contrib/unbound/daemon/remote.c

   1 /*
   2  * daemon/remote.c - remote control for the unbound daemon.
   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  * This file contains the remote control functionality for the daemon.
  40  * The remote control can be performed using either the commandline
  41  * unbound-control tool, or a TLS capable web browser.
  42  * The channel is secured using TLSv1, and certificates.
  43  * Both the server and the client(control tool) have their own keys.
  44  */
  45 #include "config.h"
  46 #ifdef HAVE_OPENSSL_ERR_H
  47 #include <openssl/err.h>
  48 #endif
  49 #ifdef HAVE_OPENSSL_DH_H
  50 #include <openssl/dh.h>
  51 #endif
  52 #ifdef HAVE_OPENSSL_BN_H
  53 #include <openssl/bn.h>
  54 #endif
  55
  56 #include <ctype.h>
  57 #include "daemon/remote.h"
  58 #include "daemon/worker.h"
  59 #include "daemon/daemon.h"
  60 #include "daemon/stats.h"
  61 #include "daemon/cachedump.h"
  62 #include "util/log.h"
  63 #include "util/config_file.h"
  64 #include "util/net_help.h"
  65 #include "util/module.h"
  66 #include "services/listen_dnsport.h"
  67 #include "services/cache/rrset.h"
  68 #include "services/cache/infra.h"
  69 #include "services/mesh.h"
  70 #include "services/localzone.h"
  71 #include "util/storage/slabhash.h"
  72 #include "util/fptr_wlist.h"
  73 #include "util/data/dname.h"
  74 #include "validator/validator.h"
  75 #include "validator/val_kcache.h"
  76 #include "validator/val_kentry.h"
  77 #include "validator/val_anchor.h"
  78 #include "iterator/iterator.h"
  79 #include "iterator/iter_fwd.h"
  80 #include "iterator/iter_hints.h"
  81 #include "iterator/iter_delegpt.h"
  82 #include "services/outbound_list.h"
  83 #include "services/outside_network.h"
  84 #include "sldns/str2wire.h"
  85 #include "sldns/parseutil.h"
  86 #include "sldns/wire2str.h"
  87 #include "sldns/sbuffer.h"
  88
  89 #ifdef HAVE_SYS_TYPES_H
  90 #  include <sys/types.h>
  91 #endif
  92 #ifdef HAVE_SYS_STAT_H
  93 #include <sys/stat.h>
  94 #endif
  95 #ifdef HAVE_NETDB_H
  96 #include <netdb.h>
  97 #endif
  98
  99 /* just for portability */
 100 #ifdef SQ
 101 #undef SQ
 102 #endif
 103
 104 /** what to put on statistics lines between var and value, ": " or "=" */
 105 #define SQ "="
 106 /** if true, inhibits a lot of =0 lines from the stats output */
 107 static const int inhibit_zero = 1;
 108
 109 /** subtract timers and the values do not overflow or become negative */
 110 static void
 111 timeval_subtract(struct timeval* d, const struct timeval* end,
 112         const struct timeval* start)
 113 {
 114 #ifndef S_SPLINT_S
 115         time_t end_usec = end->tv_usec;
 116         d->tv_sec = end->tv_sec - start->tv_sec;
 117         if(end_usec < start->tv_usec) {
 118                 end_usec += 1000000;
 119                 d->tv_sec--;
 120         }
 121         d->tv_usec = end_usec - start->tv_usec;
 122 #endif
 123 }
 124
 125 /** divide sum of timers to get average */
 126 static void
 127 timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
 128 {
 129 #ifndef S_SPLINT_S
 130         size_t leftover;
 131         if(d == 0) {
 132                 avg->tv_sec = 0;
 133                 avg->tv_usec = 0;
 134                 return;
 135         }
 136         avg->tv_sec = sum->tv_sec / d;
 137         avg->tv_usec = sum->tv_usec / d;
 138         /* handle fraction from seconds divide */
 139         leftover = sum->tv_sec - avg->tv_sec*d;
 140         avg->tv_usec += (leftover*1000000)/d;
 141 #endif
 142 }
 143
 144 /*
 145  * The following function was generated using the openssl utility, using
 146  * the command : "openssl dhparam -C 2048"
 147  * (some openssl versions reject DH that is 'too small', eg. 512).
 148  */
 149 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 150 #ifndef S_SPLINT_S
 151 static DH *get_dh2048(void)
 152 {
 153         static unsigned char dh2048_p[]={
 154                 0xE7,0x36,0x28,0x3B,0xE4,0xC3,0x32,0x1C,0x01,0xC3,0x67,0xD6,
 155                 0xF5,0xF3,0xDA,0xDC,0x71,0xC0,0x42,0x8B,0xE6,0xEB,0x8D,0x80,
 156                 0x35,0x7F,0x09,0x45,0x30,0xE5,0xB2,0x92,0x81,0x3F,0x08,0xCD,
 157                 0x36,0x5E,0x19,0x83,0x62,0xCC,0xAE,0x9B,0x81,0x66,0x24,0xEE,
 158                 0x16,0x6F,0xA9,0x9E,0xF4,0x82,0x1B,0xDD,0x46,0xC7,0x33,0x5D,
 159                 0xF4,0xCA,0xE6,0x8F,0xFC,0xD4,0xD8,0x58,0x94,0x24,0x5D,0xFF,
 160                 0x0A,0xE8,0xEF,0x3D,0xCE,0xBB,0x50,0x94,0xE0,0x5F,0xE8,0x41,
 161                 0xC3,0x35,0x30,0x37,0xD5,0xCB,0x8F,0x3D,0x95,0x15,0x1A,0x77,
 162                 0x42,0xB2,0x06,0x86,0xF6,0x09,0x66,0x0E,0x9A,0x25,0x94,0x3E,
 163                 0xD2,0x04,0x25,0x25,0x1D,0x23,0xEB,0xDC,0x4D,0x0C,0x83,0x28,
 164                 0x2E,0x15,0x81,0x2D,0xC1,0xAF,0x8D,0x36,0x64,0xE3,0x9A,0x83,
 165                 0x78,0xC2,0x8D,0xC0,0x9D,0xD9,0x3A,0x1C,0xC5,0x2B,0x50,0x68,
 166                 0x07,0xA9,0x4B,0x8C,0x07,0x57,0xD6,0x15,0x03,0x4E,0x9E,0x01,
 167                 0xF2,0x6F,0x35,0xAC,0x26,0x9C,0x92,0x68,0x61,0x13,0xFB,0x01,
 168                 0xBA,0x22,0x36,0x01,0x55,0xB6,0x62,0xD9,0xB2,0x98,0xCE,0x5D,
 169                 0x4B,0xA5,0x41,0xD6,0xE5,0x70,0x78,0x12,0x1F,0x64,0xB6,0x6F,
 170                 0xB0,0x91,0x51,0x91,0x92,0xC0,0x94,0x3A,0xD1,0x28,0x4D,0x30,
 171                 0x84,0x3E,0xE4,0xE4,0x7F,0x47,0x89,0xB1,0xB6,0x8C,0x8E,0x0E,
 172                 0x26,0xDB,0xCD,0x17,0x07,0x2A,0x21,0x7A,0xCC,0x68,0xE8,0x57,
 173                 0x94,0x9E,0x59,0x61,0xEC,0x20,0x34,0x26,0x0D,0x66,0x44,0xEB,
 174                 0x6F,0x02,0x58,0xE2,0xED,0xF6,0xF3,0x1B,0xBF,0x9E,0x45,0x52,
 175                 0x5A,0x49,0xA1,0x5B,
 176                 };
 177         static unsigned char dh2048_g[]={
 178                 0x02,
 179                 };
 180         DH *dh = NULL;
 181         BIGNUM *p = NULL, *g = NULL;
 182
 183         dh = DH_new();
 184         p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL);
 185         g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL);
 186         if (!dh || !p || !g)
 187                 goto err;
 188
 189 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 190         dh->p = p;
 191         dh->g = g;
 192 #else
 193         if (!DH_set0_pqg(dh, p, NULL, g))
 194                 goto err;
 195 #endif
 196         return dh;
 197 err:
 198         if (p)
 199                 BN_free(p);
 200         if (g)
 201                 BN_free(g);
 202         if (dh)
 203                 DH_free(dh);
 204         return NULL;
 205 }
 206 #endif /* SPLINT */
 207 #endif /* OPENSSL_VERSION_NUMBER < 0x10100000 */
 208
 209 struct daemon_remote*
 210 daemon_remote_create(struct config_file* cfg)
 211 {
 212         char* s_cert;
 213         char* s_key;
 214         struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 215                 sizeof(*rc));
 216         if(!rc) {
 217                 log_err("out of memory in daemon_remote_create");
 218                 return NULL;
 219         }
 220         rc->max_active = 10;
 221
 222         if(!cfg->remote_control_enable) {
 223                 rc->ctx = NULL;
 224                 return rc;
 225         }
 226         rc->ctx = SSL_CTX_new(SSLv23_server_method());
 227         if(!rc->ctx) {
 228                 log_crypto_err("could not SSL_CTX_new");
 229                 free(rc);
 230                 return NULL;
 231         }
 232         if(!listen_sslctx_setup(rc->ctx)) {
 233                 daemon_remote_delete(rc);
 234                 return NULL;
 235         }
 236
 237         if (cfg->remote_control_use_cert == 0) {
 238                 /* No certificates are requested */
 239 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL
 240                 SSL_CTX_set_security_level(rc->ctx, 0);
 241 #endif
 242                 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL, eNULL")) {
 243                         log_crypto_err("Failed to set aNULL cipher list");
 244                         daemon_remote_delete(rc);
 245                         return NULL;
 246                 }
 247
 248                 /* in openssl 1.1, the securitylevel 0 allows eNULL, that
 249                  * does not need the DH */
 250 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 251                 /* Since we have no certificates and hence no source of
 252                  * DH params, let's generate and set them
 253                  */
 254                 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh2048())) {
 255                         log_crypto_err("Wanted to set DH param, but failed");
 256                         daemon_remote_delete(rc);
 257                         return NULL;
 258                 }
 259 #endif
 260                 return rc;
 261         }
 262         rc->use_cert = 1;
 263         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 264         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 265         if(!s_cert || !s_key) {
 266                 log_err("out of memory in remote control fname");
 267                 goto setup_error;
 268         }
 269         verbose(VERB_ALGO, "setup SSL certificates");
 270         if (!SSL_CTX_use_certificate_chain_file(rc->ctx,s_cert)) {
 271                 log_err("Error for server-cert-file: %s", s_cert);
 272                 log_crypto_err("Error in SSL_CTX use_certificate_chain_file");
 273                 goto setup_error;
 274         }
 275         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 276                 log_err("Error for server-key-file: %s", s_key);
 277                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 278                 goto setup_error;
 279         }
 280         if(!SSL_CTX_check_private_key(rc->ctx)) {
 281                 log_err("Error for server-key-file: %s", s_key);
 282                 log_crypto_err("Error in SSL_CTX check_private_key");
 283                 goto setup_error;
 284         }
 285         listen_sslctx_setup_2(rc->ctx);
 286         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 287                 log_crypto_err("Error setting up SSL_CTX verify locations");
 288         setup_error:
 289                 free(s_cert);
 290                 free(s_key);
 291                 daemon_remote_delete(rc);
 292                 return NULL;
 293         }
 294         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 295         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 296         free(s_cert);
 297         free(s_key);
 298
 299         return rc;
 300 }
 301
 302 void daemon_remote_clear(struct daemon_remote* rc)
 303 {
 304         struct rc_state* p, *np;
 305         if(!rc) return;
 306         /* but do not close the ports */
 307         listen_list_delete(rc->accept_list);
 308         rc->accept_list = NULL;
 309         /* do close these sockets */
 310         p = rc->busy_list;
 311         while(p) {
 312                 np = p->next;
 313                 if(p->ssl)
 314                         SSL_free(p->ssl);
 315                 comm_point_delete(p->c);
 316                 free(p);
 317                 p = np;
 318         }
 319         rc->busy_list = NULL;
 320         rc->active = 0;
 321         rc->worker = NULL;
 322 }
 323
 324 void daemon_remote_delete(struct daemon_remote* rc)
 325 {
 326         if(!rc) return;
 327         daemon_remote_clear(rc);
 328         if(rc->ctx) {
 329                 SSL_CTX_free(rc->ctx);
 330         }
 331         free(rc);
 332 }
 333
 334 /**
 335  * Add and open a new control port
 336  * @param ip: ip str
 337  * @param nr: port nr
 338  * @param list: list head
 339  * @param noproto_is_err: if lack of protocol support is an error.
 340  * @param cfg: config with username for chown of unix-sockets.
 341  * @return false on failure.
 342  */
 343 static int
 344 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
 345         struct config_file* cfg)
 346 {
 347         struct addrinfo hints;
 348         struct addrinfo* res;
 349         struct listen_port* n;
 350         int noproto;
 351         int fd, r;
 352         char port[15];
 353         snprintf(port, sizeof(port), "%d", nr);
 354         port[sizeof(port)-1]=0;
 355         memset(&hints, 0, sizeof(hints));
 356
 357         if(ip[0] == '/') {
 358                 /* This looks like a local socket */
 359                 fd = create_local_accept_sock(ip, &noproto, cfg->use_systemd);
 360                 /*
 361                  * Change socket ownership and permissions so users other
 362                  * than root can access it provided they are in the same
 363                  * group as the user we run as.
 364                  */
 365                 if(fd != -1) {
 366 #ifdef HAVE_CHOWN
 367                         if (cfg->username && cfg->username[0] &&
 368                                 cfg_uid != (uid_t)-1) {
 369                                 if(chown(ip, cfg_uid, cfg_gid) == -1)
 370                                         verbose(VERB_QUERY, "cannot chown %u.%u %s: %s",
 371                                           (unsigned)cfg_uid, (unsigned)cfg_gid,
 372                                           ip, strerror(errno));
 373                         }
 374                         chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
 375 #else
 376                         (void)cfg;
 377 #endif
 378                 }
 379         } else {
 380                 hints.ai_socktype = SOCK_STREAM;
 381                 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 382                 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 383 #ifdef USE_WINSOCK
 384                         if(!noproto_is_err && r == EAI_NONAME) {
 385                                 /* tried to lookup the address as name */
 386                                 return 1; /* return success, but do nothing */
 387                         }
 388 #endif /* USE_WINSOCK */
 389                         log_err("control interface %s:%s getaddrinfo: %s %s",
 390                                 ip?ip:"default", port, gai_strerror(r),
 391 #ifdef EAI_SYSTEM
 392                                 r==EAI_SYSTEM?(char*)strerror(errno):""
 393 #else
 394                                 ""
 395 #endif
 396                         );
 397                         return 0;
 398                 }
 399
 400                 /* open fd */
 401                 fd = create_tcp_accept_sock(res, 1, &noproto, 0,
 402                         cfg->ip_transparent, 0, cfg->ip_freebind, cfg->use_systemd);
 403                 freeaddrinfo(res);
 404         }
 405
 406         if(fd == -1 && noproto) {
 407                 if(!noproto_is_err)
 408                         return 1; /* return success, but do nothing */
 409                 log_err("cannot open control interface %s %d : "
 410                         "protocol not supported", ip, nr);
 411                 return 0;
 412         }
 413         if(fd == -1) {
 414                 log_err("cannot open control interface %s %d", ip, nr);
 415                 return 0;
 416         }
 417
 418         /* alloc */
 419         n = (struct listen_port*)calloc(1, sizeof(*n));
 420         if(!n) {
 421 #ifndef USE_WINSOCK
 422                 close(fd);
 423 #else
 424                 closesocket(fd);
 425 #endif
 426                 log_err("out of memory");
 427                 return 0;
 428         }
 429         n->next = *list;
 430         *list = n;
 431         n->fd = fd;
 432         return 1;
 433 }
 434
 435 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 436 {
 437         struct listen_port* l = NULL;
 438         log_assert(cfg->remote_control_enable && cfg->control_port);
 439         if(cfg->control_ifs) {
 440                 struct config_strlist* p;
 441                 for(p = cfg->control_ifs; p; p = p->next) {
 442                         if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
 443                                 listening_ports_free(l);
 444                                 return NULL;
 445                         }
 446                 }
 447         } else {
 448                 /* defaults */
 449                 if(cfg->do_ip6 &&
 450                         !add_open("::1", cfg->control_port, &l, 0, cfg)) {
 451                         listening_ports_free(l);
 452                         return NULL;
 453                 }
 454                 if(cfg->do_ip4 &&
 455                         !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
 456                         listening_ports_free(l);
 457                         return NULL;
 458                 }
 459         }
 460         return l;
 461 }
 462
 463 /** open accept commpoint */
 464 static int
 465 accept_open(struct daemon_remote* rc, int fd)
 466 {
 467         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 468         if(!n) {
 469                 log_err("out of memory");
 470                 return 0;
 471         }
 472         n->next = rc->accept_list;
 473         rc->accept_list = n;
 474         /* open commpt */
 475         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 476                 &remote_accept_callback, rc);
 477         if(!n->com)
 478                 return 0;
 479         /* keep this port open, its fd is kept in the rc portlist */
 480         n->com->do_not_close = 1;
 481         return 1;
 482 }
 483
 484 int daemon_remote_open_accept(struct daemon_remote* rc,
 485         struct listen_port* ports, struct worker* worker)
 486 {
 487         struct listen_port* p;
 488         rc->worker = worker;
 489         for(p = ports; p; p = p->next) {
 490                 if(!accept_open(rc, p->fd)) {
 491                         log_err("could not create accept comm point");
 492                         return 0;
 493                 }
 494         }
 495         return 1;
 496 }
 497
 498 void daemon_remote_stop_accept(struct daemon_remote* rc)
 499 {
 500         struct listen_list* p;
 501         for(p=rc->accept_list; p; p=p->next) {
 502                 comm_point_stop_listening(p->com);
 503         }
 504 }
 505
 506 void daemon_remote_start_accept(struct daemon_remote* rc)
 507 {
 508         struct listen_list* p;
 509         for(p=rc->accept_list; p; p=p->next) {
 510                 comm_point_start_listening(p->com, -1, -1);
 511         }
 512 }
 513
 514 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 515         struct comm_reply* ATTR_UNUSED(rep))
 516 {
 517         struct daemon_remote* rc = (struct daemon_remote*)arg;
 518         struct sockaddr_storage addr;
 519         socklen_t addrlen;
 520         int newfd;
 521         struct rc_state* n;
 522         if(err != NETEVENT_NOERROR) {
 523                 log_err("error %d on remote_accept_callback", err);
 524                 return 0;
 525         }
 526         /* perform the accept */
 527         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 528         if(newfd == -1)
 529                 return 0;
 530         /* create new commpoint unless we are servicing already */
 531         if(rc->active >= rc->max_active) {
 532                 log_warn("drop incoming remote control: too many connections");
 533         close_exit:
 534 #ifndef USE_WINSOCK
 535                 close(newfd);
 536 #else
 537                 closesocket(newfd);
 538 #endif
 539                 return 0;
 540         }
 541
 542         /* setup commpoint to service the remote control command */
 543         n = (struct rc_state*)calloc(1, sizeof(*n));
 544         if(!n) {
 545                 log_err("out of memory");
 546                 goto close_exit;
 547         }
 548         /* start in reading state */
 549         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 550                 &remote_control_callback, n);
 551         if(!n->c) {
 552                 log_err("out of memory");
 553                 free(n);
 554                 goto close_exit;
 555         }
 556         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 557         n->c->do_not_close = 0;
 558         comm_point_stop_listening(n->c);
 559         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 560         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 561         n->c->repinfo.addrlen = addrlen;
 562         n->shake_state = rc_hs_read;
 563         n->ssl = SSL_new(rc->ctx);
 564         if(!n->ssl) {
 565                 log_crypto_err("could not SSL_new");
 566                 comm_point_delete(n->c);
 567                 free(n);
 568                 goto close_exit;
 569         }
 570         SSL_set_accept_state(n->ssl);
 571         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 572         if(!SSL_set_fd(n->ssl, newfd)) {
 573                 log_crypto_err("could not SSL_set_fd");
 574                 SSL_free(n->ssl);
 575                 comm_point_delete(n->c);
 576                 free(n);
 577                 goto close_exit;
 578         }
 579
 580         n->rc = rc;
 581         n->next = rc->busy_list;
 582         rc->busy_list = n;
 583         rc->active ++;
 584
 585         /* perform the first nonblocking read already, for windows,
 586          * so it can return wouldblock. could be faster too. */
 587         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 588         return 0;
 589 }
 590
 591 /** delete from list */
 592 static void
 593 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 594 {
 595         while(*list) {
 596                 if( (*list)->c == c) {
 597                         *list = (*list)->next;
 598                         return;
 599                 }
 600                 list = &(*list)->next;
 601         }
 602 }
 603
 604 /** decrease active count and remove commpoint from busy list */
 605 static void
 606 clean_point(struct daemon_remote* rc, struct rc_state* s)
 607 {
 608         state_list_remove_elem(&rc->busy_list, s->c);
 609         rc->active --;
 610         if(s->ssl) {
 611                 SSL_shutdown(s->ssl);
 612                 SSL_free(s->ssl);
 613         }
 614         comm_point_delete(s->c);
 615         free(s);
 616 }
 617
 618 int
 619 ssl_print_text(SSL* ssl, const char* text)
 620 {
 621         int r;
 622         if(!ssl)
 623                 return 0;
 624         ERR_clear_error();
 625         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 626                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 627                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 628                                 "closed connection");
 629                         return 0;
 630                 }
 631                 log_crypto_err("could not SSL_write");
 632                 return 0;
 633         }
 634         return 1;
 635 }
 636
 637 /** print text over the ssl connection */
 638 static int
 639 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 640 {
 641         char msg[1024];
 642         vsnprintf(msg, sizeof(msg), format, args);
 643         return ssl_print_text(ssl, msg);
 644 }
 645
 646 /** printf style printing to the ssl connection */
 647 int ssl_printf(SSL* ssl, const char* format, ...)
 648 {
 649         va_list args;
 650         int ret;
 651         va_start(args, format);
 652         ret = ssl_print_vmsg(ssl, format, args);
 653         va_end(args);
 654         return ret;
 655 }
 656
 657 int
 658 ssl_read_line(SSL* ssl, char* buf, size_t max)
 659 {
 660         int r;
 661         size_t len = 0;
 662         if(!ssl)
 663                 return 0;
 664         while(len < max) {
 665                 ERR_clear_error();
 666                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 667                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 668                                 buf[len] = 0;
 669                                 return 1;
 670                         }
 671                         log_crypto_err("could not SSL_read");
 672                         return 0;
 673                 }
 674                 if(buf[len] == '\n') {
 675                         /* return string without \n */
 676                         buf[len] = 0;
 677                         return 1;
 678                 }
 679                 len++;
 680         }
 681         buf[max-1] = 0;
 682         log_err("control line too long (%d): %s", (int)max, buf);
 683         return 0;
 684 }
 685
 686 /** skip whitespace, return new pointer into string */
 687 static char*
 688 skipwhite(char* str)
 689 {
 690         /* EOS \0 is not a space */
 691         while( isspace((unsigned char)*str) )
 692                 str++;
 693         return str;
 694 }
 695
 696 /** send the OK to the control client */
 697 static void send_ok(SSL* ssl)
 698 {
 699         (void)ssl_printf(ssl, "ok\n");
 700 }
 701
 702 /** do the stop command */
 703 static void
 704 do_stop(SSL* ssl, struct daemon_remote* rc)
 705 {
 706         rc->worker->need_to_exit = 1;
 707         comm_base_exit(rc->worker->base);
 708         send_ok(ssl);
 709 }
 710
 711 /** do the reload command */
 712 static void
 713 do_reload(SSL* ssl, struct daemon_remote* rc)
 714 {
 715         rc->worker->need_to_exit = 0;
 716         comm_base_exit(rc->worker->base);
 717         send_ok(ssl);
 718 }
 719
 720 /** do the verbosity command */
 721 static void
 722 do_verbosity(SSL* ssl, char* str)
 723 {
 724         int val = atoi(str);
 725         if(val == 0 && strcmp(str, "0") != 0) {
 726                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 727                 return;
 728         }
 729         verbosity = val;
 730         send_ok(ssl);
 731 }
 732
 733 /** print stats from statinfo */
 734 static int
 735 print_stats(SSL* ssl, const char* nm, struct ub_stats_info* s)
 736 {
 737         struct timeval sumwait, avg;
 738         if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 739                 (unsigned long)s->svr.num_queries)) return 0;
 740         if(!ssl_printf(ssl, "%s.num.queries_ip_ratelimited"SQ"%lu\n", nm,
 741                 (unsigned long)s->svr.num_queries_ip_ratelimited)) return 0;
 742         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
 743                 (unsigned long)(s->svr.num_queries
 744                         - s->svr.num_queries_missed_cache))) return 0;
 745         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 746                 (unsigned long)s->svr.num_queries_missed_cache)) return 0;
 747         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 748                 (unsigned long)s->svr.num_queries_prefetch)) return 0;
 749         if(!ssl_printf(ssl, "%s.num.zero_ttl"SQ"%lu\n", nm,
 750                 (unsigned long)s->svr.zero_ttl_responses)) return 0;
 751         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 752                 (unsigned long)s->mesh_replies_sent)) return 0;
 753 #ifdef USE_DNSCRYPT
 754         if(!ssl_printf(ssl, "%s.num.dnscrypt.crypted"SQ"%lu\n", nm,
 755                 (unsigned long)s->svr.num_query_dnscrypt_crypted)) return 0;
 756         if(!ssl_printf(ssl, "%s.num.dnscrypt.cert"SQ"%lu\n", nm,
 757                 (unsigned long)s->svr.num_query_dnscrypt_cert)) return 0;
 758         if(!ssl_printf(ssl, "%s.num.dnscrypt.cleartext"SQ"%lu\n", nm,
 759                 (unsigned long)s->svr.num_query_dnscrypt_cleartext)) return 0;
 760         if(!ssl_printf(ssl, "%s.num.dnscrypt.malformed"SQ"%lu\n", nm,
 761                 (unsigned long)s->svr.num_query_dnscrypt_crypted_malformed)) return 0;
 762 #endif
 763         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 764                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 765                         (double)s->svr.sum_query_list_size/
 766                         (double)(s->svr.num_queries_missed_cache+
 767                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 768         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm,
 769                 (unsigned long)s->svr.max_query_list_size)) return 0;
 770         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm,
 771                 (unsigned long)s->mesh_jostled)) return 0;
 772         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm,
 773                 (unsigned long)s->mesh_dropped)) return 0;
 774         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm,
 775                 (unsigned long)s->mesh_num_states)) return 0;
 776         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm,
 777                 (unsigned long)s->mesh_num_reply_states)) return 0;
 778 #ifndef S_SPLINT_S
 779         sumwait.tv_sec = s->mesh_replies_sum_wait_sec;
 780         sumwait.tv_usec = s->mesh_replies_sum_wait_usec;
 781 #endif
 782         timeval_divide(&avg, &sumwait, s->mesh_replies_sent);
 783         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 784                 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
 785         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 786                 s->mesh_time_median)) return 0;
 787         if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm,
 788                 (unsigned long)s->svr.tcp_accept_usage)) return 0;
 789         return 1;
 790 }
 791
 792 /** print stats for one thread */
 793 static int
 794 print_thread_stats(SSL* ssl, int i, struct ub_stats_info* s)
 795 {
 796         char nm[32];
 797         snprintf(nm, sizeof(nm), "thread%d", i);
 798         nm[sizeof(nm)-1]=0;
 799         return print_stats(ssl, nm, s);
 800 }
 801
 802 /** print long number */
 803 static int
 804 print_longnum(SSL* ssl, const char* desc, size_t x)
 805 {
 806         if(x > 1024*1024*1024) {
 807                 /* more than a Gb */
 808                 size_t front = x / (size_t)1000000;
 809                 size_t back = x % (size_t)1000000;
 810                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 811                         (unsigned)front, (unsigned)back);
 812         } else {
 813                 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
 814         }
 815 }
 816
 817 /** print mem stats */
 818 static int
 819 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 820 {
 821         size_t msg, rrset, val, iter, respip;
 822 #ifdef CLIENT_SUBNET
 823         size_t subnet = 0;
 824 #endif /* CLIENT_SUBNET */
 825 #ifdef USE_IPSECMOD
 826         size_t ipsecmod = 0;
 827 #endif /* USE_IPSECMOD */
 828 #ifdef USE_DNSCRYPT
 829         size_t dnscrypt_shared_secret = 0;
 830         size_t dnscrypt_nonce = 0;
 831 #endif /* USE_DNSCRYPT */
 832         msg = slabhash_get_mem(daemon->env->msg_cache);
 833         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 834         val = mod_get_mem(&worker->env, "validator");
 835         iter = mod_get_mem(&worker->env, "iterator");
 836         respip = mod_get_mem(&worker->env, "respip");
 837 #ifdef CLIENT_SUBNET
 838         subnet = mod_get_mem(&worker->env, "subnet");
 839 #endif /* CLIENT_SUBNET */
 840 #ifdef USE_IPSECMOD
 841         ipsecmod = mod_get_mem(&worker->env, "ipsecmod");
 842 #endif /* USE_IPSECMOD */
 843 #ifdef USE_DNSCRYPT
 844         if(daemon->dnscenv) {
 845                 dnscrypt_shared_secret = slabhash_get_mem(
 846                         daemon->dnscenv->shared_secrets_cache);
 847                 dnscrypt_nonce = slabhash_get_mem(daemon->dnscenv->nonces_cache);
 848         }
 849 #endif /* USE_DNSCRYPT */
 850
 851         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 852                 return 0;
 853         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 854                 return 0;
 855         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 856                 return 0;
 857         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 858                 return 0;
 859         if(!print_longnum(ssl, "mem.mod.respip"SQ, respip))
 860                 return 0;
 861 #ifdef CLIENT_SUBNET
 862         if(!print_longnum(ssl, "mem.mod.subnet"SQ, subnet))
 863                 return 0;
 864 #endif /* CLIENT_SUBNET */
 865 #ifdef USE_IPSECMOD
 866         if(!print_longnum(ssl, "mem.mod.ipsecmod"SQ, ipsecmod))
 867                 return 0;
 868 #endif /* USE_IPSECMOD */
 869 #ifdef USE_DNSCRYPT
 870         if(!print_longnum(ssl, "mem.cache.dnscrypt_shared_secret"SQ,
 871                         dnscrypt_shared_secret))
 872                 return 0;
 873         if(!print_longnum(ssl, "mem.cache.dnscrypt_nonce"SQ,
 874                         dnscrypt_nonce))
 875                 return 0;
 876 #endif /* USE_DNSCRYPT */
 877         return 1;
 878 }
 879
 880 /** print uptime stats */
 881 static int
 882 print_uptime(SSL* ssl, struct worker* worker, int reset)
 883 {
 884         struct timeval now = *worker->env.now_tv;
 885         struct timeval up, dt;
 886         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 887         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 888         if(reset)
 889                 worker->daemon->time_last_stat = now;
 890         if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 891                 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 892         if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 893                 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 894         if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 895                 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 896         return 1;
 897 }
 898
 899 /** print extended histogram */
 900 static int
 901 print_hist(SSL* ssl, struct ub_stats_info* s)
 902 {
 903         struct timehist* hist;
 904         size_t i;
 905         hist = timehist_setup();
 906         if(!hist) {
 907                 log_err("out of memory");
 908                 return 0;
 909         }
 910         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 911         for(i=0; i<hist->num; i++) {
 912                 if(!ssl_printf(ssl,
 913                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 914                         (int)hist->buckets[i].lower.tv_sec,
 915                         (int)hist->buckets[i].lower.tv_usec,
 916                         (int)hist->buckets[i].upper.tv_sec,
 917                         (int)hist->buckets[i].upper.tv_usec,
 918                         (unsigned long)hist->buckets[i].count)) {
 919                         timehist_delete(hist);
 920                         return 0;
 921                 }
 922         }
 923         timehist_delete(hist);
 924         return 1;
 925 }
 926
 927 /** print extended stats */
 928 static int
 929 print_ext(SSL* ssl, struct ub_stats_info* s)
 930 {
 931         int i;
 932         char nm[16];
 933         const sldns_rr_descriptor* desc;
 934         const sldns_lookup_table* lt;
 935         /* TYPE */
 936         for(i=0; i<UB_STATS_QTYPE_NUM; i++) {
 937                 if(inhibit_zero && s->svr.qtype[i] == 0)
 938                         continue;
 939                 desc = sldns_rr_descript((uint16_t)i);
 940                 if(desc && desc->_name) {
 941                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 942                 } else if (i == LDNS_RR_TYPE_IXFR) {
 943                         snprintf(nm, sizeof(nm), "IXFR");
 944                 } else if (i == LDNS_RR_TYPE_AXFR) {
 945                         snprintf(nm, sizeof(nm), "AXFR");
 946                 } else if (i == LDNS_RR_TYPE_MAILA) {
 947                         snprintf(nm, sizeof(nm), "MAILA");
 948                 } else if (i == LDNS_RR_TYPE_MAILB) {
 949                         snprintf(nm, sizeof(nm), "MAILB");
 950                 } else if (i == LDNS_RR_TYPE_ANY) {
 951                         snprintf(nm, sizeof(nm), "ANY");
 952                 } else {
 953                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 954                 }
 955                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 956                         nm, (unsigned long)s->svr.qtype[i])) return 0;
 957         }
 958         if(!inhibit_zero || s->svr.qtype_big) {
 959                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 960                         (unsigned long)s->svr.qtype_big)) return 0;
 961         }
 962         /* CLASS */
 963         for(i=0; i<UB_STATS_QCLASS_NUM; i++) {
 964                 if(inhibit_zero && s->svr.qclass[i] == 0)
 965                         continue;
 966                 lt = sldns_lookup_by_id(sldns_rr_classes, i);
 967                 if(lt && lt->name) {
 968                         snprintf(nm, sizeof(nm), "%s", lt->name);
 969                 } else {
 970                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 971                 }
 972                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 973                         nm, (unsigned long)s->svr.qclass[i])) return 0;
 974         }
 975         if(!inhibit_zero || s->svr.qclass_big) {
 976                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 977                         (unsigned long)s->svr.qclass_big)) return 0;
 978         }
 979         /* OPCODE */
 980         for(i=0; i<UB_STATS_OPCODE_NUM; i++) {
 981                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 982                         continue;
 983                 lt = sldns_lookup_by_id(sldns_opcodes, i);
 984                 if(lt && lt->name) {
 985                         snprintf(nm, sizeof(nm), "%s", lt->name);
 986                 } else {
 987                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 988                 }
 989                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 990                         nm, (unsigned long)s->svr.qopcode[i])) return 0;
 991         }
 992         /* transport */
 993         if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
 994                 (unsigned long)s->svr.qtcp)) return 0;
 995         if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
 996                 (unsigned long)s->svr.qtcp_outgoing)) return 0;
 997         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
 998                 (unsigned long)s->svr.qipv6)) return 0;
 999         /* flags */
1000         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
1001                 (unsigned long)s->svr.qbit_QR)) return 0;
1002         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
1003                 (unsigned long)s->svr.qbit_AA)) return 0;
1004         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
1005                 (unsigned long)s->svr.qbit_TC)) return 0;
1006         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
1007                 (unsigned long)s->svr.qbit_RD)) return 0;
1008         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
1009                 (unsigned long)s->svr.qbit_RA)) return 0;
1010         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
1011                 (unsigned long)s->svr.qbit_Z)) return 0;
1012         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
1013                 (unsigned long)s->svr.qbit_AD)) return 0;
1014         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
1015                 (unsigned long)s->svr.qbit_CD)) return 0;
1016         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
1017                 (unsigned long)s->svr.qEDNS)) return 0;
1018         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
1019                 (unsigned long)s->svr.qEDNS_DO)) return 0;
1020
1021         /* RCODE */
1022         for(i=0; i<UB_STATS_RCODE_NUM; i++) {
1023                 /* Always include RCODEs 0-5 */
1024                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
1025                         continue;
1026                 lt = sldns_lookup_by_id(sldns_rcodes, i);
1027                 if(lt && lt->name) {
1028                         snprintf(nm, sizeof(nm), "%s", lt->name);
1029                 } else {
1030                         snprintf(nm, sizeof(nm), "RCODE%d", i);
1031                 }
1032                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
1033                         nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
1034         }
1035         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
1036                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
1037                         (unsigned long)s->svr.ans_rcode_nodata)) return 0;
1038         }
1039         /* iteration */
1040         if(!ssl_printf(ssl, "num.query.ratelimited"SQ"%lu\n",
1041                 (unsigned long)s->svr.queries_ratelimited)) return 0;
1042         /* validation */
1043         if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
1044                 (unsigned long)s->svr.ans_secure)) return 0;
1045         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
1046                 (unsigned long)s->svr.ans_bogus)) return 0;
1047         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
1048                 (unsigned long)s->svr.rrset_bogus)) return 0;
1049         /* threat detection */
1050         if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
1051                 (unsigned long)s->svr.unwanted_queries)) return 0;
1052         if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
1053                 (unsigned long)s->svr.unwanted_replies)) return 0;
1054         /* cache counts */
1055         if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
1056                 (unsigned)s->svr.msg_cache_count)) return 0;
1057         if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n",
1058                 (unsigned)s->svr.rrset_cache_count)) return 0;
1059         if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n",
1060                 (unsigned)s->svr.infra_cache_count)) return 0;
1061         if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
1062                 (unsigned)s->svr.key_cache_count)) return 0;
1063 #ifdef USE_DNSCRYPT
1064         if(!ssl_printf(ssl, "dnscrypt_shared_secret.cache.count"SQ"%u\n",
1065                 (unsigned)s->svr.shared_secret_cache_count)) return 0;
1066         if(!ssl_printf(ssl, "dnscrypt_nonce.cache.count"SQ"%u\n",
1067                 (unsigned)s->svr.nonce_cache_count)) return 0;
1068         if(!ssl_printf(ssl, "num.query.dnscrypt.shared_secret.cachemiss"SQ"%lu\n",
1069                 (unsigned long)s->svr.num_query_dnscrypt_secret_missed_cache)) return 0;
1070         if(!ssl_printf(ssl, "num.query.dnscrypt.replay"SQ"%lu\n",
1071                 (unsigned long)s->svr.num_query_dnscrypt_replay)) return 0;
1072 #endif /* USE_DNSCRYPT */
1073         return 1;
1074 }
1075
1076 /** do the stats command */
1077 static void
1078 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
1079 {
1080         struct daemon* daemon = rc->worker->daemon;
1081         struct ub_stats_info total;
1082         struct ub_stats_info s;
1083         int i;
1084         log_assert(daemon->num > 0);
1085         /* gather all thread statistics in one place */
1086         for(i=0; i<daemon->num; i++) {
1087                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
1088                 if(!print_thread_stats(ssl, i, &s))
1089                         return;
1090                 if(i == 0)
1091                         total = s;
1092                 else    server_stats_add(&total, &s);
1093         }
1094         /* print the thread statistics */
1095         total.mesh_time_median /= (double)daemon->num;
1096         if(!print_stats(ssl, "total", &total))
1097                 return;
1098         if(!print_uptime(ssl, rc->worker, reset))
1099                 return;
1100         if(daemon->cfg->stat_extended) {
1101                 if(!print_mem(ssl, rc->worker, daemon))
1102                         return;
1103                 if(!print_hist(ssl, &total))
1104                         return;
1105                 if(!print_ext(ssl, &total))
1106                         return;
1107         }
1108 }
1109
1110 /** parse commandline argument domain name */
1111 static int
1112 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
1113 {
1114         uint8_t nm[LDNS_MAX_DOMAINLEN+1];
1115         size_t nmlen = sizeof(nm);
1116         int status;
1117         *res = NULL;
1118         *len = 0;
1119         *labs = 0;
1120         status = sldns_str2wire_dname_buf(str, nm, &nmlen);
1121         if(status != 0) {
1122                 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str,
1123                         LDNS_WIREPARSE_OFFSET(status),
1124                         sldns_get_errorstr_parse(status));
1125                 return 0;
1126         }
1127         *res = memdup(nm, nmlen);
1128         if(!*res) {
1129                 ssl_printf(ssl, "error out of memory\n");
1130                 return 0;
1131         }
1132         *labs = dname_count_size_labels(*res, len);
1133         return 1;
1134 }
1135
1136 /** find second argument, modifies string */
1137 static int
1138 find_arg2(SSL* ssl, char* arg, char** arg2)
1139 {
1140         char* as = strchr(arg, ' ');
1141         char* at = strchr(arg, '\t');
1142         if(as && at) {
1143                 if(at < as)
1144                         as = at;
1145                 as[0]=0;
1146                 *arg2 = skipwhite(as+1);
1147         } else if(as) {
1148                 as[0]=0;
1149                 *arg2 = skipwhite(as+1);
1150         } else if(at) {
1151                 at[0]=0;
1152                 *arg2 = skipwhite(at+1);
1153         } else {
1154                 ssl_printf(ssl, "error could not find next argument "
1155                         "after %s\n", arg);
1156                 return 0;
1157         }
1158         return 1;
1159 }
1160
1161 /** Add a new zone */
1162 static int
1163 perform_zone_add(SSL* ssl, struct local_zones* zones, char* arg)
1164 {
1165         uint8_t* nm;
1166         int nmlabs;
1167         size_t nmlen;
1168         char* arg2;
1169         enum localzone_type t;
1170         struct local_zone* z;
1171         if(!find_arg2(ssl, arg, &arg2))
1172                 return 0;
1173         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1174                 return 0;
1175         if(!local_zone_str2type(arg2, &t)) {
1176                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
1177                 free(nm);
1178                 return 0;
1179         }
1180         lock_rw_wrlock(&zones->lock);
1181         if((z=local_zones_find(zones, nm, nmlen,
1182                 nmlabs, LDNS_RR_CLASS_IN))) {
1183                 /* already present in tree */
1184                 lock_rw_wrlock(&z->lock);
1185                 z->type = t; /* update type anyway */
1186                 lock_rw_unlock(&z->lock);
1187                 free(nm);
1188                 lock_rw_unlock(&zones->lock);
1189                 return 1;
1190         }
1191         if(!local_zones_add_zone(zones, nm, nmlen,
1192                 nmlabs, LDNS_RR_CLASS_IN, t)) {
1193                 lock_rw_unlock(&zones->lock);
1194                 ssl_printf(ssl, "error out of memory\n");
1195                 return 0;
1196         }
1197         lock_rw_unlock(&zones->lock);
1198         return 1;
1199 }
1200
1201 /** Do the local_zone command */
1202 static void
1203 do_zone_add(SSL* ssl, struct local_zones* zones, char* arg)
1204 {
1205         if(!perform_zone_add(ssl, zones, arg))
1206                 return;
1207         send_ok(ssl);
1208 }
1209
1210 /** Do the local_zones command */
1211 static void
1212 do_zones_add(SSL* ssl, struct local_zones* zones)
1213 {
1214         char buf[2048];
1215         int num = 0;
1216         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1217                 if(buf[0] == 0x04 && buf[1] == 0)
1218                         break; /* end of transmission */
1219                 if(!perform_zone_add(ssl, zones, buf)) {
1220                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1221                                 return;
1222                 }
1223                 else
1224                         num++;
1225         }
1226         (void)ssl_printf(ssl, "added %d zones\n", num);
1227 }
1228
1229 /** Remove a zone */
1230 static int
1231 perform_zone_remove(SSL* ssl, struct local_zones* zones, char* arg)
1232 {
1233         uint8_t* nm;
1234         int nmlabs;
1235         size_t nmlen;
1236         struct local_zone* z;
1237         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1238                 return 0;
1239         lock_rw_wrlock(&zones->lock);
1240         if((z=local_zones_find(zones, nm, nmlen,
1241                 nmlabs, LDNS_RR_CLASS_IN))) {
1242                 /* present in tree */
1243                 local_zones_del_zone(zones, z);
1244         }
1245         lock_rw_unlock(&zones->lock);
1246         free(nm);
1247         return 1;
1248 }
1249
1250 /** Do the local_zone_remove command */
1251 static void
1252 do_zone_remove(SSL* ssl, struct local_zones* zones, char* arg)
1253 {
1254         if(!perform_zone_remove(ssl, zones, arg))
1255                 return;
1256         send_ok(ssl);
1257 }
1258
1259 /** Do the local_zones_remove command */
1260 static void
1261 do_zones_remove(SSL* ssl, struct local_zones* zones)
1262 {
1263         char buf[2048];
1264         int num = 0;
1265         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1266                 if(buf[0] == 0x04 && buf[1] == 0)
1267                         break; /* end of transmission */
1268                 if(!perform_zone_remove(ssl, zones, buf)) {
1269                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1270                                 return;
1271                 }
1272                 else
1273                         num++;
1274         }
1275         (void)ssl_printf(ssl, "removed %d zones\n", num);
1276 }
1277
1278 /** Add new RR data */
1279 static int
1280 perform_data_add(SSL* ssl, struct local_zones* zones, char* arg)
1281 {
1282         if(!local_zones_add_RR(zones, arg)) {
1283                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1284                 return 0;
1285         }
1286         return 1;
1287 }
1288
1289 /** Do the local_data command */
1290 static void
1291 do_data_add(SSL* ssl, struct local_zones* zones, char* arg)
1292 {
1293         if(!perform_data_add(ssl, zones, arg))
1294                 return;
1295         send_ok(ssl);
1296 }
1297
1298 /** Do the local_datas command */
1299 static void
1300 do_datas_add(SSL* ssl, struct local_zones* zones)
1301 {
1302         char buf[2048];
1303         int num = 0;
1304         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1305                 if(buf[0] == 0x04 && buf[1] == 0)
1306                         break; /* end of transmission */
1307                 if(!perform_data_add(ssl, zones, buf)) {
1308                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1309                                 return;
1310                 }
1311                 else
1312                         num++;
1313         }
1314         (void)ssl_printf(ssl, "added %d datas\n", num);
1315 }
1316
1317 /** Remove RR data */
1318 static int
1319 perform_data_remove(SSL* ssl, struct local_zones* zones, char* arg)
1320 {
1321         uint8_t* nm;
1322         int nmlabs;
1323         size_t nmlen;
1324         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1325                 return 0;
1326         local_zones_del_data(zones, nm,
1327                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1328         free(nm);
1329         return 1;
1330 }
1331
1332 /** Do the local_data_remove command */
1333 static void
1334 do_data_remove(SSL* ssl, struct local_zones* zones, char* arg)
1335 {
1336         if(!perform_data_remove(ssl, zones, arg))
1337                 return;
1338         send_ok(ssl);
1339 }
1340
1341 /** Do the local_datas_remove command */
1342 static void
1343 do_datas_remove(SSL* ssl, struct local_zones* zones)
1344 {
1345         char buf[2048];
1346         int num = 0;
1347         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1348                 if(buf[0] == 0x04 && buf[1] == 0)
1349                         break; /* end of transmission */
1350                 if(!perform_data_remove(ssl, zones, buf)) {
1351                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1352                                 return;
1353                 }
1354                 else
1355                         num++;
1356         }
1357         (void)ssl_printf(ssl, "removed %d datas\n", num);
1358 }
1359
1360 /** Add a new zone to view */
1361 static void
1362 do_view_zone_add(SSL* ssl, struct worker* worker, char* arg)
1363 {
1364         char* arg2;
1365         struct view* v;
1366         if(!find_arg2(ssl, arg, &arg2))
1367                 return;
1368         v = views_find_view(worker->daemon->views,
1369                 arg, 1 /* get write lock*/);
1370         if(!v) {
1371                 ssl_printf(ssl,"no view with name: %s\n", arg);
1372                 return;
1373         }
1374         if(!v->local_zones) {
1375                 if(!(v->local_zones = local_zones_create())){
1376                         lock_rw_unlock(&v->lock);
1377                         ssl_printf(ssl,"error out of memory\n");
1378                         return;
1379                 }
1380                 if(!v->isfirst) {
1381                         /* Global local-zone is not used for this view,
1382                          * therefore add defaults to this view-specic
1383                          * local-zone. */
1384                         struct config_file lz_cfg;
1385                         memset(&lz_cfg, 0, sizeof(lz_cfg));
1386                         local_zone_enter_defaults(v->local_zones, &lz_cfg);
1387                 }
1388         }
1389         do_zone_add(ssl, v->local_zones, arg2);
1390         lock_rw_unlock(&v->lock);
1391 }
1392
1393 /** Remove a zone from view */
1394 static void
1395 do_view_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1396 {
1397         char* arg2;
1398         struct view* v;
1399         if(!find_arg2(ssl, arg, &arg2))
1400                 return;
1401         v = views_find_view(worker->daemon->views,
1402                 arg, 1 /* get write lock*/);
1403         if(!v) {
1404                 ssl_printf(ssl,"no view with name: %s\n", arg);
1405                 return;
1406         }
1407         if(!v->local_zones) {
1408                 lock_rw_unlock(&v->lock);
1409                 send_ok(ssl);
1410                 return;
1411         }
1412         do_zone_remove(ssl, v->local_zones, arg2);
1413         lock_rw_unlock(&v->lock);
1414 }
1415
1416 /** Add new RR data to view */
1417 static void
1418 do_view_data_add(SSL* ssl, struct worker* worker, char* arg)
1419 {
1420         char* arg2;
1421         struct view* v;
1422         if(!find_arg2(ssl, arg, &arg2))
1423                 return;
1424         v = views_find_view(worker->daemon->views,
1425                 arg, 1 /* get write lock*/);
1426         if(!v) {
1427                 ssl_printf(ssl,"no view with name: %s\n", arg);
1428                 return;
1429         }
1430         if(!v->local_zones) {
1431                 if(!(v->local_zones = local_zones_create())){
1432                         lock_rw_unlock(&v->lock);
1433                         ssl_printf(ssl,"error out of memory\n");
1434                         return;
1435                 }
1436         }
1437         do_data_add(ssl, v->local_zones, arg2);
1438         lock_rw_unlock(&v->lock);
1439 }
1440
1441 /** Remove RR data from view */
1442 static void
1443 do_view_data_remove(SSL* ssl, struct worker* worker, char* arg)
1444 {
1445         char* arg2;
1446         struct view* v;
1447         if(!find_arg2(ssl, arg, &arg2))
1448                 return;
1449         v = views_find_view(worker->daemon->views,
1450                 arg, 1 /* get write lock*/);
1451         if(!v) {
1452                 ssl_printf(ssl,"no view with name: %s\n", arg);
1453                 return;
1454         }
1455         if(!v->local_zones) {
1456                 lock_rw_unlock(&v->lock);
1457                 send_ok(ssl);
1458                 return;
1459         }
1460         do_data_remove(ssl, v->local_zones, arg2);
1461         lock_rw_unlock(&v->lock);
1462 }
1463
1464 /** cache lookup of nameservers */
1465 static void
1466 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1467 {
1468         uint8_t* nm;
1469         int nmlabs;
1470         size_t nmlen;
1471         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1472                 return;
1473         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1474         free(nm);
1475 }
1476
1477 /** flush something from rrset and msg caches */
1478 static void
1479 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1480         uint16_t t, uint16_t c)
1481 {
1482         hashvalue_type h;
1483         struct query_info k;
1484         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1485         if(t == LDNS_RR_TYPE_SOA)
1486                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1487                         PACKED_RRSET_SOA_NEG);
1488         k.qname = nm;
1489         k.qname_len = nmlen;
1490         k.qtype = t;
1491         k.qclass = c;
1492         k.local_alias = NULL;
1493         h = query_info_hash(&k, 0);
1494         slabhash_remove(worker->env.msg_cache, h, &k);
1495         if(t == LDNS_RR_TYPE_AAAA) {
1496                 /* for AAAA also flush dns64 bit_cd packet */
1497                 h = query_info_hash(&k, BIT_CD);
1498                 slabhash_remove(worker->env.msg_cache, h, &k);
1499         }
1500 }
1501
1502 /** flush a type */
1503 static void
1504 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1505 {
1506         uint8_t* nm;
1507         int nmlabs;
1508         size_t nmlen;
1509         char* arg2;
1510         uint16_t t;
1511         if(!find_arg2(ssl, arg, &arg2))
1512                 return;
1513         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1514                 return;
1515         t = sldns_get_rr_type_by_name(arg2);
1516         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1517
1518         free(nm);
1519         send_ok(ssl);
1520 }
1521
1522 /** flush statistics */
1523 static void
1524 do_flush_stats(SSL* ssl, struct worker* worker)
1525 {
1526         worker_stats_clear(worker);
1527         send_ok(ssl);
1528 }
1529
1530 /**
1531  * Local info for deletion functions
1532  */
1533 struct del_info {
1534         /** worker */
1535         struct worker* worker;
1536         /** name to delete */
1537         uint8_t* name;
1538         /** length */
1539         size_t len;
1540         /** labels */
1541         int labs;
1542         /** time to invalidate to */
1543         time_t expired;
1544         /** number of rrsets removed */
1545         size_t num_rrsets;
1546         /** number of msgs removed */
1547         size_t num_msgs;
1548         /** number of key entries removed */
1549         size_t num_keys;
1550         /** length of addr */
1551         socklen_t addrlen;
1552         /** socket address for host deletion */
1553         struct sockaddr_storage addr;
1554 };
1555
1556 /** callback to delete hosts in infra cache */
1557 static void
1558 infra_del_host(struct lruhash_entry* e, void* arg)
1559 {
1560         /* entry is locked */
1561         struct del_info* inf = (struct del_info*)arg;
1562         struct infra_key* k = (struct infra_key*)e->key;
1563         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1564                 struct infra_data* d = (struct infra_data*)e->data;
1565                 d->probedelay = 0;
1566                 d->timeout_A = 0;
1567                 d->timeout_AAAA = 0;
1568                 d->timeout_other = 0;
1569                 rtt_init(&d->rtt);
1570                 if(d->ttl > inf->expired) {
1571                         d->ttl = inf->expired;
1572                         inf->num_keys++;
1573                 }
1574         }
1575 }
1576
1577 /** flush infra cache */
1578 static void
1579 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1580 {
1581         struct sockaddr_storage addr;
1582         socklen_t len;
1583         struct del_info inf;
1584         if(strcmp(arg, "all") == 0) {
1585                 slabhash_clear(worker->env.infra_cache->hosts);
1586                 send_ok(ssl);
1587                 return;
1588         }
1589         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1590                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1591                 return;
1592         }
1593         /* delete all entries from cache */
1594         /* what we do is to set them all expired */
1595         inf.worker = worker;
1596         inf.name = 0;
1597         inf.len = 0;
1598         inf.labs = 0;
1599         inf.expired = *worker->env.now;
1600         inf.expired -= 3; /* handle 3 seconds skew between threads */
1601         inf.num_rrsets = 0;
1602         inf.num_msgs = 0;
1603         inf.num_keys = 0;
1604         inf.addrlen = len;
1605         memmove(&inf.addr, &addr, len);
1606         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1607                 &inf);
1608         send_ok(ssl);
1609 }
1610
1611 /** flush requestlist */
1612 static void
1613 do_flush_requestlist(SSL* ssl, struct worker* worker)
1614 {
1615         mesh_delete_all(worker->env.mesh);
1616         send_ok(ssl);
1617 }
1618
1619 /** callback to delete rrsets in a zone */
1620 static void
1621 zone_del_rrset(struct lruhash_entry* e, void* arg)
1622 {
1623         /* entry is locked */
1624         struct del_info* inf = (struct del_info*)arg;
1625         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1626         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1627                 struct packed_rrset_data* d =
1628                         (struct packed_rrset_data*)e->data;
1629                 if(d->ttl > inf->expired) {
1630                         d->ttl = inf->expired;
1631                         inf->num_rrsets++;
1632                 }
1633         }
1634 }
1635
1636 /** callback to delete messages in a zone */
1637 static void
1638 zone_del_msg(struct lruhash_entry* e, void* arg)
1639 {
1640         /* entry is locked */
1641         struct del_info* inf = (struct del_info*)arg;
1642         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1643         if(dname_subdomain_c(k->key.qname, inf->name)) {
1644                 struct reply_info* d = (struct reply_info*)e->data;
1645                 if(d->ttl > inf->expired) {
1646                         d->ttl = inf->expired;
1647                         inf->num_msgs++;
1648                 }
1649         }
1650 }
1651
1652 /** callback to delete keys in zone */
1653 static void
1654 zone_del_kcache(struct lruhash_entry* e, void* arg)
1655 {
1656         /* entry is locked */
1657         struct del_info* inf = (struct del_info*)arg;
1658         struct key_entry_key* k = (struct key_entry_key*)e->key;
1659         if(dname_subdomain_c(k->name, inf->name)) {
1660                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1661                 if(d->ttl > inf->expired) {
1662                         d->ttl = inf->expired;
1663                         inf->num_keys++;
1664                 }
1665         }
1666 }
1667
1668 /** remove all rrsets and keys from zone from cache */
1669 static void
1670 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1671 {
1672         uint8_t* nm;
1673         int nmlabs;
1674         size_t nmlen;
1675         struct del_info inf;
1676         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1677                 return;
1678         /* delete all RRs and key entries from zone */
1679         /* what we do is to set them all expired */
1680         inf.worker = worker;
1681         inf.name = nm;
1682         inf.len = nmlen;
1683         inf.labs = nmlabs;
1684         inf.expired = *worker->env.now;
1685         inf.expired -= 3; /* handle 3 seconds skew between threads */
1686         inf.num_rrsets = 0;
1687         inf.num_msgs = 0;
1688         inf.num_keys = 0;
1689         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1690                 &zone_del_rrset, &inf);
1691
1692         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1693
1694         /* and validator cache */
1695         if(worker->env.key_cache) {
1696                 slabhash_traverse(worker->env.key_cache->slab, 1,
1697                         &zone_del_kcache, &inf);
1698         }
1699
1700         free(nm);
1701
1702         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1703                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1704                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1705 }
1706
1707 /** callback to delete bogus rrsets */
1708 static void
1709 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1710 {
1711         /* entry is locked */
1712         struct del_info* inf = (struct del_info*)arg;
1713         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1714         if(d->security == sec_status_bogus) {
1715                 d->ttl = inf->expired;
1716                 inf->num_rrsets++;
1717         }
1718 }
1719
1720 /** callback to delete bogus messages */
1721 static void
1722 bogus_del_msg(struct lruhash_entry* e, void* arg)
1723 {
1724         /* entry is locked */
1725         struct del_info* inf = (struct del_info*)arg;
1726         struct reply_info* d = (struct reply_info*)e->data;
1727         if(d->security == sec_status_bogus) {
1728                 d->ttl = inf->expired;
1729                 inf->num_msgs++;
1730         }
1731 }
1732
1733 /** callback to delete bogus keys */
1734 static void
1735 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1736 {
1737         /* entry is locked */
1738         struct del_info* inf = (struct del_info*)arg;
1739         struct key_entry_data* d = (struct key_entry_data*)e->data;
1740         if(d->isbad) {
1741                 d->ttl = inf->expired;
1742                 inf->num_keys++;
1743         }
1744 }
1745
1746 /** remove all bogus rrsets, msgs and keys from cache */
1747 static void
1748 do_flush_bogus(SSL* ssl, struct worker* worker)
1749 {
1750         struct del_info inf;
1751         /* what we do is to set them all expired */
1752         inf.worker = worker;
1753         inf.expired = *worker->env.now;
1754         inf.expired -= 3; /* handle 3 seconds skew between threads */
1755         inf.num_rrsets = 0;
1756         inf.num_msgs = 0;
1757         inf.num_keys = 0;
1758         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1759                 &bogus_del_rrset, &inf);
1760
1761         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1762
1763         /* and validator cache */
1764         if(worker->env.key_cache) {
1765                 slabhash_traverse(worker->env.key_cache->slab, 1,
1766                         &bogus_del_kcache, &inf);
1767         }
1768
1769         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1770                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1771                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1772 }
1773
1774 /** callback to delete negative and servfail rrsets */
1775 static void
1776 negative_del_rrset(struct lruhash_entry* e, void* arg)
1777 {
1778         /* entry is locked */
1779         struct del_info* inf = (struct del_info*)arg;
1780         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1781         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1782         /* delete the parentside negative cache rrsets,
1783          * these are nameserver rrsets that failed lookup, rdata empty */
1784         if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 &&
1785                 d->rrsig_count == 0 && d->rr_len[0] == 0) {
1786                 d->ttl = inf->expired;
1787                 inf->num_rrsets++;
1788         }
1789 }
1790
1791 /** callback to delete negative and servfail messages */
1792 static void
1793 negative_del_msg(struct lruhash_entry* e, void* arg)
1794 {
1795         /* entry is locked */
1796         struct del_info* inf = (struct del_info*)arg;
1797         struct reply_info* d = (struct reply_info*)e->data;
1798         /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error
1799          * or NOERROR rcode with ANCOUNT==0: a NODATA answer */
1800         if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) {
1801                 d->ttl = inf->expired;
1802                 inf->num_msgs++;
1803         }
1804 }
1805
1806 /** callback to delete negative key entries */
1807 static void
1808 negative_del_kcache(struct lruhash_entry* e, void* arg)
1809 {
1810         /* entry is locked */
1811         struct del_info* inf = (struct del_info*)arg;
1812         struct key_entry_data* d = (struct key_entry_data*)e->data;
1813         /* could be bad because of lookup failure on the DS, DNSKEY, which
1814          * was nxdomain or servfail, and thus a result of negative lookups */
1815         if(d->isbad) {
1816                 d->ttl = inf->expired;
1817                 inf->num_keys++;
1818         }
1819 }
1820
1821 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */
1822 static void
1823 do_flush_negative(SSL* ssl, struct worker* worker)
1824 {
1825         struct del_info inf;
1826         /* what we do is to set them all expired */
1827         inf.worker = worker;
1828         inf.expired = *worker->env.now;
1829         inf.expired -= 3; /* handle 3 seconds skew between threads */
1830         inf.num_rrsets = 0;
1831         inf.num_msgs = 0;
1832         inf.num_keys = 0;
1833         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1834                 &negative_del_rrset, &inf);
1835
1836         slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
1837
1838         /* and validator cache */
1839         if(worker->env.key_cache) {
1840                 slabhash_traverse(worker->env.key_cache->slab, 1,
1841                         &negative_del_kcache, &inf);
1842         }
1843
1844         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1845                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1846                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1847 }
1848
1849 /** remove name rrset from cache */
1850 static void
1851 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1852 {
1853         uint8_t* nm;
1854         int nmlabs;
1855         size_t nmlen;
1856         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1857                 return;
1858         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1859         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1860         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1861         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1862         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1863         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1864         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1865         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1866         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1867         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1868
1869         free(nm);
1870         send_ok(ssl);
1871 }
1872
1873 /** printout a delegation point info */
1874 static int
1875 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1876         struct delegpt* dp)
1877 {
1878         char buf[257];
1879         struct delegpt_ns* ns;
1880         struct delegpt_addr* a;
1881         int f = 0;
1882         if(str) { /* print header for forward, stub */
1883                 char* c = sldns_wire2str_class(dclass);
1884                 dname_str(nm, buf);
1885                 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) {
1886                         free(c);
1887                         return 0;
1888                 }
1889                 free(c);
1890         }
1891         for(ns = dp->nslist; ns; ns = ns->next) {
1892                 dname_str(ns->name, buf);
1893                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1894                         return 0;
1895                 f = 1;
1896         }
1897         for(a = dp->target_list; a; a = a->next_target) {
1898                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1899                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1900                         return 0;
1901                 f = 1;
1902         }
1903         return ssl_printf(ssl, "\n");
1904 }
1905
1906
1907 /** print root forwards */
1908 static int
1909 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1910 {
1911         struct delegpt* dp;
1912         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1913         if(!dp)
1914                 return ssl_printf(ssl, "off (using root hints)\n");
1915         /* if dp is returned it must be the root */
1916         log_assert(query_dname_compare(dp->name, root)==0);
1917         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1918 }
1919
1920 /** parse args into delegpt */
1921 static struct delegpt*
1922 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1923 {
1924         /* parse args and add in */
1925         char* p = args;
1926         char* todo;
1927         struct delegpt* dp = delegpt_create_mlc(nm);
1928         struct sockaddr_storage addr;
1929         socklen_t addrlen;
1930         if(!dp) {
1931                 (void)ssl_printf(ssl, "error out of memory\n");
1932                 return NULL;
1933         }
1934         while(p) {
1935                 todo = p;
1936                 p = strchr(p, ' '); /* find next spot, if any */
1937                 if(p) {
1938                         *p++ = 0;       /* end this spot */
1939                         p = skipwhite(p); /* position at next spot */
1940                 }
1941                 /* parse address */
1942                 if(!extstrtoaddr(todo, &addr, &addrlen)) {
1943                         if(allow_names) {
1944                                 uint8_t* n = NULL;
1945                                 size_t ln;
1946                                 int lb;
1947                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1948                                         (void)ssl_printf(ssl, "error cannot "
1949                                                 "parse IP address or name "
1950                                                 "'%s'\n", todo);
1951                                         delegpt_free_mlc(dp);
1952                                         return NULL;
1953                                 }
1954                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1955                                         (void)ssl_printf(ssl, "error out of memory\n");
1956                                         free(n);
1957                                         delegpt_free_mlc(dp);
1958                                         return NULL;
1959                                 }
1960                                 free(n);
1961
1962                         } else {
1963                                 (void)ssl_printf(ssl, "error cannot parse"
1964                                         " IP address '%s'\n", todo);
1965                                 delegpt_free_mlc(dp);
1966                                 return NULL;
1967                         }
1968                 } else {
1969                         /* add address */
1970                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
1971                                 (void)ssl_printf(ssl, "error out of memory\n");
1972                                 delegpt_free_mlc(dp);
1973                                 return NULL;
1974                         }
1975                 }
1976         }
1977         dp->has_parent_side_NS = 1;
1978         return dp;
1979 }
1980
1981 /** do the status command */
1982 static void
1983 do_forward(SSL* ssl, struct worker* worker, char* args)
1984 {
1985         struct iter_forwards* fwd = worker->env.fwds;
1986         uint8_t* root = (uint8_t*)"\000";
1987         if(!fwd) {
1988                 (void)ssl_printf(ssl, "error: structure not allocated\n");
1989                 return;
1990         }
1991         if(args == NULL || args[0] == 0) {
1992                 (void)print_root_fwds(ssl, fwd, root);
1993                 return;
1994         }
1995         /* set root forwards for this thread. since we are in remote control
1996          * the actual mesh is not running, so we can freely edit it. */
1997         /* delete all the existing queries first */
1998         mesh_delete_all(worker->env.mesh);
1999         if(strcmp(args, "off") == 0) {
2000                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
2001         } else {
2002                 struct delegpt* dp;
2003                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
2004                         return;
2005                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
2006                         (void)ssl_printf(ssl, "error out of memory\n");
2007                         return;
2008                 }
2009         }
2010         send_ok(ssl);
2011 }
2012
2013 static int
2014 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
2015         int* insecure, int* prime)
2016 {
2017         char* zonename;
2018         char* rest;
2019         size_t nmlen;
2020         int nmlabs;
2021         /* parse all -x args */
2022         while(args[0] == '+') {
2023                 if(!find_arg2(ssl, args, &rest))
2024                         return 0;
2025                 while(*(++args) != 0) {
2026                         if(*args == 'i' && insecure)
2027                                 *insecure = 1;
2028                         else if(*args == 'p' && prime)
2029                                 *prime = 1;
2030                         else {
2031                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
2032                                 return 0;
2033                         }
2034                 }
2035                 args = rest;
2036         }
2037         /* parse name */
2038         if(dp) {
2039                 if(!find_arg2(ssl, args, &rest))
2040                         return 0;
2041                 zonename = args;
2042                 args = rest;
2043         } else  zonename = args;
2044         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
2045                 return 0;
2046
2047         /* parse dp */
2048         if(dp) {
2049                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
2050                         free(*nm);
2051                         return 0;
2052                 }
2053         }
2054         return 1;
2055 }
2056
2057 /** do the forward_add command */
2058 static void
2059 do_forward_add(SSL* ssl, struct worker* worker, char* args)
2060 {
2061         struct iter_forwards* fwd = worker->env.fwds;
2062         int insecure = 0;
2063         uint8_t* nm = NULL;
2064         struct delegpt* dp = NULL;
2065         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
2066                 return;
2067         if(insecure && worker->env.anchors) {
2068                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2069                         nm)) {
2070                         (void)ssl_printf(ssl, "error out of memory\n");
2071                         delegpt_free_mlc(dp);
2072                         free(nm);
2073                         return;
2074                 }
2075         }
2076         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
2077                 (void)ssl_printf(ssl, "error out of memory\n");
2078                 free(nm);
2079                 return;
2080         }
2081         free(nm);
2082         send_ok(ssl);
2083 }
2084
2085 /** do the forward_remove command */
2086 static void
2087 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
2088 {
2089         struct iter_forwards* fwd = worker->env.fwds;
2090         int insecure = 0;
2091         uint8_t* nm = NULL;
2092         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
2093                 return;
2094         if(insecure && worker->env.anchors)
2095                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2096                         nm);
2097         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
2098         free(nm);
2099         send_ok(ssl);
2100 }
2101
2102 /** do the stub_add command */
2103 static void
2104 do_stub_add(SSL* ssl, struct worker* worker, char* args)
2105 {
2106         struct iter_forwards* fwd = worker->env.fwds;
2107         int insecure = 0, prime = 0;
2108         uint8_t* nm = NULL;
2109         struct delegpt* dp = NULL;
2110         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
2111                 return;
2112         if(insecure && worker->env.anchors) {
2113                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2114                         nm)) {
2115                         (void)ssl_printf(ssl, "error out of memory\n");
2116                         delegpt_free_mlc(dp);
2117                         free(nm);
2118                         return;
2119                 }
2120         }
2121         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
2122                 if(insecure && worker->env.anchors)
2123                         anchors_delete_insecure(worker->env.anchors,
2124                                 LDNS_RR_CLASS_IN, nm);
2125                 (void)ssl_printf(ssl, "error out of memory\n");
2126                 delegpt_free_mlc(dp);
2127                 free(nm);
2128                 return;
2129         }
2130         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
2131                 (void)ssl_printf(ssl, "error out of memory\n");
2132                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
2133                 if(insecure && worker->env.anchors)
2134                         anchors_delete_insecure(worker->env.anchors,
2135                                 LDNS_RR_CLASS_IN, nm);
2136                 free(nm);
2137                 return;
2138         }
2139         free(nm);
2140         send_ok(ssl);
2141 }
2142
2143 /** do the stub_remove command */
2144 static void
2145 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
2146 {
2147         struct iter_forwards* fwd = worker->env.fwds;
2148         int insecure = 0;
2149         uint8_t* nm = NULL;
2150         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
2151                 return;
2152         if(insecure && worker->env.anchors)
2153                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2154                         nm);
2155         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
2156         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
2157         free(nm);
2158         send_ok(ssl);
2159 }
2160
2161 /** do the insecure_add command */
2162 static void
2163 do_insecure_add(SSL* ssl, struct worker* worker, char* arg)
2164 {
2165         size_t nmlen;
2166         int nmlabs;
2167         uint8_t* nm = NULL;
2168         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
2169                 return;
2170         if(worker->env.anchors) {
2171                 if(!anchors_add_insecure(worker->env.anchors,
2172                         LDNS_RR_CLASS_IN, nm)) {
2173                         (void)ssl_printf(ssl, "error out of memory\n");
2174                         free(nm);
2175                         return;
2176                 }
2177         }
2178         free(nm);
2179         send_ok(ssl);
2180 }
2181
2182 /** do the insecure_remove command */
2183 static void
2184 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg)
2185 {
2186         size_t nmlen;
2187         int nmlabs;
2188         uint8_t* nm = NULL;
2189         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
2190                 return;
2191         if(worker->env.anchors)
2192                 anchors_delete_insecure(worker->env.anchors,
2193                         LDNS_RR_CLASS_IN, nm);
2194         free(nm);
2195         send_ok(ssl);
2196 }
2197
2198 static void
2199 do_insecure_list(SSL* ssl, struct worker* worker)
2200 {
2201         char buf[257];
2202         struct trust_anchor* a;
2203         if(worker->env.anchors) {
2204                 RBTREE_FOR(a, struct trust_anchor*, worker->env.anchors->tree) {
2205                         if(a->numDS == 0 && a->numDNSKEY == 0) {
2206                                 dname_str(a->name, buf);
2207                                 ssl_printf(ssl, "%s\n", buf);
2208                         }
2209                 }
2210         }
2211 }
2212
2213 /** do the status command */
2214 static void
2215 do_status(SSL* ssl, struct worker* worker)
2216 {
2217         int i;
2218         time_t uptime;
2219         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
2220                 return;
2221         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
2222                 return;
2223         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
2224                 return;
2225         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
2226                 return;
2227         for(i=0; i<worker->daemon->mods.num; i++) {
2228                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
2229                         return;
2230         }
2231         if(!ssl_printf(ssl, " ]\n"))
2232                 return;
2233         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
2234         if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
2235                 return;
2236         if(!ssl_printf(ssl, "options:%s%s\n" ,
2237                 (worker->daemon->reuseport?" reuseport":""),
2238                 (worker->daemon->rc->accept_list?" control(ssl)":"")))
2239                 return;
2240         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
2241                 (int)getpid()))
2242                 return;
2243 }
2244
2245 /** get age for the mesh state */
2246 static void
2247 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
2248         struct module_env* env)
2249 {
2250         if(m->reply_list) {
2251                 struct timeval d;
2252                 struct mesh_reply* r = m->reply_list;
2253                 /* last reply is the oldest */
2254                 while(r && r->next)
2255                         r = r->next;
2256                 timeval_subtract(&d, env->now_tv, &r->start_time);
2257                 snprintf(buf, len, ARG_LL "d.%6.6d",
2258                         (long long)d.tv_sec, (int)d.tv_usec);
2259         } else {
2260                 snprintf(buf, len, "-");
2261         }
2262 }
2263
2264 /** get status of a mesh state */
2265 static void
2266 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
2267         char* buf, size_t len)
2268 {
2269         enum module_ext_state s = m->s.ext_state[m->s.curmod];
2270         const char *modname = mesh->mods.mod[m->s.curmod]->name;
2271         size_t l;
2272         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
2273                 m->s.minfo[m->s.curmod]) {
2274                 /* break into iterator to find out who its waiting for */
2275                 struct iter_qstate* qstate = (struct iter_qstate*)
2276                         m->s.minfo[m->s.curmod];
2277                 struct outbound_list* ol = &qstate->outlist;
2278                 struct outbound_entry* e;
2279                 snprintf(buf, len, "%s wait for", modname);
2280                 l = strlen(buf);
2281                 buf += l; len -= l;
2282                 if(ol->first == NULL)
2283                         snprintf(buf, len, " (empty_list)");
2284                 for(e = ol->first; e; e = e->next) {
2285                         snprintf(buf, len, " ");
2286                         l = strlen(buf);
2287                         buf += l; len -= l;
2288                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
2289                                 buf, len);
2290                         l = strlen(buf);
2291                         buf += l; len -= l;
2292                 }
2293         } else if(s == module_wait_subquery) {
2294                 /* look in subs from mesh state to see what */
2295                 char nm[257];
2296                 struct mesh_state_ref* sub;
2297                 snprintf(buf, len, "%s wants", modname);
2298                 l = strlen(buf);
2299                 buf += l; len -= l;
2300                 if(m->sub_set.count == 0)
2301                         snprintf(buf, len, " (empty_list)");
2302                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
2303                         char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype);
2304                         char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
2305                         dname_str(sub->s->s.qinfo.qname, nm);
2306                         snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"),
2307                                 (c?c:"CLASS??"), nm);
2308                         l = strlen(buf);
2309                         buf += l; len -= l;
2310                         free(t);
2311                         free(c);
2312                 }
2313         } else {
2314                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
2315         }
2316 }
2317
2318 /** do the dump_requestlist command */
2319 static void
2320 do_dump_requestlist(SSL* ssl, struct worker* worker)
2321 {
2322         struct mesh_area* mesh;
2323         struct mesh_state* m;
2324         int num = 0;
2325         char buf[257];
2326         char timebuf[32];
2327         char statbuf[10240];
2328         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
2329                 return;
2330         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
2331                 return;
2332         /* show worker mesh contents */
2333         mesh = worker->env.mesh;
2334         if(!mesh) return;
2335         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
2336                 char* t = sldns_wire2str_type(m->s.qinfo.qtype);
2337                 char* c = sldns_wire2str_class(m->s.qinfo.qclass);
2338                 dname_str(m->s.qinfo.qname, buf);
2339                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
2340                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
2341                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
2342                         num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
2343                         statbuf)) {
2344                         free(t);
2345                         free(c);
2346                         return;
2347                 }
2348                 num++;
2349                 free(t);
2350                 free(c);
2351         }
2352 }
2353
2354 /** structure for argument data for dump infra host */
2355 struct infra_arg {
2356         /** the infra cache */
2357         struct infra_cache* infra;
2358         /** the SSL connection */
2359         SSL* ssl;
2360         /** the time now */
2361         time_t now;
2362         /** ssl failure? stop writing and skip the rest.  If the tcp
2363          * connection is broken, and writes fail, we then stop writing. */
2364         int ssl_failed;
2365 };
2366
2367 /** callback for every host element in the infra cache */
2368 static void
2369 dump_infra_host(struct lruhash_entry* e, void* arg)
2370 {
2371         struct infra_arg* a = (struct infra_arg*)arg;
2372         struct infra_key* k = (struct infra_key*)e->key;
2373         struct infra_data* d = (struct infra_data*)e->data;
2374         char ip_str[1024];
2375         char name[257];
2376         int port;
2377         if(a->ssl_failed)
2378                 return;
2379         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
2380         dname_str(k->zonename, name);
2381         port = (int)ntohs(((struct sockaddr_in*)&k->addr)->sin_port);
2382         if(port != UNBOUND_DNS_PORT) {
2383                 snprintf(ip_str+strlen(ip_str), sizeof(ip_str)-strlen(ip_str),
2384                         "@%d", port);
2385         }
2386         /* skip expired stuff (only backed off) */
2387         if(d->ttl < a->now) {
2388                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
2389                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
2390                                 name, d->rtt.rto))  {
2391                                 a->ssl_failed = 1;
2392                                 return;
2393                         }
2394                 }
2395                 return;
2396         }
2397         if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d "
2398                 "tA %d tAAAA %d tother %d "
2399                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
2400                 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now),
2401                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
2402                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
2403                 (int)d->edns_lame_known, (int)d->edns_version,
2404                 (int)(a->now<d->probedelay?(d->probedelay - a->now):0),
2405                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
2406                 (int)d->lame_other)) {
2407                 a->ssl_failed = 1;
2408                 return;
2409         }
2410 }
2411
2412 /** do the dump_infra command */
2413 static void
2414 do_dump_infra(SSL* ssl, struct worker* worker)
2415 {
2416         struct infra_arg arg;
2417         arg.infra = worker->env.infra_cache;
2418         arg.ssl = ssl;
2419         arg.now = *worker->env.now;
2420         arg.ssl_failed = 0;
2421         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
2422 }
2423
2424 /** do the log_reopen command */
2425 static void
2426 do_log_reopen(SSL* ssl, struct worker* worker)
2427 {
2428         struct config_file* cfg = worker->env.cfg;
2429         send_ok(ssl);
2430         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
2431 }
2432
2433 /** do the set_option command */
2434 static void
2435 do_set_option(SSL* ssl, struct worker* worker, char* arg)
2436 {
2437         char* arg2;
2438         if(!find_arg2(ssl, arg, &arg2))
2439                 return;
2440         if(!config_set_option(worker->env.cfg, arg, arg2)) {
2441                 (void)ssl_printf(ssl, "error setting option\n");
2442                 return;
2443         }
2444         /* effectuate some arguments */
2445         if(strcmp(arg, "val-override-date:") == 0) {
2446                 int m = modstack_find(&worker->env.mesh->mods, "validator");
2447                 struct val_env* val_env = NULL;
2448                 if(m != -1) val_env = (struct val_env*)worker->env.modinfo[m];
2449                 if(val_env)
2450                         val_env->date_override = worker->env.cfg->val_date_override;
2451         }
2452         send_ok(ssl);
2453 }
2454
2455 /* routine to printout option values over SSL */
2456 void remote_get_opt_ssl(char* line, void* arg)
2457 {
2458         SSL* ssl = (SSL*)arg;
2459         (void)ssl_printf(ssl, "%s\n", line);
2460 }
2461
2462 /** do the get_option command */
2463 static void
2464 do_get_option(SSL* ssl, struct worker* worker, char* arg)
2465 {
2466         int r;
2467         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
2468         if(!r) {
2469                 (void)ssl_printf(ssl, "error unknown option\n");
2470                 return;
2471         }
2472 }
2473
2474 /** do the list_forwards command */
2475 static void
2476 do_list_forwards(SSL* ssl, struct worker* worker)
2477 {
2478         /* since its a per-worker structure no locks needed */
2479         struct iter_forwards* fwds = worker->env.fwds;
2480         struct iter_forward_zone* z;
2481         struct trust_anchor* a;
2482         int insecure;
2483         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
2484                 if(!z->dp) continue; /* skip empty marker for stub */
2485
2486                 /* see if it is insecure */
2487                 insecure = 0;
2488                 if(worker->env.anchors &&
2489                         (a=anchor_find(worker->env.anchors, z->name,
2490                         z->namelabs, z->namelen,  z->dclass))) {
2491                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2492                                 insecure = 1;
2493                         lock_basic_unlock(&a->lock);
2494                 }
2495
2496                 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
2497                         z->name, z->dclass, z->dp))
2498                         return;
2499         }
2500 }
2501
2502 /** do the list_stubs command */
2503 static void
2504 do_list_stubs(SSL* ssl, struct worker* worker)
2505 {
2506         struct iter_hints_stub* z;
2507         struct trust_anchor* a;
2508         int insecure;
2509         char str[32];
2510         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
2511
2512                 /* see if it is insecure */
2513                 insecure = 0;
2514                 if(worker->env.anchors &&
2515                         (a=anchor_find(worker->env.anchors, z->node.name,
2516                         z->node.labs, z->node.len,  z->node.dclass))) {
2517                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2518                                 insecure = 1;
2519                         lock_basic_unlock(&a->lock);
2520                 }
2521
2522                 snprintf(str, sizeof(str), "stub %sprime%s",
2523                         (z->noprime?"no":""), (insecure?" +i":""));
2524                 if(!ssl_print_name_dp(ssl, str, z->node.name,
2525                         z->node.dclass, z->dp))
2526                         return;
2527         }
2528 }
2529
2530 /** do the list_local_zones command */
2531 static void
2532 do_list_local_zones(SSL* ssl, struct local_zones* zones)
2533 {
2534         struct local_zone* z;
2535         char buf[257];
2536         lock_rw_rdlock(&zones->lock);
2537         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2538                 lock_rw_rdlock(&z->lock);
2539                 dname_str(z->name, buf);
2540                 if(!ssl_printf(ssl, "%s %s\n", buf,
2541                         local_zone_type2str(z->type))) {
2542                         /* failure to print */
2543                         lock_rw_unlock(&z->lock);
2544                         lock_rw_unlock(&zones->lock);
2545                         return;
2546                 }
2547                 lock_rw_unlock(&z->lock);
2548         }
2549         lock_rw_unlock(&zones->lock);
2550 }
2551
2552 /** do the list_local_data command */
2553 static void
2554 do_list_local_data(SSL* ssl, struct worker* worker, struct local_zones* zones)
2555 {
2556         struct local_zone* z;
2557         struct local_data* d;
2558         struct local_rrset* p;
2559         char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer);
2560         size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer);
2561         lock_rw_rdlock(&zones->lock);
2562         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2563                 lock_rw_rdlock(&z->lock);
2564                 RBTREE_FOR(d, struct local_data*, &z->data) {
2565                         for(p = d->rrsets; p; p = p->next) {
2566                                 struct packed_rrset_data* d =
2567                                         (struct packed_rrset_data*)p->rrset->entry.data;
2568                                 size_t i;
2569                                 for(i=0; i<d->count + d->rrsig_count; i++) {
2570                                         if(!packed_rr_to_string(p->rrset, i,
2571                                                 0, s, slen)) {
2572                                                 if(!ssl_printf(ssl, "BADRR\n")) {
2573                                                         lock_rw_unlock(&z->lock);
2574                                                         lock_rw_unlock(&zones->lock);
2575                                                         return;
2576                                                 }
2577                                         }
2578                                         if(!ssl_printf(ssl, "%s\n", s)) {
2579                                                 lock_rw_unlock(&z->lock);
2580                                                 lock_rw_unlock(&zones->lock);
2581                                                 return;
2582                                         }
2583                                 }
2584                         }
2585                 }
2586                 lock_rw_unlock(&z->lock);
2587         }
2588         lock_rw_unlock(&zones->lock);
2589 }
2590
2591 /** do the view_list_local_zones command */
2592 static void
2593 do_view_list_local_zones(SSL* ssl, struct worker* worker, char* arg)
2594 {
2595         struct view* v = views_find_view(worker->daemon->views,
2596                 arg, 0 /* get read lock*/);
2597         if(!v) {
2598                 ssl_printf(ssl,"no view with name: %s\n", arg);
2599                 return;
2600         }
2601         if(v->local_zones) {
2602                 do_list_local_zones(ssl, v->local_zones);
2603         }
2604         lock_rw_unlock(&v->lock);
2605 }
2606
2607 /** do the view_list_local_data command */
2608 static void
2609 do_view_list_local_data(SSL* ssl, struct worker* worker, char* arg)
2610 {
2611         struct view* v = views_find_view(worker->daemon->views,
2612                 arg, 0 /* get read lock*/);
2613         if(!v) {
2614                 ssl_printf(ssl,"no view with name: %s\n", arg);
2615                 return;
2616         }
2617         if(v->local_zones) {
2618                 do_list_local_data(ssl, worker, v->local_zones);
2619         }
2620         lock_rw_unlock(&v->lock);
2621 }
2622
2623 /** struct for user arg ratelimit list */
2624 struct ratelimit_list_arg {
2625         /** the infra cache */
2626         struct infra_cache* infra;
2627         /** the SSL to print to */
2628         SSL* ssl;
2629         /** all or only ratelimited */
2630         int all;
2631         /** current time */
2632         time_t now;
2633 };
2634
2635 #define ip_ratelimit_list_arg ratelimit_list_arg
2636
2637 /** list items in the ratelimit table */
2638 static void
2639 rate_list(struct lruhash_entry* e, void* arg)
2640 {
2641         struct ratelimit_list_arg* a = (struct ratelimit_list_arg*)arg;
2642         struct rate_key* k = (struct rate_key*)e->key;
2643         struct rate_data* d = (struct rate_data*)e->data;
2644         char buf[257];
2645         int lim = infra_find_ratelimit(a->infra, k->name, k->namelen);
2646         int max = infra_rate_max(d, a->now);
2647         if(a->all == 0) {
2648                 if(max < lim)
2649                         return;
2650         }
2651         dname_str(k->name, buf);
2652         ssl_printf(a->ssl, "%s %d limit %d\n", buf, max, lim);
2653 }
2654
2655 /** list items in the ip_ratelimit table */
2656 static void
2657 ip_rate_list(struct lruhash_entry* e, void* arg)
2658 {
2659         char ip[128];
2660         struct ip_ratelimit_list_arg* a = (struct ip_ratelimit_list_arg*)arg;
2661         struct ip_rate_key* k = (struct ip_rate_key*)e->key;
2662         struct ip_rate_data* d = (struct ip_rate_data*)e->data;
2663         int lim = infra_ip_ratelimit;
2664         int max = infra_rate_max(d, a->now);
2665         if(a->all == 0) {
2666                 if(max < lim)
2667                         return;
2668         }
2669         addr_to_str(&k->addr, k->addrlen, ip, sizeof(ip));
2670         ssl_printf(a->ssl, "%s %d limit %d\n", ip, max, lim);
2671 }
2672
2673 /** do the ratelimit_list command */
2674 static void
2675 do_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2676 {
2677         struct ratelimit_list_arg a;
2678         a.all = 0;
2679         a.infra = worker->env.infra_cache;
2680         a.now = *worker->env.now;
2681         a.ssl = ssl;
2682         arg = skipwhite(arg);
2683         if(strcmp(arg, "+a") == 0)
2684                 a.all = 1;
2685         if(a.infra->domain_rates==NULL ||
2686                 (a.all == 0 && infra_dp_ratelimit == 0))
2687                 return;
2688         slabhash_traverse(a.infra->domain_rates, 0, rate_list, &a);
2689 }
2690
2691 /** do the ip_ratelimit_list command */
2692 static void
2693 do_ip_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2694 {
2695         struct ip_ratelimit_list_arg a;
2696         a.all = 0;
2697         a.infra = worker->env.infra_cache;
2698         a.now = *worker->env.now;
2699         a.ssl = ssl;
2700         arg = skipwhite(arg);
2701         if(strcmp(arg, "+a") == 0)
2702                 a.all = 1;
2703         if(a.infra->client_ip_rates==NULL ||
2704                 (a.all == 0 && infra_ip_ratelimit == 0))
2705                 return;
2706         slabhash_traverse(a.infra->client_ip_rates, 0, ip_rate_list, &a);
2707 }
2708
2709 /** tell other processes to execute the command */
2710 static void
2711 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
2712 {
2713         int i;
2714         if(!cmd || !ssl)
2715                 return;
2716         /* skip i=0 which is me */
2717         for(i=1; i<rc->worker->daemon->num; i++) {
2718                 worker_send_cmd(rc->worker->daemon->workers[i],
2719                         worker_cmd_remote);
2720                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
2721                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
2722                         ssl_printf(ssl, "error could not distribute cmd\n");
2723                         return;
2724                 }
2725         }
2726 }
2727
2728 /** check for name with end-of-string, space or tab after it */
2729 static int
2730 cmdcmp(char* p, const char* cmd, size_t len)
2731 {
2732         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
2733 }
2734
2735 /** execute a remote control command */
2736 static void
2737 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
2738         struct worker* worker)
2739 {
2740         char* p = skipwhite(cmd);
2741         /* compare command */
2742         if(cmdcmp(p, "stop", 4)) {
2743                 do_stop(ssl, rc);
2744                 return;
2745         } else if(cmdcmp(p, "reload", 6)) {
2746                 do_reload(ssl, rc);
2747                 return;
2748         } else if(cmdcmp(p, "stats_noreset", 13)) {
2749                 do_stats(ssl, rc, 0);
2750                 return;
2751         } else if(cmdcmp(p, "stats", 5)) {
2752                 do_stats(ssl, rc, 1);
2753                 return;
2754         } else if(cmdcmp(p, "status", 6)) {
2755                 do_status(ssl, worker);
2756                 return;
2757         } else if(cmdcmp(p, "dump_cache", 10)) {
2758                 (void)dump_cache(ssl, worker);
2759                 return;
2760         } else if(cmdcmp(p, "load_cache", 10)) {
2761                 if(load_cache(ssl, worker)) send_ok(ssl);
2762                 return;
2763         } else if(cmdcmp(p, "list_forwards", 13)) {
2764                 do_list_forwards(ssl, worker);
2765                 return;
2766         } else if(cmdcmp(p, "list_stubs", 10)) {
2767                 do_list_stubs(ssl, worker);
2768                 return;
2769         } else if(cmdcmp(p, "list_insecure", 13)) {
2770                 do_insecure_list(ssl, worker);
2771                 return;
2772         } else if(cmdcmp(p, "list_local_zones", 16)) {
2773                 do_list_local_zones(ssl, worker->daemon->local_zones);
2774                 return;
2775         } else if(cmdcmp(p, "list_local_data", 15)) {
2776                 do_list_local_data(ssl, worker, worker->daemon->local_zones);
2777                 return;
2778         } else if(cmdcmp(p, "view_list_local_zones", 21)) {
2779                 do_view_list_local_zones(ssl, worker, skipwhite(p+21));
2780                 return;
2781         } else if(cmdcmp(p, "view_list_local_data", 20)) {
2782                 do_view_list_local_data(ssl, worker, skipwhite(p+20));
2783                 return;
2784         } else if(cmdcmp(p, "ratelimit_list", 14)) {
2785                 do_ratelimit_list(ssl, worker, p+14);
2786                 return;
2787         } else if(cmdcmp(p, "ip_ratelimit_list", 17)) {
2788                 do_ip_ratelimit_list(ssl, worker, p+17);
2789                 return;
2790         } else if(cmdcmp(p, "stub_add", 8)) {
2791                 /* must always distribute this cmd */
2792                 if(rc) distribute_cmd(rc, ssl, cmd);
2793                 do_stub_add(ssl, worker, skipwhite(p+8));
2794                 return;
2795         } else if(cmdcmp(p, "stub_remove", 11)) {
2796                 /* must always distribute this cmd */
2797                 if(rc) distribute_cmd(rc, ssl, cmd);
2798                 do_stub_remove(ssl, worker, skipwhite(p+11));
2799                 return;
2800         } else if(cmdcmp(p, "forward_add", 11)) {
2801                 /* must always distribute this cmd */
2802                 if(rc) distribute_cmd(rc, ssl, cmd);
2803                 do_forward_add(ssl, worker, skipwhite(p+11));
2804                 return;
2805         } else if(cmdcmp(p, "forward_remove", 14)) {
2806                 /* must always distribute this cmd */
2807                 if(rc) distribute_cmd(rc, ssl, cmd);
2808                 do_forward_remove(ssl, worker, skipwhite(p+14));
2809                 return;
2810         } else if(cmdcmp(p, "insecure_add", 12)) {
2811                 /* must always distribute this cmd */
2812                 if(rc) distribute_cmd(rc, ssl, cmd);
2813                 do_insecure_add(ssl, worker, skipwhite(p+12));
2814                 return;
2815         } else if(cmdcmp(p, "insecure_remove", 15)) {
2816                 /* must always distribute this cmd */
2817                 if(rc) distribute_cmd(rc, ssl, cmd);
2818                 do_insecure_remove(ssl, worker, skipwhite(p+15));
2819                 return;
2820         } else if(cmdcmp(p, "forward", 7)) {
2821                 /* must always distribute this cmd */
2822                 if(rc) distribute_cmd(rc, ssl, cmd);
2823                 do_forward(ssl, worker, skipwhite(p+7));
2824                 return;
2825         } else if(cmdcmp(p, "flush_stats", 11)) {
2826                 /* must always distribute this cmd */
2827                 if(rc) distribute_cmd(rc, ssl, cmd);
2828                 do_flush_stats(ssl, worker);
2829                 return;
2830         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2831                 /* must always distribute this cmd */
2832                 if(rc) distribute_cmd(rc, ssl, cmd);
2833                 do_flush_requestlist(ssl, worker);
2834                 return;
2835         } else if(cmdcmp(p, "lookup", 6)) {
2836                 do_lookup(ssl, worker, skipwhite(p+6));
2837                 return;
2838         }
2839
2840 #ifdef THREADS_DISABLED
2841         /* other processes must execute the command as well */
2842         /* commands that should not be distributed, returned above. */
2843         if(rc) { /* only if this thread is the master (rc) thread */
2844                 /* done before the code below, which may split the string */
2845                 distribute_cmd(rc, ssl, cmd);
2846         }
2847 #endif
2848         if(cmdcmp(p, "verbosity", 9)) {
2849                 do_verbosity(ssl, skipwhite(p+9));
2850         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2851                 do_zone_remove(ssl, worker->daemon->local_zones, skipwhite(p+17));
2852         } else if(cmdcmp(p, "local_zones_remove", 18)) {
2853                 do_zones_remove(ssl, worker->daemon->local_zones);
2854         } else if(cmdcmp(p, "local_zone", 10)) {
2855                 do_zone_add(ssl, worker->daemon->local_zones, skipwhite(p+10));
2856         } else if(cmdcmp(p, "local_zones", 11)) {
2857                 do_zones_add(ssl, worker->daemon->local_zones);
2858         } else if(cmdcmp(p, "local_data_remove", 17)) {
2859                 do_data_remove(ssl, worker->daemon->local_zones, skipwhite(p+17));
2860         } else if(cmdcmp(p, "local_datas_remove", 18)) {
2861                 do_datas_remove(ssl, worker->daemon->local_zones);
2862         } else if(cmdcmp(p, "local_data", 10)) {
2863                 do_data_add(ssl, worker->daemon->local_zones, skipwhite(p+10));
2864         } else if(cmdcmp(p, "local_datas", 11)) {
2865                 do_datas_add(ssl, worker->daemon->local_zones);
2866         } else if(cmdcmp(p, "view_local_zone_remove", 22)) {
2867                 do_view_zone_remove(ssl, worker, skipwhite(p+22));
2868         } else if(cmdcmp(p, "view_local_zone", 15)) {
2869                 do_view_zone_add(ssl, worker, skipwhite(p+15));
2870         } else if(cmdcmp(p, "view_local_data_remove", 22)) {
2871                 do_view_data_remove(ssl, worker, skipwhite(p+22));
2872         } else if(cmdcmp(p, "view_local_data", 15)) {
2873                 do_view_data_add(ssl, worker, skipwhite(p+15));
2874         } else if(cmdcmp(p, "flush_zone", 10)) {
2875                 do_flush_zone(ssl, worker, skipwhite(p+10));
2876         } else if(cmdcmp(p, "flush_type", 10)) {
2877                 do_flush_type(ssl, worker, skipwhite(p+10));
2878         } else if(cmdcmp(p, "flush_infra", 11)) {
2879                 do_flush_infra(ssl, worker, skipwhite(p+11));
2880         } else if(cmdcmp(p, "flush", 5)) {
2881                 do_flush_name(ssl, worker, skipwhite(p+5));
2882         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2883                 do_dump_requestlist(ssl, worker);
2884         } else if(cmdcmp(p, "dump_infra", 10)) {
2885                 do_dump_infra(ssl, worker);
2886         } else if(cmdcmp(p, "log_reopen", 10)) {
2887                 do_log_reopen(ssl, worker);
2888         } else if(cmdcmp(p, "set_option", 10)) {
2889                 do_set_option(ssl, worker, skipwhite(p+10));
2890         } else if(cmdcmp(p, "get_option", 10)) {
2891                 do_get_option(ssl, worker, skipwhite(p+10));
2892         } else if(cmdcmp(p, "flush_bogus", 11)) {
2893                 do_flush_bogus(ssl, worker);
2894         } else if(cmdcmp(p, "flush_negative", 14)) {
2895                 do_flush_negative(ssl, worker);
2896         } else {
2897                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2898         }
2899 }
2900
2901 void
2902 daemon_remote_exec(struct worker* worker)
2903 {
2904         /* read the cmd string */
2905         uint8_t* msg = NULL;
2906         uint32_t len = 0;
2907         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2908                 log_err("daemon_remote_exec: tube_read_msg failed");
2909                 return;
2910         }
2911         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2912         execute_cmd(NULL, NULL, (char*)msg, worker);
2913         free(msg);
2914 }
2915
2916 /** handle remote control request */
2917 static void
2918 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2919 {
2920         int r;
2921         char pre[10];
2922         char magic[7];
2923         char buf[1024];
2924 #ifdef USE_WINSOCK
2925         /* makes it possible to set the socket blocking again. */
2926         /* basically removes it from winsock_event ... */
2927         WSAEventSelect(s->c->fd, NULL, 0);
2928 #endif
2929         fd_set_block(s->c->fd);
2930
2931         /* try to read magic UBCT[version]_space_ string */
2932         ERR_clear_error();
2933         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2934                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2935                         return;
2936                 log_crypto_err("could not SSL_read");
2937                 return;
2938         }
2939         magic[6] = 0;
2940         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2941                 verbose(VERB_QUERY, "control connection has bad magic string");
2942                 /* probably wrong tool connected, ignore it completely */
2943                 return;
2944         }
2945
2946         /* read the command line */
2947         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2948                 return;
2949         }
2950         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
2951         if(strcmp(magic, pre) != 0) {
2952                 verbose(VERB_QUERY, "control connection had bad "
2953                         "version %s, cmd: %s", magic, buf);
2954                 ssl_printf(ssl, "error version mismatch\n");
2955                 return;
2956         }
2957         verbose(VERB_DETAIL, "control cmd: %s", buf);
2958
2959         /* figure out what to do */
2960         execute_cmd(rc, ssl, buf, rc->worker);
2961 }
2962
2963 int remote_control_callback(struct comm_point* c, void* arg, int err,
2964         struct comm_reply* ATTR_UNUSED(rep))
2965 {
2966         struct rc_state* s = (struct rc_state*)arg;
2967         struct daemon_remote* rc = s->rc;
2968         int r;
2969         if(err != NETEVENT_NOERROR) {
2970                 if(err==NETEVENT_TIMEOUT)
2971                         log_err("remote control timed out");
2972                 clean_point(rc, s);
2973                 return 0;
2974         }
2975         /* (continue to) setup the SSL connection */
2976         ERR_clear_error();
2977         r = SSL_do_handshake(s->ssl);
2978         if(r != 1) {
2979                 int r2 = SSL_get_error(s->ssl, r);
2980                 if(r2 == SSL_ERROR_WANT_READ) {
2981                         if(s->shake_state == rc_hs_read) {
2982                                 /* try again later */
2983                                 return 0;
2984                         }
2985                         s->shake_state = rc_hs_read;
2986                         comm_point_listen_for_rw(c, 1, 0);
2987                         return 0;
2988                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
2989                         if(s->shake_state == rc_hs_write) {
2990                                 /* try again later */
2991                                 return 0;
2992                         }
2993                         s->shake_state = rc_hs_write;
2994                         comm_point_listen_for_rw(c, 0, 1);
2995                         return 0;
2996                 } else {
2997                         if(r == 0)
2998                                 log_err("remote control connection closed prematurely");
2999                         log_addr(1, "failed connection from",
3000                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
3001                         log_crypto_err("remote control failed ssl");
3002                         clean_point(rc, s);
3003                         return 0;
3004                 }
3005         }
3006         s->shake_state = rc_none;
3007
3008         /* once handshake has completed, check authentication */
3009         if (!rc->use_cert) {
3010                 verbose(VERB_ALGO, "unauthenticated remote control connection");
3011         } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
3012                 X509* x = SSL_get_peer_certificate(s->ssl);
3013                 if(!x) {
3014                         verbose(VERB_DETAIL, "remote control connection "
3015                                 "provided no client certificate");
3016                         clean_point(rc, s);
3017                         return 0;
3018                 }
3019                 verbose(VERB_ALGO, "remote control connection authenticated");
3020                 X509_free(x);
3021         } else {
3022                 verbose(VERB_DETAIL, "remote control connection failed to "
3023                         "authenticate with client certificate");
3024                 clean_point(rc, s);
3025                 return 0;
3026         }
3027
3028         /* if OK start to actually handle the request */
3029         handle_req(rc, s, s->ssl);
3030
3031         verbose(VERB_ALGO, "remote control operation completed");
3032         clean_point(rc, s);
3033         return 0;
3034 }