ipfw2.c revision 145566
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: head/sbin/ipfw/ipfw2.c 145566 2005-04-26 20:00:07Z brooks $ 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 63int 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 */ 93struct _s_x { 94 char const *s; 95 int x; 96}; 97 98static 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 109static 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 */ 125static 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 134static 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 145static 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 159static 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 187static void show_usage(void); 188 189enum 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 280struct _s_x dummynet_params[] = { 281 { "plr", TOK_PLR }, 282 { "noerror", TOK_NOERROR }, 283 { "buckets", TOK_BUCKETS }, 284 { "dst-ip", TOK_DSTIP }, 285 { "src-ip", TOK_SRCIP }, 286 { "dst-port", TOK_DSTPORT }, 287 { "src-port", TOK_SRCPORT }, 288 { "proto", TOK_PROTO }, 289 { "weight", TOK_WEIGHT }, 290 { "all", TOK_ALL }, 291 { "mask", TOK_MASK }, 292 { "droptail", TOK_DROPTAIL }, 293 { "red", TOK_RED }, 294 { "gred", TOK_GRED }, 295 { "bw", TOK_BW }, 296 { "bandwidth", TOK_BW }, 297 { "delay", TOK_DELAY }, 298 { "pipe", TOK_PIPE }, 299 { "queue", TOK_QUEUE }, 300 { "flow-id", TOK_FLOWID}, 301 { "dst-ipv6", TOK_DSTIP6}, 302 { "dst-ip6", TOK_DSTIP6}, 303 { "src-ipv6", TOK_SRCIP6}, 304 { "src-ip6", TOK_SRCIP6}, 305 { "dummynet-params", TOK_NULL }, 306 { NULL, 0 } /* terminator */ 307}; 308 309struct _s_x rule_actions[] = { 310 { "accept", TOK_ACCEPT }, 311 { "pass", TOK_ACCEPT }, 312 { "allow", TOK_ACCEPT }, 313 { "permit", TOK_ACCEPT }, 314 { "count", TOK_COUNT }, 315 { "pipe", TOK_PIPE }, 316 { "queue", TOK_QUEUE }, 317 { "divert", TOK_DIVERT }, 318 { "tee", TOK_TEE }, 319 { "netgraph", TOK_NETGRAPH }, 320 { "ngtee", TOK_NGTEE }, 321 { "fwd", TOK_FORWARD }, 322 { "forward", TOK_FORWARD }, 323 { "skipto", TOK_SKIPTO }, 324 { "deny", TOK_DENY }, 325 { "drop", TOK_DENY }, 326 { "reject", TOK_REJECT }, 327 { "reset", TOK_RESET }, 328 { "unreach", TOK_UNREACH }, 329 { "check-state", TOK_CHECKSTATE }, 330 { "//", TOK_COMMENT }, 331 { NULL, 0 } /* terminator */ 332}; 333 334struct _s_x rule_action_params[] = { 335 { "altq", TOK_ALTQ }, 336 { "log", TOK_LOG }, 337 { NULL, 0 } /* terminator */ 338}; 339 340struct _s_x rule_options[] = { 341 { "uid", TOK_UID }, 342 { "gid", TOK_GID }, 343 { "jail", TOK_JAIL }, 344 { "in", TOK_IN }, 345 { "limit", TOK_LIMIT }, 346 { "keep-state", TOK_KEEPSTATE }, 347 { "bridged", TOK_LAYER2 }, 348 { "layer2", TOK_LAYER2 }, 349 { "out", TOK_OUT }, 350 { "diverted", TOK_DIVERTED }, 351 { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 352 { "diverted-output", TOK_DIVERTEDOUTPUT }, 353 { "xmit", TOK_XMIT }, 354 { "recv", TOK_RECV }, 355 { "via", TOK_VIA }, 356 { "fragment", TOK_FRAG }, 357 { "frag", TOK_FRAG }, 358 { "ipoptions", TOK_IPOPTS }, 359 { "ipopts", TOK_IPOPTS }, 360 { "iplen", TOK_IPLEN }, 361 { "ipid", TOK_IPID }, 362 { "ipprecedence", TOK_IPPRECEDENCE }, 363 { "iptos", TOK_IPTOS }, 364 { "ipttl", TOK_IPTTL }, 365 { "ipversion", TOK_IPVER }, 366 { "ipver", TOK_IPVER }, 367 { "estab", TOK_ESTAB }, 368 { "established", TOK_ESTAB }, 369 { "setup", TOK_SETUP }, 370 { "tcpdatalen", TOK_TCPDATALEN }, 371 { "tcpflags", TOK_TCPFLAGS }, 372 { "tcpflgs", TOK_TCPFLAGS }, 373 { "tcpoptions", TOK_TCPOPTS }, 374 { "tcpopts", TOK_TCPOPTS }, 375 { "tcpseq", TOK_TCPSEQ }, 376 { "tcpack", TOK_TCPACK }, 377 { "tcpwin", TOK_TCPWIN }, 378 { "icmptype", TOK_ICMPTYPES }, 379 { "icmptypes", TOK_ICMPTYPES }, 380 { "dst-ip", TOK_DSTIP }, 381 { "src-ip", TOK_SRCIP }, 382 { "dst-port", TOK_DSTPORT }, 383 { "src-port", TOK_SRCPORT }, 384 { "proto", TOK_PROTO }, 385 { "MAC", TOK_MAC }, 386 { "mac", TOK_MAC }, 387 { "mac-type", TOK_MACTYPE }, 388 { "verrevpath", TOK_VERREVPATH }, 389 { "versrcreach", TOK_VERSRCREACH }, 390 { "antispoof", TOK_ANTISPOOF }, 391 { "ipsec", TOK_IPSEC }, 392 { "icmp6type", TOK_ICMP6TYPES }, 393 { "icmp6types", TOK_ICMP6TYPES }, 394 { "ext6hdr", TOK_EXT6HDR}, 395 { "flow-id", TOK_FLOWID}, 396 { "ipv6", TOK_IPV6}, 397 { "ip6", TOK_IPV6}, 398 { "dst-ipv6", TOK_DSTIP6}, 399 { "dst-ip6", TOK_DSTIP6}, 400 { "src-ipv6", TOK_SRCIP6}, 401 { "src-ip6", TOK_SRCIP6}, 402 { "//", TOK_COMMENT }, 403 404 { "not", TOK_NOT }, /* pseudo option */ 405 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 406 { "or", TOK_OR }, /* pseudo option */ 407 { "|", /* escape */ TOK_OR }, /* pseudo option */ 408 { "{", TOK_STARTBRACE }, /* pseudo option */ 409 { "(", TOK_STARTBRACE }, /* pseudo option */ 410 { "}", TOK_ENDBRACE }, /* pseudo option */ 411 { ")", TOK_ENDBRACE }, /* pseudo option */ 412 { NULL, 0 } /* terminator */ 413}; 414 415static __inline uint64_t 416align_uint64(uint64_t *pll) { 417 uint64_t ret; 418 419 bcopy (pll, &ret, sizeof(ret)); 420 return ret; 421} 422 423/* 424 * conditionally runs the command. 425 */ 426static int 427do_cmd(int optname, void *optval, uintptr_t optlen) 428{ 429 static int s = -1; /* the socket */ 430 int i; 431 432 if (test_only) 433 return 0; 434 435 if (s == -1) 436 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 437 if (s < 0) 438 err(EX_UNAVAILABLE, "socket"); 439 440 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 441 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 442 optname == IP_FW_TABLE_GETSIZE) 443 i = getsockopt(s, IPPROTO_IP, optname, optval, 444 (socklen_t *)optlen); 445 else 446 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 447 return i; 448} 449 450/** 451 * match_token takes a table and a string, returns the value associated 452 * with the string (-1 in case of failure). 453 */ 454static int 455match_token(struct _s_x *table, char *string) 456{ 457 struct _s_x *pt; 458 uint i = strlen(string); 459 460 for (pt = table ; i && pt->s != NULL ; pt++) 461 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 462 return pt->x; 463 return -1; 464} 465 466/** 467 * match_value takes a table and a value, returns the string associated 468 * with the value (NULL in case of failure). 469 */ 470static char const * 471match_value(struct _s_x *p, int value) 472{ 473 for (; p->s != NULL; p++) 474 if (p->x == value) 475 return p->s; 476 return NULL; 477} 478 479/* 480 * _substrcmp takes two strings and returns 1 if they do not match, 481 * and 0 if they match exactly or the first string is a sub-string 482 * of the second. A warning is printed to stderr in the case that the 483 * first string is a sub-string of the second. 484 * 485 * This function will be removed in the future through the usual 486 * deprecation process. 487 */ 488static int 489_substrcmp(const char *str1, const char* str2) 490{ 491 492 if (strncmp(str1, str2, strlen(str1)) != 0) 493 return 1; 494 495 if (strlen(str1) != strlen(str2)) 496 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 497 str1, str2); 498 return 0; 499} 500 501/* 502 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 503 * and 0 if they match exactly or the second string is a sub-string 504 * of the first. A warning is printed to stderr in the case that the 505 * first string does not match the third. 506 * 507 * This function exists to warn about the bizzare construction 508 * strncmp(str, "by", 2) which is used to allow people to use a shotcut 509 * for "bytes". The problem is that in addition to accepting "by", 510 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 511 * other string beginning with "by". 512 * 513 * This function will be removed in the future through the usual 514 * deprecation process. 515 */ 516static int 517_substrcmp2(const char *str1, const char* str2, const char* str3) 518{ 519 520 if (strncmp(str1, str2, strlen(str2)) != 0) 521 return 1; 522 523 if (strcmp(str1, str3) != 0) 524 warnx("DEPRECATED: '%s' matched '%s'", 525 str1, str3); 526 return 0; 527} 528 529/* 530 * prints one port, symbolic or numeric 531 */ 532static void 533print_port(int proto, uint16_t port) 534{ 535 536 if (proto == IPPROTO_ETHERTYPE) { 537 char const *s; 538 539 if (do_resolv && (s = match_value(ether_types, port)) ) 540 printf("%s", s); 541 else 542 printf("0x%04x", port); 543 } else { 544 struct servent *se = NULL; 545 if (do_resolv) { 546 struct protoent *pe = getprotobynumber(proto); 547 548 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 549 } 550 if (se) 551 printf("%s", se->s_name); 552 else 553 printf("%d", port); 554 } 555} 556 557struct _s_x _port_name[] = { 558 {"dst-port", O_IP_DSTPORT}, 559 {"src-port", O_IP_SRCPORT}, 560 {"ipid", O_IPID}, 561 {"iplen", O_IPLEN}, 562 {"ipttl", O_IPTTL}, 563 {"mac-type", O_MAC_TYPE}, 564 {"tcpdatalen", O_TCPDATALEN}, 565 {NULL, 0} 566}; 567 568/* 569 * Print the values in a list 16-bit items of the types above. 570 * XXX todo: add support for mask. 571 */ 572static void 573print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 574{ 575 uint16_t *p = cmd->ports; 576 int i; 577 char const *sep; 578 579 if (cmd->o.len & F_NOT) 580 printf(" not"); 581 if (opcode != 0) { 582 sep = match_value(_port_name, opcode); 583 if (sep == NULL) 584 sep = "???"; 585 printf (" %s", sep); 586 } 587 sep = " "; 588 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 589 printf(sep); 590 print_port(proto, p[0]); 591 if (p[0] != p[1]) { 592 printf("-"); 593 print_port(proto, p[1]); 594 } 595 sep = ","; 596 } 597} 598 599/* 600 * Like strtol, but also translates service names into port numbers 601 * for some protocols. 602 * In particular: 603 * proto == -1 disables the protocol check; 604 * proto == IPPROTO_ETHERTYPE looks up an internal table 605 * proto == <some value in /etc/protocols> matches the values there. 606 * Returns *end == s in case the parameter is not found. 607 */ 608static int 609strtoport(char *s, char **end, int base, int proto) 610{ 611 char *p, *buf; 612 char *s1; 613 int i; 614 615 *end = s; /* default - not found */ 616 if (*s == '\0') 617 return 0; /* not found */ 618 619 if (isdigit(*s)) 620 return strtol(s, end, base); 621 622 /* 623 * find separator. '\\' escapes the next char. 624 */ 625 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 626 if (*s1 == '\\' && s1[1] != '\0') 627 s1++; 628 629 buf = malloc(s1 - s + 1); 630 if (buf == NULL) 631 return 0; 632 633 /* 634 * copy into a buffer skipping backslashes 635 */ 636 for (p = s, i = 0; p != s1 ; p++) 637 if (*p != '\\') 638 buf[i++] = *p; 639 buf[i++] = '\0'; 640 641 if (proto == IPPROTO_ETHERTYPE) { 642 i = match_token(ether_types, buf); 643 free(buf); 644 if (i != -1) { /* found */ 645 *end = s1; 646 return i; 647 } 648 } else { 649 struct protoent *pe = NULL; 650 struct servent *se; 651 652 if (proto != 0) 653 pe = getprotobynumber(proto); 654 setservent(1); 655 se = getservbyname(buf, pe ? pe->p_name : NULL); 656 free(buf); 657 if (se != NULL) { 658 *end = s1; 659 return ntohs(se->s_port); 660 } 661 } 662 return 0; /* not found */ 663} 664 665/* 666 * Map between current altq queue id numbers and names. 667 */ 668static int altq_fetched = 0; 669static TAILQ_HEAD(, pf_altq) altq_entries = 670 TAILQ_HEAD_INITIALIZER(altq_entries); 671 672static void 673altq_set_enabled(int enabled) 674{ 675 int pffd; 676 677 pffd = open("/dev/pf", O_RDWR); 678 if (pffd == -1) 679 err(EX_UNAVAILABLE, 680 "altq support opening pf(4) control device"); 681 if (enabled) { 682 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST) 683 err(EX_UNAVAILABLE, "enabling altq"); 684 } else { 685 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT) 686 err(EX_UNAVAILABLE, "disabling altq"); 687 } 688 close(pffd); 689} 690 691static void 692altq_fetch() 693{ 694 struct pfioc_altq pfioc; 695 struct pf_altq *altq; 696 int pffd, mnr; 697 698 if (altq_fetched) 699 return; 700 altq_fetched = 1; 701 pffd = open("/dev/pf", O_RDONLY); 702 if (pffd == -1) { 703 warn("altq support opening pf(4) control device"); 704 return; 705 } 706 bzero(&pfioc, sizeof(pfioc)); 707 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) { 708 warn("altq support getting queue list"); 709 close(pffd); 710 return; 711 } 712 mnr = pfioc.nr; 713 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) { 714 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) { 715 if (errno == EBUSY) 716 break; 717 warn("altq support getting queue list"); 718 close(pffd); 719 return; 720 } 721 if (pfioc.altq.qid == 0) 722 continue; 723 altq = malloc(sizeof(*altq)); 724 if (altq == NULL) 725 err(EX_OSERR, "malloc"); 726 *altq = pfioc.altq; 727 TAILQ_INSERT_TAIL(&altq_entries, altq, entries); 728 } 729 close(pffd); 730} 731 732static u_int32_t 733altq_name_to_qid(const char *name) 734{ 735 struct pf_altq *altq; 736 737 altq_fetch(); 738 TAILQ_FOREACH(altq, &altq_entries, entries) 739 if (strcmp(name, altq->qname) == 0) 740 break; 741 if (altq == NULL) 742 errx(EX_DATAERR, "altq has no queue named `%s'", name); 743 return altq->qid; 744} 745 746static const char * 747altq_qid_to_name(u_int32_t qid) 748{ 749 struct pf_altq *altq; 750 751 altq_fetch(); 752 TAILQ_FOREACH(altq, &altq_entries, entries) 753 if (qid == altq->qid) 754 break; 755 if (altq == NULL) 756 return NULL; 757 return altq->qname; 758} 759 760static void 761fill_altq_qid(u_int32_t *qid, const char *av) 762{ 763 *qid = altq_name_to_qid(av); 764} 765 766/* 767 * Fill the body of the command with the list of port ranges. 768 */ 769static int 770fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 771{ 772 uint16_t a, b, *p = cmd->ports; 773 int i = 0; 774 char *s = av; 775 776 while (*s) { 777 a = strtoport(av, &s, 0, proto); 778 if (s == av) /* no parameter */ 779 break; 780 if (*s == '-') { /* a range */ 781 av = s+1; 782 b = strtoport(av, &s, 0, proto); 783 if (s == av) /* no parameter */ 784 break; 785 p[0] = a; 786 p[1] = b; 787 } else if (*s == ',' || *s == '\0' ) 788 p[0] = p[1] = a; 789 else /* invalid separator */ 790 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 791 *s, av); 792 i++; 793 p += 2; 794 av = s+1; 795 } 796 if (i > 0) { 797 if (i+1 > F_LEN_MASK) 798 errx(EX_DATAERR, "too many ports/ranges\n"); 799 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 800 } 801 return i; 802} 803 804static struct _s_x icmpcodes[] = { 805 { "net", ICMP_UNREACH_NET }, 806 { "host", ICMP_UNREACH_HOST }, 807 { "protocol", ICMP_UNREACH_PROTOCOL }, 808 { "port", ICMP_UNREACH_PORT }, 809 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 810 { "srcfail", ICMP_UNREACH_SRCFAIL }, 811 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 812 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 813 { "isolated", ICMP_UNREACH_ISOLATED }, 814 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 815 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 816 { "tosnet", ICMP_UNREACH_TOSNET }, 817 { "toshost", ICMP_UNREACH_TOSHOST }, 818 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 819 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 820 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 821 { NULL, 0 } 822}; 823 824static void 825fill_reject_code(u_short *codep, char *str) 826{ 827 int val; 828 char *s; 829 830 val = strtoul(str, &s, 0); 831 if (s == str || *s != '\0' || val >= 0x100) 832 val = match_token(icmpcodes, str); 833 if (val < 0) 834 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 835 *codep = val; 836 return; 837} 838 839static void 840print_reject_code(uint16_t code) 841{ 842 char const *s = match_value(icmpcodes, code); 843 844 if (s != NULL) 845 printf("unreach %s", s); 846 else 847 printf("unreach %u", code); 848} 849 850/* 851 * Returns the number of bits set (from left) in a contiguous bitmask, 852 * or -1 if the mask is not contiguous. 853 * XXX this needs a proper fix. 854 * This effectively works on masks in big-endian (network) format. 855 * when compiled on little endian architectures. 856 * 857 * First bit is bit 7 of the first byte -- note, for MAC addresses, 858 * the first bit on the wire is bit 0 of the first byte. 859 * len is the max length in bits. 860 */ 861static int 862contigmask(uint8_t *p, int len) 863{ 864 int i, n; 865 866 for (i=0; i<len ; i++) 867 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 868 break; 869 for (n=i+1; n < len; n++) 870 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 871 return -1; /* mask not contiguous */ 872 return i; 873} 874 875/* 876 * print flags set/clear in the two bitmasks passed as parameters. 877 * There is a specialized check for f_tcpflags. 878 */ 879static void 880print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 881{ 882 char const *comma = ""; 883 int i; 884 uint8_t set = cmd->arg1 & 0xff; 885 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 886 887 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 888 printf(" setup"); 889 return; 890 } 891 892 printf(" %s ", name); 893 for (i=0; list[i].x != 0; i++) { 894 if (set & list[i].x) { 895 set &= ~list[i].x; 896 printf("%s%s", comma, list[i].s); 897 comma = ","; 898 } 899 if (clear & list[i].x) { 900 clear &= ~list[i].x; 901 printf("%s!%s", comma, list[i].s); 902 comma = ","; 903 } 904 } 905} 906 907/* 908 * Print the ip address contained in a command. 909 */ 910static void 911print_ip(ipfw_insn_ip *cmd, char const *s) 912{ 913 struct hostent *he = NULL; 914 int len = F_LEN((ipfw_insn *)cmd); 915 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 916 917 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 918 919 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 920 printf("me"); 921 return; 922 } 923 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 924 cmd->o.opcode == O_IP_DST_LOOKUP) { 925 printf("table(%u", ((ipfw_insn *)cmd)->arg1); 926 if (len == F_INSN_SIZE(ipfw_insn_u32)) 927 printf(",%u", *a); 928 printf(")"); 929 return; 930 } 931 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 932 uint32_t x, *map = (uint32_t *)&(cmd->mask); 933 int i, j; 934 char comma = '{'; 935 936 x = cmd->o.arg1 - 1; 937 x = htonl( ~x ); 938 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 939 printf("%s/%d", inet_ntoa(cmd->addr), 940 contigmask((uint8_t *)&x, 32)); 941 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 942 x &= 0xff; /* base */ 943 /* 944 * Print bits and ranges. 945 * Locate first bit set (i), then locate first bit unset (j). 946 * If we have 3+ consecutive bits set, then print them as a 947 * range, otherwise only print the initial bit and rescan. 948 */ 949 for (i=0; i < cmd->o.arg1; i++) 950 if (map[i/32] & (1<<(i & 31))) { 951 for (j=i+1; j < cmd->o.arg1; j++) 952 if (!(map[ j/32] & (1<<(j & 31)))) 953 break; 954 printf("%c%d", comma, i+x); 955 if (j>i+2) { /* range has at least 3 elements */ 956 printf("-%d", j-1+x); 957 i = j-1; 958 } 959 comma = ','; 960 } 961 printf("}"); 962 return; 963 } 964 /* 965 * len == 2 indicates a single IP, whereas lists of 1 or more 966 * addr/mask pairs have len = (2n+1). We convert len to n so we 967 * use that to count the number of entries. 968 */ 969 for (len = len / 2; len > 0; len--, a += 2) { 970 int mb = /* mask length */ 971 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 972 32 : contigmask((uint8_t *)&(a[1]), 32); 973 if (mb == 32 && do_resolv) 974 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 975 if (he != NULL) /* resolved to name */ 976 printf("%s", he->h_name); 977 else if (mb == 0) /* any */ 978 printf("any"); 979 else { /* numeric IP followed by some kind of mask */ 980 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 981 if (mb < 0) 982 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 983 else if (mb < 32) 984 printf("/%d", mb); 985 } 986 if (len > 1) 987 printf(","); 988 } 989} 990 991/* 992 * prints a MAC address/mask pair 993 */ 994static void 995print_mac(uint8_t *addr, uint8_t *mask) 996{ 997 int l = contigmask(mask, 48); 998 999 if (l == 0) 1000 printf(" any"); 1001 else { 1002 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 1003 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1004 if (l == -1) 1005 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 1006 mask[0], mask[1], mask[2], 1007 mask[3], mask[4], mask[5]); 1008 else if (l < 48) 1009 printf("/%d", l); 1010 } 1011} 1012 1013static void 1014fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1015{ 1016 uint8_t type; 1017 1018 cmd->d[0] = 0; 1019 while (*av) { 1020 if (*av == ',') 1021 av++; 1022 1023 type = strtoul(av, &av, 0); 1024 1025 if (*av != ',' && *av != '\0') 1026 errx(EX_DATAERR, "invalid ICMP type"); 1027 1028 if (type > 31) 1029 errx(EX_DATAERR, "ICMP type out of range"); 1030 1031 cmd->d[0] |= 1 << type; 1032 } 1033 cmd->o.opcode = O_ICMPTYPE; 1034 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1035} 1036 1037static void 1038print_icmptypes(ipfw_insn_u32 *cmd) 1039{ 1040 int i; 1041 char sep= ' '; 1042 1043 printf(" icmptypes"); 1044 for (i = 0; i < 32; i++) { 1045 if ( (cmd->d[0] & (1 << (i))) == 0) 1046 continue; 1047 printf("%c%d", sep, i); 1048 sep = ','; 1049 } 1050} 1051 1052/* 1053 * Print the ip address contained in a command. 1054 */ 1055static void 1056print_ip6(ipfw_insn_ip6 *cmd, char const *s) 1057{ 1058 struct hostent *he = NULL; 1059 int len = F_LEN((ipfw_insn *) cmd) - 1; 1060 struct in6_addr *a = &(cmd->addr6); 1061 char trad[255]; 1062 1063 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1064 1065 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) { 1066 printf("me6"); 1067 return; 1068 } 1069 if (cmd->o.opcode == O_IP6) { 1070 printf(" ipv6"); 1071 return; 1072 } 1073 1074 /* 1075 * len == 4 indicates a single IP, whereas lists of 1 or more 1076 * addr/mask pairs have len = (2n+1). We convert len to n so we 1077 * use that to count the number of entries. 1078 */ 1079 1080 for (len = len / 4; len > 0; len -= 2, a += 2) { 1081 int mb = /* mask length */ 1082 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ? 1083 128 : contigmask((uint8_t *)&(a[1]), 128); 1084 1085 if (mb == 128 && do_resolv) 1086 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6); 1087 if (he != NULL) /* resolved to name */ 1088 printf("%s", he->h_name); 1089 else if (mb == 0) /* any */ 1090 printf("any"); 1091 else { /* numeric IP followed by some kind of mask */ 1092 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL) 1093 printf("Error ntop in print_ip6\n"); 1094 printf("%s", trad ); 1095 if (mb < 0) /* XXX not really legal... */ 1096 printf(":%s", 1097 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad))); 1098 else if (mb < 128) 1099 printf("/%d", mb); 1100 } 1101 if (len > 2) 1102 printf(","); 1103 } 1104} 1105 1106static void 1107fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av) 1108{ 1109 uint8_t type; 1110 1111 cmd->d[0] = 0; 1112 while (*av) { 1113 if (*av == ',') 1114 av++; 1115 type = strtoul(av, &av, 0); 1116 if (*av != ',' && *av != '\0') 1117 errx(EX_DATAERR, "invalid ICMP6 type"); 1118 /* 1119 * XXX: shouldn't this be 0xFF? I can't see any reason why 1120 * we shouldn't be able to filter all possiable values 1121 * regardless of the ability of the rest of the kernel to do 1122 * anything useful with them. 1123 */ 1124 if (type > ICMP6_MAXTYPE) 1125 errx(EX_DATAERR, "ICMP6 type out of range"); 1126 cmd->d[type / 32] |= ( 1 << (type % 32)); 1127 } 1128 cmd->o.opcode = O_ICMP6TYPE; 1129 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6); 1130} 1131 1132 1133static void 1134print_icmp6types(ipfw_insn_u32 *cmd) 1135{ 1136 int i, j; 1137 char sep= ' '; 1138 1139 printf(" ipv6 icmp6types"); 1140 for (i = 0; i < 7; i++) 1141 for (j=0; j < 32; ++j) { 1142 if ( (cmd->d[i] & (1 << (j))) == 0) 1143 continue; 1144 printf("%c%d", sep, (i*32 + j)); 1145 sep = ','; 1146 } 1147} 1148 1149static void 1150print_flow6id( ipfw_insn_u32 *cmd) 1151{ 1152 uint16_t i, limit = cmd->o.arg1; 1153 char sep = ','; 1154 1155 printf(" flow-id "); 1156 for( i=0; i < limit; ++i) { 1157 if (i == limit - 1) 1158 sep = ' '; 1159 printf("%d%c", cmd->d[i], sep); 1160 } 1161} 1162 1163/* structure and define for the extension header in ipv6 */ 1164static struct _s_x ext6hdrcodes[] = { 1165 { "frag", EXT_FRAGMENT }, 1166 { "hopopt", EXT_HOPOPTS }, 1167 { "route", EXT_ROUTING }, 1168 { "ah", EXT_AH }, 1169 { "esp", EXT_ESP }, 1170 { NULL, 0 } 1171}; 1172 1173/* fills command for the extension header filtering */ 1174int 1175fill_ext6hdr( ipfw_insn *cmd, char *av) 1176{ 1177 int tok; 1178 char *s = av; 1179 1180 cmd->arg1 = 0; 1181 1182 while(s) { 1183 av = strsep( &s, ",") ; 1184 tok = match_token(ext6hdrcodes, av); 1185 switch (tok) { 1186 case EXT_FRAGMENT: 1187 cmd->arg1 |= EXT_FRAGMENT; 1188 break; 1189 1190 case EXT_HOPOPTS: 1191 cmd->arg1 |= EXT_HOPOPTS; 1192 break; 1193 1194 case EXT_ROUTING: 1195 cmd->arg1 |= EXT_ROUTING; 1196 break; 1197 1198 case EXT_AH: 1199 cmd->arg1 |= EXT_AH; 1200 break; 1201 1202 case EXT_ESP: 1203 cmd->arg1 |= EXT_ESP; 1204 break; 1205 1206 default: 1207 errx( EX_DATAERR, "invalid option for ipv6 exten header" ); 1208 break; 1209 } 1210 } 1211 if (cmd->arg1 == 0 ) 1212 return 0; 1213 cmd->opcode = O_EXT_HDR; 1214 cmd->len |= F_INSN_SIZE( ipfw_insn ); 1215 return 1; 1216} 1217 1218void 1219print_ext6hdr( ipfw_insn *cmd ) 1220{ 1221 char sep = ' '; 1222 1223 printf(" extension header:"); 1224 if (cmd->arg1 & EXT_FRAGMENT ) { 1225 printf("%cfragmentation", sep); 1226 sep = ','; 1227 } 1228 if (cmd->arg1 & EXT_HOPOPTS ) { 1229 printf("%chop options", sep); 1230 sep = ','; 1231 } 1232 if (cmd->arg1 & EXT_ROUTING ) { 1233 printf("%crouting options", sep); 1234 sep = ','; 1235 } 1236 if (cmd->arg1 & EXT_AH ) { 1237 printf("%cauthentication header", sep); 1238 sep = ','; 1239 } 1240 if (cmd->arg1 & EXT_ESP ) { 1241 printf("%cencapsulated security payload", sep); 1242 } 1243} 1244 1245/* 1246 * show_ipfw() prints the body of an ipfw rule. 1247 * Because the standard rule has at least proto src_ip dst_ip, we use 1248 * a helper function to produce these entries if not provided explicitly. 1249 * The first argument is the list of fields we have, the second is 1250 * the list of fields we want to be printed. 1251 * 1252 * Special cases if we have provided a MAC header: 1253 * + if the rule does not contain IP addresses/ports, do not print them; 1254 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1255 * 1256 * Once we have 'have_options', IP header fields are printed as options. 1257 */ 1258#define HAVE_PROTO 0x0001 1259#define HAVE_SRCIP 0x0002 1260#define HAVE_DSTIP 0x0004 1261#define HAVE_MAC 0x0008 1262#define HAVE_MACTYPE 0x0010 1263#define HAVE_PROTO6 0x0080 1264#define HAVE_OPTIONS 0x8000 1265 1266#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 1267static void 1268show_prerequisites(int *flags, int want, int cmd) 1269{ 1270 if (comment_only) 1271 return; 1272 if ( (*flags & HAVE_IP) == HAVE_IP) 1273 *flags |= HAVE_OPTIONS; 1274 1275 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 1276 cmd != O_MAC_TYPE) { 1277 /* 1278 * mac-type was optimized out by the compiler, 1279 * restore it 1280 */ 1281 printf(" any"); 1282 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 1283 return; 1284 } 1285 if ( !(*flags & HAVE_OPTIONS)) { 1286 /* XXX BED: !(*flags & HAVE_PROTO) in patch */ 1287 if ( !(*flags & HAVE_PROTO6) && (want & HAVE_PROTO6)) 1288 printf(" ipv6"); 1289 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 1290 printf(" ip"); 1291 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1292 printf(" from any"); 1293 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1294 printf(" to any"); 1295 } 1296 *flags |= want; 1297} 1298 1299static void 1300show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 1301{ 1302 static int twidth = 0; 1303 int l; 1304 ipfw_insn *cmd; 1305 char *comment = NULL; /* ptr to comment if we have one */ 1306 int proto = 0; /* default */ 1307 int flags = 0; /* prerequisites */ 1308 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1309 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1310 int or_block = 0; /* we are in an or block */ 1311 uint32_t set_disable; 1312 1313 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 1314 1315 if (set_disable & (1 << rule->set)) { /* disabled */ 1316 if (!show_sets) 1317 return; 1318 else 1319 printf("# DISABLED "); 1320 } 1321 printf("%05u ", rule->rulenum); 1322 1323 if (pcwidth>0 || bcwidth>0) 1324 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 1325 bcwidth, align_uint64(&rule->bcnt)); 1326 1327 if (do_time == 2) 1328 printf("%10u ", rule->timestamp); 1329 else if (do_time == 1) { 1330 char timestr[30]; 1331 time_t t = (time_t)0; 1332 1333 if (twidth == 0) { 1334 strcpy(timestr, ctime(&t)); 1335 *strchr(timestr, '\n') = '\0'; 1336 twidth = strlen(timestr); 1337 } 1338 if (rule->timestamp) { 1339#if _FreeBSD_version < 500000 /* XXX check */ 1340#define _long_to_time(x) (time_t)(x) 1341#endif 1342 t = _long_to_time(rule->timestamp); 1343 1344 strcpy(timestr, ctime(&t)); 1345 *strchr(timestr, '\n') = '\0'; 1346 printf("%s ", timestr); 1347 } else { 1348 printf("%*s", twidth, " "); 1349 } 1350 } 1351 1352 if (show_sets) 1353 printf("set %d ", rule->set); 1354 1355 /* 1356 * print the optional "match probability" 1357 */ 1358 if (rule->cmd_len > 0) { 1359 cmd = rule->cmd ; 1360 if (cmd->opcode == O_PROB) { 1361 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1362 double d = 1.0 * p->d[0]; 1363 1364 d = (d / 0x7fffffff); 1365 printf("prob %f ", d); 1366 } 1367 } 1368 1369 /* 1370 * first print actions 1371 */ 1372 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1373 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1374 switch(cmd->opcode) { 1375 case O_CHECK_STATE: 1376 printf("check-state"); 1377 flags = HAVE_IP; /* avoid printing anything else */ 1378 break; 1379 1380 case O_ACCEPT: 1381 printf("allow"); 1382 break; 1383 1384 case O_COUNT: 1385 printf("count"); 1386 break; 1387 1388 case O_DENY: 1389 printf("deny"); 1390 break; 1391 1392 case O_REJECT: 1393 if (cmd->arg1 == ICMP_REJECT_RST) 1394 printf("reset"); 1395 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1396 printf("reject"); 1397 else 1398 print_reject_code(cmd->arg1); 1399 break; 1400 1401 case O_SKIPTO: 1402 printf("skipto %u", cmd->arg1); 1403 break; 1404 1405 case O_PIPE: 1406 printf("pipe %u", cmd->arg1); 1407 break; 1408 1409 case O_QUEUE: 1410 printf("queue %u", cmd->arg1); 1411 break; 1412 1413 case O_DIVERT: 1414 printf("divert %u", cmd->arg1); 1415 break; 1416 1417 case O_TEE: 1418 printf("tee %u", cmd->arg1); 1419 break; 1420 1421 case O_NETGRAPH: 1422 printf("netgraph %u", cmd->arg1); 1423 break; 1424 1425 case O_NGTEE: 1426 printf("ngtee %u", cmd->arg1); 1427 break; 1428 1429 case O_FORWARD_IP: 1430 { 1431 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1432 1433 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1434 if (s->sa.sin_port) 1435 printf(",%d", s->sa.sin_port); 1436 } 1437 break; 1438 1439 case O_LOG: /* O_LOG is printed last */ 1440 logptr = (ipfw_insn_log *)cmd; 1441 break; 1442 1443 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1444 altqptr = (ipfw_insn_altq *)cmd; 1445 break; 1446 1447 default: 1448 printf("** unrecognized action %d len %d ", 1449 cmd->opcode, cmd->len); 1450 } 1451 } 1452 if (logptr) { 1453 if (logptr->max_log > 0) 1454 printf(" log logamount %d", logptr->max_log); 1455 else 1456 printf(" log"); 1457 } 1458 if (altqptr) { 1459 const char *qname; 1460 1461 qname = altq_qid_to_name(altqptr->qid); 1462 if (qname == NULL) 1463 printf(" altq ?<%u>", altqptr->qid); 1464 else 1465 printf(" altq %s", qname); 1466 } 1467 1468 /* 1469 * then print the body. 1470 */ 1471 if (rule->_pad & 1) { /* empty rules before options */ 1472 if (!do_compact) 1473 printf(" ip from any to any"); 1474 flags |= HAVE_IP | HAVE_OPTIONS; 1475 } 1476 1477 if (comment_only) 1478 comment = "..."; 1479 1480 for (l = rule->act_ofs, cmd = rule->cmd ; 1481 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1482 /* useful alias */ 1483 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1484 1485 if (comment_only) { 1486 if (cmd->opcode != O_NOP) 1487 continue; 1488 printf(" // %s\n", (char *)(cmd + 1)); 1489 return; 1490 } 1491 1492 show_prerequisites(&flags, 0, cmd->opcode); 1493 1494 switch(cmd->opcode) { 1495 case O_PROB: 1496 break; /* done already */ 1497 1498 case O_PROBE_STATE: 1499 break; /* no need to print anything here */ 1500 1501 case O_MACADDR2: { 1502 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1503 1504 if ((cmd->len & F_OR) && !or_block) 1505 printf(" {"); 1506 if (cmd->len & F_NOT) 1507 printf(" not"); 1508 printf(" MAC"); 1509 flags |= HAVE_MAC; 1510 print_mac(m->addr, m->mask); 1511 print_mac(m->addr + 6, m->mask + 6); 1512 } 1513 break; 1514 1515 case O_MAC_TYPE: 1516 if ((cmd->len & F_OR) && !or_block) 1517 printf(" {"); 1518 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1519 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1520 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1521 break; 1522 1523 case O_IP_SRC: 1524 case O_IP_SRC_LOOKUP: 1525 case O_IP_SRC_MASK: 1526 case O_IP_SRC_ME: 1527 case O_IP_SRC_SET: 1528 show_prerequisites(&flags, HAVE_PROTO, 0); 1529 if (!(flags & HAVE_SRCIP)) 1530 printf(" from"); 1531 if ((cmd->len & F_OR) && !or_block) 1532 printf(" {"); 1533 print_ip((ipfw_insn_ip *)cmd, 1534 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1535 flags |= HAVE_SRCIP; 1536 break; 1537 1538 case O_IP_DST: 1539 case O_IP_DST_LOOKUP: 1540 case O_IP_DST_MASK: 1541 case O_IP_DST_ME: 1542 case O_IP_DST_SET: 1543 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1544 if (!(flags & HAVE_DSTIP)) 1545 printf(" to"); 1546 if ((cmd->len & F_OR) && !or_block) 1547 printf(" {"); 1548 print_ip((ipfw_insn_ip *)cmd, 1549 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1550 flags |= HAVE_DSTIP; 1551 break; 1552 1553 case O_IP6_SRC: 1554 case O_IP6_SRC_MASK: 1555 case O_IP6_SRC_ME: 1556 show_prerequisites(&flags, HAVE_PROTO6, 0); 1557 if (!(flags & HAVE_SRCIP)) 1558 printf(" from"); 1559 if ((cmd->len & F_OR) && !or_block) 1560 printf(" {"); 1561 print_ip6((ipfw_insn_ip6 *)cmd, 1562 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1563 flags |= HAVE_SRCIP | HAVE_PROTO; 1564 break; 1565 1566 case O_IP6_DST: 1567 case O_IP6_DST_MASK: 1568 case O_IP6_DST_ME: 1569 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1570 if (!(flags & HAVE_DSTIP)) 1571 printf(" to"); 1572 if ((cmd->len & F_OR) && !or_block) 1573 printf(" {"); 1574 print_ip6((ipfw_insn_ip6 *)cmd, 1575 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1576 flags |= HAVE_DSTIP; 1577 break; 1578 1579 case O_FLOW6ID: 1580 print_flow6id( (ipfw_insn_u32 *) cmd ); 1581 flags |= HAVE_OPTIONS; 1582 break; 1583 1584 case O_IP_DSTPORT: 1585 show_prerequisites(&flags, HAVE_IP, 0); 1586 case O_IP_SRCPORT: 1587 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1588 if ((cmd->len & F_OR) && !or_block) 1589 printf(" {"); 1590 print_newports((ipfw_insn_u16 *)cmd, proto, 1591 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1592 break; 1593 1594 case O_PROTO: { 1595 struct protoent *pe = NULL; 1596 1597 if ((cmd->len & F_OR) && !or_block) 1598 printf(" {"); 1599 if (cmd->len & F_NOT) 1600 printf(" not"); 1601 proto = cmd->arg1; 1602 if (flags & HAVE_OPTIONS) 1603 printf(" proto"); 1604 if (pe) 1605 printf(" %s", pe->p_name); 1606 else 1607 printf(" %u", cmd->arg1); 1608 } 1609 flags |= HAVE_PROTO; 1610 break; 1611 1612 default: /*options ... */ 1613 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1614 if ((cmd->len & F_OR) && !or_block) 1615 printf(" {"); 1616 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1617 printf(" not"); 1618 switch(cmd->opcode) { 1619 case O_FRAG: 1620 printf(" frag"); 1621 break; 1622 1623 case O_IN: 1624 printf(cmd->len & F_NOT ? " out" : " in"); 1625 break; 1626 1627 case O_DIVERTED: 1628 switch (cmd->arg1) { 1629 case 3: 1630 printf(" diverted"); 1631 break; 1632 case 1: 1633 printf(" diverted-loopback"); 1634 break; 1635 case 2: 1636 printf(" diverted-output"); 1637 break; 1638 default: 1639 printf(" diverted-?<%u>", cmd->arg1); 1640 break; 1641 } 1642 break; 1643 1644 case O_LAYER2: 1645 printf(" layer2"); 1646 break; 1647 case O_XMIT: 1648 case O_RECV: 1649 case O_VIA: 1650 { 1651 char const *s; 1652 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1653 1654 if (cmd->opcode == O_XMIT) 1655 s = "xmit"; 1656 else if (cmd->opcode == O_RECV) 1657 s = "recv"; 1658 else /* if (cmd->opcode == O_VIA) */ 1659 s = "via"; 1660 if (cmdif->name[0] == '\0') 1661 printf(" %s %s", s, 1662 inet_ntoa(cmdif->p.ip)); 1663 else 1664 printf(" %s %s", s, cmdif->name); 1665 1666 break; 1667 } 1668 case O_IPID: 1669 if (F_LEN(cmd) == 1) 1670 printf(" ipid %u", cmd->arg1 ); 1671 else 1672 print_newports((ipfw_insn_u16 *)cmd, 0, 1673 O_IPID); 1674 break; 1675 1676 case O_IPTTL: 1677 if (F_LEN(cmd) == 1) 1678 printf(" ipttl %u", cmd->arg1 ); 1679 else 1680 print_newports((ipfw_insn_u16 *)cmd, 0, 1681 O_IPTTL); 1682 break; 1683 1684 case O_IPVER: 1685 printf(" ipver %u", cmd->arg1 ); 1686 break; 1687 1688 case O_IPPRECEDENCE: 1689 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1690 break; 1691 1692 case O_IPLEN: 1693 if (F_LEN(cmd) == 1) 1694 printf(" iplen %u", cmd->arg1 ); 1695 else 1696 print_newports((ipfw_insn_u16 *)cmd, 0, 1697 O_IPLEN); 1698 break; 1699 1700 case O_IPOPT: 1701 print_flags("ipoptions", cmd, f_ipopts); 1702 break; 1703 1704 case O_IPTOS: 1705 print_flags("iptos", cmd, f_iptos); 1706 break; 1707 1708 case O_ICMPTYPE: 1709 print_icmptypes((ipfw_insn_u32 *)cmd); 1710 break; 1711 1712 case O_ESTAB: 1713 printf(" established"); 1714 break; 1715 1716 case O_TCPDATALEN: 1717 if (F_LEN(cmd) == 1) 1718 printf(" tcpdatalen %u", cmd->arg1 ); 1719 else 1720 print_newports((ipfw_insn_u16 *)cmd, 0, 1721 O_TCPDATALEN); 1722 break; 1723 1724 case O_TCPFLAGS: 1725 print_flags("tcpflags", cmd, f_tcpflags); 1726 break; 1727 1728 case O_TCPOPTS: 1729 print_flags("tcpoptions", cmd, f_tcpopts); 1730 break; 1731 1732 case O_TCPWIN: 1733 printf(" tcpwin %d", ntohs(cmd->arg1)); 1734 break; 1735 1736 case O_TCPACK: 1737 printf(" tcpack %d", ntohl(cmd32->d[0])); 1738 break; 1739 1740 case O_TCPSEQ: 1741 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1742 break; 1743 1744 case O_UID: 1745 { 1746 struct passwd *pwd = getpwuid(cmd32->d[0]); 1747 1748 if (pwd) 1749 printf(" uid %s", pwd->pw_name); 1750 else 1751 printf(" uid %u", cmd32->d[0]); 1752 } 1753 break; 1754 1755 case O_GID: 1756 { 1757 struct group *grp = getgrgid(cmd32->d[0]); 1758 1759 if (grp) 1760 printf(" gid %s", grp->gr_name); 1761 else 1762 printf(" gid %u", cmd32->d[0]); 1763 } 1764 break; 1765 1766 case O_JAIL: 1767 printf(" jail %d", cmd32->d[0]); 1768 break; 1769 1770 case O_VERREVPATH: 1771 printf(" verrevpath"); 1772 break; 1773 1774 case O_VERSRCREACH: 1775 printf(" versrcreach"); 1776 break; 1777 1778 case O_ANTISPOOF: 1779 printf(" antispoof"); 1780 break; 1781 1782 case O_IPSEC: 1783 printf(" ipsec"); 1784 break; 1785 1786 case O_NOP: 1787 comment = (char *)(cmd + 1); 1788 break; 1789 1790 case O_KEEP_STATE: 1791 printf(" keep-state"); 1792 break; 1793 1794 case O_LIMIT: 1795 { 1796 struct _s_x *p = limit_masks; 1797 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1798 uint8_t x = c->limit_mask; 1799 char const *comma = " "; 1800 1801 printf(" limit"); 1802 for (; p->x != 0 ; p++) 1803 if ((x & p->x) == p->x) { 1804 x &= ~p->x; 1805 printf("%s%s", comma, p->s); 1806 comma = ","; 1807 } 1808 printf(" %d", c->conn_limit); 1809 } 1810 break; 1811 1812 case O_IP6: 1813 printf(" ipv6"); 1814 break; 1815 1816 case O_ICMP6TYPE: 1817 print_icmp6types((ipfw_insn_u32 *)cmd); 1818 break; 1819 1820 case O_EXT_HDR: 1821 print_ext6hdr( (ipfw_insn *) cmd ); 1822 break; 1823 1824 default: 1825 printf(" [opcode %d len %d]", 1826 cmd->opcode, cmd->len); 1827 } 1828 } 1829 if (cmd->len & F_OR) { 1830 printf(" or"); 1831 or_block = 1; 1832 } else if (or_block) { 1833 printf(" }"); 1834 or_block = 0; 1835 } 1836 } 1837 show_prerequisites(&flags, HAVE_IP, 0); 1838 if (comment) 1839 printf(" // %s", comment); 1840 printf("\n"); 1841} 1842 1843static void 1844show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1845{ 1846 struct protoent *pe; 1847 struct in_addr a; 1848 uint16_t rulenum; 1849 1850 if (!do_expired) { 1851 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1852 return; 1853 } 1854 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1855 printf("%05d", rulenum); 1856 if (pcwidth>0 || bcwidth>0) 1857 printf(" %*llu %*llu (%ds)", pcwidth, 1858 align_uint64(&d->pcnt), bcwidth, 1859 align_uint64(&d->bcnt), d->expire); 1860 switch (d->dyn_type) { 1861 case O_LIMIT_PARENT: 1862 printf(" PARENT %d", d->count); 1863 break; 1864 case O_LIMIT: 1865 printf(" LIMIT"); 1866 break; 1867 case O_KEEP_STATE: /* bidir, no mask */ 1868 printf(" STATE"); 1869 break; 1870 } 1871 1872 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1873 printf(" %s", pe->p_name); 1874 else 1875 printf(" proto %u", d->id.proto); 1876 1877 a.s_addr = htonl(d->id.src_ip); 1878 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1879 1880 a.s_addr = htonl(d->id.dst_ip); 1881 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1882 printf("\n"); 1883} 1884 1885static int 1886sort_q(const void *pa, const void *pb) 1887{ 1888 int rev = (do_sort < 0); 1889 int field = rev ? -do_sort : do_sort; 1890 long long res = 0; 1891 const struct dn_flow_queue *a = pa; 1892 const struct dn_flow_queue *b = pb; 1893 1894 switch (field) { 1895 case 1: /* pkts */ 1896 res = a->len - b->len; 1897 break; 1898 case 2: /* bytes */ 1899 res = a->len_bytes - b->len_bytes; 1900 break; 1901 1902 case 3: /* tot pkts */ 1903 res = a->tot_pkts - b->tot_pkts; 1904 break; 1905 1906 case 4: /* tot bytes */ 1907 res = a->tot_bytes - b->tot_bytes; 1908 break; 1909 } 1910 if (res < 0) 1911 res = -1; 1912 if (res > 0) 1913 res = 1; 1914 return (int)(rev ? res : -res); 1915} 1916 1917static void 1918list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1919{ 1920 int l; 1921 int index_printed, indexes = 0; 1922 char buff[255]; 1923 struct protoent *pe; 1924 1925 if (fs->rq_elements == 0) 1926 return; 1927 1928 if (do_sort != 0) 1929 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1930 1931 /* Print IPv4 flows */ 1932 index_printed = 0; 1933 for (l = 0; l < fs->rq_elements; l++) { 1934 struct in_addr ina; 1935 1936 /* XXX: Should check for IPv4 flows */ 1937 if (IS_IP6_FLOW_ID(&(q[l].id))) 1938 continue; 1939 1940 if (!index_printed) { 1941 index_printed = 1; 1942 if (indexes > 0) /* currently a no-op */ 1943 printf("\n"); 1944 indexes++; 1945 printf(" " 1946 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1947 fs->flow_mask.proto, 1948 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1949 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1950 1951 printf("BKT Prot ___Source IP/port____ " 1952 "____Dest. IP/port____ " 1953 "Tot_pkt/bytes Pkt/Byte Drp\n"); 1954 } 1955 1956 printf("%3d ", q[l].hash_slot); 1957 pe = getprotobynumber(q[l].id.proto); 1958 if (pe) 1959 printf("%-4s ", pe->p_name); 1960 else 1961 printf("%4u ", q[l].id.proto); 1962 ina.s_addr = htonl(q[l].id.src_ip); 1963 printf("%15s/%-5d ", 1964 inet_ntoa(ina), q[l].id.src_port); 1965 ina.s_addr = htonl(q[l].id.dst_ip); 1966 printf("%15s/%-5d ", 1967 inet_ntoa(ina), q[l].id.dst_port); 1968 printf("%4qu %8qu %2u %4u %3u\n", 1969 q[l].tot_pkts, q[l].tot_bytes, 1970 q[l].len, q[l].len_bytes, q[l].drops); 1971 if (verbose) 1972 printf(" S %20qd F %20qd\n", 1973 q[l].S, q[l].F); 1974 } 1975 1976 /* Print IPv6 flows */ 1977 index_printed = 0; 1978 for (l = 0; l < fs->rq_elements; l++) { 1979 if (!IS_IP6_FLOW_ID(&(q[l].id))) 1980 continue; 1981 1982 if (!index_printed) { 1983 index_printed = 1; 1984 if (indexes > 0) 1985 printf("\n"); 1986 indexes++; 1987 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ", 1988 fs->flow_mask.proto, fs->flow_mask.flow_id6); 1989 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6), 1990 buff, sizeof(buff)); 1991 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port); 1992 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6), 1993 buff, sizeof(buff) ); 1994 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port); 1995 1996 printf("BKT ___Prot___ _flow-id_ " 1997 "______________Source IPv6/port_______________ " 1998 "_______________Dest. IPv6/port_______________ " 1999 "Tot_pkt/bytes Pkt/Byte Drp\n"); 2000 } 2001 printf("%3d ", q[l].hash_slot); 2002 pe = getprotobynumber(q[l].id.proto); 2003 if (pe != NULL) 2004 printf("%9s ", pe->p_name); 2005 else 2006 printf("%9u ", q[l].id.proto); 2007 printf("%7d %39s/%-5d ", q[l].id.flow_id6, 2008 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)), 2009 q[l].id.src_port); 2010 printf(" %39s/%-5d ", 2011 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)), 2012 q[l].id.dst_port); 2013 printf(" %4qu %8qu %2u %4u %3u\n", 2014 q[l].tot_pkts, q[l].tot_bytes, 2015 q[l].len, q[l].len_bytes, q[l].drops); 2016 if (verbose) 2017 printf(" S %20qd F %20qd\n", q[l].S, q[l].F); 2018 } 2019} 2020 2021static void 2022print_flowset_parms(struct dn_flow_set *fs, char *prefix) 2023{ 2024 int l; 2025 char qs[30]; 2026 char plr[30]; 2027 char red[90]; /* Display RED parameters */ 2028 2029 l = fs->qsize; 2030 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 2031 if (l >= 8192) 2032 sprintf(qs, "%d KB", l / 1024); 2033 else 2034 sprintf(qs, "%d B", l); 2035 } else 2036 sprintf(qs, "%3d sl.", l); 2037 if (fs->plr) 2038 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 2039 else 2040 plr[0] = '\0'; 2041 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 2042 sprintf(red, 2043 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 2044 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 2045 1.0 * fs->w_q / (double)(1 << SCALE_RED), 2046 SCALE_VAL(fs->min_th), 2047 SCALE_VAL(fs->max_th), 2048 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 2049 else 2050 sprintf(red, "droptail"); 2051 2052 printf("%s %s%s %d queues (%d buckets) %s\n", 2053 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 2054} 2055 2056static void 2057list_pipes(void *data, uint nbytes, int ac, char *av[]) 2058{ 2059 int rulenum; 2060 void *next = data; 2061 struct dn_pipe *p = (struct dn_pipe *) data; 2062 struct dn_flow_set *fs; 2063 struct dn_flow_queue *q; 2064 int l; 2065 2066 if (ac > 0) 2067 rulenum = strtoul(*av++, NULL, 10); 2068 else 2069 rulenum = 0; 2070 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 2071 double b = p->bandwidth; 2072 char buf[30]; 2073 char prefix[80]; 2074 2075 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 2076 break; /* done with pipes, now queues */ 2077 2078 /* 2079 * compute length, as pipe have variable size 2080 */ 2081 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 2082 next = (char *)p + l; 2083 nbytes -= l; 2084 2085 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2) 2086 continue; 2087 2088 /* 2089 * Print rate (or clocking interface) 2090 */ 2091 if (p->if_name[0] != '\0') 2092 sprintf(buf, "%s", p->if_name); 2093 else if (b == 0) 2094 sprintf(buf, "unlimited"); 2095 else if (b >= 1000000) 2096 sprintf(buf, "%7.3f Mbit/s", b/1000000); 2097 else if (b >= 1000) 2098 sprintf(buf, "%7.3f Kbit/s", b/1000); 2099 else 2100 sprintf(buf, "%7.3f bit/s ", b); 2101 2102 sprintf(prefix, "%05d: %s %4d ms ", 2103 p->pipe_nr, buf, p->delay); 2104 print_flowset_parms(&(p->fs), prefix); 2105 if (verbose) 2106 printf(" V %20qd\n", p->V >> MY_M); 2107 2108 q = (struct dn_flow_queue *)(p+1); 2109 list_queues(&(p->fs), q); 2110 } 2111 for (fs = next; nbytes >= sizeof *fs; fs = next) { 2112 char prefix[80]; 2113 2114 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 2115 break; 2116 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 2117 next = (char *)fs + l; 2118 nbytes -= l; 2119 2120 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) || 2121 (rulenum != fs->parent_nr && do_pipe == 1))) { 2122 continue; 2123 } 2124 2125 q = (struct dn_flow_queue *)(fs+1); 2126 sprintf(prefix, "q%05d: weight %d pipe %d ", 2127 fs->fs_nr, fs->weight, fs->parent_nr); 2128 print_flowset_parms(fs, prefix); 2129 list_queues(fs, q); 2130 } 2131} 2132 2133/* 2134 * This one handles all set-related commands 2135 * ipfw set { show | enable | disable } 2136 * ipfw set swap X Y 2137 * ipfw set move X to Y 2138 * ipfw set move rule X to Y 2139 */ 2140static void 2141sets_handler(int ac, char *av[]) 2142{ 2143 uint32_t set_disable, masks[2]; 2144 int i, nbytes; 2145 uint16_t rulenum; 2146 uint8_t cmd, new_set; 2147 2148 ac--; 2149 av++; 2150 2151 if (!ac) 2152 errx(EX_USAGE, "set needs command"); 2153 if (_substrcmp(*av, "show") == 0) { 2154 void *data; 2155 char const *msg; 2156 2157 nbytes = sizeof(struct ip_fw); 2158 if ((data = calloc(1, nbytes)) == NULL) 2159 err(EX_OSERR, "calloc"); 2160 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 2161 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 2162 bcopy(&((struct ip_fw *)data)->next_rule, 2163 &set_disable, sizeof(set_disable)); 2164 2165 for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 2166 if ((set_disable & (1<<i))) { 2167 printf("%s %d", msg, i); 2168 msg = ""; 2169 } 2170 msg = (set_disable) ? " enable" : "enable"; 2171 for (i = 0; i < RESVD_SET; i++) 2172 if (!(set_disable & (1<<i))) { 2173 printf("%s %d", msg, i); 2174 msg = ""; 2175 } 2176 printf("\n"); 2177 } else if (_substrcmp(*av, "swap") == 0) { 2178 ac--; av++; 2179 if (ac != 2) 2180 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2181 rulenum = atoi(av[0]); 2182 new_set = atoi(av[1]); 2183 if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 2184 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2185 if (!isdigit(*(av[1])) || new_set > RESVD_SET) 2186 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2187 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 2188 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2189 } else if (_substrcmp(*av, "move") == 0) { 2190 ac--; av++; 2191 if (ac && _substrcmp(*av, "rule") == 0) { 2192 cmd = 2; 2193 ac--; av++; 2194 } else 2195 cmd = 3; 2196 if (ac != 3 || _substrcmp(av[1], "to") != 0) 2197 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2198 rulenum = atoi(av[0]); 2199 new_set = atoi(av[2]); 2200 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 2201 (cmd == 2 && rulenum == 65535) ) 2202 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2203 if (!isdigit(*(av[2])) || new_set > RESVD_SET) 2204 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2205 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 2206 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 2207 } else if (_substrcmp(*av, "disable") == 0 || 2208 _substrcmp(*av, "enable") == 0 ) { 2209 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2210 2211 ac--; av++; 2212 masks[0] = masks[1] = 0; 2213 2214 while (ac) { 2215 if (isdigit(**av)) { 2216 i = atoi(*av); 2217 if (i < 0 || i > RESVD_SET) 2218 errx(EX_DATAERR, 2219 "invalid set number %d\n", i); 2220 masks[which] |= (1<<i); 2221 } else if (_substrcmp(*av, "disable") == 0) 2222 which = 0; 2223 else if (_substrcmp(*av, "enable") == 0) 2224 which = 1; 2225 else 2226 errx(EX_DATAERR, 2227 "invalid set command %s\n", *av); 2228 av++; ac--; 2229 } 2230 if ( (masks[0] & masks[1]) != 0 ) 2231 errx(EX_DATAERR, 2232 "cannot enable and disable the same set\n"); 2233 2234 i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 2235 if (i) 2236 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 2237 } else 2238 errx(EX_USAGE, "invalid set command %s\n", *av); 2239} 2240 2241static void 2242sysctl_handler(int ac, char *av[], int which) 2243{ 2244 ac--; 2245 av++; 2246 2247 if (ac == 0) { 2248 warnx("missing keyword to enable/disable\n"); 2249 } else if (_substrcmp(*av, "firewall") == 0) { 2250 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2251 &which, sizeof(which)); 2252 } else if (_substrcmp(*av, "one_pass") == 0) { 2253 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2254 &which, sizeof(which)); 2255 } else if (_substrcmp(*av, "debug") == 0) { 2256 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2257 &which, sizeof(which)); 2258 } else if (_substrcmp(*av, "verbose") == 0) { 2259 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2260 &which, sizeof(which)); 2261 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2262 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2263 &which, sizeof(which)); 2264 } else if (_substrcmp(*av, "altq") == 0) { 2265 altq_set_enabled(which); 2266 } else { 2267 warnx("unrecognize enable/disable keyword: %s\n", *av); 2268 } 2269} 2270 2271static void 2272list(int ac, char *av[], int show_counters) 2273{ 2274 struct ip_fw *r; 2275 ipfw_dyn_rule *dynrules, *d; 2276 2277#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 2278 char *lim; 2279 void *data = NULL; 2280 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 2281 int exitval = EX_OK; 2282 int lac; 2283 char **lav; 2284 u_long rnum, last; 2285 char *endptr; 2286 int seen = 0; 2287 2288 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 2289 int nalloc = 1024; /* start somewhere... */ 2290 2291 last = 0; 2292 2293 if (test_only) { 2294 fprintf(stderr, "Testing only, list disabled\n"); 2295 return; 2296 } 2297 2298 ac--; 2299 av++; 2300 2301 /* get rules or pipes from kernel, resizing array as necessary */ 2302 nbytes = nalloc; 2303 2304 while (nbytes >= nalloc) { 2305 nalloc = nalloc * 2 + 200; 2306 nbytes = nalloc; 2307 if ((data = realloc(data, nbytes)) == NULL) 2308 err(EX_OSERR, "realloc"); 2309 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 2310 err(EX_OSERR, "getsockopt(IP_%s_GET)", 2311 do_pipe ? "DUMMYNET" : "FW"); 2312 } 2313 2314 if (do_pipe) { 2315 list_pipes(data, nbytes, ac, av); 2316 goto done; 2317 } 2318 2319 /* 2320 * Count static rules. They have variable size so we 2321 * need to scan the list to count them. 2322 */ 2323 for (nstat = 1, r = data, lim = (char *)data + nbytes; 2324 r->rulenum < 65535 && (char *)r < lim; 2325 ++nstat, r = NEXT(r) ) 2326 ; /* nothing */ 2327 2328 /* 2329 * Count dynamic rules. This is easier as they have 2330 * fixed size. 2331 */ 2332 r = NEXT(r); 2333 dynrules = (ipfw_dyn_rule *)r ; 2334 n = (char *)r - (char *)data; 2335 ndyn = (nbytes - n) / sizeof *dynrules; 2336 2337 /* if showing stats, figure out column widths ahead of time */ 2338 bcwidth = pcwidth = 0; 2339 if (show_counters) { 2340 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 2341 /* packet counter */ 2342 width = snprintf(NULL, 0, "%llu", 2343 align_uint64(&r->pcnt)); 2344 if (width > pcwidth) 2345 pcwidth = width; 2346 2347 /* byte counter */ 2348 width = snprintf(NULL, 0, "%llu", 2349 align_uint64(&r->bcnt)); 2350 if (width > bcwidth) 2351 bcwidth = width; 2352 } 2353 } 2354 if (do_dynamic && ndyn) { 2355 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2356 width = snprintf(NULL, 0, "%llu", 2357 align_uint64(&d->pcnt)); 2358 if (width > pcwidth) 2359 pcwidth = width; 2360 2361 width = snprintf(NULL, 0, "%llu", 2362 align_uint64(&d->bcnt)); 2363 if (width > bcwidth) 2364 bcwidth = width; 2365 } 2366 } 2367 /* if no rule numbers were specified, list all rules */ 2368 if (ac == 0) { 2369 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) ) 2370 show_ipfw(r, pcwidth, bcwidth); 2371 2372 if (do_dynamic && ndyn) { 2373 printf("## Dynamic rules (%d):\n", ndyn); 2374 for (n = 0, d = dynrules; n < ndyn; n++, d++) 2375 show_dyn_ipfw(d, pcwidth, bcwidth); 2376 } 2377 goto done; 2378 } 2379 2380 /* display specific rules requested on command line */ 2381 2382 for (lac = ac, lav = av; lac != 0; lac--) { 2383 /* convert command line rule # */ 2384 last = rnum = strtoul(*lav++, &endptr, 10); 2385 if (*endptr == '-') 2386 last = strtoul(endptr+1, &endptr, 10); 2387 if (*endptr) { 2388 exitval = EX_USAGE; 2389 warnx("invalid rule number: %s", *(lav - 1)); 2390 continue; 2391 } 2392 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 2393 if (r->rulenum > last) 2394 break; 2395 if (r->rulenum >= rnum && r->rulenum <= last) { 2396 show_ipfw(r, pcwidth, bcwidth); 2397 seen = 1; 2398 } 2399 } 2400 if (!seen) { 2401 /* give precedence to other error(s) */ 2402 if (exitval == EX_OK) 2403 exitval = EX_UNAVAILABLE; 2404 warnx("rule %lu does not exist", rnum); 2405 } 2406 } 2407 2408 if (do_dynamic && ndyn) { 2409 printf("## Dynamic rules:\n"); 2410 for (lac = ac, lav = av; lac != 0; lac--) { 2411 last = rnum = strtoul(*lav++, &endptr, 10); 2412 if (*endptr == '-') 2413 last = strtoul(endptr+1, &endptr, 10); 2414 if (*endptr) 2415 /* already warned */ 2416 continue; 2417 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 2418 uint16_t rulenum; 2419 2420 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2421 if (rulenum > rnum) 2422 break; 2423 if (r->rulenum >= rnum && r->rulenum <= last) 2424 show_dyn_ipfw(d, pcwidth, bcwidth); 2425 } 2426 } 2427 } 2428 2429 ac = 0; 2430 2431done: 2432 free(data); 2433 2434 if (exitval != EX_OK) 2435 exit(exitval); 2436#undef NEXT 2437} 2438 2439static void 2440show_usage(void) 2441{ 2442 fprintf(stderr, "usage: ipfw [options]\n" 2443"do \"ipfw -h\" or see ipfw manpage for details\n" 2444); 2445 exit(EX_USAGE); 2446} 2447 2448static void 2449help(void) 2450{ 2451 fprintf(stderr, 2452"ipfw syntax summary (but please do read the ipfw(8) manpage):\n" 2453"ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n" 2454"add [num] [set N] [prob x] RULE-BODY\n" 2455"{pipe|queue} N config PIPE-BODY\n" 2456"[pipe|queue] {zero|delete|show} [N{,N}]\n" 2457"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 2458"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 2459"\n" 2460"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 2461"ACTION: check-state | allow | count | deny | unreach CODE | skipto N |\n" 2462" {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 2463"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 2464"ADDR: [ MAC dst src ether_type ] \n" 2465" [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 2466" [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 2467"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 2468"IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 2469"IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 2470"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 2471"OPTION_LIST: OPTION [OPTION_LIST]\n" 2472"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 2473" {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 2474" {dst-port|src-port} LIST |\n" 2475" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 2476" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 2477" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 2478" icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n" 2479" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 2480" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 2481" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 2482); 2483exit(0); 2484} 2485 2486 2487static int 2488lookup_host (char *host, struct in_addr *ipaddr) 2489{ 2490 struct hostent *he; 2491 2492 if (!inet_aton(host, ipaddr)) { 2493 if ((he = gethostbyname(host)) == NULL) 2494 return(-1); 2495 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2496 } 2497 return(0); 2498} 2499 2500/* 2501 * fills the addr and mask fields in the instruction as appropriate from av. 2502 * Update length as appropriate. 2503 * The following formats are allowed: 2504 * me returns O_IP_*_ME 2505 * 1.2.3.4 single IP address 2506 * 1.2.3.4:5.6.7.8 address:mask 2507 * 1.2.3.4/24 address/mask 2508 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2509 * We can have multiple comma-separated address/mask entries. 2510 */ 2511static void 2512fill_ip(ipfw_insn_ip *cmd, char *av) 2513{ 2514 int len = 0; 2515 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2516 2517 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2518 2519 if (_substrcmp(av, "any") == 0) 2520 return; 2521 2522 if (_substrcmp(av, "me") == 0) { 2523 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2524 return; 2525 } 2526 2527 if (strncmp(av, "table(", 6) == 0) { 2528 char *p = strchr(av + 6, ','); 2529 2530 if (p) 2531 *p++ = '\0'; 2532 cmd->o.opcode = O_IP_DST_LOOKUP; 2533 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2534 if (p) { 2535 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2536 d[0] = strtoul(p, NULL, 0); 2537 } else 2538 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2539 return; 2540 } 2541 2542 while (av) { 2543 /* 2544 * After the address we can have '/' or ':' indicating a mask, 2545 * ',' indicating another address follows, '{' indicating a 2546 * set of addresses of unspecified size. 2547 */ 2548 char *p = strpbrk(av, "/:,{"); 2549 int masklen; 2550 char md; 2551 2552 if (p) { 2553 md = *p; 2554 *p++ = '\0'; 2555 } else 2556 md = '\0'; 2557 2558 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2559 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2560 switch (md) { 2561 case ':': 2562 if (!inet_aton(p, (struct in_addr *)&d[1])) 2563 errx(EX_DATAERR, "bad netmask ``%s''", p); 2564 break; 2565 case '/': 2566 masklen = atoi(p); 2567 if (masklen == 0) 2568 d[1] = htonl(0); /* mask */ 2569 else if (masklen > 32) 2570 errx(EX_DATAERR, "bad width ``%s''", p); 2571 else 2572 d[1] = htonl(~0 << (32 - masklen)); 2573 break; 2574 case '{': /* no mask, assume /24 and put back the '{' */ 2575 d[1] = htonl(~0 << (32 - 24)); 2576 *(--p) = md; 2577 break; 2578 2579 case ',': /* single address plus continuation */ 2580 *(--p) = md; 2581 /* FALLTHROUGH */ 2582 case 0: /* initialization value */ 2583 default: 2584 d[1] = htonl(~0); /* force /32 */ 2585 break; 2586 } 2587 d[0] &= d[1]; /* mask base address with mask */ 2588 /* find next separator */ 2589 if (p) 2590 p = strpbrk(p, ",{"); 2591 if (p && *p == '{') { 2592 /* 2593 * We have a set of addresses. They are stored as follows: 2594 * arg1 is the set size (powers of 2, 2..256) 2595 * addr is the base address IN HOST FORMAT 2596 * mask.. is an array of arg1 bits (rounded up to 2597 * the next multiple of 32) with bits set 2598 * for each host in the map. 2599 */ 2600 uint32_t *map = (uint32_t *)&cmd->mask; 2601 int low, high; 2602 int i = contigmask((uint8_t *)&(d[1]), 32); 2603 2604 if (len > 0) 2605 errx(EX_DATAERR, "address set cannot be in a list"); 2606 if (i < 24 || i > 31) 2607 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2608 cmd->o.arg1 = 1<<(32-i); /* map length */ 2609 d[0] = ntohl(d[0]); /* base addr in host format */ 2610 cmd->o.opcode = O_IP_DST_SET; /* default */ 2611 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2612 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2613 map[i] = 0; /* clear map */ 2614 2615 av = p + 1; 2616 low = d[0] & 0xff; 2617 high = low + cmd->o.arg1 - 1; 2618 /* 2619 * Here, i stores the previous value when we specify a range 2620 * of addresses within a mask, e.g. 45-63. i = -1 means we 2621 * have no previous value. 2622 */ 2623 i = -1; /* previous value in a range */ 2624 while (isdigit(*av)) { 2625 char *s; 2626 int a = strtol(av, &s, 0); 2627 2628 if (s == av) { /* no parameter */ 2629 if (*av != '}') 2630 errx(EX_DATAERR, "set not closed\n"); 2631 if (i != -1) 2632 errx(EX_DATAERR, "incomplete range %d-", i); 2633 break; 2634 } 2635 if (a < low || a > high) 2636 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2637 a, low, high); 2638 a -= low; 2639 if (i == -1) /* no previous in range */ 2640 i = a; 2641 else { /* check that range is valid */ 2642 if (i > a) 2643 errx(EX_DATAERR, "invalid range %d-%d", 2644 i+low, a+low); 2645 if (*s == '-') 2646 errx(EX_DATAERR, "double '-' in range"); 2647 } 2648 for (; i <= a; i++) 2649 map[i/32] |= 1<<(i & 31); 2650 i = -1; 2651 if (*s == '-') 2652 i = a; 2653 else if (*s == '}') 2654 break; 2655 av = s+1; 2656 } 2657 return; 2658 } 2659 av = p; 2660 if (av) /* then *av must be a ',' */ 2661 av++; 2662 2663 /* Check this entry */ 2664 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2665 /* 2666 * 'any' turns the entire list into a NOP. 2667 * 'not any' never matches, so it is removed from the 2668 * list unless it is the only item, in which case we 2669 * report an error. 2670 */ 2671 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2672 if (av == NULL && len == 0) /* only this entry */ 2673 errx(EX_DATAERR, "not any never matches"); 2674 } 2675 /* else do nothing and skip this entry */ 2676 return; 2677 } 2678 /* A single IP can be stored in an optimized format */ 2679 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) { 2680 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2681 return; 2682 } 2683 len += 2; /* two words... */ 2684 d += 2; 2685 } /* end while */ 2686 cmd->o.len |= len+1; 2687} 2688 2689 2690/* Try to find ipv6 address by hostname */ 2691static int 2692lookup_host6 (char *host, struct in6_addr *ip6addr) 2693{ 2694 struct hostent *he; 2695 2696 if (!inet_pton(AF_INET6, host, ip6addr)) { 2697 if ((he = gethostbyname2(host, AF_INET6)) == NULL) 2698 return(-1); 2699 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr)); 2700 } 2701 return(0); 2702} 2703 2704 2705/* n2mask sets n bits of the mask */ 2706static void 2707n2mask(struct in6_addr *mask, int n) 2708{ 2709 static int minimask[9] = 2710 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2711 u_char *p; 2712 2713 memset(mask, 0, sizeof(struct in6_addr)); 2714 p = (u_char *) mask; 2715 for (; n > 0; p++, n -= 8) { 2716 if (n >= 8) 2717 *p = 0xff; 2718 else 2719 *p = minimask[n]; 2720 } 2721 return; 2722} 2723 2724 2725/* 2726 * fill the addr and mask fields in the instruction as appropriate from av. 2727 * Update length as appropriate. 2728 * The following formats are allowed: 2729 * any matches any IP6. Actually returns an empty instruction. 2730 * me returns O_IP6_*_ME 2731 * 2732 * 03f1::234:123:0342 single IP6 addres 2733 * 03f1::234:123:0342/24 address/mask 2734 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address 2735 * 2736 * Set of address (as in ipv6) not supported because ipv6 address 2737 * are typically random past the initial prefix. 2738 * Return 1 on success, 0 on failure. 2739 */ 2740static int 2741fill_ip6(ipfw_insn_ip6 *cmd, char *av) 2742{ 2743 int len = 0; 2744 struct in6_addr *d = &(cmd->addr6); 2745 /* 2746 * Needed for multiple address. 2747 * Note d[1] points to struct in6_add r mask6 of cmd 2748 */ 2749 2750 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2751 2752 if (strcmp(av, "any") == 0) 2753 return (1); 2754 2755 2756 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/ 2757 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2758 return (1); 2759 } 2760 2761 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/ 2762 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2763 return (1); 2764 } 2765 2766 av = strdup(av); 2767 while (av) { 2768 /* 2769 * After the address we can have '/' indicating a mask, 2770 * or ',' indicating another address follows. 2771 */ 2772 2773 char *p; 2774 int masklen; 2775 char md = '\0'; 2776 2777 if ((p = strpbrk(av, "/,")) ) { 2778 md = *p; /* save the separator */ 2779 *p = '\0'; /* terminate address string */ 2780 p++; /* and skip past it */ 2781 } 2782 /* now p points to NULL, mask or next entry */ 2783 2784 /* lookup stores address in *d as a side effect */ 2785 if (lookup_host6(av, d) != 0) { 2786 /* XXX: failed. Free memory and go */ 2787 errx(EX_DATAERR, "bad address \"%s\"", av); 2788 } 2789 /* next, look at the mask, if any */ 2790 masklen = (md == '/') ? atoi(p) : 128; 2791 if (masklen > 128 || masklen < 0) 2792 errx(EX_DATAERR, "bad width \"%s\''", p); 2793 else 2794 n2mask(&d[1], masklen); 2795 2796 APPLY_MASK(d, &d[1]) /* mask base address with mask */ 2797 2798 /* find next separator */ 2799 2800 if (md == '/') { /* find separator past the mask */ 2801 p = strpbrk(p, ","); 2802 if (p != NULL) 2803 p++; 2804 } 2805 av = p; 2806 2807 /* Check this entry */ 2808 if (masklen == 0) { 2809 /* 2810 * 'any' turns the entire list into a NOP. 2811 * 'not any' never matches, so it is removed from the 2812 * list unless it is the only item, in which case we 2813 * report an error. 2814 */ 2815 if (cmd->o.len & F_NOT && av == NULL && len == 0) 2816 errx(EX_DATAERR, "not any never matches"); 2817 continue; 2818 } 2819 2820 /* 2821 * A single IP can be stored alone 2822 */ 2823 if (masklen == 128 && av == NULL && len == 0) { 2824 len = F_INSN_SIZE(struct in6_addr); 2825 break; 2826 } 2827 2828 /* Update length and pointer to arguments */ 2829 len += F_INSN_SIZE(struct in6_addr)*2; 2830 d += 2; 2831 } /* end while */ 2832 2833 /* 2834 * Total length of the command, remember that 1 is the size of 2835 * the base command. 2836 */ 2837 cmd->o.len |= len+1; 2838 free(av); 2839 return (1); 2840} 2841 2842/* 2843 * fills command for ipv6 flow-id filtering 2844 * note that the 20 bit flow number is stored in a array of u_int32_t 2845 * it's supported lists of flow-id, so in the o.arg1 we store how many 2846 * additional flow-id we want to filter, the basic is 1 2847 */ 2848void 2849fill_flow6( ipfw_insn_u32 *cmd, char *av ) 2850{ 2851 u_int32_t type; /* Current flow number */ 2852 u_int16_t nflow = 0; /* Current flow index */ 2853 char *s = av; 2854 cmd->d[0] = 0; /* Initializing the base number*/ 2855 2856 while (s) { 2857 av = strsep( &s, ",") ; 2858 type = strtoul(av, &av, 0); 2859 if (*av != ',' && *av != '\0') 2860 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2861 if (type > 0xfffff) 2862 errx(EX_DATAERR, "flow number out of range %s", av); 2863 cmd->d[nflow] |= type; 2864 nflow++; 2865 } 2866 if( nflow > 0 ) { 2867 cmd->o.opcode = O_FLOW6ID; 2868 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow; 2869 cmd->o.arg1 = nflow; 2870 } 2871 else { 2872 errx(EX_DATAERR, "invalid ipv6 flow number %s", av); 2873 } 2874} 2875 2876static ipfw_insn * 2877add_srcip6(ipfw_insn *cmd, char *av) 2878{ 2879 2880 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2881 if (F_LEN(cmd) == 0) /* any */ 2882 ; 2883 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2884 cmd->opcode = O_IP6_SRC_ME; 2885 } else if (F_LEN(cmd) == 2886 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2887 /* single IP, no mask*/ 2888 cmd->opcode = O_IP6_SRC; 2889 } else { /* addr/mask opt */ 2890 cmd->opcode = O_IP6_SRC_MASK; 2891 } 2892 return cmd; 2893} 2894 2895static ipfw_insn * 2896add_dstip6(ipfw_insn *cmd, char *av) 2897{ 2898 2899 fill_ip6((ipfw_insn_ip6 *)cmd, av); 2900 if (F_LEN(cmd) == 0) /* any */ 2901 ; 2902 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */ 2903 cmd->opcode = O_IP6_DST_ME; 2904 } else if (F_LEN(cmd) == 2905 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) { 2906 /* single IP, no mask*/ 2907 cmd->opcode = O_IP6_DST; 2908 } else { /* addr/mask opt */ 2909 cmd->opcode = O_IP6_DST_MASK; 2910 } 2911 return cmd; 2912} 2913 2914 2915/* 2916 * helper function to process a set of flags and set bits in the 2917 * appropriate masks. 2918 */ 2919static void 2920fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2921 struct _s_x *flags, char *p) 2922{ 2923 uint8_t set=0, clear=0; 2924 2925 while (p && *p) { 2926 char *q; /* points to the separator */ 2927 int val; 2928 uint8_t *which; /* mask we are working on */ 2929 2930 if (*p == '!') { 2931 p++; 2932 which = &clear; 2933 } else 2934 which = &set; 2935 q = strchr(p, ','); 2936 if (q) 2937 *q++ = '\0'; 2938 val = match_token(flags, p); 2939 if (val <= 0) 2940 errx(EX_DATAERR, "invalid flag %s", p); 2941 *which |= (uint8_t)val; 2942 p = q; 2943 } 2944 cmd->opcode = opcode; 2945 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2946 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2947} 2948 2949 2950static void 2951delete(int ac, char *av[]) 2952{ 2953 uint32_t rulenum; 2954 struct dn_pipe p; 2955 int i; 2956 int exitval = EX_OK; 2957 int do_set = 0; 2958 2959 memset(&p, 0, sizeof p); 2960 2961 av++; ac--; 2962 NEED1("missing rule specification"); 2963 if (ac > 0 && _substrcmp(*av, "set") == 0) { 2964 do_set = 1; /* delete set */ 2965 ac--; av++; 2966 } 2967 2968 /* Rule number */ 2969 while (ac && isdigit(**av)) { 2970 i = atoi(*av); av++; ac--; 2971 if (do_pipe) { 2972 if (do_pipe == 1) 2973 p.pipe_nr = i; 2974 else 2975 p.fs.fs_nr = i; 2976 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p); 2977 if (i) { 2978 exitval = 1; 2979 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2980 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr); 2981 } 2982 } else { 2983 rulenum = (i & 0xffff) | (do_set << 24); 2984 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 2985 if (i) { 2986 exitval = EX_UNAVAILABLE; 2987 warn("rule %u: setsockopt(IP_FW_DEL)", 2988 rulenum); 2989 } 2990 } 2991 } 2992 if (exitval != EX_OK) 2993 exit(exitval); 2994} 2995 2996 2997/* 2998 * fill the interface structure. We do not check the name as we can 2999 * create interfaces dynamically, so checking them at insert time 3000 * makes relatively little sense. 3001 * Interface names containing '*', '?', or '[' are assumed to be shell 3002 * patterns which match interfaces. 3003 */ 3004static void 3005fill_iface(ipfw_insn_if *cmd, char *arg) 3006{ 3007 cmd->name[0] = '\0'; 3008 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3009 3010 /* Parse the interface or address */ 3011 if (strcmp(arg, "any") == 0) 3012 cmd->o.len = 0; /* effectively ignore this command */ 3013 else if (!isdigit(*arg)) { 3014 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3015 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3016 } else if (!inet_aton(arg, &cmd->p.ip)) 3017 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3018} 3019 3020static void 3021config_pipe(int ac, char **av) 3022{ 3023 struct dn_pipe p; 3024 int i; 3025 char *end; 3026 void *par = NULL; 3027 3028 memset(&p, 0, sizeof p); 3029 3030 av++; ac--; 3031 /* Pipe number */ 3032 if (ac && isdigit(**av)) { 3033 i = atoi(*av); av++; ac--; 3034 if (do_pipe == 1) 3035 p.pipe_nr = i; 3036 else 3037 p.fs.fs_nr = i; 3038 } 3039 while (ac > 0) { 3040 double d; 3041 int tok = match_token(dummynet_params, *av); 3042 ac--; av++; 3043 3044 switch(tok) { 3045 case TOK_NOERROR: 3046 p.fs.flags_fs |= DN_NOERROR; 3047 break; 3048 3049 case TOK_PLR: 3050 NEED1("plr needs argument 0..1\n"); 3051 d = strtod(av[0], NULL); 3052 if (d > 1) 3053 d = 1; 3054 else if (d < 0) 3055 d = 0; 3056 p.fs.plr = (int)(d*0x7fffffff); 3057 ac--; av++; 3058 break; 3059 3060 case TOK_QUEUE: 3061 NEED1("queue needs queue size\n"); 3062 end = NULL; 3063 p.fs.qsize = strtoul(av[0], &end, 0); 3064 if (*end == 'K' || *end == 'k') { 3065 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3066 p.fs.qsize *= 1024; 3067 } else if (*end == 'B' || 3068 _substrcmp2(end, "by", "bytes") == 0) { 3069 p.fs.flags_fs |= DN_QSIZE_IS_BYTES; 3070 } 3071 ac--; av++; 3072 break; 3073 3074 case TOK_BUCKETS: 3075 NEED1("buckets needs argument\n"); 3076 p.fs.rq_size = strtoul(av[0], NULL, 0); 3077 ac--; av++; 3078 break; 3079 3080 case TOK_MASK: 3081 NEED1("mask needs mask specifier\n"); 3082 /* 3083 * per-flow queue, mask is dst_ip, dst_port, 3084 * src_ip, src_port, proto measured in bits 3085 */ 3086 par = NULL; 3087 3088 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask)); 3089 end = NULL; 3090 3091 while (ac >= 1) { 3092 uint32_t *p32 = NULL; 3093 uint16_t *p16 = NULL; 3094 uint32_t *p20 = NULL; 3095 struct in6_addr *pa6 = NULL; 3096 uint32_t a; 3097 3098 tok = match_token(dummynet_params, *av); 3099 ac--; av++; 3100 switch(tok) { 3101 case TOK_ALL: 3102 /* 3103 * special case, all bits significant 3104 */ 3105 p.fs.flow_mask.dst_ip = ~0; 3106 p.fs.flow_mask.src_ip = ~0; 3107 p.fs.flow_mask.dst_port = ~0; 3108 p.fs.flow_mask.src_port = ~0; 3109 p.fs.flow_mask.proto = ~0; 3110 n2mask(&(p.fs.flow_mask.dst_ip6), 128); 3111 n2mask(&(p.fs.flow_mask.src_ip6), 128); 3112 p.fs.flow_mask.flow_id6 = ~0; 3113 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3114 goto end_mask; 3115 3116 case TOK_DSTIP: 3117 p32 = &p.fs.flow_mask.dst_ip; 3118 break; 3119 3120 case TOK_SRCIP: 3121 p32 = &p.fs.flow_mask.src_ip; 3122 break; 3123 3124 case TOK_DSTIP6: 3125 pa6 = &(p.fs.flow_mask.dst_ip6); 3126 break; 3127 3128 case TOK_SRCIP6: 3129 pa6 = &(p.fs.flow_mask.src_ip6); 3130 break; 3131 3132 case TOK_FLOWID: 3133 p20 = &p.fs.flow_mask.flow_id6; 3134 break; 3135 3136 case TOK_DSTPORT: 3137 p16 = &p.fs.flow_mask.dst_port; 3138 break; 3139 3140 case TOK_SRCPORT: 3141 p16 = &p.fs.flow_mask.src_port; 3142 break; 3143 3144 case TOK_PROTO: 3145 break; 3146 3147 default: 3148 ac++; av--; /* backtrack */ 3149 goto end_mask; 3150 } 3151 if (ac < 1) 3152 errx(EX_USAGE, "mask: value missing"); 3153 if (*av[0] == '/') { 3154 a = strtoul(av[0]+1, &end, 0); 3155 if (pa6 == NULL) 3156 a = (a == 32) ? ~0 : (1 << a) - 1; 3157 } else 3158 a = strtoul(av[0], &end, 0); 3159 if (p32 != NULL) 3160 *p32 = a; 3161 else if (p16 != NULL) { 3162 if (a > 0xFFFF) 3163 errx(EX_DATAERR, 3164 "port mask must be 16 bit"); 3165 *p16 = (uint16_t)a; 3166 } else if (p20 != NULL) { 3167 if (a > 0xfffff) 3168 errx(EX_DATAERR, 3169 "flow_id mask must be 20 bit"); 3170 *p20 = (uint32_t)a; 3171 } else if (pa6 != NULL) { 3172 if (a < 0 || a > 128) 3173 errx(EX_DATAERR, 3174 "in6addr invalid mask len"); 3175 else 3176 n2mask(pa6, a); 3177 } else { 3178 if (a > 0xFF) 3179 errx(EX_DATAERR, 3180 "proto mask must be 8 bit"); 3181 p.fs.flow_mask.proto = (uint8_t)a; 3182 } 3183 if (a != 0) 3184 p.fs.flags_fs |= DN_HAVE_FLOW_MASK; 3185 ac--; av++; 3186 } /* end while, config masks */ 3187end_mask: 3188 break; 3189 3190 case TOK_RED: 3191 case TOK_GRED: 3192 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 3193 p.fs.flags_fs |= DN_IS_RED; 3194 if (tok == TOK_GRED) 3195 p.fs.flags_fs |= DN_IS_GENTLE_RED; 3196 /* 3197 * the format for parameters is w_q/min_th/max_th/max_p 3198 */ 3199 if ((end = strsep(&av[0], "/"))) { 3200 double w_q = strtod(end, NULL); 3201 if (w_q > 1 || w_q <= 0) 3202 errx(EX_DATAERR, "0 < w_q <= 1"); 3203 p.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 3204 } 3205 if ((end = strsep(&av[0], "/"))) { 3206 p.fs.min_th = strtoul(end, &end, 0); 3207 if (*end == 'K' || *end == 'k') 3208 p.fs.min_th *= 1024; 3209 } 3210 if ((end = strsep(&av[0], "/"))) { 3211 p.fs.max_th = strtoul(end, &end, 0); 3212 if (*end == 'K' || *end == 'k') 3213 p.fs.max_th *= 1024; 3214 } 3215 if ((end = strsep(&av[0], "/"))) { 3216 double max_p = strtod(end, NULL); 3217 if (max_p > 1 || max_p <= 0) 3218 errx(EX_DATAERR, "0 < max_p <= 1"); 3219 p.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 3220 } 3221 ac--; av++; 3222 break; 3223 3224 case TOK_DROPTAIL: 3225 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 3226 break; 3227 3228 case TOK_BW: 3229 NEED1("bw needs bandwidth or interface\n"); 3230 if (do_pipe != 1) 3231 errx(EX_DATAERR, "bandwidth only valid for pipes"); 3232 /* 3233 * set clocking interface or bandwidth value 3234 */ 3235 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 3236 int l = sizeof(p.if_name)-1; 3237 /* interface name */ 3238 strncpy(p.if_name, av[0], l); 3239 p.if_name[l] = '\0'; 3240 p.bandwidth = 0; 3241 } else { 3242 p.if_name[0] = '\0'; 3243 p.bandwidth = strtoul(av[0], &end, 0); 3244 if (*end == 'K' || *end == 'k') { 3245 end++; 3246 p.bandwidth *= 1000; 3247 } else if (*end == 'M') { 3248 end++; 3249 p.bandwidth *= 1000000; 3250 } 3251 if (*end == 'B' || 3252 _substrcmp2(end, "by", "bytes") == 0) 3253 p.bandwidth *= 8; 3254 if (p.bandwidth < 0) 3255 errx(EX_DATAERR, "bandwidth too large"); 3256 } 3257 ac--; av++; 3258 break; 3259 3260 case TOK_DELAY: 3261 if (do_pipe != 1) 3262 errx(EX_DATAERR, "delay only valid for pipes"); 3263 NEED1("delay needs argument 0..10000ms\n"); 3264 p.delay = strtoul(av[0], NULL, 0); 3265 ac--; av++; 3266 break; 3267 3268 case TOK_WEIGHT: 3269 if (do_pipe == 1) 3270 errx(EX_DATAERR,"weight only valid for queues"); 3271 NEED1("weight needs argument 0..100\n"); 3272 p.fs.weight = strtoul(av[0], &end, 0); 3273 ac--; av++; 3274 break; 3275 3276 case TOK_PIPE: 3277 if (do_pipe == 1) 3278 errx(EX_DATAERR,"pipe only valid for queues"); 3279 NEED1("pipe needs pipe_number\n"); 3280 p.fs.parent_nr = strtoul(av[0], &end, 0); 3281 ac--; av++; 3282 break; 3283 3284 default: 3285 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]); 3286 } 3287 } 3288 if (do_pipe == 1) { 3289 if (p.pipe_nr == 0) 3290 errx(EX_DATAERR, "pipe_nr must be > 0"); 3291 if (p.delay > 10000) 3292 errx(EX_DATAERR, "delay must be < 10000"); 3293 } else { /* do_pipe == 2, queue */ 3294 if (p.fs.parent_nr == 0) 3295 errx(EX_DATAERR, "pipe must be > 0"); 3296 if (p.fs.weight >100) 3297 errx(EX_DATAERR, "weight must be <= 100"); 3298 } 3299 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) { 3300 if (p.fs.qsize > 1024*1024) 3301 errx(EX_DATAERR, "queue size must be < 1MB"); 3302 } else { 3303 if (p.fs.qsize > 100) 3304 errx(EX_DATAERR, "2 <= queue size <= 100"); 3305 } 3306 if (p.fs.flags_fs & DN_IS_RED) { 3307 size_t len; 3308 int lookup_depth, avg_pkt_size; 3309 double s, idle, weight, w_q; 3310 struct clockinfo ck; 3311 int t; 3312 3313 if (p.fs.min_th >= p.fs.max_th) 3314 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 3315 p.fs.min_th, p.fs.max_th); 3316 if (p.fs.max_th == 0) 3317 errx(EX_DATAERR, "max_th must be > 0"); 3318 3319 len = sizeof(int); 3320 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 3321 &lookup_depth, &len, NULL, 0) == -1) 3322 3323 errx(1, "sysctlbyname(\"%s\")", 3324 "net.inet.ip.dummynet.red_lookup_depth"); 3325 if (lookup_depth == 0) 3326 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 3327 " must be greater than zero"); 3328 3329 len = sizeof(int); 3330 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 3331 &avg_pkt_size, &len, NULL, 0) == -1) 3332 3333 errx(1, "sysctlbyname(\"%s\")", 3334 "net.inet.ip.dummynet.red_avg_pkt_size"); 3335 if (avg_pkt_size == 0) 3336 errx(EX_DATAERR, 3337 "net.inet.ip.dummynet.red_avg_pkt_size must" 3338 " be greater than zero"); 3339 3340 len = sizeof(struct clockinfo); 3341 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1) 3342 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 3343 3344 /* 3345 * Ticks needed for sending a medium-sized packet. 3346 * Unfortunately, when we are configuring a WF2Q+ queue, we 3347 * do not have bandwidth information, because that is stored 3348 * in the parent pipe, and also we have multiple queues 3349 * competing for it. So we set s=0, which is not very 3350 * correct. But on the other hand, why do we want RED with 3351 * WF2Q+ ? 3352 */ 3353 if (p.bandwidth==0) /* this is a WF2Q+ queue */ 3354 s = 0; 3355 else 3356 s = ck.hz * avg_pkt_size * 8 / p.bandwidth; 3357 3358 /* 3359 * max idle time (in ticks) before avg queue size becomes 0. 3360 * NOTA: (3/w_q) is approx the value x so that 3361 * (1-w_q)^x < 10^-3. 3362 */ 3363 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED); 3364 idle = s * 3. / w_q; 3365 p.fs.lookup_step = (int)idle / lookup_depth; 3366 if (!p.fs.lookup_step) 3367 p.fs.lookup_step = 1; 3368 weight = 1 - w_q; 3369 for (t = p.fs.lookup_step; t > 0; --t) 3370 weight *= weight; 3371 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 3372 } 3373 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p); 3374 if (i) 3375 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 3376} 3377 3378static void 3379get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask) 3380{ 3381 int i, l; 3382 3383 for (i=0; i<6; i++) 3384 addr[i] = mask[i] = 0; 3385 if (strcmp(p, "any") == 0) 3386 return; 3387 3388 for (i=0; *p && i<6;i++, p++) { 3389 addr[i] = strtol(p, &p, 16); 3390 if (*p != ':') /* we start with the mask */ 3391 break; 3392 } 3393 if (*p == '/') { /* mask len */ 3394 l = strtol(p+1, &p, 0); 3395 for (i=0; l>0; l -=8, i++) 3396 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 3397 } else if (*p == '&') { /* mask */ 3398 for (i=0, p++; *p && i<6;i++, p++) { 3399 mask[i] = strtol(p, &p, 16); 3400 if (*p != ':') 3401 break; 3402 } 3403 } else if (*p == '\0') { 3404 for (i=0; i<6; i++) 3405 mask[i] = 0xff; 3406 } 3407 for (i=0; i<6; i++) 3408 addr[i] &= mask[i]; 3409} 3410 3411/* 3412 * helper function, updates the pointer to cmd with the length 3413 * of the current command, and also cleans up the first word of 3414 * the new command in case it has been clobbered before. 3415 */ 3416static ipfw_insn * 3417next_cmd(ipfw_insn *cmd) 3418{ 3419 cmd += F_LEN(cmd); 3420 bzero(cmd, sizeof(*cmd)); 3421 return cmd; 3422} 3423 3424/* 3425 * Takes arguments and copies them into a comment 3426 */ 3427static void 3428fill_comment(ipfw_insn *cmd, int ac, char **av) 3429{ 3430 int i, l; 3431 char *p = (char *)(cmd + 1); 3432 3433 cmd->opcode = O_NOP; 3434 cmd->len = (cmd->len & (F_NOT | F_OR)); 3435 3436 /* Compute length of comment string. */ 3437 for (i = 0, l = 0; i < ac; i++) 3438 l += strlen(av[i]) + 1; 3439 if (l == 0) 3440 return; 3441 if (l > 84) 3442 errx(EX_DATAERR, 3443 "comment too long (max 80 chars)"); 3444 l = 1 + (l+3)/4; 3445 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3446 for (i = 0; i < ac; i++) { 3447 strcpy(p, av[i]); 3448 p += strlen(av[i]); 3449 *p++ = ' '; 3450 } 3451 *(--p) = '\0'; 3452} 3453 3454/* 3455 * A function to fill simple commands of size 1. 3456 * Existing flags are preserved. 3457 */ 3458static void 3459fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3460{ 3461 cmd->opcode = opcode; 3462 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3463 cmd->arg1 = arg; 3464} 3465 3466/* 3467 * Fetch and add the MAC address and type, with masks. This generates one or 3468 * two microinstructions, and returns the pointer to the last one. 3469 */ 3470static ipfw_insn * 3471add_mac(ipfw_insn *cmd, int ac, char *av[]) 3472{ 3473 ipfw_insn_mac *mac; 3474 3475 if (ac < 2) 3476 errx(EX_DATAERR, "MAC dst src"); 3477 3478 cmd->opcode = O_MACADDR2; 3479 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3480 3481 mac = (ipfw_insn_mac *)cmd; 3482 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3483 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 3484 return cmd; 3485} 3486 3487static ipfw_insn * 3488add_mactype(ipfw_insn *cmd, int ac, char *av) 3489{ 3490 if (ac < 1) 3491 errx(EX_DATAERR, "missing MAC type"); 3492 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3493 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 3494 cmd->opcode = O_MAC_TYPE; 3495 return cmd; 3496 } else 3497 return NULL; 3498} 3499 3500static ipfw_insn * 3501add_proto(ipfw_insn *cmd, char *av, u_char *proto) 3502{ 3503 struct protoent *pe; 3504 3505 *proto = IPPROTO_IP; 3506 3507 if (_substrcmp(av, "all") == 0) 3508 ; /* same as "ip" */ 3509 else if ((*proto = atoi(av)) > 0) 3510 ; /* all done! */ 3511 else if ((pe = getprotobyname(av)) != NULL) 3512 *proto = pe->p_proto; 3513 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6")) 3514 *proto = IPPROTO_IPV6; 3515 else 3516 return NULL; 3517 if (*proto != IPPROTO_IP && *proto != IPPROTO_IPV6) 3518 fill_cmd(cmd, O_PROTO, 0, *proto); 3519 3520 return cmd; 3521} 3522 3523static ipfw_insn * 3524add_srcip(ipfw_insn *cmd, char *av) 3525{ 3526 fill_ip((ipfw_insn_ip *)cmd, av); 3527 if (cmd->opcode == O_IP_DST_SET) /* set */ 3528 cmd->opcode = O_IP_SRC_SET; 3529 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3530 cmd->opcode = O_IP_SRC_LOOKUP; 3531 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3532 cmd->opcode = O_IP_SRC_ME; 3533 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3534 cmd->opcode = O_IP_SRC; 3535 else /* addr/mask */ 3536 cmd->opcode = O_IP_SRC_MASK; 3537 return cmd; 3538} 3539 3540static ipfw_insn * 3541add_dstip(ipfw_insn *cmd, char *av) 3542{ 3543 fill_ip((ipfw_insn_ip *)cmd, av); 3544 if (cmd->opcode == O_IP_DST_SET) /* set */ 3545 ; 3546 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3547 ; 3548 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3549 cmd->opcode = O_IP_DST_ME; 3550 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3551 cmd->opcode = O_IP_DST; 3552 else /* addr/mask */ 3553 cmd->opcode = O_IP_DST_MASK; 3554 return cmd; 3555} 3556 3557static ipfw_insn * 3558add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 3559{ 3560 if (_substrcmp(av, "any") == 0) { 3561 return NULL; 3562 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 3563 /* XXX todo: check that we have a protocol with ports */ 3564 cmd->opcode = opcode; 3565 return cmd; 3566 } 3567 return NULL; 3568} 3569 3570static ipfw_insn * 3571add_src(ipfw_insn *cmd, char *av, u_char proto) 3572{ 3573 struct in6_addr a; 3574 3575 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3576 inet_pton(AF_INET6, av, &a)) 3577 return add_srcip6(cmd, av); 3578 /* XXX: should check for IPv4, not !IPv6 */ 3579 if (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3580 !inet_pton(AF_INET6, av, &a)) 3581 return add_srcip(cmd, av); 3582 if (strcmp(av, "any") != 0) 3583 return cmd; 3584 3585 return NULL; 3586} 3587 3588static ipfw_insn * 3589add_dst(ipfw_insn *cmd, char *av, u_char proto) 3590{ 3591 struct in6_addr a; 3592 3593 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3594 inet_pton(AF_INET6, av, &a)) 3595 return add_dstip6(cmd, av); 3596 /* XXX: should check for IPv4, not !IPv6 */ 3597 if (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3598 !inet_pton(AF_INET6, av, &a)) 3599 return add_dstip(cmd, av); 3600 if (strcmp(av, "any") != 0) 3601 return cmd; 3602 3603 return NULL; 3604} 3605 3606/* 3607 * Parse arguments and assemble the microinstructions which make up a rule. 3608 * Rules are added into the 'rulebuf' and then copied in the correct order 3609 * into the actual rule. 3610 * 3611 * The syntax for a rule starts with the action, followed by 3612 * optional action parameters, and the various match patterns. 3613 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3614 * (generated if the rule includes a keep-state option), then the 3615 * various match patterns, log/altq actions, and the actual action. 3616 * 3617 */ 3618static void 3619add(int ac, char *av[]) 3620{ 3621 /* 3622 * rules are added into the 'rulebuf' and then copied in 3623 * the correct order into the actual rule. 3624 * Some things that need to go out of order (prob, action etc.) 3625 * go into actbuf[]. 3626 */ 3627 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 3628 3629 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3630 ipfw_insn *first_cmd; /* first match pattern */ 3631 3632 struct ip_fw *rule; 3633 3634 /* 3635 * various flags used to record that we entered some fields. 3636 */ 3637 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3638 ipfw_insn *have_log = NULL, *have_altq = NULL; 3639 size_t len; 3640 3641 int i; 3642 3643 int open_par = 0; /* open parenthesis ( */ 3644 3645 /* proto is here because it is used to fetch ports */ 3646 u_char proto = IPPROTO_IP; /* default protocol */ 3647 3648 double match_prob = 1; /* match probability, default is always match */ 3649 3650 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3651 bzero(cmdbuf, sizeof(cmdbuf)); 3652 bzero(rulebuf, sizeof(rulebuf)); 3653 3654 rule = (struct ip_fw *)rulebuf; 3655 cmd = (ipfw_insn *)cmdbuf; 3656 action = (ipfw_insn *)actbuf; 3657 3658 av++; ac--; 3659 3660 /* [rule N] -- Rule number optional */ 3661 if (ac && isdigit(**av)) { 3662 rule->rulenum = atoi(*av); 3663 av++; 3664 ac--; 3665 } 3666 3667 /* [set N] -- set number (0..RESVD_SET), optional */ 3668 if (ac > 1 && _substrcmp(*av, "set") == 0) { 3669 int set = strtoul(av[1], NULL, 10); 3670 if (set < 0 || set > RESVD_SET) 3671 errx(EX_DATAERR, "illegal set %s", av[1]); 3672 rule->set = set; 3673 av += 2; ac -= 2; 3674 } 3675 3676 /* [prob D] -- match probability, optional */ 3677 if (ac > 1 && _substrcmp(*av, "prob") == 0) { 3678 match_prob = strtod(av[1], NULL); 3679 3680 if (match_prob <= 0 || match_prob > 1) 3681 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3682 av += 2; ac -= 2; 3683 } 3684 3685 /* action -- mandatory */ 3686 NEED1("missing action"); 3687 i = match_token(rule_actions, *av); 3688 ac--; av++; 3689 action->len = 1; /* default */ 3690 switch(i) { 3691 case TOK_CHECKSTATE: 3692 have_state = action; 3693 action->opcode = O_CHECK_STATE; 3694 break; 3695 3696 case TOK_ACCEPT: 3697 action->opcode = O_ACCEPT; 3698 break; 3699 3700 case TOK_DENY: 3701 action->opcode = O_DENY; 3702 action->arg1 = 0; 3703 break; 3704 3705 case TOK_REJECT: 3706 action->opcode = O_REJECT; 3707 action->arg1 = ICMP_UNREACH_HOST; 3708 break; 3709 3710 case TOK_RESET: 3711 action->opcode = O_REJECT; 3712 action->arg1 = ICMP_REJECT_RST; 3713 break; 3714 3715 case TOK_UNREACH: 3716 action->opcode = O_REJECT; 3717 NEED1("missing reject code"); 3718 fill_reject_code(&action->arg1, *av); 3719 ac--; av++; 3720 break; 3721 3722 case TOK_COUNT: 3723 action->opcode = O_COUNT; 3724 break; 3725 3726 case TOK_QUEUE: 3727 case TOK_PIPE: 3728 action->len = F_INSN_SIZE(ipfw_insn_pipe); 3729 case TOK_SKIPTO: 3730 if (i == TOK_QUEUE) 3731 action->opcode = O_QUEUE; 3732 else if (i == TOK_PIPE) 3733 action->opcode = O_PIPE; 3734 else if (i == TOK_SKIPTO) 3735 action->opcode = O_SKIPTO; 3736 NEED1("missing skipto/pipe/queue number"); 3737 action->arg1 = strtoul(*av, NULL, 10); 3738 av++; ac--; 3739 break; 3740 3741 case TOK_DIVERT: 3742 case TOK_TEE: 3743 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 3744 NEED1("missing divert/tee port"); 3745 action->arg1 = strtoul(*av, NULL, 0); 3746 if (action->arg1 == 0) { 3747 struct servent *s; 3748 setservent(1); 3749 s = getservbyname(av[0], "divert"); 3750 if (s != NULL) 3751 action->arg1 = ntohs(s->s_port); 3752 else 3753 errx(EX_DATAERR, "illegal divert/tee port"); 3754 } 3755 ac--; av++; 3756 break; 3757 3758 case TOK_NETGRAPH: 3759 case TOK_NGTEE: 3760 action->opcode = (i == TOK_NETGRAPH ) ? O_NETGRAPH : O_NGTEE; 3761 NEED1("missing netgraph cookie"); 3762 action->arg1 = strtoul(*av, NULL, 0); 3763 if (action->arg1 == 0) 3764 errx(EX_DATAERR, "illegal netgraph cookie"); 3765 ac--; av++; 3766 break; 3767 3768 case TOK_FORWARD: { 3769 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3770 char *s, *end; 3771 3772 NEED1("missing forward address[:port]"); 3773 3774 action->opcode = O_FORWARD_IP; 3775 action->len = F_INSN_SIZE(ipfw_insn_sa); 3776 3777 p->sa.sin_len = sizeof(struct sockaddr_in); 3778 p->sa.sin_family = AF_INET; 3779 p->sa.sin_port = 0; 3780 /* 3781 * locate the address-port separator (':' or ',') 3782 */ 3783 s = strchr(*av, ':'); 3784 if (s == NULL) 3785 s = strchr(*av, ','); 3786 if (s != NULL) { 3787 *(s++) = '\0'; 3788 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3789 if (s == end) 3790 errx(EX_DATAERR, 3791 "illegal forwarding port ``%s''", s); 3792 p->sa.sin_port = (u_short)i; 3793 } 3794 lookup_host(*av, &(p->sa.sin_addr)); 3795 } 3796 ac--; av++; 3797 break; 3798 3799 case TOK_COMMENT: 3800 /* pretend it is a 'count' rule followed by the comment */ 3801 action->opcode = O_COUNT; 3802 ac++; av--; /* go back... */ 3803 break; 3804 3805 default: 3806 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 3807 } 3808 action = next_cmd(action); 3809 3810 /* 3811 * [altq queuename] -- altq tag, optional 3812 * [log [logamount N]] -- log, optional 3813 * 3814 * If they exist, it go first in the cmdbuf, but then it is 3815 * skipped in the copy section to the end of the buffer. 3816 */ 3817 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) { 3818 ac--; av++; 3819 switch (i) { 3820 case TOK_LOG: 3821 { 3822 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 3823 int l; 3824 3825 if (have_log) 3826 errx(EX_DATAERR, 3827 "log cannot be specified more than once"); 3828 have_log = (ipfw_insn *)c; 3829 cmd->len = F_INSN_SIZE(ipfw_insn_log); 3830 cmd->opcode = O_LOG; 3831 if (ac && _substrcmp(*av, "logamount") == 0) { 3832 ac--; av++; 3833 NEED1("logamount requires argument"); 3834 l = atoi(*av); 3835 if (l < 0) 3836 errx(EX_DATAERR, 3837 "logamount must be positive"); 3838 c->max_log = l; 3839 ac--; av++; 3840 } else { 3841 len = sizeof(c->max_log); 3842 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 3843 &c->max_log, &len, NULL, 0) == -1) 3844 errx(1, "sysctlbyname(\"%s\")", 3845 "net.inet.ip.fw.verbose_limit"); 3846 } 3847 } 3848 break; 3849 3850 case TOK_ALTQ: 3851 { 3852 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 3853 3854 NEED1("missing altq queue name"); 3855 if (have_altq) 3856 errx(EX_DATAERR, 3857 "altq cannot be specified more than once"); 3858 have_altq = (ipfw_insn *)a; 3859 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 3860 cmd->opcode = O_ALTQ; 3861 fill_altq_qid(&a->qid, *av); 3862 ac--; av++; 3863 } 3864 break; 3865 3866 default: 3867 abort(); 3868 } 3869 cmd = next_cmd(cmd); 3870 } 3871 3872 if (have_state) /* must be a check-state, we are done */ 3873 goto done; 3874 3875#define OR_START(target) \ 3876 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 3877 if (open_par) \ 3878 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 3879 prev = NULL; \ 3880 open_par = 1; \ 3881 if ( (av[0])[1] == '\0') { \ 3882 ac--; av++; \ 3883 } else \ 3884 (*av)++; \ 3885 } \ 3886 target: \ 3887 3888 3889#define CLOSE_PAR \ 3890 if (open_par) { \ 3891 if (ac && ( \ 3892 strcmp(*av, ")") == 0 || \ 3893 strcmp(*av, "}") == 0)) { \ 3894 prev = NULL; \ 3895 open_par = 0; \ 3896 ac--; av++; \ 3897 } else \ 3898 errx(EX_USAGE, "missing \")\"\n"); \ 3899 } 3900 3901#define NOT_BLOCK \ 3902 if (ac && _substrcmp(*av, "not") == 0) { \ 3903 if (cmd->len & F_NOT) \ 3904 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 3905 cmd->len |= F_NOT; \ 3906 ac--; av++; \ 3907 } 3908 3909#define OR_BLOCK(target) \ 3910 if (ac && _substrcmp(*av, "or") == 0) { \ 3911 if (prev == NULL || open_par == 0) \ 3912 errx(EX_DATAERR, "invalid OR block"); \ 3913 prev->len |= F_OR; \ 3914 ac--; av++; \ 3915 goto target; \ 3916 } \ 3917 CLOSE_PAR; 3918 3919 first_cmd = cmd; 3920 3921#if 0 3922 /* 3923 * MAC addresses, optional. 3924 * If we have this, we skip the part "proto from src to dst" 3925 * and jump straight to the option parsing. 3926 */ 3927 NOT_BLOCK; 3928 NEED1("missing protocol"); 3929 if (_substrcmp(*av, "MAC") == 0 || 3930 _substrcmp(*av, "mac") == 0) { 3931 ac--; av++; /* the "MAC" keyword */ 3932 add_mac(cmd, ac, av); /* exits in case of errors */ 3933 cmd = next_cmd(cmd); 3934 ac -= 2; av += 2; /* dst-mac and src-mac */ 3935 NOT_BLOCK; 3936 NEED1("missing mac type"); 3937 if (add_mactype(cmd, ac, av[0])) 3938 cmd = next_cmd(cmd); 3939 ac--; av++; /* any or mac-type */ 3940 goto read_options; 3941 } 3942#endif 3943 3944 /* 3945 * protocol, mandatory 3946 */ 3947 OR_START(get_proto); 3948 NOT_BLOCK; 3949 NEED1("missing protocol"); 3950 if (add_proto(cmd, *av, &proto)) { 3951 av++; ac--; 3952 if (F_LEN(cmd) == 0) /* plain IP */ 3953 proto = 0; 3954 else { 3955 proto = cmd->arg1; 3956 prev = cmd; 3957 cmd = next_cmd(cmd); 3958 } 3959 } else if (first_cmd != cmd) { 3960 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3961 } else 3962 goto read_options; 3963 OR_BLOCK(get_proto); 3964 3965 /* 3966 * "from", mandatory 3967 */ 3968 if (!ac || _substrcmp(*av, "from") != 0) 3969 errx(EX_USAGE, "missing ``from''"); 3970 ac--; av++; 3971 3972 /* 3973 * source IP, mandatory 3974 */ 3975 OR_START(source_ip); 3976 NOT_BLOCK; /* optional "not" */ 3977 NEED1("missing source address"); 3978 if (add_src(cmd, *av, proto)) { 3979 ac--; av++; 3980 if (F_LEN(cmd) != 0) { /* ! any */ 3981 prev = cmd; 3982 cmd = next_cmd(cmd); 3983 } 3984 } else 3985 errx(EX_USAGE, "bad source address %s", *av); 3986 OR_BLOCK(source_ip); 3987 3988 /* 3989 * source ports, optional 3990 */ 3991 NOT_BLOCK; /* optional "not" */ 3992 if (ac) { 3993 if (_substrcmp(*av, "any") == 0 || 3994 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3995 ac--; av++; 3996 if (F_LEN(cmd) != 0) 3997 cmd = next_cmd(cmd); 3998 } 3999 } 4000 4001 /* 4002 * "to", mandatory 4003 */ 4004 if (!ac || _substrcmp(*av, "to") != 0) 4005 errx(EX_USAGE, "missing ``to''"); 4006 av++; ac--; 4007 4008 /* 4009 * destination, mandatory 4010 */ 4011 OR_START(dest_ip); 4012 NOT_BLOCK; /* optional "not" */ 4013 NEED1("missing dst address"); 4014 if (add_dst(cmd, *av, proto)) { 4015 ac--; av++; 4016 if (F_LEN(cmd) != 0) { /* ! any */ 4017 prev = cmd; 4018 cmd = next_cmd(cmd); 4019 } 4020 } else 4021 errx( EX_USAGE, "bad destination address %s", *av); 4022 OR_BLOCK(dest_ip); 4023 4024 /* 4025 * dest. ports, optional 4026 */ 4027 NOT_BLOCK; /* optional "not" */ 4028 if (ac) { 4029 if (_substrcmp(*av, "any") == 0 || 4030 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4031 ac--; av++; 4032 if (F_LEN(cmd) != 0) 4033 cmd = next_cmd(cmd); 4034 } 4035 } 4036 4037read_options: 4038 if (ac && first_cmd == cmd) { 4039 /* 4040 * nothing specified so far, store in the rule to ease 4041 * printout later. 4042 */ 4043 rule->_pad = 1; 4044 } 4045 prev = NULL; 4046 while (ac) { 4047 char *s; 4048 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4049 4050 s = *av; 4051 cmd32 = (ipfw_insn_u32 *)cmd; 4052 4053 if (*s == '!') { /* alternate syntax for NOT */ 4054 if (cmd->len & F_NOT) 4055 errx(EX_USAGE, "double \"not\" not allowed\n"); 4056 cmd->len = F_NOT; 4057 s++; 4058 } 4059 i = match_token(rule_options, s); 4060 ac--; av++; 4061 switch(i) { 4062 case TOK_NOT: 4063 if (cmd->len & F_NOT) 4064 errx(EX_USAGE, "double \"not\" not allowed\n"); 4065 cmd->len = F_NOT; 4066 break; 4067 4068 case TOK_OR: 4069 if (open_par == 0 || prev == NULL) 4070 errx(EX_USAGE, "invalid \"or\" block\n"); 4071 prev->len |= F_OR; 4072 break; 4073 4074 case TOK_STARTBRACE: 4075 if (open_par) 4076 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4077 open_par = 1; 4078 break; 4079 4080 case TOK_ENDBRACE: 4081 if (!open_par) 4082 errx(EX_USAGE, "+missing \")\"\n"); 4083 open_par = 0; 4084 prev = NULL; 4085 break; 4086 4087 case TOK_IN: 4088 fill_cmd(cmd, O_IN, 0, 0); 4089 break; 4090 4091 case TOK_OUT: 4092 cmd->len ^= F_NOT; /* toggle F_NOT */ 4093 fill_cmd(cmd, O_IN, 0, 0); 4094 break; 4095 4096 case TOK_DIVERTED: 4097 fill_cmd(cmd, O_DIVERTED, 0, 3); 4098 break; 4099 4100 case TOK_DIVERTEDLOOPBACK: 4101 fill_cmd(cmd, O_DIVERTED, 0, 1); 4102 break; 4103 4104 case TOK_DIVERTEDOUTPUT: 4105 fill_cmd(cmd, O_DIVERTED, 0, 2); 4106 break; 4107 4108 case TOK_FRAG: 4109 fill_cmd(cmd, O_FRAG, 0, 0); 4110 break; 4111 4112 case TOK_LAYER2: 4113 fill_cmd(cmd, O_LAYER2, 0, 0); 4114 break; 4115 4116 case TOK_XMIT: 4117 case TOK_RECV: 4118 case TOK_VIA: 4119 NEED1("recv, xmit, via require interface name" 4120 " or address"); 4121 fill_iface((ipfw_insn_if *)cmd, av[0]); 4122 ac--; av++; 4123 if (F_LEN(cmd) == 0) /* not a valid address */ 4124 break; 4125 if (i == TOK_XMIT) 4126 cmd->opcode = O_XMIT; 4127 else if (i == TOK_RECV) 4128 cmd->opcode = O_RECV; 4129 else if (i == TOK_VIA) 4130 cmd->opcode = O_VIA; 4131 break; 4132 4133 case TOK_ICMPTYPES: 4134 NEED1("icmptypes requires list of types"); 4135 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4136 av++; ac--; 4137 break; 4138 4139 case TOK_ICMP6TYPES: 4140 NEED1("icmptypes requires list of types"); 4141 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 4142 av++; ac--; 4143 break; 4144 4145 case TOK_IPTTL: 4146 NEED1("ipttl requires TTL"); 4147 if (strpbrk(*av, "-,")) { 4148 if (!add_ports(cmd, *av, 0, O_IPTTL)) 4149 errx(EX_DATAERR, "invalid ipttl %s", *av); 4150 } else 4151 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4152 ac--; av++; 4153 break; 4154 4155 case TOK_IPID: 4156 NEED1("ipid requires id"); 4157 if (strpbrk(*av, "-,")) { 4158 if (!add_ports(cmd, *av, 0, O_IPID)) 4159 errx(EX_DATAERR, "invalid ipid %s", *av); 4160 } else 4161 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4162 ac--; av++; 4163 break; 4164 4165 case TOK_IPLEN: 4166 NEED1("iplen requires length"); 4167 if (strpbrk(*av, "-,")) { 4168 if (!add_ports(cmd, *av, 0, O_IPLEN)) 4169 errx(EX_DATAERR, "invalid ip len %s", *av); 4170 } else 4171 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4172 ac--; av++; 4173 break; 4174 4175 case TOK_IPVER: 4176 NEED1("ipver requires version"); 4177 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4178 ac--; av++; 4179 break; 4180 4181 case TOK_IPPRECEDENCE: 4182 NEED1("ipprecedence requires value"); 4183 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4184 (strtoul(*av, NULL, 0) & 7) << 5); 4185 ac--; av++; 4186 break; 4187 4188 case TOK_IPOPTS: 4189 NEED1("missing argument for ipoptions"); 4190 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 4191 ac--; av++; 4192 break; 4193 4194 case TOK_IPTOS: 4195 NEED1("missing argument for iptos"); 4196 fill_flags(cmd, O_IPTOS, f_iptos, *av); 4197 ac--; av++; 4198 break; 4199 4200 case TOK_UID: 4201 NEED1("uid requires argument"); 4202 { 4203 char *end; 4204 uid_t uid; 4205 struct passwd *pwd; 4206 4207 cmd->opcode = O_UID; 4208 uid = strtoul(*av, &end, 0); 4209 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4210 if (pwd == NULL) 4211 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4212 cmd32->d[0] = pwd->pw_uid; 4213 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4214 ac--; av++; 4215 } 4216 break; 4217 4218 case TOK_GID: 4219 NEED1("gid requires argument"); 4220 { 4221 char *end; 4222 gid_t gid; 4223 struct group *grp; 4224 4225 cmd->opcode = O_GID; 4226 gid = strtoul(*av, &end, 0); 4227 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4228 if (grp == NULL) 4229 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4230 cmd32->d[0] = grp->gr_gid; 4231 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4232 ac--; av++; 4233 } 4234 break; 4235 4236 case TOK_JAIL: 4237 NEED1("jail requires argument"); 4238 { 4239 char *end; 4240 int jid; 4241 4242 cmd->opcode = O_JAIL; 4243 jid = (int)strtol(*av, &end, 0); 4244 if (jid < 0 || *end != '\0') 4245 errx(EX_DATAERR, "jail requires prison ID"); 4246 cmd32->d[0] = (uint32_t)jid; 4247 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4248 ac--; av++; 4249 } 4250 break; 4251 4252 case TOK_ESTAB: 4253 fill_cmd(cmd, O_ESTAB, 0, 0); 4254 break; 4255 4256 case TOK_SETUP: 4257 fill_cmd(cmd, O_TCPFLAGS, 0, 4258 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4259 break; 4260 4261 case TOK_TCPDATALEN: 4262 NEED1("tcpdatalen requires length"); 4263 if (strpbrk(*av, "-,")) { 4264 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 4265 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4266 } else 4267 fill_cmd(cmd, O_TCPDATALEN, 0, 4268 strtoul(*av, NULL, 0)); 4269 ac--; av++; 4270 break; 4271 4272 case TOK_TCPOPTS: 4273 NEED1("missing argument for tcpoptions"); 4274 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 4275 ac--; av++; 4276 break; 4277 4278 case TOK_TCPSEQ: 4279 case TOK_TCPACK: 4280 NEED1("tcpseq/tcpack requires argument"); 4281 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4282 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4283 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4284 ac--; av++; 4285 break; 4286 4287 case TOK_TCPWIN: 4288 NEED1("tcpwin requires length"); 4289 fill_cmd(cmd, O_TCPWIN, 0, 4290 htons(strtoul(*av, NULL, 0))); 4291 ac--; av++; 4292 break; 4293 4294 case TOK_TCPFLAGS: 4295 NEED1("missing argument for tcpflags"); 4296 cmd->opcode = O_TCPFLAGS; 4297 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 4298 ac--; av++; 4299 break; 4300 4301 case TOK_KEEPSTATE: 4302 if (open_par) 4303 errx(EX_USAGE, "keep-state cannot be part " 4304 "of an or block"); 4305 if (have_state) 4306 errx(EX_USAGE, "only one of keep-state " 4307 "and limit is allowed"); 4308 have_state = cmd; 4309 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4310 break; 4311 4312 case TOK_LIMIT: 4313 if (open_par) 4314 errx(EX_USAGE, "limit cannot be part " 4315 "of an or block"); 4316 if (have_state) 4317 errx(EX_USAGE, "only one of keep-state " 4318 "and limit is allowed"); 4319 NEED1("limit needs mask and # of connections"); 4320 have_state = cmd; 4321 { 4322 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4323 4324 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4325 cmd->opcode = O_LIMIT; 4326 c->limit_mask = 0; 4327 c->conn_limit = 0; 4328 for (; ac >1 ;) { 4329 int val; 4330 4331 val = match_token(limit_masks, *av); 4332 if (val <= 0) 4333 break; 4334 c->limit_mask |= val; 4335 ac--; av++; 4336 } 4337 c->conn_limit = atoi(*av); 4338 if (c->conn_limit == 0) 4339 errx(EX_USAGE, "limit: limit must be >0"); 4340 if (c->limit_mask == 0) 4341 errx(EX_USAGE, "missing limit mask"); 4342 ac--; av++; 4343 } 4344 break; 4345 4346 case TOK_PROTO: 4347 NEED1("missing protocol"); 4348 if (add_proto(cmd, *av, &proto)) { 4349 if (proto == IPPROTO_IPV6) 4350 fill_cmd(cmd, O_IP6, 0, 0); 4351 ac--; av++; 4352 } else 4353 errx(EX_DATAERR, "invalid protocol ``%s''", 4354 *av); 4355 break; 4356 4357 case TOK_SRCIP: 4358 NEED1("missing source IP"); 4359 if (add_srcip(cmd, *av)) { 4360 ac--; av++; 4361 } 4362 break; 4363 4364 case TOK_DSTIP: 4365 NEED1("missing destination IP"); 4366 if (add_dstip(cmd, *av)) { 4367 ac--; av++; 4368 } 4369 break; 4370 4371 case TOK_SRCIP6: 4372 NEED1("missing source IP6"); 4373 if (add_srcip6(cmd, *av)) { 4374 ac--; av++; 4375 } 4376 break; 4377 4378 case TOK_DSTIP6: 4379 NEED1("missing destination IP6"); 4380 if (add_dstip6(cmd, *av)) { 4381 ac--; av++; 4382 } 4383 break; 4384 4385 case TOK_SRCPORT: 4386 NEED1("missing source port"); 4387 if (_substrcmp(*av, "any") == 0 || 4388 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 4389 ac--; av++; 4390 } else 4391 errx(EX_DATAERR, "invalid source port %s", *av); 4392 break; 4393 4394 case TOK_DSTPORT: 4395 NEED1("missing destination port"); 4396 if (_substrcmp(*av, "any") == 0 || 4397 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 4398 ac--; av++; 4399 } else 4400 errx(EX_DATAERR, "invalid destination port %s", 4401 *av); 4402 break; 4403 4404 case TOK_MAC: 4405 if (add_mac(cmd, ac, av)) { 4406 ac -= 2; av += 2; 4407 } 4408 break; 4409 4410 case TOK_MACTYPE: 4411 NEED1("missing mac type"); 4412 if (!add_mactype(cmd, ac, *av)) 4413 errx(EX_DATAERR, "invalid mac type %s", *av); 4414 ac--; av++; 4415 break; 4416 4417 case TOK_VERREVPATH: 4418 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4419 break; 4420 4421 case TOK_VERSRCREACH: 4422 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4423 break; 4424 4425 case TOK_ANTISPOOF: 4426 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4427 break; 4428 4429 case TOK_IPSEC: 4430 fill_cmd(cmd, O_IPSEC, 0, 0); 4431 break; 4432 4433 case TOK_IPV6: 4434 fill_cmd(cmd, O_IP6, 0, 0); 4435 ac--; av++; 4436 break; 4437 4438 case TOK_EXT6HDR: 4439 fill_ext6hdr( cmd, *av ); 4440 ac--; av++; 4441 break; 4442 4443 case TOK_FLOWID: 4444 if (proto != IPPROTO_IPV6 ) 4445 errx( EX_USAGE, "flow-id filter is active " 4446 "only for ipv6 protocol\n"); 4447 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 4448 ac--; av++; 4449 break; 4450 4451 case TOK_COMMENT: 4452 fill_comment(cmd, ac, av); 4453 av += ac; 4454 ac = 0; 4455 break; 4456 4457 default: 4458 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4459 } 4460 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4461 prev = cmd; 4462 cmd = next_cmd(cmd); 4463 } 4464 } 4465 4466done: 4467 /* 4468 * Now copy stuff into the rule. 4469 * If we have a keep-state option, the first instruction 4470 * must be a PROBE_STATE (which is generated here). 4471 * If we have a LOG option, it was stored as the first command, 4472 * and now must be moved to the top of the action part. 4473 */ 4474 dst = (ipfw_insn *)rule->cmd; 4475 4476 /* 4477 * First thing to write into the command stream is the match probability. 4478 */ 4479 if (match_prob != 1) { /* 1 means always match */ 4480 dst->opcode = O_PROB; 4481 dst->len = 2; 4482 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4483 dst += dst->len; 4484 } 4485 4486 /* 4487 * generate O_PROBE_STATE if necessary 4488 */ 4489 if (have_state && have_state->opcode != O_CHECK_STATE) { 4490 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4491 dst = next_cmd(dst); 4492 } 4493 /* 4494 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ 4495 */ 4496 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4497 i = F_LEN(src); 4498 4499 switch (src->opcode) { 4500 case O_LOG: 4501 case O_KEEP_STATE: 4502 case O_LIMIT: 4503 case O_ALTQ: 4504 break; 4505 default: 4506 bcopy(src, dst, i * sizeof(uint32_t)); 4507 dst += i; 4508 } 4509 } 4510 4511 /* 4512 * put back the have_state command as last opcode 4513 */ 4514 if (have_state && have_state->opcode != O_CHECK_STATE) { 4515 i = F_LEN(have_state); 4516 bcopy(have_state, dst, i * sizeof(uint32_t)); 4517 dst += i; 4518 } 4519 /* 4520 * start action section 4521 */ 4522 rule->act_ofs = dst - rule->cmd; 4523 4524 /* 4525 * put back O_LOG, O_ALTQ if necessary 4526 */ 4527 if (have_log) { 4528 i = F_LEN(have_log); 4529 bcopy(have_log, dst, i * sizeof(uint32_t)); 4530 dst += i; 4531 } 4532 if (have_altq) { 4533 i = F_LEN(have_altq); 4534 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4535 dst += i; 4536 } 4537 /* 4538 * copy all other actions 4539 */ 4540 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4541 i = F_LEN(src); 4542 bcopy(src, dst, i * sizeof(uint32_t)); 4543 dst += i; 4544 } 4545 4546 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4547 i = (char *)dst - (char *)rule; 4548 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 4549 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 4550 if (!do_quiet) 4551 show_ipfw(rule, 0, 0); 4552} 4553 4554static void 4555zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */) 4556{ 4557 int rulenum; 4558 int failed = EX_OK; 4559 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG"; 4560 4561 av++; ac--; 4562 4563 if (!ac) { 4564 /* clear all entries */ 4565 if (do_cmd(optname, NULL, 0) < 0) 4566 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 4567 if (!do_quiet) 4568 printf("%s.\n", optname == IP_FW_ZERO ? 4569 "Accounting cleared":"Logging counts reset"); 4570 4571 return; 4572 } 4573 4574 while (ac) { 4575 /* Rule number */ 4576 if (isdigit(**av)) { 4577 rulenum = atoi(*av); 4578 av++; 4579 ac--; 4580 if (do_cmd(optname, &rulenum, sizeof rulenum)) { 4581 warn("rule %u: setsockopt(IP_FW_%s)", 4582 rulenum, name); 4583 failed = EX_UNAVAILABLE; 4584 } else if (!do_quiet) 4585 printf("Entry %d %s.\n", rulenum, 4586 optname == IP_FW_ZERO ? 4587 "cleared" : "logging count reset"); 4588 } else { 4589 errx(EX_USAGE, "invalid rule number ``%s''", *av); 4590 } 4591 } 4592 if (failed != EX_OK) 4593 exit(failed); 4594} 4595 4596static void 4597flush(int force) 4598{ 4599 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 4600 4601 if (!force && !do_quiet) { /* need to ask user */ 4602 int c; 4603 4604 printf("Are you sure? [yn] "); 4605 fflush(stdout); 4606 do { 4607 c = toupper(getc(stdin)); 4608 while (c != '\n' && getc(stdin) != '\n') 4609 if (feof(stdin)) 4610 return; /* and do not flush */ 4611 } while (c != 'Y' && c != 'N'); 4612 printf("\n"); 4613 if (c == 'N') /* user said no */ 4614 return; 4615 } 4616 if (do_cmd(cmd, NULL, 0) < 0) 4617 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 4618 do_pipe ? "DUMMYNET" : "FW"); 4619 if (!do_quiet) 4620 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 4621} 4622 4623/* 4624 * Free a the (locally allocated) copy of command line arguments. 4625 */ 4626static void 4627free_args(int ac, char **av) 4628{ 4629 int i; 4630 4631 for (i=0; i < ac; i++) 4632 free(av[i]); 4633 free(av); 4634} 4635 4636/* 4637 * This one handles all table-related commands 4638 * ipfw table N add addr[/masklen] [value] 4639 * ipfw table N delete addr[/masklen] 4640 * ipfw table N flush 4641 * ipfw table N list 4642 */ 4643static void 4644table_handler(int ac, char *av[]) 4645{ 4646 ipfw_table_entry ent; 4647 ipfw_table *tbl; 4648 int do_add; 4649 char *p; 4650 socklen_t l; 4651 uint32_t a; 4652 4653 ac--; av++; 4654 if (ac && isdigit(**av)) { 4655 ent.tbl = atoi(*av); 4656 ac--; av++; 4657 } else 4658 errx(EX_USAGE, "table number required"); 4659 NEED1("table needs command"); 4660 if (_substrcmp(*av, "add") == 0 || 4661 _substrcmp(*av, "delete") == 0) { 4662 do_add = **av == 'a'; 4663 ac--; av++; 4664 if (!ac) 4665 errx(EX_USAGE, "IP address required"); 4666 p = strchr(*av, '/'); 4667 if (p) { 4668 *p++ = '\0'; 4669 ent.masklen = atoi(p); 4670 if (ent.masklen > 32) 4671 errx(EX_DATAERR, "bad width ``%s''", p); 4672 } else 4673 ent.masklen = 32; 4674 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 4675 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 4676 ac--; av++; 4677 if (do_add && ac) 4678 ent.value = strtoul(*av, NULL, 0); 4679 else 4680 ent.value = 0; 4681 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 4682 &ent, sizeof(ent)) < 0) 4683 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 4684 do_add ? "ADD" : "DEL"); 4685 } else if (_substrcmp(*av, "flush") == 0) { 4686 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0) 4687 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 4688 } else if (_substrcmp(*av, "list") == 0) { 4689 a = ent.tbl; 4690 l = sizeof(a); 4691 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 4692 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 4693 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 4694 tbl = malloc(l); 4695 if (tbl == NULL) 4696 err(EX_OSERR, "malloc"); 4697 tbl->tbl = ent.tbl; 4698 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 4699 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 4700 for (a = 0; a < tbl->cnt; a++) { 4701 printf("%s/%u %u\n", 4702 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 4703 tbl->ent[a].masklen, tbl->ent[a].value); 4704 } 4705 } else 4706 errx(EX_USAGE, "invalid table command %s", *av); 4707} 4708 4709/* 4710 * Called with the arguments (excluding program name). 4711 * Returns 0 if successful, 1 if empty command, errx() in case of errors. 4712 */ 4713static int 4714ipfw_main(int oldac, char **oldav) 4715{ 4716 int ch, ac, save_ac; 4717 char **av, **save_av; 4718 int do_acct = 0; /* Show packet/byte count */ 4719 4720#define WHITESP " \t\f\v\n\r" 4721 if (oldac == 0) 4722 return 1; 4723 else if (oldac == 1) { 4724 /* 4725 * If we are called with a single string, try to split it into 4726 * arguments for subsequent parsing. 4727 * But first, remove spaces after a ',', by copying the string 4728 * in-place. 4729 */ 4730 char *arg = oldav[0]; /* The string... */ 4731 int l = strlen(arg); 4732 int copy = 0; /* 1 if we need to copy, 0 otherwise */ 4733 int i, j; 4734 for (i = j = 0; i < l; i++) { 4735 if (arg[i] == '#') /* comment marker */ 4736 break; 4737 if (copy) { 4738 arg[j++] = arg[i]; 4739 copy = !index("," WHITESP, arg[i]); 4740 } else { 4741 copy = !index(WHITESP, arg[i]); 4742 if (copy) 4743 arg[j++] = arg[i]; 4744 } 4745 } 4746 if (!copy && j > 0) /* last char was a 'blank', remove it */ 4747 j--; 4748 l = j; /* the new argument length */ 4749 arg[j++] = '\0'; 4750 if (l == 0) /* empty string! */ 4751 return 1; 4752 4753 /* 4754 * First, count number of arguments. Because of the previous 4755 * processing, this is just the number of blanks plus 1. 4756 */ 4757 for (i = 0, ac = 1; i < l; i++) 4758 if (index(WHITESP, arg[i]) != NULL) 4759 ac++; 4760 4761 av = calloc(ac, sizeof(char *)); 4762 4763 /* 4764 * Second, copy arguments from cmd[] to av[]. For each one, 4765 * j is the initial character, i is the one past the end. 4766 */ 4767 for (ac = 0, i = j = 0; i < l; i++) 4768 if (index(WHITESP, arg[i]) != NULL || i == l-1) { 4769 if (i == l-1) 4770 i++; 4771 av[ac] = calloc(i-j+1, 1); 4772 bcopy(arg+j, av[ac], i-j); 4773 ac++; 4774 j = i + 1; 4775 } 4776 } else { 4777 /* 4778 * If an argument ends with ',' join with the next one. 4779 */ 4780 int first, i, l; 4781 4782 av = calloc(oldac, sizeof(char *)); 4783 for (first = i = ac = 0, l = 0; i < oldac; i++) { 4784 char *arg = oldav[i]; 4785 int k = strlen(arg); 4786 4787 l += k; 4788 if (arg[k-1] != ',' || i == oldac-1) { 4789 /* Time to copy. */ 4790 av[ac] = calloc(l+1, 1); 4791 for (l=0; first <= i; first++) { 4792 strcat(av[ac]+l, oldav[first]); 4793 l += strlen(oldav[first]); 4794 } 4795 ac++; 4796 l = 0; 4797 first = i+1; 4798 } 4799 } 4800 } 4801 4802 /* Set the force flag for non-interactive processes */ 4803 if (!do_force) 4804 do_force = !isatty(STDIN_FILENO); 4805 4806 /* Save arguments for final freeing of memory. */ 4807 save_ac = ac; 4808 save_av = av; 4809 4810 optind = optreset = 0; 4811 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1) 4812 switch (ch) { 4813 case 'a': 4814 do_acct = 1; 4815 break; 4816 4817 case 'b': 4818 comment_only = 1; 4819 do_compact = 1; 4820 break; 4821 4822 case 'c': 4823 do_compact = 1; 4824 break; 4825 4826 case 'd': 4827 do_dynamic = 1; 4828 break; 4829 4830 case 'e': 4831 do_expired = 1; 4832 break; 4833 4834 case 'f': 4835 do_force = 1; 4836 break; 4837 4838 case 'h': /* help */ 4839 free_args(save_ac, save_av); 4840 help(); 4841 break; /* NOTREACHED */ 4842 4843 case 'n': 4844 test_only = 1; 4845 break; 4846 4847 case 'N': 4848 do_resolv = 1; 4849 break; 4850 4851 case 'q': 4852 do_quiet = 1; 4853 break; 4854 4855 case 's': /* sort */ 4856 do_sort = atoi(optarg); 4857 break; 4858 4859 case 'S': 4860 show_sets = 1; 4861 break; 4862 4863 case 't': 4864 do_time = 1; 4865 break; 4866 4867 case 'T': 4868 do_time = 2; /* numeric timestamp */ 4869 break; 4870 4871 case 'v': /* verbose */ 4872 verbose = 1; 4873 break; 4874 4875 default: 4876 free_args(save_ac, save_av); 4877 return 1; 4878 } 4879 4880 ac -= optind; 4881 av += optind; 4882 NEED1("bad arguments, for usage summary ``ipfw''"); 4883 4884 /* 4885 * An undocumented behaviour of ipfw1 was to allow rule numbers first, 4886 * e.g. "100 add allow ..." instead of "add 100 allow ...". 4887 * In case, swap first and second argument to get the normal form. 4888 */ 4889 if (ac > 1 && isdigit(*av[0])) { 4890 char *p = av[0]; 4891 4892 av[0] = av[1]; 4893 av[1] = p; 4894 } 4895 4896 /* 4897 * optional: pipe or queue 4898 */ 4899 do_pipe = 0; 4900 if (_substrcmp(*av, "pipe") == 0) 4901 do_pipe = 1; 4902 else if (_substrcmp(*av, "queue") == 0) 4903 do_pipe = 2; 4904 if (do_pipe) { 4905 ac--; 4906 av++; 4907 } 4908 NEED1("missing command"); 4909 4910 /* 4911 * For pipes and queues we normally say 'pipe NN config' 4912 * but the code is easier to parse as 'pipe config NN' 4913 * so we swap the two arguments. 4914 */ 4915 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) { 4916 char *p = av[0]; 4917 4918 av[0] = av[1]; 4919 av[1] = p; 4920 } 4921 4922 if (_substrcmp(*av, "add") == 0) 4923 add(ac, av); 4924 else if (do_pipe && _substrcmp(*av, "config") == 0) 4925 config_pipe(ac, av); 4926 else if (_substrcmp(*av, "delete") == 0) 4927 delete(ac, av); 4928 else if (_substrcmp(*av, "flush") == 0) 4929 flush(do_force); 4930 else if (_substrcmp(*av, "zero") == 0) 4931 zero(ac, av, IP_FW_ZERO); 4932 else if (_substrcmp(*av, "resetlog") == 0) 4933 zero(ac, av, IP_FW_RESETLOG); 4934 else if (_substrcmp(*av, "print") == 0 || 4935 _substrcmp(*av, "list") == 0) 4936 list(ac, av, do_acct); 4937 else if (_substrcmp(*av, "set") == 0) 4938 sets_handler(ac, av); 4939 else if (_substrcmp(*av, "table") == 0) 4940 table_handler(ac, av); 4941 else if (_substrcmp(*av, "enable") == 0) 4942 sysctl_handler(ac, av, 1); 4943 else if (_substrcmp(*av, "disable") == 0) 4944 sysctl_handler(ac, av, 0); 4945 else if (_substrcmp(*av, "show") == 0) 4946 list(ac, av, 1 /* show counters */); 4947 else 4948 errx(EX_USAGE, "bad command `%s'", *av); 4949 4950 /* Free memory allocated in the argument parsing. */ 4951 free_args(save_ac, save_av); 4952 return 0; 4953} 4954 4955 4956static void 4957ipfw_readfile(int ac, char *av[]) 4958{ 4959#define MAX_ARGS 32 4960 char buf[BUFSIZ]; 4961 char *cmd = NULL, *filename = av[ac-1]; 4962 int c, lineno=0; 4963 FILE *f = NULL; 4964 pid_t preproc = 0; 4965 4966 filename = av[ac-1]; 4967 4968 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 4969 switch(c) { 4970 case 'c': 4971 do_compact = 1; 4972 break; 4973 4974 case 'f': 4975 do_force = 1; 4976 break; 4977 4978 case 'N': 4979 do_resolv = 1; 4980 break; 4981 4982 case 'n': 4983 test_only = 1; 4984 break; 4985 4986 case 'p': 4987 cmd = optarg; 4988 /* 4989 * Skip previous args and delete last one, so we 4990 * pass all but the last argument to the preprocessor 4991 * via av[optind-1] 4992 */ 4993 av += optind - 1; 4994 ac -= optind - 1; 4995 av[ac-1] = NULL; 4996 fprintf(stderr, "command is %s\n", av[0]); 4997 break; 4998 4999 case 'q': 5000 do_quiet = 1; 5001 break; 5002 5003 case 'S': 5004 show_sets = 1; 5005 break; 5006 5007 default: 5008 errx(EX_USAGE, "bad arguments, for usage" 5009 " summary ``ipfw''"); 5010 } 5011 5012 if (cmd != NULL) 5013 break; 5014 } 5015 5016 if (cmd == NULL && ac != optind + 1) { 5017 fprintf(stderr, "ac %d, optind %d\n", ac, optind); 5018 errx(EX_USAGE, "extraneous filename arguments"); 5019 } 5020 5021 if ((f = fopen(filename, "r")) == NULL) 5022 err(EX_UNAVAILABLE, "fopen: %s", filename); 5023 5024 if (cmd != NULL) { /* pipe through preprocessor */ 5025 int pipedes[2]; 5026 5027 if (pipe(pipedes) == -1) 5028 err(EX_OSERR, "cannot create pipe"); 5029 5030 preproc = fork(); 5031 if (preproc == -1) 5032 err(EX_OSERR, "cannot fork"); 5033 5034 if (preproc == 0) { 5035 /* 5036 * Child, will run the preprocessor with the 5037 * file on stdin and the pipe on stdout. 5038 */ 5039 if (dup2(fileno(f), 0) == -1 5040 || dup2(pipedes[1], 1) == -1) 5041 err(EX_OSERR, "dup2()"); 5042 fclose(f); 5043 close(pipedes[1]); 5044 close(pipedes[0]); 5045 execvp(cmd, av); 5046 err(EX_OSERR, "execvp(%s) failed", cmd); 5047 } else { /* parent, will reopen f as the pipe */ 5048 fclose(f); 5049 close(pipedes[1]); 5050 if ((f = fdopen(pipedes[0], "r")) == NULL) { 5051 int savederrno = errno; 5052 5053 (void)kill(preproc, SIGTERM); 5054 errno = savederrno; 5055 err(EX_OSERR, "fdopen()"); 5056 } 5057 } 5058 } 5059 5060 while (fgets(buf, BUFSIZ, f)) { /* read commands */ 5061 char linename[10]; 5062 char *args[1]; 5063 5064 lineno++; 5065 sprintf(linename, "Line %d", lineno); 5066 setprogname(linename); /* XXX */ 5067 args[0] = buf; 5068 ipfw_main(1, args); 5069 } 5070 fclose(f); 5071 if (cmd != NULL) { 5072 int status; 5073 5074 if (waitpid(preproc, &status, 0) == -1) 5075 errx(EX_OSERR, "waitpid()"); 5076 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 5077 errx(EX_UNAVAILABLE, 5078 "preprocessor exited with status %d", 5079 WEXITSTATUS(status)); 5080 else if (WIFSIGNALED(status)) 5081 errx(EX_UNAVAILABLE, 5082 "preprocessor exited with signal %d", 5083 WTERMSIG(status)); 5084 } 5085} 5086 5087int 5088main(int ac, char *av[]) 5089{ 5090 /* 5091 * If the last argument is an absolute pathname, interpret it 5092 * as a file to be preprocessed. 5093 */ 5094 5095 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 5096 ipfw_readfile(ac, av); 5097 else { 5098 if (ipfw_main(ac-1, av+1)) 5099 show_usage(); 5100 } 5101 return EX_OK; 5102} 5103