contrib/unbound/smallapp/unbound-control.c

   1 /*
   2  * checkconf/unbound-control.c - remote control utility for unbound.
   3  *
   4  * Copyright (c) 2008, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * The remote control utility contacts the unbound server over ssl and
  40  * sends the command, receives the answer, and displays the result
  41  * from the commandline.
  42  */
  43
  44 #include "config.h"
  45 #ifdef HAVE_GETOPT_H
  46 #include <getopt.h>
  47 #endif
  48 #ifdef HAVE_OPENSSL_SSL_H
  49 #include <openssl/ssl.h>
  50 #endif
  51 #ifdef HAVE_OPENSSL_ERR_H
  52 #include <openssl/err.h>
  53 #endif
  54 #ifdef HAVE_OPENSSL_RAND_H
  55 #include <openssl/rand.h>
  56 #endif
  57 #include "util/log.h"
  58 #include "util/config_file.h"
  59 #include "util/locks.h"
  60 #include "util/net_help.h"
  61 #include "util/shm_side/shm_main.h"
  62 #include "daemon/stats.h"
  63 #include "sldns/wire2str.h"
  64 #include "sldns/pkthdr.h"
  65
  66 #ifdef HAVE_SYS_IPC_H
  67 #include "sys/ipc.h"
  68 #endif
  69 #ifdef HAVE_SYS_SHM_H
  70 #include "sys/shm.h"
  71 #endif
  72 #ifdef HAVE_SYS_UN_H
  73 #include <sys/un.h>
  74 #endif
  75
  76 /** Give unbound-control usage, and exit (1). */
  77 static void
  78 usage(void)
  79 {
  80         printf("Usage:  unbound-control [options] command\n");
  81         printf("        Remote control utility for unbound server.\n");
  82         printf("Options:\n");
  83         printf("  -c file       config file, default is %s\n", CONFIGFILE);
  84         printf("  -s ip[@port]  server address, if omitted config is used.\n");
  85         printf("  -q            quiet (don't print anything if it works ok).\n");
  86         printf("  -h            show this usage help.\n");
  87         printf("Commands:\n");
  88         printf("  start                         start server; runs unbound(8)\n");
  89         printf("  stop                          stops the server\n");
  90         printf("  reload                        reloads the server\n");
  91         printf("                                (this flushes data, stats, requestlist)\n");
  92         printf("  stats                         print statistics\n");
  93         printf("  stats_noreset                 peek at statistics\n");
  94 #ifdef HAVE_SHMGET
  95         printf("  stats_shm                     print statistics using shm\n");
  96 #endif
  97         printf("  status                        display status of server\n");
  98         printf("  verbosity <number>            change logging detail\n");
  99         printf("  log_reopen                    close and open the logfile\n");
 100         printf("  local_zone <name> <type>      add new local zone\n");
 101         printf("  local_zone_remove <name>      remove local zone and its contents\n");
 102         printf("  local_data <RR data...>       add local data, for example\n");
 103         printf("                                local_data www.example.com A 192.0.2.1\n");
 104         printf("  local_data_remove <name>      remove local RR data from name\n");
 105         printf("  local_zones, local_zones_remove, local_datas, local_datas_remove\n");
 106         printf("                                same, but read list from stdin\n");
 107         printf("                                (one entry per line).\n");
 108         printf("  dump_cache                    print cache to stdout\n");
 109         printf("  load_cache                    load cache from stdin\n");
 110         printf("  lookup <name>                 print nameservers for name\n");
 111         printf("  flush <name>                  flushes common types for name from cache\n");
 112         printf("                                types:  A, AAAA, MX, PTR, NS,\n");
 113         printf("                                        SOA, CNAME, DNAME, SRV, NAPTR\n");
 114         printf("  flush_type <name> <type>      flush name, type from cache\n");
 115         printf("  flush_zone <name>             flush everything at or under name\n");
 116         printf("                                from rr and dnssec caches\n");
 117         printf("  flush_bogus                   flush all bogus data\n");
 118         printf("  flush_negative                flush all negative data\n");
 119         printf("  flush_stats                   flush statistics, make zero\n");
 120         printf("  flush_requestlist             drop queries that are worked on\n");
 121         printf("  dump_requestlist              show what is worked on by first thread\n");
 122         printf("  flush_infra [all | ip]        remove ping, edns for one IP or all\n");
 123         printf("  dump_infra                    show ping and edns entries\n");
 124         printf("  set_option opt: val           set option to value, no reload\n");
 125         printf("  get_option opt                get option value\n");
 126         printf("  list_stubs                    list stub-zones and root hints in use\n");
 127         printf("  list_forwards                 list forward-zones in use\n");
 128         printf("  list_insecure                 list domain-insecure zones\n");
 129         printf("  list_local_zones              list local-zones in use\n");
 130         printf("  list_local_data               list local-data RRs in use\n");
 131         printf("  insecure_add zone             add domain-insecure zone\n");
 132         printf("  insecure_remove zone          remove domain-insecure zone\n");
 133         printf("  forward_add [+i] zone addr..  add forward-zone with servers\n");
 134         printf("  forward_remove [+i] zone      remove forward zone\n");
 135         printf("  stub_add [+ip] zone addr..    add stub-zone with servers\n");
 136         printf("  stub_remove [+i] zone         remove stub zone\n");
 137         printf("                +i              also do dnssec insecure point\n");
 138         printf("                +p              set stub to use priming\n");
 139         printf("  forward [off | addr ...]      without arg show forward setup\n");
 140         printf("                                or off to turn off root forwarding\n");
 141         printf("                                or give list of ip addresses\n");
 142         printf("  ratelimit_list [+a]           list ratelimited domains\n");
 143         printf("  ip_ratelimit_list [+a]        list ratelimited ip addresses\n");
 144         printf("                +a              list all, also not ratelimited\n");
 145         printf("  view_list_local_zones view    list local-zones in view\n");
 146         printf("  view_list_local_data  view    list local-data RRs in view\n");
 147         printf("  view_local_zone view name type        add local-zone in view\n");
 148         printf("  view_local_zone_remove view name      remove local-zone in view\n");
 149         printf("  view_local_data view RR...            add local-data in view\n");
 150         printf("  view_local_data_remove view name      remove local-data in view\n");
 151         printf("Version %s\n", PACKAGE_VERSION);
 152         printf("BSD licensed, see LICENSE in source package for details.\n");
 153         printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
 154         exit(1);
 155 }
 156
 157 #ifdef HAVE_SHMGET
 158 /** what to put on statistics lines between var and value, ": " or "=" */
 159 #define SQ "="
 160 /** if true, inhibits a lot of =0 lines from the stats output */
 161 static const int inhibit_zero = 1;
 162 /** divide sum of timers to get average */
 163 static void
 164 timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
 165 {
 166 #ifndef S_SPLINT_S
 167         size_t leftover;
 168         if(d == 0) {
 169                 avg->tv_sec = 0;
 170                 avg->tv_usec = 0;
 171                 return;
 172         }
 173         avg->tv_sec = sum->tv_sec / d;
 174         avg->tv_usec = sum->tv_usec / d;
 175         /* handle fraction from seconds divide */
 176         leftover = sum->tv_sec - avg->tv_sec*d;
 177         avg->tv_usec += (leftover*1000000)/d;
 178 #endif
 179 }
 180
 181 /** print unsigned long stats value */
 182 #define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var));
 183 #define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var));
 184 #define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var));
 185 #define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \
 186         (long long)var.tv_sec, (int)var.tv_usec);
 187 #define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var));
 188
 189 /** print stat block */
 190 static void pr_stats(const char* nm, struct stats_info* s)
 191 {
 192         struct timeval avg;
 193         PR_UL_NM("num.queries", s->svr.num_queries);
 194         PR_UL_NM("num.queries_ip_ratelimited",
 195                 s->svr.num_queries_ip_ratelimited);
 196         PR_UL_NM("num.cachehits",
 197                 s->svr.num_queries - s->svr.num_queries_missed_cache);
 198         PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache);
 199         PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch);
 200         PR_UL_NM("num.zero_ttl", s->svr.zero_ttl_responses);
 201         PR_UL_NM("num.recursivereplies", s->mesh_replies_sent);
 202 #ifdef USE_DNSCRYPT
 203     PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted);
 204     PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert);
 205     PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext);
 206     PR_UL_NM("num.dnscrypt.malformed",
 207              s->svr.num_query_dnscrypt_crypted_malformed);
 208 #endif
 209         printf("%s.requestlist.avg"SQ"%g\n", nm,
 210                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 211                         (double)s->svr.sum_query_list_size/
 212                         (s->svr.num_queries_missed_cache+
 213                         s->svr.num_queries_prefetch) : 0.0);
 214         PR_UL_NM("requestlist.max", s->svr.max_query_list_size);
 215         PR_UL_NM("requestlist.overwritten", s->mesh_jostled);
 216         PR_UL_NM("requestlist.exceeded", s->mesh_dropped);
 217         PR_UL_NM("requestlist.current.all", s->mesh_num_states);
 218         PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states);
 219         timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
 220         printf("%s.", nm);
 221         PR_TIMEVAL("recursion.time.avg", avg);
 222         printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median);
 223         PR_UL_NM("tcpusage", s->svr.tcp_accept_usage);
 224 }
 225
 226 /** print uptime */
 227 static void print_uptime(struct shm_stat_info* shm_stat)
 228 {
 229         PR_TIMEVAL("time.now", shm_stat->time.now);
 230         PR_TIMEVAL("time.up", shm_stat->time.up);
 231         PR_TIMEVAL("time.elapsed", shm_stat->time.elapsed);
 232 }
 233
 234 /** print memory usage */
 235 static void print_mem(struct shm_stat_info* shm_stat)
 236 {
 237         PR_LL("mem.cache.rrset", shm_stat->mem.rrset);
 238         PR_LL("mem.cache.message", shm_stat->mem.msg);
 239         PR_LL("mem.cache.iterator", shm_stat->mem.iter);
 240         PR_LL("mem.cache.validator", shm_stat->mem.val);
 241 #ifdef CLIENT_SUBNET
 242         PR_LL("mem.cache.subnet", shm_stat->mem.subnet);
 243 #endif
 244 }
 245
 246 /** print histogram */
 247 static void print_hist(struct stats_info* s)
 248 {
 249         struct timehist* hist;
 250         size_t i;
 251         hist = timehist_setup();
 252         if(!hist)
 253                 fatal_exit("out of memory");
 254         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 255         for(i=0; i<hist->num; i++) {
 256                 printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 257                         (int)hist->buckets[i].lower.tv_sec,
 258                         (int)hist->buckets[i].lower.tv_usec,
 259                         (int)hist->buckets[i].upper.tv_sec,
 260                         (int)hist->buckets[i].upper.tv_usec,
 261                         (unsigned long)hist->buckets[i].count);
 262         }
 263         timehist_delete(hist);
 264 }
 265
 266 /** print extended */
 267 static void print_extended(struct stats_info* s)
 268 {
 269         int i;
 270         char nm[16];
 271
 272         /* TYPE */
 273         for(i=0; i<STATS_QTYPE_NUM; i++) {
 274                 if(inhibit_zero && s->svr.qtype[i] == 0)
 275                         continue;
 276                 sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm));
 277                 PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]);
 278         }
 279         if(!inhibit_zero || s->svr.qtype_big) {
 280                 PR_UL("num.query.type.other", s->svr.qtype_big);
 281         }
 282
 283         /* CLASS */
 284         for(i=0; i<STATS_QCLASS_NUM; i++) {
 285                 if(inhibit_zero && s->svr.qclass[i] == 0)
 286                         continue;
 287                 sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm));
 288                 PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]);
 289         }
 290         if(!inhibit_zero || s->svr.qclass_big) {
 291                 PR_UL("num.query.class.other", s->svr.qclass_big);
 292         }
 293
 294         /* OPCODE */
 295         for(i=0; i<STATS_OPCODE_NUM; i++) {
 296                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 297                         continue;
 298                 sldns_wire2str_opcode_buf(i, nm, sizeof(nm));
 299                 PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]);
 300         }
 301
 302         /* transport */
 303         PR_UL("num.query.tcp", s->svr.qtcp);
 304         PR_UL("num.query.tcpout", s->svr.qtcp_outgoing);
 305         PR_UL("num.query.ipv6", s->svr.qipv6);
 306
 307         /* flags */
 308         PR_UL("num.query.flags.QR", s->svr.qbit_QR);
 309         PR_UL("num.query.flags.AA", s->svr.qbit_AA);
 310         PR_UL("num.query.flags.TC", s->svr.qbit_TC);
 311         PR_UL("num.query.flags.RD", s->svr.qbit_RD);
 312         PR_UL("num.query.flags.RA", s->svr.qbit_RA);
 313         PR_UL("num.query.flags.Z", s->svr.qbit_Z);
 314         PR_UL("num.query.flags.AD", s->svr.qbit_AD);
 315         PR_UL("num.query.flags.CD", s->svr.qbit_CD);
 316         PR_UL("num.query.edns.present", s->svr.qEDNS);
 317         PR_UL("num.query.edns.DO", s->svr.qEDNS_DO);
 318
 319         /* RCODE */
 320         for(i=0; i<STATS_RCODE_NUM; i++) {
 321                 /* Always include RCODEs 0-5 */
 322                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
 323                         continue;
 324                 sldns_wire2str_rcode_buf(i, nm, sizeof(nm));
 325                 PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]);
 326         }
 327         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
 328                 PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata);
 329         }
 330         /* validation */
 331         PR_UL("num.answer.secure", s->svr.ans_secure);
 332         PR_UL("num.answer.bogus", s->svr.ans_bogus);
 333         PR_UL("num.rrset.bogus", s->svr.rrset_bogus);
 334         /* threat detection */
 335         PR_UL("unwanted.queries", s->svr.unwanted_queries);
 336         PR_UL("unwanted.replies", s->svr.unwanted_replies);
 337         /* cache counts */
 338         PR_UL("msg.cache.count", s->svr.msg_cache_count);
 339         PR_UL("rrset.cache.count", s->svr.rrset_cache_count);
 340         PR_UL("infra.cache.count", s->svr.infra_cache_count);
 341         PR_UL("key.cache.count", s->svr.key_cache_count);
 342 }
 343
 344 /** print statistics out of memory structures */
 345 static void do_stats_shm(struct config_file* cfg, struct stats_info* stats,
 346         struct shm_stat_info* shm_stat)
 347 {
 348         int i;
 349         char nm[16];
 350         for(i=0; i<cfg->num_threads; i++) {
 351                 snprintf(nm, sizeof(nm), "thread%d", i);
 352                 pr_stats(nm, &stats[i+1]);
 353         }
 354         pr_stats("total", &stats[0]);
 355         print_uptime(shm_stat);
 356         if(cfg->stat_extended) {
 357                 print_mem(shm_stat);
 358                 print_hist(stats);
 359                 print_extended(stats);
 360         }
 361 }
 362 #endif /* HAVE_SHMGET */
 363
 364 /** print statistics from shm memory segment */
 365 static void print_stats_shm(const char* cfgfile)
 366 {
 367 #ifdef HAVE_SHMGET
 368         struct config_file* cfg;
 369         struct stats_info* stats;
 370         struct shm_stat_info* shm_stat;
 371         int id_ctl, id_arr;
 372         /* read config */
 373         if(!(cfg = config_create()))
 374                 fatal_exit("out of memory");
 375         if(!config_read(cfg, cfgfile, NULL))
 376                 fatal_exit("could not read config file");
 377         /* get shm segments */
 378         id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R|SHM_W);
 379         if(id_ctl == -1) {
 380                 fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno));
 381         }
 382         id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R|SHM_W);
 383         if(id_arr == -1) {
 384                 fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno));
 385         }
 386         shm_stat = (struct shm_stat_info*)shmat(id_ctl, NULL, 0);
 387         if(shm_stat == (void*)-1) {
 388                 fatal_exit("shmat(%d): %s", id_ctl, strerror(errno));
 389         }
 390         stats = (struct stats_info*)shmat(id_arr, NULL, 0);
 391         if(stats == (void*)-1) {
 392                 fatal_exit("shmat(%d): %s", id_arr, strerror(errno));
 393         }
 394
 395         /* print the stats */
 396         do_stats_shm(cfg, stats, shm_stat);
 397
 398         /* shutdown */
 399         shmdt(shm_stat);
 400         shmdt(stats);
 401         config_delete(cfg);
 402 #else
 403         (void)cfgfile;
 404 #endif /* HAVE_SHMGET */
 405 }
 406
 407 /** exit with ssl error */
 408 static void ssl_err(const char* s)
 409 {
 410         fprintf(stderr, "error: %s\n", s);
 411         ERR_print_errors_fp(stderr);
 412         exit(1);
 413 }
 414
 415 /** setup SSL context */
 416 static SSL_CTX*
 417 setup_ctx(struct config_file* cfg)
 418 {
 419         char* s_cert=NULL, *c_key=NULL, *c_cert=NULL;
 420         SSL_CTX* ctx;
 421
 422         if(cfg->remote_control_use_cert) {
 423                 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 424                 c_key = fname_after_chroot(cfg->control_key_file, cfg, 1);
 425                 c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1);
 426                 if(!s_cert || !c_key || !c_cert)
 427                         fatal_exit("out of memory");
 428         }
 429         ctx = SSL_CTX_new(SSLv23_client_method());
 430         if(!ctx)
 431                 ssl_err("could not allocate SSL_CTX pointer");
 432         if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)
 433                 != SSL_OP_NO_SSLv2)
 434                 ssl_err("could not set SSL_OP_NO_SSLv2");
 435         if(cfg->remote_control_use_cert) {
 436                 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3)
 437                         != SSL_OP_NO_SSLv3)
 438                         ssl_err("could not set SSL_OP_NO_SSLv3");
 439                 if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert) ||
 440                     !SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM)
 441                     || !SSL_CTX_check_private_key(ctx))
 442                         ssl_err("Error setting up SSL_CTX client key and cert");
 443                 if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1)
 444                         ssl_err("Error setting up SSL_CTX verify, server cert");
 445                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 446
 447                 free(s_cert);
 448                 free(c_key);
 449                 free(c_cert);
 450         } else {
 451                 /* Use ciphers that don't require authentication  */
 452 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL
 453                 SSL_CTX_set_security_level(ctx, 0);
 454 #endif
 455                 if(!SSL_CTX_set_cipher_list(ctx, "aNULL, eNULL"))
 456                         ssl_err("Error setting NULL cipher!");
 457         }
 458         return ctx;
 459 }
 460
 461 /** contact the server with TCP connect */
 462 static int
 463 contact_server(const char* svr, struct config_file* cfg, int statuscmd)
 464 {
 465         struct sockaddr_storage addr;
 466         socklen_t addrlen;
 467         int addrfamily = 0;
 468         int fd;
 469         /* use svr or the first config entry */
 470         if(!svr) {
 471                 if(cfg->control_ifs) {
 472                         svr = cfg->control_ifs->str;
 473                 } else if(cfg->do_ip4) {
 474                         svr = "127.0.0.1";
 475                 } else {
 476                         svr = "::1";
 477                 }
 478                 /* config 0 addr (everything), means ask localhost */
 479                 if(strcmp(svr, "0.0.0.0") == 0)
 480                         svr = "127.0.0.1";
 481                 else if(strcmp(svr, "::0") == 0 ||
 482                         strcmp(svr, "0::0") == 0 ||
 483                         strcmp(svr, "0::") == 0 ||
 484                         strcmp(svr, "::") == 0)
 485                         svr = "::1";
 486         }
 487         if(strchr(svr, '@')) {
 488                 if(!extstrtoaddr(svr, &addr, &addrlen))
 489                         fatal_exit("could not parse IP@port: %s", svr);
 490 #ifdef HAVE_SYS_UN_H
 491         } else if(svr[0] == '/') {
 492                 struct sockaddr_un* usock = (struct sockaddr_un *) &addr;
 493                 usock->sun_family = AF_LOCAL;
 494 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
 495                 usock->sun_len = (unsigned)sizeof(usock);
 496 #endif
 497                 (void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path));
 498                 addrlen = (socklen_t)sizeof(struct sockaddr_un);
 499                 addrfamily = AF_LOCAL;
 500 #endif
 501         } else {
 502                 if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen))
 503                         fatal_exit("could not parse IP: %s", svr);
 504         }
 505
 506         if(addrfamily == 0)
 507                 addrfamily = addr_is_ip6(&addr, addrlen)?AF_INET6:AF_INET;
 508         fd = socket(addrfamily, SOCK_STREAM, 0);
 509         if(fd == -1) {
 510 #ifndef USE_WINSOCK
 511                 fatal_exit("socket: %s", strerror(errno));
 512 #else
 513                 fatal_exit("socket: %s", wsa_strerror(WSAGetLastError()));
 514 #endif
 515         }
 516         if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) {
 517 #ifndef USE_WINSOCK
 518                 log_err_addr("connect", strerror(errno), &addr, addrlen);
 519                 if(errno == ECONNREFUSED && statuscmd) {
 520                         printf("unbound is stopped\n");
 521                         exit(3);
 522                 }
 523 #else
 524                 log_err_addr("connect", wsa_strerror(WSAGetLastError()), &addr, addrlen);
 525                 if(WSAGetLastError() == WSAECONNREFUSED && statuscmd) {
 526                         printf("unbound is stopped\n");
 527                         exit(3);
 528                 }
 529 #endif
 530                 exit(1);
 531         }
 532         return fd;
 533 }
 534
 535 /** setup SSL on the connection */
 536 static SSL*
 537 setup_ssl(SSL_CTX* ctx, int fd, struct config_file* cfg)
 538 {
 539         SSL* ssl;
 540         X509* x;
 541         int r;
 542
 543         ssl = SSL_new(ctx);
 544         if(!ssl)
 545                 ssl_err("could not SSL_new");
 546         SSL_set_connect_state(ssl);
 547         (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
 548         if(!SSL_set_fd(ssl, fd))
 549                 ssl_err("could not SSL_set_fd");
 550         while(1) {
 551                 ERR_clear_error();
 552                 if( (r=SSL_do_handshake(ssl)) == 1)
 553                         break;
 554                 r = SSL_get_error(ssl, r);
 555                 if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
 556                         ssl_err("SSL handshake failed");
 557                 /* wants to be called again */
 558         }
 559
 560         /* check authenticity of server */
 561         if(SSL_get_verify_result(ssl) != X509_V_OK)
 562                 ssl_err("SSL verification failed");
 563         if(cfg->remote_control_use_cert) {
 564                 x = SSL_get_peer_certificate(ssl);
 565                 if(!x)
 566                         ssl_err("Server presented no peer certificate");
 567                 X509_free(x);
 568         }
 569
 570         return ssl;
 571 }
 572
 573 /** send stdin to server */
 574 static void
 575 send_file(SSL* ssl, FILE* in, char* buf, size_t sz)
 576 {
 577         while(fgets(buf, (int)sz, in)) {
 578                 if(SSL_write(ssl, buf, (int)strlen(buf)) <= 0)
 579                         ssl_err("could not SSL_write contents");
 580         }
 581 }
 582
 583 /** send end-of-file marker to server */
 584 static void
 585 send_eof(SSL* ssl)
 586 {
 587         char e[] = {0x04, 0x0a};
 588         if(SSL_write(ssl, e, (int)sizeof(e)) <= 0)
 589                 ssl_err("could not SSL_write end-of-file marker");
 590 }
 591
 592 /** send command and display result */
 593 static int
 594 go_cmd(SSL* ssl, int quiet, int argc, char* argv[])
 595 {
 596         char pre[10];
 597         const char* space=" ";
 598         const char* newline="\n";
 599         int was_error = 0, first_line = 1;
 600         int r, i;
 601         char buf[1024];
 602         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
 603         if(SSL_write(ssl, pre, (int)strlen(pre)) <= 0)
 604                 ssl_err("could not SSL_write");
 605         for(i=0; i<argc; i++) {
 606                 if(SSL_write(ssl, space, (int)strlen(space)) <= 0)
 607                         ssl_err("could not SSL_write");
 608                 if(SSL_write(ssl, argv[i], (int)strlen(argv[i])) <= 0)
 609                         ssl_err("could not SSL_write");
 610         }
 611         if(SSL_write(ssl, newline, (int)strlen(newline)) <= 0)
 612                 ssl_err("could not SSL_write");
 613
 614         if(argc == 1 && strcmp(argv[0], "load_cache") == 0) {
 615                 send_file(ssl, stdin, buf, sizeof(buf));
 616         }
 617         else if(argc == 1 && (strcmp(argv[0], "local_zones") == 0 ||
 618                 strcmp(argv[0], "local_zones_remove") == 0 ||
 619                 strcmp(argv[0], "local_datas") == 0 ||
 620                 strcmp(argv[0], "local_datas_remove") == 0)) {
 621                 send_file(ssl, stdin, buf, sizeof(buf));
 622                 send_eof(ssl);
 623         }
 624
 625         while(1) {
 626                 ERR_clear_error();
 627                 if((r = SSL_read(ssl, buf, (int)sizeof(buf)-1)) <= 0) {
 628                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 629                                 /* EOF */
 630                                 break;
 631                         }
 632                         ssl_err("could not SSL_read");
 633                 }
 634                 buf[r] = 0;
 635                 if(first_line && strncmp(buf, "error", 5) == 0) {
 636                         printf("%s", buf);
 637                         was_error = 1;
 638                 } else if (!quiet)
 639                         printf("%s", buf);
 640
 641                 first_line = 0;
 642         }
 643         return was_error;
 644 }
 645
 646 /** go ahead and read config, contact server and perform command and display */
 647 static int
 648 go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[])
 649 {
 650         struct config_file* cfg;
 651         int fd, ret;
 652         SSL_CTX* ctx;
 653         SSL* ssl;
 654
 655         /* read config */
 656         if(!(cfg = config_create()))
 657                 fatal_exit("out of memory");
 658         if(!config_read(cfg, cfgfile, NULL))
 659                 fatal_exit("could not read config file");
 660         if(!cfg->remote_control_enable)
 661                 log_warn("control-enable is 'no' in the config file.");
 662 #ifdef UB_ON_WINDOWS
 663         w_config_adjust_directory(cfg);
 664 #endif
 665         ctx = setup_ctx(cfg);
 666
 667         /* contact server */
 668         fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0);
 669         ssl = setup_ssl(ctx, fd, cfg);
 670
 671         /* send command */
 672         ret = go_cmd(ssl, quiet, argc, argv);
 673
 674         SSL_free(ssl);
 675 #ifndef USE_WINSOCK
 676         close(fd);
 677 #else
 678         closesocket(fd);
 679 #endif
 680         SSL_CTX_free(ctx);
 681         config_delete(cfg);
 682         return ret;
 683 }
 684
 685 /** getopt global, in case header files fail to declare it. */
 686 extern int optind;
 687 /** getopt global, in case header files fail to declare it. */
 688 extern char* optarg;
 689
 690 /** Main routine for unbound-control */
 691 int main(int argc, char* argv[])
 692 {
 693         int c, ret;
 694         int quiet = 0;
 695         const char* cfgfile = CONFIGFILE;
 696         char* svr = NULL;
 697 #ifdef USE_WINSOCK
 698         int r;
 699         WSADATA wsa_data;
 700 #endif
 701 #ifdef USE_THREAD_DEBUG
 702         /* stop the file output from unbound-control, overwites the servers */
 703         extern int check_locking_order;
 704         check_locking_order = 0;
 705 #endif /* USE_THREAD_DEBUG */
 706         log_ident_set("unbound-control");
 707         log_init(NULL, 0, NULL);
 708         checklock_start();
 709 #ifdef USE_WINSOCK
 710         /* use registry config file in preference to compiletime location */
 711         if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile")))
 712                 cfgfile = CONFIGFILE;
 713 #endif
 714         /* parse the options */
 715         while( (c=getopt(argc, argv, "c:s:qh")) != -1) {
 716                 switch(c) {
 717                 case 'c':
 718                         cfgfile = optarg;
 719                         break;
 720                 case 's':
 721                         svr = optarg;
 722                         break;
 723                 case 'q':
 724                         quiet = 1;
 725                         break;
 726                 case '?':
 727                 case 'h':
 728                 default:
 729                         usage();
 730                 }
 731         }
 732         argc -= optind;
 733         argv += optind;
 734         if(argc == 0)
 735                 usage();
 736         if(argc >= 1 && strcmp(argv[0], "start")==0) {
 737                 if(execlp("unbound", "unbound", "-c", cfgfile,
 738                         (char*)NULL) < 0) {
 739                         fatal_exit("could not exec unbound: %s",
 740                                 strerror(errno));
 741                 }
 742         }
 743         if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) {
 744                 print_stats_shm(cfgfile);
 745                 return 0;
 746         }
 747
 748 #ifdef USE_WINSOCK
 749         if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0)
 750                 fatal_exit("WSAStartup failed: %s", wsa_strerror(r));
 751 #endif
 752
 753 #ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS
 754         ERR_load_crypto_strings();
 755 #endif
 756         ERR_load_SSL_strings();
 757 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO)
 758         OpenSSL_add_all_algorithms();
 759 #else
 760         OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
 761                 | OPENSSL_INIT_ADD_ALL_DIGESTS
 762                 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 763 #endif
 764 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL)
 765         (void)SSL_library_init();
 766 #else
 767         (void)OPENSSL_init_ssl(0, NULL);
 768 #endif
 769
 770         if(!RAND_status()) {
 771                 /* try to seed it */
 772                 unsigned char buf[256];
 773                 unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid();
 774                 unsigned int v = seed;
 775                 size_t i;
 776                 for(i=0; i<256/sizeof(v); i++) {
 777                         memmove(buf+i*sizeof(v), &v, sizeof(v));
 778                         v = v*seed + (unsigned int)i;
 779                 }
 780                 RAND_seed(buf, 256);
 781                 log_warn("no entropy, seeding openssl PRNG with time\n");
 782         }
 783
 784         ret = go(cfgfile, svr, quiet, argc, argv);
 785
 786 #ifdef USE_WINSOCK
 787         WSACleanup();
 788 #endif
 789         checklock_stop();
 790         return ret;
 791 }