1 /* 2 * daemon/remote.c - remote control for the unbound daemon. 3 * 4 * Copyright (c) 2008, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * This file contains the remote control functionality for the daemon. 40 * The remote control can be performed using either the commandline 41 * unbound-control tool, or a TLS capable web browser. 42 * The channel is secured using TLSv1, and certificates. 43 * Both the server and the client(control tool) have their own keys. 44 */ 45 #include "config.h" 46 #ifdef HAVE_OPENSSL_ERR_H 47 #include <openssl/err.h> 48 #endif 49 #ifdef HAVE_OPENSSL_DH_H 50 #include <openssl/dh.h> 51 #endif 52 #ifdef HAVE_OPENSSL_BN_H 53 #include <openssl/bn.h> 54 #endif 55 56 #include <ctype.h> 57 #include "daemon/remote.h" 58 #include "daemon/worker.h" 59 #include "daemon/daemon.h" 60 #include "daemon/stats.h" 61 #include "daemon/cachedump.h" 62 #include "util/log.h" 63 #include "util/config_file.h" 64 #include "util/net_help.h" 65 #include "util/module.h" 66 #include "services/listen_dnsport.h" 67 #include "services/cache/rrset.h" 68 #include "services/cache/infra.h" 69 #include "services/mesh.h" 70 #include "services/localzone.h" 71 #include "util/storage/slabhash.h" 72 #include "util/fptr_wlist.h" 73 #include "util/data/dname.h" 74 #include "validator/validator.h" 75 #include "validator/val_kcache.h" 76 #include "validator/val_kentry.h" 77 #include "validator/val_anchor.h" 78 #include "iterator/iterator.h" 79 #include "iterator/iter_fwd.h" 80 #include "iterator/iter_hints.h" 81 #include "iterator/iter_delegpt.h" 82 #include "services/outbound_list.h" 83 #include "services/outside_network.h" 84 #include "sldns/str2wire.h" 85 #include "sldns/parseutil.h" 86 #include "sldns/wire2str.h" 87 #include "sldns/sbuffer.h" 88 89 #ifdef HAVE_SYS_TYPES_H 90 # include <sys/types.h> 91 #endif 92 #ifdef HAVE_SYS_STAT_H 93 #include <sys/stat.h> 94 #endif 95 #ifdef HAVE_NETDB_H 96 #include <netdb.h> 97 #endif 98 99 /* just for portability */ 100 #ifdef SQ 101 #undef SQ 102 #endif 103 104 /** what to put on statistics lines between var and value, ": " or "=" */ 105 #define SQ "=" 106 /** if true, inhibits a lot of =0 lines from the stats output */ 107 static const int inhibit_zero = 1; 108 109 /** subtract timers and the values do not overflow or become negative */ 110 static void 111 timeval_subtract(struct timeval* d, const struct timeval* end, 112 const struct timeval* start) 113 { 114 #ifndef S_SPLINT_S 115 time_t end_usec = end->tv_usec; 116 d->tv_sec = end->tv_sec - start->tv_sec; 117 if(end_usec < start->tv_usec) { 118 end_usec += 1000000; 119 d->tv_sec--; 120 } 121 d->tv_usec = end_usec - start->tv_usec; 122 #endif 123 } 124 125 /** divide sum of timers to get average */ 126 static void 127 timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d) 128 { 129 #ifndef S_SPLINT_S 130 size_t leftover; 131 if(d == 0) { 132 avg->tv_sec = 0; 133 avg->tv_usec = 0; 134 return; 135 } 136 avg->tv_sec = sum->tv_sec / d; 137 avg->tv_usec = sum->tv_usec / d; 138 /* handle fraction from seconds divide */ 139 leftover = sum->tv_sec - avg->tv_sec*d; 140 avg->tv_usec += (leftover*1000000)/d; 141 #endif 142 } 143 144 /* 145 * The following function was generated using the openssl utility, using 146 * the command : "openssl dhparam -C 2048" 147 * (some openssl versions reject DH that is 'too small', eg. 512). 148 */ 149 #ifndef S_SPLINT_S 150 static DH *get_dh2048(void) 151 { 152 static unsigned char dh2048_p[]={ 153 0xE7,0x36,0x28,0x3B,0xE4,0xC3,0x32,0x1C,0x01,0xC3,0x67,0xD6, 154 0xF5,0xF3,0xDA,0xDC,0x71,0xC0,0x42,0x8B,0xE6,0xEB,0x8D,0x80, 155 0x35,0x7F,0x09,0x45,0x30,0xE5,0xB2,0x92,0x81,0x3F,0x08,0xCD, 156 0x36,0x5E,0x19,0x83,0x62,0xCC,0xAE,0x9B,0x81,0x66,0x24,0xEE, 157 0x16,0x6F,0xA9,0x9E,0xF4,0x82,0x1B,0xDD,0x46,0xC7,0x33,0x5D, 158 0xF4,0xCA,0xE6,0x8F,0xFC,0xD4,0xD8,0x58,0x94,0x24,0x5D,0xFF, 159 0x0A,0xE8,0xEF,0x3D,0xCE,0xBB,0x50,0x94,0xE0,0x5F,0xE8,0x41, 160 0xC3,0x35,0x30,0x37,0xD5,0xCB,0x8F,0x3D,0x95,0x15,0x1A,0x77, 161 0x42,0xB2,0x06,0x86,0xF6,0x09,0x66,0x0E,0x9A,0x25,0x94,0x3E, 162 0xD2,0x04,0x25,0x25,0x1D,0x23,0xEB,0xDC,0x4D,0x0C,0x83,0x28, 163 0x2E,0x15,0x81,0x2D,0xC1,0xAF,0x8D,0x36,0x64,0xE3,0x9A,0x83, 164 0x78,0xC2,0x8D,0xC0,0x9D,0xD9,0x3A,0x1C,0xC5,0x2B,0x50,0x68, 165 0x07,0xA9,0x4B,0x8C,0x07,0x57,0xD6,0x15,0x03,0x4E,0x9E,0x01, 166 0xF2,0x6F,0x35,0xAC,0x26,0x9C,0x92,0x68,0x61,0x13,0xFB,0x01, 167 0xBA,0x22,0x36,0x01,0x55,0xB6,0x62,0xD9,0xB2,0x98,0xCE,0x5D, 168 0x4B,0xA5,0x41,0xD6,0xE5,0x70,0x78,0x12,0x1F,0x64,0xB6,0x6F, 169 0xB0,0x91,0x51,0x91,0x92,0xC0,0x94,0x3A,0xD1,0x28,0x4D,0x30, 170 0x84,0x3E,0xE4,0xE4,0x7F,0x47,0x89,0xB1,0xB6,0x8C,0x8E,0x0E, 171 0x26,0xDB,0xCD,0x17,0x07,0x2A,0x21,0x7A,0xCC,0x68,0xE8,0x57, 172 0x94,0x9E,0x59,0x61,0xEC,0x20,0x34,0x26,0x0D,0x66,0x44,0xEB, 173 0x6F,0x02,0x58,0xE2,0xED,0xF6,0xF3,0x1B,0xBF,0x9E,0x45,0x52, 174 0x5A,0x49,0xA1,0x5B, 175 }; 176 static unsigned char dh2048_g[]={ 177 0x02, 178 }; 179 DH *dh = NULL; 180 BIGNUM *p = NULL, *g = NULL; 181 182 dh = DH_new(); 183 p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL); 184 g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL); 185 if (!dh || !p || !g) 186 goto err; 187 188 #if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL) 189 dh->p = p; 190 dh->g = g; 191 #else 192 if (!DH_set0_pqg(dh, p, NULL, g)) 193 goto err; 194 #endif 195 return dh; 196 err: 197 if (p) 198 BN_free(p); 199 if (g) 200 BN_free(g); 201 if (dh) 202 DH_free(dh); 203 return NULL; 204 } 205 #endif /* SPLINT */ 206 207 struct daemon_remote* 208 daemon_remote_create(struct config_file* cfg) 209 { 210 char* s_cert; 211 char* s_key; 212 struct daemon_remote* rc = (struct daemon_remote*)calloc(1, 213 sizeof(*rc)); 214 if(!rc) { 215 log_err("out of memory in daemon_remote_create"); 216 return NULL; 217 } 218 rc->max_active = 10; 219 220 if(!cfg->remote_control_enable) { 221 rc->ctx = NULL; 222 return rc; 223 } 224 rc->ctx = SSL_CTX_new(SSLv23_server_method()); 225 if(!rc->ctx) { 226 log_crypto_err("could not SSL_CTX_new"); 227 free(rc); 228 return NULL; 229 } 230 /* no SSLv2, SSLv3 because has defects */ 231 if((SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 232 != SSL_OP_NO_SSLv2){ 233 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 234 daemon_remote_delete(rc); 235 return NULL; 236 } 237 if((SSL_CTX_set_options(rc->ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 238 != SSL_OP_NO_SSLv3){ 239 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 240 daemon_remote_delete(rc); 241 return NULL; 242 } 243 244 if (cfg->remote_control_use_cert == 0) { 245 /* No certificates are requested */ 246 if(!SSL_CTX_set_cipher_list(rc->ctx, "aNULL")) { 247 log_crypto_err("Failed to set aNULL cipher list"); 248 daemon_remote_delete(rc); 249 return NULL; 250 } 251 252 /* Since we have no certificates and hence no source of 253 * DH params, let's generate and set them 254 */ 255 if(!SSL_CTX_set_tmp_dh(rc->ctx,get_dh2048())) { 256 log_crypto_err("Wanted to set DH param, but failed"); 257 daemon_remote_delete(rc); 258 return NULL; 259 } 260 return rc; 261 } 262 rc->use_cert = 1; 263 s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1); 264 s_key = fname_after_chroot(cfg->server_key_file, cfg, 1); 265 if(!s_cert || !s_key) { 266 log_err("out of memory in remote control fname"); 267 goto setup_error; 268 } 269 verbose(VERB_ALGO, "setup SSL certificates"); 270 if (!SSL_CTX_use_certificate_chain_file(rc->ctx,s_cert)) { 271 log_err("Error for server-cert-file: %s", s_cert); 272 log_crypto_err("Error in SSL_CTX use_certificate_chain_file"); 273 goto setup_error; 274 } 275 if(!SSL_CTX_use_PrivateKey_file(rc->ctx,s_key,SSL_FILETYPE_PEM)) { 276 log_err("Error for server-key-file: %s", s_key); 277 log_crypto_err("Error in SSL_CTX use_PrivateKey_file"); 278 goto setup_error; 279 } 280 if(!SSL_CTX_check_private_key(rc->ctx)) { 281 log_err("Error for server-key-file: %s", s_key); 282 log_crypto_err("Error in SSL_CTX check_private_key"); 283 goto setup_error; 284 } 285 #if HAVE_DECL_SSL_CTX_SET_ECDH_AUTO 286 if(!SSL_CTX_set_ecdh_auto(rc->ctx,1)) { 287 log_crypto_err("Error in SSL_CTX_ecdh_auto, not enabling ECDHE"); 288 } 289 #elif defined(USE_ECDSA) 290 if(1) { 291 EC_KEY *ecdh = EC_KEY_new_by_curve_name (NID_X9_62_prime256v1); 292 if (!ecdh) { 293 log_crypto_err("could not find p256, not enabling ECDHE"); 294 } else { 295 if (1 != SSL_CTX_set_tmp_ecdh (rc->ctx, ecdh)) { 296 log_crypto_err("Error in SSL_CTX_set_tmp_ecdh, not enabling ECDHE"); 297 } 298 EC_KEY_free (ecdh); 299 } 300 } 301 #endif 302 if(!SSL_CTX_load_verify_locations(rc->ctx, s_cert, NULL)) { 303 log_crypto_err("Error setting up SSL_CTX verify locations"); 304 setup_error: 305 free(s_cert); 306 free(s_key); 307 daemon_remote_delete(rc); 308 return NULL; 309 } 310 SSL_CTX_set_client_CA_list(rc->ctx, SSL_load_client_CA_file(s_cert)); 311 SSL_CTX_set_verify(rc->ctx, SSL_VERIFY_PEER, NULL); 312 free(s_cert); 313 free(s_key); 314 315 return rc; 316 } 317 318 void daemon_remote_clear(struct daemon_remote* rc) 319 { 320 struct rc_state* p, *np; 321 if(!rc) return; 322 /* but do not close the ports */ 323 listen_list_delete(rc->accept_list); 324 rc->accept_list = NULL; 325 /* do close these sockets */ 326 p = rc->busy_list; 327 while(p) { 328 np = p->next; 329 if(p->ssl) 330 SSL_free(p->ssl); 331 comm_point_delete(p->c); 332 free(p); 333 p = np; 334 } 335 rc->busy_list = NULL; 336 rc->active = 0; 337 rc->worker = NULL; 338 } 339 340 void daemon_remote_delete(struct daemon_remote* rc) 341 { 342 if(!rc) return; 343 daemon_remote_clear(rc); 344 if(rc->ctx) { 345 SSL_CTX_free(rc->ctx); 346 } 347 free(rc); 348 } 349 350 /** 351 * Add and open a new control port 352 * @param ip: ip str 353 * @param nr: port nr 354 * @param list: list head 355 * @param noproto_is_err: if lack of protocol support is an error. 356 * @param cfg: config with username for chown of unix-sockets. 357 * @return false on failure. 358 */ 359 static int 360 add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err, 361 struct config_file* cfg) 362 { 363 struct addrinfo hints; 364 struct addrinfo* res; 365 struct listen_port* n; 366 int noproto; 367 int fd, r; 368 char port[15]; 369 snprintf(port, sizeof(port), "%d", nr); 370 port[sizeof(port)-1]=0; 371 memset(&hints, 0, sizeof(hints)); 372 373 if(ip[0] == '/') { 374 /* This looks like a local socket */ 375 fd = create_local_accept_sock(ip, &noproto); 376 /* 377 * Change socket ownership and permissions so users other 378 * than root can access it provided they are in the same 379 * group as the user we run as. 380 */ 381 if(fd != -1) { 382 #ifdef HAVE_CHOWN 383 if (cfg->username && cfg->username[0] && 384 cfg_uid != (uid_t)-1) { 385 if(chown(ip, cfg_uid, cfg_gid) == -1) 386 log_err("cannot chown %u.%u %s: %s", 387 (unsigned)cfg_uid, (unsigned)cfg_gid, 388 ip, strerror(errno)); 389 } 390 chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP)); 391 #else 392 (void)cfg; 393 #endif 394 } 395 } else { 396 hints.ai_socktype = SOCK_STREAM; 397 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST; 398 if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) { 399 #ifdef USE_WINSOCK 400 if(!noproto_is_err && r == EAI_NONAME) { 401 /* tried to lookup the address as name */ 402 return 1; /* return success, but do nothing */ 403 } 404 #endif /* USE_WINSOCK */ 405 log_err("control interface %s:%s getaddrinfo: %s %s", 406 ip?ip:"default", port, gai_strerror(r), 407 #ifdef EAI_SYSTEM 408 r==EAI_SYSTEM?(char*)strerror(errno):"" 409 #else 410 "" 411 #endif 412 ); 413 return 0; 414 } 415 416 /* open fd */ 417 fd = create_tcp_accept_sock(res, 1, &noproto, 0, 418 cfg->ip_transparent, 0, cfg->ip_freebind); 419 freeaddrinfo(res); 420 } 421 422 if(fd == -1 && noproto) { 423 if(!noproto_is_err) 424 return 1; /* return success, but do nothing */ 425 log_err("cannot open control interface %s %d : " 426 "protocol not supported", ip, nr); 427 return 0; 428 } 429 if(fd == -1) { 430 log_err("cannot open control interface %s %d", ip, nr); 431 return 0; 432 } 433 434 /* alloc */ 435 n = (struct listen_port*)calloc(1, sizeof(*n)); 436 if(!n) { 437 #ifndef USE_WINSOCK 438 close(fd); 439 #else 440 closesocket(fd); 441 #endif 442 log_err("out of memory"); 443 return 0; 444 } 445 n->next = *list; 446 *list = n; 447 n->fd = fd; 448 return 1; 449 } 450 451 struct listen_port* daemon_remote_open_ports(struct config_file* cfg) 452 { 453 struct listen_port* l = NULL; 454 log_assert(cfg->remote_control_enable && cfg->control_port); 455 if(cfg->control_ifs) { 456 struct config_strlist* p; 457 for(p = cfg->control_ifs; p; p = p->next) { 458 if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) { 459 listening_ports_free(l); 460 return NULL; 461 } 462 } 463 } else { 464 /* defaults */ 465 if(cfg->do_ip6 && 466 !add_open("::1", cfg->control_port, &l, 0, cfg)) { 467 listening_ports_free(l); 468 return NULL; 469 } 470 if(cfg->do_ip4 && 471 !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) { 472 listening_ports_free(l); 473 return NULL; 474 } 475 } 476 return l; 477 } 478 479 /** open accept commpoint */ 480 static int 481 accept_open(struct daemon_remote* rc, int fd) 482 { 483 struct listen_list* n = (struct listen_list*)malloc(sizeof(*n)); 484 if(!n) { 485 log_err("out of memory"); 486 return 0; 487 } 488 n->next = rc->accept_list; 489 rc->accept_list = n; 490 /* open commpt */ 491 n->com = comm_point_create_raw(rc->worker->base, fd, 0, 492 &remote_accept_callback, rc); 493 if(!n->com) 494 return 0; 495 /* keep this port open, its fd is kept in the rc portlist */ 496 n->com->do_not_close = 1; 497 return 1; 498 } 499 500 int daemon_remote_open_accept(struct daemon_remote* rc, 501 struct listen_port* ports, struct worker* worker) 502 { 503 struct listen_port* p; 504 rc->worker = worker; 505 for(p = ports; p; p = p->next) { 506 if(!accept_open(rc, p->fd)) { 507 log_err("could not create accept comm point"); 508 return 0; 509 } 510 } 511 return 1; 512 } 513 514 void daemon_remote_stop_accept(struct daemon_remote* rc) 515 { 516 struct listen_list* p; 517 for(p=rc->accept_list; p; p=p->next) { 518 comm_point_stop_listening(p->com); 519 } 520 } 521 522 void daemon_remote_start_accept(struct daemon_remote* rc) 523 { 524 struct listen_list* p; 525 for(p=rc->accept_list; p; p=p->next) { 526 comm_point_start_listening(p->com, -1, -1); 527 } 528 } 529 530 int remote_accept_callback(struct comm_point* c, void* arg, int err, 531 struct comm_reply* ATTR_UNUSED(rep)) 532 { 533 struct daemon_remote* rc = (struct daemon_remote*)arg; 534 struct sockaddr_storage addr; 535 socklen_t addrlen; 536 int newfd; 537 struct rc_state* n; 538 if(err != NETEVENT_NOERROR) { 539 log_err("error %d on remote_accept_callback", err); 540 return 0; 541 } 542 /* perform the accept */ 543 newfd = comm_point_perform_accept(c, &addr, &addrlen); 544 if(newfd == -1) 545 return 0; 546 /* create new commpoint unless we are servicing already */ 547 if(rc->active >= rc->max_active) { 548 log_warn("drop incoming remote control: too many connections"); 549 close_exit: 550 #ifndef USE_WINSOCK 551 close(newfd); 552 #else 553 closesocket(newfd); 554 #endif 555 return 0; 556 } 557 558 /* setup commpoint to service the remote control command */ 559 n = (struct rc_state*)calloc(1, sizeof(*n)); 560 if(!n) { 561 log_err("out of memory"); 562 goto close_exit; 563 } 564 /* start in reading state */ 565 n->c = comm_point_create_raw(rc->worker->base, newfd, 0, 566 &remote_control_callback, n); 567 if(!n->c) { 568 log_err("out of memory"); 569 free(n); 570 goto close_exit; 571 } 572 log_addr(VERB_QUERY, "new control connection from", &addr, addrlen); 573 n->c->do_not_close = 0; 574 comm_point_stop_listening(n->c); 575 comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT); 576 memcpy(&n->c->repinfo.addr, &addr, addrlen); 577 n->c->repinfo.addrlen = addrlen; 578 n->shake_state = rc_hs_read; 579 n->ssl = SSL_new(rc->ctx); 580 if(!n->ssl) { 581 log_crypto_err("could not SSL_new"); 582 comm_point_delete(n->c); 583 free(n); 584 goto close_exit; 585 } 586 SSL_set_accept_state(n->ssl); 587 (void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY); 588 if(!SSL_set_fd(n->ssl, newfd)) { 589 log_crypto_err("could not SSL_set_fd"); 590 SSL_free(n->ssl); 591 comm_point_delete(n->c); 592 free(n); 593 goto close_exit; 594 } 595 596 n->rc = rc; 597 n->next = rc->busy_list; 598 rc->busy_list = n; 599 rc->active ++; 600 601 /* perform the first nonblocking read already, for windows, 602 * so it can return wouldblock. could be faster too. */ 603 (void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL); 604 return 0; 605 } 606 607 /** delete from list */ 608 static void 609 state_list_remove_elem(struct rc_state** list, struct comm_point* c) 610 { 611 while(*list) { 612 if( (*list)->c == c) { 613 *list = (*list)->next; 614 return; 615 } 616 list = &(*list)->next; 617 } 618 } 619 620 /** decrease active count and remove commpoint from busy list */ 621 static void 622 clean_point(struct daemon_remote* rc, struct rc_state* s) 623 { 624 state_list_remove_elem(&rc->busy_list, s->c); 625 rc->active --; 626 if(s->ssl) { 627 SSL_shutdown(s->ssl); 628 SSL_free(s->ssl); 629 } 630 comm_point_delete(s->c); 631 free(s); 632 } 633 634 int 635 ssl_print_text(SSL* ssl, const char* text) 636 { 637 int r; 638 if(!ssl) 639 return 0; 640 ERR_clear_error(); 641 if((r=SSL_write(ssl, text, (int)strlen(text))) <= 0) { 642 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 643 verbose(VERB_QUERY, "warning, in SSL_write, peer " 644 "closed connection"); 645 return 0; 646 } 647 log_crypto_err("could not SSL_write"); 648 return 0; 649 } 650 return 1; 651 } 652 653 /** print text over the ssl connection */ 654 static int 655 ssl_print_vmsg(SSL* ssl, const char* format, va_list args) 656 { 657 char msg[1024]; 658 vsnprintf(msg, sizeof(msg), format, args); 659 return ssl_print_text(ssl, msg); 660 } 661 662 /** printf style printing to the ssl connection */ 663 int ssl_printf(SSL* ssl, const char* format, ...) 664 { 665 va_list args; 666 int ret; 667 va_start(args, format); 668 ret = ssl_print_vmsg(ssl, format, args); 669 va_end(args); 670 return ret; 671 } 672 673 int 674 ssl_read_line(SSL* ssl, char* buf, size_t max) 675 { 676 int r; 677 size_t len = 0; 678 if(!ssl) 679 return 0; 680 while(len < max) { 681 ERR_clear_error(); 682 if((r=SSL_read(ssl, buf+len, 1)) <= 0) { 683 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) { 684 buf[len] = 0; 685 return 1; 686 } 687 log_crypto_err("could not SSL_read"); 688 return 0; 689 } 690 if(buf[len] == '\n') { 691 /* return string without \n */ 692 buf[len] = 0; 693 return 1; 694 } 695 len++; 696 } 697 buf[max-1] = 0; 698 log_err("control line too long (%d): %s", (int)max, buf); 699 return 0; 700 } 701 702 /** skip whitespace, return new pointer into string */ 703 static char* 704 skipwhite(char* str) 705 { 706 /* EOS \0 is not a space */ 707 while( isspace((unsigned char)*str) ) 708 str++; 709 return str; 710 } 711 712 /** send the OK to the control client */ 713 static void send_ok(SSL* ssl) 714 { 715 (void)ssl_printf(ssl, "ok\n"); 716 } 717 718 /** do the stop command */ 719 static void 720 do_stop(SSL* ssl, struct daemon_remote* rc) 721 { 722 rc->worker->need_to_exit = 1; 723 comm_base_exit(rc->worker->base); 724 send_ok(ssl); 725 } 726 727 /** do the reload command */ 728 static void 729 do_reload(SSL* ssl, struct daemon_remote* rc) 730 { 731 rc->worker->need_to_exit = 0; 732 comm_base_exit(rc->worker->base); 733 send_ok(ssl); 734 } 735 736 /** do the verbosity command */ 737 static void 738 do_verbosity(SSL* ssl, char* str) 739 { 740 int val = atoi(str); 741 if(val == 0 && strcmp(str, "0") != 0) { 742 ssl_printf(ssl, "error in verbosity number syntax: %s\n", str); 743 return; 744 } 745 verbosity = val; 746 send_ok(ssl); 747 } 748 749 /** print stats from statinfo */ 750 static int 751 print_stats(SSL* ssl, const char* nm, struct stats_info* s) 752 { 753 struct timeval avg; 754 if(!ssl_printf(ssl, "%s.num.queries"SQ"%lu\n", nm, 755 (unsigned long)s->svr.num_queries)) return 0; 756 if(!ssl_printf(ssl, "%s.num.cachehits"SQ"%lu\n", nm, 757 (unsigned long)(s->svr.num_queries 758 - s->svr.num_queries_missed_cache))) return 0; 759 if(!ssl_printf(ssl, "%s.num.cachemiss"SQ"%lu\n", nm, 760 (unsigned long)s->svr.num_queries_missed_cache)) return 0; 761 if(!ssl_printf(ssl, "%s.num.prefetch"SQ"%lu\n", nm, 762 (unsigned long)s->svr.num_queries_prefetch)) return 0; 763 if(!ssl_printf(ssl, "%s.num.recursivereplies"SQ"%lu\n", nm, 764 (unsigned long)s->mesh_replies_sent)) return 0; 765 if(!ssl_printf(ssl, "%s.requestlist.avg"SQ"%g\n", nm, 766 (s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)? 767 (double)s->svr.sum_query_list_size/ 768 (s->svr.num_queries_missed_cache+ 769 s->svr.num_queries_prefetch) : 0.0)) return 0; 770 if(!ssl_printf(ssl, "%s.requestlist.max"SQ"%lu\n", nm, 771 (unsigned long)s->svr.max_query_list_size)) return 0; 772 if(!ssl_printf(ssl, "%s.requestlist.overwritten"SQ"%lu\n", nm, 773 (unsigned long)s->mesh_jostled)) return 0; 774 if(!ssl_printf(ssl, "%s.requestlist.exceeded"SQ"%lu\n", nm, 775 (unsigned long)s->mesh_dropped)) return 0; 776 if(!ssl_printf(ssl, "%s.requestlist.current.all"SQ"%lu\n", nm, 777 (unsigned long)s->mesh_num_states)) return 0; 778 if(!ssl_printf(ssl, "%s.requestlist.current.user"SQ"%lu\n", nm, 779 (unsigned long)s->mesh_num_reply_states)) return 0; 780 timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent); 781 if(!ssl_printf(ssl, "%s.recursion.time.avg"SQ ARG_LL "d.%6.6d\n", nm, 782 (long long)avg.tv_sec, (int)avg.tv_usec)) return 0; 783 if(!ssl_printf(ssl, "%s.recursion.time.median"SQ"%g\n", nm, 784 s->mesh_time_median)) return 0; 785 if(!ssl_printf(ssl, "%s.tcpusage"SQ"%lu\n", nm, 786 (unsigned long)s->svr.tcp_accept_usage)) return 0; 787 return 1; 788 } 789 790 /** print stats for one thread */ 791 static int 792 print_thread_stats(SSL* ssl, int i, struct stats_info* s) 793 { 794 char nm[16]; 795 snprintf(nm, sizeof(nm), "thread%d", i); 796 nm[sizeof(nm)-1]=0; 797 return print_stats(ssl, nm, s); 798 } 799 800 /** print long number */ 801 static int 802 print_longnum(SSL* ssl, const char* desc, size_t x) 803 { 804 if(x > 1024*1024*1024) { 805 /* more than a Gb */ 806 size_t front = x / (size_t)1000000; 807 size_t back = x % (size_t)1000000; 808 return ssl_printf(ssl, "%s%u%6.6u\n", desc, 809 (unsigned)front, (unsigned)back); 810 } else { 811 return ssl_printf(ssl, "%s%lu\n", desc, (unsigned long)x); 812 } 813 } 814 815 /** print mem stats */ 816 static int 817 print_mem(SSL* ssl, struct worker* worker, struct daemon* daemon) 818 { 819 int m; 820 size_t msg, rrset, val, iter; 821 #ifdef HAVE_SBRK 822 extern void* unbound_start_brk; 823 void* cur = sbrk(0); 824 if(!print_longnum(ssl, "mem.total.sbrk"SQ, 825 (size_t)((char*)cur - (char*)unbound_start_brk))) return 0; 826 #endif /* HAVE_SBRK */ 827 msg = slabhash_get_mem(daemon->env->msg_cache); 828 rrset = slabhash_get_mem(&daemon->env->rrset_cache->table); 829 val=0; 830 iter=0; 831 m = modstack_find(&worker->env.mesh->mods, "validator"); 832 if(m != -1) { 833 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh-> 834 mods.mod[m]->get_mem)); 835 val = (*worker->env.mesh->mods.mod[m]->get_mem) 836 (&worker->env, m); 837 } 838 m = modstack_find(&worker->env.mesh->mods, "iterator"); 839 if(m != -1) { 840 fptr_ok(fptr_whitelist_mod_get_mem(worker->env.mesh-> 841 mods.mod[m]->get_mem)); 842 iter = (*worker->env.mesh->mods.mod[m]->get_mem) 843 (&worker->env, m); 844 } 845 846 if(!print_longnum(ssl, "mem.cache.rrset"SQ, rrset)) 847 return 0; 848 if(!print_longnum(ssl, "mem.cache.message"SQ, msg)) 849 return 0; 850 if(!print_longnum(ssl, "mem.mod.iterator"SQ, iter)) 851 return 0; 852 if(!print_longnum(ssl, "mem.mod.validator"SQ, val)) 853 return 0; 854 return 1; 855 } 856 857 /** print uptime stats */ 858 static int 859 print_uptime(SSL* ssl, struct worker* worker, int reset) 860 { 861 struct timeval now = *worker->env.now_tv; 862 struct timeval up, dt; 863 timeval_subtract(&up, &now, &worker->daemon->time_boot); 864 timeval_subtract(&dt, &now, &worker->daemon->time_last_stat); 865 if(reset) 866 worker->daemon->time_last_stat = now; 867 if(!ssl_printf(ssl, "time.now"SQ ARG_LL "d.%6.6d\n", 868 (long long)now.tv_sec, (unsigned)now.tv_usec)) return 0; 869 if(!ssl_printf(ssl, "time.up"SQ ARG_LL "d.%6.6d\n", 870 (long long)up.tv_sec, (unsigned)up.tv_usec)) return 0; 871 if(!ssl_printf(ssl, "time.elapsed"SQ ARG_LL "d.%6.6d\n", 872 (long long)dt.tv_sec, (unsigned)dt.tv_usec)) return 0; 873 return 1; 874 } 875 876 /** print extended histogram */ 877 static int 878 print_hist(SSL* ssl, struct stats_info* s) 879 { 880 struct timehist* hist; 881 size_t i; 882 hist = timehist_setup(); 883 if(!hist) { 884 log_err("out of memory"); 885 return 0; 886 } 887 timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST); 888 for(i=0; i<hist->num; i++) { 889 if(!ssl_printf(ssl, 890 "histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n", 891 (int)hist->buckets[i].lower.tv_sec, 892 (int)hist->buckets[i].lower.tv_usec, 893 (int)hist->buckets[i].upper.tv_sec, 894 (int)hist->buckets[i].upper.tv_usec, 895 (unsigned long)hist->buckets[i].count)) { 896 timehist_delete(hist); 897 return 0; 898 } 899 } 900 timehist_delete(hist); 901 return 1; 902 } 903 904 /** print extended stats */ 905 static int 906 print_ext(SSL* ssl, struct stats_info* s) 907 { 908 int i; 909 char nm[16]; 910 const sldns_rr_descriptor* desc; 911 const sldns_lookup_table* lt; 912 /* TYPE */ 913 for(i=0; i<STATS_QTYPE_NUM; i++) { 914 if(inhibit_zero && s->svr.qtype[i] == 0) 915 continue; 916 desc = sldns_rr_descript((uint16_t)i); 917 if(desc && desc->_name) { 918 snprintf(nm, sizeof(nm), "%s", desc->_name); 919 } else if (i == LDNS_RR_TYPE_IXFR) { 920 snprintf(nm, sizeof(nm), "IXFR"); 921 } else if (i == LDNS_RR_TYPE_AXFR) { 922 snprintf(nm, sizeof(nm), "AXFR"); 923 } else if (i == LDNS_RR_TYPE_MAILA) { 924 snprintf(nm, sizeof(nm), "MAILA"); 925 } else if (i == LDNS_RR_TYPE_MAILB) { 926 snprintf(nm, sizeof(nm), "MAILB"); 927 } else if (i == LDNS_RR_TYPE_ANY) { 928 snprintf(nm, sizeof(nm), "ANY"); 929 } else { 930 snprintf(nm, sizeof(nm), "TYPE%d", i); 931 } 932 if(!ssl_printf(ssl, "num.query.type.%s"SQ"%lu\n", 933 nm, (unsigned long)s->svr.qtype[i])) return 0; 934 } 935 if(!inhibit_zero || s->svr.qtype_big) { 936 if(!ssl_printf(ssl, "num.query.type.other"SQ"%lu\n", 937 (unsigned long)s->svr.qtype_big)) return 0; 938 } 939 /* CLASS */ 940 for(i=0; i<STATS_QCLASS_NUM; i++) { 941 if(inhibit_zero && s->svr.qclass[i] == 0) 942 continue; 943 lt = sldns_lookup_by_id(sldns_rr_classes, i); 944 if(lt && lt->name) { 945 snprintf(nm, sizeof(nm), "%s", lt->name); 946 } else { 947 snprintf(nm, sizeof(nm), "CLASS%d", i); 948 } 949 if(!ssl_printf(ssl, "num.query.class.%s"SQ"%lu\n", 950 nm, (unsigned long)s->svr.qclass[i])) return 0; 951 } 952 if(!inhibit_zero || s->svr.qclass_big) { 953 if(!ssl_printf(ssl, "num.query.class.other"SQ"%lu\n", 954 (unsigned long)s->svr.qclass_big)) return 0; 955 } 956 /* OPCODE */ 957 for(i=0; i<STATS_OPCODE_NUM; i++) { 958 if(inhibit_zero && s->svr.qopcode[i] == 0) 959 continue; 960 lt = sldns_lookup_by_id(sldns_opcodes, i); 961 if(lt && lt->name) { 962 snprintf(nm, sizeof(nm), "%s", lt->name); 963 } else { 964 snprintf(nm, sizeof(nm), "OPCODE%d", i); 965 } 966 if(!ssl_printf(ssl, "num.query.opcode.%s"SQ"%lu\n", 967 nm, (unsigned long)s->svr.qopcode[i])) return 0; 968 } 969 /* transport */ 970 if(!ssl_printf(ssl, "num.query.tcp"SQ"%lu\n", 971 (unsigned long)s->svr.qtcp)) return 0; 972 if(!ssl_printf(ssl, "num.query.tcpout"SQ"%lu\n", 973 (unsigned long)s->svr.qtcp_outgoing)) return 0; 974 if(!ssl_printf(ssl, "num.query.ipv6"SQ"%lu\n", 975 (unsigned long)s->svr.qipv6)) return 0; 976 /* flags */ 977 if(!ssl_printf(ssl, "num.query.flags.QR"SQ"%lu\n", 978 (unsigned long)s->svr.qbit_QR)) return 0; 979 if(!ssl_printf(ssl, "num.query.flags.AA"SQ"%lu\n", 980 (unsigned long)s->svr.qbit_AA)) return 0; 981 if(!ssl_printf(ssl, "num.query.flags.TC"SQ"%lu\n", 982 (unsigned long)s->svr.qbit_TC)) return 0; 983 if(!ssl_printf(ssl, "num.query.flags.RD"SQ"%lu\n", 984 (unsigned long)s->svr.qbit_RD)) return 0; 985 if(!ssl_printf(ssl, "num.query.flags.RA"SQ"%lu\n", 986 (unsigned long)s->svr.qbit_RA)) return 0; 987 if(!ssl_printf(ssl, "num.query.flags.Z"SQ"%lu\n", 988 (unsigned long)s->svr.qbit_Z)) return 0; 989 if(!ssl_printf(ssl, "num.query.flags.AD"SQ"%lu\n", 990 (unsigned long)s->svr.qbit_AD)) return 0; 991 if(!ssl_printf(ssl, "num.query.flags.CD"SQ"%lu\n", 992 (unsigned long)s->svr.qbit_CD)) return 0; 993 if(!ssl_printf(ssl, "num.query.edns.present"SQ"%lu\n", 994 (unsigned long)s->svr.qEDNS)) return 0; 995 if(!ssl_printf(ssl, "num.query.edns.DO"SQ"%lu\n", 996 (unsigned long)s->svr.qEDNS_DO)) return 0; 997 998 /* RCODE */ 999 for(i=0; i<STATS_RCODE_NUM; i++) { 1000 /* Always include RCODEs 0-5 */ 1001 if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0) 1002 continue; 1003 lt = sldns_lookup_by_id(sldns_rcodes, i); 1004 if(lt && lt->name) { 1005 snprintf(nm, sizeof(nm), "%s", lt->name); 1006 } else { 1007 snprintf(nm, sizeof(nm), "RCODE%d", i); 1008 } 1009 if(!ssl_printf(ssl, "num.answer.rcode.%s"SQ"%lu\n", 1010 nm, (unsigned long)s->svr.ans_rcode[i])) return 0; 1011 } 1012 if(!inhibit_zero || s->svr.ans_rcode_nodata) { 1013 if(!ssl_printf(ssl, "num.answer.rcode.nodata"SQ"%lu\n", 1014 (unsigned long)s->svr.ans_rcode_nodata)) return 0; 1015 } 1016 /* validation */ 1017 if(!ssl_printf(ssl, "num.answer.secure"SQ"%lu\n", 1018 (unsigned long)s->svr.ans_secure)) return 0; 1019 if(!ssl_printf(ssl, "num.answer.bogus"SQ"%lu\n", 1020 (unsigned long)s->svr.ans_bogus)) return 0; 1021 if(!ssl_printf(ssl, "num.rrset.bogus"SQ"%lu\n", 1022 (unsigned long)s->svr.rrset_bogus)) return 0; 1023 /* threat detection */ 1024 if(!ssl_printf(ssl, "unwanted.queries"SQ"%lu\n", 1025 (unsigned long)s->svr.unwanted_queries)) return 0; 1026 if(!ssl_printf(ssl, "unwanted.replies"SQ"%lu\n", 1027 (unsigned long)s->svr.unwanted_replies)) return 0; 1028 /* cache counts */ 1029 if(!ssl_printf(ssl, "msg.cache.count"SQ"%u\n", 1030 (unsigned)s->svr.msg_cache_count)) return 0; 1031 if(!ssl_printf(ssl, "rrset.cache.count"SQ"%u\n", 1032 (unsigned)s->svr.rrset_cache_count)) return 0; 1033 if(!ssl_printf(ssl, "infra.cache.count"SQ"%u\n", 1034 (unsigned)s->svr.infra_cache_count)) return 0; 1035 if(!ssl_printf(ssl, "key.cache.count"SQ"%u\n", 1036 (unsigned)s->svr.key_cache_count)) return 0; 1037 return 1; 1038 } 1039 1040 /** do the stats command */ 1041 static void 1042 do_stats(SSL* ssl, struct daemon_remote* rc, int reset) 1043 { 1044 struct daemon* daemon = rc->worker->daemon; 1045 struct stats_info total; 1046 struct stats_info s; 1047 int i; 1048 log_assert(daemon->num > 0); 1049 /* gather all thread statistics in one place */ 1050 for(i=0; i<daemon->num; i++) { 1051 server_stats_obtain(rc->worker, daemon->workers[i], &s, reset); 1052 if(!print_thread_stats(ssl, i, &s)) 1053 return; 1054 if(i == 0) 1055 total = s; 1056 else server_stats_add(&total, &s); 1057 } 1058 /* print the thread statistics */ 1059 total.mesh_time_median /= (double)daemon->num; 1060 if(!print_stats(ssl, "total", &total)) 1061 return; 1062 if(!print_uptime(ssl, rc->worker, reset)) 1063 return; 1064 if(daemon->cfg->stat_extended) { 1065 if(!print_mem(ssl, rc->worker, daemon)) 1066 return; 1067 if(!print_hist(ssl, &total)) 1068 return; 1069 if(!print_ext(ssl, &total)) 1070 return; 1071 } 1072 } 1073 1074 /** parse commandline argument domain name */ 1075 static int 1076 parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs) 1077 { 1078 uint8_t nm[LDNS_MAX_DOMAINLEN+1]; 1079 size_t nmlen = sizeof(nm); 1080 int status; 1081 *res = NULL; 1082 *len = 0; 1083 *labs = 0; 1084 status = sldns_str2wire_dname_buf(str, nm, &nmlen); 1085 if(status != 0) { 1086 ssl_printf(ssl, "error cannot parse name %s at %d: %s\n", str, 1087 LDNS_WIREPARSE_OFFSET(status), 1088 sldns_get_errorstr_parse(status)); 1089 return 0; 1090 } 1091 *res = memdup(nm, nmlen); 1092 if(!*res) { 1093 ssl_printf(ssl, "error out of memory\n"); 1094 return 0; 1095 } 1096 *labs = dname_count_size_labels(*res, len); 1097 return 1; 1098 } 1099 1100 /** find second argument, modifies string */ 1101 static int 1102 find_arg2(SSL* ssl, char* arg, char** arg2) 1103 { 1104 char* as = strchr(arg, ' '); 1105 char* at = strchr(arg, '\t'); 1106 if(as && at) { 1107 if(at < as) 1108 as = at; 1109 as[0]=0; 1110 *arg2 = skipwhite(as+1); 1111 } else if(as) { 1112 as[0]=0; 1113 *arg2 = skipwhite(as+1); 1114 } else if(at) { 1115 at[0]=0; 1116 *arg2 = skipwhite(at+1); 1117 } else { 1118 ssl_printf(ssl, "error could not find next argument " 1119 "after %s\n", arg); 1120 return 0; 1121 } 1122 return 1; 1123 } 1124 1125 /** Add a new zone */ 1126 static void 1127 do_zone_add(SSL* ssl, struct worker* worker, char* arg) 1128 { 1129 uint8_t* nm; 1130 int nmlabs; 1131 size_t nmlen; 1132 char* arg2; 1133 enum localzone_type t; 1134 struct local_zone* z; 1135 if(!find_arg2(ssl, arg, &arg2)) 1136 return; 1137 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1138 return; 1139 if(!local_zone_str2type(arg2, &t)) { 1140 ssl_printf(ssl, "error not a zone type. %s\n", arg2); 1141 free(nm); 1142 return; 1143 } 1144 lock_rw_wrlock(&worker->daemon->local_zones->lock); 1145 if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen, 1146 nmlabs, LDNS_RR_CLASS_IN))) { 1147 /* already present in tree */ 1148 lock_rw_wrlock(&z->lock); 1149 z->type = t; /* update type anyway */ 1150 lock_rw_unlock(&z->lock); 1151 free(nm); 1152 lock_rw_unlock(&worker->daemon->local_zones->lock); 1153 send_ok(ssl); 1154 return; 1155 } 1156 if(!local_zones_add_zone(worker->daemon->local_zones, nm, nmlen, 1157 nmlabs, LDNS_RR_CLASS_IN, t)) { 1158 lock_rw_unlock(&worker->daemon->local_zones->lock); 1159 ssl_printf(ssl, "error out of memory\n"); 1160 return; 1161 } 1162 lock_rw_unlock(&worker->daemon->local_zones->lock); 1163 send_ok(ssl); 1164 } 1165 1166 /** Remove a zone */ 1167 static void 1168 do_zone_remove(SSL* ssl, struct worker* worker, char* arg) 1169 { 1170 uint8_t* nm; 1171 int nmlabs; 1172 size_t nmlen; 1173 struct local_zone* z; 1174 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1175 return; 1176 lock_rw_wrlock(&worker->daemon->local_zones->lock); 1177 if((z=local_zones_find(worker->daemon->local_zones, nm, nmlen, 1178 nmlabs, LDNS_RR_CLASS_IN))) { 1179 /* present in tree */ 1180 local_zones_del_zone(worker->daemon->local_zones, z); 1181 } 1182 lock_rw_unlock(&worker->daemon->local_zones->lock); 1183 free(nm); 1184 send_ok(ssl); 1185 } 1186 1187 /** Add new RR data */ 1188 static void 1189 do_data_add(SSL* ssl, struct worker* worker, char* arg) 1190 { 1191 if(!local_zones_add_RR(worker->daemon->local_zones, arg)) { 1192 ssl_printf(ssl,"error in syntax or out of memory, %s\n", arg); 1193 return; 1194 } 1195 send_ok(ssl); 1196 } 1197 1198 /** Remove RR data */ 1199 static void 1200 do_data_remove(SSL* ssl, struct worker* worker, char* arg) 1201 { 1202 uint8_t* nm; 1203 int nmlabs; 1204 size_t nmlen; 1205 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1206 return; 1207 local_zones_del_data(worker->daemon->local_zones, nm, 1208 nmlen, nmlabs, LDNS_RR_CLASS_IN); 1209 free(nm); 1210 send_ok(ssl); 1211 } 1212 1213 /** cache lookup of nameservers */ 1214 static void 1215 do_lookup(SSL* ssl, struct worker* worker, char* arg) 1216 { 1217 uint8_t* nm; 1218 int nmlabs; 1219 size_t nmlen; 1220 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1221 return; 1222 (void)print_deleg_lookup(ssl, worker, nm, nmlen, nmlabs); 1223 free(nm); 1224 } 1225 1226 /** flush something from rrset and msg caches */ 1227 static void 1228 do_cache_remove(struct worker* worker, uint8_t* nm, size_t nmlen, 1229 uint16_t t, uint16_t c) 1230 { 1231 hashvalue_t h; 1232 struct query_info k; 1233 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 0); 1234 if(t == LDNS_RR_TYPE_SOA) 1235 rrset_cache_remove(worker->env.rrset_cache, nm, nmlen, t, c, 1236 PACKED_RRSET_SOA_NEG); 1237 k.qname = nm; 1238 k.qname_len = nmlen; 1239 k.qtype = t; 1240 k.qclass = c; 1241 h = query_info_hash(&k, 0); 1242 slabhash_remove(worker->env.msg_cache, h, &k); 1243 if(t == LDNS_RR_TYPE_AAAA) { 1244 /* for AAAA also flush dns64 bit_cd packet */ 1245 h = query_info_hash(&k, BIT_CD); 1246 slabhash_remove(worker->env.msg_cache, h, &k); 1247 } 1248 } 1249 1250 /** flush a type */ 1251 static void 1252 do_flush_type(SSL* ssl, struct worker* worker, char* arg) 1253 { 1254 uint8_t* nm; 1255 int nmlabs; 1256 size_t nmlen; 1257 char* arg2; 1258 uint16_t t; 1259 if(!find_arg2(ssl, arg, &arg2)) 1260 return; 1261 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1262 return; 1263 t = sldns_get_rr_type_by_name(arg2); 1264 do_cache_remove(worker, nm, nmlen, t, LDNS_RR_CLASS_IN); 1265 1266 free(nm); 1267 send_ok(ssl); 1268 } 1269 1270 /** flush statistics */ 1271 static void 1272 do_flush_stats(SSL* ssl, struct worker* worker) 1273 { 1274 worker_stats_clear(worker); 1275 send_ok(ssl); 1276 } 1277 1278 /** 1279 * Local info for deletion functions 1280 */ 1281 struct del_info { 1282 /** worker */ 1283 struct worker* worker; 1284 /** name to delete */ 1285 uint8_t* name; 1286 /** length */ 1287 size_t len; 1288 /** labels */ 1289 int labs; 1290 /** time to invalidate to */ 1291 time_t expired; 1292 /** number of rrsets removed */ 1293 size_t num_rrsets; 1294 /** number of msgs removed */ 1295 size_t num_msgs; 1296 /** number of key entries removed */ 1297 size_t num_keys; 1298 /** length of addr */ 1299 socklen_t addrlen; 1300 /** socket address for host deletion */ 1301 struct sockaddr_storage addr; 1302 }; 1303 1304 /** callback to delete hosts in infra cache */ 1305 static void 1306 infra_del_host(struct lruhash_entry* e, void* arg) 1307 { 1308 /* entry is locked */ 1309 struct del_info* inf = (struct del_info*)arg; 1310 struct infra_key* k = (struct infra_key*)e->key; 1311 if(sockaddr_cmp(&inf->addr, inf->addrlen, &k->addr, k->addrlen) == 0) { 1312 struct infra_data* d = (struct infra_data*)e->data; 1313 d->probedelay = 0; 1314 d->timeout_A = 0; 1315 d->timeout_AAAA = 0; 1316 d->timeout_other = 0; 1317 rtt_init(&d->rtt); 1318 if(d->ttl > inf->expired) { 1319 d->ttl = inf->expired; 1320 inf->num_keys++; 1321 } 1322 } 1323 } 1324 1325 /** flush infra cache */ 1326 static void 1327 do_flush_infra(SSL* ssl, struct worker* worker, char* arg) 1328 { 1329 struct sockaddr_storage addr; 1330 socklen_t len; 1331 struct del_info inf; 1332 if(strcmp(arg, "all") == 0) { 1333 slabhash_clear(worker->env.infra_cache->hosts); 1334 send_ok(ssl); 1335 return; 1336 } 1337 if(!ipstrtoaddr(arg, UNBOUND_DNS_PORT, &addr, &len)) { 1338 (void)ssl_printf(ssl, "error parsing ip addr: '%s'\n", arg); 1339 return; 1340 } 1341 /* delete all entries from cache */ 1342 /* what we do is to set them all expired */ 1343 inf.worker = worker; 1344 inf.name = 0; 1345 inf.len = 0; 1346 inf.labs = 0; 1347 inf.expired = *worker->env.now; 1348 inf.expired -= 3; /* handle 3 seconds skew between threads */ 1349 inf.num_rrsets = 0; 1350 inf.num_msgs = 0; 1351 inf.num_keys = 0; 1352 inf.addrlen = len; 1353 memmove(&inf.addr, &addr, len); 1354 slabhash_traverse(worker->env.infra_cache->hosts, 1, &infra_del_host, 1355 &inf); 1356 send_ok(ssl); 1357 } 1358 1359 /** flush requestlist */ 1360 static void 1361 do_flush_requestlist(SSL* ssl, struct worker* worker) 1362 { 1363 mesh_delete_all(worker->env.mesh); 1364 send_ok(ssl); 1365 } 1366 1367 /** callback to delete rrsets in a zone */ 1368 static void 1369 zone_del_rrset(struct lruhash_entry* e, void* arg) 1370 { 1371 /* entry is locked */ 1372 struct del_info* inf = (struct del_info*)arg; 1373 struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key; 1374 if(dname_subdomain_c(k->rk.dname, inf->name)) { 1375 struct packed_rrset_data* d = 1376 (struct packed_rrset_data*)e->data; 1377 if(d->ttl > inf->expired) { 1378 d->ttl = inf->expired; 1379 inf->num_rrsets++; 1380 } 1381 } 1382 } 1383 1384 /** callback to delete messages in a zone */ 1385 static void 1386 zone_del_msg(struct lruhash_entry* e, void* arg) 1387 { 1388 /* entry is locked */ 1389 struct del_info* inf = (struct del_info*)arg; 1390 struct msgreply_entry* k = (struct msgreply_entry*)e->key; 1391 if(dname_subdomain_c(k->key.qname, inf->name)) { 1392 struct reply_info* d = (struct reply_info*)e->data; 1393 if(d->ttl > inf->expired) { 1394 d->ttl = inf->expired; 1395 inf->num_msgs++; 1396 } 1397 } 1398 } 1399 1400 /** callback to delete keys in zone */ 1401 static void 1402 zone_del_kcache(struct lruhash_entry* e, void* arg) 1403 { 1404 /* entry is locked */ 1405 struct del_info* inf = (struct del_info*)arg; 1406 struct key_entry_key* k = (struct key_entry_key*)e->key; 1407 if(dname_subdomain_c(k->name, inf->name)) { 1408 struct key_entry_data* d = (struct key_entry_data*)e->data; 1409 if(d->ttl > inf->expired) { 1410 d->ttl = inf->expired; 1411 inf->num_keys++; 1412 } 1413 } 1414 } 1415 1416 /** remove all rrsets and keys from zone from cache */ 1417 static void 1418 do_flush_zone(SSL* ssl, struct worker* worker, char* arg) 1419 { 1420 uint8_t* nm; 1421 int nmlabs; 1422 size_t nmlen; 1423 struct del_info inf; 1424 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1425 return; 1426 /* delete all RRs and key entries from zone */ 1427 /* what we do is to set them all expired */ 1428 inf.worker = worker; 1429 inf.name = nm; 1430 inf.len = nmlen; 1431 inf.labs = nmlabs; 1432 inf.expired = *worker->env.now; 1433 inf.expired -= 3; /* handle 3 seconds skew between threads */ 1434 inf.num_rrsets = 0; 1435 inf.num_msgs = 0; 1436 inf.num_keys = 0; 1437 slabhash_traverse(&worker->env.rrset_cache->table, 1, 1438 &zone_del_rrset, &inf); 1439 1440 slabhash_traverse(worker->env.msg_cache, 1, &zone_del_msg, &inf); 1441 1442 /* and validator cache */ 1443 if(worker->env.key_cache) { 1444 slabhash_traverse(worker->env.key_cache->slab, 1, 1445 &zone_del_kcache, &inf); 1446 } 1447 1448 free(nm); 1449 1450 (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages " 1451 "and %lu key entries\n", (unsigned long)inf.num_rrsets, 1452 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys); 1453 } 1454 1455 /** callback to delete bogus rrsets */ 1456 static void 1457 bogus_del_rrset(struct lruhash_entry* e, void* arg) 1458 { 1459 /* entry is locked */ 1460 struct del_info* inf = (struct del_info*)arg; 1461 struct packed_rrset_data* d = (struct packed_rrset_data*)e->data; 1462 if(d->security == sec_status_bogus) { 1463 d->ttl = inf->expired; 1464 inf->num_rrsets++; 1465 } 1466 } 1467 1468 /** callback to delete bogus messages */ 1469 static void 1470 bogus_del_msg(struct lruhash_entry* e, void* arg) 1471 { 1472 /* entry is locked */ 1473 struct del_info* inf = (struct del_info*)arg; 1474 struct reply_info* d = (struct reply_info*)e->data; 1475 if(d->security == sec_status_bogus) { 1476 d->ttl = inf->expired; 1477 inf->num_msgs++; 1478 } 1479 } 1480 1481 /** callback to delete bogus keys */ 1482 static void 1483 bogus_del_kcache(struct lruhash_entry* e, void* arg) 1484 { 1485 /* entry is locked */ 1486 struct del_info* inf = (struct del_info*)arg; 1487 struct key_entry_data* d = (struct key_entry_data*)e->data; 1488 if(d->isbad) { 1489 d->ttl = inf->expired; 1490 inf->num_keys++; 1491 } 1492 } 1493 1494 /** remove all bogus rrsets, msgs and keys from cache */ 1495 static void 1496 do_flush_bogus(SSL* ssl, struct worker* worker) 1497 { 1498 struct del_info inf; 1499 /* what we do is to set them all expired */ 1500 inf.worker = worker; 1501 inf.expired = *worker->env.now; 1502 inf.expired -= 3; /* handle 3 seconds skew between threads */ 1503 inf.num_rrsets = 0; 1504 inf.num_msgs = 0; 1505 inf.num_keys = 0; 1506 slabhash_traverse(&worker->env.rrset_cache->table, 1, 1507 &bogus_del_rrset, &inf); 1508 1509 slabhash_traverse(worker->env.msg_cache, 1, &bogus_del_msg, &inf); 1510 1511 /* and validator cache */ 1512 if(worker->env.key_cache) { 1513 slabhash_traverse(worker->env.key_cache->slab, 1, 1514 &bogus_del_kcache, &inf); 1515 } 1516 1517 (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages " 1518 "and %lu key entries\n", (unsigned long)inf.num_rrsets, 1519 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys); 1520 } 1521 1522 /** callback to delete negative and servfail rrsets */ 1523 static void 1524 negative_del_rrset(struct lruhash_entry* e, void* arg) 1525 { 1526 /* entry is locked */ 1527 struct del_info* inf = (struct del_info*)arg; 1528 struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)e->key; 1529 struct packed_rrset_data* d = (struct packed_rrset_data*)e->data; 1530 /* delete the parentside negative cache rrsets, 1531 * these are namerserver rrsets that failed lookup, rdata empty */ 1532 if((k->rk.flags & PACKED_RRSET_PARENT_SIDE) && d->count == 1 && 1533 d->rrsig_count == 0 && d->rr_len[0] == 0) { 1534 d->ttl = inf->expired; 1535 inf->num_rrsets++; 1536 } 1537 } 1538 1539 /** callback to delete negative and servfail messages */ 1540 static void 1541 negative_del_msg(struct lruhash_entry* e, void* arg) 1542 { 1543 /* entry is locked */ 1544 struct del_info* inf = (struct del_info*)arg; 1545 struct reply_info* d = (struct reply_info*)e->data; 1546 /* rcode not NOERROR: NXDOMAIN, SERVFAIL, ..: an nxdomain or error 1547 * or NOERROR rcode with ANCOUNT==0: a NODATA answer */ 1548 if(FLAGS_GET_RCODE(d->flags) != 0 || d->an_numrrsets == 0) { 1549 d->ttl = inf->expired; 1550 inf->num_msgs++; 1551 } 1552 } 1553 1554 /** callback to delete negative key entries */ 1555 static void 1556 negative_del_kcache(struct lruhash_entry* e, void* arg) 1557 { 1558 /* entry is locked */ 1559 struct del_info* inf = (struct del_info*)arg; 1560 struct key_entry_data* d = (struct key_entry_data*)e->data; 1561 /* could be bad because of lookup failure on the DS, DNSKEY, which 1562 * was nxdomain or servfail, and thus a result of negative lookups */ 1563 if(d->isbad) { 1564 d->ttl = inf->expired; 1565 inf->num_keys++; 1566 } 1567 } 1568 1569 /** remove all negative(NODATA,NXDOMAIN), and servfail messages from cache */ 1570 static void 1571 do_flush_negative(SSL* ssl, struct worker* worker) 1572 { 1573 struct del_info inf; 1574 /* what we do is to set them all expired */ 1575 inf.worker = worker; 1576 inf.expired = *worker->env.now; 1577 inf.expired -= 3; /* handle 3 seconds skew between threads */ 1578 inf.num_rrsets = 0; 1579 inf.num_msgs = 0; 1580 inf.num_keys = 0; 1581 slabhash_traverse(&worker->env.rrset_cache->table, 1, 1582 &negative_del_rrset, &inf); 1583 1584 slabhash_traverse(worker->env.msg_cache, 1, &negative_del_msg, &inf); 1585 1586 /* and validator cache */ 1587 if(worker->env.key_cache) { 1588 slabhash_traverse(worker->env.key_cache->slab, 1, 1589 &negative_del_kcache, &inf); 1590 } 1591 1592 (void)ssl_printf(ssl, "ok removed %lu rrsets, %lu messages " 1593 "and %lu key entries\n", (unsigned long)inf.num_rrsets, 1594 (unsigned long)inf.num_msgs, (unsigned long)inf.num_keys); 1595 } 1596 1597 /** remove name rrset from cache */ 1598 static void 1599 do_flush_name(SSL* ssl, struct worker* w, char* arg) 1600 { 1601 uint8_t* nm; 1602 int nmlabs; 1603 size_t nmlen; 1604 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1605 return; 1606 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_A, LDNS_RR_CLASS_IN); 1607 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_AAAA, LDNS_RR_CLASS_IN); 1608 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NS, LDNS_RR_CLASS_IN); 1609 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SOA, LDNS_RR_CLASS_IN); 1610 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_CNAME, LDNS_RR_CLASS_IN); 1611 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_DNAME, LDNS_RR_CLASS_IN); 1612 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_MX, LDNS_RR_CLASS_IN); 1613 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_PTR, LDNS_RR_CLASS_IN); 1614 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_SRV, LDNS_RR_CLASS_IN); 1615 do_cache_remove(w, nm, nmlen, LDNS_RR_TYPE_NAPTR, LDNS_RR_CLASS_IN); 1616 1617 free(nm); 1618 send_ok(ssl); 1619 } 1620 1621 /** printout a delegation point info */ 1622 static int 1623 ssl_print_name_dp(SSL* ssl, const char* str, uint8_t* nm, uint16_t dclass, 1624 struct delegpt* dp) 1625 { 1626 char buf[257]; 1627 struct delegpt_ns* ns; 1628 struct delegpt_addr* a; 1629 int f = 0; 1630 if(str) { /* print header for forward, stub */ 1631 char* c = sldns_wire2str_class(dclass); 1632 dname_str(nm, buf); 1633 if(!ssl_printf(ssl, "%s %s %s ", buf, (c?c:"CLASS??"), str)) { 1634 free(c); 1635 return 0; 1636 } 1637 free(c); 1638 } 1639 for(ns = dp->nslist; ns; ns = ns->next) { 1640 dname_str(ns->name, buf); 1641 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf)) 1642 return 0; 1643 f = 1; 1644 } 1645 for(a = dp->target_list; a; a = a->next_target) { 1646 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf)); 1647 if(!ssl_printf(ssl, "%s%s", (f?" ":""), buf)) 1648 return 0; 1649 f = 1; 1650 } 1651 return ssl_printf(ssl, "\n"); 1652 } 1653 1654 1655 /** print root forwards */ 1656 static int 1657 print_root_fwds(SSL* ssl, struct iter_forwards* fwds, uint8_t* root) 1658 { 1659 struct delegpt* dp; 1660 dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN); 1661 if(!dp) 1662 return ssl_printf(ssl, "off (using root hints)\n"); 1663 /* if dp is returned it must be the root */ 1664 log_assert(query_dname_compare(dp->name, root)==0); 1665 return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp); 1666 } 1667 1668 /** parse args into delegpt */ 1669 static struct delegpt* 1670 parse_delegpt(SSL* ssl, char* args, uint8_t* nm, int allow_names) 1671 { 1672 /* parse args and add in */ 1673 char* p = args; 1674 char* todo; 1675 struct delegpt* dp = delegpt_create_mlc(nm); 1676 struct sockaddr_storage addr; 1677 socklen_t addrlen; 1678 if(!dp) { 1679 (void)ssl_printf(ssl, "error out of memory\n"); 1680 return NULL; 1681 } 1682 while(p) { 1683 todo = p; 1684 p = strchr(p, ' '); /* find next spot, if any */ 1685 if(p) { 1686 *p++ = 0; /* end this spot */ 1687 p = skipwhite(p); /* position at next spot */ 1688 } 1689 /* parse address */ 1690 if(!extstrtoaddr(todo, &addr, &addrlen)) { 1691 if(allow_names) { 1692 uint8_t* n = NULL; 1693 size_t ln; 1694 int lb; 1695 if(!parse_arg_name(ssl, todo, &n, &ln, &lb)) { 1696 (void)ssl_printf(ssl, "error cannot " 1697 "parse IP address or name " 1698 "'%s'\n", todo); 1699 delegpt_free_mlc(dp); 1700 return NULL; 1701 } 1702 if(!delegpt_add_ns_mlc(dp, n, 0)) { 1703 (void)ssl_printf(ssl, "error out of memory\n"); 1704 free(n); 1705 delegpt_free_mlc(dp); 1706 return NULL; 1707 } 1708 free(n); 1709 1710 } else { 1711 (void)ssl_printf(ssl, "error cannot parse" 1712 " IP address '%s'\n", todo); 1713 delegpt_free_mlc(dp); 1714 return NULL; 1715 } 1716 } else { 1717 /* add address */ 1718 if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0)) { 1719 (void)ssl_printf(ssl, "error out of memory\n"); 1720 delegpt_free_mlc(dp); 1721 return NULL; 1722 } 1723 } 1724 } 1725 dp->has_parent_side_NS = 1; 1726 return dp; 1727 } 1728 1729 /** do the status command */ 1730 static void 1731 do_forward(SSL* ssl, struct worker* worker, char* args) 1732 { 1733 struct iter_forwards* fwd = worker->env.fwds; 1734 uint8_t* root = (uint8_t*)"\000"; 1735 if(!fwd) { 1736 (void)ssl_printf(ssl, "error: structure not allocated\n"); 1737 return; 1738 } 1739 if(args == NULL || args[0] == 0) { 1740 (void)print_root_fwds(ssl, fwd, root); 1741 return; 1742 } 1743 /* set root forwards for this thread. since we are in remote control 1744 * the actual mesh is not running, so we can freely edit it. */ 1745 /* delete all the existing queries first */ 1746 mesh_delete_all(worker->env.mesh); 1747 if(strcmp(args, "off") == 0) { 1748 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root); 1749 } else { 1750 struct delegpt* dp; 1751 if(!(dp = parse_delegpt(ssl, args, root, 0))) 1752 return; 1753 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) { 1754 (void)ssl_printf(ssl, "error out of memory\n"); 1755 return; 1756 } 1757 } 1758 send_ok(ssl); 1759 } 1760 1761 static int 1762 parse_fs_args(SSL* ssl, char* args, uint8_t** nm, struct delegpt** dp, 1763 int* insecure, int* prime) 1764 { 1765 char* zonename; 1766 char* rest; 1767 size_t nmlen; 1768 int nmlabs; 1769 /* parse all -x args */ 1770 while(args[0] == '+') { 1771 if(!find_arg2(ssl, args, &rest)) 1772 return 0; 1773 while(*(++args) != 0) { 1774 if(*args == 'i' && insecure) 1775 *insecure = 1; 1776 else if(*args == 'p' && prime) 1777 *prime = 1; 1778 else { 1779 (void)ssl_printf(ssl, "error: unknown option %s\n", args); 1780 return 0; 1781 } 1782 } 1783 args = rest; 1784 } 1785 /* parse name */ 1786 if(dp) { 1787 if(!find_arg2(ssl, args, &rest)) 1788 return 0; 1789 zonename = args; 1790 args = rest; 1791 } else zonename = args; 1792 if(!parse_arg_name(ssl, zonename, nm, &nmlen, &nmlabs)) 1793 return 0; 1794 1795 /* parse dp */ 1796 if(dp) { 1797 if(!(*dp = parse_delegpt(ssl, args, *nm, 1))) { 1798 free(*nm); 1799 return 0; 1800 } 1801 } 1802 return 1; 1803 } 1804 1805 /** do the forward_add command */ 1806 static void 1807 do_forward_add(SSL* ssl, struct worker* worker, char* args) 1808 { 1809 struct iter_forwards* fwd = worker->env.fwds; 1810 int insecure = 0; 1811 uint8_t* nm = NULL; 1812 struct delegpt* dp = NULL; 1813 if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL)) 1814 return; 1815 if(insecure && worker->env.anchors) { 1816 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN, 1817 nm)) { 1818 (void)ssl_printf(ssl, "error out of memory\n"); 1819 delegpt_free_mlc(dp); 1820 free(nm); 1821 return; 1822 } 1823 } 1824 if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) { 1825 (void)ssl_printf(ssl, "error out of memory\n"); 1826 free(nm); 1827 return; 1828 } 1829 free(nm); 1830 send_ok(ssl); 1831 } 1832 1833 /** do the forward_remove command */ 1834 static void 1835 do_forward_remove(SSL* ssl, struct worker* worker, char* args) 1836 { 1837 struct iter_forwards* fwd = worker->env.fwds; 1838 int insecure = 0; 1839 uint8_t* nm = NULL; 1840 if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL)) 1841 return; 1842 if(insecure && worker->env.anchors) 1843 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN, 1844 nm); 1845 forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm); 1846 free(nm); 1847 send_ok(ssl); 1848 } 1849 1850 /** do the stub_add command */ 1851 static void 1852 do_stub_add(SSL* ssl, struct worker* worker, char* args) 1853 { 1854 struct iter_forwards* fwd = worker->env.fwds; 1855 int insecure = 0, prime = 0; 1856 uint8_t* nm = NULL; 1857 struct delegpt* dp = NULL; 1858 if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime)) 1859 return; 1860 if(insecure && worker->env.anchors) { 1861 if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN, 1862 nm)) { 1863 (void)ssl_printf(ssl, "error out of memory\n"); 1864 delegpt_free_mlc(dp); 1865 free(nm); 1866 return; 1867 } 1868 } 1869 if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) { 1870 if(insecure && worker->env.anchors) 1871 anchors_delete_insecure(worker->env.anchors, 1872 LDNS_RR_CLASS_IN, nm); 1873 (void)ssl_printf(ssl, "error out of memory\n"); 1874 delegpt_free_mlc(dp); 1875 free(nm); 1876 return; 1877 } 1878 if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) { 1879 (void)ssl_printf(ssl, "error out of memory\n"); 1880 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm); 1881 if(insecure && worker->env.anchors) 1882 anchors_delete_insecure(worker->env.anchors, 1883 LDNS_RR_CLASS_IN, nm); 1884 free(nm); 1885 return; 1886 } 1887 free(nm); 1888 send_ok(ssl); 1889 } 1890 1891 /** do the stub_remove command */ 1892 static void 1893 do_stub_remove(SSL* ssl, struct worker* worker, char* args) 1894 { 1895 struct iter_forwards* fwd = worker->env.fwds; 1896 int insecure = 0; 1897 uint8_t* nm = NULL; 1898 if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL)) 1899 return; 1900 if(insecure && worker->env.anchors) 1901 anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN, 1902 nm); 1903 forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm); 1904 hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm); 1905 free(nm); 1906 send_ok(ssl); 1907 } 1908 1909 /** do the insecure_add command */ 1910 static void 1911 do_insecure_add(SSL* ssl, struct worker* worker, char* arg) 1912 { 1913 size_t nmlen; 1914 int nmlabs; 1915 uint8_t* nm = NULL; 1916 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1917 return; 1918 if(worker->env.anchors) { 1919 if(!anchors_add_insecure(worker->env.anchors, 1920 LDNS_RR_CLASS_IN, nm)) { 1921 (void)ssl_printf(ssl, "error out of memory\n"); 1922 free(nm); 1923 return; 1924 } 1925 } 1926 free(nm); 1927 send_ok(ssl); 1928 } 1929 1930 /** do the insecure_remove command */ 1931 static void 1932 do_insecure_remove(SSL* ssl, struct worker* worker, char* arg) 1933 { 1934 size_t nmlen; 1935 int nmlabs; 1936 uint8_t* nm = NULL; 1937 if(!parse_arg_name(ssl, arg, &nm, &nmlen, &nmlabs)) 1938 return; 1939 if(worker->env.anchors) 1940 anchors_delete_insecure(worker->env.anchors, 1941 LDNS_RR_CLASS_IN, nm); 1942 free(nm); 1943 send_ok(ssl); 1944 } 1945 1946 static void 1947 do_insecure_list(SSL* ssl, struct worker* worker) 1948 { 1949 char buf[257]; 1950 struct trust_anchor* a; 1951 if(worker->env.anchors) { 1952 RBTREE_FOR(a, struct trust_anchor*, worker->env.anchors->tree) { 1953 if(a->numDS == 0 && a->numDNSKEY == 0) { 1954 dname_str(a->name, buf); 1955 ssl_printf(ssl, "%s\n", buf); 1956 } 1957 } 1958 } 1959 } 1960 1961 /** do the status command */ 1962 static void 1963 do_status(SSL* ssl, struct worker* worker) 1964 { 1965 int i; 1966 time_t uptime; 1967 if(!ssl_printf(ssl, "version: %s\n", PACKAGE_VERSION)) 1968 return; 1969 if(!ssl_printf(ssl, "verbosity: %d\n", verbosity)) 1970 return; 1971 if(!ssl_printf(ssl, "threads: %d\n", worker->daemon->num)) 1972 return; 1973 if(!ssl_printf(ssl, "modules: %d [", worker->daemon->mods.num)) 1974 return; 1975 for(i=0; i<worker->daemon->mods.num; i++) { 1976 if(!ssl_printf(ssl, " %s", worker->daemon->mods.mod[i]->name)) 1977 return; 1978 } 1979 if(!ssl_printf(ssl, " ]\n")) 1980 return; 1981 uptime = (time_t)time(NULL) - (time_t)worker->daemon->time_boot.tv_sec; 1982 if(!ssl_printf(ssl, "uptime: " ARG_LL "d seconds\n", (long long)uptime)) 1983 return; 1984 if(!ssl_printf(ssl, "options:%s%s\n" , 1985 (worker->daemon->reuseport?" reuseport":""), 1986 (worker->daemon->rc->accept_list?" control(ssl)":""))) 1987 return; 1988 if(!ssl_printf(ssl, "unbound (pid %d) is running...\n", 1989 (int)getpid())) 1990 return; 1991 } 1992 1993 /** get age for the mesh state */ 1994 static void 1995 get_mesh_age(struct mesh_state* m, char* buf, size_t len, 1996 struct module_env* env) 1997 { 1998 if(m->reply_list) { 1999 struct timeval d; 2000 struct mesh_reply* r = m->reply_list; 2001 /* last reply is the oldest */ 2002 while(r && r->next) 2003 r = r->next; 2004 timeval_subtract(&d, env->now_tv, &r->start_time); 2005 snprintf(buf, len, ARG_LL "d.%6.6d", 2006 (long long)d.tv_sec, (int)d.tv_usec); 2007 } else { 2008 snprintf(buf, len, "-"); 2009 } 2010 } 2011 2012 /** get status of a mesh state */ 2013 static void 2014 get_mesh_status(struct mesh_area* mesh, struct mesh_state* m, 2015 char* buf, size_t len) 2016 { 2017 enum module_ext_state s = m->s.ext_state[m->s.curmod]; 2018 const char *modname = mesh->mods.mod[m->s.curmod]->name; 2019 size_t l; 2020 if(strcmp(modname, "iterator") == 0 && s == module_wait_reply && 2021 m->s.minfo[m->s.curmod]) { 2022 /* break into iterator to find out who its waiting for */ 2023 struct iter_qstate* qstate = (struct iter_qstate*) 2024 m->s.minfo[m->s.curmod]; 2025 struct outbound_list* ol = &qstate->outlist; 2026 struct outbound_entry* e; 2027 snprintf(buf, len, "%s wait for", modname); 2028 l = strlen(buf); 2029 buf += l; len -= l; 2030 if(ol->first == NULL) 2031 snprintf(buf, len, " (empty_list)"); 2032 for(e = ol->first; e; e = e->next) { 2033 snprintf(buf, len, " "); 2034 l = strlen(buf); 2035 buf += l; len -= l; 2036 addr_to_str(&e->qsent->addr, e->qsent->addrlen, 2037 buf, len); 2038 l = strlen(buf); 2039 buf += l; len -= l; 2040 } 2041 } else if(s == module_wait_subquery) { 2042 /* look in subs from mesh state to see what */ 2043 char nm[257]; 2044 struct mesh_state_ref* sub; 2045 snprintf(buf, len, "%s wants", modname); 2046 l = strlen(buf); 2047 buf += l; len -= l; 2048 if(m->sub_set.count == 0) 2049 snprintf(buf, len, " (empty_list)"); 2050 RBTREE_FOR(sub, struct mesh_state_ref*, &m->sub_set) { 2051 char* t = sldns_wire2str_type(sub->s->s.qinfo.qtype); 2052 char* c = sldns_wire2str_class(sub->s->s.qinfo.qclass); 2053 dname_str(sub->s->s.qinfo.qname, nm); 2054 snprintf(buf, len, " %s %s %s", (t?t:"TYPE??"), 2055 (c?c:"CLASS??"), nm); 2056 l = strlen(buf); 2057 buf += l; len -= l; 2058 free(t); 2059 free(c); 2060 } 2061 } else { 2062 snprintf(buf, len, "%s is %s", modname, strextstate(s)); 2063 } 2064 } 2065 2066 /** do the dump_requestlist command */ 2067 static void 2068 do_dump_requestlist(SSL* ssl, struct worker* worker) 2069 { 2070 struct mesh_area* mesh; 2071 struct mesh_state* m; 2072 int num = 0; 2073 char buf[257]; 2074 char timebuf[32]; 2075 char statbuf[10240]; 2076 if(!ssl_printf(ssl, "thread #%d\n", worker->thread_num)) 2077 return; 2078 if(!ssl_printf(ssl, "# type cl name seconds module status\n")) 2079 return; 2080 /* show worker mesh contents */ 2081 mesh = worker->env.mesh; 2082 if(!mesh) return; 2083 RBTREE_FOR(m, struct mesh_state*, &mesh->all) { 2084 char* t = sldns_wire2str_type(m->s.qinfo.qtype); 2085 char* c = sldns_wire2str_class(m->s.qinfo.qclass); 2086 dname_str(m->s.qinfo.qname, buf); 2087 get_mesh_age(m, timebuf, sizeof(timebuf), &worker->env); 2088 get_mesh_status(mesh, m, statbuf, sizeof(statbuf)); 2089 if(!ssl_printf(ssl, "%3d %4s %2s %s %s %s\n", 2090 num, (t?t:"TYPE??"), (c?c:"CLASS??"), buf, timebuf, 2091 statbuf)) { 2092 free(t); 2093 free(c); 2094 return; 2095 } 2096 num++; 2097 free(t); 2098 free(c); 2099 } 2100 } 2101 2102 /** structure for argument data for dump infra host */ 2103 struct infra_arg { 2104 /** the infra cache */ 2105 struct infra_cache* infra; 2106 /** the SSL connection */ 2107 SSL* ssl; 2108 /** the time now */ 2109 time_t now; 2110 /** ssl failure? stop writing and skip the rest. If the tcp 2111 * connection is broken, and writes fail, we then stop writing. */ 2112 int ssl_failed; 2113 }; 2114 2115 /** callback for every host element in the infra cache */ 2116 static void 2117 dump_infra_host(struct lruhash_entry* e, void* arg) 2118 { 2119 struct infra_arg* a = (struct infra_arg*)arg; 2120 struct infra_key* k = (struct infra_key*)e->key; 2121 struct infra_data* d = (struct infra_data*)e->data; 2122 char ip_str[1024]; 2123 char name[257]; 2124 if(a->ssl_failed) 2125 return; 2126 addr_to_str(&k->addr, k->addrlen, ip_str, sizeof(ip_str)); 2127 dname_str(k->zonename, name); 2128 /* skip expired stuff (only backed off) */ 2129 if(d->ttl < a->now) { 2130 if(d->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) { 2131 if(!ssl_printf(a->ssl, "%s %s expired rto %d\n", ip_str, 2132 name, d->rtt.rto)) { 2133 a->ssl_failed = 1; 2134 return; 2135 } 2136 } 2137 return; 2138 } 2139 if(!ssl_printf(a->ssl, "%s %s ttl %lu ping %d var %d rtt %d rto %d " 2140 "tA %d tAAAA %d tother %d " 2141 "ednsknown %d edns %d delay %d lame dnssec %d rec %d A %d " 2142 "other %d\n", ip_str, name, (unsigned long)(d->ttl - a->now), 2143 d->rtt.srtt, d->rtt.rttvar, rtt_notimeout(&d->rtt), d->rtt.rto, 2144 d->timeout_A, d->timeout_AAAA, d->timeout_other, 2145 (int)d->edns_lame_known, (int)d->edns_version, 2146 (int)(a->now<d->probedelay?(d->probedelay - a->now):0), 2147 (int)d->isdnsseclame, (int)d->rec_lame, (int)d->lame_type_A, 2148 (int)d->lame_other)) { 2149 a->ssl_failed = 1; 2150 return; 2151 } 2152 } 2153 2154 /** do the dump_infra command */ 2155 static void 2156 do_dump_infra(SSL* ssl, struct worker* worker) 2157 { 2158 struct infra_arg arg; 2159 arg.infra = worker->env.infra_cache; 2160 arg.ssl = ssl; 2161 arg.now = *worker->env.now; 2162 arg.ssl_failed = 0; 2163 slabhash_traverse(arg.infra->hosts, 0, &dump_infra_host, (void*)&arg); 2164 } 2165 2166 /** do the log_reopen command */ 2167 static void 2168 do_log_reopen(SSL* ssl, struct worker* worker) 2169 { 2170 struct config_file* cfg = worker->env.cfg; 2171 send_ok(ssl); 2172 log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir); 2173 } 2174 2175 /** do the set_option command */ 2176 static void 2177 do_set_option(SSL* ssl, struct worker* worker, char* arg) 2178 { 2179 char* arg2; 2180 if(!find_arg2(ssl, arg, &arg2)) 2181 return; 2182 if(!config_set_option(worker->env.cfg, arg, arg2)) { 2183 (void)ssl_printf(ssl, "error setting option\n"); 2184 return; 2185 } 2186 send_ok(ssl); 2187 } 2188 2189 /* routine to printout option values over SSL */ 2190 void remote_get_opt_ssl(char* line, void* arg) 2191 { 2192 SSL* ssl = (SSL*)arg; 2193 (void)ssl_printf(ssl, "%s\n", line); 2194 } 2195 2196 /** do the get_option command */ 2197 static void 2198 do_get_option(SSL* ssl, struct worker* worker, char* arg) 2199 { 2200 int r; 2201 r = config_get_option(worker->env.cfg, arg, remote_get_opt_ssl, ssl); 2202 if(!r) { 2203 (void)ssl_printf(ssl, "error unknown option\n"); 2204 return; 2205 } 2206 } 2207 2208 /** do the list_forwards command */ 2209 static void 2210 do_list_forwards(SSL* ssl, struct worker* worker) 2211 { 2212 /* since its a per-worker structure no locks needed */ 2213 struct iter_forwards* fwds = worker->env.fwds; 2214 struct iter_forward_zone* z; 2215 struct trust_anchor* a; 2216 int insecure; 2217 RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) { 2218 if(!z->dp) continue; /* skip empty marker for stub */ 2219 2220 /* see if it is insecure */ 2221 insecure = 0; 2222 if(worker->env.anchors && 2223 (a=anchor_find(worker->env.anchors, z->name, 2224 z->namelabs, z->namelen, z->dclass))) { 2225 if(!a->keylist && !a->numDS && !a->numDNSKEY) 2226 insecure = 1; 2227 lock_basic_unlock(&a->lock); 2228 } 2229 2230 if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"), 2231 z->name, z->dclass, z->dp)) 2232 return; 2233 } 2234 } 2235 2236 /** do the list_stubs command */ 2237 static void 2238 do_list_stubs(SSL* ssl, struct worker* worker) 2239 { 2240 struct iter_hints_stub* z; 2241 struct trust_anchor* a; 2242 int insecure; 2243 char str[32]; 2244 RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) { 2245 2246 /* see if it is insecure */ 2247 insecure = 0; 2248 if(worker->env.anchors && 2249 (a=anchor_find(worker->env.anchors, z->node.name, 2250 z->node.labs, z->node.len, z->node.dclass))) { 2251 if(!a->keylist && !a->numDS && !a->numDNSKEY) 2252 insecure = 1; 2253 lock_basic_unlock(&a->lock); 2254 } 2255 2256 snprintf(str, sizeof(str), "stub %sprime%s", 2257 (z->noprime?"no":""), (insecure?" +i":"")); 2258 if(!ssl_print_name_dp(ssl, str, z->node.name, 2259 z->node.dclass, z->dp)) 2260 return; 2261 } 2262 } 2263 2264 /** do the list_local_zones command */ 2265 static void 2266 do_list_local_zones(SSL* ssl, struct worker* worker) 2267 { 2268 struct local_zones* zones = worker->daemon->local_zones; 2269 struct local_zone* z; 2270 char buf[257]; 2271 lock_rw_rdlock(&zones->lock); 2272 RBTREE_FOR(z, struct local_zone*, &zones->ztree) { 2273 lock_rw_rdlock(&z->lock); 2274 dname_str(z->name, buf); 2275 if(!ssl_printf(ssl, "%s %s\n", buf, 2276 local_zone_type2str(z->type))) { 2277 /* failure to print */ 2278 lock_rw_unlock(&z->lock); 2279 lock_rw_unlock(&zones->lock); 2280 return; 2281 } 2282 lock_rw_unlock(&z->lock); 2283 } 2284 lock_rw_unlock(&zones->lock); 2285 } 2286 2287 /** do the list_local_data command */ 2288 static void 2289 do_list_local_data(SSL* ssl, struct worker* worker) 2290 { 2291 struct local_zones* zones = worker->daemon->local_zones; 2292 struct local_zone* z; 2293 struct local_data* d; 2294 struct local_rrset* p; 2295 char* s = (char*)sldns_buffer_begin(worker->env.scratch_buffer); 2296 size_t slen = sldns_buffer_capacity(worker->env.scratch_buffer); 2297 lock_rw_rdlock(&zones->lock); 2298 RBTREE_FOR(z, struct local_zone*, &zones->ztree) { 2299 lock_rw_rdlock(&z->lock); 2300 RBTREE_FOR(d, struct local_data*, &z->data) { 2301 for(p = d->rrsets; p; p = p->next) { 2302 struct packed_rrset_data* d = 2303 (struct packed_rrset_data*)p->rrset->entry.data; 2304 size_t i; 2305 for(i=0; i<d->count + d->rrsig_count; i++) { 2306 if(!packed_rr_to_string(p->rrset, i, 2307 0, s, slen)) { 2308 if(!ssl_printf(ssl, "BADRR\n")) { 2309 lock_rw_unlock(&z->lock); 2310 lock_rw_unlock(&zones->lock); 2311 return; 2312 } 2313 } 2314 if(!ssl_printf(ssl, "%s\n", s)) { 2315 lock_rw_unlock(&z->lock); 2316 lock_rw_unlock(&zones->lock); 2317 return; 2318 } 2319 } 2320 } 2321 } 2322 lock_rw_unlock(&z->lock); 2323 } 2324 lock_rw_unlock(&zones->lock); 2325 } 2326 2327 /** struct for user arg ratelimit list */ 2328 struct ratelimit_list_arg { 2329 /** the infra cache */ 2330 struct infra_cache* infra; 2331 /** the SSL to print to */ 2332 SSL* ssl; 2333 /** all or only ratelimited */ 2334 int all; 2335 /** current time */ 2336 time_t now; 2337 }; 2338 2339 /** list items in the ratelimit table */ 2340 static void 2341 rate_list(struct lruhash_entry* e, void* arg) 2342 { 2343 struct ratelimit_list_arg* a = (struct ratelimit_list_arg*)arg; 2344 struct rate_key* k = (struct rate_key*)e->key; 2345 struct rate_data* d = (struct rate_data*)e->data; 2346 char buf[257]; 2347 int lim = infra_find_ratelimit(a->infra, k->name, k->namelen); 2348 int max = infra_rate_max(d, a->now); 2349 if(a->all == 0) { 2350 if(max < lim) 2351 return; 2352 } 2353 dname_str(k->name, buf); 2354 ssl_printf(a->ssl, "%s %d limit %d\n", buf, max, lim); 2355 } 2356 2357 /** do the ratelimit_list command */ 2358 static void 2359 do_ratelimit_list(SSL* ssl, struct worker* worker, char* arg) 2360 { 2361 struct ratelimit_list_arg a; 2362 a.all = 0; 2363 a.infra = worker->env.infra_cache; 2364 a.now = *worker->env.now; 2365 a.ssl = ssl; 2366 arg = skipwhite(arg); 2367 if(strcmp(arg, "+a") == 0) 2368 a.all = 1; 2369 if(a.infra->domain_rates==NULL || 2370 (a.all == 0 && infra_dp_ratelimit == 0)) 2371 return; 2372 slabhash_traverse(a.infra->domain_rates, 0, rate_list, &a); 2373 } 2374 2375 /** tell other processes to execute the command */ 2376 static void 2377 distribute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd) 2378 { 2379 int i; 2380 if(!cmd || !ssl) 2381 return; 2382 /* skip i=0 which is me */ 2383 for(i=1; i<rc->worker->daemon->num; i++) { 2384 worker_send_cmd(rc->worker->daemon->workers[i], 2385 worker_cmd_remote); 2386 if(!tube_write_msg(rc->worker->daemon->workers[i]->cmd, 2387 (uint8_t*)cmd, strlen(cmd)+1, 0)) { 2388 ssl_printf(ssl, "error could not distribute cmd\n"); 2389 return; 2390 } 2391 } 2392 } 2393 2394 /** check for name with end-of-string, space or tab after it */ 2395 static int 2396 cmdcmp(char* p, const char* cmd, size_t len) 2397 { 2398 return strncmp(p,cmd,len)==0 && (p[len]==0||p[len]==' '||p[len]=='\t'); 2399 } 2400 2401 /** execute a remote control command */ 2402 static void 2403 execute_cmd(struct daemon_remote* rc, SSL* ssl, char* cmd, 2404 struct worker* worker) 2405 { 2406 char* p = skipwhite(cmd); 2407 /* compare command */ 2408 if(cmdcmp(p, "stop", 4)) { 2409 do_stop(ssl, rc); 2410 return; 2411 } else if(cmdcmp(p, "reload", 6)) { 2412 do_reload(ssl, rc); 2413 return; 2414 } else if(cmdcmp(p, "stats_noreset", 13)) { 2415 do_stats(ssl, rc, 0); 2416 return; 2417 } else if(cmdcmp(p, "stats", 5)) { 2418 do_stats(ssl, rc, 1); 2419 return; 2420 } else if(cmdcmp(p, "status", 6)) { 2421 do_status(ssl, worker); 2422 return; 2423 } else if(cmdcmp(p, "dump_cache", 10)) { 2424 (void)dump_cache(ssl, worker); 2425 return; 2426 } else if(cmdcmp(p, "load_cache", 10)) { 2427 if(load_cache(ssl, worker)) send_ok(ssl); 2428 return; 2429 } else if(cmdcmp(p, "list_forwards", 13)) { 2430 do_list_forwards(ssl, worker); 2431 return; 2432 } else if(cmdcmp(p, "list_stubs", 10)) { 2433 do_list_stubs(ssl, worker); 2434 return; 2435 } else if(cmdcmp(p, "list_insecure", 13)) { 2436 do_insecure_list(ssl, worker); 2437 return; 2438 } else if(cmdcmp(p, "list_local_zones", 16)) { 2439 do_list_local_zones(ssl, worker); 2440 return; 2441 } else if(cmdcmp(p, "list_local_data", 15)) { 2442 do_list_local_data(ssl, worker); 2443 return; 2444 } else if(cmdcmp(p, "ratelimit_list", 14)) { 2445 do_ratelimit_list(ssl, worker, p+14); 2446 return; 2447 } else if(cmdcmp(p, "stub_add", 8)) { 2448 /* must always distribute this cmd */ 2449 if(rc) distribute_cmd(rc, ssl, cmd); 2450 do_stub_add(ssl, worker, skipwhite(p+8)); 2451 return; 2452 } else if(cmdcmp(p, "stub_remove", 11)) { 2453 /* must always distribute this cmd */ 2454 if(rc) distribute_cmd(rc, ssl, cmd); 2455 do_stub_remove(ssl, worker, skipwhite(p+11)); 2456 return; 2457 } else if(cmdcmp(p, "forward_add", 11)) { 2458 /* must always distribute this cmd */ 2459 if(rc) distribute_cmd(rc, ssl, cmd); 2460 do_forward_add(ssl, worker, skipwhite(p+11)); 2461 return; 2462 } else if(cmdcmp(p, "forward_remove", 14)) { 2463 /* must always distribute this cmd */ 2464 if(rc) distribute_cmd(rc, ssl, cmd); 2465 do_forward_remove(ssl, worker, skipwhite(p+14)); 2466 return; 2467 } else if(cmdcmp(p, "insecure_add", 12)) { 2468 /* must always distribute this cmd */ 2469 if(rc) distribute_cmd(rc, ssl, cmd); 2470 do_insecure_add(ssl, worker, skipwhite(p+12)); 2471 return; 2472 } else if(cmdcmp(p, "insecure_remove", 15)) { 2473 /* must always distribute this cmd */ 2474 if(rc) distribute_cmd(rc, ssl, cmd); 2475 do_insecure_remove(ssl, worker, skipwhite(p+15)); 2476 return; 2477 } else if(cmdcmp(p, "forward", 7)) { 2478 /* must always distribute this cmd */ 2479 if(rc) distribute_cmd(rc, ssl, cmd); 2480 do_forward(ssl, worker, skipwhite(p+7)); 2481 return; 2482 } else if(cmdcmp(p, "flush_stats", 11)) { 2483 /* must always distribute this cmd */ 2484 if(rc) distribute_cmd(rc, ssl, cmd); 2485 do_flush_stats(ssl, worker); 2486 return; 2487 } else if(cmdcmp(p, "flush_requestlist", 17)) { 2488 /* must always distribute this cmd */ 2489 if(rc) distribute_cmd(rc, ssl, cmd); 2490 do_flush_requestlist(ssl, worker); 2491 return; 2492 } else if(cmdcmp(p, "lookup", 6)) { 2493 do_lookup(ssl, worker, skipwhite(p+6)); 2494 return; 2495 } 2496 2497 #ifdef THREADS_DISABLED 2498 /* other processes must execute the command as well */ 2499 /* commands that should not be distributed, returned above. */ 2500 if(rc) { /* only if this thread is the master (rc) thread */ 2501 /* done before the code below, which may split the string */ 2502 distribute_cmd(rc, ssl, cmd); 2503 } 2504 #endif 2505 if(cmdcmp(p, "verbosity", 9)) { 2506 do_verbosity(ssl, skipwhite(p+9)); 2507 } else if(cmdcmp(p, "local_zone_remove", 17)) { 2508 do_zone_remove(ssl, worker, skipwhite(p+17)); 2509 } else if(cmdcmp(p, "local_zone", 10)) { 2510 do_zone_add(ssl, worker, skipwhite(p+10)); 2511 } else if(cmdcmp(p, "local_data_remove", 17)) { 2512 do_data_remove(ssl, worker, skipwhite(p+17)); 2513 } else if(cmdcmp(p, "local_data", 10)) { 2514 do_data_add(ssl, worker, skipwhite(p+10)); 2515 } else if(cmdcmp(p, "flush_zone", 10)) { 2516 do_flush_zone(ssl, worker, skipwhite(p+10)); 2517 } else if(cmdcmp(p, "flush_type", 10)) { 2518 do_flush_type(ssl, worker, skipwhite(p+10)); 2519 } else if(cmdcmp(p, "flush_infra", 11)) { 2520 do_flush_infra(ssl, worker, skipwhite(p+11)); 2521 } else if(cmdcmp(p, "flush", 5)) { 2522 do_flush_name(ssl, worker, skipwhite(p+5)); 2523 } else if(cmdcmp(p, "dump_requestlist", 16)) { 2524 do_dump_requestlist(ssl, worker); 2525 } else if(cmdcmp(p, "dump_infra", 10)) { 2526 do_dump_infra(ssl, worker); 2527 } else if(cmdcmp(p, "log_reopen", 10)) { 2528 do_log_reopen(ssl, worker); 2529 } else if(cmdcmp(p, "set_option", 10)) { 2530 do_set_option(ssl, worker, skipwhite(p+10)); 2531 } else if(cmdcmp(p, "get_option", 10)) { 2532 do_get_option(ssl, worker, skipwhite(p+10)); 2533 } else if(cmdcmp(p, "flush_bogus", 11)) { 2534 do_flush_bogus(ssl, worker); 2535 } else if(cmdcmp(p, "flush_negative", 14)) { 2536 do_flush_negative(ssl, worker); 2537 } else { 2538 (void)ssl_printf(ssl, "error unknown command '%s'\n", p); 2539 } 2540 } 2541 2542 void 2543 daemon_remote_exec(struct worker* worker) 2544 { 2545 /* read the cmd string */ 2546 uint8_t* msg = NULL; 2547 uint32_t len = 0; 2548 if(!tube_read_msg(worker->cmd, &msg, &len, 0)) { 2549 log_err("daemon_remote_exec: tube_read_msg failed"); 2550 return; 2551 } 2552 verbose(VERB_ALGO, "remote exec distributed: %s", (char*)msg); 2553 execute_cmd(NULL, NULL, (char*)msg, worker); 2554 free(msg); 2555 } 2556 2557 /** handle remote control request */ 2558 static void 2559 handle_req(struct daemon_remote* rc, struct rc_state* s, SSL* ssl) 2560 { 2561 int r; 2562 char pre[10]; 2563 char magic[7]; 2564 char buf[1024]; 2565 #ifdef USE_WINSOCK 2566 /* makes it possible to set the socket blocking again. */ 2567 /* basically removes it from winsock_event ... */ 2568 WSAEventSelect(s->c->fd, NULL, 0); 2569 #endif 2570 fd_set_block(s->c->fd); 2571 2572 /* try to read magic UBCT[version]_space_ string */ 2573 ERR_clear_error(); 2574 if((r=SSL_read(ssl, magic, (int)sizeof(magic)-1)) <= 0) { 2575 if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) 2576 return; 2577 log_crypto_err("could not SSL_read"); 2578 return; 2579 } 2580 magic[6] = 0; 2581 if( r != 6 || strncmp(magic, "UBCT", 4) != 0) { 2582 verbose(VERB_QUERY, "control connection has bad magic string"); 2583 /* probably wrong tool connected, ignore it completely */ 2584 return; 2585 } 2586 2587 /* read the command line */ 2588 if(!ssl_read_line(ssl, buf, sizeof(buf))) { 2589 return; 2590 } 2591 snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION); 2592 if(strcmp(magic, pre) != 0) { 2593 verbose(VERB_QUERY, "control connection had bad " 2594 "version %s, cmd: %s", magic, buf); 2595 ssl_printf(ssl, "error version mismatch\n"); 2596 return; 2597 } 2598 verbose(VERB_DETAIL, "control cmd: %s", buf); 2599 2600 /* figure out what to do */ 2601 execute_cmd(rc, ssl, buf, rc->worker); 2602 } 2603 2604 int remote_control_callback(struct comm_point* c, void* arg, int err, 2605 struct comm_reply* ATTR_UNUSED(rep)) 2606 { 2607 struct rc_state* s = (struct rc_state*)arg; 2608 struct daemon_remote* rc = s->rc; 2609 int r; 2610 if(err != NETEVENT_NOERROR) { 2611 if(err==NETEVENT_TIMEOUT) 2612 log_err("remote control timed out"); 2613 clean_point(rc, s); 2614 return 0; 2615 } 2616 /* (continue to) setup the SSL connection */ 2617 ERR_clear_error(); 2618 r = SSL_do_handshake(s->ssl); 2619 if(r != 1) { 2620 int r2 = SSL_get_error(s->ssl, r); 2621 if(r2 == SSL_ERROR_WANT_READ) { 2622 if(s->shake_state == rc_hs_read) { 2623 /* try again later */ 2624 return 0; 2625 } 2626 s->shake_state = rc_hs_read; 2627 comm_point_listen_for_rw(c, 1, 0); 2628 return 0; 2629 } else if(r2 == SSL_ERROR_WANT_WRITE) { 2630 if(s->shake_state == rc_hs_write) { 2631 /* try again later */ 2632 return 0; 2633 } 2634 s->shake_state = rc_hs_write; 2635 comm_point_listen_for_rw(c, 0, 1); 2636 return 0; 2637 } else { 2638 if(r == 0) 2639 log_err("remote control connection closed prematurely"); 2640 log_addr(1, "failed connection from", 2641 &s->c->repinfo.addr, s->c->repinfo.addrlen); 2642 log_crypto_err("remote control failed ssl"); 2643 clean_point(rc, s); 2644 return 0; 2645 } 2646 } 2647 s->shake_state = rc_none; 2648 2649 /* once handshake has completed, check authentication */ 2650 if (!rc->use_cert) { 2651 verbose(VERB_ALGO, "unauthenticated remote control connection"); 2652 } else if(SSL_get_verify_result(s->ssl) == X509_V_OK) { 2653 X509* x = SSL_get_peer_certificate(s->ssl); 2654 if(!x) { 2655 verbose(VERB_DETAIL, "remote control connection " 2656 "provided no client certificate"); 2657 clean_point(rc, s); 2658 return 0; 2659 } 2660 verbose(VERB_ALGO, "remote control connection authenticated"); 2661 X509_free(x); 2662 } else { 2663 verbose(VERB_DETAIL, "remote control connection failed to " 2664 "authenticate with client certificate"); 2665 clean_point(rc, s); 2666 return 0; 2667 } 2668 2669 /* if OK start to actually handle the request */ 2670 handle_req(rc, s, s->ssl); 2671 2672 verbose(VERB_ALGO, "remote control operation completed"); 2673 clean_point(rc, s); 2674 return 0; 2675 } 2676