1 /* 2 * Copyright (c) 2014 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Bill Yuan <bycn82@gmail.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <ctype.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <grp.h> 39 #include <limits.h> 40 #include <netdb.h> 41 #include <pwd.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <stdarg.h> 46 #include <string.h> 47 #include <sysexits.h> 48 #include <timeconv.h> 49 #include <unistd.h> 50 51 #include <netinet/in.h> 52 53 #include <arpa/inet.h> 54 #include <net/if.h> 55 #include <net/route.h> 56 #include <net/pfil.h> 57 58 #include "../../../sys/net/ipfw3/ip_fw3.h" 59 #include "../../../sbin/ipfw3/ipfw.h" 60 #include "ipfw3_basic.h" 61 62 63 #define IP_MASK_ALL 0xffffffff 64 /* 65 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 66 * This is only used in this code. 67 */ 68 #define IPPROTO_ETHERTYPE 0x1000 69 70 71 struct char_int_map limit_types[] = { 72 { "src-addr", 1 }, 73 { "src-port", 2 }, 74 { "dst-addr", 3 }, 75 { "dst-port", 4 }, 76 { NULL, 0 } 77 }; 78 79 static struct char_int_map ether_types[] = { 80 { "ip", 0x0800 }, 81 { "ipv4", 0x0800 }, 82 { "ipv6", 0x86dd }, 83 { "arp", 0x0806 }, 84 { "rarp", 0x8035 }, 85 { "vlan", 0x8100 }, 86 { "loop", 0x9000 }, 87 { "trail", 0x1000 }, 88 { "pppoe_disc", 0x8863 }, 89 { "pppoe_sess", 0x8864 }, 90 { "ipx_8022", 0x00E0 }, 91 { "ipx_8023", 0x0000 }, 92 { "ipx_ii", 0x8137 }, 93 { "ipx_snap", 0x8137 }, 94 { "ipx", 0x8137 }, 95 { "ns", 0x0600 }, 96 { NULL, 0 } 97 }; 98 99 /** 100 * match_token takes a table and a string, returns the value associated 101 * with the string (0 meaning an error in most cases) 102 */ 103 static int 104 match_token(struct char_int_map *table, char *string) 105 { 106 while (table->key) { 107 if (strcmp(table->key, string) == 0) 108 return table->val; 109 110 table++; 111 } 112 return 0; 113 }; 114 115 static char * 116 match_token2(struct char_int_map *table, int val) 117 { 118 while (table->val) { 119 if (table->val == val) 120 return table->key; 121 122 table++; 123 } 124 return NULL; 125 }; 126 127 static void 128 fill_iface(ipfw_insn_if *cmd, char *arg) 129 { 130 cmd->name[0] = '\0'; 131 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 132 133 /* Parse the interface or address */ 134 if (!strcmp(arg, "any")){ 135 cmd->o.len = 0; 136 } else if (!isdigit(*arg)) { 137 strlcpy(cmd->name, arg, sizeof(cmd->name)); 138 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 139 } else if (!inet_aton(arg, &cmd->p.ip)) 140 errx(EX_DATAERR, "bad ip address ``%s''", arg); 141 } 142 143 static int 144 lookup_host (char *host, struct in_addr *ipaddr) 145 { 146 struct hostent *he; 147 148 if (!inet_aton(host, ipaddr)) { 149 if ((he = gethostbyname(host)) == NULL) 150 return(-1); 151 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 152 } 153 return(0); 154 } 155 156 /* 157 * Like strtol, but also translates service names into port numbers 158 * for some protocols. 159 * In particular: 160 * proto == -1 disables the protocol check; 161 * proto == IPPROTO_ETHERTYPE looks up an internal table 162 * proto == <some value in /etc/protocols> matches the values there. 163 * Returns *end == s in case the parameter is not found. 164 */ 165 static int 166 strtoport(char *s, char **end, int base, int proto) 167 { 168 char *p, *buf; 169 char *s1; 170 int i; 171 172 *end = s; /* default - not found */ 173 if ( *s == '\0') 174 return 0; /* not found */ 175 176 if (isdigit(*s)) 177 return strtol(s, end, base); 178 179 /* 180 * find separator. '\\' escapes the next char. 181 */ 182 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) { 183 if (*s1 == '\\' && s1[1] != '\0') 184 s1++; 185 } 186 187 buf = malloc(s1 - s + 1); 188 if (buf == NULL) 189 return 0; 190 191 /* 192 * copy into a buffer skipping backslashes 193 */ 194 for (p = s, i = 0; p != s1 ; p++) 195 if ( *p != '\\') 196 buf[i++] = *p; 197 buf[i++] = '\0'; 198 199 if (proto == IPPROTO_ETHERTYPE) { 200 i = match_token(ether_types, buf); 201 free(buf); 202 if (i != -1) { /* found */ 203 *end = s1; 204 return i; 205 } 206 } else { 207 struct protoent *pe = NULL; 208 struct servent *se; 209 210 if (proto != 0) 211 pe = getprotobynumber(proto); 212 setservent(1); 213 se = getservbyname(buf, pe ? pe->p_name : NULL); 214 free(buf); 215 if (se != NULL) { 216 *end = s1; 217 return ntohs(se->s_port); 218 } 219 } 220 return 0; /* not found */ 221 } 222 223 static int 224 contigmask(u_char *p, int len) 225 { 226 int i, n; 227 for (i=0; i<len ; i++) { 228 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 229 break; 230 } 231 for (n=i+1; n < len; n++) { 232 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 233 return -1; /* mask not contiguous */ 234 } 235 return i; 236 } 237 238 static ipfw_insn *add_proto(ipfw_insn *cmd, char *av) 239 { 240 struct protoent *pe; 241 u_char proto = 0; 242 if (!strncmp(av, "all", strlen(av))) { 243 ; 244 } else if ((proto = atoi(av)) > 0) { 245 ; 246 } else if ((pe = getprotobyname(av)) != NULL) { 247 proto = pe->p_proto; 248 } else { 249 errx(EX_USAGE, "protocol `%s' not recognizable\n", av); 250 } 251 if (proto != IPPROTO_IP) { 252 cmd->opcode = O_BASIC_PROTO; 253 cmd->module = MODULE_BASIC_ID; 254 cmd->len = cmd->len|LEN_OF_IPFWINSN; 255 cmd->arg1 = proto; 256 } 257 return cmd; 258 } 259 260 void 261 parse_count(ipfw_insn **cmd, int *ac, char **av[]) 262 { 263 (*cmd)->opcode = O_BASIC_COUNT; 264 (*cmd)->module = MODULE_BASIC_ID; 265 (*cmd)->len = LEN_OF_IPFWINSN; 266 NEXT_ARG1; 267 } 268 269 void 270 parse_skipto(ipfw_insn **cmd, int *ac, char **av[]) 271 { 272 NEXT_ARG1; 273 (*cmd)->opcode = O_BASIC_SKIPTO; 274 (*cmd)->module = MODULE_BASIC_ID; 275 (*cmd)->len = LEN_OF_IPFWINSN; 276 (*cmd)->arg1 = strtoul(**av, NULL, 10); 277 NEXT_ARG1; 278 } 279 280 /* 281 * cmd->arg3 is count of the destination 282 * cmd->arg1 is the type, random 0, round-robin 1, sticky 2 283 */ 284 void 285 parse_forward(ipfw_insn **cmd, int *ac, char **av[]) 286 { 287 ipfw_insn_sa *p = (ipfw_insn_sa *)(*cmd); 288 struct sockaddr_in *sa; 289 char *tok, *end = '\0'; 290 char *str; 291 int count, port; 292 293 (*cmd)->opcode = O_BASIC_FORWARD; 294 NEXT_ARG1; 295 /* 296 * multiple forward destinations are seperated by colon 297 * ip address and port are seperated by comma 298 * e.g. 192.168.1.1:80,192.168.1.2:8080 299 * 192.168.1.1,192.168.1.2 or keep the port the same 300 */ 301 tok = strtok(**av, ","); 302 sa = &p->sa; 303 count = 0; 304 while (tok != NULL) { 305 sa->sin_len = sizeof(struct sockaddr_in); 306 sa->sin_family = AF_INET; 307 sa->sin_port = 0; 308 str = strchr(tok,':'); 309 if (str != NULL) { 310 *(str++) = '\0'; 311 port = strtoport(str, &end, 0, 0); 312 sa->sin_port = (u_short)port; 313 } 314 lookup_host(tok, &(sa->sin_addr)); 315 tok = strtok (NULL, ","); 316 sa++; 317 count++; 318 } 319 (*cmd)->arg3 = count; 320 if (count == 0) { 321 errx(EX_DATAERR, "forward `%s' not recognizable", **av); 322 } 323 NEXT_ARG1; 324 if (count > 1) { 325 if (strcmp(**av, "round-robin") == 0) { 326 NEXT_ARG1; 327 (*cmd)->arg1 = 1; 328 } else if (strcmp(**av, "sticky") == 0) { 329 NEXT_ARG1; 330 (*cmd)->arg1 = 2; 331 } else { 332 /* random */ 333 (*cmd)->arg1 = 0; 334 } 335 } 336 (*cmd)->len = LEN_OF_IPFWINSN + count * sizeof(struct sockaddr_in); 337 } 338 339 void 340 parse_in(ipfw_insn **cmd, int *ac, char **av[]) 341 { 342 (*cmd)->opcode = O_BASIC_IN; 343 (*cmd)->module = MODULE_BASIC_ID; 344 (*cmd)->len = LEN_OF_IPFWINSN; 345 (*cmd)->arg1 = 0; 346 NEXT_ARG1; 347 } 348 349 void 350 parse_out(ipfw_insn **cmd, int *ac, char **av[]) 351 { 352 (*cmd)->opcode = O_BASIC_OUT; 353 (*cmd)->module = MODULE_BASIC_ID; 354 (*cmd)->len = LEN_OF_IPFWINSN; 355 (*cmd)->arg1 = 0; 356 NEXT_ARG1; 357 } 358 359 360 void 361 parse_via(ipfw_insn **cmd, int *ac, char **av[]) 362 { 363 (*cmd)->module = MODULE_BASIC_ID; 364 (*cmd)->len = LEN_OF_IPFWINSN; 365 if (strcmp(*av[0], "via")==0) { 366 (*cmd)->opcode = O_BASIC_VIA; 367 } else if (strcmp(*av[0], "xmit")==0) { 368 (*cmd)->opcode = O_BASIC_XMIT; 369 } else if (strcmp(*av[0], "recv")==0) { 370 (*cmd)->opcode = O_BASIC_RECV; 371 } 372 NEXT_ARG1; 373 fill_iface((ipfw_insn_if *)(*cmd), *av[0]); 374 NEXT_ARG1; 375 } 376 377 /* 378 * Below formats are supported: 379 * from any return 0 len instruction 380 * from me O_BASIC_IP_SRC_ME 381 * from 1.2.3.4 O_BASIC_IP_SRC 382 * from 1.2.3.4/24 O_BASIC_IP_SRC_MASK 383 */ 384 void 385 parse_from(ipfw_insn **cmd, int *ac, char **av[]) 386 { 387 ipfw_insn_ip *p = (ipfw_insn_ip *)(*cmd); 388 int i; 389 390 (*cmd)->module = MODULE_BASIC_ID; 391 NEXT_ARG1; 392 if (strcmp(**av, "any") == 0) { 393 (*cmd)->len &= ~F_LEN_MASK; 394 } else if (strcmp(**av, "me") == 0) { 395 (*cmd)->len |= F_INSN_SIZE(ipfw_insn); 396 (*cmd)->opcode = O_BASIC_IP_SRC_ME; 397 } else { 398 char *c = NULL, md = 0; 399 c = strchr(**av, '/'); 400 if (c) { 401 md = *c; 402 *c++ = '\0'; 403 } 404 if (lookup_host(**av, &p->addr) != 0) 405 errx(EX_NOHOST, "hostname ``%s'' unknown", **av); 406 switch (md) { 407 case '/': 408 i = atoi(c); 409 if (i == 0) 410 p->mask.s_addr = htonl(0); 411 else if (i > 32) 412 errx(EX_DATAERR, "bad width ``%s''", c); 413 else 414 p->mask.s_addr = htonl(~0 << (32 - i)); 415 break; 416 default: 417 p->mask.s_addr = htonl(~0); 418 break; 419 } 420 p->addr.s_addr &= p->mask.s_addr; 421 if (p->mask.s_addr == 0) { 422 /* high kneel */ 423 } else if (p->mask.s_addr == IP_MASK_ALL) { 424 (*cmd)->len |= F_INSN_SIZE(ipfw_insn_u32); 425 (*cmd)->opcode = O_BASIC_IP_SRC; 426 } else { 427 (*cmd)->len |= F_INSN_SIZE(ipfw_insn_ip); 428 (*cmd)->opcode = O_BASIC_IP_SRC_MASK; 429 } 430 } 431 NEXT_ARG1; 432 } 433 434 void 435 parse_to(ipfw_insn **cmd, int *ac, char **av[]) 436 { 437 ipfw_insn_ip *p = (ipfw_insn_ip *)(*cmd); 438 int i; 439 440 (*cmd)->module = MODULE_BASIC_ID; 441 NEXT_ARG1; 442 if (strcmp(**av, "any") == 0) { 443 (*cmd)->len &= ~F_LEN_MASK; 444 } else if (strcmp(**av, "me") == 0) { 445 (*cmd)->len |= F_INSN_SIZE(ipfw_insn); 446 (*cmd)->opcode = O_BASIC_IP_DST_ME; 447 } else { 448 char *c = NULL, md = 0; 449 c = strchr(**av, '/'); 450 if (c) { 451 md = *c; 452 *c++ = '\0'; 453 } 454 if (lookup_host(**av, &p->addr) != 0) 455 errx(EX_NOHOST, "hostname ``%s'' unknown", **av); 456 switch (md) { 457 case '/': 458 i = atoi(c); 459 if (i == 0) 460 p->mask.s_addr = htonl(0); 461 else if (i > 32) 462 errx(EX_DATAERR, "bad width ``%s''", c); 463 else 464 p->mask.s_addr = htonl(~0 << (32 - i)); 465 break; 466 default: 467 p->mask.s_addr = htonl(~0); 468 break; 469 } 470 p->addr.s_addr &= p->mask.s_addr; 471 if (p->mask.s_addr == 0) { 472 /* high kneel */ 473 } else if (p->mask.s_addr == IP_MASK_ALL) { 474 (*cmd)->len |= F_INSN_SIZE(ipfw_insn_u32); 475 (*cmd)->opcode = O_BASIC_IP_DST; 476 } else { 477 (*cmd)->len |= F_INSN_SIZE(ipfw_insn_ip); 478 (*cmd)->opcode = O_BASIC_IP_DST_MASK; 479 } 480 } 481 NEXT_ARG1; 482 } 483 484 void 485 parse_proto(ipfw_insn **cmd, int *ac, char **av[]) 486 { 487 add_proto(*cmd, **av); 488 NEXT_ARG1; 489 } 490 491 void 492 parse_prob(ipfw_insn **cmd, int *ac, char **av[]) 493 { 494 NEXT_ARG1; 495 (*cmd)->opcode = O_BASIC_PROB; 496 (*cmd)->module = MODULE_BASIC_ID; 497 (*cmd)->len = LEN_OF_IPFWINSN; 498 (*cmd)->arg1 = strtoul(**av, NULL, 10); 499 NEXT_ARG1; 500 } 501 502 void 503 parse_keep_state(ipfw_insn **cmd, int *ac, char **av[]) 504 { 505 NEXT_ARG1; 506 (*cmd)->opcode = O_BASIC_KEEP_STATE; 507 (*cmd)->module = MODULE_BASIC_ID; 508 (*cmd)->len = LEN_OF_IPFWINSN; 509 if (strcmp(**av, "limit") == 0) { 510 NEXT_ARG1; 511 (*cmd)->arg3 = match_token(limit_types, **av); 512 if ((*cmd)->arg3 == 0) 513 errx(EX_DATAERR, "limit `%s' not recognizable", **av); 514 515 NEXT_ARG1; 516 (*cmd)->arg1 = strtoul(**av, NULL, 10); 517 if ((*cmd)->arg1 == 0) 518 errx(EX_DATAERR, "bad limit `%s'", **av); 519 520 NEXT_ARG1; 521 } 522 if (strcmp(**av, "live") == 0) { 523 NEXT_ARG1; 524 (*cmd)->arg2 = strtoul(**av, NULL, 10); 525 NEXT_ARG1; 526 } 527 } 528 529 void 530 parse_check_state(ipfw_insn **cmd, int *ac, char **av[]) 531 { 532 NEXT_ARG1; 533 (*cmd)->opcode = O_BASIC_CHECK_STATE; 534 (*cmd)->module = MODULE_BASIC_ID; 535 (*cmd)->len = LEN_OF_IPFWINSN; 536 } 537 538 void 539 parse_tagged(ipfw_insn **cmd, int *ac, char **av[]) 540 { 541 NEXT_ARG1; 542 (*cmd)->opcode = O_BASIC_TAGGED; 543 (*cmd)->module = MODULE_BASIC_ID; 544 (*cmd)->len = LEN_OF_IPFWINSN; 545 (*cmd)->arg1 = strtoul(**av, NULL, 10); 546 NEXT_ARG1; 547 } 548 549 void 550 parse_comment(ipfw_insn **cmd, int *ac, char **av[]) 551 { 552 int l = 0; 553 char *p = (char *)((*cmd) + 1); 554 555 NEXT_ARG1; 556 (*cmd)->opcode = O_BASIC_COMMENT; 557 (*cmd)->module = MODULE_BASIC_ID; 558 559 while (*ac > 0) { 560 l += strlen(**av) + 1; 561 if (l > 84) { 562 errx(EX_DATAERR, "comment too long (max 80 chars)"); 563 } 564 strcpy(p, **av); 565 p += strlen(**av); 566 *p++ = ' '; 567 NEXT_ARG1; 568 } 569 l = 1 + (l + 3) / 4; 570 (*cmd)->len = l; 571 *(--p) = '\0'; 572 } 573 574 void 575 parse_tag(ipfw_insn **cmd, int *ac, char **av[]) 576 { 577 NEXT_ARG1; 578 (*cmd)->opcode = O_BASIC_TAG; 579 (*cmd)->module = MODULE_BASIC_ID; 580 (*cmd)->len = LEN_OF_IPFWINSN; 581 (*cmd)->arg1 = strtoul(**av, NULL, 10); 582 NEXT_ARG1; 583 } 584 585 void 586 parse_untag(ipfw_insn **cmd, int *ac, char **av[]) 587 { 588 NEXT_ARG1; 589 (*cmd)->opcode = O_BASIC_UNTAG; 590 (*cmd)->module = MODULE_BASIC_ID; 591 (*cmd)->len = LEN_OF_IPFWINSN; 592 (*cmd)->arg1 = strtoul(**av, NULL, 10); 593 NEXT_ARG1; 594 } 595 596 void 597 show_count(ipfw_insn *cmd, int show_or) 598 { 599 printf(" count"); 600 } 601 602 void 603 show_skipto(ipfw_insn *cmd, int show_or) 604 { 605 printf(" skipto %u", cmd->arg1); 606 } 607 608 void 609 show_forward(ipfw_insn *cmd, int show_or) 610 { 611 struct sockaddr_in *sa; 612 int i; 613 614 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 615 sa = &s->sa; 616 printf(" forward"); 617 for (i = 0; i < cmd->arg3; i++){ 618 if (i > 0) 619 printf(","); 620 else 621 printf(" "); 622 623 printf("%s", inet_ntoa(sa->sin_addr)); 624 if (sa->sin_port != 0) 625 printf(":%d", sa->sin_port); 626 627 sa++; 628 } 629 if (cmd->arg1 == 1) 630 printf(" round-robin"); 631 else if (cmd->arg1 == 2) 632 printf(" sticky"); 633 634 } 635 636 void 637 show_in(ipfw_insn *cmd, int show_or) 638 { 639 printf(" in"); 640 } 641 642 void 643 show_out(ipfw_insn *cmd, int show_or) 644 { 645 printf(" out"); 646 } 647 648 void 649 show_via(ipfw_insn *cmd, int show_or) 650 { 651 char *s; 652 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 653 654 if ((int)cmd->opcode == O_BASIC_XMIT) 655 s = "xmit"; 656 else if ((int)cmd->opcode == O_BASIC_RECV) 657 s = "recv"; 658 else if ((int)cmd->opcode == O_BASIC_VIA) 659 s = "via"; 660 else 661 s = "?huh?"; 662 if (show_or) 663 s = "or"; 664 if (cmdif->name[0] == '\0') 665 printf(" %s %s", s, inet_ntoa(cmdif->p.ip)); 666 667 printf(" %s %s", s, cmdif->name); 668 } 669 670 void 671 show_from(ipfw_insn *cmd, int show_or) 672 { 673 char *word = "from"; 674 if (show_or) 675 word = "or"; 676 printf(" %s %s", word, inet_ntoa(((ipfw_insn_ip *)cmd)->addr)); 677 } 678 679 void 680 show_from_me(ipfw_insn *cmd, int show_or) 681 { 682 char *word = "from"; 683 if (show_or) 684 word = "or"; 685 printf(" %s me", word); 686 } 687 688 void 689 show_from_mask(ipfw_insn *cmd, int show_or) 690 { 691 int mask; 692 char *word = "from"; 693 if (show_or) 694 word = "or"; 695 ipfw_insn_ip *p = (ipfw_insn_ip *)cmd; 696 printf(" %s %s", word, inet_ntoa(p->addr)); 697 698 mask = contigmask((u_char *)&(p->mask.s_addr), 32); 699 if (mask < 32) 700 printf("/%d", mask); 701 } 702 703 void 704 show_to(ipfw_insn *cmd, int show_or) 705 { 706 char *word = "to"; 707 if (show_or) 708 word = "or"; 709 printf(" %s %s", word, inet_ntoa(((ipfw_insn_ip *)cmd)->addr)); 710 } 711 712 void 713 show_to_me(ipfw_insn *cmd, int show_or) 714 { 715 char *word = "to"; 716 if (show_or) 717 word = "or"; 718 printf(" %s me", word); 719 } 720 721 void 722 show_to_mask(ipfw_insn *cmd, int show_or) 723 { 724 int mask; 725 char *word = "to"; 726 if (show_or) 727 word = "or"; 728 ipfw_insn_ip *p = (ipfw_insn_ip *)cmd; 729 printf(" %s %s", word, inet_ntoa(p->addr)); 730 731 mask = contigmask((u_char *)&(p->mask.s_addr), 32); 732 if (mask < 32) 733 printf("/%d", mask); 734 } 735 736 void 737 show_proto(ipfw_insn *cmd, int show_or) 738 { 739 struct protoent *pe; 740 u_char proto = 0; 741 proto = cmd->arg1; 742 pe = getprotobynumber(cmd->arg1); 743 printf(" %s", pe->p_name); 744 } 745 746 void 747 show_prob(ipfw_insn *cmd, int show_or) 748 { 749 printf(" prob %d%%", cmd->arg1); 750 } 751 752 void 753 show_keep_state(ipfw_insn *cmd, int show_or) 754 { 755 printf(" keep-state"); 756 if (cmd->arg1 != 0) { 757 char *type=match_token2(limit_types, cmd->arg3); 758 printf(" limit %s %d", type, cmd->arg1); 759 } 760 if (cmd->arg2 != 0) { 761 printf(" live %d", cmd->arg2); 762 } 763 } 764 765 void 766 show_check_state(ipfw_insn *cmd, int show_or) 767 { 768 printf(" check-state"); 769 } 770 771 void 772 show_tagged(ipfw_insn *cmd, int show_or) 773 { 774 printf(" tagged %d", cmd->arg1); 775 } 776 777 void 778 show_comment(ipfw_insn *cmd, int show_or) 779 { 780 printf(" // %s", (char *)(cmd + 1)); 781 } 782 783 void 784 show_tag(ipfw_insn *cmd, int show_or) 785 { 786 printf(" tag %d", cmd->arg1); 787 } 788 789 void 790 show_untag(ipfw_insn *cmd, int show_or) 791 { 792 printf(" untag %d", cmd->arg1); 793 } 794 795 void 796 load_module(register_func function, register_keyword keyword) 797 { 798 keyword(MODULE_BASIC_ID, O_BASIC_COUNT, "count", 799 IPFW_KEYWORD_TYPE_ACTION); 800 function(MODULE_BASIC_ID, O_BASIC_COUNT, 801 (parser_func)parse_count, (shower_func)show_count); 802 803 keyword(MODULE_BASIC_ID, O_BASIC_SKIPTO, "skipto", 804 IPFW_KEYWORD_TYPE_ACTION); 805 function(MODULE_BASIC_ID, O_BASIC_SKIPTO, 806 (parser_func)parse_skipto, (shower_func)show_skipto); 807 808 keyword(MODULE_BASIC_ID, O_BASIC_FORWARD, "forward", 809 IPFW_KEYWORD_TYPE_ACTION); 810 function(MODULE_BASIC_ID, O_BASIC_FORWARD, 811 (parser_func)parse_forward, (shower_func)show_forward); 812 813 keyword(MODULE_BASIC_ID, O_BASIC_IN, "in", IPFW_KEYWORD_TYPE_FILTER); 814 function(MODULE_BASIC_ID, O_BASIC_IN, 815 (parser_func)parse_in, (shower_func)show_in); 816 817 keyword(MODULE_BASIC_ID, O_BASIC_OUT, "out", IPFW_KEYWORD_TYPE_FILTER); 818 function(MODULE_BASIC_ID, O_BASIC_OUT, 819 (parser_func)parse_out, (shower_func)show_out); 820 821 keyword(MODULE_BASIC_ID, O_BASIC_VIA, "via", IPFW_KEYWORD_TYPE_FILTER); 822 function(MODULE_BASIC_ID, O_BASIC_VIA, 823 (parser_func)parse_via, (shower_func)show_via); 824 825 keyword(MODULE_BASIC_ID, O_BASIC_XMIT, "xmit", 826 IPFW_KEYWORD_TYPE_FILTER); 827 function(MODULE_BASIC_ID, O_BASIC_XMIT, 828 (parser_func)parse_via, (shower_func)show_via); 829 830 keyword(MODULE_BASIC_ID, O_BASIC_RECV, "recv", 831 IPFW_KEYWORD_TYPE_FILTER); 832 function(MODULE_BASIC_ID, O_BASIC_RECV, 833 (parser_func)parse_via, (shower_func)show_via); 834 835 keyword(MODULE_BASIC_ID, O_BASIC_IP_SRC, "from", 836 IPFW_KEYWORD_TYPE_FILTER); 837 function(MODULE_BASIC_ID, O_BASIC_IP_SRC, 838 (parser_func)parse_from, (shower_func)show_from); 839 keyword(MODULE_BASIC_ID, O_BASIC_IP_SRC_ME, "[from me]", 840 IPFW_KEYWORD_TYPE_FILTER); 841 function(MODULE_BASIC_ID, O_BASIC_IP_SRC_ME, 842 (parser_func)parse_from, (shower_func)show_from_me); 843 keyword(MODULE_BASIC_ID, O_BASIC_IP_SRC_MASK, "[from mask]", 844 IPFW_KEYWORD_TYPE_FILTER); 845 function(MODULE_BASIC_ID, O_BASIC_IP_SRC_MASK, 846 (parser_func)parse_from, (shower_func)show_from_mask); 847 keyword(MODULE_BASIC_ID, O_BASIC_IP_DST, "to", 848 IPFW_KEYWORD_TYPE_FILTER); 849 function(MODULE_BASIC_ID, O_BASIC_IP_DST, 850 (parser_func)parse_to, (shower_func)show_to); 851 keyword(MODULE_BASIC_ID, O_BASIC_IP_DST_ME, "[to me]", 852 IPFW_KEYWORD_TYPE_FILTER); 853 function(MODULE_BASIC_ID, O_BASIC_IP_DST_ME, 854 (parser_func)parse_to, (shower_func)show_to_me); 855 keyword(MODULE_BASIC_ID, O_BASIC_IP_DST_MASK, "[to mask]", 856 IPFW_KEYWORD_TYPE_FILTER); 857 function(MODULE_BASIC_ID, O_BASIC_IP_DST_MASK, 858 (parser_func)parse_to, (shower_func)show_to_mask); 859 860 keyword(MODULE_BASIC_ID, O_BASIC_PROTO, "proto", 861 IPFW_KEYWORD_TYPE_FILTER); 862 function(MODULE_BASIC_ID, O_BASIC_PROTO, 863 (parser_func)parse_proto, (shower_func)show_proto); 864 865 keyword(MODULE_BASIC_ID, O_BASIC_PROB, "prob", 866 IPFW_KEYWORD_TYPE_FILTER); 867 function(MODULE_BASIC_ID, O_BASIC_PROB, 868 (parser_func)parse_prob, (shower_func)show_prob); 869 870 keyword(MODULE_BASIC_ID, O_BASIC_KEEP_STATE, "keep-state", 871 IPFW_KEYWORD_TYPE_FILTER); 872 function(MODULE_BASIC_ID, O_BASIC_KEEP_STATE, 873 (parser_func)parse_keep_state, 874 (shower_func)show_keep_state); 875 876 keyword(MODULE_BASIC_ID, O_BASIC_CHECK_STATE, "check-state", 877 IPFW_KEYWORD_TYPE_OTHERS); 878 function(MODULE_BASIC_ID, O_BASIC_CHECK_STATE, 879 (parser_func)parse_check_state, 880 (shower_func)show_check_state); 881 882 keyword(MODULE_BASIC_ID, O_BASIC_TAG, "tag", IPFW_KEYWORD_TYPE_OTHERS); 883 function(MODULE_BASIC_ID, O_BASIC_TAG, 884 (parser_func)parse_tag, (shower_func)show_tag); 885 886 keyword(MODULE_BASIC_ID, O_BASIC_UNTAG, "untag", 887 IPFW_KEYWORD_TYPE_OTHERS); 888 function(MODULE_BASIC_ID, O_BASIC_UNTAG, 889 (parser_func)parse_untag, (shower_func)show_untag); 890 891 keyword(MODULE_BASIC_ID, O_BASIC_TAGGED, "tagged", 892 IPFW_KEYWORD_TYPE_FILTER); 893 function(MODULE_BASIC_ID, O_BASIC_TAGGED, 894 (parser_func)parse_tagged, (shower_func)show_tagged); 895 896 keyword(MODULE_BASIC_ID, O_BASIC_COMMENT, "//", 897 IPFW_KEYWORD_TYPE_FILTER); 898 function(MODULE_BASIC_ID, O_BASIC_COMMENT, 899 (parser_func)parse_comment, (shower_func)show_comment); 900 } 901