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
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11 * development; see the SPONSORS file for full details. Squid is
12 * Copyrighted (C) 2001 by the Regents of the University of
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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
41 #include "comm/Loops.h"
43 #include "comm/Connection.h"
44 #include "HttpRequest.h"
45 #include "acl/FilledChecklist.h"
47 #include "AccessLogEntry.h"
49 #include "StatCounters.h"
50 #include "SquidTime.h"
52 #include "icmp/net_db.h"
53 #include "ip/Address.h"
55 #include "ipc/StartListening.h"
59 /// dials icpIncomingConnectionOpened call
60 class IcpListeningStartedDialer
: public CallDialer
,
61 public Ipc::StartListeningCb
64 typedef void (*Handler
)(int errNo
);
65 IcpListeningStartedDialer(Handler aHandler
):
68 virtual void print(std::ostream
&os
) const { startPrint(os
) << ')'; }
69 virtual bool canDial(AsyncCall
&) const { return true; }
70 virtual void dial(AsyncCall
&) { (handler
)(errNo
); }
76 static void icpIncomingConnectionOpened(int errNo
);
78 /// \ingroup ServerProtocolICPInternal2
79 static void icpLogIcp(const Ip::Address
&, log_type
, int, const char *, int);
81 /// \ingroup ServerProtocolICPInternal2
82 static void icpHandleIcpV2(int, Ip::Address
&, char *, int);
84 /// \ingroup ServerProtocolICPInternal2
85 static void icpCount(void *, int, size_t, int);
88 \ingroup ServerProtocolICPInternal2
89 * IcpQueueHead is global so comm_incoming() knows whether or not
90 * to call icpUdpSendQueue.
92 static icpUdpData
*IcpQueueHead
= NULL
;
93 /// \ingroup ServerProtocolICPInternal2
94 static icpUdpData
*IcpQueueTail
= NULL
;
96 /// \ingroup ServerProtocolICPInternal2
97 Comm::ConnectionPointer icpIncomingConn
= NULL
;
98 /// \ingroup ServerProtocolICPInternal2
99 Comm::ConnectionPointer icpOutgoingConn
= NULL
;
102 _icp_common_t::_icp_common_t() : opcode(ICP_INVALID
), version(0), length(0), reqnum(0), flags(0), pad(0), shostid(0)
105 _icp_common_t::_icp_common_t(char *buf
, unsigned int len
)
107 if (len
< sizeof(_icp_common_t
)) {
108 /* mark as invalid */
113 memcpy(this, buf
, sizeof(icp_common_t
));
115 * Convert network order sensitive fields
117 length
= ntohs(length
);
118 reqnum
= ntohl(reqnum
);
119 flags
= ntohl(flags
);
124 _icp_common_t::getOpCode() const
126 if (opcode
> (char)ICP_END
)
129 return (icp_opcode
)opcode
;
134 ICPState::ICPState(icp_common_t
&aHeader
, HttpRequest
*aRequest
):
136 request(HTTPMSGLOCK(aRequest
)),
141 ICPState::~ICPState()
144 HTTPMSGUNLOCK(request
);
152 /// \ingroup ServerProtocolICPInternal2
153 class ICP2State
: public ICPState
, public StoreClient
157 ICP2State(icp_common_t
& aHeader
, HttpRequest
*aRequest
):
158 ICPState(aHeader
, aRequest
),rtt(0),src_rtt(0),flags(0) {}
161 void created(StoreEntry
* newEntry
);
168 ICP2State::~ICP2State()
172 ICP2State::created(StoreEntry
*newEntry
)
174 StoreEntry
*entry
= newEntry
->isNull () ? NULL
: newEntry
;
175 debugs(12, 5, "icpHandleIcpV2: OPCODE " << icp_opcode_str
[header
.opcode
]);
176 icp_opcode codeToSend
;
178 if (icpCheckUdpHit(entry
, request
)) {
179 codeToSend
= ICP_HIT
;
182 if (Config
.onoff
.test_reachability
&& rtt
== 0) {
183 if ((rtt
= netdbHostRtt(request
->GetHost())) == 0)
184 netdbPingSite(request
->GetHost());
186 #endif /* USE_ICMP */
188 if (icpGetCommonOpcode() != ICP_ERR
)
189 codeToSend
= icpGetCommonOpcode();
190 else if (Config
.onoff
.test_reachability
&& rtt
== 0)
191 codeToSend
= ICP_MISS_NOFETCH
;
193 codeToSend
= ICP_MISS
;
196 icpCreateAndSend(codeToSend
, flags
, url
, header
.reqnum
, src_rtt
, fd
, from
);
202 /// \ingroup ServerProtocolICPInternal2
204 icpLogIcp(const Ip::Address
&caddr
, log_type logcode
, int len
, const char *url
, int delay
)
208 if (LOG_TAG_NONE
== logcode
)
211 if (LOG_ICP_QUERY
== logcode
)
214 clientdbUpdate(caddr
, logcode
, AnyP::PROTO_ICP
, len
);
216 if (!Config
.onoff
.log_udp
)
219 al
.icp
.opcode
= ICP_QUERY
;
223 al
.cache
.caddr
= caddr
;
225 al
.cache
.replySize
= len
;
227 al
.cache
.code
= logcode
;
229 al
.cache
.msec
= delay
;
231 accessLogLog(&al
, NULL
);
234 /// \ingroup ServerProtocolICPInternal2
236 icpUdpSendQueue(int fd
, void *unused
)
240 while ((q
= IcpQueueHead
) != NULL
) {
241 int delay
= tvSubUsec(q
->queue_time
, current_time
);
242 /* increment delay to prevent looping */
243 const int x
= icpUdpSend(fd
, q
->address
, (icp_common_t
*) q
->msg
, q
->logcode
, ++delay
);
244 IcpQueueHead
= q
->next
;
253 _icp_common_t::createMessage(
261 icp_common_t
*headerp
= NULL
;
262 char *urloffset
= NULL
;
264 buf_len
= sizeof(icp_common_t
) + strlen(url
) + 1;
266 if (opcode
== ICP_QUERY
)
267 buf_len
+= sizeof(uint32_t);
269 buf
= (char *) xcalloc(buf_len
, 1);
271 headerp
= (icp_common_t
*) (void *) buf
;
273 headerp
->opcode
= (char) opcode
;
275 headerp
->version
= ICP_VERSION_CURRENT
;
277 headerp
->length
= (uint16_t) htons(buf_len
);
279 headerp
->reqnum
= htonl(reqnum
);
281 headerp
->flags
= htonl(flags
);
283 headerp
->pad
= htonl(pad
);
285 headerp
->shostid
= 0;
287 urloffset
= buf
+ sizeof(icp_common_t
);
289 if (opcode
== ICP_QUERY
)
290 urloffset
+= sizeof(uint32_t);
292 memcpy(urloffset
, url
, strlen(url
));
294 return (icp_common_t
*)buf
;
299 const Ip::Address
&to
,
307 len
= (int) ntohs(msg
->length
);
308 debugs(12, 5, "icpUdpSend: FD " << fd
<< " sending " <<
309 icp_opcode_str
[msg
->opcode
] << ", " << len
<< " bytes to " << to
);
311 x
= comm_udp_sendto(fd
, to
, msg
, len
);
314 /* successfully written */
315 icpLogIcp(to
, logcode
, len
, (char *) (msg
+ 1), delay
);
316 icpCount(msg
, SENT
, (size_t) len
, delay
);
318 } else if (0 == delay
) {
319 /* send failed, but queue it */
320 queue
= (icpUdpData
*) xcalloc(1, sizeof(icpUdpData
));
323 queue
->len
= (int) ntohs(msg
->length
);
324 queue
->queue_time
= current_time
;
325 queue
->logcode
= logcode
;
327 if (IcpQueueHead
== NULL
) {
328 IcpQueueHead
= queue
;
329 IcpQueueTail
= queue
;
330 } else if (IcpQueueTail
== IcpQueueHead
) {
331 IcpQueueTail
= queue
;
332 IcpQueueHead
->next
= queue
;
334 IcpQueueTail
->next
= queue
;
335 IcpQueueTail
= queue
;
338 Comm::SetSelect(fd
, COMM_SELECT_WRITE
, icpUdpSendQueue
, NULL
, 0);
339 statCounter
.icp
.replies_queued
++;
342 statCounter
.icp
.replies_dropped
++;
349 icpCheckUdpHit(StoreEntry
* e
, HttpRequest
* request
)
354 if (!e
->validToSend())
357 if (Config
.onoff
.icp_hit_stale
)
360 if (refreshCheckICP(e
, request
))
367 * This routine selects an ICP opcode for ICP misses.
369 \retval ICP_ERR no opcode selected here
370 \retval ICP_MISS_NOFETCH store is rebuilding, no fetch is possible yet
375 /* if store is rebuilding, return a UDP_MISS_NOFETCH */
377 if ((StoreController::store_dirs_rebuilding
&& opt_reload_hit_only
) ||
378 hit_only_mode_until
> squid_curtime
) {
379 return ICP_MISS_NOFETCH
;
386 icpLogFromICPCode(icp_opcode opcode
)
388 if (opcode
== ICP_ERR
)
389 return LOG_UDP_INVALID
;
391 if (opcode
== ICP_DENIED
)
392 return LOG_UDP_DENIED
;
394 if (opcode
== ICP_HIT
)
397 if (opcode
== ICP_MISS
)
400 if (opcode
== ICP_MISS_NOFETCH
)
401 return LOG_UDP_MISS_NOFETCH
;
403 fatal("expected ICP opcode\n");
405 return LOG_UDP_INVALID
;
409 icpCreateAndSend(icp_opcode opcode
, int flags
, char const *url
, int reqnum
, int pad
, int fd
, const Ip::Address
&from
)
411 icp_common_t
*reply
= _icp_common_t::createMessage(opcode
, flags
, url
, reqnum
, pad
);
412 icpUdpSend(fd
, from
, reply
, icpLogFromICPCode(opcode
), 0);
416 icpDenyAccess(Ip::Address
&from
, char *url
, int reqnum
, int fd
)
418 debugs(12, 2, "icpDenyAccess: Access Denied for " << from
<< " by " << AclMatchedName
<< ".");
420 if (clientdbCutoffDenied(from
)) {
422 * count this DENIED query in the clientdb, even though
423 * we're not sending an ICP reply...
425 clientdbUpdate(from
, LOG_UDP_DENIED
, AnyP::PROTO_ICP
, 0);
427 icpCreateAndSend(ICP_DENIED
, 0, url
, reqnum
, 0, fd
, from
);
432 icpAccessAllowed(Ip::Address
&from
, HttpRequest
* icp_request
)
434 /* absent an explicit allow, we deny all */
435 if (!Config
.accessList
.icp
)
438 ACLFilledChecklist
checklist(Config
.accessList
.icp
, icp_request
, NULL
);
439 checklist
.src_addr
= from
;
440 checklist
.my_addr
.SetNoAddr();
441 return (checklist
.fastCheck() == ACCESS_ALLOWED
);
445 icpGetUrlToSend(char *url
)
447 if (strpbrk(url
, w_space
))
448 return rfc1738_escape(url
);
454 icpGetRequest(char *url
, int reqnum
, int fd
, Ip::Address
&from
)
456 if (strpbrk(url
, w_space
)) {
457 url
= rfc1738_escape(url
);
458 icpCreateAndSend(ICP_ERR
, 0, rfc1738_escape(url
), reqnum
, 0, fd
, from
);
464 if ((result
= HttpRequest::CreateFromUrl(url
)) == NULL
)
465 icpCreateAndSend(ICP_ERR
, 0, url
, reqnum
, 0, fd
, from
);
472 doV2Query(int fd
, Ip::Address
&from
, char *buf
, icp_common_t header
)
477 /* We have a valid packet */
478 char *url
= buf
+ sizeof(icp_common_t
) + sizeof(uint32_t);
479 HttpRequest
*icp_request
= icpGetRequest(url
, header
.reqnum
, fd
, from
);
484 HTTPMSGLOCK(icp_request
);
486 if (!icpAccessAllowed(from
, icp_request
)) {
487 icpDenyAccess(from
, url
, header
.reqnum
, fd
);
488 HTTPMSGUNLOCK(icp_request
);
492 if (header
.flags
& ICP_FLAG_SRC_RTT
) {
493 rtt
= netdbHostRtt(icp_request
->GetHost());
494 int hops
= netdbHostHops(icp_request
->GetHost());
495 src_rtt
= ((hops
& 0xFFFF) << 16) | (rtt
& 0xFFFF);
498 flags
|= ICP_FLAG_SRC_RTT
;
500 #endif /* USE_ICMP */
502 /* The peer is allowed to use this cache */
503 ICP2State
*state
= new ICP2State (header
, icp_request
);
509 state
->url
= xstrdup (url
);
511 state
->flags
= flags
;
515 state
->src_rtt
= src_rtt
;
517 StoreEntry::getPublic (state
, url
, METHOD_GET
);
519 HTTPMSGUNLOCK(icp_request
);
523 _icp_common_t::handleReply(char *buf
, Ip::Address
&from
)
525 if (neighbors_do_private_keys
&& reqnum
== 0) {
526 debugs(12, 0, "icpHandleIcpV2: Neighbor " << from
<< " returned reqnum = 0");
527 debugs(12, 0, "icpHandleIcpV2: Disabling use of private keys");
528 neighbors_do_private_keys
= 0;
531 char *url
= buf
+ sizeof(icp_common_t
);
532 debugs(12, 3, "icpHandleIcpV2: " << icp_opcode_str
[opcode
] << " from " << from
<< " for '" << url
<< "'");
534 const cache_key
*key
= icpGetCacheKey(url
, (int) reqnum
);
535 /* call neighborsUdpAck even if ping_status != PING_WAITING */
536 neighborsUdpAck(key
, this, from
);
540 icpHandleIcpV2(int fd
, Ip::Address
&from
, char *buf
, int len
)
543 debugs(12, 3, "icpHandleIcpV2: ICP message is too small");
547 icp_common_t
header(buf
, len
);
549 * Length field should match the number of bytes read
552 if (len
!= header
.length
) {
553 debugs(12, 3, "icpHandleIcpV2: ICP message is too small");
557 switch (header
.opcode
) {
560 /* We have a valid packet */
561 doV2Query(fd
, from
, buf
, header
);
572 case ICP_MISS_NOFETCH
:
573 header
.handleReply(buf
, from
);
582 debugs(12, 0, "icpHandleIcpV2: UNKNOWN OPCODE: " << header
.opcode
<< " from " << from
);
590 icpPktDump(icp_common_t
* pkt
)
594 debugs(12, 9, "opcode: " << std::setw(3) << pkt
->opcode
<< " " << icp_opcode_str
[pkt
->opcode
]);
595 debugs(12, 9, "version: "<< std::left
<< std::setw(8) << pkt
->version
);
596 debugs(12, 9, "length: "<< std::left
<< std::setw(8) << ntohs(pkt
->length
));
597 debugs(12, 9, "reqnum: "<< std::left
<< std::setw(8) << ntohl(pkt
->reqnum
));
598 debugs(12, 9, "flags: "<< std::left
<< std::hex
<< std::setw(8) << ntohl(pkt
->flags
));
599 a
= (struct in_addr
)pkt
->shostid
;
600 debugs(12, 9, "shostid: " << a
);
601 debugs(12, 9, "payload: " << (char *) pkt
+ sizeof(icp_common_t
));
607 icpHandleUdp(int sock
, void *data
)
609 int *N
= &incoming_sockets_accepted
;
612 LOCAL_ARRAY(char, buf
, SQUID_UDP_SO_RCVBUF
);
615 int max
= INCOMING_ICP_MAX
;
616 Comm::SetSelect(sock
, COMM_SELECT_READ
, icpHandleUdp
, NULL
, 0);
619 len
= comm_udp_recvfrom(sock
,
621 SQUID_UDP_SO_RCVBUF
- 1,
629 if (ignoreErrno(errno
))
633 /* Some Linux systems seem to set the FD for reading and then
634 * return ECONNREFUSED when sendto() fails and generates an ICMP
635 * port unreachable message. */
636 /* or maybe an EHOSTUNREACH "No route to host" message */
637 if (errno
!= ECONNREFUSED
&& errno
!= EHOSTUNREACH
)
640 debugs(50, 1, "icpHandleUdp: FD " << sock
<< " recvfrom: " << xstrerror());
646 icpCount(buf
, RECV
, (size_t) len
, 0);
648 debugs(12, 4, "icpHandleUdp: FD " << sock
<< ": received " <<
649 (unsigned long int)len
<< " bytes from " << from
);
651 #ifdef ICP_PACKET_DUMP
656 if ((size_t) len
< sizeof(icp_common_t
)) {
657 debugs(12, 4, "icpHandleUdp: Ignoring too-small UDP packet");
661 icp_version
= (int) buf
[1]; /* cheat! */
663 if (icpOutgoingConn
->local
== from
)
664 // ignore ICP packets which loop back (multicast usually)
665 debugs(12, 4, "icpHandleUdp: Ignoring UDP packet sent by myself");
666 else if (icp_version
== ICP_VERSION_2
)
667 icpHandleIcpV2(sock
, from
, buf
, len
);
668 else if (icp_version
== ICP_VERSION_3
)
669 icpHandleIcpV3(sock
, from
, buf
, len
);
671 debugs(12, 1, "WARNING: Unused ICP version " << icp_version
<<
672 " received from " << from
);
677 icpConnectionsOpen(void)
681 if ((port
= Config
.Port
.icp
) <= 0)
684 icpIncomingConn
= new Comm::Connection
;
685 icpIncomingConn
->local
= Config
.Addrs
.udp_incoming
;
686 icpIncomingConn
->local
.SetPort(port
);
688 if (!Ip::EnableIpv6
&& !icpIncomingConn
->local
.SetIPv4()) {
689 debugs(12, DBG_CRITICAL
, "ERROR: IPv6 is disabled. " << icpIncomingConn
->local
<< " is not an IPv4 address.");
690 fatal("ICP port cannot be opened.");
692 /* split-stack for now requires default IPv4-only ICP */
693 if (Ip::EnableIpv6
&IPV6_SPECIAL_SPLITSTACK
&& icpIncomingConn
->local
.IsAnyAddr()) {
694 icpIncomingConn
->local
.SetIPv4();
697 AsyncCall::Pointer call
= asyncCall(12, 2,
698 "icpIncomingConnectionOpened",
699 IcpListeningStartedDialer(&icpIncomingConnectionOpened
));
701 Ipc::StartListening(SOCK_DGRAM
,
704 Ipc::fdnInIcpSocket
, call
);
706 if ( !Config
.Addrs
.udp_outgoing
.IsNoAddr() ) {
707 icpOutgoingConn
= new Comm::Connection
;
708 icpOutgoingConn
->local
= Config
.Addrs
.udp_outgoing
;
709 icpOutgoingConn
->local
.SetPort(port
);
711 if (!Ip::EnableIpv6
&& !icpOutgoingConn
->local
.SetIPv4()) {
712 debugs(49, DBG_CRITICAL
, "ERROR: IPv6 is disabled. " << icpOutgoingConn
->local
<< " is not an IPv4 address.");
713 fatal("ICP port cannot be opened.");
715 /* split-stack for now requires default IPv4-only ICP */
716 if (Ip::EnableIpv6
&IPV6_SPECIAL_SPLITSTACK
&& icpOutgoingConn
->local
.IsAnyAddr()) {
717 icpOutgoingConn
->local
.SetIPv4();
721 comm_open_listener(SOCK_DGRAM
, IPPROTO_UDP
, icpOutgoingConn
, "Outgoing ICP Port");
724 if (!Comm::IsConnOpen(icpOutgoingConn
))
725 fatal("Cannot open Outgoing ICP Port");
727 debugs(12, DBG_CRITICAL
, "Sending ICP messages from " << icpOutgoingConn
->local
);
729 Comm::SetSelect(icpOutgoingConn
->fd
, COMM_SELECT_READ
, icpHandleUdp
, NULL
, 0);
730 fd_note(icpOutgoingConn
->fd
, "Outgoing ICP socket");
735 icpIncomingConnectionOpened(int errNo
)
737 if (!Comm::IsConnOpen(icpIncomingConn
))
738 fatal("Cannot open ICP Port");
740 Comm::SetSelect(icpIncomingConn
->fd
, COMM_SELECT_READ
, icpHandleUdp
, NULL
, 0);
742 for (const wordlist
*s
= Config
.mcast_group_list
; s
; s
= s
->next
)
743 ipcache_nbgethostbyname(s
->key
, mcastJoinGroups
, NULL
); // XXX: pass the icpIncomingConn for mcastJoinGroups usage.
745 debugs(12, DBG_IMPORTANT
, "Accepting ICP messages on " << icpIncomingConn
->local
);
747 fd_note(icpIncomingConn
->fd
, "Incoming ICP port");
749 if (Config
.Addrs
.udp_outgoing
.IsNoAddr()) {
750 icpOutgoingConn
= icpIncomingConn
;
751 debugs(12, DBG_IMPORTANT
, "Sending ICP messages from " << icpOutgoingConn
->local
);
756 * icpConnectionShutdown only closes the 'in' socket if it is
757 * different than the 'out' socket.
760 icpConnectionShutdown(void)
762 if (!Comm::IsConnOpen(icpIncomingConn
))
765 debugs(12, DBG_IMPORTANT
, "Stop receiving ICP on " << icpIncomingConn
->local
);
767 /** Release the 'in' socket for lazy closure.
768 * in and out sockets may be sharing one same FD.
769 * This prevents this function from executing repeatedly.
771 icpIncomingConn
= NULL
;
774 * Normally we only write to the outgoing ICP socket, but
775 * we also have a read handler there to catch messages sent
776 * to that specific interface. During shutdown, we must
777 * disable reading on the outgoing socket.
779 assert(Comm::IsConnOpen(icpOutgoingConn
));
781 Comm::SetSelect(icpOutgoingConn
->fd
, COMM_SELECT_READ
, NULL
, NULL
, 0);
785 icpConnectionClose(void)
787 icpConnectionShutdown();
789 if (icpOutgoingConn
!= NULL
) {
790 debugs(12, DBG_IMPORTANT
, "Stop sending ICP from " << icpOutgoingConn
->local
);
791 icpOutgoingConn
= NULL
;
796 icpCount(void *buf
, int which
, size_t len
, int delay
)
798 icp_common_t
*icp
= (icp_common_t
*) buf
;
800 if (len
< sizeof(*icp
))
804 statCounter
.icp
.pkts_sent
++;
805 kb_incr(&statCounter
.icp
.kbytes_sent
, len
);
807 if (ICP_QUERY
== icp
->opcode
) {
808 statCounter
.icp
.queries_sent
++;
809 kb_incr(&statCounter
.icp
.q_kbytes_sent
, len
);
811 statCounter
.icp
.replies_sent
++;
812 kb_incr(&statCounter
.icp
.r_kbytes_sent
, len
);
813 /* this is the sent-reply service time */
814 statCounter
.icp
.reply_svc_time
.count(delay
);
817 if (ICP_HIT
== icp
->opcode
)
818 statCounter
.icp
.hits_sent
++;
819 } else if (RECV
== which
) {
820 statCounter
.icp
.pkts_recv
++;
821 kb_incr(&statCounter
.icp
.kbytes_recv
, len
);
823 if (ICP_QUERY
== icp
->opcode
) {
824 statCounter
.icp
.queries_recv
++;
825 kb_incr(&statCounter
.icp
.q_kbytes_recv
, len
);
827 statCounter
.icp
.replies_recv
++;
828 kb_incr(&statCounter
.icp
.r_kbytes_recv
, len
);
829 /* statCounter.icp.query_svc_time set in clientUpdateCounters */
832 if (ICP_HIT
== icp
->opcode
)
833 statCounter
.icp
.hits_recv
++;
837 #define N_QUERIED_KEYS 8192
838 #define N_QUERIED_KEYS_MASK 8191
839 static cache_key queried_keys
[N_QUERIED_KEYS
][SQUID_MD5_DIGEST_LENGTH
];
842 icpSetCacheKey(const cache_key
* key
)
844 static int reqnum
= 0;
849 storeKeyCopy(queried_keys
[reqnum
& N_QUERIED_KEYS_MASK
], key
);
855 icpGetCacheKey(const char *url
, int reqnum
)
857 if (neighbors_do_private_keys
&& reqnum
)
858 return queried_keys
[reqnum
& N_QUERIED_KEYS_MASK
];
860 return storeKeyPublic(url
, METHOD_GET
);