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: local-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(" list_auth_zones list auth zones\n"); 146 printf(" view_list_local_zones view list local-zones in view\n"); 147 printf(" view_list_local_data view list local-data RRs in view\n"); 148 printf(" view_local_zone view name type add local-zone in view\n"); 149 printf(" view_local_zone_remove view name remove local-zone in view\n"); 150 printf(" view_local_data view RR... add local-data in view\n"); 151 printf(" view_local_data_remove view name remove local-data in view\n"); 152 printf("Version %s\n", PACKAGE_VERSION); 153 printf("BSD licensed, see LICENSE in source package for details.\n"); 154 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 155 exit(1); 156 } 157 158 #ifdef HAVE_SHMGET 159 /** what to put on statistics lines between var and value, ": " or "=" */ 160 #define SQ "=" 161 /** if true, inhibits a lot of =0 lines from the stats output */ 162 static const int inhibit_zero = 1; 163 /** divide sum of timers to get average */ 164 static void 165 timeval_divide(struct timeval* avg, const struct timeval* sum, long long d) 166 { 167 #ifndef S_SPLINT_S 168 size_t leftover; 169 if(d == 0) { 170 avg->tv_sec = 0; 171 avg->tv_usec = 0; 172 return; 173 } 174 avg->tv_sec = sum->tv_sec / d; 175 avg->tv_usec = sum->tv_usec / d; 176 /* handle fraction from seconds divide */ 177 leftover = sum->tv_sec - avg->tv_sec*d; 178 avg->tv_usec += (leftover*1000000)/d; 179 #endif 180 } 181 182 /** print unsigned long stats value */ 183 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var)); 184 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var)); 185 #define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var)); 186 #define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 187 (long long)var.tv_sec, (int)var.tv_usec); 188 #define PR_STATSTIME(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 189 (long long)var ## _sec, (int)var ## _usec); 190 #define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var)); 191 192 /** print stat block */ 193 static void pr_stats(const char* nm, struct ub_stats_info* s) 194 { 195 struct timeval sumwait, avg; 196 PR_UL_NM("num.queries", s->svr.num_queries); 197 PR_UL_NM("num.queries_ip_ratelimited", 198 s->svr.num_queries_ip_ratelimited); 199 PR_UL_NM("num.cachehits", 200 s->svr.num_queries - s->svr.num_queries_missed_cache); 201 PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache); 202 PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch); 203 PR_UL_NM("num.zero_ttl", s->svr.zero_ttl_responses); 204 PR_UL_NM("num.recursivereplies", s->mesh_replies_sent); 205 #ifdef USE_DNSCRYPT 206 PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted); 207 PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert); 208 PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext); 209 PR_UL_NM("num.dnscrypt.malformed", 210 s->svr.num_query_dnscrypt_crypted_malformed); 211 #endif /* USE_DNSCRYPT */ 212 printf("%s.requestlist.avg"SQ"%g\n", nm, 213 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)? 214 (double)s->svr.sum_query_list_size/ 215 (double)(s->svr.num_queries_missed_cache+ 216 s->svr.num_queries_prefetch) : 0.0); 217 PR_UL_NM("requestlist.max", s->svr.max_query_list_size); 218 PR_UL_NM("requestlist.overwritten", s->mesh_jostled); 219 PR_UL_NM("requestlist.exceeded", s->mesh_dropped); 220 PR_UL_NM("requestlist.current.all", s->mesh_num_states); 221 PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states); 222 #ifndef S_SPLINT_S 223 sumwait.tv_sec = s->mesh_replies_sum_wait_sec; 224 sumwait.tv_usec = s->mesh_replies_sum_wait_usec; 225 #endif 226 timeval_divide(&avg, &sumwait, s->mesh_replies_sent); 227 printf("%s.", nm); 228 PR_TIMEVAL("recursion.time.avg", avg); 229 printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median); 230 PR_UL_NM("tcpusage", s->svr.tcp_accept_usage); 231 } 232 233 /** print uptime */ 234 static void print_uptime(struct ub_shm_stat_info* shm_stat) 235 { 236 PR_STATSTIME("time.now", shm_stat->time.now); 237 PR_STATSTIME("time.up", shm_stat->time.up); 238 PR_STATSTIME("time.elapsed", shm_stat->time.elapsed); 239 } 240 241 /** print memory usage */ 242 static void print_mem(struct ub_shm_stat_info* shm_stat) 243 { 244 PR_LL("mem.cache.rrset", shm_stat->mem.rrset); 245 PR_LL("mem.cache.message", shm_stat->mem.msg); 246 PR_LL("mem.mod.iterator", shm_stat->mem.iter); 247 PR_LL("mem.mod.validator", shm_stat->mem.val); 248 PR_LL("mem.mod.respip", shm_stat->mem.respip); 249 #ifdef CLIENT_SUBNET 250 PR_LL("mem.mod.subnet", shm_stat->mem.subnet); 251 #endif 252 #ifdef USE_IPSECMOD 253 PR_LL("mem.mod.ipsecmod", shm_stat->mem.ipsecmod); 254 #endif 255 #ifdef USE_DNSCRYPT 256 PR_LL("mem.cache.dnscrypt_shared_secret", 257 shm_stat->mem.dnscrypt_shared_secret); 258 PR_LL("mem.cache.dnscrypt_nonce", 259 shm_stat->mem.dnscrypt_nonce); 260 #endif 261 } 262 263 /** print histogram */ 264 static void print_hist(struct ub_stats_info* s) 265 { 266 struct timehist* hist; 267 size_t i; 268 hist = timehist_setup(); 269 if(!hist) 270 fatal_exit("out of memory"); 271 timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST); 272 for(i=0; i<hist->num; i++) { 273 printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n", 274 (int)hist->buckets[i].lower.tv_sec, 275 (int)hist->buckets[i].lower.tv_usec, 276 (int)hist->buckets[i].upper.tv_sec, 277 (int)hist->buckets[i].upper.tv_usec, 278 (unsigned long)hist->buckets[i].count); 279 } 280 timehist_delete(hist); 281 } 282 283 /** print extended */ 284 static void print_extended(struct ub_stats_info* s) 285 { 286 int i; 287 char nm[16]; 288 289 /* TYPE */ 290 for(i=0; i<UB_STATS_QTYPE_NUM; i++) { 291 if(inhibit_zero && s->svr.qtype[i] == 0) 292 continue; 293 sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm)); 294 PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]); 295 } 296 if(!inhibit_zero || s->svr.qtype_big) { 297 PR_UL("num.query.type.other", s->svr.qtype_big); 298 } 299 300 /* CLASS */ 301 for(i=0; i<UB_STATS_QCLASS_NUM; i++) { 302 if(inhibit_zero && s->svr.qclass[i] == 0) 303 continue; 304 sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm)); 305 PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]); 306 } 307 if(!inhibit_zero || s->svr.qclass_big) { 308 PR_UL("num.query.class.other", s->svr.qclass_big); 309 } 310 311 /* OPCODE */ 312 for(i=0; i<UB_STATS_OPCODE_NUM; i++) { 313 if(inhibit_zero && s->svr.qopcode[i] == 0) 314 continue; 315 sldns_wire2str_opcode_buf(i, nm, sizeof(nm)); 316 PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]); 317 } 318 319 /* transport */ 320 PR_UL("num.query.tcp", s->svr.qtcp); 321 PR_UL("num.query.tcpout", s->svr.qtcp_outgoing); 322 PR_UL("num.query.ipv6", s->svr.qipv6); 323 324 /* flags */ 325 PR_UL("num.query.flags.QR", s->svr.qbit_QR); 326 PR_UL("num.query.flags.AA", s->svr.qbit_AA); 327 PR_UL("num.query.flags.TC", s->svr.qbit_TC); 328 PR_UL("num.query.flags.RD", s->svr.qbit_RD); 329 PR_UL("num.query.flags.RA", s->svr.qbit_RA); 330 PR_UL("num.query.flags.Z", s->svr.qbit_Z); 331 PR_UL("num.query.flags.AD", s->svr.qbit_AD); 332 PR_UL("num.query.flags.CD", s->svr.qbit_CD); 333 PR_UL("num.query.edns.present", s->svr.qEDNS); 334 PR_UL("num.query.edns.DO", s->svr.qEDNS_DO); 335 336 /* RCODE */ 337 for(i=0; i<UB_STATS_RCODE_NUM; i++) { 338 /* Always include RCODEs 0-5 */ 339 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0) 340 continue; 341 sldns_wire2str_rcode_buf(i, nm, sizeof(nm)); 342 PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]); 343 } 344 if(!inhibit_zero || s->svr.ans_rcode_nodata) { 345 PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata); 346 } 347 /* iteration */ 348 PR_UL("num.query.ratelimited", s->svr.queries_ratelimited); 349 /* validation */ 350 PR_UL("num.answer.secure", s->svr.ans_secure); 351 PR_UL("num.answer.bogus", s->svr.ans_bogus); 352 PR_UL("num.rrset.bogus", s->svr.rrset_bogus); 353 PR_UL("num.query.aggressive.NOERROR", s->svr.num_neg_cache_noerror); 354 PR_UL("num.query.aggressive.NXDOMAIN", s->svr.num_neg_cache_nxdomain); 355 /* threat detection */ 356 PR_UL("unwanted.queries", s->svr.unwanted_queries); 357 PR_UL("unwanted.replies", s->svr.unwanted_replies); 358 /* cache counts */ 359 PR_UL("msg.cache.count", s->svr.msg_cache_count); 360 PR_UL("rrset.cache.count", s->svr.rrset_cache_count); 361 PR_UL("infra.cache.count", s->svr.infra_cache_count); 362 PR_UL("key.cache.count", s->svr.key_cache_count); 363 #ifdef USE_DNSCRYPT 364 PR_UL("dnscrypt_shared_secret.cache.count", 365 s->svr.shared_secret_cache_count); 366 PR_UL("num.query.dnscrypt.shared_secret.cachemiss", 367 s->svr.num_query_dnscrypt_secret_missed_cache); 368 PR_UL("dnscrypt_nonce.cache.count", s->svr.nonce_cache_count); 369 PR_UL("num.query.dnscrypt.replay", 370 s->svr.num_query_dnscrypt_replay); 371 #endif /* USE_DNSCRYPT */ 372 PR_UL("num.query.authzone.up", s->svr.num_query_authzone_up); 373 PR_UL("num.query.authzone.down", s->svr.num_query_authzone_down); 374 } 375 376 /** print statistics out of memory structures */ 377 static void do_stats_shm(struct config_file* cfg, struct ub_stats_info* stats, 378 struct ub_shm_stat_info* shm_stat) 379 { 380 int i; 381 char nm[32]; 382 for(i=0; i<cfg->num_threads; i++) { 383 snprintf(nm, sizeof(nm), "thread%d", i); 384 pr_stats(nm, &stats[i+1]); 385 } 386 pr_stats("total", &stats[0]); 387 print_uptime(shm_stat); 388 if(cfg->stat_extended) { 389 print_mem(shm_stat); 390 print_hist(stats); 391 print_extended(stats); 392 } 393 } 394 #endif /* HAVE_SHMGET */ 395 396 /** print statistics from shm memory segment */ 397 static void print_stats_shm(const char* cfgfile) 398 { 399 #ifdef HAVE_SHMGET 400 struct config_file* cfg; 401 struct ub_stats_info* stats; 402 struct ub_shm_stat_info* shm_stat; 403 int id_ctl, id_arr; 404 /* read config */ 405 if(!(cfg = config_create())) 406 fatal_exit("out of memory"); 407 if(!config_read(cfg, cfgfile, NULL)) 408 fatal_exit("could not read config file"); 409 /* get shm segments */ 410 id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R|SHM_W); 411 if(id_ctl == -1) { 412 fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno)); 413 } 414 id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R|SHM_W); 415 if(id_arr == -1) { 416 fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno)); 417 } 418 shm_stat = (struct ub_shm_stat_info*)shmat(id_ctl, NULL, 0); 419 if(shm_stat == (void*)-1) { 420 fatal_exit("shmat(%d): %s", id_ctl, strerror(errno)); 421 } 422 stats = (struct ub_stats_info*)shmat(id_arr, NULL, 0); 423 if(stats == (void*)-1) { 424 fatal_exit("shmat(%d): %s", id_arr, strerror(errno)); 425 } 426 427 /* print the stats */ 428 do_stats_shm(cfg, stats, shm_stat); 429 430 /* shutdown */ 431 shmdt(shm_stat); 432 shmdt(stats); 433 config_delete(cfg); 434 #else 435 (void)cfgfile; 436 #endif /* HAVE_SHMGET */ 437 } 438 439 /** exit with ssl error */ 440 static void ssl_err(const char* s) 441 { 442 fprintf(stderr, "error: %s\n", s); 443 ERR_print_errors_fp(stderr); 444 exit(1); 445 } 446 447 /** setup SSL context */ 448 static SSL_CTX* 449 setup_ctx(struct config_file* cfg) 450 { 451 char* s_cert=NULL, *c_key=NULL, *c_cert=NULL; 452 SSL_CTX* ctx; 453 454 if(!(options_remote_is_address(cfg) && cfg->control_use_cert)) 455 return NULL; 456 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1); 457 c_key = fname_after_chroot(cfg->control_key_file, cfg, 1); 458 c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1); 459 if(!s_cert || !c_key || !c_cert) 460 fatal_exit("out of memory"); 461 ctx = SSL_CTX_new(SSLv23_client_method()); 462 if(!ctx) 463 ssl_err("could not allocate SSL_CTX pointer"); 464 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 465 != SSL_OP_NO_SSLv2) 466 ssl_err("could not set SSL_OP_NO_SSLv2"); 467 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 468 != SSL_OP_NO_SSLv3) 469 ssl_err("could not set SSL_OP_NO_SSLv3"); 470 if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert) || 471 !SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM) 472 || !SSL_CTX_check_private_key(ctx)) 473 ssl_err("Error setting up SSL_CTX client key and cert"); 474 if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1) 475 ssl_err("Error setting up SSL_CTX verify, server cert"); 476 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 477 478 free(s_cert); 479 free(c_key); 480 free(c_cert); 481 return ctx; 482 } 483 484 /** contact the server with TCP connect */ 485 static int 486 contact_server(const char* svr, struct config_file* cfg, int statuscmd) 487 { 488 struct sockaddr_storage addr; 489 socklen_t addrlen; 490 int addrfamily = 0, proto = IPPROTO_TCP; 491 int fd, useport = 1; 492 /* use svr or the first config entry */ 493 if(!svr) { 494 if(cfg->control_ifs.first) { 495 svr = cfg->control_ifs.first->str; 496 } else if(cfg->do_ip4) { 497 svr = "127.0.0.1"; 498 } else { 499 svr = "::1"; 500 } 501 /* config 0 addr (everything), means ask localhost */ 502 if(strcmp(svr, "0.0.0.0") == 0) 503 svr = "127.0.0.1"; 504 else if(strcmp(svr, "::0") == 0 || 505 strcmp(svr, "0::0") == 0 || 506 strcmp(svr, "0::") == 0 || 507 strcmp(svr, "::") == 0) 508 svr = "::1"; 509 } 510 if(strchr(svr, '@')) { 511 if(!extstrtoaddr(svr, &addr, &addrlen)) 512 fatal_exit("could not parse IP@port: %s", svr); 513 #ifdef HAVE_SYS_UN_H 514 } else if(svr[0] == '/') { 515 struct sockaddr_un* usock = (struct sockaddr_un *) &addr; 516 usock->sun_family = AF_LOCAL; 517 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 518 usock->sun_len = (unsigned)sizeof(usock); 519 #endif 520 (void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path)); 521 addrlen = (socklen_t)sizeof(struct sockaddr_un); 522 addrfamily = AF_LOCAL; 523 useport = 0; 524 proto = 0; 525 #endif 526 } else { 527 if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen)) 528 fatal_exit("could not parse IP: %s", svr); 529 } 530 531 if(addrfamily == 0) 532 addrfamily = addr_is_ip6(&addr, addrlen)?PF_INET6:PF_INET; 533 fd = socket(addrfamily, SOCK_STREAM, proto); 534 if(fd == -1) { 535 #ifndef USE_WINSOCK 536 fatal_exit("socket: %s", strerror(errno)); 537 #else 538 fatal_exit("socket: %s", wsa_strerror(WSAGetLastError())); 539 #endif 540 } 541 if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) { 542 #ifndef USE_WINSOCK 543 int err = errno; 544 if(!useport) log_err("connect: %s for %s", strerror(err), svr); 545 else log_err_addr("connect", strerror(err), &addr, addrlen); 546 if(err == ECONNREFUSED && statuscmd) { 547 printf("unbound is stopped\n"); 548 exit(3); 549 } 550 #else 551 int wsaerr = WSAGetLastError(); 552 if(!useport) log_err("connect: %s for %s", wsa_strerror(wsaerr), svr); 553 else log_err_addr("connect", wsa_strerror(wsaerr), &addr, addrlen); 554 if(wsaerr == WSAECONNREFUSED && statuscmd) { 555 printf("unbound is stopped\n"); 556 exit(3); 557 } 558 #endif 559 exit(1); 560 } 561 return fd; 562 } 563 564 /** setup SSL on the connection */ 565 static SSL* 566 setup_ssl(SSL_CTX* ctx, int fd) 567 { 568 SSL* ssl; 569 X509* x; 570 int r; 571 572 if(!ctx) return NULL; 573 ssl = SSL_new(ctx); 574 if(!ssl) 575 ssl_err("could not SSL_new"); 576 SSL_set_connect_state(ssl); 577 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 578 if(!SSL_set_fd(ssl, fd)) 579 ssl_err("could not SSL_set_fd"); 580 while(1) { 581 ERR_clear_error(); 582 if( (r=SSL_do_handshake(ssl)) == 1) 583 break; 584 r = SSL_get_error(ssl, r); 585 if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE) 586 ssl_err("SSL handshake failed"); 587 /* wants to be called again */ 588 } 589 590 /* check authenticity of server */ 591 if(SSL_get_verify_result(ssl) != X509_V_OK) 592 ssl_err("SSL verification failed"); 593 x = SSL_get_peer_certificate(ssl); 594 if(!x) 595 ssl_err("Server presented no peer certificate"); 596 X509_free(x); 597 598 return ssl; 599 } 600 601 /** read from ssl or fd, fatalexit on error, 0 EOF, 1 success */ 602 static int 603 remote_read(SSL* ssl, int fd, char* buf, size_t len) 604 { 605 if(ssl) { 606 int r; 607 ERR_clear_error(); 608 if((r = SSL_read(ssl, buf, (int)len-1)) <= 0) { 609 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 610 /* EOF */ 611 return 0; 612 } 613 ssl_err("could not SSL_read"); 614 } 615 buf[r] = 0; 616 } else { 617 ssize_t rr = recv(fd, buf, len-1, 0); 618 if(rr <= 0) { 619 if(rr == 0) { 620 /* EOF */ 621 return 0; 622 } 623 #ifndef USE_WINSOCK 624 fatal_exit("could not recv: %s", strerror(errno)); 625 #else 626 fatal_exit("could not recv: %s", wsa_strerror(WSAGetLastError())); 627 #endif 628 } 629 buf[rr] = 0; 630 } 631 return 1; 632 } 633 634 /** write to ssl or fd, fatalexit on error */ 635 static void 636 remote_write(SSL* ssl, int fd, const char* buf, size_t len) 637 { 638 if(ssl) { 639 if(SSL_write(ssl, buf, (int)len) <= 0) 640 ssl_err("could not SSL_write"); 641 } else { 642 if(send(fd, buf, len, 0) < (ssize_t)len) { 643 #ifndef USE_WINSOCK 644 fatal_exit("could not send: %s", strerror(errno)); 645 #else 646 fatal_exit("could not send: %s", wsa_strerror(WSAGetLastError())); 647 #endif 648 } 649 } 650 } 651 652 /** send stdin to server */ 653 static void 654 send_file(SSL* ssl, int fd, FILE* in, char* buf, size_t sz) 655 { 656 while(fgets(buf, (int)sz, in)) { 657 remote_write(ssl, fd, buf, strlen(buf)); 658 } 659 } 660 661 /** send end-of-file marker to server */ 662 static void 663 send_eof(SSL* ssl, int fd) 664 { 665 char e[] = {0x04, 0x0a}; 666 remote_write(ssl, fd, e, sizeof(e)); 667 } 668 669 /** send command and display result */ 670 static int 671 go_cmd(SSL* ssl, int fd, int quiet, int argc, char* argv[]) 672 { 673 char pre[10]; 674 const char* space=" "; 675 const char* newline="\n"; 676 int was_error = 0, first_line = 1; 677 int i; 678 char buf[1024]; 679 snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION); 680 remote_write(ssl, fd, pre, strlen(pre)); 681 for(i=0; i<argc; i++) { 682 remote_write(ssl, fd, space, strlen(space)); 683 remote_write(ssl, fd, argv[i], strlen(argv[i])); 684 } 685 remote_write(ssl, fd, newline, strlen(newline)); 686 687 if(argc == 1 && strcmp(argv[0], "load_cache") == 0) { 688 send_file(ssl, fd, stdin, buf, sizeof(buf)); 689 } 690 else if(argc == 1 && (strcmp(argv[0], "local_zones") == 0 || 691 strcmp(argv[0], "local_zones_remove") == 0 || 692 strcmp(argv[0], "local_datas") == 0 || 693 strcmp(argv[0], "local_datas_remove") == 0)) { 694 send_file(ssl, fd, stdin, buf, sizeof(buf)); 695 send_eof(ssl, fd); 696 } 697 698 while(1) { 699 if(remote_read(ssl, fd, buf, sizeof(buf)) == 0) { 700 break; /* EOF */ 701 } 702 if(first_line && strncmp(buf, "error", 5) == 0) { 703 printf("%s", buf); 704 was_error = 1; 705 } else if (!quiet) 706 printf("%s", buf); 707 708 first_line = 0; 709 } 710 return was_error; 711 } 712 713 /** go ahead and read config, contact server and perform command and display */ 714 static int 715 go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[]) 716 { 717 struct config_file* cfg; 718 int fd, ret; 719 SSL_CTX* ctx; 720 SSL* ssl; 721 722 /* read config */ 723 if(!(cfg = config_create())) 724 fatal_exit("out of memory"); 725 if(!config_read(cfg, cfgfile, NULL)) 726 fatal_exit("could not read config file"); 727 if(!cfg->remote_control_enable) 728 log_warn("control-enable is 'no' in the config file."); 729 #ifdef UB_ON_WINDOWS 730 w_config_adjust_directory(cfg); 731 #endif 732 ctx = setup_ctx(cfg); 733 734 /* contact server */ 735 fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0); 736 ssl = setup_ssl(ctx, fd); 737 738 /* send command */ 739 ret = go_cmd(ssl, fd, quiet, argc, argv); 740 741 if(ssl) SSL_free(ssl); 742 #ifndef USE_WINSOCK 743 close(fd); 744 #else 745 closesocket(fd); 746 #endif 747 if(ctx) SSL_CTX_free(ctx); 748 config_delete(cfg); 749 return ret; 750 } 751 752 /** getopt global, in case header files fail to declare it. */ 753 extern int optind; 754 /** getopt global, in case header files fail to declare it. */ 755 extern char* optarg; 756 757 /** Main routine for unbound-control */ 758 int main(int argc, char* argv[]) 759 { 760 int c, ret; 761 int quiet = 0; 762 const char* cfgfile = CONFIGFILE; 763 char* svr = NULL; 764 #ifdef USE_WINSOCK 765 int r; 766 WSADATA wsa_data; 767 #endif 768 #ifdef USE_THREAD_DEBUG 769 /* stop the file output from unbound-control, overwrites the servers */ 770 extern int check_locking_order; 771 check_locking_order = 0; 772 #endif /* USE_THREAD_DEBUG */ 773 log_ident_set("unbound-control"); 774 log_init(NULL, 0, NULL); 775 checklock_start(); 776 #ifdef USE_WINSOCK 777 /* use registry config file in preference to compiletime location */ 778 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 779 cfgfile = CONFIGFILE; 780 #endif 781 /* parse the options */ 782 while( (c=getopt(argc, argv, "c:s:qh")) != -1) { 783 switch(c) { 784 case 'c': 785 cfgfile = optarg; 786 break; 787 case 's': 788 svr = optarg; 789 break; 790 case 'q': 791 quiet = 1; 792 break; 793 case '?': 794 case 'h': 795 default: 796 usage(); 797 } 798 } 799 argc -= optind; 800 argv += optind; 801 if(argc == 0) 802 usage(); 803 if(argc >= 1 && strcmp(argv[0], "start")==0) { 804 if(execlp("unbound", "unbound", "-c", cfgfile, 805 (char*)NULL) < 0) { 806 fatal_exit("could not exec unbound: %s", 807 strerror(errno)); 808 } 809 } 810 if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) { 811 print_stats_shm(cfgfile); 812 return 0; 813 } 814 815 #ifdef USE_WINSOCK 816 if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0) 817 fatal_exit("WSAStartup failed: %s", wsa_strerror(r)); 818 #endif 819 820 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS 821 ERR_load_crypto_strings(); 822 #endif 823 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 824 ERR_load_SSL_strings(); 825 #endif 826 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO) 827 OpenSSL_add_all_algorithms(); 828 #else 829 OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS 830 | OPENSSL_INIT_ADD_ALL_DIGESTS 831 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 832 #endif 833 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 834 (void)SSL_library_init(); 835 #else 836 (void)OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 837 #endif 838 839 if(!RAND_status()) { 840 /* try to seed it */ 841 unsigned char buf[256]; 842 unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid(); 843 unsigned int v = seed; 844 size_t i; 845 for(i=0; i<256/sizeof(v); i++) { 846 memmove(buf+i*sizeof(v), &v, sizeof(v)); 847 v = v*seed + (unsigned int)i; 848 } 849 RAND_seed(buf, 256); 850 log_warn("no entropy, seeding openssl PRNG with time\n"); 851 } 852 853 ret = go(cfgfile, svr, quiet, argc, argv); 854 855 #ifdef USE_WINSOCK 856 WSACleanup(); 857 #endif 858 checklock_stop(); 859 return ret; 860 } 861