1 /* 2 * Copyright (c) 2002-2003 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD$ 21 */ 22 23 #include <sys/param.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 #include <sys/time.h> 29 #include <sys/wait.h> 30 #include <sys/queue.h> 31 32 #include <ctype.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <grp.h> 36 #include <limits.h> 37 #include <netdb.h> 38 #include <pwd.h> 39 #include <signal.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <timeconv.h> /* XXX do we need this ? */ 45 #include <unistd.h> 46 #include <sysexits.h> 47 #include <unistd.h> 48 #include <fcntl.h> 49 50 #include <net/if.h> 51 #include <net/pfvar.h> 52 #include <net/route.h> /* def. of struct route */ 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/ip_icmp.h> 57 #include <netinet/icmp6.h> 58 #include <netinet/ip_fw.h> 59 #include <netinet/ip_dummynet.h> 60 #include <netinet/tcp.h> 61 #include <arpa/inet.h> 62 63 int 64 do_resolv, /* Would try to resolve all */ 65 do_time, /* Show time stamps */ 66 do_quiet, /* Be quiet in add and flush */ 67 do_pipe, /* this cmd refers to a pipe */ 68 do_sort, /* field to sort results (0 = no) */ 69 do_dynamic, /* display dynamic rules */ 70 do_expired, /* display expired dynamic rules */ 71 do_compact, /* show rules in compact mode */ 72 do_force, /* do not ask for confirmation */ 73 show_sets, /* display rule sets */ 74 test_only, /* only check syntax */ 75 comment_only, /* only print action and comment */ 76 verbose; 77 78 #define IP_MASK_ALL 0xffffffff 79 /* 80 * the following macro returns an error message if we run out of 81 * arguments. 82 */ 83 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 84 85 /* 86 * _s_x is a structure that stores a string <-> token pairs, used in 87 * various places in the parser. Entries are stored in arrays, 88 * with an entry with s=NULL as terminator. 89 * The search routines are match_token() and match_value(). 90 * Often, an element with x=0 contains an error string. 91 * 92 */ 93 struct _s_x { 94 char const *s; 95 int x; 96 }; 97 98 static struct _s_x f_tcpflags[] = { 99 { "syn", TH_SYN }, 100 { "fin", TH_FIN }, 101 { "ack", TH_ACK }, 102 { "psh", TH_PUSH }, 103 { "rst", TH_RST }, 104 { "urg", TH_URG }, 105 { "tcp flag", 0 }, 106 { NULL, 0 } 107 }; 108 109 static struct _s_x f_tcpopts[] = { 110 { "mss", IP_FW_TCPOPT_MSS }, 111 { "maxseg", IP_FW_TCPOPT_MSS }, 112 { "window", IP_FW_TCPOPT_WINDOW }, 113 { "sack", IP_FW_TCPOPT_SACK }, 114 { "ts", IP_FW_TCPOPT_TS }, 115 { "timestamp", IP_FW_TCPOPT_TS }, 116 { "cc", IP_FW_TCPOPT_CC }, 117 { "tcp option", 0 }, 118 { NULL, 0 } 119 }; 120 121 /* 122 * IP options span the range 0 to 255 so we need to remap them 123 * (though in fact only the low 5 bits are significant). 124 */ 125 static struct _s_x f_ipopts[] = { 126 { "ssrr", IP_FW_IPOPT_SSRR}, 127 { "lsrr", IP_FW_IPOPT_LSRR}, 128 { "rr", IP_FW_IPOPT_RR}, 129 { "ts", IP_FW_IPOPT_TS}, 130 { "ip option", 0 }, 131 { NULL, 0 } 132 }; 133 134 static struct _s_x f_iptos[] = { 135 { "lowdelay", IPTOS_LOWDELAY}, 136 { "throughput", IPTOS_THROUGHPUT}, 137 { "reliability", IPTOS_RELIABILITY}, 138 { "mincost", IPTOS_MINCOST}, 139 { "congestion", IPTOS_CE}, 140 { "ecntransport", IPTOS_ECT}, 141 { "ip tos option", 0}, 142 { NULL, 0 } 143 }; 144 145 static struct _s_x limit_masks[] = { 146 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 147 {"src-addr", DYN_SRC_ADDR}, 148 {"src-port", DYN_SRC_PORT}, 149 {"dst-addr", DYN_DST_ADDR}, 150 {"dst-port", DYN_DST_PORT}, 151 {NULL, 0} 152 }; 153 154 /* 155 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 156 * This is only used in this code. 157 */ 158 #define IPPROTO_ETHERTYPE 0x1000 159 static struct _s_x ether_types[] = { 160 /* 161 * Note, we cannot use "-:&/" in the names because they are field 162 * separators in the type specifications. Also, we use s = NULL as 163 * end-delimiter, because a type of 0 can be legal. 164 */ 165 { "ip", 0x0800 }, 166 { "ipv4", 0x0800 }, 167 { "ipv6", 0x86dd }, 168 { "arp", 0x0806 }, 169 { "rarp", 0x8035 }, 170 { "vlan", 0x8100 }, 171 { "loop", 0x9000 }, 172 { "trail", 0x1000 }, 173 { "at", 0x809b }, 174 { "atalk", 0x809b }, 175 { "aarp", 0x80f3 }, 176 { "pppoe_disc", 0x8863 }, 177 { "pppoe_sess", 0x8864 }, 178 { "ipx_8022", 0x00E0 }, 179 { "ipx_8023", 0x0000 }, 180 { "ipx_ii", 0x8137 }, 181 { "ipx_snap", 0x8137 }, 182 { "ipx", 0x8137 }, 183 { "ns", 0x0600 }, 184 { NULL, 0 } 185 }; 186 187 static void show_usage(void); 188 189 enum tokens { 190 TOK_NULL=0, 191 192 TOK_OR, 193 TOK_NOT, 194 TOK_STARTBRACE, 195 TOK_ENDBRACE, 196 197 TOK_ACCEPT, 198 TOK_COUNT, 199 TOK_PIPE, 200 TOK_QUEUE, 201 TOK_DIVERT, 202 TOK_TEE, 203 TOK_NETGRAPH, 204 TOK_NGTEE, 205 TOK_FORWARD, 206 TOK_SKIPTO, 207 TOK_DENY, 208 TOK_REJECT, 209 TOK_RESET, 210 TOK_UNREACH, 211 TOK_CHECKSTATE, 212 213 TOK_ALTQ, 214 TOK_LOG, 215 216 TOK_UID, 217 TOK_GID, 218 TOK_JAIL, 219 TOK_IN, 220 TOK_LIMIT, 221 TOK_KEEPSTATE, 222 TOK_LAYER2, 223 TOK_OUT, 224 TOK_DIVERTED, 225 TOK_DIVERTEDLOOPBACK, 226 TOK_DIVERTEDOUTPUT, 227 TOK_XMIT, 228 TOK_RECV, 229 TOK_VIA, 230 TOK_FRAG, 231 TOK_IPOPTS, 232 TOK_IPLEN, 233 TOK_IPID, 234 TOK_IPPRECEDENCE, 235 TOK_IPTOS, 236 TOK_IPTTL, 237 TOK_IPVER, 238 TOK_ESTAB, 239 TOK_SETUP, 240 TOK_TCPDATALEN, 241 TOK_TCPFLAGS, 242 TOK_TCPOPTS, 243 TOK_TCPSEQ, 244 TOK_TCPACK, 245 TOK_TCPWIN, 246 TOK_ICMPTYPES, 247 TOK_MAC, 248 TOK_MACTYPE, 249 TOK_VERREVPATH, 250 TOK_VERSRCREACH, 251 TOK_ANTISPOOF, 252 TOK_IPSEC, 253 TOK_COMMENT, 254 255 TOK_PLR, 256 TOK_NOERROR, 257 TOK_BUCKETS, 258 TOK_DSTIP, 259 TOK_SRCIP, 260 TOK_DSTPORT, 261 TOK_SRCPORT, 262 TOK_ALL, 263 TOK_MASK, 264 TOK_BW, 265 TOK_DELAY, 266 TOK_RED, 267 TOK_GRED, 268 TOK_DROPTAIL, 269 TOK_PROTO, 270 TOK_WEIGHT, 271 272 TOK_IPV6, 273 TOK_FLOWID, 274 TOK_ICMP6TYPES, 275 TOK_EXT6HDR, 276 TOK_DSTIP6, 277 TOK_SRCIP6, 278 279 TOK_IPV4, 280 }; 281 282 struct _s_x dummynet_params[] = { 283 { "plr", TOK_PLR }, 284 { "noerror", TOK_NOERROR }, 285 { "buckets", TOK_BUCKETS }, 286 { "dst-ip", TOK_DSTIP }, 287 { "src-ip", TOK_SRCIP }, 288 { "dst-port", TOK_DSTPORT }, 289 { "src-port", TOK_SRCPORT }, 290 { "proto", TOK_PROTO }, 291 { "weight", TOK_WEIGHT }, 292 { "all", TOK_ALL }, 293 { "mask", TOK_MASK }, 294 { "droptail", TOK_DROPTAIL }, 295 { "red", TOK_RED }, 296 { "gred", TOK_GRED }, 297 { "bw", TOK_BW }, 298 { "bandwidth", TOK_BW }, 299 { "delay", TOK_DELAY }, 300 { "pipe", TOK_PIPE }, 301 { "queue", TOK_QUEUE }, 302 { "flow-id", TOK_FLOWID}, 303 { "dst-ipv6", TOK_DSTIP6}, 304 { "dst-ip6", TOK_DSTIP6}, 305 { "src-ipv6", TOK_SRCIP6}, 306 { "src-ip6", TOK_SRCIP6}, 307 { "dummynet-params", TOK_NULL }, 308 { NULL, 0 } /* terminator */ 309 }; 310 311 struct _s_x rule_actions[] = { 312 { "accept", TOK_ACCEPT }, 313 { "pass", TOK_ACCEPT }, 314 { "allow", TOK_ACCEPT }, 315 { "permit", TOK_ACCEPT }, 316 { "count", TOK_COUNT }, 317 { "pipe", TOK_PIPE }, 318 { "queue", TOK_QUEUE }, 319 { "divert", TOK_DIVERT }, 320 { "tee", TOK_TEE }, 321 { "netgraph", TOK_NETGRAPH }, 322 { "ngtee", TOK_NGTEE }, 323 { "fwd", TOK_FORWARD }, 324 { "forward", TOK_FORWARD }, 325 { "skipto", TOK_SKIPTO }, 326 { "deny", TOK_DENY }, 327 { "drop", TOK_DENY }, 328 { "reject", TOK_REJECT }, 329 { "reset", TOK_RESET }, 330 { "unreach", TOK_UNREACH }, 331 { "check-state", TOK_CHECKSTATE }, 332 { "//", TOK_COMMENT }, 333 { NULL, 0 } /* terminator */ 334 }; 335 336 struct _s_x rule_action_params[] = { 337 { "altq", TOK_ALTQ }, 338 { "log", TOK_LOG }, 339 { NULL, 0 } /* terminator */ 340 }; 341 342 struct _s_x rule_options[] = { 343 { "uid", TOK_UID }, 344 { "gid", TOK_GID }, 345 { "jail", TOK_JAIL }, 346 { "in", TOK_IN }, 347 { "limit", TOK_LIMIT }, 348 { "keep-state", TOK_KEEPSTATE }, 349 { "bridged", TOK_LAYER2 }, 350 { "layer2", TOK_LAYER2 }, 351 { "out", TOK_OUT }, 352 { "diverted", TOK_DIVERTED }, 353 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 354 { "diverted-output", TOK_DIVERTEDOUTPUT }, 355 { "xmit", TOK_XMIT }, 356 { "recv", TOK_RECV }, 357 { "via", TOK_VIA }, 358 { "fragment", TOK_FRAG }, 359 { "frag", TOK_FRAG }, 360 { "ipoptions", TOK_IPOPTS }, 361 { "ipopts", TOK_IPOPTS }, 362 { "iplen", TOK_IPLEN }, 363 { "ipid", TOK_IPID }, 364 { "ipprecedence", TOK_IPPRECEDENCE }, 365 { "iptos", TOK_IPTOS }, 366 { "ipttl", TOK_IPTTL }, 367 { "ipversion", TOK_IPVER }, 368 { "ipver", TOK_IPVER }, 369 { "estab", TOK_ESTAB }, 370 { "established", TOK_ESTAB }, 371 { "setup", TOK_SETUP }, 372 { "tcpdatalen", TOK_TCPDATALEN }, 373 { "tcpflags", TOK_TCPFLAGS }, 374 { "tcpflgs", TOK_TCPFLAGS }, 375 { "tcpoptions", TOK_TCPOPTS }, 376 { "tcpopts", TOK_TCPOPTS }, 377 { "tcpseq", TOK_TCPSEQ }, 378 { "tcpack", TOK_TCPACK }, 379 { "tcpwin", TOK_TCPWIN }, 380 { "icmptype", TOK_ICMPTYPES }, 381 { "icmptypes", TOK_ICMPTYPES }, 382 { "dst-ip", TOK_DSTIP }, 383 { "src-ip", TOK_SRCIP }, 384 { "dst-port", TOK_DSTPORT }, 385 { "src-port", TOK_SRCPORT }, 386 { "proto", TOK_PROTO }, 387 { "MAC", TOK_MAC }, 388 { "mac", TOK_MAC }, 389 { "mac-type", TOK_MACTYPE }, 390 { "verrevpath", TOK_VERREVPATH }, 391 { "versrcreach", TOK_VERSRCREACH }, 392 { "antispoof", TOK_ANTISPOOF }, 393 { "ipsec", TOK_IPSEC }, 394 { "icmp6type", TOK_ICMP6TYPES }, 395 { "icmp6types", TOK_ICMP6TYPES }, 396 { "ext6hdr", TOK_EXT6HDR}, 397 { "flow-id", TOK_FLOWID}, 398 { "ipv6", TOK_IPV6}, 399 { "ip6", TOK_IPV6}, 400 { "ipv4", TOK_IPV4}, 401 { "ip4", TOK_IPV4}, 402 { "dst-ipv6", TOK_DSTIP6}, 403 { "dst-ip6", TOK_DSTIP6}, 404 { "src-ipv6", TOK_SRCIP6}, 405 { "src-ip6", TOK_SRCIP6}, 406 { "//", TOK_COMMENT }, 407 408 { "not", TOK_NOT }, /* pseudo option */ 409 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 410 { "or", TOK_OR }, /* pseudo option */ 411 { "|", /* escape */ TOK_OR }, /* pseudo option */ 412 { "{", TOK_STARTBRACE }, /* pseudo option */ 413 { "(", TOK_STARTBRACE }, /* pseudo option */ 414 { "}", TOK_ENDBRACE }, /* pseudo option */ 415 { ")", TOK_ENDBRACE }, /* pseudo option */ 416 { NULL, 0 } /* terminator */ 417 }; 418 419 static __inline uint64_t 420 align_uint64(uint64_t *pll) { 421 uint64_t ret; 422 423 bcopy (pll, &ret, sizeof(ret)); 424 return ret; 425 } 426 427 /* 428 * conditionally runs the command. 429 */ 430 static int 431 do_cmd(int optname, void *optval, uintptr_t optlen) 432 { 433 static int s = -1; /* the socket */ 434 int i; 435 436 if (test_only) 437 return 0; 438 439 if (s == -1) 440 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 441 if (s < 0) 442 err(EX_UNAVAILABLE, "socket"); 443 444 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 445 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 446 optname == IP_FW_TABLE_GETSIZE) 447 i = getsockopt(s, IPPROTO_IP, optname, optval, 448 (socklen_t *)optlen); 449 else 450 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 451 return i; 452 } 453 454 /** 455 * match_token takes a table and a string, returns the value associated 456 * with the string (-1 in case of failure). 457 */ 458 static int 459 match_token(struct _s_x *table, char *string) 460 { 461 struct _s_x *pt; 462 uint i = strlen(string); 463 464 for (pt = table ; i && pt->s != NULL ; pt++) 465 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 466 return pt->x; 467 return -1; 468 } 469 470 /** 471 * match_value takes a table and a value, returns the string associated 472 * with the value (NULL in case of failure). 473 */ 474 static char const * 475 match_value(struct _s_x *p, int value) 476 { 477 for (; p->s != NULL; p++) 478 if (p->x == value) 479 return p->s; 480 return NULL; 481 } 482 483 /* 484 * _substrcmp takes two strings and returns 1 if they do not match, 485 * and 0 if they match exactly or the first string is a sub-string 486 * of the second. A warning is printed to stderr in the case that the 487 * first string is a sub-string of the second. 488 * 489 * This function will be removed in the future through the usual 490 * deprecation process. 491 */ 492 static int 493 _substrcmp(const char *str1, const char* str2) 494 { 495 496 if (strncmp(str1, str2, strlen(str1)) != 0) 497 return 1; 498 499 if (strlen(str1) != strlen(str2)) 500 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 501 str1, str2); 502 return 0; 503 } 504 505 /* 506 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 507 * and 0 if they match exactly or the second string is a sub-string 508 * of the first. A warning is printed to stderr in the case that the 509 * first string does not match the third. 510 * 511 * This function exists to warn about the bizzare construction 512 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 513 * for "bytes". The problem is that in addition to accepting "by", 514 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 515 * other string beginning with "by". 516 * 517 * This function will be removed in the future through the usual 518 * deprecation process. 519 */ 520 static int 521 _substrcmp2(const char *str1, const char* str2, const char* str3) 522 { 523 524 if (strncmp(str1, str2, strlen(str2)) != 0) 525 return 1; 526 527 if (strcmp(str1, str3) != 0) 528 warnx("DEPRECATED: '%s' matched '%s'", 529 str1, str3); 530 return 0; 531 } 532 533 /* 534 * prints one port, symbolic or numeric 535 */ 536 static void 537 print_port(int proto, uint16_t port) 538 { 539 540 if (proto == IPPROTO_ETHERTYPE) { 541 char const *s; 542 543 if (do_resolv && (s = match_value(ether_types, port)) ) 544 printf("%s", s); 545 else 546 printf("0x%04x", port); 547 } else { 548 struct servent *se = NULL; 549 if (do_resolv) { 550 struct protoent *pe = getprotobynumber(proto); 551 552 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 553 } 554 if (se) 555 printf("%s", se->s_name); 556 else 557 printf("%d", port); 558 } 559 } 560 561 struct _s_x _port_name[] = { 562 {"dst-port", O_IP_DSTPORT}, 563 {"src-port", O_IP_SRCPORT}, 564 {"ipid", O_IPID}, 565 {"iplen", O_IPLEN}, 566 {"ipttl", O_IPTTL}, 567 {"mac-type", O_MAC_TYPE}, 568 {"tcpdatalen", O_TCPDATALEN}, 569 {NULL, 0} 570 }; 571 572 /* 573 * Print the values in a list 16-bit items of the types above. 574 * XXX todo: add support for mask. 575 */ 576 static void 577 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 578 { 579 uint16_t *p = cmd->ports; 580 int i; 581 char const *sep; 582 583 if (cmd->o.len & F_NOT) 584 printf(" not"); 585 if (opcode != 0) { 586 sep = match_value(_port_name, opcode); 587 if (sep == NULL) 588 sep = "???"; 589 printf (" %s", sep); 590 } 591 sep = " "; 592 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 593 printf(sep); 594 print_port(proto, p[0]); 595 if (p[0] != p[1]) { 596 printf("-"); 597 print_port(proto, p[1]); 598 } 599 sep = ","; 600 } 601 } 602 603 /* 604 * Like strtol, but also translates service names into port numbers 605 * for some protocols. 606 * In particular: 607 * proto == -1 disables the protocol check; 608 * proto == IPPROTO_ETHERTYPE looks up an internal table 609 * proto == <some value in /etc/protocols> matches the values there. 610 * Returns *end == s in case the parameter is not found. 611 */ 612 static int 613 strtoport(char *s, char **end, int base, int proto) 614 { 615 char *p, *buf; 616 char *s1; 617 int i; 618 619 *end = s; /* default - not found */ 620 if (*s == '\0') 621 return 0; /* not found */ 622 623 if (isdigit(*s)) 624 return strtol(s, end, base); 625 626 /* 627 * find separator. '\\' escapes the next char. 628 */ 629 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 630 if (*s1 == '\\' && s1[1] != '\0') 631 s1++; 632 633 buf = malloc(s1 - s + 1); 634 if (buf == NULL) 635 return 0; 636 637 /* 638 * copy into a buffer skipping backslashes 639 */ 640 for (p = s, i = 0; p != s1 ; p++) 641 if (*p != '\\') 642 buf[i++] = *p; 643 buf[i++] = '\0'; 644 645 if (proto == IPPROTO_ETHERTYPE) { 646 i = match_token(ether_types, buf); 647 free(buf); 648 if (i != -1) { /* found */ 649 *end = s1; 650 return i; 651 } 652 } else { 653 struct protoent *pe = NULL; 654 struct servent *se; 655 656 if (proto != 0) 657 pe = getprotobynumber(proto); 658 setservent(1); 659 se = getservbyname(buf, pe ? pe->p_name : NULL); 660 free(buf); 661 if (se != NULL) { 662 *end = s1; 663 return ntohs(se->s_port); 664 } 665 } 666 return 0; /* not found */ 667 } 668 669 /* 670 * Map between current altq queue id numbers and names. 671 */ 672 static int altq_fetched = 0; 673 static TAILQ_HEAD(, pf_altq) altq_entries = 674 TAILQ_HEAD_INITIALIZER(altq_entries); 675 676 static void 677 altq_set_enabled(int enabled) 678 { 679 int pffd; 680 681 pffd = open("/dev/pf", O_RDWR); 682 if (pffd == -1) 683 err(EX_UNAVAILABLE, 684 "altq support opening pf(4) control device"); 685 if (enabled) { 686 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 687 err(EX_UNAVAILABLE, "enabling altq"); 688 } else { 689 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 690 err(EX_UNAVAILABLE, "disabling altq"); 691 } 692 close(pffd); 693 } 694 695 static void 696 altq_fetch() 697 { 698 struct pfioc_altq pfioc; 699 struct pf_altq *altq; 700 int pffd, mnr; 701 702 if (altq_fetched) 703 return; 704 altq_fetched = 1; 705 pffd = open("/dev/pf", O_RDONLY); 706 if (pffd == -1) { 707 warn("altq support opening pf(4) control device"); 708 return; 709 } 710 bzero(&pfioc, sizeof(pfioc)); 711 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 712 warn("altq support getting queue list"); 713 close(pffd); 714 return; 715 } 716 mnr = pfioc.nr; 717 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 718 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 719 if (errno == EBUSY) 720 break; 721 warn("altq support getting queue list"); 722 close(pffd); 723 return; 724 } 725 if (pfioc.altq.qid == 0) 726 continue; 727 altq = malloc(sizeof(*altq)); 728 if (altq == NULL) 729 err(EX_OSERR, "malloc"); 730 *altq = pfioc.altq; 731 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 732 } 733 close(pffd); 734 } 735 736 static u_int32_t 737 altq_name_to_qid(const char *name) 738 { 739 struct pf_altq *altq; 740 741 altq_fetch(); 742 TAILQ_FOREACH(altq, &altq_entries, entries) 743 if (strcmp(name, altq->qname) == 0) 744 break; 745 if (altq == NULL) 746 errx(EX_DATAERR, "altq has no queue named `%s'", name); 747 return altq->qid; 748 } 749 750 static const char * 751 altq_qid_to_name(u_int32_t qid) 752 { 753 struct pf_altq *altq; 754 755 altq_fetch(); 756 TAILQ_FOREACH(altq, &altq_entries, entries) 757 if (qid == altq->qid) 758 break; 759 if (altq == NULL) 760 return NULL; 761 return altq->qname; 762 } 763 764 static void 765 fill_altq_qid(u_int32_t *qid, const char *av) 766 { 767 *qid = altq_name_to_qid(av); 768 } 769 770 /* 771 * Fill the body of the command with the list of port ranges. 772 */ 773 static int 774 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 775 { 776 uint16_t a, b, *p = cmd->ports; 777 int i = 0; 778 char *s = av; 779 780 while (*s) { 781 a = strtoport(av, &s, 0, proto); 782 if (s == av) /* no parameter */ 783 break; 784 if (*s == '-') { /* a range */ 785 av = s+1; 786 b = strtoport(av, &s, 0, proto); 787 if (s == av) /* no parameter */ 788 break; 789 p[0] = a; 790 p[1] = b; 791 } else if (*s == ',' || *s == '\0' ) 792 p[0] = p[1] = a; 793 else /* invalid separator */ 794 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 795 *s, av); 796 i++; 797 p += 2; 798 av = s+1; 799 } 800 if (i > 0) { 801 if (i+1 > F_LEN_MASK) 802 errx(EX_DATAERR, "too many ports/ranges\n"); 803 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 804 } 805 return i; 806 } 807 808 static struct _s_x icmpcodes[] = { 809 { "net", ICMP_UNREACH_NET }, 810 { "host", ICMP_UNREACH_HOST }, 811 { "protocol", ICMP_UNREACH_PROTOCOL }, 812 { "port", ICMP_UNREACH_PORT }, 813 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 814 { "srcfail", ICMP_UNREACH_SRCFAIL }, 815 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 816 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 817 { "isolated", ICMP_UNREACH_ISOLATED }, 818 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 819 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 820 { "tosnet", ICMP_UNREACH_TOSNET }, 821 { "toshost", ICMP_UNREACH_TOSHOST }, 822 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 823 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 824 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 825 { NULL, 0 } 826 }; 827 828 static void 829 fill_reject_code(u_short *codep, char *str) 830 { 831 int val; 832 char *s; 833 834 val = strtoul(str, &s, 0); 835 if (s == str || *s != '\0' || val >= 0x100) 836 val = match_token(icmpcodes, str); 837 if (val < 0) 838 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 839 *codep = val; 840 return; 841 } 842 843 static void 844 print_reject_code(uint16_t code) 845 { 846 char const *s = match_value(icmpcodes, code); 847 848 if (s != NULL) 849 printf("unreach %s", s); 850 else 851 printf("unreach %u", code); 852 } 853 854 /* 855 * Returns the number of bits set (from left) in a contiguous bitmask, 856 * or -1 if the mask is not contiguous. 857 * XXX this needs a proper fix. 858 * This effectively works on masks in big-endian (network) format. 859 * when compiled on little endian architectures. 860 * 861 * First bit is bit 7 of the first byte -- note, for MAC addresses, 862 * the first bit on the wire is bit 0 of the first byte. 863 * len is the max length in bits. 864 */ 865 static int 866 contigmask(uint8_t *p, int len) 867 { 868 int i, n; 869 870 for (i=0; i<len ; i++) 871 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 872 break; 873 for (n=i+1; n < len; n++) 874 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 875 return -1; /* mask not contiguous */ 876 return i; 877 } 878 879 /* 880 * print flags set/clear in the two bitmasks passed as parameters. 881 * There is a specialized check for f_tcpflags. 882 */ 883 static void 884 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 885 { 886 char const *comma = ""; 887 int i; 888 uint8_t set = cmd->arg1 & 0xff; 889 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 890 891 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 892 printf(" setup"); 893 return; 894 } 895 896 printf(" %s ", name); 897 for (i=0; list[i].x != 0; i++) { 898 if (set & list[i].x) { 899 set &= ~list[i].x; 900 printf("%s%s", comma, list[i].s); 901 comma = ","; 902 } 903 if (clear & list[i].x) { 904 clear &= ~list[i].x; 905 printf("%s!%s", comma, list[i].s); 906 comma = ","; 907 } 908 } 909 } 910 911 /* 912 * Print the ip address contained in a command. 913 */ 914 static void 915 print_ip(ipfw_insn_ip *cmd, char const *s) 916 { 917 struct hostent *he = NULL; 918 int len = F_LEN((ipfw_insn *)cmd); 919 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 920 921 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 922 923 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 924 printf("me"); 925 return; 926 } 927 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 928 cmd->o.opcode == O_IP_DST_LOOKUP) { 929 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 930 if (len == F_INSN_SIZE(ipfw_insn_u32)) 931 printf(",%u", *a); 932 printf(")"); 933 return; 934 } 935 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 936 uint32_t x, *map = (uint32_t *)&(cmd->mask); 937 int i, j; 938 char comma = '{'; 939 940 x = cmd->o.arg1 - 1; 941 x = htonl( ~x ); 942 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 943 printf("%s/%d", inet_ntoa(cmd->addr), 944 contigmask((uint8_t *)&x, 32)); 945 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 946 x &= 0xff; /* base */ 947 /* 948 * Print bits and ranges. 949 * Locate first bit set (i), then locate first bit unset (j). 950 * If we have 3+ consecutive bits set, then print them as a 951 * range, otherwise only print the initial bit and rescan. 952 */ 953 for (i=0; i < cmd->o.arg1; i++) 954 if (map[i/32] & (1<<(i & 31))) { 955 for (j=i+1; j < cmd->o.arg1; j++) 956 if (!(map[ j/32] & (1<<(j & 31)))) 957 break; 958 printf("%c%d", comma, i+x); 959 if (j>i+2) { /* range has at least 3 elements */ 960 printf("-%d", j-1+x); 961 i = j-1; 962 } 963 comma = ','; 964 } 965 printf("}"); 966 return; 967 } 968 /* 969 * len == 2 indicates a single IP, whereas lists of 1 or more 970 * addr/mask pairs have len = (2n+1). We convert len to n so we 971 * use that to count the number of entries. 972 */ 973 for (len = len / 2; len > 0; len--, a += 2) { 974 int mb = /* mask length */ 975 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 976 32 : contigmask((uint8_t *)&(a[1]), 32); 977 if (mb == 32 && do_resolv) 978 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 979 if (he != NULL) /* resolved to name */ 980 printf("%s", he->h_name); 981 else if (mb == 0) /* any */ 982 printf("any"); 983 else { /* numeric IP followed by some kind of mask */ 984 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 985 if (mb < 0) 986 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 987 else if (mb < 32) 988 printf("/%d", mb); 989 } 990 if (len > 1) 991 printf(","); 992 } 993 } 994 995 /* 996 * prints a MAC address/mask pair 997 */ 998 static void 999 print_mac(uint8_t *addr, uint8_t *mask) 1000 { 1001 int l = contigmask(mask, 48); 1002 1003 if (l == 0) 1004 printf(" any"); 1005 else { 1006 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1007 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1008 if (l == -1) 1009 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1010 mask[0], mask[1], mask[2], 1011 mask[3], mask[4], mask[5]); 1012 else if (l < 48) 1013 printf("/%d", l); 1014 } 1015 } 1016 1017 static void 1018 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1019 { 1020 uint8_t type; 1021 1022 cmd->d[0] = 0; 1023 while (*av) { 1024 if (*av == ',') 1025 av++; 1026 1027 type = strtoul(av, &av, 0); 1028 1029 if (*av != ',' && *av != '\0') 1030 errx(EX_DATAERR, "invalid ICMP type"); 1031 1032 if (type > 31) 1033 errx(EX_DATAERR, "ICMP type out of range"); 1034 1035 cmd->d[0] |= 1 << type; 1036 } 1037 cmd->o.opcode = O_ICMPTYPE; 1038 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1039 } 1040 1041 static void 1042 print_icmptypes(ipfw_insn_u32 *cmd) 1043 { 1044 int i; 1045 char sep= ' '; 1046 1047 printf(" icmptypes"); 1048 for (i = 0; i < 32; i++) { 1049 if ( (cmd->d[0] & (1 << (i))) == 0) 1050 continue; 1051 printf("%c%d", sep, i); 1052 sep = ','; 1053 } 1054 } 1055 1056 /* 1057 * Print the ip address contained in a command. 1058 */ 1059 static void 1060 print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1061 { 1062 struct hostent *he = NULL; 1063 int len = F_LEN((ipfw_insn *) cmd) - 1; 1064 struct in6_addr *a = &(cmd->addr6); 1065 char trad[255]; 1066 1067 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1068 1069 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1070 printf("me6"); 1071 return; 1072 } 1073 if (cmd->o.opcode == O_IP6) { 1074 printf(" ipv6"); 1075 return; 1076 } 1077 1078 /* 1079 * len == 4 indicates a single IP, whereas lists of 1 or more 1080 * addr/mask pairs have len = (2n+1). We convert len to n so we 1081 * use that to count the number of entries. 1082 */ 1083 1084 for (len = len / 4; len > 0; len -= 2, a += 2) { 1085 int mb = /* mask length */ 1086 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1087 128 : contigmask((uint8_t *)&(a[1]), 128); 1088 1089 if (mb == 128 && do_resolv) 1090 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1091 if (he != NULL) /* resolved to name */ 1092 printf("%s", he->h_name); 1093 else if (mb == 0) /* any */ 1094 printf("any"); 1095 else { /* numeric IP followed by some kind of mask */ 1096 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1097 printf("Error ntop in print_ip6\n"); 1098 printf("%s", trad ); 1099 if (mb < 0) /* XXX not really legal... */ 1100 printf(":%s", 1101 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1102 else if (mb < 128) 1103 printf("/%d", mb); 1104 } 1105 if (len > 2) 1106 printf(","); 1107 } 1108 } 1109 1110 static void 1111 fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1112 { 1113 uint8_t type; 1114 1115 cmd->d[0] = 0; 1116 while (*av) { 1117 if (*av == ',') 1118 av++; 1119 type = strtoul(av, &av, 0); 1120 if (*av != ',' && *av != '\0') 1121 errx(EX_DATAERR, "invalid ICMP6 type"); 1122 /* 1123 * XXX: shouldn't this be 0xFF? I can't see any reason why 1124 * we shouldn't be able to filter all possiable values 1125 * regardless of the ability of the rest of the kernel to do 1126 * anything useful with them. 1127 */ 1128 if (type > ICMP6_MAXTYPE) 1129 errx(EX_DATAERR, "ICMP6 type out of range"); 1130 cmd->d[type / 32] |= ( 1 << (type % 32)); 1131 } 1132 cmd->o.opcode = O_ICMP6TYPE; 1133 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1134 } 1135 1136 1137 static void 1138 print_icmp6types(ipfw_insn_u32 *cmd) 1139 { 1140 int i, j; 1141 char sep= ' '; 1142 1143 printf(" ipv6 icmp6types"); 1144 for (i = 0; i < 7; i++) 1145 for (j=0; j < 32; ++j) { 1146 if ( (cmd->d[i] & (1 << (j))) == 0) 1147 continue; 1148 printf("%c%d", sep, (i*32 + j)); 1149 sep = ','; 1150 } 1151 } 1152 1153 static void 1154 print_flow6id( ipfw_insn_u32 *cmd) 1155 { 1156 uint16_t i, limit = cmd->o.arg1; 1157 char sep = ','; 1158 1159 printf(" flow-id "); 1160 for( i=0; i < limit; ++i) { 1161 if (i == limit - 1) 1162 sep = ' '; 1163 printf("%d%c", cmd->d[i], sep); 1164 } 1165 } 1166 1167 /* structure and define for the extension header in ipv6 */ 1168 static struct _s_x ext6hdrcodes[] = { 1169 { "frag", EXT_FRAGMENT }, 1170 { "hopopt", EXT_HOPOPTS }, 1171 { "route", EXT_ROUTING }, 1172 { "ah", EXT_AH }, 1173 { "esp", EXT_ESP }, 1174 { NULL, 0 } 1175 }; 1176 1177 /* fills command for the extension header filtering */ 1178 int 1179 fill_ext6hdr( ipfw_insn *cmd, char *av) 1180 { 1181 int tok; 1182 char *s = av; 1183 1184 cmd->arg1 = 0; 1185 1186 while(s) { 1187 av = strsep( &s, ",") ; 1188 tok = match_token(ext6hdrcodes, av); 1189 switch (tok) { 1190 case EXT_FRAGMENT: 1191 cmd->arg1 |= EXT_FRAGMENT; 1192 break; 1193 1194 case EXT_HOPOPTS: 1195 cmd->arg1 |= EXT_HOPOPTS; 1196 break; 1197 1198 case EXT_ROUTING: 1199 cmd->arg1 |= EXT_ROUTING; 1200 break; 1201 1202 case EXT_AH: 1203 cmd->arg1 |= EXT_AH; 1204 break; 1205 1206 case EXT_ESP: 1207 cmd->arg1 |= EXT_ESP; 1208 break; 1209 1210 default: 1211 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1212 break; 1213 } 1214 } 1215 if (cmd->arg1 == 0 ) 1216 return 0; 1217 cmd->opcode = O_EXT_HDR; 1218 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1219 return 1; 1220 } 1221 1222 void 1223 print_ext6hdr( ipfw_insn *cmd ) 1224 { 1225 char sep = ' '; 1226 1227 printf(" extension header:"); 1228 if (cmd->arg1 & EXT_FRAGMENT ) { 1229 printf("%cfragmentation", sep); 1230 sep = ','; 1231 } 1232 if (cmd->arg1 & EXT_HOPOPTS ) { 1233 printf("%chop options", sep); 1234 sep = ','; 1235 } 1236 if (cmd->arg1 & EXT_ROUTING ) { 1237 printf("%crouting options", sep); 1238 sep = ','; 1239 } 1240 if (cmd->arg1 & EXT_AH ) { 1241 printf("%cauthentication header", sep); 1242 sep = ','; 1243 } 1244 if (cmd->arg1 & EXT_ESP ) { 1245 printf("%cencapsulated security payload", sep); 1246 } 1247 } 1248 1249 /* 1250 * show_ipfw() prints the body of an ipfw rule. 1251 * Because the standard rule has at least proto src_ip dst_ip, we use 1252 * a helper function to produce these entries if not provided explicitly. 1253 * The first argument is the list of fields we have, the second is 1254 * the list of fields we want to be printed. 1255 * 1256 * Special cases if we have provided a MAC header: 1257 * + if the rule does not contain IP addresses/ports, do not print them; 1258 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1259 * 1260 * Once we have 'have_options', IP header fields are printed as options. 1261 */ 1262 #define HAVE_PROTO 0x0001 1263 #define HAVE_SRCIP 0x0002 1264 #define HAVE_DSTIP 0x0004 1265 #define HAVE_MAC 0x0008 1266 #define HAVE_MACTYPE 0x0010 1267 #define HAVE_PROTO4 0x0040 1268 #define HAVE_PROTO6 0x0080 1269 #define HAVE_OPTIONS 0x8000 1270 1271 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1272 static void 1273 show_prerequisites(int *flags, int want, int cmd) 1274 { 1275 if (comment_only) 1276 return; 1277 if ( (*flags & HAVE_IP) == HAVE_IP) 1278 *flags |= HAVE_OPTIONS; 1279 1280 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 1281 cmd != O_MAC_TYPE) { 1282 /* 1283 * mac-type was optimized out by the compiler, 1284 * restore it 1285 */ 1286 printf(" any"); 1287 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 1288 return; 1289 } 1290 if ( !(*flags & HAVE_OPTIONS)) { 1291 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1292 if ( (*flags & HAVE_PROTO4)) 1293 printf(" ip4"); 1294 else if ( (*flags & HAVE_PROTO6)) 1295 printf(" ip6"); 1296 else 1297 printf(" ip"); 1298 1299 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1300 printf(" from any"); 1301 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1302 printf(" to any"); 1303 } 1304 *flags |= want; 1305 } 1306 1307 static void 1308 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1309 { 1310 static int twidth = 0; 1311 int l; 1312 ipfw_insn *cmd; 1313 char *comment = NULL; /* ptr to comment if we have one */ 1314 int proto = 0; /* default */ 1315 int flags = 0; /* prerequisites */ 1316 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1317 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1318 int or_block = 0; /* we are in an or block */ 1319 uint32_t set_disable; 1320 1321 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1322 1323 if (set_disable & (1 << rule->set)) { /* disabled */ 1324 if (!show_sets) 1325 return; 1326 else 1327 printf("# DISABLED "); 1328 } 1329 printf("%05u ", rule->rulenum); 1330 1331 if (pcwidth>0 || bcwidth>0) 1332 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1333 bcwidth, align_uint64(&rule->bcnt)); 1334 1335 if (do_time == 2) 1336 printf("%10u ", rule->timestamp); 1337 else if (do_time == 1) { 1338 char timestr[30]; 1339 time_t t = (time_t)0; 1340 1341 if (twidth == 0) { 1342 strcpy(timestr, ctime(&t)); 1343 *strchr(timestr, '\n') = '\0'; 1344 twidth = strlen(timestr); 1345 } 1346 if (rule->timestamp) { 1347 #if _FreeBSD_version < 500000 /* XXX check */ 1348 #define _long_to_time(x) (time_t)(x) 1349 #endif 1350 t = _long_to_time(rule->timestamp); 1351 1352 strcpy(timestr, ctime(&t)); 1353 *strchr(timestr, '\n') = '\0'; 1354 printf("%s ", timestr); 1355 } else { 1356 printf("%*s", twidth, " "); 1357 } 1358 } 1359 1360 if (show_sets) 1361 printf("set %d ", rule->set); 1362 1363 /* 1364 * print the optional "match probability" 1365 */ 1366 if (rule->cmd_len > 0) { 1367 cmd = rule->cmd ; 1368 if (cmd->opcode == O_PROB) { 1369 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1370 double d = 1.0 * p->d[0]; 1371 1372 d = (d / 0x7fffffff); 1373 printf("prob %f ", d); 1374 } 1375 } 1376 1377 /* 1378 * first print actions 1379 */ 1380 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1381 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1382 switch(cmd->opcode) { 1383 case O_CHECK_STATE: 1384 printf("check-state"); 1385 flags = HAVE_IP; /* avoid printing anything else */ 1386 break; 1387 1388 case O_ACCEPT: 1389 printf("allow"); 1390 break; 1391 1392 case O_COUNT: 1393 printf("count"); 1394 break; 1395 1396 case O_DENY: 1397 printf("deny"); 1398 break; 1399 1400 case O_REJECT: 1401 if (cmd->arg1 == ICMP_REJECT_RST) 1402 printf("reset"); 1403 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1404 printf("reject"); 1405 else 1406 print_reject_code(cmd->arg1); 1407 break; 1408 1409 case O_SKIPTO: 1410 printf("skipto %u", cmd->arg1); 1411 break; 1412 1413 case O_PIPE: 1414 printf("pipe %u", cmd->arg1); 1415 break; 1416 1417 case O_QUEUE: 1418 printf("queue %u", cmd->arg1); 1419 break; 1420 1421 case O_DIVERT: 1422 printf("divert %u", cmd->arg1); 1423 break; 1424 1425 case O_TEE: 1426 printf("tee %u", cmd->arg1); 1427 break; 1428 1429 case O_NETGRAPH: 1430 printf("netgraph %u", cmd->arg1); 1431 break; 1432 1433 case O_NGTEE: 1434 printf("ngtee %u", cmd->arg1); 1435 break; 1436 1437 case O_FORWARD_IP: 1438 { 1439 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1440 1441 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1442 if (s->sa.sin_port) 1443 printf(",%d", s->sa.sin_port); 1444 } 1445 break; 1446 1447 case O_LOG: /* O_LOG is printed last */ 1448 logptr = (ipfw_insn_log *)cmd; 1449 break; 1450 1451 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1452 altqptr = (ipfw_insn_altq *)cmd; 1453 break; 1454 1455 default: 1456 printf("** unrecognized action %d len %d ", 1457 cmd->opcode, cmd->len); 1458 } 1459 } 1460 if (logptr) { 1461 if (logptr->max_log > 0) 1462 printf(" log logamount %d", logptr->max_log); 1463 else 1464 printf(" log"); 1465 } 1466 if (altqptr) { 1467 const char *qname; 1468 1469 qname = altq_qid_to_name(altqptr->qid); 1470 if (qname == NULL) 1471 printf(" altq ?<%u>", altqptr->qid); 1472 else 1473 printf(" altq %s", qname); 1474 } 1475 1476 /* 1477 * then print the body. 1478 */ 1479 for (l = rule->act_ofs, cmd = rule->cmd ; 1480 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1481 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1482 continue; 1483 if (cmd->opcode == O_IP4) { 1484 flags |= HAVE_PROTO4; 1485 break; 1486 } else if (cmd->opcode == O_IP6) { 1487 flags |= HAVE_PROTO6; 1488 break; 1489 } 1490 } 1491 if (rule->_pad & 1) { /* empty rules before options */ 1492 if (!do_compact) { 1493 show_prerequisites(&flags, HAVE_PROTO, 0); 1494 printf(" from any to any"); 1495 } 1496 flags |= HAVE_IP | HAVE_OPTIONS; 1497 } 1498 1499 if (comment_only) 1500 comment = "..."; 1501 1502 for (l = rule->act_ofs, cmd = rule->cmd ; 1503 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1504 /* useful alias */ 1505 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1506 1507 if (comment_only) { 1508 if (cmd->opcode != O_NOP) 1509 continue; 1510 printf(" // %s\n", (char *)(cmd + 1)); 1511 return; 1512 } 1513 1514 show_prerequisites(&flags, 0, cmd->opcode); 1515 1516 switch(cmd->opcode) { 1517 case O_PROB: 1518 break; /* done already */ 1519 1520 case O_PROBE_STATE: 1521 break; /* no need to print anything here */ 1522 1523 case O_MACADDR2: { 1524 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1525 1526 if ((cmd->len & F_OR) && !or_block) 1527 printf(" {"); 1528 if (cmd->len & F_NOT) 1529 printf(" not"); 1530 printf(" MAC"); 1531 flags |= HAVE_MAC; 1532 print_mac(m->addr, m->mask); 1533 print_mac(m->addr + 6, m->mask + 6); 1534 } 1535 break; 1536 1537 case O_MAC_TYPE: 1538 if ((cmd->len & F_OR) && !or_block) 1539 printf(" {"); 1540 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1541 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1542 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1543 break; 1544 1545 case O_IP_SRC: 1546 case O_IP_SRC_LOOKUP: 1547 case O_IP_SRC_MASK: 1548 case O_IP_SRC_ME: 1549 case O_IP_SRC_SET: 1550 show_prerequisites(&flags, HAVE_PROTO, 0); 1551 if (!(flags & HAVE_SRCIP)) 1552 printf(" from"); 1553 if ((cmd->len & F_OR) && !or_block) 1554 printf(" {"); 1555 print_ip((ipfw_insn_ip *)cmd, 1556 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1557 flags |= HAVE_SRCIP; 1558 break; 1559 1560 case O_IP_DST: 1561 case O_IP_DST_LOOKUP: 1562 case O_IP_DST_MASK: 1563 case O_IP_DST_ME: 1564 case O_IP_DST_SET: 1565 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1566 if (!(flags & HAVE_DSTIP)) 1567 printf(" to"); 1568 if ((cmd->len & F_OR) && !or_block) 1569 printf(" {"); 1570 print_ip((ipfw_insn_ip *)cmd, 1571 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1572 flags |= HAVE_DSTIP; 1573 break; 1574 1575 case O_IP6_SRC: 1576 case O_IP6_SRC_MASK: 1577 case O_IP6_SRC_ME: 1578 show_prerequisites(&flags, HAVE_PROTO6, 0); 1579 if (!(flags & HAVE_SRCIP)) 1580 printf(" from"); 1581 if ((cmd->len & F_OR) && !or_block) 1582 printf(" {"); 1583 print_ip6((ipfw_insn_ip6 *)cmd, 1584 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1585 flags |= HAVE_SRCIP | HAVE_PROTO; 1586 break; 1587 1588 case O_IP6_DST: 1589 case O_IP6_DST_MASK: 1590 case O_IP6_DST_ME: 1591 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1592 if (!(flags & HAVE_DSTIP)) 1593 printf(" to"); 1594 if ((cmd->len & F_OR) && !or_block) 1595 printf(" {"); 1596 print_ip6((ipfw_insn_ip6 *)cmd, 1597 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1598 flags |= HAVE_DSTIP; 1599 break; 1600 1601 case O_FLOW6ID: 1602 print_flow6id( (ipfw_insn_u32 *) cmd ); 1603 flags |= HAVE_OPTIONS; 1604 break; 1605 1606 case O_IP_DSTPORT: 1607 show_prerequisites(&flags, HAVE_IP, 0); 1608 case O_IP_SRCPORT: 1609 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1610 if ((cmd->len & F_OR) && !or_block) 1611 printf(" {"); 1612 print_newports((ipfw_insn_u16 *)cmd, proto, 1613 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1614 break; 1615 1616 case O_PROTO: { 1617 struct protoent *pe = NULL; 1618 1619 if ((cmd->len & F_OR) && !or_block) 1620 printf(" {"); 1621 if (cmd->len & F_NOT) 1622 printf(" not"); 1623 proto = cmd->arg1; 1624 pe = getprotobynumber(cmd->arg1); 1625 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1626 !(flags & HAVE_PROTO)) 1627 show_prerequisites(&flags, 1628 HAVE_IP | HAVE_OPTIONS, 0); 1629 if (flags & HAVE_OPTIONS) 1630 printf(" proto"); 1631 if (pe) 1632 printf(" %s", pe->p_name); 1633 else 1634 printf(" %u", cmd->arg1); 1635 } 1636 flags |= HAVE_PROTO; 1637 break; 1638 1639 default: /*options ... */ 1640 if (!(cmd->len & (F_OR|F_NOT))) 1641 if (((cmd->opcode == O_IP6) && 1642 (flags & HAVE_PROTO6)) || 1643 ((cmd->opcode == O_IP4) && 1644 (flags & HAVE_PROTO4))) 1645 break; 1646 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1647 if ((cmd->len & F_OR) && !or_block) 1648 printf(" {"); 1649 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1650 printf(" not"); 1651 switch(cmd->opcode) { 1652 case O_FRAG: 1653 printf(" frag"); 1654 break; 1655 1656 case O_IN: 1657 printf(cmd->len & F_NOT ? " out" : " in"); 1658 break; 1659 1660 case O_DIVERTED: 1661 switch (cmd->arg1) { 1662 case 3: 1663 printf(" diverted"); 1664 break; 1665 case 1: 1666 printf(" diverted-loopback"); 1667 break; 1668 case 2: 1669 printf(" diverted-output"); 1670 break; 1671 default: 1672 printf(" diverted-?<%u>", cmd->arg1); 1673 break; 1674 } 1675 break; 1676 1677 case O_LAYER2: 1678 printf(" layer2"); 1679 break; 1680 case O_XMIT: 1681 case O_RECV: 1682 case O_VIA: 1683 { 1684 char const *s; 1685 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1686 1687 if (cmd->opcode == O_XMIT) 1688 s = "xmit"; 1689 else if (cmd->opcode == O_RECV) 1690 s = "recv"; 1691 else /* if (cmd->opcode == O_VIA) */ 1692 s = "via"; 1693 if (cmdif->name[0] == '\0') 1694 printf(" %s %s", s, 1695 inet_ntoa(cmdif->p.ip)); 1696 else 1697 printf(" %s %s", s, cmdif->name); 1698 1699 break; 1700 } 1701 case O_IPID: 1702 if (F_LEN(cmd) == 1) 1703 printf(" ipid %u", cmd->arg1 ); 1704 else 1705 print_newports((ipfw_insn_u16 *)cmd, 0, 1706 O_IPID); 1707 break; 1708 1709 case O_IPTTL: 1710 if (F_LEN(cmd) == 1) 1711 printf(" ipttl %u", cmd->arg1 ); 1712 else 1713 print_newports((ipfw_insn_u16 *)cmd, 0, 1714 O_IPTTL); 1715 break; 1716 1717 case O_IPVER: 1718 printf(" ipver %u", cmd->arg1 ); 1719 break; 1720 1721 case O_IPPRECEDENCE: 1722 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1723 break; 1724 1725 case O_IPLEN: 1726 if (F_LEN(cmd) == 1) 1727 printf(" iplen %u", cmd->arg1 ); 1728 else 1729 print_newports((ipfw_insn_u16 *)cmd, 0, 1730 O_IPLEN); 1731 break; 1732 1733 case O_IPOPT: 1734 print_flags("ipoptions", cmd, f_ipopts); 1735 break; 1736 1737 case O_IPTOS: 1738 print_flags("iptos", cmd, f_iptos); 1739 break; 1740 1741 case O_ICMPTYPE: 1742 print_icmptypes((ipfw_insn_u32 *)cmd); 1743 break; 1744 1745 case O_ESTAB: 1746 printf(" established"); 1747 break; 1748 1749 case O_TCPDATALEN: 1750 if (F_LEN(cmd) == 1) 1751 printf(" tcpdatalen %u", cmd->arg1 ); 1752 else 1753 print_newports((ipfw_insn_u16 *)cmd, 0, 1754 O_TCPDATALEN); 1755 break; 1756 1757 case O_TCPFLAGS: 1758 print_flags("tcpflags", cmd, f_tcpflags); 1759 break; 1760 1761 case O_TCPOPTS: 1762 print_flags("tcpoptions", cmd, f_tcpopts); 1763 break; 1764 1765 case O_TCPWIN: 1766 printf(" tcpwin %d", ntohs(cmd->arg1)); 1767 break; 1768 1769 case O_TCPACK: 1770 printf(" tcpack %d", ntohl(cmd32->d[0])); 1771 break; 1772 1773 case O_TCPSEQ: 1774 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1775 break; 1776 1777 case O_UID: 1778 { 1779 struct passwd *pwd = getpwuid(cmd32->d[0]); 1780 1781 if (pwd) 1782 printf(" uid %s", pwd->pw_name); 1783 else 1784 printf(" uid %u", cmd32->d[0]); 1785 } 1786 break; 1787 1788 case O_GID: 1789 { 1790 struct group *grp = getgrgid(cmd32->d[0]); 1791 1792 if (grp) 1793 printf(" gid %s", grp->gr_name); 1794 else 1795 printf(" gid %u", cmd32->d[0]); 1796 } 1797 break; 1798 1799 case O_JAIL: 1800 printf(" jail %d", cmd32->d[0]); 1801 break; 1802 1803 case O_VERREVPATH: 1804 printf(" verrevpath"); 1805 break; 1806 1807 case O_VERSRCREACH: 1808 printf(" versrcreach"); 1809 break; 1810 1811 case O_ANTISPOOF: 1812 printf(" antispoof"); 1813 break; 1814 1815 case O_IPSEC: 1816 printf(" ipsec"); 1817 break; 1818 1819 case O_NOP: 1820 comment = (char *)(cmd + 1); 1821 break; 1822 1823 case O_KEEP_STATE: 1824 printf(" keep-state"); 1825 break; 1826 1827 case O_LIMIT: 1828 { 1829 struct _s_x *p = limit_masks; 1830 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1831 uint8_t x = c->limit_mask; 1832 char const *comma = " "; 1833 1834 printf(" limit"); 1835 for (; p->x != 0 ; p++) 1836 if ((x & p->x) == p->x) { 1837 x &= ~p->x; 1838 printf("%s%s", comma, p->s); 1839 comma = ","; 1840 } 1841 printf(" %d", c->conn_limit); 1842 } 1843 break; 1844 1845 case O_IP6: 1846 printf(" ipv6"); 1847 break; 1848 1849 case O_IP4: 1850 printf(" ipv4"); 1851 break; 1852 1853 case O_ICMP6TYPE: 1854 print_icmp6types((ipfw_insn_u32 *)cmd); 1855 break; 1856 1857 case O_EXT_HDR: 1858 print_ext6hdr( (ipfw_insn *) cmd ); 1859 break; 1860 1861 default: 1862 printf(" [opcode %d len %d]", 1863 cmd->opcode, cmd->len); 1864 } 1865 } 1866 if (cmd->len & F_OR) { 1867 printf(" or"); 1868 or_block = 1; 1869 } else if (or_block) { 1870 printf(" }"); 1871 or_block = 0; 1872 } 1873 } 1874 show_prerequisites(&flags, HAVE_IP, 0); 1875 if (comment) 1876 printf(" // %s", comment); 1877 printf("\n"); 1878 } 1879 1880 static void 1881 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1882 { 1883 struct protoent *pe; 1884 struct in_addr a; 1885 uint16_t rulenum; 1886 1887 if (!do_expired) { 1888 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1889 return; 1890 } 1891 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1892 printf("%05d", rulenum); 1893 if (pcwidth>0 || bcwidth>0) 1894 printf(" %*llu %*llu (%ds)", pcwidth, 1895 align_uint64(&d->pcnt), bcwidth, 1896 align_uint64(&d->bcnt), d->expire); 1897 switch (d->dyn_type) { 1898 case O_LIMIT_PARENT: 1899 printf(" PARENT %d", d->count); 1900 break; 1901 case O_LIMIT: 1902 printf(" LIMIT"); 1903 break; 1904 case O_KEEP_STATE: /* bidir, no mask */ 1905 printf(" STATE"); 1906 break; 1907 } 1908 1909 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1910 printf(" %s", pe->p_name); 1911 else 1912 printf(" proto %u", d->id.proto); 1913 1914 a.s_addr = htonl(d->id.src_ip); 1915 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1916 1917 a.s_addr = htonl(d->id.dst_ip); 1918 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1919 printf("\n"); 1920 } 1921 1922 static int 1923 sort_q(const void *pa, const void *pb) 1924 { 1925 int rev = (do_sort < 0); 1926 int field = rev ? -do_sort : do_sort; 1927 long long res = 0; 1928 const struct dn_flow_queue *a = pa; 1929 const struct dn_flow_queue *b = pb; 1930 1931 switch (field) { 1932 case 1: /* pkts */ 1933 res = a->len - b->len; 1934 break; 1935 case 2: /* bytes */ 1936 res = a->len_bytes - b->len_bytes; 1937 break; 1938 1939 case 3: /* tot pkts */ 1940 res = a->tot_pkts - b->tot_pkts; 1941 break; 1942 1943 case 4: /* tot bytes */ 1944 res = a->tot_bytes - b->tot_bytes; 1945 break; 1946 } 1947 if (res < 0) 1948 res = -1; 1949 if (res > 0) 1950 res = 1; 1951 return (int)(rev ? res : -res); 1952 } 1953 1954 static void 1955 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1956 { 1957 int l; 1958 int index_printed, indexes = 0; 1959 char buff[255]; 1960 struct protoent *pe; 1961 1962 if (fs->rq_elements == 0) 1963 return; 1964 1965 if (do_sort != 0) 1966 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1967 1968 /* Print IPv4 flows */ 1969 index_printed = 0; 1970 for (l = 0; l < fs->rq_elements; l++) { 1971 struct in_addr ina; 1972 1973 /* XXX: Should check for IPv4 flows */ 1974 if (IS_IP6_FLOW_ID(&(q[l].id))) 1975 continue; 1976 1977 if (!index_printed) { 1978 index_printed = 1; 1979 if (indexes > 0) /* currently a no-op */ 1980 printf("\n"); 1981 indexes++; 1982 printf(" " 1983 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1984 fs->flow_mask.proto, 1985 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1986 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1987 1988 printf("BKT Prot ___Source IP/port____ " 1989 "____Dest. IP/port____ " 1990 "Tot_pkt/bytes Pkt/Byte Drp\n"); 1991 } 1992 1993 printf("%3d ", q[l].hash_slot); 1994 pe = getprotobynumber(q[l].id.proto); 1995 if (pe) 1996 printf("%-4s ", pe->p_name); 1997 else 1998 printf("%4u ", q[l].id.proto); 1999 ina.s_addr = htonl(q[l].id.src_ip); 2000 printf("%15s/%-5d ", 2001 inet_ntoa(ina), q[l].id.src_port); 2002 ina.s_addr = htonl(q[l].id.dst_ip); 2003 printf("%15s/%-5d ", 2004 inet_ntoa(ina), q[l].id.dst_port); 2005 printf("%4qu %8qu %2u %4u %3u\n", 2006 q[l].tot_pkts, q[l].tot_bytes, 2007 q[l].len, q[l].len_bytes, q[l].drops); 2008 if (verbose) 2009 printf(" S %20qd F %20qd\n", 2010 q[l].S, q[l].F); 2011 } 2012 2013 /* Print IPv6 flows */ 2014 index_printed = 0; 2015 for (l = 0; l < fs->rq_elements; l++) { 2016 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2017 continue; 2018 2019 if (!index_printed) { 2020 index_printed = 1; 2021 if (indexes > 0) 2022 printf("\n"); 2023 indexes++; 2024 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2025 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2026 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2027 buff, sizeof(buff)); 2028 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2029 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2030 buff, sizeof(buff) ); 2031 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2032 2033 printf("BKT ___Prot___ _flow-id_ " 2034 "______________Source IPv6/port_______________ " 2035 "_______________Dest. IPv6/port_______________ " 2036 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2037 } 2038 printf("%3d ", q[l].hash_slot); 2039 pe = getprotobynumber(q[l].id.proto); 2040 if (pe != NULL) 2041 printf("%9s ", pe->p_name); 2042 else 2043 printf("%9u ", q[l].id.proto); 2044 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2045 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2046 q[l].id.src_port); 2047 printf(" %39s/%-5d ", 2048 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2049 q[l].id.dst_port); 2050 printf(" %4qu %8qu %2u %4u %3u\n", 2051 q[l].tot_pkts, q[l].tot_bytes, 2052 q[l].len, q[l].len_bytes, q[l].drops); 2053 if (verbose) 2054 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2055 } 2056 } 2057 2058 static void 2059 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2060 { 2061 int l; 2062 char qs[30]; 2063 char plr[30]; 2064 char red[90]; /* Display RED parameters */ 2065 2066 l = fs->qsize; 2067 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2068 if (l >= 8192) 2069 sprintf(qs, "%d KB", l / 1024); 2070 else 2071 sprintf(qs, "%d B", l); 2072 } else 2073 sprintf(qs, "%3d sl.", l); 2074 if (fs->plr) 2075 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2076 else 2077 plr[0] = '\0'; 2078 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2079 sprintf(red, 2080 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2081 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2082 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2083 SCALE_VAL(fs->min_th), 2084 SCALE_VAL(fs->max_th), 2085 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2086 else 2087 sprintf(red, "droptail"); 2088 2089 printf("%s %s%s %d queues (%d buckets) %s\n", 2090 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2091 } 2092 2093 static void 2094 list_pipes(void *data, uint nbytes, int ac, char *av[]) 2095 { 2096 int rulenum; 2097 void *next = data; 2098 struct dn_pipe *p = (struct dn_pipe *) data; 2099 struct dn_flow_set *fs; 2100 struct dn_flow_queue *q; 2101 int l; 2102 2103 if (ac > 0) 2104 rulenum = strtoul(*av++, NULL, 10); 2105 else 2106 rulenum = 0; 2107 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2108 double b = p->bandwidth; 2109 char buf[30]; 2110 char prefix[80]; 2111 2112 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 2113 break; /* done with pipes, now queues */ 2114 2115 /* 2116 * compute length, as pipe have variable size 2117 */ 2118 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2119 next = (char *)p + l; 2120 nbytes -= l; 2121 2122 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2123 continue; 2124 2125 /* 2126 * Print rate (or clocking interface) 2127 */ 2128 if (p->if_name[0] != '\0') 2129 sprintf(buf, "%s", p->if_name); 2130 else if (b == 0) 2131 sprintf(buf, "unlimited"); 2132 else if (b >= 1000000) 2133 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2134 else if (b >= 1000) 2135 sprintf(buf, "%7.3f Kbit/s", b/1000); 2136 else 2137 sprintf(buf, "%7.3f bit/s ", b); 2138 2139 sprintf(prefix, "%05d: %s %4d ms ", 2140 p->pipe_nr, buf, p->delay); 2141 print_flowset_parms(&(p->fs), prefix); 2142 if (verbose) 2143 printf(" V %20qd\n", p->V >> MY_M); 2144 2145 q = (struct dn_flow_queue *)(p+1); 2146 list_queues(&(p->fs), q); 2147 } 2148 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2149 char prefix[80]; 2150 2151 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 2152 break; 2153 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2154 next = (char *)fs + l; 2155 nbytes -= l; 2156 2157 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2158 (rulenum != fs->parent_nr && do_pipe == 1))) { 2159 continue; 2160 } 2161 2162 q = (struct dn_flow_queue *)(fs+1); 2163 sprintf(prefix, "q%05d: weight %d pipe %d ", 2164 fs->fs_nr, fs->weight, fs->parent_nr); 2165 print_flowset_parms(fs, prefix); 2166 list_queues(fs, q); 2167 } 2168 } 2169 2170 /* 2171 * This one handles all set-related commands 2172 * ipfw set { show | enable | disable } 2173 * ipfw set swap X Y 2174 * ipfw set move X to Y 2175 * ipfw set move rule X to Y 2176 */ 2177 static void 2178 sets_handler(int ac, char *av[]) 2179 { 2180 uint32_t set_disable, masks[2]; 2181 int i, nbytes; 2182 uint16_t rulenum; 2183 uint8_t cmd, new_set; 2184 2185 ac--; 2186 av++; 2187 2188 if (!ac) 2189 errx(EX_USAGE, "set needs command"); 2190 if (_substrcmp(*av, "show") == 0) { 2191 void *data; 2192 char const *msg; 2193 2194 nbytes = sizeof(struct ip_fw); 2195 if ((data = calloc(1, nbytes)) == NULL) 2196 err(EX_OSERR, "calloc"); 2197 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2198 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2199 bcopy(&((struct ip_fw *)data)->next_rule, 2200 &set_disable, sizeof(set_disable)); 2201 2202 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2203 if ((set_disable & (1<<i))) { 2204 printf("%s %d", msg, i); 2205 msg = ""; 2206 } 2207 msg = (set_disable) ? " enable" : "enable"; 2208 for (i = 0; i < RESVD_SET; i++) 2209 if (!(set_disable & (1<<i))) { 2210 printf("%s %d", msg, i); 2211 msg = ""; 2212 } 2213 printf("\n"); 2214 } else if (_substrcmp(*av, "swap") == 0) { 2215 ac--; av++; 2216 if (ac != 2) 2217 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2218 rulenum = atoi(av[0]); 2219 new_set = atoi(av[1]); 2220 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2221 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2222 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2223 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2224 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2225 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2226 } else if (_substrcmp(*av, "move") == 0) { 2227 ac--; av++; 2228 if (ac && _substrcmp(*av, "rule") == 0) { 2229 cmd = 2; 2230 ac--; av++; 2231 } else 2232 cmd = 3; 2233 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2234 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2235 rulenum = atoi(av[0]); 2236 new_set = atoi(av[2]); 2237 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2238 (cmd == 2 && rulenum == 65535) ) 2239 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2240 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2241 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2242 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2243 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2244 } else if (_substrcmp(*av, "disable") == 0 || 2245 _substrcmp(*av, "enable") == 0 ) { 2246 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2247 2248 ac--; av++; 2249 masks[0] = masks[1] = 0; 2250 2251 while (ac) { 2252 if (isdigit(**av)) { 2253 i = atoi(*av); 2254 if (i < 0 || i > RESVD_SET) 2255 errx(EX_DATAERR, 2256 "invalid set number %d\n", i); 2257 masks[which] |= (1<<i); 2258 } else if (_substrcmp(*av, "disable") == 0) 2259 which = 0; 2260 else if (_substrcmp(*av, "enable") == 0) 2261 which = 1; 2262 else 2263 errx(EX_DATAERR, 2264 "invalid set command %s\n", *av); 2265 av++; ac--; 2266 } 2267 if ( (masks[0] & masks[1]) != 0 ) 2268 errx(EX_DATAERR, 2269 "cannot enable and disable the same set\n"); 2270 2271 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2272 if (i) 2273 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2274 } else 2275 errx(EX_USAGE, "invalid set command %s\n", *av); 2276 } 2277 2278 static void 2279 sysctl_handler(int ac, char *av[], int which) 2280 { 2281 ac--; 2282 av++; 2283 2284 if (ac == 0) { 2285 warnx("missing keyword to enable/disable\n"); 2286 } else if (_substrcmp(*av, "firewall") == 0) { 2287 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2288 &which, sizeof(which)); 2289 } else if (_substrcmp(*av, "one_pass") == 0) { 2290 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2291 &which, sizeof(which)); 2292 } else if (_substrcmp(*av, "debug") == 0) { 2293 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2294 &which, sizeof(which)); 2295 } else if (_substrcmp(*av, "verbose") == 0) { 2296 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2297 &which, sizeof(which)); 2298 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2299 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2300 &which, sizeof(which)); 2301 } else if (_substrcmp(*av, "altq") == 0) { 2302 altq_set_enabled(which); 2303 } else { 2304 warnx("unrecognize enable/disable keyword: %s\n", *av); 2305 } 2306 } 2307 2308 static void 2309 list(int ac, char *av[], int show_counters) 2310 { 2311 struct ip_fw *r; 2312 ipfw_dyn_rule *dynrules, *d; 2313 2314 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2315 char *lim; 2316 void *data = NULL; 2317 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2318 int exitval = EX_OK; 2319 int lac; 2320 char **lav; 2321 u_long rnum, last; 2322 char *endptr; 2323 int seen = 0; 2324 2325 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2326 int nalloc = 1024; /* start somewhere... */ 2327 2328 last = 0; 2329 2330 if (test_only) { 2331 fprintf(stderr, "Testing only, list disabled\n"); 2332 return; 2333 } 2334 2335 ac--; 2336 av++; 2337 2338 /* get rules or pipes from kernel, resizing array as necessary */ 2339 nbytes = nalloc; 2340 2341 while (nbytes >= nalloc) { 2342 nalloc = nalloc * 2 + 200; 2343 nbytes = nalloc; 2344 if ((data = realloc(data, nbytes)) == NULL) 2345 err(EX_OSERR, "realloc"); 2346 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2347 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2348 do_pipe ? "DUMMYNET" : "FW"); 2349 } 2350 2351 if (do_pipe) { 2352 list_pipes(data, nbytes, ac, av); 2353 goto done; 2354 } 2355 2356 /* 2357 * Count static rules. They have variable size so we 2358 * need to scan the list to count them. 2359 */ 2360 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2361 r->rulenum < 65535 && (char *)r < lim; 2362 ++nstat, r = NEXT(r) ) 2363 ; /* nothing */ 2364 2365 /* 2366 * Count dynamic rules. This is easier as they have 2367 * fixed size. 2368 */ 2369 r = NEXT(r); 2370 dynrules = (ipfw_dyn_rule *)r ; 2371 n = (char *)r - (char *)data; 2372 ndyn = (nbytes - n) / sizeof *dynrules; 2373 2374 /* if showing stats, figure out column widths ahead of time */ 2375 bcwidth = pcwidth = 0; 2376 if (show_counters) { 2377 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2378 /* packet counter */ 2379 width = snprintf(NULL, 0, "%llu", 2380 align_uint64(&r->pcnt)); 2381 if (width > pcwidth) 2382 pcwidth = width; 2383 2384 /* byte counter */ 2385 width = snprintf(NULL, 0, "%llu", 2386 align_uint64(&r->bcnt)); 2387 if (width > bcwidth) 2388 bcwidth = width; 2389 } 2390 } 2391 if (do_dynamic && ndyn) { 2392 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2393 width = snprintf(NULL, 0, "%llu", 2394 align_uint64(&d->pcnt)); 2395 if (width > pcwidth) 2396 pcwidth = width; 2397 2398 width = snprintf(NULL, 0, "%llu", 2399 align_uint64(&d->bcnt)); 2400 if (width > bcwidth) 2401 bcwidth = width; 2402 } 2403 } 2404 /* if no rule numbers were specified, list all rules */ 2405 if (ac == 0) { 2406 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2407 show_ipfw(r, pcwidth, bcwidth); 2408 2409 if (do_dynamic && ndyn) { 2410 printf("## Dynamic rules (%d):\n", ndyn); 2411 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2412 show_dyn_ipfw(d, pcwidth, bcwidth); 2413 } 2414 goto done; 2415 } 2416 2417 /* display specific rules requested on command line */ 2418 2419 for (lac = ac, lav = av; lac != 0; lac--) { 2420 /* convert command line rule # */ 2421 last = rnum = strtoul(*lav++, &endptr, 10); 2422 if (*endptr == '-') 2423 last = strtoul(endptr+1, &endptr, 10); 2424 if (*endptr) { 2425 exitval = EX_USAGE; 2426 warnx("invalid rule number: %s", *(lav - 1)); 2427 continue; 2428 } 2429 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2430 if (r->rulenum > last) 2431 break; 2432 if (r->rulenum >= rnum && r->rulenum <= last) { 2433 show_ipfw(r, pcwidth, bcwidth); 2434 seen = 1; 2435 } 2436 } 2437 if (!seen) { 2438 /* give precedence to other error(s) */ 2439 if (exitval == EX_OK) 2440 exitval = EX_UNAVAILABLE; 2441 warnx("rule %lu does not exist", rnum); 2442 } 2443 } 2444 2445 if (do_dynamic && ndyn) { 2446 printf("## Dynamic rules:\n"); 2447 for (lac = ac, lav = av; lac != 0; lac--) { 2448 last = rnum = strtoul(*lav++, &endptr, 10); 2449 if (*endptr == '-') 2450 last = strtoul(endptr+1, &endptr, 10); 2451 if (*endptr) 2452 /* already warned */ 2453 continue; 2454 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2455 uint16_t rulenum; 2456 2457 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2458 if (rulenum > rnum) 2459 break; 2460 if (r->rulenum >= rnum && r->rulenum <= last) 2461 show_dyn_ipfw(d, pcwidth, bcwidth); 2462 } 2463 } 2464 } 2465 2466 ac = 0; 2467 2468 done: 2469 free(data); 2470 2471 if (exitval != EX_OK) 2472 exit(exitval); 2473 #undef NEXT 2474 } 2475 2476 static void 2477 show_usage(void) 2478 { 2479 fprintf(stderr, "usage: ipfw [options]\n" 2480 "do \"ipfw -h\" or see ipfw manpage for details\n" 2481 ); 2482 exit(EX_USAGE); 2483 } 2484 2485 static void 2486 help(void) 2487 { 2488 fprintf(stderr, 2489 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2490 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2491 "add [num] [set N] [prob x] RULE-BODY\n" 2492 "{pipe|queue} N config PIPE-BODY\n" 2493 "[pipe|queue] {zero|delete|show} [N{,N}]\n" 2494 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2495 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2496 "\n" 2497 "RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2498 "ACTION: check-state | allow | count | deny | unreach CODE | skipto N |\n" 2499 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 2500 "PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2501 "ADDR: [ MAC dst src ether_type ] \n" 2502 " [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2503 " [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2504 "IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2505 "IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2506 "IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2507 "IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2508 "OPTION_LIST: OPTION [OPTION_LIST]\n" 2509 "OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2510 " {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2511 " {dst-port|src-port} LIST |\n" 2512 " estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2513 " iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2514 " ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2515 " icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n" 2516 " mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2517 " setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2518 " tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2519 ); 2520 exit(0); 2521 } 2522 2523 2524 static int 2525 lookup_host (char *host, struct in_addr *ipaddr) 2526 { 2527 struct hostent *he; 2528 2529 if (!inet_aton(host, ipaddr)) { 2530 if ((he = gethostbyname(host)) == NULL) 2531 return(-1); 2532 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2533 } 2534 return(0); 2535 } 2536 2537 /* 2538 * fills the addr and mask fields in the instruction as appropriate from av. 2539 * Update length as appropriate. 2540 * The following formats are allowed: 2541 * me returns O_IP_*_ME 2542 * 1.2.3.4 single IP address 2543 * 1.2.3.4:5.6.7.8 address:mask 2544 * 1.2.3.4/24 address/mask 2545 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2546 * We can have multiple comma-separated address/mask entries. 2547 */ 2548 static void 2549 fill_ip(ipfw_insn_ip *cmd, char *av) 2550 { 2551 int len = 0; 2552 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2553 2554 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2555 2556 if (_substrcmp(av, "any") == 0) 2557 return; 2558 2559 if (_substrcmp(av, "me") == 0) { 2560 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2561 return; 2562 } 2563 2564 if (strncmp(av, "table(", 6) == 0) { 2565 char *p = strchr(av + 6, ','); 2566 2567 if (p) 2568 *p++ = '\0'; 2569 cmd->o.opcode = O_IP_DST_LOOKUP; 2570 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2571 if (p) { 2572 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2573 d[0] = strtoul(p, NULL, 0); 2574 } else 2575 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2576 return; 2577 } 2578 2579 while (av) { 2580 /* 2581 * After the address we can have '/' or ':' indicating a mask, 2582 * ',' indicating another address follows, '{' indicating a 2583 * set of addresses of unspecified size. 2584 */ 2585 char *p = strpbrk(av, "/:,{"); 2586 int masklen; 2587 char md; 2588 2589 if (p) { 2590 md = *p; 2591 *p++ = '\0'; 2592 } else 2593 md = '\0'; 2594 2595 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2596 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2597 switch (md) { 2598 case ':': 2599 if (!inet_aton(p, (struct in_addr *)&d[1])) 2600 errx(EX_DATAERR, "bad netmask ``%s''", p); 2601 break; 2602 case '/': 2603 masklen = atoi(p); 2604 if (masklen == 0) 2605 d[1] = htonl(0); /* mask */ 2606 else if (masklen > 32) 2607 errx(EX_DATAERR, "bad width ``%s''", p); 2608 else 2609 d[1] = htonl(~0 << (32 - masklen)); 2610 break; 2611 case '{': /* no mask, assume /24 and put back the '{' */ 2612 d[1] = htonl(~0 << (32 - 24)); 2613 *(--p) = md; 2614 break; 2615 2616 case ',': /* single address plus continuation */ 2617 *(--p) = md; 2618 /* FALLTHROUGH */ 2619 case 0: /* initialization value */ 2620 default: 2621 d[1] = htonl(~0); /* force /32 */ 2622 break; 2623 } 2624 d[0] &= d[1]; /* mask base address with mask */ 2625 /* find next separator */ 2626 if (p) 2627 p = strpbrk(p, ",{"); 2628 if (p && *p == '{') { 2629 /* 2630 * We have a set of addresses. They are stored as follows: 2631 * arg1 is the set size (powers of 2, 2..256) 2632 * addr is the base address IN HOST FORMAT 2633 * mask.. is an array of arg1 bits (rounded up to 2634 * the next multiple of 32) with bits set 2635 * for each host in the map. 2636 */ 2637 uint32_t *map = (uint32_t *)&cmd->mask; 2638 int low, high; 2639 int i = contigmask((uint8_t *)&(d[1]), 32); 2640 2641 if (len > 0) 2642 errx(EX_DATAERR, "address set cannot be in a list"); 2643 if (i < 24 || i > 31) 2644 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2645 cmd->o.arg1 = 1<<(32-i); /* map length */ 2646 d[0] = ntohl(d[0]); /* base addr in host format */ 2647 cmd->o.opcode = O_IP_DST_SET; /* default */ 2648 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2649 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2650 map[i] = 0; /* clear map */ 2651 2652 av = p + 1; 2653 low = d[0] & 0xff; 2654 high = low + cmd->o.arg1 - 1; 2655 /* 2656 * Here, i stores the previous value when we specify a range 2657 * of addresses within a mask, e.g. 45-63. i = -1 means we 2658 * have no previous value. 2659 */ 2660 i = -1; /* previous value in a range */ 2661 while (isdigit(*av)) { 2662 char *s; 2663 int a = strtol(av, &s, 0); 2664 2665 if (s == av) { /* no parameter */ 2666 if (*av != '}') 2667 errx(EX_DATAERR, "set not closed\n"); 2668 if (i != -1) 2669 errx(EX_DATAERR, "incomplete range %d-", i); 2670 break; 2671 } 2672 if (a < low || a > high) 2673 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2674 a, low, high); 2675 a -= low; 2676 if (i == -1) /* no previous in range */ 2677 i = a; 2678 else { /* check that range is valid */ 2679 if (i > a) 2680 errx(EX_DATAERR, "invalid range %d-%d", 2681 i+low, a+low); 2682 if (*s == '-') 2683 errx(EX_DATAERR, "double '-' in range"); 2684 } 2685 for (; i <= a; i++) 2686 map[i/32] |= 1<<(i & 31); 2687 i = -1; 2688 if (*s == '-') 2689 i = a; 2690 else if (*s == '}') 2691 break; 2692 av = s+1; 2693 } 2694 return; 2695 } 2696 av = p; 2697 if (av) /* then *av must be a ',' */ 2698 av++; 2699 2700 /* Check this entry */ 2701 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2702 /* 2703 * 'any' turns the entire list into a NOP. 2704 * 'not any' never matches, so it is removed from the 2705 * list unless it is the only item, in which case we 2706 * report an error. 2707 */ 2708 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2709 if (av == NULL && len == 0) /* only this entry */ 2710 errx(EX_DATAERR, "not any never matches"); 2711 } 2712 /* else do nothing and skip this entry */ 2713 return; 2714 } 2715 /* A single IP can be stored in an optimized format */ 2716 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2717 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2718 return; 2719 } 2720 len += 2; /* two words... */ 2721 d += 2; 2722 } /* end while */ 2723 cmd->o.len |= len+1; 2724 } 2725 2726 2727 /* Try to find ipv6 address by hostname */ 2728 static int 2729 lookup_host6 (char *host, struct in6_addr *ip6addr) 2730 { 2731 struct hostent *he; 2732 2733 if (!inet_pton(AF_INET6, host, ip6addr)) { 2734 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2735 return(-1); 2736 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2737 } 2738 return(0); 2739 } 2740 2741 2742 /* n2mask sets n bits of the mask */ 2743 static void 2744 n2mask(struct in6_addr *mask, int n) 2745 { 2746 static int minimask[9] = 2747 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2748 u_char *p; 2749 2750 memset(mask, 0, sizeof(struct in6_addr)); 2751 p = (u_char *) mask; 2752 for (; n > 0; p++, n -= 8) { 2753 if (n >= 8) 2754 *p = 0xff; 2755 else 2756 *p = minimask[n]; 2757 } 2758 return; 2759 } 2760 2761 2762 /* 2763 * fill the addr and mask fields in the instruction as appropriate from av. 2764 * Update length as appropriate. 2765 * The following formats are allowed: 2766 * any matches any IP6. Actually returns an empty instruction. 2767 * me returns O_IP6_*_ME 2768 * 2769 * 03f1::234:123:0342 single IP6 addres 2770 * 03f1::234:123:0342/24 address/mask 2771 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2772 * 2773 * Set of address (as in ipv6) not supported because ipv6 address 2774 * are typically random past the initial prefix. 2775 * Return 1 on success, 0 on failure. 2776 */ 2777 static int 2778 fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2779 { 2780 int len = 0; 2781 struct in6_addr *d = &(cmd->addr6); 2782 /* 2783 * Needed for multiple address. 2784 * Note d[1] points to struct in6_add r mask6 of cmd 2785 */ 2786 2787 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2788 2789 if (strcmp(av, "any") == 0) 2790 return (1); 2791 2792 2793 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2794 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2795 return (1); 2796 } 2797 2798 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2799 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2800 return (1); 2801 } 2802 2803 av = strdup(av); 2804 while (av) { 2805 /* 2806 * After the address we can have '/' indicating a mask, 2807 * or ',' indicating another address follows. 2808 */ 2809 2810 char *p; 2811 int masklen; 2812 char md = '\0'; 2813 2814 if ((p = strpbrk(av, "/,")) ) { 2815 md = *p; /* save the separator */ 2816 *p = '\0'; /* terminate address string */ 2817 p++; /* and skip past it */ 2818 } 2819 /* now p points to NULL, mask or next entry */ 2820 2821 /* lookup stores address in *d as a side effect */ 2822 if (lookup_host6(av, d) != 0) { 2823 /* XXX: failed. Free memory and go */ 2824 errx(EX_DATAERR, "bad address \"%s\"", av); 2825 } 2826 /* next, look at the mask, if any */ 2827 masklen = (md == '/') ? atoi(p) : 128; 2828 if (masklen > 128 || masklen < 0) 2829 errx(EX_DATAERR, "bad width \"%s\''", p); 2830 else 2831 n2mask(&d[1], masklen); 2832 2833 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2834 2835 /* find next separator */ 2836 2837 if (md == '/') { /* find separator past the mask */ 2838 p = strpbrk(p, ","); 2839 if (p != NULL) 2840 p++; 2841 } 2842 av = p; 2843 2844 /* Check this entry */ 2845 if (masklen == 0) { 2846 /* 2847 * 'any' turns the entire list into a NOP. 2848 * 'not any' never matches, so it is removed from the 2849 * list unless it is the only item, in which case we 2850 * report an error. 2851 */ 2852 if (cmd->o.len & F_NOT && av == NULL && len == 0) 2853 errx(EX_DATAERR, "not any never matches"); 2854 continue; 2855 } 2856 2857 /* 2858 * A single IP can be stored alone 2859 */ 2860 if (masklen == 128 && av == NULL && len == 0) { 2861 len = F_INSN_SIZE(struct in6_addr); 2862 break; 2863 } 2864 2865 /* Update length and pointer to arguments */ 2866 len += F_INSN_SIZE(struct in6_addr)*2; 2867 d += 2; 2868 } /* end while */ 2869 2870 /* 2871 * Total length of the command, remember that 1 is the size of 2872 * the base command. 2873 */ 2874 cmd->o.len |= len+1; 2875 free(av); 2876 return (1); 2877 } 2878 2879 /* 2880 * fills command for ipv6 flow-id filtering 2881 * note that the 20 bit flow number is stored in a array of u_int32_t 2882 * it's supported lists of flow-id, so in the o.arg1 we store how many 2883 * additional flow-id we want to filter, the basic is 1 2884 */ 2885 void 2886 fill_flow6( ipfw_insn_u32 *cmd, char *av ) 2887 { 2888 u_int32_t type; /* Current flow number */ 2889 u_int16_t nflow = 0; /* Current flow index */ 2890 char *s = av; 2891 cmd->d[0] = 0; /* Initializing the base number*/ 2892 2893 while (s) { 2894 av = strsep( &s, ",") ; 2895 type = strtoul(av, &av, 0); 2896 if (*av != ',' && *av != '\0') 2897 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2898 if (type > 0xfffff) 2899 errx(EX_DATAERR, "flow number out of range %s", av); 2900 cmd->d[nflow] |= type; 2901 nflow++; 2902 } 2903 if( nflow > 0 ) { 2904 cmd->o.opcode = O_FLOW6ID; 2905 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 2906 cmd->o.arg1 = nflow; 2907 } 2908 else { 2909 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2910 } 2911 } 2912 2913 static ipfw_insn * 2914 add_srcip6(ipfw_insn *cmd, char *av) 2915 { 2916 2917 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2918 if (F_LEN(cmd) == 0) /* any */ 2919 ; 2920 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2921 cmd->opcode = O_IP6_SRC_ME; 2922 } else if (F_LEN(cmd) == 2923 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2924 /* single IP, no mask*/ 2925 cmd->opcode = O_IP6_SRC; 2926 } else { /* addr/mask opt */ 2927 cmd->opcode = O_IP6_SRC_MASK; 2928 } 2929 return cmd; 2930 } 2931 2932 static ipfw_insn * 2933 add_dstip6(ipfw_insn *cmd, char *av) 2934 { 2935 2936 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2937 if (F_LEN(cmd) == 0) /* any */ 2938 ; 2939 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2940 cmd->opcode = O_IP6_DST_ME; 2941 } else if (F_LEN(cmd) == 2942 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2943 /* single IP, no mask*/ 2944 cmd->opcode = O_IP6_DST; 2945 } else { /* addr/mask opt */ 2946 cmd->opcode = O_IP6_DST_MASK; 2947 } 2948 return cmd; 2949 } 2950 2951 2952 /* 2953 * helper function to process a set of flags and set bits in the 2954 * appropriate masks. 2955 */ 2956 static void 2957 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2958 struct _s_x *flags, char *p) 2959 { 2960 uint8_t set=0, clear=0; 2961 2962 while (p && *p) { 2963 char *q; /* points to the separator */ 2964 int val; 2965 uint8_t *which; /* mask we are working on */ 2966 2967 if (*p == '!') { 2968 p++; 2969 which = &clear; 2970 } else 2971 which = &set; 2972 q = strchr(p, ','); 2973 if (q) 2974 *q++ = '\0'; 2975 val = match_token(flags, p); 2976 if (val <= 0) 2977 errx(EX_DATAERR, "invalid flag %s", p); 2978 *which |= (uint8_t)val; 2979 p = q; 2980 } 2981 cmd->opcode = opcode; 2982 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2983 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2984 } 2985 2986 2987 static void 2988 delete(int ac, char *av[]) 2989 { 2990 uint32_t rulenum; 2991 struct dn_pipe p; 2992 int i; 2993 int exitval = EX_OK; 2994 int do_set = 0; 2995 2996 memset(&p, 0, sizeof p); 2997 2998 av++; ac--; 2999 NEED1("missing rule specification"); 3000 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3001 do_set = 1; /* delete set */ 3002 ac--; av++; 3003 } 3004 3005 /* Rule number */ 3006 while (ac && isdigit(**av)) { 3007 i = atoi(*av); av++; ac--; 3008 if (do_pipe) { 3009 if (do_pipe == 1) 3010 p.pipe_nr = i; 3011 else 3012 p.fs.fs_nr = i; 3013 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3014 if (i) { 3015 exitval = 1; 3016 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3017 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3018 } 3019 } else { 3020 rulenum = (i & 0xffff) | (do_set << 24); 3021 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3022 if (i) { 3023 exitval = EX_UNAVAILABLE; 3024 warn("rule %u: setsockopt(IP_FW_DEL)", 3025 rulenum); 3026 } 3027 } 3028 } 3029 if (exitval != EX_OK) 3030 exit(exitval); 3031 } 3032 3033 3034 /* 3035 * fill the interface structure. We do not check the name as we can 3036 * create interfaces dynamically, so checking them at insert time 3037 * makes relatively little sense. 3038 * Interface names containing '*', '?', or '[' are assumed to be shell 3039 * patterns which match interfaces. 3040 */ 3041 static void 3042 fill_iface(ipfw_insn_if *cmd, char *arg) 3043 { 3044 cmd->name[0] = '\0'; 3045 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3046 3047 /* Parse the interface or address */ 3048 if (strcmp(arg, "any") == 0) 3049 cmd->o.len = 0; /* effectively ignore this command */ 3050 else if (!isdigit(*arg)) { 3051 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3052 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3053 } else if (!inet_aton(arg, &cmd->p.ip)) 3054 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3055 } 3056 3057 static void 3058 config_pipe(int ac, char **av) 3059 { 3060 struct dn_pipe p; 3061 int i; 3062 char *end; 3063 void *par = NULL; 3064 3065 memset(&p, 0, sizeof p); 3066 3067 av++; ac--; 3068 /* Pipe number */ 3069 if (ac && isdigit(**av)) { 3070 i = atoi(*av); av++; ac--; 3071 if (do_pipe == 1) 3072 p.pipe_nr = i; 3073 else 3074 p.fs.fs_nr = i; 3075 } 3076 while (ac > 0) { 3077 double d; 3078 int tok = match_token(dummynet_params, *av); 3079 ac--; av++; 3080 3081 switch(tok) { 3082 case TOK_NOERROR: 3083 p.fs.flags_fs |= DN_NOERROR; 3084 break; 3085 3086 case TOK_PLR: 3087 NEED1("plr needs argument 0..1\n"); 3088 d = strtod(av[0], NULL); 3089 if (d > 1) 3090 d = 1; 3091 else if (d < 0) 3092 d = 0; 3093 p.fs.plr = (int)(d*0x7fffffff); 3094 ac--; av++; 3095 break; 3096 3097 case TOK_QUEUE: 3098 NEED1("queue needs queue size\n"); 3099 end = NULL; 3100 p.fs.qsize = strtoul(av[0], &end, 0); 3101 if (*end == 'K' || *end == 'k') { 3102 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3103 p.fs.qsize *= 1024; 3104 } else if (*end == 'B' || 3105 _substrcmp2(end, "by", "bytes") == 0) { 3106 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3107 } 3108 ac--; av++; 3109 break; 3110 3111 case TOK_BUCKETS: 3112 NEED1("buckets needs argument\n"); 3113 p.fs.rq_size = strtoul(av[0], NULL, 0); 3114 ac--; av++; 3115 break; 3116 3117 case TOK_MASK: 3118 NEED1("mask needs mask specifier\n"); 3119 /* 3120 * per-flow queue, mask is dst_ip, dst_port, 3121 * src_ip, src_port, proto measured in bits 3122 */ 3123 par = NULL; 3124 3125 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 3126 end = NULL; 3127 3128 while (ac >= 1) { 3129 uint32_t *p32 = NULL; 3130 uint16_t *p16 = NULL; 3131 uint32_t *p20 = NULL; 3132 struct in6_addr *pa6 = NULL; 3133 uint32_t a; 3134 3135 tok = match_token(dummynet_params, *av); 3136 ac--; av++; 3137 switch(tok) { 3138 case TOK_ALL: 3139 /* 3140 * special case, all bits significant 3141 */ 3142 p.fs.flow_mask.dst_ip = ~0; 3143 p.fs.flow_mask.src_ip = ~0; 3144 p.fs.flow_mask.dst_port = ~0; 3145 p.fs.flow_mask.src_port = ~0; 3146 p.fs.flow_mask.proto = ~0; 3147 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 3148 n2mask(&(p.fs.flow_mask.src_ip6), 128); 3149 p.fs.flow_mask.flow_id6 = ~0; 3150 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3151 goto end_mask; 3152 3153 case TOK_DSTIP: 3154 p32 = &p.fs.flow_mask.dst_ip; 3155 break; 3156 3157 case TOK_SRCIP: 3158 p32 = &p.fs.flow_mask.src_ip; 3159 break; 3160 3161 case TOK_DSTIP6: 3162 pa6 = &(p.fs.flow_mask.dst_ip6); 3163 break; 3164 3165 case TOK_SRCIP6: 3166 pa6 = &(p.fs.flow_mask.src_ip6); 3167 break; 3168 3169 case TOK_FLOWID: 3170 p20 = &p.fs.flow_mask.flow_id6; 3171 break; 3172 3173 case TOK_DSTPORT: 3174 p16 = &p.fs.flow_mask.dst_port; 3175 break; 3176 3177 case TOK_SRCPORT: 3178 p16 = &p.fs.flow_mask.src_port; 3179 break; 3180 3181 case TOK_PROTO: 3182 break; 3183 3184 default: 3185 ac++; av--; /* backtrack */ 3186 goto end_mask; 3187 } 3188 if (ac < 1) 3189 errx(EX_USAGE, "mask: value missing"); 3190 if (*av[0] == '/') { 3191 a = strtoul(av[0]+1, &end, 0); 3192 if (pa6 == NULL) 3193 a = (a == 32) ? ~0 : (1 << a) - 1; 3194 } else 3195 a = strtoul(av[0], &end, 0); 3196 if (p32 != NULL) 3197 *p32 = a; 3198 else if (p16 != NULL) { 3199 if (a > 0xFFFF) 3200 errx(EX_DATAERR, 3201 "port mask must be 16 bit"); 3202 *p16 = (uint16_t)a; 3203 } else if (p20 != NULL) { 3204 if (a > 0xfffff) 3205 errx(EX_DATAERR, 3206 "flow_id mask must be 20 bit"); 3207 *p20 = (uint32_t)a; 3208 } else if (pa6 != NULL) { 3209 if (a < 0 || a > 128) 3210 errx(EX_DATAERR, 3211 "in6addr invalid mask len"); 3212 else 3213 n2mask(pa6, a); 3214 } else { 3215 if (a > 0xFF) 3216 errx(EX_DATAERR, 3217 "proto mask must be 8 bit"); 3218 p.fs.flow_mask.proto = (uint8_t)a; 3219 } 3220 if (a != 0) 3221 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3222 ac--; av++; 3223 } /* end while, config masks */ 3224 end_mask: 3225 break; 3226 3227 case TOK_RED: 3228 case TOK_GRED: 3229 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 3230 p.fs.flags_fs |= DN_IS_RED; 3231 if (tok == TOK_GRED) 3232 p.fs.flags_fs |= DN_IS_GENTLE_RED; 3233 /* 3234 * the format for parameters is w_q/min_th/max_th/max_p 3235 */ 3236 if ((end = strsep(&av[0], "/"))) { 3237 double w_q = strtod(end, NULL); 3238 if (w_q > 1 || w_q <= 0) 3239 errx(EX_DATAERR, "0 < w_q <= 1"); 3240 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 3241 } 3242 if ((end = strsep(&av[0], "/"))) { 3243 p.fs.min_th = strtoul(end, &end, 0); 3244 if (*end == 'K' || *end == 'k') 3245 p.fs.min_th *= 1024; 3246 } 3247 if ((end = strsep(&av[0], "/"))) { 3248 p.fs.max_th = strtoul(end, &end, 0); 3249 if (*end == 'K' || *end == 'k') 3250 p.fs.max_th *= 1024; 3251 } 3252 if ((end = strsep(&av[0], "/"))) { 3253 double max_p = strtod(end, NULL); 3254 if (max_p > 1 || max_p <= 0) 3255 errx(EX_DATAERR, "0 < max_p <= 1"); 3256 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 3257 } 3258 ac--; av++; 3259 break; 3260 3261 case TOK_DROPTAIL: 3262 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 3263 break; 3264 3265 case TOK_BW: 3266 NEED1("bw needs bandwidth or interface\n"); 3267 if (do_pipe != 1) 3268 errx(EX_DATAERR, "bandwidth only valid for pipes"); 3269 /* 3270 * set clocking interface or bandwidth value 3271 */ 3272 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 3273 int l = sizeof(p.if_name)-1; 3274 /* interface name */ 3275 strncpy(p.if_name, av[0], l); 3276 p.if_name[l] = '\0'; 3277 p.bandwidth = 0; 3278 } else { 3279 p.if_name[0] = '\0'; 3280 p.bandwidth = strtoul(av[0], &end, 0); 3281 if (*end == 'K' || *end == 'k') { 3282 end++; 3283 p.bandwidth *= 1000; 3284 } else if (*end == 'M') { 3285 end++; 3286 p.bandwidth *= 1000000; 3287 } 3288 if (*end == 'B' || 3289 _substrcmp2(end, "by", "bytes") == 0) 3290 p.bandwidth *= 8; 3291 if (p.bandwidth < 0) 3292 errx(EX_DATAERR, "bandwidth too large"); 3293 } 3294 ac--; av++; 3295 break; 3296 3297 case TOK_DELAY: 3298 if (do_pipe != 1) 3299 errx(EX_DATAERR, "delay only valid for pipes"); 3300 NEED1("delay needs argument 0..10000ms\n"); 3301 p.delay = strtoul(av[0], NULL, 0); 3302 ac--; av++; 3303 break; 3304 3305 case TOK_WEIGHT: 3306 if (do_pipe == 1) 3307 errx(EX_DATAERR,"weight only valid for queues"); 3308 NEED1("weight needs argument 0..100\n"); 3309 p.fs.weight = strtoul(av[0], &end, 0); 3310 ac--; av++; 3311 break; 3312 3313 case TOK_PIPE: 3314 if (do_pipe == 1) 3315 errx(EX_DATAERR,"pipe only valid for queues"); 3316 NEED1("pipe needs pipe_number\n"); 3317 p.fs.parent_nr = strtoul(av[0], &end, 0); 3318 ac--; av++; 3319 break; 3320 3321 default: 3322 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3323 } 3324 } 3325 if (do_pipe == 1) { 3326 if (p.pipe_nr == 0) 3327 errx(EX_DATAERR, "pipe_nr must be > 0"); 3328 if (p.delay > 10000) 3329 errx(EX_DATAERR, "delay must be < 10000"); 3330 } else { /* do_pipe == 2, queue */ 3331 if (p.fs.parent_nr == 0) 3332 errx(EX_DATAERR, "pipe must be > 0"); 3333 if (p.fs.weight >100) 3334 errx(EX_DATAERR, "weight must be <= 100"); 3335 } 3336 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 3337 if (p.fs.qsize > 1024*1024) 3338 errx(EX_DATAERR, "queue size must be < 1MB"); 3339 } else { 3340 if (p.fs.qsize > 100) 3341 errx(EX_DATAERR, "2 <= queue size <= 100"); 3342 } 3343 if (p.fs.flags_fs & DN_IS_RED) { 3344 size_t len; 3345 int lookup_depth, avg_pkt_size; 3346 double s, idle, weight, w_q; 3347 struct clockinfo ck; 3348 int t; 3349 3350 if (p.fs.min_th >= p.fs.max_th) 3351 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 3352 p.fs.min_th, p.fs.max_th); 3353 if (p.fs.max_th == 0) 3354 errx(EX_DATAERR, "max_th must be > 0"); 3355 3356 len = sizeof(int); 3357 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 3358 &lookup_depth, &len, NULL, 0) == -1) 3359 3360 errx(1, "sysctlbyname(\"%s\")", 3361 "net.inet.ip.dummynet.red_lookup_depth"); 3362 if (lookup_depth == 0) 3363 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 3364 " must be greater than zero"); 3365 3366 len = sizeof(int); 3367 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 3368 &avg_pkt_size, &len, NULL, 0) == -1) 3369 3370 errx(1, "sysctlbyname(\"%s\")", 3371 "net.inet.ip.dummynet.red_avg_pkt_size"); 3372 if (avg_pkt_size == 0) 3373 errx(EX_DATAERR, 3374 "net.inet.ip.dummynet.red_avg_pkt_size must" 3375 " be greater than zero"); 3376 3377 len = sizeof(struct clockinfo); 3378 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 3379 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 3380 3381 /* 3382 * Ticks needed for sending a medium-sized packet. 3383 * Unfortunately, when we are configuring a WF2Q+ queue, we 3384 * do not have bandwidth information, because that is stored 3385 * in the parent pipe, and also we have multiple queues 3386 * competing for it. So we set s=0, which is not very 3387 * correct. But on the other hand, why do we want RED with 3388 * WF2Q+ ? 3389 */ 3390 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 3391 s = 0; 3392 else 3393 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 3394 3395 /* 3396 * max idle time (in ticks) before avg queue size becomes 0. 3397 * NOTA: (3/w_q) is approx the value x so that 3398 * (1-w_q)^x < 10^-3. 3399 */ 3400 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 3401 idle = s * 3. / w_q; 3402 p.fs.lookup_step = (int)idle / lookup_depth; 3403 if (!p.fs.lookup_step) 3404 p.fs.lookup_step = 1; 3405 weight = 1 - w_q; 3406 for (t = p.fs.lookup_step; t > 0; --t) 3407 weight *= weight; 3408 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 3409 } 3410 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 3411 if (i) 3412 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 3413 } 3414 3415 static void 3416 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 3417 { 3418 int i, l; 3419 3420 for (i=0; i<6; i++) 3421 addr[i] = mask[i] = 0; 3422 if (strcmp(p, "any") == 0) 3423 return; 3424 3425 for (i=0; *p && i<6;i++, p++) { 3426 addr[i] = strtol(p, &p, 16); 3427 if (*p != ':') /* we start with the mask */ 3428 break; 3429 } 3430 if (*p == '/') { /* mask len */ 3431 l = strtol(p+1, &p, 0); 3432 for (i=0; l>0; l -=8, i++) 3433 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 3434 } else if (*p == '&') { /* mask */ 3435 for (i=0, p++; *p && i<6;i++, p++) { 3436 mask[i] = strtol(p, &p, 16); 3437 if (*p != ':') 3438 break; 3439 } 3440 } else if (*p == '\0') { 3441 for (i=0; i<6; i++) 3442 mask[i] = 0xff; 3443 } 3444 for (i=0; i<6; i++) 3445 addr[i] &= mask[i]; 3446 } 3447 3448 /* 3449 * helper function, updates the pointer to cmd with the length 3450 * of the current command, and also cleans up the first word of 3451 * the new command in case it has been clobbered before. 3452 */ 3453 static ipfw_insn * 3454 next_cmd(ipfw_insn *cmd) 3455 { 3456 cmd += F_LEN(cmd); 3457 bzero(cmd, sizeof(*cmd)); 3458 return cmd; 3459 } 3460 3461 /* 3462 * Takes arguments and copies them into a comment 3463 */ 3464 static void 3465 fill_comment(ipfw_insn *cmd, int ac, char **av) 3466 { 3467 int i, l; 3468 char *p = (char *)(cmd + 1); 3469 3470 cmd->opcode = O_NOP; 3471 cmd->len = (cmd->len & (F_NOT | F_OR)); 3472 3473 /* Compute length of comment string. */ 3474 for (i = 0, l = 0; i < ac; i++) 3475 l += strlen(av[i]) + 1; 3476 if (l == 0) 3477 return; 3478 if (l > 84) 3479 errx(EX_DATAERR, 3480 "comment too long (max 80 chars)"); 3481 l = 1 + (l+3)/4; 3482 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3483 for (i = 0; i < ac; i++) { 3484 strcpy(p, av[i]); 3485 p += strlen(av[i]); 3486 *p++ = ' '; 3487 } 3488 *(--p) = '\0'; 3489 } 3490 3491 /* 3492 * A function to fill simple commands of size 1. 3493 * Existing flags are preserved. 3494 */ 3495 static void 3496 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3497 { 3498 cmd->opcode = opcode; 3499 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3500 cmd->arg1 = arg; 3501 } 3502 3503 /* 3504 * Fetch and add the MAC address and type, with masks. This generates one or 3505 * two microinstructions, and returns the pointer to the last one. 3506 */ 3507 static ipfw_insn * 3508 add_mac(ipfw_insn *cmd, int ac, char *av[]) 3509 { 3510 ipfw_insn_mac *mac; 3511 3512 if (ac < 2) 3513 errx(EX_DATAERR, "MAC dst src"); 3514 3515 cmd->opcode = O_MACADDR2; 3516 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3517 3518 mac = (ipfw_insn_mac *)cmd; 3519 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3520 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 3521 return cmd; 3522 } 3523 3524 static ipfw_insn * 3525 add_mactype(ipfw_insn *cmd, int ac, char *av) 3526 { 3527 if (ac < 1) 3528 errx(EX_DATAERR, "missing MAC type"); 3529 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3530 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 3531 cmd->opcode = O_MAC_TYPE; 3532 return cmd; 3533 } else 3534 return NULL; 3535 } 3536 3537 static ipfw_insn * 3538 add_proto(ipfw_insn *cmd, char *av, u_char *proto) 3539 { 3540 struct protoent *pe; 3541 3542 *proto = IPPROTO_IP; 3543 3544 if (_substrcmp(av, "all") == 0) 3545 ; /* do not set O_IP4 nor O_IP6 */ 3546 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3547 /* explicit "just IPv4" rule */ 3548 fill_cmd(cmd, O_IP4, 0, 0); 3549 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3550 /* explicit "just IPv6" rule */ 3551 *proto = IPPROTO_IPV6; 3552 fill_cmd(cmd, O_IP6, 0, 0); 3553 } else if ((*proto = atoi(av)) > 0) 3554 ; /* all done! */ 3555 else if ((pe = getprotobyname(av)) != NULL) 3556 *proto = pe->p_proto; 3557 else 3558 return NULL; 3559 if (*proto != IPPROTO_IP && *proto != IPPROTO_IPV6) 3560 fill_cmd(cmd, O_PROTO, 0, *proto); 3561 3562 return cmd; 3563 } 3564 3565 static ipfw_insn * 3566 add_srcip(ipfw_insn *cmd, char *av) 3567 { 3568 fill_ip((ipfw_insn_ip *)cmd, av); 3569 if (cmd->opcode == O_IP_DST_SET) /* set */ 3570 cmd->opcode = O_IP_SRC_SET; 3571 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3572 cmd->opcode = O_IP_SRC_LOOKUP; 3573 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3574 cmd->opcode = O_IP_SRC_ME; 3575 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3576 cmd->opcode = O_IP_SRC; 3577 else /* addr/mask */ 3578 cmd->opcode = O_IP_SRC_MASK; 3579 return cmd; 3580 } 3581 3582 static ipfw_insn * 3583 add_dstip(ipfw_insn *cmd, char *av) 3584 { 3585 fill_ip((ipfw_insn_ip *)cmd, av); 3586 if (cmd->opcode == O_IP_DST_SET) /* set */ 3587 ; 3588 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3589 ; 3590 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3591 cmd->opcode = O_IP_DST_ME; 3592 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3593 cmd->opcode = O_IP_DST; 3594 else /* addr/mask */ 3595 cmd->opcode = O_IP_DST_MASK; 3596 return cmd; 3597 } 3598 3599 static ipfw_insn * 3600 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 3601 { 3602 if (_substrcmp(av, "any") == 0) { 3603 return NULL; 3604 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 3605 /* XXX todo: check that we have a protocol with ports */ 3606 cmd->opcode = opcode; 3607 return cmd; 3608 } 3609 return NULL; 3610 } 3611 3612 static ipfw_insn * 3613 add_src(ipfw_insn *cmd, char *av, u_char proto) 3614 { 3615 struct in6_addr a; 3616 3617 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3618 inet_pton(AF_INET6, av, &a)) 3619 return add_srcip6(cmd, av); 3620 /* XXX: should check for IPv4, not !IPv6 */ 3621 if (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3622 !inet_pton(AF_INET6, av, &a)) 3623 return add_srcip(cmd, av); 3624 if (strcmp(av, "any") != 0) 3625 return cmd; 3626 3627 return NULL; 3628 } 3629 3630 static ipfw_insn * 3631 add_dst(ipfw_insn *cmd, char *av, u_char proto) 3632 { 3633 struct in6_addr a; 3634 3635 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3636 inet_pton(AF_INET6, av, &a)) 3637 return add_dstip6(cmd, av); 3638 /* XXX: should check for IPv4, not !IPv6 */ 3639 if (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3640 !inet_pton(AF_INET6, av, &a)) 3641 return add_dstip(cmd, av); 3642 if (strcmp(av, "any") != 0) 3643 return cmd; 3644 3645 return NULL; 3646 } 3647 3648 /* 3649 * Parse arguments and assemble the microinstructions which make up a rule. 3650 * Rules are added into the 'rulebuf' and then copied in the correct order 3651 * into the actual rule. 3652 * 3653 * The syntax for a rule starts with the action, followed by 3654 * optional action parameters, and the various match patterns. 3655 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3656 * (generated if the rule includes a keep-state option), then the 3657 * various match patterns, log/altq actions, and the actual action. 3658 * 3659 */ 3660 static void 3661 add(int ac, char *av[]) 3662 { 3663 /* 3664 * rules are added into the 'rulebuf' and then copied in 3665 * the correct order into the actual rule. 3666 * Some things that need to go out of order (prob, action etc.) 3667 * go into actbuf[]. 3668 */ 3669 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3670 3671 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3672 ipfw_insn *first_cmd; /* first match pattern */ 3673 3674 struct ip_fw *rule; 3675 3676 /* 3677 * various flags used to record that we entered some fields. 3678 */ 3679 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3680 ipfw_insn *have_log = NULL, *have_altq = NULL; 3681 size_t len; 3682 3683 int i; 3684 3685 int open_par = 0; /* open parenthesis ( */ 3686 3687 /* proto is here because it is used to fetch ports */ 3688 u_char proto = IPPROTO_IP; /* default protocol */ 3689 3690 double match_prob = 1; /* match probability, default is always match */ 3691 3692 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3693 bzero(cmdbuf, sizeof(cmdbuf)); 3694 bzero(rulebuf, sizeof(rulebuf)); 3695 3696 rule = (struct ip_fw *)rulebuf; 3697 cmd = (ipfw_insn *)cmdbuf; 3698 action = (ipfw_insn *)actbuf; 3699 3700 av++; ac--; 3701 3702 /* [rule N] -- Rule number optional */ 3703 if (ac && isdigit(**av)) { 3704 rule->rulenum = atoi(*av); 3705 av++; 3706 ac--; 3707 } 3708 3709 /* [set N] -- set number (0..RESVD_SET), optional */ 3710 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3711 int set = strtoul(av[1], NULL, 10); 3712 if (set < 0 || set > RESVD_SET) 3713 errx(EX_DATAERR, "illegal set %s", av[1]); 3714 rule->set = set; 3715 av += 2; ac -= 2; 3716 } 3717 3718 /* [prob D] -- match probability, optional */ 3719 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3720 match_prob = strtod(av[1], NULL); 3721 3722 if (match_prob <= 0 || match_prob > 1) 3723 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3724 av += 2; ac -= 2; 3725 } 3726 3727 /* action -- mandatory */ 3728 NEED1("missing action"); 3729 i = match_token(rule_actions, *av); 3730 ac--; av++; 3731 action->len = 1; /* default */ 3732 switch(i) { 3733 case TOK_CHECKSTATE: 3734 have_state = action; 3735 action->opcode = O_CHECK_STATE; 3736 break; 3737 3738 case TOK_ACCEPT: 3739 action->opcode = O_ACCEPT; 3740 break; 3741 3742 case TOK_DENY: 3743 action->opcode = O_DENY; 3744 action->arg1 = 0; 3745 break; 3746 3747 case TOK_REJECT: 3748 action->opcode = O_REJECT; 3749 action->arg1 = ICMP_UNREACH_HOST; 3750 break; 3751 3752 case TOK_RESET: 3753 action->opcode = O_REJECT; 3754 action->arg1 = ICMP_REJECT_RST; 3755 break; 3756 3757 case TOK_UNREACH: 3758 action->opcode = O_REJECT; 3759 NEED1("missing reject code"); 3760 fill_reject_code(&action->arg1, *av); 3761 ac--; av++; 3762 break; 3763 3764 case TOK_COUNT: 3765 action->opcode = O_COUNT; 3766 break; 3767 3768 case TOK_QUEUE: 3769 case TOK_PIPE: 3770 action->len = F_INSN_SIZE(ipfw_insn_pipe); 3771 case TOK_SKIPTO: 3772 if (i == TOK_QUEUE) 3773 action->opcode = O_QUEUE; 3774 else if (i == TOK_PIPE) 3775 action->opcode = O_PIPE; 3776 else if (i == TOK_SKIPTO) 3777 action->opcode = O_SKIPTO; 3778 NEED1("missing skipto/pipe/queue number"); 3779 action->arg1 = strtoul(*av, NULL, 10); 3780 av++; ac--; 3781 break; 3782 3783 case TOK_DIVERT: 3784 case TOK_TEE: 3785 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 3786 NEED1("missing divert/tee port"); 3787 action->arg1 = strtoul(*av, NULL, 0); 3788 if (action->arg1 == 0) { 3789 struct servent *s; 3790 setservent(1); 3791 s = getservbyname(av[0], "divert"); 3792 if (s != NULL) 3793 action->arg1 = ntohs(s->s_port); 3794 else 3795 errx(EX_DATAERR, "illegal divert/tee port"); 3796 } 3797 ac--; av++; 3798 break; 3799 3800 case TOK_NETGRAPH: 3801 case TOK_NGTEE: 3802 action->opcode = (i == TOK_NETGRAPH ) ? O_NETGRAPH : O_NGTEE; 3803 NEED1("missing netgraph cookie"); 3804 action->arg1 = strtoul(*av, NULL, 0); 3805 if (action->arg1 == 0) 3806 errx(EX_DATAERR, "illegal netgraph cookie"); 3807 ac--; av++; 3808 break; 3809 3810 case TOK_FORWARD: { 3811 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3812 char *s, *end; 3813 3814 NEED1("missing forward address[:port]"); 3815 3816 action->opcode = O_FORWARD_IP; 3817 action->len = F_INSN_SIZE(ipfw_insn_sa); 3818 3819 p->sa.sin_len = sizeof(struct sockaddr_in); 3820 p->sa.sin_family = AF_INET; 3821 p->sa.sin_port = 0; 3822 /* 3823 * locate the address-port separator (':' or ',') 3824 */ 3825 s = strchr(*av, ':'); 3826 if (s == NULL) 3827 s = strchr(*av, ','); 3828 if (s != NULL) { 3829 *(s++) = '\0'; 3830 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3831 if (s == end) 3832 errx(EX_DATAERR, 3833 "illegal forwarding port ``%s''", s); 3834 p->sa.sin_port = (u_short)i; 3835 } 3836 lookup_host(*av, &(p->sa.sin_addr)); 3837 } 3838 ac--; av++; 3839 break; 3840 3841 case TOK_COMMENT: 3842 /* pretend it is a 'count' rule followed by the comment */ 3843 action->opcode = O_COUNT; 3844 ac++; av--; /* go back... */ 3845 break; 3846 3847 default: 3848 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 3849 } 3850 action = next_cmd(action); 3851 3852 /* 3853 * [altq queuename] -- altq tag, optional 3854 * [log [logamount N]] -- log, optional 3855 * 3856 * If they exist, it go first in the cmdbuf, but then it is 3857 * skipped in the copy section to the end of the buffer. 3858 */ 3859 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 3860 ac--; av++; 3861 switch (i) { 3862 case TOK_LOG: 3863 { 3864 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 3865 int l; 3866 3867 if (have_log) 3868 errx(EX_DATAERR, 3869 "log cannot be specified more than once"); 3870 have_log = (ipfw_insn *)c; 3871 cmd->len = F_INSN_SIZE(ipfw_insn_log); 3872 cmd->opcode = O_LOG; 3873 if (ac && _substrcmp(*av, "logamount") == 0) { 3874 ac--; av++; 3875 NEED1("logamount requires argument"); 3876 l = atoi(*av); 3877 if (l < 0) 3878 errx(EX_DATAERR, 3879 "logamount must be positive"); 3880 c->max_log = l; 3881 ac--; av++; 3882 } else { 3883 len = sizeof(c->max_log); 3884 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 3885 &c->max_log, &len, NULL, 0) == -1) 3886 errx(1, "sysctlbyname(\"%s\")", 3887 "net.inet.ip.fw.verbose_limit"); 3888 } 3889 } 3890 break; 3891 3892 case TOK_ALTQ: 3893 { 3894 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 3895 3896 NEED1("missing altq queue name"); 3897 if (have_altq) 3898 errx(EX_DATAERR, 3899 "altq cannot be specified more than once"); 3900 have_altq = (ipfw_insn *)a; 3901 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 3902 cmd->opcode = O_ALTQ; 3903 fill_altq_qid(&a->qid, *av); 3904 ac--; av++; 3905 } 3906 break; 3907 3908 default: 3909 abort(); 3910 } 3911 cmd = next_cmd(cmd); 3912 } 3913 3914 if (have_state) /* must be a check-state, we are done */ 3915 goto done; 3916 3917 #define OR_START(target) \ 3918 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 3919 if (open_par) \ 3920 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 3921 prev = NULL; \ 3922 open_par = 1; \ 3923 if ( (av[0])[1] == '\0') { \ 3924 ac--; av++; \ 3925 } else \ 3926 (*av)++; \ 3927 } \ 3928 target: \ 3929 3930 3931 #define CLOSE_PAR \ 3932 if (open_par) { \ 3933 if (ac && ( \ 3934 strcmp(*av, ")") == 0 || \ 3935 strcmp(*av, "}") == 0)) { \ 3936 prev = NULL; \ 3937 open_par = 0; \ 3938 ac--; av++; \ 3939 } else \ 3940 errx(EX_USAGE, "missing \")\"\n"); \ 3941 } 3942 3943 #define NOT_BLOCK \ 3944 if (ac && _substrcmp(*av, "not") == 0) { \ 3945 if (cmd->len & F_NOT) \ 3946 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 3947 cmd->len |= F_NOT; \ 3948 ac--; av++; \ 3949 } 3950 3951 #define OR_BLOCK(target) \ 3952 if (ac && _substrcmp(*av, "or") == 0) { \ 3953 if (prev == NULL || open_par == 0) \ 3954 errx(EX_DATAERR, "invalid OR block"); \ 3955 prev->len |= F_OR; \ 3956 ac--; av++; \ 3957 goto target; \ 3958 } \ 3959 CLOSE_PAR; 3960 3961 first_cmd = cmd; 3962 3963 #if 0 3964 /* 3965 * MAC addresses, optional. 3966 * If we have this, we skip the part "proto from src to dst" 3967 * and jump straight to the option parsing. 3968 */ 3969 NOT_BLOCK; 3970 NEED1("missing protocol"); 3971 if (_substrcmp(*av, "MAC") == 0 || 3972 _substrcmp(*av, "mac") == 0) { 3973 ac--; av++; /* the "MAC" keyword */ 3974 add_mac(cmd, ac, av); /* exits in case of errors */ 3975 cmd = next_cmd(cmd); 3976 ac -= 2; av += 2; /* dst-mac and src-mac */ 3977 NOT_BLOCK; 3978 NEED1("missing mac type"); 3979 if (add_mactype(cmd, ac, av[0])) 3980 cmd = next_cmd(cmd); 3981 ac--; av++; /* any or mac-type */ 3982 goto read_options; 3983 } 3984 #endif 3985 3986 /* 3987 * protocol, mandatory 3988 */ 3989 OR_START(get_proto); 3990 NOT_BLOCK; 3991 NEED1("missing protocol"); 3992 if (add_proto(cmd, *av, &proto)) { 3993 av++; ac--; 3994 if (F_LEN(cmd) == 0) /* plain IP */ 3995 proto = 0; 3996 else { 3997 proto = cmd->arg1; 3998 prev = cmd; 3999 cmd = next_cmd(cmd); 4000 } 4001 } else if (first_cmd != cmd) { 4002 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4003 } else 4004 goto read_options; 4005 OR_BLOCK(get_proto); 4006 4007 /* 4008 * "from", mandatory 4009 */ 4010 if (!ac || _substrcmp(*av, "from") != 0) 4011 errx(EX_USAGE, "missing ``from''"); 4012 ac--; av++; 4013 4014 /* 4015 * source IP, mandatory 4016 */ 4017 OR_START(source_ip); 4018 NOT_BLOCK; /* optional "not" */ 4019 NEED1("missing source address"); 4020 if (add_src(cmd, *av, proto)) { 4021 ac--; av++; 4022 if (F_LEN(cmd) != 0) { /* ! any */ 4023 prev = cmd; 4024 cmd = next_cmd(cmd); 4025 } 4026 } else 4027 errx(EX_USAGE, "bad source address %s", *av); 4028 OR_BLOCK(source_ip); 4029 4030 /* 4031 * source ports, optional 4032 */ 4033 NOT_BLOCK; /* optional "not" */ 4034 if (ac) { 4035 if (_substrcmp(*av, "any") == 0 || 4036 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4037 ac--; av++; 4038 if (F_LEN(cmd) != 0) 4039 cmd = next_cmd(cmd); 4040 } 4041 } 4042 4043 /* 4044 * "to", mandatory 4045 */ 4046 if (!ac || _substrcmp(*av, "to") != 0) 4047 errx(EX_USAGE, "missing ``to''"); 4048 av++; ac--; 4049 4050 /* 4051 * destination, mandatory 4052 */ 4053 OR_START(dest_ip); 4054 NOT_BLOCK; /* optional "not" */ 4055 NEED1("missing dst address"); 4056 if (add_dst(cmd, *av, proto)) { 4057 ac--; av++; 4058 if (F_LEN(cmd) != 0) { /* ! any */ 4059 prev = cmd; 4060 cmd = next_cmd(cmd); 4061 } 4062 } else 4063 errx( EX_USAGE, "bad destination address %s", *av); 4064 OR_BLOCK(dest_ip); 4065 4066 /* 4067 * dest. ports, optional 4068 */ 4069 NOT_BLOCK; /* optional "not" */ 4070 if (ac) { 4071 if (_substrcmp(*av, "any") == 0 || 4072 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4073 ac--; av++; 4074 if (F_LEN(cmd) != 0) 4075 cmd = next_cmd(cmd); 4076 } 4077 } 4078 4079 read_options: 4080 if (ac && first_cmd == cmd) { 4081 /* 4082 * nothing specified so far, store in the rule to ease 4083 * printout later. 4084 */ 4085 rule->_pad = 1; 4086 } 4087 prev = NULL; 4088 while (ac) { 4089 char *s; 4090 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4091 4092 s = *av; 4093 cmd32 = (ipfw_insn_u32 *)cmd; 4094 4095 if (*s == '!') { /* alternate syntax for NOT */ 4096 if (cmd->len & F_NOT) 4097 errx(EX_USAGE, "double \"not\" not allowed\n"); 4098 cmd->len = F_NOT; 4099 s++; 4100 } 4101 i = match_token(rule_options, s); 4102 ac--; av++; 4103 switch(i) { 4104 case TOK_NOT: 4105 if (cmd->len & F_NOT) 4106 errx(EX_USAGE, "double \"not\" not allowed\n"); 4107 cmd->len = F_NOT; 4108 break; 4109 4110 case TOK_OR: 4111 if (open_par == 0 || prev == NULL) 4112 errx(EX_USAGE, "invalid \"or\" block\n"); 4113 prev->len |= F_OR; 4114 break; 4115 4116 case TOK_STARTBRACE: 4117 if (open_par) 4118 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4119 open_par = 1; 4120 break; 4121 4122 case TOK_ENDBRACE: 4123 if (!open_par) 4124 errx(EX_USAGE, "+missing \")\"\n"); 4125 open_par = 0; 4126 prev = NULL; 4127 break; 4128 4129 case TOK_IN: 4130 fill_cmd(cmd, O_IN, 0, 0); 4131 break; 4132 4133 case TOK_OUT: 4134 cmd->len ^= F_NOT; /* toggle F_NOT */ 4135 fill_cmd(cmd, O_IN, 0, 0); 4136 break; 4137 4138 case TOK_DIVERTED: 4139 fill_cmd(cmd, O_DIVERTED, 0, 3); 4140 break; 4141 4142 case TOK_DIVERTEDLOOPBACK: 4143 fill_cmd(cmd, O_DIVERTED, 0, 1); 4144 break; 4145 4146 case TOK_DIVERTEDOUTPUT: 4147 fill_cmd(cmd, O_DIVERTED, 0, 2); 4148 break; 4149 4150 case TOK_FRAG: 4151 fill_cmd(cmd, O_FRAG, 0, 0); 4152 break; 4153 4154 case TOK_LAYER2: 4155 fill_cmd(cmd, O_LAYER2, 0, 0); 4156 break; 4157 4158 case TOK_XMIT: 4159 case TOK_RECV: 4160 case TOK_VIA: 4161 NEED1("recv, xmit, via require interface name" 4162 " or address"); 4163 fill_iface((ipfw_insn_if *)cmd, av[0]); 4164 ac--; av++; 4165 if (F_LEN(cmd) == 0) /* not a valid address */ 4166 break; 4167 if (i == TOK_XMIT) 4168 cmd->opcode = O_XMIT; 4169 else if (i == TOK_RECV) 4170 cmd->opcode = O_RECV; 4171 else if (i == TOK_VIA) 4172 cmd->opcode = O_VIA; 4173 break; 4174 4175 case TOK_ICMPTYPES: 4176 NEED1("icmptypes requires list of types"); 4177 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4178 av++; ac--; 4179 break; 4180 4181 case TOK_ICMP6TYPES: 4182 NEED1("icmptypes requires list of types"); 4183 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 4184 av++; ac--; 4185 break; 4186 4187 case TOK_IPTTL: 4188 NEED1("ipttl requires TTL"); 4189 if (strpbrk(*av, "-,")) { 4190 if (!add_ports(cmd, *av, 0, O_IPTTL)) 4191 errx(EX_DATAERR, "invalid ipttl %s", *av); 4192 } else 4193 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4194 ac--; av++; 4195 break; 4196 4197 case TOK_IPID: 4198 NEED1("ipid requires id"); 4199 if (strpbrk(*av, "-,")) { 4200 if (!add_ports(cmd, *av, 0, O_IPID)) 4201 errx(EX_DATAERR, "invalid ipid %s", *av); 4202 } else 4203 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4204 ac--; av++; 4205 break; 4206 4207 case TOK_IPLEN: 4208 NEED1("iplen requires length"); 4209 if (strpbrk(*av, "-,")) { 4210 if (!add_ports(cmd, *av, 0, O_IPLEN)) 4211 errx(EX_DATAERR, "invalid ip len %s", *av); 4212 } else 4213 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4214 ac--; av++; 4215 break; 4216 4217 case TOK_IPVER: 4218 NEED1("ipver requires version"); 4219 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4220 ac--; av++; 4221 break; 4222 4223 case TOK_IPPRECEDENCE: 4224 NEED1("ipprecedence requires value"); 4225 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4226 (strtoul(*av, NULL, 0) & 7) << 5); 4227 ac--; av++; 4228 break; 4229 4230 case TOK_IPOPTS: 4231 NEED1("missing argument for ipoptions"); 4232 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 4233 ac--; av++; 4234 break; 4235 4236 case TOK_IPTOS: 4237 NEED1("missing argument for iptos"); 4238 fill_flags(cmd, O_IPTOS, f_iptos, *av); 4239 ac--; av++; 4240 break; 4241 4242 case TOK_UID: 4243 NEED1("uid requires argument"); 4244 { 4245 char *end; 4246 uid_t uid; 4247 struct passwd *pwd; 4248 4249 cmd->opcode = O_UID; 4250 uid = strtoul(*av, &end, 0); 4251 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4252 if (pwd == NULL) 4253 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4254 cmd32->d[0] = pwd->pw_uid; 4255 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4256 ac--; av++; 4257 } 4258 break; 4259 4260 case TOK_GID: 4261 NEED1("gid requires argument"); 4262 { 4263 char *end; 4264 gid_t gid; 4265 struct group *grp; 4266 4267 cmd->opcode = O_GID; 4268 gid = strtoul(*av, &end, 0); 4269 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4270 if (grp == NULL) 4271 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4272 cmd32->d[0] = grp->gr_gid; 4273 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4274 ac--; av++; 4275 } 4276 break; 4277 4278 case TOK_JAIL: 4279 NEED1("jail requires argument"); 4280 { 4281 char *end; 4282 int jid; 4283 4284 cmd->opcode = O_JAIL; 4285 jid = (int)strtol(*av, &end, 0); 4286 if (jid < 0 || *end != '\0') 4287 errx(EX_DATAERR, "jail requires prison ID"); 4288 cmd32->d[0] = (uint32_t)jid; 4289 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4290 ac--; av++; 4291 } 4292 break; 4293 4294 case TOK_ESTAB: 4295 fill_cmd(cmd, O_ESTAB, 0, 0); 4296 break; 4297 4298 case TOK_SETUP: 4299 fill_cmd(cmd, O_TCPFLAGS, 0, 4300 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4301 break; 4302 4303 case TOK_TCPDATALEN: 4304 NEED1("tcpdatalen requires length"); 4305 if (strpbrk(*av, "-,")) { 4306 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 4307 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4308 } else 4309 fill_cmd(cmd, O_TCPDATALEN, 0, 4310 strtoul(*av, NULL, 0)); 4311 ac--; av++; 4312 break; 4313 4314 case TOK_TCPOPTS: 4315 NEED1("missing argument for tcpoptions"); 4316 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 4317 ac--; av++; 4318 break; 4319 4320 case TOK_TCPSEQ: 4321 case TOK_TCPACK: 4322 NEED1("tcpseq/tcpack requires argument"); 4323 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4324 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4325 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4326 ac--; av++; 4327 break; 4328 4329 case TOK_TCPWIN: 4330 NEED1("tcpwin requires length"); 4331 fill_cmd(cmd, O_TCPWIN, 0, 4332 htons(strtoul(*av, NULL, 0))); 4333 ac--; av++; 4334 break; 4335 4336 case TOK_TCPFLAGS: 4337 NEED1("missing argument for tcpflags"); 4338 cmd->opcode = O_TCPFLAGS; 4339 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 4340 ac--; av++; 4341 break; 4342 4343 case TOK_KEEPSTATE: 4344 if (open_par) 4345 errx(EX_USAGE, "keep-state cannot be part " 4346 "of an or block"); 4347 if (have_state) 4348 errx(EX_USAGE, "only one of keep-state " 4349 "and limit is allowed"); 4350 have_state = cmd; 4351 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4352 break; 4353 4354 case TOK_LIMIT: 4355 if (open_par) 4356 errx(EX_USAGE, "limit cannot be part " 4357 "of an or block"); 4358 if (have_state) 4359 errx(EX_USAGE, "only one of keep-state " 4360 "and limit is allowed"); 4361 NEED1("limit needs mask and # of connections"); 4362 have_state = cmd; 4363 { 4364 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4365 4366 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4367 cmd->opcode = O_LIMIT; 4368 c->limit_mask = 0; 4369 c->conn_limit = 0; 4370 for (; ac >1 ;) { 4371 int val; 4372 4373 val = match_token(limit_masks, *av); 4374 if (val <= 0) 4375 break; 4376 c->limit_mask |= val; 4377 ac--; av++; 4378 } 4379 c->conn_limit = atoi(*av); 4380 if (c->conn_limit == 0) 4381 errx(EX_USAGE, "limit: limit must be >0"); 4382 if (c->limit_mask == 0) 4383 errx(EX_USAGE, "missing limit mask"); 4384 ac--; av++; 4385 } 4386 break; 4387 4388 case TOK_PROTO: 4389 NEED1("missing protocol"); 4390 if (add_proto(cmd, *av, &proto)) { 4391 ac--; av++; 4392 } else 4393 errx(EX_DATAERR, "invalid protocol ``%s''", 4394 *av); 4395 break; 4396 4397 case TOK_SRCIP: 4398 NEED1("missing source IP"); 4399 if (add_srcip(cmd, *av)) { 4400 ac--; av++; 4401 } 4402 break; 4403 4404 case TOK_DSTIP: 4405 NEED1("missing destination IP"); 4406 if (add_dstip(cmd, *av)) { 4407 ac--; av++; 4408 } 4409 break; 4410 4411 case TOK_SRCIP6: 4412 NEED1("missing source IP6"); 4413 if (add_srcip6(cmd, *av)) { 4414 ac--; av++; 4415 } 4416 break; 4417 4418 case TOK_DSTIP6: 4419 NEED1("missing destination IP6"); 4420 if (add_dstip6(cmd, *av)) { 4421 ac--; av++; 4422 } 4423 break; 4424 4425 case TOK_SRCPORT: 4426 NEED1("missing source port"); 4427 if (_substrcmp(*av, "any") == 0 || 4428 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4429 ac--; av++; 4430 } else 4431 errx(EX_DATAERR, "invalid source port %s", *av); 4432 break; 4433 4434 case TOK_DSTPORT: 4435 NEED1("missing destination port"); 4436 if (_substrcmp(*av, "any") == 0 || 4437 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4438 ac--; av++; 4439 } else 4440 errx(EX_DATAERR, "invalid destination port %s", 4441 *av); 4442 break; 4443 4444 case TOK_MAC: 4445 if (add_mac(cmd, ac, av)) { 4446 ac -= 2; av += 2; 4447 } 4448 break; 4449 4450 case TOK_MACTYPE: 4451 NEED1("missing mac type"); 4452 if (!add_mactype(cmd, ac, *av)) 4453 errx(EX_DATAERR, "invalid mac type %s", *av); 4454 ac--; av++; 4455 break; 4456 4457 case TOK_VERREVPATH: 4458 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4459 break; 4460 4461 case TOK_VERSRCREACH: 4462 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4463 break; 4464 4465 case TOK_ANTISPOOF: 4466 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4467 break; 4468 4469 case TOK_IPSEC: 4470 fill_cmd(cmd, O_IPSEC, 0, 0); 4471 break; 4472 4473 case TOK_IPV6: 4474 fill_cmd(cmd, O_IP6, 0, 0); 4475 break; 4476 4477 case TOK_IPV4: 4478 fill_cmd(cmd, O_IP4, 0, 0); 4479 break; 4480 4481 case TOK_EXT6HDR: 4482 fill_ext6hdr( cmd, *av ); 4483 ac--; av++; 4484 break; 4485 4486 case TOK_FLOWID: 4487 if (proto != IPPROTO_IPV6 ) 4488 errx( EX_USAGE, "flow-id filter is active " 4489 "only for ipv6 protocol\n"); 4490 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 4491 ac--; av++; 4492 break; 4493 4494 case TOK_COMMENT: 4495 fill_comment(cmd, ac, av); 4496 av += ac; 4497 ac = 0; 4498 break; 4499 4500 default: 4501 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4502 } 4503 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4504 prev = cmd; 4505 cmd = next_cmd(cmd); 4506 } 4507 } 4508 4509 done: 4510 /* 4511 * Now copy stuff into the rule. 4512 * If we have a keep-state option, the first instruction 4513 * must be a PROBE_STATE (which is generated here). 4514 * If we have a LOG option, it was stored as the first command, 4515 * and now must be moved to the top of the action part. 4516 */ 4517 dst = (ipfw_insn *)rule->cmd; 4518 4519 /* 4520 * First thing to write into the command stream is the match probability. 4521 */ 4522 if (match_prob != 1) { /* 1 means always match */ 4523 dst->opcode = O_PROB; 4524 dst->len = 2; 4525 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4526 dst += dst->len; 4527 } 4528 4529 /* 4530 * generate O_PROBE_STATE if necessary 4531 */ 4532 if (have_state && have_state->opcode != O_CHECK_STATE) { 4533 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4534 dst = next_cmd(dst); 4535 } 4536 /* 4537 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ 4538 */ 4539 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4540 i = F_LEN(src); 4541 4542 switch (src->opcode) { 4543 case O_LOG: 4544 case O_KEEP_STATE: 4545 case O_LIMIT: 4546 case O_ALTQ: 4547 break; 4548 default: 4549 bcopy(src, dst, i * sizeof(uint32_t)); 4550 dst += i; 4551 } 4552 } 4553 4554 /* 4555 * put back the have_state command as last opcode 4556 */ 4557 if (have_state && have_state->opcode != O_CHECK_STATE) { 4558 i = F_LEN(have_state); 4559 bcopy(have_state, dst, i * sizeof(uint32_t)); 4560 dst += i; 4561 } 4562 /* 4563 * start action section 4564 */ 4565 rule->act_ofs = dst - rule->cmd; 4566 4567 /* 4568 * put back O_LOG, O_ALTQ if necessary 4569 */ 4570 if (have_log) { 4571 i = F_LEN(have_log); 4572 bcopy(have_log, dst, i * sizeof(uint32_t)); 4573 dst += i; 4574 } 4575 if (have_altq) { 4576 i = F_LEN(have_altq); 4577 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4578 dst += i; 4579 } 4580 /* 4581 * copy all other actions 4582 */ 4583 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4584 i = F_LEN(src); 4585 bcopy(src, dst, i * sizeof(uint32_t)); 4586 dst += i; 4587 } 4588 4589 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4590 i = (char *)dst - (char *)rule; 4591 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 4592 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 4593 if (!do_quiet) 4594 show_ipfw(rule, 0, 0); 4595 } 4596 4597 static void 4598 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 4599 { 4600 int rulenum; 4601 int failed = EX_OK; 4602 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 4603 4604 av++; ac--; 4605 4606 if (!ac) { 4607 /* clear all entries */ 4608 if (do_cmd(optname, NULL, 0) < 0) 4609 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 4610 if (!do_quiet) 4611 printf("%s.\n", optname == IP_FW_ZERO ? 4612 "Accounting cleared":"Logging counts reset"); 4613 4614 return; 4615 } 4616 4617 while (ac) { 4618 /* Rule number */ 4619 if (isdigit(**av)) { 4620 rulenum = atoi(*av); 4621 av++; 4622 ac--; 4623 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 4624 warn("rule %u: setsockopt(IP_FW_%s)", 4625 rulenum, name); 4626 failed = EX_UNAVAILABLE; 4627 } else if (!do_quiet) 4628 printf("Entry %d %s.\n", rulenum, 4629 optname == IP_FW_ZERO ? 4630 "cleared" : "logging count reset"); 4631 } else { 4632 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4633 } 4634 } 4635 if (failed != EX_OK) 4636 exit(failed); 4637 } 4638 4639 static void 4640 flush(int force) 4641 { 4642 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 4643 4644 if (!force && !do_quiet) { /* need to ask user */ 4645 int c; 4646 4647 printf("Are you sure? [yn] "); 4648 fflush(stdout); 4649 do { 4650 c = toupper(getc(stdin)); 4651 while (c != '\n' && getc(stdin) != '\n') 4652 if (feof(stdin)) 4653 return; /* and do not flush */ 4654 } while (c != 'Y' && c != 'N'); 4655 printf("\n"); 4656 if (c == 'N') /* user said no */ 4657 return; 4658 } 4659 if (do_cmd(cmd, NULL, 0) < 0) 4660 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 4661 do_pipe ? "DUMMYNET" : "FW"); 4662 if (!do_quiet) 4663 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 4664 } 4665 4666 /* 4667 * Free a the (locally allocated) copy of command line arguments. 4668 */ 4669 static void 4670 free_args(int ac, char **av) 4671 { 4672 int i; 4673 4674 for (i=0; i < ac; i++) 4675 free(av[i]); 4676 free(av); 4677 } 4678 4679 /* 4680 * This one handles all table-related commands 4681 * ipfw table N add addr[/masklen] [value] 4682 * ipfw table N delete addr[/masklen] 4683 * ipfw table N flush 4684 * ipfw table N list 4685 */ 4686 static void 4687 table_handler(int ac, char *av[]) 4688 { 4689 ipfw_table_entry ent; 4690 ipfw_table *tbl; 4691 int do_add; 4692 char *p; 4693 socklen_t l; 4694 uint32_t a; 4695 4696 ac--; av++; 4697 if (ac && isdigit(**av)) { 4698 ent.tbl = atoi(*av); 4699 ac--; av++; 4700 } else 4701 errx(EX_USAGE, "table number required"); 4702 NEED1("table needs command"); 4703 if (_substrcmp(*av, "add") == 0 || 4704 _substrcmp(*av, "delete") == 0) { 4705 do_add = **av == 'a'; 4706 ac--; av++; 4707 if (!ac) 4708 errx(EX_USAGE, "IP address required"); 4709 p = strchr(*av, '/'); 4710 if (p) { 4711 *p++ = '\0'; 4712 ent.masklen = atoi(p); 4713 if (ent.masklen > 32) 4714 errx(EX_DATAERR, "bad width ``%s''", p); 4715 } else 4716 ent.masklen = 32; 4717 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 4718 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4719 ac--; av++; 4720 if (do_add && ac) 4721 ent.value = strtoul(*av, NULL, 0); 4722 else 4723 ent.value = 0; 4724 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 4725 &ent, sizeof(ent)) < 0) 4726 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 4727 do_add ? "ADD" : "DEL"); 4728 } else if (_substrcmp(*av, "flush") == 0) { 4729 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4730 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4731 } else if (_substrcmp(*av, "list") == 0) { 4732 a = ent.tbl; 4733 l = sizeof(a); 4734 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4735 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4736 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4737 tbl = malloc(l); 4738 if (tbl == NULL) 4739 err(EX_OSERR, "malloc"); 4740 tbl->tbl = ent.tbl; 4741 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 4742 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 4743 for (a = 0; a < tbl->cnt; a++) { 4744 printf("%s/%u %u\n", 4745 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 4746 tbl->ent[a].masklen, tbl->ent[a].value); 4747 } 4748 } else 4749 errx(EX_USAGE, "invalid table command %s", *av); 4750 } 4751 4752 /* 4753 * Called with the arguments (excluding program name). 4754 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 4755 */ 4756 static int 4757 ipfw_main(int oldac, char **oldav) 4758 { 4759 int ch, ac, save_ac; 4760 char **av, **save_av; 4761 int do_acct = 0; /* Show packet/byte count */ 4762 4763 #define WHITESP " \t\f\v\n\r" 4764 if (oldac == 0) 4765 return 1; 4766 else if (oldac == 1) { 4767 /* 4768 * If we are called with a single string, try to split it into 4769 * arguments for subsequent parsing. 4770 * But first, remove spaces after a ',', by copying the string 4771 * in-place. 4772 */ 4773 char *arg = oldav[0]; /* The string... */ 4774 int l = strlen(arg); 4775 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 4776 int i, j; 4777 for (i = j = 0; i < l; i++) { 4778 if (arg[i] == '#') /* comment marker */ 4779 break; 4780 if (copy) { 4781 arg[j++] = arg[i]; 4782 copy = !index("," WHITESP, arg[i]); 4783 } else { 4784 copy = !index(WHITESP, arg[i]); 4785 if (copy) 4786 arg[j++] = arg[i]; 4787 } 4788 } 4789 if (!copy && j > 0) /* last char was a 'blank', remove it */ 4790 j--; 4791 l = j; /* the new argument length */ 4792 arg[j++] = '\0'; 4793 if (l == 0) /* empty string! */ 4794 return 1; 4795 4796 /* 4797 * First, count number of arguments. Because of the previous 4798 * processing, this is just the number of blanks plus 1. 4799 */ 4800 for (i = 0, ac = 1; i < l; i++) 4801 if (index(WHITESP, arg[i]) != NULL) 4802 ac++; 4803 4804 av = calloc(ac, sizeof(char *)); 4805 4806 /* 4807 * Second, copy arguments from cmd[] to av[]. For each one, 4808 * j is the initial character, i is the one past the end. 4809 */ 4810 for (ac = 0, i = j = 0; i < l; i++) 4811 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 4812 if (i == l-1) 4813 i++; 4814 av[ac] = calloc(i-j+1, 1); 4815 bcopy(arg+j, av[ac], i-j); 4816 ac++; 4817 j = i + 1; 4818 } 4819 } else { 4820 /* 4821 * If an argument ends with ',' join with the next one. 4822 */ 4823 int first, i, l; 4824 4825 av = calloc(oldac, sizeof(char *)); 4826 for (first = i = ac = 0, l = 0; i < oldac; i++) { 4827 char *arg = oldav[i]; 4828 int k = strlen(arg); 4829 4830 l += k; 4831 if (arg[k-1] != ',' || i == oldac-1) { 4832 /* Time to copy. */ 4833 av[ac] = calloc(l+1, 1); 4834 for (l=0; first <= i; first++) { 4835 strcat(av[ac]+l, oldav[first]); 4836 l += strlen(oldav[first]); 4837 } 4838 ac++; 4839 l = 0; 4840 first = i+1; 4841 } 4842 } 4843 } 4844 4845 /* Set the force flag for non-interactive processes */ 4846 if (!do_force) 4847 do_force = !isatty(STDIN_FILENO); 4848 4849 /* Save arguments for final freeing of memory. */ 4850 save_ac = ac; 4851 save_av = av; 4852 4853 optind = optreset = 0; 4854 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 4855 switch (ch) { 4856 case 'a': 4857 do_acct = 1; 4858 break; 4859 4860 case 'b': 4861 comment_only = 1; 4862 do_compact = 1; 4863 break; 4864 4865 case 'c': 4866 do_compact = 1; 4867 break; 4868 4869 case 'd': 4870 do_dynamic = 1; 4871 break; 4872 4873 case 'e': 4874 do_expired = 1; 4875 break; 4876 4877 case 'f': 4878 do_force = 1; 4879 break; 4880 4881 case 'h': /* help */ 4882 free_args(save_ac, save_av); 4883 help(); 4884 break; /* NOTREACHED */ 4885 4886 case 'n': 4887 test_only = 1; 4888 break; 4889 4890 case 'N': 4891 do_resolv = 1; 4892 break; 4893 4894 case 'q': 4895 do_quiet = 1; 4896 break; 4897 4898 case 's': /* sort */ 4899 do_sort = atoi(optarg); 4900 break; 4901 4902 case 'S': 4903 show_sets = 1; 4904 break; 4905 4906 case 't': 4907 do_time = 1; 4908 break; 4909 4910 case 'T': 4911 do_time = 2; /* numeric timestamp */ 4912 break; 4913 4914 case 'v': /* verbose */ 4915 verbose = 1; 4916 break; 4917 4918 default: 4919 free_args(save_ac, save_av); 4920 return 1; 4921 } 4922 4923 ac -= optind; 4924 av += optind; 4925 NEED1("bad arguments, for usage summary ``ipfw''"); 4926 4927 /* 4928 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 4929 * e.g. "100 add allow ..." instead of "add 100 allow ...". 4930 * In case, swap first and second argument to get the normal form. 4931 */ 4932 if (ac > 1 && isdigit(*av[0])) { 4933 char *p = av[0]; 4934 4935 av[0] = av[1]; 4936 av[1] = p; 4937 } 4938 4939 /* 4940 * optional: pipe or queue 4941 */ 4942 do_pipe = 0; 4943 if (_substrcmp(*av, "pipe") == 0) 4944 do_pipe = 1; 4945 else if (_substrcmp(*av, "queue") == 0) 4946 do_pipe = 2; 4947 if (do_pipe) { 4948 ac--; 4949 av++; 4950 } 4951 NEED1("missing command"); 4952 4953 /* 4954 * For pipes and queues we normally say 'pipe NN config' 4955 * but the code is easier to parse as 'pipe config NN' 4956 * so we swap the two arguments. 4957 */ 4958 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 4959 char *p = av[0]; 4960 4961 av[0] = av[1]; 4962 av[1] = p; 4963 } 4964 4965 if (_substrcmp(*av, "add") == 0) 4966 add(ac, av); 4967 else if (do_pipe && _substrcmp(*av, "config") == 0) 4968 config_pipe(ac, av); 4969 else if (_substrcmp(*av, "delete") == 0) 4970 delete(ac, av); 4971 else if (_substrcmp(*av, "flush") == 0) 4972 flush(do_force); 4973 else if (_substrcmp(*av, "zero") == 0) 4974 zero(ac, av, IP_FW_ZERO); 4975 else if (_substrcmp(*av, "resetlog") == 0) 4976 zero(ac, av, IP_FW_RESETLOG); 4977 else if (_substrcmp(*av, "print") == 0 || 4978 _substrcmp(*av, "list") == 0) 4979 list(ac, av, do_acct); 4980 else if (_substrcmp(*av, "set") == 0) 4981 sets_handler(ac, av); 4982 else if (_substrcmp(*av, "table") == 0) 4983 table_handler(ac, av); 4984 else if (_substrcmp(*av, "enable") == 0) 4985 sysctl_handler(ac, av, 1); 4986 else if (_substrcmp(*av, "disable") == 0) 4987 sysctl_handler(ac, av, 0); 4988 else if (_substrcmp(*av, "show") == 0) 4989 list(ac, av, 1 /* show counters */); 4990 else 4991 errx(EX_USAGE, "bad command `%s'", *av); 4992 4993 /* Free memory allocated in the argument parsing. */ 4994 free_args(save_ac, save_av); 4995 return 0; 4996 } 4997 4998 4999 static void 5000 ipfw_readfile(int ac, char *av[]) 5001 { 5002 #define MAX_ARGS 32 5003 char buf[BUFSIZ]; 5004 char *cmd = NULL, *filename = av[ac-1]; 5005 int c, lineno=0; 5006 FILE *f = NULL; 5007 pid_t preproc = 0; 5008 5009 filename = av[ac-1]; 5010 5011 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 5012 switch(c) { 5013 case 'c': 5014 do_compact = 1; 5015 break; 5016 5017 case 'f': 5018 do_force = 1; 5019 break; 5020 5021 case 'N': 5022 do_resolv = 1; 5023 break; 5024 5025 case 'n': 5026 test_only = 1; 5027 break; 5028 5029 case 'p': 5030 cmd = optarg; 5031 /* 5032 * Skip previous args and delete last one, so we 5033 * pass all but the last argument to the preprocessor 5034 * via av[optind-1] 5035 */ 5036 av += optind - 1; 5037 ac -= optind - 1; 5038 av[ac-1] = NULL; 5039 fprintf(stderr, "command is %s\n", av[0]); 5040 break; 5041 5042 case 'q': 5043 do_quiet = 1; 5044 break; 5045 5046 case 'S': 5047 show_sets = 1; 5048 break; 5049 5050 default: 5051 errx(EX_USAGE, "bad arguments, for usage" 5052 " summary ``ipfw''"); 5053 } 5054 5055 if (cmd != NULL) 5056 break; 5057 } 5058 5059 if (cmd == NULL && ac != optind + 1) { 5060 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 5061 errx(EX_USAGE, "extraneous filename arguments"); 5062 } 5063 5064 if ((f = fopen(filename, "r")) == NULL) 5065 err(EX_UNAVAILABLE, "fopen: %s", filename); 5066 5067 if (cmd != NULL) { /* pipe through preprocessor */ 5068 int pipedes[2]; 5069 5070 if (pipe(pipedes) == -1) 5071 err(EX_OSERR, "cannot create pipe"); 5072 5073 preproc = fork(); 5074 if (preproc == -1) 5075 err(EX_OSERR, "cannot fork"); 5076 5077 if (preproc == 0) { 5078 /* 5079 * Child, will run the preprocessor with the 5080 * file on stdin and the pipe on stdout. 5081 */ 5082 if (dup2(fileno(f), 0) == -1 5083 || dup2(pipedes[1], 1) == -1) 5084 err(EX_OSERR, "dup2()"); 5085 fclose(f); 5086 close(pipedes[1]); 5087 close(pipedes[0]); 5088 execvp(cmd, av); 5089 err(EX_OSERR, "execvp(%s) failed", cmd); 5090 } else { /* parent, will reopen f as the pipe */ 5091 fclose(f); 5092 close(pipedes[1]); 5093 if ((f = fdopen(pipedes[0], "r")) == NULL) { 5094 int savederrno = errno; 5095 5096 (void)kill(preproc, SIGTERM); 5097 errno = savederrno; 5098 err(EX_OSERR, "fdopen()"); 5099 } 5100 } 5101 } 5102 5103 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 5104 char linename[10]; 5105 char *args[1]; 5106 5107 lineno++; 5108 sprintf(linename, "Line %d", lineno); 5109 setprogname(linename); /* XXX */ 5110 args[0] = buf; 5111 ipfw_main(1, args); 5112 } 5113 fclose(f); 5114 if (cmd != NULL) { 5115 int status; 5116 5117 if (waitpid(preproc, &status, 0) == -1) 5118 errx(EX_OSERR, "waitpid()"); 5119 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 5120 errx(EX_UNAVAILABLE, 5121 "preprocessor exited with status %d", 5122 WEXITSTATUS(status)); 5123 else if (WIFSIGNALED(status)) 5124 errx(EX_UNAVAILABLE, 5125 "preprocessor exited with signal %d", 5126 WTERMSIG(status)); 5127 } 5128 } 5129 5130 int 5131 main(int ac, char *av[]) 5132 { 5133 /* 5134 * If the last argument is an absolute pathname, interpret it 5135 * as a file to be preprocessed. 5136 */ 5137 5138 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 5139 ipfw_readfile(ac, av); 5140 else { 5141 if (ipfw_main(ac-1, av+1)) 5142 show_usage(); 5143 } 5144 return EX_OK; 5145 } 5146