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_NETGRAPH, 202 TOK_NGTEE, 203 TOK_FORWARD, 204 TOK_SKIPTO, 205 TOK_DENY, 206 TOK_REJECT, 207 TOK_RESET, 208 TOK_UNREACH, 209 TOK_CHECKSTATE, 210 211 TOK_ALTQ, 212 TOK_LOG, 213 214 TOK_UID, 215 TOK_GID, 216 TOK_JAIL, 217 TOK_IN, 218 TOK_LIMIT, 219 TOK_KEEPSTATE, 220 TOK_LAYER2, 221 TOK_OUT, 222 TOK_DIVERTED, 223 TOK_DIVERTEDLOOPBACK, 224 TOK_DIVERTEDOUTPUT, 225 TOK_XMIT, 226 TOK_RECV, 227 TOK_VIA, 228 TOK_FRAG, 229 TOK_IPOPTS, 230 TOK_IPLEN, 231 TOK_IPID, 232 TOK_IPPRECEDENCE, 233 TOK_IPTOS, 234 TOK_IPTTL, 235 TOK_IPVER, 236 TOK_ESTAB, 237 TOK_SETUP, 238 TOK_TCPDATALEN, 239 TOK_TCPFLAGS, 240 TOK_TCPOPTS, 241 TOK_TCPSEQ, 242 TOK_TCPACK, 243 TOK_TCPWIN, 244 TOK_ICMPTYPES, 245 TOK_MAC, 246 TOK_MACTYPE, 247 TOK_VERREVPATH, 248 TOK_VERSRCREACH, 249 TOK_ANTISPOOF, 250 TOK_IPSEC, 251 TOK_COMMENT, 252 253 TOK_PLR, 254 TOK_NOERROR, 255 TOK_BUCKETS, 256 TOK_DSTIP, 257 TOK_SRCIP, 258 TOK_DSTPORT, 259 TOK_SRCPORT, 260 TOK_ALL, 261 TOK_MASK, 262 TOK_BW, 263 TOK_DELAY, 264 TOK_RED, 265 TOK_GRED, 266 TOK_DROPTAIL, 267 TOK_PROTO, 268 TOK_WEIGHT, 269 }; 270 271 struct _s_x dummynet_params[] = { 272 { "plr", TOK_PLR }, 273 { "noerror", TOK_NOERROR }, 274 { "buckets", TOK_BUCKETS }, 275 { "dst-ip", TOK_DSTIP }, 276 { "src-ip", TOK_SRCIP }, 277 { "dst-port", TOK_DSTPORT }, 278 { "src-port", TOK_SRCPORT }, 279 { "proto", TOK_PROTO }, 280 { "weight", TOK_WEIGHT }, 281 { "all", TOK_ALL }, 282 { "mask", TOK_MASK }, 283 { "droptail", TOK_DROPTAIL }, 284 { "red", TOK_RED }, 285 { "gred", TOK_GRED }, 286 { "bw", TOK_BW }, 287 { "bandwidth", TOK_BW }, 288 { "delay", TOK_DELAY }, 289 { "pipe", TOK_PIPE }, 290 { "queue", TOK_QUEUE }, 291 { "dummynet-params", TOK_NULL }, 292 { NULL, 0 } /* terminator */ 293 }; 294 295 struct _s_x rule_actions[] = { 296 { "accept", TOK_ACCEPT }, 297 { "pass", TOK_ACCEPT }, 298 { "allow", TOK_ACCEPT }, 299 { "permit", TOK_ACCEPT }, 300 { "count", TOK_COUNT }, 301 { "pipe", TOK_PIPE }, 302 { "queue", TOK_QUEUE }, 303 { "divert", TOK_DIVERT }, 304 { "tee", TOK_TEE }, 305 { "netgraph", TOK_NETGRAPH }, 306 { "ngtee", TOK_NGTEE }, 307 { "fwd", TOK_FORWARD }, 308 { "forward", TOK_FORWARD }, 309 { "skipto", TOK_SKIPTO }, 310 { "deny", TOK_DENY }, 311 { "drop", TOK_DENY }, 312 { "reject", TOK_REJECT }, 313 { "reset", TOK_RESET }, 314 { "unreach", TOK_UNREACH }, 315 { "check-state", TOK_CHECKSTATE }, 316 { "//", TOK_COMMENT }, 317 { NULL, 0 } /* terminator */ 318 }; 319 320 struct _s_x rule_action_params[] = { 321 { "altq", TOK_ALTQ }, 322 { "log", TOK_LOG }, 323 { NULL, 0 } /* terminator */ 324 }; 325 326 struct _s_x rule_options[] = { 327 { "uid", TOK_UID }, 328 { "gid", TOK_GID }, 329 { "jail", TOK_JAIL }, 330 { "in", TOK_IN }, 331 { "limit", TOK_LIMIT }, 332 { "keep-state", TOK_KEEPSTATE }, 333 { "bridged", TOK_LAYER2 }, 334 { "layer2", TOK_LAYER2 }, 335 { "out", TOK_OUT }, 336 { "diverted", TOK_DIVERTED }, 337 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 338 { "diverted-output", TOK_DIVERTEDOUTPUT }, 339 { "xmit", TOK_XMIT }, 340 { "recv", TOK_RECV }, 341 { "via", TOK_VIA }, 342 { "fragment", TOK_FRAG }, 343 { "frag", TOK_FRAG }, 344 { "ipoptions", TOK_IPOPTS }, 345 { "ipopts", TOK_IPOPTS }, 346 { "iplen", TOK_IPLEN }, 347 { "ipid", TOK_IPID }, 348 { "ipprecedence", TOK_IPPRECEDENCE }, 349 { "iptos", TOK_IPTOS }, 350 { "ipttl", TOK_IPTTL }, 351 { "ipversion", TOK_IPVER }, 352 { "ipver", TOK_IPVER }, 353 { "estab", TOK_ESTAB }, 354 { "established", TOK_ESTAB }, 355 { "setup", TOK_SETUP }, 356 { "tcpdatalen", TOK_TCPDATALEN }, 357 { "tcpflags", TOK_TCPFLAGS }, 358 { "tcpflgs", TOK_TCPFLAGS }, 359 { "tcpoptions", TOK_TCPOPTS }, 360 { "tcpopts", TOK_TCPOPTS }, 361 { "tcpseq", TOK_TCPSEQ }, 362 { "tcpack", TOK_TCPACK }, 363 { "tcpwin", TOK_TCPWIN }, 364 { "icmptype", TOK_ICMPTYPES }, 365 { "icmptypes", TOK_ICMPTYPES }, 366 { "dst-ip", TOK_DSTIP }, 367 { "src-ip", TOK_SRCIP }, 368 { "dst-port", TOK_DSTPORT }, 369 { "src-port", TOK_SRCPORT }, 370 { "proto", TOK_PROTO }, 371 { "MAC", TOK_MAC }, 372 { "mac", TOK_MAC }, 373 { "mac-type", TOK_MACTYPE }, 374 { "verrevpath", TOK_VERREVPATH }, 375 { "versrcreach", TOK_VERSRCREACH }, 376 { "antispoof", TOK_ANTISPOOF }, 377 { "ipsec", TOK_IPSEC }, 378 { "//", TOK_COMMENT }, 379 380 { "not", TOK_NOT }, /* pseudo option */ 381 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 382 { "or", TOK_OR }, /* pseudo option */ 383 { "|", /* escape */ TOK_OR }, /* pseudo option */ 384 { "{", TOK_STARTBRACE }, /* pseudo option */ 385 { "(", TOK_STARTBRACE }, /* pseudo option */ 386 { "}", TOK_ENDBRACE }, /* pseudo option */ 387 { ")", TOK_ENDBRACE }, /* pseudo option */ 388 { NULL, 0 } /* terminator */ 389 }; 390 391 static __inline uint64_t 392 align_uint64(uint64_t *pll) { 393 uint64_t ret; 394 395 bcopy (pll, &ret, sizeof(ret)); 396 return ret; 397 } 398 399 /* 400 * conditionally runs the command. 401 */ 402 static int 403 do_cmd(int optname, void *optval, uintptr_t optlen) 404 { 405 static int s = -1; /* the socket */ 406 int i; 407 408 if (test_only) 409 return 0; 410 411 if (s == -1) 412 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 413 if (s < 0) 414 err(EX_UNAVAILABLE, "socket"); 415 416 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 417 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 418 optname == IP_FW_TABLE_GETSIZE) 419 i = getsockopt(s, IPPROTO_IP, optname, optval, 420 (socklen_t *)optlen); 421 else 422 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 423 return i; 424 } 425 426 /** 427 * match_token takes a table and a string, returns the value associated 428 * with the string (-1 in case of failure). 429 */ 430 static int 431 match_token(struct _s_x *table, char *string) 432 { 433 struct _s_x *pt; 434 uint i = strlen(string); 435 436 for (pt = table ; i && pt->s != NULL ; pt++) 437 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 438 return pt->x; 439 return -1; 440 } 441 442 /** 443 * match_value takes a table and a value, returns the string associated 444 * with the value (NULL in case of failure). 445 */ 446 static char const * 447 match_value(struct _s_x *p, int value) 448 { 449 for (; p->s != NULL; p++) 450 if (p->x == value) 451 return p->s; 452 return NULL; 453 } 454 455 /* 456 * _substrcmp takes two strings and returns 1 if they do not match, 457 * and 0 if they match exactly or the first string is a sub-string 458 * of the second. A warning is printed to stderr in the case that the 459 * first string is a sub-string of the second. 460 * 461 * This function will be removed in the future through the usual 462 * deprecation process. 463 */ 464 static int 465 _substrcmp(const char *str1, const char* str2) 466 { 467 468 if (strncmp(str1, str2, strlen(str1)) != 0) 469 return 1; 470 471 if (strlen(str1) != strlen(str2)) 472 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 473 str1, str2); 474 return 0; 475 } 476 477 /* 478 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 479 * and 0 if they match exactly or the second string is a sub-string 480 * of the first. A warning is printed to stderr in the case that the 481 * first string does not match the third. 482 * 483 * This function exists to warn about the bizzare construction 484 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 485 * for "bytes". The problem is that in addition to accepting "by", 486 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 487 * other string beginning with "by". 488 * 489 * This function will be removed in the future through the usual 490 * deprecation process. 491 */ 492 static int 493 _substrcmp2(const char *str1, const char* str2, const char* str3) 494 { 495 496 if (strncmp(str1, str2, strlen(str2)) != 0) 497 return 1; 498 499 if (strcmp(str1, str3) != 0) 500 warnx("DEPRECATED: '%s' matched '%s'", 501 str1, str3); 502 return 0; 503 } 504 505 /* 506 * prints one port, symbolic or numeric 507 */ 508 static void 509 print_port(int proto, uint16_t port) 510 { 511 512 if (proto == IPPROTO_ETHERTYPE) { 513 char const *s; 514 515 if (do_resolv && (s = match_value(ether_types, port)) ) 516 printf("%s", s); 517 else 518 printf("0x%04x", port); 519 } else { 520 struct servent *se = NULL; 521 if (do_resolv) { 522 struct protoent *pe = getprotobynumber(proto); 523 524 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 525 } 526 if (se) 527 printf("%s", se->s_name); 528 else 529 printf("%d", port); 530 } 531 } 532 533 struct _s_x _port_name[] = { 534 {"dst-port", O_IP_DSTPORT}, 535 {"src-port", O_IP_SRCPORT}, 536 {"ipid", O_IPID}, 537 {"iplen", O_IPLEN}, 538 {"ipttl", O_IPTTL}, 539 {"mac-type", O_MAC_TYPE}, 540 {"tcpdatalen", O_TCPDATALEN}, 541 {NULL, 0} 542 }; 543 544 /* 545 * Print the values in a list 16-bit items of the types above. 546 * XXX todo: add support for mask. 547 */ 548 static void 549 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 550 { 551 uint16_t *p = cmd->ports; 552 int i; 553 char const *sep; 554 555 if (cmd->o.len & F_NOT) 556 printf(" not"); 557 if (opcode != 0) { 558 sep = match_value(_port_name, opcode); 559 if (sep == NULL) 560 sep = "???"; 561 printf (" %s", sep); 562 } 563 sep = " "; 564 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 565 printf(sep); 566 print_port(proto, p[0]); 567 if (p[0] != p[1]) { 568 printf("-"); 569 print_port(proto, p[1]); 570 } 571 sep = ","; 572 } 573 } 574 575 /* 576 * Like strtol, but also translates service names into port numbers 577 * for some protocols. 578 * In particular: 579 * proto == -1 disables the protocol check; 580 * proto == IPPROTO_ETHERTYPE looks up an internal table 581 * proto == <some value in /etc/protocols> matches the values there. 582 * Returns *end == s in case the parameter is not found. 583 */ 584 static int 585 strtoport(char *s, char **end, int base, int proto) 586 { 587 char *p, *buf; 588 char *s1; 589 int i; 590 591 *end = s; /* default - not found */ 592 if (*s == '\0') 593 return 0; /* not found */ 594 595 if (isdigit(*s)) 596 return strtol(s, end, base); 597 598 /* 599 * find separator. '\\' escapes the next char. 600 */ 601 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 602 if (*s1 == '\\' && s1[1] != '\0') 603 s1++; 604 605 buf = malloc(s1 - s + 1); 606 if (buf == NULL) 607 return 0; 608 609 /* 610 * copy into a buffer skipping backslashes 611 */ 612 for (p = s, i = 0; p != s1 ; p++) 613 if (*p != '\\') 614 buf[i++] = *p; 615 buf[i++] = '\0'; 616 617 if (proto == IPPROTO_ETHERTYPE) { 618 i = match_token(ether_types, buf); 619 free(buf); 620 if (i != -1) { /* found */ 621 *end = s1; 622 return i; 623 } 624 } else { 625 struct protoent *pe = NULL; 626 struct servent *se; 627 628 if (proto != 0) 629 pe = getprotobynumber(proto); 630 setservent(1); 631 se = getservbyname(buf, pe ? pe->p_name : NULL); 632 free(buf); 633 if (se != NULL) { 634 *end = s1; 635 return ntohs(se->s_port); 636 } 637 } 638 return 0; /* not found */ 639 } 640 641 /* 642 * Map between current altq queue id numbers and names. 643 */ 644 static int altq_fetched = 0; 645 static TAILQ_HEAD(, pf_altq) altq_entries = 646 TAILQ_HEAD_INITIALIZER(altq_entries); 647 648 static void 649 altq_set_enabled(int enabled) 650 { 651 int pffd; 652 653 pffd = open("/dev/pf", O_RDWR); 654 if (pffd == -1) 655 err(EX_UNAVAILABLE, 656 "altq support opening pf(4) control device"); 657 if (enabled) { 658 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 659 err(EX_UNAVAILABLE, "enabling altq"); 660 } else { 661 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 662 err(EX_UNAVAILABLE, "disabling altq"); 663 } 664 close(pffd); 665 } 666 667 static void 668 altq_fetch() 669 { 670 struct pfioc_altq pfioc; 671 struct pf_altq *altq; 672 int pffd, mnr; 673 674 if (altq_fetched) 675 return; 676 altq_fetched = 1; 677 pffd = open("/dev/pf", O_RDONLY); 678 if (pffd == -1) { 679 warn("altq support opening pf(4) control device"); 680 return; 681 } 682 bzero(&pfioc, sizeof(pfioc)); 683 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 684 warn("altq support getting queue list"); 685 close(pffd); 686 return; 687 } 688 mnr = pfioc.nr; 689 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 690 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 691 if (errno == EBUSY) 692 break; 693 warn("altq support getting queue list"); 694 close(pffd); 695 return; 696 } 697 if (pfioc.altq.qid == 0) 698 continue; 699 altq = malloc(sizeof(*altq)); 700 if (altq == NULL) 701 err(EX_OSERR, "malloc"); 702 *altq = pfioc.altq; 703 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 704 } 705 close(pffd); 706 } 707 708 static u_int32_t 709 altq_name_to_qid(const char *name) 710 { 711 struct pf_altq *altq; 712 713 altq_fetch(); 714 TAILQ_FOREACH(altq, &altq_entries, entries) 715 if (strcmp(name, altq->qname) == 0) 716 break; 717 if (altq == NULL) 718 errx(EX_DATAERR, "altq has no queue named `%s'", name); 719 return altq->qid; 720 } 721 722 static const char * 723 altq_qid_to_name(u_int32_t qid) 724 { 725 struct pf_altq *altq; 726 727 altq_fetch(); 728 TAILQ_FOREACH(altq, &altq_entries, entries) 729 if (qid == altq->qid) 730 break; 731 if (altq == NULL) 732 return NULL; 733 return altq->qname; 734 } 735 736 static void 737 fill_altq_qid(u_int32_t *qid, const char *av) 738 { 739 *qid = altq_name_to_qid(av); 740 } 741 742 /* 743 * Fill the body of the command with the list of port ranges. 744 */ 745 static int 746 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 747 { 748 uint16_t a, b, *p = cmd->ports; 749 int i = 0; 750 char *s = av; 751 752 while (*s) { 753 a = strtoport(av, &s, 0, proto); 754 if (s == av) /* no parameter */ 755 break; 756 if (*s == '-') { /* a range */ 757 av = s+1; 758 b = strtoport(av, &s, 0, proto); 759 if (s == av) /* no parameter */ 760 break; 761 p[0] = a; 762 p[1] = b; 763 } else if (*s == ',' || *s == '\0' ) 764 p[0] = p[1] = a; 765 else /* invalid separator */ 766 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 767 *s, av); 768 i++; 769 p += 2; 770 av = s+1; 771 } 772 if (i > 0) { 773 if (i+1 > F_LEN_MASK) 774 errx(EX_DATAERR, "too many ports/ranges\n"); 775 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 776 } 777 return i; 778 } 779 780 static struct _s_x icmpcodes[] = { 781 { "net", ICMP_UNREACH_NET }, 782 { "host", ICMP_UNREACH_HOST }, 783 { "protocol", ICMP_UNREACH_PROTOCOL }, 784 { "port", ICMP_UNREACH_PORT }, 785 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 786 { "srcfail", ICMP_UNREACH_SRCFAIL }, 787 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 788 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 789 { "isolated", ICMP_UNREACH_ISOLATED }, 790 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 791 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 792 { "tosnet", ICMP_UNREACH_TOSNET }, 793 { "toshost", ICMP_UNREACH_TOSHOST }, 794 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 795 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 796 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 797 { NULL, 0 } 798 }; 799 800 static void 801 fill_reject_code(u_short *codep, char *str) 802 { 803 int val; 804 char *s; 805 806 val = strtoul(str, &s, 0); 807 if (s == str || *s != '\0' || val >= 0x100) 808 val = match_token(icmpcodes, str); 809 if (val < 0) 810 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 811 *codep = val; 812 return; 813 } 814 815 static void 816 print_reject_code(uint16_t code) 817 { 818 char const *s = match_value(icmpcodes, code); 819 820 if (s != NULL) 821 printf("unreach %s", s); 822 else 823 printf("unreach %u", code); 824 } 825 826 /* 827 * Returns the number of bits set (from left) in a contiguous bitmask, 828 * or -1 if the mask is not contiguous. 829 * XXX this needs a proper fix. 830 * This effectively works on masks in big-endian (network) format. 831 * when compiled on little endian architectures. 832 * 833 * First bit is bit 7 of the first byte -- note, for MAC addresses, 834 * the first bit on the wire is bit 0 of the first byte. 835 * len is the max length in bits. 836 */ 837 static int 838 contigmask(uint8_t *p, int len) 839 { 840 int i, n; 841 842 for (i=0; i<len ; i++) 843 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 844 break; 845 for (n=i+1; n < len; n++) 846 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 847 return -1; /* mask not contiguous */ 848 return i; 849 } 850 851 /* 852 * print flags set/clear in the two bitmasks passed as parameters. 853 * There is a specialized check for f_tcpflags. 854 */ 855 static void 856 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 857 { 858 char const *comma = ""; 859 int i; 860 uint8_t set = cmd->arg1 & 0xff; 861 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 862 863 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 864 printf(" setup"); 865 return; 866 } 867 868 printf(" %s ", name); 869 for (i=0; list[i].x != 0; i++) { 870 if (set & list[i].x) { 871 set &= ~list[i].x; 872 printf("%s%s", comma, list[i].s); 873 comma = ","; 874 } 875 if (clear & list[i].x) { 876 clear &= ~list[i].x; 877 printf("%s!%s", comma, list[i].s); 878 comma = ","; 879 } 880 } 881 } 882 883 /* 884 * Print the ip address contained in a command. 885 */ 886 static void 887 print_ip(ipfw_insn_ip *cmd, char const *s) 888 { 889 struct hostent *he = NULL; 890 int len = F_LEN((ipfw_insn *)cmd); 891 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 892 893 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 894 895 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 896 printf("me"); 897 return; 898 } 899 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 900 cmd->o.opcode == O_IP_DST_LOOKUP) { 901 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 902 if (len == F_INSN_SIZE(ipfw_insn_u32)) 903 printf(",%u", *a); 904 printf(")"); 905 return; 906 } 907 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 908 uint32_t x, *map = (uint32_t *)&(cmd->mask); 909 int i, j; 910 char comma = '{'; 911 912 x = cmd->o.arg1 - 1; 913 x = htonl( ~x ); 914 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 915 printf("%s/%d", inet_ntoa(cmd->addr), 916 contigmask((uint8_t *)&x, 32)); 917 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 918 x &= 0xff; /* base */ 919 /* 920 * Print bits and ranges. 921 * Locate first bit set (i), then locate first bit unset (j). 922 * If we have 3+ consecutive bits set, then print them as a 923 * range, otherwise only print the initial bit and rescan. 924 */ 925 for (i=0; i < cmd->o.arg1; i++) 926 if (map[i/32] & (1<<(i & 31))) { 927 for (j=i+1; j < cmd->o.arg1; j++) 928 if (!(map[ j/32] & (1<<(j & 31)))) 929 break; 930 printf("%c%d", comma, i+x); 931 if (j>i+2) { /* range has at least 3 elements */ 932 printf("-%d", j-1+x); 933 i = j-1; 934 } 935 comma = ','; 936 } 937 printf("}"); 938 return; 939 } 940 /* 941 * len == 2 indicates a single IP, whereas lists of 1 or more 942 * addr/mask pairs have len = (2n+1). We convert len to n so we 943 * use that to count the number of entries. 944 */ 945 for (len = len / 2; len > 0; len--, a += 2) { 946 int mb = /* mask length */ 947 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 948 32 : contigmask((uint8_t *)&(a[1]), 32); 949 if (mb == 32 && do_resolv) 950 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 951 if (he != NULL) /* resolved to name */ 952 printf("%s", he->h_name); 953 else if (mb == 0) /* any */ 954 printf("any"); 955 else { /* numeric IP followed by some kind of mask */ 956 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 957 if (mb < 0) 958 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 959 else if (mb < 32) 960 printf("/%d", mb); 961 } 962 if (len > 1) 963 printf(","); 964 } 965 } 966 967 /* 968 * prints a MAC address/mask pair 969 */ 970 static void 971 print_mac(uint8_t *addr, uint8_t *mask) 972 { 973 int l = contigmask(mask, 48); 974 975 if (l == 0) 976 printf(" any"); 977 else { 978 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 979 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 980 if (l == -1) 981 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 982 mask[0], mask[1], mask[2], 983 mask[3], mask[4], mask[5]); 984 else if (l < 48) 985 printf("/%d", l); 986 } 987 } 988 989 static void 990 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 991 { 992 uint8_t type; 993 994 cmd->d[0] = 0; 995 while (*av) { 996 if (*av == ',') 997 av++; 998 999 type = strtoul(av, &av, 0); 1000 1001 if (*av != ',' && *av != '\0') 1002 errx(EX_DATAERR, "invalid ICMP type"); 1003 1004 if (type > 31) 1005 errx(EX_DATAERR, "ICMP type out of range"); 1006 1007 cmd->d[0] |= 1 << type; 1008 } 1009 cmd->o.opcode = O_ICMPTYPE; 1010 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1011 } 1012 1013 static void 1014 print_icmptypes(ipfw_insn_u32 *cmd) 1015 { 1016 int i; 1017 char sep= ' '; 1018 1019 printf(" icmptypes"); 1020 for (i = 0; i < 32; i++) { 1021 if ( (cmd->d[0] & (1 << (i))) == 0) 1022 continue; 1023 printf("%c%d", sep, i); 1024 sep = ','; 1025 } 1026 } 1027 1028 /* 1029 * show_ipfw() prints the body of an ipfw rule. 1030 * Because the standard rule has at least proto src_ip dst_ip, we use 1031 * a helper function to produce these entries if not provided explicitly. 1032 * The first argument is the list of fields we have, the second is 1033 * the list of fields we want to be printed. 1034 * 1035 * Special cases if we have provided a MAC header: 1036 * + if the rule does not contain IP addresses/ports, do not print them; 1037 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1038 * 1039 * Once we have 'have_options', IP header fields are printed as options. 1040 */ 1041 #define HAVE_PROTO 0x0001 1042 #define HAVE_SRCIP 0x0002 1043 #define HAVE_DSTIP 0x0004 1044 #define HAVE_MAC 0x0008 1045 #define HAVE_MACTYPE 0x0010 1046 #define HAVE_OPTIONS 0x8000 1047 1048 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1049 static void 1050 show_prerequisites(int *flags, int want, int cmd) 1051 { 1052 if (comment_only) 1053 return; 1054 if ( (*flags & HAVE_IP) == HAVE_IP) 1055 *flags |= HAVE_OPTIONS; 1056 1057 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 1058 cmd != O_MAC_TYPE) { 1059 /* 1060 * mac-type was optimized out by the compiler, 1061 * restore it 1062 */ 1063 printf(" any"); 1064 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 1065 return; 1066 } 1067 if ( !(*flags & HAVE_OPTIONS)) { 1068 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1069 printf(" ip"); 1070 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1071 printf(" from any"); 1072 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1073 printf(" to any"); 1074 } 1075 *flags |= want; 1076 } 1077 1078 static void 1079 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1080 { 1081 static int twidth = 0; 1082 int l; 1083 ipfw_insn *cmd; 1084 char *comment = NULL; /* ptr to comment if we have one */ 1085 int proto = 0; /* default */ 1086 int flags = 0; /* prerequisites */ 1087 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1088 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1089 int or_block = 0; /* we are in an or block */ 1090 uint32_t set_disable; 1091 1092 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1093 1094 if (set_disable & (1 << rule->set)) { /* disabled */ 1095 if (!show_sets) 1096 return; 1097 else 1098 printf("# DISABLED "); 1099 } 1100 printf("%05u ", rule->rulenum); 1101 1102 if (pcwidth>0 || bcwidth>0) 1103 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1104 bcwidth, align_uint64(&rule->bcnt)); 1105 1106 if (do_time == 2) 1107 printf("%10u ", rule->timestamp); 1108 else if (do_time == 1) { 1109 char timestr[30]; 1110 time_t t = (time_t)0; 1111 1112 if (twidth == 0) { 1113 strcpy(timestr, ctime(&t)); 1114 *strchr(timestr, '\n') = '\0'; 1115 twidth = strlen(timestr); 1116 } 1117 if (rule->timestamp) { 1118 #if _FreeBSD_version < 500000 /* XXX check */ 1119 #define _long_to_time(x) (time_t)(x) 1120 #endif 1121 t = _long_to_time(rule->timestamp); 1122 1123 strcpy(timestr, ctime(&t)); 1124 *strchr(timestr, '\n') = '\0'; 1125 printf("%s ", timestr); 1126 } else { 1127 printf("%*s", twidth, " "); 1128 } 1129 } 1130 1131 if (show_sets) 1132 printf("set %d ", rule->set); 1133 1134 /* 1135 * print the optional "match probability" 1136 */ 1137 if (rule->cmd_len > 0) { 1138 cmd = rule->cmd ; 1139 if (cmd->opcode == O_PROB) { 1140 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1141 double d = 1.0 * p->d[0]; 1142 1143 d = (d / 0x7fffffff); 1144 printf("prob %f ", d); 1145 } 1146 } 1147 1148 /* 1149 * first print actions 1150 */ 1151 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1152 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1153 switch(cmd->opcode) { 1154 case O_CHECK_STATE: 1155 printf("check-state"); 1156 flags = HAVE_IP; /* avoid printing anything else */ 1157 break; 1158 1159 case O_ACCEPT: 1160 printf("allow"); 1161 break; 1162 1163 case O_COUNT: 1164 printf("count"); 1165 break; 1166 1167 case O_DENY: 1168 printf("deny"); 1169 break; 1170 1171 case O_REJECT: 1172 if (cmd->arg1 == ICMP_REJECT_RST) 1173 printf("reset"); 1174 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1175 printf("reject"); 1176 else 1177 print_reject_code(cmd->arg1); 1178 break; 1179 1180 case O_SKIPTO: 1181 printf("skipto %u", cmd->arg1); 1182 break; 1183 1184 case O_PIPE: 1185 printf("pipe %u", cmd->arg1); 1186 break; 1187 1188 case O_QUEUE: 1189 printf("queue %u", cmd->arg1); 1190 break; 1191 1192 case O_DIVERT: 1193 printf("divert %u", cmd->arg1); 1194 break; 1195 1196 case O_TEE: 1197 printf("tee %u", cmd->arg1); 1198 break; 1199 1200 case O_NETGRAPH: 1201 printf("netgraph %u", cmd->arg1); 1202 break; 1203 1204 case O_NGTEE: 1205 printf("ngtee %u", cmd->arg1); 1206 break; 1207 1208 case O_FORWARD_IP: 1209 { 1210 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1211 1212 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1213 if (s->sa.sin_port) 1214 printf(",%d", s->sa.sin_port); 1215 } 1216 break; 1217 1218 case O_LOG: /* O_LOG is printed last */ 1219 logptr = (ipfw_insn_log *)cmd; 1220 break; 1221 1222 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1223 altqptr = (ipfw_insn_altq *)cmd; 1224 break; 1225 1226 default: 1227 printf("** unrecognized action %d len %d ", 1228 cmd->opcode, cmd->len); 1229 } 1230 } 1231 if (logptr) { 1232 if (logptr->max_log > 0) 1233 printf(" log logamount %d", logptr->max_log); 1234 else 1235 printf(" log"); 1236 } 1237 if (altqptr) { 1238 const char *qname; 1239 1240 qname = altq_qid_to_name(altqptr->qid); 1241 if (qname == NULL) 1242 printf(" altq ?<%u>", altqptr->qid); 1243 else 1244 printf(" altq %s", qname); 1245 } 1246 1247 /* 1248 * then print the body. 1249 */ 1250 if (rule->_pad & 1) { /* empty rules before options */ 1251 if (!do_compact) 1252 printf(" ip from any to any"); 1253 flags |= HAVE_IP | HAVE_OPTIONS; 1254 } 1255 1256 if (comment_only) 1257 comment = "..."; 1258 1259 for (l = rule->act_ofs, cmd = rule->cmd ; 1260 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1261 /* useful alias */ 1262 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1263 1264 if (comment_only) { 1265 if (cmd->opcode != O_NOP) 1266 continue; 1267 printf(" // %s\n", (char *)(cmd + 1)); 1268 return; 1269 } 1270 1271 show_prerequisites(&flags, 0, cmd->opcode); 1272 1273 switch(cmd->opcode) { 1274 case O_PROB: 1275 break; /* done already */ 1276 1277 case O_PROBE_STATE: 1278 break; /* no need to print anything here */ 1279 1280 case O_MACADDR2: { 1281 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1282 1283 if ((cmd->len & F_OR) && !or_block) 1284 printf(" {"); 1285 if (cmd->len & F_NOT) 1286 printf(" not"); 1287 printf(" MAC"); 1288 flags |= HAVE_MAC; 1289 print_mac(m->addr, m->mask); 1290 print_mac(m->addr + 6, m->mask + 6); 1291 } 1292 break; 1293 1294 case O_MAC_TYPE: 1295 if ((cmd->len & F_OR) && !or_block) 1296 printf(" {"); 1297 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1298 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1299 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1300 break; 1301 1302 case O_IP_SRC: 1303 case O_IP_SRC_LOOKUP: 1304 case O_IP_SRC_MASK: 1305 case O_IP_SRC_ME: 1306 case O_IP_SRC_SET: 1307 show_prerequisites(&flags, HAVE_PROTO, 0); 1308 if (!(flags & HAVE_SRCIP)) 1309 printf(" from"); 1310 if ((cmd->len & F_OR) && !or_block) 1311 printf(" {"); 1312 print_ip((ipfw_insn_ip *)cmd, 1313 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1314 flags |= HAVE_SRCIP; 1315 break; 1316 1317 case O_IP_DST: 1318 case O_IP_DST_LOOKUP: 1319 case O_IP_DST_MASK: 1320 case O_IP_DST_ME: 1321 case O_IP_DST_SET: 1322 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1323 if (!(flags & HAVE_DSTIP)) 1324 printf(" to"); 1325 if ((cmd->len & F_OR) && !or_block) 1326 printf(" {"); 1327 print_ip((ipfw_insn_ip *)cmd, 1328 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1329 flags |= HAVE_DSTIP; 1330 break; 1331 1332 case O_IP_DSTPORT: 1333 show_prerequisites(&flags, HAVE_IP, 0); 1334 case O_IP_SRCPORT: 1335 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1336 if ((cmd->len & F_OR) && !or_block) 1337 printf(" {"); 1338 print_newports((ipfw_insn_u16 *)cmd, proto, 1339 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1340 break; 1341 1342 case O_PROTO: { 1343 struct protoent *pe; 1344 1345 if ((cmd->len & F_OR) && !or_block) 1346 printf(" {"); 1347 if (cmd->len & F_NOT) 1348 printf(" not"); 1349 proto = cmd->arg1; 1350 pe = getprotobynumber(cmd->arg1); 1351 if (flags & HAVE_OPTIONS) 1352 printf(" proto"); 1353 if (pe) 1354 printf(" %s", pe->p_name); 1355 else 1356 printf(" %u", cmd->arg1); 1357 } 1358 flags |= HAVE_PROTO; 1359 break; 1360 1361 default: /*options ... */ 1362 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1363 if ((cmd->len & F_OR) && !or_block) 1364 printf(" {"); 1365 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1366 printf(" not"); 1367 switch(cmd->opcode) { 1368 case O_FRAG: 1369 printf(" frag"); 1370 break; 1371 1372 case O_IN: 1373 printf(cmd->len & F_NOT ? " out" : " in"); 1374 break; 1375 1376 case O_DIVERTED: 1377 switch (cmd->arg1) { 1378 case 3: 1379 printf(" diverted"); 1380 break; 1381 case 1: 1382 printf(" diverted-loopback"); 1383 break; 1384 case 2: 1385 printf(" diverted-output"); 1386 break; 1387 default: 1388 printf(" diverted-?<%u>", cmd->arg1); 1389 break; 1390 } 1391 break; 1392 1393 case O_LAYER2: 1394 printf(" layer2"); 1395 break; 1396 case O_XMIT: 1397 case O_RECV: 1398 case O_VIA: 1399 { 1400 char const *s; 1401 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1402 1403 if (cmd->opcode == O_XMIT) 1404 s = "xmit"; 1405 else if (cmd->opcode == O_RECV) 1406 s = "recv"; 1407 else /* if (cmd->opcode == O_VIA) */ 1408 s = "via"; 1409 if (cmdif->name[0] == '\0') 1410 printf(" %s %s", s, 1411 inet_ntoa(cmdif->p.ip)); 1412 else 1413 printf(" %s %s", s, cmdif->name); 1414 1415 break; 1416 } 1417 case O_IPID: 1418 if (F_LEN(cmd) == 1) 1419 printf(" ipid %u", cmd->arg1 ); 1420 else 1421 print_newports((ipfw_insn_u16 *)cmd, 0, 1422 O_IPID); 1423 break; 1424 1425 case O_IPTTL: 1426 if (F_LEN(cmd) == 1) 1427 printf(" ipttl %u", cmd->arg1 ); 1428 else 1429 print_newports((ipfw_insn_u16 *)cmd, 0, 1430 O_IPTTL); 1431 break; 1432 1433 case O_IPVER: 1434 printf(" ipver %u", cmd->arg1 ); 1435 break; 1436 1437 case O_IPPRECEDENCE: 1438 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1439 break; 1440 1441 case O_IPLEN: 1442 if (F_LEN(cmd) == 1) 1443 printf(" iplen %u", cmd->arg1 ); 1444 else 1445 print_newports((ipfw_insn_u16 *)cmd, 0, 1446 O_IPLEN); 1447 break; 1448 1449 case O_IPOPT: 1450 print_flags("ipoptions", cmd, f_ipopts); 1451 break; 1452 1453 case O_IPTOS: 1454 print_flags("iptos", cmd, f_iptos); 1455 break; 1456 1457 case O_ICMPTYPE: 1458 print_icmptypes((ipfw_insn_u32 *)cmd); 1459 break; 1460 1461 case O_ESTAB: 1462 printf(" established"); 1463 break; 1464 1465 case O_TCPDATALEN: 1466 if (F_LEN(cmd) == 1) 1467 printf(" tcpdatalen %u", cmd->arg1 ); 1468 else 1469 print_newports((ipfw_insn_u16 *)cmd, 0, 1470 O_TCPDATALEN); 1471 break; 1472 1473 case O_TCPFLAGS: 1474 print_flags("tcpflags", cmd, f_tcpflags); 1475 break; 1476 1477 case O_TCPOPTS: 1478 print_flags("tcpoptions", cmd, f_tcpopts); 1479 break; 1480 1481 case O_TCPWIN: 1482 printf(" tcpwin %d", ntohs(cmd->arg1)); 1483 break; 1484 1485 case O_TCPACK: 1486 printf(" tcpack %d", ntohl(cmd32->d[0])); 1487 break; 1488 1489 case O_TCPSEQ: 1490 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1491 break; 1492 1493 case O_UID: 1494 { 1495 struct passwd *pwd = getpwuid(cmd32->d[0]); 1496 1497 if (pwd) 1498 printf(" uid %s", pwd->pw_name); 1499 else 1500 printf(" uid %u", cmd32->d[0]); 1501 } 1502 break; 1503 1504 case O_GID: 1505 { 1506 struct group *grp = getgrgid(cmd32->d[0]); 1507 1508 if (grp) 1509 printf(" gid %s", grp->gr_name); 1510 else 1511 printf(" gid %u", cmd32->d[0]); 1512 } 1513 break; 1514 1515 case O_JAIL: 1516 printf(" jail %d", cmd32->d[0]); 1517 break; 1518 1519 case O_VERREVPATH: 1520 printf(" verrevpath"); 1521 break; 1522 1523 case O_VERSRCREACH: 1524 printf(" versrcreach"); 1525 break; 1526 1527 case O_ANTISPOOF: 1528 printf(" antispoof"); 1529 break; 1530 1531 case O_IPSEC: 1532 printf(" ipsec"); 1533 break; 1534 1535 case O_NOP: 1536 comment = (char *)(cmd + 1); 1537 break; 1538 1539 case O_KEEP_STATE: 1540 printf(" keep-state"); 1541 break; 1542 1543 case O_LIMIT: 1544 { 1545 struct _s_x *p = limit_masks; 1546 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1547 uint8_t x = c->limit_mask; 1548 char const *comma = " "; 1549 1550 printf(" limit"); 1551 for (; p->x != 0 ; p++) 1552 if ((x & p->x) == p->x) { 1553 x &= ~p->x; 1554 printf("%s%s", comma, p->s); 1555 comma = ","; 1556 } 1557 printf(" %d", c->conn_limit); 1558 } 1559 break; 1560 1561 default: 1562 printf(" [opcode %d len %d]", 1563 cmd->opcode, cmd->len); 1564 } 1565 } 1566 if (cmd->len & F_OR) { 1567 printf(" or"); 1568 or_block = 1; 1569 } else if (or_block) { 1570 printf(" }"); 1571 or_block = 0; 1572 } 1573 } 1574 show_prerequisites(&flags, HAVE_IP, 0); 1575 if (comment) 1576 printf(" // %s", comment); 1577 printf("\n"); 1578 } 1579 1580 static void 1581 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1582 { 1583 struct protoent *pe; 1584 struct in_addr a; 1585 uint16_t rulenum; 1586 1587 if (!do_expired) { 1588 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1589 return; 1590 } 1591 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1592 printf("%05d", rulenum); 1593 if (pcwidth>0 || bcwidth>0) 1594 printf(" %*llu %*llu (%ds)", pcwidth, 1595 align_uint64(&d->pcnt), bcwidth, 1596 align_uint64(&d->bcnt), d->expire); 1597 switch (d->dyn_type) { 1598 case O_LIMIT_PARENT: 1599 printf(" PARENT %d", d->count); 1600 break; 1601 case O_LIMIT: 1602 printf(" LIMIT"); 1603 break; 1604 case O_KEEP_STATE: /* bidir, no mask */ 1605 printf(" STATE"); 1606 break; 1607 } 1608 1609 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1610 printf(" %s", pe->p_name); 1611 else 1612 printf(" proto %u", d->id.proto); 1613 1614 a.s_addr = htonl(d->id.src_ip); 1615 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1616 1617 a.s_addr = htonl(d->id.dst_ip); 1618 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1619 printf("\n"); 1620 } 1621 1622 static int 1623 sort_q(const void *pa, const void *pb) 1624 { 1625 int rev = (do_sort < 0); 1626 int field = rev ? -do_sort : do_sort; 1627 long long res = 0; 1628 const struct dn_flow_queue *a = pa; 1629 const struct dn_flow_queue *b = pb; 1630 1631 switch (field) { 1632 case 1: /* pkts */ 1633 res = a->len - b->len; 1634 break; 1635 case 2: /* bytes */ 1636 res = a->len_bytes - b->len_bytes; 1637 break; 1638 1639 case 3: /* tot pkts */ 1640 res = a->tot_pkts - b->tot_pkts; 1641 break; 1642 1643 case 4: /* tot bytes */ 1644 res = a->tot_bytes - b->tot_bytes; 1645 break; 1646 } 1647 if (res < 0) 1648 res = -1; 1649 if (res > 0) 1650 res = 1; 1651 return (int)(rev ? res : -res); 1652 } 1653 1654 static void 1655 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1656 { 1657 int l; 1658 1659 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1660 fs->flow_mask.proto, 1661 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1662 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1663 if (fs->rq_elements == 0) 1664 return; 1665 1666 printf("BKT Prot ___Source IP/port____ " 1667 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1668 if (do_sort != 0) 1669 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1670 for (l = 0; l < fs->rq_elements; l++) { 1671 struct in_addr ina; 1672 struct protoent *pe; 1673 1674 ina.s_addr = htonl(q[l].id.src_ip); 1675 printf("%3d ", q[l].hash_slot); 1676 pe = getprotobynumber(q[l].id.proto); 1677 if (pe) 1678 printf("%-4s ", pe->p_name); 1679 else 1680 printf("%4u ", q[l].id.proto); 1681 printf("%15s/%-5d ", 1682 inet_ntoa(ina), q[l].id.src_port); 1683 ina.s_addr = htonl(q[l].id.dst_ip); 1684 printf("%15s/%-5d ", 1685 inet_ntoa(ina), q[l].id.dst_port); 1686 printf("%4qu %8qu %2u %4u %3u\n", 1687 q[l].tot_pkts, q[l].tot_bytes, 1688 q[l].len, q[l].len_bytes, q[l].drops); 1689 if (verbose) 1690 printf(" S %20qd F %20qd\n", 1691 q[l].S, q[l].F); 1692 } 1693 } 1694 1695 static void 1696 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 1697 { 1698 int l; 1699 char qs[30]; 1700 char plr[30]; 1701 char red[90]; /* Display RED parameters */ 1702 1703 l = fs->qsize; 1704 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1705 if (l >= 8192) 1706 sprintf(qs, "%d KB", l / 1024); 1707 else 1708 sprintf(qs, "%d B", l); 1709 } else 1710 sprintf(qs, "%3d sl.", l); 1711 if (fs->plr) 1712 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1713 else 1714 plr[0] = '\0'; 1715 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1716 sprintf(red, 1717 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1718 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1719 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1720 SCALE_VAL(fs->min_th), 1721 SCALE_VAL(fs->max_th), 1722 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1723 else 1724 sprintf(red, "droptail"); 1725 1726 printf("%s %s%s %d queues (%d buckets) %s\n", 1727 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1728 } 1729 1730 static void 1731 list_pipes(void *data, uint nbytes, int ac, char *av[]) 1732 { 1733 int rulenum; 1734 void *next = data; 1735 struct dn_pipe *p = (struct dn_pipe *) data; 1736 struct dn_flow_set *fs; 1737 struct dn_flow_queue *q; 1738 int l; 1739 1740 if (ac > 0) 1741 rulenum = strtoul(*av++, NULL, 10); 1742 else 1743 rulenum = 0; 1744 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 1745 double b = p->bandwidth; 1746 char buf[30]; 1747 char prefix[80]; 1748 1749 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 1750 break; /* done with pipes, now queues */ 1751 1752 /* 1753 * compute length, as pipe have variable size 1754 */ 1755 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1756 next = (char *)p + l; 1757 nbytes -= l; 1758 1759 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 1760 continue; 1761 1762 /* 1763 * Print rate (or clocking interface) 1764 */ 1765 if (p->if_name[0] != '\0') 1766 sprintf(buf, "%s", p->if_name); 1767 else if (b == 0) 1768 sprintf(buf, "unlimited"); 1769 else if (b >= 1000000) 1770 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1771 else if (b >= 1000) 1772 sprintf(buf, "%7.3f Kbit/s", b/1000); 1773 else 1774 sprintf(buf, "%7.3f bit/s ", b); 1775 1776 sprintf(prefix, "%05d: %s %4d ms ", 1777 p->pipe_nr, buf, p->delay); 1778 print_flowset_parms(&(p->fs), prefix); 1779 if (verbose) 1780 printf(" V %20qd\n", p->V >> MY_M); 1781 1782 q = (struct dn_flow_queue *)(p+1); 1783 list_queues(&(p->fs), q); 1784 } 1785 for (fs = next; nbytes >= sizeof *fs; fs = next) { 1786 char prefix[80]; 1787 1788 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 1789 break; 1790 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1791 next = (char *)fs + l; 1792 nbytes -= l; 1793 1794 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 1795 (rulenum != fs->parent_nr && do_pipe == 1))) { 1796 continue; 1797 } 1798 1799 q = (struct dn_flow_queue *)(fs+1); 1800 sprintf(prefix, "q%05d: weight %d pipe %d ", 1801 fs->fs_nr, fs->weight, fs->parent_nr); 1802 print_flowset_parms(fs, prefix); 1803 list_queues(fs, q); 1804 } 1805 } 1806 1807 /* 1808 * This one handles all set-related commands 1809 * ipfw set { show | enable | disable } 1810 * ipfw set swap X Y 1811 * ipfw set move X to Y 1812 * ipfw set move rule X to Y 1813 */ 1814 static void 1815 sets_handler(int ac, char *av[]) 1816 { 1817 uint32_t set_disable, masks[2]; 1818 int i, nbytes; 1819 uint16_t rulenum; 1820 uint8_t cmd, new_set; 1821 1822 ac--; 1823 av++; 1824 1825 if (!ac) 1826 errx(EX_USAGE, "set needs command"); 1827 if (_substrcmp(*av, "show") == 0) { 1828 void *data; 1829 char const *msg; 1830 1831 nbytes = sizeof(struct ip_fw); 1832 if ((data = calloc(1, nbytes)) == NULL) 1833 err(EX_OSERR, "calloc"); 1834 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 1835 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1836 bcopy(&((struct ip_fw *)data)->next_rule, 1837 &set_disable, sizeof(set_disable)); 1838 1839 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 1840 if ((set_disable & (1<<i))) { 1841 printf("%s %d", msg, i); 1842 msg = ""; 1843 } 1844 msg = (set_disable) ? " enable" : "enable"; 1845 for (i = 0; i < RESVD_SET; i++) 1846 if (!(set_disable & (1<<i))) { 1847 printf("%s %d", msg, i); 1848 msg = ""; 1849 } 1850 printf("\n"); 1851 } else if (_substrcmp(*av, "swap") == 0) { 1852 ac--; av++; 1853 if (ac != 2) 1854 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1855 rulenum = atoi(av[0]); 1856 new_set = atoi(av[1]); 1857 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 1858 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1859 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 1860 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1861 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1862 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 1863 } else if (_substrcmp(*av, "move") == 0) { 1864 ac--; av++; 1865 if (ac && _substrcmp(*av, "rule") == 0) { 1866 cmd = 2; 1867 ac--; av++; 1868 } else 1869 cmd = 3; 1870 if (ac != 3 || _substrcmp(av[1], "to") != 0) 1871 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1872 rulenum = atoi(av[0]); 1873 new_set = atoi(av[2]); 1874 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 1875 (cmd == 2 && rulenum == 65535) ) 1876 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1877 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 1878 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1879 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1880 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 1881 } else if (_substrcmp(*av, "disable") == 0 || 1882 _substrcmp(*av, "enable") == 0 ) { 1883 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 1884 1885 ac--; av++; 1886 masks[0] = masks[1] = 0; 1887 1888 while (ac) { 1889 if (isdigit(**av)) { 1890 i = atoi(*av); 1891 if (i < 0 || i > RESVD_SET) 1892 errx(EX_DATAERR, 1893 "invalid set number %d\n", i); 1894 masks[which] |= (1<<i); 1895 } else if (_substrcmp(*av, "disable") == 0) 1896 which = 0; 1897 else if (_substrcmp(*av, "enable") == 0) 1898 which = 1; 1899 else 1900 errx(EX_DATAERR, 1901 "invalid set command %s\n", *av); 1902 av++; ac--; 1903 } 1904 if ( (masks[0] & masks[1]) != 0 ) 1905 errx(EX_DATAERR, 1906 "cannot enable and disable the same set\n"); 1907 1908 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 1909 if (i) 1910 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1911 } else 1912 errx(EX_USAGE, "invalid set command %s\n", *av); 1913 } 1914 1915 static void 1916 sysctl_handler(int ac, char *av[], int which) 1917 { 1918 ac--; 1919 av++; 1920 1921 if (ac == 0) { 1922 warnx("missing keyword to enable/disable\n"); 1923 } else if (_substrcmp(*av, "firewall") == 0) { 1924 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1925 &which, sizeof(which)); 1926 } else if (_substrcmp(*av, "one_pass") == 0) { 1927 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1928 &which, sizeof(which)); 1929 } else if (_substrcmp(*av, "debug") == 0) { 1930 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1931 &which, sizeof(which)); 1932 } else if (_substrcmp(*av, "verbose") == 0) { 1933 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1934 &which, sizeof(which)); 1935 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 1936 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1937 &which, sizeof(which)); 1938 } else if (_substrcmp(*av, "altq") == 0) { 1939 altq_set_enabled(which); 1940 } else { 1941 warnx("unrecognize enable/disable keyword: %s\n", *av); 1942 } 1943 } 1944 1945 static void 1946 list(int ac, char *av[], int show_counters) 1947 { 1948 struct ip_fw *r; 1949 ipfw_dyn_rule *dynrules, *d; 1950 1951 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 1952 char *lim; 1953 void *data = NULL; 1954 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1955 int exitval = EX_OK; 1956 int lac; 1957 char **lav; 1958 u_long rnum, last; 1959 char *endptr; 1960 int seen = 0; 1961 1962 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1963 int nalloc = 1024; /* start somewhere... */ 1964 1965 last = 0; 1966 1967 if (test_only) { 1968 fprintf(stderr, "Testing only, list disabled\n"); 1969 return; 1970 } 1971 1972 ac--; 1973 av++; 1974 1975 /* get rules or pipes from kernel, resizing array as necessary */ 1976 nbytes = nalloc; 1977 1978 while (nbytes >= nalloc) { 1979 nalloc = nalloc * 2 + 200; 1980 nbytes = nalloc; 1981 if ((data = realloc(data, nbytes)) == NULL) 1982 err(EX_OSERR, "realloc"); 1983 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 1984 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1985 do_pipe ? "DUMMYNET" : "FW"); 1986 } 1987 1988 if (do_pipe) { 1989 list_pipes(data, nbytes, ac, av); 1990 goto done; 1991 } 1992 1993 /* 1994 * Count static rules. They have variable size so we 1995 * need to scan the list to count them. 1996 */ 1997 for (nstat = 1, r = data, lim = (char *)data + nbytes; 1998 r->rulenum < 65535 && (char *)r < lim; 1999 ++nstat, r = NEXT(r) ) 2000 ; /* nothing */ 2001 2002 /* 2003 * Count dynamic rules. This is easier as they have 2004 * fixed size. 2005 */ 2006 r = NEXT(r); 2007 dynrules = (ipfw_dyn_rule *)r ; 2008 n = (char *)r - (char *)data; 2009 ndyn = (nbytes - n) / sizeof *dynrules; 2010 2011 /* if showing stats, figure out column widths ahead of time */ 2012 bcwidth = pcwidth = 0; 2013 if (show_counters) { 2014 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2015 /* packet counter */ 2016 width = snprintf(NULL, 0, "%llu", 2017 align_uint64(&r->pcnt)); 2018 if (width > pcwidth) 2019 pcwidth = width; 2020 2021 /* byte counter */ 2022 width = snprintf(NULL, 0, "%llu", 2023 align_uint64(&r->bcnt)); 2024 if (width > bcwidth) 2025 bcwidth = width; 2026 } 2027 } 2028 if (do_dynamic && ndyn) { 2029 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2030 width = snprintf(NULL, 0, "%llu", 2031 align_uint64(&d->pcnt)); 2032 if (width > pcwidth) 2033 pcwidth = width; 2034 2035 width = snprintf(NULL, 0, "%llu", 2036 align_uint64(&d->bcnt)); 2037 if (width > bcwidth) 2038 bcwidth = width; 2039 } 2040 } 2041 /* if no rule numbers were specified, list all rules */ 2042 if (ac == 0) { 2043 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2044 show_ipfw(r, pcwidth, bcwidth); 2045 2046 if (do_dynamic && ndyn) { 2047 printf("## Dynamic rules (%d):\n", ndyn); 2048 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2049 show_dyn_ipfw(d, pcwidth, bcwidth); 2050 } 2051 goto done; 2052 } 2053 2054 /* display specific rules requested on command line */ 2055 2056 for (lac = ac, lav = av; lac != 0; lac--) { 2057 /* convert command line rule # */ 2058 last = rnum = strtoul(*lav++, &endptr, 10); 2059 if (*endptr == '-') 2060 last = strtoul(endptr+1, &endptr, 10); 2061 if (*endptr) { 2062 exitval = EX_USAGE; 2063 warnx("invalid rule number: %s", *(lav - 1)); 2064 continue; 2065 } 2066 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2067 if (r->rulenum > last) 2068 break; 2069 if (r->rulenum >= rnum && r->rulenum <= last) { 2070 show_ipfw(r, pcwidth, bcwidth); 2071 seen = 1; 2072 } 2073 } 2074 if (!seen) { 2075 /* give precedence to other error(s) */ 2076 if (exitval == EX_OK) 2077 exitval = EX_UNAVAILABLE; 2078 warnx("rule %lu does not exist", rnum); 2079 } 2080 } 2081 2082 if (do_dynamic && ndyn) { 2083 printf("## Dynamic rules:\n"); 2084 for (lac = ac, lav = av; lac != 0; lac--) { 2085 rnum = strtoul(*lav++, &endptr, 10); 2086 if (*endptr == '-') 2087 last = strtoul(endptr+1, &endptr, 10); 2088 if (*endptr) 2089 /* already warned */ 2090 continue; 2091 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2092 uint16_t rulenum; 2093 2094 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2095 if (rulenum > rnum) 2096 break; 2097 if (r->rulenum >= rnum && r->rulenum <= last) 2098 show_dyn_ipfw(d, pcwidth, bcwidth); 2099 } 2100 } 2101 } 2102 2103 ac = 0; 2104 2105 done: 2106 free(data); 2107 2108 if (exitval != EX_OK) 2109 exit(exitval); 2110 #undef NEXT 2111 } 2112 2113 static void 2114 show_usage(void) 2115 { 2116 fprintf(stderr, "usage: ipfw [options]\n" 2117 "do \"ipfw -h\" or see ipfw manpage for details\n" 2118 ); 2119 exit(EX_USAGE); 2120 } 2121 2122 static void 2123 help(void) 2124 { 2125 fprintf(stderr, 2126 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2127 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2128 "add [num] [set N] [prob x] RULE-BODY\n" 2129 "{pipe|queue} N config PIPE-BODY\n" 2130 "[pipe|queue] {zero|delete|show} [N{,N}]\n" 2131 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2132 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2133 "\n" 2134 "RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2135 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 2136 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 2137 "PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2138 "ADDR: [ MAC dst src ether_type ] \n" 2139 " [ from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2140 "IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2141 "IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2142 "OPTION_LIST: OPTION [OPTION_LIST]\n" 2143 "OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2144 " {dst-ip|src-ip} ADDR | {dst-port|src-port} LIST |\n" 2145 " estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2146 " iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2147 " ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2148 " mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2149 " setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2150 " tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2151 ); 2152 exit(0); 2153 } 2154 2155 2156 static int 2157 lookup_host (char *host, struct in_addr *ipaddr) 2158 { 2159 struct hostent *he; 2160 2161 if (!inet_aton(host, ipaddr)) { 2162 if ((he = gethostbyname(host)) == NULL) 2163 return(-1); 2164 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2165 } 2166 return(0); 2167 } 2168 2169 /* 2170 * fills the addr and mask fields in the instruction as appropriate from av. 2171 * Update length as appropriate. 2172 * The following formats are allowed: 2173 * any matches any IP. Actually returns an empty instruction. 2174 * me returns O_IP_*_ME 2175 * 1.2.3.4 single IP address 2176 * 1.2.3.4:5.6.7.8 address:mask 2177 * 1.2.3.4/24 address/mask 2178 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2179 * We can have multiple comma-separated address/mask entries. 2180 */ 2181 static void 2182 fill_ip(ipfw_insn_ip *cmd, char *av) 2183 { 2184 int len = 0; 2185 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2186 2187 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2188 2189 if (_substrcmp(av, "any") == 0) 2190 return; 2191 2192 if (_substrcmp(av, "me") == 0) { 2193 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2194 return; 2195 } 2196 2197 if (strncmp(av, "table(", 6) == 0) { 2198 char *p = strchr(av + 6, ','); 2199 2200 if (p) 2201 *p++ = '\0'; 2202 cmd->o.opcode = O_IP_DST_LOOKUP; 2203 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2204 if (p) { 2205 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2206 d[0] = strtoul(p, NULL, 0); 2207 } else 2208 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2209 return; 2210 } 2211 2212 while (av) { 2213 /* 2214 * After the address we can have '/' or ':' indicating a mask, 2215 * ',' indicating another address follows, '{' indicating a 2216 * set of addresses of unspecified size. 2217 */ 2218 char *p = strpbrk(av, "/:,{"); 2219 int masklen; 2220 char md; 2221 2222 if (p) { 2223 md = *p; 2224 *p++ = '\0'; 2225 } else 2226 md = '\0'; 2227 2228 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2229 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2230 switch (md) { 2231 case ':': 2232 if (!inet_aton(p, (struct in_addr *)&d[1])) 2233 errx(EX_DATAERR, "bad netmask ``%s''", p); 2234 break; 2235 case '/': 2236 masklen = atoi(p); 2237 if (masklen == 0) 2238 d[1] = htonl(0); /* mask */ 2239 else if (masklen > 32) 2240 errx(EX_DATAERR, "bad width ``%s''", p); 2241 else 2242 d[1] = htonl(~0 << (32 - masklen)); 2243 break; 2244 case '{': /* no mask, assume /24 and put back the '{' */ 2245 d[1] = htonl(~0 << (32 - 24)); 2246 *(--p) = md; 2247 break; 2248 2249 case ',': /* single address plus continuation */ 2250 *(--p) = md; 2251 /* FALLTHROUGH */ 2252 case 0: /* initialization value */ 2253 default: 2254 d[1] = htonl(~0); /* force /32 */ 2255 break; 2256 } 2257 d[0] &= d[1]; /* mask base address with mask */ 2258 /* find next separator */ 2259 if (p) 2260 p = strpbrk(p, ",{"); 2261 if (p && *p == '{') { 2262 /* 2263 * We have a set of addresses. They are stored as follows: 2264 * arg1 is the set size (powers of 2, 2..256) 2265 * addr is the base address IN HOST FORMAT 2266 * mask.. is an array of arg1 bits (rounded up to 2267 * the next multiple of 32) with bits set 2268 * for each host in the map. 2269 */ 2270 uint32_t *map = (uint32_t *)&cmd->mask; 2271 int low, high; 2272 int i = contigmask((uint8_t *)&(d[1]), 32); 2273 2274 if (len > 0) 2275 errx(EX_DATAERR, "address set cannot be in a list"); 2276 if (i < 24 || i > 31) 2277 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2278 cmd->o.arg1 = 1<<(32-i); /* map length */ 2279 d[0] = ntohl(d[0]); /* base addr in host format */ 2280 cmd->o.opcode = O_IP_DST_SET; /* default */ 2281 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2282 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2283 map[i] = 0; /* clear map */ 2284 2285 av = p + 1; 2286 low = d[0] & 0xff; 2287 high = low + cmd->o.arg1 - 1; 2288 /* 2289 * Here, i stores the previous value when we specify a range 2290 * of addresses within a mask, e.g. 45-63. i = -1 means we 2291 * have no previous value. 2292 */ 2293 i = -1; /* previous value in a range */ 2294 while (isdigit(*av)) { 2295 char *s; 2296 int a = strtol(av, &s, 0); 2297 2298 if (s == av) { /* no parameter */ 2299 if (*av != '}') 2300 errx(EX_DATAERR, "set not closed\n"); 2301 if (i != -1) 2302 errx(EX_DATAERR, "incomplete range %d-", i); 2303 break; 2304 } 2305 if (a < low || a > high) 2306 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2307 a, low, high); 2308 a -= low; 2309 if (i == -1) /* no previous in range */ 2310 i = a; 2311 else { /* check that range is valid */ 2312 if (i > a) 2313 errx(EX_DATAERR, "invalid range %d-%d", 2314 i+low, a+low); 2315 if (*s == '-') 2316 errx(EX_DATAERR, "double '-' in range"); 2317 } 2318 for (; i <= a; i++) 2319 map[i/32] |= 1<<(i & 31); 2320 i = -1; 2321 if (*s == '-') 2322 i = a; 2323 else if (*s == '}') 2324 break; 2325 av = s+1; 2326 } 2327 return; 2328 } 2329 av = p; 2330 if (av) /* then *av must be a ',' */ 2331 av++; 2332 2333 /* Check this entry */ 2334 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2335 /* 2336 * 'any' turns the entire list into a NOP. 2337 * 'not any' never matches, so it is removed from the 2338 * list unless it is the only item, in which case we 2339 * report an error. 2340 */ 2341 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2342 if (av == NULL && len == 0) /* only this entry */ 2343 errx(EX_DATAERR, "not any never matches"); 2344 } 2345 /* else do nothing and skip this entry */ 2346 return; 2347 } 2348 /* A single IP can be stored in an optimized format */ 2349 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2350 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2351 return; 2352 } 2353 len += 2; /* two words... */ 2354 d += 2; 2355 } /* end while */ 2356 cmd->o.len |= len+1; 2357 } 2358 2359 2360 /* 2361 * helper function to process a set of flags and set bits in the 2362 * appropriate masks. 2363 */ 2364 static void 2365 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2366 struct _s_x *flags, char *p) 2367 { 2368 uint8_t set=0, clear=0; 2369 2370 while (p && *p) { 2371 char *q; /* points to the separator */ 2372 int val; 2373 uint8_t *which; /* mask we are working on */ 2374 2375 if (*p == '!') { 2376 p++; 2377 which = &clear; 2378 } else 2379 which = &set; 2380 q = strchr(p, ','); 2381 if (q) 2382 *q++ = '\0'; 2383 val = match_token(flags, p); 2384 if (val <= 0) 2385 errx(EX_DATAERR, "invalid flag %s", p); 2386 *which |= (uint8_t)val; 2387 p = q; 2388 } 2389 cmd->opcode = opcode; 2390 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2391 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2392 } 2393 2394 2395 static void 2396 delete(int ac, char *av[]) 2397 { 2398 uint32_t rulenum; 2399 struct dn_pipe p; 2400 int i; 2401 int exitval = EX_OK; 2402 int do_set = 0; 2403 2404 memset(&p, 0, sizeof p); 2405 2406 av++; ac--; 2407 NEED1("missing rule specification"); 2408 if (ac > 0 && _substrcmp(*av, "set") == 0) { 2409 do_set = 1; /* delete set */ 2410 ac--; av++; 2411 } 2412 2413 /* Rule number */ 2414 while (ac && isdigit(**av)) { 2415 i = atoi(*av); av++; ac--; 2416 if (do_pipe) { 2417 if (do_pipe == 1) 2418 p.pipe_nr = i; 2419 else 2420 p.fs.fs_nr = i; 2421 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 2422 if (i) { 2423 exitval = 1; 2424 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2425 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 2426 } 2427 } else { 2428 rulenum = (i & 0xffff) | (do_set << 24); 2429 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 2430 if (i) { 2431 exitval = EX_UNAVAILABLE; 2432 warn("rule %u: setsockopt(IP_FW_DEL)", 2433 rulenum); 2434 } 2435 } 2436 } 2437 if (exitval != EX_OK) 2438 exit(exitval); 2439 } 2440 2441 2442 /* 2443 * fill the interface structure. We do not check the name as we can 2444 * create interfaces dynamically, so checking them at insert time 2445 * makes relatively little sense. 2446 * Interface names containing '*', '?', or '[' are assumed to be shell 2447 * patterns which match interfaces. 2448 */ 2449 static void 2450 fill_iface(ipfw_insn_if *cmd, char *arg) 2451 { 2452 cmd->name[0] = '\0'; 2453 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2454 2455 /* Parse the interface or address */ 2456 if (strcmp(arg, "any") == 0) 2457 cmd->o.len = 0; /* effectively ignore this command */ 2458 else if (!isdigit(*arg)) { 2459 strlcpy(cmd->name, arg, sizeof(cmd->name)); 2460 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 2461 } else if (!inet_aton(arg, &cmd->p.ip)) 2462 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2463 } 2464 2465 static void 2466 config_pipe(int ac, char **av) 2467 { 2468 struct dn_pipe p; 2469 int i; 2470 char *end; 2471 uint32_t a; 2472 void *par = NULL; 2473 2474 memset(&p, 0, sizeof p); 2475 2476 av++; ac--; 2477 /* Pipe number */ 2478 if (ac && isdigit(**av)) { 2479 i = atoi(*av); av++; ac--; 2480 if (do_pipe == 1) 2481 p.pipe_nr = i; 2482 else 2483 p.fs.fs_nr = i; 2484 } 2485 while (ac > 0) { 2486 double d; 2487 int tok = match_token(dummynet_params, *av); 2488 ac--; av++; 2489 2490 switch(tok) { 2491 case TOK_NOERROR: 2492 p.fs.flags_fs |= DN_NOERROR; 2493 break; 2494 2495 case TOK_PLR: 2496 NEED1("plr needs argument 0..1\n"); 2497 d = strtod(av[0], NULL); 2498 if (d > 1) 2499 d = 1; 2500 else if (d < 0) 2501 d = 0; 2502 p.fs.plr = (int)(d*0x7fffffff); 2503 ac--; av++; 2504 break; 2505 2506 case TOK_QUEUE: 2507 NEED1("queue needs queue size\n"); 2508 end = NULL; 2509 p.fs.qsize = strtoul(av[0], &end, 0); 2510 if (*end == 'K' || *end == 'k') { 2511 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2512 p.fs.qsize *= 1024; 2513 } else if (*end == 'B' || 2514 _substrcmp2(end, "by", "bytes") == 0) { 2515 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2516 } 2517 ac--; av++; 2518 break; 2519 2520 case TOK_BUCKETS: 2521 NEED1("buckets needs argument\n"); 2522 p.fs.rq_size = strtoul(av[0], NULL, 0); 2523 ac--; av++; 2524 break; 2525 2526 case TOK_MASK: 2527 NEED1("mask needs mask specifier\n"); 2528 /* 2529 * per-flow queue, mask is dst_ip, dst_port, 2530 * src_ip, src_port, proto measured in bits 2531 */ 2532 par = NULL; 2533 2534 p.fs.flow_mask.dst_ip = 0; 2535 p.fs.flow_mask.src_ip = 0; 2536 p.fs.flow_mask.dst_port = 0; 2537 p.fs.flow_mask.src_port = 0; 2538 p.fs.flow_mask.proto = 0; 2539 end = NULL; 2540 2541 while (ac >= 1) { 2542 uint32_t *p32 = NULL; 2543 uint16_t *p16 = NULL; 2544 2545 tok = match_token(dummynet_params, *av); 2546 ac--; av++; 2547 switch(tok) { 2548 case TOK_ALL: 2549 /* 2550 * special case, all bits significant 2551 */ 2552 p.fs.flow_mask.dst_ip = ~0; 2553 p.fs.flow_mask.src_ip = ~0; 2554 p.fs.flow_mask.dst_port = ~0; 2555 p.fs.flow_mask.src_port = ~0; 2556 p.fs.flow_mask.proto = ~0; 2557 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2558 goto end_mask; 2559 2560 case TOK_DSTIP: 2561 p32 = &p.fs.flow_mask.dst_ip; 2562 break; 2563 2564 case TOK_SRCIP: 2565 p32 = &p.fs.flow_mask.src_ip; 2566 break; 2567 2568 case TOK_DSTPORT: 2569 p16 = &p.fs.flow_mask.dst_port; 2570 break; 2571 2572 case TOK_SRCPORT: 2573 p16 = &p.fs.flow_mask.src_port; 2574 break; 2575 2576 case TOK_PROTO: 2577 break; 2578 2579 default: 2580 ac++; av--; /* backtrack */ 2581 goto end_mask; 2582 } 2583 if (ac < 1) 2584 errx(EX_USAGE, "mask: value missing"); 2585 if (*av[0] == '/') { 2586 a = strtoul(av[0]+1, &end, 0); 2587 a = (a == 32) ? ~0 : (1 << a) - 1; 2588 } else 2589 a = strtoul(av[0], &end, 0); 2590 if (p32 != NULL) 2591 *p32 = a; 2592 else if (p16 != NULL) { 2593 if (a > 0xFFFF) 2594 errx(EX_DATAERR, 2595 "mask: must be 16 bit"); 2596 *p16 = (uint16_t)a; 2597 } else { 2598 if (a > 0xFF) 2599 errx(EX_DATAERR, 2600 "mask: must be 8 bit"); 2601 p.fs.flow_mask.proto = (uint8_t)a; 2602 } 2603 if (a != 0) 2604 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2605 ac--; av++; 2606 } /* end while, config masks */ 2607 end_mask: 2608 break; 2609 2610 case TOK_RED: 2611 case TOK_GRED: 2612 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2613 p.fs.flags_fs |= DN_IS_RED; 2614 if (tok == TOK_GRED) 2615 p.fs.flags_fs |= DN_IS_GENTLE_RED; 2616 /* 2617 * the format for parameters is w_q/min_th/max_th/max_p 2618 */ 2619 if ((end = strsep(&av[0], "/"))) { 2620 double w_q = strtod(end, NULL); 2621 if (w_q > 1 || w_q <= 0) 2622 errx(EX_DATAERR, "0 < w_q <= 1"); 2623 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2624 } 2625 if ((end = strsep(&av[0], "/"))) { 2626 p.fs.min_th = strtoul(end, &end, 0); 2627 if (*end == 'K' || *end == 'k') 2628 p.fs.min_th *= 1024; 2629 } 2630 if ((end = strsep(&av[0], "/"))) { 2631 p.fs.max_th = strtoul(end, &end, 0); 2632 if (*end == 'K' || *end == 'k') 2633 p.fs.max_th *= 1024; 2634 } 2635 if ((end = strsep(&av[0], "/"))) { 2636 double max_p = strtod(end, NULL); 2637 if (max_p > 1 || max_p <= 0) 2638 errx(EX_DATAERR, "0 < max_p <= 1"); 2639 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2640 } 2641 ac--; av++; 2642 break; 2643 2644 case TOK_DROPTAIL: 2645 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2646 break; 2647 2648 case TOK_BW: 2649 NEED1("bw needs bandwidth or interface\n"); 2650 if (do_pipe != 1) 2651 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2652 /* 2653 * set clocking interface or bandwidth value 2654 */ 2655 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 2656 int l = sizeof(p.if_name)-1; 2657 /* interface name */ 2658 strncpy(p.if_name, av[0], l); 2659 p.if_name[l] = '\0'; 2660 p.bandwidth = 0; 2661 } else { 2662 p.if_name[0] = '\0'; 2663 p.bandwidth = strtoul(av[0], &end, 0); 2664 if (*end == 'K' || *end == 'k') { 2665 end++; 2666 p.bandwidth *= 1000; 2667 } else if (*end == 'M') { 2668 end++; 2669 p.bandwidth *= 1000000; 2670 } 2671 if (*end == 'B' || 2672 _substrcmp2(end, "by", "bytes") == 0) 2673 p.bandwidth *= 8; 2674 if (p.bandwidth < 0) 2675 errx(EX_DATAERR, "bandwidth too large"); 2676 } 2677 ac--; av++; 2678 break; 2679 2680 case TOK_DELAY: 2681 if (do_pipe != 1) 2682 errx(EX_DATAERR, "delay only valid for pipes"); 2683 NEED1("delay needs argument 0..10000ms\n"); 2684 p.delay = strtoul(av[0], NULL, 0); 2685 ac--; av++; 2686 break; 2687 2688 case TOK_WEIGHT: 2689 if (do_pipe == 1) 2690 errx(EX_DATAERR,"weight only valid for queues"); 2691 NEED1("weight needs argument 0..100\n"); 2692 p.fs.weight = strtoul(av[0], &end, 0); 2693 ac--; av++; 2694 break; 2695 2696 case TOK_PIPE: 2697 if (do_pipe == 1) 2698 errx(EX_DATAERR,"pipe only valid for queues"); 2699 NEED1("pipe needs pipe_number\n"); 2700 p.fs.parent_nr = strtoul(av[0], &end, 0); 2701 ac--; av++; 2702 break; 2703 2704 default: 2705 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 2706 } 2707 } 2708 if (do_pipe == 1) { 2709 if (p.pipe_nr == 0) 2710 errx(EX_DATAERR, "pipe_nr must be > 0"); 2711 if (p.delay > 10000) 2712 errx(EX_DATAERR, "delay must be < 10000"); 2713 } else { /* do_pipe == 2, queue */ 2714 if (p.fs.parent_nr == 0) 2715 errx(EX_DATAERR, "pipe must be > 0"); 2716 if (p.fs.weight >100) 2717 errx(EX_DATAERR, "weight must be <= 100"); 2718 } 2719 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2720 if (p.fs.qsize > 1024*1024) 2721 errx(EX_DATAERR, "queue size must be < 1MB"); 2722 } else { 2723 if (p.fs.qsize > 100) 2724 errx(EX_DATAERR, "2 <= queue size <= 100"); 2725 } 2726 if (p.fs.flags_fs & DN_IS_RED) { 2727 size_t len; 2728 int lookup_depth, avg_pkt_size; 2729 double s, idle, weight, w_q; 2730 struct clockinfo ck; 2731 int t; 2732 2733 if (p.fs.min_th >= p.fs.max_th) 2734 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2735 p.fs.min_th, p.fs.max_th); 2736 if (p.fs.max_th == 0) 2737 errx(EX_DATAERR, "max_th must be > 0"); 2738 2739 len = sizeof(int); 2740 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2741 &lookup_depth, &len, NULL, 0) == -1) 2742 2743 errx(1, "sysctlbyname(\"%s\")", 2744 "net.inet.ip.dummynet.red_lookup_depth"); 2745 if (lookup_depth == 0) 2746 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2747 " must be greater than zero"); 2748 2749 len = sizeof(int); 2750 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2751 &avg_pkt_size, &len, NULL, 0) == -1) 2752 2753 errx(1, "sysctlbyname(\"%s\")", 2754 "net.inet.ip.dummynet.red_avg_pkt_size"); 2755 if (avg_pkt_size == 0) 2756 errx(EX_DATAERR, 2757 "net.inet.ip.dummynet.red_avg_pkt_size must" 2758 " be greater than zero"); 2759 2760 len = sizeof(struct clockinfo); 2761 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 2762 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 2763 2764 /* 2765 * Ticks needed for sending a medium-sized packet. 2766 * Unfortunately, when we are configuring a WF2Q+ queue, we 2767 * do not have bandwidth information, because that is stored 2768 * in the parent pipe, and also we have multiple queues 2769 * competing for it. So we set s=0, which is not very 2770 * correct. But on the other hand, why do we want RED with 2771 * WF2Q+ ? 2772 */ 2773 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 2774 s = 0; 2775 else 2776 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 2777 2778 /* 2779 * max idle time (in ticks) before avg queue size becomes 0. 2780 * NOTA: (3/w_q) is approx the value x so that 2781 * (1-w_q)^x < 10^-3. 2782 */ 2783 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 2784 idle = s * 3. / w_q; 2785 p.fs.lookup_step = (int)idle / lookup_depth; 2786 if (!p.fs.lookup_step) 2787 p.fs.lookup_step = 1; 2788 weight = 1 - w_q; 2789 for (t = p.fs.lookup_step; t > 0; --t) 2790 weight *= weight; 2791 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2792 } 2793 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 2794 if (i) 2795 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2796 } 2797 2798 static void 2799 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 2800 { 2801 int i, l; 2802 2803 for (i=0; i<6; i++) 2804 addr[i] = mask[i] = 0; 2805 if (strcmp(p, "any") == 0) 2806 return; 2807 2808 for (i=0; *p && i<6;i++, p++) { 2809 addr[i] = strtol(p, &p, 16); 2810 if (*p != ':') /* we start with the mask */ 2811 break; 2812 } 2813 if (*p == '/') { /* mask len */ 2814 l = strtol(p+1, &p, 0); 2815 for (i=0; l>0; l -=8, i++) 2816 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2817 } else if (*p == '&') { /* mask */ 2818 for (i=0, p++; *p && i<6;i++, p++) { 2819 mask[i] = strtol(p, &p, 16); 2820 if (*p != ':') 2821 break; 2822 } 2823 } else if (*p == '\0') { 2824 for (i=0; i<6; i++) 2825 mask[i] = 0xff; 2826 } 2827 for (i=0; i<6; i++) 2828 addr[i] &= mask[i]; 2829 } 2830 2831 /* 2832 * helper function, updates the pointer to cmd with the length 2833 * of the current command, and also cleans up the first word of 2834 * the new command in case it has been clobbered before. 2835 */ 2836 static ipfw_insn * 2837 next_cmd(ipfw_insn *cmd) 2838 { 2839 cmd += F_LEN(cmd); 2840 bzero(cmd, sizeof(*cmd)); 2841 return cmd; 2842 } 2843 2844 /* 2845 * Takes arguments and copies them into a comment 2846 */ 2847 static void 2848 fill_comment(ipfw_insn *cmd, int ac, char **av) 2849 { 2850 int i, l; 2851 char *p = (char *)(cmd + 1); 2852 2853 cmd->opcode = O_NOP; 2854 cmd->len = (cmd->len & (F_NOT | F_OR)); 2855 2856 /* Compute length of comment string. */ 2857 for (i = 0, l = 0; i < ac; i++) 2858 l += strlen(av[i]) + 1; 2859 if (l == 0) 2860 return; 2861 if (l > 84) 2862 errx(EX_DATAERR, 2863 "comment too long (max 80 chars)"); 2864 l = 1 + (l+3)/4; 2865 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 2866 for (i = 0; i < ac; i++) { 2867 strcpy(p, av[i]); 2868 p += strlen(av[i]); 2869 *p++ = ' '; 2870 } 2871 *(--p) = '\0'; 2872 } 2873 2874 /* 2875 * A function to fill simple commands of size 1. 2876 * Existing flags are preserved. 2877 */ 2878 static void 2879 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 2880 { 2881 cmd->opcode = opcode; 2882 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2883 cmd->arg1 = arg; 2884 } 2885 2886 /* 2887 * Fetch and add the MAC address and type, with masks. This generates one or 2888 * two microinstructions, and returns the pointer to the last one. 2889 */ 2890 static ipfw_insn * 2891 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2892 { 2893 ipfw_insn_mac *mac; 2894 2895 if (ac < 2) 2896 errx(EX_DATAERR, "MAC dst src"); 2897 2898 cmd->opcode = O_MACADDR2; 2899 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2900 2901 mac = (ipfw_insn_mac *)cmd; 2902 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2903 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2904 return cmd; 2905 } 2906 2907 static ipfw_insn * 2908 add_mactype(ipfw_insn *cmd, int ac, char *av) 2909 { 2910 if (ac < 1) 2911 errx(EX_DATAERR, "missing MAC type"); 2912 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2913 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2914 cmd->opcode = O_MAC_TYPE; 2915 return cmd; 2916 } else 2917 return NULL; 2918 } 2919 2920 static ipfw_insn * 2921 add_proto(ipfw_insn *cmd, char *av) 2922 { 2923 struct protoent *pe; 2924 u_char proto = 0; 2925 2926 if (_substrcmp(av, "all") == 0) 2927 ; /* same as "ip" */ 2928 else if ((proto = atoi(av)) > 0) 2929 ; /* all done! */ 2930 else if ((pe = getprotobyname(av)) != NULL) 2931 proto = pe->p_proto; 2932 else 2933 return NULL; 2934 if (proto != IPPROTO_IP) 2935 fill_cmd(cmd, O_PROTO, 0, proto); 2936 return cmd; 2937 } 2938 2939 static ipfw_insn * 2940 add_srcip(ipfw_insn *cmd, char *av) 2941 { 2942 fill_ip((ipfw_insn_ip *)cmd, av); 2943 if (cmd->opcode == O_IP_DST_SET) /* set */ 2944 cmd->opcode = O_IP_SRC_SET; 2945 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 2946 cmd->opcode = O_IP_SRC_LOOKUP; 2947 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2948 cmd->opcode = O_IP_SRC_ME; 2949 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2950 cmd->opcode = O_IP_SRC; 2951 else /* addr/mask */ 2952 cmd->opcode = O_IP_SRC_MASK; 2953 return cmd; 2954 } 2955 2956 static ipfw_insn * 2957 add_dstip(ipfw_insn *cmd, char *av) 2958 { 2959 fill_ip((ipfw_insn_ip *)cmd, av); 2960 if (cmd->opcode == O_IP_DST_SET) /* set */ 2961 ; 2962 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 2963 ; 2964 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2965 cmd->opcode = O_IP_DST_ME; 2966 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2967 cmd->opcode = O_IP_DST; 2968 else /* addr/mask */ 2969 cmd->opcode = O_IP_DST_MASK; 2970 return cmd; 2971 } 2972 2973 static ipfw_insn * 2974 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2975 { 2976 if (_substrcmp(av, "any") == 0) { 2977 return NULL; 2978 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2979 /* XXX todo: check that we have a protocol with ports */ 2980 cmd->opcode = opcode; 2981 return cmd; 2982 } 2983 return NULL; 2984 } 2985 2986 /* 2987 * Parse arguments and assemble the microinstructions which make up a rule. 2988 * Rules are added into the 'rulebuf' and then copied in the correct order 2989 * into the actual rule. 2990 * 2991 * The syntax for a rule starts with the action, followed by 2992 * optional action parameters, and the various match patterns. 2993 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 2994 * (generated if the rule includes a keep-state option), then the 2995 * various match patterns, log/altq actions, and the actual action. 2996 * 2997 */ 2998 static void 2999 add(int ac, char *av[]) 3000 { 3001 /* 3002 * rules are added into the 'rulebuf' and then copied in 3003 * the correct order into the actual rule. 3004 * Some things that need to go out of order (prob, action etc.) 3005 * go into actbuf[]. 3006 */ 3007 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3008 3009 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3010 ipfw_insn *first_cmd; /* first match pattern */ 3011 3012 struct ip_fw *rule; 3013 3014 /* 3015 * various flags used to record that we entered some fields. 3016 */ 3017 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3018 ipfw_insn *have_log = NULL, *have_altq = NULL; 3019 size_t len; 3020 3021 int i; 3022 3023 int open_par = 0; /* open parenthesis ( */ 3024 3025 /* proto is here because it is used to fetch ports */ 3026 u_char proto = IPPROTO_IP; /* default protocol */ 3027 3028 double match_prob = 1; /* match probability, default is always match */ 3029 3030 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3031 bzero(cmdbuf, sizeof(cmdbuf)); 3032 bzero(rulebuf, sizeof(rulebuf)); 3033 3034 rule = (struct ip_fw *)rulebuf; 3035 cmd = (ipfw_insn *)cmdbuf; 3036 action = (ipfw_insn *)actbuf; 3037 3038 av++; ac--; 3039 3040 /* [rule N] -- Rule number optional */ 3041 if (ac && isdigit(**av)) { 3042 rule->rulenum = atoi(*av); 3043 av++; 3044 ac--; 3045 } 3046 3047 /* [set N] -- set number (0..RESVD_SET), optional */ 3048 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3049 int set = strtoul(av[1], NULL, 10); 3050 if (set < 0 || set > RESVD_SET) 3051 errx(EX_DATAERR, "illegal set %s", av[1]); 3052 rule->set = set; 3053 av += 2; ac -= 2; 3054 } 3055 3056 /* [prob D] -- match probability, optional */ 3057 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3058 match_prob = strtod(av[1], NULL); 3059 3060 if (match_prob <= 0 || match_prob > 1) 3061 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3062 av += 2; ac -= 2; 3063 } 3064 3065 /* action -- mandatory */ 3066 NEED1("missing action"); 3067 i = match_token(rule_actions, *av); 3068 ac--; av++; 3069 action->len = 1; /* default */ 3070 switch(i) { 3071 case TOK_CHECKSTATE: 3072 have_state = action; 3073 action->opcode = O_CHECK_STATE; 3074 break; 3075 3076 case TOK_ACCEPT: 3077 action->opcode = O_ACCEPT; 3078 break; 3079 3080 case TOK_DENY: 3081 action->opcode = O_DENY; 3082 action->arg1 = 0; 3083 break; 3084 3085 case TOK_REJECT: 3086 action->opcode = O_REJECT; 3087 action->arg1 = ICMP_UNREACH_HOST; 3088 break; 3089 3090 case TOK_RESET: 3091 action->opcode = O_REJECT; 3092 action->arg1 = ICMP_REJECT_RST; 3093 break; 3094 3095 case TOK_UNREACH: 3096 action->opcode = O_REJECT; 3097 NEED1("missing reject code"); 3098 fill_reject_code(&action->arg1, *av); 3099 ac--; av++; 3100 break; 3101 3102 case TOK_COUNT: 3103 action->opcode = O_COUNT; 3104 break; 3105 3106 case TOK_QUEUE: 3107 case TOK_PIPE: 3108 action->len = F_INSN_SIZE(ipfw_insn_pipe); 3109 case TOK_SKIPTO: 3110 if (i == TOK_QUEUE) 3111 action->opcode = O_QUEUE; 3112 else if (i == TOK_PIPE) 3113 action->opcode = O_PIPE; 3114 else if (i == TOK_SKIPTO) 3115 action->opcode = O_SKIPTO; 3116 NEED1("missing skipto/pipe/queue number"); 3117 action->arg1 = strtoul(*av, NULL, 10); 3118 av++; ac--; 3119 break; 3120 3121 case TOK_DIVERT: 3122 case TOK_TEE: 3123 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 3124 NEED1("missing divert/tee port"); 3125 action->arg1 = strtoul(*av, NULL, 0); 3126 if (action->arg1 == 0) { 3127 struct servent *s; 3128 setservent(1); 3129 s = getservbyname(av[0], "divert"); 3130 if (s != NULL) 3131 action->arg1 = ntohs(s->s_port); 3132 else 3133 errx(EX_DATAERR, "illegal divert/tee port"); 3134 } 3135 ac--; av++; 3136 break; 3137 3138 case TOK_NETGRAPH: 3139 case TOK_NGTEE: 3140 action->opcode = (i == TOK_NETGRAPH ) ? O_NETGRAPH : O_NGTEE; 3141 NEED1("missing netgraph cookie"); 3142 action->arg1 = strtoul(*av, NULL, 0); 3143 if (action->arg1 == 0) 3144 errx(EX_DATAERR, "illegal netgraph cookie"); 3145 ac--; av++; 3146 break; 3147 3148 case TOK_FORWARD: { 3149 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3150 char *s, *end; 3151 3152 NEED1("missing forward address[:port]"); 3153 3154 action->opcode = O_FORWARD_IP; 3155 action->len = F_INSN_SIZE(ipfw_insn_sa); 3156 3157 p->sa.sin_len = sizeof(struct sockaddr_in); 3158 p->sa.sin_family = AF_INET; 3159 p->sa.sin_port = 0; 3160 /* 3161 * locate the address-port separator (':' or ',') 3162 */ 3163 s = strchr(*av, ':'); 3164 if (s == NULL) 3165 s = strchr(*av, ','); 3166 if (s != NULL) { 3167 *(s++) = '\0'; 3168 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3169 if (s == end) 3170 errx(EX_DATAERR, 3171 "illegal forwarding port ``%s''", s); 3172 p->sa.sin_port = (u_short)i; 3173 } 3174 lookup_host(*av, &(p->sa.sin_addr)); 3175 } 3176 ac--; av++; 3177 break; 3178 3179 case TOK_COMMENT: 3180 /* pretend it is a 'count' rule followed by the comment */ 3181 action->opcode = O_COUNT; 3182 ac++; av--; /* go back... */ 3183 break; 3184 3185 default: 3186 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 3187 } 3188 action = next_cmd(action); 3189 3190 /* 3191 * [altq queuename] -- altq tag, optional 3192 * [log [logamount N]] -- log, optional 3193 * 3194 * If they exist, it go first in the cmdbuf, but then it is 3195 * skipped in the copy section to the end of the buffer. 3196 */ 3197 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 3198 ac--; av++; 3199 switch (i) { 3200 case TOK_LOG: 3201 { 3202 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 3203 int l; 3204 3205 if (have_log) 3206 errx(EX_DATAERR, 3207 "log cannot be specified more than once"); 3208 have_log = (ipfw_insn *)c; 3209 cmd->len = F_INSN_SIZE(ipfw_insn_log); 3210 cmd->opcode = O_LOG; 3211 if (ac && _substrcmp(*av, "logamount") == 0) { 3212 ac--; av++; 3213 NEED1("logamount requires argument"); 3214 l = atoi(*av); 3215 if (l < 0) 3216 errx(EX_DATAERR, 3217 "logamount must be positive"); 3218 c->max_log = l; 3219 ac--; av++; 3220 } else { 3221 len = sizeof(c->max_log); 3222 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 3223 &c->max_log, &len, NULL, 0) == -1) 3224 errx(1, "sysctlbyname(\"%s\")", 3225 "net.inet.ip.fw.verbose_limit"); 3226 } 3227 } 3228 break; 3229 3230 case TOK_ALTQ: 3231 { 3232 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 3233 3234 NEED1("missing altq queue name"); 3235 if (have_altq) 3236 errx(EX_DATAERR, 3237 "altq cannot be specified more than once"); 3238 have_altq = (ipfw_insn *)a; 3239 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 3240 cmd->opcode = O_ALTQ; 3241 fill_altq_qid(&a->qid, *av); 3242 ac--; av++; 3243 } 3244 break; 3245 3246 default: 3247 abort(); 3248 } 3249 cmd = next_cmd(cmd); 3250 } 3251 3252 if (have_state) /* must be a check-state, we are done */ 3253 goto done; 3254 3255 #define OR_START(target) \ 3256 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 3257 if (open_par) \ 3258 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 3259 prev = NULL; \ 3260 open_par = 1; \ 3261 if ( (av[0])[1] == '\0') { \ 3262 ac--; av++; \ 3263 } else \ 3264 (*av)++; \ 3265 } \ 3266 target: \ 3267 3268 3269 #define CLOSE_PAR \ 3270 if (open_par) { \ 3271 if (ac && ( \ 3272 strcmp(*av, ")") == 0 || \ 3273 strcmp(*av, "}") == 0)) { \ 3274 prev = NULL; \ 3275 open_par = 0; \ 3276 ac--; av++; \ 3277 } else \ 3278 errx(EX_USAGE, "missing \")\"\n"); \ 3279 } 3280 3281 #define NOT_BLOCK \ 3282 if (ac && _substrcmp(*av, "not") == 0) { \ 3283 if (cmd->len & F_NOT) \ 3284 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 3285 cmd->len |= F_NOT; \ 3286 ac--; av++; \ 3287 } 3288 3289 #define OR_BLOCK(target) \ 3290 if (ac && _substrcmp(*av, "or") == 0) { \ 3291 if (prev == NULL || open_par == 0) \ 3292 errx(EX_DATAERR, "invalid OR block"); \ 3293 prev->len |= F_OR; \ 3294 ac--; av++; \ 3295 goto target; \ 3296 } \ 3297 CLOSE_PAR; 3298 3299 first_cmd = cmd; 3300 3301 #if 0 3302 /* 3303 * MAC addresses, optional. 3304 * If we have this, we skip the part "proto from src to dst" 3305 * and jump straight to the option parsing. 3306 */ 3307 NOT_BLOCK; 3308 NEED1("missing protocol"); 3309 if (_substrcmp(*av, "MAC") == 0 || 3310 _substrcmp(*av, "mac") == 0) { 3311 ac--; av++; /* the "MAC" keyword */ 3312 add_mac(cmd, ac, av); /* exits in case of errors */ 3313 cmd = next_cmd(cmd); 3314 ac -= 2; av += 2; /* dst-mac and src-mac */ 3315 NOT_BLOCK; 3316 NEED1("missing mac type"); 3317 if (add_mactype(cmd, ac, av[0])) 3318 cmd = next_cmd(cmd); 3319 ac--; av++; /* any or mac-type */ 3320 goto read_options; 3321 } 3322 #endif 3323 3324 /* 3325 * protocol, mandatory 3326 */ 3327 OR_START(get_proto); 3328 NOT_BLOCK; 3329 NEED1("missing protocol"); 3330 if (add_proto(cmd, *av)) { 3331 av++; ac--; 3332 if (F_LEN(cmd) == 0) /* plain IP */ 3333 proto = 0; 3334 else { 3335 proto = cmd->arg1; 3336 prev = cmd; 3337 cmd = next_cmd(cmd); 3338 } 3339 } else if (first_cmd != cmd) { 3340 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3341 } else 3342 goto read_options; 3343 OR_BLOCK(get_proto); 3344 3345 /* 3346 * "from", mandatory 3347 */ 3348 if (!ac || _substrcmp(*av, "from") != 0) 3349 errx(EX_USAGE, "missing ``from''"); 3350 ac--; av++; 3351 3352 /* 3353 * source IP, mandatory 3354 */ 3355 OR_START(source_ip); 3356 NOT_BLOCK; /* optional "not" */ 3357 NEED1("missing source address"); 3358 if (add_srcip(cmd, *av)) { 3359 ac--; av++; 3360 if (F_LEN(cmd) != 0) { /* ! any */ 3361 prev = cmd; 3362 cmd = next_cmd(cmd); 3363 } 3364 } 3365 OR_BLOCK(source_ip); 3366 3367 /* 3368 * source ports, optional 3369 */ 3370 NOT_BLOCK; /* optional "not" */ 3371 if (ac) { 3372 if (_substrcmp(*av, "any") == 0 || 3373 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3374 ac--; av++; 3375 if (F_LEN(cmd) != 0) 3376 cmd = next_cmd(cmd); 3377 } 3378 } 3379 3380 /* 3381 * "to", mandatory 3382 */ 3383 if (!ac || _substrcmp(*av, "to") != 0) 3384 errx(EX_USAGE, "missing ``to''"); 3385 av++; ac--; 3386 3387 /* 3388 * destination, mandatory 3389 */ 3390 OR_START(dest_ip); 3391 NOT_BLOCK; /* optional "not" */ 3392 NEED1("missing dst address"); 3393 if (add_dstip(cmd, *av)) { 3394 ac--; av++; 3395 if (F_LEN(cmd) != 0) { /* ! any */ 3396 prev = cmd; 3397 cmd = next_cmd(cmd); 3398 } 3399 } 3400 OR_BLOCK(dest_ip); 3401 3402 /* 3403 * dest. ports, optional 3404 */ 3405 NOT_BLOCK; /* optional "not" */ 3406 if (ac) { 3407 if (_substrcmp(*av, "any") == 0 || 3408 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3409 ac--; av++; 3410 if (F_LEN(cmd) != 0) 3411 cmd = next_cmd(cmd); 3412 } 3413 } 3414 3415 read_options: 3416 if (ac && first_cmd == cmd) { 3417 /* 3418 * nothing specified so far, store in the rule to ease 3419 * printout later. 3420 */ 3421 rule->_pad = 1; 3422 } 3423 prev = NULL; 3424 while (ac) { 3425 char *s; 3426 ipfw_insn_u32 *cmd32; /* alias for cmd */ 3427 3428 s = *av; 3429 cmd32 = (ipfw_insn_u32 *)cmd; 3430 3431 if (*s == '!') { /* alternate syntax for NOT */ 3432 if (cmd->len & F_NOT) 3433 errx(EX_USAGE, "double \"not\" not allowed\n"); 3434 cmd->len = F_NOT; 3435 s++; 3436 } 3437 i = match_token(rule_options, s); 3438 ac--; av++; 3439 switch(i) { 3440 case TOK_NOT: 3441 if (cmd->len & F_NOT) 3442 errx(EX_USAGE, "double \"not\" not allowed\n"); 3443 cmd->len = F_NOT; 3444 break; 3445 3446 case TOK_OR: 3447 if (open_par == 0 || prev == NULL) 3448 errx(EX_USAGE, "invalid \"or\" block\n"); 3449 prev->len |= F_OR; 3450 break; 3451 3452 case TOK_STARTBRACE: 3453 if (open_par) 3454 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 3455 open_par = 1; 3456 break; 3457 3458 case TOK_ENDBRACE: 3459 if (!open_par) 3460 errx(EX_USAGE, "+missing \")\"\n"); 3461 open_par = 0; 3462 prev = NULL; 3463 break; 3464 3465 case TOK_IN: 3466 fill_cmd(cmd, O_IN, 0, 0); 3467 break; 3468 3469 case TOK_OUT: 3470 cmd->len ^= F_NOT; /* toggle F_NOT */ 3471 fill_cmd(cmd, O_IN, 0, 0); 3472 break; 3473 3474 case TOK_DIVERTED: 3475 fill_cmd(cmd, O_DIVERTED, 0, 3); 3476 break; 3477 3478 case TOK_DIVERTEDLOOPBACK: 3479 fill_cmd(cmd, O_DIVERTED, 0, 1); 3480 break; 3481 3482 case TOK_DIVERTEDOUTPUT: 3483 fill_cmd(cmd, O_DIVERTED, 0, 2); 3484 break; 3485 3486 case TOK_FRAG: 3487 fill_cmd(cmd, O_FRAG, 0, 0); 3488 break; 3489 3490 case TOK_LAYER2: 3491 fill_cmd(cmd, O_LAYER2, 0, 0); 3492 break; 3493 3494 case TOK_XMIT: 3495 case TOK_RECV: 3496 case TOK_VIA: 3497 NEED1("recv, xmit, via require interface name" 3498 " or address"); 3499 fill_iface((ipfw_insn_if *)cmd, av[0]); 3500 ac--; av++; 3501 if (F_LEN(cmd) == 0) /* not a valid address */ 3502 break; 3503 if (i == TOK_XMIT) 3504 cmd->opcode = O_XMIT; 3505 else if (i == TOK_RECV) 3506 cmd->opcode = O_RECV; 3507 else if (i == TOK_VIA) 3508 cmd->opcode = O_VIA; 3509 break; 3510 3511 case TOK_ICMPTYPES: 3512 NEED1("icmptypes requires list of types"); 3513 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 3514 av++; ac--; 3515 break; 3516 3517 case TOK_IPTTL: 3518 NEED1("ipttl requires TTL"); 3519 if (strpbrk(*av, "-,")) { 3520 if (!add_ports(cmd, *av, 0, O_IPTTL)) 3521 errx(EX_DATAERR, "invalid ipttl %s", *av); 3522 } else 3523 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3524 ac--; av++; 3525 break; 3526 3527 case TOK_IPID: 3528 NEED1("ipid requires id"); 3529 if (strpbrk(*av, "-,")) { 3530 if (!add_ports(cmd, *av, 0, O_IPID)) 3531 errx(EX_DATAERR, "invalid ipid %s", *av); 3532 } else 3533 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3534 ac--; av++; 3535 break; 3536 3537 case TOK_IPLEN: 3538 NEED1("iplen requires length"); 3539 if (strpbrk(*av, "-,")) { 3540 if (!add_ports(cmd, *av, 0, O_IPLEN)) 3541 errx(EX_DATAERR, "invalid ip len %s", *av); 3542 } else 3543 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3544 ac--; av++; 3545 break; 3546 3547 case TOK_IPVER: 3548 NEED1("ipver requires version"); 3549 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3550 ac--; av++; 3551 break; 3552 3553 case TOK_IPPRECEDENCE: 3554 NEED1("ipprecedence requires value"); 3555 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3556 (strtoul(*av, NULL, 0) & 7) << 5); 3557 ac--; av++; 3558 break; 3559 3560 case TOK_IPOPTS: 3561 NEED1("missing argument for ipoptions"); 3562 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3563 ac--; av++; 3564 break; 3565 3566 case TOK_IPTOS: 3567 NEED1("missing argument for iptos"); 3568 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3569 ac--; av++; 3570 break; 3571 3572 case TOK_UID: 3573 NEED1("uid requires argument"); 3574 { 3575 char *end; 3576 uid_t uid; 3577 struct passwd *pwd; 3578 3579 cmd->opcode = O_UID; 3580 uid = strtoul(*av, &end, 0); 3581 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3582 if (pwd == NULL) 3583 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3584 cmd32->d[0] = pwd->pw_uid; 3585 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3586 ac--; av++; 3587 } 3588 break; 3589 3590 case TOK_GID: 3591 NEED1("gid requires argument"); 3592 { 3593 char *end; 3594 gid_t gid; 3595 struct group *grp; 3596 3597 cmd->opcode = O_GID; 3598 gid = strtoul(*av, &end, 0); 3599 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3600 if (grp == NULL) 3601 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3602 cmd32->d[0] = grp->gr_gid; 3603 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3604 ac--; av++; 3605 } 3606 break; 3607 3608 case TOK_JAIL: 3609 NEED1("jail requires argument"); 3610 { 3611 char *end; 3612 int jid; 3613 3614 cmd->opcode = O_JAIL; 3615 jid = (int)strtol(*av, &end, 0); 3616 if (jid < 0 || *end != '\0') 3617 errx(EX_DATAERR, "jail requires prison ID"); 3618 cmd32->d[0] = (uint32_t)jid; 3619 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3620 ac--; av++; 3621 } 3622 break; 3623 3624 case TOK_ESTAB: 3625 fill_cmd(cmd, O_ESTAB, 0, 0); 3626 break; 3627 3628 case TOK_SETUP: 3629 fill_cmd(cmd, O_TCPFLAGS, 0, 3630 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3631 break; 3632 3633 case TOK_TCPDATALEN: 3634 NEED1("tcpdatalen requires length"); 3635 if (strpbrk(*av, "-,")) { 3636 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 3637 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 3638 } else 3639 fill_cmd(cmd, O_TCPDATALEN, 0, 3640 strtoul(*av, NULL, 0)); 3641 ac--; av++; 3642 break; 3643 3644 case TOK_TCPOPTS: 3645 NEED1("missing argument for tcpoptions"); 3646 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3647 ac--; av++; 3648 break; 3649 3650 case TOK_TCPSEQ: 3651 case TOK_TCPACK: 3652 NEED1("tcpseq/tcpack requires argument"); 3653 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3654 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3655 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3656 ac--; av++; 3657 break; 3658 3659 case TOK_TCPWIN: 3660 NEED1("tcpwin requires length"); 3661 fill_cmd(cmd, O_TCPWIN, 0, 3662 htons(strtoul(*av, NULL, 0))); 3663 ac--; av++; 3664 break; 3665 3666 case TOK_TCPFLAGS: 3667 NEED1("missing argument for tcpflags"); 3668 cmd->opcode = O_TCPFLAGS; 3669 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3670 ac--; av++; 3671 break; 3672 3673 case TOK_KEEPSTATE: 3674 if (open_par) 3675 errx(EX_USAGE, "keep-state cannot be part " 3676 "of an or block"); 3677 if (have_state) 3678 errx(EX_USAGE, "only one of keep-state " 3679 "and limit is allowed"); 3680 have_state = cmd; 3681 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3682 break; 3683 3684 case TOK_LIMIT: 3685 if (open_par) 3686 errx(EX_USAGE, "limit cannot be part " 3687 "of an or block"); 3688 if (have_state) 3689 errx(EX_USAGE, "only one of keep-state " 3690 "and limit is allowed"); 3691 NEED1("limit needs mask and # of connections"); 3692 have_state = cmd; 3693 { 3694 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3695 3696 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3697 cmd->opcode = O_LIMIT; 3698 c->limit_mask = 0; 3699 c->conn_limit = 0; 3700 for (; ac >1 ;) { 3701 int val; 3702 3703 val = match_token(limit_masks, *av); 3704 if (val <= 0) 3705 break; 3706 c->limit_mask |= val; 3707 ac--; av++; 3708 } 3709 c->conn_limit = atoi(*av); 3710 if (c->conn_limit == 0) 3711 errx(EX_USAGE, "limit: limit must be >0"); 3712 if (c->limit_mask == 0) 3713 errx(EX_USAGE, "missing limit mask"); 3714 ac--; av++; 3715 } 3716 break; 3717 3718 case TOK_PROTO: 3719 NEED1("missing protocol"); 3720 if (add_proto(cmd, *av)) { 3721 proto = cmd->arg1; 3722 ac--; av++; 3723 } else 3724 errx(EX_DATAERR, "invalid protocol ``%s''", 3725 *av); 3726 break; 3727 3728 case TOK_SRCIP: 3729 NEED1("missing source IP"); 3730 if (add_srcip(cmd, *av)) { 3731 ac--; av++; 3732 } 3733 break; 3734 3735 case TOK_DSTIP: 3736 NEED1("missing destination IP"); 3737 if (add_dstip(cmd, *av)) { 3738 ac--; av++; 3739 } 3740 break; 3741 3742 case TOK_SRCPORT: 3743 NEED1("missing source port"); 3744 if (_substrcmp(*av, "any") == 0 || 3745 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3746 ac--; av++; 3747 } else 3748 errx(EX_DATAERR, "invalid source port %s", *av); 3749 break; 3750 3751 case TOK_DSTPORT: 3752 NEED1("missing destination port"); 3753 if (_substrcmp(*av, "any") == 0 || 3754 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3755 ac--; av++; 3756 } else 3757 errx(EX_DATAERR, "invalid destination port %s", 3758 *av); 3759 break; 3760 3761 case TOK_MAC: 3762 if (add_mac(cmd, ac, av)) { 3763 ac -= 2; av += 2; 3764 } 3765 break; 3766 3767 case TOK_MACTYPE: 3768 NEED1("missing mac type"); 3769 if (!add_mactype(cmd, ac, *av)) 3770 errx(EX_DATAERR, "invalid mac type %s", *av); 3771 ac--; av++; 3772 break; 3773 3774 case TOK_VERREVPATH: 3775 fill_cmd(cmd, O_VERREVPATH, 0, 0); 3776 break; 3777 3778 case TOK_VERSRCREACH: 3779 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 3780 break; 3781 3782 case TOK_ANTISPOOF: 3783 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 3784 break; 3785 3786 case TOK_IPSEC: 3787 fill_cmd(cmd, O_IPSEC, 0, 0); 3788 break; 3789 3790 case TOK_COMMENT: 3791 fill_comment(cmd, ac, av); 3792 av += ac; 3793 ac = 0; 3794 break; 3795 3796 default: 3797 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3798 } 3799 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3800 prev = cmd; 3801 cmd = next_cmd(cmd); 3802 } 3803 } 3804 3805 done: 3806 /* 3807 * Now copy stuff into the rule. 3808 * If we have a keep-state option, the first instruction 3809 * must be a PROBE_STATE (which is generated here). 3810 * If we have a LOG option, it was stored as the first command, 3811 * and now must be moved to the top of the action part. 3812 */ 3813 dst = (ipfw_insn *)rule->cmd; 3814 3815 /* 3816 * First thing to write into the command stream is the match probability. 3817 */ 3818 if (match_prob != 1) { /* 1 means always match */ 3819 dst->opcode = O_PROB; 3820 dst->len = 2; 3821 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3822 dst += dst->len; 3823 } 3824 3825 /* 3826 * generate O_PROBE_STATE if necessary 3827 */ 3828 if (have_state && have_state->opcode != O_CHECK_STATE) { 3829 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3830 dst = next_cmd(dst); 3831 } 3832 /* 3833 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ 3834 */ 3835 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3836 i = F_LEN(src); 3837 3838 switch (src->opcode) { 3839 case O_LOG: 3840 case O_KEEP_STATE: 3841 case O_LIMIT: 3842 case O_ALTQ: 3843 break; 3844 default: 3845 bcopy(src, dst, i * sizeof(uint32_t)); 3846 dst += i; 3847 } 3848 } 3849 3850 /* 3851 * put back the have_state command as last opcode 3852 */ 3853 if (have_state && have_state->opcode != O_CHECK_STATE) { 3854 i = F_LEN(have_state); 3855 bcopy(have_state, dst, i * sizeof(uint32_t)); 3856 dst += i; 3857 } 3858 /* 3859 * start action section 3860 */ 3861 rule->act_ofs = dst - rule->cmd; 3862 3863 /* 3864 * put back O_LOG, O_ALTQ if necessary 3865 */ 3866 if (have_log) { 3867 i = F_LEN(have_log); 3868 bcopy(have_log, dst, i * sizeof(uint32_t)); 3869 dst += i; 3870 } 3871 if (have_altq) { 3872 i = F_LEN(have_altq); 3873 bcopy(have_altq, dst, i * sizeof(uint32_t)); 3874 dst += i; 3875 } 3876 /* 3877 * copy all other actions 3878 */ 3879 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3880 i = F_LEN(src); 3881 bcopy(src, dst, i * sizeof(uint32_t)); 3882 dst += i; 3883 } 3884 3885 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 3886 i = (char *)dst - (char *)rule; 3887 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 3888 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3889 if (!do_quiet) 3890 show_ipfw(rule, 0, 0); 3891 } 3892 3893 static void 3894 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 3895 { 3896 int rulenum; 3897 int failed = EX_OK; 3898 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 3899 3900 av++; ac--; 3901 3902 if (!ac) { 3903 /* clear all entries */ 3904 if (do_cmd(optname, NULL, 0) < 0) 3905 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 3906 if (!do_quiet) 3907 printf("%s.\n", optname == IP_FW_ZERO ? 3908 "Accounting cleared":"Logging counts reset"); 3909 3910 return; 3911 } 3912 3913 while (ac) { 3914 /* Rule number */ 3915 if (isdigit(**av)) { 3916 rulenum = atoi(*av); 3917 av++; 3918 ac--; 3919 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 3920 warn("rule %u: setsockopt(IP_FW_%s)", 3921 rulenum, name); 3922 failed = EX_UNAVAILABLE; 3923 } else if (!do_quiet) 3924 printf("Entry %d %s.\n", rulenum, 3925 optname == IP_FW_ZERO ? 3926 "cleared" : "logging count reset"); 3927 } else { 3928 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3929 } 3930 } 3931 if (failed != EX_OK) 3932 exit(failed); 3933 } 3934 3935 static void 3936 flush(int force) 3937 { 3938 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3939 3940 if (!force && !do_quiet) { /* need to ask user */ 3941 int c; 3942 3943 printf("Are you sure? [yn] "); 3944 fflush(stdout); 3945 do { 3946 c = toupper(getc(stdin)); 3947 while (c != '\n' && getc(stdin) != '\n') 3948 if (feof(stdin)) 3949 return; /* and do not flush */ 3950 } while (c != 'Y' && c != 'N'); 3951 printf("\n"); 3952 if (c == 'N') /* user said no */ 3953 return; 3954 } 3955 if (do_cmd(cmd, NULL, 0) < 0) 3956 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3957 do_pipe ? "DUMMYNET" : "FW"); 3958 if (!do_quiet) 3959 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3960 } 3961 3962 /* 3963 * Free a the (locally allocated) copy of command line arguments. 3964 */ 3965 static void 3966 free_args(int ac, char **av) 3967 { 3968 int i; 3969 3970 for (i=0; i < ac; i++) 3971 free(av[i]); 3972 free(av); 3973 } 3974 3975 /* 3976 * This one handles all table-related commands 3977 * ipfw table N add addr[/masklen] [value] 3978 * ipfw table N delete addr[/masklen] 3979 * ipfw table N flush 3980 * ipfw table N list 3981 */ 3982 static void 3983 table_handler(int ac, char *av[]) 3984 { 3985 ipfw_table_entry ent; 3986 ipfw_table *tbl; 3987 int do_add; 3988 char *p; 3989 socklen_t l; 3990 uint32_t a; 3991 3992 ac--; av++; 3993 if (ac && isdigit(**av)) { 3994 ent.tbl = atoi(*av); 3995 ac--; av++; 3996 } else 3997 errx(EX_USAGE, "table number required"); 3998 NEED1("table needs command"); 3999 if (_substrcmp(*av, "add") == 0 || 4000 _substrcmp(*av, "delete") == 0) { 4001 do_add = **av == 'a'; 4002 ac--; av++; 4003 if (!ac) 4004 errx(EX_USAGE, "IP address required"); 4005 p = strchr(*av, '/'); 4006 if (p) { 4007 *p++ = '\0'; 4008 ent.masklen = atoi(p); 4009 if (ent.masklen > 32) 4010 errx(EX_DATAERR, "bad width ``%s''", p); 4011 } else 4012 ent.masklen = 32; 4013 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 4014 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4015 ac--; av++; 4016 if (do_add && ac) 4017 ent.value = strtoul(*av, NULL, 0); 4018 else 4019 ent.value = 0; 4020 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 4021 &ent, sizeof(ent)) < 0) 4022 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 4023 do_add ? "ADD" : "DEL"); 4024 } else if (_substrcmp(*av, "flush") == 0) { 4025 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4026 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4027 } else if (_substrcmp(*av, "list") == 0) { 4028 a = ent.tbl; 4029 l = sizeof(a); 4030 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4031 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4032 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4033 tbl = malloc(l); 4034 if (tbl == NULL) 4035 err(EX_OSERR, "malloc"); 4036 tbl->tbl = ent.tbl; 4037 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 4038 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 4039 for (a = 0; a < tbl->cnt; a++) { 4040 printf("%s/%u %u\n", 4041 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 4042 tbl->ent[a].masklen, tbl->ent[a].value); 4043 } 4044 } else 4045 errx(EX_USAGE, "invalid table command %s", *av); 4046 } 4047 4048 /* 4049 * Called with the arguments (excluding program name). 4050 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 4051 */ 4052 static int 4053 ipfw_main(int oldac, char **oldav) 4054 { 4055 int ch, ac, save_ac; 4056 char **av, **save_av; 4057 int do_acct = 0; /* Show packet/byte count */ 4058 4059 #define WHITESP " \t\f\v\n\r" 4060 if (oldac == 0) 4061 return 1; 4062 else if (oldac == 1) { 4063 /* 4064 * If we are called with a single string, try to split it into 4065 * arguments for subsequent parsing. 4066 * But first, remove spaces after a ',', by copying the string 4067 * in-place. 4068 */ 4069 char *arg = oldav[0]; /* The string... */ 4070 int l = strlen(arg); 4071 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 4072 int i, j; 4073 for (i = j = 0; i < l; i++) { 4074 if (arg[i] == '#') /* comment marker */ 4075 break; 4076 if (copy) { 4077 arg[j++] = arg[i]; 4078 copy = !index("," WHITESP, arg[i]); 4079 } else { 4080 copy = !index(WHITESP, arg[i]); 4081 if (copy) 4082 arg[j++] = arg[i]; 4083 } 4084 } 4085 if (!copy && j > 0) /* last char was a 'blank', remove it */ 4086 j--; 4087 l = j; /* the new argument length */ 4088 arg[j++] = '\0'; 4089 if (l == 0) /* empty string! */ 4090 return 1; 4091 4092 /* 4093 * First, count number of arguments. Because of the previous 4094 * processing, this is just the number of blanks plus 1. 4095 */ 4096 for (i = 0, ac = 1; i < l; i++) 4097 if (index(WHITESP, arg[i]) != NULL) 4098 ac++; 4099 4100 av = calloc(ac, sizeof(char *)); 4101 4102 /* 4103 * Second, copy arguments from cmd[] to av[]. For each one, 4104 * j is the initial character, i is the one past the end. 4105 */ 4106 for (ac = 0, i = j = 0; i < l; i++) 4107 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 4108 if (i == l-1) 4109 i++; 4110 av[ac] = calloc(i-j+1, 1); 4111 bcopy(arg+j, av[ac], i-j); 4112 ac++; 4113 j = i + 1; 4114 } 4115 } else { 4116 /* 4117 * If an argument ends with ',' join with the next one. 4118 */ 4119 int first, i, l; 4120 4121 av = calloc(oldac, sizeof(char *)); 4122 for (first = i = ac = 0, l = 0; i < oldac; i++) { 4123 char *arg = oldav[i]; 4124 int k = strlen(arg); 4125 4126 l += k; 4127 if (arg[k-1] != ',' || i == oldac-1) { 4128 /* Time to copy. */ 4129 av[ac] = calloc(l+1, 1); 4130 for (l=0; first <= i; first++) { 4131 strcat(av[ac]+l, oldav[first]); 4132 l += strlen(oldav[first]); 4133 } 4134 ac++; 4135 l = 0; 4136 first = i+1; 4137 } 4138 } 4139 } 4140 4141 /* Set the force flag for non-interactive processes */ 4142 if (!do_force) 4143 do_force = !isatty(STDIN_FILENO); 4144 4145 /* Save arguments for final freeing of memory. */ 4146 save_ac = ac; 4147 save_av = av; 4148 4149 optind = optreset = 0; 4150 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 4151 switch (ch) { 4152 case 'a': 4153 do_acct = 1; 4154 break; 4155 4156 case 'b': 4157 comment_only = 1; 4158 do_compact = 1; 4159 break; 4160 4161 case 'c': 4162 do_compact = 1; 4163 break; 4164 4165 case 'd': 4166 do_dynamic = 1; 4167 break; 4168 4169 case 'e': 4170 do_expired = 1; 4171 break; 4172 4173 case 'f': 4174 do_force = 1; 4175 break; 4176 4177 case 'h': /* help */ 4178 free_args(save_ac, save_av); 4179 help(); 4180 break; /* NOTREACHED */ 4181 4182 case 'n': 4183 test_only = 1; 4184 break; 4185 4186 case 'N': 4187 do_resolv = 1; 4188 break; 4189 4190 case 'q': 4191 do_quiet = 1; 4192 break; 4193 4194 case 's': /* sort */ 4195 do_sort = atoi(optarg); 4196 break; 4197 4198 case 'S': 4199 show_sets = 1; 4200 break; 4201 4202 case 't': 4203 do_time = 1; 4204 break; 4205 4206 case 'T': 4207 do_time = 2; /* numeric timestamp */ 4208 break; 4209 4210 case 'v': /* verbose */ 4211 verbose = 1; 4212 break; 4213 4214 default: 4215 free_args(save_ac, save_av); 4216 return 1; 4217 } 4218 4219 ac -= optind; 4220 av += optind; 4221 NEED1("bad arguments, for usage summary ``ipfw''"); 4222 4223 /* 4224 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 4225 * e.g. "100 add allow ..." instead of "add 100 allow ...". 4226 * In case, swap first and second argument to get the normal form. 4227 */ 4228 if (ac > 1 && isdigit(*av[0])) { 4229 char *p = av[0]; 4230 4231 av[0] = av[1]; 4232 av[1] = p; 4233 } 4234 4235 /* 4236 * optional: pipe or queue 4237 */ 4238 do_pipe = 0; 4239 if (_substrcmp(*av, "pipe") == 0) 4240 do_pipe = 1; 4241 else if (_substrcmp(*av, "queue") == 0) 4242 do_pipe = 2; 4243 if (do_pipe) { 4244 ac--; 4245 av++; 4246 } 4247 NEED1("missing command"); 4248 4249 /* 4250 * For pipes and queues we normally say 'pipe NN config' 4251 * but the code is easier to parse as 'pipe config NN' 4252 * so we swap the two arguments. 4253 */ 4254 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 4255 char *p = av[0]; 4256 4257 av[0] = av[1]; 4258 av[1] = p; 4259 } 4260 4261 if (_substrcmp(*av, "add") == 0) 4262 add(ac, av); 4263 else if (do_pipe && _substrcmp(*av, "config") == 0) 4264 config_pipe(ac, av); 4265 else if (_substrcmp(*av, "delete") == 0) 4266 delete(ac, av); 4267 else if (_substrcmp(*av, "flush") == 0) 4268 flush(do_force); 4269 else if (_substrcmp(*av, "zero") == 0) 4270 zero(ac, av, IP_FW_ZERO); 4271 else if (_substrcmp(*av, "resetlog") == 0) 4272 zero(ac, av, IP_FW_RESETLOG); 4273 else if (_substrcmp(*av, "print") == 0 || 4274 _substrcmp(*av, "list") == 0) 4275 list(ac, av, do_acct); 4276 else if (_substrcmp(*av, "set") == 0) 4277 sets_handler(ac, av); 4278 else if (_substrcmp(*av, "table") == 0) 4279 table_handler(ac, av); 4280 else if (_substrcmp(*av, "enable") == 0) 4281 sysctl_handler(ac, av, 1); 4282 else if (_substrcmp(*av, "disable") == 0) 4283 sysctl_handler(ac, av, 0); 4284 else if (_substrcmp(*av, "show") == 0) 4285 list(ac, av, 1 /* show counters */); 4286 else 4287 errx(EX_USAGE, "bad command `%s'", *av); 4288 4289 /* Free memory allocated in the argument parsing. */ 4290 free_args(save_ac, save_av); 4291 return 0; 4292 } 4293 4294 4295 static void 4296 ipfw_readfile(int ac, char *av[]) 4297 { 4298 #define MAX_ARGS 32 4299 char buf[BUFSIZ]; 4300 char *cmd = NULL, *filename = av[ac-1]; 4301 int c, lineno=0; 4302 FILE *f = NULL; 4303 pid_t preproc = 0; 4304 4305 filename = av[ac-1]; 4306 4307 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 4308 switch(c) { 4309 case 'c': 4310 do_compact = 1; 4311 break; 4312 4313 case 'f': 4314 do_force = 1; 4315 break; 4316 4317 case 'N': 4318 do_resolv = 1; 4319 break; 4320 4321 case 'n': 4322 test_only = 1; 4323 break; 4324 4325 case 'p': 4326 cmd = optarg; 4327 /* 4328 * Skip previous args and delete last one, so we 4329 * pass all but the last argument to the preprocessor 4330 * via av[optind-1] 4331 */ 4332 av += optind - 1; 4333 ac -= optind - 1; 4334 av[ac-1] = NULL; 4335 fprintf(stderr, "command is %s\n", av[0]); 4336 break; 4337 4338 case 'q': 4339 do_quiet = 1; 4340 break; 4341 4342 case 'S': 4343 show_sets = 1; 4344 break; 4345 4346 default: 4347 errx(EX_USAGE, "bad arguments, for usage" 4348 " summary ``ipfw''"); 4349 } 4350 4351 if (cmd != NULL) 4352 break; 4353 } 4354 4355 if (cmd == NULL && ac != optind + 1) { 4356 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 4357 errx(EX_USAGE, "extraneous filename arguments"); 4358 } 4359 4360 if ((f = fopen(filename, "r")) == NULL) 4361 err(EX_UNAVAILABLE, "fopen: %s", filename); 4362 4363 if (cmd != NULL) { /* pipe through preprocessor */ 4364 int pipedes[2]; 4365 4366 if (pipe(pipedes) == -1) 4367 err(EX_OSERR, "cannot create pipe"); 4368 4369 preproc = fork(); 4370 if (preproc == -1) 4371 err(EX_OSERR, "cannot fork"); 4372 4373 if (preproc == 0) { 4374 /* 4375 * Child, will run the preprocessor with the 4376 * file on stdin and the pipe on stdout. 4377 */ 4378 if (dup2(fileno(f), 0) == -1 4379 || dup2(pipedes[1], 1) == -1) 4380 err(EX_OSERR, "dup2()"); 4381 fclose(f); 4382 close(pipedes[1]); 4383 close(pipedes[0]); 4384 execvp(cmd, av); 4385 err(EX_OSERR, "execvp(%s) failed", cmd); 4386 } else { /* parent, will reopen f as the pipe */ 4387 fclose(f); 4388 close(pipedes[1]); 4389 if ((f = fdopen(pipedes[0], "r")) == NULL) { 4390 int savederrno = errno; 4391 4392 (void)kill(preproc, SIGTERM); 4393 errno = savederrno; 4394 err(EX_OSERR, "fdopen()"); 4395 } 4396 } 4397 } 4398 4399 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 4400 char linename[10]; 4401 char *args[1]; 4402 4403 lineno++; 4404 sprintf(linename, "Line %d", lineno); 4405 setprogname(linename); /* XXX */ 4406 args[0] = buf; 4407 ipfw_main(1, args); 4408 } 4409 fclose(f); 4410 if (cmd != NULL) { 4411 int status; 4412 4413 if (waitpid(preproc, &status, 0) == -1) 4414 errx(EX_OSERR, "waitpid()"); 4415 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 4416 errx(EX_UNAVAILABLE, 4417 "preprocessor exited with status %d", 4418 WEXITSTATUS(status)); 4419 else if (WIFSIGNALED(status)) 4420 errx(EX_UNAVAILABLE, 4421 "preprocessor exited with signal %d", 4422 WTERMSIG(status)); 4423 } 4424 } 4425 4426 int 4427 main(int ac, char *av[]) 4428 { 4429 /* 4430 * If the last argument is an absolute pathname, interpret it 4431 * as a file to be preprocessed. 4432 */ 4433 4434 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 4435 ipfw_readfile(ac, av); 4436 else { 4437 if (ipfw_main(ac-1, av+1)) 4438 show_usage(); 4439 } 4440 return EX_OK; 4441 } 4442