neighbors.cc
Go to the documentation of this file.
1/*
2 * Copyright (C) 1996-2022 The Squid Software Foundation and contributors
3 *
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
7 */
8
9/* DEBUG: section 15 Neighbor Routines */
10
11#include "squid.h"
12#include "acl/FilledChecklist.h"
13#include "anyp/PortCfg.h"
14#include "base/EnumIterator.h"
15#include "CacheDigest.h"
16#include "CachePeer.h"
17#include "comm/Connection.h"
18#include "comm/ConnOpener.h"
19#include "debug/Messages.h"
20#include "event.h"
21#include "FwdState.h"
22#include "globals.h"
23#include "htcp.h"
24#include "HttpRequest.h"
25#include "icmp/net_db.h"
26#include "ICP.h"
27#include "int.h"
28#include "ip/Address.h"
29#include "ip/tools.h"
30#include "ipcache.h"
31#include "MemObject.h"
32#include "mgr/Registration.h"
33#include "multicast.h"
34#include "neighbors.h"
36#include "pconn.h"
37#include "PeerDigest.h"
38#include "PeerPoolMgr.h"
39#include "PeerSelectState.h"
40#include "RequestFlags.h"
41#include "SquidConfig.h"
42#include "SquidMath.h"
43#include "stat.h"
44#include "Store.h"
45#include "store_key_md5.h"
46#include "tools.h"
47
48/* count mcast group peers every 15 minutes */
49#define MCAST_COUNT_RATE 900
50
52static int peerWouldBePinged(const CachePeer *, PeerSelector *);
53static void neighborRemove(CachePeer *);
54static void neighborAlive(CachePeer *, const MemObject *, const icp_common_t *);
55#if USE_HTCP
56static void neighborAliveHtcp(CachePeer *, const MemObject *, const HtcpReplyData *);
57#endif
58static void neighborCountIgnored(CachePeer *);
59static void peerRefreshDNS(void *);
61static void peerProbeConnect(CachePeer *, const bool reprobeIfBusy = false);
63static void peerCountMcastPeersDone(void *data);
64static void peerCountMcastPeersStart(void *data);
65static void peerCountMcastPeersSchedule(CachePeer * p, time_t when);
69
70static void neighborIgnoreNonPeer(const Ip::Address &, icp_opcode);
73static void dump_peers(StoreEntry * sentry, CachePeer * peers);
74
75static unsigned short echo_port;
76
77static int NLateReplies = 0;
78static CachePeer *first_ping = nullptr;
79
80const char *
82{
83 if (p->type == PEER_NONE)
84 return "Non-Peer";
85
86 if (p->type == PEER_SIBLING)
87 return "Sibling";
88
89 if (p->type == PEER_MULTICAST)
90 return "Multicast Group";
91
92 return "Parent";
93}
94
97{
98 int j;
99
100 CachePeer *p = nullptr;
101 debugs(15, 3, "whichPeer: from " << from);
102
103 for (p = Config.peers; p; p = p->next) {
104 for (j = 0; j < p->n_addresses; ++j) {
105 if (from == p->addresses[j] && from.port() == p->icp.port) {
106 return p;
107 }
108 }
109 }
110
111 return nullptr;
112}
113
114peer_t
115neighborType(const CachePeer * p, const AnyP::Uri &url)
116{
117
118 const NeighborTypeDomainList *d = nullptr;
119
120 for (d = p->typelist; d; d = d->next) {
121 if (0 == matchDomainName(url.host(), d->domain))
122 if (d->type != PEER_NONE)
123 return d->type;
124 }
125#if PEER_MULTICAST_SIBLINGS
126 if (p->type == PEER_MULTICAST)
127 if (p->options.mcast_siblings)
128 return PEER_SIBLING;
129#endif
130
131 return p->type;
132}
133
137bool
139{
140 assert(ps);
142 assert(request != nullptr);
143
144 if (neighborType(p, request->url) == PEER_SIBLING) {
145#if PEER_MULTICAST_SIBLINGS
146 if (p->type == PEER_MULTICAST && p->options.mcast_siblings &&
147 (request->flags.noCache || request->flags.refresh || request->flags.loopDetected || request->flags.needValidation))
148 debugs(15, 2, "peerAllowedToUse(" << p->name << ", " << request->url.authority() << ") : multicast-siblings optimization match");
149#endif
150 if (request->flags.noCache)
151 return false;
152
153 if (request->flags.refresh)
154 return false;
155
156 if (request->flags.loopDetected)
157 return false;
158
159 if (request->flags.needValidation)
160 return false;
161 }
162
163 // CONNECT requests are proxy requests. Not to be forwarded to origin servers.
164 // Unless the destination port matches, in which case we MAY perform a 'DIRECT' to this CachePeer.
166 return false;
167
168 if (p->access == nullptr)
169 return true;
170
171 ACLFilledChecklist checklist(p->access, request, nullptr);
172 checklist.al = ps->al;
173 if (ps->al && ps->al->reply) {
174 checklist.reply = ps->al->reply.getRaw();
175 HTTPMSGLOCK(checklist.reply);
176 }
177 checklist.syncAle(request, nullptr);
178 return checklist.fastCheck().allowed();
179}
180
181/* Return TRUE if it is okay to send an ICP request to this CachePeer. */
182static int
184{
185 assert(ps);
187
188 if (p->icp.port == 0)
189 return 0;
190
191 if (p->options.no_query)
192 return 0;
193
195 return 0;
196
197 if (p->n_addresses == 0)
198 return 0;
199
201 return 0;
202
203 /* the case below seems strange, but can happen if the
204 * URL host is on the other side of a firewall */
205 if (p->type == PEER_SIBLING)
206 if (!request->flags.hierarchical)
207 return 0;
208
209 if (!peerAllowedToUse(p, ps))
210 return 0;
211
212 /* Ping dead peers every timeout interval */
214 return 1;
215
216 if (!neighborUp(p))
217 return 0;
218
219 return 1;
220}
221
222bool
224{
225 const int effectiveLimit = p->max_conn <= 0 ? Squid_MaxFD : p->max_conn;
226 const int remaining = effectiveLimit - p->stats.conn_open;
227 debugs(15, 7, remaining << '=' << effectiveLimit << '-' << p->stats.conn_open);
228 return remaining > 0;
229}
230
231bool
233{
234 // Standby connections can be used without opening new connections.
235 const int standbys = p->standby.pool ? p->standby.pool->count() : 0;
236
237 // XXX: Some idle pconns can be used without opening new connections.
238 // Complication: Idle pconns cannot be reused for some requests.
239 const int usableIdles = 0;
240
241 const int available = standbys + usableIdles;
242 debugs(15, 7, available << '=' << standbys << '+' << usableIdles);
243 return available > 0;
244}
245
246void
248{
249 --p->stats.conn_open;
251 p->standby.waitingForClose = false;
252 PeerPoolMgr::Checkpoint(p->standby.mgr, "conn closed");
253 }
254}
255
256/* Return TRUE if it is okay to send an HTTP request to this CachePeer. */
257int
259{
261 return 0;
262
263 if (!peerAllowedToUse(p, ps))
264 return 0;
265
266 if (!neighborUp(p))
267 return 0;
268
269 return 1;
270}
271
272int
274{
275 CachePeer *p = nullptr;
276 int count = 0;
277
278 for (p = Config.peers; p; p = p->next)
279 if (peerWouldBePinged(p, ps))
280 ++count;
281
282 debugs(15, 3, "neighborsCount: " << count);
283
284 return count;
285}
286
287CachePeer *
289{
290 assert(ps);
292
293 CachePeer *p = nullptr;
294
295 for (p = Config.peers; p; p = p->next) {
296 if (!neighborUp(p))
297 continue;
298
300 continue;
301
302 if (!peerHTTPOkay(p, ps))
303 continue;
304
305 break;
306 }
307
308 debugs(15, 3, "getFirstUpParent: returning " << (p ? p->host : "NULL"));
309 return p;
310}
311
312CachePeer *
314{
315 assert(ps);
317
318 CachePeer *p;
319 CachePeer *q = nullptr;
320
321 for (p = Config.peers; p; p = p->next) {
322 if (!p->options.roundrobin)
323 continue;
324
326 continue;
327
328 if (!peerHTTPOkay(p, ps))
329 continue;
330
331 if (p->weight == 0)
332 continue;
333
334 if (q) {
335 if (p->weight == q->weight) {
336 if (q->rr_count < p->rr_count)
337 continue;
338 } else if ( ((double) q->rr_count / q->weight) < ((double) p->rr_count / p->weight)) {
339 continue;
340 }
341 }
342
343 q = p;
344 }
345
346 if (q)
347 ++ q->rr_count;
348
349 debugs(15, 3, "returning " << (q ? q->host : "NULL"));
350
351 return q;
352}
353
354CachePeer *
356{
357 assert(ps);
359
360 CachePeer *p;
361 CachePeer *q = nullptr;
362 int weighted_rtt;
363
364 for (p = Config.peers; p; p = p->next) {
366 continue;
367
369 continue;
370
371 if (!peerHTTPOkay(p, ps))
372 continue;
373
374 if (q && q->rr_count < p->rr_count)
375 continue;
376
377 q = p;
378 }
379
380 if (q && q->rr_count > 1000000)
381 for (p = Config.peers; p; p = p->next) {
383 continue;
384
386 continue;
387
388 p->rr_count = 0;
389 }
390
391 if (q) {
392 weighted_rtt = (q->stats.rtt - q->basetime) / q->weight;
393
394 if (weighted_rtt < 1)
395 weighted_rtt = 1;
396
397 q->rr_count += weighted_rtt;
398
399 debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt);
400 }
401
402 debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q ? q->host : "NULL"));
403 return q;
404}
405
417static void
419{
420 peerClearRR();
421 eventAdd("peerClearRR", peerClearRRLoop, data, 5 * 60.0, 0);
422}
423
429void
431{
432 static bool event_added = false;
433 if (!event_added) {
434 peerClearRRLoop(nullptr);
435 event_added=true;
436 }
437}
438
446void
448{
449 CachePeer *p = nullptr;
450 for (p = Config.peers; p; p = p->next) {
451 p->rr_count = 1;
452 }
453}
454
458static void
460{
461 if (p->stats.logged_state == PEER_DEAD && p->tcp_up) {
462 debugs(15, DBG_IMPORTANT, "Detected REVIVED " << neighborTypeStr(p) << ": " << p->name);
464 peerClearRR();
465 if (p->standby.mgr.valid())
466 PeerPoolMgr::Checkpoint(p->standby.mgr, "revived peer");
467 }
468
470 p->stats.probe_start = 0;
471}
472
473CachePeer *
475{
476 assert(ps);
478
479 CachePeer *p = nullptr;
480
481 for (p = Config.peers; p; p = p->next) {
483 continue;
484
485 if (!p->options.default_parent)
486 continue;
487
488 if (!peerHTTPOkay(p, ps))
489 continue;
490
491 debugs(15, 3, "getDefaultParent: returning " << p->host);
492
493 return p;
494 }
495
496 debugs(15, 3, "getDefaultParent: returning NULL");
497 return nullptr;
498}
499
500CachePeer *
502{
503 return p->next;
504}
505
506CachePeer *
508{
509 return Config.peers;
510}
511
512static void
514{
515 CachePeer *p = nullptr;
516 CachePeer **P = nullptr;
517 p = Config.peers;
518 P = &Config.peers;
519
520 while (p) {
521 if (target == p)
522 break;
523
524 P = &p->next;
525
526 p = p->next;
527 }
528
529 if (p) {
530 *P = p->next;
531 p->next = nullptr;
532 delete p;
533 --Config.npeers;
534 }
535
537}
538
539static void
541{
542 Mgr::RegisterAction("server_list",
543 "Peer Cache Statistics",
544 neighborDumpPeers, 0, 1);
545
547 Mgr::RegisterAction("non_peers",
548 "List of Unknown sites sending ICP messages",
550 }
551}
552
553void
555{
556 struct servent *sep = nullptr;
557 const char *me = getMyHostname();
558 CachePeer *thisPeer = nullptr;
559 CachePeer *next = nullptr;
560
562
564
565 for (thisPeer = Config.peers; thisPeer; thisPeer = next) {
566 next = thisPeer->next;
567
568 if (0 != strcmp(thisPeer->host, me))
569 continue;
570
571 for (AnyP::PortCfgPointer s = HttpPortList; s != nullptr; s = s->next) {
572 if (thisPeer->http_port != s->s.port())
573 continue;
574
575 debugs(15, DBG_IMPORTANT, "WARNING: Peer looks like this host." <<
576 Debug::Extra << "Ignoring " <<
577 neighborTypeStr(thisPeer) << " " << thisPeer->host <<
578 "/" << thisPeer->http_port << "/" <<
579 thisPeer->icp.port);
580
581 neighborRemove(thisPeer);
582 }
583 }
584 }
585
586 peerRefreshDNS((void *) 1);
587
588 sep = getservbyname("echo", "udp");
589 echo_port = sep ? ntohs((unsigned short) sep->s_port) : 7;
590
592}
593
594int
596 StoreEntry * entry,
597 IRCB * callback,
598 PeerSelector *ps,
599 int *exprep,
600 int *timeout)
601{
602 const char *url = entry->url();
603 MemObject *mem = entry->mem_obj;
604 CachePeer *p = nullptr;
605 int i;
606 int reqnum = 0;
607 int flags;
608 int queries_sent = 0;
609 int peers_pinged = 0;
610 int parent_timeout = 0, parent_exprep = 0;
611 int sibling_timeout = 0, sibling_exprep = 0;
612 int mcast_timeout = 0, mcast_exprep = 0;
613
614 if (Config.peers == nullptr)
615 return 0;
616
617 assert(!entry->hasDisk());
618
620
621 mem->ping_reply_callback = callback;
622
623 mem->ircb_data = ps;
624
625 reqnum = icpSetCacheKey((const cache_key *)entry->key);
626
627 for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) {
628 if (p == nullptr)
629 p = Config.peers;
630
631 debugs(15, 5, "neighborsUdpPing: Peer " << p->host);
632
633 if (!peerWouldBePinged(p, ps))
634 continue; /* next CachePeer */
635
636 ++peers_pinged;
637
638 debugs(15, 4, "neighborsUdpPing: pinging peer " << p->host << " for '" << url << "'");
639
640 debugs(15, 3, "neighborsUdpPing: key = '" << entry->getMD5Text() << "'");
641
642 debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum);
643
644#if USE_HTCP
645 if (p->options.htcp && !p->options.htcp_only_clr) {
646 if (Config.Port.htcp <= 0) {
647 debugs(15, DBG_CRITICAL, "ERROR: HTCP is disabled! Cannot send HTCP request to peer.");
648 continue;
649 }
650
651 debugs(15, 3, "neighborsUdpPing: sending HTCP query");
652 if (htcpQuery(entry, request, p) <= 0)
653 continue; // unable to send.
654 } else
655#endif
656 {
658 debugs(15, DBG_CRITICAL, "ERROR: ICP is disabled! Cannot send ICP request to peer.");
659 continue;
660 } else {
661
662 if (p->type == PEER_MULTICAST)
664
665 if (p->icp.port == echo_port) {
666 debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping");
667 // TODO: Get ALE from callback_data if possible.
668 icpCreateAndSend(ICP_DECHO, 0, url, reqnum, 0,
669 icpOutgoingConn->fd, p->in_addr, nullptr);
670 } else {
671 flags = 0;
672
674 if (p->icp.version == ICP_VERSION_2)
675 flags |= ICP_FLAG_SRC_RTT;
676
677 // TODO: Get ALE from callback_data if possible.
678 icpCreateAndSend(ICP_QUERY, flags, url, reqnum, 0,
679 icpOutgoingConn->fd, p->in_addr, nullptr);
680 }
681 }
682 }
683
684 ++queries_sent;
685
686 ++ p->stats.pings_sent;
687
688 if (p->type == PEER_MULTICAST) {
689 mcast_exprep += p->mcast.n_replies_expected;
690 mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected);
691 } else if (neighborUp(p)) {
692 /* its alive, expect a reply from it */
693
694 if (neighborType(p, request->url) == PEER_PARENT) {
695 ++parent_exprep;
696 parent_timeout += p->stats.rtt;
697 } else {
698 ++sibling_exprep;
699 sibling_timeout += p->stats.rtt;
700 }
701 } else {
702 /* Neighbor is dead; ping it anyway, but don't expect a reply */
703 /* log it once at the threshold */
704
705 if (p->stats.logged_state == PEER_ALIVE) {
706 debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name);
708 }
709 }
710
712
713 /*
714 * keep probe_start == 0 for a multicast CachePeer,
715 * so neighborUp() never says this CachePeer is dead.
716 */
717
718 if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0))
720 }
721
722 if ((first_ping = first_ping->next) == nullptr)
724
725 /*
726 * How many replies to expect?
727 */
728 *exprep = parent_exprep + sibling_exprep + mcast_exprep;
729
730 /*
731 * If there is a configured timeout, use it
732 */
734 *timeout = Config.Timeout.icp_query;
735 else {
736 if (*exprep > 0) {
737 if (parent_exprep)
738 *timeout = 2 * parent_timeout / parent_exprep;
739 else if (mcast_exprep)
740 *timeout = 2 * mcast_timeout / mcast_exprep;
741 else
742 *timeout = 2 * sibling_timeout / sibling_exprep;
743 } else
744 *timeout = 2000; /* 2 seconds */
745
747 if (*timeout > Config.Timeout.icp_query_max)
748 *timeout = Config.Timeout.icp_query_max;
749
750 if (*timeout < Config.Timeout.icp_query_min)
751 *timeout = Config.Timeout.icp_query_min;
752 }
753
754 return peers_pinged;
755}
756
757/* lookup the digest of a given CachePeer */
760{
761#if USE_CACHE_DIGESTS
762 assert(ps);
764 const cache_key *key = request ? storeKeyPublicByRequest(request) : nullptr;
765 assert(p);
767 debugs(15, 5, "peerDigestLookup: peer " << p->host);
768 /* does the peeer have a valid digest? */
769
770 if (!p->digest) {
771 debugs(15, 5, "peerDigestLookup: gone!");
772 return LOOKUP_NONE;
773 } else if (!peerHTTPOkay(p, ps)) {
774 debugs(15, 5, "peerDigestLookup: !peerHTTPOkay");
775 return LOOKUP_NONE;
776 } else if (!p->digest->flags.needed) {
777 debugs(15, 5, "peerDigestLookup: note need");
779 return LOOKUP_NONE;
780 } else if (!p->digest->flags.usable) {
781 debugs(15, 5, "peerDigestLookup: !ready && " << (p->digest->flags.requested ? "" : "!") << "requested");
782 return LOOKUP_NONE;
783 }
784
785 debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p->host);
786 assert(p->digest->cd);
787 /* does digest predict a hit? */
788
789 if (!p->digest->cd->contains(key))
790 return LOOKUP_MISS;
791
792 debugs(15, 5, "peerDigestLookup: peer " << p->host << " says HIT!");
793
794 return LOOKUP_HIT;
795#else
796 (void)p;
797 (void)ps;
798#endif
799
800 return LOOKUP_NONE;
801}
802
803/* select best CachePeer based on cache digests */
804CachePeer *
806{
807 CachePeer *best_p = nullptr;
808#if USE_CACHE_DIGESTS
809 assert(ps);
811
812 int best_rtt = 0;
813 int choice_count = 0;
814 int ichoice_count = 0;
815 CachePeer *p;
816 int p_rtt;
817 int i;
818
819 if (!request->flags.hierarchical)
820 return nullptr;
821
823
824 for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) {
825 lookup_t lookup;
826
827 if (!p)
828 p = Config.peers;
829
830 if (i == 1)
831 first_ping = p;
832
833 lookup = peerDigestLookup(p, ps);
834
835 if (lookup == LOOKUP_NONE)
836 continue;
837
838 ++choice_count;
839
840 if (lookup == LOOKUP_MISS)
841 continue;
842
843 p_rtt = netdbHostRtt(p->host);
844
845 debugs(15, 5, "neighborsDigestSelect: peer " << p->host << " rtt: " << p_rtt);
846
847 /* is this CachePeer better than others in terms of rtt ? */
848 if (!best_p || (p_rtt && p_rtt < best_rtt)) {
849 best_p = p;
850 best_rtt = p_rtt;
851
852 if (p_rtt) /* informative choice (aka educated guess) */
853 ++ichoice_count;
854
855 debugs(15, 4, "neighborsDigestSelect: peer " << p->host << " leads with rtt " << best_rtt);
856 }
857 }
858
859 debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count << " (" << ichoice_count << ")");
861 best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE));
862 request->hier.n_choices = choice_count;
863 request->hier.n_ichoices = ichoice_count;
864#else
865 (void)ps;
866#endif
867
868 return best_p;
869}
870
871void
873{
874#if USE_CACHE_DIGESTS
875 if (p)
876 strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)-1);
877 else
878 *request->hier.cd_host = '\0';
879
880 request->hier.cd_lookup = lookup;
881 debugs(15, 4, "peerNoteDigestLookup: peer " << (p? p->host : "<none>") << ", lookup: " << lookup_t_str[lookup] );
882#else
883 (void)request;
884 (void)p;
885 (void)lookup;
886#endif
887}
888
889static void
890neighborAlive(CachePeer * p, const MemObject *, const icp_common_t * header)
891{
892 peerAlive(p);
893 ++ p->stats.pings_acked;
894
895 if ((icp_opcode) header->opcode <= ICP_END)
896 ++ p->icp.counts[header->opcode];
897
898 p->icp.version = (int) header->version;
899}
900
901static void
903{
904 int rtt, rtt_av_factor;
905
906 if (!mem)
907 return;
908
909 if (!mem->start_ping.tv_sec)
910 return;
911
912 rtt = tvSubMsec(mem->start_ping, current_time);
913
914 if (rtt < 1 || rtt > 10000)
915 return;
916
917 rtt_av_factor = RTT_AV_FACTOR;
918
920 rtt_av_factor = RTT_BACKGROUND_AV_FACTOR;
921
922 p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, p->stats.pings_acked, rtt_av_factor);
923}
924
925#if USE_HTCP
926static void
928{
929 peerAlive(p);
930 ++ p->stats.pings_acked;
931 ++ p->htcp.counts[htcp->hit ? 1 : 0];
932 p->htcp.version = htcp->version;
933}
934
935#endif
936
937static void
939{
940 if (p == nullptr)
941 return;
942
944
945 ++NLateReplies;
946}
947
948static CachePeer *non_peers = nullptr;
949
950static void
952{
953 CachePeer *np;
954
955 for (np = non_peers; np; np = np->next) {
956 if (np->in_addr != from)
957 continue;
958
959 if (np->in_addr.port() != from.port())
960 continue;
961
962 break;
963 }
964
965 if (np == nullptr) {
966 np = new CachePeer;
967 np->in_addr = from;
968 np->icp.port = from.port();
969 np->type = PEER_NONE;
970 np->host = new char[MAX_IPSTRLEN];
971 from.toStr(np->host,MAX_IPSTRLEN);
972 np->next = non_peers;
973 non_peers = np;
974 }
975
976 ++ np->icp.counts[opcode];
977
978 if (isPowTen(++np->stats.ignored_replies))
979 debugs(15, DBG_IMPORTANT, "WARNING: Ignored " << np->stats.ignored_replies << " replies from non-peer " << np->host);
980}
981
982/* ignoreMulticastReply
983 *
984 * * We want to ignore replies from multicast peers if the
985 * * cache_host_domain rules would normally prevent the CachePeer
986 * * from being used
987 */
988static int
990{
991 if (p == nullptr)
992 return 0;
993
994 if (!p->options.mcast_responder)
995 return 0;
996
997 if (peerHTTPOkay(p, ps))
998 return 0;
999
1000 return 1;
1001}
1002
1010void
1011neighborsUdpAck(const cache_key * key, icp_common_t * header, const Ip::Address &from)
1012{
1013 CachePeer *p = nullptr;
1014 StoreEntry *entry;
1015 MemObject *mem = nullptr;
1016 peer_t ntype = PEER_NONE;
1017 icp_opcode opcode = (icp_opcode) header->opcode;
1018
1019 debugs(15, 6, "neighborsUdpAck: opcode " << opcode << " '" << storeKeyText(key) << "'");
1020
1021 if ((entry = Store::Root().findCallbackXXX(key)))
1022 mem = entry->mem_obj;
1023
1024 if ((p = whichPeer(from)))
1025 neighborAlive(p, mem, header);
1026
1027 if (opcode > ICP_END)
1028 return;
1029
1030 const char *opcode_d = icp_opcode_str[opcode];
1031
1032 if (p)
1033 neighborUpdateRtt(p, mem);
1034
1035 /* Does the entry exist? */
1036 if (nullptr == entry) {
1037 debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key) << "' not found");
1039 return;
1040 }
1041
1042 /* check if someone is already fetching it */
1043 if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) {
1044 debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched.");
1046 return;
1047 }
1048
1049 if (mem == nullptr) {
1050 debugs(15, 2, "Ignoring " << opcode_d << " for missing mem_obj: " << storeKeyText(key));
1052 return;
1053 }
1054
1055 if (entry->ping_status != PING_WAITING) {
1056 debugs(15, 2, "neighborsUdpAck: Late " << opcode_d << " for " << storeKeyText(key));
1058 return;
1059 }
1060
1061 if (!entry->locked()) {
1062 // TODO: many entries are unlocked; why is this reported at level 1?
1063 debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks");
1065 return;
1066 }
1067
1068 if (!mem->ircb_data) {
1069 debugs(12, DBG_IMPORTANT, "ERROR: Squid BUG: missing ICP callback data for " << *entry);
1071 return;
1072 }
1073
1074 debugs(15, 3, "neighborsUdpAck: " << opcode_d << " for '" << storeKeyText(key) << "' from " << (p ? p->host : "source") << " ");
1075
1076 if (p) {
1077 ntype = neighborType(p, mem->request->url);
1078 }
1079
1080 if (ignoreMulticastReply(p, mem->ircb_data)) {
1082 } else if (opcode == ICP_MISS) {
1083 if (p == nullptr) {
1084 neighborIgnoreNonPeer(from, opcode);
1085 } else {
1086 mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data);
1087 }
1088 } else if (opcode == ICP_HIT) {
1089 if (p == nullptr) {
1090 neighborIgnoreNonPeer(from, opcode);
1091 } else {
1092 header->opcode = ICP_HIT;
1093 mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data);
1094 }
1095 } else if (opcode == ICP_DECHO) {
1096 if (p == nullptr) {
1097 neighborIgnoreNonPeer(from, opcode);
1098 } else if (ntype == PEER_SIBLING) {
1099 debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n");
1100 debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n");
1101 } else {
1102 mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data);
1103 }
1104 } else if (opcode == ICP_SECHO) {
1105 if (p) {
1106 debugs(15, DBG_IMPORTANT, "Ignoring SECHO from neighbor " << p->host);
1108 } else {
1109 debugs(15, DBG_IMPORTANT, "Unsolicited SECHO from " << from);
1110 }
1111 } else if (opcode == ICP_DENIED) {
1112 if (p == nullptr) {
1113 neighborIgnoreNonPeer(from, opcode);
1114 } else if (p->stats.pings_acked > 100) {
1115 if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) {
1116 debugs(15, DBG_CRITICAL, "95%% of replies from '" << p->host << "' are UDP_DENIED");
1117 debugs(15, DBG_CRITICAL, "Disabling '" << p->host << "', please check your configuration.");
1118 neighborRemove(p);
1119 p = nullptr;
1120 } else {
1122 }
1123 }
1124 } else if (opcode == ICP_MISS_NOFETCH) {
1125 mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data);
1126 } else {
1127 debugs(15, DBG_CRITICAL, "ERROR: neighborsUdpAck: Unexpected ICP reply: " << opcode_d);
1128 }
1129}
1130
1131CachePeer *
1132peerFindByName(const char *name)
1133{
1134 CachePeer *p = nullptr;
1135
1136 for (p = Config.peers; p; p = p->next) {
1137 if (!strcasecmp(name, p->name))
1138 break;
1139 }
1140
1141 return p;
1142}
1143
1144CachePeer *
1145peerFindByNameAndPort(const char *name, unsigned short port)
1146{
1147 CachePeer *p = nullptr;
1148
1149 for (p = Config.peers; p; p = p->next) {
1150 if (strcasecmp(name, p->name))
1151 continue;
1152
1153 if (port != p->http_port)
1154 continue;
1155
1156 break;
1157 }
1158
1159 return p;
1160}
1161
1162int
1164{
1165 if (!p->tcp_up) {
1166 peerProbeConnect(const_cast<CachePeer*>(p));
1167 return 0;
1168 }
1169
1170 /*
1171 * The CachePeer can not be UP if we don't have any IP addresses
1172 * for it.
1173 */
1174 if (0 == p->n_addresses) {
1175 debugs(15, 8, "neighborUp: DOWN (no-ip): " << p->host << " (" << p->in_addr << ")");
1176 return 0;
1177 }
1178
1179 if (p->options.no_query) {
1180 debugs(15, 8, "neighborUp: UP (no-query): " << p->host << " (" << p->in_addr << ")");
1181 return 1;
1182 }
1183
1184 if (p->stats.probe_start != 0 &&
1186 debugs(15, 8, "neighborUp: DOWN (dead): " << p->host << " (" << p->in_addr << ")");
1187 return 0;
1188 }
1189
1190 debugs(15, 8, "neighborUp: UP: " << p->host << " (" << p->in_addr << ")");
1191 return 1;
1192}
1193
1194time_t
1195positiveTimeout(const time_t timeout)
1196{
1197 return max(static_cast<time_t>(1), timeout);
1198}
1199
1200static void
1202{
1203 // TODO: connections to no-longer valid IP addresses should be
1204 // closed when we can detect such IP addresses.
1205
1206 CachePeer *p = (CachePeer *)data;
1207
1208 if (p->n_addresses == 0) {
1209 debugs(15, Important(29), "Configuring " << neighborTypeStr(p) << " " << p->host << "/" << p->http_port << "/" << p->icp.port);
1210
1211 if (p->type == PEER_MULTICAST)
1212 debugs(15, DBG_IMPORTANT, " Multicast TTL = " << p->mcast.ttl);
1213 }
1214
1215 p->n_addresses = 0;
1216
1217 if (ia == nullptr) {
1218 debugs(0, DBG_CRITICAL, "WARNING: DNS lookup for '" << p->host << "' failed!");
1219 return;
1220 }
1221
1222 if (ia->empty()) {
1223 debugs(0, DBG_CRITICAL, "WARNING: No IP address found for '" << p->host << "'!");
1224 return;
1225 }
1226
1227 for (const auto &ip: ia->goodAndBad()) { // TODO: Consider using just good().
1229 const auto idx = p->n_addresses++;
1230 p->addresses[idx] = ip;
1231 debugs(15, 2, "--> IP address #" << idx << ": " << p->addresses[idx]);
1232 } else {
1233 debugs(15, 3, "ignoring remaining " << (ia->size() - p->n_addresses) << " ips");
1234 break;
1235 }
1236 }
1237
1238 p->in_addr.setEmpty();
1239 p->in_addr = p->addresses[0];
1240 p->in_addr.port(p->icp.port);
1241
1242 peerProbeConnect(p, true); // detect any died or revived peers ASAP
1243
1244 if (p->type == PEER_MULTICAST)
1246
1247#if USE_ICMP
1248 if (p->type != PEER_MULTICAST && IamWorkerProcess())
1249 if (!p->options.no_netdb_exchange)
1250 eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1);
1251#endif
1252
1253 if (p->standby.mgr.valid())
1254 PeerPoolMgr::Checkpoint(p->standby.mgr, "resolved peer");
1255}
1256
1257static void
1259{
1260 CachePeer *p = nullptr;
1261
1262 if (eventFind(peerRefreshDNS, nullptr))
1263 eventDelete(peerRefreshDNS, nullptr);
1264
1265 if (!data && 0 == stat5minClientRequests()) {
1266 /* no recent client traffic, wait a bit */
1267 eventAddIsh("peerRefreshDNS", peerRefreshDNS, nullptr, 180.0, 1);
1268 return;
1269 }
1270
1271 for (p = Config.peers; p; p = p->next)
1273
1274 /* Reconfigure the peers every hour */
1275 eventAddIsh("peerRefreshDNS", peerRefreshDNS, nullptr, 3600.0, 1);
1276}
1277
1278static void
1280{
1282
1283 if (!p->tcp_up) {
1284 debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port <<
1285 " dead");
1286 return;
1287 }
1288
1289 -- p->tcp_up;
1290
1291 if (!p->tcp_up) {
1292 debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name);
1294 }
1295}
1296
1297void
1299{
1300 debugs(15, DBG_IMPORTANT, "ERROR: TCP connection to " << p->host << "/" << p->http_port << " failed");
1302}
1303
1304void
1306{
1307 if (!p->tcp_up) {
1308 debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << " succeeded");
1309 p->tcp_up = p->connect_fail_limit; // NP: so peerAlive(p) works properly.
1310 peerAlive(p);
1311 if (!p->n_addresses)
1313 } else
1314 p->tcp_up = p->connect_fail_limit;
1315}
1316
1318static bool
1320{
1321 if (p->testing_now > 0) {
1322 debugs(15, 8, "yes, probing " << p);
1323 return true;
1324 }
1325 if (squid_curtime - p->stats.last_connect_probe == 0) {
1326 debugs(15, 8, "yes, just probed " << p);
1327 return true;
1328 }
1329 return false;
1330}
1331/*
1332* peerProbeConnect will be called on dead peers by neighborUp
1333*/
1334static void
1335peerProbeConnect(CachePeer *p, const bool reprobeIfBusy)
1336{
1337 if (peerProbeIsBusy(p)) {
1338 p->reprobe = reprobeIfBusy;
1339 return;
1340 }
1341 p->reprobe = false;
1342
1343 const auto ctimeout = p->connectTimeout();
1344 /* for each IP address of this CachePeer. find one that we can connect to and probe it. */
1345 for (int i = 0; i < p->n_addresses; ++i) {
1347 conn->remote = p->addresses[i];
1348 conn->remote.port(p->http_port);
1349 conn->setPeer(p);
1350 getOutgoingAddress(nullptr, conn);
1351
1352 ++ p->testing_now;
1353
1354 AsyncCall::Pointer call = commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone, p));
1355 Comm::ConnOpener *cs = new Comm::ConnOpener(conn, call, ctimeout);
1356 cs->setHost(p->host);
1357 AsyncJob::Start(cs);
1358 }
1359
1361}
1362
1363static void
1365{
1366 CachePeer *p = (CachePeer*)data;
1367
1368 if (status == Comm::OK) {
1370 } else {
1372 }
1373
1374 -- p->testing_now;
1375 conn->close();
1376 // TODO: log this traffic.
1377
1378 if (p->reprobe)
1380}
1381
1382static void
1384{
1386 return;
1387
1388 eventAdd("peerCountMcastPeersStart",
1390 p,
1391 (double) when, 1);
1392
1394}
1395
1396static void
1398{
1399 const auto peer = static_cast<CachePeer*>(data);
1400 CallContextCreator([peer] {
1402 });
1404}
1405
1407static void
1409{
1410 // XXX: Do not create lots of complex fake objects (while abusing their
1411 // APIs) to pass around a few basic data points like start_ping and ping!
1412 MemObject *mem;
1413 int reqnum;
1414 // TODO: use class AnyP::Uri instead of constructing and re-parsing a string
1415 LOCAL_ARRAY(char, url, MAX_URL);
1416 assert(p->type == PEER_MULTICAST);
1417 p->mcast.flags.count_event_pending = false;
1418 snprintf(url, MAX_URL, "http://");
1419 p->in_addr.toUrl(url+7, MAX_URL -8 );
1420 strcat(url, "/");
1421 const auto mx = MasterXaction::MakePortless<XactionInitiator::initPeerMcast>();
1422 auto *req = HttpRequest::FromUrlXXX(url, mx);
1423 assert(req != nullptr);
1425 ale->request = req;
1426 CodeContext::Reset(ale);
1428 const auto psstate = new PeerSelector(nullptr);
1429 psstate->request = req;
1430 HTTPMSGLOCK(psstate->request);
1431 psstate->entry = fake;
1432 psstate->peerCountMcastPeerXXX = cbdataReference(p);
1433 psstate->ping.start = current_time;
1434 psstate->al = ale;
1435 mem = fake->mem_obj;
1436 mem->request = psstate->request;
1437 mem->start_ping = current_time;
1439 mem->ircb_data = psstate;
1441 p->mcast.id = mem->id;
1442 reqnum = icpSetCacheKey((const cache_key *)fake->key);
1443 icpCreateAndSend(ICP_QUERY, 0, url, reqnum, 0,
1444 icpOutgoingConn->fd, p->in_addr, psstate->al);
1445 fake->ping_status = PING_WAITING; // TODO: refactor to use PeerSelector::startPingWaiting()
1446 eventAdd("peerCountMcastPeersDone",
1448 psstate,
1449 Config.Timeout.mcast_icp_query / 1000.0, 1);
1450 p->mcast.flags.counting = true;
1451}
1452
1453static void
1455{
1456 const auto psstate = static_cast<PeerSelector*>(data);
1457 CallBack(psstate->al, [psstate] {
1458 peerCountMcastPeersAbort(psstate);
1459 delete psstate;
1460 });
1461}
1462
1465static void
1467{
1468 StoreEntry *fake = psstate->entry;
1469
1471 CachePeer *p = (CachePeer *)psstate->peerCountMcastPeerXXX;
1472 p->mcast.flags.counting = false;
1474 debugs(15, DBG_IMPORTANT, "Group " << p->host << ": " << psstate->ping.n_recv <<
1475 " replies, "<< std::setw(4)<< std::setprecision(2) <<
1476 p->mcast.avg_n_members <<" average, RTT " << p->stats.rtt);
1478 }
1479
1481
1482 fake->abort(); // sets ENTRY_ABORTED and initiates related cleanup
1483 fake->mem_obj->request = nullptr;
1484 fake->unlock("peerCountMcastPeersDone");
1485}
1486
1487static void
1489{
1490 const auto psstate = static_cast<PeerSelector*>(data);
1491 StoreEntry *fake = psstate->entry;
1492 assert(fake);
1493 MemObject *mem = fake->mem_obj;
1494 assert(mem);
1495 int rtt = tvSubMsec(mem->start_ping, current_time);
1496 assert(proto == AnyP::PROTO_ICP);
1497 ++ psstate->ping.n_recv;
1498 int rtt_av_factor = RTT_AV_FACTOR;
1499
1501 rtt_av_factor = RTT_BACKGROUND_AV_FACTOR;
1502
1503 p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, rtt_av_factor);
1504}
1505
1506static void
1508{
1509 dump_peers(sentry, Config.peers);
1510}
1511
1512static void
1514{
1515 dump_peers(sentry, non_peers);
1516}
1517
1518void
1520{
1521 if (p->options.proxy_only)
1522 storeAppendPrintf(sentry, " proxy-only");
1523
1524 if (p->options.no_query)
1525 storeAppendPrintf(sentry, " no-query");
1526
1527 if (p->options.background_ping)
1528 storeAppendPrintf(sentry, " background-ping");
1529
1530 if (p->options.no_digest)
1531 storeAppendPrintf(sentry, " no-digest");
1532
1533 if (p->options.default_parent)
1534 storeAppendPrintf(sentry, " default");
1535
1536 if (p->options.roundrobin)
1537 storeAppendPrintf(sentry, " round-robin");
1538
1539 if (p->options.carp)
1540 storeAppendPrintf(sentry, " carp");
1541
1542#if USE_AUTH
1543 if (p->options.userhash)
1544 storeAppendPrintf(sentry, " userhash");
1545#endif
1546
1547 if (p->options.sourcehash)
1548 storeAppendPrintf(sentry, " sourcehash");
1549
1551 storeAppendPrintf(sentry, " weighted-round-robin");
1552
1553 if (p->options.mcast_responder)
1554 storeAppendPrintf(sentry, " multicast-responder");
1555
1556#if PEER_MULTICAST_SIBLINGS
1557 if (p->options.mcast_siblings)
1558 storeAppendPrintf(sentry, " multicast-siblings");
1559#endif
1560
1561 if (p->weight != 1)
1562 storeAppendPrintf(sentry, " weight=%d", p->weight);
1563
1564 if (p->options.closest_only)
1565 storeAppendPrintf(sentry, " closest-only");
1566
1567#if USE_HTCP
1568 if (p->options.htcp) {
1569 storeAppendPrintf(sentry, " htcp");
1571 bool doneopts = false;
1572 if (p->options.htcp_oldsquid) {
1573 storeAppendPrintf(sentry, "oldsquid");
1574 doneopts = true;
1575 }
1576 if (p->options.htcp_no_clr) {
1577 storeAppendPrintf(sentry, "%sno-clr",(doneopts?",":"="));
1578 doneopts = true;
1579 }
1580 if (p->options.htcp_no_purge_clr) {
1581 storeAppendPrintf(sentry, "%sno-purge-clr",(doneopts?",":"="));
1582 doneopts = true;
1583 }
1584 if (p->options.htcp_only_clr) {
1585 storeAppendPrintf(sentry, "%sonly-clr",(doneopts?",":"="));
1586 //doneopts = true; // uncomment if more opts are added
1587 }
1588 }
1589 }
1590#endif
1591
1593 storeAppendPrintf(sentry, " no-netdb-exchange");
1594
1595#if USE_DELAY_POOLS
1596 if (p->options.no_delay)
1597 storeAppendPrintf(sentry, " no-delay");
1598#endif
1599
1600 if (p->login)
1601 storeAppendPrintf(sentry, " login=%s", p->login);
1602
1603 if (p->mcast.ttl > 0)
1604 storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl);
1605
1606 if (p->connect_timeout_raw > 0)
1607 storeAppendPrintf(sentry, " connect-timeout=%d", (int)p->connect_timeout_raw);
1608
1610 storeAppendPrintf(sentry, " connect-fail-limit=%d", p->connect_fail_limit);
1611
1612#if USE_CACHE_DIGESTS
1613
1614 if (p->digest_url)
1615 storeAppendPrintf(sentry, " digest-url=%s", p->digest_url);
1616
1617#endif
1618
1619 if (p->options.allow_miss)
1620 storeAppendPrintf(sentry, " allow-miss");
1621
1622 if (p->options.no_tproxy)
1623 storeAppendPrintf(sentry, " no-tproxy");
1624
1625 if (p->max_conn > 0)
1626 storeAppendPrintf(sentry, " max-conn=%d", p->max_conn);
1627 if (p->standby.limit > 0)
1628 storeAppendPrintf(sentry, " standby=%d", p->standby.limit);
1629
1630 if (p->options.originserver)
1631 storeAppendPrintf(sentry, " originserver");
1632
1633 if (p->domain)
1634 storeAppendPrintf(sentry, " forceddomain=%s", p->domain);
1635
1636 if (p->connection_auth == 0)
1637 storeAppendPrintf(sentry, " connection-auth=off");
1638 else if (p->connection_auth == 1)
1639 storeAppendPrintf(sentry, " connection-auth=on");
1640 else if (p->connection_auth == 2)
1641 storeAppendPrintf(sentry, " connection-auth=auto");
1642
1643 p->secure.dumpCfg(sentry,"tls-");
1644 storeAppendPrintf(sentry, "\n");
1645}
1646
1647static void
1649{
1650 char ntoabuf[MAX_IPSTRLEN];
1651 int i;
1652
1653 if (peers == nullptr)
1654 storeAppendPrintf(sentry, "There are no neighbors installed.\n");
1655
1656 for (CachePeer *e = peers; e; e = e->next) {
1657 assert(e->host != nullptr);
1658 storeAppendPrintf(sentry, "\n%-11.11s: %s\n",
1659 neighborTypeStr(e),
1660 e->name);
1661 storeAppendPrintf(sentry, "Host : %s/%d/%d\n",
1662 e->host,
1663 e->http_port,
1664 e->icp.port);
1665 storeAppendPrintf(sentry, "Flags :");
1666 dump_peer_options(sentry, e);
1667
1668 for (i = 0; i < e->n_addresses; ++i) {
1669 storeAppendPrintf(sentry, "Address[%d] : %s\n", i,
1670 e->addresses[i].toStr(ntoabuf,MAX_IPSTRLEN) );
1671 }
1672
1673 storeAppendPrintf(sentry, "Status : %s\n",
1674 neighborUp(e) ? "Up" : "Down");
1675 storeAppendPrintf(sentry, "FETCHES : %d\n", e->stats.fetches);
1676 storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open);
1677 storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt);
1678
1679 if (!e->options.no_query) {
1680 storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n",
1681 (int) (squid_curtime - e->stats.last_query));
1682
1683 if (e->stats.last_reply > 0)
1684 storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n",
1685 (int) (squid_curtime - e->stats.last_reply));
1686 else
1687 storeAppendPrintf(sentry, "LAST REPLY : none received\n");
1688
1689 storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent);
1690
1691 storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n",
1692 e->stats.pings_acked,
1693 Math::intPercent(e->stats.pings_acked, e->stats.pings_sent));
1694 }
1695
1696 storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", e->stats.ignored_replies, Math::intPercent(e->stats.ignored_replies, e->stats.pings_acked));
1697
1698 if (!e->options.no_query) {
1699 storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n");
1700#if USE_HTCP
1701
1702 if (e->options.htcp) {
1703 storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n",
1704 e->htcp.counts[0],
1705 Math::intPercent(e->htcp.counts[0], e->stats.pings_acked));
1706 storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n",
1707 e->htcp.counts[1],
1708 Math::intPercent(e->htcp.counts[1], e->stats.pings_acked));
1709 } else {
1710#endif
1711
1712 for (auto op : WholeEnum<icp_opcode>()) {
1713 if (e->icp.counts[op] == 0)
1714 continue;
1715
1716 storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n",
1717 icp_opcode_str[op],
1718 e->icp.counts[op],
1719 Math::intPercent(e->icp.counts[op], e->stats.pings_acked));
1720 }
1721
1722#if USE_HTCP
1723
1724 }
1725
1726#endif
1727
1728 }
1729
1730 if (e->stats.last_connect_failure) {
1731 storeAppendPrintf(sentry, "Last failed connect() at: %s\n",
1732 Time::FormatHttpd(e->stats.last_connect_failure));
1733 }
1734
1735 storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", Math::intPercent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent));
1736 }
1737}
1738
1739#if USE_HTCP
1740void
1742{
1744 MemObject *mem = nullptr;
1745 CachePeer *p;
1746 peer_t ntype = PEER_NONE;
1747 debugs(15, 6, "neighborsHtcpReply: " <<
1748 (htcp->hit ? "HIT" : "MISS") << " " <<
1749 storeKeyText(key) );
1750
1751 if (nullptr != e)
1752 mem = e->mem_obj;
1753
1754 if ((p = whichPeer(from)))
1755 neighborAliveHtcp(p, mem, htcp);
1756
1757 /* Does the entry exist? */
1758 if (nullptr == e) {
1759 debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key) << "' not found");
1761 return;
1762 }
1763
1764 /* check if someone is already fetching it */
1765 if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) {
1766 debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched.");
1768 return;
1769 }
1770
1771 if (mem == nullptr) {
1772 debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key));
1774 return;
1775 }
1776
1777 if (e->ping_status != PING_WAITING) {
1778 debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key) << " is not PING_WAITING");
1780 return;
1781 }
1782
1783 if (!e->locked()) {
1784 // TODO: many entries are unlocked; why is this reported at level 1?
1785 debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks");
1787 return;
1788 }
1789
1790 if (!mem->ircb_data) {
1791 debugs(12, DBG_IMPORTANT, "ERROR: Squid BUG: missing HTCP callback data for " << *e);
1793 return;
1794 }
1795
1796 if (p) {
1797 ntype = neighborType(p, mem->request->url);
1798 neighborUpdateRtt(p, mem);
1799 }
1800
1801 if (ignoreMulticastReply(p, mem->ircb_data)) {
1803 return;
1804 }
1805
1806 debugs(15, 3, "neighborsHtcpReply: e = " << e);
1807 // TODO: Refactor (ping_reply_callback,ircb_data) to add CodeContext.
1808 mem->ping_reply_callback(p, ntype, AnyP::PROTO_HTCP, htcp, mem->ircb_data);
1809}
1810
1811/*
1812 * Send HTCP CLR messages to all peers configured to receive them.
1813 */
1814void
1816{
1817 CachePeer *p;
1818 char buf[128];
1819
1820 for (p = Config.peers; p; p = p->next) {
1821 if (!p->options.htcp) {
1822 continue;
1823 }
1824 if (p->options.htcp_no_clr) {
1825 continue;
1826 }
1827 if (p->options.htcp_no_purge_clr && reason == HTCP_CLR_PURGE) {
1828 continue;
1829 }
1830 debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p->in_addr.toUrl(buf, 128));
1831 htcpClear(e, req, method, p, reason);
1832 }
1833}
1834
1835#endif
1836
void CallContextCreator(Fun &&creator)
Definition: CodeContext.h:144
void CallBack(const CodeContext::Pointer &callbackContext, Fun &&callback)
Definition: CodeContext.h:112
CommCbFunPtrCallT< Dialer > * commCbCall(int debugSection, int debugLevel, const char *callName, const Dialer &dialer)
Definition: CommCalls.h:342
void CNCB(const Comm::ConnectionPointer &conn, Comm::Flag status, int xerrno, void *data)
Definition: CommCalls.h:35
void getOutgoingAddress(HttpRequest *request, const Comm::ConnectionPointer &conn)
Definition: FwdState.cc:1519
time_t squid_curtime
Definition: stub_libtime.cc:20
AnyP::PortCfgPointer HttpPortList
list of Squid http(s)_port configured
Definition: PortCfg.cc:22
class SquidConfig Config
Definition: SquidConfig.cc:12
int conn
the current server connection FD
Definition: Transport.cc:26
int matchDomainName(const char *h, const char *d, MatchDomainNameFlags flags)
Definition: Uri.cc:736
#define assert(EX)
Definition: assert.h:19
int cbdataReferenceValid(const void *p)
Definition: cbdata.cc:398
#define cbdataReferenceDone(var)
Definition: cbdata.h:350
#define cbdataReference(var)
Definition: cbdata.h:341
Acl::Answer const & fastCheck()
Definition: Checklist.cc:332
virtual void syncAle(HttpRequest *adaptedRequest, const char *logUri) const
assigns uninitialized adapted_request and url ALE components
AccessLogEntry::Pointer al
info for the future access.log, and external ACL
HttpReplyPointer reply
HttpRequest * request
bool allowed() const
Definition: Acl.h:150
Definition: Uri.h:31
void host(const char *src)
Definition: Uri.cc:99
static void Start(const Pointer &job)
Definition: AsyncJob.cc:24
bool contains(const cache_key *key) const
Definition: CacheDigest.cc:93
CbcPointer< PeerPoolMgr > mgr
pool manager
Definition: CachePeer.h:182
acl_access * access
Definition: CachePeer.h:79
bool closest_only
Definition: CachePeer.h:90
int weight
Definition: CachePeer.h:125
struct CachePeer::@32 htcp
bool no_tproxy
Definition: CachePeer.h:118
bool htcp_oldsquid
Definition: CachePeer.h:93
bool no_query
Definition: CachePeer.h:83
struct CachePeer::@33 options
NeighborTypeDomainList * typelist
Definition: CachePeer.h:78
int basetime
Definition: CachePeer.h:126
bool originserver
Definition: CachePeer.h:117
time_t probe_start
Definition: CachePeer.h:53
bool background_ping
Definition: CachePeer.h:84
peer_t type
Definition: CachePeer.h:41
bool roundrobin
Definition: CachePeer.h:87
int n_addresses
Definition: CachePeer.h:151
int connection_auth
0 - off, 1 - on, 2 - auto
Definition: CachePeer.h:195
unsigned short http_port
Definition: CachePeer.h:77
bool proxy_only
Definition: CachePeer.h:82
int pings_sent
Definition: CachePeer.h:46
int logged_state
so we can print dead/revived msgs
Definition: CachePeer.h:58
char * login
Definition: CachePeer.h:174
time_t last_connect_probe
Definition: CachePeer.h:57
bool htcp_no_purge_clr
Definition: CachePeer.h:95
char * host
Definition: CachePeer.h:40
Security::PeerOptions secure
security settings for peer connection
Definition: CachePeer.h:190
time_t connect_timeout_raw
connect_timeout; use connectTimeout() instead!
Definition: CachePeer.h:175
bool mcast_siblings
Definition: CachePeer.h:120
char * domain
Forced domain.
Definition: CachePeer.h:187
int limit
the limit itself
Definition: CachePeer.h:183
time_t last_connect_failure
Definition: CachePeer.h:56
time_t last_query
Definition: CachePeer.h:54
CachePeer * next
Definition: CachePeer.h:153
PeerDigest * digest
Definition: CachePeer.h:142
int n_replies_expected
Definition: CachePeer.h:131
int tcp_up
Definition: CachePeer.h:146
bool counting
Definition: CachePeer.h:137
int rtt
Definition: CachePeer.h:49
bool no_digest
Definition: CachePeer.h:85
Ip::Address in_addr
Definition: CachePeer.h:43
struct CachePeer::@31 stats
PconnPool * pool
idle connection pool for this peer
Definition: CachePeer.h:181
int rr_count
Definition: CachePeer.h:152
bool waitingForClose
a conn must close before we open a standby conn
Definition: CachePeer.h:184
bool sourcehash
Definition: CachePeer.h:116
int connect_fail_limit
Definition: CachePeer.h:176
double avg_n_members
Definition: CachePeer.h:129
int n_times_counted
Definition: CachePeer.h:130
struct CachePeer::icp_ icp
time_t last_reply
Definition: CachePeer.h:55
int pings_acked
Definition: CachePeer.h:47
bool no_netdb_exchange
Definition: CachePeer.h:99
int max_conn
Definition: CachePeer.h:177
bool htcp_only_clr
Definition: CachePeer.h:96
time_t connectTimeout() const
Definition: CachePeer.cc:51
int counts[2]
Definition: CachePeer.h:72
bool count_event_pending
Definition: CachePeer.h:136
char * name
Definition: CachePeer.h:39
Ip::Address addresses[10]
Definition: CachePeer.h:150
bool userhash
Definition: CachePeer.h:114
int conn_open
current opened connections
Definition: CachePeer.h:59
int testing_now
Definition: CachePeer.h:154
bool default_parent
Definition: CachePeer.h:86
bool carp
Definition: CachePeer.h:104
struct CachePeer::@34::@40 flags
bool reprobe
whether to do another TCP probe after current TCP probes
Definition: CachePeer.h:148
bool allow_miss
Definition: CachePeer.h:103
char * digest_url
Definition: CachePeer.h:143
struct CachePeer::@38 standby
optional "cache_peer standby=limit" feature
int ignored_replies
Definition: CachePeer.h:50
double version
Definition: CachePeer.h:71
bool mcast_responder
Definition: CachePeer.h:89
bool weighted_roundrobin
Definition: CachePeer.h:88
struct CachePeer::@34 mcast
bool htcp_no_clr
Definition: CachePeer.h:94
bool no_delay
Definition: CachePeer.h:101
Cbc * valid() const
was set and is valid
Definition: CbcPointer.h:41
static void Reset()
forgets the current context, setting it to nil/unknown
Definition: CodeContext.cc:75
void setHost(const char *)
set the hostname note for this connection
Definition: ConnOpener.cc:100
static std::ostream & Extra(std::ostream &os)
prefixes each grouped debugs() line after the first one in the group
Definition: Stream.h:117
size_t size() const noexcept
all cached IPs
Definition: ipcache.h:62
IpsSelector< IpsIterator > goodAndBad() const
all IPs
Definition: ipcache.h:248
bool empty() const noexcept
whether we cached no IPs at all
Definition: ipcache.h:61
encapsulates DNS lookup results
Definition: LookupDetails.h:21
double version
Definition: htcp.h:32
int hit
Definition: htcp.h:29
static HttpRequest * FromUrlXXX(const char *url, const MasterXaction::Pointer &, const HttpRequestMethod &method=Http::METHOD_GET)
Definition: HttpRequest.cc:528
AnyP::Uri url
the request URI
Definition: HttpRequest.h:115
char * toStr(char *buf, const unsigned int blen, int force=AF_UNSPEC) const
Definition: Address.cc:792
void setEmpty()
Fast reset of the stored content to what would be after default constructor.
Definition: Address.cc:184
char * toUrl(char *buf, unsigned int len) const
Definition: Address.cc:874
unsigned short port() const
Definition: Address.cc:778
IRCB * ping_reply_callback
Definition: MemObject.h:191
HttpRequestPointer request
Definition: MemObject.h:188
struct timeval start_ping
Definition: MemObject.h:190
PeerSelector * ircb_data
Definition: MemObject.h:192
representation of a neighbor_type_domain configuration directive. A POD
NeighborTypeDomainList * next
void count(int uses)
bool requested
Definition: PeerDigest.h:90
bool usable
Definition: PeerDigest.h:89
bool needed
Definition: PeerDigest.h:88
CacheDigest * cd
Definition: PeerDigest.h:83
struct PeerDigest::@89 flags
static void Checkpoint(const Pointer &mgr, const char *reason)
Definition: PeerPoolMgr.cc:241
HttpRequest * request
AccessLogEntry::Pointer al
info for the future access.log entry
void * peerCountMcastPeerXXX
a hack to help peerCountMcastPeersStart()
ping_data ping
StoreEntry * entry
C * getRaw() const
Definition: RefCount.h:80
virtual void dumpCfg(Packable *, const char *pfx) const
output squid.conf syntax with 'pfx' prefix on parameters for the stored settings
Definition: PeerOptions.cc:105
time_t deadPeer
Definition: SquidConfig.h:122
struct SquidConfig::@111 onoff
int mcast_icp_query
Definition: SquidConfig.h:127
int icp_query_max
Definition: SquidConfig.h:125
int icp_query_min
Definition: SquidConfig.h:126
CachePeer * peers
Definition: SquidConfig.h:245
unsigned short icp
Definition: SquidConfig.h:139
struct SquidConfig::@99 Port
time_t backgroundPingRate
Definition: SquidConfig.h:106
unsigned short htcp
Definition: SquidConfig.h:142
struct SquidConfig::@98 Timeout
uint16_t flags
Definition: Store.h:232
int locked() const
Definition: Store.h:146
int unlock(const char *context)
Definition: store.cc:442
const char * url() const
Definition: store.cc:1533
bool hasDisk(const sdirno dirn=-1, const sfileno filen=-1) const
Definition: store.cc:1896
const char * getMD5Text() const
Definition: store.cc:204
MemObject * mem_obj
Definition: Store.h:221
ping_status_t ping_status
Definition: Store.h:242
void abort()
Definition: store.cc:1050
StoreEntry * findCallbackXXX(const cache_key *)
Definition: Controller.cc:400
unsigned char version
Definition: ICP.h:40
unsigned char opcode
Definition: ICP.h:38
int n_recv
Definition: PingData.h:39
A const & max(A const &lhs, A const &rhs)
#define Important(id)
Definition: Messages.h:91
#define DBG_IMPORTANT
Definition: Stream.h:41
#define debugs(SECTION, LEVEL, CONTENT)
Definition: Stream.h:196
#define DBG_CRITICAL
Definition: Stream.h:40
#define RTT_BACKGROUND_AV_FACTOR
Definition: defines.h:83
#define PEER_TCP_MAGIC_COUNT
Definition: defines.h:124
#define PEER_MAX_ADDRESSES
Definition: defines.h:81
#define ICP_FLAG_SRC_RTT
Definition: defines.h:41
#define PEER_ALIVE
Definition: defines.h:86
#define PEER_DEAD
Definition: defines.h:85
#define ICP_VERSION_2
Definition: defines.h:44
#define EBIT_TEST(flag, bit)
Definition: defines.h:69
#define RTT_AV_FACTOR
Definition: defines.h:82
#define MAX_URL
Definition: defines.h:78
static int port
Definition: ldap_backend.cc:70
@ PING_WAITING
Sent ICP queries to peers and still awaiting responses.
Definition: enums.h:43
htcp_clr_reason
Definition: enums.h:241
@ HTCP_CLR_PURGE
Definition: enums.h:242
peer_t
Definition: enums.h:27
@ PEER_SIBLING
Definition: enums.h:29
@ PEER_PARENT
Definition: enums.h:30
@ PEER_NONE
Definition: enums.h:28
@ PEER_MULTICAST
Definition: enums.h:31
@ ENTRY_DISPATCHED
Definition: enums.h:101
void eventAddIsh(const char *name, EVH *func, void *arg, double delta_ish, int weight)
Definition: event.cc:114
int eventFind(EVH *func, void *arg)
Definition: event.cc:145
void eventDelete(EVH *func, void *arg)
Definition: event.cc:127
void eventAdd(const char *name, EVH *func, void *arg, double when, int weight, bool cbdata)
Definition: event.cc:107
int Squid_MaxFD
void ipcache_nbgethostbyname(const char *name, IPH *handler, void *handlerData)
Definition: ipcache.cc:599
int icpSetCacheKey(const cache_key *key)
Definition: icp_v2.cc:861
void icpCreateAndSend(icp_opcode, int flags, char const *url, int reqnum, int pad, int fd, const Ip::Address &from, AccessLogEntryPointer)
Definition: icp_v2.cc:417
icp_opcode
Definition: icp_opcode.h:13
@ ICP_DECHO
Definition: icp_opcode.h:26
@ ICP_QUERY
Definition: icp_opcode.h:16
@ ICP_MISS_NOFETCH
Definition: icp_opcode.h:36
@ ICP_END
Definition: icp_opcode.h:39
@ ICP_DENIED
Definition: icp_opcode.h:37
@ ICP_SECHO
Definition: icp_opcode.h:25
@ ICP_MISS
Definition: icp_opcode.h:18
@ ICP_HIT
Definition: icp_opcode.h:17
Comm::ConnectionPointer icpOutgoingConn
Definition: icp_v2.cc:100
Comm::ConnectionPointer icpIncomingConn
Definition: icp_v2.cc:98
int htcpQuery(StoreEntry *e, HttpRequest *req, CachePeer *p)
Definition: htcp.cc:1516
void htcpClear(StoreEntry *e, HttpRequest *req, const HttpRequestMethod &, CachePeer *p, htcp_clr_reason reason)
Definition: htcp.cc:1565
void HTTPMSGLOCK(Http::Message *a)
Definition: Message.h:160
const char * icp_opcode_str[]
int isPowTen(int count)
Definition: int.cc:17
#define MAX_IPSTRLEN
Length of buffer that needs to be allocated to old a null-terminated IP-string.
Definition: forward.h:25
void IPH(const ipcache_addrs *, const Dns::LookupDetails &details, void *)
Definition: ipcache.h:219
const char * lookup_t_str[]
lookup_t
Definition: lookup_t.h:12
@ LOOKUP_MISS
Definition: lookup_t.h:15
@ LOOKUP_HIT
Definition: lookup_t.h:14
@ LOOKUP_NONE
Definition: lookup_t.h:13
void OBJH(StoreEntry *)
Definition: forward.h:44
int mcastSetTtl(int fd, int mcast_ttl)
Definition: multicast.cc:20
ProtocolType
Definition: ProtocolType.h:23
@ PROTO_HTCP
Definition: ProtocolType.h:34
@ PROTO_ICP
Definition: ProtocolType.h:32
bool IsConnOpen(const Comm::ConnectionPointer &conn)
Definition: Connection.cc:27
Flag
Definition: Flag.h:15
@ OK
Definition: Flag.h:16
@ METHOD_CONNECT
Definition: MethodType.h:29
@ METHOD_GET
Definition: MethodType.h:25
int intPercent(const int a, const int b)
Definition: SquidMath.cc:13
double doubleAverage(const double, const double, int, const int)
Definition: SquidMath.cc:31
int intAverage(const int, const int, int, const int)
Definition: SquidMath.cc:40
void RegisterAction(char const *action, char const *desc, OBJH *handler, int pw_req_flag, int atomic)
Definition: Registration.cc:16
SSL Connection
Definition: Session.h:45
Controller & Root()
safely access controller singleton
Definition: Controller.cc:926
const char * FormatHttpd(time_t)
Definition: gadgets.cc:116
static OBJH neighborDumpNonPeers
Definition: neighbors.cc:72
void peerConnectSucceded(CachePeer *p)
Definition: neighbors.cc:1305
static void peerClearRRLoop(void *data)
Definition: neighbors.cc:418
static void peerCountMcastPeersDone(void *data)
Definition: neighbors.cc:1454
void peerNoteDigestLookup(HttpRequest *request, CachePeer *p, lookup_t lookup)
Definition: neighbors.cc:872
static int peerWouldBePinged(const CachePeer *, PeerSelector *)
Definition: neighbors.cc:183
static void neighborAliveHtcp(CachePeer *, const MemObject *, const HtcpReplyData *)
Definition: neighbors.cc:927
static void peerCountMcastPeersSchedule(CachePeer *p, time_t when)
Definition: neighbors.cc:1383
void neighborsHtcpClear(StoreEntry *e, HttpRequest *req, const HttpRequestMethod &method, htcp_clr_reason reason)
Definition: neighbors.cc:1815
CachePeer * peerFindByName(const char *name)
Definition: neighbors.cc:1132
CachePeer * getFirstUpParent(PeerSelector *ps)
Definition: neighbors.cc:288
static IPH peerDNSConfigure
Definition: neighbors.cc:60
CachePeer * whichPeer(const Ip::Address &from)
Definition: neighbors.cc:96
static CachePeer * first_ping
Definition: neighbors.cc:78
static void peerCountMcastPeersCreateAndSend(CachePeer *p)
initiates an ICP transaction to a multicast peer
Definition: neighbors.cc:1408
void neighborsHtcpReply(const cache_key *key, HtcpReplyData *htcp, const Ip::Address &from)
Definition: neighbors.cc:1741
static void neighborUpdateRtt(CachePeer *p, MemObject *mem)
Definition: neighbors.cc:902
static CNCB peerProbeConnectDone
Definition: neighbors.cc:62
void peerClearRR()
Definition: neighbors.cc:447
void neighbors_init(void)
Definition: neighbors.cc:554
static OBJH neighborDumpPeers
Definition: neighbors.cc:71
static void peerConnectFailedSilent(CachePeer *p)
Definition: neighbors.cc:1279
bool peerHasConnAvailable(const CachePeer *p)
Whether the peer has idle or standby connections that can be used now.
Definition: neighbors.cc:232
int neighborsCount(PeerSelector *ps)
Definition: neighbors.cc:273
static void peerAlive(CachePeer *p)
Definition: neighbors.cc:459
static void peerCountMcastPeersAbort(PeerSelector *)
Definition: neighbors.cc:1466
void dump_peer_options(StoreEntry *sentry, CachePeer *p)
Definition: neighbors.cc:1519
int neighborUp(const CachePeer *p)
Definition: neighbors.cc:1163
static bool peerProbeIsBusy(const CachePeer *p)
whether new TCP probes are currently banned
Definition: neighbors.cc:1319
int peerHTTPOkay(const CachePeer *p, PeerSelector *ps)
Definition: neighbors.cc:258
CachePeer * getDefaultParent(PeerSelector *ps)
Definition: neighbors.cc:474
CachePeer * getRoundRobinParent(PeerSelector *ps)
Definition: neighbors.cc:313
const char * neighborTypeStr(const CachePeer *p)
Definition: neighbors.cc:81
time_t positiveTimeout(const time_t timeout)
Definition: neighbors.cc:1195
bool peerAllowedToUse(const CachePeer *, PeerSelector *)
Definition: neighbors.cc:138
static void neighborsRegisterWithCacheManager()
Definition: neighbors.cc:540
void peerClearRRStart(void)
Definition: neighbors.cc:430
bool peerCanOpenMore(const CachePeer *p)
Whether we can open new connections to the peer (e.g., despite max-conn)
Definition: neighbors.cc:223
static int NLateReplies
Definition: neighbors.cc:77
void peerConnectFailed(CachePeer *p)
Definition: neighbors.cc:1298
peer_t neighborType(const CachePeer *p, const AnyP::Uri &url)
Definition: neighbors.cc:115
static void dump_peers(StoreEntry *sentry, CachePeer *peers)
Definition: neighbors.cc:1648
int neighborsUdpPing(HttpRequest *request, StoreEntry *entry, IRCB *callback, PeerSelector *ps, int *exprep, int *timeout)
Definition: neighbors.cc:595
CachePeer * neighborsDigestSelect(PeerSelector *ps)
Definition: neighbors.cc:805
static CachePeer * non_peers
Definition: neighbors.cc:948
static IRCB peerCountHandleIcpReply
Definition: neighbors.cc:68
static unsigned short echo_port
Definition: neighbors.cc:75
static void peerRefreshDNS(void *)
Definition: neighbors.cc:1258
static void neighborAlive(CachePeer *, const MemObject *, const icp_common_t *)
Definition: neighbors.cc:890
CachePeer * getNextPeer(CachePeer *p)
Definition: neighbors.cc:501
lookup_t peerDigestLookup(CachePeer *p, PeerSelector *ps)
Definition: neighbors.cc:759
#define MCAST_COUNT_RATE
Definition: neighbors.cc:49
CachePeer * getFirstPeer(void)
Definition: neighbors.cc:507
static void neighborCountIgnored(CachePeer *)
Definition: neighbors.cc:938
void peerConnClosed(CachePeer *p)
Notifies peer of an associated connection closure.
Definition: neighbors.cc:247
CachePeer * peerFindByNameAndPort(const char *name, unsigned short port)
Definition: neighbors.cc:1145
static void neighborIgnoreNonPeer(const Ip::Address &, icp_opcode)
Definition: neighbors.cc:951
static int ignoreMulticastReply(CachePeer *p, PeerSelector *ps)
Definition: neighbors.cc:989
void neighborsUdpAck(const cache_key *key, icp_common_t *header, const Ip::Address &from)
Definition: neighbors.cc:1011
static void neighborRemove(CachePeer *)
Definition: neighbors.cc:513
static void peerProbeConnect(CachePeer *, const bool reprobeIfBusy=false)
Definition: neighbors.cc:1335
CachePeer * getWeightedRoundRobinParent(PeerSelector *ps)
Definition: neighbors.cc:355
static void peerCountMcastPeersStart(void *data)
Definition: neighbors.cc:1397
int netdbHostRtt(const char *host)
Definition: net_db.cc:1023
void netdbExchangeStart(void *data)
Definition: net_db.cc:1260
struct servent * getservbyname()
void peerDigestNeeded(PeerDigest *pd)
Definition: peer_digest.cc:176
#define LOCAL_ARRAY(type, name, size)
Definition: squid.h:68
int stat5minClientRequests(void)
Definition: stat.cc:1687
unsigned char cache_key
Store key.
Definition: forward.h:29
void storeAppendPrintf(StoreEntry *e, const char *fmt,...)
Definition: store.cc:828
StoreEntry * storeCreateEntry(const char *url, const char *logUrl, const RequestFlags &flags, const HttpRequestMethod &method)
Definition: store.cc:732
const cache_key * storeKeyPublicByRequest(HttpRequest *request, const KeyScope keyScope)
const char * storeKeyText(const cache_key *key)
unsigned short port
Definition: CachePeer.h:66
int counts[ICP_END+1]
Definition: CachePeer.h:65
char * url
Definition: tcp-banger2.c:114
char method[16]
Definition: tcp-banger2.c:115
int unsigned int
Definition: stub_fd.cc:19
bool IamWorkerProcess()
whether the current process handles HTTP transactions and such
Definition: stub_tools.cc:47
struct _request * request(char *urlin)
Definition: tcp-banger2.c:291
struct timeval current_time
the current UNIX time in timeval {seconds, microseconds} format
Definition: gadgets.cc:17
int tvSubMsec(struct timeval t1, struct timeval t2)
Definition: gadgets.cc:51
const char * getMyHostname(void)
Definition: tools.cc:464
void debug_trap(const char *message)
Definition: tools.cc:455
void IRCB(CachePeer *, peer_t, AnyP::ProtocolType, void *, void *data)
Definition: typedefs.h:22

 

Introduction

Documentation

Support

Miscellaneous

Web Site Translations

Mirrors