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