1 /* 2 * Copyright (c) 2002 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $ 21 */ 22 23 #include <sys/param.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 #include <sys/time.h> 29 #include <sys/wait.h> 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <limits.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <stdarg.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <sysexits.h> 45 46 #include <net/if.h> 47 #include <netinet/in.h> 48 #include <netinet/in_systm.h> 49 #include <netinet/ip.h> 50 #include <netinet/ip_icmp.h> 51 #include <net/ipfw/ip_fw.h> 52 #include <net/route.h> /* def. of struct route */ 53 #include <net/ethernet.h> 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 { "pppoe_disc", 0x8863 }, 162 { "pppoe_sess", 0x8864 }, 163 { "ipx_8022", 0x00E0 }, 164 { "ipx_8023", 0x0000 }, 165 { "ipx_ii", 0x8137 }, 166 { "ipx_snap", 0x8137 }, 167 { "ipx", 0x8137 }, 168 { "ns", 0x0600 }, 169 { NULL, 0 } 170 }; 171 172 static void show_usage(void); 173 174 enum tokens { 175 TOK_NULL=0, 176 177 TOK_OR, 178 TOK_NOT, 179 TOK_STARTBRACE, 180 TOK_ENDBRACE, 181 182 TOK_ACCEPT, 183 TOK_COUNT, 184 TOK_PIPE, 185 TOK_QUEUE, 186 TOK_DIVERT, 187 TOK_TEE, 188 TOK_FORWARD, 189 TOK_SKIPTO, 190 TOK_DENY, 191 TOK_REJECT, 192 TOK_RESET, 193 TOK_UNREACH, 194 TOK_CHECKSTATE, 195 196 TOK_UID, 197 TOK_GID, 198 TOK_IN, 199 TOK_LIMIT, 200 TOK_KEEPSTATE, 201 TOK_LAYER2, 202 TOK_OUT, 203 TOK_XMIT, 204 TOK_RECV, 205 TOK_VIA, 206 TOK_FRAG, 207 TOK_IPOPTS, 208 TOK_IPLEN, 209 TOK_IPID, 210 TOK_IPPRECEDENCE, 211 TOK_IPTOS, 212 TOK_IPTTL, 213 TOK_IPVER, 214 TOK_ESTAB, 215 TOK_SETUP, 216 TOK_TCPFLAGS, 217 TOK_TCPOPTS, 218 TOK_TCPSEQ, 219 TOK_TCPACK, 220 TOK_TCPWIN, 221 TOK_ICMPTYPES, 222 TOK_MAC, 223 TOK_MACTYPE, 224 225 TOK_PLR, 226 TOK_NOERROR, 227 TOK_BUCKETS, 228 TOK_DSTIP, 229 TOK_SRCIP, 230 TOK_DSTPORT, 231 TOK_SRCPORT, 232 TOK_ALL, 233 TOK_MASK, 234 TOK_BW, 235 TOK_DELAY, 236 TOK_RED, 237 TOK_GRED, 238 TOK_DROPTAIL, 239 TOK_PROTO, 240 TOK_WEIGHT, 241 }; 242 243 struct _s_x dummynet_params[] = { 244 { "plr", TOK_PLR }, 245 { "noerror", TOK_NOERROR }, 246 { "buckets", TOK_BUCKETS }, 247 { "dst-ip", TOK_DSTIP }, 248 { "src-ip", TOK_SRCIP }, 249 { "dst-port", TOK_DSTPORT }, 250 { "src-port", TOK_SRCPORT }, 251 { "proto", TOK_PROTO }, 252 { "weight", TOK_WEIGHT }, 253 { "all", TOK_ALL }, 254 { "mask", TOK_MASK }, 255 { "droptail", TOK_DROPTAIL }, 256 { "red", TOK_RED }, 257 { "gred", TOK_GRED }, 258 { "bw", TOK_BW }, 259 { "bandwidth", TOK_BW }, 260 { "delay", TOK_DELAY }, 261 { "pipe", TOK_PIPE }, 262 { "queue", TOK_QUEUE }, 263 { "dummynet-params", TOK_NULL }, 264 { NULL, 0 } 265 }; 266 267 struct _s_x rule_actions[] = { 268 { "accept", TOK_ACCEPT }, 269 { "pass", TOK_ACCEPT }, 270 { "allow", TOK_ACCEPT }, 271 { "permit", TOK_ACCEPT }, 272 { "count", TOK_COUNT }, 273 { "pipe", TOK_PIPE }, 274 { "queue", TOK_QUEUE }, 275 { "divert", TOK_DIVERT }, 276 { "tee", TOK_TEE }, 277 { "fwd", TOK_FORWARD }, 278 { "forward", TOK_FORWARD }, 279 { "skipto", TOK_SKIPTO }, 280 { "deny", TOK_DENY }, 281 { "drop", TOK_DENY }, 282 { "reject", TOK_REJECT }, 283 { "reset", TOK_RESET }, 284 { "unreach", TOK_UNREACH }, 285 { "check-state", TOK_CHECKSTATE }, 286 { NULL, TOK_NULL }, 287 { NULL, 0 } 288 }; 289 290 struct _s_x rule_options[] = { 291 { "uid", TOK_UID }, 292 { "gid", TOK_GID }, 293 { "in", TOK_IN }, 294 { "limit", TOK_LIMIT }, 295 { "keep-state", TOK_KEEPSTATE }, 296 { "layer2", TOK_LAYER2 }, 297 { "out", TOK_OUT }, 298 { "xmit", TOK_XMIT }, 299 { "recv", TOK_RECV }, 300 { "via", TOK_VIA }, 301 { "fragment", TOK_FRAG }, 302 { "frag", TOK_FRAG }, 303 { "ipoptions", TOK_IPOPTS }, 304 { "ipopts", TOK_IPOPTS }, 305 { "iplen", TOK_IPLEN }, 306 { "ipid", TOK_IPID }, 307 { "ipprecedence", TOK_IPPRECEDENCE }, 308 { "iptos", TOK_IPTOS }, 309 { "ipttl", TOK_IPTTL }, 310 { "ipversion", TOK_IPVER }, 311 { "ipver", TOK_IPVER }, 312 { "estab", TOK_ESTAB }, 313 { "established", TOK_ESTAB }, 314 { "setup", TOK_SETUP }, 315 { "tcpflags", TOK_TCPFLAGS }, 316 { "tcpflgs", TOK_TCPFLAGS }, 317 { "tcpoptions", TOK_TCPOPTS }, 318 { "tcpopts", TOK_TCPOPTS }, 319 { "tcpseq", TOK_TCPSEQ }, 320 { "tcpack", TOK_TCPACK }, 321 { "tcpwin", TOK_TCPWIN }, 322 { "icmptype", TOK_ICMPTYPES }, 323 { "icmptypes", TOK_ICMPTYPES }, 324 { "dst-ip", TOK_DSTIP }, 325 { "src-ip", TOK_SRCIP }, 326 { "dst-port", TOK_DSTPORT }, 327 { "src-port", TOK_SRCPORT }, 328 { "proto", TOK_PROTO }, 329 { "MAC", TOK_MAC }, 330 { "mac", TOK_MAC }, 331 { "mac-type", TOK_MACTYPE }, 332 333 { "not", TOK_NOT }, /* pseudo option */ 334 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 335 { "or", TOK_OR }, /* pseudo option */ 336 { "|", /* escape */ TOK_OR }, /* pseudo option */ 337 { "{", TOK_STARTBRACE }, /* pseudo option */ 338 { "(", TOK_STARTBRACE }, /* pseudo option */ 339 { "}", TOK_ENDBRACE }, /* pseudo option */ 340 { ")", TOK_ENDBRACE }, /* pseudo option */ 341 { NULL, TOK_NULL }, 342 { NULL, 0 } 343 }; 344 345 /** 346 * match_token takes a table and a string, returns the value associated 347 * with the string (0 meaning an error in most cases) 348 */ 349 static int 350 match_token(struct _s_x *table, char *string) 351 { 352 struct _s_x *pt; 353 int i = strlen(string); 354 355 for (pt = table ; i && pt->s != NULL ; pt++) 356 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 357 return pt->x; 358 return -1; 359 }; 360 361 static char * 362 match_value(struct _s_x *p, u_int32_t value) 363 { 364 for (; p->s != NULL; p++) 365 if (p->x == value) 366 return p->s; 367 return NULL; 368 } 369 370 /* 371 * prints one port, symbolic or numeric 372 */ 373 static void 374 print_port(int proto, u_int16_t port) 375 { 376 377 if (proto == IPPROTO_ETHERTYPE) { 378 char *s; 379 380 if (do_resolv && (s = match_value(ether_types, port)) ) 381 printf("%s", s); 382 else 383 printf("0x%04x", port); 384 } else { 385 struct servent *se = NULL; 386 if (do_resolv) { 387 struct protoent *pe = getprotobynumber(proto); 388 389 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 390 } 391 if (se) 392 printf("%s", se->s_name); 393 else 394 printf("%d", port); 395 } 396 } 397 398 /* 399 * print the values in a list of ports 400 * XXX todo: add support for mask. 401 */ 402 static void 403 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 404 { 405 u_int16_t *p = cmd->ports; 406 int i; 407 char *sep= " "; 408 409 if (cmd->o.len & F_NOT) 410 printf(" not"); 411 if (opcode != 0) 412 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 413 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 414 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 415 printf(sep); 416 print_port(proto, p[0]); 417 if (p[0] != p[1]) { 418 printf("-"); 419 print_port(proto, p[1]); 420 } 421 sep = ","; 422 } 423 } 424 425 /* 426 * Like strtol, but also translates service names into port numbers 427 * for some protocols. 428 * In particular: 429 * proto == -1 disables the protocol check; 430 * proto == IPPROTO_ETHERTYPE looks up an internal table 431 * proto == <some value in /etc/protocols> matches the values there. 432 * Returns *end == s in case the parameter is not found. 433 */ 434 static int 435 strtoport(char *s, char **end, int base, int proto) 436 { 437 char *p, *buf; 438 char *s1; 439 int i; 440 441 *end = s; /* default - not found */ 442 if ( *s == '\0') 443 return 0; /* not found */ 444 445 if (isdigit(*s)) 446 return strtol(s, end, base); 447 448 /* 449 * find separator. '\\' escapes the next char. 450 */ 451 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 452 if (*s1 == '\\' && s1[1] != '\0') 453 s1++; 454 455 buf = malloc(s1 - s + 1); 456 if (buf == NULL) 457 return 0; 458 459 /* 460 * copy into a buffer skipping backslashes 461 */ 462 for (p = s, i = 0; p != s1 ; p++) 463 if ( *p != '\\') 464 buf[i++] = *p; 465 buf[i++] = '\0'; 466 467 if (proto == IPPROTO_ETHERTYPE) { 468 i = match_token(ether_types, buf); 469 free(buf); 470 if (i != -1) { /* found */ 471 *end = s1; 472 return i; 473 } 474 } else { 475 struct protoent *pe = NULL; 476 struct servent *se; 477 478 if (proto != 0) 479 pe = getprotobynumber(proto); 480 setservent(1); 481 se = getservbyname(buf, pe ? pe->p_name : NULL); 482 free(buf); 483 if (se != NULL) { 484 *end = s1; 485 return ntohs(se->s_port); 486 } 487 } 488 return 0; /* not found */ 489 } 490 491 /* 492 * fill the body of the command with the list of port ranges. 493 * At the moment it only understands numeric ranges. 494 */ 495 static int 496 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 497 { 498 u_int16_t *p = cmd->ports; 499 int i = 0; 500 char *s = av; 501 502 while (*s) { 503 u_int16_t a, b; 504 505 a = strtoport(av, &s, 0, proto); 506 if (s == av) /* no parameter */ 507 break; 508 if (*s == '-') { /* a range */ 509 av = s+1; 510 b = strtoport(av, &s, 0, proto); 511 if (s == av) /* no parameter */ 512 break; 513 p[0] = a; 514 p[1] = b; 515 } else if (*s == ',' || *s == '\0' ) { 516 p[0] = p[1] = a; 517 } else { /* invalid separator */ 518 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 519 *s, av); 520 } 521 i++; 522 p += 2; 523 av = s+1; 524 } 525 if (i > 0) { 526 if (i+1 > F_LEN_MASK) 527 errx(EX_DATAERR, "too many ports/ranges\n"); 528 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 529 } 530 return i; 531 } 532 533 static struct _s_x icmpcodes[] = { 534 { "net", ICMP_UNREACH_NET }, 535 { "host", ICMP_UNREACH_HOST }, 536 { "protocol", ICMP_UNREACH_PROTOCOL }, 537 { "port", ICMP_UNREACH_PORT }, 538 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 539 { "srcfail", ICMP_UNREACH_SRCFAIL }, 540 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 541 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 542 { "isolated", ICMP_UNREACH_ISOLATED }, 543 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 544 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 545 { "tosnet", ICMP_UNREACH_TOSNET }, 546 { "toshost", ICMP_UNREACH_TOSHOST }, 547 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 548 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 549 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 550 { NULL, 0 } 551 }; 552 553 static void 554 fill_reject_code(u_short *codep, char *str) 555 { 556 int val; 557 char *s; 558 559 val = strtoul(str, &s, 0); 560 if (s == str || *s != '\0' || val >= 0x100) 561 val = match_token(icmpcodes, str); 562 if (val < 0) 563 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 564 *codep = val; 565 return; 566 } 567 568 static void 569 print_reject_code(u_int16_t code) 570 { 571 char *s = match_value(icmpcodes, code); 572 573 if (s != NULL) 574 printf("unreach %s", s); 575 else 576 printf("unreach %u", code); 577 } 578 579 /* 580 * Returns the number of bits set (from left) in a contiguous bitmask, 581 * or -1 if the mask is not contiguous. 582 * XXX this needs a proper fix. 583 * This effectively works on masks in big-endian (network) format. 584 * when compiled on little endian architectures. 585 * 586 * First bit is bit 7 of the first byte -- note, for MAC addresses, 587 * the first bit on the wire is bit 0 of the first byte. 588 * len is the max length in bits. 589 */ 590 static int 591 contigmask(u_char *p, int len) 592 { 593 int i, n; 594 for (i=0; i<len ; i++) 595 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 596 break; 597 for (n=i+1; n < len; n++) 598 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 599 return -1; /* mask not contiguous */ 600 return i; 601 } 602 603 /* 604 * print flags set/clear in the two bitmasks passed as parameters. 605 * There is a specialized check for f_tcpflags. 606 */ 607 static void 608 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 609 { 610 char *comma=""; 611 int i; 612 u_char set = cmd->arg1 & 0xff; 613 u_char clear = (cmd->arg1 >> 8) & 0xff; 614 615 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 616 printf(" setup"); 617 return; 618 } 619 620 printf(" %s ", name); 621 for (i=0; list[i].x != 0; i++) { 622 if (set & list[i].x) { 623 set &= ~list[i].x; 624 printf("%s%s", comma, list[i].s); 625 comma = ","; 626 } 627 if (clear & list[i].x) { 628 clear &= ~list[i].x; 629 printf("%s!%s", comma, list[i].s); 630 comma = ","; 631 } 632 } 633 } 634 635 /* 636 * Print the ip address contained in a command. 637 */ 638 static void 639 print_ip(ipfw_insn_ip *cmd, char *s) 640 { 641 struct hostent *he = NULL; 642 int mb; 643 644 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 645 646 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 647 printf("me"); 648 return; 649 } 650 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 651 u_int32_t x, *d; 652 int i; 653 char comma = '{'; 654 655 x = cmd->o.arg1 - 1; 656 x = htonl( ~x ); 657 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 658 printf("%s/%d", inet_ntoa(cmd->addr), 659 contigmask((u_char *)&x, 32)); 660 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 661 x &= 0xff; /* base */ 662 d = (u_int32_t *)&(cmd->mask); 663 for (i=0; i < cmd->o.arg1; i++) 664 if (d[ i/32] & (1<<(i & 31))) { 665 printf("%c%d", comma, i+x); 666 comma = ','; 667 } 668 printf("}"); 669 return; 670 } 671 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 672 mb = 32; 673 else 674 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 675 if (mb == 32 && do_resolv) 676 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long), 677 AF_INET); 678 if (he != NULL) /* resolved to name */ 679 printf("%s", he->h_name); 680 else if (mb == 0) /* any */ 681 printf("any"); 682 else { /* numeric IP followed by some kind of mask */ 683 printf("%s", inet_ntoa(cmd->addr)); 684 if (mb < 0) 685 printf(":%s", inet_ntoa(cmd->mask)); 686 else if (mb < 32) 687 printf("/%d", mb); 688 } 689 } 690 691 /* 692 * prints a MAC address/mask pair 693 */ 694 static void 695 print_mac(u_char *addr, u_char *mask) 696 { 697 int l = contigmask(mask, 48); 698 699 if (l == 0) 700 printf(" any"); 701 else { 702 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 703 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 704 if (l == -1) 705 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 706 mask[0], mask[1], mask[2], 707 mask[3], mask[4], mask[5]); 708 else if (l < 48) 709 printf("/%d", l); 710 } 711 } 712 713 static void 714 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 715 { 716 u_int8_t type; 717 718 cmd->d[0] = 0; 719 while (*av) { 720 if (*av == ',') 721 av++; 722 723 type = strtoul(av, &av, 0); 724 725 if (*av != ',' && *av != '\0') 726 errx(EX_DATAERR, "invalid ICMP type"); 727 728 if (type > 31) 729 errx(EX_DATAERR, "ICMP type out of range"); 730 731 cmd->d[0] |= 1 << type; 732 } 733 cmd->o.opcode = O_ICMPTYPE; 734 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 735 } 736 737 static void 738 print_icmptypes(ipfw_insn_u32 *cmd) 739 { 740 int i; 741 char sep= ' '; 742 743 printf(" icmptypes"); 744 for (i = 0; i < 32; i++) { 745 if ( (cmd->d[0] & (1 << (i))) == 0) 746 continue; 747 printf("%c%d", sep, i); 748 sep = ','; 749 } 750 } 751 752 /* 753 * show_ipfw() prints the body of an ipfw rule. 754 * Because the standard rule has at least proto src_ip dst_ip, we use 755 * a helper function to produce these entries if not provided explicitly. 756 * The first argument is the list of fields we have, the second is 757 * the list of fields we want to be printed. 758 * 759 * Special cases if we have provided a MAC header: 760 * + if the rule does not contain IP addresses/ports, do not print them; 761 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 762 * 763 * Once we have 'have_options', IP header fields are printed as options. 764 */ 765 #define HAVE_PROTO 0x0001 766 #define HAVE_SRCIP 0x0002 767 #define HAVE_DSTIP 0x0004 768 #define HAVE_MAC 0x0008 769 #define HAVE_MACTYPE 0x0010 770 #define HAVE_OPTIONS 0x8000 771 772 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 773 static void 774 show_prerequisites(int *flags, int want, int cmd) 775 { 776 if ( (*flags & HAVE_IP) == HAVE_IP) 777 *flags |= HAVE_OPTIONS; 778 779 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 780 cmd != O_MAC_TYPE) { 781 /* 782 * mac-type was optimized out by the compiler, 783 * restore it 784 */ 785 printf(" any"); 786 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 787 return; 788 } 789 if ( !(*flags & HAVE_OPTIONS)) { 790 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 791 printf(" ip"); 792 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 793 printf(" from any"); 794 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 795 printf(" to any"); 796 } 797 *flags |= want; 798 } 799 800 static void 801 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth) 802 { 803 static int twidth = 0; 804 int l; 805 ipfw_insn *cmd; 806 int proto = 0; /* default */ 807 int flags = 0; /* prerequisites */ 808 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 809 int or_block = 0; /* we are in an or block */ 810 811 u_int32_t set_disable = rule->set_disable; 812 813 if (set_disable & (1 << rule->set)) { /* disabled */ 814 if (!show_sets) 815 return; 816 else 817 printf("# DISABLED "); 818 } 819 printf("%05u ", rule->rulenum); 820 821 if (do_acct) 822 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth, 823 rule->bcnt); 824 825 if (do_time) { 826 char timestr[30]; 827 828 if (twidth == 0) { 829 strcpy(timestr, ctime((time_t *)&twidth)); 830 *strchr(timestr, '\n') = '\0'; 831 twidth = strlen(timestr); 832 } 833 if (rule->timestamp) { 834 #if _FreeBSD_version < 500000 /* XXX check */ 835 #define _long_to_time(x) (time_t)(x) 836 #endif 837 time_t t = _long_to_time(rule->timestamp); 838 839 strcpy(timestr, ctime(&t)); 840 *strchr(timestr, '\n') = '\0'; 841 printf("%s ", timestr); 842 } else { 843 printf("%*s ", twidth, " "); 844 } 845 } 846 847 if (show_sets) 848 printf("set %d ", rule->set); 849 850 /* 851 * print the optional "match probability" 852 */ 853 if (rule->cmd_len > 0) { 854 cmd = rule->cmd ; 855 if (cmd->opcode == O_PROB) { 856 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 857 double d = 1.0 * p->d[0]; 858 859 d = (d / 0x7fffffff); 860 printf("prob %f ", d); 861 } 862 } 863 864 /* 865 * first print actions 866 */ 867 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 868 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 869 switch(cmd->opcode) { 870 case O_CHECK_STATE: 871 printf("check-state"); 872 flags = HAVE_IP; /* avoid printing anything else */ 873 break; 874 875 case O_ACCEPT: 876 printf("allow"); 877 break; 878 879 case O_COUNT: 880 printf("count"); 881 break; 882 883 case O_DENY: 884 printf("deny"); 885 break; 886 887 case O_REJECT: 888 if (cmd->arg1 == ICMP_REJECT_RST) 889 printf("reset"); 890 else if (cmd->arg1 == ICMP_UNREACH_HOST) 891 printf("reject"); 892 else 893 print_reject_code(cmd->arg1); 894 break; 895 896 case O_SKIPTO: 897 printf("skipto %u", cmd->arg1); 898 break; 899 900 case O_PIPE: 901 printf("pipe %u", cmd->arg1); 902 break; 903 904 case O_QUEUE: 905 printf("queue %u", cmd->arg1); 906 break; 907 908 case O_DIVERT: 909 printf("divert %u", cmd->arg1); 910 break; 911 912 case O_TEE: 913 printf("tee %u", cmd->arg1); 914 break; 915 916 case O_FORWARD_IP: 917 { 918 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 919 920 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 921 if (s->sa.sin_port) 922 printf(",%d", s->sa.sin_port); 923 } 924 break; 925 926 case O_LOG: /* O_LOG is printed last */ 927 logptr = (ipfw_insn_log *)cmd; 928 break; 929 930 default: 931 printf("** unrecognized action %d len %d", 932 cmd->opcode, cmd->len); 933 } 934 } 935 if (logptr) { 936 if (logptr->max_log > 0) 937 printf(" log logamount %d", logptr->max_log); 938 else 939 printf(" log"); 940 } 941 942 /* 943 * then print the body. 944 */ 945 if (rule->usr_flags & IPFW_USR_F_NORULE) { 946 /* empty rules before options */ 947 if (!do_compact) 948 printf(" ip from any to any"); 949 flags |= HAVE_IP | HAVE_OPTIONS; 950 } 951 952 for (l = rule->act_ofs, cmd = rule->cmd ; 953 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 954 /* useful alias */ 955 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 956 957 show_prerequisites(&flags, 0, cmd->opcode); 958 959 switch(cmd->opcode) { 960 case O_PROB: 961 break; /* done already */ 962 963 case O_PROBE_STATE: 964 break; /* no need to print anything here */ 965 966 case O_MACADDR2: { 967 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 968 969 if ((cmd->len & F_OR) && !or_block) 970 printf(" {"); 971 if (cmd->len & F_NOT) 972 printf(" not"); 973 printf(" MAC"); 974 flags |= HAVE_MAC; 975 print_mac( m->addr, m->mask); 976 print_mac( m->addr + 6, m->mask + 6); 977 } 978 break; 979 980 case O_MAC_TYPE: 981 if ((cmd->len & F_OR) && !or_block) 982 printf(" {"); 983 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 984 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 985 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 986 break; 987 988 case O_IP_SRC: 989 case O_IP_SRC_MASK: 990 case O_IP_SRC_ME: 991 case O_IP_SRC_SET: 992 show_prerequisites(&flags, HAVE_PROTO, 0); 993 if (!(flags & HAVE_SRCIP)) 994 printf(" from"); 995 if ((cmd->len & F_OR) && !or_block) 996 printf(" {"); 997 print_ip((ipfw_insn_ip *)cmd, 998 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 999 flags |= HAVE_SRCIP; 1000 break; 1001 1002 case O_IP_DST: 1003 case O_IP_DST_MASK: 1004 case O_IP_DST_ME: 1005 case O_IP_DST_SET: 1006 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1007 if (!(flags & HAVE_DSTIP)) 1008 printf(" to"); 1009 if ((cmd->len & F_OR) && !or_block) 1010 printf(" {"); 1011 print_ip((ipfw_insn_ip *)cmd, 1012 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1013 flags |= HAVE_DSTIP; 1014 break; 1015 1016 case O_IP_DSTPORT: 1017 show_prerequisites(&flags, HAVE_IP, 0); 1018 case O_IP_SRCPORT: 1019 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1020 if ((cmd->len & F_OR) && !or_block) 1021 printf(" {"); 1022 print_newports((ipfw_insn_u16 *)cmd, proto, 1023 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1024 break; 1025 1026 case O_PROTO: { 1027 struct protoent *pe; 1028 1029 if ((cmd->len & F_OR) && !or_block) 1030 printf(" {"); 1031 if (cmd->len & F_NOT) 1032 printf(" not"); 1033 proto = cmd->arg1; 1034 pe = getprotobynumber(cmd->arg1); 1035 if (flags & HAVE_OPTIONS) 1036 printf(" proto"); 1037 if (pe) 1038 printf(" %s", pe->p_name); 1039 else 1040 printf(" %u", cmd->arg1); 1041 } 1042 flags |= HAVE_PROTO; 1043 break; 1044 1045 default: /*options ... */ 1046 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1047 if ((cmd->len & F_OR) && !or_block) 1048 printf(" {"); 1049 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1050 printf(" not"); 1051 switch(cmd->opcode) { 1052 case O_FRAG: 1053 printf(" frag"); 1054 break; 1055 1056 case O_IN: 1057 printf(cmd->len & F_NOT ? " out" : " in"); 1058 break; 1059 1060 case O_LAYER2: 1061 printf(" layer2"); 1062 break; 1063 case O_XMIT: 1064 case O_RECV: 1065 case O_VIA: { 1066 char *s; 1067 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1068 1069 if (cmd->opcode == O_XMIT) 1070 s = "xmit"; 1071 else if (cmd->opcode == O_RECV) 1072 s = "recv"; 1073 else if (cmd->opcode == O_VIA) 1074 s = "via"; 1075 else 1076 s = "?huh?"; 1077 if (cmdif->name[0] == '\0') 1078 printf(" %s %s", s, 1079 inet_ntoa(cmdif->p.ip)); 1080 printf(" %s %s", s, cmdif->name); 1081 } 1082 break; 1083 1084 case O_IPID: 1085 printf(" ipid %u", cmd->arg1 ); 1086 break; 1087 1088 case O_IPTTL: 1089 printf(" ipttl %u", cmd->arg1 ); 1090 break; 1091 1092 case O_IPVER: 1093 printf(" ipver %u", cmd->arg1 ); 1094 break; 1095 1096 case O_IPPRECEDENCE: 1097 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1098 break; 1099 1100 case O_IPLEN: 1101 printf(" iplen %u", cmd->arg1 ); 1102 break; 1103 1104 case O_IPOPT: 1105 print_flags("ipoptions", cmd, f_ipopts); 1106 break; 1107 1108 case O_IPTOS: 1109 print_flags("iptos", cmd, f_iptos); 1110 break; 1111 1112 case O_ICMPTYPE: 1113 print_icmptypes((ipfw_insn_u32 *)cmd); 1114 break; 1115 1116 case O_ESTAB: 1117 printf(" established"); 1118 break; 1119 1120 case O_TCPFLAGS: 1121 print_flags("tcpflags", cmd, f_tcpflags); 1122 break; 1123 1124 case O_TCPOPTS: 1125 print_flags("tcpoptions", cmd, f_tcpopts); 1126 break; 1127 1128 case O_TCPWIN: 1129 printf(" tcpwin %d", ntohs(cmd->arg1)); 1130 break; 1131 1132 case O_TCPACK: 1133 printf(" tcpack %ld", ntohl(cmd32->d[0])); 1134 break; 1135 1136 case O_TCPSEQ: 1137 printf(" tcpseq %ld", ntohl(cmd32->d[0])); 1138 break; 1139 1140 case O_UID: 1141 { 1142 struct passwd *pwd = getpwuid(cmd32->d[0]); 1143 1144 if (pwd) 1145 printf(" uid %s", pwd->pw_name); 1146 else 1147 printf(" uid %u", cmd32->d[0]); 1148 } 1149 break; 1150 1151 case O_GID: 1152 { 1153 struct group *grp = getgrgid(cmd32->d[0]); 1154 1155 if (grp) 1156 printf(" gid %s", grp->gr_name); 1157 else 1158 printf(" gid %u", cmd32->d[0]); 1159 } 1160 break; 1161 1162 case O_KEEP_STATE: 1163 printf(" keep-state"); 1164 break; 1165 1166 case O_LIMIT: 1167 { 1168 struct _s_x *p = limit_masks; 1169 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1170 u_int8_t x = c->limit_mask; 1171 char *comma = " "; 1172 1173 printf(" limit"); 1174 for ( ; p->x != 0 ; p++) 1175 if ((x & p->x) == p->x) { 1176 x &= ~p->x; 1177 printf("%s%s", comma, p->s); 1178 comma = ","; 1179 } 1180 printf(" %d", c->conn_limit); 1181 } 1182 break; 1183 1184 default: 1185 printf(" [opcode %d len %d]", 1186 cmd->opcode, cmd->len); 1187 } 1188 } 1189 if (cmd->len & F_OR) { 1190 printf(" or"); 1191 or_block = 1; 1192 } else if (or_block) { 1193 printf(" }"); 1194 or_block = 0; 1195 } 1196 } 1197 show_prerequisites(&flags, HAVE_IP, 0); 1198 1199 printf("\n"); 1200 } 1201 1202 static void 1203 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth) 1204 { 1205 struct protoent *pe; 1206 struct in_addr a; 1207 1208 if (!do_expired) { 1209 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1210 return; 1211 } 1212 1213 printf("%05u %*llu %*llu (%ds)", d->rulenum, pcwidth, d->pcnt, 1214 bcwidth, d->bcnt, d->expire); 1215 switch (d->dyn_type) { 1216 case O_LIMIT_PARENT: 1217 printf(" PARENT %d", d->count); 1218 break; 1219 case O_LIMIT: 1220 printf(" LIMIT"); 1221 break; 1222 case O_KEEP_STATE: /* bidir, no mask */ 1223 printf(" STATE"); 1224 break; 1225 } 1226 1227 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL) 1228 printf(" %s", pe->p_name); 1229 else 1230 printf(" proto %u", d->id.u.ip.proto); 1231 1232 a.s_addr = htonl(d->id.u.ip.src_ip); 1233 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port); 1234 1235 a.s_addr = htonl(d->id.u.ip.dst_ip); 1236 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port); 1237 printf("\n"); 1238 } 1239 1240 int 1241 sort_q(const void *pa, const void *pb) 1242 { 1243 int rev = (do_sort < 0); 1244 int field = rev ? -do_sort : do_sort; 1245 long long res = 0; 1246 const struct dn_ioc_flowqueue *a = pa; 1247 const struct dn_ioc_flowqueue *b = pb; 1248 1249 switch (field) { 1250 case 1: /* pkts */ 1251 res = a->len - b->len; 1252 break; 1253 case 2: /* bytes */ 1254 res = a->len_bytes - b->len_bytes; 1255 break; 1256 1257 case 3: /* tot pkts */ 1258 res = a->tot_pkts - b->tot_pkts; 1259 break; 1260 1261 case 4: /* tot bytes */ 1262 res = a->tot_bytes - b->tot_bytes; 1263 break; 1264 } 1265 if (res < 0) 1266 res = -1; 1267 if (res > 0) 1268 res = 1; 1269 return (int)(rev ? res : -res); 1270 } 1271 1272 static void 1273 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) 1274 { 1275 int l; 1276 1277 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1278 fs->flow_mask.u.ip.proto, 1279 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, 1280 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); 1281 if (fs->rq_elements == 0) 1282 return; 1283 1284 printf("BKT Prot ___Source IP/port____ " 1285 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1286 if (do_sort != 0) 1287 heapsort(q, fs->rq_elements, sizeof(*q), sort_q); 1288 for (l = 0; l < fs->rq_elements; l++) { 1289 struct in_addr ina; 1290 struct protoent *pe; 1291 1292 ina.s_addr = htonl(q[l].id.u.ip.src_ip); 1293 printf("%3d ", q[l].hash_slot); 1294 pe = getprotobynumber(q[l].id.u.ip.proto); 1295 if (pe) 1296 printf("%-4s ", pe->p_name); 1297 else 1298 printf("%4u ", q[l].id.u.ip.proto); 1299 printf("%15s/%-5d ", 1300 inet_ntoa(ina), q[l].id.u.ip.src_port); 1301 ina.s_addr = htonl(q[l].id.u.ip.dst_ip); 1302 printf("%15s/%-5d ", 1303 inet_ntoa(ina), q[l].id.u.ip.dst_port); 1304 printf("%4qu %8qu %2u %4u %3u\n", 1305 q[l].tot_pkts, q[l].tot_bytes, 1306 q[l].len, q[l].len_bytes, q[l].drops); 1307 if (verbose) 1308 printf(" S %20qd F %20qd\n", 1309 q[l].S, q[l].F); 1310 } 1311 } 1312 1313 static void 1314 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) 1315 { 1316 int l; 1317 char qs[30]; 1318 char plr[30]; 1319 char red[90]; /* Display RED parameters */ 1320 1321 l = fs->qsize; 1322 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1323 if (l >= 8192) 1324 sprintf(qs, "%d KB", l / 1024); 1325 else 1326 sprintf(qs, "%d B", l); 1327 } else 1328 sprintf(qs, "%3d sl.", l); 1329 if (fs->plr) 1330 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1331 else 1332 plr[0] = '\0'; 1333 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1334 sprintf(red, 1335 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1336 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1337 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1338 SCALE_VAL(fs->min_th), 1339 SCALE_VAL(fs->max_th), 1340 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1341 else 1342 sprintf(red, "droptail"); 1343 1344 printf("%s %s%s %d queues (%d buckets) %s\n", 1345 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1346 } 1347 1348 static void 1349 list_pipes(void *data, int nbytes, int ac, char *av[]) 1350 { 1351 u_long rulenum; 1352 void *next = data; 1353 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; 1354 struct dn_ioc_flowset *fs; 1355 struct dn_ioc_flowqueue *q; 1356 int l; 1357 1358 if (ac > 0) 1359 rulenum = strtoul(*av++, NULL, 10); 1360 else 1361 rulenum = 0; 1362 for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) { 1363 double b = p->bandwidth; 1364 char buf[30]; 1365 char prefix[80]; 1366 1367 if (p->fs.fs_type != DN_IS_PIPE) 1368 break; /* done with pipes, now queues */ 1369 1370 /* 1371 * compute length, as pipe have variable size 1372 */ 1373 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1374 next = (void *)p + l; 1375 nbytes -= l; 1376 1377 if (rulenum != 0 && rulenum != p->pipe_nr) 1378 continue; 1379 1380 /* 1381 * Print rate 1382 */ 1383 if (b == 0) 1384 sprintf(buf, "unlimited"); 1385 else if (b >= 1000000) 1386 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1387 else if (b >= 1000) 1388 sprintf(buf, "%7.3f Kbit/s", b/1000); 1389 else 1390 sprintf(buf, "%7.3f bit/s ", b); 1391 1392 sprintf(prefix, "%05d: %s %4d ms ", 1393 p->pipe_nr, buf, p->delay); 1394 print_flowset_parms(&p->fs, prefix); 1395 if (verbose) 1396 printf(" V %20qd\n", p->V >> MY_M); 1397 1398 q = (struct dn_ioc_flowqueue *)(p+1); 1399 list_queues(&p->fs, q); 1400 } 1401 for (fs = next; nbytes >= sizeof(*fs); fs = next) { 1402 char prefix[80]; 1403 1404 if (fs->fs_type != DN_IS_QUEUE) 1405 break; 1406 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1407 next = (void *)fs + l; 1408 nbytes -= l; 1409 q = (struct dn_ioc_flowqueue *)(fs+1); 1410 sprintf(prefix, "q%05d: weight %d pipe %d ", 1411 fs->fs_nr, fs->weight, fs->parent_nr); 1412 print_flowset_parms(fs, prefix); 1413 list_queues(fs, q); 1414 } 1415 } 1416 1417 /* 1418 * This one handles all set-related commands 1419 * ipfw set { show | enable | disable } 1420 * ipfw set swap X Y 1421 * ipfw set move X to Y 1422 * ipfw set move rule X to Y 1423 */ 1424 static void 1425 sets_handler(int ac, char *av[]) 1426 { 1427 u_int32_t set_disable, masks[2]; 1428 int i, nbytes; 1429 u_int16_t rulenum; 1430 u_int8_t cmd, new_set; 1431 1432 ac--; 1433 av++; 1434 1435 if (!ac) 1436 errx(EX_USAGE, "set needs command"); 1437 if (!strncmp(*av, "show", strlen(*av)) ) { 1438 void *data; 1439 char *msg; 1440 1441 nbytes = sizeof(struct ipfw_ioc_rule); 1442 if ((data = malloc(nbytes)) == NULL) 1443 err(EX_OSERR, "malloc"); 1444 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1445 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1446 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable; 1447 1448 for (i = 0, msg = "disable" ; i < 31; i++) 1449 if ( (set_disable & (1<<i))) { 1450 printf("%s %d", msg, i); 1451 msg = ""; 1452 } 1453 msg = (set_disable) ? " enable" : "enable"; 1454 for (i = 0; i < 31; i++) 1455 if ( !(set_disable & (1<<i))) { 1456 printf("%s %d", msg, i); 1457 msg = ""; 1458 } 1459 printf("\n"); 1460 } else if (!strncmp(*av, "swap", strlen(*av))) { 1461 ac--; av++; 1462 if (ac != 2) 1463 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1464 rulenum = atoi(av[0]); 1465 new_set = atoi(av[1]); 1466 if (!isdigit(*(av[0])) || rulenum > 30) 1467 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1468 if (!isdigit(*(av[1])) || new_set > 30) 1469 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1470 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1471 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1472 masks, sizeof(u_int32_t)); 1473 } else if (!strncmp(*av, "move", strlen(*av))) { 1474 ac--; av++; 1475 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1476 cmd = 2; 1477 ac--; av++; 1478 } else 1479 cmd = 3; 1480 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1481 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1482 rulenum = atoi(av[0]); 1483 new_set = atoi(av[2]); 1484 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1485 (cmd == 2 && rulenum == 65535) ) 1486 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1487 if (!isdigit(*(av[2])) || new_set > 30) 1488 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1489 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1490 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1491 masks, sizeof(u_int32_t)); 1492 } else if (!strncmp(*av, "disable", strlen(*av)) || 1493 !strncmp(*av, "enable", strlen(*av)) ) { 1494 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1495 1496 ac--; av++; 1497 masks[0] = masks[1] = 0; 1498 1499 while (ac) { 1500 if (isdigit(**av)) { 1501 i = atoi(*av); 1502 if (i < 0 || i > 30) 1503 errx(EX_DATAERR, 1504 "invalid set number %d\n", i); 1505 masks[which] |= (1<<i); 1506 } else if (!strncmp(*av, "disable", strlen(*av))) 1507 which = 0; 1508 else if (!strncmp(*av, "enable", strlen(*av))) 1509 which = 1; 1510 else 1511 errx(EX_DATAERR, 1512 "invalid set command %s\n", *av); 1513 av++; ac--; 1514 } 1515 if ( (masks[0] & masks[1]) != 0 ) 1516 errx(EX_DATAERR, 1517 "cannot enable and disable the same set\n"); 1518 1519 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1520 if (i) 1521 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1522 } else 1523 errx(EX_USAGE, "invalid set command %s\n", *av); 1524 } 1525 1526 static void 1527 sysctl_handler(int ac, char *av[], int which) 1528 { 1529 ac--; 1530 av++; 1531 1532 if (*av == NULL) { 1533 warnx("missing keyword to enable/disable\n"); 1534 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1535 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1536 &which, sizeof(which)); 1537 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1538 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1539 &which, sizeof(which)); 1540 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1541 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1542 &which, sizeof(which)); 1543 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1544 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1545 &which, sizeof(which)); 1546 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1547 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1548 &which, sizeof(which)); 1549 } else { 1550 warnx("unrecognize enable/disable keyword: %s\n", *av); 1551 } 1552 } 1553 1554 static void 1555 list(int ac, char *av[]) 1556 { 1557 struct ipfw_ioc_rule *r; 1558 struct ipfw_ioc_state *dynrules, *d; 1559 1560 void *data = NULL; 1561 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1562 int exitval = EX_OK; 1563 int lac; 1564 char **lav; 1565 u_long rnum; 1566 char *endptr; 1567 int seen = 0; 1568 1569 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1570 int nalloc = 1024; /* start somewhere... */ 1571 1572 ac--; 1573 av++; 1574 1575 /* get rules or pipes from kernel, resizing array as necessary */ 1576 nbytes = nalloc; 1577 1578 while (nbytes >= nalloc) { 1579 nalloc = nalloc * 2 + 200; 1580 nbytes = nalloc; 1581 if ((data = realloc(data, nbytes)) == NULL) 1582 err(EX_OSERR, "realloc"); 1583 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1584 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1585 do_pipe ? "DUMMYNET" : "FW"); 1586 } 1587 1588 if (do_pipe) { 1589 list_pipes(data, nbytes, ac, av); 1590 goto done; 1591 } 1592 1593 /* 1594 * Count static rules. 1595 */ 1596 r = data; 1597 nstat = r->static_count; 1598 1599 /* 1600 * Count dynamic rules. This is easier as they have 1601 * fixed size. 1602 */ 1603 dynrules = (struct ipfw_ioc_state *)((void *)r + r->static_len); 1604 ndyn = (nbytes - r->static_len) / sizeof(*dynrules); 1605 1606 /* if showing stats, figure out column widths ahead of time */ 1607 bcwidth = pcwidth = 0; 1608 if (do_acct) { 1609 for (n = 0, r = data; n < nstat; 1610 n++, r = (void *)r + IOC_RULESIZE(r)) { 1611 /* packet counter */ 1612 width = snprintf(NULL, 0, "%llu", r->pcnt); 1613 if (width > pcwidth) 1614 pcwidth = width; 1615 1616 /* byte counter */ 1617 width = snprintf(NULL, 0, "%llu", r->bcnt); 1618 if (width > bcwidth) 1619 bcwidth = width; 1620 } 1621 } 1622 if (do_dynamic && ndyn) { 1623 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1624 width = snprintf(NULL, 0, "%llu", d->pcnt); 1625 if (width > pcwidth) 1626 pcwidth = width; 1627 1628 width = snprintf(NULL, 0, "%llu", d->bcnt); 1629 if (width > bcwidth) 1630 bcwidth = width; 1631 } 1632 } 1633 /* if no rule numbers were specified, list all rules */ 1634 if (ac == 0) { 1635 for (n = 0, r = data; n < nstat; 1636 n++, r = (void *)r + IOC_RULESIZE(r) ) 1637 show_ipfw(r, pcwidth, bcwidth); 1638 1639 if (do_dynamic && ndyn) { 1640 printf("## Dynamic rules (%d):\n", ndyn); 1641 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1642 show_dyn_ipfw(d, pcwidth, bcwidth); 1643 } 1644 goto done; 1645 } 1646 1647 /* display specific rules requested on command line */ 1648 1649 for (lac = ac, lav = av; lac != 0; lac--) { 1650 /* convert command line rule # */ 1651 rnum = strtoul(*lav++, &endptr, 10); 1652 if (*endptr) { 1653 exitval = EX_USAGE; 1654 warnx("invalid rule number: %s", *(lav - 1)); 1655 continue; 1656 } 1657 for (n = seen = 0, r = data; n < nstat; 1658 n++, r = (void *)r + IOC_RULESIZE(r) ) { 1659 if (r->rulenum > rnum) 1660 break; 1661 if (r->rulenum == rnum) { 1662 show_ipfw(r, pcwidth, bcwidth); 1663 seen = 1; 1664 } 1665 } 1666 if (!seen) { 1667 /* give precedence to other error(s) */ 1668 if (exitval == EX_OK) 1669 exitval = EX_UNAVAILABLE; 1670 warnx("rule %lu does not exist", rnum); 1671 } 1672 } 1673 1674 if (do_dynamic && ndyn) { 1675 printf("## Dynamic rules:\n"); 1676 for (lac = ac, lav = av; lac != 0; lac--) { 1677 rnum = strtoul(*lav++, &endptr, 10); 1678 if (*endptr) 1679 /* already warned */ 1680 continue; 1681 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1682 if (d->rulenum > rnum) 1683 break; 1684 if (d->rulenum == rnum) 1685 show_dyn_ipfw(d, pcwidth, bcwidth); 1686 } 1687 } 1688 } 1689 1690 ac = 0; 1691 1692 done: 1693 free(data); 1694 1695 if (exitval != EX_OK) 1696 exit(exitval); 1697 } 1698 1699 static void 1700 show_usage(void) 1701 { 1702 fprintf(stderr, "usage: ipfw [options]\n" 1703 " add [number] rule\n" 1704 " pipe number config [pipeconfig]\n" 1705 " queue number config [queueconfig]\n" 1706 " [pipe] flush\n" 1707 " [pipe] delete number ...\n" 1708 " [pipe] {list|show} [number ...]\n" 1709 " {zero|resetlog} [number ...]\n" 1710 "do \"ipfw -h\" or see ipfw manpage for details\n" 1711 ); 1712 1713 exit(EX_USAGE); 1714 } 1715 1716 static void 1717 help(void) 1718 { 1719 1720 fprintf(stderr, "ipfw syntax summary:\n" 1721 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1722 "ipfw {pipe|queue} N config BODY\n" 1723 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1724 "\n" 1725 "RULE: [1..] [PROB] BODY\n" 1726 "RULENUM: INTEGER(1..65534)\n" 1727 "PROB: prob REAL(0..1)\n" 1728 "BODY: check-state [LOG] (no body) |\n" 1729 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1730 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1731 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1732 "ADDR: [ MAC dst src ether_type ] \n" 1733 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1734 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1735 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1736 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1737 ); 1738 exit(0); 1739 } 1740 1741 1742 static int 1743 lookup_host (char *host, struct in_addr *ipaddr) 1744 { 1745 struct hostent *he; 1746 1747 if (!inet_aton(host, ipaddr)) { 1748 if ((he = gethostbyname(host)) == NULL) 1749 return(-1); 1750 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1751 } 1752 return(0); 1753 } 1754 1755 /* 1756 * fills the addr and mask fields in the instruction as appropriate from av. 1757 * Update length as appropriate. 1758 * The following formats are allowed: 1759 * any matches any IP. Actually returns an empty instruction. 1760 * me returns O_IP_*_ME 1761 * 1.2.3.4 single IP address 1762 * 1.2.3.4:5.6.7.8 address:mask 1763 * 1.2.3.4/24 address/mask 1764 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1765 */ 1766 static void 1767 fill_ip(ipfw_insn_ip *cmd, char *av) 1768 { 1769 char *p = NULL, md = 0; 1770 u_int32_t i; 1771 1772 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1773 1774 if (!strncmp(av, "any", strlen(av))) 1775 return; 1776 1777 if (!strncmp(av, "me", strlen(av))) { 1778 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1779 return; 1780 } 1781 1782 p = strchr(av, '/'); 1783 if (!p) 1784 p = strchr(av, ':'); 1785 if (p) { 1786 md = *p; 1787 *p++ = '\0'; 1788 } 1789 1790 if (lookup_host(av, &cmd->addr) != 0) 1791 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1792 switch (md) { 1793 case ':': 1794 if (!inet_aton(p, &cmd->mask)) 1795 errx(EX_DATAERR, "bad netmask ``%s''", p); 1796 break; 1797 case '/': 1798 i = atoi(p); 1799 if (i == 0) 1800 cmd->mask.s_addr = htonl(0); 1801 else if (i > 32) 1802 errx(EX_DATAERR, "bad width ``%s''", p); 1803 else 1804 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1805 break; 1806 default: 1807 cmd->mask.s_addr = htonl(~0); 1808 break; 1809 } 1810 cmd->addr.s_addr &= cmd->mask.s_addr; 1811 /* 1812 * now look if we have a set of addresses. They are stored as follows: 1813 * arg1 is the set size (powers of 2, 2..256) 1814 * addr is the base address IN HOST FORMAT 1815 * mask.. is an array of u_int32_t with bits set. 1816 */ 1817 if (p) 1818 p = strchr(p, '{'); 1819 if (p) { /* fetch addresses */ 1820 u_int32_t *d; 1821 int low, high; 1822 int i = contigmask((u_char *)&(cmd->mask), 32); 1823 1824 if (i < 24 || i > 31) { 1825 fprintf(stderr, "invalid set with mask %d\n", 1826 i); 1827 exit(0); 1828 } 1829 cmd->o.arg1 = 1<<(32-i); 1830 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1831 d = (u_int32_t *)&cmd->mask; 1832 cmd->o.opcode = O_IP_DST_SET; /* default */ 1833 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1834 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1835 d[i] = 0; /* clear masks */ 1836 1837 av = p+1; 1838 low = cmd->addr.s_addr & 0xff; 1839 high = low + cmd->o.arg1 - 1; 1840 while (isdigit(*av)) { 1841 char *s; 1842 u_int16_t a = strtol(av, &s, 0); 1843 1844 if (s == av) /* no parameter */ 1845 break; 1846 if (a < low || a > high) { 1847 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1848 a, low, high); 1849 exit(0); 1850 } 1851 a -= low; 1852 d[ a/32] |= 1<<(a & 31); 1853 if (*s != ',') 1854 break; 1855 av = s+1; 1856 } 1857 return; 1858 } 1859 1860 if (cmd->mask.s_addr == 0) { /* any */ 1861 if (cmd->o.len & F_NOT) 1862 errx(EX_DATAERR, "not any never matches"); 1863 else /* useless, nuke it */ 1864 return; 1865 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1866 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1867 else /* addr/mask */ 1868 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1869 } 1870 1871 1872 /* 1873 * helper function to process a set of flags and set bits in the 1874 * appropriate masks. 1875 */ 1876 static void 1877 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1878 struct _s_x *flags, char *p) 1879 { 1880 u_int8_t set=0, clear=0; 1881 1882 while (p && *p) { 1883 char *q; /* points to the separator */ 1884 int val; 1885 u_int8_t *which; /* mask we are working on */ 1886 1887 if (*p == '!') { 1888 p++; 1889 which = &clear; 1890 } else 1891 which = &set; 1892 q = strchr(p, ','); 1893 if (q) 1894 *q++ = '\0'; 1895 val = match_token(flags, p); 1896 if (val <= 0) 1897 errx(EX_DATAERR, "invalid flag %s", p); 1898 *which |= (u_int8_t)val; 1899 p = q; 1900 } 1901 cmd->opcode = opcode; 1902 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 1903 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 1904 } 1905 1906 1907 static void 1908 delete(int ac, char *av[]) 1909 { 1910 u_int32_t rulenum; 1911 struct dn_ioc_pipe pipe; 1912 int i; 1913 int exitval = EX_OK; 1914 int do_set = 0; 1915 1916 memset(&pipe, 0, sizeof pipe); 1917 1918 av++; ac--; 1919 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 1920 do_set = 1; /* delete set */ 1921 ac--; av++; 1922 } 1923 1924 /* Rule number */ 1925 while (ac && isdigit(**av)) { 1926 i = atoi(*av); av++; ac--; 1927 if (do_pipe) { 1928 if (do_pipe == 1) 1929 pipe.pipe_nr = i; 1930 else 1931 pipe.fs.fs_nr = i; 1932 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 1933 &pipe, sizeof pipe); 1934 if (i) { 1935 exitval = 1; 1936 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 1937 do_pipe == 1 ? pipe.pipe_nr : 1938 pipe.fs.fs_nr); 1939 } 1940 } else { 1941 rulenum = (i & 0xffff) | (do_set << 24); 1942 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 1943 sizeof rulenum); 1944 if (i) { 1945 exitval = EX_UNAVAILABLE; 1946 warn("rule %u: setsockopt(IP_FW_DEL)", 1947 rulenum); 1948 } 1949 } 1950 } 1951 if (exitval != EX_OK) 1952 exit(exitval); 1953 } 1954 1955 1956 /* 1957 * fill the interface structure. We do not check the name as we can 1958 * create interfaces dynamically, so checking them at insert time 1959 * makes relatively little sense. 1960 * Interface names containing '*', '?', or '[' are assumed to be shell 1961 * patterns which match interfaces. 1962 */ 1963 static void 1964 fill_iface(ipfw_insn_if *cmd, char *arg) 1965 { 1966 cmd->name[0] = '\0'; 1967 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 1968 1969 /* Parse the interface or address */ 1970 if (!strcmp(arg, "any")) 1971 cmd->o.len = 0; /* effectively ignore this command */ 1972 else if (!isdigit(*arg)) { 1973 strlcpy(cmd->name, arg, sizeof(cmd->name)); 1974 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 1975 } else if (!inet_aton(arg, &cmd->p.ip)) 1976 errx(EX_DATAERR, "bad ip address ``%s''", arg); 1977 } 1978 1979 static unsigned long 1980 getbw(const char *str, u_short *flags, int kb) 1981 { 1982 char *end; 1983 unsigned long val; 1984 int inbytes = 0; 1985 1986 val = strtoul(str, &end, 0); 1987 if (*end == 'k' || *end == 'K') { 1988 ++end; 1989 val *= kb; 1990 } else if (*end == 'm' || *end == 'M') { 1991 ++end; 1992 val *= kb * kb; 1993 } 1994 1995 /* 1996 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 1997 * trailer assume bits. 1998 */ 1999 if (strncasecmp(end, "bit", 3) == 0) { 2000 ; 2001 } else if (strncasecmp(end, "byte", 4) == 0) { 2002 inbytes = 1; 2003 } else if (*end == 'b') { 2004 ; 2005 } else if (*end == 'B') { 2006 inbytes = 1; 2007 } 2008 2009 /* 2010 * Return in bits if flags is NULL, else flag bits 2011 * or bytes in flags and return the unconverted value. 2012 */ 2013 if (inbytes && flags) 2014 *flags |= DN_QSIZE_IS_BYTES; 2015 else if (inbytes && flags == NULL) 2016 val *= 8; 2017 return(val); 2018 } 2019 2020 /* 2021 * the following macro returns an error message if we run out of 2022 * arguments. 2023 */ 2024 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2025 2026 static void 2027 config_pipe(int ac, char **av) 2028 { 2029 struct dn_ioc_pipe pipe; 2030 int i; 2031 char *end; 2032 u_int32_t a; 2033 void *par = NULL; 2034 2035 memset(&pipe, 0, sizeof pipe); 2036 2037 av++; ac--; 2038 /* Pipe number */ 2039 if (ac && isdigit(**av)) { 2040 i = atoi(*av); av++; ac--; 2041 if (do_pipe == 1) 2042 pipe.pipe_nr = i; 2043 else 2044 pipe.fs.fs_nr = i; 2045 } 2046 while (ac > 0) { 2047 double d; 2048 int tok = match_token(dummynet_params, *av); 2049 ac--; av++; 2050 2051 switch(tok) { 2052 case TOK_NOERROR: 2053 pipe.fs.flags_fs |= DN_NOERROR; 2054 break; 2055 2056 case TOK_PLR: 2057 NEED1("plr needs argument 0..1\n"); 2058 d = strtod(av[0], NULL); 2059 if (d > 1) 2060 d = 1; 2061 else if (d < 0) 2062 d = 0; 2063 pipe.fs.plr = (int)(d*0x7fffffff); 2064 ac--; av++; 2065 break; 2066 2067 case TOK_QUEUE: 2068 NEED1("queue needs queue size\n"); 2069 end = NULL; 2070 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2071 ac--; av++; 2072 break; 2073 2074 case TOK_BUCKETS: 2075 NEED1("buckets needs argument\n"); 2076 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2077 ac--; av++; 2078 break; 2079 2080 case TOK_MASK: 2081 NEED1("mask needs mask specifier\n"); 2082 /* 2083 * per-flow queue, mask is dst_ip, dst_port, 2084 * src_ip, src_port, proto measured in bits 2085 */ 2086 par = NULL; 2087 2088 pipe.fs.flow_mask.type = ETHERTYPE_IP; 2089 pipe.fs.flow_mask.u.ip.dst_ip = 0; 2090 pipe.fs.flow_mask.u.ip.src_ip = 0; 2091 pipe.fs.flow_mask.u.ip.dst_port = 0; 2092 pipe.fs.flow_mask.u.ip.src_port = 0; 2093 pipe.fs.flow_mask.u.ip.proto = 0; 2094 end = NULL; 2095 2096 while (ac >= 1) { 2097 u_int32_t *p32 = NULL; 2098 u_int16_t *p16 = NULL; 2099 2100 tok = match_token(dummynet_params, *av); 2101 ac--; av++; 2102 switch(tok) { 2103 case TOK_ALL: 2104 /* 2105 * special case, all bits significant 2106 */ 2107 pipe.fs.flow_mask.u.ip.dst_ip = ~0; 2108 pipe.fs.flow_mask.u.ip.src_ip = ~0; 2109 pipe.fs.flow_mask.u.ip.dst_port = ~0; 2110 pipe.fs.flow_mask.u.ip.src_port = ~0; 2111 pipe.fs.flow_mask.u.ip.proto = ~0; 2112 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2113 goto end_mask; 2114 2115 case TOK_DSTIP: 2116 p32 = &pipe.fs.flow_mask.u.ip.dst_ip; 2117 break; 2118 2119 case TOK_SRCIP: 2120 p32 = &pipe.fs.flow_mask.u.ip.src_ip; 2121 break; 2122 2123 case TOK_DSTPORT: 2124 p16 = &pipe.fs.flow_mask.u.ip.dst_port; 2125 break; 2126 2127 case TOK_SRCPORT: 2128 p16 = &pipe.fs.flow_mask.u.ip.src_port; 2129 break; 2130 2131 case TOK_PROTO: 2132 break; 2133 2134 default: 2135 ac++; av--; /* backtrack */ 2136 goto end_mask; 2137 } 2138 if (ac < 1) 2139 errx(EX_USAGE, "mask: value missing"); 2140 if (*av[0] == '/') { 2141 a = strtoul(av[0]+1, &end, 0); 2142 a = (a == 32) ? ~0 : (1 << a) - 1; 2143 } else 2144 a = strtoul(av[0], &end, 0); 2145 if (p32 != NULL) 2146 *p32 = a; 2147 else if (p16 != NULL) { 2148 if (a > 65535) 2149 errx(EX_DATAERR, 2150 "mask: must be 16 bit"); 2151 *p16 = (u_int16_t)a; 2152 } else { 2153 if (a > 255) 2154 errx(EX_DATAERR, 2155 "mask: must be 8 bit"); 2156 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; 2157 } 2158 if (a != 0) 2159 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2160 ac--; av++; 2161 } /* end while, config masks */ 2162 end_mask: 2163 break; 2164 2165 case TOK_RED: 2166 case TOK_GRED: 2167 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2168 pipe.fs.flags_fs |= DN_IS_RED; 2169 if (tok == TOK_GRED) 2170 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2171 /* 2172 * the format for parameters is w_q/min_th/max_th/max_p 2173 */ 2174 if ((end = strsep(&av[0], "/"))) { 2175 double w_q = strtod(end, NULL); 2176 if (w_q > 1 || w_q <= 0) 2177 errx(EX_DATAERR, "0 < w_q <= 1"); 2178 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2179 } 2180 if ((end = strsep(&av[0], "/"))) { 2181 pipe.fs.min_th = strtoul(end, &end, 0); 2182 if (*end == 'K' || *end == 'k') 2183 pipe.fs.min_th *= 1024; 2184 } 2185 if ((end = strsep(&av[0], "/"))) { 2186 pipe.fs.max_th = strtoul(end, &end, 0); 2187 if (*end == 'K' || *end == 'k') 2188 pipe.fs.max_th *= 1024; 2189 } 2190 if ((end = strsep(&av[0], "/"))) { 2191 double max_p = strtod(end, NULL); 2192 if (max_p > 1 || max_p <= 0) 2193 errx(EX_DATAERR, "0 < max_p <= 1"); 2194 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2195 } 2196 ac--; av++; 2197 break; 2198 2199 case TOK_DROPTAIL: 2200 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2201 break; 2202 2203 case TOK_BW: 2204 NEED1("bw needs bandwidth\n"); 2205 if (do_pipe != 1) 2206 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2207 /* 2208 * set bandwidth value 2209 */ 2210 pipe.bandwidth = getbw(av[0], NULL, 1000); 2211 if (pipe.bandwidth < 0) 2212 errx(EX_DATAERR, "bandwidth too large"); 2213 ac--; av++; 2214 break; 2215 2216 case TOK_DELAY: 2217 if (do_pipe != 1) 2218 errx(EX_DATAERR, "delay only valid for pipes"); 2219 NEED1("delay needs argument 0..10000ms\n"); 2220 pipe.delay = strtoul(av[0], NULL, 0); 2221 ac--; av++; 2222 break; 2223 2224 case TOK_WEIGHT: 2225 if (do_pipe == 1) 2226 errx(EX_DATAERR,"weight only valid for queues"); 2227 NEED1("weight needs argument 0..100\n"); 2228 pipe.fs.weight = strtoul(av[0], &end, 0); 2229 ac--; av++; 2230 break; 2231 2232 case TOK_PIPE: 2233 if (do_pipe == 1) 2234 errx(EX_DATAERR,"pipe only valid for queues"); 2235 NEED1("pipe needs pipe_number\n"); 2236 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2237 ac--; av++; 2238 break; 2239 2240 default: 2241 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2242 } 2243 } 2244 if (do_pipe == 1) { 2245 if (pipe.pipe_nr == 0) 2246 errx(EX_DATAERR, "pipe_nr must be > 0"); 2247 if (pipe.delay > 10000) 2248 errx(EX_DATAERR, "delay must be < 10000"); 2249 } else { /* do_pipe == 2, queue */ 2250 if (pipe.fs.parent_nr == 0) 2251 errx(EX_DATAERR, "pipe must be > 0"); 2252 if (pipe.fs.weight >100) 2253 errx(EX_DATAERR, "weight must be <= 100"); 2254 } 2255 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2256 if (pipe.fs.qsize > 1024*1024) 2257 errx(EX_DATAERR, "queue size must be < 1MB"); 2258 } else { 2259 if (pipe.fs.qsize > 100) 2260 errx(EX_DATAERR, "2 <= queue size <= 100"); 2261 } 2262 if (pipe.fs.flags_fs & DN_IS_RED) { 2263 size_t len; 2264 int lookup_depth, avg_pkt_size; 2265 double s, idle, weight, w_q; 2266 int clock_hz; 2267 int t; 2268 2269 if (pipe.fs.min_th >= pipe.fs.max_th) 2270 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2271 pipe.fs.min_th, pipe.fs.max_th); 2272 if (pipe.fs.max_th == 0) 2273 errx(EX_DATAERR, "max_th must be > 0"); 2274 2275 len = sizeof(int); 2276 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2277 &lookup_depth, &len, NULL, 0) == -1) 2278 2279 errx(1, "sysctlbyname(\"%s\")", 2280 "net.inet.ip.dummynet.red_lookup_depth"); 2281 if (lookup_depth == 0) 2282 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2283 " must be greater than zero"); 2284 2285 len = sizeof(int); 2286 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2287 &avg_pkt_size, &len, NULL, 0) == -1) 2288 2289 errx(1, "sysctlbyname(\"%s\")", 2290 "net.inet.ip.dummynet.red_avg_pkt_size"); 2291 if (avg_pkt_size == 0) 2292 errx(EX_DATAERR, 2293 "net.inet.ip.dummynet.red_avg_pkt_size must" 2294 " be greater than zero"); 2295 2296 len = sizeof(clock_hz); 2297 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, 2298 NULL, 0) == -1) { 2299 errx(1, "sysctlbyname(\"%s\")", 2300 "net.inet.ip.dummynet.hz"); 2301 } 2302 2303 /* 2304 * Ticks needed for sending a medium-sized packet. 2305 * Unfortunately, when we are configuring a WF2Q+ queue, we 2306 * do not have bandwidth information, because that is stored 2307 * in the parent pipe, and also we have multiple queues 2308 * competing for it. So we set s=0, which is not very 2309 * correct. But on the other hand, why do we want RED with 2310 * WF2Q+ ? 2311 */ 2312 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2313 s = 0; 2314 else 2315 s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; 2316 2317 /* 2318 * max idle time (in ticks) before avg queue size becomes 0. 2319 * NOTA: (3/w_q) is approx the value x so that 2320 * (1-w_q)^x < 10^-3. 2321 */ 2322 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2323 idle = s * 3. / w_q; 2324 pipe.fs.lookup_step = (int)idle / lookup_depth; 2325 if (!pipe.fs.lookup_step) 2326 pipe.fs.lookup_step = 1; 2327 weight = 1 - w_q; 2328 for (t = pipe.fs.lookup_step; t > 0; --t) 2329 weight *= weight; 2330 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2331 } 2332 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2333 sizeof pipe); 2334 if (i) 2335 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2336 } 2337 2338 static void 2339 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2340 { 2341 int i, l; 2342 2343 for (i=0; i<6; i++) 2344 addr[i] = mask[i] = 0; 2345 if (!strcmp(p, "any")) 2346 return; 2347 2348 for (i=0; *p && i<6;i++, p++) { 2349 addr[i] = strtol(p, &p, 16); 2350 if (*p != ':') /* we start with the mask */ 2351 break; 2352 } 2353 if (*p == '/') { /* mask len */ 2354 l = strtol(p+1, &p, 0); 2355 for (i=0; l>0; l -=8, i++) 2356 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2357 } else if (*p == '&') { /* mask */ 2358 for (i=0, p++; *p && i<6;i++, p++) { 2359 mask[i] = strtol(p, &p, 16); 2360 if (*p != ':') 2361 break; 2362 } 2363 } else if (*p == '\0') { 2364 for (i=0; i<6; i++) 2365 mask[i] = 0xff; 2366 } 2367 for (i=0; i<6; i++) 2368 addr[i] &= mask[i]; 2369 } 2370 2371 /* 2372 * helper function, updates the pointer to cmd with the length 2373 * of the current command, and also cleans up the first word of 2374 * the new command in case it has been clobbered before. 2375 */ 2376 static ipfw_insn * 2377 next_cmd(ipfw_insn *cmd) 2378 { 2379 cmd += F_LEN(cmd); 2380 bzero(cmd, sizeof(*cmd)); 2381 return cmd; 2382 } 2383 2384 /* 2385 * A function to fill simple commands of size 1. 2386 * Existing flags are preserved. 2387 */ 2388 static void 2389 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2390 { 2391 cmd->opcode = opcode; 2392 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2393 cmd->arg1 = arg; 2394 } 2395 2396 /* 2397 * Fetch and add the MAC address and type, with masks. This generates one or 2398 * two microinstructions, and returns the pointer to the last one. 2399 */ 2400 static ipfw_insn * 2401 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2402 { 2403 ipfw_insn_mac *mac; 2404 2405 if (ac < 2) 2406 errx(EX_DATAERR, "MAC dst src"); 2407 2408 cmd->opcode = O_MACADDR2; 2409 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2410 2411 mac = (ipfw_insn_mac *)cmd; 2412 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2413 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2414 return cmd; 2415 } 2416 2417 static ipfw_insn * 2418 add_mactype(ipfw_insn *cmd, int ac, char *av) 2419 { 2420 if (ac < 1) 2421 errx(EX_DATAERR, "missing MAC type"); 2422 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2423 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2424 cmd->opcode = O_MAC_TYPE; 2425 return cmd; 2426 } else 2427 return NULL; 2428 } 2429 2430 static ipfw_insn * 2431 add_proto(ipfw_insn *cmd, char *av) 2432 { 2433 struct protoent *pe; 2434 u_char proto = 0; 2435 2436 if (!strncmp(av, "all", strlen(av))) 2437 ; /* same as "ip" */ 2438 else if ((proto = atoi(av)) > 0) 2439 ; /* all done! */ 2440 else if ((pe = getprotobyname(av)) != NULL) 2441 proto = pe->p_proto; 2442 else 2443 return NULL; 2444 if (proto != IPPROTO_IP) 2445 fill_cmd(cmd, O_PROTO, 0, proto); 2446 return cmd; 2447 } 2448 2449 static ipfw_insn * 2450 add_srcip(ipfw_insn *cmd, char *av) 2451 { 2452 fill_ip((ipfw_insn_ip *)cmd, av); 2453 if (cmd->opcode == O_IP_DST_SET) /* set */ 2454 cmd->opcode = O_IP_SRC_SET; 2455 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2456 cmd->opcode = O_IP_SRC_ME; 2457 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2458 cmd->opcode = O_IP_SRC; 2459 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2460 cmd->opcode = O_IP_SRC_MASK; 2461 return cmd; 2462 } 2463 2464 static ipfw_insn * 2465 add_dstip(ipfw_insn *cmd, char *av) 2466 { 2467 fill_ip((ipfw_insn_ip *)cmd, av); 2468 if (cmd->opcode == O_IP_DST_SET) /* set */ 2469 ; 2470 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2471 cmd->opcode = O_IP_DST_ME; 2472 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2473 cmd->opcode = O_IP_DST; 2474 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2475 cmd->opcode = O_IP_DST_MASK; 2476 return cmd; 2477 } 2478 2479 static ipfw_insn * 2480 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2481 { 2482 if (!strncmp(av, "any", strlen(av))) { 2483 return NULL; 2484 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2485 /* XXX todo: check that we have a protocol with ports */ 2486 cmd->opcode = opcode; 2487 return cmd; 2488 } 2489 return NULL; 2490 } 2491 2492 /* 2493 * Parse arguments and assemble the microinstructions which make up a rule. 2494 * Rules are added into the 'rulebuf' and then copied in the correct order 2495 * into the actual rule. 2496 * 2497 * The syntax for a rule starts with the action, followed by an 2498 * optional log action, and the various match patterns. 2499 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2500 * (generated if the rule includes a keep-state option), then the 2501 * various match patterns, the "log" action, and the actual action. 2502 * 2503 */ 2504 static void 2505 add(int ac, char *av[]) 2506 { 2507 /* 2508 * rules are added into the 'rulebuf' and then copied in 2509 * the correct order into the actual rule. 2510 * Some things that need to go out of order (prob, action etc.) 2511 * go into actbuf[]. 2512 */ 2513 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX]; 2514 static uint32_t actbuf[IPFW_RULE_SIZE_MAX]; 2515 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX]; 2516 2517 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2518 ipfw_insn *first_cmd; /* first match pattern */ 2519 2520 struct ipfw_ioc_rule *rule; 2521 2522 /* 2523 * various flags used to record that we entered some fields. 2524 */ 2525 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2526 2527 int i; 2528 2529 int open_par = 0; /* open parenthesis ( */ 2530 2531 /* proto is here because it is used to fetch ports */ 2532 u_char proto = IPPROTO_IP; /* default protocol */ 2533 2534 double match_prob = 1; /* match probability, default is always match */ 2535 2536 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2537 bzero(cmdbuf, sizeof(cmdbuf)); 2538 bzero(rulebuf, sizeof(rulebuf)); 2539 2540 rule = (struct ipfw_ioc_rule *)rulebuf; 2541 cmd = (ipfw_insn *)cmdbuf; 2542 action = (ipfw_insn *)actbuf; 2543 2544 av++; ac--; 2545 2546 /* [rule N] -- Rule number optional */ 2547 if (ac && isdigit(**av)) { 2548 rule->rulenum = atoi(*av); 2549 av++; 2550 ac--; 2551 } 2552 2553 /* [set N] -- set number (0..30), optional */ 2554 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2555 int set = strtoul(av[1], NULL, 10); 2556 if (set < 0 || set > 30) 2557 errx(EX_DATAERR, "illegal set %s", av[1]); 2558 rule->set = set; 2559 av += 2; ac -= 2; 2560 } 2561 2562 /* [prob D] -- match probability, optional */ 2563 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2564 match_prob = strtod(av[1], NULL); 2565 2566 if (match_prob <= 0 || match_prob > 1) 2567 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2568 av += 2; ac -= 2; 2569 } 2570 2571 /* action -- mandatory */ 2572 NEED1("missing action"); 2573 i = match_token(rule_actions, *av); 2574 ac--; av++; 2575 action->len = 1; /* default */ 2576 switch(i) { 2577 case TOK_CHECKSTATE: 2578 have_state = action; 2579 action->opcode = O_CHECK_STATE; 2580 break; 2581 2582 case TOK_ACCEPT: 2583 action->opcode = O_ACCEPT; 2584 break; 2585 2586 case TOK_DENY: 2587 action->opcode = O_DENY; 2588 action->arg1 = 0; 2589 break; 2590 2591 case TOK_REJECT: 2592 action->opcode = O_REJECT; 2593 action->arg1 = ICMP_UNREACH_HOST; 2594 break; 2595 2596 case TOK_RESET: 2597 action->opcode = O_REJECT; 2598 action->arg1 = ICMP_REJECT_RST; 2599 break; 2600 2601 case TOK_UNREACH: 2602 action->opcode = O_REJECT; 2603 NEED1("missing reject code"); 2604 fill_reject_code(&action->arg1, *av); 2605 ac--; av++; 2606 break; 2607 2608 case TOK_COUNT: 2609 action->opcode = O_COUNT; 2610 break; 2611 2612 case TOK_QUEUE: 2613 case TOK_PIPE: 2614 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2615 case TOK_SKIPTO: 2616 if (i == TOK_QUEUE) 2617 action->opcode = O_QUEUE; 2618 else if (i == TOK_PIPE) 2619 action->opcode = O_PIPE; 2620 else if (i == TOK_SKIPTO) 2621 action->opcode = O_SKIPTO; 2622 NEED1("missing skipto/pipe/queue number"); 2623 action->arg1 = strtoul(*av, NULL, 10); 2624 av++; ac--; 2625 break; 2626 2627 case TOK_DIVERT: 2628 case TOK_TEE: 2629 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2630 NEED1("missing divert/tee port"); 2631 action->arg1 = strtoul(*av, NULL, 0); 2632 if (action->arg1 == 0) { 2633 struct servent *s; 2634 setservent(1); 2635 s = getservbyname(av[0], "divert"); 2636 if (s != NULL) 2637 action->arg1 = ntohs(s->s_port); 2638 else 2639 errx(EX_DATAERR, "illegal divert/tee port"); 2640 } 2641 ac--; av++; 2642 break; 2643 2644 case TOK_FORWARD: { 2645 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2646 char *s, *end; 2647 2648 NEED1("missing forward address[:port]"); 2649 2650 action->opcode = O_FORWARD_IP; 2651 action->len = F_INSN_SIZE(ipfw_insn_sa); 2652 2653 p->sa.sin_len = sizeof(struct sockaddr_in); 2654 p->sa.sin_family = AF_INET; 2655 p->sa.sin_port = 0; 2656 /* 2657 * locate the address-port separator (':' or ',') 2658 */ 2659 s = strchr(*av, ':'); 2660 if (s == NULL) 2661 s = strchr(*av, ','); 2662 if (s != NULL) { 2663 *(s++) = '\0'; 2664 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2665 if (s == end) 2666 errx(EX_DATAERR, 2667 "illegal forwarding port ``%s''", s); 2668 p->sa.sin_port = (u_short)i; 2669 } 2670 lookup_host(*av, &(p->sa.sin_addr)); 2671 } 2672 ac--; av++; 2673 break; 2674 2675 default: 2676 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2677 } 2678 action = next_cmd(action); 2679 2680 /* 2681 * [log [logamount N]] -- log, optional 2682 * 2683 * If exists, it goes first in the cmdbuf, but then it is 2684 * skipped in the copy section to the end of the buffer. 2685 */ 2686 if (ac && !strncmp(*av, "log", strlen(*av))) { 2687 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2688 2689 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2690 cmd->opcode = O_LOG; 2691 av++; ac--; 2692 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2693 ac--; av++; 2694 NEED1("logamount requires argument"); 2695 c->max_log = atoi(*av); 2696 if (c->max_log < 0) 2697 errx(EX_DATAERR, "logamount must be positive"); 2698 ac--; av++; 2699 } 2700 cmd = next_cmd(cmd); 2701 } 2702 2703 if (have_state) /* must be a check-state, we are done */ 2704 goto done; 2705 2706 #define OR_START(target) \ 2707 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2708 if (open_par) \ 2709 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2710 prev = NULL; \ 2711 open_par = 1; \ 2712 if ( (av[0])[1] == '\0') { \ 2713 ac--; av++; \ 2714 } else \ 2715 (*av)++; \ 2716 } \ 2717 target: \ 2718 2719 2720 #define CLOSE_PAR \ 2721 if (open_par) { \ 2722 if (ac && ( \ 2723 !strncmp(*av, ")", strlen(*av)) || \ 2724 !strncmp(*av, "}", strlen(*av)) )) { \ 2725 prev = NULL; \ 2726 open_par = 0; \ 2727 ac--; av++; \ 2728 } else \ 2729 errx(EX_USAGE, "missing \")\"\n"); \ 2730 } 2731 2732 #define NOT_BLOCK \ 2733 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2734 if (cmd->len & F_NOT) \ 2735 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2736 cmd->len |= F_NOT; \ 2737 ac--; av++; \ 2738 } 2739 2740 #define OR_BLOCK(target) \ 2741 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2742 if (prev == NULL || open_par == 0) \ 2743 errx(EX_DATAERR, "invalid OR block"); \ 2744 prev->len |= F_OR; \ 2745 ac--; av++; \ 2746 goto target; \ 2747 } \ 2748 CLOSE_PAR; 2749 2750 first_cmd = cmd; 2751 2752 #if 0 2753 /* 2754 * MAC addresses, optional. 2755 * If we have this, we skip the part "proto from src to dst" 2756 * and jump straight to the option parsing. 2757 */ 2758 NOT_BLOCK; 2759 NEED1("missing protocol"); 2760 if (!strncmp(*av, "MAC", strlen(*av)) || 2761 !strncmp(*av, "mac", strlen(*av))) { 2762 ac--; av++; /* the "MAC" keyword */ 2763 add_mac(cmd, ac, av); /* exits in case of errors */ 2764 cmd = next_cmd(cmd); 2765 ac -= 2; av += 2; /* dst-mac and src-mac */ 2766 NOT_BLOCK; 2767 NEED1("missing mac type"); 2768 if (add_mactype(cmd, ac, av[0])) 2769 cmd = next_cmd(cmd); 2770 ac--; av++; /* any or mac-type */ 2771 goto read_options; 2772 } 2773 #endif 2774 2775 /* 2776 * protocol, mandatory 2777 */ 2778 OR_START(get_proto); 2779 NOT_BLOCK; 2780 NEED1("missing protocol"); 2781 if (add_proto(cmd, *av)) { 2782 av++; ac--; 2783 if (F_LEN(cmd) == 0) /* plain IP */ 2784 proto = 0; 2785 else { 2786 proto = cmd->arg1; 2787 prev = cmd; 2788 cmd = next_cmd(cmd); 2789 } 2790 } else if (first_cmd != cmd) { 2791 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2792 } else 2793 goto read_options; 2794 OR_BLOCK(get_proto); 2795 2796 /* 2797 * "from", mandatory 2798 */ 2799 if (!ac || strncmp(*av, "from", strlen(*av))) 2800 errx(EX_USAGE, "missing ``from''"); 2801 ac--; av++; 2802 2803 /* 2804 * source IP, mandatory 2805 */ 2806 OR_START(source_ip); 2807 NOT_BLOCK; /* optional "not" */ 2808 NEED1("missing source address"); 2809 if (add_srcip(cmd, *av)) { 2810 ac--; av++; 2811 if (F_LEN(cmd) != 0) { /* ! any */ 2812 prev = cmd; 2813 cmd = next_cmd(cmd); 2814 } 2815 } 2816 OR_BLOCK(source_ip); 2817 2818 /* 2819 * source ports, optional 2820 */ 2821 NOT_BLOCK; /* optional "not" */ 2822 if (ac) { 2823 if (!strncmp(*av, "any", strlen(*av)) || 2824 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2825 ac--; av++; 2826 if (F_LEN(cmd) != 0) 2827 cmd = next_cmd(cmd); 2828 } 2829 } 2830 2831 /* 2832 * "to", mandatory 2833 */ 2834 if (!ac || strncmp(*av, "to", strlen(*av))) 2835 errx(EX_USAGE, "missing ``to''"); 2836 av++; ac--; 2837 2838 /* 2839 * destination, mandatory 2840 */ 2841 OR_START(dest_ip); 2842 NOT_BLOCK; /* optional "not" */ 2843 NEED1("missing dst address"); 2844 if (add_dstip(cmd, *av)) { 2845 ac--; av++; 2846 if (F_LEN(cmd) != 0) { /* ! any */ 2847 prev = cmd; 2848 cmd = next_cmd(cmd); 2849 } 2850 } 2851 OR_BLOCK(dest_ip); 2852 2853 /* 2854 * dest. ports, optional 2855 */ 2856 NOT_BLOCK; /* optional "not" */ 2857 if (ac) { 2858 if (!strncmp(*av, "any", strlen(*av)) || 2859 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2860 ac--; av++; 2861 if (F_LEN(cmd) != 0) 2862 cmd = next_cmd(cmd); 2863 } 2864 } 2865 2866 read_options: 2867 if (ac && first_cmd == cmd) { 2868 /* 2869 * nothing specified so far, store in the rule to ease 2870 * printout later. 2871 */ 2872 rule->usr_flags = IPFW_USR_F_NORULE; 2873 } 2874 prev = NULL; 2875 while (ac) { 2876 char *s; 2877 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2878 2879 s = *av; 2880 cmd32 = (ipfw_insn_u32 *)cmd; 2881 2882 if (*s == '!') { /* alternate syntax for NOT */ 2883 if (cmd->len & F_NOT) 2884 errx(EX_USAGE, "double \"not\" not allowed\n"); 2885 cmd->len = F_NOT; 2886 s++; 2887 } 2888 i = match_token(rule_options, s); 2889 ac--; av++; 2890 switch(i) { 2891 case TOK_NOT: 2892 if (cmd->len & F_NOT) 2893 errx(EX_USAGE, "double \"not\" not allowed\n"); 2894 cmd->len = F_NOT; 2895 break; 2896 2897 case TOK_OR: 2898 if (open_par == 0 || prev == NULL) 2899 errx(EX_USAGE, "invalid \"or\" block\n"); 2900 prev->len |= F_OR; 2901 break; 2902 2903 case TOK_STARTBRACE: 2904 if (open_par) 2905 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2906 open_par = 1; 2907 break; 2908 2909 case TOK_ENDBRACE: 2910 if (!open_par) 2911 errx(EX_USAGE, "+missing \")\"\n"); 2912 open_par = 0; 2913 prev = NULL; 2914 break; 2915 2916 case TOK_IN: 2917 fill_cmd(cmd, O_IN, 0, 0); 2918 break; 2919 2920 case TOK_OUT: 2921 cmd->len ^= F_NOT; /* toggle F_NOT */ 2922 fill_cmd(cmd, O_IN, 0, 0); 2923 break; 2924 2925 case TOK_FRAG: 2926 fill_cmd(cmd, O_FRAG, 0, 0); 2927 break; 2928 2929 case TOK_LAYER2: 2930 fill_cmd(cmd, O_LAYER2, 0, 0); 2931 break; 2932 2933 case TOK_XMIT: 2934 case TOK_RECV: 2935 case TOK_VIA: 2936 NEED1("recv, xmit, via require interface name" 2937 " or address"); 2938 fill_iface((ipfw_insn_if *)cmd, av[0]); 2939 ac--; av++; 2940 if (F_LEN(cmd) == 0) /* not a valid address */ 2941 break; 2942 if (i == TOK_XMIT) 2943 cmd->opcode = O_XMIT; 2944 else if (i == TOK_RECV) 2945 cmd->opcode = O_RECV; 2946 else if (i == TOK_VIA) 2947 cmd->opcode = O_VIA; 2948 break; 2949 2950 case TOK_ICMPTYPES: 2951 NEED1("icmptypes requires list of types"); 2952 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 2953 av++; ac--; 2954 break; 2955 2956 case TOK_IPTTL: 2957 NEED1("ipttl requires TTL"); 2958 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 2959 ac--; av++; 2960 break; 2961 2962 case TOK_IPID: 2963 NEED1("ipid requires length"); 2964 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 2965 ac--; av++; 2966 break; 2967 2968 case TOK_IPLEN: 2969 NEED1("iplen requires length"); 2970 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 2971 ac--; av++; 2972 break; 2973 2974 case TOK_IPVER: 2975 NEED1("ipver requires version"); 2976 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 2977 ac--; av++; 2978 break; 2979 2980 case TOK_IPPRECEDENCE: 2981 NEED1("ipprecedence requires value"); 2982 fill_cmd(cmd, O_IPPRECEDENCE, 0, 2983 (strtoul(*av, NULL, 0) & 7) << 5); 2984 ac--; av++; 2985 break; 2986 2987 case TOK_IPOPTS: 2988 NEED1("missing argument for ipoptions"); 2989 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 2990 ac--; av++; 2991 break; 2992 2993 case TOK_IPTOS: 2994 NEED1("missing argument for iptos"); 2995 fill_flags(cmd, O_IPTOS, f_iptos, *av); 2996 ac--; av++; 2997 break; 2998 2999 case TOK_UID: 3000 NEED1("uid requires argument"); 3001 { 3002 char *end; 3003 uid_t uid; 3004 struct passwd *pwd; 3005 3006 cmd->opcode = O_UID; 3007 uid = strtoul(*av, &end, 0); 3008 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3009 if (pwd == NULL) 3010 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3011 cmd32->d[0] = pwd->pw_uid; 3012 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3013 ac--; av++; 3014 } 3015 break; 3016 3017 case TOK_GID: 3018 NEED1("gid requires argument"); 3019 { 3020 char *end; 3021 gid_t gid; 3022 struct group *grp; 3023 3024 cmd->opcode = O_GID; 3025 gid = strtoul(*av, &end, 0); 3026 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3027 if (grp == NULL) 3028 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3029 cmd32->d[0] = grp->gr_gid; 3030 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3031 ac--; av++; 3032 } 3033 break; 3034 3035 case TOK_ESTAB: 3036 fill_cmd(cmd, O_ESTAB, 0, 0); 3037 break; 3038 3039 case TOK_SETUP: 3040 fill_cmd(cmd, O_TCPFLAGS, 0, 3041 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3042 break; 3043 3044 case TOK_TCPOPTS: 3045 NEED1("missing argument for tcpoptions"); 3046 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3047 ac--; av++; 3048 break; 3049 3050 case TOK_TCPSEQ: 3051 case TOK_TCPACK: 3052 NEED1("tcpseq/tcpack requires argument"); 3053 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3054 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3055 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3056 ac--; av++; 3057 break; 3058 3059 case TOK_TCPWIN: 3060 NEED1("tcpwin requires length"); 3061 fill_cmd(cmd, O_TCPWIN, 0, 3062 htons(strtoul(*av, NULL, 0))); 3063 ac--; av++; 3064 break; 3065 3066 case TOK_TCPFLAGS: 3067 NEED1("missing argument for tcpflags"); 3068 cmd->opcode = O_TCPFLAGS; 3069 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3070 ac--; av++; 3071 break; 3072 3073 case TOK_KEEPSTATE: 3074 if (open_par) 3075 errx(EX_USAGE, "keep-state cannot be part " 3076 "of an or block"); 3077 if (have_state) 3078 errx(EX_USAGE, "only one of keep-state " 3079 "and limit is allowed"); 3080 have_state = cmd; 3081 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3082 break; 3083 3084 case TOK_LIMIT: 3085 if (open_par) 3086 errx(EX_USAGE, "limit cannot be part " 3087 "of an or block"); 3088 if (have_state) 3089 errx(EX_USAGE, "only one of keep-state " 3090 "and limit is allowed"); 3091 NEED1("limit needs mask and # of connections"); 3092 have_state = cmd; 3093 { 3094 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3095 3096 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3097 cmd->opcode = O_LIMIT; 3098 c->limit_mask = 0; 3099 c->conn_limit = 0; 3100 for (; ac >1 ;) { 3101 int val; 3102 3103 val = match_token(limit_masks, *av); 3104 if (val <= 0) 3105 break; 3106 c->limit_mask |= val; 3107 ac--; av++; 3108 } 3109 c->conn_limit = atoi(*av); 3110 if (c->conn_limit == 0) 3111 errx(EX_USAGE, "limit: limit must be >0"); 3112 if (c->limit_mask == 0) 3113 errx(EX_USAGE, "missing limit mask"); 3114 ac--; av++; 3115 } 3116 break; 3117 3118 case TOK_PROTO: 3119 NEED1("missing protocol"); 3120 if (add_proto(cmd, *av)) { 3121 proto = cmd->arg1; 3122 ac--; av++; 3123 } else 3124 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3125 break; 3126 3127 case TOK_SRCIP: 3128 NEED1("missing source IP"); 3129 if (add_srcip(cmd, *av)) { 3130 ac--; av++; 3131 } 3132 break; 3133 3134 case TOK_DSTIP: 3135 NEED1("missing destination IP"); 3136 if (add_dstip(cmd, *av)) { 3137 ac--; av++; 3138 } 3139 break; 3140 3141 case TOK_SRCPORT: 3142 NEED1("missing source port"); 3143 if (!strncmp(*av, "any", strlen(*av)) || 3144 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3145 ac--; av++; 3146 } else 3147 errx(EX_DATAERR, "invalid source port %s", *av); 3148 break; 3149 3150 case TOK_DSTPORT: 3151 NEED1("missing destination port"); 3152 if (!strncmp(*av, "any", strlen(*av)) || 3153 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3154 ac--; av++; 3155 } else 3156 errx(EX_DATAERR, "invalid destination port %s", 3157 *av); 3158 break; 3159 3160 case TOK_MAC: 3161 if (ac < 2) 3162 errx(EX_USAGE, "MAC dst-mac src-mac"); 3163 if (add_mac(cmd, ac, av)) { 3164 ac -= 2; av += 2; 3165 } 3166 break; 3167 3168 case TOK_MACTYPE: 3169 NEED1("missing mac type"); 3170 if (!add_mactype(cmd, ac, *av)) 3171 errx(EX_DATAERR, "invalid mac type %s", *av); 3172 ac--; av++; 3173 break; 3174 3175 default: 3176 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3177 } 3178 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3179 prev = cmd; 3180 cmd = next_cmd(cmd); 3181 } 3182 } 3183 3184 done: 3185 /* 3186 * Now copy stuff into the rule. 3187 * If we have a keep-state option, the first instruction 3188 * must be a PROBE_STATE (which is generated here). 3189 * If we have a LOG option, it was stored as the first command, 3190 * and now must be moved to the top of the action part. 3191 */ 3192 dst = (ipfw_insn *)rule->cmd; 3193 3194 /* 3195 * First thing to write into the command stream is the match probability. 3196 */ 3197 if (match_prob != 1) { /* 1 means always match */ 3198 dst->opcode = O_PROB; 3199 dst->len = 2; 3200 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3201 dst += dst->len; 3202 } 3203 3204 /* 3205 * generate O_PROBE_STATE if necessary 3206 */ 3207 if (have_state && have_state->opcode != O_CHECK_STATE) { 3208 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3209 dst = next_cmd(dst); 3210 } 3211 /* 3212 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3213 */ 3214 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3215 i = F_LEN(src); 3216 3217 switch (src->opcode) { 3218 case O_LOG: 3219 case O_KEEP_STATE: 3220 case O_LIMIT: 3221 break; 3222 default: 3223 bcopy(src, dst, i * sizeof(u_int32_t)); 3224 dst += i; 3225 } 3226 } 3227 3228 /* 3229 * put back the have_state command as last opcode 3230 */ 3231 if (have_state && have_state->opcode != O_CHECK_STATE) { 3232 i = F_LEN(have_state); 3233 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3234 dst += i; 3235 } 3236 /* 3237 * start action section 3238 */ 3239 rule->act_ofs = dst - rule->cmd; 3240 3241 /* 3242 * put back O_LOG if necessary 3243 */ 3244 src = (ipfw_insn *)cmdbuf; 3245 if ( src->opcode == O_LOG ) { 3246 i = F_LEN(src); 3247 bcopy(src, dst, i * sizeof(u_int32_t)); 3248 dst += i; 3249 } 3250 /* 3251 * copy all other actions 3252 */ 3253 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3254 i = F_LEN(src); 3255 bcopy(src, dst, i * sizeof(u_int32_t)); 3256 dst += i; 3257 } 3258 3259 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3260 i = (void *)dst - (void *)rule; 3261 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3262 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3263 if (!do_quiet) 3264 show_ipfw(rule, 10, 10); 3265 } 3266 3267 static void 3268 zero(int ac, char *av[]) 3269 { 3270 int rulenum; 3271 int failed = EX_OK; 3272 3273 av++; ac--; 3274 3275 if (!ac) { 3276 /* clear all entries */ 3277 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3278 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3279 if (!do_quiet) 3280 printf("Accounting cleared.\n"); 3281 3282 return; 3283 } 3284 3285 while (ac) { 3286 /* Rule number */ 3287 if (isdigit(**av)) { 3288 rulenum = atoi(*av); 3289 av++; 3290 ac--; 3291 if (setsockopt(s, IPPROTO_IP, 3292 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3293 warn("rule %u: setsockopt(IP_FW_ZERO)", 3294 rulenum); 3295 failed = EX_UNAVAILABLE; 3296 } else if (!do_quiet) 3297 printf("Entry %d cleared\n", rulenum); 3298 } else { 3299 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3300 } 3301 } 3302 if (failed != EX_OK) 3303 exit(failed); 3304 } 3305 3306 static void 3307 resetlog(int ac, char *av[]) 3308 { 3309 int rulenum; 3310 int failed = EX_OK; 3311 3312 av++; ac--; 3313 3314 if (!ac) { 3315 /* clear all entries */ 3316 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3317 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3318 if (!do_quiet) 3319 printf("Logging counts reset.\n"); 3320 3321 return; 3322 } 3323 3324 while (ac) { 3325 /* Rule number */ 3326 if (isdigit(**av)) { 3327 rulenum = atoi(*av); 3328 av++; 3329 ac--; 3330 if (setsockopt(s, IPPROTO_IP, 3331 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3332 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3333 rulenum); 3334 failed = EX_UNAVAILABLE; 3335 } else if (!do_quiet) 3336 printf("Entry %d logging count reset\n", 3337 rulenum); 3338 } else { 3339 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3340 } 3341 } 3342 if (failed != EX_OK) 3343 exit(failed); 3344 } 3345 3346 static void 3347 flush(void) 3348 { 3349 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3350 3351 if (!do_force && !do_quiet) { /* need to ask user */ 3352 int c; 3353 3354 printf("Are you sure? [yn] "); 3355 fflush(stdout); 3356 do { 3357 c = toupper(getc(stdin)); 3358 while (c != '\n' && getc(stdin) != '\n') 3359 if (feof(stdin)) 3360 return; /* and do not flush */ 3361 } while (c != 'Y' && c != 'N'); 3362 printf("\n"); 3363 if (c == 'N') /* user said no */ 3364 return; 3365 } 3366 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3367 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3368 do_pipe ? "DUMMYNET" : "FW"); 3369 if (!do_quiet) 3370 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3371 } 3372 3373 static int 3374 ipfw_main(int ac, char **av) 3375 { 3376 int ch; 3377 3378 if (ac == 1) 3379 show_usage(); 3380 3381 /* Set the force flag for non-interactive processes */ 3382 do_force = !isatty(STDIN_FILENO); 3383 3384 optind = optreset = 1; 3385 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3386 switch (ch) { 3387 case 'h': /* help */ 3388 help(); 3389 break; /* NOTREACHED */ 3390 3391 case 's': /* sort */ 3392 do_sort = atoi(optarg); 3393 break; 3394 case 'a': 3395 do_acct = 1; 3396 break; 3397 case 'c': 3398 do_compact = 1; 3399 break; 3400 case 'd': 3401 do_dynamic = 1; 3402 break; 3403 case 'e': 3404 do_expired = 1; 3405 break; 3406 case 'f': 3407 do_force = 1; 3408 break; 3409 case 'N': 3410 do_resolv = 1; 3411 break; 3412 case 'q': 3413 do_quiet = 1; 3414 break; 3415 case 'S': 3416 show_sets = 1; 3417 break; 3418 case 't': 3419 do_time = 1; 3420 break; 3421 case 'v': /* verbose */ 3422 verbose++; 3423 break; 3424 default: 3425 show_usage(); 3426 } 3427 3428 ac -= optind; 3429 av += optind; 3430 NEED1("bad arguments, for usage summary ``ipfw''"); 3431 3432 /* 3433 * optional: pipe or queue 3434 */ 3435 if (!strncmp(*av, "pipe", strlen(*av))) { 3436 do_pipe = 1; 3437 ac--; 3438 av++; 3439 } else if (!strncmp(*av, "queue", strlen(*av))) { 3440 do_pipe = 2; 3441 ac--; 3442 av++; 3443 } 3444 NEED1("missing command"); 3445 3446 /* 3447 * for pipes and queues we normally say 'pipe NN config' 3448 * but the code is easier to parse as 'pipe config NN' 3449 * so we swap the two arguments. 3450 */ 3451 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3452 char *p = av[0]; 3453 av[0] = av[1]; 3454 av[1] = p; 3455 } 3456 if (!strncmp(*av, "add", strlen(*av))) 3457 add(ac, av); 3458 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3459 config_pipe(ac, av); 3460 else if (!strncmp(*av, "delete", strlen(*av))) 3461 delete(ac, av); 3462 else if (!strncmp(*av, "flush", strlen(*av))) 3463 flush(); 3464 else if (!strncmp(*av, "zero", strlen(*av))) 3465 zero(ac, av); 3466 else if (!strncmp(*av, "resetlog", strlen(*av))) 3467 resetlog(ac, av); 3468 else if (!strncmp(*av, "print", strlen(*av)) || 3469 !strncmp(*av, "list", strlen(*av))) 3470 list(ac, av); 3471 else if (!strncmp(*av, "enable", strlen(*av))) 3472 sysctl_handler(ac, av, 1); 3473 else if (!strncmp(*av, "disable", strlen(*av))) 3474 sysctl_handler(ac, av, 0); 3475 else if (!strncmp(*av, "set", strlen(*av))) 3476 sets_handler(ac, av); 3477 else if (!strncmp(*av, "show", strlen(*av))) { 3478 do_acct++; 3479 list(ac, av); 3480 } else 3481 errx(EX_USAGE, "bad command `%s'", *av); 3482 return 0; 3483 } 3484 3485 3486 static void 3487 ipfw_readfile(int ac, char *av[]) 3488 { 3489 #define MAX_ARGS 32 3490 #define WHITESP " \t\f\v\n\r" 3491 char buf[BUFSIZ]; 3492 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3493 char linename[10]; 3494 int i=0, lineno=0, qflag=0, pflag=0, status; 3495 FILE *f = NULL; 3496 pid_t preproc = 0; 3497 int c; 3498 3499 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 3500 switch(c) { 3501 case 'D': 3502 if (!pflag) 3503 errx(EX_USAGE, "-D requires -p"); 3504 if (i > MAX_ARGS - 2) 3505 errx(EX_USAGE, 3506 "too many -D or -U options"); 3507 args[i++] = "-D"; 3508 args[i++] = optarg; 3509 break; 3510 3511 case 'U': 3512 if (!pflag) 3513 errx(EX_USAGE, "-U requires -p"); 3514 if (i > MAX_ARGS - 2) 3515 errx(EX_USAGE, 3516 "too many -D or -U options"); 3517 args[i++] = "-U"; 3518 args[i++] = optarg; 3519 break; 3520 3521 case 'p': 3522 pflag = 1; 3523 cmd = optarg; 3524 args[0] = cmd; 3525 i = 1; 3526 break; 3527 3528 case 'q': 3529 qflag = 1; 3530 break; 3531 3532 default: 3533 errx(EX_USAGE, "bad arguments, for usage" 3534 " summary ``ipfw''"); 3535 } 3536 3537 av += optind; 3538 ac -= optind; 3539 if (ac != 1) 3540 errx(EX_USAGE, "extraneous filename arguments"); 3541 3542 if ((f = fopen(av[0], "r")) == NULL) 3543 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3544 3545 if (pflag) { 3546 /* pipe through preprocessor (cpp or m4) */ 3547 int pipedes[2]; 3548 3549 args[i] = NULL; 3550 3551 if (pipe(pipedes) == -1) 3552 err(EX_OSERR, "cannot create pipe"); 3553 3554 switch((preproc = fork())) { 3555 case -1: 3556 err(EX_OSERR, "cannot fork"); 3557 3558 case 0: 3559 /* child */ 3560 if (dup2(fileno(f), 0) == -1 3561 || dup2(pipedes[1], 1) == -1) 3562 err(EX_OSERR, "dup2()"); 3563 fclose(f); 3564 close(pipedes[1]); 3565 close(pipedes[0]); 3566 execvp(cmd, args); 3567 err(EX_OSERR, "execvp(%s) failed", cmd); 3568 3569 default: 3570 /* parent */ 3571 fclose(f); 3572 close(pipedes[1]); 3573 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3574 int savederrno = errno; 3575 3576 kill(preproc, SIGTERM); 3577 errno = savederrno; 3578 err(EX_OSERR, "fdopen()"); 3579 } 3580 } 3581 } 3582 3583 while (fgets(buf, BUFSIZ, f)) { 3584 lineno++; 3585 sprintf(linename, "Line %d", lineno); 3586 args[0] = linename; 3587 3588 if (*buf == '#') 3589 continue; 3590 if ((p = strchr(buf, '#')) != NULL) 3591 *p = '\0'; 3592 i = 1; 3593 if (qflag) 3594 args[i++] = "-q"; 3595 for (a = strtok(buf, WHITESP); 3596 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3597 args[i] = a; 3598 if (i == (qflag? 2: 1)) 3599 continue; 3600 if (i == MAX_ARGS) 3601 errx(EX_USAGE, "%s: too many arguments", 3602 linename); 3603 args[i] = NULL; 3604 3605 ipfw_main(i, args); 3606 } 3607 fclose(f); 3608 if (pflag) { 3609 if (waitpid(preproc, &status, 0) == -1) 3610 errx(EX_OSERR, "waitpid()"); 3611 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3612 errx(EX_UNAVAILABLE, 3613 "preprocessor exited with status %d", 3614 WEXITSTATUS(status)); 3615 else if (WIFSIGNALED(status)) 3616 errx(EX_UNAVAILABLE, 3617 "preprocessor exited with signal %d", 3618 WTERMSIG(status)); 3619 } 3620 } 3621 3622 int 3623 main(int ac, char *av[]) 3624 { 3625 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3626 if (s < 0) 3627 err(EX_UNAVAILABLE, "socket"); 3628 3629 /* 3630 * If the last argument is an absolute pathname, interpret it 3631 * as a file to be preprocessed. 3632 */ 3633 3634 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3635 ipfw_readfile(ac, av); 3636 else 3637 ipfw_main(ac, av); 3638 return EX_OK; 3639 } 3640