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 "services/authzone.h"
  72 #include "util/storage/slabhash.h"
  73 #include "util/fptr_wlist.h"
  74 #include "util/data/dname.h"
  75 #include "validator/validator.h"
  76 #include "validator/val_kcache.h"
  77 #include "validator/val_kentry.h"
  78 #include "validator/val_anchor.h"
  79 #include "iterator/iterator.h"
  80 #include "iterator/iter_fwd.h"
  81 #include "iterator/iter_hints.h"
  82 #include "iterator/iter_delegpt.h"
  83 #include "services/outbound_list.h"
  84 #include "services/outside_network.h"
  85 #include "sldns/str2wire.h"
  86 #include "sldns/parseutil.h"
  87 #include "sldns/wire2str.h"
  88 #include "sldns/sbuffer.h"
  89
  90 #ifdef HAVE_SYS_TYPES_H
  91 #  include <sys/types.h>
  92 #endif
  93 #ifdef HAVE_SYS_STAT_H
  94 #include <sys/stat.h>
  95 #endif
  96 #ifdef HAVE_NETDB_H
  97 #include <netdb.h>
  98 #endif
  99
 100 /* just for portability */
 101 #ifdef SQ
 102 #undef SQ
 103 #endif
 104
 105 /** what to put on statistics lines between var and value, ": " or "=" */
 106 #define SQ "="
 107 /** if true, inhibits a lot of =0 lines from the stats output */
 108 static const int inhibit_zero = 1;
 109
 110 /** subtract timers and the values do not overflow or become negative */
 111 static void
 112 timeval_subtract(struct timeval* d, const struct timeval* end,
 113         const struct timeval* start)
 114 {
 115 #ifndef S_SPLINT_S
 116         time_t end_usec = end->tv_usec;
 117         d->tv_sec = end->tv_sec - start->tv_sec;
 118         if(end_usec < start->tv_usec) {
 119                 end_usec += 1000000;
 120                 d->tv_sec--;
 121         }
 122         d->tv_usec = end_usec - start->tv_usec;
 123 #endif
 124 }
 125
 126 /** divide sum of timers to get average */
 127 static void
 128 timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
 129 {
 130 #ifndef S_SPLINT_S
 131         size_t leftover;
 132         if(d == 0) {
 133                 avg->tv_sec = 0;
 134                 avg->tv_usec = 0;
 135                 return;
 136         }
 137         avg->tv_sec = sum->tv_sec / d;
 138         avg->tv_usec = sum->tv_usec / d;
 139         /* handle fraction from seconds divide */
 140         leftover = sum->tv_sec - avg->tv_sec*d;
 141         avg->tv_usec += (leftover*1000000)/d;
 142 #endif
 143 }
 144
 145 /*
 146  * The following function was generated using the openssl utility, using
 147  * the command : "openssl dhparam -C 2048"
 148  * (some openssl versions reject DH that is 'too small', eg. 512).
 149  */
 150 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 151 #ifndef S_SPLINT_S
 152 static DH *get_dh2048(void)
 153 {
 154         static unsigned char dh2048_p[]={
 155                 0xE7,0x36,0x28,0x3B,0xE4,0xC3,0x32,0x1C,0x01,0xC3,0x67,0xD6,
 156                 0xF5,0xF3,0xDA,0xDC,0x71,0xC0,0x42,0x8B,0xE6,0xEB,0x8D,0x80,
 157                 0x35,0x7F,0x09,0x45,0x30,0xE5,0xB2,0x92,0x81,0x3F,0x08,0xCD,
 158                 0x36,0x5E,0x19,0x83,0x62,0xCC,0xAE,0x9B,0x81,0x66,0x24,0xEE,
 159                 0x16,0x6F,0xA9,0x9E,0xF4,0x82,0x1B,0xDD,0x46,0xC7,0x33,0x5D,
 160                 0xF4,0xCA,0xE6,0x8F,0xFC,0xD4,0xD8,0x58,0x94,0x24,0x5D,0xFF,
 161                 0x0A,0xE8,0xEF,0x3D,0xCE,0xBB,0x50,0x94,0xE0,0x5F,0xE8,0x41,
 162                 0xC3,0x35,0x30,0x37,0xD5,0xCB,0x8F,0x3D,0x95,0x15,0x1A,0x77,
 163                 0x42,0xB2,0x06,0x86,0xF6,0x09,0x66,0x0E,0x9A,0x25,0x94,0x3E,
 164                 0xD2,0x04,0x25,0x25,0x1D,0x23,0xEB,0xDC,0x4D,0x0C,0x83,0x28,
 165                 0x2E,0x15,0x81,0x2D,0xC1,0xAF,0x8D,0x36,0x64,0xE3,0x9A,0x83,
 166                 0x78,0xC2,0x8D,0xC0,0x9D,0xD9,0x3A,0x1C,0xC5,0x2B,0x50,0x68,
 167                 0x07,0xA9,0x4B,0x8C,0x07,0x57,0xD6,0x15,0x03,0x4E,0x9E,0x01,
 168                 0xF2,0x6F,0x35,0xAC,0x26,0x9C,0x92,0x68,0x61,0x13,0xFB,0x01,
 169                 0xBA,0x22,0x36,0x01,0x55,0xB6,0x62,0xD9,0xB2,0x98,0xCE,0x5D,
 170                 0x4B,0xA5,0x41,0xD6,0xE5,0x70,0x78,0x12,0x1F,0x64,0xB6,0x6F,
 171                 0xB0,0x91,0x51,0x91,0x92,0xC0,0x94,0x3A,0xD1,0x28,0x4D,0x30,
 172                 0x84,0x3E,0xE4,0xE4,0x7F,0x47,0x89,0xB1,0xB6,0x8C,0x8E,0x0E,
 173                 0x26,0xDB,0xCD,0x17,0x07,0x2A,0x21,0x7A,0xCC,0x68,0xE8,0x57,
 174                 0x94,0x9E,0x59,0x61,0xEC,0x20,0x34,0x26,0x0D,0x66,0x44,0xEB,
 175                 0x6F,0x02,0x58,0xE2,0xED,0xF6,0xF3,0x1B,0xBF,0x9E,0x45,0x52,
 176                 0x5A,0x49,0xA1,0x5B,
 177                 };
 178         static unsigned char dh2048_g[]={
 179                 0x02,
 180                 };
 181         DH *dh = NULL;
 182         BIGNUM *p = NULL, *g = NULL;
 183
 184         dh = DH_new();
 185         p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL);
 186         g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL);
 187         if (!dh || !p || !g)
 188                 goto err;
 189
 190 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 191         dh->p = p;
 192         dh->g = g;
 193 #else
 194         if (!DH_set0_pqg(dh, p, NULL, g))
 195                 goto err;
 196 #endif
 197         return dh;
 198 err:
 199         if (p)
 200                 BN_free(p);
 201         if (g)
 202                 BN_free(g);
 203         if (dh)
 204                 DH_free(dh);
 205         return NULL;
 206 }
 207 #endif /* SPLINT */
 208 #endif /* OPENSSL_VERSION_NUMBER < 0x10100000 */
 209
 210 struct daemon_remote*
 211 daemon_remote_create(struct config_file* cfg)
 212 {
 213         char* s_cert;
 214         char* s_key;
 215         struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 216                 sizeof(*rc));
 217         if(!rc) {
 218                 log_err("out of memory in daemon_remote_create");
 219                 return NULL;
 220         }
 221         rc->max_active = 10;
 222
 223         if(!cfg->remote_control_enable) {
 224                 rc->ctx = NULL;
 225                 return rc;
 226         }
 227         rc->ctx = SSL_CTX_new(SSLv23_server_method());
 228         if(!rc->ctx) {
 229                 log_crypto_err("could not SSL_CTX_new");
 230                 free(rc);
 231                 return NULL;
 232         }
 233         if(!listen_sslctx_setup(rc->ctx)) {
 234                 daemon_remote_delete(rc);
 235                 return NULL;
 236         }
 237
 238         if (cfg->remote_control_use_cert == 0) {
 239                 /* No certificates are requested */
 240 #if defined(SSL_OP_NO_TLSv1_3)
 241                 /* in openssl 1.1.1, negotiation code for tls 1.3 does
 242                  * not allow the unauthenticated aNULL and eNULL ciphers */
 243                 SSL_CTX_set_options(rc->ctx, SSL_OP_NO_TLSv1_3);
 244 #endif
 245 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL
 246                 SSL_CTX_set_security_level(rc->ctx, 0);
 247 #endif
 248                 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL:eNULL")) {
 249                         log_crypto_err("Failed to set aNULL cipher list");
 250                         daemon_remote_delete(rc);
 251                         return NULL;
 252                 }
 253
 254                 /* in openssl 1.1, the securitylevel 0 allows eNULL, that
 255                  * does not need the DH */
 256 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 257                 /* Since we have no certificates and hence no source of
 258                  * DH params, let's generate and set them
 259                  */
 260                 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh2048())) {
 261                         log_crypto_err("Wanted to set DH param, but failed");
 262                         daemon_remote_delete(rc);
 263                         return NULL;
 264                 }
 265 #endif
 266                 return rc;
 267         }
 268         rc->use_cert = 1;
 269         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 270         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 271         if(!s_cert || !s_key) {
 272                 log_err("out of memory in remote control fname");
 273                 goto setup_error;
 274         }
 275         verbose(VERB_ALGO, "setup SSL certificates");
 276         if (!SSL_CTX_use_certificate_chain_file(rc->ctx,s_cert)) {
 277                 log_err("Error for server-cert-file: %s", s_cert);
 278                 log_crypto_err("Error in SSL_CTX use_certificate_chain_file");
 279                 goto setup_error;
 280         }
 281         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 282                 log_err("Error for server-key-file: %s", s_key);
 283                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 284                 goto setup_error;
 285         }
 286         if(!SSL_CTX_check_private_key(rc->ctx)) {
 287                 log_err("Error for server-key-file: %s", s_key);
 288                 log_crypto_err("Error in SSL_CTX check_private_key");
 289                 goto setup_error;
 290         }
 291         listen_sslctx_setup_2(rc->ctx);
 292         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 293                 log_crypto_err("Error setting up SSL_CTX verify locations");
 294         setup_error:
 295                 free(s_cert);
 296                 free(s_key);
 297                 daemon_remote_delete(rc);
 298                 return NULL;
 299         }
 300         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 301         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 302         free(s_cert);
 303         free(s_key);
 304
 305         return rc;
 306 }
 307
 308 void daemon_remote_clear(struct daemon_remote* rc)
 309 {
 310         struct rc_state* p, *np;
 311         if(!rc) return;
 312         /* but do not close the ports */
 313         listen_list_delete(rc->accept_list);
 314         rc->accept_list = NULL;
 315         /* do close these sockets */
 316         p = rc->busy_list;
 317         while(p) {
 318                 np = p->next;
 319                 if(p->ssl)
 320                         SSL_free(p->ssl);
 321                 comm_point_delete(p->c);
 322                 free(p);
 323                 p = np;
 324         }
 325         rc->busy_list = NULL;
 326         rc->active = 0;
 327         rc->worker = NULL;
 328 }
 329
 330 void daemon_remote_delete(struct daemon_remote* rc)
 331 {
 332         if(!rc) return;
 333         daemon_remote_clear(rc);
 334         if(rc->ctx) {
 335                 SSL_CTX_free(rc->ctx);
 336         }
 337         free(rc);
 338 }
 339
 340 /**
 341  * Add and open a new control port
 342  * @param ip: ip str
 343  * @param nr: port nr
 344  * @param list: list head
 345  * @param noproto_is_err: if lack of protocol support is an error.
 346  * @param cfg: config with username for chown of unix-sockets.
 347  * @return false on failure.
 348  */
 349 static int
 350 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
 351         struct config_file* cfg)
 352 {
 353         struct addrinfo hints;
 354         struct addrinfo* res;
 355         struct listen_port* n;
 356         int noproto;
 357         int fd, r;
 358         char port[15];
 359         snprintf(port, sizeof(port), "%d", nr);
 360         port[sizeof(port)-1]=0;
 361         memset(&hints, 0, sizeof(hints));
 362
 363         if(ip[0] == '/') {
 364                 /* This looks like a local socket */
 365                 fd = create_local_accept_sock(ip, &noproto, cfg->use_systemd);
 366                 /*
 367                  * Change socket ownership and permissions so users other
 368                  * than root can access it provided they are in the same
 369                  * group as the user we run as.
 370                  */
 371                 if(fd != -1) {
 372 #ifdef HAVE_CHOWN
 373                         if (cfg->username && cfg->username[0] &&
 374                                 cfg_uid != (uid_t)-1) {
 375                                 if(chown(ip, cfg_uid, cfg_gid) == -1)
 376                                         verbose(VERB_QUERY, "cannot chown %u.%u %s: %s",
 377                                           (unsigned)cfg_uid, (unsigned)cfg_gid,
 378                                           ip, strerror(errno));
 379                         }
 380                         chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
 381 #else
 382                         (void)cfg;
 383 #endif
 384                 }
 385         } else {
 386                 hints.ai_socktype = SOCK_STREAM;
 387                 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 388                 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 389 #ifdef USE_WINSOCK
 390                         if(!noproto_is_err && r == EAI_NONAME) {
 391                                 /* tried to lookup the address as name */
 392                                 return 1; /* return success, but do nothing */
 393                         }
 394 #endif /* USE_WINSOCK */
 395                         log_err("control interface %s:%s getaddrinfo: %s %s",
 396                                 ip?ip:"default", port, gai_strerror(r),
 397 #ifdef EAI_SYSTEM
 398                                 r==EAI_SYSTEM?(char*)strerror(errno):""
 399 #else
 400                                 ""
 401 #endif
 402                         );
 403                         return 0;
 404                 }
 405
 406                 /* open fd */
 407                 fd = create_tcp_accept_sock(res, 1, &noproto, 0,
 408                         cfg->ip_transparent, 0, cfg->ip_freebind, cfg->use_systemd);
 409                 freeaddrinfo(res);
 410         }
 411
 412         if(fd == -1 && noproto) {
 413                 if(!noproto_is_err)
 414                         return 1; /* return success, but do nothing */
 415                 log_err("cannot open control interface %s %d : "
 416                         "protocol not supported", ip, nr);
 417                 return 0;
 418         }
 419         if(fd == -1) {
 420                 log_err("cannot open control interface %s %d", ip, nr);
 421                 return 0;
 422         }
 423
 424         /* alloc */
 425         n = (struct listen_port*)calloc(1, sizeof(*n));
 426         if(!n) {
 427 #ifndef USE_WINSOCK
 428                 close(fd);
 429 #else
 430                 closesocket(fd);
 431 #endif
 432                 log_err("out of memory");
 433                 return 0;
 434         }
 435         n->next = *list;
 436         *list = n;
 437         n->fd = fd;
 438         return 1;
 439 }
 440
 441 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 442 {
 443         struct listen_port* l = NULL;
 444         log_assert(cfg->remote_control_enable && cfg->control_port);
 445         if(cfg->control_ifs) {
 446                 struct config_strlist* p;
 447                 for(p = cfg->control_ifs; p; p = p->next) {
 448                         if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
 449                                 listening_ports_free(l);
 450                                 return NULL;
 451                         }
 452                 }
 453         } else {
 454                 /* defaults */
 455                 if(cfg->do_ip6 &&
 456                         !add_open("::1", cfg->control_port, &l, 0, cfg)) {
 457                         listening_ports_free(l);
 458                         return NULL;
 459                 }
 460                 if(cfg->do_ip4 &&
 461                         !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
 462                         listening_ports_free(l);
 463                         return NULL;
 464                 }
 465         }
 466         return l;
 467 }
 468
 469 /** open accept commpoint */
 470 static int
 471 accept_open(struct daemon_remote* rc, int fd)
 472 {
 473         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 474         if(!n) {
 475                 log_err("out of memory");
 476                 return 0;
 477         }
 478         n->next = rc->accept_list;
 479         rc->accept_list = n;
 480         /* open commpt */
 481         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 482                 &remote_accept_callback, rc);
 483         if(!n->com)
 484                 return 0;
 485         /* keep this port open, its fd is kept in the rc portlist */
 486         n->com->do_not_close = 1;
 487         return 1;
 488 }
 489
 490 int daemon_remote_open_accept(struct daemon_remote* rc,
 491         struct listen_port* ports, struct worker* worker)
 492 {
 493         struct listen_port* p;
 494         rc->worker = worker;
 495         for(p = ports; p; p = p->next) {
 496                 if(!accept_open(rc, p->fd)) {
 497                         log_err("could not create accept comm point");
 498                         return 0;
 499                 }
 500         }
 501         return 1;
 502 }
 503
 504 void daemon_remote_stop_accept(struct daemon_remote* rc)
 505 {
 506         struct listen_list* p;
 507         for(p=rc->accept_list; p; p=p->next) {
 508                 comm_point_stop_listening(p->com);
 509         }
 510 }
 511
 512 void daemon_remote_start_accept(struct daemon_remote* rc)
 513 {
 514         struct listen_list* p;
 515         for(p=rc->accept_list; p; p=p->next) {
 516                 comm_point_start_listening(p->com, -1, -1);
 517         }
 518 }
 519
 520 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 521         struct comm_reply* ATTR_UNUSED(rep))
 522 {
 523         struct daemon_remote* rc = (struct daemon_remote*)arg;
 524         struct sockaddr_storage addr;
 525         socklen_t addrlen;
 526         int newfd;
 527         struct rc_state* n;
 528         if(err != NETEVENT_NOERROR) {
 529                 log_err("error %d on remote_accept_callback", err);
 530                 return 0;
 531         }
 532         /* perform the accept */
 533         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 534         if(newfd == -1)
 535                 return 0;
 536         /* create new commpoint unless we are servicing already */
 537         if(rc->active >= rc->max_active) {
 538                 log_warn("drop incoming remote control: too many connections");
 539         close_exit:
 540 #ifndef USE_WINSOCK
 541                 close(newfd);
 542 #else
 543                 closesocket(newfd);
 544 #endif
 545                 return 0;
 546         }
 547
 548         /* setup commpoint to service the remote control command */
 549         n = (struct rc_state*)calloc(1, sizeof(*n));
 550         if(!n) {
 551                 log_err("out of memory");
 552                 goto close_exit;
 553         }
 554         /* start in reading state */
 555         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 556                 &remote_control_callback, n);
 557         if(!n->c) {
 558                 log_err("out of memory");
 559                 free(n);
 560                 goto close_exit;
 561         }
 562         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 563         n->c->do_not_close = 0;
 564         comm_point_stop_listening(n->c);
 565         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 566         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 567         n->c->repinfo.addrlen = addrlen;
 568         n->shake_state = rc_hs_read;
 569         n->ssl = SSL_new(rc->ctx);
 570         if(!n->ssl) {
 571                 log_crypto_err("could not SSL_new");
 572                 comm_point_delete(n->c);
 573                 free(n);
 574                 goto close_exit;
 575         }
 576         SSL_set_accept_state(n->ssl);
 577         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 578         if(!SSL_set_fd(n->ssl, newfd)) {
 579                 log_crypto_err("could not SSL_set_fd");
 580                 SSL_free(n->ssl);
 581                 comm_point_delete(n->c);
 582                 free(n);
 583                 goto close_exit;
 584         }
 585
 586         n->rc = rc;
 587         n->next = rc->busy_list;
 588         rc->busy_list = n;
 589         rc->active ++;
 590
 591         /* perform the first nonblocking read already, for windows,
 592          * so it can return wouldblock. could be faster too. */
 593         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 594         return 0;
 595 }
 596
 597 /** delete from list */
 598 static void
 599 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 600 {
 601         while(*list) {
 602                 if( (*list)->c == c) {
 603                         *list = (*list)->next;
 604                         return;
 605                 }
 606                 list = &(*list)->next;
 607         }
 608 }
 609
 610 /** decrease active count and remove commpoint from busy list */
 611 static void
 612 clean_point(struct daemon_remote* rc, struct rc_state* s)
 613 {
 614         state_list_remove_elem(&rc->busy_list, s->c);
 615         rc->active --;
 616         if(s->ssl) {
 617                 SSL_shutdown(s->ssl);
 618                 SSL_free(s->ssl);
 619         }
 620         comm_point_delete(s->c);
 621         free(s);
 622 }
 623
 624 int
 625 ssl_print_text(SSL* ssl, const char* text)
 626 {
 627         int r;
 628         if(!ssl)
 629                 return 0;
 630         ERR_clear_error();
 631         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 632                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 633                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 634                                 "closed connection");
 635                         return 0;
 636                 }
 637                 log_crypto_err("could not SSL_write");
 638                 return 0;
 639         }
 640         return 1;
 641 }
 642
 643 /** print text over the ssl connection */
 644 static int
 645 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 646 {
 647         char msg[1024];
 648         vsnprintf(msg, sizeof(msg), format, args);
 649         return ssl_print_text(ssl, msg);
 650 }
 651
 652 /** printf style printing to the ssl connection */
 653 int ssl_printf(SSL* ssl, const char* format, ...)
 654 {
 655         va_list args;
 656         int ret;
 657         va_start(args, format);
 658         ret = ssl_print_vmsg(ssl, format, args);
 659         va_end(args);
 660         return ret;
 661 }
 662
 663 int
 664 ssl_read_line(SSL* ssl, char* buf, size_t max)
 665 {
 666         int r;
 667         size_t len = 0;
 668         if(!ssl)
 669                 return 0;
 670         while(len < max) {
 671                 ERR_clear_error();
 672                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 673                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 674                                 buf[len] = 0;
 675                                 return 1;
 676                         }
 677                         log_crypto_err("could not SSL_read");
 678                         return 0;
 679                 }
 680                 if(buf[len] == '\n') {
 681                         /* return string without \n */
 682                         buf[len] = 0;
 683                         return 1;
 684                 }
 685                 len++;
 686         }
 687         buf[max-1] = 0;
 688         log_err("control line too long (%d): %s", (int)max, buf);
 689         return 0;
 690 }
 691
 692 /** skip whitespace, return new pointer into string */
 693 static char*
 694 skipwhite(char* str)
 695 {
 696         /* EOS \0 is not a space */
 697         while( isspace((unsigned char)*str) )
 698                 str++;
 699         return str;
 700 }
 701
 702 /** send the OK to the control client */
 703 static void send_ok(SSL* ssl)
 704 {
 705         (void)ssl_printf(ssl, "ok\n");
 706 }
 707
 708 /** do the stop command */
 709 static void
 710 do_stop(SSL* ssl, struct daemon_remote* rc)
 711 {
 712         rc->worker->need_to_exit = 1;
 713         comm_base_exit(rc->worker->base);
 714         send_ok(ssl);
 715 }
 716
 717 /** do the reload command */
 718 static void
 719 do_reload(SSL* ssl, struct daemon_remote* rc)
 720 {
 721         rc->worker->need_to_exit = 0;
 722         comm_base_exit(rc->worker->base);
 723         send_ok(ssl);
 724 }
 725
 726 /** do the verbosity command */
 727 static void
 728 do_verbosity(SSL* ssl, char* str)
 729 {
 730         int val = atoi(str);
 731         if(val == 0 && strcmp(str, "0") != 0) {
 732                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 733                 return;
 734         }
 735         verbosity = val;
 736         send_ok(ssl);
 737 }
 738
 739 /** print stats from statinfo */
 740 static int
 741 print_stats(SSL* ssl, const char* nm, struct ub_stats_info* s)
 742 {
 743         struct timeval sumwait, avg;
 744         if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 745                 (unsigned long)s->svr.num_queries)) return 0;
 746         if(!ssl_printf(ssl, "%s.num.queries_ip_ratelimited"SQ"%lu\n", nm,
 747                 (unsigned long)s->svr.num_queries_ip_ratelimited)) return 0;
 748         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
 749                 (unsigned long)(s->svr.num_queries
 750                         - s->svr.num_queries_missed_cache))) return 0;
 751         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 752                 (unsigned long)s->svr.num_queries_missed_cache)) return 0;
 753         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 754                 (unsigned long)s->svr.num_queries_prefetch)) return 0;
 755         if(!ssl_printf(ssl, "%s.num.zero_ttl"SQ"%lu\n", nm,
 756                 (unsigned long)s->svr.zero_ttl_responses)) return 0;
 757         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 758                 (unsigned long)s->mesh_replies_sent)) return 0;
 759 #ifdef USE_DNSCRYPT
 760         if(!ssl_printf(ssl, "%s.num.dnscrypt.crypted"SQ"%lu\n", nm,
 761                 (unsigned long)s->svr.num_query_dnscrypt_crypted)) return 0;
 762         if(!ssl_printf(ssl, "%s.num.dnscrypt.cert"SQ"%lu\n", nm,
 763                 (unsigned long)s->svr.num_query_dnscrypt_cert)) return 0;
 764         if(!ssl_printf(ssl, "%s.num.dnscrypt.cleartext"SQ"%lu\n", nm,
 765                 (unsigned long)s->svr.num_query_dnscrypt_cleartext)) return 0;
 766         if(!ssl_printf(ssl, "%s.num.dnscrypt.malformed"SQ"%lu\n", nm,
 767                 (unsigned long)s->svr.num_query_dnscrypt_crypted_malformed)) return 0;
 768 #endif
 769         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 770                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 771                         (double)s->svr.sum_query_list_size/
 772                         (double)(s->svr.num_queries_missed_cache+
 773                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 774         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm,
 775                 (unsigned long)s->svr.max_query_list_size)) return 0;
 776         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm,
 777                 (unsigned long)s->mesh_jostled)) return 0;
 778         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm,
 779                 (unsigned long)s->mesh_dropped)) return 0;
 780         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm,
 781                 (unsigned long)s->mesh_num_states)) return 0;
 782         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm,
 783                 (unsigned long)s->mesh_num_reply_states)) return 0;
 784 #ifndef S_SPLINT_S
 785         sumwait.tv_sec = s->mesh_replies_sum_wait_sec;
 786         sumwait.tv_usec = s->mesh_replies_sum_wait_usec;
 787 #endif
 788         timeval_divide(&avg, &sumwait, s->mesh_replies_sent);
 789         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 790                 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
 791         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 792                 s->mesh_time_median)) return 0;
 793         if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm,
 794                 (unsigned long)s->svr.tcp_accept_usage)) return 0;
 795         return 1;
 796 }
 797
 798 /** print stats for one thread */
 799 static int
 800 print_thread_stats(SSL* ssl, int i, struct ub_stats_info* s)
 801 {
 802         char nm[32];
 803         snprintf(nm, sizeof(nm), "thread%d", i);
 804         nm[sizeof(nm)-1]=0;
 805         return print_stats(ssl, nm, s);
 806 }
 807
 808 /** print long number */
 809 static int
 810 print_longnum(SSL* ssl, const char* desc, size_t x)
 811 {
 812         if(x > 1024*1024*1024) {
 813                 /* more than a Gb */
 814                 size_t front = x / (size_t)1000000;
 815                 size_t back = x % (size_t)1000000;
 816                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 817                         (unsigned)front, (unsigned)back);
 818         } else {
 819                 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
 820         }
 821 }
 822
 823 /** print mem stats */
 824 static int
 825 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 826 {
 827         size_t msg, rrset, val, iter, respip;
 828 #ifdef CLIENT_SUBNET
 829         size_t subnet = 0;
 830 #endif /* CLIENT_SUBNET */
 831 #ifdef USE_IPSECMOD
 832         size_t ipsecmod = 0;
 833 #endif /* USE_IPSECMOD */
 834 #ifdef USE_DNSCRYPT
 835         size_t dnscrypt_shared_secret = 0;
 836         size_t dnscrypt_nonce = 0;
 837 #endif /* USE_DNSCRYPT */
 838         msg = slabhash_get_mem(daemon->env->msg_cache);
 839         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 840         val = mod_get_mem(&worker->env, "validator");
 841         iter = mod_get_mem(&worker->env, "iterator");
 842         respip = mod_get_mem(&worker->env, "respip");
 843 #ifdef CLIENT_SUBNET
 844         subnet = mod_get_mem(&worker->env, "subnet");
 845 #endif /* CLIENT_SUBNET */
 846 #ifdef USE_IPSECMOD
 847         ipsecmod = mod_get_mem(&worker->env, "ipsecmod");
 848 #endif /* USE_IPSECMOD */
 849 #ifdef USE_DNSCRYPT
 850         if(daemon->dnscenv) {
 851                 dnscrypt_shared_secret = slabhash_get_mem(
 852                         daemon->dnscenv->shared_secrets_cache);
 853                 dnscrypt_nonce = slabhash_get_mem(daemon->dnscenv->nonces_cache);
 854         }
 855 #endif /* USE_DNSCRYPT */
 856
 857         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 858                 return 0;
 859         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 860                 return 0;
 861         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 862                 return 0;
 863         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 864                 return 0;
 865         if(!print_longnum(ssl, "mem.mod.respip"SQ, respip))
 866                 return 0;
 867 #ifdef CLIENT_SUBNET
 868         if(!print_longnum(ssl, "mem.mod.subnet"SQ, subnet))
 869                 return 0;
 870 #endif /* CLIENT_SUBNET */
 871 #ifdef USE_IPSECMOD
 872         if(!print_longnum(ssl, "mem.mod.ipsecmod"SQ, ipsecmod))
 873                 return 0;
 874 #endif /* USE_IPSECMOD */
 875 #ifdef USE_DNSCRYPT
 876         if(!print_longnum(ssl, "mem.cache.dnscrypt_shared_secret"SQ,
 877                         dnscrypt_shared_secret))
 878                 return 0;
 879         if(!print_longnum(ssl, "mem.cache.dnscrypt_nonce"SQ,
 880                         dnscrypt_nonce))
 881                 return 0;
 882 #endif /* USE_DNSCRYPT */
 883         return 1;
 884 }
 885
 886 /** print uptime stats */
 887 static int
 888 print_uptime(SSL* ssl, struct worker* worker, int reset)
 889 {
 890         struct timeval now = *worker->env.now_tv;
 891         struct timeval up, dt;
 892         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 893         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 894         if(reset)
 895                 worker->daemon->time_last_stat = now;
 896         if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 897                 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 898         if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 899                 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 900         if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 901                 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 902         return 1;
 903 }
 904
 905 /** print extended histogram */
 906 static int
 907 print_hist(SSL* ssl, struct ub_stats_info* s)
 908 {
 909         struct timehist* hist;
 910         size_t i;
 911         hist = timehist_setup();
 912         if(!hist) {
 913                 log_err("out of memory");
 914                 return 0;
 915         }
 916         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 917         for(i=0; i<hist->num; i++) {
 918                 if(!ssl_printf(ssl,
 919                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 920                         (int)hist->buckets[i].lower.tv_sec,
 921                         (int)hist->buckets[i].lower.tv_usec,
 922                         (int)hist->buckets[i].upper.tv_sec,
 923                         (int)hist->buckets[i].upper.tv_usec,
 924                         (unsigned long)hist->buckets[i].count)) {
 925                         timehist_delete(hist);
 926                         return 0;
 927                 }
 928         }
 929         timehist_delete(hist);
 930         return 1;
 931 }
 932
 933 /** print extended stats */
 934 static int
 935 print_ext(SSL* ssl, struct ub_stats_info* s)
 936 {
 937         int i;
 938         char nm[16];
 939         const sldns_rr_descriptor* desc;
 940         const sldns_lookup_table* lt;
 941         /* TYPE */
 942         for(i=0; i<UB_STATS_QTYPE_NUM; i++) {
 943                 if(inhibit_zero && s->svr.qtype[i] == 0)
 944                         continue;
 945                 desc = sldns_rr_descript((uint16_t)i);
 946                 if(desc && desc->_name) {
 947                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 948                 } else if (i == LDNS_RR_TYPE_IXFR) {
 949                         snprintf(nm, sizeof(nm), "IXFR");
 950                 } else if (i == LDNS_RR_TYPE_AXFR) {
 951                         snprintf(nm, sizeof(nm), "AXFR");
 952                 } else if (i == LDNS_RR_TYPE_MAILA) {
 953                         snprintf(nm, sizeof(nm), "MAILA");
 954                 } else if (i == LDNS_RR_TYPE_MAILB) {
 955                         snprintf(nm, sizeof(nm), "MAILB");
 956                 } else if (i == LDNS_RR_TYPE_ANY) {
 957                         snprintf(nm, sizeof(nm), "ANY");
 958                 } else {
 959                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 960                 }
 961                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 962                         nm, (unsigned long)s->svr.qtype[i])) return 0;
 963         }
 964         if(!inhibit_zero || s->svr.qtype_big) {
 965                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 966                         (unsigned long)s->svr.qtype_big)) return 0;
 967         }
 968         /* CLASS */
 969         for(i=0; i<UB_STATS_QCLASS_NUM; i++) {
 970                 if(inhibit_zero && s->svr.qclass[i] == 0)
 971                         continue;
 972                 lt = sldns_lookup_by_id(sldns_rr_classes, i);
 973                 if(lt && lt->name) {
 974                         snprintf(nm, sizeof(nm), "%s", lt->name);
 975                 } else {
 976                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 977                 }
 978                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 979                         nm, (unsigned long)s->svr.qclass[i])) return 0;
 980         }
 981         if(!inhibit_zero || s->svr.qclass_big) {
 982                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 983                         (unsigned long)s->svr.qclass_big)) return 0;
 984         }
 985         /* OPCODE */
 986         for(i=0; i<UB_STATS_OPCODE_NUM; i++) {
 987                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 988                         continue;
 989                 lt = sldns_lookup_by_id(sldns_opcodes, i);
 990                 if(lt && lt->name) {
 991                         snprintf(nm, sizeof(nm), "%s", lt->name);
 992                 } else {
 993                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 994                 }
 995                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 996                         nm, (unsigned long)s->svr.qopcode[i])) return 0;
 997         }
 998         /* transport */
 999         if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
1000                 (unsigned long)s->svr.qtcp)) return 0;
1001         if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
1002                 (unsigned long)s->svr.qtcp_outgoing)) return 0;
1003         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
1004                 (unsigned long)s->svr.qipv6)) return 0;
1005         /* flags */
1006         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
1007                 (unsigned long)s->svr.qbit_QR)) return 0;
1008         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
1009                 (unsigned long)s->svr.qbit_AA)) return 0;
1010         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
1011                 (unsigned long)s->svr.qbit_TC)) return 0;
1012         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
1013                 (unsigned long)s->svr.qbit_RD)) return 0;
1014         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
1015                 (unsigned long)s->svr.qbit_RA)) return 0;
1016         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
1017                 (unsigned long)s->svr.qbit_Z)) return 0;
1018         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
1019                 (unsigned long)s->svr.qbit_AD)) return 0;
1020         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
1021                 (unsigned long)s->svr.qbit_CD)) return 0;
1022         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
1023                 (unsigned long)s->svr.qEDNS)) return 0;
1024         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
1025                 (unsigned long)s->svr.qEDNS_DO)) return 0;
1026
1027         /* RCODE */
1028         for(i=0; i<UB_STATS_RCODE_NUM; i++) {
1029                 /* Always include RCODEs 0-5 */
1030                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
1031                         continue;
1032                 lt = sldns_lookup_by_id(sldns_rcodes, i);
1033                 if(lt && lt->name) {
1034                         snprintf(nm, sizeof(nm), "%s", lt->name);
1035                 } else {
1036                         snprintf(nm, sizeof(nm), "RCODE%d", i);
1037                 }
1038                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
1039                         nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
1040         }
1041         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
1042                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
1043                         (unsigned long)s->svr.ans_rcode_nodata)) return 0;
1044         }
1045         /* iteration */
1046         if(!ssl_printf(ssl, "num.query.ratelimited"SQ"%lu\n",
1047                 (unsigned long)s->svr.queries_ratelimited)) return 0;
1048         /* validation */
1049         if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
1050                 (unsigned long)s->svr.ans_secure)) return 0;
1051         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
1052                 (unsigned long)s->svr.ans_bogus)) return 0;
1053         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
1054                 (unsigned long)s->svr.rrset_bogus)) return 0;
1055         if(!ssl_printf(ssl, "num.query.aggressive.NOERROR"SQ"%lu\n",
1056                 (unsigned long)s->svr.num_neg_cache_noerror)) return 0;
1057         if(!ssl_printf(ssl, "num.query.aggressive.NXDOMAIN"SQ"%lu\n",
1058                 (unsigned long)s->svr.num_neg_cache_nxdomain)) return 0;
1059         /* threat detection */
1060         if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
1061                 (unsigned long)s->svr.unwanted_queries)) return 0;
1062         if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
1063                 (unsigned long)s->svr.unwanted_replies)) return 0;
1064         /* cache counts */
1065         if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
1066                 (unsigned)s->svr.msg_cache_count)) return 0;
1067         if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n",
1068                 (unsigned)s->svr.rrset_cache_count)) return 0;
1069         if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n",
1070                 (unsigned)s->svr.infra_cache_count)) return 0;
1071         if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
1072                 (unsigned)s->svr.key_cache_count)) return 0;
1073 #ifdef USE_DNSCRYPT
1074         if(!ssl_printf(ssl, "dnscrypt_shared_secret.cache.count"SQ"%u\n",
1075                 (unsigned)s->svr.shared_secret_cache_count)) return 0;
1076         if(!ssl_printf(ssl, "dnscrypt_nonce.cache.count"SQ"%u\n",
1077                 (unsigned)s->svr.nonce_cache_count)) return 0;
1078         if(!ssl_printf(ssl, "num.query.dnscrypt.shared_secret.cachemiss"SQ"%lu\n",
1079                 (unsigned long)s->svr.num_query_dnscrypt_secret_missed_cache)) return 0;
1080         if(!ssl_printf(ssl, "num.query.dnscrypt.replay"SQ"%lu\n",
1081                 (unsigned long)s->svr.num_query_dnscrypt_replay)) return 0;
1082 #endif /* USE_DNSCRYPT */
1083         if(!ssl_printf(ssl, "num.query.authzone.up"SQ"%lu\n",
1084                 (unsigned long)s->svr.num_query_authzone_up)) return 0;
1085         if(!ssl_printf(ssl, "num.query.authzone.down"SQ"%lu\n",
1086                 (unsigned long)s->svr.num_query_authzone_down)) return 0;
1087         return 1;
1088 }
1089
1090 /** do the stats command */
1091 static void
1092 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
1093 {
1094         struct daemon* daemon = rc->worker->daemon;
1095         struct ub_stats_info total;
1096         struct ub_stats_info s;
1097         int i;
1098         log_assert(daemon->num > 0);
1099         /* gather all thread statistics in one place */
1100         for(i=0; i<daemon->num; i++) {
1101                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
1102                 if(!print_thread_stats(ssl, i, &s))
1103                         return;
1104                 if(i == 0)
1105                         total = s;
1106                 else    server_stats_add(&total, &s);
1107         }
1108         /* print the thread statistics */
1109         total.mesh_time_median /= (double)daemon->num;
1110         if(!print_stats(ssl, "total", &total))
1111                 return;
1112         if(!print_uptime(ssl, rc->worker, reset))
1113                 return;
1114         if(daemon->cfg->stat_extended) {
1115                 if(!print_mem(ssl, rc->worker, daemon))
1116                         return;
1117                 if(!print_hist(ssl, &total))
1118                         return;
1119                 if(!print_ext(ssl, &total))
1120                         return;
1121         }
1122 }
1123
1124 /** parse commandline argument domain name */
1125 static int
1126 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
1127 {
1128         uint8_t nm[LDNS_MAX_DOMAINLEN+1];
1129         size_t nmlen = sizeof(nm);
1130         int status;
1131         *res = NULL;
1132         *len = 0;
1133         *labs = 0;
1134         status = sldns_str2wire_dname_buf(str, nm, &nmlen);
1135         if(status != 0) {
1136                 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str,
1137                         LDNS_WIREPARSE_OFFSET(status),
1138                         sldns_get_errorstr_parse(status));
1139                 return 0;
1140         }
1141         *res = memdup(nm, nmlen);
1142         if(!*res) {
1143                 ssl_printf(ssl, "error out of memory\n");
1144                 return 0;
1145         }
1146         *labs = dname_count_size_labels(*res, len);
1147         return 1;
1148 }
1149
1150 /** find second argument, modifies string */
1151 static int
1152 find_arg2(SSL* ssl, char* arg, char** arg2)
1153 {
1154         char* as = strchr(arg, ' ');
1155         char* at = strchr(arg, '\t');
1156         if(as && at) {
1157                 if(at < as)
1158                         as = at;
1159                 as[0]=0;
1160                 *arg2 = skipwhite(as+1);
1161         } else if(as) {
1162                 as[0]=0;
1163                 *arg2 = skipwhite(as+1);
1164         } else if(at) {
1165                 at[0]=0;
1166                 *arg2 = skipwhite(at+1);
1167         } else {
1168                 ssl_printf(ssl, "error could not find next argument "
1169                         "after %s\n", arg);
1170                 return 0;
1171         }
1172         return 1;
1173 }
1174
1175 /** Add a new zone */
1176 static int
1177 perform_zone_add(SSL* ssl, struct local_zones* zones, char* arg)
1178 {
1179         uint8_t* nm;
1180         int nmlabs;
1181         size_t nmlen;
1182         char* arg2;
1183         enum localzone_type t;
1184         struct local_zone* z;
1185         if(!find_arg2(ssl, arg, &arg2))
1186                 return 0;
1187         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1188                 return 0;
1189         if(!local_zone_str2type(arg2, &t)) {
1190                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
1191                 free(nm);
1192                 return 0;
1193         }
1194         lock_rw_wrlock(&zones->lock);
1195         if((z=local_zones_find(zones, nm, nmlen,
1196                 nmlabs, LDNS_RR_CLASS_IN))) {
1197                 /* already present in tree */
1198                 lock_rw_wrlock(&z->lock);
1199                 z->type = t; /* update type anyway */
1200                 lock_rw_unlock(&z->lock);
1201                 free(nm);
1202                 lock_rw_unlock(&zones->lock);
1203                 return 1;
1204         }
1205         if(!local_zones_add_zone(zones, nm, nmlen,
1206                 nmlabs, LDNS_RR_CLASS_IN, t)) {
1207                 lock_rw_unlock(&zones->lock);
1208                 ssl_printf(ssl, "error out of memory\n");
1209                 return 0;
1210         }
1211         lock_rw_unlock(&zones->lock);
1212         return 1;
1213 }
1214
1215 /** Do the local_zone command */
1216 static void
1217 do_zone_add(SSL* ssl, struct local_zones* zones, char* arg)
1218 {
1219         if(!perform_zone_add(ssl, zones, arg))
1220                 return;
1221         send_ok(ssl);
1222 }
1223
1224 /** Do the local_zones command */
1225 static void
1226 do_zones_add(SSL* ssl, struct local_zones* zones)
1227 {
1228         char buf[2048];
1229         int num = 0;
1230         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1231                 if(buf[0] == 0x04 && buf[1] == 0)
1232                         break; /* end of transmission */
1233                 if(!perform_zone_add(ssl, zones, buf)) {
1234                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1235                                 return;
1236                 }
1237                 else
1238                         num++;
1239         }
1240         (void)ssl_printf(ssl, "added %d zones\n", num);
1241 }
1242
1243 /** Remove a zone */
1244 static int
1245 perform_zone_remove(SSL* ssl, struct local_zones* zones, char* arg)
1246 {
1247         uint8_t* nm;
1248         int nmlabs;
1249         size_t nmlen;
1250         struct local_zone* z;
1251         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1252                 return 0;
1253         lock_rw_wrlock(&zones->lock);
1254         if((z=local_zones_find(zones, nm, nmlen,
1255                 nmlabs, LDNS_RR_CLASS_IN))) {
1256                 /* present in tree */
1257                 local_zones_del_zone(zones, z);
1258         }
1259         lock_rw_unlock(&zones->lock);
1260         free(nm);
1261         return 1;
1262 }
1263
1264 /** Do the local_zone_remove command */
1265 static void
1266 do_zone_remove(SSL* ssl, struct local_zones* zones, char* arg)
1267 {
1268         if(!perform_zone_remove(ssl, zones, arg))
1269                 return;
1270         send_ok(ssl);
1271 }
1272
1273 /** Do the local_zones_remove command */
1274 static void
1275 do_zones_remove(SSL* ssl, struct local_zones* zones)
1276 {
1277         char buf[2048];
1278         int num = 0;
1279         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1280                 if(buf[0] == 0x04 && buf[1] == 0)
1281                         break; /* end of transmission */
1282                 if(!perform_zone_remove(ssl, zones, buf)) {
1283                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1284                                 return;
1285                 }
1286                 else
1287                         num++;
1288         }
1289         (void)ssl_printf(ssl, "removed %d zones\n", num);
1290 }
1291
1292 /** Add new RR data */
1293 static int
1294 perform_data_add(SSL* ssl, struct local_zones* zones, char* arg)
1295 {
1296         if(!local_zones_add_RR(zones, arg)) {
1297                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1298                 return 0;
1299         }
1300         return 1;
1301 }
1302
1303 /** Do the local_data command */
1304 static void
1305 do_data_add(SSL* ssl, struct local_zones* zones, char* arg)
1306 {
1307         if(!perform_data_add(ssl, zones, arg))
1308                 return;
1309         send_ok(ssl);
1310 }
1311
1312 /** Do the local_datas command */
1313 static void
1314 do_datas_add(SSL* ssl, struct local_zones* zones)
1315 {
1316         char buf[2048];
1317         int num = 0;
1318         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1319                 if(buf[0] == 0x04 && buf[1] == 0)
1320                         break; /* end of transmission */
1321                 if(!perform_data_add(ssl, zones, buf)) {
1322                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1323                                 return;
1324                 }
1325                 else
1326                         num++;
1327         }
1328         (void)ssl_printf(ssl, "added %d datas\n", num);
1329 }
1330
1331 /** Remove RR data */
1332 static int
1333 perform_data_remove(SSL* ssl, struct local_zones* zones, char* arg)
1334 {
1335         uint8_t* nm;
1336         int nmlabs;
1337         size_t nmlen;
1338         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1339                 return 0;
1340         local_zones_del_data(zones, nm,
1341                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1342         free(nm);
1343         return 1;
1344 }
1345
1346 /** Do the local_data_remove command */
1347 static void
1348 do_data_remove(SSL* ssl, struct local_zones* zones, char* arg)
1349 {
1350         if(!perform_data_remove(ssl, zones, arg))
1351                 return;
1352         send_ok(ssl);
1353 }
1354
1355 /** Do the local_datas_remove command */
1356 static void
1357 do_datas_remove(SSL* ssl, struct local_zones* zones)
1358 {
1359         char buf[2048];
1360         int num = 0;
1361         while(ssl_read_line(ssl, buf, sizeof(buf))) {
1362                 if(buf[0] == 0x04 && buf[1] == 0)
1363                         break; /* end of transmission */
1364                 if(!perform_data_remove(ssl, zones, buf)) {
1365                         if(!ssl_printf(ssl, "error for input line: %s\n", buf))
1366                                 return;
1367                 }
1368                 else
1369                         num++;
1370         }
1371         (void)ssl_printf(ssl, "removed %d datas\n", num);
1372 }
1373
1374 /** Add a new zone to view */
1375 static void
1376 do_view_zone_add(SSL* ssl, struct worker* worker, char* arg)
1377 {
1378         char* arg2;
1379         struct view* v;
1380         if(!find_arg2(ssl, arg, &arg2))
1381                 return;
1382         v = views_find_view(worker->daemon->views,
1383                 arg, 1 /* get write lock*/);
1384         if(!v) {
1385                 ssl_printf(ssl,"no view with name: %s\n", arg);
1386                 return;
1387         }
1388         if(!v->local_zones) {
1389                 if(!(v->local_zones = local_zones_create())){
1390                         lock_rw_unlock(&v->lock);
1391                         ssl_printf(ssl,"error out of memory\n");
1392                         return;
1393                 }
1394                 if(!v->isfirst) {
1395                         /* Global local-zone is not used for this view,
1396                          * therefore add defaults to this view-specic
1397                          * local-zone. */
1398                         struct config_file lz_cfg;
1399                         memset(&lz_cfg, 0, sizeof(lz_cfg));
1400                         local_zone_enter_defaults(v->local_zones, &lz_cfg);
1401                 }
1402         }
1403         do_zone_add(ssl, v->local_zones, arg2);
1404         lock_rw_unlock(&v->lock);
1405 }
1406
1407 /** Remove a zone from view */
1408 static void
1409 do_view_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1410 {
1411         char* arg2;
1412         struct view* v;
1413         if(!find_arg2(ssl, arg, &arg2))
1414                 return;
1415         v = views_find_view(worker->daemon->views,
1416                 arg, 1 /* get write lock*/);
1417         if(!v) {
1418                 ssl_printf(ssl,"no view with name: %s\n", arg);
1419                 return;
1420         }
1421         if(!v->local_zones) {
1422                 lock_rw_unlock(&v->lock);
1423                 send_ok(ssl);
1424                 return;
1425         }
1426         do_zone_remove(ssl, v->local_zones, arg2);
1427         lock_rw_unlock(&v->lock);
1428 }
1429
1430 /** Add new RR data to view */
1431 static void
1432 do_view_data_add(SSL* ssl, struct worker* worker, char* arg)
1433 {
1434         char* arg2;
1435         struct view* v;
1436         if(!find_arg2(ssl, arg, &arg2))
1437                 return;
1438         v = views_find_view(worker->daemon->views,
1439                 arg, 1 /* get write lock*/);
1440         if(!v) {
1441                 ssl_printf(ssl,"no view with name: %s\n", arg);
1442                 return;
1443         }
1444         if(!v->local_zones) {
1445                 if(!(v->local_zones = local_zones_create())){
1446                         lock_rw_unlock(&v->lock);
1447                         ssl_printf(ssl,"error out of memory\n");
1448                         return;
1449                 }
1450         }
1451         do_data_add(ssl, v->local_zones, arg2);
1452         lock_rw_unlock(&v->lock);
1453 }
1454
1455 /** Remove RR data from view */
1456 static void
1457 do_view_data_remove(SSL* ssl, struct worker* worker, char* arg)
1458 {
1459         char* arg2;
1460         struct view* v;
1461         if(!find_arg2(ssl, arg, &arg2))
1462                 return;
1463         v = views_find_view(worker->daemon->views,
1464                 arg, 1 /* get write lock*/);
1465         if(!v) {
1466                 ssl_printf(ssl,"no view with name: %s\n", arg);
1467                 return;
1468         }
1469         if(!v->local_zones) {
1470                 lock_rw_unlock(&v->lock);
1471                 send_ok(ssl);
1472                 return;
1473         }
1474         do_data_remove(ssl, v->local_zones, arg2);
1475         lock_rw_unlock(&v->lock);
1476 }
1477
1478 /** cache lookup of nameservers */
1479 static void
1480 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1481 {
1482         uint8_t* nm;
1483         int nmlabs;
1484         size_t nmlen;
1485         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1486                 return;
1487         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1488         free(nm);
1489 }
1490
1491 /** flush something from rrset and msg caches */
1492 static void
1493 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1494         uint16_t t, uint16_t c)
1495 {
1496         hashvalue_type h;
1497         struct query_info k;
1498         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1499         if(t == LDNS_RR_TYPE_SOA)
1500                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1501                         PACKED_RRSET_SOA_NEG);
1502         k.qname = nm;
1503         k.qname_len = nmlen;
1504         k.qtype = t;
1505         k.qclass = c;
1506         k.local_alias = NULL;
1507         h = query_info_hash(&k, 0);
1508         slabhash_remove(worker->env.msg_cache, h, &k);
1509         if(t == LDNS_RR_TYPE_AAAA) {
1510                 /* for AAAA also flush dns64 bit_cd packet */
1511                 h = query_info_hash(&k, BIT_CD);
1512                 slabhash_remove(worker->env.msg_cache, h, &k);
1513         }
1514 }
1515
1516 /** flush a type */
1517 static void
1518 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1519 {
1520         uint8_t* nm;
1521         int nmlabs;
1522         size_t nmlen;
1523         char* arg2;
1524         uint16_t t;
1525         if(!find_arg2(ssl, arg, &arg2))
1526                 return;
1527         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1528                 return;
1529         t = sldns_get_rr_type_by_name(arg2);
1530         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1531
1532         free(nm);
1533         send_ok(ssl);
1534 }
1535
1536 /** flush statistics */
1537 static void
1538 do_flush_stats(SSL* ssl, struct worker* worker)
1539 {
1540         worker_stats_clear(worker);
1541         send_ok(ssl);
1542 }
1543
1544 /**
1545  * Local info for deletion functions
1546  */
1547 struct del_info {
1548         /** worker */
1549         struct worker* worker;
1550         /** name to delete */
1551         uint8_t* name;
1552         /** length */
1553         size_t len;
1554         /** labels */
1555         int labs;
1556         /** time to invalidate to */
1557         time_t expired;
1558         /** number of rrsets removed */
1559         size_t num_rrsets;
1560         /** number of msgs removed */
1561         size_t num_msgs;
1562         /** number of key entries removed */
1563         size_t num_keys;
1564         /** length of addr */
1565         socklen_t addrlen;
1566         /** socket address for host deletion */
1567         struct sockaddr_storage addr;
1568 };
1569
1570 /** callback to delete hosts in infra cache */
1571 static void
1572 infra_del_host(struct lruhash_entry* e, void* arg)
1573 {
1574         /* entry is locked */
1575         struct del_info* inf = (struct del_info*)arg;
1576         struct infra_key* k = (struct infra_key*)e->key;
1577         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1578                 struct infra_data* d = (struct infra_data*)e->data;
1579                 d->probedelay = 0;
1580                 d->timeout_A = 0;
1581                 d->timeout_AAAA = 0;
1582                 d->timeout_other = 0;
1583                 rtt_init(&d->rtt);
1584                 if(d->ttl > inf->expired) {
1585                         d->ttl = inf->expired;
1586                         inf->num_keys++;
1587                 }
1588         }
1589 }
1590
1591 /** flush infra cache */
1592 static void
1593 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1594 {
1595         struct sockaddr_storage addr;
1596         socklen_t len;
1597         struct del_info inf;
1598         if(strcmp(arg, "all") == 0) {
1599                 slabhash_clear(worker->env.infra_cache->hosts);
1600                 send_ok(ssl);
1601                 return;
1602         }
1603         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1604                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1605                 return;
1606         }
1607         /* delete all entries from cache */
1608         /* what we do is to set them all expired */
1609         inf.worker = worker;
1610         inf.name = 0;
1611         inf.len = 0;
1612         inf.labs = 0;
1613         inf.expired = *worker->env.now;
1614         inf.expired -= 3; /* handle 3 seconds skew between threads */
1615         inf.num_rrsets = 0;
1616         inf.num_msgs = 0;
1617         inf.num_keys = 0;
1618         inf.addrlen = len;
1619         memmove(&inf.addr, &addr, len);
1620         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1621                 &inf);
1622         send_ok(ssl);
1623 }
1624
1625 /** flush requestlist */
1626 static void
1627 do_flush_requestlist(SSL* ssl, struct worker* worker)
1628 {
1629         mesh_delete_all(worker->env.mesh);
1630         send_ok(ssl);
1631 }
1632
1633 /** callback to delete rrsets in a zone */
1634 static void
1635 zone_del_rrset(struct lruhash_entry* e, void* arg)
1636 {
1637         /* entry is locked */
1638         struct del_info* inf = (struct del_info*)arg;
1639         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1640         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1641                 struct packed_rrset_data* d =
1642                         (struct packed_rrset_data*)e->data;
1643                 if(d->ttl > inf->expired) {
1644                         d->ttl = inf->expired;
1645                         inf->num_rrsets++;
1646                 }
1647         }
1648 }
1649
1650 /** callback to delete messages in a zone */
1651 static void
1652 zone_del_msg(struct lruhash_entry* e, void* arg)
1653 {
1654         /* entry is locked */
1655         struct del_info* inf = (struct del_info*)arg;
1656         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1657         if(dname_subdomain_c(k->key.qname, inf->name)) {
1658                 struct reply_info* d = (struct reply_info*)e->data;
1659                 if(d->ttl > inf->expired) {
1660                         d->ttl = inf->expired;
1661                         d->prefetch_ttl = inf->expired;
1662                         inf->num_msgs++;
1663                 }
1664         }
1665 }
1666
1667 /** callback to delete keys in zone */
1668 static void
1669 zone_del_kcache(struct lruhash_entry* e, void* arg)
1670 {
1671         /* entry is locked */
1672         struct del_info* inf = (struct del_info*)arg;
1673         struct key_entry_key* k = (struct key_entry_key*)e->key;
1674         if(dname_subdomain_c(k->name, inf->name)) {
1675                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1676                 if(d->ttl > inf->expired) {
1677                         d->ttl = inf->expired;
1678                         inf->num_keys++;
1679                 }
1680         }
1681 }
1682
1683 /** remove all rrsets and keys from zone from cache */
1684 static void
1685 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1686 {
1687         uint8_t* nm;
1688         int nmlabs;
1689         size_t nmlen;
1690         struct del_info inf;
1691         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1692                 return;
1693         /* delete all RRs and key entries from zone */
1694         /* what we do is to set them all expired */
1695         inf.worker = worker;
1696         inf.name = nm;
1697         inf.len = nmlen;
1698         inf.labs = nmlabs;
1699         inf.expired = *worker->env.now;
1700         inf.expired -= 3; /* handle 3 seconds skew between threads */
1701         inf.num_rrsets = 0;
1702         inf.num_msgs = 0;
1703         inf.num_keys = 0;
1704         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1705                 &zone_del_rrset, &inf);
1706
1707         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1708
1709         /* and validator cache */
1710         if(worker->env.key_cache) {
1711                 slabhash_traverse(worker->env.key_cache->slab, 1,
1712                         &zone_del_kcache, &inf);
1713         }
1714
1715         free(nm);
1716
1717         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1718                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1719                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1720 }
1721
1722 /** callback to delete bogus rrsets */
1723 static void
1724 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1725 {
1726         /* entry is locked */
1727         struct del_info* inf = (struct del_info*)arg;
1728         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1729         if(d->security == sec_status_bogus) {
1730                 d->ttl = inf->expired;
1731                 inf->num_rrsets++;
1732         }
1733 }
1734
1735 /** callback to delete bogus messages */
1736 static void
1737 bogus_del_msg(struct lruhash_entry* e, void* arg)
1738 {
1739         /* entry is locked */
1740         struct del_info* inf = (struct del_info*)arg;
1741         struct reply_info* d = (struct reply_info*)e->data;
1742         if(d->security == sec_status_bogus) {
1743                 d->ttl = inf->expired;
1744                 inf->num_msgs++;
1745         }
1746 }
1747
1748 /** callback to delete bogus keys */
1749 static void
1750 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1751 {
1752         /* entry is locked */
1753         struct del_info* inf = (struct del_info*)arg;
1754         struct key_entry_data* d = (struct key_entry_data*)e->data;
1755         if(d->isbad) {
1756                 d->ttl = inf->expired;
1757                 inf->num_keys++;
1758         }
1759 }
1760
1761 /** remove all bogus rrsets, msgs and keys from cache */
1762 static void
1763 do_flush_bogus(SSL* ssl, struct worker* worker)
1764 {
1765         struct del_info inf;
1766         /* what we do is to set them all expired */
1767         inf.worker = worker;
1768         inf.expired = *worker->env.now;
1769         inf.expired -= 3; /* handle 3 seconds skew between threads */
1770         inf.num_rrsets = 0;
1771         inf.num_msgs = 0;
1772         inf.num_keys = 0;
1773         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1774                 &bogus_del_rrset, &inf);
1775
1776         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1777
1778         /* and validator cache */
1779         if(worker->env.key_cache) {
1780                 slabhash_traverse(worker->env.key_cache->slab, 1,
1781                         &bogus_del_kcache, &inf);
1782         }
1783
1784         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1785                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1786                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1787 }
1788
1789 /** callback to delete negative and servfail rrsets */
1790 static void
1791 negative_del_rrset(struct lruhash_entry* e, void* arg)
1792 {
1793         /* entry is locked */
1794         struct del_info* inf = (struct del_info*)arg;
1795         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1796         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1797         /* delete the parentside negative cache rrsets,
1798          * these are nameserver rrsets that failed lookup, rdata empty */
1799         if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 &&
1800                 d->rrsig_count == 0 && d->rr_len[0] == 0) {
1801                 d->ttl = inf->expired;
1802                 inf->num_rrsets++;
1803         }
1804 }
1805
1806 /** callback to delete negative and servfail messages */
1807 static void
1808 negative_del_msg(struct lruhash_entry* e, void* arg)
1809 {
1810         /* entry is locked */
1811         struct del_info* inf = (struct del_info*)arg;
1812         struct reply_info* d = (struct reply_info*)e->data;
1813         /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error
1814          * or NOERROR rcode with ANCOUNT==0: a NODATA answer */
1815         if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) {
1816                 d->ttl = inf->expired;
1817                 inf->num_msgs++;
1818         }
1819 }
1820
1821 /** callback to delete negative key entries */
1822 static void
1823 negative_del_kcache(struct lruhash_entry* e, void* arg)
1824 {
1825         /* entry is locked */
1826         struct del_info* inf = (struct del_info*)arg;
1827         struct key_entry_data* d = (struct key_entry_data*)e->data;
1828         /* could be bad because of lookup failure on the DS, DNSKEY, which
1829          * was nxdomain or servfail, and thus a result of negative lookups */
1830         if(d->isbad) {
1831                 d->ttl = inf->expired;
1832                 inf->num_keys++;
1833         }
1834 }
1835
1836 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */
1837 static void
1838 do_flush_negative(SSL* ssl, struct worker* worker)
1839 {
1840         struct del_info inf;
1841         /* what we do is to set them all expired */
1842         inf.worker = worker;
1843         inf.expired = *worker->env.now;
1844         inf.expired -= 3; /* handle 3 seconds skew between threads */
1845         inf.num_rrsets = 0;
1846         inf.num_msgs = 0;
1847         inf.num_keys = 0;
1848         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1849                 &negative_del_rrset, &inf);
1850
1851         slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
1852
1853         /* and validator cache */
1854         if(worker->env.key_cache) {
1855                 slabhash_traverse(worker->env.key_cache->slab, 1,
1856                         &negative_del_kcache, &inf);
1857         }
1858
1859         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1860                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1861                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1862 }
1863
1864 /** remove name rrset from cache */
1865 static void
1866 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1867 {
1868         uint8_t* nm;
1869         int nmlabs;
1870         size_t nmlen;
1871         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1872                 return;
1873         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1874         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1875         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1876         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1877         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1878         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1879         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1880         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1881         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1882         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1883
1884         free(nm);
1885         send_ok(ssl);
1886 }
1887
1888 /** printout a delegation point info */
1889 static int
1890 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1891         struct delegpt* dp)
1892 {
1893         char buf[257];
1894         struct delegpt_ns* ns;
1895         struct delegpt_addr* a;
1896         int f = 0;
1897         if(str) { /* print header for forward, stub */
1898                 char* c = sldns_wire2str_class(dclass);
1899                 dname_str(nm, buf);
1900                 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) {
1901                         free(c);
1902                         return 0;
1903                 }
1904                 free(c);
1905         }
1906         for(ns = dp->nslist; ns; ns = ns->next) {
1907                 dname_str(ns->name, buf);
1908                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1909                         return 0;
1910                 f = 1;
1911         }
1912         for(a = dp->target_list; a; a = a->next_target) {
1913                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1914                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1915                         return 0;
1916                 f = 1;
1917         }
1918         return ssl_printf(ssl, "\n");
1919 }
1920
1921
1922 /** print root forwards */
1923 static int
1924 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1925 {
1926         struct delegpt* dp;
1927         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1928         if(!dp)
1929                 return ssl_printf(ssl, "off (using root hints)\n");
1930         /* if dp is returned it must be the root */
1931         log_assert(query_dname_compare(dp->name, root)==0);
1932         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1933 }
1934
1935 /** parse args into delegpt */
1936 static struct delegpt*
1937 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1938 {
1939         /* parse args and add in */
1940         char* p = args;
1941         char* todo;
1942         struct delegpt* dp = delegpt_create_mlc(nm);
1943         struct sockaddr_storage addr;
1944         socklen_t addrlen;
1945         char* auth_name;
1946         if(!dp) {
1947                 (void)ssl_printf(ssl, "error out of memory\n");
1948                 return NULL;
1949         }
1950         while(p) {
1951                 todo = p;
1952                 p = strchr(p, ' '); /* find next spot, if any */
1953                 if(p) {
1954                         *p++ = 0;       /* end this spot */
1955                         p = skipwhite(p); /* position at next spot */
1956                 }
1957                 /* parse address */
1958                 if(!authextstrtoaddr(todo, &addr, &addrlen, &auth_name)) {
1959                         if(allow_names) {
1960                                 uint8_t* n = NULL;
1961                                 size_t ln;
1962                                 int lb;
1963                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1964                                         (void)ssl_printf(ssl, "error cannot "
1965                                                 "parse IP address or name "
1966                                                 "'%s'\n", todo);
1967                                         delegpt_free_mlc(dp);
1968                                         return NULL;
1969                                 }
1970                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1971                                         (void)ssl_printf(ssl, "error out of memory\n");
1972                                         free(n);
1973                                         delegpt_free_mlc(dp);
1974                                         return NULL;
1975                                 }
1976                                 free(n);
1977
1978                         } else {
1979                                 (void)ssl_printf(ssl, "error cannot parse"
1980                                         " IP address '%s'\n", todo);
1981                                 delegpt_free_mlc(dp);
1982                                 return NULL;
1983                         }
1984                 } else {
1985                         /* add address */
1986                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0,
1987                                 auth_name)) {
1988                                 (void)ssl_printf(ssl, "error out of memory\n");
1989                                 delegpt_free_mlc(dp);
1990                                 return NULL;
1991                         }
1992                 }
1993         }
1994         dp->has_parent_side_NS = 1;
1995         return dp;
1996 }
1997
1998 /** do the status command */
1999 static void
2000 do_forward(SSL* ssl, struct worker* worker, char* args)
2001 {
2002         struct iter_forwards* fwd = worker->env.fwds;
2003         uint8_t* root = (uint8_t*)"\000";
2004         if(!fwd) {
2005                 (void)ssl_printf(ssl, "error: structure not allocated\n");
2006                 return;
2007         }
2008         if(args == NULL || args[0] == 0) {
2009                 (void)print_root_fwds(ssl, fwd, root);
2010                 return;
2011         }
2012         /* set root forwards for this thread. since we are in remote control
2013          * the actual mesh is not running, so we can freely edit it. */
2014         /* delete all the existing queries first */
2015         mesh_delete_all(worker->env.mesh);
2016         if(strcmp(args, "off") == 0) {
2017                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
2018         } else {
2019                 struct delegpt* dp;
2020                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
2021                         return;
2022                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
2023                         (void)ssl_printf(ssl, "error out of memory\n");
2024                         return;
2025                 }
2026         }
2027         send_ok(ssl);
2028 }
2029
2030 static int
2031 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
2032         int* insecure, int* prime)
2033 {
2034         char* zonename;
2035         char* rest;
2036         size_t nmlen;
2037         int nmlabs;
2038         /* parse all -x args */
2039         while(args[0] == '+') {
2040                 if(!find_arg2(ssl, args, &rest))
2041                         return 0;
2042                 while(*(++args) != 0) {
2043                         if(*args == 'i' && insecure)
2044                                 *insecure = 1;
2045                         else if(*args == 'p' && prime)
2046                                 *prime = 1;
2047                         else {
2048                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
2049                                 return 0;
2050                         }
2051                 }
2052                 args = rest;
2053         }
2054         /* parse name */
2055         if(dp) {
2056                 if(!find_arg2(ssl, args, &rest))
2057                         return 0;
2058                 zonename = args;
2059                 args = rest;
2060         } else  zonename = args;
2061         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
2062                 return 0;
2063
2064         /* parse dp */
2065         if(dp) {
2066                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
2067                         free(*nm);
2068                         return 0;
2069                 }
2070         }
2071         return 1;
2072 }
2073
2074 /** do the forward_add command */
2075 static void
2076 do_forward_add(SSL* ssl, struct worker* worker, char* args)
2077 {
2078         struct iter_forwards* fwd = worker->env.fwds;
2079         int insecure = 0;
2080         uint8_t* nm = NULL;
2081         struct delegpt* dp = NULL;
2082         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
2083                 return;
2084         if(insecure && worker->env.anchors) {
2085                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2086                         nm)) {
2087                         (void)ssl_printf(ssl, "error out of memory\n");
2088                         delegpt_free_mlc(dp);
2089                         free(nm);
2090                         return;
2091                 }
2092         }
2093         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
2094                 (void)ssl_printf(ssl, "error out of memory\n");
2095                 free(nm);
2096                 return;
2097         }
2098         free(nm);
2099         send_ok(ssl);
2100 }
2101
2102 /** do the forward_remove command */
2103 static void
2104 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
2105 {
2106         struct iter_forwards* fwd = worker->env.fwds;
2107         int insecure = 0;
2108         uint8_t* nm = NULL;
2109         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
2110                 return;
2111         if(insecure && worker->env.anchors)
2112                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2113                         nm);
2114         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
2115         free(nm);
2116         send_ok(ssl);
2117 }
2118
2119 /** do the stub_add command */
2120 static void
2121 do_stub_add(SSL* ssl, struct worker* worker, char* args)
2122 {
2123         struct iter_forwards* fwd = worker->env.fwds;
2124         int insecure = 0, prime = 0;
2125         uint8_t* nm = NULL;
2126         struct delegpt* dp = NULL;
2127         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
2128                 return;
2129         if(insecure && worker->env.anchors) {
2130                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2131                         nm)) {
2132                         (void)ssl_printf(ssl, "error out of memory\n");
2133                         delegpt_free_mlc(dp);
2134                         free(nm);
2135                         return;
2136                 }
2137         }
2138         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
2139                 if(insecure && worker->env.anchors)
2140                         anchors_delete_insecure(worker->env.anchors,
2141                                 LDNS_RR_CLASS_IN, nm);
2142                 (void)ssl_printf(ssl, "error out of memory\n");
2143                 delegpt_free_mlc(dp);
2144                 free(nm);
2145                 return;
2146         }
2147         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
2148                 (void)ssl_printf(ssl, "error out of memory\n");
2149                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
2150                 if(insecure && worker->env.anchors)
2151                         anchors_delete_insecure(worker->env.anchors,
2152                                 LDNS_RR_CLASS_IN, nm);
2153                 free(nm);
2154                 return;
2155         }
2156         free(nm);
2157         send_ok(ssl);
2158 }
2159
2160 /** do the stub_remove command */
2161 static void
2162 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
2163 {
2164         struct iter_forwards* fwd = worker->env.fwds;
2165         int insecure = 0;
2166         uint8_t* nm = NULL;
2167         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
2168                 return;
2169         if(insecure && worker->env.anchors)
2170                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
2171                         nm);
2172         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
2173         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
2174         free(nm);
2175         send_ok(ssl);
2176 }
2177
2178 /** do the insecure_add command */
2179 static void
2180 do_insecure_add(SSL* ssl, struct worker* worker, char* arg)
2181 {
2182         size_t nmlen;
2183         int nmlabs;
2184         uint8_t* nm = NULL;
2185         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
2186                 return;
2187         if(worker->env.anchors) {
2188                 if(!anchors_add_insecure(worker->env.anchors,
2189                         LDNS_RR_CLASS_IN, nm)) {
2190                         (void)ssl_printf(ssl, "error out of memory\n");
2191                         free(nm);
2192                         return;
2193                 }
2194         }
2195         free(nm);
2196         send_ok(ssl);
2197 }
2198
2199 /** do the insecure_remove command */
2200 static void
2201 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg)
2202 {
2203         size_t nmlen;
2204         int nmlabs;
2205         uint8_t* nm = NULL;
2206         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
2207                 return;
2208         if(worker->env.anchors)
2209                 anchors_delete_insecure(worker->env.anchors,
2210                         LDNS_RR_CLASS_IN, nm);
2211         free(nm);
2212         send_ok(ssl);
2213 }
2214
2215 static void
2216 do_insecure_list(SSL* ssl, struct worker* worker)
2217 {
2218         char buf[257];
2219         struct trust_anchor* a;
2220         if(worker->env.anchors) {
2221                 RBTREE_FOR(a, struct trust_anchor*, worker->env.anchors->tree) {
2222                         if(a->numDS == 0 && a->numDNSKEY == 0) {
2223                                 dname_str(a->name, buf);
2224                                 ssl_printf(ssl, "%s\n", buf);
2225                         }
2226                 }
2227         }
2228 }
2229
2230 /** do the status command */
2231 static void
2232 do_status(SSL* ssl, struct worker* worker)
2233 {
2234         int i;
2235         time_t uptime;
2236         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
2237                 return;
2238         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
2239                 return;
2240         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
2241                 return;
2242         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
2243                 return;
2244         for(i=0; i<worker->daemon->mods.num; i++) {
2245                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
2246                         return;
2247         }
2248         if(!ssl_printf(ssl, " ]\n"))
2249                 return;
2250         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
2251         if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
2252                 return;
2253         if(!ssl_printf(ssl, "options:%s%s\n" ,
2254                 (worker->daemon->reuseport?" reuseport":""),
2255                 (worker->daemon->rc->accept_list?" control(ssl)":"")))
2256                 return;
2257         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
2258                 (int)getpid()))
2259                 return;
2260 }
2261
2262 /** get age for the mesh state */
2263 static void
2264 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
2265         struct module_env* env)
2266 {
2267         if(m->reply_list) {
2268                 struct timeval d;
2269                 struct mesh_reply* r = m->reply_list;
2270                 /* last reply is the oldest */
2271                 while(r && r->next)
2272                         r = r->next;
2273                 timeval_subtract(&d, env->now_tv, &r->start_time);
2274                 snprintf(buf, len, ARG_LL "d.%6.6d",
2275                         (long long)d.tv_sec, (int)d.tv_usec);
2276         } else {
2277                 snprintf(buf, len, "-");
2278         }
2279 }
2280
2281 /** get status of a mesh state */
2282 static void
2283 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
2284         char* buf, size_t len)
2285 {
2286         enum module_ext_state s = m->s.ext_state[m->s.curmod];
2287         const char *modname = mesh->mods.mod[m->s.curmod]->name;
2288         size_t l;
2289         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
2290                 m->s.minfo[m->s.curmod]) {
2291                 /* break into iterator to find out who its waiting for */
2292                 struct iter_qstate* qstate = (struct iter_qstate*)
2293                         m->s.minfo[m->s.curmod];
2294                 struct outbound_list* ol = &qstate->outlist;
2295                 struct outbound_entry* e;
2296                 snprintf(buf, len, "%s wait for", modname);
2297                 l = strlen(buf);
2298                 buf += l; len -= l;
2299                 if(ol->first == NULL)
2300                         snprintf(buf, len, " (empty_list)");
2301                 for(e = ol->first; e; e = e->next) {
2302                         snprintf(buf, len, " ");
2303                         l = strlen(buf);
2304                         buf += l; len -= l;
2305                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
2306                                 buf, len);
2307                         l = strlen(buf);
2308                         buf += l; len -= l;
2309                 }
2310         } else if(s == module_wait_subquery) {
2311                 /* look in subs from mesh state to see what */
2312                 char nm[257];
2313                 struct mesh_state_ref* sub;
2314                 snprintf(buf, len, "%s wants", modname);
2315                 l = strlen(buf);
2316                 buf += l; len -= l;
2317                 if(m->sub_set.count == 0)
2318                         snprintf(buf, len, " (empty_list)");
2319                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
2320                         char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype);
2321                         char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
2322                         dname_str(sub->s->s.qinfo.qname, nm);
2323                         snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"),
2324                                 (c?c:"CLASS??"), nm);
2325                         l = strlen(buf);
2326                         buf += l; len -= l;
2327                         free(t);
2328                         free(c);
2329                 }
2330         } else {
2331                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
2332         }
2333 }
2334
2335 /** do the dump_requestlist command */
2336 static void
2337 do_dump_requestlist(SSL* ssl, struct worker* worker)
2338 {
2339         struct mesh_area* mesh;
2340         struct mesh_state* m;
2341         int num = 0;
2342         char buf[257];
2343         char timebuf[32];
2344         char statbuf[10240];
2345         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
2346                 return;
2347         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
2348                 return;
2349         /* show worker mesh contents */
2350         mesh = worker->env.mesh;
2351         if(!mesh) return;
2352         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
2353                 char* t = sldns_wire2str_type(m->s.qinfo.qtype);
2354                 char* c = sldns_wire2str_class(m->s.qinfo.qclass);
2355                 dname_str(m->s.qinfo.qname, buf);
2356                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
2357                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
2358                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
2359                         num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
2360                         statbuf)) {
2361                         free(t);
2362                         free(c);
2363                         return;
2364                 }
2365                 num++;
2366                 free(t);
2367                 free(c);
2368         }
2369 }
2370
2371 /** structure for argument data for dump infra host */
2372 struct infra_arg {
2373         /** the infra cache */
2374         struct infra_cache* infra;
2375         /** the SSL connection */
2376         SSL* ssl;
2377         /** the time now */
2378         time_t now;
2379         /** ssl failure? stop writing and skip the rest.  If the tcp
2380          * connection is broken, and writes fail, we then stop writing. */
2381         int ssl_failed;
2382 };
2383
2384 /** callback for every host element in the infra cache */
2385 static void
2386 dump_infra_host(struct lruhash_entry* e, void* arg)
2387 {
2388         struct infra_arg* a = (struct infra_arg*)arg;
2389         struct infra_key* k = (struct infra_key*)e->key;
2390         struct infra_data* d = (struct infra_data*)e->data;
2391         char ip_str[1024];
2392         char name[257];
2393         int port;
2394         if(a->ssl_failed)
2395                 return;
2396         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
2397         dname_str(k->zonename, name);
2398         port = (int)ntohs(((struct sockaddr_in*)&k->addr)->sin_port);
2399         if(port != UNBOUND_DNS_PORT) {
2400                 snprintf(ip_str+strlen(ip_str), sizeof(ip_str)-strlen(ip_str),
2401                         "@%d", port);
2402         }
2403         /* skip expired stuff (only backed off) */
2404         if(d->ttl < a->now) {
2405                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
2406                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
2407                                 name, d->rtt.rto))  {
2408                                 a->ssl_failed = 1;
2409                                 return;
2410                         }
2411                 }
2412                 return;
2413         }
2414         if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d "
2415                 "tA %d tAAAA %d tother %d "
2416                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
2417                 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now),
2418                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
2419                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
2420                 (int)d->edns_lame_known, (int)d->edns_version,
2421                 (int)(a->now<d->probedelay?(d->probedelay - a->now):0),
2422                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
2423                 (int)d->lame_other)) {
2424                 a->ssl_failed = 1;
2425                 return;
2426         }
2427 }
2428
2429 /** do the dump_infra command */
2430 static void
2431 do_dump_infra(SSL* ssl, struct worker* worker)
2432 {
2433         struct infra_arg arg;
2434         arg.infra = worker->env.infra_cache;
2435         arg.ssl = ssl;
2436         arg.now = *worker->env.now;
2437         arg.ssl_failed = 0;
2438         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
2439 }
2440
2441 /** do the log_reopen command */
2442 static void
2443 do_log_reopen(SSL* ssl, struct worker* worker)
2444 {
2445         struct config_file* cfg = worker->env.cfg;
2446         send_ok(ssl);
2447         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
2448 }
2449
2450 /** do the set_option command */
2451 static void
2452 do_set_option(SSL* ssl, struct worker* worker, char* arg)
2453 {
2454         char* arg2;
2455         if(!find_arg2(ssl, arg, &arg2))
2456                 return;
2457         if(!config_set_option(worker->env.cfg, arg, arg2)) {
2458                 (void)ssl_printf(ssl, "error setting option\n");
2459                 return;
2460         }
2461         /* effectuate some arguments */
2462         if(strcmp(arg, "val-override-date:") == 0) {
2463                 int m = modstack_find(&worker->env.mesh->mods, "validator");
2464                 struct val_env* val_env = NULL;
2465                 if(m != -1) val_env = (struct val_env*)worker->env.modinfo[m];
2466                 if(val_env)
2467                         val_env->date_override = worker->env.cfg->val_date_override;
2468         }
2469         send_ok(ssl);
2470 }
2471
2472 /* routine to printout option values over SSL */
2473 void remote_get_opt_ssl(char* line, void* arg)
2474 {
2475         SSL* ssl = (SSL*)arg;
2476         (void)ssl_printf(ssl, "%s\n", line);
2477 }
2478
2479 /** do the get_option command */
2480 static void
2481 do_get_option(SSL* ssl, struct worker* worker, char* arg)
2482 {
2483         int r;
2484         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
2485         if(!r) {
2486                 (void)ssl_printf(ssl, "error unknown option\n");
2487                 return;
2488         }
2489 }
2490
2491 /** do the list_forwards command */
2492 static void
2493 do_list_forwards(SSL* ssl, struct worker* worker)
2494 {
2495         /* since its a per-worker structure no locks needed */
2496         struct iter_forwards* fwds = worker->env.fwds;
2497         struct iter_forward_zone* z;
2498         struct trust_anchor* a;
2499         int insecure;
2500         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
2501                 if(!z->dp) continue; /* skip empty marker for stub */
2502
2503                 /* see if it is insecure */
2504                 insecure = 0;
2505                 if(worker->env.anchors &&
2506                         (a=anchor_find(worker->env.anchors, z->name,
2507                         z->namelabs, z->namelen,  z->dclass))) {
2508                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2509                                 insecure = 1;
2510                         lock_basic_unlock(&a->lock);
2511                 }
2512
2513                 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
2514                         z->name, z->dclass, z->dp))
2515                         return;
2516         }
2517 }
2518
2519 /** do the list_stubs command */
2520 static void
2521 do_list_stubs(SSL* ssl, struct worker* worker)
2522 {
2523         struct iter_hints_stub* z;
2524         struct trust_anchor* a;
2525         int insecure;
2526         char str[32];
2527         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
2528
2529                 /* see if it is insecure */
2530                 insecure = 0;
2531                 if(worker->env.anchors &&
2532                         (a=anchor_find(worker->env.anchors, z->node.name,
2533                         z->node.labs, z->node.len,  z->node.dclass))) {
2534                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2535                                 insecure = 1;
2536                         lock_basic_unlock(&a->lock);
2537                 }
2538
2539                 snprintf(str, sizeof(str), "stub %sprime%s",
2540                         (z->noprime?"no":""), (insecure?" +i":""));
2541                 if(!ssl_print_name_dp(ssl, str, z->node.name,
2542                         z->node.dclass, z->dp))
2543                         return;
2544         }
2545 }
2546
2547 /** do the list_auth_zones command */
2548 static void
2549 do_list_auth_zones(SSL* ssl, struct auth_zones* az)
2550 {
2551         struct auth_zone* z;
2552         char buf[257], buf2[256];
2553         lock_rw_rdlock(&az->lock);
2554         RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
2555                 lock_rw_rdlock(&z->lock);
2556                 dname_str(z->name, buf);
2557                 if(z->zone_expired)
2558                         snprintf(buf2, sizeof(buf2), "expired");
2559                 else {
2560                         uint32_t serial = 0;
2561                         if(auth_zone_get_serial(z, &serial))
2562                                 snprintf(buf2, sizeof(buf2), "serial %u",
2563                                         (unsigned)serial);
2564                         else    snprintf(buf2, sizeof(buf2), "no serial");
2565                 }
2566                 if(!ssl_printf(ssl, "%s\t%s\n", buf, buf2)) {
2567                         /* failure to print */
2568                         lock_rw_unlock(&z->lock);
2569                         lock_rw_unlock(&az->lock);
2570                         return;
2571                 }
2572                 lock_rw_unlock(&z->lock);
2573         }
2574         lock_rw_unlock(&az->lock);
2575 }
2576
2577 /** do the list_local_zones command */
2578 static void
2579 do_list_local_zones(SSL* ssl, struct local_zones* zones)
2580 {
2581         struct local_zone* z;
2582         char buf[257];
2583         lock_rw_rdlock(&zones->lock);
2584         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2585                 lock_rw_rdlock(&z->lock);
2586                 dname_str(z->name, buf);
2587                 if(!ssl_printf(ssl, "%s %s\n", buf,
2588                         local_zone_type2str(z->type))) {
2589                         /* failure to print */
2590                         lock_rw_unlock(&z->lock);
2591                         lock_rw_unlock(&zones->lock);
2592                         return;
2593                 }
2594                 lock_rw_unlock(&z->lock);
2595         }
2596         lock_rw_unlock(&zones->lock);
2597 }
2598
2599 /** do the list_local_data command */
2600 static void
2601 do_list_local_data(SSL* ssl, struct worker* worker, struct local_zones* zones)
2602 {
2603         struct local_zone* z;
2604         struct local_data* d;
2605         struct local_rrset* p;
2606         char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer);
2607         size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer);
2608         lock_rw_rdlock(&zones->lock);
2609         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2610                 lock_rw_rdlock(&z->lock);
2611                 RBTREE_FOR(d, struct local_data*, &z->data) {
2612                         for(p = d->rrsets; p; p = p->next) {
2613                                 struct packed_rrset_data* d =
2614                                         (struct packed_rrset_data*)p->rrset->entry.data;
2615                                 size_t i;
2616                                 for(i=0; i<d->count + d->rrsig_count; i++) {
2617                                         if(!packed_rr_to_string(p->rrset, i,
2618                                                 0, s, slen)) {
2619                                                 if(!ssl_printf(ssl, "BADRR\n")) {
2620                                                         lock_rw_unlock(&z->lock);
2621                                                         lock_rw_unlock(&zones->lock);
2622                                                         return;
2623                                                 }
2624                                         }
2625                                         if(!ssl_printf(ssl, "%s\n", s)) {
2626                                                 lock_rw_unlock(&z->lock);
2627                                                 lock_rw_unlock(&zones->lock);
2628                                                 return;
2629                                         }
2630                                 }
2631                         }
2632                 }
2633                 lock_rw_unlock(&z->lock);
2634         }
2635         lock_rw_unlock(&zones->lock);
2636 }
2637
2638 /** do the view_list_local_zones command */
2639 static void
2640 do_view_list_local_zones(SSL* ssl, struct worker* worker, char* arg)
2641 {
2642         struct view* v = views_find_view(worker->daemon->views,
2643                 arg, 0 /* get read lock*/);
2644         if(!v) {
2645                 ssl_printf(ssl,"no view with name: %s\n", arg);
2646                 return;
2647         }
2648         if(v->local_zones) {
2649                 do_list_local_zones(ssl, v->local_zones);
2650         }
2651         lock_rw_unlock(&v->lock);
2652 }
2653
2654 /** do the view_list_local_data command */
2655 static void
2656 do_view_list_local_data(SSL* ssl, struct worker* worker, char* arg)
2657 {
2658         struct view* v = views_find_view(worker->daemon->views,
2659                 arg, 0 /* get read lock*/);
2660         if(!v) {
2661                 ssl_printf(ssl,"no view with name: %s\n", arg);
2662                 return;
2663         }
2664         if(v->local_zones) {
2665                 do_list_local_data(ssl, worker, v->local_zones);
2666         }
2667         lock_rw_unlock(&v->lock);
2668 }
2669
2670 /** struct for user arg ratelimit list */
2671 struct ratelimit_list_arg {
2672         /** the infra cache */
2673         struct infra_cache* infra;
2674         /** the SSL to print to */
2675         SSL* ssl;
2676         /** all or only ratelimited */
2677         int all;
2678         /** current time */
2679         time_t now;
2680 };
2681
2682 #define ip_ratelimit_list_arg ratelimit_list_arg
2683
2684 /** list items in the ratelimit table */
2685 static void
2686 rate_list(struct lruhash_entry* e, void* arg)
2687 {
2688         struct ratelimit_list_arg* a = (struct ratelimit_list_arg*)arg;
2689         struct rate_key* k = (struct rate_key*)e->key;
2690         struct rate_data* d = (struct rate_data*)e->data;
2691         char buf[257];
2692         int lim = infra_find_ratelimit(a->infra, k->name, k->namelen);
2693         int max = infra_rate_max(d, a->now);
2694         if(a->all == 0) {
2695                 if(max < lim)
2696                         return;
2697         }
2698         dname_str(k->name, buf);
2699         ssl_printf(a->ssl, "%s %d limit %d\n", buf, max, lim);
2700 }
2701
2702 /** list items in the ip_ratelimit table */
2703 static void
2704 ip_rate_list(struct lruhash_entry* e, void* arg)
2705 {
2706         char ip[128];
2707         struct ip_ratelimit_list_arg* a = (struct ip_ratelimit_list_arg*)arg;
2708         struct ip_rate_key* k = (struct ip_rate_key*)e->key;
2709         struct ip_rate_data* d = (struct ip_rate_data*)e->data;
2710         int lim = infra_ip_ratelimit;
2711         int max = infra_rate_max(d, a->now);
2712         if(a->all == 0) {
2713                 if(max < lim)
2714                         return;
2715         }
2716         addr_to_str(&k->addr, k->addrlen, ip, sizeof(ip));
2717         ssl_printf(a->ssl, "%s %d limit %d\n", ip, max, lim);
2718 }
2719
2720 /** do the ratelimit_list command */
2721 static void
2722 do_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2723 {
2724         struct ratelimit_list_arg a;
2725         a.all = 0;
2726         a.infra = worker->env.infra_cache;
2727         a.now = *worker->env.now;
2728         a.ssl = ssl;
2729         arg = skipwhite(arg);
2730         if(strcmp(arg, "+a") == 0)
2731                 a.all = 1;
2732         if(a.infra->domain_rates==NULL ||
2733                 (a.all == 0 && infra_dp_ratelimit == 0))
2734                 return;
2735         slabhash_traverse(a.infra->domain_rates, 0, rate_list, &a);
2736 }
2737
2738 /** do the ip_ratelimit_list command */
2739 static void
2740 do_ip_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2741 {
2742         struct ip_ratelimit_list_arg a;
2743         a.all = 0;
2744         a.infra = worker->env.infra_cache;
2745         a.now = *worker->env.now;
2746         a.ssl = ssl;
2747         arg = skipwhite(arg);
2748         if(strcmp(arg, "+a") == 0)
2749                 a.all = 1;
2750         if(a.infra->client_ip_rates==NULL ||
2751                 (a.all == 0 && infra_ip_ratelimit == 0))
2752                 return;
2753         slabhash_traverse(a.infra->client_ip_rates, 0, ip_rate_list, &a);
2754 }
2755
2756 /** tell other processes to execute the command */
2757 static void
2758 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
2759 {
2760         int i;
2761         if(!cmd || !ssl)
2762                 return;
2763         /* skip i=0 which is me */
2764         for(i=1; i<rc->worker->daemon->num; i++) {
2765                 worker_send_cmd(rc->worker->daemon->workers[i],
2766                         worker_cmd_remote);
2767                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
2768                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
2769                         ssl_printf(ssl, "error could not distribute cmd\n");
2770                         return;
2771                 }
2772         }
2773 }
2774
2775 /** check for name with end-of-string, space or tab after it */
2776 static int
2777 cmdcmp(char* p, const char* cmd, size_t len)
2778 {
2779         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
2780 }
2781
2782 /** execute a remote control command */
2783 static void
2784 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
2785         struct worker* worker)
2786 {
2787         char* p = skipwhite(cmd);
2788         /* compare command */
2789         if(cmdcmp(p, "stop", 4)) {
2790                 do_stop(ssl, rc);
2791                 return;
2792         } else if(cmdcmp(p, "reload", 6)) {
2793                 do_reload(ssl, rc);
2794                 return;
2795         } else if(cmdcmp(p, "stats_noreset", 13)) {
2796                 do_stats(ssl, rc, 0);
2797                 return;
2798         } else if(cmdcmp(p, "stats", 5)) {
2799                 do_stats(ssl, rc, 1);
2800                 return;
2801         } else if(cmdcmp(p, "status", 6)) {
2802                 do_status(ssl, worker);
2803                 return;
2804         } else if(cmdcmp(p, "dump_cache", 10)) {
2805                 (void)dump_cache(ssl, worker);
2806                 return;
2807         } else if(cmdcmp(p, "load_cache", 10)) {
2808                 if(load_cache(ssl, worker)) send_ok(ssl);
2809                 return;
2810         } else if(cmdcmp(p, "list_forwards", 13)) {
2811                 do_list_forwards(ssl, worker);
2812                 return;
2813         } else if(cmdcmp(p, "list_stubs", 10)) {
2814                 do_list_stubs(ssl, worker);
2815                 return;
2816         } else if(cmdcmp(p, "list_insecure", 13)) {
2817                 do_insecure_list(ssl, worker);
2818                 return;
2819         } else if(cmdcmp(p, "list_local_zones", 16)) {
2820                 do_list_local_zones(ssl, worker->daemon->local_zones);
2821                 return;
2822         } else if(cmdcmp(p, "list_local_data", 15)) {
2823                 do_list_local_data(ssl, worker, worker->daemon->local_zones);
2824                 return;
2825         } else if(cmdcmp(p, "view_list_local_zones", 21)) {
2826                 do_view_list_local_zones(ssl, worker, skipwhite(p+21));
2827                 return;
2828         } else if(cmdcmp(p, "view_list_local_data", 20)) {
2829                 do_view_list_local_data(ssl, worker, skipwhite(p+20));
2830                 return;
2831         } else if(cmdcmp(p, "ratelimit_list", 14)) {
2832                 do_ratelimit_list(ssl, worker, p+14);
2833                 return;
2834         } else if(cmdcmp(p, "ip_ratelimit_list", 17)) {
2835                 do_ip_ratelimit_list(ssl, worker, p+17);
2836                 return;
2837         } else if(cmdcmp(p, "list_auth_zones", 15)) {
2838                 do_list_auth_zones(ssl, worker->env.auth_zones);
2839                 return;
2840         } else if(cmdcmp(p, "stub_add", 8)) {
2841                 /* must always distribute this cmd */
2842                 if(rc) distribute_cmd(rc, ssl, cmd);
2843                 do_stub_add(ssl, worker, skipwhite(p+8));
2844                 return;
2845         } else if(cmdcmp(p, "stub_remove", 11)) {
2846                 /* must always distribute this cmd */
2847                 if(rc) distribute_cmd(rc, ssl, cmd);
2848                 do_stub_remove(ssl, worker, skipwhite(p+11));
2849                 return;
2850         } else if(cmdcmp(p, "forward_add", 11)) {
2851                 /* must always distribute this cmd */
2852                 if(rc) distribute_cmd(rc, ssl, cmd);
2853                 do_forward_add(ssl, worker, skipwhite(p+11));
2854                 return;
2855         } else if(cmdcmp(p, "forward_remove", 14)) {
2856                 /* must always distribute this cmd */
2857                 if(rc) distribute_cmd(rc, ssl, cmd);
2858                 do_forward_remove(ssl, worker, skipwhite(p+14));
2859                 return;
2860         } else if(cmdcmp(p, "insecure_add", 12)) {
2861                 /* must always distribute this cmd */
2862                 if(rc) distribute_cmd(rc, ssl, cmd);
2863                 do_insecure_add(ssl, worker, skipwhite(p+12));
2864                 return;
2865         } else if(cmdcmp(p, "insecure_remove", 15)) {
2866                 /* must always distribute this cmd */
2867                 if(rc) distribute_cmd(rc, ssl, cmd);
2868                 do_insecure_remove(ssl, worker, skipwhite(p+15));
2869                 return;
2870         } else if(cmdcmp(p, "forward", 7)) {
2871                 /* must always distribute this cmd */
2872                 if(rc) distribute_cmd(rc, ssl, cmd);
2873                 do_forward(ssl, worker, skipwhite(p+7));
2874                 return;
2875         } else if(cmdcmp(p, "flush_stats", 11)) {
2876                 /* must always distribute this cmd */
2877                 if(rc) distribute_cmd(rc, ssl, cmd);
2878                 do_flush_stats(ssl, worker);
2879                 return;
2880         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2881                 /* must always distribute this cmd */
2882                 if(rc) distribute_cmd(rc, ssl, cmd);
2883                 do_flush_requestlist(ssl, worker);
2884                 return;
2885         } else if(cmdcmp(p, "lookup", 6)) {
2886                 do_lookup(ssl, worker, skipwhite(p+6));
2887                 return;
2888         }
2889
2890 #ifdef THREADS_DISABLED
2891         /* other processes must execute the command as well */
2892         /* commands that should not be distributed, returned above. */
2893         if(rc) { /* only if this thread is the master (rc) thread */
2894                 /* done before the code below, which may split the string */
2895                 distribute_cmd(rc, ssl, cmd);
2896         }
2897 #endif
2898         if(cmdcmp(p, "verbosity", 9)) {
2899                 do_verbosity(ssl, skipwhite(p+9));
2900         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2901                 do_zone_remove(ssl, worker->daemon->local_zones, skipwhite(p+17));
2902         } else if(cmdcmp(p, "local_zones_remove", 18)) {
2903                 do_zones_remove(ssl, worker->daemon->local_zones);
2904         } else if(cmdcmp(p, "local_zone", 10)) {
2905                 do_zone_add(ssl, worker->daemon->local_zones, skipwhite(p+10));
2906         } else if(cmdcmp(p, "local_zones", 11)) {
2907                 do_zones_add(ssl, worker->daemon->local_zones);
2908         } else if(cmdcmp(p, "local_data_remove", 17)) {
2909                 do_data_remove(ssl, worker->daemon->local_zones, skipwhite(p+17));
2910         } else if(cmdcmp(p, "local_datas_remove", 18)) {
2911                 do_datas_remove(ssl, worker->daemon->local_zones);
2912         } else if(cmdcmp(p, "local_data", 10)) {
2913                 do_data_add(ssl, worker->daemon->local_zones, skipwhite(p+10));
2914         } else if(cmdcmp(p, "local_datas", 11)) {
2915                 do_datas_add(ssl, worker->daemon->local_zones);
2916         } else if(cmdcmp(p, "view_local_zone_remove", 22)) {
2917                 do_view_zone_remove(ssl, worker, skipwhite(p+22));
2918         } else if(cmdcmp(p, "view_local_zone", 15)) {
2919                 do_view_zone_add(ssl, worker, skipwhite(p+15));
2920         } else if(cmdcmp(p, "view_local_data_remove", 22)) {
2921                 do_view_data_remove(ssl, worker, skipwhite(p+22));
2922         } else if(cmdcmp(p, "view_local_data", 15)) {
2923                 do_view_data_add(ssl, worker, skipwhite(p+15));
2924         } else if(cmdcmp(p, "flush_zone", 10)) {
2925                 do_flush_zone(ssl, worker, skipwhite(p+10));
2926         } else if(cmdcmp(p, "flush_type", 10)) {
2927                 do_flush_type(ssl, worker, skipwhite(p+10));
2928         } else if(cmdcmp(p, "flush_infra", 11)) {
2929                 do_flush_infra(ssl, worker, skipwhite(p+11));
2930         } else if(cmdcmp(p, "flush", 5)) {
2931                 do_flush_name(ssl, worker, skipwhite(p+5));
2932         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2933                 do_dump_requestlist(ssl, worker);
2934         } else if(cmdcmp(p, "dump_infra", 10)) {
2935                 do_dump_infra(ssl, worker);
2936         } else if(cmdcmp(p, "log_reopen", 10)) {
2937                 do_log_reopen(ssl, worker);
2938         } else if(cmdcmp(p, "set_option", 10)) {
2939                 do_set_option(ssl, worker, skipwhite(p+10));
2940         } else if(cmdcmp(p, "get_option", 10)) {
2941                 do_get_option(ssl, worker, skipwhite(p+10));
2942         } else if(cmdcmp(p, "flush_bogus", 11)) {
2943                 do_flush_bogus(ssl, worker);
2944         } else if(cmdcmp(p, "flush_negative", 14)) {
2945                 do_flush_negative(ssl, worker);
2946         } else {
2947                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2948         }
2949 }
2950
2951 void
2952 daemon_remote_exec(struct worker* worker)
2953 {
2954         /* read the cmd string */
2955         uint8_t* msg = NULL;
2956         uint32_t len = 0;
2957         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2958                 log_err("daemon_remote_exec: tube_read_msg failed");
2959                 return;
2960         }
2961         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2962         execute_cmd(NULL, NULL, (char*)msg, worker);
2963         free(msg);
2964 }
2965
2966 /** handle remote control request */
2967 static void
2968 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2969 {
2970         int r;
2971         char pre[10];
2972         char magic[7];
2973         char buf[1024];
2974 #ifdef USE_WINSOCK
2975         /* makes it possible to set the socket blocking again. */
2976         /* basically removes it from winsock_event ... */
2977         WSAEventSelect(s->c->fd, NULL, 0);
2978 #endif
2979         fd_set_block(s->c->fd);
2980
2981         /* try to read magic UBCT[version]_space_ string */
2982         ERR_clear_error();
2983         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2984                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2985                         return;
2986                 log_crypto_err("could not SSL_read");
2987                 return;
2988         }
2989         magic[6] = 0;
2990         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2991                 verbose(VERB_QUERY, "control connection has bad magic string");
2992                 /* probably wrong tool connected, ignore it completely */
2993                 return;
2994         }
2995
2996         /* read the command line */
2997         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2998                 return;
2999         }
3000         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
3001         if(strcmp(magic, pre) != 0) {
3002                 verbose(VERB_QUERY, "control connection had bad "
3003                         "version %s, cmd: %s", magic, buf);
3004                 ssl_printf(ssl, "error version mismatch\n");
3005                 return;
3006         }
3007         verbose(VERB_DETAIL, "control cmd: %s", buf);
3008
3009         /* figure out what to do */
3010         execute_cmd(rc, ssl, buf, rc->worker);
3011 }
3012
3013 int remote_control_callback(struct comm_point* c, void* arg, int err,
3014         struct comm_reply* ATTR_UNUSED(rep))
3015 {
3016         struct rc_state* s = (struct rc_state*)arg;
3017         struct daemon_remote* rc = s->rc;
3018         int r;
3019         if(err != NETEVENT_NOERROR) {
3020                 if(err==NETEVENT_TIMEOUT)
3021                         log_err("remote control timed out");
3022                 clean_point(rc, s);
3023                 return 0;
3024         }
3025         /* (continue to) setup the SSL connection */
3026         ERR_clear_error();
3027         r = SSL_do_handshake(s->ssl);
3028         if(r != 1) {
3029                 int r2 = SSL_get_error(s->ssl, r);
3030                 if(r2 == SSL_ERROR_WANT_READ) {
3031                         if(s->shake_state == rc_hs_read) {
3032                                 /* try again later */
3033                                 return 0;
3034                         }
3035                         s->shake_state = rc_hs_read;
3036                         comm_point_listen_for_rw(c, 1, 0);
3037                         return 0;
3038                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
3039                         if(s->shake_state == rc_hs_write) {
3040                                 /* try again later */
3041                                 return 0;
3042                         }
3043                         s->shake_state = rc_hs_write;
3044                         comm_point_listen_for_rw(c, 0, 1);
3045                         return 0;
3046                 } else {
3047                         if(r == 0)
3048                                 log_err("remote control connection closed prematurely");
3049                         log_addr(1, "failed connection from",
3050                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
3051                         log_crypto_err("remote control failed ssl");
3052                         clean_point(rc, s);
3053                         return 0;
3054                 }
3055         }
3056         s->shake_state = rc_none;
3057
3058         /* once handshake has completed, check authentication */
3059         if (!rc->use_cert) {
3060                 verbose(VERB_ALGO, "unauthenticated remote control connection");
3061         } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
3062                 X509* x = SSL_get_peer_certificate(s->ssl);
3063                 if(!x) {
3064                         verbose(VERB_DETAIL, "remote control connection "
3065                                 "provided no client certificate");
3066                         clean_point(rc, s);
3067                         return 0;
3068                 }
3069                 verbose(VERB_ALGO, "remote control connection authenticated");
3070                 X509_free(x);
3071         } else {
3072                 verbose(VERB_DETAIL, "remote control connection failed to "
3073                         "authenticate with client certificate");
3074                 clean_point(rc, s);
3075                 return 0;
3076         }
3077
3078         /* if OK start to actually handle the request */
3079         handle_req(rc, s, s->ssl);
3080
3081         verbose(VERB_ALGO, "remote control operation completed");
3082         clean_point(rc, s);
3083         return 0;
3084 }