contrib/unbound/daemon/remote.c

   1 /*
   2  * daemon/remote.c - remote control for the unbound daemon.
   3  *
   4  * Copyright (c) 2008, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains the remote control functionality for the daemon.
  40  * The remote control can be performed using either the commandline
  41  * unbound-control tool, or a TLS capable web browser.
  42  * The channel is secured using TLSv1, and certificates.
  43  * Both the server and the client(control tool) have their own keys.
  44  */
  45 #include "config.h"
  46 #ifdef HAVE_OPENSSL_ERR_H
  47 #include <openssl/err.h>
  48 #endif
  49 #ifdef HAVE_OPENSSL_DH_H
  50 #include <openssl/dh.h>
  51 #endif
  52 #ifdef HAVE_OPENSSL_BN_H
  53 #include <openssl/bn.h>
  54 #endif
  55
  56 #include <ctype.h>
  57 #include "daemon/remote.h"
  58 #include "daemon/worker.h"
  59 #include "daemon/daemon.h"
  60 #include "daemon/stats.h"
  61 #include "daemon/cachedump.h"
  62 #include "util/log.h"
  63 #include "util/config_file.h"
  64 #include "util/net_help.h"
  65 #include "util/module.h"
  66 #include "services/listen_dnsport.h"
  67 #include "services/cache/rrset.h"
  68 #include "services/cache/infra.h"
  69 #include "services/mesh.h"
  70 #include "services/localzone.h"
  71 #include "util/storage/slabhash.h"
  72 #include "util/fptr_wlist.h"
  73 #include "util/data/dname.h"
  74 #include "validator/validator.h"
  75 #include "validator/val_kcache.h"
  76 #include "validator/val_kentry.h"
  77 #include "validator/val_anchor.h"
  78 #include "iterator/iterator.h"
  79 #include "iterator/iter_fwd.h"
  80 #include "iterator/iter_hints.h"
  81 #include "iterator/iter_delegpt.h"
  82 #include "services/outbound_list.h"
  83 #include "services/outside_network.h"
  84 #include "sldns/str2wire.h"
  85 #include "sldns/parseutil.h"
  86 #include "sldns/wire2str.h"
  87 #include "sldns/sbuffer.h"
  88
  89 #ifdef HAVE_SYS_TYPES_H
  90 #  include <sys/types.h>
  91 #endif
  92 #ifdef HAVE_SYS_STAT_H
  93 #include <sys/stat.h>
  94 #endif
  95 #ifdef HAVE_NETDB_H
  96 #include <netdb.h>
  97 #endif
  98
  99 /* just for portability */
 100 #ifdef SQ
 101 #undef SQ
 102 #endif
 103
 104 /** what to put on statistics lines between var and value, ": " or "=" */
 105 #define SQ "="
 106 /** if true, inhibits a lot of =0 lines from the stats output */
 107 static const int inhibit_zero = 1;
 108
 109 /** subtract timers and the values do not overflow or become negative */
 110 static void
 111 timeval_subtract(struct timeval* d, const struct timeval* end,
 112         const struct timeval* start)
 113 {
 114 #ifndef S_SPLINT_S
 115         time_t end_usec = end->tv_usec;
 116         d->tv_sec = end->tv_sec - start->tv_sec;
 117         if(end_usec < start->tv_usec) {
 118                 end_usec += 1000000;
 119                 d->tv_sec--;
 120         }
 121         d->tv_usec = end_usec - start->tv_usec;
 122 #endif
 123 }
 124
 125 /** divide sum of timers to get average */
 126 static void
 127 timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
 128 {
 129 #ifndef S_SPLINT_S
 130         size_t leftover;
 131         if(d == 0) {
 132                 avg->tv_sec = 0;
 133                 avg->tv_usec = 0;
 134                 return;
 135         }
 136         avg->tv_sec = sum->tv_sec / d;
 137         avg->tv_usec = sum->tv_usec / d;
 138         /* handle fraction from seconds divide */
 139         leftover = sum->tv_sec - avg->tv_sec*d;
 140         avg->tv_usec += (leftover*1000000)/d;
 141 #endif
 142 }
 143
 144 /*
 145  * The following function was generated using the openssl utility, using
 146  * the command : "openssl dhparam -C 2048"
 147  * (some openssl versions reject DH that is 'too small', eg. 512).
 148  */
 149 #ifndef S_SPLINT_S
 150 static DH *get_dh2048(void)
 151 {
 152         static unsigned char dh2048_p[]={
 153                 0xE7,0x36,0x28,0x3B,0xE4,0xC3,0x32,0x1C,0x01,0xC3,0x67,0xD6,
 154                 0xF5,0xF3,0xDA,0xDC,0x71,0xC0,0x42,0x8B,0xE6,0xEB,0x8D,0x80,
 155                 0x35,0x7F,0x09,0x45,0x30,0xE5,0xB2,0x92,0x81,0x3F,0x08,0xCD,
 156                 0x36,0x5E,0x19,0x83,0x62,0xCC,0xAE,0x9B,0x81,0x66,0x24,0xEE,
 157                 0x16,0x6F,0xA9,0x9E,0xF4,0x82,0x1B,0xDD,0x46,0xC7,0x33,0x5D,
 158                 0xF4,0xCA,0xE6,0x8F,0xFC,0xD4,0xD8,0x58,0x94,0x24,0x5D,0xFF,
 159                 0x0A,0xE8,0xEF,0x3D,0xCE,0xBB,0x50,0x94,0xE0,0x5F,0xE8,0x41,
 160                 0xC3,0x35,0x30,0x37,0xD5,0xCB,0x8F,0x3D,0x95,0x15,0x1A,0x77,
 161                 0x42,0xB2,0x06,0x86,0xF6,0x09,0x66,0x0E,0x9A,0x25,0x94,0x3E,
 162                 0xD2,0x04,0x25,0x25,0x1D,0x23,0xEB,0xDC,0x4D,0x0C,0x83,0x28,
 163                 0x2E,0x15,0x81,0x2D,0xC1,0xAF,0x8D,0x36,0x64,0xE3,0x9A,0x83,
 164                 0x78,0xC2,0x8D,0xC0,0x9D,0xD9,0x3A,0x1C,0xC5,0x2B,0x50,0x68,
 165                 0x07,0xA9,0x4B,0x8C,0x07,0x57,0xD6,0x15,0x03,0x4E,0x9E,0x01,
 166                 0xF2,0x6F,0x35,0xAC,0x26,0x9C,0x92,0x68,0x61,0x13,0xFB,0x01,
 167                 0xBA,0x22,0x36,0x01,0x55,0xB6,0x62,0xD9,0xB2,0x98,0xCE,0x5D,
 168                 0x4B,0xA5,0x41,0xD6,0xE5,0x70,0x78,0x12,0x1F,0x64,0xB6,0x6F,
 169                 0xB0,0x91,0x51,0x91,0x92,0xC0,0x94,0x3A,0xD1,0x28,0x4D,0x30,
 170                 0x84,0x3E,0xE4,0xE4,0x7F,0x47,0x89,0xB1,0xB6,0x8C,0x8E,0x0E,
 171                 0x26,0xDB,0xCD,0x17,0x07,0x2A,0x21,0x7A,0xCC,0x68,0xE8,0x57,
 172                 0x94,0x9E,0x59,0x61,0xEC,0x20,0x34,0x26,0x0D,0x66,0x44,0xEB,
 173                 0x6F,0x02,0x58,0xE2,0xED,0xF6,0xF3,0x1B,0xBF,0x9E,0x45,0x52,
 174                 0x5A,0x49,0xA1,0x5B,
 175                 };
 176         static unsigned char dh2048_g[]={
 177                 0x02,
 178                 };
 179         DH *dh = NULL;
 180         BIGNUM *p = NULL, *g = NULL;
 181
 182         dh = DH_new();
 183         p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL);
 184         g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL);
 185         if (!dh || !p || !g)
 186                 goto err;
 187
 188 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
 189         dh->p = p;
 190         dh->g = g;
 191 #else
 192         if (!DH_set0_pqg(dh, p, NULL, g))
 193                 goto err;
 194 #endif
 195         return dh;
 196 err:
 197         if (p)
 198                 BN_free(p);
 199         if (g)
 200                 BN_free(g);
 201         if (dh)
 202                 DH_free(dh);
 203         return NULL;
 204 }
 205 #endif /* SPLINT */
 206
 207 struct daemon_remote*
 208 daemon_remote_create(struct config_file* cfg)
 209 {
 210         char* s_cert;
 211         char* s_key;
 212         struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 213                 sizeof(*rc));
 214         if(!rc) {
 215                 log_err("out of memory in daemon_remote_create");
 216                 return NULL;
 217         }
 218         rc->max_active = 10;
 219
 220         if(!cfg->remote_control_enable) {
 221                 rc->ctx = NULL;
 222                 return rc;
 223         }
 224         rc->ctx = SSL_CTX_new(SSLv23_server_method());
 225         if(!rc->ctx) {
 226                 log_crypto_err("could not SSL_CTX_new");
 227                 free(rc);
 228                 return NULL;
 229         }
 230         /* no SSLv2, SSLv3 because has defects */
 231         if((SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)
 232                 != SSL_OP_NO_SSLv2){
 233                 log_crypto_err("could not set SSL_OP_NO_SSLv2");
 234                 daemon_remote_delete(rc);
 235                 return NULL;
 236         }
 237         if((SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3)
 238                 != SSL_OP_NO_SSLv3){
 239                 log_crypto_err("could not set SSL_OP_NO_SSLv3");
 240                 daemon_remote_delete(rc);
 241                 return NULL;
 242         }
 243
 244         if (cfg->remote_control_use_cert == 0) {
 245                 /* No certificates are requested */
 246                 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL")) {
 247                         log_crypto_err("Failed to set aNULL cipher list");
 248                         daemon_remote_delete(rc);
 249                         return NULL;
 250                 }
 251
 252                 /* Since we have no certificates and hence no source of
 253                  * DH params, let's generate and set them
 254                  */
 255                 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh2048())) {
 256                         log_crypto_err("Wanted to set DH param, but failed");
 257                         daemon_remote_delete(rc);
 258                         return NULL;
 259                 }
 260                 return rc;
 261         }
 262         rc->use_cert = 1;
 263         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 264         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 265         if(!s_cert || !s_key) {
 266                 log_err("out of memory in remote control fname");
 267                 goto setup_error;
 268         }
 269         verbose(VERB_ALGO, "setup SSL certificates");
 270         if (!SSL_CTX_use_certificate_chain_file(rc->ctx,s_cert)) {
 271                 log_err("Error for server-cert-file: %s", s_cert);
 272                 log_crypto_err("Error in SSL_CTX use_certificate_chain_file");
 273                 goto setup_error;
 274         }
 275         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 276                 log_err("Error for server-key-file: %s", s_key);
 277                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 278                 goto setup_error;
 279         }
 280         if(!SSL_CTX_check_private_key(rc->ctx)) {
 281                 log_err("Error for server-key-file: %s", s_key);
 282                 log_crypto_err("Error in SSL_CTX check_private_key");
 283                 goto setup_error;
 284         }
 285 #if HAVE_DECL_SSL_CTX_SET_ECDH_AUTO
 286         if(!SSL_CTX_set_ecdh_auto(rc->ctx,1)) {
 287                 log_crypto_err("Error in SSL_CTX_ecdh_auto, not enabling ECDHE");
 288         }
 289 #elif defined(USE_ECDSA)
 290         if(1) {
 291                 EC_KEY *ecdh = EC_KEY_new_by_curve_name (NID_X9_62_prime256v1);
 292                 if (!ecdh) {
 293                         log_crypto_err("could not find p256, not enabling ECDHE");
 294                 } else {
 295                         if (1 != SSL_CTX_set_tmp_ecdh (rc->ctx, ecdh)) {
 296                                 log_crypto_err("Error in SSL_CTX_set_tmp_ecdh, not enabling ECDHE");
 297                         }
 298                         EC_KEY_free (ecdh);
 299                 }
 300         }
 301 #endif
 302         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 303                 log_crypto_err("Error setting up SSL_CTX verify locations");
 304         setup_error:
 305                 free(s_cert);
 306                 free(s_key);
 307                 daemon_remote_delete(rc);
 308                 return NULL;
 309         }
 310         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 311         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 312         free(s_cert);
 313         free(s_key);
 314
 315         return rc;
 316 }
 317
 318 void daemon_remote_clear(struct daemon_remote* rc)
 319 {
 320         struct rc_state* p, *np;
 321         if(!rc) return;
 322         /* but do not close the ports */
 323         listen_list_delete(rc->accept_list);
 324         rc->accept_list = NULL;
 325         /* do close these sockets */
 326         p = rc->busy_list;
 327         while(p) {
 328                 np = p->next;
 329                 if(p->ssl)
 330                         SSL_free(p->ssl);
 331                 comm_point_delete(p->c);
 332                 free(p);
 333                 p = np;
 334         }
 335         rc->busy_list = NULL;
 336         rc->active = 0;
 337         rc->worker = NULL;
 338 }
 339
 340 void daemon_remote_delete(struct daemon_remote* rc)
 341 {
 342         if(!rc) return;
 343         daemon_remote_clear(rc);
 344         if(rc->ctx) {
 345                 SSL_CTX_free(rc->ctx);
 346         }
 347         free(rc);
 348 }
 349
 350 /**
 351  * Add and open a new control port
 352  * @param ip: ip str
 353  * @param nr: port nr
 354  * @param list: list head
 355  * @param noproto_is_err: if lack of protocol support is an error.
 356  * @param cfg: config with username for chown of unix-sockets.
 357  * @return false on failure.
 358  */
 359 static int
 360 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
 361         struct config_file* cfg)
 362 {
 363         struct addrinfo hints;
 364         struct addrinfo* res;
 365         struct listen_port* n;
 366         int noproto;
 367         int fd, r;
 368         char port[15];
 369         snprintf(port, sizeof(port), "%d", nr);
 370         port[sizeof(port)-1]=0;
 371         memset(&hints, 0, sizeof(hints));
 372
 373         if(ip[0] == '/') {
 374                 /* This looks like a local socket */
 375                 fd = create_local_accept_sock(ip, &noproto);
 376                 /*
 377                  * Change socket ownership and permissions so users other
 378                  * than root can access it provided they are in the same
 379                  * group as the user we run as.
 380                  */
 381                 if(fd != -1) {
 382 #ifdef HAVE_CHOWN
 383                         if (cfg->username && cfg->username[0] &&
 384                                 cfg_uid != (uid_t)-1) {
 385                                 if(chown(ip, cfg_uid, cfg_gid) == -1)
 386                                         log_err("cannot chown %u.%u %s: %s",
 387                                           (unsigned)cfg_uid, (unsigned)cfg_gid,
 388                                           ip, strerror(errno));
 389                         }
 390                         chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
 391 #else
 392                         (void)cfg;
 393 #endif
 394                 }
 395         } else {
 396                 hints.ai_socktype = SOCK_STREAM;
 397                 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 398                 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 399 #ifdef USE_WINSOCK
 400                         if(!noproto_is_err && r == EAI_NONAME) {
 401                                 /* tried to lookup the address as name */
 402                                 return 1; /* return success, but do nothing */
 403                         }
 404 #endif /* USE_WINSOCK */
 405                         log_err("control interface %s:%s getaddrinfo: %s %s",
 406                                 ip?ip:"default", port, gai_strerror(r),
 407 #ifdef EAI_SYSTEM
 408                                 r==EAI_SYSTEM?(char*)strerror(errno):""
 409 #else
 410                                 ""
 411 #endif
 412                         );
 413                         return 0;
 414                 }
 415
 416                 /* open fd */
 417                 fd = create_tcp_accept_sock(res, 1, &noproto, 0,
 418                         cfg->ip_transparent, 0, cfg->ip_freebind);
 419                 freeaddrinfo(res);
 420         }
 421
 422         if(fd == -1 && noproto) {
 423                 if(!noproto_is_err)
 424                         return 1; /* return success, but do nothing */
 425                 log_err("cannot open control interface %s %d : "
 426                         "protocol not supported", ip, nr);
 427                 return 0;
 428         }
 429         if(fd == -1) {
 430                 log_err("cannot open control interface %s %d", ip, nr);
 431                 return 0;
 432         }
 433
 434         /* alloc */
 435         n = (struct listen_port*)calloc(1, sizeof(*n));
 436         if(!n) {
 437 #ifndef USE_WINSOCK
 438                 close(fd);
 439 #else
 440                 closesocket(fd);
 441 #endif
 442                 log_err("out of memory");
 443                 return 0;
 444         }
 445         n->next = *list;
 446         *list = n;
 447         n->fd = fd;
 448         return 1;
 449 }
 450
 451 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 452 {
 453         struct listen_port* l = NULL;
 454         log_assert(cfg->remote_control_enable && cfg->control_port);
 455         if(cfg->control_ifs) {
 456                 struct config_strlist* p;
 457                 for(p = cfg->control_ifs; p; p = p->next) {
 458                         if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
 459                                 listening_ports_free(l);
 460                                 return NULL;
 461                         }
 462                 }
 463         } else {
 464                 /* defaults */
 465                 if(cfg->do_ip6 &&
 466                         !add_open("::1", cfg->control_port, &l, 0, cfg)) {
 467                         listening_ports_free(l);
 468                         return NULL;
 469                 }
 470                 if(cfg->do_ip4 &&
 471                         !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
 472                         listening_ports_free(l);
 473                         return NULL;
 474                 }
 475         }
 476         return l;
 477 }
 478
 479 /** open accept commpoint */
 480 static int
 481 accept_open(struct daemon_remote* rc, int fd)
 482 {
 483         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 484         if(!n) {
 485                 log_err("out of memory");
 486                 return 0;
 487         }
 488         n->next = rc->accept_list;
 489         rc->accept_list = n;
 490         /* open commpt */
 491         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 492                 &remote_accept_callback, rc);
 493         if(!n->com)
 494                 return 0;
 495         /* keep this port open, its fd is kept in the rc portlist */
 496         n->com->do_not_close = 1;
 497         return 1;
 498 }
 499
 500 int daemon_remote_open_accept(struct daemon_remote* rc,
 501         struct listen_port* ports, struct worker* worker)
 502 {
 503         struct listen_port* p;
 504         rc->worker = worker;
 505         for(p = ports; p; p = p->next) {
 506                 if(!accept_open(rc, p->fd)) {
 507                         log_err("could not create accept comm point");
 508                         return 0;
 509                 }
 510         }
 511         return 1;
 512 }
 513
 514 void daemon_remote_stop_accept(struct daemon_remote* rc)
 515 {
 516         struct listen_list* p;
 517         for(p=rc->accept_list; p; p=p->next) {
 518                 comm_point_stop_listening(p->com);
 519         }
 520 }
 521
 522 void daemon_remote_start_accept(struct daemon_remote* rc)
 523 {
 524         struct listen_list* p;
 525         for(p=rc->accept_list; p; p=p->next) {
 526                 comm_point_start_listening(p->com, -1, -1);
 527         }
 528 }
 529
 530 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 531         struct comm_reply* ATTR_UNUSED(rep))
 532 {
 533         struct daemon_remote* rc = (struct daemon_remote*)arg;
 534         struct sockaddr_storage addr;
 535         socklen_t addrlen;
 536         int newfd;
 537         struct rc_state* n;
 538         if(err != NETEVENT_NOERROR) {
 539                 log_err("error %d on remote_accept_callback", err);
 540                 return 0;
 541         }
 542         /* perform the accept */
 543         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 544         if(newfd == -1)
 545                 return 0;
 546         /* create new commpoint unless we are servicing already */
 547         if(rc->active >= rc->max_active) {
 548                 log_warn("drop incoming remote control: too many connections");
 549         close_exit:
 550 #ifndef USE_WINSOCK
 551                 close(newfd);
 552 #else
 553                 closesocket(newfd);
 554 #endif
 555                 return 0;
 556         }
 557
 558         /* setup commpoint to service the remote control command */
 559         n = (struct rc_state*)calloc(1, sizeof(*n));
 560         if(!n) {
 561                 log_err("out of memory");
 562                 goto close_exit;
 563         }
 564         /* start in reading state */
 565         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 566                 &remote_control_callback, n);
 567         if(!n->c) {
 568                 log_err("out of memory");
 569                 free(n);
 570                 goto close_exit;
 571         }
 572         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 573         n->c->do_not_close = 0;
 574         comm_point_stop_listening(n->c);
 575         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 576         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 577         n->c->repinfo.addrlen = addrlen;
 578         n->shake_state = rc_hs_read;
 579         n->ssl = SSL_new(rc->ctx);
 580         if(!n->ssl) {
 581                 log_crypto_err("could not SSL_new");
 582                 comm_point_delete(n->c);
 583                 free(n);
 584                 goto close_exit;
 585         }
 586         SSL_set_accept_state(n->ssl);
 587         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 588         if(!SSL_set_fd(n->ssl, newfd)) {
 589                 log_crypto_err("could not SSL_set_fd");
 590                 SSL_free(n->ssl);
 591                 comm_point_delete(n->c);
 592                 free(n);
 593                 goto close_exit;
 594         }
 595
 596         n->rc = rc;
 597         n->next = rc->busy_list;
 598         rc->busy_list = n;
 599         rc->active ++;
 600
 601         /* perform the first nonblocking read already, for windows,
 602          * so it can return wouldblock. could be faster too. */
 603         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 604         return 0;
 605 }
 606
 607 /** delete from list */
 608 static void
 609 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 610 {
 611         while(*list) {
 612                 if( (*list)->c == c) {
 613                         *list = (*list)->next;
 614                         return;
 615                 }
 616                 list = &(*list)->next;
 617         }
 618 }
 619
 620 /** decrease active count and remove commpoint from busy list */
 621 static void
 622 clean_point(struct daemon_remote* rc, struct rc_state* s)
 623 {
 624         state_list_remove_elem(&rc->busy_list, s->c);
 625         rc->active --;
 626         if(s->ssl) {
 627                 SSL_shutdown(s->ssl);
 628                 SSL_free(s->ssl);
 629         }
 630         comm_point_delete(s->c);
 631         free(s);
 632 }
 633
 634 int
 635 ssl_print_text(SSL* ssl, const char* text)
 636 {
 637         int r;
 638         if(!ssl)
 639                 return 0;
 640         ERR_clear_error();
 641         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 642                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 643                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 644                                 "closed connection");
 645                         return 0;
 646                 }
 647                 log_crypto_err("could not SSL_write");
 648                 return 0;
 649         }
 650         return 1;
 651 }
 652
 653 /** print text over the ssl connection */
 654 static int
 655 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 656 {
 657         char msg[1024];
 658         vsnprintf(msg, sizeof(msg), format, args);
 659         return ssl_print_text(ssl, msg);
 660 }
 661
 662 /** printf style printing to the ssl connection */
 663 int ssl_printf(SSL* ssl, const char* format, ...)
 664 {
 665         va_list args;
 666         int ret;
 667         va_start(args, format);
 668         ret = ssl_print_vmsg(ssl, format, args);
 669         va_end(args);
 670         return ret;
 671 }
 672
 673 int
 674 ssl_read_line(SSL* ssl, char* buf, size_t max)
 675 {
 676         int r;
 677         size_t len = 0;
 678         if(!ssl)
 679                 return 0;
 680         while(len < max) {
 681                 ERR_clear_error();
 682                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 683                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 684                                 buf[len] = 0;
 685                                 return 1;
 686                         }
 687                         log_crypto_err("could not SSL_read");
 688                         return 0;
 689                 }
 690                 if(buf[len] == '\n') {
 691                         /* return string without \n */
 692                         buf[len] = 0;
 693                         return 1;
 694                 }
 695                 len++;
 696         }
 697         buf[max-1] = 0;
 698         log_err("control line too long (%d): %s", (int)max, buf);
 699         return 0;
 700 }
 701
 702 /** skip whitespace, return new pointer into string */
 703 static char*
 704 skipwhite(char* str)
 705 {
 706         /* EOS \0 is not a space */
 707         while( isspace((unsigned char)*str) )
 708                 str++;
 709         return str;
 710 }
 711
 712 /** send the OK to the control client */
 713 static void send_ok(SSL* ssl)
 714 {
 715         (void)ssl_printf(ssl, "ok\n");
 716 }
 717
 718 /** do the stop command */
 719 static void
 720 do_stop(SSL* ssl, struct daemon_remote* rc)
 721 {
 722         rc->worker->need_to_exit = 1;
 723         comm_base_exit(rc->worker->base);
 724         send_ok(ssl);
 725 }
 726
 727 /** do the reload command */
 728 static void
 729 do_reload(SSL* ssl, struct daemon_remote* rc)
 730 {
 731         rc->worker->need_to_exit = 0;
 732         comm_base_exit(rc->worker->base);
 733         send_ok(ssl);
 734 }
 735
 736 /** do the verbosity command */
 737 static void
 738 do_verbosity(SSL* ssl, char* str)
 739 {
 740         int val = atoi(str);
 741         if(val == 0 && strcmp(str, "0") != 0) {
 742                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 743                 return;
 744         }
 745         verbosity = val;
 746         send_ok(ssl);
 747 }
 748
 749 /** print stats from statinfo */
 750 static int
 751 print_stats(SSL* ssl, const char* nm, struct stats_info* s)
 752 {
 753         struct timeval avg;
 754         if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 755                 (unsigned long)s->svr.num_queries)) return 0;
 756         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
 757                 (unsigned long)(s->svr.num_queries
 758                         - s->svr.num_queries_missed_cache))) return 0;
 759         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 760                 (unsigned long)s->svr.num_queries_missed_cache)) return 0;
 761         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 762                 (unsigned long)s->svr.num_queries_prefetch)) return 0;
 763         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 764                 (unsigned long)s->mesh_replies_sent)) return 0;
 765         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 766                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 767                         (double)s->svr.sum_query_list_size/
 768                         (s->svr.num_queries_missed_cache+
 769                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 770         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm,
 771                 (unsigned long)s->svr.max_query_list_size)) return 0;
 772         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm,
 773                 (unsigned long)s->mesh_jostled)) return 0;
 774         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm,
 775                 (unsigned long)s->mesh_dropped)) return 0;
 776         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm,
 777                 (unsigned long)s->mesh_num_states)) return 0;
 778         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm,
 779                 (unsigned long)s->mesh_num_reply_states)) return 0;
 780         timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
 781         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 782                 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
 783         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 784                 s->mesh_time_median)) return 0;
 785         if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm,
 786                 (unsigned long)s->svr.tcp_accept_usage)) return 0;
 787         return 1;
 788 }
 789
 790 /** print stats for one thread */
 791 static int
 792 print_thread_stats(SSL* ssl, int i, struct stats_info* s)
 793 {
 794         char nm[16];
 795         snprintf(nm, sizeof(nm), "thread%d", i);
 796         nm[sizeof(nm)-1]=0;
 797         return print_stats(ssl, nm, s);
 798 }
 799
 800 /** print long number */
 801 static int
 802 print_longnum(SSL* ssl, const char* desc, size_t x)
 803 {
 804         if(x > 1024*1024*1024) {
 805                 /* more than a Gb */
 806                 size_t front = x / (size_t)1000000;
 807                 size_t back = x % (size_t)1000000;
 808                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 809                         (unsigned)front, (unsigned)back);
 810         } else {
 811                 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
 812         }
 813 }
 814
 815 /** print mem stats */
 816 static int
 817 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 818 {
 819         int m;
 820         size_t msg, rrset, val, iter;
 821 #ifdef HAVE_SBRK
 822         extern void* unbound_start_brk;
 823         void* cur = sbrk(0);
 824         if(!print_longnum(ssl, "mem.total.sbrk"SQ,
 825                 (size_t)((char*)cur - (char*)unbound_start_brk))) return 0;
 826 #endif /* HAVE_SBRK */
 827         msg = slabhash_get_mem(daemon->env->msg_cache);
 828         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 829         val=0;
 830         iter=0;
 831         m = modstack_find(&worker->env.mesh->mods, "validator");
 832         if(m != -1) {
 833                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 834                         mods.mod[m]->get_mem));
 835                 val = (*worker->env.mesh->mods.mod[m]->get_mem)
 836                         (&worker->env, m);
 837         }
 838         m = modstack_find(&worker->env.mesh->mods, "iterator");
 839         if(m != -1) {
 840                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 841                         mods.mod[m]->get_mem));
 842                 iter = (*worker->env.mesh->mods.mod[m]->get_mem)
 843                         (&worker->env, m);
 844         }
 845
 846         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 847                 return 0;
 848         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 849                 return 0;
 850         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 851                 return 0;
 852         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 853                 return 0;
 854         return 1;
 855 }
 856
 857 /** print uptime stats */
 858 static int
 859 print_uptime(SSL* ssl, struct worker* worker, int reset)
 860 {
 861         struct timeval now = *worker->env.now_tv;
 862         struct timeval up, dt;
 863         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 864         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 865         if(reset)
 866                 worker->daemon->time_last_stat = now;
 867         if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 868                 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 869         if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 870                 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 871         if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 872                 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 873         return 1;
 874 }
 875
 876 /** print extended histogram */
 877 static int
 878 print_hist(SSL* ssl, struct stats_info* s)
 879 {
 880         struct timehist* hist;
 881         size_t i;
 882         hist = timehist_setup();
 883         if(!hist) {
 884                 log_err("out of memory");
 885                 return 0;
 886         }
 887         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 888         for(i=0; i<hist->num; i++) {
 889                 if(!ssl_printf(ssl,
 890                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 891                         (int)hist->buckets[i].lower.tv_sec,
 892                         (int)hist->buckets[i].lower.tv_usec,
 893                         (int)hist->buckets[i].upper.tv_sec,
 894                         (int)hist->buckets[i].upper.tv_usec,
 895                         (unsigned long)hist->buckets[i].count)) {
 896                         timehist_delete(hist);
 897                         return 0;
 898                 }
 899         }
 900         timehist_delete(hist);
 901         return 1;
 902 }
 903
 904 /** print extended stats */
 905 static int
 906 print_ext(SSL* ssl, struct stats_info* s)
 907 {
 908         int i;
 909         char nm[16];
 910         const sldns_rr_descriptor* desc;
 911         const sldns_lookup_table* lt;
 912         /* TYPE */
 913         for(i=0; i<STATS_QTYPE_NUM; i++) {
 914                 if(inhibit_zero && s->svr.qtype[i] == 0)
 915                         continue;
 916                 desc = sldns_rr_descript((uint16_t)i);
 917                 if(desc && desc->_name) {
 918                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 919                 } else if (i == LDNS_RR_TYPE_IXFR) {
 920                         snprintf(nm, sizeof(nm), "IXFR");
 921                 } else if (i == LDNS_RR_TYPE_AXFR) {
 922                         snprintf(nm, sizeof(nm), "AXFR");
 923                 } else if (i == LDNS_RR_TYPE_MAILA) {
 924                         snprintf(nm, sizeof(nm), "MAILA");
 925                 } else if (i == LDNS_RR_TYPE_MAILB) {
 926                         snprintf(nm, sizeof(nm), "MAILB");
 927                 } else if (i == LDNS_RR_TYPE_ANY) {
 928                         snprintf(nm, sizeof(nm), "ANY");
 929                 } else {
 930                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 931                 }
 932                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 933                         nm, (unsigned long)s->svr.qtype[i])) return 0;
 934         }
 935         if(!inhibit_zero || s->svr.qtype_big) {
 936                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 937                         (unsigned long)s->svr.qtype_big)) return 0;
 938         }
 939         /* CLASS */
 940         for(i=0; i<STATS_QCLASS_NUM; i++) {
 941                 if(inhibit_zero && s->svr.qclass[i] == 0)
 942                         continue;
 943                 lt = sldns_lookup_by_id(sldns_rr_classes, i);
 944                 if(lt && lt->name) {
 945                         snprintf(nm, sizeof(nm), "%s", lt->name);
 946                 } else {
 947                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 948                 }
 949                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 950                         nm, (unsigned long)s->svr.qclass[i])) return 0;
 951         }
 952         if(!inhibit_zero || s->svr.qclass_big) {
 953                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 954                         (unsigned long)s->svr.qclass_big)) return 0;
 955         }
 956         /* OPCODE */
 957         for(i=0; i<STATS_OPCODE_NUM; i++) {
 958                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 959                         continue;
 960                 lt = sldns_lookup_by_id(sldns_opcodes, i);
 961                 if(lt && lt->name) {
 962                         snprintf(nm, sizeof(nm), "%s", lt->name);
 963                 } else {
 964                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 965                 }
 966                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 967                         nm, (unsigned long)s->svr.qopcode[i])) return 0;
 968         }
 969         /* transport */
 970         if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
 971                 (unsigned long)s->svr.qtcp)) return 0;
 972         if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
 973                 (unsigned long)s->svr.qtcp_outgoing)) return 0;
 974         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
 975                 (unsigned long)s->svr.qipv6)) return 0;
 976         /* flags */
 977         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
 978                 (unsigned long)s->svr.qbit_QR)) return 0;
 979         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
 980                 (unsigned long)s->svr.qbit_AA)) return 0;
 981         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
 982                 (unsigned long)s->svr.qbit_TC)) return 0;
 983         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
 984                 (unsigned long)s->svr.qbit_RD)) return 0;
 985         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
 986                 (unsigned long)s->svr.qbit_RA)) return 0;
 987         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
 988                 (unsigned long)s->svr.qbit_Z)) return 0;
 989         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
 990                 (unsigned long)s->svr.qbit_AD)) return 0;
 991         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
 992                 (unsigned long)s->svr.qbit_CD)) return 0;
 993         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
 994                 (unsigned long)s->svr.qEDNS)) return 0;
 995         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
 996                 (unsigned long)s->svr.qEDNS_DO)) return 0;
 997
 998         /* RCODE */
 999         for(i=0; i<STATS_RCODE_NUM; i++) {
1000                 /* Always include RCODEs 0-5 */
1001                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
1002                         continue;
1003                 lt = sldns_lookup_by_id(sldns_rcodes, i);
1004                 if(lt && lt->name) {
1005                         snprintf(nm, sizeof(nm), "%s", lt->name);
1006                 } else {
1007                         snprintf(nm, sizeof(nm), "RCODE%d", i);
1008                 }
1009                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
1010                         nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
1011         }
1012         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
1013                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
1014                         (unsigned long)s->svr.ans_rcode_nodata)) return 0;
1015         }
1016         /* validation */
1017         if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
1018                 (unsigned long)s->svr.ans_secure)) return 0;
1019         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
1020                 (unsigned long)s->svr.ans_bogus)) return 0;
1021         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
1022                 (unsigned long)s->svr.rrset_bogus)) return 0;
1023         /* threat detection */
1024         if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
1025                 (unsigned long)s->svr.unwanted_queries)) return 0;
1026         if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
1027                 (unsigned long)s->svr.unwanted_replies)) return 0;
1028         /* cache counts */
1029         if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
1030                 (unsigned)s->svr.msg_cache_count)) return 0;
1031         if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n",
1032                 (unsigned)s->svr.rrset_cache_count)) return 0;
1033         if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n",
1034                 (unsigned)s->svr.infra_cache_count)) return 0;
1035         if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
1036                 (unsigned)s->svr.key_cache_count)) return 0;
1037         return 1;
1038 }
1039
1040 /** do the stats command */
1041 static void
1042 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
1043 {
1044         struct daemon* daemon = rc->worker->daemon;
1045         struct stats_info total;
1046         struct stats_info s;
1047         int i;
1048         log_assert(daemon->num > 0);
1049         /* gather all thread statistics in one place */
1050         for(i=0; i<daemon->num; i++) {
1051                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
1052                 if(!print_thread_stats(ssl, i, &s))
1053                         return;
1054                 if(i == 0)
1055                         total = s;
1056                 else    server_stats_add(&total, &s);
1057         }
1058         /* print the thread statistics */
1059         total.mesh_time_median /= (double)daemon->num;
1060         if(!print_stats(ssl, "total", &total))
1061                 return;
1062         if(!print_uptime(ssl, rc->worker, reset))
1063                 return;
1064         if(daemon->cfg->stat_extended) {
1065                 if(!print_mem(ssl, rc->worker, daemon))
1066                         return;
1067                 if(!print_hist(ssl, &total))
1068                         return;
1069                 if(!print_ext(ssl, &total))
1070                         return;
1071         }
1072 }
1073
1074 /** parse commandline argument domain name */
1075 static int
1076 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
1077 {
1078         uint8_t nm[LDNS_MAX_DOMAINLEN+1];
1079         size_t nmlen = sizeof(nm);
1080         int status;
1081         *res = NULL;
1082         *len = 0;
1083         *labs = 0;
1084         status = sldns_str2wire_dname_buf(str, nm, &nmlen);
1085         if(status != 0) {
1086                 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str,
1087                         LDNS_WIREPARSE_OFFSET(status),
1088                         sldns_get_errorstr_parse(status));
1089                 return 0;
1090         }
1091         *res = memdup(nm, nmlen);
1092         if(!*res) {
1093                 ssl_printf(ssl, "error out of memory\n");
1094                 return 0;
1095         }
1096         *labs = dname_count_size_labels(*res, len);
1097         return 1;
1098 }
1099
1100 /** find second argument, modifies string */
1101 static int
1102 find_arg2(SSL* ssl, char* arg, char** arg2)
1103 {
1104         char* as = strchr(arg, ' ');
1105         char* at = strchr(arg, '\t');
1106         if(as && at) {
1107                 if(at < as)
1108                         as = at;
1109                 as[0]=0;
1110                 *arg2 = skipwhite(as+1);
1111         } else if(as) {
1112                 as[0]=0;
1113                 *arg2 = skipwhite(as+1);
1114         } else if(at) {
1115                 at[0]=0;
1116                 *arg2 = skipwhite(at+1);
1117         } else {
1118                 ssl_printf(ssl, "error could not find next argument "
1119                         "after %s\n", arg);
1120                 return 0;
1121         }
1122         return 1;
1123 }
1124
1125 /** Add a new zone */
1126 static void
1127 do_zone_add(SSL* ssl, struct worker* worker, char* arg)
1128 {
1129         uint8_t* nm;
1130         int nmlabs;
1131         size_t nmlen;
1132         char* arg2;
1133         enum localzone_type t;
1134         struct local_zone* z;
1135         if(!find_arg2(ssl, arg, &arg2))
1136                 return;
1137         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1138                 return;
1139         if(!local_zone_str2type(arg2, &t)) {
1140                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
1141                 free(nm);
1142                 return;
1143         }
1144         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1145         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1146                 nmlabs, LDNS_RR_CLASS_IN))) {
1147                 /* already present in tree */
1148                 lock_rw_wrlock(&z->lock);
1149                 z->type = t; /* update type anyway */
1150                 lock_rw_unlock(&z->lock);
1151                 free(nm);
1152                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1153                 send_ok(ssl);
1154                 return;
1155         }
1156         if(!local_zones_add_zone(worker->daemon->local_zones, nm, nmlen,
1157                 nmlabs, LDNS_RR_CLASS_IN, t)) {
1158                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1159                 ssl_printf(ssl, "error out of memory\n");
1160                 return;
1161         }
1162         lock_rw_unlock(&worker->daemon->local_zones->lock);
1163         send_ok(ssl);
1164 }
1165
1166 /** Remove a zone */
1167 static void
1168 do_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1169 {
1170         uint8_t* nm;
1171         int nmlabs;
1172         size_t nmlen;
1173         struct local_zone* z;
1174         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1175                 return;
1176         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1177         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1178                 nmlabs, LDNS_RR_CLASS_IN))) {
1179                 /* present in tree */
1180                 local_zones_del_zone(worker->daemon->local_zones, z);
1181         }
1182         lock_rw_unlock(&worker->daemon->local_zones->lock);
1183         free(nm);
1184         send_ok(ssl);
1185 }
1186
1187 /** Add new RR data */
1188 static void
1189 do_data_add(SSL* ssl, struct worker* worker, char* arg)
1190 {
1191         if(!local_zones_add_RR(worker->daemon->local_zones, arg)) {
1192                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1193                 return;
1194         }
1195         send_ok(ssl);
1196 }
1197
1198 /** Remove RR data */
1199 static void
1200 do_data_remove(SSL* ssl, struct worker* worker, char* arg)
1201 {
1202         uint8_t* nm;
1203         int nmlabs;
1204         size_t nmlen;
1205         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1206                 return;
1207         local_zones_del_data(worker->daemon->local_zones, nm,
1208                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1209         free(nm);
1210         send_ok(ssl);
1211 }
1212
1213 /** cache lookup of nameservers */
1214 static void
1215 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1216 {
1217         uint8_t* nm;
1218         int nmlabs;
1219         size_t nmlen;
1220         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1221                 return;
1222         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1223         free(nm);
1224 }
1225
1226 /** flush something from rrset and msg caches */
1227 static void
1228 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1229         uint16_t t, uint16_t c)
1230 {
1231         hashvalue_t h;
1232         struct query_info k;
1233         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1234         if(t == LDNS_RR_TYPE_SOA)
1235                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1236                         PACKED_RRSET_SOA_NEG);
1237         k.qname = nm;
1238         k.qname_len = nmlen;
1239         k.qtype = t;
1240         k.qclass = c;
1241         h = query_info_hash(&k, 0);
1242         slabhash_remove(worker->env.msg_cache, h, &k);
1243         if(t == LDNS_RR_TYPE_AAAA) {
1244                 /* for AAAA also flush dns64 bit_cd packet */
1245                 h = query_info_hash(&k, BIT_CD);
1246                 slabhash_remove(worker->env.msg_cache, h, &k);
1247         }
1248 }
1249
1250 /** flush a type */
1251 static void
1252 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1253 {
1254         uint8_t* nm;
1255         int nmlabs;
1256         size_t nmlen;
1257         char* arg2;
1258         uint16_t t;
1259         if(!find_arg2(ssl, arg, &arg2))
1260                 return;
1261         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1262                 return;
1263         t = sldns_get_rr_type_by_name(arg2);
1264         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1265
1266         free(nm);
1267         send_ok(ssl);
1268 }
1269
1270 /** flush statistics */
1271 static void
1272 do_flush_stats(SSL* ssl, struct worker* worker)
1273 {
1274         worker_stats_clear(worker);
1275         send_ok(ssl);
1276 }
1277
1278 /**
1279  * Local info for deletion functions
1280  */
1281 struct del_info {
1282         /** worker */
1283         struct worker* worker;
1284         /** name to delete */
1285         uint8_t* name;
1286         /** length */
1287         size_t len;
1288         /** labels */
1289         int labs;
1290         /** time to invalidate to */
1291         time_t expired;
1292         /** number of rrsets removed */
1293         size_t num_rrsets;
1294         /** number of msgs removed */
1295         size_t num_msgs;
1296         /** number of key entries removed */
1297         size_t num_keys;
1298         /** length of addr */
1299         socklen_t addrlen;
1300         /** socket address for host deletion */
1301         struct sockaddr_storage addr;
1302 };
1303
1304 /** callback to delete hosts in infra cache */
1305 static void
1306 infra_del_host(struct lruhash_entry* e, void* arg)
1307 {
1308         /* entry is locked */
1309         struct del_info* inf = (struct del_info*)arg;
1310         struct infra_key* k = (struct infra_key*)e->key;
1311         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1312                 struct infra_data* d = (struct infra_data*)e->data;
1313                 d->probedelay = 0;
1314                 d->timeout_A = 0;
1315                 d->timeout_AAAA = 0;
1316                 d->timeout_other = 0;
1317                 rtt_init(&d->rtt);
1318                 if(d->ttl > inf->expired) {
1319                         d->ttl = inf->expired;
1320                         inf->num_keys++;
1321                 }
1322         }
1323 }
1324
1325 /** flush infra cache */
1326 static void
1327 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1328 {
1329         struct sockaddr_storage addr;
1330         socklen_t len;
1331         struct del_info inf;
1332         if(strcmp(arg, "all") == 0) {
1333                 slabhash_clear(worker->env.infra_cache->hosts);
1334                 send_ok(ssl);
1335                 return;
1336         }
1337         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1338                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1339                 return;
1340         }
1341         /* delete all entries from cache */
1342         /* what we do is to set them all expired */
1343         inf.worker = worker;
1344         inf.name = 0;
1345         inf.len = 0;
1346         inf.labs = 0;
1347         inf.expired = *worker->env.now;
1348         inf.expired -= 3; /* handle 3 seconds skew between threads */
1349         inf.num_rrsets = 0;
1350         inf.num_msgs = 0;
1351         inf.num_keys = 0;
1352         inf.addrlen = len;
1353         memmove(&inf.addr, &addr, len);
1354         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1355                 &inf);
1356         send_ok(ssl);
1357 }
1358
1359 /** flush requestlist */
1360 static void
1361 do_flush_requestlist(SSL* ssl, struct worker* worker)
1362 {
1363         mesh_delete_all(worker->env.mesh);
1364         send_ok(ssl);
1365 }
1366
1367 /** callback to delete rrsets in a zone */
1368 static void
1369 zone_del_rrset(struct lruhash_entry* e, void* arg)
1370 {
1371         /* entry is locked */
1372         struct del_info* inf = (struct del_info*)arg;
1373         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1374         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1375                 struct packed_rrset_data* d =
1376                         (struct packed_rrset_data*)e->data;
1377                 if(d->ttl > inf->expired) {
1378                         d->ttl = inf->expired;
1379                         inf->num_rrsets++;
1380                 }
1381         }
1382 }
1383
1384 /** callback to delete messages in a zone */
1385 static void
1386 zone_del_msg(struct lruhash_entry* e, void* arg)
1387 {
1388         /* entry is locked */
1389         struct del_info* inf = (struct del_info*)arg;
1390         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1391         if(dname_subdomain_c(k->key.qname, inf->name)) {
1392                 struct reply_info* d = (struct reply_info*)e->data;
1393                 if(d->ttl > inf->expired) {
1394                         d->ttl = inf->expired;
1395                         inf->num_msgs++;
1396                 }
1397         }
1398 }
1399
1400 /** callback to delete keys in zone */
1401 static void
1402 zone_del_kcache(struct lruhash_entry* e, void* arg)
1403 {
1404         /* entry is locked */
1405         struct del_info* inf = (struct del_info*)arg;
1406         struct key_entry_key* k = (struct key_entry_key*)e->key;
1407         if(dname_subdomain_c(k->name, inf->name)) {
1408                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1409                 if(d->ttl > inf->expired) {
1410                         d->ttl = inf->expired;
1411                         inf->num_keys++;
1412                 }
1413         }
1414 }
1415
1416 /** remove all rrsets and keys from zone from cache */
1417 static void
1418 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1419 {
1420         uint8_t* nm;
1421         int nmlabs;
1422         size_t nmlen;
1423         struct del_info inf;
1424         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1425                 return;
1426         /* delete all RRs and key entries from zone */
1427         /* what we do is to set them all expired */
1428         inf.worker = worker;
1429         inf.name = nm;
1430         inf.len = nmlen;
1431         inf.labs = nmlabs;
1432         inf.expired = *worker->env.now;
1433         inf.expired -= 3; /* handle 3 seconds skew between threads */
1434         inf.num_rrsets = 0;
1435         inf.num_msgs = 0;
1436         inf.num_keys = 0;
1437         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1438                 &zone_del_rrset, &inf);
1439
1440         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1441
1442         /* and validator cache */
1443         if(worker->env.key_cache) {
1444                 slabhash_traverse(worker->env.key_cache->slab, 1,
1445                         &zone_del_kcache, &inf);
1446         }
1447
1448         free(nm);
1449
1450         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1451                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1452                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1453 }
1454
1455 /** callback to delete bogus rrsets */
1456 static void
1457 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1458 {
1459         /* entry is locked */
1460         struct del_info* inf = (struct del_info*)arg;
1461         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1462         if(d->security == sec_status_bogus) {
1463                 d->ttl = inf->expired;
1464                 inf->num_rrsets++;
1465         }
1466 }
1467
1468 /** callback to delete bogus messages */
1469 static void
1470 bogus_del_msg(struct lruhash_entry* e, void* arg)
1471 {
1472         /* entry is locked */
1473         struct del_info* inf = (struct del_info*)arg;
1474         struct reply_info* d = (struct reply_info*)e->data;
1475         if(d->security == sec_status_bogus) {
1476                 d->ttl = inf->expired;
1477                 inf->num_msgs++;
1478         }
1479 }
1480
1481 /** callback to delete bogus keys */
1482 static void
1483 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1484 {
1485         /* entry is locked */
1486         struct del_info* inf = (struct del_info*)arg;
1487         struct key_entry_data* d = (struct key_entry_data*)e->data;
1488         if(d->isbad) {
1489                 d->ttl = inf->expired;
1490                 inf->num_keys++;
1491         }
1492 }
1493
1494 /** remove all bogus rrsets, msgs and keys from cache */
1495 static void
1496 do_flush_bogus(SSL* ssl, struct worker* worker)
1497 {
1498         struct del_info inf;
1499         /* what we do is to set them all expired */
1500         inf.worker = worker;
1501         inf.expired = *worker->env.now;
1502         inf.expired -= 3; /* handle 3 seconds skew between threads */
1503         inf.num_rrsets = 0;
1504         inf.num_msgs = 0;
1505         inf.num_keys = 0;
1506         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1507                 &bogus_del_rrset, &inf);
1508
1509         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1510
1511         /* and validator cache */
1512         if(worker->env.key_cache) {
1513                 slabhash_traverse(worker->env.key_cache->slab, 1,
1514                         &bogus_del_kcache, &inf);
1515         }
1516
1517         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1518                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1519                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1520 }
1521
1522 /** callback to delete negative and servfail rrsets */
1523 static void
1524 negative_del_rrset(struct lruhash_entry* e, void* arg)
1525 {
1526         /* entry is locked */
1527         struct del_info* inf = (struct del_info*)arg;
1528         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1529         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1530         /* delete the parentside negative cache rrsets,
1531          * these are namerserver rrsets that failed lookup, rdata empty */
1532         if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 &&
1533                 d->rrsig_count == 0 && d->rr_len[0] == 0) {
1534                 d->ttl = inf->expired;
1535                 inf->num_rrsets++;
1536         }
1537 }
1538
1539 /** callback to delete negative and servfail messages */
1540 static void
1541 negative_del_msg(struct lruhash_entry* e, void* arg)
1542 {
1543         /* entry is locked */
1544         struct del_info* inf = (struct del_info*)arg;
1545         struct reply_info* d = (struct reply_info*)e->data;
1546         /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error
1547          * or NOERROR rcode with ANCOUNT==0: a NODATA answer */
1548         if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) {
1549                 d->ttl = inf->expired;
1550                 inf->num_msgs++;
1551         }
1552 }
1553
1554 /** callback to delete negative key entries */
1555 static void
1556 negative_del_kcache(struct lruhash_entry* e, void* arg)
1557 {
1558         /* entry is locked */
1559         struct del_info* inf = (struct del_info*)arg;
1560         struct key_entry_data* d = (struct key_entry_data*)e->data;
1561         /* could be bad because of lookup failure on the DS, DNSKEY, which
1562          * was nxdomain or servfail, and thus a result of negative lookups */
1563         if(d->isbad) {
1564                 d->ttl = inf->expired;
1565                 inf->num_keys++;
1566         }
1567 }
1568
1569 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */
1570 static void
1571 do_flush_negative(SSL* ssl, struct worker* worker)
1572 {
1573         struct del_info inf;
1574         /* what we do is to set them all expired */
1575         inf.worker = worker;
1576         inf.expired = *worker->env.now;
1577         inf.expired -= 3; /* handle 3 seconds skew between threads */
1578         inf.num_rrsets = 0;
1579         inf.num_msgs = 0;
1580         inf.num_keys = 0;
1581         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1582                 &negative_del_rrset, &inf);
1583
1584         slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
1585
1586         /* and validator cache */
1587         if(worker->env.key_cache) {
1588                 slabhash_traverse(worker->env.key_cache->slab, 1,
1589                         &negative_del_kcache, &inf);
1590         }
1591
1592         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1593                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1594                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1595 }
1596
1597 /** remove name rrset from cache */
1598 static void
1599 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1600 {
1601         uint8_t* nm;
1602         int nmlabs;
1603         size_t nmlen;
1604         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1605                 return;
1606         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1607         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1608         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1609         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1610         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1611         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1612         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1613         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1614         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1615         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1616
1617         free(nm);
1618         send_ok(ssl);
1619 }
1620
1621 /** printout a delegation point info */
1622 static int
1623 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1624         struct delegpt* dp)
1625 {
1626         char buf[257];
1627         struct delegpt_ns* ns;
1628         struct delegpt_addr* a;
1629         int f = 0;
1630         if(str) { /* print header for forward, stub */
1631                 char* c = sldns_wire2str_class(dclass);
1632                 dname_str(nm, buf);
1633                 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) {
1634                         free(c);
1635                         return 0;
1636                 }
1637                 free(c);
1638         }
1639         for(ns = dp->nslist; ns; ns = ns->next) {
1640                 dname_str(ns->name, buf);
1641                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1642                         return 0;
1643                 f = 1;
1644         }
1645         for(a = dp->target_list; a; a = a->next_target) {
1646                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1647                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1648                         return 0;
1649                 f = 1;
1650         }
1651         return ssl_printf(ssl, "\n");
1652 }
1653
1654
1655 /** print root forwards */
1656 static int
1657 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1658 {
1659         struct delegpt* dp;
1660         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1661         if(!dp)
1662                 return ssl_printf(ssl, "off (using root hints)\n");
1663         /* if dp is returned it must be the root */
1664         log_assert(query_dname_compare(dp->name, root)==0);
1665         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1666 }
1667
1668 /** parse args into delegpt */
1669 static struct delegpt*
1670 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1671 {
1672         /* parse args and add in */
1673         char* p = args;
1674         char* todo;
1675         struct delegpt* dp = delegpt_create_mlc(nm);
1676         struct sockaddr_storage addr;
1677         socklen_t addrlen;
1678         if(!dp) {
1679                 (void)ssl_printf(ssl, "error out of memory\n");
1680                 return NULL;
1681         }
1682         while(p) {
1683                 todo = p;
1684                 p = strchr(p, ' '); /* find next spot, if any */
1685                 if(p) {
1686                         *p++ = 0;       /* end this spot */
1687                         p = skipwhite(p); /* position at next spot */
1688                 }
1689                 /* parse address */
1690                 if(!extstrtoaddr(todo, &addr, &addrlen)) {
1691                         if(allow_names) {
1692                                 uint8_t* n = NULL;
1693                                 size_t ln;
1694                                 int lb;
1695                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1696                                         (void)ssl_printf(ssl, "error cannot "
1697                                                 "parse IP address or name "
1698                                                 "'%s'\n", todo);
1699                                         delegpt_free_mlc(dp);
1700                                         return NULL;
1701                                 }
1702                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1703                                         (void)ssl_printf(ssl, "error out of memory\n");
1704                                         free(n);
1705                                         delegpt_free_mlc(dp);
1706                                         return NULL;
1707                                 }
1708                                 free(n);
1709
1710                         } else {
1711                                 (void)ssl_printf(ssl, "error cannot parse"
1712                                         " IP address '%s'\n", todo);
1713                                 delegpt_free_mlc(dp);
1714                                 return NULL;
1715                         }
1716                 } else {
1717                         /* add address */
1718                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
1719                                 (void)ssl_printf(ssl, "error out of memory\n");
1720                                 delegpt_free_mlc(dp);
1721                                 return NULL;
1722                         }
1723                 }
1724         }
1725         dp->has_parent_side_NS = 1;
1726         return dp;
1727 }
1728
1729 /** do the status command */
1730 static void
1731 do_forward(SSL* ssl, struct worker* worker, char* args)
1732 {
1733         struct iter_forwards* fwd = worker->env.fwds;
1734         uint8_t* root = (uint8_t*)"\000";
1735         if(!fwd) {
1736                 (void)ssl_printf(ssl, "error: structure not allocated\n");
1737                 return;
1738         }
1739         if(args == NULL || args[0] == 0) {
1740                 (void)print_root_fwds(ssl, fwd, root);
1741                 return;
1742         }
1743         /* set root forwards for this thread. since we are in remote control
1744          * the actual mesh is not running, so we can freely edit it. */
1745         /* delete all the existing queries first */
1746         mesh_delete_all(worker->env.mesh);
1747         if(strcmp(args, "off") == 0) {
1748                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
1749         } else {
1750                 struct delegpt* dp;
1751                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
1752                         return;
1753                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1754                         (void)ssl_printf(ssl, "error out of memory\n");
1755                         return;
1756                 }
1757         }
1758         send_ok(ssl);
1759 }
1760
1761 static int
1762 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
1763         int* insecure, int* prime)
1764 {
1765         char* zonename;
1766         char* rest;
1767         size_t nmlen;
1768         int nmlabs;
1769         /* parse all -x args */
1770         while(args[0] == '+') {
1771                 if(!find_arg2(ssl, args, &rest))
1772                         return 0;
1773                 while(*(++args) != 0) {
1774                         if(*args == 'i' && insecure)
1775                                 *insecure = 1;
1776                         else if(*args == 'p' && prime)
1777                                 *prime = 1;
1778                         else {
1779                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
1780                                 return 0;
1781                         }
1782                 }
1783                 args = rest;
1784         }
1785         /* parse name */
1786         if(dp) {
1787                 if(!find_arg2(ssl, args, &rest))
1788                         return 0;
1789                 zonename = args;
1790                 args = rest;
1791         } else  zonename = args;
1792         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
1793                 return 0;
1794
1795         /* parse dp */
1796         if(dp) {
1797                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
1798                         free(*nm);
1799                         return 0;
1800                 }
1801         }
1802         return 1;
1803 }
1804
1805 /** do the forward_add command */
1806 static void
1807 do_forward_add(SSL* ssl, struct worker* worker, char* args)
1808 {
1809         struct iter_forwards* fwd = worker->env.fwds;
1810         int insecure = 0;
1811         uint8_t* nm = NULL;
1812         struct delegpt* dp = NULL;
1813         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
1814                 return;
1815         if(insecure && worker->env.anchors) {
1816                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1817                         nm)) {
1818                         (void)ssl_printf(ssl, "error out of memory\n");
1819                         delegpt_free_mlc(dp);
1820                         free(nm);
1821                         return;
1822                 }
1823         }
1824         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1825                 (void)ssl_printf(ssl, "error out of memory\n");
1826                 free(nm);
1827                 return;
1828         }
1829         free(nm);
1830         send_ok(ssl);
1831 }
1832
1833 /** do the forward_remove command */
1834 static void
1835 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
1836 {
1837         struct iter_forwards* fwd = worker->env.fwds;
1838         int insecure = 0;
1839         uint8_t* nm = NULL;
1840         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1841                 return;
1842         if(insecure && worker->env.anchors)
1843                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1844                         nm);
1845         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
1846         free(nm);
1847         send_ok(ssl);
1848 }
1849
1850 /** do the stub_add command */
1851 static void
1852 do_stub_add(SSL* ssl, struct worker* worker, char* args)
1853 {
1854         struct iter_forwards* fwd = worker->env.fwds;
1855         int insecure = 0, prime = 0;
1856         uint8_t* nm = NULL;
1857         struct delegpt* dp = NULL;
1858         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
1859                 return;
1860         if(insecure && worker->env.anchors) {
1861                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1862                         nm)) {
1863                         (void)ssl_printf(ssl, "error out of memory\n");
1864                         delegpt_free_mlc(dp);
1865                         free(nm);
1866                         return;
1867                 }
1868         }
1869         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
1870                 if(insecure && worker->env.anchors)
1871                         anchors_delete_insecure(worker->env.anchors,
1872                                 LDNS_RR_CLASS_IN, nm);
1873                 (void)ssl_printf(ssl, "error out of memory\n");
1874                 delegpt_free_mlc(dp);
1875                 free(nm);
1876                 return;
1877         }
1878         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
1879                 (void)ssl_printf(ssl, "error out of memory\n");
1880                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1881                 if(insecure && worker->env.anchors)
1882                         anchors_delete_insecure(worker->env.anchors,
1883                                 LDNS_RR_CLASS_IN, nm);
1884                 free(nm);
1885                 return;
1886         }
1887         free(nm);
1888         send_ok(ssl);
1889 }
1890
1891 /** do the stub_remove command */
1892 static void
1893 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
1894 {
1895         struct iter_forwards* fwd = worker->env.fwds;
1896         int insecure = 0;
1897         uint8_t* nm = NULL;
1898         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1899                 return;
1900         if(insecure && worker->env.anchors)
1901                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1902                         nm);
1903         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1904         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
1905         free(nm);
1906         send_ok(ssl);
1907 }
1908
1909 /** do the insecure_add command */
1910 static void
1911 do_insecure_add(SSL* ssl, struct worker* worker, char* arg)
1912 {
1913         size_t nmlen;
1914         int nmlabs;
1915         uint8_t* nm = NULL;
1916         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1917                 return;
1918         if(worker->env.anchors) {
1919                 if(!anchors_add_insecure(worker->env.anchors,
1920                         LDNS_RR_CLASS_IN, nm)) {
1921                         (void)ssl_printf(ssl, "error out of memory\n");
1922                         free(nm);
1923                         return;
1924                 }
1925         }
1926         free(nm);
1927         send_ok(ssl);
1928 }
1929
1930 /** do the insecure_remove command */
1931 static void
1932 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg)
1933 {
1934         size_t nmlen;
1935         int nmlabs;
1936         uint8_t* nm = NULL;
1937         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1938                 return;
1939         if(worker->env.anchors)
1940                 anchors_delete_insecure(worker->env.anchors,
1941                         LDNS_RR_CLASS_IN, nm);
1942         free(nm);
1943         send_ok(ssl);
1944 }
1945
1946 static void
1947 do_insecure_list(SSL* ssl, struct worker* worker)
1948 {
1949         char buf[257];
1950         struct trust_anchor* a;
1951         if(worker->env.anchors) {
1952                 RBTREE_FOR(a, struct trust_anchor*, worker->env.anchors->tree) {
1953                         if(a->numDS == 0 && a->numDNSKEY == 0) {
1954                                 dname_str(a->name, buf);
1955                                 ssl_printf(ssl, "%s\n", buf);
1956                         }
1957                 }
1958         }
1959 }
1960
1961 /** do the status command */
1962 static void
1963 do_status(SSL* ssl, struct worker* worker)
1964 {
1965         int i;
1966         time_t uptime;
1967         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
1968                 return;
1969         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
1970                 return;
1971         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
1972                 return;
1973         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
1974                 return;
1975         for(i=0; i<worker->daemon->mods.num; i++) {
1976                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
1977                         return;
1978         }
1979         if(!ssl_printf(ssl, " ]\n"))
1980                 return;
1981         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
1982         if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
1983                 return;
1984         if(!ssl_printf(ssl, "options:%s%s\n" ,
1985                 (worker->daemon->reuseport?" reuseport":""),
1986                 (worker->daemon->rc->accept_list?" control(ssl)":"")))
1987                 return;
1988         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
1989                 (int)getpid()))
1990                 return;
1991 }
1992
1993 /** get age for the mesh state */
1994 static void
1995 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
1996         struct module_env* env)
1997 {
1998         if(m->reply_list) {
1999                 struct timeval d;
2000                 struct mesh_reply* r = m->reply_list;
2001                 /* last reply is the oldest */
2002                 while(r && r->next)
2003                         r = r->next;
2004                 timeval_subtract(&d, env->now_tv, &r->start_time);
2005                 snprintf(buf, len, ARG_LL "d.%6.6d",
2006                         (long long)d.tv_sec, (int)d.tv_usec);
2007         } else {
2008                 snprintf(buf, len, "-");
2009         }
2010 }
2011
2012 /** get status of a mesh state */
2013 static void
2014 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
2015         char* buf, size_t len)
2016 {
2017         enum module_ext_state s = m->s.ext_state[m->s.curmod];
2018         const char *modname = mesh->mods.mod[m->s.curmod]->name;
2019         size_t l;
2020         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
2021                 m->s.minfo[m->s.curmod]) {
2022                 /* break into iterator to find out who its waiting for */
2023                 struct iter_qstate* qstate = (struct iter_qstate*)
2024                         m->s.minfo[m->s.curmod];
2025                 struct outbound_list* ol = &qstate->outlist;
2026                 struct outbound_entry* e;
2027                 snprintf(buf, len, "%s wait for", modname);
2028                 l = strlen(buf);
2029                 buf += l; len -= l;
2030                 if(ol->first == NULL)
2031                         snprintf(buf, len, " (empty_list)");
2032                 for(e = ol->first; e; e = e->next) {
2033                         snprintf(buf, len, " ");
2034                         l = strlen(buf);
2035                         buf += l; len -= l;
2036                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
2037                                 buf, len);
2038                         l = strlen(buf);
2039                         buf += l; len -= l;
2040                 }
2041         } else if(s == module_wait_subquery) {
2042                 /* look in subs from mesh state to see what */
2043                 char nm[257];
2044                 struct mesh_state_ref* sub;
2045                 snprintf(buf, len, "%s wants", modname);
2046                 l = strlen(buf);
2047                 buf += l; len -= l;
2048                 if(m->sub_set.count == 0)
2049                         snprintf(buf, len, " (empty_list)");
2050                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
2051                         char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype);
2052                         char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
2053                         dname_str(sub->s->s.qinfo.qname, nm);
2054                         snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"),
2055                                 (c?c:"CLASS??"), nm);
2056                         l = strlen(buf);
2057                         buf += l; len -= l;
2058                         free(t);
2059                         free(c);
2060                 }
2061         } else {
2062                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
2063         }
2064 }
2065
2066 /** do the dump_requestlist command */
2067 static void
2068 do_dump_requestlist(SSL* ssl, struct worker* worker)
2069 {
2070         struct mesh_area* mesh;
2071         struct mesh_state* m;
2072         int num = 0;
2073         char buf[257];
2074         char timebuf[32];
2075         char statbuf[10240];
2076         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
2077                 return;
2078         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
2079                 return;
2080         /* show worker mesh contents */
2081         mesh = worker->env.mesh;
2082         if(!mesh) return;
2083         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
2084                 char* t = sldns_wire2str_type(m->s.qinfo.qtype);
2085                 char* c = sldns_wire2str_class(m->s.qinfo.qclass);
2086                 dname_str(m->s.qinfo.qname, buf);
2087                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
2088                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
2089                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
2090                         num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
2091                         statbuf)) {
2092                         free(t);
2093                         free(c);
2094                         return;
2095                 }
2096                 num++;
2097                 free(t);
2098                 free(c);
2099         }
2100 }
2101
2102 /** structure for argument data for dump infra host */
2103 struct infra_arg {
2104         /** the infra cache */
2105         struct infra_cache* infra;
2106         /** the SSL connection */
2107         SSL* ssl;
2108         /** the time now */
2109         time_t now;
2110         /** ssl failure? stop writing and skip the rest.  If the tcp
2111          * connection is broken, and writes fail, we then stop writing. */
2112         int ssl_failed;
2113 };
2114
2115 /** callback for every host element in the infra cache */
2116 static void
2117 dump_infra_host(struct lruhash_entry* e, void* arg)
2118 {
2119         struct infra_arg* a = (struct infra_arg*)arg;
2120         struct infra_key* k = (struct infra_key*)e->key;
2121         struct infra_data* d = (struct infra_data*)e->data;
2122         char ip_str[1024];
2123         char name[257];
2124         if(a->ssl_failed)
2125                 return;
2126         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
2127         dname_str(k->zonename, name);
2128         /* skip expired stuff (only backed off) */
2129         if(d->ttl < a->now) {
2130                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
2131                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
2132                                 name, d->rtt.rto))  {
2133                                 a->ssl_failed = 1;
2134                                 return;
2135                         }
2136                 }
2137                 return;
2138         }
2139         if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d "
2140                 "tA %d tAAAA %d tother %d "
2141                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
2142                 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now),
2143                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
2144                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
2145                 (int)d->edns_lame_known, (int)d->edns_version,
2146                 (int)(a->now<d->probedelay?(d->probedelay - a->now):0),
2147                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
2148                 (int)d->lame_other)) {
2149                 a->ssl_failed = 1;
2150                 return;
2151         }
2152 }
2153
2154 /** do the dump_infra command */
2155 static void
2156 do_dump_infra(SSL* ssl, struct worker* worker)
2157 {
2158         struct infra_arg arg;
2159         arg.infra = worker->env.infra_cache;
2160         arg.ssl = ssl;
2161         arg.now = *worker->env.now;
2162         arg.ssl_failed = 0;
2163         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
2164 }
2165
2166 /** do the log_reopen command */
2167 static void
2168 do_log_reopen(SSL* ssl, struct worker* worker)
2169 {
2170         struct config_file* cfg = worker->env.cfg;
2171         send_ok(ssl);
2172         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
2173 }
2174
2175 /** do the set_option command */
2176 static void
2177 do_set_option(SSL* ssl, struct worker* worker, char* arg)
2178 {
2179         char* arg2;
2180         if(!find_arg2(ssl, arg, &arg2))
2181                 return;
2182         if(!config_set_option(worker->env.cfg, arg, arg2)) {
2183                 (void)ssl_printf(ssl, "error setting option\n");
2184                 return;
2185         }
2186         send_ok(ssl);
2187 }
2188
2189 /* routine to printout option values over SSL */
2190 void remote_get_opt_ssl(char* line, void* arg)
2191 {
2192         SSL* ssl = (SSL*)arg;
2193         (void)ssl_printf(ssl, "%s\n", line);
2194 }
2195
2196 /** do the get_option command */
2197 static void
2198 do_get_option(SSL* ssl, struct worker* worker, char* arg)
2199 {
2200         int r;
2201         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
2202         if(!r) {
2203                 (void)ssl_printf(ssl, "error unknown option\n");
2204                 return;
2205         }
2206 }
2207
2208 /** do the list_forwards command */
2209 static void
2210 do_list_forwards(SSL* ssl, struct worker* worker)
2211 {
2212         /* since its a per-worker structure no locks needed */
2213         struct iter_forwards* fwds = worker->env.fwds;
2214         struct iter_forward_zone* z;
2215         struct trust_anchor* a;
2216         int insecure;
2217         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
2218                 if(!z->dp) continue; /* skip empty marker for stub */
2219
2220                 /* see if it is insecure */
2221                 insecure = 0;
2222                 if(worker->env.anchors &&
2223                         (a=anchor_find(worker->env.anchors, z->name,
2224                         z->namelabs, z->namelen,  z->dclass))) {
2225                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2226                                 insecure = 1;
2227                         lock_basic_unlock(&a->lock);
2228                 }
2229
2230                 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
2231                         z->name, z->dclass, z->dp))
2232                         return;
2233         }
2234 }
2235
2236 /** do the list_stubs command */
2237 static void
2238 do_list_stubs(SSL* ssl, struct worker* worker)
2239 {
2240         struct iter_hints_stub* z;
2241         struct trust_anchor* a;
2242         int insecure;
2243         char str[32];
2244         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
2245
2246                 /* see if it is insecure */
2247                 insecure = 0;
2248                 if(worker->env.anchors &&
2249                         (a=anchor_find(worker->env.anchors, z->node.name,
2250                         z->node.labs, z->node.len,  z->node.dclass))) {
2251                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2252                                 insecure = 1;
2253                         lock_basic_unlock(&a->lock);
2254                 }
2255
2256                 snprintf(str, sizeof(str), "stub %sprime%s",
2257                         (z->noprime?"no":""), (insecure?" +i":""));
2258                 if(!ssl_print_name_dp(ssl, str, z->node.name,
2259                         z->node.dclass, z->dp))
2260                         return;
2261         }
2262 }
2263
2264 /** do the list_local_zones command */
2265 static void
2266 do_list_local_zones(SSL* ssl, struct worker* worker)
2267 {
2268         struct local_zones* zones = worker->daemon->local_zones;
2269         struct local_zone* z;
2270         char buf[257];
2271         lock_rw_rdlock(&zones->lock);
2272         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2273                 lock_rw_rdlock(&z->lock);
2274                 dname_str(z->name, buf);
2275                 if(!ssl_printf(ssl, "%s %s\n", buf,
2276                         local_zone_type2str(z->type))) {
2277                         /* failure to print */
2278                         lock_rw_unlock(&z->lock);
2279                         lock_rw_unlock(&zones->lock);
2280                         return;
2281                 }
2282                 lock_rw_unlock(&z->lock);
2283         }
2284         lock_rw_unlock(&zones->lock);
2285 }
2286
2287 /** do the list_local_data command */
2288 static void
2289 do_list_local_data(SSL* ssl, struct worker* worker)
2290 {
2291         struct local_zones* zones = worker->daemon->local_zones;
2292         struct local_zone* z;
2293         struct local_data* d;
2294         struct local_rrset* p;
2295         char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer);
2296         size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer);
2297         lock_rw_rdlock(&zones->lock);
2298         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2299                 lock_rw_rdlock(&z->lock);
2300                 RBTREE_FOR(d, struct local_data*, &z->data) {
2301                         for(p = d->rrsets; p; p = p->next) {
2302                                 struct packed_rrset_data* d =
2303                                         (struct packed_rrset_data*)p->rrset->entry.data;
2304                                 size_t i;
2305                                 for(i=0; i<d->count + d->rrsig_count; i++) {
2306                                         if(!packed_rr_to_string(p->rrset, i,
2307                                                 0, s, slen)) {
2308                                                 if(!ssl_printf(ssl, "BADRR\n")) {
2309                                                         lock_rw_unlock(&z->lock);
2310                                                         lock_rw_unlock(&zones->lock);
2311                                                         return;
2312                                                 }
2313                                         }
2314                                         if(!ssl_printf(ssl, "%s\n", s)) {
2315                                                 lock_rw_unlock(&z->lock);
2316                                                 lock_rw_unlock(&zones->lock);
2317                                                 return;
2318                                         }
2319                                 }
2320                         }
2321                 }
2322                 lock_rw_unlock(&z->lock);
2323         }
2324         lock_rw_unlock(&zones->lock);
2325 }
2326
2327 /** struct for user arg ratelimit list */
2328 struct ratelimit_list_arg {
2329         /** the infra cache */
2330         struct infra_cache* infra;
2331         /** the SSL to print to */
2332         SSL* ssl;
2333         /** all or only ratelimited */
2334         int all;
2335         /** current time */
2336         time_t now;
2337 };
2338
2339 /** list items in the ratelimit table */
2340 static void
2341 rate_list(struct lruhash_entry* e, void* arg)
2342 {
2343         struct ratelimit_list_arg* a = (struct ratelimit_list_arg*)arg;
2344         struct rate_key* k = (struct rate_key*)e->key;
2345         struct rate_data* d = (struct rate_data*)e->data;
2346         char buf[257];
2347         int lim = infra_find_ratelimit(a->infra, k->name, k->namelen);
2348         int max = infra_rate_max(d, a->now);
2349         if(a->all == 0) {
2350                 if(max < lim)
2351                         return;
2352         }
2353         dname_str(k->name, buf);
2354         ssl_printf(a->ssl, "%s %d limit %d\n", buf, max, lim);
2355 }
2356
2357 /** do the ratelimit_list command */
2358 static void
2359 do_ratelimit_list(SSL* ssl, struct worker* worker, char* arg)
2360 {
2361         struct ratelimit_list_arg a;
2362         a.all = 0;
2363         a.infra = worker->env.infra_cache;
2364         a.now = *worker->env.now;
2365         a.ssl = ssl;
2366         arg = skipwhite(arg);
2367         if(strcmp(arg, "+a") == 0)
2368                 a.all = 1;
2369         if(a.infra->domain_rates==NULL ||
2370                 (a.all == 0 && infra_dp_ratelimit == 0))
2371                 return;
2372         slabhash_traverse(a.infra->domain_rates, 0, rate_list, &a);
2373 }
2374
2375 /** tell other processes to execute the command */
2376 static void
2377 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
2378 {
2379         int i;
2380         if(!cmd || !ssl)
2381                 return;
2382         /* skip i=0 which is me */
2383         for(i=1; i<rc->worker->daemon->num; i++) {
2384                 worker_send_cmd(rc->worker->daemon->workers[i],
2385                         worker_cmd_remote);
2386                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
2387                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
2388                         ssl_printf(ssl, "error could not distribute cmd\n");
2389                         return;
2390                 }
2391         }
2392 }
2393
2394 /** check for name with end-of-string, space or tab after it */
2395 static int
2396 cmdcmp(char* p, const char* cmd, size_t len)
2397 {
2398         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
2399 }
2400
2401 /** execute a remote control command */
2402 static void
2403 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
2404         struct worker* worker)
2405 {
2406         char* p = skipwhite(cmd);
2407         /* compare command */
2408         if(cmdcmp(p, "stop", 4)) {
2409                 do_stop(ssl, rc);
2410                 return;
2411         } else if(cmdcmp(p, "reload", 6)) {
2412                 do_reload(ssl, rc);
2413                 return;
2414         } else if(cmdcmp(p, "stats_noreset", 13)) {
2415                 do_stats(ssl, rc, 0);
2416                 return;
2417         } else if(cmdcmp(p, "stats", 5)) {
2418                 do_stats(ssl, rc, 1);
2419                 return;
2420         } else if(cmdcmp(p, "status", 6)) {
2421                 do_status(ssl, worker);
2422                 return;
2423         } else if(cmdcmp(p, "dump_cache", 10)) {
2424                 (void)dump_cache(ssl, worker);
2425                 return;
2426         } else if(cmdcmp(p, "load_cache", 10)) {
2427                 if(load_cache(ssl, worker)) send_ok(ssl);
2428                 return;
2429         } else if(cmdcmp(p, "list_forwards", 13)) {
2430                 do_list_forwards(ssl, worker);
2431                 return;
2432         } else if(cmdcmp(p, "list_stubs", 10)) {
2433                 do_list_stubs(ssl, worker);
2434                 return;
2435         } else if(cmdcmp(p, "list_insecure", 13)) {
2436                 do_insecure_list(ssl, worker);
2437                 return;
2438         } else if(cmdcmp(p, "list_local_zones", 16)) {
2439                 do_list_local_zones(ssl, worker);
2440                 return;
2441         } else if(cmdcmp(p, "list_local_data", 15)) {
2442                 do_list_local_data(ssl, worker);
2443                 return;
2444         } else if(cmdcmp(p, "ratelimit_list", 14)) {
2445                 do_ratelimit_list(ssl, worker, p+14);
2446                 return;
2447         } else if(cmdcmp(p, "stub_add", 8)) {
2448                 /* must always distribute this cmd */
2449                 if(rc) distribute_cmd(rc, ssl, cmd);
2450                 do_stub_add(ssl, worker, skipwhite(p+8));
2451                 return;
2452         } else if(cmdcmp(p, "stub_remove", 11)) {
2453                 /* must always distribute this cmd */
2454                 if(rc) distribute_cmd(rc, ssl, cmd);
2455                 do_stub_remove(ssl, worker, skipwhite(p+11));
2456                 return;
2457         } else if(cmdcmp(p, "forward_add", 11)) {
2458                 /* must always distribute this cmd */
2459                 if(rc) distribute_cmd(rc, ssl, cmd);
2460                 do_forward_add(ssl, worker, skipwhite(p+11));
2461                 return;
2462         } else if(cmdcmp(p, "forward_remove", 14)) {
2463                 /* must always distribute this cmd */
2464                 if(rc) distribute_cmd(rc, ssl, cmd);
2465                 do_forward_remove(ssl, worker, skipwhite(p+14));
2466                 return;
2467         } else if(cmdcmp(p, "insecure_add", 12)) {
2468                 /* must always distribute this cmd */
2469                 if(rc) distribute_cmd(rc, ssl, cmd);
2470                 do_insecure_add(ssl, worker, skipwhite(p+12));
2471                 return;
2472         } else if(cmdcmp(p, "insecure_remove", 15)) {
2473                 /* must always distribute this cmd */
2474                 if(rc) distribute_cmd(rc, ssl, cmd);
2475                 do_insecure_remove(ssl, worker, skipwhite(p+15));
2476                 return;
2477         } else if(cmdcmp(p, "forward", 7)) {
2478                 /* must always distribute this cmd */
2479                 if(rc) distribute_cmd(rc, ssl, cmd);
2480                 do_forward(ssl, worker, skipwhite(p+7));
2481                 return;
2482         } else if(cmdcmp(p, "flush_stats", 11)) {
2483                 /* must always distribute this cmd */
2484                 if(rc) distribute_cmd(rc, ssl, cmd);
2485                 do_flush_stats(ssl, worker);
2486                 return;
2487         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2488                 /* must always distribute this cmd */
2489                 if(rc) distribute_cmd(rc, ssl, cmd);
2490                 do_flush_requestlist(ssl, worker);
2491                 return;
2492         } else if(cmdcmp(p, "lookup", 6)) {
2493                 do_lookup(ssl, worker, skipwhite(p+6));
2494                 return;
2495         }
2496
2497 #ifdef THREADS_DISABLED
2498         /* other processes must execute the command as well */
2499         /* commands that should not be distributed, returned above. */
2500         if(rc) { /* only if this thread is the master (rc) thread */
2501                 /* done before the code below, which may split the string */
2502                 distribute_cmd(rc, ssl, cmd);
2503         }
2504 #endif
2505         if(cmdcmp(p, "verbosity", 9)) {
2506                 do_verbosity(ssl, skipwhite(p+9));
2507         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2508                 do_zone_remove(ssl, worker, skipwhite(p+17));
2509         } else if(cmdcmp(p, "local_zone", 10)) {
2510                 do_zone_add(ssl, worker, skipwhite(p+10));
2511         } else if(cmdcmp(p, "local_data_remove", 17)) {
2512                 do_data_remove(ssl, worker, skipwhite(p+17));
2513         } else if(cmdcmp(p, "local_data", 10)) {
2514                 do_data_add(ssl, worker, skipwhite(p+10));
2515         } else if(cmdcmp(p, "flush_zone", 10)) {
2516                 do_flush_zone(ssl, worker, skipwhite(p+10));
2517         } else if(cmdcmp(p, "flush_type", 10)) {
2518                 do_flush_type(ssl, worker, skipwhite(p+10));
2519         } else if(cmdcmp(p, "flush_infra", 11)) {
2520                 do_flush_infra(ssl, worker, skipwhite(p+11));
2521         } else if(cmdcmp(p, "flush", 5)) {
2522                 do_flush_name(ssl, worker, skipwhite(p+5));
2523         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2524                 do_dump_requestlist(ssl, worker);
2525         } else if(cmdcmp(p, "dump_infra", 10)) {
2526                 do_dump_infra(ssl, worker);
2527         } else if(cmdcmp(p, "log_reopen", 10)) {
2528                 do_log_reopen(ssl, worker);
2529         } else if(cmdcmp(p, "set_option", 10)) {
2530                 do_set_option(ssl, worker, skipwhite(p+10));
2531         } else if(cmdcmp(p, "get_option", 10)) {
2532                 do_get_option(ssl, worker, skipwhite(p+10));
2533         } else if(cmdcmp(p, "flush_bogus", 11)) {
2534                 do_flush_bogus(ssl, worker);
2535         } else if(cmdcmp(p, "flush_negative", 14)) {
2536                 do_flush_negative(ssl, worker);
2537         } else {
2538                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2539         }
2540 }
2541
2542 void
2543 daemon_remote_exec(struct worker* worker)
2544 {
2545         /* read the cmd string */
2546         uint8_t* msg = NULL;
2547         uint32_t len = 0;
2548         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2549                 log_err("daemon_remote_exec: tube_read_msg failed");
2550                 return;
2551         }
2552         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2553         execute_cmd(NULL, NULL, (char*)msg, worker);
2554         free(msg);
2555 }
2556
2557 /** handle remote control request */
2558 static void
2559 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2560 {
2561         int r;
2562         char pre[10];
2563         char magic[7];
2564         char buf[1024];
2565 #ifdef USE_WINSOCK
2566         /* makes it possible to set the socket blocking again. */
2567         /* basically removes it from winsock_event ... */
2568         WSAEventSelect(s->c->fd, NULL, 0);
2569 #endif
2570         fd_set_block(s->c->fd);
2571
2572         /* try to read magic UBCT[version]_space_ string */
2573         ERR_clear_error();
2574         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2575                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2576                         return;
2577                 log_crypto_err("could not SSL_read");
2578                 return;
2579         }
2580         magic[6] = 0;
2581         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2582                 verbose(VERB_QUERY, "control connection has bad magic string");
2583                 /* probably wrong tool connected, ignore it completely */
2584                 return;
2585         }
2586
2587         /* read the command line */
2588         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2589                 return;
2590         }
2591         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
2592         if(strcmp(magic, pre) != 0) {
2593                 verbose(VERB_QUERY, "control connection had bad "
2594                         "version %s, cmd: %s", magic, buf);
2595                 ssl_printf(ssl, "error version mismatch\n");
2596                 return;
2597         }
2598         verbose(VERB_DETAIL, "control cmd: %s", buf);
2599
2600         /* figure out what to do */
2601         execute_cmd(rc, ssl, buf, rc->worker);
2602 }
2603
2604 int remote_control_callback(struct comm_point* c, void* arg, int err,
2605         struct comm_reply* ATTR_UNUSED(rep))
2606 {
2607         struct rc_state* s = (struct rc_state*)arg;
2608         struct daemon_remote* rc = s->rc;
2609         int r;
2610         if(err != NETEVENT_NOERROR) {
2611                 if(err==NETEVENT_TIMEOUT)
2612                         log_err("remote control timed out");
2613                 clean_point(rc, s);
2614                 return 0;
2615         }
2616         /* (continue to) setup the SSL connection */
2617         ERR_clear_error();
2618         r = SSL_do_handshake(s->ssl);
2619         if(r != 1) {
2620                 int r2 = SSL_get_error(s->ssl, r);
2621                 if(r2 == SSL_ERROR_WANT_READ) {
2622                         if(s->shake_state == rc_hs_read) {
2623                                 /* try again later */
2624                                 return 0;
2625                         }
2626                         s->shake_state = rc_hs_read;
2627                         comm_point_listen_for_rw(c, 1, 0);
2628                         return 0;
2629                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
2630                         if(s->shake_state == rc_hs_write) {
2631                                 /* try again later */
2632                                 return 0;
2633                         }
2634                         s->shake_state = rc_hs_write;
2635                         comm_point_listen_for_rw(c, 0, 1);
2636                         return 0;
2637                 } else {
2638                         if(r == 0)
2639                                 log_err("remote control connection closed prematurely");
2640                         log_addr(1, "failed connection from",
2641                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
2642                         log_crypto_err("remote control failed ssl");
2643                         clean_point(rc, s);
2644                         return 0;
2645                 }
2646         }
2647         s->shake_state = rc_none;
2648
2649         /* once handshake has completed, check authentication */
2650         if (!rc->use_cert) {
2651                 verbose(VERB_ALGO, "unauthenticated remote control connection");
2652         } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
2653                 X509* x = SSL_get_peer_certificate(s->ssl);
2654                 if(!x) {
2655                         verbose(VERB_DETAIL, "remote control connection "
2656                                 "provided no client certificate");
2657                         clean_point(rc, s);
2658                         return 0;
2659                 }
2660                 verbose(VERB_ALGO, "remote control connection authenticated");
2661                 X509_free(x);
2662         } else {
2663                 verbose(VERB_DETAIL, "remote control connection failed to "
2664                         "authenticate with client certificate");
2665                 clean_point(rc, s);
2666                 return 0;
2667         }
2668
2669         /* if OK start to actually handle the request */
2670         handle_req(rc, s, s->ssl);
2671
2672         verbose(VERB_ALGO, "remote control operation completed");
2673         clean_point(rc, s);
2674         return 0;
2675 }