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 * $FreeBSD$ 21 */ 22 23 enum cmdline_prog { 24 cmdline_prog_ipfw, 25 cmdline_prog_dnctl 26 }; 27 28 /* 29 * Options that can be set on the command line. 30 * When reading commands from a file, a subset of the options can also 31 * be applied globally by specifying them before the file name. 32 * After that, each line can contain its own option that changes 33 * the global value. 34 * XXX The context is not restored after each line. 35 */ 36 37 struct cmdline_opts { 38 /* boolean options: */ 39 int do_value_as_ip; /* show table value as IP */ 40 int do_resolv; /* try to resolve all ip to names */ 41 int do_time; /* Show time stamps */ 42 int do_quiet; /* Be quiet in add and flush */ 43 int do_pipe; /* this cmd refers to a pipe/queue/sched */ 44 int do_nat; /* this cmd refers to a nat config */ 45 int do_compact; /* show rules in compact mode */ 46 int do_force; /* do not ask for confirmation */ 47 int show_sets; /* display the set each rule belongs to */ 48 int test_only; /* only check syntax */ 49 int comment_only; /* only print action and comment */ 50 int verbose; /* be verbose on some commands */ 51 52 /* The options below can have multiple values. */ 53 54 int do_dynamic; /* 1 - display dynamic rules */ 55 /* 2 - display/delete only dynamic rules */ 56 int do_sort; /* field to sort results (0 = no) */ 57 /* valid fields are 1 and above */ 58 59 uint32_t use_set; /* work with specified set number */ 60 /* 0 means all sets, otherwise apply to set use_set - 1 */ 61 62 enum cmdline_prog prog; /* Are we ipfw or dnctl? */ 63 }; 64 65 int is_ipfw(void); 66 67 enum { 68 TIMESTAMP_NONE = 0, 69 TIMESTAMP_STRING, 70 TIMESTAMP_NUMERIC, 71 }; 72 73 extern struct cmdline_opts g_co; 74 75 /* 76 * _s_x is a structure that stores a string <-> token pairs, used in 77 * various places in the parser. Entries are stored in arrays, 78 * with an entry with s=NULL as terminator. 79 * The search routines are match_token() and match_value(). 80 * Often, an element with x=0 contains an error string. 81 * 82 */ 83 struct _s_x { 84 char const *s; 85 int x; 86 }; 87 88 extern struct _s_x f_ipdscp[]; 89 90 enum tokens { 91 TOK_NULL=0, 92 93 TOK_OR, 94 TOK_NOT, 95 TOK_STARTBRACE, 96 TOK_ENDBRACE, 97 98 TOK_ABORT6, 99 TOK_ABORT, 100 TOK_ACCEPT, 101 TOK_COUNT, 102 TOK_EACTION, 103 TOK_PIPE, 104 TOK_LINK, 105 TOK_QUEUE, 106 TOK_FLOWSET, 107 TOK_SCHED, 108 TOK_DIVERT, 109 TOK_TEE, 110 TOK_NETGRAPH, 111 TOK_NGTEE, 112 TOK_FORWARD, 113 TOK_SKIPTO, 114 TOK_DENY, 115 TOK_REJECT, 116 TOK_RESET, 117 TOK_UNREACH, 118 TOK_CHECKSTATE, 119 TOK_NAT, 120 TOK_REASS, 121 TOK_CALL, 122 TOK_RETURN, 123 124 TOK_ALTQ, 125 TOK_LOG, 126 TOK_TAG, 127 TOK_UNTAG, 128 129 TOK_TAGGED, 130 TOK_UID, 131 TOK_GID, 132 TOK_JAIL, 133 TOK_IN, 134 TOK_LIMIT, 135 TOK_SETLIMIT, 136 TOK_KEEPSTATE, 137 TOK_RECORDSTATE, 138 TOK_LAYER2, 139 TOK_OUT, 140 TOK_DIVERTED, 141 TOK_DIVERTEDLOOPBACK, 142 TOK_DIVERTEDOUTPUT, 143 TOK_XMIT, 144 TOK_RECV, 145 TOK_VIA, 146 TOK_FRAG, 147 TOK_IPOPTS, 148 TOK_IPLEN, 149 TOK_IPID, 150 TOK_IPPRECEDENCE, 151 TOK_DSCP, 152 TOK_IPTOS, 153 TOK_IPTTL, 154 TOK_IPVER, 155 TOK_ESTAB, 156 TOK_SETUP, 157 TOK_TCPDATALEN, 158 TOK_TCPFLAGS, 159 TOK_TCPOPTS, 160 TOK_TCPSEQ, 161 TOK_TCPACK, 162 TOK_TCPMSS, 163 TOK_TCPWIN, 164 TOK_ICMPTYPES, 165 TOK_MAC, 166 TOK_MACTYPE, 167 TOK_VERREVPATH, 168 TOK_VERSRCREACH, 169 TOK_ANTISPOOF, 170 TOK_IPSEC, 171 TOK_COMMENT, 172 173 TOK_PLR, 174 TOK_NOERROR, 175 TOK_BUCKETS, 176 TOK_DSTIP, 177 TOK_SRCIP, 178 TOK_DSTPORT, 179 TOK_SRCPORT, 180 TOK_DSTMAC, 181 TOK_SRCMAC, 182 TOK_ALL, 183 TOK_MASK, 184 TOK_FLOW_MASK, 185 TOK_SCHED_MASK, 186 TOK_BW, 187 TOK_DELAY, 188 TOK_PROFILE, 189 TOK_BURST, 190 TOK_RED, 191 TOK_GRED, 192 TOK_ECN, 193 TOK_DROPTAIL, 194 TOK_PROTO, 195 #ifdef NEW_AQM 196 /* AQM tokens*/ 197 TOK_NO_ECN, 198 TOK_CODEL, 199 TOK_FQ_CODEL, 200 TOK_TARGET, 201 TOK_INTERVAL, 202 TOK_FLOWS, 203 TOK_QUANTUM, 204 205 TOK_PIE, 206 TOK_FQ_PIE, 207 TOK_TUPDATE, 208 TOK_MAX_BURST, 209 TOK_MAX_ECNTH, 210 TOK_ALPHA, 211 TOK_BETA, 212 TOK_CAPDROP, 213 TOK_NO_CAPDROP, 214 TOK_ONOFF, 215 TOK_DRE, 216 TOK_TS, 217 TOK_DERAND, 218 TOK_NO_DERAND, 219 #endif 220 /* dummynet tokens */ 221 TOK_WEIGHT, 222 TOK_LMAX, 223 TOK_PRI, 224 TOK_TYPE, 225 TOK_SLOTSIZE, 226 227 TOK_IP, 228 TOK_IF, 229 TOK_ALOG, 230 TOK_DENY_INC, 231 TOK_SAME_PORTS, 232 TOK_UNREG_ONLY, 233 TOK_UNREG_CGN, 234 TOK_SKIP_GLOBAL, 235 TOK_RESET_ADDR, 236 TOK_ALIAS_REV, 237 TOK_PROXY_ONLY, 238 TOK_REDIR_ADDR, 239 TOK_REDIR_PORT, 240 TOK_REDIR_PROTO, 241 242 TOK_IPV6, 243 TOK_FLOWID, 244 TOK_ICMP6TYPES, 245 TOK_EXT6HDR, 246 TOK_DSTIP6, 247 TOK_SRCIP6, 248 249 TOK_IPV4, 250 TOK_UNREACH6, 251 TOK_RESET6, 252 253 TOK_FIB, 254 TOK_SETFIB, 255 TOK_LOOKUP, 256 TOK_SOCKARG, 257 TOK_SETDSCP, 258 TOK_FLOW, 259 TOK_IFLIST, 260 /* Table tokens */ 261 TOK_CREATE, 262 TOK_DESTROY, 263 TOK_LIST, 264 TOK_INFO, 265 TOK_DETAIL, 266 TOK_MODIFY, 267 TOK_FLUSH, 268 TOK_SWAP, 269 TOK_ADD, 270 TOK_DEL, 271 TOK_VALTYPE, 272 TOK_ALGO, 273 TOK_TALIST, 274 TOK_ATOMIC, 275 TOK_LOCK, 276 TOK_UNLOCK, 277 TOK_VLIST, 278 TOK_OLIST, 279 TOK_MISSING, 280 TOK_ORFLUSH, 281 282 /* NAT64 tokens */ 283 TOK_NAT64STL, 284 TOK_NAT64LSN, 285 TOK_STATS, 286 TOK_STATES, 287 TOK_CONFIG, 288 TOK_TABLE4, 289 TOK_TABLE6, 290 TOK_PREFIX4, 291 TOK_PREFIX6, 292 TOK_AGG_LEN, 293 TOK_AGG_COUNT, 294 TOK_MAX_PORTS, 295 TOK_STATES_CHUNKS, 296 TOK_JMAXLEN, 297 TOK_PORT_RANGE, 298 TOK_PORT_ALIAS, 299 TOK_HOST_DEL_AGE, 300 TOK_PG_DEL_AGE, 301 TOK_TCP_SYN_AGE, 302 TOK_TCP_CLOSE_AGE, 303 TOK_TCP_EST_AGE, 304 TOK_UDP_AGE, 305 TOK_ICMP_AGE, 306 TOK_LOGOFF, 307 TOK_PRIVATE, 308 TOK_PRIVATEOFF, 309 310 /* NAT64 CLAT tokens */ 311 TOK_NAT64CLAT, 312 TOK_PLAT_PREFIX, 313 TOK_CLAT_PREFIX, 314 315 /* NPTv6 tokens */ 316 TOK_NPTV6, 317 TOK_INTPREFIX, 318 TOK_EXTPREFIX, 319 TOK_PREFIXLEN, 320 TOK_EXTIF, 321 322 TOK_TCPSETMSS, 323 324 TOK_SKIPACTION, 325 }; 326 327 /* 328 * the following macro returns an error message if we run out of 329 * arguments. 330 */ 331 #define NEED(_p, msg) {if (!_p) errx(EX_USAGE, msg);} 332 #define NEED1(msg) {if (!(*av)) errx(EX_USAGE, msg);} 333 334 struct buf_pr { 335 char *buf; /* allocated buffer */ 336 char *ptr; /* current pointer */ 337 size_t size; /* total buffer size */ 338 size_t avail; /* available storage */ 339 size_t needed; /* length needed */ 340 }; 341 342 int pr_u64(struct buf_pr *bp, void *pd, int width); 343 int bp_alloc(struct buf_pr *b, size_t size); 344 void bp_free(struct buf_pr *b); 345 int bprintf(struct buf_pr *b, const char *format, ...); 346 347 348 /* memory allocation support */ 349 void *safe_calloc(size_t number, size_t size); 350 void *safe_realloc(void *ptr, size_t size); 351 352 /* string comparison functions used for historical compatibility */ 353 int _substrcmp(const char *str1, const char* str2); 354 int _substrcmp2(const char *str1, const char* str2, const char* str3); 355 int stringnum_cmp(const char *a, const char *b); 356 357 /* utility functions */ 358 int match_token(struct _s_x *table, const char *string); 359 int match_token_relaxed(struct _s_x *table, const char *string); 360 int get_token(struct _s_x *table, const char *string, const char *errbase); 361 char const *match_value(struct _s_x *p, int value); 362 size_t concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 363 const char *delimiter); 364 int fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 365 uint32_t *clear); 366 void print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set); 367 368 struct _ip_fw3_opheader; 369 int do_cmd(int optname, void *optval, uintptr_t optlen); 370 int do_set3(int optname, struct _ip_fw3_opheader *op3, size_t optlen); 371 int do_get3(int optname, struct _ip_fw3_opheader *op3, size_t *optlen); 372 373 struct in6_addr; 374 void n2mask(struct in6_addr *mask, int n); 375 int contigmask(const uint8_t *p, int len); 376 377 /* 378 * Forward declarations to avoid include way too many headers. 379 * C does not allow duplicated typedefs, so we use the base struct 380 * that the typedef points to. 381 * Should the typedefs use a different type, the compiler will 382 * still detect the change when compiling the body of the 383 * functions involved, so we do not lose error checking. 384 */ 385 struct _ipfw_insn; 386 struct _ipfw_insn_altq; 387 struct _ipfw_insn_u32; 388 struct _ipfw_insn_ip6; 389 struct _ipfw_insn_icmp6; 390 391 /* 392 * The reserved set numer. This is a constant in ip_fw.h 393 * but we store it in a variable so other files do not depend 394 * in that header just for one constant. 395 */ 396 extern int resvd_set_number; 397 398 /* first-level command handlers */ 399 void ipfw_add(char *av[]); 400 void ipfw_show_nat(int ac, char **av); 401 int ipfw_delete_nat(int i); 402 void ipfw_config_pipe(int ac, char **av); 403 void ipfw_config_nat(int ac, char **av); 404 void ipfw_sets_handler(char *av[]); 405 void ipfw_table_handler(int ac, char *av[]); 406 void ipfw_sysctl_handler(char *av[], int which); 407 void ipfw_delete(char *av[]); 408 void ipfw_flush(int force); 409 void ipfw_zero(int ac, char *av[], int optname); 410 void ipfw_list(int ac, char *av[], int show_counters); 411 void ipfw_internal_handler(int ac, char *av[]); 412 void ipfw_nat64clat_handler(int ac, char *av[]); 413 void ipfw_nat64lsn_handler(int ac, char *av[]); 414 void ipfw_nat64stl_handler(int ac, char *av[]); 415 void ipfw_nptv6_handler(int ac, char *av[]); 416 int ipfw_check_object_name(const char *name); 417 int ipfw_check_nat64prefix(const struct in6_addr *prefix, int length); 418 419 #ifdef PF 420 /* altq.c */ 421 void altq_set_enabled(int enabled); 422 u_int32_t altq_name_to_qid(const char *name); 423 void print_altq_cmd(struct buf_pr *bp, const struct _ipfw_insn_altq *altqptr); 424 #else 425 #define NO_ALTQ 426 #endif 427 428 /* dummynet.c */ 429 void dummynet_list(int ac, char *av[], int show_counters); 430 void dummynet_flush(void); 431 int ipfw_delete_pipe(int pipe_or_queue, int n); 432 433 /* ipv6.c */ 434 void print_unreach6_code(struct buf_pr *bp, uint16_t code); 435 void print_ip6(struct buf_pr *bp, const struct _ipfw_insn_ip6 *cmd); 436 void print_flow6id(struct buf_pr *bp, const struct _ipfw_insn_u32 *cmd); 437 void print_icmp6types(struct buf_pr *bp, const struct _ipfw_insn_u32 *cmd); 438 void print_ext6hdr(struct buf_pr *bp, const struct _ipfw_insn *cmd); 439 440 struct tidx; 441 struct _ipfw_insn *add_srcip6(struct _ipfw_insn *cmd, char *av, int cblen, 442 struct tidx *tstate); 443 struct _ipfw_insn *add_dstip6(struct _ipfw_insn *cmd, char *av, int cblen, 444 struct tidx *tstate); 445 446 void fill_flow6(struct _ipfw_insn_u32 *cmd, char *av, int cblen); 447 void fill_unreach6_code(u_short *codep, char *str); 448 void fill_icmp6types(struct _ipfw_insn_icmp6 *cmd, char *av, int cblen); 449 int fill_ext6hdr(struct _ipfw_insn *cmd, char *av); 450 451 /* ipfw2.c */ 452 void bp_flush(struct buf_pr *b); 453 void fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 454 struct tidx *tstate); 455 456 /* tables.c */ 457 struct _ipfw_obj_ctlv; 458 struct _ipfw_obj_ntlv; 459 int table_check_name(const char *tablename); 460 void ipfw_list_ta(int ac, char *av[]); 461 void ipfw_list_values(int ac, char *av[]); 462 void table_fill_ntlv(struct _ipfw_obj_ntlv *ntlv, const char *name, 463 uint8_t set, uint16_t uidx); 464 465