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 <netinet/in.h> 53 #include <netinet/in_systm.h> 54 #include <netinet/ip.h> 55 #include <netinet/ip_icmp.h> 56 #include <netinet/ip_fw.h> 57 #include <netinet/ip_dummynet.h> 58 #include <netinet/tcp.h> 59 #include <arpa/inet.h> 60 61 int 62 do_resolv, /* Would try to resolve all */ 63 do_time, /* Show time stamps */ 64 do_quiet, /* Be quiet in add and flush */ 65 do_pipe, /* this cmd refers to a pipe */ 66 do_sort, /* field to sort results (0 = no) */ 67 do_dynamic, /* display dynamic rules */ 68 do_expired, /* display expired dynamic rules */ 69 do_compact, /* show rules in compact mode */ 70 do_force, /* do not ask for confirmation */ 71 show_sets, /* display rule sets */ 72 test_only, /* only check syntax */ 73 comment_only, /* only print action and comment */ 74 verbose; 75 76 #define IP_MASK_ALL 0xffffffff 77 /* 78 * the following macro returns an error message if we run out of 79 * arguments. 80 */ 81 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 82 83 /* 84 * _s_x is a structure that stores a string <-> token pairs, used in 85 * various places in the parser. Entries are stored in arrays, 86 * with an entry with s=NULL as terminator. 87 * The search routines are match_token() and match_value(). 88 * Often, an element with x=0 contains an error string. 89 * 90 */ 91 struct _s_x { 92 char const *s; 93 int x; 94 }; 95 96 static struct _s_x f_tcpflags[] = { 97 { "syn", TH_SYN }, 98 { "fin", TH_FIN }, 99 { "ack", TH_ACK }, 100 { "psh", TH_PUSH }, 101 { "rst", TH_RST }, 102 { "urg", TH_URG }, 103 { "tcp flag", 0 }, 104 { NULL, 0 } 105 }; 106 107 static struct _s_x f_tcpopts[] = { 108 { "mss", IP_FW_TCPOPT_MSS }, 109 { "maxseg", IP_FW_TCPOPT_MSS }, 110 { "window", IP_FW_TCPOPT_WINDOW }, 111 { "sack", IP_FW_TCPOPT_SACK }, 112 { "ts", IP_FW_TCPOPT_TS }, 113 { "timestamp", IP_FW_TCPOPT_TS }, 114 { "cc", IP_FW_TCPOPT_CC }, 115 { "tcp option", 0 }, 116 { NULL, 0 } 117 }; 118 119 /* 120 * IP options span the range 0 to 255 so we need to remap them 121 * (though in fact only the low 5 bits are significant). 122 */ 123 static struct _s_x f_ipopts[] = { 124 { "ssrr", IP_FW_IPOPT_SSRR}, 125 { "lsrr", IP_FW_IPOPT_LSRR}, 126 { "rr", IP_FW_IPOPT_RR}, 127 { "ts", IP_FW_IPOPT_TS}, 128 { "ip option", 0 }, 129 { NULL, 0 } 130 }; 131 132 static struct _s_x f_iptos[] = { 133 { "lowdelay", IPTOS_LOWDELAY}, 134 { "throughput", IPTOS_THROUGHPUT}, 135 { "reliability", IPTOS_RELIABILITY}, 136 { "mincost", IPTOS_MINCOST}, 137 { "congestion", IPTOS_CE}, 138 { "ecntransport", IPTOS_ECT}, 139 { "ip tos option", 0}, 140 { NULL, 0 } 141 }; 142 143 static struct _s_x limit_masks[] = { 144 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 145 {"src-addr", DYN_SRC_ADDR}, 146 {"src-port", DYN_SRC_PORT}, 147 {"dst-addr", DYN_DST_ADDR}, 148 {"dst-port", DYN_DST_PORT}, 149 {NULL, 0} 150 }; 151 152 /* 153 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 154 * This is only used in this code. 155 */ 156 #define IPPROTO_ETHERTYPE 0x1000 157 static struct _s_x ether_types[] = { 158 /* 159 * Note, we cannot use "-:&/" in the names because they are field 160 * separators in the type specifications. Also, we use s = NULL as 161 * end-delimiter, because a type of 0 can be legal. 162 */ 163 { "ip", 0x0800 }, 164 { "ipv4", 0x0800 }, 165 { "ipv6", 0x86dd }, 166 { "arp", 0x0806 }, 167 { "rarp", 0x8035 }, 168 { "vlan", 0x8100 }, 169 { "loop", 0x9000 }, 170 { "trail", 0x1000 }, 171 { "at", 0x809b }, 172 { "atalk", 0x809b }, 173 { "aarp", 0x80f3 }, 174 { "pppoe_disc", 0x8863 }, 175 { "pppoe_sess", 0x8864 }, 176 { "ipx_8022", 0x00E0 }, 177 { "ipx_8023", 0x0000 }, 178 { "ipx_ii", 0x8137 }, 179 { "ipx_snap", 0x8137 }, 180 { "ipx", 0x8137 }, 181 { "ns", 0x0600 }, 182 { NULL, 0 } 183 }; 184 185 static void show_usage(void); 186 187 enum tokens { 188 TOK_NULL=0, 189 190 TOK_OR, 191 TOK_NOT, 192 TOK_STARTBRACE, 193 TOK_ENDBRACE, 194 195 TOK_ACCEPT, 196 TOK_COUNT, 197 TOK_PIPE, 198 TOK_QUEUE, 199 TOK_DIVERT, 200 TOK_TEE, 201 TOK_FORWARD, 202 TOK_SKIPTO, 203 TOK_DENY, 204 TOK_REJECT, 205 TOK_RESET, 206 TOK_UNREACH, 207 TOK_CHECKSTATE, 208 209 TOK_ALTQ, 210 TOK_LOG, 211 212 TOK_UID, 213 TOK_GID, 214 TOK_JAIL, 215 TOK_IN, 216 TOK_LIMIT, 217 TOK_KEEPSTATE, 218 TOK_LAYER2, 219 TOK_OUT, 220 TOK_DIVERTED, 221 TOK_DIVERTEDLOOPBACK, 222 TOK_DIVERTEDOUTPUT, 223 TOK_XMIT, 224 TOK_RECV, 225 TOK_VIA, 226 TOK_FRAG, 227 TOK_IPOPTS, 228 TOK_IPLEN, 229 TOK_IPID, 230 TOK_IPPRECEDENCE, 231 TOK_IPTOS, 232 TOK_IPTTL, 233 TOK_IPVER, 234 TOK_ESTAB, 235 TOK_SETUP, 236 TOK_TCPDATALEN, 237 TOK_TCPFLAGS, 238 TOK_TCPOPTS, 239 TOK_TCPSEQ, 240 TOK_TCPACK, 241 TOK_TCPWIN, 242 TOK_ICMPTYPES, 243 TOK_MAC, 244 TOK_MACTYPE, 245 TOK_VERREVPATH, 246 TOK_VERSRCREACH, 247 TOK_ANTISPOOF, 248 TOK_IPSEC, 249 TOK_COMMENT, 250 251 TOK_PLR, 252 TOK_NOERROR, 253 TOK_BUCKETS, 254 TOK_DSTIP, 255 TOK_SRCIP, 256 TOK_DSTPORT, 257 TOK_SRCPORT, 258 TOK_ALL, 259 TOK_MASK, 260 TOK_BW, 261 TOK_DELAY, 262 TOK_RED, 263 TOK_GRED, 264 TOK_DROPTAIL, 265 TOK_PROTO, 266 TOK_WEIGHT, 267 }; 268 269 struct _s_x dummynet_params[] = { 270 { "plr", TOK_PLR }, 271 { "noerror", TOK_NOERROR }, 272 { "buckets", TOK_BUCKETS }, 273 { "dst-ip", TOK_DSTIP }, 274 { "src-ip", TOK_SRCIP }, 275 { "dst-port", TOK_DSTPORT }, 276 { "src-port", TOK_SRCPORT }, 277 { "proto", TOK_PROTO }, 278 { "weight", TOK_WEIGHT }, 279 { "all", TOK_ALL }, 280 { "mask", TOK_MASK }, 281 { "droptail", TOK_DROPTAIL }, 282 { "red", TOK_RED }, 283 { "gred", TOK_GRED }, 284 { "bw", TOK_BW }, 285 { "bandwidth", TOK_BW }, 286 { "delay", TOK_DELAY }, 287 { "pipe", TOK_PIPE }, 288 { "queue", TOK_QUEUE }, 289 { "dummynet-params", TOK_NULL }, 290 { NULL, 0 } /* terminator */ 291 }; 292 293 struct _s_x rule_actions[] = { 294 { "accept", TOK_ACCEPT }, 295 { "pass", TOK_ACCEPT }, 296 { "allow", TOK_ACCEPT }, 297 { "permit", TOK_ACCEPT }, 298 { "count", TOK_COUNT }, 299 { "pipe", TOK_PIPE }, 300 { "queue", TOK_QUEUE }, 301 { "divert", TOK_DIVERT }, 302 { "tee", TOK_TEE }, 303 { "fwd", TOK_FORWARD }, 304 { "forward", TOK_FORWARD }, 305 { "skipto", TOK_SKIPTO }, 306 { "deny", TOK_DENY }, 307 { "drop", TOK_DENY }, 308 { "reject", TOK_REJECT }, 309 { "reset", TOK_RESET }, 310 { "unreach", TOK_UNREACH }, 311 { "check-state", TOK_CHECKSTATE }, 312 { "//", TOK_COMMENT }, 313 { NULL, 0 } /* terminator */ 314 }; 315 316 struct _s_x rule_action_params[] = { 317 { "altq", TOK_ALTQ }, 318 { "log", TOK_LOG }, 319 { NULL, 0 } /* terminator */ 320 }; 321 322 struct _s_x rule_options[] = { 323 { "uid", TOK_UID }, 324 { "gid", TOK_GID }, 325 { "jail", TOK_JAIL }, 326 { "in", TOK_IN }, 327 { "limit", TOK_LIMIT }, 328 { "keep-state", TOK_KEEPSTATE }, 329 { "bridged", TOK_LAYER2 }, 330 { "layer2", TOK_LAYER2 }, 331 { "out", TOK_OUT }, 332 { "diverted", TOK_DIVERTED }, 333 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 334 { "diverted-output", TOK_DIVERTEDOUTPUT }, 335 { "xmit", TOK_XMIT }, 336 { "recv", TOK_RECV }, 337 { "via", TOK_VIA }, 338 { "fragment", TOK_FRAG }, 339 { "frag", TOK_FRAG }, 340 { "ipoptions", TOK_IPOPTS }, 341 { "ipopts", TOK_IPOPTS }, 342 { "iplen", TOK_IPLEN }, 343 { "ipid", TOK_IPID }, 344 { "ipprecedence", TOK_IPPRECEDENCE }, 345 { "iptos", TOK_IPTOS }, 346 { "ipttl", TOK_IPTTL }, 347 { "ipversion", TOK_IPVER }, 348 { "ipver", TOK_IPVER }, 349 { "estab", TOK_ESTAB }, 350 { "established", TOK_ESTAB }, 351 { "setup", TOK_SETUP }, 352 { "tcpdatalen", TOK_TCPDATALEN }, 353 { "tcpflags", TOK_TCPFLAGS }, 354 { "tcpflgs", TOK_TCPFLAGS }, 355 { "tcpoptions", TOK_TCPOPTS }, 356 { "tcpopts", TOK_TCPOPTS }, 357 { "tcpseq", TOK_TCPSEQ }, 358 { "tcpack", TOK_TCPACK }, 359 { "tcpwin", TOK_TCPWIN }, 360 { "icmptype", TOK_ICMPTYPES }, 361 { "icmptypes", TOK_ICMPTYPES }, 362 { "dst-ip", TOK_DSTIP }, 363 { "src-ip", TOK_SRCIP }, 364 { "dst-port", TOK_DSTPORT }, 365 { "src-port", TOK_SRCPORT }, 366 { "proto", TOK_PROTO }, 367 { "MAC", TOK_MAC }, 368 { "mac", TOK_MAC }, 369 { "mac-type", TOK_MACTYPE }, 370 { "verrevpath", TOK_VERREVPATH }, 371 { "versrcreach", TOK_VERSRCREACH }, 372 { "antispoof", TOK_ANTISPOOF }, 373 { "ipsec", TOK_IPSEC }, 374 { "//", TOK_COMMENT }, 375 376 { "not", TOK_NOT }, /* pseudo option */ 377 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 378 { "or", TOK_OR }, /* pseudo option */ 379 { "|", /* escape */ TOK_OR }, /* pseudo option */ 380 { "{", TOK_STARTBRACE }, /* pseudo option */ 381 { "(", TOK_STARTBRACE }, /* pseudo option */ 382 { "}", TOK_ENDBRACE }, /* pseudo option */ 383 { ")", TOK_ENDBRACE }, /* pseudo option */ 384 { NULL, 0 } /* terminator */ 385 }; 386 387 static __inline uint64_t 388 align_uint64(uint64_t *pll) { 389 uint64_t ret; 390 391 bcopy (pll, &ret, sizeof(ret)); 392 return ret; 393 } 394 395 /* 396 * conditionally runs the command. 397 */ 398 static int 399 do_cmd(int optname, void *optval, uintptr_t optlen) 400 { 401 static int s = -1; /* the socket */ 402 int i; 403 404 if (test_only) 405 return 0; 406 407 if (s == -1) 408 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 409 if (s < 0) 410 err(EX_UNAVAILABLE, "socket"); 411 412 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 413 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 414 optname == IP_FW_TABLE_GETSIZE) 415 i = getsockopt(s, IPPROTO_IP, optname, optval, 416 (socklen_t *)optlen); 417 else 418 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 419 return i; 420 } 421 422 /** 423 * match_token takes a table and a string, returns the value associated 424 * with the string (-1 in case of failure). 425 */ 426 static int 427 match_token(struct _s_x *table, char *string) 428 { 429 struct _s_x *pt; 430 uint i = strlen(string); 431 432 for (pt = table ; i && pt->s != NULL ; pt++) 433 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 434 return pt->x; 435 return -1; 436 } 437 438 /** 439 * match_value takes a table and a value, returns the string associated 440 * with the value (NULL in case of failure). 441 */ 442 static char const * 443 match_value(struct _s_x *p, int value) 444 { 445 for (; p->s != NULL; p++) 446 if (p->x == value) 447 return p->s; 448 return NULL; 449 } 450 451 /* 452 * _substrcmp takes two strings and returns 1 if they do not match, 453 * and 0 if they match exactly or the first string is a sub-string 454 * of the second. A warning is printed to stderr in the case that the 455 * first string is a sub-string of the second. 456 * 457 * This function will be removed in the future through the usual 458 * deprecation process. 459 */ 460 static int 461 _substrcmp(const char *str1, const char* str2) 462 { 463 464 if (strncmp(str1, str2, strlen(str1)) != 0) 465 return 1; 466 467 if (strlen(str1) != strlen(str2)) 468 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 469 str1, str2); 470 return 0; 471 } 472 473 /* 474 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 475 * and 0 if they match exactly or the second string is a sub-string 476 * of the first. A warning is printed to stderr in the case that the 477 * first string does not match the third. 478 * 479 * This function exists to warn about the bizzare construction 480 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 481 * for "bytes". The problem is that in addition to accepting "by", 482 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 483 * other string beginning with "by". 484 * 485 * This function will be removed in the future through the usual 486 * deprecation process. 487 */ 488 static int 489 _substrcmp2(const char *str1, const char* str2, const char* str3) 490 { 491 492 if (strncmp(str1, str2, strlen(str2)) != 0) 493 return 1; 494 495 if (strcmp(str1, str3) != 0) 496 warnx("DEPRECATED: '%s' matched '%s'", 497 str1, str3); 498 return 0; 499 } 500 501 /* 502 * prints one port, symbolic or numeric 503 */ 504 static void 505 print_port(int proto, uint16_t port) 506 { 507 508 if (proto == IPPROTO_ETHERTYPE) { 509 char const *s; 510 511 if (do_resolv && (s = match_value(ether_types, port)) ) 512 printf("%s", s); 513 else 514 printf("0x%04x", port); 515 } else { 516 struct servent *se = NULL; 517 if (do_resolv) { 518 struct protoent *pe = getprotobynumber(proto); 519 520 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 521 } 522 if (se) 523 printf("%s", se->s_name); 524 else 525 printf("%d", port); 526 } 527 } 528 529 struct _s_x _port_name[] = { 530 {"dst-port", O_IP_DSTPORT}, 531 {"src-port", O_IP_SRCPORT}, 532 {"ipid", O_IPID}, 533 {"iplen", O_IPLEN}, 534 {"ipttl", O_IPTTL}, 535 {"mac-type", O_MAC_TYPE}, 536 {"tcpdatalen", O_TCPDATALEN}, 537 {NULL, 0} 538 }; 539 540 /* 541 * Print the values in a list 16-bit items of the types above. 542 * XXX todo: add support for mask. 543 */ 544 static void 545 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 546 { 547 uint16_t *p = cmd->ports; 548 int i; 549 char const *sep; 550 551 if (cmd->o.len & F_NOT) 552 printf(" not"); 553 if (opcode != 0) { 554 sep = match_value(_port_name, opcode); 555 if (sep == NULL) 556 sep = "???"; 557 printf (" %s", sep); 558 } 559 sep = " "; 560 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 561 printf(sep); 562 print_port(proto, p[0]); 563 if (p[0] != p[1]) { 564 printf("-"); 565 print_port(proto, p[1]); 566 } 567 sep = ","; 568 } 569 } 570 571 /* 572 * Like strtol, but also translates service names into port numbers 573 * for some protocols. 574 * In particular: 575 * proto == -1 disables the protocol check; 576 * proto == IPPROTO_ETHERTYPE looks up an internal table 577 * proto == <some value in /etc/protocols> matches the values there. 578 * Returns *end == s in case the parameter is not found. 579 */ 580 static int 581 strtoport(char *s, char **end, int base, int proto) 582 { 583 char *p, *buf; 584 char *s1; 585 int i; 586 587 *end = s; /* default - not found */ 588 if (*s == '\0') 589 return 0; /* not found */ 590 591 if (isdigit(*s)) 592 return strtol(s, end, base); 593 594 /* 595 * find separator. '\\' escapes the next char. 596 */ 597 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 598 if (*s1 == '\\' && s1[1] != '\0') 599 s1++; 600 601 buf = malloc(s1 - s + 1); 602 if (buf == NULL) 603 return 0; 604 605 /* 606 * copy into a buffer skipping backslashes 607 */ 608 for (p = s, i = 0; p != s1 ; p++) 609 if (*p != '\\') 610 buf[i++] = *p; 611 buf[i++] = '\0'; 612 613 if (proto == IPPROTO_ETHERTYPE) { 614 i = match_token(ether_types, buf); 615 free(buf); 616 if (i != -1) { /* found */ 617 *end = s1; 618 return i; 619 } 620 } else { 621 struct protoent *pe = NULL; 622 struct servent *se; 623 624 if (proto != 0) 625 pe = getprotobynumber(proto); 626 setservent(1); 627 se = getservbyname(buf, pe ? pe->p_name : NULL); 628 free(buf); 629 if (se != NULL) { 630 *end = s1; 631 return ntohs(se->s_port); 632 } 633 } 634 return 0; /* not found */ 635 } 636 637 /* 638 * Map between current altq queue id numbers and names. 639 */ 640 static int altq_fetched = 0; 641 static TAILQ_HEAD(, pf_altq) altq_entries = 642 TAILQ_HEAD_INITIALIZER(altq_entries); 643 644 static void 645 altq_set_enabled(int enabled) 646 { 647 int pffd; 648 649 pffd = open("/dev/pf", O_RDWR); 650 if (pffd == -1) 651 err(EX_UNAVAILABLE, 652 "altq support opening pf(4) control device"); 653 if (enabled) { 654 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 655 err(EX_UNAVAILABLE, "enabling altq"); 656 } else { 657 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 658 err(EX_UNAVAILABLE, "disabling altq"); 659 } 660 close(pffd); 661 } 662 663 static void 664 altq_fetch() 665 { 666 struct pfioc_altq pfioc; 667 struct pf_altq *altq; 668 int pffd, mnr; 669 670 if (altq_fetched) 671 return; 672 altq_fetched = 1; 673 pffd = open("/dev/pf", O_RDONLY); 674 if (pffd == -1) { 675 warn("altq support opening pf(4) control device"); 676 return; 677 } 678 bzero(&pfioc, sizeof(pfioc)); 679 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 680 warn("altq support getting queue list"); 681 close(pffd); 682 return; 683 } 684 mnr = pfioc.nr; 685 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 686 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 687 if (errno == EBUSY) 688 break; 689 warn("altq support getting queue list"); 690 close(pffd); 691 return; 692 } 693 if (pfioc.altq.qid == 0) 694 continue; 695 altq = malloc(sizeof(*altq)); 696 if (altq == NULL) 697 err(EX_OSERR, "malloc"); 698 *altq = pfioc.altq; 699 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 700 } 701 close(pffd); 702 } 703 704 static u_int32_t 705 altq_name_to_qid(const char *name) 706 { 707 struct pf_altq *altq; 708 709 altq_fetch(); 710 TAILQ_FOREACH(altq, &altq_entries, entries) 711 if (strcmp(name, altq->qname) == 0) 712 break; 713 if (altq == NULL) 714 errx(EX_DATAERR, "altq has no queue named `%s'", name); 715 return altq->qid; 716 } 717 718 static const char * 719 altq_qid_to_name(u_int32_t qid) 720 { 721 struct pf_altq *altq; 722 723 altq_fetch(); 724 TAILQ_FOREACH(altq, &altq_entries, entries) 725 if (qid == altq->qid) 726 break; 727 if (altq == NULL) 728 return NULL; 729 return altq->qname; 730 } 731 732 static void 733 fill_altq_qid(u_int32_t *qid, const char *av) 734 { 735 *qid = altq_name_to_qid(av); 736 } 737 738 /* 739 * Fill the body of the command with the list of port ranges. 740 */ 741 static int 742 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 743 { 744 uint16_t a, b, *p = cmd->ports; 745 int i = 0; 746 char *s = av; 747 748 while (*s) { 749 a = strtoport(av, &s, 0, proto); 750 if (s == av) /* no parameter */ 751 break; 752 if (*s == '-') { /* a range */ 753 av = s+1; 754 b = strtoport(av, &s, 0, proto); 755 if (s == av) /* no parameter */ 756 break; 757 p[0] = a; 758 p[1] = b; 759 } else if (*s == ',' || *s == '\0' ) 760 p[0] = p[1] = a; 761 else /* invalid separator */ 762 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 763 *s, av); 764 i++; 765 p += 2; 766 av = s+1; 767 } 768 if (i > 0) { 769 if (i+1 > F_LEN_MASK) 770 errx(EX_DATAERR, "too many ports/ranges\n"); 771 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 772 } 773 return i; 774 } 775 776 static struct _s_x icmpcodes[] = { 777 { "net", ICMP_UNREACH_NET }, 778 { "host", ICMP_UNREACH_HOST }, 779 { "protocol", ICMP_UNREACH_PROTOCOL }, 780 { "port", ICMP_UNREACH_PORT }, 781 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 782 { "srcfail", ICMP_UNREACH_SRCFAIL }, 783 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 784 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 785 { "isolated", ICMP_UNREACH_ISOLATED }, 786 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 787 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 788 { "tosnet", ICMP_UNREACH_TOSNET }, 789 { "toshost", ICMP_UNREACH_TOSHOST }, 790 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 791 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 792 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 793 { NULL, 0 } 794 }; 795 796 static void 797 fill_reject_code(u_short *codep, char *str) 798 { 799 int val; 800 char *s; 801 802 val = strtoul(str, &s, 0); 803 if (s == str || *s != '\0' || val >= 0x100) 804 val = match_token(icmpcodes, str); 805 if (val < 0) 806 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 807 *codep = val; 808 return; 809 } 810 811 static void 812 print_reject_code(uint16_t code) 813 { 814 char const *s = match_value(icmpcodes, code); 815 816 if (s != NULL) 817 printf("unreach %s", s); 818 else 819 printf("unreach %u", code); 820 } 821 822 /* 823 * Returns the number of bits set (from left) in a contiguous bitmask, 824 * or -1 if the mask is not contiguous. 825 * XXX this needs a proper fix. 826 * This effectively works on masks in big-endian (network) format. 827 * when compiled on little endian architectures. 828 * 829 * First bit is bit 7 of the first byte -- note, for MAC addresses, 830 * the first bit on the wire is bit 0 of the first byte. 831 * len is the max length in bits. 832 */ 833 static int 834 contigmask(uint8_t *p, int len) 835 { 836 int i, n; 837 838 for (i=0; i<len ; i++) 839 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 840 break; 841 for (n=i+1; n < len; n++) 842 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 843 return -1; /* mask not contiguous */ 844 return i; 845 } 846 847 /* 848 * print flags set/clear in the two bitmasks passed as parameters. 849 * There is a specialized check for f_tcpflags. 850 */ 851 static void 852 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 853 { 854 char const *comma = ""; 855 int i; 856 uint8_t set = cmd->arg1 & 0xff; 857 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 858 859 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 860 printf(" setup"); 861 return; 862 } 863 864 printf(" %s ", name); 865 for (i=0; list[i].x != 0; i++) { 866 if (set & list[i].x) { 867 set &= ~list[i].x; 868 printf("%s%s", comma, list[i].s); 869 comma = ","; 870 } 871 if (clear & list[i].x) { 872 clear &= ~list[i].x; 873 printf("%s!%s", comma, list[i].s); 874 comma = ","; 875 } 876 } 877 } 878 879 /* 880 * Print the ip address contained in a command. 881 */ 882 static void 883 print_ip(ipfw_insn_ip *cmd, char const *s) 884 { 885 struct hostent *he = NULL; 886 int len = F_LEN((ipfw_insn *)cmd); 887 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 888 889 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 890 891 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 892 printf("me"); 893 return; 894 } 895 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 896 cmd->o.opcode == O_IP_DST_LOOKUP) { 897 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 898 if (len == F_INSN_SIZE(ipfw_insn_u32)) 899 printf(",%u", *a); 900 printf(")"); 901 return; 902 } 903 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 904 uint32_t x, *map = (uint32_t *)&(cmd->mask); 905 int i, j; 906 char comma = '{'; 907 908 x = cmd->o.arg1 - 1; 909 x = htonl( ~x ); 910 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 911 printf("%s/%d", inet_ntoa(cmd->addr), 912 contigmask((uint8_t *)&x, 32)); 913 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 914 x &= 0xff; /* base */ 915 /* 916 * Print bits and ranges. 917 * Locate first bit set (i), then locate first bit unset (j). 918 * If we have 3+ consecutive bits set, then print them as a 919 * range, otherwise only print the initial bit and rescan. 920 */ 921 for (i=0; i < cmd->o.arg1; i++) 922 if (map[i/32] & (1<<(i & 31))) { 923 for (j=i+1; j < cmd->o.arg1; j++) 924 if (!(map[ j/32] & (1<<(j & 31)))) 925 break; 926 printf("%c%d", comma, i+x); 927 if (j>i+2) { /* range has at least 3 elements */ 928 printf("-%d", j-1+x); 929 i = j-1; 930 } 931 comma = ','; 932 } 933 printf("}"); 934 return; 935 } 936 /* 937 * len == 2 indicates a single IP, whereas lists of 1 or more 938 * addr/mask pairs have len = (2n+1). We convert len to n so we 939 * use that to count the number of entries. 940 */ 941 for (len = len / 2; len > 0; len--, a += 2) { 942 int mb = /* mask length */ 943 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 944 32 : contigmask((uint8_t *)&(a[1]), 32); 945 if (mb == 32 && do_resolv) 946 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 947 if (he != NULL) /* resolved to name */ 948 printf("%s", he->h_name); 949 else if (mb == 0) /* any */ 950 printf("any"); 951 else { /* numeric IP followed by some kind of mask */ 952 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 953 if (mb < 0) 954 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 955 else if (mb < 32) 956 printf("/%d", mb); 957 } 958 if (len > 1) 959 printf(","); 960 } 961 } 962 963 /* 964 * prints a MAC address/mask pair 965 */ 966 static void 967 print_mac(uint8_t *addr, uint8_t *mask) 968 { 969 int l = contigmask(mask, 48); 970 971 if (l == 0) 972 printf(" any"); 973 else { 974 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 975 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 976 if (l == -1) 977 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 978 mask[0], mask[1], mask[2], 979 mask[3], mask[4], mask[5]); 980 else if (l < 48) 981 printf("/%d", l); 982 } 983 } 984 985 static void 986 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 987 { 988 uint8_t type; 989 990 cmd->d[0] = 0; 991 while (*av) { 992 if (*av == ',') 993 av++; 994 995 type = strtoul(av, &av, 0); 996 997 if (*av != ',' && *av != '\0') 998 errx(EX_DATAERR, "invalid ICMP type"); 999 1000 if (type > 31) 1001 errx(EX_DATAERR, "ICMP type out of range"); 1002 1003 cmd->d[0] |= 1 << type; 1004 } 1005 cmd->o.opcode = O_ICMPTYPE; 1006 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1007 } 1008 1009 static void 1010 print_icmptypes(ipfw_insn_u32 *cmd) 1011 { 1012 int i; 1013 char sep= ' '; 1014 1015 printf(" icmptypes"); 1016 for (i = 0; i < 32; i++) { 1017 if ( (cmd->d[0] & (1 << (i))) == 0) 1018 continue; 1019 printf("%c%d", sep, i); 1020 sep = ','; 1021 } 1022 } 1023 1024 /* 1025 * show_ipfw() prints the body of an ipfw rule. 1026 * Because the standard rule has at least proto src_ip dst_ip, we use 1027 * a helper function to produce these entries if not provided explicitly. 1028 * The first argument is the list of fields we have, the second is 1029 * the list of fields we want to be printed. 1030 * 1031 * Special cases if we have provided a MAC header: 1032 * + if the rule does not contain IP addresses/ports, do not print them; 1033 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1034 * 1035 * Once we have 'have_options', IP header fields are printed as options. 1036 */ 1037 #define HAVE_PROTO 0x0001 1038 #define HAVE_SRCIP 0x0002 1039 #define HAVE_DSTIP 0x0004 1040 #define HAVE_MAC 0x0008 1041 #define HAVE_MACTYPE 0x0010 1042 #define HAVE_OPTIONS 0x8000 1043 1044 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1045 static void 1046 show_prerequisites(int *flags, int want, int cmd) 1047 { 1048 if (comment_only) 1049 return; 1050 if ( (*flags & HAVE_IP) == HAVE_IP) 1051 *flags |= HAVE_OPTIONS; 1052 1053 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 1054 cmd != O_MAC_TYPE) { 1055 /* 1056 * mac-type was optimized out by the compiler, 1057 * restore it 1058 */ 1059 printf(" any"); 1060 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 1061 return; 1062 } 1063 if ( !(*flags & HAVE_OPTIONS)) { 1064 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1065 printf(" ip"); 1066 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1067 printf(" from any"); 1068 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1069 printf(" to any"); 1070 } 1071 *flags |= want; 1072 } 1073 1074 static void 1075 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1076 { 1077 static int twidth = 0; 1078 int l; 1079 ipfw_insn *cmd; 1080 char *comment = NULL; /* ptr to comment if we have one */ 1081 int proto = 0; /* default */ 1082 int flags = 0; /* prerequisites */ 1083 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1084 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1085 int or_block = 0; /* we are in an or block */ 1086 uint32_t set_disable; 1087 1088 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1089 1090 if (set_disable & (1 << rule->set)) { /* disabled */ 1091 if (!show_sets) 1092 return; 1093 else 1094 printf("# DISABLED "); 1095 } 1096 printf("%05u ", rule->rulenum); 1097 1098 if (pcwidth>0 || bcwidth>0) 1099 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1100 bcwidth, align_uint64(&rule->bcnt)); 1101 1102 if (do_time == 2) 1103 printf("%10u ", rule->timestamp); 1104 else if (do_time == 1) { 1105 char timestr[30]; 1106 time_t t = (time_t)0; 1107 1108 if (twidth == 0) { 1109 strcpy(timestr, ctime(&t)); 1110 *strchr(timestr, '\n') = '\0'; 1111 twidth = strlen(timestr); 1112 } 1113 if (rule->timestamp) { 1114 #if _FreeBSD_version < 500000 /* XXX check */ 1115 #define _long_to_time(x) (time_t)(x) 1116 #endif 1117 t = _long_to_time(rule->timestamp); 1118 1119 strcpy(timestr, ctime(&t)); 1120 *strchr(timestr, '\n') = '\0'; 1121 printf("%s ", timestr); 1122 } else { 1123 printf("%*s", twidth, " "); 1124 } 1125 } 1126 1127 if (show_sets) 1128 printf("set %d ", rule->set); 1129 1130 /* 1131 * print the optional "match probability" 1132 */ 1133 if (rule->cmd_len > 0) { 1134 cmd = rule->cmd ; 1135 if (cmd->opcode == O_PROB) { 1136 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1137 double d = 1.0 * p->d[0]; 1138 1139 d = (d / 0x7fffffff); 1140 printf("prob %f ", d); 1141 } 1142 } 1143 1144 /* 1145 * first print actions 1146 */ 1147 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1148 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1149 switch(cmd->opcode) { 1150 case O_CHECK_STATE: 1151 printf("check-state"); 1152 flags = HAVE_IP; /* avoid printing anything else */ 1153 break; 1154 1155 case O_ACCEPT: 1156 printf("allow"); 1157 break; 1158 1159 case O_COUNT: 1160 printf("count"); 1161 break; 1162 1163 case O_DENY: 1164 printf("deny"); 1165 break; 1166 1167 case O_REJECT: 1168 if (cmd->arg1 == ICMP_REJECT_RST) 1169 printf("reset"); 1170 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1171 printf("reject"); 1172 else 1173 print_reject_code(cmd->arg1); 1174 break; 1175 1176 case O_SKIPTO: 1177 printf("skipto %u", cmd->arg1); 1178 break; 1179 1180 case O_PIPE: 1181 printf("pipe %u", cmd->arg1); 1182 break; 1183 1184 case O_QUEUE: 1185 printf("queue %u", cmd->arg1); 1186 break; 1187 1188 case O_DIVERT: 1189 printf("divert %u", cmd->arg1); 1190 break; 1191 1192 case O_TEE: 1193 printf("tee %u", cmd->arg1); 1194 break; 1195 1196 case O_FORWARD_IP: 1197 { 1198 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1199 1200 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1201 if (s->sa.sin_port) 1202 printf(",%d", s->sa.sin_port); 1203 } 1204 break; 1205 1206 case O_LOG: /* O_LOG is printed last */ 1207 logptr = (ipfw_insn_log *)cmd; 1208 break; 1209 1210 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1211 altqptr = (ipfw_insn_altq *)cmd; 1212 break; 1213 1214 default: 1215 printf("** unrecognized action %d len %d ", 1216 cmd->opcode, cmd->len); 1217 } 1218 } 1219 if (logptr) { 1220 if (logptr->max_log > 0) 1221 printf(" log logamount %d", logptr->max_log); 1222 else 1223 printf(" log"); 1224 } 1225 if (altqptr) { 1226 const char *qname; 1227 1228 qname = altq_qid_to_name(altqptr->qid); 1229 if (qname == NULL) 1230 printf(" altq ?<%u>", altqptr->qid); 1231 else 1232 printf(" altq %s", qname); 1233 } 1234 1235 /* 1236 * then print the body. 1237 */ 1238 if (rule->_pad & 1) { /* empty rules before options */ 1239 if (!do_compact) 1240 printf(" ip from any to any"); 1241 flags |= HAVE_IP | HAVE_OPTIONS; 1242 } 1243 1244 if (comment_only) 1245 comment = "..."; 1246 1247 for (l = rule->act_ofs, cmd = rule->cmd ; 1248 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1249 /* useful alias */ 1250 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1251 1252 if (comment_only) { 1253 if (cmd->opcode != O_NOP) 1254 continue; 1255 printf(" // %s\n", (char *)(cmd + 1)); 1256 return; 1257 } 1258 1259 show_prerequisites(&flags, 0, cmd->opcode); 1260 1261 switch(cmd->opcode) { 1262 case O_PROB: 1263 break; /* done already */ 1264 1265 case O_PROBE_STATE: 1266 break; /* no need to print anything here */ 1267 1268 case O_MACADDR2: { 1269 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1270 1271 if ((cmd->len & F_OR) && !or_block) 1272 printf(" {"); 1273 if (cmd->len & F_NOT) 1274 printf(" not"); 1275 printf(" MAC"); 1276 flags |= HAVE_MAC; 1277 print_mac(m->addr, m->mask); 1278 print_mac(m->addr + 6, m->mask + 6); 1279 } 1280 break; 1281 1282 case O_MAC_TYPE: 1283 if ((cmd->len & F_OR) && !or_block) 1284 printf(" {"); 1285 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1286 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1287 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1288 break; 1289 1290 case O_IP_SRC: 1291 case O_IP_SRC_LOOKUP: 1292 case O_IP_SRC_MASK: 1293 case O_IP_SRC_ME: 1294 case O_IP_SRC_SET: 1295 show_prerequisites(&flags, HAVE_PROTO, 0); 1296 if (!(flags & HAVE_SRCIP)) 1297 printf(" from"); 1298 if ((cmd->len & F_OR) && !or_block) 1299 printf(" {"); 1300 print_ip((ipfw_insn_ip *)cmd, 1301 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1302 flags |= HAVE_SRCIP; 1303 break; 1304 1305 case O_IP_DST: 1306 case O_IP_DST_LOOKUP: 1307 case O_IP_DST_MASK: 1308 case O_IP_DST_ME: 1309 case O_IP_DST_SET: 1310 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1311 if (!(flags & HAVE_DSTIP)) 1312 printf(" to"); 1313 if ((cmd->len & F_OR) && !or_block) 1314 printf(" {"); 1315 print_ip((ipfw_insn_ip *)cmd, 1316 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1317 flags |= HAVE_DSTIP; 1318 break; 1319 1320 case O_IP_DSTPORT: 1321 show_prerequisites(&flags, HAVE_IP, 0); 1322 case O_IP_SRCPORT: 1323 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1324 if ((cmd->len & F_OR) && !or_block) 1325 printf(" {"); 1326 print_newports((ipfw_insn_u16 *)cmd, proto, 1327 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1328 break; 1329 1330 case O_PROTO: { 1331 struct protoent *pe; 1332 1333 if ((cmd->len & F_OR) && !or_block) 1334 printf(" {"); 1335 if (cmd->len & F_NOT) 1336 printf(" not"); 1337 proto = cmd->arg1; 1338 pe = getprotobynumber(cmd->arg1); 1339 if (flags & HAVE_OPTIONS) 1340 printf(" proto"); 1341 if (pe) 1342 printf(" %s", pe->p_name); 1343 else 1344 printf(" %u", cmd->arg1); 1345 } 1346 flags |= HAVE_PROTO; 1347 break; 1348 1349 default: /*options ... */ 1350 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1351 if ((cmd->len & F_OR) && !or_block) 1352 printf(" {"); 1353 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1354 printf(" not"); 1355 switch(cmd->opcode) { 1356 case O_FRAG: 1357 printf(" frag"); 1358 break; 1359 1360 case O_IN: 1361 printf(cmd->len & F_NOT ? " out" : " in"); 1362 break; 1363 1364 case O_DIVERTED: 1365 switch (cmd->arg1) { 1366 case 3: 1367 printf(" diverted"); 1368 break; 1369 case 1: 1370 printf(" diverted-loopback"); 1371 break; 1372 case 2: 1373 printf(" diverted-output"); 1374 break; 1375 default: 1376 printf(" diverted-?<%u>", cmd->arg1); 1377 break; 1378 } 1379 break; 1380 1381 case O_LAYER2: 1382 printf(" layer2"); 1383 break; 1384 case O_XMIT: 1385 case O_RECV: 1386 case O_VIA: { 1387 char const *s; 1388 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1389 1390 if (cmd->opcode == O_XMIT) 1391 s = "xmit"; 1392 else if (cmd->opcode == O_RECV) 1393 s = "recv"; 1394 else /* if (cmd->opcode == O_VIA) */ 1395 s = "via"; 1396 if (cmdif->name[0] == '\0') 1397 printf(" %s %s", s, 1398 inet_ntoa(cmdif->p.ip)); 1399 printf(" %s %s", s, cmdif->name); 1400 } 1401 break; 1402 1403 case O_IPID: 1404 if (F_LEN(cmd) == 1) 1405 printf(" ipid %u", cmd->arg1 ); 1406 else 1407 print_newports((ipfw_insn_u16 *)cmd, 0, 1408 O_IPID); 1409 break; 1410 1411 case O_IPTTL: 1412 if (F_LEN(cmd) == 1) 1413 printf(" ipttl %u", cmd->arg1 ); 1414 else 1415 print_newports((ipfw_insn_u16 *)cmd, 0, 1416 O_IPTTL); 1417 break; 1418 1419 case O_IPVER: 1420 printf(" ipver %u", cmd->arg1 ); 1421 break; 1422 1423 case O_IPPRECEDENCE: 1424 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1425 break; 1426 1427 case O_IPLEN: 1428 if (F_LEN(cmd) == 1) 1429 printf(" iplen %u", cmd->arg1 ); 1430 else 1431 print_newports((ipfw_insn_u16 *)cmd, 0, 1432 O_IPLEN); 1433 break; 1434 1435 case O_IPOPT: 1436 print_flags("ipoptions", cmd, f_ipopts); 1437 break; 1438 1439 case O_IPTOS: 1440 print_flags("iptos", cmd, f_iptos); 1441 break; 1442 1443 case O_ICMPTYPE: 1444 print_icmptypes((ipfw_insn_u32 *)cmd); 1445 break; 1446 1447 case O_ESTAB: 1448 printf(" established"); 1449 break; 1450 1451 case O_TCPDATALEN: 1452 if (F_LEN(cmd) == 1) 1453 printf(" tcpdatalen %u", cmd->arg1 ); 1454 else 1455 print_newports((ipfw_insn_u16 *)cmd, 0, 1456 O_TCPDATALEN); 1457 break; 1458 1459 case O_TCPFLAGS: 1460 print_flags("tcpflags", cmd, f_tcpflags); 1461 break; 1462 1463 case O_TCPOPTS: 1464 print_flags("tcpoptions", cmd, f_tcpopts); 1465 break; 1466 1467 case O_TCPWIN: 1468 printf(" tcpwin %d", ntohs(cmd->arg1)); 1469 break; 1470 1471 case O_TCPACK: 1472 printf(" tcpack %d", ntohl(cmd32->d[0])); 1473 break; 1474 1475 case O_TCPSEQ: 1476 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1477 break; 1478 1479 case O_UID: 1480 { 1481 struct passwd *pwd = getpwuid(cmd32->d[0]); 1482 1483 if (pwd) 1484 printf(" uid %s", pwd->pw_name); 1485 else 1486 printf(" uid %u", cmd32->d[0]); 1487 } 1488 break; 1489 1490 case O_GID: 1491 { 1492 struct group *grp = getgrgid(cmd32->d[0]); 1493 1494 if (grp) 1495 printf(" gid %s", grp->gr_name); 1496 else 1497 printf(" gid %u", cmd32->d[0]); 1498 } 1499 break; 1500 1501 case O_JAIL: 1502 printf(" jail %d", cmd32->d[0]); 1503 break; 1504 1505 case O_VERREVPATH: 1506 printf(" verrevpath"); 1507 break; 1508 1509 case O_VERSRCREACH: 1510 printf(" versrcreach"); 1511 break; 1512 1513 case O_ANTISPOOF: 1514 printf(" antispoof"); 1515 break; 1516 1517 case O_IPSEC: 1518 printf(" ipsec"); 1519 break; 1520 1521 case O_NOP: 1522 comment = (char *)(cmd + 1); 1523 break; 1524 1525 case O_KEEP_STATE: 1526 printf(" keep-state"); 1527 break; 1528 1529 case O_LIMIT: 1530 { 1531 struct _s_x *p = limit_masks; 1532 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1533 uint8_t x = c->limit_mask; 1534 char const *comma = " "; 1535 1536 printf(" limit"); 1537 for (; p->x != 0 ; p++) 1538 if ((x & p->x) == p->x) { 1539 x &= ~p->x; 1540 printf("%s%s", comma, p->s); 1541 comma = ","; 1542 } 1543 printf(" %d", c->conn_limit); 1544 } 1545 break; 1546 1547 default: 1548 printf(" [opcode %d len %d]", 1549 cmd->opcode, cmd->len); 1550 } 1551 } 1552 if (cmd->len & F_OR) { 1553 printf(" or"); 1554 or_block = 1; 1555 } else if (or_block) { 1556 printf(" }"); 1557 or_block = 0; 1558 } 1559 } 1560 show_prerequisites(&flags, HAVE_IP, 0); 1561 if (comment) 1562 printf(" // %s", comment); 1563 printf("\n"); 1564 } 1565 1566 static void 1567 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1568 { 1569 struct protoent *pe; 1570 struct in_addr a; 1571 uint16_t rulenum; 1572 1573 if (!do_expired) { 1574 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1575 return; 1576 } 1577 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1578 printf("%05d", rulenum); 1579 if (pcwidth>0 || bcwidth>0) 1580 printf(" %*llu %*llu (%ds)", pcwidth, 1581 align_uint64(&d->pcnt), bcwidth, 1582 align_uint64(&d->bcnt), d->expire); 1583 switch (d->dyn_type) { 1584 case O_LIMIT_PARENT: 1585 printf(" PARENT %d", d->count); 1586 break; 1587 case O_LIMIT: 1588 printf(" LIMIT"); 1589 break; 1590 case O_KEEP_STATE: /* bidir, no mask */ 1591 printf(" STATE"); 1592 break; 1593 } 1594 1595 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1596 printf(" %s", pe->p_name); 1597 else 1598 printf(" proto %u", d->id.proto); 1599 1600 a.s_addr = htonl(d->id.src_ip); 1601 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1602 1603 a.s_addr = htonl(d->id.dst_ip); 1604 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1605 printf("\n"); 1606 } 1607 1608 static int 1609 sort_q(const void *pa, const void *pb) 1610 { 1611 int rev = (do_sort < 0); 1612 int field = rev ? -do_sort : do_sort; 1613 long long res = 0; 1614 const struct dn_flow_queue *a = pa; 1615 const struct dn_flow_queue *b = pb; 1616 1617 switch (field) { 1618 case 1: /* pkts */ 1619 res = a->len - b->len; 1620 break; 1621 case 2: /* bytes */ 1622 res = a->len_bytes - b->len_bytes; 1623 break; 1624 1625 case 3: /* tot pkts */ 1626 res = a->tot_pkts - b->tot_pkts; 1627 break; 1628 1629 case 4: /* tot bytes */ 1630 res = a->tot_bytes - b->tot_bytes; 1631 break; 1632 } 1633 if (res < 0) 1634 res = -1; 1635 if (res > 0) 1636 res = 1; 1637 return (int)(rev ? res : -res); 1638 } 1639 1640 static void 1641 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1642 { 1643 int l; 1644 1645 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1646 fs->flow_mask.proto, 1647 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1648 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1649 if (fs->rq_elements == 0) 1650 return; 1651 1652 printf("BKT Prot ___Source IP/port____ " 1653 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1654 if (do_sort != 0) 1655 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1656 for (l = 0; l < fs->rq_elements; l++) { 1657 struct in_addr ina; 1658 struct protoent *pe; 1659 1660 ina.s_addr = htonl(q[l].id.src_ip); 1661 printf("%3d ", q[l].hash_slot); 1662 pe = getprotobynumber(q[l].id.proto); 1663 if (pe) 1664 printf("%-4s ", pe->p_name); 1665 else 1666 printf("%4u ", q[l].id.proto); 1667 printf("%15s/%-5d ", 1668 inet_ntoa(ina), q[l].id.src_port); 1669 ina.s_addr = htonl(q[l].id.dst_ip); 1670 printf("%15s/%-5d ", 1671 inet_ntoa(ina), q[l].id.dst_port); 1672 printf("%4qu %8qu %2u %4u %3u\n", 1673 q[l].tot_pkts, q[l].tot_bytes, 1674 q[l].len, q[l].len_bytes, q[l].drops); 1675 if (verbose) 1676 printf(" S %20qd F %20qd\n", 1677 q[l].S, q[l].F); 1678 } 1679 } 1680 1681 static void 1682 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 1683 { 1684 int l; 1685 char qs[30]; 1686 char plr[30]; 1687 char red[90]; /* Display RED parameters */ 1688 1689 l = fs->qsize; 1690 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1691 if (l >= 8192) 1692 sprintf(qs, "%d KB", l / 1024); 1693 else 1694 sprintf(qs, "%d B", l); 1695 } else 1696 sprintf(qs, "%3d sl.", l); 1697 if (fs->plr) 1698 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1699 else 1700 plr[0] = '\0'; 1701 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1702 sprintf(red, 1703 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1704 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1705 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1706 SCALE_VAL(fs->min_th), 1707 SCALE_VAL(fs->max_th), 1708 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1709 else 1710 sprintf(red, "droptail"); 1711 1712 printf("%s %s%s %d queues (%d buckets) %s\n", 1713 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1714 } 1715 1716 static void 1717 list_pipes(void *data, uint nbytes, int ac, char *av[]) 1718 { 1719 int rulenum; 1720 void *next = data; 1721 struct dn_pipe *p = (struct dn_pipe *) data; 1722 struct dn_flow_set *fs; 1723 struct dn_flow_queue *q; 1724 int l; 1725 1726 if (ac > 0) 1727 rulenum = strtoul(*av++, NULL, 10); 1728 else 1729 rulenum = 0; 1730 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 1731 double b = p->bandwidth; 1732 char buf[30]; 1733 char prefix[80]; 1734 1735 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 1736 break; /* done with pipes, now queues */ 1737 1738 /* 1739 * compute length, as pipe have variable size 1740 */ 1741 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1742 next = (char *)p + l; 1743 nbytes -= l; 1744 1745 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 1746 continue; 1747 1748 /* 1749 * Print rate (or clocking interface) 1750 */ 1751 if (p->if_name[0] != '\0') 1752 sprintf(buf, "%s", p->if_name); 1753 else if (b == 0) 1754 sprintf(buf, "unlimited"); 1755 else if (b >= 1000000) 1756 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1757 else if (b >= 1000) 1758 sprintf(buf, "%7.3f Kbit/s", b/1000); 1759 else 1760 sprintf(buf, "%7.3f bit/s ", b); 1761 1762 sprintf(prefix, "%05d: %s %4d ms ", 1763 p->pipe_nr, buf, p->delay); 1764 print_flowset_parms(&(p->fs), prefix); 1765 if (verbose) 1766 printf(" V %20qd\n", p->V >> MY_M); 1767 1768 q = (struct dn_flow_queue *)(p+1); 1769 list_queues(&(p->fs), q); 1770 } 1771 for (fs = next; nbytes >= sizeof *fs; fs = next) { 1772 char prefix[80]; 1773 1774 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 1775 break; 1776 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1777 next = (char *)fs + l; 1778 nbytes -= l; 1779 1780 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 1781 (rulenum != fs->parent_nr && do_pipe == 1))) { 1782 continue; 1783 } 1784 1785 q = (struct dn_flow_queue *)(fs+1); 1786 sprintf(prefix, "q%05d: weight %d pipe %d ", 1787 fs->fs_nr, fs->weight, fs->parent_nr); 1788 print_flowset_parms(fs, prefix); 1789 list_queues(fs, q); 1790 } 1791 } 1792 1793 /* 1794 * This one handles all set-related commands 1795 * ipfw set { show | enable | disable } 1796 * ipfw set swap X Y 1797 * ipfw set move X to Y 1798 * ipfw set move rule X to Y 1799 */ 1800 static void 1801 sets_handler(int ac, char *av[]) 1802 { 1803 uint32_t set_disable, masks[2]; 1804 int i, nbytes; 1805 uint16_t rulenum; 1806 uint8_t cmd, new_set; 1807 1808 ac--; 1809 av++; 1810 1811 if (!ac) 1812 errx(EX_USAGE, "set needs command"); 1813 if (_substrcmp(*av, "show") == 0) { 1814 void *data; 1815 char const *msg; 1816 1817 nbytes = sizeof(struct ip_fw); 1818 if ((data = calloc(1, nbytes)) == NULL) 1819 err(EX_OSERR, "calloc"); 1820 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 1821 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1822 bcopy(&((struct ip_fw *)data)->next_rule, 1823 &set_disable, sizeof(set_disable)); 1824 1825 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 1826 if ((set_disable & (1<<i))) { 1827 printf("%s %d", msg, i); 1828 msg = ""; 1829 } 1830 msg = (set_disable) ? " enable" : "enable"; 1831 for (i = 0; i < RESVD_SET; i++) 1832 if (!(set_disable & (1<<i))) { 1833 printf("%s %d", msg, i); 1834 msg = ""; 1835 } 1836 printf("\n"); 1837 } else if (_substrcmp(*av, "swap") == 0) { 1838 ac--; av++; 1839 if (ac != 2) 1840 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1841 rulenum = atoi(av[0]); 1842 new_set = atoi(av[1]); 1843 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 1844 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1845 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 1846 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1847 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1848 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 1849 } else if (_substrcmp(*av, "move") == 0) { 1850 ac--; av++; 1851 if (ac && _substrcmp(*av, "rule") == 0) { 1852 cmd = 2; 1853 ac--; av++; 1854 } else 1855 cmd = 3; 1856 if (ac != 3 || _substrcmp(av[1], "to") != 0) 1857 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1858 rulenum = atoi(av[0]); 1859 new_set = atoi(av[2]); 1860 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 1861 (cmd == 2 && rulenum == 65535) ) 1862 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1863 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 1864 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1865 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1866 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 1867 } else if (_substrcmp(*av, "disable") == 0 || 1868 _substrcmp(*av, "enable") == 0 ) { 1869 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 1870 1871 ac--; av++; 1872 masks[0] = masks[1] = 0; 1873 1874 while (ac) { 1875 if (isdigit(**av)) { 1876 i = atoi(*av); 1877 if (i < 0 || i > RESVD_SET) 1878 errx(EX_DATAERR, 1879 "invalid set number %d\n", i); 1880 masks[which] |= (1<<i); 1881 } else if (_substrcmp(*av, "disable") == 0) 1882 which = 0; 1883 else if (_substrcmp(*av, "enable") == 0) 1884 which = 1; 1885 else 1886 errx(EX_DATAERR, 1887 "invalid set command %s\n", *av); 1888 av++; ac--; 1889 } 1890 if ( (masks[0] & masks[1]) != 0 ) 1891 errx(EX_DATAERR, 1892 "cannot enable and disable the same set\n"); 1893 1894 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 1895 if (i) 1896 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1897 } else 1898 errx(EX_USAGE, "invalid set command %s\n", *av); 1899 } 1900 1901 static void 1902 sysctl_handler(int ac, char *av[], int which) 1903 { 1904 ac--; 1905 av++; 1906 1907 if (ac == 0) { 1908 warnx("missing keyword to enable/disable\n"); 1909 } else if (_substrcmp(*av, "firewall") == 0) { 1910 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1911 &which, sizeof(which)); 1912 } else if (_substrcmp(*av, "one_pass") == 0) { 1913 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1914 &which, sizeof(which)); 1915 } else if (_substrcmp(*av, "debug") == 0) { 1916 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1917 &which, sizeof(which)); 1918 } else if (_substrcmp(*av, "verbose") == 0) { 1919 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1920 &which, sizeof(which)); 1921 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 1922 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1923 &which, sizeof(which)); 1924 } else if (_substrcmp(*av, "altq") == 0) { 1925 altq_set_enabled(which); 1926 } else { 1927 warnx("unrecognize enable/disable keyword: %s\n", *av); 1928 } 1929 } 1930 1931 static void 1932 list(int ac, char *av[], int show_counters) 1933 { 1934 struct ip_fw *r; 1935 ipfw_dyn_rule *dynrules, *d; 1936 1937 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 1938 char *lim; 1939 void *data = NULL; 1940 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1941 int exitval = EX_OK; 1942 int lac; 1943 char **lav; 1944 u_long rnum, last; 1945 char *endptr; 1946 int seen = 0; 1947 1948 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1949 int nalloc = 1024; /* start somewhere... */ 1950 1951 last = 0; 1952 1953 if (test_only) { 1954 fprintf(stderr, "Testing only, list disabled\n"); 1955 return; 1956 } 1957 1958 ac--; 1959 av++; 1960 1961 /* get rules or pipes from kernel, resizing array as necessary */ 1962 nbytes = nalloc; 1963 1964 while (nbytes >= nalloc) { 1965 nalloc = nalloc * 2 + 200; 1966 nbytes = nalloc; 1967 if ((data = realloc(data, nbytes)) == NULL) 1968 err(EX_OSERR, "realloc"); 1969 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 1970 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1971 do_pipe ? "DUMMYNET" : "FW"); 1972 } 1973 1974 if (do_pipe) { 1975 list_pipes(data, nbytes, ac, av); 1976 goto done; 1977 } 1978 1979 /* 1980 * Count static rules. They have variable size so we 1981 * need to scan the list to count them. 1982 */ 1983 for (nstat = 1, r = data, lim = (char *)data + nbytes; 1984 r->rulenum < 65535 && (char *)r < lim; 1985 ++nstat, r = NEXT(r) ) 1986 ; /* nothing */ 1987 1988 /* 1989 * Count dynamic rules. This is easier as they have 1990 * fixed size. 1991 */ 1992 r = NEXT(r); 1993 dynrules = (ipfw_dyn_rule *)r ; 1994 n = (char *)r - (char *)data; 1995 ndyn = (nbytes - n) / sizeof *dynrules; 1996 1997 /* if showing stats, figure out column widths ahead of time */ 1998 bcwidth = pcwidth = 0; 1999 if (show_counters) { 2000 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2001 /* packet counter */ 2002 width = snprintf(NULL, 0, "%llu", 2003 align_uint64(&r->pcnt)); 2004 if (width > pcwidth) 2005 pcwidth = width; 2006 2007 /* byte counter */ 2008 width = snprintf(NULL, 0, "%llu", 2009 align_uint64(&r->bcnt)); 2010 if (width > bcwidth) 2011 bcwidth = width; 2012 } 2013 } 2014 if (do_dynamic && ndyn) { 2015 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2016 width = snprintf(NULL, 0, "%llu", 2017 align_uint64(&d->pcnt)); 2018 if (width > pcwidth) 2019 pcwidth = width; 2020 2021 width = snprintf(NULL, 0, "%llu", 2022 align_uint64(&d->bcnt)); 2023 if (width > bcwidth) 2024 bcwidth = width; 2025 } 2026 } 2027 /* if no rule numbers were specified, list all rules */ 2028 if (ac == 0) { 2029 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2030 show_ipfw(r, pcwidth, bcwidth); 2031 2032 if (do_dynamic && ndyn) { 2033 printf("## Dynamic rules (%d):\n", ndyn); 2034 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2035 show_dyn_ipfw(d, pcwidth, bcwidth); 2036 } 2037 goto done; 2038 } 2039 2040 /* display specific rules requested on command line */ 2041 2042 for (lac = ac, lav = av; lac != 0; lac--) { 2043 /* convert command line rule # */ 2044 last = rnum = strtoul(*lav++, &endptr, 10); 2045 if (*endptr == '-') 2046 last = strtoul(endptr+1, &endptr, 10); 2047 if (*endptr) { 2048 exitval = EX_USAGE; 2049 warnx("invalid rule number: %s", *(lav - 1)); 2050 continue; 2051 } 2052 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2053 if (r->rulenum > last) 2054 break; 2055 if (r->rulenum >= rnum && r->rulenum <= last) { 2056 show_ipfw(r, pcwidth, bcwidth); 2057 seen = 1; 2058 } 2059 } 2060 if (!seen) { 2061 /* give precedence to other error(s) */ 2062 if (exitval == EX_OK) 2063 exitval = EX_UNAVAILABLE; 2064 warnx("rule %lu does not exist", rnum); 2065 } 2066 } 2067 2068 if (do_dynamic && ndyn) { 2069 printf("## Dynamic rules:\n"); 2070 for (lac = ac, lav = av; lac != 0; lac--) { 2071 rnum = strtoul(*lav++, &endptr, 10); 2072 if (*endptr == '-') 2073 last = strtoul(endptr+1, &endptr, 10); 2074 if (*endptr) 2075 /* already warned */ 2076 continue; 2077 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2078 uint16_t rulenum; 2079 2080 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2081 if (rulenum > rnum) 2082 break; 2083 if (r->rulenum >= rnum && r->rulenum <= last) 2084 show_dyn_ipfw(d, pcwidth, bcwidth); 2085 } 2086 } 2087 } 2088 2089 ac = 0; 2090 2091 done: 2092 free(data); 2093 2094 if (exitval != EX_OK) 2095 exit(exitval); 2096 #undef NEXT 2097 } 2098 2099 static void 2100 show_usage(void) 2101 { 2102 fprintf(stderr, "usage: ipfw [options]\n" 2103 "do \"ipfw -h\" or see ipfw manpage for details\n" 2104 ); 2105 exit(EX_USAGE); 2106 } 2107 2108 static void 2109 help(void) 2110 { 2111 fprintf(stderr, 2112 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2113 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2114 "add [num] [set N] [prob x] RULE-BODY\n" 2115 "{pipe|queue} N config PIPE-BODY\n" 2116 "[pipe|queue] {zero|delete|show} [N{,N}]\n" 2117 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2118 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2119 "\n" 2120 "RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2121 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 2122 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 2123 "PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2124 "ADDR: [ MAC dst src ether_type ] \n" 2125 " [ from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2126 "IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2127 "IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2128 "OPTION_LIST: OPTION [OPTION_LIST]\n" 2129 "OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2130 " {dst-ip|src-ip} ADDR | {dst-port|src-port} LIST |\n" 2131 " estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2132 " iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2133 " ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2134 " mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2135 " setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2136 " tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2137 ); 2138 exit(0); 2139 } 2140 2141 2142 static int 2143 lookup_host (char *host, struct in_addr *ipaddr) 2144 { 2145 struct hostent *he; 2146 2147 if (!inet_aton(host, ipaddr)) { 2148 if ((he = gethostbyname(host)) == NULL) 2149 return(-1); 2150 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2151 } 2152 return(0); 2153 } 2154 2155 /* 2156 * fills the addr and mask fields in the instruction as appropriate from av. 2157 * Update length as appropriate. 2158 * The following formats are allowed: 2159 * any matches any IP. Actually returns an empty instruction. 2160 * me returns O_IP_*_ME 2161 * 1.2.3.4 single IP address 2162 * 1.2.3.4:5.6.7.8 address:mask 2163 * 1.2.3.4/24 address/mask 2164 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2165 * We can have multiple comma-separated address/mask entries. 2166 */ 2167 static void 2168 fill_ip(ipfw_insn_ip *cmd, char *av) 2169 { 2170 int len = 0; 2171 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2172 2173 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2174 2175 if (_substrcmp(av, "any") == 0) 2176 return; 2177 2178 if (_substrcmp(av, "me") == 0) { 2179 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2180 return; 2181 } 2182 2183 if (strncmp(av, "table(", 6) == 0) { 2184 char *p = strchr(av + 6, ','); 2185 2186 if (p) 2187 *p++ = '\0'; 2188 cmd->o.opcode = O_IP_DST_LOOKUP; 2189 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2190 if (p) { 2191 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2192 d[0] = strtoul(p, NULL, 0); 2193 } else 2194 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2195 return; 2196 } 2197 2198 while (av) { 2199 /* 2200 * After the address we can have '/' or ':' indicating a mask, 2201 * ',' indicating another address follows, '{' indicating a 2202 * set of addresses of unspecified size. 2203 */ 2204 char *p = strpbrk(av, "/:,{"); 2205 int masklen; 2206 char md; 2207 2208 if (p) { 2209 md = *p; 2210 *p++ = '\0'; 2211 } else 2212 md = '\0'; 2213 2214 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2215 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2216 switch (md) { 2217 case ':': 2218 if (!inet_aton(p, (struct in_addr *)&d[1])) 2219 errx(EX_DATAERR, "bad netmask ``%s''", p); 2220 break; 2221 case '/': 2222 masklen = atoi(p); 2223 if (masklen == 0) 2224 d[1] = htonl(0); /* mask */ 2225 else if (masklen > 32) 2226 errx(EX_DATAERR, "bad width ``%s''", p); 2227 else 2228 d[1] = htonl(~0 << (32 - masklen)); 2229 break; 2230 case '{': /* no mask, assume /24 and put back the '{' */ 2231 d[1] = htonl(~0 << (32 - 24)); 2232 *(--p) = md; 2233 break; 2234 2235 case ',': /* single address plus continuation */ 2236 *(--p) = md; 2237 /* FALLTHROUGH */ 2238 case 0: /* initialization value */ 2239 default: 2240 d[1] = htonl(~0); /* force /32 */ 2241 break; 2242 } 2243 d[0] &= d[1]; /* mask base address with mask */ 2244 /* find next separator */ 2245 if (p) 2246 p = strpbrk(p, ",{"); 2247 if (p && *p == '{') { 2248 /* 2249 * We have a set of addresses. They are stored as follows: 2250 * arg1 is the set size (powers of 2, 2..256) 2251 * addr is the base address IN HOST FORMAT 2252 * mask.. is an array of arg1 bits (rounded up to 2253 * the next multiple of 32) with bits set 2254 * for each host in the map. 2255 */ 2256 uint32_t *map = (uint32_t *)&cmd->mask; 2257 int low, high; 2258 int i = contigmask((uint8_t *)&(d[1]), 32); 2259 2260 if (len > 0) 2261 errx(EX_DATAERR, "address set cannot be in a list"); 2262 if (i < 24 || i > 31) 2263 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2264 cmd->o.arg1 = 1<<(32-i); /* map length */ 2265 d[0] = ntohl(d[0]); /* base addr in host format */ 2266 cmd->o.opcode = O_IP_DST_SET; /* default */ 2267 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2268 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2269 map[i] = 0; /* clear map */ 2270 2271 av = p + 1; 2272 low = d[0] & 0xff; 2273 high = low + cmd->o.arg1 - 1; 2274 /* 2275 * Here, i stores the previous value when we specify a range 2276 * of addresses within a mask, e.g. 45-63. i = -1 means we 2277 * have no previous value. 2278 */ 2279 i = -1; /* previous value in a range */ 2280 while (isdigit(*av)) { 2281 char *s; 2282 int a = strtol(av, &s, 0); 2283 2284 if (s == av) { /* no parameter */ 2285 if (*av != '}') 2286 errx(EX_DATAERR, "set not closed\n"); 2287 if (i != -1) 2288 errx(EX_DATAERR, "incomplete range %d-", i); 2289 break; 2290 } 2291 if (a < low || a > high) 2292 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2293 a, low, high); 2294 a -= low; 2295 if (i == -1) /* no previous in range */ 2296 i = a; 2297 else { /* check that range is valid */ 2298 if (i > a) 2299 errx(EX_DATAERR, "invalid range %d-%d", 2300 i+low, a+low); 2301 if (*s == '-') 2302 errx(EX_DATAERR, "double '-' in range"); 2303 } 2304 for (; i <= a; i++) 2305 map[i/32] |= 1<<(i & 31); 2306 i = -1; 2307 if (*s == '-') 2308 i = a; 2309 else if (*s == '}') 2310 break; 2311 av = s+1; 2312 } 2313 return; 2314 } 2315 av = p; 2316 if (av) /* then *av must be a ',' */ 2317 av++; 2318 2319 /* Check this entry */ 2320 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2321 /* 2322 * 'any' turns the entire list into a NOP. 2323 * 'not any' never matches, so it is removed from the 2324 * list unless it is the only item, in which case we 2325 * report an error. 2326 */ 2327 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2328 if (av == NULL && len == 0) /* only this entry */ 2329 errx(EX_DATAERR, "not any never matches"); 2330 } 2331 /* else do nothing and skip this entry */ 2332 return; 2333 } 2334 /* A single IP can be stored in an optimized format */ 2335 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2336 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2337 return; 2338 } 2339 len += 2; /* two words... */ 2340 d += 2; 2341 } /* end while */ 2342 cmd->o.len |= len+1; 2343 } 2344 2345 2346 /* 2347 * helper function to process a set of flags and set bits in the 2348 * appropriate masks. 2349 */ 2350 static void 2351 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2352 struct _s_x *flags, char *p) 2353 { 2354 uint8_t set=0, clear=0; 2355 2356 while (p && *p) { 2357 char *q; /* points to the separator */ 2358 int val; 2359 uint8_t *which; /* mask we are working on */ 2360 2361 if (*p == '!') { 2362 p++; 2363 which = &clear; 2364 } else 2365 which = &set; 2366 q = strchr(p, ','); 2367 if (q) 2368 *q++ = '\0'; 2369 val = match_token(flags, p); 2370 if (val <= 0) 2371 errx(EX_DATAERR, "invalid flag %s", p); 2372 *which |= (uint8_t)val; 2373 p = q; 2374 } 2375 cmd->opcode = opcode; 2376 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2377 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2378 } 2379 2380 2381 static void 2382 delete(int ac, char *av[]) 2383 { 2384 uint32_t rulenum; 2385 struct dn_pipe p; 2386 int i; 2387 int exitval = EX_OK; 2388 int do_set = 0; 2389 2390 memset(&p, 0, sizeof p); 2391 2392 av++; ac--; 2393 NEED1("missing rule specification"); 2394 if (ac > 0 && _substrcmp(*av, "set") == 0) { 2395 do_set = 1; /* delete set */ 2396 ac--; av++; 2397 } 2398 2399 /* Rule number */ 2400 while (ac && isdigit(**av)) { 2401 i = atoi(*av); av++; ac--; 2402 if (do_pipe) { 2403 if (do_pipe == 1) 2404 p.pipe_nr = i; 2405 else 2406 p.fs.fs_nr = i; 2407 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 2408 if (i) { 2409 exitval = 1; 2410 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2411 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 2412 } 2413 } else { 2414 rulenum = (i & 0xffff) | (do_set << 24); 2415 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 2416 if (i) { 2417 exitval = EX_UNAVAILABLE; 2418 warn("rule %u: setsockopt(IP_FW_DEL)", 2419 rulenum); 2420 } 2421 } 2422 } 2423 if (exitval != EX_OK) 2424 exit(exitval); 2425 } 2426 2427 2428 /* 2429 * fill the interface structure. We do not check the name as we can 2430 * create interfaces dynamically, so checking them at insert time 2431 * makes relatively little sense. 2432 * Interface names containing '*', '?', or '[' are assumed to be shell 2433 * patterns which match interfaces. 2434 */ 2435 static void 2436 fill_iface(ipfw_insn_if *cmd, char *arg) 2437 { 2438 cmd->name[0] = '\0'; 2439 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2440 2441 /* Parse the interface or address */ 2442 if (strcmp(arg, "any") == 0) 2443 cmd->o.len = 0; /* effectively ignore this command */ 2444 else if (!isdigit(*arg)) { 2445 strlcpy(cmd->name, arg, sizeof(cmd->name)); 2446 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 2447 } else if (!inet_aton(arg, &cmd->p.ip)) 2448 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2449 } 2450 2451 static void 2452 config_pipe(int ac, char **av) 2453 { 2454 struct dn_pipe p; 2455 int i; 2456 char *end; 2457 uint32_t a; 2458 void *par = NULL; 2459 2460 memset(&p, 0, sizeof p); 2461 2462 av++; ac--; 2463 /* Pipe number */ 2464 if (ac && isdigit(**av)) { 2465 i = atoi(*av); av++; ac--; 2466 if (do_pipe == 1) 2467 p.pipe_nr = i; 2468 else 2469 p.fs.fs_nr = i; 2470 } 2471 while (ac > 0) { 2472 double d; 2473 int tok = match_token(dummynet_params, *av); 2474 ac--; av++; 2475 2476 switch(tok) { 2477 case TOK_NOERROR: 2478 p.fs.flags_fs |= DN_NOERROR; 2479 break; 2480 2481 case TOK_PLR: 2482 NEED1("plr needs argument 0..1\n"); 2483 d = strtod(av[0], NULL); 2484 if (d > 1) 2485 d = 1; 2486 else if (d < 0) 2487 d = 0; 2488 p.fs.plr = (int)(d*0x7fffffff); 2489 ac--; av++; 2490 break; 2491 2492 case TOK_QUEUE: 2493 NEED1("queue needs queue size\n"); 2494 end = NULL; 2495 p.fs.qsize = strtoul(av[0], &end, 0); 2496 if (*end == 'K' || *end == 'k') { 2497 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2498 p.fs.qsize *= 1024; 2499 } else if (*end == 'B' || 2500 _substrcmp2(end, "by", "bytes") == 0) { 2501 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2502 } 2503 ac--; av++; 2504 break; 2505 2506 case TOK_BUCKETS: 2507 NEED1("buckets needs argument\n"); 2508 p.fs.rq_size = strtoul(av[0], NULL, 0); 2509 ac--; av++; 2510 break; 2511 2512 case TOK_MASK: 2513 NEED1("mask needs mask specifier\n"); 2514 /* 2515 * per-flow queue, mask is dst_ip, dst_port, 2516 * src_ip, src_port, proto measured in bits 2517 */ 2518 par = NULL; 2519 2520 p.fs.flow_mask.dst_ip = 0; 2521 p.fs.flow_mask.src_ip = 0; 2522 p.fs.flow_mask.dst_port = 0; 2523 p.fs.flow_mask.src_port = 0; 2524 p.fs.flow_mask.proto = 0; 2525 end = NULL; 2526 2527 while (ac >= 1) { 2528 uint32_t *p32 = NULL; 2529 uint16_t *p16 = NULL; 2530 2531 tok = match_token(dummynet_params, *av); 2532 ac--; av++; 2533 switch(tok) { 2534 case TOK_ALL: 2535 /* 2536 * special case, all bits significant 2537 */ 2538 p.fs.flow_mask.dst_ip = ~0; 2539 p.fs.flow_mask.src_ip = ~0; 2540 p.fs.flow_mask.dst_port = ~0; 2541 p.fs.flow_mask.src_port = ~0; 2542 p.fs.flow_mask.proto = ~0; 2543 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2544 goto end_mask; 2545 2546 case TOK_DSTIP: 2547 p32 = &p.fs.flow_mask.dst_ip; 2548 break; 2549 2550 case TOK_SRCIP: 2551 p32 = &p.fs.flow_mask.src_ip; 2552 break; 2553 2554 case TOK_DSTPORT: 2555 p16 = &p.fs.flow_mask.dst_port; 2556 break; 2557 2558 case TOK_SRCPORT: 2559 p16 = &p.fs.flow_mask.src_port; 2560 break; 2561 2562 case TOK_PROTO: 2563 break; 2564 2565 default: 2566 ac++; av--; /* backtrack */ 2567 goto end_mask; 2568 } 2569 if (ac < 1) 2570 errx(EX_USAGE, "mask: value missing"); 2571 if (*av[0] == '/') { 2572 a = strtoul(av[0]+1, &end, 0); 2573 a = (a == 32) ? ~0 : (1 << a) - 1; 2574 } else 2575 a = strtoul(av[0], &end, 0); 2576 if (p32 != NULL) 2577 *p32 = a; 2578 else if (p16 != NULL) { 2579 if (a > 0xFFFF) 2580 errx(EX_DATAERR, 2581 "mask: must be 16 bit"); 2582 *p16 = (uint16_t)a; 2583 } else { 2584 if (a > 0xFF) 2585 errx(EX_DATAERR, 2586 "mask: must be 8 bit"); 2587 p.fs.flow_mask.proto = (uint8_t)a; 2588 } 2589 if (a != 0) 2590 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2591 ac--; av++; 2592 } /* end while, config masks */ 2593 end_mask: 2594 break; 2595 2596 case TOK_RED: 2597 case TOK_GRED: 2598 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2599 p.fs.flags_fs |= DN_IS_RED; 2600 if (tok == TOK_GRED) 2601 p.fs.flags_fs |= DN_IS_GENTLE_RED; 2602 /* 2603 * the format for parameters is w_q/min_th/max_th/max_p 2604 */ 2605 if ((end = strsep(&av[0], "/"))) { 2606 double w_q = strtod(end, NULL); 2607 if (w_q > 1 || w_q <= 0) 2608 errx(EX_DATAERR, "0 < w_q <= 1"); 2609 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2610 } 2611 if ((end = strsep(&av[0], "/"))) { 2612 p.fs.min_th = strtoul(end, &end, 0); 2613 if (*end == 'K' || *end == 'k') 2614 p.fs.min_th *= 1024; 2615 } 2616 if ((end = strsep(&av[0], "/"))) { 2617 p.fs.max_th = strtoul(end, &end, 0); 2618 if (*end == 'K' || *end == 'k') 2619 p.fs.max_th *= 1024; 2620 } 2621 if ((end = strsep(&av[0], "/"))) { 2622 double max_p = strtod(end, NULL); 2623 if (max_p > 1 || max_p <= 0) 2624 errx(EX_DATAERR, "0 < max_p <= 1"); 2625 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2626 } 2627 ac--; av++; 2628 break; 2629 2630 case TOK_DROPTAIL: 2631 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2632 break; 2633 2634 case TOK_BW: 2635 NEED1("bw needs bandwidth or interface\n"); 2636 if (do_pipe != 1) 2637 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2638 /* 2639 * set clocking interface or bandwidth value 2640 */ 2641 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 2642 int l = sizeof(p.if_name)-1; 2643 /* interface name */ 2644 strncpy(p.if_name, av[0], l); 2645 p.if_name[l] = '\0'; 2646 p.bandwidth = 0; 2647 } else { 2648 p.if_name[0] = '\0'; 2649 p.bandwidth = strtoul(av[0], &end, 0); 2650 if (*end == 'K' || *end == 'k') { 2651 end++; 2652 p.bandwidth *= 1000; 2653 } else if (*end == 'M') { 2654 end++; 2655 p.bandwidth *= 1000000; 2656 } 2657 if (*end == 'B' || 2658 _substrcmp2(end, "by", "bytes") == 0) 2659 p.bandwidth *= 8; 2660 if (p.bandwidth < 0) 2661 errx(EX_DATAERR, "bandwidth too large"); 2662 } 2663 ac--; av++; 2664 break; 2665 2666 case TOK_DELAY: 2667 if (do_pipe != 1) 2668 errx(EX_DATAERR, "delay only valid for pipes"); 2669 NEED1("delay needs argument 0..10000ms\n"); 2670 p.delay = strtoul(av[0], NULL, 0); 2671 ac--; av++; 2672 break; 2673 2674 case TOK_WEIGHT: 2675 if (do_pipe == 1) 2676 errx(EX_DATAERR,"weight only valid for queues"); 2677 NEED1("weight needs argument 0..100\n"); 2678 p.fs.weight = strtoul(av[0], &end, 0); 2679 ac--; av++; 2680 break; 2681 2682 case TOK_PIPE: 2683 if (do_pipe == 1) 2684 errx(EX_DATAERR,"pipe only valid for queues"); 2685 NEED1("pipe needs pipe_number\n"); 2686 p.fs.parent_nr = strtoul(av[0], &end, 0); 2687 ac--; av++; 2688 break; 2689 2690 default: 2691 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 2692 } 2693 } 2694 if (do_pipe == 1) { 2695 if (p.pipe_nr == 0) 2696 errx(EX_DATAERR, "pipe_nr must be > 0"); 2697 if (p.delay > 10000) 2698 errx(EX_DATAERR, "delay must be < 10000"); 2699 } else { /* do_pipe == 2, queue */ 2700 if (p.fs.parent_nr == 0) 2701 errx(EX_DATAERR, "pipe must be > 0"); 2702 if (p.fs.weight >100) 2703 errx(EX_DATAERR, "weight must be <= 100"); 2704 } 2705 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2706 if (p.fs.qsize > 1024*1024) 2707 errx(EX_DATAERR, "queue size must be < 1MB"); 2708 } else { 2709 if (p.fs.qsize > 100) 2710 errx(EX_DATAERR, "2 <= queue size <= 100"); 2711 } 2712 if (p.fs.flags_fs & DN_IS_RED) { 2713 size_t len; 2714 int lookup_depth, avg_pkt_size; 2715 double s, idle, weight, w_q; 2716 struct clockinfo ck; 2717 int t; 2718 2719 if (p.fs.min_th >= p.fs.max_th) 2720 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2721 p.fs.min_th, p.fs.max_th); 2722 if (p.fs.max_th == 0) 2723 errx(EX_DATAERR, "max_th must be > 0"); 2724 2725 len = sizeof(int); 2726 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2727 &lookup_depth, &len, NULL, 0) == -1) 2728 2729 errx(1, "sysctlbyname(\"%s\")", 2730 "net.inet.ip.dummynet.red_lookup_depth"); 2731 if (lookup_depth == 0) 2732 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2733 " must be greater than zero"); 2734 2735 len = sizeof(int); 2736 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2737 &avg_pkt_size, &len, NULL, 0) == -1) 2738 2739 errx(1, "sysctlbyname(\"%s\")", 2740 "net.inet.ip.dummynet.red_avg_pkt_size"); 2741 if (avg_pkt_size == 0) 2742 errx(EX_DATAERR, 2743 "net.inet.ip.dummynet.red_avg_pkt_size must" 2744 " be greater than zero"); 2745 2746 len = sizeof(struct clockinfo); 2747 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 2748 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 2749 2750 /* 2751 * Ticks needed for sending a medium-sized packet. 2752 * Unfortunately, when we are configuring a WF2Q+ queue, we 2753 * do not have bandwidth information, because that is stored 2754 * in the parent pipe, and also we have multiple queues 2755 * competing for it. So we set s=0, which is not very 2756 * correct. But on the other hand, why do we want RED with 2757 * WF2Q+ ? 2758 */ 2759 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 2760 s = 0; 2761 else 2762 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 2763 2764 /* 2765 * max idle time (in ticks) before avg queue size becomes 0. 2766 * NOTA: (3/w_q) is approx the value x so that 2767 * (1-w_q)^x < 10^-3. 2768 */ 2769 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 2770 idle = s * 3. / w_q; 2771 p.fs.lookup_step = (int)idle / lookup_depth; 2772 if (!p.fs.lookup_step) 2773 p.fs.lookup_step = 1; 2774 weight = 1 - w_q; 2775 for (t = p.fs.lookup_step; t > 0; --t) 2776 weight *= weight; 2777 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2778 } 2779 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 2780 if (i) 2781 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2782 } 2783 2784 static void 2785 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 2786 { 2787 int i, l; 2788 2789 for (i=0; i<6; i++) 2790 addr[i] = mask[i] = 0; 2791 if (strcmp(p, "any") == 0) 2792 return; 2793 2794 for (i=0; *p && i<6;i++, p++) { 2795 addr[i] = strtol(p, &p, 16); 2796 if (*p != ':') /* we start with the mask */ 2797 break; 2798 } 2799 if (*p == '/') { /* mask len */ 2800 l = strtol(p+1, &p, 0); 2801 for (i=0; l>0; l -=8, i++) 2802 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2803 } else if (*p == '&') { /* mask */ 2804 for (i=0, p++; *p && i<6;i++, p++) { 2805 mask[i] = strtol(p, &p, 16); 2806 if (*p != ':') 2807 break; 2808 } 2809 } else if (*p == '\0') { 2810 for (i=0; i<6; i++) 2811 mask[i] = 0xff; 2812 } 2813 for (i=0; i<6; i++) 2814 addr[i] &= mask[i]; 2815 } 2816 2817 /* 2818 * helper function, updates the pointer to cmd with the length 2819 * of the current command, and also cleans up the first word of 2820 * the new command in case it has been clobbered before. 2821 */ 2822 static ipfw_insn * 2823 next_cmd(ipfw_insn *cmd) 2824 { 2825 cmd += F_LEN(cmd); 2826 bzero(cmd, sizeof(*cmd)); 2827 return cmd; 2828 } 2829 2830 /* 2831 * Takes arguments and copies them into a comment 2832 */ 2833 static void 2834 fill_comment(ipfw_insn *cmd, int ac, char **av) 2835 { 2836 int i, l; 2837 char *p = (char *)(cmd + 1); 2838 2839 cmd->opcode = O_NOP; 2840 cmd->len = (cmd->len & (F_NOT | F_OR)); 2841 2842 /* Compute length of comment string. */ 2843 for (i = 0, l = 0; i < ac; i++) 2844 l += strlen(av[i]) + 1; 2845 if (l == 0) 2846 return; 2847 if (l > 84) 2848 errx(EX_DATAERR, 2849 "comment too long (max 80 chars)"); 2850 l = 1 + (l+3)/4; 2851 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 2852 for (i = 0; i < ac; i++) { 2853 strcpy(p, av[i]); 2854 p += strlen(av[i]); 2855 *p++ = ' '; 2856 } 2857 *(--p) = '\0'; 2858 } 2859 2860 /* 2861 * A function to fill simple commands of size 1. 2862 * Existing flags are preserved. 2863 */ 2864 static void 2865 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 2866 { 2867 cmd->opcode = opcode; 2868 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2869 cmd->arg1 = arg; 2870 } 2871 2872 /* 2873 * Fetch and add the MAC address and type, with masks. This generates one or 2874 * two microinstructions, and returns the pointer to the last one. 2875 */ 2876 static ipfw_insn * 2877 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2878 { 2879 ipfw_insn_mac *mac; 2880 2881 if (ac < 2) 2882 errx(EX_DATAERR, "MAC dst src"); 2883 2884 cmd->opcode = O_MACADDR2; 2885 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2886 2887 mac = (ipfw_insn_mac *)cmd; 2888 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2889 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2890 return cmd; 2891 } 2892 2893 static ipfw_insn * 2894 add_mactype(ipfw_insn *cmd, int ac, char *av) 2895 { 2896 if (ac < 1) 2897 errx(EX_DATAERR, "missing MAC type"); 2898 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2899 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2900 cmd->opcode = O_MAC_TYPE; 2901 return cmd; 2902 } else 2903 return NULL; 2904 } 2905 2906 static ipfw_insn * 2907 add_proto(ipfw_insn *cmd, char *av) 2908 { 2909 struct protoent *pe; 2910 u_char proto = 0; 2911 2912 if (_substrcmp(av, "all") == 0) 2913 ; /* same as "ip" */ 2914 else if ((proto = atoi(av)) > 0) 2915 ; /* all done! */ 2916 else if ((pe = getprotobyname(av)) != NULL) 2917 proto = pe->p_proto; 2918 else 2919 return NULL; 2920 if (proto != IPPROTO_IP) 2921 fill_cmd(cmd, O_PROTO, 0, proto); 2922 return cmd; 2923 } 2924 2925 static ipfw_insn * 2926 add_srcip(ipfw_insn *cmd, char *av) 2927 { 2928 fill_ip((ipfw_insn_ip *)cmd, av); 2929 if (cmd->opcode == O_IP_DST_SET) /* set */ 2930 cmd->opcode = O_IP_SRC_SET; 2931 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 2932 cmd->opcode = O_IP_SRC_LOOKUP; 2933 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2934 cmd->opcode = O_IP_SRC_ME; 2935 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2936 cmd->opcode = O_IP_SRC; 2937 else /* addr/mask */ 2938 cmd->opcode = O_IP_SRC_MASK; 2939 return cmd; 2940 } 2941 2942 static ipfw_insn * 2943 add_dstip(ipfw_insn *cmd, char *av) 2944 { 2945 fill_ip((ipfw_insn_ip *)cmd, av); 2946 if (cmd->opcode == O_IP_DST_SET) /* set */ 2947 ; 2948 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 2949 ; 2950 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2951 cmd->opcode = O_IP_DST_ME; 2952 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2953 cmd->opcode = O_IP_DST; 2954 else /* addr/mask */ 2955 cmd->opcode = O_IP_DST_MASK; 2956 return cmd; 2957 } 2958 2959 static ipfw_insn * 2960 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2961 { 2962 if (_substrcmp(av, "any") == 0) { 2963 return NULL; 2964 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2965 /* XXX todo: check that we have a protocol with ports */ 2966 cmd->opcode = opcode; 2967 return cmd; 2968 } 2969 return NULL; 2970 } 2971 2972 /* 2973 * Parse arguments and assemble the microinstructions which make up a rule. 2974 * Rules are added into the 'rulebuf' and then copied in the correct order 2975 * into the actual rule. 2976 * 2977 * The syntax for a rule starts with the action, followed by 2978 * optional action parameters, and the various match patterns. 2979 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 2980 * (generated if the rule includes a keep-state option), then the 2981 * various match patterns, log/altq actions, and the actual action. 2982 * 2983 */ 2984 static void 2985 add(int ac, char *av[]) 2986 { 2987 /* 2988 * rules are added into the 'rulebuf' and then copied in 2989 * the correct order into the actual rule. 2990 * Some things that need to go out of order (prob, action etc.) 2991 * go into actbuf[]. 2992 */ 2993 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2994 2995 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 2996 ipfw_insn *first_cmd; /* first match pattern */ 2997 2998 struct ip_fw *rule; 2999 3000 /* 3001 * various flags used to record that we entered some fields. 3002 */ 3003 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3004 ipfw_insn *have_log = NULL, *have_altq = NULL; 3005 size_t len; 3006 3007 int i; 3008 3009 int open_par = 0; /* open parenthesis ( */ 3010 3011 /* proto is here because it is used to fetch ports */ 3012 u_char proto = IPPROTO_IP; /* default protocol */ 3013 3014 double match_prob = 1; /* match probability, default is always match */ 3015 3016 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3017 bzero(cmdbuf, sizeof(cmdbuf)); 3018 bzero(rulebuf, sizeof(rulebuf)); 3019 3020 rule = (struct ip_fw *)rulebuf; 3021 cmd = (ipfw_insn *)cmdbuf; 3022 action = (ipfw_insn *)actbuf; 3023 3024 av++; ac--; 3025 3026 /* [rule N] -- Rule number optional */ 3027 if (ac && isdigit(**av)) { 3028 rule->rulenum = atoi(*av); 3029 av++; 3030 ac--; 3031 } 3032 3033 /* [set N] -- set number (0..RESVD_SET), optional */ 3034 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3035 int set = strtoul(av[1], NULL, 10); 3036 if (set < 0 || set > RESVD_SET) 3037 errx(EX_DATAERR, "illegal set %s", av[1]); 3038 rule->set = set; 3039 av += 2; ac -= 2; 3040 } 3041 3042 /* [prob D] -- match probability, optional */ 3043 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3044 match_prob = strtod(av[1], NULL); 3045 3046 if (match_prob <= 0 || match_prob > 1) 3047 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3048 av += 2; ac -= 2; 3049 } 3050 3051 /* action -- mandatory */ 3052 NEED1("missing action"); 3053 i = match_token(rule_actions, *av); 3054 ac--; av++; 3055 action->len = 1; /* default */ 3056 switch(i) { 3057 case TOK_CHECKSTATE: 3058 have_state = action; 3059 action->opcode = O_CHECK_STATE; 3060 break; 3061 3062 case TOK_ACCEPT: 3063 action->opcode = O_ACCEPT; 3064 break; 3065 3066 case TOK_DENY: 3067 action->opcode = O_DENY; 3068 action->arg1 = 0; 3069 break; 3070 3071 case TOK_REJECT: 3072 action->opcode = O_REJECT; 3073 action->arg1 = ICMP_UNREACH_HOST; 3074 break; 3075 3076 case TOK_RESET: 3077 action->opcode = O_REJECT; 3078 action->arg1 = ICMP_REJECT_RST; 3079 break; 3080 3081 case TOK_UNREACH: 3082 action->opcode = O_REJECT; 3083 NEED1("missing reject code"); 3084 fill_reject_code(&action->arg1, *av); 3085 ac--; av++; 3086 break; 3087 3088 case TOK_COUNT: 3089 action->opcode = O_COUNT; 3090 break; 3091 3092 case TOK_QUEUE: 3093 case TOK_PIPE: 3094 action->len = F_INSN_SIZE(ipfw_insn_pipe); 3095 case TOK_SKIPTO: 3096 if (i == TOK_QUEUE) 3097 action->opcode = O_QUEUE; 3098 else if (i == TOK_PIPE) 3099 action->opcode = O_PIPE; 3100 else if (i == TOK_SKIPTO) 3101 action->opcode = O_SKIPTO; 3102 NEED1("missing skipto/pipe/queue number"); 3103 action->arg1 = strtoul(*av, NULL, 10); 3104 av++; ac--; 3105 break; 3106 3107 case TOK_DIVERT: 3108 case TOK_TEE: 3109 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 3110 NEED1("missing divert/tee port"); 3111 action->arg1 = strtoul(*av, NULL, 0); 3112 if (action->arg1 == 0) { 3113 struct servent *s; 3114 setservent(1); 3115 s = getservbyname(av[0], "divert"); 3116 if (s != NULL) 3117 action->arg1 = ntohs(s->s_port); 3118 else 3119 errx(EX_DATAERR, "illegal divert/tee port"); 3120 } 3121 ac--; av++; 3122 break; 3123 3124 case TOK_FORWARD: { 3125 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3126 char *s, *end; 3127 3128 NEED1("missing forward address[:port]"); 3129 3130 action->opcode = O_FORWARD_IP; 3131 action->len = F_INSN_SIZE(ipfw_insn_sa); 3132 3133 p->sa.sin_len = sizeof(struct sockaddr_in); 3134 p->sa.sin_family = AF_INET; 3135 p->sa.sin_port = 0; 3136 /* 3137 * locate the address-port separator (':' or ',') 3138 */ 3139 s = strchr(*av, ':'); 3140 if (s == NULL) 3141 s = strchr(*av, ','); 3142 if (s != NULL) { 3143 *(s++) = '\0'; 3144 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3145 if (s == end) 3146 errx(EX_DATAERR, 3147 "illegal forwarding port ``%s''", s); 3148 p->sa.sin_port = (u_short)i; 3149 } 3150 lookup_host(*av, &(p->sa.sin_addr)); 3151 } 3152 ac--; av++; 3153 break; 3154 3155 case TOK_COMMENT: 3156 /* pretend it is a 'count' rule followed by the comment */ 3157 action->opcode = O_COUNT; 3158 ac++; av--; /* go back... */ 3159 break; 3160 3161 default: 3162 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 3163 } 3164 action = next_cmd(action); 3165 3166 /* 3167 * [altq queuename] -- altq tag, optional 3168 * [log [logamount N]] -- log, optional 3169 * 3170 * If they exist, it go first in the cmdbuf, but then it is 3171 * skipped in the copy section to the end of the buffer. 3172 */ 3173 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 3174 ac--; av++; 3175 switch (i) { 3176 case TOK_LOG: 3177 { 3178 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 3179 int l; 3180 3181 if (have_log) 3182 errx(EX_DATAERR, 3183 "log cannot be specified more than once"); 3184 have_log = (ipfw_insn *)c; 3185 cmd->len = F_INSN_SIZE(ipfw_insn_log); 3186 cmd->opcode = O_LOG; 3187 if (ac && _substrcmp(*av, "logamount") == 0) { 3188 ac--; av++; 3189 NEED1("logamount requires argument"); 3190 l = atoi(*av); 3191 if (l < 0) 3192 errx(EX_DATAERR, 3193 "logamount must be positive"); 3194 c->max_log = l; 3195 ac--; av++; 3196 } else { 3197 len = sizeof(c->max_log); 3198 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 3199 &c->max_log, &len, NULL, 0) == -1) 3200 errx(1, "sysctlbyname(\"%s\")", 3201 "net.inet.ip.fw.verbose_limit"); 3202 } 3203 } 3204 break; 3205 3206 case TOK_ALTQ: 3207 { 3208 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 3209 3210 NEED1("missing altq queue name"); 3211 if (have_altq) 3212 errx(EX_DATAERR, 3213 "altq cannot be specified more than once"); 3214 have_altq = (ipfw_insn *)a; 3215 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 3216 cmd->opcode = O_ALTQ; 3217 fill_altq_qid(&a->qid, *av); 3218 ac--; av++; 3219 } 3220 break; 3221 3222 default: 3223 abort(); 3224 } 3225 cmd = next_cmd(cmd); 3226 } 3227 3228 if (have_state) /* must be a check-state, we are done */ 3229 goto done; 3230 3231 #define OR_START(target) \ 3232 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 3233 if (open_par) \ 3234 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 3235 prev = NULL; \ 3236 open_par = 1; \ 3237 if ( (av[0])[1] == '\0') { \ 3238 ac--; av++; \ 3239 } else \ 3240 (*av)++; \ 3241 } \ 3242 target: \ 3243 3244 3245 #define CLOSE_PAR \ 3246 if (open_par) { \ 3247 if (ac && ( \ 3248 strcmp(*av, ")") == 0 || \ 3249 strcmp(*av, "}") == 0)) { \ 3250 prev = NULL; \ 3251 open_par = 0; \ 3252 ac--; av++; \ 3253 } else \ 3254 errx(EX_USAGE, "missing \")\"\n"); \ 3255 } 3256 3257 #define NOT_BLOCK \ 3258 if (ac && _substrcmp(*av, "not") == 0) { \ 3259 if (cmd->len & F_NOT) \ 3260 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 3261 cmd->len |= F_NOT; \ 3262 ac--; av++; \ 3263 } 3264 3265 #define OR_BLOCK(target) \ 3266 if (ac && _substrcmp(*av, "or") == 0) { \ 3267 if (prev == NULL || open_par == 0) \ 3268 errx(EX_DATAERR, "invalid OR block"); \ 3269 prev->len |= F_OR; \ 3270 ac--; av++; \ 3271 goto target; \ 3272 } \ 3273 CLOSE_PAR; 3274 3275 first_cmd = cmd; 3276 3277 #if 0 3278 /* 3279 * MAC addresses, optional. 3280 * If we have this, we skip the part "proto from src to dst" 3281 * and jump straight to the option parsing. 3282 */ 3283 NOT_BLOCK; 3284 NEED1("missing protocol"); 3285 if (_substrcmp(*av, "MAC") == 0 || 3286 _substrcmp(*av, "mac") == 0) { 3287 ac--; av++; /* the "MAC" keyword */ 3288 add_mac(cmd, ac, av); /* exits in case of errors */ 3289 cmd = next_cmd(cmd); 3290 ac -= 2; av += 2; /* dst-mac and src-mac */ 3291 NOT_BLOCK; 3292 NEED1("missing mac type"); 3293 if (add_mactype(cmd, ac, av[0])) 3294 cmd = next_cmd(cmd); 3295 ac--; av++; /* any or mac-type */ 3296 goto read_options; 3297 } 3298 #endif 3299 3300 /* 3301 * protocol, mandatory 3302 */ 3303 OR_START(get_proto); 3304 NOT_BLOCK; 3305 NEED1("missing protocol"); 3306 if (add_proto(cmd, *av)) { 3307 av++; ac--; 3308 if (F_LEN(cmd) == 0) /* plain IP */ 3309 proto = 0; 3310 else { 3311 proto = cmd->arg1; 3312 prev = cmd; 3313 cmd = next_cmd(cmd); 3314 } 3315 } else if (first_cmd != cmd) { 3316 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3317 } else 3318 goto read_options; 3319 OR_BLOCK(get_proto); 3320 3321 /* 3322 * "from", mandatory 3323 */ 3324 if (!ac || _substrcmp(*av, "from") != 0) 3325 errx(EX_USAGE, "missing ``from''"); 3326 ac--; av++; 3327 3328 /* 3329 * source IP, mandatory 3330 */ 3331 OR_START(source_ip); 3332 NOT_BLOCK; /* optional "not" */ 3333 NEED1("missing source address"); 3334 if (add_srcip(cmd, *av)) { 3335 ac--; av++; 3336 if (F_LEN(cmd) != 0) { /* ! any */ 3337 prev = cmd; 3338 cmd = next_cmd(cmd); 3339 } 3340 } 3341 OR_BLOCK(source_ip); 3342 3343 /* 3344 * source ports, optional 3345 */ 3346 NOT_BLOCK; /* optional "not" */ 3347 if (ac) { 3348 if (_substrcmp(*av, "any") == 0 || 3349 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3350 ac--; av++; 3351 if (F_LEN(cmd) != 0) 3352 cmd = next_cmd(cmd); 3353 } 3354 } 3355 3356 /* 3357 * "to", mandatory 3358 */ 3359 if (!ac || _substrcmp(*av, "to") != 0) 3360 errx(EX_USAGE, "missing ``to''"); 3361 av++; ac--; 3362 3363 /* 3364 * destination, mandatory 3365 */ 3366 OR_START(dest_ip); 3367 NOT_BLOCK; /* optional "not" */ 3368 NEED1("missing dst address"); 3369 if (add_dstip(cmd, *av)) { 3370 ac--; av++; 3371 if (F_LEN(cmd) != 0) { /* ! any */ 3372 prev = cmd; 3373 cmd = next_cmd(cmd); 3374 } 3375 } 3376 OR_BLOCK(dest_ip); 3377 3378 /* 3379 * dest. ports, optional 3380 */ 3381 NOT_BLOCK; /* optional "not" */ 3382 if (ac) { 3383 if (_substrcmp(*av, "any") == 0 || 3384 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3385 ac--; av++; 3386 if (F_LEN(cmd) != 0) 3387 cmd = next_cmd(cmd); 3388 } 3389 } 3390 3391 read_options: 3392 if (ac && first_cmd == cmd) { 3393 /* 3394 * nothing specified so far, store in the rule to ease 3395 * printout later. 3396 */ 3397 rule->_pad = 1; 3398 } 3399 prev = NULL; 3400 while (ac) { 3401 char *s; 3402 ipfw_insn_u32 *cmd32; /* alias for cmd */ 3403 3404 s = *av; 3405 cmd32 = (ipfw_insn_u32 *)cmd; 3406 3407 if (*s == '!') { /* alternate syntax for NOT */ 3408 if (cmd->len & F_NOT) 3409 errx(EX_USAGE, "double \"not\" not allowed\n"); 3410 cmd->len = F_NOT; 3411 s++; 3412 } 3413 i = match_token(rule_options, s); 3414 ac--; av++; 3415 switch(i) { 3416 case TOK_NOT: 3417 if (cmd->len & F_NOT) 3418 errx(EX_USAGE, "double \"not\" not allowed\n"); 3419 cmd->len = F_NOT; 3420 break; 3421 3422 case TOK_OR: 3423 if (open_par == 0 || prev == NULL) 3424 errx(EX_USAGE, "invalid \"or\" block\n"); 3425 prev->len |= F_OR; 3426 break; 3427 3428 case TOK_STARTBRACE: 3429 if (open_par) 3430 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 3431 open_par = 1; 3432 break; 3433 3434 case TOK_ENDBRACE: 3435 if (!open_par) 3436 errx(EX_USAGE, "+missing \")\"\n"); 3437 open_par = 0; 3438 prev = NULL; 3439 break; 3440 3441 case TOK_IN: 3442 fill_cmd(cmd, O_IN, 0, 0); 3443 break; 3444 3445 case TOK_OUT: 3446 cmd->len ^= F_NOT; /* toggle F_NOT */ 3447 fill_cmd(cmd, O_IN, 0, 0); 3448 break; 3449 3450 case TOK_DIVERTED: 3451 fill_cmd(cmd, O_DIVERTED, 0, 3); 3452 break; 3453 3454 case TOK_DIVERTEDLOOPBACK: 3455 fill_cmd(cmd, O_DIVERTED, 0, 1); 3456 break; 3457 3458 case TOK_DIVERTEDOUTPUT: 3459 fill_cmd(cmd, O_DIVERTED, 0, 2); 3460 break; 3461 3462 case TOK_FRAG: 3463 fill_cmd(cmd, O_FRAG, 0, 0); 3464 break; 3465 3466 case TOK_LAYER2: 3467 fill_cmd(cmd, O_LAYER2, 0, 0); 3468 break; 3469 3470 case TOK_XMIT: 3471 case TOK_RECV: 3472 case TOK_VIA: 3473 NEED1("recv, xmit, via require interface name" 3474 " or address"); 3475 fill_iface((ipfw_insn_if *)cmd, av[0]); 3476 ac--; av++; 3477 if (F_LEN(cmd) == 0) /* not a valid address */ 3478 break; 3479 if (i == TOK_XMIT) 3480 cmd->opcode = O_XMIT; 3481 else if (i == TOK_RECV) 3482 cmd->opcode = O_RECV; 3483 else if (i == TOK_VIA) 3484 cmd->opcode = O_VIA; 3485 break; 3486 3487 case TOK_ICMPTYPES: 3488 NEED1("icmptypes requires list of types"); 3489 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 3490 av++; ac--; 3491 break; 3492 3493 case TOK_IPTTL: 3494 NEED1("ipttl requires TTL"); 3495 if (strpbrk(*av, "-,")) { 3496 if (!add_ports(cmd, *av, 0, O_IPTTL)) 3497 errx(EX_DATAERR, "invalid ipttl %s", *av); 3498 } else 3499 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3500 ac--; av++; 3501 break; 3502 3503 case TOK_IPID: 3504 NEED1("ipid requires id"); 3505 if (strpbrk(*av, "-,")) { 3506 if (!add_ports(cmd, *av, 0, O_IPID)) 3507 errx(EX_DATAERR, "invalid ipid %s", *av); 3508 } else 3509 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3510 ac--; av++; 3511 break; 3512 3513 case TOK_IPLEN: 3514 NEED1("iplen requires length"); 3515 if (strpbrk(*av, "-,")) { 3516 if (!add_ports(cmd, *av, 0, O_IPLEN)) 3517 errx(EX_DATAERR, "invalid ip len %s", *av); 3518 } else 3519 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3520 ac--; av++; 3521 break; 3522 3523 case TOK_IPVER: 3524 NEED1("ipver requires version"); 3525 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3526 ac--; av++; 3527 break; 3528 3529 case TOK_IPPRECEDENCE: 3530 NEED1("ipprecedence requires value"); 3531 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3532 (strtoul(*av, NULL, 0) & 7) << 5); 3533 ac--; av++; 3534 break; 3535 3536 case TOK_IPOPTS: 3537 NEED1("missing argument for ipoptions"); 3538 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3539 ac--; av++; 3540 break; 3541 3542 case TOK_IPTOS: 3543 NEED1("missing argument for iptos"); 3544 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3545 ac--; av++; 3546 break; 3547 3548 case TOK_UID: 3549 NEED1("uid requires argument"); 3550 { 3551 char *end; 3552 uid_t uid; 3553 struct passwd *pwd; 3554 3555 cmd->opcode = O_UID; 3556 uid = strtoul(*av, &end, 0); 3557 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3558 if (pwd == NULL) 3559 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3560 cmd32->d[0] = pwd->pw_uid; 3561 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3562 ac--; av++; 3563 } 3564 break; 3565 3566 case TOK_GID: 3567 NEED1("gid requires argument"); 3568 { 3569 char *end; 3570 gid_t gid; 3571 struct group *grp; 3572 3573 cmd->opcode = O_GID; 3574 gid = strtoul(*av, &end, 0); 3575 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3576 if (grp == NULL) 3577 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3578 cmd32->d[0] = grp->gr_gid; 3579 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3580 ac--; av++; 3581 } 3582 break; 3583 3584 case TOK_JAIL: 3585 NEED1("jail requires argument"); 3586 { 3587 char *end; 3588 int jid; 3589 3590 cmd->opcode = O_JAIL; 3591 jid = (int)strtol(*av, &end, 0); 3592 if (jid < 0 || *end != '\0') 3593 errx(EX_DATAERR, "jail requires prison ID"); 3594 cmd32->d[0] = (uint32_t)jid; 3595 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3596 ac--; av++; 3597 } 3598 break; 3599 3600 case TOK_ESTAB: 3601 fill_cmd(cmd, O_ESTAB, 0, 0); 3602 break; 3603 3604 case TOK_SETUP: 3605 fill_cmd(cmd, O_TCPFLAGS, 0, 3606 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3607 break; 3608 3609 case TOK_TCPDATALEN: 3610 NEED1("tcpdatalen requires length"); 3611 if (strpbrk(*av, "-,")) { 3612 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 3613 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 3614 } else 3615 fill_cmd(cmd, O_TCPDATALEN, 0, 3616 strtoul(*av, NULL, 0)); 3617 ac--; av++; 3618 break; 3619 3620 case TOK_TCPOPTS: 3621 NEED1("missing argument for tcpoptions"); 3622 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3623 ac--; av++; 3624 break; 3625 3626 case TOK_TCPSEQ: 3627 case TOK_TCPACK: 3628 NEED1("tcpseq/tcpack requires argument"); 3629 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3630 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3631 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3632 ac--; av++; 3633 break; 3634 3635 case TOK_TCPWIN: 3636 NEED1("tcpwin requires length"); 3637 fill_cmd(cmd, O_TCPWIN, 0, 3638 htons(strtoul(*av, NULL, 0))); 3639 ac--; av++; 3640 break; 3641 3642 case TOK_TCPFLAGS: 3643 NEED1("missing argument for tcpflags"); 3644 cmd->opcode = O_TCPFLAGS; 3645 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3646 ac--; av++; 3647 break; 3648 3649 case TOK_KEEPSTATE: 3650 if (open_par) 3651 errx(EX_USAGE, "keep-state cannot be part " 3652 "of an or block"); 3653 if (have_state) 3654 errx(EX_USAGE, "only one of keep-state " 3655 "and limit is allowed"); 3656 have_state = cmd; 3657 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3658 break; 3659 3660 case TOK_LIMIT: 3661 if (open_par) 3662 errx(EX_USAGE, "limit cannot be part " 3663 "of an or block"); 3664 if (have_state) 3665 errx(EX_USAGE, "only one of keep-state " 3666 "and limit is allowed"); 3667 NEED1("limit needs mask and # of connections"); 3668 have_state = cmd; 3669 { 3670 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3671 3672 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3673 cmd->opcode = O_LIMIT; 3674 c->limit_mask = 0; 3675 c->conn_limit = 0; 3676 for (; ac >1 ;) { 3677 int val; 3678 3679 val = match_token(limit_masks, *av); 3680 if (val <= 0) 3681 break; 3682 c->limit_mask |= val; 3683 ac--; av++; 3684 } 3685 c->conn_limit = atoi(*av); 3686 if (c->conn_limit == 0) 3687 errx(EX_USAGE, "limit: limit must be >0"); 3688 if (c->limit_mask == 0) 3689 errx(EX_USAGE, "missing limit mask"); 3690 ac--; av++; 3691 } 3692 break; 3693 3694 case TOK_PROTO: 3695 NEED1("missing protocol"); 3696 if (add_proto(cmd, *av)) { 3697 proto = cmd->arg1; 3698 ac--; av++; 3699 } else 3700 errx(EX_DATAERR, "invalid protocol ``%s''", 3701 *av); 3702 break; 3703 3704 case TOK_SRCIP: 3705 NEED1("missing source IP"); 3706 if (add_srcip(cmd, *av)) { 3707 ac--; av++; 3708 } 3709 break; 3710 3711 case TOK_DSTIP: 3712 NEED1("missing destination IP"); 3713 if (add_dstip(cmd, *av)) { 3714 ac--; av++; 3715 } 3716 break; 3717 3718 case TOK_SRCPORT: 3719 NEED1("missing source port"); 3720 if (_substrcmp(*av, "any") == 0 || 3721 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3722 ac--; av++; 3723 } else 3724 errx(EX_DATAERR, "invalid source port %s", *av); 3725 break; 3726 3727 case TOK_DSTPORT: 3728 NEED1("missing destination port"); 3729 if (_substrcmp(*av, "any") == 0 || 3730 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3731 ac--; av++; 3732 } else 3733 errx(EX_DATAERR, "invalid destination port %s", 3734 *av); 3735 break; 3736 3737 case TOK_MAC: 3738 if (add_mac(cmd, ac, av)) { 3739 ac -= 2; av += 2; 3740 } 3741 break; 3742 3743 case TOK_MACTYPE: 3744 NEED1("missing mac type"); 3745 if (!add_mactype(cmd, ac, *av)) 3746 errx(EX_DATAERR, "invalid mac type %s", *av); 3747 ac--; av++; 3748 break; 3749 3750 case TOK_VERREVPATH: 3751 fill_cmd(cmd, O_VERREVPATH, 0, 0); 3752 break; 3753 3754 case TOK_VERSRCREACH: 3755 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 3756 break; 3757 3758 case TOK_ANTISPOOF: 3759 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 3760 break; 3761 3762 case TOK_IPSEC: 3763 fill_cmd(cmd, O_IPSEC, 0, 0); 3764 break; 3765 3766 case TOK_COMMENT: 3767 fill_comment(cmd, ac, av); 3768 av += ac; 3769 ac = 0; 3770 break; 3771 3772 default: 3773 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3774 } 3775 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3776 prev = cmd; 3777 cmd = next_cmd(cmd); 3778 } 3779 } 3780 3781 done: 3782 /* 3783 * Now copy stuff into the rule. 3784 * If we have a keep-state option, the first instruction 3785 * must be a PROBE_STATE (which is generated here). 3786 * If we have a LOG option, it was stored as the first command, 3787 * and now must be moved to the top of the action part. 3788 */ 3789 dst = (ipfw_insn *)rule->cmd; 3790 3791 /* 3792 * First thing to write into the command stream is the match probability. 3793 */ 3794 if (match_prob != 1) { /* 1 means always match */ 3795 dst->opcode = O_PROB; 3796 dst->len = 2; 3797 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3798 dst += dst->len; 3799 } 3800 3801 /* 3802 * generate O_PROBE_STATE if necessary 3803 */ 3804 if (have_state && have_state->opcode != O_CHECK_STATE) { 3805 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3806 dst = next_cmd(dst); 3807 } 3808 /* 3809 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ 3810 */ 3811 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3812 i = F_LEN(src); 3813 3814 switch (src->opcode) { 3815 case O_LOG: 3816 case O_KEEP_STATE: 3817 case O_LIMIT: 3818 case O_ALTQ: 3819 break; 3820 default: 3821 bcopy(src, dst, i * sizeof(uint32_t)); 3822 dst += i; 3823 } 3824 } 3825 3826 /* 3827 * put back the have_state command as last opcode 3828 */ 3829 if (have_state && have_state->opcode != O_CHECK_STATE) { 3830 i = F_LEN(have_state); 3831 bcopy(have_state, dst, i * sizeof(uint32_t)); 3832 dst += i; 3833 } 3834 /* 3835 * start action section 3836 */ 3837 rule->act_ofs = dst - rule->cmd; 3838 3839 /* 3840 * put back O_LOG, O_ALTQ if necessary 3841 */ 3842 if (have_log) { 3843 i = F_LEN(have_log); 3844 bcopy(have_log, dst, i * sizeof(uint32_t)); 3845 dst += i; 3846 } 3847 if (have_altq) { 3848 i = F_LEN(have_altq); 3849 bcopy(have_altq, dst, i * sizeof(uint32_t)); 3850 dst += i; 3851 } 3852 /* 3853 * copy all other actions 3854 */ 3855 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3856 i = F_LEN(src); 3857 bcopy(src, dst, i * sizeof(uint32_t)); 3858 dst += i; 3859 } 3860 3861 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 3862 i = (char *)dst - (char *)rule; 3863 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 3864 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3865 if (!do_quiet) 3866 show_ipfw(rule, 0, 0); 3867 } 3868 3869 static void 3870 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 3871 { 3872 int rulenum; 3873 int failed = EX_OK; 3874 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 3875 3876 av++; ac--; 3877 3878 if (!ac) { 3879 /* clear all entries */ 3880 if (do_cmd(optname, NULL, 0) < 0) 3881 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 3882 if (!do_quiet) 3883 printf("%s.\n", optname == IP_FW_ZERO ? 3884 "Accounting cleared":"Logging counts reset"); 3885 3886 return; 3887 } 3888 3889 while (ac) { 3890 /* Rule number */ 3891 if (isdigit(**av)) { 3892 rulenum = atoi(*av); 3893 av++; 3894 ac--; 3895 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 3896 warn("rule %u: setsockopt(IP_FW_%s)", 3897 rulenum, name); 3898 failed = EX_UNAVAILABLE; 3899 } else if (!do_quiet) 3900 printf("Entry %d %s.\n", rulenum, 3901 optname == IP_FW_ZERO ? 3902 "cleared" : "logging count reset"); 3903 } else { 3904 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3905 } 3906 } 3907 if (failed != EX_OK) 3908 exit(failed); 3909 } 3910 3911 static void 3912 flush(int force) 3913 { 3914 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3915 3916 if (!force && !do_quiet) { /* need to ask user */ 3917 int c; 3918 3919 printf("Are you sure? [yn] "); 3920 fflush(stdout); 3921 do { 3922 c = toupper(getc(stdin)); 3923 while (c != '\n' && getc(stdin) != '\n') 3924 if (feof(stdin)) 3925 return; /* and do not flush */ 3926 } while (c != 'Y' && c != 'N'); 3927 printf("\n"); 3928 if (c == 'N') /* user said no */ 3929 return; 3930 } 3931 if (do_cmd(cmd, NULL, 0) < 0) 3932 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3933 do_pipe ? "DUMMYNET" : "FW"); 3934 if (!do_quiet) 3935 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3936 } 3937 3938 /* 3939 * Free a the (locally allocated) copy of command line arguments. 3940 */ 3941 static void 3942 free_args(int ac, char **av) 3943 { 3944 int i; 3945 3946 for (i=0; i < ac; i++) 3947 free(av[i]); 3948 free(av); 3949 } 3950 3951 /* 3952 * This one handles all table-related commands 3953 * ipfw table N add addr[/masklen] [value] 3954 * ipfw table N delete addr[/masklen] 3955 * ipfw table N flush 3956 * ipfw table N list 3957 */ 3958 static void 3959 table_handler(int ac, char *av[]) 3960 { 3961 ipfw_table_entry ent; 3962 ipfw_table *tbl; 3963 int do_add; 3964 char *p; 3965 socklen_t l; 3966 uint32_t a; 3967 3968 ac--; av++; 3969 if (ac && isdigit(**av)) { 3970 ent.tbl = atoi(*av); 3971 ac--; av++; 3972 } else 3973 errx(EX_USAGE, "table number required"); 3974 NEED1("table needs command"); 3975 if (_substrcmp(*av, "add") == 0 || 3976 _substrcmp(*av, "delete") == 0) { 3977 do_add = **av == 'a'; 3978 ac--; av++; 3979 if (!ac) 3980 errx(EX_USAGE, "IP address required"); 3981 p = strchr(*av, '/'); 3982 if (p) { 3983 *p++ = '\0'; 3984 ent.masklen = atoi(p); 3985 if (ent.masklen > 32) 3986 errx(EX_DATAERR, "bad width ``%s''", p); 3987 } else 3988 ent.masklen = 32; 3989 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 3990 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 3991 ac--; av++; 3992 if (do_add && ac) 3993 ent.value = strtoul(*av, NULL, 0); 3994 else 3995 ent.value = 0; 3996 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 3997 &ent, sizeof(ent)) < 0) 3998 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 3999 do_add ? "ADD" : "DEL"); 4000 } else if (_substrcmp(*av, "flush") == 0) { 4001 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4002 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4003 } else if (_substrcmp(*av, "list") == 0) { 4004 a = ent.tbl; 4005 l = sizeof(a); 4006 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4007 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4008 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4009 tbl = malloc(l); 4010 if (tbl == NULL) 4011 err(EX_OSERR, "malloc"); 4012 tbl->tbl = ent.tbl; 4013 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 4014 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 4015 for (a = 0; a < tbl->cnt; a++) { 4016 printf("%s/%u %u\n", 4017 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 4018 tbl->ent[a].masklen, tbl->ent[a].value); 4019 } 4020 } else 4021 errx(EX_USAGE, "invalid table command %s", *av); 4022 } 4023 4024 /* 4025 * Called with the arguments (excluding program name). 4026 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 4027 */ 4028 static int 4029 ipfw_main(int oldac, char **oldav) 4030 { 4031 int ch, ac, save_ac; 4032 char **av, **save_av; 4033 int do_acct = 0; /* Show packet/byte count */ 4034 4035 #define WHITESP " \t\f\v\n\r" 4036 if (oldac == 0) 4037 return 1; 4038 else if (oldac == 1) { 4039 /* 4040 * If we are called with a single string, try to split it into 4041 * arguments for subsequent parsing. 4042 * But first, remove spaces after a ',', by copying the string 4043 * in-place. 4044 */ 4045 char *arg = oldav[0]; /* The string... */ 4046 int l = strlen(arg); 4047 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 4048 int i, j; 4049 for (i = j = 0; i < l; i++) { 4050 if (arg[i] == '#') /* comment marker */ 4051 break; 4052 if (copy) { 4053 arg[j++] = arg[i]; 4054 copy = !index("," WHITESP, arg[i]); 4055 } else { 4056 copy = !index(WHITESP, arg[i]); 4057 if (copy) 4058 arg[j++] = arg[i]; 4059 } 4060 } 4061 if (!copy && j > 0) /* last char was a 'blank', remove it */ 4062 j--; 4063 l = j; /* the new argument length */ 4064 arg[j++] = '\0'; 4065 if (l == 0) /* empty string! */ 4066 return 1; 4067 4068 /* 4069 * First, count number of arguments. Because of the previous 4070 * processing, this is just the number of blanks plus 1. 4071 */ 4072 for (i = 0, ac = 1; i < l; i++) 4073 if (index(WHITESP, arg[i]) != NULL) 4074 ac++; 4075 4076 av = calloc(ac, sizeof(char *)); 4077 4078 /* 4079 * Second, copy arguments from cmd[] to av[]. For each one, 4080 * j is the initial character, i is the one past the end. 4081 */ 4082 for (ac = 0, i = j = 0; i < l; i++) 4083 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 4084 if (i == l-1) 4085 i++; 4086 av[ac] = calloc(i-j+1, 1); 4087 bcopy(arg+j, av[ac], i-j); 4088 ac++; 4089 j = i + 1; 4090 } 4091 } else { 4092 /* 4093 * If an argument ends with ',' join with the next one. 4094 */ 4095 int first, i, l; 4096 4097 av = calloc(oldac, sizeof(char *)); 4098 for (first = i = ac = 0, l = 0; i < oldac; i++) { 4099 char *arg = oldav[i]; 4100 int k = strlen(arg); 4101 4102 l += k; 4103 if (arg[k-1] != ',' || i == oldac-1) { 4104 /* Time to copy. */ 4105 av[ac] = calloc(l+1, 1); 4106 for (l=0; first <= i; first++) { 4107 strcat(av[ac]+l, oldav[first]); 4108 l += strlen(oldav[first]); 4109 } 4110 ac++; 4111 l = 0; 4112 first = i+1; 4113 } 4114 } 4115 } 4116 4117 /* Set the force flag for non-interactive processes */ 4118 if (!do_force) 4119 do_force = !isatty(STDIN_FILENO); 4120 4121 /* Save arguments for final freeing of memory. */ 4122 save_ac = ac; 4123 save_av = av; 4124 4125 optind = optreset = 0; 4126 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 4127 switch (ch) { 4128 case 'a': 4129 do_acct = 1; 4130 break; 4131 4132 case 'b': 4133 comment_only = 1; 4134 do_compact = 1; 4135 break; 4136 4137 case 'c': 4138 do_compact = 1; 4139 break; 4140 4141 case 'd': 4142 do_dynamic = 1; 4143 break; 4144 4145 case 'e': 4146 do_expired = 1; 4147 break; 4148 4149 case 'f': 4150 do_force = 1; 4151 break; 4152 4153 case 'h': /* help */ 4154 free_args(save_ac, save_av); 4155 help(); 4156 break; /* NOTREACHED */ 4157 4158 case 'n': 4159 test_only = 1; 4160 break; 4161 4162 case 'N': 4163 do_resolv = 1; 4164 break; 4165 4166 case 'q': 4167 do_quiet = 1; 4168 break; 4169 4170 case 's': /* sort */ 4171 do_sort = atoi(optarg); 4172 break; 4173 4174 case 'S': 4175 show_sets = 1; 4176 break; 4177 4178 case 't': 4179 do_time = 1; 4180 break; 4181 4182 case 'T': 4183 do_time = 2; /* numeric timestamp */ 4184 break; 4185 4186 case 'v': /* verbose */ 4187 verbose = 1; 4188 break; 4189 4190 default: 4191 free_args(save_ac, save_av); 4192 return 1; 4193 } 4194 4195 ac -= optind; 4196 av += optind; 4197 NEED1("bad arguments, for usage summary ``ipfw''"); 4198 4199 /* 4200 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 4201 * e.g. "100 add allow ..." instead of "add 100 allow ...". 4202 * In case, swap first and second argument to get the normal form. 4203 */ 4204 if (ac > 1 && isdigit(*av[0])) { 4205 char *p = av[0]; 4206 4207 av[0] = av[1]; 4208 av[1] = p; 4209 } 4210 4211 /* 4212 * optional: pipe or queue 4213 */ 4214 do_pipe = 0; 4215 if (_substrcmp(*av, "pipe") == 0) 4216 do_pipe = 1; 4217 else if (_substrcmp(*av, "queue") == 0) 4218 do_pipe = 2; 4219 if (do_pipe) { 4220 ac--; 4221 av++; 4222 } 4223 NEED1("missing command"); 4224 4225 /* 4226 * For pipes and queues we normally say 'pipe NN config' 4227 * but the code is easier to parse as 'pipe config NN' 4228 * so we swap the two arguments. 4229 */ 4230 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 4231 char *p = av[0]; 4232 4233 av[0] = av[1]; 4234 av[1] = p; 4235 } 4236 4237 if (_substrcmp(*av, "add") == 0) 4238 add(ac, av); 4239 else if (do_pipe && _substrcmp(*av, "config") == 0) 4240 config_pipe(ac, av); 4241 else if (_substrcmp(*av, "delete") == 0) 4242 delete(ac, av); 4243 else if (_substrcmp(*av, "flush") == 0) 4244 flush(do_force); 4245 else if (_substrcmp(*av, "zero") == 0) 4246 zero(ac, av, IP_FW_ZERO); 4247 else if (_substrcmp(*av, "resetlog") == 0) 4248 zero(ac, av, IP_FW_RESETLOG); 4249 else if (_substrcmp(*av, "print") == 0 || 4250 _substrcmp(*av, "list") == 0) 4251 list(ac, av, do_acct); 4252 else if (_substrcmp(*av, "set") == 0) 4253 sets_handler(ac, av); 4254 else if (_substrcmp(*av, "table") == 0) 4255 table_handler(ac, av); 4256 else if (_substrcmp(*av, "enable") == 0) 4257 sysctl_handler(ac, av, 1); 4258 else if (_substrcmp(*av, "disable") == 0) 4259 sysctl_handler(ac, av, 0); 4260 else if (_substrcmp(*av, "show") == 0) 4261 list(ac, av, 1 /* show counters */); 4262 else 4263 errx(EX_USAGE, "bad command `%s'", *av); 4264 4265 /* Free memory allocated in the argument parsing. */ 4266 free_args(save_ac, save_av); 4267 return 0; 4268 } 4269 4270 4271 static void 4272 ipfw_readfile(int ac, char *av[]) 4273 { 4274 #define MAX_ARGS 32 4275 char buf[BUFSIZ]; 4276 char *cmd = NULL, *filename = av[ac-1]; 4277 int c, lineno=0; 4278 FILE *f = NULL; 4279 pid_t preproc = 0; 4280 4281 filename = av[ac-1]; 4282 4283 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 4284 switch(c) { 4285 case 'c': 4286 do_compact = 1; 4287 break; 4288 4289 case 'f': 4290 do_force = 1; 4291 break; 4292 4293 case 'N': 4294 do_resolv = 1; 4295 break; 4296 4297 case 'n': 4298 test_only = 1; 4299 break; 4300 4301 case 'p': 4302 cmd = optarg; 4303 /* 4304 * Skip previous args and delete last one, so we 4305 * pass all but the last argument to the preprocessor 4306 * via av[optind-1] 4307 */ 4308 av += optind - 1; 4309 ac -= optind - 1; 4310 av[ac-1] = NULL; 4311 fprintf(stderr, "command is %s\n", av[0]); 4312 break; 4313 4314 case 'q': 4315 do_quiet = 1; 4316 break; 4317 4318 case 'S': 4319 show_sets = 1; 4320 break; 4321 4322 default: 4323 errx(EX_USAGE, "bad arguments, for usage" 4324 " summary ``ipfw''"); 4325 } 4326 4327 if (cmd != NULL) 4328 break; 4329 } 4330 4331 if (cmd == NULL && ac != optind + 1) { 4332 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 4333 errx(EX_USAGE, "extraneous filename arguments"); 4334 } 4335 4336 if ((f = fopen(filename, "r")) == NULL) 4337 err(EX_UNAVAILABLE, "fopen: %s", filename); 4338 4339 if (cmd != NULL) { /* pipe through preprocessor */ 4340 int pipedes[2]; 4341 4342 if (pipe(pipedes) == -1) 4343 err(EX_OSERR, "cannot create pipe"); 4344 4345 preproc = fork(); 4346 if (preproc == -1) 4347 err(EX_OSERR, "cannot fork"); 4348 4349 if (preproc == 0) { 4350 /* 4351 * Child, will run the preprocessor with the 4352 * file on stdin and the pipe on stdout. 4353 */ 4354 if (dup2(fileno(f), 0) == -1 4355 || dup2(pipedes[1], 1) == -1) 4356 err(EX_OSERR, "dup2()"); 4357 fclose(f); 4358 close(pipedes[1]); 4359 close(pipedes[0]); 4360 execvp(cmd, av); 4361 err(EX_OSERR, "execvp(%s) failed", cmd); 4362 } else { /* parent, will reopen f as the pipe */ 4363 fclose(f); 4364 close(pipedes[1]); 4365 if ((f = fdopen(pipedes[0], "r")) == NULL) { 4366 int savederrno = errno; 4367 4368 (void)kill(preproc, SIGTERM); 4369 errno = savederrno; 4370 err(EX_OSERR, "fdopen()"); 4371 } 4372 } 4373 } 4374 4375 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 4376 char linename[10]; 4377 char *args[1]; 4378 4379 lineno++; 4380 sprintf(linename, "Line %d", lineno); 4381 setprogname(linename); /* XXX */ 4382 args[0] = buf; 4383 ipfw_main(1, args); 4384 } 4385 fclose(f); 4386 if (cmd != NULL) { 4387 int status; 4388 4389 if (waitpid(preproc, &status, 0) == -1) 4390 errx(EX_OSERR, "waitpid()"); 4391 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 4392 errx(EX_UNAVAILABLE, 4393 "preprocessor exited with status %d", 4394 WEXITSTATUS(status)); 4395 else if (WIFSIGNALED(status)) 4396 errx(EX_UNAVAILABLE, 4397 "preprocessor exited with signal %d", 4398 WTERMSIG(status)); 4399 } 4400 } 4401 4402 int 4403 main(int ac, char *av[]) 4404 { 4405 /* 4406 * If the last argument is an absolute pathname, interpret it 4407 * as a file to be preprocessed. 4408 */ 4409 4410 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 4411 ipfw_readfile(ac, av); 4412 else { 4413 if (ipfw_main(ac-1, av+1)) 4414 show_usage(); 4415 } 4416 return EX_OK; 4417 } 4418