1238106Sdes/* 2238106Sdes * services/outside_network.c - implement sending of queries and wait answer. 3238106Sdes * 4238106Sdes * Copyright (c) 2007, NLnet Labs. All rights reserved. 5238106Sdes * 6238106Sdes * This software is open source. 7238106Sdes * 8238106Sdes * Redistribution and use in source and binary forms, with or without 9238106Sdes * modification, are permitted provided that the following conditions 10238106Sdes * are met: 11238106Sdes * 12238106Sdes * Redistributions of source code must retain the above copyright notice, 13238106Sdes * this list of conditions and the following disclaimer. 14238106Sdes * 15238106Sdes * Redistributions in binary form must reproduce the above copyright notice, 16238106Sdes * this list of conditions and the following disclaimer in the documentation 17238106Sdes * and/or other materials provided with the distribution. 18238106Sdes * 19238106Sdes * Neither the name of the NLNET LABS nor the names of its contributors may 20238106Sdes * be used to endorse or promote products derived from this software without 21238106Sdes * specific prior written permission. 22238106Sdes * 23238106Sdes * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24238106Sdes * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25238106Sdes * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26238106Sdes * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 27238106Sdes * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28238106Sdes * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29238106Sdes * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30238106Sdes * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31238106Sdes * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32238106Sdes * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33238106Sdes * POSSIBILITY OF SUCH DAMAGE. 34238106Sdes */ 35238106Sdes 36238106Sdes/** 37238106Sdes * \file 38238106Sdes * 39238106Sdes * This file has functions to send queries to authoritative servers and 40238106Sdes * wait for the pending answer events. 41238106Sdes */ 42238106Sdes#include "config.h" 43238106Sdes#include <ctype.h> 44238106Sdes#ifdef HAVE_SYS_TYPES_H 45238106Sdes# include <sys/types.h> 46238106Sdes#endif 47238106Sdes#include <sys/time.h> 48238106Sdes#include <ldns/wire2host.h> 49238106Sdes#include "services/outside_network.h" 50238106Sdes#include "services/listen_dnsport.h" 51238106Sdes#include "services/cache/infra.h" 52238106Sdes#include "util/data/msgparse.h" 53238106Sdes#include "util/data/msgreply.h" 54238106Sdes#include "util/data/msgencode.h" 55238106Sdes#include "util/data/dname.h" 56238106Sdes#include "util/netevent.h" 57238106Sdes#include "util/log.h" 58238106Sdes#include "util/net_help.h" 59238106Sdes#include "util/random.h" 60238106Sdes#include "util/fptr_wlist.h" 61249141Sdes#ifdef HAVE_OPENSSL_SSL_H 62238106Sdes#include <openssl/ssl.h> 63249141Sdes#endif 64238106Sdes 65238106Sdes#ifdef HAVE_NETDB_H 66238106Sdes#include <netdb.h> 67238106Sdes#endif 68238106Sdes#include <fcntl.h> 69238106Sdes 70238106Sdes/** number of times to retry making a random ID that is unique. */ 71238106Sdes#define MAX_ID_RETRY 1000 72238106Sdes/** number of times to retry finding interface, port that can be opened. */ 73238106Sdes#define MAX_PORT_RETRY 10000 74238106Sdes/** number of retries on outgoing UDP queries */ 75238106Sdes#define OUTBOUND_UDP_RETRY 1 76238106Sdes 77238106Sdes/** initiate TCP transaction for serviced query */ 78238106Sdesstatic void serviced_tcp_initiate(struct outside_network* outnet, 79238106Sdes struct serviced_query* sq, ldns_buffer* buff); 80238106Sdes/** with a fd available, randomize and send UDP */ 81238106Sdesstatic int randomize_and_send_udp(struct outside_network* outnet, 82238106Sdes struct pending* pend, ldns_buffer* packet, int timeout); 83238106Sdes 84238106Sdesint 85238106Sdespending_cmp(const void* key1, const void* key2) 86238106Sdes{ 87238106Sdes struct pending *p1 = (struct pending*)key1; 88238106Sdes struct pending *p2 = (struct pending*)key2; 89238106Sdes if(p1->id < p2->id) 90238106Sdes return -1; 91238106Sdes if(p1->id > p2->id) 92238106Sdes return 1; 93238106Sdes log_assert(p1->id == p2->id); 94238106Sdes return sockaddr_cmp(&p1->addr, p1->addrlen, &p2->addr, p2->addrlen); 95238106Sdes} 96238106Sdes 97238106Sdesint 98238106Sdesserviced_cmp(const void* key1, const void* key2) 99238106Sdes{ 100238106Sdes struct serviced_query* q1 = (struct serviced_query*)key1; 101238106Sdes struct serviced_query* q2 = (struct serviced_query*)key2; 102238106Sdes int r; 103238106Sdes if(q1->qbuflen < q2->qbuflen) 104238106Sdes return -1; 105238106Sdes if(q1->qbuflen > q2->qbuflen) 106238106Sdes return 1; 107238106Sdes log_assert(q1->qbuflen == q2->qbuflen); 108238106Sdes log_assert(q1->qbuflen >= 15 /* 10 header, root, type, class */); 109238106Sdes /* alternate casing of qname is still the same query */ 110238106Sdes if((r = memcmp(q1->qbuf, q2->qbuf, 10)) != 0) 111238106Sdes return r; 112238106Sdes if((r = memcmp(q1->qbuf+q1->qbuflen-4, q2->qbuf+q2->qbuflen-4, 4)) != 0) 113238106Sdes return r; 114238106Sdes if(q1->dnssec != q2->dnssec) { 115238106Sdes if(q1->dnssec < q2->dnssec) 116238106Sdes return -1; 117238106Sdes return 1; 118238106Sdes } 119238106Sdes if((r = query_dname_compare(q1->qbuf+10, q2->qbuf+10)) != 0) 120238106Sdes return r; 121238106Sdes return sockaddr_cmp(&q1->addr, q1->addrlen, &q2->addr, q2->addrlen); 122238106Sdes} 123238106Sdes 124238106Sdes/** delete waiting_tcp entry. Does not unlink from waiting list. 125238106Sdes * @param w: to delete. 126238106Sdes */ 127238106Sdesstatic void 128238106Sdeswaiting_tcp_delete(struct waiting_tcp* w) 129238106Sdes{ 130238106Sdes if(!w) return; 131238106Sdes if(w->timer) 132238106Sdes comm_timer_delete(w->timer); 133238106Sdes free(w); 134238106Sdes} 135238106Sdes 136238106Sdes/** 137238106Sdes * Pick random outgoing-interface of that family, and bind it. 138238106Sdes * port set to 0 so OS picks a port number for us. 139238106Sdes * if it is the ANY address, do not bind. 140238106Sdes * @param w: tcp structure with destination address. 141238106Sdes * @param s: socket fd. 142238106Sdes * @return false on error, socket closed. 143238106Sdes */ 144238106Sdesstatic int 145238106Sdespick_outgoing_tcp(struct waiting_tcp* w, int s) 146238106Sdes{ 147238106Sdes struct port_if* pi = NULL; 148238106Sdes int num; 149238106Sdes#ifdef INET6 150238106Sdes if(addr_is_ip6(&w->addr, w->addrlen)) 151238106Sdes num = w->outnet->num_ip6; 152238106Sdes else 153238106Sdes#endif 154238106Sdes num = w->outnet->num_ip4; 155238106Sdes if(num == 0) { 156238106Sdes log_err("no TCP outgoing interfaces of family"); 157238106Sdes log_addr(VERB_OPS, "for addr", &w->addr, w->addrlen); 158238106Sdes#ifndef USE_WINSOCK 159238106Sdes close(s); 160238106Sdes#else 161238106Sdes closesocket(s); 162238106Sdes#endif 163238106Sdes return 0; 164238106Sdes } 165238106Sdes#ifdef INET6 166238106Sdes if(addr_is_ip6(&w->addr, w->addrlen)) 167238106Sdes pi = &w->outnet->ip6_ifs[ub_random_max(w->outnet->rnd, num)]; 168238106Sdes else 169238106Sdes#endif 170238106Sdes pi = &w->outnet->ip4_ifs[ub_random_max(w->outnet->rnd, num)]; 171238106Sdes log_assert(pi); 172238106Sdes if(addr_is_any(&pi->addr, pi->addrlen)) { 173238106Sdes /* binding to the ANY interface is for listening sockets */ 174238106Sdes return 1; 175238106Sdes } 176238106Sdes /* set port to 0 */ 177238106Sdes if(addr_is_ip6(&pi->addr, pi->addrlen)) 178238106Sdes ((struct sockaddr_in6*)&pi->addr)->sin6_port = 0; 179238106Sdes else ((struct sockaddr_in*)&pi->addr)->sin_port = 0; 180238106Sdes if(bind(s, (struct sockaddr*)&pi->addr, pi->addrlen) != 0) { 181238106Sdes#ifndef USE_WINSOCK 182238106Sdes log_err("outgoing tcp: bind: %s", strerror(errno)); 183238106Sdes close(s); 184238106Sdes#else 185238106Sdes log_err("outgoing tcp: bind: %s", 186238106Sdes wsa_strerror(WSAGetLastError())); 187238106Sdes closesocket(s); 188238106Sdes#endif 189238106Sdes return 0; 190238106Sdes } 191238106Sdes log_addr(VERB_ALGO, "tcp bound to src", &pi->addr, pi->addrlen); 192238106Sdes return 1; 193238106Sdes} 194238106Sdes 195238106Sdes/** use next free buffer to service a tcp query */ 196238106Sdesstatic int 197238106Sdesoutnet_tcp_take_into_use(struct waiting_tcp* w, uint8_t* pkt, size_t pkt_len) 198238106Sdes{ 199238106Sdes struct pending_tcp* pend = w->outnet->tcp_free; 200238106Sdes int s; 201238106Sdes log_assert(pend); 202238106Sdes log_assert(pkt); 203238106Sdes log_assert(w->addrlen > 0); 204238106Sdes /* open socket */ 205238106Sdes#ifdef INET6 206238106Sdes if(addr_is_ip6(&w->addr, w->addrlen)) 207238106Sdes s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP); 208238106Sdes else 209238106Sdes#endif 210238106Sdes s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); 211238106Sdes if(s == -1) { 212238106Sdes#ifndef USE_WINSOCK 213238106Sdes log_err("outgoing tcp: socket: %s", strerror(errno)); 214238106Sdes#else 215238106Sdes log_err("outgoing tcp: socket: %s", 216238106Sdes wsa_strerror(WSAGetLastError())); 217238106Sdes#endif 218238106Sdes log_addr(0, "failed address", &w->addr, w->addrlen); 219238106Sdes return 0; 220238106Sdes } 221238106Sdes if(!pick_outgoing_tcp(w, s)) 222238106Sdes return 0; 223238106Sdes 224238106Sdes fd_set_nonblock(s); 225238106Sdes if(connect(s, (struct sockaddr*)&w->addr, w->addrlen) == -1) { 226238106Sdes#ifndef USE_WINSOCK 227238106Sdes#ifdef EINPROGRESS 228238106Sdes if(errno != EINPROGRESS) { 229238106Sdes#else 230238106Sdes if(1) { 231238106Sdes#endif 232238106Sdes if(tcp_connect_errno_needs_log( 233238106Sdes (struct sockaddr*)&w->addr, w->addrlen)) 234238106Sdes log_err("outgoing tcp: connect: %s", 235238106Sdes strerror(errno)); 236238106Sdes close(s); 237238106Sdes#else /* USE_WINSOCK */ 238238106Sdes if(WSAGetLastError() != WSAEINPROGRESS && 239238106Sdes WSAGetLastError() != WSAEWOULDBLOCK) { 240238106Sdes closesocket(s); 241238106Sdes#endif 242238106Sdes log_addr(0, "failed address", &w->addr, w->addrlen); 243238106Sdes return 0; 244238106Sdes } 245238106Sdes } 246238106Sdes if(w->outnet->sslctx && w->ssl_upstream) { 247238106Sdes pend->c->ssl = outgoing_ssl_fd(w->outnet->sslctx, s); 248238106Sdes if(!pend->c->ssl) { 249238106Sdes pend->c->fd = s; 250238106Sdes comm_point_close(pend->c); 251238106Sdes return 0; 252238106Sdes } 253238106Sdes#ifdef USE_WINSOCK 254238106Sdes comm_point_tcp_win_bio_cb(pend->c, pend->c->ssl); 255238106Sdes#endif 256238106Sdes pend->c->ssl_shake_state = comm_ssl_shake_write; 257238106Sdes } 258238106Sdes w->pkt = NULL; 259238106Sdes w->next_waiting = (void*)pend; 260238106Sdes pend->id = LDNS_ID_WIRE(pkt); 261238106Sdes w->outnet->tcp_free = pend->next_free; 262238106Sdes pend->next_free = NULL; 263238106Sdes pend->query = w; 264238106Sdes pend->c->repinfo.addrlen = w->addrlen; 265238106Sdes memcpy(&pend->c->repinfo.addr, &w->addr, w->addrlen); 266238106Sdes ldns_buffer_clear(pend->c->buffer); 267238106Sdes ldns_buffer_write(pend->c->buffer, pkt, pkt_len); 268238106Sdes ldns_buffer_flip(pend->c->buffer); 269238106Sdes pend->c->tcp_is_reading = 0; 270238106Sdes pend->c->tcp_byte_count = 0; 271238106Sdes comm_point_start_listening(pend->c, s, -1); 272238106Sdes return 1; 273238106Sdes} 274238106Sdes 275238106Sdes/** see if buffers can be used to service TCP queries */ 276238106Sdesstatic void 277238106Sdesuse_free_buffer(struct outside_network* outnet) 278238106Sdes{ 279238106Sdes struct waiting_tcp* w; 280238106Sdes while(outnet->tcp_free && outnet->tcp_wait_first 281238106Sdes && !outnet->want_to_quit) { 282238106Sdes w = outnet->tcp_wait_first; 283238106Sdes outnet->tcp_wait_first = w->next_waiting; 284238106Sdes if(outnet->tcp_wait_last == w) 285238106Sdes outnet->tcp_wait_last = NULL; 286238106Sdes if(!outnet_tcp_take_into_use(w, w->pkt, w->pkt_len)) { 287238106Sdes comm_point_callback_t* cb = w->cb; 288238106Sdes void* cb_arg = w->cb_arg; 289238106Sdes waiting_tcp_delete(w); 290238106Sdes fptr_ok(fptr_whitelist_pending_tcp(cb)); 291238106Sdes (void)(*cb)(NULL, cb_arg, NETEVENT_CLOSED, NULL); 292238106Sdes } 293238106Sdes } 294238106Sdes} 295238106Sdes 296238106Sdes/** decomission a tcp buffer, closes commpoint and frees waiting_tcp entry */ 297238106Sdesstatic void 298238106Sdesdecomission_pending_tcp(struct outside_network* outnet, 299238106Sdes struct pending_tcp* pend) 300238106Sdes{ 301238106Sdes if(pend->c->ssl) { 302249141Sdes#ifdef HAVE_SSL 303238106Sdes SSL_shutdown(pend->c->ssl); 304238106Sdes SSL_free(pend->c->ssl); 305238106Sdes pend->c->ssl = NULL; 306249141Sdes#endif 307238106Sdes } 308238106Sdes comm_point_close(pend->c); 309238106Sdes pend->next_free = outnet->tcp_free; 310238106Sdes outnet->tcp_free = pend; 311238106Sdes waiting_tcp_delete(pend->query); 312238106Sdes pend->query = NULL; 313238106Sdes use_free_buffer(outnet); 314238106Sdes} 315238106Sdes 316238106Sdesint 317238106Sdesoutnet_tcp_cb(struct comm_point* c, void* arg, int error, 318238106Sdes struct comm_reply *reply_info) 319238106Sdes{ 320238106Sdes struct pending_tcp* pend = (struct pending_tcp*)arg; 321238106Sdes struct outside_network* outnet = pend->query->outnet; 322238106Sdes verbose(VERB_ALGO, "outnettcp cb"); 323238106Sdes if(error != NETEVENT_NOERROR) { 324238106Sdes verbose(VERB_QUERY, "outnettcp got tcp error %d", error); 325238106Sdes /* pass error below and exit */ 326238106Sdes } else { 327238106Sdes /* check ID */ 328238106Sdes if(ldns_buffer_limit(c->buffer) < sizeof(uint16_t) || 329238106Sdes LDNS_ID_WIRE(ldns_buffer_begin(c->buffer))!=pend->id) { 330238106Sdes log_addr(VERB_QUERY, 331238106Sdes "outnettcp: bad ID in reply, from:", 332238106Sdes &pend->query->addr, pend->query->addrlen); 333238106Sdes error = NETEVENT_CLOSED; 334238106Sdes } 335238106Sdes } 336238106Sdes fptr_ok(fptr_whitelist_pending_tcp(pend->query->cb)); 337238106Sdes (void)(*pend->query->cb)(c, pend->query->cb_arg, error, reply_info); 338238106Sdes decomission_pending_tcp(outnet, pend); 339238106Sdes return 0; 340238106Sdes} 341238106Sdes 342238106Sdes/** lower use count on pc, see if it can be closed */ 343238106Sdesstatic void 344238106Sdesportcomm_loweruse(struct outside_network* outnet, struct port_comm* pc) 345238106Sdes{ 346238106Sdes struct port_if* pif; 347238106Sdes pc->num_outstanding--; 348238106Sdes if(pc->num_outstanding > 0) { 349238106Sdes return; 350238106Sdes } 351238106Sdes /* close it and replace in unused list */ 352238106Sdes verbose(VERB_ALGO, "close of port %d", pc->number); 353238106Sdes comm_point_close(pc->cp); 354238106Sdes pif = pc->pif; 355238106Sdes log_assert(pif->inuse > 0); 356238106Sdes pif->avail_ports[pif->avail_total - pif->inuse] = pc->number; 357238106Sdes pif->inuse--; 358238106Sdes pif->out[pc->index] = pif->out[pif->inuse]; 359238106Sdes pif->out[pc->index]->index = pc->index; 360238106Sdes pc->next = outnet->unused_fds; 361238106Sdes outnet->unused_fds = pc; 362238106Sdes} 363238106Sdes 364238106Sdes/** try to send waiting UDP queries */ 365238106Sdesstatic void 366238106Sdesoutnet_send_wait_udp(struct outside_network* outnet) 367238106Sdes{ 368238106Sdes struct pending* pend; 369238106Sdes /* process waiting queries */ 370238106Sdes while(outnet->udp_wait_first && outnet->unused_fds 371238106Sdes && !outnet->want_to_quit) { 372238106Sdes pend = outnet->udp_wait_first; 373238106Sdes outnet->udp_wait_first = pend->next_waiting; 374238106Sdes if(!pend->next_waiting) outnet->udp_wait_last = NULL; 375238106Sdes ldns_buffer_clear(outnet->udp_buff); 376238106Sdes ldns_buffer_write(outnet->udp_buff, pend->pkt, pend->pkt_len); 377238106Sdes ldns_buffer_flip(outnet->udp_buff); 378238106Sdes free(pend->pkt); /* freeing now makes get_mem correct */ 379238106Sdes pend->pkt = NULL; 380238106Sdes pend->pkt_len = 0; 381238106Sdes if(!randomize_and_send_udp(outnet, pend, outnet->udp_buff, 382238106Sdes pend->timeout)) { 383238106Sdes /* callback error on pending */ 384238106Sdes fptr_ok(fptr_whitelist_pending_udp(pend->cb)); 385238106Sdes (void)(*pend->cb)(outnet->unused_fds->cp, pend->cb_arg, 386238106Sdes NETEVENT_CLOSED, NULL); 387238106Sdes pending_delete(outnet, pend); 388238106Sdes } 389238106Sdes } 390238106Sdes} 391238106Sdes 392238106Sdesint 393238106Sdesoutnet_udp_cb(struct comm_point* c, void* arg, int error, 394238106Sdes struct comm_reply *reply_info) 395238106Sdes{ 396238106Sdes struct outside_network* outnet = (struct outside_network*)arg; 397238106Sdes struct pending key; 398238106Sdes struct pending* p; 399238106Sdes verbose(VERB_ALGO, "answer cb"); 400238106Sdes 401238106Sdes if(error != NETEVENT_NOERROR) { 402238106Sdes verbose(VERB_QUERY, "outnetudp got udp error %d", error); 403238106Sdes return 0; 404238106Sdes } 405238106Sdes if(ldns_buffer_limit(c->buffer) < LDNS_HEADER_SIZE) { 406238106Sdes verbose(VERB_QUERY, "outnetudp udp too short"); 407238106Sdes return 0; 408238106Sdes } 409238106Sdes log_assert(reply_info); 410238106Sdes 411238106Sdes /* setup lookup key */ 412238106Sdes key.id = (unsigned)LDNS_ID_WIRE(ldns_buffer_begin(c->buffer)); 413238106Sdes memcpy(&key.addr, &reply_info->addr, reply_info->addrlen); 414238106Sdes key.addrlen = reply_info->addrlen; 415238106Sdes verbose(VERB_ALGO, "Incoming reply id = %4.4x", key.id); 416238106Sdes log_addr(VERB_ALGO, "Incoming reply addr =", 417238106Sdes &reply_info->addr, reply_info->addrlen); 418238106Sdes 419238106Sdes /* find it, see if this thing is a valid query response */ 420238106Sdes verbose(VERB_ALGO, "lookup size is %d entries", (int)outnet->pending->count); 421238106Sdes p = (struct pending*)rbtree_search(outnet->pending, &key); 422238106Sdes if(!p) { 423238106Sdes verbose(VERB_QUERY, "received unwanted or unsolicited udp reply dropped."); 424238106Sdes log_buf(VERB_ALGO, "dropped message", c->buffer); 425238106Sdes outnet->unwanted_replies++; 426238106Sdes if(outnet->unwanted_threshold && ++outnet->unwanted_total 427238106Sdes >= outnet->unwanted_threshold) { 428238106Sdes log_warn("unwanted reply total reached threshold (%u)" 429238106Sdes " you may be under attack." 430238106Sdes " defensive action: clearing the cache", 431238106Sdes (unsigned)outnet->unwanted_threshold); 432238106Sdes fptr_ok(fptr_whitelist_alloc_cleanup( 433238106Sdes outnet->unwanted_action)); 434238106Sdes (*outnet->unwanted_action)(outnet->unwanted_param); 435238106Sdes outnet->unwanted_total = 0; 436238106Sdes } 437238106Sdes return 0; 438238106Sdes } 439238106Sdes 440238106Sdes verbose(VERB_ALGO, "received udp reply."); 441238106Sdes log_buf(VERB_ALGO, "udp message", c->buffer); 442238106Sdes if(p->pc->cp != c) { 443238106Sdes verbose(VERB_QUERY, "received reply id,addr on wrong port. " 444238106Sdes "dropped."); 445238106Sdes outnet->unwanted_replies++; 446238106Sdes if(outnet->unwanted_threshold && ++outnet->unwanted_total 447238106Sdes >= outnet->unwanted_threshold) { 448238106Sdes log_warn("unwanted reply total reached threshold (%u)" 449238106Sdes " you may be under attack." 450238106Sdes " defensive action: clearing the cache", 451238106Sdes (unsigned)outnet->unwanted_threshold); 452238106Sdes fptr_ok(fptr_whitelist_alloc_cleanup( 453238106Sdes outnet->unwanted_action)); 454238106Sdes (*outnet->unwanted_action)(outnet->unwanted_param); 455238106Sdes outnet->unwanted_total = 0; 456238106Sdes } 457238106Sdes return 0; 458238106Sdes } 459238106Sdes comm_timer_disable(p->timer); 460238106Sdes verbose(VERB_ALGO, "outnet handle udp reply"); 461238106Sdes /* delete from tree first in case callback creates a retry */ 462238106Sdes (void)rbtree_delete(outnet->pending, p->node.key); 463238106Sdes fptr_ok(fptr_whitelist_pending_udp(p->cb)); 464238106Sdes (void)(*p->cb)(p->pc->cp, p->cb_arg, NETEVENT_NOERROR, reply_info); 465238106Sdes portcomm_loweruse(outnet, p->pc); 466238106Sdes pending_delete(NULL, p); 467238106Sdes outnet_send_wait_udp(outnet); 468238106Sdes return 0; 469238106Sdes} 470238106Sdes 471238106Sdes/** calculate number of ip4 and ip6 interfaces*/ 472238106Sdesstatic void 473238106Sdescalc_num46(char** ifs, int num_ifs, int do_ip4, int do_ip6, 474238106Sdes int* num_ip4, int* num_ip6) 475238106Sdes{ 476238106Sdes int i; 477238106Sdes *num_ip4 = 0; 478238106Sdes *num_ip6 = 0; 479238106Sdes if(num_ifs <= 0) { 480238106Sdes if(do_ip4) 481238106Sdes *num_ip4 = 1; 482238106Sdes if(do_ip6) 483238106Sdes *num_ip6 = 1; 484238106Sdes return; 485238106Sdes } 486238106Sdes for(i=0; i<num_ifs; i++) 487238106Sdes { 488238106Sdes if(str_is_ip6(ifs[i])) { 489238106Sdes if(do_ip6) 490238106Sdes (*num_ip6)++; 491238106Sdes } else { 492238106Sdes if(do_ip4) 493238106Sdes (*num_ip4)++; 494238106Sdes } 495238106Sdes } 496238106Sdes 497238106Sdes} 498238106Sdes 499238106Sdesvoid 500238106Sdespending_udp_timer_cb(void *arg) 501238106Sdes{ 502238106Sdes struct pending* p = (struct pending*)arg; 503238106Sdes struct outside_network* outnet = p->outnet; 504238106Sdes /* it timed out */ 505238106Sdes verbose(VERB_ALGO, "timeout udp"); 506238106Sdes fptr_ok(fptr_whitelist_pending_udp(p->cb)); 507238106Sdes (void)(*p->cb)(p->pc->cp, p->cb_arg, NETEVENT_TIMEOUT, NULL); 508238106Sdes portcomm_loweruse(outnet, p->pc); 509238106Sdes pending_delete(outnet, p); 510238106Sdes outnet_send_wait_udp(outnet); 511238106Sdes} 512238106Sdes 513238106Sdes/** create pending_tcp buffers */ 514238106Sdesstatic int 515238106Sdescreate_pending_tcp(struct outside_network* outnet, size_t bufsize) 516238106Sdes{ 517238106Sdes size_t i; 518238106Sdes if(outnet->num_tcp == 0) 519238106Sdes return 1; /* no tcp needed, nothing to do */ 520238106Sdes if(!(outnet->tcp_conns = (struct pending_tcp **)calloc( 521238106Sdes outnet->num_tcp, sizeof(struct pending_tcp*)))) 522238106Sdes return 0; 523238106Sdes for(i=0; i<outnet->num_tcp; i++) { 524238106Sdes if(!(outnet->tcp_conns[i] = (struct pending_tcp*)calloc(1, 525238106Sdes sizeof(struct pending_tcp)))) 526238106Sdes return 0; 527238106Sdes outnet->tcp_conns[i]->next_free = outnet->tcp_free; 528238106Sdes outnet->tcp_free = outnet->tcp_conns[i]; 529238106Sdes outnet->tcp_conns[i]->c = comm_point_create_tcp_out( 530238106Sdes outnet->base, bufsize, outnet_tcp_cb, 531238106Sdes outnet->tcp_conns[i]); 532238106Sdes if(!outnet->tcp_conns[i]->c) 533238106Sdes return 0; 534238106Sdes } 535238106Sdes return 1; 536238106Sdes} 537238106Sdes 538238106Sdes/** setup an outgoing interface, ready address */ 539238106Sdesstatic int setup_if(struct port_if* pif, const char* addrstr, 540238106Sdes int* avail, int numavail, size_t numfd) 541238106Sdes{ 542238106Sdes pif->avail_total = numavail; 543238106Sdes pif->avail_ports = (int*)memdup(avail, (size_t)numavail*sizeof(int)); 544238106Sdes if(!pif->avail_ports) 545238106Sdes return 0; 546238106Sdes if(!ipstrtoaddr(addrstr, UNBOUND_DNS_PORT, &pif->addr, &pif->addrlen)) 547238106Sdes return 0; 548238106Sdes pif->maxout = (int)numfd; 549238106Sdes pif->inuse = 0; 550238106Sdes pif->out = (struct port_comm**)calloc(numfd, 551238106Sdes sizeof(struct port_comm*)); 552238106Sdes if(!pif->out) 553238106Sdes return 0; 554238106Sdes return 1; 555238106Sdes} 556238106Sdes 557238106Sdesstruct outside_network* 558238106Sdesoutside_network_create(struct comm_base *base, size_t bufsize, 559238106Sdes size_t num_ports, char** ifs, int num_ifs, int do_ip4, 560238106Sdes int do_ip6, size_t num_tcp, struct infra_cache* infra, 561238106Sdes struct ub_randstate* rnd, int use_caps_for_id, int* availports, 562238106Sdes int numavailports, size_t unwanted_threshold, 563238106Sdes void (*unwanted_action)(void*), void* unwanted_param, int do_udp, 564238106Sdes void* sslctx) 565238106Sdes{ 566238106Sdes struct outside_network* outnet = (struct outside_network*) 567238106Sdes calloc(1, sizeof(struct outside_network)); 568238106Sdes size_t k; 569238106Sdes if(!outnet) { 570238106Sdes log_err("malloc failed"); 571238106Sdes return NULL; 572238106Sdes } 573238106Sdes comm_base_timept(base, &outnet->now_secs, &outnet->now_tv); 574238106Sdes outnet->base = base; 575238106Sdes outnet->num_tcp = num_tcp; 576238106Sdes outnet->infra = infra; 577238106Sdes outnet->rnd = rnd; 578238106Sdes outnet->sslctx = sslctx; 579238106Sdes outnet->svcd_overhead = 0; 580238106Sdes outnet->want_to_quit = 0; 581238106Sdes outnet->unwanted_threshold = unwanted_threshold; 582238106Sdes outnet->unwanted_action = unwanted_action; 583238106Sdes outnet->unwanted_param = unwanted_param; 584238106Sdes outnet->use_caps_for_id = use_caps_for_id; 585238106Sdes outnet->do_udp = do_udp; 586238106Sdes if(numavailports == 0) { 587238106Sdes log_err("no outgoing ports available"); 588238106Sdes outside_network_delete(outnet); 589238106Sdes return NULL; 590238106Sdes } 591238106Sdes#ifndef INET6 592238106Sdes do_ip6 = 0; 593238106Sdes#endif 594238106Sdes calc_num46(ifs, num_ifs, do_ip4, do_ip6, 595238106Sdes &outnet->num_ip4, &outnet->num_ip6); 596238106Sdes if(outnet->num_ip4 != 0) { 597238106Sdes if(!(outnet->ip4_ifs = (struct port_if*)calloc( 598238106Sdes (size_t)outnet->num_ip4, sizeof(struct port_if)))) { 599238106Sdes log_err("malloc failed"); 600238106Sdes outside_network_delete(outnet); 601238106Sdes return NULL; 602238106Sdes } 603238106Sdes } 604238106Sdes if(outnet->num_ip6 != 0) { 605238106Sdes if(!(outnet->ip6_ifs = (struct port_if*)calloc( 606238106Sdes (size_t)outnet->num_ip6, sizeof(struct port_if)))) { 607238106Sdes log_err("malloc failed"); 608238106Sdes outside_network_delete(outnet); 609238106Sdes return NULL; 610238106Sdes } 611238106Sdes } 612238106Sdes if( !(outnet->udp_buff = ldns_buffer_new(bufsize)) || 613238106Sdes !(outnet->pending = rbtree_create(pending_cmp)) || 614238106Sdes !(outnet->serviced = rbtree_create(serviced_cmp)) || 615238106Sdes !create_pending_tcp(outnet, bufsize)) { 616238106Sdes log_err("malloc failed"); 617238106Sdes outside_network_delete(outnet); 618238106Sdes return NULL; 619238106Sdes } 620238106Sdes 621238106Sdes /* allocate commpoints */ 622238106Sdes for(k=0; k<num_ports; k++) { 623238106Sdes struct port_comm* pc; 624238106Sdes pc = (struct port_comm*)calloc(1, sizeof(*pc)); 625238106Sdes if(!pc) { 626238106Sdes log_err("malloc failed"); 627238106Sdes outside_network_delete(outnet); 628238106Sdes return NULL; 629238106Sdes } 630238106Sdes pc->cp = comm_point_create_udp(outnet->base, -1, 631238106Sdes outnet->udp_buff, outnet_udp_cb, outnet); 632238106Sdes if(!pc->cp) { 633238106Sdes log_err("malloc failed"); 634238106Sdes free(pc); 635238106Sdes outside_network_delete(outnet); 636238106Sdes return NULL; 637238106Sdes } 638238106Sdes pc->next = outnet->unused_fds; 639238106Sdes outnet->unused_fds = pc; 640238106Sdes } 641238106Sdes 642238106Sdes /* allocate interfaces */ 643238106Sdes if(num_ifs == 0) { 644238106Sdes if(do_ip4 && !setup_if(&outnet->ip4_ifs[0], "0.0.0.0", 645238106Sdes availports, numavailports, num_ports)) { 646238106Sdes log_err("malloc failed"); 647238106Sdes outside_network_delete(outnet); 648238106Sdes return NULL; 649238106Sdes } 650238106Sdes if(do_ip6 && !setup_if(&outnet->ip6_ifs[0], "::", 651238106Sdes availports, numavailports, num_ports)) { 652238106Sdes log_err("malloc failed"); 653238106Sdes outside_network_delete(outnet); 654238106Sdes return NULL; 655238106Sdes } 656238106Sdes } else { 657238106Sdes size_t done_4 = 0, done_6 = 0; 658238106Sdes int i; 659238106Sdes for(i=0; i<num_ifs; i++) { 660238106Sdes if(str_is_ip6(ifs[i]) && do_ip6) { 661238106Sdes if(!setup_if(&outnet->ip6_ifs[done_6], ifs[i], 662238106Sdes availports, numavailports, num_ports)){ 663238106Sdes log_err("malloc failed"); 664238106Sdes outside_network_delete(outnet); 665238106Sdes return NULL; 666238106Sdes } 667238106Sdes done_6++; 668238106Sdes } 669238106Sdes if(!str_is_ip6(ifs[i]) && do_ip4) { 670238106Sdes if(!setup_if(&outnet->ip4_ifs[done_4], ifs[i], 671238106Sdes availports, numavailports, num_ports)){ 672238106Sdes log_err("malloc failed"); 673238106Sdes outside_network_delete(outnet); 674238106Sdes return NULL; 675238106Sdes } 676238106Sdes done_4++; 677238106Sdes } 678238106Sdes } 679238106Sdes } 680238106Sdes return outnet; 681238106Sdes} 682238106Sdes 683238106Sdes/** helper pending delete */ 684238106Sdesstatic void 685238106Sdespending_node_del(rbnode_t* node, void* arg) 686238106Sdes{ 687238106Sdes struct pending* pend = (struct pending*)node; 688238106Sdes struct outside_network* outnet = (struct outside_network*)arg; 689238106Sdes pending_delete(outnet, pend); 690238106Sdes} 691238106Sdes 692238106Sdes/** helper serviced delete */ 693238106Sdesstatic void 694238106Sdesserviced_node_del(rbnode_t* node, void* ATTR_UNUSED(arg)) 695238106Sdes{ 696238106Sdes struct serviced_query* sq = (struct serviced_query*)node; 697238106Sdes struct service_callback* p = sq->cblist, *np; 698238106Sdes free(sq->qbuf); 699238106Sdes free(sq->zone); 700238106Sdes while(p) { 701238106Sdes np = p->next; 702238106Sdes free(p); 703238106Sdes p = np; 704238106Sdes } 705238106Sdes free(sq); 706238106Sdes} 707238106Sdes 708238106Sdesvoid 709238106Sdesoutside_network_quit_prepare(struct outside_network* outnet) 710238106Sdes{ 711238106Sdes if(!outnet) 712238106Sdes return; 713238106Sdes /* prevent queued items from being sent */ 714238106Sdes outnet->want_to_quit = 1; 715238106Sdes} 716238106Sdes 717238106Sdesvoid 718238106Sdesoutside_network_delete(struct outside_network* outnet) 719238106Sdes{ 720238106Sdes if(!outnet) 721238106Sdes return; 722238106Sdes outnet->want_to_quit = 1; 723238106Sdes /* check every element, since we can be called on malloc error */ 724238106Sdes if(outnet->pending) { 725238106Sdes /* free pending elements, but do no unlink from tree. */ 726238106Sdes traverse_postorder(outnet->pending, pending_node_del, NULL); 727238106Sdes free(outnet->pending); 728238106Sdes } 729238106Sdes if(outnet->serviced) { 730238106Sdes traverse_postorder(outnet->serviced, serviced_node_del, NULL); 731238106Sdes free(outnet->serviced); 732238106Sdes } 733238106Sdes if(outnet->udp_buff) 734238106Sdes ldns_buffer_free(outnet->udp_buff); 735238106Sdes if(outnet->unused_fds) { 736238106Sdes struct port_comm* p = outnet->unused_fds, *np; 737238106Sdes while(p) { 738238106Sdes np = p->next; 739238106Sdes comm_point_delete(p->cp); 740238106Sdes free(p); 741238106Sdes p = np; 742238106Sdes } 743238106Sdes outnet->unused_fds = NULL; 744238106Sdes } 745238106Sdes if(outnet->ip4_ifs) { 746238106Sdes int i, k; 747238106Sdes for(i=0; i<outnet->num_ip4; i++) { 748238106Sdes for(k=0; k<outnet->ip4_ifs[i].inuse; k++) { 749238106Sdes struct port_comm* pc = outnet->ip4_ifs[i]. 750238106Sdes out[k]; 751238106Sdes comm_point_delete(pc->cp); 752238106Sdes free(pc); 753238106Sdes } 754238106Sdes free(outnet->ip4_ifs[i].avail_ports); 755238106Sdes free(outnet->ip4_ifs[i].out); 756238106Sdes } 757238106Sdes free(outnet->ip4_ifs); 758238106Sdes } 759238106Sdes if(outnet->ip6_ifs) { 760238106Sdes int i, k; 761238106Sdes for(i=0; i<outnet->num_ip6; i++) { 762238106Sdes for(k=0; k<outnet->ip6_ifs[i].inuse; k++) { 763238106Sdes struct port_comm* pc = outnet->ip6_ifs[i]. 764238106Sdes out[k]; 765238106Sdes comm_point_delete(pc->cp); 766238106Sdes free(pc); 767238106Sdes } 768238106Sdes free(outnet->ip6_ifs[i].avail_ports); 769238106Sdes free(outnet->ip6_ifs[i].out); 770238106Sdes } 771238106Sdes free(outnet->ip6_ifs); 772238106Sdes } 773238106Sdes if(outnet->tcp_conns) { 774238106Sdes size_t i; 775238106Sdes for(i=0; i<outnet->num_tcp; i++) 776238106Sdes if(outnet->tcp_conns[i]) { 777238106Sdes comm_point_delete(outnet->tcp_conns[i]->c); 778238106Sdes waiting_tcp_delete(outnet->tcp_conns[i]->query); 779238106Sdes free(outnet->tcp_conns[i]); 780238106Sdes } 781238106Sdes free(outnet->tcp_conns); 782238106Sdes } 783238106Sdes if(outnet->tcp_wait_first) { 784238106Sdes struct waiting_tcp* p = outnet->tcp_wait_first, *np; 785238106Sdes while(p) { 786238106Sdes np = p->next_waiting; 787238106Sdes waiting_tcp_delete(p); 788238106Sdes p = np; 789238106Sdes } 790238106Sdes } 791238106Sdes if(outnet->udp_wait_first) { 792238106Sdes struct pending* p = outnet->udp_wait_first, *np; 793238106Sdes while(p) { 794238106Sdes np = p->next_waiting; 795238106Sdes pending_delete(NULL, p); 796238106Sdes p = np; 797238106Sdes } 798238106Sdes } 799238106Sdes free(outnet); 800238106Sdes} 801238106Sdes 802238106Sdesvoid 803238106Sdespending_delete(struct outside_network* outnet, struct pending* p) 804238106Sdes{ 805238106Sdes if(!p) 806238106Sdes return; 807238106Sdes if(outnet && outnet->udp_wait_first && 808238106Sdes (p->next_waiting || p == outnet->udp_wait_last) ) { 809238106Sdes /* delete from waiting list, if it is in the waiting list */ 810238106Sdes struct pending* prev = NULL, *x = outnet->udp_wait_first; 811238106Sdes while(x && x != p) { 812238106Sdes prev = x; 813238106Sdes x = x->next_waiting; 814238106Sdes } 815238106Sdes if(x) { 816238106Sdes log_assert(x == p); 817238106Sdes if(prev) 818238106Sdes prev->next_waiting = p->next_waiting; 819238106Sdes else outnet->udp_wait_first = p->next_waiting; 820238106Sdes if(outnet->udp_wait_last == p) 821238106Sdes outnet->udp_wait_last = prev; 822238106Sdes } 823238106Sdes } 824238106Sdes if(outnet) { 825238106Sdes (void)rbtree_delete(outnet->pending, p->node.key); 826238106Sdes } 827238106Sdes if(p->timer) 828238106Sdes comm_timer_delete(p->timer); 829238106Sdes free(p->pkt); 830238106Sdes free(p); 831238106Sdes} 832238106Sdes 833238106Sdes/** 834238106Sdes * Try to open a UDP socket for outgoing communication. 835238106Sdes * Sets sockets options as needed. 836238106Sdes * @param addr: socket address. 837238106Sdes * @param addrlen: length of address. 838238106Sdes * @param port: port override for addr. 839238106Sdes * @param inuse: if -1 is returned, this bool means the port was in use. 840238106Sdes * @return fd or -1 841238106Sdes */ 842238106Sdesstatic int 843238106Sdesudp_sockport(struct sockaddr_storage* addr, socklen_t addrlen, int port, 844238106Sdes int* inuse) 845238106Sdes{ 846238106Sdes int fd, noproto; 847238106Sdes if(addr_is_ip6(addr, addrlen)) { 848238106Sdes struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 849238106Sdes sa->sin6_port = (in_port_t)htons((uint16_t)port); 850238106Sdes fd = create_udp_sock(AF_INET6, SOCK_DGRAM, 851238106Sdes (struct sockaddr*)addr, addrlen, 1, inuse, &noproto, 852238106Sdes 0, 0); 853238106Sdes } else { 854238106Sdes struct sockaddr_in* sa = (struct sockaddr_in*)addr; 855238106Sdes sa->sin_port = (in_port_t)htons((uint16_t)port); 856238106Sdes fd = create_udp_sock(AF_INET, SOCK_DGRAM, 857238106Sdes (struct sockaddr*)addr, addrlen, 1, inuse, &noproto, 858238106Sdes 0, 0); 859238106Sdes } 860238106Sdes return fd; 861238106Sdes} 862238106Sdes 863238106Sdes/** Select random ID */ 864238106Sdesstatic int 865238106Sdesselect_id(struct outside_network* outnet, struct pending* pend, 866238106Sdes ldns_buffer* packet) 867238106Sdes{ 868238106Sdes int id_tries = 0; 869238106Sdes pend->id = ((unsigned)ub_random(outnet->rnd)>>8) & 0xffff; 870238106Sdes LDNS_ID_SET(ldns_buffer_begin(packet), pend->id); 871238106Sdes 872238106Sdes /* insert in tree */ 873238106Sdes pend->node.key = pend; 874238106Sdes while(!rbtree_insert(outnet->pending, &pend->node)) { 875238106Sdes /* change ID to avoid collision */ 876238106Sdes pend->id = ((unsigned)ub_random(outnet->rnd)>>8) & 0xffff; 877238106Sdes LDNS_ID_SET(ldns_buffer_begin(packet), pend->id); 878238106Sdes id_tries++; 879238106Sdes if(id_tries == MAX_ID_RETRY) { 880238106Sdes pend->id=99999; /* non existant ID */ 881238106Sdes log_err("failed to generate unique ID, drop msg"); 882238106Sdes return 0; 883238106Sdes } 884238106Sdes } 885238106Sdes verbose(VERB_ALGO, "inserted new pending reply id=%4.4x", pend->id); 886238106Sdes return 1; 887238106Sdes} 888238106Sdes 889238106Sdes/** Select random interface and port */ 890238106Sdesstatic int 891238106Sdesselect_ifport(struct outside_network* outnet, struct pending* pend, 892238106Sdes int num_if, struct port_if* ifs) 893238106Sdes{ 894238106Sdes int my_if, my_port, fd, portno, inuse, tries=0; 895238106Sdes struct port_if* pif; 896238106Sdes /* randomly select interface and port */ 897238106Sdes if(num_if == 0) { 898238106Sdes verbose(VERB_QUERY, "Need to send query but have no " 899238106Sdes "outgoing interfaces of that family"); 900238106Sdes return 0; 901238106Sdes } 902238106Sdes log_assert(outnet->unused_fds); 903238106Sdes tries = 0; 904238106Sdes while(1) { 905238106Sdes my_if = ub_random_max(outnet->rnd, num_if); 906238106Sdes pif = &ifs[my_if]; 907238106Sdes my_port = ub_random_max(outnet->rnd, pif->avail_total); 908238106Sdes if(my_port < pif->inuse) { 909238106Sdes /* port already open */ 910238106Sdes pend->pc = pif->out[my_port]; 911238106Sdes verbose(VERB_ALGO, "using UDP if=%d port=%d", 912238106Sdes my_if, pend->pc->number); 913238106Sdes break; 914238106Sdes } 915238106Sdes /* try to open new port, if fails, loop to try again */ 916238106Sdes log_assert(pif->inuse < pif->maxout); 917238106Sdes portno = pif->avail_ports[my_port - pif->inuse]; 918238106Sdes fd = udp_sockport(&pif->addr, pif->addrlen, portno, &inuse); 919238106Sdes if(fd == -1 && !inuse) { 920238106Sdes /* nonrecoverable error making socket */ 921238106Sdes return 0; 922238106Sdes } 923238106Sdes if(fd != -1) { 924238106Sdes verbose(VERB_ALGO, "opened UDP if=%d port=%d", 925238106Sdes my_if, portno); 926238106Sdes /* grab fd */ 927238106Sdes pend->pc = outnet->unused_fds; 928238106Sdes outnet->unused_fds = pend->pc->next; 929238106Sdes 930238106Sdes /* setup portcomm */ 931238106Sdes pend->pc->next = NULL; 932238106Sdes pend->pc->number = portno; 933238106Sdes pend->pc->pif = pif; 934238106Sdes pend->pc->index = pif->inuse; 935238106Sdes pend->pc->num_outstanding = 0; 936238106Sdes comm_point_start_listening(pend->pc->cp, fd, -1); 937238106Sdes 938238106Sdes /* grab port in interface */ 939238106Sdes pif->out[pif->inuse] = pend->pc; 940238106Sdes pif->avail_ports[my_port - pif->inuse] = 941238106Sdes pif->avail_ports[pif->avail_total-pif->inuse-1]; 942238106Sdes pif->inuse++; 943238106Sdes break; 944238106Sdes } 945238106Sdes /* failed, already in use */ 946238106Sdes verbose(VERB_QUERY, "port %d in use, trying another", portno); 947238106Sdes tries++; 948238106Sdes if(tries == MAX_PORT_RETRY) { 949238106Sdes log_err("failed to find an open port, drop msg"); 950238106Sdes return 0; 951238106Sdes } 952238106Sdes } 953238106Sdes log_assert(pend->pc); 954238106Sdes pend->pc->num_outstanding++; 955238106Sdes 956238106Sdes return 1; 957238106Sdes} 958238106Sdes 959238106Sdesstatic int 960238106Sdesrandomize_and_send_udp(struct outside_network* outnet, struct pending* pend, 961238106Sdes ldns_buffer* packet, int timeout) 962238106Sdes{ 963238106Sdes struct timeval tv; 964238106Sdes 965238106Sdes /* select id */ 966238106Sdes if(!select_id(outnet, pend, packet)) { 967238106Sdes return 0; 968238106Sdes } 969238106Sdes 970238106Sdes /* select src_if, port */ 971238106Sdes if(addr_is_ip6(&pend->addr, pend->addrlen)) { 972238106Sdes if(!select_ifport(outnet, pend, 973238106Sdes outnet->num_ip6, outnet->ip6_ifs)) 974238106Sdes return 0; 975238106Sdes } else { 976238106Sdes if(!select_ifport(outnet, pend, 977238106Sdes outnet->num_ip4, outnet->ip4_ifs)) 978238106Sdes return 0; 979238106Sdes } 980238106Sdes log_assert(pend->pc && pend->pc->cp); 981238106Sdes 982238106Sdes /* send it over the commlink */ 983238106Sdes if(!comm_point_send_udp_msg(pend->pc->cp, packet, 984238106Sdes (struct sockaddr*)&pend->addr, pend->addrlen)) { 985238106Sdes portcomm_loweruse(outnet, pend->pc); 986238106Sdes return 0; 987238106Sdes } 988238106Sdes 989238106Sdes /* system calls to set timeout after sending UDP to make roundtrip 990238106Sdes smaller. */ 991238106Sdes#ifndef S_SPLINT_S 992238106Sdes tv.tv_sec = timeout/1000; 993238106Sdes tv.tv_usec = (timeout%1000)*1000; 994238106Sdes#endif 995238106Sdes comm_timer_set(pend->timer, &tv); 996238106Sdes return 1; 997238106Sdes} 998238106Sdes 999238106Sdesstruct pending* 1000238106Sdespending_udp_query(struct outside_network* outnet, ldns_buffer* packet, 1001238106Sdes struct sockaddr_storage* addr, socklen_t addrlen, int timeout, 1002238106Sdes comm_point_callback_t* cb, void* cb_arg) 1003238106Sdes{ 1004238106Sdes struct pending* pend = (struct pending*)calloc(1, sizeof(*pend)); 1005238106Sdes if(!pend) return NULL; 1006238106Sdes pend->outnet = outnet; 1007238106Sdes pend->addrlen = addrlen; 1008238106Sdes memmove(&pend->addr, addr, addrlen); 1009238106Sdes pend->cb = cb; 1010238106Sdes pend->cb_arg = cb_arg; 1011238106Sdes pend->node.key = pend; 1012238106Sdes pend->timer = comm_timer_create(outnet->base, pending_udp_timer_cb, 1013238106Sdes pend); 1014238106Sdes if(!pend->timer) { 1015238106Sdes free(pend); 1016238106Sdes return NULL; 1017238106Sdes } 1018238106Sdes 1019238106Sdes if(outnet->unused_fds == NULL) { 1020238106Sdes /* no unused fd, cannot create a new port (randomly) */ 1021238106Sdes verbose(VERB_ALGO, "no fds available, udp query waiting"); 1022238106Sdes pend->timeout = timeout; 1023238106Sdes pend->pkt_len = ldns_buffer_limit(packet); 1024238106Sdes pend->pkt = (uint8_t*)memdup(ldns_buffer_begin(packet), 1025238106Sdes pend->pkt_len); 1026238106Sdes if(!pend->pkt) { 1027238106Sdes comm_timer_delete(pend->timer); 1028238106Sdes free(pend); 1029238106Sdes return NULL; 1030238106Sdes } 1031238106Sdes /* put at end of waiting list */ 1032238106Sdes if(outnet->udp_wait_last) 1033238106Sdes outnet->udp_wait_last->next_waiting = pend; 1034238106Sdes else 1035238106Sdes outnet->udp_wait_first = pend; 1036238106Sdes outnet->udp_wait_last = pend; 1037238106Sdes return pend; 1038238106Sdes } 1039238106Sdes if(!randomize_and_send_udp(outnet, pend, packet, timeout)) { 1040238106Sdes pending_delete(outnet, pend); 1041238106Sdes return NULL; 1042238106Sdes } 1043238106Sdes return pend; 1044238106Sdes} 1045238106Sdes 1046238106Sdesvoid 1047238106Sdesoutnet_tcptimer(void* arg) 1048238106Sdes{ 1049238106Sdes struct waiting_tcp* w = (struct waiting_tcp*)arg; 1050238106Sdes struct outside_network* outnet = w->outnet; 1051238106Sdes comm_point_callback_t* cb; 1052238106Sdes void* cb_arg; 1053238106Sdes if(w->pkt) { 1054238106Sdes /* it is on the waiting list */ 1055238106Sdes struct waiting_tcp* p=outnet->tcp_wait_first, *prev=NULL; 1056238106Sdes while(p) { 1057238106Sdes if(p == w) { 1058238106Sdes if(prev) prev->next_waiting = w->next_waiting; 1059238106Sdes else outnet->tcp_wait_first=w->next_waiting; 1060238106Sdes outnet->tcp_wait_last = prev; 1061238106Sdes break; 1062238106Sdes } 1063238106Sdes prev = p; 1064238106Sdes p=p->next_waiting; 1065238106Sdes } 1066238106Sdes } else { 1067238106Sdes /* it was in use */ 1068238106Sdes struct pending_tcp* pend=(struct pending_tcp*)w->next_waiting; 1069238106Sdes comm_point_close(pend->c); 1070238106Sdes pend->query = NULL; 1071238106Sdes pend->next_free = outnet->tcp_free; 1072238106Sdes outnet->tcp_free = pend; 1073238106Sdes } 1074238106Sdes cb = w->cb; 1075238106Sdes cb_arg = w->cb_arg; 1076238106Sdes waiting_tcp_delete(w); 1077238106Sdes fptr_ok(fptr_whitelist_pending_tcp(cb)); 1078238106Sdes (void)(*cb)(NULL, cb_arg, NETEVENT_TIMEOUT, NULL); 1079238106Sdes use_free_buffer(outnet); 1080238106Sdes} 1081238106Sdes 1082238106Sdesstruct waiting_tcp* 1083238106Sdespending_tcp_query(struct outside_network* outnet, ldns_buffer* packet, 1084238106Sdes struct sockaddr_storage* addr, socklen_t addrlen, int timeout, 1085238106Sdes comm_point_callback_t* callback, void* callback_arg, int ssl_upstream) 1086238106Sdes{ 1087238106Sdes struct pending_tcp* pend = outnet->tcp_free; 1088238106Sdes struct waiting_tcp* w; 1089238106Sdes struct timeval tv; 1090238106Sdes uint16_t id; 1091238106Sdes /* if no buffer is free allocate space to store query */ 1092238106Sdes w = (struct waiting_tcp*)malloc(sizeof(struct waiting_tcp) 1093238106Sdes + (pend?0:ldns_buffer_limit(packet))); 1094238106Sdes if(!w) { 1095238106Sdes return NULL; 1096238106Sdes } 1097238106Sdes if(!(w->timer = comm_timer_create(outnet->base, outnet_tcptimer, w))) { 1098238106Sdes free(w); 1099238106Sdes return NULL; 1100238106Sdes } 1101238106Sdes w->pkt = NULL; 1102238106Sdes w->pkt_len = 0; 1103238106Sdes id = ((unsigned)ub_random(outnet->rnd)>>8) & 0xffff; 1104238106Sdes LDNS_ID_SET(ldns_buffer_begin(packet), id); 1105238106Sdes memcpy(&w->addr, addr, addrlen); 1106238106Sdes w->addrlen = addrlen; 1107238106Sdes w->outnet = outnet; 1108238106Sdes w->cb = callback; 1109238106Sdes w->cb_arg = callback_arg; 1110238106Sdes w->ssl_upstream = ssl_upstream; 1111238106Sdes#ifndef S_SPLINT_S 1112238106Sdes tv.tv_sec = timeout; 1113238106Sdes tv.tv_usec = 0; 1114238106Sdes#endif 1115238106Sdes comm_timer_set(w->timer, &tv); 1116238106Sdes if(pend) { 1117238106Sdes /* we have a buffer available right now */ 1118238106Sdes if(!outnet_tcp_take_into_use(w, ldns_buffer_begin(packet), 1119238106Sdes ldns_buffer_limit(packet))) { 1120238106Sdes waiting_tcp_delete(w); 1121238106Sdes return NULL; 1122238106Sdes } 1123238106Sdes } else { 1124238106Sdes /* queue up */ 1125238106Sdes w->pkt = (uint8_t*)w + sizeof(struct waiting_tcp); 1126238106Sdes w->pkt_len = ldns_buffer_limit(packet); 1127238106Sdes memmove(w->pkt, ldns_buffer_begin(packet), w->pkt_len); 1128238106Sdes w->next_waiting = NULL; 1129238106Sdes if(outnet->tcp_wait_last) 1130238106Sdes outnet->tcp_wait_last->next_waiting = w; 1131238106Sdes else outnet->tcp_wait_first = w; 1132238106Sdes outnet->tcp_wait_last = w; 1133238106Sdes } 1134238106Sdes return w; 1135238106Sdes} 1136238106Sdes 1137238106Sdes/** create query for serviced queries */ 1138238106Sdesstatic void 1139238106Sdesserviced_gen_query(ldns_buffer* buff, uint8_t* qname, size_t qnamelen, 1140238106Sdes uint16_t qtype, uint16_t qclass, uint16_t flags) 1141238106Sdes{ 1142238106Sdes ldns_buffer_clear(buff); 1143238106Sdes /* skip id */ 1144238106Sdes ldns_buffer_write_u16(buff, flags); 1145238106Sdes ldns_buffer_write_u16(buff, 1); /* qdcount */ 1146238106Sdes ldns_buffer_write_u16(buff, 0); /* ancount */ 1147238106Sdes ldns_buffer_write_u16(buff, 0); /* nscount */ 1148238106Sdes ldns_buffer_write_u16(buff, 0); /* arcount */ 1149238106Sdes ldns_buffer_write(buff, qname, qnamelen); 1150238106Sdes ldns_buffer_write_u16(buff, qtype); 1151238106Sdes ldns_buffer_write_u16(buff, qclass); 1152238106Sdes ldns_buffer_flip(buff); 1153238106Sdes} 1154238106Sdes 1155238106Sdes/** lookup serviced query in serviced query rbtree */ 1156238106Sdesstatic struct serviced_query* 1157238106Sdeslookup_serviced(struct outside_network* outnet, ldns_buffer* buff, int dnssec, 1158238106Sdes struct sockaddr_storage* addr, socklen_t addrlen) 1159238106Sdes{ 1160238106Sdes struct serviced_query key; 1161238106Sdes key.node.key = &key; 1162238106Sdes key.qbuf = ldns_buffer_begin(buff); 1163238106Sdes key.qbuflen = ldns_buffer_limit(buff); 1164238106Sdes key.dnssec = dnssec; 1165238106Sdes memcpy(&key.addr, addr, addrlen); 1166238106Sdes key.addrlen = addrlen; 1167238106Sdes key.outnet = outnet; 1168238106Sdes return (struct serviced_query*)rbtree_search(outnet->serviced, &key); 1169238106Sdes} 1170238106Sdes 1171238106Sdes/** Create new serviced entry */ 1172238106Sdesstatic struct serviced_query* 1173238106Sdesserviced_create(struct outside_network* outnet, ldns_buffer* buff, int dnssec, 1174238106Sdes int want_dnssec, int tcp_upstream, int ssl_upstream, 1175238106Sdes struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone, 1176238106Sdes size_t zonelen, int qtype) 1177238106Sdes{ 1178238106Sdes struct serviced_query* sq = (struct serviced_query*)malloc(sizeof(*sq)); 1179238106Sdes#ifdef UNBOUND_DEBUG 1180238106Sdes rbnode_t* ins; 1181238106Sdes#endif 1182238106Sdes if(!sq) 1183238106Sdes return NULL; 1184238106Sdes sq->node.key = sq; 1185238106Sdes sq->qbuf = memdup(ldns_buffer_begin(buff), ldns_buffer_limit(buff)); 1186238106Sdes if(!sq->qbuf) { 1187238106Sdes free(sq); 1188238106Sdes return NULL; 1189238106Sdes } 1190238106Sdes sq->qbuflen = ldns_buffer_limit(buff); 1191238106Sdes sq->zone = memdup(zone, zonelen); 1192238106Sdes if(!sq->zone) { 1193238106Sdes free(sq->qbuf); 1194238106Sdes free(sq); 1195238106Sdes return NULL; 1196238106Sdes } 1197238106Sdes sq->zonelen = zonelen; 1198238106Sdes sq->qtype = qtype; 1199238106Sdes sq->dnssec = dnssec; 1200238106Sdes sq->want_dnssec = want_dnssec; 1201238106Sdes sq->tcp_upstream = tcp_upstream; 1202238106Sdes sq->ssl_upstream = ssl_upstream; 1203238106Sdes memcpy(&sq->addr, addr, addrlen); 1204238106Sdes sq->addrlen = addrlen; 1205238106Sdes sq->outnet = outnet; 1206238106Sdes sq->cblist = NULL; 1207238106Sdes sq->pending = NULL; 1208238106Sdes sq->status = serviced_initial; 1209238106Sdes sq->retry = 0; 1210238106Sdes sq->to_be_deleted = 0; 1211238106Sdes#ifdef UNBOUND_DEBUG 1212238106Sdes ins = 1213238106Sdes#endif 1214238106Sdes rbtree_insert(outnet->serviced, &sq->node); 1215238106Sdes log_assert(ins != NULL); /* must not be already present */ 1216238106Sdes return sq; 1217238106Sdes} 1218238106Sdes 1219238106Sdes/** remove waiting tcp from the outnet waiting list */ 1220238106Sdesstatic void 1221238106Sdeswaiting_list_remove(struct outside_network* outnet, struct waiting_tcp* w) 1222238106Sdes{ 1223238106Sdes struct waiting_tcp* p = outnet->tcp_wait_first, *prev = NULL; 1224238106Sdes while(p) { 1225238106Sdes if(p == w) { 1226238106Sdes /* remove w */ 1227238106Sdes if(prev) 1228238106Sdes prev->next_waiting = w->next_waiting; 1229238106Sdes else outnet->tcp_wait_first = w->next_waiting; 1230238106Sdes if(outnet->tcp_wait_last == w) 1231238106Sdes outnet->tcp_wait_last = prev; 1232238106Sdes return; 1233238106Sdes } 1234238106Sdes prev = p; 1235238106Sdes p = p->next_waiting; 1236238106Sdes } 1237238106Sdes} 1238238106Sdes 1239238106Sdes/** cleanup serviced query entry */ 1240238106Sdesstatic void 1241238106Sdesserviced_delete(struct serviced_query* sq) 1242238106Sdes{ 1243238106Sdes if(sq->pending) { 1244238106Sdes /* clear up the pending query */ 1245238106Sdes if(sq->status == serviced_query_UDP_EDNS || 1246238106Sdes sq->status == serviced_query_UDP || 1247238106Sdes sq->status == serviced_query_PROBE_EDNS || 1248238106Sdes sq->status == serviced_query_UDP_EDNS_FRAG || 1249238106Sdes sq->status == serviced_query_UDP_EDNS_fallback) { 1250238106Sdes struct pending* p = (struct pending*)sq->pending; 1251238106Sdes if(p->pc) 1252238106Sdes portcomm_loweruse(sq->outnet, p->pc); 1253238106Sdes pending_delete(sq->outnet, p); 1254238106Sdes /* this call can cause reentrant calls back into the 1255238106Sdes * mesh */ 1256238106Sdes outnet_send_wait_udp(sq->outnet); 1257238106Sdes } else { 1258238106Sdes struct waiting_tcp* p = (struct waiting_tcp*) 1259238106Sdes sq->pending; 1260238106Sdes if(p->pkt == NULL) { 1261238106Sdes decomission_pending_tcp(sq->outnet, 1262238106Sdes (struct pending_tcp*)p->next_waiting); 1263238106Sdes } else { 1264238106Sdes waiting_list_remove(sq->outnet, p); 1265238106Sdes waiting_tcp_delete(p); 1266238106Sdes } 1267238106Sdes } 1268238106Sdes } 1269238106Sdes /* does not delete from tree, caller has to do that */ 1270238106Sdes serviced_node_del(&sq->node, NULL); 1271238106Sdes} 1272238106Sdes 1273238106Sdes/** perturb a dname capitalization randomly */ 1274238106Sdesstatic void 1275238106Sdesserviced_perturb_qname(struct ub_randstate* rnd, uint8_t* qbuf, size_t len) 1276238106Sdes{ 1277238106Sdes uint8_t lablen; 1278238106Sdes uint8_t* d = qbuf + 10; 1279238106Sdes long int random = 0; 1280238106Sdes int bits = 0; 1281238106Sdes log_assert(len >= 10 + 5 /* offset qname, root, qtype, qclass */); 1282238106Sdes lablen = *d++; 1283238106Sdes while(lablen) { 1284238106Sdes while(lablen--) { 1285238106Sdes /* only perturb A-Z, a-z */ 1286238106Sdes if(isalpha((int)*d)) { 1287238106Sdes /* get a random bit */ 1288238106Sdes if(bits == 0) { 1289238106Sdes random = ub_random(rnd); 1290238106Sdes bits = 30; 1291238106Sdes } 1292238106Sdes if(random & 0x1) { 1293238106Sdes *d = (uint8_t)toupper((int)*d); 1294238106Sdes } else { 1295238106Sdes *d = (uint8_t)tolower((int)*d); 1296238106Sdes } 1297238106Sdes random >>= 1; 1298238106Sdes bits--; 1299238106Sdes } 1300238106Sdes d++; 1301238106Sdes } 1302238106Sdes lablen = *d++; 1303238106Sdes } 1304238106Sdes if(verbosity >= VERB_ALGO) { 1305238106Sdes char buf[LDNS_MAX_DOMAINLEN+1]; 1306238106Sdes dname_str(qbuf+10, buf); 1307238106Sdes verbose(VERB_ALGO, "qname perturbed to %s", buf); 1308238106Sdes } 1309238106Sdes} 1310238106Sdes 1311238106Sdes/** put serviced query into a buffer */ 1312238106Sdesstatic void 1313238106Sdesserviced_encode(struct serviced_query* sq, ldns_buffer* buff, int with_edns) 1314238106Sdes{ 1315238106Sdes /* if we are using 0x20 bits for ID randomness, perturb them */ 1316238106Sdes if(sq->outnet->use_caps_for_id) { 1317238106Sdes serviced_perturb_qname(sq->outnet->rnd, sq->qbuf, sq->qbuflen); 1318238106Sdes } 1319238106Sdes /* generate query */ 1320238106Sdes ldns_buffer_clear(buff); 1321238106Sdes ldns_buffer_write_u16(buff, 0); /* id placeholder */ 1322238106Sdes ldns_buffer_write(buff, sq->qbuf, sq->qbuflen); 1323238106Sdes ldns_buffer_flip(buff); 1324238106Sdes if(with_edns) { 1325238106Sdes /* add edns section */ 1326238106Sdes struct edns_data edns; 1327238106Sdes edns.edns_present = 1; 1328238106Sdes edns.ext_rcode = 0; 1329238106Sdes edns.edns_version = EDNS_ADVERTISED_VERSION; 1330238106Sdes if(sq->status == serviced_query_UDP_EDNS_FRAG) { 1331238106Sdes if(addr_is_ip6(&sq->addr, sq->addrlen)) { 1332238106Sdes if(EDNS_FRAG_SIZE_IP6 < EDNS_ADVERTISED_SIZE) 1333238106Sdes edns.udp_size = EDNS_FRAG_SIZE_IP6; 1334238106Sdes else edns.udp_size = EDNS_ADVERTISED_SIZE; 1335238106Sdes } else { 1336238106Sdes if(EDNS_FRAG_SIZE_IP4 < EDNS_ADVERTISED_SIZE) 1337238106Sdes edns.udp_size = EDNS_FRAG_SIZE_IP4; 1338238106Sdes else edns.udp_size = EDNS_ADVERTISED_SIZE; 1339238106Sdes } 1340238106Sdes } else { 1341238106Sdes edns.udp_size = EDNS_ADVERTISED_SIZE; 1342238106Sdes } 1343238106Sdes edns.bits = 0; 1344238106Sdes if(sq->dnssec & EDNS_DO) 1345238106Sdes edns.bits = EDNS_DO; 1346238106Sdes if(sq->dnssec & BIT_CD) 1347238106Sdes LDNS_CD_SET(ldns_buffer_begin(buff)); 1348238106Sdes attach_edns_record(buff, &edns); 1349238106Sdes } 1350238106Sdes} 1351238106Sdes 1352238106Sdes/** 1353238106Sdes * Perform serviced query UDP sending operation. 1354238106Sdes * Sends UDP with EDNS, unless infra host marked non EDNS. 1355238106Sdes * @param sq: query to send. 1356238106Sdes * @param buff: buffer scratch space. 1357238106Sdes * @return 0 on error. 1358238106Sdes */ 1359238106Sdesstatic int 1360238106Sdesserviced_udp_send(struct serviced_query* sq, ldns_buffer* buff) 1361238106Sdes{ 1362238106Sdes int rtt, vs; 1363238106Sdes uint8_t edns_lame_known; 1364238106Sdes uint32_t now = *sq->outnet->now_secs; 1365238106Sdes 1366238106Sdes if(!infra_host(sq->outnet->infra, &sq->addr, sq->addrlen, sq->zone, 1367238106Sdes sq->zonelen, now, &vs, &edns_lame_known, &rtt)) 1368238106Sdes return 0; 1369238106Sdes sq->last_rtt = rtt; 1370238106Sdes verbose(VERB_ALGO, "EDNS lookup known=%d vs=%d", edns_lame_known, vs); 1371238106Sdes if(sq->status == serviced_initial) { 1372238106Sdes if(edns_lame_known == 0 && rtt > 5000 && rtt < 10001) { 1373238106Sdes /* perform EDNS lame probe - check if server is 1374238106Sdes * EDNS lame (EDNS queries to it are dropped) */ 1375238106Sdes verbose(VERB_ALGO, "serviced query: send probe to see " 1376238106Sdes " if use of EDNS causes timeouts"); 1377238106Sdes /* even 700 msec may be too small */ 1378238106Sdes rtt = 1000; 1379238106Sdes sq->status = serviced_query_PROBE_EDNS; 1380238106Sdes } else if(vs != -1) { 1381238106Sdes sq->status = serviced_query_UDP_EDNS; 1382238106Sdes } else { 1383238106Sdes sq->status = serviced_query_UDP; 1384238106Sdes } 1385238106Sdes } 1386238106Sdes serviced_encode(sq, buff, (sq->status == serviced_query_UDP_EDNS) || 1387238106Sdes (sq->status == serviced_query_UDP_EDNS_FRAG)); 1388238106Sdes sq->last_sent_time = *sq->outnet->now_tv; 1389238106Sdes sq->edns_lame_known = (int)edns_lame_known; 1390238106Sdes verbose(VERB_ALGO, "serviced query UDP timeout=%d msec", rtt); 1391238106Sdes sq->pending = pending_udp_query(sq->outnet, buff, &sq->addr, 1392238106Sdes sq->addrlen, rtt, serviced_udp_callback, sq); 1393238106Sdes if(!sq->pending) 1394238106Sdes return 0; 1395238106Sdes return 1; 1396238106Sdes} 1397238106Sdes 1398238106Sdes/** check that perturbed qname is identical */ 1399238106Sdesstatic int 1400238106Sdesserviced_check_qname(ldns_buffer* pkt, uint8_t* qbuf, size_t qbuflen) 1401238106Sdes{ 1402238106Sdes uint8_t* d1 = ldns_buffer_at(pkt, 12); 1403238106Sdes uint8_t* d2 = qbuf+10; 1404238106Sdes uint8_t len1, len2; 1405238106Sdes int count = 0; 1406238106Sdes log_assert(qbuflen >= 15 /* 10 header, root, type, class */); 1407238106Sdes len1 = *d1++; 1408238106Sdes len2 = *d2++; 1409238106Sdes if(ldns_buffer_limit(pkt) < 12+1+4) /* packet too small for qname */ 1410238106Sdes return 0; 1411238106Sdes while(len1 != 0 || len2 != 0) { 1412238106Sdes if(LABEL_IS_PTR(len1)) { 1413238106Sdes d1 = ldns_buffer_at(pkt, PTR_OFFSET(len1, *d1)); 1414238106Sdes if(d1 >= ldns_buffer_at(pkt, ldns_buffer_limit(pkt))) 1415238106Sdes return 0; 1416238106Sdes len1 = *d1++; 1417238106Sdes if(count++ > MAX_COMPRESS_PTRS) 1418238106Sdes return 0; 1419238106Sdes continue; 1420238106Sdes } 1421238106Sdes if(d2 > qbuf+qbuflen) 1422238106Sdes return 0; 1423238106Sdes if(len1 != len2) 1424238106Sdes return 0; 1425238106Sdes if(len1 > LDNS_MAX_LABELLEN) 1426238106Sdes return 0; 1427238106Sdes log_assert(len1 <= LDNS_MAX_LABELLEN); 1428238106Sdes log_assert(len2 <= LDNS_MAX_LABELLEN); 1429238106Sdes log_assert(len1 == len2 && len1 != 0); 1430238106Sdes /* compare the labels - bitwise identical */ 1431238106Sdes if(memcmp(d1, d2, len1) != 0) 1432238106Sdes return 0; 1433238106Sdes d1 += len1; 1434238106Sdes d2 += len2; 1435238106Sdes len1 = *d1++; 1436238106Sdes len2 = *d2++; 1437238106Sdes } 1438238106Sdes return 1; 1439238106Sdes} 1440238106Sdes 1441238106Sdes/** call the callbacks for a serviced query */ 1442238106Sdesstatic void 1443238106Sdesserviced_callbacks(struct serviced_query* sq, int error, struct comm_point* c, 1444238106Sdes struct comm_reply* rep) 1445238106Sdes{ 1446249141Sdes struct service_callback* p; 1447238106Sdes int dobackup = (sq->cblist && sq->cblist->next); /* >1 cb*/ 1448238106Sdes uint8_t *backup_p = NULL; 1449238106Sdes size_t backlen = 0; 1450238106Sdes#ifdef UNBOUND_DEBUG 1451238106Sdes rbnode_t* rem = 1452238106Sdes#endif 1453238106Sdes /* remove from tree, and schedule for deletion, so that callbacks 1454238106Sdes * can safely deregister themselves and even create new serviced 1455238106Sdes * queries that are identical to this one. */ 1456238106Sdes rbtree_delete(sq->outnet->serviced, sq); 1457238106Sdes log_assert(rem); /* should have been present */ 1458238106Sdes sq->to_be_deleted = 1; 1459238106Sdes verbose(VERB_ALGO, "svcd callbacks start"); 1460238106Sdes if(sq->outnet->use_caps_for_id && error == NETEVENT_NOERROR && c) { 1461238106Sdes /* noerror and nxdomain must have a qname in reply */ 1462238106Sdes if(ldns_buffer_read_u16_at(c->buffer, 4) == 0 && 1463238106Sdes (LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) 1464238106Sdes == LDNS_RCODE_NOERROR || 1465238106Sdes LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) 1466238106Sdes == LDNS_RCODE_NXDOMAIN)) { 1467238106Sdes verbose(VERB_DETAIL, "no qname in reply to check 0x20ID"); 1468238106Sdes log_addr(VERB_DETAIL, "from server", 1469238106Sdes &sq->addr, sq->addrlen); 1470238106Sdes log_buf(VERB_DETAIL, "for packet", c->buffer); 1471238106Sdes error = NETEVENT_CLOSED; 1472238106Sdes c = NULL; 1473238106Sdes } else if(ldns_buffer_read_u16_at(c->buffer, 4) > 0 && 1474238106Sdes !serviced_check_qname(c->buffer, sq->qbuf, 1475238106Sdes sq->qbuflen)) { 1476238106Sdes verbose(VERB_DETAIL, "wrong 0x20-ID in reply qname"); 1477238106Sdes log_addr(VERB_DETAIL, "from server", 1478238106Sdes &sq->addr, sq->addrlen); 1479238106Sdes log_buf(VERB_DETAIL, "for packet", c->buffer); 1480238106Sdes error = NETEVENT_CAPSFAIL; 1481238106Sdes /* and cleanup too */ 1482238106Sdes pkt_dname_tolower(c->buffer, 1483238106Sdes ldns_buffer_at(c->buffer, 12)); 1484238106Sdes } else { 1485238106Sdes verbose(VERB_ALGO, "good 0x20-ID in reply qname"); 1486238106Sdes /* cleanup caps, prettier cache contents. */ 1487238106Sdes pkt_dname_tolower(c->buffer, 1488238106Sdes ldns_buffer_at(c->buffer, 12)); 1489238106Sdes } 1490238106Sdes } 1491238106Sdes if(dobackup && c) { 1492238106Sdes /* make a backup of the query, since the querystate processing 1493238106Sdes * may send outgoing queries that overwrite the buffer. 1494238106Sdes * use secondary buffer to store the query. 1495238106Sdes * This is a data copy, but faster than packet to server */ 1496238106Sdes backlen = ldns_buffer_limit(c->buffer); 1497238106Sdes backup_p = memdup(ldns_buffer_begin(c->buffer), backlen); 1498238106Sdes if(!backup_p) { 1499238106Sdes log_err("malloc failure in serviced query callbacks"); 1500238106Sdes error = NETEVENT_CLOSED; 1501238106Sdes c = NULL; 1502238106Sdes } 1503238106Sdes sq->outnet->svcd_overhead = backlen; 1504238106Sdes } 1505249141Sdes /* test the actual sq->cblist, because the next elem could be deleted*/ 1506249141Sdes while((p=sq->cblist) != NULL) { 1507249141Sdes sq->cblist = p->next; /* remove this element */ 1508238106Sdes if(dobackup && c) { 1509238106Sdes ldns_buffer_clear(c->buffer); 1510238106Sdes ldns_buffer_write(c->buffer, backup_p, backlen); 1511238106Sdes ldns_buffer_flip(c->buffer); 1512238106Sdes } 1513238106Sdes fptr_ok(fptr_whitelist_serviced_query(p->cb)); 1514238106Sdes (void)(*p->cb)(c, p->cb_arg, error, rep); 1515249141Sdes free(p); 1516238106Sdes } 1517238106Sdes if(backup_p) { 1518238106Sdes free(backup_p); 1519238106Sdes sq->outnet->svcd_overhead = 0; 1520238106Sdes } 1521238106Sdes verbose(VERB_ALGO, "svcd callbacks end"); 1522238106Sdes log_assert(sq->cblist == NULL); 1523238106Sdes serviced_delete(sq); 1524238106Sdes} 1525238106Sdes 1526238106Sdesint 1527238106Sdesserviced_tcp_callback(struct comm_point* c, void* arg, int error, 1528238106Sdes struct comm_reply* rep) 1529238106Sdes{ 1530238106Sdes struct serviced_query* sq = (struct serviced_query*)arg; 1531238106Sdes struct comm_reply r2; 1532238106Sdes sq->pending = NULL; /* removed after this callback */ 1533238106Sdes if(error != NETEVENT_NOERROR) 1534238106Sdes log_addr(VERB_QUERY, "tcp error for address", 1535238106Sdes &sq->addr, sq->addrlen); 1536238106Sdes if(error==NETEVENT_NOERROR) 1537238106Sdes infra_update_tcp_works(sq->outnet->infra, &sq->addr, 1538238106Sdes sq->addrlen, sq->zone, sq->zonelen); 1539238106Sdes if(error==NETEVENT_NOERROR && sq->status == serviced_query_TCP_EDNS && 1540238106Sdes (LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) == 1541238106Sdes LDNS_RCODE_FORMERR || LDNS_RCODE_WIRE(ldns_buffer_begin( 1542238106Sdes c->buffer)) == LDNS_RCODE_NOTIMPL) ) { 1543238106Sdes /* attempt to fallback to nonEDNS */ 1544238106Sdes sq->status = serviced_query_TCP_EDNS_fallback; 1545238106Sdes serviced_tcp_initiate(sq->outnet, sq, c->buffer); 1546238106Sdes return 0; 1547238106Sdes } else if(error==NETEVENT_NOERROR && 1548238106Sdes sq->status == serviced_query_TCP_EDNS_fallback && 1549238106Sdes (LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) == 1550238106Sdes LDNS_RCODE_NOERROR || LDNS_RCODE_WIRE( 1551238106Sdes ldns_buffer_begin(c->buffer)) == LDNS_RCODE_NXDOMAIN 1552238106Sdes || LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) 1553238106Sdes == LDNS_RCODE_YXDOMAIN)) { 1554238106Sdes /* the fallback produced a result that looks promising, note 1555238106Sdes * that this server should be approached without EDNS */ 1556238106Sdes /* only store noEDNS in cache if domain is noDNSSEC */ 1557238106Sdes if(!sq->want_dnssec) 1558238106Sdes if(!infra_edns_update(sq->outnet->infra, &sq->addr, 1559238106Sdes sq->addrlen, sq->zone, sq->zonelen, -1, 1560238106Sdes *sq->outnet->now_secs)) 1561238106Sdes log_err("Out of memory caching no edns for host"); 1562238106Sdes sq->status = serviced_query_TCP; 1563238106Sdes } 1564238106Sdes if(sq->tcp_upstream || sq->ssl_upstream) { 1565238106Sdes struct timeval now = *sq->outnet->now_tv; 1566238106Sdes if(now.tv_sec > sq->last_sent_time.tv_sec || 1567238106Sdes (now.tv_sec == sq->last_sent_time.tv_sec && 1568238106Sdes now.tv_usec > sq->last_sent_time.tv_usec)) { 1569238106Sdes /* convert from microseconds to milliseconds */ 1570238106Sdes int roundtime = ((int)now.tv_sec - (int)sq->last_sent_time.tv_sec)*1000 1571238106Sdes + ((int)now.tv_usec - (int)sq->last_sent_time.tv_usec)/1000; 1572238106Sdes verbose(VERB_ALGO, "measured TCP-time at %d msec", roundtime); 1573238106Sdes log_assert(roundtime >= 0); 1574238106Sdes /* only store if less then AUTH_TIMEOUT seconds, it could be 1575238106Sdes * huge due to system-hibernated and we woke up */ 1576238106Sdes if(roundtime < TCP_AUTH_QUERY_TIMEOUT*1000) { 1577238106Sdes if(!infra_rtt_update(sq->outnet->infra, &sq->addr, 1578238106Sdes sq->addrlen, sq->zone, sq->zonelen, sq->qtype, 1579238106Sdes roundtime, sq->last_rtt, (uint32_t)now.tv_sec)) 1580238106Sdes log_err("out of memory noting rtt."); 1581238106Sdes } 1582238106Sdes } 1583238106Sdes } 1584238106Sdes /* insert address into reply info */ 1585238106Sdes if(!rep) { 1586238106Sdes /* create one if there isn't (on errors) */ 1587238106Sdes rep = &r2; 1588238106Sdes r2.c = c; 1589238106Sdes } 1590238106Sdes memcpy(&rep->addr, &sq->addr, sq->addrlen); 1591238106Sdes rep->addrlen = sq->addrlen; 1592238106Sdes serviced_callbacks(sq, error, c, rep); 1593238106Sdes return 0; 1594238106Sdes} 1595238106Sdes 1596238106Sdesstatic void 1597238106Sdesserviced_tcp_initiate(struct outside_network* outnet, 1598238106Sdes struct serviced_query* sq, ldns_buffer* buff) 1599238106Sdes{ 1600238106Sdes verbose(VERB_ALGO, "initiate TCP query %s", 1601238106Sdes sq->status==serviced_query_TCP_EDNS?"EDNS":""); 1602238106Sdes serviced_encode(sq, buff, sq->status == serviced_query_TCP_EDNS); 1603238106Sdes sq->last_sent_time = *sq->outnet->now_tv; 1604238106Sdes sq->pending = pending_tcp_query(outnet, buff, &sq->addr, 1605238106Sdes sq->addrlen, TCP_AUTH_QUERY_TIMEOUT, serviced_tcp_callback, 1606238106Sdes sq, sq->ssl_upstream); 1607238106Sdes if(!sq->pending) { 1608238106Sdes /* delete from tree so that a retry by above layer does not 1609238106Sdes * clash with this entry */ 1610238106Sdes log_err("serviced_tcp_initiate: failed to send tcp query"); 1611238106Sdes serviced_callbacks(sq, NETEVENT_CLOSED, NULL, NULL); 1612238106Sdes } 1613238106Sdes} 1614238106Sdes 1615238106Sdes/** Send serviced query over TCP return false on initial failure */ 1616238106Sdesstatic int 1617238106Sdesserviced_tcp_send(struct serviced_query* sq, ldns_buffer* buff) 1618238106Sdes{ 1619238106Sdes int vs, rtt; 1620238106Sdes uint8_t edns_lame_known; 1621238106Sdes if(!infra_host(sq->outnet->infra, &sq->addr, sq->addrlen, sq->zone, 1622238106Sdes sq->zonelen, *sq->outnet->now_secs, &vs, &edns_lame_known, 1623238106Sdes &rtt)) 1624238106Sdes return 0; 1625238106Sdes if(vs != -1) 1626238106Sdes sq->status = serviced_query_TCP_EDNS; 1627238106Sdes else sq->status = serviced_query_TCP; 1628238106Sdes serviced_encode(sq, buff, sq->status == serviced_query_TCP_EDNS); 1629238106Sdes sq->last_sent_time = *sq->outnet->now_tv; 1630238106Sdes sq->pending = pending_tcp_query(sq->outnet, buff, &sq->addr, 1631238106Sdes sq->addrlen, TCP_AUTH_QUERY_TIMEOUT, serviced_tcp_callback, 1632238106Sdes sq, sq->ssl_upstream); 1633238106Sdes return sq->pending != NULL; 1634238106Sdes} 1635238106Sdes 1636238106Sdesint 1637238106Sdesserviced_udp_callback(struct comm_point* c, void* arg, int error, 1638238106Sdes struct comm_reply* rep) 1639238106Sdes{ 1640238106Sdes struct serviced_query* sq = (struct serviced_query*)arg; 1641238106Sdes struct outside_network* outnet = sq->outnet; 1642238106Sdes struct timeval now = *sq->outnet->now_tv; 1643238106Sdes int fallback_tcp = 0; 1644238106Sdes 1645238106Sdes sq->pending = NULL; /* removed after callback */ 1646238106Sdes if(error == NETEVENT_TIMEOUT) { 1647238106Sdes int rto = 0; 1648238106Sdes if(sq->status == serviced_query_PROBE_EDNS) { 1649238106Sdes /* non-EDNS probe failed; we do not know its status, 1650238106Sdes * keep trying with EDNS, timeout may not be caused 1651238106Sdes * by EDNS. */ 1652238106Sdes sq->status = serviced_query_UDP_EDNS; 1653238106Sdes } 1654238106Sdes if(sq->status == serviced_query_UDP_EDNS && sq->last_rtt < 5000) { 1655238106Sdes /* fallback to 1480/1280 */ 1656238106Sdes sq->status = serviced_query_UDP_EDNS_FRAG; 1657238106Sdes log_name_addr(VERB_ALGO, "try edns1xx0", sq->qbuf+10, 1658238106Sdes &sq->addr, sq->addrlen); 1659238106Sdes if(!serviced_udp_send(sq, c->buffer)) { 1660238106Sdes serviced_callbacks(sq, NETEVENT_CLOSED, c, rep); 1661238106Sdes } 1662238106Sdes return 0; 1663238106Sdes } 1664238106Sdes if(sq->status == serviced_query_UDP_EDNS_FRAG) { 1665238106Sdes /* fragmentation size did not fix it */ 1666238106Sdes sq->status = serviced_query_UDP_EDNS; 1667238106Sdes } 1668238106Sdes sq->retry++; 1669238106Sdes if(!(rto=infra_rtt_update(outnet->infra, &sq->addr, sq->addrlen, 1670238106Sdes sq->zone, sq->zonelen, sq->qtype, -1, sq->last_rtt, 1671238106Sdes (uint32_t)now.tv_sec))) 1672238106Sdes log_err("out of memory in UDP exponential backoff"); 1673238106Sdes if(sq->retry < OUTBOUND_UDP_RETRY) { 1674238106Sdes log_name_addr(VERB_ALGO, "retry query", sq->qbuf+10, 1675238106Sdes &sq->addr, sq->addrlen); 1676238106Sdes if(!serviced_udp_send(sq, c->buffer)) { 1677238106Sdes serviced_callbacks(sq, NETEVENT_CLOSED, c, rep); 1678238106Sdes } 1679238106Sdes return 0; 1680238106Sdes } 1681238106Sdes if(rto >= RTT_MAX_TIMEOUT) { 1682238106Sdes fallback_tcp = 1; 1683238106Sdes /* UDP does not work, fallback to TCP below */ 1684238106Sdes } else { 1685238106Sdes serviced_callbacks(sq, NETEVENT_TIMEOUT, c, rep); 1686238106Sdes return 0; 1687238106Sdes } 1688238106Sdes } else if(error != NETEVENT_NOERROR) { 1689238106Sdes /* udp returns error (due to no ID or interface available) */ 1690238106Sdes serviced_callbacks(sq, error, c, rep); 1691238106Sdes return 0; 1692238106Sdes } 1693238106Sdes if(!fallback_tcp) { 1694238106Sdes if( (sq->status == serviced_query_UDP_EDNS 1695238106Sdes ||sq->status == serviced_query_UDP_EDNS_FRAG) 1696238106Sdes && (LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) 1697238106Sdes == LDNS_RCODE_FORMERR || LDNS_RCODE_WIRE( 1698238106Sdes ldns_buffer_begin(c->buffer)) == LDNS_RCODE_NOTIMPL)) { 1699238106Sdes /* try to get an answer by falling back without EDNS */ 1700238106Sdes verbose(VERB_ALGO, "serviced query: attempt without EDNS"); 1701238106Sdes sq->status = serviced_query_UDP_EDNS_fallback; 1702238106Sdes sq->retry = 0; 1703238106Sdes if(!serviced_udp_send(sq, c->buffer)) { 1704238106Sdes serviced_callbacks(sq, NETEVENT_CLOSED, c, rep); 1705238106Sdes } 1706238106Sdes return 0; 1707238106Sdes } else if(sq->status == serviced_query_PROBE_EDNS) { 1708238106Sdes /* probe without EDNS succeeds, so we conclude that this 1709238106Sdes * host likely has EDNS packets dropped */ 1710238106Sdes log_addr(VERB_DETAIL, "timeouts, concluded that connection to " 1711238106Sdes "host drops EDNS packets", &sq->addr, sq->addrlen); 1712238106Sdes /* only store noEDNS in cache if domain is noDNSSEC */ 1713238106Sdes if(!sq->want_dnssec) 1714238106Sdes if(!infra_edns_update(outnet->infra, &sq->addr, sq->addrlen, 1715238106Sdes sq->zone, sq->zonelen, -1, (uint32_t)now.tv_sec)) { 1716238106Sdes log_err("Out of memory caching no edns for host"); 1717238106Sdes } 1718238106Sdes sq->status = serviced_query_UDP; 1719238106Sdes } else if(sq->status == serviced_query_UDP_EDNS && 1720238106Sdes !sq->edns_lame_known) { 1721238106Sdes /* now we know that edns queries received answers store that */ 1722238106Sdes log_addr(VERB_ALGO, "serviced query: EDNS works for", 1723238106Sdes &sq->addr, sq->addrlen); 1724238106Sdes if(!infra_edns_update(outnet->infra, &sq->addr, sq->addrlen, 1725238106Sdes sq->zone, sq->zonelen, 0, (uint32_t)now.tv_sec)) { 1726238106Sdes log_err("Out of memory caching edns works"); 1727238106Sdes } 1728238106Sdes sq->edns_lame_known = 1; 1729238106Sdes } else if(sq->status == serviced_query_UDP_EDNS_fallback && 1730238106Sdes !sq->edns_lame_known && (LDNS_RCODE_WIRE( 1731238106Sdes ldns_buffer_begin(c->buffer)) == LDNS_RCODE_NOERROR || 1732238106Sdes LDNS_RCODE_WIRE(ldns_buffer_begin(c->buffer)) == 1733238106Sdes LDNS_RCODE_NXDOMAIN || LDNS_RCODE_WIRE(ldns_buffer_begin( 1734238106Sdes c->buffer)) == LDNS_RCODE_YXDOMAIN)) { 1735238106Sdes /* the fallback produced a result that looks promising, note 1736238106Sdes * that this server should be approached without EDNS */ 1737238106Sdes /* only store noEDNS in cache if domain is noDNSSEC */ 1738238106Sdes if(!sq->want_dnssec) { 1739238106Sdes log_addr(VERB_ALGO, "serviced query: EDNS fails for", 1740238106Sdes &sq->addr, sq->addrlen); 1741238106Sdes if(!infra_edns_update(outnet->infra, &sq->addr, sq->addrlen, 1742238106Sdes sq->zone, sq->zonelen, -1, (uint32_t)now.tv_sec)) { 1743238106Sdes log_err("Out of memory caching no edns for host"); 1744238106Sdes } 1745238106Sdes } else { 1746238106Sdes log_addr(VERB_ALGO, "serviced query: EDNS fails, but " 1747238106Sdes "not stored because need DNSSEC for", &sq->addr, 1748238106Sdes sq->addrlen); 1749238106Sdes } 1750238106Sdes sq->status = serviced_query_UDP; 1751238106Sdes } 1752238106Sdes if(now.tv_sec > sq->last_sent_time.tv_sec || 1753238106Sdes (now.tv_sec == sq->last_sent_time.tv_sec && 1754238106Sdes now.tv_usec > sq->last_sent_time.tv_usec)) { 1755238106Sdes /* convert from microseconds to milliseconds */ 1756238106Sdes int roundtime = ((int)now.tv_sec - (int)sq->last_sent_time.tv_sec)*1000 1757238106Sdes + ((int)now.tv_usec - (int)sq->last_sent_time.tv_usec)/1000; 1758238106Sdes verbose(VERB_ALGO, "measured roundtrip at %d msec", roundtime); 1759238106Sdes log_assert(roundtime >= 0); 1760238106Sdes /* in case the system hibernated, do not enter a huge value, 1761238106Sdes * above this value gives trouble with server selection */ 1762238106Sdes if(roundtime < 60000) { 1763238106Sdes if(!infra_rtt_update(outnet->infra, &sq->addr, sq->addrlen, 1764238106Sdes sq->zone, sq->zonelen, sq->qtype, roundtime, 1765238106Sdes sq->last_rtt, (uint32_t)now.tv_sec)) 1766238106Sdes log_err("out of memory noting rtt."); 1767238106Sdes } 1768238106Sdes } 1769238106Sdes } /* end of if_!fallback_tcp */ 1770238106Sdes /* perform TC flag check and TCP fallback after updating our 1771238106Sdes * cache entries for EDNS status and RTT times */ 1772238106Sdes if(LDNS_TC_WIRE(ldns_buffer_begin(c->buffer)) || fallback_tcp) { 1773238106Sdes /* fallback to TCP */ 1774238106Sdes /* this discards partial UDP contents */ 1775238106Sdes if(sq->status == serviced_query_UDP_EDNS || 1776238106Sdes sq->status == serviced_query_UDP_EDNS_FRAG || 1777238106Sdes sq->status == serviced_query_UDP_EDNS_fallback) 1778238106Sdes /* if we have unfinished EDNS_fallback, start again */ 1779238106Sdes sq->status = serviced_query_TCP_EDNS; 1780238106Sdes else sq->status = serviced_query_TCP; 1781238106Sdes serviced_tcp_initiate(outnet, sq, c->buffer); 1782238106Sdes return 0; 1783238106Sdes } 1784238106Sdes /* yay! an answer */ 1785238106Sdes serviced_callbacks(sq, error, c, rep); 1786238106Sdes return 0; 1787238106Sdes} 1788238106Sdes 1789238106Sdesstruct serviced_query* 1790238106Sdesoutnet_serviced_query(struct outside_network* outnet, 1791238106Sdes uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass, 1792238106Sdes uint16_t flags, int dnssec, int want_dnssec, int tcp_upstream, 1793238106Sdes int ssl_upstream, struct sockaddr_storage* addr, socklen_t addrlen, 1794238106Sdes uint8_t* zone, size_t zonelen, comm_point_callback_t* callback, 1795249141Sdes void* callback_arg, ldns_buffer* buff) 1796238106Sdes{ 1797238106Sdes struct serviced_query* sq; 1798238106Sdes struct service_callback* cb; 1799238106Sdes serviced_gen_query(buff, qname, qnamelen, qtype, qclass, flags); 1800238106Sdes sq = lookup_serviced(outnet, buff, dnssec, addr, addrlen); 1801249141Sdes /* duplicate entries are included in the callback list, because 1802249141Sdes * there is a counterpart registration by our caller that needs to 1803249141Sdes * be doubly-removed (with callbacks perhaps). */ 1804238106Sdes if(!(cb = (struct service_callback*)malloc(sizeof(*cb)))) 1805238106Sdes return NULL; 1806238106Sdes if(!sq) { 1807238106Sdes /* make new serviced query entry */ 1808238106Sdes sq = serviced_create(outnet, buff, dnssec, want_dnssec, 1809238106Sdes tcp_upstream, ssl_upstream, addr, addrlen, zone, 1810238106Sdes zonelen, (int)qtype); 1811238106Sdes if(!sq) { 1812238106Sdes free(cb); 1813238106Sdes return NULL; 1814238106Sdes } 1815238106Sdes /* perform first network action */ 1816238106Sdes if(outnet->do_udp && !(tcp_upstream || ssl_upstream)) { 1817238106Sdes if(!serviced_udp_send(sq, buff)) { 1818238106Sdes (void)rbtree_delete(outnet->serviced, sq); 1819238106Sdes free(sq->qbuf); 1820238106Sdes free(sq->zone); 1821238106Sdes free(sq); 1822238106Sdes free(cb); 1823238106Sdes return NULL; 1824238106Sdes } 1825238106Sdes } else { 1826238106Sdes if(!serviced_tcp_send(sq, buff)) { 1827238106Sdes (void)rbtree_delete(outnet->serviced, sq); 1828238106Sdes free(sq->qbuf); 1829238106Sdes free(sq->zone); 1830238106Sdes free(sq); 1831238106Sdes free(cb); 1832238106Sdes return NULL; 1833238106Sdes } 1834238106Sdes } 1835238106Sdes } 1836238106Sdes /* add callback to list of callbacks */ 1837238106Sdes cb->cb = callback; 1838238106Sdes cb->cb_arg = callback_arg; 1839238106Sdes cb->next = sq->cblist; 1840238106Sdes sq->cblist = cb; 1841238106Sdes return sq; 1842238106Sdes} 1843238106Sdes 1844238106Sdes/** remove callback from list */ 1845238106Sdesstatic void 1846238106Sdescallback_list_remove(struct serviced_query* sq, void* cb_arg) 1847238106Sdes{ 1848238106Sdes struct service_callback** pp = &sq->cblist; 1849238106Sdes while(*pp) { 1850238106Sdes if((*pp)->cb_arg == cb_arg) { 1851238106Sdes struct service_callback* del = *pp; 1852238106Sdes *pp = del->next; 1853238106Sdes free(del); 1854238106Sdes return; 1855238106Sdes } 1856238106Sdes pp = &(*pp)->next; 1857238106Sdes } 1858238106Sdes} 1859238106Sdes 1860238106Sdesvoid outnet_serviced_query_stop(struct serviced_query* sq, void* cb_arg) 1861238106Sdes{ 1862238106Sdes if(!sq) 1863238106Sdes return; 1864238106Sdes callback_list_remove(sq, cb_arg); 1865238106Sdes /* if callbacks() routine scheduled deletion, let it do that */ 1866238106Sdes if(!sq->cblist && !sq->to_be_deleted) { 1867238106Sdes#ifdef UNBOUND_DEBUG 1868238106Sdes rbnode_t* rem = 1869238106Sdes#endif 1870238106Sdes rbtree_delete(sq->outnet->serviced, sq); 1871238106Sdes log_assert(rem); /* should be present */ 1872238106Sdes serviced_delete(sq); 1873238106Sdes } 1874238106Sdes} 1875238106Sdes 1876238106Sdes/** get memory used by waiting tcp entry (in use or not) */ 1877238106Sdesstatic size_t 1878238106Sdeswaiting_tcp_get_mem(struct waiting_tcp* w) 1879238106Sdes{ 1880238106Sdes size_t s; 1881238106Sdes if(!w) return 0; 1882238106Sdes s = sizeof(*w) + w->pkt_len; 1883238106Sdes if(w->timer) 1884238106Sdes s += comm_timer_get_mem(w->timer); 1885238106Sdes return s; 1886238106Sdes} 1887238106Sdes 1888238106Sdes/** get memory used by port if */ 1889238106Sdesstatic size_t 1890238106Sdesif_get_mem(struct port_if* pif) 1891238106Sdes{ 1892238106Sdes size_t s; 1893238106Sdes int i; 1894238106Sdes s = sizeof(*pif) + sizeof(int)*pif->avail_total + 1895238106Sdes sizeof(struct port_comm*)*pif->maxout; 1896238106Sdes for(i=0; i<pif->inuse; i++) 1897238106Sdes s += sizeof(*pif->out[i]) + 1898238106Sdes comm_point_get_mem(pif->out[i]->cp); 1899238106Sdes return s; 1900238106Sdes} 1901238106Sdes 1902238106Sdes/** get memory used by waiting udp */ 1903238106Sdesstatic size_t 1904238106Sdeswaiting_udp_get_mem(struct pending* w) 1905238106Sdes{ 1906238106Sdes size_t s; 1907238106Sdes s = sizeof(*w) + comm_timer_get_mem(w->timer) + w->pkt_len; 1908238106Sdes return s; 1909238106Sdes} 1910238106Sdes 1911238106Sdessize_t outnet_get_mem(struct outside_network* outnet) 1912238106Sdes{ 1913238106Sdes size_t i; 1914238106Sdes int k; 1915238106Sdes struct waiting_tcp* w; 1916238106Sdes struct pending* u; 1917238106Sdes struct serviced_query* sq; 1918238106Sdes struct service_callback* sb; 1919238106Sdes struct port_comm* pc; 1920238106Sdes size_t s = sizeof(*outnet) + sizeof(*outnet->base) + 1921238106Sdes sizeof(*outnet->udp_buff) + 1922238106Sdes ldns_buffer_capacity(outnet->udp_buff); 1923238106Sdes /* second buffer is not ours */ 1924238106Sdes for(pc = outnet->unused_fds; pc; pc = pc->next) { 1925238106Sdes s += sizeof(*pc) + comm_point_get_mem(pc->cp); 1926238106Sdes } 1927238106Sdes for(k=0; k<outnet->num_ip4; k++) 1928238106Sdes s += if_get_mem(&outnet->ip4_ifs[k]); 1929238106Sdes for(k=0; k<outnet->num_ip6; k++) 1930238106Sdes s += if_get_mem(&outnet->ip6_ifs[k]); 1931238106Sdes for(u=outnet->udp_wait_first; u; u=u->next_waiting) 1932238106Sdes s += waiting_udp_get_mem(u); 1933238106Sdes 1934238106Sdes s += sizeof(struct pending_tcp*)*outnet->num_tcp; 1935238106Sdes for(i=0; i<outnet->num_tcp; i++) { 1936238106Sdes s += sizeof(struct pending_tcp); 1937238106Sdes s += comm_point_get_mem(outnet->tcp_conns[i]->c); 1938238106Sdes if(outnet->tcp_conns[i]->query) 1939238106Sdes s += waiting_tcp_get_mem(outnet->tcp_conns[i]->query); 1940238106Sdes } 1941238106Sdes for(w=outnet->tcp_wait_first; w; w = w->next_waiting) 1942238106Sdes s += waiting_tcp_get_mem(w); 1943238106Sdes s += sizeof(*outnet->pending); 1944238106Sdes s += (sizeof(struct pending) + comm_timer_get_mem(NULL)) * 1945238106Sdes outnet->pending->count; 1946238106Sdes s += sizeof(*outnet->serviced); 1947238106Sdes s += outnet->svcd_overhead; 1948238106Sdes RBTREE_FOR(sq, struct serviced_query*, outnet->serviced) { 1949238106Sdes s += sizeof(*sq) + sq->qbuflen; 1950238106Sdes for(sb = sq->cblist; sb; sb = sb->next) 1951238106Sdes s += sizeof(*sb); 1952238106Sdes } 1953238106Sdes return s; 1954238106Sdes} 1955238106Sdes 1956238106Sdessize_t 1957238106Sdesserviced_get_mem(struct serviced_query* sq) 1958238106Sdes{ 1959238106Sdes struct service_callback* sb; 1960238106Sdes size_t s; 1961238106Sdes s = sizeof(*sq) + sq->qbuflen; 1962238106Sdes for(sb = sq->cblist; sb; sb = sb->next) 1963238106Sdes s += sizeof(*sb); 1964238106Sdes if(sq->status == serviced_query_UDP_EDNS || 1965238106Sdes sq->status == serviced_query_UDP || 1966238106Sdes sq->status == serviced_query_PROBE_EDNS || 1967238106Sdes sq->status == serviced_query_UDP_EDNS_FRAG || 1968238106Sdes sq->status == serviced_query_UDP_EDNS_fallback) { 1969238106Sdes s += sizeof(struct pending); 1970238106Sdes s += comm_timer_get_mem(NULL); 1971238106Sdes } else { 1972238106Sdes /* does not have size of the pkt pointer */ 1973238106Sdes /* always has a timer except on malloc failures */ 1974238106Sdes 1975238106Sdes /* these sizes are part of the main outside network mem */ 1976238106Sdes /* 1977238106Sdes s += sizeof(struct waiting_tcp); 1978238106Sdes s += comm_timer_get_mem(NULL); 1979238106Sdes */ 1980238106Sdes } 1981238106Sdes return s; 1982238106Sdes} 1983238106Sdes 1984