1 /* 2 * checkconf/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 "daemon/stats.h" 63 #include "sldns/wire2str.h" 64 #include "sldns/pkthdr.h" 65 66 #ifdef HAVE_SYS_IPC_H 67 #include "sys/ipc.h" 68 #endif 69 #ifdef HAVE_SYS_SHM_H 70 #include "sys/shm.h" 71 #endif 72 #ifdef HAVE_SYS_UN_H 73 #include <sys/un.h> 74 #endif 75 76 /** Give unbound-control usage, and exit (1). */ 77 static void 78 usage(void) 79 { 80 printf("Usage: unbound-control [options] command\n"); 81 printf(" Remote control utility for unbound server.\n"); 82 printf("Options:\n"); 83 printf(" -c file config file, default is %s\n", CONFIGFILE); 84 printf(" -s ip[@port] server address, if omitted config is used.\n"); 85 printf(" -q quiet (don't print anything if it works ok).\n"); 86 printf(" -h show this usage help.\n"); 87 printf("Commands:\n"); 88 printf(" start start server; runs unbound(8)\n"); 89 printf(" stop stops the server\n"); 90 printf(" reload reloads the server\n"); 91 printf(" (this flushes data, stats, requestlist)\n"); 92 printf(" stats print statistics\n"); 93 printf(" stats_noreset peek at statistics\n"); 94 #ifdef HAVE_SHMGET 95 printf(" stats_shm print statistics using shm\n"); 96 #endif 97 printf(" status display status of server\n"); 98 printf(" verbosity <number> change logging detail\n"); 99 printf(" log_reopen close and open the logfile\n"); 100 printf(" local_zone <name> <type> add new local zone\n"); 101 printf(" local_zone_remove <name> remove local zone and its contents\n"); 102 printf(" local_data <RR data...> add local data, for example\n"); 103 printf(" local_data www.example.com A 192.0.2.1\n"); 104 printf(" local_data_remove <name> remove local RR data from name\n"); 105 printf(" local_zones, local_zones_remove, local_datas, local_datas_remove\n"); 106 printf(" same, but read list from stdin\n"); 107 printf(" (one entry per line).\n"); 108 printf(" dump_cache print cache to stdout\n"); 109 printf(" load_cache load cache from stdin\n"); 110 printf(" lookup <name> print nameservers for name\n"); 111 printf(" flush <name> flushes common types for name from cache\n"); 112 printf(" types: A, AAAA, MX, PTR, NS,\n"); 113 printf(" SOA, CNAME, DNAME, SRV, NAPTR\n"); 114 printf(" flush_type <name> <type> flush name, type from cache\n"); 115 printf(" flush_zone <name> flush everything at or under name\n"); 116 printf(" from rr and dnssec caches\n"); 117 printf(" flush_bogus flush all bogus data\n"); 118 printf(" flush_negative flush all negative data\n"); 119 printf(" flush_stats flush statistics, make zero\n"); 120 printf(" flush_requestlist drop queries that are worked on\n"); 121 printf(" dump_requestlist show what is worked on by first thread\n"); 122 printf(" flush_infra [all | ip] remove ping, edns for one IP or all\n"); 123 printf(" dump_infra show ping and edns entries\n"); 124 printf(" set_option opt: val set option to value, no reload\n"); 125 printf(" get_option opt get option value\n"); 126 printf(" list_stubs list stub-zones and root hints in use\n"); 127 printf(" list_forwards list forward-zones in use\n"); 128 printf(" list_insecure list domain-insecure zones\n"); 129 printf(" list_local_zones list local-zones in use\n"); 130 printf(" list_local_data list local-data RRs in use\n"); 131 printf(" insecure_add zone add domain-insecure zone\n"); 132 printf(" insecure_remove zone remove domain-insecure zone\n"); 133 printf(" forward_add [+i] zone addr.. add forward-zone with servers\n"); 134 printf(" forward_remove [+i] zone remove forward zone\n"); 135 printf(" stub_add [+ip] zone addr.. add stub-zone with servers\n"); 136 printf(" stub_remove [+i] zone remove stub zone\n"); 137 printf(" +i also do dnssec insecure point\n"); 138 printf(" +p set stub to use priming\n"); 139 printf(" forward [off | addr ...] without arg show forward setup\n"); 140 printf(" or off to turn off root forwarding\n"); 141 printf(" or give list of ip addresses\n"); 142 printf(" ratelimit_list [+a] list ratelimited domains\n"); 143 printf(" ip_ratelimit_list [+a] list ratelimited ip addresses\n"); 144 printf(" +a list all, also not ratelimited\n"); 145 printf(" view_list_local_zones view list local-zones in view\n"); 146 printf(" view_list_local_data view list local-data RRs in view\n"); 147 printf(" view_local_zone view name type add local-zone in view\n"); 148 printf(" view_local_zone_remove view name remove local-zone in view\n"); 149 printf(" view_local_data view RR... add local-data in view\n"); 150 printf(" view_local_data_remove view name remove local-data in view\n"); 151 printf("Version %s\n", PACKAGE_VERSION); 152 printf("BSD licensed, see LICENSE in source package for details.\n"); 153 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 154 exit(1); 155 } 156 157 #ifdef HAVE_SHMGET 158 /** what to put on statistics lines between var and value, ": " or "=" */ 159 #define SQ "=" 160 /** if true, inhibits a lot of =0 lines from the stats output */ 161 static const int inhibit_zero = 1; 162 /** divide sum of timers to get average */ 163 static void 164 timeval_divide(struct timeval* avg, const struct timeval* sum, long long d) 165 { 166 #ifndef S_SPLINT_S 167 size_t leftover; 168 if(d == 0) { 169 avg->tv_sec = 0; 170 avg->tv_usec = 0; 171 return; 172 } 173 avg->tv_sec = sum->tv_sec / d; 174 avg->tv_usec = sum->tv_usec / d; 175 /* handle fraction from seconds divide */ 176 leftover = sum->tv_sec - avg->tv_sec*d; 177 avg->tv_usec += (leftover*1000000)/d; 178 #endif 179 } 180 181 /** print unsigned long stats value */ 182 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var)); 183 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var)); 184 #define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var)); 185 #define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 186 (long long)var.tv_sec, (int)var.tv_usec); 187 #define PR_STATSTIME(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 188 (long long)var ## _sec, (int)var ## _usec); 189 #define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var)); 190 191 /** print stat block */ 192 static void pr_stats(const char* nm, struct ub_stats_info* s) 193 { 194 struct timeval sumwait, avg; 195 PR_UL_NM("num.queries", s->svr.num_queries); 196 PR_UL_NM("num.queries_ip_ratelimited", 197 s->svr.num_queries_ip_ratelimited); 198 PR_UL_NM("num.cachehits", 199 s->svr.num_queries - s->svr.num_queries_missed_cache); 200 PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache); 201 PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch); 202 PR_UL_NM("num.zero_ttl", s->svr.zero_ttl_responses); 203 PR_UL_NM("num.recursivereplies", s->mesh_replies_sent); 204 #ifdef USE_DNSCRYPT 205 PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted); 206 PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert); 207 PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext); 208 PR_UL_NM("num.dnscrypt.malformed", 209 s->svr.num_query_dnscrypt_crypted_malformed); 210 #endif /* USE_DNSCRYPT */ 211 printf("%s.requestlist.avg"SQ"%g\n", nm, 212 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)? 213 (double)s->svr.sum_query_list_size/ 214 (double)(s->svr.num_queries_missed_cache+ 215 s->svr.num_queries_prefetch) : 0.0); 216 PR_UL_NM("requestlist.max", s->svr.max_query_list_size); 217 PR_UL_NM("requestlist.overwritten", s->mesh_jostled); 218 PR_UL_NM("requestlist.exceeded", s->mesh_dropped); 219 PR_UL_NM("requestlist.current.all", s->mesh_num_states); 220 PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states); 221 #ifndef S_SPLINT_S 222 sumwait.tv_sec = s->mesh_replies_sum_wait_sec; 223 sumwait.tv_usec = s->mesh_replies_sum_wait_usec; 224 #endif 225 timeval_divide(&avg, &sumwait, s->mesh_replies_sent); 226 printf("%s.", nm); 227 PR_TIMEVAL("recursion.time.avg", avg); 228 printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median); 229 PR_UL_NM("tcpusage", s->svr.tcp_accept_usage); 230 } 231 232 /** print uptime */ 233 static void print_uptime(struct ub_shm_stat_info* shm_stat) 234 { 235 PR_STATSTIME("time.now", shm_stat->time.now); 236 PR_STATSTIME("time.up", shm_stat->time.up); 237 PR_STATSTIME("time.elapsed", shm_stat->time.elapsed); 238 } 239 240 /** print memory usage */ 241 static void print_mem(struct ub_shm_stat_info* shm_stat) 242 { 243 PR_LL("mem.cache.rrset", shm_stat->mem.rrset); 244 PR_LL("mem.cache.message", shm_stat->mem.msg); 245 PR_LL("mem.mod.iterator", shm_stat->mem.iter); 246 PR_LL("mem.mod.validator", shm_stat->mem.val); 247 PR_LL("mem.mod.respip", shm_stat->mem.respip); 248 #ifdef CLIENT_SUBNET 249 PR_LL("mem.mod.subnet", shm_stat->mem.subnet); 250 #endif 251 #ifdef USE_IPSECMOD 252 PR_LL("mem.mod.ipsecmod", shm_stat->mem.ipsecmod); 253 #endif 254 #ifdef USE_DNSCRYPT 255 PR_LL("mem.cache.dnscrypt_shared_secret", 256 shm_stat->mem.dnscrypt_shared_secret); 257 PR_LL("mem.cache.dnscrypt_nonce", 258 shm_stat->mem.dnscrypt_nonce); 259 #endif 260 } 261 262 /** print histogram */ 263 static void print_hist(struct ub_stats_info* s) 264 { 265 struct timehist* hist; 266 size_t i; 267 hist = timehist_setup(); 268 if(!hist) 269 fatal_exit("out of memory"); 270 timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST); 271 for(i=0; i<hist->num; i++) { 272 printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n", 273 (int)hist->buckets[i].lower.tv_sec, 274 (int)hist->buckets[i].lower.tv_usec, 275 (int)hist->buckets[i].upper.tv_sec, 276 (int)hist->buckets[i].upper.tv_usec, 277 (unsigned long)hist->buckets[i].count); 278 } 279 timehist_delete(hist); 280 } 281 282 /** print extended */ 283 static void print_extended(struct ub_stats_info* s) 284 { 285 int i; 286 char nm[16]; 287 288 /* TYPE */ 289 for(i=0; i<UB_STATS_QTYPE_NUM; i++) { 290 if(inhibit_zero && s->svr.qtype[i] == 0) 291 continue; 292 sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm)); 293 PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]); 294 } 295 if(!inhibit_zero || s->svr.qtype_big) { 296 PR_UL("num.query.type.other", s->svr.qtype_big); 297 } 298 299 /* CLASS */ 300 for(i=0; i<UB_STATS_QCLASS_NUM; i++) { 301 if(inhibit_zero && s->svr.qclass[i] == 0) 302 continue; 303 sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm)); 304 PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]); 305 } 306 if(!inhibit_zero || s->svr.qclass_big) { 307 PR_UL("num.query.class.other", s->svr.qclass_big); 308 } 309 310 /* OPCODE */ 311 for(i=0; i<UB_STATS_OPCODE_NUM; i++) { 312 if(inhibit_zero && s->svr.qopcode[i] == 0) 313 continue; 314 sldns_wire2str_opcode_buf(i, nm, sizeof(nm)); 315 PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]); 316 } 317 318 /* transport */ 319 PR_UL("num.query.tcp", s->svr.qtcp); 320 PR_UL("num.query.tcpout", s->svr.qtcp_outgoing); 321 PR_UL("num.query.ipv6", s->svr.qipv6); 322 323 /* flags */ 324 PR_UL("num.query.flags.QR", s->svr.qbit_QR); 325 PR_UL("num.query.flags.AA", s->svr.qbit_AA); 326 PR_UL("num.query.flags.TC", s->svr.qbit_TC); 327 PR_UL("num.query.flags.RD", s->svr.qbit_RD); 328 PR_UL("num.query.flags.RA", s->svr.qbit_RA); 329 PR_UL("num.query.flags.Z", s->svr.qbit_Z); 330 PR_UL("num.query.flags.AD", s->svr.qbit_AD); 331 PR_UL("num.query.flags.CD", s->svr.qbit_CD); 332 PR_UL("num.query.edns.present", s->svr.qEDNS); 333 PR_UL("num.query.edns.DO", s->svr.qEDNS_DO); 334 335 /* RCODE */ 336 for(i=0; i<UB_STATS_RCODE_NUM; i++) { 337 /* Always include RCODEs 0-5 */ 338 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0) 339 continue; 340 sldns_wire2str_rcode_buf(i, nm, sizeof(nm)); 341 PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]); 342 } 343 if(!inhibit_zero || s->svr.ans_rcode_nodata) { 344 PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata); 345 } 346 /* iteration */ 347 PR_UL("num.query.ratelimited", s->svr.queries_ratelimited); 348 /* validation */ 349 PR_UL("num.answer.secure", s->svr.ans_secure); 350 PR_UL("num.answer.bogus", s->svr.ans_bogus); 351 PR_UL("num.rrset.bogus", s->svr.rrset_bogus); 352 /* threat detection */ 353 PR_UL("unwanted.queries", s->svr.unwanted_queries); 354 PR_UL("unwanted.replies", s->svr.unwanted_replies); 355 /* cache counts */ 356 PR_UL("msg.cache.count", s->svr.msg_cache_count); 357 PR_UL("rrset.cache.count", s->svr.rrset_cache_count); 358 PR_UL("infra.cache.count", s->svr.infra_cache_count); 359 PR_UL("key.cache.count", s->svr.key_cache_count); 360 #ifdef USE_DNSCRYPT 361 PR_UL("dnscrypt_shared_secret.cache.count", 362 s->svr.shared_secret_cache_count); 363 PR_UL("num.query.dnscrypt.shared_secret.cachemiss", 364 s->svr.num_query_dnscrypt_secret_missed_cache); 365 PR_UL("dnscrypt_nonce.cache.count", s->svr.nonce_cache_count); 366 PR_UL("num.query.dnscrypt.replay", 367 s->svr.num_query_dnscrypt_replay); 368 #endif /* USE_DNSCRYPT */ 369 } 370 371 /** print statistics out of memory structures */ 372 static void do_stats_shm(struct config_file* cfg, struct ub_stats_info* stats, 373 struct ub_shm_stat_info* shm_stat) 374 { 375 int i; 376 char nm[32]; 377 for(i=0; i<cfg->num_threads; i++) { 378 snprintf(nm, sizeof(nm), "thread%d", i); 379 pr_stats(nm, &stats[i+1]); 380 } 381 pr_stats("total", &stats[0]); 382 print_uptime(shm_stat); 383 if(cfg->stat_extended) { 384 print_mem(shm_stat); 385 print_hist(stats); 386 print_extended(stats); 387 } 388 } 389 #endif /* HAVE_SHMGET */ 390 391 /** print statistics from shm memory segment */ 392 static void print_stats_shm(const char* cfgfile) 393 { 394 #ifdef HAVE_SHMGET 395 struct config_file* cfg; 396 struct ub_stats_info* stats; 397 struct ub_shm_stat_info* shm_stat; 398 int id_ctl, id_arr; 399 /* read config */ 400 if(!(cfg = config_create())) 401 fatal_exit("out of memory"); 402 if(!config_read(cfg, cfgfile, NULL)) 403 fatal_exit("could not read config file"); 404 /* get shm segments */ 405 id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R|SHM_W); 406 if(id_ctl == -1) { 407 fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno)); 408 } 409 id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R|SHM_W); 410 if(id_arr == -1) { 411 fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno)); 412 } 413 shm_stat = (struct ub_shm_stat_info*)shmat(id_ctl, NULL, 0); 414 if(shm_stat == (void*)-1) { 415 fatal_exit("shmat(%d): %s", id_ctl, strerror(errno)); 416 } 417 stats = (struct ub_stats_info*)shmat(id_arr, NULL, 0); 418 if(stats == (void*)-1) { 419 fatal_exit("shmat(%d): %s", id_arr, strerror(errno)); 420 } 421 422 /* print the stats */ 423 do_stats_shm(cfg, stats, shm_stat); 424 425 /* shutdown */ 426 shmdt(shm_stat); 427 shmdt(stats); 428 config_delete(cfg); 429 #else 430 (void)cfgfile; 431 #endif /* HAVE_SHMGET */ 432 } 433 434 /** exit with ssl error */ 435 static void ssl_err(const char* s) 436 { 437 fprintf(stderr, "error: %s\n", s); 438 ERR_print_errors_fp(stderr); 439 exit(1); 440 } 441 442 /** setup SSL context */ 443 static SSL_CTX* 444 setup_ctx(struct config_file* cfg) 445 { 446 char* s_cert=NULL, *c_key=NULL, *c_cert=NULL; 447 SSL_CTX* ctx; 448 449 if(cfg->remote_control_use_cert) { 450 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1); 451 c_key = fname_after_chroot(cfg->control_key_file, cfg, 1); 452 c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1); 453 if(!s_cert || !c_key || !c_cert) 454 fatal_exit("out of memory"); 455 } 456 ctx = SSL_CTX_new(SSLv23_client_method()); 457 if(!ctx) 458 ssl_err("could not allocate SSL_CTX pointer"); 459 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 460 != SSL_OP_NO_SSLv2) 461 ssl_err("could not set SSL_OP_NO_SSLv2"); 462 if(cfg->remote_control_use_cert) { 463 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 464 != SSL_OP_NO_SSLv3) 465 ssl_err("could not set SSL_OP_NO_SSLv3"); 466 if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert) || 467 !SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM) 468 || !SSL_CTX_check_private_key(ctx)) 469 ssl_err("Error setting up SSL_CTX client key and cert"); 470 if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1) 471 ssl_err("Error setting up SSL_CTX verify, server cert"); 472 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 473 474 free(s_cert); 475 free(c_key); 476 free(c_cert); 477 } else { 478 /* Use ciphers that don't require authentication */ 479 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL 480 SSL_CTX_set_security_level(ctx, 0); 481 #endif 482 if(!SSL_CTX_set_cipher_list(ctx, "aNULL, eNULL")) 483 ssl_err("Error setting NULL cipher!"); 484 } 485 return ctx; 486 } 487 488 /** contact the server with TCP connect */ 489 static int 490 contact_server(const char* svr, struct config_file* cfg, int statuscmd) 491 { 492 struct sockaddr_storage addr; 493 socklen_t addrlen; 494 int addrfamily = 0; 495 int fd; 496 /* use svr or the first config entry */ 497 if(!svr) { 498 if(cfg->control_ifs) { 499 svr = cfg->control_ifs->str; 500 } else if(cfg->do_ip4) { 501 svr = "127.0.0.1"; 502 } else { 503 svr = "::1"; 504 } 505 /* config 0 addr (everything), means ask localhost */ 506 if(strcmp(svr, "0.0.0.0") == 0) 507 svr = "127.0.0.1"; 508 else if(strcmp(svr, "::0") == 0 || 509 strcmp(svr, "0::0") == 0 || 510 strcmp(svr, "0::") == 0 || 511 strcmp(svr, "::") == 0) 512 svr = "::1"; 513 } 514 if(strchr(svr, '@')) { 515 if(!extstrtoaddr(svr, &addr, &addrlen)) 516 fatal_exit("could not parse IP@port: %s", svr); 517 #ifdef HAVE_SYS_UN_H 518 } else if(svr[0] == '/') { 519 struct sockaddr_un* usock = (struct sockaddr_un *) &addr; 520 usock->sun_family = AF_LOCAL; 521 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 522 usock->sun_len = (unsigned)sizeof(usock); 523 #endif 524 (void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path)); 525 addrlen = (socklen_t)sizeof(struct sockaddr_un); 526 addrfamily = AF_LOCAL; 527 #endif 528 } else { 529 if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen)) 530 fatal_exit("could not parse IP: %s", svr); 531 } 532 533 if(addrfamily == 0) 534 addrfamily = addr_is_ip6(&addr, addrlen)?AF_INET6:AF_INET; 535 fd = socket(addrfamily, SOCK_STREAM, 0); 536 if(fd == -1) { 537 #ifndef USE_WINSOCK 538 fatal_exit("socket: %s", strerror(errno)); 539 #else 540 fatal_exit("socket: %s", wsa_strerror(WSAGetLastError())); 541 #endif 542 } 543 if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) { 544 #ifndef USE_WINSOCK 545 log_err_addr("connect", strerror(errno), &addr, addrlen); 546 if(errno == ECONNREFUSED && statuscmd) { 547 printf("unbound is stopped\n"); 548 exit(3); 549 } 550 #else 551 log_err_addr("connect", wsa_strerror(WSAGetLastError()), &addr, addrlen); 552 if(WSAGetLastError() == WSAECONNREFUSED && statuscmd) { 553 printf("unbound is stopped\n"); 554 exit(3); 555 } 556 #endif 557 exit(1); 558 } 559 return fd; 560 } 561 562 /** setup SSL on the connection */ 563 static SSL* 564 setup_ssl(SSL_CTX* ctx, int fd, struct config_file* cfg) 565 { 566 SSL* ssl; 567 X509* x; 568 int r; 569 570 ssl = SSL_new(ctx); 571 if(!ssl) 572 ssl_err("could not SSL_new"); 573 SSL_set_connect_state(ssl); 574 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 575 if(!SSL_set_fd(ssl, fd)) 576 ssl_err("could not SSL_set_fd"); 577 while(1) { 578 ERR_clear_error(); 579 if( (r=SSL_do_handshake(ssl)) == 1) 580 break; 581 r = SSL_get_error(ssl, r); 582 if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE) 583 ssl_err("SSL handshake failed"); 584 /* wants to be called again */ 585 } 586 587 /* check authenticity of server */ 588 if(SSL_get_verify_result(ssl) != X509_V_OK) 589 ssl_err("SSL verification failed"); 590 if(cfg->remote_control_use_cert) { 591 x = SSL_get_peer_certificate(ssl); 592 if(!x) 593 ssl_err("Server presented no peer certificate"); 594 X509_free(x); 595 } 596 597 return ssl; 598 } 599 600 /** send stdin to server */ 601 static void 602 send_file(SSL* ssl, FILE* in, char* buf, size_t sz) 603 { 604 while(fgets(buf, (int)sz, in)) { 605 if(SSL_write(ssl, buf, (int)strlen(buf)) <= 0) 606 ssl_err("could not SSL_write contents"); 607 } 608 } 609 610 /** send end-of-file marker to server */ 611 static void 612 send_eof(SSL* ssl) 613 { 614 char e[] = {0x04, 0x0a}; 615 if(SSL_write(ssl, e, (int)sizeof(e)) <= 0) 616 ssl_err("could not SSL_write end-of-file marker"); 617 } 618 619 /** send command and display result */ 620 static int 621 go_cmd(SSL* ssl, int quiet, int argc, char* argv[]) 622 { 623 char pre[10]; 624 const char* space=" "; 625 const char* newline="\n"; 626 int was_error = 0, first_line = 1; 627 int r, i; 628 char buf[1024]; 629 snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION); 630 if(SSL_write(ssl, pre, (int)strlen(pre)) <= 0) 631 ssl_err("could not SSL_write"); 632 for(i=0; i<argc; i++) { 633 if(SSL_write(ssl, space, (int)strlen(space)) <= 0) 634 ssl_err("could not SSL_write"); 635 if(SSL_write(ssl, argv[i], (int)strlen(argv[i])) <= 0) 636 ssl_err("could not SSL_write"); 637 } 638 if(SSL_write(ssl, newline, (int)strlen(newline)) <= 0) 639 ssl_err("could not SSL_write"); 640 641 if(argc == 1 && strcmp(argv[0], "load_cache") == 0) { 642 send_file(ssl, stdin, buf, sizeof(buf)); 643 } 644 else if(argc == 1 && (strcmp(argv[0], "local_zones") == 0 || 645 strcmp(argv[0], "local_zones_remove") == 0 || 646 strcmp(argv[0], "local_datas") == 0 || 647 strcmp(argv[0], "local_datas_remove") == 0)) { 648 send_file(ssl, stdin, buf, sizeof(buf)); 649 send_eof(ssl); 650 } 651 652 while(1) { 653 ERR_clear_error(); 654 if((r = SSL_read(ssl, buf, (int)sizeof(buf)-1)) <= 0) { 655 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 656 /* EOF */ 657 break; 658 } 659 ssl_err("could not SSL_read"); 660 } 661 buf[r] = 0; 662 if(first_line && strncmp(buf, "error", 5) == 0) { 663 printf("%s", buf); 664 was_error = 1; 665 } else if (!quiet) 666 printf("%s", buf); 667 668 first_line = 0; 669 } 670 return was_error; 671 } 672 673 /** go ahead and read config, contact server and perform command and display */ 674 static int 675 go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[]) 676 { 677 struct config_file* cfg; 678 int fd, ret; 679 SSL_CTX* ctx; 680 SSL* ssl; 681 682 /* read config */ 683 if(!(cfg = config_create())) 684 fatal_exit("out of memory"); 685 if(!config_read(cfg, cfgfile, NULL)) 686 fatal_exit("could not read config file"); 687 if(!cfg->remote_control_enable) 688 log_warn("control-enable is 'no' in the config file."); 689 #ifdef UB_ON_WINDOWS 690 w_config_adjust_directory(cfg); 691 #endif 692 ctx = setup_ctx(cfg); 693 694 /* contact server */ 695 fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0); 696 ssl = setup_ssl(ctx, fd, cfg); 697 698 /* send command */ 699 ret = go_cmd(ssl, quiet, argc, argv); 700 701 SSL_free(ssl); 702 #ifndef USE_WINSOCK 703 close(fd); 704 #else 705 closesocket(fd); 706 #endif 707 SSL_CTX_free(ctx); 708 config_delete(cfg); 709 return ret; 710 } 711 712 /** getopt global, in case header files fail to declare it. */ 713 extern int optind; 714 /** getopt global, in case header files fail to declare it. */ 715 extern char* optarg; 716 717 /** Main routine for unbound-control */ 718 int main(int argc, char* argv[]) 719 { 720 int c, ret; 721 int quiet = 0; 722 const char* cfgfile = CONFIGFILE; 723 char* svr = NULL; 724 #ifdef USE_WINSOCK 725 int r; 726 WSADATA wsa_data; 727 #endif 728 #ifdef USE_THREAD_DEBUG 729 /* stop the file output from unbound-control, overwrites the servers */ 730 extern int check_locking_order; 731 check_locking_order = 0; 732 #endif /* USE_THREAD_DEBUG */ 733 log_ident_set("unbound-control"); 734 log_init(NULL, 0, NULL); 735 checklock_start(); 736 #ifdef USE_WINSOCK 737 /* use registry config file in preference to compiletime location */ 738 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 739 cfgfile = CONFIGFILE; 740 #endif 741 /* parse the options */ 742 while( (c=getopt(argc, argv, "c:s:qh")) != -1) { 743 switch(c) { 744 case 'c': 745 cfgfile = optarg; 746 break; 747 case 's': 748 svr = optarg; 749 break; 750 case 'q': 751 quiet = 1; 752 break; 753 case '?': 754 case 'h': 755 default: 756 usage(); 757 } 758 } 759 argc -= optind; 760 argv += optind; 761 if(argc == 0) 762 usage(); 763 if(argc >= 1 && strcmp(argv[0], "start")==0) { 764 if(execlp("unbound", "unbound", "-c", cfgfile, 765 (char*)NULL) < 0) { 766 fatal_exit("could not exec unbound: %s", 767 strerror(errno)); 768 } 769 } 770 if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) { 771 print_stats_shm(cfgfile); 772 return 0; 773 } 774 775 #ifdef USE_WINSOCK 776 if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0) 777 fatal_exit("WSAStartup failed: %s", wsa_strerror(r)); 778 #endif 779 780 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS 781 ERR_load_crypto_strings(); 782 #endif 783 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 784 ERR_load_SSL_strings(); 785 #endif 786 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO) 787 OpenSSL_add_all_algorithms(); 788 #else 789 OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS 790 | OPENSSL_INIT_ADD_ALL_DIGESTS 791 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 792 #endif 793 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 794 (void)SSL_library_init(); 795 #else 796 (void)OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 797 #endif 798 799 if(!RAND_status()) { 800 /* try to seed it */ 801 unsigned char buf[256]; 802 unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid(); 803 unsigned int v = seed; 804 size_t i; 805 for(i=0; i<256/sizeof(v); i++) { 806 memmove(buf+i*sizeof(v), &v, sizeof(v)); 807 v = v*seed + (unsigned int)i; 808 } 809 RAND_seed(buf, 256); 810 log_warn("no entropy, seeding openssl PRNG with time\n"); 811 } 812 813 ret = go(cfgfile, svr, quiet, argc, argv); 814 815 #ifdef USE_WINSOCK 816 WSACleanup(); 817 #endif 818 checklock_stop(); 819 return ret; 820 } 821