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_ICMPCODES, 227 TOK_ICMPTYPES, 228 TOK_MAC, 229 TOK_MACTYPE, 230 231 TOK_PLR, 232 TOK_NOERROR, 233 TOK_BUCKETS, 234 TOK_DSTIP, 235 TOK_SRCIP, 236 TOK_DSTPORT, 237 TOK_SRCPORT, 238 TOK_ALL, 239 TOK_MASK, 240 TOK_BW, 241 TOK_DELAY, 242 TOK_RED, 243 TOK_GRED, 244 TOK_DROPTAIL, 245 TOK_PROTO, 246 TOK_WEIGHT, 247 }; 248 249 struct _s_x dummynet_params[] = { 250 { "plr", TOK_PLR }, 251 { "noerror", TOK_NOERROR }, 252 { "buckets", TOK_BUCKETS }, 253 { "dst-ip", TOK_DSTIP }, 254 { "src-ip", TOK_SRCIP }, 255 { "dst-port", TOK_DSTPORT }, 256 { "src-port", TOK_SRCPORT }, 257 { "proto", TOK_PROTO }, 258 { "weight", TOK_WEIGHT }, 259 { "all", TOK_ALL }, 260 { "mask", TOK_MASK }, 261 { "droptail", TOK_DROPTAIL }, 262 { "red", TOK_RED }, 263 { "gred", TOK_GRED }, 264 { "bw", TOK_BW }, 265 { "bandwidth", TOK_BW }, 266 { "delay", TOK_DELAY }, 267 { "pipe", TOK_PIPE }, 268 { "queue", TOK_QUEUE }, 269 { "dummynet-params", TOK_NULL }, 270 { NULL, 0 } 271 }; 272 273 struct _s_x rule_actions[] = { 274 { "accept", TOK_ACCEPT }, 275 { "pass", TOK_ACCEPT }, 276 { "allow", TOK_ACCEPT }, 277 { "permit", TOK_ACCEPT }, 278 { "count", TOK_COUNT }, 279 { "pipe", TOK_PIPE }, 280 { "queue", TOK_QUEUE }, 281 { "divert", TOK_DIVERT }, 282 { "tee", TOK_TEE }, 283 { "fwd", TOK_FORWARD }, 284 { "forward", TOK_FORWARD }, 285 { "skipto", TOK_SKIPTO }, 286 { "deny", TOK_DENY }, 287 { "drop", TOK_DENY }, 288 { "reject", TOK_REJECT }, 289 { "reset", TOK_RESET }, 290 { "unreach", TOK_UNREACH }, 291 { "check-state", TOK_CHECKSTATE }, 292 { "defrag", TOK_DEFRAG }, 293 { NULL, TOK_NULL }, 294 { NULL, 0 } 295 }; 296 297 struct _s_x rule_options[] = { 298 { "uid", TOK_UID }, 299 { "gid", TOK_GID }, 300 { "in", TOK_IN }, 301 { "limit", TOK_LIMIT }, 302 { "keep-state", TOK_KEEPSTATE }, 303 { "redirect", TOK_REDIRECT }, 304 { "rdr", TOK_REDIRECT }, 305 { "layer2", TOK_LAYER2 }, 306 { "out", TOK_OUT }, 307 { "xmit", TOK_XMIT }, 308 { "recv", TOK_RECV }, 309 { "via", TOK_VIA }, 310 { "fragment", TOK_FRAG }, 311 { "frag", TOK_FRAG }, 312 { "ipfrag", TOK_IPFRAG }, 313 { "ipoptions", TOK_IPOPTS }, 314 { "ipopts", TOK_IPOPTS }, 315 { "iplen", TOK_IPLEN }, 316 { "ipid", TOK_IPID }, 317 { "ipprecedence", TOK_IPPRECEDENCE }, 318 { "iptos", TOK_IPTOS }, 319 { "ipttl", TOK_IPTTL }, 320 { "ipversion", TOK_IPVER }, 321 { "ipver", TOK_IPVER }, 322 { "estab", TOK_ESTAB }, 323 { "established", TOK_ESTAB }, 324 { "setup", TOK_SETUP }, 325 { "tcpflags", TOK_TCPFLAGS }, 326 { "tcpflgs", TOK_TCPFLAGS }, 327 { "tcpoptions", TOK_TCPOPTS }, 328 { "tcpopts", TOK_TCPOPTS }, 329 { "tcpseq", TOK_TCPSEQ }, 330 { "tcpack", TOK_TCPACK }, 331 { "tcpwin", TOK_TCPWIN }, 332 { "icmpcode", TOK_ICMPCODES }, 333 { "icmpcodes", TOK_ICMPCODES }, 334 { "icmptype", TOK_ICMPTYPES }, 335 { "icmptypes", TOK_ICMPTYPES }, 336 { "dst-ip", TOK_DSTIP }, 337 { "src-ip", TOK_SRCIP }, 338 { "dst-port", TOK_DSTPORT }, 339 { "src-port", TOK_SRCPORT }, 340 { "proto", TOK_PROTO }, 341 { "MAC", TOK_MAC }, 342 { "mac", TOK_MAC }, 343 { "mac-type", TOK_MACTYPE }, 344 345 { "not", TOK_NOT }, /* pseudo option */ 346 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 347 { "or", TOK_OR }, /* pseudo option */ 348 { "|", /* escape */ TOK_OR }, /* pseudo option */ 349 { "{", TOK_STARTBRACE }, /* pseudo option */ 350 { "(", TOK_STARTBRACE }, /* pseudo option */ 351 { "}", TOK_ENDBRACE }, /* pseudo option */ 352 { ")", TOK_ENDBRACE }, /* pseudo option */ 353 { NULL, TOK_NULL }, 354 { NULL, 0 } 355 }; 356 357 /** 358 * match_token takes a table and a string, returns the value associated 359 * with the string (0 meaning an error in most cases) 360 */ 361 static int 362 match_token(struct _s_x *table, char *string) 363 { 364 struct _s_x *pt; 365 int i = strlen(string); 366 367 for (pt = table ; i && pt->s != NULL ; pt++) 368 if ((int)strlen(pt->s) == i && !bcmp(string, pt->s, i)) 369 return pt->x; 370 return -1; 371 }; 372 373 static const char * 374 match_value(struct _s_x *p, u_int32_t value) 375 { 376 for (; p->s != NULL; p++) 377 if (p->x == value) 378 return p->s; 379 return NULL; 380 } 381 382 /* 383 * prints one port, symbolic or numeric 384 */ 385 static void 386 print_port(int proto, u_int16_t port) 387 { 388 389 if (proto == IPPROTO_ETHERTYPE) { 390 const char *str; 391 392 if (do_resolv && (str = match_value(ether_types, port)) ) 393 printf("%s", str); 394 else 395 printf("0x%04x", port); 396 } else { 397 struct servent *se = NULL; 398 if (do_resolv) { 399 struct protoent *pe = getprotobynumber(proto); 400 401 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 402 } 403 if (se) 404 printf("%s", se->s_name); 405 else 406 printf("%d", port); 407 } 408 } 409 410 /* 411 * print the values in a list of ports 412 * XXX todo: add support for mask. 413 */ 414 static void 415 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 416 { 417 u_int16_t *p = cmd->ports; 418 int i; 419 const char *sep= " "; 420 421 if (cmd->o.len & F_NOT) 422 printf(" not"); 423 if (opcode != 0) 424 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : 425 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); 426 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 427 printf("%s", sep); 428 print_port(proto, p[0]); 429 if (p[0] != p[1]) { 430 printf("-"); 431 print_port(proto, p[1]); 432 } 433 sep = ","; 434 } 435 } 436 437 /* 438 * Like strtol, but also translates service names into port numbers 439 * for some protocols. 440 * In particular: 441 * proto == -1 disables the protocol check; 442 * proto == IPPROTO_ETHERTYPE looks up an internal table 443 * proto == <some value in /etc/protocols> matches the values there. 444 * Returns *end == s in case the parameter is not found. 445 */ 446 static int 447 strtoport(char *str, char **end, int base, int proto) 448 { 449 char *p, *buf; 450 char *s1; 451 int i; 452 453 *end = str; /* default - not found */ 454 if (*str == '\0') 455 return 0; /* not found */ 456 457 if (isdigit(*str)) 458 return strtol(str, end, base); 459 460 /* 461 * find separator. '\\' escapes the next char. 462 */ 463 for (s1 = str; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 464 if (*s1 == '\\' && s1[1] != '\0') 465 s1++; 466 467 buf = malloc(s1 - str + 1); 468 if (buf == NULL) 469 return 0; 470 471 /* 472 * copy into a buffer skipping backslashes 473 */ 474 for (p = str, i = 0; p != s1 ; p++) 475 if ( *p != '\\') 476 buf[i++] = *p; 477 buf[i++] = '\0'; 478 479 if (proto == IPPROTO_ETHERTYPE) { 480 i = match_token(ether_types, buf); 481 free(buf); 482 if (i != -1) { /* found */ 483 *end = s1; 484 return i; 485 } 486 } else { 487 struct protoent *pe = NULL; 488 struct servent *se; 489 490 if (proto != 0) 491 pe = getprotobynumber(proto); 492 setservent(1); 493 se = getservbyname(buf, pe ? pe->p_name : NULL); 494 free(buf); 495 if (se != NULL) { 496 *end = s1; 497 return ntohs(se->s_port); 498 } 499 } 500 return 0; /* not found */ 501 } 502 503 /* 504 * fill the body of the command with the list of port ranges. 505 * At the moment it only understands numeric ranges. 506 */ 507 static int 508 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 509 { 510 u_int16_t *p = cmd->ports; 511 int i = 0; 512 char *str = av; 513 514 while (*str) { 515 u_int16_t a, b; 516 517 a = strtoport(av, &str, 0, proto); 518 if (str == av) /* no parameter */ 519 break; 520 if (*str == '-') { /* a range */ 521 av = str+1; 522 b = strtoport(av, &str, 0, proto); 523 if (str == av) /* no parameter */ 524 break; 525 p[0] = a; 526 p[1] = b; 527 } else if (*str == ',' || *str == '\0' ) { 528 p[0] = p[1] = a; 529 } else { /* invalid separator */ 530 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 531 *str, av); 532 } 533 i++; 534 p += 2; 535 av = str+1; 536 } 537 if (i > 0) { 538 if (i+1 > F_LEN_MASK) 539 errx(EX_DATAERR, "too many ports/ranges\n"); 540 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 541 } 542 return i; 543 } 544 545 static struct _s_x icmpcodes[] = { 546 { "net", ICMP_UNREACH_NET }, 547 { "host", ICMP_UNREACH_HOST }, 548 { "protocol", ICMP_UNREACH_PROTOCOL }, 549 { "port", ICMP_UNREACH_PORT }, 550 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 551 { "srcfail", ICMP_UNREACH_SRCFAIL }, 552 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 553 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 554 { "isolated", ICMP_UNREACH_ISOLATED }, 555 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 556 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 557 { "tosnet", ICMP_UNREACH_TOSNET }, 558 { "toshost", ICMP_UNREACH_TOSHOST }, 559 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 560 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 561 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 562 { NULL, 0 } 563 }; 564 565 static void 566 fill_reject_code(u_short *codep, char *str) 567 { 568 int val; 569 char *s1; 570 571 val = strtoul(str, &s1, 0); 572 if (s1 == str || *s1 != '\0' || val >= 0x100) 573 val = match_token(icmpcodes, str); 574 if (val < 0) 575 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 576 *codep = val; 577 return; 578 } 579 580 static void 581 print_reject_code(u_int16_t code) 582 { 583 const char *str = match_value(icmpcodes, code); 584 585 if (str != NULL) 586 printf("unreach %s", str); 587 else 588 printf("unreach %u", code); 589 } 590 591 /* 592 * Returns the number of bits set (from left) in a contiguous bitmask, 593 * or -1 if the mask is not contiguous. 594 * XXX this needs a proper fix. 595 * This effectively works on masks in big-endian (network) format. 596 * when compiled on little endian architectures. 597 * 598 * First bit is bit 7 of the first byte -- note, for MAC addresses, 599 * the first bit on the wire is bit 0 of the first byte. 600 * len is the max length in bits. 601 */ 602 static int 603 contigmask(u_char *p, int len) 604 { 605 int i, n; 606 for (i=0; i<len ; i++) 607 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 608 break; 609 for (n=i+1; n < len; n++) 610 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 611 return -1; /* mask not contiguous */ 612 return i; 613 } 614 615 /* 616 * print flags set/clear in the two bitmasks passed as parameters. 617 * There is a specialized check for f_tcpflags. 618 */ 619 static void 620 print_flags(const char *name, ipfw_insn *cmd, struct _s_x *list) 621 { 622 const char *comma=""; 623 int i; 624 u_char set = cmd->arg1 & 0xff; 625 u_char clear = (cmd->arg1 >> 8) & 0xff; 626 627 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 628 printf(" setup"); 629 return; 630 } 631 632 printf(" %s ", name); 633 for (i=0; list[i].x != 0; i++) { 634 if (set & list[i].x) { 635 set &= ~list[i].x; 636 printf("%s%s", comma, list[i].s); 637 comma = ","; 638 } 639 if (clear & list[i].x) { 640 clear &= ~list[i].x; 641 printf("%s!%s", comma, list[i].s); 642 comma = ","; 643 } 644 } 645 } 646 647 /* 648 * Print the ip address contained in a command. 649 */ 650 static void 651 print_ip(ipfw_insn_ip *cmd, const char *str) 652 { 653 struct hostent *he = NULL; 654 int mb; 655 656 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", str); 657 658 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 659 printf("me"); 660 return; 661 } 662 if (cmd->o.opcode == O_IP_SRC_TABLE || 663 cmd->o.opcode == O_IP_DST_TABLE) { 664 printf("<%u>", cmd->o.arg1); 665 return; 666 } 667 if (cmd->o.opcode == O_IP_SRC_IFIP || 668 cmd->o.opcode == O_IP_DST_IFIP) { 669 printf("[%s%s]", ((ipfw_insn_ifip *)cmd)->ifname, 670 (cmd->o.arg1 & IPFW_IFIP_NET) ? ":net" : ""); 671 return; 672 } 673 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 674 u_int32_t x, *d; 675 int i; 676 char comma = '{'; 677 678 x = cmd->o.arg1 - 1; 679 x = htonl( ~x ); 680 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 681 printf("%s/%d", inet_ntoa(cmd->addr), 682 contigmask((u_char *)&x, 32)); 683 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 684 x &= 0xff; /* base */ 685 d = (u_int32_t *)&(cmd->mask); 686 for (i=0; i < cmd->o.arg1; i++) 687 if (d[ i/32] & (1<<(i & 31))) { 688 printf("%c%d", comma, i+x); 689 comma = ','; 690 } 691 printf("}"); 692 return; 693 } 694 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 695 mb = 32; 696 else 697 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 698 if (mb == 32 && do_resolv) 699 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long), 700 AF_INET); 701 if (he != NULL) /* resolved to name */ 702 printf("%s", he->h_name); 703 else if (mb == 0) /* any */ 704 printf("any"); 705 else { /* numeric IP followed by some kind of mask */ 706 printf("%s", inet_ntoa(cmd->addr)); 707 if (mb < 0) 708 printf(":%s", inet_ntoa(cmd->mask)); 709 else if (mb < 32) 710 printf("/%d", mb); 711 } 712 } 713 714 /* 715 * prints a MAC address/mask pair 716 */ 717 static void 718 print_mac(u_char *addr, u_char *mask) 719 { 720 int l = contigmask(mask, 48); 721 722 if (l == 0) 723 printf(" any"); 724 else { 725 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 726 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 727 if (l == -1) 728 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 729 mask[0], mask[1], mask[2], 730 mask[3], mask[4], mask[5]); 731 else if (l < 48) 732 printf("/%d", l); 733 } 734 } 735 736 static void 737 fill_icmp(enum ipfw_opcodes op, ipfw_insn_u32 *cmd, char *av) 738 { 739 u_int8_t type; 740 int idx_max = 0, idx; 741 742 /* 256 / 32, (max icmp types / 32 bits). */ 743 for (idx = 0; idx < 8; ++idx) 744 cmd->d[idx] = 0; 745 746 while (*av) { 747 if (*av == ',') 748 av++; 749 750 type = strtoul(av, &av, 0); 751 if (*av != ',' && *av != '\0') { 752 errx(EX_DATAERR, "invalid ICMP %s", 753 op == O_ICMPTYPE ? "types" : "codes"); 754 } 755 756 idx = type / 32; 757 cmd->d[idx] |= 1 << (type % 32); 758 759 if (idx > idx_max) 760 idx_max = idx; 761 } 762 cmd->o.opcode = op; 763 cmd->o.len |= (F_INSN_SIZE(ipfw_insn_u32) + idx_max); 764 } 765 766 static void 767 print_icmp(ipfw_insn_u32 *cmd) 768 { 769 int idx, idx_max; 770 char sep= ' '; 771 772 idx_max = F_LEN(&cmd->o) - F_INSN_SIZE(ipfw_insn); 773 774 if (cmd->o.opcode == O_ICMPTYPE) 775 printf(" icmptypes"); 776 else 777 printf(" icmpcodes"); 778 for (idx = 0; idx < idx_max; ++idx) { 779 uint32_t types = cmd->d[idx]; 780 781 while (types != 0) { 782 int type_shift = ffs(types) - 1; 783 784 types &= ~(1 << type_shift); 785 printf("%c%d", sep, (idx * 32) + type_shift); 786 sep = ','; 787 } 788 } 789 } 790 791 /* 792 * show_ipfw() prints the body of an ipfw rule. 793 * Because the standard rule has at least proto src_ip dst_ip, we use 794 * a helper function to produce these entries if not provided explicitly. 795 * The first argument is the list of fields we have, the second is 796 * the list of fields we want to be printed. 797 * 798 * Special cases if we have provided a MAC header: 799 * + if the rule does not contain IP addresses/ports, do not print them; 800 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 801 * 802 * Once we have 'have_options', IP header fields are printed as options. 803 */ 804 #define HAVE_PROTO 0x0001 805 #define HAVE_SRCIP 0x0002 806 #define HAVE_DSTIP 0x0004 807 #define HAVE_MAC 0x0008 808 #define HAVE_MACTYPE 0x0010 809 #define HAVE_OPTIONS 0x8000 810 811 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 812 static void 813 show_prerequisites(int *flags, int want, int cmd) 814 { 815 if ( (*flags & HAVE_IP) == HAVE_IP) 816 *flags |= HAVE_OPTIONS; 817 818 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 819 cmd != O_MAC_TYPE) { 820 /* 821 * mac-type was optimized out by the compiler, 822 * restore it 823 */ 824 printf(" any"); 825 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 826 return; 827 } 828 if ( !(*flags & HAVE_OPTIONS)) { 829 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 830 printf(" ip"); 831 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 832 printf(" from any"); 833 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 834 printf(" to any"); 835 } 836 *flags |= want; 837 } 838 839 static void 840 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth) 841 { 842 static int twidth = 0; 843 int l; 844 ipfw_insn *cmd; 845 int proto = 0; /* default */ 846 int flags = 0; /* prerequisites */ 847 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 848 int or_block = 0; /* we are in an or block */ 849 850 u_int32_t set_disable = rule->set_disable; 851 852 if (set_disable & (1 << rule->set)) { /* disabled */ 853 if (!show_sets) 854 return; 855 else 856 printf("# DISABLED "); 857 } 858 printf("%05u ", rule->rulenum); 859 860 if (do_acct) 861 printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth, 862 (uintmax_t)rule->bcnt); 863 864 if (do_time) { 865 char timestr[30]; 866 867 if (twidth == 0) { 868 time_t t0 = 0; 869 870 strcpy(timestr, ctime(&t0)); 871 *strchr(timestr, '\n') = '\0'; 872 twidth = strlen(timestr); 873 } 874 if (rule->timestamp) { 875 time_t t = _long_to_time(rule->timestamp); 876 877 strcpy(timestr, ctime(&t)); 878 *strchr(timestr, '\n') = '\0'; 879 printf("%s ", timestr); 880 } else { 881 printf("%*s ", twidth, " "); 882 } 883 } 884 885 if (show_sets) 886 printf("set %d ", rule->set); 887 888 /* 889 * print the optional "match probability" 890 */ 891 if (rule->cmd_len > 0) { 892 cmd = rule->cmd ; 893 if (cmd->opcode == O_PROB) { 894 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 895 double d = 1.0 * p->d[0]; 896 897 d = (d / 0x7fffffff); 898 printf("prob %f ", d); 899 } 900 } 901 902 /* 903 * first print actions 904 */ 905 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 906 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 907 switch(cmd->opcode) { 908 case O_CHECK_STATE: 909 printf("check-state"); 910 flags = HAVE_IP; /* avoid printing anything else */ 911 break; 912 913 case O_ACCEPT: 914 printf("allow"); 915 break; 916 917 case O_COUNT: 918 printf("count"); 919 break; 920 921 case O_DEFRAG: 922 printf("defrag"); 923 break; 924 925 case O_DENY: 926 printf("deny"); 927 break; 928 929 case O_REJECT: 930 if (cmd->arg1 == ICMP_REJECT_RST) 931 printf("reset"); 932 else if (cmd->arg1 == ICMP_UNREACH_HOST) 933 printf("reject"); 934 else 935 print_reject_code(cmd->arg1); 936 break; 937 938 case O_SKIPTO: 939 printf("skipto %u", cmd->arg1); 940 break; 941 942 case O_PIPE: 943 printf("pipe %u", cmd->arg1); 944 break; 945 946 case O_QUEUE: 947 printf("queue %u", cmd->arg1); 948 break; 949 950 case O_DIVERT: 951 printf("divert %u", cmd->arg1); 952 break; 953 954 case O_TEE: 955 printf("tee %u", cmd->arg1); 956 break; 957 958 case O_FORWARD_IP: 959 { 960 ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd; 961 962 printf("fwd %s", inet_ntoa(sa->sa.sin_addr)); 963 if (sa->sa.sin_port) 964 printf(",%d", sa->sa.sin_port); 965 } 966 break; 967 968 case O_LOG: /* O_LOG is printed last */ 969 logptr = (ipfw_insn_log *)cmd; 970 break; 971 972 default: 973 printf("** unrecognized action %d len %d", 974 cmd->opcode, cmd->len); 975 } 976 } 977 if (logptr) { 978 if (logptr->max_log > 0) 979 printf(" log logamount %d", logptr->max_log); 980 else 981 printf(" log"); 982 } 983 984 /* 985 * then print the body. 986 */ 987 if (rule->usr_flags & IPFW_USR_F_NORULE) { 988 /* empty rules before options */ 989 if (!do_compact) 990 printf(" ip from any to any"); 991 flags |= HAVE_IP | HAVE_OPTIONS; 992 } 993 994 for (l = rule->act_ofs, cmd = rule->cmd ; 995 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 996 /* useful alias */ 997 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 998 999 show_prerequisites(&flags, 0, cmd->opcode); 1000 1001 switch(cmd->opcode) { 1002 case O_PROB: 1003 break; /* done already */ 1004 1005 case O_PROBE_STATE: 1006 break; /* no need to print anything here */ 1007 1008 case O_MACADDR2: { 1009 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1010 1011 if ((cmd->len & F_OR) && !or_block) 1012 printf(" {"); 1013 if (cmd->len & F_NOT) 1014 printf(" not"); 1015 printf(" MAC"); 1016 flags |= HAVE_MAC; 1017 print_mac( m->addr, m->mask); 1018 print_mac( m->addr + 6, m->mask + 6); 1019 } 1020 break; 1021 1022 case O_MAC_TYPE: 1023 if ((cmd->len & F_OR) && !or_block) 1024 printf(" {"); 1025 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1026 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1027 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1028 break; 1029 1030 case O_IP_SRC: 1031 case O_IP_SRC_MASK: 1032 case O_IP_SRC_ME: 1033 case O_IP_SRC_SET: 1034 case O_IP_SRC_TABLE: 1035 case O_IP_SRC_IFIP: 1036 show_prerequisites(&flags, HAVE_PROTO, 0); 1037 if (!(flags & HAVE_SRCIP)) 1038 printf(" from"); 1039 if ((cmd->len & F_OR) && !or_block) 1040 printf(" {"); 1041 print_ip((ipfw_insn_ip *)cmd, 1042 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1043 flags |= HAVE_SRCIP; 1044 break; 1045 1046 case O_IP_DST: 1047 case O_IP_DST_MASK: 1048 case O_IP_DST_ME: 1049 case O_IP_DST_SET: 1050 case O_IP_DST_TABLE: 1051 case O_IP_DST_IFIP: 1052 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1053 if (!(flags & HAVE_DSTIP)) 1054 printf(" to"); 1055 if ((cmd->len & F_OR) && !or_block) 1056 printf(" {"); 1057 print_ip((ipfw_insn_ip *)cmd, 1058 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1059 flags |= HAVE_DSTIP; 1060 break; 1061 1062 case O_IP_DSTPORT: 1063 show_prerequisites(&flags, HAVE_IP, 0); 1064 /* FALLTHROUGH */ 1065 case O_IP_SRCPORT: 1066 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1067 if ((cmd->len & F_OR) && !or_block) 1068 printf(" {"); 1069 print_newports((ipfw_insn_u16 *)cmd, proto, 1070 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1071 break; 1072 1073 case O_PROTO: { 1074 struct protoent *pe; 1075 1076 if ((cmd->len & F_OR) && !or_block) 1077 printf(" {"); 1078 if (cmd->len & F_NOT) 1079 printf(" not"); 1080 proto = cmd->arg1; 1081 pe = getprotobynumber(cmd->arg1); 1082 if (flags & HAVE_OPTIONS) 1083 printf(" proto"); 1084 if (pe) 1085 printf(" %s", pe->p_name); 1086 else 1087 printf(" %u", cmd->arg1); 1088 } 1089 flags |= HAVE_PROTO; 1090 break; 1091 1092 default: /*options ... */ 1093 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1094 if ((cmd->len & F_OR) && !or_block) 1095 printf(" {"); 1096 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1097 printf(" not"); 1098 switch(cmd->opcode) { 1099 case O_FRAG: 1100 printf(" frag"); 1101 break; 1102 1103 case O_IPFRAG: 1104 printf(" ipfrag"); 1105 break; 1106 1107 case O_IN: 1108 printf(cmd->len & F_NOT ? " out" : " in"); 1109 break; 1110 1111 case O_LAYER2: 1112 printf(" layer2"); 1113 break; 1114 case O_XMIT: 1115 case O_RECV: 1116 case O_VIA: { 1117 const char *dir; 1118 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1119 1120 if (cmd->opcode == O_XMIT) 1121 dir = "xmit"; 1122 else if (cmd->opcode == O_RECV) 1123 dir = "recv"; 1124 else if (cmd->opcode == O_VIA) 1125 dir = "via"; 1126 else 1127 dir = "?huh?"; 1128 if (cmdif->name[0] == '\0') 1129 printf(" %s %s", dir, 1130 inet_ntoa(cmdif->p.ip)); 1131 printf(" %s %s", dir, cmdif->name); 1132 } 1133 break; 1134 1135 case O_IPID: 1136 printf(" ipid %u", cmd->arg1 ); 1137 break; 1138 1139 case O_IPTTL: 1140 printf(" ipttl %u", cmd->arg1 ); 1141 break; 1142 1143 case O_IPVER: 1144 printf(" ipver %u", cmd->arg1 ); 1145 break; 1146 1147 case O_IPPRECEDENCE: 1148 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1149 break; 1150 1151 case O_IPLEN: 1152 printf(" iplen %u", cmd->arg1 ); 1153 break; 1154 1155 case O_IPOPT: 1156 print_flags("ipoptions", cmd, f_ipopts); 1157 break; 1158 1159 case O_IPTOS: 1160 print_flags("iptos", cmd, f_iptos); 1161 break; 1162 1163 case O_ICMPCODE: 1164 case O_ICMPTYPE: 1165 print_icmp((ipfw_insn_u32 *)cmd); 1166 break; 1167 1168 case O_ESTAB: 1169 printf(" established"); 1170 break; 1171 1172 case O_TCPFLAGS: 1173 print_flags("tcpflags", cmd, f_tcpflags); 1174 break; 1175 1176 case O_TCPOPTS: 1177 print_flags("tcpoptions", cmd, f_tcpopts); 1178 break; 1179 1180 case O_TCPWIN: 1181 printf(" tcpwin %d", ntohs(cmd->arg1)); 1182 break; 1183 1184 case O_TCPACK: 1185 printf(" tcpack %u", ntohl(cmd32->d[0])); 1186 break; 1187 1188 case O_TCPSEQ: 1189 printf(" tcpseq %u", ntohl(cmd32->d[0])); 1190 break; 1191 1192 case O_UID: 1193 { 1194 struct passwd *pwd = getpwuid(cmd32->d[0]); 1195 1196 if (pwd) 1197 printf(" uid %s", pwd->pw_name); 1198 else 1199 printf(" uid %u", cmd32->d[0]); 1200 } 1201 break; 1202 1203 case O_GID: 1204 { 1205 struct group *grp = getgrgid(cmd32->d[0]); 1206 1207 if (grp) 1208 printf(" gid %s", grp->gr_name); 1209 else 1210 printf(" gid %u", cmd32->d[0]); 1211 } 1212 break; 1213 1214 case O_KEEP_STATE: 1215 printf(" keep-state"); 1216 break; 1217 1218 case O_REDIRECT: 1219 { 1220 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd; 1221 1222 printf(" rdr %s", inet_ntoa(c->addr)); 1223 if (c->port != 0) 1224 printf(",%u", ntohs(c->port)); 1225 break; 1226 } 1227 1228 case O_LIMIT: 1229 { 1230 struct _s_x *p = limit_masks; 1231 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1232 u_int8_t x = c->limit_mask; 1233 const char *comma = " "; 1234 1235 printf(" limit"); 1236 for ( ; p->x != 0 ; p++) 1237 if ((x & p->x) == p->x) { 1238 x &= ~p->x; 1239 printf("%s%s", comma, p->s); 1240 comma = ","; 1241 } 1242 printf(" %d", c->conn_limit); 1243 } 1244 break; 1245 1246 default: 1247 printf(" [opcode %d len %d]", 1248 cmd->opcode, cmd->len); 1249 } 1250 } 1251 if (cmd->len & F_OR) { 1252 printf(" or"); 1253 or_block = 1; 1254 } else if (or_block) { 1255 printf(" }"); 1256 or_block = 0; 1257 } 1258 } 1259 show_prerequisites(&flags, HAVE_IP, 0); 1260 1261 printf("\n"); 1262 } 1263 1264 static void 1265 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth) 1266 { 1267 struct protoent *pe; 1268 struct in_addr a; 1269 1270 if (!do_expired) { 1271 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1272 return; 1273 } 1274 1275 printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt, 1276 bcwidth, (uintmax_t)d->bcnt, d->expire); 1277 switch (d->dyn_type) { 1278 case O_LIMIT_PARENT: 1279 printf(" PARENT %d", d->count); 1280 break; 1281 case O_LIMIT: 1282 printf(" LIMIT"); 1283 break; 1284 case O_KEEP_STATE: /* bidir, no mask */ 1285 printf(" STATE"); 1286 break; 1287 case O_REDIRECT: 1288 printf(" REDIRECT"); 1289 break; 1290 } 1291 1292 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL) 1293 printf(" %s", pe->p_name); 1294 else 1295 printf(" proto %u", d->id.u.ip.proto); 1296 1297 a.s_addr = htonl(d->id.u.ip.src_ip); 1298 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port); 1299 1300 a.s_addr = htonl(d->id.u.ip.dst_ip); 1301 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port); 1302 1303 if (d->dyn_type == O_REDIRECT) { 1304 struct in_addr xlat_addr; 1305 1306 xlat_addr.s_addr = htonl(d->xlat_addr); 1307 printf(" => %s %d", inet_ntoa(xlat_addr), d->xlat_port); 1308 } 1309 printf("\n"); 1310 } 1311 1312 static int 1313 sort_q(const void *pa, const void *pb) 1314 { 1315 int rev = (do_sort < 0); 1316 int field = rev ? -do_sort : do_sort; 1317 long long res = 0; 1318 const struct dn_ioc_flowqueue *a = pa; 1319 const struct dn_ioc_flowqueue *b = pb; 1320 1321 switch (field) { 1322 case 1: /* pkts */ 1323 res = a->len - b->len; 1324 break; 1325 case 2: /* bytes */ 1326 res = a->len_bytes - b->len_bytes; 1327 break; 1328 1329 case 3: /* tot pkts */ 1330 res = a->tot_pkts - b->tot_pkts; 1331 break; 1332 1333 case 4: /* tot bytes */ 1334 res = a->tot_bytes - b->tot_bytes; 1335 break; 1336 } 1337 if (res < 0) 1338 res = -1; 1339 if (res > 0) 1340 res = 1; 1341 return (int)(rev ? res : -res); 1342 } 1343 1344 static void 1345 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) 1346 { 1347 int l; 1348 1349 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1350 fs->flow_mask.u.ip.proto, 1351 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, 1352 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); 1353 if (fs->rq_elements == 0) 1354 return; 1355 1356 printf("BKT Prot ___Source IP/port____ " 1357 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1358 if (do_sort != 0) 1359 heapsort(q, fs->rq_elements, sizeof(*q), sort_q); 1360 for (l = 0; l < fs->rq_elements; l++) { 1361 struct in_addr ina; 1362 struct protoent *pe; 1363 1364 ina.s_addr = htonl(q[l].id.u.ip.src_ip); 1365 printf("%3d ", q[l].hash_slot); 1366 pe = getprotobynumber(q[l].id.u.ip.proto); 1367 if (pe) 1368 printf("%-4s ", pe->p_name); 1369 else 1370 printf("%4u ", q[l].id.u.ip.proto); 1371 printf("%15s/%-5d ", 1372 inet_ntoa(ina), q[l].id.u.ip.src_port); 1373 ina.s_addr = htonl(q[l].id.u.ip.dst_ip); 1374 printf("%15s/%-5d ", 1375 inet_ntoa(ina), q[l].id.u.ip.dst_port); 1376 printf("%4ju %8ju %2u %4u %3u\n", 1377 (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes, 1378 q[l].len, q[l].len_bytes, q[l].drops); 1379 if (verbose) 1380 printf(" S %20ju F %20ju\n", 1381 (uintmax_t)q[l].S, (uintmax_t)q[l].F); 1382 } 1383 } 1384 1385 static void 1386 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) 1387 { 1388 int l; 1389 char qs[30]; 1390 char plr[30]; 1391 char red[90]; /* Display RED parameters */ 1392 1393 l = fs->qsize; 1394 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1395 if (l >= 8192) 1396 sprintf(qs, "%d KB", l / 1024); 1397 else 1398 sprintf(qs, "%d B", l); 1399 } else 1400 sprintf(qs, "%3d sl.", l); 1401 if (fs->plr) 1402 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1403 else 1404 plr[0] = '\0'; 1405 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1406 sprintf(red, 1407 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1408 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1409 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1410 SCALE_VAL(fs->min_th), 1411 SCALE_VAL(fs->max_th), 1412 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1413 else 1414 sprintf(red, "droptail"); 1415 1416 printf("%s %s%s %d queues (%d buckets) %s\n", 1417 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1418 } 1419 1420 static void 1421 list_pipes(void *data, int nbytes, int ac, char *av[]) 1422 { 1423 u_long rulenum; 1424 void *next = data; 1425 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; 1426 struct dn_ioc_flowset *fs; 1427 struct dn_ioc_flowqueue *q; 1428 int l; 1429 1430 if (ac > 0) 1431 rulenum = strtoul(*av++, NULL, 10); 1432 else 1433 rulenum = 0; 1434 for (; nbytes >= (int)sizeof(*p); p = (struct dn_ioc_pipe *)next) { 1435 double b = p->bandwidth; 1436 char buf[30]; 1437 char prefix[80]; 1438 1439 if (p->fs.fs_type != DN_IS_PIPE) 1440 break; /* done with pipes, now queues */ 1441 1442 /* 1443 * compute length, as pipe have variable size 1444 */ 1445 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1446 next = (uint8_t *)p + l; 1447 nbytes -= l; 1448 1449 if (rulenum != 0 && rulenum != (u_long)p->pipe_nr) 1450 continue; 1451 1452 /* 1453 * Print rate 1454 */ 1455 if (b == 0) 1456 sprintf(buf, "unlimited"); 1457 else if (b >= 1000000) 1458 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1459 else if (b >= 1000) 1460 sprintf(buf, "%7.3f Kbit/s", b/1000); 1461 else 1462 sprintf(buf, "%7.3f bit/s ", b); 1463 1464 sprintf(prefix, "%05d: %s %4d ms ", 1465 p->pipe_nr, buf, p->delay); 1466 print_flowset_parms(&p->fs, prefix); 1467 if (verbose) 1468 printf(" V %20ju\n", (uintmax_t)p->V >> MY_M); 1469 1470 q = (struct dn_ioc_flowqueue *)(p+1); 1471 list_queues(&p->fs, q); 1472 } 1473 for (fs = next; nbytes >= (int)sizeof(*fs); fs = next) { 1474 char prefix[80]; 1475 1476 if (fs->fs_type != DN_IS_QUEUE) 1477 break; 1478 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1479 next = (uint8_t *)fs + l; 1480 nbytes -= l; 1481 q = (struct dn_ioc_flowqueue *)(fs+1); 1482 sprintf(prefix, "q%05d: weight %d pipe %d ", 1483 fs->fs_nr, fs->weight, fs->parent_nr); 1484 print_flowset_parms(fs, prefix); 1485 list_queues(fs, q); 1486 } 1487 } 1488 1489 /* 1490 * This one handles all set-related commands 1491 * ipfw set { show | enable | disable } 1492 * ipfw set swap X Y 1493 * ipfw set move X to Y 1494 * ipfw set move rule X to Y 1495 */ 1496 static void 1497 sets_handler(int ac, char *av[]) 1498 { 1499 u_int32_t set_disable, masks[2]; 1500 int i, nbytes; 1501 u_int16_t rulenum; 1502 u_int8_t cmd, new_set; 1503 1504 ac--; 1505 av++; 1506 1507 if (!ac) 1508 errx(EX_USAGE, "set needs command"); 1509 if (!strncmp(*av, "show", strlen(*av)) ) { 1510 void *data; 1511 const char *msg; 1512 1513 nbytes = sizeof(struct ipfw_ioc_rule); 1514 if ((data = malloc(nbytes)) == NULL) 1515 err(EX_OSERR, "malloc"); 1516 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1517 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1518 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable; 1519 1520 for (i = 0, msg = "disable" ; i < 31; i++) 1521 if ( (set_disable & (1<<i))) { 1522 printf("%s %d", msg, i); 1523 msg = ""; 1524 } 1525 msg = (set_disable) ? " enable" : "enable"; 1526 for (i = 0; i < 31; i++) 1527 if ( !(set_disable & (1<<i))) { 1528 printf("%s %d", msg, i); 1529 msg = ""; 1530 } 1531 printf("\n"); 1532 } else if (!strncmp(*av, "swap", strlen(*av))) { 1533 ac--; av++; 1534 if (ac != 2) 1535 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1536 rulenum = atoi(av[0]); 1537 new_set = atoi(av[1]); 1538 if (!isdigit(*(av[0])) || rulenum > 30) 1539 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1540 if (!isdigit(*(av[1])) || new_set > 30) 1541 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1542 masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1543 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1544 masks, sizeof(u_int32_t)); 1545 } else if (!strncmp(*av, "move", strlen(*av))) { 1546 ac--; av++; 1547 if (ac && !strncmp(*av, "rule", strlen(*av))) { 1548 cmd = 2; 1549 ac--; av++; 1550 } else 1551 cmd = 3; 1552 if (ac != 3 || strncmp(av[1], "to", strlen(*av))) 1553 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1554 rulenum = atoi(av[0]); 1555 new_set = atoi(av[2]); 1556 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || 1557 (cmd == 2 && rulenum == 65535) ) 1558 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1559 if (!isdigit(*(av[2])) || new_set > 30) 1560 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1561 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1562 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, 1563 masks, sizeof(u_int32_t)); 1564 } else if (!strncmp(*av, "disable", strlen(*av)) || 1565 !strncmp(*av, "enable", strlen(*av)) ) { 1566 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; 1567 1568 ac--; av++; 1569 masks[0] = masks[1] = 0; 1570 1571 while (ac) { 1572 if (isdigit(**av)) { 1573 i = atoi(*av); 1574 if (i < 0 || i > 30) 1575 errx(EX_DATAERR, 1576 "invalid set number %d\n", i); 1577 masks[which] |= (1<<i); 1578 } else if (!strncmp(*av, "disable", strlen(*av))) 1579 which = 0; 1580 else if (!strncmp(*av, "enable", strlen(*av))) 1581 which = 1; 1582 else 1583 errx(EX_DATAERR, 1584 "invalid set command %s\n", *av); 1585 av++; ac--; 1586 } 1587 if ( (masks[0] & masks[1]) != 0 ) 1588 errx(EX_DATAERR, 1589 "cannot enable and disable the same set\n"); 1590 1591 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); 1592 if (i) 1593 warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1594 } else 1595 errx(EX_USAGE, "invalid set command %s\n", *av); 1596 } 1597 1598 static void 1599 sysctl_handler(int ac, char *av[], int which) 1600 { 1601 ac--; 1602 av++; 1603 1604 if (*av == NULL) { 1605 warnx("missing keyword to enable/disable\n"); 1606 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { 1607 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1608 &which, sizeof(which)); 1609 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { 1610 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1611 &which, sizeof(which)); 1612 } else if (strncmp(*av, "debug", strlen(*av)) == 0) { 1613 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1614 &which, sizeof(which)); 1615 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { 1616 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1617 &which, sizeof(which)); 1618 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { 1619 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1620 &which, sizeof(which)); 1621 } else { 1622 warnx("unrecognize enable/disable keyword: %s\n", *av); 1623 } 1624 } 1625 1626 static void 1627 list(int ac, char *av[]) 1628 { 1629 struct ipfw_ioc_rule *r; 1630 struct ipfw_ioc_state *dynrules, *d; 1631 1632 void *data = NULL; 1633 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1634 int exitval = EX_OK; 1635 int lac; 1636 char **lav; 1637 u_long rnum; 1638 char *endptr; 1639 int seen = 0; 1640 1641 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1642 int nalloc = 1024; /* start somewhere... */ 1643 1644 ac--; 1645 av++; 1646 1647 /* get rules or pipes from kernel, resizing array as necessary */ 1648 nbytes = nalloc; 1649 1650 while (nbytes >= nalloc) { 1651 nalloc = nalloc * 2 + 200; 1652 nbytes = nalloc; 1653 if ((data = realloc(data, nbytes)) == NULL) 1654 err(EX_OSERR, "realloc"); 1655 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) 1656 err(EX_OSERR, "getsockopt(IP_%s_GET)", 1657 do_pipe ? "DUMMYNET" : "FW"); 1658 } 1659 1660 if (do_pipe) { 1661 list_pipes(data, nbytes, ac, av); 1662 goto done; 1663 } 1664 1665 /* 1666 * Count static rules. 1667 */ 1668 r = data; 1669 nstat = r->static_count; 1670 1671 /* 1672 * Count dynamic rules. This is easier as they have 1673 * fixed size. 1674 */ 1675 dynrules = (struct ipfw_ioc_state *)((uint8_t *)r + r->static_len); 1676 ndyn = (nbytes - r->static_len) / sizeof(*dynrules); 1677 1678 /* if showing stats, figure out column widths ahead of time */ 1679 bcwidth = pcwidth = 0; 1680 if (do_acct) { 1681 for (n = 0, r = data; n < nstat; n++, 1682 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) { 1683 /* packet counter */ 1684 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt); 1685 if (width > pcwidth) 1686 pcwidth = width; 1687 1688 /* byte counter */ 1689 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt); 1690 if (width > bcwidth) 1691 bcwidth = width; 1692 } 1693 } 1694 if (do_dynamic && ndyn) { 1695 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1696 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt); 1697 if (width > pcwidth) 1698 pcwidth = width; 1699 1700 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt); 1701 if (width > bcwidth) 1702 bcwidth = width; 1703 } 1704 } 1705 /* if no rule numbers were specified, list all rules */ 1706 if (ac == 0) { 1707 for (n = 0, r = data; n < nstat; n++, 1708 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) 1709 show_ipfw(r, pcwidth, bcwidth); 1710 1711 if (do_dynamic && ndyn) { 1712 printf("## Dynamic rules (%d):\n", ndyn); 1713 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1714 show_dyn_ipfw(d, pcwidth, bcwidth); 1715 } 1716 goto done; 1717 } 1718 1719 /* display specific rules requested on command line */ 1720 1721 for (lac = ac, lav = av; lac != 0; lac--) { 1722 /* convert command line rule # */ 1723 rnum = strtoul(*lav++, &endptr, 10); 1724 if (*endptr) { 1725 exitval = EX_USAGE; 1726 warnx("invalid rule number: %s", *(lav - 1)); 1727 continue; 1728 } 1729 for (n = seen = 0, r = data; n < nstat; n++, 1730 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) { 1731 if (r->rulenum > rnum) 1732 break; 1733 if (r->rulenum == rnum) { 1734 show_ipfw(r, pcwidth, bcwidth); 1735 seen = 1; 1736 } 1737 } 1738 if (!seen) { 1739 /* give precedence to other error(s) */ 1740 if (exitval == EX_OK) 1741 exitval = EX_UNAVAILABLE; 1742 warnx("rule %lu does not exist", rnum); 1743 } 1744 } 1745 1746 if (do_dynamic && ndyn) { 1747 printf("## Dynamic rules:\n"); 1748 for (lac = ac, lav = av; lac != 0; lac--) { 1749 rnum = strtoul(*lav++, &endptr, 10); 1750 if (*endptr) 1751 /* already warned */ 1752 continue; 1753 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1754 if (d->rulenum > rnum) 1755 break; 1756 if (d->rulenum == rnum) 1757 show_dyn_ipfw(d, pcwidth, bcwidth); 1758 } 1759 } 1760 } 1761 1762 ac = 0; 1763 1764 done: 1765 free(data); 1766 1767 if (exitval != EX_OK) 1768 exit(exitval); 1769 } 1770 1771 static void 1772 show_usage(void) 1773 { 1774 fprintf(stderr, "usage: ipfw [options]\n" 1775 " add [number] rule\n" 1776 " pipe number config [pipeconfig]\n" 1777 " queue number config [queueconfig]\n" 1778 " [pipe] flush\n" 1779 " [pipe] delete number ...\n" 1780 " [pipe] {list|show} [number ...]\n" 1781 " {zero|resetlog} [number ...]\n" 1782 "do \"ipfw -h\" or see ipfw manpage for details\n" 1783 ); 1784 1785 exit(EX_USAGE); 1786 } 1787 1788 static void 1789 help(void) 1790 { 1791 1792 fprintf(stderr, "ipfw syntax summary:\n" 1793 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1794 "ipfw {pipe|queue} N config BODY\n" 1795 "ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1796 "\n" 1797 "RULE: [1..] [PROB] BODY\n" 1798 "RULENUM: INTEGER(1..65534)\n" 1799 "PROB: prob REAL(0..1)\n" 1800 "BODY: check-state [LOG] (no body) |\n" 1801 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1802 "ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1803 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1804 "ADDR: [ MAC dst src ether_type ] \n" 1805 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1806 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1807 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1808 "OPTION_LIST: OPTION [,OPTION_LIST]\n" 1809 ); 1810 exit(0); 1811 } 1812 1813 1814 static int 1815 lookup_host (char *host, struct in_addr *ipaddr) 1816 { 1817 struct hostent *he; 1818 1819 if (!inet_aton(host, ipaddr)) { 1820 if ((he = gethostbyname(host)) == NULL) 1821 return(-1); 1822 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1823 } 1824 return(0); 1825 } 1826 1827 /* 1828 * fills the addr and mask fields in the instruction as appropriate from av. 1829 * Update length as appropriate. 1830 * The following formats are allowed: 1831 * any matches any IP. Actually returns an empty instruction. 1832 * me returns O_IP_*_ME 1833 * <table_id> O_IP_*_TABLE 1834 * [iface[:net]] O_IP_*_IFIP 1835 * 1.2.3.4 single IP address 1836 * 1.2.3.4:5.6.7.8 address:mask 1837 * 1.2.3.4/24 address/mask 1838 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1839 */ 1840 static void 1841 fill_ip(ipfw_insn_ip *cmd, char *av) 1842 { 1843 char *p = NULL, md = 0; 1844 u_int32_t i; 1845 1846 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1847 1848 if (!strncmp(av, "any", strlen(av))) 1849 return; 1850 1851 if (!strncmp(av, "me", strlen(av))) { 1852 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1853 return; 1854 } 1855 1856 if (strlen(av) >= 3 && av[0] == '<' && av[strlen(av) - 1] == '>') { 1857 int pos = strlen(av) - 1; 1858 uint16_t tableid; 1859 char *eptr; 1860 1861 /* 1862 * Table: "<tableid>" 1863 */ 1864 av[pos] = '\0'; 1865 tableid = strtoul(&av[1], &eptr, 0); 1866 if (*eptr != '\0') { 1867 av[pos] = '>'; 1868 errx(EX_DATAERR, "invalid tableid ``%s''", av); 1869 } 1870 av[pos] = '>'; 1871 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1872 cmd->o.opcode = O_IP_DST_TABLE; 1873 cmd->o.arg1 = tableid; 1874 return; 1875 } 1876 1877 if (strlen(av) >= 3 && av[0] == '[' && av[strlen(av) - 1] == ']') { 1878 int pos = strlen(av) - 1; 1879 ipfw_insn_ifip *cmd1 = (ipfw_insn_ifip *)cmd; 1880 char *c; 1881 1882 /* 1883 * Interface IP: "[ifname[:net]]" 1884 */ 1885 cmd1->o.len |= F_INSN_SIZE(ipfw_insn_ifip); 1886 cmd1->o.opcode = O_IP_DST_IFIP; 1887 cmd1->o.arg1 = 0; 1888 cmd1->addr.s_addr = 0; 1889 cmd1->mask.s_addr = 0; 1890 1891 av[pos] = '\0'; 1892 c = strchr(av, ':'); 1893 if (c != NULL) { 1894 if (strcmp(c + 1, "net") == 0) { 1895 cmd1->o.arg1 |= IPFW_IFIP_NET; 1896 } else { 1897 errx(EX_DATAERR, "invalid ifname modifier: %s", 1898 c + 1); 1899 } 1900 *c = '\0'; 1901 } 1902 1903 strlcpy(cmd1->ifname, &av[1], sizeof(cmd1->ifname)); 1904 if (c != NULL) 1905 *c = ':'; 1906 av[pos] = ']'; 1907 return; 1908 } 1909 1910 p = strchr(av, '/'); 1911 if (!p) 1912 p = strchr(av, ':'); 1913 if (p) { 1914 md = *p; 1915 *p++ = '\0'; 1916 } 1917 1918 if (lookup_host(av, &cmd->addr) != 0) 1919 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1920 switch (md) { 1921 case ':': 1922 if (!inet_aton(p, &cmd->mask)) 1923 errx(EX_DATAERR, "bad netmask ``%s''", p); 1924 break; 1925 case '/': 1926 i = atoi(p); 1927 if (i == 0) 1928 cmd->mask.s_addr = htonl(0); 1929 else if (i > 32) 1930 errx(EX_DATAERR, "bad width ``%s''", p); 1931 else 1932 cmd->mask.s_addr = htonl(~0U << (32 - i)); 1933 break; 1934 default: 1935 cmd->mask.s_addr = htonl(~0); 1936 break; 1937 } 1938 cmd->addr.s_addr &= cmd->mask.s_addr; 1939 /* 1940 * now look if we have a set of addresses. They are stored as follows: 1941 * arg1 is the set size (powers of 2, 2..256) 1942 * addr is the base address IN HOST FORMAT 1943 * mask.. is an array of u_int32_t with bits set. 1944 */ 1945 if (p) 1946 p = strchr(p, '{'); 1947 if (p) { /* fetch addresses */ 1948 u_int32_t *d; 1949 int low, high; 1950 int ii = contigmask((u_char *)&(cmd->mask), 32); 1951 1952 if (ii < 24 || ii > 31) { 1953 fprintf(stderr, "invalid set with mask %d\n", 1954 ii); 1955 exit(0); 1956 } 1957 cmd->o.arg1 = 1<<(32-ii); 1958 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1959 d = (u_int32_t *)&cmd->mask; 1960 cmd->o.opcode = O_IP_DST_SET; /* default */ 1961 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1962 for (ii = 0; ii < (cmd->o.arg1+31)/32 ; ii++) 1963 d[ii] = 0; /* clear masks */ 1964 1965 av = p+1; 1966 low = cmd->addr.s_addr & 0xff; 1967 high = low + cmd->o.arg1 - 1; 1968 while (isdigit(*av)) { 1969 char *str; 1970 u_int16_t a = strtol(av, &str, 0); 1971 1972 if (str == av) /* no parameter */ 1973 break; 1974 if (a < low || a > high) { 1975 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1976 a, low, high); 1977 exit(0); 1978 } 1979 a -= low; 1980 d[ a/32] |= 1<<(a & 31); 1981 if (*str != ',') 1982 break; 1983 av = str+1; 1984 } 1985 return; 1986 } 1987 1988 if (cmd->mask.s_addr == 0) { /* any */ 1989 if (cmd->o.len & F_NOT) 1990 errx(EX_DATAERR, "not any never matches"); 1991 else /* useless, nuke it */ 1992 return; 1993 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1994 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1995 else /* addr/mask */ 1996 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1997 } 1998 1999 2000 /* 2001 * helper function to process a set of flags and set bits in the 2002 * appropriate masks. 2003 */ 2004 static void 2005 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2006 struct _s_x *flags, char *p) 2007 { 2008 u_int8_t set=0, clear=0; 2009 2010 while (p && *p) { 2011 char *q; /* points to the separator */ 2012 int val; 2013 u_int8_t *which; /* mask we are working on */ 2014 2015 if (*p == '!') { 2016 p++; 2017 which = &clear; 2018 } else 2019 which = &set; 2020 q = strchr(p, ','); 2021 if (q) 2022 *q++ = '\0'; 2023 val = match_token(flags, p); 2024 if (val <= 0) 2025 errx(EX_DATAERR, "invalid flag %s", p); 2026 *which |= (u_int8_t)val; 2027 p = q; 2028 } 2029 cmd->opcode = opcode; 2030 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2031 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2032 } 2033 2034 2035 static void 2036 delete(int ac, char *av[]) 2037 { 2038 u_int32_t rulenum; 2039 struct dn_ioc_pipe pipe; 2040 int i; 2041 int exitval = EX_OK; 2042 int do_set = 0; 2043 2044 memset(&pipe, 0, sizeof pipe); 2045 2046 av++; ac--; 2047 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 2048 do_set = 1; /* delete set */ 2049 ac--; av++; 2050 } 2051 2052 /* Rule number */ 2053 while (ac && isdigit(**av)) { 2054 i = atoi(*av); av++; ac--; 2055 if (do_pipe) { 2056 if (do_pipe == 1) 2057 pipe.pipe_nr = i; 2058 else 2059 pipe.fs.fs_nr = i; 2060 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 2061 &pipe, sizeof pipe); 2062 if (i) { 2063 exitval = 1; 2064 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2065 do_pipe == 1 ? pipe.pipe_nr : 2066 pipe.fs.fs_nr); 2067 } 2068 } else { 2069 rulenum = (i & 0xffff) | (do_set << 24); 2070 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 2071 sizeof rulenum); 2072 if (i) { 2073 exitval = EX_UNAVAILABLE; 2074 warn("rule %u: setsockopt(IP_FW_DEL)", 2075 rulenum); 2076 } 2077 } 2078 } 2079 if (exitval != EX_OK) 2080 exit(exitval); 2081 } 2082 2083 2084 /* 2085 * fill the interface structure. We do not check the name as we can 2086 * create interfaces dynamically, so checking them at insert time 2087 * makes relatively little sense. 2088 * Interface names containing '*', '?', or '[' are assumed to be shell 2089 * patterns which match interfaces. 2090 */ 2091 static void 2092 fill_iface(ipfw_insn_if *cmd, char *arg) 2093 { 2094 cmd->name[0] = '\0'; 2095 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2096 2097 /* Parse the interface or address */ 2098 if (!strcmp(arg, "any")) 2099 cmd->o.len = 0; /* effectively ignore this command */ 2100 else if (!isdigit(*arg)) { 2101 strlcpy(cmd->name, arg, sizeof(cmd->name)); 2102 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 2103 } else if (!inet_aton(arg, &cmd->p.ip)) 2104 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2105 } 2106 2107 static unsigned long 2108 getbw(const char *str, u_short *flags, int kb) 2109 { 2110 char *end; 2111 unsigned long val; 2112 int inbytes = 0; 2113 2114 val = strtoul(str, &end, 0); 2115 if (*end == 'k' || *end == 'K') { 2116 ++end; 2117 val *= kb; 2118 } else if (*end == 'm' || *end == 'M') { 2119 ++end; 2120 val *= kb * kb; 2121 } 2122 2123 /* 2124 * Deal with bits or bytes or b(bits) or B(bytes). If there is no 2125 * trailer assume bits. 2126 */ 2127 if (strncasecmp(end, "bit", 3) == 0) { 2128 ; 2129 } else if (strncasecmp(end, "byte", 4) == 0) { 2130 inbytes = 1; 2131 } else if (*end == 'b') { 2132 ; 2133 } else if (*end == 'B') { 2134 inbytes = 1; 2135 } 2136 2137 /* 2138 * Return in bits if flags is NULL, else flag bits 2139 * or bytes in flags and return the unconverted value. 2140 */ 2141 if (inbytes && flags) 2142 *flags |= DN_QSIZE_IS_BYTES; 2143 else if (inbytes && flags == NULL) 2144 val *= 8; 2145 return(val); 2146 } 2147 2148 /* 2149 * the following macro returns an error message if we run out of 2150 * arguments. 2151 */ 2152 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2153 2154 static void 2155 config_pipe(int ac, char **av) 2156 { 2157 struct dn_ioc_pipe pipe; 2158 int i; 2159 char *end; 2160 u_int32_t a; 2161 2162 memset(&pipe, 0, sizeof pipe); 2163 2164 av++; ac--; 2165 /* Pipe number */ 2166 if (ac && isdigit(**av)) { 2167 i = atoi(*av); av++; ac--; 2168 if (do_pipe == 1) 2169 pipe.pipe_nr = i; 2170 else 2171 pipe.fs.fs_nr = i; 2172 } 2173 while (ac > 0) { 2174 double d; 2175 int tok = match_token(dummynet_params, *av); 2176 ac--; av++; 2177 2178 switch(tok) { 2179 case TOK_NOERROR: 2180 pipe.fs.flags_fs |= DN_NOERROR; 2181 break; 2182 2183 case TOK_PLR: 2184 NEED1("plr needs argument 0..1\n"); 2185 d = strtod(av[0], NULL); 2186 if (d > 1) 2187 d = 1; 2188 else if (d < 0) 2189 d = 0; 2190 pipe.fs.plr = (int)(d*0x7fffffff); 2191 ac--; av++; 2192 break; 2193 2194 case TOK_QUEUE: 2195 NEED1("queue needs queue size\n"); 2196 end = NULL; 2197 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); 2198 ac--; av++; 2199 break; 2200 2201 case TOK_BUCKETS: 2202 NEED1("buckets needs argument\n"); 2203 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2204 ac--; av++; 2205 break; 2206 2207 case TOK_MASK: 2208 NEED1("mask needs mask specifier\n"); 2209 /* 2210 * per-flow queue, mask is dst_ip, dst_port, 2211 * src_ip, src_port, proto measured in bits 2212 */ 2213 2214 pipe.fs.flow_mask.type = ETHERTYPE_IP; 2215 pipe.fs.flow_mask.u.ip.dst_ip = 0; 2216 pipe.fs.flow_mask.u.ip.src_ip = 0; 2217 pipe.fs.flow_mask.u.ip.dst_port = 0; 2218 pipe.fs.flow_mask.u.ip.src_port = 0; 2219 pipe.fs.flow_mask.u.ip.proto = 0; 2220 end = NULL; 2221 2222 while (ac >= 1) { 2223 u_int32_t *p32 = NULL; 2224 u_int16_t *p16 = NULL; 2225 2226 tok = match_token(dummynet_params, *av); 2227 ac--; av++; 2228 switch(tok) { 2229 case TOK_ALL: 2230 /* 2231 * special case, all bits significant 2232 */ 2233 pipe.fs.flow_mask.u.ip.dst_ip = ~0; 2234 pipe.fs.flow_mask.u.ip.src_ip = ~0; 2235 pipe.fs.flow_mask.u.ip.dst_port = ~0; 2236 pipe.fs.flow_mask.u.ip.src_port = ~0; 2237 pipe.fs.flow_mask.u.ip.proto = ~0; 2238 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2239 goto end_mask; 2240 2241 case TOK_DSTIP: 2242 p32 = &pipe.fs.flow_mask.u.ip.dst_ip; 2243 break; 2244 2245 case TOK_SRCIP: 2246 p32 = &pipe.fs.flow_mask.u.ip.src_ip; 2247 break; 2248 2249 case TOK_DSTPORT: 2250 p16 = &pipe.fs.flow_mask.u.ip.dst_port; 2251 break; 2252 2253 case TOK_SRCPORT: 2254 p16 = &pipe.fs.flow_mask.u.ip.src_port; 2255 break; 2256 2257 case TOK_PROTO: 2258 break; 2259 2260 default: 2261 ac++; av--; /* backtrack */ 2262 goto end_mask; 2263 } 2264 if (ac < 1) 2265 errx(EX_USAGE, "mask: value missing"); 2266 if (*av[0] == '/') { 2267 a = strtoul(av[0]+1, &end, 0); 2268 a = (a == 32) ? ~0 : (1 << a) - 1; 2269 } else 2270 a = strtoul(av[0], &end, 0); 2271 if (p32 != NULL) 2272 *p32 = a; 2273 else if (p16 != NULL) { 2274 if (a > 65535) 2275 errx(EX_DATAERR, 2276 "mask: must be 16 bit"); 2277 *p16 = (u_int16_t)a; 2278 } else { 2279 if (a > 255) 2280 errx(EX_DATAERR, 2281 "mask: must be 8 bit"); 2282 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; 2283 } 2284 if (a != 0) 2285 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2286 ac--; av++; 2287 } /* end while, config masks */ 2288 end_mask: 2289 break; 2290 2291 case TOK_RED: 2292 case TOK_GRED: 2293 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2294 pipe.fs.flags_fs |= DN_IS_RED; 2295 if (tok == TOK_GRED) 2296 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2297 /* 2298 * the format for parameters is w_q/min_th/max_th/max_p 2299 */ 2300 if ((end = strsep(&av[0], "/"))) { 2301 double w_q = strtod(end, NULL); 2302 if (w_q > 1 || w_q <= 0) 2303 errx(EX_DATAERR, "0 < w_q <= 1"); 2304 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2305 } 2306 if ((end = strsep(&av[0], "/"))) { 2307 pipe.fs.min_th = strtoul(end, &end, 0); 2308 if (*end == 'K' || *end == 'k') 2309 pipe.fs.min_th *= 1024; 2310 } 2311 if ((end = strsep(&av[0], "/"))) { 2312 pipe.fs.max_th = strtoul(end, &end, 0); 2313 if (*end == 'K' || *end == 'k') 2314 pipe.fs.max_th *= 1024; 2315 } 2316 if ((end = strsep(&av[0], "/"))) { 2317 double max_p = strtod(end, NULL); 2318 if (max_p > 1 || max_p <= 0) 2319 errx(EX_DATAERR, "0 < max_p <= 1"); 2320 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2321 } 2322 ac--; av++; 2323 break; 2324 2325 case TOK_DROPTAIL: 2326 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2327 break; 2328 2329 case TOK_BW: 2330 NEED1("bw needs bandwidth\n"); 2331 if (do_pipe != 1) 2332 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2333 /* 2334 * set bandwidth value 2335 */ 2336 pipe.bandwidth = getbw(av[0], NULL, 1000); 2337 if (pipe.bandwidth < 0) 2338 errx(EX_DATAERR, "bandwidth too large"); 2339 ac--; av++; 2340 break; 2341 2342 case TOK_DELAY: 2343 if (do_pipe != 1) 2344 errx(EX_DATAERR, "delay only valid for pipes"); 2345 NEED1("delay needs argument 0..10000ms\n"); 2346 pipe.delay = strtoul(av[0], NULL, 0); 2347 ac--; av++; 2348 break; 2349 2350 case TOK_WEIGHT: 2351 if (do_pipe == 1) 2352 errx(EX_DATAERR,"weight only valid for queues"); 2353 NEED1("weight needs argument 0..100\n"); 2354 pipe.fs.weight = strtoul(av[0], &end, 0); 2355 ac--; av++; 2356 break; 2357 2358 case TOK_PIPE: 2359 if (do_pipe == 1) 2360 errx(EX_DATAERR,"pipe only valid for queues"); 2361 NEED1("pipe needs pipe_number\n"); 2362 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2363 ac--; av++; 2364 break; 2365 2366 default: 2367 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2368 } 2369 } 2370 if (do_pipe == 1) { 2371 if (pipe.pipe_nr == 0) 2372 errx(EX_DATAERR, "pipe_nr must be > 0"); 2373 if (pipe.delay > 10000) 2374 errx(EX_DATAERR, "delay must be < 10000"); 2375 } else { /* do_pipe == 2, queue */ 2376 if (pipe.fs.parent_nr == 0) 2377 errx(EX_DATAERR, "pipe must be > 0"); 2378 if (pipe.fs.weight >100) 2379 errx(EX_DATAERR, "weight must be <= 100"); 2380 } 2381 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2382 if (pipe.fs.qsize > 1024*1024) 2383 errx(EX_DATAERR, "queue size must be < 1MB"); 2384 } else { 2385 if (pipe.fs.qsize > 100) 2386 errx(EX_DATAERR, "2 <= queue size <= 100"); 2387 } 2388 if (pipe.fs.flags_fs & DN_IS_RED) { 2389 size_t len; 2390 int lookup_depth, avg_pkt_size; 2391 double step, idle, weight, w_q; 2392 int clock_hz; 2393 int t; 2394 2395 if (pipe.fs.min_th >= pipe.fs.max_th) 2396 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2397 pipe.fs.min_th, pipe.fs.max_th); 2398 if (pipe.fs.max_th == 0) 2399 errx(EX_DATAERR, "max_th must be > 0"); 2400 2401 len = sizeof(int); 2402 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2403 &lookup_depth, &len, NULL, 0) == -1) 2404 2405 errx(1, "sysctlbyname(\"%s\")", 2406 "net.inet.ip.dummynet.red_lookup_depth"); 2407 if (lookup_depth == 0) 2408 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2409 " must be greater than zero"); 2410 2411 len = sizeof(int); 2412 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2413 &avg_pkt_size, &len, NULL, 0) == -1) 2414 2415 errx(1, "sysctlbyname(\"%s\")", 2416 "net.inet.ip.dummynet.red_avg_pkt_size"); 2417 if (avg_pkt_size == 0) 2418 errx(EX_DATAERR, 2419 "net.inet.ip.dummynet.red_avg_pkt_size must" 2420 " be greater than zero"); 2421 2422 len = sizeof(clock_hz); 2423 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, 2424 NULL, 0) == -1) { 2425 errx(1, "sysctlbyname(\"%s\")", 2426 "net.inet.ip.dummynet.hz"); 2427 } 2428 2429 /* 2430 * Ticks needed for sending a medium-sized packet. 2431 * Unfortunately, when we are configuring a WF2Q+ queue, we 2432 * do not have bandwidth information, because that is stored 2433 * in the parent pipe, and also we have multiple queues 2434 * competing for it. So we set step=0, which is not very 2435 * correct. But on the other hand, why do we want RED with 2436 * WF2Q+ ? 2437 */ 2438 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2439 step = 0; 2440 else 2441 step = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; 2442 2443 /* 2444 * max idle time (in ticks) before avg queue size becomes 0. 2445 * NOTA: (3/w_q) is approx the value x so that 2446 * (1-w_q)^x < 10^-3. 2447 */ 2448 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2449 idle = step * 3. / w_q; 2450 pipe.fs.lookup_step = (int)idle / lookup_depth; 2451 if (!pipe.fs.lookup_step) 2452 pipe.fs.lookup_step = 1; 2453 weight = 1 - w_q; 2454 for (t = pipe.fs.lookup_step; t > 0; --t) 2455 weight *= weight; 2456 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2457 } 2458 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2459 sizeof pipe); 2460 if (i) 2461 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2462 } 2463 2464 static void 2465 get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2466 { 2467 int i, l; 2468 2469 for (i=0; i<6; i++) 2470 addr[i] = mask[i] = 0; 2471 if (!strcmp(p, "any")) 2472 return; 2473 2474 for (i=0; *p && i<6;i++, p++) { 2475 addr[i] = strtol(p, &p, 16); 2476 if (*p != ':') /* we start with the mask */ 2477 break; 2478 } 2479 if (*p == '/') { /* mask len */ 2480 l = strtol(p+1, &p, 0); 2481 for (i=0; l>0; l -=8, i++) 2482 mask[i] = (l >=8) ? 0xff : (~0U) << (8-l); 2483 } else if (*p == '&') { /* mask */ 2484 for (i=0, p++; *p && i<6;i++, p++) { 2485 mask[i] = strtol(p, &p, 16); 2486 if (*p != ':') 2487 break; 2488 } 2489 } else if (*p == '\0') { 2490 for (i=0; i<6; i++) 2491 mask[i] = 0xff; 2492 } 2493 for (i=0; i<6; i++) 2494 addr[i] &= mask[i]; 2495 } 2496 2497 /* 2498 * helper function, updates the pointer to cmd with the length 2499 * of the current command, and also cleans up the first word of 2500 * the new command in case it has been clobbered before. 2501 */ 2502 static ipfw_insn * 2503 next_cmd(ipfw_insn *cmd) 2504 { 2505 cmd += F_LEN(cmd); 2506 bzero(cmd, sizeof(*cmd)); 2507 return cmd; 2508 } 2509 2510 /* 2511 * A function to fill simple commands of size 1. 2512 * Existing flags are preserved. 2513 */ 2514 static void 2515 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2516 { 2517 cmd->opcode = opcode; 2518 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2519 cmd->arg1 = arg; 2520 } 2521 2522 /* 2523 * Fetch and add the MAC address and type, with masks. This generates one or 2524 * two microinstructions, and returns the pointer to the last one. 2525 */ 2526 static ipfw_insn * 2527 add_mac(ipfw_insn *cmd, int ac, char *av[]) 2528 { 2529 ipfw_insn_mac *mac; 2530 2531 if (ac < 2) 2532 errx(EX_DATAERR, "MAC dst src"); 2533 2534 cmd->opcode = O_MACADDR2; 2535 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2536 2537 mac = (ipfw_insn_mac *)cmd; 2538 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2539 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2540 return cmd; 2541 } 2542 2543 static ipfw_insn * 2544 add_mactype(ipfw_insn *cmd, int ac, char *av) 2545 { 2546 if (ac < 1) 2547 errx(EX_DATAERR, "missing MAC type"); 2548 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2549 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2550 cmd->opcode = O_MAC_TYPE; 2551 return cmd; 2552 } else 2553 return NULL; 2554 } 2555 2556 static ipfw_insn * 2557 add_proto(ipfw_insn *cmd, char *av) 2558 { 2559 struct protoent *pe; 2560 u_char proto = 0; 2561 2562 if (!strncmp(av, "all", strlen(av))) 2563 ; /* same as "ip" */ 2564 else if ((proto = atoi(av)) > 0) 2565 ; /* all done! */ 2566 else if ((pe = getprotobyname(av)) != NULL) 2567 proto = pe->p_proto; 2568 else 2569 return NULL; 2570 if (proto != IPPROTO_IP) 2571 fill_cmd(cmd, O_PROTO, 0, proto); 2572 return cmd; 2573 } 2574 2575 static ipfw_insn * 2576 add_srcip(ipfw_insn *cmd, char *av) 2577 { 2578 fill_ip((ipfw_insn_ip *)cmd, av); 2579 if (cmd->opcode == O_IP_DST_SET) /* set */ 2580 cmd->opcode = O_IP_SRC_SET; 2581 else if (cmd->opcode == O_IP_DST_TABLE) /* table */ 2582 cmd->opcode = O_IP_SRC_TABLE; 2583 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */ 2584 cmd->opcode = O_IP_SRC_IFIP; 2585 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2586 cmd->opcode = O_IP_SRC_ME; 2587 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2588 cmd->opcode = O_IP_SRC; 2589 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2590 cmd->opcode = O_IP_SRC_MASK; 2591 return cmd; 2592 } 2593 2594 static ipfw_insn * 2595 add_dstip(ipfw_insn *cmd, char *av) 2596 { 2597 fill_ip((ipfw_insn_ip *)cmd, av); 2598 if (cmd->opcode == O_IP_DST_SET) /* set */ 2599 ; 2600 else if (cmd->opcode == O_IP_DST_TABLE) /* table */ 2601 ; 2602 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */ 2603 ; 2604 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2605 cmd->opcode = O_IP_DST_ME; 2606 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2607 cmd->opcode = O_IP_DST; 2608 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2609 cmd->opcode = O_IP_DST_MASK; 2610 return cmd; 2611 } 2612 2613 static ipfw_insn * 2614 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2615 { 2616 if (!strncmp(av, "any", strlen(av))) { 2617 return NULL; 2618 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2619 /* XXX todo: check that we have a protocol with ports */ 2620 cmd->opcode = opcode; 2621 return cmd; 2622 } 2623 return NULL; 2624 } 2625 2626 static void 2627 fill_rdr(ipfw_insn *cmd, char *av) 2628 { 2629 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd; 2630 char *p; 2631 2632 cmd->opcode = O_REDIRECT; 2633 cmd->len = F_INSN_SIZE(ipfw_insn_rdr); 2634 cmd->arg1 = 0; 2635 c->addr.s_addr = INADDR_ANY; 2636 c->port = 0; 2637 c->set = UINT16_MAX; 2638 2639 p = strchr(av, ','); 2640 if (p == NULL) 2641 p = strchr(av, ':'); 2642 if (p != NULL) 2643 *p = '\0'; 2644 lookup_host(av, &c->addr); 2645 2646 if (p != NULL && *(p + 1) != '\0') { 2647 char *ep; 2648 2649 c->port = strtoul(p + 1, &ep, 0); 2650 if (*ep != '\0') 2651 errx(EX_DATAERR, "illegal port %s", p + 1); 2652 c->port = htons(c->port); 2653 } 2654 } 2655 2656 /* 2657 * Parse arguments and assemble the microinstructions which make up a rule. 2658 * Rules are added into the 'rulebuf' and then copied in the correct order 2659 * into the actual rule. 2660 * 2661 * The syntax for a rule starts with the action, followed by an 2662 * optional log action, and the various match patterns. 2663 * In the assembled microcode, the first opcode must be a O_PROBE_STATE 2664 * (generated if the rule includes a keep-state option), then the 2665 * various match patterns, the "log" action, and the actual action. 2666 * 2667 */ 2668 static void 2669 add(int ac, char *av[]) 2670 { 2671 /* 2672 * rules are added into the 'rulebuf' and then copied in 2673 * the correct order into the actual rule. 2674 * Some things that need to go out of order (prob, action etc.) 2675 * go into actbuf[]. 2676 */ 2677 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX]; 2678 static uint32_t actbuf[IPFW_RULE_SIZE_MAX]; 2679 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX]; 2680 2681 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; 2682 ipfw_insn *first_cmd; /* first match pattern */ 2683 2684 struct ipfw_ioc_rule *rule; 2685 2686 /* 2687 * various flags used to record that we entered some fields. 2688 */ 2689 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2690 2691 int i; 2692 2693 int open_par = 0; /* open parenthesis ( */ 2694 2695 int has_dstport = 0; 2696 int has_recv = 0; 2697 2698 /* proto is here because it is used to fetch ports */ 2699 u_char proto = IPPROTO_IP; /* default protocol */ 2700 2701 double match_prob = 1; /* match probability, default is always match */ 2702 2703 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2704 bzero(cmdbuf, sizeof(cmdbuf)); 2705 bzero(rulebuf, sizeof(rulebuf)); 2706 2707 rule = (struct ipfw_ioc_rule *)rulebuf; 2708 cmd = (ipfw_insn *)cmdbuf; 2709 action = (ipfw_insn *)actbuf; 2710 2711 av++; ac--; 2712 2713 /* [rule N] -- Rule number optional */ 2714 if (ac && isdigit(**av)) { 2715 rule->rulenum = atoi(*av); 2716 av++; 2717 ac--; 2718 } 2719 2720 /* [set N] -- set number (0..30), optional */ 2721 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2722 int set = strtoul(av[1], NULL, 10); 2723 if (set < 0 || set > 30) 2724 errx(EX_DATAERR, "illegal set %s", av[1]); 2725 rule->set = set; 2726 av += 2; ac -= 2; 2727 } 2728 2729 /* [prob D] -- match probability, optional */ 2730 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2731 match_prob = strtod(av[1], NULL); 2732 2733 if (match_prob <= 0 || match_prob > 1) 2734 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2735 av += 2; ac -= 2; 2736 } 2737 2738 /* action -- mandatory */ 2739 NEED1("missing action"); 2740 i = match_token(rule_actions, *av); 2741 ac--; av++; 2742 action->len = 1; /* default */ 2743 switch(i) { 2744 case TOK_CHECKSTATE: 2745 have_state = action; 2746 action->opcode = O_CHECK_STATE; 2747 break; 2748 2749 case TOK_ACCEPT: 2750 action->opcode = O_ACCEPT; 2751 break; 2752 2753 case TOK_DEFRAG: 2754 action->opcode = O_DEFRAG; 2755 action->arg1 = 0; 2756 break; 2757 2758 case TOK_DENY: 2759 action->opcode = O_DENY; 2760 action->arg1 = 0; 2761 break; 2762 2763 case TOK_REJECT: 2764 action->opcode = O_REJECT; 2765 action->arg1 = ICMP_UNREACH_HOST; 2766 break; 2767 2768 case TOK_RESET: 2769 action->opcode = O_REJECT; 2770 action->arg1 = ICMP_REJECT_RST; 2771 break; 2772 2773 case TOK_UNREACH: 2774 action->opcode = O_REJECT; 2775 NEED1("missing reject code"); 2776 fill_reject_code(&action->arg1, *av); 2777 ac--; av++; 2778 break; 2779 2780 case TOK_COUNT: 2781 action->opcode = O_COUNT; 2782 break; 2783 2784 case TOK_QUEUE: 2785 case TOK_PIPE: 2786 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2787 /* FALLTHROUGH */ 2788 case TOK_SKIPTO: 2789 if (i == TOK_QUEUE) 2790 action->opcode = O_QUEUE; 2791 else if (i == TOK_PIPE) 2792 action->opcode = O_PIPE; 2793 else if (i == TOK_SKIPTO) 2794 action->opcode = O_SKIPTO; 2795 NEED1("missing skipto/pipe/queue number"); 2796 action->arg1 = strtoul(*av, NULL, 10); 2797 av++; ac--; 2798 break; 2799 2800 case TOK_DIVERT: 2801 case TOK_TEE: 2802 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2803 NEED1("missing divert/tee port"); 2804 action->arg1 = strtoul(*av, NULL, 0); 2805 if (action->arg1 == 0) { 2806 struct servent *serv; 2807 setservent(1); 2808 serv = getservbyname(av[0], "divert"); 2809 if (serv != NULL) 2810 action->arg1 = ntohs(serv->s_port); 2811 else 2812 errx(EX_DATAERR, "illegal divert/tee port"); 2813 } 2814 ac--; av++; 2815 break; 2816 2817 case TOK_FORWARD: { 2818 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2819 char *st, *end; 2820 2821 NEED1("missing forward address[:port]"); 2822 2823 action->opcode = O_FORWARD_IP; 2824 action->len = F_INSN_SIZE(ipfw_insn_sa); 2825 2826 p->sa.sin_len = sizeof(struct sockaddr_in); 2827 p->sa.sin_family = AF_INET; 2828 p->sa.sin_port = 0; 2829 /* 2830 * locate the address-port separator (':' or ',') 2831 */ 2832 st = strchr(*av, ':'); 2833 if (st == NULL) 2834 st = strchr(*av, ','); 2835 if (st != NULL) { 2836 *(st++) = '\0'; 2837 i = strtoport(st, &end, 0 /* base */, 0 /* proto */); 2838 if (st == end) 2839 errx(EX_DATAERR, 2840 "illegal forwarding port ``%s''", st); 2841 p->sa.sin_port = (u_short)i; 2842 } 2843 lookup_host(*av, &(p->sa.sin_addr)); 2844 } 2845 ac--; av++; 2846 break; 2847 2848 default: 2849 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2850 } 2851 action = next_cmd(action); 2852 2853 /* 2854 * [log [logamount N]] -- log, optional 2855 * 2856 * If exists, it goes first in the cmdbuf, but then it is 2857 * skipped in the copy section to the end of the buffer. 2858 */ 2859 if (ac && !strncmp(*av, "log", strlen(*av))) { 2860 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2861 2862 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2863 cmd->opcode = O_LOG; 2864 av++; ac--; 2865 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2866 ac--; av++; 2867 NEED1("logamount requires argument"); 2868 c->max_log = atoi(*av); 2869 ac--; av++; 2870 } 2871 cmd = next_cmd(cmd); 2872 } 2873 2874 if (have_state) /* must be a check-state, we are done */ 2875 goto done; 2876 2877 #define OR_START(target) \ 2878 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2879 if (open_par) \ 2880 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2881 prev = NULL; \ 2882 open_par = 1; \ 2883 if ( (av[0])[1] == '\0') { \ 2884 ac--; av++; \ 2885 } else \ 2886 (*av)++; \ 2887 } \ 2888 target: \ 2889 2890 2891 #define CLOSE_PAR \ 2892 if (open_par) { \ 2893 if (ac && ( \ 2894 !strncmp(*av, ")", strlen(*av)) || \ 2895 !strncmp(*av, "}", strlen(*av)) )) { \ 2896 prev = NULL; \ 2897 open_par = 0; \ 2898 ac--; av++; \ 2899 } else \ 2900 errx(EX_USAGE, "missing \")\"\n"); \ 2901 } 2902 2903 #define NOT_BLOCK \ 2904 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2905 if (cmd->len & F_NOT) \ 2906 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2907 cmd->len |= F_NOT; \ 2908 ac--; av++; \ 2909 } 2910 2911 #define OR_BLOCK(target) \ 2912 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2913 if (prev == NULL || open_par == 0) \ 2914 errx(EX_DATAERR, "invalid OR block"); \ 2915 prev->len |= F_OR; \ 2916 ac--; av++; \ 2917 goto target; \ 2918 } \ 2919 CLOSE_PAR; 2920 2921 first_cmd = cmd; 2922 2923 #if 0 2924 /* 2925 * MAC addresses, optional. 2926 * If we have this, we skip the part "proto from src to dst" 2927 * and jump straight to the option parsing. 2928 */ 2929 NOT_BLOCK; 2930 NEED1("missing protocol"); 2931 if (!strncmp(*av, "MAC", strlen(*av)) || 2932 !strncmp(*av, "mac", strlen(*av))) { 2933 ac--; av++; /* the "MAC" keyword */ 2934 add_mac(cmd, ac, av); /* exits in case of errors */ 2935 cmd = next_cmd(cmd); 2936 ac -= 2; av += 2; /* dst-mac and src-mac */ 2937 NOT_BLOCK; 2938 NEED1("missing mac type"); 2939 if (add_mactype(cmd, ac, av[0])) 2940 cmd = next_cmd(cmd); 2941 ac--; av++; /* any or mac-type */ 2942 goto read_options; 2943 } 2944 #endif 2945 2946 /* 2947 * protocol, mandatory 2948 */ 2949 OR_START(get_proto); 2950 NOT_BLOCK; 2951 NEED1("missing protocol"); 2952 if (add_proto(cmd, *av)) { 2953 av++; ac--; 2954 if (F_LEN(cmd) == 0) /* plain IP */ 2955 proto = 0; 2956 else { 2957 proto = cmd->arg1; 2958 prev = cmd; 2959 cmd = next_cmd(cmd); 2960 } 2961 } else if (first_cmd != cmd) { 2962 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2963 } else 2964 goto read_options; 2965 OR_BLOCK(get_proto); 2966 2967 /* 2968 * "from", mandatory 2969 */ 2970 if (!ac || strncmp(*av, "from", strlen(*av))) 2971 errx(EX_USAGE, "missing ``from''"); 2972 ac--; av++; 2973 2974 /* 2975 * source IP, mandatory 2976 */ 2977 OR_START(source_ip); 2978 NOT_BLOCK; /* optional "not" */ 2979 NEED1("missing source address"); 2980 if (add_srcip(cmd, *av)) { 2981 ac--; av++; 2982 if (F_LEN(cmd) != 0) { /* ! any */ 2983 prev = cmd; 2984 cmd = next_cmd(cmd); 2985 } 2986 } 2987 OR_BLOCK(source_ip); 2988 2989 /* 2990 * source ports, optional 2991 */ 2992 NOT_BLOCK; /* optional "not" */ 2993 if (ac) { 2994 if (!strncmp(*av, "any", strlen(*av)) || 2995 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2996 ac--; av++; 2997 if (F_LEN(cmd) != 0) 2998 cmd = next_cmd(cmd); 2999 } 3000 } 3001 3002 /* 3003 * "to", mandatory 3004 */ 3005 if (!ac || strncmp(*av, "to", strlen(*av))) 3006 errx(EX_USAGE, "missing ``to''"); 3007 av++; ac--; 3008 3009 /* 3010 * destination, mandatory 3011 */ 3012 OR_START(dest_ip); 3013 NOT_BLOCK; /* optional "not" */ 3014 NEED1("missing dst address"); 3015 if (add_dstip(cmd, *av)) { 3016 ac--; av++; 3017 if (F_LEN(cmd) != 0) { /* ! any */ 3018 prev = cmd; 3019 cmd = next_cmd(cmd); 3020 } 3021 } 3022 OR_BLOCK(dest_ip); 3023 3024 /* 3025 * dest. ports, optional 3026 */ 3027 NOT_BLOCK; /* optional "not" */ 3028 if (ac) { 3029 if (!strncmp(*av, "any", strlen(*av)) || 3030 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3031 ac--; av++; 3032 if (F_LEN(cmd) != 0) { 3033 has_dstport = 1; 3034 cmd = next_cmd(cmd); 3035 } 3036 } 3037 } 3038 3039 read_options: 3040 if (ac && first_cmd == cmd) { 3041 /* 3042 * nothing specified so far, store in the rule to ease 3043 * printout later. 3044 */ 3045 rule->usr_flags = IPFW_USR_F_NORULE; 3046 } 3047 prev = NULL; 3048 while (ac) { 3049 char *s1; 3050 ipfw_insn_u32 *cmd32; /* alias for cmd */ 3051 3052 s1 = *av; 3053 cmd32 = (ipfw_insn_u32 *)cmd; 3054 3055 if (*s1 == '!') { /* alternate syntax for NOT */ 3056 if (cmd->len & F_NOT) 3057 errx(EX_USAGE, "double \"not\" not allowed\n"); 3058 cmd->len = F_NOT; 3059 s1++; 3060 } 3061 i = match_token(rule_options, s1); 3062 ac--; av++; 3063 switch(i) { 3064 case TOK_NOT: 3065 if (cmd->len & F_NOT) 3066 errx(EX_USAGE, "double \"not\" not allowed\n"); 3067 cmd->len = F_NOT; 3068 break; 3069 3070 case TOK_OR: 3071 if (open_par == 0 || prev == NULL) 3072 errx(EX_USAGE, "invalid \"or\" block\n"); 3073 prev->len |= F_OR; 3074 break; 3075 3076 case TOK_STARTBRACE: 3077 if (open_par) 3078 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 3079 open_par = 1; 3080 break; 3081 3082 case TOK_ENDBRACE: 3083 if (!open_par) 3084 errx(EX_USAGE, "+missing \")\"\n"); 3085 open_par = 0; 3086 prev = NULL; 3087 break; 3088 3089 case TOK_IN: 3090 fill_cmd(cmd, O_IN, 0, 0); 3091 break; 3092 3093 case TOK_OUT: 3094 cmd->len ^= F_NOT; /* toggle F_NOT */ 3095 fill_cmd(cmd, O_IN, 0, 0); 3096 break; 3097 3098 case TOK_FRAG: 3099 fill_cmd(cmd, O_FRAG, 0, 0); 3100 break; 3101 3102 case TOK_IPFRAG: 3103 fill_cmd(cmd, O_IPFRAG, 0, 0); 3104 break; 3105 3106 case TOK_LAYER2: 3107 fill_cmd(cmd, O_LAYER2, 0, 0); 3108 break; 3109 3110 case TOK_XMIT: 3111 case TOK_RECV: 3112 case TOK_VIA: 3113 NEED1("recv, xmit, via require interface name" 3114 " or address"); 3115 fill_iface((ipfw_insn_if *)cmd, av[0]); 3116 ac--; av++; 3117 if (F_LEN(cmd) == 0) /* not a valid address */ 3118 break; 3119 if (i == TOK_XMIT) 3120 cmd->opcode = O_XMIT; 3121 else if (i == TOK_RECV) { 3122 cmd->opcode = O_RECV; 3123 has_recv = 1; 3124 } else if (i == TOK_VIA) 3125 cmd->opcode = O_VIA; 3126 break; 3127 3128 case TOK_ICMPCODES: 3129 NEED1("icmpcodes requires list of codes"); 3130 fill_icmp(O_ICMPCODE, (ipfw_insn_u32 *)cmd, *av); 3131 av++; ac--; 3132 break; 3133 3134 case TOK_ICMPTYPES: 3135 NEED1("icmptypes requires list of types"); 3136 fill_icmp(O_ICMPTYPE, (ipfw_insn_u32 *)cmd, *av); 3137 av++; ac--; 3138 break; 3139 3140 case TOK_IPTTL: 3141 NEED1("ipttl requires TTL"); 3142 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3143 ac--; av++; 3144 break; 3145 3146 case TOK_IPID: 3147 NEED1("ipid requires length"); 3148 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3149 ac--; av++; 3150 break; 3151 3152 case TOK_IPLEN: 3153 NEED1("iplen requires length"); 3154 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3155 ac--; av++; 3156 break; 3157 3158 case TOK_IPVER: 3159 NEED1("ipver requires version"); 3160 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3161 ac--; av++; 3162 break; 3163 3164 case TOK_IPPRECEDENCE: 3165 NEED1("ipprecedence requires value"); 3166 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3167 (strtoul(*av, NULL, 0) & 7) << 5); 3168 ac--; av++; 3169 break; 3170 3171 case TOK_IPOPTS: 3172 NEED1("missing argument for ipoptions"); 3173 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3174 ac--; av++; 3175 break; 3176 3177 case TOK_IPTOS: 3178 NEED1("missing argument for iptos"); 3179 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3180 ac--; av++; 3181 break; 3182 3183 case TOK_UID: 3184 NEED1("uid requires argument"); 3185 { 3186 char *end; 3187 uid_t uid; 3188 struct passwd *pwd; 3189 3190 cmd->opcode = O_UID; 3191 uid = strtoul(*av, &end, 0); 3192 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3193 if (pwd == NULL) 3194 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3195 cmd32->d[0] = pwd->pw_uid; 3196 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3197 ac--; av++; 3198 } 3199 break; 3200 3201 case TOK_GID: 3202 NEED1("gid requires argument"); 3203 { 3204 char *end; 3205 gid_t gid; 3206 struct group *grp; 3207 3208 cmd->opcode = O_GID; 3209 gid = strtoul(*av, &end, 0); 3210 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3211 if (grp == NULL) 3212 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3213 cmd32->d[0] = grp->gr_gid; 3214 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3215 ac--; av++; 3216 } 3217 break; 3218 3219 case TOK_ESTAB: 3220 fill_cmd(cmd, O_ESTAB, 0, 0); 3221 break; 3222 3223 case TOK_SETUP: 3224 fill_cmd(cmd, O_TCPFLAGS, 0, 3225 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3226 break; 3227 3228 case TOK_TCPOPTS: 3229 NEED1("missing argument for tcpoptions"); 3230 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3231 ac--; av++; 3232 break; 3233 3234 case TOK_TCPSEQ: 3235 case TOK_TCPACK: 3236 NEED1("tcpseq/tcpack requires argument"); 3237 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3238 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3239 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3240 ac--; av++; 3241 break; 3242 3243 case TOK_TCPWIN: 3244 NEED1("tcpwin requires length"); 3245 fill_cmd(cmd, O_TCPWIN, 0, 3246 htons(strtoul(*av, NULL, 0))); 3247 ac--; av++; 3248 break; 3249 3250 case TOK_TCPFLAGS: 3251 NEED1("missing argument for tcpflags"); 3252 cmd->opcode = O_TCPFLAGS; 3253 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3254 ac--; av++; 3255 break; 3256 3257 case TOK_REDIRECT: 3258 if (open_par) 3259 errx(EX_USAGE, "rdr cannot be part " 3260 "of an or block"); 3261 if (have_state) { 3262 errx(EX_USAGE, "only one of rdr, keep-state " 3263 "and limit is allowed"); 3264 } 3265 have_state = cmd; 3266 NEED1("rdr needs address and port"); 3267 fill_rdr(cmd, *av); 3268 ac--; av++; 3269 break; 3270 3271 case TOK_KEEPSTATE: 3272 if (open_par) 3273 errx(EX_USAGE, "keep-state cannot be part " 3274 "of an or block"); 3275 if (have_state) { 3276 errx(EX_USAGE, "only one of rdr, keep-state " 3277 "and limit is allowed"); 3278 } 3279 have_state = cmd; 3280 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3281 break; 3282 3283 case TOK_LIMIT: 3284 if (open_par) 3285 errx(EX_USAGE, "limit cannot be part " 3286 "of an or block"); 3287 if (have_state) { 3288 errx(EX_USAGE, "only one of rdr, keep-state " 3289 "and limit is allowed"); 3290 } 3291 NEED1("limit needs mask and # of connections"); 3292 have_state = cmd; 3293 { 3294 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3295 3296 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3297 cmd->opcode = O_LIMIT; 3298 c->limit_mask = 0; 3299 c->conn_limit = 0; 3300 for (; ac >1 ;) { 3301 int val; 3302 3303 val = match_token(limit_masks, *av); 3304 if (val <= 0) 3305 break; 3306 c->limit_mask |= val; 3307 ac--; av++; 3308 } 3309 c->conn_limit = atoi(*av); 3310 if (c->conn_limit == 0) 3311 errx(EX_USAGE, "limit: limit must be >0"); 3312 if (c->limit_mask == 0) 3313 errx(EX_USAGE, "missing limit mask"); 3314 ac--; av++; 3315 } 3316 break; 3317 3318 case TOK_PROTO: 3319 NEED1("missing protocol"); 3320 if (add_proto(cmd, *av)) { 3321 proto = cmd->arg1; 3322 ac--; av++; 3323 } else 3324 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3325 break; 3326 3327 case TOK_SRCIP: 3328 NEED1("missing source IP"); 3329 if (add_srcip(cmd, *av)) { 3330 ac--; av++; 3331 } 3332 break; 3333 3334 case TOK_DSTIP: 3335 NEED1("missing destination IP"); 3336 if (add_dstip(cmd, *av)) { 3337 ac--; av++; 3338 } 3339 break; 3340 3341 case TOK_SRCPORT: 3342 NEED1("missing source port"); 3343 if (!strncmp(*av, "any", strlen(*av)) || 3344 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3345 ac--; av++; 3346 } else 3347 errx(EX_DATAERR, "invalid source port %s", *av); 3348 break; 3349 3350 case TOK_DSTPORT: 3351 NEED1("missing destination port"); 3352 if (!strncmp(*av, "any", strlen(*av)) || 3353 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3354 if (F_LEN(cmd) != 0) 3355 has_dstport =1; 3356 ac--; av++; 3357 } else 3358 errx(EX_DATAERR, "invalid destination port %s", 3359 *av); 3360 break; 3361 3362 case TOK_MAC: 3363 if (ac < 2) 3364 errx(EX_USAGE, "MAC dst-mac src-mac"); 3365 if (add_mac(cmd, ac, av)) { 3366 ac -= 2; av += 2; 3367 } 3368 break; 3369 3370 case TOK_MACTYPE: 3371 NEED1("missing mac type"); 3372 if (!add_mactype(cmd, ac, *av)) 3373 errx(EX_DATAERR, "invalid mac type %s", *av); 3374 ac--; av++; 3375 break; 3376 3377 default: 3378 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s1); 3379 } 3380 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3381 prev = cmd; 3382 cmd = next_cmd(cmd); 3383 } 3384 } 3385 3386 done: 3387 /* 3388 * Now copy stuff into the rule. 3389 * If we have a keep-state option, the first instruction 3390 * must be a PROBE_STATE (which is generated here). 3391 * If we have a LOG option, it was stored as the first command, 3392 * and now must be moved to the top of the action part. 3393 */ 3394 dst = (ipfw_insn *)rule->cmd; 3395 3396 /* 3397 * First thing to write into the command stream is the match probability. 3398 */ 3399 if (match_prob != 1) { /* 1 means always match */ 3400 dst->opcode = O_PROB; 3401 dst->len = 2; 3402 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3403 dst += dst->len; 3404 } 3405 3406 /* 3407 * generate O_PROBE_STATE if necessary 3408 */ 3409 if (have_state && have_state->opcode != O_CHECK_STATE) { 3410 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3411 dst = next_cmd(dst); 3412 } 3413 /* 3414 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_REDIRECT 3415 */ 3416 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3417 i = F_LEN(src); 3418 3419 switch (src->opcode) { 3420 case O_LOG: 3421 case O_KEEP_STATE: 3422 case O_LIMIT: 3423 case O_REDIRECT: 3424 break; 3425 default: 3426 bcopy(src, dst, i * sizeof(u_int32_t)); 3427 dst += i; 3428 } 3429 } 3430 3431 /* 3432 * put back the have_state command as last opcode 3433 */ 3434 if (have_state && have_state->opcode != O_CHECK_STATE) { 3435 i = F_LEN(have_state); 3436 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3437 dst += i; 3438 3439 if (have_state->opcode == O_REDIRECT && 3440 (!has_dstport || !has_recv)) 3441 errx(EX_USAGE, "missing \'dst-port\' or \'recv\'"); 3442 } 3443 /* 3444 * start action section 3445 */ 3446 rule->act_ofs = dst - rule->cmd; 3447 3448 /* 3449 * put back O_LOG if necessary 3450 */ 3451 src = (ipfw_insn *)cmdbuf; 3452 if ( src->opcode == O_LOG ) { 3453 i = F_LEN(src); 3454 bcopy(src, dst, i * sizeof(u_int32_t)); 3455 dst += i; 3456 } 3457 /* 3458 * copy all other actions 3459 */ 3460 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3461 i = F_LEN(src); 3462 bcopy(src, dst, i * sizeof(u_int32_t)); 3463 dst += i; 3464 } 3465 3466 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3467 i = (uint8_t *)dst - (uint8_t *)rule; 3468 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3469 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3470 if (!do_quiet) 3471 show_ipfw(rule, 10, 10); 3472 } 3473 3474 static void 3475 zero(int ac, char *av[]) 3476 { 3477 int rulenum; 3478 int failed = EX_OK; 3479 3480 av++; ac--; 3481 3482 if (!ac) { 3483 /* clear all entries */ 3484 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3485 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3486 if (!do_quiet) 3487 printf("Accounting cleared.\n"); 3488 3489 return; 3490 } 3491 3492 while (ac) { 3493 /* Rule number */ 3494 if (isdigit(**av)) { 3495 rulenum = atoi(*av); 3496 av++; 3497 ac--; 3498 if (setsockopt(s, IPPROTO_IP, 3499 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3500 warn("rule %u: setsockopt(IP_FW_ZERO)", 3501 rulenum); 3502 failed = EX_UNAVAILABLE; 3503 } else if (!do_quiet) 3504 printf("Entry %d cleared\n", rulenum); 3505 } else { 3506 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3507 } 3508 } 3509 if (failed != EX_OK) 3510 exit(failed); 3511 } 3512 3513 static void 3514 resetlog(int ac, char *av[]) 3515 { 3516 int rulenum; 3517 int failed = EX_OK; 3518 3519 av++; ac--; 3520 3521 if (!ac) { 3522 /* clear all entries */ 3523 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3524 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3525 if (!do_quiet) 3526 printf("Logging counts reset.\n"); 3527 3528 return; 3529 } 3530 3531 while (ac) { 3532 /* Rule number */ 3533 if (isdigit(**av)) { 3534 rulenum = atoi(*av); 3535 av++; 3536 ac--; 3537 if (setsockopt(s, IPPROTO_IP, 3538 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3539 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3540 rulenum); 3541 failed = EX_UNAVAILABLE; 3542 } else if (!do_quiet) 3543 printf("Entry %d logging count reset\n", 3544 rulenum); 3545 } else { 3546 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3547 } 3548 } 3549 if (failed != EX_OK) 3550 exit(failed); 3551 } 3552 3553 static void 3554 flush(void) 3555 { 3556 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3557 3558 if (!do_force && !do_quiet) { /* need to ask user */ 3559 int c; 3560 3561 printf("Are you sure? [yn] "); 3562 fflush(stdout); 3563 do { 3564 c = toupper(getc(stdin)); 3565 while (c != '\n' && getc(stdin) != '\n') 3566 if (feof(stdin)) 3567 return; /* and do not flush */ 3568 } while (c != 'Y' && c != 'N'); 3569 printf("\n"); 3570 if (c == 'N') /* user said no */ 3571 return; 3572 } 3573 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3574 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3575 do_pipe ? "DUMMYNET" : "FW"); 3576 if (!do_quiet) 3577 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3578 } 3579 3580 static void 3581 table_create(int ac, char **av) 3582 { 3583 struct ipfw_ioc_table tbl; 3584 char *eptr; 3585 3586 ac--; 3587 av++; 3588 3589 if (ac == 0) 3590 errx(EX_DATAERR, "missing table id"); 3591 3592 memset(&tbl, 0, sizeof(tbl)); 3593 tbl.tableid = strtoul(*av, &eptr, 0); 3594 if (*eptr != '\0') 3595 errx(EX_DATAERR, "invalid table id %s", *av); 3596 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_CREATE, &tbl, sizeof(tbl)) < 0) 3597 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_CREATE)"); 3598 if (!do_quiet) 3599 printf("Created table %d\n", tbl.tableid); 3600 } 3601 3602 static void 3603 table_flush(int ac, char **av, int opt) 3604 { 3605 struct ipfw_ioc_table tbl; 3606 char *eptr; 3607 3608 ac--; 3609 av++; 3610 3611 memset(&tbl, 0, sizeof(tbl)); 3612 3613 if (ac == 0) { 3614 if (opt == IP_FW_TBL_FLUSH) { 3615 /* Flush all tables */ 3616 tbl.tableid = -1; 3617 goto flush; 3618 } 3619 errx(EX_DATAERR, "missing table id"); 3620 } 3621 3622 tbl.tableid = strtoul(*av, &eptr, 0); 3623 if (*eptr != '\0') 3624 errx(EX_DATAERR, "invalid table id %s", *av); 3625 3626 flush: 3627 if (!do_force && !do_quiet) { /* need to ask user */ 3628 int c; 3629 3630 printf("Are you sure? [yn] "); 3631 fflush(stdout); 3632 do { 3633 c = toupper(getc(stdin)); 3634 while (c != '\n' && getc(stdin) != '\n') 3635 if (feof(stdin)) 3636 return; /* and do not flush */ 3637 } while (c != 'Y' && c != 'N'); 3638 printf("\n"); 3639 if (c == 'N') /* user said no */ 3640 return; 3641 } 3642 3643 if (setsockopt(s, IPPROTO_IP, opt, &tbl, sizeof(tbl)) < 0) { 3644 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)", 3645 opt == IP_FW_TBL_FLUSH ? "FLUSH" : "DESTROY"); 3646 } 3647 if (!do_quiet) { 3648 if (tbl.tableid >= 0) { 3649 printf("%sed table %d\n", 3650 opt == IP_FW_TBL_FLUSH ? "Flush" : "Destroy", 3651 tbl.tableid); 3652 } else { 3653 printf("Flushed all tables\n"); 3654 } 3655 } 3656 } 3657 3658 static void 3659 table_list(void) 3660 { 3661 struct ipfw_ioc_tbllist *list; 3662 int table_max, i; 3663 size_t len; 3664 socklen_t len1; 3665 3666 len = sizeof(table_max); 3667 if (sysctlbyname("net.inet.ip.fw.table_max", &table_max, &len, 3668 NULL, 0) < 0) 3669 err(EX_UNAVAILABLE, "sysctl net.inet.ip.fw.table_max failed"); 3670 3671 len1 = __offsetof(struct ipfw_ioc_tbllist, tables[table_max]); 3672 list = malloc(len1); 3673 list->tableid = -1; 3674 3675 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, list, &len1) < 0) 3676 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)"); 3677 3678 for (i = 0; i < list->tablecnt; ++i) 3679 printf("%u\n", list->tables[i]); 3680 } 3681 3682 /* XXX copied from route(8) */ 3683 static void 3684 inet_makenetandmask(in_addr_t net, struct sockaddr_in *in, 3685 struct sockaddr_in *in_mask, int bits) 3686 { 3687 in_addr_t addr, mask = 0; 3688 char *cp; 3689 3690 /* 3691 * XXX: This approach unable to handle 0.0.0.1/32 correctly 3692 * as inet_network() converts 0.0.0.1 and 1 equally. 3693 */ 3694 if (net <= 0xff) 3695 addr = net << IN_CLASSA_NSHIFT; 3696 else if (net <= 0xffff) 3697 addr = net << IN_CLASSB_NSHIFT; 3698 else if (net <= 0xffffff) 3699 addr = net << IN_CLASSC_NSHIFT; 3700 else 3701 addr = net; 3702 3703 if (bits != 0) 3704 mask = 0xffffffff << (32 - bits); 3705 else if (net == 0) 3706 mask = 0; 3707 else if (IN_CLASSA(addr)) 3708 mask = IN_CLASSA_NET; 3709 else if (IN_CLASSB(addr)) 3710 mask = IN_CLASSB_NET; 3711 else if (IN_CLASSC(addr)) 3712 mask = IN_CLASSC_NET; 3713 else if (IN_MULTICAST(addr)) 3714 mask = IN_CLASSD_NET; 3715 else 3716 mask = 0xffffffff; 3717 3718 in->sin_family = AF_INET; 3719 in->sin_len = sizeof(struct sockaddr_in); 3720 in->sin_addr.s_addr = htonl(addr); 3721 3722 if (mask != 0xffffffff) { 3723 in_mask->sin_addr.s_addr = htonl(mask); 3724 cp = (char *)(&in_mask->sin_addr + 1); 3725 while (*--cp == 0 && cp > (char *)in_mask) 3726 ; 3727 in_mask->sin_len = 1 + cp - (char *)in_mask; 3728 } else { 3729 in_mask->sin_len = 0; /* mask as 'host mask' */ 3730 } 3731 } 3732 3733 static void 3734 table_alt(int ac, char **av, int opt) 3735 { 3736 struct ipfw_ioc_tblcont ent; 3737 struct ipfw_ioc_tblent *te; 3738 char *eptr; 3739 3740 --ac; 3741 ++av; 3742 if (ac == 0) 3743 errx(EX_DATAERR, "missing table id"); 3744 3745 memset(&ent, 0, sizeof(ent)); 3746 ent.tableid = strtoul(*av, &eptr, 0); 3747 ent.entcnt = 1; 3748 te = &ent.ent[0]; 3749 if (*eptr != '\0') 3750 errx(EX_DATAERR, "invalid table id %s", *av); 3751 3752 --ac; 3753 ++av; 3754 if (ac == 0) 3755 errx(EX_DATAERR, "missing addresses"); 3756 3757 while (ac > 0) { 3758 char *q; 3759 3760 q = strchr(*av, '/'); 3761 if (q != NULL) { 3762 in_addr_t val; 3763 int bits; 3764 3765 *q = '\0'; 3766 val = inet_network(*av); 3767 *q = '/'; 3768 if (val == INADDR_NONE) { 3769 fflush(stdout); 3770 errx(EX_DATAERR, "invalid address %s", *av); 3771 } 3772 3773 bits = strtoul(q + 1, &eptr, 0); 3774 if (*eptr != '\0') { 3775 fflush(stdout); 3776 errx(EX_DATAERR, "invalid address %s", *av); 3777 } 3778 inet_makenetandmask(val, &te->key, &te->netmask, bits); 3779 } else { 3780 int n; 3781 3782 n = inet_pton(AF_INET, *av, &te->key.sin_addr); 3783 if (n == 0) { 3784 fflush(stdout); 3785 errx(EX_DATAERR, "invalid address %s", *av); 3786 } else if (n < 0) { 3787 fflush(stdout); 3788 err(EX_UNAVAILABLE, "inet_pton failed"); 3789 } 3790 te->key.sin_family = AF_INET; 3791 te->key.sin_len = sizeof(struct sockaddr_in); 3792 te->netmask.sin_len = 0; /* mark as 'host mask' */ 3793 } 3794 3795 if (setsockopt(s, IPPROTO_IP, opt, &ent, sizeof(ent)) < 0) { 3796 if (opt == IP_FW_TBL_ADD && errno == EEXIST) { 3797 printf("Failed to add %s to table %d\n", 3798 *av, ent.tableid); 3799 } else if (opt == IP_FW_TBL_DEL && errno == ESRCH) { 3800 printf("Failed to delete %s from table %d\n", 3801 *av, ent.tableid); 3802 } else { 3803 fflush(stdout); 3804 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)", 3805 opt == IP_FW_TBL_ADD ? "ADD" : "DEL"); 3806 } 3807 } else if (!do_quiet) { 3808 printf("%sed %s %s table %d\n", 3809 opt == IP_FW_TBL_ADD ? "Add" : "Delet", *av, 3810 opt == IP_FW_TBL_ADD ? "to" : "from", ent.tableid); 3811 } 3812 3813 --ac; 3814 ++av; 3815 } 3816 } 3817 3818 static void 3819 table_show(int ac, char **av) 3820 { 3821 struct ipfw_ioc_tblcont *cont = NULL; 3822 int tableid, count = 128, i, uwidth = 0, lwidth = 0; 3823 char *eptr; 3824 3825 --ac; 3826 ++av; 3827 if (ac == 0) 3828 errx(EX_DATAERR, "missing table id"); 3829 3830 tableid = strtoul(*av, &eptr, 0); 3831 if (*eptr != '\0') 3832 errx(EX_DATAERR, "invalid table id %s", *av); 3833 3834 for (;;) { 3835 socklen_t len; 3836 3837 len = __offsetof(struct ipfw_ioc_tblcont, ent[count]); 3838 cont = reallocf(cont, len); 3839 cont->tableid = tableid; 3840 3841 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, cont, &len) < 0) { 3842 if (errno == E2BIG) { 3843 count *= 2; 3844 continue; 3845 } 3846 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)"); 3847 } 3848 break; 3849 } 3850 if (cont->entcnt == 0) 3851 return; 3852 3853 if (do_acct) { 3854 for (i = 0; i < cont->entcnt; ++i) { 3855 int width; 3856 3857 width = snprintf(NULL, 0, "%ju", 3858 (uintmax_t)cont->ent[i].use); 3859 if (width > uwidth) 3860 uwidth = width; 3861 } 3862 } 3863 3864 for (i = 0; i < cont->entcnt; ++i) { 3865 const struct ipfw_ioc_tblent *te = &cont->ent[i]; 3866 char addr[INET_ADDRSTRLEN]; 3867 3868 if (do_acct) 3869 printf("%*ju ", uwidth, (uintmax_t)te->use); 3870 if (do_time) { 3871 char timestr[30]; 3872 3873 if (lwidth == 0) { 3874 time_t t0 = 0; 3875 3876 strcpy(timestr, ctime(&t0)); 3877 *strchr(timestr, '\n') = '\0'; 3878 lwidth = strlen(timestr); 3879 } 3880 if (te->last_used) { 3881 time_t t = _long_to_time(te->last_used); 3882 3883 strcpy(timestr, ctime(&t)); 3884 *strchr(timestr, '\n') = '\0'; 3885 printf("%s ", timestr); 3886 } else { 3887 printf("%*s ", lwidth, " "); 3888 } 3889 } 3890 3891 if (te->netmask.sin_len == 0) { 3892 printf("%s\n", inet_ntop(AF_INET, 3893 &te->key.sin_addr, addr, sizeof(addr))); 3894 } else { 3895 struct sockaddr_in mask; 3896 int b; 3897 3898 memset(&mask, 0, sizeof(mask)); 3899 memcpy(&mask, &te->netmask, 3900 te->netmask.sin_len); 3901 b = ffs(ntohl(te->netmask.sin_addr.s_addr)); 3902 b = 32 - (b - 1); 3903 3904 printf("%s/%d\n", inet_ntop(AF_INET, 3905 &te->key.sin_addr, addr, sizeof(addr)), b); 3906 } 3907 } 3908 } 3909 3910 static void 3911 table_zero(int ac, char **av) 3912 { 3913 struct ipfw_ioc_table tbl; 3914 3915 --ac; 3916 ++av; 3917 3918 memset(&tbl, 0, sizeof(tbl)); 3919 if (ac == 0) { 3920 tbl.tableid = -1; 3921 } else { 3922 char *eptr; 3923 3924 tbl.tableid = strtoul(*av, &eptr, 0); 3925 if (*eptr != '\0') 3926 errx(EX_DATAERR, "invalid table id %s", *av); 3927 } 3928 3929 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_ZERO, &tbl, sizeof(tbl)) < 0) 3930 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_ZERO)"); 3931 if (!do_quiet) 3932 printf("Accounting cleared\n"); 3933 } 3934 3935 static void 3936 table_expire(int ac, char **av) 3937 { 3938 struct ipfw_ioc_tblexp tbl; 3939 char *eptr; 3940 socklen_t len; 3941 3942 --ac; 3943 ++av; 3944 3945 memset(&tbl, 0, sizeof(tbl)); 3946 if (ac == 0) { 3947 errx(EX_DATAERR, "missing expire time"); 3948 } else if (ac == 1) { 3949 tbl.tableid = -1; 3950 } else { 3951 tbl.tableid = strtoul(*av, &eptr, 0); 3952 if (*eptr != '\0') 3953 errx(EX_DATAERR, "invalid table id %s", *av); 3954 --ac; 3955 ++av; 3956 } 3957 3958 tbl.expire = strtoul(*av, &eptr, 0); 3959 if (*eptr != '\0') 3960 errx(EX_DATAERR, "invalid expire timeout %s", *av); 3961 3962 if (!do_force && !do_quiet) { /* need to ask user */ 3963 int c; 3964 3965 printf("Are you sure? [yn] "); 3966 fflush(stdout); 3967 do { 3968 c = toupper(getc(stdin)); 3969 while (c != '\n' && getc(stdin) != '\n') 3970 if (feof(stdin)) 3971 return; /* and do not flush */ 3972 } while (c != 'Y' && c != 'N'); 3973 printf("\n"); 3974 if (c == 'N') /* user said no */ 3975 return; 3976 } 3977 3978 len = sizeof(tbl); 3979 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_EXPIRE, &tbl, &len) < 0) 3980 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_EXPIRE)"); 3981 if (!do_quiet) { 3982 printf("Expired %d address%s\n", tbl.expcnt, 3983 (tbl.expcnt == 0 || tbl.expcnt > 1) ? "es" : ""); 3984 } 3985 } 3986 3987 static int 3988 ipfw_main(int ac, char **av) 3989 { 3990 int ch; 3991 3992 if (ac == 1) 3993 show_usage(); 3994 3995 /* Set the force flag for non-interactive processes */ 3996 do_force = !isatty(STDIN_FILENO); 3997 3998 optind = optreset = 1; 3999 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 4000 switch (ch) { 4001 case 'h': /* help */ 4002 help(); 4003 break; /* NOTREACHED */ 4004 4005 case 's': /* sort */ 4006 do_sort = atoi(optarg); 4007 break; 4008 case 'a': 4009 do_acct = 1; 4010 break; 4011 case 'c': 4012 do_compact = 1; 4013 break; 4014 case 'd': 4015 do_dynamic = 1; 4016 break; 4017 case 'e': 4018 do_expired = 1; 4019 break; 4020 case 'f': 4021 do_force = 1; 4022 break; 4023 case 'N': 4024 do_resolv = 1; 4025 break; 4026 case 'q': 4027 do_quiet = 1; 4028 break; 4029 case 'S': 4030 show_sets = 1; 4031 break; 4032 case 't': 4033 do_time = 1; 4034 break; 4035 case 'v': /* verbose */ 4036 verbose++; 4037 break; 4038 default: 4039 show_usage(); 4040 } 4041 4042 ac -= optind; 4043 av += optind; 4044 NEED1("bad arguments, for usage summary ``ipfw''"); 4045 4046 /* 4047 * Reset do_pipe and do_table. 4048 */ 4049 do_pipe = 0; 4050 do_table = 0; 4051 4052 /* 4053 * optional: pipe, queue or table 4054 */ 4055 if (!strncmp(*av, "pipe", strlen(*av))) { 4056 do_pipe = 1; 4057 ac--; 4058 av++; 4059 } else if (!strncmp(*av, "queue", strlen(*av))) { 4060 do_pipe = 2; 4061 ac--; 4062 av++; 4063 } else if (!strncmp(*av, "table", strlen(*av))) { 4064 do_table = 1; 4065 ac--; 4066 av++; 4067 } 4068 NEED1("missing command"); 4069 4070 /* 4071 * for pipes, queues and table we normally say 'pipe NN config' 4072 * but the code is easier to parse as 'pipe config NN' so we 4073 * swap the two arguments. 4074 */ 4075 if ((do_pipe > 0 || do_table > 0) && ac > 1 && 4076 *av[0] >= '0' && *av[0] <= '9') { 4077 char *p = av[0]; 4078 av[0] = av[1]; 4079 av[1] = p; 4080 } 4081 if (do_table) { 4082 if (!strncmp(*av, "create", strlen(*av))) 4083 table_create(ac, av); 4084 else if (!strncmp(*av, "destroy", strlen(*av))) 4085 table_flush(ac, av, IP_FW_TBL_DESTROY); 4086 else if (!strncmp(*av, "list", strlen(*av))) 4087 table_list(); 4088 else if (!strncmp(*av, "add", strlen(*av))) 4089 table_alt(ac, av, IP_FW_TBL_ADD); 4090 else if (!strncmp(*av, "delete", strlen(*av))) 4091 table_alt(ac, av, IP_FW_TBL_DEL); 4092 else if (!strncmp(*av, "flush", strlen(*av))) 4093 table_flush(ac, av, IP_FW_TBL_FLUSH); 4094 else if (!strncmp(*av, "print", strlen(*av))) 4095 table_show(ac, av); 4096 else if (!strncmp(*av, "show", strlen(*av))) { 4097 do_acct++; 4098 table_show(ac, av); 4099 } else if (!strncmp(*av, "zero", strlen(*av))) 4100 table_zero(ac, av); 4101 else if (!strncmp(*av, "expire", strlen(*av))) 4102 table_expire(ac, av); 4103 else 4104 errx(EX_USAGE, "bad command `%s'", *av); 4105 return 0; 4106 } 4107 if (!strncmp(*av, "add", strlen(*av))) 4108 add(ac, av); 4109 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 4110 config_pipe(ac, av); 4111 else if (!strncmp(*av, "delete", strlen(*av))) 4112 delete(ac, av); 4113 else if (!strncmp(*av, "flush", strlen(*av))) 4114 flush(); 4115 else if (!strncmp(*av, "zero", strlen(*av))) 4116 zero(ac, av); 4117 else if (!strncmp(*av, "resetlog", strlen(*av))) 4118 resetlog(ac, av); 4119 else if (!strncmp(*av, "print", strlen(*av)) || 4120 !strncmp(*av, "list", strlen(*av))) 4121 list(ac, av); 4122 else if (!strncmp(*av, "enable", strlen(*av))) 4123 sysctl_handler(ac, av, 1); 4124 else if (!strncmp(*av, "disable", strlen(*av))) 4125 sysctl_handler(ac, av, 0); 4126 else if (!strncmp(*av, "set", strlen(*av))) 4127 sets_handler(ac, av); 4128 else if (!strncmp(*av, "show", strlen(*av))) { 4129 do_acct++; 4130 list(ac, av); 4131 } else 4132 errx(EX_USAGE, "bad command `%s'", *av); 4133 return 0; 4134 } 4135 4136 4137 static void 4138 ipfw_readfile(int ac, char *av[]) 4139 { 4140 #define MAX_ARGS 32 4141 #define WHITESP " \t\f\v\n\r" 4142 char buf[BUFSIZ]; 4143 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 4144 char linename[20]; 4145 int i=0, lineno=0, qflag=0, pflag=0, status; 4146 FILE *f = NULL; 4147 pid_t preproc = 0; 4148 int c; 4149 4150 while ((c = getopt(ac, av, "D:U:p:q")) != -1) 4151 switch(c) { 4152 case 'D': 4153 if (!pflag) 4154 errx(EX_USAGE, "-D requires -p"); 4155 if (i > MAX_ARGS - 2) 4156 errx(EX_USAGE, 4157 "too many -D or -U options"); 4158 args[i++] = __DECONST(char *, "-D"); 4159 args[i++] = optarg; 4160 break; 4161 4162 case 'U': 4163 if (!pflag) 4164 errx(EX_USAGE, "-U requires -p"); 4165 if (i > MAX_ARGS - 2) 4166 errx(EX_USAGE, 4167 "too many -D or -U options"); 4168 args[i++] = __DECONST(char *, "-U"); 4169 args[i++] = optarg; 4170 break; 4171 4172 case 'p': 4173 pflag = 1; 4174 cmd = optarg; 4175 args[0] = cmd; 4176 i = 1; 4177 break; 4178 4179 case 'q': 4180 qflag = 1; 4181 break; 4182 4183 default: 4184 errx(EX_USAGE, "bad arguments, for usage" 4185 " summary ``ipfw''"); 4186 } 4187 4188 av += optind; 4189 ac -= optind; 4190 if (ac != 1) 4191 errx(EX_USAGE, "extraneous filename arguments"); 4192 4193 if ((f = fopen(av[0], "r")) == NULL) 4194 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 4195 4196 if (pflag) { 4197 /* pipe through preprocessor (cpp or m4) */ 4198 int pipedes[2]; 4199 4200 args[i] = NULL; 4201 4202 if (pipe(pipedes) == -1) 4203 err(EX_OSERR, "cannot create pipe"); 4204 4205 switch((preproc = fork())) { 4206 case -1: 4207 err(EX_OSERR, "cannot fork"); 4208 4209 case 0: 4210 /* child */ 4211 if (dup2(fileno(f), 0) == -1 4212 || dup2(pipedes[1], 1) == -1) 4213 err(EX_OSERR, "dup2()"); 4214 fclose(f); 4215 close(pipedes[1]); 4216 close(pipedes[0]); 4217 execvp(cmd, args); 4218 err(EX_OSERR, "execvp(%s) failed", cmd); 4219 4220 default: 4221 /* parent */ 4222 fclose(f); 4223 close(pipedes[1]); 4224 if ((f = fdopen(pipedes[0], "r")) == NULL) { 4225 int savederrno = errno; 4226 4227 kill(preproc, SIGTERM); 4228 errno = savederrno; 4229 err(EX_OSERR, "fdopen()"); 4230 } 4231 } 4232 } 4233 4234 while (fgets(buf, BUFSIZ, f)) { 4235 lineno++; 4236 snprintf(linename, sizeof(linename), "Line %d", lineno); 4237 args[0] = linename; 4238 4239 if (*buf == '#') 4240 continue; 4241 if ((p = strchr(buf, '#')) != NULL) 4242 *p = '\0'; 4243 i = 1; 4244 if (qflag) 4245 args[i++] = __DECONST(char *, "-q"); 4246 for (a = strtok(buf, WHITESP); 4247 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 4248 args[i] = a; 4249 if (i == (qflag? 2: 1)) 4250 continue; 4251 if (i == MAX_ARGS) 4252 errx(EX_USAGE, "%s: too many arguments", 4253 linename); 4254 args[i] = NULL; 4255 4256 ipfw_main(i, args); 4257 } 4258 fclose(f); 4259 if (pflag) { 4260 if (waitpid(preproc, &status, 0) == -1) 4261 errx(EX_OSERR, "waitpid()"); 4262 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 4263 errx(EX_UNAVAILABLE, 4264 "preprocessor exited with status %d", 4265 WEXITSTATUS(status)); 4266 else if (WIFSIGNALED(status)) 4267 errx(EX_UNAVAILABLE, 4268 "preprocessor exited with signal %d", 4269 WTERMSIG(status)); 4270 } 4271 } 4272 4273 int 4274 main(int ac, char *av[]) 4275 { 4276 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 4277 if (s < 0) 4278 err(EX_UNAVAILABLE, "socket"); 4279 4280 /* 4281 * If the last argument is an absolute pathname, interpret it 4282 * as a file to be preprocessed. 4283 */ 4284 4285 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 4286 ipfw_readfile(ac, av); 4287 else 4288 ipfw_main(ac, av); 4289 return EX_OK; 4290 } 4291