "max_th must be > 0"); 4305 4306 len = sizeof(int); 4307 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 4308 &lookup_depth, &len, NULL, 0) == -1) 4309 errx(1, "sysctlbyname(\"%s\")", 4310 "net.inet.ip.dummynet.red_lookup_depth"); 4311 if (lookup_depth == 0) 4312 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 4313 " must be greater than zero"); 4314 4315 len = sizeof(int); 4316 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 4317 &avg_pkt_size, &len, NULL, 0) == -1) 4318 4319 errx(1, "sysctlbyname(\"%s\")", 4320 "net.inet.ip.dummynet.red_avg_pkt_size"); 4321 if (avg_pkt_size == 0) 4322 errx(EX_DATAERR, 4323 "net.inet.ip.dummynet.red_avg_pkt_size must" 4324 " be greater than zero"); 4325 4326 len = sizeof(struct clockinfo); 4327 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 4328 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 4329 4330 /* 4331 * Ticks needed for sending a medium-sized packet. 4332 * Unfortunately, when we are configuring a WF2Q+ queue, we 4333 * do not have bandwidth information, because that is stored 4334 * in the parent pipe, and also we have multiple queues 4335 * competing for it. So we set s=0, which is not very 4336 * correct. But on the other hand, why do we want RED with 4337 * WF2Q+ ? 4338 */ 4339 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 4340 s = 0; 4341 else 4342 s = (double)ck.hz * avg_pkt_size * 8 / p.bandwidth; 4343 4344 /* 4345 * max idle time (in ticks) before avg queue size becomes 0. 4346 * NOTA: (3/w_q) is approx the value x so that 4347 * (1-w_q)^x < 10^-3. 4348 */ 4349 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 4350 idle = s * 3. / w_q; 4351 p.fs.lookup_step = (int)idle / lookup_depth; 4352 if (!p.fs.lookup_step) 4353 p.fs.lookup_step = 1; 4354 weight = 1 - w_q; 4355 for (t = p.fs.lookup_step; t > 1; --t) 4356 weight *= 1 - w_q; 4357 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 4358 } 4359 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 4360 if (i) 4361 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 4362} 4363 4364static void 4365get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 4366{ 4367 int i, l; 4368 char *ap, *ptr, *optr; 4369 struct ether_addr *mac; 4370 const char *macset = "0123456789abcdefABCDEF:"; 4371 4372 if (strcmp(p, "any") == 0) { 4373 for (i = 0; i < ETHER_ADDR_LEN; i++) 4374 addr[i] = mask[i] = 0; 4375 return; 4376 } 4377 4378 optr = ptr = strdup(p); 4379 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 4380 l = strlen(ap); 4381 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 4382 errx(EX_DATAERR, "Incorrect MAC address"); 4383 bcopy(mac, addr, ETHER_ADDR_LEN); 4384 } else 4385 errx(EX_DATAERR, "Incorrect MAC address"); 4386 4387 if (ptr != NULL) { /* we have mask? */ 4388 if (p[ptr - optr - 1] == '/') { /* mask len */ 4389 l = strtol(ptr, &ap, 10); 4390 if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0) 4391 errx(EX_DATAERR, "Incorrect mask length"); 4392 for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++) 4393 mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l); 4394 } else { /* mask */ 4395 l = strlen(ptr); 4396 if (strspn(ptr, macset) != l || 4397 (mac = ether_aton(ptr)) == NULL) 4398 errx(EX_DATAERR, "Incorrect mask"); 4399 bcopy(mac, mask, ETHER_ADDR_LEN); 4400 } 4401 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 4402 for (i = 0; i < ETHER_ADDR_LEN; i++) 4403 mask[i] = 0xff; 4404 } 4405 for (i = 0; i < ETHER_ADDR_LEN; i++) 4406 addr[i] &= mask[i]; 4407 4408 free(optr); 4409} 4410 4411/* 4412 * helper function, updates the pointer to cmd with the length 4413 * of the current command, and also cleans up the first word of 4414 * the new command in case it has been clobbered before. 4415 */ 4416static ipfw_insn * 4417next_cmd(ipfw_insn *cmd) 4418{ 4419 cmd += F_LEN(cmd); 4420 bzero(cmd, sizeof(*cmd)); 4421 return cmd; 4422} 4423 4424/* 4425 * Takes arguments and copies them into a comment 4426 */ 4427static void 4428fill_comment(ipfw_insn *cmd, int ac, char **av) 4429{ 4430 int i, l; 4431 char *p = (char *)(cmd + 1); 4432 4433 cmd->opcode = O_NOP; 4434 cmd->len = (cmd->len & (F_NOT | F_OR)); 4435 4436 /* Compute length of comment string. */ 4437 for (i = 0, l = 0; i < ac; i++) 4438 l += strlen(av[i]) + 1; 4439 if (l == 0) 4440 return; 4441 if (l > 84) 4442 errx(EX_DATAERR, 4443 "comment too long (max 80 chars)"); 4444 l = 1 + (l+3)/4; 4445 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 4446 for (i = 0; i < ac; i++) { 4447 strcpy(p, av[i]); 4448 p += strlen(av[i]); 4449 *p++ = ' '; 4450 } 4451 *(--p) = '\0'; 4452} 4453 4454/* 4455 * A function to fill simple commands of size 1. 4456 * Existing flags are preserved. 4457 */ 4458static void 4459fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 4460{ 4461 cmd->opcode = opcode; 4462 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 4463 cmd->arg1 = arg; 4464} 4465 4466/* 4467 * Fetch and add the MAC address and type, with masks. This generates one or 4468 * two microinstructions, and returns the pointer to the last one. 4469 */ 4470static ipfw_insn * 4471add_mac(ipfw_insn *cmd, int ac, char *av[]) 4472{ 4473 ipfw_insn_mac *mac; 4474 4475 if (ac < 2) 4476 errx(EX_DATAERR, "MAC dst src"); 4477 4478 cmd->opcode = O_MACADDR2; 4479 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 4480 4481 mac = (ipfw_insn_mac *)cmd; 4482 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 4483 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 4484 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 4485 return cmd; 4486} 4487 4488static ipfw_insn * 4489add_mactype(ipfw_insn *cmd, int ac, char *av) 4490{ 4491 if (ac < 1) 4492 errx(EX_DATAERR, "missing MAC type"); 4493 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 4494 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 4495 cmd->opcode = O_MAC_TYPE; 4496 return cmd; 4497 } else 4498 return NULL; 4499} 4500 4501static ipfw_insn * 4502add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 4503{ 4504 struct protoent *pe; 4505 char *ep; 4506 int proto; 4507 4508 proto = strtol(av, &ep, 10); 4509 if (*ep != '\0' || proto <= 0) { 4510 if ((pe = getprotobyname(av)) == NULL) 4511 return NULL; 4512 proto = pe->p_proto; 4513 } 4514 4515 fill_cmd(cmd, O_PROTO, 0, proto); 4516 *protop = proto; 4517 return cmd; 4518} 4519 4520static ipfw_insn * 4521add_proto(ipfw_insn *cmd, char *av, u_char *protop) 4522{ 4523 u_char proto = IPPROTO_IP; 4524 4525 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4526 ; /* do not set O_IP4 nor O_IP6 */ 4527 else if (strcmp(av, "ip4") == 0) 4528 /* explicit "just IPv4" rule */ 4529 fill_cmd(cmd, O_IP4, 0, 0); 4530 else if (strcmp(av, "ip6") == 0) { 4531 /* explicit "just IPv6" rule */ 4532 proto = IPPROTO_IPV6; 4533 fill_cmd(cmd, O_IP6, 0, 0); 4534 } else 4535 return add_proto0(cmd, av, protop); 4536 4537 *protop = proto; 4538 return cmd; 4539} 4540 4541static ipfw_insn * 4542add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 4543{ 4544 u_char proto = IPPROTO_IP; 4545 4546 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 4547 ; /* do not set O_IP4 nor O_IP6 */ 4548 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 4549 /* explicit "just IPv4" rule */ 4550 fill_cmd(cmd, O_IP4, 0, 0); 4551 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 4552 /* explicit "just IPv6" rule */ 4553 proto = IPPROTO_IPV6; 4554 fill_cmd(cmd, O_IP6, 0, 0); 4555 } else 4556 return add_proto0(cmd, av, protop); 4557 4558 *protop = proto; 4559 return cmd; 4560} 4561 4562static ipfw_insn * 4563add_srcip(ipfw_insn *cmd, char *av) 4564{ 4565 fill_ip((ipfw_insn_ip *)cmd, av); 4566 if (cmd->opcode == O_IP_DST_SET) /* set */ 4567 cmd->opcode = O_IP_SRC_SET; 4568 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4569 cmd->opcode = O_IP_SRC_LOOKUP; 4570 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4571 cmd->opcode = O_IP_SRC_ME; 4572 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4573 cmd->opcode = O_IP_SRC; 4574 else /* addr/mask */ 4575 cmd->opcode = O_IP_SRC_MASK; 4576 return cmd; 4577} 4578 4579static ipfw_insn * 4580add_dstip(ipfw_insn *cmd, char *av) 4581{ 4582 fill_ip((ipfw_insn_ip *)cmd, av); 4583 if (cmd->opcode == O_IP_DST_SET) /* set */ 4584 ; 4585 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 4586 ; 4587 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 4588 cmd->opcode = O_IP_DST_ME; 4589 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 4590 cmd->opcode = O_IP_DST; 4591 else /* addr/mask */ 4592 cmd->opcode = O_IP_DST_MASK; 4593 return cmd; 4594} 4595 4596static ipfw_insn * 4597add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 4598{ 4599 if (_substrcmp(av, "any") == 0) { 4600 return NULL; 4601 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 4602 /* XXX todo: check that we have a protocol with ports */ 4603 cmd->opcode = opcode; 4604 return cmd; 4605 } 4606 return NULL; 4607} 4608 4609static ipfw_insn * 4610add_src(ipfw_insn *cmd, char *av, u_char proto) 4611{ 4612 struct in6_addr a; 4613 char *host, *ch; 4614 ipfw_insn *ret = NULL; 4615 4616 if ((host = strdup(av)) == NULL) 4617 return NULL; 4618 if ((ch = strrchr(host, '/')) != NULL) 4619 *ch = '\0'; 4620 4621 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4622 inet_pton(AF_INET6, host, &a)) 4623 ret = add_srcip6(cmd, av); 4624 /* XXX: should check for IPv4, not !IPv6 */ 4625 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4626 !inet_pton(AF_INET6, host, &a))) 4627 ret = add_srcip(cmd, av); 4628 if (ret == NULL && strcmp(av, "any") != 0) 4629 ret = cmd; 4630 4631 free(host); 4632 return ret; 4633} 4634 4635static ipfw_insn * 4636add_dst(ipfw_insn *cmd, char *av, u_char proto) 4637{ 4638 struct in6_addr a; 4639 char *host, *ch; 4640 ipfw_insn *ret = NULL; 4641 4642 if ((host = strdup(av)) == NULL) 4643 return NULL; 4644 if ((ch = strrchr(host, '/')) != NULL) 4645 *ch = '\0'; 4646 4647 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 4648 inet_pton(AF_INET6, host, &a)) 4649 ret = add_dstip6(cmd, av); 4650 /* XXX: should check for IPv4, not !IPv6 */ 4651 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 4652 !inet_pton(AF_INET6, host, &a))) 4653 ret = add_dstip(cmd, av); 4654 if (ret == NULL && strcmp(av, "any") != 0) 4655 ret = cmd; 4656 4657 free(host); 4658 return ret; 4659} 4660 4661/* 4662 * Parse arguments and assemble the microinstructions which make up a rule. 4663 * Rules are added into the 'rulebuf' and then copied in the correct order 4664 * into the actual rule. 4665 * 4666 * The syntax for a rule starts with the action, followed by 4667 * optional action parameters, and the various match patterns. 4668 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 4669 * (generated if the rule includes a keep-state option), then the 4670 * various match patterns, log/altq actions, and the actual action. 4671 * 4672 */ 4673void 4674ipfw_add(int ac, char *av[]) 4675{ 4676 /* 4677 * rules are added into the 'rulebuf' and then copied in 4678 * the correct order into the actual rule. 4679 * Some things that need to go out of order (prob, action etc.) 4680 * go into actbuf[]. 4681 */ 4682 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 4683 4684 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 4685 ipfw_insn *first_cmd; /* first match pattern */ 4686 4687 struct ip_fw *rule; 4688 4689 /* 4690 * various flags used to record that we entered some fields. 4691 */ 4692 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 4693 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 4694 size_t len; 4695 4696 int i; 4697 4698 int open_par = 0; /* open parenthesis ( */ 4699 4700 /* proto is here because it is used to fetch ports */ 4701 u_char proto = IPPROTO_IP; /* default protocol */ 4702 4703 double match_prob = 1; /* match probability, default is always match */ 4704 4705 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 4706 bzero(cmdbuf, sizeof(cmdbuf)); 4707 bzero(rulebuf, sizeof(rulebuf)); 4708 4709 rule = (struct ip_fw *)rulebuf; 4710 cmd = (ipfw_insn *)cmdbuf; 4711 action = (ipfw_insn *)actbuf; 4712 4713 av++; ac--; 4714 4715 /* [rule N] -- Rule number optional */ 4716 if (ac && isdigit(**av)) { 4717 rule->rulenum = atoi(*av); 4718 av++; 4719 ac--; 4720 } 4721 4722 /* [set N] -- set number (0..RESVD_SET), optional */ 4723 if (ac > 1 && _substrcmp(*av, "set") == 0) { 4724 int set = strtoul(av[1], NULL, 10); 4725 if (set < 0 || set > RESVD_SET) 4726 errx(EX_DATAERR, "illegal set %s", av[1]); 4727 rule->set = set; 4728 av += 2; ac -= 2; 4729 } 4730 4731 /* [prob D] -- match probability, optional */ 4732 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 4733 match_prob = strtod(av[1], NULL); 4734 4735 if (match_prob <= 0 || match_prob > 1) 4736 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 4737 av += 2; ac -= 2; 4738 } 4739 4740 /* action -- mandatory */ 4741 NEED1("missing action"); 4742 i = match_token(rule_actions, *av); 4743 ac--; av++; 4744 action->len = 1; /* default */ 4745 switch(i) { 4746 case TOK_CHECKSTATE: 4747 have_state = action; 4748 action->opcode = O_CHECK_STATE; 4749 break; 4750 4751 case TOK_ACCEPT: 4752 action->opcode = O_ACCEPT; 4753 break; 4754 4755 case TOK_DENY: 4756 action->opcode = O_DENY; 4757 action->arg1 = 0; 4758 break; 4759 4760 case TOK_REJECT: 4761 action->opcode = O_REJECT; 4762 action->arg1 = ICMP_UNREACH_HOST; 4763 break; 4764 4765 case TOK_RESET: 4766 action->opcode = O_REJECT; 4767 action->arg1 = ICMP_REJECT_RST; 4768 break; 4769 4770 case TOK_RESET6: 4771 action->opcode = O_UNREACH6; 4772 action->arg1 = ICMP6_UNREACH_RST; 4773 break; 4774 4775 case TOK_UNREACH: 4776 action->opcode = O_REJECT; 4777 NEED1("missing reject code"); 4778 fill_reject_code(&action->arg1, *av); 4779 ac--; av++; 4780 break; 4781 4782 case TOK_UNREACH6: 4783 action->opcode = O_UNREACH6; 4784 NEED1("missing unreach code"); 4785 fill_unreach6_code(&action->arg1, *av); 4786 ac--; av++; 4787 break; 4788 4789 case TOK_COUNT: 4790 action->opcode = O_COUNT; 4791 break; 4792 4793 case TOK_NAT: 4794 action->opcode = O_NAT; 4795 action->len = F_INSN_SIZE(ipfw_insn_nat); 4796 goto chkarg; 4797 4798 case TOK_QUEUE: 4799 action->opcode = O_QUEUE; 4800 goto chkarg; 4801 case TOK_PIPE: 4802 action->opcode = O_PIPE; 4803 goto chkarg; 4804 case TOK_SKIPTO: 4805 action->opcode = O_SKIPTO; 4806 goto chkarg; 4807 case TOK_NETGRAPH: 4808 action->opcode = O_NETGRAPH; 4809 goto chkarg; 4810 case TOK_NGTEE: 4811 action->opcode = O_NGTEE; 4812 goto chkarg; 4813 case TOK_DIVERT: 4814 action->opcode = O_DIVERT; 4815 goto chkarg; 4816 case TOK_TEE: 4817 action->opcode = O_TEE; 4818chkarg: 4819 if (!ac) 4820 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 4821 if (isdigit(**av)) { 4822 action->arg1 = strtoul(*av, NULL, 10); 4823 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 4824 errx(EX_DATAERR, "illegal argument for %s", 4825 *(av - 1)); 4826 } else if (_substrcmp(*av, "tablearg") == 0) { 4827 action->arg1 = IP_FW_TABLEARG; 4828 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4829 struct servent *s; 4830 setservent(1); 4831 s = getservbyname(av[0], "divert"); 4832 if (s != NULL) 4833 action->arg1 = ntohs(s->s_port); 4834 else 4835 errx(EX_DATAERR, "illegal divert/tee port"); 4836 } else 4837 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4838 ac--; av++; 4839 break; 4840 4841 case TOK_FORWARD: { 4842 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4843 char *s, *end; 4844 4845 NEED1("missing forward address[:port]"); 4846 4847 action->opcode = O_FORWARD_IP; 4848 action->len = F_INSN_SIZE(ipfw_insn_sa); 4849 4850 p->sa.sin_len = sizeof(struct sockaddr_in); 4851 p->sa.sin_family = AF_INET; 4852 p->sa.sin_port = 0; 4853 /* 4854 * locate the address-port separator (':' or ',') 4855 */ 4856 s = strchr(*av, ':'); 4857 if (s == NULL) 4858 s = strchr(*av, ','); 4859 if (s != NULL) { 4860 *(s++) = '\0'; 4861 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4862 if (s == end) 4863 errx(EX_DATAERR, 4864 "illegal forwarding port ``%s''", s); 4865 p->sa.sin_port = (u_short)i; 4866 } 4867 if (_substrcmp(*av, "tablearg") == 0) 4868 p->sa.sin_addr.s_addr = INADDR_ANY; 4869 else 4870 lookup_host(*av, &(p->sa.sin_addr)); 4871 ac--; av++; 4872 break; 4873 } 4874 case TOK_COMMENT: 4875 /* pretend it is a 'count' rule followed by the comment */ 4876 action->opcode = O_COUNT; 4877 ac++; av--; /* go back... */ 4878 break; 4879 4880 case TOK_SETFIB: 4881 { 4882 int numfibs; 4883 size_t intsize = sizeof(int); 4884 4885 action->opcode = O_SETFIB; 4886 NEED1("missing fib number"); 4887 action->arg1 = strtoul(*av, NULL, 10); 4888 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1) 4889 errx(EX_DATAERR, "fibs not suported.\n"); 4890 if (action->arg1 >= numfibs) /* Temporary */ 4891 errx(EX_DATAERR, "fib too large.\n"); 4892 ac--; av++; 4893 break; 4894 } 4895 4896 default: 4897 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 4898 } 4899 action = next_cmd(action); 4900 4901 /* 4902 * [altq queuename] -- altq tag, optional 4903 * [log [logamount N]] -- log, optional 4904 * 4905 * If they exist, it go first in the cmdbuf, but then it is 4906 * skipped in the copy section to the end of the buffer. 4907 */ 4908 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 4909 ac--; av++; 4910 switch (i) { 4911 case TOK_LOG: 4912 { 4913 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4914 int l; 4915 4916 if (have_log) 4917 errx(EX_DATAERR, 4918 "log cannot be specified more than once"); 4919 have_log = (ipfw_insn *)c; 4920 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4921 cmd->opcode = O_LOG; 4922 if (ac && _substrcmp(*av, "logamount") == 0) { 4923 ac--; av++; 4924 NEED1("logamount requires argument"); 4925 l = atoi(*av); 4926 if (l < 0) 4927 errx(EX_DATAERR, 4928 "logamount must be positive"); 4929 c->max_log = l; 4930 ac--; av++; 4931 } else { 4932 len = sizeof(c->max_log); 4933 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4934 &c->max_log, &len, NULL, 0) == -1) 4935 errx(1, "sysctlbyname(\"%s\")", 4936 "net.inet.ip.fw.verbose_limit"); 4937 } 4938 } 4939 break; 4940 4941 case TOK_ALTQ: 4942 { 4943 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4944 4945 NEED1("missing altq queue name"); 4946 if (have_altq) 4947 errx(EX_DATAERR, 4948 "altq cannot be specified more than once"); 4949 have_altq = (ipfw_insn *)a; 4950 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4951 cmd->opcode = O_ALTQ; 4952 fill_altq_qid(&a->qid, *av); 4953 ac--; av++; 4954 } 4955 break; 4956 4957 case TOK_TAG: 4958 case TOK_UNTAG: { 4959 uint16_t tag; 4960 4961 if (have_tag) 4962 errx(EX_USAGE, "tag and untag cannot be " 4963 "specified more than once"); 4964 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, i, 4965 rule_action_params); 4966 have_tag = cmd; 4967 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4968 ac--; av++; 4969 break; 4970 } 4971 4972 default: 4973 abort(); 4974 } 4975 cmd = next_cmd(cmd); 4976 } 4977 4978 if (have_state) /* must be a check-state, we are done */ 4979 goto done; 4980 4981#define OR_START(target) \ 4982 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 4983 if (open_par) \ 4984 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4985 prev = NULL; \ 4986 open_par = 1; \ 4987 if ( (av[0])[1] == '\0') { \ 4988 ac--; av++; \ 4989 } else \ 4990 (*av)++; \ 4991 } \ 4992 target: \ 4993 4994 4995#define CLOSE_PAR \ 4996 if (open_par) { \ 4997 if (ac && ( \ 4998 strcmp(*av, ")") == 0 || \ 4999 strcmp(*av, "}") == 0)) { \ 5000 prev = NULL; \ 5001 open_par = 0; \ 5002 ac--; av++; \ 5003 } else \ 5004 errx(EX_USAGE, "missing \")\"\n"); \ 5005 } 5006 5007#define NOT_BLOCK \ 5008 if (ac && _substrcmp(*av, "not") == 0) { \ 5009 if (cmd->len & F_NOT) \ 5010 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 5011 cmd->len |= F_NOT; \ 5012 ac--; av++; \ 5013 } 5014 5015#define OR_BLOCK(target) \ 5016 if (ac && _substrcmp(*av, "or") == 0) { \ 5017 if (prev == NULL || open_par == 0) \ 5018 errx(EX_DATAERR, "invalid OR block"); \ 5019 prev->len |= F_OR; \ 5020 ac--; av++; \ 5021 goto target; \ 5022 } \ 5023 CLOSE_PAR; 5024 5025 first_cmd = cmd; 5026 5027#if 0 5028 /* 5029 * MAC addresses, optional. 5030 * If we have this, we skip the part "proto from src to dst" 5031 * and jump straight to the option parsing. 5032 */ 5033 NOT_BLOCK; 5034 NEED1("missing protocol"); 5035 if (_substrcmp(*av, "MAC") == 0 || 5036 _substrcmp(*av, "mac") == 0) { 5037 ac--; av++; /* the "MAC" keyword */ 5038 add_mac(cmd, ac, av); /* exits in case of errors */ 5039 cmd = next_cmd(cmd); 5040 ac -= 2; av += 2; /* dst-mac and src-mac */ 5041 NOT_BLOCK; 5042 NEED1("missing mac type"); 5043 if (add_mactype(cmd, ac, av[0])) 5044 cmd = next_cmd(cmd); 5045 ac--; av++; /* any or mac-type */ 5046 goto read_options; 5047 } 5048#endif 5049 5050 /* 5051 * protocol, mandatory 5052 */ 5053 OR_START(get_proto); 5054 NOT_BLOCK; 5055 NEED1("missing protocol"); 5056 if (add_proto_compat(cmd, *av, &proto)) { 5057 av++; ac--; 5058 if (F_LEN(cmd) != 0) { 5059 prev = cmd; 5060 cmd = next_cmd(cmd); 5061 } 5062 } else if (first_cmd != cmd) { 5063 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 5064 } else 5065 goto read_options; 5066 OR_BLOCK(get_proto); 5067 5068 /* 5069 * "from", mandatory 5070 */ 5071 if (!ac || _substrcmp(*av, "from") != 0) 5072 errx(EX_USAGE, "missing ``from''"); 5073 ac--; av++; 5074 5075 /* 5076 * source IP, mandatory 5077 */ 5078 OR_START(source_ip); 5079 NOT_BLOCK; /* optional "not" */ 5080 NEED1("missing source address"); 5081 if (add_src(cmd, *av, proto)) { 5082 ac--; av++; 5083 if (F_LEN(cmd) != 0) { /* ! any */ 5084 prev = cmd; 5085 cmd = next_cmd(cmd); 5086 } 5087 } else 5088 errx(EX_USAGE, "bad source address %s", *av); 5089 OR_BLOCK(source_ip); 5090 5091 /* 5092 * source ports, optional 5093 */ 5094 NOT_BLOCK; /* optional "not" */ 5095 if (ac) { 5096 if (_substrcmp(*av, "any") == 0 || 5097 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5098 ac--; av++; 5099 if (F_LEN(cmd) != 0) 5100 cmd = next_cmd(cmd); 5101 } 5102 } 5103 5104 /* 5105 * "to", mandatory 5106 */ 5107 if (!ac || _substrcmp(*av, "to") != 0) 5108 errx(EX_USAGE, "missing ``to''"); 5109 av++; ac--; 5110 5111 /* 5112 * destination, mandatory 5113 */ 5114 OR_START(dest_ip); 5115 NOT_BLOCK; /* optional "not" */ 5116 NEED1("missing dst address"); 5117 if (add_dst(cmd, *av, proto)) { 5118 ac--; av++; 5119 if (F_LEN(cmd) != 0) { /* ! any */ 5120 prev = cmd; 5121 cmd = next_cmd(cmd); 5122 } 5123 } else 5124 errx( EX_USAGE, "bad destination address %s", *av); 5125 OR_BLOCK(dest_ip); 5126 5127 /* 5128 * dest. ports, optional 5129 */ 5130 NOT_BLOCK; /* optional "not" */ 5131 if (ac) { 5132 if (_substrcmp(*av, "any") == 0 || 5133 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5134 ac--; av++; 5135 if (F_LEN(cmd) != 0) 5136 cmd = next_cmd(cmd); 5137 } 5138 } 5139 5140read_options: 5141 if (ac && first_cmd == cmd) { 5142 /* 5143 * nothing specified so far, store in the rule to ease 5144 * printout later. 5145 */ 5146 rule->_pad = 1; 5147 } 5148 prev = NULL; 5149 while (ac) { 5150 char *s; 5151 ipfw_insn_u32 *cmd32; /* alias for cmd */ 5152 5153 s = *av; 5154 cmd32 = (ipfw_insn_u32 *)cmd; 5155 5156 if (*s == '!') { /* alternate syntax for NOT */ 5157 if (cmd->len & F_NOT) 5158 errx(EX_USAGE, "double \"not\" not allowed\n"); 5159 cmd->len = F_NOT; 5160 s++; 5161 } 5162 i = match_token(rule_options, s); 5163 ac--; av++; 5164 switch(i) { 5165 case TOK_NOT: 5166 if (cmd->len & F_NOT) 5167 errx(EX_USAGE, "double \"not\" not allowed\n"); 5168 cmd->len = F_NOT; 5169 break; 5170 5171 case TOK_OR: 5172 if (open_par == 0 || prev == NULL) 5173 errx(EX_USAGE, "invalid \"or\" block\n"); 5174 prev->len |= F_OR; 5175 break; 5176 5177 case TOK_STARTBRACE: 5178 if (open_par) 5179 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 5180 open_par = 1; 5181 break; 5182 5183 case TOK_ENDBRACE: 5184 if (!open_par) 5185 errx(EX_USAGE, "+missing \")\"\n"); 5186 open_par = 0; 5187 prev = NULL; 5188 break; 5189 5190 case TOK_IN: 5191 fill_cmd(cmd, O_IN, 0, 0); 5192 break; 5193 5194 case TOK_OUT: 5195 cmd->len ^= F_NOT; /* toggle F_NOT */ 5196 fill_cmd(cmd, O_IN, 0, 0); 5197 break; 5198 5199 case TOK_DIVERTED: 5200 fill_cmd(cmd, O_DIVERTED, 0, 3); 5201 break; 5202 5203 case TOK_DIVERTEDLOOPBACK: 5204 fill_cmd(cmd, O_DIVERTED, 0, 1); 5205 break; 5206 5207 case TOK_DIVERTEDOUTPUT: 5208 fill_cmd(cmd, O_DIVERTED, 0, 2); 5209 break; 5210 5211 case TOK_FRAG: 5212 fill_cmd(cmd, O_FRAG, 0, 0); 5213 break; 5214 5215 case TOK_LAYER2: 5216 fill_cmd(cmd, O_LAYER2, 0, 0); 5217 break; 5218 5219 case TOK_XMIT: 5220 case TOK_RECV: 5221 case TOK_VIA: 5222 NEED1("recv, xmit, via require interface name" 5223 " or address"); 5224 fill_iface((ipfw_insn_if *)cmd, av[0]); 5225 ac--; av++; 5226 if (F_LEN(cmd) == 0) /* not a valid address */ 5227 break; 5228 if (i == TOK_XMIT) 5229 cmd->opcode = O_XMIT; 5230 else if (i == TOK_RECV) 5231 cmd->opcode = O_RECV; 5232 else if (i == TOK_VIA) 5233 cmd->opcode = O_VIA; 5234 break; 5235 5236 case TOK_ICMPTYPES: 5237 NEED1("icmptypes requires list of types"); 5238 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 5239 av++; ac--; 5240 break; 5241 5242 case TOK_ICMP6TYPES: 5243 NEED1("icmptypes requires list of types"); 5244 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 5245 av++; ac--; 5246 break; 5247 5248 case TOK_IPTTL: 5249 NEED1("ipttl requires TTL"); 5250 if (strpbrk(*av, "-,")) { 5251 if (!add_ports(cmd, *av, 0, O_IPTTL)) 5252 errx(EX_DATAERR, "invalid ipttl %s", *av); 5253 } else 5254 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 5255 ac--; av++; 5256 break; 5257 5258 case TOK_IPID: 5259 NEED1("ipid requires id"); 5260 if (strpbrk(*av, "-,")) { 5261 if (!add_ports(cmd, *av, 0, O_IPID)) 5262 errx(EX_DATAERR, "invalid ipid %s", *av); 5263 } else 5264 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 5265 ac--; av++; 5266 break; 5267 5268 case TOK_IPLEN: 5269 NEED1("iplen requires length"); 5270 if (strpbrk(*av, "-,")) { 5271 if (!add_ports(cmd, *av, 0, O_IPLEN)) 5272 errx(EX_DATAERR, "invalid ip len %s", *av); 5273 } else 5274 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 5275 ac--; av++; 5276 break; 5277 5278 case TOK_IPVER: 5279 NEED1("ipver requires version"); 5280 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 5281 ac--; av++; 5282 break; 5283 5284 case TOK_IPPRECEDENCE: 5285 NEED1("ipprecedence requires value"); 5286 fill_cmd(cmd, O_IPPRECEDENCE, 0, 5287 (strtoul(*av, NULL, 0) & 7) << 5); 5288 ac--; av++; 5289 break; 5290 5291 case TOK_IPOPTS: 5292 NEED1("missing argument for ipoptions"); 5293 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 5294 ac--; av++; 5295 break; 5296 5297 case TOK_IPTOS: 5298 NEED1("missing argument for iptos"); 5299 fill_flags(cmd, O_IPTOS, f_iptos, *av); 5300 ac--; av++; 5301 break; 5302 5303 case TOK_UID: 5304 NEED1("uid requires argument"); 5305 { 5306 char *end; 5307 uid_t uid; 5308 struct passwd *pwd; 5309 5310 cmd->opcode = O_UID; 5311 uid = strtoul(*av, &end, 0); 5312 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 5313 if (pwd == NULL) 5314 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 5315 cmd32->d[0] = pwd->pw_uid; 5316 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5317 ac--; av++; 5318 } 5319 break; 5320 5321 case TOK_GID: 5322 NEED1("gid requires argument"); 5323 { 5324 char *end; 5325 gid_t gid; 5326 struct group *grp; 5327 5328 cmd->opcode = O_GID; 5329 gid = strtoul(*av, &end, 0); 5330 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 5331 if (grp == NULL) 5332 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 5333 cmd32->d[0] = grp->gr_gid; 5334 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5335 ac--; av++; 5336 } 5337 break; 5338 5339 case TOK_JAIL: 5340 NEED1("jail requires argument"); 5341 { 5342 char *end; 5343 int jid; 5344 5345 cmd->opcode = O_JAIL; 5346 jid = (int)strtol(*av, &end, 0); 5347 if (jid < 0 || *end != '\0') 5348 errx(EX_DATAERR, "jail requires prison ID"); 5349 cmd32->d[0] = (uint32_t)jid; 5350 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 5351 ac--; av++; 5352 } 5353 break; 5354 5355 case TOK_ESTAB: 5356 fill_cmd(cmd, O_ESTAB, 0, 0); 5357 break; 5358 5359 case TOK_SETUP: 5360 fill_cmd(cmd, O_TCPFLAGS, 0, 5361 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 5362 break; 5363 5364 case TOK_TCPDATALEN: 5365 NEED1("tcpdatalen requires length"); 5366 if (strpbrk(*av, "-,")) { 5367 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 5368 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 5369 } else 5370 fill_cmd(cmd, O_TCPDATALEN, 0, 5371 strtoul(*av, NULL, 0)); 5372 ac--; av++; 5373 break; 5374 5375 case TOK_TCPOPTS: 5376 NEED1("missing argument for tcpoptions"); 5377 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 5378 ac--; av++; 5379 break; 5380 5381 case TOK_TCPSEQ: 5382 case TOK_TCPACK: 5383 NEED1("tcpseq/tcpack requires argument"); 5384 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 5385 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 5386 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 5387 ac--; av++; 5388 break; 5389 5390 case TOK_TCPWIN: 5391 NEED1("tcpwin requires length"); 5392 fill_cmd(cmd, O_TCPWIN, 0, 5393 htons(strtoul(*av, NULL, 0))); 5394 ac--; av++; 5395 break; 5396 5397 case TOK_TCPFLAGS: 5398 NEED1("missing argument for tcpflags"); 5399 cmd->opcode = O_TCPFLAGS; 5400 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 5401 ac--; av++; 5402 break; 5403 5404 case TOK_KEEPSTATE: 5405 if (open_par) 5406 errx(EX_USAGE, "keep-state cannot be part " 5407 "of an or block"); 5408 if (have_state) 5409 errx(EX_USAGE, "only one of keep-state " 5410 "and limit is allowed"); 5411 have_state = cmd; 5412 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 5413 break; 5414 5415 case TOK_LIMIT: { 5416 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 5417 int val; 5418 5419 if (open_par) 5420 errx(EX_USAGE, 5421 "limit cannot be part of an or block"); 5422 if (have_state) 5423 errx(EX_USAGE, "only one of keep-state and " 5424 "limit is allowed"); 5425 have_state = cmd; 5426 5427 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 5428 cmd->opcode = O_LIMIT; 5429 c->limit_mask = c->conn_limit = 0; 5430 5431 while (ac > 0) { 5432 if ((val = match_token(limit_masks, *av)) <= 0) 5433 break; 5434 c->limit_mask |= val; 5435 ac--; av++; 5436 } 5437 5438 if (c->limit_mask == 0) 5439 errx(EX_USAGE, "limit: missing limit mask"); 5440 5441 GET_UINT_ARG(c->conn_limit, 1, IPFW_DEFAULT_RULE - 1, 5442 TOK_LIMIT, rule_options); 5443 5444 ac--; av++; 5445 break; 5446 } 5447 5448 case TOK_PROTO: 5449 NEED1("missing protocol"); 5450 if (add_proto(cmd, *av, &proto)) { 5451 ac--; av++; 5452 } else 5453 errx(EX_DATAERR, "invalid protocol ``%s''", 5454 *av); 5455 break; 5456 5457 case TOK_SRCIP: 5458 NEED1("missing source IP"); 5459 if (add_srcip(cmd, *av)) { 5460 ac--; av++; 5461 } 5462 break; 5463 5464 case TOK_DSTIP: 5465 NEED1("missing destination IP"); 5466 if (add_dstip(cmd, *av)) { 5467 ac--; av++; 5468 } 5469 break; 5470 5471 case TOK_SRCIP6: 5472 NEED1("missing source IP6"); 5473 if (add_srcip6(cmd, *av)) { 5474 ac--; av++; 5475 } 5476 break; 5477 5478 case TOK_DSTIP6: 5479 NEED1("missing destination IP6"); 5480 if (add_dstip6(cmd, *av)) { 5481 ac--; av++; 5482 } 5483 break; 5484 5485 case TOK_SRCPORT: 5486 NEED1("missing source port"); 5487 if (_substrcmp(*av, "any") == 0 || 5488 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 5489 ac--; av++; 5490 } else 5491 errx(EX_DATAERR, "invalid source port %s", *av); 5492 break; 5493 5494 case TOK_DSTPORT: 5495 NEED1("missing destination port"); 5496 if (_substrcmp(*av, "any") == 0 || 5497 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 5498 ac--; av++; 5499 } else 5500 errx(EX_DATAERR, "invalid destination port %s", 5501 *av); 5502 break; 5503 5504 case TOK_MAC: 5505 if (add_mac(cmd, ac, av)) { 5506 ac -= 2; av += 2; 5507 } 5508 break; 5509 5510 case TOK_MACTYPE: 5511 NEED1("missing mac type"); 5512 if (!add_mactype(cmd, ac, *av)) 5513 errx(EX_DATAERR, "invalid mac type %s", *av); 5514 ac--; av++; 5515 break; 5516 5517 case TOK_VERREVPATH: 5518 fill_cmd(cmd, O_VERREVPATH, 0, 0); 5519 break; 5520 5521 case TOK_VERSRCREACH: 5522 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 5523 break; 5524 5525 case TOK_ANTISPOOF: 5526 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 5527 break; 5528 5529 case TOK_IPSEC: 5530 fill_cmd(cmd, O_IPSEC, 0, 0); 5531 break; 5532 5533 case TOK_IPV6: 5534 fill_cmd(cmd, O_IP6, 0, 0); 5535 break; 5536 5537 case TOK_IPV4: 5538 fill_cmd(cmd, O_IP4, 0, 0); 5539 break; 5540 5541 case TOK_EXT6HDR: 5542 fill_ext6hdr( cmd, *av ); 5543 ac--; av++; 5544 break; 5545 5546 case TOK_FLOWID: 5547 if (proto != IPPROTO_IPV6 ) 5548 errx( EX_USAGE, "flow-id filter is active " 5549 "only for ipv6 protocol\n"); 5550 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 5551 ac--; av++; 5552 break; 5553 5554 case TOK_COMMENT: 5555 fill_comment(cmd, ac, av); 5556 av += ac; 5557 ac = 0; 5558 break; 5559 5560 case TOK_TAGGED: 5561 if (ac > 0 && strpbrk(*av, "-,")) { 5562 if (!add_ports(cmd, *av, 0, O_TAGGED)) 5563 errx(EX_DATAERR, "tagged: invalid tag" 5564 " list: %s", *av); 5565 } 5566 else { 5567 uint16_t tag; 5568 5569 GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, 5570 TOK_TAGGED, rule_options); 5571 fill_cmd(cmd, O_TAGGED, 0, tag); 5572 } 5573 ac--; av++; 5574 break; 5575 5576 case TOK_FIB: 5577 NEED1("fib requires fib number"); 5578 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 5579 ac--; av++; 5580 break; 5581 5582 default: 5583 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 5584 } 5585 if (F_LEN(cmd) > 0) { /* prepare to advance */ 5586 prev = cmd; 5587 cmd = next_cmd(cmd); 5588 } 5589 } 5590 5591done: 5592 /* 5593 * Now copy stuff into the rule. 5594 * If we have a keep-state option, the first instruction 5595 * must be a PROBE_STATE (which is generated here). 5596 * If we have a LOG option, it was stored as the first command, 5597 * and now must be moved to the top of the action part. 5598 */ 5599 dst = (ipfw_insn *)rule->cmd; 5600 5601 /* 5602 * First thing to write into the command stream is the match probability. 5603 */ 5604 if (match_prob != 1) { /* 1 means always match */ 5605 dst->opcode = O_PROB; 5606 dst->len = 2; 5607 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 5608 dst += dst->len; 5609 } 5610 5611 /* 5612 * generate O_PROBE_STATE if necessary 5613 */ 5614 if (have_state && have_state->opcode != O_CHECK_STATE) { 5615 fill_cmd(dst, O_PROBE_STATE, 0, 0); 5616 dst = next_cmd(dst); 5617 } 5618 5619 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 5620 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 5621 i = F_LEN(src); 5622 5623 switch (src->opcode) { 5624 case O_LOG: 5625 case O_KEEP_STATE: 5626 case O_LIMIT: 5627 case O_ALTQ: 5628 case O_TAG: 5629 break; 5630 default: 5631 bcopy(src, dst, i * sizeof(uint32_t)); 5632 dst += i; 5633 } 5634 } 5635 5636 /* 5637 * put back the have_state command as last opcode 5638 */ 5639 if (have_state && have_state->opcode != O_CHECK_STATE) { 5640 i = F_LEN(have_state); 5641 bcopy(have_state, dst, i * sizeof(uint32_t)); 5642 dst += i; 5643 } 5644 /* 5645 * start action section 5646 */ 5647 rule->act_ofs = dst - rule->cmd; 5648 5649 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 5650 if (have_log) { 5651 i = F_LEN(have_log); 5652 bcopy(have_log, dst, i * sizeof(uint32_t)); 5653 dst += i; 5654 } 5655 if (have_altq) { 5656 i = F_LEN(have_altq); 5657 bcopy(have_altq, dst, i * sizeof(uint32_t)); 5658 dst += i; 5659 } 5660 if (have_tag) { 5661 i = F_LEN(have_tag); 5662 bcopy(have_tag, dst, i * sizeof(uint32_t)); 5663 dst += i; 5664 } 5665 /* 5666 * copy all other actions 5667 */ 5668 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 5669 i = F_LEN(src); 5670 bcopy(src, dst, i * sizeof(uint32_t)); 5671 dst += i; 5672 } 5673 5674 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 5675 i = (char *)dst - (char *)rule; 5676 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 5677 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 5678 if (!co.do_quiet) 5679 show_ipfw(rule, 0, 0); 5680} 5681 5682/* 5683 * clear the counters or the log counters. 5684 */ 5685void 5686ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */) 5687{ 5688 uint32_t arg, saved_arg; 5689 int failed = EX_OK; 5690 char const *errstr; 5691 char const *name = optname ? "RESETLOG" : "ZERO"; 5692 5693 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO; 5694 5695 av++; ac--; 5696 5697 if (!ac) { 5698 /* clear all entries */ 5699 if (do_cmd(optname, NULL, 0) < 0) 5700 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 5701 if (!co.do_quiet) 5702 printf("%s.\n", optname == IP_FW_ZERO ? 5703 "Accounting cleared":"Logging counts reset"); 5704 5705 return; 5706 } 5707 5708 while (ac) { 5709 /* Rule number */ 5710 if (isdigit(**av)) { 5711 arg = strtonum(*av, 0, 0xffff, &errstr); 5712 if (errstr) 5713 errx(EX_DATAERR, 5714 "invalid rule number %s\n", *av); 5715 saved_arg = arg; 5716 if (co.use_set) 5717 arg |= (1 << 24) | ((co.use_set - 1) << 16); 5718 av++; 5719 ac--; 5720 if (do_cmd(optname, &arg, sizeof(arg))) { 5721 warn("rule %u: setsockopt(IP_FW_%s)", 5722 saved_arg, name); 5723 failed = EX_UNAVAILABLE; 5724 } else if (!co.do_quiet) 5725 printf("Entry %d %s.\n", saved_arg, 5726 optname == IP_FW_ZERO ? 5727 "cleared" : "logging count reset"); 5728 } else { 5729 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5730 } 5731 } 5732 if (failed != EX_OK) 5733 exit(failed); 5734} 5735 5736void 5737ipfw_flush(int force) 5738{ 5739 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 5740 5741 if (!force && !co.do_quiet) { /* need to ask user */ 5742 int c; 5743 5744 printf("Are you sure? [yn] "); 5745 fflush(stdout); 5746 do { 5747 c = toupper(getc(stdin)); 5748 while (c != '\n' && getc(stdin) != '\n') 5749 if (feof(stdin)) 5750 return; /* and do not flush */ 5751 } while (c != 'Y' && c != 'N'); 5752 printf("\n"); 5753 if (c == 'N') /* user said no */ 5754 return; 5755 } 5756 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5757 if (co.use_set) { 5758 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24); 5759 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0) 5760 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)"); 5761 } else if (do_cmd(cmd, NULL, 0) < 0) 5762 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 5763 co.do_pipe ? "DUMMYNET" : "FW"); 5764 if (!co.do_quiet) 5765 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5766} 5767 5768 5769static void table_list(ipfw_table_entry ent, int need_header); 5770 5771/* 5772 * This one handles all table-related commands 5773 * ipfw table N add addr[/masklen] [value] 5774 * ipfw table N delete addr[/masklen] 5775 * ipfw table {N | all} flush 5776 * ipfw table {N | all} list 5777 */ 5778void 5779ipfw_table_handler(int ac, char *av[]) 5780{ 5781 ipfw_table_entry ent; 5782 int do_add; 5783 int is_all; 5784 size_t len; 5785 char *p; 5786 uint32_t a; 5787 uint32_t tables_max; 5788 5789 len = sizeof(tables_max); 5790 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len, 5791 NULL, 0) == -1) { 5792#ifdef IPFW_TABLES_MAX 5793 warn("Warn: Failed to get the max tables number via sysctl. " 5794 "Using the compiled in defaults. \nThe reason was"); 5795 tables_max = IPFW_TABLES_MAX; 5796#else 5797 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")"); 5798#endif 5799 } 5800 5801 ac--; av++; 5802 if (ac && isdigit(**av)) { 5803 ent.tbl = atoi(*av); 5804 is_all = 0; 5805 ac--; av++; 5806 } else if (ac && _substrcmp(*av, "all") == 0) { 5807 ent.tbl = 0; 5808 is_all = 1; 5809 ac--; av++; 5810 } else 5811 errx(EX_USAGE, "table number or 'all' keyword required"); 5812 if (ent.tbl >= tables_max) 5813 errx(EX_USAGE, "The table number exceeds the maximum allowed " 5814 "value (%d)", tables_max - 1); 5815 NEED1("table needs command"); 5816 if (is_all && _substrcmp(*av, "list") != 0 5817 && _substrcmp(*av, "flush") != 0) 5818 errx(EX_USAGE, "table number required"); 5819 5820 if (_substrcmp(*av, "add") == 0 || 5821 _substrcmp(*av, "delete") == 0) { 5822 do_add = **av == 'a'; 5823 ac--; av++; 5824 if (!ac) 5825 errx(EX_USAGE, "IP address required"); 5826 p = strchr(*av, '/'); 5827 if (p) { 5828 *p++ = '\0'; 5829 ent.masklen = atoi(p); 5830 if (ent.masklen > 32) 5831 errx(EX_DATAERR, "bad width ``%s''", p); 5832 } else 5833 ent.masklen = 32; 5834 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 5835 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5836 ac--; av++; 5837 if (do_add && ac) { 5838 unsigned int tval; 5839 /* isdigit is a bit of a hack here.. */ 5840 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 5841 ent.value = strtoul(*av, NULL, 0); 5842 } else { 5843 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 5844 /* The value must be stored in host order * 5845 * so that the values < 65k can be distinguished */ 5846 ent.value = ntohl(tval); 5847 } else { 5848 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 5849 } 5850 } 5851 } else 5852 ent.value = 0; 5853 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 5854 &ent, sizeof(ent)) < 0) { 5855 /* If running silent, don't bomb out on these errors. */ 5856 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 5857 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 5858 do_add ? "ADD" : "DEL"); 5859 /* In silent mode, react to a failed add by deleting */ 5860 if (do_add) { 5861 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 5862 if (do_cmd(IP_FW_TABLE_ADD, 5863 &ent, sizeof(ent)) < 0) 5864 err(EX_OSERR, 5865 "setsockopt(IP_FW_TABLE_ADD)"); 5866 } 5867 } 5868 } else if (_substrcmp(*av, "flush") == 0) { 5869 a = is_all ? tables_max : (ent.tbl + 1); 5870 do { 5871 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, 5872 sizeof(ent.tbl)) < 0) 5873 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 5874 } while (++ent.tbl < a); 5875 } else if (_substrcmp(*av, "list") == 0) { 5876 a = is_all ? tables_max : (ent.tbl + 1); 5877 do { 5878 table_list(ent, is_all); 5879 } while (++ent.tbl < a); 5880 } else 5881 errx(EX_USAGE, "invalid table command %s", *av); 5882} 5883 5884static void 5885table_list(ipfw_table_entry ent, int need_header) 5886{ 5887 ipfw_table *tbl; 5888 socklen_t l; 5889 uint32_t a; 5890 5891 a = ent.tbl; 5892 l = sizeof(a); 5893 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 5894 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 5895 5896 /* If a is zero we have nothing to do, the table is empty. */ 5897 if (a == 0) 5898 return; 5899 5900 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 5901 tbl = safe_calloc(1, l); 5902 tbl->tbl = ent.tbl; 5903 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 5904 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 5905 if (tbl->cnt && need_header) 5906 printf("---table(%d)---\n", tbl->tbl); 5907 for (a = 0; a < tbl->cnt; a++) { 5908 unsigned int tval; 5909 tval = tbl->ent[a].value; 5910 if (co.do_value_as_ip) { 5911 char tbuf[128]; 5912 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 5913 &tbl->ent[a].addr), 127); 5914 /* inet_ntoa expects network order */ 5915 tval = htonl(tval); 5916 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 5917 inet_ntoa(*(struct in_addr *)&tval)); 5918 } else { 5919 printf("%s/%u %u\n", 5920 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 5921 tbl->ent[a].masklen, tval); 5922 } 5923 } 5924 free(tbl); 5925} 5926 5927void 5928ipfw_show_nat(int ac, char **av) 5929{ 5930 struct cfg_nat *n; 5931 struct cfg_redir *e; 5932 int cmd, i, nbytes, do_cfg, do_rule, frule, lrule, nalloc, size; 5933 int nat_cnt, redir_cnt, r; 5934 uint8_t *data, *p; 5935 char *endptr; 5936 5937 do_rule = 0; 5938 nalloc = 1024; 5939 size = 0; 5940 data = NULL; 5941 frule = 0; 5942 lrule = IPFW_DEFAULT_RULE; /* max ipfw rule number */ 5943 ac--; av++; 5944 5945 if (co.test_only) 5946 return; 5947 5948 /* Parse parameters. */ 5949 for (cmd = IP_FW_NAT_GET_LOG, do_cfg = 0; ac != 0; ac--, av++) { 5950 if (!strncmp(av[0], "config", strlen(av[0]))) { 5951 cmd = IP_FW_NAT_GET_CONFIG, do_cfg = 1; 5952 continue; 5953 } 5954 /* Convert command line rule #. */ 5955 frule = lrule = strtoul(av[0], &endptr, 10); 5956 if (*endptr == '-') 5957 lrule = strtoul(endptr+1, &endptr, 10); 5958 if (lrule == 0) 5959 err(EX_USAGE, "invalid rule number: %s", av[0]); 5960 do_rule = 1; 5961 } 5962 5963 nbytes = nalloc; 5964 while (nbytes >= nalloc) { 5965 nalloc = nalloc * 2; 5966 nbytes = nalloc; 5967 data = safe_realloc(data, nbytes); 5968 if (do_cmd(cmd, data, (uintptr_t)&nbytes) < 0) 5969 err(EX_OSERR, "getsockopt(IP_FW_GET_%s)", 5970 (cmd == IP_FW_NAT_GET_LOG) ? "LOG" : "CONFIG"); 5971 } 5972 if (nbytes == 0) 5973 exit(0); 5974 if (do_cfg) { 5975 nat_cnt = *((int *)data); 5976 for (i = sizeof(nat_cnt); nat_cnt; nat_cnt--) { 5977 n = (struct cfg_nat *)&data[i]; 5978 if (frule <= n->id && lrule >= n->id) 5979 print_nat_config(&data[i]); 5980 i += sizeof(struct cfg_nat); 5981 for (redir_cnt = 0; redir_cnt < n->redir_cnt; redir_cnt++) { 5982 e = (struct cfg_redir *)&data[i]; 5983 i += sizeof(struct cfg_redir) + e->spool_cnt * 5984 sizeof(struct cfg_spool); 5985 } 5986 } 5987 } else { 5988 for (i = 0; 1; i += LIBALIAS_BUF_SIZE + sizeof(int)) { 5989 p = &data[i]; 5990 if (p == data + nbytes) 5991 break; 5992 bcopy(p, &r, sizeof(int)); 5993 if (do_rule) { 5994 if (!(frule <= r && lrule >= r)) 5995 continue; 5996 } 5997 printf("nat %u: %s\n", r, p+sizeof(int)); 5998 } 5999 } 6000} 6001