1 /* 2 * Copyright (c) 2002 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $ 21 * $DragonFly: src/sbin/ipfw/ipfw2.c,v 1.11 2007/11/03 13:14:29 sephe Exp $ 22 */ 23 24 #include <sys/param.h> 25 #include <sys/mbuf.h> 26 #include <sys/socket.h> 27 #include <sys/sockio.h> 28 #include <sys/sysctl.h> 29 #include <sys/time.h> 30 #include <sys/wait.h> 31 32 #include <ctype.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <grp.h> 36 #include <limits.h> 37 #include <netdb.h> 38 #include <pwd.h> 39 #include <signal.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <unistd.h> 45 #include <sysexits.h> 46 47 #include <net/if.h> 48 #include <netinet/in.h> 49 #include <netinet/in_systm.h> 50 #include <netinet/ip.h> 51 #include <netinet/ip_icmp.h> 52 #include <net/ipfw/ip_fw.h> 53 #include <net/route.h> /* def. of struct route */ 54 #include <net/ethernet.h> 55 #include <net/dummynet/ip_dummynet.h> 56 #include <netinet/tcp.h> 57 #include <arpa/inet.h> 58 59 int s, /* main RAW socket */ 60 do_resolv, /* Would try to resolve all */ 61 do_acct, /* Show packet/byte count */ 62 do_time, /* Show time stamps */ 63 do_quiet, /* Be quiet in add and flush */ 64 do_force, /* Don't ask for confirmation */ 65 do_pipe, /* this cmd refers to a pipe */ 66 do_sort, /* field to sort results (0 = no) */ 67 do_dynamic, /* display dynamic rules */ 68 do_expired, /* display expired dynamic rules */ 69 do_compact, /* show rules in compact mode */ 70 show_sets, /* display rule sets */ 71 verbose; 72 73 #define IP_MASK_ALL 0xffffffff 74 75 /* 76 * structure to hold flag names and associated values to be 77 * set in the appropriate masks. 78 * A NULL string terminates the array. 79 * Often, an element with 0 value contains an error string. 80 * 81 */ 82 struct _s_x { 83 char *s; 84 int x; 85 }; 86 87 static struct _s_x f_tcpflags[] = { 88 { "syn", TH_SYN }, 89 { "fin", TH_FIN }, 90 { "ack", TH_ACK }, 91 { "psh", TH_PUSH }, 92 { "rst", TH_RST }, 93 { "urg", TH_URG }, 94 { "tcp flag", 0 }, 95 { NULL, 0 } 96 }; 97 98 static struct _s_x f_tcpopts[] = { 99 { "mss", IP_FW_TCPOPT_MSS }, 100 { "maxseg", IP_FW_TCPOPT_MSS }, 101 { "window", IP_FW_TCPOPT_WINDOW }, 102 { "sack", IP_FW_TCPOPT_SACK }, 103 { "ts", IP_FW_TCPOPT_TS }, 104 { "timestamp", IP_FW_TCPOPT_TS }, 105 { "cc", IP_FW_TCPOPT_CC }, 106 { "tcp option", 0 }, 107 { NULL, 0 } 108 }; 109 110 /* 111 * IP options span the range 0 to 255 so we need to remap them 112 * (though in fact only the low 5 bits are significant). 113 */ 114 static struct _s_x f_ipopts[] = { 115 { "ssrr", IP_FW_IPOPT_SSRR}, 116 { "lsrr", IP_FW_IPOPT_LSRR}, 117 { "rr", IP_FW_IPOPT_RR}, 118 { "ts", IP_FW_IPOPT_TS}, 119 { "ip option", 0 }, 120 { NULL, 0 } 121 }; 122 123 static struct _s_x f_iptos[] = { 124 { "lowdelay", IPTOS_LOWDELAY}, 125 { "throughput", IPTOS_THROUGHPUT}, 126 { "reliability", IPTOS_RELIABILITY}, 127 { "mincost", IPTOS_MINCOST}, 128 { "congestion", IPTOS_CE}, 129 { "ecntransport", IPTOS_ECT}, 130 { "ip tos option", 0}, 131 { NULL, 0 } 132 }; 133 134 static struct _s_x limit_masks[] = { 135 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 136 {"src-addr", DYN_SRC_ADDR}, 137 {"src-port", DYN_SRC_PORT}, 138 {"dst-addr", DYN_DST_ADDR}, 139 {"dst-port", DYN_DST_PORT}, 140 {NULL, 0} 141 }; 142 143 /* 144 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 145 * This is only used in this code. 146 */ 147 #define IPPROTO_ETHERTYPE 0x1000 148 static struct _s_x ether_types[] = { 149 /* 150 * Note, we cannot use "-:&/" in the names because they are field 151 * separators in the type specifications. Also, we use s = NULL as 152 * end-delimiter, because a type of 0 can be legal. 153 */ 154 { "ip", 0x0800 }, 155 { "ipv4", 0x0800 }, 156 { "ipv6", 0x86dd }, 157 { "arp", 0x0806 }, 158 { "rarp", 0x8035 }, 159 { "vlan", 0x8100 }, 160 { "loop", 0x9000 }, 161 { "trail", 0x1000 }, 162 { "at", 0x809b }, 163 { "atalk", 0x809b }, 164 { "aarp", 0x80f3 }, 165 { "pppoe_disc", 0x8863 }, 166 { "pppoe_sess", 0x8864 }, 167 { "ipx_8022", 0x00E0 }, 168 { "ipx_8023", 0x0000 }, 169 { "ipx_ii", 0x8137 }, 170 { "ipx_snap", 0x8137 }, 171 { "ipx", 0x8137 }, 172 { "ns", 0x0600 }, 173 { NULL, 0 } 174 }; 175 176 static void show_usage(void); 177 178 enum tokens { 179 TOK_NULL=0, 180 181 TOK_OR, 182 TOK_NOT, 183 TOK_STARTBRACE, 184 TOK_ENDBRACE, 185 186 TOK_ACCEPT, 187 TOK_COUNT, 188 TOK_PIPE, 189 TOK_QUEUE, 190 TOK_DIVERT, 191 TOK_TEE, 192 TOK_FORWARD, 193 TOK_SKIPTO, 194 TOK_DENY, 195 TOK_REJECT, 196 TOK_RESET, 197 TOK_UNREACH, 198 TOK_CHECKSTATE, 199 200 TOK_UID, 201 TOK_GID, 202 TOK_IN, 203 TOK_LIMIT, 204 TOK_KEEPSTATE, 205 TOK_LAYER2, 206 TOK_OUT, 207 TOK_XMIT, 208 TOK_RECV, 209 TOK_VIA, 210 TOK_FRAG, 211 TOK_IPOPTS, 212 TOK_IPLEN, 213 TOK_IPID, 214 TOK_IPPRECEDENCE, 215 TOK_IPTOS, 216 TOK_IPTTL, 217 TOK_IPVER, 218 TOK_ESTAB, 219 TOK_SETUP, 220 TOK_TCPFLAGS, 221 TOK_TCPOPTS, 222 TOK_TCPSEQ, 223 TOK_TCPACK, 224 TOK_TCPWIN, 225 TOK_ICMPTYPES, 226 TOK_MAC, 227 TOK_MACTYPE, 228 229 TOK_PLR, 230 TOK_NOERROR, 231 TOK_BUCKETS, 232 TOK_DSTIP, 233 TOK_SRCIP, 234 TOK_DSTPORT, 235 TOK_SRCPORT, 236 TOK_ALL, 237 TOK_MASK, 238 TOK_BW, 239 TOK_DELAY, 240 TOK_RED, 241 TOK_GRED, 242 TOK_DROPTAIL, 243 TOK_PROTO, 244 TOK_WEIGHT, 245 }; 246 247 struct _s_x dummynet_params[] = { 248 { "plr", TOK_PLR }, 249 { "noerror", TOK_NOERROR }, 250 { "buckets", TOK_BUCKETS }, 251 { "dst-ip", TOK_DSTIP }, 252 { "src-ip", TOK_SRCIP }, 253 { "dst-port", TOK_DSTPORT }, 254 { "src-port", TOK_SRCPORT }, 255 { "proto", TOK_PROTO }, 256 { "weight", TOK_WEIGHT }, 257 { "all", TOK_ALL }, 258 { "mask", TOK_MASK }, 259 { "droptail", TOK_DROPTAIL }, 260 { "red", TOK_RED }, 261 { "gred", TOK_GRED }, 262 { "bw", TOK_BW }, 263 { "bandwidth", TOK_BW }, 264 { "delay", TOK_DELAY }, 265 { "pipe", TOK_PIPE }, 266 { "queue", TOK_QUEUE }, 267 { "dummynet-params", TOK_NULL }, 268 { NULL, 0 } 269 }; 270 271 struct _s_x rule_actions[] = { 272 { "accept", TOK_ACCEPT }, 273 { "pass", TOK_ACCEPT }, 274 { "allow", TOK_ACCEPT }, 275 { "permit", TOK_ACCEPT }, 276 { "count", TOK_COUNT }, 277 { "pipe", TOK_PIPE }, 278 { "queue", TOK_QUEUE }, 279 { "divert", TOK_DIVERT }, 280 { "tee", TOK_TEE }, 281 { "fwd", TOK_FORWARD }, 282 { "forward", TOK_FORWARD }, 283 { "skipto", TOK_SKIPTO }, 284 { "deny", TOK_DENY }, 285 { "drop", TOK_DENY }, 286 { "reject", TOK_REJECT }, 287 { "reset", TOK_RESET }, 288 { "unreach", TOK_UNREACH }, 289 { "check-state", TOK_CHECKSTATE }, 290 { NULL, TOK_NULL }, 291 { NULL, 0 } 292 }; 293 294 struct _s_x rule_options[] = { 295 { "uid", TOK_UID }, 296 { "gid", TOK_GID }, 297 { "in", TOK_IN }, 298 { "limit", TOK_LIMIT }, 299 { "keep-state", TOK_KEEPSTATE }, 300 { "layer2", TOK_LAYER2 }, 301 { "out", TOK_OUT }, 302 { "xmit", TOK_XMIT }, 303 { "recv", TOK_RECV }, 304 { "via", TOK_VIA }, 305 { "fragment", TOK_FRAG }, 306 { "frag", TOK_FRAG }, 307 { "ipoptions", TOK_IPOPTS }, 308 { "ipopts", TOK_IPOPTS }, 309 { "iplen", TOK_IPLEN }, 310 { "ipid", TOK_IPID }, 311 { "ipprecedence", TOK_IPPRECEDENCE }, 312 { "iptos", TOK_IPTOS }, 313 { "ipttl", TOK_IPTTL }, 314 { "ipversion", TOK_IPVER }, 315 { "ipver", TOK_IPVER }, 316 { "estab", TOK_ESTAB }, 317 { "established", TOK_ESTAB }, 318 { "setup", TOK_SETUP }, 319 { "tcpflags", TOK_TCPFLAGS }, 320 { "tcpflgs", TOK_TCPFLAGS }, 321 { "tcpoptions", TOK_TCPOPTS }, 322 { "tcpopts", TOK_TCPOPTS }, 323 { "tcpseq", TOK_TCPSEQ }, 324 { "tcpack", TOK_TCPACK }, 325 { "tcpwin", TOK_TCPWIN }, 326 { "icmptype", TOK_ICMPTYPES }, 327 { "icmptypes", TOK_ICMPTYPES }, 328 { "dst-ip", TOK_DSTIP }, 329 { "src-ip", TOK_SRCIP }, 330 { "dst-port", TOK_DSTPORT }, 331 { "src-port", TOK_SRCPORT }, 332 { "proto", TOK_PROTO }, 333 { "MAC", TOK_MAC }, 334 { "mac", TOK_MAC }, 335 { "mac-type", TOK_MACTYPE }, 336 337 { "not", TOK_NOT }, /* pseudo option */ 338 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 339 { "or", TOK_OR }, /* pseudo option */ 340 { "|", /* escape */ TOK_OR }, /* pseudo option */ 341 { "{", TOK_STARTBRACE }, /* pseudo option */ 342 { "(", TOK_STARTBRACE }, /* pseudo option */ 343 { "}", TOK_ENDBRACE }, /* pseudo option */ 344 { ")", TOK_ENDBRACE }, /* pseudo option */ 345 { NULL, TOK_NULL }, 346 { NULL, 0 } 347 }; 348 349 /** 350 * match_token takes a table and a string, returns the value associated 351 * with the string (0 meaning an error in most cases) 352 */ 353 static int 354 match_token(struct _s_x *table, char *string) 355 { 356 struct _s_x *pt; 357 int i = strlen(string); 358 359 for (pt = table ; i && pt->s != NULL ; pt++) 360 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 361 return pt->x; 362 return -1; 363 }; 364 365 static char * 366 match_value(struct _s_x *p, u_int32_t value) 367 { 368 for (; p->s != NULL; p++) 369 if (p->x == value) 370 return p->s; 371 return NULL; 372 } 373 374 /* 375 * prints one port, symbolic or numeric 376 */ 377 static void 378 print_port(int proto, u_int16_t port) 379 { 380 381 if (proto == IPPROTO_ETHERTYPE) { 382 char *s; 383 384 if (do_resolv && (s = match_value(ether_types, port)) ) 385 printf("%s", s); 386 else 387 printf("0x%04x", port); 388 } else { 389 struct servent *se = NULL; 390 if (do_resolv) { 391 struct protoent *pe = getprotobynumber(proto); 392 393 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 394 } 395 if (se) 396 printf("%s", se->s_name); 397 else 398 printf("%d", port); 399 } 400 } 401 402 /* 403 * print the values in a list of ports 404 * XXX todo: add support for mask. 405 */ 406 static void 407 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 408 { 409 u_int16_t *p = cmd->ports; 410 int i; 411 char *sep= " "; 412 413 if (cmd->o.len & F_NOT) 414 printf(" not"); 415 if (opcode != 0) 416 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 417 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 418 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 419 printf(sep); 420 print_port(proto, p[0]); 421 if (p[0] != p[1]) { 422 printf("-"); 423 print_port(proto, p[1]); 424 } 425 sep = ","; 426 } 427 } 428 429 /* 430 * Like strtol, but also translates service names into port numbers 431 * for some protocols. 432 * In particular: 433 * proto == -1 disables the protocol check; 434 * proto == IPPROTO_ETHERTYPE looks up an internal table 435 * proto == <some value in /etc/protocols> matches the values there. 436 * Returns *end == s in case the parameter is not found. 437 */ 438 static int 439 strtoport(char *s, char **end, int base, int proto) 440 { 441 char *p, *buf; 442 char *s1; 443 int i; 444 445 *end = s; /* default - not found */ 446 if ( *s == '\0') 447 return 0; /* not found */ 448 449 if (isdigit(*s)) 450 return strtol(s, end, base); 451 452 /* 453 * find separator. '\\' escapes the next char. 454 */ 455 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 456 if (*s1 == '\\' && s1[1] != '\0') 457 s1++; 458 459 buf = malloc(s1 - s + 1); 460 if (buf == NULL) 461 return 0; 462 463 /* 464 * copy into a buffer skipping backslashes 465 */ 466 for (p = s, i = 0; p != s1 ; p++) 467 if ( *p != '\\') 468 buf[i++] = *p; 469 buf[i++] = '\0'; 470 471 if (proto == IPPROTO_ETHERTYPE) { 472 i = match_token(ether_types, buf); 473 free(buf); 474 if (i != -1) { /* found */ 475 *end = s1; 476 return i; 477 } 478 } else { 479 struct protoent *pe = NULL; 480 struct servent *se; 481 482 if (proto != 0) 483 pe = getprotobynumber(proto); 484 setservent(1); 485 se = getservbyname(buf, pe ? pe->p_name : NULL); 486 free(buf); 487 if (se != NULL) { 488 *end = s1; 489 return ntohs(se->s_port); 490 } 491 } 492 return 0; /* not found */ 493 } 494 495 /* 496 * fill the body of the command with the list of port ranges. 497 * At the moment it only understands numeric ranges. 498 */ 499 static int 500 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 501 { 502 u_int16_t *p = cmd->ports; 503 int i = 0; 504 char *s = av; 505 506 while (*s) { 507 u_int16_t a, b; 508 509 a = strtoport(av, &s, 0, proto); 510 if (s == av) /* no parameter */ 511 break; 512 if (*s == '-') { /* a range */ 513 av = s+1; 514 b = strtoport(av, &s, 0, proto); 515 if (s == av) /* no parameter */ 516 break; 517 p[0] = a; 518 p[1] = b; 519 } else if (*s == ',' || *s == '\0' ) { 520 p[0] = p[1] = a; 521 } else { /* invalid separator */ 522 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 523 *s, av); 524 } 525 i++; 526 p += 2; 527 av = s+1; 528 } 529 if (i > 0) { 530 if (i+1 > F_LEN_MASK) 531 errx(EX_DATAERR, "too many ports/ranges\n"); 532 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 533 } 534 return i; 535 } 536 537 static struct _s_x icmpcodes[] = { 538 { "net", ICMP_UNREACH_NET }, 539 { "host", ICMP_UNREACH_HOST }, 540 { "protocol", ICMP_UNREACH_PROTOCOL }, 541 { "port", ICMP_UNREACH_PORT }, 542 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 543 { "srcfail", ICMP_UNREACH_SRCFAIL }, 544 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 545 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 546 { "isolated", ICMP_UNREACH_ISOLATED }, 547 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 548 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 549 { "tosnet", ICMP_UNREACH_TOSNET }, 550 { "toshost", ICMP_UNREACH_TOSHOST }, 551 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 552 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 553 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 554 { NULL, 0 } 555 }; 556 557 static void 558 fill_reject_code(u_short *codep, char *str) 559 { 560 int val; 561 char *s; 562 563 val = strtoul(str, &s, 0); 564 if (s == str || *s != '\0' || val >= 0x100) 565 val = match_token(icmpcodes, str); 566 if (val < 0) 567 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 568 *codep = val; 569 return; 570 } 571 572 static void 573 print_reject_code(u_int16_t code) 574 { 575 char *s = match_value(icmpcodes, code); 576 577 if (s != NULL) 578 printf("unreach %s", s); 579 else 580 printf("unreach %u", code); 581 } 582 583 /* 584 * Returns the number of bits set (from left) in a contiguous bitmask, 585 * or -1 if the mask is not contiguous. 586 * XXX this needs a proper fix. 587 * This effectively works on masks in big-endian (network) format. 588 * when compiled on little endian architectures. 589 * 590 * First bit is bit 7 of the first byte -- note, for MAC addresses, 591 * the first bit on the wire is bit 0 of the first byte. 592 * len is the max length in bits. 593 */ 594 static int 595 contigmask(u_char *p, int len) 596 { 597 int i, n; 598 for (i=0; i<len ; i++) 599 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 600 break; 601 for (n=i+1; n < len; n++) 602 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 603 return -1; /* mask not contiguous */ 604 return i; 605 } 606 607 /* 608 * print flags set/clear in the two bitmasks passed as parameters. 609 * There is a specialized check for f_tcpflags. 610 */ 611 static void 612 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 613 { 614 char *comma=""; 615 int i; 616 u_char set = cmd->arg1 & 0xff; 617 u_char clear = (cmd->arg1 >> 8) & 0xff; 618 619 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 620 printf(" setup"); 621 return; 622 } 623 624 printf(" %s ", name); 625 for (i=0; list[i].x != 0; i++) { 626 if (set & list[i].x) { 627 set &= ~list[i].x; 628 printf("%s%s", comma, list[i].s); 629 comma = ","; 630 } 631 if (clear & list[i].x) { 632 clear &= ~list[i].x; 633 printf("%s!%s", comma, list[i].s); 634 comma = ","; 635 } 636 } 637 } 638 639 /* 640 * Print the ip address contained in a command. 641 */ 642 static void 643 print_ip(ipfw_insn_ip *cmd, char *s) 644 { 645 struct hostent *he = NULL; 646 int mb; 647 648 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 649 650 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 651 printf("me"); 652 return; 653 } 654 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 655 u_int32_t x, *d; 656 int i; 657 char comma = '{'; 658 659 x = cmd->o.arg1 - 1; 660 x = htonl( ~x ); 661 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 662 printf("%s/%d", inet_ntoa(cmd->addr), 663 contigmask((u_char *)&x, 32)); 664 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 665 x &= 0xff; /* base */ 666 d = (u_int32_t *)&(cmd->mask); 667 for (i=0; i < cmd->o.arg1; i++) 668 if (d[ i/32] & (1<<(i & 31))) { 669 printf("%c%d", comma, i+x); 670 comma = ','; 671 } 672 printf("}"); 673 return; 674 } 675 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 676 mb = 32; 677 else 678 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 679 if (mb == 32 && do_resolv) 680 he = gethostbyaddr((char *)&(cmd->addr.s_addr), 681 sizeof(u_long), AF_INET); 682 if (he != NULL) /* resolved to name */ 683 printf("%s", he->h_name); 684 else if (mb == 0) /* any */ 685 printf("any"); 686 else { /* numeric IP followed by some kind of mask */ 687 printf("%s", inet_ntoa(cmd->addr)); 688 if (mb < 0) 689 printf(":%s", inet_ntoa(cmd->mask)); 690 else if (mb < 32) 691 printf("/%d", mb); 692 } 693 } 694 695 /* 696 * prints a MAC address/mask pair 697 */ 698 static void 699 print_mac(u_char *addr, u_char *mask) 700 { 701 int l = contigmask(mask, 48); 702 703 if (l == 0) 704 printf(" any"); 705 else { 706 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 707 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 708 if (l == -1) 709 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 710 mask[0], mask[1], mask[2], 711 mask[3], mask[4], mask[5]); 712 else if (l < 48) 713 printf("/%d", l); 714 } 715 } 716 717 static void 718 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 719 { 720 u_int8_t type; 721 722 cmd->d[0] = 0; 723 while (*av) { 724 if (*av == ',') 725 av++; 726 727 type = strtoul(av, &av, 0); 728 729 if (*av != ',' && *av != '\0') 730 errx(EX_DATAERR, "invalid ICMP type"); 731 732 if (type > 31) 733 errx(EX_DATAERR, "ICMP type out of range"); 734 735 cmd->d[0] |= 1 << type; 736 } 737 cmd->o.opcode = O_ICMPTYPE; 738 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 739 } 740 741 static void 742 print_icmptypes(ipfw_insn_u32 *cmd) 743 { 744 int i; 745 char sep= ' '; 746 747 printf(" icmptypes"); 748 for (i = 0; i < 32; i++) { 749 if ( (cmd->d[0] & (1 << (i))) == 0) 750 continue; 751 printf("%c%d", sep, i); 752 sep = ','; 753 } 754 } 755 756 /* 757 * show_ipfw() prints the body of an ipfw rule. 758 * Because the standard rule has at least proto src_ip dst_ip, we use 759 * a helper function to produce these entries if not provided explicitly. 760 * The first argument is the list of fields we have, the second is 761 * the list of fields we want to be printed. 762 * 763 * Special cases if we have provided a MAC header: 764 * + if the rule does not contain IP addresses/ports, do not print them; 765 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 766 * 767 * Once we have 'have_options', IP header fields are printed as options. 768 */ 769 #define HAVE_PROTO 0x0001 770 #define HAVE_SRCIP 0x0002 771 #define HAVE_DSTIP 0x0004 772 #define HAVE_MAC 0x0008 773 #define HAVE_MACTYPE 0x0010 774 #define HAVE_OPTIONS 0x8000 775 776 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 777 static void 778 show_prerequisites(int *flags, int want, int cmd) 779 { 780 if ( (*flags & HAVE_IP) == HAVE_IP) 781 *flags |= HAVE_OPTIONS; 782 783 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 784 cmd != O_MAC_TYPE) { 785 /* 786 * mac-type was optimized out by the compiler, 787 * restore it 788 */ 789 printf(" any"); 790 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 791 return; 792 } 793 if ( !(*flags & HAVE_OPTIONS)) { 794 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 795 printf(" ip"); 796 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 797 printf(" from any"); 798 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 799 printf(" to any"); 800 } 801 *flags |= want; 802 } 803 804 static void 805 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 806 { 807 static int twidth = 0; 808 int l; 809 ipfw_insn *cmd; 810 int proto = 0; /* default */ 811 int flags = 0; /* prerequisites */ 812 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 813 int or_block = 0; /* we are in an or block */ 814 815 u_int32_t set_disable = (u_int32_t)(rule->next_rule); 816 817 if (set_disable & (1 << rule->set)) { /* disabled */ 818 if (!show_sets) 819 return; 820 else 821 printf("# DISABLED "); 822 } 823 printf("%05u ", rule->rulenum); 824 825 if (do_acct) 826 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth, 827 rule->bcnt); 828 829 if (do_time) { 830 char timestr[30]; 831 832 if (twidth == 0) { 833 strcpy(timestr, ctime((time_t *)&twidth)); 834 *strchr(timestr, '\n') = '\0'; 835 twidth = strlen(timestr); 836 } 837 if (rule->timestamp) { 838 #if _FreeBSD_version < 500000 /* XXX check */ 839 #define _long_to_time(x) (time_t)(x) 840 #endif 841 time_t t = _long_to_time(rule->timestamp); 842 843 strcpy(timestr, ctime(&t)); 844 *strchr(timestr, '\n') = '\0'; 845 printf("%s ", timestr); 846 } else { 847 printf("%*s ", twidth, " "); 848 } 849 } 850 851 if (show_sets) 852 printf("set %d ", rule->set); 853 854 /* 855 * print the optional "match probability" 856 */ 857 if (rule->cmd_len > 0) { 858 cmd = rule->cmd ; 859 if (cmd->opcode == O_PROB) { 860 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 861 double d = 1.0 * p->d[0]; 862 863 d = (d / 0x7fffffff); 864 printf("prob %f ", d); 865 } 866 } 867 868 /* 869 * first print actions 870 */ 871 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 872 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 873 switch(cmd->opcode) { 874 case O_CHECK_STATE: 875 printf("check-state"); 876 flags = HAVE_IP; /* avoid printing anything else */ 877 break; 878 879 case O_ACCEPT: 880 printf("allow"); 881 break; 882 883 case O_COUNT: 884 printf("count"); 885 break; 886 887 case O_DENY: 888 printf("deny"); 889 break; 890 891 case O_REJECT: 892 if (cmd->arg1 == ICMP_REJECT_RST) 893 printf("reset"); 894 else if (cmd->arg1 == ICMP_UNREACH_HOST) 895 printf("reject"); 896 else 897 print_reject_code(cmd->arg1); 898 break; 899 900 case O_SKIPTO: 901 printf("skipto %u", cmd->arg1); 902 break; 903 904 case O_PIPE: 905 printf("pipe %u", cmd->arg1); 906 break; 907 908 case O_QUEUE: 909 printf("queue %u", cmd->arg1); 910 break; 911 912 case O_DIVERT: 913 printf("divert %u", cmd->arg1); 914 break; 915 916 case O_TEE: 917 printf("tee %u", cmd->arg1); 918 break; 919 920 case O_FORWARD_IP: 921 { 922 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 923 924 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 925 if (s->sa.sin_port) 926 printf(",%d", s->sa.sin_port); 927 } 928 break; 929 930 case O_LOG: /* O_LOG is printed last */ 931 logptr = (ipfw_insn_log *)cmd; 932 break; 933 934 default: 935 printf("** unrecognized action %d len %d", 936 cmd->opcode, cmd->len); 937 } 938 } 939 if (logptr) { 940 if (logptr->max_log > 0) 941 printf(" log logamount %d", logptr->max_log); 942 else 943 printf(" log"); 944 } 945 946 /* 947 * then print the body. 948 */ 949 if (rule->_pad & 1) { /* empty rules before options */ 950 if (!do_compact) 951 printf(" ip from any to any"); 952 flags |= HAVE_IP | HAVE_OPTIONS; 953 } 954 955 for (l = rule->act_ofs, cmd = rule->cmd ; 956 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 957 /* useful alias */ 958 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 959 960 show_prerequisites(&flags, 0, cmd->opcode); 961 962 switch(cmd->opcode) { 963 case O_PROB: 964 break; /* done already */ 965 966 case O_PROBE_STATE: 967 break; /* no need to print anything here */ 968 969 case O_MACADDR2: { 970 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 971 972 if ((cmd->len & F_OR) && !or_block) 973 printf(" {"); 974 if (cmd->len & F_NOT) 975 printf(" not"); 976 printf(" MAC"); 977 flags |= HAVE_MAC; 978 print_mac( m->addr, m->mask); 979 print_mac( m->addr + 6, m->mask + 6); 980 } 981 break; 982 983 case O_MAC_TYPE: 984 if ((cmd->len & F_OR) && !or_block) 985 printf(" {"); 986 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 987 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 988 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 989 break; 990 991 case O_IP_SRC: 992 case O_IP_SRC_MASK: 993 case O_IP_SRC_ME: 994 case O_IP_SRC_SET: 995 show_prerequisites(&flags, HAVE_PROTO, 0); 996 if (!(flags & HAVE_SRCIP)) 997 printf(" from"); 998 if ((cmd->len & F_OR) && !or_block) 999 printf(" {"); 1000 print_ip((ipfw_insn_ip *)cmd, 1001 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1002 flags |= HAVE_SRCIP; 1003 break; 1004 1005 case O_IP_DST: 1006 case O_IP_DST_MASK: 1007 case O_IP_DST_ME: 1008 case O_IP_DST_SET: 1009 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1010 if (!(flags & HAVE_DSTIP)) 1011 printf(" to"); 1012 if ((cmd->len & F_OR) && !or_block) 1013 printf(" {"); 1014 print_ip((ipfw_insn_ip *)cmd, 1015 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1016 flags |= HAVE_DSTIP; 1017 break; 1018 1019 case O_IP_DSTPORT: 1020 show_prerequisites(&flags, HAVE_IP, 0); 1021 case O_IP_SRCPORT: 1022 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1023 if ((cmd->len & F_OR) && !or_block) 1024 printf(" {"); 1025 print_newports((ipfw_insn_u16 *)cmd, proto, 1026 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1027 break; 1028 1029 case O_PROTO: { 1030 struct protoent *pe; 1031 1032 if ((cmd->len & F_OR) && !or_block) 1033 printf(" {"); 1034 if (cmd->len & F_NOT) 1035 printf(" not"); 1036 proto = cmd->arg1; 1037 pe = getprotobynumber(cmd->arg1); 1038 if (flags & HAVE_OPTIONS) 1039 printf(" proto"); 1040 if (pe) 1041 printf(" %s", pe->p_name); 1042 else 1043 printf(" %u", cmd->arg1); 1044 } 1045 flags |= HAVE_PROTO; 1046 break; 1047 1048 default: /*options ... */ 1049 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1050 if ((cmd->len & F_OR) && !or_block) 1051 printf(" {"); 1052 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1053 printf(" not"); 1054 switch(cmd->opcode) { 1055 case O_FRAG: 1056 printf(" frag"); 1057 break; 1058 1059 case O_IN: 1060 printf(cmd->len & F_NOT ? " out" : " in"); 1061 break; 1062 1063 case O_LAYER2: 1064 printf(" layer2"); 1065 break; 1066 case O_XMIT: 1067 case O_RECV: 1068 case O_VIA: { 1069 char *s; 1070 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1071 1072 if (cmd->opcode == O_XMIT) 1073 s = "xmit"; 1074 else if (cmd->opcode == O_RECV) 1075 s = "recv"; 1076 else if (cmd->opcode == O_VIA) 1077 s = "via"; 1078 else 1079 s = "?huh?"; 1080 if (cmdif->name[0] == '\0') 1081 printf(" %s %s", s, 1082 inet_ntoa(cmdif->p.ip)); 1083 printf(" %s %s", s, cmdif->name); 1084 } 1085 break; 1086 1087 case O_IPID: 1088 printf(" ipid %u", cmd->arg1 ); 1089 break; 1090 1091 case O_IPTTL: 1092 printf(" ipttl %u", cmd->arg1 ); 1093 break; 1094 1095 case O_IPVER: 1096 printf(" ipver %u", cmd->arg1 ); 1097 break; 1098 1099 case O_IPPRECEDENCE: 1100 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1101 break; 1102 1103 case O_IPLEN: 1104 printf(" iplen %u", cmd->arg1 ); 1105 break; 1106 1107 case O_IPOPT: 1108 print_flags("ipoptions", cmd, f_ipopts); 1109 break; 1110 1111 case O_IPTOS: 1112 print_flags("iptos", cmd, f_iptos); 1113 break; 1114 1115 case O_ICMPTYPE: 1116 print_icmptypes((ipfw_insn_u32 *)cmd); 1117 break; 1118 1119 case O_ESTAB: 1120 printf(" established"); 1121 break; 1122 1123 case O_TCPFLAGS: 1124 print_flags("tcpflags", cmd, f_tcpflags); 1125 break; 1126 1127 case O_TCPOPTS: 1128 print_flags("tcpoptions", cmd, f_tcpopts); 1129 break; 1130 1131 case O_TCPWIN: 1132 printf(" tcpwin %d", ntohs(cmd->arg1)); 1133 break; 1134 1135 case O_TCPACK: 1136 printf(" tcpack %ld", ntohl(cmd32->d[0])); 1137 break; 1138 1139 case O_TCPSEQ: 1140 printf(" tcpseq %ld", ntohl(cmd32->d[0])); 1141 break; 1142 1143 case O_UID: 1144 { 1145 struct passwd *pwd = getpwuid(cmd32->d[0]); 1146 1147 if (pwd) 1148 printf(" uid %s", pwd->pw_name); 1149 else 1150 printf(" uid %u", cmd32->d[0]); 1151 } 1152 break; 1153 1154 case O_GID: 1155 { 1156 struct group *grp = getgrgid(cmd32->d[0]); 1157 1158 if (grp) 1159 printf(" gid %s", grp->gr_name); 1160 else 1161 printf(" gid %u", cmd32->d[0]); 1162 } 1163 break; 1164 1165 case O_KEEP_STATE: 1166 printf(" keep-state"); 1167 break; 1168 1169 case O_LIMIT: 1170 { 1171 struct _s_x *p = limit_masks; 1172 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1173 u_int8_t x = c->limit_mask; 1174 char *comma = " "; 1175 1176 printf(" limit"); 1177 for ( ; p->x != 0 ; p++) 1178 if ((x & p->x) == p->x) { 1179 x &= ~p->x; 1180 printf("%s%s", comma, p->s); 1181 comma = ","; 1182 } 1183 printf(" %d", c->conn_limit); 1184 } 1185 break; 1186 1187 default: 1188 printf(" [opcode %d len %d]", 1189 cmd->opcode, cmd->len); 1190 } 1191 } 1192 if (cmd->len & F_OR) { 1193 printf(" or"); 1194 or_block = 1; 1195 } else if (or_block) { 1196 printf(" }"); 1197 or_block = 0; 1198 } 1199 } 1200 show_prerequisites(&flags, HAVE_IP, 0); 1201 1202 printf("\n"); 1203 } 1204 1205 static void 1206 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1207 { 1208 struct protoent *pe; 1209 struct in_addr a; 1210 1211 if (!do_expired) { 1212 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1213 return; 1214 } 1215 1216 printf("%05d %*llu %*llu (%ds)", (int)(d->rule), pcwidth, d->pcnt, 1217 bcwidth, d->bcnt, d->expire); 1218 switch (d->dyn_type) { 1219 case O_LIMIT_PARENT: 1220 printf(" PARENT %d", d->count); 1221 break; 1222 case O_LIMIT: 1223 printf(" LIMIT"); 1224 break; 1225 case O_KEEP_STATE: /* bidir, no mask */ 1226 printf(" STATE"); 1227 break; 1228 } 1229 1230 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1231 printf(" %s", pe->p_name); 1232 else 1233 printf(" proto %u", d->id.proto); 1234 1235 a.s_addr = htonl(d->id.src_ip); 1236 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1237 1238 a.s_addr = htonl(d->id.dst_ip); 1239 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1240 printf("\n"); 1241 } 1242 1243 int 1244 sort_q(const void *pa, const void *pb) 1245 { 1246 int rev = (do_sort < 0); 1247 int field = rev ? -do_sort : do_sort; 1248 long long res = 0; 1249 const struct dn_ioc_flowqueue *a = pa; 1250 const struct dn_ioc_flowqueue *b = pb; 1251 1252 switch (field) { 1253 case 1: /* pkts */ 1254 res = a->len - b->len; 1255 break; 1256 case 2: /* bytes */ 1257 res = a->len_bytes - b->len_bytes; 1258 break; 1259 1260 case 3: /* tot pkts */ 1261 res = a->tot_pkts - b->tot_pkts; 1262 break; 1263 1264 case 4: /* tot bytes */ 1265 res = a->tot_bytes - b->tot_bytes; 1266 break; 1267 } 1268 if (res < 0) 1269 res = -1; 1270 if (res > 0) 1271 res = 1; 1272 return (int)(rev ? res : -res); 1273 } 1274 1275 static void 1276 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) 1277 { 1278 int l; 1279 1280 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1281 fs->flow_mask.u.ip.proto, 1282 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, 1283 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); 1284 if (fs->rq_elements == 0) 1285 return; 1286 1287 printf("BKT Prot ___Source IP/port____ " 1288 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1289 if (do_sort != 0) 1290 heapsort(q, fs->rq_elements, sizeof(*q), sort_q); 1291 for (l = 0; l < fs->rq_elements; l++) { 1292 struct in_addr ina; 1293 struct protoent *pe; 1294 1295 ina.s_addr = htonl(q[l].id.u.ip.src_ip); 1296 printf("%3d ", q[l].hash_slot); 1297 pe = getprotobynumber(q[l].id.u.ip.proto); 1298 if (pe) 1299 printf("%-4s ", pe->p_name); 1300 else 1301 printf("%4u ", q[l].id.u.ip.proto); 1302 printf("%15s/%-5d ", 1303 inet_ntoa(ina), q[l].id.u.ip.src_port); 1304 ina.s_addr = htonl(q[l].id.u.ip.dst_ip); 1305 printf("%15s/%-5d ", 1306 inet_ntoa(ina), q[l].id.u.ip.dst_port); 1307 printf("%4qu %8qu %2u %4u %3u\n", 1308 q[l].tot_pkts, q[l].tot_bytes, 1309 q[l].len, q[l].len_bytes, q[l].drops); 1310 if (verbose) 1311 printf(" S %20qd F %20qd\n", 1312 q[l].S, q[l].F); 1313 } 1314 } 1315 1316 static void 1317 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) 1318 { 1319 int l; 1320 char qs[30]; 1321 char plr[30]; 1322 char red[90]; /* Display RED parameters */ 1323 1324 l = fs->qsize; 1325 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1326 if (l >= 8192) 1327 sprintf(qs, "%d KB", l / 1024); 1328 else 1329 sprintf(qs, "%d B", l); 1330 } else 1331 sprintf(qs, "%3d sl.", l); 1332 if (fs->plr) 1333 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1334 else 1335 plr[0] = '\0'; 1336 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1337 sprintf(red, 1338 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1339 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1340 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1341 SCALE_VAL(fs->min_th), 1342 SCALE_VAL(fs->max_th), 1343 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1344 else 1345 sprintf(red, "droptail"); 1346 1347 printf("%s %s%s %d queues (%d buckets) %s\n", 1348 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1349 } 1350 1351 static void 1352 list_pipes(void *data, int nbytes, int ac, char *av[]) 1353 { 1354 u_long rulenum; 1355 void *next = data; 1356 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; 1357 struct dn_ioc_flowset *fs; 1358 struct dn_ioc_flowqueue *q; 1359 int l; 1360 1361 if (ac > 0) 1362 rulenum = strtoul(*av++, NULL, 10); 1363 else 1364 rulenum = 0; 1365 for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) { 1366 double b = p->bandwidth; 1367 char buf[30]; 1368 char prefix[80]; 1369 1370 if (p->fs.fs_type != DN_IS_PIPE) 1371 break; /* done with pipes, now queues */ 1372 1373 /* 1374 * compute length, as pipe have variable size 1375 */ 1376 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1377 next = (void *)p + l; 1378 nbytes -= l; 1379 1380 if (rulenum != 0 && rulenum != p->pipe_nr) 1381 continue; 1382 1383 /* 1384 * Print rate 1385 */ 1386 if (b == 0) 1387 sprintf(buf, "unlimited"); 1388 else if (b >= 1000000) 1389 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1390 else if (b >= 1000) 1391 sprintf(buf, "%7.3f Kbit/s", b/1000); 1392 else 1393 sprintf(buf, "%7.3f bit/s ", b); 1394 1395 sprintf(prefix, "%05d: %s %4d ms ", 1396 p->pipe_nr, buf, p->delay); 1397 print_flowset_parms(&p->fs, prefix); 1398 if (verbose) 1399 printf(" V %20qd\n", p->V >> MY_M); 1400 1401 q = (struct dn_ioc_flowqueue *)(p+1); 1402 list_queues(&p->fs, q); 1403 } 1404 for (fs = next; nbytes >= sizeof(*fs); fs = next) { 1405 char prefix[80]; 1406 1407 if (fs->fs_type != DN_IS_QUEUE) 1408 break; 1409 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1410 next = (void *)fs + l; 1411 nbytes -= l; 1412 q = (struct dn_ioc_flowqueue *)(fs+1); 1413 sprintf(prefix, "q%05d: weight %d pipe %d ", 1414 fs->fs_nr, fs->weight, fs->parent_nr); 1415 print_flowset_parms(fs, prefix); 1416 list_queues(fs, q); 1417 } 1418 } 1419 1420 /* 1421 * This one handles all set-related commands 1422 * ipfw set { show | enable | disable } 1423 * ipfw set swap X Y 1424 * ipfw set move X to Y 1425 * ipfw set move rule X to Y 1426 */ 1427 static void 1428 sets_handler(int ac, char *av[]) 1429 { 1430 u_int32_t set_disable, masks[2]; 1431 int i, nbytes; 1432 u_int16_t rulenum; 1433 u_int8_t cmd, new_set; 1434 1435 ac--; 1436 av++; 1437 1438 if (!ac) 1439 errx(EX_USAGE, "set needs command"); 1440 if (!strncmp(*av, "show", strlen(*av)) ) { 1441 void *data; 1442 char *msg; 1443 1444 nbytes = sizeof(struct ip_fw); 1445 if ((data = malloc(nbytes)) == NULL) 1446 err(EX_OSERR, "malloc"); 1447 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1448 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1449 set_disable = (u_int32_t)(((struct ip_fw *)data)->next_rule); 1450 1451 for (i = 0, msg = "disable" ; i < 31; i++) 1452 if ( (set_disable & (1<<i))) { 1453 printf("%s %d", msg, i); 1454 msg = ""; 1455 } 1456 msg = (set_disable) ? " enable" : "enable"; 1457 for (i = 0; i < 31; i++) 1458 if ( !(set_disable & (1<<i))) { 1459 printf("%s %d", msg, i); 1460 msg = ""; 1461 } 1462 printf("\n"); 1463 } else if (!strncmp(*av, "swap", strlen(*av))) { 1464 ac--; av++; 1465 if (ac != 2) 1466 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1467 rulenum = atoi(av[0]); 1468 new_set = atoi(av[1]); 1469 if (!isdigit(*(av[0])) || rulenum > 30) 1470 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1471 if (!isdigit(*(av[1])) || new_set > 30) 1472 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1473 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1474 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1475 masks, sizeof(u_int32_t)); 1476 } else if (!strncmp(*av, "move", strlen(*av))) { 1477 ac--; av++; 1478 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1479 cmd = 2; 1480 ac--; av++; 1481 } else 1482 cmd = 3; 1483 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1484 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1485 rulenum = atoi(av[0]); 1486 new_set = atoi(av[2]); 1487 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1488 (cmd == 2 && rulenum == 65535) ) 1489 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1490 if (!isdigit(*(av[2])) || new_set > 30) 1491 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1492 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1493 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1494 masks, sizeof(u_int32_t)); 1495 } else if (!strncmp(*av, "disable", strlen(*av)) || 1496 !strncmp(*av, "enable", strlen(*av)) ) { 1497 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1498 1499 ac--; av++; 1500 masks[0] = masks[1] = 0; 1501 1502 while (ac) { 1503 if (isdigit(**av)) { 1504 i = atoi(*av); 1505 if (i < 0 || i > 30) 1506 errx(EX_DATAERR, 1507 "invalid set number %d\n", i); 1508 masks[which] |= (1<<i); 1509 } else if (!strncmp(*av, "disable", strlen(*av))) 1510 which = 0; 1511 else if (!strncmp(*av, "enable", strlen(*av))) 1512 which = 1; 1513 else 1514 errx(EX_DATAERR, 1515 "invalid set command %s\n", *av); 1516 av++; ac--; 1517 } 1518 if ( (masks[0] & masks[1]) != 0 ) 1519 errx(EX_DATAERR, 1520 "cannot enable and disable the same set\n"); 1521 1522 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1523 if (i) 1524 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1525 } else 1526 errx(EX_USAGE, "invalid set command %s\n", *av); 1527 } 1528 1529 static void 1530 sysctl_handler(int ac, char *av[], int which) 1531 { 1532 ac--; 1533 av++; 1534 1535 if (*av == NULL) { 1536 warnx("missing keyword to enable/disable\n"); 1537 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1538 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1539 &which, sizeof(which)); 1540 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1541 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1542 &which, sizeof(which)); 1543 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1544 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1545 &which, sizeof(which)); 1546 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1547 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1548 &which, sizeof(which)); 1549 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1550 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1551 &which, sizeof(which)); 1552 } else { 1553 warnx("unrecognize enable/disable keyword: %s\n", *av); 1554 } 1555 } 1556 1557 static void 1558 list(int ac, char *av[]) 1559 { 1560 struct ip_fw *r; 1561 ipfw_dyn_rule *dynrules, *d; 1562 1563 void *lim, *data = NULL; 1564 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1565 int exitval = EX_OK; 1566 int lac; 1567 char **lav; 1568 u_long rnum; 1569 char *endptr; 1570 int seen = 0; 1571 1572 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1573 int nalloc = 1024; /* start somewhere... */ 1574 1575 ac--; 1576 av++; 1577 1578 /* get rules or pipes from kernel, resizing array as necessary */ 1579 nbytes = nalloc; 1580 1581 while (nbytes >= nalloc) { 1582 nalloc = nalloc * 2 + 200; 1583 nbytes = nalloc; 1584 if ((data = realloc(data, nbytes)) == NULL) 1585 err(EX_OSERR, "realloc"); 1586 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1587 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1588 do_pipe ? "DUMMYNET" : "FW"); 1589 } 1590 1591 if (do_pipe) { 1592 list_pipes(data, nbytes, ac, av); 1593 goto done; 1594 } 1595 1596 /* 1597 * Count static rules. They have variable size so we 1598 * need to scan the list to count them. 1599 */ 1600 for (nstat = 1, r = data, lim = data + nbytes; 1601 r->rulenum < 65535 && (void *)r < lim; 1602 ++nstat, r = (void *)r + RULESIZE(r) ) 1603 ; /* nothing */ 1604 1605 /* 1606 * Count dynamic rules. This is easier as they have 1607 * fixed size. 1608 */ 1609 r = (void *)r + RULESIZE(r); 1610 dynrules = (ipfw_dyn_rule *)r ; 1611 n = (void *)r - data; 1612 ndyn = (nbytes - n) / sizeof *dynrules; 1613 1614 /* if showing stats, figure out column widths ahead of time */ 1615 bcwidth = pcwidth = 0; 1616 if (do_acct) { 1617 for (n = 0, r = data; n < nstat; 1618 n++, r = (void *)r + RULESIZE(r)) { 1619 /* packet counter */ 1620 width = snprintf(NULL, 0, "%llu", r->pcnt); 1621 if (width > pcwidth) 1622 pcwidth = width; 1623 1624 /* byte counter */ 1625 width = snprintf(NULL, 0, "%llu", r->bcnt); 1626 if (width > bcwidth) 1627 bcwidth = width; 1628 } 1629 } 1630 if (do_dynamic && ndyn) { 1631 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1632 width = snprintf(NULL, 0, "%llu", d->pcnt); 1633 if (width > pcwidth) 1634 pcwidth = width; 1635 1636 width = snprintf(NULL, 0, "%llu", d->bcnt); 1637 if (width > bcwidth) 1638 bcwidth = width; 1639 } 1640 } 1641 /* if no rule numbers were specified, list all rules */ 1642 if (ac == 0) { 1643 for (n = 0, r = data; n < nstat; 1644 n++, r = (void *)r + RULESIZE(r) ) 1645 show_ipfw(r, pcwidth, bcwidth); 1646 1647 if (do_dynamic && ndyn) { 1648 printf("## Dynamic rules (%d):\n", ndyn); 1649 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1650 show_dyn_ipfw(d, pcwidth, bcwidth); 1651 } 1652 goto done; 1653 } 1654 1655 /* display specific rules requested on command line */ 1656 1657 for (lac = ac, lav = av; lac != 0; lac--) { 1658 /* convert command line rule # */ 1659 rnum = strtoul(*lav++, &endptr, 10); 1660 if (*endptr) { 1661 exitval = EX_USAGE; 1662 warnx("invalid rule number: %s", *(lav - 1)); 1663 continue; 1664 } 1665 for (n = seen = 0, r = data; n < nstat; 1666 n++, r = (void *)r + RULESIZE(r) ) { 1667 if (r->rulenum > rnum) 1668 break; 1669 if (r->rulenum == rnum) { 1670 show_ipfw(r, pcwidth, bcwidth); 1671 seen = 1; 1672 } 1673 } 1674 if (!seen) { 1675 /* give precedence to other error(s) */ 1676 if (exitval == EX_OK) 1677 exitval = EX_UNAVAILABLE; 1678 warnx("rule %lu does not exist", rnum); 1679 } 1680 } 1681 1682 if (do_dynamic && ndyn) { 1683 printf("## Dynamic rules:\n"); 1684 for (lac = ac, lav = av; lac != 0; lac--) { 1685 rnum = strtoul(*lav++, &endptr, 10); 1686 if (*endptr) 1687 /* already warned */ 1688 continue; 1689 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1690 if ((int)(d->rule) > rnum) 1691 break; 1692 if ((int)(d->rule) == rnum) 1693 show_dyn_ipfw(d, pcwidth, bcwidth); 1694 } 1695 } 1696 } 1697 1698 ac = 0; 1699 1700 done: 1701 free(data); 1702 1703 if (exitval != EX_OK) 1704 exit(exitval); 1705 } 1706 1707 static void 1708 show_usage(void) 1709 { 1710 fprintf(stderr, "usage: ipfw [options]\n" 1711 " add [number] rule\n" 1712 " pipe number config [pipeconfig]\n" 1713 " queue number config [queueconfig]\n" 1714 " [pipe] flush\n" 1715 " [pipe] delete number ...\n" 1716 " [pipe] {list|show} [number ...]\n" 1717 " {zero|resetlog} [number ...]\n" 1718 "do \"ipfw -h\" or see ipfw manpage for details\n" 1719 ); 1720 1721 exit(EX_USAGE); 1722 } 1723 1724 static void 1725 help(void) 1726 { 1727 1728 fprintf(stderr, "ipfw syntax summary:\n" 1729 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1730 "ipfw {pipe|queue} N config BODY\n" 1731 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1732 "\n" 1733 "RULE: [1..] [PROB] BODY\n" 1734 "RULENUM: INTEGER(1..65534)\n" 1735 "PROB: prob REAL(0..1)\n" 1736 "BODY: check-state [LOG] (no body) |\n" 1737 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1738 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1739 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1740 "ADDR: [ MAC dst src ether_type ] \n" 1741 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1742 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1743 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1744 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1745 ); 1746 exit(0); 1747 } 1748 1749 1750 static int 1751 lookup_host (char *host, struct in_addr *ipaddr) 1752 { 1753 struct hostent *he; 1754 1755 if (!inet_aton(host, ipaddr)) { 1756 if ((he = gethostbyname(host)) == NULL) 1757 return(-1); 1758 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1759 } 1760 return(0); 1761 } 1762 1763 /* 1764 * fills the addr and mask fields in the instruction as appropriate from av. 1765 * Update length as appropriate. 1766 * The following formats are allowed: 1767 * any matches any IP. Actually returns an empty instruction. 1768 * me returns O_IP_*_ME 1769 * 1.2.3.4 single IP address 1770 * 1.2.3.4:5.6.7.8 address:mask 1771 * 1.2.3.4/24 address/mask 1772 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1773 */ 1774 static void 1775 fill_ip(ipfw_insn_ip *cmd, char *av) 1776 { 1777 char *p = 0, md = 0; 1778 u_int32_t i; 1779 1780 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1781 1782 if (!strncmp(av, "any", strlen(av))) 1783 return; 1784 1785 if (!strncmp(av, "me", strlen(av))) { 1786 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1787 return; 1788 } 1789 1790 p = strchr(av, '/'); 1791 if (!p) 1792 p = strchr(av, ':'); 1793 if (p) { 1794 md = *p; 1795 *p++ = '\0'; 1796 } 1797 1798 if (lookup_host(av, &cmd->addr) != 0) 1799 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1800 switch (md) { 1801 case ':': 1802 if (!inet_aton(p, &cmd->mask)) 1803 errx(EX_DATAERR, "bad netmask ``%s''", p); 1804 break; 1805 case '/': 1806 i = atoi(p); 1807 if (i == 0) 1808 cmd->mask.s_addr = htonl(0); 1809 else if (i > 32) 1810 errx(EX_DATAERR, "bad width ``%s''", p); 1811 else 1812 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1813 break; 1814 default: 1815 cmd->mask.s_addr = htonl(~0); 1816 break; 1817 } 1818 cmd->addr.s_addr &= cmd->mask.s_addr; 1819 /* 1820 * now look if we have a set of addresses. They are stored as follows: 1821 * arg1 is the set size (powers of 2, 2..256) 1822 * addr is the base address IN HOST FORMAT 1823 * mask.. is an array of u_int32_t with bits set. 1824 */ 1825 if (p) 1826 p = strchr(p, '{'); 1827 if (p) { /* fetch addresses */ 1828 u_int32_t *d; 1829 int low, high; 1830 int i = contigmask((u_char *)&(cmd->mask), 32); 1831 1832 if (i < 24 || i > 31) { 1833 fprintf(stderr, "invalid set with mask %d\n", 1834 i); 1835 exit(0); 1836 } 1837 cmd->o.arg1 = 1<<(32-i); 1838 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1839 d = (u_int32_t *)&cmd->mask; 1840 cmd->o.opcode = O_IP_DST_SET; /* default */ 1841 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1842 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1843 d[i] = 0; /* clear masks */ 1844 1845 av = p+1; 1846 low = cmd->addr.s_addr & 0xff; 1847 high = low + cmd->o.arg1 - 1; 1848 while (isdigit(*av)) { 1849 char *s; 1850 u_int16_t a = strtol(av, &s, 0); 1851 1852 if (s == av) /* no parameter */ 1853 break; 1854 if (a < low || a > high) { 1855 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1856 a, low, high); 1857 exit(0); 1858 } 1859 a -= low; 1860 d[ a/32] |= 1<<(a & 31); 1861 if (*s != ',') 1862 break; 1863 av = s+1; 1864 } 1865 return; 1866 } 1867 1868 if (cmd->mask.s_addr == 0) { /* any */ 1869 if (cmd->o.len & F_NOT) 1870 errx(EX_DATAERR, "not any never matches"); 1871 else /* useless, nuke it */ 1872 return; 1873 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1874 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1875 else /* addr/mask */ 1876 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1877 } 1878 1879 1880 /* 1881 * helper function to process a set of flags and set bits in the 1882 * appropriate masks. 1883 */ 1884 static void 1885 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1886 struct _s_x *flags, char *p) 1887 { 1888 u_int8_t set=0, clear=0; 1889 1890 while (p && *p) { 1891 char *q; /* points to the separator */ 1892 int val; 1893 u_int8_t *which; /* mask we are working on */ 1894 1895 if (*p == '!') { 1896 p++; 1897 which = &clear; 1898 } else 1899 which = &set; 1900 q = strchr(p, ','); 1901 if (q) 1902 *q++ = '\0'; 1903 val = match_token(flags, p); 1904 if (val <= 0) 1905 errx(EX_DATAERR, "invalid flag %s", p); 1906 *which |= (u_int8_t)val; 1907 p = q; 1908 } 1909 cmd->opcode = opcode; 1910 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 1911 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 1912 } 1913 1914 1915 static void 1916 delete(int ac, char *av[]) 1917 { 1918 u_int32_t rulenum; 1919 struct dn_ioc_pipe pipe; 1920 int i; 1921 int exitval = EX_OK; 1922 int do_set = 0; 1923 1924 memset(&pipe, 0, sizeof pipe); 1925 1926 av++; ac--; 1927 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 1928 do_set = 1; /* delete set */ 1929 ac--; av++; 1930 } 1931 1932 /* Rule number */ 1933 while (ac && isdigit(**av)) { 1934 i = atoi(*av); av++; ac--; 1935 if (do_pipe) { 1936 if (do_pipe == 1) 1937 pipe.pipe_nr = i; 1938 else 1939 pipe.fs.fs_nr = i; 1940 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 1941 &pipe, sizeof pipe); 1942 if (i) { 1943 exitval = 1; 1944 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 1945 do_pipe == 1 ? pipe.pipe_nr : 1946 pipe.fs.fs_nr); 1947 } 1948 } else { 1949 rulenum = (i & 0xffff) | (do_set << 24); 1950 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 1951 sizeof rulenum); 1952 if (i) { 1953 exitval = EX_UNAVAILABLE; 1954 warn("rule %u: setsockopt(IP_FW_DEL)", 1955 rulenum); 1956 } 1957 } 1958 } 1959 if (exitval != EX_OK) 1960 exit(exitval); 1961 } 1962 1963 1964 /* 1965 * fill the interface structure. We do not check the name as we can 1966 * create interfaces dynamically, so checking them at insert time 1967 * makes relatively little sense. 1968 * Interface names containing '*', '?', or '[' are assumed to be shell 1969 * patterns which match interfaces. 1970 */ 1971 static void 1972 fill_iface(ipfw_insn_if *cmd, char *arg) 1973 { 1974 cmd->name[0] = '\0'; 1975 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 1976 1977 /* Parse the interface or address */ 1978 if (!strcmp(arg, "any")) 1979 cmd->o.len = 0; /* effectively ignore this command */ 1980 else if (!isdigit(*arg)) { 1981 strlcpy(cmd->name, arg, sizeof(cmd->name)); 1982 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 1983 } else if (!inet_aton(arg, &cmd->p.ip)) 1984 errx(EX_DATAERR, "bad ip address ``%s''", arg); 1985 } 1986 1987 static unsigned long 1988 getbw(const char *str, u_short *flags, int kb) 1989 { 1990 char *end; 1991 unsigned long val; 1992 int inbytes = 0; 1993 1994 val = strtoul(str, &end, 0); 1995 if (*end == 'k' || *end == 'K') { 1996 ++end; 1997 val *= kb; 1998 } else if (*end == 'm' || *end == 'M') { 1999 ++end; 2000 val *= kb * kb; 2001 } 2002 2003 /* 2004 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 2005 * trailer assume bits. 2006 */ 2007 if (strncasecmp(end, "bit", 3) == 0) { 2008 ; 2009 } else if (strncasecmp(end, "byte", 4) == 0) { 2010 inbytes = 1; 2011 } else if (*end == 'b') { 2012 ; 2013 } else if (*end == 'B') { 2014 inbytes = 1; 2015 } 2016 2017 /* 2018 * Return in bits if flags is NULL, else flag bits 2019 * or bytes in flags and return the unconverted value. 2020 */ 2021 if (inbytes && flags) 2022 *flags |= DN_QSIZE_IS_BYTES; 2023 else if (inbytes && flags == NULL) 2024 val *= 8; 2025 return(val); 2026 } 2027 2028 /* 2029 * the following macro returns an error message if we run out of 2030 * arguments. 2031 */ 2032 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2033 2034 static void 2035 config_pipe(int ac, char **av) 2036 { 2037 struct dn_ioc_pipe pipe; 2038 int i; 2039 char *end; 2040 u_int32_t a; 2041 void *par = NULL; 2042 2043 memset(&pipe, 0, sizeof pipe); 2044 2045 av++; ac--; 2046 /* Pipe number */ 2047 if (ac && isdigit(**av)) { 2048 i = atoi(*av); av++; ac--; 2049 if (do_pipe == 1) 2050 pipe.pipe_nr = i; 2051 else 2052 pipe.fs.fs_nr = i; 2053 } 2054 while (ac > 0) { 2055 double d; 2056 int tok = match_token(dummynet_params, *av); 2057 ac--; av++; 2058 2059 switch(tok) { 2060 case TOK_NOERROR: 2061 pipe.fs.flags_fs |= DN_NOERROR; 2062 break; 2063 2064 case TOK_PLR: 2065 NEED1("plr needs argument 0..1\n"); 2066 d = strtod(av[0], NULL); 2067 if (d > 1) 2068 d = 1; 2069 else if (d < 0) 2070 d = 0; 2071 pipe.fs.plr = (int)(d*0x7fffffff); 2072 ac--; av++; 2073 break; 2074 2075 case TOK_QUEUE: 2076 NEED1("queue needs queue size\n"); 2077 end = NULL; 2078 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2079 ac--; av++; 2080 break; 2081 2082 case TOK_BUCKETS: 2083 NEED1("buckets needs argument\n"); 2084 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2085 ac--; av++; 2086 break; 2087 2088 case TOK_MASK: 2089 NEED1("mask needs mask specifier\n"); 2090 /* 2091 * per-flow queue, mask is dst_ip, dst_port, 2092 * src_ip, src_port, proto measured in bits 2093 */ 2094 par = NULL; 2095 2096 pipe.fs.flow_mask.type = ETHERTYPE_IP; 2097 pipe.fs.flow_mask.u.ip.dst_ip = 0; 2098 pipe.fs.flow_mask.u.ip.src_ip = 0; 2099 pipe.fs.flow_mask.u.ip.dst_port = 0; 2100 pipe.fs.flow_mask.u.ip.src_port = 0; 2101 pipe.fs.flow_mask.u.ip.proto = 0; 2102 end = NULL; 2103 2104 while (ac >= 1) { 2105 u_int32_t *p32 = NULL; 2106 u_int16_t *p16 = NULL; 2107 2108 tok = match_token(dummynet_params, *av); 2109 ac--; av++; 2110 switch(tok) { 2111 case TOK_ALL: 2112 /* 2113 * special case, all bits significant 2114 */ 2115 pipe.fs.flow_mask.u.ip.dst_ip = ~0; 2116 pipe.fs.flow_mask.u.ip.src_ip = ~0; 2117 pipe.fs.flow_mask.u.ip.dst_port = ~0; 2118 pipe.fs.flow_mask.u.ip.src_port = ~0; 2119 pipe.fs.flow_mask.u.ip.proto = ~0; 2120 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2121 goto end_mask; 2122 2123 case TOK_DSTIP: 2124 p32 = &pipe.fs.flow_mask.u.ip.dst_ip; 2125 break; 2126 2127 case TOK_SRCIP: 2128 p32 = &pipe.fs.flow_mask.u.ip.src_ip; 2129 break; 2130 2131 case TOK_DSTPORT: 2132 p16 = &pipe.fs.flow_mask.u.ip.dst_port; 2133 break; 2134 2135 case TOK_SRCPORT: 2136 p16 = &pipe.fs.flow_mask.u.ip.src_port; 2137 break; 2138 2139 case TOK_PROTO: 2140 break; 2141 2142 default: 2143 ac++; av--; /* backtrack */ 2144 goto end_mask; 2145 } 2146 if (ac < 1) 2147 errx(EX_USAGE, "mask: value missing"); 2148 if (*av[0] == '/') { 2149 a = strtoul(av[0]+1, &end, 0); 2150 a = (a == 32) ? ~0 : (1 << a) - 1; 2151 } else 2152 a = strtoul(av[0], &end, 0); 2153 if (p32 != NULL) 2154 *p32 = a; 2155 else if (p16 != NULL) { 2156 if (a > 65535) 2157 errx(EX_DATAERR, 2158 "mask: must be 16 bit"); 2159 *p16 = (u_int16_t)a; 2160 } else { 2161 if (a > 255) 2162 errx(EX_DATAERR, 2163 "mask: must be 8 bit"); 2164 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; 2165 } 2166 if (a != 0) 2167 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2168 ac--; av++; 2169 } /* end while, config masks */ 2170 end_mask: 2171 break; 2172 2173 case TOK_RED: 2174 case TOK_GRED: 2175 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2176 pipe.fs.flags_fs |= DN_IS_RED; 2177 if (tok == TOK_GRED) 2178 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2179 /* 2180 * the format for parameters is w_q/min_th/max_th/max_p 2181 */ 2182 if ((end = strsep(&av[0], "/"))) { 2183 double w_q = strtod(end, NULL); 2184 if (w_q > 1 || w_q <= 0) 2185 errx(EX_DATAERR, "0 < w_q <= 1"); 2186 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2187 } 2188 if ((end = strsep(&av[0], "/"))) { 2189 pipe.fs.min_th = strtoul(end, &end, 0); 2190 if (*end == 'K' || *end == 'k') 2191 pipe.fs.min_th *= 1024; 2192 } 2193 if ((end = strsep(&av[0], "/"))) { 2194 pipe.fs.max_th = strtoul(end, &end, 0); 2195 if (*end == 'K' || *end == 'k') 2196 pipe.fs.max_th *= 1024; 2197 } 2198 if ((end = strsep(&av[0], "/"))) { 2199 double max_p = strtod(end, NULL); 2200 if (max_p > 1 || max_p <= 0) 2201 errx(EX_DATAERR, "0 < max_p <= 1"); 2202 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2203 } 2204 ac--; av++; 2205 break; 2206 2207 case TOK_DROPTAIL: 2208 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2209 break; 2210 2211 case TOK_BW: 2212 NEED1("bw needs bandwidth\n"); 2213 if (do_pipe != 1) 2214 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2215 /* 2216 * set bandwidth value 2217 */ 2218 pipe.bandwidth = getbw(av[0], NULL, 1000); 2219 if (pipe.bandwidth < 0) 2220 errx(EX_DATAERR, "bandwidth too large"); 2221 ac--; av++; 2222 break; 2223 2224 case TOK_DELAY: 2225 if (do_pipe != 1) 2226 errx(EX_DATAERR, "delay only valid for pipes"); 2227 NEED1("delay needs argument 0..10000ms\n"); 2228 pipe.delay = strtoul(av[0], NULL, 0); 2229 ac--; av++; 2230 break; 2231 2232 case TOK_WEIGHT: 2233 if (do_pipe == 1) 2234 errx(EX_DATAERR,"weight only valid for queues"); 2235 NEED1("weight needs argument 0..100\n"); 2236 pipe.fs.weight = strtoul(av[0], &end, 0); 2237 ac--; av++; 2238 break; 2239 2240 case TOK_PIPE: 2241 if (do_pipe == 1) 2242 errx(EX_DATAERR,"pipe only valid for queues"); 2243 NEED1("pipe needs pipe_number\n"); 2244 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2245 ac--; av++; 2246 break; 2247 2248 default: 2249 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2250 } 2251 } 2252 if (do_pipe == 1) { 2253 if (pipe.pipe_nr == 0) 2254 errx(EX_DATAERR, "pipe_nr must be > 0"); 2255 if (pipe.delay > 10000) 2256 errx(EX_DATAERR, "delay must be < 10000"); 2257 } else { /* do_pipe == 2, queue */ 2258 if (pipe.fs.parent_nr == 0) 2259 errx(EX_DATAERR, "pipe must be > 0"); 2260 if (pipe.fs.weight >100) 2261 errx(EX_DATAERR, "weight must be <= 100"); 2262 } 2263 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2264 if (pipe.fs.qsize > 1024*1024) 2265 errx(EX_DATAERR, "queue size must be < 1MB"); 2266 } else { 2267 if (pipe.fs.qsize > 100) 2268 errx(EX_DATAERR, "2 <= queue size <= 100"); 2269 } 2270 if (pipe.fs.flags_fs & DN_IS_RED) { 2271 size_t len; 2272 int lookup_depth, avg_pkt_size; 2273 double s, idle, weight, w_q; 2274 int clock_hz; 2275 int t; 2276 2277 if (pipe.fs.min_th >= pipe.fs.max_th) 2278 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2279 pipe.fs.min_th, pipe.fs.max_th); 2280 if (pipe.fs.max_th == 0) 2281 errx(EX_DATAERR, "max_th must be > 0"); 2282 2283 len = sizeof(int); 2284 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2285 &lookup_depth, &len, NULL, 0) == -1) 2286 2287 errx(1, "sysctlbyname(\"%s\")", 2288 "net.inet.ip.dummynet.red_lookup_depth"); 2289 if (lookup_depth == 0) 2290 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2291 " must be greater than zero"); 2292 2293 len = sizeof(int); 2294 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2295 &avg_pkt_size, &len, NULL, 0) == -1) 2296 2297 errx(1, "sysctlbyname(\"%s\")", 2298 "net.inet.ip.dummynet.red_avg_pkt_size"); 2299 if (avg_pkt_size == 0) 2300 errx(EX_DATAERR, 2301 "net.inet.ip.dummynet.red_avg_pkt_size must" 2302 " be greater than zero"); 2303 2304 len = sizeof(clock_hz); 2305 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, 2306 NULL, 0) == -1) { 2307 errx(1, "sysctlbyname(\"%s\")", 2308 "net.inet.ip.dummynet.hz"); 2309 } 2310 2311 /* 2312 * Ticks needed for sending a medium-sized packet. 2313 * Unfortunately, when we are configuring a WF2Q+ queue, we 2314 * do not have bandwidth information, because that is stored 2315 * in the parent pipe, and also we have multiple queues 2316 * competing for it. So we set s=0, which is not very 2317 * correct. But on the other hand, why do we want RED with 2318 * WF2Q+ ? 2319 */ 2320 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2321 s = 0; 2322 else 2323 s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; 2324 2325 /* 2326 * max idle time (in ticks) before avg queue size becomes 0. 2327 * NOTA: (3/w_q) is approx the value x so that 2328 * (1-w_q)^x < 10^-3. 2329 */ 2330 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2331 idle = s * 3. / w_q; 2332 pipe.fs.lookup_step = (int)idle / lookup_depth; 2333 if (!pipe.fs.lookup_step) 2334 pipe.fs.lookup_step = 1; 2335 weight = 1 - w_q; 2336 for (t = pipe.fs.lookup_step; t > 0; --t) 2337 weight *= weight; 2338 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2339 } 2340 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2341 sizeof pipe); 2342 if (i) 2343 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2344 } 2345 2346 static void 2347 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2348 { 2349 int i, l; 2350 2351 for (i=0; i<6; i++) 2352 addr[i] = mask[i] = 0; 2353 if (!strcmp(p, "any")) 2354 return; 2355 2356 for (i=0; *p && i<6;i++, p++) { 2357 addr[i] = strtol(p, &p, 16); 2358 if (*p != ':') /* we start with the mask */ 2359 break; 2360 } 2361 if (*p == '/') { /* mask len */ 2362 l = strtol(p+1, &p, 0); 2363 for (i=0; l>0; l -=8, i++) 2364 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2365 } else if (*p == '&') { /* mask */ 2366 for (i=0, p++; *p && i<6;i++, p++) { 2367 mask[i] = strtol(p, &p, 16); 2368 if (*p != ':') 2369 break; 2370 } 2371 } else if (*p == '\0') { 2372 for (i=0; i<6; i++) 2373 mask[i] = 0xff; 2374 } 2375 for (i=0; i<6; i++) 2376 addr[i] &= mask[i]; 2377 } 2378 2379 /* 2380 * helper function, updates the pointer to cmd with the length 2381 * of the current command, and also cleans up the first word of 2382 * the new command in case it has been clobbered before. 2383 */ 2384 static ipfw_insn * 2385 next_cmd(ipfw_insn *cmd) 2386 { 2387 cmd += F_LEN(cmd); 2388 bzero(cmd, sizeof(*cmd)); 2389 return cmd; 2390 } 2391 2392 /* 2393 * A function to fill simple commands of size 1. 2394 * Existing flags are preserved. 2395 */ 2396 static void 2397 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2398 { 2399 cmd->opcode = opcode; 2400 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2401 cmd->arg1 = arg; 2402 } 2403 2404 /* 2405 * Fetch and add the MAC address and type, with masks. This generates one or 2406 * two microinstructions, and returns the pointer to the last one. 2407 */ 2408 static ipfw_insn * 2409 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2410 { 2411 ipfw_insn_mac *mac; 2412 2413 if (ac < 2) 2414 errx(EX_DATAERR, "MAC dst src"); 2415 2416 cmd->opcode = O_MACADDR2; 2417 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2418 2419 mac = (ipfw_insn_mac *)cmd; 2420 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2421 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2422 return cmd; 2423 } 2424 2425 static ipfw_insn * 2426 add_mactype(ipfw_insn *cmd, int ac, char *av) 2427 { 2428 if (ac < 1) 2429 errx(EX_DATAERR, "missing MAC type"); 2430 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2431 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2432 cmd->opcode = O_MAC_TYPE; 2433 return cmd; 2434 } else 2435 return NULL; 2436 } 2437 2438 static ipfw_insn * 2439 add_proto(ipfw_insn *cmd, char *av) 2440 { 2441 struct protoent *pe; 2442 u_char proto = 0; 2443 2444 if (!strncmp(av, "all", strlen(av))) 2445 ; /* same as "ip" */ 2446 else if ((proto = atoi(av)) > 0) 2447 ; /* all done! */ 2448 else if ((pe = getprotobyname(av)) != NULL) 2449 proto = pe->p_proto; 2450 else 2451 return NULL; 2452 if (proto != IPPROTO_IP) 2453 fill_cmd(cmd, O_PROTO, 0, proto); 2454 return cmd; 2455 } 2456 2457 static ipfw_insn * 2458 add_srcip(ipfw_insn *cmd, char *av) 2459 { 2460 fill_ip((ipfw_insn_ip *)cmd, av); 2461 if (cmd->opcode == O_IP_DST_SET) /* set */ 2462 cmd->opcode = O_IP_SRC_SET; 2463 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2464 cmd->opcode = O_IP_SRC_ME; 2465 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2466 cmd->opcode = O_IP_SRC; 2467 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2468 cmd->opcode = O_IP_SRC_MASK; 2469 return cmd; 2470 } 2471 2472 static ipfw_insn * 2473 add_dstip(ipfw_insn *cmd, char *av) 2474 { 2475 fill_ip((ipfw_insn_ip *)cmd, av); 2476 if (cmd->opcode == O_IP_DST_SET) /* set */ 2477 ; 2478 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2479 cmd->opcode = O_IP_DST_ME; 2480 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2481 cmd->opcode = O_IP_DST; 2482 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2483 cmd->opcode = O_IP_DST_MASK; 2484 return cmd; 2485 } 2486 2487 static ipfw_insn * 2488 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2489 { 2490 if (!strncmp(av, "any", strlen(av))) { 2491 return NULL; 2492 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2493 /* XXX todo: check that we have a protocol with ports */ 2494 cmd->opcode = opcode; 2495 return cmd; 2496 } 2497 return NULL; 2498 } 2499 2500 /* 2501 * Parse arguments and assemble the microinstructions which make up a rule. 2502 * Rules are added into the 'rulebuf' and then copied in the correct order 2503 * into the actual rule. 2504 * 2505 * The syntax for a rule starts with the action, followed by an 2506 * optional log action, and the various match patterns. 2507 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2508 * (generated if the rule includes a keep-state option), then the 2509 * various match patterns, the "log" action, and the actual action. 2510 * 2511 */ 2512 static void 2513 add(int ac, char *av[]) 2514 { 2515 /* 2516 * rules are added into the 'rulebuf' and then copied in 2517 * the correct order into the actual rule. 2518 * Some things that need to go out of order (prob, action etc.) 2519 * go into actbuf[]. 2520 */ 2521 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2522 2523 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2524 ipfw_insn *first_cmd; /* first match pattern */ 2525 2526 struct ip_fw *rule; 2527 2528 /* 2529 * various flags used to record that we entered some fields. 2530 */ 2531 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2532 2533 int i; 2534 2535 int open_par = 0; /* open parenthesis ( */ 2536 2537 /* proto is here because it is used to fetch ports */ 2538 u_char proto = IPPROTO_IP; /* default protocol */ 2539 2540 double match_prob = 1; /* match probability, default is always match */ 2541 2542 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2543 bzero(cmdbuf, sizeof(cmdbuf)); 2544 bzero(rulebuf, sizeof(rulebuf)); 2545 2546 rule = (struct ip_fw *)rulebuf; 2547 cmd = (ipfw_insn *)cmdbuf; 2548 action = (ipfw_insn *)actbuf; 2549 2550 av++; ac--; 2551 2552 /* [rule N] -- Rule number optional */ 2553 if (ac && isdigit(**av)) { 2554 rule->rulenum = atoi(*av); 2555 av++; 2556 ac--; 2557 } 2558 2559 /* [set N] -- set number (0..30), optional */ 2560 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2561 int set = strtoul(av[1], NULL, 10); 2562 if (set < 0 || set > 30) 2563 errx(EX_DATAERR, "illegal set %s", av[1]); 2564 rule->set = set; 2565 av += 2; ac -= 2; 2566 } 2567 2568 /* [prob D] -- match probability, optional */ 2569 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2570 match_prob = strtod(av[1], NULL); 2571 2572 if (match_prob <= 0 || match_prob > 1) 2573 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2574 av += 2; ac -= 2; 2575 } 2576 2577 /* action -- mandatory */ 2578 NEED1("missing action"); 2579 i = match_token(rule_actions, *av); 2580 ac--; av++; 2581 action->len = 1; /* default */ 2582 switch(i) { 2583 case TOK_CHECKSTATE: 2584 have_state = action; 2585 action->opcode = O_CHECK_STATE; 2586 break; 2587 2588 case TOK_ACCEPT: 2589 action->opcode = O_ACCEPT; 2590 break; 2591 2592 case TOK_DENY: 2593 action->opcode = O_DENY; 2594 action->arg1 = 0; 2595 break; 2596 2597 case TOK_REJECT: 2598 action->opcode = O_REJECT; 2599 action->arg1 = ICMP_UNREACH_HOST; 2600 break; 2601 2602 case TOK_RESET: 2603 action->opcode = O_REJECT; 2604 action->arg1 = ICMP_REJECT_RST; 2605 break; 2606 2607 case TOK_UNREACH: 2608 action->opcode = O_REJECT; 2609 NEED1("missing reject code"); 2610 fill_reject_code(&action->arg1, *av); 2611 ac--; av++; 2612 break; 2613 2614 case TOK_COUNT: 2615 action->opcode = O_COUNT; 2616 break; 2617 2618 case TOK_QUEUE: 2619 case TOK_PIPE: 2620 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2621 case TOK_SKIPTO: 2622 if (i == TOK_QUEUE) 2623 action->opcode = O_QUEUE; 2624 else if (i == TOK_PIPE) 2625 action->opcode = O_PIPE; 2626 else if (i == TOK_SKIPTO) 2627 action->opcode = O_SKIPTO; 2628 NEED1("missing skipto/pipe/queue number"); 2629 action->arg1 = strtoul(*av, NULL, 10); 2630 av++; ac--; 2631 break; 2632 2633 case TOK_DIVERT: 2634 case TOK_TEE: 2635 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2636 NEED1("missing divert/tee port"); 2637 action->arg1 = strtoul(*av, NULL, 0); 2638 if (action->arg1 == 0) { 2639 struct servent *s; 2640 setservent(1); 2641 s = getservbyname(av[0], "divert"); 2642 if (s != NULL) 2643 action->arg1 = ntohs(s->s_port); 2644 else 2645 errx(EX_DATAERR, "illegal divert/tee port"); 2646 } 2647 ac--; av++; 2648 break; 2649 2650 case TOK_FORWARD: { 2651 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2652 char *s, *end; 2653 2654 NEED1("missing forward address[:port]"); 2655 2656 action->opcode = O_FORWARD_IP; 2657 action->len = F_INSN_SIZE(ipfw_insn_sa); 2658 2659 p->sa.sin_len = sizeof(struct sockaddr_in); 2660 p->sa.sin_family = AF_INET; 2661 p->sa.sin_port = 0; 2662 /* 2663 * locate the address-port separator (':' or ',') 2664 */ 2665 s = strchr(*av, ':'); 2666 if (s == NULL) 2667 s = strchr(*av, ','); 2668 if (s != NULL) { 2669 *(s++) = '\0'; 2670 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2671 if (s == end) 2672 errx(EX_DATAERR, 2673 "illegal forwarding port ``%s''", s); 2674 p->sa.sin_port = (u_short)i; 2675 } 2676 lookup_host(*av, &(p->sa.sin_addr)); 2677 } 2678 ac--; av++; 2679 break; 2680 2681 default: 2682 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2683 } 2684 action = next_cmd(action); 2685 2686 /* 2687 * [log [logamount N]] -- log, optional 2688 * 2689 * If exists, it goes first in the cmdbuf, but then it is 2690 * skipped in the copy section to the end of the buffer. 2691 */ 2692 if (ac && !strncmp(*av, "log", strlen(*av))) { 2693 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2694 2695 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2696 cmd->opcode = O_LOG; 2697 av++; ac--; 2698 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2699 ac--; av++; 2700 NEED1("logamount requires argument"); 2701 c->max_log = atoi(*av); 2702 if (c->max_log < 0) 2703 errx(EX_DATAERR, "logamount must be positive"); 2704 ac--; av++; 2705 } 2706 cmd = next_cmd(cmd); 2707 } 2708 2709 if (have_state) /* must be a check-state, we are done */ 2710 goto done; 2711 2712 #define OR_START(target) \ 2713 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2714 if (open_par) \ 2715 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2716 prev = NULL; \ 2717 open_par = 1; \ 2718 if ( (av[0])[1] == '\0') { \ 2719 ac--; av++; \ 2720 } else \ 2721 (*av)++; \ 2722 } \ 2723 target: \ 2724 2725 2726 #define CLOSE_PAR \ 2727 if (open_par) { \ 2728 if (ac && ( \ 2729 !strncmp(*av, ")", strlen(*av)) || \ 2730 !strncmp(*av, "}", strlen(*av)) )) { \ 2731 prev = NULL; \ 2732 open_par = 0; \ 2733 ac--; av++; \ 2734 } else \ 2735 errx(EX_USAGE, "missing \")\"\n"); \ 2736 } 2737 2738 #define NOT_BLOCK \ 2739 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2740 if (cmd->len & F_NOT) \ 2741 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2742 cmd->len |= F_NOT; \ 2743 ac--; av++; \ 2744 } 2745 2746 #define OR_BLOCK(target) \ 2747 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2748 if (prev == NULL || open_par == 0) \ 2749 errx(EX_DATAERR, "invalid OR block"); \ 2750 prev->len |= F_OR; \ 2751 ac--; av++; \ 2752 goto target; \ 2753 } \ 2754 CLOSE_PAR; 2755 2756 first_cmd = cmd; 2757 2758 #if 0 2759 /* 2760 * MAC addresses, optional. 2761 * If we have this, we skip the part "proto from src to dst" 2762 * and jump straight to the option parsing. 2763 */ 2764 NOT_BLOCK; 2765 NEED1("missing protocol"); 2766 if (!strncmp(*av, "MAC", strlen(*av)) || 2767 !strncmp(*av, "mac", strlen(*av))) { 2768 ac--; av++; /* the "MAC" keyword */ 2769 add_mac(cmd, ac, av); /* exits in case of errors */ 2770 cmd = next_cmd(cmd); 2771 ac -= 2; av += 2; /* dst-mac and src-mac */ 2772 NOT_BLOCK; 2773 NEED1("missing mac type"); 2774 if (add_mactype(cmd, ac, av[0])) 2775 cmd = next_cmd(cmd); 2776 ac--; av++; /* any or mac-type */ 2777 goto read_options; 2778 } 2779 #endif 2780 2781 /* 2782 * protocol, mandatory 2783 */ 2784 OR_START(get_proto); 2785 NOT_BLOCK; 2786 NEED1("missing protocol"); 2787 if (add_proto(cmd, *av)) { 2788 av++; ac--; 2789 if (F_LEN(cmd) == 0) /* plain IP */ 2790 proto = 0; 2791 else { 2792 proto = cmd->arg1; 2793 prev = cmd; 2794 cmd = next_cmd(cmd); 2795 } 2796 } else if (first_cmd != cmd) { 2797 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2798 } else 2799 goto read_options; 2800 OR_BLOCK(get_proto); 2801 2802 /* 2803 * "from", mandatory 2804 */ 2805 if (!ac || strncmp(*av, "from", strlen(*av))) 2806 errx(EX_USAGE, "missing ``from''"); 2807 ac--; av++; 2808 2809 /* 2810 * source IP, mandatory 2811 */ 2812 OR_START(source_ip); 2813 NOT_BLOCK; /* optional "not" */ 2814 NEED1("missing source address"); 2815 if (add_srcip(cmd, *av)) { 2816 ac--; av++; 2817 if (F_LEN(cmd) != 0) { /* ! any */ 2818 prev = cmd; 2819 cmd = next_cmd(cmd); 2820 } 2821 } 2822 OR_BLOCK(source_ip); 2823 2824 /* 2825 * source ports, optional 2826 */ 2827 NOT_BLOCK; /* optional "not" */ 2828 if (ac) { 2829 if (!strncmp(*av, "any", strlen(*av)) || 2830 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2831 ac--; av++; 2832 if (F_LEN(cmd) != 0) 2833 cmd = next_cmd(cmd); 2834 } 2835 } 2836 2837 /* 2838 * "to", mandatory 2839 */ 2840 if (!ac || strncmp(*av, "to", strlen(*av))) 2841 errx(EX_USAGE, "missing ``to''"); 2842 av++; ac--; 2843 2844 /* 2845 * destination, mandatory 2846 */ 2847 OR_START(dest_ip); 2848 NOT_BLOCK; /* optional "not" */ 2849 NEED1("missing dst address"); 2850 if (add_dstip(cmd, *av)) { 2851 ac--; av++; 2852 if (F_LEN(cmd) != 0) { /* ! any */ 2853 prev = cmd; 2854 cmd = next_cmd(cmd); 2855 } 2856 } 2857 OR_BLOCK(dest_ip); 2858 2859 /* 2860 * dest. ports, optional 2861 */ 2862 NOT_BLOCK; /* optional "not" */ 2863 if (ac) { 2864 if (!strncmp(*av, "any", strlen(*av)) || 2865 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2866 ac--; av++; 2867 if (F_LEN(cmd) != 0) 2868 cmd = next_cmd(cmd); 2869 } 2870 } 2871 2872 read_options: 2873 if (ac && first_cmd == cmd) { 2874 /* 2875 * nothing specified so far, store in the rule to ease 2876 * printout later. 2877 */ 2878 rule->_pad = 1; 2879 } 2880 prev = NULL; 2881 while (ac) { 2882 char *s; 2883 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2884 2885 s = *av; 2886 cmd32 = (ipfw_insn_u32 *)cmd; 2887 2888 if (*s == '!') { /* alternate syntax for NOT */ 2889 if (cmd->len & F_NOT) 2890 errx(EX_USAGE, "double \"not\" not allowed\n"); 2891 cmd->len = F_NOT; 2892 s++; 2893 } 2894 i = match_token(rule_options, s); 2895 ac--; av++; 2896 switch(i) { 2897 case TOK_NOT: 2898 if (cmd->len & F_NOT) 2899 errx(EX_USAGE, "double \"not\" not allowed\n"); 2900 cmd->len = F_NOT; 2901 break; 2902 2903 case TOK_OR: 2904 if (open_par == 0 || prev == NULL) 2905 errx(EX_USAGE, "invalid \"or\" block\n"); 2906 prev->len |= F_OR; 2907 break; 2908 2909 case TOK_STARTBRACE: 2910 if (open_par) 2911 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2912 open_par = 1; 2913 break; 2914 2915 case TOK_ENDBRACE: 2916 if (!open_par) 2917 errx(EX_USAGE, "+missing \")\"\n"); 2918 open_par = 0; 2919 prev = NULL; 2920 break; 2921 2922 case TOK_IN: 2923 fill_cmd(cmd, O_IN, 0, 0); 2924 break; 2925 2926 case TOK_OUT: 2927 cmd->len ^= F_NOT; /* toggle F_NOT */ 2928 fill_cmd(cmd, O_IN, 0, 0); 2929 break; 2930 2931 case TOK_FRAG: 2932 fill_cmd(cmd, O_FRAG, 0, 0); 2933 break; 2934 2935 case TOK_LAYER2: 2936 fill_cmd(cmd, O_LAYER2, 0, 0); 2937 break; 2938 2939 case TOK_XMIT: 2940 case TOK_RECV: 2941 case TOK_VIA: 2942 NEED1("recv, xmit, via require interface name" 2943 " or address"); 2944 fill_iface((ipfw_insn_if *)cmd, av[0]); 2945 ac--; av++; 2946 if (F_LEN(cmd) == 0) /* not a valid address */ 2947 break; 2948 if (i == TOK_XMIT) 2949 cmd->opcode = O_XMIT; 2950 else if (i == TOK_RECV) 2951 cmd->opcode = O_RECV; 2952 else if (i == TOK_VIA) 2953 cmd->opcode = O_VIA; 2954 break; 2955 2956 case TOK_ICMPTYPES: 2957 NEED1("icmptypes requires list of types"); 2958 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 2959 av++; ac--; 2960 break; 2961 2962 case TOK_IPTTL: 2963 NEED1("ipttl requires TTL"); 2964 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 2965 ac--; av++; 2966 break; 2967 2968 case TOK_IPID: 2969 NEED1("ipid requires length"); 2970 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 2971 ac--; av++; 2972 break; 2973 2974 case TOK_IPLEN: 2975 NEED1("iplen requires length"); 2976 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 2977 ac--; av++; 2978 break; 2979 2980 case TOK_IPVER: 2981 NEED1("ipver requires version"); 2982 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 2983 ac--; av++; 2984 break; 2985 2986 case TOK_IPPRECEDENCE: 2987 NEED1("ipprecedence requires value"); 2988 fill_cmd(cmd, O_IPPRECEDENCE, 0, 2989 (strtoul(*av, NULL, 0) & 7) << 5); 2990 ac--; av++; 2991 break; 2992 2993 case TOK_IPOPTS: 2994 NEED1("missing argument for ipoptions"); 2995 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 2996 ac--; av++; 2997 break; 2998 2999 case TOK_IPTOS: 3000 NEED1("missing argument for iptos"); 3001 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3002 ac--; av++; 3003 break; 3004 3005 case TOK_UID: 3006 NEED1("uid requires argument"); 3007 { 3008 char *end; 3009 uid_t uid; 3010 struct passwd *pwd; 3011 3012 cmd->opcode = O_UID; 3013 uid = strtoul(*av, &end, 0); 3014 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3015 if (pwd == NULL) 3016 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3017 cmd32->d[0] = pwd->pw_uid; 3018 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3019 ac--; av++; 3020 } 3021 break; 3022 3023 case TOK_GID: 3024 NEED1("gid requires argument"); 3025 { 3026 char *end; 3027 gid_t gid; 3028 struct group *grp; 3029 3030 cmd->opcode = O_GID; 3031 gid = strtoul(*av, &end, 0); 3032 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3033 if (grp == NULL) 3034 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3035 cmd32->d[0] = grp->gr_gid; 3036 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3037 ac--; av++; 3038 } 3039 break; 3040 3041 case TOK_ESTAB: 3042 fill_cmd(cmd, O_ESTAB, 0, 0); 3043 break; 3044 3045 case TOK_SETUP: 3046 fill_cmd(cmd, O_TCPFLAGS, 0, 3047 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3048 break; 3049 3050 case TOK_TCPOPTS: 3051 NEED1("missing argument for tcpoptions"); 3052 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3053 ac--; av++; 3054 break; 3055 3056 case TOK_TCPSEQ: 3057 case TOK_TCPACK: 3058 NEED1("tcpseq/tcpack requires argument"); 3059 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3060 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3061 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3062 ac--; av++; 3063 break; 3064 3065 case TOK_TCPWIN: 3066 NEED1("tcpwin requires length"); 3067 fill_cmd(cmd, O_TCPWIN, 0, 3068 htons(strtoul(*av, NULL, 0))); 3069 ac--; av++; 3070 break; 3071 3072 case TOK_TCPFLAGS: 3073 NEED1("missing argument for tcpflags"); 3074 cmd->opcode = O_TCPFLAGS; 3075 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3076 ac--; av++; 3077 break; 3078 3079 case TOK_KEEPSTATE: 3080 if (open_par) 3081 errx(EX_USAGE, "keep-state cannot be part " 3082 "of an or block"); 3083 if (have_state) 3084 errx(EX_USAGE, "only one of keep-state " 3085 "and limit is allowed"); 3086 have_state = cmd; 3087 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3088 break; 3089 3090 case TOK_LIMIT: 3091 if (open_par) 3092 errx(EX_USAGE, "limit cannot be part " 3093 "of an or block"); 3094 if (have_state) 3095 errx(EX_USAGE, "only one of keep-state " 3096 "and limit is allowed"); 3097 NEED1("limit needs mask and # of connections"); 3098 have_state = cmd; 3099 { 3100 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3101 3102 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3103 cmd->opcode = O_LIMIT; 3104 c->limit_mask = 0; 3105 c->conn_limit = 0; 3106 for (; ac >1 ;) { 3107 int val; 3108 3109 val = match_token(limit_masks, *av); 3110 if (val <= 0) 3111 break; 3112 c->limit_mask |= val; 3113 ac--; av++; 3114 } 3115 c->conn_limit = atoi(*av); 3116 if (c->conn_limit == 0) 3117 errx(EX_USAGE, "limit: limit must be >0"); 3118 if (c->limit_mask == 0) 3119 errx(EX_USAGE, "missing limit mask"); 3120 ac--; av++; 3121 } 3122 break; 3123 3124 case TOK_PROTO: 3125 NEED1("missing protocol"); 3126 if (add_proto(cmd, *av)) { 3127 proto = cmd->arg1; 3128 ac--; av++; 3129 } else 3130 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3131 break; 3132 3133 case TOK_SRCIP: 3134 NEED1("missing source IP"); 3135 if (add_srcip(cmd, *av)) { 3136 ac--; av++; 3137 } 3138 break; 3139 3140 case TOK_DSTIP: 3141 NEED1("missing destination IP"); 3142 if (add_dstip(cmd, *av)) { 3143 ac--; av++; 3144 } 3145 break; 3146 3147 case TOK_SRCPORT: 3148 NEED1("missing source port"); 3149 if (!strncmp(*av, "any", strlen(*av)) || 3150 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3151 ac--; av++; 3152 } else 3153 errx(EX_DATAERR, "invalid source port %s", *av); 3154 break; 3155 3156 case TOK_DSTPORT: 3157 NEED1("missing destination port"); 3158 if (!strncmp(*av, "any", strlen(*av)) || 3159 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3160 ac--; av++; 3161 } else 3162 errx(EX_DATAERR, "invalid destination port %s", 3163 *av); 3164 break; 3165 3166 case TOK_MAC: 3167 if (ac < 2) 3168 errx(EX_USAGE, "MAC dst-mac src-mac"); 3169 if (add_mac(cmd, ac, av)) { 3170 ac -= 2; av += 2; 3171 } 3172 break; 3173 3174 case TOK_MACTYPE: 3175 NEED1("missing mac type"); 3176 if (!add_mactype(cmd, ac, *av)) 3177 errx(EX_DATAERR, "invalid mac type %s", *av); 3178 ac--; av++; 3179 break; 3180 3181 default: 3182 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3183 } 3184 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3185 prev = cmd; 3186 cmd = next_cmd(cmd); 3187 } 3188 } 3189 3190 done: 3191 /* 3192 * Now copy stuff into the rule. 3193 * If we have a keep-state option, the first instruction 3194 * must be a PROBE_STATE (which is generated here). 3195 * If we have a LOG option, it was stored as the first command, 3196 * and now must be moved to the top of the action part. 3197 */ 3198 dst = (ipfw_insn *)rule->cmd; 3199 3200 /* 3201 * First thing to write into the command stream is the match probability. 3202 */ 3203 if (match_prob != 1) { /* 1 means always match */ 3204 dst->opcode = O_PROB; 3205 dst->len = 2; 3206 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3207 dst += dst->len; 3208 } 3209 3210 /* 3211 * generate O_PROBE_STATE if necessary 3212 */ 3213 if (have_state && have_state->opcode != O_CHECK_STATE) { 3214 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3215 dst = next_cmd(dst); 3216 } 3217 /* 3218 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3219 */ 3220 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3221 i = F_LEN(src); 3222 3223 switch (src->opcode) { 3224 case O_LOG: 3225 case O_KEEP_STATE: 3226 case O_LIMIT: 3227 break; 3228 default: 3229 bcopy(src, dst, i * sizeof(u_int32_t)); 3230 dst += i; 3231 } 3232 } 3233 3234 /* 3235 * put back the have_state command as last opcode 3236 */ 3237 if (have_state && have_state->opcode != O_CHECK_STATE) { 3238 i = F_LEN(have_state); 3239 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3240 dst += i; 3241 } 3242 /* 3243 * start action section 3244 */ 3245 rule->act_ofs = dst - rule->cmd; 3246 3247 /* 3248 * put back O_LOG if necessary 3249 */ 3250 src = (ipfw_insn *)cmdbuf; 3251 if ( src->opcode == O_LOG ) { 3252 i = F_LEN(src); 3253 bcopy(src, dst, i * sizeof(u_int32_t)); 3254 dst += i; 3255 } 3256 /* 3257 * copy all other actions 3258 */ 3259 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3260 i = F_LEN(src); 3261 bcopy(src, dst, i * sizeof(u_int32_t)); 3262 dst += i; 3263 } 3264 3265 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3266 i = (void *)dst - (void *)rule; 3267 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3268 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3269 if (!do_quiet) 3270 show_ipfw(rule, 10, 10); 3271 } 3272 3273 static void 3274 zero(int ac, char *av[]) 3275 { 3276 int rulenum; 3277 int failed = EX_OK; 3278 3279 av++; ac--; 3280 3281 if (!ac) { 3282 /* clear all entries */ 3283 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3284 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3285 if (!do_quiet) 3286 printf("Accounting cleared.\n"); 3287 3288 return; 3289 } 3290 3291 while (ac) { 3292 /* Rule number */ 3293 if (isdigit(**av)) { 3294 rulenum = atoi(*av); 3295 av++; 3296 ac--; 3297 if (setsockopt(s, IPPROTO_IP, 3298 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3299 warn("rule %u: setsockopt(IP_FW_ZERO)", 3300 rulenum); 3301 failed = EX_UNAVAILABLE; 3302 } else if (!do_quiet) 3303 printf("Entry %d cleared\n", rulenum); 3304 } else { 3305 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3306 } 3307 } 3308 if (failed != EX_OK) 3309 exit(failed); 3310 } 3311 3312 static void 3313 resetlog(int ac, char *av[]) 3314 { 3315 int rulenum; 3316 int failed = EX_OK; 3317 3318 av++; ac--; 3319 3320 if (!ac) { 3321 /* clear all entries */ 3322 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3323 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3324 if (!do_quiet) 3325 printf("Logging counts reset.\n"); 3326 3327 return; 3328 } 3329 3330 while (ac) { 3331 /* Rule number */ 3332 if (isdigit(**av)) { 3333 rulenum = atoi(*av); 3334 av++; 3335 ac--; 3336 if (setsockopt(s, IPPROTO_IP, 3337 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3338 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3339 rulenum); 3340 failed = EX_UNAVAILABLE; 3341 } else if (!do_quiet) 3342 printf("Entry %d logging count reset\n", 3343 rulenum); 3344 } else { 3345 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3346 } 3347 } 3348 if (failed != EX_OK) 3349 exit(failed); 3350 } 3351 3352 static void 3353 flush(void) 3354 { 3355 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3356 3357 if (!do_force && !do_quiet) { /* need to ask user */ 3358 int c; 3359 3360 printf("Are you sure? [yn] "); 3361 fflush(stdout); 3362 do { 3363 c = toupper(getc(stdin)); 3364 while (c != '\n' && getc(stdin) != '\n') 3365 if (feof(stdin)) 3366 return; /* and do not flush */ 3367 } while (c != 'Y' && c != 'N'); 3368 printf("\n"); 3369 if (c == 'N') /* user said no */ 3370 return; 3371 } 3372 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3373 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3374 do_pipe ? "DUMMYNET" : "FW"); 3375 if (!do_quiet) 3376 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3377 } 3378 3379 static int 3380 ipfw_main(int ac, char **av) 3381 { 3382 int ch; 3383 3384 if (ac == 1) 3385 show_usage(); 3386 3387 /* Set the force flag for non-interactive processes */ 3388 do_force = !isatty(STDIN_FILENO); 3389 3390 optind = optreset = 1; 3391 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3392 switch (ch) { 3393 case 'h': /* help */ 3394 help(); 3395 break; /* NOTREACHED */ 3396 3397 case 's': /* sort */ 3398 do_sort = atoi(optarg); 3399 break; 3400 case 'a': 3401 do_acct = 1; 3402 break; 3403 case 'c': 3404 do_compact = 1; 3405 break; 3406 case 'd': 3407 do_dynamic = 1; 3408 break; 3409 case 'e': 3410 do_expired = 1; 3411 break; 3412 case 'f': 3413 do_force = 1; 3414 break; 3415 case 'N': 3416 do_resolv = 1; 3417 break; 3418 case 'q': 3419 do_quiet = 1; 3420 break; 3421 case 'S': 3422 show_sets = 1; 3423 break; 3424 case 't': 3425 do_time = 1; 3426 break; 3427 case 'v': /* verbose */ 3428 verbose++; 3429 break; 3430 default: 3431 show_usage(); 3432 } 3433 3434 ac -= optind; 3435 av += optind; 3436 NEED1("bad arguments, for usage summary ``ipfw''"); 3437 3438 /* 3439 * optional: pipe or queue 3440 */ 3441 if (!strncmp(*av, "pipe", strlen(*av))) { 3442 do_pipe = 1; 3443 ac--; 3444 av++; 3445 } else if (!strncmp(*av, "queue", strlen(*av))) { 3446 do_pipe = 2; 3447 ac--; 3448 av++; 3449 } 3450 NEED1("missing command"); 3451 3452 /* 3453 * for pipes and queues we normally say 'pipe NN config' 3454 * but the code is easier to parse as 'pipe config NN' 3455 * so we swap the two arguments. 3456 */ 3457 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3458 char *p = av[0]; 3459 av[0] = av[1]; 3460 av[1] = p; 3461 } 3462 if (!strncmp(*av, "add", strlen(*av))) 3463 add(ac, av); 3464 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3465 config_pipe(ac, av); 3466 else if (!strncmp(*av, "delete", strlen(*av))) 3467 delete(ac, av); 3468 else if (!strncmp(*av, "flush", strlen(*av))) 3469 flush(); 3470 else if (!strncmp(*av, "zero", strlen(*av))) 3471 zero(ac, av); 3472 else if (!strncmp(*av, "resetlog", strlen(*av))) 3473 resetlog(ac, av); 3474 else if (!strncmp(*av, "print", strlen(*av)) || 3475 !strncmp(*av, "list", strlen(*av))) 3476 list(ac, av); 3477 else if (!strncmp(*av, "enable", strlen(*av))) 3478 sysctl_handler(ac, av, 1); 3479 else if (!strncmp(*av, "disable", strlen(*av))) 3480 sysctl_handler(ac, av, 0); 3481 else if (!strncmp(*av, "set", strlen(*av))) 3482 sets_handler(ac, av); 3483 else if (!strncmp(*av, "show", strlen(*av))) { 3484 do_acct++; 3485 list(ac, av); 3486 } else 3487 errx(EX_USAGE, "bad command `%s'", *av); 3488 return 0; 3489 } 3490 3491 3492 static void 3493 ipfw_readfile(int ac, char *av[]) 3494 { 3495 #define MAX_ARGS 32 3496 #define WHITESP " \t\f\v\n\r" 3497 char buf[BUFSIZ]; 3498 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3499 char linename[10]; 3500 int i=0, lineno=0, qflag=0, pflag=0, status; 3501 FILE *f = NULL; 3502 pid_t preproc = 0; 3503 int c; 3504 3505 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 3506 switch(c) { 3507 case 'D': 3508 if (!pflag) 3509 errx(EX_USAGE, "-D requires -p"); 3510 if (i > MAX_ARGS - 2) 3511 errx(EX_USAGE, 3512 "too many -D or -U options"); 3513 args[i++] = "-D"; 3514 args[i++] = optarg; 3515 break; 3516 3517 case 'U': 3518 if (!pflag) 3519 errx(EX_USAGE, "-U requires -p"); 3520 if (i > MAX_ARGS - 2) 3521 errx(EX_USAGE, 3522 "too many -D or -U options"); 3523 args[i++] = "-U"; 3524 args[i++] = optarg; 3525 break; 3526 3527 case 'p': 3528 pflag = 1; 3529 cmd = optarg; 3530 args[0] = cmd; 3531 i = 1; 3532 break; 3533 3534 case 'q': 3535 qflag = 1; 3536 break; 3537 3538 default: 3539 errx(EX_USAGE, "bad arguments, for usage" 3540 " summary ``ipfw''"); 3541 } 3542 3543 av += optind; 3544 ac -= optind; 3545 if (ac != 1) 3546 errx(EX_USAGE, "extraneous filename arguments"); 3547 3548 if ((f = fopen(av[0], "r")) == NULL) 3549 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3550 3551 if (pflag) { 3552 /* pipe through preprocessor (cpp or m4) */ 3553 int pipedes[2]; 3554 3555 args[i] = 0; 3556 3557 if (pipe(pipedes) == -1) 3558 err(EX_OSERR, "cannot create pipe"); 3559 3560 switch((preproc = fork())) { 3561 case -1: 3562 err(EX_OSERR, "cannot fork"); 3563 3564 case 0: 3565 /* child */ 3566 if (dup2(fileno(f), 0) == -1 3567 || dup2(pipedes[1], 1) == -1) 3568 err(EX_OSERR, "dup2()"); 3569 fclose(f); 3570 close(pipedes[1]); 3571 close(pipedes[0]); 3572 execvp(cmd, args); 3573 err(EX_OSERR, "execvp(%s) failed", cmd); 3574 3575 default: 3576 /* parent */ 3577 fclose(f); 3578 close(pipedes[1]); 3579 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3580 int savederrno = errno; 3581 3582 kill(preproc, SIGTERM); 3583 errno = savederrno; 3584 err(EX_OSERR, "fdopen()"); 3585 } 3586 } 3587 } 3588 3589 while (fgets(buf, BUFSIZ, f)) { 3590 lineno++; 3591 sprintf(linename, "Line %d", lineno); 3592 args[0] = linename; 3593 3594 if (*buf == '#') 3595 continue; 3596 if ((p = strchr(buf, '#')) != NULL) 3597 *p = '\0'; 3598 i = 1; 3599 if (qflag) 3600 args[i++] = "-q"; 3601 for (a = strtok(buf, WHITESP); 3602 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3603 args[i] = a; 3604 if (i == (qflag? 2: 1)) 3605 continue; 3606 if (i == MAX_ARGS) 3607 errx(EX_USAGE, "%s: too many arguments", 3608 linename); 3609 args[i] = NULL; 3610 3611 ipfw_main(i, args); 3612 } 3613 fclose(f); 3614 if (pflag) { 3615 if (waitpid(preproc, &status, 0) == -1) 3616 errx(EX_OSERR, "waitpid()"); 3617 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3618 errx(EX_UNAVAILABLE, 3619 "preprocessor exited with status %d", 3620 WEXITSTATUS(status)); 3621 else if (WIFSIGNALED(status)) 3622 errx(EX_UNAVAILABLE, 3623 "preprocessor exited with signal %d", 3624 WTERMSIG(status)); 3625 } 3626 } 3627 3628 int 3629 main(int ac, char *av[]) 3630 { 3631 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3632 if (s < 0) 3633 err(EX_UNAVAILABLE, "socket"); 3634 3635 /* 3636 * If the last argument is an absolute pathname, interpret it 3637 * as a file to be preprocessed. 3638 */ 3639 3640 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3641 ipfw_readfile(ac, av); 3642 else 3643 ipfw_main(ac, av); 3644 return EX_OK; 3645 } 3646