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 LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * 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 SSLv3/TLS capable web browser.
  42  * The channel is secured using SSLv3 or 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 #include <ctype.h>
  50 #include <ldns/ldns.h>
  51 #include "daemon/remote.h"
  52 #include "daemon/worker.h"
  53 #include "daemon/daemon.h"
  54 #include "daemon/stats.h"
  55 #include "daemon/cachedump.h"
  56 #include "util/log.h"
  57 #include "util/config_file.h"
  58 #include "util/net_help.h"
  59 #include "util/module.h"
  60 #include "services/listen_dnsport.h"
  61 #include "services/cache/rrset.h"
  62 #include "services/cache/infra.h"
  63 #include "services/mesh.h"
  64 #include "services/localzone.h"
  65 #include "util/storage/slabhash.h"
  66 #include "util/fptr_wlist.h"
  67 #include "util/data/dname.h"
  68 #include "validator/validator.h"
  69 #include "validator/val_kcache.h"
  70 #include "validator/val_kentry.h"
  71 #include "validator/val_anchor.h"
  72 #include "iterator/iterator.h"
  73 #include "iterator/iter_fwd.h"
  74 #include "iterator/iter_hints.h"
  75 #include "iterator/iter_delegpt.h"
  76 #include "services/outbound_list.h"
  77 #include "services/outside_network.h"
  78
  79 #ifdef HAVE_SYS_TYPES_H
  80 #  include <sys/types.h>
  81 #endif
  82 #ifdef HAVE_NETDB_H
  83 #include <netdb.h>
  84 #endif
  85
  86 /* just for portability */
  87 #ifdef SQ
  88 #undef SQ
  89 #endif
  90
  91 /** what to put on statistics lines between var and value, ": " or "=" */
  92 #define SQ "="
  93 /** if true, inhibits a lot of =0 lines from the stats output */
  94 static const int inhibit_zero = 1;
  95
  96 /** subtract timers and the values do not overflow or become negative */
  97 static void
  98 timeval_subtract(struct timeval* d, const struct timeval* end,
  99         const struct timeval* start)
 100 {
 101 #ifndef S_SPLINT_S
 102         time_t end_usec = end->tv_usec;
 103         d->tv_sec = end->tv_sec - start->tv_sec;
 104         if(end_usec < start->tv_usec) {
 105                 end_usec += 1000000;
 106                 d->tv_sec--;
 107         }
 108         d->tv_usec = end_usec - start->tv_usec;
 109 #endif
 110 }
 111
 112 /** divide sum of timers to get average */
 113 static void
 114 timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
 115 {
 116 #ifndef S_SPLINT_S
 117         size_t leftover;
 118         if(d == 0) {
 119                 avg->tv_sec = 0;
 120                 avg->tv_usec = 0;
 121                 return;
 122         }
 123         avg->tv_sec = sum->tv_sec / d;
 124         avg->tv_usec = sum->tv_usec / d;
 125         /* handle fraction from seconds divide */
 126         leftover = sum->tv_sec - avg->tv_sec*d;
 127         avg->tv_usec += (leftover*1000000)/d;
 128 #endif
 129 }
 130
 131 struct daemon_remote*
 132 daemon_remote_create(struct config_file* cfg)
 133 {
 134         char* s_cert;
 135         char* s_key;
 136         struct daemon_remote* rc = (struct daemon_remote*)calloc(1,
 137                 sizeof(*rc));
 138         if(!rc) {
 139                 log_err("out of memory in daemon_remote_create");
 140                 return NULL;
 141         }
 142         rc->max_active = 10;
 143
 144         if(!cfg->remote_control_enable) {
 145                 rc->ctx = NULL;
 146                 return rc;
 147         }
 148         rc->ctx = SSL_CTX_new(SSLv23_server_method());
 149         if(!rc->ctx) {
 150                 log_crypto_err("could not SSL_CTX_new");
 151                 free(rc);
 152                 return NULL;
 153         }
 154         /* no SSLv2 because has defects */
 155         if(!(SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)){
 156                 log_crypto_err("could not set SSL_OP_NO_SSLv2");
 157                 daemon_remote_delete(rc);
 158                 return NULL;
 159         }
 160         s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
 161         s_key = fname_after_chroot(cfg->server_key_file, cfg, 1);
 162         if(!s_cert || !s_key) {
 163                 log_err("out of memory in remote control fname");
 164                 goto setup_error;
 165         }
 166         verbose(VERB_ALGO, "setup SSL certificates");
 167         if (!SSL_CTX_use_certificate_file(rc->ctx,s_cert,SSL_FILETYPE_PEM)) {
 168                 log_err("Error for server-cert-file: %s", s_cert);
 169                 log_crypto_err("Error in SSL_CTX use_certificate_file");
 170                 goto setup_error;
 171         }
 172         if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) {
 173                 log_err("Error for server-key-file: %s", s_key);
 174                 log_crypto_err("Error in SSL_CTX use_PrivateKey_file");
 175                 goto setup_error;
 176         }
 177         if(!SSL_CTX_check_private_key(rc->ctx)) {
 178                 log_err("Error for server-key-file: %s", s_key);
 179                 log_crypto_err("Error in SSL_CTX check_private_key");
 180                 goto setup_error;
 181         }
 182         if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) {
 183                 log_crypto_err("Error setting up SSL_CTX verify locations");
 184         setup_error:
 185                 free(s_cert);
 186                 free(s_key);
 187                 daemon_remote_delete(rc);
 188                 return NULL;
 189         }
 190         SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert));
 191         SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL);
 192         free(s_cert);
 193         free(s_key);
 194
 195         return rc;
 196 }
 197
 198 void daemon_remote_clear(struct daemon_remote* rc)
 199 {
 200         struct rc_state* p, *np;
 201         if(!rc) return;
 202         /* but do not close the ports */
 203         listen_list_delete(rc->accept_list);
 204         rc->accept_list = NULL;
 205         /* do close these sockets */
 206         p = rc->busy_list;
 207         while(p) {
 208                 np = p->next;
 209                 if(p->ssl)
 210                         SSL_free(p->ssl);
 211                 comm_point_delete(p->c);
 212                 free(p);
 213                 p = np;
 214         }
 215         rc->busy_list = NULL;
 216         rc->active = 0;
 217         rc->worker = NULL;
 218 }
 219
 220 void daemon_remote_delete(struct daemon_remote* rc)
 221 {
 222         if(!rc) return;
 223         daemon_remote_clear(rc);
 224         if(rc->ctx) {
 225                 SSL_CTX_free(rc->ctx);
 226         }
 227         free(rc);
 228 }
 229
 230 /**
 231  * Add and open a new control port
 232  * @param ip: ip str
 233  * @param nr: port nr
 234  * @param list: list head
 235  * @param noproto_is_err: if lack of protocol support is an error.
 236  * @return false on failure.
 237  */
 238 static int
 239 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err)
 240 {
 241         struct addrinfo hints;
 242         struct addrinfo* res;
 243         struct listen_port* n;
 244         int noproto;
 245         int fd, r;
 246         char port[15];
 247         snprintf(port, sizeof(port), "%d", nr);
 248         port[sizeof(port)-1]=0;
 249         memset(&hints, 0, sizeof(hints));
 250         hints.ai_socktype = SOCK_STREAM;
 251         hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
 252         if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
 253 #ifdef USE_WINSOCK
 254                 if(!noproto_is_err && r == EAI_NONAME) {
 255                         /* tried to lookup the address as name */
 256                         return 1; /* return success, but do nothing */
 257                 }
 258 #endif /* USE_WINSOCK */
 259                 log_err("control interface %s:%s getaddrinfo: %s %s",
 260                         ip?ip:"default", port, gai_strerror(r),
 261 #ifdef EAI_SYSTEM
 262                         r==EAI_SYSTEM?(char*)strerror(errno):""
 263 #else
 264                         ""
 265 #endif
 266                         );
 267                 return 0;
 268         }
 269
 270         /* open fd */
 271         fd = create_tcp_accept_sock(res, 1, &noproto);
 272         freeaddrinfo(res);
 273         if(fd == -1 && noproto) {
 274                 if(!noproto_is_err)
 275                         return 1; /* return success, but do nothing */
 276                 log_err("cannot open control interface %s %d : "
 277                         "protocol not supported", ip, nr);
 278                 return 0;
 279         }
 280         if(fd == -1) {
 281                 log_err("cannot open control interface %s %d", ip, nr);
 282                 return 0;
 283         }
 284
 285         /* alloc */
 286         n = (struct listen_port*)calloc(1, sizeof(*n));
 287         if(!n) {
 288 #ifndef USE_WINSOCK
 289                 close(fd);
 290 #else
 291                 closesocket(fd);
 292 #endif
 293                 log_err("out of memory");
 294                 return 0;
 295         }
 296         n->next = *list;
 297         *list = n;
 298         n->fd = fd;
 299         return 1;
 300 }
 301
 302 struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
 303 {
 304         struct listen_port* l = NULL;
 305         log_assert(cfg->remote_control_enable && cfg->control_port);
 306         if(cfg->control_ifs) {
 307                 struct config_strlist* p;
 308                 for(p = cfg->control_ifs; p; p = p->next) {
 309                         if(!add_open(p->str, cfg->control_port, &l, 1)) {
 310                                 listening_ports_free(l);
 311                                 return NULL;
 312                         }
 313                 }
 314         } else {
 315                 /* defaults */
 316                 if(cfg->do_ip6 &&
 317                         !add_open("::1", cfg->control_port, &l, 0)) {
 318                         listening_ports_free(l);
 319                         return NULL;
 320                 }
 321                 if(cfg->do_ip4 &&
 322                         !add_open("127.0.0.1", cfg->control_port, &l, 1)) {
 323                         listening_ports_free(l);
 324                         return NULL;
 325                 }
 326         }
 327         return l;
 328 }
 329
 330 /** open accept commpoint */
 331 static int
 332 accept_open(struct daemon_remote* rc, int fd)
 333 {
 334         struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
 335         if(!n) {
 336                 log_err("out of memory");
 337                 return 0;
 338         }
 339         n->next = rc->accept_list;
 340         rc->accept_list = n;
 341         /* open commpt */
 342         n->com = comm_point_create_raw(rc->worker->base, fd, 0,
 343                 &remote_accept_callback, rc);
 344         if(!n->com)
 345                 return 0;
 346         /* keep this port open, its fd is kept in the rc portlist */
 347         n->com->do_not_close = 1;
 348         return 1;
 349 }
 350
 351 int daemon_remote_open_accept(struct daemon_remote* rc,
 352         struct listen_port* ports, struct worker* worker)
 353 {
 354         struct listen_port* p;
 355         rc->worker = worker;
 356         for(p = ports; p; p = p->next) {
 357                 if(!accept_open(rc, p->fd)) {
 358                         log_err("could not create accept comm point");
 359                         return 0;
 360                 }
 361         }
 362         return 1;
 363 }
 364
 365 void daemon_remote_stop_accept(struct daemon_remote* rc)
 366 {
 367         struct listen_list* p;
 368         for(p=rc->accept_list; p; p=p->next) {
 369                 comm_point_stop_listening(p->com);
 370         }
 371 }
 372
 373 void daemon_remote_start_accept(struct daemon_remote* rc)
 374 {
 375         struct listen_list* p;
 376         for(p=rc->accept_list; p; p=p->next) {
 377                 comm_point_start_listening(p->com, -1, -1);
 378         }
 379 }
 380
 381 int remote_accept_callback(struct comm_point* c, void* arg, int err,
 382         struct comm_reply* ATTR_UNUSED(rep))
 383 {
 384         struct daemon_remote* rc = (struct daemon_remote*)arg;
 385         struct sockaddr_storage addr;
 386         socklen_t addrlen;
 387         int newfd;
 388         struct rc_state* n;
 389         if(err != NETEVENT_NOERROR) {
 390                 log_err("error %d on remote_accept_callback", err);
 391                 return 0;
 392         }
 393         /* perform the accept */
 394         newfd = comm_point_perform_accept(c, &addr, &addrlen);
 395         if(newfd == -1)
 396                 return 0;
 397         /* create new commpoint unless we are servicing already */
 398         if(rc->active >= rc->max_active) {
 399                 log_warn("drop incoming remote control: too many connections");
 400         close_exit:
 401 #ifndef USE_WINSOCK
 402                 close(newfd);
 403 #else
 404                 closesocket(newfd);
 405 #endif
 406                 return 0;
 407         }
 408
 409         /* setup commpoint to service the remote control command */
 410         n = (struct rc_state*)calloc(1, sizeof(*n));
 411         if(!n) {
 412                 log_err("out of memory");
 413                 goto close_exit;
 414         }
 415         /* start in reading state */
 416         n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
 417                 &remote_control_callback, n);
 418         if(!n->c) {
 419                 log_err("out of memory");
 420                 free(n);
 421                 goto close_exit;
 422         }
 423         log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
 424         n->c->do_not_close = 0;
 425         comm_point_stop_listening(n->c);
 426         comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
 427         memcpy(&n->c->repinfo.addr, &addr, addrlen);
 428         n->c->repinfo.addrlen = addrlen;
 429         n->shake_state = rc_hs_read;
 430         n->ssl = SSL_new(rc->ctx);
 431         if(!n->ssl) {
 432                 log_crypto_err("could not SSL_new");
 433                 comm_point_delete(n->c);
 434                 free(n);
 435                 goto close_exit;
 436         }
 437         SSL_set_accept_state(n->ssl);
 438         (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
 439         if(!SSL_set_fd(n->ssl, newfd)) {
 440                 log_crypto_err("could not SSL_set_fd");
 441                 SSL_free(n->ssl);
 442                 comm_point_delete(n->c);
 443                 free(n);
 444                 goto close_exit;
 445         }
 446
 447         n->rc = rc;
 448         n->next = rc->busy_list;
 449         rc->busy_list = n;
 450         rc->active ++;
 451
 452         /* perform the first nonblocking read already, for windows,
 453          * so it can return wouldblock. could be faster too. */
 454         (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
 455         return 0;
 456 }
 457
 458 /** delete from list */
 459 static void
 460 state_list_remove_elem(struct rc_state** list, struct comm_point* c)
 461 {
 462         while(*list) {
 463                 if( (*list)->c == c) {
 464                         *list = (*list)->next;
 465                         return;
 466                 }
 467                 list = &(*list)->next;
 468         }
 469 }
 470
 471 /** decrease active count and remove commpoint from busy list */
 472 static void
 473 clean_point(struct daemon_remote* rc, struct rc_state* s)
 474 {
 475         state_list_remove_elem(&rc->busy_list, s->c);
 476         rc->active --;
 477         if(s->ssl) {
 478                 SSL_shutdown(s->ssl);
 479                 SSL_free(s->ssl);
 480         }
 481         comm_point_delete(s->c);
 482         free(s);
 483 }
 484
 485 int
 486 ssl_print_text(SSL* ssl, const char* text)
 487 {
 488         int r;
 489         if(!ssl)
 490                 return 0;
 491         ERR_clear_error();
 492         if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) {
 493                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 494                         verbose(VERB_QUERY, "warning, in SSL_write, peer "
 495                                 "closed connection");
 496                         return 0;
 497                 }
 498                 log_crypto_err("could not SSL_write");
 499                 return 0;
 500         }
 501         return 1;
 502 }
 503
 504 /** print text over the ssl connection */
 505 static int
 506 ssl_print_vmsg(SSL* ssl, const char* format, va_list args)
 507 {
 508         char msg[1024];
 509         vsnprintf(msg, sizeof(msg), format, args);
 510         return ssl_print_text(ssl, msg);
 511 }
 512
 513 /** printf style printing to the ssl connection */
 514 int ssl_printf(SSL* ssl, const char* format, ...)
 515 {
 516         va_list args;
 517         int ret;
 518         va_start(args, format);
 519         ret = ssl_print_vmsg(ssl, format, args);
 520         va_end(args);
 521         return ret;
 522 }
 523
 524 int
 525 ssl_read_line(SSL* ssl, char* buf, size_t max)
 526 {
 527         int r;
 528         size_t len = 0;
 529         if(!ssl)
 530                 return 0;
 531         while(len < max) {
 532                 ERR_clear_error();
 533                 if((r=SSL_read(ssl, buf+len, 1)) <= 0) {
 534                         if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
 535                                 buf[len] = 0;
 536                                 return 1;
 537                         }
 538                         log_crypto_err("could not SSL_read");
 539                         return 0;
 540                 }
 541                 if(buf[len] == '\n') {
 542                         /* return string without \n */
 543                         buf[len] = 0;
 544                         return 1;
 545                 }
 546                 len++;
 547         }
 548         buf[max-1] = 0;
 549         log_err("control line too long (%d): %s", (int)max, buf);
 550         return 0;
 551 }
 552
 553 /** skip whitespace, return new pointer into string */
 554 static char*
 555 skipwhite(char* str)
 556 {
 557         /* EOS \0 is not a space */
 558         while( isspace(*str) )
 559                 str++;
 560         return str;
 561 }
 562
 563 /** send the OK to the control client */
 564 static void send_ok(SSL* ssl)
 565 {
 566         (void)ssl_printf(ssl, "ok\n");
 567 }
 568
 569 /** do the stop command */
 570 static void
 571 do_stop(SSL* ssl, struct daemon_remote* rc)
 572 {
 573         rc->worker->need_to_exit = 1;
 574         comm_base_exit(rc->worker->base);
 575         send_ok(ssl);
 576 }
 577
 578 /** do the reload command */
 579 static void
 580 do_reload(SSL* ssl, struct daemon_remote* rc)
 581 {
 582         rc->worker->need_to_exit = 0;
 583         comm_base_exit(rc->worker->base);
 584         send_ok(ssl);
 585 }
 586
 587 /** do the verbosity command */
 588 static void
 589 do_verbosity(SSL* ssl, char* str)
 590 {
 591         int val = atoi(str);
 592         if(val == 0 && strcmp(str, "0") != 0) {
 593                 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str);
 594                 return;
 595         }
 596         verbosity = val;
 597         send_ok(ssl);
 598 }
 599
 600 /** print stats from statinfo */
 601 static int
 602 print_stats(SSL* ssl, const char* nm, struct stats_info* s)
 603 {
 604         struct timeval avg;
 605         if(!ssl_printf(ssl, "%s.num.queries"SQ"%u\n", nm,
 606                 (unsigned)s->svr.num_queries)) return 0;
 607         if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%u\n", nm,
 608                 (unsigned)(s->svr.num_queries
 609                         - s->svr.num_queries_missed_cache))) return 0;
 610         if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%u\n", nm,
 611                 (unsigned)s->svr.num_queries_missed_cache)) return 0;
 612         if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%u\n", nm,
 613                 (unsigned)s->svr.num_queries_prefetch)) return 0;
 614         if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%u\n", nm,
 615                 (unsigned)s->mesh_replies_sent)) return 0;
 616         if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm,
 617                 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 618                         (double)s->svr.sum_query_list_size/
 619                         (s->svr.num_queries_missed_cache+
 620                         s->svr.num_queries_prefetch) : 0.0)) return 0;
 621         if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%u\n", nm,
 622                 (unsigned)s->svr.max_query_list_size)) return 0;
 623         if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%u\n", nm,
 624                 (unsigned)s->mesh_jostled)) return 0;
 625         if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%u\n", nm,
 626                 (unsigned)s->mesh_dropped)) return 0;
 627         if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%u\n", nm,
 628                 (unsigned)s->mesh_num_states)) return 0;
 629         if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%u\n", nm,
 630                 (unsigned)s->mesh_num_reply_states)) return 0;
 631         timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
 632         if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ"%d.%6.6d\n", nm,
 633                 (int)avg.tv_sec, (int)avg.tv_usec)) return 0;
 634         if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm,
 635                 s->mesh_time_median)) return 0;
 636         return 1;
 637 }
 638
 639 /** print stats for one thread */
 640 static int
 641 print_thread_stats(SSL* ssl, int i, struct stats_info* s)
 642 {
 643         char nm[16];
 644         snprintf(nm, sizeof(nm), "thread%d", i);
 645         nm[sizeof(nm)-1]=0;
 646         return print_stats(ssl, nm, s);
 647 }
 648
 649 /** print long number */
 650 static int
 651 print_longnum(SSL* ssl, const char* desc, size_t x)
 652 {
 653         if(x > 1024*1024*1024) {
 654                 /* more than a Gb */
 655                 size_t front = x / (size_t)1000000;
 656                 size_t back = x % (size_t)1000000;
 657                 return ssl_printf(ssl, "%s%u%6.6u\n", desc,
 658                         (unsigned)front, (unsigned)back);
 659         } else {
 660                 return ssl_printf(ssl, "%s%u\n", desc, (unsigned)x);
 661         }
 662 }
 663
 664 /** print mem stats */
 665 static int
 666 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon)
 667 {
 668         int m;
 669         size_t msg, rrset, val, iter;
 670 #ifdef HAVE_SBRK
 671         extern void* unbound_start_brk;
 672         void* cur = sbrk(0);
 673         if(!print_longnum(ssl, "mem.total.sbrk"SQ,
 674                 (size_t)((char*)cur - (char*)unbound_start_brk))) return 0;
 675 #endif /* HAVE_SBRK */
 676         msg = slabhash_get_mem(daemon->env->msg_cache);
 677         rrset = slabhash_get_mem(&daemon->env->rrset_cache->table);
 678         val=0;
 679         iter=0;
 680         m = modstack_find(&worker->env.mesh->mods, "validator");
 681         if(m != -1) {
 682                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 683                         mods.mod[m]->get_mem));
 684                 val = (*worker->env.mesh->mods.mod[m]->get_mem)
 685                         (&worker->env, m);
 686         }
 687         m = modstack_find(&worker->env.mesh->mods, "iterator");
 688         if(m != -1) {
 689                 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh->
 690                         mods.mod[m]->get_mem));
 691                 iter = (*worker->env.mesh->mods.mod[m]->get_mem)
 692                         (&worker->env, m);
 693         }
 694
 695         if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset))
 696                 return 0;
 697         if(!print_longnum(ssl, "mem.cache.message"SQ, msg))
 698                 return 0;
 699         if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter))
 700                 return 0;
 701         if(!print_longnum(ssl, "mem.mod.validator"SQ, val))
 702                 return 0;
 703         return 1;
 704 }
 705
 706 /** print uptime stats */
 707 static int
 708 print_uptime(SSL* ssl, struct worker* worker, int reset)
 709 {
 710         struct timeval now = *worker->env.now_tv;
 711         struct timeval up, dt;
 712         timeval_subtract(&up, &now, &worker->daemon->time_boot);
 713         timeval_subtract(&dt, &now, &worker->daemon->time_last_stat);
 714         if(reset)
 715                 worker->daemon->time_last_stat = now;
 716         if(!ssl_printf(ssl, "time.now"SQ"%d.%6.6d\n",
 717                 (unsigned)now.tv_sec, (unsigned)now.tv_usec)) return 0;
 718         if(!ssl_printf(ssl, "time.up"SQ"%d.%6.6d\n",
 719                 (unsigned)up.tv_sec, (unsigned)up.tv_usec)) return 0;
 720         if(!ssl_printf(ssl, "time.elapsed"SQ"%d.%6.6d\n",
 721                 (unsigned)dt.tv_sec, (unsigned)dt.tv_usec)) return 0;
 722         return 1;
 723 }
 724
 725 /** print extended histogram */
 726 static int
 727 print_hist(SSL* ssl, struct stats_info* s)
 728 {
 729         struct timehist* hist;
 730         size_t i;
 731         hist = timehist_setup();
 732         if(!hist) {
 733                 log_err("out of memory");
 734                 return 0;
 735         }
 736         timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
 737         for(i=0; i<hist->num; i++) {
 738                 if(!ssl_printf(ssl,
 739                         "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%u\n",
 740                         (int)hist->buckets[i].lower.tv_sec,
 741                         (int)hist->buckets[i].lower.tv_usec,
 742                         (int)hist->buckets[i].upper.tv_sec,
 743                         (int)hist->buckets[i].upper.tv_usec,
 744                         (unsigned)hist->buckets[i].count)) {
 745                         timehist_delete(hist);
 746                         return 0;
 747                 }
 748         }
 749         timehist_delete(hist);
 750         return 1;
 751 }
 752
 753 /** print extended stats */
 754 static int
 755 print_ext(SSL* ssl, struct stats_info* s)
 756 {
 757         int i;
 758         char nm[16];
 759         const ldns_rr_descriptor* desc;
 760         const ldns_lookup_table* lt;
 761         /* TYPE */
 762         for(i=0; i<STATS_QTYPE_NUM; i++) {
 763                 if(inhibit_zero && s->svr.qtype[i] == 0)
 764                         continue;
 765                 desc = ldns_rr_descript((uint16_t)i);
 766                 if(desc && desc->_name) {
 767                         snprintf(nm, sizeof(nm), "%s", desc->_name);
 768                 } else if (i == LDNS_RR_TYPE_IXFR) {
 769                         snprintf(nm, sizeof(nm), "IXFR");
 770                 } else if (i == LDNS_RR_TYPE_AXFR) {
 771                         snprintf(nm, sizeof(nm), "AXFR");
 772                 } else if (i == LDNS_RR_TYPE_MAILA) {
 773                         snprintf(nm, sizeof(nm), "MAILA");
 774                 } else if (i == LDNS_RR_TYPE_MAILB) {
 775                         snprintf(nm, sizeof(nm), "MAILB");
 776                 } else if (i == LDNS_RR_TYPE_ANY) {
 777                         snprintf(nm, sizeof(nm), "ANY");
 778                 } else {
 779                         snprintf(nm, sizeof(nm), "TYPE%d", i);
 780                 }
 781                 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%u\n",
 782                         nm, (unsigned)s->svr.qtype[i])) return 0;
 783         }
 784         if(!inhibit_zero || s->svr.qtype_big) {
 785                 if(!ssl_printf(ssl, "num.query.type.other"SQ"%u\n",
 786                         (unsigned)s->svr.qtype_big)) return 0;
 787         }
 788         /* CLASS */
 789         for(i=0; i<STATS_QCLASS_NUM; i++) {
 790                 if(inhibit_zero && s->svr.qclass[i] == 0)
 791                         continue;
 792                 lt = ldns_lookup_by_id(ldns_rr_classes, i);
 793                 if(lt && lt->name) {
 794                         snprintf(nm, sizeof(nm), "%s", lt->name);
 795                 } else {
 796                         snprintf(nm, sizeof(nm), "CLASS%d", i);
 797                 }
 798                 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%u\n",
 799                         nm, (unsigned)s->svr.qclass[i])) return 0;
 800         }
 801         if(!inhibit_zero || s->svr.qclass_big) {
 802                 if(!ssl_printf(ssl, "num.query.class.other"SQ"%u\n",
 803                         (unsigned)s->svr.qclass_big)) return 0;
 804         }
 805         /* OPCODE */
 806         for(i=0; i<STATS_OPCODE_NUM; i++) {
 807                 if(inhibit_zero && s->svr.qopcode[i] == 0)
 808                         continue;
 809                 lt = ldns_lookup_by_id(ldns_opcodes, i);
 810                 if(lt && lt->name) {
 811                         snprintf(nm, sizeof(nm), "%s", lt->name);
 812                 } else {
 813                         snprintf(nm, sizeof(nm), "OPCODE%d", i);
 814                 }
 815                 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%u\n",
 816                         nm, (unsigned)s->svr.qopcode[i])) return 0;
 817         }
 818         /* transport */
 819         if(!ssl_printf(ssl, "num.query.tcp"SQ"%u\n",
 820                 (unsigned)s->svr.qtcp)) return 0;
 821         if(!ssl_printf(ssl, "num.query.ipv6"SQ"%u\n",
 822                 (unsigned)s->svr.qipv6)) return 0;
 823         /* flags */
 824         if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%u\n",
 825                 (unsigned)s->svr.qbit_QR)) return 0;
 826         if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%u\n",
 827                 (unsigned)s->svr.qbit_AA)) return 0;
 828         if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%u\n",
 829                 (unsigned)s->svr.qbit_TC)) return 0;
 830         if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%u\n",
 831                 (unsigned)s->svr.qbit_RD)) return 0;
 832         if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%u\n",
 833                 (unsigned)s->svr.qbit_RA)) return 0;
 834         if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%u\n",
 835                 (unsigned)s->svr.qbit_Z)) return 0;
 836         if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%u\n",
 837                 (unsigned)s->svr.qbit_AD)) return 0;
 838         if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%u\n",
 839                 (unsigned)s->svr.qbit_CD)) return 0;
 840         if(!ssl_printf(ssl, "num.query.edns.present"SQ"%u\n",
 841                 (unsigned)s->svr.qEDNS)) return 0;
 842         if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%u\n",
 843                 (unsigned)s->svr.qEDNS_DO)) return 0;
 844
 845         /* RCODE */
 846         for(i=0; i<STATS_RCODE_NUM; i++) {
 847                 if(inhibit_zero && s->svr.ans_rcode[i] == 0)
 848                         continue;
 849                 lt = ldns_lookup_by_id(ldns_rcodes, i);
 850                 if(lt && lt->name) {
 851                         snprintf(nm, sizeof(nm), "%s", lt->name);
 852                 } else {
 853                         snprintf(nm, sizeof(nm), "RCODE%d", i);
 854                 }
 855                 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%u\n",
 856                         nm, (unsigned)s->svr.ans_rcode[i])) return 0;
 857         }
 858         if(!inhibit_zero || s->svr.ans_rcode_nodata) {
 859                 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%u\n",
 860                         (unsigned)s->svr.ans_rcode_nodata)) return 0;
 861         }
 862         /* validation */
 863         if(!ssl_printf(ssl, "num.answer.secure"SQ"%u\n",
 864                 (unsigned)s->svr.ans_secure)) return 0;
 865         if(!ssl_printf(ssl, "num.answer.bogus"SQ"%u\n",
 866                 (unsigned)s->svr.ans_bogus)) return 0;
 867         if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%u\n",
 868                 (unsigned)s->svr.rrset_bogus)) return 0;
 869         /* threat detection */
 870         if(!ssl_printf(ssl, "unwanted.queries"SQ"%u\n",
 871                 (unsigned)s->svr.unwanted_queries)) return 0;
 872         if(!ssl_printf(ssl, "unwanted.replies"SQ"%u\n",
 873                 (unsigned)s->svr.unwanted_replies)) return 0;
 874         return 1;
 875 }
 876
 877 /** do the stats command */
 878 static void
 879 do_stats(SSL* ssl, struct daemon_remote* rc, int reset)
 880 {
 881         struct daemon* daemon = rc->worker->daemon;
 882         struct stats_info total;
 883         struct stats_info s;
 884         int i;
 885         log_assert(daemon->num > 0);
 886         /* gather all thread statistics in one place */
 887         for(i=0; i<daemon->num; i++) {
 888                 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset);
 889                 if(!print_thread_stats(ssl, i, &s))
 890                         return;
 891                 if(i == 0)
 892                         total = s;
 893                 else    server_stats_add(&total, &s);
 894         }
 895         /* print the thread statistics */
 896         total.mesh_time_median /= (double)daemon->num;
 897         if(!print_stats(ssl, "total", &total))
 898                 return;
 899         if(!print_uptime(ssl, rc->worker, reset))
 900                 return;
 901         if(daemon->cfg->stat_extended) {
 902                 if(!print_mem(ssl, rc->worker, daemon))
 903                         return;
 904                 if(!print_hist(ssl, &total))
 905                         return;
 906                 if(!print_ext(ssl, &total))
 907                         return;
 908         }
 909 }
 910
 911 /** parse commandline argument domain name */
 912 static int
 913 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
 914 {
 915         ldns_rdf* rdf;
 916         *res = NULL;
 917         *len = 0;
 918         *labs = 0;
 919         rdf = ldns_dname_new_frm_str(str);
 920         if(!rdf) {
 921                 ssl_printf(ssl, "error cannot parse name %s\n", str);
 922                 return 0;
 923         }
 924         *res = memdup(ldns_rdf_data(rdf), ldns_rdf_size(rdf));
 925         ldns_rdf_deep_free(rdf);
 926         if(!*res) {
 927                 ssl_printf(ssl, "error out of memory\n");
 928                 return 0;
 929         }
 930         *labs = dname_count_size_labels(*res, len);
 931         return 1;
 932 }
 933
 934 /** find second argument, modifies string */
 935 static int
 936 find_arg2(SSL* ssl, char* arg, char** arg2)
 937 {
 938         char* as = strchr(arg, ' ');
 939         char* at = strchr(arg, '\t');
 940         if(as && at) {
 941                 if(at < as)
 942                         as = at;
 943                 as[0]=0;
 944                 *arg2 = skipwhite(as+1);
 945         } else if(as) {
 946                 as[0]=0;
 947                 *arg2 = skipwhite(as+1);
 948         } else if(at) {
 949                 at[0]=0;
 950                 *arg2 = skipwhite(at+1);
 951         } else {
 952                 ssl_printf(ssl, "error could not find next argument "
 953                         "after %s\n", arg);
 954                 return 0;
 955         }
 956         return 1;
 957 }
 958
 959 /** Add a new zone */
 960 static void
 961 do_zone_add(SSL* ssl, struct worker* worker, char* arg)
 962 {
 963         uint8_t* nm;
 964         int nmlabs;
 965         size_t nmlen;
 966         char* arg2;
 967         enum localzone_type t;
 968         struct local_zone* z;
 969         if(!find_arg2(ssl, arg, &arg2))
 970                 return;
 971         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
 972                 return;
 973         if(!local_zone_str2type(arg2, &t)) {
 974                 ssl_printf(ssl, "error not a zone type. %s\n", arg2);
 975                 free(nm);
 976                 return;
 977         }
 978         lock_quick_lock(&worker->daemon->local_zones->lock);
 979         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
 980                 nmlabs, LDNS_RR_CLASS_IN))) {
 981                 /* already present in tree */
 982                 lock_rw_wrlock(&z->lock);
 983                 z->type = t; /* update type anyway */
 984                 lock_rw_unlock(&z->lock);
 985                 free(nm);
 986                 lock_quick_unlock(&worker->daemon->local_zones->lock);
 987                 send_ok(ssl);
 988                 return;
 989         }
 990         if(!local_zones_add_zone(worker->daemon->local_zones, nm, nmlen,
 991                 nmlabs, LDNS_RR_CLASS_IN, t)) {
 992                 lock_quick_unlock(&worker->daemon->local_zones->lock);
 993                 ssl_printf(ssl, "error out of memory\n");
 994                 return;
 995         }
 996         lock_quick_unlock(&worker->daemon->local_zones->lock);
 997         send_ok(ssl);
 998 }
 999
1000 /** Remove a zone */
1001 static void
1002 do_zone_remove(SSL* ssl, struct worker* worker, char* arg)
1003 {
1004         uint8_t* nm;
1005         int nmlabs;
1006         size_t nmlen;
1007         struct local_zone* z;
1008         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1009                 return;
1010         lock_quick_lock(&worker->daemon->local_zones->lock);
1011         if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen,
1012                 nmlabs, LDNS_RR_CLASS_IN))) {
1013                 /* present in tree */
1014                 local_zones_del_zone(worker->daemon->local_zones, z);
1015         }
1016         lock_quick_unlock(&worker->daemon->local_zones->lock);
1017         free(nm);
1018         send_ok(ssl);
1019 }
1020
1021 /** Add new RR data */
1022 static void
1023 do_data_add(SSL* ssl, struct worker* worker, char* arg)
1024 {
1025         if(!local_zones_add_RR(worker->daemon->local_zones, arg,
1026                 worker->env.scratch_buffer)) {
1027                 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg);
1028                 return;
1029         }
1030         send_ok(ssl);
1031 }
1032
1033 /** Remove RR data */
1034 static void
1035 do_data_remove(SSL* ssl, struct worker* worker, char* arg)
1036 {
1037         uint8_t* nm;
1038         int nmlabs;
1039         size_t nmlen;
1040         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1041                 return;
1042         local_zones_del_data(worker->daemon->local_zones, nm,
1043                 nmlen, nmlabs, LDNS_RR_CLASS_IN);
1044         free(nm);
1045         send_ok(ssl);
1046 }
1047
1048 /** cache lookup of nameservers */
1049 static void
1050 do_lookup(SSL* ssl, struct worker* worker, char* arg)
1051 {
1052         uint8_t* nm;
1053         int nmlabs;
1054         size_t nmlen;
1055         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1056                 return;
1057         (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs);
1058         free(nm);
1059 }
1060
1061 /** flush something from rrset and msg caches */
1062 static void
1063 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen,
1064         uint16_t t, uint16_t c)
1065 {
1066         hashvalue_t h;
1067         struct query_info k;
1068         rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0);
1069         if(t == LDNS_RR_TYPE_SOA)
1070                 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c,
1071                         PACKED_RRSET_SOA_NEG);
1072         k.qname = nm;
1073         k.qname_len = nmlen;
1074         k.qtype = t;
1075         k.qclass = c;
1076         h = query_info_hash(&k);
1077         slabhash_remove(worker->env.msg_cache, h, &k);
1078 }
1079
1080 /** flush a type */
1081 static void
1082 do_flush_type(SSL* ssl, struct worker* worker, char* arg)
1083 {
1084         uint8_t* nm;
1085         int nmlabs;
1086         size_t nmlen;
1087         char* arg2;
1088         uint16_t t;
1089         if(!find_arg2(ssl, arg, &arg2))
1090                 return;
1091         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1092                 return;
1093         t = ldns_get_rr_type_by_name(arg2);
1094         do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN);
1095
1096         free(nm);
1097         send_ok(ssl);
1098 }
1099
1100 /** flush statistics */
1101 static void
1102 do_flush_stats(SSL* ssl, struct worker* worker)
1103 {
1104         worker_stats_clear(worker);
1105         send_ok(ssl);
1106 }
1107
1108 /**
1109  * Local info for deletion functions
1110  */
1111 struct del_info {
1112         /** worker */
1113         struct worker* worker;
1114         /** name to delete */
1115         uint8_t* name;
1116         /** length */
1117         size_t len;
1118         /** labels */
1119         int labs;
1120         /** now */
1121         uint32_t now;
1122         /** time to invalidate to */
1123         uint32_t expired;
1124         /** number of rrsets removed */
1125         size_t num_rrsets;
1126         /** number of msgs removed */
1127         size_t num_msgs;
1128         /** number of key entries removed */
1129         size_t num_keys;
1130         /** length of addr */
1131         socklen_t addrlen;
1132         /** socket address for host deletion */
1133         struct sockaddr_storage addr;
1134 };
1135
1136 /** callback to delete hosts in infra cache */
1137 static void
1138 infra_del_host(struct lruhash_entry* e, void* arg)
1139 {
1140         /* entry is locked */
1141         struct del_info* inf = (struct del_info*)arg;
1142         struct infra_key* k = (struct infra_key*)e->key;
1143         if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) {
1144                 struct infra_data* d = (struct infra_data*)e->data;
1145                 d->probedelay = 0;
1146                 d->timeout_A = 0;
1147                 d->timeout_AAAA = 0;
1148                 d->timeout_other = 0;
1149                 rtt_init(&d->rtt);
1150                 if(d->ttl >= inf->now) {
1151                         d->ttl = inf->expired;
1152                         inf->num_keys++;
1153                 }
1154         }
1155 }
1156
1157 /** flush infra cache */
1158 static void
1159 do_flush_infra(SSL* ssl, struct worker* worker, char* arg)
1160 {
1161         struct sockaddr_storage addr;
1162         socklen_t len;
1163         struct del_info inf;
1164         if(strcmp(arg, "all") == 0) {
1165                 slabhash_clear(worker->env.infra_cache->hosts);
1166                 send_ok(ssl);
1167                 return;
1168         }
1169         if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) {
1170                 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg);
1171                 return;
1172         }
1173         /* delete all entries from cache */
1174         /* what we do is to set them all expired */
1175         inf.worker = worker;
1176         inf.name = 0;
1177         inf.len = 0;
1178         inf.labs = 0;
1179         inf.now = *worker->env.now;
1180         inf.expired = *worker->env.now;
1181         inf.expired -= 3; /* handle 3 seconds skew between threads */
1182         inf.num_rrsets = 0;
1183         inf.num_msgs = 0;
1184         inf.num_keys = 0;
1185         inf.addrlen = len;
1186         memmove(&inf.addr, &addr, len);
1187         slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host,
1188                 &inf);
1189         send_ok(ssl);
1190 }
1191
1192 /** flush requestlist */
1193 static void
1194 do_flush_requestlist(SSL* ssl, struct worker* worker)
1195 {
1196         mesh_delete_all(worker->env.mesh);
1197         send_ok(ssl);
1198 }
1199
1200 /** callback to delete rrsets in a zone */
1201 static void
1202 zone_del_rrset(struct lruhash_entry* e, void* arg)
1203 {
1204         /* entry is locked */
1205         struct del_info* inf = (struct del_info*)arg;
1206         struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key;
1207         if(dname_subdomain_c(k->rk.dname, inf->name)) {
1208                 struct packed_rrset_data* d =
1209                         (struct packed_rrset_data*)e->data;
1210                 if(d->ttl >= inf->now) {
1211                         d->ttl = inf->expired;
1212                         inf->num_rrsets++;
1213                 }
1214         }
1215 }
1216
1217 /** callback to delete messages in a zone */
1218 static void
1219 zone_del_msg(struct lruhash_entry* e, void* arg)
1220 {
1221         /* entry is locked */
1222         struct del_info* inf = (struct del_info*)arg;
1223         struct msgreply_entry* k = (struct msgreply_entry*)e->key;
1224         if(dname_subdomain_c(k->key.qname, inf->name)) {
1225                 struct reply_info* d = (struct reply_info*)e->data;
1226                 if(d->ttl >= inf->now) {
1227                         d->ttl = inf->expired;
1228                         inf->num_msgs++;
1229                 }
1230         }
1231 }
1232
1233 /** callback to delete keys in zone */
1234 static void
1235 zone_del_kcache(struct lruhash_entry* e, void* arg)
1236 {
1237         /* entry is locked */
1238         struct del_info* inf = (struct del_info*)arg;
1239         struct key_entry_key* k = (struct key_entry_key*)e->key;
1240         if(dname_subdomain_c(k->name, inf->name)) {
1241                 struct key_entry_data* d = (struct key_entry_data*)e->data;
1242                 if(d->ttl >= inf->now) {
1243                         d->ttl = inf->expired;
1244                         inf->num_keys++;
1245                 }
1246         }
1247 }
1248
1249 /** remove all rrsets and keys from zone from cache */
1250 static void
1251 do_flush_zone(SSL* ssl, struct worker* worker, char* arg)
1252 {
1253         uint8_t* nm;
1254         int nmlabs;
1255         size_t nmlen;
1256         struct del_info inf;
1257         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1258                 return;
1259         /* delete all RRs and key entries from zone */
1260         /* what we do is to set them all expired */
1261         inf.worker = worker;
1262         inf.name = nm;
1263         inf.len = nmlen;
1264         inf.labs = nmlabs;
1265         inf.now = *worker->env.now;
1266         inf.expired = *worker->env.now;
1267         inf.expired -= 3; /* handle 3 seconds skew between threads */
1268         inf.num_rrsets = 0;
1269         inf.num_msgs = 0;
1270         inf.num_keys = 0;
1271         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1272                 &zone_del_rrset, &inf);
1273
1274         slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf);
1275
1276         /* and validator cache */
1277         if(worker->env.key_cache) {
1278                 slabhash_traverse(worker->env.key_cache->slab, 1,
1279                         &zone_del_kcache, &inf);
1280         }
1281
1282         free(nm);
1283
1284         (void)ssl_printf(ssl, "ok removed %u rrsets, %u messages "
1285                 "and %u key entries\n", (unsigned)inf.num_rrsets,
1286                 (unsigned)inf.num_msgs, (unsigned)inf.num_keys);
1287 }
1288
1289 /** callback to delete bogus rrsets */
1290 static void
1291 bogus_del_rrset(struct lruhash_entry* e, void* arg)
1292 {
1293         /* entry is locked */
1294         struct del_info* inf = (struct del_info*)arg;
1295         struct packed_rrset_data* d = (struct packed_rrset_data*)e->data;
1296         if(d->security == sec_status_bogus) {
1297                 d->ttl = inf->expired;
1298                 inf->num_rrsets++;
1299         }
1300 }
1301
1302 /** callback to delete bogus messages */
1303 static void
1304 bogus_del_msg(struct lruhash_entry* e, void* arg)
1305 {
1306         /* entry is locked */
1307         struct del_info* inf = (struct del_info*)arg;
1308         struct reply_info* d = (struct reply_info*)e->data;
1309         if(d->security == sec_status_bogus) {
1310                 d->ttl = inf->expired;
1311                 inf->num_msgs++;
1312         }
1313 }
1314
1315 /** callback to delete bogus keys */
1316 static void
1317 bogus_del_kcache(struct lruhash_entry* e, void* arg)
1318 {
1319         /* entry is locked */
1320         struct del_info* inf = (struct del_info*)arg;
1321         struct key_entry_data* d = (struct key_entry_data*)e->data;
1322         if(d->isbad) {
1323                 d->ttl = inf->expired;
1324                 inf->num_keys++;
1325         }
1326 }
1327
1328 /** remove all rrsets and keys from zone from cache */
1329 static void
1330 do_flush_bogus(SSL* ssl, struct worker* worker)
1331 {
1332         struct del_info inf;
1333         /* what we do is to set them all expired */
1334         inf.worker = worker;
1335         inf.now = *worker->env.now;
1336         inf.expired = *worker->env.now;
1337         inf.expired -= 3; /* handle 3 seconds skew between threads */
1338         inf.num_rrsets = 0;
1339         inf.num_msgs = 0;
1340         inf.num_keys = 0;
1341         slabhash_traverse(&worker->env.rrset_cache->table, 1,
1342                 &bogus_del_rrset, &inf);
1343
1344         slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf);
1345
1346         /* and validator cache */
1347         if(worker->env.key_cache) {
1348                 slabhash_traverse(worker->env.key_cache->slab, 1,
1349                         &bogus_del_kcache, &inf);
1350         }
1351
1352         (void)ssl_printf(ssl, "ok removed %u rrsets, %u messages "
1353                 "and %u key entries\n", (unsigned)inf.num_rrsets,
1354                 (unsigned)inf.num_msgs, (unsigned)inf.num_keys);
1355 }
1356
1357 /** remove name rrset from cache */
1358 static void
1359 do_flush_name(SSL* ssl, struct worker* w, char* arg)
1360 {
1361         uint8_t* nm;
1362         int nmlabs;
1363         size_t nmlen;
1364         if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs))
1365                 return;
1366         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN);
1367         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN);
1368         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN);
1369         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN);
1370         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN);
1371         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN);
1372         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN);
1373         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN);
1374         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN);
1375         do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN);
1376
1377         free(nm);
1378         send_ok(ssl);
1379 }
1380
1381 /** printout a delegation point info */
1382 static int
1383 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass,
1384         struct delegpt* dp)
1385 {
1386         char buf[257];
1387         struct delegpt_ns* ns;
1388         struct delegpt_addr* a;
1389         int f = 0;
1390         if(str) { /* print header for forward, stub */
1391                 char* c = ldns_rr_class2str(dclass);
1392                 dname_str(nm, buf);
1393                 if(!ssl_printf(ssl, "%s %s %s: ", buf, c, str)) {
1394                         free(c);
1395                         return 0;
1396                 }
1397                 free(c);
1398         }
1399         for(ns = dp->nslist; ns; ns = ns->next) {
1400                 dname_str(ns->name, buf);
1401                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1402                         return 0;
1403                 f = 1;
1404         }
1405         for(a = dp->target_list; a; a = a->next_target) {
1406                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
1407                 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf))
1408                         return 0;
1409                 f = 1;
1410         }
1411         return ssl_printf(ssl, "\n");
1412 }
1413
1414
1415 /** print root forwards */
1416 static int
1417 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root)
1418 {
1419         struct delegpt* dp;
1420         dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
1421         if(!dp)
1422                 return ssl_printf(ssl, "off (using root hints)\n");
1423         /* if dp is returned it must be the root */
1424         log_assert(query_dname_compare(dp->name, root)==0);
1425         return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
1426 }
1427
1428 /** parse args into delegpt */
1429 static struct delegpt*
1430 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names)
1431 {
1432         /* parse args and add in */
1433         char* p = args;
1434         char* todo;
1435         struct delegpt* dp = delegpt_create_mlc(nm);
1436         struct sockaddr_storage addr;
1437         socklen_t addrlen;
1438         if(!dp) {
1439                 (void)ssl_printf(ssl, "error out of memory\n");
1440                 return NULL;
1441         }
1442         while(p) {
1443                 todo = p;
1444                 p = strchr(p, ' '); /* find next spot, if any */
1445                 if(p) {
1446                         *p++ = 0;       /* end this spot */
1447                         p = skipwhite(p); /* position at next spot */
1448                 }
1449                 /* parse address */
1450                 if(!extstrtoaddr(todo, &addr, &addrlen)) {
1451                         if(allow_names) {
1452                                 uint8_t* n = NULL;
1453                                 size_t ln;
1454                                 int lb;
1455                                 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) {
1456                                         (void)ssl_printf(ssl, "error cannot "
1457                                                 "parse IP address or name "
1458                                                 "'%s'\n", todo);
1459                                         delegpt_free_mlc(dp);
1460                                         return NULL;
1461                                 }
1462                                 if(!delegpt_add_ns_mlc(dp, n, 0)) {
1463                                         (void)ssl_printf(ssl, "error out of memory\n");
1464                                         free(n);
1465                                         delegpt_free_mlc(dp);
1466                                         return NULL;
1467                                 }
1468                                 free(n);
1469
1470                         } else {
1471                                 (void)ssl_printf(ssl, "error cannot parse"
1472                                         " IP address '%s'\n", todo);
1473                                 delegpt_free_mlc(dp);
1474                                 return NULL;
1475                         }
1476                 } else {
1477                         /* add address */
1478                         if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) {
1479                                 (void)ssl_printf(ssl, "error out of memory\n");
1480                                 delegpt_free_mlc(dp);
1481                                 return NULL;
1482                         }
1483                 }
1484         }
1485         return dp;
1486 }
1487
1488 /** do the status command */
1489 static void
1490 do_forward(SSL* ssl, struct worker* worker, char* args)
1491 {
1492         struct iter_forwards* fwd = worker->env.fwds;
1493         uint8_t* root = (uint8_t*)"\000";
1494         if(!fwd) {
1495                 (void)ssl_printf(ssl, "error: structure not allocated\n");
1496                 return;
1497         }
1498         if(args == NULL || args[0] == 0) {
1499                 (void)print_root_fwds(ssl, fwd, root);
1500                 return;
1501         }
1502         /* set root forwards for this thread. since we are in remote control
1503          * the actual mesh is not running, so we can freely edit it. */
1504         /* delete all the existing queries first */
1505         mesh_delete_all(worker->env.mesh);
1506         if(strcmp(args, "off") == 0) {
1507                 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
1508         } else {
1509                 struct delegpt* dp;
1510                 if(!(dp = parse_delegpt(ssl, args, root, 0)))
1511                         return;
1512                 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1513                         (void)ssl_printf(ssl, "error out of memory\n");
1514                         return;
1515                 }
1516         }
1517         send_ok(ssl);
1518 }
1519
1520 static int
1521 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp,
1522         int* insecure, int* prime)
1523 {
1524         char* zonename;
1525         char* rest;
1526         size_t nmlen;
1527         int nmlabs;
1528         /* parse all -x args */
1529         while(args[0] == '+') {
1530                 if(!find_arg2(ssl, args, &rest))
1531                         return 0;
1532                 while(*(++args) != 0) {
1533                         if(*args == 'i' && insecure)
1534                                 *insecure = 1;
1535                         else if(*args == 'p' && prime)
1536                                 *prime = 1;
1537                         else {
1538                                 (void)ssl_printf(ssl, "error: unknown option %s\n", args);
1539                                 return 0;
1540                         }
1541                 }
1542                 args = rest;
1543         }
1544         /* parse name */
1545         if(dp) {
1546                 if(!find_arg2(ssl, args, &rest))
1547                         return 0;
1548                 zonename = args;
1549                 args = rest;
1550         } else  zonename = args;
1551         if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs))
1552                 return 0;
1553
1554         /* parse dp */
1555         if(dp) {
1556                 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) {
1557                         free(*nm);
1558                         return 0;
1559                 }
1560         }
1561         return 1;
1562 }
1563
1564 /** do the forward_add command */
1565 static void
1566 do_forward_add(SSL* ssl, struct worker* worker, char* args)
1567 {
1568         struct iter_forwards* fwd = worker->env.fwds;
1569         int insecure = 0;
1570         uint8_t* nm = NULL;
1571         struct delegpt* dp = NULL;
1572         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
1573                 return;
1574         if(insecure) {
1575                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1576                         nm)) {
1577                         (void)ssl_printf(ssl, "error out of memory\n");
1578                         delegpt_free_mlc(dp);
1579                         free(nm);
1580                         return;
1581                 }
1582         }
1583         if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
1584                 (void)ssl_printf(ssl, "error out of memory\n");
1585                 free(nm);
1586                 return;
1587         }
1588         free(nm);
1589         send_ok(ssl);
1590 }
1591
1592 /** do the forward_remove command */
1593 static void
1594 do_forward_remove(SSL* ssl, struct worker* worker, char* args)
1595 {
1596         struct iter_forwards* fwd = worker->env.fwds;
1597         int insecure = 0;
1598         uint8_t* nm = NULL;
1599         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1600                 return;
1601         if(insecure)
1602                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1603                         nm);
1604         forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
1605         free(nm);
1606         send_ok(ssl);
1607 }
1608
1609 /** do the stub_add command */
1610 static void
1611 do_stub_add(SSL* ssl, struct worker* worker, char* args)
1612 {
1613         struct iter_forwards* fwd = worker->env.fwds;
1614         int insecure = 0, prime = 0;
1615         uint8_t* nm = NULL;
1616         struct delegpt* dp = NULL;
1617         if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
1618                 return;
1619         if(insecure) {
1620                 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1621                         nm)) {
1622                         (void)ssl_printf(ssl, "error out of memory\n");
1623                         delegpt_free_mlc(dp);
1624                         free(nm);
1625                         return;
1626                 }
1627         }
1628         if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
1629                 if(insecure) anchors_delete_insecure(worker->env.anchors,
1630                         LDNS_RR_CLASS_IN, nm);
1631                 (void)ssl_printf(ssl, "error out of memory\n");
1632                 delegpt_free_mlc(dp);
1633                 free(nm);
1634                 return;
1635         }
1636         if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
1637                 (void)ssl_printf(ssl, "error out of memory\n");
1638                 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1639                 if(insecure) anchors_delete_insecure(worker->env.anchors,
1640                         LDNS_RR_CLASS_IN, nm);
1641                 free(nm);
1642                 return;
1643         }
1644         free(nm);
1645         send_ok(ssl);
1646 }
1647
1648 /** do the stub_remove command */
1649 static void
1650 do_stub_remove(SSL* ssl, struct worker* worker, char* args)
1651 {
1652         struct iter_forwards* fwd = worker->env.fwds;
1653         int insecure = 0;
1654         uint8_t* nm = NULL;
1655         if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
1656                 return;
1657         if(insecure)
1658                 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
1659                         nm);
1660         forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
1661         hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
1662         free(nm);
1663         send_ok(ssl);
1664 }
1665
1666 /** do the status command */
1667 static void
1668 do_status(SSL* ssl, struct worker* worker)
1669 {
1670         int i;
1671         time_t uptime;
1672         if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION))
1673                 return;
1674         if(!ssl_printf(ssl, "verbosity: %d\n", verbosity))
1675                 return;
1676         if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num))
1677                 return;
1678         if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num))
1679                 return;
1680         for(i=0; i<worker->daemon->mods.num; i++) {
1681                 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name))
1682                         return;
1683         }
1684         if(!ssl_printf(ssl, " ]\n"))
1685                 return;
1686         uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec;
1687         if(!ssl_printf(ssl, "uptime: %u seconds\n", (unsigned)uptime))
1688                 return;
1689         if(!ssl_printf(ssl, "unbound (pid %d) is running...\n",
1690                 (int)getpid()))
1691                 return;
1692 }
1693
1694 /** get age for the mesh state */
1695 static void
1696 get_mesh_age(struct mesh_state* m, char* buf, size_t len,
1697         struct module_env* env)
1698 {
1699         if(m->reply_list) {
1700                 struct timeval d;
1701                 struct mesh_reply* r = m->reply_list;
1702                 /* last reply is the oldest */
1703                 while(r && r->next)
1704                         r = r->next;
1705                 timeval_subtract(&d, env->now_tv, &r->start_time);
1706                 snprintf(buf, len, "%d.%6.6d", (int)d.tv_sec, (int)d.tv_usec);
1707         } else {
1708                 snprintf(buf, len, "-");
1709         }
1710 }
1711
1712 /** get status of a mesh state */
1713 static void
1714 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m,
1715         char* buf, size_t len)
1716 {
1717         enum module_ext_state s = m->s.ext_state[m->s.curmod];
1718         const char *modname = mesh->mods.mod[m->s.curmod]->name;
1719         size_t l;
1720         if(strcmp(modname, "iterator") == 0 && s == module_wait_reply &&
1721                 m->s.minfo[m->s.curmod]) {
1722                 /* break into iterator to find out who its waiting for */
1723                 struct iter_qstate* qstate = (struct iter_qstate*)
1724                         m->s.minfo[m->s.curmod];
1725                 struct outbound_list* ol = &qstate->outlist;
1726                 struct outbound_entry* e;
1727                 snprintf(buf, len, "%s wait for", modname);
1728                 l = strlen(buf);
1729                 buf += l; len -= l;
1730                 if(ol->first == NULL)
1731                         snprintf(buf, len, " (empty_list)");
1732                 for(e = ol->first; e; e = e->next) {
1733                         snprintf(buf, len, " ");
1734                         l = strlen(buf);
1735                         buf += l; len -= l;
1736                         addr_to_str(&e->qsent->addr, e->qsent->addrlen,
1737                                 buf, len);
1738                         l = strlen(buf);
1739                         buf += l; len -= l;
1740                 }
1741         } else if(s == module_wait_subquery) {
1742                 /* look in subs from mesh state to see what */
1743                 char nm[257];
1744                 struct mesh_state_ref* sub;
1745                 snprintf(buf, len, "%s wants", modname);
1746                 l = strlen(buf);
1747                 buf += l; len -= l;
1748                 if(m->sub_set.count == 0)
1749                         snprintf(buf, len, " (empty_list)");
1750                 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) {
1751                         char* t = ldns_rr_type2str(sub->s->s.qinfo.qtype);
1752                         char* c = ldns_rr_class2str(sub->s->s.qinfo.qclass);
1753                         dname_str(sub->s->s.qinfo.qname, nm);
1754                         snprintf(buf, len, " %s %s %s", t, c, nm);
1755                         l = strlen(buf);
1756                         buf += l; len -= l;
1757                         free(t);
1758                         free(c);
1759                 }
1760         } else {
1761                 snprintf(buf, len, "%s is %s", modname, strextstate(s));
1762         }
1763 }
1764
1765 /** do the dump_requestlist command */
1766 static void
1767 do_dump_requestlist(SSL* ssl, struct worker* worker)
1768 {
1769         struct mesh_area* mesh;
1770         struct mesh_state* m;
1771         int num = 0;
1772         char buf[257];
1773         char timebuf[32];
1774         char statbuf[10240];
1775         if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num))
1776                 return;
1777         if(!ssl_printf(ssl, "#   type cl name    seconds    module status\n"))
1778                 return;
1779         /* show worker mesh contents */
1780         mesh = worker->env.mesh;
1781         if(!mesh) return;
1782         RBTREE_FOR(m, struct mesh_state*, &mesh->all) {
1783                 char* t = ldns_rr_type2str(m->s.qinfo.qtype);
1784                 char* c = ldns_rr_class2str(m->s.qinfo.qclass);
1785                 dname_str(m->s.qinfo.qname, buf);
1786                 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env);
1787                 get_mesh_status(mesh, m, statbuf, sizeof(statbuf));
1788                 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n",
1789                         num, t, c, buf, timebuf, statbuf)) {
1790                         free(t);
1791                         free(c);
1792                         return;
1793                 }
1794                 num++;
1795                 free(t);
1796                 free(c);
1797         }
1798 }
1799
1800 /** structure for argument data for dump infra host */
1801 struct infra_arg {
1802         /** the infra cache */
1803         struct infra_cache* infra;
1804         /** the SSL connection */
1805         SSL* ssl;
1806         /** the time now */
1807         uint32_t now;
1808 };
1809
1810 /** callback for every host element in the infra cache */
1811 static void
1812 dump_infra_host(struct lruhash_entry* e, void* arg)
1813 {
1814         struct infra_arg* a = (struct infra_arg*)arg;
1815         struct infra_key* k = (struct infra_key*)e->key;
1816         struct infra_data* d = (struct infra_data*)e->data;
1817         char ip_str[1024];
1818         char name[257];
1819         addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str));
1820         dname_str(k->zonename, name);
1821         /* skip expired stuff (only backed off) */
1822         if(d->ttl < a->now) {
1823                 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
1824                         if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str,
1825                                 name, d->rtt.rto)) return;
1826                 }
1827                 return;
1828         }
1829         if(!ssl_printf(a->ssl, "%s %s ttl %d ping %d var %d rtt %d rto %d "
1830                 "tA %d tAAAA %d tother %d "
1831                 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d "
1832                 "other %d\n", ip_str, name, (int)(d->ttl - a->now),
1833                 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto,
1834                 d->timeout_A, d->timeout_AAAA, d->timeout_other,
1835                 (int)d->edns_lame_known, (int)d->edns_version,
1836                 (int)(a->now<d->probedelay?d->probedelay-a->now:0),
1837                 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A,
1838                 (int)d->lame_other))
1839                 return;
1840 }
1841
1842 /** do the dump_infra command */
1843 static void
1844 do_dump_infra(SSL* ssl, struct worker* worker)
1845 {
1846         struct infra_arg arg;
1847         arg.infra = worker->env.infra_cache;
1848         arg.ssl = ssl;
1849         arg.now = *worker->env.now;
1850         slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg);
1851 }
1852
1853 /** do the log_reopen command */
1854 static void
1855 do_log_reopen(SSL* ssl, struct worker* worker)
1856 {
1857         struct config_file* cfg = worker->env.cfg;
1858         send_ok(ssl);
1859         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
1860 }
1861
1862 /** do the set_option command */
1863 static void
1864 do_set_option(SSL* ssl, struct worker* worker, char* arg)
1865 {
1866         char* arg2;
1867         if(!find_arg2(ssl, arg, &arg2))
1868                 return;
1869         if(!config_set_option(worker->env.cfg, arg, arg2)) {
1870                 (void)ssl_printf(ssl, "error setting option\n");
1871                 return;
1872         }
1873         send_ok(ssl);
1874 }
1875
1876 /* routine to printout option values over SSL */
1877 void remote_get_opt_ssl(char* line, void* arg)
1878 {
1879         SSL* ssl = (SSL*)arg;
1880         (void)ssl_printf(ssl, "%s\n", line);
1881 }
1882
1883 /** do the get_option command */
1884 static void
1885 do_get_option(SSL* ssl, struct worker* worker, char* arg)
1886 {
1887         int r;
1888         r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl);
1889         if(!r) {
1890                 (void)ssl_printf(ssl, "error unknown option\n");
1891                 return;
1892         }
1893 }
1894
1895 /** do the list_forwards command */
1896 static void
1897 do_list_forwards(SSL* ssl, struct worker* worker)
1898 {
1899         /* since its a per-worker structure no locks needed */
1900         struct iter_forwards* fwds = worker->env.fwds;
1901         struct iter_forward_zone* z;
1902         RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
1903                 if(!z->dp) continue; /* skip empty marker for stub */
1904                 if(!ssl_print_name_dp(ssl, "forward", z->name, z->dclass,
1905                         z->dp))
1906                         return;
1907         }
1908 }
1909
1910 /** do the list_stubs command */
1911 static void
1912 do_list_stubs(SSL* ssl, struct worker* worker)
1913 {
1914         struct iter_hints_stub* z;
1915         RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
1916                 if(!ssl_print_name_dp(ssl,
1917                         z->noprime?"stub noprime":"stub prime", z->node.name,
1918                         z->node.dclass, z->dp))
1919                         return;
1920         }
1921 }
1922
1923 /** do the list_local_zones command */
1924 static void
1925 do_list_local_zones(SSL* ssl, struct worker* worker)
1926 {
1927         struct local_zones* zones = worker->daemon->local_zones;
1928         struct local_zone* z;
1929         char buf[257];
1930         lock_quick_lock(&zones->lock);
1931         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
1932                 lock_rw_rdlock(&z->lock);
1933                 dname_str(z->name, buf);
1934                 (void)ssl_printf(ssl, "%s %s\n", buf,
1935                         local_zone_type2str(z->type));
1936                 lock_rw_unlock(&z->lock);
1937         }
1938         lock_quick_unlock(&zones->lock);
1939 }
1940
1941 /** do the list_local_data command */
1942 static void
1943 do_list_local_data(SSL* ssl, struct worker* worker)
1944 {
1945         struct local_zones* zones = worker->daemon->local_zones;
1946         struct local_zone* z;
1947         struct local_data* d;
1948         struct local_rrset* p;
1949         lock_quick_lock(&zones->lock);
1950         RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
1951                 lock_rw_rdlock(&z->lock);
1952                 RBTREE_FOR(d, struct local_data*, &z->data) {
1953                         for(p = d->rrsets; p; p = p->next) {
1954                                 ldns_rr_list* rr = packed_rrset_to_rr_list(
1955                                         p->rrset, worker->env.scratch_buffer);
1956                                 char* str = ldns_rr_list2str(rr);
1957                                 (void)ssl_printf(ssl, "%s", str);
1958                                 free(str);
1959                                 ldns_rr_list_free(rr);
1960                         }
1961                 }
1962                 lock_rw_unlock(&z->lock);
1963         }
1964         lock_quick_unlock(&zones->lock);
1965 }
1966
1967 /** tell other processes to execute the command */
1968 static void
1969 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd)
1970 {
1971         int i;
1972         if(!cmd || !ssl)
1973                 return;
1974         /* skip i=0 which is me */
1975         for(i=1; i<rc->worker->daemon->num; i++) {
1976                 worker_send_cmd(rc->worker->daemon->workers[i],
1977                         worker_cmd_remote);
1978                 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd,
1979                         (uint8_t*)cmd, strlen(cmd)+1, 0)) {
1980                         ssl_printf(ssl, "error could not distribute cmd\n");
1981                         return;
1982                 }
1983         }
1984 }
1985
1986 /** check for name with end-of-string, space or tab after it */
1987 static int
1988 cmdcmp(char* p, const char* cmd, size_t len)
1989 {
1990         return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t');
1991 }
1992
1993 /** execute a remote control command */
1994 static void
1995 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd,
1996         struct worker* worker)
1997 {
1998         char* p = skipwhite(cmd);
1999         /* compare command */
2000         if(cmdcmp(p, "stop", 4)) {
2001                 do_stop(ssl, rc);
2002                 return;
2003         } else if(cmdcmp(p, "reload", 6)) {
2004                 do_reload(ssl, rc);
2005                 return;
2006         } else if(cmdcmp(p, "stats_noreset", 13)) {
2007                 do_stats(ssl, rc, 0);
2008                 return;
2009         } else if(cmdcmp(p, "stats", 5)) {
2010                 do_stats(ssl, rc, 1);
2011                 return;
2012         } else if(cmdcmp(p, "status", 6)) {
2013                 do_status(ssl, worker);
2014                 return;
2015         } else if(cmdcmp(p, "dump_cache", 10)) {
2016                 (void)dump_cache(ssl, worker);
2017                 return;
2018         } else if(cmdcmp(p, "load_cache", 10)) {
2019                 if(load_cache(ssl, worker)) send_ok(ssl);
2020                 return;
2021         } else if(cmdcmp(p, "list_forwards", 13)) {
2022                 do_list_forwards(ssl, worker);
2023                 return;
2024         } else if(cmdcmp(p, "list_stubs", 10)) {
2025                 do_list_stubs(ssl, worker);
2026                 return;
2027         } else if(cmdcmp(p, "list_local_zones", 16)) {
2028                 do_list_local_zones(ssl, worker);
2029                 return;
2030         } else if(cmdcmp(p, "list_local_data", 15)) {
2031                 do_list_local_data(ssl, worker);
2032                 return;
2033         } else if(cmdcmp(p, "stub_add", 8)) {
2034                 /* must always distribute this cmd */
2035                 if(rc) distribute_cmd(rc, ssl, cmd);
2036                 do_stub_add(ssl, worker, skipwhite(p+8));
2037                 return;
2038         } else if(cmdcmp(p, "stub_remove", 11)) {
2039                 /* must always distribute this cmd */
2040                 if(rc) distribute_cmd(rc, ssl, cmd);
2041                 do_stub_remove(ssl, worker, skipwhite(p+11));
2042                 return;
2043         } else if(cmdcmp(p, "forward_add", 11)) {
2044                 /* must always distribute this cmd */
2045                 if(rc) distribute_cmd(rc, ssl, cmd);
2046                 do_forward_add(ssl, worker, skipwhite(p+11));
2047                 return;
2048         } else if(cmdcmp(p, "forward_remove", 14)) {
2049                 /* must always distribute this cmd */
2050                 if(rc) distribute_cmd(rc, ssl, cmd);
2051                 do_forward_remove(ssl, worker, skipwhite(p+14));
2052                 return;
2053         } else if(cmdcmp(p, "forward", 7)) {
2054                 /* must always distribute this cmd */
2055                 if(rc) distribute_cmd(rc, ssl, cmd);
2056                 do_forward(ssl, worker, skipwhite(p+7));
2057                 return;
2058         } else if(cmdcmp(p, "flush_stats", 11)) {
2059                 /* must always distribute this cmd */
2060                 if(rc) distribute_cmd(rc, ssl, cmd);
2061                 do_flush_stats(ssl, worker);
2062                 return;
2063         } else if(cmdcmp(p, "flush_requestlist", 17)) {
2064                 /* must always distribute this cmd */
2065                 if(rc) distribute_cmd(rc, ssl, cmd);
2066                 do_flush_requestlist(ssl, worker);
2067                 return;
2068         } else if(cmdcmp(p, "lookup", 6)) {
2069                 do_lookup(ssl, worker, skipwhite(p+6));
2070                 return;
2071         }
2072
2073 #ifdef THREADS_DISABLED
2074         /* other processes must execute the command as well */
2075         /* commands that should not be distributed, returned above. */
2076         if(rc) { /* only if this thread is the master (rc) thread */
2077                 /* done before the code below, which may split the string */
2078                 distribute_cmd(rc, ssl, cmd);
2079         }
2080 #endif
2081         if(cmdcmp(p, "verbosity", 9)) {
2082                 do_verbosity(ssl, skipwhite(p+9));
2083         } else if(cmdcmp(p, "local_zone_remove", 17)) {
2084                 do_zone_remove(ssl, worker, skipwhite(p+17));
2085         } else if(cmdcmp(p, "local_zone", 10)) {
2086                 do_zone_add(ssl, worker, skipwhite(p+10));
2087         } else if(cmdcmp(p, "local_data_remove", 17)) {
2088                 do_data_remove(ssl, worker, skipwhite(p+17));
2089         } else if(cmdcmp(p, "local_data", 10)) {
2090                 do_data_add(ssl, worker, skipwhite(p+10));
2091         } else if(cmdcmp(p, "flush_zone", 10)) {
2092                 do_flush_zone(ssl, worker, skipwhite(p+10));
2093         } else if(cmdcmp(p, "flush_type", 10)) {
2094                 do_flush_type(ssl, worker, skipwhite(p+10));
2095         } else if(cmdcmp(p, "flush_infra", 11)) {
2096                 do_flush_infra(ssl, worker, skipwhite(p+11));
2097         } else if(cmdcmp(p, "flush", 5)) {
2098                 do_flush_name(ssl, worker, skipwhite(p+5));
2099         } else if(cmdcmp(p, "dump_requestlist", 16)) {
2100                 do_dump_requestlist(ssl, worker);
2101         } else if(cmdcmp(p, "dump_infra", 10)) {
2102                 do_dump_infra(ssl, worker);
2103         } else if(cmdcmp(p, "log_reopen", 10)) {
2104                 do_log_reopen(ssl, worker);
2105         } else if(cmdcmp(p, "set_option", 10)) {
2106                 do_set_option(ssl, worker, skipwhite(p+10));
2107         } else if(cmdcmp(p, "get_option", 10)) {
2108                 do_get_option(ssl, worker, skipwhite(p+10));
2109         } else if(cmdcmp(p, "flush_bogus", 11)) {
2110                 do_flush_bogus(ssl, worker);
2111         } else {
2112                 (void)ssl_printf(ssl, "error unknown command '%s'\n", p);
2113         }
2114 }
2115
2116 void
2117 daemon_remote_exec(struct worker* worker)
2118 {
2119         /* read the cmd string */
2120         uint8_t* msg = NULL;
2121         uint32_t len = 0;
2122         if(!tube_read_msg(worker->cmd, &msg, &len, 0)) {
2123                 log_err("daemon_remote_exec: tube_read_msg failed");
2124                 return;
2125         }
2126         verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg);
2127         execute_cmd(NULL, NULL, (char*)msg, worker);
2128         free(msg);
2129 }
2130
2131 /** handle remote control request */
2132 static void
2133 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl)
2134 {
2135         int r;
2136         char pre[10];
2137         char magic[7];
2138         char buf[1024];
2139 #ifdef USE_WINSOCK
2140         /* makes it possible to set the socket blocking again. */
2141         /* basically removes it from winsock_event ... */
2142         WSAEventSelect(s->c->fd, NULL, 0);
2143 #endif
2144         fd_set_block(s->c->fd);
2145
2146         /* try to read magic UBCT[version]_space_ string */
2147         ERR_clear_error();
2148         if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) {
2149                 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN)
2150                         return;
2151                 log_crypto_err("could not SSL_read");
2152                 return;
2153         }
2154         magic[6] = 0;
2155         if( r != 6 || strncmp(magic, "UBCT", 4) != 0) {
2156                 verbose(VERB_QUERY, "control connection has bad magic string");
2157                 /* probably wrong tool connected, ignore it completely */
2158                 return;
2159         }
2160
2161         /* read the command line */
2162         if(!ssl_read_line(ssl, buf, sizeof(buf))) {
2163                 return;
2164         }
2165         snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
2166         if(strcmp(magic, pre) != 0) {
2167                 verbose(VERB_QUERY, "control connection had bad "
2168                         "version %s, cmd: %s", magic, buf);
2169                 ssl_printf(ssl, "error version mismatch\n");
2170                 return;
2171         }
2172         verbose(VERB_DETAIL, "control cmd: %s", buf);
2173
2174         /* figure out what to do */
2175         execute_cmd(rc, ssl, buf, rc->worker);
2176 }
2177
2178 int remote_control_callback(struct comm_point* c, void* arg, int err,
2179         struct comm_reply* ATTR_UNUSED(rep))
2180 {
2181         struct rc_state* s = (struct rc_state*)arg;
2182         struct daemon_remote* rc = s->rc;
2183         int r;
2184         if(err != NETEVENT_NOERROR) {
2185                 if(err==NETEVENT_TIMEOUT)
2186                         log_err("remote control timed out");
2187                 clean_point(rc, s);
2188                 return 0;
2189         }
2190         /* (continue to) setup the SSL connection */
2191         ERR_clear_error();
2192         r = SSL_do_handshake(s->ssl);
2193         if(r != 1) {
2194                 int r2 = SSL_get_error(s->ssl, r);
2195                 if(r2 == SSL_ERROR_WANT_READ) {
2196                         if(s->shake_state == rc_hs_read) {
2197                                 /* try again later */
2198                                 return 0;
2199                         }
2200                         s->shake_state = rc_hs_read;
2201                         comm_point_listen_for_rw(c, 1, 0);
2202                         return 0;
2203                 } else if(r2 == SSL_ERROR_WANT_WRITE) {
2204                         if(s->shake_state == rc_hs_write) {
2205                                 /* try again later */
2206                                 return 0;
2207                         }
2208                         s->shake_state = rc_hs_write;
2209                         comm_point_listen_for_rw(c, 0, 1);
2210                         return 0;
2211                 } else {
2212                         if(r == 0)
2213                                 log_err("remote control connection closed prematurely");
2214                         log_addr(1, "failed connection from",
2215                                 &s->c->repinfo.addr, s->c->repinfo.addrlen);
2216                         log_crypto_err("remote control failed ssl");
2217                         clean_point(rc, s);
2218                         return 0;
2219                 }
2220         }
2221         s->shake_state = rc_none;
2222
2223         /* once handshake has completed, check authentication */
2224         if(SSL_get_verify_result(s->ssl) == X509_V_OK) {
2225                 X509* x = SSL_get_peer_certificate(s->ssl);
2226                 if(!x) {
2227                         verbose(VERB_DETAIL, "remote control connection "
2228                                 "provided no client certificate");
2229                         clean_point(rc, s);
2230                         return 0;
2231                 }
2232                 verbose(VERB_ALGO, "remote control connection authenticated");
2233                 X509_free(x);
2234         } else {
2235                 verbose(VERB_DETAIL, "remote control connection failed to "
2236                         "authenticate with client certificate");
2237                 clean_point(rc, s);
2238                 return 0;
2239         }
2240
2241         /* if OK start to actually handle the request */
2242         handle_req(rc, s, s->ssl);
2243
2244         verbose(VERB_ALGO, "remote control operation completed");
2245         clean_point(rc, s);
2246         return 0;
2247 }