1 /* 2 * Copyright (c) 2002 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $ 21 */ 22 23 #include <sys/param.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 #include <sys/time.h> 29 #include <sys/wait.h> 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <limits.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <stdarg.h> 42 #include <string.h> 43 #include <timeconv.h> 44 #include <unistd.h> 45 #include <sysexits.h> 46 47 #include <net/if.h> 48 #include <netinet/in.h> 49 #include <netinet/in_systm.h> 50 #include <netinet/ip.h> 51 #include <netinet/ip_icmp.h> 52 #include <net/ipfw/ip_fw.h> 53 #include <net/route.h> /* def. of struct route */ 54 #include <net/ethernet.h> 55 #include <net/dummynet/ip_dummynet.h> 56 #include <netinet/tcp.h> 57 #include <arpa/inet.h> 58 59 int s, /* main RAW socket */ 60 do_resolv, /* Would try to resolve all */ 61 do_acct, /* Show packet/byte count */ 62 do_time, /* Show time stamps */ 63 do_quiet, /* Be quiet in add and flush */ 64 do_force, /* Don't ask for confirmation */ 65 do_pipe, /* this cmd refers to a pipe */ 66 do_sort, /* field to sort results (0 = no) */ 67 do_dynamic, /* display dynamic rules */ 68 do_expired, /* display expired dynamic rules */ 69 do_compact, /* show rules in compact mode */ 70 show_sets, /* display rule sets */ 71 verbose; 72 73 #define IP_MASK_ALL 0xffffffff 74 75 /* 76 * structure to hold flag names and associated values to be 77 * set in the appropriate masks. 78 * A NULL string terminates the array. 79 * Often, an element with 0 value contains an error string. 80 * 81 */ 82 struct _s_x { 83 char *s; 84 int x; 85 }; 86 87 static struct _s_x f_tcpflags[] = { 88 { "syn", TH_SYN }, 89 { "fin", TH_FIN }, 90 { "ack", TH_ACK }, 91 { "psh", TH_PUSH }, 92 { "rst", TH_RST }, 93 { "urg", TH_URG }, 94 { "tcp flag", 0 }, 95 { NULL, 0 } 96 }; 97 98 static struct _s_x f_tcpopts[] = { 99 { "mss", IP_FW_TCPOPT_MSS }, 100 { "maxseg", IP_FW_TCPOPT_MSS }, 101 { "window", IP_FW_TCPOPT_WINDOW }, 102 { "sack", IP_FW_TCPOPT_SACK }, 103 { "ts", IP_FW_TCPOPT_TS }, 104 { "timestamp", IP_FW_TCPOPT_TS }, 105 { "cc", IP_FW_TCPOPT_CC }, 106 { "tcp option", 0 }, 107 { NULL, 0 } 108 }; 109 110 /* 111 * IP options span the range 0 to 255 so we need to remap them 112 * (though in fact only the low 5 bits are significant). 113 */ 114 static struct _s_x f_ipopts[] = { 115 { "ssrr", IP_FW_IPOPT_SSRR}, 116 { "lsrr", IP_FW_IPOPT_LSRR}, 117 { "rr", IP_FW_IPOPT_RR}, 118 { "ts", IP_FW_IPOPT_TS}, 119 { "ip option", 0 }, 120 { NULL, 0 } 121 }; 122 123 static struct _s_x f_iptos[] = { 124 { "lowdelay", IPTOS_LOWDELAY}, 125 { "throughput", IPTOS_THROUGHPUT}, 126 { "reliability", IPTOS_RELIABILITY}, 127 { "mincost", IPTOS_MINCOST}, 128 { "congestion", IPTOS_CE}, 129 { "ecntransport", IPTOS_ECT}, 130 { "ip tos option", 0}, 131 { NULL, 0 } 132 }; 133 134 static struct _s_x limit_masks[] = { 135 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 136 {"src-addr", DYN_SRC_ADDR}, 137 {"src-port", DYN_SRC_PORT}, 138 {"dst-addr", DYN_DST_ADDR}, 139 {"dst-port", DYN_DST_PORT}, 140 {NULL, 0} 141 }; 142 143 /* 144 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 145 * This is only used in this code. 146 */ 147 #define IPPROTO_ETHERTYPE 0x1000 148 static struct _s_x ether_types[] = { 149 /* 150 * Note, we cannot use "-:&/" in the names because they are field 151 * separators in the type specifications. Also, we use s = NULL as 152 * end-delimiter, because a type of 0 can be legal. 153 */ 154 { "ip", 0x0800 }, 155 { "ipv4", 0x0800 }, 156 { "ipv6", 0x86dd }, 157 { "arp", 0x0806 }, 158 { "rarp", 0x8035 }, 159 { "vlan", 0x8100 }, 160 { "loop", 0x9000 }, 161 { "trail", 0x1000 }, 162 { "pppoe_disc", 0x8863 }, 163 { "pppoe_sess", 0x8864 }, 164 { "ipx_8022", 0x00E0 }, 165 { "ipx_8023", 0x0000 }, 166 { "ipx_ii", 0x8137 }, 167 { "ipx_snap", 0x8137 }, 168 { "ipx", 0x8137 }, 169 { "ns", 0x0600 }, 170 { NULL, 0 } 171 }; 172 173 static void show_usage(void); 174 175 enum tokens { 176 TOK_NULL=0, 177 178 TOK_OR, 179 TOK_NOT, 180 TOK_STARTBRACE, 181 TOK_ENDBRACE, 182 183 TOK_ACCEPT, 184 TOK_COUNT, 185 TOK_PIPE, 186 TOK_QUEUE, 187 TOK_DIVERT, 188 TOK_TEE, 189 TOK_FORWARD, 190 TOK_SKIPTO, 191 TOK_DENY, 192 TOK_REJECT, 193 TOK_RESET, 194 TOK_UNREACH, 195 TOK_CHECKSTATE, 196 197 TOK_UID, 198 TOK_GID, 199 TOK_IN, 200 TOK_LIMIT, 201 TOK_KEEPSTATE, 202 TOK_LAYER2, 203 TOK_OUT, 204 TOK_XMIT, 205 TOK_RECV, 206 TOK_VIA, 207 TOK_FRAG, 208 TOK_IPOPTS, 209 TOK_IPLEN, 210 TOK_IPID, 211 TOK_IPPRECEDENCE, 212 TOK_IPTOS, 213 TOK_IPTTL, 214 TOK_IPVER, 215 TOK_ESTAB, 216 TOK_SETUP, 217 TOK_TCPFLAGS, 218 TOK_TCPOPTS, 219 TOK_TCPSEQ, 220 TOK_TCPACK, 221 TOK_TCPWIN, 222 TOK_ICMPTYPES, 223 TOK_MAC, 224 TOK_MACTYPE, 225 226 TOK_PLR, 227 TOK_NOERROR, 228 TOK_BUCKETS, 229 TOK_DSTIP, 230 TOK_SRCIP, 231 TOK_DSTPORT, 232 TOK_SRCPORT, 233 TOK_ALL, 234 TOK_MASK, 235 TOK_BW, 236 TOK_DELAY, 237 TOK_RED, 238 TOK_GRED, 239 TOK_DROPTAIL, 240 TOK_PROTO, 241 TOK_WEIGHT, 242 }; 243 244 struct _s_x dummynet_params[] = { 245 { "plr", TOK_PLR }, 246 { "noerror", TOK_NOERROR }, 247 { "buckets", TOK_BUCKETS }, 248 { "dst-ip", TOK_DSTIP }, 249 { "src-ip", TOK_SRCIP }, 250 { "dst-port", TOK_DSTPORT }, 251 { "src-port", TOK_SRCPORT }, 252 { "proto", TOK_PROTO }, 253 { "weight", TOK_WEIGHT }, 254 { "all", TOK_ALL }, 255 { "mask", TOK_MASK }, 256 { "droptail", TOK_DROPTAIL }, 257 { "red", TOK_RED }, 258 { "gred", TOK_GRED }, 259 { "bw", TOK_BW }, 260 { "bandwidth", TOK_BW }, 261 { "delay", TOK_DELAY }, 262 { "pipe", TOK_PIPE }, 263 { "queue", TOK_QUEUE }, 264 { "dummynet-params", TOK_NULL }, 265 { NULL, 0 } 266 }; 267 268 struct _s_x rule_actions[] = { 269 { "accept", TOK_ACCEPT }, 270 { "pass", TOK_ACCEPT }, 271 { "allow", TOK_ACCEPT }, 272 { "permit", TOK_ACCEPT }, 273 { "count", TOK_COUNT }, 274 { "pipe", TOK_PIPE }, 275 { "queue", TOK_QUEUE }, 276 { "divert", TOK_DIVERT }, 277 { "tee", TOK_TEE }, 278 { "fwd", TOK_FORWARD }, 279 { "forward", TOK_FORWARD }, 280 { "skipto", TOK_SKIPTO }, 281 { "deny", TOK_DENY }, 282 { "drop", TOK_DENY }, 283 { "reject", TOK_REJECT }, 284 { "reset", TOK_RESET }, 285 { "unreach", TOK_UNREACH }, 286 { "check-state", TOK_CHECKSTATE }, 287 { NULL, TOK_NULL }, 288 { NULL, 0 } 289 }; 290 291 struct _s_x rule_options[] = { 292 { "uid", TOK_UID }, 293 { "gid", TOK_GID }, 294 { "in", TOK_IN }, 295 { "limit", TOK_LIMIT }, 296 { "keep-state", TOK_KEEPSTATE }, 297 { "layer2", TOK_LAYER2 }, 298 { "out", TOK_OUT }, 299 { "xmit", TOK_XMIT }, 300 { "recv", TOK_RECV }, 301 { "via", TOK_VIA }, 302 { "fragment", TOK_FRAG }, 303 { "frag", TOK_FRAG }, 304 { "ipoptions", TOK_IPOPTS }, 305 { "ipopts", TOK_IPOPTS }, 306 { "iplen", TOK_IPLEN }, 307 { "ipid", TOK_IPID }, 308 { "ipprecedence", TOK_IPPRECEDENCE }, 309 { "iptos", TOK_IPTOS }, 310 { "ipttl", TOK_IPTTL }, 311 { "ipversion", TOK_IPVER }, 312 { "ipver", TOK_IPVER }, 313 { "estab", TOK_ESTAB }, 314 { "established", TOK_ESTAB }, 315 { "setup", TOK_SETUP }, 316 { "tcpflags", TOK_TCPFLAGS }, 317 { "tcpflgs", TOK_TCPFLAGS }, 318 { "tcpoptions", TOK_TCPOPTS }, 319 { "tcpopts", TOK_TCPOPTS }, 320 { "tcpseq", TOK_TCPSEQ }, 321 { "tcpack", TOK_TCPACK }, 322 { "tcpwin", TOK_TCPWIN }, 323 { "icmptype", TOK_ICMPTYPES }, 324 { "icmptypes", TOK_ICMPTYPES }, 325 { "dst-ip", TOK_DSTIP }, 326 { "src-ip", TOK_SRCIP }, 327 { "dst-port", TOK_DSTPORT }, 328 { "src-port", TOK_SRCPORT }, 329 { "proto", TOK_PROTO }, 330 { "MAC", TOK_MAC }, 331 { "mac", TOK_MAC }, 332 { "mac-type", TOK_MACTYPE }, 333 334 { "not", TOK_NOT }, /* pseudo option */ 335 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 336 { "or", TOK_OR }, /* pseudo option */ 337 { "|", /* escape */ TOK_OR }, /* pseudo option */ 338 { "{", TOK_STARTBRACE }, /* pseudo option */ 339 { "(", TOK_STARTBRACE }, /* pseudo option */ 340 { "}", TOK_ENDBRACE }, /* pseudo option */ 341 { ")", TOK_ENDBRACE }, /* pseudo option */ 342 { NULL, TOK_NULL }, 343 { NULL, 0 } 344 }; 345 346 /** 347 * match_token takes a table and a string, returns the value associated 348 * with the string (0 meaning an error in most cases) 349 */ 350 static int 351 match_token(struct _s_x *table, char *string) 352 { 353 struct _s_x *pt; 354 int i = strlen(string); 355 356 for (pt = table ; i && pt->s != NULL ; pt++) 357 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 358 return pt->x; 359 return -1; 360 }; 361 362 static char * 363 match_value(struct _s_x *p, u_int32_t value) 364 { 365 for (; p->s != NULL; p++) 366 if (p->x == value) 367 return p->s; 368 return NULL; 369 } 370 371 /* 372 * prints one port, symbolic or numeric 373 */ 374 static void 375 print_port(int proto, u_int16_t port) 376 { 377 378 if (proto == IPPROTO_ETHERTYPE) { 379 char *s; 380 381 if (do_resolv && (s = match_value(ether_types, port)) ) 382 printf("%s", s); 383 else 384 printf("0x%04x", port); 385 } else { 386 struct servent *se = NULL; 387 if (do_resolv) { 388 struct protoent *pe = getprotobynumber(proto); 389 390 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 391 } 392 if (se) 393 printf("%s", se->s_name); 394 else 395 printf("%d", port); 396 } 397 } 398 399 /* 400 * print the values in a list of ports 401 * XXX todo: add support for mask. 402 */ 403 static void 404 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 405 { 406 u_int16_t *p = cmd->ports; 407 int i; 408 char *sep= " "; 409 410 if (cmd->o.len & F_NOT) 411 printf(" not"); 412 if (opcode != 0) 413 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 414 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 415 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 416 printf("%s", sep); 417 print_port(proto, p[0]); 418 if (p[0] != p[1]) { 419 printf("-"); 420 print_port(proto, p[1]); 421 } 422 sep = ","; 423 } 424 } 425 426 /* 427 * Like strtol, but also translates service names into port numbers 428 * for some protocols. 429 * In particular: 430 * proto == -1 disables the protocol check; 431 * proto == IPPROTO_ETHERTYPE looks up an internal table 432 * proto == <some value in /etc/protocols> matches the values there. 433 * Returns *end == s in case the parameter is not found. 434 */ 435 static int 436 strtoport(char *s, char **end, int base, int proto) 437 { 438 char *p, *buf; 439 char *s1; 440 int i; 441 442 *end = s; /* default - not found */ 443 if ( *s == '\0') 444 return 0; /* not found */ 445 446 if (isdigit(*s)) 447 return strtol(s, end, base); 448 449 /* 450 * find separator. '\\' escapes the next char. 451 */ 452 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 453 if (*s1 == '\\' && s1[1] != '\0') 454 s1++; 455 456 buf = malloc(s1 - s + 1); 457 if (buf == NULL) 458 return 0; 459 460 /* 461 * copy into a buffer skipping backslashes 462 */ 463 for (p = s, i = 0; p != s1 ; p++) 464 if ( *p != '\\') 465 buf[i++] = *p; 466 buf[i++] = '\0'; 467 468 if (proto == IPPROTO_ETHERTYPE) { 469 i = match_token(ether_types, buf); 470 free(buf); 471 if (i != -1) { /* found */ 472 *end = s1; 473 return i; 474 } 475 } else { 476 struct protoent *pe = NULL; 477 struct servent *se; 478 479 if (proto != 0) 480 pe = getprotobynumber(proto); 481 setservent(1); 482 se = getservbyname(buf, pe ? pe->p_name : NULL); 483 free(buf); 484 if (se != NULL) { 485 *end = s1; 486 return ntohs(se->s_port); 487 } 488 } 489 return 0; /* not found */ 490 } 491 492 /* 493 * fill the body of the command with the list of port ranges. 494 * At the moment it only understands numeric ranges. 495 */ 496 static int 497 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 498 { 499 u_int16_t *p = cmd->ports; 500 int i = 0; 501 char *s = av; 502 503 while (*s) { 504 u_int16_t a, b; 505 506 a = strtoport(av, &s, 0, proto); 507 if (s == av) /* no parameter */ 508 break; 509 if (*s == '-') { /* a range */ 510 av = s+1; 511 b = strtoport(av, &s, 0, proto); 512 if (s == av) /* no parameter */ 513 break; 514 p[0] = a; 515 p[1] = b; 516 } else if (*s == ',' || *s == '\0' ) { 517 p[0] = p[1] = a; 518 } else { /* invalid separator */ 519 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 520 *s, av); 521 } 522 i++; 523 p += 2; 524 av = s+1; 525 } 526 if (i > 0) { 527 if (i+1 > F_LEN_MASK) 528 errx(EX_DATAERR, "too many ports/ranges\n"); 529 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 530 } 531 return i; 532 } 533 534 static struct _s_x icmpcodes[] = { 535 { "net", ICMP_UNREACH_NET }, 536 { "host", ICMP_UNREACH_HOST }, 537 { "protocol", ICMP_UNREACH_PROTOCOL }, 538 { "port", ICMP_UNREACH_PORT }, 539 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 540 { "srcfail", ICMP_UNREACH_SRCFAIL }, 541 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 542 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 543 { "isolated", ICMP_UNREACH_ISOLATED }, 544 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 545 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 546 { "tosnet", ICMP_UNREACH_TOSNET }, 547 { "toshost", ICMP_UNREACH_TOSHOST }, 548 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 549 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 550 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 551 { NULL, 0 } 552 }; 553 554 static void 555 fill_reject_code(u_short *codep, char *str) 556 { 557 int val; 558 char *s; 559 560 val = strtoul(str, &s, 0); 561 if (s == str || *s != '\0' || val >= 0x100) 562 val = match_token(icmpcodes, str); 563 if (val < 0) 564 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 565 *codep = val; 566 return; 567 } 568 569 static void 570 print_reject_code(u_int16_t code) 571 { 572 char *s = match_value(icmpcodes, code); 573 574 if (s != NULL) 575 printf("unreach %s", s); 576 else 577 printf("unreach %u", code); 578 } 579 580 /* 581 * Returns the number of bits set (from left) in a contiguous bitmask, 582 * or -1 if the mask is not contiguous. 583 * XXX this needs a proper fix. 584 * This effectively works on masks in big-endian (network) format. 585 * when compiled on little endian architectures. 586 * 587 * First bit is bit 7 of the first byte -- note, for MAC addresses, 588 * the first bit on the wire is bit 0 of the first byte. 589 * len is the max length in bits. 590 */ 591 static int 592 contigmask(u_char *p, int len) 593 { 594 int i, n; 595 for (i=0; i<len ; i++) 596 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 597 break; 598 for (n=i+1; n < len; n++) 599 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 600 return -1; /* mask not contiguous */ 601 return i; 602 } 603 604 /* 605 * print flags set/clear in the two bitmasks passed as parameters. 606 * There is a specialized check for f_tcpflags. 607 */ 608 static void 609 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 610 { 611 char *comma=""; 612 int i; 613 u_char set = cmd->arg1 & 0xff; 614 u_char clear = (cmd->arg1 >> 8) & 0xff; 615 616 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 617 printf(" setup"); 618 return; 619 } 620 621 printf(" %s ", name); 622 for (i=0; list[i].x != 0; i++) { 623 if (set & list[i].x) { 624 set &= ~list[i].x; 625 printf("%s%s", comma, list[i].s); 626 comma = ","; 627 } 628 if (clear & list[i].x) { 629 clear &= ~list[i].x; 630 printf("%s!%s", comma, list[i].s); 631 comma = ","; 632 } 633 } 634 } 635 636 /* 637 * Print the ip address contained in a command. 638 */ 639 static void 640 print_ip(ipfw_insn_ip *cmd, char *s) 641 { 642 struct hostent *he = NULL; 643 int mb; 644 645 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 646 647 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 648 printf("me"); 649 return; 650 } 651 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 652 u_int32_t x, *d; 653 int i; 654 char comma = '{'; 655 656 x = cmd->o.arg1 - 1; 657 x = htonl( ~x ); 658 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 659 printf("%s/%d", inet_ntoa(cmd->addr), 660 contigmask((u_char *)&x, 32)); 661 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 662 x &= 0xff; /* base */ 663 d = (u_int32_t *)&(cmd->mask); 664 for (i=0; i < cmd->o.arg1; i++) 665 if (d[ i/32] & (1<<(i & 31))) { 666 printf("%c%d", comma, i+x); 667 comma = ','; 668 } 669 printf("}"); 670 return; 671 } 672 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 673 mb = 32; 674 else 675 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 676 if (mb == 32 && do_resolv) 677 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long), 678 AF_INET); 679 if (he != NULL) /* resolved to name */ 680 printf("%s", he->h_name); 681 else if (mb == 0) /* any */ 682 printf("any"); 683 else { /* numeric IP followed by some kind of mask */ 684 printf("%s", inet_ntoa(cmd->addr)); 685 if (mb < 0) 686 printf(":%s", inet_ntoa(cmd->mask)); 687 else if (mb < 32) 688 printf("/%d", mb); 689 } 690 } 691 692 /* 693 * prints a MAC address/mask pair 694 */ 695 static void 696 print_mac(u_char *addr, u_char *mask) 697 { 698 int l = contigmask(mask, 48); 699 700 if (l == 0) 701 printf(" any"); 702 else { 703 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 704 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 705 if (l == -1) 706 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 707 mask[0], mask[1], mask[2], 708 mask[3], mask[4], mask[5]); 709 else if (l < 48) 710 printf("/%d", l); 711 } 712 } 713 714 static void 715 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 716 { 717 u_int8_t type; 718 719 cmd->d[0] = 0; 720 while (*av) { 721 if (*av == ',') 722 av++; 723 724 type = strtoul(av, &av, 0); 725 726 if (*av != ',' && *av != '\0') 727 errx(EX_DATAERR, "invalid ICMP type"); 728 729 if (type > 31) 730 errx(EX_DATAERR, "ICMP type out of range"); 731 732 cmd->d[0] |= 1 << type; 733 } 734 cmd->o.opcode = O_ICMPTYPE; 735 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 736 } 737 738 static void 739 print_icmptypes(ipfw_insn_u32 *cmd) 740 { 741 int i; 742 char sep= ' '; 743 744 printf(" icmptypes"); 745 for (i = 0; i < 32; i++) { 746 if ( (cmd->d[0] & (1 << (i))) == 0) 747 continue; 748 printf("%c%d", sep, i); 749 sep = ','; 750 } 751 } 752 753 /* 754 * show_ipfw() prints the body of an ipfw rule. 755 * Because the standard rule has at least proto src_ip dst_ip, we use 756 * a helper function to produce these entries if not provided explicitly. 757 * The first argument is the list of fields we have, the second is 758 * the list of fields we want to be printed. 759 * 760 * Special cases if we have provided a MAC header: 761 * + if the rule does not contain IP addresses/ports, do not print them; 762 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 763 * 764 * Once we have 'have_options', IP header fields are printed as options. 765 */ 766 #define HAVE_PROTO 0x0001 767 #define HAVE_SRCIP 0x0002 768 #define HAVE_DSTIP 0x0004 769 #define HAVE_MAC 0x0008 770 #define HAVE_MACTYPE 0x0010 771 #define HAVE_OPTIONS 0x8000 772 773 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 774 static void 775 show_prerequisites(int *flags, int want, int cmd) 776 { 777 if ( (*flags & HAVE_IP) == HAVE_IP) 778 *flags |= HAVE_OPTIONS; 779 780 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 781 cmd != O_MAC_TYPE) { 782 /* 783 * mac-type was optimized out by the compiler, 784 * restore it 785 */ 786 printf(" any"); 787 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 788 return; 789 } 790 if ( !(*flags & HAVE_OPTIONS)) { 791 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 792 printf(" ip"); 793 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 794 printf(" from any"); 795 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 796 printf(" to any"); 797 } 798 *flags |= want; 799 } 800 801 static void 802 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth) 803 { 804 static int twidth = 0; 805 int l; 806 ipfw_insn *cmd; 807 int proto = 0; /* default */ 808 int flags = 0; /* prerequisites */ 809 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 810 int or_block = 0; /* we are in an or block */ 811 812 u_int32_t set_disable = rule->set_disable; 813 814 if (set_disable & (1 << rule->set)) { /* disabled */ 815 if (!show_sets) 816 return; 817 else 818 printf("# DISABLED "); 819 } 820 printf("%05u ", rule->rulenum); 821 822 if (do_acct) 823 printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth, 824 (uintmax_t)rule->bcnt); 825 826 if (do_time) { 827 char timestr[30]; 828 829 if (twidth == 0) { 830 strcpy(timestr, ctime((time_t *)&twidth)); 831 *strchr(timestr, '\n') = '\0'; 832 twidth = strlen(timestr); 833 } 834 if (rule->timestamp) { 835 time_t t = _long_to_time(rule->timestamp); 836 837 strcpy(timestr, ctime(&t)); 838 *strchr(timestr, '\n') = '\0'; 839 printf("%s ", timestr); 840 } else { 841 printf("%*s ", twidth, " "); 842 } 843 } 844 845 if (show_sets) 846 printf("set %d ", rule->set); 847 848 /* 849 * print the optional "match probability" 850 */ 851 if (rule->cmd_len > 0) { 852 cmd = rule->cmd ; 853 if (cmd->opcode == O_PROB) { 854 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 855 double d = 1.0 * p->d[0]; 856 857 d = (d / 0x7fffffff); 858 printf("prob %f ", d); 859 } 860 } 861 862 /* 863 * first print actions 864 */ 865 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 866 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 867 switch(cmd->opcode) { 868 case O_CHECK_STATE: 869 printf("check-state"); 870 flags = HAVE_IP; /* avoid printing anything else */ 871 break; 872 873 case O_ACCEPT: 874 printf("allow"); 875 break; 876 877 case O_COUNT: 878 printf("count"); 879 break; 880 881 case O_DENY: 882 printf("deny"); 883 break; 884 885 case O_REJECT: 886 if (cmd->arg1 == ICMP_REJECT_RST) 887 printf("reset"); 888 else if (cmd->arg1 == ICMP_UNREACH_HOST) 889 printf("reject"); 890 else 891 print_reject_code(cmd->arg1); 892 break; 893 894 case O_SKIPTO: 895 printf("skipto %u", cmd->arg1); 896 break; 897 898 case O_PIPE: 899 printf("pipe %u", cmd->arg1); 900 break; 901 902 case O_QUEUE: 903 printf("queue %u", cmd->arg1); 904 break; 905 906 case O_DIVERT: 907 printf("divert %u", cmd->arg1); 908 break; 909 910 case O_TEE: 911 printf("tee %u", cmd->arg1); 912 break; 913 914 case O_FORWARD_IP: 915 { 916 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 917 918 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 919 if (s->sa.sin_port) 920 printf(",%d", s->sa.sin_port); 921 } 922 break; 923 924 case O_LOG: /* O_LOG is printed last */ 925 logptr = (ipfw_insn_log *)cmd; 926 break; 927 928 default: 929 printf("** unrecognized action %d len %d", 930 cmd->opcode, cmd->len); 931 } 932 } 933 if (logptr) { 934 if (logptr->max_log > 0) 935 printf(" log logamount %d", logptr->max_log); 936 else 937 printf(" log"); 938 } 939 940 /* 941 * then print the body. 942 */ 943 if (rule->usr_flags & IPFW_USR_F_NORULE) { 944 /* empty rules before options */ 945 if (!do_compact) 946 printf(" ip from any to any"); 947 flags |= HAVE_IP | HAVE_OPTIONS; 948 } 949 950 for (l = rule->act_ofs, cmd = rule->cmd ; 951 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 952 /* useful alias */ 953 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 954 955 show_prerequisites(&flags, 0, cmd->opcode); 956 957 switch(cmd->opcode) { 958 case O_PROB: 959 break; /* done already */ 960 961 case O_PROBE_STATE: 962 break; /* no need to print anything here */ 963 964 case O_MACADDR2: { 965 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 966 967 if ((cmd->len & F_OR) && !or_block) 968 printf(" {"); 969 if (cmd->len & F_NOT) 970 printf(" not"); 971 printf(" MAC"); 972 flags |= HAVE_MAC; 973 print_mac( m->addr, m->mask); 974 print_mac( m->addr + 6, m->mask + 6); 975 } 976 break; 977 978 case O_MAC_TYPE: 979 if ((cmd->len & F_OR) && !or_block) 980 printf(" {"); 981 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 982 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 983 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 984 break; 985 986 case O_IP_SRC: 987 case O_IP_SRC_MASK: 988 case O_IP_SRC_ME: 989 case O_IP_SRC_SET: 990 show_prerequisites(&flags, HAVE_PROTO, 0); 991 if (!(flags & HAVE_SRCIP)) 992 printf(" from"); 993 if ((cmd->len & F_OR) && !or_block) 994 printf(" {"); 995 print_ip((ipfw_insn_ip *)cmd, 996 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 997 flags |= HAVE_SRCIP; 998 break; 999 1000 case O_IP_DST: 1001 case O_IP_DST_MASK: 1002 case O_IP_DST_ME: 1003 case O_IP_DST_SET: 1004 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1005 if (!(flags & HAVE_DSTIP)) 1006 printf(" to"); 1007 if ((cmd->len & F_OR) && !or_block) 1008 printf(" {"); 1009 print_ip((ipfw_insn_ip *)cmd, 1010 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1011 flags |= HAVE_DSTIP; 1012 break; 1013 1014 case O_IP_DSTPORT: 1015 show_prerequisites(&flags, HAVE_IP, 0); 1016 case O_IP_SRCPORT: 1017 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1018 if ((cmd->len & F_OR) && !or_block) 1019 printf(" {"); 1020 print_newports((ipfw_insn_u16 *)cmd, proto, 1021 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1022 break; 1023 1024 case O_PROTO: { 1025 struct protoent *pe; 1026 1027 if ((cmd->len & F_OR) && !or_block) 1028 printf(" {"); 1029 if (cmd->len & F_NOT) 1030 printf(" not"); 1031 proto = cmd->arg1; 1032 pe = getprotobynumber(cmd->arg1); 1033 if (flags & HAVE_OPTIONS) 1034 printf(" proto"); 1035 if (pe) 1036 printf(" %s", pe->p_name); 1037 else 1038 printf(" %u", cmd->arg1); 1039 } 1040 flags |= HAVE_PROTO; 1041 break; 1042 1043 default: /*options ... */ 1044 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1045 if ((cmd->len & F_OR) && !or_block) 1046 printf(" {"); 1047 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1048 printf(" not"); 1049 switch(cmd->opcode) { 1050 case O_FRAG: 1051 printf(" frag"); 1052 break; 1053 1054 case O_IN: 1055 printf(cmd->len & F_NOT ? " out" : " in"); 1056 break; 1057 1058 case O_LAYER2: 1059 printf(" layer2"); 1060 break; 1061 case O_XMIT: 1062 case O_RECV: 1063 case O_VIA: { 1064 char *s; 1065 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1066 1067 if (cmd->opcode == O_XMIT) 1068 s = "xmit"; 1069 else if (cmd->opcode == O_RECV) 1070 s = "recv"; 1071 else if (cmd->opcode == O_VIA) 1072 s = "via"; 1073 else 1074 s = "?huh?"; 1075 if (cmdif->name[0] == '\0') 1076 printf(" %s %s", s, 1077 inet_ntoa(cmdif->p.ip)); 1078 printf(" %s %s", s, cmdif->name); 1079 } 1080 break; 1081 1082 case O_IPID: 1083 printf(" ipid %u", cmd->arg1 ); 1084 break; 1085 1086 case O_IPTTL: 1087 printf(" ipttl %u", cmd->arg1 ); 1088 break; 1089 1090 case O_IPVER: 1091 printf(" ipver %u", cmd->arg1 ); 1092 break; 1093 1094 case O_IPPRECEDENCE: 1095 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1096 break; 1097 1098 case O_IPLEN: 1099 printf(" iplen %u", cmd->arg1 ); 1100 break; 1101 1102 case O_IPOPT: 1103 print_flags("ipoptions", cmd, f_ipopts); 1104 break; 1105 1106 case O_IPTOS: 1107 print_flags("iptos", cmd, f_iptos); 1108 break; 1109 1110 case O_ICMPTYPE: 1111 print_icmptypes((ipfw_insn_u32 *)cmd); 1112 break; 1113 1114 case O_ESTAB: 1115 printf(" established"); 1116 break; 1117 1118 case O_TCPFLAGS: 1119 print_flags("tcpflags", cmd, f_tcpflags); 1120 break; 1121 1122 case O_TCPOPTS: 1123 print_flags("tcpoptions", cmd, f_tcpopts); 1124 break; 1125 1126 case O_TCPWIN: 1127 printf(" tcpwin %d", ntohs(cmd->arg1)); 1128 break; 1129 1130 case O_TCPACK: 1131 printf(" tcpack %u", ntohl(cmd32->d[0])); 1132 break; 1133 1134 case O_TCPSEQ: 1135 printf(" tcpseq %u", ntohl(cmd32->d[0])); 1136 break; 1137 1138 case O_UID: 1139 { 1140 struct passwd *pwd = getpwuid(cmd32->d[0]); 1141 1142 if (pwd) 1143 printf(" uid %s", pwd->pw_name); 1144 else 1145 printf(" uid %u", cmd32->d[0]); 1146 } 1147 break; 1148 1149 case O_GID: 1150 { 1151 struct group *grp = getgrgid(cmd32->d[0]); 1152 1153 if (grp) 1154 printf(" gid %s", grp->gr_name); 1155 else 1156 printf(" gid %u", cmd32->d[0]); 1157 } 1158 break; 1159 1160 case O_KEEP_STATE: 1161 printf(" keep-state"); 1162 break; 1163 1164 case O_LIMIT: 1165 { 1166 struct _s_x *p = limit_masks; 1167 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1168 u_int8_t x = c->limit_mask; 1169 char *comma = " "; 1170 1171 printf(" limit"); 1172 for ( ; p->x != 0 ; p++) 1173 if ((x & p->x) == p->x) { 1174 x &= ~p->x; 1175 printf("%s%s", comma, p->s); 1176 comma = ","; 1177 } 1178 printf(" %d", c->conn_limit); 1179 } 1180 break; 1181 1182 default: 1183 printf(" [opcode %d len %d]", 1184 cmd->opcode, cmd->len); 1185 } 1186 } 1187 if (cmd->len & F_OR) { 1188 printf(" or"); 1189 or_block = 1; 1190 } else if (or_block) { 1191 printf(" }"); 1192 or_block = 0; 1193 } 1194 } 1195 show_prerequisites(&flags, HAVE_IP, 0); 1196 1197 printf("\n"); 1198 } 1199 1200 static void 1201 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth) 1202 { 1203 struct protoent *pe; 1204 struct in_addr a; 1205 1206 if (!do_expired) { 1207 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1208 return; 1209 } 1210 1211 printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt, 1212 bcwidth, (uintmax_t)d->bcnt, d->expire); 1213 switch (d->dyn_type) { 1214 case O_LIMIT_PARENT: 1215 printf(" PARENT %d", d->count); 1216 break; 1217 case O_LIMIT: 1218 printf(" LIMIT"); 1219 break; 1220 case O_KEEP_STATE: /* bidir, no mask */ 1221 printf(" STATE"); 1222 break; 1223 } 1224 1225 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL) 1226 printf(" %s", pe->p_name); 1227 else 1228 printf(" proto %u", d->id.u.ip.proto); 1229 1230 a.s_addr = htonl(d->id.u.ip.src_ip); 1231 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port); 1232 1233 a.s_addr = htonl(d->id.u.ip.dst_ip); 1234 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port); 1235 printf("\n"); 1236 } 1237 1238 int 1239 sort_q(const void *pa, const void *pb) 1240 { 1241 int rev = (do_sort < 0); 1242 int field = rev ? -do_sort : do_sort; 1243 long long res = 0; 1244 const struct dn_ioc_flowqueue *a = pa; 1245 const struct dn_ioc_flowqueue *b = pb; 1246 1247 switch (field) { 1248 case 1: /* pkts */ 1249 res = a->len - b->len; 1250 break; 1251 case 2: /* bytes */ 1252 res = a->len_bytes - b->len_bytes; 1253 break; 1254 1255 case 3: /* tot pkts */ 1256 res = a->tot_pkts - b->tot_pkts; 1257 break; 1258 1259 case 4: /* tot bytes */ 1260 res = a->tot_bytes - b->tot_bytes; 1261 break; 1262 } 1263 if (res < 0) 1264 res = -1; 1265 if (res > 0) 1266 res = 1; 1267 return (int)(rev ? res : -res); 1268 } 1269 1270 static void 1271 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) 1272 { 1273 int l; 1274 1275 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1276 fs->flow_mask.u.ip.proto, 1277 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, 1278 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); 1279 if (fs->rq_elements == 0) 1280 return; 1281 1282 printf("BKT Prot ___Source IP/port____ " 1283 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1284 if (do_sort != 0) 1285 heapsort(q, fs->rq_elements, sizeof(*q), sort_q); 1286 for (l = 0; l < fs->rq_elements; l++) { 1287 struct in_addr ina; 1288 struct protoent *pe; 1289 1290 ina.s_addr = htonl(q[l].id.u.ip.src_ip); 1291 printf("%3d ", q[l].hash_slot); 1292 pe = getprotobynumber(q[l].id.u.ip.proto); 1293 if (pe) 1294 printf("%-4s ", pe->p_name); 1295 else 1296 printf("%4u ", q[l].id.u.ip.proto); 1297 printf("%15s/%-5d ", 1298 inet_ntoa(ina), q[l].id.u.ip.src_port); 1299 ina.s_addr = htonl(q[l].id.u.ip.dst_ip); 1300 printf("%15s/%-5d ", 1301 inet_ntoa(ina), q[l].id.u.ip.dst_port); 1302 printf("%4ju %8ju %2u %4u %3u\n", 1303 (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes, 1304 q[l].len, q[l].len_bytes, q[l].drops); 1305 if (verbose) 1306 printf(" S %20ju F %20ju\n", 1307 (uintmax_t)q[l].S, (uintmax_t)q[l].F); 1308 } 1309 } 1310 1311 static void 1312 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) 1313 { 1314 int l; 1315 char qs[30]; 1316 char plr[30]; 1317 char red[90]; /* Display RED parameters */ 1318 1319 l = fs->qsize; 1320 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1321 if (l >= 8192) 1322 sprintf(qs, "%d KB", l / 1024); 1323 else 1324 sprintf(qs, "%d B", l); 1325 } else 1326 sprintf(qs, "%3d sl.", l); 1327 if (fs->plr) 1328 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1329 else 1330 plr[0] = '\0'; 1331 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1332 sprintf(red, 1333 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1334 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1335 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1336 SCALE_VAL(fs->min_th), 1337 SCALE_VAL(fs->max_th), 1338 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1339 else 1340 sprintf(red, "droptail"); 1341 1342 printf("%s %s%s %d queues (%d buckets) %s\n", 1343 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1344 } 1345 1346 static void 1347 list_pipes(void *data, int nbytes, int ac, char *av[]) 1348 { 1349 u_long rulenum; 1350 void *next = data; 1351 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; 1352 struct dn_ioc_flowset *fs; 1353 struct dn_ioc_flowqueue *q; 1354 int l; 1355 1356 if (ac > 0) 1357 rulenum = strtoul(*av++, NULL, 10); 1358 else 1359 rulenum = 0; 1360 for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) { 1361 double b = p->bandwidth; 1362 char buf[30]; 1363 char prefix[80]; 1364 1365 if (p->fs.fs_type != DN_IS_PIPE) 1366 break; /* done with pipes, now queues */ 1367 1368 /* 1369 * compute length, as pipe have variable size 1370 */ 1371 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1372 next = (void *)p + l; 1373 nbytes -= l; 1374 1375 if (rulenum != 0 && rulenum != p->pipe_nr) 1376 continue; 1377 1378 /* 1379 * Print rate 1380 */ 1381 if (b == 0) 1382 sprintf(buf, "unlimited"); 1383 else if (b >= 1000000) 1384 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1385 else if (b >= 1000) 1386 sprintf(buf, "%7.3f Kbit/s", b/1000); 1387 else 1388 sprintf(buf, "%7.3f bit/s ", b); 1389 1390 sprintf(prefix, "%05d: %s %4d ms ", 1391 p->pipe_nr, buf, p->delay); 1392 print_flowset_parms(&p->fs, prefix); 1393 if (verbose) 1394 printf(" V %20ju\n", (uintmax_t)p->V >> MY_M); 1395 1396 q = (struct dn_ioc_flowqueue *)(p+1); 1397 list_queues(&p->fs, q); 1398 } 1399 for (fs = next; nbytes >= sizeof(*fs); fs = next) { 1400 char prefix[80]; 1401 1402 if (fs->fs_type != DN_IS_QUEUE) 1403 break; 1404 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1405 next = (void *)fs + l; 1406 nbytes -= l; 1407 q = (struct dn_ioc_flowqueue *)(fs+1); 1408 sprintf(prefix, "q%05d: weight %d pipe %d ", 1409 fs->fs_nr, fs->weight, fs->parent_nr); 1410 print_flowset_parms(fs, prefix); 1411 list_queues(fs, q); 1412 } 1413 } 1414 1415 /* 1416 * This one handles all set-related commands 1417 * ipfw set { show | enable | disable } 1418 * ipfw set swap X Y 1419 * ipfw set move X to Y 1420 * ipfw set move rule X to Y 1421 */ 1422 static void 1423 sets_handler(int ac, char *av[]) 1424 { 1425 u_int32_t set_disable, masks[2]; 1426 int i, nbytes; 1427 u_int16_t rulenum; 1428 u_int8_t cmd, new_set; 1429 1430 ac--; 1431 av++; 1432 1433 if (!ac) 1434 errx(EX_USAGE, "set needs command"); 1435 if (!strncmp(*av, "show", strlen(*av)) ) { 1436 void *data; 1437 char *msg; 1438 1439 nbytes = sizeof(struct ipfw_ioc_rule); 1440 if ((data = malloc(nbytes)) == NULL) 1441 err(EX_OSERR, "malloc"); 1442 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1443 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1444 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable; 1445 1446 for (i = 0, msg = "disable" ; i < 31; i++) 1447 if ( (set_disable & (1<<i))) { 1448 printf("%s %d", msg, i); 1449 msg = ""; 1450 } 1451 msg = (set_disable) ? " enable" : "enable"; 1452 for (i = 0; i < 31; i++) 1453 if ( !(set_disable & (1<<i))) { 1454 printf("%s %d", msg, i); 1455 msg = ""; 1456 } 1457 printf("\n"); 1458 } else if (!strncmp(*av, "swap", strlen(*av))) { 1459 ac--; av++; 1460 if (ac != 2) 1461 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1462 rulenum = atoi(av[0]); 1463 new_set = atoi(av[1]); 1464 if (!isdigit(*(av[0])) || rulenum > 30) 1465 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1466 if (!isdigit(*(av[1])) || new_set > 30) 1467 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1468 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1469 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1470 masks, sizeof(u_int32_t)); 1471 } else if (!strncmp(*av, "move", strlen(*av))) { 1472 ac--; av++; 1473 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1474 cmd = 2; 1475 ac--; av++; 1476 } else 1477 cmd = 3; 1478 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1479 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1480 rulenum = atoi(av[0]); 1481 new_set = atoi(av[2]); 1482 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1483 (cmd == 2 && rulenum == 65535) ) 1484 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1485 if (!isdigit(*(av[2])) || new_set > 30) 1486 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1487 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1488 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1489 masks, sizeof(u_int32_t)); 1490 } else if (!strncmp(*av, "disable", strlen(*av)) || 1491 !strncmp(*av, "enable", strlen(*av)) ) { 1492 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1493 1494 ac--; av++; 1495 masks[0] = masks[1] = 0; 1496 1497 while (ac) { 1498 if (isdigit(**av)) { 1499 i = atoi(*av); 1500 if (i < 0 || i > 30) 1501 errx(EX_DATAERR, 1502 "invalid set number %d\n", i); 1503 masks[which] |= (1<<i); 1504 } else if (!strncmp(*av, "disable", strlen(*av))) 1505 which = 0; 1506 else if (!strncmp(*av, "enable", strlen(*av))) 1507 which = 1; 1508 else 1509 errx(EX_DATAERR, 1510 "invalid set command %s\n", *av); 1511 av++; ac--; 1512 } 1513 if ( (masks[0] & masks[1]) != 0 ) 1514 errx(EX_DATAERR, 1515 "cannot enable and disable the same set\n"); 1516 1517 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1518 if (i) 1519 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1520 } else 1521 errx(EX_USAGE, "invalid set command %s\n", *av); 1522 } 1523 1524 static void 1525 sysctl_handler(int ac, char *av[], int which) 1526 { 1527 ac--; 1528 av++; 1529 1530 if (*av == NULL) { 1531 warnx("missing keyword to enable/disable\n"); 1532 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1533 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1534 &which, sizeof(which)); 1535 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1536 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1537 &which, sizeof(which)); 1538 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1539 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1540 &which, sizeof(which)); 1541 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1542 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1543 &which, sizeof(which)); 1544 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1545 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1546 &which, sizeof(which)); 1547 } else { 1548 warnx("unrecognize enable/disable keyword: %s\n", *av); 1549 } 1550 } 1551 1552 static void 1553 list(int ac, char *av[]) 1554 { 1555 struct ipfw_ioc_rule *r; 1556 struct ipfw_ioc_state *dynrules, *d; 1557 1558 void *data = NULL; 1559 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1560 int exitval = EX_OK; 1561 int lac; 1562 char **lav; 1563 u_long rnum; 1564 char *endptr; 1565 int seen = 0; 1566 1567 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1568 int nalloc = 1024; /* start somewhere... */ 1569 1570 ac--; 1571 av++; 1572 1573 /* get rules or pipes from kernel, resizing array as necessary */ 1574 nbytes = nalloc; 1575 1576 while (nbytes >= nalloc) { 1577 nalloc = nalloc * 2 + 200; 1578 nbytes = nalloc; 1579 if ((data = realloc(data, nbytes)) == NULL) 1580 err(EX_OSERR, "realloc"); 1581 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1582 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1583 do_pipe ? "DUMMYNET" : "FW"); 1584 } 1585 1586 if (do_pipe) { 1587 list_pipes(data, nbytes, ac, av); 1588 goto done; 1589 } 1590 1591 /* 1592 * Count static rules. 1593 */ 1594 r = data; 1595 nstat = r->static_count; 1596 1597 /* 1598 * Count dynamic rules. This is easier as they have 1599 * fixed size. 1600 */ 1601 dynrules = (struct ipfw_ioc_state *)((void *)r + r->static_len); 1602 ndyn = (nbytes - r->static_len) / sizeof(*dynrules); 1603 1604 /* if showing stats, figure out column widths ahead of time */ 1605 bcwidth = pcwidth = 0; 1606 if (do_acct) { 1607 for (n = 0, r = data; n < nstat; 1608 n++, r = (void *)r + IOC_RULESIZE(r)) { 1609 /* packet counter */ 1610 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt); 1611 if (width > pcwidth) 1612 pcwidth = width; 1613 1614 /* byte counter */ 1615 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt); 1616 if (width > bcwidth) 1617 bcwidth = width; 1618 } 1619 } 1620 if (do_dynamic && ndyn) { 1621 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1622 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt); 1623 if (width > pcwidth) 1624 pcwidth = width; 1625 1626 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt); 1627 if (width > bcwidth) 1628 bcwidth = width; 1629 } 1630 } 1631 /* if no rule numbers were specified, list all rules */ 1632 if (ac == 0) { 1633 for (n = 0, r = data; n < nstat; 1634 n++, r = (void *)r + IOC_RULESIZE(r) ) 1635 show_ipfw(r, pcwidth, bcwidth); 1636 1637 if (do_dynamic && ndyn) { 1638 printf("## Dynamic rules (%d):\n", ndyn); 1639 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1640 show_dyn_ipfw(d, pcwidth, bcwidth); 1641 } 1642 goto done; 1643 } 1644 1645 /* display specific rules requested on command line */ 1646 1647 for (lac = ac, lav = av; lac != 0; lac--) { 1648 /* convert command line rule # */ 1649 rnum = strtoul(*lav++, &endptr, 10); 1650 if (*endptr) { 1651 exitval = EX_USAGE; 1652 warnx("invalid rule number: %s", *(lav - 1)); 1653 continue; 1654 } 1655 for (n = seen = 0, r = data; n < nstat; 1656 n++, r = (void *)r + IOC_RULESIZE(r) ) { 1657 if (r->rulenum > rnum) 1658 break; 1659 if (r->rulenum == rnum) { 1660 show_ipfw(r, pcwidth, bcwidth); 1661 seen = 1; 1662 } 1663 } 1664 if (!seen) { 1665 /* give precedence to other error(s) */ 1666 if (exitval == EX_OK) 1667 exitval = EX_UNAVAILABLE; 1668 warnx("rule %lu does not exist", rnum); 1669 } 1670 } 1671 1672 if (do_dynamic && ndyn) { 1673 printf("## Dynamic rules:\n"); 1674 for (lac = ac, lav = av; lac != 0; lac--) { 1675 rnum = strtoul(*lav++, &endptr, 10); 1676 if (*endptr) 1677 /* already warned */ 1678 continue; 1679 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1680 if (d->rulenum > rnum) 1681 break; 1682 if (d->rulenum == rnum) 1683 show_dyn_ipfw(d, pcwidth, bcwidth); 1684 } 1685 } 1686 } 1687 1688 ac = 0; 1689 1690 done: 1691 free(data); 1692 1693 if (exitval != EX_OK) 1694 exit(exitval); 1695 } 1696 1697 static void 1698 show_usage(void) 1699 { 1700 fprintf(stderr, "usage: ipfw [options]\n" 1701 " add [number] rule\n" 1702 " pipe number config [pipeconfig]\n" 1703 " queue number config [queueconfig]\n" 1704 " [pipe] flush\n" 1705 " [pipe] delete number ...\n" 1706 " [pipe] {list|show} [number ...]\n" 1707 " {zero|resetlog} [number ...]\n" 1708 "do \"ipfw -h\" or see ipfw manpage for details\n" 1709 ); 1710 1711 exit(EX_USAGE); 1712 } 1713 1714 static void 1715 help(void) 1716 { 1717 1718 fprintf(stderr, "ipfw syntax summary:\n" 1719 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1720 "ipfw {pipe|queue} N config BODY\n" 1721 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1722 "\n" 1723 "RULE: [1..] [PROB] BODY\n" 1724 "RULENUM: INTEGER(1..65534)\n" 1725 "PROB: prob REAL(0..1)\n" 1726 "BODY: check-state [LOG] (no body) |\n" 1727 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1728 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1729 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1730 "ADDR: [ MAC dst src ether_type ] \n" 1731 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1732 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1733 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1734 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1735 ); 1736 exit(0); 1737 } 1738 1739 1740 static int 1741 lookup_host (char *host, struct in_addr *ipaddr) 1742 { 1743 struct hostent *he; 1744 1745 if (!inet_aton(host, ipaddr)) { 1746 if ((he = gethostbyname(host)) == NULL) 1747 return(-1); 1748 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1749 } 1750 return(0); 1751 } 1752 1753 /* 1754 * fills the addr and mask fields in the instruction as appropriate from av. 1755 * Update length as appropriate. 1756 * The following formats are allowed: 1757 * any matches any IP. Actually returns an empty instruction. 1758 * me returns O_IP_*_ME 1759 * 1.2.3.4 single IP address 1760 * 1.2.3.4:5.6.7.8 address:mask 1761 * 1.2.3.4/24 address/mask 1762 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1763 */ 1764 static void 1765 fill_ip(ipfw_insn_ip *cmd, char *av) 1766 { 1767 char *p = NULL, md = 0; 1768 u_int32_t i; 1769 1770 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1771 1772 if (!strncmp(av, "any", strlen(av))) 1773 return; 1774 1775 if (!strncmp(av, "me", strlen(av))) { 1776 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1777 return; 1778 } 1779 1780 p = strchr(av, '/'); 1781 if (!p) 1782 p = strchr(av, ':'); 1783 if (p) { 1784 md = *p; 1785 *p++ = '\0'; 1786 } 1787 1788 if (lookup_host(av, &cmd->addr) != 0) 1789 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1790 switch (md) { 1791 case ':': 1792 if (!inet_aton(p, &cmd->mask)) 1793 errx(EX_DATAERR, "bad netmask ``%s''", p); 1794 break; 1795 case '/': 1796 i = atoi(p); 1797 if (i == 0) 1798 cmd->mask.s_addr = htonl(0); 1799 else if (i > 32) 1800 errx(EX_DATAERR, "bad width ``%s''", p); 1801 else 1802 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1803 break; 1804 default: 1805 cmd->mask.s_addr = htonl(~0); 1806 break; 1807 } 1808 cmd->addr.s_addr &= cmd->mask.s_addr; 1809 /* 1810 * now look if we have a set of addresses. They are stored as follows: 1811 * arg1 is the set size (powers of 2, 2..256) 1812 * addr is the base address IN HOST FORMAT 1813 * mask.. is an array of u_int32_t with bits set. 1814 */ 1815 if (p) 1816 p = strchr(p, '{'); 1817 if (p) { /* fetch addresses */ 1818 u_int32_t *d; 1819 int low, high; 1820 int i = contigmask((u_char *)&(cmd->mask), 32); 1821 1822 if (i < 24 || i > 31) { 1823 fprintf(stderr, "invalid set with mask %d\n", 1824 i); 1825 exit(0); 1826 } 1827 cmd->o.arg1 = 1<<(32-i); 1828 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1829 d = (u_int32_t *)&cmd->mask; 1830 cmd->o.opcode = O_IP_DST_SET; /* default */ 1831 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1832 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1833 d[i] = 0; /* clear masks */ 1834 1835 av = p+1; 1836 low = cmd->addr.s_addr & 0xff; 1837 high = low + cmd->o.arg1 - 1; 1838 while (isdigit(*av)) { 1839 char *s; 1840 u_int16_t a = strtol(av, &s, 0); 1841 1842 if (s == av) /* no parameter */ 1843 break; 1844 if (a < low || a > high) { 1845 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1846 a, low, high); 1847 exit(0); 1848 } 1849 a -= low; 1850 d[ a/32] |= 1<<(a & 31); 1851 if (*s != ',') 1852 break; 1853 av = s+1; 1854 } 1855 return; 1856 } 1857 1858 if (cmd->mask.s_addr == 0) { /* any */ 1859 if (cmd->o.len & F_NOT) 1860 errx(EX_DATAERR, "not any never matches"); 1861 else /* useless, nuke it */ 1862 return; 1863 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1864 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1865 else /* addr/mask */ 1866 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1867 } 1868 1869 1870 /* 1871 * helper function to process a set of flags and set bits in the 1872 * appropriate masks. 1873 */ 1874 static void 1875 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1876 struct _s_x *flags, char *p) 1877 { 1878 u_int8_t set=0, clear=0; 1879 1880 while (p && *p) { 1881 char *q; /* points to the separator */ 1882 int val; 1883 u_int8_t *which; /* mask we are working on */ 1884 1885 if (*p == '!') { 1886 p++; 1887 which = &clear; 1888 } else 1889 which = &set; 1890 q = strchr(p, ','); 1891 if (q) 1892 *q++ = '\0'; 1893 val = match_token(flags, p); 1894 if (val <= 0) 1895 errx(EX_DATAERR, "invalid flag %s", p); 1896 *which |= (u_int8_t)val; 1897 p = q; 1898 } 1899 cmd->opcode = opcode; 1900 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 1901 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 1902 } 1903 1904 1905 static void 1906 delete(int ac, char *av[]) 1907 { 1908 u_int32_t rulenum; 1909 struct dn_ioc_pipe pipe; 1910 int i; 1911 int exitval = EX_OK; 1912 int do_set = 0; 1913 1914 memset(&pipe, 0, sizeof pipe); 1915 1916 av++; ac--; 1917 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 1918 do_set = 1; /* delete set */ 1919 ac--; av++; 1920 } 1921 1922 /* Rule number */ 1923 while (ac && isdigit(**av)) { 1924 i = atoi(*av); av++; ac--; 1925 if (do_pipe) { 1926 if (do_pipe == 1) 1927 pipe.pipe_nr = i; 1928 else 1929 pipe.fs.fs_nr = i; 1930 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 1931 &pipe, sizeof pipe); 1932 if (i) { 1933 exitval = 1; 1934 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 1935 do_pipe == 1 ? pipe.pipe_nr : 1936 pipe.fs.fs_nr); 1937 } 1938 } else { 1939 rulenum = (i & 0xffff) | (do_set << 24); 1940 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 1941 sizeof rulenum); 1942 if (i) { 1943 exitval = EX_UNAVAILABLE; 1944 warn("rule %u: setsockopt(IP_FW_DEL)", 1945 rulenum); 1946 } 1947 } 1948 } 1949 if (exitval != EX_OK) 1950 exit(exitval); 1951 } 1952 1953 1954 /* 1955 * fill the interface structure. We do not check the name as we can 1956 * create interfaces dynamically, so checking them at insert time 1957 * makes relatively little sense. 1958 * Interface names containing '*', '?', or '[' are assumed to be shell 1959 * patterns which match interfaces. 1960 */ 1961 static void 1962 fill_iface(ipfw_insn_if *cmd, char *arg) 1963 { 1964 cmd->name[0] = '\0'; 1965 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 1966 1967 /* Parse the interface or address */ 1968 if (!strcmp(arg, "any")) 1969 cmd->o.len = 0; /* effectively ignore this command */ 1970 else if (!isdigit(*arg)) { 1971 strlcpy(cmd->name, arg, sizeof(cmd->name)); 1972 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 1973 } else if (!inet_aton(arg, &cmd->p.ip)) 1974 errx(EX_DATAERR, "bad ip address ``%s''", arg); 1975 } 1976 1977 static unsigned long 1978 getbw(const char *str, u_short *flags, int kb) 1979 { 1980 char *end; 1981 unsigned long val; 1982 int inbytes = 0; 1983 1984 val = strtoul(str, &end, 0); 1985 if (*end == 'k' || *end == 'K') { 1986 ++end; 1987 val *= kb; 1988 } else if (*end == 'm' || *end == 'M') { 1989 ++end; 1990 val *= kb * kb; 1991 } 1992 1993 /* 1994 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 1995 * trailer assume bits. 1996 */ 1997 if (strncasecmp(end, "bit", 3) == 0) { 1998 ; 1999 } else if (strncasecmp(end, "byte", 4) == 0) { 2000 inbytes = 1; 2001 } else if (*end == 'b') { 2002 ; 2003 } else if (*end == 'B') { 2004 inbytes = 1; 2005 } 2006 2007 /* 2008 * Return in bits if flags is NULL, else flag bits 2009 * or bytes in flags and return the unconverted value. 2010 */ 2011 if (inbytes && flags) 2012 *flags |= DN_QSIZE_IS_BYTES; 2013 else if (inbytes && flags == NULL) 2014 val *= 8; 2015 return(val); 2016 } 2017 2018 /* 2019 * the following macro returns an error message if we run out of 2020 * arguments. 2021 */ 2022 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2023 2024 static void 2025 config_pipe(int ac, char **av) 2026 { 2027 struct dn_ioc_pipe pipe; 2028 int i; 2029 char *end; 2030 u_int32_t a; 2031 void *par = NULL; 2032 2033 memset(&pipe, 0, sizeof pipe); 2034 2035 av++; ac--; 2036 /* Pipe number */ 2037 if (ac && isdigit(**av)) { 2038 i = atoi(*av); av++; ac--; 2039 if (do_pipe == 1) 2040 pipe.pipe_nr = i; 2041 else 2042 pipe.fs.fs_nr = i; 2043 } 2044 while (ac > 0) { 2045 double d; 2046 int tok = match_token(dummynet_params, *av); 2047 ac--; av++; 2048 2049 switch(tok) { 2050 case TOK_NOERROR: 2051 pipe.fs.flags_fs |= DN_NOERROR; 2052 break; 2053 2054 case TOK_PLR: 2055 NEED1("plr needs argument 0..1\n"); 2056 d = strtod(av[0], NULL); 2057 if (d > 1) 2058 d = 1; 2059 else if (d < 0) 2060 d = 0; 2061 pipe.fs.plr = (int)(d*0x7fffffff); 2062 ac--; av++; 2063 break; 2064 2065 case TOK_QUEUE: 2066 NEED1("queue needs queue size\n"); 2067 end = NULL; 2068 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2069 ac--; av++; 2070 break; 2071 2072 case TOK_BUCKETS: 2073 NEED1("buckets needs argument\n"); 2074 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2075 ac--; av++; 2076 break; 2077 2078 case TOK_MASK: 2079 NEED1("mask needs mask specifier\n"); 2080 /* 2081 * per-flow queue, mask is dst_ip, dst_port, 2082 * src_ip, src_port, proto measured in bits 2083 */ 2084 par = NULL; 2085 2086 pipe.fs.flow_mask.type = ETHERTYPE_IP; 2087 pipe.fs.flow_mask.u.ip.dst_ip = 0; 2088 pipe.fs.flow_mask.u.ip.src_ip = 0; 2089 pipe.fs.flow_mask.u.ip.dst_port = 0; 2090 pipe.fs.flow_mask.u.ip.src_port = 0; 2091 pipe.fs.flow_mask.u.ip.proto = 0; 2092 end = NULL; 2093 2094 while (ac >= 1) { 2095 u_int32_t *p32 = NULL; 2096 u_int16_t *p16 = NULL; 2097 2098 tok = match_token(dummynet_params, *av); 2099 ac--; av++; 2100 switch(tok) { 2101 case TOK_ALL: 2102 /* 2103 * special case, all bits significant 2104 */ 2105 pipe.fs.flow_mask.u.ip.dst_ip = ~0; 2106 pipe.fs.flow_mask.u.ip.src_ip = ~0; 2107 pipe.fs.flow_mask.u.ip.dst_port = ~0; 2108 pipe.fs.flow_mask.u.ip.src_port = ~0; 2109 pipe.fs.flow_mask.u.ip.proto = ~0; 2110 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2111 goto end_mask; 2112 2113 case TOK_DSTIP: 2114 p32 = &pipe.fs.flow_mask.u.ip.dst_ip; 2115 break; 2116 2117 case TOK_SRCIP: 2118 p32 = &pipe.fs.flow_mask.u.ip.src_ip; 2119 break; 2120 2121 case TOK_DSTPORT: 2122 p16 = &pipe.fs.flow_mask.u.ip.dst_port; 2123 break; 2124 2125 case TOK_SRCPORT: 2126 p16 = &pipe.fs.flow_mask.u.ip.src_port; 2127 break; 2128 2129 case TOK_PROTO: 2130 break; 2131 2132 default: 2133 ac++; av--; /* backtrack */ 2134 goto end_mask; 2135 } 2136 if (ac < 1) 2137 errx(EX_USAGE, "mask: value missing"); 2138 if (*av[0] == '/') { 2139 a = strtoul(av[0]+1, &end, 0); 2140 a = (a == 32) ? ~0 : (1 << a) - 1; 2141 } else 2142 a = strtoul(av[0], &end, 0); 2143 if (p32 != NULL) 2144 *p32 = a; 2145 else if (p16 != NULL) { 2146 if (a > 65535) 2147 errx(EX_DATAERR, 2148 "mask: must be 16 bit"); 2149 *p16 = (u_int16_t)a; 2150 } else { 2151 if (a > 255) 2152 errx(EX_DATAERR, 2153 "mask: must be 8 bit"); 2154 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; 2155 } 2156 if (a != 0) 2157 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2158 ac--; av++; 2159 } /* end while, config masks */ 2160 end_mask: 2161 break; 2162 2163 case TOK_RED: 2164 case TOK_GRED: 2165 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2166 pipe.fs.flags_fs |= DN_IS_RED; 2167 if (tok == TOK_GRED) 2168 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2169 /* 2170 * the format for parameters is w_q/min_th/max_th/max_p 2171 */ 2172 if ((end = strsep(&av[0], "/"))) { 2173 double w_q = strtod(end, NULL); 2174 if (w_q > 1 || w_q <= 0) 2175 errx(EX_DATAERR, "0 < w_q <= 1"); 2176 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2177 } 2178 if ((end = strsep(&av[0], "/"))) { 2179 pipe.fs.min_th = strtoul(end, &end, 0); 2180 if (*end == 'K' || *end == 'k') 2181 pipe.fs.min_th *= 1024; 2182 } 2183 if ((end = strsep(&av[0], "/"))) { 2184 pipe.fs.max_th = strtoul(end, &end, 0); 2185 if (*end == 'K' || *end == 'k') 2186 pipe.fs.max_th *= 1024; 2187 } 2188 if ((end = strsep(&av[0], "/"))) { 2189 double max_p = strtod(end, NULL); 2190 if (max_p > 1 || max_p <= 0) 2191 errx(EX_DATAERR, "0 < max_p <= 1"); 2192 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2193 } 2194 ac--; av++; 2195 break; 2196 2197 case TOK_DROPTAIL: 2198 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2199 break; 2200 2201 case TOK_BW: 2202 NEED1("bw needs bandwidth\n"); 2203 if (do_pipe != 1) 2204 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2205 /* 2206 * set bandwidth value 2207 */ 2208 pipe.bandwidth = getbw(av[0], NULL, 1000); 2209 if (pipe.bandwidth < 0) 2210 errx(EX_DATAERR, "bandwidth too large"); 2211 ac--; av++; 2212 break; 2213 2214 case TOK_DELAY: 2215 if (do_pipe != 1) 2216 errx(EX_DATAERR, "delay only valid for pipes"); 2217 NEED1("delay needs argument 0..10000ms\n"); 2218 pipe.delay = strtoul(av[0], NULL, 0); 2219 ac--; av++; 2220 break; 2221 2222 case TOK_WEIGHT: 2223 if (do_pipe == 1) 2224 errx(EX_DATAERR,"weight only valid for queues"); 2225 NEED1("weight needs argument 0..100\n"); 2226 pipe.fs.weight = strtoul(av[0], &end, 0); 2227 ac--; av++; 2228 break; 2229 2230 case TOK_PIPE: 2231 if (do_pipe == 1) 2232 errx(EX_DATAERR,"pipe only valid for queues"); 2233 NEED1("pipe needs pipe_number\n"); 2234 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2235 ac--; av++; 2236 break; 2237 2238 default: 2239 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2240 } 2241 } 2242 if (do_pipe == 1) { 2243 if (pipe.pipe_nr == 0) 2244 errx(EX_DATAERR, "pipe_nr must be > 0"); 2245 if (pipe.delay > 10000) 2246 errx(EX_DATAERR, "delay must be < 10000"); 2247 } else { /* do_pipe == 2, queue */ 2248 if (pipe.fs.parent_nr == 0) 2249 errx(EX_DATAERR, "pipe must be > 0"); 2250 if (pipe.fs.weight >100) 2251 errx(EX_DATAERR, "weight must be <= 100"); 2252 } 2253 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2254 if (pipe.fs.qsize > 1024*1024) 2255 errx(EX_DATAERR, "queue size must be < 1MB"); 2256 } else { 2257 if (pipe.fs.qsize > 100) 2258 errx(EX_DATAERR, "2 <= queue size <= 100"); 2259 } 2260 if (pipe.fs.flags_fs & DN_IS_RED) { 2261 size_t len; 2262 int lookup_depth, avg_pkt_size; 2263 double s, idle, weight, w_q; 2264 int clock_hz; 2265 int t; 2266 2267 if (pipe.fs.min_th >= pipe.fs.max_th) 2268 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2269 pipe.fs.min_th, pipe.fs.max_th); 2270 if (pipe.fs.max_th == 0) 2271 errx(EX_DATAERR, "max_th must be > 0"); 2272 2273 len = sizeof(int); 2274 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2275 &lookup_depth, &len, NULL, 0) == -1) 2276 2277 errx(1, "sysctlbyname(\"%s\")", 2278 "net.inet.ip.dummynet.red_lookup_depth"); 2279 if (lookup_depth == 0) 2280 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2281 " must be greater than zero"); 2282 2283 len = sizeof(int); 2284 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2285 &avg_pkt_size, &len, NULL, 0) == -1) 2286 2287 errx(1, "sysctlbyname(\"%s\")", 2288 "net.inet.ip.dummynet.red_avg_pkt_size"); 2289 if (avg_pkt_size == 0) 2290 errx(EX_DATAERR, 2291 "net.inet.ip.dummynet.red_avg_pkt_size must" 2292 " be greater than zero"); 2293 2294 len = sizeof(clock_hz); 2295 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, 2296 NULL, 0) == -1) { 2297 errx(1, "sysctlbyname(\"%s\")", 2298 "net.inet.ip.dummynet.hz"); 2299 } 2300 2301 /* 2302 * Ticks needed for sending a medium-sized packet. 2303 * Unfortunately, when we are configuring a WF2Q+ queue, we 2304 * do not have bandwidth information, because that is stored 2305 * in the parent pipe, and also we have multiple queues 2306 * competing for it. So we set s=0, which is not very 2307 * correct. But on the other hand, why do we want RED with 2308 * WF2Q+ ? 2309 */ 2310 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2311 s = 0; 2312 else 2313 s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; 2314 2315 /* 2316 * max idle time (in ticks) before avg queue size becomes 0. 2317 * NOTA: (3/w_q) is approx the value x so that 2318 * (1-w_q)^x < 10^-3. 2319 */ 2320 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2321 idle = s * 3. / w_q; 2322 pipe.fs.lookup_step = (int)idle / lookup_depth; 2323 if (!pipe.fs.lookup_step) 2324 pipe.fs.lookup_step = 1; 2325 weight = 1 - w_q; 2326 for (t = pipe.fs.lookup_step; t > 0; --t) 2327 weight *= weight; 2328 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2329 } 2330 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2331 sizeof pipe); 2332 if (i) 2333 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2334 } 2335 2336 static void 2337 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2338 { 2339 int i, l; 2340 2341 for (i=0; i<6; i++) 2342 addr[i] = mask[i] = 0; 2343 if (!strcmp(p, "any")) 2344 return; 2345 2346 for (i=0; *p && i<6;i++, p++) { 2347 addr[i] = strtol(p, &p, 16); 2348 if (*p != ':') /* we start with the mask */ 2349 break; 2350 } 2351 if (*p == '/') { /* mask len */ 2352 l = strtol(p+1, &p, 0); 2353 for (i=0; l>0; l -=8, i++) 2354 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2355 } else if (*p == '&') { /* mask */ 2356 for (i=0, p++; *p && i<6;i++, p++) { 2357 mask[i] = strtol(p, &p, 16); 2358 if (*p != ':') 2359 break; 2360 } 2361 } else if (*p == '\0') { 2362 for (i=0; i<6; i++) 2363 mask[i] = 0xff; 2364 } 2365 for (i=0; i<6; i++) 2366 addr[i] &= mask[i]; 2367 } 2368 2369 /* 2370 * helper function, updates the pointer to cmd with the length 2371 * of the current command, and also cleans up the first word of 2372 * the new command in case it has been clobbered before. 2373 */ 2374 static ipfw_insn * 2375 next_cmd(ipfw_insn *cmd) 2376 { 2377 cmd += F_LEN(cmd); 2378 bzero(cmd, sizeof(*cmd)); 2379 return cmd; 2380 } 2381 2382 /* 2383 * A function to fill simple commands of size 1. 2384 * Existing flags are preserved. 2385 */ 2386 static void 2387 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2388 { 2389 cmd->opcode = opcode; 2390 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2391 cmd->arg1 = arg; 2392 } 2393 2394 /* 2395 * Fetch and add the MAC address and type, with masks. This generates one or 2396 * two microinstructions, and returns the pointer to the last one. 2397 */ 2398 static ipfw_insn * 2399 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2400 { 2401 ipfw_insn_mac *mac; 2402 2403 if (ac < 2) 2404 errx(EX_DATAERR, "MAC dst src"); 2405 2406 cmd->opcode = O_MACADDR2; 2407 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2408 2409 mac = (ipfw_insn_mac *)cmd; 2410 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2411 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2412 return cmd; 2413 } 2414 2415 static ipfw_insn * 2416 add_mactype(ipfw_insn *cmd, int ac, char *av) 2417 { 2418 if (ac < 1) 2419 errx(EX_DATAERR, "missing MAC type"); 2420 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2421 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2422 cmd->opcode = O_MAC_TYPE; 2423 return cmd; 2424 } else 2425 return NULL; 2426 } 2427 2428 static ipfw_insn * 2429 add_proto(ipfw_insn *cmd, char *av) 2430 { 2431 struct protoent *pe; 2432 u_char proto = 0; 2433 2434 if (!strncmp(av, "all", strlen(av))) 2435 ; /* same as "ip" */ 2436 else if ((proto = atoi(av)) > 0) 2437 ; /* all done! */ 2438 else if ((pe = getprotobyname(av)) != NULL) 2439 proto = pe->p_proto; 2440 else 2441 return NULL; 2442 if (proto != IPPROTO_IP) 2443 fill_cmd(cmd, O_PROTO, 0, proto); 2444 return cmd; 2445 } 2446 2447 static ipfw_insn * 2448 add_srcip(ipfw_insn *cmd, char *av) 2449 { 2450 fill_ip((ipfw_insn_ip *)cmd, av); 2451 if (cmd->opcode == O_IP_DST_SET) /* set */ 2452 cmd->opcode = O_IP_SRC_SET; 2453 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2454 cmd->opcode = O_IP_SRC_ME; 2455 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2456 cmd->opcode = O_IP_SRC; 2457 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2458 cmd->opcode = O_IP_SRC_MASK; 2459 return cmd; 2460 } 2461 2462 static ipfw_insn * 2463 add_dstip(ipfw_insn *cmd, char *av) 2464 { 2465 fill_ip((ipfw_insn_ip *)cmd, av); 2466 if (cmd->opcode == O_IP_DST_SET) /* set */ 2467 ; 2468 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2469 cmd->opcode = O_IP_DST_ME; 2470 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2471 cmd->opcode = O_IP_DST; 2472 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2473 cmd->opcode = O_IP_DST_MASK; 2474 return cmd; 2475 } 2476 2477 static ipfw_insn * 2478 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2479 { 2480 if (!strncmp(av, "any", strlen(av))) { 2481 return NULL; 2482 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2483 /* XXX todo: check that we have a protocol with ports */ 2484 cmd->opcode = opcode; 2485 return cmd; 2486 } 2487 return NULL; 2488 } 2489 2490 /* 2491 * Parse arguments and assemble the microinstructions which make up a rule. 2492 * Rules are added into the 'rulebuf' and then copied in the correct order 2493 * into the actual rule. 2494 * 2495 * The syntax for a rule starts with the action, followed by an 2496 * optional log action, and the various match patterns. 2497 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2498 * (generated if the rule includes a keep-state option), then the 2499 * various match patterns, the "log" action, and the actual action. 2500 * 2501 */ 2502 static void 2503 add(int ac, char *av[]) 2504 { 2505 /* 2506 * rules are added into the 'rulebuf' and then copied in 2507 * the correct order into the actual rule. 2508 * Some things that need to go out of order (prob, action etc.) 2509 * go into actbuf[]. 2510 */ 2511 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX]; 2512 static uint32_t actbuf[IPFW_RULE_SIZE_MAX]; 2513 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX]; 2514 2515 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2516 ipfw_insn *first_cmd; /* first match pattern */ 2517 2518 struct ipfw_ioc_rule *rule; 2519 2520 /* 2521 * various flags used to record that we entered some fields. 2522 */ 2523 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2524 2525 int i; 2526 2527 int open_par = 0; /* open parenthesis ( */ 2528 2529 /* proto is here because it is used to fetch ports */ 2530 u_char proto = IPPROTO_IP; /* default protocol */ 2531 2532 double match_prob = 1; /* match probability, default is always match */ 2533 2534 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2535 bzero(cmdbuf, sizeof(cmdbuf)); 2536 bzero(rulebuf, sizeof(rulebuf)); 2537 2538 rule = (struct ipfw_ioc_rule *)rulebuf; 2539 cmd = (ipfw_insn *)cmdbuf; 2540 action = (ipfw_insn *)actbuf; 2541 2542 av++; ac--; 2543 2544 /* [rule N] -- Rule number optional */ 2545 if (ac && isdigit(**av)) { 2546 rule->rulenum = atoi(*av); 2547 av++; 2548 ac--; 2549 } 2550 2551 /* [set N] -- set number (0..30), optional */ 2552 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2553 int set = strtoul(av[1], NULL, 10); 2554 if (set < 0 || set > 30) 2555 errx(EX_DATAERR, "illegal set %s", av[1]); 2556 rule->set = set; 2557 av += 2; ac -= 2; 2558 } 2559 2560 /* [prob D] -- match probability, optional */ 2561 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2562 match_prob = strtod(av[1], NULL); 2563 2564 if (match_prob <= 0 || match_prob > 1) 2565 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2566 av += 2; ac -= 2; 2567 } 2568 2569 /* action -- mandatory */ 2570 NEED1("missing action"); 2571 i = match_token(rule_actions, *av); 2572 ac--; av++; 2573 action->len = 1; /* default */ 2574 switch(i) { 2575 case TOK_CHECKSTATE: 2576 have_state = action; 2577 action->opcode = O_CHECK_STATE; 2578 break; 2579 2580 case TOK_ACCEPT: 2581 action->opcode = O_ACCEPT; 2582 break; 2583 2584 case TOK_DENY: 2585 action->opcode = O_DENY; 2586 action->arg1 = 0; 2587 break; 2588 2589 case TOK_REJECT: 2590 action->opcode = O_REJECT; 2591 action->arg1 = ICMP_UNREACH_HOST; 2592 break; 2593 2594 case TOK_RESET: 2595 action->opcode = O_REJECT; 2596 action->arg1 = ICMP_REJECT_RST; 2597 break; 2598 2599 case TOK_UNREACH: 2600 action->opcode = O_REJECT; 2601 NEED1("missing reject code"); 2602 fill_reject_code(&action->arg1, *av); 2603 ac--; av++; 2604 break; 2605 2606 case TOK_COUNT: 2607 action->opcode = O_COUNT; 2608 break; 2609 2610 case TOK_QUEUE: 2611 case TOK_PIPE: 2612 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2613 case TOK_SKIPTO: 2614 if (i == TOK_QUEUE) 2615 action->opcode = O_QUEUE; 2616 else if (i == TOK_PIPE) 2617 action->opcode = O_PIPE; 2618 else if (i == TOK_SKIPTO) 2619 action->opcode = O_SKIPTO; 2620 NEED1("missing skipto/pipe/queue number"); 2621 action->arg1 = strtoul(*av, NULL, 10); 2622 av++; ac--; 2623 break; 2624 2625 case TOK_DIVERT: 2626 case TOK_TEE: 2627 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2628 NEED1("missing divert/tee port"); 2629 action->arg1 = strtoul(*av, NULL, 0); 2630 if (action->arg1 == 0) { 2631 struct servent *s; 2632 setservent(1); 2633 s = getservbyname(av[0], "divert"); 2634 if (s != NULL) 2635 action->arg1 = ntohs(s->s_port); 2636 else 2637 errx(EX_DATAERR, "illegal divert/tee port"); 2638 } 2639 ac--; av++; 2640 break; 2641 2642 case TOK_FORWARD: { 2643 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2644 char *s, *end; 2645 2646 NEED1("missing forward address[:port]"); 2647 2648 action->opcode = O_FORWARD_IP; 2649 action->len = F_INSN_SIZE(ipfw_insn_sa); 2650 2651 p->sa.sin_len = sizeof(struct sockaddr_in); 2652 p->sa.sin_family = AF_INET; 2653 p->sa.sin_port = 0; 2654 /* 2655 * locate the address-port separator (':' or ',') 2656 */ 2657 s = strchr(*av, ':'); 2658 if (s == NULL) 2659 s = strchr(*av, ','); 2660 if (s != NULL) { 2661 *(s++) = '\0'; 2662 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2663 if (s == end) 2664 errx(EX_DATAERR, 2665 "illegal forwarding port ``%s''", s); 2666 p->sa.sin_port = (u_short)i; 2667 } 2668 lookup_host(*av, &(p->sa.sin_addr)); 2669 } 2670 ac--; av++; 2671 break; 2672 2673 default: 2674 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2675 } 2676 action = next_cmd(action); 2677 2678 /* 2679 * [log [logamount N]] -- log, optional 2680 * 2681 * If exists, it goes first in the cmdbuf, but then it is 2682 * skipped in the copy section to the end of the buffer. 2683 */ 2684 if (ac && !strncmp(*av, "log", strlen(*av))) { 2685 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2686 2687 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2688 cmd->opcode = O_LOG; 2689 av++; ac--; 2690 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2691 ac--; av++; 2692 NEED1("logamount requires argument"); 2693 c->max_log = atoi(*av); 2694 if (c->max_log < 0) 2695 errx(EX_DATAERR, "logamount must be positive"); 2696 ac--; av++; 2697 } 2698 cmd = next_cmd(cmd); 2699 } 2700 2701 if (have_state) /* must be a check-state, we are done */ 2702 goto done; 2703 2704 #define OR_START(target) \ 2705 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2706 if (open_par) \ 2707 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2708 prev = NULL; \ 2709 open_par = 1; \ 2710 if ( (av[0])[1] == '\0') { \ 2711 ac--; av++; \ 2712 } else \ 2713 (*av)++; \ 2714 } \ 2715 target: \ 2716 2717 2718 #define CLOSE_PAR \ 2719 if (open_par) { \ 2720 if (ac && ( \ 2721 !strncmp(*av, ")", strlen(*av)) || \ 2722 !strncmp(*av, "}", strlen(*av)) )) { \ 2723 prev = NULL; \ 2724 open_par = 0; \ 2725 ac--; av++; \ 2726 } else \ 2727 errx(EX_USAGE, "missing \")\"\n"); \ 2728 } 2729 2730 #define NOT_BLOCK \ 2731 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2732 if (cmd->len & F_NOT) \ 2733 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2734 cmd->len |= F_NOT; \ 2735 ac--; av++; \ 2736 } 2737 2738 #define OR_BLOCK(target) \ 2739 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2740 if (prev == NULL || open_par == 0) \ 2741 errx(EX_DATAERR, "invalid OR block"); \ 2742 prev->len |= F_OR; \ 2743 ac--; av++; \ 2744 goto target; \ 2745 } \ 2746 CLOSE_PAR; 2747 2748 first_cmd = cmd; 2749 2750 #if 0 2751 /* 2752 * MAC addresses, optional. 2753 * If we have this, we skip the part "proto from src to dst" 2754 * and jump straight to the option parsing. 2755 */ 2756 NOT_BLOCK; 2757 NEED1("missing protocol"); 2758 if (!strncmp(*av, "MAC", strlen(*av)) || 2759 !strncmp(*av, "mac", strlen(*av))) { 2760 ac--; av++; /* the "MAC" keyword */ 2761 add_mac(cmd, ac, av); /* exits in case of errors */ 2762 cmd = next_cmd(cmd); 2763 ac -= 2; av += 2; /* dst-mac and src-mac */ 2764 NOT_BLOCK; 2765 NEED1("missing mac type"); 2766 if (add_mactype(cmd, ac, av[0])) 2767 cmd = next_cmd(cmd); 2768 ac--; av++; /* any or mac-type */ 2769 goto read_options; 2770 } 2771 #endif 2772 2773 /* 2774 * protocol, mandatory 2775 */ 2776 OR_START(get_proto); 2777 NOT_BLOCK; 2778 NEED1("missing protocol"); 2779 if (add_proto(cmd, *av)) { 2780 av++; ac--; 2781 if (F_LEN(cmd) == 0) /* plain IP */ 2782 proto = 0; 2783 else { 2784 proto = cmd->arg1; 2785 prev = cmd; 2786 cmd = next_cmd(cmd); 2787 } 2788 } else if (first_cmd != cmd) { 2789 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2790 } else 2791 goto read_options; 2792 OR_BLOCK(get_proto); 2793 2794 /* 2795 * "from", mandatory 2796 */ 2797 if (!ac || strncmp(*av, "from", strlen(*av))) 2798 errx(EX_USAGE, "missing ``from''"); 2799 ac--; av++; 2800 2801 /* 2802 * source IP, mandatory 2803 */ 2804 OR_START(source_ip); 2805 NOT_BLOCK; /* optional "not" */ 2806 NEED1("missing source address"); 2807 if (add_srcip(cmd, *av)) { 2808 ac--; av++; 2809 if (F_LEN(cmd) != 0) { /* ! any */ 2810 prev = cmd; 2811 cmd = next_cmd(cmd); 2812 } 2813 } 2814 OR_BLOCK(source_ip); 2815 2816 /* 2817 * source ports, optional 2818 */ 2819 NOT_BLOCK; /* optional "not" */ 2820 if (ac) { 2821 if (!strncmp(*av, "any", strlen(*av)) || 2822 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2823 ac--; av++; 2824 if (F_LEN(cmd) != 0) 2825 cmd = next_cmd(cmd); 2826 } 2827 } 2828 2829 /* 2830 * "to", mandatory 2831 */ 2832 if (!ac || strncmp(*av, "to", strlen(*av))) 2833 errx(EX_USAGE, "missing ``to''"); 2834 av++; ac--; 2835 2836 /* 2837 * destination, mandatory 2838 */ 2839 OR_START(dest_ip); 2840 NOT_BLOCK; /* optional "not" */ 2841 NEED1("missing dst address"); 2842 if (add_dstip(cmd, *av)) { 2843 ac--; av++; 2844 if (F_LEN(cmd) != 0) { /* ! any */ 2845 prev = cmd; 2846 cmd = next_cmd(cmd); 2847 } 2848 } 2849 OR_BLOCK(dest_ip); 2850 2851 /* 2852 * dest. ports, optional 2853 */ 2854 NOT_BLOCK; /* optional "not" */ 2855 if (ac) { 2856 if (!strncmp(*av, "any", strlen(*av)) || 2857 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2858 ac--; av++; 2859 if (F_LEN(cmd) != 0) 2860 cmd = next_cmd(cmd); 2861 } 2862 } 2863 2864 read_options: 2865 if (ac && first_cmd == cmd) { 2866 /* 2867 * nothing specified so far, store in the rule to ease 2868 * printout later. 2869 */ 2870 rule->usr_flags = IPFW_USR_F_NORULE; 2871 } 2872 prev = NULL; 2873 while (ac) { 2874 char *s; 2875 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2876 2877 s = *av; 2878 cmd32 = (ipfw_insn_u32 *)cmd; 2879 2880 if (*s == '!') { /* alternate syntax for NOT */ 2881 if (cmd->len & F_NOT) 2882 errx(EX_USAGE, "double \"not\" not allowed\n"); 2883 cmd->len = F_NOT; 2884 s++; 2885 } 2886 i = match_token(rule_options, s); 2887 ac--; av++; 2888 switch(i) { 2889 case TOK_NOT: 2890 if (cmd->len & F_NOT) 2891 errx(EX_USAGE, "double \"not\" not allowed\n"); 2892 cmd->len = F_NOT; 2893 break; 2894 2895 case TOK_OR: 2896 if (open_par == 0 || prev == NULL) 2897 errx(EX_USAGE, "invalid \"or\" block\n"); 2898 prev->len |= F_OR; 2899 break; 2900 2901 case TOK_STARTBRACE: 2902 if (open_par) 2903 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2904 open_par = 1; 2905 break; 2906 2907 case TOK_ENDBRACE: 2908 if (!open_par) 2909 errx(EX_USAGE, "+missing \")\"\n"); 2910 open_par = 0; 2911 prev = NULL; 2912 break; 2913 2914 case TOK_IN: 2915 fill_cmd(cmd, O_IN, 0, 0); 2916 break; 2917 2918 case TOK_OUT: 2919 cmd->len ^= F_NOT; /* toggle F_NOT */ 2920 fill_cmd(cmd, O_IN, 0, 0); 2921 break; 2922 2923 case TOK_FRAG: 2924 fill_cmd(cmd, O_FRAG, 0, 0); 2925 break; 2926 2927 case TOK_LAYER2: 2928 fill_cmd(cmd, O_LAYER2, 0, 0); 2929 break; 2930 2931 case TOK_XMIT: 2932 case TOK_RECV: 2933 case TOK_VIA: 2934 NEED1("recv, xmit, via require interface name" 2935 " or address"); 2936 fill_iface((ipfw_insn_if *)cmd, av[0]); 2937 ac--; av++; 2938 if (F_LEN(cmd) == 0) /* not a valid address */ 2939 break; 2940 if (i == TOK_XMIT) 2941 cmd->opcode = O_XMIT; 2942 else if (i == TOK_RECV) 2943 cmd->opcode = O_RECV; 2944 else if (i == TOK_VIA) 2945 cmd->opcode = O_VIA; 2946 break; 2947 2948 case TOK_ICMPTYPES: 2949 NEED1("icmptypes requires list of types"); 2950 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 2951 av++; ac--; 2952 break; 2953 2954 case TOK_IPTTL: 2955 NEED1("ipttl requires TTL"); 2956 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 2957 ac--; av++; 2958 break; 2959 2960 case TOK_IPID: 2961 NEED1("ipid requires length"); 2962 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 2963 ac--; av++; 2964 break; 2965 2966 case TOK_IPLEN: 2967 NEED1("iplen requires length"); 2968 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 2969 ac--; av++; 2970 break; 2971 2972 case TOK_IPVER: 2973 NEED1("ipver requires version"); 2974 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 2975 ac--; av++; 2976 break; 2977 2978 case TOK_IPPRECEDENCE: 2979 NEED1("ipprecedence requires value"); 2980 fill_cmd(cmd, O_IPPRECEDENCE, 0, 2981 (strtoul(*av, NULL, 0) & 7) << 5); 2982 ac--; av++; 2983 break; 2984 2985 case TOK_IPOPTS: 2986 NEED1("missing argument for ipoptions"); 2987 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 2988 ac--; av++; 2989 break; 2990 2991 case TOK_IPTOS: 2992 NEED1("missing argument for iptos"); 2993 fill_flags(cmd, O_IPTOS, f_iptos, *av); 2994 ac--; av++; 2995 break; 2996 2997 case TOK_UID: 2998 NEED1("uid requires argument"); 2999 { 3000 char *end; 3001 uid_t uid; 3002 struct passwd *pwd; 3003 3004 cmd->opcode = O_UID; 3005 uid = strtoul(*av, &end, 0); 3006 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3007 if (pwd == NULL) 3008 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3009 cmd32->d[0] = pwd->pw_uid; 3010 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3011 ac--; av++; 3012 } 3013 break; 3014 3015 case TOK_GID: 3016 NEED1("gid requires argument"); 3017 { 3018 char *end; 3019 gid_t gid; 3020 struct group *grp; 3021 3022 cmd->opcode = O_GID; 3023 gid = strtoul(*av, &end, 0); 3024 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3025 if (grp == NULL) 3026 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3027 cmd32->d[0] = grp->gr_gid; 3028 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3029 ac--; av++; 3030 } 3031 break; 3032 3033 case TOK_ESTAB: 3034 fill_cmd(cmd, O_ESTAB, 0, 0); 3035 break; 3036 3037 case TOK_SETUP: 3038 fill_cmd(cmd, O_TCPFLAGS, 0, 3039 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3040 break; 3041 3042 case TOK_TCPOPTS: 3043 NEED1("missing argument for tcpoptions"); 3044 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3045 ac--; av++; 3046 break; 3047 3048 case TOK_TCPSEQ: 3049 case TOK_TCPACK: 3050 NEED1("tcpseq/tcpack requires argument"); 3051 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3052 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3053 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3054 ac--; av++; 3055 break; 3056 3057 case TOK_TCPWIN: 3058 NEED1("tcpwin requires length"); 3059 fill_cmd(cmd, O_TCPWIN, 0, 3060 htons(strtoul(*av, NULL, 0))); 3061 ac--; av++; 3062 break; 3063 3064 case TOK_TCPFLAGS: 3065 NEED1("missing argument for tcpflags"); 3066 cmd->opcode = O_TCPFLAGS; 3067 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3068 ac--; av++; 3069 break; 3070 3071 case TOK_KEEPSTATE: 3072 if (open_par) 3073 errx(EX_USAGE, "keep-state cannot be part " 3074 "of an or block"); 3075 if (have_state) 3076 errx(EX_USAGE, "only one of keep-state " 3077 "and limit is allowed"); 3078 have_state = cmd; 3079 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3080 break; 3081 3082 case TOK_LIMIT: 3083 if (open_par) 3084 errx(EX_USAGE, "limit cannot be part " 3085 "of an or block"); 3086 if (have_state) 3087 errx(EX_USAGE, "only one of keep-state " 3088 "and limit is allowed"); 3089 NEED1("limit needs mask and # of connections"); 3090 have_state = cmd; 3091 { 3092 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3093 3094 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3095 cmd->opcode = O_LIMIT; 3096 c->limit_mask = 0; 3097 c->conn_limit = 0; 3098 for (; ac >1 ;) { 3099 int val; 3100 3101 val = match_token(limit_masks, *av); 3102 if (val <= 0) 3103 break; 3104 c->limit_mask |= val; 3105 ac--; av++; 3106 } 3107 c->conn_limit = atoi(*av); 3108 if (c->conn_limit == 0) 3109 errx(EX_USAGE, "limit: limit must be >0"); 3110 if (c->limit_mask == 0) 3111 errx(EX_USAGE, "missing limit mask"); 3112 ac--; av++; 3113 } 3114 break; 3115 3116 case TOK_PROTO: 3117 NEED1("missing protocol"); 3118 if (add_proto(cmd, *av)) { 3119 proto = cmd->arg1; 3120 ac--; av++; 3121 } else 3122 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3123 break; 3124 3125 case TOK_SRCIP: 3126 NEED1("missing source IP"); 3127 if (add_srcip(cmd, *av)) { 3128 ac--; av++; 3129 } 3130 break; 3131 3132 case TOK_DSTIP: 3133 NEED1("missing destination IP"); 3134 if (add_dstip(cmd, *av)) { 3135 ac--; av++; 3136 } 3137 break; 3138 3139 case TOK_SRCPORT: 3140 NEED1("missing source port"); 3141 if (!strncmp(*av, "any", strlen(*av)) || 3142 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3143 ac--; av++; 3144 } else 3145 errx(EX_DATAERR, "invalid source port %s", *av); 3146 break; 3147 3148 case TOK_DSTPORT: 3149 NEED1("missing destination port"); 3150 if (!strncmp(*av, "any", strlen(*av)) || 3151 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3152 ac--; av++; 3153 } else 3154 errx(EX_DATAERR, "invalid destination port %s", 3155 *av); 3156 break; 3157 3158 case TOK_MAC: 3159 if (ac < 2) 3160 errx(EX_USAGE, "MAC dst-mac src-mac"); 3161 if (add_mac(cmd, ac, av)) { 3162 ac -= 2; av += 2; 3163 } 3164 break; 3165 3166 case TOK_MACTYPE: 3167 NEED1("missing mac type"); 3168 if (!add_mactype(cmd, ac, *av)) 3169 errx(EX_DATAERR, "invalid mac type %s", *av); 3170 ac--; av++; 3171 break; 3172 3173 default: 3174 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3175 } 3176 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3177 prev = cmd; 3178 cmd = next_cmd(cmd); 3179 } 3180 } 3181 3182 done: 3183 /* 3184 * Now copy stuff into the rule. 3185 * If we have a keep-state option, the first instruction 3186 * must be a PROBE_STATE (which is generated here). 3187 * If we have a LOG option, it was stored as the first command, 3188 * and now must be moved to the top of the action part. 3189 */ 3190 dst = (ipfw_insn *)rule->cmd; 3191 3192 /* 3193 * First thing to write into the command stream is the match probability. 3194 */ 3195 if (match_prob != 1) { /* 1 means always match */ 3196 dst->opcode = O_PROB; 3197 dst->len = 2; 3198 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3199 dst += dst->len; 3200 } 3201 3202 /* 3203 * generate O_PROBE_STATE if necessary 3204 */ 3205 if (have_state && have_state->opcode != O_CHECK_STATE) { 3206 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3207 dst = next_cmd(dst); 3208 } 3209 /* 3210 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3211 */ 3212 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3213 i = F_LEN(src); 3214 3215 switch (src->opcode) { 3216 case O_LOG: 3217 case O_KEEP_STATE: 3218 case O_LIMIT: 3219 break; 3220 default: 3221 bcopy(src, dst, i * sizeof(u_int32_t)); 3222 dst += i; 3223 } 3224 } 3225 3226 /* 3227 * put back the have_state command as last opcode 3228 */ 3229 if (have_state && have_state->opcode != O_CHECK_STATE) { 3230 i = F_LEN(have_state); 3231 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3232 dst += i; 3233 } 3234 /* 3235 * start action section 3236 */ 3237 rule->act_ofs = dst - rule->cmd; 3238 3239 /* 3240 * put back O_LOG if necessary 3241 */ 3242 src = (ipfw_insn *)cmdbuf; 3243 if ( src->opcode == O_LOG ) { 3244 i = F_LEN(src); 3245 bcopy(src, dst, i * sizeof(u_int32_t)); 3246 dst += i; 3247 } 3248 /* 3249 * copy all other actions 3250 */ 3251 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3252 i = F_LEN(src); 3253 bcopy(src, dst, i * sizeof(u_int32_t)); 3254 dst += i; 3255 } 3256 3257 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3258 i = (void *)dst - (void *)rule; 3259 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3260 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3261 if (!do_quiet) 3262 show_ipfw(rule, 10, 10); 3263 } 3264 3265 static void 3266 zero(int ac, char *av[]) 3267 { 3268 int rulenum; 3269 int failed = EX_OK; 3270 3271 av++; ac--; 3272 3273 if (!ac) { 3274 /* clear all entries */ 3275 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3276 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3277 if (!do_quiet) 3278 printf("Accounting cleared.\n"); 3279 3280 return; 3281 } 3282 3283 while (ac) { 3284 /* Rule number */ 3285 if (isdigit(**av)) { 3286 rulenum = atoi(*av); 3287 av++; 3288 ac--; 3289 if (setsockopt(s, IPPROTO_IP, 3290 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3291 warn("rule %u: setsockopt(IP_FW_ZERO)", 3292 rulenum); 3293 failed = EX_UNAVAILABLE; 3294 } else if (!do_quiet) 3295 printf("Entry %d cleared\n", rulenum); 3296 } else { 3297 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3298 } 3299 } 3300 if (failed != EX_OK) 3301 exit(failed); 3302 } 3303 3304 static void 3305 resetlog(int ac, char *av[]) 3306 { 3307 int rulenum; 3308 int failed = EX_OK; 3309 3310 av++; ac--; 3311 3312 if (!ac) { 3313 /* clear all entries */ 3314 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3315 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3316 if (!do_quiet) 3317 printf("Logging counts reset.\n"); 3318 3319 return; 3320 } 3321 3322 while (ac) { 3323 /* Rule number */ 3324 if (isdigit(**av)) { 3325 rulenum = atoi(*av); 3326 av++; 3327 ac--; 3328 if (setsockopt(s, IPPROTO_IP, 3329 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3330 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3331 rulenum); 3332 failed = EX_UNAVAILABLE; 3333 } else if (!do_quiet) 3334 printf("Entry %d logging count reset\n", 3335 rulenum); 3336 } else { 3337 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3338 } 3339 } 3340 if (failed != EX_OK) 3341 exit(failed); 3342 } 3343 3344 static void 3345 flush(void) 3346 { 3347 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3348 3349 if (!do_force && !do_quiet) { /* need to ask user */ 3350 int c; 3351 3352 printf("Are you sure? [yn] "); 3353 fflush(stdout); 3354 do { 3355 c = toupper(getc(stdin)); 3356 while (c != '\n' && getc(stdin) != '\n') 3357 if (feof(stdin)) 3358 return; /* and do not flush */ 3359 } while (c != 'Y' && c != 'N'); 3360 printf("\n"); 3361 if (c == 'N') /* user said no */ 3362 return; 3363 } 3364 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3365 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3366 do_pipe ? "DUMMYNET" : "FW"); 3367 if (!do_quiet) 3368 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3369 } 3370 3371 static int 3372 ipfw_main(int ac, char **av) 3373 { 3374 int ch; 3375 3376 if (ac == 1) 3377 show_usage(); 3378 3379 /* Set the force flag for non-interactive processes */ 3380 do_force = !isatty(STDIN_FILENO); 3381 3382 optind = optreset = 1; 3383 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3384 switch (ch) { 3385 case 'h': /* help */ 3386 help(); 3387 break; /* NOTREACHED */ 3388 3389 case 's': /* sort */ 3390 do_sort = atoi(optarg); 3391 break; 3392 case 'a': 3393 do_acct = 1; 3394 break; 3395 case 'c': 3396 do_compact = 1; 3397 break; 3398 case 'd': 3399 do_dynamic = 1; 3400 break; 3401 case 'e': 3402 do_expired = 1; 3403 break; 3404 case 'f': 3405 do_force = 1; 3406 break; 3407 case 'N': 3408 do_resolv = 1; 3409 break; 3410 case 'q': 3411 do_quiet = 1; 3412 break; 3413 case 'S': 3414 show_sets = 1; 3415 break; 3416 case 't': 3417 do_time = 1; 3418 break; 3419 case 'v': /* verbose */ 3420 verbose++; 3421 break; 3422 default: 3423 show_usage(); 3424 } 3425 3426 ac -= optind; 3427 av += optind; 3428 NEED1("bad arguments, for usage summary ``ipfw''"); 3429 3430 /* 3431 * optional: pipe or queue 3432 */ 3433 if (!strncmp(*av, "pipe", strlen(*av))) { 3434 do_pipe = 1; 3435 ac--; 3436 av++; 3437 } else if (!strncmp(*av, "queue", strlen(*av))) { 3438 do_pipe = 2; 3439 ac--; 3440 av++; 3441 } 3442 NEED1("missing command"); 3443 3444 /* 3445 * for pipes and queues we normally say 'pipe NN config' 3446 * but the code is easier to parse as 'pipe config NN' 3447 * so we swap the two arguments. 3448 */ 3449 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3450 char *p = av[0]; 3451 av[0] = av[1]; 3452 av[1] = p; 3453 } 3454 if (!strncmp(*av, "add", strlen(*av))) 3455 add(ac, av); 3456 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3457 config_pipe(ac, av); 3458 else if (!strncmp(*av, "delete", strlen(*av))) 3459 delete(ac, av); 3460 else if (!strncmp(*av, "flush", strlen(*av))) 3461 flush(); 3462 else if (!strncmp(*av, "zero", strlen(*av))) 3463 zero(ac, av); 3464 else if (!strncmp(*av, "resetlog", strlen(*av))) 3465 resetlog(ac, av); 3466 else if (!strncmp(*av, "print", strlen(*av)) || 3467 !strncmp(*av, "list", strlen(*av))) 3468 list(ac, av); 3469 else if (!strncmp(*av, "enable", strlen(*av))) 3470 sysctl_handler(ac, av, 1); 3471 else if (!strncmp(*av, "disable", strlen(*av))) 3472 sysctl_handler(ac, av, 0); 3473 else if (!strncmp(*av, "set", strlen(*av))) 3474 sets_handler(ac, av); 3475 else if (!strncmp(*av, "show", strlen(*av))) { 3476 do_acct++; 3477 list(ac, av); 3478 } else 3479 errx(EX_USAGE, "bad command `%s'", *av); 3480 return 0; 3481 } 3482 3483 3484 static void 3485 ipfw_readfile(int ac, char *av[]) 3486 { 3487 #define MAX_ARGS 32 3488 #define WHITESP " \t\f\v\n\r" 3489 char buf[BUFSIZ]; 3490 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3491 char linename[20]; 3492 int i=0, lineno=0, qflag=0, pflag=0, status; 3493 FILE *f = NULL; 3494 pid_t preproc = 0; 3495 int c; 3496 3497 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 3498 switch(c) { 3499 case 'D': 3500 if (!pflag) 3501 errx(EX_USAGE, "-D requires -p"); 3502 if (i > MAX_ARGS - 2) 3503 errx(EX_USAGE, 3504 "too many -D or -U options"); 3505 args[i++] = "-D"; 3506 args[i++] = optarg; 3507 break; 3508 3509 case 'U': 3510 if (!pflag) 3511 errx(EX_USAGE, "-U requires -p"); 3512 if (i > MAX_ARGS - 2) 3513 errx(EX_USAGE, 3514 "too many -D or -U options"); 3515 args[i++] = "-U"; 3516 args[i++] = optarg; 3517 break; 3518 3519 case 'p': 3520 pflag = 1; 3521 cmd = optarg; 3522 args[0] = cmd; 3523 i = 1; 3524 break; 3525 3526 case 'q': 3527 qflag = 1; 3528 break; 3529 3530 default: 3531 errx(EX_USAGE, "bad arguments, for usage" 3532 " summary ``ipfw''"); 3533 } 3534 3535 av += optind; 3536 ac -= optind; 3537 if (ac != 1) 3538 errx(EX_USAGE, "extraneous filename arguments"); 3539 3540 if ((f = fopen(av[0], "r")) == NULL) 3541 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3542 3543 if (pflag) { 3544 /* pipe through preprocessor (cpp or m4) */ 3545 int pipedes[2]; 3546 3547 args[i] = NULL; 3548 3549 if (pipe(pipedes) == -1) 3550 err(EX_OSERR, "cannot create pipe"); 3551 3552 switch((preproc = fork())) { 3553 case -1: 3554 err(EX_OSERR, "cannot fork"); 3555 3556 case 0: 3557 /* child */ 3558 if (dup2(fileno(f), 0) == -1 3559 || dup2(pipedes[1], 1) == -1) 3560 err(EX_OSERR, "dup2()"); 3561 fclose(f); 3562 close(pipedes[1]); 3563 close(pipedes[0]); 3564 execvp(cmd, args); 3565 err(EX_OSERR, "execvp(%s) failed", cmd); 3566 3567 default: 3568 /* parent */ 3569 fclose(f); 3570 close(pipedes[1]); 3571 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3572 int savederrno = errno; 3573 3574 kill(preproc, SIGTERM); 3575 errno = savederrno; 3576 err(EX_OSERR, "fdopen()"); 3577 } 3578 } 3579 } 3580 3581 while (fgets(buf, BUFSIZ, f)) { 3582 lineno++; 3583 snprintf(linename, sizeof(linename), "Line %d", lineno); 3584 args[0] = linename; 3585 3586 if (*buf == '#') 3587 continue; 3588 if ((p = strchr(buf, '#')) != NULL) 3589 *p = '\0'; 3590 i = 1; 3591 if (qflag) 3592 args[i++] = "-q"; 3593 for (a = strtok(buf, WHITESP); 3594 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3595 args[i] = a; 3596 if (i == (qflag? 2: 1)) 3597 continue; 3598 if (i == MAX_ARGS) 3599 errx(EX_USAGE, "%s: too many arguments", 3600 linename); 3601 args[i] = NULL; 3602 3603 ipfw_main(i, args); 3604 } 3605 fclose(f); 3606 if (pflag) { 3607 if (waitpid(preproc, &status, 0) == -1) 3608 errx(EX_OSERR, "waitpid()"); 3609 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3610 errx(EX_UNAVAILABLE, 3611 "preprocessor exited with status %d", 3612 WEXITSTATUS(status)); 3613 else if (WIFSIGNALED(status)) 3614 errx(EX_UNAVAILABLE, 3615 "preprocessor exited with signal %d", 3616 WTERMSIG(status)); 3617 } 3618 } 3619 3620 int 3621 main(int ac, char *av[]) 3622 { 3623 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3624 if (s < 0) 3625 err(EX_UNAVAILABLE, "socket"); 3626 3627 /* 3628 * If the last argument is an absolute pathname, interpret it 3629 * as a file to be preprocessed. 3630 */ 3631 3632 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3633 ipfw_readfile(ac, av); 3634 else 3635 ipfw_main(ac, av); 3636 return EX_OK; 3637 } 3638