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 * $FreeBSD$ 21 */ 22 23 #include <sys/param.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 #include <sys/time.h> 29 #include <sys/wait.h> 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <limits.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <stdarg.h> 42 #include <string.h> 43 #include <timeconv.h> 44 #include <unistd.h> 45 #include <sysexits.h> 46 47 #include <net/if.h> 48 #include <netinet/in.h> 49 #include <netinet/in_systm.h> 50 #include <netinet/ip.h> 51 #include <netinet/ip_icmp.h> 52 #include <netinet/ip_fw.h> 53 #include <net/route.h> /* def. of struct route */ 54 #include <netinet/ip_dummynet.h> 55 #include <netinet/tcp.h> 56 #include <arpa/inet.h> 57 58 int s, /* main RAW socket */ 59 do_resolv, /* Would try to resolve all */ 60 do_acct, /* Show packet/byte count */ 61 do_time, /* Show time stamps */ 62 do_quiet, /* Be quiet in add and flush */ 63 do_force, /* Don't ask for confirmation */ 64 do_pipe, /* this cmd refers to a pipe */ 65 do_sort, /* field to sort results (0 = no) */ 66 do_dynamic, /* display dynamic rules */ 67 do_expired, /* display expired dynamic rules */ 68 do_compact, /* show rules in compact mode */ 69 show_sets, /* display rule sets */ 70 verbose; 71 72 #define IP_MASK_ALL 0xffffffff 73 74 /* 75 * structure to hold flag names and associated values to be 76 * set in the appropriate masks. 77 * A NULL string terminates the array. 78 * Often, an element with 0 value contains an error string. 79 * 80 */ 81 struct _s_x { 82 char *s; 83 int x; 84 }; 85 86 static struct _s_x f_tcpflags[] = { 87 { "syn", TH_SYN }, 88 { "fin", TH_FIN }, 89 { "ack", TH_ACK }, 90 { "psh", TH_PUSH }, 91 { "rst", TH_RST }, 92 { "urg", TH_URG }, 93 { "tcp flag", 0 }, 94 { NULL, 0 } 95 }; 96 97 static struct _s_x f_tcpopts[] = { 98 { "mss", IP_FW_TCPOPT_MSS }, 99 { "maxseg", IP_FW_TCPOPT_MSS }, 100 { "window", IP_FW_TCPOPT_WINDOW }, 101 { "sack", IP_FW_TCPOPT_SACK }, 102 { "ts", IP_FW_TCPOPT_TS }, 103 { "timestamp", IP_FW_TCPOPT_TS }, 104 { "cc", IP_FW_TCPOPT_CC }, 105 { "tcp option", 0 }, 106 { NULL, 0 } 107 }; 108 109 /* 110 * IP options span the range 0 to 255 so we need to remap them 111 * (though in fact only the low 5 bits are significant). 112 */ 113 static struct _s_x f_ipopts[] = { 114 { "ssrr", IP_FW_IPOPT_SSRR}, 115 { "lsrr", IP_FW_IPOPT_LSRR}, 116 { "rr", IP_FW_IPOPT_RR}, 117 { "ts", IP_FW_IPOPT_TS}, 118 { "ip option", 0 }, 119 { NULL, 0 } 120 }; 121 122 static struct _s_x f_iptos[] = { 123 { "lowdelay", IPTOS_LOWDELAY}, 124 { "throughput", IPTOS_THROUGHPUT}, 125 { "reliability", IPTOS_RELIABILITY}, 126 { "mincost", IPTOS_MINCOST}, 127 { "congestion", IPTOS_CE}, 128 { "ecntransport", IPTOS_ECT}, 129 { "ip tos option", 0}, 130 { NULL, 0 } 131 }; 132 133 static struct _s_x limit_masks[] = { 134 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 135 {"src-addr", DYN_SRC_ADDR}, 136 {"src-port", DYN_SRC_PORT}, 137 {"dst-addr", DYN_DST_ADDR}, 138 {"dst-port", DYN_DST_PORT}, 139 {NULL, 0} 140 }; 141 142 /* 143 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 144 * This is only used in this code. 145 */ 146 #define IPPROTO_ETHERTYPE 0x1000 147 static struct _s_x ether_types[] = { 148 /* 149 * Note, we cannot use "-:&/" in the names because they are field 150 * separators in the type specifications. Also, we use s = NULL as 151 * end-delimiter, because a type of 0 can be legal. 152 */ 153 { "ip", 0x0800 }, 154 { "ipv4", 0x0800 }, 155 { "ipv6", 0x86dd }, 156 { "arp", 0x0806 }, 157 { "rarp", 0x8035 }, 158 { "vlan", 0x8100 }, 159 { "loop", 0x9000 }, 160 { "trail", 0x1000 }, 161 { "at", 0x809b }, 162 { "atalk", 0x809b }, 163 { "aarp", 0x80f3 }, 164 { "pppoe_disc", 0x8863 }, 165 { "pppoe_sess", 0x8864 }, 166 { "ipx_8022", 0x00E0 }, 167 { "ipx_8023", 0x0000 }, 168 { "ipx_ii", 0x8137 }, 169 { "ipx_snap", 0x8137 }, 170 { "ipx", 0x8137 }, 171 { "ns", 0x0600 }, 172 { NULL, 0 } 173 }; 174 175 static void show_usage(void); 176 177 enum tokens { 178 TOK_NULL=0, 179 180 TOK_OR, 181 TOK_NOT, 182 TOK_STARTBRACE, 183 TOK_ENDBRACE, 184 185 TOK_ACCEPT, 186 TOK_COUNT, 187 TOK_PIPE, 188 TOK_QUEUE, 189 TOK_DIVERT, 190 TOK_TEE, 191 TOK_FORWARD, 192 TOK_SKIPTO, 193 TOK_DENY, 194 TOK_REJECT, 195 TOK_RESET, 196 TOK_UNREACH, 197 TOK_CHECKSTATE, 198 199 TOK_UID, 200 TOK_GID, 201 TOK_IN, 202 TOK_LIMIT, 203 TOK_KEEPSTATE, 204 TOK_LAYER2, 205 TOK_OUT, 206 TOK_XMIT, 207 TOK_RECV, 208 TOK_VIA, 209 TOK_FRAG, 210 TOK_IPOPTS, 211 TOK_IPLEN, 212 TOK_IPID, 213 TOK_IPPRECEDENCE, 214 TOK_IPTOS, 215 TOK_IPTTL, 216 TOK_IPVER, 217 TOK_ESTAB, 218 TOK_SETUP, 219 TOK_TCPFLAGS, 220 TOK_TCPOPTS, 221 TOK_TCPSEQ, 222 TOK_TCPACK, 223 TOK_TCPWIN, 224 TOK_ICMPTYPES, 225 TOK_MAC, 226 TOK_MACTYPE, 227 TOK_VERREVPATH, 228 TOK_IPSEC, 229 230 TOK_PLR, 231 TOK_NOERROR, 232 TOK_BUCKETS, 233 TOK_DSTIP, 234 TOK_SRCIP, 235 TOK_DSTPORT, 236 TOK_SRCPORT, 237 TOK_ALL, 238 TOK_MASK, 239 TOK_BW, 240 TOK_DELAY, 241 TOK_RED, 242 TOK_GRED, 243 TOK_DROPTAIL, 244 TOK_PROTO, 245 TOK_WEIGHT, 246 }; 247 248 struct _s_x dummynet_params[] = { 249 { "plr", TOK_PLR }, 250 { "noerror", TOK_NOERROR }, 251 { "buckets", TOK_BUCKETS }, 252 { "dst-ip", TOK_DSTIP }, 253 { "src-ip", TOK_SRCIP }, 254 { "dst-port", TOK_DSTPORT }, 255 { "src-port", TOK_SRCPORT }, 256 { "proto", TOK_PROTO }, 257 { "weight", TOK_WEIGHT }, 258 { "all", TOK_ALL }, 259 { "mask", TOK_MASK }, 260 { "droptail", TOK_DROPTAIL }, 261 { "red", TOK_RED }, 262 { "gred", TOK_GRED }, 263 { "bw", TOK_BW }, 264 { "bandwidth", TOK_BW }, 265 { "delay", TOK_DELAY }, 266 { "pipe", TOK_PIPE }, 267 { "queue", TOK_QUEUE }, 268 { "dummynet-params", TOK_NULL }, 269 { NULL, 0 } 270 }; 271 272 struct _s_x rule_actions[] = { 273 { "accept", TOK_ACCEPT }, 274 { "pass", TOK_ACCEPT }, 275 { "allow", TOK_ACCEPT }, 276 { "permit", TOK_ACCEPT }, 277 { "count", TOK_COUNT }, 278 { "pipe", TOK_PIPE }, 279 { "queue", TOK_QUEUE }, 280 { "divert", TOK_DIVERT }, 281 { "tee", TOK_TEE }, 282 { "fwd", TOK_FORWARD }, 283 { "forward", TOK_FORWARD }, 284 { "skipto", TOK_SKIPTO }, 285 { "deny", TOK_DENY }, 286 { "drop", TOK_DENY }, 287 { "reject", TOK_REJECT }, 288 { "reset", TOK_RESET }, 289 { "unreach", TOK_UNREACH }, 290 { "check-state", TOK_CHECKSTATE }, 291 { NULL, TOK_NULL }, 292 { NULL, 0 } 293 }; 294 295 struct _s_x rule_options[] = { 296 { "uid", TOK_UID }, 297 { "gid", TOK_GID }, 298 { "in", TOK_IN }, 299 { "limit", TOK_LIMIT }, 300 { "keep-state", TOK_KEEPSTATE }, 301 { "bridged", TOK_LAYER2 }, 302 { "layer2", TOK_LAYER2 }, 303 { "out", TOK_OUT }, 304 { "xmit", TOK_XMIT }, 305 { "recv", TOK_RECV }, 306 { "via", TOK_VIA }, 307 { "fragment", TOK_FRAG }, 308 { "frag", TOK_FRAG }, 309 { "ipoptions", TOK_IPOPTS }, 310 { "ipopts", TOK_IPOPTS }, 311 { "iplen", TOK_IPLEN }, 312 { "ipid", TOK_IPID }, 313 { "ipprecedence", TOK_IPPRECEDENCE }, 314 { "iptos", TOK_IPTOS }, 315 { "ipttl", TOK_IPTTL }, 316 { "ipversion", TOK_IPVER }, 317 { "ipver", TOK_IPVER }, 318 { "estab", TOK_ESTAB }, 319 { "established", TOK_ESTAB }, 320 { "setup", TOK_SETUP }, 321 { "tcpflags", TOK_TCPFLAGS }, 322 { "tcpflgs", TOK_TCPFLAGS }, 323 { "tcpoptions", TOK_TCPOPTS }, 324 { "tcpopts", TOK_TCPOPTS }, 325 { "tcpseq", TOK_TCPSEQ }, 326 { "tcpack", TOK_TCPACK }, 327 { "tcpwin", TOK_TCPWIN }, 328 { "icmptype", TOK_ICMPTYPES }, 329 { "icmptypes", TOK_ICMPTYPES }, 330 { "dst-ip", TOK_DSTIP }, 331 { "src-ip", TOK_SRCIP }, 332 { "dst-port", TOK_DSTPORT }, 333 { "src-port", TOK_SRCPORT }, 334 { "proto", TOK_PROTO }, 335 { "MAC", TOK_MAC }, 336 { "mac", TOK_MAC }, 337 { "mac-type", TOK_MACTYPE }, 338 { "verrevpath", TOK_VERREVPATH }, 339 { "ipsec", TOK_IPSEC }, 340 341 { "not", TOK_NOT }, /* pseudo option */ 342 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 343 { "or", TOK_OR }, /* pseudo option */ 344 { "|", /* escape */ TOK_OR }, /* pseudo option */ 345 { "{", TOK_STARTBRACE }, /* pseudo option */ 346 { "(", TOK_STARTBRACE }, /* pseudo option */ 347 { "}", TOK_ENDBRACE }, /* pseudo option */ 348 { ")", TOK_ENDBRACE }, /* pseudo option */ 349 { NULL, TOK_NULL }, 350 { NULL, 0 } 351 }; 352 353 static __inline u_int64_t 354 align_uint64(u_int64_t *pll) { 355 u_int64_t ret; 356 357 bcopy (pll, &ret, sizeof(ret)); 358 return ret; 359 }; 360 361 /** 362 * match_token takes a table and a string, returns the value associated 363 * with the string (0 meaning an error in most cases) 364 */ 365 static int 366 match_token(struct _s_x *table, char *string) 367 { 368 struct _s_x *pt; 369 int i = strlen(string); 370 371 for (pt = table ; i && pt->s != NULL ; pt++) 372 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 373 return pt->x; 374 return -1; 375 }; 376 377 static char * 378 match_value(struct _s_x *p, u_int32_t value) 379 { 380 for (; p->s != NULL; p++) 381 if (p->x == value) 382 return p->s; 383 return NULL; 384 } 385 386 /* 387 * prints one port, symbolic or numeric 388 */ 389 static void 390 print_port(int proto, u_int16_t port) 391 { 392 393 if (proto == IPPROTO_ETHERTYPE) { 394 char *s; 395 396 if (do_resolv && (s = match_value(ether_types, port)) ) 397 printf("%s", s); 398 else 399 printf("0x%04x", port); 400 } else { 401 struct servent *se = NULL; 402 if (do_resolv) { 403 struct protoent *pe = getprotobynumber(proto); 404 405 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 406 } 407 if (se) 408 printf("%s", se->s_name); 409 else 410 printf("%d", port); 411 } 412 } 413 414 /* 415 * print the values in a list of ports 416 * XXX todo: add support for mask. 417 */ 418 static void 419 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 420 { 421 u_int16_t *p = cmd->ports; 422 int i; 423 char *sep; 424 425 if (cmd->o.len & F_NOT) 426 printf(" not"); 427 if (opcode != 0) { 428 switch (opcode) { 429 case O_IP_DSTPORT: 430 sep = "dst-port"; 431 break; 432 case O_IP_SRCPORT: 433 sep = "src-port"; 434 break; 435 case O_IPID: 436 sep = "ipid"; 437 break; 438 case O_IPLEN: 439 sep = "iplen"; 440 break; 441 case O_IPTTL: 442 sep = "ipttl"; 443 break; 444 case O_MAC_TYPE: 445 sep = "mac-type"; 446 break; 447 default: 448 sep = "???"; 449 break; 450 } 451 printf (" %s", sep); 452 } 453 sep = " "; 454 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 455 printf(sep); 456 print_port(proto, p[0]); 457 if (p[0] != p[1]) { 458 printf("-"); 459 print_port(proto, p[1]); 460 } 461 sep = ","; 462 } 463 } 464 465 /* 466 * Like strtol, but also translates service names into port numbers 467 * for some protocols. 468 * In particular: 469 * proto == -1 disables the protocol check; 470 * proto == IPPROTO_ETHERTYPE looks up an internal table 471 * proto == <some value in /etc/protocols> matches the values there. 472 * Returns *end == s in case the parameter is not found. 473 */ 474 static int 475 strtoport(char *s, char **end, int base, int proto) 476 { 477 char *p, *buf; 478 char *s1; 479 int i; 480 481 *end = s; /* default - not found */ 482 if ( *s == '\0') 483 return 0; /* not found */ 484 485 if (isdigit(*s)) 486 return strtol(s, end, base); 487 488 /* 489 * find separator. '\\' escapes the next char. 490 */ 491 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 492 if (*s1 == '\\' && s1[1] != '\0') 493 s1++; 494 495 buf = malloc(s1 - s + 1); 496 if (buf == NULL) 497 return 0; 498 499 /* 500 * copy into a buffer skipping backslashes 501 */ 502 for (p = s, i = 0; p != s1 ; p++) 503 if ( *p != '\\') 504 buf[i++] = *p; 505 buf[i++] = '\0'; 506 507 if (proto == IPPROTO_ETHERTYPE) { 508 i = match_token(ether_types, buf); 509 free(buf); 510 if (i != -1) { /* found */ 511 *end = s1; 512 return i; 513 } 514 } else { 515 struct protoent *pe = NULL; 516 struct servent *se; 517 518 if (proto != 0) 519 pe = getprotobynumber(proto); 520 setservent(1); 521 se = getservbyname(buf, pe ? pe->p_name : NULL); 522 free(buf); 523 if (se != NULL) { 524 *end = s1; 525 return ntohs(se->s_port); 526 } 527 } 528 return 0; /* not found */ 529 } 530 531 /* 532 * fill the body of the command with the list of port ranges. 533 * At the moment it only understands numeric ranges. 534 */ 535 static int 536 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 537 { 538 u_int16_t *p = cmd->ports; 539 int i = 0; 540 char *s = av; 541 542 while (*s) { 543 u_int16_t a, b; 544 545 a = strtoport(av, &s, 0, proto); 546 if (s == av) /* no parameter */ 547 break; 548 if (*s == '-') { /* a range */ 549 av = s+1; 550 b = strtoport(av, &s, 0, proto); 551 if (s == av) /* no parameter */ 552 break; 553 p[0] = a; 554 p[1] = b; 555 } else if (*s == ',' || *s == '\0' ) { 556 p[0] = p[1] = a; 557 } else { /* invalid separator */ 558 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 559 *s, av); 560 } 561 i++; 562 p += 2; 563 av = s+1; 564 } 565 if (i > 0) { 566 if (i+1 > F_LEN_MASK) 567 errx(EX_DATAERR, "too many ports/ranges\n"); 568 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 569 } 570 return i; 571 } 572 573 static struct _s_x icmpcodes[] = { 574 { "net", ICMP_UNREACH_NET }, 575 { "host", ICMP_UNREACH_HOST }, 576 { "protocol", ICMP_UNREACH_PROTOCOL }, 577 { "port", ICMP_UNREACH_PORT }, 578 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 579 { "srcfail", ICMP_UNREACH_SRCFAIL }, 580 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 581 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 582 { "isolated", ICMP_UNREACH_ISOLATED }, 583 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 584 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 585 { "tosnet", ICMP_UNREACH_TOSNET }, 586 { "toshost", ICMP_UNREACH_TOSHOST }, 587 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 588 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 589 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 590 { NULL, 0 } 591 }; 592 593 static void 594 fill_reject_code(u_short *codep, char *str) 595 { 596 int val; 597 char *s; 598 599 val = strtoul(str, &s, 0); 600 if (s == str || *s != '\0' || val >= 0x100) 601 val = match_token(icmpcodes, str); 602 if (val < 0) 603 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 604 *codep = val; 605 return; 606 } 607 608 static void 609 print_reject_code(u_int16_t code) 610 { 611 char *s = match_value(icmpcodes, code); 612 613 if (s != NULL) 614 printf("unreach %s", s); 615 else 616 printf("unreach %u", code); 617 } 618 619 /* 620 * Returns the number of bits set (from left) in a contiguous bitmask, 621 * or -1 if the mask is not contiguous. 622 * XXX this needs a proper fix. 623 * This effectively works on masks in big-endian (network) format. 624 * when compiled on little endian architectures. 625 * 626 * First bit is bit 7 of the first byte -- note, for MAC addresses, 627 * the first bit on the wire is bit 0 of the first byte. 628 * len is the max length in bits. 629 */ 630 static int 631 contigmask(u_char *p, int len) 632 { 633 int i, n; 634 for (i=0; i<len ; i++) 635 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 636 break; 637 for (n=i+1; n < len; n++) 638 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 639 return -1; /* mask not contiguous */ 640 return i; 641 } 642 643 /* 644 * print flags set/clear in the two bitmasks passed as parameters. 645 * There is a specialized check for f_tcpflags. 646 */ 647 static void 648 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 649 { 650 char *comma=""; 651 int i; 652 u_char set = cmd->arg1 & 0xff; 653 u_char clear = (cmd->arg1 >> 8) & 0xff; 654 655 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 656 printf(" setup"); 657 return; 658 } 659 660 printf(" %s ", name); 661 for (i=0; list[i].x != 0; i++) { 662 if (set & list[i].x) { 663 set &= ~list[i].x; 664 printf("%s%s", comma, list[i].s); 665 comma = ","; 666 } 667 if (clear & list[i].x) { 668 clear &= ~list[i].x; 669 printf("%s!%s", comma, list[i].s); 670 comma = ","; 671 } 672 } 673 } 674 675 /* 676 * Print the ip address contained in a command. 677 */ 678 static void 679 print_ip(ipfw_insn_ip *cmd, char *s) 680 { 681 struct hostent *he = NULL; 682 int mb; 683 684 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 685 686 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 687 printf("me"); 688 return; 689 } 690 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 691 u_int32_t x, *d; 692 int i, j; 693 char comma = '{'; 694 695 x = cmd->o.arg1 - 1; 696 x = htonl( ~x ); 697 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 698 printf("%s/%d", inet_ntoa(cmd->addr), 699 contigmask((u_char *)&x, 32)); 700 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 701 x &= 0xff; /* base */ 702 d = (u_int32_t *)&(cmd->mask); 703 /* 704 * Print bits and ranges. 705 * Locate first bit set (i), then locate first bit unset (j). 706 * If we have 3+ consecutive bits set, then print them as a 707 * range, otherwise only print the initial bit and rescan. 708 */ 709 for (i=0; i < cmd->o.arg1; i++) 710 if (d[i/32] & (1<<(i & 31))) { 711 for (j=i+1; j < cmd->o.arg1; j++) 712 if (!(d[ j/32] & (1<<(j & 31)))) 713 break; 714 printf("%c%d", comma, i+x); 715 if (j>i+2) { /* range has at least 3 elements */ 716 printf("-%d", j-1+x); 717 i = j-1; 718 } 719 comma = ','; 720 } 721 printf("}"); 722 return; 723 } 724 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 725 mb = 32; 726 else 727 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 728 if (mb == 32 && do_resolv) 729 he = gethostbyaddr((char *)&(cmd->addr.s_addr), 730 sizeof(u_long), AF_INET); 731 if (he != NULL) /* resolved to name */ 732 printf("%s", he->h_name); 733 else if (mb == 0) /* any */ 734 printf("any"); 735 else { /* numeric IP followed by some kind of mask */ 736 printf("%s", inet_ntoa(cmd->addr)); 737 if (mb < 0) 738 printf(":%s", inet_ntoa(cmd->mask)); 739 else if (mb < 32) 740 printf("/%d", mb); 741 } 742 } 743 744 /* 745 * prints a MAC address/mask pair 746 */ 747 static void 748 print_mac(u_char *addr, u_char *mask) 749 { 750 int l = contigmask(mask, 48); 751 752 if (l == 0) 753 printf(" any"); 754 else { 755 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 756 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 757 if (l == -1) 758 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 759 mask[0], mask[1], mask[2], 760 mask[3], mask[4], mask[5]); 761 else if (l < 48) 762 printf("/%d", l); 763 } 764 } 765 766 static void 767 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 768 { 769 u_int8_t type; 770 771 cmd->d[0] = 0; 772 while (*av) { 773 if (*av == ',') 774 av++; 775 776 type = strtoul(av, &av, 0); 777 778 if (*av != ',' && *av != '\0') 779 errx(EX_DATAERR, "invalid ICMP type"); 780 781 if (type > 31) 782 errx(EX_DATAERR, "ICMP type out of range"); 783 784 cmd->d[0] |= 1 << type; 785 } 786 cmd->o.opcode = O_ICMPTYPE; 787 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 788 } 789 790 static void 791 print_icmptypes(ipfw_insn_u32 *cmd) 792 { 793 int i; 794 char sep= ' '; 795 796 printf(" icmptypes"); 797 for (i = 0; i < 32; i++) { 798 if ( (cmd->d[0] & (1 << (i))) == 0) 799 continue; 800 printf("%c%d", sep, i); 801 sep = ','; 802 } 803 } 804 805 /* 806 * show_ipfw() prints the body of an ipfw rule. 807 * Because the standard rule has at least proto src_ip dst_ip, we use 808 * a helper function to produce these entries if not provided explicitly. 809 * The first argument is the list of fields we have, the second is 810 * the list of fields we want to be printed. 811 * 812 * Special cases if we have provided a MAC header: 813 * + if the rule does not contain IP addresses/ports, do not print them; 814 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 815 * 816 * Once we have 'have_options', IP header fields are printed as options. 817 */ 818 #define HAVE_PROTO 0x0001 819 #define HAVE_SRCIP 0x0002 820 #define HAVE_DSTIP 0x0004 821 #define HAVE_MAC 0x0008 822 #define HAVE_MACTYPE 0x0010 823 #define HAVE_OPTIONS 0x8000 824 825 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 826 static void 827 show_prerequisites(int *flags, int want, int cmd) 828 { 829 if ( (*flags & HAVE_IP) == HAVE_IP) 830 *flags |= HAVE_OPTIONS; 831 832 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 833 cmd != O_MAC_TYPE) { 834 /* 835 * mac-type was optimized out by the compiler, 836 * restore it 837 */ 838 printf(" any"); 839 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 840 return; 841 } 842 if ( !(*flags & HAVE_OPTIONS)) { 843 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 844 printf(" ip"); 845 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 846 printf(" from any"); 847 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 848 printf(" to any"); 849 } 850 *flags |= want; 851 } 852 853 static void 854 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 855 { 856 static int twidth = 0; 857 int l; 858 ipfw_insn *cmd; 859 int proto = 0; /* default */ 860 int flags = 0; /* prerequisites */ 861 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 862 int or_block = 0; /* we are in an or block */ 863 u_int32_t set_disable; 864 865 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 866 867 if (set_disable & (1 << rule->set)) { /* disabled */ 868 if (!show_sets) 869 return; 870 else 871 printf("# DISABLED "); 872 } 873 printf("%05u ", rule->rulenum); 874 875 if (do_acct) 876 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 877 bcwidth, align_uint64(&rule->bcnt)); 878 879 if (do_time) { 880 char timestr[30]; 881 time_t t = (time_t)0; 882 883 if (twidth == 0) { 884 strcpy(timestr, ctime(&t)); 885 *strchr(timestr, '\n') = '\0'; 886 twidth = strlen(timestr); 887 } 888 if (rule->timestamp) { 889 t = _long_to_time(rule->timestamp); 890 891 strcpy(timestr, ctime(&t)); 892 *strchr(timestr, '\n') = '\0'; 893 printf("%s ", timestr); 894 } else { 895 printf("%*s", twidth, " "); 896 } 897 } 898 899 if (show_sets) 900 printf("set %d ", rule->set); 901 902 /* 903 * print the optional "match probability" 904 */ 905 if (rule->cmd_len > 0) { 906 cmd = rule->cmd ; 907 if (cmd->opcode == O_PROB) { 908 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 909 double d = 1.0 * p->d[0]; 910 911 d = (d / 0x7fffffff); 912 printf("prob %f ", d); 913 } 914 } 915 916 /* 917 * first print actions 918 */ 919 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 920 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 921 switch(cmd->opcode) { 922 case O_CHECK_STATE: 923 printf("check-state"); 924 flags = HAVE_IP; /* avoid printing anything else */ 925 break; 926 927 case O_ACCEPT: 928 printf("allow"); 929 break; 930 931 case O_COUNT: 932 printf("count"); 933 break; 934 935 case O_DENY: 936 printf("deny"); 937 break; 938 939 case O_REJECT: 940 if (cmd->arg1 == ICMP_REJECT_RST) 941 printf("reset"); 942 else if (cmd->arg1 == ICMP_UNREACH_HOST) 943 printf("reject"); 944 else 945 print_reject_code(cmd->arg1); 946 break; 947 948 case O_SKIPTO: 949 printf("skipto %u", cmd->arg1); 950 break; 951 952 case O_PIPE: 953 printf("pipe %u", cmd->arg1); 954 break; 955 956 case O_QUEUE: 957 printf("queue %u", cmd->arg1); 958 break; 959 960 case O_DIVERT: 961 printf("divert %u", cmd->arg1); 962 break; 963 964 case O_TEE: 965 printf("tee %u", cmd->arg1); 966 break; 967 968 case O_FORWARD_IP: 969 { 970 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 971 972 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 973 if (s->sa.sin_port) 974 printf(",%d", s->sa.sin_port); 975 } 976 break; 977 978 case O_LOG: /* O_LOG is printed last */ 979 logptr = (ipfw_insn_log *)cmd; 980 break; 981 982 default: 983 printf("** unrecognized action %d len %d", 984 cmd->opcode, cmd->len); 985 } 986 } 987 if (logptr) { 988 if (logptr->max_log > 0) 989 printf(" log logamount %d", logptr->max_log); 990 else 991 printf(" log"); 992 } 993 994 /* 995 * then print the body. 996 */ 997 if (rule->_pad & 1) { /* empty rules before options */ 998 if (!do_compact) 999 printf(" ip from any to any"); 1000 flags |= HAVE_IP | HAVE_OPTIONS; 1001 } 1002 1003 for (l = rule->act_ofs, cmd = rule->cmd ; 1004 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1005 /* useful alias */ 1006 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1007 1008 show_prerequisites(&flags, 0, cmd->opcode); 1009 1010 switch(cmd->opcode) { 1011 case O_PROB: 1012 break; /* done already */ 1013 1014 case O_PROBE_STATE: 1015 break; /* no need to print anything here */ 1016 1017 case O_MACADDR2: { 1018 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1019 1020 if ((cmd->len & F_OR) && !or_block) 1021 printf(" {"); 1022 if (cmd->len & F_NOT) 1023 printf(" not"); 1024 printf(" MAC"); 1025 flags |= HAVE_MAC; 1026 print_mac( m->addr, m->mask); 1027 print_mac( m->addr + 6, m->mask + 6); 1028 } 1029 break; 1030 1031 case O_MAC_TYPE: 1032 if ((cmd->len & F_OR) && !or_block) 1033 printf(" {"); 1034 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1035 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1036 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1037 break; 1038 1039 case O_IP_SRC: 1040 case O_IP_SRC_MASK: 1041 case O_IP_SRC_ME: 1042 case O_IP_SRC_SET: 1043 show_prerequisites(&flags, HAVE_PROTO, 0); 1044 if (!(flags & HAVE_SRCIP)) 1045 printf(" from"); 1046 if ((cmd->len & F_OR) && !or_block) 1047 printf(" {"); 1048 print_ip((ipfw_insn_ip *)cmd, 1049 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1050 flags |= HAVE_SRCIP; 1051 break; 1052 1053 case O_IP_DST: 1054 case O_IP_DST_MASK: 1055 case O_IP_DST_ME: 1056 case O_IP_DST_SET: 1057 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1058 if (!(flags & HAVE_DSTIP)) 1059 printf(" to"); 1060 if ((cmd->len & F_OR) && !or_block) 1061 printf(" {"); 1062 print_ip((ipfw_insn_ip *)cmd, 1063 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1064 flags |= HAVE_DSTIP; 1065 break; 1066 1067 case O_IP_DSTPORT: 1068 show_prerequisites(&flags, HAVE_IP, 0); 1069 case O_IP_SRCPORT: 1070 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1071 if ((cmd->len & F_OR) && !or_block) 1072 printf(" {"); 1073 print_newports((ipfw_insn_u16 *)cmd, proto, 1074 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1075 break; 1076 1077 case O_PROTO: { 1078 struct protoent *pe; 1079 1080 if ((cmd->len & F_OR) && !or_block) 1081 printf(" {"); 1082 if (cmd->len & F_NOT) 1083 printf(" not"); 1084 proto = cmd->arg1; 1085 pe = getprotobynumber(cmd->arg1); 1086 if (flags & HAVE_OPTIONS) 1087 printf(" proto"); 1088 if (pe) 1089 printf(" %s", pe->p_name); 1090 else 1091 printf(" %u", cmd->arg1); 1092 } 1093 flags |= HAVE_PROTO; 1094 break; 1095 1096 default: /*options ... */ 1097 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1098 if ((cmd->len & F_OR) && !or_block) 1099 printf(" {"); 1100 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1101 printf(" not"); 1102 switch(cmd->opcode) { 1103 case O_FRAG: 1104 printf(" frag"); 1105 break; 1106 1107 case O_IN: 1108 printf(cmd->len & F_NOT ? " out" : " in"); 1109 break; 1110 1111 case O_LAYER2: 1112 printf(" layer2"); 1113 break; 1114 case O_XMIT: 1115 case O_RECV: 1116 case O_VIA: { 1117 char *s; 1118 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1119 1120 if (cmd->opcode == O_XMIT) 1121 s = "xmit"; 1122 else if (cmd->opcode == O_RECV) 1123 s = "recv"; 1124 else if (cmd->opcode == O_VIA) 1125 s = "via"; 1126 if (cmdif->name[0] == '\0') 1127 printf(" %s %s", s, 1128 inet_ntoa(cmdif->p.ip)); 1129 else if (cmdif->p.unit == -1) 1130 printf(" %s %s*", s, cmdif->name); 1131 else 1132 printf(" %s %s%d", s, cmdif->name, 1133 cmdif->p.unit); 1134 } 1135 break; 1136 1137 case O_IPID: 1138 if (F_LEN(cmd) == 1) 1139 printf(" ipid %u", cmd->arg1 ); 1140 else 1141 print_newports((ipfw_insn_u16 *)cmd, 0, 1142 O_IPID); 1143 break; 1144 1145 case O_IPTTL: 1146 if (F_LEN(cmd) == 1) 1147 printf(" ipttl %u", cmd->arg1 ); 1148 else 1149 print_newports((ipfw_insn_u16 *)cmd, 0, 1150 O_IPTTL); 1151 break; 1152 1153 case O_IPVER: 1154 printf(" ipver %u", cmd->arg1 ); 1155 break; 1156 1157 case O_IPPRECEDENCE: 1158 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1159 break; 1160 1161 case O_IPLEN: 1162 if (F_LEN(cmd) == 1) 1163 printf(" iplen %u", cmd->arg1 ); 1164 else 1165 print_newports((ipfw_insn_u16 *)cmd, 0, 1166 O_IPLEN); 1167 break; 1168 1169 case O_IPOPT: 1170 print_flags("ipoptions", cmd, f_ipopts); 1171 break; 1172 1173 case O_IPTOS: 1174 print_flags("iptos", cmd, f_iptos); 1175 break; 1176 1177 case O_ICMPTYPE: 1178 print_icmptypes((ipfw_insn_u32 *)cmd); 1179 break; 1180 1181 case O_ESTAB: 1182 printf(" established"); 1183 break; 1184 1185 case O_TCPFLAGS: 1186 print_flags("tcpflags", cmd, f_tcpflags); 1187 break; 1188 1189 case O_TCPOPTS: 1190 print_flags("tcpoptions", cmd, f_tcpopts); 1191 break; 1192 1193 case O_TCPWIN: 1194 printf(" tcpwin %d", ntohs(cmd->arg1)); 1195 break; 1196 1197 case O_TCPACK: 1198 printf(" tcpack %d", ntohl(cmd32->d[0])); 1199 break; 1200 1201 case O_TCPSEQ: 1202 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1203 break; 1204 1205 case O_UID: 1206 { 1207 struct passwd *pwd = getpwuid(cmd32->d[0]); 1208 1209 if (pwd) 1210 printf(" uid %s", pwd->pw_name); 1211 else 1212 printf(" uid %u", cmd32->d[0]); 1213 } 1214 break; 1215 1216 case O_GID: 1217 { 1218 struct group *grp = getgrgid(cmd32->d[0]); 1219 1220 if (grp) 1221 printf(" gid %s", grp->gr_name); 1222 else 1223 printf(" gid %u", cmd32->d[0]); 1224 } 1225 break; 1226 1227 case O_VERREVPATH: 1228 printf(" verrevpath"); 1229 break; 1230 1231 case O_IPSEC: 1232 printf(" ipsec"); 1233 break; 1234 1235 case O_KEEP_STATE: 1236 printf(" keep-state"); 1237 break; 1238 1239 case O_LIMIT: 1240 { 1241 struct _s_x *p = limit_masks; 1242 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1243 u_int8_t x = c->limit_mask; 1244 char *comma = " "; 1245 1246 printf(" limit"); 1247 for ( ; p->x != 0 ; p++) 1248 if ((x & p->x) == p->x) { 1249 x &= ~p->x; 1250 printf("%s%s", comma, p->s); 1251 comma = ","; 1252 } 1253 printf(" %d", c->conn_limit); 1254 } 1255 break; 1256 1257 default: 1258 printf(" [opcode %d len %d]", 1259 cmd->opcode, cmd->len); 1260 } 1261 } 1262 if (cmd->len & F_OR) { 1263 printf(" or"); 1264 or_block = 1; 1265 } else if (or_block) { 1266 printf(" }"); 1267 or_block = 0; 1268 } 1269 } 1270 show_prerequisites(&flags, HAVE_IP, 0); 1271 1272 printf("\n"); 1273 } 1274 1275 static void 1276 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1277 { 1278 struct protoent *pe; 1279 struct in_addr a; 1280 uint16_t rulenum; 1281 1282 if (!do_expired) { 1283 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1284 return; 1285 } 1286 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1287 printf("%05d %*llu %*llu (%ds)", rulenum, pcwidth, 1288 align_uint64(&d->pcnt), bcwidth, 1289 align_uint64(&d->bcnt), d->expire); 1290 switch (d->dyn_type) { 1291 case O_LIMIT_PARENT: 1292 printf(" PARENT %d", d->count); 1293 break; 1294 case O_LIMIT: 1295 printf(" LIMIT"); 1296 break; 1297 case O_KEEP_STATE: /* bidir, no mask */ 1298 printf(" STATE"); 1299 break; 1300 } 1301 1302 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1303 printf(" %s", pe->p_name); 1304 else 1305 printf(" proto %u", d->id.proto); 1306 1307 a.s_addr = htonl(d->id.src_ip); 1308 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1309 1310 a.s_addr = htonl(d->id.dst_ip); 1311 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1312 printf("\n"); 1313 } 1314 1315 int 1316 sort_q(const void *pa, const void *pb) 1317 { 1318 int rev = (do_sort < 0); 1319 int field = rev ? -do_sort : do_sort; 1320 long long res = 0; 1321 const struct dn_flow_queue *a = pa; 1322 const struct dn_flow_queue *b = pb; 1323 1324 switch (field) { 1325 case 1: /* pkts */ 1326 res = a->len - b->len; 1327 break; 1328 case 2: /* bytes */ 1329 res = a->len_bytes - b->len_bytes; 1330 break; 1331 1332 case 3: /* tot pkts */ 1333 res = a->tot_pkts - b->tot_pkts; 1334 break; 1335 1336 case 4: /* tot bytes */ 1337 res = a->tot_bytes - b->tot_bytes; 1338 break; 1339 } 1340 if (res < 0) 1341 res = -1; 1342 if (res > 0) 1343 res = 1; 1344 return (int)(rev ? res : -res); 1345 } 1346 1347 static void 1348 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1349 { 1350 int l; 1351 1352 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1353 fs->flow_mask.proto, 1354 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1355 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1356 if (fs->rq_elements == 0) 1357 return; 1358 1359 printf("BKT Prot ___Source IP/port____ " 1360 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1361 if (do_sort != 0) 1362 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1363 for (l = 0; l < fs->rq_elements; l++) { 1364 struct in_addr ina; 1365 struct protoent *pe; 1366 1367 ina.s_addr = htonl(q[l].id.src_ip); 1368 printf("%3d ", q[l].hash_slot); 1369 pe = getprotobynumber(q[l].id.proto); 1370 if (pe) 1371 printf("%-4s ", pe->p_name); 1372 else 1373 printf("%4u ", q[l].id.proto); 1374 printf("%15s/%-5d ", 1375 inet_ntoa(ina), q[l].id.src_port); 1376 ina.s_addr = htonl(q[l].id.dst_ip); 1377 printf("%15s/%-5d ", 1378 inet_ntoa(ina), q[l].id.dst_port); 1379 printf("%4qu %8qu %2u %4u %3u\n", 1380 q[l].tot_pkts, q[l].tot_bytes, 1381 q[l].len, q[l].len_bytes, q[l].drops); 1382 if (verbose) 1383 printf(" S %20qd F %20qd\n", 1384 q[l].S, q[l].F); 1385 } 1386 } 1387 1388 static void 1389 print_flowset_parms(struct dn_flow_set *fs, char *prefix) 1390 { 1391 int l; 1392 char qs[30]; 1393 char plr[30]; 1394 char red[90]; /* Display RED parameters */ 1395 1396 l = fs->qsize; 1397 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1398 if (l >= 8192) 1399 sprintf(qs, "%d KB", l / 1024); 1400 else 1401 sprintf(qs, "%d B", l); 1402 } else 1403 sprintf(qs, "%3d sl.", l); 1404 if (fs->plr) 1405 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1406 else 1407 plr[0] = '\0'; 1408 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1409 sprintf(red, 1410 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1411 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1412 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1413 SCALE_VAL(fs->min_th), 1414 SCALE_VAL(fs->max_th), 1415 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1416 else 1417 sprintf(red, "droptail"); 1418 1419 printf("%s %s%s %d queues (%d buckets) %s\n", 1420 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1421 } 1422 1423 static void 1424 list_pipes(void *data, int nbytes, int ac, char *av[]) 1425 { 1426 u_long rulenum; 1427 void *next = data; 1428 struct dn_pipe *p = (struct dn_pipe *) data; 1429 struct dn_flow_set *fs; 1430 struct dn_flow_queue *q; 1431 int l; 1432 1433 if (ac > 0) 1434 rulenum = strtoul(*av++, NULL, 10); 1435 else 1436 rulenum = 0; 1437 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 1438 double b = p->bandwidth; 1439 char buf[30]; 1440 char prefix[80]; 1441 1442 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 1443 break; /* done with pipes, now queues */ 1444 1445 /* 1446 * compute length, as pipe have variable size 1447 */ 1448 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1449 next = (void *)p + l; 1450 nbytes -= l; 1451 1452 if (rulenum != 0 && rulenum != p->pipe_nr) 1453 continue; 1454 1455 /* 1456 * Print rate (or clocking interface) 1457 */ 1458 if (p->if_name[0] != '\0') 1459 sprintf(buf, "%s", p->if_name); 1460 else if (b == 0) 1461 sprintf(buf, "unlimited"); 1462 else if (b >= 1000000) 1463 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1464 else if (b >= 1000) 1465 sprintf(buf, "%7.3f Kbit/s", b/1000); 1466 else 1467 sprintf(buf, "%7.3f bit/s ", b); 1468 1469 sprintf(prefix, "%05d: %s %4d ms ", 1470 p->pipe_nr, buf, p->delay); 1471 print_flowset_parms(&(p->fs), prefix); 1472 if (verbose) 1473 printf(" V %20qd\n", p->V >> MY_M); 1474 1475 q = (struct dn_flow_queue *)(p+1); 1476 list_queues(&(p->fs), q); 1477 } 1478 for (fs = next; nbytes >= sizeof *fs; fs = next) { 1479 char prefix[80]; 1480 1481 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 1482 break; 1483 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1484 next = (void *)fs + l; 1485 nbytes -= l; 1486 q = (struct dn_flow_queue *)(fs+1); 1487 sprintf(prefix, "q%05d: weight %d pipe %d ", 1488 fs->fs_nr, fs->weight, fs->parent_nr); 1489 print_flowset_parms(fs, prefix); 1490 list_queues(fs, q); 1491 } 1492 } 1493 1494 /* 1495 * This one handles all set-related commands 1496 * ipfw set { show | enable | disable } 1497 * ipfw set swap X Y 1498 * ipfw set move X to Y 1499 * ipfw set move rule X to Y 1500 */ 1501 static void 1502 sets_handler(int ac, char *av[]) 1503 { 1504 u_int32_t set_disable, masks[2]; 1505 int i, nbytes; 1506 u_int16_t rulenum; 1507 u_int8_t cmd, new_set; 1508 1509 ac--; 1510 av++; 1511 1512 if (!ac) 1513 errx(EX_USAGE, "set needs command"); 1514 if (!strncmp(*av, "show", strlen(*av)) ) { 1515 void *data; 1516 char *msg; 1517 1518 nbytes = sizeof(struct ip_fw); 1519 if ((data = malloc(nbytes)) == NULL) 1520 err(EX_OSERR, "malloc"); 1521 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1522 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1523 bcopy(&((struct ip_fw *)data)->next_rule, 1524 &set_disable, sizeof(set_disable)); 1525 1526 for (i = 0, msg = "disable" ; i < 31; i++) 1527 if ( (set_disable & (1<<i))) { 1528 printf("%s %d", msg, i); 1529 msg = ""; 1530 } 1531 msg = (set_disable) ? " enable" : "enable"; 1532 for (i = 0; i < 31; i++) 1533 if ( !(set_disable & (1<<i))) { 1534 printf("%s %d", msg, i); 1535 msg = ""; 1536 } 1537 printf("\n"); 1538 } else if (!strncmp(*av, "swap", strlen(*av))) { 1539 ac--; av++; 1540 if (ac != 2) 1541 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1542 rulenum = atoi(av[0]); 1543 new_set = atoi(av[1]); 1544 if (!isdigit(*(av[0])) || rulenum > 30) 1545 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1546 if (!isdigit(*(av[1])) || new_set > 30) 1547 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1548 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1549 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1550 masks, sizeof(u_int32_t)); 1551 } else if (!strncmp(*av, "move", strlen(*av))) { 1552 ac--; av++; 1553 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1554 cmd = 2; 1555 ac--; av++; 1556 } else 1557 cmd = 3; 1558 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1559 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1560 rulenum = atoi(av[0]); 1561 new_set = atoi(av[2]); 1562 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1563 (cmd == 2 && rulenum == 65535) ) 1564 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1565 if (!isdigit(*(av[2])) || new_set > 30) 1566 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1567 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1568 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1569 masks, sizeof(u_int32_t)); 1570 } else if (!strncmp(*av, "disable", strlen(*av)) || 1571 !strncmp(*av, "enable", strlen(*av)) ) { 1572 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1573 1574 ac--; av++; 1575 masks[0] = masks[1] = 0; 1576 1577 while (ac) { 1578 if (isdigit(**av)) { 1579 i = atoi(*av); 1580 if (i < 0 || i > 30) 1581 errx(EX_DATAERR, 1582 "invalid set number %d\n", i); 1583 masks[which] |= (1<<i); 1584 } else if (!strncmp(*av, "disable", strlen(*av))) 1585 which = 0; 1586 else if (!strncmp(*av, "enable", strlen(*av))) 1587 which = 1; 1588 else 1589 errx(EX_DATAERR, 1590 "invalid set command %s\n", *av); 1591 av++; ac--; 1592 } 1593 if ( (masks[0] & masks[1]) != 0 ) 1594 errx(EX_DATAERR, 1595 "cannot enable and disable the same set\n"); 1596 1597 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1598 if (i) 1599 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1600 } else 1601 errx(EX_USAGE, "invalid set command %s\n", *av); 1602 } 1603 1604 static void 1605 sysctl_handler(int ac, char *av[], int which) 1606 { 1607 ac--; 1608 av++; 1609 1610 if (*av == NULL) { 1611 warnx("missing keyword to enable/disable\n"); 1612 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1613 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1614 &which, sizeof(which)); 1615 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1616 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1617 &which, sizeof(which)); 1618 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1619 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1620 &which, sizeof(which)); 1621 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1622 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1623 &which, sizeof(which)); 1624 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1625 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1626 &which, sizeof(which)); 1627 } else { 1628 warnx("unrecognize enable/disable keyword: %s\n", *av); 1629 } 1630 } 1631 1632 static void 1633 list(int ac, char *av[]) 1634 { 1635 struct ip_fw *r; 1636 ipfw_dyn_rule *dynrules, *d; 1637 1638 void *lim, *data = NULL; 1639 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1640 int exitval = EX_OK; 1641 int lac; 1642 char **lav; 1643 u_long rnum; 1644 char *endptr; 1645 int seen = 0; 1646 1647 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1648 int nalloc = 1024; /* start somewhere... */ 1649 1650 ac--; 1651 av++; 1652 1653 /* get rules or pipes from kernel, resizing array as necessary */ 1654 nbytes = nalloc; 1655 1656 while (nbytes >= nalloc) { 1657 nalloc = nalloc * 2 + 200; 1658 nbytes = nalloc; 1659 if ((data = realloc(data, nbytes)) == NULL) 1660 err(EX_OSERR, "realloc"); 1661 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1662 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1663 do_pipe ? "DUMMYNET" : "FW"); 1664 } 1665 1666 if (do_pipe) { 1667 list_pipes(data, nbytes, ac, av); 1668 goto done; 1669 } 1670 1671 /* 1672 * Count static rules. They have variable size so we 1673 * need to scan the list to count them. 1674 */ 1675 for (nstat = 1, r = data, lim = data + nbytes; 1676 r->rulenum < 65535 && (void *)r < lim; 1677 ++nstat, r = (void *)r + RULESIZE(r) ) 1678 ; /* nothing */ 1679 1680 /* 1681 * Count dynamic rules. This is easier as they have 1682 * fixed size. 1683 */ 1684 r = (void *)r + RULESIZE(r); 1685 dynrules = (ipfw_dyn_rule *)r ; 1686 n = (void *)r - data; 1687 ndyn = (nbytes - n) / sizeof *dynrules; 1688 1689 /* if showing stats, figure out column widths ahead of time */ 1690 bcwidth = pcwidth = 0; 1691 if (do_acct) { 1692 for (n = 0, r = data; n < nstat; 1693 n++, r = (void *)r + RULESIZE(r)) { 1694 /* packet counter */ 1695 width = snprintf(NULL, 0, "%llu", 1696 align_uint64(&r->pcnt)); 1697 if (width > pcwidth) 1698 pcwidth = width; 1699 1700 /* byte counter */ 1701 width = snprintf(NULL, 0, "%llu", 1702 align_uint64(&r->bcnt)); 1703 if (width > bcwidth) 1704 bcwidth = width; 1705 } 1706 } 1707 if (do_dynamic && ndyn) { 1708 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1709 width = snprintf(NULL, 0, "%llu", 1710 align_uint64(&d->pcnt)); 1711 if (width > pcwidth) 1712 pcwidth = width; 1713 1714 width = snprintf(NULL, 0, "%llu", 1715 align_uint64(&d->bcnt)); 1716 if (width > bcwidth) 1717 bcwidth = width; 1718 } 1719 } 1720 /* if no rule numbers were specified, list all rules */ 1721 if (ac == 0) { 1722 for (n = 0, r = data; n < nstat; 1723 n++, r = (void *)r + RULESIZE(r) ) 1724 show_ipfw(r, pcwidth, bcwidth); 1725 1726 if (do_dynamic && ndyn) { 1727 printf("## Dynamic rules (%d):\n", ndyn); 1728 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1729 show_dyn_ipfw(d, pcwidth, bcwidth); 1730 } 1731 goto done; 1732 } 1733 1734 /* display specific rules requested on command line */ 1735 1736 for (lac = ac, lav = av; lac != 0; lac--) { 1737 /* convert command line rule # */ 1738 rnum = strtoul(*lav++, &endptr, 10); 1739 if (*endptr) { 1740 exitval = EX_USAGE; 1741 warnx("invalid rule number: %s", *(lav - 1)); 1742 continue; 1743 } 1744 for (n = seen = 0, r = data; n < nstat; 1745 n++, r = (void *)r + RULESIZE(r) ) { 1746 if (r->rulenum > rnum) 1747 break; 1748 if (r->rulenum == rnum) { 1749 show_ipfw(r, pcwidth, bcwidth); 1750 seen = 1; 1751 } 1752 } 1753 if (!seen) { 1754 /* give precedence to other error(s) */ 1755 if (exitval == EX_OK) 1756 exitval = EX_UNAVAILABLE; 1757 warnx("rule %lu does not exist", rnum); 1758 } 1759 } 1760 1761 if (do_dynamic && ndyn) { 1762 printf("## Dynamic rules:\n"); 1763 for (lac = ac, lav = av; lac != 0; lac--) { 1764 rnum = strtoul(*lav++, &endptr, 10); 1765 if (*endptr) 1766 /* already warned */ 1767 continue; 1768 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1769 uint16_t rulenum; 1770 1771 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1772 if (rulenum > rnum) 1773 break; 1774 if (rulenum == rnum) 1775 show_dyn_ipfw(d, pcwidth, bcwidth); 1776 } 1777 } 1778 } 1779 1780 ac = 0; 1781 1782 done: 1783 free(data); 1784 1785 if (exitval != EX_OK) 1786 exit(exitval); 1787 } 1788 1789 static void 1790 show_usage(void) 1791 { 1792 fprintf(stderr, "usage: ipfw [options]\n" 1793 " add [number] rule\n" 1794 " pipe number config [pipeconfig]\n" 1795 " queue number config [queueconfig]\n" 1796 " [pipe] flush\n" 1797 " [pipe] delete number ...\n" 1798 " [pipe] {list|show} [number ...]\n" 1799 " {zero|resetlog} [number ...]\n" 1800 "do \"ipfw -h\" or see ipfw manpage for details\n" 1801 ); 1802 1803 exit(EX_USAGE); 1804 } 1805 1806 static void 1807 help(void) 1808 { 1809 1810 fprintf(stderr, "ipfw syntax summary:\n" 1811 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1812 "ipfw {pipe|queue} N config BODY\n" 1813 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1814 "\n" 1815 "RULE: [1..] [PROB] BODY\n" 1816 "RULENUM: INTEGER(1..65534)\n" 1817 "PROB: prob REAL(0..1)\n" 1818 "BODY: check-state [LOG] (no body) |\n" 1819 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1820 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1821 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1822 "ADDR: [ MAC dst src ether_type ] \n" 1823 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1824 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1825 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1826 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1827 ); 1828 exit(0); 1829 } 1830 1831 1832 static int 1833 lookup_host (char *host, struct in_addr *ipaddr) 1834 { 1835 struct hostent *he; 1836 1837 if (!inet_aton(host, ipaddr)) { 1838 if ((he = gethostbyname(host)) == NULL) 1839 return(-1); 1840 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1841 } 1842 return(0); 1843 } 1844 1845 /* 1846 * fills the addr and mask fields in the instruction as appropriate from av. 1847 * Update length as appropriate. 1848 * The following formats are allowed: 1849 * any matches any IP. Actually returns an empty instruction. 1850 * me returns O_IP_*_ME 1851 * 1.2.3.4 single IP address 1852 * 1.2.3.4:5.6.7.8 address:mask 1853 * 1.2.3.4/24 address/mask 1854 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1855 */ 1856 static void 1857 fill_ip(ipfw_insn_ip *cmd, char *av) 1858 { 1859 char *p = 0, md = 0; 1860 u_int32_t i; 1861 1862 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1863 1864 if (!strncmp(av, "any", strlen(av))) 1865 return; 1866 1867 if (!strncmp(av, "me", strlen(av))) { 1868 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1869 return; 1870 } 1871 1872 p = strchr(av, '/'); 1873 if (!p) 1874 p = strchr(av, ':'); 1875 if (p) { 1876 md = *p; 1877 *p++ = '\0'; 1878 } 1879 1880 if (lookup_host(av, &cmd->addr) != 0) 1881 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1882 switch (md) { 1883 case ':': 1884 if (!inet_aton(p, &cmd->mask)) 1885 errx(EX_DATAERR, "bad netmask ``%s''", p); 1886 break; 1887 case '/': 1888 i = atoi(p); 1889 if (i == 0) 1890 cmd->mask.s_addr = htonl(0); 1891 else if (i > 32) 1892 errx(EX_DATAERR, "bad width ``%s''", p); 1893 else 1894 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1895 break; 1896 default: 1897 cmd->mask.s_addr = htonl(~0); 1898 break; 1899 } 1900 cmd->addr.s_addr &= cmd->mask.s_addr; 1901 /* 1902 * now look if we have a set of addresses. They are stored as follows: 1903 * arg1 is the set size (powers of 2, 2..256) 1904 * addr is the base address IN HOST FORMAT 1905 * mask.. is an array of u_int32_t with bits set. 1906 */ 1907 if (p) 1908 p = strchr(p, '{'); 1909 if (p) { /* fetch addresses */ 1910 u_int32_t *d; 1911 int low, high; 1912 int i = contigmask((u_char *)&(cmd->mask), 32); 1913 1914 if (i < 24 || i > 31) { 1915 fprintf(stderr, "invalid set with mask %d\n", 1916 i); 1917 exit(0); 1918 } 1919 cmd->o.arg1 = 1<<(32-i); 1920 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1921 d = (u_int32_t *)&cmd->mask; 1922 cmd->o.opcode = O_IP_DST_SET; /* default */ 1923 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1924 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1925 d[i] = 0; /* clear masks */ 1926 1927 av = p+1; 1928 low = cmd->addr.s_addr & 0xff; 1929 high = low + cmd->o.arg1 - 1; 1930 i = -1; /* previous value in a range */ 1931 while (isdigit(*av)) { 1932 char *s; 1933 u_int16_t a = strtol(av, &s, 0); 1934 1935 if (s == av) /* no parameter */ 1936 break; 1937 if (a < low || a > high) { 1938 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1939 a, low, high); 1940 exit(0); 1941 } 1942 a -= low; 1943 if (i == -1) /* no previous in range */ 1944 i = a; 1945 else { /* check that range is valid */ 1946 if (i > a) 1947 errx(EX_DATAERR, "invalid range %d-%d", 1948 i+low, a+low); 1949 if (*s == '-') 1950 errx(EX_DATAERR, "double '-' in range"); 1951 } 1952 for (; i <= a; i++) 1953 d[i/32] |= 1<<(i & 31); 1954 i = -1; 1955 if (*s == '-') 1956 i = a; 1957 else if (*s != ',') 1958 break; 1959 av = s+1; 1960 } 1961 return; 1962 } 1963 1964 if (cmd->mask.s_addr == 0) { /* any */ 1965 if (cmd->o.len & F_NOT) 1966 errx(EX_DATAERR, "not any never matches"); 1967 else /* useless, nuke it */ 1968 return; 1969 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1970 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1971 else /* addr/mask */ 1972 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1973 } 1974 1975 1976 /* 1977 * helper function to process a set of flags and set bits in the 1978 * appropriate masks. 1979 */ 1980 static void 1981 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1982 struct _s_x *flags, char *p) 1983 { 1984 u_int8_t set=0, clear=0; 1985 1986 while (p && *p) { 1987 char *q; /* points to the separator */ 1988 int val; 1989 u_int8_t *which; /* mask we are working on */ 1990 1991 if (*p == '!') { 1992 p++; 1993 which = &clear; 1994 } else 1995 which = &set; 1996 q = strchr(p, ','); 1997 if (q) 1998 *q++ = '\0'; 1999 val = match_token(flags, p); 2000 if (val <= 0) 2001 errx(EX_DATAERR, "invalid flag %s", p); 2002 *which |= (u_int8_t)val; 2003 p = q; 2004 } 2005 cmd->opcode = opcode; 2006 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2007 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2008 } 2009 2010 2011 static void 2012 delete(int ac, char *av[]) 2013 { 2014 u_int32_t rulenum; 2015 struct dn_pipe pipe; 2016 int i; 2017 int exitval = EX_OK; 2018 int do_set = 0; 2019 2020 memset(&pipe, 0, sizeof pipe); 2021 2022 av++; ac--; 2023 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 2024 do_set = 1; /* delete set */ 2025 ac--; av++; 2026 } 2027 2028 /* Rule number */ 2029 while (ac && isdigit(**av)) { 2030 i = atoi(*av); av++; ac--; 2031 if (do_pipe) { 2032 if (do_pipe == 1) 2033 pipe.pipe_nr = i; 2034 else 2035 pipe.fs.fs_nr = i; 2036 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 2037 &pipe, sizeof pipe); 2038 if (i) { 2039 exitval = 1; 2040 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2041 do_pipe == 1 ? pipe.pipe_nr : 2042 pipe.fs.fs_nr); 2043 } 2044 } else { 2045 rulenum = (i & 0xffff) | (do_set << 24); 2046 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 2047 sizeof rulenum); 2048 if (i) { 2049 exitval = EX_UNAVAILABLE; 2050 warn("rule %u: setsockopt(IP_FW_DEL)", 2051 rulenum); 2052 } 2053 } 2054 } 2055 if (exitval != EX_OK) 2056 exit(exitval); 2057 } 2058 2059 2060 /* 2061 * fill the interface structure. We do not check the name as we can 2062 * create interfaces dynamically, so checking them at insert time 2063 * makes relatively little sense. 2064 * A '*' following the name means any unit. 2065 */ 2066 static void 2067 fill_iface(ipfw_insn_if *cmd, char *arg) 2068 { 2069 cmd->name[0] = '\0'; 2070 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2071 2072 /* Parse the interface or address */ 2073 if (!strcmp(arg, "any")) 2074 cmd->o.len = 0; /* effectively ignore this command */ 2075 else if (!isdigit(*arg)) { 2076 char *q; 2077 2078 strncpy(cmd->name, arg, sizeof(cmd->name)); 2079 cmd->name[sizeof(cmd->name) - 1] = '\0'; 2080 /* find first digit or wildcard */ 2081 for (q = cmd->name; *q && !isdigit(*q) && *q != '*'; q++) 2082 continue; 2083 cmd->p.unit = (*q == '*') ? -1 : atoi(q); 2084 *q = '\0'; 2085 } else if (!inet_aton(arg, &cmd->p.ip)) 2086 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2087 } 2088 2089 /* 2090 * the following macro returns an error message if we run out of 2091 * arguments. 2092 */ 2093 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2094 2095 static void 2096 config_pipe(int ac, char **av) 2097 { 2098 struct dn_pipe pipe; 2099 int i; 2100 char *end; 2101 u_int32_t a; 2102 void *par = NULL; 2103 2104 memset(&pipe, 0, sizeof pipe); 2105 2106 av++; ac--; 2107 /* Pipe number */ 2108 if (ac && isdigit(**av)) { 2109 i = atoi(*av); av++; ac--; 2110 if (do_pipe == 1) 2111 pipe.pipe_nr = i; 2112 else 2113 pipe.fs.fs_nr = i; 2114 } 2115 while (ac > 0) { 2116 double d; 2117 int tok = match_token(dummynet_params, *av); 2118 ac--; av++; 2119 2120 switch(tok) { 2121 case TOK_NOERROR: 2122 pipe.fs.flags_fs |= DN_NOERROR; 2123 break; 2124 2125 case TOK_PLR: 2126 NEED1("plr needs argument 0..1\n"); 2127 d = strtod(av[0], NULL); 2128 if (d > 1) 2129 d = 1; 2130 else if (d < 0) 2131 d = 0; 2132 pipe.fs.plr = (int)(d*0x7fffffff); 2133 ac--; av++; 2134 break; 2135 2136 case TOK_QUEUE: 2137 NEED1("queue needs queue size\n"); 2138 end = NULL; 2139 pipe.fs.qsize = strtoul(av[0], &end, 0); 2140 if (*end == 'K' || *end == 'k') { 2141 pipe.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2142 pipe.fs.qsize *= 1024; 2143 } else if (*end == 'B' || !strncmp(end, "by", 2)) { 2144 pipe.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2145 } 2146 ac--; av++; 2147 break; 2148 2149 case TOK_BUCKETS: 2150 NEED1("buckets needs argument\n"); 2151 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2152 ac--; av++; 2153 break; 2154 2155 case TOK_MASK: 2156 NEED1("mask needs mask specifier\n"); 2157 /* 2158 * per-flow queue, mask is dst_ip, dst_port, 2159 * src_ip, src_port, proto measured in bits 2160 */ 2161 par = NULL; 2162 2163 pipe.fs.flow_mask.dst_ip = 0; 2164 pipe.fs.flow_mask.src_ip = 0; 2165 pipe.fs.flow_mask.dst_port = 0; 2166 pipe.fs.flow_mask.src_port = 0; 2167 pipe.fs.flow_mask.proto = 0; 2168 end = NULL; 2169 2170 while (ac >= 1) { 2171 u_int32_t *p32 = NULL; 2172 u_int16_t *p16 = NULL; 2173 2174 tok = match_token(dummynet_params, *av); 2175 ac--; av++; 2176 switch(tok) { 2177 case TOK_ALL: 2178 /* 2179 * special case, all bits significant 2180 */ 2181 pipe.fs.flow_mask.dst_ip = ~0; 2182 pipe.fs.flow_mask.src_ip = ~0; 2183 pipe.fs.flow_mask.dst_port = ~0; 2184 pipe.fs.flow_mask.src_port = ~0; 2185 pipe.fs.flow_mask.proto = ~0; 2186 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2187 goto end_mask; 2188 2189 case TOK_DSTIP: 2190 p32 = &pipe.fs.flow_mask.dst_ip; 2191 break; 2192 2193 case TOK_SRCIP: 2194 p32 = &pipe.fs.flow_mask.src_ip; 2195 break; 2196 2197 case TOK_DSTPORT: 2198 p16 = &pipe.fs.flow_mask.dst_port; 2199 break; 2200 2201 case TOK_SRCPORT: 2202 p16 = &pipe.fs.flow_mask.src_port; 2203 break; 2204 2205 case TOK_PROTO: 2206 break; 2207 2208 default: 2209 ac++; av--; /* backtrack */ 2210 goto end_mask; 2211 } 2212 if (ac < 1) 2213 errx(EX_USAGE, "mask: value missing"); 2214 if (*av[0] == '/') { 2215 a = strtoul(av[0]+1, &end, 0); 2216 a = (a == 32) ? ~0 : (1 << a) - 1; 2217 } else 2218 a = strtoul(av[0], &end, 0); 2219 if (p32 != NULL) 2220 *p32 = a; 2221 else if (p16 != NULL) { 2222 if (a > 65535) 2223 errx(EX_DATAERR, 2224 "mask: must be 16 bit"); 2225 *p16 = (u_int16_t)a; 2226 } else { 2227 if (a > 255) 2228 errx(EX_DATAERR, 2229 "mask: must be 8 bit"); 2230 pipe.fs.flow_mask.proto = (u_int8_t)a; 2231 } 2232 if (a != 0) 2233 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2234 ac--; av++; 2235 } /* end while, config masks */ 2236 end_mask: 2237 break; 2238 2239 case TOK_RED: 2240 case TOK_GRED: 2241 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2242 pipe.fs.flags_fs |= DN_IS_RED; 2243 if (tok == TOK_GRED) 2244 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2245 /* 2246 * the format for parameters is w_q/min_th/max_th/max_p 2247 */ 2248 if ((end = strsep(&av[0], "/"))) { 2249 double w_q = strtod(end, NULL); 2250 if (w_q > 1 || w_q <= 0) 2251 errx(EX_DATAERR, "0 < w_q <= 1"); 2252 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2253 } 2254 if ((end = strsep(&av[0], "/"))) { 2255 pipe.fs.min_th = strtoul(end, &end, 0); 2256 if (*end == 'K' || *end == 'k') 2257 pipe.fs.min_th *= 1024; 2258 } 2259 if ((end = strsep(&av[0], "/"))) { 2260 pipe.fs.max_th = strtoul(end, &end, 0); 2261 if (*end == 'K' || *end == 'k') 2262 pipe.fs.max_th *= 1024; 2263 } 2264 if ((end = strsep(&av[0], "/"))) { 2265 double max_p = strtod(end, NULL); 2266 if (max_p > 1 || max_p <= 0) 2267 errx(EX_DATAERR, "0 < max_p <= 1"); 2268 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2269 } 2270 ac--; av++; 2271 break; 2272 2273 case TOK_DROPTAIL: 2274 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2275 break; 2276 2277 case TOK_BW: 2278 NEED1("bw needs bandwidth or interface\n"); 2279 if (do_pipe != 1) 2280 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2281 /* 2282 * set clocking interface or bandwidth value 2283 */ 2284 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 2285 int l = sizeof(pipe.if_name)-1; 2286 /* interface name */ 2287 strncpy(pipe.if_name, av[0], l); 2288 pipe.if_name[l] = '\0'; 2289 pipe.bandwidth = 0; 2290 } else { 2291 pipe.if_name[0] = '\0'; 2292 pipe.bandwidth = strtoul(av[0], &end, 0); 2293 if (*end == 'K' || *end == 'k') { 2294 end++; 2295 pipe.bandwidth *= 1000; 2296 } else if (*end == 'M') { 2297 end++; 2298 pipe.bandwidth *= 1000000; 2299 } 2300 if (*end == 'B' || !strncmp(end, "by", 2)) 2301 pipe.bandwidth *= 8; 2302 if (pipe.bandwidth < 0) 2303 errx(EX_DATAERR, "bandwidth too large"); 2304 } 2305 ac--; av++; 2306 break; 2307 2308 case TOK_DELAY: 2309 if (do_pipe != 1) 2310 errx(EX_DATAERR, "delay only valid for pipes"); 2311 NEED1("delay needs argument 0..10000ms\n"); 2312 pipe.delay = strtoul(av[0], NULL, 0); 2313 ac--; av++; 2314 break; 2315 2316 case TOK_WEIGHT: 2317 if (do_pipe == 1) 2318 errx(EX_DATAERR,"weight only valid for queues"); 2319 NEED1("weight needs argument 0..100\n"); 2320 pipe.fs.weight = strtoul(av[0], &end, 0); 2321 ac--; av++; 2322 break; 2323 2324 case TOK_PIPE: 2325 if (do_pipe == 1) 2326 errx(EX_DATAERR,"pipe only valid for queues"); 2327 NEED1("pipe needs pipe_number\n"); 2328 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2329 ac--; av++; 2330 break; 2331 2332 default: 2333 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2334 } 2335 } 2336 if (do_pipe == 1) { 2337 if (pipe.pipe_nr == 0) 2338 errx(EX_DATAERR, "pipe_nr must be > 0"); 2339 if (pipe.delay > 10000) 2340 errx(EX_DATAERR, "delay must be < 10000"); 2341 } else { /* do_pipe == 2, queue */ 2342 if (pipe.fs.parent_nr == 0) 2343 errx(EX_DATAERR, "pipe must be > 0"); 2344 if (pipe.fs.weight >100) 2345 errx(EX_DATAERR, "weight must be <= 100"); 2346 } 2347 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2348 if (pipe.fs.qsize > 1024*1024) 2349 errx(EX_DATAERR, "queue size must be < 1MB"); 2350 } else { 2351 if (pipe.fs.qsize > 100) 2352 errx(EX_DATAERR, "2 <= queue size <= 100"); 2353 } 2354 if (pipe.fs.flags_fs & DN_IS_RED) { 2355 size_t len; 2356 int lookup_depth, avg_pkt_size; 2357 double s, idle, weight, w_q; 2358 struct clockinfo clock; 2359 int t; 2360 2361 if (pipe.fs.min_th >= pipe.fs.max_th) 2362 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2363 pipe.fs.min_th, pipe.fs.max_th); 2364 if (pipe.fs.max_th == 0) 2365 errx(EX_DATAERR, "max_th must be > 0"); 2366 2367 len = sizeof(int); 2368 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2369 &lookup_depth, &len, NULL, 0) == -1) 2370 2371 errx(1, "sysctlbyname(\"%s\")", 2372 "net.inet.ip.dummynet.red_lookup_depth"); 2373 if (lookup_depth == 0) 2374 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2375 " must be greater than zero"); 2376 2377 len = sizeof(int); 2378 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2379 &avg_pkt_size, &len, NULL, 0) == -1) 2380 2381 errx(1, "sysctlbyname(\"%s\")", 2382 "net.inet.ip.dummynet.red_avg_pkt_size"); 2383 if (avg_pkt_size == 0) 2384 errx(EX_DATAERR, 2385 "net.inet.ip.dummynet.red_avg_pkt_size must" 2386 " be greater than zero"); 2387 2388 len = sizeof(struct clockinfo); 2389 if (sysctlbyname("kern.clockrate", &clock, &len, NULL, 0) == -1) 2390 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 2391 2392 /* 2393 * Ticks needed for sending a medium-sized packet. 2394 * Unfortunately, when we are configuring a WF2Q+ queue, we 2395 * do not have bandwidth information, because that is stored 2396 * in the parent pipe, and also we have multiple queues 2397 * competing for it. So we set s=0, which is not very 2398 * correct. But on the other hand, why do we want RED with 2399 * WF2Q+ ? 2400 */ 2401 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2402 s = 0; 2403 else 2404 s = clock.hz * avg_pkt_size * 8 / pipe.bandwidth; 2405 2406 /* 2407 * max idle time (in ticks) before avg queue size becomes 0. 2408 * NOTA: (3/w_q) is approx the value x so that 2409 * (1-w_q)^x < 10^-3. 2410 */ 2411 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2412 idle = s * 3. / w_q; 2413 pipe.fs.lookup_step = (int)idle / lookup_depth; 2414 if (!pipe.fs.lookup_step) 2415 pipe.fs.lookup_step = 1; 2416 weight = 1 - w_q; 2417 for (t = pipe.fs.lookup_step; t > 0; --t) 2418 weight *= weight; 2419 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2420 } 2421 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2422 sizeof pipe); 2423 if (i) 2424 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2425 } 2426 2427 static void 2428 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2429 { 2430 int i, l; 2431 2432 for (i=0; i<6; i++) 2433 addr[i] = mask[i] = 0; 2434 if (!strcmp(p, "any")) 2435 return; 2436 2437 for (i=0; *p && i<6;i++, p++) { 2438 addr[i] = strtol(p, &p, 16); 2439 if (*p != ':') /* we start with the mask */ 2440 break; 2441 } 2442 if (*p == '/') { /* mask len */ 2443 l = strtol(p+1, &p, 0); 2444 for (i=0; l>0; l -=8, i++) 2445 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2446 } else if (*p == '&') { /* mask */ 2447 for (i=0, p++; *p && i<6;i++, p++) { 2448 mask[i] = strtol(p, &p, 16); 2449 if (*p != ':') 2450 break; 2451 } 2452 } else if (*p == '\0') { 2453 for (i=0; i<6; i++) 2454 mask[i] = 0xff; 2455 } 2456 for (i=0; i<6; i++) 2457 addr[i] &= mask[i]; 2458 } 2459 2460 /* 2461 * helper function, updates the pointer to cmd with the length 2462 * of the current command, and also cleans up the first word of 2463 * the new command in case it has been clobbered before. 2464 */ 2465 static ipfw_insn * 2466 next_cmd(ipfw_insn *cmd) 2467 { 2468 cmd += F_LEN(cmd); 2469 bzero(cmd, sizeof(*cmd)); 2470 return cmd; 2471 } 2472 2473 /* 2474 * A function to fill simple commands of size 1. 2475 * Existing flags are preserved. 2476 */ 2477 static void 2478 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2479 { 2480 cmd->opcode = opcode; 2481 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2482 cmd->arg1 = arg; 2483 } 2484 2485 /* 2486 * Fetch and add the MAC address and type, with masks. This generates one or 2487 * two microinstructions, and returns the pointer to the last one. 2488 */ 2489 static ipfw_insn * 2490 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2491 { 2492 ipfw_insn_mac *mac; 2493 2494 if (ac < 2) 2495 errx(EX_DATAERR, "MAC dst src"); 2496 2497 cmd->opcode = O_MACADDR2; 2498 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2499 2500 mac = (ipfw_insn_mac *)cmd; 2501 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2502 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2503 return cmd; 2504 } 2505 2506 static ipfw_insn * 2507 add_mactype(ipfw_insn *cmd, int ac, char *av) 2508 { 2509 if (ac < 1) 2510 errx(EX_DATAERR, "missing MAC type"); 2511 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2512 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2513 cmd->opcode = O_MAC_TYPE; 2514 return cmd; 2515 } else 2516 return NULL; 2517 } 2518 2519 static ipfw_insn * 2520 add_proto(ipfw_insn *cmd, char *av) 2521 { 2522 struct protoent *pe; 2523 u_char proto = 0; 2524 2525 if (!strncmp(av, "all", strlen(av))) 2526 ; /* same as "ip" */ 2527 else if ((proto = atoi(av)) > 0) 2528 ; /* all done! */ 2529 else if ((pe = getprotobyname(av)) != NULL) 2530 proto = pe->p_proto; 2531 else 2532 return NULL; 2533 if (proto != IPPROTO_IP) 2534 fill_cmd(cmd, O_PROTO, 0, proto); 2535 return cmd; 2536 } 2537 2538 static ipfw_insn * 2539 add_srcip(ipfw_insn *cmd, char *av) 2540 { 2541 fill_ip((ipfw_insn_ip *)cmd, av); 2542 if (cmd->opcode == O_IP_DST_SET) /* set */ 2543 cmd->opcode = O_IP_SRC_SET; 2544 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2545 cmd->opcode = O_IP_SRC_ME; 2546 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2547 cmd->opcode = O_IP_SRC; 2548 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2549 cmd->opcode = O_IP_SRC_MASK; 2550 return cmd; 2551 } 2552 2553 static ipfw_insn * 2554 add_dstip(ipfw_insn *cmd, char *av) 2555 { 2556 fill_ip((ipfw_insn_ip *)cmd, av); 2557 if (cmd->opcode == O_IP_DST_SET) /* set */ 2558 ; 2559 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2560 cmd->opcode = O_IP_DST_ME; 2561 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2562 cmd->opcode = O_IP_DST; 2563 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2564 cmd->opcode = O_IP_DST_MASK; 2565 return cmd; 2566 } 2567 2568 static ipfw_insn * 2569 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2570 { 2571 if (!strncmp(av, "any", strlen(av))) { 2572 return NULL; 2573 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2574 /* XXX todo: check that we have a protocol with ports */ 2575 cmd->opcode = opcode; 2576 return cmd; 2577 } 2578 return NULL; 2579 } 2580 2581 /* 2582 * Parse arguments and assemble the microinstructions which make up a rule. 2583 * Rules are added into the 'rulebuf' and then copied in the correct order 2584 * into the actual rule. 2585 * 2586 * The syntax for a rule starts with the action, followed by an 2587 * optional log action, and the various match patterns. 2588 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 2589 * (generated if the rule includes a keep-state option), then the 2590 * various match patterns, the "log" action, and the actual action. 2591 * 2592 */ 2593 static void 2594 add(int ac, char *av[]) 2595 { 2596 /* 2597 * rules are added into the 'rulebuf' and then copied in 2598 * the correct order into the actual rule. 2599 * Some things that need to go out of order (prob, action etc.) 2600 * go into actbuf[]. 2601 */ 2602 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2603 2604 ipfw_insn *src, *dst, *cmd, *action, *prev; 2605 ipfw_insn *first_cmd; /* first match pattern */ 2606 2607 struct ip_fw *rule; 2608 2609 /* 2610 * various flags used to record that we entered some fields. 2611 */ 2612 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2613 2614 int i; 2615 2616 int open_par = 0; /* open parenthesis ( */ 2617 2618 /* proto is here because it is used to fetch ports */ 2619 u_char proto = IPPROTO_IP; /* default protocol */ 2620 2621 double match_prob = 1; /* match probability, default is always match */ 2622 2623 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2624 bzero(cmdbuf, sizeof(cmdbuf)); 2625 bzero(rulebuf, sizeof(rulebuf)); 2626 2627 rule = (struct ip_fw *)rulebuf; 2628 cmd = (ipfw_insn *)cmdbuf; 2629 action = (ipfw_insn *)actbuf; 2630 2631 av++; ac--; 2632 2633 /* [rule N] -- Rule number optional */ 2634 if (ac && isdigit(**av)) { 2635 rule->rulenum = atoi(*av); 2636 av++; 2637 ac--; 2638 } 2639 2640 /* [set N] -- set number (0..30), optional */ 2641 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2642 int set = strtoul(av[1], NULL, 10); 2643 if (set < 0 || set > 30) 2644 errx(EX_DATAERR, "illegal set %s", av[1]); 2645 rule->set = set; 2646 av += 2; ac -= 2; 2647 } 2648 2649 /* [prob D] -- match probability, optional */ 2650 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2651 match_prob = strtod(av[1], NULL); 2652 2653 if (match_prob <= 0 || match_prob > 1) 2654 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2655 av += 2; ac -= 2; 2656 } 2657 2658 /* action -- mandatory */ 2659 NEED1("missing action"); 2660 i = match_token(rule_actions, *av); 2661 ac--; av++; 2662 action->len = 1; /* default */ 2663 switch(i) { 2664 case TOK_CHECKSTATE: 2665 have_state = action; 2666 action->opcode = O_CHECK_STATE; 2667 break; 2668 2669 case TOK_ACCEPT: 2670 action->opcode = O_ACCEPT; 2671 break; 2672 2673 case TOK_DENY: 2674 action->opcode = O_DENY; 2675 action->arg1 = 0; 2676 break; 2677 2678 case TOK_REJECT: 2679 action->opcode = O_REJECT; 2680 action->arg1 = ICMP_UNREACH_HOST; 2681 break; 2682 2683 case TOK_RESET: 2684 action->opcode = O_REJECT; 2685 action->arg1 = ICMP_REJECT_RST; 2686 break; 2687 2688 case TOK_UNREACH: 2689 action->opcode = O_REJECT; 2690 NEED1("missing reject code"); 2691 fill_reject_code(&action->arg1, *av); 2692 ac--; av++; 2693 break; 2694 2695 case TOK_COUNT: 2696 action->opcode = O_COUNT; 2697 break; 2698 2699 case TOK_QUEUE: 2700 case TOK_PIPE: 2701 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2702 case TOK_SKIPTO: 2703 if (i == TOK_QUEUE) 2704 action->opcode = O_QUEUE; 2705 else if (i == TOK_PIPE) 2706 action->opcode = O_PIPE; 2707 else if (i == TOK_SKIPTO) 2708 action->opcode = O_SKIPTO; 2709 NEED1("missing skipto/pipe/queue number"); 2710 action->arg1 = strtoul(*av, NULL, 10); 2711 av++; ac--; 2712 break; 2713 2714 case TOK_DIVERT: 2715 case TOK_TEE: 2716 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2717 NEED1("missing divert/tee port"); 2718 action->arg1 = strtoul(*av, NULL, 0); 2719 if (action->arg1 == 0) { 2720 struct servent *s; 2721 setservent(1); 2722 s = getservbyname(av[0], "divert"); 2723 if (s != NULL) 2724 action->arg1 = ntohs(s->s_port); 2725 else 2726 errx(EX_DATAERR, "illegal divert/tee port"); 2727 } 2728 ac--; av++; 2729 break; 2730 2731 case TOK_FORWARD: { 2732 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2733 char *s, *end; 2734 2735 NEED1("missing forward address[:port]"); 2736 2737 action->opcode = O_FORWARD_IP; 2738 action->len = F_INSN_SIZE(ipfw_insn_sa); 2739 2740 p->sa.sin_len = sizeof(struct sockaddr_in); 2741 p->sa.sin_family = AF_INET; 2742 p->sa.sin_port = 0; 2743 /* 2744 * locate the address-port separator (':' or ',') 2745 */ 2746 s = strchr(*av, ':'); 2747 if (s == NULL) 2748 s = strchr(*av, ','); 2749 if (s != NULL) { 2750 *(s++) = '\0'; 2751 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2752 if (s == end) 2753 errx(EX_DATAERR, 2754 "illegal forwarding port ``%s''", s); 2755 p->sa.sin_port = (u_short)i; 2756 } 2757 lookup_host(*av, &(p->sa.sin_addr)); 2758 } 2759 ac--; av++; 2760 break; 2761 2762 default: 2763 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2764 } 2765 action = next_cmd(action); 2766 2767 /* 2768 * [log [logamount N]] -- log, optional 2769 * 2770 * If exists, it goes first in the cmdbuf, but then it is 2771 * skipped in the copy section to the end of the buffer. 2772 */ 2773 if (ac && !strncmp(*av, "log", strlen(*av))) { 2774 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2775 2776 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2777 cmd->opcode = O_LOG; 2778 av++; ac--; 2779 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2780 ac--; av++; 2781 NEED1("logamount requires argument"); 2782 c->max_log = atoi(*av); 2783 if (c->max_log < 0) 2784 errx(EX_DATAERR, "logamount must be positive"); 2785 ac--; av++; 2786 } 2787 cmd = next_cmd(cmd); 2788 } 2789 2790 if (have_state) /* must be a check-state, we are done */ 2791 goto done; 2792 2793 #define OR_START(target) \ 2794 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2795 if (open_par) \ 2796 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2797 prev = NULL; \ 2798 open_par = 1; \ 2799 if ( (av[0])[1] == '\0') { \ 2800 ac--; av++; \ 2801 } else \ 2802 (*av)++; \ 2803 } \ 2804 target: \ 2805 2806 2807 #define CLOSE_PAR \ 2808 if (open_par) { \ 2809 if (ac && ( \ 2810 !strncmp(*av, ")", strlen(*av)) || \ 2811 !strncmp(*av, "}", strlen(*av)) )) { \ 2812 prev = NULL; \ 2813 open_par = 0; \ 2814 ac--; av++; \ 2815 } else \ 2816 errx(EX_USAGE, "missing \")\"\n"); \ 2817 } 2818 2819 #define NOT_BLOCK \ 2820 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2821 if (cmd->len & F_NOT) \ 2822 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2823 cmd->len |= F_NOT; \ 2824 ac--; av++; \ 2825 } 2826 2827 #define OR_BLOCK(target) \ 2828 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2829 if (prev == NULL || open_par == 0) \ 2830 errx(EX_DATAERR, "invalid OR block"); \ 2831 prev->len |= F_OR; \ 2832 ac--; av++; \ 2833 goto target; \ 2834 } \ 2835 CLOSE_PAR; 2836 2837 first_cmd = cmd; 2838 2839 #if 0 2840 /* 2841 * MAC addresses, optional. 2842 * If we have this, we skip the part "proto from src to dst" 2843 * and jump straight to the option parsing. 2844 */ 2845 NOT_BLOCK; 2846 NEED1("missing protocol"); 2847 if (!strncmp(*av, "MAC", strlen(*av)) || 2848 !strncmp(*av, "mac", strlen(*av))) { 2849 ac--; av++; /* the "MAC" keyword */ 2850 add_mac(cmd, ac, av); /* exits in case of errors */ 2851 cmd = next_cmd(cmd); 2852 ac -= 2; av += 2; /* dst-mac and src-mac */ 2853 NOT_BLOCK; 2854 NEED1("missing mac type"); 2855 if (add_mactype(cmd, ac, av[0])) 2856 cmd = next_cmd(cmd); 2857 ac--; av++; /* any or mac-type */ 2858 goto read_options; 2859 } 2860 #endif 2861 2862 /* 2863 * protocol, mandatory 2864 */ 2865 OR_START(get_proto); 2866 NOT_BLOCK; 2867 NEED1("missing protocol"); 2868 if (add_proto(cmd, *av)) { 2869 av++; ac--; 2870 if (F_LEN(cmd) == 0) /* plain IP */ 2871 proto = 0; 2872 else { 2873 proto = cmd->arg1; 2874 prev = cmd; 2875 cmd = next_cmd(cmd); 2876 } 2877 } else if (first_cmd != cmd) { 2878 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2879 } else 2880 goto read_options; 2881 OR_BLOCK(get_proto); 2882 2883 /* 2884 * "from", mandatory 2885 */ 2886 if (!ac || strncmp(*av, "from", strlen(*av))) 2887 errx(EX_USAGE, "missing ``from''"); 2888 ac--; av++; 2889 2890 /* 2891 * source IP, mandatory 2892 */ 2893 OR_START(source_ip); 2894 NOT_BLOCK; /* optional "not" */ 2895 NEED1("missing source address"); 2896 if (add_srcip(cmd, *av)) { 2897 ac--; av++; 2898 if (F_LEN(cmd) != 0) { /* ! any */ 2899 prev = cmd; 2900 cmd = next_cmd(cmd); 2901 } 2902 } 2903 OR_BLOCK(source_ip); 2904 2905 /* 2906 * source ports, optional 2907 */ 2908 NOT_BLOCK; /* optional "not" */ 2909 if (ac) { 2910 if (!strncmp(*av, "any", strlen(*av)) || 2911 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2912 ac--; av++; 2913 if (F_LEN(cmd) != 0) 2914 cmd = next_cmd(cmd); 2915 } 2916 } 2917 2918 /* 2919 * "to", mandatory 2920 */ 2921 if (!ac || strncmp(*av, "to", strlen(*av))) 2922 errx(EX_USAGE, "missing ``to''"); 2923 av++; ac--; 2924 2925 /* 2926 * destination, mandatory 2927 */ 2928 OR_START(dest_ip); 2929 NOT_BLOCK; /* optional "not" */ 2930 NEED1("missing dst address"); 2931 if (add_dstip(cmd, *av)) { 2932 ac--; av++; 2933 if (F_LEN(cmd) != 0) { /* ! any */ 2934 prev = cmd; 2935 cmd = next_cmd(cmd); 2936 } 2937 } 2938 OR_BLOCK(dest_ip); 2939 2940 /* 2941 * dest. ports, optional 2942 */ 2943 NOT_BLOCK; /* optional "not" */ 2944 if (ac) { 2945 if (!strncmp(*av, "any", strlen(*av)) || 2946 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2947 ac--; av++; 2948 if (F_LEN(cmd) != 0) 2949 cmd = next_cmd(cmd); 2950 } 2951 } 2952 2953 read_options: 2954 if (ac && first_cmd == cmd) { 2955 /* 2956 * nothing specified so far, store in the rule to ease 2957 * printout later. 2958 */ 2959 rule->_pad = 1; 2960 } 2961 prev = NULL; 2962 while (ac) { 2963 char *s; 2964 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2965 2966 s = *av; 2967 cmd32 = (ipfw_insn_u32 *)cmd; 2968 2969 if (*s == '!') { /* alternate syntax for NOT */ 2970 if (cmd->len & F_NOT) 2971 errx(EX_USAGE, "double \"not\" not allowed\n"); 2972 cmd->len = F_NOT; 2973 s++; 2974 } 2975 i = match_token(rule_options, s); 2976 ac--; av++; 2977 switch(i) { 2978 case TOK_NOT: 2979 if (cmd->len & F_NOT) 2980 errx(EX_USAGE, "double \"not\" not allowed\n"); 2981 cmd->len = F_NOT; 2982 break; 2983 2984 case TOK_OR: 2985 if (open_par == 0 || prev == NULL) 2986 errx(EX_USAGE, "invalid \"or\" block\n"); 2987 prev->len |= F_OR; 2988 break; 2989 2990 case TOK_STARTBRACE: 2991 if (open_par) 2992 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2993 open_par = 1; 2994 break; 2995 2996 case TOK_ENDBRACE: 2997 if (!open_par) 2998 errx(EX_USAGE, "+missing \")\"\n"); 2999 open_par = 0; 3000 prev = NULL; 3001 break; 3002 3003 case TOK_IN: 3004 fill_cmd(cmd, O_IN, 0, 0); 3005 break; 3006 3007 case TOK_OUT: 3008 cmd->len ^= F_NOT; /* toggle F_NOT */ 3009 fill_cmd(cmd, O_IN, 0, 0); 3010 break; 3011 3012 case TOK_FRAG: 3013 fill_cmd(cmd, O_FRAG, 0, 0); 3014 break; 3015 3016 case TOK_LAYER2: 3017 fill_cmd(cmd, O_LAYER2, 0, 0); 3018 break; 3019 3020 case TOK_XMIT: 3021 case TOK_RECV: 3022 case TOK_VIA: 3023 NEED1("recv, xmit, via require interface name" 3024 " or address"); 3025 fill_iface((ipfw_insn_if *)cmd, av[0]); 3026 ac--; av++; 3027 if (F_LEN(cmd) == 0) /* not a valid address */ 3028 break; 3029 if (i == TOK_XMIT) 3030 cmd->opcode = O_XMIT; 3031 else if (i == TOK_RECV) 3032 cmd->opcode = O_RECV; 3033 else if (i == TOK_VIA) 3034 cmd->opcode = O_VIA; 3035 break; 3036 3037 case TOK_ICMPTYPES: 3038 NEED1("icmptypes requires list of types"); 3039 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 3040 av++; ac--; 3041 break; 3042 3043 case TOK_IPTTL: 3044 NEED1("ipttl requires TTL"); 3045 if (strpbrk(*av, "-,")) { 3046 if (!add_ports(cmd, *av, 0, O_IPTTL)) 3047 errx(EX_DATAERR, "invalid ipttl %s", *av); 3048 } else 3049 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3050 ac--; av++; 3051 break; 3052 3053 case TOK_IPID: 3054 NEED1("ipid requires id"); 3055 if (strpbrk(*av, "-,")) { 3056 if (!add_ports(cmd, *av, 0, O_IPID)) 3057 errx(EX_DATAERR, "invalid ipid %s", *av); 3058 } else 3059 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3060 ac--; av++; 3061 break; 3062 3063 case TOK_IPLEN: 3064 NEED1("iplen requires length"); 3065 if (strpbrk(*av, "-,")) { 3066 if (!add_ports(cmd, *av, 0, O_IPLEN)) 3067 errx(EX_DATAERR, "invalid ip len %s", *av); 3068 } else 3069 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3070 ac--; av++; 3071 break; 3072 3073 case TOK_IPVER: 3074 NEED1("ipver requires version"); 3075 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3076 ac--; av++; 3077 break; 3078 3079 case TOK_IPPRECEDENCE: 3080 NEED1("ipprecedence requires value"); 3081 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3082 (strtoul(*av, NULL, 0) & 7) << 5); 3083 ac--; av++; 3084 break; 3085 3086 case TOK_IPOPTS: 3087 NEED1("missing argument for ipoptions"); 3088 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3089 ac--; av++; 3090 break; 3091 3092 case TOK_IPTOS: 3093 NEED1("missing argument for iptos"); 3094 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3095 ac--; av++; 3096 break; 3097 3098 case TOK_UID: 3099 NEED1("uid requires argument"); 3100 { 3101 char *end; 3102 uid_t uid; 3103 struct passwd *pwd; 3104 3105 cmd->opcode = O_UID; 3106 uid = strtoul(*av, &end, 0); 3107 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3108 if (pwd == NULL) 3109 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3110 cmd32->d[0] = pwd->pw_uid; 3111 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3112 ac--; av++; 3113 } 3114 break; 3115 3116 case TOK_GID: 3117 NEED1("gid requires argument"); 3118 { 3119 char *end; 3120 gid_t gid; 3121 struct group *grp; 3122 3123 cmd->opcode = O_GID; 3124 gid = strtoul(*av, &end, 0); 3125 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3126 if (grp == NULL) 3127 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3128 cmd32->d[0] = grp->gr_gid; 3129 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3130 ac--; av++; 3131 } 3132 break; 3133 3134 case TOK_ESTAB: 3135 fill_cmd(cmd, O_ESTAB, 0, 0); 3136 break; 3137 3138 case TOK_SETUP: 3139 fill_cmd(cmd, O_TCPFLAGS, 0, 3140 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3141 break; 3142 3143 case TOK_TCPOPTS: 3144 NEED1("missing argument for tcpoptions"); 3145 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3146 ac--; av++; 3147 break; 3148 3149 case TOK_TCPSEQ: 3150 case TOK_TCPACK: 3151 NEED1("tcpseq/tcpack requires argument"); 3152 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3153 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3154 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3155 ac--; av++; 3156 break; 3157 3158 case TOK_TCPWIN: 3159 NEED1("tcpwin requires length"); 3160 fill_cmd(cmd, O_TCPWIN, 0, 3161 htons(strtoul(*av, NULL, 0))); 3162 ac--; av++; 3163 break; 3164 3165 case TOK_TCPFLAGS: 3166 NEED1("missing argument for tcpflags"); 3167 cmd->opcode = O_TCPFLAGS; 3168 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3169 ac--; av++; 3170 break; 3171 3172 case TOK_KEEPSTATE: 3173 if (open_par) 3174 errx(EX_USAGE, "keep-state cannot be part " 3175 "of an or block"); 3176 if (have_state) 3177 errx(EX_USAGE, "only one of keep-state " 3178 "and limit is allowed"); 3179 have_state = cmd; 3180 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3181 break; 3182 3183 case TOK_LIMIT: 3184 if (open_par) 3185 errx(EX_USAGE, "limit cannot be part " 3186 "of an or block"); 3187 if (have_state) 3188 errx(EX_USAGE, "only one of keep-state " 3189 "and limit is allowed"); 3190 NEED1("limit needs mask and # of connections"); 3191 have_state = cmd; 3192 { 3193 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3194 3195 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3196 cmd->opcode = O_LIMIT; 3197 c->limit_mask = 0; 3198 c->conn_limit = 0; 3199 for (; ac >1 ;) { 3200 int val; 3201 3202 val = match_token(limit_masks, *av); 3203 if (val <= 0) 3204 break; 3205 c->limit_mask |= val; 3206 ac--; av++; 3207 } 3208 c->conn_limit = atoi(*av); 3209 if (c->conn_limit == 0) 3210 errx(EX_USAGE, "limit: limit must be >0"); 3211 if (c->limit_mask == 0) 3212 errx(EX_USAGE, "missing limit mask"); 3213 ac--; av++; 3214 } 3215 break; 3216 3217 case TOK_PROTO: 3218 NEED1("missing protocol"); 3219 if (add_proto(cmd, *av)) { 3220 proto = cmd->arg1; 3221 ac--; av++; 3222 } else 3223 errx(EX_DATAERR, "invalid protocol ``%s''", 3224 *av); 3225 break; 3226 3227 case TOK_SRCIP: 3228 NEED1("missing source IP"); 3229 if (add_srcip(cmd, *av)) { 3230 ac--; av++; 3231 } 3232 break; 3233 3234 case TOK_DSTIP: 3235 NEED1("missing destination IP"); 3236 if (add_dstip(cmd, *av)) { 3237 ac--; av++; 3238 } 3239 break; 3240 3241 case TOK_SRCPORT: 3242 NEED1("missing source port"); 3243 if (!strncmp(*av, "any", strlen(*av)) || 3244 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3245 ac--; av++; 3246 } else 3247 errx(EX_DATAERR, "invalid source port %s", *av); 3248 break; 3249 3250 case TOK_DSTPORT: 3251 NEED1("missing destination port"); 3252 if (!strncmp(*av, "any", strlen(*av)) || 3253 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3254 ac--; av++; 3255 } else 3256 errx(EX_DATAERR, "invalid destination port %s", 3257 *av); 3258 break; 3259 3260 case TOK_MAC: 3261 if (ac < 2) 3262 errx(EX_USAGE, "MAC dst-mac src-mac"); 3263 if (add_mac(cmd, ac, av)) { 3264 ac -= 2; av += 2; 3265 } 3266 break; 3267 3268 case TOK_MACTYPE: 3269 NEED1("missing mac type"); 3270 if (!add_mactype(cmd, ac, *av)) 3271 errx(EX_DATAERR, "invalid mac type %s", *av); 3272 ac--; av++; 3273 break; 3274 3275 case TOK_VERREVPATH: 3276 fill_cmd(cmd, O_VERREVPATH, 0, 0); 3277 break; 3278 3279 case TOK_IPSEC: 3280 fill_cmd(cmd, O_IPSEC, 0, 0); 3281 break; 3282 3283 default: 3284 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3285 } 3286 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3287 prev = cmd; 3288 cmd = next_cmd(cmd); 3289 } 3290 } 3291 3292 done: 3293 /* 3294 * Now copy stuff into the rule. 3295 * If we have a keep-state option, the first instruction 3296 * must be a PROBE_STATE (which is generated here). 3297 * If we have a LOG option, it was stored as the first command, 3298 * and now must be moved to the top of the action part. 3299 */ 3300 dst = (ipfw_insn *)rule->cmd; 3301 3302 /* 3303 * First thing to write into the command stream is the match probability. 3304 */ 3305 if (match_prob != 1) { /* 1 means always match */ 3306 dst->opcode = O_PROB; 3307 dst->len = 2; 3308 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3309 dst += dst->len; 3310 } 3311 3312 /* 3313 * generate O_PROBE_STATE if necessary 3314 */ 3315 if (have_state && have_state->opcode != O_CHECK_STATE) { 3316 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3317 dst = next_cmd(dst); 3318 } 3319 /* 3320 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3321 */ 3322 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3323 i = F_LEN(src); 3324 3325 switch (src->opcode) { 3326 case O_LOG: 3327 case O_KEEP_STATE: 3328 case O_LIMIT: 3329 break; 3330 default: 3331 bcopy(src, dst, i * sizeof(u_int32_t)); 3332 dst += i; 3333 } 3334 } 3335 3336 /* 3337 * put back the have_state command as last opcode 3338 */ 3339 if (have_state && have_state->opcode != O_CHECK_STATE) { 3340 i = F_LEN(have_state); 3341 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3342 dst += i; 3343 } 3344 /* 3345 * start action section 3346 */ 3347 rule->act_ofs = dst - rule->cmd; 3348 3349 /* 3350 * put back O_LOG if necessary 3351 */ 3352 src = (ipfw_insn *)cmdbuf; 3353 if ( src->opcode == O_LOG ) { 3354 i = F_LEN(src); 3355 bcopy(src, dst, i * sizeof(u_int32_t)); 3356 dst += i; 3357 } 3358 /* 3359 * copy all other actions 3360 */ 3361 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3362 i = F_LEN(src); 3363 bcopy(src, dst, i * sizeof(u_int32_t)); 3364 dst += i; 3365 } 3366 3367 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3368 i = (void *)dst - (void *)rule; 3369 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3370 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3371 if (!do_quiet) 3372 show_ipfw(rule, 10, 10); 3373 } 3374 3375 static void 3376 zero(int ac, char *av[]) 3377 { 3378 int rulenum; 3379 int failed = EX_OK; 3380 3381 av++; ac--; 3382 3383 if (!ac) { 3384 /* clear all entries */ 3385 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3386 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3387 if (!do_quiet) 3388 printf("Accounting cleared.\n"); 3389 3390 return; 3391 } 3392 3393 while (ac) { 3394 /* Rule number */ 3395 if (isdigit(**av)) { 3396 rulenum = atoi(*av); 3397 av++; 3398 ac--; 3399 if (setsockopt(s, IPPROTO_IP, 3400 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3401 warn("rule %u: setsockopt(IP_FW_ZERO)", 3402 rulenum); 3403 failed = EX_UNAVAILABLE; 3404 } else if (!do_quiet) 3405 printf("Entry %d cleared\n", rulenum); 3406 } else { 3407 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3408 } 3409 } 3410 if (failed != EX_OK) 3411 exit(failed); 3412 } 3413 3414 static void 3415 resetlog(int ac, char *av[]) 3416 { 3417 int rulenum; 3418 int failed = EX_OK; 3419 3420 av++; ac--; 3421 3422 if (!ac) { 3423 /* clear all entries */ 3424 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3425 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3426 if (!do_quiet) 3427 printf("Logging counts reset.\n"); 3428 3429 return; 3430 } 3431 3432 while (ac) { 3433 /* Rule number */ 3434 if (isdigit(**av)) { 3435 rulenum = atoi(*av); 3436 av++; 3437 ac--; 3438 if (setsockopt(s, IPPROTO_IP, 3439 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3440 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3441 rulenum); 3442 failed = EX_UNAVAILABLE; 3443 } else if (!do_quiet) 3444 printf("Entry %d logging count reset\n", 3445 rulenum); 3446 } else { 3447 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3448 } 3449 } 3450 if (failed != EX_OK) 3451 exit(failed); 3452 } 3453 3454 static void 3455 flush() 3456 { 3457 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3458 3459 if (!do_force && !do_quiet) { /* need to ask user */ 3460 int c; 3461 3462 printf("Are you sure? [yn] "); 3463 fflush(stdout); 3464 do { 3465 c = toupper(getc(stdin)); 3466 while (c != '\n' && getc(stdin) != '\n') 3467 if (feof(stdin)) 3468 return; /* and do not flush */ 3469 } while (c != 'Y' && c != 'N'); 3470 printf("\n"); 3471 if (c == 'N') /* user said no */ 3472 return; 3473 } 3474 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3475 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3476 do_pipe ? "DUMMYNET" : "FW"); 3477 if (!do_quiet) 3478 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3479 } 3480 3481 static int 3482 ipfw_main(int ac, char **av) 3483 { 3484 int ch; 3485 3486 if (ac == 1) 3487 show_usage(); 3488 3489 /* Set the force flag for non-interactive processes */ 3490 do_force = !isatty(STDIN_FILENO); 3491 3492 optind = optreset = 1; 3493 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3494 switch (ch) { 3495 case 'h': /* help */ 3496 help(); 3497 break; /* NOTREACHED */ 3498 3499 case 's': /* sort */ 3500 do_sort = atoi(optarg); 3501 break; 3502 case 'a': 3503 do_acct = 1; 3504 break; 3505 case 'c': 3506 do_compact = 1; 3507 break; 3508 case 'd': 3509 do_dynamic = 1; 3510 break; 3511 case 'e': 3512 do_expired = 1; 3513 break; 3514 case 'f': 3515 do_force = 1; 3516 break; 3517 case 'N': 3518 do_resolv = 1; 3519 break; 3520 case 'q': 3521 do_quiet = 1; 3522 break; 3523 case 'S': 3524 show_sets = 1; 3525 break; 3526 case 't': 3527 do_time = 1; 3528 break; 3529 case 'v': /* verbose */ 3530 verbose++; 3531 break; 3532 default: 3533 show_usage(); 3534 } 3535 3536 ac -= optind; 3537 av += optind; 3538 NEED1("bad arguments, for usage summary ``ipfw''"); 3539 3540 /* 3541 * optional: pipe or queue 3542 */ 3543 if (!strncmp(*av, "pipe", strlen(*av))) { 3544 do_pipe = 1; 3545 ac--; 3546 av++; 3547 } else if (!strncmp(*av, "queue", strlen(*av))) { 3548 do_pipe = 2; 3549 ac--; 3550 av++; 3551 } 3552 NEED1("missing command"); 3553 3554 /* 3555 * for pipes and queues we normally say 'pipe NN config' 3556 * but the code is easier to parse as 'pipe config NN' 3557 * so we swap the two arguments. 3558 */ 3559 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3560 char *p = av[0]; 3561 av[0] = av[1]; 3562 av[1] = p; 3563 } 3564 if (!strncmp(*av, "add", strlen(*av))) 3565 add(ac, av); 3566 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3567 config_pipe(ac, av); 3568 else if (!strncmp(*av, "delete", strlen(*av))) 3569 delete(ac, av); 3570 else if (!strncmp(*av, "flush", strlen(*av))) 3571 flush(); 3572 else if (!strncmp(*av, "zero", strlen(*av))) 3573 zero(ac, av); 3574 else if (!strncmp(*av, "resetlog", strlen(*av))) 3575 resetlog(ac, av); 3576 else if (!strncmp(*av, "print", strlen(*av)) || 3577 !strncmp(*av, "list", strlen(*av))) 3578 list(ac, av); 3579 else if (!strncmp(*av, "set", strlen(*av))) 3580 sets_handler(ac, av); 3581 else if (!strncmp(*av, "enable", strlen(*av))) 3582 sysctl_handler(ac, av, 1); 3583 else if (!strncmp(*av, "disable", strlen(*av))) 3584 sysctl_handler(ac, av, 0); 3585 else if (!strncmp(*av, "show", strlen(*av))) { 3586 do_acct++; 3587 list(ac, av); 3588 } else 3589 errx(EX_USAGE, "bad command `%s'", *av); 3590 return 0; 3591 } 3592 3593 3594 static void 3595 ipfw_readfile(int ac, char *av[]) 3596 { 3597 #define MAX_ARGS 32 3598 #define WHITESP " \t\f\v\n\r" 3599 char buf[BUFSIZ]; 3600 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3601 char linename[10]; 3602 int i=0, lineno=0, qflag=0, pflag=0, status; 3603 FILE *f = NULL; 3604 pid_t preproc = 0; 3605 int c; 3606 3607 while ((c = getopt(ac, av, "p:q")) != -1) { 3608 switch(c) { 3609 case 'p': 3610 pflag = 1; 3611 cmd = optarg; 3612 args[0] = cmd; 3613 i = 1; 3614 break; 3615 3616 case 'q': 3617 qflag = 1; 3618 break; 3619 3620 default: 3621 errx(EX_USAGE, "bad arguments, for usage" 3622 " summary ``ipfw''"); 3623 } 3624 3625 if (pflag) 3626 break; 3627 } 3628 3629 if (pflag) { 3630 /* Pass all but the last argument to the preprocessor. */ 3631 while (optind < ac - 1) { 3632 if (i >= MAX_ARGS) 3633 errx(EX_USAGE, "too many preprocessor options"); 3634 args[i++] = av[optind++]; 3635 } 3636 } 3637 3638 av += optind; 3639 ac -= optind; 3640 if (ac != 1) 3641 errx(EX_USAGE, "extraneous filename arguments"); 3642 3643 if ((f = fopen(av[0], "r")) == NULL) 3644 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3645 3646 if (pflag) { 3647 /* pipe through preprocessor (cpp or m4) */ 3648 int pipedes[2]; 3649 3650 args[i] = 0; 3651 3652 if (pipe(pipedes) == -1) 3653 err(EX_OSERR, "cannot create pipe"); 3654 3655 switch((preproc = fork())) { 3656 case -1: 3657 err(EX_OSERR, "cannot fork"); 3658 3659 case 0: 3660 /* child */ 3661 if (dup2(fileno(f), 0) == -1 3662 || dup2(pipedes[1], 1) == -1) 3663 err(EX_OSERR, "dup2()"); 3664 fclose(f); 3665 close(pipedes[1]); 3666 close(pipedes[0]); 3667 execvp(cmd, args); 3668 err(EX_OSERR, "execvp(%s) failed", cmd); 3669 3670 default: 3671 /* parent */ 3672 fclose(f); 3673 close(pipedes[1]); 3674 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3675 int savederrno = errno; 3676 3677 (void)kill(preproc, SIGTERM); 3678 errno = savederrno; 3679 err(EX_OSERR, "fdopen()"); 3680 } 3681 } 3682 } 3683 3684 while (fgets(buf, BUFSIZ, f)) { 3685 lineno++; 3686 sprintf(linename, "Line %d", lineno); 3687 args[0] = linename; 3688 3689 if (*buf == '#') 3690 continue; 3691 if ((p = strchr(buf, '#')) != NULL) 3692 *p = '\0'; 3693 i = 1; 3694 if (qflag) 3695 args[i++] = "-q"; 3696 for (a = strtok(buf, WHITESP); 3697 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3698 args[i] = a; 3699 if (i == (qflag? 2: 1)) 3700 continue; 3701 if (i == MAX_ARGS) 3702 errx(EX_USAGE, "%s: too many arguments", 3703 linename); 3704 args[i] = NULL; 3705 3706 ipfw_main(i, args); 3707 } 3708 fclose(f); 3709 if (pflag) { 3710 if (waitpid(preproc, &status, 0) == -1) 3711 errx(EX_OSERR, "waitpid()"); 3712 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3713 errx(EX_UNAVAILABLE, 3714 "preprocessor exited with status %d", 3715 WEXITSTATUS(status)); 3716 else if (WIFSIGNALED(status)) 3717 errx(EX_UNAVAILABLE, 3718 "preprocessor exited with signal %d", 3719 WTERMSIG(status)); 3720 } 3721 } 3722 3723 int 3724 main(int ac, char *av[]) 3725 { 3726 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3727 if (s < 0) 3728 err(EX_UNAVAILABLE, "socket"); 3729 3730 /* 3731 * If the last argument is an absolute pathname, interpret it 3732 * as a file to be preprocessed. 3733 */ 3734 3735 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3736 ipfw_readfile(ac, av); 3737 else 3738 ipfw_main(ac, av); 3739 return EX_OK; 3740 } 3741