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 #include "services/rpz.h" 66 67 #ifdef HAVE_SYS_IPC_H 68 #include "sys/ipc.h" 69 #endif 70 #ifdef HAVE_SYS_SHM_H 71 #include "sys/shm.h" 72 #endif 73 #ifdef HAVE_SYS_UN_H 74 #include <sys/un.h> 75 #endif 76 77 static void usage(void) ATTR_NORETURN; 78 static void ssl_err(const char* s) ATTR_NORETURN; 79 static void ssl_path_err(const char* s, const char *path) ATTR_NORETURN; 80 81 /** Give unbound-control usage, and exit (1). */ 82 static void 83 usage(void) 84 { 85 printf("Usage: local-unbound-control [options] command\n"); 86 printf(" Remote control utility for unbound server.\n"); 87 printf("Options:\n"); 88 printf(" -c file config file, default is %s\n", CONFIGFILE); 89 printf(" -s ip[@port] server address, if omitted config is used.\n"); 90 printf(" -q quiet (don't print anything if it works ok).\n"); 91 printf(" -h show this usage help.\n"); 92 printf("Commands:\n"); 93 printf(" start start server; runs unbound(8)\n"); 94 printf(" stop stops the server\n"); 95 printf(" reload reloads the server\n"); 96 printf(" (this flushes data, stats, requestlist)\n"); 97 printf(" stats print statistics\n"); 98 printf(" stats_noreset peek at statistics\n"); 99 #ifdef HAVE_SHMGET 100 printf(" stats_shm print statistics using shm\n"); 101 #endif 102 printf(" status display status of server\n"); 103 printf(" verbosity <number> change logging detail\n"); 104 printf(" log_reopen close and open the logfile\n"); 105 printf(" local_zone <name> <type> add new local zone\n"); 106 printf(" local_zone_remove <name> remove local zone and its contents\n"); 107 printf(" local_data <RR data...> add local data, for example\n"); 108 printf(" local_data www.example.com A 192.0.2.1\n"); 109 printf(" local_data_remove <name> remove local RR data from name\n"); 110 printf(" local_zones, local_zones_remove, local_datas, local_datas_remove\n"); 111 printf(" same, but read list from stdin\n"); 112 printf(" (one entry per line).\n"); 113 printf(" dump_cache print cache to stdout\n"); 114 printf(" load_cache load cache from stdin\n"); 115 printf(" lookup <name> print nameservers for name\n"); 116 printf(" flush <name> flushes common types for name from cache\n"); 117 printf(" types: A, AAAA, MX, PTR, NS,\n"); 118 printf(" SOA, CNAME, DNAME, SRV, NAPTR\n"); 119 printf(" flush_type <name> <type> flush name, type from cache\n"); 120 printf(" flush_zone <name> flush everything at or under name\n"); 121 printf(" from rr and dnssec caches\n"); 122 printf(" flush_bogus flush all bogus data\n"); 123 printf(" flush_negative flush all negative data\n"); 124 printf(" flush_stats flush statistics, make zero\n"); 125 printf(" flush_requestlist drop queries that are worked on\n"); 126 printf(" dump_requestlist show what is worked on by first thread\n"); 127 printf(" flush_infra [all | ip] remove ping, edns for one IP or all\n"); 128 printf(" dump_infra show ping and edns entries\n"); 129 printf(" set_option opt: val set option to value, no reload\n"); 130 printf(" get_option opt get option value\n"); 131 printf(" list_stubs list stub-zones and root hints in use\n"); 132 printf(" list_forwards list forward-zones in use\n"); 133 printf(" list_insecure list domain-insecure zones\n"); 134 printf(" list_local_zones list local-zones in use\n"); 135 printf(" list_local_data list local-data RRs in use\n"); 136 printf(" insecure_add zone add domain-insecure zone\n"); 137 printf(" insecure_remove zone remove domain-insecure zone\n"); 138 printf(" forward_add [+i] zone addr.. add forward-zone with servers\n"); 139 printf(" forward_remove [+i] zone remove forward zone\n"); 140 printf(" stub_add [+ip] zone addr.. add stub-zone with servers\n"); 141 printf(" stub_remove [+i] zone remove stub zone\n"); 142 printf(" +i also do dnssec insecure point\n"); 143 printf(" +p set stub to use priming\n"); 144 printf(" forward [off | addr ...] without arg show forward setup\n"); 145 printf(" or off to turn off root forwarding\n"); 146 printf(" or give list of ip addresses\n"); 147 printf(" ratelimit_list [+a] list ratelimited domains\n"); 148 printf(" ip_ratelimit_list [+a] list ratelimited ip addresses\n"); 149 printf(" +a list all, also not ratelimited\n"); 150 printf(" list_auth_zones list auth zones\n"); 151 printf(" auth_zone_reload zone reload auth zone from zonefile\n"); 152 printf(" auth_zone_transfer zone transfer auth zone from master\n"); 153 printf(" view_list_local_zones view list local-zones in view\n"); 154 printf(" view_list_local_data view list local-data RRs in view\n"); 155 printf(" view_local_zone view name type add local-zone in view\n"); 156 printf(" view_local_zone_remove view name remove local-zone in view\n"); 157 printf(" view_local_data view RR... add local-data in view\n"); 158 printf(" view_local_datas view add list of local-data to view\n"); 159 printf(" one entry per line read from stdin\n"); 160 printf(" view_local_data_remove view name remove local-data in view\n"); 161 printf(" view_local_datas_remove view remove list of local-data from view\n"); 162 printf(" one entry per line read from stdin\n"); 163 printf("Version %s\n", PACKAGE_VERSION); 164 printf("BSD licensed, see LICENSE in source package for details.\n"); 165 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 166 exit(1); 167 } 168 169 #ifdef HAVE_SHMGET 170 /** what to put on statistics lines between var and value, ": " or "=" */ 171 #define SQ "=" 172 /** if true, inhibits a lot of =0 lines from the stats output */ 173 static const int inhibit_zero = 1; 174 /** divide sum of timers to get average */ 175 static void 176 timeval_divide(struct timeval* avg, const struct timeval* sum, long long d) 177 { 178 #ifndef S_SPLINT_S 179 size_t leftover; 180 if(d == 0) { 181 avg->tv_sec = 0; 182 avg->tv_usec = 0; 183 return; 184 } 185 avg->tv_sec = sum->tv_sec / d; 186 avg->tv_usec = sum->tv_usec / d; 187 /* handle fraction from seconds divide */ 188 leftover = sum->tv_sec - avg->tv_sec*d; 189 avg->tv_usec += (leftover*1000000)/d; 190 #endif 191 } 192 193 /** print unsigned long stats value */ 194 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var)); 195 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var)); 196 #define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var)); 197 #define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 198 (long long)var.tv_sec, (int)var.tv_usec); 199 #define PR_STATSTIME(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \ 200 (long long)var ## _sec, (int)var ## _usec); 201 #define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var)); 202 203 /** print stat block */ 204 static void pr_stats(const char* nm, struct ub_stats_info* s) 205 { 206 struct timeval sumwait, avg; 207 PR_UL_NM("num.queries", s->svr.num_queries); 208 PR_UL_NM("num.queries_ip_ratelimited", 209 s->svr.num_queries_ip_ratelimited); 210 PR_UL_NM("num.cachehits", 211 s->svr.num_queries - s->svr.num_queries_missed_cache); 212 PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache); 213 PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch); 214 PR_UL_NM("num.expired", s->svr.ans_expired); 215 PR_UL_NM("num.recursivereplies", s->mesh_replies_sent); 216 #ifdef USE_DNSCRYPT 217 PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted); 218 PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert); 219 PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext); 220 PR_UL_NM("num.dnscrypt.malformed", 221 s->svr.num_query_dnscrypt_crypted_malformed); 222 #endif /* USE_DNSCRYPT */ 223 printf("%s.requestlist.avg"SQ"%g\n", nm, 224 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)? 225 (double)s->svr.sum_query_list_size/ 226 (double)(s->svr.num_queries_missed_cache+ 227 s->svr.num_queries_prefetch) : 0.0); 228 PR_UL_NM("requestlist.max", s->svr.max_query_list_size); 229 PR_UL_NM("requestlist.overwritten", s->mesh_jostled); 230 PR_UL_NM("requestlist.exceeded", s->mesh_dropped); 231 PR_UL_NM("requestlist.current.all", s->mesh_num_states); 232 PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states); 233 #ifndef S_SPLINT_S 234 sumwait.tv_sec = s->mesh_replies_sum_wait_sec; 235 sumwait.tv_usec = s->mesh_replies_sum_wait_usec; 236 #endif 237 timeval_divide(&avg, &sumwait, s->mesh_replies_sent); 238 printf("%s.", nm); 239 PR_TIMEVAL("recursion.time.avg", avg); 240 printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median); 241 PR_UL_NM("tcpusage", s->svr.tcp_accept_usage); 242 } 243 244 /** print uptime */ 245 static void print_uptime(struct ub_shm_stat_info* shm_stat) 246 { 247 PR_STATSTIME("time.now", shm_stat->time.now); 248 PR_STATSTIME("time.up", shm_stat->time.up); 249 PR_STATSTIME("time.elapsed", shm_stat->time.elapsed); 250 } 251 252 /** print memory usage */ 253 static void print_mem(struct ub_shm_stat_info* shm_stat, 254 struct ub_stats_info* s) 255 { 256 PR_LL("mem.cache.rrset", shm_stat->mem.rrset); 257 PR_LL("mem.cache.message", shm_stat->mem.msg); 258 PR_LL("mem.mod.iterator", shm_stat->mem.iter); 259 PR_LL("mem.mod.validator", shm_stat->mem.val); 260 PR_LL("mem.mod.respip", shm_stat->mem.respip); 261 #ifdef CLIENT_SUBNET 262 PR_LL("mem.mod.subnet", shm_stat->mem.subnet); 263 #endif 264 #ifdef USE_IPSECMOD 265 PR_LL("mem.mod.ipsecmod", shm_stat->mem.ipsecmod); 266 #endif 267 #ifdef USE_DNSCRYPT 268 PR_LL("mem.cache.dnscrypt_shared_secret", 269 shm_stat->mem.dnscrypt_shared_secret); 270 PR_LL("mem.cache.dnscrypt_nonce", 271 shm_stat->mem.dnscrypt_nonce); 272 #endif 273 PR_LL("mem.streamwait", s->svr.mem_stream_wait); 274 } 275 276 /** print histogram */ 277 static void print_hist(struct ub_stats_info* s) 278 { 279 struct timehist* hist; 280 size_t i; 281 hist = timehist_setup(); 282 if(!hist) 283 fatal_exit("out of memory"); 284 timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST); 285 for(i=0; i<hist->num; i++) { 286 printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n", 287 (int)hist->buckets[i].lower.tv_sec, 288 (int)hist->buckets[i].lower.tv_usec, 289 (int)hist->buckets[i].upper.tv_sec, 290 (int)hist->buckets[i].upper.tv_usec, 291 (unsigned long)hist->buckets[i].count); 292 } 293 timehist_delete(hist); 294 } 295 296 /** print extended */ 297 static void print_extended(struct ub_stats_info* s) 298 { 299 int i; 300 char nm[16]; 301 302 /* TYPE */ 303 for(i=0; i<UB_STATS_QTYPE_NUM; i++) { 304 if(inhibit_zero && s->svr.qtype[i] == 0) 305 continue; 306 sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm)); 307 PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]); 308 } 309 if(!inhibit_zero || s->svr.qtype_big) { 310 PR_UL("num.query.type.other", s->svr.qtype_big); 311 } 312 313 /* CLASS */ 314 for(i=0; i<UB_STATS_QCLASS_NUM; i++) { 315 if(inhibit_zero && s->svr.qclass[i] == 0) 316 continue; 317 sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm)); 318 PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]); 319 } 320 if(!inhibit_zero || s->svr.qclass_big) { 321 PR_UL("num.query.class.other", s->svr.qclass_big); 322 } 323 324 /* OPCODE */ 325 for(i=0; i<UB_STATS_OPCODE_NUM; i++) { 326 if(inhibit_zero && s->svr.qopcode[i] == 0) 327 continue; 328 sldns_wire2str_opcode_buf(i, nm, sizeof(nm)); 329 PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]); 330 } 331 332 /* transport */ 333 PR_UL("num.query.tcp", s->svr.qtcp); 334 PR_UL("num.query.tcpout", s->svr.qtcp_outgoing); 335 PR_UL("num.query.tls", s->svr.qtls); 336 PR_UL("num.query.tls_resume", s->svr.qtls_resume); 337 PR_UL("num.query.ipv6", s->svr.qipv6); 338 339 /* flags */ 340 PR_UL("num.query.flags.QR", s->svr.qbit_QR); 341 PR_UL("num.query.flags.AA", s->svr.qbit_AA); 342 PR_UL("num.query.flags.TC", s->svr.qbit_TC); 343 PR_UL("num.query.flags.RD", s->svr.qbit_RD); 344 PR_UL("num.query.flags.RA", s->svr.qbit_RA); 345 PR_UL("num.query.flags.Z", s->svr.qbit_Z); 346 PR_UL("num.query.flags.AD", s->svr.qbit_AD); 347 PR_UL("num.query.flags.CD", s->svr.qbit_CD); 348 PR_UL("num.query.edns.present", s->svr.qEDNS); 349 PR_UL("num.query.edns.DO", s->svr.qEDNS_DO); 350 351 /* RCODE */ 352 for(i=0; i<UB_STATS_RCODE_NUM; i++) { 353 /* Always include RCODEs 0-5 */ 354 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0) 355 continue; 356 sldns_wire2str_rcode_buf(i, nm, sizeof(nm)); 357 PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]); 358 } 359 if(!inhibit_zero || s->svr.ans_rcode_nodata) { 360 PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata); 361 } 362 /* iteration */ 363 PR_UL("num.query.ratelimited", s->svr.queries_ratelimited); 364 /* validation */ 365 PR_UL("num.answer.secure", s->svr.ans_secure); 366 PR_UL("num.answer.bogus", s->svr.ans_bogus); 367 PR_UL("num.rrset.bogus", s->svr.rrset_bogus); 368 PR_UL("num.query.aggressive.NOERROR", s->svr.num_neg_cache_noerror); 369 PR_UL("num.query.aggressive.NXDOMAIN", s->svr.num_neg_cache_nxdomain); 370 /* threat detection */ 371 PR_UL("unwanted.queries", s->svr.unwanted_queries); 372 PR_UL("unwanted.replies", s->svr.unwanted_replies); 373 /* cache counts */ 374 PR_UL("msg.cache.count", s->svr.msg_cache_count); 375 PR_UL("rrset.cache.count", s->svr.rrset_cache_count); 376 PR_UL("infra.cache.count", s->svr.infra_cache_count); 377 PR_UL("key.cache.count", s->svr.key_cache_count); 378 /* applied RPZ actions */ 379 for(i=0; i<UB_STATS_RPZ_ACTION_NUM; i++) { 380 if(i == RPZ_NO_OVERRIDE_ACTION) 381 continue; 382 if(inhibit_zero && s->svr.rpz_action[i] == 0) 383 continue; 384 PR_UL_SUB("num.rpz.action", rpz_action_to_string(i), s->svr.rpz_action[i]); 385 } 386 #ifdef USE_DNSCRYPT 387 PR_UL("dnscrypt_shared_secret.cache.count", 388 s->svr.shared_secret_cache_count); 389 PR_UL("num.query.dnscrypt.shared_secret.cachemiss", 390 s->svr.num_query_dnscrypt_secret_missed_cache); 391 PR_UL("dnscrypt_nonce.cache.count", s->svr.nonce_cache_count); 392 PR_UL("num.query.dnscrypt.replay", 393 s->svr.num_query_dnscrypt_replay); 394 #endif /* USE_DNSCRYPT */ 395 PR_UL("num.query.authzone.up", s->svr.num_query_authzone_up); 396 PR_UL("num.query.authzone.down", s->svr.num_query_authzone_down); 397 #ifdef CLIENT_SUBNET 398 PR_UL("num.query.subnet", s->svr.num_query_subnet); 399 PR_UL("num.query.subnet_cache", s->svr.num_query_subnet_cache); 400 #endif 401 } 402 403 /** print statistics out of memory structures */ 404 static void do_stats_shm(struct config_file* cfg, struct ub_stats_info* stats, 405 struct ub_shm_stat_info* shm_stat) 406 { 407 int i; 408 char nm[32]; 409 for(i=0; i<cfg->num_threads; i++) { 410 snprintf(nm, sizeof(nm), "thread%d", i); 411 pr_stats(nm, &stats[i+1]); 412 } 413 pr_stats("total", &stats[0]); 414 print_uptime(shm_stat); 415 if(cfg->stat_extended) { 416 print_mem(shm_stat, &stats[0]); 417 print_hist(stats); 418 print_extended(stats); 419 } 420 } 421 #endif /* HAVE_SHMGET */ 422 423 /** print statistics from shm memory segment */ 424 static void print_stats_shm(const char* cfgfile) 425 { 426 #ifdef HAVE_SHMGET 427 struct config_file* cfg; 428 struct ub_stats_info* stats; 429 struct ub_shm_stat_info* shm_stat; 430 int id_ctl, id_arr; 431 /* read config */ 432 if(!(cfg = config_create())) 433 fatal_exit("out of memory"); 434 if(!config_read(cfg, cfgfile, NULL)) 435 fatal_exit("could not read config file"); 436 /* get shm segments */ 437 id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R); 438 if(id_ctl == -1) { 439 fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno)); 440 } 441 id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R); 442 if(id_arr == -1) { 443 fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno)); 444 } 445 shm_stat = (struct ub_shm_stat_info*)shmat(id_ctl, NULL, SHM_RDONLY); 446 if(shm_stat == (void*)-1) { 447 fatal_exit("shmat(%d): %s", id_ctl, strerror(errno)); 448 } 449 stats = (struct ub_stats_info*)shmat(id_arr, NULL, SHM_RDONLY); 450 if(stats == (void*)-1) { 451 fatal_exit("shmat(%d): %s", id_arr, strerror(errno)); 452 } 453 454 /* print the stats */ 455 do_stats_shm(cfg, stats, shm_stat); 456 457 /* shutdown */ 458 shmdt(shm_stat); 459 shmdt(stats); 460 config_delete(cfg); 461 #else 462 (void)cfgfile; 463 #endif /* HAVE_SHMGET */ 464 } 465 466 /** exit with ssl error */ 467 static void ssl_err(const char* s) 468 { 469 fprintf(stderr, "error: %s\n", s); 470 ERR_print_errors_fp(stderr); 471 exit(1); 472 } 473 474 /** exit with ssl error related to a file path */ 475 static void ssl_path_err(const char* s, const char *path) 476 { 477 unsigned long err; 478 err = ERR_peek_error(); 479 if (ERR_GET_LIB(err) == ERR_LIB_SYS && 480 (ERR_GET_FUNC(err) == SYS_F_FOPEN || 481 ERR_GET_FUNC(err) == SYS_F_FREAD) ) { 482 fprintf(stderr, "error: %s\n%s: %s\n", 483 s, path, ERR_reason_error_string(err)); 484 exit(1); 485 } else { 486 ssl_err(s); 487 } 488 } 489 490 /** setup SSL context */ 491 static SSL_CTX* 492 setup_ctx(struct config_file* cfg) 493 { 494 char* s_cert=NULL, *c_key=NULL, *c_cert=NULL; 495 SSL_CTX* ctx; 496 497 if(!(options_remote_is_address(cfg) && cfg->control_use_cert)) 498 return NULL; 499 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1); 500 c_key = fname_after_chroot(cfg->control_key_file, cfg, 1); 501 c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1); 502 if(!s_cert || !c_key || !c_cert) 503 fatal_exit("out of memory"); 504 ctx = SSL_CTX_new(SSLv23_client_method()); 505 if(!ctx) 506 ssl_err("could not allocate SSL_CTX pointer"); 507 #if SSL_OP_NO_SSLv2 != 0 508 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 509 != SSL_OP_NO_SSLv2) 510 ssl_err("could not set SSL_OP_NO_SSLv2"); 511 #endif 512 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 513 != SSL_OP_NO_SSLv3) 514 ssl_err("could not set SSL_OP_NO_SSLv3"); 515 #if defined(SSL_OP_NO_RENEGOTIATION) 516 /* disable client renegotiation */ 517 if((SSL_CTX_set_options(ctx, SSL_OP_NO_RENEGOTIATION) & 518 SSL_OP_NO_RENEGOTIATION) != SSL_OP_NO_RENEGOTIATION) 519 ssl_err("could not set SSL_OP_NO_RENEGOTIATION"); 520 #endif 521 if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert)) 522 ssl_path_err("Error setting up SSL_CTX client cert", c_cert); 523 if (!SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM)) 524 ssl_path_err("Error setting up SSL_CTX client key", c_key); 525 if (!SSL_CTX_check_private_key(ctx)) 526 ssl_err("Error setting up SSL_CTX client key"); 527 if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1) 528 ssl_path_err("Error setting up SSL_CTX verify, server cert", 529 s_cert); 530 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 531 532 free(s_cert); 533 free(c_key); 534 free(c_cert); 535 return ctx; 536 } 537 538 /** contact the server with TCP connect */ 539 static int 540 contact_server(const char* svr, struct config_file* cfg, int statuscmd) 541 { 542 struct sockaddr_storage addr; 543 socklen_t addrlen; 544 int addrfamily = 0, proto = IPPROTO_TCP; 545 int fd, useport = 1; 546 /* use svr or the first config entry */ 547 if(!svr) { 548 if(cfg->control_ifs.first) { 549 svr = cfg->control_ifs.first->str; 550 } else if(cfg->do_ip4) { 551 svr = "127.0.0.1"; 552 } else { 553 svr = "::1"; 554 } 555 /* config 0 addr (everything), means ask localhost */ 556 if(strcmp(svr, "0.0.0.0") == 0) 557 svr = "127.0.0.1"; 558 else if(strcmp(svr, "::0") == 0 || 559 strcmp(svr, "0::0") == 0 || 560 strcmp(svr, "0::") == 0 || 561 strcmp(svr, "::") == 0) 562 svr = "::1"; 563 } 564 if(strchr(svr, '@')) { 565 if(!extstrtoaddr(svr, &addr, &addrlen)) 566 fatal_exit("could not parse IP@port: %s", svr); 567 #ifdef HAVE_SYS_UN_H 568 } else if(svr[0] == '/') { 569 struct sockaddr_un* usock = (struct sockaddr_un *) &addr; 570 usock->sun_family = AF_LOCAL; 571 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 572 usock->sun_len = (unsigned)sizeof(usock); 573 #endif 574 (void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path)); 575 addrlen = (socklen_t)sizeof(struct sockaddr_un); 576 addrfamily = AF_LOCAL; 577 useport = 0; 578 proto = 0; 579 #endif 580 } else { 581 if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen)) 582 fatal_exit("could not parse IP: %s", svr); 583 } 584 585 if(addrfamily == 0) 586 addrfamily = addr_is_ip6(&addr, addrlen)?PF_INET6:PF_INET; 587 fd = socket(addrfamily, SOCK_STREAM, proto); 588 if(fd == -1) { 589 #ifndef USE_WINSOCK 590 fatal_exit("socket: %s", strerror(errno)); 591 #else 592 fatal_exit("socket: %s", wsa_strerror(WSAGetLastError())); 593 #endif 594 } 595 if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) { 596 #ifndef USE_WINSOCK 597 int err = errno; 598 if(!useport) log_err("connect: %s for %s", strerror(err), svr); 599 else log_err_addr("connect", strerror(err), &addr, addrlen); 600 if(err == ECONNREFUSED && statuscmd) { 601 printf("unbound is stopped\n"); 602 exit(3); 603 } 604 #else 605 int wsaerr = WSAGetLastError(); 606 if(!useport) log_err("connect: %s for %s", wsa_strerror(wsaerr), svr); 607 else log_err_addr("connect", wsa_strerror(wsaerr), &addr, addrlen); 608 if(wsaerr == WSAECONNREFUSED && statuscmd) { 609 printf("unbound is stopped\n"); 610 exit(3); 611 } 612 #endif 613 exit(1); 614 } 615 return fd; 616 } 617 618 /** setup SSL on the connection */ 619 static SSL* 620 setup_ssl(SSL_CTX* ctx, int fd) 621 { 622 SSL* ssl; 623 X509* x; 624 int r; 625 626 if(!ctx) return NULL; 627 ssl = SSL_new(ctx); 628 if(!ssl) 629 ssl_err("could not SSL_new"); 630 SSL_set_connect_state(ssl); 631 (void)SSL_set_mode(ssl, (long)SSL_MODE_AUTO_RETRY); 632 if(!SSL_set_fd(ssl, fd)) 633 ssl_err("could not SSL_set_fd"); 634 while(1) { 635 ERR_clear_error(); 636 if( (r=SSL_do_handshake(ssl)) == 1) 637 break; 638 r = SSL_get_error(ssl, r); 639 if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE) 640 ssl_err("SSL handshake failed"); 641 /* wants to be called again */ 642 } 643 644 /* check authenticity of server */ 645 if(SSL_get_verify_result(ssl) != X509_V_OK) 646 ssl_err("SSL verification failed"); 647 x = SSL_get_peer_certificate(ssl); 648 if(!x) 649 ssl_err("Server presented no peer certificate"); 650 X509_free(x); 651 652 return ssl; 653 } 654 655 /** read from ssl or fd, fatalexit on error, 0 EOF, 1 success */ 656 static int 657 remote_read(SSL* ssl, int fd, char* buf, size_t len) 658 { 659 if(ssl) { 660 int r; 661 ERR_clear_error(); 662 if((r = SSL_read(ssl, buf, (int)len-1)) <= 0) { 663 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 664 /* EOF */ 665 return 0; 666 } 667 ssl_err("could not SSL_read"); 668 } 669 buf[r] = 0; 670 } else { 671 ssize_t rr = recv(fd, buf, len-1, 0); 672 if(rr <= 0) { 673 if(rr == 0) { 674 /* EOF */ 675 return 0; 676 } 677 #ifndef USE_WINSOCK 678 fatal_exit("could not recv: %s", strerror(errno)); 679 #else 680 fatal_exit("could not recv: %s", wsa_strerror(WSAGetLastError())); 681 #endif 682 } 683 buf[rr] = 0; 684 } 685 return 1; 686 } 687 688 /** write to ssl or fd, fatalexit on error */ 689 static void 690 remote_write(SSL* ssl, int fd, const char* buf, size_t len) 691 { 692 if(ssl) { 693 if(SSL_write(ssl, buf, (int)len) <= 0) 694 ssl_err("could not SSL_write"); 695 } else { 696 if(send(fd, buf, len, 0) < (ssize_t)len) { 697 #ifndef USE_WINSOCK 698 fatal_exit("could not send: %s", strerror(errno)); 699 #else 700 fatal_exit("could not send: %s", wsa_strerror(WSAGetLastError())); 701 #endif 702 } 703 } 704 } 705 706 /** check args, to see if too many args. Because when a file is sent it 707 * would wait for the terminal, and we can check for too many arguments, 708 * eg. user put arguments on the commandline. */ 709 static void 710 check_args_for_listcmd(int argc, char* argv[]) 711 { 712 if(argc >= 1 && (strcmp(argv[0], "local_zones") == 0 || 713 strcmp(argv[0], "local_zones_remove") == 0 || 714 strcmp(argv[0], "local_datas") == 0 || 715 strcmp(argv[0], "local_datas_remove") == 0) && 716 argc >= 2) { 717 fatal_exit("too many arguments for command '%s', " 718 "content is piped in from stdin", argv[0]); 719 } 720 if(argc >= 1 && (strcmp(argv[0], "view_local_datas") == 0 || 721 strcmp(argv[0], "view_local_datas_remove") == 0) && 722 argc >= 3) { 723 fatal_exit("too many arguments for command '%s', " 724 "content is piped in from stdin", argv[0]); 725 } 726 } 727 728 /** send stdin to server */ 729 static void 730 send_file(SSL* ssl, int fd, FILE* in, char* buf, size_t sz) 731 { 732 while(fgets(buf, (int)sz, in)) { 733 remote_write(ssl, fd, buf, strlen(buf)); 734 } 735 } 736 737 /** send end-of-file marker to server */ 738 static void 739 send_eof(SSL* ssl, int fd) 740 { 741 char e[] = {0x04, 0x0a}; 742 remote_write(ssl, fd, e, sizeof(e)); 743 } 744 745 /** send command and display result */ 746 static int 747 go_cmd(SSL* ssl, int fd, int quiet, int argc, char* argv[]) 748 { 749 char pre[10]; 750 const char* space=" "; 751 const char* newline="\n"; 752 int was_error = 0, first_line = 1; 753 int i; 754 char buf[1024]; 755 snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION); 756 remote_write(ssl, fd, pre, strlen(pre)); 757 for(i=0; i<argc; i++) { 758 remote_write(ssl, fd, space, strlen(space)); 759 remote_write(ssl, fd, argv[i], strlen(argv[i])); 760 } 761 remote_write(ssl, fd, newline, strlen(newline)); 762 763 if(argc == 1 && strcmp(argv[0], "load_cache") == 0) { 764 send_file(ssl, fd, stdin, buf, sizeof(buf)); 765 } 766 else if(argc >= 1 && (strcmp(argv[0], "local_zones") == 0 || 767 strcmp(argv[0], "local_zones_remove") == 0 || 768 strcmp(argv[0], "local_datas") == 0 || 769 strcmp(argv[0], "view_local_datas") == 0 || 770 strcmp(argv[0], "local_datas_remove") == 0 || 771 strcmp(argv[0], "view_local_datas_remove") == 0)) { 772 send_file(ssl, fd, stdin, buf, sizeof(buf)); 773 send_eof(ssl, fd); 774 } 775 776 while(1) { 777 if(remote_read(ssl, fd, buf, sizeof(buf)) == 0) { 778 break; /* EOF */ 779 } 780 if(first_line && strncmp(buf, "error", 5) == 0) { 781 printf("%s", buf); 782 was_error = 1; 783 } else if (!quiet) 784 printf("%s", buf); 785 786 first_line = 0; 787 } 788 return was_error; 789 } 790 791 /** go ahead and read config, contact server and perform command and display */ 792 static int 793 go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[]) 794 { 795 struct config_file* cfg; 796 int fd, ret; 797 SSL_CTX* ctx; 798 SSL* ssl; 799 800 /* read config */ 801 if(!(cfg = config_create())) 802 fatal_exit("out of memory"); 803 if(!config_read(cfg, cfgfile, NULL)) 804 fatal_exit("could not read config file"); 805 if(!cfg->remote_control_enable) 806 log_warn("control-enable is 'no' in the config file."); 807 #ifdef UB_ON_WINDOWS 808 w_config_adjust_directory(cfg); 809 #endif 810 ctx = setup_ctx(cfg); 811 812 /* contact server */ 813 fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0); 814 ssl = setup_ssl(ctx, fd); 815 816 /* send command */ 817 ret = go_cmd(ssl, fd, quiet, argc, argv); 818 819 if(ssl) SSL_free(ssl); 820 #ifndef USE_WINSOCK 821 close(fd); 822 #else 823 closesocket(fd); 824 #endif 825 if(ctx) SSL_CTX_free(ctx); 826 config_delete(cfg); 827 return ret; 828 } 829 830 /** getopt global, in case header files fail to declare it. */ 831 extern int optind; 832 /** getopt global, in case header files fail to declare it. */ 833 extern char* optarg; 834 835 /** Main routine for unbound-control */ 836 int main(int argc, char* argv[]) 837 { 838 int c, ret; 839 int quiet = 0; 840 const char* cfgfile = CONFIGFILE; 841 char* svr = NULL; 842 #ifdef USE_WINSOCK 843 int r; 844 WSADATA wsa_data; 845 #endif 846 #ifdef USE_THREAD_DEBUG 847 /* stop the file output from unbound-control, overwrites the servers */ 848 extern int check_locking_order; 849 check_locking_order = 0; 850 #endif /* USE_THREAD_DEBUG */ 851 log_ident_set("unbound-control"); 852 log_init(NULL, 0, NULL); 853 checklock_start(); 854 #ifdef USE_WINSOCK 855 /* use registry config file in preference to compiletime location */ 856 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 857 cfgfile = CONFIGFILE; 858 #endif 859 /* parse the options */ 860 while( (c=getopt(argc, argv, "c:s:qh")) != -1) { 861 switch(c) { 862 case 'c': 863 cfgfile = optarg; 864 break; 865 case 's': 866 svr = optarg; 867 break; 868 case 'q': 869 quiet = 1; 870 break; 871 case '?': 872 case 'h': 873 default: 874 usage(); 875 } 876 } 877 argc -= optind; 878 argv += optind; 879 if(argc == 0) 880 usage(); 881 if(argc >= 1 && strcmp(argv[0], "start")==0) { 882 if(execlp("unbound", "unbound", "-c", cfgfile, 883 (char*)NULL) < 0) { 884 fatal_exit("could not exec unbound: %s", 885 strerror(errno)); 886 } 887 } 888 if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) { 889 print_stats_shm(cfgfile); 890 return 0; 891 } 892 check_args_for_listcmd(argc, argv); 893 894 #ifdef USE_WINSOCK 895 if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0) 896 fatal_exit("WSAStartup failed: %s", wsa_strerror(r)); 897 #endif 898 899 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS 900 ERR_load_crypto_strings(); 901 #endif 902 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 903 ERR_load_SSL_strings(); 904 #endif 905 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO) 906 # ifndef S_SPLINT_S 907 OpenSSL_add_all_algorithms(); 908 # endif 909 #else 910 OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS 911 | OPENSSL_INIT_ADD_ALL_DIGESTS 912 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 913 #endif 914 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL) 915 (void)SSL_library_init(); 916 #else 917 (void)OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 918 #endif 919 920 if(!RAND_status()) { 921 /* try to seed it */ 922 unsigned char buf[256]; 923 unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid(); 924 unsigned int v = seed; 925 size_t i; 926 for(i=0; i<256/sizeof(v); i++) { 927 memmove(buf+i*sizeof(v), &v, sizeof(v)); 928 v = v*seed + (unsigned int)i; 929 } 930 RAND_seed(buf, 256); 931 log_warn("no entropy, seeding openssl PRNG with time\n"); 932 } 933 934 ret = go(cfgfile, svr, quiet, argc, argv); 935 936 #ifdef USE_WINSOCK 937 WSACleanup(); 938 #endif 939 checklock_stop(); 940 return ret; 941 } 942