1 /* 2 * smallapp/unbound-control.c - remote control utility for unbound. 3 * 4 * Copyright (c) 2008, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * The remote control utility contacts the unbound server over ssl and 40 * sends the command, receives the answer, and displays the result 41 * from the commandline. 42 */ 43 44 #include "config.h" 45 #ifdef HAVE_GETOPT_H 46 #include <getopt.h> 47 #endif 48 #ifdef HAVE_OPENSSL_SSL_H 49 #include <openssl/ssl.h> 50 #endif 51 #ifdef HAVE_OPENSSL_ERR_H 52 #include <openssl/err.h> 53 #endif 54 #ifdef HAVE_OPENSSL_RAND_H 55 #include <openssl/rand.h> 56 #endif 57 #include "util/log.h" 58 #include "util/config_file.h" 59 #include "util/locks.h" 60 #include "util/net_help.h" 61 #include "util/shm_side/shm_main.h" 62 #include "util/timeval_func.h" 63 #include "daemon/stats.h" 64 #include "sldns/wire2str.h" 65 #include "sldns/pkthdr.h" 66 #include "services/rpz.h" 67 #include "services/listen_dnsport.h" 68 69 #ifdef HAVE_SYS_IPC_H 70 #include "sys/ipc.h" 71 #endif 72 #ifdef HAVE_SYS_SHM_H 73 #include "sys/shm.h" 74 #endif 75 #ifdef HAVE_SYS_UN_H 76 #include <sys/un.h> 77 #endif 78 79 #ifdef HAVE_TARGETCONDITIONALS_H 80 #include <TargetConditionals.h> 81 #endif 82 83 static void usage(void) ATTR_NORETURN; 84 static void ssl_err(const char* s) ATTR_NORETURN; 85 static void ssl_path_err(const char* s, const char *path) ATTR_NORETURN; 86 87 /** timeout to wait for connection over stream, in msec */ 88 #define UNBOUND_CONTROL_CONNECT_TIMEOUT 5000 89 90 /** Give unbound-control usage, and exit (1). */ 91 static void 92 usage(void) 93 { 94 printf("Usage: local-unbound-control [options] command\n"); 95 printf(" Remote control utility for unbound server.\n"); 96 printf("Options:\n"); 97 printf(" -c file config file, default is %s\n", CONFIGFILE); 98 printf(" -s ip[@port] server address, if omitted config is used.\n"); 99 printf(" -q quiet (don't print anything if it works ok).\n"); 100 printf(" -h show this usage help.\n"); 101 printf("Commands:\n"); 102 printf(" start start server; runs unbound(8)\n"); 103 printf(" stop stops the server\n"); 104 printf(" reload reloads the server\n"); 105 printf(" (this flushes data, stats, requestlist)\n"); 106 printf(" reload_keep_cache reloads the server but tries to\n"); 107 printf(" keep the RRset and message cache\n"); 108 printf(" if (re)configuration allows for it.\n"); 109 printf(" That means the caches sizes and\n"); 110 printf(" the number of threads must not\n"); 111 printf(" change between reloads.\n"); 112 printf(" stats print statistics\n"); 113 printf(" stats_noreset peek at statistics\n"); 114 #ifdef HAVE_SHMGET 115 printf(" stats_shm print statistics using shm\n"); 116 #endif 117 printf(" status display status of server\n"); 118 printf(" verbosity <number> change logging detail\n"); 119 printf(" log_reopen close and open the logfile\n"); 120 printf(" local_zone <name> <type> add new local zone\n"); 121 printf(" local_zone_remove <name> remove local zone and its contents\n"); 122 printf(" local_data <RR data...> add local data, for example\n"); 123 printf(" local_data www.example.com A 192.0.2.1\n"); 124 printf(" local_data_remove <name> remove local RR data from name\n"); 125 printf(" local_zones, local_zones_remove, local_datas, local_datas_remove\n"); 126 printf(" same, but read list from stdin\n"); 127 printf(" (one entry per line).\n"); 128 printf(" dump_cache print cache to stdout\n"); 129 printf(" load_cache load cache from stdin\n"); 130 printf(" lookup <name> print nameservers for name\n"); 131 printf(" flush <name> flushes common types for name from cache\n"); 132 printf(" types: A, AAAA, MX, PTR, NS,\n"); 133 printf(" SOA, CNAME, DNAME, SRV, NAPTR\n"); 134 printf(" flush_type <name> <type> flush name, type from cache\n"); 135 printf(" flush_zone <name> flush everything at or under name\n"); 136 printf(" from rr and dnssec caches\n"); 137 printf(" flush_bogus flush all bogus data\n"); 138 printf(" flush_negative flush all negative data\n"); 139 printf(" flush_stats flush statistics, make zero\n"); 140 printf(" flush_requestlist drop queries that are worked on\n"); 141 printf(" dump_requestlist show what is worked on by first thread\n"); 142 printf(" flush_infra [all | ip] remove ping, edns for one IP or all\n"); 143 printf(" dump_infra show ping and edns entries\n"); 144 printf(" set_option opt: val set option to value, no reload\n"); 145 printf(" get_option opt get option value\n"); 146 printf(" list_stubs list stub-zones and root hints in use\n"); 147 printf(" list_forwards list forward-zones in use\n"); 148 printf(" list_insecure list domain-insecure zones\n"); 149 printf(" list_local_zones list local-zones in use\n"); 150 printf(" list_local_data list local-data RRs in use\n"); 151 printf(" insecure_add zone add domain-insecure zone\n"); 152 printf(" insecure_remove zone remove domain-insecure zone\n"); 153 printf(" forward_add [+it] zone addr.. add forward-zone with servers\n"); 154 printf(" forward_remove [+i] zone remove forward zone\n"); 155 printf(" stub_add [+ipt] zone addr.. add stub-zone with servers\n"); 156 printf(" stub_remove [+i] zone remove stub zone\n"); 157 printf(" +i also do dnssec insecure point\n"); 158 printf(" +p set stub to use priming\n"); 159 printf(" +t set to use tls upstream\n"); 160 printf(" forward [off | addr ...] without arg show forward setup\n"); 161 printf(" or off to turn off root forwarding\n"); 162 printf(" or give list of ip addresses\n"); 163 printf(" ratelimit_list [+a] list ratelimited domains\n"); 164 printf(" ip_ratelimit_list [+a] list ratelimited ip addresses\n"); 165 printf(" +a list all, also not ratelimited\n"); 166 printf(" list_auth_zones list auth zones (includes RPZ zones)\n"); 167 printf(" auth_zone_reload zone reload auth zone (or RPZ zone) from zonefile\n"); 168 printf(" auth_zone_transfer zone transfer auth zone (or RPZ zone) from master\n"); 169 printf(" view_list_local_zones view list local-zones in view\n"); 170 printf(" view_list_local_data view list local-data RRs in view\n"); 171 printf(" view_local_zone view name type add local-zone in view\n"); 172 printf(" view_local_zone_remove view name remove local-zone in view\n"); 173 printf(" view_local_data view RR... add local-data in view\n"); 174 printf(" view_local_datas view add list of local-data to view\n"); 175 printf(" one entry per line read from stdin\n"); 176 printf(" view_local_data_remove view name remove local-data in view\n"); 177 printf(" view_local_datas_remove view remove list of local-data from view\n"); 178 printf(" one entry per line read from stdin\n"); 179 printf(" rpz_enable zone Enable the RPZ zone if it had previously\n"); 180 printf(" been disabled\n"); 181 printf(" rpz_disable zone Disable the RPZ zone\n"); 182 printf("Version %s\n", PACKAGE_VERSION); 183 printf("BSD licensed, see LICENSE in source package for details.\n"); 184 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 185 exit(1); 186 } 187 188 #ifdef HAVE_SHMGET 189 /** what to put on statistics lines between var and value, ": " or "=" */ 190 #define SQ "=" 191 /** print unsigned long stats value */ 192 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var)); 193 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var)); 194 #define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var)); 195 #define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 196 (long long)var.tv_sec, (int)var.tv_usec); 197 #define PR_STATSTIME(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 198 (long long)var ## _sec, (int)var ## _usec); 199 #define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var)); 200 201 /** print stat block */ 202 static void pr_stats(const char* nm, struct ub_stats_info* s) 203 { 204 struct timeval sumwait, avg; 205 PR_UL_NM("num.queries", s->svr.num_queries); 206 PR_UL_NM("num.queries_ip_ratelimited", 207 s->svr.num_queries_ip_ratelimited); 208 PR_UL_NM("num.queries_cookie_valid", 209 s->svr.num_queries_cookie_valid); 210 PR_UL_NM("num.queries_cookie_client", 211 s->svr.num_queries_cookie_client); 212 PR_UL_NM("num.queries_cookie_invalid", 213 s->svr.num_queries_cookie_invalid); 214 PR_UL_NM("num.cachehits", 215 s->svr.num_queries - s->svr.num_queries_missed_cache); 216 PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache); 217 PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch); 218 PR_UL_NM("num.queries_timed_out", s->svr.num_queries_timed_out); 219 PR_UL_NM("query.queue_time_us.max", s->svr.max_query_time_us); 220 PR_UL_NM("num.expired", s->svr.ans_expired); 221 PR_UL_NM("num.recursivereplies", s->mesh_replies_sent); 222 #ifdef USE_DNSCRYPT 223 PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted); 224 PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert); 225 PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext); 226 PR_UL_NM("num.dnscrypt.malformed", 227 s->svr.num_query_dnscrypt_crypted_malformed); 228 #endif /* USE_DNSCRYPT */ 229 printf("%s.requestlist.avg"SQ"%g\n", nm, 230 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)? 231 (double)s->svr.sum_query_list_size/ 232 (double)(s->svr.num_queries_missed_cache+ 233 s->svr.num_queries_prefetch) : 0.0); 234 PR_UL_NM("requestlist.max", s->svr.max_query_list_size); 235 PR_UL_NM("requestlist.overwritten", s->mesh_jostled); 236 PR_UL_NM("requestlist.exceeded", s->mesh_dropped); 237 PR_UL_NM("requestlist.current.all", s->mesh_num_states); 238 PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states); 239 #ifndef S_SPLINT_S 240 sumwait.tv_sec = s->mesh_replies_sum_wait_sec; 241 sumwait.tv_usec = s->mesh_replies_sum_wait_usec; 242 #endif 243 timeval_divide(&avg, &sumwait, s->mesh_replies_sent); 244 printf("%s.", nm); 245 PR_TIMEVAL("recursion.time.avg", avg); 246 printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median); 247 PR_UL_NM("tcpusage", s->svr.tcp_accept_usage); 248 } 249 250 /** print uptime */ 251 static void print_uptime(struct ub_shm_stat_info* shm_stat) 252 { 253 PR_STATSTIME("time.now", shm_stat->time.now); 254 PR_STATSTIME("time.up", shm_stat->time.up); 255 PR_STATSTIME("time.elapsed", shm_stat->time.elapsed); 256 } 257 258 /** print memory usage */ 259 static void print_mem(struct ub_shm_stat_info* shm_stat, 260 struct ub_stats_info* s) 261 { 262 PR_LL("mem.cache.rrset", shm_stat->mem.rrset); 263 PR_LL("mem.cache.message", shm_stat->mem.msg); 264 PR_LL("mem.mod.iterator", shm_stat->mem.iter); 265 PR_LL("mem.mod.validator", shm_stat->mem.val); 266 PR_LL("mem.mod.respip", shm_stat->mem.respip); 267 #ifdef CLIENT_SUBNET 268 PR_LL("mem.mod.subnet", shm_stat->mem.subnet); 269 #endif 270 #ifdef USE_IPSECMOD 271 PR_LL("mem.mod.ipsecmod", shm_stat->mem.ipsecmod); 272 #endif 273 #ifdef WITH_DYNLIBMODULE 274 PR_LL("mem.mod.dynlib", shm_stat->mem.dynlib); 275 #endif 276 #ifdef USE_DNSCRYPT 277 PR_LL("mem.cache.dnscrypt_shared_secret", 278 shm_stat->mem.dnscrypt_shared_secret); 279 PR_LL("mem.cache.dnscrypt_nonce", 280 shm_stat->mem.dnscrypt_nonce); 281 #endif 282 PR_LL("mem.streamwait", s->svr.mem_stream_wait); 283 PR_LL("mem.http.query_buffer", s->svr.mem_http2_query_buffer); 284 PR_LL("mem.http.response_buffer", s->svr.mem_http2_response_buffer); 285 } 286 287 /** print histogram */ 288 static void print_hist(struct ub_stats_info* s) 289 { 290 struct timehist* hist; 291 size_t i; 292 hist = timehist_setup(); 293 if(!hist) 294 fatal_exit("out of memory"); 295 timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST); 296 for(i=0; i<hist->num; i++) { 297 printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n", 298 (int)hist->buckets[i].lower.tv_sec, 299 (int)hist->buckets[i].lower.tv_usec, 300 (int)hist->buckets[i].upper.tv_sec, 301 (int)hist->buckets[i].upper.tv_usec, 302 (unsigned long)hist->buckets[i].count); 303 } 304 timehist_delete(hist); 305 } 306 307 /** print extended */ 308 static void print_extended(struct ub_stats_info* s, int inhibit_zero) 309 { 310 int i; 311 char nm[16]; 312 313 /* TYPE */ 314 for(i=0; i<UB_STATS_QTYPE_NUM; i++) { 315 if(inhibit_zero && s->svr.qtype[i] == 0) 316 continue; 317 sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm)); 318 PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]); 319 } 320 if(!inhibit_zero || s->svr.qtype_big) { 321 PR_UL("num.query.type.other", s->svr.qtype_big); 322 } 323 324 /* CLASS */ 325 for(i=0; i<UB_STATS_QCLASS_NUM; i++) { 326 if(inhibit_zero && s->svr.qclass[i] == 0) 327 continue; 328 sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm)); 329 PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]); 330 } 331 if(!inhibit_zero || s->svr.qclass_big) { 332 PR_UL("num.query.class.other", s->svr.qclass_big); 333 } 334 335 /* OPCODE */ 336 for(i=0; i<UB_STATS_OPCODE_NUM; i++) { 337 if(inhibit_zero && s->svr.qopcode[i] == 0) 338 continue; 339 sldns_wire2str_opcode_buf(i, nm, sizeof(nm)); 340 PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]); 341 } 342 343 /* transport */ 344 PR_UL("num.query.tcp", s->svr.qtcp); 345 PR_UL("num.query.tcpout", s->svr.qtcp_outgoing); 346 PR_UL("num.query.udpout", s->svr.qudp_outgoing); 347 PR_UL("num.query.tls", s->svr.qtls); 348 PR_UL("num.query.tls_resume", s->svr.qtls_resume); 349 PR_UL("num.query.ipv6", s->svr.qipv6); 350 PR_UL("num.query.https", s->svr.qhttps); 351 352 /* flags */ 353 PR_UL("num.query.flags.QR", s->svr.qbit_QR); 354 PR_UL("num.query.flags.AA", s->svr.qbit_AA); 355 PR_UL("num.query.flags.TC", s->svr.qbit_TC); 356 PR_UL("num.query.flags.RD", s->svr.qbit_RD); 357 PR_UL("num.query.flags.RA", s->svr.qbit_RA); 358 PR_UL("num.query.flags.Z", s->svr.qbit_Z); 359 PR_UL("num.query.flags.AD", s->svr.qbit_AD); 360 PR_UL("num.query.flags.CD", s->svr.qbit_CD); 361 PR_UL("num.query.edns.present", s->svr.qEDNS); 362 PR_UL("num.query.edns.DO", s->svr.qEDNS_DO); 363 364 /* RCODE */ 365 for(i=0; i<UB_STATS_RCODE_NUM; i++) { 366 /* Always include RCODEs 0-5 */ 367 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0) 368 continue; 369 sldns_wire2str_rcode_buf(i, nm, sizeof(nm)); 370 PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]); 371 } 372 if(!inhibit_zero || s->svr.ans_rcode_nodata) { 373 PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata); 374 } 375 /* iteration */ 376 PR_UL("num.query.ratelimited", s->svr.queries_ratelimited); 377 /* validation */ 378 PR_UL("num.answer.secure", s->svr.ans_secure); 379 PR_UL("num.answer.bogus", s->svr.ans_bogus); 380 PR_UL("num.rrset.bogus", s->svr.rrset_bogus); 381 PR_UL("num.query.aggressive.NOERROR", s->svr.num_neg_cache_noerror); 382 PR_UL("num.query.aggressive.NXDOMAIN", s->svr.num_neg_cache_nxdomain); 383 /* threat detection */ 384 PR_UL("unwanted.queries", s->svr.unwanted_queries); 385 PR_UL("unwanted.replies", s->svr.unwanted_replies); 386 /* cache counts */ 387 PR_UL("msg.cache.count", s->svr.msg_cache_count); 388 PR_UL("rrset.cache.count", s->svr.rrset_cache_count); 389 PR_UL("infra.cache.count", s->svr.infra_cache_count); 390 PR_UL("key.cache.count", s->svr.key_cache_count); 391 /* max collisions */ 392 PR_UL("msg.cache.max_collisions", s->svr.msg_cache_max_collisions); 393 PR_UL("rrset.cache.max_collisions", s->svr.rrset_cache_max_collisions); 394 /* applied RPZ actions */ 395 for(i=0; i<UB_STATS_RPZ_ACTION_NUM; i++) { 396 if(i == RPZ_NO_OVERRIDE_ACTION) 397 continue; 398 if(inhibit_zero && s->svr.rpz_action[i] == 0) 399 continue; 400 PR_UL_SUB("num.rpz.action", rpz_action_to_string(i), s->svr.rpz_action[i]); 401 } 402 #ifdef USE_DNSCRYPT 403 PR_UL("dnscrypt_shared_secret.cache.count", 404 s->svr.shared_secret_cache_count); 405 PR_UL("num.query.dnscrypt.shared_secret.cachemiss", 406 s->svr.num_query_dnscrypt_secret_missed_cache); 407 PR_UL("dnscrypt_nonce.cache.count", s->svr.nonce_cache_count); 408 PR_UL("num.query.dnscrypt.replay", 409 s->svr.num_query_dnscrypt_replay); 410 #endif /* USE_DNSCRYPT */ 411 PR_UL("num.query.authzone.up", s->svr.num_query_authzone_up); 412 PR_UL("num.query.authzone.down", s->svr.num_query_authzone_down); 413 #ifdef CLIENT_SUBNET 414 PR_UL("num.query.subnet", s->svr.num_query_subnet); 415 PR_UL("num.query.subnet_cache", s->svr.num_query_subnet_cache); 416 #endif 417 #ifdef USE_CACHEDB 418 PR_UL("num.query.cachedb", s->svr.num_query_cachedb); 419 #endif 420 } 421 422 /** print statistics out of memory structures */ 423 static void do_stats_shm(struct config_file* cfg, struct ub_stats_info* stats, 424 struct ub_shm_stat_info* shm_stat) 425 { 426 int i; 427 char nm[32]; 428 for(i=0; i<cfg->num_threads; i++) { 429 snprintf(nm, sizeof(nm), "thread%d", i); 430 pr_stats(nm, &stats[i+1]); 431 } 432 pr_stats("total", &stats[0]); 433 print_uptime(shm_stat); 434 if(cfg->stat_extended) { 435 print_mem(shm_stat, &stats[0]); 436 print_hist(stats); 437 print_extended(stats, cfg->stat_inhibit_zero); 438 } 439 } 440 #endif /* HAVE_SHMGET */ 441 442 /** print statistics from shm memory segment */ 443 static void print_stats_shm(const char* cfgfile, int quiet) 444 { 445 #ifdef HAVE_SHMGET 446 struct config_file* cfg; 447 struct ub_stats_info* stats; 448 struct ub_shm_stat_info* shm_stat; 449 int id_ctl, id_arr; 450 /* read config */ 451 if(!(cfg = config_create())) 452 fatal_exit("out of memory"); 453 if(!config_read(cfg, cfgfile, NULL)) 454 fatal_exit("could not read config file"); 455 /* get shm segments */ 456 id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R); 457 if(id_ctl == -1) { 458 fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno)); 459 } 460 id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R); 461 if(id_arr == -1) { 462 fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno)); 463 } 464 shm_stat = (struct ub_shm_stat_info*)shmat(id_ctl, NULL, SHM_RDONLY); 465 if(shm_stat == (void*)-1) { 466 fatal_exit("shmat(%d): %s", id_ctl, strerror(errno)); 467 } 468 stats = (struct ub_stats_info*)shmat(id_arr, NULL, SHM_RDONLY); 469 if(stats == (void*)-1) { 470 fatal_exit("shmat(%d): %s", id_arr, strerror(errno)); 471 } 472 473 474 if(!quiet) { 475 /* print the stats */ 476 do_stats_shm(cfg, stats, shm_stat); 477 } 478 479 /* shutdown */ 480 shmdt(shm_stat); 481 shmdt(stats); 482 config_delete(cfg); 483 #else 484 (void)cfgfile; 485 (void)quiet; 486 #endif /* HAVE_SHMGET */ 487 } 488 489 /** exit with ssl error */ 490 static void ssl_err(const char* s) 491 { 492 fprintf(stderr, "error: %s\n", s); 493 ERR_print_errors_fp(stderr); 494 exit(1); 495 } 496 497 /** exit with ssl error related to a file path */ 498 static void ssl_path_err(const char* s, const char *path) 499 { 500 unsigned long err; 501 err = ERR_peek_error(); 502 if(ERR_GET_LIB(err) == ERR_LIB_SYS) { 503 fprintf(stderr, "error: %s\n%s: %s\n", 504 s, path, ERR_reason_error_string(err)); 505 exit(1); 506 } else { 507 ssl_err(s); 508 } 509 } 510 511 /** setup SSL context */ 512 static SSL_CTX* 513 setup_ctx(struct config_file* cfg) 514 { 515 char* s_cert=NULL, *c_key=NULL, *c_cert=NULL; 516 SSL_CTX* ctx; 517 518 if(!(options_remote_is_address(cfg) && cfg->control_use_cert)) 519 return NULL; 520 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1); 521 c_key = fname_after_chroot(cfg->control_key_file, cfg, 1); 522 c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1); 523 if(!s_cert || !c_key || !c_cert) 524 fatal_exit("out of memory"); 525 ctx = SSL_CTX_new(SSLv23_client_method()); 526 if(!ctx) 527 ssl_err("could not allocate SSL_CTX pointer"); 528 #if SSL_OP_NO_SSLv2 != 0 529 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 530 != SSL_OP_NO_SSLv2) 531 ssl_err("could not set SSL_OP_NO_SSLv2"); 532 #endif 533 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 534 != SSL_OP_NO_SSLv3) 535 ssl_err("could not set SSL_OP_NO_SSLv3"); 536 #if defined(SSL_OP_NO_RENEGOTIATION) 537 /* disable client renegotiation */ 538 if((SSL_CTX_set_options(ctx, SSL_OP_NO_RENEGOTIATION) & 539 SSL_OP_NO_RENEGOTIATION) != SSL_OP_NO_RENEGOTIATION) 540 ssl_err("could not set SSL_OP_NO_RENEGOTIATION"); 541 #endif 542 if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert)) 543 ssl_path_err("Error setting up SSL_CTX client cert", c_cert); 544 if(!SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM)) 545 ssl_path_err("Error setting up SSL_CTX client key", c_key); 546 if(!SSL_CTX_check_private_key(ctx)) 547 ssl_err("Error setting up SSL_CTX client key"); 548 if(SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1) 549 ssl_path_err("Error setting up SSL_CTX verify, server cert", 550 s_cert); 551 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 552 553 free(s_cert); 554 free(c_key); 555 free(c_cert); 556 return ctx; 557 } 558 559 /** check connect error */ 560 static void 561 checkconnecterr(int err, const char* svr, struct sockaddr_storage* addr, 562 socklen_t addrlen, int statuscmd, int useport) 563 { 564 #ifndef USE_WINSOCK 565 if(!useport) log_err("connect: %s for %s", strerror(err), svr); 566 else log_err_addr("connect", strerror(err), addr, addrlen); 567 if(err == ECONNREFUSED && statuscmd) { 568 printf("unbound is stopped\n"); 569 exit(3); 570 } 571 #else 572 int wsaerr = err; 573 if(!useport) log_err("connect: %s for %s", wsa_strerror(wsaerr), svr); 574 else log_err_addr("connect", wsa_strerror(wsaerr), addr, addrlen); 575 if(wsaerr == WSAECONNREFUSED && statuscmd) { 576 printf("unbound is stopped\n"); 577 exit(3); 578 } 579 #endif 580 exit(1); 581 } 582 583 /** contact the server with TCP connect */ 584 static int 585 contact_server(const char* svr, struct config_file* cfg, int statuscmd) 586 { 587 struct sockaddr_storage addr; 588 socklen_t addrlen; 589 int addrfamily = 0, proto = IPPROTO_TCP; 590 int fd, useport = 1; 591 char** rcif = NULL; 592 int num_rcif = 0; 593 /* use svr or the first config entry */ 594 if(!svr) { 595 if(cfg->control_ifs.first) { 596 struct sockaddr_storage addr2; 597 socklen_t addrlen2; 598 if(extstrtoaddr(cfg->control_ifs.first->str, &addr2, 599 &addrlen2, UNBOUND_DNS_PORT)) { 600 svr = cfg->control_ifs.first->str; 601 } else { 602 if(!resolve_interface_names(NULL, 0, 603 cfg->control_ifs.first, &rcif, 604 &num_rcif)) { 605 fatal_exit("could not resolve interface names"); 606 } 607 if(rcif == NULL || num_rcif == 0) { 608 fatal_exit("no control interfaces"); 609 } 610 svr = rcif[0]; 611 } 612 } else if(cfg->do_ip4) { 613 svr = "127.0.0.1"; 614 } else { 615 svr = "::1"; 616 } 617 /* config 0 addr (everything), means ask localhost */ 618 if(strcmp(svr, "0.0.0.0") == 0) 619 svr = "127.0.0.1"; 620 else if(strcmp(svr, "::0") == 0 || 621 strcmp(svr, "0::0") == 0 || 622 strcmp(svr, "0::") == 0 || 623 strcmp(svr, "::") == 0) 624 svr = "::1"; 625 } 626 if(strchr(svr, '@')) { 627 if(!extstrtoaddr(svr, &addr, &addrlen, UNBOUND_DNS_PORT)) 628 fatal_exit("could not parse IP@port: %s", svr); 629 #ifdef HAVE_SYS_UN_H 630 } else if(svr[0] == '/') { 631 struct sockaddr_un* usock = (struct sockaddr_un *) &addr; 632 usock->sun_family = AF_LOCAL; 633 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 634 usock->sun_len = (unsigned)sizeof(usock); 635 #endif 636 (void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path)); 637 addrlen = (socklen_t)sizeof(struct sockaddr_un); 638 addrfamily = AF_LOCAL; 639 useport = 0; 640 proto = 0; 641 #endif 642 } else { 643 if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen)) 644 fatal_exit("could not parse IP: %s", svr); 645 } 646 647 if(addrfamily == 0) 648 addrfamily = addr_is_ip6(&addr, addrlen)?PF_INET6:PF_INET; 649 fd = socket(addrfamily, SOCK_STREAM, proto); 650 if(fd == -1) { 651 fatal_exit("socket: %s", sock_strerror(errno)); 652 } 653 fd_set_nonblock(fd); 654 if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) { 655 #ifndef USE_WINSOCK 656 #ifdef EINPROGRESS 657 if(errno != EINPROGRESS) { 658 checkconnecterr(errno, svr, &addr, 659 addrlen, statuscmd, useport); 660 } 661 #endif 662 #else 663 if(WSAGetLastError() != WSAEINPROGRESS && 664 WSAGetLastError() != WSAEWOULDBLOCK) { 665 checkconnecterr(WSAGetLastError(), svr, &addr, 666 addrlen, statuscmd, useport); 667 } 668 #endif 669 } 670 while(1) { 671 fd_set rset, wset, eset; 672 struct timeval tv; 673 FD_ZERO(&rset); 674 FD_SET(FD_SET_T fd, &rset); 675 FD_ZERO(&wset); 676 FD_SET(FD_SET_T fd, &wset); 677 FD_ZERO(&eset); 678 FD_SET(FD_SET_T fd, &eset); 679 tv.tv_sec = UNBOUND_CONTROL_CONNECT_TIMEOUT/1000; 680 tv.tv_usec= (UNBOUND_CONTROL_CONNECT_TIMEOUT%1000)*1000; 681 if(select(fd+1, &rset, &wset, &eset, &tv) == -1) { 682 fatal_exit("select: %s", sock_strerror(errno)); 683 } 684 if(!FD_ISSET(fd, &rset) && !FD_ISSET(fd, &wset) && 685 !FD_ISSET(fd, &eset)) { 686 fatal_exit("timeout: could not connect to server"); 687 } else { 688 /* check nonblocking connect error */ 689 int error = 0; 690 socklen_t len = (socklen_t)sizeof(error); 691 if(getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&error, 692 &len) < 0) { 693 #ifndef USE_WINSOCK 694 error = errno; /* on solaris errno is error */ 695 #else 696 error = WSAGetLastError(); 697 #endif 698 } 699 if(error != 0) { 700 #ifndef USE_WINSOCK 701 #ifdef EINPROGRESS 702 if(error == EINPROGRESS) 703 continue; /* try again later */ 704 #endif 705 #ifdef EWOULDBLOCK 706 if(error == EWOULDBLOCK) 707 continue; /* try again later */ 708 #endif 709 #else 710 if(error == WSAEINPROGRESS) 711 continue; /* try again later */ 712 if(error == WSAEWOULDBLOCK) 713 continue; /* try again later */ 714 #endif 715 checkconnecterr(error, svr, &addr, addrlen, 716 statuscmd, useport); 717 } 718 } 719 break; 720 } 721 fd_set_block(fd); 722 config_del_strarray(rcif, num_rcif); 723 return fd; 724 } 725 726 /** setup SSL on the connection */ 727 static SSL* 728 setup_ssl(SSL_CTX* ctx, int fd) 729 { 730 SSL* ssl; 731 X509* x; 732 int r; 733 734 if(!ctx) return NULL; 735 ssl = SSL_new(ctx); 736 if(!ssl) 737 ssl_err("could not SSL_new"); 738 SSL_set_connect_state(ssl); 739 (void)SSL_set_mode(ssl, (long)SSL_MODE_AUTO_RETRY); 740 if(!SSL_set_fd(ssl, fd)) 741 ssl_err("could not SSL_set_fd"); 742 while(1) { 743 ERR_clear_error(); 744 if( (r=SSL_do_handshake(ssl)) == 1) 745 break; 746 r = SSL_get_error(ssl, r); 747 if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE) 748 ssl_err("SSL handshake failed"); 749 /* wants to be called again */ 750 } 751 752 /* check authenticity of server */ 753 if(SSL_get_verify_result(ssl) != X509_V_OK) 754 ssl_err("SSL verification failed"); 755 x = SSL_get_peer_certificate(ssl); 756 if(!x) 757 ssl_err("Server presented no peer certificate"); 758 X509_free(x); 759 760 return ssl; 761 } 762 763 /** read from ssl or fd, fatalexit on error, 0 EOF, 1 success */ 764 static int 765 remote_read(SSL* ssl, int fd, char* buf, size_t len) 766 { 767 if(ssl) { 768 int r; 769 ERR_clear_error(); 770 if((r = SSL_read(ssl, buf, (int)len-1)) <= 0) { 771 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 772 /* EOF */ 773 return 0; 774 } 775 ssl_err("could not SSL_read"); 776 } 777 buf[r] = 0; 778 } else { 779 ssize_t rr = recv(fd, buf, len-1, 0); 780 if(rr <= 0) { 781 if(rr == 0) { 782 /* EOF */ 783 return 0; 784 } 785 fatal_exit("could not recv: %s", sock_strerror(errno)); 786 } 787 buf[rr] = 0; 788 } 789 return 1; 790 } 791 792 /** write to ssl or fd, fatalexit on error */ 793 static void 794 remote_write(SSL* ssl, int fd, const char* buf, size_t len) 795 { 796 if(ssl) { 797 if(SSL_write(ssl, buf, (int)len) <= 0) 798 ssl_err("could not SSL_write"); 799 } else { 800 if(send(fd, buf, len, 0) < (ssize_t)len) { 801 fatal_exit("could not send: %s", sock_strerror(errno)); 802 } 803 } 804 } 805 806 /** check args, to see if too many args. Because when a file is sent it 807 * would wait for the terminal, and we can check for too many arguments, 808 * eg. user put arguments on the commandline. */ 809 static void 810 check_args_for_listcmd(int argc, char* argv[]) 811 { 812 if(argc >= 1 && (strcmp(argv[0], "local_zones") == 0 || 813 strcmp(argv[0], "local_zones_remove") == 0 || 814 strcmp(argv[0], "local_datas") == 0 || 815 strcmp(argv[0], "local_datas_remove") == 0) && 816 argc >= 2) { 817 fatal_exit("too many arguments for command '%s', " 818 "content is piped in from stdin", argv[0]); 819 } 820 if(argc >= 1 && (strcmp(argv[0], "view_local_datas") == 0 || 821 strcmp(argv[0], "view_local_datas_remove") == 0) && 822 argc >= 3) { 823 fatal_exit("too many arguments for command '%s', " 824 "content is piped in from stdin", argv[0]); 825 } 826 } 827 828 /** send stdin to server */ 829 static void 830 send_file(SSL* ssl, int fd, FILE* in, char* buf, size_t sz) 831 { 832 while(fgets(buf, (int)sz, in)) { 833 remote_write(ssl, fd, buf, strlen(buf)); 834 } 835 } 836 837 /** send end-of-file marker to server */ 838 static void 839 send_eof(SSL* ssl, int fd) 840 { 841 char e[] = {0x04, 0x0a}; 842 remote_write(ssl, fd, e, sizeof(e)); 843 } 844 845 /** send command and display result */ 846 static int 847 go_cmd(SSL* ssl, int fd, int quiet, int argc, char* argv[]) 848 { 849 char pre[10]; 850 const char* space=" "; 851 const char* newline="\n"; 852 int was_error = 0, first_line = 1; 853 int i; 854 char buf[1024]; 855 snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION); 856 remote_write(ssl, fd, pre, strlen(pre)); 857 for(i=0; i<argc; i++) { 858 remote_write(ssl, fd, space, strlen(space)); 859 remote_write(ssl, fd, argv[i], strlen(argv[i])); 860 } 861 remote_write(ssl, fd, newline, strlen(newline)); 862 863 if(argc == 1 && strcmp(argv[0], "load_cache") == 0) { 864 send_file(ssl, fd, stdin, buf, sizeof(buf)); 865 } 866 else if(argc >= 1 && (strcmp(argv[0], "local_zones") == 0 || 867 strcmp(argv[0], "local_zones_remove") == 0 || 868 strcmp(argv[0], "local_datas") == 0 || 869 strcmp(argv[0], "view_local_datas") == 0 || 870 strcmp(argv[0], "local_datas_remove") == 0 || 871 strcmp(argv[0], "view_local_datas_remove") == 0)) { 872 send_file(ssl, fd, stdin, buf, sizeof(buf)); 873 send_eof(ssl, fd); 874 } 875 876 while(1) { 877 if(remote_read(ssl, fd, buf, sizeof(buf)) == 0) { 878 break; /* EOF */ 879 } 880 if(first_line && strncmp(buf, "error", 5) == 0) { 881 printf("%s", buf); 882 was_error = 1; 883 } else if(!quiet) { 884 printf("%s", buf); 885 } 886 887 first_line = 0; 888 } 889 return was_error; 890 } 891 892 /** go ahead and read config, contact server and perform command and display */ 893 static int 894 go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[]) 895 { 896 struct config_file* cfg; 897 int fd, ret; 898 SSL_CTX* ctx; 899 SSL* ssl; 900 901 /* read config */ 902 if(!(cfg = config_create())) 903 fatal_exit("out of memory"); 904 if(!config_read(cfg, cfgfile, NULL)) 905 fatal_exit("could not read config file"); 906 if(!cfg->remote_control_enable) 907 log_warn("control-enable is 'no' in the config file."); 908 #ifdef UB_ON_WINDOWS 909 w_config_adjust_directory(cfg); 910 #endif 911 ctx = setup_ctx(cfg); 912 913 /* contact server */ 914 fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0); 915 ssl = setup_ssl(ctx, fd); 916 917 /* send command */ 918 ret = go_cmd(ssl, fd, quiet, argc, argv); 919 920 if(ssl) SSL_free(ssl); 921 sock_close(fd); 922 if(ctx) SSL_CTX_free(ctx); 923 config_delete(cfg); 924 return ret; 925 } 926 927 /** getopt global, in case header files fail to declare it. */ 928 extern int optind; 929 /** getopt global, in case header files fail to declare it. */ 930 extern char* optarg; 931 932 /** Main routine for unbound-control */ 933 int main(int argc, char* argv[]) 934 { 935 int c, ret; 936 int quiet = 0; 937 const char* cfgfile = CONFIGFILE; 938 char* svr = NULL; 939 #ifdef USE_WINSOCK 940 int r; 941 WSADATA wsa_data; 942 #endif 943 #ifdef USE_THREAD_DEBUG 944 /* stop the file output from unbound-control, overwrites the servers */ 945 extern int check_locking_order; 946 check_locking_order = 0; 947 #endif /* USE_THREAD_DEBUG */ 948 checklock_start(); 949 log_ident_set("unbound-control"); 950 log_init(NULL, 0, NULL); 951 #ifdef USE_WINSOCK 952 /* use registry config file in preference to compiletime location */ 953 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 954 cfgfile = CONFIGFILE; 955 #endif 956 /* parse the options */ 957 while( (c=getopt(argc, argv, "c:s:qh")) != -1) { 958 switch(c) { 959 case 'c': 960 cfgfile = optarg; 961 break; 962 case 's': 963 svr = optarg; 964 break; 965 case 'q': 966 quiet = 1; 967 break; 968 case '?': 969 case 'h': 970 default: 971 usage(); 972 } 973 } 974 argc -= optind; 975 argv += optind; 976 if(argc == 0) 977 usage(); 978 if(argc >= 1 && strcmp(argv[0], "start")==0) { 979 #if (defined(TARGET_OS_TV) && TARGET_OS_TV) || (defined(TARGET_OS_WATCH) && TARGET_OS_WATCH) 980 fatal_exit("could not exec unbound: %s", 981 strerror(ENOSYS)); 982 #else 983 if(execlp("unbound", "unbound", "-c", cfgfile, 984 (char*)NULL) < 0) { 985 fatal_exit("could not exec unbound: %s", 986 strerror(errno)); 987 } 988 #endif 989 } 990 if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) { 991 print_stats_shm(cfgfile, quiet); 992 return 0; 993 } 994 check_args_for_listcmd(argc, argv); 995 996 #ifdef USE_WINSOCK 997 if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0) 998 fatal_exit("WSAStartup failed: %s", wsa_strerror(r)); 999 #endif 1000 1001 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS 1002 ERR_load_crypto_strings(); 1003 #endif 1004 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 1005 ERR_load_SSL_strings(); 1006 #endif 1007 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO) 1008 # ifndef S_SPLINT_S 1009 OpenSSL_add_all_algorithms(); 1010 # endif 1011 #else 1012 OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS 1013 | OPENSSL_INIT_ADD_ALL_DIGESTS 1014 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 1015 #endif 1016 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 1017 (void)SSL_library_init(); 1018 #else 1019 (void)OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 1020 #endif 1021 1022 if(!RAND_status()) { 1023 /* try to seed it */ 1024 unsigned char buf[256]; 1025 unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid(); 1026 unsigned int v = seed; 1027 size_t i; 1028 for(i=0; i<256/sizeof(v); i++) { 1029 memmove(buf+i*sizeof(v), &v, sizeof(v)); 1030 v = v*seed + (unsigned int)i; 1031 } 1032 RAND_seed(buf, 256); 1033 log_warn("no entropy, seeding openssl PRNG with time\n"); 1034 } 1035 1036 ret = go(cfgfile, svr, quiet, argc, argv); 1037 1038 #ifdef USE_WINSOCK 1039 WSACleanup(); 1040 #endif 1041 checklock_stop(); 1042 return ret; 1043 } 1044