contrib/unbound/daemon/remote.c

   1 /*
   2  * daemon/remote.c - remote control for the unbound daemon.
   3  *
   4  * Copyright (c) 2008, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains the remote control functionality for the daemon.
  40  * The remote control can be performed using either the commandline
  41  * unbound-control tool, or a TLS capable web browser.
  42  * The channel is secured using TLSv1, and certificates.
  43  * Both the server and the client(control tool) have their own keys.
  44  */
  45 #include "config.h"
  46 #ifdef HAVE_OPENSSL_ERR_H
  47 #include <openssl/err.h>
  48 #endif
  49 #ifndef HEADER_DH_H
  50 #include <openssl/dh.h>
  51 #endif
  52
  53 #include <ctype.h>
  54 #include "daemon/remote.h"
  55 #include "daemon/worker.h"
  56 #include "daemon/daemon.h"
  57 #include "daemon/stats.h"
  58 #include "daemon/cachedump.h"
  59 #include "util/log.h"
  60 #include "util/config_file.h"
  61 #include "util/net_help.h"
  62 #include "util/module.h"
  63 #include "services/listen_dnsport.h"
  64 #include "services/cache/rrset.h"
  65 #include "services/cache/infra.h"
  66 #include "services/mesh.h"
  67 #include "services/localzone.h"
  68 #include "util/storage/slabhash.h"
  69 #include "util/fptr_wlist.h"
  70 #include "util/data/dname.h"
  71 #include "validator/validator.h"
  72 #include "validator/val_kcache.h"
  73 #include "validator/val_kentry.h"
  74 #include "validator/val_anchor.h"
  75 #include "iterator/iterator.h"
  76 #include "iterator/iter_fwd.h"
  77 #include "iterator/iter_hints.h"
  78 #include "iterator/iter_delegpt.h"
  79 #include "services/outbound_list.h"
  80 #include "services/outside_network.h"
  81 #include "ldns/str2wire.h"
  82 #include "ldns/parseutil.h"
  83 #include "ldns/wire2str.h"
  84 #include "ldns/sbuffer.h"
  85
  86 #ifdef HAVE_SYS_TYPES_H
  87 #  include <sys/types.h>
  88 #endif
  89 #ifdef HAVE_SYS_STAT_H
  90 #include <sys/stat.h>
  91 #endif
  92 #ifdef HAVE_NETDB_H
  93 #include <netdb.h>
  94 #endif
  95
  96 /* just for portability */
  97 #ifdef SQ
  98 #undef SQ
  99 #endif
 100
 101 /** what to put on statistics lines between var and value, ": " or "=" */
 102 #define SQ "="
 103 /** if true, inhibits a lot of =0 lines from the stats output */
 104 static const int inhibit_zero = 1;
 105
 106 /** subtract timers and the values do not overflow or become negative */
 107 static void
 108 timeval_subtract(struct timeval* d, const struct timeval* end,
 109         const struct timeval* start)
 110 {
 111 #ifndef S_SPLINT_S
 112         time_t end_usec = end->tv_usec;
 113         d->tv_sec = end->tv_sec - start->tv_sec;
 114         if(end_usec < start->tv_usec) {
 115                 end_usec += 1000000;
 116                 d->tv_sec--;
 117         }
 118         d->tv_usec = end_usec - start->tv_usec;
 119 #endif
 120 }
 121
 122 /** divide sum of timers to get average */
 123 static void
 124 timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
 125 {
 126 #ifndef S_SPLINT_S
 127         size_t leftover;
 128         if(d == 0) {
 129                 avg->tv_sec = 0;
 130                 avg->tv_usec = 0;
 131                 return;
 132         }
 133         avg->tv_sec = sum->tv_sec / d;
 134         avg->tv_usec = sum->tv_usec / d;
 135         /* handle fraction from seconds divide */
 136         leftover = sum->tv_sec - avg->tv_sec*d;
 137         avg->tv_usec += (leftover*1000000)/d;
 138 #endif
 139 }
 140
 141 /*
 142  * The following function was generated using the openssl utility, using
 143  * the command : "openssl dhparam -dsaparam -C 512"
 144  */
 145 #ifndef S_SPLINT_S
 146 DH *get_dh512()
 147 {
 148         static unsigned char dh512_p[]={
 149                 0xC9,0xD7,0x05,0xDA,0x5F,0xAB,0x14,0xE8,0x11,0x56,0x77,0x85,
 150                 0xB1,0x24,0x2C,0x95,0x60,0xEA,0xE2,0x10,0x6F,0x0F,0x84,0xEC,
 151                 0xF4,0x45,0xE8,0x90,0x7A,0xA7,0x03,0xFF,0x5B,0x88,0x53,0xDE,
 152                 0xC4,0xDE,0xBC,0x42,0x78,0x71,0x23,0x7E,0x24,0xA5,0x5E,0x4E,
 153                 0xEF,0x6F,0xFF,0x5F,0xAF,0xBE,0x8A,0x77,0x62,0xB4,0x65,0x82,
 154                 0x7E,0xC9,0xED,0x2F,
 155         };
 156         static unsigned char dh512_g[]={
 157                 0x8D,0x3A,0x52,0xBC,0x8A,0x71,0x94,0x33,0x2F,0xE1,0xE8,0x4C,
 158                 0x73,0x47,0x03,0x4E,0x7D,0x40,0xE5,0x84,0xA0,0xB5,0x6D,0x10,
 159                 0x6F,0x90,0x43,0x05,0x1A,0xF9,0x0B,0x6A,0xD1,0x2A,0x9C,0x25,
 160                 0x0A,0xB9,0xD1,0x14,0xDC,0x35,0x1C,0x48,0x7C,0xC6,0x0C,0x6D,
 161                 0x32,0x1D,0xD3,0xC8,0x10,0xA8,0x82,0x14,0xA2,0x1C,0xF4,0x53,
 162                 0x23,0x3B,0x1C,0xB9,
 163         };
 164         DH *dh;
 165
 166         if ((dh=DH_new()) == NULL) return(NULL);
 167         dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
 168         dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL);
 169         if ((dh->p == NULL) || (dh->g == NULL))
 170         { DH_free(dh); return(NULL); }
 171         dh->length = 160;
 172         return(dh);
 173 }
 174 #endif /* SPLINT */
 175
 176 struct daemon_remote*
 177 daemon_remote_create(struct config_file* cfg)
 178 {
 179         char* s_cert;
 180         char* s_key;
 181         struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 182                 sizeof(*rc));
 183         if(!rc) {
 184                 log_err("out of memory in daemon_remote_create");
 185                 return NULL;
 186         }
 187         rc->max_active = 10;
 188
 189         if(!cfg->remote_control_enable) {
 190                 rc->ctx = NULL;
 191                 return rc;
 192         }
 193         rc->ctx = SSL_CTX_new(SSLv23_server_method());
 194         if(!rc->ctx) {
 195                 log_crypto_err("could not SSL_CTX_new");
 196                 free(rc);
 197                 return NULL;
 198         }
 199         /* no SSLv2, SSLv3 because has defects */
 200         if(!(SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)){
 201                 log_crypto_err("could not set SSL_OP_NO_SSLv2");
 202                 daemon_remote_delete(rc);
 203                 return NULL;
 204         }
 205         if(!(SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3)){
 206                 log_crypto_err("could not set SSL_OP_NO_SSLv3");
 207                 daemon_remote_delete(rc);
 208                 return NULL;
 209         }
 210
 211         if (cfg->remote_control_use_cert == 0) {
 212                 /* No certificates are requested */
 213                 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL")) {
 214                         log_crypto_err("Failed to set aNULL cipher list");
 215                         return NULL;
 216                 }
 217
 218                 /* Since we have no certificates and hence no source of
 219                  * DH params, let's generate and set them
 220                  */
 221                 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh512())) {
 222                         log_crypto_err("Wanted to set DH param, but failed");
 223                         return NULL;
 224                 }
 225                 return rc;
 226         }
 227         rc->use_cert = 1;
 228         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 229         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 230         if(!s_cert || !s_key) {
 231                 log_err("out of memory in remote control fname");
 232                 goto setup_error;
 233         }
 234         verbose(VERB_ALGO, "setup SSL certificates");
 235         if (!SSL_CTX_use_certificate_file(rc->ctx,s_cert,SSL_FILETYPE_PEM)) {
 236                 log_err("Error for server-cert-file: %s", s_cert);
 237                 log_crypto_err("Error in SSL_CTX use_certificate_file");
 238                 goto setup_error;
 239         }
 240         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 241                 log_err("Error for server-key-file: %s", s_key);
 242                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 243                 goto setup_error;
 244         }
 245         if(!SSL_CTX_check_private_key(rc->ctx)) {
 246                 log_err("Error for server-key-file: %s", s_key);
 247                 log_crypto_err("Error in SSL_CTX check_private_key");
 248                 goto setup_error;
 249         }
 250         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 251                 log_crypto_err("Error setting up SSL_CTX verify locations");
 252         setup_error:
 253                 free(s_cert);
 254                 free(s_key);
 255                 daemon_remote_delete(rc);
 256                 return NULL;
 257         }
 258         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 259         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 260         free(s_cert);
 261         free(s_key);
 262
 263         return rc;
 264 }
 265
 266 void daemon_remote_clear(struct daemon_remote* rc)
 267 {
 268         struct rc_state* p, *np;
 269         if(!rc) return;
 270         /* but do not close the ports */
 271         listen_list_delete(rc->accept_list);
 272         rc->accept_list = NULL;
 273         /* do close these sockets */
 274         p = rc->busy_list;
 275         while(p) {
 276                 np = p->next;
 277                 if(p->ssl)
 278                         SSL_free(p->ssl);
 279                 comm_point_delete(p->c);
 280                 free(p);
 281                 p = np;
 282         }
 283         rc->busy_list = NULL;
 284         rc->active = 0;
 285         rc->worker = NULL;
 286 }
 287
 288 void daemon_remote_delete(struct daemon_remote* rc)
 289 {
 290         if(!rc) return;
 291         daemon_remote_clear(rc);
 292         if(rc->ctx) {
 293                 SSL_CTX_free(rc->ctx);
 294         }
 295         free(rc);
 296 }
 297
 298 /**
 299  * Add and open a new control port
 300  * @param ip: ip str
 301  * @param nr: port nr
 302  * @param list: list head
 303  * @param noproto_is_err: if lack of protocol support is an error.
 304  * @param cfg: config with username for chown of unix-sockets.
 305  * @return false on failure.
 306  */
 307 static int
 308 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
 309         struct config_file* cfg)
 310 {
 311         struct addrinfo hints;
 312         struct addrinfo* res;
 313         struct listen_port* n;
 314         int noproto;
 315         int fd, r;
 316         char port[15];
 317         snprintf(port, sizeof(port), "%d", nr);
 318         port[sizeof(port)-1]=0;
 319         memset(&hints, 0, sizeof(hints));
 320
 321         if(ip[0] == '/') {
 322                 /* This looks like a local socket */
 323                 fd = create_local_accept_sock(ip, &noproto);
 324                 /*
 325                  * Change socket ownership and permissions so users other
 326                  * than root can access it provided they are in the same
 327                  * group as the user we run as.
 328                  */
 329                 if(fd != -1) {
 330                         if (cfg->username && cfg->username[0])
 331                                 chown(ip, cfg->uid, cfg->gid);
 332                         chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
 333                 }
 334         } else {
 335                 hints.ai_socktype = SOCK_STREAM;
 336                 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 337                 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 338 #ifdef USE_WINSOCK
 339                         if(!noproto_is_err && r == EAI_NONAME) {
 340                                 /* tried to lookup the address as name */
 341                                 return 1; /* return success, but do nothing */
 342                         }
 343 #endif /* USE_WINSOCK */
 344                         log_err("control interface %s:%s getaddrinfo: %s %s",
 345                                 ip?ip:"default", port, gai_strerror(r),
 346 #ifdef EAI_SYSTEM
 347                                 r==EAI_SYSTEM?(char*)strerror(errno):""
 348 #else
 349                                 ""
 350 #endif
 351                         );
 352                         return 0;
 353                 }
 354
 355                 /* open fd */
 356                 fd = create_tcp_accept_sock(res, 1, &noproto, 0);
 357                 freeaddrinfo(res);
 358         }
 359
 360         if(fd == -1 && noproto) {
 361                 if(!noproto_is_err)
 362                         return 1; /* return success, but do nothing */
 363                 log_err("cannot open control interface %s %d : "
 364                         "protocol not supported", ip, nr);
 365                 return 0;
 366         }
 367         if(fd == -1) {
 368                 log_err("cannot open control interface %s %d", ip, nr);
 369                 return 0;
 370         }
 371
 372         /* alloc */
 373         n = (struct listen_port*)calloc(1, sizeof(*n));
 374         if(!n) {
 375 #ifndef USE_WINSOCK
 376                 close(fd);
 377 #else
 378                 closesocket(fd);
 379 #endif
 380                 log_err("out of memory");
 381                 return 0;
 382         }
 383         n->next = *list;
 384         *list = n;
 385         n->fd = fd;
 386         return 1;
 387 }
 388
 389 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 390 {
 391         struct listen_port* l = NULL;
 392         log_assert(cfg->remote_control_enable && cfg->control_port);
 393         if(cfg->control_ifs) {
 394                 struct config_strlist* p;
 395                 for(p = cfg->control_ifs; p; p = p->next) {
 396                         if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
 397                                 listening_ports_free(l);
 398                                 return NULL;
 399                         }
 400                 }
 401         } else {
 402                 /* defaults */
 403                 if(cfg->do_ip6 &&
 404                         !add_open("::1", cfg->control_port, &l, 0, cfg)) {
 405                         listening_ports_free(l);
 406                         return NULL;
 407                 }
 408                 if(cfg->do_ip4 &&
 409                         !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
 410                         listening_ports_free(l);
 411                         return NULL;
 412                 }
 413         }
 414         return l;
 415 }
 416
 417 /** open accept commpoint */
 418 static int
 419 accept_open(struct daemon_remote* rc, int fd)
 420 {
 421         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 422         if(!n) {
 423                 log_err("out of memory");
 424                 return 0;
 425         }
 426         n->next = rc->accept_list;
 427         rc->accept_list = n;
 428         /* open commpt */
 429         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 430                 &remote_accept_callback, rc);
 431         if(!n->com)
 432                 return 0;
 433         /* keep this port open, its fd is kept in the rc portlist */
 434         n->com->do_not_close = 1;
 435         return 1;
 436 }
 437
 438 int daemon_remote_open_accept(struct daemon_remote* rc,
 439         struct listen_port* ports, struct worker* worker)
 440 {
 441         struct listen_port* p;
 442         rc->worker = worker;
 443         for(p = ports; p; p = p->next) {
 444                 if(!accept_open(rc, p->fd)) {
 445                         log_err("could not create accept comm point");
 446                         return 0;
 447                 }
 448         }
 449         return 1;
 450 }
 451
 452 void daemon_remote_stop_accept(struct daemon_remote* rc)
 453 {
 454         struct listen_list* p;
 455         for(p=rc->accept_list; p; p=p->next) {
 456                 comm_point_stop_listening(p->com);
 457         }
 458 }
 459
 460 void daemon_remote_start_accept(struct daemon_remote* rc)
 461 {
 462         struct listen_list* p;
 463         for(p=rc->accept_list; p; p=p->next) {
 464                 comm_point_start_listening(p->com, -1, -1);
 465         }
 466 }
 467
 468 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 469         struct comm_reply* ATTR_UNUSED(rep))
 470 {
 471         struct daemon_remote* rc = (struct daemon_remote*)arg;
 472         struct sockaddr_storage addr;
 473         socklen_t addrlen;
 474         int newfd;
 475         struct rc_state* n;
 476         if(err != NETEVENT_NOERROR) {
 477                 log_err("error %d on remote_accept_callback", err);
 478                 return 0;
 479         }
 480         /* perform the accept */
 481         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 482         if(newfd == -1)
 483                 return 0;
 484         /* create new commpoint unless we are servicing already */
 485         if(rc->active >= rc->max_active) {
 486                 log_warn("drop incoming remote control: too many connections");
 487         close_exit:
 488 #ifndef USE_WINSOCK
 489                 close(newfd);
 490 #else
 491                 closesocket(newfd);
 492 #endif
 493                 return 0;
 494         }
 495
 496         /* setup commpoint to service the remote control command */
 497         n = (struct rc_state*)calloc(1, sizeof(*n));
 498         if(!n) {
 499                 log_err("out of memory");
 500                 goto close_exit;
 501         }
 502         /* start in reading state */
 503         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 504                 &remote_control_callback, n);
 505         if(!n->c) {
 506                 log_err("out of memory");
 507                 free(n);
 508                 goto close_exit;
 509         }
 510         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 511         n->c->do_not_close = 0;
 512         comm_point_stop_listening(n->c);
 513         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 514         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 515         n->c->repinfo.addrlen = addrlen;
 516         n->shake_state = rc_hs_read;
 517         n->ssl = SSL_new(rc->ctx);
 518         if(!n->ssl) {
 519                 log_crypto_err("could not SSL_new");
 520                 comm_point_delete(n->c);
 521                 free(n);
 522                 goto close_exit;
 523         }
 524         SSL_set_accept_state(n->ssl);
 525         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 526         if(!SSL_set_fd(n->ssl, newfd)) {
 527                 log_crypto_err("could not SSL_set_fd");
 528                 SSL_free(n->ssl);
 529                 comm_point_delete(n->c);
 530                 free(n);
 531                 goto close_exit;
 532         }
 533
 534         n->rc = rc;
 535         n->next = rc->busy_list;
 536         rc->busy_list = n;
 537         rc->active ++;
 538
 539         /* perform the first nonblocking read already, for windows,
 540          * so it can return wouldblock. could be faster too. */
 541         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 542         return 0;
 543 }
 544
 545 /** delete from list */
 546 static void
 547 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 548 {
 549         while(*list) {
 550                 if( (*list)->c == c) {
 551                         *list = (*list)->next;
 552                         return;
 553                 }
 554                 list = &(*list)->next;
 555         }
 556 }
 557
 558 /** decrease active count and remove commpoint from busy list */
 559 static void
 560 clean_point(struct daemon_remote* rc, struct rc_state* s)
 561 {
 562         state_list_remove_elem(&rc->busy_list, s->c);
 563         rc->active --;
 564         if(s->ssl) {
 565                 SSL_shutdown(s->ssl);
 566                 SSL_free(s->ssl);
 567         }
 568         comm_point_delete(s->c);
 569         free(s);
 570 }
 571
 572 int
 573 ssl_print_text(SSL* ssl, const char* text)
 574 {
 575         int r;
 576         if(!ssl)
 577                 return 0;
 578         ERR_clear_error();
 579         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 580                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 581                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 582                                 "closed connection");
 583                         return 0;
 584                 }
 585                 log_crypto_err("could not SSL_write");
 586                 return 0;
 587         }
 588         return 1;
 589 }
 590
 591 /** print text over the ssl connection */
 592 static int
 593 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 594 {
 595         char msg[1024];
 596         vsnprintf(msg, sizeof(msg), format, args);
 597         return ssl_print_text(ssl, msg);
 598 }
 599
 600 /** printf style printing to the ssl connection */
 601 int ssl_printf(SSL* ssl, const char* format, ...)
 602 {
 603         va_list args;
 604         int ret;
 605         va_start(args, format);
 606         ret = ssl_print_vmsg(ssl, format, args);
 607         va_end(args);
 608         return ret;
 609 }
 610
 611 int
 612 ssl_read_line(SSL* ssl, char* buf, size_t max)
 613 {
 614         int r;
 615         size_t len = 0;
 616         if(!ssl)
 617                 return 0;
 618         while(len < max) {
 619                 ERR_clear_error();
 620                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 621                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 622                                 buf[len] = 0;
 623                                 return 1;
 624                         }
 625                         log_crypto_err("could not SSL_read");
 626                         return 0;
 627                 }
 628                 if(buf[len] == '\n') {
 629                         /* return string without \n */
 630                         buf[len] = 0;
 631                         return 1;
 632                 }
 633                 len++;
 634         }
 635         buf[max-1] = 0;
 636         log_err("control line too long (%d): %s", (int)max, buf);
 637         return 0;
 638 }
 639
 640 /** skip whitespace, return new pointer into string */
 641 static char*
 642 skipwhite(char* str)
 643 {
 644         /* EOS \0 is not a space */
 645         while( isspace((unsigned char)*str) )
 646                 str++;
 647         return str;
 648 }
 649
 650 /** send the OK to the control client */
 651 static void send_ok(SSL* ssl)
 652 {
 653         (void)ssl_printf(ssl, "ok\n");
 654 }
 655
 656 /** do the stop command */
 657 static void
 658 do_stop(SSL* ssl, struct daemon_remote* rc)
 659 {
 660         rc->worker->need_to_exit = 1;
 661         comm_base_exit(rc->worker->base);
 662         send_ok(ssl);
 663 }
 664
 665 /** do the reload command */
 666 static void
 667 do_reload(SSL* ssl, struct daemon_remote* rc)
 668 {
 669         rc->worker->need_to_exit = 0;
 670         comm_base_exit(rc->worker->base);
 671         send_ok(ssl);
 672 }
 673
 674 /** do the verbosity command */
 675 static void
 676 do_verbosity(SSL* ssl, char* str)
 677 {
 678         int val = atoi(str);
 679         if(val == 0 && strcmp(str, "0") != 0) {
 680                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 681                 return;
 682         }
 683         verbosity = val;
 684         send_ok(ssl);
 685 }
 686
 687 /** print stats from statinfo */
 688 static int
 689 print_stats(SSL* ssl, const char* nm, struct stats_info* s)
 690 {
 691         struct timeval avg;
 692         if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm,
 693                 (unsigned long)s->svr.num_queries)) return 0;
 694         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm,
 695                 (unsigned long)(s->svr.num_queries
 696                         - s->svr.num_queries_missed_cache))) return 0;
 697         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm,
 698                 (unsigned long)s->svr.num_queries_missed_cache)) return 0;
 699         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm,
 700                 (unsigned long)s->svr.num_queries_prefetch)) return 0;
 701         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm,
 702                 (unsigned long)s->mesh_replies_sent)) return 0;
 703         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 704                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 705                         (double)s->svr.sum_query_list_size/
 706                         (s->svr.num_queries_missed_cache+
 707                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 708         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm,
 709                 (unsigned long)s->svr.max_query_list_size)) return 0;
 710         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm,
 711                 (unsigned long)s->mesh_jostled)) return 0;
 712         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm,
 713                 (unsigned long)s->mesh_dropped)) return 0;
 714         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm,
 715                 (unsigned long)s->mesh_num_states)) return 0;
 716         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm,
 717                 (unsigned long)s->mesh_num_reply_states)) return 0;
 718         timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
 719         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm,
 720                 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0;
 721         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 722                 s->mesh_time_median)) return 0;
 723         return 1;
 724 }
 725
 726 /** print stats for one thread */
 727 static int
 728 print_thread_stats(SSL* ssl, int i, struct stats_info* s)
 729 {
 730         char nm[16];
 731         snprintf(nm, sizeof(nm), "thread%d", i);
 732         nm[sizeof(nm)-1]=0;
 733         return print_stats(ssl, nm, s);
 734 }
 735
 736 /** print long number */
 737 static int
 738 print_longnum(SSL* ssl, const char* desc, size_t x)
 739 {
 740         if(x > 1024*1024*1024) {
 741                 /* more than a Gb */
 742                 size_t front = x / (size_t)1000000;
 743                 size_t back = x % (size_t)1000000;
 744                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 745                         (unsigned)front, (unsigned)back);
 746         } else {
 747                 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x);
 748         }
 749 }
 750
 751 /** print mem stats */
 752 static int
 753 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 754 {
 755         int m;
 756         size_t msg, rrset, val, iter;
 757 #ifdef HAVE_SBRK
 758         extern void* unbound_start_brk;
 759         void* cur = sbrk(0);
 760         if(!print_longnum(ssl, "mem.total.sbrk"SQ,
 761                 (size_t)((char*)cur - (char*)unbound_start_brk))) return 0;
 762 #endif /* HAVE_SBRK */
 763         msg = slabhash_get_mem(daemon->env->msg_cache);
 764         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 765         val=0;
 766         iter=0;
 767         m = modstack_find(&worker->env.mesh->mods, "validator");
 768         if(m != -1) {
 769                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 770                         mods.mod[m]->get_mem));
 771                 val = (*worker->env.mesh->mods.mod[m]->get_mem)
 772                         (&worker->env, m);
 773         }
 774         m = modstack_find(&worker->env.mesh->mods, "iterator");
 775         if(m != -1) {
 776                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 777                         mods.mod[m]->get_mem));
 778                 iter = (*worker->env.mesh->mods.mod[m]->get_mem)
 779                         (&worker->env, m);
 780         }
 781
 782         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 783                 return 0;
 784         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 785                 return 0;
 786         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 787                 return 0;
 788         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 789                 return 0;
 790         return 1;
 791 }
 792
 793 /** print uptime stats */
 794 static int
 795 print_uptime(SSL* ssl, struct worker* worker, int reset)
 796 {
 797         struct timeval now = *worker->env.now_tv;
 798         struct timeval up, dt;
 799         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 800         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 801         if(reset)
 802                 worker->daemon->time_last_stat = now;
 803         if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n",
 804                 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 805         if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n",
 806                 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 807         if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n",
 808                 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 809         return 1;
 810 }
 811
 812 /** print extended histogram */
 813 static int
 814 print_hist(SSL* ssl, struct stats_info* s)
 815 {
 816         struct timehist* hist;
 817         size_t i;
 818         hist = timehist_setup();
 819         if(!hist) {
 820                 log_err("out of memory");
 821                 return 0;
 822         }
 823         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 824         for(i=0; i<hist->num; i++) {
 825                 if(!ssl_printf(ssl,
 826                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
 827                         (int)hist->buckets[i].lower.tv_sec,
 828                         (int)hist->buckets[i].lower.tv_usec,
 829                         (int)hist->buckets[i].upper.tv_sec,
 830                         (int)hist->buckets[i].upper.tv_usec,
 831                         (unsigned long)hist->buckets[i].count)) {
 832                         timehist_delete(hist);
 833                         return 0;
 834                 }
 835         }
 836         timehist_delete(hist);
 837         return 1;
 838 }
 839
 840 /** print extended stats */
 841 static int
 842 print_ext(SSL* ssl, struct stats_info* s)
 843 {
 844         int i;
 845         char nm[16];
 846         const sldns_rr_descriptor* desc;
 847         const sldns_lookup_table* lt;
 848         /* TYPE */
 849         for(i=0; i<STATS_QTYPE_NUM; i++) {
 850                 if(inhibit_zero && s->svr.qtype[i] == 0)
 851                         continue;
 852                 desc = sldns_rr_descript((uint16_t)i);
 853                 if(desc && desc->_name) {
 854                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 855                 } else if (i == LDNS_RR_TYPE_IXFR) {
 856                         snprintf(nm, sizeof(nm), "IXFR");
 857                 } else if (i == LDNS_RR_TYPE_AXFR) {
 858                         snprintf(nm, sizeof(nm), "AXFR");
 859                 } else if (i == LDNS_RR_TYPE_MAILA) {
 860                         snprintf(nm, sizeof(nm), "MAILA");
 861                 } else if (i == LDNS_RR_TYPE_MAILB) {
 862                         snprintf(nm, sizeof(nm), "MAILB");
 863                 } else if (i == LDNS_RR_TYPE_ANY) {
 864                         snprintf(nm, sizeof(nm), "ANY");
 865                 } else {
 866                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 867                 }
 868                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n",
 869                         nm, (unsigned long)s->svr.qtype[i])) return 0;
 870         }
 871         if(!inhibit_zero || s->svr.qtype_big) {
 872                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n",
 873                         (unsigned long)s->svr.qtype_big)) return 0;
 874         }
 875         /* CLASS */
 876         for(i=0; i<STATS_QCLASS_NUM; i++) {
 877                 if(inhibit_zero && s->svr.qclass[i] == 0)
 878                         continue;
 879                 lt = sldns_lookup_by_id(sldns_rr_classes, i);
 880                 if(lt && lt->name) {
 881                         snprintf(nm, sizeof(nm), "%s", lt->name);
 882                 } else {
 883                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 884                 }
 885                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n",
 886                         nm, (unsigned long)s->svr.qclass[i])) return 0;
 887         }
 888         if(!inhibit_zero || s->svr.qclass_big) {
 889                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n",
 890                         (unsigned long)s->svr.qclass_big)) return 0;
 891         }
 892         /* OPCODE */
 893         for(i=0; i<STATS_OPCODE_NUM; i++) {
 894                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 895                         continue;
 896                 lt = sldns_lookup_by_id(sldns_opcodes, i);
 897                 if(lt && lt->name) {
 898                         snprintf(nm, sizeof(nm), "%s", lt->name);
 899                 } else {
 900                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 901                 }
 902                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n",
 903                         nm, (unsigned long)s->svr.qopcode[i])) return 0;
 904         }
 905         /* transport */
 906         if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n",
 907                 (unsigned long)s->svr.qtcp)) return 0;
 908         if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n",
 909                 (unsigned long)s->svr.qtcp_outgoing)) return 0;
 910         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n",
 911                 (unsigned long)s->svr.qipv6)) return 0;
 912         /* flags */
 913         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n",
 914                 (unsigned long)s->svr.qbit_QR)) return 0;
 915         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n",
 916                 (unsigned long)s->svr.qbit_AA)) return 0;
 917         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n",
 918                 (unsigned long)s->svr.qbit_TC)) return 0;
 919         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n",
 920                 (unsigned long)s->svr.qbit_RD)) return 0;
 921         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n",
 922                 (unsigned long)s->svr.qbit_RA)) return 0;
 923         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n",
 924                 (unsigned long)s->svr.qbit_Z)) return 0;
 925         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n",
 926                 (unsigned long)s->svr.qbit_AD)) return 0;
 927         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n",
 928                 (unsigned long)s->svr.qbit_CD)) return 0;
 929         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n",
 930                 (unsigned long)s->svr.qEDNS)) return 0;
 931         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n",
 932                 (unsigned long)s->svr.qEDNS_DO)) return 0;
 933
 934         /* RCODE */
 935         for(i=0; i<STATS_RCODE_NUM; i++) {
 936                 /* Always include RCODEs 0-5 */
 937                 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
 938                         continue;
 939                 lt = sldns_lookup_by_id(sldns_rcodes, i);
 940                 if(lt && lt->name) {
 941                         snprintf(nm, sizeof(nm), "%s", lt->name);
 942                 } else {
 943                         snprintf(nm, sizeof(nm), "RCODE%d", i);
 944                 }
 945                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n",
 946                         nm, (unsigned long)s->svr.ans_rcode[i])) return 0;
 947         }
 948         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
 949                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n",
 950                         (unsigned long)s->svr.ans_rcode_nodata)) return 0;
 951         }
 952         /* validation */
 953         if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n",
 954                 (unsigned long)s->svr.ans_secure)) return 0;
 955         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n",
 956                 (unsigned long)s->svr.ans_bogus)) return 0;
 957         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n",
 958                 (unsigned long)s->svr.rrset_bogus)) return 0;
 959         /* threat detection */
 960         if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n",
 961                 (unsigned long)s->svr.unwanted_queries)) return 0;
 962         if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n",
 963                 (unsigned long)s->svr.unwanted_replies)) return 0;
 964         /* cache counts */
 965         if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n",
 966                 (unsigned)s->svr.msg_cache_count)) return 0;
 967         if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n",
 968                 (unsigned)s->svr.rrset_cache_count)) return 0;
 969         if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n",
 970                 (unsigned)s->svr.infra_cache_count)) return 0;
 971         if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n",
 972                 (unsigned)s->svr.key_cache_count)) return 0;
 973         return 1;
 974 }
 975
 976 /** do the stats command */
 977 static void
 978 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
 979 {
 980         struct daemon* daemon = rc->worker->daemon;
 981         struct stats_info total;
 982         struct stats_info s;
 983         int i;
 984         log_assert(daemon->num > 0);
 985         /* gather all thread statistics in one place */
 986         for(i=0; i<daemon->num; i++) {
 987                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
 988                 if(!print_thread_stats(ssl, i, &s))
 989                         return;
 990                 if(i == 0)
 991                         total = s;
 992                 else    server_stats_add(&total, &s);
 993         }
 994         /* print the thread statistics */
 995         total.mesh_time_median /= (double)daemon->num;
 996         if(!print_stats(ssl, "total", &total))
 997                 return;
 998         if(!print_uptime(ssl, rc->worker, reset))
 999                 return;
1000         if(daemon->cfg->stat_extended) {
1001                 if(!print_mem(ssl, rc->worker, daemon))
1002                         return;
1003                 if(!print_hist(ssl, &total))
1004                         return;
1005                 if(!print_ext(ssl, &total))
1006                         return;
1007         }
1008 }
1009
1010 /** parse commandline argument domain name */
1011 static int
1012 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
1013 {
1014         uint8_t nm[LDNS_MAX_DOMAINLEN+1];
1015         size_t nmlen = sizeof(nm);
1016         int status;
1017         *res = NULL;
1018         *len = 0;
1019         *labs = 0;
1020         status = sldns_str2wire_dname_buf(str, nm, &nmlen);
1021         if(status != 0) {
1022                 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str,
1023                         LDNS_WIREPARSE_OFFSET(status),
1024                         sldns_get_errorstr_parse(status));
1025                 return 0;
1026         }
1027         *res = memdup(nm, nmlen);
1028         if(!*res) {
1029                 ssl_printf(ssl, "error out of memory\n");
1030                 return 0;
1031         }
1032         *labs = dname_count_size_labels(*res, len);
1033         return 1;
1034 }
1035
1036 /** find second argument, modifies string */
1037 static int
1038 find_arg2(SSL* ssl, char* arg, char** arg2)
1039 {
1040         char* as = strchr(arg, ' ');
1041         char* at = strchr(arg, '\t');
1042         if(as && at) {
1043                 if(at < as)
1044                         as = at;
1045                 as[0]=0;
1046                 *arg2 = skipwhite(as+1);
1047         } else if(as) {
1048                 as[0]=0;
1049                 *arg2 = skipwhite(as+1);
1050         } else if(at) {
1051                 at[0]=0;
1052                 *arg2 = skipwhite(at+1);
1053         } else {
1054                 ssl_printf(ssl, "error could not find next argument "
1055                         "after %s\n", arg);
1056                 return 0;
1057         }
1058         return 1;
1059 }
1060
1061 /** Add a new zone */
1062 static void
1063 do_zone_add(SSL* ssl, struct worker* worker, char* arg)
1064 {
1065         uint8_t* nm;
1066         int nmlabs;
1067         size_t nmlen;
1068         char* arg2;
1069         enum localzone_type t;
1070         struct local_zone* z;
1071         if(!find_arg2(ssl, arg, &arg2))
1072                 return;
1073         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1074                 return;
1075         if(!local_zone_str2type(arg2, &t)) {
1076                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
1077                 free(nm);
1078                 return;
1079         }
1080         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1081         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1082                 nmlabs, LDNS_RR_CLASS_IN))) {
1083                 /* already present in tree */
1084                 lock_rw_wrlock(&z->lock);
1085                 z->type = t; /* update type anyway */
1086                 lock_rw_unlock(&z->lock);
1087                 free(nm);
1088                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1089                 send_ok(ssl);
1090                 return;
1091         }
1092         if(!local_zones_add_zone(worker->daemon->local_zones, nm, nmlen,
1093                 nmlabs, LDNS_RR_CLASS_IN, t)) {
1094                 lock_rw_unlock(&worker->daemon->local_zones->lock);
1095                 ssl_printf(ssl, "error out of memory\n");
1096                 return;
1097         }
1098         lock_rw_unlock(&worker->daemon->local_zones->lock);
1099         send_ok(ssl);
1100 }
1101
1102 /** Remove a zone */
1103 static void
1104 do_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1105 {
1106         uint8_t* nm;
1107         int nmlabs;
1108         size_t nmlen;
1109         struct local_zone* z;
1110         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1111                 return;
1112         lock_rw_wrlock(&worker->daemon->local_zones->lock);
1113         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1114                 nmlabs, LDNS_RR_CLASS_IN))) {
1115                 /* present in tree */
1116                 local_zones_del_zone(worker->daemon->local_zones, z);
1117         }
1118         lock_rw_unlock(&worker->daemon->local_zones->lock);
1119         free(nm);
1120         send_ok(ssl);
1121 }
1122
1123 /** Add new RR data */
1124 static void
1125 do_data_add(SSL* ssl, struct worker* worker, char* arg)
1126 {
1127         if(!local_zones_add_RR(worker->daemon->local_zones, arg)) {
1128                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1129                 return;
1130         }
1131         send_ok(ssl);
1132 }
1133
1134 /** Remove RR data */
1135 static void
1136 do_data_remove(SSL* ssl, struct worker* worker, char* arg)
1137 {
1138         uint8_t* nm;
1139         int nmlabs;
1140         size_t nmlen;
1141         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1142                 return;
1143         local_zones_del_data(worker->daemon->local_zones, nm,
1144                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1145         free(nm);
1146         send_ok(ssl);
1147 }
1148
1149 /** cache lookup of nameservers */
1150 static void
1151 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1152 {
1153         uint8_t* nm;
1154         int nmlabs;
1155         size_t nmlen;
1156         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1157                 return;
1158         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1159         free(nm);
1160 }
1161
1162 /** flush something from rrset and msg caches */
1163 static void
1164 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1165         uint16_t t, uint16_t c)
1166 {
1167         hashvalue_t h;
1168         struct query_info k;
1169         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1170         if(t == LDNS_RR_TYPE_SOA)
1171                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1172                         PACKED_RRSET_SOA_NEG);
1173         k.qname = nm;
1174         k.qname_len = nmlen;
1175         k.qtype = t;
1176         k.qclass = c;
1177         h = query_info_hash(&k, 0);
1178         slabhash_remove(worker->env.msg_cache, h, &k);
1179         if(t == LDNS_RR_TYPE_AAAA) {
1180                 /* for AAAA also flush dns64 bit_cd packet */
1181                 h = query_info_hash(&k, BIT_CD);
1182                 slabhash_remove(worker->env.msg_cache, h, &k);
1183         }
1184 }
1185
1186 /** flush a type */
1187 static void
1188 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1189 {
1190         uint8_t* nm;
1191         int nmlabs;
1192         size_t nmlen;
1193         char* arg2;
1194         uint16_t t;
1195         if(!find_arg2(ssl, arg, &arg2))
1196                 return;
1197         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1198                 return;
1199         t = sldns_get_rr_type_by_name(arg2);
1200         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1201
1202         free(nm);
1203         send_ok(ssl);
1204 }
1205
1206 /** flush statistics */
1207 static void
1208 do_flush_stats(SSL* ssl, struct worker* worker)
1209 {
1210         worker_stats_clear(worker);
1211         send_ok(ssl);
1212 }
1213
1214 /**
1215  * Local info for deletion functions
1216  */
1217 struct del_info {
1218         /** worker */
1219         struct worker* worker;
1220         /** name to delete */
1221         uint8_t* name;
1222         /** length */
1223         size_t len;
1224         /** labels */
1225         int labs;
1226         /** now */
1227         time_t now;
1228         /** time to invalidate to */
1229         time_t expired;
1230         /** number of rrsets removed */
1231         size_t num_rrsets;
1232         /** number of msgs removed */
1233         size_t num_msgs;
1234         /** number of key entries removed */
1235         size_t num_keys;
1236         /** length of addr */
1237         socklen_t addrlen;
1238         /** socket address for host deletion */
1239         struct sockaddr_storage addr;
1240 };
1241
1242 /** callback to delete hosts in infra cache */
1243 static void
1244 infra_del_host(struct lruhash_entry* e, void* arg)
1245 {
1246         /* entry is locked */
1247         struct del_info* inf = (struct del_info*)arg;
1248         struct infra_key* k = (struct infra_key*)e->key;
1249         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1250                 struct infra_data* d = (struct infra_data*)e->data;
1251                 d->probedelay = 0;
1252                 d->timeout_A = 0;
1253                 d->timeout_AAAA = 0;
1254                 d->timeout_other = 0;
1255                 rtt_init(&d->rtt);
1256                 if(d->ttl >= inf->now) {
1257                         d->ttl = inf->expired;
1258                         inf->num_keys++;
1259                 }
1260         }
1261 }
1262
1263 /** flush infra cache */
1264 static void
1265 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1266 {
1267         struct sockaddr_storage addr;
1268         socklen_t len;
1269         struct del_info inf;
1270         if(strcmp(arg, "all") == 0) {
1271                 slabhash_clear(worker->env.infra_cache->hosts);
1272                 send_ok(ssl);
1273                 return;
1274         }
1275         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1276                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1277                 return;
1278         }
1279         /* delete all entries from cache */
1280         /* what we do is to set them all expired */
1281         inf.worker = worker;
1282         inf.name = 0;
1283         inf.len = 0;
1284         inf.labs = 0;
1285         inf.now = *worker->env.now;
1286         inf.expired = *worker->env.now;
1287         inf.expired -= 3; /* handle 3 seconds skew between threads */
1288         inf.num_rrsets = 0;
1289         inf.num_msgs = 0;
1290         inf.num_keys = 0;
1291         inf.addrlen = len;
1292         memmove(&inf.addr, &addr, len);
1293         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1294                 &inf);
1295         send_ok(ssl);
1296 }
1297
1298 /** flush requestlist */
1299 static void
1300 do_flush_requestlist(SSL* ssl, struct worker* worker)
1301 {
1302         mesh_delete_all(worker->env.mesh);
1303         send_ok(ssl);
1304 }
1305
1306 /** callback to delete rrsets in a zone */
1307 static void
1308 zone_del_rrset(struct lruhash_entry* e, void* arg)
1309 {
1310         /* entry is locked */
1311         struct del_info* inf = (struct del_info*)arg;
1312         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1313         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1314                 struct packed_rrset_data* d =
1315                         (struct packed_rrset_data*)e->data;
1316                 if(d->ttl >= inf->now) {
1317                         d->ttl = inf->expired;
1318                         inf->num_rrsets++;
1319                 }
1320         }
1321 }
1322
1323 /** callback to delete messages in a zone */
1324 static void
1325 zone_del_msg(struct lruhash_entry* e, void* arg)
1326 {
1327         /* entry is locked */
1328         struct del_info* inf = (struct del_info*)arg;
1329         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1330         if(dname_subdomain_c(k->key.qname, inf->name)) {
1331                 struct reply_info* d = (struct reply_info*)e->data;
1332                 if(d->ttl >= inf->now) {
1333                         d->ttl = inf->expired;
1334                         inf->num_msgs++;
1335                 }
1336         }
1337 }
1338
1339 /** callback to delete keys in zone */
1340 static void
1341 zone_del_kcache(struct lruhash_entry* e, void* arg)
1342 {
1343         /* entry is locked */
1344         struct del_info* inf = (struct del_info*)arg;
1345         struct key_entry_key* k = (struct key_entry_key*)e->key;
1346         if(dname_subdomain_c(k->name, inf->name)) {
1347                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1348                 if(d->ttl >= inf->now) {
1349                         d->ttl = inf->expired;
1350                         inf->num_keys++;
1351                 }
1352         }
1353 }
1354
1355 /** remove all rrsets and keys from zone from cache */
1356 static void
1357 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1358 {
1359         uint8_t* nm;
1360         int nmlabs;
1361         size_t nmlen;
1362         struct del_info inf;
1363         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1364                 return;
1365         /* delete all RRs and key entries from zone */
1366         /* what we do is to set them all expired */
1367         inf.worker = worker;
1368         inf.name = nm;
1369         inf.len = nmlen;
1370         inf.labs = nmlabs;
1371         inf.now = *worker->env.now;
1372         inf.expired = *worker->env.now;
1373         inf.expired -= 3; /* handle 3 seconds skew between threads */
1374         inf.num_rrsets = 0;
1375         inf.num_msgs = 0;
1376         inf.num_keys = 0;
1377         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1378                 &zone_del_rrset, &inf);
1379
1380         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1381
1382         /* and validator cache */
1383         if(worker->env.key_cache) {
1384                 slabhash_traverse(worker->env.key_cache->slab, 1,
1385                         &zone_del_kcache, &inf);
1386         }
1387
1388         free(nm);
1389
1390         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1391                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1392                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1393 }
1394
1395 /** callback to delete bogus rrsets */
1396 static void
1397 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1398 {
1399         /* entry is locked */
1400         struct del_info* inf = (struct del_info*)arg;
1401         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1402         if(d->security == sec_status_bogus) {
1403                 d->ttl = inf->expired;
1404                 inf->num_rrsets++;
1405         }
1406 }
1407
1408 /** callback to delete bogus messages */
1409 static void
1410 bogus_del_msg(struct lruhash_entry* e, void* arg)
1411 {
1412         /* entry is locked */
1413         struct del_info* inf = (struct del_info*)arg;
1414         struct reply_info* d = (struct reply_info*)e->data;
1415         if(d->security == sec_status_bogus) {
1416                 d->ttl = inf->expired;
1417                 inf->num_msgs++;
1418         }
1419 }
1420
1421 /** callback to delete bogus keys */
1422 static void
1423 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1424 {
1425         /* entry is locked */
1426         struct del_info* inf = (struct del_info*)arg;
1427         struct key_entry_data* d = (struct key_entry_data*)e->data;
1428         if(d->isbad) {
1429                 d->ttl = inf->expired;
1430                 inf->num_keys++;
1431         }
1432 }
1433
1434 /** remove all bogus rrsets, msgs and keys from cache */
1435 static void
1436 do_flush_bogus(SSL* ssl, struct worker* worker)
1437 {
1438         struct del_info inf;
1439         /* what we do is to set them all expired */
1440         inf.worker = worker;
1441         inf.now = *worker->env.now;
1442         inf.expired = *worker->env.now;
1443         inf.expired -= 3; /* handle 3 seconds skew between threads */
1444         inf.num_rrsets = 0;
1445         inf.num_msgs = 0;
1446         inf.num_keys = 0;
1447         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1448                 &bogus_del_rrset, &inf);
1449
1450         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1451
1452         /* and validator cache */
1453         if(worker->env.key_cache) {
1454                 slabhash_traverse(worker->env.key_cache->slab, 1,
1455                         &bogus_del_kcache, &inf);
1456         }
1457
1458         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1459                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1460                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1461 }
1462
1463 /** callback to delete negative and servfail rrsets */
1464 static void
1465 negative_del_rrset(struct lruhash_entry* e, void* arg)
1466 {
1467         /* entry is locked */
1468         struct del_info* inf = (struct del_info*)arg;
1469         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1470         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1471         /* delete the parentside negative cache rrsets,
1472          * these are namerserver rrsets that failed lookup, rdata empty */
1473         if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 &&
1474                 d->rrsig_count == 0 && d->rr_len[0] == 0) {
1475                 d->ttl = inf->expired;
1476                 inf->num_rrsets++;
1477         }
1478 }
1479
1480 /** callback to delete negative and servfail messages */
1481 static void
1482 negative_del_msg(struct lruhash_entry* e, void* arg)
1483 {
1484         /* entry is locked */
1485         struct del_info* inf = (struct del_info*)arg;
1486         struct reply_info* d = (struct reply_info*)e->data;
1487         /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error
1488          * or NOERROR rcode with ANCOUNT==0: a NODATA answer */
1489         if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) {
1490                 d->ttl = inf->expired;
1491                 inf->num_msgs++;
1492         }
1493 }
1494
1495 /** callback to delete negative key entries */
1496 static void
1497 negative_del_kcache(struct lruhash_entry* e, void* arg)
1498 {
1499         /* entry is locked */
1500         struct del_info* inf = (struct del_info*)arg;
1501         struct key_entry_data* d = (struct key_entry_data*)e->data;
1502         /* could be bad because of lookup failure on the DS, DNSKEY, which
1503          * was nxdomain or servfail, and thus a result of negative lookups */
1504         if(d->isbad) {
1505                 d->ttl = inf->expired;
1506                 inf->num_keys++;
1507         }
1508 }
1509
1510 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */
1511 static void
1512 do_flush_negative(SSL* ssl, struct worker* worker)
1513 {
1514         struct del_info inf;
1515         /* what we do is to set them all expired */
1516         inf.worker = worker;
1517         inf.now = *worker->env.now;
1518         inf.expired = *worker->env.now;
1519         inf.expired -= 3; /* handle 3 seconds skew between threads */
1520         inf.num_rrsets = 0;
1521         inf.num_msgs = 0;
1522         inf.num_keys = 0;
1523         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1524                 &negative_del_rrset, &inf);
1525
1526         slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf);
1527
1528         /* and validator cache */
1529         if(worker->env.key_cache) {
1530                 slabhash_traverse(worker->env.key_cache->slab, 1,
1531                         &negative_del_kcache, &inf);
1532         }
1533
1534         (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages "
1535                 "and %lu key entries\n", (unsigned long)inf.num_rrsets,
1536                 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys);
1537 }
1538
1539 /** remove name rrset from cache */
1540 static void
1541 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1542 {
1543         uint8_t* nm;
1544         int nmlabs;
1545         size_t nmlen;
1546         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1547                 return;
1548         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1549         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1550         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1551         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1552         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1553         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1554         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1555         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1556         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1557         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1558
1559         free(nm);
1560         send_ok(ssl);
1561 }
1562
1563 /** printout a delegation point info */
1564 static int
1565 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1566         struct delegpt* dp)
1567 {
1568         char buf[257];
1569         struct delegpt_ns* ns;
1570         struct delegpt_addr* a;
1571         int f = 0;
1572         if(str) { /* print header for forward, stub */
1573                 char* c = sldns_wire2str_class(dclass);
1574                 dname_str(nm, buf);
1575                 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) {
1576                         free(c);
1577                         return 0;
1578                 }
1579                 free(c);
1580         }
1581         for(ns = dp->nslist; ns; ns = ns->next) {
1582                 dname_str(ns->name, buf);
1583                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1584                         return 0;
1585                 f = 1;
1586         }
1587         for(a = dp->target_list; a; a = a->next_target) {
1588                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1589                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1590                         return 0;
1591                 f = 1;
1592         }
1593         return ssl_printf(ssl, "\n");
1594 }
1595
1596
1597 /** print root forwards */
1598 static int
1599 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1600 {
1601         struct delegpt* dp;
1602         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1603         if(!dp)
1604                 return ssl_printf(ssl, "off (using root hints)\n");
1605         /* if dp is returned it must be the root */
1606         log_assert(query_dname_compare(dp->name, root)==0);
1607         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1608 }
1609
1610 /** parse args into delegpt */
1611 static struct delegpt*
1612 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1613 {
1614         /* parse args and add in */
1615         char* p = args;
1616         char* todo;
1617         struct delegpt* dp = delegpt_create_mlc(nm);
1618         struct sockaddr_storage addr;
1619         socklen_t addrlen;
1620         if(!dp) {
1621                 (void)ssl_printf(ssl, "error out of memory\n");
1622                 return NULL;
1623         }
1624         while(p) {
1625                 todo = p;
1626                 p = strchr(p, ' '); /* find next spot, if any */
1627                 if(p) {
1628                         *p++ = 0;       /* end this spot */
1629                         p = skipwhite(p); /* position at next spot */
1630                 }
1631                 /* parse address */
1632                 if(!extstrtoaddr(todo, &addr, &addrlen)) {
1633                         if(allow_names) {
1634                                 uint8_t* n = NULL;
1635                                 size_t ln;
1636                                 int lb;
1637                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1638                                         (void)ssl_printf(ssl, "error cannot "
1639                                                 "parse IP address or name "
1640                                                 "'%s'\n", todo);
1641                                         delegpt_free_mlc(dp);
1642                                         return NULL;
1643                                 }
1644                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1645                                         (void)ssl_printf(ssl, "error out of memory\n");
1646                                         free(n);
1647                                         delegpt_free_mlc(dp);
1648                                         return NULL;
1649                                 }
1650                                 free(n);
1651
1652                         } else {
1653                                 (void)ssl_printf(ssl, "error cannot parse"
1654                                         " IP address '%s'\n", todo);
1655                                 delegpt_free_mlc(dp);
1656                                 return NULL;
1657                         }
1658                 } else {
1659                         /* add address */
1660                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
1661                                 (void)ssl_printf(ssl, "error out of memory\n");
1662                                 delegpt_free_mlc(dp);
1663                                 return NULL;
1664                         }
1665                 }
1666         }
1667         return dp;
1668 }
1669
1670 /** do the status command */
1671 static void
1672 do_forward(SSL* ssl, struct worker* worker, char* args)
1673 {
1674         struct iter_forwards* fwd = worker->env.fwds;
1675         uint8_t* root = (uint8_t*)"\000";
1676         if(!fwd) {
1677                 (void)ssl_printf(ssl, "error: structure not allocated\n");
1678                 return;
1679         }
1680         if(args == NULL || args[0] == 0) {
1681                 (void)print_root_fwds(ssl, fwd, root);
1682                 return;
1683         }
1684         /* set root forwards for this thread. since we are in remote control
1685          * the actual mesh is not running, so we can freely edit it. */
1686         /* delete all the existing queries first */
1687         mesh_delete_all(worker->env.mesh);
1688         if(strcmp(args, "off") == 0) {
1689                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
1690         } else {
1691                 struct delegpt* dp;
1692                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
1693                         return;
1694                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1695                         (void)ssl_printf(ssl, "error out of memory\n");
1696                         return;
1697                 }
1698         }
1699         send_ok(ssl);
1700 }
1701
1702 static int
1703 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
1704         int* insecure, int* prime)
1705 {
1706         char* zonename;
1707         char* rest;
1708         size_t nmlen;
1709         int nmlabs;
1710         /* parse all -x args */
1711         while(args[0] == '+') {
1712                 if(!find_arg2(ssl, args, &rest))
1713                         return 0;
1714                 while(*(++args) != 0) {
1715                         if(*args == 'i' && insecure)
1716                                 *insecure = 1;
1717                         else if(*args == 'p' && prime)
1718                                 *prime = 1;
1719                         else {
1720                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
1721                                 return 0;
1722                         }
1723                 }
1724                 args = rest;
1725         }
1726         /* parse name */
1727         if(dp) {
1728                 if(!find_arg2(ssl, args, &rest))
1729                         return 0;
1730                 zonename = args;
1731                 args = rest;
1732         } else  zonename = args;
1733         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
1734                 return 0;
1735
1736         /* parse dp */
1737         if(dp) {
1738                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
1739                         free(*nm);
1740                         return 0;
1741                 }
1742         }
1743         return 1;
1744 }
1745
1746 /** do the forward_add command */
1747 static void
1748 do_forward_add(SSL* ssl, struct worker* worker, char* args)
1749 {
1750         struct iter_forwards* fwd = worker->env.fwds;
1751         int insecure = 0;
1752         uint8_t* nm = NULL;
1753         struct delegpt* dp = NULL;
1754         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
1755                 return;
1756         if(insecure && worker->env.anchors) {
1757                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1758                         nm)) {
1759                         (void)ssl_printf(ssl, "error out of memory\n");
1760                         delegpt_free_mlc(dp);
1761                         free(nm);
1762                         return;
1763                 }
1764         }
1765         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1766                 (void)ssl_printf(ssl, "error out of memory\n");
1767                 free(nm);
1768                 return;
1769         }
1770         free(nm);
1771         send_ok(ssl);
1772 }
1773
1774 /** do the forward_remove command */
1775 static void
1776 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
1777 {
1778         struct iter_forwards* fwd = worker->env.fwds;
1779         int insecure = 0;
1780         uint8_t* nm = NULL;
1781         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1782                 return;
1783         if(insecure && worker->env.anchors)
1784                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1785                         nm);
1786         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
1787         free(nm);
1788         send_ok(ssl);
1789 }
1790
1791 /** do the stub_add command */
1792 static void
1793 do_stub_add(SSL* ssl, struct worker* worker, char* args)
1794 {
1795         struct iter_forwards* fwd = worker->env.fwds;
1796         int insecure = 0, prime = 0;
1797         uint8_t* nm = NULL;
1798         struct delegpt* dp = NULL;
1799         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
1800                 return;
1801         if(insecure && worker->env.anchors) {
1802                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1803                         nm)) {
1804                         (void)ssl_printf(ssl, "error out of memory\n");
1805                         delegpt_free_mlc(dp);
1806                         free(nm);
1807                         return;
1808                 }
1809         }
1810         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
1811                 if(insecure && worker->env.anchors)
1812                         anchors_delete_insecure(worker->env.anchors,
1813                                 LDNS_RR_CLASS_IN, nm);
1814                 (void)ssl_printf(ssl, "error out of memory\n");
1815                 delegpt_free_mlc(dp);
1816                 free(nm);
1817                 return;
1818         }
1819         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
1820                 (void)ssl_printf(ssl, "error out of memory\n");
1821                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1822                 if(insecure && worker->env.anchors)
1823                         anchors_delete_insecure(worker->env.anchors,
1824                                 LDNS_RR_CLASS_IN, nm);
1825                 free(nm);
1826                 return;
1827         }
1828         free(nm);
1829         send_ok(ssl);
1830 }
1831
1832 /** do the stub_remove command */
1833 static void
1834 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
1835 {
1836         struct iter_forwards* fwd = worker->env.fwds;
1837         int insecure = 0;
1838         uint8_t* nm = NULL;
1839         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1840                 return;
1841         if(insecure && worker->env.anchors)
1842                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1843                         nm);
1844         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1845         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
1846         free(nm);
1847         send_ok(ssl);
1848 }
1849
1850 /** do the insecure_add command */
1851 static void
1852 do_insecure_add(SSL* ssl, struct worker* worker, char* arg)
1853 {
1854         size_t nmlen;
1855         int nmlabs;
1856         uint8_t* nm = NULL;
1857         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1858                 return;
1859         if(worker->env.anchors) {
1860                 if(!anchors_add_insecure(worker->env.anchors,
1861                         LDNS_RR_CLASS_IN, nm)) {
1862                         (void)ssl_printf(ssl, "error out of memory\n");
1863                         free(nm);
1864                         return;
1865                 }
1866         }
1867         free(nm);
1868         send_ok(ssl);
1869 }
1870
1871 /** do the insecure_remove command */
1872 static void
1873 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg)
1874 {
1875         size_t nmlen;
1876         int nmlabs;
1877         uint8_t* nm = NULL;
1878         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1879                 return;
1880         if(worker->env.anchors)
1881                 anchors_delete_insecure(worker->env.anchors,
1882                         LDNS_RR_CLASS_IN, nm);
1883         free(nm);
1884         send_ok(ssl);
1885 }
1886
1887 /** do the status command */
1888 static void
1889 do_status(SSL* ssl, struct worker* worker)
1890 {
1891         int i;
1892         time_t uptime;
1893         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
1894                 return;
1895         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
1896                 return;
1897         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
1898                 return;
1899         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
1900                 return;
1901         for(i=0; i<worker->daemon->mods.num; i++) {
1902                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
1903                         return;
1904         }
1905         if(!ssl_printf(ssl, " ]\n"))
1906                 return;
1907         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
1908         if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime))
1909                 return;
1910         if(!ssl_printf(ssl, "options:%s%s\n" ,
1911                 (worker->daemon->reuseport?" reuseport":""),
1912                 (worker->daemon->rc->accept_list?" control(ssl)":"")))
1913                 return;
1914         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
1915                 (int)getpid()))
1916                 return;
1917 }
1918
1919 /** get age for the mesh state */
1920 static void
1921 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
1922         struct module_env* env)
1923 {
1924         if(m->reply_list) {
1925                 struct timeval d;
1926                 struct mesh_reply* r = m->reply_list;
1927                 /* last reply is the oldest */
1928                 while(r && r->next)
1929                         r = r->next;
1930                 timeval_subtract(&d, env->now_tv, &r->start_time);
1931                 snprintf(buf, len, ARG_LL "d.%6.6d",
1932                         (long long)d.tv_sec, (int)d.tv_usec);
1933         } else {
1934                 snprintf(buf, len, "-");
1935         }
1936 }
1937
1938 /** get status of a mesh state */
1939 static void
1940 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
1941         char* buf, size_t len)
1942 {
1943         enum module_ext_state s = m->s.ext_state[m->s.curmod];
1944         const char *modname = mesh->mods.mod[m->s.curmod]->name;
1945         size_t l;
1946         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
1947                 m->s.minfo[m->s.curmod]) {
1948                 /* break into iterator to find out who its waiting for */
1949                 struct iter_qstate* qstate = (struct iter_qstate*)
1950                         m->s.minfo[m->s.curmod];
1951                 struct outbound_list* ol = &qstate->outlist;
1952                 struct outbound_entry* e;
1953                 snprintf(buf, len, "%s wait for", modname);
1954                 l = strlen(buf);
1955                 buf += l; len -= l;
1956                 if(ol->first == NULL)
1957                         snprintf(buf, len, " (empty_list)");
1958                 for(e = ol->first; e; e = e->next) {
1959                         snprintf(buf, len, " ");
1960                         l = strlen(buf);
1961                         buf += l; len -= l;
1962                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
1963                                 buf, len);
1964                         l = strlen(buf);
1965                         buf += l; len -= l;
1966                 }
1967         } else if(s == module_wait_subquery) {
1968                 /* look in subs from mesh state to see what */
1969                 char nm[257];
1970                 struct mesh_state_ref* sub;
1971                 snprintf(buf, len, "%s wants", modname);
1972                 l = strlen(buf);
1973                 buf += l; len -= l;
1974                 if(m->sub_set.count == 0)
1975                         snprintf(buf, len, " (empty_list)");
1976                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
1977                         char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype);
1978                         char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass);
1979                         dname_str(sub->s->s.qinfo.qname, nm);
1980                         snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"),
1981                                 (c?c:"CLASS??"), nm);
1982                         l = strlen(buf);
1983                         buf += l; len -= l;
1984                         free(t);
1985                         free(c);
1986                 }
1987         } else {
1988                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
1989         }
1990 }
1991
1992 /** do the dump_requestlist command */
1993 static void
1994 do_dump_requestlist(SSL* ssl, struct worker* worker)
1995 {
1996         struct mesh_area* mesh;
1997         struct mesh_state* m;
1998         int num = 0;
1999         char buf[257];
2000         char timebuf[32];
2001         char statbuf[10240];
2002         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
2003                 return;
2004         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
2005                 return;
2006         /* show worker mesh contents */
2007         mesh = worker->env.mesh;
2008         if(!mesh) return;
2009         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
2010                 char* t = sldns_wire2str_type(m->s.qinfo.qtype);
2011                 char* c = sldns_wire2str_class(m->s.qinfo.qclass);
2012                 dname_str(m->s.qinfo.qname, buf);
2013                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
2014                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
2015                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
2016                         num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf,
2017                         statbuf)) {
2018                         free(t);
2019                         free(c);
2020                         return;
2021                 }
2022                 num++;
2023                 free(t);
2024                 free(c);
2025         }
2026 }
2027
2028 /** structure for argument data for dump infra host */
2029 struct infra_arg {
2030         /** the infra cache */
2031         struct infra_cache* infra;
2032         /** the SSL connection */
2033         SSL* ssl;
2034         /** the time now */
2035         time_t now;
2036         /** ssl failure? stop writing and skip the rest.  If the tcp
2037          * connection is broken, and writes fail, we then stop writing. */
2038         int ssl_failed;
2039 };
2040
2041 /** callback for every host element in the infra cache */
2042 static void
2043 dump_infra_host(struct lruhash_entry* e, void* arg)
2044 {
2045         struct infra_arg* a = (struct infra_arg*)arg;
2046         struct infra_key* k = (struct infra_key*)e->key;
2047         struct infra_data* d = (struct infra_data*)e->data;
2048         char ip_str[1024];
2049         char name[257];
2050         if(a->ssl_failed)
2051                 return;
2052         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
2053         dname_str(k->zonename, name);
2054         /* skip expired stuff (only backed off) */
2055         if(d->ttl < a->now) {
2056                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
2057                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
2058                                 name, d->rtt.rto))  {
2059                                 a->ssl_failed = 1;
2060                                 return;
2061                         }
2062                 }
2063                 return;
2064         }
2065         if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d "
2066                 "tA %d tAAAA %d tother %d "
2067                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
2068                 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now),
2069                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
2070                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
2071                 (int)d->edns_lame_known, (int)d->edns_version,
2072                 (int)(a->now<d->probedelay?d->probedelay-a->now:0),
2073                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
2074                 (int)d->lame_other)) {
2075                 a->ssl_failed = 1;
2076                 return;
2077         }
2078 }
2079
2080 /** do the dump_infra command */
2081 static void
2082 do_dump_infra(SSL* ssl, struct worker* worker)
2083 {
2084         struct infra_arg arg;
2085         arg.infra = worker->env.infra_cache;
2086         arg.ssl = ssl;
2087         arg.now = *worker->env.now;
2088         arg.ssl_failed = 0;
2089         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
2090 }
2091
2092 /** do the log_reopen command */
2093 static void
2094 do_log_reopen(SSL* ssl, struct worker* worker)
2095 {
2096         struct config_file* cfg = worker->env.cfg;
2097         send_ok(ssl);
2098         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
2099 }
2100
2101 /** do the set_option command */
2102 static void
2103 do_set_option(SSL* ssl, struct worker* worker, char* arg)
2104 {
2105         char* arg2;
2106         if(!find_arg2(ssl, arg, &arg2))
2107                 return;
2108         if(!config_set_option(worker->env.cfg, arg, arg2)) {
2109                 (void)ssl_printf(ssl, "error setting option\n");
2110                 return;
2111         }
2112         send_ok(ssl);
2113 }
2114
2115 /* routine to printout option values over SSL */
2116 void remote_get_opt_ssl(char* line, void* arg)
2117 {
2118         SSL* ssl = (SSL*)arg;
2119         (void)ssl_printf(ssl, "%s\n", line);
2120 }
2121
2122 /** do the get_option command */
2123 static void
2124 do_get_option(SSL* ssl, struct worker* worker, char* arg)
2125 {
2126         int r;
2127         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
2128         if(!r) {
2129                 (void)ssl_printf(ssl, "error unknown option\n");
2130                 return;
2131         }
2132 }
2133
2134 /** do the list_forwards command */
2135 static void
2136 do_list_forwards(SSL* ssl, struct worker* worker)
2137 {
2138         /* since its a per-worker structure no locks needed */
2139         struct iter_forwards* fwds = worker->env.fwds;
2140         struct iter_forward_zone* z;
2141         struct trust_anchor* a;
2142         int insecure;
2143         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
2144                 if(!z->dp) continue; /* skip empty marker for stub */
2145
2146                 /* see if it is insecure */
2147                 insecure = 0;
2148                 if(worker->env.anchors &&
2149                         (a=anchor_find(worker->env.anchors, z->name,
2150                         z->namelabs, z->namelen,  z->dclass))) {
2151                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2152                                 insecure = 1;
2153                         lock_basic_unlock(&a->lock);
2154                 }
2155
2156                 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
2157                         z->name, z->dclass, z->dp))
2158                         return;
2159         }
2160 }
2161
2162 /** do the list_stubs command */
2163 static void
2164 do_list_stubs(SSL* ssl, struct worker* worker)
2165 {
2166         struct iter_hints_stub* z;
2167         struct trust_anchor* a;
2168         int insecure;
2169         char str[32];
2170         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
2171
2172                 /* see if it is insecure */
2173                 insecure = 0;
2174                 if(worker->env.anchors &&
2175                         (a=anchor_find(worker->env.anchors, z->node.name,
2176                         z->node.labs, z->node.len,  z->node.dclass))) {
2177                         if(!a->keylist && !a->numDS && !a->numDNSKEY)
2178                                 insecure = 1;
2179                         lock_basic_unlock(&a->lock);
2180                 }
2181
2182                 snprintf(str, sizeof(str), "stub %sprime%s",
2183                         (z->noprime?"no":""), (insecure?" +i":""));
2184                 if(!ssl_print_name_dp(ssl, str, z->node.name,
2185                         z->node.dclass, z->dp))
2186                         return;
2187         }
2188 }
2189
2190 /** do the list_local_zones command */
2191 static void
2192 do_list_local_zones(SSL* ssl, struct worker* worker)
2193 {
2194         struct local_zones* zones = worker->daemon->local_zones;
2195         struct local_zone* z;
2196         char buf[257];
2197         lock_rw_rdlock(&zones->lock);
2198         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2199                 lock_rw_rdlock(&z->lock);
2200                 dname_str(z->name, buf);
2201                 if(!ssl_printf(ssl, "%s %s\n", buf,
2202                         local_zone_type2str(z->type))) {
2203                         /* failure to print */
2204                         lock_rw_unlock(&z->lock);
2205                         lock_rw_unlock(&zones->lock);
2206                         return;
2207                 }
2208                 lock_rw_unlock(&z->lock);
2209         }
2210         lock_rw_unlock(&zones->lock);
2211 }
2212
2213 /** do the list_local_data command */
2214 static void
2215 do_list_local_data(SSL* ssl, struct worker* worker)
2216 {
2217         struct local_zones* zones = worker->daemon->local_zones;
2218         struct local_zone* z;
2219         struct local_data* d;
2220         struct local_rrset* p;
2221         char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer);
2222         size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer);
2223         lock_rw_rdlock(&zones->lock);
2224         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
2225                 lock_rw_rdlock(&z->lock);
2226                 RBTREE_FOR(d, struct local_data*, &z->data) {
2227                         for(p = d->rrsets; p; p = p->next) {
2228                                 struct packed_rrset_data* d =
2229                                         (struct packed_rrset_data*)p->rrset->entry.data;
2230                                 size_t i;
2231                                 for(i=0; i<d->count + d->rrsig_count; i++) {
2232                                         if(!packed_rr_to_string(p->rrset, i,
2233                                                 0, s, slen)) {
2234                                                 if(!ssl_printf(ssl, "BADRR\n"))
2235                                                         return;
2236                                         }
2237                                         if(!ssl_printf(ssl, "%s\n", s))
2238                                                 return;
2239                                 }
2240                         }
2241                 }
2242                 lock_rw_unlock(&z->lock);
2243         }
2244         lock_rw_unlock(&zones->lock);
2245 }
2246
2247 /** tell other processes to execute the command */
2248 static void
2249 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
2250 {
2251         int i;
2252         if(!cmd || !ssl)
2253                 return;
2254         /* skip i=0 which is me */
2255         for(i=1; i<rc->worker->daemon->num; i++) {
2256                 worker_send_cmd(rc->worker->daemon->workers[i],
2257                         worker_cmd_remote);
2258                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
2259                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
2260                         ssl_printf(ssl, "error could not distribute cmd\n");
2261                         return;
2262                 }
2263         }
2264 }
2265
2266 /** check for name with end-of-string, space or tab after it */
2267 static int
2268 cmdcmp(char* p, const char* cmd, size_t len)
2269 {
2270         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
2271 }
2272
2273 /** execute a remote control command */
2274 static void
2275 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
2276         struct worker* worker)
2277 {
2278         char* p = skipwhite(cmd);
2279         /* compare command */
2280         if(cmdcmp(p, "stop", 4)) {
2281                 do_stop(ssl, rc);
2282                 return;
2283         } else if(cmdcmp(p, "reload", 6)) {
2284                 do_reload(ssl, rc);
2285                 return;
2286         } else if(cmdcmp(p, "stats_noreset", 13)) {
2287                 do_stats(ssl, rc, 0);
2288                 return;
2289         } else if(cmdcmp(p, "stats", 5)) {
2290                 do_stats(ssl, rc, 1);
2291                 return;
2292         } else if(cmdcmp(p, "status", 6)) {
2293                 do_status(ssl, worker);
2294                 return;
2295         } else if(cmdcmp(p, "dump_cache", 10)) {
2296                 (void)dump_cache(ssl, worker);
2297                 return;
2298         } else if(cmdcmp(p, "load_cache", 10)) {
2299                 if(load_cache(ssl, worker)) send_ok(ssl);
2300                 return;
2301         } else if(cmdcmp(p, "list_forwards", 13)) {
2302                 do_list_forwards(ssl, worker);
2303                 return;
2304         } else if(cmdcmp(p, "list_stubs", 10)) {
2305                 do_list_stubs(ssl, worker);
2306                 return;
2307         } else if(cmdcmp(p, "list_local_zones", 16)) {
2308                 do_list_local_zones(ssl, worker);
2309                 return;
2310         } else if(cmdcmp(p, "list_local_data", 15)) {
2311                 do_list_local_data(ssl, worker);
2312                 return;
2313         } else if(cmdcmp(p, "stub_add", 8)) {
2314                 /* must always distribute this cmd */
2315                 if(rc) distribute_cmd(rc, ssl, cmd);
2316                 do_stub_add(ssl, worker, skipwhite(p+8));
2317                 return;
2318         } else if(cmdcmp(p, "stub_remove", 11)) {
2319                 /* must always distribute this cmd */
2320                 if(rc) distribute_cmd(rc, ssl, cmd);
2321                 do_stub_remove(ssl, worker, skipwhite(p+11));
2322                 return;
2323         } else if(cmdcmp(p, "forward_add", 11)) {
2324                 /* must always distribute this cmd */
2325                 if(rc) distribute_cmd(rc, ssl, cmd);
2326                 do_forward_add(ssl, worker, skipwhite(p+11));
2327                 return;
2328         } else if(cmdcmp(p, "forward_remove", 14)) {
2329                 /* must always distribute this cmd */
2330                 if(rc) distribute_cmd(rc, ssl, cmd);
2331                 do_forward_remove(ssl, worker, skipwhite(p+14));
2332                 return;
2333         } else if(cmdcmp(p, "insecure_add", 12)) {
2334                 /* must always distribute this cmd */
2335                 if(rc) distribute_cmd(rc, ssl, cmd);
2336                 do_insecure_add(ssl, worker, skipwhite(p+12));
2337                 return;
2338         } else if(cmdcmp(p, "insecure_remove", 15)) {
2339                 /* must always distribute this cmd */
2340                 if(rc) distribute_cmd(rc, ssl, cmd);
2341                 do_insecure_remove(ssl, worker, skipwhite(p+15));
2342                 return;
2343         } else if(cmdcmp(p, "forward", 7)) {
2344                 /* must always distribute this cmd */
2345                 if(rc) distribute_cmd(rc, ssl, cmd);
2346                 do_forward(ssl, worker, skipwhite(p+7));
2347                 return;
2348         } else if(cmdcmp(p, "flush_stats", 11)) {
2349                 /* must always distribute this cmd */
2350                 if(rc) distribute_cmd(rc, ssl, cmd);
2351                 do_flush_stats(ssl, worker);
2352                 return;
2353         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2354                 /* must always distribute this cmd */
2355                 if(rc) distribute_cmd(rc, ssl, cmd);
2356                 do_flush_requestlist(ssl, worker);
2357                 return;
2358         } else if(cmdcmp(p, "lookup", 6)) {
2359                 do_lookup(ssl, worker, skipwhite(p+6));
2360                 return;
2361         }
2362
2363 #ifdef THREADS_DISABLED
2364         /* other processes must execute the command as well */
2365         /* commands that should not be distributed, returned above. */
2366         if(rc) { /* only if this thread is the master (rc) thread */
2367                 /* done before the code below, which may split the string */
2368                 distribute_cmd(rc, ssl, cmd);
2369         }
2370 #endif
2371         if(cmdcmp(p, "verbosity", 9)) {
2372                 do_verbosity(ssl, skipwhite(p+9));
2373         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2374                 do_zone_remove(ssl, worker, skipwhite(p+17));
2375         } else if(cmdcmp(p, "local_zone", 10)) {
2376                 do_zone_add(ssl, worker, skipwhite(p+10));
2377         } else if(cmdcmp(p, "local_data_remove", 17)) {
2378                 do_data_remove(ssl, worker, skipwhite(p+17));
2379         } else if(cmdcmp(p, "local_data", 10)) {
2380                 do_data_add(ssl, worker, skipwhite(p+10));
2381         } else if(cmdcmp(p, "flush_zone", 10)) {
2382                 do_flush_zone(ssl, worker, skipwhite(p+10));
2383         } else if(cmdcmp(p, "flush_type", 10)) {
2384                 do_flush_type(ssl, worker, skipwhite(p+10));
2385         } else if(cmdcmp(p, "flush_infra", 11)) {
2386                 do_flush_infra(ssl, worker, skipwhite(p+11));
2387         } else if(cmdcmp(p, "flush", 5)) {
2388                 do_flush_name(ssl, worker, skipwhite(p+5));
2389         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2390                 do_dump_requestlist(ssl, worker);
2391         } else if(cmdcmp(p, "dump_infra", 10)) {
2392                 do_dump_infra(ssl, worker);
2393         } else if(cmdcmp(p, "log_reopen", 10)) {
2394                 do_log_reopen(ssl, worker);
2395         } else if(cmdcmp(p, "set_option", 10)) {
2396                 do_set_option(ssl, worker, skipwhite(p+10));
2397         } else if(cmdcmp(p, "get_option", 10)) {
2398                 do_get_option(ssl, worker, skipwhite(p+10));
2399         } else if(cmdcmp(p, "flush_bogus", 11)) {
2400                 do_flush_bogus(ssl, worker);
2401         } else if(cmdcmp(p, "flush_negative", 14)) {
2402                 do_flush_negative(ssl, worker);
2403         } else {
2404                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2405         }
2406 }
2407
2408 void
2409 daemon_remote_exec(struct worker* worker)
2410 {
2411         /* read the cmd string */
2412         uint8_t* msg = NULL;
2413         uint32_t len = 0;
2414         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2415                 log_err("daemon_remote_exec: tube_read_msg failed");
2416                 return;
2417         }
2418         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2419         execute_cmd(NULL, NULL, (char*)msg, worker);
2420         free(msg);
2421 }
2422
2423 /** handle remote control request */
2424 static void
2425 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2426 {
2427         int r;
2428         char pre[10];
2429         char magic[7];
2430         char buf[1024];
2431 #ifdef USE_WINSOCK
2432         /* makes it possible to set the socket blocking again. */
2433         /* basically removes it from winsock_event ... */
2434         WSAEventSelect(s->c->fd, NULL, 0);
2435 #endif
2436         fd_set_block(s->c->fd);
2437
2438         /* try to read magic UBCT[version]_space_ string */
2439         ERR_clear_error();
2440         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2441                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2442                         return;
2443                 log_crypto_err("could not SSL_read");
2444                 return;
2445         }
2446         magic[6] = 0;
2447         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2448                 verbose(VERB_QUERY, "control connection has bad magic string");
2449                 /* probably wrong tool connected, ignore it completely */
2450                 return;
2451         }
2452
2453         /* read the command line */
2454         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2455                 return;
2456         }
2457         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
2458         if(strcmp(magic, pre) != 0) {
2459                 verbose(VERB_QUERY, "control connection had bad "
2460                         "version %s, cmd: %s", magic, buf);
2461                 ssl_printf(ssl, "error version mismatch\n");
2462                 return;
2463         }
2464         verbose(VERB_DETAIL, "control cmd: %s", buf);
2465
2466         /* figure out what to do */
2467         execute_cmd(rc, ssl, buf, rc->worker);
2468 }
2469
2470 int remote_control_callback(struct comm_point* c, void* arg, int err,
2471         struct comm_reply* ATTR_UNUSED(rep))
2472 {
2473         struct rc_state* s = (struct rc_state*)arg;
2474         struct daemon_remote* rc = s->rc;
2475         int r;
2476         if(err != NETEVENT_NOERROR) {
2477                 if(err==NETEVENT_TIMEOUT)
2478                         log_err("remote control timed out");
2479                 clean_point(rc, s);
2480                 return 0;
2481         }
2482         /* (continue to) setup the SSL connection */
2483         ERR_clear_error();
2484         r = SSL_do_handshake(s->ssl);
2485         if(r != 1) {
2486                 int r2 = SSL_get_error(s->ssl, r);
2487                 if(r2 == SSL_ERROR_WANT_READ) {
2488                         if(s->shake_state == rc_hs_read) {
2489                                 /* try again later */
2490                                 return 0;
2491                         }
2492                         s->shake_state = rc_hs_read;
2493                         comm_point_listen_for_rw(c, 1, 0);
2494                         return 0;
2495                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
2496                         if(s->shake_state == rc_hs_write) {
2497                                 /* try again later */
2498                                 return 0;
2499                         }
2500                         s->shake_state = rc_hs_write;
2501                         comm_point_listen_for_rw(c, 0, 1);
2502                         return 0;
2503                 } else {
2504                         if(r == 0)
2505                                 log_err("remote control connection closed prematurely");
2506                         log_addr(1, "failed connection from",
2507                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
2508                         log_crypto_err("remote control failed ssl");
2509                         clean_point(rc, s);
2510                         return 0;
2511                 }
2512         }
2513         s->shake_state = rc_none;
2514
2515         /* once handshake has completed, check authentication */
2516         if (!rc->use_cert) {
2517                 verbose(VERB_ALGO, "unauthenticated remote control connection");
2518         } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
2519                 X509* x = SSL_get_peer_certificate(s->ssl);
2520                 if(!x) {
2521                         verbose(VERB_DETAIL, "remote control connection "
2522                                 "provided no client certificate");
2523                         clean_point(rc, s);
2524                         return 0;
2525                 }
2526                 verbose(VERB_ALGO, "remote control connection authenticated");
2527                 X509_free(x);
2528         } else {
2529                 verbose(VERB_DETAIL, "remote control connection failed to "
2530                         "authenticate with client certificate");
2531                 clean_point(rc, s);
2532                 return 0;
2533         }
2534
2535         /* if OK start to actually handle the request */
2536         handle_req(rc, s, s->ssl);
2537
2538         verbose(VERB_ALGO, "remote control operation completed");
2539         clean_point(rc, s);
2540         return 0;
2541 }