ipfw2.c revision 116919
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: head/sbin/ipfw/ipfw2.c 116919 2003-06-27 17:18:14Z luigi $ 21 */ 22 23#include <sys/param.h> 24#include <sys/mbuf.h> 25#include <sys/socket.h> 26#include <sys/sockio.h> 27#include <sys/sysctl.h> 28#include <sys/time.h> 29#include <sys/wait.h> 30 31#include <ctype.h> 32#include <err.h> 33#include <errno.h> 34#include <grp.h> 35#include <limits.h> 36#include <netdb.h> 37#include <pwd.h> 38#include <signal.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <stdarg.h> 42#include <string.h> 43#include <timeconv.h> 44#include <unistd.h> 45#include <sysexits.h> 46 47#include <net/if.h> 48#include <netinet/in.h> 49#include <netinet/in_systm.h> 50#include <netinet/ip.h> 51#include <netinet/ip_icmp.h> 52#include <netinet/ip_fw.h> 53#include <net/route.h> /* def. of struct route */ 54#include <netinet/ip_dummynet.h> 55#include <netinet/tcp.h> 56#include <arpa/inet.h> 57 58int s, /* main RAW socket */ 59 do_resolv, /* Would try to resolve all */ 60 do_acct, /* Show packet/byte count */ 61 do_time, /* Show time stamps */ 62 do_quiet, /* Be quiet in add and flush */ 63 do_force, /* Don't ask for confirmation */ 64 do_pipe, /* this cmd refers to a pipe */ 65 do_sort, /* field to sort results (0 = no) */ 66 do_dynamic, /* display dynamic rules */ 67 do_expired, /* display expired dynamic rules */ 68 do_compact, /* show rules in compact mode */ 69 show_sets, /* display rule sets */ 70 verbose; 71 72#define IP_MASK_ALL 0xffffffff 73 74/* 75 * structure to hold flag names and associated values to be 76 * set in the appropriate masks. 77 * A NULL string terminates the array. 78 * Often, an element with 0 value contains an error string. 79 * 80 */ 81struct _s_x { 82 char *s; 83 int x; 84}; 85 86static struct _s_x f_tcpflags[] = { 87 { "syn", TH_SYN }, 88 { "fin", TH_FIN }, 89 { "ack", TH_ACK }, 90 { "psh", TH_PUSH }, 91 { "rst", TH_RST }, 92 { "urg", TH_URG }, 93 { "tcp flag", 0 }, 94 { NULL, 0 } 95}; 96 97static struct _s_x f_tcpopts[] = { 98 { "mss", IP_FW_TCPOPT_MSS }, 99 { "maxseg", IP_FW_TCPOPT_MSS }, 100 { "window", IP_FW_TCPOPT_WINDOW }, 101 { "sack", IP_FW_TCPOPT_SACK }, 102 { "ts", IP_FW_TCPOPT_TS }, 103 { "timestamp", IP_FW_TCPOPT_TS }, 104 { "cc", IP_FW_TCPOPT_CC }, 105 { "tcp option", 0 }, 106 { NULL, 0 } 107}; 108 109/* 110 * IP options span the range 0 to 255 so we need to remap them 111 * (though in fact only the low 5 bits are significant). 112 */ 113static struct _s_x f_ipopts[] = { 114 { "ssrr", IP_FW_IPOPT_SSRR}, 115 { "lsrr", IP_FW_IPOPT_LSRR}, 116 { "rr", IP_FW_IPOPT_RR}, 117 { "ts", IP_FW_IPOPT_TS}, 118 { "ip option", 0 }, 119 { NULL, 0 } 120}; 121 122static struct _s_x f_iptos[] = { 123 { "lowdelay", IPTOS_LOWDELAY}, 124 { "throughput", IPTOS_THROUGHPUT}, 125 { "reliability", IPTOS_RELIABILITY}, 126 { "mincost", IPTOS_MINCOST}, 127 { "congestion", IPTOS_CE}, 128 { "ecntransport", IPTOS_ECT}, 129 { "ip tos option", 0}, 130 { NULL, 0 } 131}; 132 133static struct _s_x limit_masks[] = { 134 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 135 {"src-addr", DYN_SRC_ADDR}, 136 {"src-port", DYN_SRC_PORT}, 137 {"dst-addr", DYN_DST_ADDR}, 138 {"dst-port", DYN_DST_PORT}, 139 {NULL, 0} 140}; 141 142/* 143 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 144 * This is only used in this code. 145 */ 146#define IPPROTO_ETHERTYPE 0x1000 147static struct _s_x ether_types[] = { 148 /* 149 * Note, we cannot use "-:&/" in the names because they are field 150 * separators in the type specifications. Also, we use s = NULL as 151 * end-delimiter, because a type of 0 can be legal. 152 */ 153 { "ip", 0x0800 }, 154 { "ipv4", 0x0800 }, 155 { "ipv6", 0x86dd }, 156 { "arp", 0x0806 }, 157 { "rarp", 0x8035 }, 158 { "vlan", 0x8100 }, 159 { "loop", 0x9000 }, 160 { "trail", 0x1000 }, 161 { "at", 0x809b }, 162 { "atalk", 0x809b }, 163 { "aarp", 0x80f3 }, 164 { "pppoe_disc", 0x8863 }, 165 { "pppoe_sess", 0x8864 }, 166 { "ipx_8022", 0x00E0 }, 167 { "ipx_8023", 0x0000 }, 168 { "ipx_ii", 0x8137 }, 169 { "ipx_snap", 0x8137 }, 170 { "ipx", 0x8137 }, 171 { "ns", 0x0600 }, 172 { NULL, 0 } 173}; 174 175static void show_usage(void); 176 177enum tokens { 178 TOK_NULL=0, 179 180 TOK_OR, 181 TOK_NOT, 182 TOK_STARTBRACE, 183 TOK_ENDBRACE, 184 185 TOK_ACCEPT, 186 TOK_COUNT, 187 TOK_PIPE, 188 TOK_QUEUE, 189 TOK_DIVERT, 190 TOK_TEE, 191 TOK_FORWARD, 192 TOK_SKIPTO, 193 TOK_DENY, 194 TOK_REJECT, 195 TOK_RESET, 196 TOK_UNREACH, 197 TOK_CHECKSTATE, 198 199 TOK_UID, 200 TOK_GID, 201 TOK_IN, 202 TOK_LIMIT, 203 TOK_KEEPSTATE, 204 TOK_LAYER2, 205 TOK_OUT, 206 TOK_XMIT, 207 TOK_RECV, 208 TOK_VIA, 209 TOK_FRAG, 210 TOK_IPOPTS, 211 TOK_IPLEN, 212 TOK_IPID, 213 TOK_IPPRECEDENCE, 214 TOK_IPTOS, 215 TOK_IPTTL, 216 TOK_IPVER, 217 TOK_ESTAB, 218 TOK_SETUP, 219 TOK_TCPFLAGS, 220 TOK_TCPOPTS, 221 TOK_TCPSEQ, 222 TOK_TCPACK, 223 TOK_TCPWIN, 224 TOK_ICMPTYPES, 225 TOK_MAC, 226 TOK_MACTYPE, 227 TOK_VERREVPATH, 228 229 TOK_PLR, 230 TOK_NOERROR, 231 TOK_BUCKETS, 232 TOK_DSTIP, 233 TOK_SRCIP, 234 TOK_DSTPORT, 235 TOK_SRCPORT, 236 TOK_ALL, 237 TOK_MASK, 238 TOK_BW, 239 TOK_DELAY, 240 TOK_RED, 241 TOK_GRED, 242 TOK_DROPTAIL, 243 TOK_PROTO, 244 TOK_WEIGHT, 245}; 246 247struct _s_x dummynet_params[] = { 248 { "plr", TOK_PLR }, 249 { "noerror", TOK_NOERROR }, 250 { "buckets", TOK_BUCKETS }, 251 { "dst-ip", TOK_DSTIP }, 252 { "src-ip", TOK_SRCIP }, 253 { "dst-port", TOK_DSTPORT }, 254 { "src-port", TOK_SRCPORT }, 255 { "proto", TOK_PROTO }, 256 { "weight", TOK_WEIGHT }, 257 { "all", TOK_ALL }, 258 { "mask", TOK_MASK }, 259 { "droptail", TOK_DROPTAIL }, 260 { "red", TOK_RED }, 261 { "gred", TOK_GRED }, 262 { "bw", TOK_BW }, 263 { "bandwidth", TOK_BW }, 264 { "delay", TOK_DELAY }, 265 { "pipe", TOK_PIPE }, 266 { "queue", TOK_QUEUE }, 267 { "dummynet-params", TOK_NULL }, 268 { NULL, 0 } 269}; 270 271struct _s_x rule_actions[] = { 272 { "accept", TOK_ACCEPT }, 273 { "pass", TOK_ACCEPT }, 274 { "allow", TOK_ACCEPT }, 275 { "permit", TOK_ACCEPT }, 276 { "count", TOK_COUNT }, 277 { "pipe", TOK_PIPE }, 278 { "queue", TOK_QUEUE }, 279 { "divert", TOK_DIVERT }, 280 { "tee", TOK_TEE }, 281 { "fwd", TOK_FORWARD }, 282 { "forward", TOK_FORWARD }, 283 { "skipto", TOK_SKIPTO }, 284 { "deny", TOK_DENY }, 285 { "drop", TOK_DENY }, 286 { "reject", TOK_REJECT }, 287 { "reset", TOK_RESET }, 288 { "unreach", TOK_UNREACH }, 289 { "check-state", TOK_CHECKSTATE }, 290 { NULL, TOK_NULL }, 291 { NULL, 0 } 292}; 293 294struct _s_x rule_options[] = { 295 { "uid", TOK_UID }, 296 { "gid", TOK_GID }, 297 { "in", TOK_IN }, 298 { "limit", TOK_LIMIT }, 299 { "keep-state", TOK_KEEPSTATE }, 300 { "bridged", TOK_LAYER2 }, 301 { "layer2", TOK_LAYER2 }, 302 { "out", TOK_OUT }, 303 { "xmit", TOK_XMIT }, 304 { "recv", TOK_RECV }, 305 { "via", TOK_VIA }, 306 { "fragment", TOK_FRAG }, 307 { "frag", TOK_FRAG }, 308 { "ipoptions", TOK_IPOPTS }, 309 { "ipopts", TOK_IPOPTS }, 310 { "iplen", TOK_IPLEN }, 311 { "ipid", TOK_IPID }, 312 { "ipprecedence", TOK_IPPRECEDENCE }, 313 { "iptos", TOK_IPTOS }, 314 { "ipttl", TOK_IPTTL }, 315 { "ipversion", TOK_IPVER }, 316 { "ipver", TOK_IPVER }, 317 { "estab", TOK_ESTAB }, 318 { "established", TOK_ESTAB }, 319 { "setup", TOK_SETUP }, 320 { "tcpflags", TOK_TCPFLAGS }, 321 { "tcpflgs", TOK_TCPFLAGS }, 322 { "tcpoptions", TOK_TCPOPTS }, 323 { "tcpopts", TOK_TCPOPTS }, 324 { "tcpseq", TOK_TCPSEQ }, 325 { "tcpack", TOK_TCPACK }, 326 { "tcpwin", TOK_TCPWIN }, 327 { "icmptype", TOK_ICMPTYPES }, 328 { "icmptypes", TOK_ICMPTYPES }, 329 { "dst-ip", TOK_DSTIP }, 330 { "src-ip", TOK_SRCIP }, 331 { "dst-port", TOK_DSTPORT }, 332 { "src-port", TOK_SRCPORT }, 333 { "proto", TOK_PROTO }, 334 { "MAC", TOK_MAC }, 335 { "mac", TOK_MAC }, 336 { "mac-type", TOK_MACTYPE }, 337 { "verrevpath", TOK_VERREVPATH }, 338 339 { "not", TOK_NOT }, /* pseudo option */ 340 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 341 { "or", TOK_OR }, /* pseudo option */ 342 { "|", /* escape */ TOK_OR }, /* pseudo option */ 343 { "{", TOK_STARTBRACE }, /* pseudo option */ 344 { "(", TOK_STARTBRACE }, /* pseudo option */ 345 { "}", TOK_ENDBRACE }, /* pseudo option */ 346 { ")", TOK_ENDBRACE }, /* pseudo option */ 347 { NULL, TOK_NULL }, 348 { NULL, 0 } 349}; 350 351static __inline u_int64_t 352align_uint64(u_int64_t *pll) { 353 u_int64_t ret; 354 355 bcopy (pll, &ret, sizeof(ret)); 356 return ret; 357}; 358 359/** 360 * match_token takes a table and a string, returns the value associated 361 * with the string (0 meaning an error in most cases) 362 */ 363static int 364match_token(struct _s_x *table, char *string) 365{ 366 struct _s_x *pt; 367 int i = strlen(string); 368 369 for (pt = table ; i && pt->s != NULL ; pt++) 370 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 371 return pt->x; 372 return -1; 373}; 374 375static char * 376match_value(struct _s_x *p, u_int32_t value) 377{ 378 for (; p->s != NULL; p++) 379 if (p->x == value) 380 return p->s; 381 return NULL; 382} 383 384/* 385 * prints one port, symbolic or numeric 386 */ 387static void 388print_port(int proto, u_int16_t port) 389{ 390 391 if (proto == IPPROTO_ETHERTYPE) { 392 char *s; 393 394 if (do_resolv && (s = match_value(ether_types, port)) ) 395 printf("%s", s); 396 else 397 printf("0x%04x", port); 398 } else { 399 struct servent *se = NULL; 400 if (do_resolv) { 401 struct protoent *pe = getprotobynumber(proto); 402 403 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 404 } 405 if (se) 406 printf("%s", se->s_name); 407 else 408 printf("%d", port); 409 } 410} 411 412/* 413 * print the values in a list of ports 414 * XXX todo: add support for mask. 415 */ 416static void 417print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 418{ 419 u_int16_t *p = cmd->ports; 420 int i; 421 char *sep; 422 423 if (cmd->o.len & F_NOT) 424 printf(" not"); 425 if (opcode != 0) { 426 switch (opcode) { 427 case O_IP_DSTPORT: 428 sep = "dst-port"; 429 break; 430 case O_IP_SRCPORT: 431 sep = "src-port"; 432 break; 433 case O_IPID: 434 sep = "ipid"; 435 break; 436 case O_IPLEN: 437 sep = "iplen"; 438 break; 439 case O_IPTTL: 440 sep = "ipttl"; 441 break; 442 case O_MAC_TYPE: 443 sep = "mac-type"; 444 break; 445 default: 446 sep = "???"; 447 break; 448 } 449 printf (" %s", sep); 450 } 451 sep = " "; 452 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 453 printf(sep); 454 print_port(proto, p[0]); 455 if (p[0] != p[1]) { 456 printf("-"); 457 print_port(proto, p[1]); 458 } 459 sep = ","; 460 } 461} 462 463/* 464 * Like strtol, but also translates service names into port numbers 465 * for some protocols. 466 * In particular: 467 * proto == -1 disables the protocol check; 468 * proto == IPPROTO_ETHERTYPE looks up an internal table 469 * proto == <some value in /etc/protocols> matches the values there. 470 * Returns *end == s in case the parameter is not found. 471 */ 472static int 473strtoport(char *s, char **end, int base, int proto) 474{ 475 char *p, *buf; 476 char *s1; 477 int i; 478 479 *end = s; /* default - not found */ 480 if ( *s == '\0') 481 return 0; /* not found */ 482 483 if (isdigit(*s)) 484 return strtol(s, end, base); 485 486 /* 487 * find separator. '\\' escapes the next char. 488 */ 489 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 490 if (*s1 == '\\' && s1[1] != '\0') 491 s1++; 492 493 buf = malloc(s1 - s + 1); 494 if (buf == NULL) 495 return 0; 496 497 /* 498 * copy into a buffer skipping backslashes 499 */ 500 for (p = s, i = 0; p != s1 ; p++) 501 if ( *p != '\\') 502 buf[i++] = *p; 503 buf[i++] = '\0'; 504 505 if (proto == IPPROTO_ETHERTYPE) { 506 i = match_token(ether_types, buf); 507 free(buf); 508 if (i != -1) { /* found */ 509 *end = s1; 510 return i; 511 } 512 } else { 513 struct protoent *pe = NULL; 514 struct servent *se; 515 516 if (proto != 0) 517 pe = getprotobynumber(proto); 518 setservent(1); 519 se = getservbyname(buf, pe ? pe->p_name : NULL); 520 free(buf); 521 if (se != NULL) { 522 *end = s1; 523 return ntohs(se->s_port); 524 } 525 } 526 return 0; /* not found */ 527} 528 529/* 530 * fill the body of the command with the list of port ranges. 531 * At the moment it only understands numeric ranges. 532 */ 533static int 534fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 535{ 536 u_int16_t *p = cmd->ports; 537 int i = 0; 538 char *s = av; 539 540 while (*s) { 541 u_int16_t a, b; 542 543 a = strtoport(av, &s, 0, proto); 544 if (s == av) /* no parameter */ 545 break; 546 if (*s == '-') { /* a range */ 547 av = s+1; 548 b = strtoport(av, &s, 0, proto); 549 if (s == av) /* no parameter */ 550 break; 551 p[0] = a; 552 p[1] = b; 553 } else if (*s == ',' || *s == '\0' ) { 554 p[0] = p[1] = a; 555 } else { /* invalid separator */ 556 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", 557 *s, av); 558 } 559 i++; 560 p += 2; 561 av = s+1; 562 } 563 if (i > 0) { 564 if (i+1 > F_LEN_MASK) 565 errx(EX_DATAERR, "too many ports/ranges\n"); 566 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ 567 } 568 return i; 569} 570 571static struct _s_x icmpcodes[] = { 572 { "net", ICMP_UNREACH_NET }, 573 { "host", ICMP_UNREACH_HOST }, 574 { "protocol", ICMP_UNREACH_PROTOCOL }, 575 { "port", ICMP_UNREACH_PORT }, 576 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 577 { "srcfail", ICMP_UNREACH_SRCFAIL }, 578 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 579 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 580 { "isolated", ICMP_UNREACH_ISOLATED }, 581 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 582 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 583 { "tosnet", ICMP_UNREACH_TOSNET }, 584 { "toshost", ICMP_UNREACH_TOSHOST }, 585 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 586 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 587 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 588 { NULL, 0 } 589}; 590 591static void 592fill_reject_code(u_short *codep, char *str) 593{ 594 int val; 595 char *s; 596 597 val = strtoul(str, &s, 0); 598 if (s == str || *s != '\0' || val >= 0x100) 599 val = match_token(icmpcodes, str); 600 if (val < 0) 601 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 602 *codep = val; 603 return; 604} 605 606static void 607print_reject_code(u_int16_t code) 608{ 609 char *s = match_value(icmpcodes, code); 610 611 if (s != NULL) 612 printf("unreach %s", s); 613 else 614 printf("unreach %u", code); 615} 616 617/* 618 * Returns the number of bits set (from left) in a contiguous bitmask, 619 * or -1 if the mask is not contiguous. 620 * XXX this needs a proper fix. 621 * This effectively works on masks in big-endian (network) format. 622 * when compiled on little endian architectures. 623 * 624 * First bit is bit 7 of the first byte -- note, for MAC addresses, 625 * the first bit on the wire is bit 0 of the first byte. 626 * len is the max length in bits. 627 */ 628static int 629contigmask(u_char *p, int len) 630{ 631 int i, n; 632 for (i=0; i<len ; i++) 633 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 634 break; 635 for (n=i+1; n < len; n++) 636 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 637 return -1; /* mask not contiguous */ 638 return i; 639} 640 641/* 642 * print flags set/clear in the two bitmasks passed as parameters. 643 * There is a specialized check for f_tcpflags. 644 */ 645static void 646print_flags(char *name, ipfw_insn *cmd, struct _s_x *list) 647{ 648 char *comma=""; 649 int i; 650 u_char set = cmd->arg1 & 0xff; 651 u_char clear = (cmd->arg1 >> 8) & 0xff; 652 653 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 654 printf(" setup"); 655 return; 656 } 657 658 printf(" %s ", name); 659 for (i=0; list[i].x != 0; i++) { 660 if (set & list[i].x) { 661 set &= ~list[i].x; 662 printf("%s%s", comma, list[i].s); 663 comma = ","; 664 } 665 if (clear & list[i].x) { 666 clear &= ~list[i].x; 667 printf("%s!%s", comma, list[i].s); 668 comma = ","; 669 } 670 } 671} 672 673/* 674 * Print the ip address contained in a command. 675 */ 676static void 677print_ip(ipfw_insn_ip *cmd, char *s) 678{ 679 struct hostent *he = NULL; 680 int mb; 681 682 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 683 684 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 685 printf("me"); 686 return; 687 } 688 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 689 u_int32_t x, *d; 690 int i, j; 691 char comma = '{'; 692 693 x = cmd->o.arg1 - 1; 694 x = htonl( ~x ); 695 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 696 printf("%s/%d", inet_ntoa(cmd->addr), 697 contigmask((u_char *)&x, 32)); 698 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 699 x &= 0xff; /* base */ 700 d = (u_int32_t *)&(cmd->mask); 701 /* 702 * Print bits and ranges. 703 * Locate first bit set (i), then locate first bit unset (j). 704 * If we have 3+ consecutive bits set, then print them as a 705 * range, otherwise only print the initial bit and rescan. 706 */ 707 for (i=0; i < cmd->o.arg1; i++) 708 if (d[i/32] & (1<<(i & 31))) { 709 for (j=i+1; j < cmd->o.arg1; j++) 710 if (!(d[ j/32] & (1<<(j & 31)))) 711 break; 712 printf("%c%d", comma, i+x); 713 if (j>i+2) { /* range has at least 3 elements */ 714 printf("-%d", j-1+x); 715 i = j-1; 716 } 717 comma = ','; 718 } 719 printf("}"); 720 return; 721 } 722 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) 723 mb = 32; 724 else 725 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); 726 if (mb == 32 && do_resolv) 727 he = gethostbyaddr((char *)&(cmd->addr.s_addr), 728 sizeof(u_long), AF_INET); 729 if (he != NULL) /* resolved to name */ 730 printf("%s", he->h_name); 731 else if (mb == 0) /* any */ 732 printf("any"); 733 else { /* numeric IP followed by some kind of mask */ 734 printf("%s", inet_ntoa(cmd->addr)); 735 if (mb < 0) 736 printf(":%s", inet_ntoa(cmd->mask)); 737 else if (mb < 32) 738 printf("/%d", mb); 739 } 740} 741 742/* 743 * prints a MAC address/mask pair 744 */ 745static void 746print_mac(u_char *addr, u_char *mask) 747{ 748 int l = contigmask(mask, 48); 749 750 if (l == 0) 751 printf(" any"); 752 else { 753 printf(" %02x:%02x:%02x:%02x:%02x:%02x", 754 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 755 if (l == -1) 756 printf("&%02x:%02x:%02x:%02x:%02x:%02x", 757 mask[0], mask[1], mask[2], 758 mask[3], mask[4], mask[5]); 759 else if (l < 48) 760 printf("/%d", l); 761 } 762} 763 764static void 765fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 766{ 767 u_int8_t type; 768 769 cmd->d[0] = 0; 770 while (*av) { 771 if (*av == ',') 772 av++; 773 774 type = strtoul(av, &av, 0); 775 776 if (*av != ',' && *av != '\0') 777 errx(EX_DATAERR, "invalid ICMP type"); 778 779 if (type > 31) 780 errx(EX_DATAERR, "ICMP type out of range"); 781 782 cmd->d[0] |= 1 << type; 783 } 784 cmd->o.opcode = O_ICMPTYPE; 785 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 786} 787 788static void 789print_icmptypes(ipfw_insn_u32 *cmd) 790{ 791 int i; 792 char sep= ' '; 793 794 printf(" icmptypes"); 795 for (i = 0; i < 32; i++) { 796 if ( (cmd->d[0] & (1 << (i))) == 0) 797 continue; 798 printf("%c%d", sep, i); 799 sep = ','; 800 } 801} 802 803/* 804 * show_ipfw() prints the body of an ipfw rule. 805 * Because the standard rule has at least proto src_ip dst_ip, we use 806 * a helper function to produce these entries if not provided explicitly. 807 * The first argument is the list of fields we have, the second is 808 * the list of fields we want to be printed. 809 * 810 * Special cases if we have provided a MAC header: 811 * + if the rule does not contain IP addresses/ports, do not print them; 812 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 813 * 814 * Once we have 'have_options', IP header fields are printed as options. 815 */ 816#define HAVE_PROTO 0x0001 817#define HAVE_SRCIP 0x0002 818#define HAVE_DSTIP 0x0004 819#define HAVE_MAC 0x0008 820#define HAVE_MACTYPE 0x0010 821#define HAVE_OPTIONS 0x8000 822 823#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) 824static void 825show_prerequisites(int *flags, int want, int cmd) 826{ 827 if ( (*flags & HAVE_IP) == HAVE_IP) 828 *flags |= HAVE_OPTIONS; 829 830 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && 831 cmd != O_MAC_TYPE) { 832 /* 833 * mac-type was optimized out by the compiler, 834 * restore it 835 */ 836 printf(" any"); 837 *flags |= HAVE_MACTYPE | HAVE_OPTIONS; 838 return; 839 } 840 if ( !(*flags & HAVE_OPTIONS)) { 841 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) 842 printf(" ip"); 843 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 844 printf(" from any"); 845 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 846 printf(" to any"); 847 } 848 *flags |= want; 849} 850 851static void 852show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 853{ 854 static int twidth = 0; 855 int l; 856 ipfw_insn *cmd; 857 int proto = 0; /* default */ 858 int flags = 0; /* prerequisites */ 859 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 860 int or_block = 0; /* we are in an or block */ 861 u_int32_t set_disable; 862 863 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 864 865 if (set_disable & (1 << rule->set)) { /* disabled */ 866 if (!show_sets) 867 return; 868 else 869 printf("# DISABLED "); 870 } 871 printf("%05u ", rule->rulenum); 872 873 if (do_acct) 874 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt), 875 bcwidth, align_uint64(&rule->bcnt)); 876 877 if (do_time) { 878 char timestr[30]; 879 time_t t = (time_t)0; 880 881 if (twidth == 0) { 882 strcpy(timestr, ctime(&t)); 883 *strchr(timestr, '\n') = '\0'; 884 twidth = strlen(timestr); 885 } 886 if (rule->timestamp) { 887 t = _long_to_time(rule->timestamp); 888 889 strcpy(timestr, ctime(&t)); 890 *strchr(timestr, '\n') = '\0'; 891 printf("%s ", timestr); 892 } else { 893 printf("%*s", twidth, " "); 894 } 895 } 896 897 if (show_sets) 898 printf("set %d ", rule->set); 899 900 /* 901 * print the optional "match probability" 902 */ 903 if (rule->cmd_len > 0) { 904 cmd = rule->cmd ; 905 if (cmd->opcode == O_PROB) { 906 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 907 double d = 1.0 * p->d[0]; 908 909 d = (d / 0x7fffffff); 910 printf("prob %f ", d); 911 } 912 } 913 914 /* 915 * first print actions 916 */ 917 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 918 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 919 switch(cmd->opcode) { 920 case O_CHECK_STATE: 921 printf("check-state"); 922 flags = HAVE_IP; /* avoid printing anything else */ 923 break; 924 925 case O_ACCEPT: 926 printf("allow"); 927 break; 928 929 case O_COUNT: 930 printf("count"); 931 break; 932 933 case O_DENY: 934 printf("deny"); 935 break; 936 937 case O_REJECT: 938 if (cmd->arg1 == ICMP_REJECT_RST) 939 printf("reset"); 940 else if (cmd->arg1 == ICMP_UNREACH_HOST) 941 printf("reject"); 942 else 943 print_reject_code(cmd->arg1); 944 break; 945 946 case O_SKIPTO: 947 printf("skipto %u", cmd->arg1); 948 break; 949 950 case O_PIPE: 951 printf("pipe %u", cmd->arg1); 952 break; 953 954 case O_QUEUE: 955 printf("queue %u", cmd->arg1); 956 break; 957 958 case O_DIVERT: 959 printf("divert %u", cmd->arg1); 960 break; 961 962 case O_TEE: 963 printf("tee %u", cmd->arg1); 964 break; 965 966 case O_FORWARD_IP: 967 { 968 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 969 970 printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 971 if (s->sa.sin_port) 972 printf(",%d", s->sa.sin_port); 973 } 974 break; 975 976 case O_LOG: /* O_LOG is printed last */ 977 logptr = (ipfw_insn_log *)cmd; 978 break; 979 980 default: 981 printf("** unrecognized action %d len %d", 982 cmd->opcode, cmd->len); 983 } 984 } 985 if (logptr) { 986 if (logptr->max_log > 0) 987 printf(" log logamount %d", logptr->max_log); 988 else 989 printf(" log"); 990 } 991 992 /* 993 * then print the body. 994 */ 995 if (rule->_pad & 1) { /* empty rules before options */ 996 if (!do_compact) 997 printf(" ip from any to any"); 998 flags |= HAVE_IP | HAVE_OPTIONS; 999 } 1000 1001 for (l = rule->act_ofs, cmd = rule->cmd ; 1002 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1003 /* useful alias */ 1004 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1005 1006 show_prerequisites(&flags, 0, cmd->opcode); 1007 1008 switch(cmd->opcode) { 1009 case O_PROB: 1010 break; /* done already */ 1011 1012 case O_PROBE_STATE: 1013 break; /* no need to print anything here */ 1014 1015 case O_MACADDR2: { 1016 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1017 1018 if ((cmd->len & F_OR) && !or_block) 1019 printf(" {"); 1020 if (cmd->len & F_NOT) 1021 printf(" not"); 1022 printf(" MAC"); 1023 flags |= HAVE_MAC; 1024 print_mac( m->addr, m->mask); 1025 print_mac( m->addr + 6, m->mask + 6); 1026 } 1027 break; 1028 1029 case O_MAC_TYPE: 1030 if ((cmd->len & F_OR) && !or_block) 1031 printf(" {"); 1032 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, 1033 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1034 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; 1035 break; 1036 1037 case O_IP_SRC: 1038 case O_IP_SRC_MASK: 1039 case O_IP_SRC_ME: 1040 case O_IP_SRC_SET: 1041 show_prerequisites(&flags, HAVE_PROTO, 0); 1042 if (!(flags & HAVE_SRCIP)) 1043 printf(" from"); 1044 if ((cmd->len & F_OR) && !or_block) 1045 printf(" {"); 1046 print_ip((ipfw_insn_ip *)cmd, 1047 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1048 flags |= HAVE_SRCIP; 1049 break; 1050 1051 case O_IP_DST: 1052 case O_IP_DST_MASK: 1053 case O_IP_DST_ME: 1054 case O_IP_DST_SET: 1055 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1056 if (!(flags & HAVE_DSTIP)) 1057 printf(" to"); 1058 if ((cmd->len & F_OR) && !or_block) 1059 printf(" {"); 1060 print_ip((ipfw_insn_ip *)cmd, 1061 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1062 flags |= HAVE_DSTIP; 1063 break; 1064 1065 case O_IP_DSTPORT: 1066 show_prerequisites(&flags, HAVE_IP, 0); 1067 case O_IP_SRCPORT: 1068 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1069 if ((cmd->len & F_OR) && !or_block) 1070 printf(" {"); 1071 print_newports((ipfw_insn_u16 *)cmd, proto, 1072 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1073 break; 1074 1075 case O_PROTO: { 1076 struct protoent *pe; 1077 1078 if ((cmd->len & F_OR) && !or_block) 1079 printf(" {"); 1080 if (cmd->len & F_NOT) 1081 printf(" not"); 1082 proto = cmd->arg1; 1083 pe = getprotobynumber(cmd->arg1); 1084 if (flags & HAVE_OPTIONS) 1085 printf(" proto"); 1086 if (pe) 1087 printf(" %s", pe->p_name); 1088 else 1089 printf(" %u", cmd->arg1); 1090 } 1091 flags |= HAVE_PROTO; 1092 break; 1093 1094 default: /*options ... */ 1095 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); 1096 if ((cmd->len & F_OR) && !or_block) 1097 printf(" {"); 1098 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1099 printf(" not"); 1100 switch(cmd->opcode) { 1101 case O_FRAG: 1102 printf(" frag"); 1103 break; 1104 1105 case O_IN: 1106 printf(cmd->len & F_NOT ? " out" : " in"); 1107 break; 1108 1109 case O_LAYER2: 1110 printf(" layer2"); 1111 break; 1112 case O_XMIT: 1113 case O_RECV: 1114 case O_VIA: { 1115 char *s; 1116 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1117 1118 if (cmd->opcode == O_XMIT) 1119 s = "xmit"; 1120 else if (cmd->opcode == O_RECV) 1121 s = "recv"; 1122 else if (cmd->opcode == O_VIA) 1123 s = "via"; 1124 if (cmdif->name[0] == '\0') 1125 printf(" %s %s", s, 1126 inet_ntoa(cmdif->p.ip)); 1127 else if (cmdif->p.unit == -1) 1128 printf(" %s %s*", s, cmdif->name); 1129 else 1130 printf(" %s %s%d", s, cmdif->name, 1131 cmdif->p.unit); 1132 } 1133 break; 1134 1135 case O_IPID: 1136 if (F_LEN(cmd) == 1) 1137 printf(" ipid %u", cmd->arg1 ); 1138 else 1139 print_newports((ipfw_insn_u16 *)cmd, 0, 1140 O_IPID); 1141 break; 1142 1143 case O_IPTTL: 1144 if (F_LEN(cmd) == 1) 1145 printf(" ipttl %u", cmd->arg1 ); 1146 else 1147 print_newports((ipfw_insn_u16 *)cmd, 0, 1148 O_IPTTL); 1149 break; 1150 1151 case O_IPVER: 1152 printf(" ipver %u", cmd->arg1 ); 1153 break; 1154 1155 case O_IPPRECEDENCE: 1156 printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1157 break; 1158 1159 case O_IPLEN: 1160 if (F_LEN(cmd) == 1) 1161 printf(" iplen %u", cmd->arg1 ); 1162 else 1163 print_newports((ipfw_insn_u16 *)cmd, 0, 1164 O_IPLEN); 1165 break; 1166 1167 case O_IPOPT: 1168 print_flags("ipoptions", cmd, f_ipopts); 1169 break; 1170 1171 case O_IPTOS: 1172 print_flags("iptos", cmd, f_iptos); 1173 break; 1174 1175 case O_ICMPTYPE: 1176 print_icmptypes((ipfw_insn_u32 *)cmd); 1177 break; 1178 1179 case O_ESTAB: 1180 printf(" established"); 1181 break; 1182 1183 case O_TCPFLAGS: 1184 print_flags("tcpflags", cmd, f_tcpflags); 1185 break; 1186 1187 case O_TCPOPTS: 1188 print_flags("tcpoptions", cmd, f_tcpopts); 1189 break; 1190 1191 case O_TCPWIN: 1192 printf(" tcpwin %d", ntohs(cmd->arg1)); 1193 break; 1194 1195 case O_TCPACK: 1196 printf(" tcpack %d", ntohl(cmd32->d[0])); 1197 break; 1198 1199 case O_TCPSEQ: 1200 printf(" tcpseq %d", ntohl(cmd32->d[0])); 1201 break; 1202 1203 case O_UID: 1204 { 1205 struct passwd *pwd = getpwuid(cmd32->d[0]); 1206 1207 if (pwd) 1208 printf(" uid %s", pwd->pw_name); 1209 else 1210 printf(" uid %u", cmd32->d[0]); 1211 } 1212 break; 1213 1214 case O_GID: 1215 { 1216 struct group *grp = getgrgid(cmd32->d[0]); 1217 1218 if (grp) 1219 printf(" gid %s", grp->gr_name); 1220 else 1221 printf(" gid %u", cmd32->d[0]); 1222 } 1223 break; 1224 1225 case O_VERREVPATH: 1226 printf(" verrevpath"); 1227 break; 1228 1229 case O_KEEP_STATE: 1230 printf(" keep-state"); 1231 break; 1232 1233 case O_LIMIT: 1234 { 1235 struct _s_x *p = limit_masks; 1236 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1237 u_int8_t x = c->limit_mask; 1238 char *comma = " "; 1239 1240 printf(" limit"); 1241 for ( ; p->x != 0 ; p++) 1242 if ((x & p->x) == p->x) { 1243 x &= ~p->x; 1244 printf("%s%s", comma, p->s); 1245 comma = ","; 1246 } 1247 printf(" %d", c->conn_limit); 1248 } 1249 break; 1250 1251 default: 1252 printf(" [opcode %d len %d]", 1253 cmd->opcode, cmd->len); 1254 } 1255 } 1256 if (cmd->len & F_OR) { 1257 printf(" or"); 1258 or_block = 1; 1259 } else if (or_block) { 1260 printf(" }"); 1261 or_block = 0; 1262 } 1263 } 1264 show_prerequisites(&flags, HAVE_IP, 0); 1265 1266 printf("\n"); 1267} 1268 1269static void 1270show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1271{ 1272 struct protoent *pe; 1273 struct in_addr a; 1274 uint16_t rulenum; 1275 1276 if (!do_expired) { 1277 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1278 return; 1279 } 1280 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1281 printf("%05d %*llu %*llu (%ds)", rulenum, pcwidth, 1282 align_uint64(&d->pcnt), bcwidth, 1283 align_uint64(&d->bcnt), d->expire); 1284 switch (d->dyn_type) { 1285 case O_LIMIT_PARENT: 1286 printf(" PARENT %d", d->count); 1287 break; 1288 case O_LIMIT: 1289 printf(" LIMIT"); 1290 break; 1291 case O_KEEP_STATE: /* bidir, no mask */ 1292 printf(" STATE"); 1293 break; 1294 } 1295 1296 if ((pe = getprotobynumber(d->id.proto)) != NULL) 1297 printf(" %s", pe->p_name); 1298 else 1299 printf(" proto %u", d->id.proto); 1300 1301 a.s_addr = htonl(d->id.src_ip); 1302 printf(" %s %d", inet_ntoa(a), d->id.src_port); 1303 1304 a.s_addr = htonl(d->id.dst_ip); 1305 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1306 printf("\n"); 1307} 1308 1309int 1310sort_q(const void *pa, const void *pb) 1311{ 1312 int rev = (do_sort < 0); 1313 int field = rev ? -do_sort : do_sort; 1314 long long res = 0; 1315 const struct dn_flow_queue *a = pa; 1316 const struct dn_flow_queue *b = pb; 1317 1318 switch (field) { 1319 case 1: /* pkts */ 1320 res = a->len - b->len; 1321 break; 1322 case 2: /* bytes */ 1323 res = a->len_bytes - b->len_bytes; 1324 break; 1325 1326 case 3: /* tot pkts */ 1327 res = a->tot_pkts - b->tot_pkts; 1328 break; 1329 1330 case 4: /* tot bytes */ 1331 res = a->tot_bytes - b->tot_bytes; 1332 break; 1333 } 1334 if (res < 0) 1335 res = -1; 1336 if (res > 0) 1337 res = 1; 1338 return (int)(rev ? res : -res); 1339} 1340 1341static void 1342list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q) 1343{ 1344 int l; 1345 1346 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", 1347 fs->flow_mask.proto, 1348 fs->flow_mask.src_ip, fs->flow_mask.src_port, 1349 fs->flow_mask.dst_ip, fs->flow_mask.dst_port); 1350 if (fs->rq_elements == 0) 1351 return; 1352 1353 printf("BKT Prot ___Source IP/port____ " 1354 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); 1355 if (do_sort != 0) 1356 heapsort(q, fs->rq_elements, sizeof *q, sort_q); 1357 for (l = 0; l < fs->rq_elements; l++) { 1358 struct in_addr ina; 1359 struct protoent *pe; 1360 1361 ina.s_addr = htonl(q[l].id.src_ip); 1362 printf("%3d ", q[l].hash_slot); 1363 pe = getprotobynumber(q[l].id.proto); 1364 if (pe) 1365 printf("%-4s ", pe->p_name); 1366 else 1367 printf("%4u ", q[l].id.proto); 1368 printf("%15s/%-5d ", 1369 inet_ntoa(ina), q[l].id.src_port); 1370 ina.s_addr = htonl(q[l].id.dst_ip); 1371 printf("%15s/%-5d ", 1372 inet_ntoa(ina), q[l].id.dst_port); 1373 printf("%4qu %8qu %2u %4u %3u\n", 1374 q[l].tot_pkts, q[l].tot_bytes, 1375 q[l].len, q[l].len_bytes, q[l].drops); 1376 if (verbose) 1377 printf(" S %20qd F %20qd\n", 1378 q[l].S, q[l].F); 1379 } 1380} 1381 1382static void 1383print_flowset_parms(struct dn_flow_set *fs, char *prefix) 1384{ 1385 int l; 1386 char qs[30]; 1387 char plr[30]; 1388 char red[90]; /* Display RED parameters */ 1389 1390 l = fs->qsize; 1391 if (fs->flags_fs & DN_QSIZE_IS_BYTES) { 1392 if (l >= 8192) 1393 sprintf(qs, "%d KB", l / 1024); 1394 else 1395 sprintf(qs, "%d B", l); 1396 } else 1397 sprintf(qs, "%3d sl.", l); 1398 if (fs->plr) 1399 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); 1400 else 1401 plr[0] = '\0'; 1402 if (fs->flags_fs & DN_IS_RED) /* RED parameters */ 1403 sprintf(red, 1404 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", 1405 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', 1406 1.0 * fs->w_q / (double)(1 << SCALE_RED), 1407 SCALE_VAL(fs->min_th), 1408 SCALE_VAL(fs->max_th), 1409 1.0 * fs->max_p / (double)(1 << SCALE_RED)); 1410 else 1411 sprintf(red, "droptail"); 1412 1413 printf("%s %s%s %d queues (%d buckets) %s\n", 1414 prefix, qs, plr, fs->rq_elements, fs->rq_size, red); 1415} 1416 1417static void 1418list_pipes(void *data, int nbytes, int ac, char *av[]) 1419{ 1420 u_long rulenum; 1421 void *next = data; 1422 struct dn_pipe *p = (struct dn_pipe *) data; 1423 struct dn_flow_set *fs; 1424 struct dn_flow_queue *q; 1425 int l; 1426 1427 if (ac > 0) 1428 rulenum = strtoul(*av++, NULL, 10); 1429 else 1430 rulenum = 0; 1431 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) { 1432 double b = p->bandwidth; 1433 char buf[30]; 1434 char prefix[80]; 1435 1436 if (p->next != (struct dn_pipe *)DN_IS_PIPE) 1437 break; /* done with pipes, now queues */ 1438 1439 /* 1440 * compute length, as pipe have variable size 1441 */ 1442 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); 1443 next = (void *)p + l; 1444 nbytes -= l; 1445 1446 if (rulenum != 0 && rulenum != p->pipe_nr) 1447 continue; 1448 1449 /* 1450 * Print rate (or clocking interface) 1451 */ 1452 if (p->if_name[0] != '\0') 1453 sprintf(buf, "%s", p->if_name); 1454 else if (b == 0) 1455 sprintf(buf, "unlimited"); 1456 else if (b >= 1000000) 1457 sprintf(buf, "%7.3f Mbit/s", b/1000000); 1458 else if (b >= 1000) 1459 sprintf(buf, "%7.3f Kbit/s", b/1000); 1460 else 1461 sprintf(buf, "%7.3f bit/s ", b); 1462 1463 sprintf(prefix, "%05d: %s %4d ms ", 1464 p->pipe_nr, buf, p->delay); 1465 print_flowset_parms(&(p->fs), prefix); 1466 if (verbose) 1467 printf(" V %20qd\n", p->V >> MY_M); 1468 1469 q = (struct dn_flow_queue *)(p+1); 1470 list_queues(&(p->fs), q); 1471 } 1472 for (fs = next; nbytes >= sizeof *fs; fs = next) { 1473 char prefix[80]; 1474 1475 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE) 1476 break; 1477 l = sizeof(*fs) + fs->rq_elements * sizeof(*q); 1478 next = (void *)fs + l; 1479 nbytes -= l; 1480 q = (struct dn_flow_queue *)(fs+1); 1481 sprintf(prefix, "q%05d: weight %d pipe %d ", 1482 fs->fs_nr, fs->weight, fs->parent_nr); 1483 print_flowset_parms(fs, prefix); 1484 list_queues(fs, q); 1485 } 1486} 1487 1488/* 1489 * This one handles all set-related commands 1490 * ipfw set { show | enable | disable } 1491 * ipfw set swap X Y 1492 * ipfw set move X to Y 1493 * ipfw set move rule X to Y 1494 */ 1495static void 1496sets_handler(int ac, char *av[]) 1497{ 1498 u_int32_t set_disable, masks[2]; 1499 int i, nbytes; 1500 u_int16_t rulenum; 1501 u_int8_t cmd, new_set; 1502 1503 ac--; 1504 av++; 1505 1506 if (!ac) 1507 errx(EX_USAGE, "set needs command"); 1508 if (!strncmp(*av, "show", strlen(*av)) ) { 1509 void *data; 1510 char *msg; 1511 1512 nbytes = sizeof(struct ip_fw); 1513 if ((data = malloc(nbytes)) == NULL) 1514 err(EX_OSERR, "malloc"); 1515 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) 1516 err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1517 bcopy(&((struct ip_fw *)data)->next_rule, 1518 &set_disable, sizeof(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 1598static void 1599sysctl_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 1626static void 1627list(int ac, char *av[]) 1628{ 1629 struct ip_fw *r; 1630 ipfw_dyn_rule *dynrules, *d; 1631 1632 void *lim, *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. They have variable size so we 1667 * need to scan the list to count them. 1668 */ 1669 for (nstat = 1, r = data, lim = data + nbytes; 1670 r->rulenum < 65535 && (void *)r < lim; 1671 ++nstat, r = (void *)r + RULESIZE(r) ) 1672 ; /* nothing */ 1673 1674 /* 1675 * Count dynamic rules. This is easier as they have 1676 * fixed size. 1677 */ 1678 r = (void *)r + RULESIZE(r); 1679 dynrules = (ipfw_dyn_rule *)r ; 1680 n = (void *)r - data; 1681 ndyn = (nbytes - n) / sizeof *dynrules; 1682 1683 /* if showing stats, figure out column widths ahead of time */ 1684 bcwidth = pcwidth = 0; 1685 if (do_acct) { 1686 for (n = 0, r = data; n < nstat; 1687 n++, r = (void *)r + RULESIZE(r)) { 1688 /* packet counter */ 1689 width = snprintf(NULL, 0, "%llu", 1690 align_uint64(&r->pcnt)); 1691 if (width > pcwidth) 1692 pcwidth = width; 1693 1694 /* byte counter */ 1695 width = snprintf(NULL, 0, "%llu", 1696 align_uint64(&r->bcnt)); 1697 if (width > bcwidth) 1698 bcwidth = width; 1699 } 1700 } 1701 if (do_dynamic && ndyn) { 1702 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1703 width = snprintf(NULL, 0, "%llu", 1704 align_uint64(&d->pcnt)); 1705 if (width > pcwidth) 1706 pcwidth = width; 1707 1708 width = snprintf(NULL, 0, "%llu", 1709 align_uint64(&d->bcnt)); 1710 if (width > bcwidth) 1711 bcwidth = width; 1712 } 1713 } 1714 /* if no rule numbers were specified, list all rules */ 1715 if (ac == 0) { 1716 for (n = 0, r = data; n < nstat; 1717 n++, r = (void *)r + RULESIZE(r) ) 1718 show_ipfw(r, pcwidth, bcwidth); 1719 1720 if (do_dynamic && ndyn) { 1721 printf("## Dynamic rules (%d):\n", ndyn); 1722 for (n = 0, d = dynrules; n < ndyn; n++, d++) 1723 show_dyn_ipfw(d, pcwidth, bcwidth); 1724 } 1725 goto done; 1726 } 1727 1728 /* display specific rules requested on command line */ 1729 1730 for (lac = ac, lav = av; lac != 0; lac--) { 1731 /* convert command line rule # */ 1732 rnum = strtoul(*lav++, &endptr, 10); 1733 if (*endptr) { 1734 exitval = EX_USAGE; 1735 warnx("invalid rule number: %s", *(lav - 1)); 1736 continue; 1737 } 1738 for (n = seen = 0, r = data; n < nstat; 1739 n++, r = (void *)r + RULESIZE(r) ) { 1740 if (r->rulenum > rnum) 1741 break; 1742 if (r->rulenum == rnum) { 1743 show_ipfw(r, pcwidth, bcwidth); 1744 seen = 1; 1745 } 1746 } 1747 if (!seen) { 1748 /* give precedence to other error(s) */ 1749 if (exitval == EX_OK) 1750 exitval = EX_UNAVAILABLE; 1751 warnx("rule %lu does not exist", rnum); 1752 } 1753 } 1754 1755 if (do_dynamic && ndyn) { 1756 printf("## Dynamic rules:\n"); 1757 for (lac = ac, lav = av; lac != 0; lac--) { 1758 rnum = strtoul(*lav++, &endptr, 10); 1759 if (*endptr) 1760 /* already warned */ 1761 continue; 1762 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1763 uint16_t rulenum; 1764 1765 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1766 if (rulenum > rnum) 1767 break; 1768 if (rulenum == rnum) 1769 show_dyn_ipfw(d, pcwidth, bcwidth); 1770 } 1771 } 1772 } 1773 1774 ac = 0; 1775 1776done: 1777 free(data); 1778 1779 if (exitval != EX_OK) 1780 exit(exitval); 1781} 1782 1783static void 1784show_usage(void) 1785{ 1786 fprintf(stderr, "usage: ipfw [options]\n" 1787" add [number] rule\n" 1788" pipe number config [pipeconfig]\n" 1789" queue number config [queueconfig]\n" 1790" [pipe] flush\n" 1791" [pipe] delete number ...\n" 1792" [pipe] {list|show} [number ...]\n" 1793" {zero|resetlog} [number ...]\n" 1794"do \"ipfw -h\" or see ipfw manpage for details\n" 1795); 1796 1797 exit(EX_USAGE); 1798} 1799 1800static void 1801help(void) 1802{ 1803 1804 fprintf(stderr, "ipfw syntax summary:\n" 1805"ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" 1806"ipfw {pipe|queue} N config BODY\n" 1807"ipfw [pipe] {zero|delete|show} [N{,N}]\n" 1808"\n" 1809"RULE: [1..] [PROB] BODY\n" 1810"RULENUM: INTEGER(1..65534)\n" 1811"PROB: prob REAL(0..1)\n" 1812"BODY: check-state [LOG] (no body) |\n" 1813" ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" 1814"ACTION: check-state | allow | count | deny | reject | skipto N |\n" 1815" {divert|tee} PORT | forward ADDR | pipe N | queue N\n" 1816"ADDR: [ MAC dst src ether_type ] \n" 1817" [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" 1818"IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" 1819"IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" 1820"OPTION_LIST: OPTION [,OPTION_LIST]\n" 1821); 1822exit(0); 1823} 1824 1825 1826static int 1827lookup_host (char *host, struct in_addr *ipaddr) 1828{ 1829 struct hostent *he; 1830 1831 if (!inet_aton(host, ipaddr)) { 1832 if ((he = gethostbyname(host)) == NULL) 1833 return(-1); 1834 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1835 } 1836 return(0); 1837} 1838 1839/* 1840 * fills the addr and mask fields in the instruction as appropriate from av. 1841 * Update length as appropriate. 1842 * The following formats are allowed: 1843 * any matches any IP. Actually returns an empty instruction. 1844 * me returns O_IP_*_ME 1845 * 1.2.3.4 single IP address 1846 * 1.2.3.4:5.6.7.8 address:mask 1847 * 1.2.3.4/24 address/mask 1848 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1849 */ 1850static void 1851fill_ip(ipfw_insn_ip *cmd, char *av) 1852{ 1853 char *p = 0, md = 0; 1854 u_int32_t i; 1855 1856 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 1857 1858 if (!strncmp(av, "any", strlen(av))) 1859 return; 1860 1861 if (!strncmp(av, "me", strlen(av))) { 1862 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 1863 return; 1864 } 1865 1866 p = strchr(av, '/'); 1867 if (!p) 1868 p = strchr(av, ':'); 1869 if (p) { 1870 md = *p; 1871 *p++ = '\0'; 1872 } 1873 1874 if (lookup_host(av, &cmd->addr) != 0) 1875 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 1876 switch (md) { 1877 case ':': 1878 if (!inet_aton(p, &cmd->mask)) 1879 errx(EX_DATAERR, "bad netmask ``%s''", p); 1880 break; 1881 case '/': 1882 i = atoi(p); 1883 if (i == 0) 1884 cmd->mask.s_addr = htonl(0); 1885 else if (i > 32) 1886 errx(EX_DATAERR, "bad width ``%s''", p); 1887 else 1888 cmd->mask.s_addr = htonl(~0 << (32 - i)); 1889 break; 1890 default: 1891 cmd->mask.s_addr = htonl(~0); 1892 break; 1893 } 1894 cmd->addr.s_addr &= cmd->mask.s_addr; 1895 /* 1896 * now look if we have a set of addresses. They are stored as follows: 1897 * arg1 is the set size (powers of 2, 2..256) 1898 * addr is the base address IN HOST FORMAT 1899 * mask.. is an array of u_int32_t with bits set. 1900 */ 1901 if (p) 1902 p = strchr(p, '{'); 1903 if (p) { /* fetch addresses */ 1904 u_int32_t *d; 1905 int low, high; 1906 int i = contigmask((u_char *)&(cmd->mask), 32); 1907 1908 if (i < 24 || i > 31) { 1909 fprintf(stderr, "invalid set with mask %d\n", 1910 i); 1911 exit(0); 1912 } 1913 cmd->o.arg1 = 1<<(32-i); 1914 cmd->addr.s_addr = ntohl(cmd->addr.s_addr); 1915 d = (u_int32_t *)&cmd->mask; 1916 cmd->o.opcode = O_IP_DST_SET; /* default */ 1917 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 1918 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 1919 d[i] = 0; /* clear masks */ 1920 1921 av = p+1; 1922 low = cmd->addr.s_addr & 0xff; 1923 high = low + cmd->o.arg1 - 1; 1924 i = -1; /* previous value in a range */ 1925 while (isdigit(*av)) { 1926 char *s; 1927 u_int16_t a = strtol(av, &s, 0); 1928 1929 if (s == av) /* no parameter */ 1930 break; 1931 if (a < low || a > high) { 1932 fprintf(stderr, "addr %d out of range [%d-%d]\n", 1933 a, low, high); 1934 exit(0); 1935 } 1936 a -= low; 1937 if (i == -1) /* no previous in range */ 1938 i = a; 1939 else { /* check that range is valid */ 1940 if (i > a) 1941 errx(EX_DATAERR, "invalid range %d-%d", 1942 i+low, a+low); 1943 if (*s == '-') 1944 errx(EX_DATAERR, "double '-' in range"); 1945 } 1946 for (; i <= a; i++) 1947 d[i/32] |= 1<<(i & 31); 1948 i = -1; 1949 if (*s == '-') 1950 i = a; 1951 else if (*s != ',') 1952 break; 1953 av = s+1; 1954 } 1955 return; 1956 } 1957 1958 if (cmd->mask.s_addr == 0) { /* any */ 1959 if (cmd->o.len & F_NOT) 1960 errx(EX_DATAERR, "not any never matches"); 1961 else /* useless, nuke it */ 1962 return; 1963 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ 1964 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1965 else /* addr/mask */ 1966 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); 1967} 1968 1969 1970/* 1971 * helper function to process a set of flags and set bits in the 1972 * appropriate masks. 1973 */ 1974static void 1975fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 1976 struct _s_x *flags, char *p) 1977{ 1978 u_int8_t set=0, clear=0; 1979 1980 while (p && *p) { 1981 char *q; /* points to the separator */ 1982 int val; 1983 u_int8_t *which; /* mask we are working on */ 1984 1985 if (*p == '!') { 1986 p++; 1987 which = &clear; 1988 } else 1989 which = &set; 1990 q = strchr(p, ','); 1991 if (q) 1992 *q++ = '\0'; 1993 val = match_token(flags, p); 1994 if (val <= 0) 1995 errx(EX_DATAERR, "invalid flag %s", p); 1996 *which |= (u_int8_t)val; 1997 p = q; 1998 } 1999 cmd->opcode = opcode; 2000 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2001 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2002} 2003 2004 2005static void 2006delete(int ac, char *av[]) 2007{ 2008 u_int32_t rulenum; 2009 struct dn_pipe pipe; 2010 int i; 2011 int exitval = EX_OK; 2012 int do_set = 0; 2013 2014 memset(&pipe, 0, sizeof pipe); 2015 2016 av++; ac--; 2017 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { 2018 do_set = 1; /* delete set */ 2019 ac--; av++; 2020 } 2021 2022 /* Rule number */ 2023 while (ac && isdigit(**av)) { 2024 i = atoi(*av); av++; ac--; 2025 if (do_pipe) { 2026 if (do_pipe == 1) 2027 pipe.pipe_nr = i; 2028 else 2029 pipe.fs.fs_nr = i; 2030 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, 2031 &pipe, sizeof pipe); 2032 if (i) { 2033 exitval = 1; 2034 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", 2035 do_pipe == 1 ? pipe.pipe_nr : 2036 pipe.fs.fs_nr); 2037 } 2038 } else { 2039 rulenum = (i & 0xffff) | (do_set << 24); 2040 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, 2041 sizeof rulenum); 2042 if (i) { 2043 exitval = EX_UNAVAILABLE; 2044 warn("rule %u: setsockopt(IP_FW_DEL)", 2045 rulenum); 2046 } 2047 } 2048 } 2049 if (exitval != EX_OK) 2050 exit(exitval); 2051} 2052 2053 2054/* 2055 * fill the interface structure. We do not check the name as we can 2056 * create interfaces dynamically, so checking them at insert time 2057 * makes relatively little sense. 2058 * A '*' following the name means any unit. 2059 */ 2060static void 2061fill_iface(ipfw_insn_if *cmd, char *arg) 2062{ 2063 cmd->name[0] = '\0'; 2064 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2065 2066 /* Parse the interface or address */ 2067 if (!strcmp(arg, "any")) 2068 cmd->o.len = 0; /* effectively ignore this command */ 2069 else if (!isdigit(*arg)) { 2070 char *q; 2071 2072 strncpy(cmd->name, arg, sizeof(cmd->name)); 2073 cmd->name[sizeof(cmd->name) - 1] = '\0'; 2074 /* find first digit or wildcard */ 2075 for (q = cmd->name; *q && !isdigit(*q) && *q != '*'; q++) 2076 continue; 2077 cmd->p.unit = (*q == '*') ? -1 : atoi(q); 2078 *q = '\0'; 2079 } else if (!inet_aton(arg, &cmd->p.ip)) 2080 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2081} 2082 2083/* 2084 * the following macro returns an error message if we run out of 2085 * arguments. 2086 */ 2087#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} 2088 2089static void 2090config_pipe(int ac, char **av) 2091{ 2092 struct dn_pipe pipe; 2093 int i; 2094 char *end; 2095 u_int32_t a; 2096 void *par = NULL; 2097 2098 memset(&pipe, 0, sizeof pipe); 2099 2100 av++; ac--; 2101 /* Pipe number */ 2102 if (ac && isdigit(**av)) { 2103 i = atoi(*av); av++; ac--; 2104 if (do_pipe == 1) 2105 pipe.pipe_nr = i; 2106 else 2107 pipe.fs.fs_nr = i; 2108 } 2109 while (ac > 0) { 2110 double d; 2111 int tok = match_token(dummynet_params, *av); 2112 ac--; av++; 2113 2114 switch(tok) { 2115 case TOK_NOERROR: 2116 pipe.fs.flags_fs |= DN_NOERROR; 2117 break; 2118 2119 case TOK_PLR: 2120 NEED1("plr needs argument 0..1\n"); 2121 d = strtod(av[0], NULL); 2122 if (d > 1) 2123 d = 1; 2124 else if (d < 0) 2125 d = 0; 2126 pipe.fs.plr = (int)(d*0x7fffffff); 2127 ac--; av++; 2128 break; 2129 2130 case TOK_QUEUE: 2131 NEED1("queue needs queue size\n"); 2132 end = NULL; 2133 pipe.fs.qsize = strtoul(av[0], &end, 0); 2134 if (*end == 'K' || *end == 'k') { 2135 pipe.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2136 pipe.fs.qsize *= 1024; 2137 } else if (*end == 'B' || !strncmp(end, "by", 2)) { 2138 pipe.fs.flags_fs |= DN_QSIZE_IS_BYTES; 2139 } 2140 ac--; av++; 2141 break; 2142 2143 case TOK_BUCKETS: 2144 NEED1("buckets needs argument\n"); 2145 pipe.fs.rq_size = strtoul(av[0], NULL, 0); 2146 ac--; av++; 2147 break; 2148 2149 case TOK_MASK: 2150 NEED1("mask needs mask specifier\n"); 2151 /* 2152 * per-flow queue, mask is dst_ip, dst_port, 2153 * src_ip, src_port, proto measured in bits 2154 */ 2155 par = NULL; 2156 2157 pipe.fs.flow_mask.dst_ip = 0; 2158 pipe.fs.flow_mask.src_ip = 0; 2159 pipe.fs.flow_mask.dst_port = 0; 2160 pipe.fs.flow_mask.src_port = 0; 2161 pipe.fs.flow_mask.proto = 0; 2162 end = NULL; 2163 2164 while (ac >= 1) { 2165 u_int32_t *p32 = NULL; 2166 u_int16_t *p16 = NULL; 2167 2168 tok = match_token(dummynet_params, *av); 2169 ac--; av++; 2170 switch(tok) { 2171 case TOK_ALL: 2172 /* 2173 * special case, all bits significant 2174 */ 2175 pipe.fs.flow_mask.dst_ip = ~0; 2176 pipe.fs.flow_mask.src_ip = ~0; 2177 pipe.fs.flow_mask.dst_port = ~0; 2178 pipe.fs.flow_mask.src_port = ~0; 2179 pipe.fs.flow_mask.proto = ~0; 2180 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2181 goto end_mask; 2182 2183 case TOK_DSTIP: 2184 p32 = &pipe.fs.flow_mask.dst_ip; 2185 break; 2186 2187 case TOK_SRCIP: 2188 p32 = &pipe.fs.flow_mask.src_ip; 2189 break; 2190 2191 case TOK_DSTPORT: 2192 p16 = &pipe.fs.flow_mask.dst_port; 2193 break; 2194 2195 case TOK_SRCPORT: 2196 p16 = &pipe.fs.flow_mask.src_port; 2197 break; 2198 2199 case TOK_PROTO: 2200 break; 2201 2202 default: 2203 ac++; av--; /* backtrack */ 2204 goto end_mask; 2205 } 2206 if (ac < 1) 2207 errx(EX_USAGE, "mask: value missing"); 2208 if (*av[0] == '/') { 2209 a = strtoul(av[0]+1, &end, 0); 2210 a = (a == 32) ? ~0 : (1 << a) - 1; 2211 } else 2212 a = strtoul(av[0], &end, 0); 2213 if (p32 != NULL) 2214 *p32 = a; 2215 else if (p16 != NULL) { 2216 if (a > 65535) 2217 errx(EX_DATAERR, 2218 "mask: must be 16 bit"); 2219 *p16 = (u_int16_t)a; 2220 } else { 2221 if (a > 255) 2222 errx(EX_DATAERR, 2223 "mask: must be 8 bit"); 2224 pipe.fs.flow_mask.proto = (u_int8_t)a; 2225 } 2226 if (a != 0) 2227 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; 2228 ac--; av++; 2229 } /* end while, config masks */ 2230end_mask: 2231 break; 2232 2233 case TOK_RED: 2234 case TOK_GRED: 2235 NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); 2236 pipe.fs.flags_fs |= DN_IS_RED; 2237 if (tok == TOK_GRED) 2238 pipe.fs.flags_fs |= DN_IS_GENTLE_RED; 2239 /* 2240 * the format for parameters is w_q/min_th/max_th/max_p 2241 */ 2242 if ((end = strsep(&av[0], "/"))) { 2243 double w_q = strtod(end, NULL); 2244 if (w_q > 1 || w_q <= 0) 2245 errx(EX_DATAERR, "0 < w_q <= 1"); 2246 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); 2247 } 2248 if ((end = strsep(&av[0], "/"))) { 2249 pipe.fs.min_th = strtoul(end, &end, 0); 2250 if (*end == 'K' || *end == 'k') 2251 pipe.fs.min_th *= 1024; 2252 } 2253 if ((end = strsep(&av[0], "/"))) { 2254 pipe.fs.max_th = strtoul(end, &end, 0); 2255 if (*end == 'K' || *end == 'k') 2256 pipe.fs.max_th *= 1024; 2257 } 2258 if ((end = strsep(&av[0], "/"))) { 2259 double max_p = strtod(end, NULL); 2260 if (max_p > 1 || max_p <= 0) 2261 errx(EX_DATAERR, "0 < max_p <= 1"); 2262 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); 2263 } 2264 ac--; av++; 2265 break; 2266 2267 case TOK_DROPTAIL: 2268 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); 2269 break; 2270 2271 case TOK_BW: 2272 NEED1("bw needs bandwidth or interface\n"); 2273 if (do_pipe != 1) 2274 errx(EX_DATAERR, "bandwidth only valid for pipes"); 2275 /* 2276 * set clocking interface or bandwidth value 2277 */ 2278 if (av[0][0] >= 'a' && av[0][0] <= 'z') { 2279 int l = sizeof(pipe.if_name)-1; 2280 /* interface name */ 2281 strncpy(pipe.if_name, av[0], l); 2282 pipe.if_name[l] = '\0'; 2283 pipe.bandwidth = 0; 2284 } else { 2285 pipe.if_name[0] = '\0'; 2286 pipe.bandwidth = strtoul(av[0], &end, 0); 2287 if (*end == 'K' || *end == 'k') { 2288 end++; 2289 pipe.bandwidth *= 1000; 2290 } else if (*end == 'M') { 2291 end++; 2292 pipe.bandwidth *= 1000000; 2293 } 2294 if (*end == 'B' || !strncmp(end, "by", 2)) 2295 pipe.bandwidth *= 8; 2296 if (pipe.bandwidth < 0) 2297 errx(EX_DATAERR, "bandwidth too large"); 2298 } 2299 ac--; av++; 2300 break; 2301 2302 case TOK_DELAY: 2303 if (do_pipe != 1) 2304 errx(EX_DATAERR, "delay only valid for pipes"); 2305 NEED1("delay needs argument 0..10000ms\n"); 2306 pipe.delay = strtoul(av[0], NULL, 0); 2307 ac--; av++; 2308 break; 2309 2310 case TOK_WEIGHT: 2311 if (do_pipe == 1) 2312 errx(EX_DATAERR,"weight only valid for queues"); 2313 NEED1("weight needs argument 0..100\n"); 2314 pipe.fs.weight = strtoul(av[0], &end, 0); 2315 ac--; av++; 2316 break; 2317 2318 case TOK_PIPE: 2319 if (do_pipe == 1) 2320 errx(EX_DATAERR,"pipe only valid for queues"); 2321 NEED1("pipe needs pipe_number\n"); 2322 pipe.fs.parent_nr = strtoul(av[0], &end, 0); 2323 ac--; av++; 2324 break; 2325 2326 default: 2327 errx(EX_DATAERR, "unrecognised option ``%s''", *av); 2328 } 2329 } 2330 if (do_pipe == 1) { 2331 if (pipe.pipe_nr == 0) 2332 errx(EX_DATAERR, "pipe_nr must be > 0"); 2333 if (pipe.delay > 10000) 2334 errx(EX_DATAERR, "delay must be < 10000"); 2335 } else { /* do_pipe == 2, queue */ 2336 if (pipe.fs.parent_nr == 0) 2337 errx(EX_DATAERR, "pipe must be > 0"); 2338 if (pipe.fs.weight >100) 2339 errx(EX_DATAERR, "weight must be <= 100"); 2340 } 2341 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { 2342 if (pipe.fs.qsize > 1024*1024) 2343 errx(EX_DATAERR, "queue size must be < 1MB"); 2344 } else { 2345 if (pipe.fs.qsize > 100) 2346 errx(EX_DATAERR, "2 <= queue size <= 100"); 2347 } 2348 if (pipe.fs.flags_fs & DN_IS_RED) { 2349 size_t len; 2350 int lookup_depth, avg_pkt_size; 2351 double s, idle, weight, w_q; 2352 struct clockinfo clock; 2353 int t; 2354 2355 if (pipe.fs.min_th >= pipe.fs.max_th) 2356 errx(EX_DATAERR, "min_th %d must be < than max_th %d", 2357 pipe.fs.min_th, pipe.fs.max_th); 2358 if (pipe.fs.max_th == 0) 2359 errx(EX_DATAERR, "max_th must be > 0"); 2360 2361 len = sizeof(int); 2362 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", 2363 &lookup_depth, &len, NULL, 0) == -1) 2364 2365 errx(1, "sysctlbyname(\"%s\")", 2366 "net.inet.ip.dummynet.red_lookup_depth"); 2367 if (lookup_depth == 0) 2368 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" 2369 " must be greater than zero"); 2370 2371 len = sizeof(int); 2372 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", 2373 &avg_pkt_size, &len, NULL, 0) == -1) 2374 2375 errx(1, "sysctlbyname(\"%s\")", 2376 "net.inet.ip.dummynet.red_avg_pkt_size"); 2377 if (avg_pkt_size == 0) 2378 errx(EX_DATAERR, 2379 "net.inet.ip.dummynet.red_avg_pkt_size must" 2380 " be greater than zero"); 2381 2382 len = sizeof(struct clockinfo); 2383 if (sysctlbyname("kern.clockrate", &clock, &len, NULL, 0) == -1) 2384 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate"); 2385 2386 /* 2387 * Ticks needed for sending a medium-sized packet. 2388 * Unfortunately, when we are configuring a WF2Q+ queue, we 2389 * do not have bandwidth information, because that is stored 2390 * in the parent pipe, and also we have multiple queues 2391 * competing for it. So we set s=0, which is not very 2392 * correct. But on the other hand, why do we want RED with 2393 * WF2Q+ ? 2394 */ 2395 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ 2396 s = 0; 2397 else 2398 s = clock.hz * avg_pkt_size * 8 / pipe.bandwidth; 2399 2400 /* 2401 * max idle time (in ticks) before avg queue size becomes 0. 2402 * NOTA: (3/w_q) is approx the value x so that 2403 * (1-w_q)^x < 10^-3. 2404 */ 2405 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); 2406 idle = s * 3. / w_q; 2407 pipe.fs.lookup_step = (int)idle / lookup_depth; 2408 if (!pipe.fs.lookup_step) 2409 pipe.fs.lookup_step = 1; 2410 weight = 1 - w_q; 2411 for (t = pipe.fs.lookup_step; t > 0; --t) 2412 weight *= weight; 2413 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); 2414 } 2415 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, 2416 sizeof pipe); 2417 if (i) 2418 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); 2419} 2420 2421static void 2422get_mac_addr_mask(char *p, u_char *addr, u_char *mask) 2423{ 2424 int i, l; 2425 2426 for (i=0; i<6; i++) 2427 addr[i] = mask[i] = 0; 2428 if (!strcmp(p, "any")) 2429 return; 2430 2431 for (i=0; *p && i<6;i++, p++) { 2432 addr[i] = strtol(p, &p, 16); 2433 if (*p != ':') /* we start with the mask */ 2434 break; 2435 } 2436 if (*p == '/') { /* mask len */ 2437 l = strtol(p+1, &p, 0); 2438 for (i=0; l>0; l -=8, i++) 2439 mask[i] = (l >=8) ? 0xff : (~0) << (8-l); 2440 } else if (*p == '&') { /* mask */ 2441 for (i=0, p++; *p && i<6;i++, p++) { 2442 mask[i] = strtol(p, &p, 16); 2443 if (*p != ':') 2444 break; 2445 } 2446 } else if (*p == '\0') { 2447 for (i=0; i<6; i++) 2448 mask[i] = 0xff; 2449 } 2450 for (i=0; i<6; i++) 2451 addr[i] &= mask[i]; 2452} 2453 2454/* 2455 * helper function, updates the pointer to cmd with the length 2456 * of the current command, and also cleans up the first word of 2457 * the new command in case it has been clobbered before. 2458 */ 2459static ipfw_insn * 2460next_cmd(ipfw_insn *cmd) 2461{ 2462 cmd += F_LEN(cmd); 2463 bzero(cmd, sizeof(*cmd)); 2464 return cmd; 2465} 2466 2467/* 2468 * A function to fill simple commands of size 1. 2469 * Existing flags are preserved. 2470 */ 2471static void 2472fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) 2473{ 2474 cmd->opcode = opcode; 2475 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2476 cmd->arg1 = arg; 2477} 2478 2479/* 2480 * Fetch and add the MAC address and type, with masks. This generates one or 2481 * two microinstructions, and returns the pointer to the last one. 2482 */ 2483static ipfw_insn * 2484add_mac(ipfw_insn *cmd, int ac, char *av[]) 2485{ 2486 ipfw_insn_mac *mac; 2487 2488 if (ac < 2) 2489 errx(EX_DATAERR, "MAC dst src"); 2490 2491 cmd->opcode = O_MACADDR2; 2492 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2493 2494 mac = (ipfw_insn_mac *)cmd; 2495 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2496 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ 2497 return cmd; 2498} 2499 2500static ipfw_insn * 2501add_mactype(ipfw_insn *cmd, int ac, char *av) 2502{ 2503 if (ac < 1) 2504 errx(EX_DATAERR, "missing MAC type"); 2505 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2506 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2507 cmd->opcode = O_MAC_TYPE; 2508 return cmd; 2509 } else 2510 return NULL; 2511} 2512 2513static ipfw_insn * 2514add_proto(ipfw_insn *cmd, char *av) 2515{ 2516 struct protoent *pe; 2517 u_char proto = 0; 2518 2519 if (!strncmp(av, "all", strlen(av))) 2520 ; /* same as "ip" */ 2521 else if ((proto = atoi(av)) > 0) 2522 ; /* all done! */ 2523 else if ((pe = getprotobyname(av)) != NULL) 2524 proto = pe->p_proto; 2525 else 2526 return NULL; 2527 if (proto != IPPROTO_IP) 2528 fill_cmd(cmd, O_PROTO, 0, proto); 2529 return cmd; 2530} 2531 2532static ipfw_insn * 2533add_srcip(ipfw_insn *cmd, char *av) 2534{ 2535 fill_ip((ipfw_insn_ip *)cmd, av); 2536 if (cmd->opcode == O_IP_DST_SET) /* set */ 2537 cmd->opcode = O_IP_SRC_SET; 2538 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2539 cmd->opcode = O_IP_SRC_ME; 2540 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2541 cmd->opcode = O_IP_SRC; 2542 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2543 cmd->opcode = O_IP_SRC_MASK; 2544 return cmd; 2545} 2546 2547static ipfw_insn * 2548add_dstip(ipfw_insn *cmd, char *av) 2549{ 2550 fill_ip((ipfw_insn_ip *)cmd, av); 2551 if (cmd->opcode == O_IP_DST_SET) /* set */ 2552 ; 2553 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2554 cmd->opcode = O_IP_DST_ME; 2555 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2556 cmd->opcode = O_IP_DST; 2557 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ 2558 cmd->opcode = O_IP_DST_MASK; 2559 return cmd; 2560} 2561 2562static ipfw_insn * 2563add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2564{ 2565 if (!strncmp(av, "any", strlen(av))) { 2566 return NULL; 2567 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2568 /* XXX todo: check that we have a protocol with ports */ 2569 cmd->opcode = opcode; 2570 return cmd; 2571 } 2572 return NULL; 2573} 2574 2575/* 2576 * Parse arguments and assemble the microinstructions which make up a rule. 2577 * Rules are added into the 'rulebuf' and then copied in the correct order 2578 * into the actual rule. 2579 * 2580 * The syntax for a rule starts with the action, followed by an 2581 * optional log action, and the various match patterns. 2582 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 2583 * (generated if the rule includes a keep-state option), then the 2584 * various match patterns, the "log" action, and the actual action. 2585 * 2586 */ 2587static void 2588add(int ac, char *av[]) 2589{ 2590 /* 2591 * rules are added into the 'rulebuf' and then copied in 2592 * the correct order into the actual rule. 2593 * Some things that need to go out of order (prob, action etc.) 2594 * go into actbuf[]. 2595 */ 2596 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2597 2598 ipfw_insn *src, *dst, *cmd, *action, *prev; 2599 ipfw_insn *first_cmd; /* first match pattern */ 2600 2601 struct ip_fw *rule; 2602 2603 /* 2604 * various flags used to record that we entered some fields. 2605 */ 2606 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2607 2608 int i; 2609 2610 int open_par = 0; /* open parenthesis ( */ 2611 2612 /* proto is here because it is used to fetch ports */ 2613 u_char proto = IPPROTO_IP; /* default protocol */ 2614 2615 double match_prob = 1; /* match probability, default is always match */ 2616 2617 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2618 bzero(cmdbuf, sizeof(cmdbuf)); 2619 bzero(rulebuf, sizeof(rulebuf)); 2620 2621 rule = (struct ip_fw *)rulebuf; 2622 cmd = (ipfw_insn *)cmdbuf; 2623 action = (ipfw_insn *)actbuf; 2624 2625 av++; ac--; 2626 2627 /* [rule N] -- Rule number optional */ 2628 if (ac && isdigit(**av)) { 2629 rule->rulenum = atoi(*av); 2630 av++; 2631 ac--; 2632 } 2633 2634 /* [set N] -- set number (0..30), optional */ 2635 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { 2636 int set = strtoul(av[1], NULL, 10); 2637 if (set < 0 || set > 30) 2638 errx(EX_DATAERR, "illegal set %s", av[1]); 2639 rule->set = set; 2640 av += 2; ac -= 2; 2641 } 2642 2643 /* [prob D] -- match probability, optional */ 2644 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { 2645 match_prob = strtod(av[1], NULL); 2646 2647 if (match_prob <= 0 || match_prob > 1) 2648 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2649 av += 2; ac -= 2; 2650 } 2651 2652 /* action -- mandatory */ 2653 NEED1("missing action"); 2654 i = match_token(rule_actions, *av); 2655 ac--; av++; 2656 action->len = 1; /* default */ 2657 switch(i) { 2658 case TOK_CHECKSTATE: 2659 have_state = action; 2660 action->opcode = O_CHECK_STATE; 2661 break; 2662 2663 case TOK_ACCEPT: 2664 action->opcode = O_ACCEPT; 2665 break; 2666 2667 case TOK_DENY: 2668 action->opcode = O_DENY; 2669 action->arg1 = 0; 2670 break; 2671 2672 case TOK_REJECT: 2673 action->opcode = O_REJECT; 2674 action->arg1 = ICMP_UNREACH_HOST; 2675 break; 2676 2677 case TOK_RESET: 2678 action->opcode = O_REJECT; 2679 action->arg1 = ICMP_REJECT_RST; 2680 break; 2681 2682 case TOK_UNREACH: 2683 action->opcode = O_REJECT; 2684 NEED1("missing reject code"); 2685 fill_reject_code(&action->arg1, *av); 2686 ac--; av++; 2687 break; 2688 2689 case TOK_COUNT: 2690 action->opcode = O_COUNT; 2691 break; 2692 2693 case TOK_QUEUE: 2694 case TOK_PIPE: 2695 action->len = F_INSN_SIZE(ipfw_insn_pipe); 2696 case TOK_SKIPTO: 2697 if (i == TOK_QUEUE) 2698 action->opcode = O_QUEUE; 2699 else if (i == TOK_PIPE) 2700 action->opcode = O_PIPE; 2701 else if (i == TOK_SKIPTO) 2702 action->opcode = O_SKIPTO; 2703 NEED1("missing skipto/pipe/queue number"); 2704 action->arg1 = strtoul(*av, NULL, 10); 2705 av++; ac--; 2706 break; 2707 2708 case TOK_DIVERT: 2709 case TOK_TEE: 2710 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; 2711 NEED1("missing divert/tee port"); 2712 action->arg1 = strtoul(*av, NULL, 0); 2713 if (action->arg1 == 0) { 2714 struct servent *s; 2715 setservent(1); 2716 s = getservbyname(av[0], "divert"); 2717 if (s != NULL) 2718 action->arg1 = ntohs(s->s_port); 2719 else 2720 errx(EX_DATAERR, "illegal divert/tee port"); 2721 } 2722 ac--; av++; 2723 break; 2724 2725 case TOK_FORWARD: { 2726 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2727 char *s, *end; 2728 2729 NEED1("missing forward address[:port]"); 2730 2731 action->opcode = O_FORWARD_IP; 2732 action->len = F_INSN_SIZE(ipfw_insn_sa); 2733 2734 p->sa.sin_len = sizeof(struct sockaddr_in); 2735 p->sa.sin_family = AF_INET; 2736 p->sa.sin_port = 0; 2737 /* 2738 * locate the address-port separator (':' or ',') 2739 */ 2740 s = strchr(*av, ':'); 2741 if (s == NULL) 2742 s = strchr(*av, ','); 2743 if (s != NULL) { 2744 *(s++) = '\0'; 2745 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2746 if (s == end) 2747 errx(EX_DATAERR, 2748 "illegal forwarding port ``%s''", s); 2749 p->sa.sin_port = (u_short)i; 2750 } 2751 lookup_host(*av, &(p->sa.sin_addr)); 2752 } 2753 ac--; av++; 2754 break; 2755 2756 default: 2757 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2758 } 2759 action = next_cmd(action); 2760 2761 /* 2762 * [log [logamount N]] -- log, optional 2763 * 2764 * If exists, it goes first in the cmdbuf, but then it is 2765 * skipped in the copy section to the end of the buffer. 2766 */ 2767 if (ac && !strncmp(*av, "log", strlen(*av))) { 2768 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2769 2770 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2771 cmd->opcode = O_LOG; 2772 av++; ac--; 2773 if (ac && !strncmp(*av, "logamount", strlen(*av))) { 2774 ac--; av++; 2775 NEED1("logamount requires argument"); 2776 c->max_log = atoi(*av); 2777 if (c->max_log < 0) 2778 errx(EX_DATAERR, "logamount must be positive"); 2779 ac--; av++; 2780 } 2781 cmd = next_cmd(cmd); 2782 } 2783 2784 if (have_state) /* must be a check-state, we are done */ 2785 goto done; 2786 2787#define OR_START(target) \ 2788 if (ac && (*av[0] == '(' || *av[0] == '{')) { \ 2789 if (open_par) \ 2790 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2791 prev = NULL; \ 2792 open_par = 1; \ 2793 if ( (av[0])[1] == '\0') { \ 2794 ac--; av++; \ 2795 } else \ 2796 (*av)++; \ 2797 } \ 2798 target: \ 2799 2800 2801#define CLOSE_PAR \ 2802 if (open_par) { \ 2803 if (ac && ( \ 2804 !strncmp(*av, ")", strlen(*av)) || \ 2805 !strncmp(*av, "}", strlen(*av)) )) { \ 2806 prev = NULL; \ 2807 open_par = 0; \ 2808 ac--; av++; \ 2809 } else \ 2810 errx(EX_USAGE, "missing \")\"\n"); \ 2811 } 2812 2813#define NOT_BLOCK \ 2814 if (ac && !strncmp(*av, "not", strlen(*av))) { \ 2815 if (cmd->len & F_NOT) \ 2816 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2817 cmd->len |= F_NOT; \ 2818 ac--; av++; \ 2819 } 2820 2821#define OR_BLOCK(target) \ 2822 if (ac && !strncmp(*av, "or", strlen(*av))) { \ 2823 if (prev == NULL || open_par == 0) \ 2824 errx(EX_DATAERR, "invalid OR block"); \ 2825 prev->len |= F_OR; \ 2826 ac--; av++; \ 2827 goto target; \ 2828 } \ 2829 CLOSE_PAR; 2830 2831 first_cmd = cmd; 2832 2833#if 0 2834 /* 2835 * MAC addresses, optional. 2836 * If we have this, we skip the part "proto from src to dst" 2837 * and jump straight to the option parsing. 2838 */ 2839 NOT_BLOCK; 2840 NEED1("missing protocol"); 2841 if (!strncmp(*av, "MAC", strlen(*av)) || 2842 !strncmp(*av, "mac", strlen(*av))) { 2843 ac--; av++; /* the "MAC" keyword */ 2844 add_mac(cmd, ac, av); /* exits in case of errors */ 2845 cmd = next_cmd(cmd); 2846 ac -= 2; av += 2; /* dst-mac and src-mac */ 2847 NOT_BLOCK; 2848 NEED1("missing mac type"); 2849 if (add_mactype(cmd, ac, av[0])) 2850 cmd = next_cmd(cmd); 2851 ac--; av++; /* any or mac-type */ 2852 goto read_options; 2853 } 2854#endif 2855 2856 /* 2857 * protocol, mandatory 2858 */ 2859 OR_START(get_proto); 2860 NOT_BLOCK; 2861 NEED1("missing protocol"); 2862 if (add_proto(cmd, *av)) { 2863 av++; ac--; 2864 if (F_LEN(cmd) == 0) /* plain IP */ 2865 proto = 0; 2866 else { 2867 proto = cmd->arg1; 2868 prev = cmd; 2869 cmd = next_cmd(cmd); 2870 } 2871 } else if (first_cmd != cmd) { 2872 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 2873 } else 2874 goto read_options; 2875 OR_BLOCK(get_proto); 2876 2877 /* 2878 * "from", mandatory 2879 */ 2880 if (!ac || strncmp(*av, "from", strlen(*av))) 2881 errx(EX_USAGE, "missing ``from''"); 2882 ac--; av++; 2883 2884 /* 2885 * source IP, mandatory 2886 */ 2887 OR_START(source_ip); 2888 NOT_BLOCK; /* optional "not" */ 2889 NEED1("missing source address"); 2890 if (add_srcip(cmd, *av)) { 2891 ac--; av++; 2892 if (F_LEN(cmd) != 0) { /* ! any */ 2893 prev = cmd; 2894 cmd = next_cmd(cmd); 2895 } 2896 } 2897 OR_BLOCK(source_ip); 2898 2899 /* 2900 * source ports, optional 2901 */ 2902 NOT_BLOCK; /* optional "not" */ 2903 if (ac) { 2904 if (!strncmp(*av, "any", strlen(*av)) || 2905 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 2906 ac--; av++; 2907 if (F_LEN(cmd) != 0) 2908 cmd = next_cmd(cmd); 2909 } 2910 } 2911 2912 /* 2913 * "to", mandatory 2914 */ 2915 if (!ac || strncmp(*av, "to", strlen(*av))) 2916 errx(EX_USAGE, "missing ``to''"); 2917 av++; ac--; 2918 2919 /* 2920 * destination, mandatory 2921 */ 2922 OR_START(dest_ip); 2923 NOT_BLOCK; /* optional "not" */ 2924 NEED1("missing dst address"); 2925 if (add_dstip(cmd, *av)) { 2926 ac--; av++; 2927 if (F_LEN(cmd) != 0) { /* ! any */ 2928 prev = cmd; 2929 cmd = next_cmd(cmd); 2930 } 2931 } 2932 OR_BLOCK(dest_ip); 2933 2934 /* 2935 * dest. ports, optional 2936 */ 2937 NOT_BLOCK; /* optional "not" */ 2938 if (ac) { 2939 if (!strncmp(*av, "any", strlen(*av)) || 2940 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 2941 ac--; av++; 2942 if (F_LEN(cmd) != 0) 2943 cmd = next_cmd(cmd); 2944 } 2945 } 2946 2947read_options: 2948 if (ac && first_cmd == cmd) { 2949 /* 2950 * nothing specified so far, store in the rule to ease 2951 * printout later. 2952 */ 2953 rule->_pad = 1; 2954 } 2955 prev = NULL; 2956 while (ac) { 2957 char *s; 2958 ipfw_insn_u32 *cmd32; /* alias for cmd */ 2959 2960 s = *av; 2961 cmd32 = (ipfw_insn_u32 *)cmd; 2962 2963 if (*s == '!') { /* alternate syntax for NOT */ 2964 if (cmd->len & F_NOT) 2965 errx(EX_USAGE, "double \"not\" not allowed\n"); 2966 cmd->len = F_NOT; 2967 s++; 2968 } 2969 i = match_token(rule_options, s); 2970 ac--; av++; 2971 switch(i) { 2972 case TOK_NOT: 2973 if (cmd->len & F_NOT) 2974 errx(EX_USAGE, "double \"not\" not allowed\n"); 2975 cmd->len = F_NOT; 2976 break; 2977 2978 case TOK_OR: 2979 if (open_par == 0 || prev == NULL) 2980 errx(EX_USAGE, "invalid \"or\" block\n"); 2981 prev->len |= F_OR; 2982 break; 2983 2984 case TOK_STARTBRACE: 2985 if (open_par) 2986 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 2987 open_par = 1; 2988 break; 2989 2990 case TOK_ENDBRACE: 2991 if (!open_par) 2992 errx(EX_USAGE, "+missing \")\"\n"); 2993 open_par = 0; 2994 prev = NULL; 2995 break; 2996 2997 case TOK_IN: 2998 fill_cmd(cmd, O_IN, 0, 0); 2999 break; 3000 3001 case TOK_OUT: 3002 cmd->len ^= F_NOT; /* toggle F_NOT */ 3003 fill_cmd(cmd, O_IN, 0, 0); 3004 break; 3005 3006 case TOK_FRAG: 3007 fill_cmd(cmd, O_FRAG, 0, 0); 3008 break; 3009 3010 case TOK_LAYER2: 3011 fill_cmd(cmd, O_LAYER2, 0, 0); 3012 break; 3013 3014 case TOK_XMIT: 3015 case TOK_RECV: 3016 case TOK_VIA: 3017 NEED1("recv, xmit, via require interface name" 3018 " or address"); 3019 fill_iface((ipfw_insn_if *)cmd, av[0]); 3020 ac--; av++; 3021 if (F_LEN(cmd) == 0) /* not a valid address */ 3022 break; 3023 if (i == TOK_XMIT) 3024 cmd->opcode = O_XMIT; 3025 else if (i == TOK_RECV) 3026 cmd->opcode = O_RECV; 3027 else if (i == TOK_VIA) 3028 cmd->opcode = O_VIA; 3029 break; 3030 3031 case TOK_ICMPTYPES: 3032 NEED1("icmptypes requires list of types"); 3033 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 3034 av++; ac--; 3035 break; 3036 3037 case TOK_IPTTL: 3038 NEED1("ipttl requires TTL"); 3039 if (strpbrk(*av, "-,")) { 3040 if (!add_ports(cmd, *av, 0, O_IPTTL)) 3041 errx(EX_DATAERR, "invalid ipttl %s", *av); 3042 } else 3043 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3044 ac--; av++; 3045 break; 3046 3047 case TOK_IPID: 3048 NEED1("ipid requires id"); 3049 if (strpbrk(*av, "-,")) { 3050 if (!add_ports(cmd, *av, 0, O_IPID)) 3051 errx(EX_DATAERR, "invalid ipid %s", *av); 3052 } else 3053 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3054 ac--; av++; 3055 break; 3056 3057 case TOK_IPLEN: 3058 NEED1("iplen requires length"); 3059 if (strpbrk(*av, "-,")) { 3060 if (!add_ports(cmd, *av, 0, O_IPLEN)) 3061 errx(EX_DATAERR, "invalid ip len %s", *av); 3062 } else 3063 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3064 ac--; av++; 3065 break; 3066 3067 case TOK_IPVER: 3068 NEED1("ipver requires version"); 3069 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3070 ac--; av++; 3071 break; 3072 3073 case TOK_IPPRECEDENCE: 3074 NEED1("ipprecedence requires value"); 3075 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3076 (strtoul(*av, NULL, 0) & 7) << 5); 3077 ac--; av++; 3078 break; 3079 3080 case TOK_IPOPTS: 3081 NEED1("missing argument for ipoptions"); 3082 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3083 ac--; av++; 3084 break; 3085 3086 case TOK_IPTOS: 3087 NEED1("missing argument for iptos"); 3088 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3089 ac--; av++; 3090 break; 3091 3092 case TOK_UID: 3093 NEED1("uid requires argument"); 3094 { 3095 char *end; 3096 uid_t uid; 3097 struct passwd *pwd; 3098 3099 cmd->opcode = O_UID; 3100 uid = strtoul(*av, &end, 0); 3101 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3102 if (pwd == NULL) 3103 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3104 cmd32->d[0] = pwd->pw_uid; 3105 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3106 ac--; av++; 3107 } 3108 break; 3109 3110 case TOK_GID: 3111 NEED1("gid requires argument"); 3112 { 3113 char *end; 3114 gid_t gid; 3115 struct group *grp; 3116 3117 cmd->opcode = O_GID; 3118 gid = strtoul(*av, &end, 0); 3119 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3120 if (grp == NULL) 3121 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3122 cmd32->d[0] = grp->gr_gid; 3123 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3124 ac--; av++; 3125 } 3126 break; 3127 3128 case TOK_ESTAB: 3129 fill_cmd(cmd, O_ESTAB, 0, 0); 3130 break; 3131 3132 case TOK_SETUP: 3133 fill_cmd(cmd, O_TCPFLAGS, 0, 3134 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3135 break; 3136 3137 case TOK_TCPOPTS: 3138 NEED1("missing argument for tcpoptions"); 3139 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3140 ac--; av++; 3141 break; 3142 3143 case TOK_TCPSEQ: 3144 case TOK_TCPACK: 3145 NEED1("tcpseq/tcpack requires argument"); 3146 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3147 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3148 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3149 ac--; av++; 3150 break; 3151 3152 case TOK_TCPWIN: 3153 NEED1("tcpwin requires length"); 3154 fill_cmd(cmd, O_TCPWIN, 0, 3155 htons(strtoul(*av, NULL, 0))); 3156 ac--; av++; 3157 break; 3158 3159 case TOK_TCPFLAGS: 3160 NEED1("missing argument for tcpflags"); 3161 cmd->opcode = O_TCPFLAGS; 3162 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3163 ac--; av++; 3164 break; 3165 3166 case TOK_KEEPSTATE: 3167 if (open_par) 3168 errx(EX_USAGE, "keep-state cannot be part " 3169 "of an or block"); 3170 if (have_state) 3171 errx(EX_USAGE, "only one of keep-state " 3172 "and limit is allowed"); 3173 have_state = cmd; 3174 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3175 break; 3176 3177 case TOK_LIMIT: 3178 if (open_par) 3179 errx(EX_USAGE, "limit cannot be part " 3180 "of an or block"); 3181 if (have_state) 3182 errx(EX_USAGE, "only one of keep-state " 3183 "and limit is allowed"); 3184 NEED1("limit needs mask and # of connections"); 3185 have_state = cmd; 3186 { 3187 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3188 3189 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3190 cmd->opcode = O_LIMIT; 3191 c->limit_mask = 0; 3192 c->conn_limit = 0; 3193 for (; ac >1 ;) { 3194 int val; 3195 3196 val = match_token(limit_masks, *av); 3197 if (val <= 0) 3198 break; 3199 c->limit_mask |= val; 3200 ac--; av++; 3201 } 3202 c->conn_limit = atoi(*av); 3203 if (c->conn_limit == 0) 3204 errx(EX_USAGE, "limit: limit must be >0"); 3205 if (c->limit_mask == 0) 3206 errx(EX_USAGE, "missing limit mask"); 3207 ac--; av++; 3208 } 3209 break; 3210 3211 case TOK_PROTO: 3212 NEED1("missing protocol"); 3213 if (add_proto(cmd, *av)) { 3214 proto = cmd->arg1; 3215 ac--; av++; 3216 } else 3217 errx(EX_DATAERR, "invalid protocol ``%s''", 3218 *av); 3219 break; 3220 3221 case TOK_SRCIP: 3222 NEED1("missing source IP"); 3223 if (add_srcip(cmd, *av)) { 3224 ac--; av++; 3225 } 3226 break; 3227 3228 case TOK_DSTIP: 3229 NEED1("missing destination IP"); 3230 if (add_dstip(cmd, *av)) { 3231 ac--; av++; 3232 } 3233 break; 3234 3235 case TOK_SRCPORT: 3236 NEED1("missing source port"); 3237 if (!strncmp(*av, "any", strlen(*av)) || 3238 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3239 ac--; av++; 3240 } else 3241 errx(EX_DATAERR, "invalid source port %s", *av); 3242 break; 3243 3244 case TOK_DSTPORT: 3245 NEED1("missing destination port"); 3246 if (!strncmp(*av, "any", strlen(*av)) || 3247 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3248 ac--; av++; 3249 } else 3250 errx(EX_DATAERR, "invalid destination port %s", 3251 *av); 3252 break; 3253 3254 case TOK_MAC: 3255 if (ac < 2) 3256 errx(EX_USAGE, "MAC dst-mac src-mac"); 3257 if (add_mac(cmd, ac, av)) { 3258 ac -= 2; av += 2; 3259 } 3260 break; 3261 3262 case TOK_MACTYPE: 3263 NEED1("missing mac type"); 3264 if (!add_mactype(cmd, ac, *av)) 3265 errx(EX_DATAERR, "invalid mac type %s", *av); 3266 ac--; av++; 3267 break; 3268 3269 case TOK_VERREVPATH: 3270 fill_cmd(cmd, O_VERREVPATH, 0, 0); 3271 break; 3272 3273 default: 3274 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3275 } 3276 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3277 prev = cmd; 3278 cmd = next_cmd(cmd); 3279 } 3280 } 3281 3282done: 3283 /* 3284 * Now copy stuff into the rule. 3285 * If we have a keep-state option, the first instruction 3286 * must be a PROBE_STATE (which is generated here). 3287 * If we have a LOG option, it was stored as the first command, 3288 * and now must be moved to the top of the action part. 3289 */ 3290 dst = (ipfw_insn *)rule->cmd; 3291 3292 /* 3293 * First thing to write into the command stream is the match probability. 3294 */ 3295 if (match_prob != 1) { /* 1 means always match */ 3296 dst->opcode = O_PROB; 3297 dst->len = 2; 3298 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3299 dst += dst->len; 3300 } 3301 3302 /* 3303 * generate O_PROBE_STATE if necessary 3304 */ 3305 if (have_state && have_state->opcode != O_CHECK_STATE) { 3306 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3307 dst = next_cmd(dst); 3308 } 3309 /* 3310 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT 3311 */ 3312 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3313 i = F_LEN(src); 3314 3315 switch (src->opcode) { 3316 case O_LOG: 3317 case O_KEEP_STATE: 3318 case O_LIMIT: 3319 break; 3320 default: 3321 bcopy(src, dst, i * sizeof(u_int32_t)); 3322 dst += i; 3323 } 3324 } 3325 3326 /* 3327 * put back the have_state command as last opcode 3328 */ 3329 if (have_state && have_state->opcode != O_CHECK_STATE) { 3330 i = F_LEN(have_state); 3331 bcopy(have_state, dst, i * sizeof(u_int32_t)); 3332 dst += i; 3333 } 3334 /* 3335 * start action section 3336 */ 3337 rule->act_ofs = dst - rule->cmd; 3338 3339 /* 3340 * put back O_LOG if necessary 3341 */ 3342 src = (ipfw_insn *)cmdbuf; 3343 if ( src->opcode == O_LOG ) { 3344 i = F_LEN(src); 3345 bcopy(src, dst, i * sizeof(u_int32_t)); 3346 dst += i; 3347 } 3348 /* 3349 * copy all other actions 3350 */ 3351 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3352 i = F_LEN(src); 3353 bcopy(src, dst, i * sizeof(u_int32_t)); 3354 dst += i; 3355 } 3356 3357 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); 3358 i = (void *)dst - (void *)rule; 3359 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) 3360 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3361 if (!do_quiet) 3362 show_ipfw(rule, 10, 10); 3363} 3364 3365static void 3366zero(int ac, char *av[]) 3367{ 3368 int rulenum; 3369 int failed = EX_OK; 3370 3371 av++; ac--; 3372 3373 if (!ac) { 3374 /* clear all entries */ 3375 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) 3376 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); 3377 if (!do_quiet) 3378 printf("Accounting cleared.\n"); 3379 3380 return; 3381 } 3382 3383 while (ac) { 3384 /* Rule number */ 3385 if (isdigit(**av)) { 3386 rulenum = atoi(*av); 3387 av++; 3388 ac--; 3389 if (setsockopt(s, IPPROTO_IP, 3390 IP_FW_ZERO, &rulenum, sizeof rulenum)) { 3391 warn("rule %u: setsockopt(IP_FW_ZERO)", 3392 rulenum); 3393 failed = EX_UNAVAILABLE; 3394 } else if (!do_quiet) 3395 printf("Entry %d cleared\n", rulenum); 3396 } else { 3397 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3398 } 3399 } 3400 if (failed != EX_OK) 3401 exit(failed); 3402} 3403 3404static void 3405resetlog(int ac, char *av[]) 3406{ 3407 int rulenum; 3408 int failed = EX_OK; 3409 3410 av++; ac--; 3411 3412 if (!ac) { 3413 /* clear all entries */ 3414 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) 3415 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); 3416 if (!do_quiet) 3417 printf("Logging counts reset.\n"); 3418 3419 return; 3420 } 3421 3422 while (ac) { 3423 /* Rule number */ 3424 if (isdigit(**av)) { 3425 rulenum = atoi(*av); 3426 av++; 3427 ac--; 3428 if (setsockopt(s, IPPROTO_IP, 3429 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { 3430 warn("rule %u: setsockopt(IP_FW_RESETLOG)", 3431 rulenum); 3432 failed = EX_UNAVAILABLE; 3433 } else if (!do_quiet) 3434 printf("Entry %d logging count reset\n", 3435 rulenum); 3436 } else { 3437 errx(EX_DATAERR, "invalid rule number ``%s''", *av); 3438 } 3439 } 3440 if (failed != EX_OK) 3441 exit(failed); 3442} 3443 3444static void 3445flush() 3446{ 3447 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3448 3449 if (!do_force && !do_quiet) { /* need to ask user */ 3450 int c; 3451 3452 printf("Are you sure? [yn] "); 3453 fflush(stdout); 3454 do { 3455 c = toupper(getc(stdin)); 3456 while (c != '\n' && getc(stdin) != '\n') 3457 if (feof(stdin)) 3458 return; /* and do not flush */ 3459 } while (c != 'Y' && c != 'N'); 3460 printf("\n"); 3461 if (c == 'N') /* user said no */ 3462 return; 3463 } 3464 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) 3465 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3466 do_pipe ? "DUMMYNET" : "FW"); 3467 if (!do_quiet) 3468 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); 3469} 3470 3471static int 3472ipfw_main(int ac, char **av) 3473{ 3474 int ch; 3475 3476 if (ac == 1) 3477 show_usage(); 3478 3479 /* Set the force flag for non-interactive processes */ 3480 do_force = !isatty(STDIN_FILENO); 3481 3482 optind = optreset = 1; 3483 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) 3484 switch (ch) { 3485 case 'h': /* help */ 3486 help(); 3487 break; /* NOTREACHED */ 3488 3489 case 's': /* sort */ 3490 do_sort = atoi(optarg); 3491 break; 3492 case 'a': 3493 do_acct = 1; 3494 break; 3495 case 'c': 3496 do_compact = 1; 3497 break; 3498 case 'd': 3499 do_dynamic = 1; 3500 break; 3501 case 'e': 3502 do_expired = 1; 3503 break; 3504 case 'f': 3505 do_force = 1; 3506 break; 3507 case 'N': 3508 do_resolv = 1; 3509 break; 3510 case 'q': 3511 do_quiet = 1; 3512 break; 3513 case 'S': 3514 show_sets = 1; 3515 break; 3516 case 't': 3517 do_time = 1; 3518 break; 3519 case 'v': /* verbose */ 3520 verbose++; 3521 break; 3522 default: 3523 show_usage(); 3524 } 3525 3526 ac -= optind; 3527 av += optind; 3528 NEED1("bad arguments, for usage summary ``ipfw''"); 3529 3530 /* 3531 * optional: pipe or queue 3532 */ 3533 if (!strncmp(*av, "pipe", strlen(*av))) { 3534 do_pipe = 1; 3535 ac--; 3536 av++; 3537 } else if (!strncmp(*av, "queue", strlen(*av))) { 3538 do_pipe = 2; 3539 ac--; 3540 av++; 3541 } 3542 NEED1("missing command"); 3543 3544 /* 3545 * for pipes and queues we normally say 'pipe NN config' 3546 * but the code is easier to parse as 'pipe config NN' 3547 * so we swap the two arguments. 3548 */ 3549 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') { 3550 char *p = av[0]; 3551 av[0] = av[1]; 3552 av[1] = p; 3553 } 3554 if (!strncmp(*av, "add", strlen(*av))) 3555 add(ac, av); 3556 else if (do_pipe && !strncmp(*av, "config", strlen(*av))) 3557 config_pipe(ac, av); 3558 else if (!strncmp(*av, "delete", strlen(*av))) 3559 delete(ac, av); 3560 else if (!strncmp(*av, "flush", strlen(*av))) 3561 flush(); 3562 else if (!strncmp(*av, "zero", strlen(*av))) 3563 zero(ac, av); 3564 else if (!strncmp(*av, "resetlog", strlen(*av))) 3565 resetlog(ac, av); 3566 else if (!strncmp(*av, "print", strlen(*av)) || 3567 !strncmp(*av, "list", strlen(*av))) 3568 list(ac, av); 3569 else if (!strncmp(*av, "set", strlen(*av))) 3570 sets_handler(ac, av); 3571 else if (!strncmp(*av, "enable", strlen(*av))) 3572 sysctl_handler(ac, av, 1); 3573 else if (!strncmp(*av, "disable", strlen(*av))) 3574 sysctl_handler(ac, av, 0); 3575 else if (!strncmp(*av, "show", strlen(*av))) { 3576 do_acct++; 3577 list(ac, av); 3578 } else 3579 errx(EX_USAGE, "bad command `%s'", *av); 3580 return 0; 3581} 3582 3583 3584static void 3585ipfw_readfile(int ac, char *av[]) 3586{ 3587#define MAX_ARGS 32 3588#define WHITESP " \t\f\v\n\r" 3589 char buf[BUFSIZ]; 3590 char *a, *p, *args[MAX_ARGS], *cmd = NULL; 3591 char linename[10]; 3592 int i=0, lineno=0, qflag=0, pflag=0, status; 3593 FILE *f = NULL; 3594 pid_t preproc = 0; 3595 int c; 3596 3597 while ((c = getopt(ac, av, "p:q")) != -1) { 3598 switch(c) { 3599 case 'p': 3600 pflag = 1; 3601 cmd = optarg; 3602 args[0] = cmd; 3603 i = 1; 3604 break; 3605 3606 case 'q': 3607 qflag = 1; 3608 break; 3609 3610 default: 3611 errx(EX_USAGE, "bad arguments, for usage" 3612 " summary ``ipfw''"); 3613 } 3614 3615 if (pflag) 3616 break; 3617 } 3618 3619 if (pflag) { 3620 /* Pass all but the last argument to the preprocessor. */ 3621 while (optind < ac - 1) { 3622 if (i >= MAX_ARGS) 3623 errx(EX_USAGE, "too many preprocessor options"); 3624 args[i++] = av[optind++]; 3625 } 3626 } 3627 3628 av += optind; 3629 ac -= optind; 3630 if (ac != 1) 3631 errx(EX_USAGE, "extraneous filename arguments"); 3632 3633 if ((f = fopen(av[0], "r")) == NULL) 3634 err(EX_UNAVAILABLE, "fopen: %s", av[0]); 3635 3636 if (pflag) { 3637 /* pipe through preprocessor (cpp or m4) */ 3638 int pipedes[2]; 3639 3640 args[i] = 0; 3641 3642 if (pipe(pipedes) == -1) 3643 err(EX_OSERR, "cannot create pipe"); 3644 3645 switch((preproc = fork())) { 3646 case -1: 3647 err(EX_OSERR, "cannot fork"); 3648 3649 case 0: 3650 /* child */ 3651 if (dup2(fileno(f), 0) == -1 3652 || dup2(pipedes[1], 1) == -1) 3653 err(EX_OSERR, "dup2()"); 3654 fclose(f); 3655 close(pipedes[1]); 3656 close(pipedes[0]); 3657 execvp(cmd, args); 3658 err(EX_OSERR, "execvp(%s) failed", cmd); 3659 3660 default: 3661 /* parent */ 3662 fclose(f); 3663 close(pipedes[1]); 3664 if ((f = fdopen(pipedes[0], "r")) == NULL) { 3665 int savederrno = errno; 3666 3667 (void)kill(preproc, SIGTERM); 3668 errno = savederrno; 3669 err(EX_OSERR, "fdopen()"); 3670 } 3671 } 3672 } 3673 3674 while (fgets(buf, BUFSIZ, f)) { 3675 lineno++; 3676 sprintf(linename, "Line %d", lineno); 3677 args[0] = linename; 3678 3679 if (*buf == '#') 3680 continue; 3681 if ((p = strchr(buf, '#')) != NULL) 3682 *p = '\0'; 3683 i = 1; 3684 if (qflag) 3685 args[i++] = "-q"; 3686 for (a = strtok(buf, WHITESP); 3687 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) 3688 args[i] = a; 3689 if (i == (qflag? 2: 1)) 3690 continue; 3691 if (i == MAX_ARGS) 3692 errx(EX_USAGE, "%s: too many arguments", 3693 linename); 3694 args[i] = NULL; 3695 3696 ipfw_main(i, args); 3697 } 3698 fclose(f); 3699 if (pflag) { 3700 if (waitpid(preproc, &status, 0) == -1) 3701 errx(EX_OSERR, "waitpid()"); 3702 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 3703 errx(EX_UNAVAILABLE, 3704 "preprocessor exited with status %d", 3705 WEXITSTATUS(status)); 3706 else if (WIFSIGNALED(status)) 3707 errx(EX_UNAVAILABLE, 3708 "preprocessor exited with signal %d", 3709 WTERMSIG(status)); 3710 } 3711} 3712 3713int 3714main(int ac, char *av[]) 3715{ 3716 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 3717 if (s < 0) 3718 err(EX_UNAVAILABLE, "socket"); 3719 3720 /* 3721 * If the last argument is an absolute pathname, interpret it 3722 * as a file to be preprocessed. 3723 */ 3724 3725 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 3726 ipfw_readfile(ac, av); 3727 else 3728 ipfw_main(ac, av); 3729 return EX_OK; 3730} 3731