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 "ProtoPort.h"
35 #include "acl/FilledChecklist.h"
36 #include "comm/Connection.h"
37 #include "comm/ConnOpener.h"
38 #include "CacheManager.h"
41 #include "HttpRequest.h"
44 #include "MemObject.h"
45 #include "PeerDigest.h"
46 #include "PeerSelectState.h"
47 #include "SquidMath.h"
48 #include "SquidTime.h"
50 #include "icmp/net_db.h"
51 #include "ip/Address.h"
53 /* count mcast group peers every 15 minutes */
54 #define MCAST_COUNT_RATE 900
56 int peerAllowedToUse(const peer
*, HttpRequest
*);
57 static int peerWouldBePinged(const peer
*, HttpRequest
*);
58 static void neighborRemove(peer
*);
59 static void neighborAlive(peer
*, const MemObject
*, const icp_common_t
*);
61 static void neighborAliveHtcp(peer
*, const MemObject
*, const htcpReplyData
*);
63 static void neighborCountIgnored(peer
*);
64 static void peerRefreshDNS(void *);
65 static IPH peerDNSConfigure
;
66 static bool peerProbeConnect(peer
*);
67 static CNCB peerProbeConnectDone
;
68 static void peerCountMcastPeersDone(void *data
);
69 static void peerCountMcastPeersStart(void *data
);
70 static void peerCountMcastPeersSchedule(peer
* p
, time_t when
);
71 static IRCB peerCountHandleIcpReply
;
73 static void neighborIgnoreNonPeer(const Ip::Address
&, icp_opcode
);
74 static OBJH neighborDumpPeers
;
75 static OBJH neighborDumpNonPeers
;
76 static void dump_peers(StoreEntry
* sentry
, peer
* peers
);
78 static icp_common_t echo_hdr
;
79 static u_short echo_port
;
81 static int NLateReplies
= 0;
82 static peer
*first_ping
= NULL
;
85 neighborTypeStr(const peer
* p
)
87 if (p
->type
== PEER_NONE
)
90 if (p
->type
== PEER_SIBLING
)
93 if (p
->type
== PEER_MULTICAST
)
94 return "Multicast Group";
101 whichPeer(const Ip::Address
&from
)
106 debugs(15, 3, "whichPeer: from " << from
);
108 for (p
= Config
.peers
; p
; p
= p
->next
) {
109 for (j
= 0; j
< p
->n_addresses
; j
++) {
110 if (from
== p
->addresses
[j
] && from
.GetPort() == p
->icp
.port
) {
120 neighborType(const peer
* p
, const HttpRequest
* request
)
123 const struct _domain_type
*d
= NULL
;
125 for (d
= p
->typelist
; d
; d
= d
->next
) {
126 if (0 == matchDomainName(request
->GetHost(), d
->domain
))
127 if (d
->type
!= PEER_NONE
)
130 #if PEER_MULTICAST_SIBLINGS
131 if (p
->type
== PEER_MULTICAST
)
132 if (p
->options
.mcast_siblings
)
142 * this function figures out if it is appropriate to fetch REQUEST
146 peerAllowedToUse(const peer
* p
, HttpRequest
* request
)
149 const struct _domain_ping
*d
= NULL
;
151 assert(request
!= NULL
);
153 if (neighborType(p
, request
) == PEER_SIBLING
) {
154 #if PEER_MULTICAST_SIBLINGS
155 if (p
->type
== PEER_MULTICAST
&& p
->options
.mcast_siblings
&&
156 (request
->flags
.nocache
|| request
->flags
.refresh
|| request
->flags
.loopdetect
|| request
->flags
.need_validation
))
157 debugs(15, 2, "peerAllowedToUse(" << p
->name
<< ", " << request
->GetHost() << ") : multicast-siblings optimization match");
159 if (request
->flags
.nocache
)
162 if (request
->flags
.refresh
)
165 if (request
->flags
.loopdetect
)
168 if (request
->flags
.need_validation
)
172 if (p
->peer_domain
== NULL
&& p
->access
== NULL
)
177 for (d
= p
->peer_domain
; d
; d
= d
->next
) {
178 if (0 == matchDomainName(request
->GetHost(), d
->domain
)) {
179 do_ping
= d
->do_ping
;
183 do_ping
= !d
->do_ping
;
186 if (p
->peer_domain
&& 0 == do_ping
)
189 if (p
->access
== NULL
)
192 ACLFilledChecklist
checklist(p
->access
, request
, NULL
);
193 checklist
.src_addr
= request
->client_addr
;
194 checklist
.my_addr
= request
->my_addr
;
198 * this is currently broken because 'request->user_ident' has been
199 * moved to conn->rfc931 and we don't have access to the parent
200 * ConnStateData here.
202 if (request
->user_ident
[0])
203 xstrncpy(checklist
.rfc931
, request
->user_ident
, USER_IDENT_SZ
);
207 return checklist
.fastCheck();
210 /* Return TRUE if it is okay to send an ICP request to this peer. */
212 peerWouldBePinged(const peer
* p
, HttpRequest
* request
)
214 if (!peerAllowedToUse(p
, request
))
217 if (p
->options
.no_query
)
220 if (p
->options
.background_ping
&& (squid_curtime
- p
->stats
.last_query
< Config
.backgroundPingRate
))
223 if (p
->options
.mcast_responder
)
226 if (p
->n_addresses
== 0)
229 if (p
->icp
.port
== 0)
232 /* the case below seems strange, but can happen if the
233 * URL host is on the other side of a firewall */
234 if (p
->type
== PEER_SIBLING
)
235 if (!request
->flags
.hierarchical
)
238 /* Ping dead peers every timeout interval */
239 if (squid_curtime
- p
->stats
.last_query
> Config
.Timeout
.deadPeer
)
248 /* Return TRUE if it is okay to send an HTTP request to this peer. */
250 peerHTTPOkay(const peer
* p
, HttpRequest
* request
)
252 if (!peerAllowedToUse(p
, request
))
259 if (p
->stats
.conn_open
>= p
->max_conn
)
266 neighborsCount(HttpRequest
* request
)
271 for (p
= Config
.peers
; p
; p
= p
->next
)
272 if (peerWouldBePinged(p
, request
))
275 debugs(15, 3, "neighborsCount: " << count
);
281 getFirstUpParent(HttpRequest
* request
)
285 for (p
= Config
.peers
; p
; p
= p
->next
) {
289 if (neighborType(p
, request
) != PEER_PARENT
)
292 if (!peerHTTPOkay(p
, request
))
298 debugs(15, 3, "getFirstUpParent: returning " << (p
? p
->host
: "NULL"));
303 getRoundRobinParent(HttpRequest
* request
)
308 for (p
= Config
.peers
; p
; p
= p
->next
) {
309 if (!p
->options
.roundrobin
)
312 if (neighborType(p
, request
) != PEER_PARENT
)
315 if (!peerHTTPOkay(p
, request
))
322 if (p
->weight
== q
->weight
) {
323 if (q
->rr_count
< p
->rr_count
)
325 } else if ( (double) q
->rr_count
/ q
->weight
< (double) p
->rr_count
/ p
->weight
) {
336 debugs(15, 3, HERE
<< "returning " << (q
? q
->host
: "NULL"));
342 getWeightedRoundRobinParent(HttpRequest
* request
)
348 for (p
= Config
.peers
; p
; p
= p
->next
) {
349 if (!p
->options
.weighted_roundrobin
)
352 if (neighborType(p
, request
) != PEER_PARENT
)
355 if (!peerHTTPOkay(p
, request
))
358 if (q
&& q
->rr_count
< p
->rr_count
)
364 if (q
&& q
->rr_count
> 1000000)
365 for (p
= Config
.peers
; p
; p
= p
->next
) {
366 if (!p
->options
.weighted_roundrobin
)
369 if (neighborType(p
, request
) != PEER_PARENT
)
376 weighted_rtt
= (q
->stats
.rtt
- q
->basetime
) / q
->weight
;
378 if (weighted_rtt
< 1)
381 q
->rr_count
+= weighted_rtt
;
383 debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt
);
386 debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q
? q
->host
: "NULL"));
391 * This gets called every 5 minutes to clear the round-robin counter.
392 * The exact timing is an arbitrary default, set on estimate timing of a
393 * large number of requests in a high-performance environment during the
394 * period. The larger the number of requests between cycled resets the
395 * more balanced the operations.
398 \todo Make the reset timing a selectable parameter in squid.conf
401 peerClearRRLoop(void *data
)
404 eventAdd("peerClearRR", peerClearRRLoop
, data
, 5 * 60.0, 0);
408 * This gets called on startup and restart to kick off the peer round-robin
409 * maintenance event. It ensures that no matter how many times its called
410 * no more than one event is scheduled.
413 peerClearRRStart(void)
415 static int event_added
= 0;
417 peerClearRRLoop(NULL
);
422 * Called whenever the round-robin counters need to be reset to a sane state.
423 * So far those times are:
424 * - On startup and reconfigure - to set the counters to sane initial settings.
425 * - When a peer has revived from dead, to prevent the revived peer being
426 * flooded with requests which it has 'missed' during the down period.
432 for (p
= Config
.peers
; p
; p
= p
->next
) {
438 * Perform all actions when a peer is detected revived.
443 if (p
->stats
.logged_state
== PEER_DEAD
&& p
->tcp_up
) {
444 debugs(15, 1, "Detected REVIVED " << neighborTypeStr(p
) << ": " << p
->name
);
445 p
->stats
.logged_state
= PEER_ALIVE
;
449 p
->stats
.last_reply
= squid_curtime
;
450 p
->stats
.probe_start
= 0;
454 getDefaultParent(HttpRequest
* request
)
458 for (p
= Config
.peers
; p
; p
= p
->next
) {
459 if (neighborType(p
, request
) != PEER_PARENT
)
462 if (!p
->options
.default_parent
)
465 if (!peerHTTPOkay(p
, request
))
468 debugs(15, 3, "getDefaultParent: returning " << p
->host
);
473 debugs(15, 3, "getDefaultParent: returning NULL");
478 * XXX DW thinks this function is equivalent to/redundant with
479 * getFirstUpParent(). peerHTTPOkay() only returns true if the
480 * peer is UP anyway, so this function would not return a
484 getAnyParent(HttpRequest
* request
)
488 for (p
= Config
.peers
; p
; p
= p
->next
) {
489 if (neighborType(p
, request
) != PEER_PARENT
)
492 if (!peerHTTPOkay(p
, request
))
495 debugs(15, 3, "getAnyParent: returning " << p
->host
);
500 debugs(15, 3, "getAnyParent: returning NULL");
505 getNextPeer(peer
* p
)
517 neighborRemove(peer
* target
)
539 first_ping
= Config
.peers
;
543 neighborsRegisterWithCacheManager()
545 CacheManager
*manager
= CacheManager::GetInstance();
546 manager
->registerAction("server_list",
547 "Peer Cache Statistics",
548 neighborDumpPeers
, 0, 1);
550 if (theInIcpConnection
>= 0) {
551 manager
->registerAction("non_peers",
552 "List of Unknown sites sending ICP messages",
553 neighborDumpNonPeers
, 0, 1);
561 struct addrinfo
*AI
= NULL
;
562 struct servent
*sep
= NULL
;
563 const char *me
= getMyHostname();
564 peer
*thisPeer
= NULL
;
566 int fd
= theInIcpConnection
;
568 neighborsRegisterWithCacheManager();
570 /* setup addrinfo for use */
571 nul
.InitAddrInfo(AI
);
575 if (getsockname(fd
, AI
->ai_addr
, &AI
->ai_addrlen
) < 0)
576 debugs(15, 1, "getsockname(" << fd
<< "," << AI
->ai_addr
<< "," << &AI
->ai_addrlen
<< ") failed.");
578 for (thisPeer
= Config
.peers
; thisPeer
; thisPeer
= next
) {
579 http_port_list
*s
= NULL
;
580 next
= thisPeer
->next
;
582 if (0 != strcmp(thisPeer
->host
, me
))
585 for (s
= Config
.Sockaddr
.http
; s
; s
= s
->next
) {
586 if (thisPeer
->http_port
!= s
->s
.GetPort())
589 debugs(15, 1, "WARNING: Peer looks like this host");
591 debugs(15, 1, " Ignoring " <<
592 neighborTypeStr(thisPeer
) << " " << thisPeer
->host
<<
593 "/" << thisPeer
->http_port
<< "/" <<
596 neighborRemove(thisPeer
);
601 peerRefreshDNS((void *) 1);
603 if (ICP_INVALID
== echo_hdr
.opcode
) {
604 echo_hdr
.opcode
= ICP_SECHO
;
605 echo_hdr
.version
= ICP_VERSION_CURRENT
;
611 nul
.GetInAddr( *((struct in_addr
*)&echo_hdr
.shostid
) );
612 sep
= getservbyname("echo", "udp");
613 echo_port
= sep
? ntohs((u_short
) sep
->s_port
) : 7;
616 first_ping
= Config
.peers
;
617 nul
.FreeAddrInfo(AI
);
621 neighborsUdpPing(HttpRequest
* request
,
628 const char *url
= entry
->url();
629 MemObject
*mem
= entry
->mem_obj
;
635 int queries_sent
= 0;
636 int peers_pinged
= 0;
637 int parent_timeout
= 0, parent_exprep
= 0;
638 int sibling_timeout
= 0, sibling_exprep
= 0;
639 int mcast_timeout
= 0, mcast_exprep
= 0;
641 if (Config
.peers
== NULL
)
644 assert(entry
->swap_status
== SWAPOUT_NONE
);
646 mem
->start_ping
= current_time
;
648 mem
->ping_reply_callback
= callback
;
650 mem
->ircb_data
= callback_data
;
652 reqnum
= icpSetCacheKey((const cache_key
*)entry
->key
);
654 for (i
= 0, p
= first_ping
; i
++ < Config
.npeers
; p
= p
->next
) {
658 debugs(15, 5, "neighborsUdpPing: Peer " << p
->host
);
660 if (!peerWouldBePinged(p
, request
))
661 continue; /* next peer */
665 debugs(15, 4, "neighborsUdpPing: pinging peer " << p
->host
<< " for '" << url
<< "'");
667 debugs(15, 3, "neighborsUdpPing: key = '" << entry
->getMD5Text() << "'");
669 debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum
);
672 if (p
->options
.htcp
&& !p
->options
.htcp_only_clr
) {
673 if (Config
.Port
.htcp
<= 0) {
674 debugs(15, DBG_CRITICAL
, "HTCP is disabled! Cannot send HTCP request to peer.");
678 debugs(15, 3, "neighborsUdpPing: sending HTCP query");
679 if (htcpQuery(entry
, request
, p
) <= 0) continue; // unable to send.
683 if (Config
.Port
.icp
<= 0 || theOutIcpConnection
<= 0) {
684 debugs(15, DBG_CRITICAL
, "ICP is disabled! Cannot send ICP request to peer.");
688 if (p
->type
== PEER_MULTICAST
)
689 mcastSetTtl(theOutIcpConnection
, p
->mcast
.ttl
);
691 if (p
->icp
.port
== echo_port
) {
692 debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping");
693 echo_hdr
.reqnum
= reqnum
;
694 query
= _icp_common_t::createMessage(ICP_DECHO
, 0, url
, reqnum
, 0);
695 icpUdpSend(theOutIcpConnection
,p
->in_addr
,query
,LOG_ICP_QUERY
,0);
699 if (Config
.onoff
.query_icmp
)
700 if (p
->icp
.version
== ICP_VERSION_2
)
701 flags
|= ICP_FLAG_SRC_RTT
;
703 query
= _icp_common_t::createMessage(ICP_QUERY
, flags
, url
, reqnum
, 0);
705 icpUdpSend(theOutIcpConnection
, p
->in_addr
, query
, LOG_ICP_QUERY
, 0);
712 p
->stats
.pings_sent
++;
714 if (p
->type
== PEER_MULTICAST
) {
715 mcast_exprep
+= p
->mcast
.n_replies_expected
;
716 mcast_timeout
+= (p
->stats
.rtt
* p
->mcast
.n_replies_expected
);
717 } else if (neighborUp(p
)) {
718 /* its alive, expect a reply from it */
720 if (neighborType(p
, request
) == PEER_PARENT
) {
722 parent_timeout
+= p
->stats
.rtt
;
725 sibling_timeout
+= p
->stats
.rtt
;
728 /* Neighbor is dead; ping it anyway, but don't expect a reply */
729 /* log it once at the threshold */
731 if (p
->stats
.logged_state
== PEER_ALIVE
) {
732 debugs(15, 1, "Detected DEAD " << neighborTypeStr(p
) << ": " << p
->name
);
733 p
->stats
.logged_state
= PEER_DEAD
;
737 p
->stats
.last_query
= squid_curtime
;
740 * keep probe_start == 0 for a multicast peer,
741 * so neighborUp() never says this peer is dead.
744 if ((p
->type
!= PEER_MULTICAST
) && (p
->stats
.probe_start
== 0))
745 p
->stats
.probe_start
= squid_curtime
;
748 if ((first_ping
= first_ping
->next
) == NULL
)
749 first_ping
= Config
.peers
;
752 * How many replies to expect?
754 *exprep
= parent_exprep
+ sibling_exprep
+ mcast_exprep
;
757 * If there is a configured timeout, use it
759 if (Config
.Timeout
.icp_query
)
760 *timeout
= Config
.Timeout
.icp_query
;
764 *timeout
= 2 * parent_timeout
/ parent_exprep
;
765 else if (mcast_exprep
)
766 *timeout
= 2 * mcast_timeout
/ mcast_exprep
;
768 *timeout
= 2 * sibling_timeout
/ sibling_exprep
;
770 *timeout
= 2000; /* 2 seconds */
772 if (Config
.Timeout
.icp_query_max
)
773 if (*timeout
> Config
.Timeout
.icp_query_max
)
774 *timeout
= Config
.Timeout
.icp_query_max
;
776 if (*timeout
< Config
.Timeout
.icp_query_min
)
777 *timeout
= Config
.Timeout
.icp_query_min
;
783 /* lookup the digest of a given peer */
785 peerDigestLookup(peer
* p
, HttpRequest
* request
)
787 #if USE_CACHE_DIGESTS
788 const cache_key
*key
= request
? storeKeyPublicByRequest(request
) : NULL
;
791 debugs(15, 5, "peerDigestLookup: peer " << p
->host
);
792 /* does the peeer have a valid digest? */
795 debugs(15, 5, "peerDigestLookup: gone!");
797 } else if (!peerHTTPOkay(p
, request
)) {
798 debugs(15, 5, "peerDigestLookup: !peerHTTPOkay");
800 } else if (!p
->digest
->flags
.needed
) {
801 debugs(15, 5, "peerDigestLookup: note need");
802 peerDigestNeeded(p
->digest
);
804 } else if (!p
->digest
->flags
.usable
) {
805 debugs(15, 5, "peerDigestLookup: !ready && " << (p
->digest
->flags
.requested
? "" : "!") << "requested");
809 debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p
->host
);
810 assert(p
->digest
->cd
);
811 /* does digest predict a hit? */
813 if (!cacheDigestTest(p
->digest
->cd
, key
))
816 debugs(15, 5, "peerDigestLookup: peer " << p
->host
<< " says HIT!");
825 /* select best peer based on cache digests */
827 neighborsDigestSelect(HttpRequest
* request
)
830 #if USE_CACHE_DIGESTS
832 const cache_key
*key
;
834 int choice_count
= 0;
835 int ichoice_count
= 0;
840 if (!request
->flags
.hierarchical
)
843 key
= storeKeyPublicByRequest(request
);
845 for (i
= 0, p
= first_ping
; i
++ < Config
.npeers
; p
= p
->next
) {
854 lookup
= peerDigestLookup(p
, request
);
856 if (lookup
== LOOKUP_NONE
)
861 if (lookup
== LOOKUP_MISS
)
864 p_rtt
= netdbHostRtt(p
->host
);
866 debugs(15, 5, "neighborsDigestSelect: peer " << p
->host
<< " rtt: " << p_rtt
);
868 /* is this peer better than others in terms of rtt ? */
869 if (!best_p
|| (p_rtt
&& p_rtt
< best_rtt
)) {
873 if (p_rtt
) /* informative choice (aka educated guess) */
876 debugs(15, 4, "neighborsDigestSelect: peer " << p
->host
<< " leads with rtt " << best_rtt
);
880 debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count
<< " (" << ichoice_count
<< ")");
881 peerNoteDigestLookup(request
, best_p
,
882 best_p
? LOOKUP_HIT
: (choice_count
? LOOKUP_MISS
: LOOKUP_NONE
));
883 request
->hier
.n_choices
= choice_count
;
884 request
->hier
.n_ichoices
= ichoice_count
;
891 peerNoteDigestLookup(HttpRequest
* request
, peer
* p
, lookup_t lookup
)
893 #if USE_CACHE_DIGESTS
895 strncpy(request
->hier
.cd_host
, p
->host
, sizeof(request
->hier
.cd_host
));
897 *request
->hier
.cd_host
= '\0';
899 request
->hier
.cd_lookup
= lookup
;
900 debugs(15, 4, "peerNoteDigestLookup: peer " << (p
? p
->host
: "<none>") << ", lookup: " << lookup_t_str
[lookup
] );
905 neighborAlive(peer
* p
, const MemObject
* mem
, const icp_common_t
* header
)
908 p
->stats
.pings_acked
++;
910 if ((icp_opcode
) header
->opcode
<= ICP_END
)
911 p
->icp
.counts
[header
->opcode
]++;
913 p
->icp
.version
= (int) header
->version
;
917 neighborUpdateRtt(peer
* p
, MemObject
* mem
)
919 int rtt
, rtt_av_factor
;
924 if (!mem
->start_ping
.tv_sec
)
927 rtt
= tvSubMsec(mem
->start_ping
, current_time
);
929 if (rtt
< 1 || rtt
> 10000)
932 rtt_av_factor
= RTT_AV_FACTOR
;
934 if (p
->options
.weighted_roundrobin
)
935 rtt_av_factor
= RTT_BACKGROUND_AV_FACTOR
;
937 p
->stats
.rtt
= Math::intAverage(p
->stats
.rtt
, rtt
, p
->stats
.pings_acked
, rtt_av_factor
);
942 neighborAliveHtcp(peer
* p
, const MemObject
* mem
, const htcpReplyData
* htcp
)
945 p
->stats
.pings_acked
++;
946 p
->htcp
.counts
[htcp
->hit
? 1 : 0]++;
947 p
->htcp
.version
= htcp
->version
;
953 neighborCountIgnored(peer
* p
)
958 p
->stats
.ignored_replies
++;
963 static peer
*non_peers
= NULL
;
966 neighborIgnoreNonPeer(const Ip::Address
&from
, icp_opcode opcode
)
970 for (np
= non_peers
; np
; np
= np
->next
) {
971 if (np
->in_addr
!= from
)
974 if (np
->in_addr
.GetPort() != from
.GetPort())
981 np
= (peer
*)xcalloc(1, sizeof(peer
));
983 np
->icp
.port
= from
.GetPort();
984 np
->type
= PEER_NONE
;
985 np
->host
= new char[MAX_IPSTRLEN
];
986 from
.NtoA(np
->host
,MAX_IPSTRLEN
);
987 np
->next
= non_peers
;
991 np
->icp
.counts
[opcode
]++;
993 if (isPowTen(++np
->stats
.ignored_replies
))
994 debugs(15, 1, "WARNING: Ignored " << np
->stats
.ignored_replies
<< " replies from non-peer " << np
->host
);
997 /* ignoreMulticastReply
999 * * We want to ignore replies from multicast peers if the
1000 * * cache_host_domain rules would normally prevent the peer
1004 ignoreMulticastReply(peer
* p
, MemObject
* mem
)
1009 if (!p
->options
.mcast_responder
)
1012 if (peerHTTPOkay(p
, mem
->request
))
1019 * I should attach these records to the entry. We take the first
1020 * hit we get our wait until everyone misses. The timeout handler
1021 * call needs to nip this shopping list or call one of the misses.
1023 * If a hit process is already started, then sobeit
1026 neighborsUdpAck(const cache_key
* key
, icp_common_t
* header
, const Ip::Address
&from
)
1030 MemObject
*mem
= NULL
;
1031 peer_t ntype
= PEER_NONE
;
1032 icp_opcode opcode
= (icp_opcode
) header
->opcode
;
1034 debugs(15, 6, "neighborsUdpAck: opcode " << opcode
<< " '" << storeKeyText(key
) << "'");
1036 if (NULL
!= (entry
= Store::Root().get(key
)))
1037 mem
= entry
->mem_obj
;
1039 if ((p
= whichPeer(from
)))
1040 neighborAlive(p
, mem
, header
);
1042 if (opcode
> ICP_END
)
1045 const char *opcode_d
= icp_opcode_str
[opcode
];
1048 neighborUpdateRtt(p
, mem
);
1050 /* Does the entry exist? */
1051 if (NULL
== entry
) {
1052 debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key
) << "' not found");
1053 neighborCountIgnored(p
);
1057 /* check if someone is already fetching it */
1058 if (EBIT_TEST(entry
->flags
, ENTRY_DISPATCHED
)) {
1059 debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key
) << "' already being fetched.");
1060 neighborCountIgnored(p
);
1065 debugs(15, 2, "Ignoring " << opcode_d
<< " for missing mem_obj: " << storeKeyText(key
));
1066 neighborCountIgnored(p
);
1070 if (entry
->ping_status
!= PING_WAITING
) {
1071 debugs(15, 2, "neighborsUdpAck: Late " << opcode_d
<< " for " << storeKeyText(key
));
1072 neighborCountIgnored(p
);
1076 if (entry
->lock_count
== 0) {
1077 debugs(12, 1, "neighborsUdpAck: '" << storeKeyText(key
) << "' has no locks");
1078 neighborCountIgnored(p
);
1082 debugs(15, 3, "neighborsUdpAck: " << opcode_d
<< " for '" << storeKeyText(key
) << "' from " << (p
? p
->host
: "source") << " ");
1085 ntype
= neighborType(p
, mem
->request
);
1088 if (ignoreMulticastReply(p
, mem
)) {
1089 neighborCountIgnored(p
);
1090 } else if (opcode
== ICP_MISS
) {
1092 neighborIgnoreNonPeer(from
, opcode
);
1094 mem
->ping_reply_callback(p
, ntype
, PROTO_ICP
, header
, mem
->ircb_data
);
1096 } else if (opcode
== ICP_HIT
) {
1098 neighborIgnoreNonPeer(from
, opcode
);
1100 header
->opcode
= ICP_HIT
;
1101 mem
->ping_reply_callback(p
, ntype
, PROTO_ICP
, header
, mem
->ircb_data
);
1103 } else if (opcode
== ICP_DECHO
) {
1105 neighborIgnoreNonPeer(from
, opcode
);
1106 } else if (ntype
== PEER_SIBLING
) {
1107 debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n");
1108 debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n");
1110 mem
->ping_reply_callback(p
, ntype
, PROTO_ICP
, header
, mem
->ircb_data
);
1112 } else if (opcode
== ICP_SECHO
) {
1114 debugs(15, 1, "Ignoring SECHO from neighbor " << p
->host
);
1115 neighborCountIgnored(p
);
1117 debugs(15, 1, "Unsolicited SECHO from " << from
);
1119 } else if (opcode
== ICP_DENIED
) {
1121 neighborIgnoreNonPeer(from
, opcode
);
1122 } else if (p
->stats
.pings_acked
> 100) {
1123 if (100 * p
->icp
.counts
[ICP_DENIED
] / p
->stats
.pings_acked
> 95) {
1124 debugs(15, 0, "95%% of replies from '" << p
->host
<< "' are UDP_DENIED");
1125 debugs(15, 0, "Disabling '" << p
->host
<< "', please check your configuration.");
1129 neighborCountIgnored(p
);
1132 } else if (opcode
== ICP_MISS_NOFETCH
) {
1133 mem
->ping_reply_callback(p
, ntype
, PROTO_ICP
, header
, mem
->ircb_data
);
1135 debugs(15, 0, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d
);
1140 peerFindByName(const char *name
)
1144 for (p
= Config
.peers
; p
; p
= p
->next
) {
1145 if (!strcasecmp(name
, p
->name
))
1153 peerFindByNameAndPort(const char *name
, unsigned short port
)
1157 for (p
= Config
.peers
; p
; p
= p
->next
) {
1158 if (strcasecmp(name
, p
->name
))
1161 if (port
!= p
->http_port
)
1171 neighborUp(const peer
* p
)
1174 if (!peerProbeConnect((peer
*) p
)) {
1175 debugs(15, 8, "neighborUp: DOWN (probed): " << p
->host
<< " (" << p
->in_addr
<< ")");
1181 * The peer can not be UP if we don't have any IP addresses
1184 if (0 == p
->n_addresses
) {
1185 debugs(15, 8, "neighborUp: DOWN (no-ip): " << p
->host
<< " (" << p
->in_addr
<< ")");
1189 if (p
->options
.no_query
) {
1190 debugs(15, 8, "neighborUp: UP (no-query): " << p
->host
<< " (" << p
->in_addr
<< ")");
1194 if (p
->stats
.probe_start
!= 0 &&
1195 squid_curtime
- p
->stats
.probe_start
> Config
.Timeout
.deadPeer
) {
1196 debugs(15, 8, "neighborUp: DOWN (dead): " << p
->host
<< " (" << p
->in_addr
<< ")");
1200 debugs(15, 8, "neighborUp: UP: " << p
->host
<< " (" << p
->in_addr
<< ")");
1205 peerDestroy(void *data
)
1207 peer
*p
= (peer
*)data
;
1209 struct _domain_ping
*l
= NULL
;
1211 struct _domain_ping
*nl
= NULL
;
1216 for (l
= p
->peer_domain
; l
; l
= nl
) {
1218 safe_free(l
->domain
);
1224 safe_free(p
->domain
);
1225 #if USE_CACHE_DIGESTS
1227 cbdataReferenceDone(p
->digest
);
1232 peerNoteDigestGone(peer
* p
)
1234 #if USE_CACHE_DIGESTS
1235 cbdataReferenceDone(p
->digest
);
1240 peerDNSConfigure(const ipcache_addrs
*ia
, const DnsLookupDetails
&, void *data
)
1242 peer
*p
= (peer
*)data
;
1246 if (p
->n_addresses
== 0) {
1247 debugs(15, 1, "Configuring " << neighborTypeStr(p
) << " " << p
->host
<< "/" << p
->http_port
<< "/" << p
->icp
.port
);
1249 if (p
->type
== PEER_MULTICAST
)
1250 debugs(15, 1, " Multicast TTL = " << p
->mcast
.ttl
);
1256 debugs(0, 0, "WARNING: DNS lookup for '" << p
->host
<< "' failed!");
1260 if ((int) ia
->count
< 1) {
1261 debugs(0, 0, "WARNING: No IP address found for '" << p
->host
<< "'!");
1265 p
->tcp_up
= p
->connect_fail_limit
;
1267 for (j
= 0; j
< (int) ia
->count
&& j
< PEER_MAX_ADDRESSES
; j
++) {
1268 p
->addresses
[j
] = ia
->in_addrs
[j
];
1269 debugs(15, 2, "--> IP address #" << j
<< ": " << p
->addresses
[j
]);
1273 p
->in_addr
.SetEmpty();
1274 p
->in_addr
= p
->addresses
[0];
1275 p
->in_addr
.SetPort(p
->icp
.port
);
1277 if (p
->type
== PEER_MULTICAST
)
1278 peerCountMcastPeersSchedule(p
, 10);
1281 if (p
->type
!= PEER_MULTICAST
)
1282 if (!p
->options
.no_netdb_exchange
)
1283 eventAddIsh("netdbExchangeStart", netdbExchangeStart
, p
, 30.0, 1);
1289 peerRefreshDNS(void *data
)
1293 if (eventFind(peerRefreshDNS
, NULL
))
1294 eventDelete(peerRefreshDNS
, NULL
);
1296 if (!data
&& 0 == stat5minClientRequests()) {
1297 /* no recent client traffic, wait a bit */
1298 eventAddIsh("peerRefreshDNS", peerRefreshDNS
, NULL
, 180.0, 1);
1302 for (p
= Config
.peers
; p
; p
= p
->next
)
1303 ipcache_nbgethostbyname(p
->host
, peerDNSConfigure
, p
);
1305 /* Reconfigure the peers every hour */
1306 eventAddIsh("peerRefreshDNS", peerRefreshDNS
, NULL
, 3600.0, 1);
1310 peerConnectFailedSilent(peer
* p
)
1312 p
->stats
.last_connect_failure
= squid_curtime
;
1315 debugs(15, 2, "TCP connection to " << p
->host
<< "/" << p
->http_port
<<
1323 debugs(15, 1, "Detected DEAD " << neighborTypeStr(p
) << ": " << p
->name
);
1324 p
->stats
.logged_state
= PEER_DEAD
;
1329 peerConnectFailed(peer
*p
)
1331 debugs(15, 1, "TCP connection to " << p
->host
<< "/" << p
->http_port
<< " failed");
1332 peerConnectFailedSilent(p
);
1336 peerConnectSucceded(peer
* p
)
1339 debugs(15, 2, "TCP connection to " << p
->host
<< "/" << p
->http_port
<< " succeded");
1340 p
->tcp_up
= p
->connect_fail_limit
; // NP: so peerAlive(p) works properly.
1342 if (!p
->n_addresses
)
1343 ipcache_nbgethostbyname(p
->host
, peerDNSConfigure
, p
);
1345 p
->tcp_up
= p
->connect_fail_limit
;
1349 * peerProbeConnect will be called on dead peers by neighborUp
1352 peerProbeConnect(peer
* p
)
1354 time_t ctimeout
= p
->connect_timeout
> 0 ? p
->connect_timeout
: Config
.Timeout
.peer_connect
;
1355 bool ret
= (squid_curtime
- p
->stats
.last_connect_failure
) > (ctimeout
* 10);
1357 if (p
->testing_now
> 0)
1358 return ret
;/* probe already running */
1360 if (squid_curtime
- p
->stats
.last_connect_probe
== 0)
1361 return ret
;/* don't probe to often */
1363 /* for each IP address of this peer. find one that we can connect to and probe it. */
1364 for (int i
= 0; i
< p
->n_addresses
; i
++) {
1365 Comm::ConnectionPointer conn
= new Comm::Connection
;
1366 conn
->remote
= p
->addresses
[i
];
1367 conn
->remote
.SetPort(p
->http_port
);
1368 getOutgoingAddress(NULL
, conn
);
1372 AsyncCall::Pointer call
= commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone
, p
));
1373 Comm::ConnOpener
*cs
= new Comm::ConnOpener(conn
, call
, ctimeout
);
1374 cs
->setHost(p
->host
);
1375 AsyncJob::AsyncStart(cs
);
1378 p
->stats
.last_connect_probe
= squid_curtime
;
1384 peerProbeConnectDone(Comm::ConnectionPointer
&conn
, comm_err_t status
, int xerrno
, void *data
)
1386 peer
*p
= (peer
*)data
;
1388 if (status
== COMM_OK
) {
1389 peerConnectSucceded(p
);
1391 peerConnectFailedSilent(p
);
1400 peerCountMcastPeersSchedule(peer
* p
, time_t when
)
1402 if (p
->mcast
.flags
.count_event_pending
)
1405 eventAdd("peerCountMcastPeersStart",
1406 peerCountMcastPeersStart
,
1410 p
->mcast
.flags
.count_event_pending
= 1;
1414 peerCountMcastPeersStart(void *data
)
1416 peer
*p
= (peer
*)data
;
1420 icp_common_t
*query
;
1422 LOCAL_ARRAY(char, url
, MAX_URL
);
1423 assert(p
->type
== PEER_MULTICAST
);
1424 p
->mcast
.flags
.count_event_pending
= 0;
1425 snprintf(url
, MAX_URL
, "http://");
1426 p
->in_addr
.ToURL(url
+7, MAX_URL
-8 );
1428 fake
= storeCreateEntry(url
, url
, request_flags(), METHOD_GET
);
1429 HttpRequest
*req
= HttpRequest::CreateFromUrl(url
);
1430 psstate
= new ps_state
;
1431 psstate
->request
= HTTPMSGLOCK(req
);
1432 psstate
->entry
= fake
;
1433 psstate
->callback
= NULL
;
1434 psstate
->callback_data
= cbdataReference(p
);
1435 psstate
->ping
.start
= current_time
;
1436 mem
= fake
->mem_obj
;
1437 mem
->request
= HTTPMSGLOCK(psstate
->request
);
1438 mem
->start_ping
= current_time
;
1439 mem
->ping_reply_callback
= peerCountHandleIcpReply
;
1440 mem
->ircb_data
= psstate
;
1441 mcastSetTtl(theOutIcpConnection
, p
->mcast
.ttl
);
1442 p
->mcast
.id
= mem
->id
;
1443 reqnum
= icpSetCacheKey((const cache_key
*)fake
->key
);
1444 query
= _icp_common_t::createMessage(ICP_QUERY
, 0, url
, reqnum
, 0);
1445 icpUdpSend(theOutIcpConnection
,
1450 fake
->ping_status
= PING_WAITING
;
1451 eventAdd("peerCountMcastPeersDone",
1452 peerCountMcastPeersDone
,
1454 Config
.Timeout
.mcast_icp_query
/ 1000.0, 1);
1455 p
->mcast
.flags
.counting
= 1;
1456 peerCountMcastPeersSchedule(p
, MCAST_COUNT_RATE
);
1460 peerCountMcastPeersDone(void *data
)
1462 ps_state
*psstate
= (ps_state
*)data
;
1463 StoreEntry
*fake
= psstate
->entry
;
1465 if (cbdataReferenceValid(psstate
->callback_data
)) {
1466 peer
*p
= (peer
*)psstate
->callback_data
;
1467 p
->mcast
.flags
.counting
= 0;
1468 p
->mcast
.avg_n_members
= Math::doubleAverage(p
->mcast
.avg_n_members
, (double) psstate
->ping
.n_recv
, ++p
->mcast
.n_times_counted
, 10);
1469 debugs(15, 1, "Group " << p
->host
<< ": " << psstate
->ping
.n_recv
<<
1470 " replies, "<< std::setw(4)<< std::setprecision(2) <<
1471 p
->mcast
.avg_n_members
<<" average, RTT " << p
->stats
.rtt
);
1472 p
->mcast
.n_replies_expected
= (int) p
->mcast
.avg_n_members
;
1475 cbdataReferenceDone(psstate
->callback_data
);
1477 EBIT_SET(fake
->flags
, ENTRY_ABORTED
);
1478 HTTPMSGUNLOCK(fake
->mem_obj
->request
);
1479 fake
->releaseRequest();
1481 HTTPMSGUNLOCK(psstate
->request
);
1482 cbdataFree(psstate
);
1486 peerCountHandleIcpReply(peer
* p
, peer_t type
, protocol_t proto
, void *hdrnotused
, void *data
)
1490 ps_state
*psstate
= (ps_state
*)data
;
1491 StoreEntry
*fake
= psstate
->entry
;
1492 MemObject
*mem
= fake
->mem_obj
;
1493 int rtt
= tvSubMsec(mem
->start_ping
, current_time
);
1494 assert(proto
== PROTO_ICP
);
1497 psstate
->ping
.n_recv
++;
1498 rtt_av_factor
= RTT_AV_FACTOR
;
1500 if (p
->options
.weighted_roundrobin
)
1501 rtt_av_factor
= RTT_BACKGROUND_AV_FACTOR
;
1503 p
->stats
.rtt
= Math::intAverage(p
->stats
.rtt
, rtt
, psstate
->ping
.n_recv
, rtt_av_factor
);
1507 neighborDumpPeers(StoreEntry
* sentry
)
1509 dump_peers(sentry
, Config
.peers
);
1513 neighborDumpNonPeers(StoreEntry
* sentry
)
1515 dump_peers(sentry
, non_peers
);
1519 dump_peer_options(StoreEntry
* sentry
, peer
* p
)
1521 if (p
->options
.proxy_only
)
1522 storeAppendPrintf(sentry
, " proxy-only");
1524 if (p
->options
.no_query
)
1525 storeAppendPrintf(sentry
, " no-query");
1527 if (p
->options
.background_ping
)
1528 storeAppendPrintf(sentry
, " background-ping");
1530 if (p
->options
.no_digest
)
1531 storeAppendPrintf(sentry
, " no-digest");
1533 if (p
->options
.default_parent
)
1534 storeAppendPrintf(sentry
, " default");
1536 if (p
->options
.roundrobin
)
1537 storeAppendPrintf(sentry
, " round-robin");
1539 if (p
->options
.carp
)
1540 storeAppendPrintf(sentry
, " carp");
1542 if (p
->options
.userhash
)
1543 storeAppendPrintf(sentry
, " userhash");
1545 if (p
->options
.userhash
)
1546 storeAppendPrintf(sentry
, " sourcehash");
1548 if (p
->options
.weighted_roundrobin
)
1549 storeAppendPrintf(sentry
, " weighted-round-robin");
1551 if (p
->options
.mcast_responder
)
1552 storeAppendPrintf(sentry
, " multicast-responder");
1554 #if PEER_MULTICAST_SIBLINGS
1555 if (p
->options
.mcast_siblings
)
1556 storeAppendPrintf(sentry
, " multicast-siblings");
1560 storeAppendPrintf(sentry
, " weight=%d", p
->weight
);
1562 if (p
->options
.closest_only
)
1563 storeAppendPrintf(sentry
, " closest-only");
1566 if (p
->options
.htcp
) {
1567 storeAppendPrintf(sentry
, " htcp");
1568 if (p
->options
.htcp_oldsquid
|| p
->options
.htcp_no_clr
|| p
->options
.htcp_no_purge_clr
|| p
->options
.htcp_only_clr
) {
1570 if (p
->options
.htcp_oldsquid
)
1571 storeAppendPrintf(sentry
, "%soldsquid",(doneopts
++>0?",":"="));
1572 if (p
->options
.htcp_no_clr
)
1573 storeAppendPrintf(sentry
, "%sno-clr",(doneopts
++>0?",":"="));
1574 if (p
->options
.htcp_no_purge_clr
)
1575 storeAppendPrintf(sentry
, "%sno-purge-clr",(doneopts
++>0?",":"="));
1576 if (p
->options
.htcp_only_clr
)
1577 storeAppendPrintf(sentry
, "%sonly-clr",(doneopts
++>0?",":"="));
1582 if (p
->options
.no_netdb_exchange
)
1583 storeAppendPrintf(sentry
, " no-netdb-exchange");
1587 if (p
->options
.no_delay
)
1588 storeAppendPrintf(sentry
, " no-delay");
1593 storeAppendPrintf(sentry
, " login=%s", p
->login
);
1595 if (p
->mcast
.ttl
> 0)
1596 storeAppendPrintf(sentry
, " ttl=%d", p
->mcast
.ttl
);
1598 if (p
->connect_timeout
> 0)
1599 storeAppendPrintf(sentry
, " connect-timeout=%d", (int) p
->connect_timeout
);
1601 if (p
->connect_fail_limit
!= PEER_TCP_MAGIC_COUNT
)
1602 storeAppendPrintf(sentry
, " connect-fail-limit=%d", p
->connect_fail_limit
);
1604 #if USE_CACHE_DIGESTS
1607 storeAppendPrintf(sentry
, " digest-url=%s", p
->digest_url
);
1611 if (p
->options
.allow_miss
)
1612 storeAppendPrintf(sentry
, " allow-miss");
1614 if (p
->options
.no_tproxy
)
1615 storeAppendPrintf(sentry
, " no-tproxy");
1617 if (p
->max_conn
> 0)
1618 storeAppendPrintf(sentry
, " max-conn=%d", p
->max_conn
);
1620 if (p
->options
.originserver
)
1621 storeAppendPrintf(sentry
, " originserver");
1624 storeAppendPrintf(sentry
, " forceddomain=%s", p
->domain
);
1626 if (p
->connection_auth
== 0)
1627 storeAppendPrintf(sentry
, " connection-auth=off");
1628 else if (p
->connection_auth
== 1)
1629 storeAppendPrintf(sentry
, " connection-auth=on");
1630 else if (p
->connection_auth
== 2)
1631 storeAppendPrintf(sentry
, " connection-auth=auto");
1633 storeAppendPrintf(sentry
, "\n");
1637 dump_peers(StoreEntry
* sentry
, peer
* peers
)
1640 char ntoabuf
[MAX_IPSTRLEN
];
1641 struct _domain_ping
*d
= NULL
;
1646 storeAppendPrintf(sentry
, "There are no neighbors installed.\n");
1648 for (e
= peers
; e
; e
= e
->next
) {
1649 assert(e
->host
!= NULL
);
1650 storeAppendPrintf(sentry
, "\n%-11.11s: %s\n",
1653 storeAppendPrintf(sentry
, "Host : %s/%d/%d\n",
1657 storeAppendPrintf(sentry
, "Flags :");
1658 dump_peer_options(sentry
, e
);
1660 for (i
= 0; i
< e
->n_addresses
; i
++) {
1661 storeAppendPrintf(sentry
, "Address[%d] : %s\n", i
,
1662 e
->addresses
[i
].NtoA(ntoabuf
,MAX_IPSTRLEN
) );
1665 storeAppendPrintf(sentry
, "Status : %s\n",
1666 neighborUp(e
) ? "Up" : "Down");
1667 storeAppendPrintf(sentry
, "FETCHES : %d\n", e
->stats
.fetches
);
1668 storeAppendPrintf(sentry
, "OPEN CONNS : %d\n", e
->stats
.conn_open
);
1669 storeAppendPrintf(sentry
, "AVG RTT : %d msec\n", e
->stats
.rtt
);
1671 if (!e
->options
.no_query
) {
1672 storeAppendPrintf(sentry
, "LAST QUERY : %8d seconds ago\n",
1673 (int) (squid_curtime
- e
->stats
.last_query
));
1675 if (e
->stats
.last_reply
> 0)
1676 storeAppendPrintf(sentry
, "LAST REPLY : %8d seconds ago\n",
1677 (int) (squid_curtime
- e
->stats
.last_reply
));
1679 storeAppendPrintf(sentry
, "LAST REPLY : none received\n");
1681 storeAppendPrintf(sentry
, "PINGS SENT : %8d\n", e
->stats
.pings_sent
);
1683 storeAppendPrintf(sentry
, "PINGS ACKED: %8d %3d%%\n",
1684 e
->stats
.pings_acked
,
1685 Math::intPercent(e
->stats
.pings_acked
, e
->stats
.pings_sent
));
1688 storeAppendPrintf(sentry
, "IGNORED : %8d %3d%%\n", e
->stats
.ignored_replies
, Math::intPercent(e
->stats
.ignored_replies
, e
->stats
.pings_acked
));
1690 if (!e
->options
.no_query
) {
1691 storeAppendPrintf(sentry
, "Histogram of PINGS ACKED:\n");
1694 if (e
->options
.htcp
) {
1695 storeAppendPrintf(sentry
, "\tMisses\t%8d %3d%%\n",
1697 Math::intPercent(e
->htcp
.counts
[0], e
->stats
.pings_acked
));
1698 storeAppendPrintf(sentry
, "\tHits\t%8d %3d%%\n",
1700 Math::intPercent(e
->htcp
.counts
[1], e
->stats
.pings_acked
));
1704 for (op
= ICP_INVALID
; op
< ICP_END
; ++op
) {
1705 if (e
->icp
.counts
[op
] == 0)
1708 storeAppendPrintf(sentry
, " %12.12s : %8d %3d%%\n",
1711 Math::intPercent(e
->icp
.counts
[op
], e
->stats
.pings_acked
));
1722 if (e
->stats
.last_connect_failure
) {
1723 storeAppendPrintf(sentry
, "Last failed connect() at: %s\n",
1724 mkhttpdlogtime(&(e
->stats
.last_connect_failure
)));
1727 if (e
->peer_domain
!= NULL
) {
1728 storeAppendPrintf(sentry
, "DOMAIN LIST: ");
1730 for (d
= e
->peer_domain
; d
; d
= d
->next
) {
1731 storeAppendPrintf(sentry
, "%s%s ",
1732 d
->do_ping
? null_string
: "!", d
->domain
);
1735 storeAppendPrintf(sentry
, "\n");
1738 storeAppendPrintf(sentry
, "keep-alive ratio: %d%%\n", Math::intPercent(e
->stats
.n_keepalives_recv
, e
->stats
.n_keepalives_sent
));
1744 neighborsHtcpReply(const cache_key
* key
, htcpReplyData
* htcp
, const Ip::Address
&from
)
1746 StoreEntry
*e
= Store::Root().get(key
);
1747 MemObject
*mem
= NULL
;
1749 peer_t ntype
= PEER_NONE
;
1750 debugs(15, 6, "neighborsHtcpReply: " <<
1751 (htcp
->hit
? "HIT" : "MISS") << " " <<
1752 storeKeyText(key
) );
1757 if ((p
= whichPeer(from
)))
1758 neighborAliveHtcp(p
, mem
, htcp
);
1760 /* Does the entry exist? */
1762 debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key
) << "' not found");
1763 neighborCountIgnored(p
);
1767 /* check if someone is already fetching it */
1768 if (EBIT_TEST(e
->flags
, ENTRY_DISPATCHED
)) {
1769 debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key
) << "' already being fetched.");
1770 neighborCountIgnored(p
);
1775 debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key
));
1776 neighborCountIgnored(p
);
1780 if (e
->ping_status
!= PING_WAITING
) {
1781 debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key
) << " is not PING_WAITING");
1782 neighborCountIgnored(p
);
1786 if (e
->lock_count
== 0) {
1787 debugs(12, 1, "neighborsUdpAck: '" << storeKeyText(key
) << "' has no locks");
1788 neighborCountIgnored(p
);
1793 ntype
= neighborType(p
, mem
->request
);
1794 neighborUpdateRtt(p
, mem
);
1797 if (ignoreMulticastReply(p
, mem
)) {
1798 neighborCountIgnored(p
);
1802 debugs(15, 3, "neighborsHtcpReply: e = " << e
);
1803 mem
->ping_reply_callback(p
, ntype
, PROTO_HTCP
, htcp
, mem
->ircb_data
);
1807 * Send HTCP CLR messages to all peers configured to receive them.
1810 neighborsHtcpClear(StoreEntry
* e
, const char *uri
, HttpRequest
* req
, const HttpRequestMethod
&method
, htcp_clr_reason reason
)
1815 for (p
= Config
.peers
; p
; p
= p
->next
) {
1816 if (!p
->options
.htcp
) {
1819 if (p
->options
.htcp_no_clr
) {
1822 if (p
->options
.htcp_no_purge_clr
&& reason
== HTCP_CLR_PURGE
) {
1825 debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p
->in_addr
.ToURL(buf
, 128));
1826 htcpClear(e
, uri
, req
, method
, p
, reason
);