2 * services/outside_network.c - implement sending of queries and wait answer.
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
6 * This software is open source.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
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.
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.
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.
39 * This file has functions to send queries to authoritative servers and
40 * wait for the pending answer events.
44 #ifdef HAVE_SYS_TYPES_H
45 # include <sys/types.h>
48 #include "services/outside_network.h"
49 #include "services/listen_dnsport.h"
50 #include "services/cache/infra.h"
51 #include "util/data/msgparse.h"
52 #include "util/data/msgreply.h"
53 #include "util/data/msgencode.h"
54 #include "util/data/dname.h"
55 #include "util/netevent.h"
57 #include "util/net_help.h"
58 #include "util/random.h"
59 #include "util/fptr_wlist.h"
60 #include "sldns/sbuffer.h"
61 #include "dnstap/dnstap.h"
62 #ifdef HAVE_OPENSSL_SSL_H
63 #include <openssl/ssl.h>
71 /** number of times to retry making a random ID that is unique. */
72 #define MAX_ID_RETRY 1000
73 /** number of times to retry finding interface, port that can be opened. */
74 #define MAX_PORT_RETRY 10000
75 /** number of retries on outgoing UDP queries */
76 #define OUTBOUND_UDP_RETRY 1
78 /** initiate TCP transaction for serviced query */
79 static void serviced_tcp_initiate(struct serviced_query* sq, sldns_buffer* buff);
80 /** with a fd available, randomize and send UDP */
81 static int randomize_and_send_udp(struct pending* pend, sldns_buffer* packet,
84 /** remove waiting tcp from the outnet waiting list */
85 static void waiting_list_remove(struct outside_network* outnet,
86 struct waiting_tcp* w);
89 pending_cmp(const void* key1, const void* key2)
91 struct pending *p1 = (struct pending*)key1;
92 struct pending *p2 = (struct pending*)key2;
97 log_assert(p1->id == p2->id);
98 return sockaddr_cmp(&p1->addr, p1->addrlen, &p2->addr, p2->addrlen);
102 serviced_cmp(const void* key1, const void* key2)
104 struct serviced_query* q1 = (struct serviced_query*)key1;
105 struct serviced_query* q2 = (struct serviced_query*)key2;
107 if(q1->qbuflen < q2->qbuflen)
109 if(q1->qbuflen > q2->qbuflen)
111 log_assert(q1->qbuflen == q2->qbuflen);
112 log_assert(q1->qbuflen >= 15 /* 10 header, root, type, class */);
113 /* alternate casing of qname is still the same query */
114 if((r = memcmp(q1->qbuf, q2->qbuf, 10)) != 0)
116 if((r = memcmp(q1->qbuf+q1->qbuflen-4, q2->qbuf+q2->qbuflen-4, 4)) != 0)
118 if(q1->dnssec != q2->dnssec) {
119 if(q1->dnssec < q2->dnssec)
123 if((r = query_dname_compare(q1->qbuf+10, q2->qbuf+10)) != 0)
125 if((r = edns_opt_list_compare(q1->opt_list, q2->opt_list)) != 0)
127 return sockaddr_cmp(&q1->addr, q1->addrlen, &q2->addr, q2->addrlen);
130 /** delete waiting_tcp entry. Does not unlink from waiting list.
131 * @param w: to delete.
134 waiting_tcp_delete(struct waiting_tcp* w)
138 comm_timer_delete(w->timer);
143 * Pick random outgoing-interface of that family, and bind it.
144 * port set to 0 so OS picks a port number for us.
145 * if it is the ANY address, do not bind.
146 * @param w: tcp structure with destination address.
147 * @param s: socket fd.
148 * @return false on error, socket closed.
151 pick_outgoing_tcp(struct waiting_tcp* w, int s)
153 struct port_if* pi = NULL;
156 if(addr_is_ip6(&w->addr, w->addrlen))
157 num = w->outnet->num_ip6;
160 num = w->outnet->num_ip4;
162 log_err("no TCP outgoing interfaces of family");
163 log_addr(VERB_OPS, "for addr", &w->addr, w->addrlen);
172 if(addr_is_ip6(&w->addr, w->addrlen))
173 pi = &w->outnet->ip6_ifs[ub_random_max(w->outnet->rnd, num)];
176 pi = &w->outnet->ip4_ifs[ub_random_max(w->outnet->rnd, num)];
178 if(addr_is_any(&pi->addr, pi->addrlen)) {
179 /* binding to the ANY interface is for listening sockets */
183 if(addr_is_ip6(&pi->addr, pi->addrlen))
184 ((struct sockaddr_in6*)&pi->addr)->sin6_port = 0;
185 else ((struct sockaddr_in*)&pi->addr)->sin_port = 0;
186 if(bind(s, (struct sockaddr*)&pi->addr, pi->addrlen) != 0) {
188 log_err("outgoing tcp: bind: %s", strerror(errno));
191 log_err("outgoing tcp: bind: %s",
192 wsa_strerror(WSAGetLastError()));
197 log_addr(VERB_ALGO, "tcp bound to src", &pi->addr, pi->addrlen);
201 /** use next free buffer to service a tcp query */
203 outnet_tcp_take_into_use(struct waiting_tcp* w, uint8_t* pkt, size_t pkt_len)
205 struct pending_tcp* pend = w->outnet->tcp_free;
209 log_assert(w->addrlen > 0);
212 if(addr_is_ip6(&w->addr, w->addrlen))
213 s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
216 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
219 log_err_addr("outgoing tcp: socket", strerror(errno),
220 &w->addr, w->addrlen);
222 log_err_addr("outgoing tcp: socket",
223 wsa_strerror(WSAGetLastError()), &w->addr, w->addrlen);
228 if (w->outnet->tcp_mss > 0) {
229 #if defined(IPPROTO_TCP) && defined(TCP_MAXSEG)
230 if(setsockopt(s, IPPROTO_TCP, TCP_MAXSEG,
231 (void*)&w->outnet->tcp_mss,
232 (socklen_t)sizeof(w->outnet->tcp_mss)) < 0) {
233 verbose(VERB_ALGO, "outgoing tcp:"
234 " setsockopt(.. SO_REUSEADDR ..) failed");
237 verbose(VERB_ALGO, "outgoing tcp:"
238 " setsockopt(TCP_MAXSEG) unsupported");
239 #endif /* defined(IPPROTO_TCP) && defined(TCP_MAXSEG) */
242 if(!pick_outgoing_tcp(w, s))
246 #ifdef USE_OSX_MSG_FASTOPEN
247 /* API for fast open is different here. We use a connectx() function and
248 then writes can happen as normal even using SSL.*/
249 /* connectx requires that the len be set in the sockaddr struct*/
250 struct sockaddr_in *addr_in = (struct sockaddr_in *)&w->addr;
251 addr_in->sin_len = w->addrlen;
252 sa_endpoints_t endpoints;
253 endpoints.sae_srcif = 0;
254 endpoints.sae_srcaddr = NULL;
255 endpoints.sae_srcaddrlen = 0;
256 endpoints.sae_dstaddr = (struct sockaddr *)&w->addr;
257 endpoints.sae_dstaddrlen = w->addrlen;
258 if (connectx(s, &endpoints, SAE_ASSOCID_ANY,
259 CONNECT_DATA_IDEMPOTENT | CONNECT_RESUME_ON_READ_WRITE,
260 NULL, 0, NULL, NULL) == -1) {
261 #else /* USE_OSX_MSG_FASTOPEN*/
262 #ifdef USE_MSG_FASTOPEN
263 pend->c->tcp_do_fastopen = 1;
264 /* Only do TFO for TCP in which case no connect() is required here.
265 Don't combine client TFO with SSL, since OpenSSL can't
266 currently support doing a handshake on fd that already isn't connected*/
267 if (w->outnet->sslctx && w->ssl_upstream) {
268 if(connect(s, (struct sockaddr*)&w->addr, w->addrlen) == -1) {
269 #else /* USE_MSG_FASTOPEN*/
270 if(connect(s, (struct sockaddr*)&w->addr, w->addrlen) == -1) {
271 #endif /* USE_MSG_FASTOPEN*/
272 #endif /* USE_OSX_MSG_FASTOPEN*/
275 if(errno != EINPROGRESS) {
279 if(tcp_connect_errno_needs_log(
280 (struct sockaddr*)&w->addr, w->addrlen))
281 log_err_addr("outgoing tcp: connect",
282 strerror(errno), &w->addr, w->addrlen);
284 #else /* USE_WINSOCK */
285 if(WSAGetLastError() != WSAEINPROGRESS &&
286 WSAGetLastError() != WSAEWOULDBLOCK) {
292 #ifdef USE_MSG_FASTOPEN
294 #endif /* USE_MSG_FASTOPEN */
295 if(w->outnet->sslctx && w->ssl_upstream) {
296 pend->c->ssl = outgoing_ssl_fd(w->outnet->sslctx, s);
299 comm_point_close(pend->c);
303 comm_point_tcp_win_bio_cb(pend->c, pend->c->ssl);
305 pend->c->ssl_shake_state = comm_ssl_shake_write;
308 w->next_waiting = (void*)pend;
309 pend->id = LDNS_ID_WIRE(pkt);
310 w->outnet->num_tcp_outgoing++;
311 w->outnet->tcp_free = pend->next_free;
312 pend->next_free = NULL;
314 pend->c->repinfo.addrlen = w->addrlen;
315 memcpy(&pend->c->repinfo.addr, &w->addr, w->addrlen);
316 sldns_buffer_clear(pend->c->buffer);
317 sldns_buffer_write(pend->c->buffer, pkt, pkt_len);
318 sldns_buffer_flip(pend->c->buffer);
319 pend->c->tcp_is_reading = 0;
320 pend->c->tcp_byte_count = 0;
321 comm_point_start_listening(pend->c, s, -1);
325 /** see if buffers can be used to service TCP queries */
327 use_free_buffer(struct outside_network* outnet)
329 struct waiting_tcp* w;
330 while(outnet->tcp_free && outnet->tcp_wait_first
331 && !outnet->want_to_quit) {
332 w = outnet->tcp_wait_first;
333 outnet->tcp_wait_first = w->next_waiting;
334 if(outnet->tcp_wait_last == w)
335 outnet->tcp_wait_last = NULL;
336 if(!outnet_tcp_take_into_use(w, w->pkt, w->pkt_len)) {
337 comm_point_callback_t* cb = w->cb;
338 void* cb_arg = w->cb_arg;
339 waiting_tcp_delete(w);
340 fptr_ok(fptr_whitelist_pending_tcp(cb));
341 (void)(*cb)(NULL, cb_arg, NETEVENT_CLOSED, NULL);
346 /** decomission a tcp buffer, closes commpoint and frees waiting_tcp entry */
348 decomission_pending_tcp(struct outside_network* outnet,
349 struct pending_tcp* pend)
353 SSL_shutdown(pend->c->ssl);
354 SSL_free(pend->c->ssl);
358 comm_point_close(pend->c);
359 pend->next_free = outnet->tcp_free;
360 outnet->tcp_free = pend;
361 waiting_tcp_delete(pend->query);
363 use_free_buffer(outnet);
367 outnet_tcp_cb(struct comm_point* c, void* arg, int error,
368 struct comm_reply *reply_info)
370 struct pending_tcp* pend = (struct pending_tcp*)arg;
371 struct outside_network* outnet = pend->query->outnet;
372 verbose(VERB_ALGO, "outnettcp cb");
373 if(error != NETEVENT_NOERROR) {
374 verbose(VERB_QUERY, "outnettcp got tcp error %d", error);
375 /* pass error below and exit */
378 if(sldns_buffer_limit(c->buffer) < sizeof(uint16_t) ||
379 LDNS_ID_WIRE(sldns_buffer_begin(c->buffer))!=pend->id) {
381 "outnettcp: bad ID in reply, from:",
382 &pend->query->addr, pend->query->addrlen);
383 error = NETEVENT_CLOSED;
386 fptr_ok(fptr_whitelist_pending_tcp(pend->query->cb));
387 (void)(*pend->query->cb)(c, pend->query->cb_arg, error, reply_info);
388 decomission_pending_tcp(outnet, pend);
392 /** lower use count on pc, see if it can be closed */
394 portcomm_loweruse(struct outside_network* outnet, struct port_comm* pc)
397 pc->num_outstanding--;
398 if(pc->num_outstanding > 0) {
401 /* close it and replace in unused list */
402 verbose(VERB_ALGO, "close of port %d", pc->number);
403 comm_point_close(pc->cp);
405 log_assert(pif->inuse > 0);
406 pif->avail_ports[pif->avail_total - pif->inuse] = pc->number;
408 pif->out[pc->index] = pif->out[pif->inuse];
409 pif->out[pc->index]->index = pc->index;
410 pc->next = outnet->unused_fds;
411 outnet->unused_fds = pc;
414 /** try to send waiting UDP queries */
416 outnet_send_wait_udp(struct outside_network* outnet)
418 struct pending* pend;
419 /* process waiting queries */
420 while(outnet->udp_wait_first && outnet->unused_fds
421 && !outnet->want_to_quit) {
422 pend = outnet->udp_wait_first;
423 outnet->udp_wait_first = pend->next_waiting;
424 if(!pend->next_waiting) outnet->udp_wait_last = NULL;
425 sldns_buffer_clear(outnet->udp_buff);
426 sldns_buffer_write(outnet->udp_buff, pend->pkt, pend->pkt_len);
427 sldns_buffer_flip(outnet->udp_buff);
428 free(pend->pkt); /* freeing now makes get_mem correct */
431 if(!randomize_and_send_udp(pend, outnet->udp_buff,
433 /* callback error on pending */
435 fptr_ok(fptr_whitelist_pending_udp(pend->cb));
436 (void)(*pend->cb)(outnet->unused_fds->cp, pend->cb_arg,
437 NETEVENT_CLOSED, NULL);
439 pending_delete(outnet, pend);
445 outnet_udp_cb(struct comm_point* c, void* arg, int error,
446 struct comm_reply *reply_info)
448 struct outside_network* outnet = (struct outside_network*)arg;
451 verbose(VERB_ALGO, "answer cb");
453 if(error != NETEVENT_NOERROR) {
454 verbose(VERB_QUERY, "outnetudp got udp error %d", error);
457 if(sldns_buffer_limit(c->buffer) < LDNS_HEADER_SIZE) {
458 verbose(VERB_QUERY, "outnetudp udp too short");
461 log_assert(reply_info);
463 /* setup lookup key */
464 key.id = (unsigned)LDNS_ID_WIRE(sldns_buffer_begin(c->buffer));
465 memcpy(&key.addr, &reply_info->addr, reply_info->addrlen);
466 key.addrlen = reply_info->addrlen;
467 verbose(VERB_ALGO, "Incoming reply id = %4.4x", key.id);
468 log_addr(VERB_ALGO, "Incoming reply addr =",
469 &reply_info->addr, reply_info->addrlen);
471 /* find it, see if this thing is a valid query response */
472 verbose(VERB_ALGO, "lookup size is %d entries", (int)outnet->pending->count);
473 p = (struct pending*)rbtree_search(outnet->pending, &key);
475 verbose(VERB_QUERY, "received unwanted or unsolicited udp reply dropped.");
476 log_buf(VERB_ALGO, "dropped message", c->buffer);
477 outnet->unwanted_replies++;
478 if(outnet->unwanted_threshold && ++outnet->unwanted_total
479 >= outnet->unwanted_threshold) {
480 log_warn("unwanted reply total reached threshold (%u)"
481 " you may be under attack."
482 " defensive action: clearing the cache",
483 (unsigned)outnet->unwanted_threshold);
484 fptr_ok(fptr_whitelist_alloc_cleanup(
485 outnet->unwanted_action));
486 (*outnet->unwanted_action)(outnet->unwanted_param);
487 outnet->unwanted_total = 0;
492 verbose(VERB_ALGO, "received udp reply.");
493 log_buf(VERB_ALGO, "udp message", c->buffer);
495 verbose(VERB_QUERY, "received reply id,addr on wrong port. "
497 outnet->unwanted_replies++;
498 if(outnet->unwanted_threshold && ++outnet->unwanted_total
499 >= outnet->unwanted_threshold) {
500 log_warn("unwanted reply total reached threshold (%u)"
501 " you may be under attack."
502 " defensive action: clearing the cache",
503 (unsigned)outnet->unwanted_threshold);
504 fptr_ok(fptr_whitelist_alloc_cleanup(
505 outnet->unwanted_action));
506 (*outnet->unwanted_action)(outnet->unwanted_param);
507 outnet->unwanted_total = 0;
511 comm_timer_disable(p->timer);
512 verbose(VERB_ALGO, "outnet handle udp reply");
513 /* delete from tree first in case callback creates a retry */
514 (void)rbtree_delete(outnet->pending, p->node.key);
516 fptr_ok(fptr_whitelist_pending_udp(p->cb));
517 (void)(*p->cb)(p->pc->cp, p->cb_arg, NETEVENT_NOERROR, reply_info);
519 portcomm_loweruse(outnet, p->pc);
520 pending_delete(NULL, p);
521 outnet_send_wait_udp(outnet);
525 /** calculate number of ip4 and ip6 interfaces*/
527 calc_num46(char** ifs, int num_ifs, int do_ip4, int do_ip6,
528 int* num_ip4, int* num_ip6)
540 for(i=0; i<num_ifs; i++)
542 if(str_is_ip6(ifs[i])) {
554 pending_udp_timer_delay_cb(void* arg)
556 struct pending* p = (struct pending*)arg;
557 struct outside_network* outnet = p->outnet;
558 verbose(VERB_ALGO, "timeout udp with delay");
559 portcomm_loweruse(outnet, p->pc);
560 pending_delete(outnet, p);
561 outnet_send_wait_udp(outnet);
565 pending_udp_timer_cb(void *arg)
567 struct pending* p = (struct pending*)arg;
568 struct outside_network* outnet = p->outnet;
570 verbose(VERB_ALGO, "timeout udp");
572 fptr_ok(fptr_whitelist_pending_udp(p->cb));
573 (void)(*p->cb)(p->pc->cp, p->cb_arg, NETEVENT_TIMEOUT, NULL);
575 /* if delayclose, keep port open for a longer time.
576 * But if the udpwaitlist exists, then we are struggling to
577 * keep up with demand for sockets, so do not wait, but service
578 * the customer (customer service more important than portICMPs) */
579 if(outnet->delayclose && !outnet->udp_wait_first) {
581 p->timer->callback = &pending_udp_timer_delay_cb;
582 comm_timer_set(p->timer, &outnet->delay_tv);
585 portcomm_loweruse(outnet, p->pc);
586 pending_delete(outnet, p);
587 outnet_send_wait_udp(outnet);
590 /** create pending_tcp buffers */
592 create_pending_tcp(struct outside_network* outnet, size_t bufsize)
595 if(outnet->num_tcp == 0)
596 return 1; /* no tcp needed, nothing to do */
597 if(!(outnet->tcp_conns = (struct pending_tcp **)calloc(
598 outnet->num_tcp, sizeof(struct pending_tcp*))))
600 for(i=0; i<outnet->num_tcp; i++) {
601 if(!(outnet->tcp_conns[i] = (struct pending_tcp*)calloc(1,
602 sizeof(struct pending_tcp))))
604 outnet->tcp_conns[i]->next_free = outnet->tcp_free;
605 outnet->tcp_free = outnet->tcp_conns[i];
606 outnet->tcp_conns[i]->c = comm_point_create_tcp_out(
607 outnet->base, bufsize, outnet_tcp_cb,
608 outnet->tcp_conns[i]);
609 if(!outnet->tcp_conns[i]->c)
615 /** setup an outgoing interface, ready address */
616 static int setup_if(struct port_if* pif, const char* addrstr,
617 int* avail, int numavail, size_t numfd)
619 pif->avail_total = numavail;
620 pif->avail_ports = (int*)memdup(avail, (size_t)numavail*sizeof(int));
621 if(!pif->avail_ports)
623 if(!ipstrtoaddr(addrstr, UNBOUND_DNS_PORT, &pif->addr, &pif->addrlen) &&
624 !netblockstrtoaddr(addrstr, UNBOUND_DNS_PORT,
625 &pif->addr, &pif->addrlen, &pif->pfxlen))
627 pif->maxout = (int)numfd;
629 pif->out = (struct port_comm**)calloc(numfd,
630 sizeof(struct port_comm*));
636 struct outside_network*
637 outside_network_create(struct comm_base *base, size_t bufsize,
638 size_t num_ports, char** ifs, int num_ifs, int do_ip4,
639 int do_ip6, size_t num_tcp, struct infra_cache* infra,
640 struct ub_randstate* rnd, int use_caps_for_id, int* availports,
641 int numavailports, size_t unwanted_threshold, int tcp_mss,
642 void (*unwanted_action)(void*), void* unwanted_param, int do_udp,
643 void* sslctx, int delayclose, struct dt_env* dtenv)
645 struct outside_network* outnet = (struct outside_network*)
646 calloc(1, sizeof(struct outside_network));
649 log_err("malloc failed");
652 comm_base_timept(base, &outnet->now_secs, &outnet->now_tv);
654 outnet->num_tcp = num_tcp;
655 outnet->num_tcp_outgoing = 0;
656 outnet->infra = infra;
658 outnet->sslctx = sslctx;
660 outnet->dtenv = dtenv;
664 outnet->svcd_overhead = 0;
665 outnet->want_to_quit = 0;
666 outnet->unwanted_threshold = unwanted_threshold;
667 outnet->unwanted_action = unwanted_action;
668 outnet->unwanted_param = unwanted_param;
669 outnet->use_caps_for_id = use_caps_for_id;
670 outnet->do_udp = do_udp;
671 outnet->tcp_mss = tcp_mss;
674 outnet->delayclose = 1;
675 outnet->delay_tv.tv_sec = delayclose/1000;
676 outnet->delay_tv.tv_usec = (delayclose%1000)*1000;
679 if(numavailports == 0) {
680 log_err("no outgoing ports available");
681 outside_network_delete(outnet);
687 calc_num46(ifs, num_ifs, do_ip4, do_ip6,
688 &outnet->num_ip4, &outnet->num_ip6);
689 if(outnet->num_ip4 != 0) {
690 if(!(outnet->ip4_ifs = (struct port_if*)calloc(
691 (size_t)outnet->num_ip4, sizeof(struct port_if)))) {
692 log_err("malloc failed");
693 outside_network_delete(outnet);
697 if(outnet->num_ip6 != 0) {
698 if(!(outnet->ip6_ifs = (struct port_if*)calloc(
699 (size_t)outnet->num_ip6, sizeof(struct port_if)))) {
700 log_err("malloc failed");
701 outside_network_delete(outnet);
705 if( !(outnet->udp_buff = sldns_buffer_new(bufsize)) ||
706 !(outnet->pending = rbtree_create(pending_cmp)) ||
707 !(outnet->serviced = rbtree_create(serviced_cmp)) ||
708 !create_pending_tcp(outnet, bufsize)) {
709 log_err("malloc failed");
710 outside_network_delete(outnet);
714 /* allocate commpoints */
715 for(k=0; k<num_ports; k++) {
716 struct port_comm* pc;
717 pc = (struct port_comm*)calloc(1, sizeof(*pc));
719 log_err("malloc failed");
720 outside_network_delete(outnet);
723 pc->cp = comm_point_create_udp(outnet->base, -1,
724 outnet->udp_buff, outnet_udp_cb, outnet);
726 log_err("malloc failed");
728 outside_network_delete(outnet);
731 pc->next = outnet->unused_fds;
732 outnet->unused_fds = pc;
735 /* allocate interfaces */
737 if(do_ip4 && !setup_if(&outnet->ip4_ifs[0], "0.0.0.0",
738 availports, numavailports, num_ports)) {
739 log_err("malloc failed");
740 outside_network_delete(outnet);
743 if(do_ip6 && !setup_if(&outnet->ip6_ifs[0], "::",
744 availports, numavailports, num_ports)) {
745 log_err("malloc failed");
746 outside_network_delete(outnet);
750 size_t done_4 = 0, done_6 = 0;
752 for(i=0; i<num_ifs; i++) {
753 if(str_is_ip6(ifs[i]) && do_ip6) {
754 if(!setup_if(&outnet->ip6_ifs[done_6], ifs[i],
755 availports, numavailports, num_ports)){
756 log_err("malloc failed");
757 outside_network_delete(outnet);
762 if(!str_is_ip6(ifs[i]) && do_ip4) {
763 if(!setup_if(&outnet->ip4_ifs[done_4], ifs[i],
764 availports, numavailports, num_ports)){
765 log_err("malloc failed");
766 outside_network_delete(outnet);
776 /** helper pending delete */
778 pending_node_del(rbnode_t* node, void* arg)
780 struct pending* pend = (struct pending*)node;
781 struct outside_network* outnet = (struct outside_network*)arg;
782 pending_delete(outnet, pend);
785 /** helper serviced delete */
787 serviced_node_del(rbnode_t* node, void* ATTR_UNUSED(arg))
789 struct serviced_query* sq = (struct serviced_query*)node;
790 struct service_callback* p = sq->cblist, *np;
793 edns_opt_list_free(sq->opt_list);
803 outside_network_quit_prepare(struct outside_network* outnet)
807 /* prevent queued items from being sent */
808 outnet->want_to_quit = 1;
812 outside_network_delete(struct outside_network* outnet)
816 outnet->want_to_quit = 1;
817 /* check every element, since we can be called on malloc error */
818 if(outnet->pending) {
819 /* free pending elements, but do no unlink from tree. */
820 traverse_postorder(outnet->pending, pending_node_del, NULL);
821 free(outnet->pending);
823 if(outnet->serviced) {
824 traverse_postorder(outnet->serviced, serviced_node_del, NULL);
825 free(outnet->serviced);
828 sldns_buffer_free(outnet->udp_buff);
829 if(outnet->unused_fds) {
830 struct port_comm* p = outnet->unused_fds, *np;
833 comm_point_delete(p->cp);
837 outnet->unused_fds = NULL;
839 if(outnet->ip4_ifs) {
841 for(i=0; i<outnet->num_ip4; i++) {
842 for(k=0; k<outnet->ip4_ifs[i].inuse; k++) {
843 struct port_comm* pc = outnet->ip4_ifs[i].
845 comm_point_delete(pc->cp);
848 free(outnet->ip4_ifs[i].avail_ports);
849 free(outnet->ip4_ifs[i].out);
851 free(outnet->ip4_ifs);
853 if(outnet->ip6_ifs) {
855 for(i=0; i<outnet->num_ip6; i++) {
856 for(k=0; k<outnet->ip6_ifs[i].inuse; k++) {
857 struct port_comm* pc = outnet->ip6_ifs[i].
859 comm_point_delete(pc->cp);
862 free(outnet->ip6_ifs[i].avail_ports);
863 free(outnet->ip6_ifs[i].out);
865 free(outnet->ip6_ifs);
867 if(outnet->tcp_conns) {
869 for(i=0; i<outnet->num_tcp; i++)
870 if(outnet->tcp_conns[i]) {
871 comm_point_delete(outnet->tcp_conns[i]->c);
872 waiting_tcp_delete(outnet->tcp_conns[i]->query);
873 free(outnet->tcp_conns[i]);
875 free(outnet->tcp_conns);
877 if(outnet->tcp_wait_first) {
878 struct waiting_tcp* p = outnet->tcp_wait_first, *np;
880 np = p->next_waiting;
881 waiting_tcp_delete(p);
885 if(outnet->udp_wait_first) {
886 struct pending* p = outnet->udp_wait_first, *np;
888 np = p->next_waiting;
889 pending_delete(NULL, p);
897 pending_delete(struct outside_network* outnet, struct pending* p)
901 if(outnet && outnet->udp_wait_first &&
902 (p->next_waiting || p == outnet->udp_wait_last) ) {
903 /* delete from waiting list, if it is in the waiting list */
904 struct pending* prev = NULL, *x = outnet->udp_wait_first;
912 prev->next_waiting = p->next_waiting;
913 else outnet->udp_wait_first = p->next_waiting;
914 if(outnet->udp_wait_last == p)
915 outnet->udp_wait_last = prev;
919 (void)rbtree_delete(outnet->pending, p->node.key);
922 comm_timer_delete(p->timer);
928 sai6_putrandom(struct sockaddr_in6 *sa, int pfxlen, struct ub_randstate *rnd)
931 if(!(pfxlen > 0 && pfxlen < 128))
933 for(i = 0; i < (128 - pfxlen) / 8; i++) {
934 sa->sin6_addr.s6_addr[15-i] = (uint8_t)ub_random_max(rnd, 256);
938 sa->sin6_addr.s6_addr[15-i] |=
939 ((0xFF >> last) & ub_random_max(rnd, 256));
944 * Try to open a UDP socket for outgoing communication.
945 * Sets sockets options as needed.
946 * @param addr: socket address.
947 * @param addrlen: length of address.
948 * @param pfxlen: length of network prefix (for address randomisation).
949 * @param port: port override for addr.
950 * @param inuse: if -1 is returned, this bool means the port was in use.
951 * @param rnd: random state (for address randomisation).
955 udp_sockport(struct sockaddr_storage* addr, socklen_t addrlen, int pfxlen,
956 int port, int* inuse, struct ub_randstate* rnd)
959 if(addr_is_ip6(addr, addrlen)) {
961 struct sockaddr_in6 sa = *(struct sockaddr_in6*)addr;
962 sa.sin6_port = (in_port_t)htons((uint16_t)port);
965 sai6_putrandom(&sa, pfxlen, rnd);
967 fd = create_udp_sock(AF_INET6, SOCK_DGRAM,
968 (struct sockaddr*)&sa, addrlen, 1, inuse, &noproto,
969 0, 0, 0, NULL, 0, freebind);
971 struct sockaddr_in* sa = (struct sockaddr_in*)addr;
972 sa->sin_port = (in_port_t)htons((uint16_t)port);
973 fd = create_udp_sock(AF_INET, SOCK_DGRAM,
974 (struct sockaddr*)addr, addrlen, 1, inuse, &noproto,
975 0, 0, 0, NULL, 0, 0);
980 /** Select random ID */
982 select_id(struct outside_network* outnet, struct pending* pend,
983 sldns_buffer* packet)
986 pend->id = ((unsigned)ub_random(outnet->rnd)>>8) & 0xffff;
987 LDNS_ID_SET(sldns_buffer_begin(packet), pend->id);
990 pend->node.key = pend;
991 while(!rbtree_insert(outnet->pending, &pend->node)) {
992 /* change ID to avoid collision */
993 pend->id = ((unsigned)ub_random(outnet->rnd)>>8) & 0xffff;
994 LDNS_ID_SET(sldns_buffer_begin(packet), pend->id);
996 if(id_tries == MAX_ID_RETRY) {
997 pend->id=99999; /* non existant ID */
998 log_err("failed to generate unique ID, drop msg");
1002 verbose(VERB_ALGO, "inserted new pending reply id=%4.4x", pend->id);
1006 /** Select random interface and port */
1008 select_ifport(struct outside_network* outnet, struct pending* pend,
1009 int num_if, struct port_if* ifs)
1011 int my_if, my_port, fd, portno, inuse, tries=0;
1012 struct port_if* pif;
1013 /* randomly select interface and port */
1015 verbose(VERB_QUERY, "Need to send query but have no "
1016 "outgoing interfaces of that family");
1019 log_assert(outnet->unused_fds);
1022 my_if = ub_random_max(outnet->rnd, num_if);
1024 my_port = ub_random_max(outnet->rnd, pif->avail_total);
1025 if(my_port < pif->inuse) {
1026 /* port already open */
1027 pend->pc = pif->out[my_port];
1028 verbose(VERB_ALGO, "using UDP if=%d port=%d",
1029 my_if, pend->pc->number);
1032 /* try to open new port, if fails, loop to try again */
1033 log_assert(pif->inuse < pif->maxout);
1034 portno = pif->avail_ports[my_port - pif->inuse];
1035 fd = udp_sockport(&pif->addr, pif->addrlen, pif->pfxlen,
1036 portno, &inuse, outnet->rnd);
1037 if(fd == -1 && !inuse) {
1038 /* nonrecoverable error making socket */
1042 verbose(VERB_ALGO, "opened UDP if=%d port=%d",
1045 pend->pc = outnet->unused_fds;
1046 outnet->unused_fds = pend->pc->next;
1048 /* setup portcomm */
1049 pend->pc->next = NULL;
1050 pend->pc->number = portno;
1051 pend->pc->pif = pif;
1052 pend->pc->index = pif->inuse;
1053 pend->pc->num_outstanding = 0;
1054 comm_point_start_listening(pend->pc->cp, fd, -1);
1056 /* grab port in interface */
1057 pif->out[pif->inuse] = pend->pc;
1058 pif->avail_ports[my_port - pif->inuse] =
1059 pif->avail_ports[pif->avail_total-pif->inuse-1];
1063 /* failed, already in use */
1064 verbose(VERB_QUERY, "port %d in use, trying another", portno);
1066 if(tries == MAX_PORT_RETRY) {
1067 log_err("failed to find an open port, drop msg");
1071 log_assert(pend->pc);
1072 pend->pc->num_outstanding++;
1078 randomize_and_send_udp(struct pending* pend, sldns_buffer* packet, int timeout)
1081 struct outside_network* outnet = pend->sq->outnet;
1084 if(!select_id(outnet, pend, packet)) {
1088 /* select src_if, port */
1089 if(addr_is_ip6(&pend->addr, pend->addrlen)) {
1090 if(!select_ifport(outnet, pend,
1091 outnet->num_ip6, outnet->ip6_ifs))
1094 if(!select_ifport(outnet, pend,
1095 outnet->num_ip4, outnet->ip4_ifs))
1098 log_assert(pend->pc && pend->pc->cp);
1100 /* send it over the commlink */
1101 if(!comm_point_send_udp_msg(pend->pc->cp, packet,
1102 (struct sockaddr*)&pend->addr, pend->addrlen)) {
1103 portcomm_loweruse(outnet, pend->pc);
1107 /* system calls to set timeout after sending UDP to make roundtrip
1110 tv.tv_sec = timeout/1000;
1111 tv.tv_usec = (timeout%1000)*1000;
1113 comm_timer_set(pend->timer, &tv);
1117 (outnet->dtenv->log_resolver_query_messages ||
1118 outnet->dtenv->log_forwarder_query_messages))
1119 dt_msg_send_outside_query(outnet->dtenv, &pend->addr, comm_udp,
1120 pend->sq->zone, pend->sq->zonelen, packet);
1126 pending_udp_query(struct serviced_query* sq, struct sldns_buffer* packet,
1127 int timeout, comm_point_callback_t* cb, void* cb_arg)
1129 struct pending* pend = (struct pending*)calloc(1, sizeof(*pend));
1130 if(!pend) return NULL;
1131 pend->outnet = sq->outnet;
1133 pend->addrlen = sq->addrlen;
1134 memmove(&pend->addr, &sq->addr, sq->addrlen);
1136 pend->cb_arg = cb_arg;
1137 pend->node.key = pend;
1138 pend->timer = comm_timer_create(sq->outnet->base, pending_udp_timer_cb,
1145 if(sq->outnet->unused_fds == NULL) {
1146 /* no unused fd, cannot create a new port (randomly) */
1147 verbose(VERB_ALGO, "no fds available, udp query waiting");
1148 pend->timeout = timeout;
1149 pend->pkt_len = sldns_buffer_limit(packet);
1150 pend->pkt = (uint8_t*)memdup(sldns_buffer_begin(packet),
1153 comm_timer_delete(pend->timer);
1157 /* put at end of waiting list */
1158 if(sq->outnet->udp_wait_last)
1159 sq->outnet->udp_wait_last->next_waiting = pend;
1161 sq->outnet->udp_wait_first = pend;
1162 sq->outnet->udp_wait_last = pend;
1165 if(!randomize_and_send_udp(pend, packet, timeout)) {
1166 pending_delete(sq->outnet, pend);
1173 outnet_tcptimer(void* arg)
1175 struct waiting_tcp* w = (struct waiting_tcp*)arg;
1176 struct outside_network* outnet = w->outnet;
1177 comm_point_callback_t* cb;
1180 /* it is on the waiting list */
1181 waiting_list_remove(outnet, w);
1184 struct pending_tcp* pend=(struct pending_tcp*)w->next_waiting;
1185 comm_point_close(pend->c);
1187 pend->next_free = outnet->tcp_free;
1188 outnet->tcp_free = pend;
1192 waiting_tcp_delete(w);
1193 fptr_ok(fptr_whitelist_pending_tcp(cb));
1194 (void)(*cb)(NULL, cb_arg, NETEVENT_TIMEOUT, NULL);
1195 use_free_buffer(outnet);
1199 pending_tcp_query(struct serviced_query* sq, sldns_buffer* packet,
1200 int timeout, comm_point_callback_t* callback, void* callback_arg)
1202 struct pending_tcp* pend = sq->outnet->tcp_free;
1203 struct waiting_tcp* w;
1206 /* if no buffer is free allocate space to store query */
1207 w = (struct waiting_tcp*)malloc(sizeof(struct waiting_tcp)
1208 + (pend?0:sldns_buffer_limit(packet)));
1212 if(!(w->timer = comm_timer_create(sq->outnet->base, outnet_tcptimer, w))) {
1218 id = ((unsigned)ub_random(sq->outnet->rnd)>>8) & 0xffff;
1219 LDNS_ID_SET(sldns_buffer_begin(packet), id);
1220 memcpy(&w->addr, &sq->addr, sq->addrlen);
1221 w->addrlen = sq->addrlen;
1222 w->outnet = sq->outnet;
1224 w->cb_arg = callback_arg;
1225 w->ssl_upstream = sq->ssl_upstream;
1227 tv.tv_sec = timeout;
1230 comm_timer_set(w->timer, &tv);
1232 /* we have a buffer available right now */
1233 if(!outnet_tcp_take_into_use(w, sldns_buffer_begin(packet),
1234 sldns_buffer_limit(packet))) {
1235 waiting_tcp_delete(w);
1239 if(sq->outnet->dtenv &&
1240 (sq->outnet->dtenv->log_resolver_query_messages ||
1241 sq->outnet->dtenv->log_forwarder_query_messages))
1242 dt_msg_send_outside_query(sq->outnet->dtenv, &sq->addr,
1243 comm_tcp, sq->zone, sq->zonelen, packet);
1247 w->pkt = (uint8_t*)w + sizeof(struct waiting_tcp);
1248 w->pkt_len = sldns_buffer_limit(packet);
1249 memmove(w->pkt, sldns_buffer_begin(packet), w->pkt_len);
1250 w->next_waiting = NULL;
1251 if(sq->outnet->tcp_wait_last)
1252 sq->outnet->tcp_wait_last->next_waiting = w;
1253 else sq->outnet->tcp_wait_first = w;
1254 sq->outnet->tcp_wait_last = w;
1259 /** create query for serviced queries */
1261 serviced_gen_query(sldns_buffer* buff, uint8_t* qname, size_t qnamelen,
1262 uint16_t qtype, uint16_t qclass, uint16_t flags)
1264 sldns_buffer_clear(buff);
1266 sldns_buffer_write_u16(buff, flags);
1267 sldns_buffer_write_u16(buff, 1); /* qdcount */
1268 sldns_buffer_write_u16(buff, 0); /* ancount */
1269 sldns_buffer_write_u16(buff, 0); /* nscount */
1270 sldns_buffer_write_u16(buff, 0); /* arcount */
1271 sldns_buffer_write(buff, qname, qnamelen);
1272 sldns_buffer_write_u16(buff, qtype);
1273 sldns_buffer_write_u16(buff, qclass);
1274 sldns_buffer_flip(buff);
1277 /** lookup serviced query in serviced query rbtree */
1278 static struct serviced_query*
1279 lookup_serviced(struct outside_network* outnet, sldns_buffer* buff, int dnssec,
1280 struct sockaddr_storage* addr, socklen_t addrlen,
1281 struct edns_option* opt_list)
1283 struct serviced_query key;
1284 key.node.key = &key;
1285 key.qbuf = sldns_buffer_begin(buff);
1286 key.qbuflen = sldns_buffer_limit(buff);
1287 key.dnssec = dnssec;
1288 memcpy(&key.addr, addr, addrlen);
1289 key.addrlen = addrlen;
1290 key.outnet = outnet;
1291 key.opt_list = opt_list;
1292 return (struct serviced_query*)rbtree_search(outnet->serviced, &key);
1295 /** Create new serviced entry */
1296 static struct serviced_query*
1297 serviced_create(struct outside_network* outnet, sldns_buffer* buff, int dnssec,
1298 int want_dnssec, int nocaps, int tcp_upstream, int ssl_upstream,
1299 struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
1300 size_t zonelen, int qtype, struct edns_option* opt_list)
1302 struct serviced_query* sq = (struct serviced_query*)malloc(sizeof(*sq));
1303 #ifdef UNBOUND_DEBUG
1309 sq->qbuf = memdup(sldns_buffer_begin(buff), sldns_buffer_limit(buff));
1314 sq->qbuflen = sldns_buffer_limit(buff);
1315 sq->zone = memdup(zone, zonelen);
1321 sq->zonelen = zonelen;
1323 sq->dnssec = dnssec;
1324 sq->want_dnssec = want_dnssec;
1325 sq->nocaps = nocaps;
1326 sq->tcp_upstream = tcp_upstream;
1327 sq->ssl_upstream = ssl_upstream;
1328 memcpy(&sq->addr, addr, addrlen);
1329 sq->addrlen = addrlen;
1330 sq->opt_list = NULL;
1332 sq->opt_list = edns_opt_copy_alloc(opt_list);
1340 sq->outnet = outnet;
1343 sq->status = serviced_initial;
1345 sq->to_be_deleted = 0;
1346 #ifdef UNBOUND_DEBUG
1351 rbtree_insert(outnet->serviced, &sq->node);
1352 log_assert(ins != NULL); /* must not be already present */
1356 /** remove waiting tcp from the outnet waiting list */
1358 waiting_list_remove(struct outside_network* outnet, struct waiting_tcp* w)
1360 struct waiting_tcp* p = outnet->tcp_wait_first, *prev = NULL;
1365 prev->next_waiting = w->next_waiting;
1366 else outnet->tcp_wait_first = w->next_waiting;
1367 if(outnet->tcp_wait_last == w)
1368 outnet->tcp_wait_last = prev;
1372 p = p->next_waiting;
1376 /** cleanup serviced query entry */
1378 serviced_delete(struct serviced_query* sq)
1381 /* clear up the pending query */
1382 if(sq->status == serviced_query_UDP_EDNS ||
1383 sq->status == serviced_query_UDP ||
1384 sq->status == serviced_query_PROBE_EDNS ||
1385 sq->status == serviced_query_UDP_EDNS_FRAG ||
1386 sq->status == serviced_query_UDP_EDNS_fallback) {
1387 struct pending* p = (struct pending*)sq->pending;
1389 portcomm_loweruse(sq->outnet, p->pc);
1390 pending_delete(sq->outnet, p);
1391 /* this call can cause reentrant calls back into the
1393 outnet_send_wait_udp(sq->outnet);
1395 struct waiting_tcp* p = (struct waiting_tcp*)
1397 if(p->pkt == NULL) {
1398 decomission_pending_tcp(sq->outnet,
1399 (struct pending_tcp*)p->next_waiting);
1401 waiting_list_remove(sq->outnet, p);
1402 waiting_tcp_delete(p);
1406 /* does not delete from tree, caller has to do that */
1407 serviced_node_del(&sq->node, NULL);
1410 /** perturb a dname capitalization randomly */
1412 serviced_perturb_qname(struct ub_randstate* rnd, uint8_t* qbuf, size_t len)
1415 uint8_t* d = qbuf + 10;
1416 long int random = 0;
1418 log_assert(len >= 10 + 5 /* offset qname, root, qtype, qclass */);
1423 /* only perturb A-Z, a-z */
1424 if(isalpha((unsigned char)*d)) {
1425 /* get a random bit */
1427 random = ub_random(rnd);
1431 *d = (uint8_t)toupper((unsigned char)*d);
1433 *d = (uint8_t)tolower((unsigned char)*d);
1442 if(verbosity >= VERB_ALGO) {
1443 char buf[LDNS_MAX_DOMAINLEN+1];
1444 dname_str(qbuf+10, buf);
1445 verbose(VERB_ALGO, "qname perturbed to %s", buf);
1449 /** put serviced query into a buffer */
1451 serviced_encode(struct serviced_query* sq, sldns_buffer* buff, int with_edns)
1453 /* if we are using 0x20 bits for ID randomness, perturb them */
1454 if(sq->outnet->use_caps_for_id && !sq->nocaps) {
1455 serviced_perturb_qname(sq->outnet->rnd, sq->qbuf, sq->qbuflen);
1457 /* generate query */
1458 sldns_buffer_clear(buff);
1459 sldns_buffer_write_u16(buff, 0); /* id placeholder */
1460 sldns_buffer_write(buff, sq->qbuf, sq->qbuflen);
1461 sldns_buffer_flip(buff);
1463 /* add edns section */
1464 struct edns_data edns;
1465 edns.edns_present = 1;
1467 edns.edns_version = EDNS_ADVERTISED_VERSION;
1468 edns.opt_list = sq->opt_list;
1469 if(sq->status == serviced_query_UDP_EDNS_FRAG) {
1470 if(addr_is_ip6(&sq->addr, sq->addrlen)) {
1471 if(EDNS_FRAG_SIZE_IP6 < EDNS_ADVERTISED_SIZE)
1472 edns.udp_size = EDNS_FRAG_SIZE_IP6;
1473 else edns.udp_size = EDNS_ADVERTISED_SIZE;
1475 if(EDNS_FRAG_SIZE_IP4 < EDNS_ADVERTISED_SIZE)
1476 edns.udp_size = EDNS_FRAG_SIZE_IP4;
1477 else edns.udp_size = EDNS_ADVERTISED_SIZE;
1480 edns.udp_size = EDNS_ADVERTISED_SIZE;
1483 if(sq->dnssec & EDNS_DO)
1484 edns.bits = EDNS_DO;
1485 if(sq->dnssec & BIT_CD)
1486 LDNS_CD_SET(sldns_buffer_begin(buff));
1487 attach_edns_record(buff, &edns);
1492 * Perform serviced query UDP sending operation.
1493 * Sends UDP with EDNS, unless infra host marked non EDNS.
1494 * @param sq: query to send.
1495 * @param buff: buffer scratch space.
1496 * @return 0 on error.
1499 serviced_udp_send(struct serviced_query* sq, sldns_buffer* buff)
1502 uint8_t edns_lame_known;
1503 time_t now = *sq->outnet->now_secs;
1505 if(!infra_host(sq->outnet->infra, &sq->addr, sq->addrlen, sq->zone,
1506 sq->zonelen, now, &vs, &edns_lame_known, &rtt))
1509 verbose(VERB_ALGO, "EDNS lookup known=%d vs=%d", edns_lame_known, vs);
1510 if(sq->status == serviced_initial) {
1511 if(edns_lame_known == 0 && rtt > 5000 && rtt < 10001) {
1512 /* perform EDNS lame probe - check if server is
1513 * EDNS lame (EDNS queries to it are dropped) */
1514 verbose(VERB_ALGO, "serviced query: send probe to see "
1515 " if use of EDNS causes timeouts");
1516 /* even 700 msec may be too small */
1518 sq->status = serviced_query_PROBE_EDNS;
1519 } else if(vs != -1) {
1520 sq->status = serviced_query_UDP_EDNS;
1522 sq->status = serviced_query_UDP;
1525 serviced_encode(sq, buff, (sq->status == serviced_query_UDP_EDNS) ||
1526 (sq->status == serviced_query_UDP_EDNS_FRAG));
1527 sq->last_sent_time = *sq->outnet->now_tv;
1528 sq->edns_lame_known = (int)edns_lame_known;
1529 verbose(VERB_ALGO, "serviced query UDP timeout=%d msec", rtt);
1530 sq->pending = pending_udp_query(sq, buff, rtt,
1531 serviced_udp_callback, sq);
1537 /** check that perturbed qname is identical */
1539 serviced_check_qname(sldns_buffer* pkt, uint8_t* qbuf, size_t qbuflen)
1541 uint8_t* d1 = sldns_buffer_at(pkt, 12);
1542 uint8_t* d2 = qbuf+10;
1545 log_assert(qbuflen >= 15 /* 10 header, root, type, class */);
1548 if(sldns_buffer_limit(pkt) < 12+1+4) /* packet too small for qname */
1550 while(len1 != 0 || len2 != 0) {
1551 if(LABEL_IS_PTR(len1)) {
1552 d1 = sldns_buffer_at(pkt, PTR_OFFSET(len1, *d1));
1553 if(d1 >= sldns_buffer_at(pkt, sldns_buffer_limit(pkt)))
1556 if(count++ > MAX_COMPRESS_PTRS)
1560 if(d2 > qbuf+qbuflen)
1564 if(len1 > LDNS_MAX_LABELLEN)
1566 log_assert(len1 <= LDNS_MAX_LABELLEN);
1567 log_assert(len2 <= LDNS_MAX_LABELLEN);
1568 log_assert(len1 == len2 && len1 != 0);
1569 /* compare the labels - bitwise identical */
1570 if(memcmp(d1, d2, len1) != 0)
1580 /** call the callbacks for a serviced query */
1582 serviced_callbacks(struct serviced_query* sq, int error, struct comm_point* c,
1583 struct comm_reply* rep)
1585 struct service_callback* p;
1586 int dobackup = (sq->cblist && sq->cblist->next); /* >1 cb*/
1587 uint8_t *backup_p = NULL;
1589 #ifdef UNBOUND_DEBUG
1594 /* remove from tree, and schedule for deletion, so that callbacks
1595 * can safely deregister themselves and even create new serviced
1596 * queries that are identical to this one. */
1597 rbtree_delete(sq->outnet->serviced, sq);
1598 log_assert(rem); /* should have been present */
1599 sq->to_be_deleted = 1;
1600 verbose(VERB_ALGO, "svcd callbacks start");
1601 if(sq->outnet->use_caps_for_id && error == NETEVENT_NOERROR && c &&
1602 !sq->nocaps && sq->qtype != LDNS_RR_TYPE_PTR) {
1603 /* for type PTR do not check perturbed name in answer,
1604 * compatibility with cisco dns guard boxes that mess up
1605 * reverse queries 0x20 contents */
1606 /* noerror and nxdomain must have a qname in reply */
1607 if(sldns_buffer_read_u16_at(c->buffer, 4) == 0 &&
1608 (LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer))
1609 == LDNS_RCODE_NOERROR ||
1610 LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer))
1611 == LDNS_RCODE_NXDOMAIN)) {
1612 verbose(VERB_DETAIL, "no qname in reply to check 0x20ID");
1613 log_addr(VERB_DETAIL, "from server",
1614 &sq->addr, sq->addrlen);
1615 log_buf(VERB_DETAIL, "for packet", c->buffer);
1616 error = NETEVENT_CLOSED;
1618 } else if(sldns_buffer_read_u16_at(c->buffer, 4) > 0 &&
1619 !serviced_check_qname(c->buffer, sq->qbuf,
1621 verbose(VERB_DETAIL, "wrong 0x20-ID in reply qname");
1622 log_addr(VERB_DETAIL, "from server",
1623 &sq->addr, sq->addrlen);
1624 log_buf(VERB_DETAIL, "for packet", c->buffer);
1625 error = NETEVENT_CAPSFAIL;
1626 /* and cleanup too */
1627 pkt_dname_tolower(c->buffer,
1628 sldns_buffer_at(c->buffer, 12));
1630 verbose(VERB_ALGO, "good 0x20-ID in reply qname");
1631 /* cleanup caps, prettier cache contents. */
1632 pkt_dname_tolower(c->buffer,
1633 sldns_buffer_at(c->buffer, 12));
1637 /* make a backup of the query, since the querystate processing
1638 * may send outgoing queries that overwrite the buffer.
1639 * use secondary buffer to store the query.
1640 * This is a data copy, but faster than packet to server */
1641 backlen = sldns_buffer_limit(c->buffer);
1642 backup_p = memdup(sldns_buffer_begin(c->buffer), backlen);
1644 log_err("malloc failure in serviced query callbacks");
1645 error = NETEVENT_CLOSED;
1648 sq->outnet->svcd_overhead = backlen;
1650 /* test the actual sq->cblist, because the next elem could be deleted*/
1651 while((p=sq->cblist) != NULL) {
1652 sq->cblist = p->next; /* remove this element */
1654 sldns_buffer_clear(c->buffer);
1655 sldns_buffer_write(c->buffer, backup_p, backlen);
1656 sldns_buffer_flip(c->buffer);
1658 fptr_ok(fptr_whitelist_serviced_query(p->cb));
1659 (void)(*p->cb)(c, p->cb_arg, error, rep);
1664 sq->outnet->svcd_overhead = 0;
1666 verbose(VERB_ALGO, "svcd callbacks end");
1667 log_assert(sq->cblist == NULL);
1668 serviced_delete(sq);
1672 serviced_tcp_callback(struct comm_point* c, void* arg, int error,
1673 struct comm_reply* rep)
1675 struct serviced_query* sq = (struct serviced_query*)arg;
1676 struct comm_reply r2;
1677 sq->pending = NULL; /* removed after this callback */
1678 if(error != NETEVENT_NOERROR)
1679 log_addr(VERB_QUERY, "tcp error for address",
1680 &sq->addr, sq->addrlen);
1681 if(error==NETEVENT_NOERROR)
1682 infra_update_tcp_works(sq->outnet->infra, &sq->addr,
1683 sq->addrlen, sq->zone, sq->zonelen);
1685 if(error==NETEVENT_NOERROR && sq->outnet->dtenv &&
1686 (sq->outnet->dtenv->log_resolver_response_messages ||
1687 sq->outnet->dtenv->log_forwarder_response_messages))
1688 dt_msg_send_outside_response(sq->outnet->dtenv, &sq->addr,
1689 c->type, sq->zone, sq->zonelen, sq->qbuf, sq->qbuflen,
1690 &sq->last_sent_time, sq->outnet->now_tv, c->buffer);
1692 if(error==NETEVENT_NOERROR && sq->status == serviced_query_TCP_EDNS &&
1693 (LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer)) ==
1694 LDNS_RCODE_FORMERR || LDNS_RCODE_WIRE(sldns_buffer_begin(
1695 c->buffer)) == LDNS_RCODE_NOTIMPL) ) {
1696 /* attempt to fallback to nonEDNS */
1697 sq->status = serviced_query_TCP_EDNS_fallback;
1698 serviced_tcp_initiate(sq, c->buffer);
1700 } else if(error==NETEVENT_NOERROR &&
1701 sq->status == serviced_query_TCP_EDNS_fallback &&
1702 (LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer)) ==
1703 LDNS_RCODE_NOERROR || LDNS_RCODE_WIRE(
1704 sldns_buffer_begin(c->buffer)) == LDNS_RCODE_NXDOMAIN
1705 || LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer))
1706 == LDNS_RCODE_YXDOMAIN)) {
1707 /* the fallback produced a result that looks promising, note
1708 * that this server should be approached without EDNS */
1709 /* only store noEDNS in cache if domain is noDNSSEC */
1710 if(!sq->want_dnssec)
1711 if(!infra_edns_update(sq->outnet->infra, &sq->addr,
1712 sq->addrlen, sq->zone, sq->zonelen, -1,
1713 *sq->outnet->now_secs))
1714 log_err("Out of memory caching no edns for host");
1715 sq->status = serviced_query_TCP;
1717 if(sq->tcp_upstream || sq->ssl_upstream) {
1718 struct timeval now = *sq->outnet->now_tv;
1719 if(now.tv_sec > sq->last_sent_time.tv_sec ||
1720 (now.tv_sec == sq->last_sent_time.tv_sec &&
1721 now.tv_usec > sq->last_sent_time.tv_usec)) {
1722 /* convert from microseconds to milliseconds */
1723 int roundtime = ((int)(now.tv_sec - sq->last_sent_time.tv_sec))*1000
1724 + ((int)now.tv_usec - (int)sq->last_sent_time.tv_usec)/1000;
1725 verbose(VERB_ALGO, "measured TCP-time at %d msec", roundtime);
1726 log_assert(roundtime >= 0);
1727 /* only store if less then AUTH_TIMEOUT seconds, it could be
1728 * huge due to system-hibernated and we woke up */
1729 if(roundtime < TCP_AUTH_QUERY_TIMEOUT*1000) {
1730 if(!infra_rtt_update(sq->outnet->infra, &sq->addr,
1731 sq->addrlen, sq->zone, sq->zonelen, sq->qtype,
1732 roundtime, sq->last_rtt, (time_t)now.tv_sec))
1733 log_err("out of memory noting rtt.");
1737 /* insert address into reply info */
1739 /* create one if there isn't (on errors) */
1743 memcpy(&rep->addr, &sq->addr, sq->addrlen);
1744 rep->addrlen = sq->addrlen;
1745 serviced_callbacks(sq, error, c, rep);
1750 serviced_tcp_initiate(struct serviced_query* sq, sldns_buffer* buff)
1752 verbose(VERB_ALGO, "initiate TCP query %s",
1753 sq->status==serviced_query_TCP_EDNS?"EDNS":"");
1754 serviced_encode(sq, buff, sq->status == serviced_query_TCP_EDNS);
1755 sq->last_sent_time = *sq->outnet->now_tv;
1756 sq->pending = pending_tcp_query(sq, buff, TCP_AUTH_QUERY_TIMEOUT,
1757 serviced_tcp_callback, sq);
1759 /* delete from tree so that a retry by above layer does not
1760 * clash with this entry */
1761 log_err("serviced_tcp_initiate: failed to send tcp query");
1762 serviced_callbacks(sq, NETEVENT_CLOSED, NULL, NULL);
1766 /** Send serviced query over TCP return false on initial failure */
1768 serviced_tcp_send(struct serviced_query* sq, sldns_buffer* buff)
1771 uint8_t edns_lame_known;
1772 if(!infra_host(sq->outnet->infra, &sq->addr, sq->addrlen, sq->zone,
1773 sq->zonelen, *sq->outnet->now_secs, &vs, &edns_lame_known,
1777 sq->status = serviced_query_TCP_EDNS;
1778 else sq->status = serviced_query_TCP;
1779 serviced_encode(sq, buff, sq->status == serviced_query_TCP_EDNS);
1780 sq->last_sent_time = *sq->outnet->now_tv;
1781 sq->pending = pending_tcp_query(sq, buff, TCP_AUTH_QUERY_TIMEOUT,
1782 serviced_tcp_callback, sq);
1783 return sq->pending != NULL;
1786 /* see if packet is edns malformed; got zeroes at start.
1787 * This is from servers that return malformed packets to EDNS0 queries,
1788 * but they return good packets for nonEDNS0 queries.
1789 * We try to detect their output; without resorting to a full parse or
1790 * check for too many bytes after the end of the packet. */
1792 packet_edns_malformed(struct sldns_buffer* buf, int qtype)
1795 if(sldns_buffer_limit(buf) < LDNS_HEADER_SIZE)
1796 return 1; /* malformed */
1797 /* they have NOERROR rcode, 1 answer. */
1798 if(LDNS_RCODE_WIRE(sldns_buffer_begin(buf)) != LDNS_RCODE_NOERROR)
1800 /* one query (to skip) and answer records */
1801 if(LDNS_QDCOUNT(sldns_buffer_begin(buf)) != 1 ||
1802 LDNS_ANCOUNT(sldns_buffer_begin(buf)) == 0)
1805 len = dname_valid(sldns_buffer_at(buf, LDNS_HEADER_SIZE),
1806 sldns_buffer_limit(buf)-LDNS_HEADER_SIZE);
1809 if(len == 1 && qtype == 0)
1810 return 0; /* we asked for '.' and type 0 */
1811 /* and then 4 bytes (type and class of query) */
1812 if(sldns_buffer_limit(buf) < LDNS_HEADER_SIZE + len + 4 + 3)
1815 /* and start with 11 zeroes as the answer RR */
1816 /* so check the qtype of the answer record, qname=0, type=0 */
1817 if(sldns_buffer_at(buf, LDNS_HEADER_SIZE+len+4)[0] == 0 &&
1818 sldns_buffer_at(buf, LDNS_HEADER_SIZE+len+4)[1] == 0 &&
1819 sldns_buffer_at(buf, LDNS_HEADER_SIZE+len+4)[2] == 0)
1825 serviced_udp_callback(struct comm_point* c, void* arg, int error,
1826 struct comm_reply* rep)
1828 struct serviced_query* sq = (struct serviced_query*)arg;
1829 struct outside_network* outnet = sq->outnet;
1830 struct timeval now = *sq->outnet->now_tv;
1831 int fallback_tcp = 0;
1833 sq->pending = NULL; /* removed after callback */
1834 if(error == NETEVENT_TIMEOUT) {
1836 if(sq->status == serviced_query_PROBE_EDNS) {
1837 /* non-EDNS probe failed; we do not know its status,
1838 * keep trying with EDNS, timeout may not be caused
1840 sq->status = serviced_query_UDP_EDNS;
1842 if(sq->status == serviced_query_UDP_EDNS && sq->last_rtt < 5000) {
1843 /* fallback to 1480/1280 */
1844 sq->status = serviced_query_UDP_EDNS_FRAG;
1845 log_name_addr(VERB_ALGO, "try edns1xx0", sq->qbuf+10,
1846 &sq->addr, sq->addrlen);
1847 if(!serviced_udp_send(sq, c->buffer)) {
1848 serviced_callbacks(sq, NETEVENT_CLOSED, c, rep);
1852 if(sq->status == serviced_query_UDP_EDNS_FRAG) {
1853 /* fragmentation size did not fix it */
1854 sq->status = serviced_query_UDP_EDNS;
1857 if(!(rto=infra_rtt_update(outnet->infra, &sq->addr, sq->addrlen,
1858 sq->zone, sq->zonelen, sq->qtype, -1, sq->last_rtt,
1859 (time_t)now.tv_sec)))
1860 log_err("out of memory in UDP exponential backoff");
1861 if(sq->retry < OUTBOUND_UDP_RETRY) {
1862 log_name_addr(VERB_ALGO, "retry query", sq->qbuf+10,
1863 &sq->addr, sq->addrlen);
1864 if(!serviced_udp_send(sq, c->buffer)) {
1865 serviced_callbacks(sq, NETEVENT_CLOSED, c, rep);
1869 if(rto >= RTT_MAX_TIMEOUT) {
1871 /* UDP does not work, fallback to TCP below */
1873 serviced_callbacks(sq, NETEVENT_TIMEOUT, c, rep);
1876 } else if(error != NETEVENT_NOERROR) {
1877 /* udp returns error (due to no ID or interface available) */
1878 serviced_callbacks(sq, error, c, rep);
1883 (outnet->dtenv->log_resolver_response_messages ||
1884 outnet->dtenv->log_forwarder_response_messages))
1885 dt_msg_send_outside_response(outnet->dtenv, &sq->addr, c->type,
1886 sq->zone, sq->zonelen, sq->qbuf, sq->qbuflen,
1887 &sq->last_sent_time, sq->outnet->now_tv, c->buffer);
1890 if( (sq->status == serviced_query_UDP_EDNS
1891 ||sq->status == serviced_query_UDP_EDNS_FRAG)
1892 && (LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer))
1893 == LDNS_RCODE_FORMERR || LDNS_RCODE_WIRE(
1894 sldns_buffer_begin(c->buffer)) == LDNS_RCODE_NOTIMPL
1895 || packet_edns_malformed(c->buffer, sq->qtype)
1897 /* try to get an answer by falling back without EDNS */
1898 verbose(VERB_ALGO, "serviced query: attempt without EDNS");
1899 sq->status = serviced_query_UDP_EDNS_fallback;
1901 if(!serviced_udp_send(sq, c->buffer)) {
1902 serviced_callbacks(sq, NETEVENT_CLOSED, c, rep);
1905 } else if(sq->status == serviced_query_PROBE_EDNS) {
1906 /* probe without EDNS succeeds, so we conclude that this
1907 * host likely has EDNS packets dropped */
1908 log_addr(VERB_DETAIL, "timeouts, concluded that connection to "
1909 "host drops EDNS packets", &sq->addr, sq->addrlen);
1910 /* only store noEDNS in cache if domain is noDNSSEC */
1911 if(!sq->want_dnssec)
1912 if(!infra_edns_update(outnet->infra, &sq->addr, sq->addrlen,
1913 sq->zone, sq->zonelen, -1, (time_t)now.tv_sec)) {
1914 log_err("Out of memory caching no edns for host");
1916 sq->status = serviced_query_UDP;
1917 } else if(sq->status == serviced_query_UDP_EDNS &&
1918 !sq->edns_lame_known) {
1919 /* now we know that edns queries received answers store that */
1920 log_addr(VERB_ALGO, "serviced query: EDNS works for",
1921 &sq->addr, sq->addrlen);
1922 if(!infra_edns_update(outnet->infra, &sq->addr, sq->addrlen,
1923 sq->zone, sq->zonelen, 0, (time_t)now.tv_sec)) {
1924 log_err("Out of memory caching edns works");
1926 sq->edns_lame_known = 1;
1927 } else if(sq->status == serviced_query_UDP_EDNS_fallback &&
1928 !sq->edns_lame_known && (LDNS_RCODE_WIRE(
1929 sldns_buffer_begin(c->buffer)) == LDNS_RCODE_NOERROR ||
1930 LDNS_RCODE_WIRE(sldns_buffer_begin(c->buffer)) ==
1931 LDNS_RCODE_NXDOMAIN || LDNS_RCODE_WIRE(sldns_buffer_begin(
1932 c->buffer)) == LDNS_RCODE_YXDOMAIN)) {
1933 /* the fallback produced a result that looks promising, note
1934 * that this server should be approached without EDNS */
1935 /* only store noEDNS in cache if domain is noDNSSEC */
1936 if(!sq->want_dnssec) {
1937 log_addr(VERB_ALGO, "serviced query: EDNS fails for",
1938 &sq->addr, sq->addrlen);
1939 if(!infra_edns_update(outnet->infra, &sq->addr, sq->addrlen,
1940 sq->zone, sq->zonelen, -1, (time_t)now.tv_sec)) {
1941 log_err("Out of memory caching no edns for host");
1944 log_addr(VERB_ALGO, "serviced query: EDNS fails, but "
1945 "not stored because need DNSSEC for", &sq->addr,
1948 sq->status = serviced_query_UDP;
1950 if(now.tv_sec > sq->last_sent_time.tv_sec ||
1951 (now.tv_sec == sq->last_sent_time.tv_sec &&
1952 now.tv_usec > sq->last_sent_time.tv_usec)) {
1953 /* convert from microseconds to milliseconds */
1954 int roundtime = ((int)(now.tv_sec - sq->last_sent_time.tv_sec))*1000
1955 + ((int)now.tv_usec - (int)sq->last_sent_time.tv_usec)/1000;
1956 verbose(VERB_ALGO, "measured roundtrip at %d msec", roundtime);
1957 log_assert(roundtime >= 0);
1958 /* in case the system hibernated, do not enter a huge value,
1959 * above this value gives trouble with server selection */
1960 if(roundtime < 60000) {
1961 if(!infra_rtt_update(outnet->infra, &sq->addr, sq->addrlen,
1962 sq->zone, sq->zonelen, sq->qtype, roundtime,
1963 sq->last_rtt, (time_t)now.tv_sec))
1964 log_err("out of memory noting rtt.");
1967 } /* end of if_!fallback_tcp */
1968 /* perform TC flag check and TCP fallback after updating our
1969 * cache entries for EDNS status and RTT times */
1970 if(LDNS_TC_WIRE(sldns_buffer_begin(c->buffer)) || fallback_tcp) {
1971 /* fallback to TCP */
1972 /* this discards partial UDP contents */
1973 if(sq->status == serviced_query_UDP_EDNS ||
1974 sq->status == serviced_query_UDP_EDNS_FRAG ||
1975 sq->status == serviced_query_UDP_EDNS_fallback)
1976 /* if we have unfinished EDNS_fallback, start again */
1977 sq->status = serviced_query_TCP_EDNS;
1978 else sq->status = serviced_query_TCP;
1979 serviced_tcp_initiate(sq, c->buffer);
1982 /* yay! an answer */
1983 serviced_callbacks(sq, error, c, rep);
1987 struct serviced_query*
1988 outnet_serviced_query(struct outside_network* outnet,
1989 uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass,
1990 uint16_t flags, int dnssec, int want_dnssec, int nocaps,
1991 int tcp_upstream, int ssl_upstream, struct edns_option* opt_list,
1992 struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
1993 size_t zonelen, comm_point_callback_t* callback, void* callback_arg,
1996 struct serviced_query* sq;
1997 struct service_callback* cb;
1998 serviced_gen_query(buff, qname, qnamelen, qtype, qclass, flags);
1999 sq = lookup_serviced(outnet, buff, dnssec, addr, addrlen, opt_list);
2000 /* duplicate entries are included in the callback list, because
2001 * there is a counterpart registration by our caller that needs to
2002 * be doubly-removed (with callbacks perhaps). */
2003 if(!(cb = (struct service_callback*)malloc(sizeof(*cb))))
2006 /* make new serviced query entry */
2007 sq = serviced_create(outnet, buff, dnssec, want_dnssec, nocaps,
2008 tcp_upstream, ssl_upstream, addr, addrlen, zone,
2009 zonelen, (int)qtype, opt_list);
2014 /* perform first network action */
2015 if(outnet->do_udp && !(tcp_upstream || ssl_upstream)) {
2016 if(!serviced_udp_send(sq, buff)) {
2017 (void)rbtree_delete(outnet->serviced, sq);
2025 if(!serviced_tcp_send(sq, buff)) {
2026 (void)rbtree_delete(outnet->serviced, sq);
2035 /* add callback to list of callbacks */
2037 cb->cb_arg = callback_arg;
2038 cb->next = sq->cblist;
2043 /** remove callback from list */
2045 callback_list_remove(struct serviced_query* sq, void* cb_arg)
2047 struct service_callback** pp = &sq->cblist;
2049 if((*pp)->cb_arg == cb_arg) {
2050 struct service_callback* del = *pp;
2059 void outnet_serviced_query_stop(struct serviced_query* sq, void* cb_arg)
2063 callback_list_remove(sq, cb_arg);
2064 /* if callbacks() routine scheduled deletion, let it do that */
2065 if(!sq->cblist && !sq->to_be_deleted) {
2066 (void)rbtree_delete(sq->outnet->serviced, sq);
2067 serviced_delete(sq);
2071 /** get memory used by waiting tcp entry (in use or not) */
2073 waiting_tcp_get_mem(struct waiting_tcp* w)
2077 s = sizeof(*w) + w->pkt_len;
2079 s += comm_timer_get_mem(w->timer);
2083 /** get memory used by port if */
2085 if_get_mem(struct port_if* pif)
2089 s = sizeof(*pif) + sizeof(int)*pif->avail_total +
2090 sizeof(struct port_comm*)*pif->maxout;
2091 for(i=0; i<pif->inuse; i++)
2092 s += sizeof(*pif->out[i]) +
2093 comm_point_get_mem(pif->out[i]->cp);
2097 /** get memory used by waiting udp */
2099 waiting_udp_get_mem(struct pending* w)
2102 s = sizeof(*w) + comm_timer_get_mem(w->timer) + w->pkt_len;
2106 size_t outnet_get_mem(struct outside_network* outnet)
2110 struct waiting_tcp* w;
2112 struct serviced_query* sq;
2113 struct service_callback* sb;
2114 struct port_comm* pc;
2115 size_t s = sizeof(*outnet) + sizeof(*outnet->base) +
2116 sizeof(*outnet->udp_buff) +
2117 sldns_buffer_capacity(outnet->udp_buff);
2118 /* second buffer is not ours */
2119 for(pc = outnet->unused_fds; pc; pc = pc->next) {
2120 s += sizeof(*pc) + comm_point_get_mem(pc->cp);
2122 for(k=0; k<outnet->num_ip4; k++)
2123 s += if_get_mem(&outnet->ip4_ifs[k]);
2124 for(k=0; k<outnet->num_ip6; k++)
2125 s += if_get_mem(&outnet->ip6_ifs[k]);
2126 for(u=outnet->udp_wait_first; u; u=u->next_waiting)
2127 s += waiting_udp_get_mem(u);
2129 s += sizeof(struct pending_tcp*)*outnet->num_tcp;
2130 for(i=0; i<outnet->num_tcp; i++) {
2131 s += sizeof(struct pending_tcp);
2132 s += comm_point_get_mem(outnet->tcp_conns[i]->c);
2133 if(outnet->tcp_conns[i]->query)
2134 s += waiting_tcp_get_mem(outnet->tcp_conns[i]->query);
2136 for(w=outnet->tcp_wait_first; w; w = w->next_waiting)
2137 s += waiting_tcp_get_mem(w);
2138 s += sizeof(*outnet->pending);
2139 s += (sizeof(struct pending) + comm_timer_get_mem(NULL)) *
2140 outnet->pending->count;
2141 s += sizeof(*outnet->serviced);
2142 s += outnet->svcd_overhead;
2143 RBTREE_FOR(sq, struct serviced_query*, outnet->serviced) {
2144 s += sizeof(*sq) + sq->qbuflen;
2145 for(sb = sq->cblist; sb; sb = sb->next)
2152 serviced_get_mem(struct serviced_query* sq)
2154 struct service_callback* sb;
2156 s = sizeof(*sq) + sq->qbuflen;
2157 for(sb = sq->cblist; sb; sb = sb->next)
2159 if(sq->status == serviced_query_UDP_EDNS ||
2160 sq->status == serviced_query_UDP ||
2161 sq->status == serviced_query_PROBE_EDNS ||
2162 sq->status == serviced_query_UDP_EDNS_FRAG ||
2163 sq->status == serviced_query_UDP_EDNS_fallback) {
2164 s += sizeof(struct pending);
2165 s += comm_timer_get_mem(NULL);
2167 /* does not have size of the pkt pointer */
2168 /* always has a timer except on malloc failures */
2170 /* these sizes are part of the main outside network mem */
2172 s += sizeof(struct waiting_tcp);
2173 s += comm_timer_get_mem(NULL);