2 * DEBUG: section 12 Internet Cache Protocol (ICP)
3 * AUTHOR: Duane Wessels
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 \defgroup ServerProtocolICPInternal2 ICPv2 Internals
35 \ingroup ServerProtocolICPAPI
39 #include "AccessLogEntry.h"
41 #include "acl/FilledChecklist.h"
42 #include "client_db.h"
44 #include "comm/Connection.h"
45 #include "comm/Loops.h"
46 #include "comm/UdpOpenDialer.h"
48 #include "HttpRequest.h"
49 #include "icmp/net_db.h"
51 #include "ip/Address.h"
55 #include "neighbors.h"
59 #include "SquidTime.h"
60 #include "StatCounters.h"
62 #include "store_key_md5.h"
71 static void icpIncomingConnectionOpened(const Comm::ConnectionPointer
&conn
, int errNo
);
73 /// \ingroup ServerProtocolICPInternal2
74 static void icpLogIcp(const Ip::Address
&, log_type
, int, const char *, int);
76 /// \ingroup ServerProtocolICPInternal2
77 static void icpHandleIcpV2(int, Ip::Address
&, char *, int);
79 /// \ingroup ServerProtocolICPInternal2
80 static void icpCount(void *, int, size_t, int);
83 \ingroup ServerProtocolICPInternal2
84 * IcpQueueHead is global so comm_incoming() knows whether or not
85 * to call icpUdpSendQueue.
87 static icpUdpData
*IcpQueueHead
= NULL
;
88 /// \ingroup ServerProtocolICPInternal2
89 static icpUdpData
*IcpQueueTail
= NULL
;
91 /// \ingroup ServerProtocolICPInternal2
92 Comm::ConnectionPointer icpIncomingConn
= NULL
;
93 /// \ingroup ServerProtocolICPInternal2
94 Comm::ConnectionPointer icpOutgoingConn
= NULL
;
97 _icp_common_t::_icp_common_t() : opcode(ICP_INVALID
), version(0), length(0), reqnum(0), flags(0), pad(0), shostid(0)
100 _icp_common_t::_icp_common_t(char *buf
, unsigned int len
)
102 if (len
< sizeof(_icp_common_t
)) {
103 /* mark as invalid */
108 memcpy(this, buf
, sizeof(icp_common_t
));
110 * Convert network order sensitive fields
112 length
= ntohs(length
);
113 reqnum
= ntohl(reqnum
);
114 flags
= ntohl(flags
);
119 _icp_common_t::getOpCode() const
121 if (opcode
> (char)ICP_END
)
124 return (icp_opcode
)opcode
;
129 ICPState::ICPState(icp_common_t
&aHeader
, HttpRequest
*aRequest
):
131 request(HTTPMSGLOCK(aRequest
)),
136 ICPState::~ICPState()
139 HTTPMSGUNLOCK(request
);
146 /// \ingroup ServerProtocolICPInternal2
147 class ICP2State
: public ICPState
, public StoreClient
151 ICP2State(icp_common_t
& aHeader
, HttpRequest
*aRequest
):
152 ICPState(aHeader
, aRequest
),rtt(0),src_rtt(0),flags(0) {}
155 void created(StoreEntry
* newEntry
);
162 ICP2State::~ICP2State()
166 ICP2State::created(StoreEntry
*newEntry
)
168 StoreEntry
*entry
= newEntry
->isNull () ? NULL
: newEntry
;
169 debugs(12, 5, "icpHandleIcpV2: OPCODE " << icp_opcode_str
[header
.opcode
]);
170 icp_opcode codeToSend
;
172 if (icpCheckUdpHit(entry
, request
)) {
173 codeToSend
= ICP_HIT
;
176 if (Config
.onoff
.test_reachability
&& rtt
== 0) {
177 if ((rtt
= netdbHostRtt(request
->GetHost())) == 0)
178 netdbPingSite(request
->GetHost());
180 #endif /* USE_ICMP */
182 if (icpGetCommonOpcode() != ICP_ERR
)
183 codeToSend
= icpGetCommonOpcode();
184 else if (Config
.onoff
.test_reachability
&& rtt
== 0)
185 codeToSend
= ICP_MISS_NOFETCH
;
187 codeToSend
= ICP_MISS
;
190 icpCreateAndSend(codeToSend
, flags
, url
, header
.reqnum
, src_rtt
, fd
, from
);
196 /// \ingroup ServerProtocolICPInternal2
198 icpLogIcp(const Ip::Address
&caddr
, log_type logcode
, int len
, const char *url
, int delay
)
200 AccessLogEntry::Pointer al
= new AccessLogEntry();
202 if (LOG_TAG_NONE
== logcode
)
205 if (LOG_ICP_QUERY
== logcode
)
208 clientdbUpdate(caddr
, logcode
, AnyP::PROTO_ICP
, len
);
210 if (!Config
.onoff
.log_udp
)
213 al
->icp
.opcode
= ICP_QUERY
;
217 al
->cache
.caddr
= caddr
;
219 al
->cache
.replySize
= len
;
221 al
->cache
.code
= logcode
;
223 al
->cache
.msec
= delay
;
225 accessLogLog(al
, NULL
);
228 /// \ingroup ServerProtocolICPInternal2
230 icpUdpSendQueue(int fd
, void *unused
)
234 while ((q
= IcpQueueHead
) != NULL
) {
235 int delay
= tvSubUsec(q
->queue_time
, current_time
);
236 /* increment delay to prevent looping */
237 const int x
= icpUdpSend(fd
, q
->address
, (icp_common_t
*) q
->msg
, q
->logcode
, ++delay
);
238 IcpQueueHead
= q
->next
;
247 _icp_common_t::createMessage(
255 icp_common_t
*headerp
= NULL
;
256 char *urloffset
= NULL
;
258 buf_len
= sizeof(icp_common_t
) + strlen(url
) + 1;
260 if (opcode
== ICP_QUERY
)
261 buf_len
+= sizeof(uint32_t);
263 buf
= (char *) xcalloc(buf_len
, 1);
265 headerp
= (icp_common_t
*) (void *) buf
;
267 headerp
->opcode
= (char) opcode
;
269 headerp
->version
= ICP_VERSION_CURRENT
;
271 headerp
->length
= (uint16_t) htons(buf_len
);
273 headerp
->reqnum
= htonl(reqnum
);
275 headerp
->flags
= htonl(flags
);
277 headerp
->pad
= htonl(pad
);
279 headerp
->shostid
= 0;
281 urloffset
= buf
+ sizeof(icp_common_t
);
283 if (opcode
== ICP_QUERY
)
284 urloffset
+= sizeof(uint32_t);
286 memcpy(urloffset
, url
, strlen(url
));
288 return (icp_common_t
*)buf
;
293 const Ip::Address
&to
,
301 len
= (int) ntohs(msg
->length
);
302 debugs(12, 5, "icpUdpSend: FD " << fd
<< " sending " <<
303 icp_opcode_str
[msg
->opcode
] << ", " << len
<< " bytes to " << to
);
305 x
= comm_udp_sendto(fd
, to
, msg
, len
);
308 /* successfully written */
309 icpLogIcp(to
, logcode
, len
, (char *) (msg
+ 1), delay
);
310 icpCount(msg
, SENT
, (size_t) len
, delay
);
312 } else if (0 == delay
) {
313 /* send failed, but queue it */
314 queue
= (icpUdpData
*) xcalloc(1, sizeof(icpUdpData
));
317 queue
->len
= (int) ntohs(msg
->length
);
318 queue
->queue_time
= current_time
;
319 queue
->logcode
= logcode
;
321 if (IcpQueueHead
== NULL
) {
322 IcpQueueHead
= queue
;
323 IcpQueueTail
= queue
;
324 } else if (IcpQueueTail
== IcpQueueHead
) {
325 IcpQueueTail
= queue
;
326 IcpQueueHead
->next
= queue
;
328 IcpQueueTail
->next
= queue
;
329 IcpQueueTail
= queue
;
332 Comm::SetSelect(fd
, COMM_SELECT_WRITE
, icpUdpSendQueue
, NULL
, 0);
333 ++statCounter
.icp
.replies_queued
;
336 ++statCounter
.icp
.replies_dropped
;
343 icpCheckUdpHit(StoreEntry
* e
, HttpRequest
* request
)
348 if (!e
->validToSend())
351 if (Config
.onoff
.icp_hit_stale
)
354 if (refreshCheckICP(e
, request
))
361 * This routine selects an ICP opcode for ICP misses.
363 \retval ICP_ERR no opcode selected here
364 \retval ICP_MISS_NOFETCH store is rebuilding, no fetch is possible yet
369 /* if store is rebuilding, return a UDP_MISS_NOFETCH */
371 if ((StoreController::store_dirs_rebuilding
&& opt_reload_hit_only
) ||
372 hit_only_mode_until
> squid_curtime
) {
373 return ICP_MISS_NOFETCH
;
380 icpLogFromICPCode(icp_opcode opcode
)
382 if (opcode
== ICP_ERR
)
383 return LOG_UDP_INVALID
;
385 if (opcode
== ICP_DENIED
)
386 return LOG_UDP_DENIED
;
388 if (opcode
== ICP_HIT
)
391 if (opcode
== ICP_MISS
)
394 if (opcode
== ICP_MISS_NOFETCH
)
395 return LOG_UDP_MISS_NOFETCH
;
397 fatal("expected ICP opcode\n");
399 return LOG_UDP_INVALID
;
403 icpCreateAndSend(icp_opcode opcode
, int flags
, char const *url
, int reqnum
, int pad
, int fd
, const Ip::Address
&from
)
405 icp_common_t
*reply
= _icp_common_t::createMessage(opcode
, flags
, url
, reqnum
, pad
);
406 icpUdpSend(fd
, from
, reply
, icpLogFromICPCode(opcode
), 0);
410 icpDenyAccess(Ip::Address
&from
, char *url
, int reqnum
, int fd
)
412 debugs(12, 2, "icpDenyAccess: Access Denied for " << from
<< " by " << AclMatchedName
<< ".");
414 if (clientdbCutoffDenied(from
)) {
416 * count this DENIED query in the clientdb, even though
417 * we're not sending an ICP reply...
419 clientdbUpdate(from
, LOG_UDP_DENIED
, AnyP::PROTO_ICP
, 0);
421 icpCreateAndSend(ICP_DENIED
, 0, url
, reqnum
, 0, fd
, from
);
426 icpAccessAllowed(Ip::Address
&from
, HttpRequest
* icp_request
)
428 /* absent an explicit allow, we deny all */
429 if (!Config
.accessList
.icp
)
432 ACLFilledChecklist
checklist(Config
.accessList
.icp
, icp_request
, NULL
);
433 checklist
.src_addr
= from
;
434 checklist
.my_addr
.SetNoAddr();
435 return (checklist
.fastCheck() == ACCESS_ALLOWED
);
439 icpGetUrlToSend(char *url
)
441 if (strpbrk(url
, w_space
))
442 return rfc1738_escape(url
);
448 icpGetRequest(char *url
, int reqnum
, int fd
, Ip::Address
&from
)
450 if (strpbrk(url
, w_space
)) {
451 url
= rfc1738_escape(url
);
452 icpCreateAndSend(ICP_ERR
, 0, rfc1738_escape(url
), reqnum
, 0, fd
, from
);
458 if ((result
= HttpRequest::CreateFromUrl(url
)) == NULL
)
459 icpCreateAndSend(ICP_ERR
, 0, url
, reqnum
, 0, fd
, from
);
466 doV2Query(int fd
, Ip::Address
&from
, char *buf
, icp_common_t header
)
471 /* We have a valid packet */
472 char *url
= buf
+ sizeof(icp_common_t
) + sizeof(uint32_t);
473 HttpRequest
*icp_request
= icpGetRequest(url
, header
.reqnum
, fd
, from
);
478 HTTPMSGLOCK(icp_request
);
480 if (!icpAccessAllowed(from
, icp_request
)) {
481 icpDenyAccess(from
, url
, header
.reqnum
, fd
);
482 HTTPMSGUNLOCK(icp_request
);
486 if (header
.flags
& ICP_FLAG_SRC_RTT
) {
487 rtt
= netdbHostRtt(icp_request
->GetHost());
488 int hops
= netdbHostHops(icp_request
->GetHost());
489 src_rtt
= ((hops
& 0xFFFF) << 16) | (rtt
& 0xFFFF);
492 flags
|= ICP_FLAG_SRC_RTT
;
494 #endif /* USE_ICMP */
496 /* The peer is allowed to use this cache */
497 ICP2State
*state
= new ICP2State (header
, icp_request
);
503 state
->url
= xstrdup (url
);
505 state
->flags
= flags
;
509 state
->src_rtt
= src_rtt
;
511 StoreEntry::getPublic (state
, url
, METHOD_GET
);
513 HTTPMSGUNLOCK(icp_request
);
517 _icp_common_t::handleReply(char *buf
, Ip::Address
&from
)
519 if (neighbors_do_private_keys
&& reqnum
== 0) {
520 debugs(12, DBG_CRITICAL
, "icpHandleIcpV2: Neighbor " << from
<< " returned reqnum = 0");
521 debugs(12, DBG_CRITICAL
, "icpHandleIcpV2: Disabling use of private keys");
522 neighbors_do_private_keys
= 0;
525 char *url
= buf
+ sizeof(icp_common_t
);
526 debugs(12, 3, "icpHandleIcpV2: " << icp_opcode_str
[opcode
] << " from " << from
<< " for '" << url
<< "'");
528 const cache_key
*key
= icpGetCacheKey(url
, (int) reqnum
);
529 /* call neighborsUdpAck even if ping_status != PING_WAITING */
530 neighborsUdpAck(key
, this, from
);
534 icpHandleIcpV2(int fd
, Ip::Address
&from
, char *buf
, int len
)
537 debugs(12, 3, "icpHandleIcpV2: ICP message is too small");
541 icp_common_t
header(buf
, len
);
543 * Length field should match the number of bytes read
546 if (len
!= header
.length
) {
547 debugs(12, 3, "icpHandleIcpV2: ICP message is too small");
551 switch (header
.opcode
) {
554 /* We have a valid packet */
555 doV2Query(fd
, from
, buf
, header
);
566 case ICP_MISS_NOFETCH
:
567 header
.handleReply(buf
, from
);
576 debugs(12, DBG_CRITICAL
, "icpHandleIcpV2: UNKNOWN OPCODE: " << header
.opcode
<< " from " << from
);
584 icpPktDump(icp_common_t
* pkt
)
588 debugs(12, 9, "opcode: " << std::setw(3) << pkt
->opcode
<< " " << icp_opcode_str
[pkt
->opcode
]);
589 debugs(12, 9, "version: "<< std::left
<< std::setw(8) << pkt
->version
);
590 debugs(12, 9, "length: "<< std::left
<< std::setw(8) << ntohs(pkt
->length
));
591 debugs(12, 9, "reqnum: "<< std::left
<< std::setw(8) << ntohl(pkt
->reqnum
));
592 debugs(12, 9, "flags: "<< std::left
<< std::hex
<< std::setw(8) << ntohl(pkt
->flags
));
593 a
= (struct in_addr
)pkt
->shostid
;
594 debugs(12, 9, "shostid: " << a
);
595 debugs(12, 9, "payload: " << (char *) pkt
+ sizeof(icp_common_t
));
601 icpHandleUdp(int sock
, void *data
)
603 int *N
= &incoming_sockets_accepted
;
606 LOCAL_ARRAY(char, buf
, SQUID_UDP_SO_RCVBUF
);
609 int max
= INCOMING_UDP_MAX
;
610 Comm::SetSelect(sock
, COMM_SELECT_READ
, icpHandleUdp
, NULL
, 0);
614 len
= comm_udp_recvfrom(sock
,
616 SQUID_UDP_SO_RCVBUF
- 1,
624 if (ignoreErrno(errno
))
628 /* Some Linux systems seem to set the FD for reading and then
629 * return ECONNREFUSED when sendto() fails and generates an ICMP
630 * port unreachable message. */
631 /* or maybe an EHOSTUNREACH "No route to host" message */
632 if (errno
!= ECONNREFUSED
&& errno
!= EHOSTUNREACH
)
635 debugs(50, DBG_IMPORTANT
, "icpHandleUdp: FD " << sock
<< " recvfrom: " << xstrerror());
641 icpCount(buf
, RECV
, (size_t) len
, 0);
643 debugs(12, 4, "icpHandleUdp: FD " << sock
<< ": received " <<
644 (unsigned long int)len
<< " bytes from " << from
);
646 #ifdef ICP_PACKET_DUMP
651 if ((size_t) len
< sizeof(icp_common_t
)) {
652 debugs(12, 4, "icpHandleUdp: Ignoring too-small UDP packet");
656 icp_version
= (int) buf
[1]; /* cheat! */
658 if (icpOutgoingConn
->local
== from
)
659 // ignore ICP packets which loop back (multicast usually)
660 debugs(12, 4, "icpHandleUdp: Ignoring UDP packet sent by myself");
661 else if (icp_version
== ICP_VERSION_2
)
662 icpHandleIcpV2(sock
, from
, buf
, len
);
663 else if (icp_version
== ICP_VERSION_3
)
664 icpHandleIcpV3(sock
, from
, buf
, len
);
666 debugs(12, DBG_IMPORTANT
, "WARNING: Unused ICP version " << icp_version
<<
667 " received from " << from
);
676 if ((port
= Config
.Port
.icp
) <= 0)
679 icpIncomingConn
= new Comm::Connection
;
680 icpIncomingConn
->local
= Config
.Addrs
.udp_incoming
;
681 icpIncomingConn
->local
.SetPort(port
);
683 if (!Ip::EnableIpv6
&& !icpIncomingConn
->local
.SetIPv4()) {
684 debugs(12, DBG_CRITICAL
, "ERROR: IPv6 is disabled. " << icpIncomingConn
->local
<< " is not an IPv4 address.");
685 fatal("ICP port cannot be opened.");
687 /* split-stack for now requires default IPv4-only ICP */
688 if (Ip::EnableIpv6
&IPV6_SPECIAL_SPLITSTACK
&& icpIncomingConn
->local
.IsAnyAddr()) {
689 icpIncomingConn
->local
.SetIPv4();
692 AsyncCall::Pointer call
= asyncCall(12, 2,
693 "icpIncomingConnectionOpened",
694 Comm::UdpOpenDialer(&icpIncomingConnectionOpened
));
696 Ipc::StartListening(SOCK_DGRAM
,
699 Ipc::fdnInIcpSocket
, call
);
701 if ( !Config
.Addrs
.udp_outgoing
.IsNoAddr() ) {
702 icpOutgoingConn
= new Comm::Connection
;
703 icpOutgoingConn
->local
= Config
.Addrs
.udp_outgoing
;
704 icpOutgoingConn
->local
.SetPort(port
);
706 if (!Ip::EnableIpv6
&& !icpOutgoingConn
->local
.SetIPv4()) {
707 debugs(49, DBG_CRITICAL
, "ERROR: IPv6 is disabled. " << icpOutgoingConn
->local
<< " is not an IPv4 address.");
708 fatal("ICP port cannot be opened.");
710 /* split-stack for now requires default IPv4-only ICP */
711 if (Ip::EnableIpv6
&IPV6_SPECIAL_SPLITSTACK
&& icpOutgoingConn
->local
.IsAnyAddr()) {
712 icpOutgoingConn
->local
.SetIPv4();
716 comm_open_listener(SOCK_DGRAM
, IPPROTO_UDP
, icpOutgoingConn
, "Outgoing ICP Port");
719 if (!Comm::IsConnOpen(icpOutgoingConn
))
720 fatal("Cannot open Outgoing ICP Port");
722 debugs(12, DBG_CRITICAL
, "Sending ICP messages from " << icpOutgoingConn
->local
);
724 Comm::SetSelect(icpOutgoingConn
->fd
, COMM_SELECT_READ
, icpHandleUdp
, NULL
, 0);
725 fd_note(icpOutgoingConn
->fd
, "Outgoing ICP socket");
730 icpIncomingConnectionOpened(const Comm::ConnectionPointer
&conn
, int errNo
)
732 if (!Comm::IsConnOpen(conn
))
733 fatal("Cannot open ICP Port");
735 Comm::SetSelect(conn
->fd
, COMM_SELECT_READ
, icpHandleUdp
, NULL
, 0);
737 for (const wordlist
*s
= Config
.mcast_group_list
; s
; s
= s
->next
)
738 ipcache_nbgethostbyname(s
->key
, mcastJoinGroups
, NULL
); // XXX: pass the conn for mcastJoinGroups usage.
740 debugs(12, DBG_IMPORTANT
, "Accepting ICP messages on " << conn
->local
);
742 fd_note(conn
->fd
, "Incoming ICP port");
744 if (Config
.Addrs
.udp_outgoing
.IsNoAddr()) {
745 icpOutgoingConn
= conn
;
746 debugs(12, DBG_IMPORTANT
, "Sending ICP messages from " << icpOutgoingConn
->local
);
751 * icpConnectionShutdown only closes the 'in' socket if it is
752 * different than the 'out' socket.
755 icpConnectionShutdown(void)
757 if (!Comm::IsConnOpen(icpIncomingConn
))
760 debugs(12, DBG_IMPORTANT
, "Stop receiving ICP on " << icpIncomingConn
->local
);
762 /** Release the 'in' socket for lazy closure.
763 * in and out sockets may be sharing one same FD.
764 * This prevents this function from executing repeatedly.
766 icpIncomingConn
= NULL
;
769 * Normally we only write to the outgoing ICP socket, but
770 * we also have a read handler there to catch messages sent
771 * to that specific interface. During shutdown, we must
772 * disable reading on the outgoing socket.
774 assert(Comm::IsConnOpen(icpOutgoingConn
));
776 Comm::SetSelect(icpOutgoingConn
->fd
, COMM_SELECT_READ
, NULL
, NULL
, 0);
782 icpConnectionShutdown();
784 if (icpOutgoingConn
!= NULL
) {
785 debugs(12, DBG_IMPORTANT
, "Stop sending ICP from " << icpOutgoingConn
->local
);
786 icpOutgoingConn
= NULL
;
791 icpCount(void *buf
, int which
, size_t len
, int delay
)
793 icp_common_t
*icp
= (icp_common_t
*) buf
;
795 if (len
< sizeof(*icp
))
799 ++statCounter
.icp
.pkts_sent
;
800 kb_incr(&statCounter
.icp
.kbytes_sent
, len
);
802 if (ICP_QUERY
== icp
->opcode
) {
803 ++statCounter
.icp
.queries_sent
;
804 kb_incr(&statCounter
.icp
.q_kbytes_sent
, len
);
806 ++statCounter
.icp
.replies_sent
;
807 kb_incr(&statCounter
.icp
.r_kbytes_sent
, len
);
808 /* this is the sent-reply service time */
809 statCounter
.icp
.replySvcTime
.count(delay
);
812 if (ICP_HIT
== icp
->opcode
)
813 ++statCounter
.icp
.hits_sent
;
814 } else if (RECV
== which
) {
815 ++statCounter
.icp
.pkts_recv
;
816 kb_incr(&statCounter
.icp
.kbytes_recv
, len
);
818 if (ICP_QUERY
== icp
->opcode
) {
819 ++statCounter
.icp
.queries_recv
;
820 kb_incr(&statCounter
.icp
.q_kbytes_recv
, len
);
822 ++statCounter
.icp
.replies_recv
;
823 kb_incr(&statCounter
.icp
.r_kbytes_recv
, len
);
824 /* statCounter.icp.querySvcTime set in clientUpdateCounters */
827 if (ICP_HIT
== icp
->opcode
)
828 ++statCounter
.icp
.hits_recv
;
832 #define N_QUERIED_KEYS 8192
833 #define N_QUERIED_KEYS_MASK 8191
834 static cache_key queried_keys
[N_QUERIED_KEYS
][SQUID_MD5_DIGEST_LENGTH
];
837 icpSetCacheKey(const cache_key
* key
)
839 static int reqnum
= 0;
844 storeKeyCopy(queried_keys
[reqnum
& N_QUERIED_KEYS_MASK
], key
);
850 icpGetCacheKey(const char *url
, int reqnum
)
852 if (neighbors_do_private_keys
&& reqnum
)
853 return queried_keys
[reqnum
& N_QUERIED_KEYS_MASK
];
855 return storeKeyPublic(url
, METHOD_GET
);