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 static void usage(void) ATTR_NORETURN; 77 static void ssl_err(const char* s) ATTR_NORETURN; 78 static void ssl_path_err(const char* s, const char *path) ATTR_NORETURN; 79 80 /** Give unbound-control usage, and exit (1). */ 81 static void 82 usage(void) 83 { 84 printf("Usage: local-unbound-control [options] command\n"); 85 printf(" Remote control utility for unbound server.\n"); 86 printf("Options:\n"); 87 printf(" -c file config file, default is %s\n", CONFIGFILE); 88 printf(" -s ip[@port] server address, if omitted config is used.\n"); 89 printf(" -q quiet (don't print anything if it works ok).\n"); 90 printf(" -h show this usage help.\n"); 91 printf("Commands:\n"); 92 printf(" start start server; runs unbound(8)\n"); 93 printf(" stop stops the server\n"); 94 printf(" reload reloads the server\n"); 95 printf(" (this flushes data, stats, requestlist)\n"); 96 printf(" stats print statistics\n"); 97 printf(" stats_noreset peek at statistics\n"); 98 #ifdef HAVE_SHMGET 99 printf(" stats_shm print statistics using shm\n"); 100 #endif 101 printf(" status display status of server\n"); 102 printf(" verbosity <number> change logging detail\n"); 103 printf(" log_reopen close and open the logfile\n"); 104 printf(" local_zone <name> <type> add new local zone\n"); 105 printf(" local_zone_remove <name> remove local zone and its contents\n"); 106 printf(" local_data <RR data...> add local data, for example\n"); 107 printf(" local_data www.example.com A 192.0.2.1\n"); 108 printf(" local_data_remove <name> remove local RR data from name\n"); 109 printf(" local_zones, local_zones_remove, local_datas, local_datas_remove\n"); 110 printf(" same, but read list from stdin\n"); 111 printf(" (one entry per line).\n"); 112 printf(" dump_cache print cache to stdout\n"); 113 printf(" load_cache load cache from stdin\n"); 114 printf(" lookup <name> print nameservers for name\n"); 115 printf(" flush <name> flushes common types for name from cache\n"); 116 printf(" types: A, AAAA, MX, PTR, NS,\n"); 117 printf(" SOA, CNAME, DNAME, SRV, NAPTR\n"); 118 printf(" flush_type <name> <type> flush name, type from cache\n"); 119 printf(" flush_zone <name> flush everything at or under name\n"); 120 printf(" from rr and dnssec caches\n"); 121 printf(" flush_bogus flush all bogus data\n"); 122 printf(" flush_negative flush all negative data\n"); 123 printf(" flush_stats flush statistics, make zero\n"); 124 printf(" flush_requestlist drop queries that are worked on\n"); 125 printf(" dump_requestlist show what is worked on by first thread\n"); 126 printf(" flush_infra [all | ip] remove ping, edns for one IP or all\n"); 127 printf(" dump_infra show ping and edns entries\n"); 128 printf(" set_option opt: val set option to value, no reload\n"); 129 printf(" get_option opt get option value\n"); 130 printf(" list_stubs list stub-zones and root hints in use\n"); 131 printf(" list_forwards list forward-zones in use\n"); 132 printf(" list_insecure list domain-insecure zones\n"); 133 printf(" list_local_zones list local-zones in use\n"); 134 printf(" list_local_data list local-data RRs in use\n"); 135 printf(" insecure_add zone add domain-insecure zone\n"); 136 printf(" insecure_remove zone remove domain-insecure zone\n"); 137 printf(" forward_add [+i] zone addr.. add forward-zone with servers\n"); 138 printf(" forward_remove [+i] zone remove forward zone\n"); 139 printf(" stub_add [+ip] zone addr.. add stub-zone with servers\n"); 140 printf(" stub_remove [+i] zone remove stub zone\n"); 141 printf(" +i also do dnssec insecure point\n"); 142 printf(" +p set stub to use priming\n"); 143 printf(" forward [off | addr ...] without arg show forward setup\n"); 144 printf(" or off to turn off root forwarding\n"); 145 printf(" or give list of ip addresses\n"); 146 printf(" ratelimit_list [+a] list ratelimited domains\n"); 147 printf(" ip_ratelimit_list [+a] list ratelimited ip addresses\n"); 148 printf(" +a list all, also not ratelimited\n"); 149 printf(" list_auth_zones list auth zones\n"); 150 printf(" auth_zone_reload zone reload auth zone from zonefile\n"); 151 printf(" auth_zone_transfer zone transfer auth zone from master\n"); 152 printf(" view_list_local_zones view list local-zones in view\n"); 153 printf(" view_list_local_data view list local-data RRs in view\n"); 154 printf(" view_local_zone view name type add local-zone in view\n"); 155 printf(" view_local_zone_remove view name remove local-zone in view\n"); 156 printf(" view_local_data view RR... add local-data in view\n"); 157 printf(" view_local_datas view add list of local-data to view\n"); 158 printf(" one entry per line read from stdin\n"); 159 printf(" view_local_data_remove view name remove local-data in view\n"); 160 printf("Version %s\n", PACKAGE_VERSION); 161 printf("BSD licensed, see LICENSE in source package for details.\n"); 162 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 163 exit(1); 164 } 165 166 #ifdef HAVE_SHMGET 167 /** what to put on statistics lines between var and value, ": " or "=" */ 168 #define SQ "=" 169 /** if true, inhibits a lot of =0 lines from the stats output */ 170 static const int inhibit_zero = 1; 171 /** divide sum of timers to get average */ 172 static void 173 timeval_divide(struct timeval* avg, const struct timeval* sum, long long d) 174 { 175 #ifndef S_SPLINT_S 176 size_t leftover; 177 if(d == 0) { 178 avg->tv_sec = 0; 179 avg->tv_usec = 0; 180 return; 181 } 182 avg->tv_sec = sum->tv_sec / d; 183 avg->tv_usec = sum->tv_usec / d; 184 /* handle fraction from seconds divide */ 185 leftover = sum->tv_sec - avg->tv_sec*d; 186 avg->tv_usec += (leftover*1000000)/d; 187 #endif 188 } 189 190 /** print unsigned long stats value */ 191 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var)); 192 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var)); 193 #define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var)); 194 #define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 195 (long long)var.tv_sec, (int)var.tv_usec); 196 #define PR_STATSTIME(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 197 (long long)var ## _sec, (int)var ## _usec); 198 #define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var)); 199 200 /** print stat block */ 201 static void pr_stats(const char* nm, struct ub_stats_info* s) 202 { 203 struct timeval sumwait, avg; 204 PR_UL_NM("num.queries", s->svr.num_queries); 205 PR_UL_NM("num.queries_ip_ratelimited", 206 s->svr.num_queries_ip_ratelimited); 207 PR_UL_NM("num.cachehits", 208 s->svr.num_queries - s->svr.num_queries_missed_cache); 209 PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache); 210 PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch); 211 PR_UL_NM("num.zero_ttl", s->svr.zero_ttl_responses); 212 PR_UL_NM("num.recursivereplies", s->mesh_replies_sent); 213 #ifdef USE_DNSCRYPT 214 PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted); 215 PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert); 216 PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext); 217 PR_UL_NM("num.dnscrypt.malformed", 218 s->svr.num_query_dnscrypt_crypted_malformed); 219 #endif /* USE_DNSCRYPT */ 220 printf("%s.requestlist.avg"SQ"%g\n", nm, 221 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)? 222 (double)s->svr.sum_query_list_size/ 223 (double)(s->svr.num_queries_missed_cache+ 224 s->svr.num_queries_prefetch) : 0.0); 225 PR_UL_NM("requestlist.max", s->svr.max_query_list_size); 226 PR_UL_NM("requestlist.overwritten", s->mesh_jostled); 227 PR_UL_NM("requestlist.exceeded", s->mesh_dropped); 228 PR_UL_NM("requestlist.current.all", s->mesh_num_states); 229 PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states); 230 #ifndef S_SPLINT_S 231 sumwait.tv_sec = s->mesh_replies_sum_wait_sec; 232 sumwait.tv_usec = s->mesh_replies_sum_wait_usec; 233 #endif 234 timeval_divide(&avg, &sumwait, s->mesh_replies_sent); 235 printf("%s.", nm); 236 PR_TIMEVAL("recursion.time.avg", avg); 237 printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median); 238 PR_UL_NM("tcpusage", s->svr.tcp_accept_usage); 239 } 240 241 /** print uptime */ 242 static void print_uptime(struct ub_shm_stat_info* shm_stat) 243 { 244 PR_STATSTIME("time.now", shm_stat->time.now); 245 PR_STATSTIME("time.up", shm_stat->time.up); 246 PR_STATSTIME("time.elapsed", shm_stat->time.elapsed); 247 } 248 249 /** print memory usage */ 250 static void print_mem(struct ub_shm_stat_info* shm_stat, 251 struct ub_stats_info* s) 252 { 253 PR_LL("mem.cache.rrset", shm_stat->mem.rrset); 254 PR_LL("mem.cache.message", shm_stat->mem.msg); 255 PR_LL("mem.mod.iterator", shm_stat->mem.iter); 256 PR_LL("mem.mod.validator", shm_stat->mem.val); 257 PR_LL("mem.mod.respip", shm_stat->mem.respip); 258 #ifdef CLIENT_SUBNET 259 PR_LL("mem.mod.subnet", shm_stat->mem.subnet); 260 #endif 261 #ifdef USE_IPSECMOD 262 PR_LL("mem.mod.ipsecmod", shm_stat->mem.ipsecmod); 263 #endif 264 #ifdef USE_DNSCRYPT 265 PR_LL("mem.cache.dnscrypt_shared_secret", 266 shm_stat->mem.dnscrypt_shared_secret); 267 PR_LL("mem.cache.dnscrypt_nonce", 268 shm_stat->mem.dnscrypt_nonce); 269 #endif 270 PR_LL("mem.streamwait", s->svr.mem_stream_wait); 271 } 272 273 /** print histogram */ 274 static void print_hist(struct ub_stats_info* s) 275 { 276 struct timehist* hist; 277 size_t i; 278 hist = timehist_setup(); 279 if(!hist) 280 fatal_exit("out of memory"); 281 timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST); 282 for(i=0; i<hist->num; i++) { 283 printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n", 284 (int)hist->buckets[i].lower.tv_sec, 285 (int)hist->buckets[i].lower.tv_usec, 286 (int)hist->buckets[i].upper.tv_sec, 287 (int)hist->buckets[i].upper.tv_usec, 288 (unsigned long)hist->buckets[i].count); 289 } 290 timehist_delete(hist); 291 } 292 293 /** print extended */ 294 static void print_extended(struct ub_stats_info* s) 295 { 296 int i; 297 char nm[16]; 298 299 /* TYPE */ 300 for(i=0; i<UB_STATS_QTYPE_NUM; i++) { 301 if(inhibit_zero && s->svr.qtype[i] == 0) 302 continue; 303 sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm)); 304 PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]); 305 } 306 if(!inhibit_zero || s->svr.qtype_big) { 307 PR_UL("num.query.type.other", s->svr.qtype_big); 308 } 309 310 /* CLASS */ 311 for(i=0; i<UB_STATS_QCLASS_NUM; i++) { 312 if(inhibit_zero && s->svr.qclass[i] == 0) 313 continue; 314 sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm)); 315 PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]); 316 } 317 if(!inhibit_zero || s->svr.qclass_big) { 318 PR_UL("num.query.class.other", s->svr.qclass_big); 319 } 320 321 /* OPCODE */ 322 for(i=0; i<UB_STATS_OPCODE_NUM; i++) { 323 if(inhibit_zero && s->svr.qopcode[i] == 0) 324 continue; 325 sldns_wire2str_opcode_buf(i, nm, sizeof(nm)); 326 PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]); 327 } 328 329 /* transport */ 330 PR_UL("num.query.tcp", s->svr.qtcp); 331 PR_UL("num.query.tcpout", s->svr.qtcp_outgoing); 332 PR_UL("num.query.tls", s->svr.qtls); 333 PR_UL("num.query.tls_resume", s->svr.qtls_resume); 334 PR_UL("num.query.ipv6", s->svr.qipv6); 335 336 /* flags */ 337 PR_UL("num.query.flags.QR", s->svr.qbit_QR); 338 PR_UL("num.query.flags.AA", s->svr.qbit_AA); 339 PR_UL("num.query.flags.TC", s->svr.qbit_TC); 340 PR_UL("num.query.flags.RD", s->svr.qbit_RD); 341 PR_UL("num.query.flags.RA", s->svr.qbit_RA); 342 PR_UL("num.query.flags.Z", s->svr.qbit_Z); 343 PR_UL("num.query.flags.AD", s->svr.qbit_AD); 344 PR_UL("num.query.flags.CD", s->svr.qbit_CD); 345 PR_UL("num.query.edns.present", s->svr.qEDNS); 346 PR_UL("num.query.edns.DO", s->svr.qEDNS_DO); 347 348 /* RCODE */ 349 for(i=0; i<UB_STATS_RCODE_NUM; i++) { 350 /* Always include RCODEs 0-5 */ 351 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0) 352 continue; 353 sldns_wire2str_rcode_buf(i, nm, sizeof(nm)); 354 PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]); 355 } 356 if(!inhibit_zero || s->svr.ans_rcode_nodata) { 357 PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata); 358 } 359 /* iteration */ 360 PR_UL("num.query.ratelimited", s->svr.queries_ratelimited); 361 /* validation */ 362 PR_UL("num.answer.secure", s->svr.ans_secure); 363 PR_UL("num.answer.bogus", s->svr.ans_bogus); 364 PR_UL("num.rrset.bogus", s->svr.rrset_bogus); 365 PR_UL("num.query.aggressive.NOERROR", s->svr.num_neg_cache_noerror); 366 PR_UL("num.query.aggressive.NXDOMAIN", s->svr.num_neg_cache_nxdomain); 367 /* threat detection */ 368 PR_UL("unwanted.queries", s->svr.unwanted_queries); 369 PR_UL("unwanted.replies", s->svr.unwanted_replies); 370 /* cache counts */ 371 PR_UL("msg.cache.count", s->svr.msg_cache_count); 372 PR_UL("rrset.cache.count", s->svr.rrset_cache_count); 373 PR_UL("infra.cache.count", s->svr.infra_cache_count); 374 PR_UL("key.cache.count", s->svr.key_cache_count); 375 #ifdef USE_DNSCRYPT 376 PR_UL("dnscrypt_shared_secret.cache.count", 377 s->svr.shared_secret_cache_count); 378 PR_UL("num.query.dnscrypt.shared_secret.cachemiss", 379 s->svr.num_query_dnscrypt_secret_missed_cache); 380 PR_UL("dnscrypt_nonce.cache.count", s->svr.nonce_cache_count); 381 PR_UL("num.query.dnscrypt.replay", 382 s->svr.num_query_dnscrypt_replay); 383 #endif /* USE_DNSCRYPT */ 384 PR_UL("num.query.authzone.up", s->svr.num_query_authzone_up); 385 PR_UL("num.query.authzone.down", s->svr.num_query_authzone_down); 386 #ifdef CLIENT_SUBNET 387 PR_UL("num.query.subnet", s->svr.num_query_subnet); 388 PR_UL("num.query.subnet_cache", s->svr.num_query_subnet_cache); 389 #endif 390 } 391 392 /** print statistics out of memory structures */ 393 static void do_stats_shm(struct config_file* cfg, struct ub_stats_info* stats, 394 struct ub_shm_stat_info* shm_stat) 395 { 396 int i; 397 char nm[32]; 398 for(i=0; i<cfg->num_threads; i++) { 399 snprintf(nm, sizeof(nm), "thread%d", i); 400 pr_stats(nm, &stats[i+1]); 401 } 402 pr_stats("total", &stats[0]); 403 print_uptime(shm_stat); 404 if(cfg->stat_extended) { 405 print_mem(shm_stat, &stats[0]); 406 print_hist(stats); 407 print_extended(stats); 408 } 409 } 410 #endif /* HAVE_SHMGET */ 411 412 /** print statistics from shm memory segment */ 413 static void print_stats_shm(const char* cfgfile) 414 { 415 #ifdef HAVE_SHMGET 416 struct config_file* cfg; 417 struct ub_stats_info* stats; 418 struct ub_shm_stat_info* shm_stat; 419 int id_ctl, id_arr; 420 /* read config */ 421 if(!(cfg = config_create())) 422 fatal_exit("out of memory"); 423 if(!config_read(cfg, cfgfile, NULL)) 424 fatal_exit("could not read config file"); 425 /* get shm segments */ 426 id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R|SHM_W); 427 if(id_ctl == -1) { 428 fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno)); 429 } 430 id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R|SHM_W); 431 if(id_arr == -1) { 432 fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno)); 433 } 434 shm_stat = (struct ub_shm_stat_info*)shmat(id_ctl, NULL, 0); 435 if(shm_stat == (void*)-1) { 436 fatal_exit("shmat(%d): %s", id_ctl, strerror(errno)); 437 } 438 stats = (struct ub_stats_info*)shmat(id_arr, NULL, 0); 439 if(stats == (void*)-1) { 440 fatal_exit("shmat(%d): %s", id_arr, strerror(errno)); 441 } 442 443 /* print the stats */ 444 do_stats_shm(cfg, stats, shm_stat); 445 446 /* shutdown */ 447 shmdt(shm_stat); 448 shmdt(stats); 449 config_delete(cfg); 450 #else 451 (void)cfgfile; 452 #endif /* HAVE_SHMGET */ 453 } 454 455 /** exit with ssl error */ 456 static void ssl_err(const char* s) 457 { 458 fprintf(stderr, "error: %s\n", s); 459 ERR_print_errors_fp(stderr); 460 exit(1); 461 } 462 463 /** exit with ssl error related to a file path */ 464 static void ssl_path_err(const char* s, const char *path) 465 { 466 unsigned long err; 467 err = ERR_peek_error(); 468 if (ERR_GET_LIB(err) == ERR_LIB_SYS && 469 (ERR_GET_FUNC(err) == SYS_F_FOPEN || 470 ERR_GET_FUNC(err) == SYS_F_FREAD) ) { 471 fprintf(stderr, "error: %s\n%s: %s\n", 472 s, path, ERR_reason_error_string(err)); 473 exit(1); 474 } else { 475 ssl_err(s); 476 } 477 } 478 479 /** setup SSL context */ 480 static SSL_CTX* 481 setup_ctx(struct config_file* cfg) 482 { 483 char* s_cert=NULL, *c_key=NULL, *c_cert=NULL; 484 SSL_CTX* ctx; 485 486 if(!(options_remote_is_address(cfg) && cfg->control_use_cert)) 487 return NULL; 488 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1); 489 c_key = fname_after_chroot(cfg->control_key_file, cfg, 1); 490 c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1); 491 if(!s_cert || !c_key || !c_cert) 492 fatal_exit("out of memory"); 493 ctx = SSL_CTX_new(SSLv23_client_method()); 494 if(!ctx) 495 ssl_err("could not allocate SSL_CTX pointer"); 496 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 497 != SSL_OP_NO_SSLv2) 498 ssl_err("could not set SSL_OP_NO_SSLv2"); 499 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 500 != SSL_OP_NO_SSLv3) 501 ssl_err("could not set SSL_OP_NO_SSLv3"); 502 if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert)) 503 ssl_path_err("Error setting up SSL_CTX client cert", c_cert); 504 if (!SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM)) 505 ssl_path_err("Error setting up SSL_CTX client key", c_key); 506 if (!SSL_CTX_check_private_key(ctx)) 507 ssl_err("Error setting up SSL_CTX client key"); 508 if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1) 509 ssl_path_err("Error setting up SSL_CTX verify, server cert", 510 s_cert); 511 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 512 513 free(s_cert); 514 free(c_key); 515 free(c_cert); 516 return ctx; 517 } 518 519 /** contact the server with TCP connect */ 520 static int 521 contact_server(const char* svr, struct config_file* cfg, int statuscmd) 522 { 523 struct sockaddr_storage addr; 524 socklen_t addrlen; 525 int addrfamily = 0, proto = IPPROTO_TCP; 526 int fd, useport = 1; 527 /* use svr or the first config entry */ 528 if(!svr) { 529 if(cfg->control_ifs.first) { 530 svr = cfg->control_ifs.first->str; 531 } else if(cfg->do_ip4) { 532 svr = "127.0.0.1"; 533 } else { 534 svr = "::1"; 535 } 536 /* config 0 addr (everything), means ask localhost */ 537 if(strcmp(svr, "0.0.0.0") == 0) 538 svr = "127.0.0.1"; 539 else if(strcmp(svr, "::0") == 0 || 540 strcmp(svr, "0::0") == 0 || 541 strcmp(svr, "0::") == 0 || 542 strcmp(svr, "::") == 0) 543 svr = "::1"; 544 } 545 if(strchr(svr, '@')) { 546 if(!extstrtoaddr(svr, &addr, &addrlen)) 547 fatal_exit("could not parse IP@port: %s", svr); 548 #ifdef HAVE_SYS_UN_H 549 } else if(svr[0] == '/') { 550 struct sockaddr_un* usock = (struct sockaddr_un *) &addr; 551 usock->sun_family = AF_LOCAL; 552 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 553 usock->sun_len = (unsigned)sizeof(usock); 554 #endif 555 (void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path)); 556 addrlen = (socklen_t)sizeof(struct sockaddr_un); 557 addrfamily = AF_LOCAL; 558 useport = 0; 559 proto = 0; 560 #endif 561 } else { 562 if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen)) 563 fatal_exit("could not parse IP: %s", svr); 564 } 565 566 if(addrfamily == 0) 567 addrfamily = addr_is_ip6(&addr, addrlen)?PF_INET6:PF_INET; 568 fd = socket(addrfamily, SOCK_STREAM, proto); 569 if(fd == -1) { 570 #ifndef USE_WINSOCK 571 fatal_exit("socket: %s", strerror(errno)); 572 #else 573 fatal_exit("socket: %s", wsa_strerror(WSAGetLastError())); 574 #endif 575 } 576 if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) { 577 #ifndef USE_WINSOCK 578 int err = errno; 579 if(!useport) log_err("connect: %s for %s", strerror(err), svr); 580 else log_err_addr("connect", strerror(err), &addr, addrlen); 581 if(err == ECONNREFUSED && statuscmd) { 582 printf("unbound is stopped\n"); 583 exit(3); 584 } 585 #else 586 int wsaerr = WSAGetLastError(); 587 if(!useport) log_err("connect: %s for %s", wsa_strerror(wsaerr), svr); 588 else log_err_addr("connect", wsa_strerror(wsaerr), &addr, addrlen); 589 if(wsaerr == WSAECONNREFUSED && statuscmd) { 590 printf("unbound is stopped\n"); 591 exit(3); 592 } 593 #endif 594 exit(1); 595 } 596 return fd; 597 } 598 599 /** setup SSL on the connection */ 600 static SSL* 601 setup_ssl(SSL_CTX* ctx, int fd) 602 { 603 SSL* ssl; 604 X509* x; 605 int r; 606 607 if(!ctx) return NULL; 608 ssl = SSL_new(ctx); 609 if(!ssl) 610 ssl_err("could not SSL_new"); 611 SSL_set_connect_state(ssl); 612 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 613 if(!SSL_set_fd(ssl, fd)) 614 ssl_err("could not SSL_set_fd"); 615 while(1) { 616 ERR_clear_error(); 617 if( (r=SSL_do_handshake(ssl)) == 1) 618 break; 619 r = SSL_get_error(ssl, r); 620 if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE) 621 ssl_err("SSL handshake failed"); 622 /* wants to be called again */ 623 } 624 625 /* check authenticity of server */ 626 if(SSL_get_verify_result(ssl) != X509_V_OK) 627 ssl_err("SSL verification failed"); 628 x = SSL_get_peer_certificate(ssl); 629 if(!x) 630 ssl_err("Server presented no peer certificate"); 631 X509_free(x); 632 633 return ssl; 634 } 635 636 /** read from ssl or fd, fatalexit on error, 0 EOF, 1 success */ 637 static int 638 remote_read(SSL* ssl, int fd, char* buf, size_t len) 639 { 640 if(ssl) { 641 int r; 642 ERR_clear_error(); 643 if((r = SSL_read(ssl, buf, (int)len-1)) <= 0) { 644 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 645 /* EOF */ 646 return 0; 647 } 648 ssl_err("could not SSL_read"); 649 } 650 buf[r] = 0; 651 } else { 652 ssize_t rr = recv(fd, buf, len-1, 0); 653 if(rr <= 0) { 654 if(rr == 0) { 655 /* EOF */ 656 return 0; 657 } 658 #ifndef USE_WINSOCK 659 fatal_exit("could not recv: %s", strerror(errno)); 660 #else 661 fatal_exit("could not recv: %s", wsa_strerror(WSAGetLastError())); 662 #endif 663 } 664 buf[rr] = 0; 665 } 666 return 1; 667 } 668 669 /** write to ssl or fd, fatalexit on error */ 670 static void 671 remote_write(SSL* ssl, int fd, const char* buf, size_t len) 672 { 673 if(ssl) { 674 if(SSL_write(ssl, buf, (int)len) <= 0) 675 ssl_err("could not SSL_write"); 676 } else { 677 if(send(fd, buf, len, 0) < (ssize_t)len) { 678 #ifndef USE_WINSOCK 679 fatal_exit("could not send: %s", strerror(errno)); 680 #else 681 fatal_exit("could not send: %s", wsa_strerror(WSAGetLastError())); 682 #endif 683 } 684 } 685 } 686 687 /** send stdin to server */ 688 static void 689 send_file(SSL* ssl, int fd, FILE* in, char* buf, size_t sz) 690 { 691 while(fgets(buf, (int)sz, in)) { 692 remote_write(ssl, fd, buf, strlen(buf)); 693 } 694 } 695 696 /** send end-of-file marker to server */ 697 static void 698 send_eof(SSL* ssl, int fd) 699 { 700 char e[] = {0x04, 0x0a}; 701 remote_write(ssl, fd, e, sizeof(e)); 702 } 703 704 /** send command and display result */ 705 static int 706 go_cmd(SSL* ssl, int fd, int quiet, int argc, char* argv[]) 707 { 708 char pre[10]; 709 const char* space=" "; 710 const char* newline="\n"; 711 int was_error = 0, first_line = 1; 712 int i; 713 char buf[1024]; 714 snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION); 715 remote_write(ssl, fd, pre, strlen(pre)); 716 for(i=0; i<argc; i++) { 717 remote_write(ssl, fd, space, strlen(space)); 718 remote_write(ssl, fd, argv[i], strlen(argv[i])); 719 } 720 remote_write(ssl, fd, newline, strlen(newline)); 721 722 if(argc == 1 && strcmp(argv[0], "load_cache") == 0) { 723 send_file(ssl, fd, stdin, buf, sizeof(buf)); 724 } 725 else if(argc >= 1 && (strcmp(argv[0], "local_zones") == 0 || 726 strcmp(argv[0], "local_zones_remove") == 0 || 727 strcmp(argv[0], "local_datas") == 0 || 728 strcmp(argv[0], "view_local_datas") == 0 || 729 strcmp(argv[0], "local_datas_remove") == 0)) { 730 send_file(ssl, fd, stdin, buf, sizeof(buf)); 731 send_eof(ssl, fd); 732 } 733 734 while(1) { 735 if(remote_read(ssl, fd, buf, sizeof(buf)) == 0) { 736 break; /* EOF */ 737 } 738 if(first_line && strncmp(buf, "error", 5) == 0) { 739 printf("%s", buf); 740 was_error = 1; 741 } else if (!quiet) 742 printf("%s", buf); 743 744 first_line = 0; 745 } 746 return was_error; 747 } 748 749 /** go ahead and read config, contact server and perform command and display */ 750 static int 751 go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[]) 752 { 753 struct config_file* cfg; 754 int fd, ret; 755 SSL_CTX* ctx; 756 SSL* ssl; 757 758 /* read config */ 759 if(!(cfg = config_create())) 760 fatal_exit("out of memory"); 761 if(!config_read(cfg, cfgfile, NULL)) 762 fatal_exit("could not read config file"); 763 if(!cfg->remote_control_enable) 764 log_warn("control-enable is 'no' in the config file."); 765 #ifdef UB_ON_WINDOWS 766 w_config_adjust_directory(cfg); 767 #endif 768 ctx = setup_ctx(cfg); 769 770 /* contact server */ 771 fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0); 772 ssl = setup_ssl(ctx, fd); 773 774 /* send command */ 775 ret = go_cmd(ssl, fd, quiet, argc, argv); 776 777 if(ssl) SSL_free(ssl); 778 #ifndef USE_WINSOCK 779 close(fd); 780 #else 781 closesocket(fd); 782 #endif 783 if(ctx) SSL_CTX_free(ctx); 784 config_delete(cfg); 785 return ret; 786 } 787 788 /** getopt global, in case header files fail to declare it. */ 789 extern int optind; 790 /** getopt global, in case header files fail to declare it. */ 791 extern char* optarg; 792 793 /** Main routine for unbound-control */ 794 int main(int argc, char* argv[]) 795 { 796 int c, ret; 797 int quiet = 0; 798 const char* cfgfile = CONFIGFILE; 799 char* svr = NULL; 800 #ifdef USE_WINSOCK 801 int r; 802 WSADATA wsa_data; 803 #endif 804 #ifdef USE_THREAD_DEBUG 805 /* stop the file output from unbound-control, overwrites the servers */ 806 extern int check_locking_order; 807 check_locking_order = 0; 808 #endif /* USE_THREAD_DEBUG */ 809 log_ident_set("unbound-control"); 810 log_init(NULL, 0, NULL); 811 checklock_start(); 812 #ifdef USE_WINSOCK 813 /* use registry config file in preference to compiletime location */ 814 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 815 cfgfile = CONFIGFILE; 816 #endif 817 /* parse the options */ 818 while( (c=getopt(argc, argv, "c:s:qh")) != -1) { 819 switch(c) { 820 case 'c': 821 cfgfile = optarg; 822 break; 823 case 's': 824 svr = optarg; 825 break; 826 case 'q': 827 quiet = 1; 828 break; 829 case '?': 830 case 'h': 831 default: 832 usage(); 833 } 834 } 835 argc -= optind; 836 argv += optind; 837 if(argc == 0) 838 usage(); 839 if(argc >= 1 && strcmp(argv[0], "start")==0) { 840 if(execlp("unbound", "unbound", "-c", cfgfile, 841 (char*)NULL) < 0) { 842 fatal_exit("could not exec unbound: %s", 843 strerror(errno)); 844 } 845 } 846 if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) { 847 print_stats_shm(cfgfile); 848 return 0; 849 } 850 851 #ifdef USE_WINSOCK 852 if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0) 853 fatal_exit("WSAStartup failed: %s", wsa_strerror(r)); 854 #endif 855 856 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS 857 ERR_load_crypto_strings(); 858 #endif 859 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 860 ERR_load_SSL_strings(); 861 #endif 862 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO) 863 OpenSSL_add_all_algorithms(); 864 #else 865 OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS 866 | OPENSSL_INIT_ADD_ALL_DIGESTS 867 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 868 #endif 869 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 870 (void)SSL_library_init(); 871 #else 872 (void)OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 873 #endif 874 875 if(!RAND_status()) { 876 /* try to seed it */ 877 unsigned char buf[256]; 878 unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid(); 879 unsigned int v = seed; 880 size_t i; 881 for(i=0; i<256/sizeof(v); i++) { 882 memmove(buf+i*sizeof(v), &v, sizeof(v)); 883 v = v*seed + (unsigned int)i; 884 } 885 RAND_seed(buf, 256); 886 log_warn("no entropy, seeding openssl PRNG with time\n"); 887 } 888 889 ret = go(cfgfile, svr, quiet, argc, argv); 890 891 #ifdef USE_WINSOCK 892 WSACleanup(); 893 #endif 894 checklock_stop(); 895 return ret; 896 } 897