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 * $FreeBSD$ 21 */ 22 23 #include <sys/param.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 #include <sys/time.h> 29 #include <sys/wait.h> 30 #include <sys/queue.h> 31 32 #include <ctype.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <grp.h> 36 #include <limits.h> 37 #include <netdb.h> 38 #include <pwd.h> 39 #include <signal.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <timeconv.h> /* XXX do we need this ? */ 45 #include <unistd.h> 46 #include <sysexits.h> 47 #include <unistd.h> 48 #include <fcntl.h> 49 50 #include <net/if.h> 51 #include <net/pfvar.h> 52 #include <net/route.h> /* def. of struct route */ 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/ip_icmp.h> 57 #include <netinet/icmp6.h> 58 #include <netinet/ip_fw.h> 59 #include <netinet/ip_dummynet.h> 60 #include <netinet/tcp.h> 61 #include <arpa/inet.h> 62 63 int 64 do_resolv, /* Would try to resolve all */ 65 do_time, /* Show time stamps */ 66 do_quiet, /* Be quiet in add and flush */ 67 do_pipe, /* this cmd refers to a pipe */ 68 do_sort, /* field to sort results (0 = no) */ 69 do_dynamic, /* display dynamic rules */ 70 do_expired, /* display expired dynamic rules */ 71 do_compact, /* show rules in compact mode */ 72 do_force, /* do not ask for confirmation */ 73 show_sets, /* display rule sets */ 74 test_only, /* only check syntax */ 75 comment_only, /* only print action and comment */ 76 verbose; 77 78 #define IP_MASK_ALL 0xffffffff 79 /* 80 * the following macro returns an error message if we run out of 81 * arguments. 82 */ 83 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 84 85 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 86 if (!ac) \ 87 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 88 if (_substrcmp(*av, "tablearg") == 0) { \ 89 arg = IP_FW_TABLEARG; \ 90 break; \ 91 } \ 92 \ 93 { \ 94 long val; \ 95 char *end; \ 96 \ 97 val = strtol(*av, &end, 10); \ 98 \ 99 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \ 100 errx(EX_DATAERR, "%s: invalid argument: %s", \ 101 match_value(s_x, tok), *av); \ 102 \ 103 if (errno == ERANGE || val < min || val > max) \ 104 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 105 match_value(s_x, tok), min, max, *av); \ 106 \ 107 if (val == IP_FW_TABLEARG) \ 108 errx(EX_DATAERR, "%s: illegal argument value: %s", \ 109 match_value(s_x, tok), *av); \ 110 arg = val; \ 111 } \ 112 } while (0) 113 114 #define PRINT_UINT_ARG(str, arg) do { \ 115 if (str != NULL) \ 116 printf("%s",str); \ 117 if (arg == IP_FW_TABLEARG) \ 118 printf("tablearg"); \ 119 else \ 120 printf("%u", (uint32_t)arg); \ 121 } while (0) 122 123 /* 124 * _s_x is a structure that stores a string <-> token pairs, used in 125 * various places in the parser. Entries are stored in arrays, 126 * with an entry with s=NULL as terminator. 127 * The search routines are match_token() and match_value(). 128 * Often, an element with x=0 contains an error string. 129 * 130 */ 131 struct _s_x { 132 char const *s; 133 int x; 134 }; 135 136 static struct _s_x f_tcpflags[] = { 137 { "syn", TH_SYN }, 138 { "fin", TH_FIN }, 139 { "ack", TH_ACK }, 140 { "psh", TH_PUSH }, 141 { "rst", TH_RST }, 142 { "urg", TH_URG }, 143 { "tcp flag", 0 }, 144 { NULL, 0 } 145 }; 146 147 static struct _s_x f_tcpopts[] = { 148 { "mss", IP_FW_TCPOPT_MSS }, 149 { "maxseg", IP_FW_TCPOPT_MSS }, 150 { "window", IP_FW_TCPOPT_WINDOW }, 151 { "sack", IP_FW_TCPOPT_SACK }, 152 { "ts", IP_FW_TCPOPT_TS }, 153 { "timestamp", IP_FW_TCPOPT_TS }, 154 { "cc", IP_FW_TCPOPT_CC }, 155 { "tcp option", 0 }, 156 { NULL, 0 } 157 }; 158 159 /* 160 * IP options span the range 0 to 255 so we need to remap them 161 * (though in fact only the low 5 bits are significant). 162 */ 163 static struct _s_x f_ipopts[] = { 164 { "ssrr", IP_FW_IPOPT_SSRR}, 165 { "lsrr", IP_FW_IPOPT_LSRR}, 166 { "rr", IP_FW_IPOPT_RR}, 167 { "ts", IP_FW_IPOPT_TS}, 168 { "ip option", 0 }, 169 { NULL, 0 } 170 }; 171 172 static struct _s_x f_iptos[] = { 173 { "lowdelay", IPTOS_LOWDELAY}, 174 { "throughput", IPTOS_THROUGHPUT}, 175 { "reliability", IPTOS_RELIABILITY}, 176 { "mincost", IPTOS_MINCOST}, 177 { "congestion", IPTOS_CE}, 178 { "ecntransport", IPTOS_ECT}, 179 { "ip tos option", 0}, 180 { NULL, 0 } 181 }; 182 183 static struct _s_x limit_masks[] = { 184 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 185 {"src-addr", DYN_SRC_ADDR}, 186 {"src-port", DYN_SRC_PORT}, 187 {"dst-addr", DYN_DST_ADDR}, 188 {"dst-port", DYN_DST_PORT}, 189 {NULL, 0} 190 }; 191 192 /* 193 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 194 * This is only used in this code. 195 */ 196 #define IPPROTO_ETHERTYPE 0x1000 197 static struct _s_x ether_types[] = { 198 /* 199 * Note, we cannot use "-:&/" in the names because they are field 200 * separators in the type specifications. Also, we use s = NULL as 201 * end-delimiter, because a type of 0 can be legal. 202 */ 203 { "ip", 0x0800 }, 204 { "ipv4", 0x0800 }, 205 { "ipv6", 0x86dd }, 206 { "arp", 0x0806 }, 207 { "rarp", 0x8035 }, 208 { "vlan", 0x8100 }, 209 { "loop", 0x9000 }, 210 { "trail", 0x1000 }, 211 { "at", 0x809b }, 212 { "atalk", 0x809b }, 213 { "aarp", 0x80f3 }, 214 { "pppoe_disc", 0x8863 }, 215 { "pppoe_sess", 0x8864 }, 216 { "ipx_8022", 0x00E0 }, 217 { "ipx_8023", 0x0000 }, 218 { "ipx_ii", 0x8137 }, 219 { "ipx_snap", 0x8137 }, 220 { "ipx", 0x8137 }, 221 { "ns", 0x0600 }, 222 { NULL, 0 } 223 }; 224 225 static void show_usage(void); 226 227 enum tokens { 228 TOK_NULL=0, 229 230 TOK_OR, 231 TOK_NOT, 232 TOK_STARTBRACE, 233 TOK_ENDBRACE, 234 235 TOK_ACCEPT, 236 TOK_COUNT, 237 TOK_PIPE, 238 TOK_QUEUE, 239 TOK_DIVERT, 240 TOK_TEE, 241 TOK_NETGRAPH, 242 TOK_NGTEE, 243 TOK_FORWARD, 244 TOK_SKIPTO, 245 TOK_DENY, 246 TOK_REJECT, 247 TOK_RESET, 248 TOK_UNREACH, 249 TOK_CHECKSTATE, 250 251 TOK_ALTQ, 252 TOK_LOG, 253 TOK_TAG, 254 TOK_UNTAG, 255 256 TOK_TAGGED, 257 TOK_UID, 258 TOK_GID, 259 TOK_JAIL, 260 TOK_IN, 261 TOK_LIMIT, 262 TOK_KEEPSTATE, 263 TOK_LAYER2, 264 TOK_OUT, 265 TOK_DIVERTED, 266 TOK_DIVERTEDLOOPBACK, 267 TOK_DIVERTEDOUTPUT, 268 TOK_XMIT, 269 TOK_RECV, 270 TOK_VIA, 271 TOK_FRAG, 272 TOK_IPOPTS, 273 TOK_IPLEN, 274 TOK_IPID, 275 TOK_IPPRECEDENCE, 276 TOK_IPTOS, 277 TOK_IPTTL, 278 TOK_IPVER, 279 TOK_ESTAB, 280 TOK_SETUP, 281 TOK_TCPDATALEN, 282 TOK_TCPFLAGS, 283 TOK_TCPOPTS, 284 TOK_TCPSEQ, 285 TOK_TCPACK, 286 TOK_TCPWIN, 287 TOK_ICMPTYPES, 288 TOK_MAC, 289 TOK_MACTYPE, 290 TOK_VERREVPATH, 291 TOK_VERSRCREACH, 292 TOK_ANTISPOOF, 293 TOK_IPSEC, 294 TOK_COMMENT, 295 296 TOK_PLR, 297 TOK_NOERROR, 298 TOK_BUCKETS, 299 TOK_DSTIP, 300 TOK_SRCIP, 301 TOK_DSTPORT, 302 TOK_SRCPORT, 303 TOK_ALL, 304 TOK_MASK, 305 TOK_BW, 306 TOK_DELAY, 307 TOK_RED, 308 TOK_GRED, 309 TOK_DROPTAIL, 310 TOK_PROTO, 311 TOK_WEIGHT, 312 313 TOK_IPV6, 314 TOK_FLOWID, 315 TOK_ICMP6TYPES, 316 TOK_EXT6HDR, 317 TOK_DSTIP6, 318 TOK_SRCIP6, 319 320 TOK_IPV4, 321 TOK_UNREACH6, 322 TOK_RESET6, 323 }; 324 325 struct _s_x dummynet_params[] = { 326 { "plr", TOK_PLR }, 327 { "noerror", TOK_NOERROR }, 328 { "buckets", TOK_BUCKETS }, 329 { "dst-ip", TOK_DSTIP }, 330 { "src-ip", TOK_SRCIP }, 331 { "dst-port", TOK_DSTPORT }, 332 { "src-port", TOK_SRCPORT }, 333 { "proto", TOK_PROTO }, 334 { "weight", TOK_WEIGHT }, 335 { "all", TOK_ALL }, 336 { "mask", TOK_MASK }, 337 { "droptail", TOK_DROPTAIL }, 338 { "red", TOK_RED }, 339 { "gred", TOK_GRED }, 340 { "bw", TOK_BW }, 341 { "bandwidth", TOK_BW }, 342 { "delay", TOK_DELAY }, 343 { "pipe", TOK_PIPE }, 344 { "queue", TOK_QUEUE }, 345 { "flow-id", TOK_FLOWID}, 346 { "dst-ipv6", TOK_DSTIP6}, 347 { "dst-ip6", TOK_DSTIP6}, 348 { "src-ipv6", TOK_SRCIP6}, 349 { "src-ip6", TOK_SRCIP6}, 350 { "dummynet-params", TOK_NULL }, 351 { NULL, 0 } /* terminator */ 352 }; 353 354 struct _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 { NULL, 0 } /* terminator */ 379 }; 380 381 struct _s_x rule_action_params[] = { 382 { "altq", TOK_ALTQ }, 383 { "log", TOK_LOG }, 384 { "tag", TOK_TAG }, 385 { "untag", TOK_UNTAG }, 386 { NULL, 0 } /* terminator */ 387 }; 388 389 struct _s_x rule_options[] = { 390 { "tagged", TOK_TAGGED }, 391 { "uid", TOK_UID }, 392 { "gid", TOK_GID }, 393 { "jail", TOK_JAIL }, 394 { "in", TOK_IN }, 395 { "limit", TOK_LIMIT }, 396 { "keep-state", TOK_KEEPSTATE }, 397 { "bridged", TOK_LAYER2 }, 398 { "layer2", TOK_LAYER2 }, 399 { "out", TOK_OUT }, 400 { "diverted", TOK_DIVERTED }, 401 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 402 { "diverted-output", TOK_DIVERTEDOUTPUT }, 403 { "xmit", TOK_XMIT }, 404 { "recv", TOK_RECV }, 405 { "via", TOK_VIA }, 406 { "fragment", TOK_FRAG }, 407 { "frag", TOK_FRAG }, 408 { "ipoptions", TOK_IPOPTS }, 409 { "ipopts", TOK_IPOPTS }, 410 { "iplen", TOK_IPLEN }, 411 { "ipid", TOK_IPID }, 412 { "ipprecedence", TOK_IPPRECEDENCE }, 413 { "iptos", TOK_IPTOS }, 414 { "ipttl", TOK_IPTTL }, 415 { "ipversion", TOK_IPVER }, 416 { "ipver", TOK_IPVER }, 417 { "estab", TOK_ESTAB }, 418 { "established", TOK_ESTAB }, 419 { "setup", TOK_SETUP }, 420 { "tcpdatalen", TOK_TCPDATALEN }, 421 { "tcpflags", TOK_TCPFLAGS }, 422 { "tcpflgs", TOK_TCPFLAGS }, 423 { "tcpoptions", TOK_TCPOPTS }, 424 { "tcpopts", TOK_TCPOPTS }, 425 { "tcpseq", TOK_TCPSEQ }, 426 { "tcpack", TOK_TCPACK }, 427 { "tcpwin", TOK_TCPWIN }, 428 { "icmptype", TOK_ICMPTYPES }, 429 { "icmptypes", TOK_ICMPTYPES }, 430 { "dst-ip", TOK_DSTIP }, 431 { "src-ip", TOK_SRCIP }, 432 { "dst-port", TOK_DSTPORT }, 433 { "src-port", TOK_SRCPORT }, 434 { "proto", TOK_PROTO }, 435 { "MAC", TOK_MAC }, 436 { "mac", TOK_MAC }, 437 { "mac-type", TOK_MACTYPE }, 438 { "verrevpath", TOK_VERREVPATH }, 439 { "versrcreach", TOK_VERSRCREACH }, 440 { "antispoof", TOK_ANTISPOOF }, 441 { "ipsec", TOK_IPSEC }, 442 { "icmp6type", TOK_ICMP6TYPES }, 443 { "icmp6types", TOK_ICMP6TYPES }, 444 { "ext6hdr", TOK_EXT6HDR}, 445 { "flow-id", TOK_FLOWID}, 446 { "ipv6", TOK_IPV6}, 447 { "ip6", TOK_IPV6}, 448 { "ipv4", TOK_IPV4}, 449 { "ip4", TOK_IPV4}, 450 { "dst-ipv6", TOK_DSTIP6}, 451 { "dst-ip6", TOK_DSTIP6}, 452 { "src-ipv6", TOK_SRCIP6}, 453 { "src-ip6", TOK_SRCIP6}, 454 { "//", TOK_COMMENT }, 455 456 { "not", TOK_NOT }, /* pseudo option */ 457 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 458 { "or", TOK_OR }, /* pseudo option */ 459 { "|", /* escape */ TOK_OR }, /* pseudo option */ 460 { "{", TOK_STARTBRACE }, /* pseudo option */ 461 { "(", TOK_STARTBRACE }, /* pseudo option */ 462 { "}", TOK_ENDBRACE }, /* pseudo option */ 463 { ")", TOK_ENDBRACE }, /* pseudo option */ 464 { NULL, 0 } /* terminator */ 465 }; 466 467 #define TABLEARG "tablearg" 468 469 static __inline uint64_t 470 align_uint64(uint64_t *pll) { 471 uint64_t ret; 472 473 bcopy (pll, &ret, sizeof(ret)); 474 return ret; 475 } 476 477 /* 478 * conditionally runs the command. 479 */ 480 static int 481 do_cmd(int optname, void *optval, uintptr_t optlen) 482 { 483 static int s = -1; /* the socket */ 484 int i; 485 486 if (test_only) 487 return 0; 488 489 if (s == -1) 490 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 491 if (s < 0) 492 err(EX_UNAVAILABLE, "socket"); 493 494 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 495 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 496 optname == IP_FW_TABLE_GETSIZE) 497 i = getsockopt(s, IPPROTO_IP, optname, optval, 498 (socklen_t *)optlen); 499 else 500 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 501 return i; 502 } 503 504 /** 505 * match_token takes a table and a string, returns the value associated 506 * with the string (-1 in case of failure). 507 */ 508 static int 509 match_token(struct _s_x *table, char *string) 510 { 511 struct _s_x *pt; 512 uint i = strlen(string); 513 514 for (pt = table ; i && pt->s != NULL ; pt++) 515 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 516 return pt->x; 517 return -1; 518 } 519 520 /** 521 * match_value takes a table and a value, returns the string associated 522 * with the value (NULL in case of failure). 523 */ 524 static char const * 525 match_value(struct _s_x *p, int value) 526 { 527 for (; p->s != NULL; p++) 528 if (p->x == value) 529 return p->s; 530 return NULL; 531 } 532 533 /* 534 * _substrcmp takes two strings and returns 1 if they do not match, 535 * and 0 if they match exactly or the first string is a sub-string 536 * of the second. A warning is printed to stderr in the case that the 537 * first string is a sub-string of the second. 538 * 539 * This function will be removed in the future through the usual 540 * deprecation process. 541 */ 542 static int 543 _substrcmp(const char *str1, const char* str2) 544 { 545 546 if (strncmp(str1, str2, strlen(str1)) != 0) 547 return 1; 548 549 if (strlen(str1) != strlen(str2)) 550 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 551 str1, str2); 552 return 0; 553 } 554 555 /* 556 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 557 * and 0 if they match exactly or the second string is a sub-string 558 * of the first. A warning is printed to stderr in the case that the 559 * first string does not match the third. 560 * 561 * This function exists to warn about the bizzare construction 562 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 563 * for "bytes". The problem is that in addition to accepting "by", 564 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 565 * other string beginning with "by". 566 * 567 * This function will be removed in the future through the usual 568 * deprecation process. 569 */ 570 static int 571 _substrcmp2(const char *str1, const char* str2, const char* str3) 572 { 573 574 if (strncmp(str1, str2, strlen(str2)) != 0) 575 return 1; 576 577 if (strcmp(str1, str3) != 0) 578 warnx("DEPRECATED: '%s' matched '%s'", 579 str1, str3); 580 return 0; 581 } 582 583 /* 584 * prints one port, symbolic or numeric 585 */ 586 static void 587 print_port(int proto, uint16_t port) 588 { 589 590 if (proto == IPPROTO_ETHERTYPE) { 591 char const *s; 592 593 if (do_resolv && (s = match_value(ether_types, port)) ) 594 printf("%s", s); 595 else 596 printf("0x%04x", port); 597 } else { 598 struct servent *se = NULL; 599 if (do_resolv) { 600 struct protoent *pe = getprotobynumber(proto); 601 602 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 603 } 604 if (se) 605 printf("%s", se->s_name); 606 else 607 printf("%d", port); 608 } 609 } 610 611 struct _s_x _port_name[] = { 612 {"dst-port", O_IP_DSTPORT}, 613 {"src-port", O_IP_SRCPORT}, 614 {"ipid", O_IPID}, 615 {"iplen", O_IPLEN}, 616 {"ipttl", O_IPTTL}, 617 {"mac-type", O_MAC_TYPE}, 618 {"tcpdatalen", O_TCPDATALEN}, 619 {"tagged", O_TAGGED}, 620 {NULL, 0} 621 }; 622 623 /* 624 * Print the values in a list 16-bit items of the types above. 625 * XXX todo: add support for mask. 626 */ 627 static void 628 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 629 { 630 uint16_t *p = cmd->ports; 631 int i; 632 char const *sep; 633 634 if (cmd->o.len & F_NOT) 635 printf(" not"); 636 if (opcode != 0) { 637 sep = match_value(_port_name, opcode); 638 if (sep == NULL) 639 sep = "???"; 640 printf (" %s", sep); 641 } 642 sep = " "; 643 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 644 printf(sep); 645 print_port(proto, p[0]); 646 if (p[0] != p[1]) { 647 printf("-"); 648 print_port(proto, p[1]); 649 } 650 sep = ","; 651 } 652 } 653 654 /* 655 * Like strtol, but also translates service names into port numbers 656 * for some protocols. 657 * In particular: 658 * proto == -1 disables the protocol check; 659 * proto == IPPROTO_ETHERTYPE looks up an internal table 660 * proto == <some value in /etc/protocols> matches the values there. 661 * Returns *end == s in case the parameter is not found. 662 */ 663 static int 664 strtoport(char *s, char **end, int base, int proto) 665 { 666 char *p, *buf; 667 char *s1; 668 int i; 669 670 *end = s; /* default - not found */ 671 if (*s == '\0') 672 return 0; /* not found */ 673 674 if (isdigit(*s)) 675 return strtol(s, end, base); 676 677 /* 678 * find separator. '\\' escapes the next char. 679 */ 680 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 681 if (*s1 == '\\' && s1[1] != '\0') 682 s1++; 683 684 buf = malloc(s1 - s + 1); 685 if (buf == NULL) 686 return 0; 687 688 /* 689 * copy into a buffer skipping backslashes 690 */ 691 for (p = s, i = 0; p != s1 ; p++) 692 if (*p != '\\') 693 buf[i++] = *p; 694 buf[i++] = '\0'; 695 696 if (proto == IPPROTO_ETHERTYPE) { 697 i = match_token(ether_types, buf); 698 free(buf); 699 if (i != -1) { /* found */ 700 *end = s1; 701 return i; 702 } 703 } else { 704 struct protoent *pe = NULL; 705 struct servent *se; 706 707 if (proto != 0) 708 pe = getprotobynumber(proto); 709 setservent(1); 710 se = getservbyname(buf, pe ? pe->p_name : NULL); 711 free(buf); 712 if (se != NULL) { 713 *end = s1; 714 return ntohs(se->s_port); 715 } 716 } 717 return 0; /* not found */ 718 } 719 720 /* 721 * Map between current altq queue id numbers and names. 722 */ 723 static int altq_fetched = 0; 724 static TAILQ_HEAD(, pf_altq) altq_entries = 725 TAILQ_HEAD_INITIALIZER(altq_entries); 726 727 static void 728 altq_set_enabled(int enabled) 729 { 730 int pffd; 731 732 pffd = open("/dev/pf", O_RDWR); 733 if (pffd == -1) 734 err(EX_UNAVAILABLE, 735 "altq support opening pf(4) control device"); 736 if (enabled) { 737 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 738 err(EX_UNAVAILABLE, "enabling altq"); 739 } else { 740 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 741 err(EX_UNAVAILABLE, "disabling altq"); 742 } 743 close(pffd); 744 } 745 746 static void 747 altq_fetch() 748 { 749 struct pfioc_altq pfioc; 750 struct pf_altq *altq; 751 int pffd, mnr; 752 753 if (altq_fetched) 754 return; 755 altq_fetched = 1; 756 pffd = open("/dev/pf", O_RDONLY); 757 if (pffd == -1) { 758 warn("altq support opening pf(4) control device"); 759 return; 760 } 761 bzero(&pfioc, sizeof(pfioc)); 762 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 763 warn("altq support getting queue list"); 764 close(pffd); 765 return; 766 } 767 mnr = pfioc.nr; 768 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 769 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 770 if (errno == EBUSY) 771 break; 772 warn("altq support getting queue list"); 773 close(pffd); 774 return; 775 } 776 if (pfioc.altq.qid == 0) 777 continue; 778 altq = malloc(sizeof(*altq)); 779 if (altq == NULL) 780 err(EX_OSERR, "malloc"); 781 *altq = pfioc.altq; 782 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 783 } 784 close(pffd); 785 } 786 787 static u_int32_t 788 altq_name_to_qid(const char *name) 789 { 790 struct pf_altq *altq; 791 792 altq_fetch(); 793 TAILQ_FOREACH(altq, &altq_entries, entries) 794 if (strcmp(name, altq->qname) == 0) 795 break; 796 if (altq == NULL) 797 errx(EX_DATAERR, "altq has no queue named `%s'", name); 798 return altq->qid; 799 } 800 801 static const char * 802 altq_qid_to_name(u_int32_t qid) 803 { 804 struct pf_altq *altq; 805 806 altq_fetch(); 807 TAILQ_FOREACH(altq, &altq_entries, entries) 808 if (qid == altq->qid) 809 break; 810 if (altq == NULL) 811 return NULL; 812 return altq->qname; 813 } 814 815 static void 816 fill_altq_qid(u_int32_t *qid, const char *av) 817 { 818 *qid = altq_name_to_qid(av); 819 } 820 821 /* 822 * Fill the body of the command with the list of port ranges. 823 */ 824 static int 825 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 826 { 827 uint16_t a, b, *p = cmd->ports; 828 int i = 0; 829 char *s = av; 830 831 while (*s) { 832 a = strtoport(av, &s, 0, proto); 833 if (s == av) /* empty or invalid argument */ 834 return (0); 835 836 switch (*s) { 837 case '-': /* a range */ 838 av = s + 1; 839 b = strtoport(av, &s, 0, proto); 840 /* Reject expressions like '1-abc' or '1-2-3'. */ 841 if (s == av || (*s != ',' && *s != '\0')) 842 return (0); 843 p[0] = a; 844 p[1] = b; 845 break; 846 case ',': /* comma separated list */ 847 case '\0': 848 p[0] = p[1] = a; 849 break; 850 default: 851 warnx("port list: invalid separator <%c> in <%s>", 852 *s, av); 853 return (0); 854 } 855 856 i++; 857 p += 2; 858 av = s + 1; 859 } 860 if (i > 0) { 861 if (i + 1 > F_LEN_MASK) 862 errx(EX_DATAERR, "too many ports/ranges\n"); 863 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 864 } 865 return (i); 866 } 867 868 static struct _s_x icmpcodes[] = { 869 { "net", ICMP_UNREACH_NET }, 870 { "host", ICMP_UNREACH_HOST }, 871 { "protocol", ICMP_UNREACH_PROTOCOL }, 872 { "port", ICMP_UNREACH_PORT }, 873 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 874 { "srcfail", ICMP_UNREACH_SRCFAIL }, 875 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 876 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 877 { "isolated", ICMP_UNREACH_ISOLATED }, 878 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 879 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 880 { "tosnet", ICMP_UNREACH_TOSNET }, 881 { "toshost", ICMP_UNREACH_TOSHOST }, 882 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 883 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 884 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 885 { NULL, 0 } 886 }; 887 888 static void 889 fill_reject_code(u_short *codep, char *str) 890 { 891 int val; 892 char *s; 893 894 val = strtoul(str, &s, 0); 895 if (s == str || *s != '\0' || val >= 0x100) 896 val = match_token(icmpcodes, str); 897 if (val < 0) 898 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 899 *codep = val; 900 return; 901 } 902 903 static void 904 print_reject_code(uint16_t code) 905 { 906 char const *s = match_value(icmpcodes, code); 907 908 if (s != NULL) 909 printf("unreach %s", s); 910 else 911 printf("unreach %u", code); 912 } 913 914 static struct _s_x icmp6codes[] = { 915 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 916 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 917 { "address", ICMP6_DST_UNREACH_ADDR }, 918 { "port", ICMP6_DST_UNREACH_NOPORT }, 919 { NULL, 0 } 920 }; 921 922 static void 923 fill_unreach6_code(u_short *codep, char *str) 924 { 925 int val; 926 char *s; 927 928 val = strtoul(str, &s, 0); 929 if (s == str || *s != '\0' || val >= 0x100) 930 val = match_token(icmp6codes, str); 931 if (val < 0) 932 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 933 *codep = val; 934 return; 935 } 936 937 static void 938 print_unreach6_code(uint16_t code) 939 { 940 char const *s = match_value(icmp6codes, code); 941 942 if (s != NULL) 943 printf("unreach6 %s", s); 944 else 945 printf("unreach6 %u", code); 946 } 947 948 /* 949 * Returns the number of bits set (from left) in a contiguous bitmask, 950 * or -1 if the mask is not contiguous. 951 * XXX this needs a proper fix. 952 * This effectively works on masks in big-endian (network) format. 953 * when compiled on little endian architectures. 954 * 955 * First bit is bit 7 of the first byte -- note, for MAC addresses, 956 * the first bit on the wire is bit 0 of the first byte. 957 * len is the max length in bits. 958 */ 959 static int 960 contigmask(uint8_t *p, int len) 961 { 962 int i, n; 963 964 for (i=0; i<len ; i++) 965 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 966 break; 967 for (n=i+1; n < len; n++) 968 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 969 return -1; /* mask not contiguous */ 970 return i; 971 } 972 973 /* 974 * print flags set/clear in the two bitmasks passed as parameters. 975 * There is a specialized check for f_tcpflags. 976 */ 977 static void 978 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 979 { 980 char const *comma = ""; 981 int i; 982 uint8_t set = cmd->arg1 & 0xff; 983 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 984 985 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 986 printf(" setup"); 987 return; 988 } 989 990 printf(" %s ", name); 991 for (i=0; list[i].x != 0; i++) { 992 if (set & list[i].x) { 993 set &= ~list[i].x; 994 printf("%s%s", comma, list[i].s); 995 comma = ","; 996 } 997 if (clear & list[i].x) { 998 clear &= ~list[i].x; 999 printf("%s!%s", comma, list[i].s); 1000 comma = ","; 1001 } 1002 } 1003 } 1004 1005 /* 1006 * Print the ip address contained in a command. 1007 */ 1008 static void 1009 print_ip(ipfw_insn_ip *cmd, char const *s) 1010 { 1011 struct hostent *he = NULL; 1012 int len = F_LEN((ipfw_insn *)cmd); 1013 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1014 1015 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1016 1017 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1018 printf("me"); 1019 return; 1020 } 1021 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1022 cmd->o.opcode == O_IP_DST_LOOKUP) { 1023 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 1024 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1025 printf(",%u", *a); 1026 printf(")"); 1027 return; 1028 } 1029 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1030 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1031 int i, j; 1032 char comma = '{'; 1033 1034 x = cmd->o.arg1 - 1; 1035 x = htonl( ~x ); 1036 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1037 printf("%s/%d", inet_ntoa(cmd->addr), 1038 contigmask((uint8_t *)&x, 32)); 1039 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1040 x &= 0xff; /* base */ 1041 /* 1042 * Print bits and ranges. 1043 * Locate first bit set (i), then locate first bit unset (j). 1044 * If we have 3+ consecutive bits set, then print them as a 1045 * range, otherwise only print the initial bit and rescan. 1046 */ 1047 for (i=0; i < cmd->o.arg1; i++) 1048 if (map[i/32] & (1<<(i & 31))) { 1049 for (j=i+1; j < cmd->o.arg1; j++) 1050 if (!(map[ j/32] & (1<<(j & 31)))) 1051 break; 1052 printf("%c%d", comma, i+x); 1053 if (j>i+2) { /* range has at least 3 elements */ 1054 printf("-%d", j-1+x); 1055 i = j-1; 1056 } 1057 comma = ','; 1058 } 1059 printf("}"); 1060 return; 1061 } 1062 /* 1063 * len == 2 indicates a single IP, whereas lists of 1 or more 1064 * addr/mask pairs have len = (2n+1). We convert len to n so we 1065 * use that to count the number of entries. 1066 */ 1067 for (len = len / 2; len > 0; len--, a += 2) { 1068 int mb = /* mask length */ 1069 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1070 32 : contigmask((uint8_t *)&(a[1]), 32); 1071 if (mb == 32 && do_resolv) 1072 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1073 if (he != NULL) /* resolved to name */ 1074 printf("%s", he->h_name); 1075 else if (mb == 0) /* any */ 1076 printf("any"); 1077 else { /* numeric IP followed by some kind of mask */ 1078 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 1079 if (mb < 0) 1080 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 1081 else if (mb < 32) 1082 printf("/%d", mb); 1083 } 1084 if (len > 1) 1085 printf(","); 1086 } 1087 } 1088 1089 /* 1090 * prints a MAC address/mask pair 1091 */ 1092 static void 1093 print_mac(uint8_t *addr, uint8_t *mask) 1094 { 1095 int l = contigmask(mask, 48); 1096 1097 if (l == 0) 1098 printf(" any"); 1099 else { 1100 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1101 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1102 if (l == -1) 1103 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1104 mask[0], mask[1], mask[2], 1105 mask[3], mask[4], mask[5]); 1106 else if (l < 48) 1107 printf("/%d", l); 1108 } 1109 } 1110 1111 static void 1112 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1113 { 1114 uint8_t type; 1115 1116 cmd->d[0] = 0; 1117 while (*av) { 1118 if (*av == ',') 1119 av++; 1120 1121 type = strtoul(av, &av, 0); 1122 1123 if (*av != ',' && *av != '\0') 1124 errx(EX_DATAERR, "invalid ICMP type"); 1125 1126 if (type > 31) 1127 errx(EX_DATAERR, "ICMP type out of range"); 1128 1129 cmd->d[0] |= 1 << type; 1130 } 1131 cmd->o.opcode = O_ICMPTYPE; 1132 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1133 } 1134 1135 static void 1136 print_icmptypes(ipfw_insn_u32 *cmd) 1137 { 1138 int i; 1139 char sep= ' '; 1140 1141 printf(" icmptypes"); 1142 for (i = 0; i < 32; i++) { 1143 if ( (cmd->d[0] & (1 << (i))) == 0) 1144 continue; 1145 printf("%c%d", sep, i); 1146 sep = ','; 1147 } 1148 } 1149 1150 /* 1151 * Print the ip address contained in a command. 1152 */ 1153 static void 1154 print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1155 { 1156 struct hostent *he = NULL; 1157 int len = F_LEN((ipfw_insn *) cmd) - 1; 1158 struct in6_addr *a = &(cmd->addr6); 1159 char trad[255]; 1160 1161 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1162 1163 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1164 printf("me6"); 1165 return; 1166 } 1167 if (cmd->o.opcode == O_IP6) { 1168 printf(" ip6"); 1169 return; 1170 } 1171 1172 /* 1173 * len == 4 indicates a single IP, whereas lists of 1 or more 1174 * addr/mask pairs have len = (2n+1). We convert len to n so we 1175 * use that to count the number of entries. 1176 */ 1177 1178 for (len = len / 4; len > 0; len -= 2, a += 2) { 1179 int mb = /* mask length */ 1180 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1181 128 : contigmask((uint8_t *)&(a[1]), 128); 1182 1183 if (mb == 128 && do_resolv) 1184 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1185 if (he != NULL) /* resolved to name */ 1186 printf("%s", he->h_name); 1187 else if (mb == 0) /* any */ 1188 printf("any"); 1189 else { /* numeric IP followed by some kind of mask */ 1190 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1191 printf("Error ntop in print_ip6\n"); 1192 printf("%s", trad ); 1193 if (mb < 0) /* XXX not really legal... */ 1194 printf(":%s", 1195 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1196 else if (mb < 128) 1197 printf("/%d", mb); 1198 } 1199 if (len > 2) 1200 printf(","); 1201 } 1202 } 1203 1204 static void 1205 fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1206 { 1207 uint8_t type; 1208 1209 bzero(cmd, sizeof(*cmd)); 1210 while (*av) { 1211 if (*av == ',') 1212 av++; 1213 type = strtoul(av, &av, 0); 1214 if (*av != ',' && *av != '\0') 1215 errx(EX_DATAERR, "invalid ICMP6 type"); 1216 /* 1217 * XXX: shouldn't this be 0xFF? I can't see any reason why 1218 * we shouldn't be able to filter all possiable values 1219 * regardless of the ability of the rest of the kernel to do 1220 * anything useful with them. 1221 */ 1222 if (type > ICMP6_MAXTYPE) 1223 errx(EX_DATAERR, "ICMP6 type out of range"); 1224 cmd->d[type / 32] |= ( 1 << (type % 32)); 1225 } 1226 cmd->o.opcode = O_ICMP6TYPE; 1227 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1228 } 1229 1230 1231 static void 1232 print_icmp6types(ipfw_insn_u32 *cmd) 1233 { 1234 int i, j; 1235 char sep= ' '; 1236 1237 printf(" ip6 icmp6types"); 1238 for (i = 0; i < 7; i++) 1239 for (j=0; j < 32; ++j) { 1240 if ( (cmd->d[i] & (1 << (j))) == 0) 1241 continue; 1242 printf("%c%d", sep, (i*32 + j)); 1243 sep = ','; 1244 } 1245 } 1246 1247 static void 1248 print_flow6id( ipfw_insn_u32 *cmd) 1249 { 1250 uint16_t i, limit = cmd->o.arg1; 1251 char sep = ','; 1252 1253 printf(" flow-id "); 1254 for( i=0; i < limit; ++i) { 1255 if (i == limit - 1) 1256 sep = ' '; 1257 printf("%d%c", cmd->d[i], sep); 1258 } 1259 } 1260 1261 /* structure and define for the extension header in ipv6 */ 1262 static struct _s_x ext6hdrcodes[] = { 1263 { "frag", EXT_FRAGMENT }, 1264 { "hopopt", EXT_HOPOPTS }, 1265 { "route", EXT_ROUTING }, 1266 { "dstopt", EXT_DSTOPTS }, 1267 { "ah", EXT_AH }, 1268 { "esp", EXT_ESP }, 1269 { NULL, 0 } 1270 }; 1271 1272 /* fills command for the extension header filtering */ 1273 int 1274 fill_ext6hdr( ipfw_insn *cmd, char *av) 1275 { 1276 int tok; 1277 char *s = av; 1278 1279 cmd->arg1 = 0; 1280 1281 while(s) { 1282 av = strsep( &s, ",") ; 1283 tok = match_token(ext6hdrcodes, av); 1284 switch (tok) { 1285 case EXT_FRAGMENT: 1286 cmd->arg1 |= EXT_FRAGMENT; 1287 break; 1288 1289 case EXT_HOPOPTS: 1290 cmd->arg1 |= EXT_HOPOPTS; 1291 break; 1292 1293 case EXT_ROUTING: 1294 cmd->arg1 |= EXT_ROUTING; 1295 break; 1296 1297 case EXT_DSTOPTS: 1298 cmd->arg1 |= EXT_DSTOPTS; 1299 break; 1300 1301 case EXT_AH: 1302 cmd->arg1 |= EXT_AH; 1303 break; 1304 1305 case EXT_ESP: 1306 cmd->arg1 |= EXT_ESP; 1307 break; 1308 1309 default: 1310 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1311 break; 1312 } 1313 } 1314 if (cmd->arg1 == 0 ) 1315 return 0; 1316 cmd->opcode = O_EXT_HDR; 1317 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1318 return 1; 1319 } 1320 1321 void 1322 print_ext6hdr( ipfw_insn *cmd ) 1323 { 1324 char sep = ' '; 1325 1326 printf(" extension header:"); 1327 if (cmd->arg1 & EXT_FRAGMENT ) { 1328 printf("%cfragmentation", sep); 1329 sep = ','; 1330 } 1331 if (cmd->arg1 & EXT_HOPOPTS ) { 1332 printf("%chop options", sep); 1333 sep = ','; 1334 } 1335 if (cmd->arg1 & EXT_ROUTING ) { 1336 printf("%crouting options", sep); 1337 sep = ','; 1338 } 1339 if (cmd->arg1 & EXT_DSTOPTS ) { 1340 printf("%cdestination options", sep); 1341 sep = ','; 1342 } 1343 if (cmd->arg1 & EXT_AH ) { 1344 printf("%cauthentication header", sep); 1345 sep = ','; 1346 } 1347 if (cmd->arg1 & EXT_ESP ) { 1348 printf("%cencapsulated security payload", sep); 1349 } 1350 } 1351 1352 /* 1353 * show_ipfw() prints the body of an ipfw rule. 1354 * Because the standard rule has at least proto src_ip dst_ip, we use 1355 * a helper function to produce these entries if not provided explicitly. 1356 * The first argument is the list of fields we have, the second is 1357 * the list of fields we want to be printed. 1358 * 1359 * Special cases if we have provided a MAC header: 1360 * + if the rule does not contain IP addresses/ports, do not print them; 1361 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1362 * 1363 * Once we have 'have_options', IP header fields are printed as options. 1364 */ 1365 #define HAVE_PROTO 0x0001 1366 #define HAVE_SRCIP 0x0002 1367 #define HAVE_DSTIP 0x0004 1368 #define HAVE_MAC 0x0008 1369 #define HAVE_MACTYPE 0x0010 1370 #define HAVE_PROTO4 0x0040 1371 #define HAVE_PROTO6 0x0080 1372 #define HAVE_OPTIONS 0x8000 1373 1374 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1375 static void 1376 show_prerequisites(int *flags, int want, int cmd) 1377 { 1378 if (comment_only) 1379 return; 1380 if ( (*flags & HAVE_IP) == HAVE_IP) 1381 *flags |= HAVE_OPTIONS; 1382 1383 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 1384 cmd != O_MAC_TYPE) { 1385 /* 1386 * mac-type was optimized out by the compiler, 1387 * restore it 1388 */ 1389 printf(" any"); 1390 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 1391 return; 1392 } 1393 if ( !(*flags & HAVE_OPTIONS)) { 1394 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1395 if ( (*flags & HAVE_PROTO4)) 1396 printf(" ip4"); 1397 else if ( (*flags & HAVE_PROTO6)) 1398 printf(" ip6"); 1399 else 1400 printf(" ip"); 1401 1402 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1403 printf(" from any"); 1404 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1405 printf(" to any"); 1406 } 1407 *flags |= want; 1408 } 1409 1410 static void 1411 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1412 { 1413 static int twidth = 0; 1414 int l; 1415 ipfw_insn *cmd, *tagptr = NULL; 1416 char *comment = NULL; /* ptr to comment if we have one */ 1417 int proto = 0; /* default */ 1418 int flags = 0; /* prerequisites */ 1419 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1420 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1421 int or_block = 0; /* we are in an or block */ 1422 uint32_t set_disable; 1423 1424 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1425 1426 if (set_disable & (1 << rule->set)) { /* disabled */ 1427 if (!show_sets) 1428 return; 1429 else 1430 printf("# DISABLED "); 1431 } 1432 printf("%05u ", rule->rulenum); 1433 1434 if (pcwidth>0 || bcwidth>0) 1435 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1436 bcwidth, align_uint64(&rule->bcnt)); 1437 1438 if (do_time == 2) 1439 printf("%10u ", rule->timestamp); 1440 else if (do_time == 1) { 1441 char timestr[30]; 1442 time_t t = (time_t)0; 1443 1444 if (twidth == 0) { 1445 strcpy(timestr, ctime(&t)); 1446 *strchr(timestr, '\n') = '\0'; 1447 twidth = strlen(timestr); 1448 } 1449 if (rule->timestamp) { 1450 t = _long_to_time(rule->timestamp); 1451 1452 strcpy(timestr, ctime(&t)); 1453 *strchr(timestr, '\n') = '\0'; 1454 printf("%s ", timestr); 1455 } else { 1456 printf("%*s", twidth, " "); 1457 } 1458 } 1459 1460 if (show_sets) 1461 printf("set %d ", rule->set); 1462 1463 /* 1464 * print the optional "match probability" 1465 */ 1466 if (rule->cmd_len > 0) { 1467 cmd = rule->cmd ; 1468 if (cmd->opcode == O_PROB) { 1469 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1470 double d = 1.0 * p->d[0]; 1471 1472 d = (d / 0x7fffffff); 1473 printf("prob %f ", d); 1474 } 1475 } 1476 1477 /* 1478 * first print actions 1479 */ 1480 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1481 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1482 switch(cmd->opcode) { 1483 case O_CHECK_STATE: 1484 printf("check-state"); 1485 flags = HAVE_IP; /* avoid printing anything else */ 1486 break; 1487 1488 case O_ACCEPT: 1489 printf("allow"); 1490 break; 1491 1492 case O_COUNT: 1493 printf("count"); 1494 break; 1495 1496 case O_DENY: 1497 printf("deny"); 1498 break; 1499 1500 case O_REJECT: 1501 if (cmd->arg1 == ICMP_REJECT_RST) 1502 printf("reset"); 1503 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1504 printf("reject"); 1505 else 1506 print_reject_code(cmd->arg1); 1507 break; 1508 1509 case O_UNREACH6: 1510 if (cmd->arg1 == ICMP6_UNREACH_RST) 1511 printf("reset6"); 1512 else 1513 print_unreach6_code(cmd->arg1); 1514 break; 1515 1516 case O_SKIPTO: 1517 PRINT_UINT_ARG("skipto ", cmd->arg1); 1518 break; 1519 1520 case O_PIPE: 1521 PRINT_UINT_ARG("pipe ", cmd->arg1); 1522 break; 1523 1524 case O_QUEUE: 1525 PRINT_UINT_ARG("queue ", cmd->arg1); 1526 break; 1527 1528 case O_DIVERT: 1529 PRINT_UINT_ARG("divert ", cmd->arg1); 1530 break; 1531 1532 case O_TEE: 1533 PRINT_UINT_ARG("tee ", cmd->arg1); 1534 break; 1535 1536 case O_NETGRAPH: 1537 PRINT_UINT_ARG("netgraph ", cmd->arg1); 1538 break; 1539 1540 case O_NGTEE: 1541 PRINT_UINT_ARG("ngtee ", cmd->arg1); 1542 break; 1543 1544 case O_FORWARD_IP: 1545 { 1546 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1547 1548 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1549 printf("fwd tablearg"); 1550 } else { 1551 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1552 } 1553 if (s->sa.sin_port) 1554 printf(",%d", s->sa.sin_port); 1555 } 1556 break; 1557 1558 case O_LOG: /* O_LOG is printed last */ 1559 logptr = (ipfw_insn_log *)cmd; 1560 break; 1561 1562 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1563 altqptr = (ipfw_insn_altq *)cmd; 1564 break; 1565 1566 case O_TAG: 1567 tagptr = cmd; 1568 break; 1569 1570 default: 1571 printf("** unrecognized action %d len %d ", 1572 cmd->opcode, cmd->len); 1573 } 1574 } 1575 if (logptr) { 1576 if (logptr->max_log > 0) 1577 printf(" log logamount %d", logptr->max_log); 1578 else 1579 printf(" log"); 1580 } 1581 if (altqptr) { 1582 const char *qname; 1583 1584 qname = altq_qid_to_name(altqptr->qid); 1585 if (qname == NULL) 1586 printf(" altq ?<%u>", altqptr->qid); 1587 else 1588 printf(" altq %s", qname); 1589 } 1590 if (tagptr) { 1591 if (tagptr->len & F_NOT) 1592 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1593 else 1594 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1595 } 1596 1597 /* 1598 * then print the body. 1599 */ 1600 for (l = rule->act_ofs, cmd = rule->cmd ; 1601 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1602 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1603 continue; 1604 if (cmd->opcode == O_IP4) { 1605 flags |= HAVE_PROTO4; 1606 break; 1607 } else if (cmd->opcode == O_IP6) { 1608 flags |= HAVE_PROTO6; 1609 break; 1610 } 1611 } 1612 if (rule->_pad & 1) { /* empty rules before options */ 1613 if (!do_compact) { 1614 show_prerequisites(&flags, HAVE_PROTO, 0); 1615 printf(" from any to any"); 1616 } 1617 flags |= HAVE_IP | HAVE_OPTIONS; 1618 } 1619 1620 if (comment_only) 1621 comment = "..."; 1622 1623 for (l = rule->act_ofs, cmd = rule->cmd ; 1624 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1625 /* useful alias */ 1626 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1627 1628 if (comment_only) { 1629 if (cmd->opcode != O_NOP) 1630 continue; 1631 printf(" // %s\n", (char *)(cmd + 1)); 1632 return; 1633 } 1634 1635 show_prerequisites(&flags, 0, cmd->opcode); 1636 1637 switch(cmd->opcode) { 1638 case O_PROB: 1639 break; /* done already */ 1640 1641 case O_PROBE_STATE: 1642 break; /* no need to print anything here */ 1643 1644 case O_MACADDR2: { 1645 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1646 1647 if ((cmd->len & F_OR) && !or_block) 1648 printf(" {"); 1649 if (cmd->len & F_NOT) 1650 printf(" not"); 1651 printf(" MAC"); 1652 flags |= HAVE_MAC; 1653 print_mac(m->addr, m->mask); 1654 print_mac(m->addr + 6, m->mask + 6); 1655 } 1656 break; 1657 1658 case O_MAC_TYPE: 1659 if ((cmd->len & F_OR) && !or_block) 1660 printf(" {"); 1661 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1662 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1663 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1664 break; 1665 1666 case O_IP_SRC: 1667 case O_IP_SRC_LOOKUP: 1668 case O_IP_SRC_MASK: 1669 case O_IP_SRC_ME: 1670 case O_IP_SRC_SET: 1671 show_prerequisites(&flags, HAVE_PROTO, 0); 1672 if (!(flags & HAVE_SRCIP)) 1673 printf(" from"); 1674 if ((cmd->len & F_OR) && !or_block) 1675 printf(" {"); 1676 print_ip((ipfw_insn_ip *)cmd, 1677 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1678 flags |= HAVE_SRCIP; 1679 break; 1680 1681 case O_IP_DST: 1682 case O_IP_DST_LOOKUP: 1683 case O_IP_DST_MASK: 1684 case O_IP_DST_ME: 1685 case O_IP_DST_SET: 1686 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1687 if (!(flags & HAVE_DSTIP)) 1688 printf(" to"); 1689 if ((cmd->len & F_OR) && !or_block) 1690 printf(" {"); 1691 print_ip((ipfw_insn_ip *)cmd, 1692 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1693 flags |= HAVE_DSTIP; 1694 break; 1695 1696 case O_IP6_SRC: 1697 case O_IP6_SRC_MASK: 1698 case O_IP6_SRC_ME: 1699 show_prerequisites(&flags, HAVE_PROTO, 0); 1700 if (!(flags & HAVE_SRCIP)) 1701 printf(" from"); 1702 if ((cmd->len & F_OR) && !or_block) 1703 printf(" {"); 1704 print_ip6((ipfw_insn_ip6 *)cmd, 1705 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1706 flags |= HAVE_SRCIP | HAVE_PROTO; 1707 break; 1708 1709 case O_IP6_DST: 1710 case O_IP6_DST_MASK: 1711 case O_IP6_DST_ME: 1712 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1713 if (!(flags & HAVE_DSTIP)) 1714 printf(" to"); 1715 if ((cmd->len & F_OR) && !or_block) 1716 printf(" {"); 1717 print_ip6((ipfw_insn_ip6 *)cmd, 1718 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1719 flags |= HAVE_DSTIP; 1720 break; 1721 1722 case O_FLOW6ID: 1723 print_flow6id( (ipfw_insn_u32 *) cmd ); 1724 flags |= HAVE_OPTIONS; 1725 break; 1726 1727 case O_IP_DSTPORT: 1728 show_prerequisites(&flags, HAVE_IP, 0); 1729 case O_IP_SRCPORT: 1730 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1731 if ((cmd->len & F_OR) && !or_block) 1732 printf(" {"); 1733 print_newports((ipfw_insn_u16 *)cmd, proto, 1734 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1735 break; 1736 1737 case O_PROTO: { 1738 struct protoent *pe = NULL; 1739 1740 if ((cmd->len & F_OR) && !or_block) 1741 printf(" {"); 1742 if (cmd->len & F_NOT) 1743 printf(" not"); 1744 proto = cmd->arg1; 1745 pe = getprotobynumber(cmd->arg1); 1746 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1747 !(flags & HAVE_PROTO)) 1748 show_prerequisites(&flags, 1749 HAVE_IP | HAVE_OPTIONS, 0); 1750 if (flags & HAVE_OPTIONS) 1751 printf(" proto"); 1752 if (pe) 1753 printf(" %s", pe->p_name); 1754 else 1755 printf(" %u", cmd->arg1); 1756 } 1757 flags |= HAVE_PROTO; 1758 break; 1759 1760 default: /*options ... */ 1761 if (!(cmd->len & (F_OR|F_NOT))) 1762 if (((cmd->opcode == O_IP6) && 1763 (flags & HAVE_PROTO6)) || 1764 ((cmd->opcode == O_IP4) && 1765 (flags & HAVE_PROTO4))) 1766 break; 1767 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1768 if ((cmd->len & F_OR) && !or_block) 1769 printf(" {"); 1770 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1771 printf(" not"); 1772 switch(cmd->opcode) { 1773 case O_FRAG: 1774 printf(" frag"); 1775 break; 1776 1777 case O_IN: 1778 printf(cmd->len & F_NOT ? " out" : " in"); 1779 break; 1780 1781 case O_DIVERTED: 1782 switch (cmd->arg1) { 1783 case 3: 1784 printf(" diverted"); 1785 break; 1786 case 1: 1787 printf(" diverted-loopback"); 1788 break; 1789 case 2: 1790 printf(" diverted-output"); 1791 break; 1792 default: 1793 printf(" diverted-?<%u>", cmd->arg1); 1794 break; 1795 } 1796 break; 1797 1798 case O_LAYER2: 1799 printf(" layer2"); 1800 break; 1801 case O_XMIT: 1802 case O_RECV: 1803 case O_VIA: 1804 { 1805 char const *s; 1806 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1807 1808 if (cmd->opcode == O_XMIT) 1809 s = "xmit"; 1810 else if (cmd->opcode == O_RECV) 1811 s = "recv"; 1812 else /* if (cmd->opcode == O_VIA) */ 1813 s = "via"; 1814 if (cmdif->name[0] == '\0') 1815 printf(" %s %s", s, 1816 inet_ntoa(cmdif->p.ip)); 1817 else 1818 printf(" %s %s", s, cmdif->name); 1819 1820 break; 1821 } 1822 case O_IPID: 1823 if (F_LEN(cmd) == 1) 1824 printf(" ipid %u", cmd->arg1 ); 1825 else 1826 print_newports((ipfw_insn_u16 *)cmd, 0, 1827 O_IPID); 1828 break; 1829 1830 case O_IPTTL: 1831 if (F_LEN(cmd) == 1) 1832 printf(" ipttl %u", cmd->arg1 ); 1833 else 1834 print_newports((ipfw_insn_u16 *)cmd, 0, 1835 O_IPTTL); 1836 break; 1837 1838 case O_IPVER: 1839 printf(" ipver %u", cmd->arg1 ); 1840 break; 1841 1842 case O_IPPRECEDENCE: 1843 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1844 break; 1845 1846 case O_IPLEN: 1847 if (F_LEN(cmd) == 1) 1848 printf(" iplen %u", cmd->arg1 ); 1849 else 1850 print_newports((ipfw_insn_u16 *)cmd, 0, 1851 O_IPLEN); 1852 break; 1853 1854 case O_IPOPT: 1855 print_flags("ipoptions", cmd, f_ipopts); 1856 break; 1857 1858 case O_IPTOS: 1859 print_flags("iptos", cmd, f_iptos); 1860 break; 1861 1862 case O_ICMPTYPE: 1863 print_icmptypes((ipfw_insn_u32 *)cmd); 1864 break; 1865 1866 case O_ESTAB: 1867 printf(" established"); 1868 break; 1869 1870 case O_TCPDATALEN: 1871 if (F_LEN(cmd) == 1) 1872 printf(" tcpdatalen %u", cmd->arg1 ); 1873 else 1874 print_newports((ipfw_insn_u16 *)cmd, 0, 1875 O_TCPDATALEN); 1876 break; 1877 1878 case O_TCPFLAGS: 1879 print_flags("tcpflags", cmd, f_tcpflags); 1880 break; 1881 1882 case O_TCPOPTS: 1883 print_flags("tcpoptions", cmd, f_tcpopts); 1884 break; 1885 1886 case O_TCPWIN: 1887 printf(" tcpwin %d", ntohs(cmd->arg1)); 1888 break; 1889 1890 case O_TCPACK: 1891 printf(" tcpack %d", ntohl(cmd32->d[0])); 1892 break; 1893 1894 case O_TCPSEQ: 1895 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1896 break; 1897 1898 case O_UID: 1899 { 1900 struct passwd *pwd = getpwuid(cmd32->d[0]); 1901 1902 if (pwd) 1903 printf(" uid %s", pwd->pw_name); 1904 else 1905 printf(" uid %u", cmd32->d[0]); 1906 } 1907 break; 1908 1909 case O_GID: 1910 { 1911 struct group *grp = getgrgid(cmd32->d[0]); 1912 1913 if (grp) 1914 printf(" gid %s", grp->gr_name); 1915 else 1916 printf(" gid %u", cmd32->d[0]); 1917 } 1918 break; 1919 1920 case O_JAIL: 1921 printf(" jail %d", cmd32->d[0]); 1922 break; 1923 1924 case O_VERREVPATH: 1925 printf(" verrevpath"); 1926 break; 1927 1928 case O_VERSRCREACH: 1929 printf(" versrcreach"); 1930 break; 1931 1932 case O_ANTISPOOF: 1933 printf(" antispoof"); 1934 break; 1935 1936 case O_IPSEC: 1937 printf(" ipsec"); 1938 break; 1939 1940 case O_NOP: 1941 comment = (char *)(cmd + 1); 1942 break; 1943 1944 case O_KEEP_STATE: 1945 printf(" keep-state"); 1946 break; 1947 1948 case O_LIMIT: { 1949 struct _s_x *p = limit_masks; 1950 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1951 uint8_t x = c->limit_mask; 1952 char const *comma = " "; 1953 1954 printf(" limit"); 1955 for (; p->x != 0 ; p++) 1956 if ((x & p->x) == p->x) { 1957 x &= ~p->x; 1958 printf("%s%s", comma, p->s); 1959 comma = ","; 1960 } 1961 PRINT_UINT_ARG(" ", c->conn_limit); 1962 break; 1963 } 1964 1965 case O_IP6: 1966 printf(" ip6"); 1967 break; 1968 1969 case O_IP4: 1970 printf(" ip4"); 1971 break; 1972 1973 case O_ICMP6TYPE: 1974 print_icmp6types((ipfw_insn_u32 *)cmd); 1975 break; 1976 1977 case O_EXT_HDR: 1978 print_ext6hdr( (ipfw_insn *) cmd ); 1979 break; 1980 1981 case O_TAGGED: 1982 if (F_LEN(cmd) == 1) 1983 PRINT_UINT_ARG(" tagged ", cmd->arg1); 1984 else 1985 print_newports((ipfw_insn_u16 *)cmd, 0, 1986 O_TAGGED); 1987 break; 1988 1989 default: 1990 printf(" [opcode %d len %d]", 1991 cmd->opcode, cmd->len); 1992 } 1993 } 1994 if (cmd->len & F_OR) { 1995 printf(" or"); 1996 or_block = 1; 1997 } else if (or_block) { 1998 printf(" }"); 1999 or_block = 0; 2000 } 2001 } 2002 show_prerequisites(&flags, HAVE_IP, 0); 2003 if (comment) 2004 printf(" // %s", comment); 2005 printf("\n"); 2006 } 2007 2008 static void 2009 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 2010 { 2011 struct protoent *pe; 2012 struct in_addr a; 2013 uint16_t rulenum; 2014 char buf[INET6_ADDRSTRLEN]; 2015 2016 if (!do_expired) { 2017 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2018 return; 2019 } 2020 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2021 printf("%05d", rulenum); 2022 if (pcwidth>0 || bcwidth>0) 2023 printf(" %*llu %*llu (%ds)", pcwidth, 2024 align_uint64(&d->pcnt), bcwidth, 2025 align_uint64(&d->bcnt), d->expire); 2026 switch (d->dyn_type) { 2027 case O_LIMIT_PARENT: 2028 printf(" PARENT %d", d->count); 2029 break; 2030 case O_LIMIT: 2031 printf(" LIMIT"); 2032 break; 2033 case O_KEEP_STATE: /* bidir, no mask */ 2034 printf(" STATE"); 2035 break; 2036 } 2037 2038 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2039 printf(" %s", pe->p_name); 2040 else 2041 printf(" proto %u", d->id.proto); 2042 2043 if (d->id.addr_type == 4) { 2044 a.s_addr = htonl(d->id.src_ip); 2045 printf(" %s %d", inet_ntoa(a), d->id.src_port); 2046 2047 a.s_addr = htonl(d->id.dst_ip); 2048 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 2049 } else if (d->id.addr_type == 6) { 2050 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2051 sizeof(buf)), d->id.src_port); 2052 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 2053 sizeof(buf)), d->id.dst_port); 2054 } else 2055 printf(" UNKNOWN <-> UNKNOWN\n"); 2056 2057 printf("\n"); 2058 } 2059 2060 static int 2061 sort_q(const void *pa, const void *pb) 2062 { 2063 int rev = (do_sort < 0); 2064 int field = rev ? -do_sort : do_sort; 2065 long long res = 0; 2066 const struct dn_flow_queue *a = pa; 2067 const struct dn_flow_queue *b = pb; 2068 2069 switch (field) { 2070 case 1: /* pkts */ 2071 res = a->len - b->len; 2072 break; 2073 case 2: /* bytes */ 2074 res = a->len_bytes - b->len_bytes; 2075 break; 2076 2077 case 3: /* tot pkts */ 2078 res = a->tot_pkts - b->tot_pkts; 2079 break; 2080 2081 case 4: /* tot bytes */ 2082 res = a->tot_bytes - b->tot_bytes; 2083 break; 2084 } 2085 if (res < 0) 2086 res = -1; 2087 if (res > 0) 2088 res = 1; 2089 return (int)(rev ? res : -res); 2090 } 2091 2092 static void 2093 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2094 { 2095 int l; 2096 int index_printed, indexes = 0; 2097 char buff[255]; 2098 struct protoent *pe; 2099 2100 if (fs->rq_elements == 0) 2101 return; 2102 2103 if (do_sort != 0) 2104 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2105 2106 /* Print IPv4 flows */ 2107 index_printed = 0; 2108 for (l = 0; l < fs->rq_elements; l++) { 2109 struct in_addr ina; 2110 2111 /* XXX: Should check for IPv4 flows */ 2112 if (IS_IP6_FLOW_ID(&(q[l].id))) 2113 continue; 2114 2115 if (!index_printed) { 2116 index_printed = 1; 2117 if (indexes > 0) /* currently a no-op */ 2118 printf("\n"); 2119 indexes++; 2120 printf(" " 2121 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2122 fs->flow_mask.proto, 2123 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2124 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2125 2126 printf("BKT Prot ___Source IP/port____ " 2127 "____Dest. IP/port____ " 2128 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2129 } 2130 2131 printf("%3d ", q[l].hash_slot); 2132 pe = getprotobynumber(q[l].id.proto); 2133 if (pe) 2134 printf("%-4s ", pe->p_name); 2135 else 2136 printf("%4u ", q[l].id.proto); 2137 ina.s_addr = htonl(q[l].id.src_ip); 2138 printf("%15s/%-5d ", 2139 inet_ntoa(ina), q[l].id.src_port); 2140 ina.s_addr = htonl(q[l].id.dst_ip); 2141 printf("%15s/%-5d ", 2142 inet_ntoa(ina), q[l].id.dst_port); 2143 printf("%4qu %8qu %2u %4u %3u\n", 2144 q[l].tot_pkts, q[l].tot_bytes, 2145 q[l].len, q[l].len_bytes, q[l].drops); 2146 if (verbose) 2147 printf(" S %20qd F %20qd\n", 2148 q[l].S, q[l].F); 2149 } 2150 2151 /* Print IPv6 flows */ 2152 index_printed = 0; 2153 for (l = 0; l < fs->rq_elements; l++) { 2154 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2155 continue; 2156 2157 if (!index_printed) { 2158 index_printed = 1; 2159 if (indexes > 0) 2160 printf("\n"); 2161 indexes++; 2162 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2163 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2164 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2165 buff, sizeof(buff)); 2166 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2167 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2168 buff, sizeof(buff) ); 2169 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2170 2171 printf("BKT ___Prot___ _flow-id_ " 2172 "______________Source IPv6/port_______________ " 2173 "_______________Dest. IPv6/port_______________ " 2174 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2175 } 2176 printf("%3d ", q[l].hash_slot); 2177 pe = getprotobynumber(q[l].id.proto); 2178 if (pe != NULL) 2179 printf("%9s ", pe->p_name); 2180 else 2181 printf("%9u ", q[l].id.proto); 2182 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2183 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2184 q[l].id.src_port); 2185 printf(" %39s/%-5d ", 2186 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2187 q[l].id.dst_port); 2188 printf(" %4qu %8qu %2u %4u %3u\n", 2189 q[l].tot_pkts, q[l].tot_bytes, 2190 q[l].len, q[l].len_bytes, q[l].drops); 2191 if (verbose) 2192 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2193 } 2194 } 2195 2196 static void 2197 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2198 { 2199 int l; 2200 char qs[30]; 2201 char plr[30]; 2202 char red[90]; /* Display RED parameters */ 2203 2204 l = fs->qsize; 2205 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2206 if (l >= 8192) 2207 sprintf(qs, "%d KB", l / 1024); 2208 else 2209 sprintf(qs, "%d B", l); 2210 } else 2211 sprintf(qs, "%3d sl.", l); 2212 if (fs->plr) 2213 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2214 else 2215 plr[0] = '\0'; 2216 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2217 sprintf(red, 2218 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2219 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2220 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2221 SCALE_VAL(fs->min_th), 2222 SCALE_VAL(fs->max_th), 2223 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2224 else 2225 sprintf(red, "droptail"); 2226 2227 printf("%s %s%s %d queues (%d buckets) %s\n", 2228 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2229 } 2230 2231 static void 2232 list_pipes(void *data, uint nbytes, int ac, char *av[]) 2233 { 2234 int rulenum; 2235 void *next = data; 2236 struct dn_pipe *p = (struct dn_pipe *) data; 2237 struct dn_flow_set *fs; 2238 struct dn_flow_queue *q; 2239 int l; 2240 2241 if (ac > 0) 2242 rulenum = strtoul(*av++, NULL, 10); 2243 else 2244 rulenum = 0; 2245 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2246 double b = p->bandwidth; 2247 char buf[30]; 2248 char prefix[80]; 2249 2250 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE) 2251 break; /* done with pipes, now queues */ 2252 2253 /* 2254 * compute length, as pipe have variable size 2255 */ 2256 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2257 next = (char *)p + l; 2258 nbytes -= l; 2259 2260 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2261 continue; 2262 2263 /* 2264 * Print rate (or clocking interface) 2265 */ 2266 if (p->if_name[0] != '\0') 2267 sprintf(buf, "%s", p->if_name); 2268 else if (b == 0) 2269 sprintf(buf, "unlimited"); 2270 else if (b >= 1000000) 2271 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2272 else if (b >= 1000) 2273 sprintf(buf, "%7.3f Kbit/s", b/1000); 2274 else 2275 sprintf(buf, "%7.3f bit/s ", b); 2276 2277 sprintf(prefix, "%05d: %s %4d ms ", 2278 p->pipe_nr, buf, p->delay); 2279 print_flowset_parms(&(p->fs), prefix); 2280 if (verbose) 2281 printf(" V %20qd\n", p->V >> MY_M); 2282 2283 q = (struct dn_flow_queue *)(p+1); 2284 list_queues(&(p->fs), q); 2285 } 2286 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2287 char prefix[80]; 2288 2289 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE) 2290 break; 2291 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2292 next = (char *)fs + l; 2293 nbytes -= l; 2294 2295 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2296 (rulenum != fs->parent_nr && do_pipe == 1))) { 2297 continue; 2298 } 2299 2300 q = (struct dn_flow_queue *)(fs+1); 2301 sprintf(prefix, "q%05d: weight %d pipe %d ", 2302 fs->fs_nr, fs->weight, fs->parent_nr); 2303 print_flowset_parms(fs, prefix); 2304 list_queues(fs, q); 2305 } 2306 } 2307 2308 /* 2309 * This one handles all set-related commands 2310 * ipfw set { show | enable | disable } 2311 * ipfw set swap X Y 2312 * ipfw set move X to Y 2313 * ipfw set move rule X to Y 2314 */ 2315 static void 2316 sets_handler(int ac, char *av[]) 2317 { 2318 uint32_t set_disable, masks[2]; 2319 int i, nbytes; 2320 uint16_t rulenum; 2321 uint8_t cmd, new_set; 2322 2323 ac--; 2324 av++; 2325 2326 if (!ac) 2327 errx(EX_USAGE, "set needs command"); 2328 if (_substrcmp(*av, "show") == 0) { 2329 void *data; 2330 char const *msg; 2331 2332 nbytes = sizeof(struct ip_fw); 2333 if ((data = calloc(1, nbytes)) == NULL) 2334 err(EX_OSERR, "calloc"); 2335 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2336 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2337 bcopy(&((struct ip_fw *)data)->next_rule, 2338 &set_disable, sizeof(set_disable)); 2339 2340 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2341 if ((set_disable & (1<<i))) { 2342 printf("%s %d", msg, i); 2343 msg = ""; 2344 } 2345 msg = (set_disable) ? " enable" : "enable"; 2346 for (i = 0; i < RESVD_SET; i++) 2347 if (!(set_disable & (1<<i))) { 2348 printf("%s %d", msg, i); 2349 msg = ""; 2350 } 2351 printf("\n"); 2352 } else if (_substrcmp(*av, "swap") == 0) { 2353 ac--; av++; 2354 if (ac != 2) 2355 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2356 rulenum = atoi(av[0]); 2357 new_set = atoi(av[1]); 2358 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2359 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2360 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2361 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2362 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2363 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2364 } else if (_substrcmp(*av, "move") == 0) { 2365 ac--; av++; 2366 if (ac && _substrcmp(*av, "rule") == 0) { 2367 cmd = 2; 2368 ac--; av++; 2369 } else 2370 cmd = 3; 2371 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2372 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2373 rulenum = atoi(av[0]); 2374 new_set = atoi(av[2]); 2375 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2376 (cmd == 2 && rulenum == 65535) ) 2377 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2378 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2379 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2380 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2381 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2382 } else if (_substrcmp(*av, "disable") == 0 || 2383 _substrcmp(*av, "enable") == 0 ) { 2384 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2385 2386 ac--; av++; 2387 masks[0] = masks[1] = 0; 2388 2389 while (ac) { 2390 if (isdigit(**av)) { 2391 i = atoi(*av); 2392 if (i < 0 || i > RESVD_SET) 2393 errx(EX_DATAERR, 2394 "invalid set number %d\n", i); 2395 masks[which] |= (1<<i); 2396 } else if (_substrcmp(*av, "disable") == 0) 2397 which = 0; 2398 else if (_substrcmp(*av, "enable") == 0) 2399 which = 1; 2400 else 2401 errx(EX_DATAERR, 2402 "invalid set command %s\n", *av); 2403 av++; ac--; 2404 } 2405 if ( (masks[0] & masks[1]) != 0 ) 2406 errx(EX_DATAERR, 2407 "cannot enable and disable the same set\n"); 2408 2409 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2410 if (i) 2411 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2412 } else 2413 errx(EX_USAGE, "invalid set command %s\n", *av); 2414 } 2415 2416 static void 2417 sysctl_handler(int ac, char *av[], int which) 2418 { 2419 ac--; 2420 av++; 2421 2422 if (ac == 0) { 2423 warnx("missing keyword to enable/disable\n"); 2424 } else if (_substrcmp(*av, "firewall") == 0) { 2425 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2426 &which, sizeof(which)); 2427 } else if (_substrcmp(*av, "one_pass") == 0) { 2428 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2429 &which, sizeof(which)); 2430 } else if (_substrcmp(*av, "debug") == 0) { 2431 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2432 &which, sizeof(which)); 2433 } else if (_substrcmp(*av, "verbose") == 0) { 2434 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2435 &which, sizeof(which)); 2436 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2437 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2438 &which, sizeof(which)); 2439 } else if (_substrcmp(*av, "altq") == 0) { 2440 altq_set_enabled(which); 2441 } else { 2442 warnx("unrecognize enable/disable keyword: %s\n", *av); 2443 } 2444 } 2445 2446 static void 2447 list(int ac, char *av[], int show_counters) 2448 { 2449 struct ip_fw *r; 2450 ipfw_dyn_rule *dynrules, *d; 2451 2452 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2453 char *lim; 2454 void *data = NULL; 2455 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2456 int exitval = EX_OK; 2457 int lac; 2458 char **lav; 2459 u_long rnum, last; 2460 char *endptr; 2461 int seen = 0; 2462 2463 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2464 int nalloc = 1024; /* start somewhere... */ 2465 2466 last = 0; 2467 2468 if (test_only) { 2469 fprintf(stderr, "Testing only, list disabled\n"); 2470 return; 2471 } 2472 2473 ac--; 2474 av++; 2475 2476 /* get rules or pipes from kernel, resizing array as necessary */ 2477 nbytes = nalloc; 2478 2479 while (nbytes >= nalloc) { 2480 nalloc = nalloc * 2 + 200; 2481 nbytes = nalloc; 2482 if ((data = realloc(data, nbytes)) == NULL) 2483 err(EX_OSERR, "realloc"); 2484 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2485 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2486 do_pipe ? "DUMMYNET" : "FW"); 2487 } 2488 2489 if (do_pipe) { 2490 list_pipes(data, nbytes, ac, av); 2491 goto done; 2492 } 2493 2494 /* 2495 * Count static rules. They have variable size so we 2496 * need to scan the list to count them. 2497 */ 2498 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2499 r->rulenum < 65535 && (char *)r < lim; 2500 ++nstat, r = NEXT(r) ) 2501 ; /* nothing */ 2502 2503 /* 2504 * Count dynamic rules. This is easier as they have 2505 * fixed size. 2506 */ 2507 r = NEXT(r); 2508 dynrules = (ipfw_dyn_rule *)r ; 2509 n = (char *)r - (char *)data; 2510 ndyn = (nbytes - n) / sizeof *dynrules; 2511 2512 /* if showing stats, figure out column widths ahead of time */ 2513 bcwidth = pcwidth = 0; 2514 if (show_counters) { 2515 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2516 /* packet counter */ 2517 width = snprintf(NULL, 0, "%llu", 2518 align_uint64(&r->pcnt)); 2519 if (width > pcwidth) 2520 pcwidth = width; 2521 2522 /* byte counter */ 2523 width = snprintf(NULL, 0, "%llu", 2524 align_uint64(&r->bcnt)); 2525 if (width > bcwidth) 2526 bcwidth = width; 2527 } 2528 } 2529 if (do_dynamic && ndyn) { 2530 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2531 width = snprintf(NULL, 0, "%llu", 2532 align_uint64(&d->pcnt)); 2533 if (width > pcwidth) 2534 pcwidth = width; 2535 2536 width = snprintf(NULL, 0, "%llu", 2537 align_uint64(&d->bcnt)); 2538 if (width > bcwidth) 2539 bcwidth = width; 2540 } 2541 } 2542 /* if no rule numbers were specified, list all rules */ 2543 if (ac == 0) { 2544 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2545 show_ipfw(r, pcwidth, bcwidth); 2546 2547 if (do_dynamic && ndyn) { 2548 printf("## Dynamic rules (%d):\n", ndyn); 2549 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2550 show_dyn_ipfw(d, pcwidth, bcwidth); 2551 } 2552 goto done; 2553 } 2554 2555 /* display specific rules requested on command line */ 2556 2557 for (lac = ac, lav = av; lac != 0; lac--) { 2558 /* convert command line rule # */ 2559 last = rnum = strtoul(*lav++, &endptr, 10); 2560 if (*endptr == '-') 2561 last = strtoul(endptr+1, &endptr, 10); 2562 if (*endptr) { 2563 exitval = EX_USAGE; 2564 warnx("invalid rule number: %s", *(lav - 1)); 2565 continue; 2566 } 2567 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2568 if (r->rulenum > last) 2569 break; 2570 if (r->rulenum >= rnum && r->rulenum <= last) { 2571 show_ipfw(r, pcwidth, bcwidth); 2572 seen = 1; 2573 } 2574 } 2575 if (!seen) { 2576 /* give precedence to other error(s) */ 2577 if (exitval == EX_OK) 2578 exitval = EX_UNAVAILABLE; 2579 warnx("rule %lu does not exist", rnum); 2580 } 2581 } 2582 2583 if (do_dynamic && ndyn) { 2584 printf("## Dynamic rules:\n"); 2585 for (lac = ac, lav = av; lac != 0; lac--) { 2586 last = rnum = strtoul(*lav++, &endptr, 10); 2587 if (*endptr == '-') 2588 last = strtoul(endptr+1, &endptr, 10); 2589 if (*endptr) 2590 /* already warned */ 2591 continue; 2592 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2593 uint16_t rulenum; 2594 2595 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2596 if (rulenum > rnum) 2597 break; 2598 if (r->rulenum >= rnum && r->rulenum <= last) 2599 show_dyn_ipfw(d, pcwidth, bcwidth); 2600 } 2601 } 2602 } 2603 2604 ac = 0; 2605 2606 done: 2607 free(data); 2608 2609 if (exitval != EX_OK) 2610 exit(exitval); 2611 #undef NEXT 2612 } 2613 2614 static void 2615 show_usage(void) 2616 { 2617 fprintf(stderr, "usage: ipfw [options]\n" 2618 "do \"ipfw -h\" or see ipfw manpage for details\n" 2619 ); 2620 exit(EX_USAGE); 2621 } 2622 2623 static void 2624 help(void) 2625 { 2626 fprintf(stderr, 2627 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2628 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2629 "add [num] [set N] [prob x] RULE-BODY\n" 2630 "{pipe|queue} N config PIPE-BODY\n" 2631 "[pipe|queue] {zero|delete|show} [N{,N}]\n" 2632 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2633 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2634 "\n" 2635 "RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2636 "ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 2637 " skipto N | {divert|tee} PORT | forward ADDR |\n" 2638 " pipe N | queue N\n" 2639 "PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2640 "ADDR: [ MAC dst src ether_type ] \n" 2641 " [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2642 " [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2643 "IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2644 "IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2645 "IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2646 "IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2647 "OPTION_LIST: OPTION [OPTION_LIST]\n" 2648 "OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2649 " {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2650 " {dst-port|src-port} LIST |\n" 2651 " estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2652 " iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2653 " ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2654 " icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n" 2655 " mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2656 " setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2657 " tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2658 ); 2659 exit(0); 2660 } 2661 2662 2663 static int 2664 lookup_host (char *host, struct in_addr *ipaddr) 2665 { 2666 struct hostent *he; 2667 2668 if (!inet_aton(host, ipaddr)) { 2669 if ((he = gethostbyname(host)) == NULL) 2670 return(-1); 2671 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2672 } 2673 return(0); 2674 } 2675 2676 /* 2677 * fills the addr and mask fields in the instruction as appropriate from av. 2678 * Update length as appropriate. 2679 * The following formats are allowed: 2680 * me returns O_IP_*_ME 2681 * 1.2.3.4 single IP address 2682 * 1.2.3.4:5.6.7.8 address:mask 2683 * 1.2.3.4/24 address/mask 2684 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2685 * We can have multiple comma-separated address/mask entries. 2686 */ 2687 static void 2688 fill_ip(ipfw_insn_ip *cmd, char *av) 2689 { 2690 int len = 0; 2691 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2692 2693 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2694 2695 if (_substrcmp(av, "any") == 0) 2696 return; 2697 2698 if (_substrcmp(av, "me") == 0) { 2699 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2700 return; 2701 } 2702 2703 if (strncmp(av, "table(", 6) == 0) { 2704 char *p = strchr(av + 6, ','); 2705 2706 if (p) 2707 *p++ = '\0'; 2708 cmd->o.opcode = O_IP_DST_LOOKUP; 2709 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2710 if (p) { 2711 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2712 d[0] = strtoul(p, NULL, 0); 2713 } else 2714 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2715 return; 2716 } 2717 2718 while (av) { 2719 /* 2720 * After the address we can have '/' or ':' indicating a mask, 2721 * ',' indicating another address follows, '{' indicating a 2722 * set of addresses of unspecified size. 2723 */ 2724 char *p = strpbrk(av, "/:,{"); 2725 int masklen; 2726 char md; 2727 2728 if (p) { 2729 md = *p; 2730 *p++ = '\0'; 2731 } else 2732 md = '\0'; 2733 2734 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2735 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2736 switch (md) { 2737 case ':': 2738 if (!inet_aton(p, (struct in_addr *)&d[1])) 2739 errx(EX_DATAERR, "bad netmask ``%s''", p); 2740 break; 2741 case '/': 2742 masklen = atoi(p); 2743 if (masklen == 0) 2744 d[1] = htonl(0); /* mask */ 2745 else if (masklen > 32) 2746 errx(EX_DATAERR, "bad width ``%s''", p); 2747 else 2748 d[1] = htonl(~0 << (32 - masklen)); 2749 break; 2750 case '{': /* no mask, assume /24 and put back the '{' */ 2751 d[1] = htonl(~0 << (32 - 24)); 2752 *(--p) = md; 2753 break; 2754 2755 case ',': /* single address plus continuation */ 2756 *(--p) = md; 2757 /* FALLTHROUGH */ 2758 case 0: /* initialization value */ 2759 default: 2760 d[1] = htonl(~0); /* force /32 */ 2761 break; 2762 } 2763 d[0] &= d[1]; /* mask base address with mask */ 2764 /* find next separator */ 2765 if (p) 2766 p = strpbrk(p, ",{"); 2767 if (p && *p == '{') { 2768 /* 2769 * We have a set of addresses. They are stored as follows: 2770 * arg1 is the set size (powers of 2, 2..256) 2771 * addr is the base address IN HOST FORMAT 2772 * mask.. is an array of arg1 bits (rounded up to 2773 * the next multiple of 32) with bits set 2774 * for each host in the map. 2775 */ 2776 uint32_t *map = (uint32_t *)&cmd->mask; 2777 int low, high; 2778 int i = contigmask((uint8_t *)&(d[1]), 32); 2779 2780 if (len > 0) 2781 errx(EX_DATAERR, "address set cannot be in a list"); 2782 if (i < 24 || i > 31) 2783 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2784 cmd->o.arg1 = 1<<(32-i); /* map length */ 2785 d[0] = ntohl(d[0]); /* base addr in host format */ 2786 cmd->o.opcode = O_IP_DST_SET; /* default */ 2787 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2788 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2789 map[i] = 0; /* clear map */ 2790 2791 av = p + 1; 2792 low = d[0] & 0xff; 2793 high = low + cmd->o.arg1 - 1; 2794 /* 2795 * Here, i stores the previous value when we specify a range 2796 * of addresses within a mask, e.g. 45-63. i = -1 means we 2797 * have no previous value. 2798 */ 2799 i = -1; /* previous value in a range */ 2800 while (isdigit(*av)) { 2801 char *s; 2802 int a = strtol(av, &s, 0); 2803 2804 if (s == av) { /* no parameter */ 2805 if (*av != '}') 2806 errx(EX_DATAERR, "set not closed\n"); 2807 if (i != -1) 2808 errx(EX_DATAERR, "incomplete range %d-", i); 2809 break; 2810 } 2811 if (a < low || a > high) 2812 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2813 a, low, high); 2814 a -= low; 2815 if (i == -1) /* no previous in range */ 2816 i = a; 2817 else { /* check that range is valid */ 2818 if (i > a) 2819 errx(EX_DATAERR, "invalid range %d-%d", 2820 i+low, a+low); 2821 if (*s == '-') 2822 errx(EX_DATAERR, "double '-' in range"); 2823 } 2824 for (; i <= a; i++) 2825 map[i/32] |= 1<<(i & 31); 2826 i = -1; 2827 if (*s == '-') 2828 i = a; 2829 else if (*s == '}') 2830 break; 2831 av = s+1; 2832 } 2833 return; 2834 } 2835 av = p; 2836 if (av) /* then *av must be a ',' */ 2837 av++; 2838 2839 /* Check this entry */ 2840 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2841 /* 2842 * 'any' turns the entire list into a NOP. 2843 * 'not any' never matches, so it is removed from the 2844 * list unless it is the only item, in which case we 2845 * report an error. 2846 */ 2847 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2848 if (av == NULL && len == 0) /* only this entry */ 2849 errx(EX_DATAERR, "not any never matches"); 2850 } 2851 /* else do nothing and skip this entry */ 2852 return; 2853 } 2854 /* A single IP can be stored in an optimized format */ 2855 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2856 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2857 return; 2858 } 2859 len += 2; /* two words... */ 2860 d += 2; 2861 } /* end while */ 2862 if (len + 1 > F_LEN_MASK) 2863 errx(EX_DATAERR, "address list too long"); 2864 cmd->o.len |= len+1; 2865 } 2866 2867 2868 /* Try to find ipv6 address by hostname */ 2869 static int 2870 lookup_host6 (char *host, struct in6_addr *ip6addr) 2871 { 2872 struct hostent *he; 2873 2874 if (!inet_pton(AF_INET6, host, ip6addr)) { 2875 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2876 return(-1); 2877 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2878 } 2879 return(0); 2880 } 2881 2882 2883 /* n2mask sets n bits of the mask */ 2884 static void 2885 n2mask(struct in6_addr *mask, int n) 2886 { 2887 static int minimask[9] = 2888 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2889 u_char *p; 2890 2891 memset(mask, 0, sizeof(struct in6_addr)); 2892 p = (u_char *) mask; 2893 for (; n > 0; p++, n -= 8) { 2894 if (n >= 8) 2895 *p = 0xff; 2896 else 2897 *p = minimask[n]; 2898 } 2899 return; 2900 } 2901 2902 2903 /* 2904 * fill the addr and mask fields in the instruction as appropriate from av. 2905 * Update length as appropriate. 2906 * The following formats are allowed: 2907 * any matches any IP6. Actually returns an empty instruction. 2908 * me returns O_IP6_*_ME 2909 * 2910 * 03f1::234:123:0342 single IP6 addres 2911 * 03f1::234:123:0342/24 address/mask 2912 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2913 * 2914 * Set of address (as in ipv6) not supported because ipv6 address 2915 * are typically random past the initial prefix. 2916 * Return 1 on success, 0 on failure. 2917 */ 2918 static int 2919 fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2920 { 2921 int len = 0; 2922 struct in6_addr *d = &(cmd->addr6); 2923 /* 2924 * Needed for multiple address. 2925 * Note d[1] points to struct in6_add r mask6 of cmd 2926 */ 2927 2928 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2929 2930 if (strcmp(av, "any") == 0) 2931 return (1); 2932 2933 2934 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2935 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2936 return (1); 2937 } 2938 2939 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2940 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2941 return (1); 2942 } 2943 2944 av = strdup(av); 2945 while (av) { 2946 /* 2947 * After the address we can have '/' indicating a mask, 2948 * or ',' indicating another address follows. 2949 */ 2950 2951 char *p; 2952 int masklen; 2953 char md = '\0'; 2954 2955 if ((p = strpbrk(av, "/,")) ) { 2956 md = *p; /* save the separator */ 2957 *p = '\0'; /* terminate address string */ 2958 p++; /* and skip past it */ 2959 } 2960 /* now p points to NULL, mask or next entry */ 2961 2962 /* lookup stores address in *d as a side effect */ 2963 if (lookup_host6(av, d) != 0) { 2964 /* XXX: failed. Free memory and go */ 2965 errx(EX_DATAERR, "bad address \"%s\"", av); 2966 } 2967 /* next, look at the mask, if any */ 2968 masklen = (md == '/') ? atoi(p) : 128; 2969 if (masklen > 128 || masklen < 0) 2970 errx(EX_DATAERR, "bad width \"%s\''", p); 2971 else 2972 n2mask(&d[1], masklen); 2973 2974 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2975 2976 /* find next separator */ 2977 2978 if (md == '/') { /* find separator past the mask */ 2979 p = strpbrk(p, ","); 2980 if (p != NULL) 2981 p++; 2982 } 2983 av = p; 2984 2985 /* Check this entry */ 2986 if (masklen == 0) { 2987 /* 2988 * 'any' turns the entire list into a NOP. 2989 * 'not any' never matches, so it is removed from the 2990 * list unless it is the only item, in which case we 2991 * report an error. 2992 */ 2993 if (cmd->o.len & F_NOT && av == NULL && len == 0) 2994 errx(EX_DATAERR, "not any never matches"); 2995 continue; 2996 } 2997 2998 /* 2999 * A single IP can be stored alone 3000 */ 3001 if (masklen == 128 && av == NULL && len == 0) { 3002 len = F_INSN_SIZE(struct in6_addr); 3003 break; 3004 } 3005 3006 /* Update length and pointer to arguments */ 3007 len += F_INSN_SIZE(struct in6_addr)*2; 3008 d += 2; 3009 } /* end while */ 3010 3011 /* 3012 * Total length of the command, remember that 1 is the size of 3013 * the base command. 3014 */ 3015 if (len + 1 > F_LEN_MASK) 3016 errx(EX_DATAERR, "address list too long"); 3017 cmd->o.len |= len+1; 3018 free(av); 3019 return (1); 3020 } 3021 3022 /* 3023 * fills command for ipv6 flow-id filtering 3024 * note that the 20 bit flow number is stored in a array of u_int32_t 3025 * it's supported lists of flow-id, so in the o.arg1 we store how many 3026 * additional flow-id we want to filter, the basic is 1 3027 */ 3028 void 3029 fill_flow6( ipfw_insn_u32 *cmd, char *av ) 3030 { 3031 u_int32_t type; /* Current flow number */ 3032 u_int16_t nflow = 0; /* Current flow index */ 3033 char *s = av; 3034 cmd->d[0] = 0; /* Initializing the base number*/ 3035 3036 while (s) { 3037 av = strsep( &s, ",") ; 3038 type = strtoul(av, &av, 0); 3039 if (*av != ',' && *av != '\0') 3040 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3041 if (type > 0xfffff) 3042 errx(EX_DATAERR, "flow number out of range %s", av); 3043 cmd->d[nflow] |= type; 3044 nflow++; 3045 } 3046 if( nflow > 0 ) { 3047 cmd->o.opcode = O_FLOW6ID; 3048 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 3049 cmd->o.arg1 = nflow; 3050 } 3051 else { 3052 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3053 } 3054 } 3055 3056 static ipfw_insn * 3057 add_srcip6(ipfw_insn *cmd, char *av) 3058 { 3059 3060 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3061 if (F_LEN(cmd) == 0) /* any */ 3062 ; 3063 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3064 cmd->opcode = O_IP6_SRC_ME; 3065 } else if (F_LEN(cmd) == 3066 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3067 /* single IP, no mask*/ 3068 cmd->opcode = O_IP6_SRC; 3069 } else { /* addr/mask opt */ 3070 cmd->opcode = O_IP6_SRC_MASK; 3071 } 3072 return cmd; 3073 } 3074 3075 static ipfw_insn * 3076 add_dstip6(ipfw_insn *cmd, char *av) 3077 { 3078 3079 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3080 if (F_LEN(cmd) == 0) /* any */ 3081 ; 3082 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3083 cmd->opcode = O_IP6_DST_ME; 3084 } else if (F_LEN(cmd) == 3085 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3086 /* single IP, no mask*/ 3087 cmd->opcode = O_IP6_DST; 3088 } else { /* addr/mask opt */ 3089 cmd->opcode = O_IP6_DST_MASK; 3090 } 3091 return cmd; 3092 } 3093 3094 3095 /* 3096 * helper function to process a set of flags and set bits in the 3097 * appropriate masks. 3098 */ 3099 static void 3100 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3101 struct _s_x *flags, char *p) 3102 { 3103 uint8_t set=0, clear=0; 3104 3105 while (p && *p) { 3106 char *q; /* points to the separator */ 3107 int val; 3108 uint8_t *which; /* mask we are working on */ 3109 3110 if (*p == '!') { 3111 p++; 3112 which = &clear; 3113 } else 3114 which = &set; 3115 q = strchr(p, ','); 3116 if (q) 3117 *q++ = '\0'; 3118 val = match_token(flags, p); 3119 if (val <= 0) 3120 errx(EX_DATAERR, "invalid flag %s", p); 3121 *which |= (uint8_t)val; 3122 p = q; 3123 } 3124 cmd->opcode = opcode; 3125 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3126 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3127 } 3128 3129 3130 static void 3131 delete(int ac, char *av[]) 3132 { 3133 uint32_t rulenum; 3134 struct dn_pipe p; 3135 int i; 3136 int exitval = EX_OK; 3137 int do_set = 0; 3138 3139 memset(&p, 0, sizeof p); 3140 3141 av++; ac--; 3142 NEED1("missing rule specification"); 3143 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3144 do_set = 1; /* delete set */ 3145 ac--; av++; 3146 } 3147 3148 /* Rule number */ 3149 while (ac && isdigit(**av)) { 3150 i = atoi(*av); av++; ac--; 3151 if (do_pipe) { 3152 if (do_pipe == 1) 3153 p.pipe_nr = i; 3154 else 3155 p.fs.fs_nr = i; 3156 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3157 if (i) { 3158 exitval = 1; 3159 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3160 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3161 } 3162 } else { 3163 rulenum = (i & 0xffff) | (do_set << 24); 3164 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3165 if (i) { 3166 exitval = EX_UNAVAILABLE; 3167 warn("rule %u: setsockopt(IP_FW_DEL)", 3168 rulenum); 3169 } 3170 } 3171 } 3172 if (exitval != EX_OK) 3173 exit(exitval); 3174 } 3175 3176 3177 /* 3178 * fill the interface structure. We do not check the name as we can 3179 * create interfaces dynamically, so checking them at insert time 3180 * makes relatively little sense. 3181 * Interface names containing '*', '?', or '[' are assumed to be shell 3182 * patterns which match interfaces. 3183 */ 3184 static void 3185 fill_iface(ipfw_insn_if *cmd, char *arg) 3186 { 3187 cmd->name[0] = '\0'; 3188 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3189 3190 /* Parse the interface or address */ 3191 if (strcmp(arg, "any") == 0) 3192 cmd->o.len = 0; /* effectively ignore this command */ 3193 else if (!isdigit(*arg)) { 3194 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3195 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3196 } else if (!inet_aton(arg, &cmd->p.ip)) 3197 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3198 } 3199 3200 static void 3201 config_pipe(int ac, char **av) 3202 { 3203 struct dn_pipe p; 3204 int i; 3205 char *end; 3206 void *par = NULL; 3207 3208 memset(&p, 0, sizeof p); 3209 3210 av++; ac--; 3211 /* Pipe number */ 3212 if (ac && isdigit(**av)) { 3213 i = atoi(*av); av++; ac--; 3214 if (do_pipe == 1) 3215 p.pipe_nr = i; 3216 else 3217 p.fs.fs_nr = i; 3218 } 3219 while (ac > 0) { 3220 double d; 3221 int tok = match_token(dummynet_params, *av); 3222 ac--; av++; 3223 3224 switch(tok) { 3225 case TOK_NOERROR: 3226 p.fs.flags_fs |= DN_NOERROR; 3227 break; 3228 3229 case TOK_PLR: 3230 NEED1("plr needs argument 0..1\n"); 3231 d = strtod(av[0], NULL); 3232 if (d > 1) 3233 d = 1; 3234 else if (d < 0) 3235 d = 0; 3236 p.fs.plr = (int)(d*0x7fffffff); 3237 ac--; av++; 3238 break; 3239 3240 case TOK_QUEUE: 3241 NEED1("queue needs queue size\n"); 3242 end = NULL; 3243 p.fs.qsize = strtoul(av[0], &end, 0); 3244 if (*end == 'K' || *end == 'k') { 3245 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3246 p.fs.qsize *= 1024; 3247 } else if (*end == 'B' || 3248 _substrcmp2(end, "by", "bytes") == 0) { 3249 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3250 } 3251 ac--; av++; 3252 break; 3253 3254 case TOK_BUCKETS: 3255 NEED1("buckets needs argument\n"); 3256 p.fs.rq_size = strtoul(av[0], NULL, 0); 3257 ac--; av++; 3258 break; 3259 3260 case TOK_MASK: 3261 NEED1("mask needs mask specifier\n"); 3262 /* 3263 * per-flow queue, mask is dst_ip, dst_port, 3264 * src_ip, src_port, proto measured in bits 3265 */ 3266 par = NULL; 3267 3268 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 3269 end = NULL; 3270 3271 while (ac >= 1) { 3272 uint32_t *p32 = NULL; 3273 uint16_t *p16 = NULL; 3274 uint32_t *p20 = NULL; 3275 struct in6_addr *pa6 = NULL; 3276 uint32_t a; 3277 3278 tok = match_token(dummynet_params, *av); 3279 ac--; av++; 3280 switch(tok) { 3281 case TOK_ALL: 3282 /* 3283 * special case, all bits significant 3284 */ 3285 p.fs.flow_mask.dst_ip = ~0; 3286 p.fs.flow_mask.src_ip = ~0; 3287 p.fs.flow_mask.dst_port = ~0; 3288 p.fs.flow_mask.src_port = ~0; 3289 p.fs.flow_mask.proto = ~0; 3290 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 3291 n2mask(&(p.fs.flow_mask.src_ip6), 128); 3292 p.fs.flow_mask.flow_id6 = ~0; 3293 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3294 goto end_mask; 3295 3296 case TOK_DSTIP: 3297 p32 = &p.fs.flow_mask.dst_ip; 3298 break; 3299 3300 case TOK_SRCIP: 3301 p32 = &p.fs.flow_mask.src_ip; 3302 break; 3303 3304 case TOK_DSTIP6: 3305 pa6 = &(p.fs.flow_mask.dst_ip6); 3306 break; 3307 3308 case TOK_SRCIP6: 3309 pa6 = &(p.fs.flow_mask.src_ip6); 3310 break; 3311 3312 case TOK_FLOWID: 3313 p20 = &p.fs.flow_mask.flow_id6; 3314 break; 3315 3316 case TOK_DSTPORT: 3317 p16 = &p.fs.flow_mask.dst_port; 3318 break; 3319 3320 case TOK_SRCPORT: 3321 p16 = &p.fs.flow_mask.src_port; 3322 break; 3323 3324 case TOK_PROTO: 3325 break; 3326 3327 default: 3328 ac++; av--; /* backtrack */ 3329 goto end_mask; 3330 } 3331 if (ac < 1) 3332 errx(EX_USAGE, "mask: value missing"); 3333 if (*av[0] == '/') { 3334 a = strtoul(av[0]+1, &end, 0); 3335 if (pa6 == NULL) 3336 a = (a == 32) ? ~0 : (1 << a) - 1; 3337 } else 3338 a = strtoul(av[0], &end, 0); 3339 if (p32 != NULL) 3340 *p32 = a; 3341 else if (p16 != NULL) { 3342 if (a > 0xFFFF) 3343 errx(EX_DATAERR, 3344 "port mask must be 16 bit"); 3345 *p16 = (uint16_t)a; 3346 } else if (p20 != NULL) { 3347 if (a > 0xfffff) 3348 errx(EX_DATAERR, 3349 "flow_id mask must be 20 bit"); 3350 *p20 = (uint32_t)a; 3351 } else if (pa6 != NULL) { 3352 if (a < 0 || a > 128) 3353 errx(EX_DATAERR, 3354 "in6addr invalid mask len"); 3355 else 3356 n2mask(pa6, a); 3357 } else { 3358 if (a > 0xFF) 3359 errx(EX_DATAERR, 3360 "proto mask must be 8 bit"); 3361 p.fs.flow_mask.proto = (uint8_t)a; 3362 } 3363 if (a != 0) 3364 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3365 ac--; av++; 3366 } /* end while, config masks */ 3367 end_mask: 3368 break; 3369 3370 case TOK_RED: 3371 case TOK_GRED: 3372 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 3373 p.fs.flags_fs |= DN_IS_RED; 3374 if (tok == TOK_GRED) 3375 p.fs.flags_fs |= DN_IS_GENTLE_RED; 3376 /* 3377 * the format for parameters is w_q/min_th/max_th/max_p 3378 */ 3379 if ((end = strsep(&av[0], "/"))) { 3380 double w_q = strtod(end, NULL); 3381 if (w_q > 1 || w_q <= 0) 3382 errx(EX_DATAERR, "0 < w_q <= 1"); 3383 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 3384 } 3385 if ((end = strsep(&av[0], "/"))) { 3386 p.fs.min_th = strtoul(end, &end, 0); 3387 if (*end == 'K' || *end == 'k') 3388 p.fs.min_th *= 1024; 3389 } 3390 if ((end = strsep(&av[0], "/"))) { 3391 p.fs.max_th = strtoul(end, &end, 0); 3392 if (*end == 'K' || *end == 'k') 3393 p.fs.max_th *= 1024; 3394 } 3395 if ((end = strsep(&av[0], "/"))) { 3396 double max_p = strtod(end, NULL); 3397 if (max_p > 1 || max_p <= 0) 3398 errx(EX_DATAERR, "0 < max_p <= 1"); 3399 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 3400 } 3401 ac--; av++; 3402 break; 3403 3404 case TOK_DROPTAIL: 3405 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 3406 break; 3407 3408 case TOK_BW: 3409 NEED1("bw needs bandwidth or interface\n"); 3410 if (do_pipe != 1) 3411 errx(EX_DATAERR, "bandwidth only valid for pipes"); 3412 /* 3413 * set clocking interface or bandwidth value 3414 */ 3415 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 3416 int l = sizeof(p.if_name)-1; 3417 /* interface name */ 3418 strncpy(p.if_name, av[0], l); 3419 p.if_name[l] = '\0'; 3420 p.bandwidth = 0; 3421 } else { 3422 p.if_name[0] = '\0'; 3423 p.bandwidth = strtoul(av[0], &end, 0); 3424 if (*end == 'K' || *end == 'k') { 3425 end++; 3426 p.bandwidth *= 1000; 3427 } else if (*end == 'M') { 3428 end++; 3429 p.bandwidth *= 1000000; 3430 } 3431 if ((*end == 'B' && 3432 _substrcmp2(end, "Bi", "Bit/s") != 0) || 3433 _substrcmp2(end, "by", "bytes") == 0) 3434 p.bandwidth *= 8; 3435 if (p.bandwidth < 0) 3436 errx(EX_DATAERR, "bandwidth too large"); 3437 } 3438 ac--; av++; 3439 break; 3440 3441 case TOK_DELAY: 3442 if (do_pipe != 1) 3443 errx(EX_DATAERR, "delay only valid for pipes"); 3444 NEED1("delay needs argument 0..10000ms\n"); 3445 p.delay = strtoul(av[0], NULL, 0); 3446 ac--; av++; 3447 break; 3448 3449 case TOK_WEIGHT: 3450 if (do_pipe == 1) 3451 errx(EX_DATAERR,"weight only valid for queues"); 3452 NEED1("weight needs argument 0..100\n"); 3453 p.fs.weight = strtoul(av[0], &end, 0); 3454 ac--; av++; 3455 break; 3456 3457 case TOK_PIPE: 3458 if (do_pipe == 1) 3459 errx(EX_DATAERR,"pipe only valid for queues"); 3460 NEED1("pipe needs pipe_number\n"); 3461 p.fs.parent_nr = strtoul(av[0], &end, 0); 3462 ac--; av++; 3463 break; 3464 3465 default: 3466 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3467 } 3468 } 3469 if (do_pipe == 1) { 3470 if (p.pipe_nr == 0) 3471 errx(EX_DATAERR, "pipe_nr must be > 0"); 3472 if (p.delay > 10000) 3473 errx(EX_DATAERR, "delay must be < 10000"); 3474 } else { /* do_pipe == 2, queue */ 3475 if (p.fs.parent_nr == 0) 3476 errx(EX_DATAERR, "pipe must be > 0"); 3477 if (p.fs.weight >100) 3478 errx(EX_DATAERR, "weight must be <= 100"); 3479 } 3480 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 3481 if (p.fs.qsize > 1024*1024) 3482 errx(EX_DATAERR, "queue size must be < 1MB"); 3483 } else { 3484 if (p.fs.qsize > 100) 3485 errx(EX_DATAERR, "2 <= queue size <= 100"); 3486 } 3487 if (p.fs.flags_fs & DN_IS_RED) { 3488 size_t len; 3489 int lookup_depth, avg_pkt_size; 3490 double s, idle, weight, w_q; 3491 struct clockinfo ck; 3492 int t; 3493 3494 if (p.fs.min_th >= p.fs.max_th) 3495 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 3496 p.fs.min_th, p.fs.max_th); 3497 if (p.fs.max_th == 0) 3498 errx(EX_DATAERR, "max_th must be > 0"); 3499 3500 len = sizeof(int); 3501 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 3502 &lookup_depth, &len, NULL, 0) == -1) 3503 3504 errx(1, "sysctlbyname(\"%s\")", 3505 "net.inet.ip.dummynet.red_lookup_depth"); 3506 if (lookup_depth == 0) 3507 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 3508 " must be greater than zero"); 3509 3510 len = sizeof(int); 3511 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 3512 &avg_pkt_size, &len, NULL, 0) == -1) 3513 3514 errx(1, "sysctlbyname(\"%s\")", 3515 "net.inet.ip.dummynet.red_avg_pkt_size"); 3516 if (avg_pkt_size == 0) 3517 errx(EX_DATAERR, 3518 "net.inet.ip.dummynet.red_avg_pkt_size must" 3519 " be greater than zero"); 3520 3521 len = sizeof(struct clockinfo); 3522 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 3523 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 3524 3525 /* 3526 * Ticks needed for sending a medium-sized packet. 3527 * Unfortunately, when we are configuring a WF2Q+ queue, we 3528 * do not have bandwidth information, because that is stored 3529 * in the parent pipe, and also we have multiple queues 3530 * competing for it. So we set s=0, which is not very 3531 * correct. But on the other hand, why do we want RED with 3532 * WF2Q+ ? 3533 */ 3534 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 3535 s = 0; 3536 else 3537 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 3538 3539 /* 3540 * max idle time (in ticks) before avg queue size becomes 0. 3541 * NOTA: (3/w_q) is approx the value x so that 3542 * (1-w_q)^x < 10^-3. 3543 */ 3544 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 3545 idle = s * 3. / w_q; 3546 p.fs.lookup_step = (int)idle / lookup_depth; 3547 if (!p.fs.lookup_step) 3548 p.fs.lookup_step = 1; 3549 weight = 1 - w_q; 3550 for (t = p.fs.lookup_step; t > 0; --t) 3551 weight *= weight; 3552 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 3553 } 3554 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 3555 if (i) 3556 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 3557 } 3558 3559 static void 3560 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 3561 { 3562 int i, l; 3563 3564 for (i=0; i<6; i++) 3565 addr[i] = mask[i] = 0; 3566 if (strcmp(p, "any") == 0) 3567 return; 3568 3569 for (i=0; *p && i<6;i++, p++) { 3570 addr[i] = strtol(p, &p, 16); 3571 if (*p != ':') /* we start with the mask */ 3572 break; 3573 } 3574 if (*p == '/') { /* mask len */ 3575 l = strtol(p+1, &p, 0); 3576 for (i=0; l>0; l -=8, i++) 3577 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 3578 } else if (*p == '&') { /* mask */ 3579 for (i=0, p++; *p && i<6;i++, p++) { 3580 mask[i] = strtol(p, &p, 16); 3581 if (*p != ':') 3582 break; 3583 } 3584 } else if (*p == '\0') { 3585 for (i=0; i<6; i++) 3586 mask[i] = 0xff; 3587 } 3588 for (i=0; i<6; i++) 3589 addr[i] &= mask[i]; 3590 } 3591 3592 /* 3593 * helper function, updates the pointer to cmd with the length 3594 * of the current command, and also cleans up the first word of 3595 * the new command in case it has been clobbered before. 3596 */ 3597 static ipfw_insn * 3598 next_cmd(ipfw_insn *cmd) 3599 { 3600 cmd += F_LEN(cmd); 3601 bzero(cmd, sizeof(*cmd)); 3602 return cmd; 3603 } 3604 3605 /* 3606 * Takes arguments and copies them into a comment 3607 */ 3608 static void 3609 fill_comment(ipfw_insn *cmd, int ac, char **av) 3610 { 3611 int i, l; 3612 char *p = (char *)(cmd + 1); 3613 3614 cmd->opcode = O_NOP; 3615 cmd->len = (cmd->len & (F_NOT | F_OR)); 3616 3617 /* Compute length of comment string. */ 3618 for (i = 0, l = 0; i < ac; i++) 3619 l += strlen(av[i]) + 1; 3620 if (l == 0) 3621 return; 3622 if (l > 84) 3623 errx(EX_DATAERR, 3624 "comment too long (max 80 chars)"); 3625 l = 1 + (l+3)/4; 3626 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3627 for (i = 0; i < ac; i++) { 3628 strcpy(p, av[i]); 3629 p += strlen(av[i]); 3630 *p++ = ' '; 3631 } 3632 *(--p) = '\0'; 3633 } 3634 3635 /* 3636 * A function to fill simple commands of size 1. 3637 * Existing flags are preserved. 3638 */ 3639 static void 3640 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3641 { 3642 cmd->opcode = opcode; 3643 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3644 cmd->arg1 = arg; 3645 } 3646 3647 /* 3648 * Fetch and add the MAC address and type, with masks. This generates one or 3649 * two microinstructions, and returns the pointer to the last one. 3650 */ 3651 static ipfw_insn * 3652 add_mac(ipfw_insn *cmd, int ac, char *av[]) 3653 { 3654 ipfw_insn_mac *mac; 3655 3656 if (ac < 2) 3657 errx(EX_DATAERR, "MAC dst src"); 3658 3659 cmd->opcode = O_MACADDR2; 3660 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3661 3662 mac = (ipfw_insn_mac *)cmd; 3663 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3664 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 3665 return cmd; 3666 } 3667 3668 static ipfw_insn * 3669 add_mactype(ipfw_insn *cmd, int ac, char *av) 3670 { 3671 if (ac < 1) 3672 errx(EX_DATAERR, "missing MAC type"); 3673 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3674 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 3675 cmd->opcode = O_MAC_TYPE; 3676 return cmd; 3677 } else 3678 return NULL; 3679 } 3680 3681 static ipfw_insn * 3682 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3683 { 3684 struct protoent *pe; 3685 char *ep; 3686 int proto; 3687 3688 proto = strtol(av, &ep, 10); 3689 if (*ep != '\0' || proto <= 0) { 3690 if ((pe = getprotobyname(av)) == NULL) 3691 return NULL; 3692 proto = pe->p_proto; 3693 } 3694 3695 fill_cmd(cmd, O_PROTO, 0, proto); 3696 *protop = proto; 3697 return cmd; 3698 } 3699 3700 static ipfw_insn * 3701 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3702 { 3703 u_char proto = IPPROTO_IP; 3704 3705 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3706 ; /* do not set O_IP4 nor O_IP6 */ 3707 else if (strcmp(av, "ip4") == 0) 3708 /* explicit "just IPv4" rule */ 3709 fill_cmd(cmd, O_IP4, 0, 0); 3710 else if (strcmp(av, "ip6") == 0) { 3711 /* explicit "just IPv6" rule */ 3712 proto = IPPROTO_IPV6; 3713 fill_cmd(cmd, O_IP6, 0, 0); 3714 } else 3715 return add_proto0(cmd, av, protop); 3716 3717 *protop = proto; 3718 return cmd; 3719 } 3720 3721 static ipfw_insn * 3722 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3723 { 3724 u_char proto = IPPROTO_IP; 3725 3726 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3727 ; /* do not set O_IP4 nor O_IP6 */ 3728 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3729 /* explicit "just IPv4" rule */ 3730 fill_cmd(cmd, O_IP4, 0, 0); 3731 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3732 /* explicit "just IPv6" rule */ 3733 proto = IPPROTO_IPV6; 3734 fill_cmd(cmd, O_IP6, 0, 0); 3735 } else 3736 return add_proto0(cmd, av, protop); 3737 3738 *protop = proto; 3739 return cmd; 3740 } 3741 3742 static ipfw_insn * 3743 add_srcip(ipfw_insn *cmd, char *av) 3744 { 3745 fill_ip((ipfw_insn_ip *)cmd, av); 3746 if (cmd->opcode == O_IP_DST_SET) /* set */ 3747 cmd->opcode = O_IP_SRC_SET; 3748 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3749 cmd->opcode = O_IP_SRC_LOOKUP; 3750 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3751 cmd->opcode = O_IP_SRC_ME; 3752 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3753 cmd->opcode = O_IP_SRC; 3754 else /* addr/mask */ 3755 cmd->opcode = O_IP_SRC_MASK; 3756 return cmd; 3757 } 3758 3759 static ipfw_insn * 3760 add_dstip(ipfw_insn *cmd, char *av) 3761 { 3762 fill_ip((ipfw_insn_ip *)cmd, av); 3763 if (cmd->opcode == O_IP_DST_SET) /* set */ 3764 ; 3765 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3766 ; 3767 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3768 cmd->opcode = O_IP_DST_ME; 3769 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3770 cmd->opcode = O_IP_DST; 3771 else /* addr/mask */ 3772 cmd->opcode = O_IP_DST_MASK; 3773 return cmd; 3774 } 3775 3776 static ipfw_insn * 3777 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 3778 { 3779 if (_substrcmp(av, "any") == 0) { 3780 return NULL; 3781 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 3782 /* XXX todo: check that we have a protocol with ports */ 3783 cmd->opcode = opcode; 3784 return cmd; 3785 } 3786 return NULL; 3787 } 3788 3789 static ipfw_insn * 3790 add_src(ipfw_insn *cmd, char *av, u_char proto) 3791 { 3792 struct in6_addr a; 3793 char *host, *ch; 3794 ipfw_insn *ret = NULL; 3795 3796 if ((host = strdup(av)) == NULL) 3797 return NULL; 3798 if ((ch = strrchr(host, '/')) != NULL) 3799 *ch = '\0'; 3800 3801 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3802 inet_pton(AF_INET6, host, &a)) 3803 ret = add_srcip6(cmd, av); 3804 /* XXX: should check for IPv4, not !IPv6 */ 3805 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3806 !inet_pton(AF_INET6, host, &a))) 3807 ret = add_srcip(cmd, av); 3808 if (ret == NULL && strcmp(av, "any") != 0) 3809 ret = cmd; 3810 3811 free(host); 3812 return ret; 3813 } 3814 3815 static ipfw_insn * 3816 add_dst(ipfw_insn *cmd, char *av, u_char proto) 3817 { 3818 struct in6_addr a; 3819 char *host, *ch; 3820 ipfw_insn *ret = NULL; 3821 3822 if ((host = strdup(av)) == NULL) 3823 return NULL; 3824 if ((ch = strrchr(host, '/')) != NULL) 3825 *ch = '\0'; 3826 3827 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3828 inet_pton(AF_INET6, host, &a)) 3829 ret = add_dstip6(cmd, av); 3830 /* XXX: should check for IPv4, not !IPv6 */ 3831 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3832 !inet_pton(AF_INET6, host, &a))) 3833 ret = add_dstip(cmd, av); 3834 if (ret == NULL && strcmp(av, "any") != 0) 3835 ret = cmd; 3836 3837 free(host); 3838 return ret; 3839 } 3840 3841 /* 3842 * Parse arguments and assemble the microinstructions which make up a rule. 3843 * Rules are added into the 'rulebuf' and then copied in the correct order 3844 * into the actual rule. 3845 * 3846 * The syntax for a rule starts with the action, followed by 3847 * optional action parameters, and the various match patterns. 3848 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3849 * (generated if the rule includes a keep-state option), then the 3850 * various match patterns, log/altq actions, and the actual action. 3851 * 3852 */ 3853 static void 3854 add(int ac, char *av[]) 3855 { 3856 /* 3857 * rules are added into the 'rulebuf' and then copied in 3858 * the correct order into the actual rule. 3859 * Some things that need to go out of order (prob, action etc.) 3860 * go into actbuf[]. 3861 */ 3862 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3863 3864 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3865 ipfw_insn *first_cmd; /* first match pattern */ 3866 3867 struct ip_fw *rule; 3868 3869 /* 3870 * various flags used to record that we entered some fields. 3871 */ 3872 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3873 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3874 size_t len; 3875 3876 int i; 3877 3878 int open_par = 0; /* open parenthesis ( */ 3879 3880 /* proto is here because it is used to fetch ports */ 3881 u_char proto = IPPROTO_IP; /* default protocol */ 3882 3883 double match_prob = 1; /* match probability, default is always match */ 3884 3885 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3886 bzero(cmdbuf, sizeof(cmdbuf)); 3887 bzero(rulebuf, sizeof(rulebuf)); 3888 3889 rule = (struct ip_fw *)rulebuf; 3890 cmd = (ipfw_insn *)cmdbuf; 3891 action = (ipfw_insn *)actbuf; 3892 3893 av++; ac--; 3894 3895 /* [rule N] -- Rule number optional */ 3896 if (ac && isdigit(**av)) { 3897 rule->rulenum = atoi(*av); 3898 av++; 3899 ac--; 3900 } 3901 3902 /* [set N] -- set number (0..RESVD_SET), optional */ 3903 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3904 int set = strtoul(av[1], NULL, 10); 3905 if (set < 0 || set > RESVD_SET) 3906 errx(EX_DATAERR, "illegal set %s", av[1]); 3907 rule->set = set; 3908 av += 2; ac -= 2; 3909 } 3910 3911 /* [prob D] -- match probability, optional */ 3912 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3913 match_prob = strtod(av[1], NULL); 3914 3915 if (match_prob <= 0 || match_prob > 1) 3916 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3917 av += 2; ac -= 2; 3918 } 3919 3920 /* action -- mandatory */ 3921 NEED1("missing action"); 3922 i = match_token(rule_actions, *av); 3923 ac--; av++; 3924 action->len = 1; /* default */ 3925 switch(i) { 3926 case TOK_CHECKSTATE: 3927 have_state = action; 3928 action->opcode = O_CHECK_STATE; 3929 break; 3930 3931 case TOK_ACCEPT: 3932 action->opcode = O_ACCEPT; 3933 break; 3934 3935 case TOK_DENY: 3936 action->opcode = O_DENY; 3937 action->arg1 = 0; 3938 break; 3939 3940 case TOK_REJECT: 3941 action->opcode = O_REJECT; 3942 action->arg1 = ICMP_UNREACH_HOST; 3943 break; 3944 3945 case TOK_RESET: 3946 action->opcode = O_REJECT; 3947 action->arg1 = ICMP_REJECT_RST; 3948 break; 3949 3950 case TOK_RESET6: 3951 action->opcode = O_UNREACH6; 3952 action->arg1 = ICMP6_UNREACH_RST; 3953 break; 3954 3955 case TOK_UNREACH: 3956 action->opcode = O_REJECT; 3957 NEED1("missing reject code"); 3958 fill_reject_code(&action->arg1, *av); 3959 ac--; av++; 3960 break; 3961 3962 case TOK_UNREACH6: 3963 action->opcode = O_UNREACH6; 3964 NEED1("missing unreach code"); 3965 fill_unreach6_code(&action->arg1, *av); 3966 ac--; av++; 3967 break; 3968 3969 case TOK_COUNT: 3970 action->opcode = O_COUNT; 3971 break; 3972 3973 case TOK_QUEUE: 3974 action->opcode = O_QUEUE; 3975 goto chkarg; 3976 case TOK_PIPE: 3977 action->opcode = O_PIPE; 3978 goto chkarg; 3979 case TOK_SKIPTO: 3980 action->opcode = O_SKIPTO; 3981 goto chkarg; 3982 case TOK_NETGRAPH: 3983 action->opcode = O_NETGRAPH; 3984 goto chkarg; 3985 case TOK_NGTEE: 3986 action->opcode = O_NGTEE; 3987 goto chkarg; 3988 case TOK_DIVERT: 3989 action->opcode = O_DIVERT; 3990 goto chkarg; 3991 case TOK_TEE: 3992 action->opcode = O_TEE; 3993 chkarg: 3994 if (!ac) 3995 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3996 if (isdigit(**av)) { 3997 action->arg1 = strtoul(*av, NULL, 10); 3998 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3999 errx(EX_DATAERR, "illegal argument for %s", 4000 *(av - 1)); 4001 } else if (_substrcmp(*av, TABLEARG) == 0) { 4002 action->arg1 = IP_FW_TABLEARG; 4003 } else if (i == TOK_DIVERT || i == TOK_TEE) { 4004 struct servent *s; 4005 setservent(1); 4006 s = getservbyname(av[0], "divert"); 4007 if (s != NULL) 4008 action->arg1 = ntohs(s->s_port); 4009 else 4010 errx(EX_DATAERR, "illegal divert/tee port"); 4011 } else 4012 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4013 ac--; av++; 4014 break; 4015 4016 case TOK_FORWARD: { 4017 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4018 char *s, *end; 4019 4020 NEED1("missing forward address[:port]"); 4021 4022 action->opcode = O_FORWARD_IP; 4023 action->len = F_INSN_SIZE(ipfw_insn_sa); 4024 4025 p->sa.sin_len = sizeof(struct sockaddr_in); 4026 p->sa.sin_family = AF_INET; 4027 p->sa.sin_port = 0; 4028 /* 4029 * locate the address-port separator (':' or ',') 4030 */ 4031 s = strchr(*av, ':'); 4032 if (s == NULL) 4033 s = strchr(*av, ','); 4034 if (s != NULL) { 4035 *(s++) = '\0'; 4036 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4037 if (s == end) 4038 errx(EX_DATAERR, 4039 "illegal forwarding port ``%s''", s); 4040 p->sa.sin_port = (u_short)i; 4041 } 4042 if (_substrcmp(*av, "tablearg") == 0) 4043 p->sa.sin_addr.s_addr = INADDR_ANY; 4044 else 4045 lookup_host(*av, &(p->sa.sin_addr)); 4046 ac--; av++; 4047 break; 4048 } 4049 case TOK_COMMENT: 4050 /* pretend it is a 'count' rule followed by the comment */ 4051 action->opcode = O_COUNT; 4052 ac++; av--; /* go back... */ 4053 break; 4054 4055 default: 4056 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 4057 } 4058 action = next_cmd(action); 4059 4060 /* 4061 * [altq queuename] -- altq tag, optional 4062 * [log [logamount N]] -- log, optional 4063 * 4064 * If they exist, it go first in the cmdbuf, but then it is 4065 * skipped in the copy section to the end of the buffer. 4066 */ 4067 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 4068 ac--; av++; 4069 switch (i) { 4070 case TOK_LOG: 4071 { 4072 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4073 int l; 4074 4075 if (have_log) 4076 errx(EX_DATAERR, 4077 "log cannot be specified more than once"); 4078 have_log = (ipfw_insn *)c; 4079 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4080 cmd->opcode = O_LOG; 4081 if (ac && _substrcmp(*av, "logamount") == 0) { 4082 ac--; av++; 4083 NEED1("logamount requires argument"); 4084 l = atoi(*av); 4085 if (l < 0) 4086 errx(EX_DATAERR, 4087 "logamount must be positive"); 4088 c->max_log = l; 4089 ac--; av++; 4090 } else { 4091 len = sizeof(c->max_log); 4092 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4093 &c->max_log, &len, NULL, 0) == -1) 4094 errx(1, "sysctlbyname(\"%s\")", 4095 "net.inet.ip.fw.verbose_limit"); 4096 } 4097 } 4098 break; 4099 4100 case TOK_ALTQ: 4101 { 4102 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4103 4104 NEED1("missing altq queue name"); 4105 if (have_altq) 4106 errx(EX_DATAERR, 4107 "altq cannot be specified more than once"); 4108 have_altq = (ipfw_insn *)a; 4109 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4110 cmd->opcode = O_ALTQ; 4111 fill_altq_qid(&a->qid, *av); 4112 ac--; av++; 4113 } 4114 break; 4115 4116 case TOK_TAG: 4117 case TOK_UNTAG: { 4118 uint16_t tag; 4119 4120 if (have_tag) 4121 errx(EX_USAGE, "tag and untag cannot be " 4122 "specified more than once"); 4123 GET_UINT_ARG(tag, 1, 65534, i, rule_action_params); 4124 have_tag = cmd; 4125 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4126 ac--; av++; 4127 break; 4128 } 4129 4130 default: 4131 abort(); 4132 } 4133 cmd = next_cmd(cmd); 4134 } 4135 4136 if (have_state) /* must be a check-state, we are done */ 4137 goto done; 4138 4139 #define OR_START(target) \ 4140 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 4141 if (open_par) \ 4142 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4143 prev = NULL; \ 4144 open_par = 1; \ 4145 if ( (av[0])[1] == '\0') { \ 4146 ac--; av++; \ 4147 } else \ 4148 (*av)++; \ 4149 } \ 4150 target: \ 4151 4152 4153 #define CLOSE_PAR \ 4154 if (open_par) { \ 4155 if (ac && ( \ 4156 strcmp(*av, ")") == 0 || \ 4157 strcmp(*av, "}") == 0)) { \ 4158 prev = NULL; \ 4159 open_par = 0; \ 4160 ac--; av++; \ 4161 } else \ 4162 errx(EX_USAGE, "missing \")\"\n"); \ 4163 } 4164 4165 #define NOT_BLOCK \ 4166 if (ac && _substrcmp(*av, "not") == 0) { \ 4167 if (cmd->len & F_NOT) \ 4168 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4169 cmd->len |= F_NOT; \ 4170 ac--; av++; \ 4171 } 4172 4173 #define OR_BLOCK(target) \ 4174 if (ac && _substrcmp(*av, "or") == 0) { \ 4175 if (prev == NULL || open_par == 0) \ 4176 errx(EX_DATAERR, "invalid OR block"); \ 4177 prev->len |= F_OR; \ 4178 ac--; av++; \ 4179 goto target; \ 4180 } \ 4181 CLOSE_PAR; 4182 4183 first_cmd = cmd; 4184 4185 #if 0 4186 /* 4187 * MAC addresses, optional. 4188 * If we have this, we skip the part "proto from src to dst" 4189 * and jump straight to the option parsing. 4190 */ 4191 NOT_BLOCK; 4192 NEED1("missing protocol"); 4193 if (_substrcmp(*av, "MAC") == 0 || 4194 _substrcmp(*av, "mac") == 0) { 4195 ac--; av++; /* the "MAC" keyword */ 4196 add_mac(cmd, ac, av); /* exits in case of errors */ 4197 cmd = next_cmd(cmd); 4198 ac -= 2; av += 2; /* dst-mac and src-mac */ 4199 NOT_BLOCK; 4200 NEED1("missing mac type"); 4201 if (add_mactype(cmd, ac, av[0])) 4202 cmd = next_cmd(cmd); 4203 ac--; av++; /* any or mac-type */ 4204 goto read_options; 4205 } 4206 #endif 4207 4208 /* 4209 * protocol, mandatory 4210 */ 4211 OR_START(get_proto); 4212 NOT_BLOCK; 4213 NEED1("missing protocol"); 4214 if (add_proto_compat(cmd, *av, &proto)) { 4215 av++; ac--; 4216 if (F_LEN(cmd) != 0) { 4217 prev = cmd; 4218 cmd = next_cmd(cmd); 4219 } 4220 } else if (first_cmd != cmd) { 4221 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4222 } else 4223 goto read_options; 4224 OR_BLOCK(get_proto); 4225 4226 /* 4227 * "from", mandatory 4228 */ 4229 if (!ac || _substrcmp(*av, "from") != 0) 4230 errx(EX_USAGE, "missing ``from''"); 4231 ac--; av++; 4232 4233 /* 4234 * source IP, mandatory 4235 */ 4236 OR_START(source_ip); 4237 NOT_BLOCK; /* optional "not" */ 4238 NEED1("missing source address"); 4239 if (add_src(cmd, *av, proto)) { 4240 ac--; av++; 4241 if (F_LEN(cmd) != 0) { /* ! any */ 4242 prev = cmd; 4243 cmd = next_cmd(cmd); 4244 } 4245 } else 4246 errx(EX_USAGE, "bad source address %s", *av); 4247 OR_BLOCK(source_ip); 4248 4249 /* 4250 * source ports, optional 4251 */ 4252 NOT_BLOCK; /* optional "not" */ 4253 if (ac) { 4254 if (_substrcmp(*av, "any") == 0 || 4255 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4256 ac--; av++; 4257 if (F_LEN(cmd) != 0) 4258 cmd = next_cmd(cmd); 4259 } 4260 } 4261 4262 /* 4263 * "to", mandatory 4264 */ 4265 if (!ac || _substrcmp(*av, "to") != 0) 4266 errx(EX_USAGE, "missing ``to''"); 4267 av++; ac--; 4268 4269 /* 4270 * destination, mandatory 4271 */ 4272 OR_START(dest_ip); 4273 NOT_BLOCK; /* optional "not" */ 4274 NEED1("missing dst address"); 4275 if (add_dst(cmd, *av, proto)) { 4276 ac--; av++; 4277 if (F_LEN(cmd) != 0) { /* ! any */ 4278 prev = cmd; 4279 cmd = next_cmd(cmd); 4280 } 4281 } else 4282 errx( EX_USAGE, "bad destination address %s", *av); 4283 OR_BLOCK(dest_ip); 4284 4285 /* 4286 * dest. ports, optional 4287 */ 4288 NOT_BLOCK; /* optional "not" */ 4289 if (ac) { 4290 if (_substrcmp(*av, "any") == 0 || 4291 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4292 ac--; av++; 4293 if (F_LEN(cmd) != 0) 4294 cmd = next_cmd(cmd); 4295 } 4296 } 4297 4298 read_options: 4299 if (ac && first_cmd == cmd) { 4300 /* 4301 * nothing specified so far, store in the rule to ease 4302 * printout later. 4303 */ 4304 rule->_pad = 1; 4305 } 4306 prev = NULL; 4307 while (ac) { 4308 char *s; 4309 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4310 4311 s = *av; 4312 cmd32 = (ipfw_insn_u32 *)cmd; 4313 4314 if (*s == '!') { /* alternate syntax for NOT */ 4315 if (cmd->len & F_NOT) 4316 errx(EX_USAGE, "double \"not\" not allowed\n"); 4317 cmd->len = F_NOT; 4318 s++; 4319 } 4320 i = match_token(rule_options, s); 4321 ac--; av++; 4322 switch(i) { 4323 case TOK_NOT: 4324 if (cmd->len & F_NOT) 4325 errx(EX_USAGE, "double \"not\" not allowed\n"); 4326 cmd->len = F_NOT; 4327 break; 4328 4329 case TOK_OR: 4330 if (open_par == 0 || prev == NULL) 4331 errx(EX_USAGE, "invalid \"or\" block\n"); 4332 prev->len |= F_OR; 4333 break; 4334 4335 case TOK_STARTBRACE: 4336 if (open_par) 4337 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4338 open_par = 1; 4339 break; 4340 4341 case TOK_ENDBRACE: 4342 if (!open_par) 4343 errx(EX_USAGE, "+missing \")\"\n"); 4344 open_par = 0; 4345 prev = NULL; 4346 break; 4347 4348 case TOK_IN: 4349 fill_cmd(cmd, O_IN, 0, 0); 4350 break; 4351 4352 case TOK_OUT: 4353 cmd->len ^= F_NOT; /* toggle F_NOT */ 4354 fill_cmd(cmd, O_IN, 0, 0); 4355 break; 4356 4357 case TOK_DIVERTED: 4358 fill_cmd(cmd, O_DIVERTED, 0, 3); 4359 break; 4360 4361 case TOK_DIVERTEDLOOPBACK: 4362 fill_cmd(cmd, O_DIVERTED, 0, 1); 4363 break; 4364 4365 case TOK_DIVERTEDOUTPUT: 4366 fill_cmd(cmd, O_DIVERTED, 0, 2); 4367 break; 4368 4369 case TOK_FRAG: 4370 fill_cmd(cmd, O_FRAG, 0, 0); 4371 break; 4372 4373 case TOK_LAYER2: 4374 fill_cmd(cmd, O_LAYER2, 0, 0); 4375 break; 4376 4377 case TOK_XMIT: 4378 case TOK_RECV: 4379 case TOK_VIA: 4380 NEED1("recv, xmit, via require interface name" 4381 " or address"); 4382 fill_iface((ipfw_insn_if *)cmd, av[0]); 4383 ac--; av++; 4384 if (F_LEN(cmd) == 0) /* not a valid address */ 4385 break; 4386 if (i == TOK_XMIT) 4387 cmd->opcode = O_XMIT; 4388 else if (i == TOK_RECV) 4389 cmd->opcode = O_RECV; 4390 else if (i == TOK_VIA) 4391 cmd->opcode = O_VIA; 4392 break; 4393 4394 case TOK_ICMPTYPES: 4395 NEED1("icmptypes requires list of types"); 4396 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4397 av++; ac--; 4398 break; 4399 4400 case TOK_ICMP6TYPES: 4401 NEED1("icmptypes requires list of types"); 4402 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 4403 av++; ac--; 4404 break; 4405 4406 case TOK_IPTTL: 4407 NEED1("ipttl requires TTL"); 4408 if (strpbrk(*av, "-,")) { 4409 if (!add_ports(cmd, *av, 0, O_IPTTL)) 4410 errx(EX_DATAERR, "invalid ipttl %s", *av); 4411 } else 4412 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4413 ac--; av++; 4414 break; 4415 4416 case TOK_IPID: 4417 NEED1("ipid requires id"); 4418 if (strpbrk(*av, "-,")) { 4419 if (!add_ports(cmd, *av, 0, O_IPID)) 4420 errx(EX_DATAERR, "invalid ipid %s", *av); 4421 } else 4422 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4423 ac--; av++; 4424 break; 4425 4426 case TOK_IPLEN: 4427 NEED1("iplen requires length"); 4428 if (strpbrk(*av, "-,")) { 4429 if (!add_ports(cmd, *av, 0, O_IPLEN)) 4430 errx(EX_DATAERR, "invalid ip len %s", *av); 4431 } else 4432 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4433 ac--; av++; 4434 break; 4435 4436 case TOK_IPVER: 4437 NEED1("ipver requires version"); 4438 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4439 ac--; av++; 4440 break; 4441 4442 case TOK_IPPRECEDENCE: 4443 NEED1("ipprecedence requires value"); 4444 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4445 (strtoul(*av, NULL, 0) & 7) << 5); 4446 ac--; av++; 4447 break; 4448 4449 case TOK_IPOPTS: 4450 NEED1("missing argument for ipoptions"); 4451 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 4452 ac--; av++; 4453 break; 4454 4455 case TOK_IPTOS: 4456 NEED1("missing argument for iptos"); 4457 fill_flags(cmd, O_IPTOS, f_iptos, *av); 4458 ac--; av++; 4459 break; 4460 4461 case TOK_UID: 4462 NEED1("uid requires argument"); 4463 { 4464 char *end; 4465 uid_t uid; 4466 struct passwd *pwd; 4467 4468 cmd->opcode = O_UID; 4469 uid = strtoul(*av, &end, 0); 4470 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4471 if (pwd == NULL) 4472 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4473 cmd32->d[0] = pwd->pw_uid; 4474 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4475 ac--; av++; 4476 } 4477 break; 4478 4479 case TOK_GID: 4480 NEED1("gid requires argument"); 4481 { 4482 char *end; 4483 gid_t gid; 4484 struct group *grp; 4485 4486 cmd->opcode = O_GID; 4487 gid = strtoul(*av, &end, 0); 4488 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4489 if (grp == NULL) 4490 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4491 cmd32->d[0] = grp->gr_gid; 4492 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4493 ac--; av++; 4494 } 4495 break; 4496 4497 case TOK_JAIL: 4498 NEED1("jail requires argument"); 4499 { 4500 char *end; 4501 int jid; 4502 4503 cmd->opcode = O_JAIL; 4504 jid = (int)strtol(*av, &end, 0); 4505 if (jid < 0 || *end != '\0') 4506 errx(EX_DATAERR, "jail requires prison ID"); 4507 cmd32->d[0] = (uint32_t)jid; 4508 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4509 ac--; av++; 4510 } 4511 break; 4512 4513 case TOK_ESTAB: 4514 fill_cmd(cmd, O_ESTAB, 0, 0); 4515 break; 4516 4517 case TOK_SETUP: 4518 fill_cmd(cmd, O_TCPFLAGS, 0, 4519 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4520 break; 4521 4522 case TOK_TCPDATALEN: 4523 NEED1("tcpdatalen requires length"); 4524 if (strpbrk(*av, "-,")) { 4525 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 4526 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4527 } else 4528 fill_cmd(cmd, O_TCPDATALEN, 0, 4529 strtoul(*av, NULL, 0)); 4530 ac--; av++; 4531 break; 4532 4533 case TOK_TCPOPTS: 4534 NEED1("missing argument for tcpoptions"); 4535 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 4536 ac--; av++; 4537 break; 4538 4539 case TOK_TCPSEQ: 4540 case TOK_TCPACK: 4541 NEED1("tcpseq/tcpack requires argument"); 4542 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4543 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4544 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4545 ac--; av++; 4546 break; 4547 4548 case TOK_TCPWIN: 4549 NEED1("tcpwin requires length"); 4550 fill_cmd(cmd, O_TCPWIN, 0, 4551 htons(strtoul(*av, NULL, 0))); 4552 ac--; av++; 4553 break; 4554 4555 case TOK_TCPFLAGS: 4556 NEED1("missing argument for tcpflags"); 4557 cmd->opcode = O_TCPFLAGS; 4558 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 4559 ac--; av++; 4560 break; 4561 4562 case TOK_KEEPSTATE: 4563 if (open_par) 4564 errx(EX_USAGE, "keep-state cannot be part " 4565 "of an or block"); 4566 if (have_state) 4567 errx(EX_USAGE, "only one of keep-state " 4568 "and limit is allowed"); 4569 have_state = cmd; 4570 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4571 break; 4572 4573 case TOK_LIMIT: { 4574 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4575 int val; 4576 4577 if (open_par) 4578 errx(EX_USAGE, 4579 "limit cannot be part of an or block"); 4580 if (have_state) 4581 errx(EX_USAGE, "only one of keep-state and" 4582 "limit is allowed"); 4583 have_state = cmd; 4584 4585 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4586 cmd->opcode = O_LIMIT; 4587 c->limit_mask = c->conn_limit = 0; 4588 4589 while (ac > 0) { 4590 if ((val = match_token(limit_masks, *av)) <= 0) 4591 break; 4592 c->limit_mask |= val; 4593 ac--; av++; 4594 } 4595 4596 if (c->limit_mask == 0) 4597 errx(EX_USAGE, "limit: missing limit mask"); 4598 4599 GET_UINT_ARG(c->conn_limit, 1, 65534, TOK_LIMIT, 4600 rule_options); 4601 4602 ac--; av++; 4603 break; 4604 } 4605 4606 case TOK_PROTO: 4607 NEED1("missing protocol"); 4608 if (add_proto(cmd, *av, &proto)) { 4609 ac--; av++; 4610 } else 4611 errx(EX_DATAERR, "invalid protocol ``%s''", 4612 *av); 4613 break; 4614 4615 case TOK_SRCIP: 4616 NEED1("missing source IP"); 4617 if (add_srcip(cmd, *av)) { 4618 ac--; av++; 4619 } 4620 break; 4621 4622 case TOK_DSTIP: 4623 NEED1("missing destination IP"); 4624 if (add_dstip(cmd, *av)) { 4625 ac--; av++; 4626 } 4627 break; 4628 4629 case TOK_SRCIP6: 4630 NEED1("missing source IP6"); 4631 if (add_srcip6(cmd, *av)) { 4632 ac--; av++; 4633 } 4634 break; 4635 4636 case TOK_DSTIP6: 4637 NEED1("missing destination IP6"); 4638 if (add_dstip6(cmd, *av)) { 4639 ac--; av++; 4640 } 4641 break; 4642 4643 case TOK_SRCPORT: 4644 NEED1("missing source port"); 4645 if (_substrcmp(*av, "any") == 0 || 4646 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4647 ac--; av++; 4648 } else 4649 errx(EX_DATAERR, "invalid source port %s", *av); 4650 break; 4651 4652 case TOK_DSTPORT: 4653 NEED1("missing destination port"); 4654 if (_substrcmp(*av, "any") == 0 || 4655 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4656 ac--; av++; 4657 } else 4658 errx(EX_DATAERR, "invalid destination port %s", 4659 *av); 4660 break; 4661 4662 case TOK_MAC: 4663 if (add_mac(cmd, ac, av)) { 4664 ac -= 2; av += 2; 4665 } 4666 break; 4667 4668 case TOK_MACTYPE: 4669 NEED1("missing mac type"); 4670 if (!add_mactype(cmd, ac, *av)) 4671 errx(EX_DATAERR, "invalid mac type %s", *av); 4672 ac--; av++; 4673 break; 4674 4675 case TOK_VERREVPATH: 4676 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4677 break; 4678 4679 case TOK_VERSRCREACH: 4680 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4681 break; 4682 4683 case TOK_ANTISPOOF: 4684 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4685 break; 4686 4687 case TOK_IPSEC: 4688 fill_cmd(cmd, O_IPSEC, 0, 0); 4689 break; 4690 4691 case TOK_IPV6: 4692 fill_cmd(cmd, O_IP6, 0, 0); 4693 break; 4694 4695 case TOK_IPV4: 4696 fill_cmd(cmd, O_IP4, 0, 0); 4697 break; 4698 4699 case TOK_EXT6HDR: 4700 fill_ext6hdr( cmd, *av ); 4701 ac--; av++; 4702 break; 4703 4704 case TOK_FLOWID: 4705 if (proto != IPPROTO_IPV6 ) 4706 errx( EX_USAGE, "flow-id filter is active " 4707 "only for ipv6 protocol\n"); 4708 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 4709 ac--; av++; 4710 break; 4711 4712 case TOK_COMMENT: 4713 fill_comment(cmd, ac, av); 4714 av += ac; 4715 ac = 0; 4716 break; 4717 4718 case TOK_TAGGED: 4719 if (ac > 0 && strpbrk(*av, "-,")) { 4720 if (!add_ports(cmd, *av, 0, O_TAGGED)) 4721 errx(EX_DATAERR, "tagged: invalid tag" 4722 " list: %s", *av); 4723 } 4724 else { 4725 uint16_t tag; 4726 4727 GET_UINT_ARG(tag, 1, 65534, TOK_TAGGED, 4728 rule_options); 4729 fill_cmd(cmd, O_TAGGED, 0, tag); 4730 } 4731 ac--; av++; 4732 break; 4733 4734 default: 4735 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4736 } 4737 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4738 prev = cmd; 4739 cmd = next_cmd(cmd); 4740 } 4741 } 4742 4743 done: 4744 /* 4745 * Now copy stuff into the rule. 4746 * If we have a keep-state option, the first instruction 4747 * must be a PROBE_STATE (which is generated here). 4748 * If we have a LOG option, it was stored as the first command, 4749 * and now must be moved to the top of the action part. 4750 */ 4751 dst = (ipfw_insn *)rule->cmd; 4752 4753 /* 4754 * First thing to write into the command stream is the match probability. 4755 */ 4756 if (match_prob != 1) { /* 1 means always match */ 4757 dst->opcode = O_PROB; 4758 dst->len = 2; 4759 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4760 dst += dst->len; 4761 } 4762 4763 /* 4764 * generate O_PROBE_STATE if necessary 4765 */ 4766 if (have_state && have_state->opcode != O_CHECK_STATE) { 4767 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4768 dst = next_cmd(dst); 4769 } 4770 4771 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4772 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4773 i = F_LEN(src); 4774 4775 switch (src->opcode) { 4776 case O_LOG: 4777 case O_KEEP_STATE: 4778 case O_LIMIT: 4779 case O_ALTQ: 4780 case O_TAG: 4781 break; 4782 default: 4783 bcopy(src, dst, i * sizeof(uint32_t)); 4784 dst += i; 4785 } 4786 } 4787 4788 /* 4789 * put back the have_state command as last opcode 4790 */ 4791 if (have_state && have_state->opcode != O_CHECK_STATE) { 4792 i = F_LEN(have_state); 4793 bcopy(have_state, dst, i * sizeof(uint32_t)); 4794 dst += i; 4795 } 4796 /* 4797 * start action section 4798 */ 4799 rule->act_ofs = dst - rule->cmd; 4800 4801 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4802 if (have_log) { 4803 i = F_LEN(have_log); 4804 bcopy(have_log, dst, i * sizeof(uint32_t)); 4805 dst += i; 4806 } 4807 if (have_altq) { 4808 i = F_LEN(have_altq); 4809 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4810 dst += i; 4811 } 4812 if (have_tag) { 4813 i = F_LEN(have_tag); 4814 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4815 dst += i; 4816 } 4817 /* 4818 * copy all other actions 4819 */ 4820 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4821 i = F_LEN(src); 4822 bcopy(src, dst, i * sizeof(uint32_t)); 4823 dst += i; 4824 } 4825 4826 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4827 i = (char *)dst - (char *)rule; 4828 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 4829 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 4830 if (!do_quiet) 4831 show_ipfw(rule, 0, 0); 4832 } 4833 4834 static void 4835 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 4836 { 4837 int rulenum; 4838 int failed = EX_OK; 4839 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 4840 4841 av++; ac--; 4842 4843 if (!ac) { 4844 /* clear all entries */ 4845 if (do_cmd(optname, NULL, 0) < 0) 4846 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 4847 if (!do_quiet) 4848 printf("%s.\n", optname == IP_FW_ZERO ? 4849 "Accounting cleared":"Logging counts reset"); 4850 4851 return; 4852 } 4853 4854 while (ac) { 4855 /* Rule number */ 4856 if (isdigit(**av)) { 4857 rulenum = atoi(*av); 4858 av++; 4859 ac--; 4860 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 4861 warn("rule %u: setsockopt(IP_FW_%s)", 4862 rulenum, name); 4863 failed = EX_UNAVAILABLE; 4864 } else if (!do_quiet) 4865 printf("Entry %d %s.\n", rulenum, 4866 optname == IP_FW_ZERO ? 4867 "cleared" : "logging count reset"); 4868 } else { 4869 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4870 } 4871 } 4872 if (failed != EX_OK) 4873 exit(failed); 4874 } 4875 4876 static void 4877 flush(int force) 4878 { 4879 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 4880 4881 if (!force && !do_quiet) { /* need to ask user */ 4882 int c; 4883 4884 printf("Are you sure? [yn] "); 4885 fflush(stdout); 4886 do { 4887 c = toupper(getc(stdin)); 4888 while (c != '\n' && getc(stdin) != '\n') 4889 if (feof(stdin)) 4890 return; /* and do not flush */ 4891 } while (c != 'Y' && c != 'N'); 4892 printf("\n"); 4893 if (c == 'N') /* user said no */ 4894 return; 4895 } 4896 if (do_cmd(cmd, NULL, 0) < 0) 4897 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 4898 do_pipe ? "DUMMYNET" : "FW"); 4899 if (!do_quiet) 4900 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 4901 } 4902 4903 /* 4904 * Free a the (locally allocated) copy of command line arguments. 4905 */ 4906 static void 4907 free_args(int ac, char **av) 4908 { 4909 int i; 4910 4911 for (i=0; i < ac; i++) 4912 free(av[i]); 4913 free(av); 4914 } 4915 4916 /* 4917 * This one handles all table-related commands 4918 * ipfw table N add addr[/masklen] [value] 4919 * ipfw table N delete addr[/masklen] 4920 * ipfw table N flush 4921 * ipfw table N list 4922 */ 4923 static void 4924 table_handler(int ac, char *av[]) 4925 { 4926 ipfw_table_entry ent; 4927 ipfw_table *tbl; 4928 int do_add; 4929 char *p; 4930 socklen_t l; 4931 uint32_t a; 4932 4933 ac--; av++; 4934 if (ac && isdigit(**av)) { 4935 ent.tbl = atoi(*av); 4936 ac--; av++; 4937 } else 4938 errx(EX_USAGE, "table number required"); 4939 NEED1("table needs command"); 4940 if (_substrcmp(*av, "add") == 0 || 4941 _substrcmp(*av, "delete") == 0) { 4942 do_add = **av == 'a'; 4943 ac--; av++; 4944 if (!ac) 4945 errx(EX_USAGE, "IP address required"); 4946 p = strchr(*av, '/'); 4947 if (p) { 4948 *p++ = '\0'; 4949 ent.masklen = atoi(p); 4950 if (ent.masklen > 32) 4951 errx(EX_DATAERR, "bad width ``%s''", p); 4952 } else 4953 ent.masklen = 32; 4954 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 4955 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4956 ac--; av++; 4957 if (do_add && ac) { 4958 unsigned int tval; 4959 /* isdigit is a bit of a hack here.. */ 4960 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 4961 ent.value = strtoul(*av, NULL, 0); 4962 } else { 4963 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 4964 /* The value must be stored in host order * 4965 * so that the values < 65k can be distinguished */ 4966 ent.value = ntohl(tval); 4967 } else { 4968 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4969 } 4970 } 4971 } else 4972 ent.value = 0; 4973 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 4974 &ent, sizeof(ent)) < 0) { 4975 /* If running silent, don't bomb out on these errors. */ 4976 if (!(do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 4977 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 4978 do_add ? "ADD" : "DEL"); 4979 /* In silent mode, react to a failed add by deleting */ 4980 if (do_add) { 4981 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 4982 if (do_cmd(IP_FW_TABLE_ADD, 4983 &ent, sizeof(ent)) < 0) 4984 err(EX_OSERR, 4985 "setsockopt(IP_FW_TABLE_ADD)"); 4986 } 4987 } 4988 } else if (_substrcmp(*av, "flush") == 0) { 4989 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4990 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4991 } else if (_substrcmp(*av, "list") == 0) { 4992 a = ent.tbl; 4993 l = sizeof(a); 4994 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4995 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4996 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4997 tbl = malloc(l); 4998 if (tbl == NULL) 4999 err(EX_OSERR, "malloc"); 5000 tbl->tbl = ent.tbl; 5001 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 5002 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 5003 for (a = 0; a < tbl->cnt; a++) { 5004 /* Heuristic to print it the right way */ 5005 /* values < 64k are printed as numbers */ 5006 unsigned int tval; 5007 tval = tbl->ent[a].value; 5008 if (tval > 0xffff) { 5009 char tbuf[128]; 5010 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 5011 &tbl->ent[a].addr), 127); 5012 /* inet_ntoa expects host order */ 5013 tval = htonl(tval); 5014 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 5015 inet_ntoa(*(struct in_addr *)&tval)); 5016 } else { 5017 printf("%s/%u %u\n", 5018 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 5019 tbl->ent[a].masklen, tbl->ent[a].value); 5020 } 5021 } 5022 } else 5023 errx(EX_USAGE, "invalid table command %s", *av); 5024 } 5025 5026 /* 5027 * Called with the arguments (excluding program name). 5028 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 5029 */ 5030 static int 5031 ipfw_main(int oldac, char **oldav) 5032 { 5033 int ch, ac, save_ac; 5034 char **av, **save_av; 5035 int do_acct = 0; /* Show packet/byte count */ 5036 5037 #define WHITESP " \t\f\v\n\r" 5038 if (oldac == 0) 5039 return 1; 5040 else if (oldac == 1) { 5041 /* 5042 * If we are called with a single string, try to split it into 5043 * arguments for subsequent parsing. 5044 * But first, remove spaces after a ',', by copying the string 5045 * in-place. 5046 */ 5047 char *arg = oldav[0]; /* The string... */ 5048 int l = strlen(arg); 5049 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 5050 int i, j; 5051 for (i = j = 0; i < l; i++) { 5052 if (arg[i] == '#') /* comment marker */ 5053 break; 5054 if (copy) { 5055 arg[j++] = arg[i]; 5056 copy = !index("," WHITESP, arg[i]); 5057 } else { 5058 copy = !index(WHITESP, arg[i]); 5059 if (copy) 5060 arg[j++] = arg[i]; 5061 } 5062 } 5063 if (!copy && j > 0) /* last char was a 'blank', remove it */ 5064 j--; 5065 l = j; /* the new argument length */ 5066 arg[j++] = '\0'; 5067 if (l == 0) /* empty string! */ 5068 return 1; 5069 5070 /* 5071 * First, count number of arguments. Because of the previous 5072 * processing, this is just the number of blanks plus 1. 5073 */ 5074 for (i = 0, ac = 1; i < l; i++) 5075 if (index(WHITESP, arg[i]) != NULL) 5076 ac++; 5077 5078 av = calloc(ac, sizeof(char *)); 5079 5080 /* 5081 * Second, copy arguments from cmd[] to av[]. For each one, 5082 * j is the initial character, i is the one past the end. 5083 */ 5084 for (ac = 0, i = j = 0; i < l; i++) 5085 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 5086 if (i == l-1) 5087 i++; 5088 av[ac] = calloc(i-j+1, 1); 5089 bcopy(arg+j, av[ac], i-j); 5090 ac++; 5091 j = i + 1; 5092 } 5093 } else { 5094 /* 5095 * If an argument ends with ',' join with the next one. 5096 */ 5097 int first, i, l; 5098 5099 av = calloc(oldac, sizeof(char *)); 5100 for (first = i = ac = 0, l = 0; i < oldac; i++) { 5101 char *arg = oldav[i]; 5102 int k = strlen(arg); 5103 5104 l += k; 5105 if (arg[k-1] != ',' || i == oldac-1) { 5106 /* Time to copy. */ 5107 av[ac] = calloc(l+1, 1); 5108 for (l=0; first <= i; first++) { 5109 strcat(av[ac]+l, oldav[first]); 5110 l += strlen(oldav[first]); 5111 } 5112 ac++; 5113 l = 0; 5114 first = i+1; 5115 } 5116 } 5117 } 5118 5119 /* Set the force flag for non-interactive processes */ 5120 if (!do_force) 5121 do_force = !isatty(STDIN_FILENO); 5122 5123 /* Save arguments for final freeing of memory. */ 5124 save_ac = ac; 5125 save_av = av; 5126 5127 optind = optreset = 0; 5128 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 5129 switch (ch) { 5130 case 'a': 5131 do_acct = 1; 5132 break; 5133 5134 case 'b': 5135 comment_only = 1; 5136 do_compact = 1; 5137 break; 5138 5139 case 'c': 5140 do_compact = 1; 5141 break; 5142 5143 case 'd': 5144 do_dynamic = 1; 5145 break; 5146 5147 case 'e': 5148 do_expired = 1; 5149 break; 5150 5151 case 'f': 5152 do_force = 1; 5153 break; 5154 5155 case 'h': /* help */ 5156 free_args(save_ac, save_av); 5157 help(); 5158 break; /* NOTREACHED */ 5159 5160 case 'n': 5161 test_only = 1; 5162 break; 5163 5164 case 'N': 5165 do_resolv = 1; 5166 break; 5167 5168 case 'q': 5169 do_quiet = 1; 5170 break; 5171 5172 case 's': /* sort */ 5173 do_sort = atoi(optarg); 5174 break; 5175 5176 case 'S': 5177 show_sets = 1; 5178 break; 5179 5180 case 't': 5181 do_time = 1; 5182 break; 5183 5184 case 'T': 5185 do_time = 2; /* numeric timestamp */ 5186 break; 5187 5188 case 'v': /* verbose */ 5189 verbose = 1; 5190 break; 5191 5192 default: 5193 free_args(save_ac, save_av); 5194 return 1; 5195 } 5196 5197 ac -= optind; 5198 av += optind; 5199 NEED1("bad arguments, for usage summary ``ipfw''"); 5200 5201 /* 5202 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 5203 * e.g. "100 add allow ..." instead of "add 100 allow ...". 5204 * In case, swap first and second argument to get the normal form. 5205 */ 5206 if (ac > 1 && isdigit(*av[0])) { 5207 char *p = av[0]; 5208 5209 av[0] = av[1]; 5210 av[1] = p; 5211 } 5212 5213 /* 5214 * optional: pipe or queue 5215 */ 5216 do_pipe = 0; 5217 if (_substrcmp(*av, "pipe") == 0) 5218 do_pipe = 1; 5219 else if (_substrcmp(*av, "queue") == 0) 5220 do_pipe = 2; 5221 if (do_pipe) { 5222 ac--; 5223 av++; 5224 } 5225 NEED1("missing command"); 5226 5227 /* 5228 * For pipes and queues we normally say 'pipe NN config' 5229 * but the code is easier to parse as 'pipe config NN' 5230 * so we swap the two arguments. 5231 */ 5232 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 5233 char *p = av[0]; 5234 5235 av[0] = av[1]; 5236 av[1] = p; 5237 } 5238 5239 if (_substrcmp(*av, "add") == 0) 5240 add(ac, av); 5241 else if (do_pipe && _substrcmp(*av, "config") == 0) 5242 config_pipe(ac, av); 5243 else if (_substrcmp(*av, "delete") == 0) 5244 delete(ac, av); 5245 else if (_substrcmp(*av, "flush") == 0) 5246 flush(do_force); 5247 else if (_substrcmp(*av, "zero") == 0) 5248 zero(ac, av, IP_FW_ZERO); 5249 else if (_substrcmp(*av, "resetlog") == 0) 5250 zero(ac, av, IP_FW_RESETLOG); 5251 else if (_substrcmp(*av, "print") == 0 || 5252 _substrcmp(*av, "list") == 0) 5253 list(ac, av, do_acct); 5254 else if (_substrcmp(*av, "set") == 0) 5255 sets_handler(ac, av); 5256 else if (_substrcmp(*av, "table") == 0) 5257 table_handler(ac, av); 5258 else if (_substrcmp(*av, "enable") == 0) 5259 sysctl_handler(ac, av, 1); 5260 else if (_substrcmp(*av, "disable") == 0) 5261 sysctl_handler(ac, av, 0); 5262 else if (_substrcmp(*av, "show") == 0) 5263 list(ac, av, 1 /* show counters */); 5264 else 5265 errx(EX_USAGE, "bad command `%s'", *av); 5266 5267 /* Free memory allocated in the argument parsing. */ 5268 free_args(save_ac, save_av); 5269 return 0; 5270 } 5271 5272 5273 static void 5274 ipfw_readfile(int ac, char *av[]) 5275 { 5276 #define MAX_ARGS 32 5277 char buf[BUFSIZ]; 5278 char *cmd = NULL, *filename = av[ac-1]; 5279 int c, lineno=0; 5280 FILE *f = NULL; 5281 pid_t preproc = 0; 5282 5283 filename = av[ac-1]; 5284 5285 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 5286 switch(c) { 5287 case 'c': 5288 do_compact = 1; 5289 break; 5290 5291 case 'f': 5292 do_force = 1; 5293 break; 5294 5295 case 'N': 5296 do_resolv = 1; 5297 break; 5298 5299 case 'n': 5300 test_only = 1; 5301 break; 5302 5303 case 'p': 5304 cmd = optarg; 5305 /* 5306 * Skip previous args and delete last one, so we 5307 * pass all but the last argument to the preprocessor 5308 * via av[optind-1] 5309 */ 5310 av += optind - 1; 5311 ac -= optind - 1; 5312 if (ac < 2) 5313 errx(EX_USAGE, "no filename argument"); 5314 av[ac-1] = NULL; 5315 fprintf(stderr, "command is %s\n", av[0]); 5316 break; 5317 5318 case 'q': 5319 do_quiet = 1; 5320 break; 5321 5322 case 'S': 5323 show_sets = 1; 5324 break; 5325 5326 default: 5327 errx(EX_USAGE, "bad arguments, for usage" 5328 " summary ``ipfw''"); 5329 } 5330 5331 if (cmd != NULL) 5332 break; 5333 } 5334 5335 if (cmd == NULL && ac != optind + 1) { 5336 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 5337 errx(EX_USAGE, "extraneous filename arguments"); 5338 } 5339 5340 if ((f = fopen(filename, "r")) == NULL) 5341 err(EX_UNAVAILABLE, "fopen: %s", filename); 5342 5343 if (cmd != NULL) { /* pipe through preprocessor */ 5344 int pipedes[2]; 5345 5346 if (pipe(pipedes) == -1) 5347 err(EX_OSERR, "cannot create pipe"); 5348 5349 preproc = fork(); 5350 if (preproc == -1) 5351 err(EX_OSERR, "cannot fork"); 5352 5353 if (preproc == 0) { 5354 /* 5355 * Child, will run the preprocessor with the 5356 * file on stdin and the pipe on stdout. 5357 */ 5358 if (dup2(fileno(f), 0) == -1 5359 || dup2(pipedes[1], 1) == -1) 5360 err(EX_OSERR, "dup2()"); 5361 fclose(f); 5362 close(pipedes[1]); 5363 close(pipedes[0]); 5364 execvp(cmd, av); 5365 err(EX_OSERR, "execvp(%s) failed", cmd); 5366 } else { /* parent, will reopen f as the pipe */ 5367 fclose(f); 5368 close(pipedes[1]); 5369 if ((f = fdopen(pipedes[0], "r")) == NULL) { 5370 int savederrno = errno; 5371 5372 (void)kill(preproc, SIGTERM); 5373 errno = savederrno; 5374 err(EX_OSERR, "fdopen()"); 5375 } 5376 } 5377 } 5378 5379 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 5380 char linename[10]; 5381 char *args[1]; 5382 5383 lineno++; 5384 sprintf(linename, "Line %d", lineno); 5385 setprogname(linename); /* XXX */ 5386 args[0] = buf; 5387 ipfw_main(1, args); 5388 } 5389 fclose(f); 5390 if (cmd != NULL) { 5391 int status; 5392 5393 if (waitpid(preproc, &status, 0) == -1) 5394 errx(EX_OSERR, "waitpid()"); 5395 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 5396 errx(EX_UNAVAILABLE, 5397 "preprocessor exited with status %d", 5398 WEXITSTATUS(status)); 5399 else if (WIFSIGNALED(status)) 5400 errx(EX_UNAVAILABLE, 5401 "preprocessor exited with signal %d", 5402 WTERMSIG(status)); 5403 } 5404 } 5405 5406 int 5407 main(int ac, char *av[]) 5408 { 5409 /* 5410 * If the last argument is an absolute pathname, interpret it 5411 * as a file to be preprocessed. 5412 */ 5413 5414 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 5415 ipfw_readfile(ac, av); 5416 else { 5417 if (ipfw_main(ac-1, av+1)) 5418 show_usage(); 5419 } 5420 return EX_OK; 5421 } 5422