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 #ifndef HEADER_DH_H
  50 #include <openssl/dh.h>
  51 #endif
  52
  53 #include <ctype.h>
  54 #include "daemon/remote.h"
  55 #include "daemon/worker.h"
  56 #include "daemon/daemon.h"
  57 #include "daemon/stats.h"
  58 #include "daemon/cachedump.h"
  59 #include "util/log.h"
  60 #include "util/config_file.h"
  61 #include "util/net_help.h"
  62 #include "util/module.h"
  63 #include "services/listen_dnsport.h"
  64 #include "services/cache/rrset.h"
  65 #include "services/cache/infra.h"
  66 #include "services/mesh.h"
  67 #include "services/localzone.h"
  68 #include "util/storage/slabhash.h"
  69 #include "util/fptr_wlist.h"
  70 #include "util/data/dname.h"
  71 #include "validator/validator.h"
  72 #include "validator/val_kcache.h"
  73 #include "validator/val_kentry.h"
  74 #include "validator/val_anchor.h"
  75 #include "iterator/iterator.h"
  76 #include "iterator/iter_fwd.h"
  77 #include "iterator/iter_hints.h"
  78 #include "iterator/iter_delegpt.h"
  79 #include "services/outbound_list.h"
  80 #include "services/outside_network.h"
  81 #include "sldns/str2wire.h"
  82 #include "sldns/parseutil.h"
  83 #include "sldns/wire2str.h"
  84 #include "sldns/sbuffer.h"
  85
  86 #ifdef HAVE_SYS_TYPES_H
  87 #  include <sys/types.h>
  88 #endif
  89 #ifdef HAVE_SYS_STAT_H
  90 #include <sys/stat.h>
  91 #endif
  92 #ifdef HAVE_NETDB_H
  93 #include <netdb.h>
  94 #endif
  95
  96 /* just for portability */
  97 #ifdef SQ
  98 #undef SQ
  99 #endif
 100
 101 /** what to put on statistics lines between var and value, ": " or "=" */
 102 #define SQ "="
 103 /** if true, inhibits a lot of =0 lines from the stats output */
 104 static const int inhibit_zero = 1;
 105
 106 /** subtract timers and the values do not overflow or become negative */
 107 static void
 108 timeval_subtract(struct timeval* d, const struct timeval* end,
 109         const struct timeval* start)
 110 {
 111 #ifndef S_SPLINT_S
 112         time_t end_usec = end->tv_usec;
 113         d->tv_sec = end->tv_sec - start->tv_sec;
 114         if(end_usec < start->tv_usec) {
 115                 end_usec += 1000000;
 116                 d->tv_sec--;
 117         }
 118         d->tv_usec = end_usec - start->tv_usec;
 119 #endif
 120 }
 121
 122 /** divide sum of timers to get average */
 123 static void
 124 timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
 125 {
 126 #ifndef S_SPLINT_S
 127         size_t leftover;
 128         if(d == 0) {
 129                 avg->tv_sec = 0;
 130                 avg->tv_usec = 0;
 131                 return;
 132         }
 133         avg->tv_sec = sum->tv_sec / d;
 134         avg->tv_usec = sum->tv_usec / d;
 135         /* handle fraction from seconds divide */
 136         leftover = sum->tv_sec - avg->tv_sec*d;
 137         avg->tv_usec += (leftover*1000000)/d;
 138 #endif
 139 }
 140
 141 /*
 142  * The following function was generated using the openssl utility, using
 143  * the command : "openssl dhparam -dsaparam -C 1024"
 144  * (some openssl versions reject DH that is 'too small', eg. 512).
 145  */
 146 #ifndef S_SPLINT_S
 147 DH *get_dh1024()
 148 {
 149         static unsigned char dh1024_p[]={
 150                 0xB3,0x67,0x2E,0x3B,0x68,0xC5,0xDA,0x58,0x46,0xD6,0x2B,0xD3,
 151                 0x41,0x78,0x97,0xE4,0xE1,0x61,0x71,0x68,0xE6,0x0F,0x1D,0x78,
 152                 0x05,0xAA,0xF0,0xFF,0x30,0xDF,0xAC,0x49,0x7F,0xE0,0x90,0xFE,
 153                 0xB9,0x56,0x4E,0x3F,0xE2,0x98,0x8A,0xED,0xF5,0x28,0x39,0xEF,
 154                 0x2E,0xA6,0xB7,0x67,0xB2,0x43,0xE4,0x53,0xF8,0xEB,0x2C,0x1F,
 155                 0x06,0x77,0x3A,0x6F,0x62,0x98,0xC1,0x3B,0xF7,0xBA,0x4D,0x93,
 156                 0xF7,0xEB,0x5A,0xAD,0xC5,0x5F,0xF0,0xB7,0x24,0x35,0x81,0xF7,
 157                 0x7F,0x1F,0x24,0xC0,0xDF,0xD3,0xD8,0x40,0x72,0x7E,0xF3,0x19,
 158                 0x2B,0x26,0x27,0xF4,0xB6,0xB3,0xD4,0x7D,0x08,0x23,0xBE,0x68,
 159                 0x2B,0xCA,0xB4,0x46,0xA8,0x9E,0xDD,0x6C,0x3D,0x75,0xA6,0x48,
 160                 0xF7,0x44,0x43,0xBF,0x91,0xC2,0xB4,0x49,
 161                 };
 162         static unsigned char dh1024_g[]={
 163                 0x5F,0x37,0xB5,0x80,0x4D,0xB4,0xC4,0xB2,0x37,0x12,0xD5,0x2F,
 164                 0x56,0x81,0xB0,0xDF,0x3D,0x27,0xA2,0x54,0xE7,0x14,0x65,0x2D,
 165                 0x72,0xA8,0x97,0xE0,0xA9,0x4A,0x09,0x5E,0x89,0xBE,0x34,0x9A,
 166                 0x90,0x98,0xC1,0xE8,0xBB,0x01,0x2B,0xC2,0x74,0x74,0x90,0x59,
 167                 0x0B,0x72,0x62,0x5C,0xFD,0x49,0x63,0x4B,0x38,0x91,0xF1,0x7F,
 168                 0x13,0x25,0xEB,0x52,0x50,0x47,0xA2,0x8C,0x32,0x28,0x42,0xAC,
 169                 0xBD,0x7A,0xCC,0x58,0xBE,0x36,0xDA,0x6A,0x24,0x06,0xC7,0xF1,
 170                 0xDA,0x8D,0x8A,0x3B,0x03,0xFA,0x6F,0x25,0xE5,0x20,0xA7,0xD6,
 171                 0x6F,0x74,0x61,0x53,0x14,0x81,0x29,0x04,0xB5,0x61,0x12,0x53,
 172                 0xA3,0xD6,0x09,0x98,0x0C,0x8F,0x1C,0xBB,0xD7,0x1C,0x2C,0xEE,
 173                 0x56,0x4B,0x74,0x8F,0x4A,0xF8,0xA9,0xD5,
 174                 };
 175         DH *dh;
 176
 177         if ((dh=DH_new()) == NULL) return(NULL);
 178         dh->p=BN_bin2bn(dh1024_p,sizeof(dh1024_p),NULL);
 179         dh->g=BN_bin2bn(dh1024_g,sizeof(dh1024_g),NULL);
 180         if ((dh->p == NULL) || (dh->g == NULL))
 181                 { DH_free(dh); return(NULL); }
 182         dh->length = 160;
 183         return(dh);
 184 }
 185 #endif /* SPLINT */
 186
 187 struct daemon_remote*
 188 daemon_remote_create(struct config_file* cfg)
 189 {
 190         char* s_cert;
 191         char* s_key;
 192         struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 193                 sizeof(*rc));
 194         if(!rc) {
 195                 log_err("out of memory in daemon_remote_create");
 196                 return NULL;
 197         }
 198         rc->max_active = 10;
 199
 200         if(!cfg->remote_control_enable) {
 201                 rc->ctx = NULL;
 202                 return rc;
 203         }
 204         rc->ctx = SSL_CTX_new(SSLv23_server_method());
 205         if(!rc->ctx) {
 206                 log_crypto_err("could not SSL_CTX_new");
 207                 free(rc);
 208                 return NULL;
 209         }
 210         /* no SSLv2, SSLv3 because has defects */
 211         if(!(SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)){
 212                 log_crypto_err("could not set SSL_OP_NO_SSLv2");
 213                 daemon_remote_delete(rc);
 214                 return NULL;
 215         }
 216         if(!(SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3)){
 217                 log_crypto_err("could not set SSL_OP_NO_SSLv3");
 218                 daemon_remote_delete(rc);
 219                 return NULL;
 220         }
 221
 222         if (cfg->remote_control_use_cert == 0) {
 223                 /* No certificates are requested */
 224                 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL")) {
 225                         log_crypto_err("Failed to set aNULL cipher list");
 226                         return NULL;
 227                 }
 228
 229                 /* Since we have no certificates and hence no source of
 230                  * DH params, let's generate and set them
 231                  */
 232                 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh1024())) {
 233                         log_crypto_err("Wanted to set DH param, but failed");
 234                         return NULL;
 235                 }
 236                 return rc;
 237         }
 238         rc->use_cert = 1;
 239         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 240         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 241         if(!s_cert || !s_key) {
 242                 log_err("out of memory in remote control fname");
 243                 goto setup_error;
 244         }
 245         verbose(VERB_ALGO, "setup SSL certificates");
 246         if (!SSL_CTX_use_certificate_file(rc->ctx,s_cert,SSL_FILETYPE_PEM)) {
 247                 log_err("Error for server-cert-file: %s", s_cert);
 248                 log_crypto_err("Error in SSL_CTX use_certificate_file");
 249                 goto setup_error;
 250         }
 251         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 252                 log_err("Error for server-key-file: %s", s_key);
 253                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 254                 goto setup_error;
 255         }
 256         if(!SSL_CTX_check_private_key(rc->ctx)) {
 257                 log_err("Error for server-key-file: %s", s_key);
 258                 log_crypto_err("Error in SSL_CTX check_private_key");
 259                 goto setup_error;
 260         }
 261         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 262                 log_crypto_err("Error setting up SSL_CTX verify locations");
 263         setup_error:
 264                 free(s_cert);
 265                 free(s_key);
 266                 daemon_remote_delete(rc);
 267                 return NULL;
 268         }
 269         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 270         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 271         free(s_cert);
 272         free(s_key);
 273
 274         return rc;
 275 }
 276
 277 void daemon_remote_clear(struct daemon_remote* rc)
 278 {
 279         struct rc_state* p, *np;
 280         if(!rc) return;
 281         /* but do not close the ports */
 282         listen_list_delete(rc->accept_list);
 283         rc->accept_list = NULL;
 284         /* do close these sockets */
 285         p = rc->busy_list;
 286         while(p) {
 287                 np = p->next;
 288                 if(p->ssl)
 289                         SSL_free(p->ssl);
 290                 comm_point_delete(p->c);
 291                 free(p);
 292                 p = np;
 293         }
 294         rc->busy_list = NULL;
 295         rc->active = 0;
 296         rc->worker = NULL;
 297 }
 298
 299 void daemon_remote_delete(struct daemon_remote* rc)
 300 {
 301         if(!rc) return;
 302         daemon_remote_clear(rc);
 303         if(rc->ctx) {
 304                 SSL_CTX_free(rc->ctx);
 305         }
 306         free(rc);
 307 }
 308
 309 /**
 310  * Add and open a new control port
 311  * @param ip: ip str
 312  * @param nr: port nr
 313  * @param list: list head
 314  * @param noproto_is_err: if lack of protocol support is an error.
 315  * @param cfg: config with username for chown of unix-sockets.
 316  * @return false on failure.
 317  */
 318 static int
 319 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
 320         struct config_file* cfg)
 321 {
 322         struct addrinfo hints;
 323         struct addrinfo* res;
 324         struct listen_port* n;
 325         int noproto;
 326         int fd, r;
 327         char port[15];
 328         snprintf(port, sizeof(port), "%d", nr);
 329         port[sizeof(port)-1]=0;
 330         memset(&hints, 0, sizeof(hints));
 331
 332         if(ip[0] == '/') {
 333                 /* This looks like a local socket */
 334                 fd = create_local_accept_sock(ip, &noproto);
 335                 /*
 336                  * Change socket ownership and permissions so users other
 337                  * than root can access it provided they are in the same
 338                  * group as the user we run as.
 339                  */
 340                 if(fd != -1) {
 341 #ifdef HAVE_CHOWN
 342                         if (cfg->username && cfg->username[0] &&
 343                                 cfg_uid != (uid_t)-1)
 344                                 chown(ip, cfg_uid, cfg_gid);
 345                         chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
 346 #else
 347                         (void)cfg;
 348 #endif
 349                 }
 350         } else {
 351                 hints.ai_socktype = SOCK_STREAM;
 352                 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 353                 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 354 #ifdef USE_WINSOCK
 355                         if(!noproto_is_err && r == EAI_NONAME) {
 356                                 /* tried to lookup the address as name */
 357                                 return 1; /* return success, but do nothing */
 358                         }
 359 #endif /* USE_WINSOCK */
 360                         log_err("control interface %s:%s getaddrinfo: %s %s",
 361                                 ip?ip:"default", port, gai_strerror(r),
 362 #ifdef EAI_SYSTEM
 363                                 r==EAI_SYSTEM?(char*)strerror(errno):""
 364 #else
 365                                 ""
 366 #endif
 367                         );
 368                         return 0;
 369                 }
 370
 371                 /* open fd */
 372                 fd = create_tcp_accept_sock(res, 1, &noproto, 0,
 373                         cfg->ip_transparent);
 374                 freeaddrinfo(res);
 375         }
 376
 377         if(fd == -1 && noproto) {
 378                 if(!noproto_is_err)
 379                         return 1; /* return success, but do nothing */
 380                 log_err("cannot open control interface %s %d : "
 381                         "protocol not supported", ip, nr);
 382                 return 0;
 383         }
 384         if(fd == -1) {
 385                 log_err("cannot open control interface %s %d", ip, nr);
 386                 return 0;
 387         }
 388
 389         /* alloc */
 390         n = (struct listen_port*)calloc(1, sizeof(*n));
 391         if(!n) {
 392 #ifndef USE_WINSOCK
 393                 close(fd);
 394 #else
 395                 closesocket(fd);
 396 #endif
 397                 log_err("out of memory");
 398                 return 0;
 399         }
 400         n->next = *list;
 401         *list = n;
 402         n->fd = fd;
 403         return 1;
 404 }
 405
 406 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 407 {
 408         struct listen_port* l = NULL;
 409         log_assert(cfg->remote_control_enable && cfg->control_port);
 410         if(cfg->control_ifs) {
 411                 struct config_strlist* p;
 412                 for(p = cfg->control_ifs; p; p = p->next) {
 413                         if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
 414                                 listening_ports_free(l);
 415                                 return NULL;
 416                         }
 417                 }
 418         } else {
 419                 /* defaults */
 420                 if(cfg->do_ip6 &&
 421                         !add_open("::1", cfg->control_port, &l, 0, cfg)) {
 422                         listening_ports_free(l);
 423                         return NULL;
 424                 }
 425                 if(cfg->do_ip4 &&
 426                         !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
 427                         listening_ports_free(l);
 428                         return NULL;
 429                 }
 430         }
 431         return l;
 432 }
 433
 434 /** open accept commpoint */
 435 static int
 436 accept_open(struct daemon_remote* rc, int fd)
 437 {
 438         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 439         if(!n) {
 440                 log_err("out of memory");
 441                 return 0;
 442         }
 443         n->next = rc->accept_list;
 444         rc->accept_list = n;
 445         /* open commpt */
 446         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 447                 &remote_accept_callback, rc);
 448         if(!n->com)
 449                 return 0;
 450         /* keep this port open, its fd is kept in the rc portlist */
 451         n->com->do_not_close = 1;
 452         return 1;
 453 }
 454
 455 int daemon_remote_open_accept(struct daemon_remote* rc,
 456         struct listen_port* ports, struct worker* worker)
 457 {
 458         struct listen_port* p;
 459         rc->worker = worker;
 460         for(p = ports; p; p = p->next) {
 461                 if(!accept_open(rc, p->fd)) {
 462                         log_err("could not create accept comm point");
 463                         return 0;
 464                 }
 465         }
 466         return 1;
 467 }
 468
 469 void daemon_remote_stop_accept(struct daemon_remote* rc)
 470 {
 471         struct listen_list* p;
 472         for(p=rc->accept_list; p; p=p->next) {
 473                 comm_point_stop_listening(p->com);
 474         }
 475 }
 476
 477 void daemon_remote_start_accept(struct daemon_remote* rc)
 478 {
 479         struct listen_list* p;
 480         for(p=rc->accept_list; p; p=p->next) {
 481                 comm_point_start_listening(p->com, -1, -1);
 482         }
 483 }
 484
 485 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 486         struct comm_reply* ATTR_UNUSED(rep))
 487 {
 488         struct daemon_remote* rc = (struct daemon_remote*)arg;
 489         struct sockaddr_storage addr;
 490         socklen_t addrlen;
 491         int newfd;
 492         struct rc_state* n;
 493         if(err != NETEVENT_NOERROR) {
 494                 log_err("error %d on remote_accept_callback", err);
 495                 return 0;
 496         }
 497         /* perform the accept */
 498         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 499         if(newfd == -1)
 500                 return 0;
 501         /* create new commpoint unless we are servicing already */
 502         if(rc->active >= rc->max_active) {
 503                 log_warn("drop incoming remote control: too many connections");
 504         close_exit:
 505 #ifndef USE_WINSOCK
 506                 close(newfd);
 507 #else
 508                 closesocket(newfd);
 509 #endif
 510                 return 0;
 511         }
 512
 513         /* setup commpoint to service the remote control command */
 514         n = (struct rc_state*)calloc(1, sizeof(*n));
 515         if(!n) {
 516                 log_err("out of memory");
 517                 goto close_exit;
 518         }
 519         /* start in reading state */
 520         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 521                 &remote_control_callback, n);
 522         if(!n->c) {
 523                 log_err("out of memory");
 524                 free(n);
 525                 goto close_exit;
 526         }
 527         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 528         n->c->do_not_close = 0;
 529         comm_point_stop_listening(n->c);
 530         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 531         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 532         n->c->repinfo.addrlen = addrlen;
 533         n->shake_state = rc_hs_read;
 534         n->ssl = SSL_new(rc->ctx);
 535         if(!n->ssl) {
 536                 log_crypto_err("could not SSL_new");
 537                 comm_point_delete(n->c);
 538                 free(n);
 539                 goto close_exit;
 540         }
 541         SSL_set_accept_state(n->ssl);
 542         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 543         if(!SSL_set_fd(n->ssl, newfd)) {
 544                 log_crypto_err("could not SSL_set_fd");
 545                 SSL_free(n->ssl);
 546                 comm_point_delete(n->c);
 547                 free(n);
 548                 goto close_exit;
 549         }
 550
 551         n->rc = rc;
 552         n->next = rc->busy_list;
 553         rc->busy_list = n;
 554         rc->active ++;
 555
 556         /* perform the first nonblocking read already, for windows,
 557          * so it can return wouldblock. could be faster too. */
 558         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 559         return 0;
 560 }
 561
 562 /** delete from list */
 563 static void
 564 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 565 {
 566         while(*list) {
 567                 if( (*list)->c == c) {
 568                         *list = (*list)->next;
 569                         return;
 570                 }
 571                 list = &(*list)->next;
 572         }
 573 }
 574
 575 /** decrease active count and remove commpoint from busy list */
 576 static void
 577 clean_point(struct daemon_remote* rc, struct rc_state* s)
 578 {
 579         state_list_remove_elem(&rc->busy_list, s->c);
 580         rc->active --;
 581         if(s->ssl) {
 582                 SSL_shutdown(s->ssl);
 583                 SSL_free(s->ssl);
 584         }
 585         comm_point_delete(s->c);
 586         free(s);
 587 }
 588
 589 int
 590 ssl_print_text(SSL* ssl, const char* text)
 591 {
 592         int r;
 593         if(!ssl)
 594                 return 0;
 595         ERR_clear_error();
 596         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 597                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 598                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 599                                 "closed connection");
 600                         return 0;
 601                 }
 602                 log_crypto_err("could not SSL_write");
 603                 return 0;
 604         }
 605         return 1;
 606 }
 607
 608 /** print text over the ssl connection */
 609 static int
 610 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 611 {
 612         char msg[1024];
 613         vsnprintf(msg, sizeof(msg), format, args);
 614         return ssl_print_text(ssl, msg);
 615 }
 616
 617 /** printf style printing to the ssl connection */
 618 int ssl_printf(SSL* ssl, const char* format, ...)
 619 {
 620         va_list args;
 621         int ret;
 622         va_start(args, format);
 623         ret = ssl_print_vmsg(ssl, format, args);
 624         va_end(args);
 625         return ret;
 626 }
 627
 628 int
 629 ssl_read_line(SSL* ssl, char* buf, size_t max)
 630 {
 631         int r;
 632         size_t len = 0;
 633         if(!ssl)
 634                 return 0;
 635         while(len < max) {
 636                 ERR_clear_error();
 637                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 638                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 639                                 buf[len] = 0;
 640                                 return 1;
 641                         }
 642                         log_crypto_err("could not SSL_read");
 643                         return 0;
 644                 }
 645                 if(buf[len] == '\n') {
 646                         /* return string without \n */
 647                         buf[len] = 0;
 648                         return 1;
 649                 }
 650                 len++;
 651         }
 652         buf[max-1] = 0;
 653         log_err("control line too long (%d): %s", (int)max, buf);
 654         return 0;
 655 }
 656
 657 /** skip whitespace, return new pointer into string */
 658 static char*
 659 skipwhite(char* str)
 660 {
 661         /* EOS \0 is not a space */
 662         while( isspace((unsigned char)*str) )
 663                 str++;
 664         return str;
 665 }
 666
 667 /** send the OK to the control client */
 668 static void send_ok(SSL* ssl)
 669 {
 670         (void)ssl_printf(ssl, "ok\n");
 671 }
 672
 673 /** do the stop command */
 674 static void
 675 do_stop(SSL* ssl, struct daemon_remote* rc)
 676 {
 677         rc->worker->need_to_exit = 1;
 678         comm_base_exit(rc->worker->base);
 679         send_ok(ssl);
 680 }
 681
 682 /** do the reload command */
 683 static void
 684 do_reload(SSL* ssl, struct daemon_remote* rc)
 685 {
 686         rc->worker->need_to_exit = 0;
 687         comm_base_exit(rc->worker->base);
 688         send_ok(ssl);
 689 }
 690
 691 /** do the verbosity command */
 692 static void
 693 do_verbosity(SSL* ssl, char* str)
 694 {
 695         int val = atoi(str);
 696         if(val == 0 && strcmp(str, "0") != 0) {
 697                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 698                 return;
 699         }
 700         verbosity = val;
 701         send_ok(ssl);
 702 }
 703
 704 /** print stats from statinfo */
 705 static int
 706 print_stats(SSL* ssl, const char* nm, struct stats_info* s)
 707 {
 708         struct timeval avg;
 709         if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 710                 (unsigned long)s->svr.num_queries)) return 0;
 711         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
 712                 (unsigned long)(s->svr.num_queries
 713                         - s->svr.num_queries_missed_cache))) return 0;
 714         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 715                 (unsigned long)s->svr.num_queries_missed_cache)) return 0;
 716         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 717                 (unsigned long)s->svr.num_queries_prefetch)) return 0;
 718         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 719                 (unsigned long)s->mesh_replies_sent)) return 0;
 720         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 721                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 722                         (double)s->svr.sum_query_list_size/
 723                         (s->svr.num_queries_missed_cache+
 724                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 725         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm,
 726                 (unsigned long)s->svr.max_query_list_size)) return 0;
 727         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm,
 728                 (unsigned long)s->mesh_jostled)) return 0;
 729         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm,
 730                 (unsigned long)s->mesh_dropped)) return 0;
 731         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm,
 732                 (unsigned long)s->mesh_num_states)) return 0;
 733         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm,
 734                 (unsigned long)s->mesh_num_reply_states)) return 0;
 735         timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
 736         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 737                 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
 738         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 739                 s->mesh_time_median)) return 0;
 740         if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm,
 741                 (unsigned long)s->svr.tcp_accept_usage)) return 0;
 742         return 1;
 743 }
 744
 745 /** print stats for one thread */
 746 static int
 747 print_thread_stats(SSL* ssl, int i, struct stats_info* s)
 748 {
 749         char nm[16];
 750         snprintf(nm, sizeof(nm), "thread%d", i);
 751         nm[sizeof(nm)-1]=0;
 752         return print_stats(ssl, nm, s);
 753 }
 754
 755 /** print long number */
 756 static int
 757 print_longnum(SSL* ssl, const char* desc, size_t x)
 758 {
 759         if(x > 1024*1024*1024) {
 760                 /* more than a Gb */
 761                 size_t front = x / (size_t)1000000;
 762                 size_t back = x % (size_t)1000000;
 763                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 764                         (unsigned)front, (unsigned)back);
 765         } else {
 766                 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
 767         }
 768 }
 769
 770 /** print mem stats */
 771 static int
 772 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 773 {
 774         int m;
 775         size_t msg, rrset, val, iter;
 776 #ifdef HAVE_SBRK
 777         extern void* unbound_start_brk;
 778         void* cur = sbrk(0);
 779         if(!print_longnum(ssl, "mem.total.sbrk"SQ,
 780                 (size_t)((char*)cur - (char*)unbound_start_brk))) return 0;
 781 #endif /* HAVE_SBRK */
 782         msg = slabhash_get_mem(daemon->env->msg_cache);
 783         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 784         val=0;
 785         iter=0;
 786         m = modstack_find(&worker->env.mesh->mods, "validator");
 787         if(m != -1) {
 788                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 789                         mods.mod[m]->get_mem));
 790                 val = (*worker->env.mesh->mods.mod[m]->get_mem)
 791                         (&worker->env, m);
 792         }
 793         m = modstack_find(&worker->env.mesh->mods, "iterator");
 794         if(m != -1) {
 795                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 796                         mods.mod[m]->get_mem));
 797                 iter = (*worker->env.mesh->mods.mod[m]->get_mem)
 798                         (&worker->env, m);
 799         }
 800
 801         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 802                 return 0;
 803         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 804                 return 0;
 805         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 806                 return 0;
 807         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 808                 return 0;
 809         return 1;
 810 }
 811
 812 /** print uptime stats */
 813 static int
 814 print_uptime(SSL* ssl, struct worker* worker, int reset)
 815 {
 816         struct timeval now = *worker->env.now_tv;
 817         struct timeval up, dt;
 818         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 819         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 820         if(reset)
 821                 worker->daemon->time_last_stat = now;
 822         if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 823                 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 824         if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 825                 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 826         if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 827                 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 828         return 1;
 829 }
 830
 831 /** print extended histogram */
 832 static int
 833 print_hist(SSL* ssl, struct stats_info* s)
 834 {
 835         struct timehist* hist;
 836         size_t i;
 837         hist = timehist_setup();
 838         if(!hist) {
 839                 log_err("out of memory");
 840                 return 0;
 841         }
 842         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 843         for(i=0; i<hist->num; i++) {
 844                 if(!ssl_printf(ssl,
 845                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 846                         (int)hist->buckets[i].lower.tv_sec,
 847                         (int)hist->buckets[i].lower.tv_usec,
 848                         (int)hist->buckets[i].upper.tv_sec,
 849                         (int)hist->buckets[i].upper.tv_usec,
 850                         (unsigned long)hist->buckets[i].count)) {
 851                         timehist_delete(hist);
 852                         return 0;
 853                 }
 854         }
 855         timehist_delete(hist);
 856         return 1;
 857 }
 858
 859 /** print extended stats */
 860 static int
 861 print_ext(SSL* ssl, struct stats_info* s)
 862 {
 863         int i;
 864         char nm[16];
 865         const sldns_rr_descriptor* desc;
 866         const sldns_lookup_table* lt;
 867         /* TYPE */
 868         for(i=0; i<STATS_QTYPE_NUM; i++) {
 869                 if(inhibit_zero && s->svr.qtype[i] == 0)
 870                         continue;
 871                 desc = sldns_rr_descript((uint16_t)i);
 872                 if(desc && desc->_name) {
 873                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 874                 } else if (i == LDNS_RR_TYPE_IXFR) {
 875                         snprintf(nm, sizeof(nm), "IXFR");
 876                 } else if (i == LDNS_RR_TYPE_AXFR) {
 877                         snprintf(nm, sizeof(nm), "AXFR");
 878                 } else if (i == LDNS_RR_TYPE_MAILA) {
 879                         snprintf(nm, sizeof(nm), "MAILA");
 880                 } else if (i == LDNS_RR_TYPE_MAILB) {
 881                         snprintf(nm, sizeof(nm), "MAILB");
 882                 } else if (i == LDNS_RR_TYPE_ANY) {
 883                         snprintf(nm, sizeof(nm), "ANY");
 884                 } else {
 885                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 886                 }
 887                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 888                         nm, (unsigned long)s->svr.qtype[i])) return 0;
 889         }
 890         if(!inhibit_zero || s->svr.qtype_big) {
 891                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 892                         (unsigned long)s->svr.qtype_big)) return 0;
 893         }
 894         /* CLASS */
 895         for(i=0; i<STATS_QCLASS_NUM; i++) {
 896                 if(inhibit_zero && s->svr.qclass[i] == 0)
 897                         continue;
 898                 lt = sldns_lookup_by_id(sldns_rr_classes, i);
 899                 if(lt && lt->name) {
 900                         snprintf(nm, sizeof(nm), "%s", lt->name);
 901                 } else {
 902                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 903                 }
 904                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 905                         nm, (unsigned long)s->svr.qclass[i])) return 0;
 906         }
 907         if(!inhibit_zero || s->svr.qclass_big) {
 908                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 909                         (unsigned long)s->svr.qclass_big)) return 0;
 910         }
 911         /* OPCODE */
 912         for(i=0; i<STATS_OPCODE_NUM; i++) {
 913                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 914                         continue;
 915                 lt = sldns_lookup_by_id(sldns_opcodes, i);
 916                 if(lt && lt->name) {
 917                         snprintf(nm, sizeof(nm), "%s", lt->name);
 918                 } else {
 919                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 920                 }
 921                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 922                         nm, (unsigned long)s->svr.qopcode[i])) return 0;
 923         }
 924         /* transport */
 925         if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
 926                 (unsigned long)s->svr.qtcp)) return 0;
 927         if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
 928                 (unsigned long)s->svr.qtcp_outgoing)) return 0;
 929         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
 930                 (unsigned long)s->svr.qipv6)) return 0;
 931         /* flags */
 932         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
 933                 (unsigned long)s->svr.qbit_QR)) return 0;
 934         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
 935                 (unsigned long)s->svr.qbit_AA)) return 0;
 936         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
 937                 (unsigned long)s->svr.qbit_TC)) return 0;
 938         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
 939                 (unsigned long)s->svr.qbit_RD)) return 0;
 940         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
 941                 (unsigned long)s->svr.qbit_RA)) return 0;
 942         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
 943                 (unsigned long)s->svr.qbit_Z)) return 0;
 944         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
 945                 (unsigned long)s->svr.qbit_AD)) return 0;
 946         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
 947                 (unsigned long)s->svr.qbit_CD)) return 0;
 948         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
 949                 (unsigned long)s->svr.qEDNS)) return 0;
 950         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
 951                 (unsigned long)s->svr.qEDNS_DO)) return 0;
 952
 953         /* RCODE */
 954         for(i=0; i<STATS_RCODE_NUM; i++) {
 955                 /* Always include RCODEs 0-5 */
 956                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
 957                         continue;
 958                 lt = sldns_lookup_by_id(sldns_rcodes, i);
 959                 if(lt && lt->name) {
 960                         snprintf(nm, sizeof(nm), "%s", lt->name);
 961                 } else {
 962                         snprintf(nm, sizeof(nm), "RCODE%d", i);
 963                 }
 964                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
 965                         nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
 966         }
 967         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
 968                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
 969                         (unsigned long)s->svr.ans_rcode_nodata)) return 0;
 970         }
 971         /* validation */
 972         if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
 973                 (unsigned long)s->svr.ans_secure)) return 0;
 974         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
 975                 (unsigned long)s->svr.ans_bogus)) return 0;
 976         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
 977                 (unsigned long)s->svr.rrset_bogus)) return 0;
 978         /* threat detection */
 979         if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
 980                 (unsigned long)s->svr.unwanted_queries)) return 0;
 981         if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
 982                 (unsigned long)s->svr.unwanted_replies)) return 0;
 983         /* cache counts */
 984         if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
 985                 (unsigned)s->svr.msg_cache_count)) return 0;
 986         if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n",
 987                 (unsigned)s->svr.rrset_cache_count)) return 0;
 988         if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n",
 989                 (unsigned)s->svr.infra_cache_count)) return 0;
 990         if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
 991                 (unsigned)s->svr.key_cache_count)) return 0;
 992         return 1;
 993 }
 994
 995 /** do the stats command */
 996 static void
 997 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
 998 {
 999         struct daemon* daemon = rc->worker->daemon;
1000         struct stats_info total;
1001         struct stats_info s;
1002         int i;
1003         log_assert(daemon->num > 0);
1004         /* gather all thread statistics in one place */
1005         for(i=0; i<daemon->num; i++) {
1006                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
1007                 if(!print_thread_stats(ssl, i, &s))
1008                         return;
1009                 if(i == 0)
1010                         total = s;
1011                 else    server_stats_add(&total, &s);
1012         }
1013         /* print the thread statistics */
1014         total.mesh_time_median /= (double)daemon->num;
1015         if(!print_stats(ssl, "total", &total))
1016                 return;
1017         if(!print_uptime(ssl, rc->worker, reset))
1018                 return;
1019         if(daemon->cfg->stat_extended) {
1020                 if(!print_mem(ssl, rc->worker, daemon))
1021                         return;
1022                 if(!print_hist(ssl, &total))
1023                         return;
1024                 if(!print_ext(ssl, &total))
1025                         return;
1026         }
1027 }
1028
1029 /** parse commandline argument domain name */
1030 static int
1031 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
1032 {
1033         uint8_t nm[LDNS_MAX_DOMAINLEN+1];
1034         size_t nmlen = sizeof(nm);
1035         int status;
1036         *res = NULL;
1037         *len = 0;
1038         *labs = 0;
1039         status = sldns_str2wire_dname_buf(str, nm, &nmlen);
1040         if(status != 0) {
1041                 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str,
1042                         LDNS_WIREPARSE_OFFSET(status),
1043                         sldns_get_errorstr_parse(status));
1044                 return 0;
1045         }
1046         *res = memdup(nm, nmlen);
1047         if(!*res) {
1048                 ssl_printf(ssl, "error out of memory\n");
1049                 return 0;
1050         }
1051         *labs = dname_count_size_labels(*res, len);
1052         return 1;
1053 }
1054
1055 /** find second argument, modifies string */
1056 static int
1057 find_arg2(SSL* ssl, char* arg, char** arg2)
1058 {
1059         char* as = strchr(arg, ' ');
1060         char* at = strchr(arg, '\t');
1061         if(as && at) {
1062                 if(at < as)
1063                         as = at;
1064                 as[0]=0;
1065                 *arg2 = skipwhite(as+1);
1066         } else if(as) {
1067                 as[0]=0;
1068                 *arg2 = skipwhite(as+1);
1069         } else if(at) {
1070                 at[0]=0;
1071                 *arg2 = skipwhite(at+1);
1072         } else {
1073                 ssl_printf(ssl, "error could not find next argument "
1074                         "after %s\n", arg);
1075                 return 0;
1076         }
1077         return 1;
1078 }
1079
1080 /** Add a new zone */
1081 static void
1082 do_zone_add(SSL* ssl, struct worker* worker, char* arg)
1083 {
1084         uint8_t* nm;
1085         int nmlabs;
1086         size_t nmlen;
1087         char* arg2;
1088         enum localzone_type t;
1089         struct local_zone* z;
1090         if(!find_arg2(ssl, arg, &arg2))
1091                 return;
1092         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1093                 return;
1094         if(!local_zone_str2type(arg2, &t)) {
1095                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
1096                 free(nm);
1097                 return;
1098         }
1099         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1100         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1101                 nmlabs, LDNS_RR_CLASS_IN))) {
1102                 /* already present in tree */
1103                 lock_rw_wrlock(&z->lock);
1104                 z->type = t; /* update type anyway */
1105                 lock_rw_unlock(&z->lock);
1106                 free(nm);
1107                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1108                 send_ok(ssl);
1109                 return;
1110         }
1111         if(!local_zones_add_zone(worker->daemon->local_zones, nm, nmlen,
1112                 nmlabs, LDNS_RR_CLASS_IN, t)) {
1113                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1114                 ssl_printf(ssl, "error out of memory\n");
1115                 return;
1116         }
1117         lock_rw_unlock(&worker->daemon->local_zones->lock);
1118         send_ok(ssl);
1119 }
1120
1121 /** Remove a zone */
1122 static void
1123 do_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1124 {
1125         uint8_t* nm;
1126         int nmlabs;
1127         size_t nmlen;
1128         struct local_zone* z;
1129         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1130                 return;
1131         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1132         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1133                 nmlabs, LDNS_RR_CLASS_IN))) {
1134                 /* present in tree */
1135                 local_zones_del_zone(worker->daemon->local_zones, z);
1136         }
1137         lock_rw_unlock(&worker->daemon->local_zones->lock);
1138         free(nm);
1139         send_ok(ssl);
1140 }
1141
1142 /** Add new RR data */
1143 static void
1144 do_data_add(SSL* ssl, struct worker* worker, char* arg)
1145 {
1146         if(!local_zones_add_RR(worker->daemon->local_zones, arg)) {
1147                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1148                 return;
1149         }
1150         send_ok(ssl);
1151 }
1152
1153 /** Remove RR data */
1154 static void
1155 do_data_remove(SSL* ssl, struct worker* worker, char* arg)
1156 {
1157         uint8_t* nm;
1158         int nmlabs;
1159         size_t nmlen;
1160         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1161                 return;
1162         local_zones_del_data(worker->daemon->local_zones, nm,
1163                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1164         free(nm);
1165         send_ok(ssl);
1166 }
1167
1168 /** cache lookup of nameservers */
1169 static void
1170 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1171 {
1172         uint8_t* nm;
1173         int nmlabs;
1174         size_t nmlen;
1175         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1176                 return;
1177         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1178         free(nm);
1179 }
1180
1181 /** flush something from rrset and msg caches */
1182 static void
1183 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1184         uint16_t t, uint16_t c)
1185 {
1186         hashvalue_t h;
1187         struct query_info k;
1188         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1189         if(t == LDNS_RR_TYPE_SOA)
1190                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1191                         PACKED_RRSET_SOA_NEG);
1192         k.qname = nm;
1193         k.qname_len = nmlen;
1194         k.qtype = t;
1195         k.qclass = c;
1196         h = query_info_hash(&k, 0);
1197         slabhash_remove(worker->env.msg_cache, h, &k);
1198         if(t == LDNS_RR_TYPE_AAAA) {
1199                 /* for AAAA also flush dns64 bit_cd packet */
1200                 h = query_info_hash(&k, BIT_CD);
1201                 slabhash_remove(worker->env.msg_cache, h, &k);
1202         }
1203 }
1204
1205 /** flush a type */
1206 static void
1207 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1208 {
1209         uint8_t* nm;
1210         int nmlabs;
1211         size_t nmlen;
1212         char* arg2;
1213         uint16_t t;
1214         if(!find_arg2(ssl, arg, &arg2))
1215                 return;
1216         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1217                 return;
1218         t = sldns_get_rr_type_by_name(arg2);
1219         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1220
1221         free(nm);
1222         send_ok(ssl);
1223 }
1224
1225 /** flush statistics */
1226 static void
1227 do_flush_stats(SSL* ssl, struct worker* worker)
1228 {
1229         worker_stats_clear(worker);
1230         send_ok(ssl);
1231 }
1232
1233 /**
1234  * Local info for deletion functions
1235  */
1236 struct del_info {
1237         /** worker */
1238         struct worker* worker;
1239         /** name to delete */
1240         uint8_t* name;
1241         /** length */
1242         size_t len;
1243         /** labels */
1244         int labs;
1245         /** now */
1246         time_t now;
1247         /** time to invalidate to */
1248         time_t expired;
1249         /** number of rrsets removed */
1250         size_t num_rrsets;
1251         /** number of msgs removed */
1252         size_t num_msgs;
1253         /** number of key entries removed */
1254         size_t num_keys;
1255         /** length of addr */
1256         socklen_t addrlen;
1257         /** socket address for host deletion */
1258         struct sockaddr_storage addr;
1259 };
1260
1261 /** callback to delete hosts in infra cache */
1262 static void
1263 infra_del_host(struct lruhash_entry* e, void* arg)
1264 {
1265         /* entry is locked */
1266         struct del_info* inf = (struct del_info*)arg;
1267         struct infra_key* k = (struct infra_key*)e->key;
1268         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1269                 struct infra_data* d = (struct infra_data*)e->data;
1270                 d->probedelay = 0;
1271                 d->timeout_A = 0;
1272                 d->timeout_AAAA = 0;
1273                 d->timeout_other = 0;
1274                 rtt_init(&d->rtt);
1275                 if(d->ttl >= inf->now) {
1276                         d->ttl = inf->expired;
1277                         inf->num_keys++;
1278                 }
1279         }
1280 }
1281
1282 /** flush infra cache */
1283 static void
1284 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1285 {
1286         struct sockaddr_storage addr;
1287         socklen_t len;
1288         struct del_info inf;
1289         if(strcmp(arg, "all") == 0) {
1290                 slabhash_clear(worker->env.infra_cache->hosts);
1291                 send_ok(ssl);
1292                 return;
1293         }
1294         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1295                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1296                 return;
1297         }
1298         /* delete all entries from cache */
1299         /* what we do is to set them all expired */
1300         inf.worker = worker;
1301         inf.name = 0;
1302         inf.len = 0;
1303         inf.labs = 0;
1304         inf.now = *worker->env.now;
1305         inf.expired = *worker->env.now;
1306         inf.expired -= 3; /* handle 3 seconds skew between threads */
1307         inf.num_rrsets = 0;
1308         inf.num_msgs = 0;
1309         inf.num_keys = 0;
1310         inf.addrlen = len;
1311         memmove(&inf.addr, &addr, len);
1312         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1313                 &inf);
1314         send_ok(ssl);
1315 }
1316
1317 /** flush requestlist */
1318 static void
1319 do_flush_requestlist(SSL* ssl, struct worker* worker)
1320 {
1321         mesh_delete_all(worker->env.mesh);
1322         send_ok(ssl);
1323 }
1324
1325 /** callback to delete rrsets in a zone */
1326 static void
1327 zone_del_rrset(struct lruhash_entry* e, void* arg)
1328 {
1329         /* entry is locked */
1330         struct del_info* inf = (struct del_info*)arg;
1331         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1332         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1333                 struct packed_rrset_data* d =
1334                         (struct packed_rrset_data*)e->data;
1335                 if(d->ttl >= inf->now) {
1336                         d->ttl = inf->expired;
1337                         inf->num_rrsets++;
1338                 }
1339         }
1340 }
1341
1342 /** callback to delete messages in a zone */
1343 static void
1344 zone_del_msg(struct lruhash_entry* e, void* arg)
1345 {
1346         /* entry is locked */
1347         struct del_info* inf = (struct del_info*)arg;
1348         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1349         if(dname_subdomain_c(k->key.qname, inf->name)) {
1350                 struct reply_info* d = (struct reply_info*)e->data;
1351                 if(d->ttl >= inf->now) {
1352                         d->ttl = inf->expired;
1353                         inf->num_msgs++;
1354                 }
1355         }
1356 }
1357
1358 /** callback to delete keys in zone */
1359 static void
1360 zone_del_kcache(struct lruhash_entry* e, void* arg)
1361 {
1362         /* entry is locked */
1363         struct del_info* inf = (struct del_info*)arg;
1364         struct key_entry_key* k = (struct key_entry_key*)e->key;
1365         if(dname_subdomain_c(k->name, inf->name)) {
1366                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1367                 if(d->ttl >= inf->now) {
1368                         d->ttl = inf->expired;
1369                         inf->num_keys++;
1370                 }
1371         }
1372 }
1373
1374 /** remove all rrsets and keys from zone from cache */
1375 static void
1376 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1377 {
1378         uint8_t* nm;
1379         int nmlabs;
1380         size_t nmlen;
1381         struct del_info inf;
1382         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1383                 return;
1384         /* delete all RRs and key entries from zone */
1385         /* what we do is to set them all expired */
1386         inf.worker = worker;
1387         inf.name = nm;
1388         inf.len = nmlen;
1389         inf.labs = nmlabs;
1390         inf.now = *worker->env.now;
1391         inf.expired = *worker->env.now;
1392         inf.expired -= 3; /* handle 3 seconds skew between threads */
1393         inf.num_rrsets = 0;
1394         inf.num_msgs = 0;
1395         inf.num_keys = 0;
1396         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1397                 &zone_del_rrset, &inf);
1398
1399         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1400
1401         /* and validator cache */
1402         if(worker->env.key_cache) {
1403                 slabhash_traverse(worker->env.key_cache->slab, 1,
1404                         &zone_del_kcache, &inf);
1405         }
1406
1407         free(nm);
1408
1409         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1410                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1411                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1412 }
1413
1414 /** callback to delete bogus rrsets */
1415 static void
1416 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1417 {
1418         /* entry is locked */
1419         struct del_info* inf = (struct del_info*)arg;
1420         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1421         if(d->security == sec_status_bogus) {
1422                 d->ttl = inf->expired;
1423                 inf->num_rrsets++;
1424         }
1425 }
1426
1427 /** callback to delete bogus messages */
1428 static void
1429 bogus_del_msg(struct lruhash_entry* e, void* arg)
1430 {
1431         /* entry is locked */
1432         struct del_info* inf = (struct del_info*)arg;
1433         struct reply_info* d = (struct reply_info*)e->data;
1434         if(d->security == sec_status_bogus) {
1435                 d->ttl = inf->expired;
1436                 inf->num_msgs++;
1437         }
1438 }
1439
1440 /** callback to delete bogus keys */
1441 static void
1442 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1443 {
1444         /* entry is locked */
1445         struct del_info* inf = (struct del_info*)arg;
1446         struct key_entry_data* d = (struct key_entry_data*)e->data;
1447         if(d->isbad) {
1448                 d->ttl = inf->expired;
1449                 inf->num_keys++;
1450         }
1451 }
1452
1453 /** remove all bogus rrsets, msgs and keys from cache */
1454 static void
1455 do_flush_bogus(SSL* ssl, struct worker* worker)
1456 {
1457         struct del_info inf;
1458         /* what we do is to set them all expired */
1459         inf.worker = worker;
1460         inf.now = *worker->env.now;
1461         inf.expired = *worker->env.now;
1462         inf.expired -= 3; /* handle 3 seconds skew between threads */
1463         inf.num_rrsets = 0;
1464         inf.num_msgs = 0;
1465         inf.num_keys = 0;
1466         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1467                 &bogus_del_rrset, &inf);
1468
1469         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1470
1471         /* and validator cache */
1472         if(worker->env.key_cache) {
1473                 slabhash_traverse(worker->env.key_cache->slab, 1,
1474                         &bogus_del_kcache, &inf);
1475         }
1476
1477         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1478                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1479                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1480 }
1481
1482 /** callback to delete negative and servfail rrsets */
1483 static void
1484 negative_del_rrset(struct lruhash_entry* e, void* arg)
1485 {
1486         /* entry is locked */
1487         struct del_info* inf = (struct del_info*)arg;
1488         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1489         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1490         /* delete the parentside negative cache rrsets,
1491          * these are namerserver rrsets that failed lookup, rdata empty */
1492         if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 &&
1493                 d->rrsig_count == 0 && d->rr_len[0] == 0) {
1494                 d->ttl = inf->expired;
1495                 inf->num_rrsets++;
1496         }
1497 }
1498
1499 /** callback to delete negative and servfail messages */
1500 static void
1501 negative_del_msg(struct lruhash_entry* e, void* arg)
1502 {
1503         /* entry is locked */
1504         struct del_info* inf = (struct del_info*)arg;
1505         struct reply_info* d = (struct reply_info*)e->data;
1506         /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error
1507          * or NOERROR rcode with ANCOUNT==0: a NODATA answer */
1508         if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) {
1509                 d->ttl = inf->expired;
1510                 inf->num_msgs++;
1511         }
1512 }
1513
1514 /** callback to delete negative key entries */
1515 static void
1516 negative_del_kcache(struct lruhash_entry* e, void* arg)
1517 {
1518         /* entry is locked */
1519         struct del_info* inf = (struct del_info*)arg;
1520         struct key_entry_data* d = (struct key_entry_data*)e->data;
1521         /* could be bad because of lookup failure on the DS, DNSKEY, which
1522          * was nxdomain or servfail, and thus a result of negative lookups */
1523         if(d->isbad) {
1524                 d->ttl = inf->expired;
1525                 inf->num_keys++;
1526         }
1527 }
1528
1529 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */
1530 static void
1531 do_flush_negative(SSL* ssl, struct worker* worker)
1532 {
1533         struct del_info inf;
1534         /* what we do is to set them all expired */
1535         inf.worker = worker;
1536         inf.now = *worker->env.now;
1537         inf.expired = *worker->env.now;
1538         inf.expired -= 3; /* handle 3 seconds skew between threads */
1539         inf.num_rrsets = 0;
1540         inf.num_msgs = 0;
1541         inf.num_keys = 0;
1542         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1543                 &negative_del_rrset, &inf);
1544
1545         slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
1546
1547         /* and validator cache */
1548         if(worker->env.key_cache) {
1549                 slabhash_traverse(worker->env.key_cache->slab, 1,
1550                         &negative_del_kcache, &inf);
1551         }
1552
1553         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1554                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1555                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1556 }
1557
1558 /** remove name rrset from cache */
1559 static void
1560 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1561 {
1562         uint8_t* nm;
1563         int nmlabs;
1564         size_t nmlen;
1565         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1566                 return;
1567         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1568         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1569         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1570         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1571         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1572         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1573         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1574         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1575         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1576         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1577
1578         free(nm);
1579         send_ok(ssl);
1580 }
1581
1582 /** printout a delegation point info */
1583 static int
1584 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1585         struct delegpt* dp)
1586 {
1587         char buf[257];
1588         struct delegpt_ns* ns;
1589         struct delegpt_addr* a;
1590         int f = 0;
1591         if(str) { /* print header for forward, stub */
1592                 char* c = sldns_wire2str_class(dclass);
1593                 dname_str(nm, buf);
1594                 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) {
1595                         free(c);
1596                         return 0;
1597                 }
1598                 free(c);
1599         }
1600         for(ns = dp->nslist; ns; ns = ns->next) {
1601                 dname_str(ns->name, buf);
1602                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1603                         return 0;
1604                 f = 1;
1605         }
1606         for(a = dp->target_list; a; a = a->next_target) {
1607                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1608                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1609                         return 0;
1610                 f = 1;
1611         }
1612         return ssl_printf(ssl, "\n");
1613 }
1614
1615
1616 /** print root forwards */
1617 static int
1618 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1619 {
1620         struct delegpt* dp;
1621         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1622         if(!dp)
1623                 return ssl_printf(ssl, "off (using root hints)\n");
1624         /* if dp is returned it must be the root */
1625         log_assert(query_dname_compare(dp->name, root)==0);
1626         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1627 }
1628
1629 /** parse args into delegpt */
1630 static struct delegpt*
1631 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1632 {
1633         /* parse args and add in */
1634         char* p = args;
1635         char* todo;
1636         struct delegpt* dp = delegpt_create_mlc(nm);
1637         struct sockaddr_storage addr;
1638         socklen_t addrlen;
1639         if(!dp) {
1640                 (void)ssl_printf(ssl, "error out of memory\n");
1641                 return NULL;
1642         }
1643         while(p) {
1644                 todo = p;
1645                 p = strchr(p, ' '); /* find next spot, if any */
1646                 if(p) {
1647                         *p++ = 0;       /* end this spot */
1648                         p = skipwhite(p); /* position at next spot */
1649                 }
1650                 /* parse address */
1651                 if(!extstrtoaddr(todo, &addr, &addrlen)) {
1652                         if(allow_names) {
1653                                 uint8_t* n = NULL;
1654                                 size_t ln;
1655                                 int lb;
1656                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1657                                         (void)ssl_printf(ssl, "error cannot "
1658                                                 "parse IP address or name "
1659                                                 "'%s'\n", todo);
1660                                         delegpt_free_mlc(dp);
1661                                         return NULL;
1662                                 }
1663                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1664                                         (void)ssl_printf(ssl, "error out of memory\n");
1665                                         free(n);
1666                                         delegpt_free_mlc(dp);
1667                                         return NULL;
1668                                 }
1669                                 free(n);
1670
1671                         } else {
1672                                 (void)ssl_printf(ssl, "error cannot parse"
1673                                         " IP address '%s'\n", todo);
1674                                 delegpt_free_mlc(dp);
1675                                 return NULL;
1676                         }
1677                 } else {
1678                         /* add address */
1679                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
1680                                 (void)ssl_printf(ssl, "error out of memory\n");
1681                                 delegpt_free_mlc(dp);
1682                                 return NULL;
1683                         }
1684                 }
1685         }
1686         return dp;
1687 }
1688
1689 /** do the status command */
1690 static void
1691 do_forward(SSL* ssl, struct worker* worker, char* args)
1692 {
1693         struct iter_forwards* fwd = worker->env.fwds;
1694         uint8_t* root = (uint8_t*)"\000";
1695         if(!fwd) {
1696                 (void)ssl_printf(ssl, "error: structure not allocated\n");
1697                 return;
1698         }
1699         if(args == NULL || args[0] == 0) {
1700                 (void)print_root_fwds(ssl, fwd, root);
1701                 return;
1702         }
1703         /* set root forwards for this thread. since we are in remote control
1704          * the actual mesh is not running, so we can freely edit it. */
1705         /* delete all the existing queries first */
1706         mesh_delete_all(worker->env.mesh);
1707         if(strcmp(args, "off") == 0) {
1708                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
1709         } else {
1710                 struct delegpt* dp;
1711                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
1712                         return;
1713                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1714                         (void)ssl_printf(ssl, "error out of memory\n");
1715                         return;
1716                 }
1717         }
1718         send_ok(ssl);
1719 }
1720
1721 static int
1722 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
1723         int* insecure, int* prime)
1724 {
1725         char* zonename;
1726         char* rest;
1727         size_t nmlen;
1728         int nmlabs;
1729         /* parse all -x args */
1730         while(args[0] == '+') {
1731                 if(!find_arg2(ssl, args, &rest))
1732                         return 0;
1733                 while(*(++args) != 0) {
1734                         if(*args == 'i' && insecure)
1735                                 *insecure = 1;
1736                         else if(*args == 'p' && prime)
1737                                 *prime = 1;
1738                         else {
1739                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
1740                                 return 0;
1741                         }
1742                 }
1743                 args = rest;
1744         }
1745         /* parse name */
1746         if(dp) {
1747                 if(!find_arg2(ssl, args, &rest))
1748                         return 0;
1749                 zonename = args;
1750                 args = rest;
1751         } else  zonename = args;
1752         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
1753                 return 0;
1754
1755         /* parse dp */
1756         if(dp) {
1757                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
1758                         free(*nm);
1759                         return 0;
1760                 }
1761         }
1762         return 1;
1763 }
1764
1765 /** do the forward_add command */
1766 static void
1767 do_forward_add(SSL* ssl, struct worker* worker, char* args)
1768 {
1769         struct iter_forwards* fwd = worker->env.fwds;
1770         int insecure = 0;
1771         uint8_t* nm = NULL;
1772         struct delegpt* dp = NULL;
1773         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
1774                 return;
1775         if(insecure && worker->env.anchors) {
1776                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1777                         nm)) {
1778                         (void)ssl_printf(ssl, "error out of memory\n");
1779                         delegpt_free_mlc(dp);
1780                         free(nm);
1781                         return;
1782                 }
1783         }
1784         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1785                 (void)ssl_printf(ssl, "error out of memory\n");
1786                 free(nm);
1787                 return;
1788         }
1789         free(nm);
1790         send_ok(ssl);
1791 }
1792
1793 /** do the forward_remove command */
1794 static void
1795 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
1796 {
1797         struct iter_forwards* fwd = worker->env.fwds;
1798         int insecure = 0;
1799         uint8_t* nm = NULL;
1800         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1801                 return;
1802         if(insecure && worker->env.anchors)
1803                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1804                         nm);
1805         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
1806         free(nm);
1807         send_ok(ssl);
1808 }
1809
1810 /** do the stub_add command */
1811 static void
1812 do_stub_add(SSL* ssl, struct worker* worker, char* args)
1813 {
1814         struct iter_forwards* fwd = worker->env.fwds;
1815         int insecure = 0, prime = 0;
1816         uint8_t* nm = NULL;
1817         struct delegpt* dp = NULL;
1818         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
1819                 return;
1820         if(insecure && worker->env.anchors) {
1821                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1822                         nm)) {
1823                         (void)ssl_printf(ssl, "error out of memory\n");
1824                         delegpt_free_mlc(dp);
1825                         free(nm);
1826                         return;
1827                 }
1828         }
1829         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
1830                 if(insecure && worker->env.anchors)
1831                         anchors_delete_insecure(worker->env.anchors,
1832                                 LDNS_RR_CLASS_IN, nm);
1833                 (void)ssl_printf(ssl, "error out of memory\n");
1834                 delegpt_free_mlc(dp);
1835                 free(nm);
1836                 return;
1837         }
1838         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
1839                 (void)ssl_printf(ssl, "error out of memory\n");
1840                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1841                 if(insecure && worker->env.anchors)
1842                         anchors_delete_insecure(worker->env.anchors,
1843                                 LDNS_RR_CLASS_IN, nm);
1844                 free(nm);
1845                 return;
1846         }
1847         free(nm);
1848         send_ok(ssl);
1849 }
1850
1851 /** do the stub_remove command */
1852 static void
1853 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
1854 {
1855         struct iter_forwards* fwd = worker->env.fwds;
1856         int insecure = 0;
1857         uint8_t* nm = NULL;
1858         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1859                 return;
1860         if(insecure && worker->env.anchors)
1861                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1862                         nm);
1863         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1864         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
1865         free(nm);
1866         send_ok(ssl);
1867 }
1868
1869 /** do the insecure_add command */
1870 static void
1871 do_insecure_add(SSL* ssl, struct worker* worker, char* arg)
1872 {
1873         size_t nmlen;
1874         int nmlabs;
1875         uint8_t* nm = NULL;
1876         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1877                 return;
1878         if(worker->env.anchors) {
1879                 if(!anchors_add_insecure(worker->env.anchors,
1880                         LDNS_RR_CLASS_IN, nm)) {
1881                         (void)ssl_printf(ssl, "error out of memory\n");
1882                         free(nm);
1883                         return;
1884                 }
1885         }
1886         free(nm);
1887         send_ok(ssl);
1888 }
1889
1890 /** do the insecure_remove command */
1891 static void
1892 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg)
1893 {
1894         size_t nmlen;
1895         int nmlabs;
1896         uint8_t* nm = NULL;
1897         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1898                 return;
1899         if(worker->env.anchors)
1900                 anchors_delete_insecure(worker->env.anchors,
1901                         LDNS_RR_CLASS_IN, nm);
1902         free(nm);
1903         send_ok(ssl);
1904 }
1905
1906 static void
1907 do_insecure_list(SSL* ssl, struct worker* worker)
1908 {
1909         char buf[257];
1910         struct trust_anchor* a;
1911         if(worker->env.anchors) {
1912                 RBTREE_FOR(a, struct trust_anchor*, worker->env.anchors->tree) {
1913                         if(a->numDS == 0 && a->numDNSKEY == 0) {
1914                                 dname_str(a->name, buf);
1915                                 ssl_printf(ssl, "%s\n", buf);
1916                         }
1917                 }
1918         }
1919 }
1920
1921 /** do the status command */
1922 static void
1923 do_status(SSL* ssl, struct worker* worker)
1924 {
1925         int i;
1926         time_t uptime;
1927         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
1928                 return;
1929         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
1930                 return;
1931         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
1932                 return;
1933         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
1934                 return;
1935         for(i=0; i<worker->daemon->mods.num; i++) {
1936                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
1937                         return;
1938         }
1939         if(!ssl_printf(ssl, " ]\n"))
1940                 return;
1941         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
1942         if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
1943                 return;
1944         if(!ssl_printf(ssl, "options:%s%s\n" ,
1945                 (worker->daemon->reuseport?" reuseport":""),
1946                 (worker->daemon->rc->accept_list?" control(ssl)":"")))
1947                 return;
1948         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
1949                 (int)getpid()))
1950                 return;
1951 }
1952
1953 /** get age for the mesh state */
1954 static void
1955 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
1956         struct module_env* env)
1957 {
1958         if(m->reply_list) {
1959                 struct timeval d;
1960                 struct mesh_reply* r = m->reply_list;
1961                 /* last reply is the oldest */
1962                 while(r && r->next)
1963                         r = r->next;
1964                 timeval_subtract(&d, env->now_tv, &r->start_time);
1965                 snprintf(buf, len, ARG_LL "d.%6.6d",
1966                         (long long)d.tv_sec, (int)d.tv_usec);
1967         } else {
1968                 snprintf(buf, len, "-");
1969         }
1970 }
1971
1972 /** get status of a mesh state */
1973 static void
1974 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
1975         char* buf, size_t len)
1976 {
1977         enum module_ext_state s = m->s.ext_state[m->s.curmod];
1978         const char *modname = mesh->mods.mod[m->s.curmod]->name;
1979         size_t l;
1980         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
1981                 m->s.minfo[m->s.curmod]) {
1982                 /* break into iterator to find out who its waiting for */
1983                 struct iter_qstate* qstate = (struct iter_qstate*)
1984                         m->s.minfo[m->s.curmod];
1985                 struct outbound_list* ol = &qstate->outlist;
1986                 struct outbound_entry* e;
1987                 snprintf(buf, len, "%s wait for", modname);
1988                 l = strlen(buf);
1989                 buf += l; len -= l;
1990                 if(ol->first == NULL)
1991                         snprintf(buf, len, " (empty_list)");
1992                 for(e = ol->first; e; e = e->next) {
1993                         snprintf(buf, len, " ");
1994                         l = strlen(buf);
1995                         buf += l; len -= l;
1996                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
1997                                 buf, len);
1998                         l = strlen(buf);
1999                         buf += l; len -= l;
2000                 }
2001         } else if(s == module_wait_subquery) {
2002                 /* look in subs from mesh state to see what */
2003                 char nm[257];
2004                 struct mesh_state_ref* sub;
2005                 snprintf(buf, len, "%s wants", modname);
2006                 l = strlen(buf);
2007                 buf += l; len -= l;
2008                 if(m->sub_set.count == 0)
2009                         snprintf(buf, len, " (empty_list)");
2010                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
2011                         char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype);
2012                         char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
2013                         dname_str(sub->s->s.qinfo.qname, nm);
2014                         snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"),
2015                                 (c?c:"CLASS??"), nm);
2016                         l = strlen(buf);
2017                         buf += l; len -= l;
2018                         free(t);
2019                         free(c);
2020                 }
2021         } else {
2022                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
2023         }
2024 }
2025
2026 /** do the dump_requestlist command */
2027 static void
2028 do_dump_requestlist(SSL* ssl, struct worker* worker)
2029 {
2030         struct mesh_area* mesh;
2031         struct mesh_state* m;
2032         int num = 0;
2033         char buf[257];
2034         char timebuf[32];
2035         char statbuf[10240];
2036         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
2037                 return;
2038         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
2039                 return;
2040         /* show worker mesh contents */
2041         mesh = worker->env.mesh;
2042         if(!mesh) return;
2043         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
2044                 char* t = sldns_wire2str_type(m->s.qinfo.qtype);
2045                 char* c = sldns_wire2str_class(m->s.qinfo.qclass);
2046                 dname_str(m->s.qinfo.qname, buf);
2047                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
2048                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
2049                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
2050                         num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
2051                         statbuf)) {
2052                         free(t);
2053                         free(c);
2054                         return;
2055                 }
2056                 num++;
2057                 free(t);
2058                 free(c);
2059         }
2060 }
2061
2062 /** structure for argument data for dump infra host */
2063 struct infra_arg {
2064         /** the infra cache */
2065         struct infra_cache* infra;
2066         /** the SSL connection */
2067         SSL* ssl;
2068         /** the time now */
2069         time_t now;
2070         /** ssl failure? stop writing and skip the rest.  If the tcp
2071          * connection is broken, and writes fail, we then stop writing. */
2072         int ssl_failed;
2073 };
2074
2075 /** callback for every host element in the infra cache */
2076 static void
2077 dump_infra_host(struct lruhash_entry* e, void* arg)
2078 {
2079         struct infra_arg* a = (struct infra_arg*)arg;
2080         struct infra_key* k = (struct infra_key*)e->key;
2081         struct infra_data* d = (struct infra_data*)e->data;
2082         char ip_str[1024];
2083         char name[257];
2084         if(a->ssl_failed)
2085                 return;
2086         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
2087         dname_str(k->zonename, name);
2088         /* skip expired stuff (only backed off) */
2089         if(d->ttl < a->now) {
2090                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
2091                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
2092                                 name, d->rtt.rto))  {
2093                                 a->ssl_failed = 1;
2094                                 return;
2095                         }
2096                 }
2097                 return;
2098         }
2099         if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d "
2100                 "tA %d tAAAA %d tother %d "
2101                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
2102                 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now),
2103                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
2104                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
2105                 (int)d->edns_lame_known, (int)d->edns_version,
2106                 (int)(a->now<d->probedelay?(d->probedelay - a->now):0),
2107                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
2108                 (int)d->lame_other)) {
2109                 a->ssl_failed = 1;
2110                 return;
2111         }
2112 }
2113
2114 /** do the dump_infra command */
2115 static void
2116 do_dump_infra(SSL* ssl, struct worker* worker)
2117 {
2118         struct infra_arg arg;
2119         arg.infra = worker->env.infra_cache;
2120         arg.ssl = ssl;
2121         arg.now = *worker->env.now;
2122         arg.ssl_failed = 0;
2123         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
2124 }
2125
2126 /** do the log_reopen command */
2127 static void
2128 do_log_reopen(SSL* ssl, struct worker* worker)
2129 {
2130         struct config_file* cfg = worker->env.cfg;
2131         send_ok(ssl);
2132         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
2133 }
2134
2135 /** do the set_option command */
2136 static void
2137 do_set_option(SSL* ssl, struct worker* worker, char* arg)
2138 {
2139         char* arg2;
2140         if(!find_arg2(ssl, arg, &arg2))
2141                 return;
2142         if(!config_set_option(worker->env.cfg, arg, arg2)) {
2143                 (void)ssl_printf(ssl, "error setting option\n");
2144                 return;
2145         }
2146         send_ok(ssl);
2147 }
2148
2149 /* routine to printout option values over SSL */
2150 void remote_get_opt_ssl(char* line, void* arg)
2151 {
2152         SSL* ssl = (SSL*)arg;
2153         (void)ssl_printf(ssl, "%s\n", line);
2154 }
2155
2156 /** do the get_option command */
2157 static void
2158 do_get_option(SSL* ssl, struct worker* worker, char* arg)
2159 {
2160         int r;
2161         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
2162         if(!r) {
2163                 (void)ssl_printf(ssl, "error unknown option\n");
2164                 return;
2165         }
2166 }
2167
2168 /** do the list_forwards command */
2169 static void
2170 do_list_forwards(SSL* ssl, struct worker* worker)
2171 {
2172         /* since its a per-worker structure no locks needed */
2173         struct iter_forwards* fwds = worker->env.fwds;
2174         struct iter_forward_zone* z;
2175         struct trust_anchor* a;
2176         int insecure;
2177         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
2178                 if(!z->dp) continue; /* skip empty marker for stub */
2179
2180                 /* see if it is insecure */
2181                 insecure = 0;
2182                 if(worker->env.anchors &&
2183                         (a=anchor_find(worker->env.anchors, z->name,
2184                         z->namelabs, z->namelen,  z->dclass))) {
2185                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2186                                 insecure = 1;
2187                         lock_basic_unlock(&a->lock);
2188                 }
2189
2190                 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
2191                         z->name, z->dclass, z->dp))
2192                         return;
2193         }
2194 }
2195
2196 /** do the list_stubs command */
2197 static void
2198 do_list_stubs(SSL* ssl, struct worker* worker)
2199 {
2200         struct iter_hints_stub* z;
2201         struct trust_anchor* a;
2202         int insecure;
2203         char str[32];
2204         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
2205
2206                 /* see if it is insecure */
2207                 insecure = 0;
2208                 if(worker->env.anchors &&
2209                         (a=anchor_find(worker->env.anchors, z->node.name,
2210                         z->node.labs, z->node.len,  z->node.dclass))) {
2211                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2212                                 insecure = 1;
2213                         lock_basic_unlock(&a->lock);
2214                 }
2215
2216                 snprintf(str, sizeof(str), "stub %sprime%s",
2217                         (z->noprime?"no":""), (insecure?" +i":""));
2218                 if(!ssl_print_name_dp(ssl, str, z->node.name,
2219                         z->node.dclass, z->dp))
2220                         return;
2221         }
2222 }
2223
2224 /** do the list_local_zones command */
2225 static void
2226 do_list_local_zones(SSL* ssl, struct worker* worker)
2227 {
2228         struct local_zones* zones = worker->daemon->local_zones;
2229         struct local_zone* z;
2230         char buf[257];
2231         lock_rw_rdlock(&zones->lock);
2232         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2233                 lock_rw_rdlock(&z->lock);
2234                 dname_str(z->name, buf);
2235                 if(!ssl_printf(ssl, "%s %s\n", buf,
2236                         local_zone_type2str(z->type))) {
2237                         /* failure to print */
2238                         lock_rw_unlock(&z->lock);
2239                         lock_rw_unlock(&zones->lock);
2240                         return;
2241                 }
2242                 lock_rw_unlock(&z->lock);
2243         }
2244         lock_rw_unlock(&zones->lock);
2245 }
2246
2247 /** do the list_local_data command */
2248 static void
2249 do_list_local_data(SSL* ssl, struct worker* worker)
2250 {
2251         struct local_zones* zones = worker->daemon->local_zones;
2252         struct local_zone* z;
2253         struct local_data* d;
2254         struct local_rrset* p;
2255         char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer);
2256         size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer);
2257         lock_rw_rdlock(&zones->lock);
2258         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2259                 lock_rw_rdlock(&z->lock);
2260                 RBTREE_FOR(d, struct local_data*, &z->data) {
2261                         for(p = d->rrsets; p; p = p->next) {
2262                                 struct packed_rrset_data* d =
2263                                         (struct packed_rrset_data*)p->rrset->entry.data;
2264                                 size_t i;
2265                                 for(i=0; i<d->count + d->rrsig_count; i++) {
2266                                         if(!packed_rr_to_string(p->rrset, i,
2267                                                 0, s, slen)) {
2268                                                 if(!ssl_printf(ssl, "BADRR\n"))
2269                                                         return;
2270                                         }
2271                                         if(!ssl_printf(ssl, "%s\n", s))
2272                                                 return;
2273                                 }
2274                         }
2275                 }
2276                 lock_rw_unlock(&z->lock);
2277         }
2278         lock_rw_unlock(&zones->lock);
2279 }
2280
2281 /** struct for user arg ratelimit list */
2282 struct ratelimit_list_arg {
2283         /** the infra cache */
2284         struct infra_cache* infra;
2285         /** the SSL to print to */
2286         SSL* ssl;
2287         /** all or only ratelimited */
2288         int all;
2289         /** current time */
2290         time_t now;
2291 };
2292
2293 /** list items in the ratelimit table */
2294 static void
2295 rate_list(struct lruhash_entry* e, void* arg)
2296 {
2297         struct ratelimit_list_arg* a = (struct ratelimit_list_arg*)arg;
2298         struct rate_key* k = (struct rate_key*)e->key;
2299         struct rate_data* d = (struct rate_data*)e->data;
2300         char buf[257];
2301         int lim = infra_find_ratelimit(a->infra, k->name, k->namelen);
2302         int max = infra_rate_max(d, a->now);
2303         if(a->all == 0) {
2304                 if(max < lim)
2305                         return;
2306         }
2307         dname_str(k->name, buf);
2308         ssl_printf(a->ssl, "%s %d limit %d\n", buf, max, lim);
2309 }
2310
2311 /** do the ratelimit_list command */
2312 static void
2313 do_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2314 {
2315         struct ratelimit_list_arg a;
2316         a.all = 0;
2317         a.infra = worker->env.infra_cache;
2318         a.now = *worker->env.now;
2319         a.ssl = ssl;
2320         arg = skipwhite(arg);
2321         if(strcmp(arg, "+a") == 0)
2322                 a.all = 1;
2323         if(a.infra->domain_rates==NULL ||
2324                 (a.all == 0 && infra_dp_ratelimit == 0))
2325                 return;
2326         slabhash_traverse(a.infra->domain_rates, 0, rate_list, &a);
2327 }
2328
2329 /** tell other processes to execute the command */
2330 static void
2331 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
2332 {
2333         int i;
2334         if(!cmd || !ssl)
2335                 return;
2336         /* skip i=0 which is me */
2337         for(i=1; i<rc->worker->daemon->num; i++) {
2338                 worker_send_cmd(rc->worker->daemon->workers[i],
2339                         worker_cmd_remote);
2340                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
2341                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
2342                         ssl_printf(ssl, "error could not distribute cmd\n");
2343                         return;
2344                 }
2345         }
2346 }
2347
2348 /** check for name with end-of-string, space or tab after it */
2349 static int
2350 cmdcmp(char* p, const char* cmd, size_t len)
2351 {
2352         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
2353 }
2354
2355 /** execute a remote control command */
2356 static void
2357 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
2358         struct worker* worker)
2359 {
2360         char* p = skipwhite(cmd);
2361         /* compare command */
2362         if(cmdcmp(p, "stop", 4)) {
2363                 do_stop(ssl, rc);
2364                 return;
2365         } else if(cmdcmp(p, "reload", 6)) {
2366                 do_reload(ssl, rc);
2367                 return;
2368         } else if(cmdcmp(p, "stats_noreset", 13)) {
2369                 do_stats(ssl, rc, 0);
2370                 return;
2371         } else if(cmdcmp(p, "stats", 5)) {
2372                 do_stats(ssl, rc, 1);
2373                 return;
2374         } else if(cmdcmp(p, "status", 6)) {
2375                 do_status(ssl, worker);
2376                 return;
2377         } else if(cmdcmp(p, "dump_cache", 10)) {
2378                 (void)dump_cache(ssl, worker);
2379                 return;
2380         } else if(cmdcmp(p, "load_cache", 10)) {
2381                 if(load_cache(ssl, worker)) send_ok(ssl);
2382                 return;
2383         } else if(cmdcmp(p, "list_forwards", 13)) {
2384                 do_list_forwards(ssl, worker);
2385                 return;
2386         } else if(cmdcmp(p, "list_stubs", 10)) {
2387                 do_list_stubs(ssl, worker);
2388                 return;
2389         } else if(cmdcmp(p, "list_insecure", 13)) {
2390                 do_insecure_list(ssl, worker);
2391                 return;
2392         } else if(cmdcmp(p, "list_local_zones", 16)) {
2393                 do_list_local_zones(ssl, worker);
2394                 return;
2395         } else if(cmdcmp(p, "list_local_data", 15)) {
2396                 do_list_local_data(ssl, worker);
2397                 return;
2398         } else if(cmdcmp(p, "ratelimit_list", 14)) {
2399                 do_ratelimit_list(ssl, worker, p+14);
2400                 return;
2401         } else if(cmdcmp(p, "stub_add", 8)) {
2402                 /* must always distribute this cmd */
2403                 if(rc) distribute_cmd(rc, ssl, cmd);
2404                 do_stub_add(ssl, worker, skipwhite(p+8));
2405                 return;
2406         } else if(cmdcmp(p, "stub_remove", 11)) {
2407                 /* must always distribute this cmd */
2408                 if(rc) distribute_cmd(rc, ssl, cmd);
2409                 do_stub_remove(ssl, worker, skipwhite(p+11));
2410                 return;
2411         } else if(cmdcmp(p, "forward_add", 11)) {
2412                 /* must always distribute this cmd */
2413                 if(rc) distribute_cmd(rc, ssl, cmd);
2414                 do_forward_add(ssl, worker, skipwhite(p+11));
2415                 return;
2416         } else if(cmdcmp(p, "forward_remove", 14)) {
2417                 /* must always distribute this cmd */
2418                 if(rc) distribute_cmd(rc, ssl, cmd);
2419                 do_forward_remove(ssl, worker, skipwhite(p+14));
2420                 return;
2421         } else if(cmdcmp(p, "insecure_add", 12)) {
2422                 /* must always distribute this cmd */
2423                 if(rc) distribute_cmd(rc, ssl, cmd);
2424                 do_insecure_add(ssl, worker, skipwhite(p+12));
2425                 return;
2426         } else if(cmdcmp(p, "insecure_remove", 15)) {
2427                 /* must always distribute this cmd */
2428                 if(rc) distribute_cmd(rc, ssl, cmd);
2429                 do_insecure_remove(ssl, worker, skipwhite(p+15));
2430                 return;
2431         } else if(cmdcmp(p, "forward", 7)) {
2432                 /* must always distribute this cmd */
2433                 if(rc) distribute_cmd(rc, ssl, cmd);
2434                 do_forward(ssl, worker, skipwhite(p+7));
2435                 return;
2436         } else if(cmdcmp(p, "flush_stats", 11)) {
2437                 /* must always distribute this cmd */
2438                 if(rc) distribute_cmd(rc, ssl, cmd);
2439                 do_flush_stats(ssl, worker);
2440                 return;
2441         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2442                 /* must always distribute this cmd */
2443                 if(rc) distribute_cmd(rc, ssl, cmd);
2444                 do_flush_requestlist(ssl, worker);
2445                 return;
2446         } else if(cmdcmp(p, "lookup", 6)) {
2447                 do_lookup(ssl, worker, skipwhite(p+6));
2448                 return;
2449         }
2450
2451 #ifdef THREADS_DISABLED
2452         /* other processes must execute the command as well */
2453         /* commands that should not be distributed, returned above. */
2454         if(rc) { /* only if this thread is the master (rc) thread */
2455                 /* done before the code below, which may split the string */
2456                 distribute_cmd(rc, ssl, cmd);
2457         }
2458 #endif
2459         if(cmdcmp(p, "verbosity", 9)) {
2460                 do_verbosity(ssl, skipwhite(p+9));
2461         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2462                 do_zone_remove(ssl, worker, skipwhite(p+17));
2463         } else if(cmdcmp(p, "local_zone", 10)) {
2464                 do_zone_add(ssl, worker, skipwhite(p+10));
2465         } else if(cmdcmp(p, "local_data_remove", 17)) {
2466                 do_data_remove(ssl, worker, skipwhite(p+17));
2467         } else if(cmdcmp(p, "local_data", 10)) {
2468                 do_data_add(ssl, worker, skipwhite(p+10));
2469         } else if(cmdcmp(p, "flush_zone", 10)) {
2470                 do_flush_zone(ssl, worker, skipwhite(p+10));
2471         } else if(cmdcmp(p, "flush_type", 10)) {
2472                 do_flush_type(ssl, worker, skipwhite(p+10));
2473         } else if(cmdcmp(p, "flush_infra", 11)) {
2474                 do_flush_infra(ssl, worker, skipwhite(p+11));
2475         } else if(cmdcmp(p, "flush", 5)) {
2476                 do_flush_name(ssl, worker, skipwhite(p+5));
2477         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2478                 do_dump_requestlist(ssl, worker);
2479         } else if(cmdcmp(p, "dump_infra", 10)) {
2480                 do_dump_infra(ssl, worker);
2481         } else if(cmdcmp(p, "log_reopen", 10)) {
2482                 do_log_reopen(ssl, worker);
2483         } else if(cmdcmp(p, "set_option", 10)) {
2484                 do_set_option(ssl, worker, skipwhite(p+10));
2485         } else if(cmdcmp(p, "get_option", 10)) {
2486                 do_get_option(ssl, worker, skipwhite(p+10));
2487         } else if(cmdcmp(p, "flush_bogus", 11)) {
2488                 do_flush_bogus(ssl, worker);
2489         } else if(cmdcmp(p, "flush_negative", 14)) {
2490                 do_flush_negative(ssl, worker);
2491         } else {
2492                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2493         }
2494 }
2495
2496 void
2497 daemon_remote_exec(struct worker* worker)
2498 {
2499         /* read the cmd string */
2500         uint8_t* msg = NULL;
2501         uint32_t len = 0;
2502         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2503                 log_err("daemon_remote_exec: tube_read_msg failed");
2504                 return;
2505         }
2506         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2507         execute_cmd(NULL, NULL, (char*)msg, worker);
2508         free(msg);
2509 }
2510
2511 /** handle remote control request */
2512 static void
2513 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2514 {
2515         int r;
2516         char pre[10];
2517         char magic[7];
2518         char buf[1024];
2519 #ifdef USE_WINSOCK
2520         /* makes it possible to set the socket blocking again. */
2521         /* basically removes it from winsock_event ... */
2522         WSAEventSelect(s->c->fd, NULL, 0);
2523 #endif
2524         fd_set_block(s->c->fd);
2525
2526         /* try to read magic UBCT[version]_space_ string */
2527         ERR_clear_error();
2528         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2529                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2530                         return;
2531                 log_crypto_err("could not SSL_read");
2532                 return;
2533         }
2534         magic[6] = 0;
2535         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2536                 verbose(VERB_QUERY, "control connection has bad magic string");
2537                 /* probably wrong tool connected, ignore it completely */
2538                 return;
2539         }
2540
2541         /* read the command line */
2542         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2543                 return;
2544         }
2545         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
2546         if(strcmp(magic, pre) != 0) {
2547                 verbose(VERB_QUERY, "control connection had bad "
2548                         "version %s, cmd: %s", magic, buf);
2549                 ssl_printf(ssl, "error version mismatch\n");
2550                 return;
2551         }
2552         verbose(VERB_DETAIL, "control cmd: %s", buf);
2553
2554         /* figure out what to do */
2555         execute_cmd(rc, ssl, buf, rc->worker);
2556 }
2557
2558 int remote_control_callback(struct comm_point* c, void* arg, int err,
2559         struct comm_reply* ATTR_UNUSED(rep))
2560 {
2561         struct rc_state* s = (struct rc_state*)arg;
2562         struct daemon_remote* rc = s->rc;
2563         int r;
2564         if(err != NETEVENT_NOERROR) {
2565                 if(err==NETEVENT_TIMEOUT)
2566                         log_err("remote control timed out");
2567                 clean_point(rc, s);
2568                 return 0;
2569         }
2570         /* (continue to) setup the SSL connection */
2571         ERR_clear_error();
2572         r = SSL_do_handshake(s->ssl);
2573         if(r != 1) {
2574                 int r2 = SSL_get_error(s->ssl, r);
2575                 if(r2 == SSL_ERROR_WANT_READ) {
2576                         if(s->shake_state == rc_hs_read) {
2577                                 /* try again later */
2578                                 return 0;
2579                         }
2580                         s->shake_state = rc_hs_read;
2581                         comm_point_listen_for_rw(c, 1, 0);
2582                         return 0;
2583                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
2584                         if(s->shake_state == rc_hs_write) {
2585                                 /* try again later */
2586                                 return 0;
2587                         }
2588                         s->shake_state = rc_hs_write;
2589                         comm_point_listen_for_rw(c, 0, 1);
2590                         return 0;
2591                 } else {
2592                         if(r == 0)
2593                                 log_err("remote control connection closed prematurely");
2594                         log_addr(1, "failed connection from",
2595                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
2596                         log_crypto_err("remote control failed ssl");
2597                         clean_point(rc, s);
2598                         return 0;
2599                 }
2600         }
2601         s->shake_state = rc_none;
2602
2603         /* once handshake has completed, check authentication */
2604         if (!rc->use_cert) {
2605                 verbose(VERB_ALGO, "unauthenticated remote control connection");
2606         } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
2607                 X509* x = SSL_get_peer_certificate(s->ssl);
2608                 if(!x) {
2609                         verbose(VERB_DETAIL, "remote control connection "
2610                                 "provided no client certificate");
2611                         clean_point(rc, s);
2612                         return 0;
2613                 }
2614                 verbose(VERB_ALGO, "remote control connection authenticated");
2615                 X509_free(x);
2616         } else {
2617                 verbose(VERB_DETAIL, "remote control connection failed to "
2618                         "authenticate with client certificate");
2619                 clean_point(rc, s);
2620                 return 0;
2621         }
2622
2623         /* if OK start to actually handle the request */
2624         handle_req(rc, s, s->ssl);
2625
2626         verbose(VERB_ALGO, "remote control operation completed");
2627         clean_point(rc, s);
2628         return 0;
2629 }