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 cmd->d[0] = 0; 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 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1549 if (s->sa.sin_port) 1550 printf(",%d", s->sa.sin_port); 1551 } 1552 break; 1553 1554 case O_LOG: /* O_LOG is printed last */ 1555 logptr = (ipfw_insn_log *)cmd; 1556 break; 1557 1558 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1559 altqptr = (ipfw_insn_altq *)cmd; 1560 break; 1561 1562 case O_TAG: 1563 tagptr = cmd; 1564 break; 1565 1566 default: 1567 printf("** unrecognized action %d len %d ", 1568 cmd->opcode, cmd->len); 1569 } 1570 } 1571 if (logptr) { 1572 if (logptr->max_log > 0) 1573 printf(" log logamount %d", logptr->max_log); 1574 else 1575 printf(" log"); 1576 } 1577 if (altqptr) { 1578 const char *qname; 1579 1580 qname = altq_qid_to_name(altqptr->qid); 1581 if (qname == NULL) 1582 printf(" altq ?<%u>", altqptr->qid); 1583 else 1584 printf(" altq %s", qname); 1585 } 1586 if (tagptr) { 1587 if (tagptr->len & F_NOT) 1588 PRINT_UINT_ARG(" untag ", tagptr->arg1); 1589 else 1590 PRINT_UINT_ARG(" tag ", tagptr->arg1); 1591 } 1592 1593 /* 1594 * then print the body. 1595 */ 1596 for (l = rule->act_ofs, cmd = rule->cmd ; 1597 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1598 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1599 continue; 1600 if (cmd->opcode == O_IP4) { 1601 flags |= HAVE_PROTO4; 1602 break; 1603 } else if (cmd->opcode == O_IP6) { 1604 flags |= HAVE_PROTO6; 1605 break; 1606 } 1607 } 1608 if (rule->_pad & 1) { /* empty rules before options */ 1609 if (!do_compact) { 1610 show_prerequisites(&flags, HAVE_PROTO, 0); 1611 printf(" from any to any"); 1612 } 1613 flags |= HAVE_IP | HAVE_OPTIONS; 1614 } 1615 1616 if (comment_only) 1617 comment = "..."; 1618 1619 for (l = rule->act_ofs, cmd = rule->cmd ; 1620 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1621 /* useful alias */ 1622 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1623 1624 if (comment_only) { 1625 if (cmd->opcode != O_NOP) 1626 continue; 1627 printf(" // %s\n", (char *)(cmd + 1)); 1628 return; 1629 } 1630 1631 show_prerequisites(&flags, 0, cmd->opcode); 1632 1633 switch(cmd->opcode) { 1634 case O_PROB: 1635 break; /* done already */ 1636 1637 case O_PROBE_STATE: 1638 break; /* no need to print anything here */ 1639 1640 case O_MACADDR2: { 1641 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1642 1643 if ((cmd->len & F_OR) && !or_block) 1644 printf(" {"); 1645 if (cmd->len & F_NOT) 1646 printf(" not"); 1647 printf(" MAC"); 1648 flags |= HAVE_MAC; 1649 print_mac(m->addr, m->mask); 1650 print_mac(m->addr + 6, m->mask + 6); 1651 } 1652 break; 1653 1654 case O_MAC_TYPE: 1655 if ((cmd->len & F_OR) && !or_block) 1656 printf(" {"); 1657 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1658 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1659 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1660 break; 1661 1662 case O_IP_SRC: 1663 case O_IP_SRC_LOOKUP: 1664 case O_IP_SRC_MASK: 1665 case O_IP_SRC_ME: 1666 case O_IP_SRC_SET: 1667 show_prerequisites(&flags, HAVE_PROTO, 0); 1668 if (!(flags & HAVE_SRCIP)) 1669 printf(" from"); 1670 if ((cmd->len & F_OR) && !or_block) 1671 printf(" {"); 1672 print_ip((ipfw_insn_ip *)cmd, 1673 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1674 flags |= HAVE_SRCIP; 1675 break; 1676 1677 case O_IP_DST: 1678 case O_IP_DST_LOOKUP: 1679 case O_IP_DST_MASK: 1680 case O_IP_DST_ME: 1681 case O_IP_DST_SET: 1682 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1683 if (!(flags & HAVE_DSTIP)) 1684 printf(" to"); 1685 if ((cmd->len & F_OR) && !or_block) 1686 printf(" {"); 1687 print_ip((ipfw_insn_ip *)cmd, 1688 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1689 flags |= HAVE_DSTIP; 1690 break; 1691 1692 case O_IP6_SRC: 1693 case O_IP6_SRC_MASK: 1694 case O_IP6_SRC_ME: 1695 show_prerequisites(&flags, HAVE_PROTO, 0); 1696 if (!(flags & HAVE_SRCIP)) 1697 printf(" from"); 1698 if ((cmd->len & F_OR) && !or_block) 1699 printf(" {"); 1700 print_ip6((ipfw_insn_ip6 *)cmd, 1701 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1702 flags |= HAVE_SRCIP | HAVE_PROTO; 1703 break; 1704 1705 case O_IP6_DST: 1706 case O_IP6_DST_MASK: 1707 case O_IP6_DST_ME: 1708 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1709 if (!(flags & HAVE_DSTIP)) 1710 printf(" to"); 1711 if ((cmd->len & F_OR) && !or_block) 1712 printf(" {"); 1713 print_ip6((ipfw_insn_ip6 *)cmd, 1714 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1715 flags |= HAVE_DSTIP; 1716 break; 1717 1718 case O_FLOW6ID: 1719 print_flow6id( (ipfw_insn_u32 *) cmd ); 1720 flags |= HAVE_OPTIONS; 1721 break; 1722 1723 case O_IP_DSTPORT: 1724 show_prerequisites(&flags, HAVE_IP, 0); 1725 case O_IP_SRCPORT: 1726 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1727 if ((cmd->len & F_OR) && !or_block) 1728 printf(" {"); 1729 print_newports((ipfw_insn_u16 *)cmd, proto, 1730 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1731 break; 1732 1733 case O_PROTO: { 1734 struct protoent *pe = NULL; 1735 1736 if ((cmd->len & F_OR) && !or_block) 1737 printf(" {"); 1738 if (cmd->len & F_NOT) 1739 printf(" not"); 1740 proto = cmd->arg1; 1741 pe = getprotobynumber(cmd->arg1); 1742 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1743 !(flags & HAVE_PROTO)) 1744 show_prerequisites(&flags, 1745 HAVE_IP | HAVE_OPTIONS, 0); 1746 if (flags & HAVE_OPTIONS) 1747 printf(" proto"); 1748 if (pe) 1749 printf(" %s", pe->p_name); 1750 else 1751 printf(" %u", cmd->arg1); 1752 } 1753 flags |= HAVE_PROTO; 1754 break; 1755 1756 default: /*options ... */ 1757 if (!(cmd->len & (F_OR|F_NOT))) 1758 if (((cmd->opcode == O_IP6) && 1759 (flags & HAVE_PROTO6)) || 1760 ((cmd->opcode == O_IP4) && 1761 (flags & HAVE_PROTO4))) 1762 break; 1763 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1764 if ((cmd->len & F_OR) && !or_block) 1765 printf(" {"); 1766 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1767 printf(" not"); 1768 switch(cmd->opcode) { 1769 case O_FRAG: 1770 printf(" frag"); 1771 break; 1772 1773 case O_IN: 1774 printf(cmd->len & F_NOT ? " out" : " in"); 1775 break; 1776 1777 case O_DIVERTED: 1778 switch (cmd->arg1) { 1779 case 3: 1780 printf(" diverted"); 1781 break; 1782 case 1: 1783 printf(" diverted-loopback"); 1784 break; 1785 case 2: 1786 printf(" diverted-output"); 1787 break; 1788 default: 1789 printf(" diverted-?<%u>", cmd->arg1); 1790 break; 1791 } 1792 break; 1793 1794 case O_LAYER2: 1795 printf(" layer2"); 1796 break; 1797 case O_XMIT: 1798 case O_RECV: 1799 case O_VIA: 1800 { 1801 char const *s; 1802 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1803 1804 if (cmd->opcode == O_XMIT) 1805 s = "xmit"; 1806 else if (cmd->opcode == O_RECV) 1807 s = "recv"; 1808 else /* if (cmd->opcode == O_VIA) */ 1809 s = "via"; 1810 if (cmdif->name[0] == '\0') 1811 printf(" %s %s", s, 1812 inet_ntoa(cmdif->p.ip)); 1813 else 1814 printf(" %s %s", s, cmdif->name); 1815 1816 break; 1817 } 1818 case O_IPID: 1819 if (F_LEN(cmd) == 1) 1820 printf(" ipid %u", cmd->arg1 ); 1821 else 1822 print_newports((ipfw_insn_u16 *)cmd, 0, 1823 O_IPID); 1824 break; 1825 1826 case O_IPTTL: 1827 if (F_LEN(cmd) == 1) 1828 printf(" ipttl %u", cmd->arg1 ); 1829 else 1830 print_newports((ipfw_insn_u16 *)cmd, 0, 1831 O_IPTTL); 1832 break; 1833 1834 case O_IPVER: 1835 printf(" ipver %u", cmd->arg1 ); 1836 break; 1837 1838 case O_IPPRECEDENCE: 1839 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1840 break; 1841 1842 case O_IPLEN: 1843 if (F_LEN(cmd) == 1) 1844 printf(" iplen %u", cmd->arg1 ); 1845 else 1846 print_newports((ipfw_insn_u16 *)cmd, 0, 1847 O_IPLEN); 1848 break; 1849 1850 case O_IPOPT: 1851 print_flags("ipoptions", cmd, f_ipopts); 1852 break; 1853 1854 case O_IPTOS: 1855 print_flags("iptos", cmd, f_iptos); 1856 break; 1857 1858 case O_ICMPTYPE: 1859 print_icmptypes((ipfw_insn_u32 *)cmd); 1860 break; 1861 1862 case O_ESTAB: 1863 printf(" established"); 1864 break; 1865 1866 case O_TCPDATALEN: 1867 if (F_LEN(cmd) == 1) 1868 printf(" tcpdatalen %u", cmd->arg1 ); 1869 else 1870 print_newports((ipfw_insn_u16 *)cmd, 0, 1871 O_TCPDATALEN); 1872 break; 1873 1874 case O_TCPFLAGS: 1875 print_flags("tcpflags", cmd, f_tcpflags); 1876 break; 1877 1878 case O_TCPOPTS: 1879 print_flags("tcpoptions", cmd, f_tcpopts); 1880 break; 1881 1882 case O_TCPWIN: 1883 printf(" tcpwin %d", ntohs(cmd->arg1)); 1884 break; 1885 1886 case O_TCPACK: 1887 printf(" tcpack %d", ntohl(cmd32->d[0])); 1888 break; 1889 1890 case O_TCPSEQ: 1891 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1892 break; 1893 1894 case O_UID: 1895 { 1896 struct passwd *pwd = getpwuid(cmd32->d[0]); 1897 1898 if (pwd) 1899 printf(" uid %s", pwd->pw_name); 1900 else 1901 printf(" uid %u", cmd32->d[0]); 1902 } 1903 break; 1904 1905 case O_GID: 1906 { 1907 struct group *grp = getgrgid(cmd32->d[0]); 1908 1909 if (grp) 1910 printf(" gid %s", grp->gr_name); 1911 else 1912 printf(" gid %u", cmd32->d[0]); 1913 } 1914 break; 1915 1916 case O_JAIL: 1917 printf(" jail %d", cmd32->d[0]); 1918 break; 1919 1920 case O_VERREVPATH: 1921 printf(" verrevpath"); 1922 break; 1923 1924 case O_VERSRCREACH: 1925 printf(" versrcreach"); 1926 break; 1927 1928 case O_ANTISPOOF: 1929 printf(" antispoof"); 1930 break; 1931 1932 case O_IPSEC: 1933 printf(" ipsec"); 1934 break; 1935 1936 case O_NOP: 1937 comment = (char *)(cmd + 1); 1938 break; 1939 1940 case O_KEEP_STATE: 1941 printf(" keep-state"); 1942 break; 1943 1944 case O_LIMIT: { 1945 struct _s_x *p = limit_masks; 1946 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1947 uint8_t x = c->limit_mask; 1948 char const *comma = " "; 1949 1950 printf(" limit"); 1951 for (; p->x != 0 ; p++) 1952 if ((x & p->x) == p->x) { 1953 x &= ~p->x; 1954 printf("%s%s", comma, p->s); 1955 comma = ","; 1956 } 1957 PRINT_UINT_ARG(" ", c->conn_limit); 1958 break; 1959 } 1960 1961 case O_IP6: 1962 printf(" ip6"); 1963 break; 1964 1965 case O_IP4: 1966 printf(" ip4"); 1967 break; 1968 1969 case O_ICMP6TYPE: 1970 print_icmp6types((ipfw_insn_u32 *)cmd); 1971 break; 1972 1973 case O_EXT_HDR: 1974 print_ext6hdr( (ipfw_insn *) cmd ); 1975 break; 1976 1977 case O_TAGGED: 1978 if (F_LEN(cmd) == 1) 1979 PRINT_UINT_ARG(" tagged ", cmd->arg1); 1980 else 1981 print_newports((ipfw_insn_u16 *)cmd, 0, 1982 O_TAGGED); 1983 break; 1984 1985 default: 1986 printf(" [opcode %d len %d]", 1987 cmd->opcode, cmd->len); 1988 } 1989 } 1990 if (cmd->len & F_OR) { 1991 printf(" or"); 1992 or_block = 1; 1993 } else if (or_block) { 1994 printf(" }"); 1995 or_block = 0; 1996 } 1997 } 1998 show_prerequisites(&flags, HAVE_IP, 0); 1999 if (comment) 2000 printf(" // %s", comment); 2001 printf("\n"); 2002 } 2003 2004 static void 2005 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 2006 { 2007 struct protoent *pe; 2008 struct in_addr a; 2009 uint16_t rulenum; 2010 char buf[INET6_ADDRSTRLEN]; 2011 2012 if (!do_expired) { 2013 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2014 return; 2015 } 2016 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2017 printf("%05d", rulenum); 2018 if (pcwidth>0 || bcwidth>0) 2019 printf(" %*llu %*llu (%ds)", pcwidth, 2020 align_uint64(&d->pcnt), bcwidth, 2021 align_uint64(&d->bcnt), d->expire); 2022 switch (d->dyn_type) { 2023 case O_LIMIT_PARENT: 2024 printf(" PARENT %d", d->count); 2025 break; 2026 case O_LIMIT: 2027 printf(" LIMIT"); 2028 break; 2029 case O_KEEP_STATE: /* bidir, no mask */ 2030 printf(" STATE"); 2031 break; 2032 } 2033 2034 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2035 printf(" %s", pe->p_name); 2036 else 2037 printf(" proto %u", d->id.proto); 2038 2039 if (d->id.addr_type == 4) { 2040 a.s_addr = htonl(d->id.src_ip); 2041 printf(" %s %d", inet_ntoa(a), d->id.src_port); 2042 2043 a.s_addr = htonl(d->id.dst_ip); 2044 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 2045 } else if (d->id.addr_type == 6) { 2046 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2047 sizeof(buf)), d->id.src_port); 2048 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 2049 sizeof(buf)), d->id.dst_port); 2050 } else 2051 printf(" UNKNOWN <-> UNKNOWN\n"); 2052 2053 printf("\n"); 2054 } 2055 2056 static int 2057 sort_q(const void *pa, const void *pb) 2058 { 2059 int rev = (do_sort < 0); 2060 int field = rev ? -do_sort : do_sort; 2061 long long res = 0; 2062 const struct dn_flow_queue *a = pa; 2063 const struct dn_flow_queue *b = pb; 2064 2065 switch (field) { 2066 case 1: /* pkts */ 2067 res = a->len - b->len; 2068 break; 2069 case 2: /* bytes */ 2070 res = a->len_bytes - b->len_bytes; 2071 break; 2072 2073 case 3: /* tot pkts */ 2074 res = a->tot_pkts - b->tot_pkts; 2075 break; 2076 2077 case 4: /* tot bytes */ 2078 res = a->tot_bytes - b->tot_bytes; 2079 break; 2080 } 2081 if (res < 0) 2082 res = -1; 2083 if (res > 0) 2084 res = 1; 2085 return (int)(rev ? res : -res); 2086 } 2087 2088 static void 2089 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2090 { 2091 int l; 2092 int index_printed, indexes = 0; 2093 char buff[255]; 2094 struct protoent *pe; 2095 2096 if (fs->rq_elements == 0) 2097 return; 2098 2099 if (do_sort != 0) 2100 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2101 2102 /* Print IPv4 flows */ 2103 index_printed = 0; 2104 for (l = 0; l < fs->rq_elements; l++) { 2105 struct in_addr ina; 2106 2107 /* XXX: Should check for IPv4 flows */ 2108 if (IS_IP6_FLOW_ID(&(q[l].id))) 2109 continue; 2110 2111 if (!index_printed) { 2112 index_printed = 1; 2113 if (indexes > 0) /* currently a no-op */ 2114 printf("\n"); 2115 indexes++; 2116 printf(" " 2117 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2118 fs->flow_mask.proto, 2119 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2120 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2121 2122 printf("BKT Prot ___Source IP/port____ " 2123 "____Dest. IP/port____ " 2124 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2125 } 2126 2127 printf("%3d ", q[l].hash_slot); 2128 pe = getprotobynumber(q[l].id.proto); 2129 if (pe) 2130 printf("%-4s ", pe->p_name); 2131 else 2132 printf("%4u ", q[l].id.proto); 2133 ina.s_addr = htonl(q[l].id.src_ip); 2134 printf("%15s/%-5d ", 2135 inet_ntoa(ina), q[l].id.src_port); 2136 ina.s_addr = htonl(q[l].id.dst_ip); 2137 printf("%15s/%-5d ", 2138 inet_ntoa(ina), q[l].id.dst_port); 2139 printf("%4qu %8qu %2u %4u %3u\n", 2140 q[l].tot_pkts, q[l].tot_bytes, 2141 q[l].len, q[l].len_bytes, q[l].drops); 2142 if (verbose) 2143 printf(" S %20qd F %20qd\n", 2144 q[l].S, q[l].F); 2145 } 2146 2147 /* Print IPv6 flows */ 2148 index_printed = 0; 2149 for (l = 0; l < fs->rq_elements; l++) { 2150 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2151 continue; 2152 2153 if (!index_printed) { 2154 index_printed = 1; 2155 if (indexes > 0) 2156 printf("\n"); 2157 indexes++; 2158 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2159 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2160 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2161 buff, sizeof(buff)); 2162 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2163 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2164 buff, sizeof(buff) ); 2165 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2166 2167 printf("BKT ___Prot___ _flow-id_ " 2168 "______________Source IPv6/port_______________ " 2169 "_______________Dest. IPv6/port_______________ " 2170 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2171 } 2172 printf("%3d ", q[l].hash_slot); 2173 pe = getprotobynumber(q[l].id.proto); 2174 if (pe != NULL) 2175 printf("%9s ", pe->p_name); 2176 else 2177 printf("%9u ", q[l].id.proto); 2178 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2179 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2180 q[l].id.src_port); 2181 printf(" %39s/%-5d ", 2182 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2183 q[l].id.dst_port); 2184 printf(" %4qu %8qu %2u %4u %3u\n", 2185 q[l].tot_pkts, q[l].tot_bytes, 2186 q[l].len, q[l].len_bytes, q[l].drops); 2187 if (verbose) 2188 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2189 } 2190 } 2191 2192 static void 2193 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2194 { 2195 int l; 2196 char qs[30]; 2197 char plr[30]; 2198 char red[90]; /* Display RED parameters */ 2199 2200 l = fs->qsize; 2201 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2202 if (l >= 8192) 2203 sprintf(qs, "%d KB", l / 1024); 2204 else 2205 sprintf(qs, "%d B", l); 2206 } else 2207 sprintf(qs, "%3d sl.", l); 2208 if (fs->plr) 2209 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2210 else 2211 plr[0] = '\0'; 2212 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2213 sprintf(red, 2214 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2215 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2216 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2217 SCALE_VAL(fs->min_th), 2218 SCALE_VAL(fs->max_th), 2219 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2220 else 2221 sprintf(red, "droptail"); 2222 2223 printf("%s %s%s %d queues (%d buckets) %s\n", 2224 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2225 } 2226 2227 static void 2228 list_pipes(void *data, uint nbytes, int ac, char *av[]) 2229 { 2230 int rulenum; 2231 void *next = data; 2232 struct dn_pipe *p = (struct dn_pipe *) data; 2233 struct dn_flow_set *fs; 2234 struct dn_flow_queue *q; 2235 int l; 2236 2237 if (ac > 0) 2238 rulenum = strtoul(*av++, NULL, 10); 2239 else 2240 rulenum = 0; 2241 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2242 double b = p->bandwidth; 2243 char buf[30]; 2244 char prefix[80]; 2245 2246 if (p->next.sle_next != (struct dn_pipe *)DN_IS_PIPE) 2247 break; /* done with pipes, now queues */ 2248 2249 /* 2250 * compute length, as pipe have variable size 2251 */ 2252 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2253 next = (char *)p + l; 2254 nbytes -= l; 2255 2256 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2257 continue; 2258 2259 /* 2260 * Print rate (or clocking interface) 2261 */ 2262 if (p->if_name[0] != '\0') 2263 sprintf(buf, "%s", p->if_name); 2264 else if (b == 0) 2265 sprintf(buf, "unlimited"); 2266 else if (b >= 1000000) 2267 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2268 else if (b >= 1000) 2269 sprintf(buf, "%7.3f Kbit/s", b/1000); 2270 else 2271 sprintf(buf, "%7.3f bit/s ", b); 2272 2273 sprintf(prefix, "%05d: %s %4d ms ", 2274 p->pipe_nr, buf, p->delay); 2275 print_flowset_parms(&(p->fs), prefix); 2276 if (verbose) 2277 printf(" V %20qd\n", p->V >> MY_M); 2278 2279 q = (struct dn_flow_queue *)(p+1); 2280 list_queues(&(p->fs), q); 2281 } 2282 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2283 char prefix[80]; 2284 2285 if (fs->next.sle_next != (struct dn_flow_set *)DN_IS_QUEUE) 2286 break; 2287 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2288 next = (char *)fs + l; 2289 nbytes -= l; 2290 2291 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2292 (rulenum != fs->parent_nr && do_pipe == 1))) { 2293 continue; 2294 } 2295 2296 q = (struct dn_flow_queue *)(fs+1); 2297 sprintf(prefix, "q%05d: weight %d pipe %d ", 2298 fs->fs_nr, fs->weight, fs->parent_nr); 2299 print_flowset_parms(fs, prefix); 2300 list_queues(fs, q); 2301 } 2302 } 2303 2304 /* 2305 * This one handles all set-related commands 2306 * ipfw set { show | enable | disable } 2307 * ipfw set swap X Y 2308 * ipfw set move X to Y 2309 * ipfw set move rule X to Y 2310 */ 2311 static void 2312 sets_handler(int ac, char *av[]) 2313 { 2314 uint32_t set_disable, masks[2]; 2315 int i, nbytes; 2316 uint16_t rulenum; 2317 uint8_t cmd, new_set; 2318 2319 ac--; 2320 av++; 2321 2322 if (!ac) 2323 errx(EX_USAGE, "set needs command"); 2324 if (_substrcmp(*av, "show") == 0) { 2325 void *data; 2326 char const *msg; 2327 2328 nbytes = sizeof(struct ip_fw); 2329 if ((data = calloc(1, nbytes)) == NULL) 2330 err(EX_OSERR, "calloc"); 2331 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2332 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2333 bcopy(&((struct ip_fw *)data)->next_rule, 2334 &set_disable, sizeof(set_disable)); 2335 2336 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2337 if ((set_disable & (1<<i))) { 2338 printf("%s %d", msg, i); 2339 msg = ""; 2340 } 2341 msg = (set_disable) ? " enable" : "enable"; 2342 for (i = 0; i < RESVD_SET; i++) 2343 if (!(set_disable & (1<<i))) { 2344 printf("%s %d", msg, i); 2345 msg = ""; 2346 } 2347 printf("\n"); 2348 } else if (_substrcmp(*av, "swap") == 0) { 2349 ac--; av++; 2350 if (ac != 2) 2351 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2352 rulenum = atoi(av[0]); 2353 new_set = atoi(av[1]); 2354 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2355 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2356 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2357 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2358 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2359 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2360 } else if (_substrcmp(*av, "move") == 0) { 2361 ac--; av++; 2362 if (ac && _substrcmp(*av, "rule") == 0) { 2363 cmd = 2; 2364 ac--; av++; 2365 } else 2366 cmd = 3; 2367 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2368 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2369 rulenum = atoi(av[0]); 2370 new_set = atoi(av[2]); 2371 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2372 (cmd == 2 && rulenum == 65535) ) 2373 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2374 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2375 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2376 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2377 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2378 } else if (_substrcmp(*av, "disable") == 0 || 2379 _substrcmp(*av, "enable") == 0 ) { 2380 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2381 2382 ac--; av++; 2383 masks[0] = masks[1] = 0; 2384 2385 while (ac) { 2386 if (isdigit(**av)) { 2387 i = atoi(*av); 2388 if (i < 0 || i > RESVD_SET) 2389 errx(EX_DATAERR, 2390 "invalid set number %d\n", i); 2391 masks[which] |= (1<<i); 2392 } else if (_substrcmp(*av, "disable") == 0) 2393 which = 0; 2394 else if (_substrcmp(*av, "enable") == 0) 2395 which = 1; 2396 else 2397 errx(EX_DATAERR, 2398 "invalid set command %s\n", *av); 2399 av++; ac--; 2400 } 2401 if ( (masks[0] & masks[1]) != 0 ) 2402 errx(EX_DATAERR, 2403 "cannot enable and disable the same set\n"); 2404 2405 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2406 if (i) 2407 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2408 } else 2409 errx(EX_USAGE, "invalid set command %s\n", *av); 2410 } 2411 2412 static void 2413 sysctl_handler(int ac, char *av[], int which) 2414 { 2415 ac--; 2416 av++; 2417 2418 if (ac == 0) { 2419 warnx("missing keyword to enable/disable\n"); 2420 } else if (_substrcmp(*av, "firewall") == 0) { 2421 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2422 &which, sizeof(which)); 2423 } else if (_substrcmp(*av, "one_pass") == 0) { 2424 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2425 &which, sizeof(which)); 2426 } else if (_substrcmp(*av, "debug") == 0) { 2427 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2428 &which, sizeof(which)); 2429 } else if (_substrcmp(*av, "verbose") == 0) { 2430 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2431 &which, sizeof(which)); 2432 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2433 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2434 &which, sizeof(which)); 2435 } else if (_substrcmp(*av, "altq") == 0) { 2436 altq_set_enabled(which); 2437 } else { 2438 warnx("unrecognize enable/disable keyword: %s\n", *av); 2439 } 2440 } 2441 2442 static void 2443 list(int ac, char *av[], int show_counters) 2444 { 2445 struct ip_fw *r; 2446 ipfw_dyn_rule *dynrules, *d; 2447 2448 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2449 char *lim; 2450 void *data = NULL; 2451 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2452 int exitval = EX_OK; 2453 int lac; 2454 char **lav; 2455 u_long rnum, last; 2456 char *endptr; 2457 int seen = 0; 2458 2459 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2460 int nalloc = 1024; /* start somewhere... */ 2461 2462 last = 0; 2463 2464 if (test_only) { 2465 fprintf(stderr, "Testing only, list disabled\n"); 2466 return; 2467 } 2468 2469 ac--; 2470 av++; 2471 2472 /* get rules or pipes from kernel, resizing array as necessary */ 2473 nbytes = nalloc; 2474 2475 while (nbytes >= nalloc) { 2476 nalloc = nalloc * 2 + 200; 2477 nbytes = nalloc; 2478 if ((data = realloc(data, nbytes)) == NULL) 2479 err(EX_OSERR, "realloc"); 2480 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2481 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2482 do_pipe ? "DUMMYNET" : "FW"); 2483 } 2484 2485 if (do_pipe) { 2486 list_pipes(data, nbytes, ac, av); 2487 goto done; 2488 } 2489 2490 /* 2491 * Count static rules. They have variable size so we 2492 * need to scan the list to count them. 2493 */ 2494 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2495 r->rulenum < 65535 && (char *)r < lim; 2496 ++nstat, r = NEXT(r) ) 2497 ; /* nothing */ 2498 2499 /* 2500 * Count dynamic rules. This is easier as they have 2501 * fixed size. 2502 */ 2503 r = NEXT(r); 2504 dynrules = (ipfw_dyn_rule *)r ; 2505 n = (char *)r - (char *)data; 2506 ndyn = (nbytes - n) / sizeof *dynrules; 2507 2508 /* if showing stats, figure out column widths ahead of time */ 2509 bcwidth = pcwidth = 0; 2510 if (show_counters) { 2511 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2512 /* packet counter */ 2513 width = snprintf(NULL, 0, "%llu", 2514 align_uint64(&r->pcnt)); 2515 if (width > pcwidth) 2516 pcwidth = width; 2517 2518 /* byte counter */ 2519 width = snprintf(NULL, 0, "%llu", 2520 align_uint64(&r->bcnt)); 2521 if (width > bcwidth) 2522 bcwidth = width; 2523 } 2524 } 2525 if (do_dynamic && ndyn) { 2526 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2527 width = snprintf(NULL, 0, "%llu", 2528 align_uint64(&d->pcnt)); 2529 if (width > pcwidth) 2530 pcwidth = width; 2531 2532 width = snprintf(NULL, 0, "%llu", 2533 align_uint64(&d->bcnt)); 2534 if (width > bcwidth) 2535 bcwidth = width; 2536 } 2537 } 2538 /* if no rule numbers were specified, list all rules */ 2539 if (ac == 0) { 2540 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2541 show_ipfw(r, pcwidth, bcwidth); 2542 2543 if (do_dynamic && ndyn) { 2544 printf("## Dynamic rules (%d):\n", ndyn); 2545 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2546 show_dyn_ipfw(d, pcwidth, bcwidth); 2547 } 2548 goto done; 2549 } 2550 2551 /* display specific rules requested on command line */ 2552 2553 for (lac = ac, lav = av; lac != 0; lac--) { 2554 /* convert command line rule # */ 2555 last = rnum = strtoul(*lav++, &endptr, 10); 2556 if (*endptr == '-') 2557 last = strtoul(endptr+1, &endptr, 10); 2558 if (*endptr) { 2559 exitval = EX_USAGE; 2560 warnx("invalid rule number: %s", *(lav - 1)); 2561 continue; 2562 } 2563 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2564 if (r->rulenum > last) 2565 break; 2566 if (r->rulenum >= rnum && r->rulenum <= last) { 2567 show_ipfw(r, pcwidth, bcwidth); 2568 seen = 1; 2569 } 2570 } 2571 if (!seen) { 2572 /* give precedence to other error(s) */ 2573 if (exitval == EX_OK) 2574 exitval = EX_UNAVAILABLE; 2575 warnx("rule %lu does not exist", rnum); 2576 } 2577 } 2578 2579 if (do_dynamic && ndyn) { 2580 printf("## Dynamic rules:\n"); 2581 for (lac = ac, lav = av; lac != 0; lac--) { 2582 last = rnum = strtoul(*lav++, &endptr, 10); 2583 if (*endptr == '-') 2584 last = strtoul(endptr+1, &endptr, 10); 2585 if (*endptr) 2586 /* already warned */ 2587 continue; 2588 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2589 uint16_t rulenum; 2590 2591 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2592 if (rulenum > rnum) 2593 break; 2594 if (r->rulenum >= rnum && r->rulenum <= last) 2595 show_dyn_ipfw(d, pcwidth, bcwidth); 2596 } 2597 } 2598 } 2599 2600 ac = 0; 2601 2602 done: 2603 free(data); 2604 2605 if (exitval != EX_OK) 2606 exit(exitval); 2607 #undef NEXT 2608 } 2609 2610 static void 2611 show_usage(void) 2612 { 2613 fprintf(stderr, "usage: ipfw [options]\n" 2614 "do \"ipfw -h\" or see ipfw manpage for details\n" 2615 ); 2616 exit(EX_USAGE); 2617 } 2618 2619 static void 2620 help(void) 2621 { 2622 fprintf(stderr, 2623 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2624 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2625 "add [num] [set N] [prob x] RULE-BODY\n" 2626 "{pipe|queue} N config PIPE-BODY\n" 2627 "[pipe|queue] {zero|delete|show} [N{,N}]\n" 2628 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2629 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2630 "\n" 2631 "RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2632 "ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 2633 " skipto N | {divert|tee} PORT | forward ADDR |\n" 2634 " pipe N | queue N\n" 2635 "PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2636 "ADDR: [ MAC dst src ether_type ] \n" 2637 " [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2638 " [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2639 "IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2640 "IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2641 "IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2642 "IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2643 "OPTION_LIST: OPTION [OPTION_LIST]\n" 2644 "OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2645 " {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2646 " {dst-port|src-port} LIST |\n" 2647 " estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2648 " iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2649 " ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2650 " icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n" 2651 " mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2652 " setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2653 " tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2654 ); 2655 exit(0); 2656 } 2657 2658 2659 static int 2660 lookup_host (char *host, struct in_addr *ipaddr) 2661 { 2662 struct hostent *he; 2663 2664 if (!inet_aton(host, ipaddr)) { 2665 if ((he = gethostbyname(host)) == NULL) 2666 return(-1); 2667 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2668 } 2669 return(0); 2670 } 2671 2672 /* 2673 * fills the addr and mask fields in the instruction as appropriate from av. 2674 * Update length as appropriate. 2675 * The following formats are allowed: 2676 * me returns O_IP_*_ME 2677 * 1.2.3.4 single IP address 2678 * 1.2.3.4:5.6.7.8 address:mask 2679 * 1.2.3.4/24 address/mask 2680 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2681 * We can have multiple comma-separated address/mask entries. 2682 */ 2683 static void 2684 fill_ip(ipfw_insn_ip *cmd, char *av) 2685 { 2686 int len = 0; 2687 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2688 2689 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2690 2691 if (_substrcmp(av, "any") == 0) 2692 return; 2693 2694 if (_substrcmp(av, "me") == 0) { 2695 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2696 return; 2697 } 2698 2699 if (strncmp(av, "table(", 6) == 0) { 2700 char *p = strchr(av + 6, ','); 2701 2702 if (p) 2703 *p++ = '\0'; 2704 cmd->o.opcode = O_IP_DST_LOOKUP; 2705 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2706 if (p) { 2707 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2708 d[0] = strtoul(p, NULL, 0); 2709 } else 2710 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2711 return; 2712 } 2713 2714 while (av) { 2715 /* 2716 * After the address we can have '/' or ':' indicating a mask, 2717 * ',' indicating another address follows, '{' indicating a 2718 * set of addresses of unspecified size. 2719 */ 2720 char *p = strpbrk(av, "/:,{"); 2721 int masklen; 2722 char md; 2723 2724 if (p) { 2725 md = *p; 2726 *p++ = '\0'; 2727 } else 2728 md = '\0'; 2729 2730 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2731 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2732 switch (md) { 2733 case ':': 2734 if (!inet_aton(p, (struct in_addr *)&d[1])) 2735 errx(EX_DATAERR, "bad netmask ``%s''", p); 2736 break; 2737 case '/': 2738 masklen = atoi(p); 2739 if (masklen == 0) 2740 d[1] = htonl(0); /* mask */ 2741 else if (masklen > 32) 2742 errx(EX_DATAERR, "bad width ``%s''", p); 2743 else 2744 d[1] = htonl(~0 << (32 - masklen)); 2745 break; 2746 case '{': /* no mask, assume /24 and put back the '{' */ 2747 d[1] = htonl(~0 << (32 - 24)); 2748 *(--p) = md; 2749 break; 2750 2751 case ',': /* single address plus continuation */ 2752 *(--p) = md; 2753 /* FALLTHROUGH */ 2754 case 0: /* initialization value */ 2755 default: 2756 d[1] = htonl(~0); /* force /32 */ 2757 break; 2758 } 2759 d[0] &= d[1]; /* mask base address with mask */ 2760 /* find next separator */ 2761 if (p) 2762 p = strpbrk(p, ",{"); 2763 if (p && *p == '{') { 2764 /* 2765 * We have a set of addresses. They are stored as follows: 2766 * arg1 is the set size (powers of 2, 2..256) 2767 * addr is the base address IN HOST FORMAT 2768 * mask.. is an array of arg1 bits (rounded up to 2769 * the next multiple of 32) with bits set 2770 * for each host in the map. 2771 */ 2772 uint32_t *map = (uint32_t *)&cmd->mask; 2773 int low, high; 2774 int i = contigmask((uint8_t *)&(d[1]), 32); 2775 2776 if (len > 0) 2777 errx(EX_DATAERR, "address set cannot be in a list"); 2778 if (i < 24 || i > 31) 2779 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2780 cmd->o.arg1 = 1<<(32-i); /* map length */ 2781 d[0] = ntohl(d[0]); /* base addr in host format */ 2782 cmd->o.opcode = O_IP_DST_SET; /* default */ 2783 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2784 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2785 map[i] = 0; /* clear map */ 2786 2787 av = p + 1; 2788 low = d[0] & 0xff; 2789 high = low + cmd->o.arg1 - 1; 2790 /* 2791 * Here, i stores the previous value when we specify a range 2792 * of addresses within a mask, e.g. 45-63. i = -1 means we 2793 * have no previous value. 2794 */ 2795 i = -1; /* previous value in a range */ 2796 while (isdigit(*av)) { 2797 char *s; 2798 int a = strtol(av, &s, 0); 2799 2800 if (s == av) { /* no parameter */ 2801 if (*av != '}') 2802 errx(EX_DATAERR, "set not closed\n"); 2803 if (i != -1) 2804 errx(EX_DATAERR, "incomplete range %d-", i); 2805 break; 2806 } 2807 if (a < low || a > high) 2808 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2809 a, low, high); 2810 a -= low; 2811 if (i == -1) /* no previous in range */ 2812 i = a; 2813 else { /* check that range is valid */ 2814 if (i > a) 2815 errx(EX_DATAERR, "invalid range %d-%d", 2816 i+low, a+low); 2817 if (*s == '-') 2818 errx(EX_DATAERR, "double '-' in range"); 2819 } 2820 for (; i <= a; i++) 2821 map[i/32] |= 1<<(i & 31); 2822 i = -1; 2823 if (*s == '-') 2824 i = a; 2825 else if (*s == '}') 2826 break; 2827 av = s+1; 2828 } 2829 return; 2830 } 2831 av = p; 2832 if (av) /* then *av must be a ',' */ 2833 av++; 2834 2835 /* Check this entry */ 2836 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2837 /* 2838 * 'any' turns the entire list into a NOP. 2839 * 'not any' never matches, so it is removed from the 2840 * list unless it is the only item, in which case we 2841 * report an error. 2842 */ 2843 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2844 if (av == NULL && len == 0) /* only this entry */ 2845 errx(EX_DATAERR, "not any never matches"); 2846 } 2847 /* else do nothing and skip this entry */ 2848 return; 2849 } 2850 /* A single IP can be stored in an optimized format */ 2851 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2852 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2853 return; 2854 } 2855 len += 2; /* two words... */ 2856 d += 2; 2857 } /* end while */ 2858 cmd->o.len |= len+1; 2859 } 2860 2861 2862 /* Try to find ipv6 address by hostname */ 2863 static int 2864 lookup_host6 (char *host, struct in6_addr *ip6addr) 2865 { 2866 struct hostent *he; 2867 2868 if (!inet_pton(AF_INET6, host, ip6addr)) { 2869 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2870 return(-1); 2871 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2872 } 2873 return(0); 2874 } 2875 2876 2877 /* n2mask sets n bits of the mask */ 2878 static void 2879 n2mask(struct in6_addr *mask, int n) 2880 { 2881 static int minimask[9] = 2882 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2883 u_char *p; 2884 2885 memset(mask, 0, sizeof(struct in6_addr)); 2886 p = (u_char *) mask; 2887 for (; n > 0; p++, n -= 8) { 2888 if (n >= 8) 2889 *p = 0xff; 2890 else 2891 *p = minimask[n]; 2892 } 2893 return; 2894 } 2895 2896 2897 /* 2898 * fill the addr and mask fields in the instruction as appropriate from av. 2899 * Update length as appropriate. 2900 * The following formats are allowed: 2901 * any matches any IP6. Actually returns an empty instruction. 2902 * me returns O_IP6_*_ME 2903 * 2904 * 03f1::234:123:0342 single IP6 addres 2905 * 03f1::234:123:0342/24 address/mask 2906 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2907 * 2908 * Set of address (as in ipv6) not supported because ipv6 address 2909 * are typically random past the initial prefix. 2910 * Return 1 on success, 0 on failure. 2911 */ 2912 static int 2913 fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2914 { 2915 int len = 0; 2916 struct in6_addr *d = &(cmd->addr6); 2917 /* 2918 * Needed for multiple address. 2919 * Note d[1] points to struct in6_add r mask6 of cmd 2920 */ 2921 2922 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2923 2924 if (strcmp(av, "any") == 0) 2925 return (1); 2926 2927 2928 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2929 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2930 return (1); 2931 } 2932 2933 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2934 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2935 return (1); 2936 } 2937 2938 av = strdup(av); 2939 while (av) { 2940 /* 2941 * After the address we can have '/' indicating a mask, 2942 * or ',' indicating another address follows. 2943 */ 2944 2945 char *p; 2946 int masklen; 2947 char md = '\0'; 2948 2949 if ((p = strpbrk(av, "/,")) ) { 2950 md = *p; /* save the separator */ 2951 *p = '\0'; /* terminate address string */ 2952 p++; /* and skip past it */ 2953 } 2954 /* now p points to NULL, mask or next entry */ 2955 2956 /* lookup stores address in *d as a side effect */ 2957 if (lookup_host6(av, d) != 0) { 2958 /* XXX: failed. Free memory and go */ 2959 errx(EX_DATAERR, "bad address \"%s\"", av); 2960 } 2961 /* next, look at the mask, if any */ 2962 masklen = (md == '/') ? atoi(p) : 128; 2963 if (masklen > 128 || masklen < 0) 2964 errx(EX_DATAERR, "bad width \"%s\''", p); 2965 else 2966 n2mask(&d[1], masklen); 2967 2968 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2969 2970 /* find next separator */ 2971 2972 if (md == '/') { /* find separator past the mask */ 2973 p = strpbrk(p, ","); 2974 if (p != NULL) 2975 p++; 2976 } 2977 av = p; 2978 2979 /* Check this entry */ 2980 if (masklen == 0) { 2981 /* 2982 * 'any' turns the entire list into a NOP. 2983 * 'not any' never matches, so it is removed from the 2984 * list unless it is the only item, in which case we 2985 * report an error. 2986 */ 2987 if (cmd->o.len & F_NOT && av == NULL && len == 0) 2988 errx(EX_DATAERR, "not any never matches"); 2989 continue; 2990 } 2991 2992 /* 2993 * A single IP can be stored alone 2994 */ 2995 if (masklen == 128 && av == NULL && len == 0) { 2996 len = F_INSN_SIZE(struct in6_addr); 2997 break; 2998 } 2999 3000 /* Update length and pointer to arguments */ 3001 len += F_INSN_SIZE(struct in6_addr)*2; 3002 d += 2; 3003 } /* end while */ 3004 3005 /* 3006 * Total length of the command, remember that 1 is the size of 3007 * the base command. 3008 */ 3009 cmd->o.len |= len+1; 3010 free(av); 3011 return (1); 3012 } 3013 3014 /* 3015 * fills command for ipv6 flow-id filtering 3016 * note that the 20 bit flow number is stored in a array of u_int32_t 3017 * it's supported lists of flow-id, so in the o.arg1 we store how many 3018 * additional flow-id we want to filter, the basic is 1 3019 */ 3020 void 3021 fill_flow6( ipfw_insn_u32 *cmd, char *av ) 3022 { 3023 u_int32_t type; /* Current flow number */ 3024 u_int16_t nflow = 0; /* Current flow index */ 3025 char *s = av; 3026 cmd->d[0] = 0; /* Initializing the base number*/ 3027 3028 while (s) { 3029 av = strsep( &s, ",") ; 3030 type = strtoul(av, &av, 0); 3031 if (*av != ',' && *av != '\0') 3032 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3033 if (type > 0xfffff) 3034 errx(EX_DATAERR, "flow number out of range %s", av); 3035 cmd->d[nflow] |= type; 3036 nflow++; 3037 } 3038 if( nflow > 0 ) { 3039 cmd->o.opcode = O_FLOW6ID; 3040 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 3041 cmd->o.arg1 = nflow; 3042 } 3043 else { 3044 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 3045 } 3046 } 3047 3048 static ipfw_insn * 3049 add_srcip6(ipfw_insn *cmd, char *av) 3050 { 3051 3052 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3053 if (F_LEN(cmd) == 0) /* any */ 3054 ; 3055 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3056 cmd->opcode = O_IP6_SRC_ME; 3057 } else if (F_LEN(cmd) == 3058 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3059 /* single IP, no mask*/ 3060 cmd->opcode = O_IP6_SRC; 3061 } else { /* addr/mask opt */ 3062 cmd->opcode = O_IP6_SRC_MASK; 3063 } 3064 return cmd; 3065 } 3066 3067 static ipfw_insn * 3068 add_dstip6(ipfw_insn *cmd, char *av) 3069 { 3070 3071 fill_ip6((ipfw_insn_ip6 *)cmd, av); 3072 if (F_LEN(cmd) == 0) /* any */ 3073 ; 3074 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 3075 cmd->opcode = O_IP6_DST_ME; 3076 } else if (F_LEN(cmd) == 3077 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 3078 /* single IP, no mask*/ 3079 cmd->opcode = O_IP6_DST; 3080 } else { /* addr/mask opt */ 3081 cmd->opcode = O_IP6_DST_MASK; 3082 } 3083 return cmd; 3084 } 3085 3086 3087 /* 3088 * helper function to process a set of flags and set bits in the 3089 * appropriate masks. 3090 */ 3091 static void 3092 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3093 struct _s_x *flags, char *p) 3094 { 3095 uint8_t set=0, clear=0; 3096 3097 while (p && *p) { 3098 char *q; /* points to the separator */ 3099 int val; 3100 uint8_t *which; /* mask we are working on */ 3101 3102 if (*p == '!') { 3103 p++; 3104 which = &clear; 3105 } else 3106 which = &set; 3107 q = strchr(p, ','); 3108 if (q) 3109 *q++ = '\0'; 3110 val = match_token(flags, p); 3111 if (val <= 0) 3112 errx(EX_DATAERR, "invalid flag %s", p); 3113 *which |= (uint8_t)val; 3114 p = q; 3115 } 3116 cmd->opcode = opcode; 3117 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3118 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3119 } 3120 3121 3122 static void 3123 delete(int ac, char *av[]) 3124 { 3125 uint32_t rulenum; 3126 struct dn_pipe p; 3127 int i; 3128 int exitval = EX_OK; 3129 int do_set = 0; 3130 3131 memset(&p, 0, sizeof p); 3132 3133 av++; ac--; 3134 NEED1("missing rule specification"); 3135 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3136 do_set = 1; /* delete set */ 3137 ac--; av++; 3138 } 3139 3140 /* Rule number */ 3141 while (ac && isdigit(**av)) { 3142 i = atoi(*av); av++; ac--; 3143 if (do_pipe) { 3144 if (do_pipe == 1) 3145 p.pipe_nr = i; 3146 else 3147 p.fs.fs_nr = i; 3148 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3149 if (i) { 3150 exitval = 1; 3151 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3152 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3153 } 3154 } else { 3155 rulenum = (i & 0xffff) | (do_set << 24); 3156 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3157 if (i) { 3158 exitval = EX_UNAVAILABLE; 3159 warn("rule %u: setsockopt(IP_FW_DEL)", 3160 rulenum); 3161 } 3162 } 3163 } 3164 if (exitval != EX_OK) 3165 exit(exitval); 3166 } 3167 3168 3169 /* 3170 * fill the interface structure. We do not check the name as we can 3171 * create interfaces dynamically, so checking them at insert time 3172 * makes relatively little sense. 3173 * Interface names containing '*', '?', or '[' are assumed to be shell 3174 * patterns which match interfaces. 3175 */ 3176 static void 3177 fill_iface(ipfw_insn_if *cmd, char *arg) 3178 { 3179 cmd->name[0] = '\0'; 3180 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3181 3182 /* Parse the interface or address */ 3183 if (strcmp(arg, "any") == 0) 3184 cmd->o.len = 0; /* effectively ignore this command */ 3185 else if (!isdigit(*arg)) { 3186 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3187 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3188 } else if (!inet_aton(arg, &cmd->p.ip)) 3189 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3190 } 3191 3192 static void 3193 config_pipe(int ac, char **av) 3194 { 3195 struct dn_pipe p; 3196 int i; 3197 char *end; 3198 void *par = NULL; 3199 3200 memset(&p, 0, sizeof p); 3201 3202 av++; ac--; 3203 /* Pipe number */ 3204 if (ac && isdigit(**av)) { 3205 i = atoi(*av); av++; ac--; 3206 if (do_pipe == 1) 3207 p.pipe_nr = i; 3208 else 3209 p.fs.fs_nr = i; 3210 } 3211 while (ac > 0) { 3212 double d; 3213 int tok = match_token(dummynet_params, *av); 3214 ac--; av++; 3215 3216 switch(tok) { 3217 case TOK_NOERROR: 3218 p.fs.flags_fs |= DN_NOERROR; 3219 break; 3220 3221 case TOK_PLR: 3222 NEED1("plr needs argument 0..1\n"); 3223 d = strtod(av[0], NULL); 3224 if (d > 1) 3225 d = 1; 3226 else if (d < 0) 3227 d = 0; 3228 p.fs.plr = (int)(d*0x7fffffff); 3229 ac--; av++; 3230 break; 3231 3232 case TOK_QUEUE: 3233 NEED1("queue needs queue size\n"); 3234 end = NULL; 3235 p.fs.qsize = strtoul(av[0], &end, 0); 3236 if (*end == 'K' || *end == 'k') { 3237 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3238 p.fs.qsize *= 1024; 3239 } else if (*end == 'B' || 3240 _substrcmp2(end, "by", "bytes") == 0) { 3241 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3242 } 3243 ac--; av++; 3244 break; 3245 3246 case TOK_BUCKETS: 3247 NEED1("buckets needs argument\n"); 3248 p.fs.rq_size = strtoul(av[0], NULL, 0); 3249 ac--; av++; 3250 break; 3251 3252 case TOK_MASK: 3253 NEED1("mask needs mask specifier\n"); 3254 /* 3255 * per-flow queue, mask is dst_ip, dst_port, 3256 * src_ip, src_port, proto measured in bits 3257 */ 3258 par = NULL; 3259 3260 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 3261 end = NULL; 3262 3263 while (ac >= 1) { 3264 uint32_t *p32 = NULL; 3265 uint16_t *p16 = NULL; 3266 uint32_t *p20 = NULL; 3267 struct in6_addr *pa6 = NULL; 3268 uint32_t a; 3269 3270 tok = match_token(dummynet_params, *av); 3271 ac--; av++; 3272 switch(tok) { 3273 case TOK_ALL: 3274 /* 3275 * special case, all bits significant 3276 */ 3277 p.fs.flow_mask.dst_ip = ~0; 3278 p.fs.flow_mask.src_ip = ~0; 3279 p.fs.flow_mask.dst_port = ~0; 3280 p.fs.flow_mask.src_port = ~0; 3281 p.fs.flow_mask.proto = ~0; 3282 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 3283 n2mask(&(p.fs.flow_mask.src_ip6), 128); 3284 p.fs.flow_mask.flow_id6 = ~0; 3285 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3286 goto end_mask; 3287 3288 case TOK_DSTIP: 3289 p32 = &p.fs.flow_mask.dst_ip; 3290 break; 3291 3292 case TOK_SRCIP: 3293 p32 = &p.fs.flow_mask.src_ip; 3294 break; 3295 3296 case TOK_DSTIP6: 3297 pa6 = &(p.fs.flow_mask.dst_ip6); 3298 break; 3299 3300 case TOK_SRCIP6: 3301 pa6 = &(p.fs.flow_mask.src_ip6); 3302 break; 3303 3304 case TOK_FLOWID: 3305 p20 = &p.fs.flow_mask.flow_id6; 3306 break; 3307 3308 case TOK_DSTPORT: 3309 p16 = &p.fs.flow_mask.dst_port; 3310 break; 3311 3312 case TOK_SRCPORT: 3313 p16 = &p.fs.flow_mask.src_port; 3314 break; 3315 3316 case TOK_PROTO: 3317 break; 3318 3319 default: 3320 ac++; av--; /* backtrack */ 3321 goto end_mask; 3322 } 3323 if (ac < 1) 3324 errx(EX_USAGE, "mask: value missing"); 3325 if (*av[0] == '/') { 3326 a = strtoul(av[0]+1, &end, 0); 3327 if (pa6 == NULL) 3328 a = (a == 32) ? ~0 : (1 << a) - 1; 3329 } else 3330 a = strtoul(av[0], &end, 0); 3331 if (p32 != NULL) 3332 *p32 = a; 3333 else if (p16 != NULL) { 3334 if (a > 0xFFFF) 3335 errx(EX_DATAERR, 3336 "port mask must be 16 bit"); 3337 *p16 = (uint16_t)a; 3338 } else if (p20 != NULL) { 3339 if (a > 0xfffff) 3340 errx(EX_DATAERR, 3341 "flow_id mask must be 20 bit"); 3342 *p20 = (uint32_t)a; 3343 } else if (pa6 != NULL) { 3344 if (a < 0 || a > 128) 3345 errx(EX_DATAERR, 3346 "in6addr invalid mask len"); 3347 else 3348 n2mask(pa6, a); 3349 } else { 3350 if (a > 0xFF) 3351 errx(EX_DATAERR, 3352 "proto mask must be 8 bit"); 3353 p.fs.flow_mask.proto = (uint8_t)a; 3354 } 3355 if (a != 0) 3356 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3357 ac--; av++; 3358 } /* end while, config masks */ 3359 end_mask: 3360 break; 3361 3362 case TOK_RED: 3363 case TOK_GRED: 3364 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 3365 p.fs.flags_fs |= DN_IS_RED; 3366 if (tok == TOK_GRED) 3367 p.fs.flags_fs |= DN_IS_GENTLE_RED; 3368 /* 3369 * the format for parameters is w_q/min_th/max_th/max_p 3370 */ 3371 if ((end = strsep(&av[0], "/"))) { 3372 double w_q = strtod(end, NULL); 3373 if (w_q > 1 || w_q <= 0) 3374 errx(EX_DATAERR, "0 < w_q <= 1"); 3375 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 3376 } 3377 if ((end = strsep(&av[0], "/"))) { 3378 p.fs.min_th = strtoul(end, &end, 0); 3379 if (*end == 'K' || *end == 'k') 3380 p.fs.min_th *= 1024; 3381 } 3382 if ((end = strsep(&av[0], "/"))) { 3383 p.fs.max_th = strtoul(end, &end, 0); 3384 if (*end == 'K' || *end == 'k') 3385 p.fs.max_th *= 1024; 3386 } 3387 if ((end = strsep(&av[0], "/"))) { 3388 double max_p = strtod(end, NULL); 3389 if (max_p > 1 || max_p <= 0) 3390 errx(EX_DATAERR, "0 < max_p <= 1"); 3391 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 3392 } 3393 ac--; av++; 3394 break; 3395 3396 case TOK_DROPTAIL: 3397 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 3398 break; 3399 3400 case TOK_BW: 3401 NEED1("bw needs bandwidth or interface\n"); 3402 if (do_pipe != 1) 3403 errx(EX_DATAERR, "bandwidth only valid for pipes"); 3404 /* 3405 * set clocking interface or bandwidth value 3406 */ 3407 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 3408 int l = sizeof(p.if_name)-1; 3409 /* interface name */ 3410 strncpy(p.if_name, av[0], l); 3411 p.if_name[l] = '\0'; 3412 p.bandwidth = 0; 3413 } else { 3414 p.if_name[0] = '\0'; 3415 p.bandwidth = strtoul(av[0], &end, 0); 3416 if (*end == 'K' || *end == 'k') { 3417 end++; 3418 p.bandwidth *= 1000; 3419 } else if (*end == 'M') { 3420 end++; 3421 p.bandwidth *= 1000000; 3422 } 3423 if (*end == 'B' || 3424 _substrcmp2(end, "by", "bytes") == 0) 3425 p.bandwidth *= 8; 3426 if (p.bandwidth < 0) 3427 errx(EX_DATAERR, "bandwidth too large"); 3428 } 3429 ac--; av++; 3430 break; 3431 3432 case TOK_DELAY: 3433 if (do_pipe != 1) 3434 errx(EX_DATAERR, "delay only valid for pipes"); 3435 NEED1("delay needs argument 0..10000ms\n"); 3436 p.delay = strtoul(av[0], NULL, 0); 3437 ac--; av++; 3438 break; 3439 3440 case TOK_WEIGHT: 3441 if (do_pipe == 1) 3442 errx(EX_DATAERR,"weight only valid for queues"); 3443 NEED1("weight needs argument 0..100\n"); 3444 p.fs.weight = strtoul(av[0], &end, 0); 3445 ac--; av++; 3446 break; 3447 3448 case TOK_PIPE: 3449 if (do_pipe == 1) 3450 errx(EX_DATAERR,"pipe only valid for queues"); 3451 NEED1("pipe needs pipe_number\n"); 3452 p.fs.parent_nr = strtoul(av[0], &end, 0); 3453 ac--; av++; 3454 break; 3455 3456 default: 3457 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3458 } 3459 } 3460 if (do_pipe == 1) { 3461 if (p.pipe_nr == 0) 3462 errx(EX_DATAERR, "pipe_nr must be > 0"); 3463 if (p.delay > 10000) 3464 errx(EX_DATAERR, "delay must be < 10000"); 3465 } else { /* do_pipe == 2, queue */ 3466 if (p.fs.parent_nr == 0) 3467 errx(EX_DATAERR, "pipe must be > 0"); 3468 if (p.fs.weight >100) 3469 errx(EX_DATAERR, "weight must be <= 100"); 3470 } 3471 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 3472 if (p.fs.qsize > 1024*1024) 3473 errx(EX_DATAERR, "queue size must be < 1MB"); 3474 } else { 3475 if (p.fs.qsize > 100) 3476 errx(EX_DATAERR, "2 <= queue size <= 100"); 3477 } 3478 if (p.fs.flags_fs & DN_IS_RED) { 3479 size_t len; 3480 int lookup_depth, avg_pkt_size; 3481 double s, idle, weight, w_q; 3482 struct clockinfo ck; 3483 int t; 3484 3485 if (p.fs.min_th >= p.fs.max_th) 3486 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 3487 p.fs.min_th, p.fs.max_th); 3488 if (p.fs.max_th == 0) 3489 errx(EX_DATAERR, "max_th must be > 0"); 3490 3491 len = sizeof(int); 3492 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 3493 &lookup_depth, &len, NULL, 0) == -1) 3494 3495 errx(1, "sysctlbyname(\"%s\")", 3496 "net.inet.ip.dummynet.red_lookup_depth"); 3497 if (lookup_depth == 0) 3498 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 3499 " must be greater than zero"); 3500 3501 len = sizeof(int); 3502 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 3503 &avg_pkt_size, &len, NULL, 0) == -1) 3504 3505 errx(1, "sysctlbyname(\"%s\")", 3506 "net.inet.ip.dummynet.red_avg_pkt_size"); 3507 if (avg_pkt_size == 0) 3508 errx(EX_DATAERR, 3509 "net.inet.ip.dummynet.red_avg_pkt_size must" 3510 " be greater than zero"); 3511 3512 len = sizeof(struct clockinfo); 3513 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 3514 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 3515 3516 /* 3517 * Ticks needed for sending a medium-sized packet. 3518 * Unfortunately, when we are configuring a WF2Q+ queue, we 3519 * do not have bandwidth information, because that is stored 3520 * in the parent pipe, and also we have multiple queues 3521 * competing for it. So we set s=0, which is not very 3522 * correct. But on the other hand, why do we want RED with 3523 * WF2Q+ ? 3524 */ 3525 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 3526 s = 0; 3527 else 3528 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 3529 3530 /* 3531 * max idle time (in ticks) before avg queue size becomes 0. 3532 * NOTA: (3/w_q) is approx the value x so that 3533 * (1-w_q)^x < 10^-3. 3534 */ 3535 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 3536 idle = s * 3. / w_q; 3537 p.fs.lookup_step = (int)idle / lookup_depth; 3538 if (!p.fs.lookup_step) 3539 p.fs.lookup_step = 1; 3540 weight = 1 - w_q; 3541 for (t = p.fs.lookup_step; t > 0; --t) 3542 weight *= weight; 3543 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 3544 } 3545 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 3546 if (i) 3547 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 3548 } 3549 3550 static void 3551 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 3552 { 3553 int i, l; 3554 3555 for (i=0; i<6; i++) 3556 addr[i] = mask[i] = 0; 3557 if (strcmp(p, "any") == 0) 3558 return; 3559 3560 for (i=0; *p && i<6;i++, p++) { 3561 addr[i] = strtol(p, &p, 16); 3562 if (*p != ':') /* we start with the mask */ 3563 break; 3564 } 3565 if (*p == '/') { /* mask len */ 3566 l = strtol(p+1, &p, 0); 3567 for (i=0; l>0; l -=8, i++) 3568 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 3569 } else if (*p == '&') { /* mask */ 3570 for (i=0, p++; *p && i<6;i++, p++) { 3571 mask[i] = strtol(p, &p, 16); 3572 if (*p != ':') 3573 break; 3574 } 3575 } else if (*p == '\0') { 3576 for (i=0; i<6; i++) 3577 mask[i] = 0xff; 3578 } 3579 for (i=0; i<6; i++) 3580 addr[i] &= mask[i]; 3581 } 3582 3583 /* 3584 * helper function, updates the pointer to cmd with the length 3585 * of the current command, and also cleans up the first word of 3586 * the new command in case it has been clobbered before. 3587 */ 3588 static ipfw_insn * 3589 next_cmd(ipfw_insn *cmd) 3590 { 3591 cmd += F_LEN(cmd); 3592 bzero(cmd, sizeof(*cmd)); 3593 return cmd; 3594 } 3595 3596 /* 3597 * Takes arguments and copies them into a comment 3598 */ 3599 static void 3600 fill_comment(ipfw_insn *cmd, int ac, char **av) 3601 { 3602 int i, l; 3603 char *p = (char *)(cmd + 1); 3604 3605 cmd->opcode = O_NOP; 3606 cmd->len = (cmd->len & (F_NOT | F_OR)); 3607 3608 /* Compute length of comment string. */ 3609 for (i = 0, l = 0; i < ac; i++) 3610 l += strlen(av[i]) + 1; 3611 if (l == 0) 3612 return; 3613 if (l > 84) 3614 errx(EX_DATAERR, 3615 "comment too long (max 80 chars)"); 3616 l = 1 + (l+3)/4; 3617 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3618 for (i = 0; i < ac; i++) { 3619 strcpy(p, av[i]); 3620 p += strlen(av[i]); 3621 *p++ = ' '; 3622 } 3623 *(--p) = '\0'; 3624 } 3625 3626 /* 3627 * A function to fill simple commands of size 1. 3628 * Existing flags are preserved. 3629 */ 3630 static void 3631 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3632 { 3633 cmd->opcode = opcode; 3634 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3635 cmd->arg1 = arg; 3636 } 3637 3638 /* 3639 * Fetch and add the MAC address and type, with masks. This generates one or 3640 * two microinstructions, and returns the pointer to the last one. 3641 */ 3642 static ipfw_insn * 3643 add_mac(ipfw_insn *cmd, int ac, char *av[]) 3644 { 3645 ipfw_insn_mac *mac; 3646 3647 if (ac < 2) 3648 errx(EX_DATAERR, "MAC dst src"); 3649 3650 cmd->opcode = O_MACADDR2; 3651 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3652 3653 mac = (ipfw_insn_mac *)cmd; 3654 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3655 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 3656 return cmd; 3657 } 3658 3659 static ipfw_insn * 3660 add_mactype(ipfw_insn *cmd, int ac, char *av) 3661 { 3662 if (ac < 1) 3663 errx(EX_DATAERR, "missing MAC type"); 3664 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3665 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 3666 cmd->opcode = O_MAC_TYPE; 3667 return cmd; 3668 } else 3669 return NULL; 3670 } 3671 3672 static ipfw_insn * 3673 add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3674 { 3675 struct protoent *pe; 3676 char *ep; 3677 int proto; 3678 3679 proto = strtol(av, &ep, 10); 3680 if (*ep != '\0' || proto <= 0) { 3681 if ((pe = getprotobyname(av)) == NULL) 3682 return NULL; 3683 proto = pe->p_proto; 3684 } 3685 3686 fill_cmd(cmd, O_PROTO, 0, proto); 3687 *protop = proto; 3688 return cmd; 3689 } 3690 3691 static ipfw_insn * 3692 add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3693 { 3694 u_char proto = IPPROTO_IP; 3695 3696 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3697 ; /* do not set O_IP4 nor O_IP6 */ 3698 else if (strcmp(av, "ip4") == 0) 3699 /* explicit "just IPv4" rule */ 3700 fill_cmd(cmd, O_IP4, 0, 0); 3701 else if (strcmp(av, "ip6") == 0) { 3702 /* explicit "just IPv6" rule */ 3703 proto = IPPROTO_IPV6; 3704 fill_cmd(cmd, O_IP6, 0, 0); 3705 } else 3706 return add_proto0(cmd, av, protop); 3707 3708 *protop = proto; 3709 return cmd; 3710 } 3711 3712 static ipfw_insn * 3713 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3714 { 3715 u_char proto = IPPROTO_IP; 3716 3717 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3718 ; /* do not set O_IP4 nor O_IP6 */ 3719 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3720 /* explicit "just IPv4" rule */ 3721 fill_cmd(cmd, O_IP4, 0, 0); 3722 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3723 /* explicit "just IPv6" rule */ 3724 proto = IPPROTO_IPV6; 3725 fill_cmd(cmd, O_IP6, 0, 0); 3726 } else 3727 return add_proto0(cmd, av, protop); 3728 3729 *protop = proto; 3730 return cmd; 3731 } 3732 3733 static ipfw_insn * 3734 add_srcip(ipfw_insn *cmd, char *av) 3735 { 3736 fill_ip((ipfw_insn_ip *)cmd, av); 3737 if (cmd->opcode == O_IP_DST_SET) /* set */ 3738 cmd->opcode = O_IP_SRC_SET; 3739 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3740 cmd->opcode = O_IP_SRC_LOOKUP; 3741 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3742 cmd->opcode = O_IP_SRC_ME; 3743 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3744 cmd->opcode = O_IP_SRC; 3745 else /* addr/mask */ 3746 cmd->opcode = O_IP_SRC_MASK; 3747 return cmd; 3748 } 3749 3750 static ipfw_insn * 3751 add_dstip(ipfw_insn *cmd, char *av) 3752 { 3753 fill_ip((ipfw_insn_ip *)cmd, av); 3754 if (cmd->opcode == O_IP_DST_SET) /* set */ 3755 ; 3756 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3757 ; 3758 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3759 cmd->opcode = O_IP_DST_ME; 3760 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3761 cmd->opcode = O_IP_DST; 3762 else /* addr/mask */ 3763 cmd->opcode = O_IP_DST_MASK; 3764 return cmd; 3765 } 3766 3767 static ipfw_insn * 3768 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 3769 { 3770 if (_substrcmp(av, "any") == 0) { 3771 return NULL; 3772 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 3773 /* XXX todo: check that we have a protocol with ports */ 3774 cmd->opcode = opcode; 3775 return cmd; 3776 } 3777 return NULL; 3778 } 3779 3780 static ipfw_insn * 3781 add_src(ipfw_insn *cmd, char *av, u_char proto) 3782 { 3783 struct in6_addr a; 3784 char *host, *ch; 3785 ipfw_insn *ret = NULL; 3786 3787 if ((host = strdup(av)) == NULL) 3788 return NULL; 3789 if ((ch = strrchr(host, '/')) != NULL) 3790 *ch = '\0'; 3791 3792 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3793 inet_pton(AF_INET6, host, &a)) 3794 ret = add_srcip6(cmd, av); 3795 /* XXX: should check for IPv4, not !IPv6 */ 3796 if ((ret == NULL) && proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3797 !inet_pton(AF_INET6, host, &a)) 3798 ret = add_srcip(cmd, av); 3799 if ((ret == NULL) && strcmp(av, "any") != 0) 3800 ret = cmd; 3801 3802 free(host); 3803 return ret; 3804 } 3805 3806 static ipfw_insn * 3807 add_dst(ipfw_insn *cmd, char *av, u_char proto) 3808 { 3809 struct in6_addr a; 3810 char *host, *ch; 3811 ipfw_insn *ret = NULL; 3812 3813 if ((host = strdup(av)) == NULL) 3814 return NULL; 3815 if ((ch = strrchr(host, '/')) != NULL) 3816 *ch = '\0'; 3817 3818 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3819 inet_pton(AF_INET6, host, &a)) 3820 ret = add_dstip6(cmd, av); 3821 /* XXX: should check for IPv4, not !IPv6 */ 3822 if ((ret == NULL) && proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3823 !inet_pton(AF_INET6, av, &a)) 3824 ret = add_dstip(cmd, av); 3825 if ((ret == NULL) && strcmp(av, "any") != 0) 3826 ret = cmd; 3827 3828 free(host); 3829 return ret; 3830 } 3831 3832 /* 3833 * Parse arguments and assemble the microinstructions which make up a rule. 3834 * Rules are added into the 'rulebuf' and then copied in the correct order 3835 * into the actual rule. 3836 * 3837 * The syntax for a rule starts with the action, followed by 3838 * optional action parameters, and the various match patterns. 3839 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3840 * (generated if the rule includes a keep-state option), then the 3841 * various match patterns, log/altq actions, and the actual action. 3842 * 3843 */ 3844 static void 3845 add(int ac, char *av[]) 3846 { 3847 /* 3848 * rules are added into the 'rulebuf' and then copied in 3849 * the correct order into the actual rule. 3850 * Some things that need to go out of order (prob, action etc.) 3851 * go into actbuf[]. 3852 */ 3853 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3854 3855 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3856 ipfw_insn *first_cmd; /* first match pattern */ 3857 3858 struct ip_fw *rule; 3859 3860 /* 3861 * various flags used to record that we entered some fields. 3862 */ 3863 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3864 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3865 size_t len; 3866 3867 int i; 3868 3869 int open_par = 0; /* open parenthesis ( */ 3870 3871 /* proto is here because it is used to fetch ports */ 3872 u_char proto = IPPROTO_IP; /* default protocol */ 3873 3874 double match_prob = 1; /* match probability, default is always match */ 3875 3876 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3877 bzero(cmdbuf, sizeof(cmdbuf)); 3878 bzero(rulebuf, sizeof(rulebuf)); 3879 3880 rule = (struct ip_fw *)rulebuf; 3881 cmd = (ipfw_insn *)cmdbuf; 3882 action = (ipfw_insn *)actbuf; 3883 3884 av++; ac--; 3885 3886 /* [rule N] -- Rule number optional */ 3887 if (ac && isdigit(**av)) { 3888 rule->rulenum = atoi(*av); 3889 av++; 3890 ac--; 3891 } 3892 3893 /* [set N] -- set number (0..RESVD_SET), optional */ 3894 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3895 int set = strtoul(av[1], NULL, 10); 3896 if (set < 0 || set > RESVD_SET) 3897 errx(EX_DATAERR, "illegal set %s", av[1]); 3898 rule->set = set; 3899 av += 2; ac -= 2; 3900 } 3901 3902 /* [prob D] -- match probability, optional */ 3903 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3904 match_prob = strtod(av[1], NULL); 3905 3906 if (match_prob <= 0 || match_prob > 1) 3907 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3908 av += 2; ac -= 2; 3909 } 3910 3911 /* action -- mandatory */ 3912 NEED1("missing action"); 3913 i = match_token(rule_actions, *av); 3914 ac--; av++; 3915 action->len = 1; /* default */ 3916 switch(i) { 3917 case TOK_CHECKSTATE: 3918 have_state = action; 3919 action->opcode = O_CHECK_STATE; 3920 break; 3921 3922 case TOK_ACCEPT: 3923 action->opcode = O_ACCEPT; 3924 break; 3925 3926 case TOK_DENY: 3927 action->opcode = O_DENY; 3928 action->arg1 = 0; 3929 break; 3930 3931 case TOK_REJECT: 3932 action->opcode = O_REJECT; 3933 action->arg1 = ICMP_UNREACH_HOST; 3934 break; 3935 3936 case TOK_RESET: 3937 action->opcode = O_REJECT; 3938 action->arg1 = ICMP_REJECT_RST; 3939 break; 3940 3941 case TOK_RESET6: 3942 action->opcode = O_UNREACH6; 3943 action->arg1 = ICMP6_UNREACH_RST; 3944 break; 3945 3946 case TOK_UNREACH: 3947 action->opcode = O_REJECT; 3948 NEED1("missing reject code"); 3949 fill_reject_code(&action->arg1, *av); 3950 ac--; av++; 3951 break; 3952 3953 case TOK_UNREACH6: 3954 action->opcode = O_UNREACH6; 3955 NEED1("missing unreach code"); 3956 fill_unreach6_code(&action->arg1, *av); 3957 ac--; av++; 3958 break; 3959 3960 case TOK_COUNT: 3961 action->opcode = O_COUNT; 3962 break; 3963 3964 case TOK_QUEUE: 3965 action->opcode = O_QUEUE; 3966 goto chkarg; 3967 case TOK_PIPE: 3968 action->opcode = O_PIPE; 3969 goto chkarg; 3970 case TOK_SKIPTO: 3971 action->opcode = O_SKIPTO; 3972 goto chkarg; 3973 case TOK_NETGRAPH: 3974 action->opcode = O_NETGRAPH; 3975 goto chkarg; 3976 case TOK_NGTEE: 3977 action->opcode = O_NGTEE; 3978 goto chkarg; 3979 case TOK_DIVERT: 3980 action->opcode = O_DIVERT; 3981 goto chkarg; 3982 case TOK_TEE: 3983 action->opcode = O_TEE; 3984 chkarg: 3985 if (!ac) 3986 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3987 if (isdigit(**av)) { 3988 action->arg1 = strtoul(*av, NULL, 10); 3989 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3990 errx(EX_DATAERR, "illegal argument for %s", 3991 *(av - 1)); 3992 } else if (_substrcmp(*av, TABLEARG) == 0) { 3993 action->arg1 = IP_FW_TABLEARG; 3994 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3995 struct servent *s; 3996 setservent(1); 3997 s = getservbyname(av[0], "divert"); 3998 if (s != NULL) 3999 action->arg1 = ntohs(s->s_port); 4000 else 4001 errx(EX_DATAERR, "illegal divert/tee port"); 4002 } else 4003 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 4004 ac--; av++; 4005 break; 4006 4007 case TOK_FORWARD: { 4008 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 4009 char *s, *end; 4010 4011 NEED1("missing forward address[:port]"); 4012 4013 action->opcode = O_FORWARD_IP; 4014 action->len = F_INSN_SIZE(ipfw_insn_sa); 4015 4016 p->sa.sin_len = sizeof(struct sockaddr_in); 4017 p->sa.sin_family = AF_INET; 4018 p->sa.sin_port = 0; 4019 /* 4020 * locate the address-port separator (':' or ',') 4021 */ 4022 s = strchr(*av, ':'); 4023 if (s == NULL) 4024 s = strchr(*av, ','); 4025 if (s != NULL) { 4026 *(s++) = '\0'; 4027 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 4028 if (s == end) 4029 errx(EX_DATAERR, 4030 "illegal forwarding port ``%s''", s); 4031 p->sa.sin_port = (u_short)i; 4032 } 4033 lookup_host(*av, &(p->sa.sin_addr)); 4034 } 4035 ac--; av++; 4036 break; 4037 4038 case TOK_COMMENT: 4039 /* pretend it is a 'count' rule followed by the comment */ 4040 action->opcode = O_COUNT; 4041 ac++; av--; /* go back... */ 4042 break; 4043 4044 default: 4045 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 4046 } 4047 action = next_cmd(action); 4048 4049 /* 4050 * [altq queuename] -- altq tag, optional 4051 * [log [logamount N]] -- log, optional 4052 * 4053 * If they exist, it go first in the cmdbuf, but then it is 4054 * skipped in the copy section to the end of the buffer. 4055 */ 4056 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 4057 ac--; av++; 4058 switch (i) { 4059 case TOK_LOG: 4060 { 4061 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4062 int l; 4063 4064 if (have_log) 4065 errx(EX_DATAERR, 4066 "log cannot be specified more than once"); 4067 have_log = (ipfw_insn *)c; 4068 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4069 cmd->opcode = O_LOG; 4070 if (ac && _substrcmp(*av, "logamount") == 0) { 4071 ac--; av++; 4072 NEED1("logamount requires argument"); 4073 l = atoi(*av); 4074 if (l < 0) 4075 errx(EX_DATAERR, 4076 "logamount must be positive"); 4077 c->max_log = l; 4078 ac--; av++; 4079 } else { 4080 len = sizeof(c->max_log); 4081 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4082 &c->max_log, &len, NULL, 0) == -1) 4083 errx(1, "sysctlbyname(\"%s\")", 4084 "net.inet.ip.fw.verbose_limit"); 4085 } 4086 } 4087 break; 4088 4089 case TOK_ALTQ: 4090 { 4091 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4092 4093 NEED1("missing altq queue name"); 4094 if (have_altq) 4095 errx(EX_DATAERR, 4096 "altq cannot be specified more than once"); 4097 have_altq = (ipfw_insn *)a; 4098 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4099 cmd->opcode = O_ALTQ; 4100 fill_altq_qid(&a->qid, *av); 4101 ac--; av++; 4102 } 4103 break; 4104 4105 case TOK_TAG: 4106 case TOK_UNTAG: { 4107 uint16_t tag; 4108 4109 if (have_tag) 4110 errx(EX_USAGE, "tag and untag cannot be " 4111 "specified more than once"); 4112 GET_UINT_ARG(tag, 1, 65534, i, rule_action_params); 4113 have_tag = cmd; 4114 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4115 ac--; av++; 4116 break; 4117 } 4118 4119 default: 4120 abort(); 4121 } 4122 cmd = next_cmd(cmd); 4123 } 4124 4125 if (have_state) /* must be a check-state, we are done */ 4126 goto done; 4127 4128 #define OR_START(target) \ 4129 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 4130 if (open_par) \ 4131 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4132 prev = NULL; \ 4133 open_par = 1; \ 4134 if ( (av[0])[1] == '\0') { \ 4135 ac--; av++; \ 4136 } else \ 4137 (*av)++; \ 4138 } \ 4139 target: \ 4140 4141 4142 #define CLOSE_PAR \ 4143 if (open_par) { \ 4144 if (ac && ( \ 4145 strcmp(*av, ")") == 0 || \ 4146 strcmp(*av, "}") == 0)) { \ 4147 prev = NULL; \ 4148 open_par = 0; \ 4149 ac--; av++; \ 4150 } else \ 4151 errx(EX_USAGE, "missing \")\"\n"); \ 4152 } 4153 4154 #define NOT_BLOCK \ 4155 if (ac && _substrcmp(*av, "not") == 0) { \ 4156 if (cmd->len & F_NOT) \ 4157 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4158 cmd->len |= F_NOT; \ 4159 ac--; av++; \ 4160 } 4161 4162 #define OR_BLOCK(target) \ 4163 if (ac && _substrcmp(*av, "or") == 0) { \ 4164 if (prev == NULL || open_par == 0) \ 4165 errx(EX_DATAERR, "invalid OR block"); \ 4166 prev->len |= F_OR; \ 4167 ac--; av++; \ 4168 goto target; \ 4169 } \ 4170 CLOSE_PAR; 4171 4172 first_cmd = cmd; 4173 4174 #if 0 4175 /* 4176 * MAC addresses, optional. 4177 * If we have this, we skip the part "proto from src to dst" 4178 * and jump straight to the option parsing. 4179 */ 4180 NOT_BLOCK; 4181 NEED1("missing protocol"); 4182 if (_substrcmp(*av, "MAC") == 0 || 4183 _substrcmp(*av, "mac") == 0) { 4184 ac--; av++; /* the "MAC" keyword */ 4185 add_mac(cmd, ac, av); /* exits in case of errors */ 4186 cmd = next_cmd(cmd); 4187 ac -= 2; av += 2; /* dst-mac and src-mac */ 4188 NOT_BLOCK; 4189 NEED1("missing mac type"); 4190 if (add_mactype(cmd, ac, av[0])) 4191 cmd = next_cmd(cmd); 4192 ac--; av++; /* any or mac-type */ 4193 goto read_options; 4194 } 4195 #endif 4196 4197 /* 4198 * protocol, mandatory 4199 */ 4200 OR_START(get_proto); 4201 NOT_BLOCK; 4202 NEED1("missing protocol"); 4203 if (add_proto_compat(cmd, *av, &proto)) { 4204 av++; ac--; 4205 if (F_LEN(cmd) != 0) { 4206 prev = cmd; 4207 cmd = next_cmd(cmd); 4208 } 4209 } else if (first_cmd != cmd) { 4210 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4211 } else 4212 goto read_options; 4213 OR_BLOCK(get_proto); 4214 4215 /* 4216 * "from", mandatory 4217 */ 4218 if (!ac || _substrcmp(*av, "from") != 0) 4219 errx(EX_USAGE, "missing ``from''"); 4220 ac--; av++; 4221 4222 /* 4223 * source IP, mandatory 4224 */ 4225 OR_START(source_ip); 4226 NOT_BLOCK; /* optional "not" */ 4227 NEED1("missing source address"); 4228 if (add_src(cmd, *av, proto)) { 4229 ac--; av++; 4230 if (F_LEN(cmd) != 0) { /* ! any */ 4231 prev = cmd; 4232 cmd = next_cmd(cmd); 4233 } 4234 } else 4235 errx(EX_USAGE, "bad source address %s", *av); 4236 OR_BLOCK(source_ip); 4237 4238 /* 4239 * source ports, optional 4240 */ 4241 NOT_BLOCK; /* optional "not" */ 4242 if (ac) { 4243 if (_substrcmp(*av, "any") == 0 || 4244 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4245 ac--; av++; 4246 if (F_LEN(cmd) != 0) 4247 cmd = next_cmd(cmd); 4248 } 4249 } 4250 4251 /* 4252 * "to", mandatory 4253 */ 4254 if (!ac || _substrcmp(*av, "to") != 0) 4255 errx(EX_USAGE, "missing ``to''"); 4256 av++; ac--; 4257 4258 /* 4259 * destination, mandatory 4260 */ 4261 OR_START(dest_ip); 4262 NOT_BLOCK; /* optional "not" */ 4263 NEED1("missing dst address"); 4264 if (add_dst(cmd, *av, proto)) { 4265 ac--; av++; 4266 if (F_LEN(cmd) != 0) { /* ! any */ 4267 prev = cmd; 4268 cmd = next_cmd(cmd); 4269 } 4270 } else 4271 errx( EX_USAGE, "bad destination address %s", *av); 4272 OR_BLOCK(dest_ip); 4273 4274 /* 4275 * dest. ports, optional 4276 */ 4277 NOT_BLOCK; /* optional "not" */ 4278 if (ac) { 4279 if (_substrcmp(*av, "any") == 0 || 4280 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4281 ac--; av++; 4282 if (F_LEN(cmd) != 0) 4283 cmd = next_cmd(cmd); 4284 } 4285 } 4286 4287 read_options: 4288 if (ac && first_cmd == cmd) { 4289 /* 4290 * nothing specified so far, store in the rule to ease 4291 * printout later. 4292 */ 4293 rule->_pad = 1; 4294 } 4295 prev = NULL; 4296 while (ac) { 4297 char *s; 4298 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4299 4300 s = *av; 4301 cmd32 = (ipfw_insn_u32 *)cmd; 4302 4303 if (*s == '!') { /* alternate syntax for NOT */ 4304 if (cmd->len & F_NOT) 4305 errx(EX_USAGE, "double \"not\" not allowed\n"); 4306 cmd->len = F_NOT; 4307 s++; 4308 } 4309 i = match_token(rule_options, s); 4310 ac--; av++; 4311 switch(i) { 4312 case TOK_NOT: 4313 if (cmd->len & F_NOT) 4314 errx(EX_USAGE, "double \"not\" not allowed\n"); 4315 cmd->len = F_NOT; 4316 break; 4317 4318 case TOK_OR: 4319 if (open_par == 0 || prev == NULL) 4320 errx(EX_USAGE, "invalid \"or\" block\n"); 4321 prev->len |= F_OR; 4322 break; 4323 4324 case TOK_STARTBRACE: 4325 if (open_par) 4326 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4327 open_par = 1; 4328 break; 4329 4330 case TOK_ENDBRACE: 4331 if (!open_par) 4332 errx(EX_USAGE, "+missing \")\"\n"); 4333 open_par = 0; 4334 prev = NULL; 4335 break; 4336 4337 case TOK_IN: 4338 fill_cmd(cmd, O_IN, 0, 0); 4339 break; 4340 4341 case TOK_OUT: 4342 cmd->len ^= F_NOT; /* toggle F_NOT */ 4343 fill_cmd(cmd, O_IN, 0, 0); 4344 break; 4345 4346 case TOK_DIVERTED: 4347 fill_cmd(cmd, O_DIVERTED, 0, 3); 4348 break; 4349 4350 case TOK_DIVERTEDLOOPBACK: 4351 fill_cmd(cmd, O_DIVERTED, 0, 1); 4352 break; 4353 4354 case TOK_DIVERTEDOUTPUT: 4355 fill_cmd(cmd, O_DIVERTED, 0, 2); 4356 break; 4357 4358 case TOK_FRAG: 4359 fill_cmd(cmd, O_FRAG, 0, 0); 4360 break; 4361 4362 case TOK_LAYER2: 4363 fill_cmd(cmd, O_LAYER2, 0, 0); 4364 break; 4365 4366 case TOK_XMIT: 4367 case TOK_RECV: 4368 case TOK_VIA: 4369 NEED1("recv, xmit, via require interface name" 4370 " or address"); 4371 fill_iface((ipfw_insn_if *)cmd, av[0]); 4372 ac--; av++; 4373 if (F_LEN(cmd) == 0) /* not a valid address */ 4374 break; 4375 if (i == TOK_XMIT) 4376 cmd->opcode = O_XMIT; 4377 else if (i == TOK_RECV) 4378 cmd->opcode = O_RECV; 4379 else if (i == TOK_VIA) 4380 cmd->opcode = O_VIA; 4381 break; 4382 4383 case TOK_ICMPTYPES: 4384 NEED1("icmptypes requires list of types"); 4385 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4386 av++; ac--; 4387 break; 4388 4389 case TOK_ICMP6TYPES: 4390 NEED1("icmptypes requires list of types"); 4391 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 4392 av++; ac--; 4393 break; 4394 4395 case TOK_IPTTL: 4396 NEED1("ipttl requires TTL"); 4397 if (strpbrk(*av, "-,")) { 4398 if (!add_ports(cmd, *av, 0, O_IPTTL)) 4399 errx(EX_DATAERR, "invalid ipttl %s", *av); 4400 } else 4401 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4402 ac--; av++; 4403 break; 4404 4405 case TOK_IPID: 4406 NEED1("ipid requires id"); 4407 if (strpbrk(*av, "-,")) { 4408 if (!add_ports(cmd, *av, 0, O_IPID)) 4409 errx(EX_DATAERR, "invalid ipid %s", *av); 4410 } else 4411 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4412 ac--; av++; 4413 break; 4414 4415 case TOK_IPLEN: 4416 NEED1("iplen requires length"); 4417 if (strpbrk(*av, "-,")) { 4418 if (!add_ports(cmd, *av, 0, O_IPLEN)) 4419 errx(EX_DATAERR, "invalid ip len %s", *av); 4420 } else 4421 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4422 ac--; av++; 4423 break; 4424 4425 case TOK_IPVER: 4426 NEED1("ipver requires version"); 4427 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4428 ac--; av++; 4429 break; 4430 4431 case TOK_IPPRECEDENCE: 4432 NEED1("ipprecedence requires value"); 4433 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4434 (strtoul(*av, NULL, 0) & 7) << 5); 4435 ac--; av++; 4436 break; 4437 4438 case TOK_IPOPTS: 4439 NEED1("missing argument for ipoptions"); 4440 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 4441 ac--; av++; 4442 break; 4443 4444 case TOK_IPTOS: 4445 NEED1("missing argument for iptos"); 4446 fill_flags(cmd, O_IPTOS, f_iptos, *av); 4447 ac--; av++; 4448 break; 4449 4450 case TOK_UID: 4451 NEED1("uid requires argument"); 4452 { 4453 char *end; 4454 uid_t uid; 4455 struct passwd *pwd; 4456 4457 cmd->opcode = O_UID; 4458 uid = strtoul(*av, &end, 0); 4459 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4460 if (pwd == NULL) 4461 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4462 cmd32->d[0] = pwd->pw_uid; 4463 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4464 ac--; av++; 4465 } 4466 break; 4467 4468 case TOK_GID: 4469 NEED1("gid requires argument"); 4470 { 4471 char *end; 4472 gid_t gid; 4473 struct group *grp; 4474 4475 cmd->opcode = O_GID; 4476 gid = strtoul(*av, &end, 0); 4477 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4478 if (grp == NULL) 4479 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4480 cmd32->d[0] = grp->gr_gid; 4481 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4482 ac--; av++; 4483 } 4484 break; 4485 4486 case TOK_JAIL: 4487 NEED1("jail requires argument"); 4488 { 4489 char *end; 4490 int jid; 4491 4492 cmd->opcode = O_JAIL; 4493 jid = (int)strtol(*av, &end, 0); 4494 if (jid < 0 || *end != '\0') 4495 errx(EX_DATAERR, "jail requires prison ID"); 4496 cmd32->d[0] = (uint32_t)jid; 4497 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4498 ac--; av++; 4499 } 4500 break; 4501 4502 case TOK_ESTAB: 4503 fill_cmd(cmd, O_ESTAB, 0, 0); 4504 break; 4505 4506 case TOK_SETUP: 4507 fill_cmd(cmd, O_TCPFLAGS, 0, 4508 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4509 break; 4510 4511 case TOK_TCPDATALEN: 4512 NEED1("tcpdatalen requires length"); 4513 if (strpbrk(*av, "-,")) { 4514 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 4515 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4516 } else 4517 fill_cmd(cmd, O_TCPDATALEN, 0, 4518 strtoul(*av, NULL, 0)); 4519 ac--; av++; 4520 break; 4521 4522 case TOK_TCPOPTS: 4523 NEED1("missing argument for tcpoptions"); 4524 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 4525 ac--; av++; 4526 break; 4527 4528 case TOK_TCPSEQ: 4529 case TOK_TCPACK: 4530 NEED1("tcpseq/tcpack requires argument"); 4531 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4532 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4533 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4534 ac--; av++; 4535 break; 4536 4537 case TOK_TCPWIN: 4538 NEED1("tcpwin requires length"); 4539 fill_cmd(cmd, O_TCPWIN, 0, 4540 htons(strtoul(*av, NULL, 0))); 4541 ac--; av++; 4542 break; 4543 4544 case TOK_TCPFLAGS: 4545 NEED1("missing argument for tcpflags"); 4546 cmd->opcode = O_TCPFLAGS; 4547 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 4548 ac--; av++; 4549 break; 4550 4551 case TOK_KEEPSTATE: 4552 if (open_par) 4553 errx(EX_USAGE, "keep-state cannot be part " 4554 "of an or block"); 4555 if (have_state) 4556 errx(EX_USAGE, "only one of keep-state " 4557 "and limit is allowed"); 4558 have_state = cmd; 4559 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4560 break; 4561 4562 case TOK_LIMIT: { 4563 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4564 int val; 4565 4566 if (open_par) 4567 errx(EX_USAGE, 4568 "limit cannot be part of an or block"); 4569 if (have_state) 4570 errx(EX_USAGE, "only one of keep-state and" 4571 "limit is allowed"); 4572 have_state = cmd; 4573 4574 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4575 cmd->opcode = O_LIMIT; 4576 c->limit_mask = c->conn_limit = 0; 4577 4578 while (ac > 0) { 4579 if ((val = match_token(limit_masks, *av)) <= 0) 4580 break; 4581 c->limit_mask |= val; 4582 ac--; av++; 4583 } 4584 4585 if (c->limit_mask == 0) 4586 errx(EX_USAGE, "limit: missing limit mask"); 4587 4588 GET_UINT_ARG(c->conn_limit, 1, 65534, TOK_LIMIT, 4589 rule_options); 4590 4591 ac--; av++; 4592 break; 4593 } 4594 4595 case TOK_PROTO: 4596 NEED1("missing protocol"); 4597 if (add_proto(cmd, *av, &proto)) { 4598 ac--; av++; 4599 } else 4600 errx(EX_DATAERR, "invalid protocol ``%s''", 4601 *av); 4602 break; 4603 4604 case TOK_SRCIP: 4605 NEED1("missing source IP"); 4606 if (add_srcip(cmd, *av)) { 4607 ac--; av++; 4608 } 4609 break; 4610 4611 case TOK_DSTIP: 4612 NEED1("missing destination IP"); 4613 if (add_dstip(cmd, *av)) { 4614 ac--; av++; 4615 } 4616 break; 4617 4618 case TOK_SRCIP6: 4619 NEED1("missing source IP6"); 4620 if (add_srcip6(cmd, *av)) { 4621 ac--; av++; 4622 } 4623 break; 4624 4625 case TOK_DSTIP6: 4626 NEED1("missing destination IP6"); 4627 if (add_dstip6(cmd, *av)) { 4628 ac--; av++; 4629 } 4630 break; 4631 4632 case TOK_SRCPORT: 4633 NEED1("missing source port"); 4634 if (_substrcmp(*av, "any") == 0 || 4635 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4636 ac--; av++; 4637 } else 4638 errx(EX_DATAERR, "invalid source port %s", *av); 4639 break; 4640 4641 case TOK_DSTPORT: 4642 NEED1("missing destination port"); 4643 if (_substrcmp(*av, "any") == 0 || 4644 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4645 ac--; av++; 4646 } else 4647 errx(EX_DATAERR, "invalid destination port %s", 4648 *av); 4649 break; 4650 4651 case TOK_MAC: 4652 if (add_mac(cmd, ac, av)) { 4653 ac -= 2; av += 2; 4654 } 4655 break; 4656 4657 case TOK_MACTYPE: 4658 NEED1("missing mac type"); 4659 if (!add_mactype(cmd, ac, *av)) 4660 errx(EX_DATAERR, "invalid mac type %s", *av); 4661 ac--; av++; 4662 break; 4663 4664 case TOK_VERREVPATH: 4665 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4666 break; 4667 4668 case TOK_VERSRCREACH: 4669 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4670 break; 4671 4672 case TOK_ANTISPOOF: 4673 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4674 break; 4675 4676 case TOK_IPSEC: 4677 fill_cmd(cmd, O_IPSEC, 0, 0); 4678 break; 4679 4680 case TOK_IPV6: 4681 fill_cmd(cmd, O_IP6, 0, 0); 4682 break; 4683 4684 case TOK_IPV4: 4685 fill_cmd(cmd, O_IP4, 0, 0); 4686 break; 4687 4688 case TOK_EXT6HDR: 4689 fill_ext6hdr( cmd, *av ); 4690 ac--; av++; 4691 break; 4692 4693 case TOK_FLOWID: 4694 if (proto != IPPROTO_IPV6 ) 4695 errx( EX_USAGE, "flow-id filter is active " 4696 "only for ipv6 protocol\n"); 4697 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 4698 ac--; av++; 4699 break; 4700 4701 case TOK_COMMENT: 4702 fill_comment(cmd, ac, av); 4703 av += ac; 4704 ac = 0; 4705 break; 4706 4707 case TOK_TAGGED: 4708 if (ac > 0 && strpbrk(*av, "-,")) { 4709 if (!add_ports(cmd, *av, 0, O_TAGGED)) 4710 errx(EX_DATAERR, "tagged: invalid tag" 4711 " list: %s", *av); 4712 } 4713 else { 4714 uint16_t tag; 4715 4716 GET_UINT_ARG(tag, 1, 65534, TOK_TAGGED, 4717 rule_options); 4718 fill_cmd(cmd, O_TAGGED, 0, tag); 4719 } 4720 ac--; av++; 4721 break; 4722 4723 default: 4724 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4725 } 4726 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4727 prev = cmd; 4728 cmd = next_cmd(cmd); 4729 } 4730 } 4731 4732 done: 4733 /* 4734 * Now copy stuff into the rule. 4735 * If we have a keep-state option, the first instruction 4736 * must be a PROBE_STATE (which is generated here). 4737 * If we have a LOG option, it was stored as the first command, 4738 * and now must be moved to the top of the action part. 4739 */ 4740 dst = (ipfw_insn *)rule->cmd; 4741 4742 /* 4743 * First thing to write into the command stream is the match probability. 4744 */ 4745 if (match_prob != 1) { /* 1 means always match */ 4746 dst->opcode = O_PROB; 4747 dst->len = 2; 4748 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4749 dst += dst->len; 4750 } 4751 4752 /* 4753 * generate O_PROBE_STATE if necessary 4754 */ 4755 if (have_state && have_state->opcode != O_CHECK_STATE) { 4756 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4757 dst = next_cmd(dst); 4758 } 4759 4760 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4761 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4762 i = F_LEN(src); 4763 4764 switch (src->opcode) { 4765 case O_LOG: 4766 case O_KEEP_STATE: 4767 case O_LIMIT: 4768 case O_ALTQ: 4769 case O_TAG: 4770 break; 4771 default: 4772 bcopy(src, dst, i * sizeof(uint32_t)); 4773 dst += i; 4774 } 4775 } 4776 4777 /* 4778 * put back the have_state command as last opcode 4779 */ 4780 if (have_state && have_state->opcode != O_CHECK_STATE) { 4781 i = F_LEN(have_state); 4782 bcopy(have_state, dst, i * sizeof(uint32_t)); 4783 dst += i; 4784 } 4785 /* 4786 * start action section 4787 */ 4788 rule->act_ofs = dst - rule->cmd; 4789 4790 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4791 if (have_log) { 4792 i = F_LEN(have_log); 4793 bcopy(have_log, dst, i * sizeof(uint32_t)); 4794 dst += i; 4795 } 4796 if (have_altq) { 4797 i = F_LEN(have_altq); 4798 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4799 dst += i; 4800 } 4801 if (have_tag) { 4802 i = F_LEN(have_tag); 4803 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4804 dst += i; 4805 } 4806 /* 4807 * copy all other actions 4808 */ 4809 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4810 i = F_LEN(src); 4811 bcopy(src, dst, i * sizeof(uint32_t)); 4812 dst += i; 4813 } 4814 4815 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4816 i = (char *)dst - (char *)rule; 4817 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 4818 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 4819 if (!do_quiet) 4820 show_ipfw(rule, 0, 0); 4821 } 4822 4823 static void 4824 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 4825 { 4826 int rulenum; 4827 int failed = EX_OK; 4828 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 4829 4830 av++; ac--; 4831 4832 if (!ac) { 4833 /* clear all entries */ 4834 if (do_cmd(optname, NULL, 0) < 0) 4835 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 4836 if (!do_quiet) 4837 printf("%s.\n", optname == IP_FW_ZERO ? 4838 "Accounting cleared":"Logging counts reset"); 4839 4840 return; 4841 } 4842 4843 while (ac) { 4844 /* Rule number */ 4845 if (isdigit(**av)) { 4846 rulenum = atoi(*av); 4847 av++; 4848 ac--; 4849 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 4850 warn("rule %u: setsockopt(IP_FW_%s)", 4851 rulenum, name); 4852 failed = EX_UNAVAILABLE; 4853 } else if (!do_quiet) 4854 printf("Entry %d %s.\n", rulenum, 4855 optname == IP_FW_ZERO ? 4856 "cleared" : "logging count reset"); 4857 } else { 4858 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4859 } 4860 } 4861 if (failed != EX_OK) 4862 exit(failed); 4863 } 4864 4865 static void 4866 flush(int force) 4867 { 4868 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 4869 4870 if (!force && !do_quiet) { /* need to ask user */ 4871 int c; 4872 4873 printf("Are you sure? [yn] "); 4874 fflush(stdout); 4875 do { 4876 c = toupper(getc(stdin)); 4877 while (c != '\n' && getc(stdin) != '\n') 4878 if (feof(stdin)) 4879 return; /* and do not flush */ 4880 } while (c != 'Y' && c != 'N'); 4881 printf("\n"); 4882 if (c == 'N') /* user said no */ 4883 return; 4884 } 4885 if (do_cmd(cmd, NULL, 0) < 0) 4886 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 4887 do_pipe ? "DUMMYNET" : "FW"); 4888 if (!do_quiet) 4889 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 4890 } 4891 4892 /* 4893 * Free a the (locally allocated) copy of command line arguments. 4894 */ 4895 static void 4896 free_args(int ac, char **av) 4897 { 4898 int i; 4899 4900 for (i=0; i < ac; i++) 4901 free(av[i]); 4902 free(av); 4903 } 4904 4905 /* 4906 * This one handles all table-related commands 4907 * ipfw table N add addr[/masklen] [value] 4908 * ipfw table N delete addr[/masklen] 4909 * ipfw table N flush 4910 * ipfw table N list 4911 */ 4912 static void 4913 table_handler(int ac, char *av[]) 4914 { 4915 ipfw_table_entry ent; 4916 ipfw_table *tbl; 4917 int do_add; 4918 char *p; 4919 socklen_t l; 4920 uint32_t a; 4921 4922 ac--; av++; 4923 if (ac && isdigit(**av)) { 4924 ent.tbl = atoi(*av); 4925 ac--; av++; 4926 } else 4927 errx(EX_USAGE, "table number required"); 4928 NEED1("table needs command"); 4929 if (_substrcmp(*av, "add") == 0 || 4930 _substrcmp(*av, "delete") == 0) { 4931 do_add = **av == 'a'; 4932 ac--; av++; 4933 if (!ac) 4934 errx(EX_USAGE, "IP address required"); 4935 p = strchr(*av, '/'); 4936 if (p) { 4937 *p++ = '\0'; 4938 ent.masklen = atoi(p); 4939 if (ent.masklen > 32) 4940 errx(EX_DATAERR, "bad width ``%s''", p); 4941 } else 4942 ent.masklen = 32; 4943 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 4944 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4945 ac--; av++; 4946 if (do_add && ac) 4947 ent.value = strtoul(*av, NULL, 0); 4948 else 4949 ent.value = 0; 4950 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 4951 &ent, sizeof(ent)) < 0) { 4952 /* If running silent, don't bomb out on these errors. */ 4953 if (!(do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 4954 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 4955 do_add ? "ADD" : "DEL"); 4956 /* In silent mode, react to a failed add by deleting */ 4957 if (do_add) { 4958 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 4959 if (do_cmd(IP_FW_TABLE_ADD, 4960 &ent, sizeof(ent)) < 0) 4961 err(EX_OSERR, 4962 "setsockopt(IP_FW_TABLE_ADD)"); 4963 } 4964 } 4965 } else if (_substrcmp(*av, "flush") == 0) { 4966 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4967 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4968 } else if (_substrcmp(*av, "list") == 0) { 4969 a = ent.tbl; 4970 l = sizeof(a); 4971 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4972 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4973 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4974 tbl = malloc(l); 4975 if (tbl == NULL) 4976 err(EX_OSERR, "malloc"); 4977 tbl->tbl = ent.tbl; 4978 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 4979 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 4980 for (a = 0; a < tbl->cnt; a++) { 4981 printf("%s/%u %u\n", 4982 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 4983 tbl->ent[a].masklen, tbl->ent[a].value); 4984 } 4985 } else 4986 errx(EX_USAGE, "invalid table command %s", *av); 4987 } 4988 4989 /* 4990 * Called with the arguments (excluding program name). 4991 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 4992 */ 4993 static int 4994 ipfw_main(int oldac, char **oldav) 4995 { 4996 int ch, ac, save_ac; 4997 char **av, **save_av; 4998 int do_acct = 0; /* Show packet/byte count */ 4999 5000 #define WHITESP " \t\f\v\n\r" 5001 if (oldac == 0) 5002 return 1; 5003 else if (oldac == 1) { 5004 /* 5005 * If we are called with a single string, try to split it into 5006 * arguments for subsequent parsing. 5007 * But first, remove spaces after a ',', by copying the string 5008 * in-place. 5009 */ 5010 char *arg = oldav[0]; /* The string... */ 5011 int l = strlen(arg); 5012 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 5013 int i, j; 5014 for (i = j = 0; i < l; i++) { 5015 if (arg[i] == '#') /* comment marker */ 5016 break; 5017 if (copy) { 5018 arg[j++] = arg[i]; 5019 copy = !index("," WHITESP, arg[i]); 5020 } else { 5021 copy = !index(WHITESP, arg[i]); 5022 if (copy) 5023 arg[j++] = arg[i]; 5024 } 5025 } 5026 if (!copy && j > 0) /* last char was a 'blank', remove it */ 5027 j--; 5028 l = j; /* the new argument length */ 5029 arg[j++] = '\0'; 5030 if (l == 0) /* empty string! */ 5031 return 1; 5032 5033 /* 5034 * First, count number of arguments. Because of the previous 5035 * processing, this is just the number of blanks plus 1. 5036 */ 5037 for (i = 0, ac = 1; i < l; i++) 5038 if (index(WHITESP, arg[i]) != NULL) 5039 ac++; 5040 5041 av = calloc(ac, sizeof(char *)); 5042 5043 /* 5044 * Second, copy arguments from cmd[] to av[]. For each one, 5045 * j is the initial character, i is the one past the end. 5046 */ 5047 for (ac = 0, i = j = 0; i < l; i++) 5048 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 5049 if (i == l-1) 5050 i++; 5051 av[ac] = calloc(i-j+1, 1); 5052 bcopy(arg+j, av[ac], i-j); 5053 ac++; 5054 j = i + 1; 5055 } 5056 } else { 5057 /* 5058 * If an argument ends with ',' join with the next one. 5059 */ 5060 int first, i, l; 5061 5062 av = calloc(oldac, sizeof(char *)); 5063 for (first = i = ac = 0, l = 0; i < oldac; i++) { 5064 char *arg = oldav[i]; 5065 int k = strlen(arg); 5066 5067 l += k; 5068 if (arg[k-1] != ',' || i == oldac-1) { 5069 /* Time to copy. */ 5070 av[ac] = calloc(l+1, 1); 5071 for (l=0; first <= i; first++) { 5072 strcat(av[ac]+l, oldav[first]); 5073 l += strlen(oldav[first]); 5074 } 5075 ac++; 5076 l = 0; 5077 first = i+1; 5078 } 5079 } 5080 } 5081 5082 /* Set the force flag for non-interactive processes */ 5083 if (!do_force) 5084 do_force = !isatty(STDIN_FILENO); 5085 5086 /* Save arguments for final freeing of memory. */ 5087 save_ac = ac; 5088 save_av = av; 5089 5090 optind = optreset = 0; 5091 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 5092 switch (ch) { 5093 case 'a': 5094 do_acct = 1; 5095 break; 5096 5097 case 'b': 5098 comment_only = 1; 5099 do_compact = 1; 5100 break; 5101 5102 case 'c': 5103 do_compact = 1; 5104 break; 5105 5106 case 'd': 5107 do_dynamic = 1; 5108 break; 5109 5110 case 'e': 5111 do_expired = 1; 5112 break; 5113 5114 case 'f': 5115 do_force = 1; 5116 break; 5117 5118 case 'h': /* help */ 5119 free_args(save_ac, save_av); 5120 help(); 5121 break; /* NOTREACHED */ 5122 5123 case 'n': 5124 test_only = 1; 5125 break; 5126 5127 case 'N': 5128 do_resolv = 1; 5129 break; 5130 5131 case 'q': 5132 do_quiet = 1; 5133 break; 5134 5135 case 's': /* sort */ 5136 do_sort = atoi(optarg); 5137 break; 5138 5139 case 'S': 5140 show_sets = 1; 5141 break; 5142 5143 case 't': 5144 do_time = 1; 5145 break; 5146 5147 case 'T': 5148 do_time = 2; /* numeric timestamp */ 5149 break; 5150 5151 case 'v': /* verbose */ 5152 verbose = 1; 5153 break; 5154 5155 default: 5156 free_args(save_ac, save_av); 5157 return 1; 5158 } 5159 5160 ac -= optind; 5161 av += optind; 5162 NEED1("bad arguments, for usage summary ``ipfw''"); 5163 5164 /* 5165 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 5166 * e.g. "100 add allow ..." instead of "add 100 allow ...". 5167 * In case, swap first and second argument to get the normal form. 5168 */ 5169 if (ac > 1 && isdigit(*av[0])) { 5170 char *p = av[0]; 5171 5172 av[0] = av[1]; 5173 av[1] = p; 5174 } 5175 5176 /* 5177 * optional: pipe or queue 5178 */ 5179 do_pipe = 0; 5180 if (_substrcmp(*av, "pipe") == 0) 5181 do_pipe = 1; 5182 else if (_substrcmp(*av, "queue") == 0) 5183 do_pipe = 2; 5184 if (do_pipe) { 5185 ac--; 5186 av++; 5187 } 5188 NEED1("missing command"); 5189 5190 /* 5191 * For pipes and queues we normally say 'pipe NN config' 5192 * but the code is easier to parse as 'pipe config NN' 5193 * so we swap the two arguments. 5194 */ 5195 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 5196 char *p = av[0]; 5197 5198 av[0] = av[1]; 5199 av[1] = p; 5200 } 5201 5202 if (_substrcmp(*av, "add") == 0) 5203 add(ac, av); 5204 else if (do_pipe && _substrcmp(*av, "config") == 0) 5205 config_pipe(ac, av); 5206 else if (_substrcmp(*av, "delete") == 0) 5207 delete(ac, av); 5208 else if (_substrcmp(*av, "flush") == 0) 5209 flush(do_force); 5210 else if (_substrcmp(*av, "zero") == 0) 5211 zero(ac, av, IP_FW_ZERO); 5212 else if (_substrcmp(*av, "resetlog") == 0) 5213 zero(ac, av, IP_FW_RESETLOG); 5214 else if (_substrcmp(*av, "print") == 0 || 5215 _substrcmp(*av, "list") == 0) 5216 list(ac, av, do_acct); 5217 else if (_substrcmp(*av, "set") == 0) 5218 sets_handler(ac, av); 5219 else if (_substrcmp(*av, "table") == 0) 5220 table_handler(ac, av); 5221 else if (_substrcmp(*av, "enable") == 0) 5222 sysctl_handler(ac, av, 1); 5223 else if (_substrcmp(*av, "disable") == 0) 5224 sysctl_handler(ac, av, 0); 5225 else if (_substrcmp(*av, "show") == 0) 5226 list(ac, av, 1 /* show counters */); 5227 else 5228 errx(EX_USAGE, "bad command `%s'", *av); 5229 5230 /* Free memory allocated in the argument parsing. */ 5231 free_args(save_ac, save_av); 5232 return 0; 5233 } 5234 5235 5236 static void 5237 ipfw_readfile(int ac, char *av[]) 5238 { 5239 #define MAX_ARGS 32 5240 char buf[BUFSIZ]; 5241 char *cmd = NULL, *filename = av[ac-1]; 5242 int c, lineno=0; 5243 FILE *f = NULL; 5244 pid_t preproc = 0; 5245 5246 filename = av[ac-1]; 5247 5248 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 5249 switch(c) { 5250 case 'c': 5251 do_compact = 1; 5252 break; 5253 5254 case 'f': 5255 do_force = 1; 5256 break; 5257 5258 case 'N': 5259 do_resolv = 1; 5260 break; 5261 5262 case 'n': 5263 test_only = 1; 5264 break; 5265 5266 case 'p': 5267 cmd = optarg; 5268 /* 5269 * Skip previous args and delete last one, so we 5270 * pass all but the last argument to the preprocessor 5271 * via av[optind-1] 5272 */ 5273 av += optind - 1; 5274 ac -= optind - 1; 5275 av[ac-1] = NULL; 5276 fprintf(stderr, "command is %s\n", av[0]); 5277 break; 5278 5279 case 'q': 5280 do_quiet = 1; 5281 break; 5282 5283 case 'S': 5284 show_sets = 1; 5285 break; 5286 5287 default: 5288 errx(EX_USAGE, "bad arguments, for usage" 5289 " summary ``ipfw''"); 5290 } 5291 5292 if (cmd != NULL) 5293 break; 5294 } 5295 5296 if (cmd == NULL && ac != optind + 1) { 5297 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 5298 errx(EX_USAGE, "extraneous filename arguments"); 5299 } 5300 5301 if ((f = fopen(filename, "r")) == NULL) 5302 err(EX_UNAVAILABLE, "fopen: %s", filename); 5303 5304 if (cmd != NULL) { /* pipe through preprocessor */ 5305 int pipedes[2]; 5306 5307 if (pipe(pipedes) == -1) 5308 err(EX_OSERR, "cannot create pipe"); 5309 5310 preproc = fork(); 5311 if (preproc == -1) 5312 err(EX_OSERR, "cannot fork"); 5313 5314 if (preproc == 0) { 5315 /* 5316 * Child, will run the preprocessor with the 5317 * file on stdin and the pipe on stdout. 5318 */ 5319 if (dup2(fileno(f), 0) == -1 5320 || dup2(pipedes[1], 1) == -1) 5321 err(EX_OSERR, "dup2()"); 5322 fclose(f); 5323 close(pipedes[1]); 5324 close(pipedes[0]); 5325 execvp(cmd, av); 5326 err(EX_OSERR, "execvp(%s) failed", cmd); 5327 } else { /* parent, will reopen f as the pipe */ 5328 fclose(f); 5329 close(pipedes[1]); 5330 if ((f = fdopen(pipedes[0], "r")) == NULL) { 5331 int savederrno = errno; 5332 5333 (void)kill(preproc, SIGTERM); 5334 errno = savederrno; 5335 err(EX_OSERR, "fdopen()"); 5336 } 5337 } 5338 } 5339 5340 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 5341 char linename[10]; 5342 char *args[1]; 5343 5344 lineno++; 5345 sprintf(linename, "Line %d", lineno); 5346 setprogname(linename); /* XXX */ 5347 args[0] = buf; 5348 ipfw_main(1, args); 5349 } 5350 fclose(f); 5351 if (cmd != NULL) { 5352 int status; 5353 5354 if (waitpid(preproc, &status, 0) == -1) 5355 errx(EX_OSERR, "waitpid()"); 5356 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 5357 errx(EX_UNAVAILABLE, 5358 "preprocessor exited with status %d", 5359 WEXITSTATUS(status)); 5360 else if (WIFSIGNALED(status)) 5361 errx(EX_UNAVAILABLE, 5362 "preprocessor exited with signal %d", 5363 WTERMSIG(status)); 5364 } 5365 } 5366 5367 int 5368 main(int ac, char *av[]) 5369 { 5370 /* 5371 * If the last argument is an absolute pathname, interpret it 5372 * as a file to be preprocessed. 5373 */ 5374 5375 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 5376 ipfw_readfile(ac, av); 5377 else { 5378 if (ipfw_main(ac-1, av+1)) 5379 show_usage(); 5380 } 5381 return EX_OK; 5382 } 5383