contrib/unbound/daemon/remote.c

   1 /*
   2  * daemon/remote.c - remote control for the unbound daemon.
   3  *
   4  * Copyright (c) 2008, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains the remote control functionality for the daemon.
  40  * The remote control can be performed using either the commandline
  41  * unbound-control tool, or a TLS capable web browser.
  42  * The channel is secured using TLSv1, and certificates.
  43  * Both the server and the client(control tool) have their own keys.
  44  */
  45 #include "config.h"
  46 #ifdef HAVE_OPENSSL_ERR_H
  47 #include <openssl/err.h>
  48 #endif
  49 #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                 != SSL_OP_NO_SSLv2){
 213                 log_crypto_err("could not set SSL_OP_NO_SSLv2");
 214                 daemon_remote_delete(rc);
 215                 return NULL;
 216         }
 217         if((SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3)
 218                 != SSL_OP_NO_SSLv3){
 219                 log_crypto_err("could not set SSL_OP_NO_SSLv3");
 220                 daemon_remote_delete(rc);
 221                 return NULL;
 222         }
 223
 224         if (cfg->remote_control_use_cert == 0) {
 225                 /* No certificates are requested */
 226                 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL")) {
 227                         log_crypto_err("Failed to set aNULL cipher list");
 228                         return NULL;
 229                 }
 230
 231                 /* Since we have no certificates and hence no source of
 232                  * DH params, let's generate and set them
 233                  */
 234                 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh1024())) {
 235                         log_crypto_err("Wanted to set DH param, but failed");
 236                         return NULL;
 237                 }
 238                 return rc;
 239         }
 240         rc->use_cert = 1;
 241         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 242         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 243         if(!s_cert || !s_key) {
 244                 log_err("out of memory in remote control fname");
 245                 goto setup_error;
 246         }
 247         verbose(VERB_ALGO, "setup SSL certificates");
 248         if (!SSL_CTX_use_certificate_chain_file(rc->ctx,s_cert)) {
 249                 log_err("Error for server-cert-file: %s", s_cert);
 250                 log_crypto_err("Error in SSL_CTX use_certificate_chain_file");
 251                 goto setup_error;
 252         }
 253         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 254                 log_err("Error for server-key-file: %s", s_key);
 255                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 256                 goto setup_error;
 257         }
 258         if(!SSL_CTX_check_private_key(rc->ctx)) {
 259                 log_err("Error for server-key-file: %s", s_key);
 260                 log_crypto_err("Error in SSL_CTX check_private_key");
 261                 goto setup_error;
 262         }
 263 #if HAVE_DECL_SSL_CTX_SET_ECDH_AUTO
 264         if(!SSL_CTX_set_ecdh_auto(rc->ctx,1)) {
 265                 log_crypto_err("Error in SSL_CTX_ecdh_auto, not enabling ECDHE");
 266         }
 267 #elif defined(USE_ECDSA)
 268         if(1) {
 269                 EC_KEY *ecdh = EC_KEY_new_by_curve_name (NID_X9_62_prime256v1);
 270                 if (!ecdh) {
 271                         log_crypto_err("could not find p256, not enabling ECDHE");
 272                 } else {
 273                         if (1 != SSL_CTX_set_tmp_ecdh (rc->ctx, ecdh)) {
 274                                 log_crypto_err("Error in SSL_CTX_set_tmp_ecdh, not enabling ECDHE");
 275                         }
 276                         EC_KEY_free (ecdh);
 277                 }
 278         }
 279 #endif
 280         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 281                 log_crypto_err("Error setting up SSL_CTX verify locations");
 282         setup_error:
 283                 free(s_cert);
 284                 free(s_key);
 285                 daemon_remote_delete(rc);
 286                 return NULL;
 287         }
 288         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 289         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 290         free(s_cert);
 291         free(s_key);
 292
 293         return rc;
 294 }
 295
 296 void daemon_remote_clear(struct daemon_remote* rc)
 297 {
 298         struct rc_state* p, *np;
 299         if(!rc) return;
 300         /* but do not close the ports */
 301         listen_list_delete(rc->accept_list);
 302         rc->accept_list = NULL;
 303         /* do close these sockets */
 304         p = rc->busy_list;
 305         while(p) {
 306                 np = p->next;
 307                 if(p->ssl)
 308                         SSL_free(p->ssl);
 309                 comm_point_delete(p->c);
 310                 free(p);
 311                 p = np;
 312         }
 313         rc->busy_list = NULL;
 314         rc->active = 0;
 315         rc->worker = NULL;
 316 }
 317
 318 void daemon_remote_delete(struct daemon_remote* rc)
 319 {
 320         if(!rc) return;
 321         daemon_remote_clear(rc);
 322         if(rc->ctx) {
 323                 SSL_CTX_free(rc->ctx);
 324         }
 325         free(rc);
 326 }
 327
 328 /**
 329  * Add and open a new control port
 330  * @param ip: ip str
 331  * @param nr: port nr
 332  * @param list: list head
 333  * @param noproto_is_err: if lack of protocol support is an error.
 334  * @param cfg: config with username for chown of unix-sockets.
 335  * @return false on failure.
 336  */
 337 static int
 338 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
 339         struct config_file* cfg)
 340 {
 341         struct addrinfo hints;
 342         struct addrinfo* res;
 343         struct listen_port* n;
 344         int noproto;
 345         int fd, r;
 346         char port[15];
 347         snprintf(port, sizeof(port), "%d", nr);
 348         port[sizeof(port)-1]=0;
 349         memset(&hints, 0, sizeof(hints));
 350
 351         if(ip[0] == '/') {
 352                 /* This looks like a local socket */
 353                 fd = create_local_accept_sock(ip, &noproto);
 354                 /*
 355                  * Change socket ownership and permissions so users other
 356                  * than root can access it provided they are in the same
 357                  * group as the user we run as.
 358                  */
 359                 if(fd != -1) {
 360 #ifdef HAVE_CHOWN
 361                         if (cfg->username && cfg->username[0] &&
 362                                 cfg_uid != (uid_t)-1)
 363                                 chown(ip, cfg_uid, cfg_gid);
 364                         chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
 365 #else
 366                         (void)cfg;
 367 #endif
 368                 }
 369         } else {
 370                 hints.ai_socktype = SOCK_STREAM;
 371                 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 372                 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 373 #ifdef USE_WINSOCK
 374                         if(!noproto_is_err && r == EAI_NONAME) {
 375                                 /* tried to lookup the address as name */
 376                                 return 1; /* return success, but do nothing */
 377                         }
 378 #endif /* USE_WINSOCK */
 379                         log_err("control interface %s:%s getaddrinfo: %s %s",
 380                                 ip?ip:"default", port, gai_strerror(r),
 381 #ifdef EAI_SYSTEM
 382                                 r==EAI_SYSTEM?(char*)strerror(errno):""
 383 #else
 384                                 ""
 385 #endif
 386                         );
 387                         return 0;
 388                 }
 389
 390                 /* open fd */
 391                 fd = create_tcp_accept_sock(res, 1, &noproto, 0,
 392                         cfg->ip_transparent);
 393                 freeaddrinfo(res);
 394         }
 395
 396         if(fd == -1 && noproto) {
 397                 if(!noproto_is_err)
 398                         return 1; /* return success, but do nothing */
 399                 log_err("cannot open control interface %s %d : "
 400                         "protocol not supported", ip, nr);
 401                 return 0;
 402         }
 403         if(fd == -1) {
 404                 log_err("cannot open control interface %s %d", ip, nr);
 405                 return 0;
 406         }
 407
 408         /* alloc */
 409         n = (struct listen_port*)calloc(1, sizeof(*n));
 410         if(!n) {
 411 #ifndef USE_WINSOCK
 412                 close(fd);
 413 #else
 414                 closesocket(fd);
 415 #endif
 416                 log_err("out of memory");
 417                 return 0;
 418         }
 419         n->next = *list;
 420         *list = n;
 421         n->fd = fd;
 422         return 1;
 423 }
 424
 425 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 426 {
 427         struct listen_port* l = NULL;
 428         log_assert(cfg->remote_control_enable && cfg->control_port);
 429         if(cfg->control_ifs) {
 430                 struct config_strlist* p;
 431                 for(p = cfg->control_ifs; p; p = p->next) {
 432                         if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
 433                                 listening_ports_free(l);
 434                                 return NULL;
 435                         }
 436                 }
 437         } else {
 438                 /* defaults */
 439                 if(cfg->do_ip6 &&
 440                         !add_open("::1", cfg->control_port, &l, 0, cfg)) {
 441                         listening_ports_free(l);
 442                         return NULL;
 443                 }
 444                 if(cfg->do_ip4 &&
 445                         !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
 446                         listening_ports_free(l);
 447                         return NULL;
 448                 }
 449         }
 450         return l;
 451 }
 452
 453 /** open accept commpoint */
 454 static int
 455 accept_open(struct daemon_remote* rc, int fd)
 456 {
 457         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 458         if(!n) {
 459                 log_err("out of memory");
 460                 return 0;
 461         }
 462         n->next = rc->accept_list;
 463         rc->accept_list = n;
 464         /* open commpt */
 465         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 466                 &remote_accept_callback, rc);
 467         if(!n->com)
 468                 return 0;
 469         /* keep this port open, its fd is kept in the rc portlist */
 470         n->com->do_not_close = 1;
 471         return 1;
 472 }
 473
 474 int daemon_remote_open_accept(struct daemon_remote* rc,
 475         struct listen_port* ports, struct worker* worker)
 476 {
 477         struct listen_port* p;
 478         rc->worker = worker;
 479         for(p = ports; p; p = p->next) {
 480                 if(!accept_open(rc, p->fd)) {
 481                         log_err("could not create accept comm point");
 482                         return 0;
 483                 }
 484         }
 485         return 1;
 486 }
 487
 488 void daemon_remote_stop_accept(struct daemon_remote* rc)
 489 {
 490         struct listen_list* p;
 491         for(p=rc->accept_list; p; p=p->next) {
 492                 comm_point_stop_listening(p->com);
 493         }
 494 }
 495
 496 void daemon_remote_start_accept(struct daemon_remote* rc)
 497 {
 498         struct listen_list* p;
 499         for(p=rc->accept_list; p; p=p->next) {
 500                 comm_point_start_listening(p->com, -1, -1);
 501         }
 502 }
 503
 504 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 505         struct comm_reply* ATTR_UNUSED(rep))
 506 {
 507         struct daemon_remote* rc = (struct daemon_remote*)arg;
 508         struct sockaddr_storage addr;
 509         socklen_t addrlen;
 510         int newfd;
 511         struct rc_state* n;
 512         if(err != NETEVENT_NOERROR) {
 513                 log_err("error %d on remote_accept_callback", err);
 514                 return 0;
 515         }
 516         /* perform the accept */
 517         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 518         if(newfd == -1)
 519                 return 0;
 520         /* create new commpoint unless we are servicing already */
 521         if(rc->active >= rc->max_active) {
 522                 log_warn("drop incoming remote control: too many connections");
 523         close_exit:
 524 #ifndef USE_WINSOCK
 525                 close(newfd);
 526 #else
 527                 closesocket(newfd);
 528 #endif
 529                 return 0;
 530         }
 531
 532         /* setup commpoint to service the remote control command */
 533         n = (struct rc_state*)calloc(1, sizeof(*n));
 534         if(!n) {
 535                 log_err("out of memory");
 536                 goto close_exit;
 537         }
 538         /* start in reading state */
 539         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 540                 &remote_control_callback, n);
 541         if(!n->c) {
 542                 log_err("out of memory");
 543                 free(n);
 544                 goto close_exit;
 545         }
 546         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 547         n->c->do_not_close = 0;
 548         comm_point_stop_listening(n->c);
 549         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 550         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 551         n->c->repinfo.addrlen = addrlen;
 552         n->shake_state = rc_hs_read;
 553         n->ssl = SSL_new(rc->ctx);
 554         if(!n->ssl) {
 555                 log_crypto_err("could not SSL_new");
 556                 comm_point_delete(n->c);
 557                 free(n);
 558                 goto close_exit;
 559         }
 560         SSL_set_accept_state(n->ssl);
 561         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 562         if(!SSL_set_fd(n->ssl, newfd)) {
 563                 log_crypto_err("could not SSL_set_fd");
 564                 SSL_free(n->ssl);
 565                 comm_point_delete(n->c);
 566                 free(n);
 567                 goto close_exit;
 568         }
 569
 570         n->rc = rc;
 571         n->next = rc->busy_list;
 572         rc->busy_list = n;
 573         rc->active ++;
 574
 575         /* perform the first nonblocking read already, for windows,
 576          * so it can return wouldblock. could be faster too. */
 577         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 578         return 0;
 579 }
 580
 581 /** delete from list */
 582 static void
 583 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 584 {
 585         while(*list) {
 586                 if( (*list)->c == c) {
 587                         *list = (*list)->next;
 588                         return;
 589                 }
 590                 list = &(*list)->next;
 591         }
 592 }
 593
 594 /** decrease active count and remove commpoint from busy list */
 595 static void
 596 clean_point(struct daemon_remote* rc, struct rc_state* s)
 597 {
 598         state_list_remove_elem(&rc->busy_list, s->c);
 599         rc->active --;
 600         if(s->ssl) {
 601                 SSL_shutdown(s->ssl);
 602                 SSL_free(s->ssl);
 603         }
 604         comm_point_delete(s->c);
 605         free(s);
 606 }
 607
 608 int
 609 ssl_print_text(SSL* ssl, const char* text)
 610 {
 611         int r;
 612         if(!ssl)
 613                 return 0;
 614         ERR_clear_error();
 615         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 616                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 617                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 618                                 "closed connection");
 619                         return 0;
 620                 }
 621                 log_crypto_err("could not SSL_write");
 622                 return 0;
 623         }
 624         return 1;
 625 }
 626
 627 /** print text over the ssl connection */
 628 static int
 629 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 630 {
 631         char msg[1024];
 632         vsnprintf(msg, sizeof(msg), format, args);
 633         return ssl_print_text(ssl, msg);
 634 }
 635
 636 /** printf style printing to the ssl connection */
 637 int ssl_printf(SSL* ssl, const char* format, ...)
 638 {
 639         va_list args;
 640         int ret;
 641         va_start(args, format);
 642         ret = ssl_print_vmsg(ssl, format, args);
 643         va_end(args);
 644         return ret;
 645 }
 646
 647 int
 648 ssl_read_line(SSL* ssl, char* buf, size_t max)
 649 {
 650         int r;
 651         size_t len = 0;
 652         if(!ssl)
 653                 return 0;
 654         while(len < max) {
 655                 ERR_clear_error();
 656                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 657                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 658                                 buf[len] = 0;
 659                                 return 1;
 660                         }
 661                         log_crypto_err("could not SSL_read");
 662                         return 0;
 663                 }
 664                 if(buf[len] == '\n') {
 665                         /* return string without \n */
 666                         buf[len] = 0;
 667                         return 1;
 668                 }
 669                 len++;
 670         }
 671         buf[max-1] = 0;
 672         log_err("control line too long (%d): %s", (int)max, buf);
 673         return 0;
 674 }
 675
 676 /** skip whitespace, return new pointer into string */
 677 static char*
 678 skipwhite(char* str)
 679 {
 680         /* EOS \0 is not a space */
 681         while( isspace((unsigned char)*str) )
 682                 str++;
 683         return str;
 684 }
 685
 686 /** send the OK to the control client */
 687 static void send_ok(SSL* ssl)
 688 {
 689         (void)ssl_printf(ssl, "ok\n");
 690 }
 691
 692 /** do the stop command */
 693 static void
 694 do_stop(SSL* ssl, struct daemon_remote* rc)
 695 {
 696         rc->worker->need_to_exit = 1;
 697         comm_base_exit(rc->worker->base);
 698         send_ok(ssl);
 699 }
 700
 701 /** do the reload command */
 702 static void
 703 do_reload(SSL* ssl, struct daemon_remote* rc)
 704 {
 705         rc->worker->need_to_exit = 0;
 706         comm_base_exit(rc->worker->base);
 707         send_ok(ssl);
 708 }
 709
 710 /** do the verbosity command */
 711 static void
 712 do_verbosity(SSL* ssl, char* str)
 713 {
 714         int val = atoi(str);
 715         if(val == 0 && strcmp(str, "0") != 0) {
 716                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 717                 return;
 718         }
 719         verbosity = val;
 720         send_ok(ssl);
 721 }
 722
 723 /** print stats from statinfo */
 724 static int
 725 print_stats(SSL* ssl, const char* nm, struct stats_info* s)
 726 {
 727         struct timeval avg;
 728         if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 729                 (unsigned long)s->svr.num_queries)) return 0;
 730         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
 731                 (unsigned long)(s->svr.num_queries
 732                         - s->svr.num_queries_missed_cache))) return 0;
 733         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 734                 (unsigned long)s->svr.num_queries_missed_cache)) return 0;
 735         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 736                 (unsigned long)s->svr.num_queries_prefetch)) return 0;
 737         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 738                 (unsigned long)s->mesh_replies_sent)) return 0;
 739         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 740                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 741                         (double)s->svr.sum_query_list_size/
 742                         (s->svr.num_queries_missed_cache+
 743                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 744         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm,
 745                 (unsigned long)s->svr.max_query_list_size)) return 0;
 746         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm,
 747                 (unsigned long)s->mesh_jostled)) return 0;
 748         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm,
 749                 (unsigned long)s->mesh_dropped)) return 0;
 750         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm,
 751                 (unsigned long)s->mesh_num_states)) return 0;
 752         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm,
 753                 (unsigned long)s->mesh_num_reply_states)) return 0;
 754         timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
 755         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 756                 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
 757         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 758                 s->mesh_time_median)) return 0;
 759         if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm,
 760                 (unsigned long)s->svr.tcp_accept_usage)) return 0;
 761         return 1;
 762 }
 763
 764 /** print stats for one thread */
 765 static int
 766 print_thread_stats(SSL* ssl, int i, struct stats_info* s)
 767 {
 768         char nm[16];
 769         snprintf(nm, sizeof(nm), "thread%d", i);
 770         nm[sizeof(nm)-1]=0;
 771         return print_stats(ssl, nm, s);
 772 }
 773
 774 /** print long number */
 775 static int
 776 print_longnum(SSL* ssl, const char* desc, size_t x)
 777 {
 778         if(x > 1024*1024*1024) {
 779                 /* more than a Gb */
 780                 size_t front = x / (size_t)1000000;
 781                 size_t back = x % (size_t)1000000;
 782                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 783                         (unsigned)front, (unsigned)back);
 784         } else {
 785                 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
 786         }
 787 }
 788
 789 /** print mem stats */
 790 static int
 791 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 792 {
 793         int m;
 794         size_t msg, rrset, val, iter;
 795 #ifdef HAVE_SBRK
 796         extern void* unbound_start_brk;
 797         void* cur = sbrk(0);
 798         if(!print_longnum(ssl, "mem.total.sbrk"SQ,
 799                 (size_t)((char*)cur - (char*)unbound_start_brk))) return 0;
 800 #endif /* HAVE_SBRK */
 801         msg = slabhash_get_mem(daemon->env->msg_cache);
 802         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 803         val=0;
 804         iter=0;
 805         m = modstack_find(&worker->env.mesh->mods, "validator");
 806         if(m != -1) {
 807                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 808                         mods.mod[m]->get_mem));
 809                 val = (*worker->env.mesh->mods.mod[m]->get_mem)
 810                         (&worker->env, m);
 811         }
 812         m = modstack_find(&worker->env.mesh->mods, "iterator");
 813         if(m != -1) {
 814                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 815                         mods.mod[m]->get_mem));
 816                 iter = (*worker->env.mesh->mods.mod[m]->get_mem)
 817                         (&worker->env, m);
 818         }
 819
 820         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 821                 return 0;
 822         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 823                 return 0;
 824         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 825                 return 0;
 826         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 827                 return 0;
 828         return 1;
 829 }
 830
 831 /** print uptime stats */
 832 static int
 833 print_uptime(SSL* ssl, struct worker* worker, int reset)
 834 {
 835         struct timeval now = *worker->env.now_tv;
 836         struct timeval up, dt;
 837         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 838         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 839         if(reset)
 840                 worker->daemon->time_last_stat = now;
 841         if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 842                 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 843         if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 844                 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 845         if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 846                 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 847         return 1;
 848 }
 849
 850 /** print extended histogram */
 851 static int
 852 print_hist(SSL* ssl, struct stats_info* s)
 853 {
 854         struct timehist* hist;
 855         size_t i;
 856         hist = timehist_setup();
 857         if(!hist) {
 858                 log_err("out of memory");
 859                 return 0;
 860         }
 861         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 862         for(i=0; i<hist->num; i++) {
 863                 if(!ssl_printf(ssl,
 864                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 865                         (int)hist->buckets[i].lower.tv_sec,
 866                         (int)hist->buckets[i].lower.tv_usec,
 867                         (int)hist->buckets[i].upper.tv_sec,
 868                         (int)hist->buckets[i].upper.tv_usec,
 869                         (unsigned long)hist->buckets[i].count)) {
 870                         timehist_delete(hist);
 871                         return 0;
 872                 }
 873         }
 874         timehist_delete(hist);
 875         return 1;
 876 }
 877
 878 /** print extended stats */
 879 static int
 880 print_ext(SSL* ssl, struct stats_info* s)
 881 {
 882         int i;
 883         char nm[16];
 884         const sldns_rr_descriptor* desc;
 885         const sldns_lookup_table* lt;
 886         /* TYPE */
 887         for(i=0; i<STATS_QTYPE_NUM; i++) {
 888                 if(inhibit_zero && s->svr.qtype[i] == 0)
 889                         continue;
 890                 desc = sldns_rr_descript((uint16_t)i);
 891                 if(desc && desc->_name) {
 892                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 893                 } else if (i == LDNS_RR_TYPE_IXFR) {
 894                         snprintf(nm, sizeof(nm), "IXFR");
 895                 } else if (i == LDNS_RR_TYPE_AXFR) {
 896                         snprintf(nm, sizeof(nm), "AXFR");
 897                 } else if (i == LDNS_RR_TYPE_MAILA) {
 898                         snprintf(nm, sizeof(nm), "MAILA");
 899                 } else if (i == LDNS_RR_TYPE_MAILB) {
 900                         snprintf(nm, sizeof(nm), "MAILB");
 901                 } else if (i == LDNS_RR_TYPE_ANY) {
 902                         snprintf(nm, sizeof(nm), "ANY");
 903                 } else {
 904                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 905                 }
 906                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 907                         nm, (unsigned long)s->svr.qtype[i])) return 0;
 908         }
 909         if(!inhibit_zero || s->svr.qtype_big) {
 910                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 911                         (unsigned long)s->svr.qtype_big)) return 0;
 912         }
 913         /* CLASS */
 914         for(i=0; i<STATS_QCLASS_NUM; i++) {
 915                 if(inhibit_zero && s->svr.qclass[i] == 0)
 916                         continue;
 917                 lt = sldns_lookup_by_id(sldns_rr_classes, i);
 918                 if(lt && lt->name) {
 919                         snprintf(nm, sizeof(nm), "%s", lt->name);
 920                 } else {
 921                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 922                 }
 923                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 924                         nm, (unsigned long)s->svr.qclass[i])) return 0;
 925         }
 926         if(!inhibit_zero || s->svr.qclass_big) {
 927                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 928                         (unsigned long)s->svr.qclass_big)) return 0;
 929         }
 930         /* OPCODE */
 931         for(i=0; i<STATS_OPCODE_NUM; i++) {
 932                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 933                         continue;
 934                 lt = sldns_lookup_by_id(sldns_opcodes, i);
 935                 if(lt && lt->name) {
 936                         snprintf(nm, sizeof(nm), "%s", lt->name);
 937                 } else {
 938                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 939                 }
 940                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 941                         nm, (unsigned long)s->svr.qopcode[i])) return 0;
 942         }
 943         /* transport */
 944         if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
 945                 (unsigned long)s->svr.qtcp)) return 0;
 946         if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
 947                 (unsigned long)s->svr.qtcp_outgoing)) return 0;
 948         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
 949                 (unsigned long)s->svr.qipv6)) return 0;
 950         /* flags */
 951         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
 952                 (unsigned long)s->svr.qbit_QR)) return 0;
 953         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
 954                 (unsigned long)s->svr.qbit_AA)) return 0;
 955         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
 956                 (unsigned long)s->svr.qbit_TC)) return 0;
 957         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
 958                 (unsigned long)s->svr.qbit_RD)) return 0;
 959         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
 960                 (unsigned long)s->svr.qbit_RA)) return 0;
 961         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
 962                 (unsigned long)s->svr.qbit_Z)) return 0;
 963         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
 964                 (unsigned long)s->svr.qbit_AD)) return 0;
 965         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
 966                 (unsigned long)s->svr.qbit_CD)) return 0;
 967         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
 968                 (unsigned long)s->svr.qEDNS)) return 0;
 969         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
 970                 (unsigned long)s->svr.qEDNS_DO)) return 0;
 971
 972         /* RCODE */
 973         for(i=0; i<STATS_RCODE_NUM; i++) {
 974                 /* Always include RCODEs 0-5 */
 975                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
 976                         continue;
 977                 lt = sldns_lookup_by_id(sldns_rcodes, i);
 978                 if(lt && lt->name) {
 979                         snprintf(nm, sizeof(nm), "%s", lt->name);
 980                 } else {
 981                         snprintf(nm, sizeof(nm), "RCODE%d", i);
 982                 }
 983                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
 984                         nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
 985         }
 986         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
 987                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
 988                         (unsigned long)s->svr.ans_rcode_nodata)) return 0;
 989         }
 990         /* validation */
 991         if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
 992                 (unsigned long)s->svr.ans_secure)) return 0;
 993         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
 994                 (unsigned long)s->svr.ans_bogus)) return 0;
 995         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
 996                 (unsigned long)s->svr.rrset_bogus)) return 0;
 997         /* threat detection */
 998         if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
 999                 (unsigned long)s->svr.unwanted_queries)) return 0;
1000         if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
1001                 (unsigned long)s->svr.unwanted_replies)) return 0;
1002         /* cache counts */
1003         if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
1004                 (unsigned)s->svr.msg_cache_count)) return 0;
1005         if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n",
1006                 (unsigned)s->svr.rrset_cache_count)) return 0;
1007         if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n",
1008                 (unsigned)s->svr.infra_cache_count)) return 0;
1009         if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
1010                 (unsigned)s->svr.key_cache_count)) return 0;
1011         return 1;
1012 }
1013
1014 /** do the stats command */
1015 static void
1016 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
1017 {
1018         struct daemon* daemon = rc->worker->daemon;
1019         struct stats_info total;
1020         struct stats_info s;
1021         int i;
1022         log_assert(daemon->num > 0);
1023         /* gather all thread statistics in one place */
1024         for(i=0; i<daemon->num; i++) {
1025                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
1026                 if(!print_thread_stats(ssl, i, &s))
1027                         return;
1028                 if(i == 0)
1029                         total = s;
1030                 else    server_stats_add(&total, &s);
1031         }
1032         /* print the thread statistics */
1033         total.mesh_time_median /= (double)daemon->num;
1034         if(!print_stats(ssl, "total", &total))
1035                 return;
1036         if(!print_uptime(ssl, rc->worker, reset))
1037                 return;
1038         if(daemon->cfg->stat_extended) {
1039                 if(!print_mem(ssl, rc->worker, daemon))
1040                         return;
1041                 if(!print_hist(ssl, &total))
1042                         return;
1043                 if(!print_ext(ssl, &total))
1044                         return;
1045         }
1046 }
1047
1048 /** parse commandline argument domain name */
1049 static int
1050 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
1051 {
1052         uint8_t nm[LDNS_MAX_DOMAINLEN+1];
1053         size_t nmlen = sizeof(nm);
1054         int status;
1055         *res = NULL;
1056         *len = 0;
1057         *labs = 0;
1058         status = sldns_str2wire_dname_buf(str, nm, &nmlen);
1059         if(status != 0) {
1060                 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str,
1061                         LDNS_WIREPARSE_OFFSET(status),
1062                         sldns_get_errorstr_parse(status));
1063                 return 0;
1064         }
1065         *res = memdup(nm, nmlen);
1066         if(!*res) {
1067                 ssl_printf(ssl, "error out of memory\n");
1068                 return 0;
1069         }
1070         *labs = dname_count_size_labels(*res, len);
1071         return 1;
1072 }
1073
1074 /** find second argument, modifies string */
1075 static int
1076 find_arg2(SSL* ssl, char* arg, char** arg2)
1077 {
1078         char* as = strchr(arg, ' ');
1079         char* at = strchr(arg, '\t');
1080         if(as && at) {
1081                 if(at < as)
1082                         as = at;
1083                 as[0]=0;
1084                 *arg2 = skipwhite(as+1);
1085         } else if(as) {
1086                 as[0]=0;
1087                 *arg2 = skipwhite(as+1);
1088         } else if(at) {
1089                 at[0]=0;
1090                 *arg2 = skipwhite(at+1);
1091         } else {
1092                 ssl_printf(ssl, "error could not find next argument "
1093                         "after %s\n", arg);
1094                 return 0;
1095         }
1096         return 1;
1097 }
1098
1099 /** Add a new zone */
1100 static void
1101 do_zone_add(SSL* ssl, struct worker* worker, char* arg)
1102 {
1103         uint8_t* nm;
1104         int nmlabs;
1105         size_t nmlen;
1106         char* arg2;
1107         enum localzone_type t;
1108         struct local_zone* z;
1109         if(!find_arg2(ssl, arg, &arg2))
1110                 return;
1111         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1112                 return;
1113         if(!local_zone_str2type(arg2, &t)) {
1114                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
1115                 free(nm);
1116                 return;
1117         }
1118         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1119         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1120                 nmlabs, LDNS_RR_CLASS_IN))) {
1121                 /* already present in tree */
1122                 lock_rw_wrlock(&z->lock);
1123                 z->type = t; /* update type anyway */
1124                 lock_rw_unlock(&z->lock);
1125                 free(nm);
1126                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1127                 send_ok(ssl);
1128                 return;
1129         }
1130         if(!local_zones_add_zone(worker->daemon->local_zones, nm, nmlen,
1131                 nmlabs, LDNS_RR_CLASS_IN, t)) {
1132                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1133                 ssl_printf(ssl, "error out of memory\n");
1134                 return;
1135         }
1136         lock_rw_unlock(&worker->daemon->local_zones->lock);
1137         send_ok(ssl);
1138 }
1139
1140 /** Remove a zone */
1141 static void
1142 do_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1143 {
1144         uint8_t* nm;
1145         int nmlabs;
1146         size_t nmlen;
1147         struct local_zone* z;
1148         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1149                 return;
1150         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1151         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1152                 nmlabs, LDNS_RR_CLASS_IN))) {
1153                 /* present in tree */
1154                 local_zones_del_zone(worker->daemon->local_zones, z);
1155         }
1156         lock_rw_unlock(&worker->daemon->local_zones->lock);
1157         free(nm);
1158         send_ok(ssl);
1159 }
1160
1161 /** Add new RR data */
1162 static void
1163 do_data_add(SSL* ssl, struct worker* worker, char* arg)
1164 {
1165         if(!local_zones_add_RR(worker->daemon->local_zones, arg)) {
1166                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1167                 return;
1168         }
1169         send_ok(ssl);
1170 }
1171
1172 /** Remove RR data */
1173 static void
1174 do_data_remove(SSL* ssl, struct worker* worker, char* arg)
1175 {
1176         uint8_t* nm;
1177         int nmlabs;
1178         size_t nmlen;
1179         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1180                 return;
1181         local_zones_del_data(worker->daemon->local_zones, nm,
1182                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1183         free(nm);
1184         send_ok(ssl);
1185 }
1186
1187 /** cache lookup of nameservers */
1188 static void
1189 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1190 {
1191         uint8_t* nm;
1192         int nmlabs;
1193         size_t nmlen;
1194         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1195                 return;
1196         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1197         free(nm);
1198 }
1199
1200 /** flush something from rrset and msg caches */
1201 static void
1202 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1203         uint16_t t, uint16_t c)
1204 {
1205         hashvalue_t h;
1206         struct query_info k;
1207         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1208         if(t == LDNS_RR_TYPE_SOA)
1209                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1210                         PACKED_RRSET_SOA_NEG);
1211         k.qname = nm;
1212         k.qname_len = nmlen;
1213         k.qtype = t;
1214         k.qclass = c;
1215         h = query_info_hash(&k, 0);
1216         slabhash_remove(worker->env.msg_cache, h, &k);
1217         if(t == LDNS_RR_TYPE_AAAA) {
1218                 /* for AAAA also flush dns64 bit_cd packet */
1219                 h = query_info_hash(&k, BIT_CD);
1220                 slabhash_remove(worker->env.msg_cache, h, &k);
1221         }
1222 }
1223
1224 /** flush a type */
1225 static void
1226 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1227 {
1228         uint8_t* nm;
1229         int nmlabs;
1230         size_t nmlen;
1231         char* arg2;
1232         uint16_t t;
1233         if(!find_arg2(ssl, arg, &arg2))
1234                 return;
1235         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1236                 return;
1237         t = sldns_get_rr_type_by_name(arg2);
1238         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1239
1240         free(nm);
1241         send_ok(ssl);
1242 }
1243
1244 /** flush statistics */
1245 static void
1246 do_flush_stats(SSL* ssl, struct worker* worker)
1247 {
1248         worker_stats_clear(worker);
1249         send_ok(ssl);
1250 }
1251
1252 /**
1253  * Local info for deletion functions
1254  */
1255 struct del_info {
1256         /** worker */
1257         struct worker* worker;
1258         /** name to delete */
1259         uint8_t* name;
1260         /** length */
1261         size_t len;
1262         /** labels */
1263         int labs;
1264         /** time to invalidate to */
1265         time_t expired;
1266         /** number of rrsets removed */
1267         size_t num_rrsets;
1268         /** number of msgs removed */
1269         size_t num_msgs;
1270         /** number of key entries removed */
1271         size_t num_keys;
1272         /** length of addr */
1273         socklen_t addrlen;
1274         /** socket address for host deletion */
1275         struct sockaddr_storage addr;
1276 };
1277
1278 /** callback to delete hosts in infra cache */
1279 static void
1280 infra_del_host(struct lruhash_entry* e, void* arg)
1281 {
1282         /* entry is locked */
1283         struct del_info* inf = (struct del_info*)arg;
1284         struct infra_key* k = (struct infra_key*)e->key;
1285         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1286                 struct infra_data* d = (struct infra_data*)e->data;
1287                 d->probedelay = 0;
1288                 d->timeout_A = 0;
1289                 d->timeout_AAAA = 0;
1290                 d->timeout_other = 0;
1291                 rtt_init(&d->rtt);
1292                 if(d->ttl > inf->expired) {
1293                         d->ttl = inf->expired;
1294                         inf->num_keys++;
1295                 }
1296         }
1297 }
1298
1299 /** flush infra cache */
1300 static void
1301 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1302 {
1303         struct sockaddr_storage addr;
1304         socklen_t len;
1305         struct del_info inf;
1306         if(strcmp(arg, "all") == 0) {
1307                 slabhash_clear(worker->env.infra_cache->hosts);
1308                 send_ok(ssl);
1309                 return;
1310         }
1311         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1312                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1313                 return;
1314         }
1315         /* delete all entries from cache */
1316         /* what we do is to set them all expired */
1317         inf.worker = worker;
1318         inf.name = 0;
1319         inf.len = 0;
1320         inf.labs = 0;
1321         inf.expired = *worker->env.now;
1322         inf.expired -= 3; /* handle 3 seconds skew between threads */
1323         inf.num_rrsets = 0;
1324         inf.num_msgs = 0;
1325         inf.num_keys = 0;
1326         inf.addrlen = len;
1327         memmove(&inf.addr, &addr, len);
1328         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1329                 &inf);
1330         send_ok(ssl);
1331 }
1332
1333 /** flush requestlist */
1334 static void
1335 do_flush_requestlist(SSL* ssl, struct worker* worker)
1336 {
1337         mesh_delete_all(worker->env.mesh);
1338         send_ok(ssl);
1339 }
1340
1341 /** callback to delete rrsets in a zone */
1342 static void
1343 zone_del_rrset(struct lruhash_entry* e, void* arg)
1344 {
1345         /* entry is locked */
1346         struct del_info* inf = (struct del_info*)arg;
1347         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1348         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1349                 struct packed_rrset_data* d =
1350                         (struct packed_rrset_data*)e->data;
1351                 if(d->ttl > inf->expired) {
1352                         d->ttl = inf->expired;
1353                         inf->num_rrsets++;
1354                 }
1355         }
1356 }
1357
1358 /** callback to delete messages in a zone */
1359 static void
1360 zone_del_msg(struct lruhash_entry* e, void* arg)
1361 {
1362         /* entry is locked */
1363         struct del_info* inf = (struct del_info*)arg;
1364         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1365         if(dname_subdomain_c(k->key.qname, inf->name)) {
1366                 struct reply_info* d = (struct reply_info*)e->data;
1367                 if(d->ttl > inf->expired) {
1368                         d->ttl = inf->expired;
1369                         inf->num_msgs++;
1370                 }
1371         }
1372 }
1373
1374 /** callback to delete keys in zone */
1375 static void
1376 zone_del_kcache(struct lruhash_entry* e, void* arg)
1377 {
1378         /* entry is locked */
1379         struct del_info* inf = (struct del_info*)arg;
1380         struct key_entry_key* k = (struct key_entry_key*)e->key;
1381         if(dname_subdomain_c(k->name, inf->name)) {
1382                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1383                 if(d->ttl > inf->expired) {
1384                         d->ttl = inf->expired;
1385                         inf->num_keys++;
1386                 }
1387         }
1388 }
1389
1390 /** remove all rrsets and keys from zone from cache */
1391 static void
1392 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1393 {
1394         uint8_t* nm;
1395         int nmlabs;
1396         size_t nmlen;
1397         struct del_info inf;
1398         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1399                 return;
1400         /* delete all RRs and key entries from zone */
1401         /* what we do is to set them all expired */
1402         inf.worker = worker;
1403         inf.name = nm;
1404         inf.len = nmlen;
1405         inf.labs = nmlabs;
1406         inf.expired = *worker->env.now;
1407         inf.expired -= 3; /* handle 3 seconds skew between threads */
1408         inf.num_rrsets = 0;
1409         inf.num_msgs = 0;
1410         inf.num_keys = 0;
1411         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1412                 &zone_del_rrset, &inf);
1413
1414         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1415
1416         /* and validator cache */
1417         if(worker->env.key_cache) {
1418                 slabhash_traverse(worker->env.key_cache->slab, 1,
1419                         &zone_del_kcache, &inf);
1420         }
1421
1422         free(nm);
1423
1424         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1425                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1426                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1427 }
1428
1429 /** callback to delete bogus rrsets */
1430 static void
1431 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1432 {
1433         /* entry is locked */
1434         struct del_info* inf = (struct del_info*)arg;
1435         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1436         if(d->security == sec_status_bogus) {
1437                 d->ttl = inf->expired;
1438                 inf->num_rrsets++;
1439         }
1440 }
1441
1442 /** callback to delete bogus messages */
1443 static void
1444 bogus_del_msg(struct lruhash_entry* e, void* arg)
1445 {
1446         /* entry is locked */
1447         struct del_info* inf = (struct del_info*)arg;
1448         struct reply_info* d = (struct reply_info*)e->data;
1449         if(d->security == sec_status_bogus) {
1450                 d->ttl = inf->expired;
1451                 inf->num_msgs++;
1452         }
1453 }
1454
1455 /** callback to delete bogus keys */
1456 static void
1457 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1458 {
1459         /* entry is locked */
1460         struct del_info* inf = (struct del_info*)arg;
1461         struct key_entry_data* d = (struct key_entry_data*)e->data;
1462         if(d->isbad) {
1463                 d->ttl = inf->expired;
1464                 inf->num_keys++;
1465         }
1466 }
1467
1468 /** remove all bogus rrsets, msgs and keys from cache */
1469 static void
1470 do_flush_bogus(SSL* ssl, struct worker* worker)
1471 {
1472         struct del_info inf;
1473         /* what we do is to set them all expired */
1474         inf.worker = worker;
1475         inf.expired = *worker->env.now;
1476         inf.expired -= 3; /* handle 3 seconds skew between threads */
1477         inf.num_rrsets = 0;
1478         inf.num_msgs = 0;
1479         inf.num_keys = 0;
1480         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1481                 &bogus_del_rrset, &inf);
1482
1483         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1484
1485         /* and validator cache */
1486         if(worker->env.key_cache) {
1487                 slabhash_traverse(worker->env.key_cache->slab, 1,
1488                         &bogus_del_kcache, &inf);
1489         }
1490
1491         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1492                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1493                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1494 }
1495
1496 /** callback to delete negative and servfail rrsets */
1497 static void
1498 negative_del_rrset(struct lruhash_entry* e, void* arg)
1499 {
1500         /* entry is locked */
1501         struct del_info* inf = (struct del_info*)arg;
1502         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1503         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1504         /* delete the parentside negative cache rrsets,
1505          * these are namerserver rrsets that failed lookup, rdata empty */
1506         if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 &&
1507                 d->rrsig_count == 0 && d->rr_len[0] == 0) {
1508                 d->ttl = inf->expired;
1509                 inf->num_rrsets++;
1510         }
1511 }
1512
1513 /** callback to delete negative and servfail messages */
1514 static void
1515 negative_del_msg(struct lruhash_entry* e, void* arg)
1516 {
1517         /* entry is locked */
1518         struct del_info* inf = (struct del_info*)arg;
1519         struct reply_info* d = (struct reply_info*)e->data;
1520         /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error
1521          * or NOERROR rcode with ANCOUNT==0: a NODATA answer */
1522         if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) {
1523                 d->ttl = inf->expired;
1524                 inf->num_msgs++;
1525         }
1526 }
1527
1528 /** callback to delete negative key entries */
1529 static void
1530 negative_del_kcache(struct lruhash_entry* e, void* arg)
1531 {
1532         /* entry is locked */
1533         struct del_info* inf = (struct del_info*)arg;
1534         struct key_entry_data* d = (struct key_entry_data*)e->data;
1535         /* could be bad because of lookup failure on the DS, DNSKEY, which
1536          * was nxdomain or servfail, and thus a result of negative lookups */
1537         if(d->isbad) {
1538                 d->ttl = inf->expired;
1539                 inf->num_keys++;
1540         }
1541 }
1542
1543 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */
1544 static void
1545 do_flush_negative(SSL* ssl, struct worker* worker)
1546 {
1547         struct del_info inf;
1548         /* what we do is to set them all expired */
1549         inf.worker = worker;
1550         inf.expired = *worker->env.now;
1551         inf.expired -= 3; /* handle 3 seconds skew between threads */
1552         inf.num_rrsets = 0;
1553         inf.num_msgs = 0;
1554         inf.num_keys = 0;
1555         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1556                 &negative_del_rrset, &inf);
1557
1558         slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
1559
1560         /* and validator cache */
1561         if(worker->env.key_cache) {
1562                 slabhash_traverse(worker->env.key_cache->slab, 1,
1563                         &negative_del_kcache, &inf);
1564         }
1565
1566         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1567                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1568                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1569 }
1570
1571 /** remove name rrset from cache */
1572 static void
1573 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1574 {
1575         uint8_t* nm;
1576         int nmlabs;
1577         size_t nmlen;
1578         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1579                 return;
1580         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1581         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1582         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1583         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1584         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1585         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1586         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1587         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1588         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1589         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1590
1591         free(nm);
1592         send_ok(ssl);
1593 }
1594
1595 /** printout a delegation point info */
1596 static int
1597 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1598         struct delegpt* dp)
1599 {
1600         char buf[257];
1601         struct delegpt_ns* ns;
1602         struct delegpt_addr* a;
1603         int f = 0;
1604         if(str) { /* print header for forward, stub */
1605                 char* c = sldns_wire2str_class(dclass);
1606                 dname_str(nm, buf);
1607                 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) {
1608                         free(c);
1609                         return 0;
1610                 }
1611                 free(c);
1612         }
1613         for(ns = dp->nslist; ns; ns = ns->next) {
1614                 dname_str(ns->name, buf);
1615                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1616                         return 0;
1617                 f = 1;
1618         }
1619         for(a = dp->target_list; a; a = a->next_target) {
1620                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1621                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1622                         return 0;
1623                 f = 1;
1624         }
1625         return ssl_printf(ssl, "\n");
1626 }
1627
1628
1629 /** print root forwards */
1630 static int
1631 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1632 {
1633         struct delegpt* dp;
1634         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1635         if(!dp)
1636                 return ssl_printf(ssl, "off (using root hints)\n");
1637         /* if dp is returned it must be the root */
1638         log_assert(query_dname_compare(dp->name, root)==0);
1639         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1640 }
1641
1642 /** parse args into delegpt */
1643 static struct delegpt*
1644 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1645 {
1646         /* parse args and add in */
1647         char* p = args;
1648         char* todo;
1649         struct delegpt* dp = delegpt_create_mlc(nm);
1650         struct sockaddr_storage addr;
1651         socklen_t addrlen;
1652         if(!dp) {
1653                 (void)ssl_printf(ssl, "error out of memory\n");
1654                 return NULL;
1655         }
1656         while(p) {
1657                 todo = p;
1658                 p = strchr(p, ' '); /* find next spot, if any */
1659                 if(p) {
1660                         *p++ = 0;       /* end this spot */
1661                         p = skipwhite(p); /* position at next spot */
1662                 }
1663                 /* parse address */
1664                 if(!extstrtoaddr(todo, &addr, &addrlen)) {
1665                         if(allow_names) {
1666                                 uint8_t* n = NULL;
1667                                 size_t ln;
1668                                 int lb;
1669                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1670                                         (void)ssl_printf(ssl, "error cannot "
1671                                                 "parse IP address or name "
1672                                                 "'%s'\n", todo);
1673                                         delegpt_free_mlc(dp);
1674                                         return NULL;
1675                                 }
1676                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1677                                         (void)ssl_printf(ssl, "error out of memory\n");
1678                                         free(n);
1679                                         delegpt_free_mlc(dp);
1680                                         return NULL;
1681                                 }
1682                                 free(n);
1683
1684                         } else {
1685                                 (void)ssl_printf(ssl, "error cannot parse"
1686                                         " IP address '%s'\n", todo);
1687                                 delegpt_free_mlc(dp);
1688                                 return NULL;
1689                         }
1690                 } else {
1691                         /* add address */
1692                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
1693                                 (void)ssl_printf(ssl, "error out of memory\n");
1694                                 delegpt_free_mlc(dp);
1695                                 return NULL;
1696                         }
1697                 }
1698         }
1699         dp->has_parent_side_NS = 1;
1700         return dp;
1701 }
1702
1703 /** do the status command */
1704 static void
1705 do_forward(SSL* ssl, struct worker* worker, char* args)
1706 {
1707         struct iter_forwards* fwd = worker->env.fwds;
1708         uint8_t* root = (uint8_t*)"\000";
1709         if(!fwd) {
1710                 (void)ssl_printf(ssl, "error: structure not allocated\n");
1711                 return;
1712         }
1713         if(args == NULL || args[0] == 0) {
1714                 (void)print_root_fwds(ssl, fwd, root);
1715                 return;
1716         }
1717         /* set root forwards for this thread. since we are in remote control
1718          * the actual mesh is not running, so we can freely edit it. */
1719         /* delete all the existing queries first */
1720         mesh_delete_all(worker->env.mesh);
1721         if(strcmp(args, "off") == 0) {
1722                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
1723         } else {
1724                 struct delegpt* dp;
1725                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
1726                         return;
1727                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1728                         (void)ssl_printf(ssl, "error out of memory\n");
1729                         return;
1730                 }
1731         }
1732         send_ok(ssl);
1733 }
1734
1735 static int
1736 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
1737         int* insecure, int* prime)
1738 {
1739         char* zonename;
1740         char* rest;
1741         size_t nmlen;
1742         int nmlabs;
1743         /* parse all -x args */
1744         while(args[0] == '+') {
1745                 if(!find_arg2(ssl, args, &rest))
1746                         return 0;
1747                 while(*(++args) != 0) {
1748                         if(*args == 'i' && insecure)
1749                                 *insecure = 1;
1750                         else if(*args == 'p' && prime)
1751                                 *prime = 1;
1752                         else {
1753                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
1754                                 return 0;
1755                         }
1756                 }
1757                 args = rest;
1758         }
1759         /* parse name */
1760         if(dp) {
1761                 if(!find_arg2(ssl, args, &rest))
1762                         return 0;
1763                 zonename = args;
1764                 args = rest;
1765         } else  zonename = args;
1766         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
1767                 return 0;
1768
1769         /* parse dp */
1770         if(dp) {
1771                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
1772                         free(*nm);
1773                         return 0;
1774                 }
1775         }
1776         return 1;
1777 }
1778
1779 /** do the forward_add command */
1780 static void
1781 do_forward_add(SSL* ssl, struct worker* worker, char* args)
1782 {
1783         struct iter_forwards* fwd = worker->env.fwds;
1784         int insecure = 0;
1785         uint8_t* nm = NULL;
1786         struct delegpt* dp = NULL;
1787         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
1788                 return;
1789         if(insecure && worker->env.anchors) {
1790                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1791                         nm)) {
1792                         (void)ssl_printf(ssl, "error out of memory\n");
1793                         delegpt_free_mlc(dp);
1794                         free(nm);
1795                         return;
1796                 }
1797         }
1798         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1799                 (void)ssl_printf(ssl, "error out of memory\n");
1800                 free(nm);
1801                 return;
1802         }
1803         free(nm);
1804         send_ok(ssl);
1805 }
1806
1807 /** do the forward_remove command */
1808 static void
1809 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
1810 {
1811         struct iter_forwards* fwd = worker->env.fwds;
1812         int insecure = 0;
1813         uint8_t* nm = NULL;
1814         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1815                 return;
1816         if(insecure && worker->env.anchors)
1817                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1818                         nm);
1819         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
1820         free(nm);
1821         send_ok(ssl);
1822 }
1823
1824 /** do the stub_add command */
1825 static void
1826 do_stub_add(SSL* ssl, struct worker* worker, char* args)
1827 {
1828         struct iter_forwards* fwd = worker->env.fwds;
1829         int insecure = 0, prime = 0;
1830         uint8_t* nm = NULL;
1831         struct delegpt* dp = NULL;
1832         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
1833                 return;
1834         if(insecure && worker->env.anchors) {
1835                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1836                         nm)) {
1837                         (void)ssl_printf(ssl, "error out of memory\n");
1838                         delegpt_free_mlc(dp);
1839                         free(nm);
1840                         return;
1841                 }
1842         }
1843         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
1844                 if(insecure && worker->env.anchors)
1845                         anchors_delete_insecure(worker->env.anchors,
1846                                 LDNS_RR_CLASS_IN, nm);
1847                 (void)ssl_printf(ssl, "error out of memory\n");
1848                 delegpt_free_mlc(dp);
1849                 free(nm);
1850                 return;
1851         }
1852         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
1853                 (void)ssl_printf(ssl, "error out of memory\n");
1854                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1855                 if(insecure && worker->env.anchors)
1856                         anchors_delete_insecure(worker->env.anchors,
1857                                 LDNS_RR_CLASS_IN, nm);
1858                 free(nm);
1859                 return;
1860         }
1861         free(nm);
1862         send_ok(ssl);
1863 }
1864
1865 /** do the stub_remove command */
1866 static void
1867 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
1868 {
1869         struct iter_forwards* fwd = worker->env.fwds;
1870         int insecure = 0;
1871         uint8_t* nm = NULL;
1872         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1873                 return;
1874         if(insecure && worker->env.anchors)
1875                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1876                         nm);
1877         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1878         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
1879         free(nm);
1880         send_ok(ssl);
1881 }
1882
1883 /** do the insecure_add command */
1884 static void
1885 do_insecure_add(SSL* ssl, struct worker* worker, char* arg)
1886 {
1887         size_t nmlen;
1888         int nmlabs;
1889         uint8_t* nm = NULL;
1890         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1891                 return;
1892         if(worker->env.anchors) {
1893                 if(!anchors_add_insecure(worker->env.anchors,
1894                         LDNS_RR_CLASS_IN, nm)) {
1895                         (void)ssl_printf(ssl, "error out of memory\n");
1896                         free(nm);
1897                         return;
1898                 }
1899         }
1900         free(nm);
1901         send_ok(ssl);
1902 }
1903
1904 /** do the insecure_remove command */
1905 static void
1906 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg)
1907 {
1908         size_t nmlen;
1909         int nmlabs;
1910         uint8_t* nm = NULL;
1911         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1912                 return;
1913         if(worker->env.anchors)
1914                 anchors_delete_insecure(worker->env.anchors,
1915                         LDNS_RR_CLASS_IN, nm);
1916         free(nm);
1917         send_ok(ssl);
1918 }
1919
1920 static void
1921 do_insecure_list(SSL* ssl, struct worker* worker)
1922 {
1923         char buf[257];
1924         struct trust_anchor* a;
1925         if(worker->env.anchors) {
1926                 RBTREE_FOR(a, struct trust_anchor*, worker->env.anchors->tree) {
1927                         if(a->numDS == 0 && a->numDNSKEY == 0) {
1928                                 dname_str(a->name, buf);
1929                                 ssl_printf(ssl, "%s\n", buf);
1930                         }
1931                 }
1932         }
1933 }
1934
1935 /** do the status command */
1936 static void
1937 do_status(SSL* ssl, struct worker* worker)
1938 {
1939         int i;
1940         time_t uptime;
1941         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
1942                 return;
1943         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
1944                 return;
1945         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
1946                 return;
1947         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
1948                 return;
1949         for(i=0; i<worker->daemon->mods.num; i++) {
1950                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
1951                         return;
1952         }
1953         if(!ssl_printf(ssl, " ]\n"))
1954                 return;
1955         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
1956         if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
1957                 return;
1958         if(!ssl_printf(ssl, "options:%s%s\n" ,
1959                 (worker->daemon->reuseport?" reuseport":""),
1960                 (worker->daemon->rc->accept_list?" control(ssl)":"")))
1961                 return;
1962         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
1963                 (int)getpid()))
1964                 return;
1965 }
1966
1967 /** get age for the mesh state */
1968 static void
1969 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
1970         struct module_env* env)
1971 {
1972         if(m->reply_list) {
1973                 struct timeval d;
1974                 struct mesh_reply* r = m->reply_list;
1975                 /* last reply is the oldest */
1976                 while(r && r->next)
1977                         r = r->next;
1978                 timeval_subtract(&d, env->now_tv, &r->start_time);
1979                 snprintf(buf, len, ARG_LL "d.%6.6d",
1980                         (long long)d.tv_sec, (int)d.tv_usec);
1981         } else {
1982                 snprintf(buf, len, "-");
1983         }
1984 }
1985
1986 /** get status of a mesh state */
1987 static void
1988 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
1989         char* buf, size_t len)
1990 {
1991         enum module_ext_state s = m->s.ext_state[m->s.curmod];
1992         const char *modname = mesh->mods.mod[m->s.curmod]->name;
1993         size_t l;
1994         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
1995                 m->s.minfo[m->s.curmod]) {
1996                 /* break into iterator to find out who its waiting for */
1997                 struct iter_qstate* qstate = (struct iter_qstate*)
1998                         m->s.minfo[m->s.curmod];
1999                 struct outbound_list* ol = &qstate->outlist;
2000                 struct outbound_entry* e;
2001                 snprintf(buf, len, "%s wait for", modname);
2002                 l = strlen(buf);
2003                 buf += l; len -= l;
2004                 if(ol->first == NULL)
2005                         snprintf(buf, len, " (empty_list)");
2006                 for(e = ol->first; e; e = e->next) {
2007                         snprintf(buf, len, " ");
2008                         l = strlen(buf);
2009                         buf += l; len -= l;
2010                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
2011                                 buf, len);
2012                         l = strlen(buf);
2013                         buf += l; len -= l;
2014                 }
2015         } else if(s == module_wait_subquery) {
2016                 /* look in subs from mesh state to see what */
2017                 char nm[257];
2018                 struct mesh_state_ref* sub;
2019                 snprintf(buf, len, "%s wants", modname);
2020                 l = strlen(buf);
2021                 buf += l; len -= l;
2022                 if(m->sub_set.count == 0)
2023                         snprintf(buf, len, " (empty_list)");
2024                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
2025                         char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype);
2026                         char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
2027                         dname_str(sub->s->s.qinfo.qname, nm);
2028                         snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"),
2029                                 (c?c:"CLASS??"), nm);
2030                         l = strlen(buf);
2031                         buf += l; len -= l;
2032                         free(t);
2033                         free(c);
2034                 }
2035         } else {
2036                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
2037         }
2038 }
2039
2040 /** do the dump_requestlist command */
2041 static void
2042 do_dump_requestlist(SSL* ssl, struct worker* worker)
2043 {
2044         struct mesh_area* mesh;
2045         struct mesh_state* m;
2046         int num = 0;
2047         char buf[257];
2048         char timebuf[32];
2049         char statbuf[10240];
2050         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
2051                 return;
2052         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
2053                 return;
2054         /* show worker mesh contents */
2055         mesh = worker->env.mesh;
2056         if(!mesh) return;
2057         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
2058                 char* t = sldns_wire2str_type(m->s.qinfo.qtype);
2059                 char* c = sldns_wire2str_class(m->s.qinfo.qclass);
2060                 dname_str(m->s.qinfo.qname, buf);
2061                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
2062                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
2063                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
2064                         num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
2065                         statbuf)) {
2066                         free(t);
2067                         free(c);
2068                         return;
2069                 }
2070                 num++;
2071                 free(t);
2072                 free(c);
2073         }
2074 }
2075
2076 /** structure for argument data for dump infra host */
2077 struct infra_arg {
2078         /** the infra cache */
2079         struct infra_cache* infra;
2080         /** the SSL connection */
2081         SSL* ssl;
2082         /** the time now */
2083         time_t now;
2084         /** ssl failure? stop writing and skip the rest.  If the tcp
2085          * connection is broken, and writes fail, we then stop writing. */
2086         int ssl_failed;
2087 };
2088
2089 /** callback for every host element in the infra cache */
2090 static void
2091 dump_infra_host(struct lruhash_entry* e, void* arg)
2092 {
2093         struct infra_arg* a = (struct infra_arg*)arg;
2094         struct infra_key* k = (struct infra_key*)e->key;
2095         struct infra_data* d = (struct infra_data*)e->data;
2096         char ip_str[1024];
2097         char name[257];
2098         if(a->ssl_failed)
2099                 return;
2100         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
2101         dname_str(k->zonename, name);
2102         /* skip expired stuff (only backed off) */
2103         if(d->ttl < a->now) {
2104                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
2105                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
2106                                 name, d->rtt.rto))  {
2107                                 a->ssl_failed = 1;
2108                                 return;
2109                         }
2110                 }
2111                 return;
2112         }
2113         if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d "
2114                 "tA %d tAAAA %d tother %d "
2115                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
2116                 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now),
2117                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
2118                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
2119                 (int)d->edns_lame_known, (int)d->edns_version,
2120                 (int)(a->now<d->probedelay?(d->probedelay - a->now):0),
2121                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
2122                 (int)d->lame_other)) {
2123                 a->ssl_failed = 1;
2124                 return;
2125         }
2126 }
2127
2128 /** do the dump_infra command */
2129 static void
2130 do_dump_infra(SSL* ssl, struct worker* worker)
2131 {
2132         struct infra_arg arg;
2133         arg.infra = worker->env.infra_cache;
2134         arg.ssl = ssl;
2135         arg.now = *worker->env.now;
2136         arg.ssl_failed = 0;
2137         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
2138 }
2139
2140 /** do the log_reopen command */
2141 static void
2142 do_log_reopen(SSL* ssl, struct worker* worker)
2143 {
2144         struct config_file* cfg = worker->env.cfg;
2145         send_ok(ssl);
2146         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
2147 }
2148
2149 /** do the set_option command */
2150 static void
2151 do_set_option(SSL* ssl, struct worker* worker, char* arg)
2152 {
2153         char* arg2;
2154         if(!find_arg2(ssl, arg, &arg2))
2155                 return;
2156         if(!config_set_option(worker->env.cfg, arg, arg2)) {
2157                 (void)ssl_printf(ssl, "error setting option\n");
2158                 return;
2159         }
2160         send_ok(ssl);
2161 }
2162
2163 /* routine to printout option values over SSL */
2164 void remote_get_opt_ssl(char* line, void* arg)
2165 {
2166         SSL* ssl = (SSL*)arg;
2167         (void)ssl_printf(ssl, "%s\n", line);
2168 }
2169
2170 /** do the get_option command */
2171 static void
2172 do_get_option(SSL* ssl, struct worker* worker, char* arg)
2173 {
2174         int r;
2175         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
2176         if(!r) {
2177                 (void)ssl_printf(ssl, "error unknown option\n");
2178                 return;
2179         }
2180 }
2181
2182 /** do the list_forwards command */
2183 static void
2184 do_list_forwards(SSL* ssl, struct worker* worker)
2185 {
2186         /* since its a per-worker structure no locks needed */
2187         struct iter_forwards* fwds = worker->env.fwds;
2188         struct iter_forward_zone* z;
2189         struct trust_anchor* a;
2190         int insecure;
2191         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
2192                 if(!z->dp) continue; /* skip empty marker for stub */
2193
2194                 /* see if it is insecure */
2195                 insecure = 0;
2196                 if(worker->env.anchors &&
2197                         (a=anchor_find(worker->env.anchors, z->name,
2198                         z->namelabs, z->namelen,  z->dclass))) {
2199                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2200                                 insecure = 1;
2201                         lock_basic_unlock(&a->lock);
2202                 }
2203
2204                 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
2205                         z->name, z->dclass, z->dp))
2206                         return;
2207         }
2208 }
2209
2210 /** do the list_stubs command */
2211 static void
2212 do_list_stubs(SSL* ssl, struct worker* worker)
2213 {
2214         struct iter_hints_stub* z;
2215         struct trust_anchor* a;
2216         int insecure;
2217         char str[32];
2218         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
2219
2220                 /* see if it is insecure */
2221                 insecure = 0;
2222                 if(worker->env.anchors &&
2223                         (a=anchor_find(worker->env.anchors, z->node.name,
2224                         z->node.labs, z->node.len,  z->node.dclass))) {
2225                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2226                                 insecure = 1;
2227                         lock_basic_unlock(&a->lock);
2228                 }
2229
2230                 snprintf(str, sizeof(str), "stub %sprime%s",
2231                         (z->noprime?"no":""), (insecure?" +i":""));
2232                 if(!ssl_print_name_dp(ssl, str, z->node.name,
2233                         z->node.dclass, z->dp))
2234                         return;
2235         }
2236 }
2237
2238 /** do the list_local_zones command */
2239 static void
2240 do_list_local_zones(SSL* ssl, struct worker* worker)
2241 {
2242         struct local_zones* zones = worker->daemon->local_zones;
2243         struct local_zone* z;
2244         char buf[257];
2245         lock_rw_rdlock(&zones->lock);
2246         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2247                 lock_rw_rdlock(&z->lock);
2248                 dname_str(z->name, buf);
2249                 if(!ssl_printf(ssl, "%s %s\n", buf,
2250                         local_zone_type2str(z->type))) {
2251                         /* failure to print */
2252                         lock_rw_unlock(&z->lock);
2253                         lock_rw_unlock(&zones->lock);
2254                         return;
2255                 }
2256                 lock_rw_unlock(&z->lock);
2257         }
2258         lock_rw_unlock(&zones->lock);
2259 }
2260
2261 /** do the list_local_data command */
2262 static void
2263 do_list_local_data(SSL* ssl, struct worker* worker)
2264 {
2265         struct local_zones* zones = worker->daemon->local_zones;
2266         struct local_zone* z;
2267         struct local_data* d;
2268         struct local_rrset* p;
2269         char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer);
2270         size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer);
2271         lock_rw_rdlock(&zones->lock);
2272         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2273                 lock_rw_rdlock(&z->lock);
2274                 RBTREE_FOR(d, struct local_data*, &z->data) {
2275                         for(p = d->rrsets; p; p = p->next) {
2276                                 struct packed_rrset_data* d =
2277                                         (struct packed_rrset_data*)p->rrset->entry.data;
2278                                 size_t i;
2279                                 for(i=0; i<d->count + d->rrsig_count; i++) {
2280                                         if(!packed_rr_to_string(p->rrset, i,
2281                                                 0, s, slen)) {
2282                                                 if(!ssl_printf(ssl, "BADRR\n")) {
2283                                                         lock_rw_unlock(&z->lock);
2284                                                         lock_rw_unlock(&zones->lock);
2285                                                         return;
2286                                                 }
2287                                         }
2288                                         if(!ssl_printf(ssl, "%s\n", s)) {
2289                                                 lock_rw_unlock(&z->lock);
2290                                                 lock_rw_unlock(&zones->lock);
2291                                                 return;
2292                                         }
2293                                 }
2294                         }
2295                 }
2296                 lock_rw_unlock(&z->lock);
2297         }
2298         lock_rw_unlock(&zones->lock);
2299 }
2300
2301 /** struct for user arg ratelimit list */
2302 struct ratelimit_list_arg {
2303         /** the infra cache */
2304         struct infra_cache* infra;
2305         /** the SSL to print to */
2306         SSL* ssl;
2307         /** all or only ratelimited */
2308         int all;
2309         /** current time */
2310         time_t now;
2311 };
2312
2313 /** list items in the ratelimit table */
2314 static void
2315 rate_list(struct lruhash_entry* e, void* arg)
2316 {
2317         struct ratelimit_list_arg* a = (struct ratelimit_list_arg*)arg;
2318         struct rate_key* k = (struct rate_key*)e->key;
2319         struct rate_data* d = (struct rate_data*)e->data;
2320         char buf[257];
2321         int lim = infra_find_ratelimit(a->infra, k->name, k->namelen);
2322         int max = infra_rate_max(d, a->now);
2323         if(a->all == 0) {
2324                 if(max < lim)
2325                         return;
2326         }
2327         dname_str(k->name, buf);
2328         ssl_printf(a->ssl, "%s %d limit %d\n", buf, max, lim);
2329 }
2330
2331 /** do the ratelimit_list command */
2332 static void
2333 do_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2334 {
2335         struct ratelimit_list_arg a;
2336         a.all = 0;
2337         a.infra = worker->env.infra_cache;
2338         a.now = *worker->env.now;
2339         a.ssl = ssl;
2340         arg = skipwhite(arg);
2341         if(strcmp(arg, "+a") == 0)
2342                 a.all = 1;
2343         if(a.infra->domain_rates==NULL ||
2344                 (a.all == 0 && infra_dp_ratelimit == 0))
2345                 return;
2346         slabhash_traverse(a.infra->domain_rates, 0, rate_list, &a);
2347 }
2348
2349 /** tell other processes to execute the command */
2350 static void
2351 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
2352 {
2353         int i;
2354         if(!cmd || !ssl)
2355                 return;
2356         /* skip i=0 which is me */
2357         for(i=1; i<rc->worker->daemon->num; i++) {
2358                 worker_send_cmd(rc->worker->daemon->workers[i],
2359                         worker_cmd_remote);
2360                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
2361                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
2362                         ssl_printf(ssl, "error could not distribute cmd\n");
2363                         return;
2364                 }
2365         }
2366 }
2367
2368 /** check for name with end-of-string, space or tab after it */
2369 static int
2370 cmdcmp(char* p, const char* cmd, size_t len)
2371 {
2372         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
2373 }
2374
2375 /** execute a remote control command */
2376 static void
2377 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
2378         struct worker* worker)
2379 {
2380         char* p = skipwhite(cmd);
2381         /* compare command */
2382         if(cmdcmp(p, "stop", 4)) {
2383                 do_stop(ssl, rc);
2384                 return;
2385         } else if(cmdcmp(p, "reload", 6)) {
2386                 do_reload(ssl, rc);
2387                 return;
2388         } else if(cmdcmp(p, "stats_noreset", 13)) {
2389                 do_stats(ssl, rc, 0);
2390                 return;
2391         } else if(cmdcmp(p, "stats", 5)) {
2392                 do_stats(ssl, rc, 1);
2393                 return;
2394         } else if(cmdcmp(p, "status", 6)) {
2395                 do_status(ssl, worker);
2396                 return;
2397         } else if(cmdcmp(p, "dump_cache", 10)) {
2398                 (void)dump_cache(ssl, worker);
2399                 return;
2400         } else if(cmdcmp(p, "load_cache", 10)) {
2401                 if(load_cache(ssl, worker)) send_ok(ssl);
2402                 return;
2403         } else if(cmdcmp(p, "list_forwards", 13)) {
2404                 do_list_forwards(ssl, worker);
2405                 return;
2406         } else if(cmdcmp(p, "list_stubs", 10)) {
2407                 do_list_stubs(ssl, worker);
2408                 return;
2409         } else if(cmdcmp(p, "list_insecure", 13)) {
2410                 do_insecure_list(ssl, worker);
2411                 return;
2412         } else if(cmdcmp(p, "list_local_zones", 16)) {
2413                 do_list_local_zones(ssl, worker);
2414                 return;
2415         } else if(cmdcmp(p, "list_local_data", 15)) {
2416                 do_list_local_data(ssl, worker);
2417                 return;
2418         } else if(cmdcmp(p, "ratelimit_list", 14)) {
2419                 do_ratelimit_list(ssl, worker, p+14);
2420                 return;
2421         } else if(cmdcmp(p, "stub_add", 8)) {
2422                 /* must always distribute this cmd */
2423                 if(rc) distribute_cmd(rc, ssl, cmd);
2424                 do_stub_add(ssl, worker, skipwhite(p+8));
2425                 return;
2426         } else if(cmdcmp(p, "stub_remove", 11)) {
2427                 /* must always distribute this cmd */
2428                 if(rc) distribute_cmd(rc, ssl, cmd);
2429                 do_stub_remove(ssl, worker, skipwhite(p+11));
2430                 return;
2431         } else if(cmdcmp(p, "forward_add", 11)) {
2432                 /* must always distribute this cmd */
2433                 if(rc) distribute_cmd(rc, ssl, cmd);
2434                 do_forward_add(ssl, worker, skipwhite(p+11));
2435                 return;
2436         } else if(cmdcmp(p, "forward_remove", 14)) {
2437                 /* must always distribute this cmd */
2438                 if(rc) distribute_cmd(rc, ssl, cmd);
2439                 do_forward_remove(ssl, worker, skipwhite(p+14));
2440                 return;
2441         } else if(cmdcmp(p, "insecure_add", 12)) {
2442                 /* must always distribute this cmd */
2443                 if(rc) distribute_cmd(rc, ssl, cmd);
2444                 do_insecure_add(ssl, worker, skipwhite(p+12));
2445                 return;
2446         } else if(cmdcmp(p, "insecure_remove", 15)) {
2447                 /* must always distribute this cmd */
2448                 if(rc) distribute_cmd(rc, ssl, cmd);
2449                 do_insecure_remove(ssl, worker, skipwhite(p+15));
2450                 return;
2451         } else if(cmdcmp(p, "forward", 7)) {
2452                 /* must always distribute this cmd */
2453                 if(rc) distribute_cmd(rc, ssl, cmd);
2454                 do_forward(ssl, worker, skipwhite(p+7));
2455                 return;
2456         } else if(cmdcmp(p, "flush_stats", 11)) {
2457                 /* must always distribute this cmd */
2458                 if(rc) distribute_cmd(rc, ssl, cmd);
2459                 do_flush_stats(ssl, worker);
2460                 return;
2461         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2462                 /* must always distribute this cmd */
2463                 if(rc) distribute_cmd(rc, ssl, cmd);
2464                 do_flush_requestlist(ssl, worker);
2465                 return;
2466         } else if(cmdcmp(p, "lookup", 6)) {
2467                 do_lookup(ssl, worker, skipwhite(p+6));
2468                 return;
2469         }
2470
2471 #ifdef THREADS_DISABLED
2472         /* other processes must execute the command as well */
2473         /* commands that should not be distributed, returned above. */
2474         if(rc) { /* only if this thread is the master (rc) thread */
2475                 /* done before the code below, which may split the string */
2476                 distribute_cmd(rc, ssl, cmd);
2477         }
2478 #endif
2479         if(cmdcmp(p, "verbosity", 9)) {
2480                 do_verbosity(ssl, skipwhite(p+9));
2481         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2482                 do_zone_remove(ssl, worker, skipwhite(p+17));
2483         } else if(cmdcmp(p, "local_zone", 10)) {
2484                 do_zone_add(ssl, worker, skipwhite(p+10));
2485         } else if(cmdcmp(p, "local_data_remove", 17)) {
2486                 do_data_remove(ssl, worker, skipwhite(p+17));
2487         } else if(cmdcmp(p, "local_data", 10)) {
2488                 do_data_add(ssl, worker, skipwhite(p+10));
2489         } else if(cmdcmp(p, "flush_zone", 10)) {
2490                 do_flush_zone(ssl, worker, skipwhite(p+10));
2491         } else if(cmdcmp(p, "flush_type", 10)) {
2492                 do_flush_type(ssl, worker, skipwhite(p+10));
2493         } else if(cmdcmp(p, "flush_infra", 11)) {
2494                 do_flush_infra(ssl, worker, skipwhite(p+11));
2495         } else if(cmdcmp(p, "flush", 5)) {
2496                 do_flush_name(ssl, worker, skipwhite(p+5));
2497         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2498                 do_dump_requestlist(ssl, worker);
2499         } else if(cmdcmp(p, "dump_infra", 10)) {
2500                 do_dump_infra(ssl, worker);
2501         } else if(cmdcmp(p, "log_reopen", 10)) {
2502                 do_log_reopen(ssl, worker);
2503         } else if(cmdcmp(p, "set_option", 10)) {
2504                 do_set_option(ssl, worker, skipwhite(p+10));
2505         } else if(cmdcmp(p, "get_option", 10)) {
2506                 do_get_option(ssl, worker, skipwhite(p+10));
2507         } else if(cmdcmp(p, "flush_bogus", 11)) {
2508                 do_flush_bogus(ssl, worker);
2509         } else if(cmdcmp(p, "flush_negative", 14)) {
2510                 do_flush_negative(ssl, worker);
2511         } else {
2512                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2513         }
2514 }
2515
2516 void
2517 daemon_remote_exec(struct worker* worker)
2518 {
2519         /* read the cmd string */
2520         uint8_t* msg = NULL;
2521         uint32_t len = 0;
2522         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2523                 log_err("daemon_remote_exec: tube_read_msg failed");
2524                 return;
2525         }
2526         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2527         execute_cmd(NULL, NULL, (char*)msg, worker);
2528         free(msg);
2529 }
2530
2531 /** handle remote control request */
2532 static void
2533 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2534 {
2535         int r;
2536         char pre[10];
2537         char magic[7];
2538         char buf[1024];
2539 #ifdef USE_WINSOCK
2540         /* makes it possible to set the socket blocking again. */
2541         /* basically removes it from winsock_event ... */
2542         WSAEventSelect(s->c->fd, NULL, 0);
2543 #endif
2544         fd_set_block(s->c->fd);
2545
2546         /* try to read magic UBCT[version]_space_ string */
2547         ERR_clear_error();
2548         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2549                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2550                         return;
2551                 log_crypto_err("could not SSL_read");
2552                 return;
2553         }
2554         magic[6] = 0;
2555         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2556                 verbose(VERB_QUERY, "control connection has bad magic string");
2557                 /* probably wrong tool connected, ignore it completely */
2558                 return;
2559         }
2560
2561         /* read the command line */
2562         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2563                 return;
2564         }
2565         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
2566         if(strcmp(magic, pre) != 0) {
2567                 verbose(VERB_QUERY, "control connection had bad "
2568                         "version %s, cmd: %s", magic, buf);
2569                 ssl_printf(ssl, "error version mismatch\n");
2570                 return;
2571         }
2572         verbose(VERB_DETAIL, "control cmd: %s", buf);
2573
2574         /* figure out what to do */
2575         execute_cmd(rc, ssl, buf, rc->worker);
2576 }
2577
2578 int remote_control_callback(struct comm_point* c, void* arg, int err,
2579         struct comm_reply* ATTR_UNUSED(rep))
2580 {
2581         struct rc_state* s = (struct rc_state*)arg;
2582         struct daemon_remote* rc = s->rc;
2583         int r;
2584         if(err != NETEVENT_NOERROR) {
2585                 if(err==NETEVENT_TIMEOUT)
2586                         log_err("remote control timed out");
2587                 clean_point(rc, s);
2588                 return 0;
2589         }
2590         /* (continue to) setup the SSL connection */
2591         ERR_clear_error();
2592         r = SSL_do_handshake(s->ssl);
2593         if(r != 1) {
2594                 int r2 = SSL_get_error(s->ssl, r);
2595                 if(r2 == SSL_ERROR_WANT_READ) {
2596                         if(s->shake_state == rc_hs_read) {
2597                                 /* try again later */
2598                                 return 0;
2599                         }
2600                         s->shake_state = rc_hs_read;
2601                         comm_point_listen_for_rw(c, 1, 0);
2602                         return 0;
2603                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
2604                         if(s->shake_state == rc_hs_write) {
2605                                 /* try again later */
2606                                 return 0;
2607                         }
2608                         s->shake_state = rc_hs_write;
2609                         comm_point_listen_for_rw(c, 0, 1);
2610                         return 0;
2611                 } else {
2612                         if(r == 0)
2613                                 log_err("remote control connection closed prematurely");
2614                         log_addr(1, "failed connection from",
2615                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
2616                         log_crypto_err("remote control failed ssl");
2617                         clean_point(rc, s);
2618                         return 0;
2619                 }
2620         }
2621         s->shake_state = rc_none;
2622
2623         /* once handshake has completed, check authentication */
2624         if (!rc->use_cert) {
2625                 verbose(VERB_ALGO, "unauthenticated remote control connection");
2626         } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
2627                 X509* x = SSL_get_peer_certificate(s->ssl);
2628                 if(!x) {
2629                         verbose(VERB_DETAIL, "remote control connection "
2630                                 "provided no client certificate");
2631                         clean_point(rc, s);
2632                         return 0;
2633                 }
2634                 verbose(VERB_ALGO, "remote control connection authenticated");
2635                 X509_free(x);
2636         } else {
2637                 verbose(VERB_DETAIL, "remote control connection failed to "
2638                         "authenticate with client certificate");
2639                 clean_point(rc, s);
2640                 return 0;
2641         }
2642
2643         /* if OK start to actually handle the request */
2644         handle_req(rc, s, s->ssl);
2645
2646         verbose(VERB_ALGO, "remote control operation completed");
2647         clean_point(rc, s);
2648         return 0;
2649 }