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 /* 24 * Options that can be set on the command line. 25 * When reading commands from a file, a subset of the options can also 26 * be applied globally by specifying them before the file name. 27 * After that, each line can contain its own option that changes 28 * the global value. 29 * XXX The context is not restored after each line. 30 */ 31 32 struct cmdline_opts { 33 /* boolean options: */ 34 int do_value_as_ip; /* show table value as IP */ 35 int do_resolv; /* try to resolve all ip to names */ 36 int do_time; /* Show time stamps */ 37 int do_quiet; /* Be quiet in add and flush */ 38 int do_pipe; /* this cmd refers to a pipe/queue/sched */ 39 int do_nat; /* this cmd refers to a nat config */ 40 int do_dynamic; /* display dynamic rules */ 41 int do_expired; /* display expired dynamic rules */ 42 int do_compact; /* show rules in compact mode */ 43 int do_force; /* do not ask for confirmation */ 44 int show_sets; /* display the set each rule belongs to */ 45 int test_only; /* only check syntax */ 46 int comment_only; /* only print action and comment */ 47 int verbose; /* be verbose on some commands */ 48 49 /* The options below can have multiple values. */ 50 51 int do_sort; /* field to sort results (0 = no) */ 52 /* valid fields are 1 and above */ 53 54 int use_set; /* work with specified set number */ 55 /* 0 means all sets, otherwise apply to set use_set - 1 */ 56 57 }; 58 59 extern struct cmdline_opts co; 60 61 /* 62 * _s_x is a structure that stores a string <-> token pairs, used in 63 * various places in the parser. Entries are stored in arrays, 64 * with an entry with s=NULL as terminator. 65 * The search routines are match_token() and match_value(). 66 * Often, an element with x=0 contains an error string. 67 * 68 */ 69 struct _s_x { 70 char const *s; 71 int x; 72 }; 73 74 extern struct _s_x f_ipdscp[]; 75 76 enum tokens { 77 TOK_NULL=0, 78 79 TOK_OR, 80 TOK_NOT, 81 TOK_STARTBRACE, 82 TOK_ENDBRACE, 83 84 TOK_ABORT6, 85 TOK_ABORT, 86 TOK_ACCEPT, 87 TOK_COUNT, 88 TOK_EACTION, 89 TOK_PIPE, 90 TOK_LINK, 91 TOK_QUEUE, 92 TOK_FLOWSET, 93 TOK_SCHED, 94 TOK_DIVERT, 95 TOK_TEE, 96 TOK_NETGRAPH, 97 TOK_NGTEE, 98 TOK_FORWARD, 99 TOK_SKIPTO, 100 TOK_DENY, 101 TOK_REJECT, 102 TOK_RESET, 103 TOK_UNREACH, 104 TOK_CHECKSTATE, 105 TOK_NAT, 106 TOK_REASS, 107 TOK_CALL, 108 TOK_RETURN, 109 110 TOK_ALTQ, 111 TOK_LOG, 112 TOK_TAG, 113 TOK_UNTAG, 114 115 TOK_TAGGED, 116 TOK_UID, 117 TOK_GID, 118 TOK_JAIL, 119 TOK_IN, 120 TOK_LIMIT, 121 TOK_KEEPSTATE, 122 TOK_LAYER2, 123 TOK_OUT, 124 TOK_DIVERTED, 125 TOK_DIVERTEDLOOPBACK, 126 TOK_DIVERTEDOUTPUT, 127 TOK_XMIT, 128 TOK_RECV, 129 TOK_VIA, 130 TOK_FRAG, 131 TOK_IPOPTS, 132 TOK_IPLEN, 133 TOK_IPID, 134 TOK_IPPRECEDENCE, 135 TOK_DSCP, 136 TOK_IPTOS, 137 TOK_IPTTL, 138 TOK_IPVER, 139 TOK_ESTAB, 140 TOK_SETUP, 141 TOK_TCPDATALEN, 142 TOK_TCPFLAGS, 143 TOK_TCPOPTS, 144 TOK_TCPSEQ, 145 TOK_TCPACK, 146 TOK_TCPWIN, 147 TOK_ICMPTYPES, 148 TOK_MAC, 149 TOK_MACTYPE, 150 TOK_VERREVPATH, 151 TOK_VERSRCREACH, 152 TOK_ANTISPOOF, 153 TOK_IPSEC, 154 TOK_COMMENT, 155 156 TOK_PLR, 157 TOK_NOERROR, 158 TOK_BUCKETS, 159 TOK_DSTIP, 160 TOK_SRCIP, 161 TOK_DSTPORT, 162 TOK_SRCPORT, 163 TOK_ALL, 164 TOK_MASK, 165 TOK_FLOW_MASK, 166 TOK_SCHED_MASK, 167 TOK_BW, 168 TOK_DELAY, 169 TOK_PROFILE, 170 TOK_BURST, 171 TOK_RED, 172 TOK_GRED, 173 TOK_ECN, 174 TOK_DROPTAIL, 175 TOK_PROTO, 176 #ifdef NEW_AQM 177 /* AQM tokens*/ 178 TOK_NO_ECN, 179 TOK_CODEL, 180 TOK_FQ_CODEL, 181 TOK_TARGET, 182 TOK_INTERVAL, 183 TOK_FLOWS, 184 TOK_QUANTUM, 185 186 TOK_PIE, 187 TOK_FQ_PIE, 188 TOK_TUPDATE, 189 TOK_MAX_BURST, 190 TOK_MAX_ECNTH, 191 TOK_ALPHA, 192 TOK_BETA, 193 TOK_CAPDROP, 194 TOK_NO_CAPDROP, 195 TOK_ONOFF, 196 TOK_DRE, 197 TOK_TS, 198 TOK_DERAND, 199 TOK_NO_DERAND, 200 #endif 201 /* dummynet tokens */ 202 TOK_WEIGHT, 203 TOK_LMAX, 204 TOK_PRI, 205 TOK_TYPE, 206 TOK_SLOTSIZE, 207 208 TOK_IP, 209 TOK_IF, 210 TOK_ALOG, 211 TOK_DENY_INC, 212 TOK_SAME_PORTS, 213 TOK_UNREG_ONLY, 214 TOK_SKIP_GLOBAL, 215 TOK_RESET_ADDR, 216 TOK_ALIAS_REV, 217 TOK_PROXY_ONLY, 218 TOK_REDIR_ADDR, 219 TOK_REDIR_PORT, 220 TOK_REDIR_PROTO, 221 222 TOK_IPV6, 223 TOK_FLOWID, 224 TOK_ICMP6TYPES, 225 TOK_EXT6HDR, 226 TOK_DSTIP6, 227 TOK_SRCIP6, 228 229 TOK_IPV4, 230 TOK_UNREACH6, 231 TOK_RESET6, 232 233 TOK_FIB, 234 TOK_SETFIB, 235 TOK_LOOKUP, 236 TOK_SOCKARG, 237 TOK_SETDSCP, 238 TOK_FLOW, 239 TOK_IFLIST, 240 /* Table tokens */ 241 TOK_CREATE, 242 TOK_DESTROY, 243 TOK_LIST, 244 TOK_INFO, 245 TOK_DETAIL, 246 TOK_MODIFY, 247 TOK_FLUSH, 248 TOK_SWAP, 249 TOK_ADD, 250 TOK_DEL, 251 TOK_VALTYPE, 252 TOK_ALGO, 253 TOK_TALIST, 254 TOK_ATOMIC, 255 TOK_LOCK, 256 TOK_UNLOCK, 257 TOK_VLIST, 258 TOK_OLIST, 259 260 /* NAT64 tokens */ 261 TOK_NAT64STL, 262 TOK_NAT64LSN, 263 TOK_STATS, 264 TOK_STATES, 265 TOK_CONFIG, 266 TOK_TABLE4, 267 TOK_TABLE6, 268 TOK_PREFIX4, 269 TOK_PREFIX6, 270 TOK_AGG_LEN, 271 TOK_AGG_COUNT, 272 TOK_MAX_PORTS, 273 TOK_JMAXLEN, 274 TOK_PORT_RANGE, 275 TOK_HOST_DEL_AGE, 276 TOK_PG_DEL_AGE, 277 TOK_TCP_SYN_AGE, 278 TOK_TCP_CLOSE_AGE, 279 TOK_TCP_EST_AGE, 280 TOK_UDP_AGE, 281 TOK_ICMP_AGE, 282 TOK_LOGOFF, 283 284 /* NPTv6 tokens */ 285 TOK_NPTV6, 286 TOK_INTPREFIX, 287 TOK_EXTPREFIX, 288 TOK_PREFIXLEN, 289 290 TOK_TCPSETMSS, 291 }; 292 293 /* 294 * the following macro returns an error message if we run out of 295 * arguments. 296 */ 297 #define NEED(_p, msg) {if (!_p) errx(EX_USAGE, msg);} 298 #define NEED1(msg) {if (!(*av)) errx(EX_USAGE, msg);} 299 300 struct buf_pr { 301 char *buf; /* allocated buffer */ 302 char *ptr; /* current pointer */ 303 size_t size; /* total buffer size */ 304 size_t avail; /* available storage */ 305 size_t needed; /* length needed */ 306 }; 307 308 int pr_u64(struct buf_pr *bp, uint64_t *pd, int width); 309 int bp_alloc(struct buf_pr *b, size_t size); 310 void bp_free(struct buf_pr *b); 311 int bprintf(struct buf_pr *b, char *format, ...); 312 313 314 /* memory allocation support */ 315 void *safe_calloc(size_t number, size_t size); 316 void *safe_realloc(void *ptr, size_t size); 317 318 /* string comparison functions used for historical compatibility */ 319 int _substrcmp(const char *str1, const char* str2); 320 int _substrcmp2(const char *str1, const char* str2, const char* str3); 321 int stringnum_cmp(const char *a, const char *b); 322 323 /* utility functions */ 324 int match_token(struct _s_x *table, const char *string); 325 int match_token_relaxed(struct _s_x *table, const char *string); 326 int get_token(struct _s_x *table, const char *string, const char *errbase); 327 char const *match_value(struct _s_x *p, int value); 328 size_t concat_tokens(char *buf, size_t bufsize, struct _s_x *table, 329 char *delimiter); 330 int fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 331 uint32_t *clear); 332 void print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set); 333 334 struct _ip_fw3_opheader; 335 int do_cmd(int optname, void *optval, uintptr_t optlen); 336 int do_set3(int optname, struct _ip_fw3_opheader *op3, size_t optlen); 337 int do_get3(int optname, struct _ip_fw3_opheader *op3, size_t *optlen); 338 339 struct in6_addr; 340 void n2mask(struct in6_addr *mask, int n); 341 int contigmask(uint8_t *p, int len); 342 343 /* 344 * Forward declarations to avoid include way too many headers. 345 * C does not allow duplicated typedefs, so we use the base struct 346 * that the typedef points to. 347 * Should the typedefs use a different type, the compiler will 348 * still detect the change when compiling the body of the 349 * functions involved, so we do not lose error checking. 350 */ 351 struct _ipfw_insn; 352 struct _ipfw_insn_altq; 353 struct _ipfw_insn_u32; 354 struct _ipfw_insn_ip6; 355 struct _ipfw_insn_icmp6; 356 357 /* 358 * The reserved set numer. This is a constant in ip_fw.h 359 * but we store it in a variable so other files do not depend 360 * in that header just for one constant. 361 */ 362 extern int resvd_set_number; 363 364 /* first-level command handlers */ 365 void ipfw_add(char *av[]); 366 void ipfw_show_nat(int ac, char **av); 367 void ipfw_config_pipe(int ac, char **av); 368 void ipfw_config_nat(int ac, char **av); 369 void ipfw_sets_handler(char *av[]); 370 void ipfw_table_handler(int ac, char *av[]); 371 void ipfw_sysctl_handler(char *av[], int which); 372 void ipfw_delete(char *av[]); 373 void ipfw_flush(int force); 374 void ipfw_zero(int ac, char *av[], int optname); 375 void ipfw_list(int ac, char *av[], int show_counters); 376 void ipfw_internal_handler(int ac, char *av[]); 377 void ipfw_nat64lsn_handler(int ac, char *av[]); 378 void ipfw_nat64stl_handler(int ac, char *av[]); 379 void ipfw_nptv6_handler(int ac, char *av[]); 380 int ipfw_check_object_name(const char *name); 381 382 #ifdef PF 383 /* altq.c */ 384 void altq_set_enabled(int enabled); 385 u_int32_t altq_name_to_qid(const char *name); 386 void print_altq_cmd(struct buf_pr *bp, struct _ipfw_insn_altq *altqptr); 387 #else 388 #define NO_ALTQ 389 #endif 390 391 /* dummynet.c */ 392 void dummynet_list(int ac, char *av[], int show_counters); 393 void dummynet_flush(void); 394 int ipfw_delete_pipe(int pipe_or_queue, int n); 395 396 /* ipv6.c */ 397 void print_unreach6_code(struct buf_pr *bp, uint16_t code); 398 void print_ip6(struct buf_pr *bp, struct _ipfw_insn_ip6 *cmd, char const *s); 399 void print_flow6id(struct buf_pr *bp, struct _ipfw_insn_u32 *cmd); 400 void print_icmp6types(struct buf_pr *bp, struct _ipfw_insn_u32 *cmd); 401 void print_ext6hdr(struct buf_pr *bp, struct _ipfw_insn *cmd ); 402 403 struct tidx; 404 struct _ipfw_insn *add_srcip6(struct _ipfw_insn *cmd, char *av, int cblen, 405 struct tidx *tstate); 406 struct _ipfw_insn *add_dstip6(struct _ipfw_insn *cmd, char *av, int cblen, 407 struct tidx *tstate); 408 409 void fill_flow6(struct _ipfw_insn_u32 *cmd, char *av, int cblen); 410 void fill_unreach6_code(u_short *codep, char *str); 411 void fill_icmp6types(struct _ipfw_insn_icmp6 *cmd, char *av, int cblen); 412 int fill_ext6hdr(struct _ipfw_insn *cmd, char *av); 413 414 /* ipfw2.c */ 415 void bp_flush(struct buf_pr *b); 416 void fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 417 struct tidx *tstate); 418 419 /* tables.c */ 420 struct _ipfw_obj_ctlv; 421 struct _ipfw_obj_ntlv; 422 int table_check_name(const char *tablename); 423 void ipfw_list_ta(int ac, char *av[]); 424 void ipfw_list_values(int ac, char *av[]); 425 void table_fill_ntlv(struct _ipfw_obj_ntlv *ntlv, const char *name, 426 uint8_t set, uint16_t uidx); 427 428