1 /* 2 * Copyright (c) 2002 Luigi Rizzo 3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4 * Copyright (c) 1994 Ugen J.S.Antsilevich 5 * 6 * Idea and grammar partially left from: 7 * Copyright (c) 1993 Daniel Boulet 8 * 9 * Redistribution and use in source forms, with and without modification, 10 * are permitted provided that this entire comment appears intact. 11 * 12 * Redistribution in binary form may occur without any restrictions. 13 * Obviously, it would be nice if you gave credit where credit is due 14 * but requiring it would be too onerous. 15 * 16 * This software is provided ``AS IS'' without any warranties of any kind. 17 * 18 * NEW command line interface for IP firewall facility 19 * 20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $ 21 */ 22 23 #include <sys/param.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/sockio.h> 27 #include <sys/sysctl.h> 28 #include <sys/time.h> 29 #include <sys/wait.h> 30 31 #include <ctype.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <grp.h> 35 #include <limits.h> 36 #include <netdb.h> 37 #include <pwd.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <stdarg.h> 42 #include <string.h> 43 #include <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 <net/ipfw/ip_fw.h> 53 #include <net/route.h> /* def. of struct route */ 54 #include <net/ethernet.h> 55 #include <net/dummynet/ip_dummynet.h> 56 #include <netinet/tcp.h> 57 #include <arpa/inet.h> 58 59 int s, /* main RAW socket */ 60 do_resolv, /* Would try to resolve all */ 61 do_acct, /* Show packet/byte count */ 62 do_time, /* Show time stamps */ 63 do_quiet, /* Be quiet in add and flush */ 64 do_force, /* Don't ask for confirmation */ 65 do_pipe, /* this cmd refers to a pipe */ 66 do_table, /* this cmd referes to a table */ 67 do_sort, /* field to sort results (0 = no) */ 68 do_dynamic, /* display dynamic rules */ 69 do_expired, /* display expired dynamic rules */ 70 do_compact, /* show rules in compact mode */ 71 show_sets, /* display rule sets */ 72 verbose; 73 74 #define IP_MASK_ALL 0xffffffff 75 76 /* 77 * structure to hold flag names and associated values to be 78 * set in the appropriate masks. 79 * A NULL string terminates the array. 80 * Often, an element with 0 value contains an error string. 81 * 82 */ 83 struct _s_x { 84 const char *s; 85 uint32_t x; 86 }; 87 88 static struct _s_x f_tcpflags[] = { 89 { "syn", TH_SYN }, 90 { "fin", TH_FIN }, 91 { "ack", TH_ACK }, 92 { "psh", TH_PUSH }, 93 { "rst", TH_RST }, 94 { "urg", TH_URG }, 95 { "tcp flag", 0 }, 96 { NULL, 0 } 97 }; 98 99 static struct _s_x f_tcpopts[] = { 100 { "mss", IP_FW_TCPOPT_MSS }, 101 { "maxseg", IP_FW_TCPOPT_MSS }, 102 { "window", IP_FW_TCPOPT_WINDOW }, 103 { "sack", IP_FW_TCPOPT_SACK }, 104 { "ts", IP_FW_TCPOPT_TS }, 105 { "timestamp", IP_FW_TCPOPT_TS }, 106 { "cc", IP_FW_TCPOPT_CC }, 107 { "tcp option", 0 }, 108 { NULL, 0 } 109 }; 110 111 /* 112 * IP options span the range 0 to 255 so we need to remap them 113 * (though in fact only the low 5 bits are significant). 114 */ 115 static struct _s_x f_ipopts[] = { 116 { "ssrr", IP_FW_IPOPT_SSRR}, 117 { "lsrr", IP_FW_IPOPT_LSRR}, 118 { "rr", IP_FW_IPOPT_RR}, 119 { "ts", IP_FW_IPOPT_TS}, 120 { "ip option", 0 }, 121 { NULL, 0 } 122 }; 123 124 static struct _s_x f_iptos[] = { 125 { "lowdelay", IPTOS_LOWDELAY}, 126 { "throughput", IPTOS_THROUGHPUT}, 127 { "reliability", IPTOS_RELIABILITY}, 128 { "mincost", IPTOS_MINCOST}, 129 { "congestion", IPTOS_CE}, 130 { "ecntransport", IPTOS_ECT}, 131 { "ip tos option", 0}, 132 { NULL, 0 } 133 }; 134 135 static struct _s_x limit_masks[] = { 136 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 137 {"src-addr", DYN_SRC_ADDR}, 138 {"src-port", DYN_SRC_PORT}, 139 {"dst-addr", DYN_DST_ADDR}, 140 {"dst-port", DYN_DST_PORT}, 141 {NULL, 0} 142 }; 143 144 /* 145 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 146 * This is only used in this code. 147 */ 148 #define IPPROTO_ETHERTYPE 0x1000 149 static struct _s_x ether_types[] = { 150 /* 151 * Note, we cannot use "-:&/" in the names because they are field 152 * separators in the type specifications. Also, we use s = NULL as 153 * end-delimiter, because a type of 0 can be legal. 154 */ 155 { "ip", 0x0800 }, 156 { "ipv4", 0x0800 }, 157 { "ipv6", 0x86dd }, 158 { "arp", 0x0806 }, 159 { "rarp", 0x8035 }, 160 { "vlan", 0x8100 }, 161 { "loop", 0x9000 }, 162 { "trail", 0x1000 }, 163 { "pppoe_disc", 0x8863 }, 164 { "pppoe_sess", 0x8864 }, 165 { "ipx_8022", 0x00E0 }, 166 { "ipx_8023", 0x0000 }, 167 { "ipx_ii", 0x8137 }, 168 { "ipx_snap", 0x8137 }, 169 { "ipx", 0x8137 }, 170 { "ns", 0x0600 }, 171 { NULL, 0 } 172 }; 173 174 static void show_usage(void); 175 176 enum tokens { 177 TOK_NULL=0, 178 179 TOK_OR, 180 TOK_NOT, 181 TOK_STARTBRACE, 182 TOK_ENDBRACE, 183 184 TOK_ACCEPT, 185 TOK_COUNT, 186 TOK_DEFRAG, 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_REDIRECT, 205 TOK_LAYER2, 206 TOK_OUT, 207 TOK_XMIT, 208 TOK_RECV, 209 TOK_VIA, 210 TOK_FRAG, 211 TOK_IPFRAG, 212 TOK_IPOPTS, 213 TOK_IPLEN, 214 TOK_IPID, 215 TOK_IPPRECEDENCE, 216 TOK_IPTOS, 217 TOK_IPTTL, 218 TOK_IPVER, 219 TOK_ESTAB, 220 TOK_SETUP, 221 TOK_TCPFLAGS, 222 TOK_TCPOPTS, 223 TOK_TCPSEQ, 224 TOK_TCPACK, 225 TOK_TCPWIN, 226 TOK_ICMPTYPES, 227 TOK_MAC, 228 TOK_MACTYPE, 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 { "defrag", TOK_DEFRAG }, 292 { NULL, TOK_NULL }, 293 { NULL, 0 } 294 }; 295 296 struct _s_x rule_options[] = { 297 { "uid", TOK_UID }, 298 { "gid", TOK_GID }, 299 { "in", TOK_IN }, 300 { "limit", TOK_LIMIT }, 301 { "keep-state", TOK_KEEPSTATE }, 302 { "redirect", TOK_REDIRECT }, 303 { "rdr", TOK_REDIRECT }, 304 { "layer2", TOK_LAYER2 }, 305 { "out", TOK_OUT }, 306 { "xmit", TOK_XMIT }, 307 { "recv", TOK_RECV }, 308 { "via", TOK_VIA }, 309 { "fragment", TOK_FRAG }, 310 { "frag", TOK_FRAG }, 311 { "ipfrag", TOK_IPFRAG }, 312 { "ipoptions", TOK_IPOPTS }, 313 { "ipopts", TOK_IPOPTS }, 314 { "iplen", TOK_IPLEN }, 315 { "ipid", TOK_IPID }, 316 { "ipprecedence", TOK_IPPRECEDENCE }, 317 { "iptos", TOK_IPTOS }, 318 { "ipttl", TOK_IPTTL }, 319 { "ipversion", TOK_IPVER }, 320 { "ipver", TOK_IPVER }, 321 { "estab", TOK_ESTAB }, 322 { "established", TOK_ESTAB }, 323 { "setup", TOK_SETUP }, 324 { "tcpflags", TOK_TCPFLAGS }, 325 { "tcpflgs", TOK_TCPFLAGS }, 326 { "tcpoptions", TOK_TCPOPTS }, 327 { "tcpopts", TOK_TCPOPTS }, 328 { "tcpseq", TOK_TCPSEQ }, 329 { "tcpack", TOK_TCPACK }, 330 { "tcpwin", TOK_TCPWIN }, 331 { "icmptype", TOK_ICMPTYPES }, 332 { "icmptypes", TOK_ICMPTYPES }, 333 { "dst-ip", TOK_DSTIP }, 334 { "src-ip", TOK_SRCIP }, 335 { "dst-port", TOK_DSTPORT }, 336 { "src-port", TOK_SRCPORT }, 337 { "proto", TOK_PROTO }, 338 { "MAC", TOK_MAC }, 339 { "mac", TOK_MAC }, 340 { "mac-type", TOK_MACTYPE }, 341 342 { "not", TOK_NOT }, /* pseudo option */ 343 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 344 { "or", TOK_OR }, /* pseudo option */ 345 { "|", /* escape */ TOK_OR }, /* pseudo option */ 346 { "{", TOK_STARTBRACE }, /* pseudo option */ 347 { "(", TOK_STARTBRACE }, /* pseudo option */ 348 { "}", TOK_ENDBRACE }, /* pseudo option */ 349 { ")", TOK_ENDBRACE }, /* pseudo option */ 350 { NULL, TOK_NULL }, 351 { NULL, 0 } 352 }; 353 354 /** 355 * match_token takes a table and a string, returns the value associated 356 * with the string (0 meaning an error in most cases) 357 */ 358 static int 359 match_token(struct _s_x *table, char *string) 360 { 361 struct _s_x *pt; 362 int i = strlen(string); 363 364 for (pt = table ; i && pt->s != NULL ; pt++) 365 if ((int)strlen(pt->s) == i && !bcmp(string, pt->s, i)) 366 return pt->x; 367 return -1; 368 }; 369 370 static const char * 371 match_value(struct _s_x *p, u_int32_t value) 372 { 373 for (; p->s != NULL; p++) 374 if (p->x == value) 375 return p->s; 376 return NULL; 377 } 378 379 /* 380 * prints one port, symbolic or numeric 381 */ 382 static void 383 print_port(int proto, u_int16_t port) 384 { 385 386 if (proto == IPPROTO_ETHERTYPE) { 387 const char *str; 388 389 if (do_resolv && (str = match_value(ether_types, port)) ) 390 printf("%s", str); 391 else 392 printf("0x%04x", port); 393 } else { 394 struct servent *se = NULL; 395 if (do_resolv) { 396 struct protoent *pe = getprotobynumber(proto); 397 398 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 399 } 400 if (se) 401 printf("%s", se->s_name); 402 else 403 printf("%d", port); 404 } 405 } 406 407 /* 408 * print the values in a list of ports 409 * XXX todo: add support for mask. 410 */ 411 static void 412 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 413 { 414 u_int16_t *p = cmd->ports; 415 int i; 416 const char *sep= " "; 417 418 if (cmd->o.len & F_NOT) 419 printf(" not"); 420 if (opcode != 0) 421 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 422 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 423 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 424 printf("%s", sep); 425 print_port(proto, p[0]); 426 if (p[0] != p[1]) { 427 printf("-"); 428 print_port(proto, p[1]); 429 } 430 sep = ","; 431 } 432 } 433 434 /* 435 * Like strtol, but also translates service names into port numbers 436 * for some protocols. 437 * In particular: 438 * proto == -1 disables the protocol check; 439 * proto == IPPROTO_ETHERTYPE looks up an internal table 440 * proto == <some value in /etc/protocols> matches the values there. 441 * Returns *end == s in case the parameter is not found. 442 */ 443 static int 444 strtoport(char *str, char **end, int base, int proto) 445 { 446 char *p, *buf; 447 char *s1; 448 int i; 449 450 *end = str; /* default - not found */ 451 if (*str == '\0') 452 return 0; /* not found */ 453 454 if (isdigit(*str)) 455 return strtol(str, end, base); 456 457 /* 458 * find separator. '\\' escapes the next char. 459 */ 460 for (s1 = str; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 461 if (*s1 == '\\' && s1[1] != '\0') 462 s1++; 463 464 buf = malloc(s1 - str + 1); 465 if (buf == NULL) 466 return 0; 467 468 /* 469 * copy into a buffer skipping backslashes 470 */ 471 for (p = str, i = 0; p != s1 ; p++) 472 if ( *p != '\\') 473 buf[i++] = *p; 474 buf[i++] = '\0'; 475 476 if (proto == IPPROTO_ETHERTYPE) { 477 i = match_token(ether_types, buf); 478 free(buf); 479 if (i != -1) { /* found */ 480 *end = s1; 481 return i; 482 } 483 } else { 484 struct protoent *pe = NULL; 485 struct servent *se; 486 487 if (proto != 0) 488 pe = getprotobynumber(proto); 489 setservent(1); 490 se = getservbyname(buf, pe ? pe->p_name : NULL); 491 free(buf); 492 if (se != NULL) { 493 *end = s1; 494 return ntohs(se->s_port); 495 } 496 } 497 return 0; /* not found */ 498 } 499 500 /* 501 * fill the body of the command with the list of port ranges. 502 * At the moment it only understands numeric ranges. 503 */ 504 static int 505 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 506 { 507 u_int16_t *p = cmd->ports; 508 int i = 0; 509 char *str = av; 510 511 while (*str) { 512 u_int16_t a, b; 513 514 a = strtoport(av, &str, 0, proto); 515 if (str == av) /* no parameter */ 516 break; 517 if (*str == '-') { /* a range */ 518 av = str+1; 519 b = strtoport(av, &str, 0, proto); 520 if (str == av) /* no parameter */ 521 break; 522 p[0] = a; 523 p[1] = b; 524 } else if (*str == ',' || *str == '\0' ) { 525 p[0] = p[1] = a; 526 } else { /* invalid separator */ 527 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 528 *str, av); 529 } 530 i++; 531 p += 2; 532 av = str+1; 533 } 534 if (i > 0) { 535 if (i+1 > F_LEN_MASK) 536 errx(EX_DATAERR, "too many ports/ranges\n"); 537 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 538 } 539 return i; 540 } 541 542 static struct _s_x icmpcodes[] = { 543 { "net", ICMP_UNREACH_NET }, 544 { "host", ICMP_UNREACH_HOST }, 545 { "protocol", ICMP_UNREACH_PROTOCOL }, 546 { "port", ICMP_UNREACH_PORT }, 547 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 548 { "srcfail", ICMP_UNREACH_SRCFAIL }, 549 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 550 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 551 { "isolated", ICMP_UNREACH_ISOLATED }, 552 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 553 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 554 { "tosnet", ICMP_UNREACH_TOSNET }, 555 { "toshost", ICMP_UNREACH_TOSHOST }, 556 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 557 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 558 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 559 { NULL, 0 } 560 }; 561 562 static void 563 fill_reject_code(u_short *codep, char *str) 564 { 565 int val; 566 char *s1; 567 568 val = strtoul(str, &s1, 0); 569 if (s1 == str || *s1 != '\0' || val >= 0x100) 570 val = match_token(icmpcodes, str); 571 if (val < 0) 572 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 573 *codep = val; 574 return; 575 } 576 577 static void 578 print_reject_code(u_int16_t code) 579 { 580 const char *str = match_value(icmpcodes, code); 581 582 if (str != NULL) 583 printf("unreach %s", str); 584 else 585 printf("unreach %u", code); 586 } 587 588 /* 589 * Returns the number of bits set (from left) in a contiguous bitmask, 590 * or -1 if the mask is not contiguous. 591 * XXX this needs a proper fix. 592 * This effectively works on masks in big-endian (network) format. 593 * when compiled on little endian architectures. 594 * 595 * First bit is bit 7 of the first byte -- note, for MAC addresses, 596 * the first bit on the wire is bit 0 of the first byte. 597 * len is the max length in bits. 598 */ 599 static int 600 contigmask(u_char *p, int len) 601 { 602 int i, n; 603 for (i=0; i<len ; i++) 604 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 605 break; 606 for (n=i+1; n < len; n++) 607 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 608 return -1; /* mask not contiguous */ 609 return i; 610 } 611 612 /* 613 * print flags set/clear in the two bitmasks passed as parameters. 614 * There is a specialized check for f_tcpflags. 615 */ 616 static void 617 print_flags(const char *name, ipfw_insn *cmd, struct _s_x *list) 618 { 619 const char *comma=""; 620 int i; 621 u_char set = cmd->arg1 & 0xff; 622 u_char clear = (cmd->arg1 >> 8) & 0xff; 623 624 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 625 printf(" setup"); 626 return; 627 } 628 629 printf(" %s ", name); 630 for (i=0; list[i].x != 0; i++) { 631 if (set & list[i].x) { 632 set &= ~list[i].x; 633 printf("%s%s", comma, list[i].s); 634 comma = ","; 635 } 636 if (clear & list[i].x) { 637 clear &= ~list[i].x; 638 printf("%s!%s", comma, list[i].s); 639 comma = ","; 640 } 641 } 642 } 643 644 /* 645 * Print the ip address contained in a command. 646 */ 647 static void 648 print_ip(ipfw_insn_ip *cmd, const char *str) 649 { 650 struct hostent *he = NULL; 651 int mb; 652 653 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", str); 654 655 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 656 printf("me"); 657 return; 658 } 659 if (cmd->o.opcode == O_IP_SRC_TABLE || 660 cmd->o.opcode == O_IP_DST_TABLE) { 661 printf("<%u>", cmd->o.arg1); 662 return; 663 } 664 if (cmd->o.opcode == O_IP_SRC_IFIP || 665 cmd->o.opcode == O_IP_DST_IFIP) { 666 printf("[%s%s]", ((ipfw_insn_ifip *)cmd)->ifname, 667 (cmd->o.arg1 & IPFW_IFIP_NET) ? ":net" : ""); 668 return; 669 } 670 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 671 u_int32_t x, *d; 672 int i; 673 char comma = '{'; 674 675 x = cmd->o.arg1 - 1; 676 x = htonl( ~x ); 677 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 678 printf("%s/%d", inet_ntoa(cmd->addr), 679 contigmask((u_char *)&x, 32)); 680 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 681 x &= 0xff; /* base */ 682 d = (u_int32_t *)&(cmd->mask); 683 for (i=0; i < cmd->o.arg1; i++) 684 if (d[ i/32] & (1<<(i & 31))) { 685 printf("%c%d", comma, i+x); 686 comma = ','; 687 } 688 printf("}"); 689 return; 690 } 691 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 692 mb = 32; 693 else 694 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 695 if (mb == 32 && do_resolv) 696 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long), 697 AF_INET); 698 if (he != NULL) /* resolved to name */ 699 printf("%s", he->h_name); 700 else if (mb == 0) /* any */ 701 printf("any"); 702 else { /* numeric IP followed by some kind of mask */ 703 printf("%s", inet_ntoa(cmd->addr)); 704 if (mb < 0) 705 printf(":%s", inet_ntoa(cmd->mask)); 706 else if (mb < 32) 707 printf("/%d", mb); 708 } 709 } 710 711 /* 712 * prints a MAC address/mask pair 713 */ 714 static void 715 print_mac(u_char *addr, u_char *mask) 716 { 717 int l = contigmask(mask, 48); 718 719 if (l == 0) 720 printf(" any"); 721 else { 722 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 723 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 724 if (l == -1) 725 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 726 mask[0], mask[1], mask[2], 727 mask[3], mask[4], mask[5]); 728 else if (l < 48) 729 printf("/%d", l); 730 } 731 } 732 733 static void 734 fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 735 { 736 u_int8_t type; 737 738 cmd->d[0] = 0; 739 while (*av) { 740 if (*av == ',') 741 av++; 742 743 type = strtoul(av, &av, 0); 744 745 if (*av != ',' && *av != '\0') 746 errx(EX_DATAERR, "invalid ICMP type"); 747 748 if (type > 31) 749 errx(EX_DATAERR, "ICMP type out of range"); 750 751 cmd->d[0] |= 1 << type; 752 } 753 cmd->o.opcode = O_ICMPTYPE; 754 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 755 } 756 757 static void 758 print_icmptypes(ipfw_insn_u32 *cmd) 759 { 760 int i; 761 char sep= ' '; 762 763 printf(" icmptypes"); 764 for (i = 0; i < 32; i++) { 765 if ( (cmd->d[0] & (1 << (i))) == 0) 766 continue; 767 printf("%c%d", sep, i); 768 sep = ','; 769 } 770 } 771 772 /* 773 * show_ipfw() prints the body of an ipfw rule. 774 * Because the standard rule has at least proto src_ip dst_ip, we use 775 * a helper function to produce these entries if not provided explicitly. 776 * The first argument is the list of fields we have, the second is 777 * the list of fields we want to be printed. 778 * 779 * Special cases if we have provided a MAC header: 780 * + if the rule does not contain IP addresses/ports, do not print them; 781 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 782 * 783 * Once we have 'have_options', IP header fields are printed as options. 784 */ 785 #define HAVE_PROTO 0x0001 786 #define HAVE_SRCIP 0x0002 787 #define HAVE_DSTIP 0x0004 788 #define HAVE_MAC 0x0008 789 #define HAVE_MACTYPE 0x0010 790 #define HAVE_OPTIONS 0x8000 791 792 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 793 static void 794 show_prerequisites(int *flags, int want, int cmd) 795 { 796 if ( (*flags & HAVE_IP) == HAVE_IP) 797 *flags |= HAVE_OPTIONS; 798 799 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 800 cmd != O_MAC_TYPE) { 801 /* 802 * mac-type was optimized out by the compiler, 803 * restore it 804 */ 805 printf(" any"); 806 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 807 return; 808 } 809 if ( !(*flags & HAVE_OPTIONS)) { 810 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 811 printf(" ip"); 812 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 813 printf(" from any"); 814 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 815 printf(" to any"); 816 } 817 *flags |= want; 818 } 819 820 static void 821 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth) 822 { 823 static int twidth = 0; 824 int l; 825 ipfw_insn *cmd; 826 int proto = 0; /* default */ 827 int flags = 0; /* prerequisites */ 828 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 829 int or_block = 0; /* we are in an or block */ 830 831 u_int32_t set_disable = rule->set_disable; 832 833 if (set_disable & (1 << rule->set)) { /* disabled */ 834 if (!show_sets) 835 return; 836 else 837 printf("# DISABLED "); 838 } 839 printf("%05u ", rule->rulenum); 840 841 if (do_acct) 842 printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth, 843 (uintmax_t)rule->bcnt); 844 845 if (do_time) { 846 char timestr[30]; 847 848 if (twidth == 0) { 849 time_t t0 = 0; 850 851 strcpy(timestr, ctime((time_t *)&t0)); 852 *strchr(timestr, '\n') = '\0'; 853 twidth = strlen(timestr); 854 } 855 if (rule->timestamp) { 856 time_t t = _long_to_time(rule->timestamp); 857 858 strcpy(timestr, ctime(&t)); 859 *strchr(timestr, '\n') = '\0'; 860 printf("%s ", timestr); 861 } else { 862 printf("%*s ", twidth, " "); 863 } 864 } 865 866 if (show_sets) 867 printf("set %d ", rule->set); 868 869 /* 870 * print the optional "match probability" 871 */ 872 if (rule->cmd_len > 0) { 873 cmd = rule->cmd ; 874 if (cmd->opcode == O_PROB) { 875 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 876 double d = 1.0 * p->d[0]; 877 878 d = (d / 0x7fffffff); 879 printf("prob %f ", d); 880 } 881 } 882 883 /* 884 * first print actions 885 */ 886 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 887 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 888 switch(cmd->opcode) { 889 case O_CHECK_STATE: 890 printf("check-state"); 891 flags = HAVE_IP; /* avoid printing anything else */ 892 break; 893 894 case O_ACCEPT: 895 printf("allow"); 896 break; 897 898 case O_COUNT: 899 printf("count"); 900 break; 901 902 case O_DEFRAG: 903 printf("defrag"); 904 break; 905 906 case O_DENY: 907 printf("deny"); 908 break; 909 910 case O_REJECT: 911 if (cmd->arg1 == ICMP_REJECT_RST) 912 printf("reset"); 913 else if (cmd->arg1 == ICMP_UNREACH_HOST) 914 printf("reject"); 915 else 916 print_reject_code(cmd->arg1); 917 break; 918 919 case O_SKIPTO: 920 printf("skipto %u", cmd->arg1); 921 break; 922 923 case O_PIPE: 924 printf("pipe %u", cmd->arg1); 925 break; 926 927 case O_QUEUE: 928 printf("queue %u", cmd->arg1); 929 break; 930 931 case O_DIVERT: 932 printf("divert %u", cmd->arg1); 933 break; 934 935 case O_TEE: 936 printf("tee %u", cmd->arg1); 937 break; 938 939 case O_FORWARD_IP: 940 { 941 ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd; 942 943 printf("fwd %s", inet_ntoa(sa->sa.sin_addr)); 944 if (sa->sa.sin_port) 945 printf(",%d", sa->sa.sin_port); 946 } 947 break; 948 949 case O_LOG: /* O_LOG is printed last */ 950 logptr = (ipfw_insn_log *)cmd; 951 break; 952 953 default: 954 printf("** unrecognized action %d len %d", 955 cmd->opcode, cmd->len); 956 } 957 } 958 if (logptr) { 959 if (logptr->max_log > 0) 960 printf(" log logamount %d", logptr->max_log); 961 else 962 printf(" log"); 963 } 964 965 /* 966 * then print the body. 967 */ 968 if (rule->usr_flags & IPFW_USR_F_NORULE) { 969 /* empty rules before options */ 970 if (!do_compact) 971 printf(" ip from any to any"); 972 flags |= HAVE_IP | HAVE_OPTIONS; 973 } 974 975 for (l = rule->act_ofs, cmd = rule->cmd ; 976 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 977 /* useful alias */ 978 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 979 980 show_prerequisites(&flags, 0, cmd->opcode); 981 982 switch(cmd->opcode) { 983 case O_PROB: 984 break; /* done already */ 985 986 case O_PROBE_STATE: 987 break; /* no need to print anything here */ 988 989 case O_MACADDR2: { 990 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 991 992 if ((cmd->len & F_OR) && !or_block) 993 printf(" {"); 994 if (cmd->len & F_NOT) 995 printf(" not"); 996 printf(" MAC"); 997 flags |= HAVE_MAC; 998 print_mac( m->addr, m->mask); 999 print_mac( m->addr + 6, m->mask + 6); 1000 } 1001 break; 1002 1003 case O_MAC_TYPE: 1004 if ((cmd->len & F_OR) && !or_block) 1005 printf(" {"); 1006 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1007 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1008 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1009 break; 1010 1011 case O_IP_SRC: 1012 case O_IP_SRC_MASK: 1013 case O_IP_SRC_ME: 1014 case O_IP_SRC_SET: 1015 case O_IP_SRC_TABLE: 1016 case O_IP_SRC_IFIP: 1017 show_prerequisites(&flags, HAVE_PROTO, 0); 1018 if (!(flags & HAVE_SRCIP)) 1019 printf(" from"); 1020 if ((cmd->len & F_OR) && !or_block) 1021 printf(" {"); 1022 print_ip((ipfw_insn_ip *)cmd, 1023 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1024 flags |= HAVE_SRCIP; 1025 break; 1026 1027 case O_IP_DST: 1028 case O_IP_DST_MASK: 1029 case O_IP_DST_ME: 1030 case O_IP_DST_SET: 1031 case O_IP_DST_TABLE: 1032 case O_IP_DST_IFIP: 1033 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1034 if (!(flags & HAVE_DSTIP)) 1035 printf(" to"); 1036 if ((cmd->len & F_OR) && !or_block) 1037 printf(" {"); 1038 print_ip((ipfw_insn_ip *)cmd, 1039 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1040 flags |= HAVE_DSTIP; 1041 break; 1042 1043 case O_IP_DSTPORT: 1044 show_prerequisites(&flags, HAVE_IP, 0); 1045 case O_IP_SRCPORT: 1046 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1047 if ((cmd->len & F_OR) && !or_block) 1048 printf(" {"); 1049 print_newports((ipfw_insn_u16 *)cmd, proto, 1050 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1051 break; 1052 1053 case O_PROTO: { 1054 struct protoent *pe; 1055 1056 if ((cmd->len & F_OR) && !or_block) 1057 printf(" {"); 1058 if (cmd->len & F_NOT) 1059 printf(" not"); 1060 proto = cmd->arg1; 1061 pe = getprotobynumber(cmd->arg1); 1062 if (flags & HAVE_OPTIONS) 1063 printf(" proto"); 1064 if (pe) 1065 printf(" %s", pe->p_name); 1066 else 1067 printf(" %u", cmd->arg1); 1068 } 1069 flags |= HAVE_PROTO; 1070 break; 1071 1072 default: /*options ... */ 1073 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1074 if ((cmd->len & F_OR) && !or_block) 1075 printf(" {"); 1076 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1077 printf(" not"); 1078 switch(cmd->opcode) { 1079 case O_FRAG: 1080 printf(" frag"); 1081 break; 1082 1083 case O_IPFRAG: 1084 printf(" ipfrag"); 1085 break; 1086 1087 case O_IN: 1088 printf(cmd->len & F_NOT ? " out" : " in"); 1089 break; 1090 1091 case O_LAYER2: 1092 printf(" layer2"); 1093 break; 1094 case O_XMIT: 1095 case O_RECV: 1096 case O_VIA: { 1097 const char *dir; 1098 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1099 1100 if (cmd->opcode == O_XMIT) 1101 dir = "xmit"; 1102 else if (cmd->opcode == O_RECV) 1103 dir = "recv"; 1104 else if (cmd->opcode == O_VIA) 1105 dir = "via"; 1106 else 1107 dir = "?huh?"; 1108 if (cmdif->name[0] == '\0') 1109 printf(" %s %s", dir, 1110 inet_ntoa(cmdif->p.ip)); 1111 printf(" %s %s", dir, cmdif->name); 1112 } 1113 break; 1114 1115 case O_IPID: 1116 printf(" ipid %u", cmd->arg1 ); 1117 break; 1118 1119 case O_IPTTL: 1120 printf(" ipttl %u", cmd->arg1 ); 1121 break; 1122 1123 case O_IPVER: 1124 printf(" ipver %u", cmd->arg1 ); 1125 break; 1126 1127 case O_IPPRECEDENCE: 1128 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1129 break; 1130 1131 case O_IPLEN: 1132 printf(" iplen %u", cmd->arg1 ); 1133 break; 1134 1135 case O_IPOPT: 1136 print_flags("ipoptions", cmd, f_ipopts); 1137 break; 1138 1139 case O_IPTOS: 1140 print_flags("iptos", cmd, f_iptos); 1141 break; 1142 1143 case O_ICMPTYPE: 1144 print_icmptypes((ipfw_insn_u32 *)cmd); 1145 break; 1146 1147 case O_ESTAB: 1148 printf(" established"); 1149 break; 1150 1151 case O_TCPFLAGS: 1152 print_flags("tcpflags", cmd, f_tcpflags); 1153 break; 1154 1155 case O_TCPOPTS: 1156 print_flags("tcpoptions", cmd, f_tcpopts); 1157 break; 1158 1159 case O_TCPWIN: 1160 printf(" tcpwin %d", ntohs(cmd->arg1)); 1161 break; 1162 1163 case O_TCPACK: 1164 printf(" tcpack %u", ntohl(cmd32->d[0])); 1165 break; 1166 1167 case O_TCPSEQ: 1168 printf(" tcpseq %u", ntohl(cmd32->d[0])); 1169 break; 1170 1171 case O_UID: 1172 { 1173 struct passwd *pwd = getpwuid(cmd32->d[0]); 1174 1175 if (pwd) 1176 printf(" uid %s", pwd->pw_name); 1177 else 1178 printf(" uid %u", cmd32->d[0]); 1179 } 1180 break; 1181 1182 case O_GID: 1183 { 1184 struct group *grp = getgrgid(cmd32->d[0]); 1185 1186 if (grp) 1187 printf(" gid %s", grp->gr_name); 1188 else 1189 printf(" gid %u", cmd32->d[0]); 1190 } 1191 break; 1192 1193 case O_KEEP_STATE: 1194 printf(" keep-state"); 1195 break; 1196 1197 case O_REDIRECT: 1198 { 1199 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd; 1200 1201 printf(" rdr %s", inet_ntoa(c->addr)); 1202 if (c->port != 0) 1203 printf(",%u", ntohs(c->port)); 1204 break; 1205 } 1206 1207 case O_LIMIT: 1208 { 1209 struct _s_x *p = limit_masks; 1210 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1211 u_int8_t x = c->limit_mask; 1212 const char *comma = " "; 1213 1214 printf(" limit"); 1215 for ( ; p->x != 0 ; p++) 1216 if ((x & p->x) == p->x) { 1217 x &= ~p->x; 1218 printf("%s%s", comma, p->s); 1219 comma = ","; 1220 } 1221 printf(" %d", c->conn_limit); 1222 } 1223 break; 1224 1225 default: 1226 printf(" [opcode %d len %d]", 1227 cmd->opcode, cmd->len); 1228 } 1229 } 1230 if (cmd->len & F_OR) { 1231 printf(" or"); 1232 or_block = 1; 1233 } else if (or_block) { 1234 printf(" }"); 1235 or_block = 0; 1236 } 1237 } 1238 show_prerequisites(&flags, HAVE_IP, 0); 1239 1240 printf("\n"); 1241 } 1242 1243 static void 1244 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth) 1245 { 1246 struct protoent *pe; 1247 struct in_addr a; 1248 1249 if (!do_expired) { 1250 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1251 return; 1252 } 1253 1254 printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt, 1255 bcwidth, (uintmax_t)d->bcnt, d->expire); 1256 switch (d->dyn_type) { 1257 case O_LIMIT_PARENT: 1258 printf(" PARENT %d", d->count); 1259 break; 1260 case O_LIMIT: 1261 printf(" LIMIT"); 1262 break; 1263 case O_KEEP_STATE: /* bidir, no mask */ 1264 printf(" STATE"); 1265 break; 1266 case O_REDIRECT: 1267 printf(" REDIRECT"); 1268 break; 1269 } 1270 1271 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL) 1272 printf(" %s", pe->p_name); 1273 else 1274 printf(" proto %u", d->id.u.ip.proto); 1275 1276 a.s_addr = htonl(d->id.u.ip.src_ip); 1277 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port); 1278 1279 a.s_addr = htonl(d->id.u.ip.dst_ip); 1280 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port); 1281 1282 if (d->dyn_type == O_REDIRECT) { 1283 struct in_addr xlat_addr; 1284 1285 xlat_addr.s_addr = htonl(d->xlat_addr); 1286 printf(" => %s %d", inet_ntoa(xlat_addr), d->xlat_port); 1287 } 1288 printf("\n"); 1289 } 1290 1291 static int 1292 sort_q(const void *pa, const void *pb) 1293 { 1294 int rev = (do_sort < 0); 1295 int field = rev ? -do_sort : do_sort; 1296 long long res = 0; 1297 const struct dn_ioc_flowqueue *a = pa; 1298 const struct dn_ioc_flowqueue *b = pb; 1299 1300 switch (field) { 1301 case 1: /* pkts */ 1302 res = a->len - b->len; 1303 break; 1304 case 2: /* bytes */ 1305 res = a->len_bytes - b->len_bytes; 1306 break; 1307 1308 case 3: /* tot pkts */ 1309 res = a->tot_pkts - b->tot_pkts; 1310 break; 1311 1312 case 4: /* tot bytes */ 1313 res = a->tot_bytes - b->tot_bytes; 1314 break; 1315 } 1316 if (res < 0) 1317 res = -1; 1318 if (res > 0) 1319 res = 1; 1320 return (int)(rev ? res : -res); 1321 } 1322 1323 static void 1324 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) 1325 { 1326 int l; 1327 1328 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1329 fs->flow_mask.u.ip.proto, 1330 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, 1331 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); 1332 if (fs->rq_elements == 0) 1333 return; 1334 1335 printf("BKT Prot ___Source IP/port____ " 1336 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1337 if (do_sort != 0) 1338 heapsort(q, fs->rq_elements, sizeof(*q), sort_q); 1339 for (l = 0; l < fs->rq_elements; l++) { 1340 struct in_addr ina; 1341 struct protoent *pe; 1342 1343 ina.s_addr = htonl(q[l].id.u.ip.src_ip); 1344 printf("%3d ", q[l].hash_slot); 1345 pe = getprotobynumber(q[l].id.u.ip.proto); 1346 if (pe) 1347 printf("%-4s ", pe->p_name); 1348 else 1349 printf("%4u ", q[l].id.u.ip.proto); 1350 printf("%15s/%-5d ", 1351 inet_ntoa(ina), q[l].id.u.ip.src_port); 1352 ina.s_addr = htonl(q[l].id.u.ip.dst_ip); 1353 printf("%15s/%-5d ", 1354 inet_ntoa(ina), q[l].id.u.ip.dst_port); 1355 printf("%4ju %8ju %2u %4u %3u\n", 1356 (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes, 1357 q[l].len, q[l].len_bytes, q[l].drops); 1358 if (verbose) 1359 printf(" S %20ju F %20ju\n", 1360 (uintmax_t)q[l].S, (uintmax_t)q[l].F); 1361 } 1362 } 1363 1364 static void 1365 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) 1366 { 1367 int l; 1368 char qs[30]; 1369 char plr[30]; 1370 char red[90]; /* Display RED parameters */ 1371 1372 l = fs->qsize; 1373 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1374 if (l >= 8192) 1375 sprintf(qs, "%d KB", l / 1024); 1376 else 1377 sprintf(qs, "%d B", l); 1378 } else 1379 sprintf(qs, "%3d sl.", l); 1380 if (fs->plr) 1381 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1382 else 1383 plr[0] = '\0'; 1384 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1385 sprintf(red, 1386 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1387 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1388 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1389 SCALE_VAL(fs->min_th), 1390 SCALE_VAL(fs->max_th), 1391 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1392 else 1393 sprintf(red, "droptail"); 1394 1395 printf("%s %s%s %d queues (%d buckets) %s\n", 1396 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1397 } 1398 1399 static void 1400 list_pipes(void *data, int nbytes, int ac, char *av[]) 1401 { 1402 u_long rulenum; 1403 void *next = data; 1404 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; 1405 struct dn_ioc_flowset *fs; 1406 struct dn_ioc_flowqueue *q; 1407 int l; 1408 1409 if (ac > 0) 1410 rulenum = strtoul(*av++, NULL, 10); 1411 else 1412 rulenum = 0; 1413 for (; nbytes >= (int)sizeof(*p); p = (struct dn_ioc_pipe *)next) { 1414 double b = p->bandwidth; 1415 char buf[30]; 1416 char prefix[80]; 1417 1418 if (p->fs.fs_type != DN_IS_PIPE) 1419 break; /* done with pipes, now queues */ 1420 1421 /* 1422 * compute length, as pipe have variable size 1423 */ 1424 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1425 next = (uint8_t *)p + l; 1426 nbytes -= l; 1427 1428 if (rulenum != 0 && rulenum != (u_long)p->pipe_nr) 1429 continue; 1430 1431 /* 1432 * Print rate 1433 */ 1434 if (b == 0) 1435 sprintf(buf, "unlimited"); 1436 else if (b >= 1000000) 1437 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1438 else if (b >= 1000) 1439 sprintf(buf, "%7.3f Kbit/s", b/1000); 1440 else 1441 sprintf(buf, "%7.3f bit/s ", b); 1442 1443 sprintf(prefix, "%05d: %s %4d ms ", 1444 p->pipe_nr, buf, p->delay); 1445 print_flowset_parms(&p->fs, prefix); 1446 if (verbose) 1447 printf(" V %20ju\n", (uintmax_t)p->V >> MY_M); 1448 1449 q = (struct dn_ioc_flowqueue *)(p+1); 1450 list_queues(&p->fs, q); 1451 } 1452 for (fs = next; nbytes >= (int)sizeof(*fs); fs = next) { 1453 char prefix[80]; 1454 1455 if (fs->fs_type != DN_IS_QUEUE) 1456 break; 1457 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1458 next = (uint8_t *)fs + l; 1459 nbytes -= l; 1460 q = (struct dn_ioc_flowqueue *)(fs+1); 1461 sprintf(prefix, "q%05d: weight %d pipe %d ", 1462 fs->fs_nr, fs->weight, fs->parent_nr); 1463 print_flowset_parms(fs, prefix); 1464 list_queues(fs, q); 1465 } 1466 } 1467 1468 /* 1469 * This one handles all set-related commands 1470 * ipfw set { show | enable | disable } 1471 * ipfw set swap X Y 1472 * ipfw set move X to Y 1473 * ipfw set move rule X to Y 1474 */ 1475 static void 1476 sets_handler(int ac, char *av[]) 1477 { 1478 u_int32_t set_disable, masks[2]; 1479 int i, nbytes; 1480 u_int16_t rulenum; 1481 u_int8_t cmd, new_set; 1482 1483 ac--; 1484 av++; 1485 1486 if (!ac) 1487 errx(EX_USAGE, "set needs command"); 1488 if (!strncmp(*av, "show", strlen(*av)) ) { 1489 void *data; 1490 const char *msg; 1491 1492 nbytes = sizeof(struct ipfw_ioc_rule); 1493 if ((data = malloc(nbytes)) == NULL) 1494 err(EX_OSERR, "malloc"); 1495 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1496 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1497 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable; 1498 1499 for (i = 0, msg = "disable" ; i < 31; i++) 1500 if ( (set_disable & (1<<i))) { 1501 printf("%s %d", msg, i); 1502 msg = ""; 1503 } 1504 msg = (set_disable) ? " enable" : "enable"; 1505 for (i = 0; i < 31; i++) 1506 if ( !(set_disable & (1<<i))) { 1507 printf("%s %d", msg, i); 1508 msg = ""; 1509 } 1510 printf("\n"); 1511 } else if (!strncmp(*av, "swap", strlen(*av))) { 1512 ac--; av++; 1513 if (ac != 2) 1514 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1515 rulenum = atoi(av[0]); 1516 new_set = atoi(av[1]); 1517 if (!isdigit(*(av[0])) || rulenum > 30) 1518 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1519 if (!isdigit(*(av[1])) || new_set > 30) 1520 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1521 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1522 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1523 masks, sizeof(u_int32_t)); 1524 } else if (!strncmp(*av, "move", strlen(*av))) { 1525 ac--; av++; 1526 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1527 cmd = 2; 1528 ac--; av++; 1529 } else 1530 cmd = 3; 1531 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1532 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1533 rulenum = atoi(av[0]); 1534 new_set = atoi(av[2]); 1535 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1536 (cmd == 2 && rulenum == 65535) ) 1537 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1538 if (!isdigit(*(av[2])) || new_set > 30) 1539 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1540 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1541 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1542 masks, sizeof(u_int32_t)); 1543 } else if (!strncmp(*av, "disable", strlen(*av)) || 1544 !strncmp(*av, "enable", strlen(*av)) ) { 1545 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1546 1547 ac--; av++; 1548 masks[0] = masks[1] = 0; 1549 1550 while (ac) { 1551 if (isdigit(**av)) { 1552 i = atoi(*av); 1553 if (i < 0 || i > 30) 1554 errx(EX_DATAERR, 1555 "invalid set number %d\n", i); 1556 masks[which] |= (1<<i); 1557 } else if (!strncmp(*av, "disable", strlen(*av))) 1558 which = 0; 1559 else if (!strncmp(*av, "enable", strlen(*av))) 1560 which = 1; 1561 else 1562 errx(EX_DATAERR, 1563 "invalid set command %s\n", *av); 1564 av++; ac--; 1565 } 1566 if ( (masks[0] & masks[1]) != 0 ) 1567 errx(EX_DATAERR, 1568 "cannot enable and disable the same set\n"); 1569 1570 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1571 if (i) 1572 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1573 } else 1574 errx(EX_USAGE, "invalid set command %s\n", *av); 1575 } 1576 1577 static void 1578 sysctl_handler(int ac, char *av[], int which) 1579 { 1580 ac--; 1581 av++; 1582 1583 if (*av == NULL) { 1584 warnx("missing keyword to enable/disable\n"); 1585 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1586 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1587 &which, sizeof(which)); 1588 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1589 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1590 &which, sizeof(which)); 1591 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1592 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1593 &which, sizeof(which)); 1594 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1595 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1596 &which, sizeof(which)); 1597 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1598 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1599 &which, sizeof(which)); 1600 } else { 1601 warnx("unrecognize enable/disable keyword: %s\n", *av); 1602 } 1603 } 1604 1605 static void 1606 list(int ac, char *av[]) 1607 { 1608 struct ipfw_ioc_rule *r; 1609 struct ipfw_ioc_state *dynrules, *d; 1610 1611 void *data = NULL; 1612 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1613 int exitval = EX_OK; 1614 int lac; 1615 char **lav; 1616 u_long rnum; 1617 char *endptr; 1618 int seen = 0; 1619 1620 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1621 int nalloc = 1024; /* start somewhere... */ 1622 1623 ac--; 1624 av++; 1625 1626 /* get rules or pipes from kernel, resizing array as necessary */ 1627 nbytes = nalloc; 1628 1629 while (nbytes >= nalloc) { 1630 nalloc = nalloc * 2 + 200; 1631 nbytes = nalloc; 1632 if ((data = realloc(data, nbytes)) == NULL) 1633 err(EX_OSERR, "realloc"); 1634 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1635 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1636 do_pipe ? "DUMMYNET" : "FW"); 1637 } 1638 1639 if (do_pipe) { 1640 list_pipes(data, nbytes, ac, av); 1641 goto done; 1642 } 1643 1644 /* 1645 * Count static rules. 1646 */ 1647 r = data; 1648 nstat = r->static_count; 1649 1650 /* 1651 * Count dynamic rules. This is easier as they have 1652 * fixed size. 1653 */ 1654 dynrules = (struct ipfw_ioc_state *)((uint8_t *)r + r->static_len); 1655 ndyn = (nbytes - r->static_len) / sizeof(*dynrules); 1656 1657 /* if showing stats, figure out column widths ahead of time */ 1658 bcwidth = pcwidth = 0; 1659 if (do_acct) { 1660 for (n = 0, r = data; n < nstat; n++, 1661 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) { 1662 /* packet counter */ 1663 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt); 1664 if (width > pcwidth) 1665 pcwidth = width; 1666 1667 /* byte counter */ 1668 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt); 1669 if (width > bcwidth) 1670 bcwidth = width; 1671 } 1672 } 1673 if (do_dynamic && ndyn) { 1674 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1675 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt); 1676 if (width > pcwidth) 1677 pcwidth = width; 1678 1679 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt); 1680 if (width > bcwidth) 1681 bcwidth = width; 1682 } 1683 } 1684 /* if no rule numbers were specified, list all rules */ 1685 if (ac == 0) { 1686 for (n = 0, r = data; n < nstat; n++, 1687 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) 1688 show_ipfw(r, pcwidth, bcwidth); 1689 1690 if (do_dynamic && ndyn) { 1691 printf("## Dynamic rules (%d):\n", ndyn); 1692 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1693 show_dyn_ipfw(d, pcwidth, bcwidth); 1694 } 1695 goto done; 1696 } 1697 1698 /* display specific rules requested on command line */ 1699 1700 for (lac = ac, lav = av; lac != 0; lac--) { 1701 /* convert command line rule # */ 1702 rnum = strtoul(*lav++, &endptr, 10); 1703 if (*endptr) { 1704 exitval = EX_USAGE; 1705 warnx("invalid rule number: %s", *(lav - 1)); 1706 continue; 1707 } 1708 for (n = seen = 0, r = data; n < nstat; n++, 1709 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) { 1710 if (r->rulenum > rnum) 1711 break; 1712 if (r->rulenum == rnum) { 1713 show_ipfw(r, pcwidth, bcwidth); 1714 seen = 1; 1715 } 1716 } 1717 if (!seen) { 1718 /* give precedence to other error(s) */ 1719 if (exitval == EX_OK) 1720 exitval = EX_UNAVAILABLE; 1721 warnx("rule %lu does not exist", rnum); 1722 } 1723 } 1724 1725 if (do_dynamic && ndyn) { 1726 printf("## Dynamic rules:\n"); 1727 for (lac = ac, lav = av; lac != 0; lac--) { 1728 rnum = strtoul(*lav++, &endptr, 10); 1729 if (*endptr) 1730 /* already warned */ 1731 continue; 1732 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1733 if (d->rulenum > rnum) 1734 break; 1735 if (d->rulenum == rnum) 1736 show_dyn_ipfw(d, pcwidth, bcwidth); 1737 } 1738 } 1739 } 1740 1741 ac = 0; 1742 1743 done: 1744 free(data); 1745 1746 if (exitval != EX_OK) 1747 exit(exitval); 1748 } 1749 1750 static void 1751 show_usage(void) 1752 { 1753 fprintf(stderr, "usage: ipfw [options]\n" 1754 " add [number] rule\n" 1755 " pipe number config [pipeconfig]\n" 1756 " queue number config [queueconfig]\n" 1757 " [pipe] flush\n" 1758 " [pipe] delete number ...\n" 1759 " [pipe] {list|show} [number ...]\n" 1760 " {zero|resetlog} [number ...]\n" 1761 "do \"ipfw -h\" or see ipfw manpage for details\n" 1762 ); 1763 1764 exit(EX_USAGE); 1765 } 1766 1767 static void 1768 help(void) 1769 { 1770 1771 fprintf(stderr, "ipfw syntax summary:\n" 1772 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1773 "ipfw {pipe|queue} N config BODY\n" 1774 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1775 "\n" 1776 "RULE: [1..] [PROB] BODY\n" 1777 "RULENUM: INTEGER(1..65534)\n" 1778 "PROB: prob REAL(0..1)\n" 1779 "BODY: check-state [LOG] (no body) |\n" 1780 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1781 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1782 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1783 "ADDR: [ MAC dst src ether_type ] \n" 1784 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1785 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1786 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1787 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1788 ); 1789 exit(0); 1790 } 1791 1792 1793 static int 1794 lookup_host (char *host, struct in_addr *ipaddr) 1795 { 1796 struct hostent *he; 1797 1798 if (!inet_aton(host, ipaddr)) { 1799 if ((he = gethostbyname(host)) == NULL) 1800 return(-1); 1801 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1802 } 1803 return(0); 1804 } 1805 1806 /* 1807 * fills the addr and mask fields in the instruction as appropriate from av. 1808 * Update length as appropriate. 1809 * The following formats are allowed: 1810 * any matches any IP. Actually returns an empty instruction. 1811 * me returns O_IP_*_ME 1812 * <table_id> O_IP_*_TABLE 1813 * [iface[:net]] O_IP_*_IFIP 1814 * 1.2.3.4 single IP address 1815 * 1.2.3.4:5.6.7.8 address:mask 1816 * 1.2.3.4/24 address/mask 1817 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1818 */ 1819 static void 1820 fill_ip(ipfw_insn_ip *cmd, char *av) 1821 { 1822 char *p = NULL, md = 0; 1823 u_int32_t i; 1824 1825 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1826 1827 if (!strncmp(av, "any", strlen(av))) 1828 return; 1829 1830 if (!strncmp(av, "me", strlen(av))) { 1831 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1832 return; 1833 } 1834 1835 if (strlen(av) >= 3 && av[0] == '<' && av[strlen(av) - 1] == '>') { 1836 int pos = strlen(av) - 1; 1837 uint16_t tableid; 1838 char *eptr; 1839 1840 /* 1841 * Table: "<tableid>" 1842 */ 1843 av[pos] = '\0'; 1844 tableid = strtoul(&av[1], &eptr, 0); 1845 if (*eptr != '\0') { 1846 av[pos] = '>'; 1847 errx(EX_DATAERR, "invalid tableid ``%s''", av); 1848 } 1849 av[pos] = '>'; 1850 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1851 cmd->o.opcode = O_IP_DST_TABLE; 1852 cmd->o.arg1 = tableid; 1853 return; 1854 } 1855 1856 if (strlen(av) >= 3 && av[0] == '[' && av[strlen(av) - 1] == ']') { 1857 int pos = strlen(av) - 1; 1858 ipfw_insn_ifip *cmd1 = (ipfw_insn_ifip *)cmd; 1859 char *c; 1860 1861 /* 1862 * Interface IP: "[ifname[:net]]" 1863 */ 1864 cmd1->o.len |= F_INSN_SIZE(ipfw_insn_ifip); 1865 cmd1->o.opcode = O_IP_DST_IFIP; 1866 cmd1->o.arg1 = 0; 1867 cmd1->addr.s_addr = 0; 1868 cmd1->mask.s_addr = 0; 1869 1870 av[pos] = '\0'; 1871 c = strchr(av, ':'); 1872 if (c != NULL) { 1873 if (strcmp(c + 1, "net") == 0) { 1874 cmd1->o.arg1 |= IPFW_IFIP_NET; 1875 } else { 1876 errx(EX_DATAERR, "invalid ifname modifier: %s", 1877 c + 1); 1878 } 1879 *c = '\0'; 1880 } 1881 1882 strlcpy(cmd1->ifname, &av[1], sizeof(cmd1->ifname)); 1883 if (c != NULL) 1884 *c = ':'; 1885 av[pos] = ']'; 1886 return; 1887 } 1888 1889 p = strchr(av, '/'); 1890 if (!p) 1891 p = strchr(av, ':'); 1892 if (p) { 1893 md = *p; 1894 *p++ = '\0'; 1895 } 1896 1897 if (lookup_host(av, &cmd->addr) != 0) 1898 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1899 switch (md) { 1900 case ':': 1901 if (!inet_aton(p, &cmd->mask)) 1902 errx(EX_DATAERR, "bad netmask ``%s''", p); 1903 break; 1904 case '/': 1905 i = atoi(p); 1906 if (i == 0) 1907 cmd->mask.s_addr = htonl(0); 1908 else if (i > 32) 1909 errx(EX_DATAERR, "bad width ``%s''", p); 1910 else 1911 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1912 break; 1913 default: 1914 cmd->mask.s_addr = htonl(~0); 1915 break; 1916 } 1917 cmd->addr.s_addr &= cmd->mask.s_addr; 1918 /* 1919 * now look if we have a set of addresses. They are stored as follows: 1920 * arg1 is the set size (powers of 2, 2..256) 1921 * addr is the base address IN HOST FORMAT 1922 * mask.. is an array of u_int32_t with bits set. 1923 */ 1924 if (p) 1925 p = strchr(p, '{'); 1926 if (p) { /* fetch addresses */ 1927 u_int32_t *d; 1928 int low, high; 1929 int ii = contigmask((u_char *)&(cmd->mask), 32); 1930 1931 if (ii < 24 || ii > 31) { 1932 fprintf(stderr, "invalid set with mask %d\n", 1933 ii); 1934 exit(0); 1935 } 1936 cmd->o.arg1 = 1<<(32-ii); 1937 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1938 d = (u_int32_t *)&cmd->mask; 1939 cmd->o.opcode = O_IP_DST_SET; /* default */ 1940 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1941 for (ii = 0; ii < (cmd->o.arg1+31)/32 ; ii++) 1942 d[ii] = 0; /* clear masks */ 1943 1944 av = p+1; 1945 low = cmd->addr.s_addr & 0xff; 1946 high = low + cmd->o.arg1 - 1; 1947 while (isdigit(*av)) { 1948 char *str; 1949 u_int16_t a = strtol(av, &str, 0); 1950 1951 if (str == av) /* no parameter */ 1952 break; 1953 if (a < low || a > high) { 1954 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1955 a, low, high); 1956 exit(0); 1957 } 1958 a -= low; 1959 d[ a/32] |= 1<<(a & 31); 1960 if (*str != ',') 1961 break; 1962 av = str+1; 1963 } 1964 return; 1965 } 1966 1967 if (cmd->mask.s_addr == 0) { /* any */ 1968 if (cmd->o.len & F_NOT) 1969 errx(EX_DATAERR, "not any never matches"); 1970 else /* useless, nuke it */ 1971 return; 1972 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1973 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1974 else /* addr/mask */ 1975 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1976 } 1977 1978 1979 /* 1980 * helper function to process a set of flags and set bits in the 1981 * appropriate masks. 1982 */ 1983 static void 1984 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1985 struct _s_x *flags, char *p) 1986 { 1987 u_int8_t set=0, clear=0; 1988 1989 while (p && *p) { 1990 char *q; /* points to the separator */ 1991 int val; 1992 u_int8_t *which; /* mask we are working on */ 1993 1994 if (*p == '!') { 1995 p++; 1996 which = &clear; 1997 } else 1998 which = &set; 1999 q = strchr(p, ','); 2000 if (q) 2001 *q++ = '\0'; 2002 val = match_token(flags, p); 2003 if (val <= 0) 2004 errx(EX_DATAERR, "invalid flag %s", p); 2005 *which |= (u_int8_t)val; 2006 p = q; 2007 } 2008 cmd->opcode = opcode; 2009 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2010 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2011 } 2012 2013 2014 static void 2015 delete(int ac, char *av[]) 2016 { 2017 u_int32_t rulenum; 2018 struct dn_ioc_pipe pipe; 2019 int i; 2020 int exitval = EX_OK; 2021 int do_set = 0; 2022 2023 memset(&pipe, 0, sizeof pipe); 2024 2025 av++; ac--; 2026 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 2027 do_set = 1; /* delete set */ 2028 ac--; av++; 2029 } 2030 2031 /* Rule number */ 2032 while (ac && isdigit(**av)) { 2033 i = atoi(*av); av++; ac--; 2034 if (do_pipe) { 2035 if (do_pipe == 1) 2036 pipe.pipe_nr = i; 2037 else 2038 pipe.fs.fs_nr = i; 2039 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 2040 &pipe, sizeof pipe); 2041 if (i) { 2042 exitval = 1; 2043 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2044 do_pipe == 1 ? pipe.pipe_nr : 2045 pipe.fs.fs_nr); 2046 } 2047 } else { 2048 rulenum = (i & 0xffff) | (do_set << 24); 2049 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 2050 sizeof rulenum); 2051 if (i) { 2052 exitval = EX_UNAVAILABLE; 2053 warn("rule %u: setsockopt(IP_FW_DEL)", 2054 rulenum); 2055 } 2056 } 2057 } 2058 if (exitval != EX_OK) 2059 exit(exitval); 2060 } 2061 2062 2063 /* 2064 * fill the interface structure. We do not check the name as we can 2065 * create interfaces dynamically, so checking them at insert time 2066 * makes relatively little sense. 2067 * Interface names containing '*', '?', or '[' are assumed to be shell 2068 * patterns which match interfaces. 2069 */ 2070 static void 2071 fill_iface(ipfw_insn_if *cmd, char *arg) 2072 { 2073 cmd->name[0] = '\0'; 2074 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2075 2076 /* Parse the interface or address */ 2077 if (!strcmp(arg, "any")) 2078 cmd->o.len = 0; /* effectively ignore this command */ 2079 else if (!isdigit(*arg)) { 2080 strlcpy(cmd->name, arg, sizeof(cmd->name)); 2081 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 2082 } else if (!inet_aton(arg, &cmd->p.ip)) 2083 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2084 } 2085 2086 static unsigned long 2087 getbw(const char *str, u_short *flags, int kb) 2088 { 2089 char *end; 2090 unsigned long val; 2091 int inbytes = 0; 2092 2093 val = strtoul(str, &end, 0); 2094 if (*end == 'k' || *end == 'K') { 2095 ++end; 2096 val *= kb; 2097 } else if (*end == 'm' || *end == 'M') { 2098 ++end; 2099 val *= kb * kb; 2100 } 2101 2102 /* 2103 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 2104 * trailer assume bits. 2105 */ 2106 if (strncasecmp(end, "bit", 3) == 0) { 2107 ; 2108 } else if (strncasecmp(end, "byte", 4) == 0) { 2109 inbytes = 1; 2110 } else if (*end == 'b') { 2111 ; 2112 } else if (*end == 'B') { 2113 inbytes = 1; 2114 } 2115 2116 /* 2117 * Return in bits if flags is NULL, else flag bits 2118 * or bytes in flags and return the unconverted value. 2119 */ 2120 if (inbytes && flags) 2121 *flags |= DN_QSIZE_IS_BYTES; 2122 else if (inbytes && flags == NULL) 2123 val *= 8; 2124 return(val); 2125 } 2126 2127 /* 2128 * the following macro returns an error message if we run out of 2129 * arguments. 2130 */ 2131 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2132 2133 static void 2134 config_pipe(int ac, char **av) 2135 { 2136 struct dn_ioc_pipe pipe; 2137 int i; 2138 char *end; 2139 u_int32_t a; 2140 2141 memset(&pipe, 0, sizeof pipe); 2142 2143 av++; ac--; 2144 /* Pipe number */ 2145 if (ac && isdigit(**av)) { 2146 i = atoi(*av); av++; ac--; 2147 if (do_pipe == 1) 2148 pipe.pipe_nr = i; 2149 else 2150 pipe.fs.fs_nr = i; 2151 } 2152 while (ac > 0) { 2153 double d; 2154 int tok = match_token(dummynet_params, *av); 2155 ac--; av++; 2156 2157 switch(tok) { 2158 case TOK_NOERROR: 2159 pipe.fs.flags_fs |= DN_NOERROR; 2160 break; 2161 2162 case TOK_PLR: 2163 NEED1("plr needs argument 0..1\n"); 2164 d = strtod(av[0], NULL); 2165 if (d > 1) 2166 d = 1; 2167 else if (d < 0) 2168 d = 0; 2169 pipe.fs.plr = (int)(d*0x7fffffff); 2170 ac--; av++; 2171 break; 2172 2173 case TOK_QUEUE: 2174 NEED1("queue needs queue size\n"); 2175 end = NULL; 2176 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2177 ac--; av++; 2178 break; 2179 2180 case TOK_BUCKETS: 2181 NEED1("buckets needs argument\n"); 2182 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2183 ac--; av++; 2184 break; 2185 2186 case TOK_MASK: 2187 NEED1("mask needs mask specifier\n"); 2188 /* 2189 * per-flow queue, mask is dst_ip, dst_port, 2190 * src_ip, src_port, proto measured in bits 2191 */ 2192 2193 pipe.fs.flow_mask.type = ETHERTYPE_IP; 2194 pipe.fs.flow_mask.u.ip.dst_ip = 0; 2195 pipe.fs.flow_mask.u.ip.src_ip = 0; 2196 pipe.fs.flow_mask.u.ip.dst_port = 0; 2197 pipe.fs.flow_mask.u.ip.src_port = 0; 2198 pipe.fs.flow_mask.u.ip.proto = 0; 2199 end = NULL; 2200 2201 while (ac >= 1) { 2202 u_int32_t *p32 = NULL; 2203 u_int16_t *p16 = NULL; 2204 2205 tok = match_token(dummynet_params, *av); 2206 ac--; av++; 2207 switch(tok) { 2208 case TOK_ALL: 2209 /* 2210 * special case, all bits significant 2211 */ 2212 pipe.fs.flow_mask.u.ip.dst_ip = ~0; 2213 pipe.fs.flow_mask.u.ip.src_ip = ~0; 2214 pipe.fs.flow_mask.u.ip.dst_port = ~0; 2215 pipe.fs.flow_mask.u.ip.src_port = ~0; 2216 pipe.fs.flow_mask.u.ip.proto = ~0; 2217 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2218 goto end_mask; 2219 2220 case TOK_DSTIP: 2221 p32 = &pipe.fs.flow_mask.u.ip.dst_ip; 2222 break; 2223 2224 case TOK_SRCIP: 2225 p32 = &pipe.fs.flow_mask.u.ip.src_ip; 2226 break; 2227 2228 case TOK_DSTPORT: 2229 p16 = &pipe.fs.flow_mask.u.ip.dst_port; 2230 break; 2231 2232 case TOK_SRCPORT: 2233 p16 = &pipe.fs.flow_mask.u.ip.src_port; 2234 break; 2235 2236 case TOK_PROTO: 2237 break; 2238 2239 default: 2240 ac++; av--; /* backtrack */ 2241 goto end_mask; 2242 } 2243 if (ac < 1) 2244 errx(EX_USAGE, "mask: value missing"); 2245 if (*av[0] == '/') { 2246 a = strtoul(av[0]+1, &end, 0); 2247 a = (a == 32) ? ~0 : (1 << a) - 1; 2248 } else 2249 a = strtoul(av[0], &end, 0); 2250 if (p32 != NULL) 2251 *p32 = a; 2252 else if (p16 != NULL) { 2253 if (a > 65535) 2254 errx(EX_DATAERR, 2255 "mask: must be 16 bit"); 2256 *p16 = (u_int16_t)a; 2257 } else { 2258 if (a > 255) 2259 errx(EX_DATAERR, 2260 "mask: must be 8 bit"); 2261 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; 2262 } 2263 if (a != 0) 2264 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2265 ac--; av++; 2266 } /* end while, config masks */ 2267 end_mask: 2268 break; 2269 2270 case TOK_RED: 2271 case TOK_GRED: 2272 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2273 pipe.fs.flags_fs |= DN_IS_RED; 2274 if (tok == TOK_GRED) 2275 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2276 /* 2277 * the format for parameters is w_q/min_th/max_th/max_p 2278 */ 2279 if ((end = strsep(&av[0], "/"))) { 2280 double w_q = strtod(end, NULL); 2281 if (w_q > 1 || w_q <= 0) 2282 errx(EX_DATAERR, "0 < w_q <= 1"); 2283 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2284 } 2285 if ((end = strsep(&av[0], "/"))) { 2286 pipe.fs.min_th = strtoul(end, &end, 0); 2287 if (*end == 'K' || *end == 'k') 2288 pipe.fs.min_th *= 1024; 2289 } 2290 if ((end = strsep(&av[0], "/"))) { 2291 pipe.fs.max_th = strtoul(end, &end, 0); 2292 if (*end == 'K' || *end == 'k') 2293 pipe.fs.max_th *= 1024; 2294 } 2295 if ((end = strsep(&av[0], "/"))) { 2296 double max_p = strtod(end, NULL); 2297 if (max_p > 1 || max_p <= 0) 2298 errx(EX_DATAERR, "0 < max_p <= 1"); 2299 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2300 } 2301 ac--; av++; 2302 break; 2303 2304 case TOK_DROPTAIL: 2305 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2306 break; 2307 2308 case TOK_BW: 2309 NEED1("bw needs bandwidth\n"); 2310 if (do_pipe != 1) 2311 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2312 /* 2313 * set bandwidth value 2314 */ 2315 pipe.bandwidth = getbw(av[0], NULL, 1000); 2316 if (pipe.bandwidth < 0) 2317 errx(EX_DATAERR, "bandwidth too large"); 2318 ac--; av++; 2319 break; 2320 2321 case TOK_DELAY: 2322 if (do_pipe != 1) 2323 errx(EX_DATAERR, "delay only valid for pipes"); 2324 NEED1("delay needs argument 0..10000ms\n"); 2325 pipe.delay = strtoul(av[0], NULL, 0); 2326 ac--; av++; 2327 break; 2328 2329 case TOK_WEIGHT: 2330 if (do_pipe == 1) 2331 errx(EX_DATAERR,"weight only valid for queues"); 2332 NEED1("weight needs argument 0..100\n"); 2333 pipe.fs.weight = strtoul(av[0], &end, 0); 2334 ac--; av++; 2335 break; 2336 2337 case TOK_PIPE: 2338 if (do_pipe == 1) 2339 errx(EX_DATAERR,"pipe only valid for queues"); 2340 NEED1("pipe needs pipe_number\n"); 2341 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2342 ac--; av++; 2343 break; 2344 2345 default: 2346 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2347 } 2348 } 2349 if (do_pipe == 1) { 2350 if (pipe.pipe_nr == 0) 2351 errx(EX_DATAERR, "pipe_nr must be > 0"); 2352 if (pipe.delay > 10000) 2353 errx(EX_DATAERR, "delay must be < 10000"); 2354 } else { /* do_pipe == 2, queue */ 2355 if (pipe.fs.parent_nr == 0) 2356 errx(EX_DATAERR, "pipe must be > 0"); 2357 if (pipe.fs.weight >100) 2358 errx(EX_DATAERR, "weight must be <= 100"); 2359 } 2360 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2361 if (pipe.fs.qsize > 1024*1024) 2362 errx(EX_DATAERR, "queue size must be < 1MB"); 2363 } else { 2364 if (pipe.fs.qsize > 100) 2365 errx(EX_DATAERR, "2 <= queue size <= 100"); 2366 } 2367 if (pipe.fs.flags_fs & DN_IS_RED) { 2368 size_t len; 2369 int lookup_depth, avg_pkt_size; 2370 double step, idle, weight, w_q; 2371 int clock_hz; 2372 int t; 2373 2374 if (pipe.fs.min_th >= pipe.fs.max_th) 2375 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2376 pipe.fs.min_th, pipe.fs.max_th); 2377 if (pipe.fs.max_th == 0) 2378 errx(EX_DATAERR, "max_th must be > 0"); 2379 2380 len = sizeof(int); 2381 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2382 &lookup_depth, &len, NULL, 0) == -1) 2383 2384 errx(1, "sysctlbyname(\"%s\")", 2385 "net.inet.ip.dummynet.red_lookup_depth"); 2386 if (lookup_depth == 0) 2387 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2388 " must be greater than zero"); 2389 2390 len = sizeof(int); 2391 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2392 &avg_pkt_size, &len, NULL, 0) == -1) 2393 2394 errx(1, "sysctlbyname(\"%s\")", 2395 "net.inet.ip.dummynet.red_avg_pkt_size"); 2396 if (avg_pkt_size == 0) 2397 errx(EX_DATAERR, 2398 "net.inet.ip.dummynet.red_avg_pkt_size must" 2399 " be greater than zero"); 2400 2401 len = sizeof(clock_hz); 2402 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, 2403 NULL, 0) == -1) { 2404 errx(1, "sysctlbyname(\"%s\")", 2405 "net.inet.ip.dummynet.hz"); 2406 } 2407 2408 /* 2409 * Ticks needed for sending a medium-sized packet. 2410 * Unfortunately, when we are configuring a WF2Q+ queue, we 2411 * do not have bandwidth information, because that is stored 2412 * in the parent pipe, and also we have multiple queues 2413 * competing for it. So we set step=0, which is not very 2414 * correct. But on the other hand, why do we want RED with 2415 * WF2Q+ ? 2416 */ 2417 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2418 step = 0; 2419 else 2420 step = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; 2421 2422 /* 2423 * max idle time (in ticks) before avg queue size becomes 0. 2424 * NOTA: (3/w_q) is approx the value x so that 2425 * (1-w_q)^x < 10^-3. 2426 */ 2427 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2428 idle = step * 3. / w_q; 2429 pipe.fs.lookup_step = (int)idle / lookup_depth; 2430 if (!pipe.fs.lookup_step) 2431 pipe.fs.lookup_step = 1; 2432 weight = 1 - w_q; 2433 for (t = pipe.fs.lookup_step; t > 0; --t) 2434 weight *= weight; 2435 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2436 } 2437 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2438 sizeof pipe); 2439 if (i) 2440 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2441 } 2442 2443 static void 2444 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2445 { 2446 int i, l; 2447 2448 for (i=0; i<6; i++) 2449 addr[i] = mask[i] = 0; 2450 if (!strcmp(p, "any")) 2451 return; 2452 2453 for (i=0; *p && i<6;i++, p++) { 2454 addr[i] = strtol(p, &p, 16); 2455 if (*p != ':') /* we start with the mask */ 2456 break; 2457 } 2458 if (*p == '/') { /* mask len */ 2459 l = strtol(p+1, &p, 0); 2460 for (i=0; l>0; l -=8, i++) 2461 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2462 } else if (*p == '&') { /* mask */ 2463 for (i=0, p++; *p && i<6;i++, p++) { 2464 mask[i] = strtol(p, &p, 16); 2465 if (*p != ':') 2466 break; 2467 } 2468 } else if (*p == '\0') { 2469 for (i=0; i<6; i++) 2470 mask[i] = 0xff; 2471 } 2472 for (i=0; i<6; i++) 2473 addr[i] &= mask[i]; 2474 } 2475 2476 /* 2477 * helper function, updates the pointer to cmd with the length 2478 * of the current command, and also cleans up the first word of 2479 * the new command in case it has been clobbered before. 2480 */ 2481 static ipfw_insn * 2482 next_cmd(ipfw_insn *cmd) 2483 { 2484 cmd += F_LEN(cmd); 2485 bzero(cmd, sizeof(*cmd)); 2486 return cmd; 2487 } 2488 2489 /* 2490 * A function to fill simple commands of size 1. 2491 * Existing flags are preserved. 2492 */ 2493 static void 2494 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2495 { 2496 cmd->opcode = opcode; 2497 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2498 cmd->arg1 = arg; 2499 } 2500 2501 /* 2502 * Fetch and add the MAC address and type, with masks. This generates one or 2503 * two microinstructions, and returns the pointer to the last one. 2504 */ 2505 static ipfw_insn * 2506 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2507 { 2508 ipfw_insn_mac *mac; 2509 2510 if (ac < 2) 2511 errx(EX_DATAERR, "MAC dst src"); 2512 2513 cmd->opcode = O_MACADDR2; 2514 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2515 2516 mac = (ipfw_insn_mac *)cmd; 2517 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2518 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2519 return cmd; 2520 } 2521 2522 static ipfw_insn * 2523 add_mactype(ipfw_insn *cmd, int ac, char *av) 2524 { 2525 if (ac < 1) 2526 errx(EX_DATAERR, "missing MAC type"); 2527 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2528 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2529 cmd->opcode = O_MAC_TYPE; 2530 return cmd; 2531 } else 2532 return NULL; 2533 } 2534 2535 static ipfw_insn * 2536 add_proto(ipfw_insn *cmd, char *av) 2537 { 2538 struct protoent *pe; 2539 u_char proto = 0; 2540 2541 if (!strncmp(av, "all", strlen(av))) 2542 ; /* same as "ip" */ 2543 else if ((proto = atoi(av)) > 0) 2544 ; /* all done! */ 2545 else if ((pe = getprotobyname(av)) != NULL) 2546 proto = pe->p_proto; 2547 else 2548 return NULL; 2549 if (proto != IPPROTO_IP) 2550 fill_cmd(cmd, O_PROTO, 0, proto); 2551 return cmd; 2552 } 2553 2554 static ipfw_insn * 2555 add_srcip(ipfw_insn *cmd, char *av) 2556 { 2557 fill_ip((ipfw_insn_ip *)cmd, av); 2558 if (cmd->opcode == O_IP_DST_SET) /* set */ 2559 cmd->opcode = O_IP_SRC_SET; 2560 else if (cmd->opcode == O_IP_DST_TABLE) /* table */ 2561 cmd->opcode = O_IP_SRC_TABLE; 2562 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */ 2563 cmd->opcode = O_IP_SRC_IFIP; 2564 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2565 cmd->opcode = O_IP_SRC_ME; 2566 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2567 cmd->opcode = O_IP_SRC; 2568 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2569 cmd->opcode = O_IP_SRC_MASK; 2570 return cmd; 2571 } 2572 2573 static ipfw_insn * 2574 add_dstip(ipfw_insn *cmd, char *av) 2575 { 2576 fill_ip((ipfw_insn_ip *)cmd, av); 2577 if (cmd->opcode == O_IP_DST_SET) /* set */ 2578 ; 2579 else if (cmd->opcode == O_IP_DST_TABLE) /* table */ 2580 ; 2581 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */ 2582 ; 2583 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2584 cmd->opcode = O_IP_DST_ME; 2585 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2586 cmd->opcode = O_IP_DST; 2587 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2588 cmd->opcode = O_IP_DST_MASK; 2589 return cmd; 2590 } 2591 2592 static ipfw_insn * 2593 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2594 { 2595 if (!strncmp(av, "any", strlen(av))) { 2596 return NULL; 2597 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2598 /* XXX todo: check that we have a protocol with ports */ 2599 cmd->opcode = opcode; 2600 return cmd; 2601 } 2602 return NULL; 2603 } 2604 2605 static void 2606 fill_rdr(ipfw_insn *cmd, char *av) 2607 { 2608 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd; 2609 char *p; 2610 2611 cmd->opcode = O_REDIRECT; 2612 cmd->len = F_INSN_SIZE(ipfw_insn_rdr); 2613 cmd->arg1 = 0; 2614 c->addr.s_addr = INADDR_ANY; 2615 c->port = 0; 2616 c->set = UINT16_MAX; 2617 2618 p = strchr(av, ','); 2619 if (p == NULL) 2620 p = strchr(av, ':'); 2621 if (p != NULL) 2622 *p = '\0'; 2623 lookup_host(av, &c->addr); 2624 2625 if (p != NULL && *(p + 1) != '\0') { 2626 char *ep; 2627 2628 c->port = strtoul(p + 1, &ep, 0); 2629 if (*ep != '\0') 2630 errx(EX_DATAERR, "illegal port %s", p + 1); 2631 c->port = htons(c->port); 2632 } 2633 } 2634 2635 /* 2636 * Parse arguments and assemble the microinstructions which make up a rule. 2637 * Rules are added into the 'rulebuf' and then copied in the correct order 2638 * into the actual rule. 2639 * 2640 * The syntax for a rule starts with the action, followed by an 2641 * optional log action, and the various match patterns. 2642 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2643 * (generated if the rule includes a keep-state option), then the 2644 * various match patterns, the "log" action, and the actual action. 2645 * 2646 */ 2647 static void 2648 add(int ac, char *av[]) 2649 { 2650 /* 2651 * rules are added into the 'rulebuf' and then copied in 2652 * the correct order into the actual rule. 2653 * Some things that need to go out of order (prob, action etc.) 2654 * go into actbuf[]. 2655 */ 2656 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX]; 2657 static uint32_t actbuf[IPFW_RULE_SIZE_MAX]; 2658 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX]; 2659 2660 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2661 ipfw_insn *first_cmd; /* first match pattern */ 2662 2663 struct ipfw_ioc_rule *rule; 2664 2665 /* 2666 * various flags used to record that we entered some fields. 2667 */ 2668 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2669 2670 int i; 2671 2672 int open_par = 0; /* open parenthesis ( */ 2673 2674 int has_dstport = 0; 2675 int has_recv = 0; 2676 2677 /* proto is here because it is used to fetch ports */ 2678 u_char proto = IPPROTO_IP; /* default protocol */ 2679 2680 double match_prob = 1; /* match probability, default is always match */ 2681 2682 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2683 bzero(cmdbuf, sizeof(cmdbuf)); 2684 bzero(rulebuf, sizeof(rulebuf)); 2685 2686 rule = (struct ipfw_ioc_rule *)rulebuf; 2687 cmd = (ipfw_insn *)cmdbuf; 2688 action = (ipfw_insn *)actbuf; 2689 2690 av++; ac--; 2691 2692 /* [rule N] -- Rule number optional */ 2693 if (ac && isdigit(**av)) { 2694 rule->rulenum = atoi(*av); 2695 av++; 2696 ac--; 2697 } 2698 2699 /* [set N] -- set number (0..30), optional */ 2700 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2701 int set = strtoul(av[1], NULL, 10); 2702 if (set < 0 || set > 30) 2703 errx(EX_DATAERR, "illegal set %s", av[1]); 2704 rule->set = set; 2705 av += 2; ac -= 2; 2706 } 2707 2708 /* [prob D] -- match probability, optional */ 2709 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2710 match_prob = strtod(av[1], NULL); 2711 2712 if (match_prob <= 0 || match_prob > 1) 2713 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2714 av += 2; ac -= 2; 2715 } 2716 2717 /* action -- mandatory */ 2718 NEED1("missing action"); 2719 i = match_token(rule_actions, *av); 2720 ac--; av++; 2721 action->len = 1; /* default */ 2722 switch(i) { 2723 case TOK_CHECKSTATE: 2724 have_state = action; 2725 action->opcode = O_CHECK_STATE; 2726 break; 2727 2728 case TOK_ACCEPT: 2729 action->opcode = O_ACCEPT; 2730 break; 2731 2732 case TOK_DEFRAG: 2733 action->opcode = O_DEFRAG; 2734 action->arg1 = 0; 2735 break; 2736 2737 case TOK_DENY: 2738 action->opcode = O_DENY; 2739 action->arg1 = 0; 2740 break; 2741 2742 case TOK_REJECT: 2743 action->opcode = O_REJECT; 2744 action->arg1 = ICMP_UNREACH_HOST; 2745 break; 2746 2747 case TOK_RESET: 2748 action->opcode = O_REJECT; 2749 action->arg1 = ICMP_REJECT_RST; 2750 break; 2751 2752 case TOK_UNREACH: 2753 action->opcode = O_REJECT; 2754 NEED1("missing reject code"); 2755 fill_reject_code(&action->arg1, *av); 2756 ac--; av++; 2757 break; 2758 2759 case TOK_COUNT: 2760 action->opcode = O_COUNT; 2761 break; 2762 2763 case TOK_QUEUE: 2764 case TOK_PIPE: 2765 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2766 case TOK_SKIPTO: 2767 if (i == TOK_QUEUE) 2768 action->opcode = O_QUEUE; 2769 else if (i == TOK_PIPE) 2770 action->opcode = O_PIPE; 2771 else if (i == TOK_SKIPTO) 2772 action->opcode = O_SKIPTO; 2773 NEED1("missing skipto/pipe/queue number"); 2774 action->arg1 = strtoul(*av, NULL, 10); 2775 av++; ac--; 2776 break; 2777 2778 case TOK_DIVERT: 2779 case TOK_TEE: 2780 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2781 NEED1("missing divert/tee port"); 2782 action->arg1 = strtoul(*av, NULL, 0); 2783 if (action->arg1 == 0) { 2784 struct servent *serv; 2785 setservent(1); 2786 serv = getservbyname(av[0], "divert"); 2787 if (serv != NULL) 2788 action->arg1 = ntohs(serv->s_port); 2789 else 2790 errx(EX_DATAERR, "illegal divert/tee port"); 2791 } 2792 ac--; av++; 2793 break; 2794 2795 case TOK_FORWARD: { 2796 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2797 char *st, *end; 2798 2799 NEED1("missing forward address[:port]"); 2800 2801 action->opcode = O_FORWARD_IP; 2802 action->len = F_INSN_SIZE(ipfw_insn_sa); 2803 2804 p->sa.sin_len = sizeof(struct sockaddr_in); 2805 p->sa.sin_family = AF_INET; 2806 p->sa.sin_port = 0; 2807 /* 2808 * locate the address-port separator (':' or ',') 2809 */ 2810 st = strchr(*av, ':'); 2811 if (st == NULL) 2812 st = strchr(*av, ','); 2813 if (st != NULL) { 2814 *(st++) = '\0'; 2815 i = strtoport(st, &end, 0 /* base */, 0 /* proto */); 2816 if (st == end) 2817 errx(EX_DATAERR, 2818 "illegal forwarding port ``%s''", st); 2819 p->sa.sin_port = (u_short)i; 2820 } 2821 lookup_host(*av, &(p->sa.sin_addr)); 2822 } 2823 ac--; av++; 2824 break; 2825 2826 default: 2827 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2828 } 2829 action = next_cmd(action); 2830 2831 /* 2832 * [log [logamount N]] -- log, optional 2833 * 2834 * If exists, it goes first in the cmdbuf, but then it is 2835 * skipped in the copy section to the end of the buffer. 2836 */ 2837 if (ac && !strncmp(*av, "log", strlen(*av))) { 2838 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2839 2840 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2841 cmd->opcode = O_LOG; 2842 av++; ac--; 2843 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2844 ac--; av++; 2845 NEED1("logamount requires argument"); 2846 c->max_log = atoi(*av); 2847 ac--; av++; 2848 } 2849 cmd = next_cmd(cmd); 2850 } 2851 2852 if (have_state) /* must be a check-state, we are done */ 2853 goto done; 2854 2855 #define OR_START(target) \ 2856 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2857 if (open_par) \ 2858 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2859 prev = NULL; \ 2860 open_par = 1; \ 2861 if ( (av[0])[1] == '\0') { \ 2862 ac--; av++; \ 2863 } else \ 2864 (*av)++; \ 2865 } \ 2866 target: \ 2867 2868 2869 #define CLOSE_PAR \ 2870 if (open_par) { \ 2871 if (ac && ( \ 2872 !strncmp(*av, ")", strlen(*av)) || \ 2873 !strncmp(*av, "}", strlen(*av)) )) { \ 2874 prev = NULL; \ 2875 open_par = 0; \ 2876 ac--; av++; \ 2877 } else \ 2878 errx(EX_USAGE, "missing \")\"\n"); \ 2879 } 2880 2881 #define NOT_BLOCK \ 2882 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2883 if (cmd->len & F_NOT) \ 2884 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2885 cmd->len |= F_NOT; \ 2886 ac--; av++; \ 2887 } 2888 2889 #define OR_BLOCK(target) \ 2890 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2891 if (prev == NULL || open_par == 0) \ 2892 errx(EX_DATAERR, "invalid OR block"); \ 2893 prev->len |= F_OR; \ 2894 ac--; av++; \ 2895 goto target; \ 2896 } \ 2897 CLOSE_PAR; 2898 2899 first_cmd = cmd; 2900 2901 #if 0 2902 /* 2903 * MAC addresses, optional. 2904 * If we have this, we skip the part "proto from src to dst" 2905 * and jump straight to the option parsing. 2906 */ 2907 NOT_BLOCK; 2908 NEED1("missing protocol"); 2909 if (!strncmp(*av, "MAC", strlen(*av)) || 2910 !strncmp(*av, "mac", strlen(*av))) { 2911 ac--; av++; /* the "MAC" keyword */ 2912 add_mac(cmd, ac, av); /* exits in case of errors */ 2913 cmd = next_cmd(cmd); 2914 ac -= 2; av += 2; /* dst-mac and src-mac */ 2915 NOT_BLOCK; 2916 NEED1("missing mac type"); 2917 if (add_mactype(cmd, ac, av[0])) 2918 cmd = next_cmd(cmd); 2919 ac--; av++; /* any or mac-type */ 2920 goto read_options; 2921 } 2922 #endif 2923 2924 /* 2925 * protocol, mandatory 2926 */ 2927 OR_START(get_proto); 2928 NOT_BLOCK; 2929 NEED1("missing protocol"); 2930 if (add_proto(cmd, *av)) { 2931 av++; ac--; 2932 if (F_LEN(cmd) == 0) /* plain IP */ 2933 proto = 0; 2934 else { 2935 proto = cmd->arg1; 2936 prev = cmd; 2937 cmd = next_cmd(cmd); 2938 } 2939 } else if (first_cmd != cmd) { 2940 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2941 } else 2942 goto read_options; 2943 OR_BLOCK(get_proto); 2944 2945 /* 2946 * "from", mandatory 2947 */ 2948 if (!ac || strncmp(*av, "from", strlen(*av))) 2949 errx(EX_USAGE, "missing ``from''"); 2950 ac--; av++; 2951 2952 /* 2953 * source IP, mandatory 2954 */ 2955 OR_START(source_ip); 2956 NOT_BLOCK; /* optional "not" */ 2957 NEED1("missing source address"); 2958 if (add_srcip(cmd, *av)) { 2959 ac--; av++; 2960 if (F_LEN(cmd) != 0) { /* ! any */ 2961 prev = cmd; 2962 cmd = next_cmd(cmd); 2963 } 2964 } 2965 OR_BLOCK(source_ip); 2966 2967 /* 2968 * source ports, optional 2969 */ 2970 NOT_BLOCK; /* optional "not" */ 2971 if (ac) { 2972 if (!strncmp(*av, "any", strlen(*av)) || 2973 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2974 ac--; av++; 2975 if (F_LEN(cmd) != 0) 2976 cmd = next_cmd(cmd); 2977 } 2978 } 2979 2980 /* 2981 * "to", mandatory 2982 */ 2983 if (!ac || strncmp(*av, "to", strlen(*av))) 2984 errx(EX_USAGE, "missing ``to''"); 2985 av++; ac--; 2986 2987 /* 2988 * destination, mandatory 2989 */ 2990 OR_START(dest_ip); 2991 NOT_BLOCK; /* optional "not" */ 2992 NEED1("missing dst address"); 2993 if (add_dstip(cmd, *av)) { 2994 ac--; av++; 2995 if (F_LEN(cmd) != 0) { /* ! any */ 2996 prev = cmd; 2997 cmd = next_cmd(cmd); 2998 } 2999 } 3000 OR_BLOCK(dest_ip); 3001 3002 /* 3003 * dest. ports, optional 3004 */ 3005 NOT_BLOCK; /* optional "not" */ 3006 if (ac) { 3007 if (!strncmp(*av, "any", strlen(*av)) || 3008 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3009 ac--; av++; 3010 if (F_LEN(cmd) != 0) { 3011 has_dstport = 1; 3012 cmd = next_cmd(cmd); 3013 } 3014 } 3015 } 3016 3017 read_options: 3018 if (ac && first_cmd == cmd) { 3019 /* 3020 * nothing specified so far, store in the rule to ease 3021 * printout later. 3022 */ 3023 rule->usr_flags = IPFW_USR_F_NORULE; 3024 } 3025 prev = NULL; 3026 while (ac) { 3027 char *s1; 3028 ipfw_insn_u32 *cmd32; /* alias for cmd */ 3029 3030 s1 = *av; 3031 cmd32 = (ipfw_insn_u32 *)cmd; 3032 3033 if (*s1 == '!') { /* alternate syntax for NOT */ 3034 if (cmd->len & F_NOT) 3035 errx(EX_USAGE, "double \"not\" not allowed\n"); 3036 cmd->len = F_NOT; 3037 s1++; 3038 } 3039 i = match_token(rule_options, s1); 3040 ac--; av++; 3041 switch(i) { 3042 case TOK_NOT: 3043 if (cmd->len & F_NOT) 3044 errx(EX_USAGE, "double \"not\" not allowed\n"); 3045 cmd->len = F_NOT; 3046 break; 3047 3048 case TOK_OR: 3049 if (open_par == 0 || prev == NULL) 3050 errx(EX_USAGE, "invalid \"or\" block\n"); 3051 prev->len |= F_OR; 3052 break; 3053 3054 case TOK_STARTBRACE: 3055 if (open_par) 3056 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 3057 open_par = 1; 3058 break; 3059 3060 case TOK_ENDBRACE: 3061 if (!open_par) 3062 errx(EX_USAGE, "+missing \")\"\n"); 3063 open_par = 0; 3064 prev = NULL; 3065 break; 3066 3067 case TOK_IN: 3068 fill_cmd(cmd, O_IN, 0, 0); 3069 break; 3070 3071 case TOK_OUT: 3072 cmd->len ^= F_NOT; /* toggle F_NOT */ 3073 fill_cmd(cmd, O_IN, 0, 0); 3074 break; 3075 3076 case TOK_FRAG: 3077 fill_cmd(cmd, O_FRAG, 0, 0); 3078 break; 3079 3080 case TOK_IPFRAG: 3081 fill_cmd(cmd, O_IPFRAG, 0, 0); 3082 break; 3083 3084 case TOK_LAYER2: 3085 fill_cmd(cmd, O_LAYER2, 0, 0); 3086 break; 3087 3088 case TOK_XMIT: 3089 case TOK_RECV: 3090 case TOK_VIA: 3091 NEED1("recv, xmit, via require interface name" 3092 " or address"); 3093 fill_iface((ipfw_insn_if *)cmd, av[0]); 3094 ac--; av++; 3095 if (F_LEN(cmd) == 0) /* not a valid address */ 3096 break; 3097 if (i == TOK_XMIT) 3098 cmd->opcode = O_XMIT; 3099 else if (i == TOK_RECV) { 3100 cmd->opcode = O_RECV; 3101 has_recv = 1; 3102 } else if (i == TOK_VIA) 3103 cmd->opcode = O_VIA; 3104 break; 3105 3106 case TOK_ICMPTYPES: 3107 NEED1("icmptypes requires list of types"); 3108 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 3109 av++; ac--; 3110 break; 3111 3112 case TOK_IPTTL: 3113 NEED1("ipttl requires TTL"); 3114 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3115 ac--; av++; 3116 break; 3117 3118 case TOK_IPID: 3119 NEED1("ipid requires length"); 3120 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3121 ac--; av++; 3122 break; 3123 3124 case TOK_IPLEN: 3125 NEED1("iplen requires length"); 3126 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3127 ac--; av++; 3128 break; 3129 3130 case TOK_IPVER: 3131 NEED1("ipver requires version"); 3132 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3133 ac--; av++; 3134 break; 3135 3136 case TOK_IPPRECEDENCE: 3137 NEED1("ipprecedence requires value"); 3138 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3139 (strtoul(*av, NULL, 0) & 7) << 5); 3140 ac--; av++; 3141 break; 3142 3143 case TOK_IPOPTS: 3144 NEED1("missing argument for ipoptions"); 3145 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3146 ac--; av++; 3147 break; 3148 3149 case TOK_IPTOS: 3150 NEED1("missing argument for iptos"); 3151 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3152 ac--; av++; 3153 break; 3154 3155 case TOK_UID: 3156 NEED1("uid requires argument"); 3157 { 3158 char *end; 3159 uid_t uid; 3160 struct passwd *pwd; 3161 3162 cmd->opcode = O_UID; 3163 uid = strtoul(*av, &end, 0); 3164 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3165 if (pwd == NULL) 3166 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3167 cmd32->d[0] = pwd->pw_uid; 3168 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3169 ac--; av++; 3170 } 3171 break; 3172 3173 case TOK_GID: 3174 NEED1("gid requires argument"); 3175 { 3176 char *end; 3177 gid_t gid; 3178 struct group *grp; 3179 3180 cmd->opcode = O_GID; 3181 gid = strtoul(*av, &end, 0); 3182 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3183 if (grp == NULL) 3184 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3185 cmd32->d[0] = grp->gr_gid; 3186 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3187 ac--; av++; 3188 } 3189 break; 3190 3191 case TOK_ESTAB: 3192 fill_cmd(cmd, O_ESTAB, 0, 0); 3193 break; 3194 3195 case TOK_SETUP: 3196 fill_cmd(cmd, O_TCPFLAGS, 0, 3197 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3198 break; 3199 3200 case TOK_TCPOPTS: 3201 NEED1("missing argument for tcpoptions"); 3202 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3203 ac--; av++; 3204 break; 3205 3206 case TOK_TCPSEQ: 3207 case TOK_TCPACK: 3208 NEED1("tcpseq/tcpack requires argument"); 3209 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3210 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3211 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3212 ac--; av++; 3213 break; 3214 3215 case TOK_TCPWIN: 3216 NEED1("tcpwin requires length"); 3217 fill_cmd(cmd, O_TCPWIN, 0, 3218 htons(strtoul(*av, NULL, 0))); 3219 ac--; av++; 3220 break; 3221 3222 case TOK_TCPFLAGS: 3223 NEED1("missing argument for tcpflags"); 3224 cmd->opcode = O_TCPFLAGS; 3225 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3226 ac--; av++; 3227 break; 3228 3229 case TOK_REDIRECT: 3230 if (open_par) 3231 errx(EX_USAGE, "rdr cannot be part " 3232 "of an or block"); 3233 if (have_state) { 3234 errx(EX_USAGE, "only one of rdr, keep-state " 3235 "and limit is allowed"); 3236 } 3237 have_state = cmd; 3238 NEED1("rdr needs address and port"); 3239 fill_rdr(cmd, *av); 3240 ac--; av++; 3241 break; 3242 3243 case TOK_KEEPSTATE: 3244 if (open_par) 3245 errx(EX_USAGE, "keep-state cannot be part " 3246 "of an or block"); 3247 if (have_state) { 3248 errx(EX_USAGE, "only one of rdr, keep-state " 3249 "and limit is allowed"); 3250 } 3251 have_state = cmd; 3252 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3253 break; 3254 3255 case TOK_LIMIT: 3256 if (open_par) 3257 errx(EX_USAGE, "limit cannot be part " 3258 "of an or block"); 3259 if (have_state) { 3260 errx(EX_USAGE, "only one of rdr, keep-state " 3261 "and limit is allowed"); 3262 } 3263 NEED1("limit needs mask and # of connections"); 3264 have_state = cmd; 3265 { 3266 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3267 3268 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3269 cmd->opcode = O_LIMIT; 3270 c->limit_mask = 0; 3271 c->conn_limit = 0; 3272 for (; ac >1 ;) { 3273 int val; 3274 3275 val = match_token(limit_masks, *av); 3276 if (val <= 0) 3277 break; 3278 c->limit_mask |= val; 3279 ac--; av++; 3280 } 3281 c->conn_limit = atoi(*av); 3282 if (c->conn_limit == 0) 3283 errx(EX_USAGE, "limit: limit must be >0"); 3284 if (c->limit_mask == 0) 3285 errx(EX_USAGE, "missing limit mask"); 3286 ac--; av++; 3287 } 3288 break; 3289 3290 case TOK_PROTO: 3291 NEED1("missing protocol"); 3292 if (add_proto(cmd, *av)) { 3293 proto = cmd->arg1; 3294 ac--; av++; 3295 } else 3296 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3297 break; 3298 3299 case TOK_SRCIP: 3300 NEED1("missing source IP"); 3301 if (add_srcip(cmd, *av)) { 3302 ac--; av++; 3303 } 3304 break; 3305 3306 case TOK_DSTIP: 3307 NEED1("missing destination IP"); 3308 if (add_dstip(cmd, *av)) { 3309 ac--; av++; 3310 } 3311 break; 3312 3313 case TOK_SRCPORT: 3314 NEED1("missing source port"); 3315 if (!strncmp(*av, "any", strlen(*av)) || 3316 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3317 ac--; av++; 3318 } else 3319 errx(EX_DATAERR, "invalid source port %s", *av); 3320 break; 3321 3322 case TOK_DSTPORT: 3323 NEED1("missing destination port"); 3324 if (!strncmp(*av, "any", strlen(*av)) || 3325 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3326 if (F_LEN(cmd) != 0) 3327 has_dstport =1; 3328 ac--; av++; 3329 } else 3330 errx(EX_DATAERR, "invalid destination port %s", 3331 *av); 3332 break; 3333 3334 case TOK_MAC: 3335 if (ac < 2) 3336 errx(EX_USAGE, "MAC dst-mac src-mac"); 3337 if (add_mac(cmd, ac, av)) { 3338 ac -= 2; av += 2; 3339 } 3340 break; 3341 3342 case TOK_MACTYPE: 3343 NEED1("missing mac type"); 3344 if (!add_mactype(cmd, ac, *av)) 3345 errx(EX_DATAERR, "invalid mac type %s", *av); 3346 ac--; av++; 3347 break; 3348 3349 default: 3350 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s1); 3351 } 3352 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3353 prev = cmd; 3354 cmd = next_cmd(cmd); 3355 } 3356 } 3357 3358 done: 3359 /* 3360 * Now copy stuff into the rule. 3361 * If we have a keep-state option, the first instruction 3362 * must be a PROBE_STATE (which is generated here). 3363 * If we have a LOG option, it was stored as the first command, 3364 * and now must be moved to the top of the action part. 3365 */ 3366 dst = (ipfw_insn *)rule->cmd; 3367 3368 /* 3369 * First thing to write into the command stream is the match probability. 3370 */ 3371 if (match_prob != 1) { /* 1 means always match */ 3372 dst->opcode = O_PROB; 3373 dst->len = 2; 3374 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3375 dst += dst->len; 3376 } 3377 3378 /* 3379 * generate O_PROBE_STATE if necessary 3380 */ 3381 if (have_state && have_state->opcode != O_CHECK_STATE) { 3382 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3383 dst = next_cmd(dst); 3384 } 3385 /* 3386 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_REDIRECT 3387 */ 3388 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3389 i = F_LEN(src); 3390 3391 switch (src->opcode) { 3392 case O_LOG: 3393 case O_KEEP_STATE: 3394 case O_LIMIT: 3395 case O_REDIRECT: 3396 break; 3397 default: 3398 bcopy(src, dst, i * sizeof(u_int32_t)); 3399 dst += i; 3400 } 3401 } 3402 3403 /* 3404 * put back the have_state command as last opcode 3405 */ 3406 if (have_state && have_state->opcode != O_CHECK_STATE) { 3407 i = F_LEN(have_state); 3408 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3409 dst += i; 3410 3411 if (have_state->opcode == O_REDIRECT && 3412 (!has_dstport || !has_recv)) 3413 errx(EX_USAGE, "missing \'dst-port\' or \'recv\'"); 3414 } 3415 /* 3416 * start action section 3417 */ 3418 rule->act_ofs = dst - rule->cmd; 3419 3420 /* 3421 * put back O_LOG if necessary 3422 */ 3423 src = (ipfw_insn *)cmdbuf; 3424 if ( src->opcode == O_LOG ) { 3425 i = F_LEN(src); 3426 bcopy(src, dst, i * sizeof(u_int32_t)); 3427 dst += i; 3428 } 3429 /* 3430 * copy all other actions 3431 */ 3432 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3433 i = F_LEN(src); 3434 bcopy(src, dst, i * sizeof(u_int32_t)); 3435 dst += i; 3436 } 3437 3438 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3439 i = (uint8_t *)dst - (uint8_t *)rule; 3440 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3441 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3442 if (!do_quiet) 3443 show_ipfw(rule, 10, 10); 3444 } 3445 3446 static void 3447 zero(int ac, char *av[]) 3448 { 3449 int rulenum; 3450 int failed = EX_OK; 3451 3452 av++; ac--; 3453 3454 if (!ac) { 3455 /* clear all entries */ 3456 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3457 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3458 if (!do_quiet) 3459 printf("Accounting cleared.\n"); 3460 3461 return; 3462 } 3463 3464 while (ac) { 3465 /* Rule number */ 3466 if (isdigit(**av)) { 3467 rulenum = atoi(*av); 3468 av++; 3469 ac--; 3470 if (setsockopt(s, IPPROTO_IP, 3471 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3472 warn("rule %u: setsockopt(IP_FW_ZERO)", 3473 rulenum); 3474 failed = EX_UNAVAILABLE; 3475 } else if (!do_quiet) 3476 printf("Entry %d cleared\n", rulenum); 3477 } else { 3478 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3479 } 3480 } 3481 if (failed != EX_OK) 3482 exit(failed); 3483 } 3484 3485 static void 3486 resetlog(int ac, char *av[]) 3487 { 3488 int rulenum; 3489 int failed = EX_OK; 3490 3491 av++; ac--; 3492 3493 if (!ac) { 3494 /* clear all entries */ 3495 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3496 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3497 if (!do_quiet) 3498 printf("Logging counts reset.\n"); 3499 3500 return; 3501 } 3502 3503 while (ac) { 3504 /* Rule number */ 3505 if (isdigit(**av)) { 3506 rulenum = atoi(*av); 3507 av++; 3508 ac--; 3509 if (setsockopt(s, IPPROTO_IP, 3510 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3511 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3512 rulenum); 3513 failed = EX_UNAVAILABLE; 3514 } else if (!do_quiet) 3515 printf("Entry %d logging count reset\n", 3516 rulenum); 3517 } else { 3518 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3519 } 3520 } 3521 if (failed != EX_OK) 3522 exit(failed); 3523 } 3524 3525 static void 3526 flush(void) 3527 { 3528 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3529 3530 if (!do_force && !do_quiet) { /* need to ask user */ 3531 int c; 3532 3533 printf("Are you sure? [yn] "); 3534 fflush(stdout); 3535 do { 3536 c = toupper(getc(stdin)); 3537 while (c != '\n' && getc(stdin) != '\n') 3538 if (feof(stdin)) 3539 return; /* and do not flush */ 3540 } while (c != 'Y' && c != 'N'); 3541 printf("\n"); 3542 if (c == 'N') /* user said no */ 3543 return; 3544 } 3545 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3546 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3547 do_pipe ? "DUMMYNET" : "FW"); 3548 if (!do_quiet) 3549 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3550 } 3551 3552 static void 3553 table_create(int ac, char **av) 3554 { 3555 struct ipfw_ioc_table tbl; 3556 char *eptr; 3557 3558 ac--; 3559 av++; 3560 3561 if (ac == 0) 3562 errx(EX_DATAERR, "missing table id"); 3563 3564 memset(&tbl, 0, sizeof(tbl)); 3565 tbl.tableid = strtoul(*av, &eptr, 0); 3566 if (*eptr != '\0') 3567 errx(EX_DATAERR, "invalid table id %s", *av); 3568 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_CREATE, &tbl, sizeof(tbl)) < 0) 3569 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_CREATE)"); 3570 if (!do_quiet) 3571 printf("Created table %d\n", tbl.tableid); 3572 } 3573 3574 static void 3575 table_flush(int ac, char **av, int opt) 3576 { 3577 struct ipfw_ioc_table tbl; 3578 char *eptr; 3579 3580 ac--; 3581 av++; 3582 3583 memset(&tbl, 0, sizeof(tbl)); 3584 3585 if (ac == 0) { 3586 if (opt == IP_FW_TBL_FLUSH) { 3587 /* Flush all tables */ 3588 tbl.tableid = -1; 3589 goto flush; 3590 } 3591 errx(EX_DATAERR, "missing table id"); 3592 } 3593 3594 tbl.tableid = strtoul(*av, &eptr, 0); 3595 if (*eptr != '\0') 3596 errx(EX_DATAERR, "invalid table id %s", *av); 3597 3598 flush: 3599 if (!do_force && !do_quiet) { /* need to ask user */ 3600 int c; 3601 3602 printf("Are you sure? [yn] "); 3603 fflush(stdout); 3604 do { 3605 c = toupper(getc(stdin)); 3606 while (c != '\n' && getc(stdin) != '\n') 3607 if (feof(stdin)) 3608 return; /* and do not flush */ 3609 } while (c != 'Y' && c != 'N'); 3610 printf("\n"); 3611 if (c == 'N') /* user said no */ 3612 return; 3613 } 3614 3615 if (setsockopt(s, IPPROTO_IP, opt, &tbl, sizeof(tbl)) < 0) { 3616 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)", 3617 opt == IP_FW_TBL_FLUSH ? "FLUSH" : "DESTROY"); 3618 } 3619 if (!do_quiet) { 3620 if (tbl.tableid >= 0) { 3621 printf("%sed table %d\n", 3622 opt == IP_FW_TBL_FLUSH ? "Flush" : "Destroy", 3623 tbl.tableid); 3624 } else { 3625 printf("Flushed all tables\n"); 3626 } 3627 } 3628 } 3629 3630 static void 3631 table_list(void) 3632 { 3633 struct ipfw_ioc_tbllist *list; 3634 int table_max, i; 3635 size_t len; 3636 socklen_t len1; 3637 3638 len = sizeof(table_max); 3639 if (sysctlbyname("net.inet.ip.fw.table_max", &table_max, &len, 3640 NULL, 0) < 0) 3641 err(EX_UNAVAILABLE, "sysctl net.inet.ip.fw.table_max failed"); 3642 3643 len1 = __offsetof(struct ipfw_ioc_tbllist, tables[table_max]); 3644 list = malloc(len1); 3645 list->tableid = -1; 3646 3647 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, list, &len1) < 0) 3648 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)"); 3649 3650 for (i = 0; i < list->tablecnt; ++i) 3651 printf("%u\n", list->tables[i]); 3652 } 3653 3654 /* XXX copied from route(8) */ 3655 static void 3656 inet_makenetandmask(in_addr_t net, struct sockaddr_in *in, 3657 struct sockaddr_in *in_mask, int bits) 3658 { 3659 in_addr_t addr, mask = 0; 3660 char *cp; 3661 3662 /* 3663 * XXX: This approach unable to handle 0.0.0.1/32 correctly 3664 * as inet_network() converts 0.0.0.1 and 1 equally. 3665 */ 3666 if (net <= 0xff) 3667 addr = net << IN_CLASSA_NSHIFT; 3668 else if (net <= 0xffff) 3669 addr = net << IN_CLASSB_NSHIFT; 3670 else if (net <= 0xffffff) 3671 addr = net << IN_CLASSC_NSHIFT; 3672 else 3673 addr = net; 3674 3675 if (bits != 0) 3676 mask = 0xffffffff << (32 - bits); 3677 else if (net == 0) 3678 mask = 0; 3679 else if (IN_CLASSA(addr)) 3680 mask = IN_CLASSA_NET; 3681 else if (IN_CLASSB(addr)) 3682 mask = IN_CLASSB_NET; 3683 else if (IN_CLASSC(addr)) 3684 mask = IN_CLASSC_NET; 3685 else if (IN_MULTICAST(addr)) 3686 mask = IN_CLASSD_NET; 3687 else 3688 mask = 0xffffffff; 3689 3690 in->sin_family = AF_INET; 3691 in->sin_len = sizeof(struct sockaddr_in); 3692 in->sin_addr.s_addr = htonl(addr); 3693 3694 if (mask != 0xffffffff) { 3695 in_mask->sin_addr.s_addr = htonl(mask); 3696 cp = (char *)(&in_mask->sin_addr + 1); 3697 while (*--cp == 0 && cp > (char *)in_mask) 3698 ; 3699 in_mask->sin_len = 1 + cp - (char *)in_mask; 3700 } 3701 } 3702 3703 static void 3704 table_alt(int ac, char **av, int opt) 3705 { 3706 struct ipfw_ioc_tblcont ent; 3707 struct ipfw_ioc_tblent *te; 3708 char *eptr; 3709 3710 --ac; 3711 ++av; 3712 if (ac == 0) 3713 errx(EX_DATAERR, "missing table id"); 3714 3715 memset(&ent, 0, sizeof(ent)); 3716 ent.tableid = strtoul(*av, &eptr, 0); 3717 ent.entcnt = 1; 3718 te = &ent.ent[0]; 3719 if (*eptr != '\0') 3720 errx(EX_DATAERR, "invalid table id %s", *av); 3721 3722 --ac; 3723 ++av; 3724 if (ac == 0) 3725 errx(EX_DATAERR, "missing addresses"); 3726 3727 while (ac > 0) { 3728 char *q; 3729 3730 q = strchr(*av, '/'); 3731 if (q != NULL) { 3732 in_addr_t val; 3733 int bits; 3734 3735 *q = '\0'; 3736 val = inet_network(*av); 3737 *q = '/'; 3738 if (val == INADDR_NONE) { 3739 fflush(stdout); 3740 errx(EX_DATAERR, "invalid address %s", *av); 3741 } 3742 3743 bits = strtoul(q + 1, &eptr, 0); 3744 if (*eptr != '\0') { 3745 fflush(stdout); 3746 errx(EX_DATAERR, "invalid address %s", *av); 3747 } 3748 inet_makenetandmask(val, &te->key, &te->netmask, bits); 3749 } else { 3750 int n; 3751 3752 n = inet_pton(AF_INET, *av, &te->key.sin_addr); 3753 if (n == 0) { 3754 fflush(stdout); 3755 errx(EX_DATAERR, "invalid address %s", *av); 3756 } else if (n < 0) { 3757 fflush(stdout); 3758 err(EX_UNAVAILABLE, "inet_pton failed"); 3759 } 3760 te->key.sin_family = AF_INET; 3761 te->key.sin_len = sizeof(struct sockaddr_in); 3762 } 3763 3764 if (setsockopt(s, IPPROTO_IP, opt, &ent, sizeof(ent)) < 0) { 3765 if (opt == IP_FW_TBL_ADD && errno == EEXIST) { 3766 printf("Failed to add %s to table %d\n", 3767 *av, ent.tableid); 3768 } else if (opt == IP_FW_TBL_DEL && errno == ESRCH) { 3769 printf("Failed to delete %s from table %d\n", 3770 *av, ent.tableid); 3771 } else { 3772 fflush(stdout); 3773 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)", 3774 opt == IP_FW_TBL_ADD ? "ADD" : "DEL"); 3775 } 3776 } else if (!do_quiet) { 3777 printf("%sed %s %s table %d\n", 3778 opt == IP_FW_TBL_ADD ? "Add" : "Delet", *av, 3779 opt == IP_FW_TBL_ADD ? "to" : "from", ent.tableid); 3780 } 3781 3782 --ac; 3783 ++av; 3784 } 3785 } 3786 3787 static void 3788 table_show(int ac, char **av) 3789 { 3790 struct ipfw_ioc_tblcont *cont = NULL; 3791 int tableid, count = 128, i, uwidth = 0, lwidth = 0; 3792 char *eptr; 3793 3794 --ac; 3795 ++av; 3796 if (ac == 0) 3797 errx(EX_DATAERR, "missing table id"); 3798 3799 tableid = strtoul(*av, &eptr, 0); 3800 if (*eptr != '\0') 3801 errx(EX_DATAERR, "invalid table id %s", *av); 3802 3803 for (;;) { 3804 socklen_t len; 3805 3806 len = __offsetof(struct ipfw_ioc_tblcont, ent[count]); 3807 cont = reallocf(cont, len); 3808 cont->tableid = tableid; 3809 3810 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, cont, &len) < 0) { 3811 if (errno == E2BIG) { 3812 count *= 2; 3813 continue; 3814 } 3815 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)"); 3816 } 3817 break; 3818 } 3819 if (cont->entcnt == 0) 3820 return; 3821 3822 if (do_acct) { 3823 for (i = 0; i < cont->entcnt; ++i) { 3824 int width; 3825 3826 width = snprintf(NULL, 0, "%ju", 3827 (uintmax_t)cont->ent[i].use); 3828 if (width > uwidth) 3829 uwidth = width; 3830 } 3831 } 3832 3833 for (i = 0; i < cont->entcnt; ++i) { 3834 const struct ipfw_ioc_tblent *te = &cont->ent[i]; 3835 char addr[INET_ADDRSTRLEN]; 3836 3837 if (do_acct) 3838 printf("%*ju ", uwidth, (uintmax_t)te->use); 3839 if (do_time) { 3840 char timestr[30]; 3841 3842 if (lwidth == 0) { 3843 time_t t0 = 0; 3844 3845 strcpy(timestr, ctime(&t0)); 3846 *strchr(timestr, '\n') = '\0'; 3847 lwidth = strlen(timestr); 3848 } 3849 if (te->last_used) { 3850 time_t t = _long_to_time(te->last_used); 3851 3852 strcpy(timestr, ctime(&t)); 3853 *strchr(timestr, '\n') = '\0'; 3854 printf("%s ", timestr); 3855 } else { 3856 printf("%*s ", lwidth, " "); 3857 } 3858 } 3859 3860 if (te->netmask.sin_len == 0) { 3861 printf("%s\n", inet_ntop(AF_INET, 3862 &te->key.sin_addr, addr, sizeof(addr))); 3863 } else { 3864 struct sockaddr_in mask; 3865 int b; 3866 3867 memset(&mask, 0, sizeof(mask)); 3868 memcpy(&mask, &te->netmask, 3869 te->netmask.sin_len); 3870 b = ffs(ntohl(te->netmask.sin_addr.s_addr)); 3871 b = 32 - (b - 1); 3872 3873 printf("%s/%d\n", inet_ntop(AF_INET, 3874 &te->key.sin_addr, addr, sizeof(addr)), b); 3875 } 3876 } 3877 } 3878 3879 static void 3880 table_zero(int ac, char **av) 3881 { 3882 struct ipfw_ioc_table tbl; 3883 3884 --ac; 3885 ++av; 3886 3887 memset(&tbl, 0, sizeof(tbl)); 3888 if (ac == 0) { 3889 tbl.tableid = -1; 3890 } else { 3891 char *eptr; 3892 3893 tbl.tableid = strtoul(*av, &eptr, 0); 3894 if (*eptr != '\0') 3895 errx(EX_DATAERR, "invalid table id %s", *av); 3896 } 3897 3898 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_ZERO, &tbl, sizeof(tbl)) < 0) 3899 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_ZERO)"); 3900 if (!do_quiet) 3901 printf("Accounting cleared\n"); 3902 } 3903 3904 static void 3905 table_expire(int ac, char **av) 3906 { 3907 struct ipfw_ioc_tblexp tbl; 3908 char *eptr; 3909 socklen_t len; 3910 3911 --ac; 3912 ++av; 3913 3914 memset(&tbl, 0, sizeof(tbl)); 3915 if (ac == 0) { 3916 errx(EX_DATAERR, "missing expire time"); 3917 } else if (ac == 1) { 3918 tbl.tableid = -1; 3919 } else { 3920 tbl.tableid = strtoul(*av, &eptr, 0); 3921 if (*eptr != '\0') 3922 errx(EX_DATAERR, "invalid table id %s", *av); 3923 --ac; 3924 ++av; 3925 } 3926 3927 tbl.expire = strtoul(*av, &eptr, 0); 3928 if (*eptr != '\0') 3929 errx(EX_DATAERR, "invalid expire timeout %s", *av); 3930 3931 if (!do_force && !do_quiet) { /* need to ask user */ 3932 int c; 3933 3934 printf("Are you sure? [yn] "); 3935 fflush(stdout); 3936 do { 3937 c = toupper(getc(stdin)); 3938 while (c != '\n' && getc(stdin) != '\n') 3939 if (feof(stdin)) 3940 return; /* and do not flush */ 3941 } while (c != 'Y' && c != 'N'); 3942 printf("\n"); 3943 if (c == 'N') /* user said no */ 3944 return; 3945 } 3946 3947 len = sizeof(tbl); 3948 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_EXPIRE, &tbl, &len) < 0) 3949 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_EXPIRE)"); 3950 if (!do_quiet) { 3951 printf("Expired %d address%s\n", tbl.expcnt, 3952 (tbl.expcnt == 0 || tbl.expcnt > 1) ? "es" : ""); 3953 } 3954 } 3955 3956 static int 3957 ipfw_main(int ac, char **av) 3958 { 3959 int ch; 3960 3961 if (ac == 1) 3962 show_usage(); 3963 3964 /* Set the force flag for non-interactive processes */ 3965 do_force = !isatty(STDIN_FILENO); 3966 3967 optind = optreset = 1; 3968 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3969 switch (ch) { 3970 case 'h': /* help */ 3971 help(); 3972 break; /* NOTREACHED */ 3973 3974 case 's': /* sort */ 3975 do_sort = atoi(optarg); 3976 break; 3977 case 'a': 3978 do_acct = 1; 3979 break; 3980 case 'c': 3981 do_compact = 1; 3982 break; 3983 case 'd': 3984 do_dynamic = 1; 3985 break; 3986 case 'e': 3987 do_expired = 1; 3988 break; 3989 case 'f': 3990 do_force = 1; 3991 break; 3992 case 'N': 3993 do_resolv = 1; 3994 break; 3995 case 'q': 3996 do_quiet = 1; 3997 break; 3998 case 'S': 3999 show_sets = 1; 4000 break; 4001 case 't': 4002 do_time = 1; 4003 break; 4004 case 'v': /* verbose */ 4005 verbose++; 4006 break; 4007 default: 4008 show_usage(); 4009 } 4010 4011 ac -= optind; 4012 av += optind; 4013 NEED1("bad arguments, for usage summary ``ipfw''"); 4014 4015 /* 4016 * optional: pipe, queue or table 4017 */ 4018 if (!strncmp(*av, "pipe", strlen(*av))) { 4019 do_pipe = 1; 4020 ac--; 4021 av++; 4022 } else if (!strncmp(*av, "queue", strlen(*av))) { 4023 do_pipe = 2; 4024 ac--; 4025 av++; 4026 } else if (!strncmp(*av, "table", strlen(*av))) { 4027 do_table = 1; 4028 ac--; 4029 av++; 4030 } 4031 NEED1("missing command"); 4032 4033 /* 4034 * for pipes, queues and table we normally say 'pipe NN config' 4035 * but the code is easier to parse as 'pipe config NN' so we 4036 * swap the two arguments. 4037 */ 4038 if ((do_pipe > 0 || do_table > 0) && ac > 1 && 4039 *av[0] >= '0' && *av[0] <= '9') { 4040 char *p = av[0]; 4041 av[0] = av[1]; 4042 av[1] = p; 4043 } 4044 if (do_table) { 4045 if (!strncmp(*av, "create", strlen(*av))) 4046 table_create(ac, av); 4047 else if (!strncmp(*av, "destroy", strlen(*av))) 4048 table_flush(ac, av, IP_FW_TBL_DESTROY); 4049 else if (!strncmp(*av, "list", strlen(*av))) 4050 table_list(); 4051 else if (!strncmp(*av, "add", strlen(*av))) 4052 table_alt(ac, av, IP_FW_TBL_ADD); 4053 else if (!strncmp(*av, "delete", strlen(*av))) 4054 table_alt(ac, av, IP_FW_TBL_DEL); 4055 else if (!strncmp(*av, "flush", strlen(*av))) 4056 table_flush(ac, av, IP_FW_TBL_FLUSH); 4057 else if (!strncmp(*av, "print", strlen(*av))) 4058 table_show(ac, av); 4059 else if (!strncmp(*av, "show", strlen(*av))) { 4060 do_acct++; 4061 table_show(ac, av); 4062 } else if (!strncmp(*av, "zero", strlen(*av))) 4063 table_zero(ac, av); 4064 else if (!strncmp(*av, "expire", strlen(*av))) 4065 table_expire(ac, av); 4066 else 4067 errx(EX_USAGE, "bad command `%s'", *av); 4068 return 0; 4069 } 4070 if (!strncmp(*av, "add", strlen(*av))) 4071 add(ac, av); 4072 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 4073 config_pipe(ac, av); 4074 else if (!strncmp(*av, "delete", strlen(*av))) 4075 delete(ac, av); 4076 else if (!strncmp(*av, "flush", strlen(*av))) 4077 flush(); 4078 else if (!strncmp(*av, "zero", strlen(*av))) 4079 zero(ac, av); 4080 else if (!strncmp(*av, "resetlog", strlen(*av))) 4081 resetlog(ac, av); 4082 else if (!strncmp(*av, "print", strlen(*av)) || 4083 !strncmp(*av, "list", strlen(*av))) 4084 list(ac, av); 4085 else if (!strncmp(*av, "enable", strlen(*av))) 4086 sysctl_handler(ac, av, 1); 4087 else if (!strncmp(*av, "disable", strlen(*av))) 4088 sysctl_handler(ac, av, 0); 4089 else if (!strncmp(*av, "set", strlen(*av))) 4090 sets_handler(ac, av); 4091 else if (!strncmp(*av, "show", strlen(*av))) { 4092 do_acct++; 4093 list(ac, av); 4094 } else 4095 errx(EX_USAGE, "bad command `%s'", *av); 4096 return 0; 4097 } 4098 4099 4100 static void 4101 ipfw_readfile(int ac, char *av[]) 4102 { 4103 #define MAX_ARGS 32 4104 #define WHITESP " \t\f\v\n\r" 4105 char buf[BUFSIZ]; 4106 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 4107 char linename[20]; 4108 int i=0, lineno=0, qflag=0, pflag=0, status; 4109 FILE *f = NULL; 4110 pid_t preproc = 0; 4111 int c; 4112 4113 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 4114 switch(c) { 4115 case 'D': 4116 if (!pflag) 4117 errx(EX_USAGE, "-D requires -p"); 4118 if (i > MAX_ARGS - 2) 4119 errx(EX_USAGE, 4120 "too many -D or -U options"); 4121 args[i++] = __DECONST(char *, "-D"); 4122 args[i++] = optarg; 4123 break; 4124 4125 case 'U': 4126 if (!pflag) 4127 errx(EX_USAGE, "-U requires -p"); 4128 if (i > MAX_ARGS - 2) 4129 errx(EX_USAGE, 4130 "too many -D or -U options"); 4131 args[i++] = __DECONST(char *, "-U"); 4132 args[i++] = optarg; 4133 break; 4134 4135 case 'p': 4136 pflag = 1; 4137 cmd = optarg; 4138 args[0] = cmd; 4139 i = 1; 4140 break; 4141 4142 case 'q': 4143 qflag = 1; 4144 break; 4145 4146 default: 4147 errx(EX_USAGE, "bad arguments, for usage" 4148 " summary ``ipfw''"); 4149 } 4150 4151 av += optind; 4152 ac -= optind; 4153 if (ac != 1) 4154 errx(EX_USAGE, "extraneous filename arguments"); 4155 4156 if ((f = fopen(av[0], "r")) == NULL) 4157 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 4158 4159 if (pflag) { 4160 /* pipe through preprocessor (cpp or m4) */ 4161 int pipedes[2]; 4162 4163 args[i] = NULL; 4164 4165 if (pipe(pipedes) == -1) 4166 err(EX_OSERR, "cannot create pipe"); 4167 4168 switch((preproc = fork())) { 4169 case -1: 4170 err(EX_OSERR, "cannot fork"); 4171 4172 case 0: 4173 /* child */ 4174 if (dup2(fileno(f), 0) == -1 4175 || dup2(pipedes[1], 1) == -1) 4176 err(EX_OSERR, "dup2()"); 4177 fclose(f); 4178 close(pipedes[1]); 4179 close(pipedes[0]); 4180 execvp(cmd, args); 4181 err(EX_OSERR, "execvp(%s) failed", cmd); 4182 4183 default: 4184 /* parent */ 4185 fclose(f); 4186 close(pipedes[1]); 4187 if ((f = fdopen(pipedes[0], "r")) == NULL) { 4188 int savederrno = errno; 4189 4190 kill(preproc, SIGTERM); 4191 errno = savederrno; 4192 err(EX_OSERR, "fdopen()"); 4193 } 4194 } 4195 } 4196 4197 while (fgets(buf, BUFSIZ, f)) { 4198 lineno++; 4199 snprintf(linename, sizeof(linename), "Line %d", lineno); 4200 args[0] = linename; 4201 4202 if (*buf == '#') 4203 continue; 4204 if ((p = strchr(buf, '#')) != NULL) 4205 *p = '\0'; 4206 i = 1; 4207 if (qflag) 4208 args[i++] = __DECONST(char *, "-q"); 4209 for (a = strtok(buf, WHITESP); 4210 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 4211 args[i] = a; 4212 if (i == (qflag? 2: 1)) 4213 continue; 4214 if (i == MAX_ARGS) 4215 errx(EX_USAGE, "%s: too many arguments", 4216 linename); 4217 args[i] = NULL; 4218 4219 ipfw_main(i, args); 4220 } 4221 fclose(f); 4222 if (pflag) { 4223 if (waitpid(preproc, &status, 0) == -1) 4224 errx(EX_OSERR, "waitpid()"); 4225 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 4226 errx(EX_UNAVAILABLE, 4227 "preprocessor exited with status %d", 4228 WEXITSTATUS(status)); 4229 else if (WIFSIGNALED(status)) 4230 errx(EX_UNAVAILABLE, 4231 "preprocessor exited with signal %d", 4232 WTERMSIG(status)); 4233 } 4234 } 4235 4236 int 4237 main(int ac, char *av[]) 4238 { 4239 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 4240 if (s < 0) 4241 err(EX_UNAVAILABLE, "socket"); 4242 4243 /* 4244 * If the last argument is an absolute pathname, interpret it 4245 * as a file to be preprocessed. 4246 */ 4247 4248 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 4249 ipfw_readfile(ac, av); 4250 else 4251 ipfw_main(ac, av); 4252 return EX_OK; 4253 } 4254