1 /*- 2 * Copyright (c) 2002-2003 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 21 enum cmdline_prog { 22 cmdline_prog_ipfw, 23 cmdline_prog_dnctl 24 }; 25 26 /* 27 * Options that can be set on the command line. 28 * When reading commands from a file, a subset of the options can also 29 * be applied globally by specifying them before the file name. 30 * After that, each line can contain its own option that changes 31 * the global value. 32 * XXX The context is not restored after each line. 33 */ 34 35 struct cmdline_opts { 36 /* boolean options: */ 37 int do_value_as_ip; /* show table value as IP */ 38 int do_resolv; /* try to resolve all ip to names */ 39 int do_time; /* Show time stamps */ 40 int do_quiet; /* Be quiet in add and flush */ 41 int do_pipe; /* this cmd refers to a pipe/queue/sched */ 42 int do_nat; /* this cmd refers to a nat config */ 43 int do_compact; /* show rules in compact mode */ 44 int do_force; /* do not ask for confirmation */ 45 int show_sets; /* display the set each rule belongs to */ 46 int test_only; /* only check syntax */ 47 int comment_only; /* only print action and comment */ 48 int verbose; /* be verbose on some commands */ 49 int debug_only; /* output ioctl i/o on stdout */ 50 51 /* The options below can have multiple values. */ 52 53 int do_dynamic; /* 1 - display dynamic rules */ 54 /* 2 - display/delete only dynamic rules */ 55 int do_sort; /* field to sort results (0 = no) */ 56 /* valid fields are 1 and above */ 57 58 uint32_t use_set; /* work with specified set number */ 59 /* 0 means all sets, otherwise apply to set use_set - 1 */ 60 61 enum cmdline_prog prog; /* Are we ipfw or dnctl? */ 62 }; 63 64 int is_ipfw(void); 65 66 enum { 67 TIMESTAMP_NONE = 0, 68 TIMESTAMP_STRING, 69 TIMESTAMP_NUMERIC, 70 }; 71 72 extern struct cmdline_opts g_co; 73 74 /* 75 * _s_x is a structure that stores a string <-> token pairs, used in 76 * various places in the parser. Entries are stored in arrays, 77 * with an entry with s=NULL as terminator. 78 * The search routines are match_token() and match_value(). 79 * Often, an element with x=0 contains an error string. 80 * 81 */ 82 struct _s_x { 83 char const *s; 84 int x; 85 }; 86 87 extern struct _s_x f_ipdscp[]; 88 89 enum tokens { 90 TOK_NULL=0, 91 92 TOK_OR, 93 TOK_NOT, 94 TOK_STARTBRACE, 95 TOK_ENDBRACE, 96 97 TOK_ABORT6, 98 TOK_ABORT, 99 TOK_ACCEPT, 100 TOK_COUNT, 101 TOK_EACTION, 102 TOK_PIPE, 103 TOK_LINK, 104 TOK_QUEUE, 105 TOK_FLOWSET, 106 TOK_SCHED, 107 TOK_DIVERT, 108 TOK_TEE, 109 TOK_NETGRAPH, 110 TOK_NGTEE, 111 TOK_FORWARD, 112 TOK_SKIPTO, 113 TOK_DENY, 114 TOK_REJECT, 115 TOK_RESET, 116 TOK_UNREACH, 117 TOK_CHECKSTATE, 118 TOK_NAT, 119 TOK_REASS, 120 TOK_CALL, 121 TOK_RETURN, 122 123 TOK_ALTQ, 124 TOK_LOG, 125 TOK_TAG, 126 TOK_UNTAG, 127 128 TOK_TAGGED, 129 TOK_UID, 130 TOK_GID, 131 TOK_JAIL, 132 TOK_IN, 133 TOK_LIMIT, 134 TOK_SETLIMIT, 135 TOK_KEEPSTATE, 136 TOK_RECORDSTATE, 137 TOK_LAYER2, 138 TOK_OUT, 139 TOK_DIVERTED, 140 TOK_DIVERTEDLOOPBACK, 141 TOK_DIVERTEDOUTPUT, 142 TOK_XMIT, 143 TOK_RECV, 144 TOK_VIA, 145 TOK_FRAG, 146 TOK_IPOPTS, 147 TOK_IPLEN, 148 TOK_IPID, 149 TOK_IPPRECEDENCE, 150 TOK_DSCP, 151 TOK_IPTOS, 152 TOK_IPTTL, 153 TOK_IPVER, 154 TOK_ESTAB, 155 TOK_SETUP, 156 TOK_TCPDATALEN, 157 TOK_TCPFLAGS, 158 TOK_TCPOPTS, 159 TOK_TCPSEQ, 160 TOK_TCPACK, 161 TOK_TCPMSS, 162 TOK_TCPWIN, 163 TOK_ICMPTYPES, 164 TOK_MAC, 165 TOK_MACTYPE, 166 TOK_VERREVPATH, 167 TOK_VERSRCREACH, 168 TOK_ANTISPOOF, 169 TOK_IPSEC, 170 TOK_COMMENT, 171 172 TOK_PLR, 173 TOK_NOERROR, 174 TOK_BUCKETS, 175 TOK_DSTIP, 176 TOK_SRCIP, 177 TOK_DSTPORT, 178 TOK_SRCPORT, 179 TOK_DSTMAC, 180 TOK_SRCMAC, 181 TOK_ALL, 182 TOK_MASK, 183 TOK_FLOW_MASK, 184 TOK_SCHED_MASK, 185 TOK_BW, 186 TOK_DELAY, 187 TOK_PROFILE, 188 TOK_BURST, 189 TOK_RED, 190 TOK_GRED, 191 TOK_ECN, 192 TOK_DROPTAIL, 193 TOK_PROTO, 194 #ifdef NEW_AQM 195 /* AQM tokens*/ 196 TOK_NO_ECN, 197 TOK_CODEL, 198 TOK_FQ_CODEL, 199 TOK_TARGET, 200 TOK_INTERVAL, 201 TOK_FLOWS, 202 TOK_QUANTUM, 203 204 TOK_PIE, 205 TOK_FQ_PIE, 206 TOK_TUPDATE, 207 TOK_MAX_BURST, 208 TOK_MAX_ECNTH, 209 TOK_ALPHA, 210 TOK_BETA, 211 TOK_CAPDROP, 212 TOK_NO_CAPDROP, 213 TOK_ONOFF, 214 TOK_DRE, 215 TOK_TS, 216 TOK_DERAND, 217 TOK_NO_DERAND, 218 #endif 219 /* dummynet tokens */ 220 TOK_WEIGHT, 221 TOK_LMAX, 222 TOK_PRI, 223 TOK_TYPE, 224 TOK_SLOTSIZE, 225 226 TOK_IP, 227 TOK_IF, 228 TOK_ALOG, 229 TOK_DENY_INC, 230 TOK_SAME_PORTS, 231 TOK_UNREG_ONLY, 232 TOK_UNREG_CGN, 233 TOK_SKIP_GLOBAL, 234 TOK_RESET_ADDR, 235 TOK_ALIAS_REV, 236 TOK_PROXY_ONLY, 237 TOK_REDIR_ADDR, 238 TOK_REDIR_PORT, 239 TOK_REDIR_PROTO, 240 241 TOK_IPV6, 242 TOK_FLOWID, 243 TOK_ICMP6TYPES, 244 TOK_EXT6HDR, 245 TOK_DSTIP6, 246 TOK_SRCIP6, 247 248 TOK_IPV4, 249 TOK_UNREACH6, 250 TOK_RESET6, 251 252 TOK_FIB, 253 TOK_SETFIB, 254 TOK_LOOKUP, 255 TOK_SOCKARG, 256 TOK_SETDSCP, 257 TOK_FLOW, 258 TOK_IFLIST, 259 /* Table tokens */ 260 TOK_CREATE, 261 TOK_DESTROY, 262 TOK_LIST, 263 TOK_INFO, 264 TOK_DETAIL, 265 TOK_MODIFY, 266 TOK_FLUSH, 267 TOK_SWAP, 268 TOK_ADD, 269 TOK_DEL, 270 TOK_VALTYPE, 271 TOK_ALGO, 272 TOK_TALIST, 273 TOK_ATOMIC, 274 TOK_LOCK, 275 TOK_UNLOCK, 276 TOK_VLIST, 277 TOK_OLIST, 278 TOK_MISSING, 279 TOK_ORFLUSH, 280 281 /* NAT64 tokens */ 282 TOK_NAT64STL, 283 TOK_NAT64LSN, 284 TOK_STATS, 285 TOK_STATES, 286 TOK_CONFIG, 287 TOK_TABLE4, 288 TOK_TABLE6, 289 TOK_PREFIX4, 290 TOK_PREFIX6, 291 TOK_AGG_LEN, 292 TOK_AGG_COUNT, 293 TOK_MAX_PORTS, 294 TOK_STATES_CHUNKS, 295 TOK_JMAXLEN, 296 TOK_PORT_RANGE, 297 TOK_PORT_ALIAS, 298 TOK_HOST_DEL_AGE, 299 TOK_PG_DEL_AGE, 300 TOK_TCP_SYN_AGE, 301 TOK_TCP_CLOSE_AGE, 302 TOK_TCP_EST_AGE, 303 TOK_UDP_AGE, 304 TOK_ICMP_AGE, 305 TOK_LOGOFF, 306 TOK_PRIVATE, 307 TOK_PRIVATEOFF, 308 309 /* NAT64 CLAT tokens */ 310 TOK_NAT64CLAT, 311 TOK_PLAT_PREFIX, 312 TOK_CLAT_PREFIX, 313 314 /* NPTv6 tokens */ 315 TOK_NPTV6, 316 TOK_INTPREFIX, 317 TOK_EXTPREFIX, 318 TOK_PREFIXLEN, 319 TOK_EXTIF, 320 321 TOK_TCPSETMSS, 322 323 TOK_MARK, 324 TOK_SETMARK, 325 326 TOK_SKIPACTION, 327 TOK_UDP_EIM, 328 }; 329 330 /* 331 * the following macro returns an error message if we run out of 332 * arguments. 333 */ 334 #define NEED(_p, msg) {if (!_p) errx(EX_USAGE, msg);} 335 #define NEED1(msg) {if (!(*av)) errx(EX_USAGE, msg);} 336 337 struct buf_pr { 338 char *buf; /* allocated buffer */ 339 char *ptr; /* current pointer */ 340 size_t size; /* total buffer size */ 341 size_t avail; /* available storage */ 342 size_t needed; /* length needed */ 343 }; 344 345 int pr_u64(struct buf_pr *bp, void *pd, int width); 346 int bp_alloc(struct buf_pr *b, size_t size); 347 void bp_free(struct buf_pr *b); 348 int bprintf(struct buf_pr *b, const char *format, ...); 349 350 351 /* memory allocation support */ 352 void *safe_calloc(size_t number, size_t size); 353 void *safe_realloc(void *ptr, size_t size); 354 355 /* string comparison functions used for historical compatibility */ 356 int _substrcmp(const char *str1, const char* str2); 357 int _substrcmp2(const char *str1, const char* str2, const char* str3); 358 int stringnum_cmp(const char *a, const char *b); 359 360 /* utility functions */ 361 int match_token(struct _s_x *table, const char *string); 362 int match_token_relaxed(struct _s_x *table, const char *string); 363 int get_token(struct _s_x *table, const char *string, const char *errbase); 364 char const *match_value(struct _s_x *p, int value); 365 size_t concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 366 const char *delimiter); 367 int fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 368 uint32_t *clear); 369 void print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set); 370 371 struct _ip_fw3_opheader; 372 int do_cmd(int optname, void *optval, uintptr_t optlen); 373 int do_set3(int optname, struct _ip_fw3_opheader *op3, size_t optlen); 374 int do_get3(int optname, struct _ip_fw3_opheader *op3, size_t *optlen); 375 376 struct in6_addr; 377 void n2mask(struct in6_addr *mask, int n); 378 int contigmask(const uint8_t *p, int len); 379 380 /* 381 * Forward declarations to avoid include way too many headers. 382 * C does not allow duplicated typedefs, so we use the base struct 383 * that the typedef points to. 384 * Should the typedefs use a different type, the compiler will 385 * still detect the change when compiling the body of the 386 * functions involved, so we do not lose error checking. 387 */ 388 struct _ipfw_insn; 389 struct _ipfw_insn_altq; 390 struct _ipfw_insn_u32; 391 struct _ipfw_insn_ip6; 392 struct _ipfw_insn_icmp6; 393 394 /* 395 * The reserved set numer. This is a constant in ip_fw.h 396 * but we store it in a variable so other files do not depend 397 * in that header just for one constant. 398 */ 399 extern int resvd_set_number; 400 401 /* first-level command handlers */ 402 void ipfw_add(char *av[]); 403 void ipfw_show_nat(int ac, char **av); 404 int ipfw_delete_nat(int i); 405 void ipfw_config_pipe(int ac, char **av); 406 void ipfw_config_nat(int ac, char **av); 407 void ipfw_sets_handler(char *av[]); 408 void ipfw_table_handler(int ac, char *av[]); 409 void ipfw_sysctl_handler(char *av[], int which); 410 void ipfw_delete(char *av[]); 411 void ipfw_flush(int force); 412 void ipfw_zero(int ac, char *av[], int optname); 413 void ipfw_list(int ac, char *av[], int show_counters); 414 void ipfw_internal_handler(int ac, char *av[]); 415 void ipfw_nat64clat_handler(int ac, char *av[]); 416 void ipfw_nat64lsn_handler(int ac, char *av[]); 417 void ipfw_nat64stl_handler(int ac, char *av[]); 418 void ipfw_nptv6_handler(int ac, char *av[]); 419 int ipfw_check_object_name(const char *name); 420 int ipfw_check_nat64prefix(const struct in6_addr *prefix, int length); 421 422 #ifdef PF 423 /* altq.c */ 424 void altq_set_enabled(int enabled); 425 u_int32_t altq_name_to_qid(const char *name); 426 void print_altq_cmd(struct buf_pr *bp, const struct _ipfw_insn_altq *altqptr); 427 #else 428 #define NO_ALTQ 429 #endif 430 431 /* dummynet.c */ 432 void dummynet_list(int ac, char *av[], int show_counters); 433 void dummynet_flush(void); 434 int ipfw_delete_pipe(int pipe_or_queue, int n); 435 436 /* ipv6.c */ 437 void print_unreach6_code(struct buf_pr *bp, uint16_t code); 438 void print_ip6(struct buf_pr *bp, const struct _ipfw_insn_ip6 *cmd); 439 void print_flow6id(struct buf_pr *bp, const struct _ipfw_insn_u32 *cmd); 440 void print_icmp6types(struct buf_pr *bp, const struct _ipfw_insn_u32 *cmd); 441 void print_ext6hdr(struct buf_pr *bp, const struct _ipfw_insn *cmd); 442 443 struct tidx; 444 struct _ipfw_insn *add_srcip6(struct _ipfw_insn *cmd, char *av, int cblen, 445 struct tidx *tstate); 446 struct _ipfw_insn *add_dstip6(struct _ipfw_insn *cmd, char *av, int cblen, 447 struct tidx *tstate); 448 449 void fill_flow6(struct _ipfw_insn_u32 *cmd, char *av, int cblen); 450 uint16_t get_unreach6_code(const char *str); 451 void fill_icmp6types(struct _ipfw_insn_icmp6 *cmd, char *av, int cblen); 452 int fill_ext6hdr(struct _ipfw_insn *cmd, char *av); 453 454 /* ipfw2.c */ 455 void bp_flush(struct buf_pr *b); 456 void fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 457 struct tidx *tstate); 458 459 /* tables.c */ 460 struct _ipfw_obj_ctlv; 461 struct _ipfw_obj_ntlv; 462 int table_check_name(const char *tablename); 463 void ipfw_list_ta(int ac, char *av[]); 464 void ipfw_list_values(int ac, char *av[]); 465 void table_fill_ntlv(struct _ipfw_obj_ntlv *ntlv, const char *name, 466 uint8_t set, uint16_t uidx); 467 468