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 * $DragonFly: src/sbin/ipfw/ipfw2.c,v 1.6 2004/12/18 21:43:38 swildner Exp $ 22 */ 23 24 #include <sys/param.h> 25 #include <sys/mbuf.h> 26 #include <sys/socket.h> 27 #include <sys/sockio.h> 28 #include <sys/sysctl.h> 29 #include <sys/time.h> 30 #include <sys/wait.h> 31 32 #include <ctype.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <grp.h> 36 #include <limits.h> 37 #include <netdb.h> 38 #include <pwd.h> 39 #include <signal.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <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/dummynet/ip_dummynet.h> 55 #include <netinet/tcp.h> 56 #include <arpa/inet.h> 57 58 int s, /* main RAW socket */ 59 do_resolv, /* Would try to resolve all */ 60 do_acct, /* Show packet/byte count */ 61 do_time, /* Show time stamps */ 62 do_quiet, /* Be quiet in add and flush */ 63 do_force, /* Don't ask for confirmation */ 64 do_pipe, /* this cmd refers to a pipe */ 65 do_sort, /* field to sort results (0 = no) */ 66 do_dynamic, /* display dynamic rules */ 67 do_expired, /* display expired dynamic rules */ 68 do_compact, /* show rules in compact mode */ 69 show_sets, /* display rule sets */ 70 verbose; 71 72 #define IP_MASK_ALL 0xffffffff 73 74 /* 75 * structure to hold flag names and associated values to be 76 * set in the appropriate masks. 77 * A NULL string terminates the array. 78 * Often, an element with 0 value contains an error string. 79 * 80 */ 81 struct _s_x { 82 char *s; 83 int x; 84 }; 85 86 static struct _s_x f_tcpflags[] = { 87 { "syn", TH_SYN }, 88 { "fin", TH_FIN }, 89 { "ack", TH_ACK }, 90 { "psh", TH_PUSH }, 91 { "rst", TH_RST }, 92 { "urg", TH_URG }, 93 { "tcp flag", 0 }, 94 { NULL, 0 } 95 }; 96 97 static struct _s_x f_tcpopts[] = { 98 { "mss", IP_FW_TCPOPT_MSS }, 99 { "maxseg", IP_FW_TCPOPT_MSS }, 100 { "window", IP_FW_TCPOPT_WINDOW }, 101 { "sack", IP_FW_TCPOPT_SACK }, 102 { "ts", IP_FW_TCPOPT_TS }, 103 { "timestamp", IP_FW_TCPOPT_TS }, 104 { "cc", IP_FW_TCPOPT_CC }, 105 { "tcp option", 0 }, 106 { NULL, 0 } 107 }; 108 109 /* 110 * IP options span the range 0 to 255 so we need to remap them 111 * (though in fact only the low 5 bits are significant). 112 */ 113 static struct _s_x f_ipopts[] = { 114 { "ssrr", IP_FW_IPOPT_SSRR}, 115 { "lsrr", IP_FW_IPOPT_LSRR}, 116 { "rr", IP_FW_IPOPT_RR}, 117 { "ts", IP_FW_IPOPT_TS}, 118 { "ip option", 0 }, 119 { NULL, 0 } 120 }; 121 122 static struct _s_x f_iptos[] = { 123 { "lowdelay", IPTOS_LOWDELAY}, 124 { "throughput", IPTOS_THROUGHPUT}, 125 { "reliability", IPTOS_RELIABILITY}, 126 { "mincost", IPTOS_MINCOST}, 127 { "congestion", IPTOS_CE}, 128 { "ecntransport", IPTOS_ECT}, 129 { "ip tos option", 0}, 130 { NULL, 0 } 131 }; 132 133 static struct _s_x limit_masks[] = { 134 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 135 {"src-addr", DYN_SRC_ADDR}, 136 {"src-port", DYN_SRC_PORT}, 137 {"dst-addr", DYN_DST_ADDR}, 138 {"dst-port", DYN_DST_PORT}, 139 {NULL, 0} 140 }; 141 142 /* 143 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 144 * This is only used in this code. 145 */ 146 #define IPPROTO_ETHERTYPE 0x1000 147 static struct _s_x ether_types[] = { 148 /* 149 * Note, we cannot use "-:&/" in the names because they are field 150 * separators in the type specifications. Also, we use s = NULL as 151 * end-delimiter, because a type of 0 can be legal. 152 */ 153 { "ip", 0x0800 }, 154 { "ipv4", 0x0800 }, 155 { "ipv6", 0x86dd }, 156 { "arp", 0x0806 }, 157 { "rarp", 0x8035 }, 158 { "vlan", 0x8100 }, 159 { "loop", 0x9000 }, 160 { "trail", 0x1000 }, 161 { "at", 0x809b }, 162 { "atalk", 0x809b }, 163 { "aarp", 0x80f3 }, 164 { "pppoe_disc", 0x8863 }, 165 { "pppoe_sess", 0x8864 }, 166 { "ipx_8022", 0x00E0 }, 167 { "ipx_8023", 0x0000 }, 168 { "ipx_ii", 0x8137 }, 169 { "ipx_snap", 0x8137 }, 170 { "ipx", 0x8137 }, 171 { "ns", 0x0600 }, 172 { NULL, 0 } 173 }; 174 175 static void show_usage(void); 176 177 enum tokens { 178 TOK_NULL=0, 179 180 TOK_OR, 181 TOK_NOT, 182 TOK_STARTBRACE, 183 TOK_ENDBRACE, 184 185 TOK_ACCEPT, 186 TOK_COUNT, 187 TOK_PIPE, 188 TOK_QUEUE, 189 TOK_DIVERT, 190 TOK_TEE, 191 TOK_FORWARD, 192 TOK_SKIPTO, 193 TOK_DENY, 194 TOK_REJECT, 195 TOK_RESET, 196 TOK_UNREACH, 197 TOK_CHECKSTATE, 198 199 TOK_UID, 200 TOK_GID, 201 TOK_IN, 202 TOK_LIMIT, 203 TOK_KEEPSTATE, 204 TOK_LAYER2, 205 TOK_OUT, 206 TOK_XMIT, 207 TOK_RECV, 208 TOK_VIA, 209 TOK_FRAG, 210 TOK_IPOPTS, 211 TOK_IPLEN, 212 TOK_IPID, 213 TOK_IPPRECEDENCE, 214 TOK_IPTOS, 215 TOK_IPTTL, 216 TOK_IPVER, 217 TOK_ESTAB, 218 TOK_SETUP, 219 TOK_TCPFLAGS, 220 TOK_TCPOPTS, 221 TOK_TCPSEQ, 222 TOK_TCPACK, 223 TOK_TCPWIN, 224 TOK_ICMPTYPES, 225 TOK_MAC, 226 TOK_MACTYPE, 227 228 TOK_PLR, 229 TOK_NOERROR, 230 TOK_BUCKETS, 231 TOK_DSTIP, 232 TOK_SRCIP, 233 TOK_DSTPORT, 234 TOK_SRCPORT, 235 TOK_ALL, 236 TOK_MASK, 237 TOK_BW, 238 TOK_DELAY, 239 TOK_RED, 240 TOK_GRED, 241 TOK_DROPTAIL, 242 TOK_PROTO, 243 TOK_WEIGHT, 244 }; 245 246 struct _s_x dummynet_params[] = { 247 { "plr", TOK_PLR }, 248 { "noerror", TOK_NOERROR }, 249 { "buckets", TOK_BUCKETS }, 250 { "dst-ip", TOK_DSTIP }, 251 { "src-ip", TOK_SRCIP }, 252 { "dst-port", TOK_DSTPORT }, 253 { "src-port", TOK_SRCPORT }, 254 { "proto", TOK_PROTO }, 255 { "weight", TOK_WEIGHT }, 256 { "all", TOK_ALL }, 257 { "mask", TOK_MASK }, 258 { "droptail", TOK_DROPTAIL }, 259 { "red", TOK_RED }, 260 { "gred", TOK_GRED }, 261 { "bw", TOK_BW }, 262 { "bandwidth", TOK_BW }, 263 { "delay", TOK_DELAY }, 264 { "pipe", TOK_PIPE }, 265 { "queue", TOK_QUEUE }, 266 { "dummynet-params", TOK_NULL }, 267 { NULL, 0 } 268 }; 269 270 struct _s_x rule_actions[] = { 271 { "accept", TOK_ACCEPT }, 272 { "pass", TOK_ACCEPT }, 273 { "allow", TOK_ACCEPT }, 274 { "permit", TOK_ACCEPT }, 275 { "count", TOK_COUNT }, 276 { "pipe", TOK_PIPE }, 277 { "queue", TOK_QUEUE }, 278 { "divert", TOK_DIVERT }, 279 { "tee", TOK_TEE }, 280 { "fwd", TOK_FORWARD }, 281 { "forward", TOK_FORWARD }, 282 { "skipto", TOK_SKIPTO }, 283 { "deny", TOK_DENY }, 284 { "drop", TOK_DENY }, 285 { "reject", TOK_REJECT }, 286 { "reset", TOK_RESET }, 287 { "unreach", TOK_UNREACH }, 288 { "check-state", TOK_CHECKSTATE }, 289 { NULL, TOK_NULL }, 290 { NULL, 0 } 291 }; 292 293 struct _s_x rule_options[] = { 294 { "uid", TOK_UID }, 295 { "gid", TOK_GID }, 296 { "in", TOK_IN }, 297 { "limit", TOK_LIMIT }, 298 { "keep-state", TOK_KEEPSTATE }, 299 { "bridged", TOK_LAYER2 }, 300 { "layer2", TOK_LAYER2 }, 301 { "out", TOK_OUT }, 302 { "xmit", TOK_XMIT }, 303 { "recv", TOK_RECV }, 304 { "via", TOK_VIA }, 305 { "fragment", TOK_FRAG }, 306 { "frag", TOK_FRAG }, 307 { "ipoptions", TOK_IPOPTS }, 308 { "ipopts", TOK_IPOPTS }, 309 { "iplen", TOK_IPLEN }, 310 { "ipid", TOK_IPID }, 311 { "ipprecedence", TOK_IPPRECEDENCE }, 312 { "iptos", TOK_IPTOS }, 313 { "ipttl", TOK_IPTTL }, 314 { "ipversion", TOK_IPVER }, 315 { "ipver", TOK_IPVER }, 316 { "estab", TOK_ESTAB }, 317 { "established", TOK_ESTAB }, 318 { "setup", TOK_SETUP }, 319 { "tcpflags", TOK_TCPFLAGS }, 320 { "tcpflgs", TOK_TCPFLAGS }, 321 { "tcpoptions", TOK_TCPOPTS }, 322 { "tcpopts", TOK_TCPOPTS }, 323 { "tcpseq", TOK_TCPSEQ }, 324 { "tcpack", TOK_TCPACK }, 325 { "tcpwin", TOK_TCPWIN }, 326 { "icmptype", TOK_ICMPTYPES }, 327 { "icmptypes", TOK_ICMPTYPES }, 328 { "dst-ip", TOK_DSTIP }, 329 { "src-ip", TOK_SRCIP }, 330 { "dst-port", TOK_DSTPORT }, 331 { "src-port", TOK_SRCPORT }, 332 { "proto", TOK_PROTO }, 333 { "MAC", TOK_MAC }, 334 { "mac", TOK_MAC }, 335 { "mac-type", TOK_MACTYPE }, 336 337 { "not", TOK_NOT }, /* pseudo option */ 338 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 339 { "or", TOK_OR }, /* pseudo option */ 340 { "|", /* escape */ TOK_OR }, /* pseudo option */ 341 { "{", TOK_STARTBRACE }, /* pseudo option */ 342 { "(", TOK_STARTBRACE }, /* pseudo option */ 343 { "}", TOK_ENDBRACE }, /* pseudo option */ 344 { ")", TOK_ENDBRACE }, /* pseudo option */ 345 { NULL, TOK_NULL }, 346 { NULL, 0 } 347 }; 348 349 /** 350 * match_token takes a table and a string, returns the value associated 351 * with the string (0 meaning an error in most cases) 352 */ 353 static int 354 match_token(struct _s_x *table, char *string) 355 { 356 struct _s_x *pt; 357 int i = strlen(string); 358 359 for (pt = table ; i && pt->s != NULL ; pt++) 360 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 361 return pt->x; 362 return -1; 363 }; 364 365 static char * 366 match_value(struct _s_x *p, u_int32_t value) 367 { 368 for (; p->s != NULL; p++) 369 if (p->x == value) 370 return p->s; 371 return NULL; 372 } 373 374 /* 375 * prints one port, symbolic or numeric 376 */ 377 static void 378 print_port(int proto, u_int16_t port) 379 { 380 381 if (proto == IPPROTO_ETHERTYPE) { 382 char *s; 383 384 if (do_resolv && (s = match_value(ether_types, port)) ) 385 printf("%s", s); 386 else 387 printf("0x%04x", port); 388 } else { 389 struct servent *se = NULL; 390 if (do_resolv) { 391 struct protoent *pe = getprotobynumber(proto); 392 393 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 394 } 395 if (se) 396 printf("%s", se->s_name); 397 else 398 printf("%d", port); 399 } 400 } 401 402 /* 403 * print the values in a list of ports 404 * XXX todo: add support for mask. 405 */ 406 static void 407 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 408 { 409 u_int16_t *p = cmd->ports; 410 int i; 411 char *sep= " "; 412 413 if (cmd->o.len & F_NOT) 414 printf(" not"); 415 if (opcode != 0) 416 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 417 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 418 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 419 printf(sep); 420 print_port(proto, p[0]); 421 if (p[0] != p[1]) { 422 printf("-"); 423 print_port(proto, p[1]); 424 } 425 sep = ","; 426 } 427 } 428 429 /* 430 * Like strtol, but also translates service names into port numbers 431 * for some protocols. 432 * In particular: 433 * proto == -1 disables the protocol check; 434 * proto == IPPROTO_ETHERTYPE looks up an internal table 435 * proto == <some value in /etc/protocols> matches the values there. 436 * Returns *end == s in case the parameter is not found. 437 */ 438 static int 439 strtoport(char *s, char **end, int base, int proto) 440 { 441 char *p, *buf; 442 char *s1; 443 int i; 444 445 *end = s; /* default - not found */ 446 if ( *s == '\0') 447 return 0; /* not found */ 448 449 if (isdigit(*s)) 450 return strtol(s, end, base); 451 452 /* 453 * find separator. '\\' escapes the next char. 454 */ 455 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 456 if (*s1 == '\\' && s1[1] != '\0') 457 s1++; 458 459 buf = malloc(s1 - s + 1); 460 if (buf == NULL) 461 return 0; 462 463 /* 464 * copy into a buffer skipping backslashes 465 */ 466 for (p = s, i = 0; p != s1 ; p++) 467 if ( *p != '\\') 468 buf[i++] = *p; 469 buf[i++] = '\0'; 470 471 if (proto == IPPROTO_ETHERTYPE) { 472 i = match_token(ether_types, buf); 473 free(buf); 474 if (i != -1) { /* found */ 475 *end = s1; 476 return i; 477 } 478 } else { 479 struct protoent *pe = NULL; 480 struct servent *se; 481 482 if (proto != 0) 483 pe = getprotobynumber(proto); 484 setservent(1); 485 se = getservbyname(buf, pe ? pe->p_name : NULL); 486 free(buf); 487 if (se != NULL) { 488 *end = s1; 489 return ntohs(se->s_port); 490 } 491 } 492 return 0; /* not found */ 493 } 494 495 /* 496 * fill the body of the command with the list of port ranges. 497 * At the moment it only understands numeric ranges. 498 */ 499 static int 500 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 501 { 502 u_int16_t *p = cmd->ports; 503 int i = 0; 504 char *s = av; 505 506 while (*s) { 507 u_int16_t a, b; 508 509 a = strtoport(av, &s, 0, proto); 510 if (s == av) /* no parameter */ 511 break; 512 if (*s == '-') { /* a range */ 513 av = s+1; 514 b = strtoport(av, &s, 0, proto); 515 if (s == av) /* no parameter */ 516 break; 517 p[0] = a; 518 p[1] = b; 519 } else if (*s == ',' || *s == '\0' ) { 520 p[0] = p[1] = a; 521 } else { /* invalid separator */ 522 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 523 *s, av); 524 } 525 i++; 526 p += 2; 527 av = s+1; 528 } 529 if (i > 0) { 530 if (i+1 > F_LEN_MASK) 531 errx(EX_DATAERR, "too many ports/ranges\n"); 532 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 533 } 534 return i; 535 } 536 537 static struct _s_x icmpcodes[] = { 538 { "net", ICMP_UNREACH_NET }, 539 { "host", ICMP_UNREACH_HOST }, 540 { "protocol", ICMP_UNREACH_PROTOCOL }, 541 { "port", ICMP_UNREACH_PORT }, 542 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 543 { "srcfail", ICMP_UNREACH_SRCFAIL }, 544 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 545 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 546 { "isolated", ICMP_UNREACH_ISOLATED }, 547 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 548 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 549 { "tosnet", ICMP_UNREACH_TOSNET }, 550 { "toshost", ICMP_UNREACH_TOSHOST }, 551 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 552 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 553 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 554 { NULL, 0 } 555 }; 556 557 static void 558 fill_reject_code(u_short *codep, char *str) 559 { 560 int val; 561 char *s; 562 563 val = strtoul(str, &s, 0); 564 if (s == str || *s != '\0' || val >= 0x100) 565 val = match_token(icmpcodes, str); 566 if (val < 0) 567 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 568 *codep = val; 569 return; 570 } 571 572 static void 573 print_reject_code(u_int16_t code) 574 { 575 char *s = match_value(icmpcodes, code); 576 577 if (s != NULL) 578 printf("unreach %s", s); 579 else 580 printf("unreach %u", code); 581 } 582 583 /* 584 * Returns the number of bits set (from left) in a contiguous bitmask, 585 * or -1 if the mask is not contiguous. 586 * XXX this needs a proper fix. 587 * This effectively works on masks in big-endian (network) format. 588 * when compiled on little endian architectures. 589 * 590 * First bit is bit 7 of the first byte -- note, for MAC addresses, 591 * the first bit on the wire is bit 0 of the first byte. 592 * len is the max length in bits. 593 */ 594 static int 595 contigmask(u_char *p, int len) 596 { 597 int i, n; 598 for (i=0; i<len ; i++) 599 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 600 break; 601 for (n=i+1; n < len; n++) 602 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 603 return -1; /* mask not contiguous */ 604 return i; 605 } 606 607 /* 608 * print flags set/clear in the two bitmasks passed as parameters. 609 * There is a specialized check for f_tcpflags. 610 */ 611 static void 612 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 613 { 614 char *comma=""; 615 int i; 616 u_char set = cmd->arg1 & 0xff; 617 u_char clear = (cmd->arg1 >> 8) & 0xff; 618 619 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 620 printf(" setup"); 621 return; 622 } 623 624 printf(" %s ", name); 625 for (i=0; list[i].x != 0; i++) { 626 if (set & list[i].x) { 627 set &= ~list[i].x; 628 printf("%s%s", comma, list[i].s); 629 comma = ","; 630 } 631 if (clear & list[i].x) { 632 clear &= ~list[i].x; 633 printf("%s!%s", comma, list[i].s); 634 comma = ","; 635 } 636 } 637 } 638 639 /* 640 * Print the ip address contained in a command. 641 */ 642 static void 643 print_ip(ipfw_insn_ip *cmd, char *s) 644 { 645 struct hostent *he = NULL; 646 int mb; 647 648 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 649 650 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 651 printf("me"); 652 return; 653 } 654 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 655 u_int32_t x, *d; 656 int i; 657 char comma = '{'; 658 659 x = cmd->o.arg1 - 1; 660 x = htonl( ~x ); 661 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 662 printf("%s/%d", inet_ntoa(cmd->addr), 663 contigmask((u_char *)&x, 32)); 664 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 665 x &= 0xff; /* base */ 666 d = (u_int32_t *)&(cmd->mask); 667 for (i=0; i < cmd->o.arg1; i++) 668 if (d[ i/32] & (1<<(i & 31))) { 669 printf("%c%d", comma, i+x); 670 comma = ','; 671 } 672 printf("}"); 673 return; 674 } 675 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 676 mb = 32; 677 else 678 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 679 if (mb == 32 && do_resolv) 680 he = gethostbyaddr((char *)&(cmd->addr.s_addr), 681 sizeof(u_long), AF_INET); 682 if (he != NULL) /* resolved to name */ 683 printf("%s", he->h_name); 684 else if (mb == 0) /* any */ 685 printf("any"); 686 else { /* numeric IP followed by some kind of mask */ 687 printf("%s", inet_ntoa(cmd->addr)); 688 if (mb < 0) 689 printf(":%s", inet_ntoa(cmd->mask)); 690 else if (mb < 32) 691 printf("/%d", mb); 692 } 693 } 694 695 /* 696 * prints a MAC address/mask pair 697 */ 698 static void 699 print_mac(u_char *addr, u_char *mask) 700 { 701 int l = contigmask(mask, 48); 702 703 if (l == 0) 704 printf(" any"); 705 else { 706 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 707 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 708 if (l == -1) 709 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 710 mask[0], mask[1], mask[2], 711 mask[3], mask[4], mask[5]); 712 else if (l < 48) 713 printf("/%d", l); 714 } 715 } 716 717 static void 718 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 719 { 720 u_int8_t type; 721 722 cmd->d[0] = 0; 723 while (*av) { 724 if (*av == ',') 725 av++; 726 727 type = strtoul(av, &av, 0); 728 729 if (*av != ',' && *av != '\0') 730 errx(EX_DATAERR, "invalid ICMP type"); 731 732 if (type > 31) 733 errx(EX_DATAERR, "ICMP type out of range"); 734 735 cmd->d[0] |= 1 << type; 736 } 737 cmd->o.opcode = O_ICMPTYPE; 738 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 739 } 740 741 static void 742 print_icmptypes(ipfw_insn_u32 *cmd) 743 { 744 int i; 745 char sep= ' '; 746 747 printf(" icmptypes"); 748 for (i = 0; i < 32; i++) { 749 if ( (cmd->d[0] & (1 << (i))) == 0) 750 continue; 751 printf("%c%d", sep, i); 752 sep = ','; 753 } 754 } 755 756 /* 757 * show_ipfw() prints the body of an ipfw rule. 758 * Because the standard rule has at least proto src_ip dst_ip, we use 759 * a helper function to produce these entries if not provided explicitly. 760 * The first argument is the list of fields we have, the second is 761 * the list of fields we want to be printed. 762 * 763 * Special cases if we have provided a MAC header: 764 * + if the rule does not contain IP addresses/ports, do not print them; 765 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 766 * 767 * Once we have 'have_options', IP header fields are printed as options. 768 */ 769 #define HAVE_PROTO 0x0001 770 #define HAVE_SRCIP 0x0002 771 #define HAVE_DSTIP 0x0004 772 #define HAVE_MAC 0x0008 773 #define HAVE_MACTYPE 0x0010 774 #define HAVE_OPTIONS 0x8000 775 776 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 777 static void 778 show_prerequisites(int *flags, int want, int cmd) 779 { 780 if ( (*flags & HAVE_IP) == HAVE_IP) 781 *flags |= HAVE_OPTIONS; 782 783 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 784 cmd != O_MAC_TYPE) { 785 /* 786 * mac-type was optimized out by the compiler, 787 * restore it 788 */ 789 printf(" any"); 790 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 791 return; 792 } 793 if ( !(*flags & HAVE_OPTIONS)) { 794 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 795 printf(" ip"); 796 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 797 printf(" from any"); 798 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 799 printf(" to any"); 800 } 801 *flags |= want; 802 } 803 804 static void 805 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 806 { 807 static int twidth = 0; 808 int l; 809 ipfw_insn *cmd; 810 int proto = 0; /* default */ 811 int flags = 0; /* prerequisites */ 812 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 813 int or_block = 0; /* we are in an or block */ 814 815 u_int32_t set_disable = (u_int32_t)(rule->next_rule); 816 817 if (set_disable & (1 << rule->set)) { /* disabled */ 818 if (!show_sets) 819 return; 820 else 821 printf("# DISABLED "); 822 } 823 printf("%05u ", rule->rulenum); 824 825 if (do_acct) 826 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth, 827 rule->bcnt); 828 829 if (do_time) { 830 char timestr[30]; 831 832 if (twidth == 0) { 833 strcpy(timestr, ctime((time_t *)&twidth)); 834 *strchr(timestr, '\n') = '\0'; 835 twidth = strlen(timestr); 836 } 837 if (rule->timestamp) { 838 #if _FreeBSD_version < 500000 /* XXX check */ 839 #define _long_to_time(x) (time_t)(x) 840 #endif 841 time_t t = _long_to_time(rule->timestamp); 842 843 strcpy(timestr, ctime(&t)); 844 *strchr(timestr, '\n') = '\0'; 845 printf("%s ", timestr); 846 } else { 847 printf("%*s ", twidth, " "); 848 } 849 } 850 851 if (show_sets) 852 printf("set %d ", rule->set); 853 854 /* 855 * print the optional "match probability" 856 */ 857 if (rule->cmd_len > 0) { 858 cmd = rule->cmd ; 859 if (cmd->opcode == O_PROB) { 860 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 861 double d = 1.0 * p->d[0]; 862 863 d = (d / 0x7fffffff); 864 printf("prob %f ", d); 865 } 866 } 867 868 /* 869 * first print actions 870 */ 871 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 872 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 873 switch(cmd->opcode) { 874 case O_CHECK_STATE: 875 printf("check-state"); 876 flags = HAVE_IP; /* avoid printing anything else */ 877 break; 878 879 case O_ACCEPT: 880 printf("allow"); 881 break; 882 883 case O_COUNT: 884 printf("count"); 885 break; 886 887 case O_DENY: 888 printf("deny"); 889 break; 890 891 case O_REJECT: 892 if (cmd->arg1 == ICMP_REJECT_RST) 893 printf("reset"); 894 else if (cmd->arg1 == ICMP_UNREACH_HOST) 895 printf("reject"); 896 else 897 print_reject_code(cmd->arg1); 898 break; 899 900 case O_SKIPTO: 901 printf("skipto %u", cmd->arg1); 902 break; 903 904 case O_PIPE: 905 printf("pipe %u", cmd->arg1); 906 break; 907 908 case O_QUEUE: 909 printf("queue %u", cmd->arg1); 910 break; 911 912 case O_DIVERT: 913 printf("divert %u", cmd->arg1); 914 break; 915 916 case O_TEE: 917 printf("tee %u", cmd->arg1); 918 break; 919 920 case O_FORWARD_IP: 921 { 922 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 923 924 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 925 if (s->sa.sin_port) 926 printf(",%d", s->sa.sin_port); 927 } 928 break; 929 930 case O_LOG: /* O_LOG is printed last */ 931 logptr = (ipfw_insn_log *)cmd; 932 break; 933 934 default: 935 printf("** unrecognized action %d len %d", 936 cmd->opcode, cmd->len); 937 } 938 } 939 if (logptr) { 940 if (logptr->max_log > 0) 941 printf(" log logamount %d", logptr->max_log); 942 else 943 printf(" log"); 944 } 945 946 /* 947 * then print the body. 948 */ 949 if (rule->_pad & 1) { /* empty rules before options */ 950 if (!do_compact) 951 printf(" ip from any to any"); 952 flags |= HAVE_IP | HAVE_OPTIONS; 953 } 954 955 for (l = rule->act_ofs, cmd = rule->cmd ; 956 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 957 /* useful alias */ 958 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 959 960 show_prerequisites(&flags, 0, cmd->opcode); 961 962 switch(cmd->opcode) { 963 case O_PROB: 964 break; /* done already */ 965 966 case O_PROBE_STATE: 967 break; /* no need to print anything here */ 968 969 case O_MACADDR2: { 970 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 971 972 if ((cmd->len & F_OR) && !or_block) 973 printf(" {"); 974 if (cmd->len & F_NOT) 975 printf(" not"); 976 printf(" MAC"); 977 flags |= HAVE_MAC; 978 print_mac( m->addr, m->mask); 979 print_mac( m->addr + 6, m->mask + 6); 980 } 981 break; 982 983 case O_MAC_TYPE: 984 if ((cmd->len & F_OR) && !or_block) 985 printf(" {"); 986 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 987 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 988 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 989 break; 990 991 case O_IP_SRC: 992 case O_IP_SRC_MASK: 993 case O_IP_SRC_ME: 994 case O_IP_SRC_SET: 995 show_prerequisites(&flags, HAVE_PROTO, 0); 996 if (!(flags & HAVE_SRCIP)) 997 printf(" from"); 998 if ((cmd->len & F_OR) && !or_block) 999 printf(" {"); 1000 print_ip((ipfw_insn_ip *)cmd, 1001 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1002 flags |= HAVE_SRCIP; 1003 break; 1004 1005 case O_IP_DST: 1006 case O_IP_DST_MASK: 1007 case O_IP_DST_ME: 1008 case O_IP_DST_SET: 1009 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1010 if (!(flags & HAVE_DSTIP)) 1011 printf(" to"); 1012 if ((cmd->len & F_OR) && !or_block) 1013 printf(" {"); 1014 print_ip((ipfw_insn_ip *)cmd, 1015 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1016 flags |= HAVE_DSTIP; 1017 break; 1018 1019 case O_IP_DSTPORT: 1020 show_prerequisites(&flags, HAVE_IP, 0); 1021 case O_IP_SRCPORT: 1022 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1023 if ((cmd->len & F_OR) && !or_block) 1024 printf(" {"); 1025 print_newports((ipfw_insn_u16 *)cmd, proto, 1026 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1027 break; 1028 1029 case O_PROTO: { 1030 struct protoent *pe; 1031 1032 if ((cmd->len & F_OR) && !or_block) 1033 printf(" {"); 1034 if (cmd->len & F_NOT) 1035 printf(" not"); 1036 proto = cmd->arg1; 1037 pe = getprotobynumber(cmd->arg1); 1038 if (flags & HAVE_OPTIONS) 1039 printf(" proto"); 1040 if (pe) 1041 printf(" %s", pe->p_name); 1042 else 1043 printf(" %u", cmd->arg1); 1044 } 1045 flags |= HAVE_PROTO; 1046 break; 1047 1048 default: /*options ... */ 1049 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1050 if ((cmd->len & F_OR) && !or_block) 1051 printf(" {"); 1052 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1053 printf(" not"); 1054 switch(cmd->opcode) { 1055 case O_FRAG: 1056 printf(" frag"); 1057 break; 1058 1059 case O_IN: 1060 printf(cmd->len & F_NOT ? " out" : " in"); 1061 break; 1062 1063 case O_LAYER2: 1064 printf(" layer2"); 1065 break; 1066 case O_XMIT: 1067 case O_RECV: 1068 case O_VIA: { 1069 char *s; 1070 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1071 1072 if (cmd->opcode == O_XMIT) 1073 s = "xmit"; 1074 else if (cmd->opcode == O_RECV) 1075 s = "recv"; 1076 else if (cmd->opcode == O_VIA) 1077 s = "via"; 1078 else 1079 s = "?huh?"; 1080 if (cmdif->name[0] == '\0') 1081 printf(" %s %s", s, 1082 inet_ntoa(cmdif->p.ip)); 1083 printf(" %s %s", s, cmdif->name); 1084 } 1085 break; 1086 1087 case O_IPID: 1088 printf(" ipid %u", cmd->arg1 ); 1089 break; 1090 1091 case O_IPTTL: 1092 printf(" ipttl %u", cmd->arg1 ); 1093 break; 1094 1095 case O_IPVER: 1096 printf(" ipver %u", cmd->arg1 ); 1097 break; 1098 1099 case O_IPPRECEDENCE: 1100 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1101 break; 1102 1103 case O_IPLEN: 1104 printf(" iplen %u", cmd->arg1 ); 1105 break; 1106 1107 case O_IPOPT: 1108 print_flags("ipoptions", cmd, f_ipopts); 1109 break; 1110 1111 case O_IPTOS: 1112 print_flags("iptos", cmd, f_iptos); 1113 break; 1114 1115 case O_ICMPTYPE: 1116 print_icmptypes((ipfw_insn_u32 *)cmd); 1117 break; 1118 1119 case O_ESTAB: 1120 printf(" established"); 1121 break; 1122 1123 case O_TCPFLAGS: 1124 print_flags("tcpflags", cmd, f_tcpflags); 1125 break; 1126 1127 case O_TCPOPTS: 1128 print_flags("tcpoptions", cmd, f_tcpopts); 1129 break; 1130 1131 case O_TCPWIN: 1132 printf(" tcpwin %d", ntohs(cmd->arg1)); 1133 break; 1134 1135 case O_TCPACK: 1136 printf(" tcpack %ld", ntohl(cmd32->d[0])); 1137 break; 1138 1139 case O_TCPSEQ: 1140 printf(" tcpseq %ld", ntohl(cmd32->d[0])); 1141 break; 1142 1143 case O_UID: 1144 { 1145 struct passwd *pwd = getpwuid(cmd32->d[0]); 1146 1147 if (pwd) 1148 printf(" uid %s", pwd->pw_name); 1149 else 1150 printf(" uid %u", cmd32->d[0]); 1151 } 1152 break; 1153 1154 case O_GID: 1155 { 1156 struct group *grp = getgrgid(cmd32->d[0]); 1157 1158 if (grp) 1159 printf(" gid %s", grp->gr_name); 1160 else 1161 printf(" gid %u", cmd32->d[0]); 1162 } 1163 break; 1164 1165 case O_KEEP_STATE: 1166 printf(" keep-state"); 1167 break; 1168 1169 case O_LIMIT: 1170 { 1171 struct _s_x *p = limit_masks; 1172 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1173 u_int8_t x = c->limit_mask; 1174 char *comma = " "; 1175 1176 printf(" limit"); 1177 for ( ; p->x != 0 ; p++) 1178 if ((x & p->x) == p->x) { 1179 x &= ~p->x; 1180 printf("%s%s", comma, p->s); 1181 comma = ","; 1182 } 1183 printf(" %d", c->conn_limit); 1184 } 1185 break; 1186 1187 default: 1188 printf(" [opcode %d len %d]", 1189 cmd->opcode, cmd->len); 1190 } 1191 } 1192 if (cmd->len & F_OR) { 1193 printf(" or"); 1194 or_block = 1; 1195 } else if (or_block) { 1196 printf(" }"); 1197 or_block = 0; 1198 } 1199 } 1200 show_prerequisites(&flags, HAVE_IP, 0); 1201 1202 printf("\n"); 1203 } 1204 1205 static void 1206 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1207 { 1208 struct protoent *pe; 1209 struct in_addr a; 1210 1211 if (!do_expired) { 1212 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1213 return; 1214 } 1215 1216 printf("%05d %*llu %*llu (%ds)", (int)(d->rule), pcwidth, d->pcnt, 1217 bcwidth, d->bcnt, d->expire); 1218 switch (d->dyn_type) { 1219 case O_LIMIT_PARENT: 1220 printf(" PARENT %d", d->count); 1221 break; 1222 case O_LIMIT: 1223 printf(" LIMIT"); 1224 break; 1225 case O_KEEP_STATE: /* bidir, no mask */ 1226 printf(" STATE"); 1227 break; 1228 } 1229 1230 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1231 printf(" %s", pe->p_name); 1232 else 1233 printf(" proto %u", d->id.proto); 1234 1235 a.s_addr = htonl(d->id.src_ip); 1236 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1237 1238 a.s_addr = htonl(d->id.dst_ip); 1239 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1240 printf("\n"); 1241 } 1242 1243 int 1244 sort_q(const void *pa, const void *pb) 1245 { 1246 int rev = (do_sort < 0); 1247 int field = rev ? -do_sort : do_sort; 1248 long long res = 0; 1249 const struct dn_flow_queue *a = pa; 1250 const struct dn_flow_queue *b = pb; 1251 1252 switch (field) { 1253 case 1: /* pkts */ 1254 res = a->len - b->len; 1255 break; 1256 case 2: /* bytes */ 1257 res = a->len_bytes - b->len_bytes; 1258 break; 1259 1260 case 3: /* tot pkts */ 1261 res = a->tot_pkts - b->tot_pkts; 1262 break; 1263 1264 case 4: /* tot bytes */ 1265 res = a->tot_bytes - b->tot_bytes; 1266 break; 1267 } 1268 if (res < 0) 1269 res = -1; 1270 if (res > 0) 1271 res = 1; 1272 return (int)(rev ? res : -res); 1273 } 1274 1275 static void 1276 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1277 { 1278 int l; 1279 1280 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1281 fs->flow_mask.proto, 1282 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1283 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1284 if (fs->rq_elements == 0) 1285 return; 1286 1287 printf("BKT Prot ___Source IP/port____ " 1288 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1289 if (do_sort != 0) 1290 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1291 for (l = 0; l < fs->rq_elements; l++) { 1292 struct in_addr ina; 1293 struct protoent *pe; 1294 1295 ina.s_addr = htonl(q[l].id.src_ip); 1296 printf("%3d ", q[l].hash_slot); 1297 pe = getprotobynumber(q[l].id.proto); 1298 if (pe) 1299 printf("%-4s ", pe->p_name); 1300 else 1301 printf("%4u ", q[l].id.proto); 1302 printf("%15s/%-5d ", 1303 inet_ntoa(ina), q[l].id.src_port); 1304 ina.s_addr = htonl(q[l].id.dst_ip); 1305 printf("%15s/%-5d ", 1306 inet_ntoa(ina), q[l].id.dst_port); 1307 printf("%4qu %8qu %2u %4u %3u\n", 1308 q[l].tot_pkts, q[l].tot_bytes, 1309 q[l].len, q[l].len_bytes, q[l].drops); 1310 if (verbose) 1311 printf(" S %20qd F %20qd\n", 1312 q[l].S, q[l].F); 1313 } 1314 } 1315 1316 static void 1317 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 1318 { 1319 int l; 1320 char qs[30]; 1321 char plr[30]; 1322 char red[90]; /* Display RED parameters */ 1323 1324 l = fs->qsize; 1325 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1326 if (l >= 8192) 1327 sprintf(qs, "%d KB", l / 1024); 1328 else 1329 sprintf(qs, "%d B", l); 1330 } else 1331 sprintf(qs, "%3d sl.", l); 1332 if (fs->plr) 1333 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1334 else 1335 plr[0] = '\0'; 1336 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1337 sprintf(red, 1338 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1339 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1340 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1341 SCALE_VAL(fs->min_th), 1342 SCALE_VAL(fs->max_th), 1343 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1344 else 1345 sprintf(red, "droptail"); 1346 1347 printf("%s %s%s %d queues (%d buckets) %s\n", 1348 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1349 } 1350 1351 static void 1352 list_pipes(void *data, int nbytes, int ac, char *av[]) 1353 { 1354 u_long rulenum; 1355 void *next = data; 1356 struct dn_pipe *p = (struct dn_pipe *) data; 1357 struct dn_flow_set *fs; 1358 struct dn_flow_queue *q; 1359 int l; 1360 1361 if (ac > 0) 1362 rulenum = strtoul(*av++, NULL, 10); 1363 else 1364 rulenum = 0; 1365 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 1366 double b = p->bandwidth; 1367 char buf[30]; 1368 char prefix[80]; 1369 1370 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 1371 break; /* done with pipes, now queues */ 1372 1373 /* 1374 * compute length, as pipe have variable size 1375 */ 1376 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1377 next = (void *)p + l; 1378 nbytes -= l; 1379 1380 if (rulenum != 0 && rulenum != p->pipe_nr) 1381 continue; 1382 1383 /* 1384 * Print rate (or clocking interface) 1385 */ 1386 if (p->if_name[0] != '\0') 1387 sprintf(buf, "%s", p->if_name); 1388 else if (b == 0) 1389 sprintf(buf, "unlimited"); 1390 else if (b >= 1000000) 1391 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1392 else if (b >= 1000) 1393 sprintf(buf, "%7.3f Kbit/s", b/1000); 1394 else 1395 sprintf(buf, "%7.3f bit/s ", b); 1396 1397 sprintf(prefix, "%05d: %s %4d ms ", 1398 p->pipe_nr, buf, p->delay); 1399 print_flowset_parms(&(p->fs), prefix); 1400 if (verbose) 1401 printf(" V %20qd\n", p->V >> MY_M); 1402 1403 q = (struct dn_flow_queue *)(p+1); 1404 list_queues(&(p->fs), q); 1405 } 1406 for (fs = next; nbytes >= sizeof *fs; fs = next) { 1407 char prefix[80]; 1408 1409 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 1410 break; 1411 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1412 next = (void *)fs + l; 1413 nbytes -= l; 1414 q = (struct dn_flow_queue *)(fs+1); 1415 sprintf(prefix, "q%05d: weight %d pipe %d ", 1416 fs->fs_nr, fs->weight, fs->parent_nr); 1417 print_flowset_parms(fs, prefix); 1418 list_queues(fs, q); 1419 } 1420 } 1421 1422 /* 1423 * This one handles all set-related commands 1424 * ipfw set { show | enable | disable } 1425 * ipfw set swap X Y 1426 * ipfw set move X to Y 1427 * ipfw set move rule X to Y 1428 */ 1429 static void 1430 sets_handler(int ac, char *av[]) 1431 { 1432 u_int32_t set_disable, masks[2]; 1433 int i, nbytes; 1434 u_int16_t rulenum; 1435 u_int8_t cmd, new_set; 1436 1437 ac--; 1438 av++; 1439 1440 if (!ac) 1441 errx(EX_USAGE, "set needs command"); 1442 if (!strncmp(*av, "show", strlen(*av)) ) { 1443 void *data; 1444 char *msg; 1445 1446 nbytes = sizeof(struct ip_fw); 1447 if ((data = malloc(nbytes)) == NULL) 1448 err(EX_OSERR, "malloc"); 1449 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1450 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1451 set_disable = (u_int32_t)(((struct ip_fw *)data)->next_rule); 1452 1453 for (i = 0, msg = "disable" ; i < 31; i++) 1454 if ( (set_disable & (1<<i))) { 1455 printf("%s %d", msg, i); 1456 msg = ""; 1457 } 1458 msg = (set_disable) ? " enable" : "enable"; 1459 for (i = 0; i < 31; i++) 1460 if ( !(set_disable & (1<<i))) { 1461 printf("%s %d", msg, i); 1462 msg = ""; 1463 } 1464 printf("\n"); 1465 } else if (!strncmp(*av, "swap", strlen(*av))) { 1466 ac--; av++; 1467 if (ac != 2) 1468 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1469 rulenum = atoi(av[0]); 1470 new_set = atoi(av[1]); 1471 if (!isdigit(*(av[0])) || rulenum > 30) 1472 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1473 if (!isdigit(*(av[1])) || new_set > 30) 1474 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1475 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1476 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1477 masks, sizeof(u_int32_t)); 1478 } else if (!strncmp(*av, "move", strlen(*av))) { 1479 ac--; av++; 1480 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1481 cmd = 2; 1482 ac--; av++; 1483 } else 1484 cmd = 3; 1485 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1486 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1487 rulenum = atoi(av[0]); 1488 new_set = atoi(av[2]); 1489 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1490 (cmd == 2 && rulenum == 65535) ) 1491 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1492 if (!isdigit(*(av[2])) || new_set > 30) 1493 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1494 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1495 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1496 masks, sizeof(u_int32_t)); 1497 } else if (!strncmp(*av, "disable", strlen(*av)) || 1498 !strncmp(*av, "enable", strlen(*av)) ) { 1499 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1500 1501 ac--; av++; 1502 masks[0] = masks[1] = 0; 1503 1504 while (ac) { 1505 if (isdigit(**av)) { 1506 i = atoi(*av); 1507 if (i < 0 || i > 30) 1508 errx(EX_DATAERR, 1509 "invalid set number %d\n", i); 1510 masks[which] |= (1<<i); 1511 } else if (!strncmp(*av, "disable", strlen(*av))) 1512 which = 0; 1513 else if (!strncmp(*av, "enable", strlen(*av))) 1514 which = 1; 1515 else 1516 errx(EX_DATAERR, 1517 "invalid set command %s\n", *av); 1518 av++; ac--; 1519 } 1520 if ( (masks[0] & masks[1]) != 0 ) 1521 errx(EX_DATAERR, 1522 "cannot enable and disable the same set\n"); 1523 1524 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1525 if (i) 1526 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1527 } else 1528 errx(EX_USAGE, "invalid set command %s\n", *av); 1529 } 1530 1531 static void 1532 sysctl_handler(int ac, char *av[], int which) 1533 { 1534 ac--; 1535 av++; 1536 1537 if (*av == NULL) { 1538 warnx("missing keyword to enable/disable\n"); 1539 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1540 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1541 &which, sizeof(which)); 1542 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1543 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1544 &which, sizeof(which)); 1545 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1546 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1547 &which, sizeof(which)); 1548 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1549 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1550 &which, sizeof(which)); 1551 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1552 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1553 &which, sizeof(which)); 1554 } else { 1555 warnx("unrecognize enable/disable keyword: %s\n", *av); 1556 } 1557 } 1558 1559 static void 1560 list(int ac, char *av[]) 1561 { 1562 struct ip_fw *r; 1563 ipfw_dyn_rule *dynrules, *d; 1564 1565 void *lim, *data = NULL; 1566 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1567 int exitval = EX_OK; 1568 int lac; 1569 char **lav; 1570 u_long rnum; 1571 char *endptr; 1572 int seen = 0; 1573 1574 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1575 int nalloc = 1024; /* start somewhere... */ 1576 1577 ac--; 1578 av++; 1579 1580 /* get rules or pipes from kernel, resizing array as necessary */ 1581 nbytes = nalloc; 1582 1583 while (nbytes >= nalloc) { 1584 nalloc = nalloc * 2 + 200; 1585 nbytes = nalloc; 1586 if ((data = realloc(data, nbytes)) == NULL) 1587 err(EX_OSERR, "realloc"); 1588 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1589 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1590 do_pipe ? "DUMMYNET" : "FW"); 1591 } 1592 1593 if (do_pipe) { 1594 list_pipes(data, nbytes, ac, av); 1595 goto done; 1596 } 1597 1598 /* 1599 * Count static rules. They have variable size so we 1600 * need to scan the list to count them. 1601 */ 1602 for (nstat = 1, r = data, lim = data + nbytes; 1603 r->rulenum < 65535 && (void *)r < lim; 1604 ++nstat, r = (void *)r + RULESIZE(r) ) 1605 ; /* nothing */ 1606 1607 /* 1608 * Count dynamic rules. This is easier as they have 1609 * fixed size. 1610 */ 1611 r = (void *)r + RULESIZE(r); 1612 dynrules = (ipfw_dyn_rule *)r ; 1613 n = (void *)r - data; 1614 ndyn = (nbytes - n) / sizeof *dynrules; 1615 1616 /* if showing stats, figure out column widths ahead of time */ 1617 bcwidth = pcwidth = 0; 1618 if (do_acct) { 1619 for (n = 0, r = data; n < nstat; 1620 n++, r = (void *)r + RULESIZE(r)) { 1621 /* packet counter */ 1622 width = snprintf(NULL, 0, "%llu", r->pcnt); 1623 if (width > pcwidth) 1624 pcwidth = width; 1625 1626 /* byte counter */ 1627 width = snprintf(NULL, 0, "%llu", r->bcnt); 1628 if (width > bcwidth) 1629 bcwidth = width; 1630 } 1631 } 1632 if (do_dynamic && ndyn) { 1633 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1634 width = snprintf(NULL, 0, "%llu", d->pcnt); 1635 if (width > pcwidth) 1636 pcwidth = width; 1637 1638 width = snprintf(NULL, 0, "%llu", d->bcnt); 1639 if (width > bcwidth) 1640 bcwidth = width; 1641 } 1642 } 1643 /* if no rule numbers were specified, list all rules */ 1644 if (ac == 0) { 1645 for (n = 0, r = data; n < nstat; 1646 n++, r = (void *)r + RULESIZE(r) ) 1647 show_ipfw(r, pcwidth, bcwidth); 1648 1649 if (do_dynamic && ndyn) { 1650 printf("## Dynamic rules (%d):\n", ndyn); 1651 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1652 show_dyn_ipfw(d, pcwidth, bcwidth); 1653 } 1654 goto done; 1655 } 1656 1657 /* display specific rules requested on command line */ 1658 1659 for (lac = ac, lav = av; lac != 0; lac--) { 1660 /* convert command line rule # */ 1661 rnum = strtoul(*lav++, &endptr, 10); 1662 if (*endptr) { 1663 exitval = EX_USAGE; 1664 warnx("invalid rule number: %s", *(lav - 1)); 1665 continue; 1666 } 1667 for (n = seen = 0, r = data; n < nstat; 1668 n++, r = (void *)r + RULESIZE(r) ) { 1669 if (r->rulenum > rnum) 1670 break; 1671 if (r->rulenum == rnum) { 1672 show_ipfw(r, pcwidth, bcwidth); 1673 seen = 1; 1674 } 1675 } 1676 if (!seen) { 1677 /* give precedence to other error(s) */ 1678 if (exitval == EX_OK) 1679 exitval = EX_UNAVAILABLE; 1680 warnx("rule %lu does not exist", rnum); 1681 } 1682 } 1683 1684 if (do_dynamic && ndyn) { 1685 printf("## Dynamic rules:\n"); 1686 for (lac = ac, lav = av; lac != 0; lac--) { 1687 rnum = strtoul(*lav++, &endptr, 10); 1688 if (*endptr) 1689 /* already warned */ 1690 continue; 1691 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1692 if ((int)(d->rule) > rnum) 1693 break; 1694 if ((int)(d->rule) == rnum) 1695 show_dyn_ipfw(d, pcwidth, bcwidth); 1696 } 1697 } 1698 } 1699 1700 ac = 0; 1701 1702 done: 1703 free(data); 1704 1705 if (exitval != EX_OK) 1706 exit(exitval); 1707 } 1708 1709 static void 1710 show_usage(void) 1711 { 1712 fprintf(stderr, "usage: ipfw [options]\n" 1713 " add [number] rule\n" 1714 " pipe number config [pipeconfig]\n" 1715 " queue number config [queueconfig]\n" 1716 " [pipe] flush\n" 1717 " [pipe] delete number ...\n" 1718 " [pipe] {list|show} [number ...]\n" 1719 " {zero|resetlog} [number ...]\n" 1720 "do \"ipfw -h\" or see ipfw manpage for details\n" 1721 ); 1722 1723 exit(EX_USAGE); 1724 } 1725 1726 static void 1727 help(void) 1728 { 1729 1730 fprintf(stderr, "ipfw syntax summary:\n" 1731 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1732 "ipfw {pipe|queue} N config BODY\n" 1733 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1734 "\n" 1735 "RULE: [1..] [PROB] BODY\n" 1736 "RULENUM: INTEGER(1..65534)\n" 1737 "PROB: prob REAL(0..1)\n" 1738 "BODY: check-state [LOG] (no body) |\n" 1739 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1740 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1741 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1742 "ADDR: [ MAC dst src ether_type ] \n" 1743 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1744 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1745 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1746 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1747 ); 1748 exit(0); 1749 } 1750 1751 1752 static int 1753 lookup_host (char *host, struct in_addr *ipaddr) 1754 { 1755 struct hostent *he; 1756 1757 if (!inet_aton(host, ipaddr)) { 1758 if ((he = gethostbyname(host)) == NULL) 1759 return(-1); 1760 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1761 } 1762 return(0); 1763 } 1764 1765 /* 1766 * fills the addr and mask fields in the instruction as appropriate from av. 1767 * Update length as appropriate. 1768 * The following formats are allowed: 1769 * any matches any IP. Actually returns an empty instruction. 1770 * me returns O_IP_*_ME 1771 * 1.2.3.4 single IP address 1772 * 1.2.3.4:5.6.7.8 address:mask 1773 * 1.2.3.4/24 address/mask 1774 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1775 */ 1776 static void 1777 fill_ip(ipfw_insn_ip *cmd, char *av) 1778 { 1779 char *p = 0, md = 0; 1780 u_int32_t i; 1781 1782 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1783 1784 if (!strncmp(av, "any", strlen(av))) 1785 return; 1786 1787 if (!strncmp(av, "me", strlen(av))) { 1788 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1789 return; 1790 } 1791 1792 p = strchr(av, '/'); 1793 if (!p) 1794 p = strchr(av, ':'); 1795 if (p) { 1796 md = *p; 1797 *p++ = '\0'; 1798 } 1799 1800 if (lookup_host(av, &cmd->addr) != 0) 1801 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1802 switch (md) { 1803 case ':': 1804 if (!inet_aton(p, &cmd->mask)) 1805 errx(EX_DATAERR, "bad netmask ``%s''", p); 1806 break; 1807 case '/': 1808 i = atoi(p); 1809 if (i == 0) 1810 cmd->mask.s_addr = htonl(0); 1811 else if (i > 32) 1812 errx(EX_DATAERR, "bad width ``%s''", p); 1813 else 1814 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1815 break; 1816 default: 1817 cmd->mask.s_addr = htonl(~0); 1818 break; 1819 } 1820 cmd->addr.s_addr &= cmd->mask.s_addr; 1821 /* 1822 * now look if we have a set of addresses. They are stored as follows: 1823 * arg1 is the set size (powers of 2, 2..256) 1824 * addr is the base address IN HOST FORMAT 1825 * mask.. is an array of u_int32_t with bits set. 1826 */ 1827 if (p) 1828 p = strchr(p, '{'); 1829 if (p) { /* fetch addresses */ 1830 u_int32_t *d; 1831 int low, high; 1832 int i = contigmask((u_char *)&(cmd->mask), 32); 1833 1834 if (i < 24 || i > 31) { 1835 fprintf(stderr, "invalid set with mask %d\n", 1836 i); 1837 exit(0); 1838 } 1839 cmd->o.arg1 = 1<<(32-i); 1840 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1841 d = (u_int32_t *)&cmd->mask; 1842 cmd->o.opcode = O_IP_DST_SET; /* default */ 1843 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1844 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1845 d[i] = 0; /* clear masks */ 1846 1847 av = p+1; 1848 low = cmd->addr.s_addr & 0xff; 1849 high = low + cmd->o.arg1 - 1; 1850 while (isdigit(*av)) { 1851 char *s; 1852 u_int16_t a = strtol(av, &s, 0); 1853 1854 if (s == av) /* no parameter */ 1855 break; 1856 if (a < low || a > high) { 1857 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1858 a, low, high); 1859 exit(0); 1860 } 1861 a -= low; 1862 d[ a/32] |= 1<<(a & 31); 1863 if (*s != ',') 1864 break; 1865 av = s+1; 1866 } 1867 return; 1868 } 1869 1870 if (cmd->mask.s_addr == 0) { /* any */ 1871 if (cmd->o.len & F_NOT) 1872 errx(EX_DATAERR, "not any never matches"); 1873 else /* useless, nuke it */ 1874 return; 1875 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1876 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1877 else /* addr/mask */ 1878 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1879 } 1880 1881 1882 /* 1883 * helper function to process a set of flags and set bits in the 1884 * appropriate masks. 1885 */ 1886 static void 1887 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1888 struct _s_x *flags, char *p) 1889 { 1890 u_int8_t set=0, clear=0; 1891 1892 while (p && *p) { 1893 char *q; /* points to the separator */ 1894 int val; 1895 u_int8_t *which; /* mask we are working on */ 1896 1897 if (*p == '!') { 1898 p++; 1899 which = &clear; 1900 } else 1901 which = &set; 1902 q = strchr(p, ','); 1903 if (q) 1904 *q++ = '\0'; 1905 val = match_token(flags, p); 1906 if (val <= 0) 1907 errx(EX_DATAERR, "invalid flag %s", p); 1908 *which |= (u_int8_t)val; 1909 p = q; 1910 } 1911 cmd->opcode = opcode; 1912 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 1913 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 1914 } 1915 1916 1917 static void 1918 delete(int ac, char *av[]) 1919 { 1920 u_int32_t rulenum; 1921 struct dn_pipe pipe; 1922 int i; 1923 int exitval = EX_OK; 1924 int do_set = 0; 1925 1926 memset(&pipe, 0, sizeof pipe); 1927 1928 av++; ac--; 1929 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 1930 do_set = 1; /* delete set */ 1931 ac--; av++; 1932 } 1933 1934 /* Rule number */ 1935 while (ac && isdigit(**av)) { 1936 i = atoi(*av); av++; ac--; 1937 if (do_pipe) { 1938 if (do_pipe == 1) 1939 pipe.pipe_nr = i; 1940 else 1941 pipe.fs.fs_nr = i; 1942 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 1943 &pipe, sizeof pipe); 1944 if (i) { 1945 exitval = 1; 1946 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 1947 do_pipe == 1 ? pipe.pipe_nr : 1948 pipe.fs.fs_nr); 1949 } 1950 } else { 1951 rulenum = (i & 0xffff) | (do_set << 24); 1952 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 1953 sizeof rulenum); 1954 if (i) { 1955 exitval = EX_UNAVAILABLE; 1956 warn("rule %u: setsockopt(IP_FW_DEL)", 1957 rulenum); 1958 } 1959 } 1960 } 1961 if (exitval != EX_OK) 1962 exit(exitval); 1963 } 1964 1965 1966 /* 1967 * fill the interface structure. We do not check the name as we can 1968 * create interfaces dynamically, so checking them at insert time 1969 * makes relatively little sense. 1970 * Interface names containing '*', '?', or '[' are assumed to be shell 1971 * patterns which match interfaces. 1972 */ 1973 static void 1974 fill_iface(ipfw_insn_if *cmd, char *arg) 1975 { 1976 cmd->name[0] = '\0'; 1977 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 1978 1979 /* Parse the interface or address */ 1980 if (!strcmp(arg, "any")) 1981 cmd->o.len = 0; /* effectively ignore this command */ 1982 else if (!isdigit(*arg)) { 1983 strlcpy(cmd->name, arg, sizeof(cmd->name)); 1984 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 1985 } else if (!inet_aton(arg, &cmd->p.ip)) 1986 errx(EX_DATAERR, "bad ip address ``%s''", arg); 1987 } 1988 1989 static unsigned long 1990 getbw(const char *str, u_short *flags, int kb) 1991 { 1992 char *end; 1993 unsigned long val; 1994 int inbytes = 0; 1995 1996 val = strtoul(str, &end, 0); 1997 if (*end == 'k' || *end == 'K') { 1998 ++end; 1999 val *= kb; 2000 } else if (*end == 'm' || *end == 'M') { 2001 ++end; 2002 val *= kb * kb; 2003 } 2004 2005 /* 2006 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 2007 * trailer assume bits. 2008 */ 2009 if (strncasecmp(end, "bit", 3) == 0) { 2010 ; 2011 } else if (strncasecmp(end, "byte", 4) == 0) { 2012 inbytes = 1; 2013 } else if (*end == 'b') { 2014 ; 2015 } else if (*end == 'B') { 2016 inbytes = 1; 2017 } 2018 2019 /* 2020 * Return in bits if flags is NULL, else flag bits 2021 * or bytes in flags and return the unconverted value. 2022 */ 2023 if (inbytes && flags) 2024 *flags |= DN_QSIZE_IS_BYTES; 2025 else if (inbytes && flags == NULL) 2026 val *= 8; 2027 return(val); 2028 } 2029 2030 /* 2031 * the following macro returns an error message if we run out of 2032 * arguments. 2033 */ 2034 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2035 2036 static void 2037 config_pipe(int ac, char **av) 2038 { 2039 struct dn_pipe pipe; 2040 int i; 2041 char *end; 2042 u_int32_t a; 2043 void *par = NULL; 2044 2045 memset(&pipe, 0, sizeof pipe); 2046 2047 av++; ac--; 2048 /* Pipe number */ 2049 if (ac && isdigit(**av)) { 2050 i = atoi(*av); av++; ac--; 2051 if (do_pipe == 1) 2052 pipe.pipe_nr = i; 2053 else 2054 pipe.fs.fs_nr = i; 2055 } 2056 while (ac > 0) { 2057 double d; 2058 int tok = match_token(dummynet_params, *av); 2059 ac--; av++; 2060 2061 switch(tok) { 2062 case TOK_NOERROR: 2063 pipe.fs.flags_fs |= DN_NOERROR; 2064 break; 2065 2066 case TOK_PLR: 2067 NEED1("plr needs argument 0..1\n"); 2068 d = strtod(av[0], NULL); 2069 if (d > 1) 2070 d = 1; 2071 else if (d < 0) 2072 d = 0; 2073 pipe.fs.plr = (int)(d*0x7fffffff); 2074 ac--; av++; 2075 break; 2076 2077 case TOK_QUEUE: 2078 NEED1("queue needs queue size\n"); 2079 end = NULL; 2080 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2081 ac--; av++; 2082 break; 2083 2084 case TOK_BUCKETS: 2085 NEED1("buckets needs argument\n"); 2086 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2087 ac--; av++; 2088 break; 2089 2090 case TOK_MASK: 2091 NEED1("mask needs mask specifier\n"); 2092 /* 2093 * per-flow queue, mask is dst_ip, dst_port, 2094 * src_ip, src_port, proto measured in bits 2095 */ 2096 par = NULL; 2097 2098 pipe.fs.flow_mask.dst_ip = 0; 2099 pipe.fs.flow_mask.src_ip = 0; 2100 pipe.fs.flow_mask.dst_port = 0; 2101 pipe.fs.flow_mask.src_port = 0; 2102 pipe.fs.flow_mask.proto = 0; 2103 end = NULL; 2104 2105 while (ac >= 1) { 2106 u_int32_t *p32 = NULL; 2107 u_int16_t *p16 = NULL; 2108 2109 tok = match_token(dummynet_params, *av); 2110 ac--; av++; 2111 switch(tok) { 2112 case TOK_ALL: 2113 /* 2114 * special case, all bits significant 2115 */ 2116 pipe.fs.flow_mask.dst_ip = ~0; 2117 pipe.fs.flow_mask.src_ip = ~0; 2118 pipe.fs.flow_mask.dst_port = ~0; 2119 pipe.fs.flow_mask.src_port = ~0; 2120 pipe.fs.flow_mask.proto = ~0; 2121 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2122 goto end_mask; 2123 2124 case TOK_DSTIP: 2125 p32 = &pipe.fs.flow_mask.dst_ip; 2126 break; 2127 2128 case TOK_SRCIP: 2129 p32 = &pipe.fs.flow_mask.src_ip; 2130 break; 2131 2132 case TOK_DSTPORT: 2133 p16 = &pipe.fs.flow_mask.dst_port; 2134 break; 2135 2136 case TOK_SRCPORT: 2137 p16 = &pipe.fs.flow_mask.src_port; 2138 break; 2139 2140 case TOK_PROTO: 2141 break; 2142 2143 default: 2144 ac++; av--; /* backtrack */ 2145 goto end_mask; 2146 } 2147 if (ac < 1) 2148 errx(EX_USAGE, "mask: value missing"); 2149 if (*av[0] == '/') { 2150 a = strtoul(av[0]+1, &end, 0); 2151 a = (a == 32) ? ~0 : (1 << a) - 1; 2152 } else 2153 a = strtoul(av[0], &end, 0); 2154 if (p32 != NULL) 2155 *p32 = a; 2156 else if (p16 != NULL) { 2157 if (a > 65535) 2158 errx(EX_DATAERR, 2159 "mask: must be 16 bit"); 2160 *p16 = (u_int16_t)a; 2161 } else { 2162 if (a > 255) 2163 errx(EX_DATAERR, 2164 "mask: must be 8 bit"); 2165 pipe.fs.flow_mask.proto = (u_int8_t)a; 2166 } 2167 if (a != 0) 2168 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2169 ac--; av++; 2170 } /* end while, config masks */ 2171 end_mask: 2172 break; 2173 2174 case TOK_RED: 2175 case TOK_GRED: 2176 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2177 pipe.fs.flags_fs |= DN_IS_RED; 2178 if (tok == TOK_GRED) 2179 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2180 /* 2181 * the format for parameters is w_q/min_th/max_th/max_p 2182 */ 2183 if ((end = strsep(&av[0], "/"))) { 2184 double w_q = strtod(end, NULL); 2185 if (w_q > 1 || w_q <= 0) 2186 errx(EX_DATAERR, "0 < w_q <= 1"); 2187 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2188 } 2189 if ((end = strsep(&av[0], "/"))) { 2190 pipe.fs.min_th = strtoul(end, &end, 0); 2191 if (*end == 'K' || *end == 'k') 2192 pipe.fs.min_th *= 1024; 2193 } 2194 if ((end = strsep(&av[0], "/"))) { 2195 pipe.fs.max_th = strtoul(end, &end, 0); 2196 if (*end == 'K' || *end == 'k') 2197 pipe.fs.max_th *= 1024; 2198 } 2199 if ((end = strsep(&av[0], "/"))) { 2200 double max_p = strtod(end, NULL); 2201 if (max_p > 1 || max_p <= 0) 2202 errx(EX_DATAERR, "0 < max_p <= 1"); 2203 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2204 } 2205 ac--; av++; 2206 break; 2207 2208 case TOK_DROPTAIL: 2209 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2210 break; 2211 2212 case TOK_BW: 2213 NEED1("bw needs bandwidth or interface\n"); 2214 if (do_pipe != 1) 2215 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2216 /* 2217 * set clocking interface or bandwidth value 2218 */ 2219 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 2220 int l = sizeof(pipe.if_name)-1; 2221 /* interface name */ 2222 strncpy(pipe.if_name, av[0], l); 2223 pipe.if_name[l] = '\0'; 2224 pipe.bandwidth = 0; 2225 } else { 2226 pipe.if_name[0] = '\0'; 2227 pipe.bandwidth = strtoul(av[0], &end, 0); 2228 pipe.bandwidth = getbw(av[0], NULL, 1000); 2229 if (pipe.bandwidth < 0) 2230 errx(EX_DATAERR, "bandwidth too large"); 2231 } 2232 ac--; av++; 2233 break; 2234 2235 case TOK_DELAY: 2236 if (do_pipe != 1) 2237 errx(EX_DATAERR, "delay only valid for pipes"); 2238 NEED1("delay needs argument 0..10000ms\n"); 2239 pipe.delay = strtoul(av[0], NULL, 0); 2240 ac--; av++; 2241 break; 2242 2243 case TOK_WEIGHT: 2244 if (do_pipe == 1) 2245 errx(EX_DATAERR,"weight only valid for queues"); 2246 NEED1("weight needs argument 0..100\n"); 2247 pipe.fs.weight = strtoul(av[0], &end, 0); 2248 ac--; av++; 2249 break; 2250 2251 case TOK_PIPE: 2252 if (do_pipe == 1) 2253 errx(EX_DATAERR,"pipe only valid for queues"); 2254 NEED1("pipe needs pipe_number\n"); 2255 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2256 ac--; av++; 2257 break; 2258 2259 default: 2260 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2261 } 2262 } 2263 if (do_pipe == 1) { 2264 if (pipe.pipe_nr == 0) 2265 errx(EX_DATAERR, "pipe_nr must be > 0"); 2266 if (pipe.delay > 10000) 2267 errx(EX_DATAERR, "delay must be < 10000"); 2268 } else { /* do_pipe == 2, queue */ 2269 if (pipe.fs.parent_nr == 0) 2270 errx(EX_DATAERR, "pipe must be > 0"); 2271 if (pipe.fs.weight >100) 2272 errx(EX_DATAERR, "weight must be <= 100"); 2273 } 2274 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2275 if (pipe.fs.qsize > 1024*1024) 2276 errx(EX_DATAERR, "queue size must be < 1MB"); 2277 } else { 2278 if (pipe.fs.qsize > 100) 2279 errx(EX_DATAERR, "2 <= queue size <= 100"); 2280 } 2281 if (pipe.fs.flags_fs & DN_IS_RED) { 2282 size_t len; 2283 int lookup_depth, avg_pkt_size; 2284 double s, idle, weight, w_q; 2285 struct clockinfo clock; 2286 int t; 2287 2288 if (pipe.fs.min_th >= pipe.fs.max_th) 2289 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2290 pipe.fs.min_th, pipe.fs.max_th); 2291 if (pipe.fs.max_th == 0) 2292 errx(EX_DATAERR, "max_th must be > 0"); 2293 2294 len = sizeof(int); 2295 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2296 &lookup_depth, &len, NULL, 0) == -1) 2297 2298 errx(1, "sysctlbyname(\"%s\")", 2299 "net.inet.ip.dummynet.red_lookup_depth"); 2300 if (lookup_depth == 0) 2301 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2302 " must be greater than zero"); 2303 2304 len = sizeof(int); 2305 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2306 &avg_pkt_size, &len, NULL, 0) == -1) 2307 2308 errx(1, "sysctlbyname(\"%s\")", 2309 "net.inet.ip.dummynet.red_avg_pkt_size"); 2310 if (avg_pkt_size == 0) 2311 errx(EX_DATAERR, 2312 "net.inet.ip.dummynet.red_avg_pkt_size must" 2313 " be greater than zero"); 2314 2315 len = sizeof(struct clockinfo); 2316 if (sysctlbyname("kern.clockrate", &clock, &len, NULL, 0) == -1) 2317 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 2318 2319 /* 2320 * Ticks needed for sending a medium-sized packet. 2321 * Unfortunately, when we are configuring a WF2Q+ queue, we 2322 * do not have bandwidth information, because that is stored 2323 * in the parent pipe, and also we have multiple queues 2324 * competing for it. So we set s=0, which is not very 2325 * correct. But on the other hand, why do we want RED with 2326 * WF2Q+ ? 2327 */ 2328 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2329 s = 0; 2330 else 2331 s = clock.hz * avg_pkt_size * 8 / pipe.bandwidth; 2332 2333 /* 2334 * max idle time (in ticks) before avg queue size becomes 0. 2335 * NOTA: (3/w_q) is approx the value x so that 2336 * (1-w_q)^x < 10^-3. 2337 */ 2338 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2339 idle = s * 3. / w_q; 2340 pipe.fs.lookup_step = (int)idle / lookup_depth; 2341 if (!pipe.fs.lookup_step) 2342 pipe.fs.lookup_step = 1; 2343 weight = 1 - w_q; 2344 for (t = pipe.fs.lookup_step; t > 0; --t) 2345 weight *= weight; 2346 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2347 } 2348 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2349 sizeof pipe); 2350 if (i) 2351 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2352 } 2353 2354 static void 2355 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2356 { 2357 int i, l; 2358 2359 for (i=0; i<6; i++) 2360 addr[i] = mask[i] = 0; 2361 if (!strcmp(p, "any")) 2362 return; 2363 2364 for (i=0; *p && i<6;i++, p++) { 2365 addr[i] = strtol(p, &p, 16); 2366 if (*p != ':') /* we start with the mask */ 2367 break; 2368 } 2369 if (*p == '/') { /* mask len */ 2370 l = strtol(p+1, &p, 0); 2371 for (i=0; l>0; l -=8, i++) 2372 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2373 } else if (*p == '&') { /* mask */ 2374 for (i=0, p++; *p && i<6;i++, p++) { 2375 mask[i] = strtol(p, &p, 16); 2376 if (*p != ':') 2377 break; 2378 } 2379 } else if (*p == '\0') { 2380 for (i=0; i<6; i++) 2381 mask[i] = 0xff; 2382 } 2383 for (i=0; i<6; i++) 2384 addr[i] &= mask[i]; 2385 } 2386 2387 /* 2388 * helper function, updates the pointer to cmd with the length 2389 * of the current command, and also cleans up the first word of 2390 * the new command in case it has been clobbered before. 2391 */ 2392 static ipfw_insn * 2393 next_cmd(ipfw_insn *cmd) 2394 { 2395 cmd += F_LEN(cmd); 2396 bzero(cmd, sizeof(*cmd)); 2397 return cmd; 2398 } 2399 2400 /* 2401 * A function to fill simple commands of size 1. 2402 * Existing flags are preserved. 2403 */ 2404 static void 2405 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2406 { 2407 cmd->opcode = opcode; 2408 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2409 cmd->arg1 = arg; 2410 } 2411 2412 /* 2413 * Fetch and add the MAC address and type, with masks. This generates one or 2414 * two microinstructions, and returns the pointer to the last one. 2415 */ 2416 static ipfw_insn * 2417 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2418 { 2419 ipfw_insn_mac *mac; 2420 2421 if (ac < 2) 2422 errx(EX_DATAERR, "MAC dst src"); 2423 2424 cmd->opcode = O_MACADDR2; 2425 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2426 2427 mac = (ipfw_insn_mac *)cmd; 2428 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2429 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2430 return cmd; 2431 } 2432 2433 static ipfw_insn * 2434 add_mactype(ipfw_insn *cmd, int ac, char *av) 2435 { 2436 if (ac < 1) 2437 errx(EX_DATAERR, "missing MAC type"); 2438 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2439 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2440 cmd->opcode = O_MAC_TYPE; 2441 return cmd; 2442 } else 2443 return NULL; 2444 } 2445 2446 static ipfw_insn * 2447 add_proto(ipfw_insn *cmd, char *av) 2448 { 2449 struct protoent *pe; 2450 u_char proto = 0; 2451 2452 if (!strncmp(av, "all", strlen(av))) 2453 ; /* same as "ip" */ 2454 else if ((proto = atoi(av)) > 0) 2455 ; /* all done! */ 2456 else if ((pe = getprotobyname(av)) != NULL) 2457 proto = pe->p_proto; 2458 else 2459 return NULL; 2460 if (proto != IPPROTO_IP) 2461 fill_cmd(cmd, O_PROTO, 0, proto); 2462 return cmd; 2463 } 2464 2465 static ipfw_insn * 2466 add_srcip(ipfw_insn *cmd, char *av) 2467 { 2468 fill_ip((ipfw_insn_ip *)cmd, av); 2469 if (cmd->opcode == O_IP_DST_SET) /* set */ 2470 cmd->opcode = O_IP_SRC_SET; 2471 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2472 cmd->opcode = O_IP_SRC_ME; 2473 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2474 cmd->opcode = O_IP_SRC; 2475 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2476 cmd->opcode = O_IP_SRC_MASK; 2477 return cmd; 2478 } 2479 2480 static ipfw_insn * 2481 add_dstip(ipfw_insn *cmd, char *av) 2482 { 2483 fill_ip((ipfw_insn_ip *)cmd, av); 2484 if (cmd->opcode == O_IP_DST_SET) /* set */ 2485 ; 2486 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2487 cmd->opcode = O_IP_DST_ME; 2488 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2489 cmd->opcode = O_IP_DST; 2490 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2491 cmd->opcode = O_IP_DST_MASK; 2492 return cmd; 2493 } 2494 2495 static ipfw_insn * 2496 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2497 { 2498 if (!strncmp(av, "any", strlen(av))) { 2499 return NULL; 2500 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2501 /* XXX todo: check that we have a protocol with ports */ 2502 cmd->opcode = opcode; 2503 return cmd; 2504 } 2505 return NULL; 2506 } 2507 2508 /* 2509 * Parse arguments and assemble the microinstructions which make up a rule. 2510 * Rules are added into the 'rulebuf' and then copied in the correct order 2511 * into the actual rule. 2512 * 2513 * The syntax for a rule starts with the action, followed by an 2514 * optional log action, and the various match patterns. 2515 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2516 * (generated if the rule includes a keep-state option), then the 2517 * various match patterns, the "log" action, and the actual action. 2518 * 2519 */ 2520 static void 2521 add(int ac, char *av[]) 2522 { 2523 /* 2524 * rules are added into the 'rulebuf' and then copied in 2525 * the correct order into the actual rule. 2526 * Some things that need to go out of order (prob, action etc.) 2527 * go into actbuf[]. 2528 */ 2529 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2530 2531 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2532 ipfw_insn *first_cmd; /* first match pattern */ 2533 2534 struct ip_fw *rule; 2535 2536 /* 2537 * various flags used to record that we entered some fields. 2538 */ 2539 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2540 2541 int i; 2542 2543 int open_par = 0; /* open parenthesis ( */ 2544 2545 /* proto is here because it is used to fetch ports */ 2546 u_char proto = IPPROTO_IP; /* default protocol */ 2547 2548 double match_prob = 1; /* match probability, default is always match */ 2549 2550 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2551 bzero(cmdbuf, sizeof(cmdbuf)); 2552 bzero(rulebuf, sizeof(rulebuf)); 2553 2554 rule = (struct ip_fw *)rulebuf; 2555 cmd = (ipfw_insn *)cmdbuf; 2556 action = (ipfw_insn *)actbuf; 2557 2558 av++; ac--; 2559 2560 /* [rule N] -- Rule number optional */ 2561 if (ac && isdigit(**av)) { 2562 rule->rulenum = atoi(*av); 2563 av++; 2564 ac--; 2565 } 2566 2567 /* [set N] -- set number (0..30), optional */ 2568 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2569 int set = strtoul(av[1], NULL, 10); 2570 if (set < 0 || set > 30) 2571 errx(EX_DATAERR, "illegal set %s", av[1]); 2572 rule->set = set; 2573 av += 2; ac -= 2; 2574 } 2575 2576 /* [prob D] -- match probability, optional */ 2577 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2578 match_prob = strtod(av[1], NULL); 2579 2580 if (match_prob <= 0 || match_prob > 1) 2581 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2582 av += 2; ac -= 2; 2583 } 2584 2585 /* action -- mandatory */ 2586 NEED1("missing action"); 2587 i = match_token(rule_actions, *av); 2588 ac--; av++; 2589 action->len = 1; /* default */ 2590 switch(i) { 2591 case TOK_CHECKSTATE: 2592 have_state = action; 2593 action->opcode = O_CHECK_STATE; 2594 break; 2595 2596 case TOK_ACCEPT: 2597 action->opcode = O_ACCEPT; 2598 break; 2599 2600 case TOK_DENY: 2601 action->opcode = O_DENY; 2602 action->arg1 = 0; 2603 break; 2604 2605 case TOK_REJECT: 2606 action->opcode = O_REJECT; 2607 action->arg1 = ICMP_UNREACH_HOST; 2608 break; 2609 2610 case TOK_RESET: 2611 action->opcode = O_REJECT; 2612 action->arg1 = ICMP_REJECT_RST; 2613 break; 2614 2615 case TOK_UNREACH: 2616 action->opcode = O_REJECT; 2617 NEED1("missing reject code"); 2618 fill_reject_code(&action->arg1, *av); 2619 ac--; av++; 2620 break; 2621 2622 case TOK_COUNT: 2623 action->opcode = O_COUNT; 2624 break; 2625 2626 case TOK_QUEUE: 2627 case TOK_PIPE: 2628 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2629 case TOK_SKIPTO: 2630 if (i == TOK_QUEUE) 2631 action->opcode = O_QUEUE; 2632 else if (i == TOK_PIPE) 2633 action->opcode = O_PIPE; 2634 else if (i == TOK_SKIPTO) 2635 action->opcode = O_SKIPTO; 2636 NEED1("missing skipto/pipe/queue number"); 2637 action->arg1 = strtoul(*av, NULL, 10); 2638 av++; ac--; 2639 break; 2640 2641 case TOK_DIVERT: 2642 case TOK_TEE: 2643 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2644 NEED1("missing divert/tee port"); 2645 action->arg1 = strtoul(*av, NULL, 0); 2646 if (action->arg1 == 0) { 2647 struct servent *s; 2648 setservent(1); 2649 s = getservbyname(av[0], "divert"); 2650 if (s != NULL) 2651 action->arg1 = ntohs(s->s_port); 2652 else 2653 errx(EX_DATAERR, "illegal divert/tee port"); 2654 } 2655 ac--; av++; 2656 break; 2657 2658 case TOK_FORWARD: { 2659 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2660 char *s, *end; 2661 2662 NEED1("missing forward address[:port]"); 2663 2664 action->opcode = O_FORWARD_IP; 2665 action->len = F_INSN_SIZE(ipfw_insn_sa); 2666 2667 p->sa.sin_len = sizeof(struct sockaddr_in); 2668 p->sa.sin_family = AF_INET; 2669 p->sa.sin_port = 0; 2670 /* 2671 * locate the address-port separator (':' or ',') 2672 */ 2673 s = strchr(*av, ':'); 2674 if (s == NULL) 2675 s = strchr(*av, ','); 2676 if (s != NULL) { 2677 *(s++) = '\0'; 2678 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2679 if (s == end) 2680 errx(EX_DATAERR, 2681 "illegal forwarding port ``%s''", s); 2682 p->sa.sin_port = (u_short)i; 2683 } 2684 lookup_host(*av, &(p->sa.sin_addr)); 2685 } 2686 ac--; av++; 2687 break; 2688 2689 default: 2690 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2691 } 2692 action = next_cmd(action); 2693 2694 /* 2695 * [log [logamount N]] -- log, optional 2696 * 2697 * If exists, it goes first in the cmdbuf, but then it is 2698 * skipped in the copy section to the end of the buffer. 2699 */ 2700 if (ac && !strncmp(*av, "log", strlen(*av))) { 2701 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2702 2703 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2704 cmd->opcode = O_LOG; 2705 av++; ac--; 2706 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2707 ac--; av++; 2708 NEED1("logamount requires argument"); 2709 c->max_log = atoi(*av); 2710 if (c->max_log < 0) 2711 errx(EX_DATAERR, "logamount must be positive"); 2712 ac--; av++; 2713 } 2714 cmd = next_cmd(cmd); 2715 } 2716 2717 if (have_state) /* must be a check-state, we are done */ 2718 goto done; 2719 2720 #define OR_START(target) \ 2721 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2722 if (open_par) \ 2723 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2724 prev = NULL; \ 2725 open_par = 1; \ 2726 if ( (av[0])[1] == '\0') { \ 2727 ac--; av++; \ 2728 } else \ 2729 (*av)++; \ 2730 } \ 2731 target: \ 2732 2733 2734 #define CLOSE_PAR \ 2735 if (open_par) { \ 2736 if (ac && ( \ 2737 !strncmp(*av, ")", strlen(*av)) || \ 2738 !strncmp(*av, "}", strlen(*av)) )) { \ 2739 prev = NULL; \ 2740 open_par = 0; \ 2741 ac--; av++; \ 2742 } else \ 2743 errx(EX_USAGE, "missing \")\"\n"); \ 2744 } 2745 2746 #define NOT_BLOCK \ 2747 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2748 if (cmd->len & F_NOT) \ 2749 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2750 cmd->len |= F_NOT; \ 2751 ac--; av++; \ 2752 } 2753 2754 #define OR_BLOCK(target) \ 2755 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2756 if (prev == NULL || open_par == 0) \ 2757 errx(EX_DATAERR, "invalid OR block"); \ 2758 prev->len |= F_OR; \ 2759 ac--; av++; \ 2760 goto target; \ 2761 } \ 2762 CLOSE_PAR; 2763 2764 first_cmd = cmd; 2765 2766 #if 0 2767 /* 2768 * MAC addresses, optional. 2769 * If we have this, we skip the part "proto from src to dst" 2770 * and jump straight to the option parsing. 2771 */ 2772 NOT_BLOCK; 2773 NEED1("missing protocol"); 2774 if (!strncmp(*av, "MAC", strlen(*av)) || 2775 !strncmp(*av, "mac", strlen(*av))) { 2776 ac--; av++; /* the "MAC" keyword */ 2777 add_mac(cmd, ac, av); /* exits in case of errors */ 2778 cmd = next_cmd(cmd); 2779 ac -= 2; av += 2; /* dst-mac and src-mac */ 2780 NOT_BLOCK; 2781 NEED1("missing mac type"); 2782 if (add_mactype(cmd, ac, av[0])) 2783 cmd = next_cmd(cmd); 2784 ac--; av++; /* any or mac-type */ 2785 goto read_options; 2786 } 2787 #endif 2788 2789 /* 2790 * protocol, mandatory 2791 */ 2792 OR_START(get_proto); 2793 NOT_BLOCK; 2794 NEED1("missing protocol"); 2795 if (add_proto(cmd, *av)) { 2796 av++; ac--; 2797 if (F_LEN(cmd) == 0) /* plain IP */ 2798 proto = 0; 2799 else { 2800 proto = cmd->arg1; 2801 prev = cmd; 2802 cmd = next_cmd(cmd); 2803 } 2804 } else if (first_cmd != cmd) { 2805 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2806 } else 2807 goto read_options; 2808 OR_BLOCK(get_proto); 2809 2810 /* 2811 * "from", mandatory 2812 */ 2813 if (!ac || strncmp(*av, "from", strlen(*av))) 2814 errx(EX_USAGE, "missing ``from''"); 2815 ac--; av++; 2816 2817 /* 2818 * source IP, mandatory 2819 */ 2820 OR_START(source_ip); 2821 NOT_BLOCK; /* optional "not" */ 2822 NEED1("missing source address"); 2823 if (add_srcip(cmd, *av)) { 2824 ac--; av++; 2825 if (F_LEN(cmd) != 0) { /* ! any */ 2826 prev = cmd; 2827 cmd = next_cmd(cmd); 2828 } 2829 } 2830 OR_BLOCK(source_ip); 2831 2832 /* 2833 * source ports, optional 2834 */ 2835 NOT_BLOCK; /* optional "not" */ 2836 if (ac) { 2837 if (!strncmp(*av, "any", strlen(*av)) || 2838 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2839 ac--; av++; 2840 if (F_LEN(cmd) != 0) 2841 cmd = next_cmd(cmd); 2842 } 2843 } 2844 2845 /* 2846 * "to", mandatory 2847 */ 2848 if (!ac || strncmp(*av, "to", strlen(*av))) 2849 errx(EX_USAGE, "missing ``to''"); 2850 av++; ac--; 2851 2852 /* 2853 * destination, mandatory 2854 */ 2855 OR_START(dest_ip); 2856 NOT_BLOCK; /* optional "not" */ 2857 NEED1("missing dst address"); 2858 if (add_dstip(cmd, *av)) { 2859 ac--; av++; 2860 if (F_LEN(cmd) != 0) { /* ! any */ 2861 prev = cmd; 2862 cmd = next_cmd(cmd); 2863 } 2864 } 2865 OR_BLOCK(dest_ip); 2866 2867 /* 2868 * dest. ports, optional 2869 */ 2870 NOT_BLOCK; /* optional "not" */ 2871 if (ac) { 2872 if (!strncmp(*av, "any", strlen(*av)) || 2873 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2874 ac--; av++; 2875 if (F_LEN(cmd) != 0) 2876 cmd = next_cmd(cmd); 2877 } 2878 } 2879 2880 read_options: 2881 if (ac && first_cmd == cmd) { 2882 /* 2883 * nothing specified so far, store in the rule to ease 2884 * printout later. 2885 */ 2886 rule->_pad = 1; 2887 } 2888 prev = NULL; 2889 while (ac) { 2890 char *s; 2891 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2892 2893 s = *av; 2894 cmd32 = (ipfw_insn_u32 *)cmd; 2895 2896 if (*s == '!') { /* alternate syntax for NOT */ 2897 if (cmd->len & F_NOT) 2898 errx(EX_USAGE, "double \"not\" not allowed\n"); 2899 cmd->len = F_NOT; 2900 s++; 2901 } 2902 i = match_token(rule_options, s); 2903 ac--; av++; 2904 switch(i) { 2905 case TOK_NOT: 2906 if (cmd->len & F_NOT) 2907 errx(EX_USAGE, "double \"not\" not allowed\n"); 2908 cmd->len = F_NOT; 2909 break; 2910 2911 case TOK_OR: 2912 if (open_par == 0 || prev == NULL) 2913 errx(EX_USAGE, "invalid \"or\" block\n"); 2914 prev->len |= F_OR; 2915 break; 2916 2917 case TOK_STARTBRACE: 2918 if (open_par) 2919 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2920 open_par = 1; 2921 break; 2922 2923 case TOK_ENDBRACE: 2924 if (!open_par) 2925 errx(EX_USAGE, "+missing \")\"\n"); 2926 open_par = 0; 2927 prev = NULL; 2928 break; 2929 2930 case TOK_IN: 2931 fill_cmd(cmd, O_IN, 0, 0); 2932 break; 2933 2934 case TOK_OUT: 2935 cmd->len ^= F_NOT; /* toggle F_NOT */ 2936 fill_cmd(cmd, O_IN, 0, 0); 2937 break; 2938 2939 case TOK_FRAG: 2940 fill_cmd(cmd, O_FRAG, 0, 0); 2941 break; 2942 2943 case TOK_LAYER2: 2944 fill_cmd(cmd, O_LAYER2, 0, 0); 2945 break; 2946 2947 case TOK_XMIT: 2948 case TOK_RECV: 2949 case TOK_VIA: 2950 NEED1("recv, xmit, via require interface name" 2951 " or address"); 2952 fill_iface((ipfw_insn_if *)cmd, av[0]); 2953 ac--; av++; 2954 if (F_LEN(cmd) == 0) /* not a valid address */ 2955 break; 2956 if (i == TOK_XMIT) 2957 cmd->opcode = O_XMIT; 2958 else if (i == TOK_RECV) 2959 cmd->opcode = O_RECV; 2960 else if (i == TOK_VIA) 2961 cmd->opcode = O_VIA; 2962 break; 2963 2964 case TOK_ICMPTYPES: 2965 NEED1("icmptypes requires list of types"); 2966 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 2967 av++; ac--; 2968 break; 2969 2970 case TOK_IPTTL: 2971 NEED1("ipttl requires TTL"); 2972 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 2973 ac--; av++; 2974 break; 2975 2976 case TOK_IPID: 2977 NEED1("ipid requires length"); 2978 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 2979 ac--; av++; 2980 break; 2981 2982 case TOK_IPLEN: 2983 NEED1("iplen requires length"); 2984 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 2985 ac--; av++; 2986 break; 2987 2988 case TOK_IPVER: 2989 NEED1("ipver requires version"); 2990 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 2991 ac--; av++; 2992 break; 2993 2994 case TOK_IPPRECEDENCE: 2995 NEED1("ipprecedence requires value"); 2996 fill_cmd(cmd, O_IPPRECEDENCE, 0, 2997 (strtoul(*av, NULL, 0) & 7) << 5); 2998 ac--; av++; 2999 break; 3000 3001 case TOK_IPOPTS: 3002 NEED1("missing argument for ipoptions"); 3003 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3004 ac--; av++; 3005 break; 3006 3007 case TOK_IPTOS: 3008 NEED1("missing argument for iptos"); 3009 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3010 ac--; av++; 3011 break; 3012 3013 case TOK_UID: 3014 NEED1("uid requires argument"); 3015 { 3016 char *end; 3017 uid_t uid; 3018 struct passwd *pwd; 3019 3020 cmd->opcode = O_UID; 3021 uid = strtoul(*av, &end, 0); 3022 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3023 if (pwd == NULL) 3024 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3025 cmd32->d[0] = pwd->pw_uid; 3026 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3027 ac--; av++; 3028 } 3029 break; 3030 3031 case TOK_GID: 3032 NEED1("gid requires argument"); 3033 { 3034 char *end; 3035 gid_t gid; 3036 struct group *grp; 3037 3038 cmd->opcode = O_GID; 3039 gid = strtoul(*av, &end, 0); 3040 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3041 if (grp == NULL) 3042 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3043 cmd32->d[0] = grp->gr_gid; 3044 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3045 ac--; av++; 3046 } 3047 break; 3048 3049 case TOK_ESTAB: 3050 fill_cmd(cmd, O_ESTAB, 0, 0); 3051 break; 3052 3053 case TOK_SETUP: 3054 fill_cmd(cmd, O_TCPFLAGS, 0, 3055 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3056 break; 3057 3058 case TOK_TCPOPTS: 3059 NEED1("missing argument for tcpoptions"); 3060 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3061 ac--; av++; 3062 break; 3063 3064 case TOK_TCPSEQ: 3065 case TOK_TCPACK: 3066 NEED1("tcpseq/tcpack requires argument"); 3067 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3068 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3069 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3070 ac--; av++; 3071 break; 3072 3073 case TOK_TCPWIN: 3074 NEED1("tcpwin requires length"); 3075 fill_cmd(cmd, O_TCPWIN, 0, 3076 htons(strtoul(*av, NULL, 0))); 3077 ac--; av++; 3078 break; 3079 3080 case TOK_TCPFLAGS: 3081 NEED1("missing argument for tcpflags"); 3082 cmd->opcode = O_TCPFLAGS; 3083 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3084 ac--; av++; 3085 break; 3086 3087 case TOK_KEEPSTATE: 3088 if (open_par) 3089 errx(EX_USAGE, "keep-state cannot be part " 3090 "of an or block"); 3091 if (have_state) 3092 errx(EX_USAGE, "only one of keep-state " 3093 "and limit is allowed"); 3094 have_state = cmd; 3095 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3096 break; 3097 3098 case TOK_LIMIT: 3099 if (open_par) 3100 errx(EX_USAGE, "limit cannot be part " 3101 "of an or block"); 3102 if (have_state) 3103 errx(EX_USAGE, "only one of keep-state " 3104 "and limit is allowed"); 3105 NEED1("limit needs mask and # of connections"); 3106 have_state = cmd; 3107 { 3108 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3109 3110 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3111 cmd->opcode = O_LIMIT; 3112 c->limit_mask = 0; 3113 c->conn_limit = 0; 3114 for (; ac >1 ;) { 3115 int val; 3116 3117 val = match_token(limit_masks, *av); 3118 if (val <= 0) 3119 break; 3120 c->limit_mask |= val; 3121 ac--; av++; 3122 } 3123 c->conn_limit = atoi(*av); 3124 if (c->conn_limit == 0) 3125 errx(EX_USAGE, "limit: limit must be >0"); 3126 if (c->limit_mask == 0) 3127 errx(EX_USAGE, "missing limit mask"); 3128 ac--; av++; 3129 } 3130 break; 3131 3132 case TOK_PROTO: 3133 NEED1("missing protocol"); 3134 if (add_proto(cmd, *av)) { 3135 proto = cmd->arg1; 3136 ac--; av++; 3137 } else 3138 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3139 break; 3140 3141 case TOK_SRCIP: 3142 NEED1("missing source IP"); 3143 if (add_srcip(cmd, *av)) { 3144 ac--; av++; 3145 } 3146 break; 3147 3148 case TOK_DSTIP: 3149 NEED1("missing destination IP"); 3150 if (add_dstip(cmd, *av)) { 3151 ac--; av++; 3152 } 3153 break; 3154 3155 case TOK_SRCPORT: 3156 NEED1("missing source port"); 3157 if (!strncmp(*av, "any", strlen(*av)) || 3158 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3159 ac--; av++; 3160 } else 3161 errx(EX_DATAERR, "invalid source port %s", *av); 3162 break; 3163 3164 case TOK_DSTPORT: 3165 NEED1("missing destination port"); 3166 if (!strncmp(*av, "any", strlen(*av)) || 3167 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3168 ac--; av++; 3169 } else 3170 errx(EX_DATAERR, "invalid destination port %s", 3171 *av); 3172 break; 3173 3174 case TOK_MAC: 3175 if (ac < 2) 3176 errx(EX_USAGE, "MAC dst-mac src-mac"); 3177 if (add_mac(cmd, ac, av)) { 3178 ac -= 2; av += 2; 3179 } 3180 break; 3181 3182 case TOK_MACTYPE: 3183 NEED1("missing mac type"); 3184 if (!add_mactype(cmd, ac, *av)) 3185 errx(EX_DATAERR, "invalid mac type %s", *av); 3186 ac--; av++; 3187 break; 3188 3189 default: 3190 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3191 } 3192 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3193 prev = cmd; 3194 cmd = next_cmd(cmd); 3195 } 3196 } 3197 3198 done: 3199 /* 3200 * Now copy stuff into the rule. 3201 * If we have a keep-state option, the first instruction 3202 * must be a PROBE_STATE (which is generated here). 3203 * If we have a LOG option, it was stored as the first command, 3204 * and now must be moved to the top of the action part. 3205 */ 3206 dst = (ipfw_insn *)rule->cmd; 3207 3208 /* 3209 * First thing to write into the command stream is the match probability. 3210 */ 3211 if (match_prob != 1) { /* 1 means always match */ 3212 dst->opcode = O_PROB; 3213 dst->len = 2; 3214 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3215 dst += dst->len; 3216 } 3217 3218 /* 3219 * generate O_PROBE_STATE if necessary 3220 */ 3221 if (have_state && have_state->opcode != O_CHECK_STATE) { 3222 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3223 dst = next_cmd(dst); 3224 } 3225 /* 3226 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3227 */ 3228 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3229 i = F_LEN(src); 3230 3231 switch (src->opcode) { 3232 case O_LOG: 3233 case O_KEEP_STATE: 3234 case O_LIMIT: 3235 break; 3236 default: 3237 bcopy(src, dst, i * sizeof(u_int32_t)); 3238 dst += i; 3239 } 3240 } 3241 3242 /* 3243 * put back the have_state command as last opcode 3244 */ 3245 if (have_state && have_state->opcode != O_CHECK_STATE) { 3246 i = F_LEN(have_state); 3247 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3248 dst += i; 3249 } 3250 /* 3251 * start action section 3252 */ 3253 rule->act_ofs = dst - rule->cmd; 3254 3255 /* 3256 * put back O_LOG if necessary 3257 */ 3258 src = (ipfw_insn *)cmdbuf; 3259 if ( src->opcode == O_LOG ) { 3260 i = F_LEN(src); 3261 bcopy(src, dst, i * sizeof(u_int32_t)); 3262 dst += i; 3263 } 3264 /* 3265 * copy all other actions 3266 */ 3267 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3268 i = F_LEN(src); 3269 bcopy(src, dst, i * sizeof(u_int32_t)); 3270 dst += i; 3271 } 3272 3273 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3274 i = (void *)dst - (void *)rule; 3275 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3276 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3277 if (!do_quiet) 3278 show_ipfw(rule, 10, 10); 3279 } 3280 3281 static void 3282 zero(int ac, char *av[]) 3283 { 3284 int rulenum; 3285 int failed = EX_OK; 3286 3287 av++; ac--; 3288 3289 if (!ac) { 3290 /* clear all entries */ 3291 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3292 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3293 if (!do_quiet) 3294 printf("Accounting cleared.\n"); 3295 3296 return; 3297 } 3298 3299 while (ac) { 3300 /* Rule number */ 3301 if (isdigit(**av)) { 3302 rulenum = atoi(*av); 3303 av++; 3304 ac--; 3305 if (setsockopt(s, IPPROTO_IP, 3306 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3307 warn("rule %u: setsockopt(IP_FW_ZERO)", 3308 rulenum); 3309 failed = EX_UNAVAILABLE; 3310 } else if (!do_quiet) 3311 printf("Entry %d cleared\n", rulenum); 3312 } else { 3313 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3314 } 3315 } 3316 if (failed != EX_OK) 3317 exit(failed); 3318 } 3319 3320 static void 3321 resetlog(int ac, char *av[]) 3322 { 3323 int rulenum; 3324 int failed = EX_OK; 3325 3326 av++; ac--; 3327 3328 if (!ac) { 3329 /* clear all entries */ 3330 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3331 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3332 if (!do_quiet) 3333 printf("Logging counts reset.\n"); 3334 3335 return; 3336 } 3337 3338 while (ac) { 3339 /* Rule number */ 3340 if (isdigit(**av)) { 3341 rulenum = atoi(*av); 3342 av++; 3343 ac--; 3344 if (setsockopt(s, IPPROTO_IP, 3345 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3346 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3347 rulenum); 3348 failed = EX_UNAVAILABLE; 3349 } else if (!do_quiet) 3350 printf("Entry %d logging count reset\n", 3351 rulenum); 3352 } else { 3353 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3354 } 3355 } 3356 if (failed != EX_OK) 3357 exit(failed); 3358 } 3359 3360 static void 3361 flush() 3362 { 3363 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3364 3365 if (!do_force && !do_quiet) { /* need to ask user */ 3366 int c; 3367 3368 printf("Are you sure? [yn] "); 3369 fflush(stdout); 3370 do { 3371 c = toupper(getc(stdin)); 3372 while (c != '\n' && getc(stdin) != '\n') 3373 if (feof(stdin)) 3374 return; /* and do not flush */ 3375 } while (c != 'Y' && c != 'N'); 3376 printf("\n"); 3377 if (c == 'N') /* user said no */ 3378 return; 3379 } 3380 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3381 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3382 do_pipe ? "DUMMYNET" : "FW"); 3383 if (!do_quiet) 3384 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3385 } 3386 3387 static int 3388 ipfw_main(int ac, char **av) 3389 { 3390 int ch; 3391 3392 if (ac == 1) 3393 show_usage(); 3394 3395 /* Set the force flag for non-interactive processes */ 3396 do_force = !isatty(STDIN_FILENO); 3397 3398 optind = optreset = 1; 3399 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3400 switch (ch) { 3401 case 'h': /* help */ 3402 help(); 3403 break; /* NOTREACHED */ 3404 3405 case 's': /* sort */ 3406 do_sort = atoi(optarg); 3407 break; 3408 case 'a': 3409 do_acct = 1; 3410 break; 3411 case 'c': 3412 do_compact = 1; 3413 break; 3414 case 'd': 3415 do_dynamic = 1; 3416 break; 3417 case 'e': 3418 do_expired = 1; 3419 break; 3420 case 'f': 3421 do_force = 1; 3422 break; 3423 case 'N': 3424 do_resolv = 1; 3425 break; 3426 case 'q': 3427 do_quiet = 1; 3428 break; 3429 case 'S': 3430 show_sets = 1; 3431 break; 3432 case 't': 3433 do_time = 1; 3434 break; 3435 case 'v': /* verbose */ 3436 verbose++; 3437 break; 3438 default: 3439 show_usage(); 3440 } 3441 3442 ac -= optind; 3443 av += optind; 3444 NEED1("bad arguments, for usage summary ``ipfw''"); 3445 3446 /* 3447 * optional: pipe or queue 3448 */ 3449 if (!strncmp(*av, "pipe", strlen(*av))) { 3450 do_pipe = 1; 3451 ac--; 3452 av++; 3453 } else if (!strncmp(*av, "queue", strlen(*av))) { 3454 do_pipe = 2; 3455 ac--; 3456 av++; 3457 } 3458 NEED1("missing command"); 3459 3460 /* 3461 * for pipes and queues we normally say 'pipe NN config' 3462 * but the code is easier to parse as 'pipe config NN' 3463 * so we swap the two arguments. 3464 */ 3465 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3466 char *p = av[0]; 3467 av[0] = av[1]; 3468 av[1] = p; 3469 } 3470 if (!strncmp(*av, "add", strlen(*av))) 3471 add(ac, av); 3472 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3473 config_pipe(ac, av); 3474 else if (!strncmp(*av, "delete", strlen(*av))) 3475 delete(ac, av); 3476 else if (!strncmp(*av, "flush", strlen(*av))) 3477 flush(); 3478 else if (!strncmp(*av, "zero", strlen(*av))) 3479 zero(ac, av); 3480 else if (!strncmp(*av, "resetlog", strlen(*av))) 3481 resetlog(ac, av); 3482 else if (!strncmp(*av, "print", strlen(*av)) || 3483 !strncmp(*av, "list", strlen(*av))) 3484 list(ac, av); 3485 else if (!strncmp(*av, "enable", strlen(*av))) 3486 sysctl_handler(ac, av, 1); 3487 else if (!strncmp(*av, "disable", strlen(*av))) 3488 sysctl_handler(ac, av, 0); 3489 else if (!strncmp(*av, "set", strlen(*av))) 3490 sets_handler(ac, av); 3491 else if (!strncmp(*av, "show", strlen(*av))) { 3492 do_acct++; 3493 list(ac, av); 3494 } else 3495 errx(EX_USAGE, "bad command `%s'", *av); 3496 return 0; 3497 } 3498 3499 3500 static void 3501 ipfw_readfile(int ac, char *av[]) 3502 { 3503 #define MAX_ARGS 32 3504 #define WHITESP " \t\f\v\n\r" 3505 char buf[BUFSIZ]; 3506 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3507 char linename[10]; 3508 int i=0, lineno=0, qflag=0, pflag=0, status; 3509 FILE *f = NULL; 3510 pid_t preproc = 0; 3511 int c; 3512 3513 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 3514 switch(c) { 3515 case 'D': 3516 if (!pflag) 3517 errx(EX_USAGE, "-D requires -p"); 3518 if (i > MAX_ARGS - 2) 3519 errx(EX_USAGE, 3520 "too many -D or -U options"); 3521 args[i++] = "-D"; 3522 args[i++] = optarg; 3523 break; 3524 3525 case 'U': 3526 if (!pflag) 3527 errx(EX_USAGE, "-U requires -p"); 3528 if (i > MAX_ARGS - 2) 3529 errx(EX_USAGE, 3530 "too many -D or -U options"); 3531 args[i++] = "-U"; 3532 args[i++] = optarg; 3533 break; 3534 3535 case 'p': 3536 pflag = 1; 3537 cmd = optarg; 3538 args[0] = cmd; 3539 i = 1; 3540 break; 3541 3542 case 'q': 3543 qflag = 1; 3544 break; 3545 3546 default: 3547 errx(EX_USAGE, "bad arguments, for usage" 3548 " summary ``ipfw''"); 3549 } 3550 3551 av += optind; 3552 ac -= optind; 3553 if (ac != 1) 3554 errx(EX_USAGE, "extraneous filename arguments"); 3555 3556 if ((f = fopen(av[0], "r")) == NULL) 3557 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3558 3559 if (pflag) { 3560 /* pipe through preprocessor (cpp or m4) */ 3561 int pipedes[2]; 3562 3563 args[i] = 0; 3564 3565 if (pipe(pipedes) == -1) 3566 err(EX_OSERR, "cannot create pipe"); 3567 3568 switch((preproc = fork())) { 3569 case -1: 3570 err(EX_OSERR, "cannot fork"); 3571 3572 case 0: 3573 /* child */ 3574 if (dup2(fileno(f), 0) == -1 3575 || dup2(pipedes[1], 1) == -1) 3576 err(EX_OSERR, "dup2()"); 3577 fclose(f); 3578 close(pipedes[1]); 3579 close(pipedes[0]); 3580 execvp(cmd, args); 3581 err(EX_OSERR, "execvp(%s) failed", cmd); 3582 3583 default: 3584 /* parent */ 3585 fclose(f); 3586 close(pipedes[1]); 3587 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3588 int savederrno = errno; 3589 3590 kill(preproc, SIGTERM); 3591 errno = savederrno; 3592 err(EX_OSERR, "fdopen()"); 3593 } 3594 } 3595 } 3596 3597 while (fgets(buf, BUFSIZ, f)) { 3598 lineno++; 3599 sprintf(linename, "Line %d", lineno); 3600 args[0] = linename; 3601 3602 if (*buf == '#') 3603 continue; 3604 if ((p = strchr(buf, '#')) != NULL) 3605 *p = '\0'; 3606 i = 1; 3607 if (qflag) 3608 args[i++] = "-q"; 3609 for (a = strtok(buf, WHITESP); 3610 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3611 args[i] = a; 3612 if (i == (qflag? 2: 1)) 3613 continue; 3614 if (i == MAX_ARGS) 3615 errx(EX_USAGE, "%s: too many arguments", 3616 linename); 3617 args[i] = NULL; 3618 3619 ipfw_main(i, args); 3620 } 3621 fclose(f); 3622 if (pflag) { 3623 if (waitpid(preproc, &status, 0) == -1) 3624 errx(EX_OSERR, "waitpid()"); 3625 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3626 errx(EX_UNAVAILABLE, 3627 "preprocessor exited with status %d", 3628 WEXITSTATUS(status)); 3629 else if (WIFSIGNALED(status)) 3630 errx(EX_UNAVAILABLE, 3631 "preprocessor exited with signal %d", 3632 WTERMSIG(status)); 3633 } 3634 } 3635 3636 int 3637 main(int ac, char *av[]) 3638 { 3639 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3640 if (s < 0) 3641 err(EX_UNAVAILABLE, "socket"); 3642 3643 /* 3644 * If the last argument is an absolute pathname, interpret it 3645 * as a file to be preprocessed. 3646 */ 3647 3648 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3649 ipfw_readfile(ac, av); 3650 else 3651 ipfw_main(ac, av); 3652 return EX_OK; 3653 } 3654