ipfw2.c revision 112189
1/* 2 * Copyright (c) 2002 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 112189 2003-03-13 10:51:53Z maxim $ 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 31#include <ctype.h> 32#include <err.h> 33#include <errno.h> 34#include <grp.h> 35#include <limits.h> 36#include <netdb.h> 37#include <pwd.h> 38#include <signal.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <stdarg.h> 42#include <string.h> 43#include <timeconv.h> 44#include <unistd.h> 45#include <sysexits.h> 46 47#include <net/if.h> 48#include <netinet/in.h> 49#include <netinet/in_systm.h> 50#include <netinet/ip.h> 51#include <netinet/ip_icmp.h> 52#include <netinet/ip_fw.h> 53#include <net/route.h> /* def. of struct route */ 54#include <netinet/ip_dummynet.h> 55#include <netinet/tcp.h> 56#include <arpa/inet.h> 57 58int s, /* main RAW socket */ 59 do_resolv, /* Would try to resolve all */ 60 do_acct, /* Show packet/byte count */ 61 do_time, /* Show time stamps */ 62 do_quiet, /* Be quiet in add and flush */ 63 do_force, /* Don't ask for confirmation */ 64 do_pipe, /* this cmd refers to a pipe */ 65 do_sort, /* field to sort results (0 = no) */ 66 do_dynamic, /* display dynamic rules */ 67 do_expired, /* display expired dynamic rules */ 68 do_compact, /* show rules in compact mode */ 69 show_sets, /* display rule sets */ 70 verbose; 71 72#define IP_MASK_ALL 0xffffffff 73 74/* 75 * structure to hold flag names and associated values to be 76 * set in the appropriate masks. 77 * A NULL string terminates the array. 78 * Often, an element with 0 value contains an error string. 79 * 80 */ 81struct _s_x { 82 char *s; 83 int x; 84}; 85 86static struct _s_x f_tcpflags[] = { 87 { "syn", TH_SYN }, 88 { "fin", TH_FIN }, 89 { "ack", TH_ACK }, 90 { "psh", TH_PUSH }, 91 { "rst", TH_RST }, 92 { "urg", TH_URG }, 93 { "tcp flag", 0 }, 94 { NULL, 0 } 95}; 96 97static struct _s_x f_tcpopts[] = { 98 { "mss", IP_FW_TCPOPT_MSS }, 99 { "maxseg", IP_FW_TCPOPT_MSS }, 100 { "window", IP_FW_TCPOPT_WINDOW }, 101 { "sack", IP_FW_TCPOPT_SACK }, 102 { "ts", IP_FW_TCPOPT_TS }, 103 { "timestamp", IP_FW_TCPOPT_TS }, 104 { "cc", IP_FW_TCPOPT_CC }, 105 { "tcp option", 0 }, 106 { NULL, 0 } 107}; 108 109/* 110 * IP options span the range 0 to 255 so we need to remap them 111 * (though in fact only the low 5 bits are significant). 112 */ 113static struct _s_x f_ipopts[] = { 114 { "ssrr", IP_FW_IPOPT_SSRR}, 115 { "lsrr", IP_FW_IPOPT_LSRR}, 116 { "rr", IP_FW_IPOPT_RR}, 117 { "ts", IP_FW_IPOPT_TS}, 118 { "ip option", 0 }, 119 { NULL, 0 } 120}; 121 122static struct _s_x f_iptos[] = { 123 { "lowdelay", IPTOS_LOWDELAY}, 124 { "throughput", IPTOS_THROUGHPUT}, 125 { "reliability", IPTOS_RELIABILITY}, 126 { "mincost", IPTOS_MINCOST}, 127 { "congestion", IPTOS_CE}, 128 { "ecntransport", IPTOS_ECT}, 129 { "ip tos option", 0}, 130 { NULL, 0 } 131}; 132 133static struct _s_x limit_masks[] = { 134 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 135 {"src-addr", DYN_SRC_ADDR}, 136 {"src-port", DYN_SRC_PORT}, 137 {"dst-addr", DYN_DST_ADDR}, 138 {"dst-port", DYN_DST_PORT}, 139 {NULL, 0} 140}; 141 142/* 143 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 144 * This is only used in this code. 145 */ 146#define IPPROTO_ETHERTYPE 0x1000 147static struct _s_x ether_types[] = { 148 /* 149 * Note, we cannot use "-:&/" in the names because they are field 150 * separators in the type specifications. Also, we use s = NULL as 151 * end-delimiter, because a type of 0 can be legal. 152 */ 153 { "ip", 0x0800 }, 154 { "ipv4", 0x0800 }, 155 { "ipv6", 0x86dd }, 156 { "arp", 0x0806 }, 157 { "rarp", 0x8035 }, 158 { "vlan", 0x8100 }, 159 { "loop", 0x9000 }, 160 { "trail", 0x1000 }, 161 { "at", 0x809b }, 162 { "atalk", 0x809b }, 163 { "aarp", 0x80f3 }, 164 { "pppoe_disc", 0x8863 }, 165 { "pppoe_sess", 0x8864 }, 166 { "ipx_8022", 0x00E0 }, 167 { "ipx_8023", 0x0000 }, 168 { "ipx_ii", 0x8137 }, 169 { "ipx_snap", 0x8137 }, 170 { "ipx", 0x8137 }, 171 { "ns", 0x0600 }, 172 { NULL, 0 } 173}; 174 175static void show_usage(void); 176 177enum tokens { 178 TOK_NULL=0, 179 180 TOK_OR, 181 TOK_NOT, 182 TOK_STARTBRACE, 183 TOK_ENDBRACE, 184 185 TOK_ACCEPT, 186 TOK_COUNT, 187 TOK_PIPE, 188 TOK_QUEUE, 189 TOK_DIVERT, 190 TOK_TEE, 191 TOK_FORWARD, 192 TOK_SKIPTO, 193 TOK_DENY, 194 TOK_REJECT, 195 TOK_RESET, 196 TOK_UNREACH, 197 TOK_CHECKSTATE, 198 199 TOK_UID, 200 TOK_GID, 201 TOK_IN, 202 TOK_LIMIT, 203 TOK_KEEPSTATE, 204 TOK_LAYER2, 205 TOK_OUT, 206 TOK_XMIT, 207 TOK_RECV, 208 TOK_VIA, 209 TOK_FRAG, 210 TOK_IPOPTS, 211 TOK_IPLEN, 212 TOK_IPID, 213 TOK_IPPRECEDENCE, 214 TOK_IPTOS, 215 TOK_IPTTL, 216 TOK_IPVER, 217 TOK_ESTAB, 218 TOK_SETUP, 219 TOK_TCPFLAGS, 220 TOK_TCPOPTS, 221 TOK_TCPSEQ, 222 TOK_TCPACK, 223 TOK_TCPWIN, 224 TOK_ICMPTYPES, 225 TOK_MAC, 226 TOK_MACTYPE, 227 228 TOK_PLR, 229 TOK_NOERROR, 230 TOK_BUCKETS, 231 TOK_DSTIP, 232 TOK_SRCIP, 233 TOK_DSTPORT, 234 TOK_SRCPORT, 235 TOK_ALL, 236 TOK_MASK, 237 TOK_BW, 238 TOK_DELAY, 239 TOK_RED, 240 TOK_GRED, 241 TOK_DROPTAIL, 242 TOK_PROTO, 243 TOK_WEIGHT, 244}; 245 246struct _s_x dummynet_params[] = { 247 { "plr", TOK_PLR }, 248 { "noerror", TOK_NOERROR }, 249 { "buckets", TOK_BUCKETS }, 250 { "dst-ip", TOK_DSTIP }, 251 { "src-ip", TOK_SRCIP }, 252 { "dst-port", TOK_DSTPORT }, 253 { "src-port", TOK_SRCPORT }, 254 { "proto", TOK_PROTO }, 255 { "weight", TOK_WEIGHT }, 256 { "all", TOK_ALL }, 257 { "mask", TOK_MASK }, 258 { "droptail", TOK_DROPTAIL }, 259 { "red", TOK_RED }, 260 { "gred", TOK_GRED }, 261 { "bw", TOK_BW }, 262 { "bandwidth", TOK_BW }, 263 { "delay", TOK_DELAY }, 264 { "pipe", TOK_PIPE }, 265 { "queue", TOK_QUEUE }, 266 { "dummynet-params", TOK_NULL }, 267 { NULL, 0 } 268}; 269 270struct _s_x rule_actions[] = { 271 { "accept", TOK_ACCEPT }, 272 { "pass", TOK_ACCEPT }, 273 { "allow", TOK_ACCEPT }, 274 { "permit", TOK_ACCEPT }, 275 { "count", TOK_COUNT }, 276 { "pipe", TOK_PIPE }, 277 { "queue", TOK_QUEUE }, 278 { "divert", TOK_DIVERT }, 279 { "tee", TOK_TEE }, 280 { "fwd", TOK_FORWARD }, 281 { "forward", TOK_FORWARD }, 282 { "skipto", TOK_SKIPTO }, 283 { "deny", TOK_DENY }, 284 { "drop", TOK_DENY }, 285 { "reject", TOK_REJECT }, 286 { "reset", TOK_RESET }, 287 { "unreach", TOK_UNREACH }, 288 { "check-state", TOK_CHECKSTATE }, 289 { NULL, TOK_NULL }, 290 { NULL, 0 } 291}; 292 293struct _s_x rule_options[] = { 294 { "uid", TOK_UID }, 295 { "gid", TOK_GID }, 296 { "in", TOK_IN }, 297 { "limit", TOK_LIMIT }, 298 { "keep-state", TOK_KEEPSTATE }, 299 { "bridged", TOK_LAYER2 }, 300 { "layer2", TOK_LAYER2 }, 301 { "out", TOK_OUT }, 302 { "xmit", TOK_XMIT }, 303 { "recv", TOK_RECV }, 304 { "via", TOK_VIA }, 305 { "fragment", TOK_FRAG }, 306 { "frag", TOK_FRAG }, 307 { "ipoptions", TOK_IPOPTS }, 308 { "ipopts", TOK_IPOPTS }, 309 { "iplen", TOK_IPLEN }, 310 { "ipid", TOK_IPID }, 311 { "ipprecedence", TOK_IPPRECEDENCE }, 312 { "iptos", TOK_IPTOS }, 313 { "ipttl", TOK_IPTTL }, 314 { "ipversion", TOK_IPVER }, 315 { "ipver", TOK_IPVER }, 316 { "estab", TOK_ESTAB }, 317 { "established", TOK_ESTAB }, 318 { "setup", TOK_SETUP }, 319 { "tcpflags", TOK_TCPFLAGS }, 320 { "tcpflgs", TOK_TCPFLAGS }, 321 { "tcpoptions", TOK_TCPOPTS }, 322 { "tcpopts", TOK_TCPOPTS }, 323 { "tcpseq", TOK_TCPSEQ }, 324 { "tcpack", TOK_TCPACK }, 325 { "tcpwin", TOK_TCPWIN }, 326 { "icmptype", TOK_ICMPTYPES }, 327 { "icmptypes", TOK_ICMPTYPES }, 328 { "dst-ip", TOK_DSTIP }, 329 { "src-ip", TOK_SRCIP }, 330 { "dst-port", TOK_DSTPORT }, 331 { "src-port", TOK_SRCPORT }, 332 { "proto", TOK_PROTO }, 333 { "MAC", TOK_MAC }, 334 { "mac", TOK_MAC }, 335 { "mac-type", TOK_MACTYPE }, 336 337 { "not", TOK_NOT }, /* pseudo option */ 338 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 339 { "or", TOK_OR }, /* pseudo option */ 340 { "|", /* escape */ TOK_OR }, /* pseudo option */ 341 { "{", TOK_STARTBRACE }, /* pseudo option */ 342 { "(", TOK_STARTBRACE }, /* pseudo option */ 343 { "}", TOK_ENDBRACE }, /* pseudo option */ 344 { ")", TOK_ENDBRACE }, /* pseudo option */ 345 { NULL, TOK_NULL }, 346 { NULL, 0 } 347}; 348 349/** 350 * match_token takes a table and a string, returns the value associated 351 * with the string (0 meaning an error in most cases) 352 */ 353static int 354match_token(struct _s_x *table, char *string) 355{ 356 struct _s_x *pt; 357 int i = strlen(string); 358 359 for (pt = table ; i && pt->s != NULL ; pt++) 360 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 361 return pt->x; 362 return -1; 363}; 364 365static char * 366match_value(struct _s_x *p, u_int32_t value) 367{ 368 for (; p->s != NULL; p++) 369 if (p->x == value) 370 return p->s; 371 return NULL; 372} 373 374/* 375 * prints one port, symbolic or numeric 376 */ 377static void 378print_port(int proto, u_int16_t port) 379{ 380 381 if (proto == IPPROTO_ETHERTYPE) { 382 char *s; 383 384 if (do_resolv && (s = match_value(ether_types, port)) ) 385 printf("%s", s); 386 else 387 printf("0x%04x", port); 388 } else { 389 struct servent *se = NULL; 390 if (do_resolv) { 391 struct protoent *pe = getprotobynumber(proto); 392 393 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 394 } 395 if (se) 396 printf("%s", se->s_name); 397 else 398 printf("%d", port); 399 } 400} 401 402/* 403 * print the values in a list of ports 404 * XXX todo: add support for mask. 405 */ 406static void 407print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 408{ 409 u_int16_t *p = cmd->ports; 410 int i; 411 char *sep= " "; 412 413 if (cmd->o.len & F_NOT) 414 printf(" not"); 415 if (opcode != 0) 416 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 417 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 418 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 419 printf(sep); 420 print_port(proto, p[0]); 421 if (p[0] != p[1]) { 422 printf("-"); 423 print_port(proto, p[1]); 424 } 425 sep = ","; 426 } 427} 428 429/* 430 * Like strtol, but also translates service names into port numbers 431 * for some protocols. 432 * In particular: 433 * proto == -1 disables the protocol check; 434 * proto == IPPROTO_ETHERTYPE looks up an internal table 435 * proto == <some value in /etc/protocols> matches the values there. 436 * Returns *end == s in case the parameter is not found. 437 */ 438static int 439strtoport(char *s, char **end, int base, int proto) 440{ 441 char *p, *buf; 442 char *s1; 443 int i; 444 445 *end = s; /* default - not found */ 446 if ( *s == '\0') 447 return 0; /* not found */ 448 449 if (isdigit(*s)) 450 return strtol(s, end, base); 451 452 /* 453 * find separator. '\\' escapes the next char. 454 */ 455 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 456 if (*s1 == '\\' && s1[1] != '\0') 457 s1++; 458 459 buf = malloc(s1 - s + 1); 460 if (buf == NULL) 461 return 0; 462 463 /* 464 * copy into a buffer skipping backslashes 465 */ 466 for (p = s, i = 0; p != s1 ; p++) 467 if ( *p != '\\') 468 buf[i++] = *p; 469 buf[i++] = '\0'; 470 471 if (proto == IPPROTO_ETHERTYPE) { 472 i = match_token(ether_types, buf); 473 free(buf); 474 if (i != -1) { /* found */ 475 *end = s1; 476 return i; 477 } 478 } else { 479 struct protoent *pe = NULL; 480 struct servent *se; 481 482 if (proto != 0) 483 pe = getprotobynumber(proto); 484 setservent(1); 485 se = getservbyname(buf, pe ? pe->p_name : NULL); 486 free(buf); 487 if (se != NULL) { 488 *end = s1; 489 return ntohs(se->s_port); 490 } 491 } 492 return 0; /* not found */ 493} 494 495/* 496 * fill the body of the command with the list of port ranges. 497 * At the moment it only understands numeric ranges. 498 */ 499static int 500fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 501{ 502 u_int16_t *p = cmd->ports; 503 int i = 0; 504 char *s = av; 505 506 while (*s) { 507 u_int16_t a, b; 508 509 a = strtoport(av, &s, 0, proto); 510 if (s == av) /* no parameter */ 511 break; 512 if (*s == '-') { /* a range */ 513 av = s+1; 514 b = strtoport(av, &s, 0, proto); 515 if (s == av) /* no parameter */ 516 break; 517 p[0] = a; 518 p[1] = b; 519 } else if (*s == ',' || *s == '\0' ) { 520 p[0] = p[1] = a; 521 } else { /* invalid separator */ 522 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 523 *s, av); 524 } 525 i++; 526 p += 2; 527 av = s+1; 528 } 529 if (i > 0) { 530 if (i+1 > F_LEN_MASK) 531 errx(EX_DATAERR, "too many ports/ranges\n"); 532 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 533 } 534 return i; 535} 536 537static struct _s_x icmpcodes[] = { 538 { "net", ICMP_UNREACH_NET }, 539 { "host", ICMP_UNREACH_HOST }, 540 { "protocol", ICMP_UNREACH_PROTOCOL }, 541 { "port", ICMP_UNREACH_PORT }, 542 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 543 { "srcfail", ICMP_UNREACH_SRCFAIL }, 544 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 545 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 546 { "isolated", ICMP_UNREACH_ISOLATED }, 547 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 548 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 549 { "tosnet", ICMP_UNREACH_TOSNET }, 550 { "toshost", ICMP_UNREACH_TOSHOST }, 551 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 552 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 553 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 554 { NULL, 0 } 555}; 556 557static void 558fill_reject_code(u_short *codep, char *str) 559{ 560 int val; 561 char *s; 562 563 val = strtoul(str, &s, 0); 564 if (s == str || *s != '\0' || val >= 0x100) 565 val = match_token(icmpcodes, str); 566 if (val < 0) 567 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 568 *codep = val; 569 return; 570} 571 572static void 573print_reject_code(u_int16_t code) 574{ 575 char *s = match_value(icmpcodes, code); 576 577 if (s != NULL) 578 printf("unreach %s", s); 579 else 580 printf("unreach %u", code); 581} 582 583/* 584 * Returns the number of bits set (from left) in a contiguous bitmask, 585 * or -1 if the mask is not contiguous. 586 * XXX this needs a proper fix. 587 * This effectively works on masks in big-endian (network) format. 588 * when compiled on little endian architectures. 589 * 590 * First bit is bit 7 of the first byte -- note, for MAC addresses, 591 * the first bit on the wire is bit 0 of the first byte. 592 * len is the max length in bits. 593 */ 594static int 595contigmask(u_char *p, int len) 596{ 597 int i, n; 598 for (i=0; i<len ; i++) 599 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 600 break; 601 for (n=i+1; n < len; n++) 602 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 603 return -1; /* mask not contiguous */ 604 return i; 605} 606 607/* 608 * print flags set/clear in the two bitmasks passed as parameters. 609 * There is a specialized check for f_tcpflags. 610 */ 611static void 612print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 613{ 614 char *comma=""; 615 int i; 616 u_char set = cmd->arg1 & 0xff; 617 u_char clear = (cmd->arg1 >> 8) & 0xff; 618 619 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 620 printf(" setup"); 621 return; 622 } 623 624 printf(" %s ", name); 625 for (i=0; list[i].x != 0; i++) { 626 if (set & list[i].x) { 627 set &= ~list[i].x; 628 printf("%s%s", comma, list[i].s); 629 comma = ","; 630 } 631 if (clear & list[i].x) { 632 clear &= ~list[i].x; 633 printf("%s!%s", comma, list[i].s); 634 comma = ","; 635 } 636 } 637} 638 639/* 640 * Print the ip address contained in a command. 641 */ 642static void 643print_ip(ipfw_insn_ip *cmd, char *s) 644{ 645 struct hostent *he = NULL; 646 int mb; 647 648 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 649 650 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 651 printf("me"); 652 return; 653 } 654 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 655 u_int32_t x, *d; 656 int i; 657 char comma = '{'; 658 659 x = cmd->o.arg1 - 1; 660 x = htonl( ~x ); 661 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 662 printf("%s/%d", inet_ntoa(cmd->addr), 663 contigmask((u_char *)&x, 32)); 664 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 665 x &= 0xff; /* base */ 666 d = (u_int32_t *)&(cmd->mask); 667 for (i=0; i < cmd->o.arg1; i++) 668 if (d[ i/32] & (1<<(i & 31))) { 669 printf("%c%d", comma, i+x); 670 comma = ','; 671 } 672 printf("}"); 673 return; 674 } 675 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 676 mb = 32; 677 else 678 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 679 if (mb == 32 && do_resolv) 680 he = gethostbyaddr((char *)&(cmd->addr.s_addr), 681 sizeof(u_long), AF_INET); 682 if (he != NULL) /* resolved to name */ 683 printf("%s", he->h_name); 684 else if (mb == 0) /* any */ 685 printf("any"); 686 else { /* numeric IP followed by some kind of mask */ 687 printf("%s", inet_ntoa(cmd->addr)); 688 if (mb < 0) 689 printf(":%s", inet_ntoa(cmd->mask)); 690 else if (mb < 32) 691 printf("/%d", mb); 692 } 693} 694 695/* 696 * prints a MAC address/mask pair 697 */ 698static void 699print_mac(u_char *addr, u_char *mask) 700{ 701 int l = contigmask(mask, 48); 702 703 if (l == 0) 704 printf(" any"); 705 else { 706 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 707 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 708 if (l == -1) 709 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 710 mask[0], mask[1], mask[2], 711 mask[3], mask[4], mask[5]); 712 else if (l < 48) 713 printf("/%d", l); 714 } 715} 716 717static void 718fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 719{ 720 u_int8_t type; 721 722 cmd->d[0] = 0; 723 while (*av) { 724 if (*av == ',') 725 av++; 726 727 type = strtoul(av, &av, 0); 728 729 if (*av != ',' && *av != '\0') 730 errx(EX_DATAERR, "invalid ICMP type"); 731 732 if (type > 31) 733 errx(EX_DATAERR, "ICMP type out of range"); 734 735 cmd->d[0] |= 1 << type; 736 } 737 cmd->o.opcode = O_ICMPTYPE; 738 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 739} 740 741static void 742print_icmptypes(ipfw_insn_u32 *cmd) 743{ 744 int i; 745 char sep= ' '; 746 747 printf(" icmptypes"); 748 for (i = 0; i < 32; i++) { 749 if ( (cmd->d[0] & (1 << (i))) == 0) 750 continue; 751 printf("%c%d", sep, i); 752 sep = ','; 753 } 754} 755 756/* 757 * show_ipfw() prints the body of an ipfw rule. 758 * Because the standard rule has at least proto src_ip dst_ip, we use 759 * a helper function to produce these entries if not provided explicitly. 760 * The first argument is the list of fields we have, the second is 761 * the list of fields we want to be printed. 762 * 763 * Special cases if we have provided a MAC header: 764 * + if the rule does not contain IP addresses/ports, do not print them; 765 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 766 * 767 * Once we have 'have_options', IP header fields are printed as options. 768 */ 769#define HAVE_PROTO 0x0001 770#define HAVE_SRCIP 0x0002 771#define HAVE_DSTIP 0x0004 772#define HAVE_MAC 0x0008 773#define HAVE_MACTYPE 0x0010 774#define HAVE_OPTIONS 0x8000 775 776#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 777static void 778show_prerequisites(int *flags, int want, int cmd) 779{ 780 if ( (*flags & HAVE_IP) == HAVE_IP) 781 *flags |= HAVE_OPTIONS; 782 783 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 784 cmd != O_MAC_TYPE) { 785 /* 786 * mac-type was optimized out by the compiler, 787 * restore it 788 */ 789 printf(" any"); 790 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 791 return; 792 } 793 if ( !(*flags & HAVE_OPTIONS)) { 794 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 795 printf(" ip"); 796 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 797 printf(" from any"); 798 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 799 printf(" to any"); 800 } 801 *flags |= want; 802} 803 804static void 805show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 806{ 807 static int twidth = 0; 808 int l; 809 ipfw_insn *cmd; 810 int proto = 0; /* default */ 811 int flags = 0; /* prerequisites */ 812 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 813 int or_block = 0; /* we are in an or block */ 814 815 u_int32_t set_disable = rule->set_disable; 816 817 if (set_disable & (1 << rule->set)) { /* disabled */ 818 if (!show_sets) 819 return; 820 else 821 printf("# DISABLED "); 822 } 823 printf("%05u ", rule->rulenum); 824 825 if (do_acct) 826 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth, 827 rule->bcnt); 828 829 if (do_time) { 830 char timestr[30]; 831 time_t t = (time_t)0; 832 833 if (twidth == 0) { 834 strcpy(timestr, ctime(&t)); 835 *strchr(timestr, '\n') = '\0'; 836 twidth = strlen(timestr); 837 } 838 if (rule->timestamp) { 839 t = _long_to_time(rule->timestamp); 840 841 strcpy(timestr, ctime(&t)); 842 *strchr(timestr, '\n') = '\0'; 843 printf("%s ", timestr); 844 } else { 845 printf("%*s", twidth, " "); 846 } 847 } 848 849 if (show_sets) 850 printf("set %d ", rule->set); 851 852 /* 853 * print the optional "match probability" 854 */ 855 if (rule->cmd_len > 0) { 856 cmd = rule->cmd ; 857 if (cmd->opcode == O_PROB) { 858 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 859 double d = 1.0 * p->d[0]; 860 861 d = (d / 0x7fffffff); 862 printf("prob %f ", d); 863 } 864 } 865 866 /* 867 * first print actions 868 */ 869 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 870 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 871 switch(cmd->opcode) { 872 case O_CHECK_STATE: 873 printf("check-state"); 874 flags = HAVE_IP; /* avoid printing anything else */ 875 break; 876 877 case O_ACCEPT: 878 printf("allow"); 879 break; 880 881 case O_COUNT: 882 printf("count"); 883 break; 884 885 case O_DENY: 886 printf("deny"); 887 break; 888 889 case O_REJECT: 890 if (cmd->arg1 == ICMP_REJECT_RST) 891 printf("reset"); 892 else if (cmd->arg1 == ICMP_UNREACH_HOST) 893 printf("reject"); 894 else 895 print_reject_code(cmd->arg1); 896 break; 897 898 case O_SKIPTO: 899 printf("skipto %u", cmd->arg1); 900 break; 901 902 case O_PIPE: 903 printf("pipe %u", cmd->arg1); 904 break; 905 906 case O_QUEUE: 907 printf("queue %u", cmd->arg1); 908 break; 909 910 case O_DIVERT: 911 printf("divert %u", cmd->arg1); 912 break; 913 914 case O_TEE: 915 printf("tee %u", cmd->arg1); 916 break; 917 918 case O_FORWARD_IP: 919 { 920 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 921 922 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 923 if (s->sa.sin_port) 924 printf(",%d", s->sa.sin_port); 925 } 926 break; 927 928 case O_LOG: /* O_LOG is printed last */ 929 logptr = (ipfw_insn_log *)cmd; 930 break; 931 932 default: 933 printf("** unrecognized action %d len %d", 934 cmd->opcode, cmd->len); 935 } 936 } 937 if (logptr) { 938 if (logptr->max_log > 0) 939 printf(" log logamount %d", logptr->max_log); 940 else 941 printf(" log"); 942 } 943 944 /* 945 * then print the body. 946 */ 947 if (rule->_pad & 1) { /* empty rules before options */ 948 if (!do_compact) 949 printf(" ip from any to any"); 950 flags |= HAVE_IP | HAVE_OPTIONS; 951 } 952 953 for (l = rule->act_ofs, cmd = rule->cmd ; 954 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 955 /* useful alias */ 956 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 957 958 show_prerequisites(&flags, 0, cmd->opcode); 959 960 switch(cmd->opcode) { 961 case O_PROB: 962 break; /* done already */ 963 964 case O_PROBE_STATE: 965 break; /* no need to print anything here */ 966 967 case O_MACADDR2: { 968 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 969 970 if ((cmd->len & F_OR) && !or_block) 971 printf(" {"); 972 if (cmd->len & F_NOT) 973 printf(" not"); 974 printf(" MAC"); 975 flags |= HAVE_MAC; 976 print_mac( m->addr, m->mask); 977 print_mac( m->addr + 6, m->mask + 6); 978 } 979 break; 980 981 case O_MAC_TYPE: 982 if ((cmd->len & F_OR) && !or_block) 983 printf(" {"); 984 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 985 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 986 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 987 break; 988 989 case O_IP_SRC: 990 case O_IP_SRC_MASK: 991 case O_IP_SRC_ME: 992 case O_IP_SRC_SET: 993 show_prerequisites(&flags, HAVE_PROTO, 0); 994 if (!(flags & HAVE_SRCIP)) 995 printf(" from"); 996 if ((cmd->len & F_OR) && !or_block) 997 printf(" {"); 998 print_ip((ipfw_insn_ip *)cmd, 999 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1000 flags |= HAVE_SRCIP; 1001 break; 1002 1003 case O_IP_DST: 1004 case O_IP_DST_MASK: 1005 case O_IP_DST_ME: 1006 case O_IP_DST_SET: 1007 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1008 if (!(flags & HAVE_DSTIP)) 1009 printf(" to"); 1010 if ((cmd->len & F_OR) && !or_block) 1011 printf(" {"); 1012 print_ip((ipfw_insn_ip *)cmd, 1013 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1014 flags |= HAVE_DSTIP; 1015 break; 1016 1017 case O_IP_DSTPORT: 1018 show_prerequisites(&flags, HAVE_IP, 0); 1019 case O_IP_SRCPORT: 1020 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1021 if ((cmd->len & F_OR) && !or_block) 1022 printf(" {"); 1023 print_newports((ipfw_insn_u16 *)cmd, proto, 1024 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1025 break; 1026 1027 case O_PROTO: { 1028 struct protoent *pe; 1029 1030 if ((cmd->len & F_OR) && !or_block) 1031 printf(" {"); 1032 if (cmd->len & F_NOT) 1033 printf(" not"); 1034 proto = cmd->arg1; 1035 pe = getprotobynumber(cmd->arg1); 1036 if (flags & HAVE_OPTIONS) 1037 printf(" proto"); 1038 if (pe) 1039 printf(" %s", pe->p_name); 1040 else 1041 printf(" %u", cmd->arg1); 1042 } 1043 flags |= HAVE_PROTO; 1044 break; 1045 1046 default: /*options ... */ 1047 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1048 if ((cmd->len & F_OR) && !or_block) 1049 printf(" {"); 1050 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1051 printf(" not"); 1052 switch(cmd->opcode) { 1053 case O_FRAG: 1054 printf(" frag"); 1055 break; 1056 1057 case O_IN: 1058 printf(cmd->len & F_NOT ? " out" : " in"); 1059 break; 1060 1061 case O_LAYER2: 1062 printf(" layer2"); 1063 break; 1064 case O_XMIT: 1065 case O_RECV: 1066 case O_VIA: { 1067 char *s; 1068 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1069 1070 if (cmd->opcode == O_XMIT) 1071 s = "xmit"; 1072 else if (cmd->opcode == O_RECV) 1073 s = "recv"; 1074 else if (cmd->opcode == O_VIA) 1075 s = "via"; 1076 if (cmdif->name[0] == '\0') 1077 printf(" %s %s", s, 1078 inet_ntoa(cmdif->p.ip)); 1079 else if (cmdif->p.unit == -1) 1080 printf(" %s %s*", s, cmdif->name); 1081 else 1082 printf(" %s %s%d", s, cmdif->name, 1083 cmdif->p.unit); 1084 } 1085 break; 1086 1087 case O_IPID: 1088 printf(" ipid %u", cmd->arg1 ); 1089 break; 1090 1091 case O_IPTTL: 1092 printf(" ipttl %u", cmd->arg1 ); 1093 break; 1094 1095 case O_IPVER: 1096 printf(" ipver %u", cmd->arg1 ); 1097 break; 1098 1099 case O_IPPRECEDENCE: 1100 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1101 break; 1102 1103 case O_IPLEN: 1104 printf(" iplen %u", cmd->arg1 ); 1105 break; 1106 1107 case O_IPOPT: 1108 print_flags("ipoptions", cmd, f_ipopts); 1109 break; 1110 1111 case O_IPTOS: 1112 print_flags("iptos", cmd, f_iptos); 1113 break; 1114 1115 case O_ICMPTYPE: 1116 print_icmptypes((ipfw_insn_u32 *)cmd); 1117 break; 1118 1119 case O_ESTAB: 1120 printf(" established"); 1121 break; 1122 1123 case O_TCPFLAGS: 1124 print_flags("tcpflags", cmd, f_tcpflags); 1125 break; 1126 1127 case O_TCPOPTS: 1128 print_flags("tcpoptions", cmd, f_tcpopts); 1129 break; 1130 1131 case O_TCPWIN: 1132 printf(" tcpwin %d", ntohs(cmd->arg1)); 1133 break; 1134 1135 case O_TCPACK: 1136 printf(" tcpack %d", ntohl(cmd32->d[0])); 1137 break; 1138 1139 case O_TCPSEQ: 1140 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1141 break; 1142 1143 case O_UID: 1144 { 1145 struct passwd *pwd = getpwuid(cmd32->d[0]); 1146 1147 if (pwd) 1148 printf(" uid %s", pwd->pw_name); 1149 else 1150 printf(" uid %u", cmd32->d[0]); 1151 } 1152 break; 1153 1154 case O_GID: 1155 { 1156 struct group *grp = getgrgid(cmd32->d[0]); 1157 1158 if (grp) 1159 printf(" gid %s", grp->gr_name); 1160 else 1161 printf(" gid %u", cmd32->d[0]); 1162 } 1163 break; 1164 1165 case O_KEEP_STATE: 1166 printf(" keep-state"); 1167 break; 1168 1169 case O_LIMIT: 1170 { 1171 struct _s_x *p = limit_masks; 1172 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1173 u_int8_t x = c->limit_mask; 1174 char *comma = " "; 1175 1176 printf(" limit"); 1177 for ( ; p->x != 0 ; p++) 1178 if ((x & p->x) == p->x) { 1179 x &= ~p->x; 1180 printf("%s%s", comma, p->s); 1181 comma = ","; 1182 } 1183 printf(" %d", c->conn_limit); 1184 } 1185 break; 1186 1187 default: 1188 printf(" [opcode %d len %d]", 1189 cmd->opcode, cmd->len); 1190 } 1191 } 1192 if (cmd->len & F_OR) { 1193 printf(" or"); 1194 or_block = 1; 1195 } else if (or_block) { 1196 printf(" }"); 1197 or_block = 0; 1198 } 1199 } 1200 show_prerequisites(&flags, HAVE_IP, 0); 1201 1202 printf("\n"); 1203} 1204 1205static void 1206show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1207{ 1208 struct protoent *pe; 1209 struct in_addr a; 1210 1211 if (!do_expired) { 1212 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1213 return; 1214 } 1215 1216 printf("%05d %*llu %*llu (%ds)", d->rulenum, pcwidth, d->pcnt, bcwidth, 1217 d->bcnt, d->expire); 1218 switch (d->dyn_type) { 1219 case O_LIMIT_PARENT: 1220 printf(" PARENT %d", d->count); 1221 break; 1222 case O_LIMIT: 1223 printf(" LIMIT"); 1224 break; 1225 case O_KEEP_STATE: /* bidir, no mask */ 1226 printf(" STATE"); 1227 break; 1228 } 1229 1230 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1231 printf(" %s", pe->p_name); 1232 else 1233 printf(" proto %u", d->id.proto); 1234 1235 a.s_addr = htonl(d->id.src_ip); 1236 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1237 1238 a.s_addr = htonl(d->id.dst_ip); 1239 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1240 printf("\n"); 1241} 1242 1243int 1244sort_q(const void *pa, const void *pb) 1245{ 1246 int rev = (do_sort < 0); 1247 int field = rev ? -do_sort : do_sort; 1248 long long res = 0; 1249 const struct dn_flow_queue *a = pa; 1250 const struct dn_flow_queue *b = pb; 1251 1252 switch (field) { 1253 case 1: /* pkts */ 1254 res = a->len - b->len; 1255 break; 1256 case 2: /* bytes */ 1257 res = a->len_bytes - b->len_bytes; 1258 break; 1259 1260 case 3: /* tot pkts */ 1261 res = a->tot_pkts - b->tot_pkts; 1262 break; 1263 1264 case 4: /* tot bytes */ 1265 res = a->tot_bytes - b->tot_bytes; 1266 break; 1267 } 1268 if (res < 0) 1269 res = -1; 1270 if (res > 0) 1271 res = 1; 1272 return (int)(rev ? res : -res); 1273} 1274 1275static void 1276list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1277{ 1278 int l; 1279 1280 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1281 fs->flow_mask.proto, 1282 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1283 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1284 if (fs->rq_elements == 0) 1285 return; 1286 1287 printf("BKT Prot ___Source IP/port____ " 1288 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1289 if (do_sort != 0) 1290 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1291 for (l = 0; l < fs->rq_elements; l++) { 1292 struct in_addr ina; 1293 struct protoent *pe; 1294 1295 ina.s_addr = htonl(q[l].id.src_ip); 1296 printf("%3d ", q[l].hash_slot); 1297 pe = getprotobynumber(q[l].id.proto); 1298 if (pe) 1299 printf("%-4s ", pe->p_name); 1300 else 1301 printf("%4u ", q[l].id.proto); 1302 printf("%15s/%-5d ", 1303 inet_ntoa(ina), q[l].id.src_port); 1304 ina.s_addr = htonl(q[l].id.dst_ip); 1305 printf("%15s/%-5d ", 1306 inet_ntoa(ina), q[l].id.dst_port); 1307 printf("%4qu %8qu %2u %4u %3u\n", 1308 q[l].tot_pkts, q[l].tot_bytes, 1309 q[l].len, q[l].len_bytes, q[l].drops); 1310 if (verbose) 1311 printf(" S %20qd F %20qd\n", 1312 q[l].S, q[l].F); 1313 } 1314} 1315 1316static void 1317print_flowset_parms(struct dn_flow_set *fs, char *prefix) 1318{ 1319 int l; 1320 char qs[30]; 1321 char plr[30]; 1322 char red[90]; /* Display RED parameters */ 1323 1324 l = fs->qsize; 1325 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1326 if (l >= 8192) 1327 sprintf(qs, "%d KB", l / 1024); 1328 else 1329 sprintf(qs, "%d B", l); 1330 } else 1331 sprintf(qs, "%3d sl.", l); 1332 if (fs->plr) 1333 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1334 else 1335 plr[0] = '\0'; 1336 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1337 sprintf(red, 1338 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1339 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1340 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1341 SCALE_VAL(fs->min_th), 1342 SCALE_VAL(fs->max_th), 1343 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1344 else 1345 sprintf(red, "droptail"); 1346 1347 printf("%s %s%s %d queues (%d buckets) %s\n", 1348 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1349} 1350 1351static void 1352list_pipes(void *data, int nbytes, int ac, char *av[]) 1353{ 1354 u_long rulenum; 1355 void *next = data; 1356 struct dn_pipe *p = (struct dn_pipe *) data; 1357 struct dn_flow_set *fs; 1358 struct dn_flow_queue *q; 1359 int l; 1360 1361 if (ac > 0) 1362 rulenum = strtoul(*av++, NULL, 10); 1363 else 1364 rulenum = 0; 1365 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 1366 double b = p->bandwidth; 1367 char buf[30]; 1368 char prefix[80]; 1369 1370 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 1371 break; /* done with pipes, now queues */ 1372 1373 /* 1374 * compute length, as pipe have variable size 1375 */ 1376 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1377 next = (void *)p + l; 1378 nbytes -= l; 1379 1380 if (rulenum != 0 && rulenum != p->pipe_nr) 1381 continue; 1382 1383 /* 1384 * Print rate (or clocking interface) 1385 */ 1386 if (p->if_name[0] != '\0') 1387 sprintf(buf, "%s", p->if_name); 1388 else if (b == 0) 1389 sprintf(buf, "unlimited"); 1390 else if (b >= 1000000) 1391 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1392 else if (b >= 1000) 1393 sprintf(buf, "%7.3f Kbit/s", b/1000); 1394 else 1395 sprintf(buf, "%7.3f bit/s ", b); 1396 1397 sprintf(prefix, "%05d: %s %4d ms ", 1398 p->pipe_nr, buf, p->delay); 1399 print_flowset_parms(&(p->fs), prefix); 1400 if (verbose) 1401 printf(" V %20qd\n", p->V >> MY_M); 1402 1403 q = (struct dn_flow_queue *)(p+1); 1404 list_queues(&(p->fs), q); 1405 } 1406 for (fs = next; nbytes >= sizeof *fs; fs = next) { 1407 char prefix[80]; 1408 1409 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 1410 break; 1411 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1412 next = (void *)fs + l; 1413 nbytes -= l; 1414 q = (struct dn_flow_queue *)(fs+1); 1415 sprintf(prefix, "q%05d: weight %d pipe %d ", 1416 fs->fs_nr, fs->weight, fs->parent_nr); 1417 print_flowset_parms(fs, prefix); 1418 list_queues(fs, q); 1419 } 1420} 1421 1422/* 1423 * This one handles all set-related commands 1424 * ipfw set { show | enable | disable } 1425 * ipfw set swap X Y 1426 * ipfw set move X to Y 1427 * ipfw set move rule X to Y 1428 */ 1429static void 1430sets_handler(int ac, char *av[]) 1431{ 1432 u_int32_t set_disable, masks[2]; 1433 int i, nbytes; 1434 u_int16_t rulenum; 1435 u_int8_t cmd, new_set; 1436 1437 ac--; 1438 av++; 1439 1440 if (!ac) 1441 errx(EX_USAGE, "set needs command"); 1442 if (!strncmp(*av, "show", strlen(*av)) ) { 1443 void *data; 1444 char *msg; 1445 1446 nbytes = sizeof(struct ip_fw); 1447 if ((data = malloc(nbytes)) == NULL) 1448 err(EX_OSERR, "malloc"); 1449 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1450 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1451 set_disable = ((struct ip_fw *)data)->set_disable; 1452 1453 for (i = 0, msg = "disable" ; i < 31; i++) 1454 if ( (set_disable & (1<<i))) { 1455 printf("%s %d", msg, i); 1456 msg = ""; 1457 } 1458 msg = (set_disable) ? " enable" : "enable"; 1459 for (i = 0; i < 31; i++) 1460 if ( !(set_disable & (1<<i))) { 1461 printf("%s %d", msg, i); 1462 msg = ""; 1463 } 1464 printf("\n"); 1465 } else if (!strncmp(*av, "swap", strlen(*av))) { 1466 ac--; av++; 1467 if (ac != 2) 1468 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1469 rulenum = atoi(av[0]); 1470 new_set = atoi(av[1]); 1471 if (!isdigit(*(av[0])) || rulenum > 30) 1472 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1473 if (!isdigit(*(av[1])) || new_set > 30) 1474 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1475 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1476 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1477 masks, sizeof(u_int32_t)); 1478 } else if (!strncmp(*av, "move", strlen(*av))) { 1479 ac--; av++; 1480 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1481 cmd = 2; 1482 ac--; av++; 1483 } else 1484 cmd = 3; 1485 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1486 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1487 rulenum = atoi(av[0]); 1488 new_set = atoi(av[2]); 1489 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1490 (cmd == 2 && rulenum == 65535) ) 1491 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1492 if (!isdigit(*(av[2])) || new_set > 30) 1493 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1494 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1495 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1496 masks, sizeof(u_int32_t)); 1497 } else if (!strncmp(*av, "disable", strlen(*av)) || 1498 !strncmp(*av, "enable", strlen(*av)) ) { 1499 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1500 1501 ac--; av++; 1502 masks[0] = masks[1] = 0; 1503 1504 while (ac) { 1505 if (isdigit(**av)) { 1506 i = atoi(*av); 1507 if (i < 0 || i > 30) 1508 errx(EX_DATAERR, 1509 "invalid set number %d\n", i); 1510 masks[which] |= (1<<i); 1511 } else if (!strncmp(*av, "disable", strlen(*av))) 1512 which = 0; 1513 else if (!strncmp(*av, "enable", strlen(*av))) 1514 which = 1; 1515 else 1516 errx(EX_DATAERR, 1517 "invalid set command %s\n", *av); 1518 av++; ac--; 1519 } 1520 if ( (masks[0] & masks[1]) != 0 ) 1521 errx(EX_DATAERR, 1522 "cannot enable and disable the same set\n"); 1523 1524 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1525 if (i) 1526 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1527 } else 1528 errx(EX_USAGE, "invalid set command %s\n", *av); 1529} 1530 1531static void 1532sysctl_handler(int ac, char *av[], int which) 1533{ 1534 ac--; 1535 av++; 1536 1537 if (*av == NULL) { 1538 warnx("missing keyword to enable/disable\n"); 1539 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1540 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, &which, sizeof(which)); 1541 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1542 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, &which, sizeof(which)); 1543 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1544 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, &which, sizeof(which)); 1545 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1546 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, &which, sizeof(which)); 1547 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1548 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, &which, sizeof(which)); 1549 } else { 1550 warnx("unrecognize enable/disable keyword: %s\n", *av); 1551 } 1552} 1553 1554static void 1555list(int ac, char *av[]) 1556{ 1557 struct ip_fw *r; 1558 ipfw_dyn_rule *dynrules, *d; 1559 1560 void *lim, *data = NULL; 1561 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1562 int exitval = EX_OK; 1563 int lac; 1564 char **lav; 1565 u_long rnum; 1566 char *endptr; 1567 int seen = 0; 1568 1569 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1570 int nalloc = 1024; /* start somewhere... */ 1571 1572 ac--; 1573 av++; 1574 1575 /* get rules or pipes from kernel, resizing array as necessary */ 1576 nbytes = nalloc; 1577 1578 while (nbytes >= nalloc) { 1579 nalloc = nalloc * 2 + 200; 1580 nbytes = nalloc; 1581 if ((data = realloc(data, nbytes)) == NULL) 1582 err(EX_OSERR, "realloc"); 1583 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1584 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1585 do_pipe ? "DUMMYNET" : "FW"); 1586 } 1587 1588 if (do_pipe) { 1589 list_pipes(data, nbytes, ac, av); 1590 goto done; 1591 } 1592 1593 /* 1594 * Count static rules. They have variable size so we 1595 * need to scan the list to count them. 1596 */ 1597 for (nstat = 1, r = data, lim = data + nbytes; 1598 r->rulenum < 65535 && (void *)r < lim; 1599 ++nstat, r = (void *)r + RULESIZE(r) ) 1600 ; /* nothing */ 1601 1602 /* 1603 * Count dynamic rules. This is easier as they have 1604 * fixed size. 1605 */ 1606 r = (void *)r + RULESIZE(r); 1607 dynrules = (ipfw_dyn_rule *)r ; 1608 n = (void *)r - data; 1609 ndyn = (nbytes - n) / sizeof *dynrules; 1610 1611 /* if showing stats, figure out column widths ahead of time */ 1612 bcwidth = pcwidth = 0; 1613 if (do_acct) { 1614 for (n = 0, r = data; n < nstat; 1615 n++, r = (void *)r + RULESIZE(r)) { 1616 /* packet counter */ 1617 width = snprintf(NULL, 0, "%llu", r->pcnt); 1618 if (width > pcwidth) 1619 pcwidth = width; 1620 1621 /* byte counter */ 1622 width = snprintf(NULL, 0, "%llu", r->bcnt); 1623 if (width > bcwidth) 1624 bcwidth = width; 1625 } 1626 } 1627 if (do_dynamic && ndyn) { 1628 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1629 width = snprintf(NULL, 0, "%llu", d->pcnt); 1630 if (width > pcwidth) 1631 pcwidth = width; 1632 1633 width = snprintf(NULL, 0, "%llu", d->bcnt); 1634 if (width > bcwidth) 1635 bcwidth = width; 1636 } 1637 } 1638 /* if no rule numbers were specified, list all rules */ 1639 if (ac == 0) { 1640 for (n = 0, r = data; n < nstat; 1641 n++, r = (void *)r + RULESIZE(r) ) 1642 show_ipfw(r, pcwidth, bcwidth); 1643 1644 if (do_dynamic && ndyn) { 1645 printf("## Dynamic rules (%d):\n", ndyn); 1646 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1647 show_dyn_ipfw(d, pcwidth, bcwidth); 1648 } 1649 goto done; 1650 } 1651 1652 /* display specific rules requested on command line */ 1653 1654 for (lac = ac, lav = av; lac != 0; lac--) { 1655 /* convert command line rule # */ 1656 rnum = strtoul(*lav++, &endptr, 10); 1657 if (*endptr) { 1658 exitval = EX_USAGE; 1659 warnx("invalid rule number: %s", *(lav - 1)); 1660 continue; 1661 } 1662 for (n = seen = 0, r = data; n < nstat; 1663 n++, r = (void *)r + RULESIZE(r) ) { 1664 if (r->rulenum > rnum) 1665 break; 1666 if (r->rulenum == rnum) { 1667 show_ipfw(r, pcwidth, bcwidth); 1668 seen = 1; 1669 } 1670 } 1671 if (!seen) { 1672 /* give precedence to other error(s) */ 1673 if (exitval == EX_OK) 1674 exitval = EX_UNAVAILABLE; 1675 warnx("rule %lu does not exist", rnum); 1676 } 1677 } 1678 1679 if (do_dynamic && ndyn) { 1680 printf("## Dynamic rules:\n"); 1681 for (lac = ac, lav = av; lac != 0; lac--) { 1682 rnum = strtoul(*lav++, &endptr, 10); 1683 if (*endptr) 1684 /* already warned */ 1685 continue; 1686 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1687 if (d->rulenum > rnum) 1688 break; 1689 if (d->rulenum == rnum) 1690 show_dyn_ipfw(d, pcwidth, bcwidth); 1691 } 1692 } 1693 } 1694 1695 ac = 0; 1696 1697done: 1698 free(data); 1699 1700 if (exitval != EX_OK) 1701 exit(exitval); 1702} 1703 1704static void 1705show_usage(void) 1706{ 1707 fprintf(stderr, "usage: ipfw [options]\n" 1708" add [number] rule\n" 1709" pipe number config [pipeconfig]\n" 1710" queue number config [queueconfig]\n" 1711" [pipe] flush\n" 1712" [pipe] delete number ...\n" 1713" [pipe] {list|show} [number ...]\n" 1714" {zero|resetlog} [number ...]\n" 1715"do \"ipfw -h\" or see ipfw manpage for details\n" 1716); 1717 1718 exit(EX_USAGE); 1719} 1720 1721static void 1722help(void) 1723{ 1724 1725 fprintf(stderr, "ipfw syntax summary:\n" 1726"ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1727"ipfw {pipe|queue} N config BODY\n" 1728"ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1729"\n" 1730"RULE: [1..] [PROB] BODY\n" 1731"RULENUM: INTEGER(1..65534)\n" 1732"PROB: prob REAL(0..1)\n" 1733"BODY: check-state [LOG] (no body) |\n" 1734" ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1735"ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1736" {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1737"ADDR: [ MAC dst src ether_type ] \n" 1738" [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1739"IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1740"IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1741"OPTION_LIST: OPTION [,OPTION_LIST]\n" 1742); 1743exit(0); 1744} 1745 1746 1747static int 1748lookup_host (char *host, struct in_addr *ipaddr) 1749{ 1750 struct hostent *he; 1751 1752 if (!inet_aton(host, ipaddr)) { 1753 if ((he = gethostbyname(host)) == NULL) 1754 return(-1); 1755 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1756 } 1757 return(0); 1758} 1759 1760/* 1761 * fills the addr and mask fields in the instruction as appropriate from av. 1762 * Update length as appropriate. 1763 * The following formats are allowed: 1764 * any matches any IP. Actually returns an empty instruction. 1765 * me returns O_IP_*_ME 1766 * 1.2.3.4 single IP address 1767 * 1.2.3.4:5.6.7.8 address:mask 1768 * 1.2.3.4/24 address/mask 1769 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1770 */ 1771static void 1772fill_ip(ipfw_insn_ip *cmd, char *av) 1773{ 1774 char *p = 0, md = 0; 1775 u_int32_t i; 1776 1777 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1778 1779 if (!strncmp(av, "any", strlen(av))) 1780 return; 1781 1782 if (!strncmp(av, "me", strlen(av))) { 1783 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1784 return; 1785 } 1786 1787 p = strchr(av, '/'); 1788 if (!p) 1789 p = strchr(av, ':'); 1790 if (p) { 1791 md = *p; 1792 *p++ = '\0'; 1793 } 1794 1795 if (lookup_host(av, &cmd->addr) != 0) 1796 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1797 switch (md) { 1798 case ':': 1799 if (!inet_aton(p, &cmd->mask)) 1800 errx(EX_DATAERR, "bad netmask ``%s''", p); 1801 break; 1802 case '/': 1803 i = atoi(p); 1804 if (i == 0) 1805 cmd->mask.s_addr = htonl(0); 1806 else if (i > 32) 1807 errx(EX_DATAERR, "bad width ``%s''", p); 1808 else 1809 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1810 break; 1811 default: 1812 cmd->mask.s_addr = htonl(~0); 1813 break; 1814 } 1815 cmd->addr.s_addr &= cmd->mask.s_addr; 1816 /* 1817 * now look if we have a set of addresses. They are stored as follows: 1818 * arg1 is the set size (powers of 2, 2..256) 1819 * addr is the base address IN HOST FORMAT 1820 * mask.. is an array of u_int32_t with bits set. 1821 */ 1822 if (p) 1823 p = strchr(p, '{'); 1824 if (p) { /* fetch addresses */ 1825 u_int32_t *d; 1826 int low, high; 1827 int i = contigmask((u_char *)&(cmd->mask), 32); 1828 1829 if (i < 24 || i > 31) { 1830 fprintf(stderr, "invalid set with mask %d\n", 1831 i); 1832 exit(0); 1833 } 1834 cmd->o.arg1 = 1<<(32-i); 1835 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1836 d = (u_int32_t *)&cmd->mask; 1837 cmd->o.opcode = O_IP_DST_SET; /* default */ 1838 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1839 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1840 d[i] = 0; /* clear masks */ 1841 1842 av = p+1; 1843 low = cmd->addr.s_addr & 0xff; 1844 high = low + cmd->o.arg1 - 1; 1845 while (isdigit(*av)) { 1846 char *s; 1847 u_int16_t a = strtol(av, &s, 0); 1848 1849 if (s == av) /* no parameter */ 1850 break; 1851 if (a < low || a > high) { 1852 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1853 a, low, high); 1854 exit(0); 1855 } 1856 a -= low; 1857 d[ a/32] |= 1<<(a & 31); 1858 if (*s != ',') 1859 break; 1860 av = s+1; 1861 } 1862 return; 1863 } 1864 1865 if (cmd->mask.s_addr == 0) { /* any */ 1866 if (cmd->o.len & F_NOT) 1867 errx(EX_DATAERR, "not any never matches"); 1868 else /* useless, nuke it */ 1869 return; 1870 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1871 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1872 else /* addr/mask */ 1873 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1874} 1875 1876 1877/* 1878 * helper function to process a set of flags and set bits in the 1879 * appropriate masks. 1880 */ 1881static void 1882fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1883 struct _s_x *flags, char *p) 1884{ 1885 u_int8_t set=0, clear=0; 1886 1887 while (p && *p) { 1888 char *q; /* points to the separator */ 1889 int val; 1890 u_int8_t *which; /* mask we are working on */ 1891 1892 if (*p == '!') { 1893 p++; 1894 which = &clear; 1895 } else 1896 which = &set; 1897 q = strchr(p, ','); 1898 if (q) 1899 *q++ = '\0'; 1900 val = match_token(flags, p); 1901 if (val <= 0) 1902 errx(EX_DATAERR, "invalid flag %s", p); 1903 *which |= (u_int8_t)val; 1904 p = q; 1905 } 1906 cmd->opcode = opcode; 1907 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 1908 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 1909} 1910 1911 1912static void 1913delete(int ac, char *av[]) 1914{ 1915 u_int32_t rulenum; 1916 struct dn_pipe pipe; 1917 int i; 1918 int exitval = EX_OK; 1919 int do_set = 0; 1920 1921 memset(&pipe, 0, sizeof pipe); 1922 1923 av++; ac--; 1924 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 1925 do_set = 1; /* delete set */ 1926 ac--; av++; 1927 } 1928 1929 /* Rule number */ 1930 while (ac && isdigit(**av)) { 1931 i = atoi(*av); av++; ac--; 1932 if (do_pipe) { 1933 if (do_pipe == 1) 1934 pipe.pipe_nr = i; 1935 else 1936 pipe.fs.fs_nr = i; 1937 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 1938 &pipe, sizeof pipe); 1939 if (i) { 1940 exitval = 1; 1941 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 1942 do_pipe == 1 ? pipe.pipe_nr : 1943 pipe.fs.fs_nr); 1944 } 1945 } else { 1946 rulenum = (i & 0xffff) | (do_set << 24); 1947 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 1948 sizeof rulenum); 1949 if (i) { 1950 exitval = EX_UNAVAILABLE; 1951 warn("rule %u: setsockopt(IP_FW_DEL)", 1952 rulenum); 1953 } 1954 } 1955 } 1956 if (exitval != EX_OK) 1957 exit(exitval); 1958} 1959 1960 1961/* 1962 * fill the interface structure. We do not check the name as we can 1963 * create interfaces dynamically, so checking them at insert time 1964 * makes relatively little sense. 1965 * A '*' following the name means any unit. 1966 */ 1967static void 1968fill_iface(ipfw_insn_if *cmd, char *arg) 1969{ 1970 cmd->name[0] = '\0'; 1971 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 1972 1973 /* Parse the interface or address */ 1974 if (!strcmp(arg, "any")) 1975 cmd->o.len = 0; /* effectively ignore this command */ 1976 else if (!isdigit(*arg)) { 1977 char *q; 1978 1979 strncpy(cmd->name, arg, sizeof(cmd->name)); 1980 cmd->name[sizeof(cmd->name) - 1] = '\0'; 1981 /* find first digit or wildcard */ 1982 for (q = cmd->name; *q && !isdigit(*q) && *q != '*'; q++) 1983 continue; 1984 cmd->p.unit = (*q == '*') ? -1 : atoi(q); 1985 *q = '\0'; 1986 } else if (!inet_aton(arg, &cmd->p.ip)) 1987 errx(EX_DATAERR, "bad ip address ``%s''", arg); 1988} 1989 1990/* 1991 * the following macro returns an error message if we run out of 1992 * arguments. 1993 */ 1994#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 1995 1996static void 1997config_pipe(int ac, char **av) 1998{ 1999 struct dn_pipe pipe; 2000 int i; 2001 char *end; 2002 u_int32_t a; 2003 void *par = NULL; 2004 2005 memset(&pipe, 0, sizeof pipe); 2006 2007 av++; ac--; 2008 /* Pipe number */ 2009 if (ac && isdigit(**av)) { 2010 i = atoi(*av); av++; ac--; 2011 if (do_pipe == 1) 2012 pipe.pipe_nr = i; 2013 else 2014 pipe.fs.fs_nr = i; 2015 } 2016 while (ac > 0) { 2017 double d; 2018 int tok = match_token(dummynet_params, *av); 2019 ac--; av++; 2020 2021 switch(tok) { 2022 case TOK_NOERROR: 2023 pipe.fs.flags_fs |= DN_NOERROR; 2024 break; 2025 2026 case TOK_PLR: 2027 NEED1("plr needs argument 0..1\n"); 2028 d = strtod(av[0], NULL); 2029 if (d > 1) 2030 d = 1; 2031 else if (d < 0) 2032 d = 0; 2033 pipe.fs.plr = (int)(d*0x7fffffff); 2034 ac--; av++; 2035 break; 2036 2037 case TOK_QUEUE: 2038 NEED1("queue needs queue size\n"); 2039 end = NULL; 2040 pipe.fs.qsize = strtoul(av[0], &end, 0); 2041 if (*end == 'K' || *end == 'k') { 2042 pipe.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2043 pipe.fs.qsize *= 1024; 2044 } else if (*end == 'B' || !strncmp(end, "by", 2)) { 2045 pipe.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2046 } 2047 ac--; av++; 2048 break; 2049 2050 case TOK_BUCKETS: 2051 NEED1("buckets needs argument\n"); 2052 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2053 ac--; av++; 2054 break; 2055 2056 case TOK_MASK: 2057 NEED1("mask needs mask specifier\n"); 2058 /* 2059 * per-flow queue, mask is dst_ip, dst_port, 2060 * src_ip, src_port, proto measured in bits 2061 */ 2062 par = NULL; 2063 2064 pipe.fs.flow_mask.dst_ip = 0; 2065 pipe.fs.flow_mask.src_ip = 0; 2066 pipe.fs.flow_mask.dst_port = 0; 2067 pipe.fs.flow_mask.src_port = 0; 2068 pipe.fs.flow_mask.proto = 0; 2069 end = NULL; 2070 2071 while (ac >= 1) { 2072 u_int32_t *p32 = NULL; 2073 u_int16_t *p16 = NULL; 2074 2075 tok = match_token(dummynet_params, *av); 2076 ac--; av++; 2077 switch(tok) { 2078 case TOK_ALL: 2079 /* 2080 * special case, all bits significant 2081 */ 2082 pipe.fs.flow_mask.dst_ip = ~0; 2083 pipe.fs.flow_mask.src_ip = ~0; 2084 pipe.fs.flow_mask.dst_port = ~0; 2085 pipe.fs.flow_mask.src_port = ~0; 2086 pipe.fs.flow_mask.proto = ~0; 2087 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2088 goto end_mask; 2089 2090 case TOK_DSTIP: 2091 p32 = &pipe.fs.flow_mask.dst_ip; 2092 break; 2093 2094 case TOK_SRCIP: 2095 p32 = &pipe.fs.flow_mask.src_ip; 2096 break; 2097 2098 case TOK_DSTPORT: 2099 p16 = &pipe.fs.flow_mask.dst_port; 2100 break; 2101 2102 case TOK_SRCPORT: 2103 p16 = &pipe.fs.flow_mask.src_port; 2104 break; 2105 2106 case TOK_PROTO: 2107 break; 2108 2109 default: 2110 ac++; av--; /* backtrack */ 2111 goto end_mask; 2112 } 2113 if (ac < 1) 2114 errx(EX_USAGE, "mask: value missing"); 2115 if (*av[0] == '/') { 2116 a = strtoul(av[0]+1, &end, 0); 2117 a = (a == 32) ? ~0 : (1 << a) - 1; 2118 } else 2119 a = strtoul(av[0], &end, 0); 2120 if (p32 != NULL) 2121 *p32 = a; 2122 else if (p16 != NULL) { 2123 if (a > 65535) 2124 errx(EX_DATAERR, 2125 "mask: must be 16 bit"); 2126 *p16 = (u_int16_t)a; 2127 } else { 2128 if (a > 255) 2129 errx(EX_DATAERR, 2130 "mask: must be 8 bit"); 2131 pipe.fs.flow_mask.proto = (u_int8_t)a; 2132 } 2133 if (a != 0) 2134 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2135 ac--; av++; 2136 } /* end while, config masks */ 2137end_mask: 2138 break; 2139 2140 case TOK_RED: 2141 case TOK_GRED: 2142 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2143 pipe.fs.flags_fs |= DN_IS_RED; 2144 if (tok == TOK_GRED) 2145 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2146 /* 2147 * the format for parameters is w_q/min_th/max_th/max_p 2148 */ 2149 if ((end = strsep(&av[0], "/"))) { 2150 double w_q = strtod(end, NULL); 2151 if (w_q > 1 || w_q <= 0) 2152 errx(EX_DATAERR, "0 < w_q <= 1"); 2153 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2154 } 2155 if ((end = strsep(&av[0], "/"))) { 2156 pipe.fs.min_th = strtoul(end, &end, 0); 2157 if (*end == 'K' || *end == 'k') 2158 pipe.fs.min_th *= 1024; 2159 } 2160 if ((end = strsep(&av[0], "/"))) { 2161 pipe.fs.max_th = strtoul(end, &end, 0); 2162 if (*end == 'K' || *end == 'k') 2163 pipe.fs.max_th *= 1024; 2164 } 2165 if ((end = strsep(&av[0], "/"))) { 2166 double max_p = strtod(end, NULL); 2167 if (max_p > 1 || max_p <= 0) 2168 errx(EX_DATAERR, "0 < max_p <= 1"); 2169 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2170 } 2171 ac--; av++; 2172 break; 2173 2174 case TOK_DROPTAIL: 2175 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2176 break; 2177 2178 case TOK_BW: 2179 NEED1("bw needs bandwidth or interface\n"); 2180 if (do_pipe != 1) 2181 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2182 /* 2183 * set clocking interface or bandwidth value 2184 */ 2185 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 2186 int l = sizeof(pipe.if_name)-1; 2187 /* interface name */ 2188 strncpy(pipe.if_name, av[0], l); 2189 pipe.if_name[l] = '\0'; 2190 pipe.bandwidth = 0; 2191 } else { 2192 pipe.if_name[0] = '\0'; 2193 pipe.bandwidth = strtoul(av[0], &end, 0); 2194 if (*end == 'K' || *end == 'k') { 2195 end++; 2196 pipe.bandwidth *= 1000; 2197 } else if (*end == 'M') { 2198 end++; 2199 pipe.bandwidth *= 1000000; 2200 } 2201 if (*end == 'B' || !strncmp(end, "by", 2)) 2202 pipe.bandwidth *= 8; 2203 if (pipe.bandwidth < 0) 2204 errx(EX_DATAERR, "bandwidth too large"); 2205 } 2206 ac--; av++; 2207 break; 2208 2209 case TOK_DELAY: 2210 if (do_pipe != 1) 2211 errx(EX_DATAERR, "delay only valid for pipes"); 2212 NEED1("delay needs argument 0..10000ms\n"); 2213 pipe.delay = strtoul(av[0], NULL, 0); 2214 ac--; av++; 2215 break; 2216 2217 case TOK_WEIGHT: 2218 if (do_pipe == 1) 2219 errx(EX_DATAERR,"weight only valid for queues"); 2220 NEED1("weight needs argument 0..100\n"); 2221 pipe.fs.weight = strtoul(av[0], &end, 0); 2222 ac--; av++; 2223 break; 2224 2225 case TOK_PIPE: 2226 if (do_pipe == 1) 2227 errx(EX_DATAERR,"pipe only valid for queues"); 2228 NEED1("pipe needs pipe_number\n"); 2229 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2230 ac--; av++; 2231 break; 2232 2233 default: 2234 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2235 } 2236 } 2237 if (do_pipe == 1) { 2238 if (pipe.pipe_nr == 0) 2239 errx(EX_DATAERR, "pipe_nr must be > 0"); 2240 if (pipe.delay > 10000) 2241 errx(EX_DATAERR, "delay must be < 10000"); 2242 } else { /* do_pipe == 2, queue */ 2243 if (pipe.fs.parent_nr == 0) 2244 errx(EX_DATAERR, "pipe must be > 0"); 2245 if (pipe.fs.weight >100) 2246 errx(EX_DATAERR, "weight must be <= 100"); 2247 } 2248 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2249 if (pipe.fs.qsize > 1024*1024) 2250 errx(EX_DATAERR, "queue size must be < 1MB"); 2251 } else { 2252 if (pipe.fs.qsize > 100) 2253 errx(EX_DATAERR, "2 <= queue size <= 100"); 2254 } 2255 if (pipe.fs.flags_fs & DN_IS_RED) { 2256 size_t len; 2257 int lookup_depth, avg_pkt_size; 2258 double s, idle, weight, w_q; 2259 struct clockinfo clock; 2260 int t; 2261 2262 if (pipe.fs.min_th >= pipe.fs.max_th) 2263 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2264 pipe.fs.min_th, pipe.fs.max_th); 2265 if (pipe.fs.max_th == 0) 2266 errx(EX_DATAERR, "max_th must be > 0"); 2267 2268 len = sizeof(int); 2269 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2270 &lookup_depth, &len, NULL, 0) == -1) 2271 2272 errx(1, "sysctlbyname(\"%s\")", 2273 "net.inet.ip.dummynet.red_lookup_depth"); 2274 if (lookup_depth == 0) 2275 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2276 " must be greater than zero"); 2277 2278 len = sizeof(int); 2279 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2280 &avg_pkt_size, &len, NULL, 0) == -1) 2281 2282 errx(1, "sysctlbyname(\"%s\")", 2283 "net.inet.ip.dummynet.red_avg_pkt_size"); 2284 if (avg_pkt_size == 0) 2285 errx(EX_DATAERR, 2286 "net.inet.ip.dummynet.red_avg_pkt_size must" 2287 " be greater than zero"); 2288 2289 len = sizeof(struct clockinfo); 2290 if (sysctlbyname("kern.clockrate", &clock, &len, NULL, 0) == -1) 2291 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 2292 2293 /* 2294 * Ticks needed for sending a medium-sized packet. 2295 * Unfortunately, when we are configuring a WF2Q+ queue, we 2296 * do not have bandwidth information, because that is stored 2297 * in the parent pipe, and also we have multiple queues 2298 * competing for it. So we set s=0, which is not very 2299 * correct. But on the other hand, why do we want RED with 2300 * WF2Q+ ? 2301 */ 2302 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2303 s = 0; 2304 else 2305 s = clock.hz * avg_pkt_size * 8 / pipe.bandwidth; 2306 2307 /* 2308 * max idle time (in ticks) before avg queue size becomes 0. 2309 * NOTA: (3/w_q) is approx the value x so that 2310 * (1-w_q)^x < 10^-3. 2311 */ 2312 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2313 idle = s * 3. / w_q; 2314 pipe.fs.lookup_step = (int)idle / lookup_depth; 2315 if (!pipe.fs.lookup_step) 2316 pipe.fs.lookup_step = 1; 2317 weight = 1 - w_q; 2318 for (t = pipe.fs.lookup_step; t > 0; --t) 2319 weight *= weight; 2320 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2321 } 2322 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2323 sizeof pipe); 2324 if (i) 2325 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2326} 2327 2328static void 2329get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2330{ 2331 int i, l; 2332 2333 for (i=0; i<6; i++) 2334 addr[i] = mask[i] = 0; 2335 if (!strcmp(p, "any")) 2336 return; 2337 2338 for (i=0; *p && i<6;i++, p++) { 2339 addr[i] = strtol(p, &p, 16); 2340 if (*p != ':') /* we start with the mask */ 2341 break; 2342 } 2343 if (*p == '/') { /* mask len */ 2344 l = strtol(p+1, &p, 0); 2345 for (i=0; l>0; l -=8, i++) 2346 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2347 } else if (*p == '&') { /* mask */ 2348 for (i=0, p++; *p && i<6;i++, p++) { 2349 mask[i] = strtol(p, &p, 16); 2350 if (*p != ':') 2351 break; 2352 } 2353 } else if (*p == '\0') { 2354 for (i=0; i<6; i++) 2355 mask[i] = 0xff; 2356 } 2357 for (i=0; i<6; i++) 2358 addr[i] &= mask[i]; 2359} 2360 2361/* 2362 * helper function, updates the pointer to cmd with the length 2363 * of the current command, and also cleans up the first word of 2364 * the new command in case it has been clobbered before. 2365 */ 2366static ipfw_insn * 2367next_cmd(ipfw_insn *cmd) 2368{ 2369 cmd += F_LEN(cmd); 2370 bzero(cmd, sizeof(*cmd)); 2371 return cmd; 2372} 2373 2374/* 2375 * A function to fill simple commands of size 1. 2376 * Existing flags are preserved. 2377 */ 2378static void 2379fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2380{ 2381 cmd->opcode = opcode; 2382 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2383 cmd->arg1 = arg; 2384} 2385 2386/* 2387 * Fetch and add the MAC address and type, with masks. This generates one or 2388 * two microinstructions, and returns the pointer to the last one. 2389 */ 2390static ipfw_insn * 2391add_mac(ipfw_insn *cmd, int ac, char *av[]) 2392{ 2393 ipfw_insn_mac *mac; 2394 2395 if (ac < 2) 2396 errx(EX_DATAERR, "MAC dst src"); 2397 2398 cmd->opcode = O_MACADDR2; 2399 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2400 2401 mac = (ipfw_insn_mac *)cmd; 2402 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2403 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2404 return cmd; 2405} 2406 2407static ipfw_insn * 2408add_mactype(ipfw_insn *cmd, int ac, char *av) 2409{ 2410 if (ac < 1) 2411 errx(EX_DATAERR, "missing MAC type"); 2412 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2413 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2414 cmd->opcode = O_MAC_TYPE; 2415 return cmd; 2416 } else 2417 return NULL; 2418} 2419 2420static ipfw_insn * 2421add_proto(ipfw_insn *cmd, char *av) 2422{ 2423 struct protoent *pe; 2424 u_char proto = 0; 2425 2426 if (!strncmp(av, "all", strlen(av))) 2427 ; /* same as "ip" */ 2428 else if ((proto = atoi(av)) > 0) 2429 ; /* all done! */ 2430 else if ((pe = getprotobyname(av)) != NULL) 2431 proto = pe->p_proto; 2432 else 2433 return NULL; 2434 if (proto != IPPROTO_IP) 2435 fill_cmd(cmd, O_PROTO, 0, proto); 2436 return cmd; 2437} 2438 2439static ipfw_insn * 2440add_srcip(ipfw_insn *cmd, char *av) 2441{ 2442 fill_ip((ipfw_insn_ip *)cmd, av); 2443 if (cmd->opcode == O_IP_DST_SET) /* set */ 2444 cmd->opcode = O_IP_SRC_SET; 2445 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2446 cmd->opcode = O_IP_SRC_ME; 2447 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2448 cmd->opcode = O_IP_SRC; 2449 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2450 cmd->opcode = O_IP_SRC_MASK; 2451 return cmd; 2452} 2453 2454static ipfw_insn * 2455add_dstip(ipfw_insn *cmd, char *av) 2456{ 2457 fill_ip((ipfw_insn_ip *)cmd, av); 2458 if (cmd->opcode == O_IP_DST_SET) /* set */ 2459 ; 2460 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2461 cmd->opcode = O_IP_DST_ME; 2462 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2463 cmd->opcode = O_IP_DST; 2464 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2465 cmd->opcode = O_IP_DST_MASK; 2466 return cmd; 2467} 2468 2469static ipfw_insn * 2470add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2471{ 2472 if (!strncmp(av, "any", strlen(av))) { 2473 return NULL; 2474 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2475 /* XXX todo: check that we have a protocol with ports */ 2476 cmd->opcode = opcode; 2477 return cmd; 2478 } 2479 return NULL; 2480} 2481 2482/* 2483 * Parse arguments and assemble the microinstructions which make up a rule. 2484 * Rules are added into the 'rulebuf' and then copied in the correct order 2485 * into the actual rule. 2486 * 2487 * The syntax for a rule starts with the action, followed by an 2488 * optional log action, and the various match patterns. 2489 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 2490 * (generated if the rule includes a keep-state option), then the 2491 * various match patterns, the "log" action, and the actual action. 2492 * 2493 */ 2494static void 2495add(int ac, char *av[]) 2496{ 2497 /* 2498 * rules are added into the 'rulebuf' and then copied in 2499 * the correct order into the actual rule. 2500 * Some things that need to go out of order (prob, action etc.) 2501 * go into actbuf[]. 2502 */ 2503 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2504 2505 ipfw_insn *src, *dst, *cmd, *action, *prev; 2506 ipfw_insn *first_cmd; /* first match pattern */ 2507 2508 struct ip_fw *rule; 2509 2510 /* 2511 * various flags used to record that we entered some fields. 2512 */ 2513 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2514 2515 int i; 2516 2517 int open_par = 0; /* open parenthesis ( */ 2518 2519 /* proto is here because it is used to fetch ports */ 2520 u_char proto = IPPROTO_IP; /* default protocol */ 2521 2522 double match_prob = 1; /* match probability, default is always match */ 2523 2524 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2525 bzero(cmdbuf, sizeof(cmdbuf)); 2526 bzero(rulebuf, sizeof(rulebuf)); 2527 2528 rule = (struct ip_fw *)rulebuf; 2529 cmd = (ipfw_insn *)cmdbuf; 2530 action = (ipfw_insn *)actbuf; 2531 2532 av++; ac--; 2533 2534 /* [rule N] -- Rule number optional */ 2535 if (ac && isdigit(**av)) { 2536 rule->rulenum = atoi(*av); 2537 av++; 2538 ac--; 2539 } 2540 2541 /* [set N] -- set number (0..30), optional */ 2542 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2543 int set = strtoul(av[1], NULL, 10); 2544 if (set < 0 || set > 30) 2545 errx(EX_DATAERR, "illegal set %s", av[1]); 2546 rule->set = set; 2547 av += 2; ac -= 2; 2548 } 2549 2550 /* [prob D] -- match probability, optional */ 2551 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2552 match_prob = strtod(av[1], NULL); 2553 2554 if (match_prob <= 0 || match_prob > 1) 2555 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2556 av += 2; ac -= 2; 2557 } 2558 2559 /* action -- mandatory */ 2560 NEED1("missing action"); 2561 i = match_token(rule_actions, *av); 2562 ac--; av++; 2563 action->len = 1; /* default */ 2564 switch(i) { 2565 case TOK_CHECKSTATE: 2566 have_state = action; 2567 action->opcode = O_CHECK_STATE; 2568 break; 2569 2570 case TOK_ACCEPT: 2571 action->opcode = O_ACCEPT; 2572 break; 2573 2574 case TOK_DENY: 2575 action->opcode = O_DENY; 2576 action->arg1 = 0; 2577 break; 2578 2579 case TOK_REJECT: 2580 action->opcode = O_REJECT; 2581 action->arg1 = ICMP_UNREACH_HOST; 2582 break; 2583 2584 case TOK_RESET: 2585 action->opcode = O_REJECT; 2586 action->arg1 = ICMP_REJECT_RST; 2587 break; 2588 2589 case TOK_UNREACH: 2590 action->opcode = O_REJECT; 2591 NEED1("missing reject code"); 2592 fill_reject_code(&action->arg1, *av); 2593 ac--; av++; 2594 break; 2595 2596 case TOK_COUNT: 2597 action->opcode = O_COUNT; 2598 break; 2599 2600 case TOK_QUEUE: 2601 case TOK_PIPE: 2602 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2603 case TOK_SKIPTO: 2604 if (i == TOK_QUEUE) 2605 action->opcode = O_QUEUE; 2606 else if (i == TOK_PIPE) 2607 action->opcode = O_PIPE; 2608 else if (i == TOK_SKIPTO) 2609 action->opcode = O_SKIPTO; 2610 NEED1("missing skipto/pipe/queue number"); 2611 action->arg1 = strtoul(*av, NULL, 10); 2612 av++; ac--; 2613 break; 2614 2615 case TOK_DIVERT: 2616 case TOK_TEE: 2617 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2618 NEED1("missing divert/tee port"); 2619 action->arg1 = strtoul(*av, NULL, 0); 2620 if (action->arg1 == 0) { 2621 struct servent *s; 2622 setservent(1); 2623 s = getservbyname(av[0], "divert"); 2624 if (s != NULL) 2625 action->arg1 = ntohs(s->s_port); 2626 else 2627 errx(EX_DATAERR, "illegal divert/tee port"); 2628 } 2629 ac--; av++; 2630 break; 2631 2632 case TOK_FORWARD: { 2633 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2634 char *s, *end; 2635 2636 NEED1("missing forward address[:port]"); 2637 2638 action->opcode = O_FORWARD_IP; 2639 action->len = F_INSN_SIZE(ipfw_insn_sa); 2640 2641 p->sa.sin_len = sizeof(struct sockaddr_in); 2642 p->sa.sin_family = AF_INET; 2643 p->sa.sin_port = 0; 2644 /* 2645 * locate the address-port separator (':' or ',') 2646 */ 2647 s = strchr(*av, ':'); 2648 if (s == NULL) 2649 s = strchr(*av, ','); 2650 if (s != NULL) { 2651 *(s++) = '\0'; 2652 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2653 if (s == end) 2654 errx(EX_DATAERR, 2655 "illegal forwarding port ``%s''", s); 2656 p->sa.sin_port = (u_short)i; 2657 } 2658 lookup_host(*av, &(p->sa.sin_addr)); 2659 } 2660 ac--; av++; 2661 break; 2662 2663 default: 2664 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2665 } 2666 action = next_cmd(action); 2667 2668 /* 2669 * [log [logamount N]] -- log, optional 2670 * 2671 * If exists, it goes first in the cmdbuf, but then it is 2672 * skipped in the copy section to the end of the buffer. 2673 */ 2674 if (ac && !strncmp(*av, "log", strlen(*av))) { 2675 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2676 2677 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2678 cmd->opcode = O_LOG; 2679 av++; ac--; 2680 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2681 ac--; av++; 2682 NEED1("logamount requires argument"); 2683 c->max_log = atoi(*av); 2684 if (c->max_log < 0) 2685 errx(EX_DATAERR, "logamount must be positive"); 2686 ac--; av++; 2687 } 2688 cmd = next_cmd(cmd); 2689 } 2690 2691 if (have_state) /* must be a check-state, we are done */ 2692 goto done; 2693 2694#define OR_START(target) \ 2695 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2696 if (open_par) \ 2697 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2698 prev = NULL; \ 2699 open_par = 1; \ 2700 if ( (av[0])[1] == '\0') { \ 2701 ac--; av++; \ 2702 } else \ 2703 (*av)++; \ 2704 } \ 2705 target: \ 2706 2707 2708#define CLOSE_PAR \ 2709 if (open_par) { \ 2710 if (ac && ( \ 2711 !strncmp(*av, ")", strlen(*av)) || \ 2712 !strncmp(*av, "}", strlen(*av)) )) { \ 2713 prev = NULL; \ 2714 open_par = 0; \ 2715 ac--; av++; \ 2716 } else \ 2717 errx(EX_USAGE, "missing \")\"\n"); \ 2718 } 2719 2720#define NOT_BLOCK \ 2721 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2722 if (cmd->len & F_NOT) \ 2723 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2724 cmd->len |= F_NOT; \ 2725 ac--; av++; \ 2726 } 2727 2728#define OR_BLOCK(target) \ 2729 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2730 if (prev == NULL || open_par == 0) \ 2731 errx(EX_DATAERR, "invalid OR block"); \ 2732 prev->len |= F_OR; \ 2733 ac--; av++; \ 2734 goto target; \ 2735 } \ 2736 CLOSE_PAR; 2737 2738 first_cmd = cmd; 2739 2740#if 0 2741 /* 2742 * MAC addresses, optional. 2743 * If we have this, we skip the part "proto from src to dst" 2744 * and jump straight to the option parsing. 2745 */ 2746 NOT_BLOCK; 2747 NEED1("missing protocol"); 2748 if (!strncmp(*av, "MAC", strlen(*av)) || 2749 !strncmp(*av, "mac", strlen(*av))) { 2750 ac--; av++; /* the "MAC" keyword */ 2751 add_mac(cmd, ac, av); /* exits in case of errors */ 2752 cmd = next_cmd(cmd); 2753 ac -= 2; av += 2; /* dst-mac and src-mac */ 2754 NOT_BLOCK; 2755 NEED1("missing mac type"); 2756 if (add_mactype(cmd, ac, av[0])) 2757 cmd = next_cmd(cmd); 2758 ac--; av++; /* any or mac-type */ 2759 goto read_options; 2760 } 2761#endif 2762 2763 /* 2764 * protocol, mandatory 2765 */ 2766 OR_START(get_proto); 2767 NOT_BLOCK; 2768 NEED1("missing protocol"); 2769 if (add_proto(cmd, *av)) { 2770 av++; ac--; 2771 if (F_LEN(cmd) == 0) /* plain IP */ 2772 proto = 0; 2773 else { 2774 proto = cmd->arg1; 2775 prev = cmd; 2776 cmd = next_cmd(cmd); 2777 } 2778 } else if (first_cmd != cmd) { 2779 errx(EX_DATAERR, "invalid protocol ``%s''", av); 2780 } else 2781 goto read_options; 2782 OR_BLOCK(get_proto); 2783 2784 /* 2785 * "from", mandatory 2786 */ 2787 if (!ac || strncmp(*av, "from", strlen(*av))) 2788 errx(EX_USAGE, "missing ``from''"); 2789 ac--; av++; 2790 2791 /* 2792 * source IP, mandatory 2793 */ 2794 OR_START(source_ip); 2795 NOT_BLOCK; /* optional "not" */ 2796 NEED1("missing source address"); 2797 if (add_srcip(cmd, *av)) { 2798 ac--; av++; 2799 if (F_LEN(cmd) != 0) { /* ! any */ 2800 prev = cmd; 2801 cmd = next_cmd(cmd); 2802 } 2803 } 2804 OR_BLOCK(source_ip); 2805 2806 /* 2807 * source ports, optional 2808 */ 2809 NOT_BLOCK; /* optional "not" */ 2810 if (ac) { 2811 if (!strncmp(*av, "any", strlen(*av)) || 2812 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2813 ac--; av++; 2814 if (F_LEN(cmd) != 0) 2815 cmd = next_cmd(cmd); 2816 } 2817 } 2818 2819 /* 2820 * "to", mandatory 2821 */ 2822 if (!ac || strncmp(*av, "to", strlen(*av))) 2823 errx(EX_USAGE, "missing ``to''"); 2824 av++; ac--; 2825 2826 /* 2827 * destination, mandatory 2828 */ 2829 OR_START(dest_ip); 2830 NOT_BLOCK; /* optional "not" */ 2831 NEED1("missing dst address"); 2832 if (add_dstip(cmd, *av)) { 2833 ac--; av++; 2834 if (F_LEN(cmd) != 0) { /* ! any */ 2835 prev = cmd; 2836 cmd = next_cmd(cmd); 2837 } 2838 } 2839 OR_BLOCK(dest_ip); 2840 2841 /* 2842 * dest. ports, optional 2843 */ 2844 NOT_BLOCK; /* optional "not" */ 2845 if (ac) { 2846 if (!strncmp(*av, "any", strlen(*av)) || 2847 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2848 ac--; av++; 2849 if (F_LEN(cmd) != 0) 2850 cmd = next_cmd(cmd); 2851 } 2852 } 2853 2854read_options: 2855 if (ac && first_cmd == cmd) { 2856 /* 2857 * nothing specified so far, store in the rule to ease 2858 * printout later. 2859 */ 2860 rule->_pad = 1; 2861 } 2862 prev = NULL; 2863 while (ac) { 2864 char *s; 2865 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2866 2867 s = *av; 2868 cmd32 = (ipfw_insn_u32 *)cmd; 2869 2870 if (*s == '!') { /* alternate syntax for NOT */ 2871 if (cmd->len & F_NOT) 2872 errx(EX_USAGE, "double \"not\" not allowed\n"); 2873 cmd->len = F_NOT; 2874 s++; 2875 } 2876 i = match_token(rule_options, s); 2877 ac--; av++; 2878 switch(i) { 2879 case TOK_NOT: 2880 if (cmd->len & F_NOT) 2881 errx(EX_USAGE, "double \"not\" not allowed\n"); 2882 cmd->len = F_NOT; 2883 break; 2884 2885 case TOK_OR: 2886 if (open_par == 0 || prev == NULL) 2887 errx(EX_USAGE, "invalid \"or\" block\n"); 2888 prev->len |= F_OR; 2889 break; 2890 2891 case TOK_STARTBRACE: 2892 if (open_par) 2893 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2894 open_par = 1; 2895 break; 2896 2897 case TOK_ENDBRACE: 2898 if (!open_par) 2899 errx(EX_USAGE, "+missing \")\"\n"); 2900 open_par = 0; 2901 prev = NULL; 2902 break; 2903 2904 case TOK_IN: 2905 fill_cmd(cmd, O_IN, 0, 0); 2906 break; 2907 2908 case TOK_OUT: 2909 cmd->len ^= F_NOT; /* toggle F_NOT */ 2910 fill_cmd(cmd, O_IN, 0, 0); 2911 break; 2912 2913 case TOK_FRAG: 2914 fill_cmd(cmd, O_FRAG, 0, 0); 2915 break; 2916 2917 case TOK_LAYER2: 2918 fill_cmd(cmd, O_LAYER2, 0, 0); 2919 break; 2920 2921 case TOK_XMIT: 2922 case TOK_RECV: 2923 case TOK_VIA: 2924 NEED1("recv, xmit, via require interface name" 2925 " or address"); 2926 fill_iface((ipfw_insn_if *)cmd, av[0]); 2927 ac--; av++; 2928 if (F_LEN(cmd) == 0) /* not a valid address */ 2929 break; 2930 if (i == TOK_XMIT) 2931 cmd->opcode = O_XMIT; 2932 else if (i == TOK_RECV) 2933 cmd->opcode = O_RECV; 2934 else if (i == TOK_VIA) 2935 cmd->opcode = O_VIA; 2936 break; 2937 2938 case TOK_ICMPTYPES: 2939 NEED1("icmptypes requires list of types"); 2940 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 2941 av++; ac--; 2942 break; 2943 2944 case TOK_IPTTL: 2945 NEED1("ipttl requires TTL"); 2946 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 2947 ac--; av++; 2948 break; 2949 2950 case TOK_IPID: 2951 NEED1("ipid requires length"); 2952 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 2953 ac--; av++; 2954 break; 2955 2956 case TOK_IPLEN: 2957 NEED1("iplen requires length"); 2958 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 2959 ac--; av++; 2960 break; 2961 2962 case TOK_IPVER: 2963 NEED1("ipver requires version"); 2964 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 2965 ac--; av++; 2966 break; 2967 2968 case TOK_IPPRECEDENCE: 2969 NEED1("ipprecedence requires value"); 2970 fill_cmd(cmd, O_IPPRECEDENCE, 0, 2971 (strtoul(*av, NULL, 0) & 7) << 5); 2972 ac--; av++; 2973 break; 2974 2975 case TOK_IPOPTS: 2976 NEED1("missing argument for ipoptions"); 2977 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 2978 ac--; av++; 2979 break; 2980 2981 case TOK_IPTOS: 2982 NEED1("missing argument for iptos"); 2983 fill_flags(cmd, O_IPTOS, f_iptos, *av); 2984 ac--; av++; 2985 break; 2986 2987 case TOK_UID: 2988 NEED1("uid requires argument"); 2989 { 2990 char *end; 2991 uid_t uid; 2992 struct passwd *pwd; 2993 2994 cmd->opcode = O_UID; 2995 uid = strtoul(*av, &end, 0); 2996 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 2997 if (pwd == NULL) 2998 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 2999 cmd32->d[0] = pwd->pw_uid; 3000 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3001 ac--; av++; 3002 } 3003 break; 3004 3005 case TOK_GID: 3006 NEED1("gid requires argument"); 3007 { 3008 char *end; 3009 gid_t gid; 3010 struct group *grp; 3011 3012 cmd->opcode = O_GID; 3013 gid = strtoul(*av, &end, 0); 3014 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3015 if (grp == NULL) 3016 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3017 cmd32->d[0] = grp->gr_gid; 3018 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3019 ac--; av++; 3020 } 3021 break; 3022 3023 case TOK_ESTAB: 3024 fill_cmd(cmd, O_ESTAB, 0, 0); 3025 break; 3026 3027 case TOK_SETUP: 3028 fill_cmd(cmd, O_TCPFLAGS, 0, 3029 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3030 break; 3031 3032 case TOK_TCPOPTS: 3033 NEED1("missing argument for tcpoptions"); 3034 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3035 ac--; av++; 3036 break; 3037 3038 case TOK_TCPSEQ: 3039 case TOK_TCPACK: 3040 NEED1("tcpseq/tcpack requires argument"); 3041 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3042 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3043 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3044 ac--; av++; 3045 break; 3046 3047 case TOK_TCPWIN: 3048 NEED1("tcpwin requires length"); 3049 fill_cmd(cmd, O_TCPWIN, 0, 3050 htons(strtoul(*av, NULL, 0))); 3051 ac--; av++; 3052 break; 3053 3054 case TOK_TCPFLAGS: 3055 NEED1("missing argument for tcpflags"); 3056 cmd->opcode = O_TCPFLAGS; 3057 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3058 ac--; av++; 3059 break; 3060 3061 case TOK_KEEPSTATE: 3062 if (open_par) 3063 errx(EX_USAGE, "keep-state cannot be part " 3064 "of an or block"); 3065 if (have_state) 3066 errx(EX_USAGE, "only one of keep-state " 3067 "and limit is allowed"); 3068 have_state = cmd; 3069 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3070 break; 3071 3072 case TOK_LIMIT: 3073 if (open_par) 3074 errx(EX_USAGE, "limit cannot be part " 3075 "of an or block"); 3076 if (have_state) 3077 errx(EX_USAGE, "only one of keep-state " 3078 "and limit is allowed"); 3079 NEED1("limit needs mask and # of connections"); 3080 have_state = cmd; 3081 { 3082 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3083 3084 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3085 cmd->opcode = O_LIMIT; 3086 c->limit_mask = 0; 3087 c->conn_limit = 0; 3088 for (; ac >1 ;) { 3089 int val; 3090 3091 val = match_token(limit_masks, *av); 3092 if (val <= 0) 3093 break; 3094 c->limit_mask |= val; 3095 ac--; av++; 3096 } 3097 c->conn_limit = atoi(*av); 3098 if (c->conn_limit == 0) 3099 errx(EX_USAGE, "limit: limit must be >0"); 3100 if (c->limit_mask == 0) 3101 errx(EX_USAGE, "missing limit mask"); 3102 ac--; av++; 3103 } 3104 break; 3105 3106 case TOK_PROTO: 3107 NEED1("missing protocol"); 3108 if (add_proto(cmd, *av)) { 3109 proto = cmd->arg1; 3110 ac--; av++; 3111 } else 3112 errx(EX_DATAERR, "invalid protocol ``%s''", av); 3113 break; 3114 3115 case TOK_SRCIP: 3116 NEED1("missing source IP"); 3117 if (add_srcip(cmd, *av)) { 3118 ac--; av++; 3119 } 3120 break; 3121 3122 case TOK_DSTIP: 3123 NEED1("missing destination IP"); 3124 if (add_dstip(cmd, *av)) { 3125 ac--; av++; 3126 } 3127 break; 3128 3129 case TOK_SRCPORT: 3130 NEED1("missing source port"); 3131 if (!strncmp(*av, "any", strlen(*av)) || 3132 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3133 ac--; av++; 3134 } else 3135 errx(EX_DATAERR, "invalid source port %s", *av); 3136 break; 3137 3138 case TOK_DSTPORT: 3139 NEED1("missing destination port"); 3140 if (!strncmp(*av, "any", strlen(*av)) || 3141 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3142 ac--; av++; 3143 } else 3144 errx(EX_DATAERR, "invalid destination port %s", 3145 *av); 3146 break; 3147 3148 case TOK_MAC: 3149 if (ac < 2) 3150 errx(EX_USAGE, "MAC dst-mac src-mac"); 3151 if (add_mac(cmd, ac, av)) { 3152 ac -= 2; av += 2; 3153 } 3154 break; 3155 3156 case TOK_MACTYPE: 3157 NEED1("missing mac type"); 3158 if (!add_mactype(cmd, ac, *av)) 3159 errx(EX_DATAERR, "invalid mac type %s", av); 3160 ac--; av++; 3161 break; 3162 3163 default: 3164 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3165 } 3166 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3167 prev = cmd; 3168 cmd = next_cmd(cmd); 3169 } 3170 } 3171 3172done: 3173 /* 3174 * Now copy stuff into the rule. 3175 * If we have a keep-state option, the first instruction 3176 * must be a PROBE_STATE (which is generated here). 3177 * If we have a LOG option, it was stored as the first command, 3178 * and now must be moved to the top of the action part. 3179 */ 3180 dst = (ipfw_insn *)rule->cmd; 3181 3182 /* 3183 * First thing to write into the command stream is the match probability. 3184 */ 3185 if (match_prob != 1) { /* 1 means always match */ 3186 dst->opcode = O_PROB; 3187 dst->len = 2; 3188 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3189 dst += dst->len; 3190 } 3191 3192 /* 3193 * generate O_PROBE_STATE if necessary 3194 */ 3195 if (have_state && have_state->opcode != O_CHECK_STATE) { 3196 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3197 dst = next_cmd(dst); 3198 } 3199 /* 3200 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3201 */ 3202 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3203 i = F_LEN(src); 3204 3205 switch (src->opcode) { 3206 case O_LOG: 3207 case O_KEEP_STATE: 3208 case O_LIMIT: 3209 break; 3210 default: 3211 bcopy(src, dst, i * sizeof(u_int32_t)); 3212 dst += i; 3213 } 3214 } 3215 3216 /* 3217 * put back the have_state command as last opcode 3218 */ 3219 if (have_state && have_state->opcode != O_CHECK_STATE) { 3220 i = F_LEN(have_state); 3221 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3222 dst += i; 3223 } 3224 /* 3225 * start action section 3226 */ 3227 rule->act_ofs = dst - rule->cmd; 3228 3229 /* 3230 * put back O_LOG if necessary 3231 */ 3232 src = (ipfw_insn *)cmdbuf; 3233 if ( src->opcode == O_LOG ) { 3234 i = F_LEN(src); 3235 bcopy(src, dst, i * sizeof(u_int32_t)); 3236 dst += i; 3237 } 3238 /* 3239 * copy all other actions 3240 */ 3241 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3242 i = F_LEN(src); 3243 bcopy(src, dst, i * sizeof(u_int32_t)); 3244 dst += i; 3245 } 3246 3247 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3248 i = (void *)dst - (void *)rule; 3249 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3250 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3251 if (!do_quiet) 3252 show_ipfw(rule, 10, 10); 3253} 3254 3255static void 3256zero(int ac, char *av[]) 3257{ 3258 int rulenum; 3259 int failed = EX_OK; 3260 3261 av++; ac--; 3262 3263 if (!ac) { 3264 /* clear all entries */ 3265 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3266 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3267 if (!do_quiet) 3268 printf("Accounting cleared.\n"); 3269 3270 return; 3271 } 3272 3273 while (ac) { 3274 /* Rule number */ 3275 if (isdigit(**av)) { 3276 rulenum = atoi(*av); 3277 av++; 3278 ac--; 3279 if (setsockopt(s, IPPROTO_IP, 3280 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3281 warn("rule %u: setsockopt(IP_FW_ZERO)", 3282 rulenum); 3283 failed = EX_UNAVAILABLE; 3284 } else if (!do_quiet) 3285 printf("Entry %d cleared\n", rulenum); 3286 } else { 3287 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3288 } 3289 } 3290 if (failed != EX_OK) 3291 exit(failed); 3292} 3293 3294static void 3295resetlog(int ac, char *av[]) 3296{ 3297 int rulenum; 3298 int failed = EX_OK; 3299 3300 av++; ac--; 3301 3302 if (!ac) { 3303 /* clear all entries */ 3304 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3305 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3306 if (!do_quiet) 3307 printf("Logging counts reset.\n"); 3308 3309 return; 3310 } 3311 3312 while (ac) { 3313 /* Rule number */ 3314 if (isdigit(**av)) { 3315 rulenum = atoi(*av); 3316 av++; 3317 ac--; 3318 if (setsockopt(s, IPPROTO_IP, 3319 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3320 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3321 rulenum); 3322 failed = EX_UNAVAILABLE; 3323 } else if (!do_quiet) 3324 printf("Entry %d logging count reset\n", 3325 rulenum); 3326 } else { 3327 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3328 } 3329 } 3330 if (failed != EX_OK) 3331 exit(failed); 3332} 3333 3334static void 3335flush() 3336{ 3337 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3338 3339 if (!do_force && !do_quiet) { /* need to ask user */ 3340 int c; 3341 3342 printf("Are you sure? [yn] "); 3343 fflush(stdout); 3344 do { 3345 c = toupper(getc(stdin)); 3346 while (c != '\n' && getc(stdin) != '\n') 3347 if (feof(stdin)) 3348 return; /* and do not flush */ 3349 } while (c != 'Y' && c != 'N'); 3350 printf("\n"); 3351 if (c == 'N') /* user said no */ 3352 return; 3353 } 3354 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3355 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3356 do_pipe ? "DUMMYNET" : "FW"); 3357 if (!do_quiet) 3358 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3359} 3360 3361static int 3362ipfw_main(int ac, char **av) 3363{ 3364 int ch; 3365 3366 if (ac == 1) 3367 show_usage(); 3368 3369 /* Set the force flag for non-interactive processes */ 3370 do_force = !isatty(STDIN_FILENO); 3371 3372 optind = optreset = 1; 3373 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3374 switch (ch) { 3375 case 'h': /* help */ 3376 help(); 3377 break; /* NOTREACHED */ 3378 3379 case 's': /* sort */ 3380 do_sort = atoi(optarg); 3381 break; 3382 case 'a': 3383 do_acct = 1; 3384 break; 3385 case 'c': 3386 do_compact = 1; 3387 break; 3388 case 'd': 3389 do_dynamic = 1; 3390 break; 3391 case 'e': 3392 do_expired = 1; 3393 break; 3394 case 'f': 3395 do_force = 1; 3396 break; 3397 case 'N': 3398 do_resolv = 1; 3399 break; 3400 case 'q': 3401 do_quiet = 1; 3402 break; 3403 case 'S': 3404 show_sets = 1; 3405 break; 3406 case 't': 3407 do_time = 1; 3408 break; 3409 case 'v': /* verbose */ 3410 verbose++; 3411 break; 3412 default: 3413 show_usage(); 3414 } 3415 3416 ac -= optind; 3417 av += optind; 3418 NEED1("bad arguments, for usage summary ``ipfw''"); 3419 3420 /* 3421 * optional: pipe or queue 3422 */ 3423 if (!strncmp(*av, "pipe", strlen(*av))) { 3424 do_pipe = 1; 3425 ac--; 3426 av++; 3427 } else if (!strncmp(*av, "queue", strlen(*av))) { 3428 do_pipe = 2; 3429 ac--; 3430 av++; 3431 } 3432 NEED1("missing command"); 3433 3434 /* 3435 * for pipes and queues we normally say 'pipe NN config' 3436 * but the code is easier to parse as 'pipe config NN' 3437 * so we swap the two arguments. 3438 */ 3439 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3440 char *p = av[0]; 3441 av[0] = av[1]; 3442 av[1] = p; 3443 } 3444 if (!strncmp(*av, "add", strlen(*av))) 3445 add(ac, av); 3446 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3447 config_pipe(ac, av); 3448 else if (!strncmp(*av, "delete", strlen(*av))) 3449 delete(ac, av); 3450 else if (!strncmp(*av, "flush", strlen(*av))) 3451 flush(); 3452 else if (!strncmp(*av, "zero", strlen(*av))) 3453 zero(ac, av); 3454 else if (!strncmp(*av, "resetlog", strlen(*av))) 3455 resetlog(ac, av); 3456 else if (!strncmp(*av, "print", strlen(*av)) || 3457 !strncmp(*av, "list", strlen(*av))) 3458 list(ac, av); 3459 else if (!strncmp(*av, "set", strlen(*av))) 3460 sets_handler(ac, av); 3461 else if (!strncmp(*av, "enable", strlen(*av))) 3462 sysctl_handler(ac, av, 1); 3463 else if (!strncmp(*av, "disable", strlen(*av))) 3464 sysctl_handler(ac, av, 0); 3465 else if (!strncmp(*av, "show", strlen(*av))) { 3466 do_acct++; 3467 list(ac, av); 3468 } else 3469 errx(EX_USAGE, "bad command `%s'", *av); 3470 return 0; 3471} 3472 3473 3474static void 3475ipfw_readfile(int ac, char *av[]) 3476{ 3477#define MAX_ARGS 32 3478#define WHITESP " \t\f\v\n\r" 3479 char buf[BUFSIZ]; 3480 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3481 char linename[10]; 3482 int i=0, lineno=0, qflag=0, pflag=0, status; 3483 FILE *f = NULL; 3484 pid_t preproc = 0; 3485 int c; 3486 3487 while ((c = getopt(ac, av, "p:q")) != -1) { 3488 switch(c) { 3489 case 'p': 3490 pflag = 1; 3491 cmd = optarg; 3492 args[0] = cmd; 3493 i = 1; 3494 break; 3495 3496 case 'q': 3497 qflag = 1; 3498 break; 3499 3500 default: 3501 errx(EX_USAGE, "bad arguments, for usage" 3502 " summary ``ipfw''"); 3503 } 3504 3505 if (pflag) 3506 break; 3507 } 3508 3509 if (pflag) { 3510 /* Pass all but the last argument to the preprocessor. */ 3511 while (optind < ac - 1) { 3512 if (i >= MAX_ARGS) 3513 errx(EX_USAGE, "too many preprocessor options"); 3514 args[i++] = av[optind++]; 3515 } 3516 } 3517 3518 av += optind; 3519 ac -= optind; 3520 if (ac != 1) 3521 errx(EX_USAGE, "extraneous filename arguments"); 3522 3523 if ((f = fopen(av[0], "r")) == NULL) 3524 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3525 3526 if (pflag) { 3527 /* pipe through preprocessor (cpp or m4) */ 3528 int pipedes[2]; 3529 3530 args[i] = 0; 3531 3532 if (pipe(pipedes) == -1) 3533 err(EX_OSERR, "cannot create pipe"); 3534 3535 switch((preproc = fork())) { 3536 case -1: 3537 err(EX_OSERR, "cannot fork"); 3538 3539 case 0: 3540 /* child */ 3541 if (dup2(fileno(f), 0) == -1 3542 || dup2(pipedes[1], 1) == -1) 3543 err(EX_OSERR, "dup2()"); 3544 fclose(f); 3545 close(pipedes[1]); 3546 close(pipedes[0]); 3547 execvp(cmd, args); 3548 err(EX_OSERR, "execvp(%s) failed", cmd); 3549 3550 default: 3551 /* parent */ 3552 fclose(f); 3553 close(pipedes[1]); 3554 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3555 int savederrno = errno; 3556 3557 (void)kill(preproc, SIGTERM); 3558 errno = savederrno; 3559 err(EX_OSERR, "fdopen()"); 3560 } 3561 } 3562 } 3563 3564 while (fgets(buf, BUFSIZ, f)) { 3565 lineno++; 3566 sprintf(linename, "Line %d", lineno); 3567 args[0] = linename; 3568 3569 if (*buf == '#') 3570 continue; 3571 if ((p = strchr(buf, '#')) != NULL) 3572 *p = '\0'; 3573 i = 1; 3574 if (qflag) 3575 args[i++] = "-q"; 3576 for (a = strtok(buf, WHITESP); 3577 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3578 args[i] = a; 3579 if (i == (qflag? 2: 1)) 3580 continue; 3581 if (i == MAX_ARGS) 3582 errx(EX_USAGE, "%s: too many arguments", 3583 linename); 3584 args[i] = NULL; 3585 3586 ipfw_main(i, args); 3587 } 3588 fclose(f); 3589 if (pflag) { 3590 if (waitpid(preproc, &status, 0) == -1) 3591 errx(EX_OSERR, "waitpid()"); 3592 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3593 errx(EX_UNAVAILABLE, 3594 "preprocessor exited with status %d", 3595 WEXITSTATUS(status)); 3596 else if (WIFSIGNALED(status)) 3597 errx(EX_UNAVAILABLE, 3598 "preprocessor exited with signal %d", 3599 WTERMSIG(status)); 3600 } 3601} 3602 3603int 3604main(int ac, char *av[]) 3605{ 3606 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3607 if (s < 0) 3608 err(EX_UNAVAILABLE, "socket"); 3609 3610 /* 3611 * If the last argument is an absolute pathname, interpret it 3612 * as a file to be preprocessed. 3613 */ 3614 3615 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3616 ipfw_readfile(ac, av); 3617 else 3618 ipfw_main(ac, av); 3619 return EX_OK; 3620} 3621