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