2 * DEBUG: section 15 Neighbor Routines
3 * AUTHOR: Harvest Derived
5 * SQUID Web Proxy Cache http://www.squid-cache.org/
6 * ----------------------------------------------------------
8 * Squid is the result of efforts by numerous individuals from
9 * the Internet community; see the CONTRIBUTORS file for full
10 * details. Many organizations have provided support for Squid's
11 * development; see the SPONSORS file for full details. Squid is
12 * Copyrighted (C) 2001 by the Regents of the University of
13 * California; see the COPYRIGHT file for full details. Squid
14 * incorporates software developed and/or copyrighted by other
15 * sources; see the CREDITS file for full details.
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2 of the License, or
20 * (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
34 #include "acl/FilledChecklist.h"
35 #include "anyp/PortCfg.h"
36 #include "CacheDigest.h"
37 #include "comm/Connection.h"
38 #include "comm/ConnOpener.h"
43 #include "HttpRequest.h"
44 #include "icmp/net_db.h"
47 #include "ip/Address.h"
50 #include "MemObject.h"
51 #include "mgr/Registration.h"
52 #include "multicast.h"
53 #include "neighbors.h"
54 #include "PeerDigest.h"
55 #include "PeerSelectState.h"
56 #include "SquidConfig.h"
57 #include "SquidMath.h"
58 #include "SquidTime.h"
61 #include "store_key_md5.h"
65 /* count mcast group peers every 15 minutes */
66 #define MCAST_COUNT_RATE 900
68 bool peerAllowedToUse(const peer
*, HttpRequest
*);
69 static int peerWouldBePinged(const peer
*, HttpRequest
*);
70 static void neighborRemove(peer
*);
71 static void neighborAlive(peer
*, const MemObject
*, const icp_common_t
*);
73 static void neighborAliveHtcp(peer
*, const MemObject
*, const htcpReplyData
*);
75 static void neighborCountIgnored(peer
*);
76 static void peerRefreshDNS(void *);
77 static IPH peerDNSConfigure
;
78 static bool peerProbeConnect(peer
*);
79 static CNCB peerProbeConnectDone
;
80 static void peerCountMcastPeersDone(void *data
);
81 static void peerCountMcastPeersStart(void *data
);
82 static void peerCountMcastPeersSchedule(peer
* p
, time_t when
);
83 static IRCB peerCountHandleIcpReply
;
85 static void neighborIgnoreNonPeer(const Ip::Address
&, icp_opcode
);
86 static OBJH neighborDumpPeers
;
87 static OBJH neighborDumpNonPeers
;
88 static void dump_peers(StoreEntry
* sentry
, peer
* peers
);
90 static unsigned short echo_port
;
92 static int NLateReplies
= 0;
93 static peer
*first_ping
= NULL
;
96 neighborTypeStr(const peer
* p
)
98 if (p
->type
== PEER_NONE
)
101 if (p
->type
== PEER_SIBLING
)
104 if (p
->type
== PEER_MULTICAST
)
105 return "Multicast Group";
111 whichPeer(const Ip::Address
&from
)
116 debugs(15, 3, "whichPeer: from " << from
);
118 for (p
= Config
.peers
; p
; p
= p
->next
) {
119 for (j
= 0; j
< p
->n_addresses
; ++j
) {
120 if (from
== p
->addresses
[j
] && from
.GetPort() == p
->icp
.port
) {
130 neighborType(const peer
* p
, const HttpRequest
* request
)
133 const domain_type
*d
= NULL
;
135 for (d
= p
->typelist
; d
; d
= d
->next
) {
136 if (0 == matchDomainName(request
->GetHost(), d
->domain
))
137 if (d
->type
!= PEER_NONE
)
140 #if PEER_MULTICAST_SIBLINGS
141 if (p
->type
== PEER_MULTICAST
)
142 if (p
->options
.mcast_siblings
)
150 * \return Whether it is appropriate to fetch REQUEST from PEER.
153 peerAllowedToUse(const peer
* p
, HttpRequest
* request
)
156 const domain_ping
*d
= NULL
;
157 assert(request
!= NULL
);
159 if (neighborType(p
, request
) == PEER_SIBLING
) {
160 #if PEER_MULTICAST_SIBLINGS
161 if (p
->type
== PEER_MULTICAST
&& p
->options
.mcast_siblings
&&
162 (request
->flags
.nocache
|| request
->flags
.refresh
|| request
->flags
.loopdetect
|| request
->flags
.need_validation
))
163 debugs(15, 2, "peerAllowedToUse(" << p
->name
<< ", " << request
->GetHost() << ") : multicast-siblings optimization match");
165 if (request
->flags
.nocache
)
168 if (request
->flags
.refresh
)
171 if (request
->flags
.loopdetect
)
174 if (request
->flags
.need_validation
)
178 // CONNECT requests are proxy requests. Not to be forwarded to origin servers.
179 // Unless the destination port matches, in which case we MAY perform a 'DIRECT' to this peer.
180 if (p
->options
.originserver
&& request
->method
== METHOD_CONNECT
&& request
->port
!= p
->in_addr
.GetPort())
183 if (p
->peer_domain
== NULL
&& p
->access
== NULL
)
186 bool do_ping
= false;
187 for (d
= p
->peer_domain
; d
; d
= d
->next
) {
188 if (0 == matchDomainName(request
->GetHost(), d
->domain
)) {
189 do_ping
= d
->do_ping
;
193 do_ping
= !d
->do_ping
;
196 if (p
->peer_domain
&& !do_ping
)
199 if (p
->access
== NULL
)
202 ACLFilledChecklist
checklist(p
->access
, request
, NULL
);
203 checklist
.src_addr
= request
->client_addr
;
204 checklist
.my_addr
= request
->my_addr
;
208 * this is currently broken because 'request->user_ident' has been
209 * moved to conn->rfc931 and we don't have access to the parent
210 * ConnStateData here.
212 if (request
->user_ident
[0])
213 xstrncpy(checklist
.rfc931
, request
->user_ident
, USER_IDENT_SZ
);
217 return (checklist
.fastCheck() == ACCESS_ALLOWED
);
220 /* Return TRUE if it is okay to send an ICP request to this peer. */
222 peerWouldBePinged(const peer
* p
, HttpRequest
* request
)
224 if (p
->icp
.port
== 0)
227 if (p
->options
.no_query
)
230 if (p
->options
.mcast_responder
)
233 if (p
->n_addresses
== 0)
236 if (p
->options
.background_ping
&& (squid_curtime
- p
->stats
.last_query
< Config
.backgroundPingRate
))
239 /* the case below seems strange, but can happen if the
240 * URL host is on the other side of a firewall */
241 if (p
->type
== PEER_SIBLING
)
242 if (!request
->flags
.hierarchical
)
245 if (!peerAllowedToUse(p
, request
))
248 /* Ping dead peers every timeout interval */
249 if (squid_curtime
- p
->stats
.last_query
> Config
.Timeout
.deadPeer
)
258 /* Return TRUE if it is okay to send an HTTP request to this peer. */
260 peerHTTPOkay(const peer
* p
, HttpRequest
* request
)
263 if (p
->stats
.conn_open
>= p
->max_conn
)
266 if (!peerAllowedToUse(p
, request
))
276 neighborsCount(HttpRequest
* request
)
281 for (p
= Config
.peers
; p
; p
= p
->next
)
282 if (peerWouldBePinged(p
, request
))
285 debugs(15, 3, "neighborsCount: " << count
);
291 getFirstUpParent(HttpRequest
* request
)
295 for (p
= Config
.peers
; p
; p
= p
->next
) {
299 if (neighborType(p
, request
) != PEER_PARENT
)
302 if (!peerHTTPOkay(p
, request
))
308 debugs(15, 3, "getFirstUpParent: returning " << (p
? p
->host
: "NULL"));
313 getRoundRobinParent(HttpRequest
* request
)
318 for (p
= Config
.peers
; p
; p
= p
->next
) {
319 if (!p
->options
.roundrobin
)
322 if (neighborType(p
, request
) != PEER_PARENT
)
325 if (!peerHTTPOkay(p
, request
))
332 if (p
->weight
== q
->weight
) {
333 if (q
->rr_count
< p
->rr_count
)
335 } else if ( ((double) q
->rr_count
/ q
->weight
) < ((double) p
->rr_count
/ p
->weight
)) {
346 debugs(15, 3, HERE
<< "returning " << (q
? q
->host
: "NULL"));
352 getWeightedRoundRobinParent(HttpRequest
* request
)
358 for (p
= Config
.peers
; p
; p
= p
->next
) {
359 if (!p
->options
.weighted_roundrobin
)
362 if (neighborType(p
, request
) != PEER_PARENT
)
365 if (!peerHTTPOkay(p
, request
))
368 if (q
&& q
->rr_count
< p
->rr_count
)
374 if (q
&& q
->rr_count
> 1000000)
375 for (p
= Config
.peers
; p
; p
= p
->next
) {
376 if (!p
->options
.weighted_roundrobin
)
379 if (neighborType(p
, request
) != PEER_PARENT
)
386 weighted_rtt
= (q
->stats
.rtt
- q
->basetime
) / q
->weight
;
388 if (weighted_rtt
< 1)
391 q
->rr_count
+= weighted_rtt
;
393 debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt
);
396 debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q
? q
->host
: "NULL"));
401 * This gets called every 5 minutes to clear the round-robin counter.
402 * The exact timing is an arbitrary default, set on estimate timing of a
403 * large number of requests in a high-performance environment during the
404 * period. The larger the number of requests between cycled resets the
405 * more balanced the operations.
408 \todo Make the reset timing a selectable parameter in squid.conf
411 peerClearRRLoop(void *data
)
414 eventAdd("peerClearRR", peerClearRRLoop
, data
, 5 * 60.0, 0);
418 * This gets called on startup and restart to kick off the peer round-robin
419 * maintenance event. It ensures that no matter how many times its called
420 * no more than one event is scheduled.
423 peerClearRRStart(void)
425 static int event_added
= 0;
427 peerClearRRLoop(NULL
);
432 * Called whenever the round-robin counters need to be reset to a sane state.
433 * So far those times are:
434 * - On startup and reconfigure - to set the counters to sane initial settings.
435 * - When a peer has revived from dead, to prevent the revived peer being
436 * flooded with requests which it has 'missed' during the down period.
442 for (p
= Config
.peers
; p
; p
= p
->next
) {
448 * Perform all actions when a peer is detected revived.
453 if (p
->stats
.logged_state
== PEER_DEAD
&& p
->tcp_up
) {
454 debugs(15, DBG_IMPORTANT
, "Detected REVIVED " << neighborTypeStr(p
) << ": " << p
->name
);
455 p
->stats
.logged_state
= PEER_ALIVE
;
459 p
->stats
.last_reply
= squid_curtime
;
460 p
->stats
.probe_start
= 0;
464 getDefaultParent(HttpRequest
* request
)
468 for (p
= Config
.peers
; p
; p
= p
->next
) {
469 if (neighborType(p
, request
) != PEER_PARENT
)
472 if (!p
->options
.default_parent
)
475 if (!peerHTTPOkay(p
, request
))
478 debugs(15, 3, "getDefaultParent: returning " << p
->host
);
483 debugs(15, 3, "getDefaultParent: returning NULL");
488 getNextPeer(peer
* p
)
500 neighborRemove(peer
* target
)
522 first_ping
= Config
.peers
;
526 neighborsRegisterWithCacheManager()
528 Mgr::RegisterAction("server_list",
529 "Peer Cache Statistics",
530 neighborDumpPeers
, 0, 1);
532 if (Comm::IsConnOpen(icpIncomingConn
)) {
533 Mgr::RegisterAction("non_peers",
534 "List of Unknown sites sending ICP messages",
535 neighborDumpNonPeers
, 0, 1);
542 struct servent
*sep
= NULL
;
543 const char *me
= getMyHostname();
544 peer
*thisPeer
= NULL
;
547 neighborsRegisterWithCacheManager();
549 if (Comm::IsConnOpen(icpIncomingConn
)) {
551 for (thisPeer
= Config
.peers
; thisPeer
; thisPeer
= next
) {
552 next
= thisPeer
->next
;
554 if (0 != strcmp(thisPeer
->host
, me
))
557 for (AnyP::PortCfg
*s
= Config
.Sockaddr
.http
; s
; s
= s
->next
) {
558 if (thisPeer
->http_port
!= s
->s
.GetPort())
561 debugs(15, DBG_IMPORTANT
, "WARNING: Peer looks like this host");
563 debugs(15, DBG_IMPORTANT
, " Ignoring " <<
564 neighborTypeStr(thisPeer
) << " " << thisPeer
->host
<<
565 "/" << thisPeer
->http_port
<< "/" <<
568 neighborRemove(thisPeer
);
573 peerRefreshDNS((void *) 1);
575 sep
= getservbyname("echo", "udp");
576 echo_port
= sep
? ntohs((unsigned short) sep
->s_port
) : 7;
578 first_ping
= Config
.peers
;
582 neighborsUdpPing(HttpRequest
* request
,
589 const char *url
= entry
->url();
590 MemObject
*mem
= entry
->mem_obj
;
596 int queries_sent
= 0;
597 int peers_pinged
= 0;
598 int parent_timeout
= 0, parent_exprep
= 0;
599 int sibling_timeout
= 0, sibling_exprep
= 0;
600 int mcast_timeout
= 0, mcast_exprep
= 0;
602 if (Config
.peers
== NULL
)
605 assert(entry
->swap_status
== SWAPOUT_NONE
);
607 mem
->start_ping
= current_time
;
609 mem
->ping_reply_callback
= callback
;
611 mem
->ircb_data
= callback_data
;
613 reqnum
= icpSetCacheKey((const cache_key
*)entry
->key
);
615 for (i
= 0, p
= first_ping
; i
++ < Config
.npeers
; p
= p
->next
) {
619 debugs(15, 5, "neighborsUdpPing: Peer " << p
->host
);
621 if (!peerWouldBePinged(p
, request
))
622 continue; /* next peer */
626 debugs(15, 4, "neighborsUdpPing: pinging peer " << p
->host
<< " for '" << url
<< "'");
628 debugs(15, 3, "neighborsUdpPing: key = '" << entry
->getMD5Text() << "'");
630 debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum
);
633 if (p
->options
.htcp
&& !p
->options
.htcp_only_clr
) {
634 if (Config
.Port
.htcp
<= 0) {
635 debugs(15, DBG_CRITICAL
, "HTCP is disabled! Cannot send HTCP request to peer.");
639 debugs(15, 3, "neighborsUdpPing: sending HTCP query");
640 if (htcpQuery(entry
, request
, p
) <= 0)
641 continue; // unable to send.
645 if (Config
.Port
.icp
<= 0 || !Comm::IsConnOpen(icpOutgoingConn
)) {
646 debugs(15, DBG_CRITICAL
, "ICP is disabled! Cannot send ICP request to peer.");
650 if (p
->type
== PEER_MULTICAST
)
651 mcastSetTtl(icpOutgoingConn
->fd
, p
->mcast
.ttl
);
653 if (p
->icp
.port
== echo_port
) {
654 debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping");
655 query
= _icp_common_t::createMessage(ICP_DECHO
, 0, url
, reqnum
, 0);
656 icpUdpSend(icpOutgoingConn
->fd
, p
->in_addr
, query
, LOG_ICP_QUERY
, 0);
660 if (Config
.onoff
.query_icmp
)
661 if (p
->icp
.version
== ICP_VERSION_2
)
662 flags
|= ICP_FLAG_SRC_RTT
;
664 query
= _icp_common_t::createMessage(ICP_QUERY
, flags
, url
, reqnum
, 0);
666 icpUdpSend(icpOutgoingConn
->fd
, p
->in_addr
, query
, LOG_ICP_QUERY
, 0);
673 ++ p
->stats
.pings_sent
;
675 if (p
->type
== PEER_MULTICAST
) {
676 mcast_exprep
+= p
->mcast
.n_replies_expected
;
677 mcast_timeout
+= (p
->stats
.rtt
* p
->mcast
.n_replies_expected
);
678 } else if (neighborUp(p
)) {
679 /* its alive, expect a reply from it */
681 if (neighborType(p
, request
) == PEER_PARENT
) {
683 parent_timeout
+= p
->stats
.rtt
;
686 sibling_timeout
+= p
->stats
.rtt
;
689 /* Neighbor is dead; ping it anyway, but don't expect a reply */
690 /* log it once at the threshold */
692 if (p
->stats
.logged_state
== PEER_ALIVE
) {
693 debugs(15, DBG_IMPORTANT
, "Detected DEAD " << neighborTypeStr(p
) << ": " << p
->name
);
694 p
->stats
.logged_state
= PEER_DEAD
;
698 p
->stats
.last_query
= squid_curtime
;
701 * keep probe_start == 0 for a multicast peer,
702 * so neighborUp() never says this peer is dead.
705 if ((p
->type
!= PEER_MULTICAST
) && (p
->stats
.probe_start
== 0))
706 p
->stats
.probe_start
= squid_curtime
;
709 if ((first_ping
= first_ping
->next
) == NULL
)
710 first_ping
= Config
.peers
;
713 * How many replies to expect?
715 *exprep
= parent_exprep
+ sibling_exprep
+ mcast_exprep
;
718 * If there is a configured timeout, use it
720 if (Config
.Timeout
.icp_query
)
721 *timeout
= Config
.Timeout
.icp_query
;
725 *timeout
= 2 * parent_timeout
/ parent_exprep
;
726 else if (mcast_exprep
)
727 *timeout
= 2 * mcast_timeout
/ mcast_exprep
;
729 *timeout
= 2 * sibling_timeout
/ sibling_exprep
;
731 *timeout
= 2000; /* 2 seconds */
733 if (Config
.Timeout
.icp_query_max
)
734 if (*timeout
> Config
.Timeout
.icp_query_max
)
735 *timeout
= Config
.Timeout
.icp_query_max
;
737 if (*timeout
< Config
.Timeout
.icp_query_min
)
738 *timeout
= Config
.Timeout
.icp_query_min
;
744 /* lookup the digest of a given peer */
746 peerDigestLookup(peer
* p
, HttpRequest
* request
)
748 #if USE_CACHE_DIGESTS
749 const cache_key
*key
= request
? storeKeyPublicByRequest(request
) : NULL
;
752 debugs(15, 5, "peerDigestLookup: peer " << p
->host
);
753 /* does the peeer have a valid digest? */
756 debugs(15, 5, "peerDigestLookup: gone!");
758 } else if (!peerHTTPOkay(p
, request
)) {
759 debugs(15, 5, "peerDigestLookup: !peerHTTPOkay");
761 } else if (!p
->digest
->flags
.needed
) {
762 debugs(15, 5, "peerDigestLookup: note need");
763 peerDigestNeeded(p
->digest
);
765 } else if (!p
->digest
->flags
.usable
) {
766 debugs(15, 5, "peerDigestLookup: !ready && " << (p
->digest
->flags
.requested
? "" : "!") << "requested");
770 debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p
->host
);
771 assert(p
->digest
->cd
);
772 /* does digest predict a hit? */
774 if (!cacheDigestTest(p
->digest
->cd
, key
))
777 debugs(15, 5, "peerDigestLookup: peer " << p
->host
<< " says HIT!");
786 /* select best peer based on cache digests */
788 neighborsDigestSelect(HttpRequest
* request
)
791 #if USE_CACHE_DIGESTS
794 int choice_count
= 0;
795 int ichoice_count
= 0;
800 if (!request
->flags
.hierarchical
)
803 storeKeyPublicByRequest(request
);
805 for (i
= 0, p
= first_ping
; i
++ < Config
.npeers
; p
= p
->next
) {
814 lookup
= peerDigestLookup(p
, request
);
816 if (lookup
== LOOKUP_NONE
)
821 if (lookup
== LOOKUP_MISS
)
824 p_rtt
= netdbHostRtt(p
->host
);
826 debugs(15, 5, "neighborsDigestSelect: peer " << p
->host
<< " rtt: " << p_rtt
);
828 /* is this peer better than others in terms of rtt ? */
829 if (!best_p
|| (p_rtt
&& p_rtt
< best_rtt
)) {
833 if (p_rtt
) /* informative choice (aka educated guess) */
836 debugs(15, 4, "neighborsDigestSelect: peer " << p
->host
<< " leads with rtt " << best_rtt
);
840 debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count
<< " (" << ichoice_count
<< ")");
841 peerNoteDigestLookup(request
, best_p
,
842 best_p
? LOOKUP_HIT
: (choice_count
? LOOKUP_MISS
: LOOKUP_NONE
));
843 request
->hier
.n_choices
= choice_count
;
844 request
->hier
.n_ichoices
= ichoice_count
;
851 peerNoteDigestLookup(HttpRequest
* request
, peer
* p
, lookup_t lookup
)
853 #if USE_CACHE_DIGESTS
855 strncpy(request
->hier
.cd_host
, p
->host
, sizeof(request
->hier
.cd_host
));
857 *request
->hier
.cd_host
= '\0';
859 request
->hier
.cd_lookup
= lookup
;
860 debugs(15, 4, "peerNoteDigestLookup: peer " << (p
? p
->host
: "<none>") << ", lookup: " << lookup_t_str
[lookup
] );
865 neighborAlive(peer
* p
, const MemObject
* mem
, const icp_common_t
* header
)
868 ++ p
->stats
.pings_acked
;
870 if ((icp_opcode
) header
->opcode
<= ICP_END
)
871 ++ p
->icp
.counts
[header
->opcode
];
873 p
->icp
.version
= (int) header
->version
;
877 neighborUpdateRtt(peer
* p
, MemObject
* mem
)
879 int rtt
, rtt_av_factor
;
884 if (!mem
->start_ping
.tv_sec
)
887 rtt
= tvSubMsec(mem
->start_ping
, current_time
);
889 if (rtt
< 1 || rtt
> 10000)
892 rtt_av_factor
= RTT_AV_FACTOR
;
894 if (p
->options
.weighted_roundrobin
)
895 rtt_av_factor
= RTT_BACKGROUND_AV_FACTOR
;
897 p
->stats
.rtt
= Math::intAverage(p
->stats
.rtt
, rtt
, p
->stats
.pings_acked
, rtt_av_factor
);
902 neighborAliveHtcp(peer
* p
, const MemObject
* mem
, const htcpReplyData
* htcp
)
905 ++ p
->stats
.pings_acked
;
906 ++ p
->htcp
.counts
[htcp
->hit
? 1 : 0];
907 p
->htcp
.version
= htcp
->version
;
913 neighborCountIgnored(peer
* p
)
918 ++ p
->stats
.ignored_replies
;
923 static peer
*non_peers
= NULL
;
926 neighborIgnoreNonPeer(const Ip::Address
&from
, icp_opcode opcode
)
930 for (np
= non_peers
; np
; np
= np
->next
) {
931 if (np
->in_addr
!= from
)
934 if (np
->in_addr
.GetPort() != from
.GetPort())
941 np
= (peer
*)xcalloc(1, sizeof(peer
));
943 np
->icp
.port
= from
.GetPort();
944 np
->type
= PEER_NONE
;
945 np
->host
= new char[MAX_IPSTRLEN
];
946 from
.NtoA(np
->host
,MAX_IPSTRLEN
);
947 np
->next
= non_peers
;
951 ++ np
->icp
.counts
[opcode
];
953 if (isPowTen(++np
->stats
.ignored_replies
))
954 debugs(15, DBG_IMPORTANT
, "WARNING: Ignored " << np
->stats
.ignored_replies
<< " replies from non-peer " << np
->host
);
957 /* ignoreMulticastReply
959 * * We want to ignore replies from multicast peers if the
960 * * cache_host_domain rules would normally prevent the peer
964 ignoreMulticastReply(peer
* p
, MemObject
* mem
)
969 if (!p
->options
.mcast_responder
)
972 if (peerHTTPOkay(p
, mem
->request
))
979 * I should attach these records to the entry. We take the first
980 * hit we get our wait until everyone misses. The timeout handler
981 * call needs to nip this shopping list or call one of the misses.
983 * If a hit process is already started, then sobeit
986 neighborsUdpAck(const cache_key
* key
, icp_common_t
* header
, const Ip::Address
&from
)
990 MemObject
*mem
= NULL
;
991 peer_t ntype
= PEER_NONE
;
992 icp_opcode opcode
= (icp_opcode
) header
->opcode
;
994 debugs(15, 6, "neighborsUdpAck: opcode " << opcode
<< " '" << storeKeyText(key
) << "'");
996 if (NULL
!= (entry
= Store::Root().get(key
)))
997 mem
= entry
->mem_obj
;
999 if ((p
= whichPeer(from
)))
1000 neighborAlive(p
, mem
, header
);
1002 if (opcode
> ICP_END
)
1005 const char *opcode_d
= icp_opcode_str
[opcode
];
1008 neighborUpdateRtt(p
, mem
);
1010 /* Does the entry exist? */
1011 if (NULL
== entry
) {
1012 debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key
) << "' not found");
1013 neighborCountIgnored(p
);
1017 /* check if someone is already fetching it */
1018 if (EBIT_TEST(entry
->flags
, ENTRY_DISPATCHED
)) {
1019 debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key
) << "' already being fetched.");
1020 neighborCountIgnored(p
);
1025 debugs(15, 2, "Ignoring " << opcode_d
<< " for missing mem_obj: " << storeKeyText(key
));
1026 neighborCountIgnored(p
);
1030 if (entry
->ping_status
!= PING_WAITING
) {
1031 debugs(15, 2, "neighborsUdpAck: Late " << opcode_d
<< " for " << storeKeyText(key
));
1032 neighborCountIgnored(p
);
1036 if (entry
->lock_count
== 0) {
1037 // TODO: many entries are unlocked; why is this reported at level 1?
1038 debugs(12, DBG_IMPORTANT
, "neighborsUdpAck: '" << storeKeyText(key
) << "' has no locks");
1039 neighborCountIgnored(p
);
1043 debugs(15, 3, "neighborsUdpAck: " << opcode_d
<< " for '" << storeKeyText(key
) << "' from " << (p
? p
->host
: "source") << " ");
1046 ntype
= neighborType(p
, mem
->request
);
1049 if (ignoreMulticastReply(p
, mem
)) {
1050 neighborCountIgnored(p
);
1051 } else if (opcode
== ICP_MISS
) {
1053 neighborIgnoreNonPeer(from
, opcode
);
1055 mem
->ping_reply_callback(p
, ntype
, AnyP::PROTO_ICP
, header
, mem
->ircb_data
);
1057 } else if (opcode
== ICP_HIT
) {
1059 neighborIgnoreNonPeer(from
, opcode
);
1061 header
->opcode
= ICP_HIT
;
1062 mem
->ping_reply_callback(p
, ntype
, AnyP::PROTO_ICP
, header
, mem
->ircb_data
);
1064 } else if (opcode
== ICP_DECHO
) {
1066 neighborIgnoreNonPeer(from
, opcode
);
1067 } else if (ntype
== PEER_SIBLING
) {
1068 debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n");
1069 debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n");
1071 mem
->ping_reply_callback(p
, ntype
, AnyP::PROTO_ICP
, header
, mem
->ircb_data
);
1073 } else if (opcode
== ICP_SECHO
) {
1075 debugs(15, DBG_IMPORTANT
, "Ignoring SECHO from neighbor " << p
->host
);
1076 neighborCountIgnored(p
);
1078 debugs(15, DBG_IMPORTANT
, "Unsolicited SECHO from " << from
);
1080 } else if (opcode
== ICP_DENIED
) {
1082 neighborIgnoreNonPeer(from
, opcode
);
1083 } else if (p
->stats
.pings_acked
> 100) {
1084 if (100 * p
->icp
.counts
[ICP_DENIED
] / p
->stats
.pings_acked
> 95) {
1085 debugs(15, DBG_CRITICAL
, "95%% of replies from '" << p
->host
<< "' are UDP_DENIED");
1086 debugs(15, DBG_CRITICAL
, "Disabling '" << p
->host
<< "', please check your configuration.");
1090 neighborCountIgnored(p
);
1093 } else if (opcode
== ICP_MISS_NOFETCH
) {
1094 mem
->ping_reply_callback(p
, ntype
, AnyP::PROTO_ICP
, header
, mem
->ircb_data
);
1096 debugs(15, DBG_CRITICAL
, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d
);
1101 peerFindByName(const char *name
)
1105 for (p
= Config
.peers
; p
; p
= p
->next
) {
1106 if (!strcasecmp(name
, p
->name
))
1114 peerFindByNameAndPort(const char *name
, unsigned short port
)
1118 for (p
= Config
.peers
; p
; p
= p
->next
) {
1119 if (strcasecmp(name
, p
->name
))
1122 if (port
!= p
->http_port
)
1132 neighborUp(const peer
* p
)
1135 if (!peerProbeConnect((peer
*) p
)) {
1136 debugs(15, 8, "neighborUp: DOWN (probed): " << p
->host
<< " (" << p
->in_addr
<< ")");
1142 * The peer can not be UP if we don't have any IP addresses
1145 if (0 == p
->n_addresses
) {
1146 debugs(15, 8, "neighborUp: DOWN (no-ip): " << p
->host
<< " (" << p
->in_addr
<< ")");
1150 if (p
->options
.no_query
) {
1151 debugs(15, 8, "neighborUp: UP (no-query): " << p
->host
<< " (" << p
->in_addr
<< ")");
1155 if (p
->stats
.probe_start
!= 0 &&
1156 squid_curtime
- p
->stats
.probe_start
> Config
.Timeout
.deadPeer
) {
1157 debugs(15, 8, "neighborUp: DOWN (dead): " << p
->host
<< " (" << p
->in_addr
<< ")");
1161 debugs(15, 8, "neighborUp: UP: " << p
->host
<< " (" << p
->in_addr
<< ")");
1166 peerDestroy(void *data
)
1168 peer
*p
= (peer
*)data
;
1173 domain_ping
*nl
= NULL
;
1175 for (domain_ping
*l
= p
->peer_domain
; l
; l
= nl
) {
1177 safe_free(l
->domain
);
1183 safe_free(p
->domain
);
1184 #if USE_CACHE_DIGESTS
1186 cbdataReferenceDone(p
->digest
);
1191 peerNoteDigestGone(peer
* p
)
1193 #if USE_CACHE_DIGESTS
1194 cbdataReferenceDone(p
->digest
);
1199 peerDNSConfigure(const ipcache_addrs
*ia
, const DnsLookupDetails
&, void *data
)
1201 peer
*p
= (peer
*)data
;
1205 if (p
->n_addresses
== 0) {
1206 debugs(15, DBG_IMPORTANT
, "Configuring " << neighborTypeStr(p
) << " " << p
->host
<< "/" << p
->http_port
<< "/" << p
->icp
.port
);
1208 if (p
->type
== PEER_MULTICAST
)
1209 debugs(15, DBG_IMPORTANT
, " Multicast TTL = " << p
->mcast
.ttl
);
1215 debugs(0, DBG_CRITICAL
, "WARNING: DNS lookup for '" << p
->host
<< "' failed!");
1219 if ((int) ia
->count
< 1) {
1220 debugs(0, DBG_CRITICAL
, "WARNING: No IP address found for '" << p
->host
<< "'!");
1224 p
->tcp_up
= p
->connect_fail_limit
;
1226 for (j
= 0; j
< (int) ia
->count
&& j
< PEER_MAX_ADDRESSES
; ++j
) {
1227 p
->addresses
[j
] = ia
->in_addrs
[j
];
1228 debugs(15, 2, "--> IP address #" << j
<< ": " << p
->addresses
[j
]);
1232 p
->in_addr
.SetEmpty();
1233 p
->in_addr
= p
->addresses
[0];
1234 p
->in_addr
.SetPort(p
->icp
.port
);
1236 if (p
->type
== PEER_MULTICAST
)
1237 peerCountMcastPeersSchedule(p
, 10);
1240 if (p
->type
!= PEER_MULTICAST
)
1241 if (!p
->options
.no_netdb_exchange
)
1242 eventAddIsh("netdbExchangeStart", netdbExchangeStart
, p
, 30.0, 1);
1248 peerRefreshDNS(void *data
)
1252 if (eventFind(peerRefreshDNS
, NULL
))
1253 eventDelete(peerRefreshDNS
, NULL
);
1255 if (!data
&& 0 == stat5minClientRequests()) {
1256 /* no recent client traffic, wait a bit */
1257 eventAddIsh("peerRefreshDNS", peerRefreshDNS
, NULL
, 180.0, 1);
1261 for (p
= Config
.peers
; p
; p
= p
->next
)
1262 ipcache_nbgethostbyname(p
->host
, peerDNSConfigure
, p
);
1264 /* Reconfigure the peers every hour */
1265 eventAddIsh("peerRefreshDNS", peerRefreshDNS
, NULL
, 3600.0, 1);
1269 peerConnectFailedSilent(peer
* p
)
1271 p
->stats
.last_connect_failure
= squid_curtime
;
1274 debugs(15, 2, "TCP connection to " << p
->host
<< "/" << p
->http_port
<<
1282 debugs(15, DBG_IMPORTANT
, "Detected DEAD " << neighborTypeStr(p
) << ": " << p
->name
);
1283 p
->stats
.logged_state
= PEER_DEAD
;
1288 peerConnectFailed(peer
*p
)
1290 debugs(15, DBG_IMPORTANT
, "TCP connection to " << p
->host
<< "/" << p
->http_port
<< " failed");
1291 peerConnectFailedSilent(p
);
1295 peerConnectSucceded(peer
* p
)
1298 debugs(15, 2, "TCP connection to " << p
->host
<< "/" << p
->http_port
<< " succeded");
1299 p
->tcp_up
= p
->connect_fail_limit
; // NP: so peerAlive(p) works properly.
1301 if (!p
->n_addresses
)
1302 ipcache_nbgethostbyname(p
->host
, peerDNSConfigure
, p
);
1304 p
->tcp_up
= p
->connect_fail_limit
;
1308 * peerProbeConnect will be called on dead peers by neighborUp
1311 peerProbeConnect(peer
* p
)
1313 time_t ctimeout
= p
->connect_timeout
> 0 ? p
->connect_timeout
: Config
.Timeout
.peer_connect
;
1314 bool ret
= (squid_curtime
- p
->stats
.last_connect_failure
) > (ctimeout
* 10);
1316 if (p
->testing_now
> 0)
1317 return ret
;/* probe already running */
1319 if (squid_curtime
- p
->stats
.last_connect_probe
== 0)
1320 return ret
;/* don't probe to often */
1322 /* for each IP address of this peer. find one that we can connect to and probe it. */
1323 for (int i
= 0; i
< p
->n_addresses
; ++i
) {
1324 Comm::ConnectionPointer conn
= new Comm::Connection
;
1325 conn
->remote
= p
->addresses
[i
];
1326 conn
->remote
.SetPort(p
->http_port
);
1327 getOutgoingAddress(NULL
, conn
);
1331 AsyncCall::Pointer call
= commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone
, p
));
1332 Comm::ConnOpener
*cs
= new Comm::ConnOpener(conn
, call
, ctimeout
);
1333 cs
->setHost(p
->host
);
1334 AsyncJob::Start(cs
);
1337 p
->stats
.last_connect_probe
= squid_curtime
;
1343 peerProbeConnectDone(const Comm::ConnectionPointer
&conn
, comm_err_t status
, int xerrno
, void *data
)
1345 peer
*p
= (peer
*)data
;
1347 if (status
== COMM_OK
) {
1348 peerConnectSucceded(p
);
1350 peerConnectFailedSilent(p
);
1355 // TODO: log this traffic.
1359 peerCountMcastPeersSchedule(peer
* p
, time_t when
)
1361 if (p
->mcast
.flags
.count_event_pending
)
1364 eventAdd("peerCountMcastPeersStart",
1365 peerCountMcastPeersStart
,
1369 p
->mcast
.flags
.count_event_pending
= 1;
1373 peerCountMcastPeersStart(void *data
)
1375 peer
*p
= (peer
*)data
;
1379 icp_common_t
*query
;
1381 LOCAL_ARRAY(char, url
, MAX_URL
);
1382 assert(p
->type
== PEER_MULTICAST
);
1383 p
->mcast
.flags
.count_event_pending
= 0;
1384 snprintf(url
, MAX_URL
, "http://");
1385 p
->in_addr
.ToURL(url
+7, MAX_URL
-8 );
1387 fake
= storeCreateEntry(url
, url
, request_flags(), METHOD_GET
);
1388 HttpRequest
*req
= HttpRequest::CreateFromUrl(url
);
1389 psstate
= new ps_state
;
1390 psstate
->request
= HTTPMSGLOCK(req
);
1391 psstate
->entry
= fake
;
1392 psstate
->callback
= NULL
;
1393 psstate
->callback_data
= cbdataReference(p
);
1394 psstate
->ping
.start
= current_time
;
1395 mem
= fake
->mem_obj
;
1396 mem
->request
= HTTPMSGLOCK(psstate
->request
);
1397 mem
->start_ping
= current_time
;
1398 mem
->ping_reply_callback
= peerCountHandleIcpReply
;
1399 mem
->ircb_data
= psstate
;
1400 mcastSetTtl(icpOutgoingConn
->fd
, p
->mcast
.ttl
);
1401 p
->mcast
.id
= mem
->id
;
1402 reqnum
= icpSetCacheKey((const cache_key
*)fake
->key
);
1403 query
= _icp_common_t::createMessage(ICP_QUERY
, 0, url
, reqnum
, 0);
1404 icpUdpSend(icpOutgoingConn
->fd
, p
->in_addr
, query
, LOG_ICP_QUERY
, 0);
1405 fake
->ping_status
= PING_WAITING
;
1406 eventAdd("peerCountMcastPeersDone",
1407 peerCountMcastPeersDone
,
1409 Config
.Timeout
.mcast_icp_query
/ 1000.0, 1);
1410 p
->mcast
.flags
.counting
= 1;
1411 peerCountMcastPeersSchedule(p
, MCAST_COUNT_RATE
);
1415 peerCountMcastPeersDone(void *data
)
1417 ps_state
*psstate
= (ps_state
*)data
;
1418 StoreEntry
*fake
= psstate
->entry
;
1420 if (cbdataReferenceValid(psstate
->callback_data
)) {
1421 peer
*p
= (peer
*)psstate
->callback_data
;
1422 p
->mcast
.flags
.counting
= 0;
1423 p
->mcast
.avg_n_members
= Math::doubleAverage(p
->mcast
.avg_n_members
, (double) psstate
->ping
.n_recv
, ++p
->mcast
.n_times_counted
, 10);
1424 debugs(15, DBG_IMPORTANT
, "Group " << p
->host
<< ": " << psstate
->ping
.n_recv
<<
1425 " replies, "<< std::setw(4)<< std::setprecision(2) <<
1426 p
->mcast
.avg_n_members
<<" average, RTT " << p
->stats
.rtt
);
1427 p
->mcast
.n_replies_expected
= (int) p
->mcast
.avg_n_members
;
1430 cbdataReferenceDone(psstate
->callback_data
);
1432 fake
->abort(); // sets ENTRY_ABORTED and initiates releated cleanup
1433 HTTPMSGUNLOCK(fake
->mem_obj
->request
);
1435 HTTPMSGUNLOCK(psstate
->request
);
1436 cbdataFree(psstate
);
1440 peerCountHandleIcpReply(peer
* p
, peer_t type
, AnyP::ProtocolType proto
, void *hdrnotused
, void *data
)
1444 ps_state
*psstate
= (ps_state
*)data
;
1445 StoreEntry
*fake
= psstate
->entry
;
1446 MemObject
*mem
= fake
->mem_obj
;
1447 int rtt
= tvSubMsec(mem
->start_ping
, current_time
);
1448 assert(proto
== AnyP::PROTO_ICP
);
1451 ++ psstate
->ping
.n_recv
;
1452 rtt_av_factor
= RTT_AV_FACTOR
;
1454 if (p
->options
.weighted_roundrobin
)
1455 rtt_av_factor
= RTT_BACKGROUND_AV_FACTOR
;
1457 p
->stats
.rtt
= Math::intAverage(p
->stats
.rtt
, rtt
, psstate
->ping
.n_recv
, rtt_av_factor
);
1461 neighborDumpPeers(StoreEntry
* sentry
)
1463 dump_peers(sentry
, Config
.peers
);
1467 neighborDumpNonPeers(StoreEntry
* sentry
)
1469 dump_peers(sentry
, non_peers
);
1473 dump_peer_options(StoreEntry
* sentry
, peer
* p
)
1475 if (p
->options
.proxy_only
)
1476 storeAppendPrintf(sentry
, " proxy-only");
1478 if (p
->options
.no_query
)
1479 storeAppendPrintf(sentry
, " no-query");
1481 if (p
->options
.background_ping
)
1482 storeAppendPrintf(sentry
, " background-ping");
1484 if (p
->options
.no_digest
)
1485 storeAppendPrintf(sentry
, " no-digest");
1487 if (p
->options
.default_parent
)
1488 storeAppendPrintf(sentry
, " default");
1490 if (p
->options
.roundrobin
)
1491 storeAppendPrintf(sentry
, " round-robin");
1493 if (p
->options
.carp
)
1494 storeAppendPrintf(sentry
, " carp");
1497 if (p
->options
.userhash
)
1498 storeAppendPrintf(sentry
, " userhash");
1501 if (p
->options
.sourcehash
)
1502 storeAppendPrintf(sentry
, " sourcehash");
1504 if (p
->options
.weighted_roundrobin
)
1505 storeAppendPrintf(sentry
, " weighted-round-robin");
1507 if (p
->options
.mcast_responder
)
1508 storeAppendPrintf(sentry
, " multicast-responder");
1510 #if PEER_MULTICAST_SIBLINGS
1511 if (p
->options
.mcast_siblings
)
1512 storeAppendPrintf(sentry
, " multicast-siblings");
1516 storeAppendPrintf(sentry
, " weight=%d", p
->weight
);
1518 if (p
->options
.closest_only
)
1519 storeAppendPrintf(sentry
, " closest-only");
1522 if (p
->options
.htcp
) {
1523 storeAppendPrintf(sentry
, " htcp");
1524 if (p
->options
.htcp_oldsquid
|| p
->options
.htcp_no_clr
|| p
->options
.htcp_no_purge_clr
|| p
->options
.htcp_only_clr
) {
1526 if (p
->options
.htcp_oldsquid
)
1527 storeAppendPrintf(sentry
, "%soldsquid",(doneopts
++>0?",":"="));
1528 if (p
->options
.htcp_no_clr
)
1529 storeAppendPrintf(sentry
, "%sno-clr",(doneopts
++>0?",":"="));
1530 if (p
->options
.htcp_no_purge_clr
)
1531 storeAppendPrintf(sentry
, "%sno-purge-clr",(doneopts
++>0?",":"="));
1532 if (p
->options
.htcp_only_clr
)
1533 storeAppendPrintf(sentry
, "%sonly-clr",(doneopts
++>0?",":"="));
1538 if (p
->options
.no_netdb_exchange
)
1539 storeAppendPrintf(sentry
, " no-netdb-exchange");
1542 if (p
->options
.no_delay
)
1543 storeAppendPrintf(sentry
, " no-delay");
1547 storeAppendPrintf(sentry
, " login=%s", p
->login
);
1549 if (p
->mcast
.ttl
> 0)
1550 storeAppendPrintf(sentry
, " ttl=%d", p
->mcast
.ttl
);
1552 if (p
->connect_timeout
> 0)
1553 storeAppendPrintf(sentry
, " connect-timeout=%d", (int) p
->connect_timeout
);
1555 if (p
->connect_fail_limit
!= PEER_TCP_MAGIC_COUNT
)
1556 storeAppendPrintf(sentry
, " connect-fail-limit=%d", p
->connect_fail_limit
);
1558 #if USE_CACHE_DIGESTS
1561 storeAppendPrintf(sentry
, " digest-url=%s", p
->digest_url
);
1565 if (p
->options
.allow_miss
)
1566 storeAppendPrintf(sentry
, " allow-miss");
1568 if (p
->options
.no_tproxy
)
1569 storeAppendPrintf(sentry
, " no-tproxy");
1571 if (p
->max_conn
> 0)
1572 storeAppendPrintf(sentry
, " max-conn=%d", p
->max_conn
);
1574 if (p
->options
.originserver
)
1575 storeAppendPrintf(sentry
, " originserver");
1578 storeAppendPrintf(sentry
, " forceddomain=%s", p
->domain
);
1580 if (p
->connection_auth
== 0)
1581 storeAppendPrintf(sentry
, " connection-auth=off");
1582 else if (p
->connection_auth
== 1)
1583 storeAppendPrintf(sentry
, " connection-auth=on");
1584 else if (p
->connection_auth
== 2)
1585 storeAppendPrintf(sentry
, " connection-auth=auto");
1587 storeAppendPrintf(sentry
, "\n");
1591 dump_peers(StoreEntry
* sentry
, peer
* peers
)
1594 char ntoabuf
[MAX_IPSTRLEN
];
1595 domain_ping
*d
= NULL
;
1600 storeAppendPrintf(sentry
, "There are no neighbors installed.\n");
1602 for (e
= peers
; e
; e
= e
->next
) {
1603 assert(e
->host
!= NULL
);
1604 storeAppendPrintf(sentry
, "\n%-11.11s: %s\n",
1607 storeAppendPrintf(sentry
, "Host : %s/%d/%d\n",
1611 storeAppendPrintf(sentry
, "Flags :");
1612 dump_peer_options(sentry
, e
);
1614 for (i
= 0; i
< e
->n_addresses
; ++i
) {
1615 storeAppendPrintf(sentry
, "Address[%d] : %s\n", i
,
1616 e
->addresses
[i
].NtoA(ntoabuf
,MAX_IPSTRLEN
) );
1619 storeAppendPrintf(sentry
, "Status : %s\n",
1620 neighborUp(e
) ? "Up" : "Down");
1621 storeAppendPrintf(sentry
, "FETCHES : %d\n", e
->stats
.fetches
);
1622 storeAppendPrintf(sentry
, "OPEN CONNS : %d\n", e
->stats
.conn_open
);
1623 storeAppendPrintf(sentry
, "AVG RTT : %d msec\n", e
->stats
.rtt
);
1625 if (!e
->options
.no_query
) {
1626 storeAppendPrintf(sentry
, "LAST QUERY : %8d seconds ago\n",
1627 (int) (squid_curtime
- e
->stats
.last_query
));
1629 if (e
->stats
.last_reply
> 0)
1630 storeAppendPrintf(sentry
, "LAST REPLY : %8d seconds ago\n",
1631 (int) (squid_curtime
- e
->stats
.last_reply
));
1633 storeAppendPrintf(sentry
, "LAST REPLY : none received\n");
1635 storeAppendPrintf(sentry
, "PINGS SENT : %8d\n", e
->stats
.pings_sent
);
1637 storeAppendPrintf(sentry
, "PINGS ACKED: %8d %3d%%\n",
1638 e
->stats
.pings_acked
,
1639 Math::intPercent(e
->stats
.pings_acked
, e
->stats
.pings_sent
));
1642 storeAppendPrintf(sentry
, "IGNORED : %8d %3d%%\n", e
->stats
.ignored_replies
, Math::intPercent(e
->stats
.ignored_replies
, e
->stats
.pings_acked
));
1644 if (!e
->options
.no_query
) {
1645 storeAppendPrintf(sentry
, "Histogram of PINGS ACKED:\n");
1648 if (e
->options
.htcp
) {
1649 storeAppendPrintf(sentry
, "\tMisses\t%8d %3d%%\n",
1651 Math::intPercent(e
->htcp
.counts
[0], e
->stats
.pings_acked
));
1652 storeAppendPrintf(sentry
, "\tHits\t%8d %3d%%\n",
1654 Math::intPercent(e
->htcp
.counts
[1], e
->stats
.pings_acked
));
1658 for (op
= ICP_INVALID
; op
< ICP_END
; ++op
) {
1659 if (e
->icp
.counts
[op
] == 0)
1662 storeAppendPrintf(sentry
, " %12.12s : %8d %3d%%\n",
1665 Math::intPercent(e
->icp
.counts
[op
], e
->stats
.pings_acked
));
1676 if (e
->stats
.last_connect_failure
) {
1677 storeAppendPrintf(sentry
, "Last failed connect() at: %s\n",
1678 Time::FormatHttpd(e
->stats
.last_connect_failure
));
1681 if (e
->peer_domain
!= NULL
) {
1682 storeAppendPrintf(sentry
, "DOMAIN LIST: ");
1684 for (d
= e
->peer_domain
; d
; d
= d
->next
) {
1685 storeAppendPrintf(sentry
, "%s%s ",
1686 d
->do_ping
? null_string
: "!", d
->domain
);
1689 storeAppendPrintf(sentry
, "\n");
1692 storeAppendPrintf(sentry
, "keep-alive ratio: %d%%\n", Math::intPercent(e
->stats
.n_keepalives_recv
, e
->stats
.n_keepalives_sent
));
1698 neighborsHtcpReply(const cache_key
* key
, htcpReplyData
* htcp
, const Ip::Address
&from
)
1700 StoreEntry
*e
= Store::Root().get(key
);
1701 MemObject
*mem
= NULL
;
1703 peer_t ntype
= PEER_NONE
;
1704 debugs(15, 6, "neighborsHtcpReply: " <<
1705 (htcp
->hit
? "HIT" : "MISS") << " " <<
1706 storeKeyText(key
) );
1711 if ((p
= whichPeer(from
)))
1712 neighborAliveHtcp(p
, mem
, htcp
);
1714 /* Does the entry exist? */
1716 debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key
) << "' not found");
1717 neighborCountIgnored(p
);
1721 /* check if someone is already fetching it */
1722 if (EBIT_TEST(e
->flags
, ENTRY_DISPATCHED
)) {
1723 debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key
) << "' already being fetched.");
1724 neighborCountIgnored(p
);
1729 debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key
));
1730 neighborCountIgnored(p
);
1734 if (e
->ping_status
!= PING_WAITING
) {
1735 debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key
) << " is not PING_WAITING");
1736 neighborCountIgnored(p
);
1740 if (e
->lock_count
== 0) {
1741 // TODO: many entries are unlocked; why is this reported at level 1?
1742 debugs(12, DBG_IMPORTANT
, "neighborsUdpAck: '" << storeKeyText(key
) << "' has no locks");
1743 neighborCountIgnored(p
);
1748 ntype
= neighborType(p
, mem
->request
);
1749 neighborUpdateRtt(p
, mem
);
1752 if (ignoreMulticastReply(p
, mem
)) {
1753 neighborCountIgnored(p
);
1757 debugs(15, 3, "neighborsHtcpReply: e = " << e
);
1758 mem
->ping_reply_callback(p
, ntype
, AnyP::PROTO_HTCP
, htcp
, mem
->ircb_data
);
1762 * Send HTCP CLR messages to all peers configured to receive them.
1765 neighborsHtcpClear(StoreEntry
* e
, const char *uri
, HttpRequest
* req
, const HttpRequestMethod
&method
, htcp_clr_reason reason
)
1770 for (p
= Config
.peers
; p
; p
= p
->next
) {
1771 if (!p
->options
.htcp
) {
1774 if (p
->options
.htcp_no_clr
) {
1777 if (p
->options
.htcp_no_purge_clr
&& reason
== HTCP_CLR_PURGE
) {
1780 debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p
->in_addr
.ToURL(buf
, 128));
1781 htcpClear(e
, uri
, req
, method
, p
, reason
);