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 1.12 2007/11/05 08:58:35 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 ipfw_ioc_rule *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 = rule->set_disable; 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->usr_flags & IPFW_USR_F_NORULE) { 950 /* empty rules before options */ 951 if (!do_compact) 952 printf(" ip from any to any"); 953 flags |= HAVE_IP | HAVE_OPTIONS; 954 } 955 956 for (l = rule->act_ofs, cmd = rule->cmd ; 957 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 958 /* useful alias */ 959 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 960 961 show_prerequisites(&flags, 0, cmd->opcode); 962 963 switch(cmd->opcode) { 964 case O_PROB: 965 break; /* done already */ 966 967 case O_PROBE_STATE: 968 break; /* no need to print anything here */ 969 970 case O_MACADDR2: { 971 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 972 973 if ((cmd->len & F_OR) && !or_block) 974 printf(" {"); 975 if (cmd->len & F_NOT) 976 printf(" not"); 977 printf(" MAC"); 978 flags |= HAVE_MAC; 979 print_mac( m->addr, m->mask); 980 print_mac( m->addr + 6, m->mask + 6); 981 } 982 break; 983 984 case O_MAC_TYPE: 985 if ((cmd->len & F_OR) && !or_block) 986 printf(" {"); 987 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 988 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 989 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 990 break; 991 992 case O_IP_SRC: 993 case O_IP_SRC_MASK: 994 case O_IP_SRC_ME: 995 case O_IP_SRC_SET: 996 show_prerequisites(&flags, HAVE_PROTO, 0); 997 if (!(flags & HAVE_SRCIP)) 998 printf(" from"); 999 if ((cmd->len & F_OR) && !or_block) 1000 printf(" {"); 1001 print_ip((ipfw_insn_ip *)cmd, 1002 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1003 flags |= HAVE_SRCIP; 1004 break; 1005 1006 case O_IP_DST: 1007 case O_IP_DST_MASK: 1008 case O_IP_DST_ME: 1009 case O_IP_DST_SET: 1010 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1011 if (!(flags & HAVE_DSTIP)) 1012 printf(" to"); 1013 if ((cmd->len & F_OR) && !or_block) 1014 printf(" {"); 1015 print_ip((ipfw_insn_ip *)cmd, 1016 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1017 flags |= HAVE_DSTIP; 1018 break; 1019 1020 case O_IP_DSTPORT: 1021 show_prerequisites(&flags, HAVE_IP, 0); 1022 case O_IP_SRCPORT: 1023 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1024 if ((cmd->len & F_OR) && !or_block) 1025 printf(" {"); 1026 print_newports((ipfw_insn_u16 *)cmd, proto, 1027 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1028 break; 1029 1030 case O_PROTO: { 1031 struct protoent *pe; 1032 1033 if ((cmd->len & F_OR) && !or_block) 1034 printf(" {"); 1035 if (cmd->len & F_NOT) 1036 printf(" not"); 1037 proto = cmd->arg1; 1038 pe = getprotobynumber(cmd->arg1); 1039 if (flags & HAVE_OPTIONS) 1040 printf(" proto"); 1041 if (pe) 1042 printf(" %s", pe->p_name); 1043 else 1044 printf(" %u", cmd->arg1); 1045 } 1046 flags |= HAVE_PROTO; 1047 break; 1048 1049 default: /*options ... */ 1050 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1051 if ((cmd->len & F_OR) && !or_block) 1052 printf(" {"); 1053 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1054 printf(" not"); 1055 switch(cmd->opcode) { 1056 case O_FRAG: 1057 printf(" frag"); 1058 break; 1059 1060 case O_IN: 1061 printf(cmd->len & F_NOT ? " out" : " in"); 1062 break; 1063 1064 case O_LAYER2: 1065 printf(" layer2"); 1066 break; 1067 case O_XMIT: 1068 case O_RECV: 1069 case O_VIA: { 1070 char *s; 1071 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1072 1073 if (cmd->opcode == O_XMIT) 1074 s = "xmit"; 1075 else if (cmd->opcode == O_RECV) 1076 s = "recv"; 1077 else if (cmd->opcode == O_VIA) 1078 s = "via"; 1079 else 1080 s = "?huh?"; 1081 if (cmdif->name[0] == '\0') 1082 printf(" %s %s", s, 1083 inet_ntoa(cmdif->p.ip)); 1084 printf(" %s %s", s, cmdif->name); 1085 } 1086 break; 1087 1088 case O_IPID: 1089 printf(" ipid %u", cmd->arg1 ); 1090 break; 1091 1092 case O_IPTTL: 1093 printf(" ipttl %u", cmd->arg1 ); 1094 break; 1095 1096 case O_IPVER: 1097 printf(" ipver %u", cmd->arg1 ); 1098 break; 1099 1100 case O_IPPRECEDENCE: 1101 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1102 break; 1103 1104 case O_IPLEN: 1105 printf(" iplen %u", cmd->arg1 ); 1106 break; 1107 1108 case O_IPOPT: 1109 print_flags("ipoptions", cmd, f_ipopts); 1110 break; 1111 1112 case O_IPTOS: 1113 print_flags("iptos", cmd, f_iptos); 1114 break; 1115 1116 case O_ICMPTYPE: 1117 print_icmptypes((ipfw_insn_u32 *)cmd); 1118 break; 1119 1120 case O_ESTAB: 1121 printf(" established"); 1122 break; 1123 1124 case O_TCPFLAGS: 1125 print_flags("tcpflags", cmd, f_tcpflags); 1126 break; 1127 1128 case O_TCPOPTS: 1129 print_flags("tcpoptions", cmd, f_tcpopts); 1130 break; 1131 1132 case O_TCPWIN: 1133 printf(" tcpwin %d", ntohs(cmd->arg1)); 1134 break; 1135 1136 case O_TCPACK: 1137 printf(" tcpack %ld", ntohl(cmd32->d[0])); 1138 break; 1139 1140 case O_TCPSEQ: 1141 printf(" tcpseq %ld", ntohl(cmd32->d[0])); 1142 break; 1143 1144 case O_UID: 1145 { 1146 struct passwd *pwd = getpwuid(cmd32->d[0]); 1147 1148 if (pwd) 1149 printf(" uid %s", pwd->pw_name); 1150 else 1151 printf(" uid %u", cmd32->d[0]); 1152 } 1153 break; 1154 1155 case O_GID: 1156 { 1157 struct group *grp = getgrgid(cmd32->d[0]); 1158 1159 if (grp) 1160 printf(" gid %s", grp->gr_name); 1161 else 1162 printf(" gid %u", cmd32->d[0]); 1163 } 1164 break; 1165 1166 case O_KEEP_STATE: 1167 printf(" keep-state"); 1168 break; 1169 1170 case O_LIMIT: 1171 { 1172 struct _s_x *p = limit_masks; 1173 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1174 u_int8_t x = c->limit_mask; 1175 char *comma = " "; 1176 1177 printf(" limit"); 1178 for ( ; p->x != 0 ; p++) 1179 if ((x & p->x) == p->x) { 1180 x &= ~p->x; 1181 printf("%s%s", comma, p->s); 1182 comma = ","; 1183 } 1184 printf(" %d", c->conn_limit); 1185 } 1186 break; 1187 1188 default: 1189 printf(" [opcode %d len %d]", 1190 cmd->opcode, cmd->len); 1191 } 1192 } 1193 if (cmd->len & F_OR) { 1194 printf(" or"); 1195 or_block = 1; 1196 } else if (or_block) { 1197 printf(" }"); 1198 or_block = 0; 1199 } 1200 } 1201 show_prerequisites(&flags, HAVE_IP, 0); 1202 1203 printf("\n"); 1204 } 1205 1206 static void 1207 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth) 1208 { 1209 struct protoent *pe; 1210 struct in_addr a; 1211 1212 if (!do_expired) { 1213 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1214 return; 1215 } 1216 1217 printf("%05u %*llu %*llu (%ds)", d->rulenum, pcwidth, d->pcnt, 1218 bcwidth, d->bcnt, d->expire); 1219 switch (d->dyn_type) { 1220 case O_LIMIT_PARENT: 1221 printf(" PARENT %d", d->count); 1222 break; 1223 case O_LIMIT: 1224 printf(" LIMIT"); 1225 break; 1226 case O_KEEP_STATE: /* bidir, no mask */ 1227 printf(" STATE"); 1228 break; 1229 } 1230 1231 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL) 1232 printf(" %s", pe->p_name); 1233 else 1234 printf(" proto %u", d->id.u.ip.proto); 1235 1236 a.s_addr = htonl(d->id.u.ip.src_ip); 1237 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port); 1238 1239 a.s_addr = htonl(d->id.u.ip.dst_ip); 1240 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port); 1241 printf("\n"); 1242 } 1243 1244 int 1245 sort_q(const void *pa, const void *pb) 1246 { 1247 int rev = (do_sort < 0); 1248 int field = rev ? -do_sort : do_sort; 1249 long long res = 0; 1250 const struct dn_ioc_flowqueue *a = pa; 1251 const struct dn_ioc_flowqueue *b = pb; 1252 1253 switch (field) { 1254 case 1: /* pkts */ 1255 res = a->len - b->len; 1256 break; 1257 case 2: /* bytes */ 1258 res = a->len_bytes - b->len_bytes; 1259 break; 1260 1261 case 3: /* tot pkts */ 1262 res = a->tot_pkts - b->tot_pkts; 1263 break; 1264 1265 case 4: /* tot bytes */ 1266 res = a->tot_bytes - b->tot_bytes; 1267 break; 1268 } 1269 if (res < 0) 1270 res = -1; 1271 if (res > 0) 1272 res = 1; 1273 return (int)(rev ? res : -res); 1274 } 1275 1276 static void 1277 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) 1278 { 1279 int l; 1280 1281 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1282 fs->flow_mask.u.ip.proto, 1283 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, 1284 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); 1285 if (fs->rq_elements == 0) 1286 return; 1287 1288 printf("BKT Prot ___Source IP/port____ " 1289 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1290 if (do_sort != 0) 1291 heapsort(q, fs->rq_elements, sizeof(*q), sort_q); 1292 for (l = 0; l < fs->rq_elements; l++) { 1293 struct in_addr ina; 1294 struct protoent *pe; 1295 1296 ina.s_addr = htonl(q[l].id.u.ip.src_ip); 1297 printf("%3d ", q[l].hash_slot); 1298 pe = getprotobynumber(q[l].id.u.ip.proto); 1299 if (pe) 1300 printf("%-4s ", pe->p_name); 1301 else 1302 printf("%4u ", q[l].id.u.ip.proto); 1303 printf("%15s/%-5d ", 1304 inet_ntoa(ina), q[l].id.u.ip.src_port); 1305 ina.s_addr = htonl(q[l].id.u.ip.dst_ip); 1306 printf("%15s/%-5d ", 1307 inet_ntoa(ina), q[l].id.u.ip.dst_port); 1308 printf("%4qu %8qu %2u %4u %3u\n", 1309 q[l].tot_pkts, q[l].tot_bytes, 1310 q[l].len, q[l].len_bytes, q[l].drops); 1311 if (verbose) 1312 printf(" S %20qd F %20qd\n", 1313 q[l].S, q[l].F); 1314 } 1315 } 1316 1317 static void 1318 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) 1319 { 1320 int l; 1321 char qs[30]; 1322 char plr[30]; 1323 char red[90]; /* Display RED parameters */ 1324 1325 l = fs->qsize; 1326 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1327 if (l >= 8192) 1328 sprintf(qs, "%d KB", l / 1024); 1329 else 1330 sprintf(qs, "%d B", l); 1331 } else 1332 sprintf(qs, "%3d sl.", l); 1333 if (fs->plr) 1334 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1335 else 1336 plr[0] = '\0'; 1337 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1338 sprintf(red, 1339 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1340 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1341 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1342 SCALE_VAL(fs->min_th), 1343 SCALE_VAL(fs->max_th), 1344 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1345 else 1346 sprintf(red, "droptail"); 1347 1348 printf("%s %s%s %d queues (%d buckets) %s\n", 1349 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1350 } 1351 1352 static void 1353 list_pipes(void *data, int nbytes, int ac, char *av[]) 1354 { 1355 u_long rulenum; 1356 void *next = data; 1357 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; 1358 struct dn_ioc_flowset *fs; 1359 struct dn_ioc_flowqueue *q; 1360 int l; 1361 1362 if (ac > 0) 1363 rulenum = strtoul(*av++, NULL, 10); 1364 else 1365 rulenum = 0; 1366 for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) { 1367 double b = p->bandwidth; 1368 char buf[30]; 1369 char prefix[80]; 1370 1371 if (p->fs.fs_type != DN_IS_PIPE) 1372 break; /* done with pipes, now queues */ 1373 1374 /* 1375 * compute length, as pipe have variable size 1376 */ 1377 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1378 next = (void *)p + l; 1379 nbytes -= l; 1380 1381 if (rulenum != 0 && rulenum != p->pipe_nr) 1382 continue; 1383 1384 /* 1385 * Print rate 1386 */ 1387 if (b == 0) 1388 sprintf(buf, "unlimited"); 1389 else if (b >= 1000000) 1390 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1391 else if (b >= 1000) 1392 sprintf(buf, "%7.3f Kbit/s", b/1000); 1393 else 1394 sprintf(buf, "%7.3f bit/s ", b); 1395 1396 sprintf(prefix, "%05d: %s %4d ms ", 1397 p->pipe_nr, buf, p->delay); 1398 print_flowset_parms(&p->fs, prefix); 1399 if (verbose) 1400 printf(" V %20qd\n", p->V >> MY_M); 1401 1402 q = (struct dn_ioc_flowqueue *)(p+1); 1403 list_queues(&p->fs, q); 1404 } 1405 for (fs = next; nbytes >= sizeof(*fs); fs = next) { 1406 char prefix[80]; 1407 1408 if (fs->fs_type != DN_IS_QUEUE) 1409 break; 1410 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1411 next = (void *)fs + l; 1412 nbytes -= l; 1413 q = (struct dn_ioc_flowqueue *)(fs+1); 1414 sprintf(prefix, "q%05d: weight %d pipe %d ", 1415 fs->fs_nr, fs->weight, fs->parent_nr); 1416 print_flowset_parms(fs, prefix); 1417 list_queues(fs, q); 1418 } 1419 } 1420 1421 /* 1422 * This one handles all set-related commands 1423 * ipfw set { show | enable | disable } 1424 * ipfw set swap X Y 1425 * ipfw set move X to Y 1426 * ipfw set move rule X to Y 1427 */ 1428 static void 1429 sets_handler(int ac, char *av[]) 1430 { 1431 u_int32_t set_disable, masks[2]; 1432 int i, nbytes; 1433 u_int16_t rulenum; 1434 u_int8_t cmd, new_set; 1435 1436 ac--; 1437 av++; 1438 1439 if (!ac) 1440 errx(EX_USAGE, "set needs command"); 1441 if (!strncmp(*av, "show", strlen(*av)) ) { 1442 void *data; 1443 char *msg; 1444 1445 nbytes = sizeof(struct ipfw_ioc_rule); 1446 if ((data = malloc(nbytes)) == NULL) 1447 err(EX_OSERR, "malloc"); 1448 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1449 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1450 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable; 1451 1452 for (i = 0, msg = "disable" ; i < 31; i++) 1453 if ( (set_disable & (1<<i))) { 1454 printf("%s %d", msg, i); 1455 msg = ""; 1456 } 1457 msg = (set_disable) ? " enable" : "enable"; 1458 for (i = 0; i < 31; i++) 1459 if ( !(set_disable & (1<<i))) { 1460 printf("%s %d", msg, i); 1461 msg = ""; 1462 } 1463 printf("\n"); 1464 } else if (!strncmp(*av, "swap", strlen(*av))) { 1465 ac--; av++; 1466 if (ac != 2) 1467 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1468 rulenum = atoi(av[0]); 1469 new_set = atoi(av[1]); 1470 if (!isdigit(*(av[0])) || rulenum > 30) 1471 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1472 if (!isdigit(*(av[1])) || new_set > 30) 1473 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1474 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1475 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1476 masks, sizeof(u_int32_t)); 1477 } else if (!strncmp(*av, "move", strlen(*av))) { 1478 ac--; av++; 1479 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1480 cmd = 2; 1481 ac--; av++; 1482 } else 1483 cmd = 3; 1484 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1485 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1486 rulenum = atoi(av[0]); 1487 new_set = atoi(av[2]); 1488 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1489 (cmd == 2 && rulenum == 65535) ) 1490 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1491 if (!isdigit(*(av[2])) || new_set > 30) 1492 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1493 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1494 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1495 masks, sizeof(u_int32_t)); 1496 } else if (!strncmp(*av, "disable", strlen(*av)) || 1497 !strncmp(*av, "enable", strlen(*av)) ) { 1498 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1499 1500 ac--; av++; 1501 masks[0] = masks[1] = 0; 1502 1503 while (ac) { 1504 if (isdigit(**av)) { 1505 i = atoi(*av); 1506 if (i < 0 || i > 30) 1507 errx(EX_DATAERR, 1508 "invalid set number %d\n", i); 1509 masks[which] |= (1<<i); 1510 } else if (!strncmp(*av, "disable", strlen(*av))) 1511 which = 0; 1512 else if (!strncmp(*av, "enable", strlen(*av))) 1513 which = 1; 1514 else 1515 errx(EX_DATAERR, 1516 "invalid set command %s\n", *av); 1517 av++; ac--; 1518 } 1519 if ( (masks[0] & masks[1]) != 0 ) 1520 errx(EX_DATAERR, 1521 "cannot enable and disable the same set\n"); 1522 1523 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1524 if (i) 1525 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1526 } else 1527 errx(EX_USAGE, "invalid set command %s\n", *av); 1528 } 1529 1530 static void 1531 sysctl_handler(int ac, char *av[], int which) 1532 { 1533 ac--; 1534 av++; 1535 1536 if (*av == NULL) { 1537 warnx("missing keyword to enable/disable\n"); 1538 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1539 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1540 &which, sizeof(which)); 1541 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1542 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1543 &which, sizeof(which)); 1544 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1545 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1546 &which, sizeof(which)); 1547 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1548 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1549 &which, sizeof(which)); 1550 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1551 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1552 &which, sizeof(which)); 1553 } else { 1554 warnx("unrecognize enable/disable keyword: %s\n", *av); 1555 } 1556 } 1557 1558 static void 1559 list(int ac, char *av[]) 1560 { 1561 struct ipfw_ioc_rule *r; 1562 struct ipfw_ioc_state *dynrules, *d; 1563 1564 void *data = NULL; 1565 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1566 int exitval = EX_OK; 1567 int lac; 1568 char **lav; 1569 u_long rnum; 1570 char *endptr; 1571 int seen = 0; 1572 1573 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1574 int nalloc = 1024; /* start somewhere... */ 1575 1576 ac--; 1577 av++; 1578 1579 /* get rules or pipes from kernel, resizing array as necessary */ 1580 nbytes = nalloc; 1581 1582 while (nbytes >= nalloc) { 1583 nalloc = nalloc * 2 + 200; 1584 nbytes = nalloc; 1585 if ((data = realloc(data, nbytes)) == NULL) 1586 err(EX_OSERR, "realloc"); 1587 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1588 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1589 do_pipe ? "DUMMYNET" : "FW"); 1590 } 1591 1592 if (do_pipe) { 1593 list_pipes(data, nbytes, ac, av); 1594 goto done; 1595 } 1596 1597 /* 1598 * Count static rules. 1599 */ 1600 r = data; 1601 nstat = r->static_count; 1602 1603 /* 1604 * Count dynamic rules. This is easier as they have 1605 * fixed size. 1606 */ 1607 dynrules = (struct ipfw_ioc_state *)((void *)r + r->static_len); 1608 ndyn = (nbytes - r->static_len) / sizeof(*dynrules); 1609 1610 /* if showing stats, figure out column widths ahead of time */ 1611 bcwidth = pcwidth = 0; 1612 if (do_acct) { 1613 for (n = 0, r = data; n < nstat; 1614 n++, r = (void *)r + IOC_RULESIZE(r)) { 1615 /* packet counter */ 1616 width = snprintf(NULL, 0, "%llu", r->pcnt); 1617 if (width > pcwidth) 1618 pcwidth = width; 1619 1620 /* byte counter */ 1621 width = snprintf(NULL, 0, "%llu", r->bcnt); 1622 if (width > bcwidth) 1623 bcwidth = width; 1624 } 1625 } 1626 if (do_dynamic && ndyn) { 1627 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1628 width = snprintf(NULL, 0, "%llu", d->pcnt); 1629 if (width > pcwidth) 1630 pcwidth = width; 1631 1632 width = snprintf(NULL, 0, "%llu", d->bcnt); 1633 if (width > bcwidth) 1634 bcwidth = width; 1635 } 1636 } 1637 /* if no rule numbers were specified, list all rules */ 1638 if (ac == 0) { 1639 for (n = 0, r = data; n < nstat; 1640 n++, r = (void *)r + IOC_RULESIZE(r) ) 1641 show_ipfw(r, pcwidth, bcwidth); 1642 1643 if (do_dynamic && ndyn) { 1644 printf("## Dynamic rules (%d):\n", ndyn); 1645 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1646 show_dyn_ipfw(d, pcwidth, bcwidth); 1647 } 1648 goto done; 1649 } 1650 1651 /* display specific rules requested on command line */ 1652 1653 for (lac = ac, lav = av; lac != 0; lac--) { 1654 /* convert command line rule # */ 1655 rnum = strtoul(*lav++, &endptr, 10); 1656 if (*endptr) { 1657 exitval = EX_USAGE; 1658 warnx("invalid rule number: %s", *(lav - 1)); 1659 continue; 1660 } 1661 for (n = seen = 0, r = data; n < nstat; 1662 n++, r = (void *)r + IOC_RULESIZE(r) ) { 1663 if (r->rulenum > rnum) 1664 break; 1665 if (r->rulenum == rnum) { 1666 show_ipfw(r, pcwidth, bcwidth); 1667 seen = 1; 1668 } 1669 } 1670 if (!seen) { 1671 /* give precedence to other error(s) */ 1672 if (exitval == EX_OK) 1673 exitval = EX_UNAVAILABLE; 1674 warnx("rule %lu does not exist", rnum); 1675 } 1676 } 1677 1678 if (do_dynamic && ndyn) { 1679 printf("## Dynamic rules:\n"); 1680 for (lac = ac, lav = av; lac != 0; lac--) { 1681 rnum = strtoul(*lav++, &endptr, 10); 1682 if (*endptr) 1683 /* already warned */ 1684 continue; 1685 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1686 if (d->rulenum > rnum) 1687 break; 1688 if (d->rulenum == rnum) 1689 show_dyn_ipfw(d, pcwidth, bcwidth); 1690 } 1691 } 1692 } 1693 1694 ac = 0; 1695 1696 done: 1697 free(data); 1698 1699 if (exitval != EX_OK) 1700 exit(exitval); 1701 } 1702 1703 static void 1704 show_usage(void) 1705 { 1706 fprintf(stderr, "usage: ipfw [options]\n" 1707 " add [number] rule\n" 1708 " pipe number config [pipeconfig]\n" 1709 " queue number config [queueconfig]\n" 1710 " [pipe] flush\n" 1711 " [pipe] delete number ...\n" 1712 " [pipe] {list|show} [number ...]\n" 1713 " {zero|resetlog} [number ...]\n" 1714 "do \"ipfw -h\" or see ipfw manpage for details\n" 1715 ); 1716 1717 exit(EX_USAGE); 1718 } 1719 1720 static void 1721 help(void) 1722 { 1723 1724 fprintf(stderr, "ipfw syntax summary:\n" 1725 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1726 "ipfw {pipe|queue} N config BODY\n" 1727 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1728 "\n" 1729 "RULE: [1..] [PROB] BODY\n" 1730 "RULENUM: INTEGER(1..65534)\n" 1731 "PROB: prob REAL(0..1)\n" 1732 "BODY: check-state [LOG] (no body) |\n" 1733 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1734 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1735 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1736 "ADDR: [ MAC dst src ether_type ] \n" 1737 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1738 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1739 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1740 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1741 ); 1742 exit(0); 1743 } 1744 1745 1746 static int 1747 lookup_host (char *host, struct in_addr *ipaddr) 1748 { 1749 struct hostent *he; 1750 1751 if (!inet_aton(host, ipaddr)) { 1752 if ((he = gethostbyname(host)) == NULL) 1753 return(-1); 1754 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1755 } 1756 return(0); 1757 } 1758 1759 /* 1760 * fills the addr and mask fields in the instruction as appropriate from av. 1761 * Update length as appropriate. 1762 * The following formats are allowed: 1763 * any matches any IP. Actually returns an empty instruction. 1764 * me returns O_IP_*_ME 1765 * 1.2.3.4 single IP address 1766 * 1.2.3.4:5.6.7.8 address:mask 1767 * 1.2.3.4/24 address/mask 1768 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1769 */ 1770 static void 1771 fill_ip(ipfw_insn_ip *cmd, char *av) 1772 { 1773 char *p = 0, md = 0; 1774 u_int32_t i; 1775 1776 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1777 1778 if (!strncmp(av, "any", strlen(av))) 1779 return; 1780 1781 if (!strncmp(av, "me", strlen(av))) { 1782 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1783 return; 1784 } 1785 1786 p = strchr(av, '/'); 1787 if (!p) 1788 p = strchr(av, ':'); 1789 if (p) { 1790 md = *p; 1791 *p++ = '\0'; 1792 } 1793 1794 if (lookup_host(av, &cmd->addr) != 0) 1795 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1796 switch (md) { 1797 case ':': 1798 if (!inet_aton(p, &cmd->mask)) 1799 errx(EX_DATAERR, "bad netmask ``%s''", p); 1800 break; 1801 case '/': 1802 i = atoi(p); 1803 if (i == 0) 1804 cmd->mask.s_addr = htonl(0); 1805 else if (i > 32) 1806 errx(EX_DATAERR, "bad width ``%s''", p); 1807 else 1808 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1809 break; 1810 default: 1811 cmd->mask.s_addr = htonl(~0); 1812 break; 1813 } 1814 cmd->addr.s_addr &= cmd->mask.s_addr; 1815 /* 1816 * now look if we have a set of addresses. They are stored as follows: 1817 * arg1 is the set size (powers of 2, 2..256) 1818 * addr is the base address IN HOST FORMAT 1819 * mask.. is an array of u_int32_t with bits set. 1820 */ 1821 if (p) 1822 p = strchr(p, '{'); 1823 if (p) { /* fetch addresses */ 1824 u_int32_t *d; 1825 int low, high; 1826 int i = contigmask((u_char *)&(cmd->mask), 32); 1827 1828 if (i < 24 || i > 31) { 1829 fprintf(stderr, "invalid set with mask %d\n", 1830 i); 1831 exit(0); 1832 } 1833 cmd->o.arg1 = 1<<(32-i); 1834 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1835 d = (u_int32_t *)&cmd->mask; 1836 cmd->o.opcode = O_IP_DST_SET; /* default */ 1837 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1838 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1839 d[i] = 0; /* clear masks */ 1840 1841 av = p+1; 1842 low = cmd->addr.s_addr & 0xff; 1843 high = low + cmd->o.arg1 - 1; 1844 while (isdigit(*av)) { 1845 char *s; 1846 u_int16_t a = strtol(av, &s, 0); 1847 1848 if (s == av) /* no parameter */ 1849 break; 1850 if (a < low || a > high) { 1851 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1852 a, low, high); 1853 exit(0); 1854 } 1855 a -= low; 1856 d[ a/32] |= 1<<(a & 31); 1857 if (*s != ',') 1858 break; 1859 av = s+1; 1860 } 1861 return; 1862 } 1863 1864 if (cmd->mask.s_addr == 0) { /* any */ 1865 if (cmd->o.len & F_NOT) 1866 errx(EX_DATAERR, "not any never matches"); 1867 else /* useless, nuke it */ 1868 return; 1869 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1870 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1871 else /* addr/mask */ 1872 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1873 } 1874 1875 1876 /* 1877 * helper function to process a set of flags and set bits in the 1878 * appropriate masks. 1879 */ 1880 static void 1881 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1882 struct _s_x *flags, char *p) 1883 { 1884 u_int8_t set=0, clear=0; 1885 1886 while (p && *p) { 1887 char *q; /* points to the separator */ 1888 int val; 1889 u_int8_t *which; /* mask we are working on */ 1890 1891 if (*p == '!') { 1892 p++; 1893 which = &clear; 1894 } else 1895 which = &set; 1896 q = strchr(p, ','); 1897 if (q) 1898 *q++ = '\0'; 1899 val = match_token(flags, p); 1900 if (val <= 0) 1901 errx(EX_DATAERR, "invalid flag %s", p); 1902 *which |= (u_int8_t)val; 1903 p = q; 1904 } 1905 cmd->opcode = opcode; 1906 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 1907 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 1908 } 1909 1910 1911 static void 1912 delete(int ac, char *av[]) 1913 { 1914 u_int32_t rulenum; 1915 struct dn_ioc_pipe pipe; 1916 int i; 1917 int exitval = EX_OK; 1918 int do_set = 0; 1919 1920 memset(&pipe, 0, sizeof pipe); 1921 1922 av++; ac--; 1923 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 1924 do_set = 1; /* delete set */ 1925 ac--; av++; 1926 } 1927 1928 /* Rule number */ 1929 while (ac && isdigit(**av)) { 1930 i = atoi(*av); av++; ac--; 1931 if (do_pipe) { 1932 if (do_pipe == 1) 1933 pipe.pipe_nr = i; 1934 else 1935 pipe.fs.fs_nr = i; 1936 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 1937 &pipe, sizeof pipe); 1938 if (i) { 1939 exitval = 1; 1940 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 1941 do_pipe == 1 ? pipe.pipe_nr : 1942 pipe.fs.fs_nr); 1943 } 1944 } else { 1945 rulenum = (i & 0xffff) | (do_set << 24); 1946 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 1947 sizeof rulenum); 1948 if (i) { 1949 exitval = EX_UNAVAILABLE; 1950 warn("rule %u: setsockopt(IP_FW_DEL)", 1951 rulenum); 1952 } 1953 } 1954 } 1955 if (exitval != EX_OK) 1956 exit(exitval); 1957 } 1958 1959 1960 /* 1961 * fill the interface structure. We do not check the name as we can 1962 * create interfaces dynamically, so checking them at insert time 1963 * makes relatively little sense. 1964 * Interface names containing '*', '?', or '[' are assumed to be shell 1965 * patterns which match interfaces. 1966 */ 1967 static void 1968 fill_iface(ipfw_insn_if *cmd, char *arg) 1969 { 1970 cmd->name[0] = '\0'; 1971 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 1972 1973 /* Parse the interface or address */ 1974 if (!strcmp(arg, "any")) 1975 cmd->o.len = 0; /* effectively ignore this command */ 1976 else if (!isdigit(*arg)) { 1977 strlcpy(cmd->name, arg, sizeof(cmd->name)); 1978 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 1979 } else if (!inet_aton(arg, &cmd->p.ip)) 1980 errx(EX_DATAERR, "bad ip address ``%s''", arg); 1981 } 1982 1983 static unsigned long 1984 getbw(const char *str, u_short *flags, int kb) 1985 { 1986 char *end; 1987 unsigned long val; 1988 int inbytes = 0; 1989 1990 val = strtoul(str, &end, 0); 1991 if (*end == 'k' || *end == 'K') { 1992 ++end; 1993 val *= kb; 1994 } else if (*end == 'm' || *end == 'M') { 1995 ++end; 1996 val *= kb * kb; 1997 } 1998 1999 /* 2000 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 2001 * trailer assume bits. 2002 */ 2003 if (strncasecmp(end, "bit", 3) == 0) { 2004 ; 2005 } else if (strncasecmp(end, "byte", 4) == 0) { 2006 inbytes = 1; 2007 } else if (*end == 'b') { 2008 ; 2009 } else if (*end == 'B') { 2010 inbytes = 1; 2011 } 2012 2013 /* 2014 * Return in bits if flags is NULL, else flag bits 2015 * or bytes in flags and return the unconverted value. 2016 */ 2017 if (inbytes && flags) 2018 *flags |= DN_QSIZE_IS_BYTES; 2019 else if (inbytes && flags == NULL) 2020 val *= 8; 2021 return(val); 2022 } 2023 2024 /* 2025 * the following macro returns an error message if we run out of 2026 * arguments. 2027 */ 2028 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2029 2030 static void 2031 config_pipe(int ac, char **av) 2032 { 2033 struct dn_ioc_pipe pipe; 2034 int i; 2035 char *end; 2036 u_int32_t a; 2037 void *par = NULL; 2038 2039 memset(&pipe, 0, sizeof pipe); 2040 2041 av++; ac--; 2042 /* Pipe number */ 2043 if (ac && isdigit(**av)) { 2044 i = atoi(*av); av++; ac--; 2045 if (do_pipe == 1) 2046 pipe.pipe_nr = i; 2047 else 2048 pipe.fs.fs_nr = i; 2049 } 2050 while (ac > 0) { 2051 double d; 2052 int tok = match_token(dummynet_params, *av); 2053 ac--; av++; 2054 2055 switch(tok) { 2056 case TOK_NOERROR: 2057 pipe.fs.flags_fs |= DN_NOERROR; 2058 break; 2059 2060 case TOK_PLR: 2061 NEED1("plr needs argument 0..1\n"); 2062 d = strtod(av[0], NULL); 2063 if (d > 1) 2064 d = 1; 2065 else if (d < 0) 2066 d = 0; 2067 pipe.fs.plr = (int)(d*0x7fffffff); 2068 ac--; av++; 2069 break; 2070 2071 case TOK_QUEUE: 2072 NEED1("queue needs queue size\n"); 2073 end = NULL; 2074 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2075 ac--; av++; 2076 break; 2077 2078 case TOK_BUCKETS: 2079 NEED1("buckets needs argument\n"); 2080 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2081 ac--; av++; 2082 break; 2083 2084 case TOK_MASK: 2085 NEED1("mask needs mask specifier\n"); 2086 /* 2087 * per-flow queue, mask is dst_ip, dst_port, 2088 * src_ip, src_port, proto measured in bits 2089 */ 2090 par = NULL; 2091 2092 pipe.fs.flow_mask.type = ETHERTYPE_IP; 2093 pipe.fs.flow_mask.u.ip.dst_ip = 0; 2094 pipe.fs.flow_mask.u.ip.src_ip = 0; 2095 pipe.fs.flow_mask.u.ip.dst_port = 0; 2096 pipe.fs.flow_mask.u.ip.src_port = 0; 2097 pipe.fs.flow_mask.u.ip.proto = 0; 2098 end = NULL; 2099 2100 while (ac >= 1) { 2101 u_int32_t *p32 = NULL; 2102 u_int16_t *p16 = NULL; 2103 2104 tok = match_token(dummynet_params, *av); 2105 ac--; av++; 2106 switch(tok) { 2107 case TOK_ALL: 2108 /* 2109 * special case, all bits significant 2110 */ 2111 pipe.fs.flow_mask.u.ip.dst_ip = ~0; 2112 pipe.fs.flow_mask.u.ip.src_ip = ~0; 2113 pipe.fs.flow_mask.u.ip.dst_port = ~0; 2114 pipe.fs.flow_mask.u.ip.src_port = ~0; 2115 pipe.fs.flow_mask.u.ip.proto = ~0; 2116 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2117 goto end_mask; 2118 2119 case TOK_DSTIP: 2120 p32 = &pipe.fs.flow_mask.u.ip.dst_ip; 2121 break; 2122 2123 case TOK_SRCIP: 2124 p32 = &pipe.fs.flow_mask.u.ip.src_ip; 2125 break; 2126 2127 case TOK_DSTPORT: 2128 p16 = &pipe.fs.flow_mask.u.ip.dst_port; 2129 break; 2130 2131 case TOK_SRCPORT: 2132 p16 = &pipe.fs.flow_mask.u.ip.src_port; 2133 break; 2134 2135 case TOK_PROTO: 2136 break; 2137 2138 default: 2139 ac++; av--; /* backtrack */ 2140 goto end_mask; 2141 } 2142 if (ac < 1) 2143 errx(EX_USAGE, "mask: value missing"); 2144 if (*av[0] == '/') { 2145 a = strtoul(av[0]+1, &end, 0); 2146 a = (a == 32) ? ~0 : (1 << a) - 1; 2147 } else 2148 a = strtoul(av[0], &end, 0); 2149 if (p32 != NULL) 2150 *p32 = a; 2151 else if (p16 != NULL) { 2152 if (a > 65535) 2153 errx(EX_DATAERR, 2154 "mask: must be 16 bit"); 2155 *p16 = (u_int16_t)a; 2156 } else { 2157 if (a > 255) 2158 errx(EX_DATAERR, 2159 "mask: must be 8 bit"); 2160 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; 2161 } 2162 if (a != 0) 2163 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2164 ac--; av++; 2165 } /* end while, config masks */ 2166 end_mask: 2167 break; 2168 2169 case TOK_RED: 2170 case TOK_GRED: 2171 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2172 pipe.fs.flags_fs |= DN_IS_RED; 2173 if (tok == TOK_GRED) 2174 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2175 /* 2176 * the format for parameters is w_q/min_th/max_th/max_p 2177 */ 2178 if ((end = strsep(&av[0], "/"))) { 2179 double w_q = strtod(end, NULL); 2180 if (w_q > 1 || w_q <= 0) 2181 errx(EX_DATAERR, "0 < w_q <= 1"); 2182 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2183 } 2184 if ((end = strsep(&av[0], "/"))) { 2185 pipe.fs.min_th = strtoul(end, &end, 0); 2186 if (*end == 'K' || *end == 'k') 2187 pipe.fs.min_th *= 1024; 2188 } 2189 if ((end = strsep(&av[0], "/"))) { 2190 pipe.fs.max_th = strtoul(end, &end, 0); 2191 if (*end == 'K' || *end == 'k') 2192 pipe.fs.max_th *= 1024; 2193 } 2194 if ((end = strsep(&av[0], "/"))) { 2195 double max_p = strtod(end, NULL); 2196 if (max_p > 1 || max_p <= 0) 2197 errx(EX_DATAERR, "0 < max_p <= 1"); 2198 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2199 } 2200 ac--; av++; 2201 break; 2202 2203 case TOK_DROPTAIL: 2204 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2205 break; 2206 2207 case TOK_BW: 2208 NEED1("bw needs bandwidth\n"); 2209 if (do_pipe != 1) 2210 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2211 /* 2212 * set bandwidth value 2213 */ 2214 pipe.bandwidth = getbw(av[0], NULL, 1000); 2215 if (pipe.bandwidth < 0) 2216 errx(EX_DATAERR, "bandwidth too large"); 2217 ac--; av++; 2218 break; 2219 2220 case TOK_DELAY: 2221 if (do_pipe != 1) 2222 errx(EX_DATAERR, "delay only valid for pipes"); 2223 NEED1("delay needs argument 0..10000ms\n"); 2224 pipe.delay = strtoul(av[0], NULL, 0); 2225 ac--; av++; 2226 break; 2227 2228 case TOK_WEIGHT: 2229 if (do_pipe == 1) 2230 errx(EX_DATAERR,"weight only valid for queues"); 2231 NEED1("weight needs argument 0..100\n"); 2232 pipe.fs.weight = strtoul(av[0], &end, 0); 2233 ac--; av++; 2234 break; 2235 2236 case TOK_PIPE: 2237 if (do_pipe == 1) 2238 errx(EX_DATAERR,"pipe only valid for queues"); 2239 NEED1("pipe needs pipe_number\n"); 2240 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2241 ac--; av++; 2242 break; 2243 2244 default: 2245 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2246 } 2247 } 2248 if (do_pipe == 1) { 2249 if (pipe.pipe_nr == 0) 2250 errx(EX_DATAERR, "pipe_nr must be > 0"); 2251 if (pipe.delay > 10000) 2252 errx(EX_DATAERR, "delay must be < 10000"); 2253 } else { /* do_pipe == 2, queue */ 2254 if (pipe.fs.parent_nr == 0) 2255 errx(EX_DATAERR, "pipe must be > 0"); 2256 if (pipe.fs.weight >100) 2257 errx(EX_DATAERR, "weight must be <= 100"); 2258 } 2259 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2260 if (pipe.fs.qsize > 1024*1024) 2261 errx(EX_DATAERR, "queue size must be < 1MB"); 2262 } else { 2263 if (pipe.fs.qsize > 100) 2264 errx(EX_DATAERR, "2 <= queue size <= 100"); 2265 } 2266 if (pipe.fs.flags_fs & DN_IS_RED) { 2267 size_t len; 2268 int lookup_depth, avg_pkt_size; 2269 double s, idle, weight, w_q; 2270 int clock_hz; 2271 int t; 2272 2273 if (pipe.fs.min_th >= pipe.fs.max_th) 2274 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2275 pipe.fs.min_th, pipe.fs.max_th); 2276 if (pipe.fs.max_th == 0) 2277 errx(EX_DATAERR, "max_th must be > 0"); 2278 2279 len = sizeof(int); 2280 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2281 &lookup_depth, &len, NULL, 0) == -1) 2282 2283 errx(1, "sysctlbyname(\"%s\")", 2284 "net.inet.ip.dummynet.red_lookup_depth"); 2285 if (lookup_depth == 0) 2286 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2287 " must be greater than zero"); 2288 2289 len = sizeof(int); 2290 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2291 &avg_pkt_size, &len, NULL, 0) == -1) 2292 2293 errx(1, "sysctlbyname(\"%s\")", 2294 "net.inet.ip.dummynet.red_avg_pkt_size"); 2295 if (avg_pkt_size == 0) 2296 errx(EX_DATAERR, 2297 "net.inet.ip.dummynet.red_avg_pkt_size must" 2298 " be greater than zero"); 2299 2300 len = sizeof(clock_hz); 2301 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, 2302 NULL, 0) == -1) { 2303 errx(1, "sysctlbyname(\"%s\")", 2304 "net.inet.ip.dummynet.hz"); 2305 } 2306 2307 /* 2308 * Ticks needed for sending a medium-sized packet. 2309 * Unfortunately, when we are configuring a WF2Q+ queue, we 2310 * do not have bandwidth information, because that is stored 2311 * in the parent pipe, and also we have multiple queues 2312 * competing for it. So we set s=0, which is not very 2313 * correct. But on the other hand, why do we want RED with 2314 * WF2Q+ ? 2315 */ 2316 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2317 s = 0; 2318 else 2319 s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; 2320 2321 /* 2322 * max idle time (in ticks) before avg queue size becomes 0. 2323 * NOTA: (3/w_q) is approx the value x so that 2324 * (1-w_q)^x < 10^-3. 2325 */ 2326 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2327 idle = s * 3. / w_q; 2328 pipe.fs.lookup_step = (int)idle / lookup_depth; 2329 if (!pipe.fs.lookup_step) 2330 pipe.fs.lookup_step = 1; 2331 weight = 1 - w_q; 2332 for (t = pipe.fs.lookup_step; t > 0; --t) 2333 weight *= weight; 2334 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2335 } 2336 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2337 sizeof pipe); 2338 if (i) 2339 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2340 } 2341 2342 static void 2343 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2344 { 2345 int i, l; 2346 2347 for (i=0; i<6; i++) 2348 addr[i] = mask[i] = 0; 2349 if (!strcmp(p, "any")) 2350 return; 2351 2352 for (i=0; *p && i<6;i++, p++) { 2353 addr[i] = strtol(p, &p, 16); 2354 if (*p != ':') /* we start with the mask */ 2355 break; 2356 } 2357 if (*p == '/') { /* mask len */ 2358 l = strtol(p+1, &p, 0); 2359 for (i=0; l>0; l -=8, i++) 2360 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2361 } else if (*p == '&') { /* mask */ 2362 for (i=0, p++; *p && i<6;i++, p++) { 2363 mask[i] = strtol(p, &p, 16); 2364 if (*p != ':') 2365 break; 2366 } 2367 } else if (*p == '\0') { 2368 for (i=0; i<6; i++) 2369 mask[i] = 0xff; 2370 } 2371 for (i=0; i<6; i++) 2372 addr[i] &= mask[i]; 2373 } 2374 2375 /* 2376 * helper function, updates the pointer to cmd with the length 2377 * of the current command, and also cleans up the first word of 2378 * the new command in case it has been clobbered before. 2379 */ 2380 static ipfw_insn * 2381 next_cmd(ipfw_insn *cmd) 2382 { 2383 cmd += F_LEN(cmd); 2384 bzero(cmd, sizeof(*cmd)); 2385 return cmd; 2386 } 2387 2388 /* 2389 * A function to fill simple commands of size 1. 2390 * Existing flags are preserved. 2391 */ 2392 static void 2393 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2394 { 2395 cmd->opcode = opcode; 2396 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2397 cmd->arg1 = arg; 2398 } 2399 2400 /* 2401 * Fetch and add the MAC address and type, with masks. This generates one or 2402 * two microinstructions, and returns the pointer to the last one. 2403 */ 2404 static ipfw_insn * 2405 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2406 { 2407 ipfw_insn_mac *mac; 2408 2409 if (ac < 2) 2410 errx(EX_DATAERR, "MAC dst src"); 2411 2412 cmd->opcode = O_MACADDR2; 2413 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2414 2415 mac = (ipfw_insn_mac *)cmd; 2416 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2417 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2418 return cmd; 2419 } 2420 2421 static ipfw_insn * 2422 add_mactype(ipfw_insn *cmd, int ac, char *av) 2423 { 2424 if (ac < 1) 2425 errx(EX_DATAERR, "missing MAC type"); 2426 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2427 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2428 cmd->opcode = O_MAC_TYPE; 2429 return cmd; 2430 } else 2431 return NULL; 2432 } 2433 2434 static ipfw_insn * 2435 add_proto(ipfw_insn *cmd, char *av) 2436 { 2437 struct protoent *pe; 2438 u_char proto = 0; 2439 2440 if (!strncmp(av, "all", strlen(av))) 2441 ; /* same as "ip" */ 2442 else if ((proto = atoi(av)) > 0) 2443 ; /* all done! */ 2444 else if ((pe = getprotobyname(av)) != NULL) 2445 proto = pe->p_proto; 2446 else 2447 return NULL; 2448 if (proto != IPPROTO_IP) 2449 fill_cmd(cmd, O_PROTO, 0, proto); 2450 return cmd; 2451 } 2452 2453 static ipfw_insn * 2454 add_srcip(ipfw_insn *cmd, char *av) 2455 { 2456 fill_ip((ipfw_insn_ip *)cmd, av); 2457 if (cmd->opcode == O_IP_DST_SET) /* set */ 2458 cmd->opcode = O_IP_SRC_SET; 2459 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2460 cmd->opcode = O_IP_SRC_ME; 2461 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2462 cmd->opcode = O_IP_SRC; 2463 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2464 cmd->opcode = O_IP_SRC_MASK; 2465 return cmd; 2466 } 2467 2468 static ipfw_insn * 2469 add_dstip(ipfw_insn *cmd, char *av) 2470 { 2471 fill_ip((ipfw_insn_ip *)cmd, av); 2472 if (cmd->opcode == O_IP_DST_SET) /* set */ 2473 ; 2474 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2475 cmd->opcode = O_IP_DST_ME; 2476 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2477 cmd->opcode = O_IP_DST; 2478 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2479 cmd->opcode = O_IP_DST_MASK; 2480 return cmd; 2481 } 2482 2483 static ipfw_insn * 2484 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2485 { 2486 if (!strncmp(av, "any", strlen(av))) { 2487 return NULL; 2488 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2489 /* XXX todo: check that we have a protocol with ports */ 2490 cmd->opcode = opcode; 2491 return cmd; 2492 } 2493 return NULL; 2494 } 2495 2496 /* 2497 * Parse arguments and assemble the microinstructions which make up a rule. 2498 * Rules are added into the 'rulebuf' and then copied in the correct order 2499 * into the actual rule. 2500 * 2501 * The syntax for a rule starts with the action, followed by an 2502 * optional log action, and the various match patterns. 2503 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2504 * (generated if the rule includes a keep-state option), then the 2505 * various match patterns, the "log" action, and the actual action. 2506 * 2507 */ 2508 static void 2509 add(int ac, char *av[]) 2510 { 2511 /* 2512 * rules are added into the 'rulebuf' and then copied in 2513 * the correct order into the actual rule. 2514 * Some things that need to go out of order (prob, action etc.) 2515 * go into actbuf[]. 2516 */ 2517 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX]; 2518 static uint32_t actbuf[IPFW_RULE_SIZE_MAX]; 2519 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX]; 2520 2521 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2522 ipfw_insn *first_cmd; /* first match pattern */ 2523 2524 struct ipfw_ioc_rule *rule; 2525 2526 /* 2527 * various flags used to record that we entered some fields. 2528 */ 2529 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2530 2531 int i; 2532 2533 int open_par = 0; /* open parenthesis ( */ 2534 2535 /* proto is here because it is used to fetch ports */ 2536 u_char proto = IPPROTO_IP; /* default protocol */ 2537 2538 double match_prob = 1; /* match probability, default is always match */ 2539 2540 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2541 bzero(cmdbuf, sizeof(cmdbuf)); 2542 bzero(rulebuf, sizeof(rulebuf)); 2543 2544 rule = (struct ipfw_ioc_rule *)rulebuf; 2545 cmd = (ipfw_insn *)cmdbuf; 2546 action = (ipfw_insn *)actbuf; 2547 2548 av++; ac--; 2549 2550 /* [rule N] -- Rule number optional */ 2551 if (ac && isdigit(**av)) { 2552 rule->rulenum = atoi(*av); 2553 av++; 2554 ac--; 2555 } 2556 2557 /* [set N] -- set number (0..30), optional */ 2558 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2559 int set = strtoul(av[1], NULL, 10); 2560 if (set < 0 || set > 30) 2561 errx(EX_DATAERR, "illegal set %s", av[1]); 2562 rule->set = set; 2563 av += 2; ac -= 2; 2564 } 2565 2566 /* [prob D] -- match probability, optional */ 2567 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2568 match_prob = strtod(av[1], NULL); 2569 2570 if (match_prob <= 0 || match_prob > 1) 2571 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2572 av += 2; ac -= 2; 2573 } 2574 2575 /* action -- mandatory */ 2576 NEED1("missing action"); 2577 i = match_token(rule_actions, *av); 2578 ac--; av++; 2579 action->len = 1; /* default */ 2580 switch(i) { 2581 case TOK_CHECKSTATE: 2582 have_state = action; 2583 action->opcode = O_CHECK_STATE; 2584 break; 2585 2586 case TOK_ACCEPT: 2587 action->opcode = O_ACCEPT; 2588 break; 2589 2590 case TOK_DENY: 2591 action->opcode = O_DENY; 2592 action->arg1 = 0; 2593 break; 2594 2595 case TOK_REJECT: 2596 action->opcode = O_REJECT; 2597 action->arg1 = ICMP_UNREACH_HOST; 2598 break; 2599 2600 case TOK_RESET: 2601 action->opcode = O_REJECT; 2602 action->arg1 = ICMP_REJECT_RST; 2603 break; 2604 2605 case TOK_UNREACH: 2606 action->opcode = O_REJECT; 2607 NEED1("missing reject code"); 2608 fill_reject_code(&action->arg1, *av); 2609 ac--; av++; 2610 break; 2611 2612 case TOK_COUNT: 2613 action->opcode = O_COUNT; 2614 break; 2615 2616 case TOK_QUEUE: 2617 case TOK_PIPE: 2618 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2619 case TOK_SKIPTO: 2620 if (i == TOK_QUEUE) 2621 action->opcode = O_QUEUE; 2622 else if (i == TOK_PIPE) 2623 action->opcode = O_PIPE; 2624 else if (i == TOK_SKIPTO) 2625 action->opcode = O_SKIPTO; 2626 NEED1("missing skipto/pipe/queue number"); 2627 action->arg1 = strtoul(*av, NULL, 10); 2628 av++; ac--; 2629 break; 2630 2631 case TOK_DIVERT: 2632 case TOK_TEE: 2633 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2634 NEED1("missing divert/tee port"); 2635 action->arg1 = strtoul(*av, NULL, 0); 2636 if (action->arg1 == 0) { 2637 struct servent *s; 2638 setservent(1); 2639 s = getservbyname(av[0], "divert"); 2640 if (s != NULL) 2641 action->arg1 = ntohs(s->s_port); 2642 else 2643 errx(EX_DATAERR, "illegal divert/tee port"); 2644 } 2645 ac--; av++; 2646 break; 2647 2648 case TOK_FORWARD: { 2649 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2650 char *s, *end; 2651 2652 NEED1("missing forward address[:port]"); 2653 2654 action->opcode = O_FORWARD_IP; 2655 action->len = F_INSN_SIZE(ipfw_insn_sa); 2656 2657 p->sa.sin_len = sizeof(struct sockaddr_in); 2658 p->sa.sin_family = AF_INET; 2659 p->sa.sin_port = 0; 2660 /* 2661 * locate the address-port separator (':' or ',') 2662 */ 2663 s = strchr(*av, ':'); 2664 if (s == NULL) 2665 s = strchr(*av, ','); 2666 if (s != NULL) { 2667 *(s++) = '\0'; 2668 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2669 if (s == end) 2670 errx(EX_DATAERR, 2671 "illegal forwarding port ``%s''", s); 2672 p->sa.sin_port = (u_short)i; 2673 } 2674 lookup_host(*av, &(p->sa.sin_addr)); 2675 } 2676 ac--; av++; 2677 break; 2678 2679 default: 2680 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2681 } 2682 action = next_cmd(action); 2683 2684 /* 2685 * [log [logamount N]] -- log, optional 2686 * 2687 * If exists, it goes first in the cmdbuf, but then it is 2688 * skipped in the copy section to the end of the buffer. 2689 */ 2690 if (ac && !strncmp(*av, "log", strlen(*av))) { 2691 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2692 2693 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2694 cmd->opcode = O_LOG; 2695 av++; ac--; 2696 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2697 ac--; av++; 2698 NEED1("logamount requires argument"); 2699 c->max_log = atoi(*av); 2700 if (c->max_log < 0) 2701 errx(EX_DATAERR, "logamount must be positive"); 2702 ac--; av++; 2703 } 2704 cmd = next_cmd(cmd); 2705 } 2706 2707 if (have_state) /* must be a check-state, we are done */ 2708 goto done; 2709 2710 #define OR_START(target) \ 2711 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2712 if (open_par) \ 2713 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2714 prev = NULL; \ 2715 open_par = 1; \ 2716 if ( (av[0])[1] == '\0') { \ 2717 ac--; av++; \ 2718 } else \ 2719 (*av)++; \ 2720 } \ 2721 target: \ 2722 2723 2724 #define CLOSE_PAR \ 2725 if (open_par) { \ 2726 if (ac && ( \ 2727 !strncmp(*av, ")", strlen(*av)) || \ 2728 !strncmp(*av, "}", strlen(*av)) )) { \ 2729 prev = NULL; \ 2730 open_par = 0; \ 2731 ac--; av++; \ 2732 } else \ 2733 errx(EX_USAGE, "missing \")\"\n"); \ 2734 } 2735 2736 #define NOT_BLOCK \ 2737 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2738 if (cmd->len & F_NOT) \ 2739 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2740 cmd->len |= F_NOT; \ 2741 ac--; av++; \ 2742 } 2743 2744 #define OR_BLOCK(target) \ 2745 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2746 if (prev == NULL || open_par == 0) \ 2747 errx(EX_DATAERR, "invalid OR block"); \ 2748 prev->len |= F_OR; \ 2749 ac--; av++; \ 2750 goto target; \ 2751 } \ 2752 CLOSE_PAR; 2753 2754 first_cmd = cmd; 2755 2756 #if 0 2757 /* 2758 * MAC addresses, optional. 2759 * If we have this, we skip the part "proto from src to dst" 2760 * and jump straight to the option parsing. 2761 */ 2762 NOT_BLOCK; 2763 NEED1("missing protocol"); 2764 if (!strncmp(*av, "MAC", strlen(*av)) || 2765 !strncmp(*av, "mac", strlen(*av))) { 2766 ac--; av++; /* the "MAC" keyword */ 2767 add_mac(cmd, ac, av); /* exits in case of errors */ 2768 cmd = next_cmd(cmd); 2769 ac -= 2; av += 2; /* dst-mac and src-mac */ 2770 NOT_BLOCK; 2771 NEED1("missing mac type"); 2772 if (add_mactype(cmd, ac, av[0])) 2773 cmd = next_cmd(cmd); 2774 ac--; av++; /* any or mac-type */ 2775 goto read_options; 2776 } 2777 #endif 2778 2779 /* 2780 * protocol, mandatory 2781 */ 2782 OR_START(get_proto); 2783 NOT_BLOCK; 2784 NEED1("missing protocol"); 2785 if (add_proto(cmd, *av)) { 2786 av++; ac--; 2787 if (F_LEN(cmd) == 0) /* plain IP */ 2788 proto = 0; 2789 else { 2790 proto = cmd->arg1; 2791 prev = cmd; 2792 cmd = next_cmd(cmd); 2793 } 2794 } else if (first_cmd != cmd) { 2795 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2796 } else 2797 goto read_options; 2798 OR_BLOCK(get_proto); 2799 2800 /* 2801 * "from", mandatory 2802 */ 2803 if (!ac || strncmp(*av, "from", strlen(*av))) 2804 errx(EX_USAGE, "missing ``from''"); 2805 ac--; av++; 2806 2807 /* 2808 * source IP, mandatory 2809 */ 2810 OR_START(source_ip); 2811 NOT_BLOCK; /* optional "not" */ 2812 NEED1("missing source address"); 2813 if (add_srcip(cmd, *av)) { 2814 ac--; av++; 2815 if (F_LEN(cmd) != 0) { /* ! any */ 2816 prev = cmd; 2817 cmd = next_cmd(cmd); 2818 } 2819 } 2820 OR_BLOCK(source_ip); 2821 2822 /* 2823 * source ports, optional 2824 */ 2825 NOT_BLOCK; /* optional "not" */ 2826 if (ac) { 2827 if (!strncmp(*av, "any", strlen(*av)) || 2828 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2829 ac--; av++; 2830 if (F_LEN(cmd) != 0) 2831 cmd = next_cmd(cmd); 2832 } 2833 } 2834 2835 /* 2836 * "to", mandatory 2837 */ 2838 if (!ac || strncmp(*av, "to", strlen(*av))) 2839 errx(EX_USAGE, "missing ``to''"); 2840 av++; ac--; 2841 2842 /* 2843 * destination, mandatory 2844 */ 2845 OR_START(dest_ip); 2846 NOT_BLOCK; /* optional "not" */ 2847 NEED1("missing dst address"); 2848 if (add_dstip(cmd, *av)) { 2849 ac--; av++; 2850 if (F_LEN(cmd) != 0) { /* ! any */ 2851 prev = cmd; 2852 cmd = next_cmd(cmd); 2853 } 2854 } 2855 OR_BLOCK(dest_ip); 2856 2857 /* 2858 * dest. ports, optional 2859 */ 2860 NOT_BLOCK; /* optional "not" */ 2861 if (ac) { 2862 if (!strncmp(*av, "any", strlen(*av)) || 2863 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2864 ac--; av++; 2865 if (F_LEN(cmd) != 0) 2866 cmd = next_cmd(cmd); 2867 } 2868 } 2869 2870 read_options: 2871 if (ac && first_cmd == cmd) { 2872 /* 2873 * nothing specified so far, store in the rule to ease 2874 * printout later. 2875 */ 2876 rule->usr_flags = IPFW_USR_F_NORULE; 2877 } 2878 prev = NULL; 2879 while (ac) { 2880 char *s; 2881 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2882 2883 s = *av; 2884 cmd32 = (ipfw_insn_u32 *)cmd; 2885 2886 if (*s == '!') { /* alternate syntax for NOT */ 2887 if (cmd->len & F_NOT) 2888 errx(EX_USAGE, "double \"not\" not allowed\n"); 2889 cmd->len = F_NOT; 2890 s++; 2891 } 2892 i = match_token(rule_options, s); 2893 ac--; av++; 2894 switch(i) { 2895 case TOK_NOT: 2896 if (cmd->len & F_NOT) 2897 errx(EX_USAGE, "double \"not\" not allowed\n"); 2898 cmd->len = F_NOT; 2899 break; 2900 2901 case TOK_OR: 2902 if (open_par == 0 || prev == NULL) 2903 errx(EX_USAGE, "invalid \"or\" block\n"); 2904 prev->len |= F_OR; 2905 break; 2906 2907 case TOK_STARTBRACE: 2908 if (open_par) 2909 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2910 open_par = 1; 2911 break; 2912 2913 case TOK_ENDBRACE: 2914 if (!open_par) 2915 errx(EX_USAGE, "+missing \")\"\n"); 2916 open_par = 0; 2917 prev = NULL; 2918 break; 2919 2920 case TOK_IN: 2921 fill_cmd(cmd, O_IN, 0, 0); 2922 break; 2923 2924 case TOK_OUT: 2925 cmd->len ^= F_NOT; /* toggle F_NOT */ 2926 fill_cmd(cmd, O_IN, 0, 0); 2927 break; 2928 2929 case TOK_FRAG: 2930 fill_cmd(cmd, O_FRAG, 0, 0); 2931 break; 2932 2933 case TOK_LAYER2: 2934 fill_cmd(cmd, O_LAYER2, 0, 0); 2935 break; 2936 2937 case TOK_XMIT: 2938 case TOK_RECV: 2939 case TOK_VIA: 2940 NEED1("recv, xmit, via require interface name" 2941 " or address"); 2942 fill_iface((ipfw_insn_if *)cmd, av[0]); 2943 ac--; av++; 2944 if (F_LEN(cmd) == 0) /* not a valid address */ 2945 break; 2946 if (i == TOK_XMIT) 2947 cmd->opcode = O_XMIT; 2948 else if (i == TOK_RECV) 2949 cmd->opcode = O_RECV; 2950 else if (i == TOK_VIA) 2951 cmd->opcode = O_VIA; 2952 break; 2953 2954 case TOK_ICMPTYPES: 2955 NEED1("icmptypes requires list of types"); 2956 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 2957 av++; ac--; 2958 break; 2959 2960 case TOK_IPTTL: 2961 NEED1("ipttl requires TTL"); 2962 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 2963 ac--; av++; 2964 break; 2965 2966 case TOK_IPID: 2967 NEED1("ipid requires length"); 2968 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 2969 ac--; av++; 2970 break; 2971 2972 case TOK_IPLEN: 2973 NEED1("iplen requires length"); 2974 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 2975 ac--; av++; 2976 break; 2977 2978 case TOK_IPVER: 2979 NEED1("ipver requires version"); 2980 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 2981 ac--; av++; 2982 break; 2983 2984 case TOK_IPPRECEDENCE: 2985 NEED1("ipprecedence requires value"); 2986 fill_cmd(cmd, O_IPPRECEDENCE, 0, 2987 (strtoul(*av, NULL, 0) & 7) << 5); 2988 ac--; av++; 2989 break; 2990 2991 case TOK_IPOPTS: 2992 NEED1("missing argument for ipoptions"); 2993 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 2994 ac--; av++; 2995 break; 2996 2997 case TOK_IPTOS: 2998 NEED1("missing argument for iptos"); 2999 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3000 ac--; av++; 3001 break; 3002 3003 case TOK_UID: 3004 NEED1("uid requires argument"); 3005 { 3006 char *end; 3007 uid_t uid; 3008 struct passwd *pwd; 3009 3010 cmd->opcode = O_UID; 3011 uid = strtoul(*av, &end, 0); 3012 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3013 if (pwd == NULL) 3014 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3015 cmd32->d[0] = pwd->pw_uid; 3016 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3017 ac--; av++; 3018 } 3019 break; 3020 3021 case TOK_GID: 3022 NEED1("gid requires argument"); 3023 { 3024 char *end; 3025 gid_t gid; 3026 struct group *grp; 3027 3028 cmd->opcode = O_GID; 3029 gid = strtoul(*av, &end, 0); 3030 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3031 if (grp == NULL) 3032 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3033 cmd32->d[0] = grp->gr_gid; 3034 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3035 ac--; av++; 3036 } 3037 break; 3038 3039 case TOK_ESTAB: 3040 fill_cmd(cmd, O_ESTAB, 0, 0); 3041 break; 3042 3043 case TOK_SETUP: 3044 fill_cmd(cmd, O_TCPFLAGS, 0, 3045 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3046 break; 3047 3048 case TOK_TCPOPTS: 3049 NEED1("missing argument for tcpoptions"); 3050 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3051 ac--; av++; 3052 break; 3053 3054 case TOK_TCPSEQ: 3055 case TOK_TCPACK: 3056 NEED1("tcpseq/tcpack requires argument"); 3057 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3058 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3059 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3060 ac--; av++; 3061 break; 3062 3063 case TOK_TCPWIN: 3064 NEED1("tcpwin requires length"); 3065 fill_cmd(cmd, O_TCPWIN, 0, 3066 htons(strtoul(*av, NULL, 0))); 3067 ac--; av++; 3068 break; 3069 3070 case TOK_TCPFLAGS: 3071 NEED1("missing argument for tcpflags"); 3072 cmd->opcode = O_TCPFLAGS; 3073 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3074 ac--; av++; 3075 break; 3076 3077 case TOK_KEEPSTATE: 3078 if (open_par) 3079 errx(EX_USAGE, "keep-state cannot be part " 3080 "of an or block"); 3081 if (have_state) 3082 errx(EX_USAGE, "only one of keep-state " 3083 "and limit is allowed"); 3084 have_state = cmd; 3085 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3086 break; 3087 3088 case TOK_LIMIT: 3089 if (open_par) 3090 errx(EX_USAGE, "limit cannot be part " 3091 "of an or block"); 3092 if (have_state) 3093 errx(EX_USAGE, "only one of keep-state " 3094 "and limit is allowed"); 3095 NEED1("limit needs mask and # of connections"); 3096 have_state = cmd; 3097 { 3098 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3099 3100 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3101 cmd->opcode = O_LIMIT; 3102 c->limit_mask = 0; 3103 c->conn_limit = 0; 3104 for (; ac >1 ;) { 3105 int val; 3106 3107 val = match_token(limit_masks, *av); 3108 if (val <= 0) 3109 break; 3110 c->limit_mask |= val; 3111 ac--; av++; 3112 } 3113 c->conn_limit = atoi(*av); 3114 if (c->conn_limit == 0) 3115 errx(EX_USAGE, "limit: limit must be >0"); 3116 if (c->limit_mask == 0) 3117 errx(EX_USAGE, "missing limit mask"); 3118 ac--; av++; 3119 } 3120 break; 3121 3122 case TOK_PROTO: 3123 NEED1("missing protocol"); 3124 if (add_proto(cmd, *av)) { 3125 proto = cmd->arg1; 3126 ac--; av++; 3127 } else 3128 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3129 break; 3130 3131 case TOK_SRCIP: 3132 NEED1("missing source IP"); 3133 if (add_srcip(cmd, *av)) { 3134 ac--; av++; 3135 } 3136 break; 3137 3138 case TOK_DSTIP: 3139 NEED1("missing destination IP"); 3140 if (add_dstip(cmd, *av)) { 3141 ac--; av++; 3142 } 3143 break; 3144 3145 case TOK_SRCPORT: 3146 NEED1("missing source port"); 3147 if (!strncmp(*av, "any", strlen(*av)) || 3148 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3149 ac--; av++; 3150 } else 3151 errx(EX_DATAERR, "invalid source port %s", *av); 3152 break; 3153 3154 case TOK_DSTPORT: 3155 NEED1("missing destination port"); 3156 if (!strncmp(*av, "any", strlen(*av)) || 3157 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3158 ac--; av++; 3159 } else 3160 errx(EX_DATAERR, "invalid destination port %s", 3161 *av); 3162 break; 3163 3164 case TOK_MAC: 3165 if (ac < 2) 3166 errx(EX_USAGE, "MAC dst-mac src-mac"); 3167 if (add_mac(cmd, ac, av)) { 3168 ac -= 2; av += 2; 3169 } 3170 break; 3171 3172 case TOK_MACTYPE: 3173 NEED1("missing mac type"); 3174 if (!add_mactype(cmd, ac, *av)) 3175 errx(EX_DATAERR, "invalid mac type %s", *av); 3176 ac--; av++; 3177 break; 3178 3179 default: 3180 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3181 } 3182 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3183 prev = cmd; 3184 cmd = next_cmd(cmd); 3185 } 3186 } 3187 3188 done: 3189 /* 3190 * Now copy stuff into the rule. 3191 * If we have a keep-state option, the first instruction 3192 * must be a PROBE_STATE (which is generated here). 3193 * If we have a LOG option, it was stored as the first command, 3194 * and now must be moved to the top of the action part. 3195 */ 3196 dst = (ipfw_insn *)rule->cmd; 3197 3198 /* 3199 * First thing to write into the command stream is the match probability. 3200 */ 3201 if (match_prob != 1) { /* 1 means always match */ 3202 dst->opcode = O_PROB; 3203 dst->len = 2; 3204 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3205 dst += dst->len; 3206 } 3207 3208 /* 3209 * generate O_PROBE_STATE if necessary 3210 */ 3211 if (have_state && have_state->opcode != O_CHECK_STATE) { 3212 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3213 dst = next_cmd(dst); 3214 } 3215 /* 3216 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3217 */ 3218 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3219 i = F_LEN(src); 3220 3221 switch (src->opcode) { 3222 case O_LOG: 3223 case O_KEEP_STATE: 3224 case O_LIMIT: 3225 break; 3226 default: 3227 bcopy(src, dst, i * sizeof(u_int32_t)); 3228 dst += i; 3229 } 3230 } 3231 3232 /* 3233 * put back the have_state command as last opcode 3234 */ 3235 if (have_state && have_state->opcode != O_CHECK_STATE) { 3236 i = F_LEN(have_state); 3237 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3238 dst += i; 3239 } 3240 /* 3241 * start action section 3242 */ 3243 rule->act_ofs = dst - rule->cmd; 3244 3245 /* 3246 * put back O_LOG if necessary 3247 */ 3248 src = (ipfw_insn *)cmdbuf; 3249 if ( src->opcode == O_LOG ) { 3250 i = F_LEN(src); 3251 bcopy(src, dst, i * sizeof(u_int32_t)); 3252 dst += i; 3253 } 3254 /* 3255 * copy all other actions 3256 */ 3257 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3258 i = F_LEN(src); 3259 bcopy(src, dst, i * sizeof(u_int32_t)); 3260 dst += i; 3261 } 3262 3263 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3264 i = (void *)dst - (void *)rule; 3265 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3266 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3267 if (!do_quiet) 3268 show_ipfw(rule, 10, 10); 3269 } 3270 3271 static void 3272 zero(int ac, char *av[]) 3273 { 3274 int rulenum; 3275 int failed = EX_OK; 3276 3277 av++; ac--; 3278 3279 if (!ac) { 3280 /* clear all entries */ 3281 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3282 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3283 if (!do_quiet) 3284 printf("Accounting cleared.\n"); 3285 3286 return; 3287 } 3288 3289 while (ac) { 3290 /* Rule number */ 3291 if (isdigit(**av)) { 3292 rulenum = atoi(*av); 3293 av++; 3294 ac--; 3295 if (setsockopt(s, IPPROTO_IP, 3296 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3297 warn("rule %u: setsockopt(IP_FW_ZERO)", 3298 rulenum); 3299 failed = EX_UNAVAILABLE; 3300 } else if (!do_quiet) 3301 printf("Entry %d cleared\n", rulenum); 3302 } else { 3303 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3304 } 3305 } 3306 if (failed != EX_OK) 3307 exit(failed); 3308 } 3309 3310 static void 3311 resetlog(int ac, char *av[]) 3312 { 3313 int rulenum; 3314 int failed = EX_OK; 3315 3316 av++; ac--; 3317 3318 if (!ac) { 3319 /* clear all entries */ 3320 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3321 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3322 if (!do_quiet) 3323 printf("Logging counts reset.\n"); 3324 3325 return; 3326 } 3327 3328 while (ac) { 3329 /* Rule number */ 3330 if (isdigit(**av)) { 3331 rulenum = atoi(*av); 3332 av++; 3333 ac--; 3334 if (setsockopt(s, IPPROTO_IP, 3335 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3336 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3337 rulenum); 3338 failed = EX_UNAVAILABLE; 3339 } else if (!do_quiet) 3340 printf("Entry %d logging count reset\n", 3341 rulenum); 3342 } else { 3343 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3344 } 3345 } 3346 if (failed != EX_OK) 3347 exit(failed); 3348 } 3349 3350 static void 3351 flush(void) 3352 { 3353 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3354 3355 if (!do_force && !do_quiet) { /* need to ask user */ 3356 int c; 3357 3358 printf("Are you sure? [yn] "); 3359 fflush(stdout); 3360 do { 3361 c = toupper(getc(stdin)); 3362 while (c != '\n' && getc(stdin) != '\n') 3363 if (feof(stdin)) 3364 return; /* and do not flush */ 3365 } while (c != 'Y' && c != 'N'); 3366 printf("\n"); 3367 if (c == 'N') /* user said no */ 3368 return; 3369 } 3370 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3371 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3372 do_pipe ? "DUMMYNET" : "FW"); 3373 if (!do_quiet) 3374 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3375 } 3376 3377 static int 3378 ipfw_main(int ac, char **av) 3379 { 3380 int ch; 3381 3382 if (ac == 1) 3383 show_usage(); 3384 3385 /* Set the force flag for non-interactive processes */ 3386 do_force = !isatty(STDIN_FILENO); 3387 3388 optind = optreset = 1; 3389 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3390 switch (ch) { 3391 case 'h': /* help */ 3392 help(); 3393 break; /* NOTREACHED */ 3394 3395 case 's': /* sort */ 3396 do_sort = atoi(optarg); 3397 break; 3398 case 'a': 3399 do_acct = 1; 3400 break; 3401 case 'c': 3402 do_compact = 1; 3403 break; 3404 case 'd': 3405 do_dynamic = 1; 3406 break; 3407 case 'e': 3408 do_expired = 1; 3409 break; 3410 case 'f': 3411 do_force = 1; 3412 break; 3413 case 'N': 3414 do_resolv = 1; 3415 break; 3416 case 'q': 3417 do_quiet = 1; 3418 break; 3419 case 'S': 3420 show_sets = 1; 3421 break; 3422 case 't': 3423 do_time = 1; 3424 break; 3425 case 'v': /* verbose */ 3426 verbose++; 3427 break; 3428 default: 3429 show_usage(); 3430 } 3431 3432 ac -= optind; 3433 av += optind; 3434 NEED1("bad arguments, for usage summary ``ipfw''"); 3435 3436 /* 3437 * optional: pipe or queue 3438 */ 3439 if (!strncmp(*av, "pipe", strlen(*av))) { 3440 do_pipe = 1; 3441 ac--; 3442 av++; 3443 } else if (!strncmp(*av, "queue", strlen(*av))) { 3444 do_pipe = 2; 3445 ac--; 3446 av++; 3447 } 3448 NEED1("missing command"); 3449 3450 /* 3451 * for pipes and queues we normally say 'pipe NN config' 3452 * but the code is easier to parse as 'pipe config NN' 3453 * so we swap the two arguments. 3454 */ 3455 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3456 char *p = av[0]; 3457 av[0] = av[1]; 3458 av[1] = p; 3459 } 3460 if (!strncmp(*av, "add", strlen(*av))) 3461 add(ac, av); 3462 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3463 config_pipe(ac, av); 3464 else if (!strncmp(*av, "delete", strlen(*av))) 3465 delete(ac, av); 3466 else if (!strncmp(*av, "flush", strlen(*av))) 3467 flush(); 3468 else if (!strncmp(*av, "zero", strlen(*av))) 3469 zero(ac, av); 3470 else if (!strncmp(*av, "resetlog", strlen(*av))) 3471 resetlog(ac, av); 3472 else if (!strncmp(*av, "print", strlen(*av)) || 3473 !strncmp(*av, "list", strlen(*av))) 3474 list(ac, av); 3475 else if (!strncmp(*av, "enable", strlen(*av))) 3476 sysctl_handler(ac, av, 1); 3477 else if (!strncmp(*av, "disable", strlen(*av))) 3478 sysctl_handler(ac, av, 0); 3479 else if (!strncmp(*av, "set", strlen(*av))) 3480 sets_handler(ac, av); 3481 else if (!strncmp(*av, "show", strlen(*av))) { 3482 do_acct++; 3483 list(ac, av); 3484 } else 3485 errx(EX_USAGE, "bad command `%s'", *av); 3486 return 0; 3487 } 3488 3489 3490 static void 3491 ipfw_readfile(int ac, char *av[]) 3492 { 3493 #define MAX_ARGS 32 3494 #define WHITESP " \t\f\v\n\r" 3495 char buf[BUFSIZ]; 3496 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3497 char linename[10]; 3498 int i=0, lineno=0, qflag=0, pflag=0, status; 3499 FILE *f = NULL; 3500 pid_t preproc = 0; 3501 int c; 3502 3503 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 3504 switch(c) { 3505 case 'D': 3506 if (!pflag) 3507 errx(EX_USAGE, "-D requires -p"); 3508 if (i > MAX_ARGS - 2) 3509 errx(EX_USAGE, 3510 "too many -D or -U options"); 3511 args[i++] = "-D"; 3512 args[i++] = optarg; 3513 break; 3514 3515 case 'U': 3516 if (!pflag) 3517 errx(EX_USAGE, "-U requires -p"); 3518 if (i > MAX_ARGS - 2) 3519 errx(EX_USAGE, 3520 "too many -D or -U options"); 3521 args[i++] = "-U"; 3522 args[i++] = optarg; 3523 break; 3524 3525 case 'p': 3526 pflag = 1; 3527 cmd = optarg; 3528 args[0] = cmd; 3529 i = 1; 3530 break; 3531 3532 case 'q': 3533 qflag = 1; 3534 break; 3535 3536 default: 3537 errx(EX_USAGE, "bad arguments, for usage" 3538 " summary ``ipfw''"); 3539 } 3540 3541 av += optind; 3542 ac -= optind; 3543 if (ac != 1) 3544 errx(EX_USAGE, "extraneous filename arguments"); 3545 3546 if ((f = fopen(av[0], "r")) == NULL) 3547 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3548 3549 if (pflag) { 3550 /* pipe through preprocessor (cpp or m4) */ 3551 int pipedes[2]; 3552 3553 args[i] = 0; 3554 3555 if (pipe(pipedes) == -1) 3556 err(EX_OSERR, "cannot create pipe"); 3557 3558 switch((preproc = fork())) { 3559 case -1: 3560 err(EX_OSERR, "cannot fork"); 3561 3562 case 0: 3563 /* child */ 3564 if (dup2(fileno(f), 0) == -1 3565 || dup2(pipedes[1], 1) == -1) 3566 err(EX_OSERR, "dup2()"); 3567 fclose(f); 3568 close(pipedes[1]); 3569 close(pipedes[0]); 3570 execvp(cmd, args); 3571 err(EX_OSERR, "execvp(%s) failed", cmd); 3572 3573 default: 3574 /* parent */ 3575 fclose(f); 3576 close(pipedes[1]); 3577 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3578 int savederrno = errno; 3579 3580 kill(preproc, SIGTERM); 3581 errno = savederrno; 3582 err(EX_OSERR, "fdopen()"); 3583 } 3584 } 3585 } 3586 3587 while (fgets(buf, BUFSIZ, f)) { 3588 lineno++; 3589 sprintf(linename, "Line %d", lineno); 3590 args[0] = linename; 3591 3592 if (*buf == '#') 3593 continue; 3594 if ((p = strchr(buf, '#')) != NULL) 3595 *p = '\0'; 3596 i = 1; 3597 if (qflag) 3598 args[i++] = "-q"; 3599 for (a = strtok(buf, WHITESP); 3600 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3601 args[i] = a; 3602 if (i == (qflag? 2: 1)) 3603 continue; 3604 if (i == MAX_ARGS) 3605 errx(EX_USAGE, "%s: too many arguments", 3606 linename); 3607 args[i] = NULL; 3608 3609 ipfw_main(i, args); 3610 } 3611 fclose(f); 3612 if (pflag) { 3613 if (waitpid(preproc, &status, 0) == -1) 3614 errx(EX_OSERR, "waitpid()"); 3615 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3616 errx(EX_UNAVAILABLE, 3617 "preprocessor exited with status %d", 3618 WEXITSTATUS(status)); 3619 else if (WIFSIGNALED(status)) 3620 errx(EX_UNAVAILABLE, 3621 "preprocessor exited with signal %d", 3622 WTERMSIG(status)); 3623 } 3624 } 3625 3626 int 3627 main(int ac, char *av[]) 3628 { 3629 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3630 if (s < 0) 3631 err(EX_UNAVAILABLE, "socket"); 3632 3633 /* 3634 * If the last argument is an absolute pathname, interpret it 3635 * as a file to be preprocessed. 3636 */ 3637 3638 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3639 ipfw_readfile(ac, av); 3640 else 3641 ipfw_main(ac, av); 3642 return EX_OK; 3643 } 3644