| 1 | /* |
| 2 | * Copyright (c) 2002 Luigi Rizzo |
| 3 | * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp |
| 4 | * Copyright (c) 1994 Ugen J.S.Antsilevich |
| 5 | * |
| 6 | * Idea and grammar partially left from: |
| 7 | * Copyright (c) 1993 Daniel Boulet |
| 8 | * |
| 9 | * Redistribution and use in source forms, with and without modification, |
| 10 | * are permitted provided that this entire comment appears intact. |
| 11 | * |
| 12 | * Redistribution in binary form may occur without any restrictions. |
| 13 | * Obviously, it would be nice if you gave credit where credit is due |
| 14 | * but requiring it would be too onerous. |
| 15 | * |
| 16 | * This software is provided ``AS IS'' without any warranties of any kind. |
| 17 | * |
| 18 | * NEW command line interface for IP firewall facility |
| 19 | * |
| 20 | * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $ |
| 21 | */ |
| 22 | |
| 23 | #include <sys/param.h> |
| 24 | #include <sys/mbuf.h> |
| 25 | #include <sys/socket.h> |
| 26 | #include <sys/sockio.h> |
| 27 | #include <sys/sysctl.h> |
| 28 | #include <sys/time.h> |
| 29 | #include <sys/wait.h> |
| 30 | |
| 31 | #include <ctype.h> |
| 32 | #include <err.h> |
| 33 | #include <errno.h> |
| 34 | #include <grp.h> |
| 35 | #include <limits.h> |
| 36 | #include <netdb.h> |
| 37 | #include <pwd.h> |
| 38 | #include <signal.h> |
| 39 | #include <stdio.h> |
| 40 | #include <stdlib.h> |
| 41 | #include <stdarg.h> |
| 42 | #include <string.h> |
| 43 | #include <timeconv.h> |
| 44 | #include <unistd.h> |
| 45 | #include <sysexits.h> |
| 46 | |
| 47 | #include <net/if.h> |
| 48 | #include <netinet/in.h> |
| 49 | #include <netinet/in_systm.h> |
| 50 | #include <netinet/ip.h> |
| 51 | #include <netinet/ip_icmp.h> |
| 52 | #include <net/ipfw/ip_fw.h> |
| 53 | #include <net/route.h> /* def. of struct route */ |
| 54 | #include <net/ethernet.h> |
| 55 | #include <net/dummynet/ip_dummynet.h> |
| 56 | #include <netinet/tcp.h> |
| 57 | #include <arpa/inet.h> |
| 58 | |
| 59 | int s, /* main RAW socket */ |
| 60 | do_resolv, /* Would try to resolve all */ |
| 61 | do_acct, /* Show packet/byte count */ |
| 62 | do_time, /* Show time stamps */ |
| 63 | do_quiet, /* Be quiet in add and flush */ |
| 64 | do_force, /* Don't ask for confirmation */ |
| 65 | do_pipe, /* this cmd refers to a pipe */ |
| 66 | do_table, /* this cmd referes to a table */ |
| 67 | do_sort, /* field to sort results (0 = no) */ |
| 68 | do_dynamic, /* display dynamic rules */ |
| 69 | do_expired, /* display expired dynamic rules */ |
| 70 | do_compact, /* show rules in compact mode */ |
| 71 | show_sets, /* display rule sets */ |
| 72 | verbose; |
| 73 | |
| 74 | #define IP_MASK_ALL 0xffffffff |
| 75 | |
| 76 | /* |
| 77 | * structure to hold flag names and associated values to be |
| 78 | * set in the appropriate masks. |
| 79 | * A NULL string terminates the array. |
| 80 | * Often, an element with 0 value contains an error string. |
| 81 | * |
| 82 | */ |
| 83 | struct _s_x { |
| 84 | const char *s; |
| 85 | uint32_t x; |
| 86 | }; |
| 87 | |
| 88 | static struct _s_x f_tcpflags[] = { |
| 89 | { "syn", TH_SYN }, |
| 90 | { "fin", TH_FIN }, |
| 91 | { "ack", TH_ACK }, |
| 92 | { "psh", TH_PUSH }, |
| 93 | { "rst", TH_RST }, |
| 94 | { "urg", TH_URG }, |
| 95 | { "tcp flag", 0 }, |
| 96 | { NULL, 0 } |
| 97 | }; |
| 98 | |
| 99 | static struct _s_x f_tcpopts[] = { |
| 100 | { "mss", IP_FW_TCPOPT_MSS }, |
| 101 | { "maxseg", IP_FW_TCPOPT_MSS }, |
| 102 | { "window", IP_FW_TCPOPT_WINDOW }, |
| 103 | { "sack", IP_FW_TCPOPT_SACK }, |
| 104 | { "ts", IP_FW_TCPOPT_TS }, |
| 105 | { "timestamp", IP_FW_TCPOPT_TS }, |
| 106 | { "cc", IP_FW_TCPOPT_CC }, |
| 107 | { "tcp option", 0 }, |
| 108 | { NULL, 0 } |
| 109 | }; |
| 110 | |
| 111 | /* |
| 112 | * IP options span the range 0 to 255 so we need to remap them |
| 113 | * (though in fact only the low 5 bits are significant). |
| 114 | */ |
| 115 | static struct _s_x f_ipopts[] = { |
| 116 | { "ssrr", IP_FW_IPOPT_SSRR}, |
| 117 | { "lsrr", IP_FW_IPOPT_LSRR}, |
| 118 | { "rr", IP_FW_IPOPT_RR}, |
| 119 | { "ts", IP_FW_IPOPT_TS}, |
| 120 | { "ip option", 0 }, |
| 121 | { NULL, 0 } |
| 122 | }; |
| 123 | |
| 124 | static struct _s_x f_iptos[] = { |
| 125 | { "lowdelay", IPTOS_LOWDELAY}, |
| 126 | { "throughput", IPTOS_THROUGHPUT}, |
| 127 | { "reliability", IPTOS_RELIABILITY}, |
| 128 | { "mincost", IPTOS_MINCOST}, |
| 129 | { "congestion", IPTOS_CE}, |
| 130 | { "ecntransport", IPTOS_ECT}, |
| 131 | { "ip tos option", 0}, |
| 132 | { NULL, 0 } |
| 133 | }; |
| 134 | |
| 135 | static struct _s_x limit_masks[] = { |
| 136 | {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, |
| 137 | {"src-addr", DYN_SRC_ADDR}, |
| 138 | {"src-port", DYN_SRC_PORT}, |
| 139 | {"dst-addr", DYN_DST_ADDR}, |
| 140 | {"dst-port", DYN_DST_PORT}, |
| 141 | {NULL, 0} |
| 142 | }; |
| 143 | |
| 144 | /* |
| 145 | * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines |
| 146 | * This is only used in this code. |
| 147 | */ |
| 148 | #define IPPROTO_ETHERTYPE 0x1000 |
| 149 | static struct _s_x ether_types[] = { |
| 150 | /* |
| 151 | * Note, we cannot use "-:&/" in the names because they are field |
| 152 | * separators in the type specifications. Also, we use s = NULL as |
| 153 | * end-delimiter, because a type of 0 can be legal. |
| 154 | */ |
| 155 | { "ip", 0x0800 }, |
| 156 | { "ipv4", 0x0800 }, |
| 157 | { "ipv6", 0x86dd }, |
| 158 | { "arp", 0x0806 }, |
| 159 | { "rarp", 0x8035 }, |
| 160 | { "vlan", 0x8100 }, |
| 161 | { "loop", 0x9000 }, |
| 162 | { "trail", 0x1000 }, |
| 163 | { "pppoe_disc", 0x8863 }, |
| 164 | { "pppoe_sess", 0x8864 }, |
| 165 | { "ipx_8022", 0x00E0 }, |
| 166 | { "ipx_8023", 0x0000 }, |
| 167 | { "ipx_ii", 0x8137 }, |
| 168 | { "ipx_snap", 0x8137 }, |
| 169 | { "ipx", 0x8137 }, |
| 170 | { "ns", 0x0600 }, |
| 171 | { NULL, 0 } |
| 172 | }; |
| 173 | |
| 174 | static void show_usage(void); |
| 175 | |
| 176 | enum tokens { |
| 177 | TOK_NULL=0, |
| 178 | |
| 179 | TOK_OR, |
| 180 | TOK_NOT, |
| 181 | TOK_STARTBRACE, |
| 182 | TOK_ENDBRACE, |
| 183 | |
| 184 | TOK_ACCEPT, |
| 185 | TOK_COUNT, |
| 186 | TOK_DEFRAG, |
| 187 | TOK_PIPE, |
| 188 | TOK_QUEUE, |
| 189 | TOK_DIVERT, |
| 190 | TOK_TEE, |
| 191 | TOK_FORWARD, |
| 192 | TOK_SKIPTO, |
| 193 | TOK_DENY, |
| 194 | TOK_REJECT, |
| 195 | TOK_RESET, |
| 196 | TOK_UNREACH, |
| 197 | TOK_CHECKSTATE, |
| 198 | |
| 199 | TOK_UID, |
| 200 | TOK_GID, |
| 201 | TOK_IN, |
| 202 | TOK_LIMIT, |
| 203 | TOK_KEEPSTATE, |
| 204 | TOK_LAYER2, |
| 205 | TOK_OUT, |
| 206 | TOK_XMIT, |
| 207 | TOK_RECV, |
| 208 | TOK_VIA, |
| 209 | TOK_FRAG, |
| 210 | TOK_IPFRAG, |
| 211 | TOK_IPOPTS, |
| 212 | TOK_IPLEN, |
| 213 | TOK_IPID, |
| 214 | TOK_IPPRECEDENCE, |
| 215 | TOK_IPTOS, |
| 216 | TOK_IPTTL, |
| 217 | TOK_IPVER, |
| 218 | TOK_ESTAB, |
| 219 | TOK_SETUP, |
| 220 | TOK_TCPFLAGS, |
| 221 | TOK_TCPOPTS, |
| 222 | TOK_TCPSEQ, |
| 223 | TOK_TCPACK, |
| 224 | TOK_TCPWIN, |
| 225 | TOK_ICMPTYPES, |
| 226 | TOK_MAC, |
| 227 | TOK_MACTYPE, |
| 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 | |
| 247 | struct _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 | |
| 271 | struct _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 | { "defrag", TOK_DEFRAG }, |
| 291 | { NULL, TOK_NULL }, |
| 292 | { NULL, 0 } |
| 293 | }; |
| 294 | |
| 295 | struct _s_x rule_options[] = { |
| 296 | { "uid", TOK_UID }, |
| 297 | { "gid", TOK_GID }, |
| 298 | { "in", TOK_IN }, |
| 299 | { "limit", TOK_LIMIT }, |
| 300 | { "keep-state", TOK_KEEPSTATE }, |
| 301 | { "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 | { "ipfrag", TOK_IPFRAG }, |
| 309 | { "ipoptions", TOK_IPOPTS }, |
| 310 | { "ipopts", TOK_IPOPTS }, |
| 311 | { "iplen", TOK_IPLEN }, |
| 312 | { "ipid", TOK_IPID }, |
| 313 | { "ipprecedence", TOK_IPPRECEDENCE }, |
| 314 | { "iptos", TOK_IPTOS }, |
| 315 | { "ipttl", TOK_IPTTL }, |
| 316 | { "ipversion", TOK_IPVER }, |
| 317 | { "ipver", TOK_IPVER }, |
| 318 | { "estab", TOK_ESTAB }, |
| 319 | { "established", TOK_ESTAB }, |
| 320 | { "setup", TOK_SETUP }, |
| 321 | { "tcpflags", TOK_TCPFLAGS }, |
| 322 | { "tcpflgs", TOK_TCPFLAGS }, |
| 323 | { "tcpoptions", TOK_TCPOPTS }, |
| 324 | { "tcpopts", TOK_TCPOPTS }, |
| 325 | { "tcpseq", TOK_TCPSEQ }, |
| 326 | { "tcpack", TOK_TCPACK }, |
| 327 | { "tcpwin", TOK_TCPWIN }, |
| 328 | { "icmptype", TOK_ICMPTYPES }, |
| 329 | { "icmptypes", TOK_ICMPTYPES }, |
| 330 | { "dst-ip", TOK_DSTIP }, |
| 331 | { "src-ip", TOK_SRCIP }, |
| 332 | { "dst-port", TOK_DSTPORT }, |
| 333 | { "src-port", TOK_SRCPORT }, |
| 334 | { "proto", TOK_PROTO }, |
| 335 | { "MAC", TOK_MAC }, |
| 336 | { "mac", TOK_MAC }, |
| 337 | { "mac-type", TOK_MACTYPE }, |
| 338 | |
| 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 | |
| 351 | /** |
| 352 | * match_token takes a table and a string, returns the value associated |
| 353 | * with the string (0 meaning an error in most cases) |
| 354 | */ |
| 355 | static int |
| 356 | match_token(struct _s_x *table, char *string) |
| 357 | { |
| 358 | struct _s_x *pt; |
| 359 | int i = strlen(string); |
| 360 | |
| 361 | for (pt = table ; i && pt->s != NULL ; pt++) |
| 362 | if ((int)strlen(pt->s) == i && !bcmp(string, pt->s, i)) |
| 363 | return pt->x; |
| 364 | return -1; |
| 365 | }; |
| 366 | |
| 367 | static const char * |
| 368 | match_value(struct _s_x *p, u_int32_t value) |
| 369 | { |
| 370 | for (; p->s != NULL; p++) |
| 371 | if (p->x == value) |
| 372 | return p->s; |
| 373 | return NULL; |
| 374 | } |
| 375 | |
| 376 | /* |
| 377 | * prints one port, symbolic or numeric |
| 378 | */ |
| 379 | static void |
| 380 | print_port(int proto, u_int16_t port) |
| 381 | { |
| 382 | |
| 383 | if (proto == IPPROTO_ETHERTYPE) { |
| 384 | const char *str; |
| 385 | |
| 386 | if (do_resolv && (str = match_value(ether_types, port)) ) |
| 387 | printf("%s", str); |
| 388 | else |
| 389 | printf("0x%04x", port); |
| 390 | } else { |
| 391 | struct servent *se = NULL; |
| 392 | if (do_resolv) { |
| 393 | struct protoent *pe = getprotobynumber(proto); |
| 394 | |
| 395 | se = getservbyport(htons(port), pe ? pe->p_name : NULL); |
| 396 | } |
| 397 | if (se) |
| 398 | printf("%s", se->s_name); |
| 399 | else |
| 400 | printf("%d", port); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | * print the values in a list of ports |
| 406 | * XXX todo: add support for mask. |
| 407 | */ |
| 408 | static void |
| 409 | print_newports(ipfw_insn_u16 *cmd, int proto, int opcode) |
| 410 | { |
| 411 | u_int16_t *p = cmd->ports; |
| 412 | int i; |
| 413 | const char *sep= " "; |
| 414 | |
| 415 | if (cmd->o.len & F_NOT) |
| 416 | printf(" not"); |
| 417 | if (opcode != 0) |
| 418 | printf ("%s", opcode == O_MAC_TYPE ? " mac-type" : |
| 419 | (opcode == O_IP_DSTPORT ? " dst-port" : " src-port")); |
| 420 | for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { |
| 421 | printf("%s", sep); |
| 422 | print_port(proto, p[0]); |
| 423 | if (p[0] != p[1]) { |
| 424 | printf("-"); |
| 425 | print_port(proto, p[1]); |
| 426 | } |
| 427 | sep = ","; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Like strtol, but also translates service names into port numbers |
| 433 | * for some protocols. |
| 434 | * In particular: |
| 435 | * proto == -1 disables the protocol check; |
| 436 | * proto == IPPROTO_ETHERTYPE looks up an internal table |
| 437 | * proto == <some value in /etc/protocols> matches the values there. |
| 438 | * Returns *end == s in case the parameter is not found. |
| 439 | */ |
| 440 | static int |
| 441 | strtoport(char *str, char **end, int base, int proto) |
| 442 | { |
| 443 | char *p, *buf; |
| 444 | char *s1; |
| 445 | int i; |
| 446 | |
| 447 | *end = str; /* default - not found */ |
| 448 | if (*str == '\0') |
| 449 | return 0; /* not found */ |
| 450 | |
| 451 | if (isdigit(*str)) |
| 452 | return strtol(str, end, base); |
| 453 | |
| 454 | /* |
| 455 | * find separator. '\\' escapes the next char. |
| 456 | */ |
| 457 | for (s1 = str; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) |
| 458 | if (*s1 == '\\' && s1[1] != '\0') |
| 459 | s1++; |
| 460 | |
| 461 | buf = malloc(s1 - str + 1); |
| 462 | if (buf == NULL) |
| 463 | return 0; |
| 464 | |
| 465 | /* |
| 466 | * copy into a buffer skipping backslashes |
| 467 | */ |
| 468 | for (p = str, i = 0; p != s1 ; p++) |
| 469 | if ( *p != '\\') |
| 470 | buf[i++] = *p; |
| 471 | buf[i++] = '\0'; |
| 472 | |
| 473 | if (proto == IPPROTO_ETHERTYPE) { |
| 474 | i = match_token(ether_types, buf); |
| 475 | free(buf); |
| 476 | if (i != -1) { /* found */ |
| 477 | *end = s1; |
| 478 | return i; |
| 479 | } |
| 480 | } else { |
| 481 | struct protoent *pe = NULL; |
| 482 | struct servent *se; |
| 483 | |
| 484 | if (proto != 0) |
| 485 | pe = getprotobynumber(proto); |
| 486 | setservent(1); |
| 487 | se = getservbyname(buf, pe ? pe->p_name : NULL); |
| 488 | free(buf); |
| 489 | if (se != NULL) { |
| 490 | *end = s1; |
| 491 | return ntohs(se->s_port); |
| 492 | } |
| 493 | } |
| 494 | return 0; /* not found */ |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * fill the body of the command with the list of port ranges. |
| 499 | * At the moment it only understands numeric ranges. |
| 500 | */ |
| 501 | static int |
| 502 | fill_newports(ipfw_insn_u16 *cmd, char *av, int proto) |
| 503 | { |
| 504 | u_int16_t *p = cmd->ports; |
| 505 | int i = 0; |
| 506 | char *str = av; |
| 507 | |
| 508 | while (*str) { |
| 509 | u_int16_t a, b; |
| 510 | |
| 511 | a = strtoport(av, &str, 0, proto); |
| 512 | if (str == av) /* no parameter */ |
| 513 | break; |
| 514 | if (*str == '-') { /* a range */ |
| 515 | av = str+1; |
| 516 | b = strtoport(av, &str, 0, proto); |
| 517 | if (str == av) /* no parameter */ |
| 518 | break; |
| 519 | p[0] = a; |
| 520 | p[1] = b; |
| 521 | } else if (*str == ',' || *str == '\0' ) { |
| 522 | p[0] = p[1] = a; |
| 523 | } else { /* invalid separator */ |
| 524 | errx(EX_DATAERR, "invalid separator <%c> in <%s>\n", |
| 525 | *str, av); |
| 526 | } |
| 527 | i++; |
| 528 | p += 2; |
| 529 | av = str+1; |
| 530 | } |
| 531 | if (i > 0) { |
| 532 | if (i+1 > F_LEN_MASK) |
| 533 | errx(EX_DATAERR, "too many ports/ranges\n"); |
| 534 | cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */ |
| 535 | } |
| 536 | return i; |
| 537 | } |
| 538 | |
| 539 | static struct _s_x icmpcodes[] = { |
| 540 | { "net", ICMP_UNREACH_NET }, |
| 541 | { "host", ICMP_UNREACH_HOST }, |
| 542 | { "protocol", ICMP_UNREACH_PROTOCOL }, |
| 543 | { "port", ICMP_UNREACH_PORT }, |
| 544 | { "needfrag", ICMP_UNREACH_NEEDFRAG }, |
| 545 | { "srcfail", ICMP_UNREACH_SRCFAIL }, |
| 546 | { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, |
| 547 | { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, |
| 548 | { "isolated", ICMP_UNREACH_ISOLATED }, |
| 549 | { "net-prohib", ICMP_UNREACH_NET_PROHIB }, |
| 550 | { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, |
| 551 | { "tosnet", ICMP_UNREACH_TOSNET }, |
| 552 | { "toshost", ICMP_UNREACH_TOSHOST }, |
| 553 | { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, |
| 554 | { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, |
| 555 | { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, |
| 556 | { NULL, 0 } |
| 557 | }; |
| 558 | |
| 559 | static void |
| 560 | fill_reject_code(u_short *codep, char *str) |
| 561 | { |
| 562 | int val; |
| 563 | char *s1; |
| 564 | |
| 565 | val = strtoul(str, &s1, 0); |
| 566 | if (s1 == str || *s1 != '\0' || val >= 0x100) |
| 567 | val = match_token(icmpcodes, str); |
| 568 | if (val < 0) |
| 569 | errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); |
| 570 | *codep = val; |
| 571 | return; |
| 572 | } |
| 573 | |
| 574 | static void |
| 575 | print_reject_code(u_int16_t code) |
| 576 | { |
| 577 | const char *str = match_value(icmpcodes, code); |
| 578 | |
| 579 | if (str != NULL) |
| 580 | printf("unreach %s", str); |
| 581 | else |
| 582 | printf("unreach %u", code); |
| 583 | } |
| 584 | |
| 585 | /* |
| 586 | * Returns the number of bits set (from left) in a contiguous bitmask, |
| 587 | * or -1 if the mask is not contiguous. |
| 588 | * XXX this needs a proper fix. |
| 589 | * This effectively works on masks in big-endian (network) format. |
| 590 | * when compiled on little endian architectures. |
| 591 | * |
| 592 | * First bit is bit 7 of the first byte -- note, for MAC addresses, |
| 593 | * the first bit on the wire is bit 0 of the first byte. |
| 594 | * len is the max length in bits. |
| 595 | */ |
| 596 | static int |
| 597 | contigmask(u_char *p, int len) |
| 598 | { |
| 599 | int i, n; |
| 600 | for (i=0; i<len ; i++) |
| 601 | if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ |
| 602 | break; |
| 603 | for (n=i+1; n < len; n++) |
| 604 | if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) |
| 605 | return -1; /* mask not contiguous */ |
| 606 | return i; |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * print flags set/clear in the two bitmasks passed as parameters. |
| 611 | * There is a specialized check for f_tcpflags. |
| 612 | */ |
| 613 | static void |
| 614 | print_flags(const char *name, ipfw_insn *cmd, struct _s_x *list) |
| 615 | { |
| 616 | const char *comma=""; |
| 617 | int i; |
| 618 | u_char set = cmd->arg1 & 0xff; |
| 619 | u_char clear = (cmd->arg1 >> 8) & 0xff; |
| 620 | |
| 621 | if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { |
| 622 | printf(" setup"); |
| 623 | return; |
| 624 | } |
| 625 | |
| 626 | printf(" %s ", name); |
| 627 | for (i=0; list[i].x != 0; i++) { |
| 628 | if (set & list[i].x) { |
| 629 | set &= ~list[i].x; |
| 630 | printf("%s%s", comma, list[i].s); |
| 631 | comma = ","; |
| 632 | } |
| 633 | if (clear & list[i].x) { |
| 634 | clear &= ~list[i].x; |
| 635 | printf("%s!%s", comma, list[i].s); |
| 636 | comma = ","; |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * Print the ip address contained in a command. |
| 643 | */ |
| 644 | static void |
| 645 | print_ip(ipfw_insn_ip *cmd, const char *str) |
| 646 | { |
| 647 | struct hostent *he = NULL; |
| 648 | int mb; |
| 649 | |
| 650 | printf("%s%s ", cmd->o.len & F_NOT ? " not": "", str); |
| 651 | |
| 652 | if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { |
| 653 | printf("me"); |
| 654 | return; |
| 655 | } |
| 656 | if (cmd->o.opcode == O_IP_SRC_TABLE || |
| 657 | cmd->o.opcode == O_IP_DST_TABLE) { |
| 658 | printf("<%u>", cmd->o.arg1); |
| 659 | return; |
| 660 | } |
| 661 | if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { |
| 662 | u_int32_t x, *d; |
| 663 | int i; |
| 664 | char comma = '{'; |
| 665 | |
| 666 | x = cmd->o.arg1 - 1; |
| 667 | x = htonl( ~x ); |
| 668 | cmd->addr.s_addr = htonl(cmd->addr.s_addr); |
| 669 | printf("%s/%d", inet_ntoa(cmd->addr), |
| 670 | contigmask((u_char *)&x, 32)); |
| 671 | x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); |
| 672 | x &= 0xff; /* base */ |
| 673 | d = (u_int32_t *)&(cmd->mask); |
| 674 | for (i=0; i < cmd->o.arg1; i++) |
| 675 | if (d[ i/32] & (1<<(i & 31))) { |
| 676 | printf("%c%d", comma, i+x); |
| 677 | comma = ','; |
| 678 | } |
| 679 | printf("}"); |
| 680 | return; |
| 681 | } |
| 682 | if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) |
| 683 | mb = 32; |
| 684 | else |
| 685 | mb = contigmask((u_char *)&(cmd->mask.s_addr), 32); |
| 686 | if (mb == 32 && do_resolv) |
| 687 | he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long), |
| 688 | AF_INET); |
| 689 | if (he != NULL) /* resolved to name */ |
| 690 | printf("%s", he->h_name); |
| 691 | else if (mb == 0) /* any */ |
| 692 | printf("any"); |
| 693 | else { /* numeric IP followed by some kind of mask */ |
| 694 | printf("%s", inet_ntoa(cmd->addr)); |
| 695 | if (mb < 0) |
| 696 | printf(":%s", inet_ntoa(cmd->mask)); |
| 697 | else if (mb < 32) |
| 698 | printf("/%d", mb); |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * prints a MAC address/mask pair |
| 704 | */ |
| 705 | static void |
| 706 | print_mac(u_char *addr, u_char *mask) |
| 707 | { |
| 708 | int l = contigmask(mask, 48); |
| 709 | |
| 710 | if (l == 0) |
| 711 | printf(" any"); |
| 712 | else { |
| 713 | printf(" %02x:%02x:%02x:%02x:%02x:%02x", |
| 714 | addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); |
| 715 | if (l == -1) |
| 716 | printf("&%02x:%02x:%02x:%02x:%02x:%02x", |
| 717 | mask[0], mask[1], mask[2], |
| 718 | mask[3], mask[4], mask[5]); |
| 719 | else if (l < 48) |
| 720 | printf("/%d", l); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | static void |
| 725 | fill_icmptypes(ipfw_insn_u32 *cmd, char *av) |
| 726 | { |
| 727 | u_int8_t type; |
| 728 | |
| 729 | cmd->d[0] = 0; |
| 730 | while (*av) { |
| 731 | if (*av == ',') |
| 732 | av++; |
| 733 | |
| 734 | type = strtoul(av, &av, 0); |
| 735 | |
| 736 | if (*av != ',' && *av != '\0') |
| 737 | errx(EX_DATAERR, "invalid ICMP type"); |
| 738 | |
| 739 | if (type > 31) |
| 740 | errx(EX_DATAERR, "ICMP type out of range"); |
| 741 | |
| 742 | cmd->d[0] |= 1 << type; |
| 743 | } |
| 744 | cmd->o.opcode = O_ICMPTYPE; |
| 745 | cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); |
| 746 | } |
| 747 | |
| 748 | static void |
| 749 | print_icmptypes(ipfw_insn_u32 *cmd) |
| 750 | { |
| 751 | int i; |
| 752 | char sep= ' '; |
| 753 | |
| 754 | printf(" icmptypes"); |
| 755 | for (i = 0; i < 32; i++) { |
| 756 | if ( (cmd->d[0] & (1 << (i))) == 0) |
| 757 | continue; |
| 758 | printf("%c%d", sep, i); |
| 759 | sep = ','; |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * show_ipfw() prints the body of an ipfw rule. |
| 765 | * Because the standard rule has at least proto src_ip dst_ip, we use |
| 766 | * a helper function to produce these entries if not provided explicitly. |
| 767 | * The first argument is the list of fields we have, the second is |
| 768 | * the list of fields we want to be printed. |
| 769 | * |
| 770 | * Special cases if we have provided a MAC header: |
| 771 | * + if the rule does not contain IP addresses/ports, do not print them; |
| 772 | * + if the rule does not contain an IP proto, print "all" instead of "ip"; |
| 773 | * |
| 774 | * Once we have 'have_options', IP header fields are printed as options. |
| 775 | */ |
| 776 | #define HAVE_PROTO 0x0001 |
| 777 | #define HAVE_SRCIP 0x0002 |
| 778 | #define HAVE_DSTIP 0x0004 |
| 779 | #define HAVE_MAC 0x0008 |
| 780 | #define HAVE_MACTYPE 0x0010 |
| 781 | #define HAVE_OPTIONS 0x8000 |
| 782 | |
| 783 | #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP) |
| 784 | static void |
| 785 | show_prerequisites(int *flags, int want, int cmd) |
| 786 | { |
| 787 | if ( (*flags & HAVE_IP) == HAVE_IP) |
| 788 | *flags |= HAVE_OPTIONS; |
| 789 | |
| 790 | if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC && |
| 791 | cmd != O_MAC_TYPE) { |
| 792 | /* |
| 793 | * mac-type was optimized out by the compiler, |
| 794 | * restore it |
| 795 | */ |
| 796 | printf(" any"); |
| 797 | *flags |= HAVE_MACTYPE | HAVE_OPTIONS; |
| 798 | return; |
| 799 | } |
| 800 | if ( !(*flags & HAVE_OPTIONS)) { |
| 801 | if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) |
| 802 | printf(" ip"); |
| 803 | if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) |
| 804 | printf(" from any"); |
| 805 | if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) |
| 806 | printf(" to any"); |
| 807 | } |
| 808 | *flags |= want; |
| 809 | } |
| 810 | |
| 811 | static void |
| 812 | show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth) |
| 813 | { |
| 814 | static int twidth = 0; |
| 815 | int l; |
| 816 | ipfw_insn *cmd; |
| 817 | int proto = 0; /* default */ |
| 818 | int flags = 0; /* prerequisites */ |
| 819 | ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ |
| 820 | int or_block = 0; /* we are in an or block */ |
| 821 | |
| 822 | u_int32_t set_disable = rule->set_disable; |
| 823 | |
| 824 | if (set_disable & (1 << rule->set)) { /* disabled */ |
| 825 | if (!show_sets) |
| 826 | return; |
| 827 | else |
| 828 | printf("# DISABLED "); |
| 829 | } |
| 830 | printf("%05u ", rule->rulenum); |
| 831 | |
| 832 | if (do_acct) |
| 833 | printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth, |
| 834 | (uintmax_t)rule->bcnt); |
| 835 | |
| 836 | if (do_time) { |
| 837 | char timestr[30]; |
| 838 | |
| 839 | if (twidth == 0) { |
| 840 | time_t t0 = 0; |
| 841 | |
| 842 | strcpy(timestr, ctime((time_t *)&t0)); |
| 843 | *strchr(timestr, '\n') = '\0'; |
| 844 | twidth = strlen(timestr); |
| 845 | } |
| 846 | if (rule->timestamp) { |
| 847 | time_t t = _long_to_time(rule->timestamp); |
| 848 | |
| 849 | strcpy(timestr, ctime(&t)); |
| 850 | *strchr(timestr, '\n') = '\0'; |
| 851 | printf("%s ", timestr); |
| 852 | } else { |
| 853 | printf("%*s ", twidth, " "); |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | if (show_sets) |
| 858 | printf("set %d ", rule->set); |
| 859 | |
| 860 | /* |
| 861 | * print the optional "match probability" |
| 862 | */ |
| 863 | if (rule->cmd_len > 0) { |
| 864 | cmd = rule->cmd ; |
| 865 | if (cmd->opcode == O_PROB) { |
| 866 | ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; |
| 867 | double d = 1.0 * p->d[0]; |
| 868 | |
| 869 | d = (d / 0x7fffffff); |
| 870 | printf("prob %f ", d); |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | /* |
| 875 | * first print actions |
| 876 | */ |
| 877 | for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); |
| 878 | l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { |
| 879 | switch(cmd->opcode) { |
| 880 | case O_CHECK_STATE: |
| 881 | printf("check-state"); |
| 882 | flags = HAVE_IP; /* avoid printing anything else */ |
| 883 | break; |
| 884 | |
| 885 | case O_ACCEPT: |
| 886 | printf("allow"); |
| 887 | break; |
| 888 | |
| 889 | case O_COUNT: |
| 890 | printf("count"); |
| 891 | break; |
| 892 | |
| 893 | case O_DEFRAG: |
| 894 | printf("defrag"); |
| 895 | break; |
| 896 | |
| 897 | case O_DENY: |
| 898 | printf("deny"); |
| 899 | break; |
| 900 | |
| 901 | case O_REJECT: |
| 902 | if (cmd->arg1 == ICMP_REJECT_RST) |
| 903 | printf("reset"); |
| 904 | else if (cmd->arg1 == ICMP_UNREACH_HOST) |
| 905 | printf("reject"); |
| 906 | else |
| 907 | print_reject_code(cmd->arg1); |
| 908 | break; |
| 909 | |
| 910 | case O_SKIPTO: |
| 911 | printf("skipto %u", cmd->arg1); |
| 912 | break; |
| 913 | |
| 914 | case O_PIPE: |
| 915 | printf("pipe %u", cmd->arg1); |
| 916 | break; |
| 917 | |
| 918 | case O_QUEUE: |
| 919 | printf("queue %u", cmd->arg1); |
| 920 | break; |
| 921 | |
| 922 | case O_DIVERT: |
| 923 | printf("divert %u", cmd->arg1); |
| 924 | break; |
| 925 | |
| 926 | case O_TEE: |
| 927 | printf("tee %u", cmd->arg1); |
| 928 | break; |
| 929 | |
| 930 | case O_FORWARD_IP: |
| 931 | { |
| 932 | ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd; |
| 933 | |
| 934 | printf("fwd %s", inet_ntoa(sa->sa.sin_addr)); |
| 935 | if (sa->sa.sin_port) |
| 936 | printf(",%d", sa->sa.sin_port); |
| 937 | } |
| 938 | break; |
| 939 | |
| 940 | case O_LOG: /* O_LOG is printed last */ |
| 941 | logptr = (ipfw_insn_log *)cmd; |
| 942 | break; |
| 943 | |
| 944 | default: |
| 945 | printf("** unrecognized action %d len %d", |
| 946 | cmd->opcode, cmd->len); |
| 947 | } |
| 948 | } |
| 949 | if (logptr) { |
| 950 | if (logptr->max_log > 0) |
| 951 | printf(" log logamount %d", logptr->max_log); |
| 952 | else |
| 953 | printf(" log"); |
| 954 | } |
| 955 | |
| 956 | /* |
| 957 | * then print the body. |
| 958 | */ |
| 959 | if (rule->usr_flags & IPFW_USR_F_NORULE) { |
| 960 | /* empty rules before options */ |
| 961 | if (!do_compact) |
| 962 | printf(" ip from any to any"); |
| 963 | flags |= HAVE_IP | HAVE_OPTIONS; |
| 964 | } |
| 965 | |
| 966 | for (l = rule->act_ofs, cmd = rule->cmd ; |
| 967 | l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { |
| 968 | /* useful alias */ |
| 969 | ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; |
| 970 | |
| 971 | show_prerequisites(&flags, 0, cmd->opcode); |
| 972 | |
| 973 | switch(cmd->opcode) { |
| 974 | case O_PROB: |
| 975 | break; /* done already */ |
| 976 | |
| 977 | case O_PROBE_STATE: |
| 978 | break; /* no need to print anything here */ |
| 979 | |
| 980 | case O_MACADDR2: { |
| 981 | ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; |
| 982 | |
| 983 | if ((cmd->len & F_OR) && !or_block) |
| 984 | printf(" {"); |
| 985 | if (cmd->len & F_NOT) |
| 986 | printf(" not"); |
| 987 | printf(" MAC"); |
| 988 | flags |= HAVE_MAC; |
| 989 | print_mac( m->addr, m->mask); |
| 990 | print_mac( m->addr + 6, m->mask + 6); |
| 991 | } |
| 992 | break; |
| 993 | |
| 994 | case O_MAC_TYPE: |
| 995 | if ((cmd->len & F_OR) && !or_block) |
| 996 | printf(" {"); |
| 997 | print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE, |
| 998 | (flags & HAVE_OPTIONS) ? cmd->opcode : 0); |
| 999 | flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS; |
| 1000 | break; |
| 1001 | |
| 1002 | case O_IP_SRC: |
| 1003 | case O_IP_SRC_MASK: |
| 1004 | case O_IP_SRC_ME: |
| 1005 | case O_IP_SRC_SET: |
| 1006 | case O_IP_SRC_TABLE: |
| 1007 | show_prerequisites(&flags, HAVE_PROTO, 0); |
| 1008 | if (!(flags & HAVE_SRCIP)) |
| 1009 | printf(" from"); |
| 1010 | if ((cmd->len & F_OR) && !or_block) |
| 1011 | printf(" {"); |
| 1012 | print_ip((ipfw_insn_ip *)cmd, |
| 1013 | (flags & HAVE_OPTIONS) ? " src-ip" : ""); |
| 1014 | flags |= HAVE_SRCIP; |
| 1015 | break; |
| 1016 | |
| 1017 | case O_IP_DST: |
| 1018 | case O_IP_DST_MASK: |
| 1019 | case O_IP_DST_ME: |
| 1020 | case O_IP_DST_SET: |
| 1021 | case O_IP_DST_TABLE: |
| 1022 | show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); |
| 1023 | if (!(flags & HAVE_DSTIP)) |
| 1024 | printf(" to"); |
| 1025 | if ((cmd->len & F_OR) && !or_block) |
| 1026 | printf(" {"); |
| 1027 | print_ip((ipfw_insn_ip *)cmd, |
| 1028 | (flags & HAVE_OPTIONS) ? " dst-ip" : ""); |
| 1029 | flags |= HAVE_DSTIP; |
| 1030 | break; |
| 1031 | |
| 1032 | case O_IP_DSTPORT: |
| 1033 | show_prerequisites(&flags, HAVE_IP, 0); |
| 1034 | case O_IP_SRCPORT: |
| 1035 | show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); |
| 1036 | if ((cmd->len & F_OR) && !or_block) |
| 1037 | printf(" {"); |
| 1038 | print_newports((ipfw_insn_u16 *)cmd, proto, |
| 1039 | (flags & HAVE_OPTIONS) ? cmd->opcode : 0); |
| 1040 | break; |
| 1041 | |
| 1042 | case O_PROTO: { |
| 1043 | struct protoent *pe; |
| 1044 | |
| 1045 | if ((cmd->len & F_OR) && !or_block) |
| 1046 | printf(" {"); |
| 1047 | if (cmd->len & F_NOT) |
| 1048 | printf(" not"); |
| 1049 | proto = cmd->arg1; |
| 1050 | pe = getprotobynumber(cmd->arg1); |
| 1051 | if (flags & HAVE_OPTIONS) |
| 1052 | printf(" proto"); |
| 1053 | if (pe) |
| 1054 | printf(" %s", pe->p_name); |
| 1055 | else |
| 1056 | printf(" %u", cmd->arg1); |
| 1057 | } |
| 1058 | flags |= HAVE_PROTO; |
| 1059 | break; |
| 1060 | |
| 1061 | default: /*options ... */ |
| 1062 | show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0); |
| 1063 | if ((cmd->len & F_OR) && !or_block) |
| 1064 | printf(" {"); |
| 1065 | if (cmd->len & F_NOT && cmd->opcode != O_IN) |
| 1066 | printf(" not"); |
| 1067 | switch(cmd->opcode) { |
| 1068 | case O_FRAG: |
| 1069 | printf(" frag"); |
| 1070 | break; |
| 1071 | |
| 1072 | case O_IPFRAG: |
| 1073 | printf(" ipfrag"); |
| 1074 | break; |
| 1075 | |
| 1076 | case O_IN: |
| 1077 | printf(cmd->len & F_NOT ? " out" : " in"); |
| 1078 | break; |
| 1079 | |
| 1080 | case O_LAYER2: |
| 1081 | printf(" layer2"); |
| 1082 | break; |
| 1083 | case O_XMIT: |
| 1084 | case O_RECV: |
| 1085 | case O_VIA: { |
| 1086 | const char *dir; |
| 1087 | ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; |
| 1088 | |
| 1089 | if (cmd->opcode == O_XMIT) |
| 1090 | dir = "xmit"; |
| 1091 | else if (cmd->opcode == O_RECV) |
| 1092 | dir = "recv"; |
| 1093 | else if (cmd->opcode == O_VIA) |
| 1094 | dir = "via"; |
| 1095 | else |
| 1096 | dir = "?huh?"; |
| 1097 | if (cmdif->name[0] == '\0') |
| 1098 | printf(" %s %s", dir, |
| 1099 | inet_ntoa(cmdif->p.ip)); |
| 1100 | printf(" %s %s", dir, cmdif->name); |
| 1101 | } |
| 1102 | break; |
| 1103 | |
| 1104 | case O_IPID: |
| 1105 | printf(" ipid %u", cmd->arg1 ); |
| 1106 | break; |
| 1107 | |
| 1108 | case O_IPTTL: |
| 1109 | printf(" ipttl %u", cmd->arg1 ); |
| 1110 | break; |
| 1111 | |
| 1112 | case O_IPVER: |
| 1113 | printf(" ipver %u", cmd->arg1 ); |
| 1114 | break; |
| 1115 | |
| 1116 | case O_IPPRECEDENCE: |
| 1117 | printf(" ipprecedence %u", (cmd->arg1) >> 5 ); |
| 1118 | break; |
| 1119 | |
| 1120 | case O_IPLEN: |
| 1121 | printf(" iplen %u", cmd->arg1 ); |
| 1122 | break; |
| 1123 | |
| 1124 | case O_IPOPT: |
| 1125 | print_flags("ipoptions", cmd, f_ipopts); |
| 1126 | break; |
| 1127 | |
| 1128 | case O_IPTOS: |
| 1129 | print_flags("iptos", cmd, f_iptos); |
| 1130 | break; |
| 1131 | |
| 1132 | case O_ICMPTYPE: |
| 1133 | print_icmptypes((ipfw_insn_u32 *)cmd); |
| 1134 | break; |
| 1135 | |
| 1136 | case O_ESTAB: |
| 1137 | printf(" established"); |
| 1138 | break; |
| 1139 | |
| 1140 | case O_TCPFLAGS: |
| 1141 | print_flags("tcpflags", cmd, f_tcpflags); |
| 1142 | break; |
| 1143 | |
| 1144 | case O_TCPOPTS: |
| 1145 | print_flags("tcpoptions", cmd, f_tcpopts); |
| 1146 | break; |
| 1147 | |
| 1148 | case O_TCPWIN: |
| 1149 | printf(" tcpwin %d", ntohs(cmd->arg1)); |
| 1150 | break; |
| 1151 | |
| 1152 | case O_TCPACK: |
| 1153 | printf(" tcpack %u", ntohl(cmd32->d[0])); |
| 1154 | break; |
| 1155 | |
| 1156 | case O_TCPSEQ: |
| 1157 | printf(" tcpseq %u", ntohl(cmd32->d[0])); |
| 1158 | break; |
| 1159 | |
| 1160 | case O_UID: |
| 1161 | { |
| 1162 | struct passwd *pwd = getpwuid(cmd32->d[0]); |
| 1163 | |
| 1164 | if (pwd) |
| 1165 | printf(" uid %s", pwd->pw_name); |
| 1166 | else |
| 1167 | printf(" uid %u", cmd32->d[0]); |
| 1168 | } |
| 1169 | break; |
| 1170 | |
| 1171 | case O_GID: |
| 1172 | { |
| 1173 | struct group *grp = getgrgid(cmd32->d[0]); |
| 1174 | |
| 1175 | if (grp) |
| 1176 | printf(" gid %s", grp->gr_name); |
| 1177 | else |
| 1178 | printf(" gid %u", cmd32->d[0]); |
| 1179 | } |
| 1180 | break; |
| 1181 | |
| 1182 | case O_KEEP_STATE: |
| 1183 | printf(" keep-state"); |
| 1184 | break; |
| 1185 | |
| 1186 | case O_LIMIT: |
| 1187 | { |
| 1188 | struct _s_x *p = limit_masks; |
| 1189 | ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; |
| 1190 | u_int8_t x = c->limit_mask; |
| 1191 | const char *comma = " "; |
| 1192 | |
| 1193 | printf(" limit"); |
| 1194 | for ( ; p->x != 0 ; p++) |
| 1195 | if ((x & p->x) == p->x) { |
| 1196 | x &= ~p->x; |
| 1197 | printf("%s%s", comma, p->s); |
| 1198 | comma = ","; |
| 1199 | } |
| 1200 | printf(" %d", c->conn_limit); |
| 1201 | } |
| 1202 | break; |
| 1203 | |
| 1204 | default: |
| 1205 | printf(" [opcode %d len %d]", |
| 1206 | cmd->opcode, cmd->len); |
| 1207 | } |
| 1208 | } |
| 1209 | if (cmd->len & F_OR) { |
| 1210 | printf(" or"); |
| 1211 | or_block = 1; |
| 1212 | } else if (or_block) { |
| 1213 | printf(" }"); |
| 1214 | or_block = 0; |
| 1215 | } |
| 1216 | } |
| 1217 | show_prerequisites(&flags, HAVE_IP, 0); |
| 1218 | |
| 1219 | printf("\n"); |
| 1220 | } |
| 1221 | |
| 1222 | static void |
| 1223 | show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth) |
| 1224 | { |
| 1225 | struct protoent *pe; |
| 1226 | struct in_addr a; |
| 1227 | |
| 1228 | if (!do_expired) { |
| 1229 | if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) |
| 1230 | return; |
| 1231 | } |
| 1232 | |
| 1233 | printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt, |
| 1234 | bcwidth, (uintmax_t)d->bcnt, d->expire); |
| 1235 | switch (d->dyn_type) { |
| 1236 | case O_LIMIT_PARENT: |
| 1237 | printf(" PARENT %d", d->count); |
| 1238 | break; |
| 1239 | case O_LIMIT: |
| 1240 | printf(" LIMIT"); |
| 1241 | break; |
| 1242 | case O_KEEP_STATE: /* bidir, no mask */ |
| 1243 | printf(" STATE"); |
| 1244 | break; |
| 1245 | } |
| 1246 | |
| 1247 | if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL) |
| 1248 | printf(" %s", pe->p_name); |
| 1249 | else |
| 1250 | printf(" proto %u", d->id.u.ip.proto); |
| 1251 | |
| 1252 | a.s_addr = htonl(d->id.u.ip.src_ip); |
| 1253 | printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port); |
| 1254 | |
| 1255 | a.s_addr = htonl(d->id.u.ip.dst_ip); |
| 1256 | printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port); |
| 1257 | printf("\n"); |
| 1258 | } |
| 1259 | |
| 1260 | static int |
| 1261 | sort_q(const void *pa, const void *pb) |
| 1262 | { |
| 1263 | int rev = (do_sort < 0); |
| 1264 | int field = rev ? -do_sort : do_sort; |
| 1265 | long long res = 0; |
| 1266 | const struct dn_ioc_flowqueue *a = pa; |
| 1267 | const struct dn_ioc_flowqueue *b = pb; |
| 1268 | |
| 1269 | switch (field) { |
| 1270 | case 1: /* pkts */ |
| 1271 | res = a->len - b->len; |
| 1272 | break; |
| 1273 | case 2: /* bytes */ |
| 1274 | res = a->len_bytes - b->len_bytes; |
| 1275 | break; |
| 1276 | |
| 1277 | case 3: /* tot pkts */ |
| 1278 | res = a->tot_pkts - b->tot_pkts; |
| 1279 | break; |
| 1280 | |
| 1281 | case 4: /* tot bytes */ |
| 1282 | res = a->tot_bytes - b->tot_bytes; |
| 1283 | break; |
| 1284 | } |
| 1285 | if (res < 0) |
| 1286 | res = -1; |
| 1287 | if (res > 0) |
| 1288 | res = 1; |
| 1289 | return (int)(rev ? res : -res); |
| 1290 | } |
| 1291 | |
| 1292 | static void |
| 1293 | list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q) |
| 1294 | { |
| 1295 | int l; |
| 1296 | |
| 1297 | printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n", |
| 1298 | fs->flow_mask.u.ip.proto, |
| 1299 | fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port, |
| 1300 | fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port); |
| 1301 | if (fs->rq_elements == 0) |
| 1302 | return; |
| 1303 | |
| 1304 | printf("BKT Prot ___Source IP/port____ " |
| 1305 | "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n"); |
| 1306 | if (do_sort != 0) |
| 1307 | heapsort(q, fs->rq_elements, sizeof(*q), sort_q); |
| 1308 | for (l = 0; l < fs->rq_elements; l++) { |
| 1309 | struct in_addr ina; |
| 1310 | struct protoent *pe; |
| 1311 | |
| 1312 | ina.s_addr = htonl(q[l].id.u.ip.src_ip); |
| 1313 | printf("%3d ", q[l].hash_slot); |
| 1314 | pe = getprotobynumber(q[l].id.u.ip.proto); |
| 1315 | if (pe) |
| 1316 | printf("%-4s ", pe->p_name); |
| 1317 | else |
| 1318 | printf("%4u ", q[l].id.u.ip.proto); |
| 1319 | printf("%15s/%-5d ", |
| 1320 | inet_ntoa(ina), q[l].id.u.ip.src_port); |
| 1321 | ina.s_addr = htonl(q[l].id.u.ip.dst_ip); |
| 1322 | printf("%15s/%-5d ", |
| 1323 | inet_ntoa(ina), q[l].id.u.ip.dst_port); |
| 1324 | printf("%4ju %8ju %2u %4u %3u\n", |
| 1325 | (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes, |
| 1326 | q[l].len, q[l].len_bytes, q[l].drops); |
| 1327 | if (verbose) |
| 1328 | printf(" S %20ju F %20ju\n", |
| 1329 | (uintmax_t)q[l].S, (uintmax_t)q[l].F); |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | static void |
| 1334 | print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix) |
| 1335 | { |
| 1336 | int l; |
| 1337 | char qs[30]; |
| 1338 | char plr[30]; |
| 1339 | char red[90]; /* Display RED parameters */ |
| 1340 | |
| 1341 | l = fs->qsize; |
| 1342 | if (fs->flags_fs & DN_QSIZE_IS_BYTES) { |
| 1343 | if (l >= 8192) |
| 1344 | sprintf(qs, "%d KB", l / 1024); |
| 1345 | else |
| 1346 | sprintf(qs, "%d B", l); |
| 1347 | } else |
| 1348 | sprintf(qs, "%3d sl.", l); |
| 1349 | if (fs->plr) |
| 1350 | sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff)); |
| 1351 | else |
| 1352 | plr[0] = '\0'; |
| 1353 | if (fs->flags_fs & DN_IS_RED) /* RED parameters */ |
| 1354 | sprintf(red, |
| 1355 | "\n\t %cRED w_q %f min_th %d max_th %d max_p %f", |
| 1356 | (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ', |
| 1357 | 1.0 * fs->w_q / (double)(1 << SCALE_RED), |
| 1358 | SCALE_VAL(fs->min_th), |
| 1359 | SCALE_VAL(fs->max_th), |
| 1360 | 1.0 * fs->max_p / (double)(1 << SCALE_RED)); |
| 1361 | else |
| 1362 | sprintf(red, "droptail"); |
| 1363 | |
| 1364 | printf("%s %s%s %d queues (%d buckets) %s\n", |
| 1365 | prefix, qs, plr, fs->rq_elements, fs->rq_size, red); |
| 1366 | } |
| 1367 | |
| 1368 | static void |
| 1369 | list_pipes(void *data, int nbytes, int ac, char *av[]) |
| 1370 | { |
| 1371 | u_long rulenum; |
| 1372 | void *next = data; |
| 1373 | struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data; |
| 1374 | struct dn_ioc_flowset *fs; |
| 1375 | struct dn_ioc_flowqueue *q; |
| 1376 | int l; |
| 1377 | |
| 1378 | if (ac > 0) |
| 1379 | rulenum = strtoul(*av++, NULL, 10); |
| 1380 | else |
| 1381 | rulenum = 0; |
| 1382 | for (; nbytes >= (int)sizeof(*p); p = (struct dn_ioc_pipe *)next) { |
| 1383 | double b = p->bandwidth; |
| 1384 | char buf[30]; |
| 1385 | char prefix[80]; |
| 1386 | |
| 1387 | if (p->fs.fs_type != DN_IS_PIPE) |
| 1388 | break; /* done with pipes, now queues */ |
| 1389 | |
| 1390 | /* |
| 1391 | * compute length, as pipe have variable size |
| 1392 | */ |
| 1393 | l = sizeof(*p) + p->fs.rq_elements * sizeof(*q); |
| 1394 | next = (uint8_t *)p + l; |
| 1395 | nbytes -= l; |
| 1396 | |
| 1397 | if (rulenum != 0 && rulenum != (u_long)p->pipe_nr) |
| 1398 | continue; |
| 1399 | |
| 1400 | /* |
| 1401 | * Print rate |
| 1402 | */ |
| 1403 | if (b == 0) |
| 1404 | sprintf(buf, "unlimited"); |
| 1405 | else if (b >= 1000000) |
| 1406 | sprintf(buf, "%7.3f Mbit/s", b/1000000); |
| 1407 | else if (b >= 1000) |
| 1408 | sprintf(buf, "%7.3f Kbit/s", b/1000); |
| 1409 | else |
| 1410 | sprintf(buf, "%7.3f bit/s ", b); |
| 1411 | |
| 1412 | sprintf(prefix, "%05d: %s %4d ms ", |
| 1413 | p->pipe_nr, buf, p->delay); |
| 1414 | print_flowset_parms(&p->fs, prefix); |
| 1415 | if (verbose) |
| 1416 | printf(" V %20ju\n", (uintmax_t)p->V >> MY_M); |
| 1417 | |
| 1418 | q = (struct dn_ioc_flowqueue *)(p+1); |
| 1419 | list_queues(&p->fs, q); |
| 1420 | } |
| 1421 | for (fs = next; nbytes >= (int)sizeof(*fs); fs = next) { |
| 1422 | char prefix[80]; |
| 1423 | |
| 1424 | if (fs->fs_type != DN_IS_QUEUE) |
| 1425 | break; |
| 1426 | l = sizeof(*fs) + fs->rq_elements * sizeof(*q); |
| 1427 | next = (uint8_t *)fs + l; |
| 1428 | nbytes -= l; |
| 1429 | q = (struct dn_ioc_flowqueue *)(fs+1); |
| 1430 | sprintf(prefix, "q%05d: weight %d pipe %d ", |
| 1431 | fs->fs_nr, fs->weight, fs->parent_nr); |
| 1432 | print_flowset_parms(fs, prefix); |
| 1433 | list_queues(fs, q); |
| 1434 | } |
| 1435 | } |
| 1436 | |
| 1437 | /* |
| 1438 | * This one handles all set-related commands |
| 1439 | * ipfw set { show | enable | disable } |
| 1440 | * ipfw set swap X Y |
| 1441 | * ipfw set move X to Y |
| 1442 | * ipfw set move rule X to Y |
| 1443 | */ |
| 1444 | static void |
| 1445 | sets_handler(int ac, char *av[]) |
| 1446 | { |
| 1447 | u_int32_t set_disable, masks[2]; |
| 1448 | int i, nbytes; |
| 1449 | u_int16_t rulenum; |
| 1450 | u_int8_t cmd, new_set; |
| 1451 | |
| 1452 | ac--; |
| 1453 | av++; |
| 1454 | |
| 1455 | if (!ac) |
| 1456 | errx(EX_USAGE, "set needs command"); |
| 1457 | if (!strncmp(*av, "show", strlen(*av)) ) { |
| 1458 | void *data; |
| 1459 | const char *msg; |
| 1460 | |
| 1461 | nbytes = sizeof(struct ipfw_ioc_rule); |
| 1462 | if ((data = malloc(nbytes)) == NULL) |
| 1463 | err(EX_OSERR, "malloc"); |
| 1464 | if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0) |
| 1465 | err(EX_OSERR, "getsockopt(IP_FW_GET)"); |
| 1466 | set_disable = ((struct ipfw_ioc_rule *)data)->set_disable; |
| 1467 | |
| 1468 | for (i = 0, msg = "disable" ; i < 31; i++) |
| 1469 | if ( (set_disable & (1<<i))) { |
| 1470 | printf("%s %d", msg, i); |
| 1471 | msg = ""; |
| 1472 | } |
| 1473 | msg = (set_disable) ? " enable" : "enable"; |
| 1474 | for (i = 0; i < 31; i++) |
| 1475 | if ( !(set_disable & (1<<i))) { |
| 1476 | printf("%s %d", msg, i); |
| 1477 | msg = ""; |
| 1478 | } |
| 1479 | printf("\n"); |
| 1480 | } else if (!strncmp(*av, "swap", strlen(*av))) { |
| 1481 | ac--; av++; |
| 1482 | if (ac != 2) |
| 1483 | errx(EX_USAGE, "set swap needs 2 set numbers\n"); |
| 1484 | rulenum = atoi(av[0]); |
| 1485 | new_set = atoi(av[1]); |
| 1486 | if (!isdigit(*(av[0])) || rulenum > 30) |
| 1487 | errx(EX_DATAERR, "invalid set number %s\n", av[0]); |
| 1488 | if (!isdigit(*(av[1])) || new_set > 30) |
| 1489 | errx(EX_DATAERR, "invalid set number %s\n", av[1]); |
| 1490 | masks[0] = (4 << 24) | (new_set << 16) | (rulenum); |
| 1491 | i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, |
| 1492 | masks, sizeof(u_int32_t)); |
| 1493 | } else if (!strncmp(*av, "move", strlen(*av))) { |
| 1494 | ac--; av++; |
| 1495 | if (ac && !strncmp(*av, "rule", strlen(*av))) { |
| 1496 | cmd = 2; |
| 1497 | ac--; av++; |
| 1498 | } else |
| 1499 | cmd = 3; |
| 1500 | if (ac != 3 || strncmp(av[1], "to", strlen(*av))) |
| 1501 | errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); |
| 1502 | rulenum = atoi(av[0]); |
| 1503 | new_set = atoi(av[2]); |
| 1504 | if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) || |
| 1505 | (cmd == 2 && rulenum == 65535) ) |
| 1506 | errx(EX_DATAERR, "invalid source number %s\n", av[0]); |
| 1507 | if (!isdigit(*(av[2])) || new_set > 30) |
| 1508 | errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); |
| 1509 | masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); |
| 1510 | i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, |
| 1511 | masks, sizeof(u_int32_t)); |
| 1512 | } else if (!strncmp(*av, "disable", strlen(*av)) || |
| 1513 | !strncmp(*av, "enable", strlen(*av)) ) { |
| 1514 | int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0; |
| 1515 | |
| 1516 | ac--; av++; |
| 1517 | masks[0] = masks[1] = 0; |
| 1518 | |
| 1519 | while (ac) { |
| 1520 | if (isdigit(**av)) { |
| 1521 | i = atoi(*av); |
| 1522 | if (i < 0 || i > 30) |
| 1523 | errx(EX_DATAERR, |
| 1524 | "invalid set number %d\n", i); |
| 1525 | masks[which] |= (1<<i); |
| 1526 | } else if (!strncmp(*av, "disable", strlen(*av))) |
| 1527 | which = 0; |
| 1528 | else if (!strncmp(*av, "enable", strlen(*av))) |
| 1529 | which = 1; |
| 1530 | else |
| 1531 | errx(EX_DATAERR, |
| 1532 | "invalid set command %s\n", *av); |
| 1533 | av++; ac--; |
| 1534 | } |
| 1535 | if ( (masks[0] & masks[1]) != 0 ) |
| 1536 | errx(EX_DATAERR, |
| 1537 | "cannot enable and disable the same set\n"); |
| 1538 | |
| 1539 | i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks)); |
| 1540 | if (i) |
| 1541 | warn("set enable/disable: setsockopt(IP_FW_DEL)"); |
| 1542 | } else |
| 1543 | errx(EX_USAGE, "invalid set command %s\n", *av); |
| 1544 | } |
| 1545 | |
| 1546 | static void |
| 1547 | sysctl_handler(int ac, char *av[], int which) |
| 1548 | { |
| 1549 | ac--; |
| 1550 | av++; |
| 1551 | |
| 1552 | if (*av == NULL) { |
| 1553 | warnx("missing keyword to enable/disable\n"); |
| 1554 | } else if (strncmp(*av, "firewall", strlen(*av)) == 0) { |
| 1555 | sysctlbyname("net.inet.ip.fw.enable", NULL, 0, |
| 1556 | &which, sizeof(which)); |
| 1557 | } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) { |
| 1558 | sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, |
| 1559 | &which, sizeof(which)); |
| 1560 | } else if (strncmp(*av, "debug", strlen(*av)) == 0) { |
| 1561 | sysctlbyname("net.inet.ip.fw.debug", NULL, 0, |
| 1562 | &which, sizeof(which)); |
| 1563 | } else if (strncmp(*av, "verbose", strlen(*av)) == 0) { |
| 1564 | sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, |
| 1565 | &which, sizeof(which)); |
| 1566 | } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) { |
| 1567 | sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, |
| 1568 | &which, sizeof(which)); |
| 1569 | } else { |
| 1570 | warnx("unrecognize enable/disable keyword: %s\n", *av); |
| 1571 | } |
| 1572 | } |
| 1573 | |
| 1574 | static void |
| 1575 | list(int ac, char *av[]) |
| 1576 | { |
| 1577 | struct ipfw_ioc_rule *r; |
| 1578 | struct ipfw_ioc_state *dynrules, *d; |
| 1579 | |
| 1580 | void *data = NULL; |
| 1581 | int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; |
| 1582 | int exitval = EX_OK; |
| 1583 | int lac; |
| 1584 | char **lav; |
| 1585 | u_long rnum; |
| 1586 | char *endptr; |
| 1587 | int seen = 0; |
| 1588 | |
| 1589 | const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; |
| 1590 | int nalloc = 1024; /* start somewhere... */ |
| 1591 | |
| 1592 | ac--; |
| 1593 | av++; |
| 1594 | |
| 1595 | /* get rules or pipes from kernel, resizing array as necessary */ |
| 1596 | nbytes = nalloc; |
| 1597 | |
| 1598 | while (nbytes >= nalloc) { |
| 1599 | nalloc = nalloc * 2 + 200; |
| 1600 | nbytes = nalloc; |
| 1601 | if ((data = realloc(data, nbytes)) == NULL) |
| 1602 | err(EX_OSERR, "realloc"); |
| 1603 | if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0) |
| 1604 | err(EX_OSERR, "getsockopt(IP_%s_GET)", |
| 1605 | do_pipe ? "DUMMYNET" : "FW"); |
| 1606 | } |
| 1607 | |
| 1608 | if (do_pipe) { |
| 1609 | list_pipes(data, nbytes, ac, av); |
| 1610 | goto done; |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * Count static rules. |
| 1615 | */ |
| 1616 | r = data; |
| 1617 | nstat = r->static_count; |
| 1618 | |
| 1619 | /* |
| 1620 | * Count dynamic rules. This is easier as they have |
| 1621 | * fixed size. |
| 1622 | */ |
| 1623 | dynrules = (struct ipfw_ioc_state *)((uint8_t *)r + r->static_len); |
| 1624 | ndyn = (nbytes - r->static_len) / sizeof(*dynrules); |
| 1625 | |
| 1626 | /* if showing stats, figure out column widths ahead of time */ |
| 1627 | bcwidth = pcwidth = 0; |
| 1628 | if (do_acct) { |
| 1629 | for (n = 0, r = data; n < nstat; n++, |
| 1630 | r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) { |
| 1631 | /* packet counter */ |
| 1632 | width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt); |
| 1633 | if (width > pcwidth) |
| 1634 | pcwidth = width; |
| 1635 | |
| 1636 | /* byte counter */ |
| 1637 | width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt); |
| 1638 | if (width > bcwidth) |
| 1639 | bcwidth = width; |
| 1640 | } |
| 1641 | } |
| 1642 | if (do_dynamic && ndyn) { |
| 1643 | for (n = 0, d = dynrules; n < ndyn; n++, d++) { |
| 1644 | width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt); |
| 1645 | if (width > pcwidth) |
| 1646 | pcwidth = width; |
| 1647 | |
| 1648 | width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt); |
| 1649 | if (width > bcwidth) |
| 1650 | bcwidth = width; |
| 1651 | } |
| 1652 | } |
| 1653 | /* if no rule numbers were specified, list all rules */ |
| 1654 | if (ac == 0) { |
| 1655 | for (n = 0, r = data; n < nstat; n++, |
| 1656 | r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) |
| 1657 | show_ipfw(r, pcwidth, bcwidth); |
| 1658 | |
| 1659 | if (do_dynamic && ndyn) { |
| 1660 | printf("## Dynamic rules (%d):\n", ndyn); |
| 1661 | for (n = 0, d = dynrules; n < ndyn; n++, d++) |
| 1662 | show_dyn_ipfw(d, pcwidth, bcwidth); |
| 1663 | } |
| 1664 | goto done; |
| 1665 | } |
| 1666 | |
| 1667 | /* display specific rules requested on command line */ |
| 1668 | |
| 1669 | for (lac = ac, lav = av; lac != 0; lac--) { |
| 1670 | /* convert command line rule # */ |
| 1671 | rnum = strtoul(*lav++, &endptr, 10); |
| 1672 | if (*endptr) { |
| 1673 | exitval = EX_USAGE; |
| 1674 | warnx("invalid rule number: %s", *(lav - 1)); |
| 1675 | continue; |
| 1676 | } |
| 1677 | for (n = seen = 0, r = data; n < nstat; n++, |
| 1678 | r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) { |
| 1679 | if (r->rulenum > rnum) |
| 1680 | break; |
| 1681 | if (r->rulenum == rnum) { |
| 1682 | show_ipfw(r, pcwidth, bcwidth); |
| 1683 | seen = 1; |
| 1684 | } |
| 1685 | } |
| 1686 | if (!seen) { |
| 1687 | /* give precedence to other error(s) */ |
| 1688 | if (exitval == EX_OK) |
| 1689 | exitval = EX_UNAVAILABLE; |
| 1690 | warnx("rule %lu does not exist", rnum); |
| 1691 | } |
| 1692 | } |
| 1693 | |
| 1694 | if (do_dynamic && ndyn) { |
| 1695 | printf("## Dynamic rules:\n"); |
| 1696 | for (lac = ac, lav = av; lac != 0; lac--) { |
| 1697 | rnum = strtoul(*lav++, &endptr, 10); |
| 1698 | if (*endptr) |
| 1699 | /* already warned */ |
| 1700 | continue; |
| 1701 | for (n = 0, d = dynrules; n < ndyn; n++, d++) { |
| 1702 | if (d->rulenum > rnum) |
| 1703 | break; |
| 1704 | if (d->rulenum == rnum) |
| 1705 | show_dyn_ipfw(d, pcwidth, bcwidth); |
| 1706 | } |
| 1707 | } |
| 1708 | } |
| 1709 | |
| 1710 | ac = 0; |
| 1711 | |
| 1712 | done: |
| 1713 | free(data); |
| 1714 | |
| 1715 | if (exitval != EX_OK) |
| 1716 | exit(exitval); |
| 1717 | } |
| 1718 | |
| 1719 | static void |
| 1720 | show_usage(void) |
| 1721 | { |
| 1722 | fprintf(stderr, "usage: ipfw [options]\n" |
| 1723 | " add [number] rule\n" |
| 1724 | " pipe number config [pipeconfig]\n" |
| 1725 | " queue number config [queueconfig]\n" |
| 1726 | " [pipe] flush\n" |
| 1727 | " [pipe] delete number ...\n" |
| 1728 | " [pipe] {list|show} [number ...]\n" |
| 1729 | " {zero|resetlog} [number ...]\n" |
| 1730 | "do \"ipfw -h\" or see ipfw manpage for details\n" |
| 1731 | ); |
| 1732 | |
| 1733 | exit(EX_USAGE); |
| 1734 | } |
| 1735 | |
| 1736 | static void |
| 1737 | help(void) |
| 1738 | { |
| 1739 | |
| 1740 | fprintf(stderr, "ipfw syntax summary:\n" |
| 1741 | "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n" |
| 1742 | "ipfw {pipe|queue} N config BODY\n" |
| 1743 | "ipfw [pipe] {zero|delete|show} [N{,N}]\n" |
| 1744 | "\n" |
| 1745 | "RULE: [1..] [PROB] BODY\n" |
| 1746 | "RULENUM: INTEGER(1..65534)\n" |
| 1747 | "PROB: prob REAL(0..1)\n" |
| 1748 | "BODY: check-state [LOG] (no body) |\n" |
| 1749 | " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n" |
| 1750 | "ACTION: check-state | allow | count | deny | reject | skipto N |\n" |
| 1751 | " {divert|tee} PORT | forward ADDR | pipe N | queue N\n" |
| 1752 | "ADDR: [ MAC dst src ether_type ] \n" |
| 1753 | " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n" |
| 1754 | "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n" |
| 1755 | "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n" |
| 1756 | "OPTION_LIST: OPTION [,OPTION_LIST]\n" |
| 1757 | ); |
| 1758 | exit(0); |
| 1759 | } |
| 1760 | |
| 1761 | |
| 1762 | static int |
| 1763 | lookup_host (char *host, struct in_addr *ipaddr) |
| 1764 | { |
| 1765 | struct hostent *he; |
| 1766 | |
| 1767 | if (!inet_aton(host, ipaddr)) { |
| 1768 | if ((he = gethostbyname(host)) == NULL) |
| 1769 | return(-1); |
| 1770 | *ipaddr = *(struct in_addr *)he->h_addr_list[0]; |
| 1771 | } |
| 1772 | return(0); |
| 1773 | } |
| 1774 | |
| 1775 | /* |
| 1776 | * fills the addr and mask fields in the instruction as appropriate from av. |
| 1777 | * Update length as appropriate. |
| 1778 | * The following formats are allowed: |
| 1779 | * any matches any IP. Actually returns an empty instruction. |
| 1780 | * me returns O_IP_*_ME |
| 1781 | * 1.2.3.4 single IP address |
| 1782 | * 1.2.3.4:5.6.7.8 address:mask |
| 1783 | * 1.2.3.4/24 address/mask |
| 1784 | * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet |
| 1785 | */ |
| 1786 | static void |
| 1787 | fill_ip(ipfw_insn_ip *cmd, char *av) |
| 1788 | { |
| 1789 | char *p = NULL, md = 0; |
| 1790 | u_int32_t i; |
| 1791 | |
| 1792 | cmd->o.len &= ~F_LEN_MASK; /* zero len */ |
| 1793 | |
| 1794 | if (!strncmp(av, "any", strlen(av))) |
| 1795 | return; |
| 1796 | |
| 1797 | if (!strncmp(av, "me", strlen(av))) { |
| 1798 | cmd->o.len |= F_INSN_SIZE(ipfw_insn); |
| 1799 | return; |
| 1800 | } |
| 1801 | |
| 1802 | if (strlen(av) >= 3 && av[0] == '<' && av[strlen(av) - 1] == '>') { |
| 1803 | int pos = strlen(av) - 1; |
| 1804 | uint16_t tableid; |
| 1805 | char *eptr; |
| 1806 | |
| 1807 | /* |
| 1808 | * Table: "<tableid>" |
| 1809 | */ |
| 1810 | av[pos] = '\0'; |
| 1811 | tableid = strtoul(&av[1], &eptr, 0); |
| 1812 | if (*eptr != '\0') { |
| 1813 | av[pos] = '>'; |
| 1814 | errx(EX_DATAERR, "invalid tableid ``%s''", av); |
| 1815 | } |
| 1816 | av[pos] = '>'; |
| 1817 | cmd->o.len |= F_INSN_SIZE(ipfw_insn); |
| 1818 | cmd->o.opcode = O_IP_DST_TABLE; |
| 1819 | cmd->o.arg1 = tableid; |
| 1820 | return; |
| 1821 | } |
| 1822 | |
| 1823 | p = strchr(av, '/'); |
| 1824 | if (!p) |
| 1825 | p = strchr(av, ':'); |
| 1826 | if (p) { |
| 1827 | md = *p; |
| 1828 | *p++ = '\0'; |
| 1829 | } |
| 1830 | |
| 1831 | if (lookup_host(av, &cmd->addr) != 0) |
| 1832 | errx(EX_NOHOST, "hostname ``%s'' unknown", av); |
| 1833 | switch (md) { |
| 1834 | case ':': |
| 1835 | if (!inet_aton(p, &cmd->mask)) |
| 1836 | errx(EX_DATAERR, "bad netmask ``%s''", p); |
| 1837 | break; |
| 1838 | case '/': |
| 1839 | i = atoi(p); |
| 1840 | if (i == 0) |
| 1841 | cmd->mask.s_addr = htonl(0); |
| 1842 | else if (i > 32) |
| 1843 | errx(EX_DATAERR, "bad width ``%s''", p); |
| 1844 | else |
| 1845 | cmd->mask.s_addr = htonl(~0 << (32 - i)); |
| 1846 | break; |
| 1847 | default: |
| 1848 | cmd->mask.s_addr = htonl(~0); |
| 1849 | break; |
| 1850 | } |
| 1851 | cmd->addr.s_addr &= cmd->mask.s_addr; |
| 1852 | /* |
| 1853 | * now look if we have a set of addresses. They are stored as follows: |
| 1854 | * arg1 is the set size (powers of 2, 2..256) |
| 1855 | * addr is the base address IN HOST FORMAT |
| 1856 | * mask.. is an array of u_int32_t with bits set. |
| 1857 | */ |
| 1858 | if (p) |
| 1859 | p = strchr(p, '{'); |
| 1860 | if (p) { /* fetch addresses */ |
| 1861 | u_int32_t *d; |
| 1862 | int low, high; |
| 1863 | int ii = contigmask((u_char *)&(cmd->mask), 32); |
| 1864 | |
| 1865 | if (ii < 24 || ii > 31) { |
| 1866 | fprintf(stderr, "invalid set with mask %d\n", |
| 1867 | ii); |
| 1868 | exit(0); |
| 1869 | } |
| 1870 | cmd->o.arg1 = 1<<(32-ii); |
| 1871 | cmd->addr.s_addr = ntohl(cmd->addr.s_addr); |
| 1872 | d = (u_int32_t *)&cmd->mask; |
| 1873 | cmd->o.opcode = O_IP_DST_SET; /* default */ |
| 1874 | cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; |
| 1875 | for (ii = 0; ii < (cmd->o.arg1+31)/32 ; ii++) |
| 1876 | d[ii] = 0; /* clear masks */ |
| 1877 | |
| 1878 | av = p+1; |
| 1879 | low = cmd->addr.s_addr & 0xff; |
| 1880 | high = low + cmd->o.arg1 - 1; |
| 1881 | while (isdigit(*av)) { |
| 1882 | char *str; |
| 1883 | u_int16_t a = strtol(av, &str, 0); |
| 1884 | |
| 1885 | if (str == av) /* no parameter */ |
| 1886 | break; |
| 1887 | if (a < low || a > high) { |
| 1888 | fprintf(stderr, "addr %d out of range [%d-%d]\n", |
| 1889 | a, low, high); |
| 1890 | exit(0); |
| 1891 | } |
| 1892 | a -= low; |
| 1893 | d[ a/32] |= 1<<(a & 31); |
| 1894 | if (*str != ',') |
| 1895 | break; |
| 1896 | av = str+1; |
| 1897 | } |
| 1898 | return; |
| 1899 | } |
| 1900 | |
| 1901 | if (cmd->mask.s_addr == 0) { /* any */ |
| 1902 | if (cmd->o.len & F_NOT) |
| 1903 | errx(EX_DATAERR, "not any never matches"); |
| 1904 | else /* useless, nuke it */ |
| 1905 | return; |
| 1906 | } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */ |
| 1907 | cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); |
| 1908 | else /* addr/mask */ |
| 1909 | cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip); |
| 1910 | } |
| 1911 | |
| 1912 | |
| 1913 | /* |
| 1914 | * helper function to process a set of flags and set bits in the |
| 1915 | * appropriate masks. |
| 1916 | */ |
| 1917 | static void |
| 1918 | fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, |
| 1919 | struct _s_x *flags, char *p) |
| 1920 | { |
| 1921 | u_int8_t set=0, clear=0; |
| 1922 | |
| 1923 | while (p && *p) { |
| 1924 | char *q; /* points to the separator */ |
| 1925 | int val; |
| 1926 | u_int8_t *which; /* mask we are working on */ |
| 1927 | |
| 1928 | if (*p == '!') { |
| 1929 | p++; |
| 1930 | which = &clear; |
| 1931 | } else |
| 1932 | which = &set; |
| 1933 | q = strchr(p, ','); |
| 1934 | if (q) |
| 1935 | *q++ = '\0'; |
| 1936 | val = match_token(flags, p); |
| 1937 | if (val <= 0) |
| 1938 | errx(EX_DATAERR, "invalid flag %s", p); |
| 1939 | *which |= (u_int8_t)val; |
| 1940 | p = q; |
| 1941 | } |
| 1942 | cmd->opcode = opcode; |
| 1943 | cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; |
| 1944 | cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); |
| 1945 | } |
| 1946 | |
| 1947 | |
| 1948 | static void |
| 1949 | delete(int ac, char *av[]) |
| 1950 | { |
| 1951 | u_int32_t rulenum; |
| 1952 | struct dn_ioc_pipe pipe; |
| 1953 | int i; |
| 1954 | int exitval = EX_OK; |
| 1955 | int do_set = 0; |
| 1956 | |
| 1957 | memset(&pipe, 0, sizeof pipe); |
| 1958 | |
| 1959 | av++; ac--; |
| 1960 | if (ac > 0 && !strncmp(*av, "set", strlen(*av))) { |
| 1961 | do_set = 1; /* delete set */ |
| 1962 | ac--; av++; |
| 1963 | } |
| 1964 | |
| 1965 | /* Rule number */ |
| 1966 | while (ac && isdigit(**av)) { |
| 1967 | i = atoi(*av); av++; ac--; |
| 1968 | if (do_pipe) { |
| 1969 | if (do_pipe == 1) |
| 1970 | pipe.pipe_nr = i; |
| 1971 | else |
| 1972 | pipe.fs.fs_nr = i; |
| 1973 | i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL, |
| 1974 | &pipe, sizeof pipe); |
| 1975 | if (i) { |
| 1976 | exitval = 1; |
| 1977 | warn("rule %u: setsockopt(IP_DUMMYNET_DEL)", |
| 1978 | do_pipe == 1 ? pipe.pipe_nr : |
| 1979 | pipe.fs.fs_nr); |
| 1980 | } |
| 1981 | } else { |
| 1982 | rulenum = (i & 0xffff) | (do_set << 24); |
| 1983 | i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum, |
| 1984 | sizeof rulenum); |
| 1985 | if (i) { |
| 1986 | exitval = EX_UNAVAILABLE; |
| 1987 | warn("rule %u: setsockopt(IP_FW_DEL)", |
| 1988 | rulenum); |
| 1989 | } |
| 1990 | } |
| 1991 | } |
| 1992 | if (exitval != EX_OK) |
| 1993 | exit(exitval); |
| 1994 | } |
| 1995 | |
| 1996 | |
| 1997 | /* |
| 1998 | * fill the interface structure. We do not check the name as we can |
| 1999 | * create interfaces dynamically, so checking them at insert time |
| 2000 | * makes relatively little sense. |
| 2001 | * Interface names containing '*', '?', or '[' are assumed to be shell |
| 2002 | * patterns which match interfaces. |
| 2003 | */ |
| 2004 | static void |
| 2005 | fill_iface(ipfw_insn_if *cmd, char *arg) |
| 2006 | { |
| 2007 | cmd->name[0] = '\0'; |
| 2008 | cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); |
| 2009 | |
| 2010 | /* Parse the interface or address */ |
| 2011 | if (!strcmp(arg, "any")) |
| 2012 | cmd->o.len = 0; /* effectively ignore this command */ |
| 2013 | else if (!isdigit(*arg)) { |
| 2014 | strlcpy(cmd->name, arg, sizeof(cmd->name)); |
| 2015 | cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; |
| 2016 | } else if (!inet_aton(arg, &cmd->p.ip)) |
| 2017 | errx(EX_DATAERR, "bad ip address ``%s''", arg); |
| 2018 | } |
| 2019 | |
| 2020 | static unsigned long |
| 2021 | getbw(const char *str, u_short *flags, int kb) |
| 2022 | { |
| 2023 | char *end; |
| 2024 | unsigned long val; |
| 2025 | int inbytes = 0; |
| 2026 | |
| 2027 | val = strtoul(str, &end, 0); |
| 2028 | if (*end == 'k' || *end == 'K') { |
| 2029 | ++end; |
| 2030 | val *= kb; |
| 2031 | } else if (*end == 'm' || *end == 'M') { |
| 2032 | ++end; |
| 2033 | val *= kb * kb; |
| 2034 | } |
| 2035 | |
| 2036 | /* |
| 2037 | * Deal with bits or bytes or b(bits) or B(bytes). If there is no |
| 2038 | * trailer assume bits. |
| 2039 | */ |
| 2040 | if (strncasecmp(end, "bit", 3) == 0) { |
| 2041 | ; |
| 2042 | } else if (strncasecmp(end, "byte", 4) == 0) { |
| 2043 | inbytes = 1; |
| 2044 | } else if (*end == 'b') { |
| 2045 | ; |
| 2046 | } else if (*end == 'B') { |
| 2047 | inbytes = 1; |
| 2048 | } |
| 2049 | |
| 2050 | /* |
| 2051 | * Return in bits if flags is NULL, else flag bits |
| 2052 | * or bytes in flags and return the unconverted value. |
| 2053 | */ |
| 2054 | if (inbytes && flags) |
| 2055 | *flags |= DN_QSIZE_IS_BYTES; |
| 2056 | else if (inbytes && flags == NULL) |
| 2057 | val *= 8; |
| 2058 | return(val); |
| 2059 | } |
| 2060 | |
| 2061 | /* |
| 2062 | * the following macro returns an error message if we run out of |
| 2063 | * arguments. |
| 2064 | */ |
| 2065 | #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);} |
| 2066 | |
| 2067 | static void |
| 2068 | config_pipe(int ac, char **av) |
| 2069 | { |
| 2070 | struct dn_ioc_pipe pipe; |
| 2071 | int i; |
| 2072 | char *end; |
| 2073 | u_int32_t a; |
| 2074 | |
| 2075 | memset(&pipe, 0, sizeof pipe); |
| 2076 | |
| 2077 | av++; ac--; |
| 2078 | /* Pipe number */ |
| 2079 | if (ac && isdigit(**av)) { |
| 2080 | i = atoi(*av); av++; ac--; |
| 2081 | if (do_pipe == 1) |
| 2082 | pipe.pipe_nr = i; |
| 2083 | else |
| 2084 | pipe.fs.fs_nr = i; |
| 2085 | } |
| 2086 | while (ac > 0) { |
| 2087 | double d; |
| 2088 | int tok = match_token(dummynet_params, *av); |
| 2089 | ac--; av++; |
| 2090 | |
| 2091 | switch(tok) { |
| 2092 | case TOK_NOERROR: |
| 2093 | pipe.fs.flags_fs |= DN_NOERROR; |
| 2094 | break; |
| 2095 | |
| 2096 | case TOK_PLR: |
| 2097 | NEED1("plr needs argument 0..1\n"); |
| 2098 | d = strtod(av[0], NULL); |
| 2099 | if (d > 1) |
| 2100 | d = 1; |
| 2101 | else if (d < 0) |
| 2102 | d = 0; |
| 2103 | pipe.fs.plr = (int)(d*0x7fffffff); |
| 2104 | ac--; av++; |
| 2105 | break; |
| 2106 | |
| 2107 | case TOK_QUEUE: |
| 2108 | NEED1("queue needs queue size\n"); |
| 2109 | end = NULL; |
| 2110 | pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024); |
| 2111 | ac--; av++; |
| 2112 | break; |
| 2113 | |
| 2114 | case TOK_BUCKETS: |
| 2115 | NEED1("buckets needs argument\n"); |
| 2116 | pipe.fs.rq_size = strtoul(av[0], NULL, 0); |
| 2117 | ac--; av++; |
| 2118 | break; |
| 2119 | |
| 2120 | case TOK_MASK: |
| 2121 | NEED1("mask needs mask specifier\n"); |
| 2122 | /* |
| 2123 | * per-flow queue, mask is dst_ip, dst_port, |
| 2124 | * src_ip, src_port, proto measured in bits |
| 2125 | */ |
| 2126 | |
| 2127 | pipe.fs.flow_mask.type = ETHERTYPE_IP; |
| 2128 | pipe.fs.flow_mask.u.ip.dst_ip = 0; |
| 2129 | pipe.fs.flow_mask.u.ip.src_ip = 0; |
| 2130 | pipe.fs.flow_mask.u.ip.dst_port = 0; |
| 2131 | pipe.fs.flow_mask.u.ip.src_port = 0; |
| 2132 | pipe.fs.flow_mask.u.ip.proto = 0; |
| 2133 | end = NULL; |
| 2134 | |
| 2135 | while (ac >= 1) { |
| 2136 | u_int32_t *p32 = NULL; |
| 2137 | u_int16_t *p16 = NULL; |
| 2138 | |
| 2139 | tok = match_token(dummynet_params, *av); |
| 2140 | ac--; av++; |
| 2141 | switch(tok) { |
| 2142 | case TOK_ALL: |
| 2143 | /* |
| 2144 | * special case, all bits significant |
| 2145 | */ |
| 2146 | pipe.fs.flow_mask.u.ip.dst_ip = ~0; |
| 2147 | pipe.fs.flow_mask.u.ip.src_ip = ~0; |
| 2148 | pipe.fs.flow_mask.u.ip.dst_port = ~0; |
| 2149 | pipe.fs.flow_mask.u.ip.src_port = ~0; |
| 2150 | pipe.fs.flow_mask.u.ip.proto = ~0; |
| 2151 | pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; |
| 2152 | goto end_mask; |
| 2153 | |
| 2154 | case TOK_DSTIP: |
| 2155 | p32 = &pipe.fs.flow_mask.u.ip.dst_ip; |
| 2156 | break; |
| 2157 | |
| 2158 | case TOK_SRCIP: |
| 2159 | p32 = &pipe.fs.flow_mask.u.ip.src_ip; |
| 2160 | break; |
| 2161 | |
| 2162 | case TOK_DSTPORT: |
| 2163 | p16 = &pipe.fs.flow_mask.u.ip.dst_port; |
| 2164 | break; |
| 2165 | |
| 2166 | case TOK_SRCPORT: |
| 2167 | p16 = &pipe.fs.flow_mask.u.ip.src_port; |
| 2168 | break; |
| 2169 | |
| 2170 | case TOK_PROTO: |
| 2171 | break; |
| 2172 | |
| 2173 | default: |
| 2174 | ac++; av--; /* backtrack */ |
| 2175 | goto end_mask; |
| 2176 | } |
| 2177 | if (ac < 1) |
| 2178 | errx(EX_USAGE, "mask: value missing"); |
| 2179 | if (*av[0] == '/') { |
| 2180 | a = strtoul(av[0]+1, &end, 0); |
| 2181 | a = (a == 32) ? ~0 : (1 << a) - 1; |
| 2182 | } else |
| 2183 | a = strtoul(av[0], &end, 0); |
| 2184 | if (p32 != NULL) |
| 2185 | *p32 = a; |
| 2186 | else if (p16 != NULL) { |
| 2187 | if (a > 65535) |
| 2188 | errx(EX_DATAERR, |
| 2189 | "mask: must be 16 bit"); |
| 2190 | *p16 = (u_int16_t)a; |
| 2191 | } else { |
| 2192 | if (a > 255) |
| 2193 | errx(EX_DATAERR, |
| 2194 | "mask: must be 8 bit"); |
| 2195 | pipe.fs.flow_mask.u.ip.proto = (uint8_t)a; |
| 2196 | } |
| 2197 | if (a != 0) |
| 2198 | pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK; |
| 2199 | ac--; av++; |
| 2200 | } /* end while, config masks */ |
| 2201 | end_mask: |
| 2202 | break; |
| 2203 | |
| 2204 | case TOK_RED: |
| 2205 | case TOK_GRED: |
| 2206 | NEED1("red/gred needs w_q/min_th/max_th/max_p\n"); |
| 2207 | pipe.fs.flags_fs |= DN_IS_RED; |
| 2208 | if (tok == TOK_GRED) |
| 2209 | pipe.fs.flags_fs |= DN_IS_GENTLE_RED; |
| 2210 | /* |
| 2211 | * the format for parameters is w_q/min_th/max_th/max_p |
| 2212 | */ |
| 2213 | if ((end = strsep(&av[0], "/"))) { |
| 2214 | double w_q = strtod(end, NULL); |
| 2215 | if (w_q > 1 || w_q <= 0) |
| 2216 | errx(EX_DATAERR, "0 < w_q <= 1"); |
| 2217 | pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED)); |
| 2218 | } |
| 2219 | if ((end = strsep(&av[0], "/"))) { |
| 2220 | pipe.fs.min_th = strtoul(end, &end, 0); |
| 2221 | if (*end == 'K' || *end == 'k') |
| 2222 | pipe.fs.min_th *= 1024; |
| 2223 | } |
| 2224 | if ((end = strsep(&av[0], "/"))) { |
| 2225 | pipe.fs.max_th = strtoul(end, &end, 0); |
| 2226 | if (*end == 'K' || *end == 'k') |
| 2227 | pipe.fs.max_th *= 1024; |
| 2228 | } |
| 2229 | if ((end = strsep(&av[0], "/"))) { |
| 2230 | double max_p = strtod(end, NULL); |
| 2231 | if (max_p > 1 || max_p <= 0) |
| 2232 | errx(EX_DATAERR, "0 < max_p <= 1"); |
| 2233 | pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED)); |
| 2234 | } |
| 2235 | ac--; av++; |
| 2236 | break; |
| 2237 | |
| 2238 | case TOK_DROPTAIL: |
| 2239 | pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED); |
| 2240 | break; |
| 2241 | |
| 2242 | case TOK_BW: |
| 2243 | NEED1("bw needs bandwidth\n"); |
| 2244 | if (do_pipe != 1) |
| 2245 | errx(EX_DATAERR, "bandwidth only valid for pipes"); |
| 2246 | /* |
| 2247 | * set bandwidth value |
| 2248 | */ |
| 2249 | pipe.bandwidth = getbw(av[0], NULL, 1000); |
| 2250 | if (pipe.bandwidth < 0) |
| 2251 | errx(EX_DATAERR, "bandwidth too large"); |
| 2252 | ac--; av++; |
| 2253 | break; |
| 2254 | |
| 2255 | case TOK_DELAY: |
| 2256 | if (do_pipe != 1) |
| 2257 | errx(EX_DATAERR, "delay only valid for pipes"); |
| 2258 | NEED1("delay needs argument 0..10000ms\n"); |
| 2259 | pipe.delay = strtoul(av[0], NULL, 0); |
| 2260 | ac--; av++; |
| 2261 | break; |
| 2262 | |
| 2263 | case TOK_WEIGHT: |
| 2264 | if (do_pipe == 1) |
| 2265 | errx(EX_DATAERR,"weight only valid for queues"); |
| 2266 | NEED1("weight needs argument 0..100\n"); |
| 2267 | pipe.fs.weight = strtoul(av[0], &end, 0); |
| 2268 | ac--; av++; |
| 2269 | break; |
| 2270 | |
| 2271 | case TOK_PIPE: |
| 2272 | if (do_pipe == 1) |
| 2273 | errx(EX_DATAERR,"pipe only valid for queues"); |
| 2274 | NEED1("pipe needs pipe_number\n"); |
| 2275 | pipe.fs.parent_nr = strtoul(av[0], &end, 0); |
| 2276 | ac--; av++; |
| 2277 | break; |
| 2278 | |
| 2279 | default: |
| 2280 | errx(EX_DATAERR, "unrecognised option ``%s''", *av); |
| 2281 | } |
| 2282 | } |
| 2283 | if (do_pipe == 1) { |
| 2284 | if (pipe.pipe_nr == 0) |
| 2285 | errx(EX_DATAERR, "pipe_nr must be > 0"); |
| 2286 | if (pipe.delay > 10000) |
| 2287 | errx(EX_DATAERR, "delay must be < 10000"); |
| 2288 | } else { /* do_pipe == 2, queue */ |
| 2289 | if (pipe.fs.parent_nr == 0) |
| 2290 | errx(EX_DATAERR, "pipe must be > 0"); |
| 2291 | if (pipe.fs.weight >100) |
| 2292 | errx(EX_DATAERR, "weight must be <= 100"); |
| 2293 | } |
| 2294 | if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) { |
| 2295 | if (pipe.fs.qsize > 1024*1024) |
| 2296 | errx(EX_DATAERR, "queue size must be < 1MB"); |
| 2297 | } else { |
| 2298 | if (pipe.fs.qsize > 100) |
| 2299 | errx(EX_DATAERR, "2 <= queue size <= 100"); |
| 2300 | } |
| 2301 | if (pipe.fs.flags_fs & DN_IS_RED) { |
| 2302 | size_t len; |
| 2303 | int lookup_depth, avg_pkt_size; |
| 2304 | double step, idle, weight, w_q; |
| 2305 | int clock_hz; |
| 2306 | int t; |
| 2307 | |
| 2308 | if (pipe.fs.min_th >= pipe.fs.max_th) |
| 2309 | errx(EX_DATAERR, "min_th %d must be < than max_th %d", |
| 2310 | pipe.fs.min_th, pipe.fs.max_th); |
| 2311 | if (pipe.fs.max_th == 0) |
| 2312 | errx(EX_DATAERR, "max_th must be > 0"); |
| 2313 | |
| 2314 | len = sizeof(int); |
| 2315 | if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth", |
| 2316 | &lookup_depth, &len, NULL, 0) == -1) |
| 2317 | |
| 2318 | errx(1, "sysctlbyname(\"%s\")", |
| 2319 | "net.inet.ip.dummynet.red_lookup_depth"); |
| 2320 | if (lookup_depth == 0) |
| 2321 | errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth" |
| 2322 | " must be greater than zero"); |
| 2323 | |
| 2324 | len = sizeof(int); |
| 2325 | if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size", |
| 2326 | &avg_pkt_size, &len, NULL, 0) == -1) |
| 2327 | |
| 2328 | errx(1, "sysctlbyname(\"%s\")", |
| 2329 | "net.inet.ip.dummynet.red_avg_pkt_size"); |
| 2330 | if (avg_pkt_size == 0) |
| 2331 | errx(EX_DATAERR, |
| 2332 | "net.inet.ip.dummynet.red_avg_pkt_size must" |
| 2333 | " be greater than zero"); |
| 2334 | |
| 2335 | len = sizeof(clock_hz); |
| 2336 | if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len, |
| 2337 | NULL, 0) == -1) { |
| 2338 | errx(1, "sysctlbyname(\"%s\")", |
| 2339 | "net.inet.ip.dummynet.hz"); |
| 2340 | } |
| 2341 | |
| 2342 | /* |
| 2343 | * Ticks needed for sending a medium-sized packet. |
| 2344 | * Unfortunately, when we are configuring a WF2Q+ queue, we |
| 2345 | * do not have bandwidth information, because that is stored |
| 2346 | * in the parent pipe, and also we have multiple queues |
| 2347 | * competing for it. So we set step=0, which is not very |
| 2348 | * correct. But on the other hand, why do we want RED with |
| 2349 | * WF2Q+ ? |
| 2350 | */ |
| 2351 | if (pipe.bandwidth==0) /* this is a WF2Q+ queue */ |
| 2352 | step = 0; |
| 2353 | else |
| 2354 | step = clock_hz * avg_pkt_size * 8 / pipe.bandwidth; |
| 2355 | |
| 2356 | /* |
| 2357 | * max idle time (in ticks) before avg queue size becomes 0. |
| 2358 | * NOTA: (3/w_q) is approx the value x so that |
| 2359 | * (1-w_q)^x < 10^-3. |
| 2360 | */ |
| 2361 | w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED); |
| 2362 | idle = step * 3. / w_q; |
| 2363 | pipe.fs.lookup_step = (int)idle / lookup_depth; |
| 2364 | if (!pipe.fs.lookup_step) |
| 2365 | pipe.fs.lookup_step = 1; |
| 2366 | weight = 1 - w_q; |
| 2367 | for (t = pipe.fs.lookup_step; t > 0; --t) |
| 2368 | weight *= weight; |
| 2369 | pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED)); |
| 2370 | } |
| 2371 | i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe, |
| 2372 | sizeof pipe); |
| 2373 | if (i) |
| 2374 | err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE"); |
| 2375 | } |
| 2376 | |
| 2377 | static void |
| 2378 | get_mac_addr_mask(char *p, u_char *addr, u_char *mask) |
| 2379 | { |
| 2380 | int i, l; |
| 2381 | |
| 2382 | for (i=0; i<6; i++) |
| 2383 | addr[i] = mask[i] = 0; |
| 2384 | if (!strcmp(p, "any")) |
| 2385 | return; |
| 2386 | |
| 2387 | for (i=0; *p && i<6;i++, p++) { |
| 2388 | addr[i] = strtol(p, &p, 16); |
| 2389 | if (*p != ':') /* we start with the mask */ |
| 2390 | break; |
| 2391 | } |
| 2392 | if (*p == '/') { /* mask len */ |
| 2393 | l = strtol(p+1, &p, 0); |
| 2394 | for (i=0; l>0; l -=8, i++) |
| 2395 | mask[i] = (l >=8) ? 0xff : (~0) << (8-l); |
| 2396 | } else if (*p == '&') { /* mask */ |
| 2397 | for (i=0, p++; *p && i<6;i++, p++) { |
| 2398 | mask[i] = strtol(p, &p, 16); |
| 2399 | if (*p != ':') |
| 2400 | break; |
| 2401 | } |
| 2402 | } else if (*p == '\0') { |
| 2403 | for (i=0; i<6; i++) |
| 2404 | mask[i] = 0xff; |
| 2405 | } |
| 2406 | for (i=0; i<6; i++) |
| 2407 | addr[i] &= mask[i]; |
| 2408 | } |
| 2409 | |
| 2410 | /* |
| 2411 | * helper function, updates the pointer to cmd with the length |
| 2412 | * of the current command, and also cleans up the first word of |
| 2413 | * the new command in case it has been clobbered before. |
| 2414 | */ |
| 2415 | static ipfw_insn * |
| 2416 | next_cmd(ipfw_insn *cmd) |
| 2417 | { |
| 2418 | cmd += F_LEN(cmd); |
| 2419 | bzero(cmd, sizeof(*cmd)); |
| 2420 | return cmd; |
| 2421 | } |
| 2422 | |
| 2423 | /* |
| 2424 | * A function to fill simple commands of size 1. |
| 2425 | * Existing flags are preserved. |
| 2426 | */ |
| 2427 | static void |
| 2428 | fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg) |
| 2429 | { |
| 2430 | cmd->opcode = opcode; |
| 2431 | cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; |
| 2432 | cmd->arg1 = arg; |
| 2433 | } |
| 2434 | |
| 2435 | /* |
| 2436 | * Fetch and add the MAC address and type, with masks. This generates one or |
| 2437 | * two microinstructions, and returns the pointer to the last one. |
| 2438 | */ |
| 2439 | static ipfw_insn * |
| 2440 | add_mac(ipfw_insn *cmd, int ac, char *av[]) |
| 2441 | { |
| 2442 | ipfw_insn_mac *mac; |
| 2443 | |
| 2444 | if (ac < 2) |
| 2445 | errx(EX_DATAERR, "MAC dst src"); |
| 2446 | |
| 2447 | cmd->opcode = O_MACADDR2; |
| 2448 | cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); |
| 2449 | |
| 2450 | mac = (ipfw_insn_mac *)cmd; |
| 2451 | get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ |
| 2452 | get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */ |
| 2453 | return cmd; |
| 2454 | } |
| 2455 | |
| 2456 | static ipfw_insn * |
| 2457 | add_mactype(ipfw_insn *cmd, int ac, char *av) |
| 2458 | { |
| 2459 | if (ac < 1) |
| 2460 | errx(EX_DATAERR, "missing MAC type"); |
| 2461 | if (strcmp(av, "any") != 0) { /* we have a non-null type */ |
| 2462 | fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); |
| 2463 | cmd->opcode = O_MAC_TYPE; |
| 2464 | return cmd; |
| 2465 | } else |
| 2466 | return NULL; |
| 2467 | } |
| 2468 | |
| 2469 | static ipfw_insn * |
| 2470 | add_proto(ipfw_insn *cmd, char *av) |
| 2471 | { |
| 2472 | struct protoent *pe; |
| 2473 | u_char proto = 0; |
| 2474 | |
| 2475 | if (!strncmp(av, "all", strlen(av))) |
| 2476 | ; /* same as "ip" */ |
| 2477 | else if ((proto = atoi(av)) > 0) |
| 2478 | ; /* all done! */ |
| 2479 | else if ((pe = getprotobyname(av)) != NULL) |
| 2480 | proto = pe->p_proto; |
| 2481 | else |
| 2482 | return NULL; |
| 2483 | if (proto != IPPROTO_IP) |
| 2484 | fill_cmd(cmd, O_PROTO, 0, proto); |
| 2485 | return cmd; |
| 2486 | } |
| 2487 | |
| 2488 | static ipfw_insn * |
| 2489 | add_srcip(ipfw_insn *cmd, char *av) |
| 2490 | { |
| 2491 | fill_ip((ipfw_insn_ip *)cmd, av); |
| 2492 | if (cmd->opcode == O_IP_DST_SET) /* set */ |
| 2493 | cmd->opcode = O_IP_SRC_SET; |
| 2494 | else if (cmd->opcode == O_IP_DST_TABLE) /* table */ |
| 2495 | cmd->opcode = O_IP_SRC_TABLE; |
| 2496 | else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ |
| 2497 | cmd->opcode = O_IP_SRC_ME; |
| 2498 | else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ |
| 2499 | cmd->opcode = O_IP_SRC; |
| 2500 | else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ |
| 2501 | cmd->opcode = O_IP_SRC_MASK; |
| 2502 | return cmd; |
| 2503 | } |
| 2504 | |
| 2505 | static ipfw_insn * |
| 2506 | add_dstip(ipfw_insn *cmd, char *av) |
| 2507 | { |
| 2508 | fill_ip((ipfw_insn_ip *)cmd, av); |
| 2509 | if (cmd->opcode == O_IP_DST_SET) /* set */ |
| 2510 | ; |
| 2511 | else if (cmd->opcode == O_IP_DST_TABLE) /* table */ |
| 2512 | ; |
| 2513 | else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ |
| 2514 | cmd->opcode = O_IP_DST_ME; |
| 2515 | else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ |
| 2516 | cmd->opcode = O_IP_DST; |
| 2517 | else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */ |
| 2518 | cmd->opcode = O_IP_DST_MASK; |
| 2519 | return cmd; |
| 2520 | } |
| 2521 | |
| 2522 | static ipfw_insn * |
| 2523 | add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) |
| 2524 | { |
| 2525 | if (!strncmp(av, "any", strlen(av))) { |
| 2526 | return NULL; |
| 2527 | } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { |
| 2528 | /* XXX todo: check that we have a protocol with ports */ |
| 2529 | cmd->opcode = opcode; |
| 2530 | return cmd; |
| 2531 | } |
| 2532 | return NULL; |
| 2533 | } |
| 2534 | |
| 2535 | /* |
| 2536 | * Parse arguments and assemble the microinstructions which make up a rule. |
| 2537 | * Rules are added into the 'rulebuf' and then copied in the correct order |
| 2538 | * into the actual rule. |
| 2539 | * |
| 2540 | * The syntax for a rule starts with the action, followed by an |
| 2541 | * optional log action, and the various match patterns. |
| 2542 | * In the assembled microcode, the first opcode must be a O_PROBE_STATE |
| 2543 | * (generated if the rule includes a keep-state option), then the |
| 2544 | * various match patterns, the "log" action, and the actual action. |
| 2545 | * |
| 2546 | */ |
| 2547 | static void |
| 2548 | add(int ac, char *av[]) |
| 2549 | { |
| 2550 | /* |
| 2551 | * rules are added into the 'rulebuf' and then copied in |
| 2552 | * the correct order into the actual rule. |
| 2553 | * Some things that need to go out of order (prob, action etc.) |
| 2554 | * go into actbuf[]. |
| 2555 | */ |
| 2556 | static uint32_t rulebuf[IPFW_RULE_SIZE_MAX]; |
| 2557 | static uint32_t actbuf[IPFW_RULE_SIZE_MAX]; |
| 2558 | static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX]; |
| 2559 | |
| 2560 | ipfw_insn *src, *dst, *cmd, *action, *prev = NULL; |
| 2561 | ipfw_insn *first_cmd; /* first match pattern */ |
| 2562 | |
| 2563 | struct ipfw_ioc_rule *rule; |
| 2564 | |
| 2565 | /* |
| 2566 | * various flags used to record that we entered some fields. |
| 2567 | */ |
| 2568 | ipfw_insn *have_state = NULL; /* check-state or keep-state */ |
| 2569 | |
| 2570 | int i; |
| 2571 | |
| 2572 | int open_par = 0; /* open parenthesis ( */ |
| 2573 | |
| 2574 | /* proto is here because it is used to fetch ports */ |
| 2575 | u_char proto = IPPROTO_IP; /* default protocol */ |
| 2576 | |
| 2577 | double match_prob = 1; /* match probability, default is always match */ |
| 2578 | |
| 2579 | bzero(actbuf, sizeof(actbuf)); /* actions go here */ |
| 2580 | bzero(cmdbuf, sizeof(cmdbuf)); |
| 2581 | bzero(rulebuf, sizeof(rulebuf)); |
| 2582 | |
| 2583 | rule = (struct ipfw_ioc_rule *)rulebuf; |
| 2584 | cmd = (ipfw_insn *)cmdbuf; |
| 2585 | action = (ipfw_insn *)actbuf; |
| 2586 | |
| 2587 | av++; ac--; |
| 2588 | |
| 2589 | /* [rule N] -- Rule number optional */ |
| 2590 | if (ac && isdigit(**av)) { |
| 2591 | rule->rulenum = atoi(*av); |
| 2592 | av++; |
| 2593 | ac--; |
| 2594 | } |
| 2595 | |
| 2596 | /* [set N] -- set number (0..30), optional */ |
| 2597 | if (ac > 1 && !strncmp(*av, "set", strlen(*av))) { |
| 2598 | int set = strtoul(av[1], NULL, 10); |
| 2599 | if (set < 0 || set > 30) |
| 2600 | errx(EX_DATAERR, "illegal set %s", av[1]); |
| 2601 | rule->set = set; |
| 2602 | av += 2; ac -= 2; |
| 2603 | } |
| 2604 | |
| 2605 | /* [prob D] -- match probability, optional */ |
| 2606 | if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) { |
| 2607 | match_prob = strtod(av[1], NULL); |
| 2608 | |
| 2609 | if (match_prob <= 0 || match_prob > 1) |
| 2610 | errx(EX_DATAERR, "illegal match prob. %s", av[1]); |
| 2611 | av += 2; ac -= 2; |
| 2612 | } |
| 2613 | |
| 2614 | /* action -- mandatory */ |
| 2615 | NEED1("missing action"); |
| 2616 | i = match_token(rule_actions, *av); |
| 2617 | ac--; av++; |
| 2618 | action->len = 1; /* default */ |
| 2619 | switch(i) { |
| 2620 | case TOK_CHECKSTATE: |
| 2621 | have_state = action; |
| 2622 | action->opcode = O_CHECK_STATE; |
| 2623 | break; |
| 2624 | |
| 2625 | case TOK_ACCEPT: |
| 2626 | action->opcode = O_ACCEPT; |
| 2627 | break; |
| 2628 | |
| 2629 | case TOK_DEFRAG: |
| 2630 | action->opcode = O_DEFRAG; |
| 2631 | action->arg1 = 0; |
| 2632 | break; |
| 2633 | |
| 2634 | case TOK_DENY: |
| 2635 | action->opcode = O_DENY; |
| 2636 | action->arg1 = 0; |
| 2637 | break; |
| 2638 | |
| 2639 | case TOK_REJECT: |
| 2640 | action->opcode = O_REJECT; |
| 2641 | action->arg1 = ICMP_UNREACH_HOST; |
| 2642 | break; |
| 2643 | |
| 2644 | case TOK_RESET: |
| 2645 | action->opcode = O_REJECT; |
| 2646 | action->arg1 = ICMP_REJECT_RST; |
| 2647 | break; |
| 2648 | |
| 2649 | case TOK_UNREACH: |
| 2650 | action->opcode = O_REJECT; |
| 2651 | NEED1("missing reject code"); |
| 2652 | fill_reject_code(&action->arg1, *av); |
| 2653 | ac--; av++; |
| 2654 | break; |
| 2655 | |
| 2656 | case TOK_COUNT: |
| 2657 | action->opcode = O_COUNT; |
| 2658 | break; |
| 2659 | |
| 2660 | case TOK_QUEUE: |
| 2661 | case TOK_PIPE: |
| 2662 | action->len = F_INSN_SIZE(ipfw_insn_pipe); |
| 2663 | case TOK_SKIPTO: |
| 2664 | if (i == TOK_QUEUE) |
| 2665 | action->opcode = O_QUEUE; |
| 2666 | else if (i == TOK_PIPE) |
| 2667 | action->opcode = O_PIPE; |
| 2668 | else if (i == TOK_SKIPTO) |
| 2669 | action->opcode = O_SKIPTO; |
| 2670 | NEED1("missing skipto/pipe/queue number"); |
| 2671 | action->arg1 = strtoul(*av, NULL, 10); |
| 2672 | av++; ac--; |
| 2673 | break; |
| 2674 | |
| 2675 | case TOK_DIVERT: |
| 2676 | case TOK_TEE: |
| 2677 | action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE; |
| 2678 | NEED1("missing divert/tee port"); |
| 2679 | action->arg1 = strtoul(*av, NULL, 0); |
| 2680 | if (action->arg1 == 0) { |
| 2681 | struct servent *serv; |
| 2682 | setservent(1); |
| 2683 | serv = getservbyname(av[0], "divert"); |
| 2684 | if (serv != NULL) |
| 2685 | action->arg1 = ntohs(serv->s_port); |
| 2686 | else |
| 2687 | errx(EX_DATAERR, "illegal divert/tee port"); |
| 2688 | } |
| 2689 | ac--; av++; |
| 2690 | break; |
| 2691 | |
| 2692 | case TOK_FORWARD: { |
| 2693 | ipfw_insn_sa *p = (ipfw_insn_sa *)action; |
| 2694 | char *st, *end; |
| 2695 | |
| 2696 | NEED1("missing forward address[:port]"); |
| 2697 | |
| 2698 | action->opcode = O_FORWARD_IP; |
| 2699 | action->len = F_INSN_SIZE(ipfw_insn_sa); |
| 2700 | |
| 2701 | p->sa.sin_len = sizeof(struct sockaddr_in); |
| 2702 | p->sa.sin_family = AF_INET; |
| 2703 | p->sa.sin_port = 0; |
| 2704 | /* |
| 2705 | * locate the address-port separator (':' or ',') |
| 2706 | */ |
| 2707 | st = strchr(*av, ':'); |
| 2708 | if (st == NULL) |
| 2709 | st = strchr(*av, ','); |
| 2710 | if (st != NULL) { |
| 2711 | *(st++) = '\0'; |
| 2712 | i = strtoport(st, &end, 0 /* base */, 0 /* proto */); |
| 2713 | if (st == end) |
| 2714 | errx(EX_DATAERR, |
| 2715 | "illegal forwarding port ``%s''", st); |
| 2716 | p->sa.sin_port = (u_short)i; |
| 2717 | } |
| 2718 | lookup_host(*av, &(p->sa.sin_addr)); |
| 2719 | } |
| 2720 | ac--; av++; |
| 2721 | break; |
| 2722 | |
| 2723 | default: |
| 2724 | errx(EX_DATAERR, "invalid action %s\n", av[-1]); |
| 2725 | } |
| 2726 | action = next_cmd(action); |
| 2727 | |
| 2728 | /* |
| 2729 | * [log [logamount N]] -- log, optional |
| 2730 | * |
| 2731 | * If exists, it goes first in the cmdbuf, but then it is |
| 2732 | * skipped in the copy section to the end of the buffer. |
| 2733 | */ |
| 2734 | if (ac && !strncmp(*av, "log", strlen(*av))) { |
| 2735 | ipfw_insn_log *c = (ipfw_insn_log *)cmd; |
| 2736 | |
| 2737 | cmd->len = F_INSN_SIZE(ipfw_insn_log); |
| 2738 | cmd->opcode = O_LOG; |
| 2739 | av++; ac--; |
| 2740 | if (ac && !strncmp(*av, "logamount", strlen(*av))) { |
| 2741 | ac--; av++; |
| 2742 | NEED1("logamount requires argument"); |
| 2743 | c->max_log = atoi(*av); |
| 2744 | ac--; av++; |
| 2745 | } |
| 2746 | cmd = next_cmd(cmd); |
| 2747 | } |
| 2748 | |
| 2749 | if (have_state) /* must be a check-state, we are done */ |
| 2750 | goto done; |
| 2751 | |
| 2752 | #define OR_START(target) \ |
| 2753 | if (ac && (*av[0] == '(' || *av[0] == '{')) { \ |
| 2754 | if (open_par) \ |
| 2755 | errx(EX_USAGE, "nested \"(\" not allowed\n"); \ |
| 2756 | prev = NULL; \ |
| 2757 | open_par = 1; \ |
| 2758 | if ( (av[0])[1] == '\0') { \ |
| 2759 | ac--; av++; \ |
| 2760 | } else \ |
| 2761 | (*av)++; \ |
| 2762 | } \ |
| 2763 | target: \ |
| 2764 | |
| 2765 | |
| 2766 | #define CLOSE_PAR \ |
| 2767 | if (open_par) { \ |
| 2768 | if (ac && ( \ |
| 2769 | !strncmp(*av, ")", strlen(*av)) || \ |
| 2770 | !strncmp(*av, "}", strlen(*av)) )) { \ |
| 2771 | prev = NULL; \ |
| 2772 | open_par = 0; \ |
| 2773 | ac--; av++; \ |
| 2774 | } else \ |
| 2775 | errx(EX_USAGE, "missing \")\"\n"); \ |
| 2776 | } |
| 2777 | |
| 2778 | #define NOT_BLOCK \ |
| 2779 | if (ac && !strncmp(*av, "not", strlen(*av))) { \ |
| 2780 | if (cmd->len & F_NOT) \ |
| 2781 | errx(EX_USAGE, "double \"not\" not allowed\n"); \ |
| 2782 | cmd->len |= F_NOT; \ |
| 2783 | ac--; av++; \ |
| 2784 | } |
| 2785 | |
| 2786 | #define OR_BLOCK(target) \ |
| 2787 | if (ac && !strncmp(*av, "or", strlen(*av))) { \ |
| 2788 | if (prev == NULL || open_par == 0) \ |
| 2789 | errx(EX_DATAERR, "invalid OR block"); \ |
| 2790 | prev->len |= F_OR; \ |
| 2791 | ac--; av++; \ |
| 2792 | goto target; \ |
| 2793 | } \ |
| 2794 | CLOSE_PAR; |
| 2795 | |
| 2796 | first_cmd = cmd; |
| 2797 | |
| 2798 | #if 0 |
| 2799 | /* |
| 2800 | * MAC addresses, optional. |
| 2801 | * If we have this, we skip the part "proto from src to dst" |
| 2802 | * and jump straight to the option parsing. |
| 2803 | */ |
| 2804 | NOT_BLOCK; |
| 2805 | NEED1("missing protocol"); |
| 2806 | if (!strncmp(*av, "MAC", strlen(*av)) || |
| 2807 | !strncmp(*av, "mac", strlen(*av))) { |
| 2808 | ac--; av++; /* the "MAC" keyword */ |
| 2809 | add_mac(cmd, ac, av); /* exits in case of errors */ |
| 2810 | cmd = next_cmd(cmd); |
| 2811 | ac -= 2; av += 2; /* dst-mac and src-mac */ |
| 2812 | NOT_BLOCK; |
| 2813 | NEED1("missing mac type"); |
| 2814 | if (add_mactype(cmd, ac, av[0])) |
| 2815 | cmd = next_cmd(cmd); |
| 2816 | ac--; av++; /* any or mac-type */ |
| 2817 | goto read_options; |
| 2818 | } |
| 2819 | #endif |
| 2820 | |
| 2821 | /* |
| 2822 | * protocol, mandatory |
| 2823 | */ |
| 2824 | OR_START(get_proto); |
| 2825 | NOT_BLOCK; |
| 2826 | NEED1("missing protocol"); |
| 2827 | if (add_proto(cmd, *av)) { |
| 2828 | av++; ac--; |
| 2829 | if (F_LEN(cmd) == 0) /* plain IP */ |
| 2830 | proto = 0; |
| 2831 | else { |
| 2832 | proto = cmd->arg1; |
| 2833 | prev = cmd; |
| 2834 | cmd = next_cmd(cmd); |
| 2835 | } |
| 2836 | } else if (first_cmd != cmd) { |
| 2837 | errx(EX_DATAERR, "invalid protocol ``%s''", *av); |
| 2838 | } else |
| 2839 | goto read_options; |
| 2840 | OR_BLOCK(get_proto); |
| 2841 | |
| 2842 | /* |
| 2843 | * "from", mandatory |
| 2844 | */ |
| 2845 | if (!ac || strncmp(*av, "from", strlen(*av))) |
| 2846 | errx(EX_USAGE, "missing ``from''"); |
| 2847 | ac--; av++; |
| 2848 | |
| 2849 | /* |
| 2850 | * source IP, mandatory |
| 2851 | */ |
| 2852 | OR_START(source_ip); |
| 2853 | NOT_BLOCK; /* optional "not" */ |
| 2854 | NEED1("missing source address"); |
| 2855 | if (add_srcip(cmd, *av)) { |
| 2856 | ac--; av++; |
| 2857 | if (F_LEN(cmd) != 0) { /* ! any */ |
| 2858 | prev = cmd; |
| 2859 | cmd = next_cmd(cmd); |
| 2860 | } |
| 2861 | } |
| 2862 | OR_BLOCK(source_ip); |
| 2863 | |
| 2864 | /* |
| 2865 | * source ports, optional |
| 2866 | */ |
| 2867 | NOT_BLOCK; /* optional "not" */ |
| 2868 | if (ac) { |
| 2869 | if (!strncmp(*av, "any", strlen(*av)) || |
| 2870 | add_ports(cmd, *av, proto, O_IP_SRCPORT)) { |
| 2871 | ac--; av++; |
| 2872 | if (F_LEN(cmd) != 0) |
| 2873 | cmd = next_cmd(cmd); |
| 2874 | } |
| 2875 | } |
| 2876 | |
| 2877 | /* |
| 2878 | * "to", mandatory |
| 2879 | */ |
| 2880 | if (!ac || strncmp(*av, "to", strlen(*av))) |
| 2881 | errx(EX_USAGE, "missing ``to''"); |
| 2882 | av++; ac--; |
| 2883 | |
| 2884 | /* |
| 2885 | * destination, mandatory |
| 2886 | */ |
| 2887 | OR_START(dest_ip); |
| 2888 | NOT_BLOCK; /* optional "not" */ |
| 2889 | NEED1("missing dst address"); |
| 2890 | if (add_dstip(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(dest_ip); |
| 2898 | |
| 2899 | /* |
| 2900 | * dest. 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_DSTPORT)) { |
| 2906 | ac--; av++; |
| 2907 | if (F_LEN(cmd) != 0) |
| 2908 | cmd = next_cmd(cmd); |
| 2909 | } |
| 2910 | } |
| 2911 | |
| 2912 | read_options: |
| 2913 | if (ac && first_cmd == cmd) { |
| 2914 | /* |
| 2915 | * nothing specified so far, store in the rule to ease |
| 2916 | * printout later. |
| 2917 | */ |
| 2918 | rule->usr_flags = IPFW_USR_F_NORULE; |
| 2919 | } |
| 2920 | prev = NULL; |
| 2921 | while (ac) { |
| 2922 | char *s1; |
| 2923 | ipfw_insn_u32 *cmd32; /* alias for cmd */ |
| 2924 | |
| 2925 | s1 = *av; |
| 2926 | cmd32 = (ipfw_insn_u32 *)cmd; |
| 2927 | |
| 2928 | if (*s1 == '!') { /* alternate syntax for NOT */ |
| 2929 | if (cmd->len & F_NOT) |
| 2930 | errx(EX_USAGE, "double \"not\" not allowed\n"); |
| 2931 | cmd->len = F_NOT; |
| 2932 | s1++; |
| 2933 | } |
| 2934 | i = match_token(rule_options, s1); |
| 2935 | ac--; av++; |
| 2936 | switch(i) { |
| 2937 | case TOK_NOT: |
| 2938 | if (cmd->len & F_NOT) |
| 2939 | errx(EX_USAGE, "double \"not\" not allowed\n"); |
| 2940 | cmd->len = F_NOT; |
| 2941 | break; |
| 2942 | |
| 2943 | case TOK_OR: |
| 2944 | if (open_par == 0 || prev == NULL) |
| 2945 | errx(EX_USAGE, "invalid \"or\" block\n"); |
| 2946 | prev->len |= F_OR; |
| 2947 | break; |
| 2948 | |
| 2949 | case TOK_STARTBRACE: |
| 2950 | if (open_par) |
| 2951 | errx(EX_USAGE, "+nested \"(\" not allowed\n"); |
| 2952 | open_par = 1; |
| 2953 | break; |
| 2954 | |
| 2955 | case TOK_ENDBRACE: |
| 2956 | if (!open_par) |
| 2957 | errx(EX_USAGE, "+missing \")\"\n"); |
| 2958 | open_par = 0; |
| 2959 | prev = NULL; |
| 2960 | break; |
| 2961 | |
| 2962 | case TOK_IN: |
| 2963 | fill_cmd(cmd, O_IN, 0, 0); |
| 2964 | break; |
| 2965 | |
| 2966 | case TOK_OUT: |
| 2967 | cmd->len ^= F_NOT; /* toggle F_NOT */ |
| 2968 | fill_cmd(cmd, O_IN, 0, 0); |
| 2969 | break; |
| 2970 | |
| 2971 | case TOK_FRAG: |
| 2972 | fill_cmd(cmd, O_FRAG, 0, 0); |
| 2973 | break; |
| 2974 | |
| 2975 | case TOK_IPFRAG: |
| 2976 | fill_cmd(cmd, O_IPFRAG, 0, 0); |
| 2977 | break; |
| 2978 | |
| 2979 | case TOK_LAYER2: |
| 2980 | fill_cmd(cmd, O_LAYER2, 0, 0); |
| 2981 | break; |
| 2982 | |
| 2983 | case TOK_XMIT: |
| 2984 | case TOK_RECV: |
| 2985 | case TOK_VIA: |
| 2986 | NEED1("recv, xmit, via require interface name" |
| 2987 | " or address"); |
| 2988 | fill_iface((ipfw_insn_if *)cmd, av[0]); |
| 2989 | ac--; av++; |
| 2990 | if (F_LEN(cmd) == 0) /* not a valid address */ |
| 2991 | break; |
| 2992 | if (i == TOK_XMIT) |
| 2993 | cmd->opcode = O_XMIT; |
| 2994 | else if (i == TOK_RECV) |
| 2995 | cmd->opcode = O_RECV; |
| 2996 | else if (i == TOK_VIA) |
| 2997 | cmd->opcode = O_VIA; |
| 2998 | break; |
| 2999 | |
| 3000 | case TOK_ICMPTYPES: |
| 3001 | NEED1("icmptypes requires list of types"); |
| 3002 | fill_icmptypes((ipfw_insn_u32 *)cmd, *av); |
| 3003 | av++; ac--; |
| 3004 | break; |
| 3005 | |
| 3006 | case TOK_IPTTL: |
| 3007 | NEED1("ipttl requires TTL"); |
| 3008 | fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); |
| 3009 | ac--; av++; |
| 3010 | break; |
| 3011 | |
| 3012 | case TOK_IPID: |
| 3013 | NEED1("ipid requires length"); |
| 3014 | fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); |
| 3015 | ac--; av++; |
| 3016 | break; |
| 3017 | |
| 3018 | case TOK_IPLEN: |
| 3019 | NEED1("iplen requires length"); |
| 3020 | fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); |
| 3021 | ac--; av++; |
| 3022 | break; |
| 3023 | |
| 3024 | case TOK_IPVER: |
| 3025 | NEED1("ipver requires version"); |
| 3026 | fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); |
| 3027 | ac--; av++; |
| 3028 | break; |
| 3029 | |
| 3030 | case TOK_IPPRECEDENCE: |
| 3031 | NEED1("ipprecedence requires value"); |
| 3032 | fill_cmd(cmd, O_IPPRECEDENCE, 0, |
| 3033 | (strtoul(*av, NULL, 0) & 7) << 5); |
| 3034 | ac--; av++; |
| 3035 | break; |
| 3036 | |
| 3037 | case TOK_IPOPTS: |
| 3038 | NEED1("missing argument for ipoptions"); |
| 3039 | fill_flags(cmd, O_IPOPT, f_ipopts, *av); |
| 3040 | ac--; av++; |
| 3041 | break; |
| 3042 | |
| 3043 | case TOK_IPTOS: |
| 3044 | NEED1("missing argument for iptos"); |
| 3045 | fill_flags(cmd, O_IPTOS, f_iptos, *av); |
| 3046 | ac--; av++; |
| 3047 | break; |
| 3048 | |
| 3049 | case TOK_UID: |
| 3050 | NEED1("uid requires argument"); |
| 3051 | { |
| 3052 | char *end; |
| 3053 | uid_t uid; |
| 3054 | struct passwd *pwd; |
| 3055 | |
| 3056 | cmd->opcode = O_UID; |
| 3057 | uid = strtoul(*av, &end, 0); |
| 3058 | pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); |
| 3059 | if (pwd == NULL) |
| 3060 | errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); |
| 3061 | cmd32->d[0] = pwd->pw_uid; |
| 3062 | cmd->len = F_INSN_SIZE(ipfw_insn_u32); |
| 3063 | ac--; av++; |
| 3064 | } |
| 3065 | break; |
| 3066 | |
| 3067 | case TOK_GID: |
| 3068 | NEED1("gid requires argument"); |
| 3069 | { |
| 3070 | char *end; |
| 3071 | gid_t gid; |
| 3072 | struct group *grp; |
| 3073 | |
| 3074 | cmd->opcode = O_GID; |
| 3075 | gid = strtoul(*av, &end, 0); |
| 3076 | grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); |
| 3077 | if (grp == NULL) |
| 3078 | errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); |
| 3079 | cmd32->d[0] = grp->gr_gid; |
| 3080 | cmd->len = F_INSN_SIZE(ipfw_insn_u32); |
| 3081 | ac--; av++; |
| 3082 | } |
| 3083 | break; |
| 3084 | |
| 3085 | case TOK_ESTAB: |
| 3086 | fill_cmd(cmd, O_ESTAB, 0, 0); |
| 3087 | break; |
| 3088 | |
| 3089 | case TOK_SETUP: |
| 3090 | fill_cmd(cmd, O_TCPFLAGS, 0, |
| 3091 | (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); |
| 3092 | break; |
| 3093 | |
| 3094 | case TOK_TCPOPTS: |
| 3095 | NEED1("missing argument for tcpoptions"); |
| 3096 | fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); |
| 3097 | ac--; av++; |
| 3098 | break; |
| 3099 | |
| 3100 | case TOK_TCPSEQ: |
| 3101 | case TOK_TCPACK: |
| 3102 | NEED1("tcpseq/tcpack requires argument"); |
| 3103 | cmd->len = F_INSN_SIZE(ipfw_insn_u32); |
| 3104 | cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; |
| 3105 | cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); |
| 3106 | ac--; av++; |
| 3107 | break; |
| 3108 | |
| 3109 | case TOK_TCPWIN: |
| 3110 | NEED1("tcpwin requires length"); |
| 3111 | fill_cmd(cmd, O_TCPWIN, 0, |
| 3112 | htons(strtoul(*av, NULL, 0))); |
| 3113 | ac--; av++; |
| 3114 | break; |
| 3115 | |
| 3116 | case TOK_TCPFLAGS: |
| 3117 | NEED1("missing argument for tcpflags"); |
| 3118 | cmd->opcode = O_TCPFLAGS; |
| 3119 | fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); |
| 3120 | ac--; av++; |
| 3121 | break; |
| 3122 | |
| 3123 | case TOK_KEEPSTATE: |
| 3124 | if (open_par) |
| 3125 | errx(EX_USAGE, "keep-state cannot be part " |
| 3126 | "of an or block"); |
| 3127 | if (have_state) |
| 3128 | errx(EX_USAGE, "only one of keep-state " |
| 3129 | "and limit is allowed"); |
| 3130 | have_state = cmd; |
| 3131 | fill_cmd(cmd, O_KEEP_STATE, 0, 0); |
| 3132 | break; |
| 3133 | |
| 3134 | case TOK_LIMIT: |
| 3135 | if (open_par) |
| 3136 | errx(EX_USAGE, "limit cannot be part " |
| 3137 | "of an or block"); |
| 3138 | if (have_state) |
| 3139 | errx(EX_USAGE, "only one of keep-state " |
| 3140 | "and limit is allowed"); |
| 3141 | NEED1("limit needs mask and # of connections"); |
| 3142 | have_state = cmd; |
| 3143 | { |
| 3144 | ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; |
| 3145 | |
| 3146 | cmd->len = F_INSN_SIZE(ipfw_insn_limit); |
| 3147 | cmd->opcode = O_LIMIT; |
| 3148 | c->limit_mask = 0; |
| 3149 | c->conn_limit = 0; |
| 3150 | for (; ac >1 ;) { |
| 3151 | int val; |
| 3152 | |
| 3153 | val = match_token(limit_masks, *av); |
| 3154 | if (val <= 0) |
| 3155 | break; |
| 3156 | c->limit_mask |= val; |
| 3157 | ac--; av++; |
| 3158 | } |
| 3159 | c->conn_limit = atoi(*av); |
| 3160 | if (c->conn_limit == 0) |
| 3161 | errx(EX_USAGE, "limit: limit must be >0"); |
| 3162 | if (c->limit_mask == 0) |
| 3163 | errx(EX_USAGE, "missing limit mask"); |
| 3164 | ac--; av++; |
| 3165 | } |
| 3166 | break; |
| 3167 | |
| 3168 | case TOK_PROTO: |
| 3169 | NEED1("missing protocol"); |
| 3170 | if (add_proto(cmd, *av)) { |
| 3171 | proto = cmd->arg1; |
| 3172 | ac--; av++; |
| 3173 | } else |
| 3174 | errx(EX_DATAERR, "invalid protocol ``%s''", *av); |
| 3175 | break; |
| 3176 | |
| 3177 | case TOK_SRCIP: |
| 3178 | NEED1("missing source IP"); |
| 3179 | if (add_srcip(cmd, *av)) { |
| 3180 | ac--; av++; |
| 3181 | } |
| 3182 | break; |
| 3183 | |
| 3184 | case TOK_DSTIP: |
| 3185 | NEED1("missing destination IP"); |
| 3186 | if (add_dstip(cmd, *av)) { |
| 3187 | ac--; av++; |
| 3188 | } |
| 3189 | break; |
| 3190 | |
| 3191 | case TOK_SRCPORT: |
| 3192 | NEED1("missing source port"); |
| 3193 | if (!strncmp(*av, "any", strlen(*av)) || |
| 3194 | add_ports(cmd, *av, proto, O_IP_SRCPORT)) { |
| 3195 | ac--; av++; |
| 3196 | } else |
| 3197 | errx(EX_DATAERR, "invalid source port %s", *av); |
| 3198 | break; |
| 3199 | |
| 3200 | case TOK_DSTPORT: |
| 3201 | NEED1("missing destination port"); |
| 3202 | if (!strncmp(*av, "any", strlen(*av)) || |
| 3203 | add_ports(cmd, *av, proto, O_IP_DSTPORT)) { |
| 3204 | ac--; av++; |
| 3205 | } else |
| 3206 | errx(EX_DATAERR, "invalid destination port %s", |
| 3207 | *av); |
| 3208 | break; |
| 3209 | |
| 3210 | case TOK_MAC: |
| 3211 | if (ac < 2) |
| 3212 | errx(EX_USAGE, "MAC dst-mac src-mac"); |
| 3213 | if (add_mac(cmd, ac, av)) { |
| 3214 | ac -= 2; av += 2; |
| 3215 | } |
| 3216 | break; |
| 3217 | |
| 3218 | case TOK_MACTYPE: |
| 3219 | NEED1("missing mac type"); |
| 3220 | if (!add_mactype(cmd, ac, *av)) |
| 3221 | errx(EX_DATAERR, "invalid mac type %s", *av); |
| 3222 | ac--; av++; |
| 3223 | break; |
| 3224 | |
| 3225 | default: |
| 3226 | errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s1); |
| 3227 | } |
| 3228 | if (F_LEN(cmd) > 0) { /* prepare to advance */ |
| 3229 | prev = cmd; |
| 3230 | cmd = next_cmd(cmd); |
| 3231 | } |
| 3232 | } |
| 3233 | |
| 3234 | done: |
| 3235 | /* |
| 3236 | * Now copy stuff into the rule. |
| 3237 | * If we have a keep-state option, the first instruction |
| 3238 | * must be a PROBE_STATE (which is generated here). |
| 3239 | * If we have a LOG option, it was stored as the first command, |
| 3240 | * and now must be moved to the top of the action part. |
| 3241 | */ |
| 3242 | dst = (ipfw_insn *)rule->cmd; |
| 3243 | |
| 3244 | /* |
| 3245 | * First thing to write into the command stream is the match probability. |
| 3246 | */ |
| 3247 | if (match_prob != 1) { /* 1 means always match */ |
| 3248 | dst->opcode = O_PROB; |
| 3249 | dst->len = 2; |
| 3250 | *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); |
| 3251 | dst += dst->len; |
| 3252 | } |
| 3253 | |
| 3254 | /* |
| 3255 | * generate O_PROBE_STATE if necessary |
| 3256 | */ |
| 3257 | if (have_state && have_state->opcode != O_CHECK_STATE) { |
| 3258 | fill_cmd(dst, O_PROBE_STATE, 0, 0); |
| 3259 | dst = next_cmd(dst); |
| 3260 | } |
| 3261 | /* |
| 3262 | * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT |
| 3263 | */ |
| 3264 | for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { |
| 3265 | i = F_LEN(src); |
| 3266 | |
| 3267 | switch (src->opcode) { |
| 3268 | case O_LOG: |
| 3269 | case O_KEEP_STATE: |
| 3270 | case O_LIMIT: |
| 3271 | break; |
| 3272 | default: |
| 3273 | bcopy(src, dst, i * sizeof(u_int32_t)); |
| 3274 | dst += i; |
| 3275 | } |
| 3276 | } |
| 3277 | |
| 3278 | /* |
| 3279 | * put back the have_state command as last opcode |
| 3280 | */ |
| 3281 | if (have_state && have_state->opcode != O_CHECK_STATE) { |
| 3282 | i = F_LEN(have_state); |
| 3283 | bcopy(have_state, dst, i * sizeof(u_int32_t)); |
| 3284 | dst += i; |
| 3285 | } |
| 3286 | /* |
| 3287 | * start action section |
| 3288 | */ |
| 3289 | rule->act_ofs = dst - rule->cmd; |
| 3290 | |
| 3291 | /* |
| 3292 | * put back O_LOG if necessary |
| 3293 | */ |
| 3294 | src = (ipfw_insn *)cmdbuf; |
| 3295 | if ( src->opcode == O_LOG ) { |
| 3296 | i = F_LEN(src); |
| 3297 | bcopy(src, dst, i * sizeof(u_int32_t)); |
| 3298 | dst += i; |
| 3299 | } |
| 3300 | /* |
| 3301 | * copy all other actions |
| 3302 | */ |
| 3303 | for (src = (ipfw_insn *)actbuf; src != action; src += i) { |
| 3304 | i = F_LEN(src); |
| 3305 | bcopy(src, dst, i * sizeof(u_int32_t)); |
| 3306 | dst += i; |
| 3307 | } |
| 3308 | |
| 3309 | rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd); |
| 3310 | i = (uint8_t *)dst - (uint8_t *)rule; |
| 3311 | if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1) |
| 3312 | err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); |
| 3313 | if (!do_quiet) |
| 3314 | show_ipfw(rule, 10, 10); |
| 3315 | } |
| 3316 | |
| 3317 | static void |
| 3318 | zero(int ac, char *av[]) |
| 3319 | { |
| 3320 | int rulenum; |
| 3321 | int failed = EX_OK; |
| 3322 | |
| 3323 | av++; ac--; |
| 3324 | |
| 3325 | if (!ac) { |
| 3326 | /* clear all entries */ |
| 3327 | if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0) |
| 3328 | err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO"); |
| 3329 | if (!do_quiet) |
| 3330 | printf("Accounting cleared.\n"); |
| 3331 | |
| 3332 | return; |
| 3333 | } |
| 3334 | |
| 3335 | while (ac) { |
| 3336 | /* Rule number */ |
| 3337 | if (isdigit(**av)) { |
| 3338 | rulenum = atoi(*av); |
| 3339 | av++; |
| 3340 | ac--; |
| 3341 | if (setsockopt(s, IPPROTO_IP, |
| 3342 | IP_FW_ZERO, &rulenum, sizeof rulenum)) { |
| 3343 | warn("rule %u: setsockopt(IP_FW_ZERO)", |
| 3344 | rulenum); |
| 3345 | failed = EX_UNAVAILABLE; |
| 3346 | } else if (!do_quiet) |
| 3347 | printf("Entry %d cleared\n", rulenum); |
| 3348 | } else { |
| 3349 | errx(EX_USAGE, "invalid rule number ``%s''", *av); |
| 3350 | } |
| 3351 | } |
| 3352 | if (failed != EX_OK) |
| 3353 | exit(failed); |
| 3354 | } |
| 3355 | |
| 3356 | static void |
| 3357 | resetlog(int ac, char *av[]) |
| 3358 | { |
| 3359 | int rulenum; |
| 3360 | int failed = EX_OK; |
| 3361 | |
| 3362 | av++; ac--; |
| 3363 | |
| 3364 | if (!ac) { |
| 3365 | /* clear all entries */ |
| 3366 | if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0) |
| 3367 | err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)"); |
| 3368 | if (!do_quiet) |
| 3369 | printf("Logging counts reset.\n"); |
| 3370 | |
| 3371 | return; |
| 3372 | } |
| 3373 | |
| 3374 | while (ac) { |
| 3375 | /* Rule number */ |
| 3376 | if (isdigit(**av)) { |
| 3377 | rulenum = atoi(*av); |
| 3378 | av++; |
| 3379 | ac--; |
| 3380 | if (setsockopt(s, IPPROTO_IP, |
| 3381 | IP_FW_RESETLOG, &rulenum, sizeof rulenum)) { |
| 3382 | warn("rule %u: setsockopt(IP_FW_RESETLOG)", |
| 3383 | rulenum); |
| 3384 | failed = EX_UNAVAILABLE; |
| 3385 | } else if (!do_quiet) |
| 3386 | printf("Entry %d logging count reset\n", |
| 3387 | rulenum); |
| 3388 | } else { |
| 3389 | errx(EX_DATAERR, "invalid rule number ``%s''", *av); |
| 3390 | } |
| 3391 | } |
| 3392 | if (failed != EX_OK) |
| 3393 | exit(failed); |
| 3394 | } |
| 3395 | |
| 3396 | static void |
| 3397 | flush(void) |
| 3398 | { |
| 3399 | int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; |
| 3400 | |
| 3401 | if (!do_force && !do_quiet) { /* need to ask user */ |
| 3402 | int c; |
| 3403 | |
| 3404 | printf("Are you sure? [yn] "); |
| 3405 | fflush(stdout); |
| 3406 | do { |
| 3407 | c = toupper(getc(stdin)); |
| 3408 | while (c != '\n' && getc(stdin) != '\n') |
| 3409 | if (feof(stdin)) |
| 3410 | return; /* and do not flush */ |
| 3411 | } while (c != 'Y' && c != 'N'); |
| 3412 | printf("\n"); |
| 3413 | if (c == 'N') /* user said no */ |
| 3414 | return; |
| 3415 | } |
| 3416 | if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0) |
| 3417 | err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", |
| 3418 | do_pipe ? "DUMMYNET" : "FW"); |
| 3419 | if (!do_quiet) |
| 3420 | printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules"); |
| 3421 | } |
| 3422 | |
| 3423 | static void |
| 3424 | table_create(int ac, char **av) |
| 3425 | { |
| 3426 | struct ipfw_ioc_table tbl; |
| 3427 | char *eptr; |
| 3428 | |
| 3429 | ac--; |
| 3430 | av++; |
| 3431 | |
| 3432 | if (ac == 0) |
| 3433 | errx(EX_DATAERR, "missing table id"); |
| 3434 | |
| 3435 | memset(&tbl, 0, sizeof(tbl)); |
| 3436 | tbl.tableid = strtoul(*av, &eptr, 0); |
| 3437 | if (*eptr != '\0') |
| 3438 | errx(EX_DATAERR, "invalid table id %s", *av); |
| 3439 | if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_CREATE, &tbl, sizeof(tbl)) < 0) |
| 3440 | err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_CREATE)"); |
| 3441 | if (!do_quiet) |
| 3442 | printf("Created table %d\n", tbl.tableid); |
| 3443 | } |
| 3444 | |
| 3445 | static void |
| 3446 | table_flush(int ac, char **av, int opt) |
| 3447 | { |
| 3448 | struct ipfw_ioc_table tbl; |
| 3449 | char *eptr; |
| 3450 | |
| 3451 | ac--; |
| 3452 | av++; |
| 3453 | |
| 3454 | memset(&tbl, 0, sizeof(tbl)); |
| 3455 | |
| 3456 | if (ac == 0) { |
| 3457 | if (opt == IP_FW_TBL_FLUSH) { |
| 3458 | /* Flush all tables */ |
| 3459 | tbl.tableid = -1; |
| 3460 | goto flush; |
| 3461 | } |
| 3462 | errx(EX_DATAERR, "missing table id"); |
| 3463 | } |
| 3464 | |
| 3465 | tbl.tableid = strtoul(*av, &eptr, 0); |
| 3466 | if (*eptr != '\0') |
| 3467 | errx(EX_DATAERR, "invalid table id %s", *av); |
| 3468 | |
| 3469 | flush: |
| 3470 | if (!do_force && !do_quiet) { /* need to ask user */ |
| 3471 | int c; |
| 3472 | |
| 3473 | printf("Are you sure? [yn] "); |
| 3474 | fflush(stdout); |
| 3475 | do { |
| 3476 | c = toupper(getc(stdin)); |
| 3477 | while (c != '\n' && getc(stdin) != '\n') |
| 3478 | if (feof(stdin)) |
| 3479 | return; /* and do not flush */ |
| 3480 | } while (c != 'Y' && c != 'N'); |
| 3481 | printf("\n"); |
| 3482 | if (c == 'N') /* user said no */ |
| 3483 | return; |
| 3484 | } |
| 3485 | |
| 3486 | if (setsockopt(s, IPPROTO_IP, opt, &tbl, sizeof(tbl)) < 0) { |
| 3487 | err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)", |
| 3488 | opt == IP_FW_TBL_FLUSH ? "FLUSH" : "DESTROY"); |
| 3489 | } |
| 3490 | if (!do_quiet) { |
| 3491 | if (tbl.tableid >= 0) { |
| 3492 | printf("%sed table %d\n", |
| 3493 | opt == IP_FW_TBL_FLUSH ? "Flush" : "Destroy", |
| 3494 | tbl.tableid); |
| 3495 | } else { |
| 3496 | printf("Flushed all tables\n"); |
| 3497 | } |
| 3498 | } |
| 3499 | } |
| 3500 | |
| 3501 | static void |
| 3502 | table_list(void) |
| 3503 | { |
| 3504 | struct ipfw_ioc_tbllist *list; |
| 3505 | int table_max, i; |
| 3506 | size_t len; |
| 3507 | socklen_t len1; |
| 3508 | |
| 3509 | len = sizeof(table_max); |
| 3510 | if (sysctlbyname("net.inet.ip.fw.table_max", &table_max, &len, |
| 3511 | NULL, 0) < 0) |
| 3512 | err(EX_UNAVAILABLE, "sysctl net.inet.ip.fw.table_max failed"); |
| 3513 | |
| 3514 | len1 = __offsetof(struct ipfw_ioc_tbllist, tables[table_max]); |
| 3515 | list = malloc(len1); |
| 3516 | list->tableid = -1; |
| 3517 | |
| 3518 | if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, list, &len1) < 0) |
| 3519 | err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)"); |
| 3520 | |
| 3521 | for (i = 0; i < list->tablecnt; ++i) |
| 3522 | printf("%u\n", list->tables[i]); |
| 3523 | } |
| 3524 | |
| 3525 | /* XXX copied from route(8) */ |
| 3526 | static void |
| 3527 | inet_makenetandmask(in_addr_t net, struct sockaddr_in *in, |
| 3528 | struct sockaddr_in *in_mask, int bits) |
| 3529 | { |
| 3530 | in_addr_t addr, mask = 0; |
| 3531 | char *cp; |
| 3532 | |
| 3533 | /* |
| 3534 | * XXX: This approach unable to handle 0.0.0.1/32 correctly |
| 3535 | * as inet_network() converts 0.0.0.1 and 1 equally. |
| 3536 | */ |
| 3537 | if (net <= 0xff) |
| 3538 | addr = net << IN_CLASSA_NSHIFT; |
| 3539 | else if (net <= 0xffff) |
| 3540 | addr = net << IN_CLASSB_NSHIFT; |
| 3541 | else if (net <= 0xffffff) |
| 3542 | addr = net << IN_CLASSC_NSHIFT; |
| 3543 | else |
| 3544 | addr = net; |
| 3545 | |
| 3546 | if (bits != 0) |
| 3547 | mask = 0xffffffff << (32 - bits); |
| 3548 | else if (net == 0) |
| 3549 | mask = 0; |
| 3550 | else if (IN_CLASSA(addr)) |
| 3551 | mask = IN_CLASSA_NET; |
| 3552 | else if (IN_CLASSB(addr)) |
| 3553 | mask = IN_CLASSB_NET; |
| 3554 | else if (IN_CLASSC(addr)) |
| 3555 | mask = IN_CLASSC_NET; |
| 3556 | else if (IN_MULTICAST(addr)) |
| 3557 | mask = IN_CLASSD_NET; |
| 3558 | else |
| 3559 | mask = 0xffffffff; |
| 3560 | |
| 3561 | in->sin_family = AF_INET; |
| 3562 | in->sin_len = sizeof(struct sockaddr_in); |
| 3563 | in->sin_addr.s_addr = htonl(addr); |
| 3564 | |
| 3565 | if (mask != 0xffffffff) { |
| 3566 | in_mask->sin_addr.s_addr = htonl(mask); |
| 3567 | cp = (char *)(&in_mask->sin_addr + 1); |
| 3568 | while (*--cp == 0 && cp > (char *)in_mask) |
| 3569 | ; |
| 3570 | in_mask->sin_len = 1 + cp - (char *)in_mask; |
| 3571 | } |
| 3572 | } |
| 3573 | |
| 3574 | static void |
| 3575 | table_alt(int ac, char **av, int opt) |
| 3576 | { |
| 3577 | struct ipfw_ioc_tblcont ent; |
| 3578 | struct ipfw_ioc_tblent *te; |
| 3579 | char *eptr; |
| 3580 | |
| 3581 | --ac; |
| 3582 | ++av; |
| 3583 | if (ac == 0) |
| 3584 | errx(EX_DATAERR, "missing table id"); |
| 3585 | |
| 3586 | memset(&ent, 0, sizeof(ent)); |
| 3587 | ent.tableid = strtoul(*av, &eptr, 0); |
| 3588 | ent.entcnt = 1; |
| 3589 | te = &ent.ent[0]; |
| 3590 | if (*eptr != '\0') |
| 3591 | errx(EX_DATAERR, "invalid table id %s", *av); |
| 3592 | |
| 3593 | --ac; |
| 3594 | ++av; |
| 3595 | if (ac == 0) |
| 3596 | errx(EX_DATAERR, "missing addresses"); |
| 3597 | |
| 3598 | while (ac > 0) { |
| 3599 | char *q; |
| 3600 | |
| 3601 | q = strchr(*av, '/'); |
| 3602 | if (q != NULL) { |
| 3603 | in_addr_t val; |
| 3604 | int bits; |
| 3605 | |
| 3606 | *q = '\0'; |
| 3607 | val = inet_network(*av); |
| 3608 | *q = '/'; |
| 3609 | if (val == INADDR_NONE) { |
| 3610 | fflush(stdout); |
| 3611 | errx(EX_DATAERR, "invalid address %s", *av); |
| 3612 | } |
| 3613 | |
| 3614 | bits = strtoul(q + 1, &eptr, 0); |
| 3615 | if (*eptr != '\0') { |
| 3616 | fflush(stdout); |
| 3617 | errx(EX_DATAERR, "invalid address %s", *av); |
| 3618 | } |
| 3619 | inet_makenetandmask(val, &te->key, &te->netmask, bits); |
| 3620 | } else { |
| 3621 | int n; |
| 3622 | |
| 3623 | n = inet_pton(AF_INET, *av, &te->key.sin_addr); |
| 3624 | if (n == 0) { |
| 3625 | fflush(stdout); |
| 3626 | errx(EX_DATAERR, "invalid address %s", *av); |
| 3627 | } else if (n < 0) { |
| 3628 | fflush(stdout); |
| 3629 | err(EX_UNAVAILABLE, "inet_pton failed"); |
| 3630 | } |
| 3631 | te->key.sin_family = AF_INET; |
| 3632 | te->key.sin_len = sizeof(struct sockaddr_in); |
| 3633 | } |
| 3634 | |
| 3635 | if (setsockopt(s, IPPROTO_IP, opt, &ent, sizeof(ent)) < 0) { |
| 3636 | if (opt == IP_FW_TBL_ADD && errno == EEXIST) { |
| 3637 | printf("Failed to add %s to table %d\n", |
| 3638 | *av, ent.tableid); |
| 3639 | } else if (opt == IP_FW_TBL_DEL && errno == ESRCH) { |
| 3640 | printf("Failed to delete %s from table %d\n", |
| 3641 | *av, ent.tableid); |
| 3642 | } else { |
| 3643 | fflush(stdout); |
| 3644 | err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)", |
| 3645 | opt == IP_FW_TBL_ADD ? "ADD" : "DEL"); |
| 3646 | } |
| 3647 | } else if (!do_quiet) { |
| 3648 | printf("%sed %s %s table %d\n", |
| 3649 | opt == IP_FW_TBL_ADD ? "Add" : "Delet", *av, |
| 3650 | opt == IP_FW_TBL_ADD ? "to" : "from", ent.tableid); |
| 3651 | } |
| 3652 | |
| 3653 | --ac; |
| 3654 | ++av; |
| 3655 | } |
| 3656 | } |
| 3657 | |
| 3658 | static void |
| 3659 | table_show(int ac, char **av) |
| 3660 | { |
| 3661 | struct ipfw_ioc_tblcont *cont = NULL; |
| 3662 | int tableid, count = 128, i, uwidth = 0, lwidth = 0; |
| 3663 | char *eptr; |
| 3664 | |
| 3665 | --ac; |
| 3666 | ++av; |
| 3667 | if (ac == 0) |
| 3668 | errx(EX_DATAERR, "missing table id"); |
| 3669 | |
| 3670 | tableid = strtoul(*av, &eptr, 0); |
| 3671 | if (*eptr != '\0') |
| 3672 | errx(EX_DATAERR, "invalid table id %s", *av); |
| 3673 | |
| 3674 | for (;;) { |
| 3675 | socklen_t len; |
| 3676 | |
| 3677 | len = __offsetof(struct ipfw_ioc_tblcont, ent[count]); |
| 3678 | cont = reallocf(cont, len); |
| 3679 | cont->tableid = tableid; |
| 3680 | |
| 3681 | if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, cont, &len) < 0) { |
| 3682 | if (errno == E2BIG) { |
| 3683 | count *= 2; |
| 3684 | continue; |
| 3685 | } |
| 3686 | err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)"); |
| 3687 | } |
| 3688 | break; |
| 3689 | } |
| 3690 | if (cont->entcnt == 0) |
| 3691 | return; |
| 3692 | |
| 3693 | if (do_acct) { |
| 3694 | for (i = 0; i < cont->entcnt; ++i) { |
| 3695 | int width; |
| 3696 | |
| 3697 | width = snprintf(NULL, 0, "%ju", |
| 3698 | (uintmax_t)cont->ent[i].use); |
| 3699 | if (width > uwidth) |
| 3700 | uwidth = width; |
| 3701 | } |
| 3702 | } |
| 3703 | |
| 3704 | for (i = 0; i < cont->entcnt; ++i) { |
| 3705 | const struct ipfw_ioc_tblent *te = &cont->ent[i]; |
| 3706 | char addr[INET_ADDRSTRLEN]; |
| 3707 | |
| 3708 | if (do_acct) |
| 3709 | printf("%*ju ", uwidth, (uintmax_t)te->use); |
| 3710 | if (do_time) { |
| 3711 | char timestr[30]; |
| 3712 | |
| 3713 | if (lwidth == 0) { |
| 3714 | time_t t0 = 0; |
| 3715 | |
| 3716 | strcpy(timestr, ctime(&t0)); |
| 3717 | *strchr(timestr, '\n') = '\0'; |
| 3718 | lwidth = strlen(timestr); |
| 3719 | } |
| 3720 | if (te->last_used) { |
| 3721 | time_t t = _long_to_time(te->last_used); |
| 3722 | |
| 3723 | strcpy(timestr, ctime(&t)); |
| 3724 | *strchr(timestr, '\n') = '\0'; |
| 3725 | printf("%s ", timestr); |
| 3726 | } else { |
| 3727 | printf("%*s ", lwidth, " "); |
| 3728 | } |
| 3729 | } |
| 3730 | |
| 3731 | if (te->netmask.sin_len == 0) { |
| 3732 | printf("%s\n", inet_ntop(AF_INET, |
| 3733 | &te->key.sin_addr, addr, sizeof(addr))); |
| 3734 | } else { |
| 3735 | struct sockaddr_in mask; |
| 3736 | int b; |
| 3737 | |
| 3738 | memset(&mask, 0, sizeof(mask)); |
| 3739 | memcpy(&mask, &te->netmask, |
| 3740 | te->netmask.sin_len); |
| 3741 | b = ffs(ntohl(te->netmask.sin_addr.s_addr)); |
| 3742 | b = 32 - (b - 1); |
| 3743 | |
| 3744 | printf("%s/%d\n", inet_ntop(AF_INET, |
| 3745 | &te->key.sin_addr, addr, sizeof(addr)), b); |
| 3746 | } |
| 3747 | } |
| 3748 | } |
| 3749 | |
| 3750 | static void |
| 3751 | table_zero(int ac, char **av) |
| 3752 | { |
| 3753 | struct ipfw_ioc_table tbl; |
| 3754 | |
| 3755 | --ac; |
| 3756 | ++av; |
| 3757 | |
| 3758 | memset(&tbl, 0, sizeof(tbl)); |
| 3759 | if (ac == 0) { |
| 3760 | tbl.tableid = -1; |
| 3761 | } else { |
| 3762 | char *eptr; |
| 3763 | |
| 3764 | tbl.tableid = strtoul(*av, &eptr, 0); |
| 3765 | if (*eptr != '\0') |
| 3766 | errx(EX_DATAERR, "invalid table id %s", *av); |
| 3767 | } |
| 3768 | |
| 3769 | if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_ZERO, &tbl, sizeof(tbl)) < 0) |
| 3770 | err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_ZERO)"); |
| 3771 | if (!do_quiet) |
| 3772 | printf("Accounting cleared\n"); |
| 3773 | } |
| 3774 | |
| 3775 | static void |
| 3776 | table_expire(int ac, char **av) |
| 3777 | { |
| 3778 | struct ipfw_ioc_tblexp tbl; |
| 3779 | char *eptr; |
| 3780 | socklen_t len; |
| 3781 | |
| 3782 | --ac; |
| 3783 | ++av; |
| 3784 | |
| 3785 | memset(&tbl, 0, sizeof(tbl)); |
| 3786 | if (ac == 0) { |
| 3787 | errx(EX_DATAERR, "missing expire time"); |
| 3788 | } else if (ac == 1) { |
| 3789 | tbl.tableid = -1; |
| 3790 | } else { |
| 3791 | tbl.tableid = strtoul(*av, &eptr, 0); |
| 3792 | if (*eptr != '\0') |
| 3793 | errx(EX_DATAERR, "invalid table id %s", *av); |
| 3794 | --ac; |
| 3795 | ++av; |
| 3796 | } |
| 3797 | |
| 3798 | tbl.expire = strtoul(*av, &eptr, 0); |
| 3799 | if (*eptr != '\0') |
| 3800 | errx(EX_DATAERR, "invalid expire timeout %s", *av); |
| 3801 | |
| 3802 | if (!do_force && !do_quiet) { /* need to ask user */ |
| 3803 | int c; |
| 3804 | |
| 3805 | printf("Are you sure? [yn] "); |
| 3806 | fflush(stdout); |
| 3807 | do { |
| 3808 | c = toupper(getc(stdin)); |
| 3809 | while (c != '\n' && getc(stdin) != '\n') |
| 3810 | if (feof(stdin)) |
| 3811 | return; /* and do not flush */ |
| 3812 | } while (c != 'Y' && c != 'N'); |
| 3813 | printf("\n"); |
| 3814 | if (c == 'N') /* user said no */ |
| 3815 | return; |
| 3816 | } |
| 3817 | |
| 3818 | len = sizeof(tbl); |
| 3819 | if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_EXPIRE, &tbl, &len) < 0) |
| 3820 | err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_EXPIRE)"); |
| 3821 | if (!do_quiet) { |
| 3822 | printf("Expired %d address%s\n", tbl.expcnt, |
| 3823 | (tbl.expcnt == 0 || tbl.expcnt > 1) ? "es" : ""); |
| 3824 | } |
| 3825 | } |
| 3826 | |
| 3827 | static int |
| 3828 | ipfw_main(int ac, char **av) |
| 3829 | { |
| 3830 | int ch; |
| 3831 | |
| 3832 | if (ac == 1) |
| 3833 | show_usage(); |
| 3834 | |
| 3835 | /* Set the force flag for non-interactive processes */ |
| 3836 | do_force = !isatty(STDIN_FILENO); |
| 3837 | |
| 3838 | optind = optreset = 1; |
| 3839 | while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1) |
| 3840 | switch (ch) { |
| 3841 | case 'h': /* help */ |
| 3842 | help(); |
| 3843 | break; /* NOTREACHED */ |
| 3844 | |
| 3845 | case 's': /* sort */ |
| 3846 | do_sort = atoi(optarg); |
| 3847 | break; |
| 3848 | case 'a': |
| 3849 | do_acct = 1; |
| 3850 | break; |
| 3851 | case 'c': |
| 3852 | do_compact = 1; |
| 3853 | break; |
| 3854 | case 'd': |
| 3855 | do_dynamic = 1; |
| 3856 | break; |
| 3857 | case 'e': |
| 3858 | do_expired = 1; |
| 3859 | break; |
| 3860 | case 'f': |
| 3861 | do_force = 1; |
| 3862 | break; |
| 3863 | case 'N': |
| 3864 | do_resolv = 1; |
| 3865 | break; |
| 3866 | case 'q': |
| 3867 | do_quiet = 1; |
| 3868 | break; |
| 3869 | case 'S': |
| 3870 | show_sets = 1; |
| 3871 | break; |
| 3872 | case 't': |
| 3873 | do_time = 1; |
| 3874 | break; |
| 3875 | case 'v': /* verbose */ |
| 3876 | verbose++; |
| 3877 | break; |
| 3878 | default: |
| 3879 | show_usage(); |
| 3880 | } |
| 3881 | |
| 3882 | ac -= optind; |
| 3883 | av += optind; |
| 3884 | NEED1("bad arguments, for usage summary ``ipfw''"); |
| 3885 | |
| 3886 | /* |
| 3887 | * optional: pipe, queue or table |
| 3888 | */ |
| 3889 | if (!strncmp(*av, "pipe", strlen(*av))) { |
| 3890 | do_pipe = 1; |
| 3891 | ac--; |
| 3892 | av++; |
| 3893 | } else if (!strncmp(*av, "queue", strlen(*av))) { |
| 3894 | do_pipe = 2; |
| 3895 | ac--; |
| 3896 | av++; |
| 3897 | } else if (!strncmp(*av, "table", strlen(*av))) { |
| 3898 | do_table = 1; |
| 3899 | ac--; |
| 3900 | av++; |
| 3901 | } |
| 3902 | NEED1("missing command"); |
| 3903 | |
| 3904 | /* |
| 3905 | * for pipes, queues and table we normally say 'pipe NN config' |
| 3906 | * but the code is easier to parse as 'pipe config NN' so we |
| 3907 | * swap the two arguments. |
| 3908 | */ |
| 3909 | if ((do_pipe > 0 || do_table > 0) && ac > 1 && |
| 3910 | *av[0] >= '0' && *av[0] <= '9') { |
| 3911 | char *p = av[0]; |
| 3912 | av[0] = av[1]; |
| 3913 | av[1] = p; |
| 3914 | } |
| 3915 | if (do_table) { |
| 3916 | if (!strncmp(*av, "create", strlen(*av))) |
| 3917 | table_create(ac, av); |
| 3918 | else if (!strncmp(*av, "destroy", strlen(*av))) |
| 3919 | table_flush(ac, av, IP_FW_TBL_DESTROY); |
| 3920 | else if (!strncmp(*av, "list", strlen(*av))) |
| 3921 | table_list(); |
| 3922 | else if (!strncmp(*av, "add", strlen(*av))) |
| 3923 | table_alt(ac, av, IP_FW_TBL_ADD); |
| 3924 | else if (!strncmp(*av, "delete", strlen(*av))) |
| 3925 | table_alt(ac, av, IP_FW_TBL_DEL); |
| 3926 | else if (!strncmp(*av, "flush", strlen(*av))) |
| 3927 | table_flush(ac, av, IP_FW_TBL_FLUSH); |
| 3928 | else if (!strncmp(*av, "print", strlen(*av))) |
| 3929 | table_show(ac, av); |
| 3930 | else if (!strncmp(*av, "show", strlen(*av))) { |
| 3931 | do_acct++; |
| 3932 | table_show(ac, av); |
| 3933 | } else if (!strncmp(*av, "zero", strlen(*av))) |
| 3934 | table_zero(ac, av); |
| 3935 | else if (!strncmp(*av, "expire", strlen(*av))) |
| 3936 | table_expire(ac, av); |
| 3937 | else |
| 3938 | errx(EX_USAGE, "bad command `%s'", *av); |
| 3939 | return 0; |
| 3940 | } |
| 3941 | if (!strncmp(*av, "add", strlen(*av))) |
| 3942 | add(ac, av); |
| 3943 | else if (do_pipe && !strncmp(*av, "config", strlen(*av))) |
| 3944 | config_pipe(ac, av); |
| 3945 | else if (!strncmp(*av, "delete", strlen(*av))) |
| 3946 | delete(ac, av); |
| 3947 | else if (!strncmp(*av, "flush", strlen(*av))) |
| 3948 | flush(); |
| 3949 | else if (!strncmp(*av, "zero", strlen(*av))) |
| 3950 | zero(ac, av); |
| 3951 | else if (!strncmp(*av, "resetlog", strlen(*av))) |
| 3952 | resetlog(ac, av); |
| 3953 | else if (!strncmp(*av, "print", strlen(*av)) || |
| 3954 | !strncmp(*av, "list", strlen(*av))) |
| 3955 | list(ac, av); |
| 3956 | else if (!strncmp(*av, "enable", strlen(*av))) |
| 3957 | sysctl_handler(ac, av, 1); |
| 3958 | else if (!strncmp(*av, "disable", strlen(*av))) |
| 3959 | sysctl_handler(ac, av, 0); |
| 3960 | else if (!strncmp(*av, "set", strlen(*av))) |
| 3961 | sets_handler(ac, av); |
| 3962 | else if (!strncmp(*av, "show", strlen(*av))) { |
| 3963 | do_acct++; |
| 3964 | list(ac, av); |
| 3965 | } else |
| 3966 | errx(EX_USAGE, "bad command `%s'", *av); |
| 3967 | return 0; |
| 3968 | } |
| 3969 | |
| 3970 | |
| 3971 | static void |
| 3972 | ipfw_readfile(int ac, char *av[]) |
| 3973 | { |
| 3974 | #define MAX_ARGS 32 |
| 3975 | #define WHITESP " \t\f\v\n\r" |
| 3976 | char buf[BUFSIZ]; |
| 3977 | char *a, *p, *args[MAX_ARGS], *cmd = NULL; |
| 3978 | char linename[20]; |
| 3979 | int i=0, lineno=0, qflag=0, pflag=0, status; |
| 3980 | FILE *f = NULL; |
| 3981 | pid_t preproc = 0; |
| 3982 | int c; |
| 3983 | |
| 3984 | while ((c = getopt(ac, av, "D:U:p:q")) != -1) |
| 3985 | switch(c) { |
| 3986 | case 'D': |
| 3987 | if (!pflag) |
| 3988 | errx(EX_USAGE, "-D requires -p"); |
| 3989 | if (i > MAX_ARGS - 2) |
| 3990 | errx(EX_USAGE, |
| 3991 | "too many -D or -U options"); |
| 3992 | args[i++] = __DECONST(char *, "-D"); |
| 3993 | args[i++] = optarg; |
| 3994 | break; |
| 3995 | |
| 3996 | case 'U': |
| 3997 | if (!pflag) |
| 3998 | errx(EX_USAGE, "-U requires -p"); |
| 3999 | if (i > MAX_ARGS - 2) |
| 4000 | errx(EX_USAGE, |
| 4001 | "too many -D or -U options"); |
| 4002 | args[i++] = __DECONST(char *, "-U"); |
| 4003 | args[i++] = optarg; |
| 4004 | break; |
| 4005 | |
| 4006 | case 'p': |
| 4007 | pflag = 1; |
| 4008 | cmd = optarg; |
| 4009 | args[0] = cmd; |
| 4010 | i = 1; |
| 4011 | break; |
| 4012 | |
| 4013 | case 'q': |
| 4014 | qflag = 1; |
| 4015 | break; |
| 4016 | |
| 4017 | default: |
| 4018 | errx(EX_USAGE, "bad arguments, for usage" |
| 4019 | " summary ``ipfw''"); |
| 4020 | } |
| 4021 | |
| 4022 | av += optind; |
| 4023 | ac -= optind; |
| 4024 | if (ac != 1) |
| 4025 | errx(EX_USAGE, "extraneous filename arguments"); |
| 4026 | |
| 4027 | if ((f = fopen(av[0], "r")) == NULL) |
| 4028 | err(EX_UNAVAILABLE, "fopen: %s", av[0]); |
| 4029 | |
| 4030 | if (pflag) { |
| 4031 | /* pipe through preprocessor (cpp or m4) */ |
| 4032 | int pipedes[2]; |
| 4033 | |
| 4034 | args[i] = NULL; |
| 4035 | |
| 4036 | if (pipe(pipedes) == -1) |
| 4037 | err(EX_OSERR, "cannot create pipe"); |
| 4038 | |
| 4039 | switch((preproc = fork())) { |
| 4040 | case -1: |
| 4041 | err(EX_OSERR, "cannot fork"); |
| 4042 | |
| 4043 | case 0: |
| 4044 | /* child */ |
| 4045 | if (dup2(fileno(f), 0) == -1 |
| 4046 | || dup2(pipedes[1], 1) == -1) |
| 4047 | err(EX_OSERR, "dup2()"); |
| 4048 | fclose(f); |
| 4049 | close(pipedes[1]); |
| 4050 | close(pipedes[0]); |
| 4051 | execvp(cmd, args); |
| 4052 | err(EX_OSERR, "execvp(%s) failed", cmd); |
| 4053 | |
| 4054 | default: |
| 4055 | /* parent */ |
| 4056 | fclose(f); |
| 4057 | close(pipedes[1]); |
| 4058 | if ((f = fdopen(pipedes[0], "r")) == NULL) { |
| 4059 | int savederrno = errno; |
| 4060 | |
| 4061 | kill(preproc, SIGTERM); |
| 4062 | errno = savederrno; |
| 4063 | err(EX_OSERR, "fdopen()"); |
| 4064 | } |
| 4065 | } |
| 4066 | } |
| 4067 | |
| 4068 | while (fgets(buf, BUFSIZ, f)) { |
| 4069 | lineno++; |
| 4070 | snprintf(linename, sizeof(linename), "Line %d", lineno); |
| 4071 | args[0] = linename; |
| 4072 | |
| 4073 | if (*buf == '#') |
| 4074 | continue; |
| 4075 | if ((p = strchr(buf, '#')) != NULL) |
| 4076 | *p = '\0'; |
| 4077 | i = 1; |
| 4078 | if (qflag) |
| 4079 | args[i++] = __DECONST(char *, "-q"); |
| 4080 | for (a = strtok(buf, WHITESP); |
| 4081 | a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) |
| 4082 | args[i] = a; |
| 4083 | if (i == (qflag? 2: 1)) |
| 4084 | continue; |
| 4085 | if (i == MAX_ARGS) |
| 4086 | errx(EX_USAGE, "%s: too many arguments", |
| 4087 | linename); |
| 4088 | args[i] = NULL; |
| 4089 | |
| 4090 | ipfw_main(i, args); |
| 4091 | } |
| 4092 | fclose(f); |
| 4093 | if (pflag) { |
| 4094 | if (waitpid(preproc, &status, 0) == -1) |
| 4095 | errx(EX_OSERR, "waitpid()"); |
| 4096 | if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) |
| 4097 | errx(EX_UNAVAILABLE, |
| 4098 | "preprocessor exited with status %d", |
| 4099 | WEXITSTATUS(status)); |
| 4100 | else if (WIFSIGNALED(status)) |
| 4101 | errx(EX_UNAVAILABLE, |
| 4102 | "preprocessor exited with signal %d", |
| 4103 | WTERMSIG(status)); |
| 4104 | } |
| 4105 | } |
| 4106 | |
| 4107 | int |
| 4108 | main(int ac, char *av[]) |
| 4109 | { |
| 4110 | s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); |
| 4111 | if (s < 0) |
| 4112 | err(EX_UNAVAILABLE, "socket"); |
| 4113 | |
| 4114 | /* |
| 4115 | * If the last argument is an absolute pathname, interpret it |
| 4116 | * as a file to be preprocessed. |
| 4117 | */ |
| 4118 | |
| 4119 | if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) |
| 4120 | ipfw_readfile(ac, av); |
| 4121 | else |
| 4122 | ipfw_main(ac, av); |
| 4123 | return EX_OK; |
| 4124 | } |