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 TOK_UNREACH6, 281 TOK_RESET6, 282 }; 283 284 struct _s_x dummynet_params[] = { 285 { "plr", TOK_PLR }, 286 { "noerror", TOK_NOERROR }, 287 { "buckets", TOK_BUCKETS }, 288 { "dst-ip", TOK_DSTIP }, 289 { "src-ip", TOK_SRCIP }, 290 { "dst-port", TOK_DSTPORT }, 291 { "src-port", TOK_SRCPORT }, 292 { "proto", TOK_PROTO }, 293 { "weight", TOK_WEIGHT }, 294 { "all", TOK_ALL }, 295 { "mask", TOK_MASK }, 296 { "droptail", TOK_DROPTAIL }, 297 { "red", TOK_RED }, 298 { "gred", TOK_GRED }, 299 { "bw", TOK_BW }, 300 { "bandwidth", TOK_BW }, 301 { "delay", TOK_DELAY }, 302 { "pipe", TOK_PIPE }, 303 { "queue", TOK_QUEUE }, 304 { "flow-id", TOK_FLOWID}, 305 { "dst-ipv6", TOK_DSTIP6}, 306 { "dst-ip6", TOK_DSTIP6}, 307 { "src-ipv6", TOK_SRCIP6}, 308 { "src-ip6", TOK_SRCIP6}, 309 { "dummynet-params", TOK_NULL }, 310 { NULL, 0 } /* terminator */ 311 }; 312 313 struct _s_x rule_actions[] = { 314 { "accept", TOK_ACCEPT }, 315 { "pass", TOK_ACCEPT }, 316 { "allow", TOK_ACCEPT }, 317 { "permit", TOK_ACCEPT }, 318 { "count", TOK_COUNT }, 319 { "pipe", TOK_PIPE }, 320 { "queue", TOK_QUEUE }, 321 { "divert", TOK_DIVERT }, 322 { "tee", TOK_TEE }, 323 { "netgraph", TOK_NETGRAPH }, 324 { "ngtee", TOK_NGTEE }, 325 { "fwd", TOK_FORWARD }, 326 { "forward", TOK_FORWARD }, 327 { "skipto", TOK_SKIPTO }, 328 { "deny", TOK_DENY }, 329 { "drop", TOK_DENY }, 330 { "reject", TOK_REJECT }, 331 { "reset6", TOK_RESET6 }, 332 { "reset", TOK_RESET }, 333 { "unreach6", TOK_UNREACH6 }, 334 { "unreach", TOK_UNREACH }, 335 { "check-state", TOK_CHECKSTATE }, 336 { "//", TOK_COMMENT }, 337 { NULL, 0 } /* terminator */ 338 }; 339 340 struct _s_x rule_action_params[] = { 341 { "altq", TOK_ALTQ }, 342 { "log", TOK_LOG }, 343 { NULL, 0 } /* terminator */ 344 }; 345 346 struct _s_x rule_options[] = { 347 { "uid", TOK_UID }, 348 { "gid", TOK_GID }, 349 { "jail", TOK_JAIL }, 350 { "in", TOK_IN }, 351 { "limit", TOK_LIMIT }, 352 { "keep-state", TOK_KEEPSTATE }, 353 { "bridged", TOK_LAYER2 }, 354 { "layer2", TOK_LAYER2 }, 355 { "out", TOK_OUT }, 356 { "diverted", TOK_DIVERTED }, 357 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 358 { "diverted-output", TOK_DIVERTEDOUTPUT }, 359 { "xmit", TOK_XMIT }, 360 { "recv", TOK_RECV }, 361 { "via", TOK_VIA }, 362 { "fragment", TOK_FRAG }, 363 { "frag", TOK_FRAG }, 364 { "ipoptions", TOK_IPOPTS }, 365 { "ipopts", TOK_IPOPTS }, 366 { "iplen", TOK_IPLEN }, 367 { "ipid", TOK_IPID }, 368 { "ipprecedence", TOK_IPPRECEDENCE }, 369 { "iptos", TOK_IPTOS }, 370 { "ipttl", TOK_IPTTL }, 371 { "ipversion", TOK_IPVER }, 372 { "ipver", TOK_IPVER }, 373 { "estab", TOK_ESTAB }, 374 { "established", TOK_ESTAB }, 375 { "setup", TOK_SETUP }, 376 { "tcpdatalen", TOK_TCPDATALEN }, 377 { "tcpflags", TOK_TCPFLAGS }, 378 { "tcpflgs", TOK_TCPFLAGS }, 379 { "tcpoptions", TOK_TCPOPTS }, 380 { "tcpopts", TOK_TCPOPTS }, 381 { "tcpseq", TOK_TCPSEQ }, 382 { "tcpack", TOK_TCPACK }, 383 { "tcpwin", TOK_TCPWIN }, 384 { "icmptype", TOK_ICMPTYPES }, 385 { "icmptypes", TOK_ICMPTYPES }, 386 { "dst-ip", TOK_DSTIP }, 387 { "src-ip", TOK_SRCIP }, 388 { "dst-port", TOK_DSTPORT }, 389 { "src-port", TOK_SRCPORT }, 390 { "proto", TOK_PROTO }, 391 { "MAC", TOK_MAC }, 392 { "mac", TOK_MAC }, 393 { "mac-type", TOK_MACTYPE }, 394 { "verrevpath", TOK_VERREVPATH }, 395 { "versrcreach", TOK_VERSRCREACH }, 396 { "antispoof", TOK_ANTISPOOF }, 397 { "ipsec", TOK_IPSEC }, 398 { "icmp6type", TOK_ICMP6TYPES }, 399 { "icmp6types", TOK_ICMP6TYPES }, 400 { "ext6hdr", TOK_EXT6HDR}, 401 { "flow-id", TOK_FLOWID}, 402 { "ipv6", TOK_IPV6}, 403 { "ip6", TOK_IPV6}, 404 { "ipv4", TOK_IPV4}, 405 { "ip4", TOK_IPV4}, 406 { "dst-ipv6", TOK_DSTIP6}, 407 { "dst-ip6", TOK_DSTIP6}, 408 { "src-ipv6", TOK_SRCIP6}, 409 { "src-ip6", TOK_SRCIP6}, 410 { "//", TOK_COMMENT }, 411 412 { "not", TOK_NOT }, /* pseudo option */ 413 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 414 { "or", TOK_OR }, /* pseudo option */ 415 { "|", /* escape */ TOK_OR }, /* pseudo option */ 416 { "{", TOK_STARTBRACE }, /* pseudo option */ 417 { "(", TOK_STARTBRACE }, /* pseudo option */ 418 { "}", TOK_ENDBRACE }, /* pseudo option */ 419 { ")", TOK_ENDBRACE }, /* pseudo option */ 420 { NULL, 0 } /* terminator */ 421 }; 422 423 static __inline uint64_t 424 align_uint64(uint64_t *pll) { 425 uint64_t ret; 426 427 bcopy (pll, &ret, sizeof(ret)); 428 return ret; 429 } 430 431 /* 432 * conditionally runs the command. 433 */ 434 static int 435 do_cmd(int optname, void *optval, uintptr_t optlen) 436 { 437 static int s = -1; /* the socket */ 438 int i; 439 440 if (test_only) 441 return 0; 442 443 if (s == -1) 444 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 445 if (s < 0) 446 err(EX_UNAVAILABLE, "socket"); 447 448 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 449 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 450 optname == IP_FW_TABLE_GETSIZE) 451 i = getsockopt(s, IPPROTO_IP, optname, optval, 452 (socklen_t *)optlen); 453 else 454 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 455 return i; 456 } 457 458 /** 459 * match_token takes a table and a string, returns the value associated 460 * with the string (-1 in case of failure). 461 */ 462 static int 463 match_token(struct _s_x *table, char *string) 464 { 465 struct _s_x *pt; 466 uint i = strlen(string); 467 468 for (pt = table ; i && pt->s != NULL ; pt++) 469 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 470 return pt->x; 471 return -1; 472 } 473 474 /** 475 * match_value takes a table and a value, returns the string associated 476 * with the value (NULL in case of failure). 477 */ 478 static char const * 479 match_value(struct _s_x *p, int value) 480 { 481 for (; p->s != NULL; p++) 482 if (p->x == value) 483 return p->s; 484 return NULL; 485 } 486 487 /* 488 * _substrcmp takes two strings and returns 1 if they do not match, 489 * and 0 if they match exactly or the first string is a sub-string 490 * of the second. A warning is printed to stderr in the case that the 491 * first string is a sub-string of the second. 492 * 493 * This function will be removed in the future through the usual 494 * deprecation process. 495 */ 496 static int 497 _substrcmp(const char *str1, const char* str2) 498 { 499 500 if (strncmp(str1, str2, strlen(str1)) != 0) 501 return 1; 502 503 if (strlen(str1) != strlen(str2)) 504 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 505 str1, str2); 506 return 0; 507 } 508 509 /* 510 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 511 * and 0 if they match exactly or the second string is a sub-string 512 * of the first. A warning is printed to stderr in the case that the 513 * first string does not match the third. 514 * 515 * This function exists to warn about the bizzare construction 516 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 517 * for "bytes". The problem is that in addition to accepting "by", 518 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 519 * other string beginning with "by". 520 * 521 * This function will be removed in the future through the usual 522 * deprecation process. 523 */ 524 static int 525 _substrcmp2(const char *str1, const char* str2, const char* str3) 526 { 527 528 if (strncmp(str1, str2, strlen(str2)) != 0) 529 return 1; 530 531 if (strcmp(str1, str3) != 0) 532 warnx("DEPRECATED: '%s' matched '%s'", 533 str1, str3); 534 return 0; 535 } 536 537 /* 538 * prints one port, symbolic or numeric 539 */ 540 static void 541 print_port(int proto, uint16_t port) 542 { 543 544 if (proto == IPPROTO_ETHERTYPE) { 545 char const *s; 546 547 if (do_resolv && (s = match_value(ether_types, port)) ) 548 printf("%s", s); 549 else 550 printf("0x%04x", port); 551 } else { 552 struct servent *se = NULL; 553 if (do_resolv) { 554 struct protoent *pe = getprotobynumber(proto); 555 556 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 557 } 558 if (se) 559 printf("%s", se->s_name); 560 else 561 printf("%d", port); 562 } 563 } 564 565 struct _s_x _port_name[] = { 566 {"dst-port", O_IP_DSTPORT}, 567 {"src-port", O_IP_SRCPORT}, 568 {"ipid", O_IPID}, 569 {"iplen", O_IPLEN}, 570 {"ipttl", O_IPTTL}, 571 {"mac-type", O_MAC_TYPE}, 572 {"tcpdatalen", O_TCPDATALEN}, 573 {NULL, 0} 574 }; 575 576 /* 577 * Print the values in a list 16-bit items of the types above. 578 * XXX todo: add support for mask. 579 */ 580 static void 581 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 582 { 583 uint16_t *p = cmd->ports; 584 int i; 585 char const *sep; 586 587 if (cmd->o.len & F_NOT) 588 printf(" not"); 589 if (opcode != 0) { 590 sep = match_value(_port_name, opcode); 591 if (sep == NULL) 592 sep = "???"; 593 printf (" %s", sep); 594 } 595 sep = " "; 596 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 597 printf(sep); 598 print_port(proto, p[0]); 599 if (p[0] != p[1]) { 600 printf("-"); 601 print_port(proto, p[1]); 602 } 603 sep = ","; 604 } 605 } 606 607 /* 608 * Like strtol, but also translates service names into port numbers 609 * for some protocols. 610 * In particular: 611 * proto == -1 disables the protocol check; 612 * proto == IPPROTO_ETHERTYPE looks up an internal table 613 * proto == <some value in /etc/protocols> matches the values there. 614 * Returns *end == s in case the parameter is not found. 615 */ 616 static int 617 strtoport(char *s, char **end, int base, int proto) 618 { 619 char *p, *buf; 620 char *s1; 621 int i; 622 623 *end = s; /* default - not found */ 624 if (*s == '\0') 625 return 0; /* not found */ 626 627 if (isdigit(*s)) 628 return strtol(s, end, base); 629 630 /* 631 * find separator. '\\' escapes the next char. 632 */ 633 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 634 if (*s1 == '\\' && s1[1] != '\0') 635 s1++; 636 637 buf = malloc(s1 - s + 1); 638 if (buf == NULL) 639 return 0; 640 641 /* 642 * copy into a buffer skipping backslashes 643 */ 644 for (p = s, i = 0; p != s1 ; p++) 645 if (*p != '\\') 646 buf[i++] = *p; 647 buf[i++] = '\0'; 648 649 if (proto == IPPROTO_ETHERTYPE) { 650 i = match_token(ether_types, buf); 651 free(buf); 652 if (i != -1) { /* found */ 653 *end = s1; 654 return i; 655 } 656 } else { 657 struct protoent *pe = NULL; 658 struct servent *se; 659 660 if (proto != 0) 661 pe = getprotobynumber(proto); 662 setservent(1); 663 se = getservbyname(buf, pe ? pe->p_name : NULL); 664 free(buf); 665 if (se != NULL) { 666 *end = s1; 667 return ntohs(se->s_port); 668 } 669 } 670 return 0; /* not found */ 671 } 672 673 /* 674 * Map between current altq queue id numbers and names. 675 */ 676 static int altq_fetched = 0; 677 static TAILQ_HEAD(, pf_altq) altq_entries = 678 TAILQ_HEAD_INITIALIZER(altq_entries); 679 680 static void 681 altq_set_enabled(int enabled) 682 { 683 int pffd; 684 685 pffd = open("/dev/pf", O_RDWR); 686 if (pffd == -1) 687 err(EX_UNAVAILABLE, 688 "altq support opening pf(4) control device"); 689 if (enabled) { 690 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 691 err(EX_UNAVAILABLE, "enabling altq"); 692 } else { 693 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 694 err(EX_UNAVAILABLE, "disabling altq"); 695 } 696 close(pffd); 697 } 698 699 static void 700 altq_fetch() 701 { 702 struct pfioc_altq pfioc; 703 struct pf_altq *altq; 704 int pffd, mnr; 705 706 if (altq_fetched) 707 return; 708 altq_fetched = 1; 709 pffd = open("/dev/pf", O_RDONLY); 710 if (pffd == -1) { 711 warn("altq support opening pf(4) control device"); 712 return; 713 } 714 bzero(&pfioc, sizeof(pfioc)); 715 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 716 warn("altq support getting queue list"); 717 close(pffd); 718 return; 719 } 720 mnr = pfioc.nr; 721 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 722 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 723 if (errno == EBUSY) 724 break; 725 warn("altq support getting queue list"); 726 close(pffd); 727 return; 728 } 729 if (pfioc.altq.qid == 0) 730 continue; 731 altq = malloc(sizeof(*altq)); 732 if (altq == NULL) 733 err(EX_OSERR, "malloc"); 734 *altq = pfioc.altq; 735 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 736 } 737 close(pffd); 738 } 739 740 static u_int32_t 741 altq_name_to_qid(const char *name) 742 { 743 struct pf_altq *altq; 744 745 altq_fetch(); 746 TAILQ_FOREACH(altq, &altq_entries, entries) 747 if (strcmp(name, altq->qname) == 0) 748 break; 749 if (altq == NULL) 750 errx(EX_DATAERR, "altq has no queue named `%s'", name); 751 return altq->qid; 752 } 753 754 static const char * 755 altq_qid_to_name(u_int32_t qid) 756 { 757 struct pf_altq *altq; 758 759 altq_fetch(); 760 TAILQ_FOREACH(altq, &altq_entries, entries) 761 if (qid == altq->qid) 762 break; 763 if (altq == NULL) 764 return NULL; 765 return altq->qname; 766 } 767 768 static void 769 fill_altq_qid(u_int32_t *qid, const char *av) 770 { 771 *qid = altq_name_to_qid(av); 772 } 773 774 /* 775 * Fill the body of the command with the list of port ranges. 776 */ 777 static int 778 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 779 { 780 uint16_t a, b, *p = cmd->ports; 781 int i = 0; 782 char *s = av; 783 784 while (*s) { 785 a = strtoport(av, &s, 0, proto); 786 if (s == av) /* no parameter */ 787 break; 788 if (*s == '-') { /* a range */ 789 av = s+1; 790 b = strtoport(av, &s, 0, proto); 791 if (s == av) /* no parameter */ 792 break; 793 p[0] = a; 794 p[1] = b; 795 } else if (*s == ',' || *s == '\0' ) 796 p[0] = p[1] = a; 797 else /* invalid separator */ 798 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 799 *s, av); 800 i++; 801 p += 2; 802 av = s+1; 803 } 804 if (i > 0) { 805 if (i+1 > F_LEN_MASK) 806 errx(EX_DATAERR, "too many ports/ranges\n"); 807 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 808 } 809 return i; 810 } 811 812 static struct _s_x icmpcodes[] = { 813 { "net", ICMP_UNREACH_NET }, 814 { "host", ICMP_UNREACH_HOST }, 815 { "protocol", ICMP_UNREACH_PROTOCOL }, 816 { "port", ICMP_UNREACH_PORT }, 817 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 818 { "srcfail", ICMP_UNREACH_SRCFAIL }, 819 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 820 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 821 { "isolated", ICMP_UNREACH_ISOLATED }, 822 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 823 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 824 { "tosnet", ICMP_UNREACH_TOSNET }, 825 { "toshost", ICMP_UNREACH_TOSHOST }, 826 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 827 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 828 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 829 { NULL, 0 } 830 }; 831 832 static void 833 fill_reject_code(u_short *codep, char *str) 834 { 835 int val; 836 char *s; 837 838 val = strtoul(str, &s, 0); 839 if (s == str || *s != '\0' || val >= 0x100) 840 val = match_token(icmpcodes, str); 841 if (val < 0) 842 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 843 *codep = val; 844 return; 845 } 846 847 static void 848 print_reject_code(uint16_t code) 849 { 850 char const *s = match_value(icmpcodes, code); 851 852 if (s != NULL) 853 printf("unreach %s", s); 854 else 855 printf("unreach %u", code); 856 } 857 858 static struct _s_x icmp6codes[] = { 859 { "no-route", ICMP6_DST_UNREACH_NOROUTE }, 860 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN }, 861 { "address", ICMP6_DST_UNREACH_ADDR }, 862 { "port", ICMP6_DST_UNREACH_NOPORT }, 863 { NULL, 0 } 864 }; 865 866 static void 867 fill_unreach6_code(u_short *codep, char *str) 868 { 869 int val; 870 char *s; 871 872 val = strtoul(str, &s, 0); 873 if (s == str || *s != '\0' || val >= 0x100) 874 val = match_token(icmp6codes, str); 875 if (val < 0) 876 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str); 877 *codep = val; 878 return; 879 } 880 881 static void 882 print_unreach6_code(uint16_t code) 883 { 884 char const *s = match_value(icmp6codes, code); 885 886 if (s != NULL) 887 printf("unreach6 %s", s); 888 else 889 printf("unreach6 %u", code); 890 } 891 892 /* 893 * Returns the number of bits set (from left) in a contiguous bitmask, 894 * or -1 if the mask is not contiguous. 895 * XXX this needs a proper fix. 896 * This effectively works on masks in big-endian (network) format. 897 * when compiled on little endian architectures. 898 * 899 * First bit is bit 7 of the first byte -- note, for MAC addresses, 900 * the first bit on the wire is bit 0 of the first byte. 901 * len is the max length in bits. 902 */ 903 static int 904 contigmask(uint8_t *p, int len) 905 { 906 int i, n; 907 908 for (i=0; i<len ; i++) 909 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 910 break; 911 for (n=i+1; n < len; n++) 912 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 913 return -1; /* mask not contiguous */ 914 return i; 915 } 916 917 /* 918 * print flags set/clear in the two bitmasks passed as parameters. 919 * There is a specialized check for f_tcpflags. 920 */ 921 static void 922 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 923 { 924 char const *comma = ""; 925 int i; 926 uint8_t set = cmd->arg1 & 0xff; 927 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 928 929 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 930 printf(" setup"); 931 return; 932 } 933 934 printf(" %s ", name); 935 for (i=0; list[i].x != 0; i++) { 936 if (set & list[i].x) { 937 set &= ~list[i].x; 938 printf("%s%s", comma, list[i].s); 939 comma = ","; 940 } 941 if (clear & list[i].x) { 942 clear &= ~list[i].x; 943 printf("%s!%s", comma, list[i].s); 944 comma = ","; 945 } 946 } 947 } 948 949 /* 950 * Print the ip address contained in a command. 951 */ 952 static void 953 print_ip(ipfw_insn_ip *cmd, char const *s) 954 { 955 struct hostent *he = NULL; 956 int len = F_LEN((ipfw_insn *)cmd); 957 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 958 959 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 960 961 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 962 printf("me"); 963 return; 964 } 965 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 966 cmd->o.opcode == O_IP_DST_LOOKUP) { 967 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 968 if (len == F_INSN_SIZE(ipfw_insn_u32)) 969 printf(",%u", *a); 970 printf(")"); 971 return; 972 } 973 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 974 uint32_t x, *map = (uint32_t *)&(cmd->mask); 975 int i, j; 976 char comma = '{'; 977 978 x = cmd->o.arg1 - 1; 979 x = htonl( ~x ); 980 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 981 printf("%s/%d", inet_ntoa(cmd->addr), 982 contigmask((uint8_t *)&x, 32)); 983 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 984 x &= 0xff; /* base */ 985 /* 986 * Print bits and ranges. 987 * Locate first bit set (i), then locate first bit unset (j). 988 * If we have 3+ consecutive bits set, then print them as a 989 * range, otherwise only print the initial bit and rescan. 990 */ 991 for (i=0; i < cmd->o.arg1; i++) 992 if (map[i/32] & (1<<(i & 31))) { 993 for (j=i+1; j < cmd->o.arg1; j++) 994 if (!(map[ j/32] & (1<<(j & 31)))) 995 break; 996 printf("%c%d", comma, i+x); 997 if (j>i+2) { /* range has at least 3 elements */ 998 printf("-%d", j-1+x); 999 i = j-1; 1000 } 1001 comma = ','; 1002 } 1003 printf("}"); 1004 return; 1005 } 1006 /* 1007 * len == 2 indicates a single IP, whereas lists of 1 or more 1008 * addr/mask pairs have len = (2n+1). We convert len to n so we 1009 * use that to count the number of entries. 1010 */ 1011 for (len = len / 2; len > 0; len--, a += 2) { 1012 int mb = /* mask length */ 1013 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1014 32 : contigmask((uint8_t *)&(a[1]), 32); 1015 if (mb == 32 && do_resolv) 1016 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1017 if (he != NULL) /* resolved to name */ 1018 printf("%s", he->h_name); 1019 else if (mb == 0) /* any */ 1020 printf("any"); 1021 else { /* numeric IP followed by some kind of mask */ 1022 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 1023 if (mb < 0) 1024 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 1025 else if (mb < 32) 1026 printf("/%d", mb); 1027 } 1028 if (len > 1) 1029 printf(","); 1030 } 1031 } 1032 1033 /* 1034 * prints a MAC address/mask pair 1035 */ 1036 static void 1037 print_mac(uint8_t *addr, uint8_t *mask) 1038 { 1039 int l = contigmask(mask, 48); 1040 1041 if (l == 0) 1042 printf(" any"); 1043 else { 1044 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1045 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1046 if (l == -1) 1047 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1048 mask[0], mask[1], mask[2], 1049 mask[3], mask[4], mask[5]); 1050 else if (l < 48) 1051 printf("/%d", l); 1052 } 1053 } 1054 1055 static void 1056 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1057 { 1058 uint8_t type; 1059 1060 cmd->d[0] = 0; 1061 while (*av) { 1062 if (*av == ',') 1063 av++; 1064 1065 type = strtoul(av, &av, 0); 1066 1067 if (*av != ',' && *av != '\0') 1068 errx(EX_DATAERR, "invalid ICMP type"); 1069 1070 if (type > 31) 1071 errx(EX_DATAERR, "ICMP type out of range"); 1072 1073 cmd->d[0] |= 1 << type; 1074 } 1075 cmd->o.opcode = O_ICMPTYPE; 1076 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1077 } 1078 1079 static void 1080 print_icmptypes(ipfw_insn_u32 *cmd) 1081 { 1082 int i; 1083 char sep= ' '; 1084 1085 printf(" icmptypes"); 1086 for (i = 0; i < 32; i++) { 1087 if ( (cmd->d[0] & (1 << (i))) == 0) 1088 continue; 1089 printf("%c%d", sep, i); 1090 sep = ','; 1091 } 1092 } 1093 1094 /* 1095 * Print the ip address contained in a command. 1096 */ 1097 static void 1098 print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1099 { 1100 struct hostent *he = NULL; 1101 int len = F_LEN((ipfw_insn *) cmd) - 1; 1102 struct in6_addr *a = &(cmd->addr6); 1103 char trad[255]; 1104 1105 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1106 1107 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1108 printf("me6"); 1109 return; 1110 } 1111 if (cmd->o.opcode == O_IP6) { 1112 printf(" ipv6"); 1113 return; 1114 } 1115 1116 /* 1117 * len == 4 indicates a single IP, whereas lists of 1 or more 1118 * addr/mask pairs have len = (2n+1). We convert len to n so we 1119 * use that to count the number of entries. 1120 */ 1121 1122 for (len = len / 4; len > 0; len -= 2, a += 2) { 1123 int mb = /* mask length */ 1124 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1125 128 : contigmask((uint8_t *)&(a[1]), 128); 1126 1127 if (mb == 128 && do_resolv) 1128 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1129 if (he != NULL) /* resolved to name */ 1130 printf("%s", he->h_name); 1131 else if (mb == 0) /* any */ 1132 printf("any"); 1133 else { /* numeric IP followed by some kind of mask */ 1134 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1135 printf("Error ntop in print_ip6\n"); 1136 printf("%s", trad ); 1137 if (mb < 0) /* XXX not really legal... */ 1138 printf(":%s", 1139 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1140 else if (mb < 128) 1141 printf("/%d", mb); 1142 } 1143 if (len > 2) 1144 printf(","); 1145 } 1146 } 1147 1148 static void 1149 fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1150 { 1151 uint8_t type; 1152 1153 cmd->d[0] = 0; 1154 while (*av) { 1155 if (*av == ',') 1156 av++; 1157 type = strtoul(av, &av, 0); 1158 if (*av != ',' && *av != '\0') 1159 errx(EX_DATAERR, "invalid ICMP6 type"); 1160 /* 1161 * XXX: shouldn't this be 0xFF? I can't see any reason why 1162 * we shouldn't be able to filter all possiable values 1163 * regardless of the ability of the rest of the kernel to do 1164 * anything useful with them. 1165 */ 1166 if (type > ICMP6_MAXTYPE) 1167 errx(EX_DATAERR, "ICMP6 type out of range"); 1168 cmd->d[type / 32] |= ( 1 << (type % 32)); 1169 } 1170 cmd->o.opcode = O_ICMP6TYPE; 1171 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1172 } 1173 1174 1175 static void 1176 print_icmp6types(ipfw_insn_u32 *cmd) 1177 { 1178 int i, j; 1179 char sep= ' '; 1180 1181 printf(" ipv6 icmp6types"); 1182 for (i = 0; i < 7; i++) 1183 for (j=0; j < 32; ++j) { 1184 if ( (cmd->d[i] & (1 << (j))) == 0) 1185 continue; 1186 printf("%c%d", sep, (i*32 + j)); 1187 sep = ','; 1188 } 1189 } 1190 1191 static void 1192 print_flow6id( ipfw_insn_u32 *cmd) 1193 { 1194 uint16_t i, limit = cmd->o.arg1; 1195 char sep = ','; 1196 1197 printf(" flow-id "); 1198 for( i=0; i < limit; ++i) { 1199 if (i == limit - 1) 1200 sep = ' '; 1201 printf("%d%c", cmd->d[i], sep); 1202 } 1203 } 1204 1205 /* structure and define for the extension header in ipv6 */ 1206 static struct _s_x ext6hdrcodes[] = { 1207 { "frag", EXT_FRAGMENT }, 1208 { "hopopt", EXT_HOPOPTS }, 1209 { "route", EXT_ROUTING }, 1210 { "dstopt", EXT_DSTOPTS }, 1211 { "ah", EXT_AH }, 1212 { "esp", EXT_ESP }, 1213 { NULL, 0 } 1214 }; 1215 1216 /* fills command for the extension header filtering */ 1217 int 1218 fill_ext6hdr( ipfw_insn *cmd, char *av) 1219 { 1220 int tok; 1221 char *s = av; 1222 1223 cmd->arg1 = 0; 1224 1225 while(s) { 1226 av = strsep( &s, ",") ; 1227 tok = match_token(ext6hdrcodes, av); 1228 switch (tok) { 1229 case EXT_FRAGMENT: 1230 cmd->arg1 |= EXT_FRAGMENT; 1231 break; 1232 1233 case EXT_HOPOPTS: 1234 cmd->arg1 |= EXT_HOPOPTS; 1235 break; 1236 1237 case EXT_ROUTING: 1238 cmd->arg1 |= EXT_ROUTING; 1239 break; 1240 1241 case EXT_DSTOPTS: 1242 cmd->arg1 |= EXT_DSTOPTS; 1243 break; 1244 1245 case EXT_AH: 1246 cmd->arg1 |= EXT_AH; 1247 break; 1248 1249 case EXT_ESP: 1250 cmd->arg1 |= EXT_ESP; 1251 break; 1252 1253 default: 1254 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1255 break; 1256 } 1257 } 1258 if (cmd->arg1 == 0 ) 1259 return 0; 1260 cmd->opcode = O_EXT_HDR; 1261 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1262 return 1; 1263 } 1264 1265 void 1266 print_ext6hdr( ipfw_insn *cmd ) 1267 { 1268 char sep = ' '; 1269 1270 printf(" extension header:"); 1271 if (cmd->arg1 & EXT_FRAGMENT ) { 1272 printf("%cfragmentation", sep); 1273 sep = ','; 1274 } 1275 if (cmd->arg1 & EXT_HOPOPTS ) { 1276 printf("%chop options", sep); 1277 sep = ','; 1278 } 1279 if (cmd->arg1 & EXT_ROUTING ) { 1280 printf("%crouting options", sep); 1281 sep = ','; 1282 } 1283 if (cmd->arg1 & EXT_DSTOPTS ) { 1284 printf("%cdestination options", sep); 1285 sep = ','; 1286 } 1287 if (cmd->arg1 & EXT_AH ) { 1288 printf("%cauthentication header", sep); 1289 sep = ','; 1290 } 1291 if (cmd->arg1 & EXT_ESP ) { 1292 printf("%cencapsulated security payload", sep); 1293 } 1294 } 1295 1296 /* 1297 * show_ipfw() prints the body of an ipfw rule. 1298 * Because the standard rule has at least proto src_ip dst_ip, we use 1299 * a helper function to produce these entries if not provided explicitly. 1300 * The first argument is the list of fields we have, the second is 1301 * the list of fields we want to be printed. 1302 * 1303 * Special cases if we have provided a MAC header: 1304 * + if the rule does not contain IP addresses/ports, do not print them; 1305 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1306 * 1307 * Once we have 'have_options', IP header fields are printed as options. 1308 */ 1309 #define HAVE_PROTO 0x0001 1310 #define HAVE_SRCIP 0x0002 1311 #define HAVE_DSTIP 0x0004 1312 #define HAVE_MAC 0x0008 1313 #define HAVE_MACTYPE 0x0010 1314 #define HAVE_PROTO4 0x0040 1315 #define HAVE_PROTO6 0x0080 1316 #define HAVE_OPTIONS 0x8000 1317 1318 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1319 static void 1320 show_prerequisites(int *flags, int want, int cmd) 1321 { 1322 if (comment_only) 1323 return; 1324 if ( (*flags & HAVE_IP) == HAVE_IP) 1325 *flags |= HAVE_OPTIONS; 1326 1327 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 1328 cmd != O_MAC_TYPE) { 1329 /* 1330 * mac-type was optimized out by the compiler, 1331 * restore it 1332 */ 1333 printf(" any"); 1334 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 1335 return; 1336 } 1337 if ( !(*flags & HAVE_OPTIONS)) { 1338 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1339 if ( (*flags & HAVE_PROTO4)) 1340 printf(" ip4"); 1341 else if ( (*flags & HAVE_PROTO6)) 1342 printf(" ip6"); 1343 else 1344 printf(" ip"); 1345 1346 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1347 printf(" from any"); 1348 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1349 printf(" to any"); 1350 } 1351 *flags |= want; 1352 } 1353 1354 static void 1355 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1356 { 1357 static int twidth = 0; 1358 int l; 1359 ipfw_insn *cmd; 1360 char *comment = NULL; /* ptr to comment if we have one */ 1361 int proto = 0; /* default */ 1362 int flags = 0; /* prerequisites */ 1363 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1364 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1365 int or_block = 0; /* we are in an or block */ 1366 uint32_t set_disable; 1367 1368 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1369 1370 if (set_disable & (1 << rule->set)) { /* disabled */ 1371 if (!show_sets) 1372 return; 1373 else 1374 printf("# DISABLED "); 1375 } 1376 printf("%05u ", rule->rulenum); 1377 1378 if (pcwidth>0 || bcwidth>0) 1379 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1380 bcwidth, align_uint64(&rule->bcnt)); 1381 1382 if (do_time == 2) 1383 printf("%10u ", rule->timestamp); 1384 else if (do_time == 1) { 1385 char timestr[30]; 1386 time_t t = (time_t)0; 1387 1388 if (twidth == 0) { 1389 strcpy(timestr, ctime(&t)); 1390 *strchr(timestr, '\n') = '\0'; 1391 twidth = strlen(timestr); 1392 } 1393 if (rule->timestamp) { 1394 #if _FreeBSD_version < 500000 /* XXX check */ 1395 #define _long_to_time(x) (time_t)(x) 1396 #endif 1397 t = _long_to_time(rule->timestamp); 1398 1399 strcpy(timestr, ctime(&t)); 1400 *strchr(timestr, '\n') = '\0'; 1401 printf("%s ", timestr); 1402 } else { 1403 printf("%*s", twidth, " "); 1404 } 1405 } 1406 1407 if (show_sets) 1408 printf("set %d ", rule->set); 1409 1410 /* 1411 * print the optional "match probability" 1412 */ 1413 if (rule->cmd_len > 0) { 1414 cmd = rule->cmd ; 1415 if (cmd->opcode == O_PROB) { 1416 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1417 double d = 1.0 * p->d[0]; 1418 1419 d = (d / 0x7fffffff); 1420 printf("prob %f ", d); 1421 } 1422 } 1423 1424 /* 1425 * first print actions 1426 */ 1427 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1428 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1429 switch(cmd->opcode) { 1430 case O_CHECK_STATE: 1431 printf("check-state"); 1432 flags = HAVE_IP; /* avoid printing anything else */ 1433 break; 1434 1435 case O_ACCEPT: 1436 printf("allow"); 1437 break; 1438 1439 case O_COUNT: 1440 printf("count"); 1441 break; 1442 1443 case O_DENY: 1444 printf("deny"); 1445 break; 1446 1447 case O_REJECT: 1448 if (cmd->arg1 == ICMP_REJECT_RST) 1449 printf("reset"); 1450 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1451 printf("reject"); 1452 else 1453 print_reject_code(cmd->arg1); 1454 break; 1455 1456 case O_UNREACH6: 1457 if (cmd->arg1 == ICMP6_UNREACH_RST) 1458 printf("reset6"); 1459 else 1460 print_unreach6_code(cmd->arg1); 1461 break; 1462 1463 case O_SKIPTO: 1464 printf("skipto %u", cmd->arg1); 1465 break; 1466 1467 case O_PIPE: 1468 printf("pipe %u", cmd->arg1); 1469 break; 1470 1471 case O_QUEUE: 1472 printf("queue %u", cmd->arg1); 1473 break; 1474 1475 case O_DIVERT: 1476 printf("divert %u", cmd->arg1); 1477 break; 1478 1479 case O_TEE: 1480 printf("tee %u", cmd->arg1); 1481 break; 1482 1483 case O_NETGRAPH: 1484 printf("netgraph %u", cmd->arg1); 1485 break; 1486 1487 case O_NGTEE: 1488 printf("ngtee %u", cmd->arg1); 1489 break; 1490 1491 case O_FORWARD_IP: 1492 { 1493 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1494 1495 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1496 if (s->sa.sin_port) 1497 printf(",%d", s->sa.sin_port); 1498 } 1499 break; 1500 1501 case O_LOG: /* O_LOG is printed last */ 1502 logptr = (ipfw_insn_log *)cmd; 1503 break; 1504 1505 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1506 altqptr = (ipfw_insn_altq *)cmd; 1507 break; 1508 1509 default: 1510 printf("** unrecognized action %d len %d ", 1511 cmd->opcode, cmd->len); 1512 } 1513 } 1514 if (logptr) { 1515 if (logptr->max_log > 0) 1516 printf(" log logamount %d", logptr->max_log); 1517 else 1518 printf(" log"); 1519 } 1520 if (altqptr) { 1521 const char *qname; 1522 1523 qname = altq_qid_to_name(altqptr->qid); 1524 if (qname == NULL) 1525 printf(" altq ?<%u>", altqptr->qid); 1526 else 1527 printf(" altq %s", qname); 1528 } 1529 1530 /* 1531 * then print the body. 1532 */ 1533 for (l = rule->act_ofs, cmd = rule->cmd ; 1534 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1535 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1536 continue; 1537 if (cmd->opcode == O_IP4) { 1538 flags |= HAVE_PROTO4; 1539 break; 1540 } else if (cmd->opcode == O_IP6) { 1541 flags |= HAVE_PROTO6; 1542 break; 1543 } 1544 } 1545 if (rule->_pad & 1) { /* empty rules before options */ 1546 if (!do_compact) { 1547 show_prerequisites(&flags, HAVE_PROTO, 0); 1548 printf(" from any to any"); 1549 } 1550 flags |= HAVE_IP | HAVE_OPTIONS; 1551 } 1552 1553 if (comment_only) 1554 comment = "..."; 1555 1556 for (l = rule->act_ofs, cmd = rule->cmd ; 1557 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1558 /* useful alias */ 1559 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1560 1561 if (comment_only) { 1562 if (cmd->opcode != O_NOP) 1563 continue; 1564 printf(" // %s\n", (char *)(cmd + 1)); 1565 return; 1566 } 1567 1568 show_prerequisites(&flags, 0, cmd->opcode); 1569 1570 switch(cmd->opcode) { 1571 case O_PROB: 1572 break; /* done already */ 1573 1574 case O_PROBE_STATE: 1575 break; /* no need to print anything here */ 1576 1577 case O_MACADDR2: { 1578 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1579 1580 if ((cmd->len & F_OR) && !or_block) 1581 printf(" {"); 1582 if (cmd->len & F_NOT) 1583 printf(" not"); 1584 printf(" MAC"); 1585 flags |= HAVE_MAC; 1586 print_mac(m->addr, m->mask); 1587 print_mac(m->addr + 6, m->mask + 6); 1588 } 1589 break; 1590 1591 case O_MAC_TYPE: 1592 if ((cmd->len & F_OR) && !or_block) 1593 printf(" {"); 1594 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1595 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1596 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1597 break; 1598 1599 case O_IP_SRC: 1600 case O_IP_SRC_LOOKUP: 1601 case O_IP_SRC_MASK: 1602 case O_IP_SRC_ME: 1603 case O_IP_SRC_SET: 1604 show_prerequisites(&flags, HAVE_PROTO, 0); 1605 if (!(flags & HAVE_SRCIP)) 1606 printf(" from"); 1607 if ((cmd->len & F_OR) && !or_block) 1608 printf(" {"); 1609 print_ip((ipfw_insn_ip *)cmd, 1610 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1611 flags |= HAVE_SRCIP; 1612 break; 1613 1614 case O_IP_DST: 1615 case O_IP_DST_LOOKUP: 1616 case O_IP_DST_MASK: 1617 case O_IP_DST_ME: 1618 case O_IP_DST_SET: 1619 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1620 if (!(flags & HAVE_DSTIP)) 1621 printf(" to"); 1622 if ((cmd->len & F_OR) && !or_block) 1623 printf(" {"); 1624 print_ip((ipfw_insn_ip *)cmd, 1625 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1626 flags |= HAVE_DSTIP; 1627 break; 1628 1629 case O_IP6_SRC: 1630 case O_IP6_SRC_MASK: 1631 case O_IP6_SRC_ME: 1632 show_prerequisites(&flags, HAVE_PROTO, 0); 1633 if (!(flags & HAVE_SRCIP)) 1634 printf(" from"); 1635 if ((cmd->len & F_OR) && !or_block) 1636 printf(" {"); 1637 print_ip6((ipfw_insn_ip6 *)cmd, 1638 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1639 flags |= HAVE_SRCIP | HAVE_PROTO; 1640 break; 1641 1642 case O_IP6_DST: 1643 case O_IP6_DST_MASK: 1644 case O_IP6_DST_ME: 1645 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1646 if (!(flags & HAVE_DSTIP)) 1647 printf(" to"); 1648 if ((cmd->len & F_OR) && !or_block) 1649 printf(" {"); 1650 print_ip6((ipfw_insn_ip6 *)cmd, 1651 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1652 flags |= HAVE_DSTIP; 1653 break; 1654 1655 case O_FLOW6ID: 1656 print_flow6id( (ipfw_insn_u32 *) cmd ); 1657 flags |= HAVE_OPTIONS; 1658 break; 1659 1660 case O_IP_DSTPORT: 1661 show_prerequisites(&flags, HAVE_IP, 0); 1662 case O_IP_SRCPORT: 1663 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1664 if ((cmd->len & F_OR) && !or_block) 1665 printf(" {"); 1666 print_newports((ipfw_insn_u16 *)cmd, proto, 1667 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1668 break; 1669 1670 case O_PROTO: { 1671 struct protoent *pe = NULL; 1672 1673 if ((cmd->len & F_OR) && !or_block) 1674 printf(" {"); 1675 if (cmd->len & F_NOT) 1676 printf(" not"); 1677 proto = cmd->arg1; 1678 pe = getprotobynumber(cmd->arg1); 1679 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1680 !(flags & HAVE_PROTO)) 1681 show_prerequisites(&flags, 1682 HAVE_IP | HAVE_OPTIONS, 0); 1683 if (flags & HAVE_OPTIONS) 1684 printf(" proto"); 1685 if (pe) 1686 printf(" %s", pe->p_name); 1687 else 1688 printf(" %u", cmd->arg1); 1689 } 1690 flags |= HAVE_PROTO; 1691 break; 1692 1693 default: /*options ... */ 1694 if (!(cmd->len & (F_OR|F_NOT))) 1695 if (((cmd->opcode == O_IP6) && 1696 (flags & HAVE_PROTO6)) || 1697 ((cmd->opcode == O_IP4) && 1698 (flags & HAVE_PROTO4))) 1699 break; 1700 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1701 if ((cmd->len & F_OR) && !or_block) 1702 printf(" {"); 1703 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1704 printf(" not"); 1705 switch(cmd->opcode) { 1706 case O_FRAG: 1707 printf(" frag"); 1708 break; 1709 1710 case O_IN: 1711 printf(cmd->len & F_NOT ? " out" : " in"); 1712 break; 1713 1714 case O_DIVERTED: 1715 switch (cmd->arg1) { 1716 case 3: 1717 printf(" diverted"); 1718 break; 1719 case 1: 1720 printf(" diverted-loopback"); 1721 break; 1722 case 2: 1723 printf(" diverted-output"); 1724 break; 1725 default: 1726 printf(" diverted-?<%u>", cmd->arg1); 1727 break; 1728 } 1729 break; 1730 1731 case O_LAYER2: 1732 printf(" layer2"); 1733 break; 1734 case O_XMIT: 1735 case O_RECV: 1736 case O_VIA: 1737 { 1738 char const *s; 1739 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1740 1741 if (cmd->opcode == O_XMIT) 1742 s = "xmit"; 1743 else if (cmd->opcode == O_RECV) 1744 s = "recv"; 1745 else /* if (cmd->opcode == O_VIA) */ 1746 s = "via"; 1747 if (cmdif->name[0] == '\0') 1748 printf(" %s %s", s, 1749 inet_ntoa(cmdif->p.ip)); 1750 else 1751 printf(" %s %s", s, cmdif->name); 1752 1753 break; 1754 } 1755 case O_IPID: 1756 if (F_LEN(cmd) == 1) 1757 printf(" ipid %u", cmd->arg1 ); 1758 else 1759 print_newports((ipfw_insn_u16 *)cmd, 0, 1760 O_IPID); 1761 break; 1762 1763 case O_IPTTL: 1764 if (F_LEN(cmd) == 1) 1765 printf(" ipttl %u", cmd->arg1 ); 1766 else 1767 print_newports((ipfw_insn_u16 *)cmd, 0, 1768 O_IPTTL); 1769 break; 1770 1771 case O_IPVER: 1772 printf(" ipver %u", cmd->arg1 ); 1773 break; 1774 1775 case O_IPPRECEDENCE: 1776 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1777 break; 1778 1779 case O_IPLEN: 1780 if (F_LEN(cmd) == 1) 1781 printf(" iplen %u", cmd->arg1 ); 1782 else 1783 print_newports((ipfw_insn_u16 *)cmd, 0, 1784 O_IPLEN); 1785 break; 1786 1787 case O_IPOPT: 1788 print_flags("ipoptions", cmd, f_ipopts); 1789 break; 1790 1791 case O_IPTOS: 1792 print_flags("iptos", cmd, f_iptos); 1793 break; 1794 1795 case O_ICMPTYPE: 1796 print_icmptypes((ipfw_insn_u32 *)cmd); 1797 break; 1798 1799 case O_ESTAB: 1800 printf(" established"); 1801 break; 1802 1803 case O_TCPDATALEN: 1804 if (F_LEN(cmd) == 1) 1805 printf(" tcpdatalen %u", cmd->arg1 ); 1806 else 1807 print_newports((ipfw_insn_u16 *)cmd, 0, 1808 O_TCPDATALEN); 1809 break; 1810 1811 case O_TCPFLAGS: 1812 print_flags("tcpflags", cmd, f_tcpflags); 1813 break; 1814 1815 case O_TCPOPTS: 1816 print_flags("tcpoptions", cmd, f_tcpopts); 1817 break; 1818 1819 case O_TCPWIN: 1820 printf(" tcpwin %d", ntohs(cmd->arg1)); 1821 break; 1822 1823 case O_TCPACK: 1824 printf(" tcpack %d", ntohl(cmd32->d[0])); 1825 break; 1826 1827 case O_TCPSEQ: 1828 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1829 break; 1830 1831 case O_UID: 1832 { 1833 struct passwd *pwd = getpwuid(cmd32->d[0]); 1834 1835 if (pwd) 1836 printf(" uid %s", pwd->pw_name); 1837 else 1838 printf(" uid %u", cmd32->d[0]); 1839 } 1840 break; 1841 1842 case O_GID: 1843 { 1844 struct group *grp = getgrgid(cmd32->d[0]); 1845 1846 if (grp) 1847 printf(" gid %s", grp->gr_name); 1848 else 1849 printf(" gid %u", cmd32->d[0]); 1850 } 1851 break; 1852 1853 case O_JAIL: 1854 printf(" jail %d", cmd32->d[0]); 1855 break; 1856 1857 case O_VERREVPATH: 1858 printf(" verrevpath"); 1859 break; 1860 1861 case O_VERSRCREACH: 1862 printf(" versrcreach"); 1863 break; 1864 1865 case O_ANTISPOOF: 1866 printf(" antispoof"); 1867 break; 1868 1869 case O_IPSEC: 1870 printf(" ipsec"); 1871 break; 1872 1873 case O_NOP: 1874 comment = (char *)(cmd + 1); 1875 break; 1876 1877 case O_KEEP_STATE: 1878 printf(" keep-state"); 1879 break; 1880 1881 case O_LIMIT: 1882 { 1883 struct _s_x *p = limit_masks; 1884 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1885 uint8_t x = c->limit_mask; 1886 char const *comma = " "; 1887 1888 printf(" limit"); 1889 for (; p->x != 0 ; p++) 1890 if ((x & p->x) == p->x) { 1891 x &= ~p->x; 1892 printf("%s%s", comma, p->s); 1893 comma = ","; 1894 } 1895 printf(" %d", c->conn_limit); 1896 } 1897 break; 1898 1899 case O_IP6: 1900 printf(" ipv6"); 1901 break; 1902 1903 case O_IP4: 1904 printf(" ipv4"); 1905 break; 1906 1907 case O_ICMP6TYPE: 1908 print_icmp6types((ipfw_insn_u32 *)cmd); 1909 break; 1910 1911 case O_EXT_HDR: 1912 print_ext6hdr( (ipfw_insn *) cmd ); 1913 break; 1914 1915 default: 1916 printf(" [opcode %d len %d]", 1917 cmd->opcode, cmd->len); 1918 } 1919 } 1920 if (cmd->len & F_OR) { 1921 printf(" or"); 1922 or_block = 1; 1923 } else if (or_block) { 1924 printf(" }"); 1925 or_block = 0; 1926 } 1927 } 1928 show_prerequisites(&flags, HAVE_IP, 0); 1929 if (comment) 1930 printf(" // %s", comment); 1931 printf("\n"); 1932 } 1933 1934 static void 1935 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1936 { 1937 struct protoent *pe; 1938 struct in_addr a; 1939 uint16_t rulenum; 1940 1941 if (!do_expired) { 1942 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1943 return; 1944 } 1945 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1946 printf("%05d", rulenum); 1947 if (pcwidth>0 || bcwidth>0) 1948 printf(" %*llu %*llu (%ds)", pcwidth, 1949 align_uint64(&d->pcnt), bcwidth, 1950 align_uint64(&d->bcnt), d->expire); 1951 switch (d->dyn_type) { 1952 case O_LIMIT_PARENT: 1953 printf(" PARENT %d", d->count); 1954 break; 1955 case O_LIMIT: 1956 printf(" LIMIT"); 1957 break; 1958 case O_KEEP_STATE: /* bidir, no mask */ 1959 printf(" STATE"); 1960 break; 1961 } 1962 1963 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1964 printf(" %s", pe->p_name); 1965 else 1966 printf(" proto %u", d->id.proto); 1967 1968 a.s_addr = htonl(d->id.src_ip); 1969 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1970 1971 a.s_addr = htonl(d->id.dst_ip); 1972 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1973 printf("\n"); 1974 } 1975 1976 static int 1977 sort_q(const void *pa, const void *pb) 1978 { 1979 int rev = (do_sort < 0); 1980 int field = rev ? -do_sort : do_sort; 1981 long long res = 0; 1982 const struct dn_flow_queue *a = pa; 1983 const struct dn_flow_queue *b = pb; 1984 1985 switch (field) { 1986 case 1: /* pkts */ 1987 res = a->len - b->len; 1988 break; 1989 case 2: /* bytes */ 1990 res = a->len_bytes - b->len_bytes; 1991 break; 1992 1993 case 3: /* tot pkts */ 1994 res = a->tot_pkts - b->tot_pkts; 1995 break; 1996 1997 case 4: /* tot bytes */ 1998 res = a->tot_bytes - b->tot_bytes; 1999 break; 2000 } 2001 if (res < 0) 2002 res = -1; 2003 if (res > 0) 2004 res = 1; 2005 return (int)(rev ? res : -res); 2006 } 2007 2008 static void 2009 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 2010 { 2011 int l; 2012 int index_printed, indexes = 0; 2013 char buff[255]; 2014 struct protoent *pe; 2015 2016 if (fs->rq_elements == 0) 2017 return; 2018 2019 if (do_sort != 0) 2020 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 2021 2022 /* Print IPv4 flows */ 2023 index_printed = 0; 2024 for (l = 0; l < fs->rq_elements; l++) { 2025 struct in_addr ina; 2026 2027 /* XXX: Should check for IPv4 flows */ 2028 if (IS_IP6_FLOW_ID(&(q[l].id))) 2029 continue; 2030 2031 if (!index_printed) { 2032 index_printed = 1; 2033 if (indexes > 0) /* currently a no-op */ 2034 printf("\n"); 2035 indexes++; 2036 printf(" " 2037 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 2038 fs->flow_mask.proto, 2039 fs->flow_mask.src_ip, fs->flow_mask.src_port, 2040 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 2041 2042 printf("BKT Prot ___Source IP/port____ " 2043 "____Dest. IP/port____ " 2044 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2045 } 2046 2047 printf("%3d ", q[l].hash_slot); 2048 pe = getprotobynumber(q[l].id.proto); 2049 if (pe) 2050 printf("%-4s ", pe->p_name); 2051 else 2052 printf("%4u ", q[l].id.proto); 2053 ina.s_addr = htonl(q[l].id.src_ip); 2054 printf("%15s/%-5d ", 2055 inet_ntoa(ina), q[l].id.src_port); 2056 ina.s_addr = htonl(q[l].id.dst_ip); 2057 printf("%15s/%-5d ", 2058 inet_ntoa(ina), q[l].id.dst_port); 2059 printf("%4qu %8qu %2u %4u %3u\n", 2060 q[l].tot_pkts, q[l].tot_bytes, 2061 q[l].len, q[l].len_bytes, q[l].drops); 2062 if (verbose) 2063 printf(" S %20qd F %20qd\n", 2064 q[l].S, q[l].F); 2065 } 2066 2067 /* Print IPv6 flows */ 2068 index_printed = 0; 2069 for (l = 0; l < fs->rq_elements; l++) { 2070 if (!IS_IP6_FLOW_ID(&(q[l].id))) 2071 continue; 2072 2073 if (!index_printed) { 2074 index_printed = 1; 2075 if (indexes > 0) 2076 printf("\n"); 2077 indexes++; 2078 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 2079 fs->flow_mask.proto, fs->flow_mask.flow_id6); 2080 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 2081 buff, sizeof(buff)); 2082 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 2083 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 2084 buff, sizeof(buff) ); 2085 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 2086 2087 printf("BKT ___Prot___ _flow-id_ " 2088 "______________Source IPv6/port_______________ " 2089 "_______________Dest. IPv6/port_______________ " 2090 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2091 } 2092 printf("%3d ", q[l].hash_slot); 2093 pe = getprotobynumber(q[l].id.proto); 2094 if (pe != NULL) 2095 printf("%9s ", pe->p_name); 2096 else 2097 printf("%9u ", q[l].id.proto); 2098 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2099 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2100 q[l].id.src_port); 2101 printf(" %39s/%-5d ", 2102 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2103 q[l].id.dst_port); 2104 printf(" %4qu %8qu %2u %4u %3u\n", 2105 q[l].tot_pkts, q[l].tot_bytes, 2106 q[l].len, q[l].len_bytes, q[l].drops); 2107 if (verbose) 2108 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2109 } 2110 } 2111 2112 static void 2113 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2114 { 2115 int l; 2116 char qs[30]; 2117 char plr[30]; 2118 char red[90]; /* Display RED parameters */ 2119 2120 l = fs->qsize; 2121 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2122 if (l >= 8192) 2123 sprintf(qs, "%d KB", l / 1024); 2124 else 2125 sprintf(qs, "%d B", l); 2126 } else 2127 sprintf(qs, "%3d sl.", l); 2128 if (fs->plr) 2129 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2130 else 2131 plr[0] = '\0'; 2132 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2133 sprintf(red, 2134 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2135 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2136 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2137 SCALE_VAL(fs->min_th), 2138 SCALE_VAL(fs->max_th), 2139 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2140 else 2141 sprintf(red, "droptail"); 2142 2143 printf("%s %s%s %d queues (%d buckets) %s\n", 2144 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2145 } 2146 2147 static void 2148 list_pipes(void *data, uint nbytes, int ac, char *av[]) 2149 { 2150 int rulenum; 2151 void *next = data; 2152 struct dn_pipe *p = (struct dn_pipe *) data; 2153 struct dn_flow_set *fs; 2154 struct dn_flow_queue *q; 2155 int l; 2156 2157 if (ac > 0) 2158 rulenum = strtoul(*av++, NULL, 10); 2159 else 2160 rulenum = 0; 2161 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2162 double b = p->bandwidth; 2163 char buf[30]; 2164 char prefix[80]; 2165 2166 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 2167 break; /* done with pipes, now queues */ 2168 2169 /* 2170 * compute length, as pipe have variable size 2171 */ 2172 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2173 next = (char *)p + l; 2174 nbytes -= l; 2175 2176 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2177 continue; 2178 2179 /* 2180 * Print rate (or clocking interface) 2181 */ 2182 if (p->if_name[0] != '\0') 2183 sprintf(buf, "%s", p->if_name); 2184 else if (b == 0) 2185 sprintf(buf, "unlimited"); 2186 else if (b >= 1000000) 2187 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2188 else if (b >= 1000) 2189 sprintf(buf, "%7.3f Kbit/s", b/1000); 2190 else 2191 sprintf(buf, "%7.3f bit/s ", b); 2192 2193 sprintf(prefix, "%05d: %s %4d ms ", 2194 p->pipe_nr, buf, p->delay); 2195 print_flowset_parms(&(p->fs), prefix); 2196 if (verbose) 2197 printf(" V %20qd\n", p->V >> MY_M); 2198 2199 q = (struct dn_flow_queue *)(p+1); 2200 list_queues(&(p->fs), q); 2201 } 2202 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2203 char prefix[80]; 2204 2205 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 2206 break; 2207 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2208 next = (char *)fs + l; 2209 nbytes -= l; 2210 2211 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2212 (rulenum != fs->parent_nr && do_pipe == 1))) { 2213 continue; 2214 } 2215 2216 q = (struct dn_flow_queue *)(fs+1); 2217 sprintf(prefix, "q%05d: weight %d pipe %d ", 2218 fs->fs_nr, fs->weight, fs->parent_nr); 2219 print_flowset_parms(fs, prefix); 2220 list_queues(fs, q); 2221 } 2222 } 2223 2224 /* 2225 * This one handles all set-related commands 2226 * ipfw set { show | enable | disable } 2227 * ipfw set swap X Y 2228 * ipfw set move X to Y 2229 * ipfw set move rule X to Y 2230 */ 2231 static void 2232 sets_handler(int ac, char *av[]) 2233 { 2234 uint32_t set_disable, masks[2]; 2235 int i, nbytes; 2236 uint16_t rulenum; 2237 uint8_t cmd, new_set; 2238 2239 ac--; 2240 av++; 2241 2242 if (!ac) 2243 errx(EX_USAGE, "set needs command"); 2244 if (_substrcmp(*av, "show") == 0) { 2245 void *data; 2246 char const *msg; 2247 2248 nbytes = sizeof(struct ip_fw); 2249 if ((data = calloc(1, nbytes)) == NULL) 2250 err(EX_OSERR, "calloc"); 2251 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2252 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2253 bcopy(&((struct ip_fw *)data)->next_rule, 2254 &set_disable, sizeof(set_disable)); 2255 2256 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2257 if ((set_disable & (1<<i))) { 2258 printf("%s %d", msg, i); 2259 msg = ""; 2260 } 2261 msg = (set_disable) ? " enable" : "enable"; 2262 for (i = 0; i < RESVD_SET; i++) 2263 if (!(set_disable & (1<<i))) { 2264 printf("%s %d", msg, i); 2265 msg = ""; 2266 } 2267 printf("\n"); 2268 } else if (_substrcmp(*av, "swap") == 0) { 2269 ac--; av++; 2270 if (ac != 2) 2271 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2272 rulenum = atoi(av[0]); 2273 new_set = atoi(av[1]); 2274 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2275 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2276 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2277 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2278 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2279 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2280 } else if (_substrcmp(*av, "move") == 0) { 2281 ac--; av++; 2282 if (ac && _substrcmp(*av, "rule") == 0) { 2283 cmd = 2; 2284 ac--; av++; 2285 } else 2286 cmd = 3; 2287 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2288 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2289 rulenum = atoi(av[0]); 2290 new_set = atoi(av[2]); 2291 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2292 (cmd == 2 && rulenum == 65535) ) 2293 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2294 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2295 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2296 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2297 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2298 } else if (_substrcmp(*av, "disable") == 0 || 2299 _substrcmp(*av, "enable") == 0 ) { 2300 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2301 2302 ac--; av++; 2303 masks[0] = masks[1] = 0; 2304 2305 while (ac) { 2306 if (isdigit(**av)) { 2307 i = atoi(*av); 2308 if (i < 0 || i > RESVD_SET) 2309 errx(EX_DATAERR, 2310 "invalid set number %d\n", i); 2311 masks[which] |= (1<<i); 2312 } else if (_substrcmp(*av, "disable") == 0) 2313 which = 0; 2314 else if (_substrcmp(*av, "enable") == 0) 2315 which = 1; 2316 else 2317 errx(EX_DATAERR, 2318 "invalid set command %s\n", *av); 2319 av++; ac--; 2320 } 2321 if ( (masks[0] & masks[1]) != 0 ) 2322 errx(EX_DATAERR, 2323 "cannot enable and disable the same set\n"); 2324 2325 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2326 if (i) 2327 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2328 } else 2329 errx(EX_USAGE, "invalid set command %s\n", *av); 2330 } 2331 2332 static void 2333 sysctl_handler(int ac, char *av[], int which) 2334 { 2335 ac--; 2336 av++; 2337 2338 if (ac == 0) { 2339 warnx("missing keyword to enable/disable\n"); 2340 } else if (_substrcmp(*av, "firewall") == 0) { 2341 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2342 &which, sizeof(which)); 2343 } else if (_substrcmp(*av, "one_pass") == 0) { 2344 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2345 &which, sizeof(which)); 2346 } else if (_substrcmp(*av, "debug") == 0) { 2347 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2348 &which, sizeof(which)); 2349 } else if (_substrcmp(*av, "verbose") == 0) { 2350 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2351 &which, sizeof(which)); 2352 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2353 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2354 &which, sizeof(which)); 2355 } else if (_substrcmp(*av, "altq") == 0) { 2356 altq_set_enabled(which); 2357 } else { 2358 warnx("unrecognize enable/disable keyword: %s\n", *av); 2359 } 2360 } 2361 2362 static void 2363 list(int ac, char *av[], int show_counters) 2364 { 2365 struct ip_fw *r; 2366 ipfw_dyn_rule *dynrules, *d; 2367 2368 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2369 char *lim; 2370 void *data = NULL; 2371 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2372 int exitval = EX_OK; 2373 int lac; 2374 char **lav; 2375 u_long rnum, last; 2376 char *endptr; 2377 int seen = 0; 2378 2379 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2380 int nalloc = 1024; /* start somewhere... */ 2381 2382 last = 0; 2383 2384 if (test_only) { 2385 fprintf(stderr, "Testing only, list disabled\n"); 2386 return; 2387 } 2388 2389 ac--; 2390 av++; 2391 2392 /* get rules or pipes from kernel, resizing array as necessary */ 2393 nbytes = nalloc; 2394 2395 while (nbytes >= nalloc) { 2396 nalloc = nalloc * 2 + 200; 2397 nbytes = nalloc; 2398 if ((data = realloc(data, nbytes)) == NULL) 2399 err(EX_OSERR, "realloc"); 2400 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2401 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2402 do_pipe ? "DUMMYNET" : "FW"); 2403 } 2404 2405 if (do_pipe) { 2406 list_pipes(data, nbytes, ac, av); 2407 goto done; 2408 } 2409 2410 /* 2411 * Count static rules. They have variable size so we 2412 * need to scan the list to count them. 2413 */ 2414 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2415 r->rulenum < 65535 && (char *)r < lim; 2416 ++nstat, r = NEXT(r) ) 2417 ; /* nothing */ 2418 2419 /* 2420 * Count dynamic rules. This is easier as they have 2421 * fixed size. 2422 */ 2423 r = NEXT(r); 2424 dynrules = (ipfw_dyn_rule *)r ; 2425 n = (char *)r - (char *)data; 2426 ndyn = (nbytes - n) / sizeof *dynrules; 2427 2428 /* if showing stats, figure out column widths ahead of time */ 2429 bcwidth = pcwidth = 0; 2430 if (show_counters) { 2431 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2432 /* packet counter */ 2433 width = snprintf(NULL, 0, "%llu", 2434 align_uint64(&r->pcnt)); 2435 if (width > pcwidth) 2436 pcwidth = width; 2437 2438 /* byte counter */ 2439 width = snprintf(NULL, 0, "%llu", 2440 align_uint64(&r->bcnt)); 2441 if (width > bcwidth) 2442 bcwidth = width; 2443 } 2444 } 2445 if (do_dynamic && ndyn) { 2446 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2447 width = snprintf(NULL, 0, "%llu", 2448 align_uint64(&d->pcnt)); 2449 if (width > pcwidth) 2450 pcwidth = width; 2451 2452 width = snprintf(NULL, 0, "%llu", 2453 align_uint64(&d->bcnt)); 2454 if (width > bcwidth) 2455 bcwidth = width; 2456 } 2457 } 2458 /* if no rule numbers were specified, list all rules */ 2459 if (ac == 0) { 2460 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2461 show_ipfw(r, pcwidth, bcwidth); 2462 2463 if (do_dynamic && ndyn) { 2464 printf("## Dynamic rules (%d):\n", ndyn); 2465 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2466 show_dyn_ipfw(d, pcwidth, bcwidth); 2467 } 2468 goto done; 2469 } 2470 2471 /* display specific rules requested on command line */ 2472 2473 for (lac = ac, lav = av; lac != 0; lac--) { 2474 /* convert command line rule # */ 2475 last = rnum = strtoul(*lav++, &endptr, 10); 2476 if (*endptr == '-') 2477 last = strtoul(endptr+1, &endptr, 10); 2478 if (*endptr) { 2479 exitval = EX_USAGE; 2480 warnx("invalid rule number: %s", *(lav - 1)); 2481 continue; 2482 } 2483 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2484 if (r->rulenum > last) 2485 break; 2486 if (r->rulenum >= rnum && r->rulenum <= last) { 2487 show_ipfw(r, pcwidth, bcwidth); 2488 seen = 1; 2489 } 2490 } 2491 if (!seen) { 2492 /* give precedence to other error(s) */ 2493 if (exitval == EX_OK) 2494 exitval = EX_UNAVAILABLE; 2495 warnx("rule %lu does not exist", rnum); 2496 } 2497 } 2498 2499 if (do_dynamic && ndyn) { 2500 printf("## Dynamic rules:\n"); 2501 for (lac = ac, lav = av; lac != 0; lac--) { 2502 last = rnum = strtoul(*lav++, &endptr, 10); 2503 if (*endptr == '-') 2504 last = strtoul(endptr+1, &endptr, 10); 2505 if (*endptr) 2506 /* already warned */ 2507 continue; 2508 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2509 uint16_t rulenum; 2510 2511 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2512 if (rulenum > rnum) 2513 break; 2514 if (r->rulenum >= rnum && r->rulenum <= last) 2515 show_dyn_ipfw(d, pcwidth, bcwidth); 2516 } 2517 } 2518 } 2519 2520 ac = 0; 2521 2522 done: 2523 free(data); 2524 2525 if (exitval != EX_OK) 2526 exit(exitval); 2527 #undef NEXT 2528 } 2529 2530 static void 2531 show_usage(void) 2532 { 2533 fprintf(stderr, "usage: ipfw [options]\n" 2534 "do \"ipfw -h\" or see ipfw manpage for details\n" 2535 ); 2536 exit(EX_USAGE); 2537 } 2538 2539 static void 2540 help(void) 2541 { 2542 fprintf(stderr, 2543 "ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2544 "ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2545 "add [num] [set N] [prob x] RULE-BODY\n" 2546 "{pipe|queue} N config PIPE-BODY\n" 2547 "[pipe|queue] {zero|delete|show} [N{,N}]\n" 2548 "set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2549 "table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2550 "\n" 2551 "RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2552 "ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 2553 " skipto N | {divert|tee} PORT | forward ADDR |\n" 2554 " pipe N | queue N\n" 2555 "PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2556 "ADDR: [ MAC dst src ether_type ] \n" 2557 " [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2558 " [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2559 "IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2560 "IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2561 "IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2562 "IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2563 "OPTION_LIST: OPTION [OPTION_LIST]\n" 2564 "OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2565 " {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2566 " {dst-port|src-port} LIST |\n" 2567 " estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2568 " iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2569 " ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2570 " icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n" 2571 " mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2572 " setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2573 " tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2574 ); 2575 exit(0); 2576 } 2577 2578 2579 static int 2580 lookup_host (char *host, struct in_addr *ipaddr) 2581 { 2582 struct hostent *he; 2583 2584 if (!inet_aton(host, ipaddr)) { 2585 if ((he = gethostbyname(host)) == NULL) 2586 return(-1); 2587 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2588 } 2589 return(0); 2590 } 2591 2592 /* 2593 * fills the addr and mask fields in the instruction as appropriate from av. 2594 * Update length as appropriate. 2595 * The following formats are allowed: 2596 * me returns O_IP_*_ME 2597 * 1.2.3.4 single IP address 2598 * 1.2.3.4:5.6.7.8 address:mask 2599 * 1.2.3.4/24 address/mask 2600 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2601 * We can have multiple comma-separated address/mask entries. 2602 */ 2603 static void 2604 fill_ip(ipfw_insn_ip *cmd, char *av) 2605 { 2606 int len = 0; 2607 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2608 2609 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2610 2611 if (_substrcmp(av, "any") == 0) 2612 return; 2613 2614 if (_substrcmp(av, "me") == 0) { 2615 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2616 return; 2617 } 2618 2619 if (strncmp(av, "table(", 6) == 0) { 2620 char *p = strchr(av + 6, ','); 2621 2622 if (p) 2623 *p++ = '\0'; 2624 cmd->o.opcode = O_IP_DST_LOOKUP; 2625 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2626 if (p) { 2627 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2628 d[0] = strtoul(p, NULL, 0); 2629 } else 2630 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2631 return; 2632 } 2633 2634 while (av) { 2635 /* 2636 * After the address we can have '/' or ':' indicating a mask, 2637 * ',' indicating another address follows, '{' indicating a 2638 * set of addresses of unspecified size. 2639 */ 2640 char *p = strpbrk(av, "/:,{"); 2641 int masklen; 2642 char md; 2643 2644 if (p) { 2645 md = *p; 2646 *p++ = '\0'; 2647 } else 2648 md = '\0'; 2649 2650 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2651 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2652 switch (md) { 2653 case ':': 2654 if (!inet_aton(p, (struct in_addr *)&d[1])) 2655 errx(EX_DATAERR, "bad netmask ``%s''", p); 2656 break; 2657 case '/': 2658 masklen = atoi(p); 2659 if (masklen == 0) 2660 d[1] = htonl(0); /* mask */ 2661 else if (masklen > 32) 2662 errx(EX_DATAERR, "bad width ``%s''", p); 2663 else 2664 d[1] = htonl(~0 << (32 - masklen)); 2665 break; 2666 case '{': /* no mask, assume /24 and put back the '{' */ 2667 d[1] = htonl(~0 << (32 - 24)); 2668 *(--p) = md; 2669 break; 2670 2671 case ',': /* single address plus continuation */ 2672 *(--p) = md; 2673 /* FALLTHROUGH */ 2674 case 0: /* initialization value */ 2675 default: 2676 d[1] = htonl(~0); /* force /32 */ 2677 break; 2678 } 2679 d[0] &= d[1]; /* mask base address with mask */ 2680 /* find next separator */ 2681 if (p) 2682 p = strpbrk(p, ",{"); 2683 if (p && *p == '{') { 2684 /* 2685 * We have a set of addresses. They are stored as follows: 2686 * arg1 is the set size (powers of 2, 2..256) 2687 * addr is the base address IN HOST FORMAT 2688 * mask.. is an array of arg1 bits (rounded up to 2689 * the next multiple of 32) with bits set 2690 * for each host in the map. 2691 */ 2692 uint32_t *map = (uint32_t *)&cmd->mask; 2693 int low, high; 2694 int i = contigmask((uint8_t *)&(d[1]), 32); 2695 2696 if (len > 0) 2697 errx(EX_DATAERR, "address set cannot be in a list"); 2698 if (i < 24 || i > 31) 2699 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2700 cmd->o.arg1 = 1<<(32-i); /* map length */ 2701 d[0] = ntohl(d[0]); /* base addr in host format */ 2702 cmd->o.opcode = O_IP_DST_SET; /* default */ 2703 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2704 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2705 map[i] = 0; /* clear map */ 2706 2707 av = p + 1; 2708 low = d[0] & 0xff; 2709 high = low + cmd->o.arg1 - 1; 2710 /* 2711 * Here, i stores the previous value when we specify a range 2712 * of addresses within a mask, e.g. 45-63. i = -1 means we 2713 * have no previous value. 2714 */ 2715 i = -1; /* previous value in a range */ 2716 while (isdigit(*av)) { 2717 char *s; 2718 int a = strtol(av, &s, 0); 2719 2720 if (s == av) { /* no parameter */ 2721 if (*av != '}') 2722 errx(EX_DATAERR, "set not closed\n"); 2723 if (i != -1) 2724 errx(EX_DATAERR, "incomplete range %d-", i); 2725 break; 2726 } 2727 if (a < low || a > high) 2728 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2729 a, low, high); 2730 a -= low; 2731 if (i == -1) /* no previous in range */ 2732 i = a; 2733 else { /* check that range is valid */ 2734 if (i > a) 2735 errx(EX_DATAERR, "invalid range %d-%d", 2736 i+low, a+low); 2737 if (*s == '-') 2738 errx(EX_DATAERR, "double '-' in range"); 2739 } 2740 for (; i <= a; i++) 2741 map[i/32] |= 1<<(i & 31); 2742 i = -1; 2743 if (*s == '-') 2744 i = a; 2745 else if (*s == '}') 2746 break; 2747 av = s+1; 2748 } 2749 return; 2750 } 2751 av = p; 2752 if (av) /* then *av must be a ',' */ 2753 av++; 2754 2755 /* Check this entry */ 2756 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2757 /* 2758 * 'any' turns the entire list into a NOP. 2759 * 'not any' never matches, so it is removed from the 2760 * list unless it is the only item, in which case we 2761 * report an error. 2762 */ 2763 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2764 if (av == NULL && len == 0) /* only this entry */ 2765 errx(EX_DATAERR, "not any never matches"); 2766 } 2767 /* else do nothing and skip this entry */ 2768 return; 2769 } 2770 /* A single IP can be stored in an optimized format */ 2771 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2772 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2773 return; 2774 } 2775 len += 2; /* two words... */ 2776 d += 2; 2777 } /* end while */ 2778 cmd->o.len |= len+1; 2779 } 2780 2781 2782 /* Try to find ipv6 address by hostname */ 2783 static int 2784 lookup_host6 (char *host, struct in6_addr *ip6addr) 2785 { 2786 struct hostent *he; 2787 2788 if (!inet_pton(AF_INET6, host, ip6addr)) { 2789 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2790 return(-1); 2791 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2792 } 2793 return(0); 2794 } 2795 2796 2797 /* n2mask sets n bits of the mask */ 2798 static void 2799 n2mask(struct in6_addr *mask, int n) 2800 { 2801 static int minimask[9] = 2802 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2803 u_char *p; 2804 2805 memset(mask, 0, sizeof(struct in6_addr)); 2806 p = (u_char *) mask; 2807 for (; n > 0; p++, n -= 8) { 2808 if (n >= 8) 2809 *p = 0xff; 2810 else 2811 *p = minimask[n]; 2812 } 2813 return; 2814 } 2815 2816 2817 /* 2818 * fill the addr and mask fields in the instruction as appropriate from av. 2819 * Update length as appropriate. 2820 * The following formats are allowed: 2821 * any matches any IP6. Actually returns an empty instruction. 2822 * me returns O_IP6_*_ME 2823 * 2824 * 03f1::234:123:0342 single IP6 addres 2825 * 03f1::234:123:0342/24 address/mask 2826 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2827 * 2828 * Set of address (as in ipv6) not supported because ipv6 address 2829 * are typically random past the initial prefix. 2830 * Return 1 on success, 0 on failure. 2831 */ 2832 static int 2833 fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2834 { 2835 int len = 0; 2836 struct in6_addr *d = &(cmd->addr6); 2837 /* 2838 * Needed for multiple address. 2839 * Note d[1] points to struct in6_add r mask6 of cmd 2840 */ 2841 2842 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2843 2844 if (strcmp(av, "any") == 0) 2845 return (1); 2846 2847 2848 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2849 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2850 return (1); 2851 } 2852 2853 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2854 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2855 return (1); 2856 } 2857 2858 av = strdup(av); 2859 while (av) { 2860 /* 2861 * After the address we can have '/' indicating a mask, 2862 * or ',' indicating another address follows. 2863 */ 2864 2865 char *p; 2866 int masklen; 2867 char md = '\0'; 2868 2869 if ((p = strpbrk(av, "/,")) ) { 2870 md = *p; /* save the separator */ 2871 *p = '\0'; /* terminate address string */ 2872 p++; /* and skip past it */ 2873 } 2874 /* now p points to NULL, mask or next entry */ 2875 2876 /* lookup stores address in *d as a side effect */ 2877 if (lookup_host6(av, d) != 0) { 2878 /* XXX: failed. Free memory and go */ 2879 errx(EX_DATAERR, "bad address \"%s\"", av); 2880 } 2881 /* next, look at the mask, if any */ 2882 masklen = (md == '/') ? atoi(p) : 128; 2883 if (masklen > 128 || masklen < 0) 2884 errx(EX_DATAERR, "bad width \"%s\''", p); 2885 else 2886 n2mask(&d[1], masklen); 2887 2888 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2889 2890 /* find next separator */ 2891 2892 if (md == '/') { /* find separator past the mask */ 2893 p = strpbrk(p, ","); 2894 if (p != NULL) 2895 p++; 2896 } 2897 av = p; 2898 2899 /* Check this entry */ 2900 if (masklen == 0) { 2901 /* 2902 * 'any' turns the entire list into a NOP. 2903 * 'not any' never matches, so it is removed from the 2904 * list unless it is the only item, in which case we 2905 * report an error. 2906 */ 2907 if (cmd->o.len & F_NOT && av == NULL && len == 0) 2908 errx(EX_DATAERR, "not any never matches"); 2909 continue; 2910 } 2911 2912 /* 2913 * A single IP can be stored alone 2914 */ 2915 if (masklen == 128 && av == NULL && len == 0) { 2916 len = F_INSN_SIZE(struct in6_addr); 2917 break; 2918 } 2919 2920 /* Update length and pointer to arguments */ 2921 len += F_INSN_SIZE(struct in6_addr)*2; 2922 d += 2; 2923 } /* end while */ 2924 2925 /* 2926 * Total length of the command, remember that 1 is the size of 2927 * the base command. 2928 */ 2929 cmd->o.len |= len+1; 2930 free(av); 2931 return (1); 2932 } 2933 2934 /* 2935 * fills command for ipv6 flow-id filtering 2936 * note that the 20 bit flow number is stored in a array of u_int32_t 2937 * it's supported lists of flow-id, so in the o.arg1 we store how many 2938 * additional flow-id we want to filter, the basic is 1 2939 */ 2940 void 2941 fill_flow6( ipfw_insn_u32 *cmd, char *av ) 2942 { 2943 u_int32_t type; /* Current flow number */ 2944 u_int16_t nflow = 0; /* Current flow index */ 2945 char *s = av; 2946 cmd->d[0] = 0; /* Initializing the base number*/ 2947 2948 while (s) { 2949 av = strsep( &s, ",") ; 2950 type = strtoul(av, &av, 0); 2951 if (*av != ',' && *av != '\0') 2952 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2953 if (type > 0xfffff) 2954 errx(EX_DATAERR, "flow number out of range %s", av); 2955 cmd->d[nflow] |= type; 2956 nflow++; 2957 } 2958 if( nflow > 0 ) { 2959 cmd->o.opcode = O_FLOW6ID; 2960 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 2961 cmd->o.arg1 = nflow; 2962 } 2963 else { 2964 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2965 } 2966 } 2967 2968 static ipfw_insn * 2969 add_srcip6(ipfw_insn *cmd, char *av) 2970 { 2971 2972 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2973 if (F_LEN(cmd) == 0) /* any */ 2974 ; 2975 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2976 cmd->opcode = O_IP6_SRC_ME; 2977 } else if (F_LEN(cmd) == 2978 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2979 /* single IP, no mask*/ 2980 cmd->opcode = O_IP6_SRC; 2981 } else { /* addr/mask opt */ 2982 cmd->opcode = O_IP6_SRC_MASK; 2983 } 2984 return cmd; 2985 } 2986 2987 static ipfw_insn * 2988 add_dstip6(ipfw_insn *cmd, char *av) 2989 { 2990 2991 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2992 if (F_LEN(cmd) == 0) /* any */ 2993 ; 2994 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2995 cmd->opcode = O_IP6_DST_ME; 2996 } else if (F_LEN(cmd) == 2997 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2998 /* single IP, no mask*/ 2999 cmd->opcode = O_IP6_DST; 3000 } else { /* addr/mask opt */ 3001 cmd->opcode = O_IP6_DST_MASK; 3002 } 3003 return cmd; 3004 } 3005 3006 3007 /* 3008 * helper function to process a set of flags and set bits in the 3009 * appropriate masks. 3010 */ 3011 static void 3012 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3013 struct _s_x *flags, char *p) 3014 { 3015 uint8_t set=0, clear=0; 3016 3017 while (p && *p) { 3018 char *q; /* points to the separator */ 3019 int val; 3020 uint8_t *which; /* mask we are working on */ 3021 3022 if (*p == '!') { 3023 p++; 3024 which = &clear; 3025 } else 3026 which = &set; 3027 q = strchr(p, ','); 3028 if (q) 3029 *q++ = '\0'; 3030 val = match_token(flags, p); 3031 if (val <= 0) 3032 errx(EX_DATAERR, "invalid flag %s", p); 3033 *which |= (uint8_t)val; 3034 p = q; 3035 } 3036 cmd->opcode = opcode; 3037 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3038 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3039 } 3040 3041 3042 static void 3043 delete(int ac, char *av[]) 3044 { 3045 uint32_t rulenum; 3046 struct dn_pipe p; 3047 int i; 3048 int exitval = EX_OK; 3049 int do_set = 0; 3050 3051 memset(&p, 0, sizeof p); 3052 3053 av++; ac--; 3054 NEED1("missing rule specification"); 3055 if (ac > 0 && _substrcmp(*av, "set") == 0) { 3056 do_set = 1; /* delete set */ 3057 ac--; av++; 3058 } 3059 3060 /* Rule number */ 3061 while (ac && isdigit(**av)) { 3062 i = atoi(*av); av++; ac--; 3063 if (do_pipe) { 3064 if (do_pipe == 1) 3065 p.pipe_nr = i; 3066 else 3067 p.fs.fs_nr = i; 3068 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 3069 if (i) { 3070 exitval = 1; 3071 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 3072 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 3073 } 3074 } else { 3075 rulenum = (i & 0xffff) | (do_set << 24); 3076 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 3077 if (i) { 3078 exitval = EX_UNAVAILABLE; 3079 warn("rule %u: setsockopt(IP_FW_DEL)", 3080 rulenum); 3081 } 3082 } 3083 } 3084 if (exitval != EX_OK) 3085 exit(exitval); 3086 } 3087 3088 3089 /* 3090 * fill the interface structure. We do not check the name as we can 3091 * create interfaces dynamically, so checking them at insert time 3092 * makes relatively little sense. 3093 * Interface names containing '*', '?', or '[' are assumed to be shell 3094 * patterns which match interfaces. 3095 */ 3096 static void 3097 fill_iface(ipfw_insn_if *cmd, char *arg) 3098 { 3099 cmd->name[0] = '\0'; 3100 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3101 3102 /* Parse the interface or address */ 3103 if (strcmp(arg, "any") == 0) 3104 cmd->o.len = 0; /* effectively ignore this command */ 3105 else if (!isdigit(*arg)) { 3106 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3107 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3108 } else if (!inet_aton(arg, &cmd->p.ip)) 3109 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3110 } 3111 3112 static void 3113 config_pipe(int ac, char **av) 3114 { 3115 struct dn_pipe p; 3116 int i; 3117 char *end; 3118 void *par = NULL; 3119 3120 memset(&p, 0, sizeof p); 3121 3122 av++; ac--; 3123 /* Pipe number */ 3124 if (ac && isdigit(**av)) { 3125 i = atoi(*av); av++; ac--; 3126 if (do_pipe == 1) 3127 p.pipe_nr = i; 3128 else 3129 p.fs.fs_nr = i; 3130 } 3131 while (ac > 0) { 3132 double d; 3133 int tok = match_token(dummynet_params, *av); 3134 ac--; av++; 3135 3136 switch(tok) { 3137 case TOK_NOERROR: 3138 p.fs.flags_fs |= DN_NOERROR; 3139 break; 3140 3141 case TOK_PLR: 3142 NEED1("plr needs argument 0..1\n"); 3143 d = strtod(av[0], NULL); 3144 if (d > 1) 3145 d = 1; 3146 else if (d < 0) 3147 d = 0; 3148 p.fs.plr = (int)(d*0x7fffffff); 3149 ac--; av++; 3150 break; 3151 3152 case TOK_QUEUE: 3153 NEED1("queue needs queue size\n"); 3154 end = NULL; 3155 p.fs.qsize = strtoul(av[0], &end, 0); 3156 if (*end == 'K' || *end == 'k') { 3157 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3158 p.fs.qsize *= 1024; 3159 } else if (*end == 'B' || 3160 _substrcmp2(end, "by", "bytes") == 0) { 3161 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3162 } 3163 ac--; av++; 3164 break; 3165 3166 case TOK_BUCKETS: 3167 NEED1("buckets needs argument\n"); 3168 p.fs.rq_size = strtoul(av[0], NULL, 0); 3169 ac--; av++; 3170 break; 3171 3172 case TOK_MASK: 3173 NEED1("mask needs mask specifier\n"); 3174 /* 3175 * per-flow queue, mask is dst_ip, dst_port, 3176 * src_ip, src_port, proto measured in bits 3177 */ 3178 par = NULL; 3179 3180 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 3181 end = NULL; 3182 3183 while (ac >= 1) { 3184 uint32_t *p32 = NULL; 3185 uint16_t *p16 = NULL; 3186 uint32_t *p20 = NULL; 3187 struct in6_addr *pa6 = NULL; 3188 uint32_t a; 3189 3190 tok = match_token(dummynet_params, *av); 3191 ac--; av++; 3192 switch(tok) { 3193 case TOK_ALL: 3194 /* 3195 * special case, all bits significant 3196 */ 3197 p.fs.flow_mask.dst_ip = ~0; 3198 p.fs.flow_mask.src_ip = ~0; 3199 p.fs.flow_mask.dst_port = ~0; 3200 p.fs.flow_mask.src_port = ~0; 3201 p.fs.flow_mask.proto = ~0; 3202 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 3203 n2mask(&(p.fs.flow_mask.src_ip6), 128); 3204 p.fs.flow_mask.flow_id6 = ~0; 3205 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3206 goto end_mask; 3207 3208 case TOK_DSTIP: 3209 p32 = &p.fs.flow_mask.dst_ip; 3210 break; 3211 3212 case TOK_SRCIP: 3213 p32 = &p.fs.flow_mask.src_ip; 3214 break; 3215 3216 case TOK_DSTIP6: 3217 pa6 = &(p.fs.flow_mask.dst_ip6); 3218 break; 3219 3220 case TOK_SRCIP6: 3221 pa6 = &(p.fs.flow_mask.src_ip6); 3222 break; 3223 3224 case TOK_FLOWID: 3225 p20 = &p.fs.flow_mask.flow_id6; 3226 break; 3227 3228 case TOK_DSTPORT: 3229 p16 = &p.fs.flow_mask.dst_port; 3230 break; 3231 3232 case TOK_SRCPORT: 3233 p16 = &p.fs.flow_mask.src_port; 3234 break; 3235 3236 case TOK_PROTO: 3237 break; 3238 3239 default: 3240 ac++; av--; /* backtrack */ 3241 goto end_mask; 3242 } 3243 if (ac < 1) 3244 errx(EX_USAGE, "mask: value missing"); 3245 if (*av[0] == '/') { 3246 a = strtoul(av[0]+1, &end, 0); 3247 if (pa6 == NULL) 3248 a = (a == 32) ? ~0 : (1 << a) - 1; 3249 } else 3250 a = strtoul(av[0], &end, 0); 3251 if (p32 != NULL) 3252 *p32 = a; 3253 else if (p16 != NULL) { 3254 if (a > 0xFFFF) 3255 errx(EX_DATAERR, 3256 "port mask must be 16 bit"); 3257 *p16 = (uint16_t)a; 3258 } else if (p20 != NULL) { 3259 if (a > 0xfffff) 3260 errx(EX_DATAERR, 3261 "flow_id mask must be 20 bit"); 3262 *p20 = (uint32_t)a; 3263 } else if (pa6 != NULL) { 3264 if (a < 0 || a > 128) 3265 errx(EX_DATAERR, 3266 "in6addr invalid mask len"); 3267 else 3268 n2mask(pa6, a); 3269 } else { 3270 if (a > 0xFF) 3271 errx(EX_DATAERR, 3272 "proto mask must be 8 bit"); 3273 p.fs.flow_mask.proto = (uint8_t)a; 3274 } 3275 if (a != 0) 3276 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3277 ac--; av++; 3278 } /* end while, config masks */ 3279 end_mask: 3280 break; 3281 3282 case TOK_RED: 3283 case TOK_GRED: 3284 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 3285 p.fs.flags_fs |= DN_IS_RED; 3286 if (tok == TOK_GRED) 3287 p.fs.flags_fs |= DN_IS_GENTLE_RED; 3288 /* 3289 * the format for parameters is w_q/min_th/max_th/max_p 3290 */ 3291 if ((end = strsep(&av[0], "/"))) { 3292 double w_q = strtod(end, NULL); 3293 if (w_q > 1 || w_q <= 0) 3294 errx(EX_DATAERR, "0 < w_q <= 1"); 3295 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 3296 } 3297 if ((end = strsep(&av[0], "/"))) { 3298 p.fs.min_th = strtoul(end, &end, 0); 3299 if (*end == 'K' || *end == 'k') 3300 p.fs.min_th *= 1024; 3301 } 3302 if ((end = strsep(&av[0], "/"))) { 3303 p.fs.max_th = strtoul(end, &end, 0); 3304 if (*end == 'K' || *end == 'k') 3305 p.fs.max_th *= 1024; 3306 } 3307 if ((end = strsep(&av[0], "/"))) { 3308 double max_p = strtod(end, NULL); 3309 if (max_p > 1 || max_p <= 0) 3310 errx(EX_DATAERR, "0 < max_p <= 1"); 3311 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 3312 } 3313 ac--; av++; 3314 break; 3315 3316 case TOK_DROPTAIL: 3317 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 3318 break; 3319 3320 case TOK_BW: 3321 NEED1("bw needs bandwidth or interface\n"); 3322 if (do_pipe != 1) 3323 errx(EX_DATAERR, "bandwidth only valid for pipes"); 3324 /* 3325 * set clocking interface or bandwidth value 3326 */ 3327 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 3328 int l = sizeof(p.if_name)-1; 3329 /* interface name */ 3330 strncpy(p.if_name, av[0], l); 3331 p.if_name[l] = '\0'; 3332 p.bandwidth = 0; 3333 } else { 3334 p.if_name[0] = '\0'; 3335 p.bandwidth = strtoul(av[0], &end, 0); 3336 if (*end == 'K' || *end == 'k') { 3337 end++; 3338 p.bandwidth *= 1000; 3339 } else if (*end == 'M') { 3340 end++; 3341 p.bandwidth *= 1000000; 3342 } 3343 if (*end == 'B' || 3344 _substrcmp2(end, "by", "bytes") == 0) 3345 p.bandwidth *= 8; 3346 if (p.bandwidth < 0) 3347 errx(EX_DATAERR, "bandwidth too large"); 3348 } 3349 ac--; av++; 3350 break; 3351 3352 case TOK_DELAY: 3353 if (do_pipe != 1) 3354 errx(EX_DATAERR, "delay only valid for pipes"); 3355 NEED1("delay needs argument 0..10000ms\n"); 3356 p.delay = strtoul(av[0], NULL, 0); 3357 ac--; av++; 3358 break; 3359 3360 case TOK_WEIGHT: 3361 if (do_pipe == 1) 3362 errx(EX_DATAERR,"weight only valid for queues"); 3363 NEED1("weight needs argument 0..100\n"); 3364 p.fs.weight = strtoul(av[0], &end, 0); 3365 ac--; av++; 3366 break; 3367 3368 case TOK_PIPE: 3369 if (do_pipe == 1) 3370 errx(EX_DATAERR,"pipe only valid for queues"); 3371 NEED1("pipe needs pipe_number\n"); 3372 p.fs.parent_nr = strtoul(av[0], &end, 0); 3373 ac--; av++; 3374 break; 3375 3376 default: 3377 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3378 } 3379 } 3380 if (do_pipe == 1) { 3381 if (p.pipe_nr == 0) 3382 errx(EX_DATAERR, "pipe_nr must be > 0"); 3383 if (p.delay > 10000) 3384 errx(EX_DATAERR, "delay must be < 10000"); 3385 } else { /* do_pipe == 2, queue */ 3386 if (p.fs.parent_nr == 0) 3387 errx(EX_DATAERR, "pipe must be > 0"); 3388 if (p.fs.weight >100) 3389 errx(EX_DATAERR, "weight must be <= 100"); 3390 } 3391 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 3392 if (p.fs.qsize > 1024*1024) 3393 errx(EX_DATAERR, "queue size must be < 1MB"); 3394 } else { 3395 if (p.fs.qsize > 100) 3396 errx(EX_DATAERR, "2 <= queue size <= 100"); 3397 } 3398 if (p.fs.flags_fs & DN_IS_RED) { 3399 size_t len; 3400 int lookup_depth, avg_pkt_size; 3401 double s, idle, weight, w_q; 3402 struct clockinfo ck; 3403 int t; 3404 3405 if (p.fs.min_th >= p.fs.max_th) 3406 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 3407 p.fs.min_th, p.fs.max_th); 3408 if (p.fs.max_th == 0) 3409 errx(EX_DATAERR, "max_th must be > 0"); 3410 3411 len = sizeof(int); 3412 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 3413 &lookup_depth, &len, NULL, 0) == -1) 3414 3415 errx(1, "sysctlbyname(\"%s\")", 3416 "net.inet.ip.dummynet.red_lookup_depth"); 3417 if (lookup_depth == 0) 3418 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 3419 " must be greater than zero"); 3420 3421 len = sizeof(int); 3422 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 3423 &avg_pkt_size, &len, NULL, 0) == -1) 3424 3425 errx(1, "sysctlbyname(\"%s\")", 3426 "net.inet.ip.dummynet.red_avg_pkt_size"); 3427 if (avg_pkt_size == 0) 3428 errx(EX_DATAERR, 3429 "net.inet.ip.dummynet.red_avg_pkt_size must" 3430 " be greater than zero"); 3431 3432 len = sizeof(struct clockinfo); 3433 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 3434 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 3435 3436 /* 3437 * Ticks needed for sending a medium-sized packet. 3438 * Unfortunately, when we are configuring a WF2Q+ queue, we 3439 * do not have bandwidth information, because that is stored 3440 * in the parent pipe, and also we have multiple queues 3441 * competing for it. So we set s=0, which is not very 3442 * correct. But on the other hand, why do we want RED with 3443 * WF2Q+ ? 3444 */ 3445 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 3446 s = 0; 3447 else 3448 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 3449 3450 /* 3451 * max idle time (in ticks) before avg queue size becomes 0. 3452 * NOTA: (3/w_q) is approx the value x so that 3453 * (1-w_q)^x < 10^-3. 3454 */ 3455 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 3456 idle = s * 3. / w_q; 3457 p.fs.lookup_step = (int)idle / lookup_depth; 3458 if (!p.fs.lookup_step) 3459 p.fs.lookup_step = 1; 3460 weight = 1 - w_q; 3461 for (t = p.fs.lookup_step; t > 0; --t) 3462 weight *= weight; 3463 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 3464 } 3465 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 3466 if (i) 3467 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 3468 } 3469 3470 static void 3471 get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 3472 { 3473 int i, l; 3474 3475 for (i=0; i<6; i++) 3476 addr[i] = mask[i] = 0; 3477 if (strcmp(p, "any") == 0) 3478 return; 3479 3480 for (i=0; *p && i<6;i++, p++) { 3481 addr[i] = strtol(p, &p, 16); 3482 if (*p != ':') /* we start with the mask */ 3483 break; 3484 } 3485 if (*p == '/') { /* mask len */ 3486 l = strtol(p+1, &p, 0); 3487 for (i=0; l>0; l -=8, i++) 3488 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 3489 } else if (*p == '&') { /* mask */ 3490 for (i=0, p++; *p && i<6;i++, p++) { 3491 mask[i] = strtol(p, &p, 16); 3492 if (*p != ':') 3493 break; 3494 } 3495 } else if (*p == '\0') { 3496 for (i=0; i<6; i++) 3497 mask[i] = 0xff; 3498 } 3499 for (i=0; i<6; i++) 3500 addr[i] &= mask[i]; 3501 } 3502 3503 /* 3504 * helper function, updates the pointer to cmd with the length 3505 * of the current command, and also cleans up the first word of 3506 * the new command in case it has been clobbered before. 3507 */ 3508 static ipfw_insn * 3509 next_cmd(ipfw_insn *cmd) 3510 { 3511 cmd += F_LEN(cmd); 3512 bzero(cmd, sizeof(*cmd)); 3513 return cmd; 3514 } 3515 3516 /* 3517 * Takes arguments and copies them into a comment 3518 */ 3519 static void 3520 fill_comment(ipfw_insn *cmd, int ac, char **av) 3521 { 3522 int i, l; 3523 char *p = (char *)(cmd + 1); 3524 3525 cmd->opcode = O_NOP; 3526 cmd->len = (cmd->len & (F_NOT | F_OR)); 3527 3528 /* Compute length of comment string. */ 3529 for (i = 0, l = 0; i < ac; i++) 3530 l += strlen(av[i]) + 1; 3531 if (l == 0) 3532 return; 3533 if (l > 84) 3534 errx(EX_DATAERR, 3535 "comment too long (max 80 chars)"); 3536 l = 1 + (l+3)/4; 3537 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3538 for (i = 0; i < ac; i++) { 3539 strcpy(p, av[i]); 3540 p += strlen(av[i]); 3541 *p++ = ' '; 3542 } 3543 *(--p) = '\0'; 3544 } 3545 3546 /* 3547 * A function to fill simple commands of size 1. 3548 * Existing flags are preserved. 3549 */ 3550 static void 3551 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3552 { 3553 cmd->opcode = opcode; 3554 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3555 cmd->arg1 = arg; 3556 } 3557 3558 /* 3559 * Fetch and add the MAC address and type, with masks. This generates one or 3560 * two microinstructions, and returns the pointer to the last one. 3561 */ 3562 static ipfw_insn * 3563 add_mac(ipfw_insn *cmd, int ac, char *av[]) 3564 { 3565 ipfw_insn_mac *mac; 3566 3567 if (ac < 2) 3568 errx(EX_DATAERR, "MAC dst src"); 3569 3570 cmd->opcode = O_MACADDR2; 3571 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3572 3573 mac = (ipfw_insn_mac *)cmd; 3574 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3575 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 3576 return cmd; 3577 } 3578 3579 static ipfw_insn * 3580 add_mactype(ipfw_insn *cmd, int ac, char *av) 3581 { 3582 if (ac < 1) 3583 errx(EX_DATAERR, "missing MAC type"); 3584 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3585 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 3586 cmd->opcode = O_MAC_TYPE; 3587 return cmd; 3588 } else 3589 return NULL; 3590 } 3591 3592 static ipfw_insn * 3593 add_proto(ipfw_insn *cmd, char *av, u_char *proto) 3594 { 3595 struct protoent *pe; 3596 3597 *proto = IPPROTO_IP; 3598 3599 if (_substrcmp(av, "all") == 0) 3600 ; /* do not set O_IP4 nor O_IP6 */ 3601 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3602 /* explicit "just IPv4" rule */ 3603 fill_cmd(cmd, O_IP4, 0, 0); 3604 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3605 /* explicit "just IPv6" rule */ 3606 *proto = IPPROTO_IPV6; 3607 fill_cmd(cmd, O_IP6, 0, 0); 3608 } else if ((*proto = atoi(av)) > 0) 3609 ; /* all done! */ 3610 else if ((pe = getprotobyname(av)) != NULL) 3611 *proto = pe->p_proto; 3612 else 3613 return NULL; 3614 if (*proto != IPPROTO_IP && *proto != IPPROTO_IPV6) 3615 fill_cmd(cmd, O_PROTO, 0, *proto); 3616 3617 return cmd; 3618 } 3619 3620 static ipfw_insn * 3621 add_srcip(ipfw_insn *cmd, char *av) 3622 { 3623 fill_ip((ipfw_insn_ip *)cmd, av); 3624 if (cmd->opcode == O_IP_DST_SET) /* set */ 3625 cmd->opcode = O_IP_SRC_SET; 3626 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3627 cmd->opcode = O_IP_SRC_LOOKUP; 3628 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3629 cmd->opcode = O_IP_SRC_ME; 3630 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3631 cmd->opcode = O_IP_SRC; 3632 else /* addr/mask */ 3633 cmd->opcode = O_IP_SRC_MASK; 3634 return cmd; 3635 } 3636 3637 static ipfw_insn * 3638 add_dstip(ipfw_insn *cmd, char *av) 3639 { 3640 fill_ip((ipfw_insn_ip *)cmd, av); 3641 if (cmd->opcode == O_IP_DST_SET) /* set */ 3642 ; 3643 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3644 ; 3645 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3646 cmd->opcode = O_IP_DST_ME; 3647 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3648 cmd->opcode = O_IP_DST; 3649 else /* addr/mask */ 3650 cmd->opcode = O_IP_DST_MASK; 3651 return cmd; 3652 } 3653 3654 static ipfw_insn * 3655 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 3656 { 3657 if (_substrcmp(av, "any") == 0) { 3658 return NULL; 3659 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 3660 /* XXX todo: check that we have a protocol with ports */ 3661 cmd->opcode = opcode; 3662 return cmd; 3663 } 3664 return NULL; 3665 } 3666 3667 static ipfw_insn * 3668 add_src(ipfw_insn *cmd, char *av, u_char proto) 3669 { 3670 struct in6_addr a; 3671 3672 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3673 inet_pton(AF_INET6, av, &a)) 3674 return add_srcip6(cmd, av); 3675 /* XXX: should check for IPv4, not !IPv6 */ 3676 if (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3677 !inet_pton(AF_INET6, av, &a)) 3678 return add_srcip(cmd, av); 3679 if (strcmp(av, "any") != 0) 3680 return cmd; 3681 3682 return NULL; 3683 } 3684 3685 static ipfw_insn * 3686 add_dst(ipfw_insn *cmd, char *av, u_char proto) 3687 { 3688 struct in6_addr a; 3689 3690 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3691 inet_pton(AF_INET6, av, &a)) 3692 return add_dstip6(cmd, av); 3693 /* XXX: should check for IPv4, not !IPv6 */ 3694 if (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3695 !inet_pton(AF_INET6, av, &a)) 3696 return add_dstip(cmd, av); 3697 if (strcmp(av, "any") != 0) 3698 return cmd; 3699 3700 return NULL; 3701 } 3702 3703 /* 3704 * Parse arguments and assemble the microinstructions which make up a rule. 3705 * Rules are added into the 'rulebuf' and then copied in the correct order 3706 * into the actual rule. 3707 * 3708 * The syntax for a rule starts with the action, followed by 3709 * optional action parameters, and the various match patterns. 3710 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3711 * (generated if the rule includes a keep-state option), then the 3712 * various match patterns, log/altq actions, and the actual action. 3713 * 3714 */ 3715 static void 3716 add(int ac, char *av[]) 3717 { 3718 /* 3719 * rules are added into the 'rulebuf' and then copied in 3720 * the correct order into the actual rule. 3721 * Some things that need to go out of order (prob, action etc.) 3722 * go into actbuf[]. 3723 */ 3724 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3725 3726 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3727 ipfw_insn *first_cmd; /* first match pattern */ 3728 3729 struct ip_fw *rule; 3730 3731 /* 3732 * various flags used to record that we entered some fields. 3733 */ 3734 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3735 ipfw_insn *have_log = NULL, *have_altq = NULL; 3736 size_t len; 3737 3738 int i; 3739 3740 int open_par = 0; /* open parenthesis ( */ 3741 3742 /* proto is here because it is used to fetch ports */ 3743 u_char proto = IPPROTO_IP; /* default protocol */ 3744 3745 double match_prob = 1; /* match probability, default is always match */ 3746 3747 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3748 bzero(cmdbuf, sizeof(cmdbuf)); 3749 bzero(rulebuf, sizeof(rulebuf)); 3750 3751 rule = (struct ip_fw *)rulebuf; 3752 cmd = (ipfw_insn *)cmdbuf; 3753 action = (ipfw_insn *)actbuf; 3754 3755 av++; ac--; 3756 3757 /* [rule N] -- Rule number optional */ 3758 if (ac && isdigit(**av)) { 3759 rule->rulenum = atoi(*av); 3760 av++; 3761 ac--; 3762 } 3763 3764 /* [set N] -- set number (0..RESVD_SET), optional */ 3765 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3766 int set = strtoul(av[1], NULL, 10); 3767 if (set < 0 || set > RESVD_SET) 3768 errx(EX_DATAERR, "illegal set %s", av[1]); 3769 rule->set = set; 3770 av += 2; ac -= 2; 3771 } 3772 3773 /* [prob D] -- match probability, optional */ 3774 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3775 match_prob = strtod(av[1], NULL); 3776 3777 if (match_prob <= 0 || match_prob > 1) 3778 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3779 av += 2; ac -= 2; 3780 } 3781 3782 /* action -- mandatory */ 3783 NEED1("missing action"); 3784 i = match_token(rule_actions, *av); 3785 ac--; av++; 3786 action->len = 1; /* default */ 3787 switch(i) { 3788 case TOK_CHECKSTATE: 3789 have_state = action; 3790 action->opcode = O_CHECK_STATE; 3791 break; 3792 3793 case TOK_ACCEPT: 3794 action->opcode = O_ACCEPT; 3795 break; 3796 3797 case TOK_DENY: 3798 action->opcode = O_DENY; 3799 action->arg1 = 0; 3800 break; 3801 3802 case TOK_REJECT: 3803 action->opcode = O_REJECT; 3804 action->arg1 = ICMP_UNREACH_HOST; 3805 break; 3806 3807 case TOK_RESET: 3808 action->opcode = O_REJECT; 3809 action->arg1 = ICMP_REJECT_RST; 3810 break; 3811 3812 case TOK_RESET6: 3813 action->opcode = O_UNREACH6; 3814 action->arg1 = ICMP6_UNREACH_RST; 3815 break; 3816 3817 case TOK_UNREACH: 3818 action->opcode = O_REJECT; 3819 NEED1("missing reject code"); 3820 fill_reject_code(&action->arg1, *av); 3821 ac--; av++; 3822 break; 3823 3824 case TOK_UNREACH6: 3825 action->opcode = O_UNREACH6; 3826 NEED1("missing unreach code"); 3827 fill_unreach6_code(&action->arg1, *av); 3828 ac--; av++; 3829 break; 3830 3831 case TOK_COUNT: 3832 action->opcode = O_COUNT; 3833 break; 3834 3835 case TOK_QUEUE: 3836 case TOK_PIPE: 3837 action->len = F_INSN_SIZE(ipfw_insn_pipe); 3838 case TOK_SKIPTO: 3839 if (i == TOK_QUEUE) 3840 action->opcode = O_QUEUE; 3841 else if (i == TOK_PIPE) 3842 action->opcode = O_PIPE; 3843 else if (i == TOK_SKIPTO) 3844 action->opcode = O_SKIPTO; 3845 NEED1("missing skipto/pipe/queue number"); 3846 action->arg1 = strtoul(*av, NULL, 10); 3847 av++; ac--; 3848 break; 3849 3850 case TOK_DIVERT: 3851 case TOK_TEE: 3852 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 3853 NEED1("missing divert/tee port"); 3854 action->arg1 = strtoul(*av, NULL, 0); 3855 if (action->arg1 == 0) { 3856 struct servent *s; 3857 setservent(1); 3858 s = getservbyname(av[0], "divert"); 3859 if (s != NULL) 3860 action->arg1 = ntohs(s->s_port); 3861 else 3862 errx(EX_DATAERR, "illegal divert/tee port"); 3863 } 3864 ac--; av++; 3865 break; 3866 3867 case TOK_NETGRAPH: 3868 case TOK_NGTEE: 3869 action->opcode = (i == TOK_NETGRAPH ) ? O_NETGRAPH : O_NGTEE; 3870 NEED1("missing netgraph cookie"); 3871 action->arg1 = strtoul(*av, NULL, 0); 3872 if (action->arg1 == 0) 3873 errx(EX_DATAERR, "illegal netgraph cookie"); 3874 ac--; av++; 3875 break; 3876 3877 case TOK_FORWARD: { 3878 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3879 char *s, *end; 3880 3881 NEED1("missing forward address[:port]"); 3882 3883 action->opcode = O_FORWARD_IP; 3884 action->len = F_INSN_SIZE(ipfw_insn_sa); 3885 3886 p->sa.sin_len = sizeof(struct sockaddr_in); 3887 p->sa.sin_family = AF_INET; 3888 p->sa.sin_port = 0; 3889 /* 3890 * locate the address-port separator (':' or ',') 3891 */ 3892 s = strchr(*av, ':'); 3893 if (s == NULL) 3894 s = strchr(*av, ','); 3895 if (s != NULL) { 3896 *(s++) = '\0'; 3897 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3898 if (s == end) 3899 errx(EX_DATAERR, 3900 "illegal forwarding port ``%s''", s); 3901 p->sa.sin_port = (u_short)i; 3902 } 3903 lookup_host(*av, &(p->sa.sin_addr)); 3904 } 3905 ac--; av++; 3906 break; 3907 3908 case TOK_COMMENT: 3909 /* pretend it is a 'count' rule followed by the comment */ 3910 action->opcode = O_COUNT; 3911 ac++; av--; /* go back... */ 3912 break; 3913 3914 default: 3915 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 3916 } 3917 action = next_cmd(action); 3918 3919 /* 3920 * [altq queuename] -- altq tag, optional 3921 * [log [logamount N]] -- log, optional 3922 * 3923 * If they exist, it go first in the cmdbuf, but then it is 3924 * skipped in the copy section to the end of the buffer. 3925 */ 3926 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 3927 ac--; av++; 3928 switch (i) { 3929 case TOK_LOG: 3930 { 3931 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 3932 int l; 3933 3934 if (have_log) 3935 errx(EX_DATAERR, 3936 "log cannot be specified more than once"); 3937 have_log = (ipfw_insn *)c; 3938 cmd->len = F_INSN_SIZE(ipfw_insn_log); 3939 cmd->opcode = O_LOG; 3940 if (ac && _substrcmp(*av, "logamount") == 0) { 3941 ac--; av++; 3942 NEED1("logamount requires argument"); 3943 l = atoi(*av); 3944 if (l < 0) 3945 errx(EX_DATAERR, 3946 "logamount must be positive"); 3947 c->max_log = l; 3948 ac--; av++; 3949 } else { 3950 len = sizeof(c->max_log); 3951 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 3952 &c->max_log, &len, NULL, 0) == -1) 3953 errx(1, "sysctlbyname(\"%s\")", 3954 "net.inet.ip.fw.verbose_limit"); 3955 } 3956 } 3957 break; 3958 3959 case TOK_ALTQ: 3960 { 3961 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 3962 3963 NEED1("missing altq queue name"); 3964 if (have_altq) 3965 errx(EX_DATAERR, 3966 "altq cannot be specified more than once"); 3967 have_altq = (ipfw_insn *)a; 3968 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 3969 cmd->opcode = O_ALTQ; 3970 fill_altq_qid(&a->qid, *av); 3971 ac--; av++; 3972 } 3973 break; 3974 3975 default: 3976 abort(); 3977 } 3978 cmd = next_cmd(cmd); 3979 } 3980 3981 if (have_state) /* must be a check-state, we are done */ 3982 goto done; 3983 3984 #define OR_START(target) \ 3985 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 3986 if (open_par) \ 3987 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 3988 prev = NULL; \ 3989 open_par = 1; \ 3990 if ( (av[0])[1] == '\0') { \ 3991 ac--; av++; \ 3992 } else \ 3993 (*av)++; \ 3994 } \ 3995 target: \ 3996 3997 3998 #define CLOSE_PAR \ 3999 if (open_par) { \ 4000 if (ac && ( \ 4001 strcmp(*av, ")") == 0 || \ 4002 strcmp(*av, "}") == 0)) { \ 4003 prev = NULL; \ 4004 open_par = 0; \ 4005 ac--; av++; \ 4006 } else \ 4007 errx(EX_USAGE, "missing \")\"\n"); \ 4008 } 4009 4010 #define NOT_BLOCK \ 4011 if (ac && _substrcmp(*av, "not") == 0) { \ 4012 if (cmd->len & F_NOT) \ 4013 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4014 cmd->len |= F_NOT; \ 4015 ac--; av++; \ 4016 } 4017 4018 #define OR_BLOCK(target) \ 4019 if (ac && _substrcmp(*av, "or") == 0) { \ 4020 if (prev == NULL || open_par == 0) \ 4021 errx(EX_DATAERR, "invalid OR block"); \ 4022 prev->len |= F_OR; \ 4023 ac--; av++; \ 4024 goto target; \ 4025 } \ 4026 CLOSE_PAR; 4027 4028 first_cmd = cmd; 4029 4030 #if 0 4031 /* 4032 * MAC addresses, optional. 4033 * If we have this, we skip the part "proto from src to dst" 4034 * and jump straight to the option parsing. 4035 */ 4036 NOT_BLOCK; 4037 NEED1("missing protocol"); 4038 if (_substrcmp(*av, "MAC") == 0 || 4039 _substrcmp(*av, "mac") == 0) { 4040 ac--; av++; /* the "MAC" keyword */ 4041 add_mac(cmd, ac, av); /* exits in case of errors */ 4042 cmd = next_cmd(cmd); 4043 ac -= 2; av += 2; /* dst-mac and src-mac */ 4044 NOT_BLOCK; 4045 NEED1("missing mac type"); 4046 if (add_mactype(cmd, ac, av[0])) 4047 cmd = next_cmd(cmd); 4048 ac--; av++; /* any or mac-type */ 4049 goto read_options; 4050 } 4051 #endif 4052 4053 /* 4054 * protocol, mandatory 4055 */ 4056 OR_START(get_proto); 4057 NOT_BLOCK; 4058 NEED1("missing protocol"); 4059 if (add_proto(cmd, *av, &proto)) { 4060 av++; ac--; 4061 if (F_LEN(cmd) != 0) { 4062 prev = cmd; 4063 cmd = next_cmd(cmd); 4064 } 4065 } else if (first_cmd != cmd) { 4066 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4067 } else 4068 goto read_options; 4069 OR_BLOCK(get_proto); 4070 4071 /* 4072 * "from", mandatory 4073 */ 4074 if (!ac || _substrcmp(*av, "from") != 0) 4075 errx(EX_USAGE, "missing ``from''"); 4076 ac--; av++; 4077 4078 /* 4079 * source IP, mandatory 4080 */ 4081 OR_START(source_ip); 4082 NOT_BLOCK; /* optional "not" */ 4083 NEED1("missing source address"); 4084 if (add_src(cmd, *av, proto)) { 4085 ac--; av++; 4086 if (F_LEN(cmd) != 0) { /* ! any */ 4087 prev = cmd; 4088 cmd = next_cmd(cmd); 4089 } 4090 } else 4091 errx(EX_USAGE, "bad source address %s", *av); 4092 OR_BLOCK(source_ip); 4093 4094 /* 4095 * source ports, optional 4096 */ 4097 NOT_BLOCK; /* optional "not" */ 4098 if (ac) { 4099 if (_substrcmp(*av, "any") == 0 || 4100 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4101 ac--; av++; 4102 if (F_LEN(cmd) != 0) 4103 cmd = next_cmd(cmd); 4104 } 4105 } 4106 4107 /* 4108 * "to", mandatory 4109 */ 4110 if (!ac || _substrcmp(*av, "to") != 0) 4111 errx(EX_USAGE, "missing ``to''"); 4112 av++; ac--; 4113 4114 /* 4115 * destination, mandatory 4116 */ 4117 OR_START(dest_ip); 4118 NOT_BLOCK; /* optional "not" */ 4119 NEED1("missing dst address"); 4120 if (add_dst(cmd, *av, proto)) { 4121 ac--; av++; 4122 if (F_LEN(cmd) != 0) { /* ! any */ 4123 prev = cmd; 4124 cmd = next_cmd(cmd); 4125 } 4126 } else 4127 errx( EX_USAGE, "bad destination address %s", *av); 4128 OR_BLOCK(dest_ip); 4129 4130 /* 4131 * dest. ports, optional 4132 */ 4133 NOT_BLOCK; /* optional "not" */ 4134 if (ac) { 4135 if (_substrcmp(*av, "any") == 0 || 4136 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4137 ac--; av++; 4138 if (F_LEN(cmd) != 0) 4139 cmd = next_cmd(cmd); 4140 } 4141 } 4142 4143 read_options: 4144 if (ac && first_cmd == cmd) { 4145 /* 4146 * nothing specified so far, store in the rule to ease 4147 * printout later. 4148 */ 4149 rule->_pad = 1; 4150 } 4151 prev = NULL; 4152 while (ac) { 4153 char *s; 4154 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4155 4156 s = *av; 4157 cmd32 = (ipfw_insn_u32 *)cmd; 4158 4159 if (*s == '!') { /* alternate syntax for NOT */ 4160 if (cmd->len & F_NOT) 4161 errx(EX_USAGE, "double \"not\" not allowed\n"); 4162 cmd->len = F_NOT; 4163 s++; 4164 } 4165 i = match_token(rule_options, s); 4166 ac--; av++; 4167 switch(i) { 4168 case TOK_NOT: 4169 if (cmd->len & F_NOT) 4170 errx(EX_USAGE, "double \"not\" not allowed\n"); 4171 cmd->len = F_NOT; 4172 break; 4173 4174 case TOK_OR: 4175 if (open_par == 0 || prev == NULL) 4176 errx(EX_USAGE, "invalid \"or\" block\n"); 4177 prev->len |= F_OR; 4178 break; 4179 4180 case TOK_STARTBRACE: 4181 if (open_par) 4182 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4183 open_par = 1; 4184 break; 4185 4186 case TOK_ENDBRACE: 4187 if (!open_par) 4188 errx(EX_USAGE, "+missing \")\"\n"); 4189 open_par = 0; 4190 prev = NULL; 4191 break; 4192 4193 case TOK_IN: 4194 fill_cmd(cmd, O_IN, 0, 0); 4195 break; 4196 4197 case TOK_OUT: 4198 cmd->len ^= F_NOT; /* toggle F_NOT */ 4199 fill_cmd(cmd, O_IN, 0, 0); 4200 break; 4201 4202 case TOK_DIVERTED: 4203 fill_cmd(cmd, O_DIVERTED, 0, 3); 4204 break; 4205 4206 case TOK_DIVERTEDLOOPBACK: 4207 fill_cmd(cmd, O_DIVERTED, 0, 1); 4208 break; 4209 4210 case TOK_DIVERTEDOUTPUT: 4211 fill_cmd(cmd, O_DIVERTED, 0, 2); 4212 break; 4213 4214 case TOK_FRAG: 4215 fill_cmd(cmd, O_FRAG, 0, 0); 4216 break; 4217 4218 case TOK_LAYER2: 4219 fill_cmd(cmd, O_LAYER2, 0, 0); 4220 break; 4221 4222 case TOK_XMIT: 4223 case TOK_RECV: 4224 case TOK_VIA: 4225 NEED1("recv, xmit, via require interface name" 4226 " or address"); 4227 fill_iface((ipfw_insn_if *)cmd, av[0]); 4228 ac--; av++; 4229 if (F_LEN(cmd) == 0) /* not a valid address */ 4230 break; 4231 if (i == TOK_XMIT) 4232 cmd->opcode = O_XMIT; 4233 else if (i == TOK_RECV) 4234 cmd->opcode = O_RECV; 4235 else if (i == TOK_VIA) 4236 cmd->opcode = O_VIA; 4237 break; 4238 4239 case TOK_ICMPTYPES: 4240 NEED1("icmptypes requires list of types"); 4241 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4242 av++; ac--; 4243 break; 4244 4245 case TOK_ICMP6TYPES: 4246 NEED1("icmptypes requires list of types"); 4247 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 4248 av++; ac--; 4249 break; 4250 4251 case TOK_IPTTL: 4252 NEED1("ipttl requires TTL"); 4253 if (strpbrk(*av, "-,")) { 4254 if (!add_ports(cmd, *av, 0, O_IPTTL)) 4255 errx(EX_DATAERR, "invalid ipttl %s", *av); 4256 } else 4257 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4258 ac--; av++; 4259 break; 4260 4261 case TOK_IPID: 4262 NEED1("ipid requires id"); 4263 if (strpbrk(*av, "-,")) { 4264 if (!add_ports(cmd, *av, 0, O_IPID)) 4265 errx(EX_DATAERR, "invalid ipid %s", *av); 4266 } else 4267 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4268 ac--; av++; 4269 break; 4270 4271 case TOK_IPLEN: 4272 NEED1("iplen requires length"); 4273 if (strpbrk(*av, "-,")) { 4274 if (!add_ports(cmd, *av, 0, O_IPLEN)) 4275 errx(EX_DATAERR, "invalid ip len %s", *av); 4276 } else 4277 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4278 ac--; av++; 4279 break; 4280 4281 case TOK_IPVER: 4282 NEED1("ipver requires version"); 4283 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4284 ac--; av++; 4285 break; 4286 4287 case TOK_IPPRECEDENCE: 4288 NEED1("ipprecedence requires value"); 4289 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4290 (strtoul(*av, NULL, 0) & 7) << 5); 4291 ac--; av++; 4292 break; 4293 4294 case TOK_IPOPTS: 4295 NEED1("missing argument for ipoptions"); 4296 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 4297 ac--; av++; 4298 break; 4299 4300 case TOK_IPTOS: 4301 NEED1("missing argument for iptos"); 4302 fill_flags(cmd, O_IPTOS, f_iptos, *av); 4303 ac--; av++; 4304 break; 4305 4306 case TOK_UID: 4307 NEED1("uid requires argument"); 4308 { 4309 char *end; 4310 uid_t uid; 4311 struct passwd *pwd; 4312 4313 cmd->opcode = O_UID; 4314 uid = strtoul(*av, &end, 0); 4315 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4316 if (pwd == NULL) 4317 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4318 cmd32->d[0] = pwd->pw_uid; 4319 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4320 ac--; av++; 4321 } 4322 break; 4323 4324 case TOK_GID: 4325 NEED1("gid requires argument"); 4326 { 4327 char *end; 4328 gid_t gid; 4329 struct group *grp; 4330 4331 cmd->opcode = O_GID; 4332 gid = strtoul(*av, &end, 0); 4333 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4334 if (grp == NULL) 4335 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4336 cmd32->d[0] = grp->gr_gid; 4337 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4338 ac--; av++; 4339 } 4340 break; 4341 4342 case TOK_JAIL: 4343 NEED1("jail requires argument"); 4344 { 4345 char *end; 4346 int jid; 4347 4348 cmd->opcode = O_JAIL; 4349 jid = (int)strtol(*av, &end, 0); 4350 if (jid < 0 || *end != '\0') 4351 errx(EX_DATAERR, "jail requires prison ID"); 4352 cmd32->d[0] = (uint32_t)jid; 4353 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4354 ac--; av++; 4355 } 4356 break; 4357 4358 case TOK_ESTAB: 4359 fill_cmd(cmd, O_ESTAB, 0, 0); 4360 break; 4361 4362 case TOK_SETUP: 4363 fill_cmd(cmd, O_TCPFLAGS, 0, 4364 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4365 break; 4366 4367 case TOK_TCPDATALEN: 4368 NEED1("tcpdatalen requires length"); 4369 if (strpbrk(*av, "-,")) { 4370 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 4371 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4372 } else 4373 fill_cmd(cmd, O_TCPDATALEN, 0, 4374 strtoul(*av, NULL, 0)); 4375 ac--; av++; 4376 break; 4377 4378 case TOK_TCPOPTS: 4379 NEED1("missing argument for tcpoptions"); 4380 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 4381 ac--; av++; 4382 break; 4383 4384 case TOK_TCPSEQ: 4385 case TOK_TCPACK: 4386 NEED1("tcpseq/tcpack requires argument"); 4387 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4388 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4389 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4390 ac--; av++; 4391 break; 4392 4393 case TOK_TCPWIN: 4394 NEED1("tcpwin requires length"); 4395 fill_cmd(cmd, O_TCPWIN, 0, 4396 htons(strtoul(*av, NULL, 0))); 4397 ac--; av++; 4398 break; 4399 4400 case TOK_TCPFLAGS: 4401 NEED1("missing argument for tcpflags"); 4402 cmd->opcode = O_TCPFLAGS; 4403 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 4404 ac--; av++; 4405 break; 4406 4407 case TOK_KEEPSTATE: 4408 if (open_par) 4409 errx(EX_USAGE, "keep-state cannot be part " 4410 "of an or block"); 4411 if (have_state) 4412 errx(EX_USAGE, "only one of keep-state " 4413 "and limit is allowed"); 4414 have_state = cmd; 4415 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4416 break; 4417 4418 case TOK_LIMIT: 4419 if (open_par) 4420 errx(EX_USAGE, "limit cannot be part " 4421 "of an or block"); 4422 if (have_state) 4423 errx(EX_USAGE, "only one of keep-state " 4424 "and limit is allowed"); 4425 NEED1("limit needs mask and # of connections"); 4426 have_state = cmd; 4427 { 4428 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4429 4430 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4431 cmd->opcode = O_LIMIT; 4432 c->limit_mask = 0; 4433 c->conn_limit = 0; 4434 for (; ac >1 ;) { 4435 int val; 4436 4437 val = match_token(limit_masks, *av); 4438 if (val <= 0) 4439 break; 4440 c->limit_mask |= val; 4441 ac--; av++; 4442 } 4443 c->conn_limit = atoi(*av); 4444 if (c->conn_limit == 0) 4445 errx(EX_USAGE, "limit: limit must be >0"); 4446 if (c->limit_mask == 0) 4447 errx(EX_USAGE, "missing limit mask"); 4448 ac--; av++; 4449 } 4450 break; 4451 4452 case TOK_PROTO: 4453 NEED1("missing protocol"); 4454 if (add_proto(cmd, *av, &proto)) { 4455 ac--; av++; 4456 } else 4457 errx(EX_DATAERR, "invalid protocol ``%s''", 4458 *av); 4459 break; 4460 4461 case TOK_SRCIP: 4462 NEED1("missing source IP"); 4463 if (add_srcip(cmd, *av)) { 4464 ac--; av++; 4465 } 4466 break; 4467 4468 case TOK_DSTIP: 4469 NEED1("missing destination IP"); 4470 if (add_dstip(cmd, *av)) { 4471 ac--; av++; 4472 } 4473 break; 4474 4475 case TOK_SRCIP6: 4476 NEED1("missing source IP6"); 4477 if (add_srcip6(cmd, *av)) { 4478 ac--; av++; 4479 } 4480 break; 4481 4482 case TOK_DSTIP6: 4483 NEED1("missing destination IP6"); 4484 if (add_dstip6(cmd, *av)) { 4485 ac--; av++; 4486 } 4487 break; 4488 4489 case TOK_SRCPORT: 4490 NEED1("missing source port"); 4491 if (_substrcmp(*av, "any") == 0 || 4492 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4493 ac--; av++; 4494 } else 4495 errx(EX_DATAERR, "invalid source port %s", *av); 4496 break; 4497 4498 case TOK_DSTPORT: 4499 NEED1("missing destination port"); 4500 if (_substrcmp(*av, "any") == 0 || 4501 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4502 ac--; av++; 4503 } else 4504 errx(EX_DATAERR, "invalid destination port %s", 4505 *av); 4506 break; 4507 4508 case TOK_MAC: 4509 if (add_mac(cmd, ac, av)) { 4510 ac -= 2; av += 2; 4511 } 4512 break; 4513 4514 case TOK_MACTYPE: 4515 NEED1("missing mac type"); 4516 if (!add_mactype(cmd, ac, *av)) 4517 errx(EX_DATAERR, "invalid mac type %s", *av); 4518 ac--; av++; 4519 break; 4520 4521 case TOK_VERREVPATH: 4522 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4523 break; 4524 4525 case TOK_VERSRCREACH: 4526 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4527 break; 4528 4529 case TOK_ANTISPOOF: 4530 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4531 break; 4532 4533 case TOK_IPSEC: 4534 fill_cmd(cmd, O_IPSEC, 0, 0); 4535 break; 4536 4537 case TOK_IPV6: 4538 fill_cmd(cmd, O_IP6, 0, 0); 4539 break; 4540 4541 case TOK_IPV4: 4542 fill_cmd(cmd, O_IP4, 0, 0); 4543 break; 4544 4545 case TOK_EXT6HDR: 4546 fill_ext6hdr( cmd, *av ); 4547 ac--; av++; 4548 break; 4549 4550 case TOK_FLOWID: 4551 if (proto != IPPROTO_IPV6 ) 4552 errx( EX_USAGE, "flow-id filter is active " 4553 "only for ipv6 protocol\n"); 4554 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 4555 ac--; av++; 4556 break; 4557 4558 case TOK_COMMENT: 4559 fill_comment(cmd, ac, av); 4560 av += ac; 4561 ac = 0; 4562 break; 4563 4564 default: 4565 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4566 } 4567 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4568 prev = cmd; 4569 cmd = next_cmd(cmd); 4570 } 4571 } 4572 4573 done: 4574 /* 4575 * Now copy stuff into the rule. 4576 * If we have a keep-state option, the first instruction 4577 * must be a PROBE_STATE (which is generated here). 4578 * If we have a LOG option, it was stored as the first command, 4579 * and now must be moved to the top of the action part. 4580 */ 4581 dst = (ipfw_insn *)rule->cmd; 4582 4583 /* 4584 * First thing to write into the command stream is the match probability. 4585 */ 4586 if (match_prob != 1) { /* 1 means always match */ 4587 dst->opcode = O_PROB; 4588 dst->len = 2; 4589 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4590 dst += dst->len; 4591 } 4592 4593 /* 4594 * generate O_PROBE_STATE if necessary 4595 */ 4596 if (have_state && have_state->opcode != O_CHECK_STATE) { 4597 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4598 dst = next_cmd(dst); 4599 } 4600 /* 4601 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ 4602 */ 4603 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4604 i = F_LEN(src); 4605 4606 switch (src->opcode) { 4607 case O_LOG: 4608 case O_KEEP_STATE: 4609 case O_LIMIT: 4610 case O_ALTQ: 4611 break; 4612 default: 4613 bcopy(src, dst, i * sizeof(uint32_t)); 4614 dst += i; 4615 } 4616 } 4617 4618 /* 4619 * put back the have_state command as last opcode 4620 */ 4621 if (have_state && have_state->opcode != O_CHECK_STATE) { 4622 i = F_LEN(have_state); 4623 bcopy(have_state, dst, i * sizeof(uint32_t)); 4624 dst += i; 4625 } 4626 /* 4627 * start action section 4628 */ 4629 rule->act_ofs = dst - rule->cmd; 4630 4631 /* 4632 * put back O_LOG, O_ALTQ if necessary 4633 */ 4634 if (have_log) { 4635 i = F_LEN(have_log); 4636 bcopy(have_log, dst, i * sizeof(uint32_t)); 4637 dst += i; 4638 } 4639 if (have_altq) { 4640 i = F_LEN(have_altq); 4641 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4642 dst += i; 4643 } 4644 /* 4645 * copy all other actions 4646 */ 4647 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4648 i = F_LEN(src); 4649 bcopy(src, dst, i * sizeof(uint32_t)); 4650 dst += i; 4651 } 4652 4653 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4654 i = (char *)dst - (char *)rule; 4655 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 4656 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 4657 if (!do_quiet) 4658 show_ipfw(rule, 0, 0); 4659 } 4660 4661 static void 4662 zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 4663 { 4664 int rulenum; 4665 int failed = EX_OK; 4666 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 4667 4668 av++; ac--; 4669 4670 if (!ac) { 4671 /* clear all entries */ 4672 if (do_cmd(optname, NULL, 0) < 0) 4673 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 4674 if (!do_quiet) 4675 printf("%s.\n", optname == IP_FW_ZERO ? 4676 "Accounting cleared":"Logging counts reset"); 4677 4678 return; 4679 } 4680 4681 while (ac) { 4682 /* Rule number */ 4683 if (isdigit(**av)) { 4684 rulenum = atoi(*av); 4685 av++; 4686 ac--; 4687 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 4688 warn("rule %u: setsockopt(IP_FW_%s)", 4689 rulenum, name); 4690 failed = EX_UNAVAILABLE; 4691 } else if (!do_quiet) 4692 printf("Entry %d %s.\n", rulenum, 4693 optname == IP_FW_ZERO ? 4694 "cleared" : "logging count reset"); 4695 } else { 4696 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4697 } 4698 } 4699 if (failed != EX_OK) 4700 exit(failed); 4701 } 4702 4703 static void 4704 flush(int force) 4705 { 4706 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 4707 4708 if (!force && !do_quiet) { /* need to ask user */ 4709 int c; 4710 4711 printf("Are you sure? [yn] "); 4712 fflush(stdout); 4713 do { 4714 c = toupper(getc(stdin)); 4715 while (c != '\n' && getc(stdin) != '\n') 4716 if (feof(stdin)) 4717 return; /* and do not flush */ 4718 } while (c != 'Y' && c != 'N'); 4719 printf("\n"); 4720 if (c == 'N') /* user said no */ 4721 return; 4722 } 4723 if (do_cmd(cmd, NULL, 0) < 0) 4724 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 4725 do_pipe ? "DUMMYNET" : "FW"); 4726 if (!do_quiet) 4727 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 4728 } 4729 4730 /* 4731 * Free a the (locally allocated) copy of command line arguments. 4732 */ 4733 static void 4734 free_args(int ac, char **av) 4735 { 4736 int i; 4737 4738 for (i=0; i < ac; i++) 4739 free(av[i]); 4740 free(av); 4741 } 4742 4743 /* 4744 * This one handles all table-related commands 4745 * ipfw table N add addr[/masklen] [value] 4746 * ipfw table N delete addr[/masklen] 4747 * ipfw table N flush 4748 * ipfw table N list 4749 */ 4750 static void 4751 table_handler(int ac, char *av[]) 4752 { 4753 ipfw_table_entry ent; 4754 ipfw_table *tbl; 4755 int do_add; 4756 char *p; 4757 socklen_t l; 4758 uint32_t a; 4759 4760 ac--; av++; 4761 if (ac && isdigit(**av)) { 4762 ent.tbl = atoi(*av); 4763 ac--; av++; 4764 } else 4765 errx(EX_USAGE, "table number required"); 4766 NEED1("table needs command"); 4767 if (_substrcmp(*av, "add") == 0 || 4768 _substrcmp(*av, "delete") == 0) { 4769 do_add = **av == 'a'; 4770 ac--; av++; 4771 if (!ac) 4772 errx(EX_USAGE, "IP address required"); 4773 p = strchr(*av, '/'); 4774 if (p) { 4775 *p++ = '\0'; 4776 ent.masklen = atoi(p); 4777 if (ent.masklen > 32) 4778 errx(EX_DATAERR, "bad width ``%s''", p); 4779 } else 4780 ent.masklen = 32; 4781 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 4782 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4783 ac--; av++; 4784 if (do_add && ac) 4785 ent.value = strtoul(*av, NULL, 0); 4786 else 4787 ent.value = 0; 4788 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 4789 &ent, sizeof(ent)) < 0) 4790 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 4791 do_add ? "ADD" : "DEL"); 4792 } else if (_substrcmp(*av, "flush") == 0) { 4793 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4794 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4795 } else if (_substrcmp(*av, "list") == 0) { 4796 a = ent.tbl; 4797 l = sizeof(a); 4798 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4799 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4800 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4801 tbl = malloc(l); 4802 if (tbl == NULL) 4803 err(EX_OSERR, "malloc"); 4804 tbl->tbl = ent.tbl; 4805 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 4806 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 4807 for (a = 0; a < tbl->cnt; a++) { 4808 printf("%s/%u %u\n", 4809 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 4810 tbl->ent[a].masklen, tbl->ent[a].value); 4811 } 4812 } else 4813 errx(EX_USAGE, "invalid table command %s", *av); 4814 } 4815 4816 /* 4817 * Called with the arguments (excluding program name). 4818 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 4819 */ 4820 static int 4821 ipfw_main(int oldac, char **oldav) 4822 { 4823 int ch, ac, save_ac; 4824 char **av, **save_av; 4825 int do_acct = 0; /* Show packet/byte count */ 4826 4827 #define WHITESP " \t\f\v\n\r" 4828 if (oldac == 0) 4829 return 1; 4830 else if (oldac == 1) { 4831 /* 4832 * If we are called with a single string, try to split it into 4833 * arguments for subsequent parsing. 4834 * But first, remove spaces after a ',', by copying the string 4835 * in-place. 4836 */ 4837 char *arg = oldav[0]; /* The string... */ 4838 int l = strlen(arg); 4839 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 4840 int i, j; 4841 for (i = j = 0; i < l; i++) { 4842 if (arg[i] == '#') /* comment marker */ 4843 break; 4844 if (copy) { 4845 arg[j++] = arg[i]; 4846 copy = !index("," WHITESP, arg[i]); 4847 } else { 4848 copy = !index(WHITESP, arg[i]); 4849 if (copy) 4850 arg[j++] = arg[i]; 4851 } 4852 } 4853 if (!copy && j > 0) /* last char was a 'blank', remove it */ 4854 j--; 4855 l = j; /* the new argument length */ 4856 arg[j++] = '\0'; 4857 if (l == 0) /* empty string! */ 4858 return 1; 4859 4860 /* 4861 * First, count number of arguments. Because of the previous 4862 * processing, this is just the number of blanks plus 1. 4863 */ 4864 for (i = 0, ac = 1; i < l; i++) 4865 if (index(WHITESP, arg[i]) != NULL) 4866 ac++; 4867 4868 av = calloc(ac, sizeof(char *)); 4869 4870 /* 4871 * Second, copy arguments from cmd[] to av[]. For each one, 4872 * j is the initial character, i is the one past the end. 4873 */ 4874 for (ac = 0, i = j = 0; i < l; i++) 4875 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 4876 if (i == l-1) 4877 i++; 4878 av[ac] = calloc(i-j+1, 1); 4879 bcopy(arg+j, av[ac], i-j); 4880 ac++; 4881 j = i + 1; 4882 } 4883 } else { 4884 /* 4885 * If an argument ends with ',' join with the next one. 4886 */ 4887 int first, i, l; 4888 4889 av = calloc(oldac, sizeof(char *)); 4890 for (first = i = ac = 0, l = 0; i < oldac; i++) { 4891 char *arg = oldav[i]; 4892 int k = strlen(arg); 4893 4894 l += k; 4895 if (arg[k-1] != ',' || i == oldac-1) { 4896 /* Time to copy. */ 4897 av[ac] = calloc(l+1, 1); 4898 for (l=0; first <= i; first++) { 4899 strcat(av[ac]+l, oldav[first]); 4900 l += strlen(oldav[first]); 4901 } 4902 ac++; 4903 l = 0; 4904 first = i+1; 4905 } 4906 } 4907 } 4908 4909 /* Set the force flag for non-interactive processes */ 4910 if (!do_force) 4911 do_force = !isatty(STDIN_FILENO); 4912 4913 /* Save arguments for final freeing of memory. */ 4914 save_ac = ac; 4915 save_av = av; 4916 4917 optind = optreset = 0; 4918 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 4919 switch (ch) { 4920 case 'a': 4921 do_acct = 1; 4922 break; 4923 4924 case 'b': 4925 comment_only = 1; 4926 do_compact = 1; 4927 break; 4928 4929 case 'c': 4930 do_compact = 1; 4931 break; 4932 4933 case 'd': 4934 do_dynamic = 1; 4935 break; 4936 4937 case 'e': 4938 do_expired = 1; 4939 break; 4940 4941 case 'f': 4942 do_force = 1; 4943 break; 4944 4945 case 'h': /* help */ 4946 free_args(save_ac, save_av); 4947 help(); 4948 break; /* NOTREACHED */ 4949 4950 case 'n': 4951 test_only = 1; 4952 break; 4953 4954 case 'N': 4955 do_resolv = 1; 4956 break; 4957 4958 case 'q': 4959 do_quiet = 1; 4960 break; 4961 4962 case 's': /* sort */ 4963 do_sort = atoi(optarg); 4964 break; 4965 4966 case 'S': 4967 show_sets = 1; 4968 break; 4969 4970 case 't': 4971 do_time = 1; 4972 break; 4973 4974 case 'T': 4975 do_time = 2; /* numeric timestamp */ 4976 break; 4977 4978 case 'v': /* verbose */ 4979 verbose = 1; 4980 break; 4981 4982 default: 4983 free_args(save_ac, save_av); 4984 return 1; 4985 } 4986 4987 ac -= optind; 4988 av += optind; 4989 NEED1("bad arguments, for usage summary ``ipfw''"); 4990 4991 /* 4992 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 4993 * e.g. "100 add allow ..." instead of "add 100 allow ...". 4994 * In case, swap first and second argument to get the normal form. 4995 */ 4996 if (ac > 1 && isdigit(*av[0])) { 4997 char *p = av[0]; 4998 4999 av[0] = av[1]; 5000 av[1] = p; 5001 } 5002 5003 /* 5004 * optional: pipe or queue 5005 */ 5006 do_pipe = 0; 5007 if (_substrcmp(*av, "pipe") == 0) 5008 do_pipe = 1; 5009 else if (_substrcmp(*av, "queue") == 0) 5010 do_pipe = 2; 5011 if (do_pipe) { 5012 ac--; 5013 av++; 5014 } 5015 NEED1("missing command"); 5016 5017 /* 5018 * For pipes and queues we normally say 'pipe NN config' 5019 * but the code is easier to parse as 'pipe config NN' 5020 * so we swap the two arguments. 5021 */ 5022 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 5023 char *p = av[0]; 5024 5025 av[0] = av[1]; 5026 av[1] = p; 5027 } 5028 5029 if (_substrcmp(*av, "add") == 0) 5030 add(ac, av); 5031 else if (do_pipe && _substrcmp(*av, "config") == 0) 5032 config_pipe(ac, av); 5033 else if (_substrcmp(*av, "delete") == 0) 5034 delete(ac, av); 5035 else if (_substrcmp(*av, "flush") == 0) 5036 flush(do_force); 5037 else if (_substrcmp(*av, "zero") == 0) 5038 zero(ac, av, IP_FW_ZERO); 5039 else if (_substrcmp(*av, "resetlog") == 0) 5040 zero(ac, av, IP_FW_RESETLOG); 5041 else if (_substrcmp(*av, "print") == 0 || 5042 _substrcmp(*av, "list") == 0) 5043 list(ac, av, do_acct); 5044 else if (_substrcmp(*av, "set") == 0) 5045 sets_handler(ac, av); 5046 else if (_substrcmp(*av, "table") == 0) 5047 table_handler(ac, av); 5048 else if (_substrcmp(*av, "enable") == 0) 5049 sysctl_handler(ac, av, 1); 5050 else if (_substrcmp(*av, "disable") == 0) 5051 sysctl_handler(ac, av, 0); 5052 else if (_substrcmp(*av, "show") == 0) 5053 list(ac, av, 1 /* show counters */); 5054 else 5055 errx(EX_USAGE, "bad command `%s'", *av); 5056 5057 /* Free memory allocated in the argument parsing. */ 5058 free_args(save_ac, save_av); 5059 return 0; 5060 } 5061 5062 5063 static void 5064 ipfw_readfile(int ac, char *av[]) 5065 { 5066 #define MAX_ARGS 32 5067 char buf[BUFSIZ]; 5068 char *cmd = NULL, *filename = av[ac-1]; 5069 int c, lineno=0; 5070 FILE *f = NULL; 5071 pid_t preproc = 0; 5072 5073 filename = av[ac-1]; 5074 5075 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 5076 switch(c) { 5077 case 'c': 5078 do_compact = 1; 5079 break; 5080 5081 case 'f': 5082 do_force = 1; 5083 break; 5084 5085 case 'N': 5086 do_resolv = 1; 5087 break; 5088 5089 case 'n': 5090 test_only = 1; 5091 break; 5092 5093 case 'p': 5094 cmd = optarg; 5095 /* 5096 * Skip previous args and delete last one, so we 5097 * pass all but the last argument to the preprocessor 5098 * via av[optind-1] 5099 */ 5100 av += optind - 1; 5101 ac -= optind - 1; 5102 av[ac-1] = NULL; 5103 fprintf(stderr, "command is %s\n", av[0]); 5104 break; 5105 5106 case 'q': 5107 do_quiet = 1; 5108 break; 5109 5110 case 'S': 5111 show_sets = 1; 5112 break; 5113 5114 default: 5115 errx(EX_USAGE, "bad arguments, for usage" 5116 " summary ``ipfw''"); 5117 } 5118 5119 if (cmd != NULL) 5120 break; 5121 } 5122 5123 if (cmd == NULL && ac != optind + 1) { 5124 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 5125 errx(EX_USAGE, "extraneous filename arguments"); 5126 } 5127 5128 if ((f = fopen(filename, "r")) == NULL) 5129 err(EX_UNAVAILABLE, "fopen: %s", filename); 5130 5131 if (cmd != NULL) { /* pipe through preprocessor */ 5132 int pipedes[2]; 5133 5134 if (pipe(pipedes) == -1) 5135 err(EX_OSERR, "cannot create pipe"); 5136 5137 preproc = fork(); 5138 if (preproc == -1) 5139 err(EX_OSERR, "cannot fork"); 5140 5141 if (preproc == 0) { 5142 /* 5143 * Child, will run the preprocessor with the 5144 * file on stdin and the pipe on stdout. 5145 */ 5146 if (dup2(fileno(f), 0) == -1 5147 || dup2(pipedes[1], 1) == -1) 5148 err(EX_OSERR, "dup2()"); 5149 fclose(f); 5150 close(pipedes[1]); 5151 close(pipedes[0]); 5152 execvp(cmd, av); 5153 err(EX_OSERR, "execvp(%s) failed", cmd); 5154 } else { /* parent, will reopen f as the pipe */ 5155 fclose(f); 5156 close(pipedes[1]); 5157 if ((f = fdopen(pipedes[0], "r")) == NULL) { 5158 int savederrno = errno; 5159 5160 (void)kill(preproc, SIGTERM); 5161 errno = savederrno; 5162 err(EX_OSERR, "fdopen()"); 5163 } 5164 } 5165 } 5166 5167 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 5168 char linename[10]; 5169 char *args[1]; 5170 5171 lineno++; 5172 sprintf(linename, "Line %d", lineno); 5173 setprogname(linename); /* XXX */ 5174 args[0] = buf; 5175 ipfw_main(1, args); 5176 } 5177 fclose(f); 5178 if (cmd != NULL) { 5179 int status; 5180 5181 if (waitpid(preproc, &status, 0) == -1) 5182 errx(EX_OSERR, "waitpid()"); 5183 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 5184 errx(EX_UNAVAILABLE, 5185 "preprocessor exited with status %d", 5186 WEXITSTATUS(status)); 5187 else if (WIFSIGNALED(status)) 5188 errx(EX_UNAVAILABLE, 5189 "preprocessor exited with signal %d", 5190 WTERMSIG(status)); 5191 } 5192 } 5193 5194 int 5195 main(int ac, char *av[]) 5196 { 5197 /* 5198 * If the last argument is an absolute pathname, interpret it 5199 * as a file to be preprocessed. 5200 */ 5201 5202 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 5203 ipfw_readfile(ac, av); 5204 else { 5205 if (ipfw_main(ac-1, av+1)) 5206 show_usage(); 5207 } 5208 return EX_OK; 5209 } 5210