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30a4f2a8 | 1 | /* |
30a4f2a8 | 2 | * DEBUG: section 15 Neighbor Routines |
3 | * AUTHOR: Harvest Derived | |
4 | * | |
2b6662ba | 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 6 | * ---------------------------------------------------------- |
30a4f2a8 | 7 | * |
2b6662ba | 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. | |
30a4f2a8 | 16 | * |
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. | |
26ac0430 | 21 | * |
30a4f2a8 | 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. | |
26ac0430 | 26 | * |
30a4f2a8 | 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 | |
cbdec147 | 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 30 | * |
019dd986 | 31 | */ |
090089c4 | 32 | |
582c2af2 | 33 | #include "squid.h" |
c0941a6a | 34 | #include "acl/FilledChecklist.h" |
65d448bc | 35 | #include "anyp/PortCfg.h" |
b814e8d4 | 36 | #include "CacheDigest.h" |
a011edee | 37 | #include "CachePeer.h" |
b802d2cb | 38 | #include "CachePeerDomainList.h" |
55cbb02b | 39 | #include "comm/Connection.h" |
aed188fd | 40 | #include "comm/ConnOpener.h" |
a553a5a3 | 41 | #include "event.h" |
eb13c21e | 42 | #include "FwdState.h" |
582c2af2 | 43 | #include "globals.h" |
aa839030 | 44 | #include "htcp.h" |
528b2c61 | 45 | #include "HttpRequest.h" |
582c2af2 | 46 | #include "icmp/net_db.h" |
aa839030 | 47 | #include "ICP.h" |
f9b6ff6e | 48 | #include "int.h" |
582c2af2 | 49 | #include "ip/Address.h" |
b283ea3f | 50 | #include "ip/tools.h" |
714e68b7 | 51 | #include "ipcache.h" |
528b2c61 | 52 | #include "MemObject.h" |
582c2af2 | 53 | #include "mgr/Registration.h" |
afabcc13 | 54 | #include "multicast.h" |
f0ba2534 | 55 | #include "neighbors.h" |
602d9612 | 56 | #include "NeighborTypeDomainList.h" |
e8dca475 | 57 | #include "pconn.h" |
aa839030 | 58 | #include "PeerDigest.h" |
e8dca475 | 59 | #include "PeerPoolMgr.h" |
b24880fe | 60 | #include "PeerSelectState.h" |
f206b652 | 61 | #include "RequestFlags.h" |
4d5904f7 | 62 | #include "SquidConfig.h" |
a98bcbee | 63 | #include "SquidMath.h" |
985c86bc | 64 | #include "SquidTime.h" |
6ea5959e | 65 | #include "stat.h" |
aa839030 | 66 | #include "Store.h" |
fb548aaf | 67 | #include "store_key_md5.h" |
8d03bdb4 | 68 | #include "tools.h" |
b1bd952a | 69 | #include "URL.h" |
090089c4 | 70 | |
429fdbec | 71 | /* count mcast group peers every 15 minutes */ |
72 | #define MCAST_COUNT_RATE 900 | |
73 | ||
a3c6762c FC |
74 | bool peerAllowedToUse(const CachePeer *, HttpRequest *); |
75 | static int peerWouldBePinged(const CachePeer *, HttpRequest *); | |
76 | static void neighborRemove(CachePeer *); | |
77 | static void neighborAlive(CachePeer *, const MemObject *, const icp_common_t *); | |
399cabec | 78 | #if USE_HTCP |
fad2588a | 79 | static void neighborAliveHtcp(CachePeer *, const MemObject *, const HtcpReplyData *); |
399cabec | 80 | #endif |
a3c6762c | 81 | static void neighborCountIgnored(CachePeer *); |
f5b8bbc4 | 82 | static void peerRefreshDNS(void *); |
b69f7771 | 83 | static IPH peerDNSConfigure; |
a3c6762c | 84 | static bool peerProbeConnect(CachePeer *); |
eb406bb7 | 85 | static CNCB peerProbeConnectDone; |
f5b8bbc4 | 86 | static void peerCountMcastPeersDone(void *data); |
87 | static void peerCountMcastPeersStart(void *data); | |
a3c6762c | 88 | static void peerCountMcastPeersSchedule(CachePeer * p, time_t when); |
b3264694 | 89 | static IRCB peerCountHandleIcpReply; |
62e76326 | 90 | |
b7ac5457 | 91 | static void neighborIgnoreNonPeer(const Ip::Address &, icp_opcode); |
ed7f5615 | 92 | static OBJH neighborDumpPeers; |
93 | static OBJH neighborDumpNonPeers; | |
a3c6762c | 94 | static void dump_peers(StoreEntry * sentry, CachePeer * peers); |
090089c4 | 95 | |
f45dd259 | 96 | static unsigned short echo_port; |
30a4f2a8 | 97 | |
c7a3724d | 98 | static int NLateReplies = 0; |
a3c6762c | 99 | static CachePeer *first_ping = NULL; |
28070024 | 100 | |
a2c963ae | 101 | const char * |
a3c6762c | 102 | neighborTypeStr(const CachePeer * p) |
69a71bd7 | 103 | { |
e102ebda | 104 | if (p->type == PEER_NONE) |
62e76326 | 105 | return "Non-Peer"; |
106 | ||
b69f7771 | 107 | if (p->type == PEER_SIBLING) |
62e76326 | 108 | return "Sibling"; |
109 | ||
b69f7771 | 110 | if (p->type == PEER_MULTICAST) |
62e76326 | 111 | return "Multicast Group"; |
112 | ||
69a71bd7 | 113 | return "Parent"; |
114 | } | |
115 | ||
a3c6762c | 116 | CachePeer * |
b7ac5457 | 117 | whichPeer(const Ip::Address &from) |
090089c4 | 118 | { |
22e4fa85 | 119 | int j; |
62e76326 | 120 | |
a3c6762c | 121 | CachePeer *p = NULL; |
cc192b50 | 122 | debugs(15, 3, "whichPeer: from " << from); |
62e76326 | 123 | |
26ac0430 | 124 | for (p = Config.peers; p; p = p->next) { |
5db6bf73 | 125 | for (j = 0; j < p->n_addresses; ++j) { |
4dd643d5 | 126 | if (from == p->addresses[j] && from.port() == p->icp.port) { |
62e76326 | 127 | return p; |
128 | } | |
129 | } | |
090089c4 | 130 | } |
62e76326 | 131 | |
4eda6afe | 132 | return NULL; |
090089c4 | 133 | } |
134 | ||
701a8572 | 135 | peer_t |
a3c6762c | 136 | neighborType(const CachePeer * p, const HttpRequest * request) |
24a1003d | 137 | { |
62e76326 | 138 | |
5844d003 | 139 | const NeighborTypeDomainList *d = NULL; |
62e76326 | 140 | |
b69f7771 | 141 | for (d = p->typelist; d; d = d->next) { |
cc192b50 | 142 | if (0 == matchDomainName(request->GetHost(), d->domain)) |
62e76326 | 143 | if (d->type != PEER_NONE) |
144 | return d->type; | |
24a1003d | 145 | } |
8a368316 AJ |
146 | #if PEER_MULTICAST_SIBLINGS |
147 | if (p->type == PEER_MULTICAST) | |
148 | if (p->options.mcast_siblings) | |
149 | return PEER_SIBLING; | |
150 | #endif | |
62e76326 | 151 | |
b69f7771 | 152 | return p->type; |
24a1003d | 153 | } |
154 | ||
2efeb0b7 AJ |
155 | /** |
156 | * \return Whether it is appropriate to fetch REQUEST from PEER. | |
7b3bd12c | 157 | */ |
2efeb0b7 | 158 | bool |
a3c6762c | 159 | peerAllowedToUse(const CachePeer * p, HttpRequest * request) |
090089c4 | 160 | { |
62e76326 | 161 | |
b802d2cb | 162 | const CachePeerDomainList *d = NULL; |
ce66013b | 163 | assert(request != NULL); |
62e76326 | 164 | |
9689d97c | 165 | if (neighborType(p, request) == PEER_SIBLING) { |
8a368316 AJ |
166 | #if PEER_MULTICAST_SIBLINGS |
167 | if (p->type == PEER_MULTICAST && p->options.mcast_siblings && | |
450fe1cb | 168 | (request->flags.noCache || request->flags.refresh || request->flags.loopDetected || request->flags.needValidation)) |
11992b6f | 169 | debugs(15, 2, "peerAllowedToUse(" << p->name << ", " << request->GetHost() << ") : multicast-siblings optimization match"); |
8a368316 | 170 | #endif |
450fe1cb | 171 | if (request->flags.noCache) |
2efeb0b7 | 172 | return false; |
62e76326 | 173 | |
45e5102d | 174 | if (request->flags.refresh) |
2efeb0b7 | 175 | return false; |
62e76326 | 176 | |
450fe1cb | 177 | if (request->flags.loopDetected) |
2efeb0b7 | 178 | return false; |
62e76326 | 179 | |
450fe1cb | 180 | if (request->flags.needValidation) |
2efeb0b7 | 181 | return false; |
9689d97c | 182 | } |
62e76326 | 183 | |
ad46590b | 184 | // CONNECT requests are proxy requests. Not to be forwarded to origin servers. |
a3c6762c | 185 | // Unless the destination port matches, in which case we MAY perform a 'DIRECT' to this CachePeer. |
4dd643d5 | 186 | if (p->options.originserver && request->method == Http::METHOD_CONNECT && request->port != p->in_addr.port()) |
2efeb0b7 | 187 | return false; |
ad46590b | 188 | |
b6a2f15e | 189 | if (p->peer_domain == NULL && p->access == NULL) |
2efeb0b7 | 190 | return true; |
62e76326 | 191 | |
2efeb0b7 | 192 | bool do_ping = false; |
b6a2f15e | 193 | for (d = p->peer_domain; d; d = d->next) { |
cc192b50 | 194 | if (0 == matchDomainName(request->GetHost(), d->domain)) { |
62e76326 | 195 | do_ping = d->do_ping; |
196 | break; | |
197 | } | |
198 | ||
199 | do_ping = !d->do_ping; | |
30a4f2a8 | 200 | } |
62e76326 | 201 | |
2efeb0b7 AJ |
202 | if (p->peer_domain && !do_ping) |
203 | return false; | |
62e76326 | 204 | |
505e35db | 205 | if (p->access == NULL) |
62e76326 | 206 | return do_ping; |
207 | ||
c0941a6a | 208 | ACLFilledChecklist checklist(p->access, request, NULL); |
62e76326 | 209 | |
2efeb0b7 | 210 | return (checklist.fastCheck() == ACCESS_ALLOWED); |
090089c4 | 211 | } |
212 | ||
a3c6762c | 213 | /* Return TRUE if it is okay to send an ICP request to this CachePeer. */ |
62fd6124 | 214 | static int |
a3c6762c | 215 | peerWouldBePinged(const CachePeer * p, HttpRequest * request) |
62fd6124 | 216 | { |
6315602c | 217 | if (p->icp.port == 0) |
62e76326 | 218 | return 0; |
219 | ||
cd196bc8 | 220 | if (p->options.no_query) |
62e76326 | 221 | return 0; |
222 | ||
cd196bc8 | 223 | if (p->options.mcast_responder) |
62e76326 | 224 | return 0; |
225 | ||
83b381d5 | 226 | if (p->n_addresses == 0) |
62e76326 | 227 | return 0; |
228 | ||
6315602c | 229 | if (p->options.background_ping && (squid_curtime - p->stats.last_query < Config.backgroundPingRate)) |
62e76326 | 230 | return 0; |
231 | ||
62fd6124 | 232 | /* the case below seems strange, but can happen if the |
233 | * URL host is on the other side of a firewall */ | |
b69f7771 | 234 | if (p->type == PEER_SIBLING) |
45e5102d | 235 | if (!request->flags.hierarchical) |
62e76326 | 236 | return 0; |
237 | ||
6315602c JGD |
238 | if (!peerAllowedToUse(p, request)) |
239 | return 0; | |
240 | ||
83b381d5 | 241 | /* Ping dead peers every timeout interval */ |
242 | if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) | |
62e76326 | 243 | return 1; |
244 | ||
5537c535 | 245 | if (!neighborUp(p)) |
246 | return 0; | |
62e76326 | 247 | |
62fd6124 | 248 | return 1; |
249 | } | |
250 | ||
e8dca475 CT |
251 | bool |
252 | peerCanOpenMore(const CachePeer *p) | |
253 | { | |
254 | const int effectiveLimit = p->max_conn <= 0 ? Squid_MaxFD : p->max_conn; | |
255 | const int remaining = effectiveLimit - p->stats.conn_open; | |
256 | debugs(15, 7, remaining << '=' << effectiveLimit << '-' << p->stats.conn_open); | |
257 | return remaining > 0; | |
258 | } | |
259 | ||
260 | bool | |
261 | peerHasConnAvailable(const CachePeer *p) | |
262 | { | |
263 | // Standby connections can be used without opening new connections. | |
264 | const int standbys = p->standby.pool ? p->standby.pool->count() : 0; | |
265 | ||
266 | // XXX: Some idle pconns can be used without opening new connections. | |
267 | // Complication: Idle pconns cannot be reused for some requests. | |
268 | const int usableIdles = 0; | |
269 | ||
270 | const int available = standbys + usableIdles; | |
271 | debugs(15, 7, available << '=' << standbys << '+' << usableIdles); | |
272 | return available > 0; | |
273 | } | |
274 | ||
275 | void | |
276 | peerConnClosed(CachePeer *p) | |
277 | { | |
278 | --p->stats.conn_open; | |
279 | if (p->standby.waitingForClose && peerCanOpenMore(p)) { | |
280 | p->standby.waitingForClose = false; | |
281 | PeerPoolMgr::Checkpoint(p->standby.mgr, "conn closed"); | |
282 | } | |
283 | } | |
284 | ||
a3c6762c | 285 | /* Return TRUE if it is okay to send an HTTP request to this CachePeer. */ |
8ff4505b | 286 | int |
a3c6762c | 287 | peerHTTPOkay(const CachePeer * p, HttpRequest * request) |
62fd6124 | 288 | { |
e8dca475 CT |
289 | if (!peerCanOpenMore(p) && !peerHasConnAvailable(p)) |
290 | return 0; | |
6315602c | 291 | |
b69f7771 | 292 | if (!peerAllowedToUse(p, request)) |
62e76326 | 293 | return 0; |
294 | ||
b69f7771 | 295 | if (!neighborUp(p)) |
62e76326 | 296 | return 0; |
297 | ||
62fd6124 | 298 | return 1; |
299 | } | |
300 | ||
3c6e634f | 301 | int |
190154cf | 302 | neighborsCount(HttpRequest * request) |
090089c4 | 303 | { |
a3c6762c | 304 | CachePeer *p = NULL; |
090089c4 | 305 | int count = 0; |
62e76326 | 306 | |
40a1495e | 307 | for (p = Config.peers; p; p = p->next) |
62e76326 | 308 | if (peerWouldBePinged(p, request)) |
5db6bf73 | 309 | ++count; |
62e76326 | 310 | |
bf8fe701 | 311 | debugs(15, 3, "neighborsCount: " << count); |
62e76326 | 312 | |
3c6e634f | 313 | return count; |
314 | } | |
090089c4 | 315 | |
a3c6762c | 316 | CachePeer * |
190154cf | 317 | getFirstUpParent(HttpRequest * request) |
090089c4 | 318 | { |
a3c6762c | 319 | CachePeer *p = NULL; |
62e76326 | 320 | |
40a1495e | 321 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 322 | if (!neighborUp(p)) |
323 | continue; | |
324 | ||
325 | if (neighborType(p, request) != PEER_PARENT) | |
326 | continue; | |
327 | ||
328 | if (!peerHTTPOkay(p, request)) | |
329 | continue; | |
330 | ||
331 | break; | |
090089c4 | 332 | } |
62e76326 | 333 | |
bf8fe701 | 334 | debugs(15, 3, "getFirstUpParent: returning " << (p ? p->host : "NULL")); |
b69f7771 | 335 | return p; |
090089c4 | 336 | } |
337 | ||
a3c6762c | 338 | CachePeer * |
190154cf | 339 | getRoundRobinParent(HttpRequest * request) |
48b38d01 | 340 | { |
a3c6762c FC |
341 | CachePeer *p; |
342 | CachePeer *q = NULL; | |
62e76326 | 343 | |
40a1495e | 344 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 345 | if (!p->options.roundrobin) |
346 | continue; | |
347 | ||
348 | if (neighborType(p, request) != PEER_PARENT) | |
349 | continue; | |
350 | ||
351 | if (!peerHTTPOkay(p, request)) | |
352 | continue; | |
353 | ||
1d0bef67 | 354 | if (p->weight == 0) |
0d5a2006 | 355 | continue; |
1d0bef67 AJ |
356 | |
357 | if (q) { | |
358 | if (p->weight == q->weight) { | |
359 | if (q->rr_count < p->rr_count) | |
360 | continue; | |
2d3d0b4e | 361 | } else if ( ((double) q->rr_count / q->weight) < ((double) p->rr_count / p->weight)) { |
1d0bef67 AJ |
362 | continue; |
363 | } | |
0d5a2006 | 364 | } |
62e76326 | 365 | |
366 | q = p; | |
48b38d01 | 367 | } |
62e76326 | 368 | |
b69f7771 | 369 | if (q) |
5db6bf73 | 370 | ++ q->rr_count; |
62e76326 | 371 | |
1d0bef67 | 372 | debugs(15, 3, HERE << "returning " << (q ? q->host : "NULL")); |
62e76326 | 373 | |
b69f7771 | 374 | return q; |
48b38d01 | 375 | } |
376 | ||
a3c6762c | 377 | CachePeer * |
190154cf | 378 | getWeightedRoundRobinParent(HttpRequest * request) |
d1b63fc8 | 379 | { |
a3c6762c FC |
380 | CachePeer *p; |
381 | CachePeer *q = NULL; | |
d1b63fc8 | 382 | int weighted_rtt; |
62e76326 | 383 | |
d1b63fc8 | 384 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 385 | if (!p->options.weighted_roundrobin) |
386 | continue; | |
387 | ||
388 | if (neighborType(p, request) != PEER_PARENT) | |
389 | continue; | |
390 | ||
391 | if (!peerHTTPOkay(p, request)) | |
392 | continue; | |
393 | ||
394 | if (q && q->rr_count < p->rr_count) | |
395 | continue; | |
396 | ||
397 | q = p; | |
d1b63fc8 | 398 | } |
62e76326 | 399 | |
d1b63fc8 | 400 | if (q && q->rr_count > 1000000) |
62e76326 | 401 | for (p = Config.peers; p; p = p->next) { |
402 | if (!p->options.weighted_roundrobin) | |
403 | continue; | |
404 | ||
405 | if (neighborType(p, request) != PEER_PARENT) | |
406 | continue; | |
407 | ||
408 | p->rr_count = 0; | |
409 | } | |
410 | ||
d1b63fc8 | 411 | if (q) { |
62e76326 | 412 | weighted_rtt = (q->stats.rtt - q->basetime) / q->weight; |
d1b63fc8 | 413 | |
62e76326 | 414 | if (weighted_rtt < 1) |
415 | weighted_rtt = 1; | |
416 | ||
417 | q->rr_count += weighted_rtt; | |
418 | ||
4a7a3d56 | 419 | debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt); |
d1b63fc8 | 420 | } |
62e76326 | 421 | |
bf8fe701 | 422 | debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q ? q->host : "NULL")); |
d1b63fc8 | 423 | return q; |
424 | } | |
425 | ||
32a47e3e AJ |
426 | /** |
427 | * This gets called every 5 minutes to clear the round-robin counter. | |
428 | * The exact timing is an arbitrary default, set on estimate timing of a | |
429 | * large number of requests in a high-performance environment during the | |
430 | * period. The larger the number of requests between cycled resets the | |
431 | * more balanced the operations. | |
432 | * | |
433 | \param data unused. | |
434 | \todo Make the reset timing a selectable parameter in squid.conf | |
435 | */ | |
26ac0430 | 436 | static void |
32a47e3e AJ |
437 | peerClearRRLoop(void *data) |
438 | { | |
439 | peerClearRR(); | |
440 | eventAdd("peerClearRR", peerClearRRLoop, data, 5 * 60.0, 0); | |
441 | } | |
442 | ||
443 | /** | |
a3c6762c | 444 | * This gets called on startup and restart to kick off the CachePeer round-robin |
32a47e3e AJ |
445 | * maintenance event. It ensures that no matter how many times its called |
446 | * no more than one event is scheduled. | |
447 | */ | |
82056f1e | 448 | void |
32a47e3e | 449 | peerClearRRStart(void) |
82056f1e | 450 | { |
7a3f0061 | 451 | static bool event_added = false; |
32a47e3e AJ |
452 | if (!event_added) { |
453 | peerClearRRLoop(NULL); | |
7a3f0061 | 454 | event_added=true; |
32a47e3e AJ |
455 | } |
456 | } | |
62e76326 | 457 | |
32a47e3e AJ |
458 | /** |
459 | * Called whenever the round-robin counters need to be reset to a sane state. | |
460 | * So far those times are: | |
d85b8894 | 461 | * - On startup and reconfigure - to set the counters to sane initial settings. |
a3c6762c | 462 | * - When a CachePeer has revived from dead, to prevent the revived CachePeer being |
32a47e3e AJ |
463 | * flooded with requests which it has 'missed' during the down period. |
464 | */ | |
465 | void | |
466 | peerClearRR() | |
467 | { | |
a3c6762c | 468 | CachePeer *p = NULL; |
32a47e3e | 469 | for (p = Config.peers; p; p = p->next) { |
2da06da0 | 470 | p->rr_count = 1; |
32a47e3e AJ |
471 | } |
472 | } | |
62e76326 | 473 | |
32a47e3e | 474 | /** |
a3c6762c | 475 | * Perform all actions when a CachePeer is detected revived. |
32a47e3e AJ |
476 | */ |
477 | void | |
a3c6762c | 478 | peerAlive(CachePeer *p) |
32a47e3e AJ |
479 | { |
480 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { | |
e0236918 | 481 | debugs(15, DBG_IMPORTANT, "Detected REVIVED " << neighborTypeStr(p) << ": " << p->name); |
32a47e3e AJ |
482 | p->stats.logged_state = PEER_ALIVE; |
483 | peerClearRR(); | |
e8dca475 CT |
484 | if (p->standby.mgr.valid()) |
485 | PeerPoolMgr::Checkpoint(p->standby.mgr, "revived peer"); | |
32a47e3e | 486 | } |
62e76326 | 487 | |
32a47e3e AJ |
488 | p->stats.last_reply = squid_curtime; |
489 | p->stats.probe_start = 0; | |
82056f1e | 490 | } |
491 | ||
a3c6762c | 492 | CachePeer * |
190154cf | 493 | getDefaultParent(HttpRequest * request) |
5269d0bd | 494 | { |
a3c6762c | 495 | CachePeer *p = NULL; |
62e76326 | 496 | |
40a1495e | 497 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 498 | if (neighborType(p, request) != PEER_PARENT) |
499 | continue; | |
500 | ||
501 | if (!p->options.default_parent) | |
502 | continue; | |
503 | ||
504 | if (!peerHTTPOkay(p, request)) | |
505 | continue; | |
506 | ||
bf8fe701 | 507 | debugs(15, 3, "getDefaultParent: returning " << p->host); |
62e76326 | 508 | |
509 | return p; | |
5269d0bd | 510 | } |
62e76326 | 511 | |
bf8fe701 | 512 | debugs(15, 3, "getDefaultParent: returning NULL"); |
5269d0bd | 513 | return NULL; |
514 | } | |
515 | ||
a3c6762c FC |
516 | CachePeer * |
517 | getNextPeer(CachePeer * p) | |
090089c4 | 518 | { |
b69f7771 | 519 | return p->next; |
090089c4 | 520 | } |
521 | ||
a3c6762c | 522 | CachePeer * |
deb79f06 | 523 | getFirstPeer(void) |
090089c4 | 524 | { |
40a1495e | 525 | return Config.peers; |
090089c4 | 526 | } |
527 | ||
b8d8561b | 528 | static void |
a3c6762c | 529 | neighborRemove(CachePeer * target) |
30a4f2a8 | 530 | { |
a3c6762c FC |
531 | CachePeer *p = NULL; |
532 | CachePeer **P = NULL; | |
40a1495e | 533 | p = Config.peers; |
534 | P = &Config.peers; | |
62e76326 | 535 | |
b69f7771 | 536 | while (p) { |
62e76326 | 537 | if (target == p) |
538 | break; | |
539 | ||
540 | P = &p->next; | |
541 | ||
542 | p = p->next; | |
b69f7771 | 543 | } |
62e76326 | 544 | |
b69f7771 | 545 | if (p) { |
62e76326 | 546 | *P = p->next; |
547 | cbdataFree(p); | |
5e263176 | 548 | --Config.npeers; |
4d64d74a | 549 | } |
62e76326 | 550 | |
40a1495e | 551 | first_ping = Config.peers; |
4d64d74a | 552 | } |
553 | ||
5f5e883f FC |
554 | static void |
555 | neighborsRegisterWithCacheManager() | |
556 | { | |
8822ebee | 557 | Mgr::RegisterAction("server_list", |
d9fc6862 A |
558 | "Peer Cache Statistics", |
559 | neighborDumpPeers, 0, 1); | |
5f5e883f | 560 | |
e0d28505 | 561 | if (Comm::IsConnOpen(icpIncomingConn)) { |
8822ebee | 562 | Mgr::RegisterAction("non_peers", |
d9fc6862 A |
563 | "List of Unknown sites sending ICP messages", |
564 | neighborDumpNonPeers, 0, 1); | |
5f5e883f FC |
565 | } |
566 | } | |
567 | ||
b8d8561b | 568 | void |
a86029b9 | 569 | neighbors_init(void) |
090089c4 | 570 | { |
30a4f2a8 | 571 | struct servent *sep = NULL; |
b263bd3f | 572 | const char *me = getMyHostname(); |
a3c6762c FC |
573 | CachePeer *thisPeer = NULL; |
574 | CachePeer *next = NULL; | |
62e76326 | 575 | |
6fdc2d18 FC |
576 | neighborsRegisterWithCacheManager(); |
577 | ||
e0d28505 | 578 | if (Comm::IsConnOpen(icpIncomingConn)) { |
62e76326 | 579 | |
580 | for (thisPeer = Config.peers; thisPeer; thisPeer = next) { | |
62e76326 | 581 | next = thisPeer->next; |
582 | ||
583 | if (0 != strcmp(thisPeer->host, me)) | |
584 | continue; | |
585 | ||
65d448bc | 586 | for (AnyP::PortCfg *s = Config.Sockaddr.http; s; s = s->next) { |
4dd643d5 | 587 | if (thisPeer->http_port != s->s.port()) |
62e76326 | 588 | continue; |
589 | ||
27774cee | 590 | debugs(15, DBG_IMPORTANT, "WARNING: Peer looks like this host"); |
bf8fe701 | 591 | |
27774cee | 592 | debugs(15, DBG_IMPORTANT, " Ignoring " << |
bf8fe701 | 593 | neighborTypeStr(thisPeer) << " " << thisPeer->host << |
594 | "/" << thisPeer->http_port << "/" << | |
595 | thisPeer->icp.port); | |
62e76326 | 596 | |
62e76326 | 597 | neighborRemove(thisPeer); |
598 | } | |
599 | } | |
b263bd3f | 600 | } |
62e76326 | 601 | |
5999b776 | 602 | peerRefreshDNS((void *) 1); |
62e76326 | 603 | |
9ca56f05 | 604 | sep = getservbyname("echo", "udp"); |
f45dd259 | 605 | echo_port = sep ? ntohs((unsigned short) sep->s_port) : 7; |
62e76326 | 606 | |
c68e4e90 | 607 | first_ping = Config.peers; |
62ee09ca | 608 | } |
609 | ||
b8d8561b | 610 | int |
190154cf | 611 | neighborsUdpPing(HttpRequest * request, |
62e76326 | 612 | StoreEntry * entry, |
613 | IRCB * callback, | |
614 | void *callback_data, | |
615 | int *exprep, | |
616 | int *timeout) | |
090089c4 | 617 | { |
3900307b | 618 | const char *url = entry->url(); |
b6c0e933 | 619 | MemObject *mem = entry->mem_obj; |
a3c6762c | 620 | CachePeer *p = NULL; |
090089c4 | 621 | int i; |
1061b406 | 622 | int reqnum = 0; |
6d2296d4 | 623 | int flags; |
9dee2904 | 624 | icp_common_t *query; |
429fdbec | 625 | int queries_sent = 0; |
0a0bf5db | 626 | int peers_pinged = 0; |
a8c926ff | 627 | int parent_timeout = 0, parent_exprep = 0; |
628 | int sibling_timeout = 0, sibling_exprep = 0; | |
1bf2cd49 | 629 | int mcast_timeout = 0, mcast_exprep = 0; |
090089c4 | 630 | |
40a1495e | 631 | if (Config.peers == NULL) |
62e76326 | 632 | return 0; |
633 | ||
9fb13bb6 | 634 | assert(entry->swap_status == SWAPOUT_NONE); |
62e76326 | 635 | |
b6c0e933 | 636 | mem->start_ping = current_time; |
62e76326 | 637 | |
b4e7f82d | 638 | mem->ping_reply_callback = callback; |
62e76326 | 639 | |
b6c0e933 | 640 | mem->ircb_data = callback_data; |
62e76326 | 641 | |
332dafa2 | 642 | reqnum = icpSetCacheKey((const cache_key *)entry->key); |
62e76326 | 643 | |
40a1495e | 644 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 645 | if (p == NULL) |
646 | p = Config.peers; | |
647 | ||
bf8fe701 | 648 | debugs(15, 5, "neighborsUdpPing: Peer " << p->host); |
62e76326 | 649 | |
650 | if (!peerWouldBePinged(p, request)) | |
a3c6762c | 651 | continue; /* next CachePeer */ |
62e76326 | 652 | |
5db6bf73 | 653 | ++peers_pinged; |
62e76326 | 654 | |
bf8fe701 | 655 | debugs(15, 4, "neighborsUdpPing: pinging peer " << p->host << " for '" << url << "'"); |
62e76326 | 656 | |
bf8fe701 | 657 | debugs(15, 3, "neighborsUdpPing: key = '" << entry->getMD5Text() << "'"); |
62e76326 | 658 | |
bf8fe701 | 659 | debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum); |
090089c4 | 660 | |
dc9d133b | 661 | #if USE_HTCP |
4f4fa815 | 662 | if (p->options.htcp && !p->options.htcp_only_clr) { |
bebf08ff AJ |
663 | if (Config.Port.htcp <= 0) { |
664 | debugs(15, DBG_CRITICAL, "HTCP is disabled! Cannot send HTCP request to peer."); | |
665 | continue; | |
666 | } | |
667 | ||
bf8fe701 | 668 | debugs(15, 3, "neighborsUdpPing: sending HTCP query"); |
65d448bc AJ |
669 | if (htcpQuery(entry, request, p) <= 0) |
670 | continue; // unable to send. | |
62e76326 | 671 | } else |
dc9d133b | 672 | #endif |
bebf08ff | 673 | { |
e0d28505 | 674 | if (Config.Port.icp <= 0 || !Comm::IsConnOpen(icpOutgoingConn)) { |
bebf08ff AJ |
675 | debugs(15, DBG_CRITICAL, "ICP is disabled! Cannot send ICP request to peer."); |
676 | continue; | |
62e76326 | 677 | } else { |
62e76326 | 678 | |
bebf08ff | 679 | if (p->type == PEER_MULTICAST) |
e0d28505 | 680 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
bebf08ff AJ |
681 | |
682 | if (p->icp.port == echo_port) { | |
683 | debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping"); | |
bebf08ff | 684 | query = _icp_common_t::createMessage(ICP_DECHO, 0, url, reqnum, 0); |
e0d28505 | 685 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
bebf08ff AJ |
686 | } else { |
687 | flags = 0; | |
62e76326 | 688 | |
bebf08ff AJ |
689 | if (Config.onoff.query_icmp) |
690 | if (p->icp.version == ICP_VERSION_2) | |
691 | flags |= ICP_FLAG_SRC_RTT; | |
62e76326 | 692 | |
bebf08ff AJ |
693 | query = _icp_common_t::createMessage(ICP_QUERY, flags, url, reqnum, 0); |
694 | ||
e0d28505 | 695 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
bebf08ff | 696 | } |
62e76326 | 697 | } |
bebf08ff | 698 | } |
62e76326 | 699 | |
5db6bf73 | 700 | ++queries_sent; |
62e76326 | 701 | |
5db6bf73 | 702 | ++ p->stats.pings_sent; |
62e76326 | 703 | |
704 | if (p->type == PEER_MULTICAST) { | |
1bf2cd49 | 705 | mcast_exprep += p->mcast.n_replies_expected; |
706 | mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected); | |
62e76326 | 707 | } else if (neighborUp(p)) { |
708 | /* its alive, expect a reply from it */ | |
709 | ||
710 | if (neighborType(p, request) == PEER_PARENT) { | |
5db6bf73 | 711 | ++parent_exprep; |
62e76326 | 712 | parent_timeout += p->stats.rtt; |
713 | } else { | |
5db6bf73 | 714 | ++sibling_exprep; |
62e76326 | 715 | sibling_timeout += p->stats.rtt; |
716 | } | |
717 | } else { | |
718 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ | |
719 | /* log it once at the threshold */ | |
720 | ||
721 | if (p->stats.logged_state == PEER_ALIVE) { | |
e0236918 | 722 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 723 | p->stats.logged_state = PEER_DEAD; |
724 | } | |
725 | } | |
726 | ||
727 | p->stats.last_query = squid_curtime; | |
728 | ||
67c8308c | 729 | /* |
a3c6762c FC |
730 | * keep probe_start == 0 for a multicast CachePeer, |
731 | * so neighborUp() never says this CachePeer is dead. | |
67c8308c | 732 | */ |
733 | ||
734 | if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0)) | |
62e76326 | 735 | p->stats.probe_start = squid_curtime; |
090089c4 | 736 | } |
62e76326 | 737 | |
40a1495e | 738 | if ((first_ping = first_ping->next) == NULL) |
62e76326 | 739 | first_ping = Config.peers; |
090089c4 | 740 | |
a8c926ff | 741 | /* |
742 | * How many replies to expect? | |
743 | */ | |
1bf2cd49 | 744 | *exprep = parent_exprep + sibling_exprep + mcast_exprep; |
a8c926ff | 745 | |
52040193 | 746 | /* |
465dc415 | 747 | * If there is a configured timeout, use it |
52040193 | 748 | */ |
465dc415 | 749 | if (Config.Timeout.icp_query) |
62e76326 | 750 | *timeout = Config.Timeout.icp_query; |
28993292 | 751 | else { |
62e76326 | 752 | if (*exprep > 0) { |
753 | if (parent_exprep) | |
754 | *timeout = 2 * parent_timeout / parent_exprep; | |
1bf2cd49 | 755 | else if (mcast_exprep) |
756 | *timeout = 2 * mcast_timeout / mcast_exprep; | |
62e76326 | 757 | else |
758 | *timeout = 2 * sibling_timeout / sibling_exprep; | |
759 | } else | |
760 | *timeout = 2000; /* 2 seconds */ | |
761 | ||
762 | if (Config.Timeout.icp_query_max) | |
763 | if (*timeout > Config.Timeout.icp_query_max) | |
764 | *timeout = Config.Timeout.icp_query_max; | |
765 | ||
766 | if (*timeout < Config.Timeout.icp_query_min) | |
767 | *timeout = Config.Timeout.icp_query_min; | |
28993292 | 768 | } |
62e76326 | 769 | |
0a0bf5db | 770 | return peers_pinged; |
090089c4 | 771 | } |
772 | ||
a3c6762c | 773 | /* lookup the digest of a given CachePeer */ |
26b164ac | 774 | lookup_t |
a3c6762c | 775 | peerDigestLookup(CachePeer * p, HttpRequest * request) |
26b164ac | 776 | { |
6cfa8966 | 777 | #if USE_CACHE_DIGESTS |
f66a9ef4 | 778 | const cache_key *key = request ? storeKeyPublicByRequest(request) : NULL; |
26b164ac | 779 | assert(p); |
0c511722 | 780 | assert(request); |
bf8fe701 | 781 | debugs(15, 5, "peerDigestLookup: peer " << p->host); |
4b4cd312 | 782 | /* does the peeer have a valid digest? */ |
62e76326 | 783 | |
e13ee7ad | 784 | if (!p->digest) { |
bf8fe701 | 785 | debugs(15, 5, "peerDigestLookup: gone!"); |
62e76326 | 786 | return LOOKUP_NONE; |
6755df2e | 787 | } else if (!peerHTTPOkay(p, request)) { |
bf8fe701 | 788 | debugs(15, 5, "peerDigestLookup: !peerHTTPOkay"); |
6755df2e | 789 | return LOOKUP_NONE; |
e13ee7ad | 790 | } else if (!p->digest->flags.needed) { |
bf8fe701 | 791 | debugs(15, 5, "peerDigestLookup: note need"); |
62e76326 | 792 | peerDigestNeeded(p->digest); |
793 | return LOOKUP_NONE; | |
4ed0e075 | 794 | } else if (!p->digest->flags.usable) { |
bf8fe701 | 795 | debugs(15, 5, "peerDigestLookup: !ready && " << (p->digest->flags.requested ? "" : "!") << "requested"); |
62e76326 | 796 | return LOOKUP_NONE; |
26b164ac | 797 | } |
62e76326 | 798 | |
bf8fe701 | 799 | debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p->host); |
e13ee7ad | 800 | assert(p->digest->cd); |
26b164ac | 801 | /* does digest predict a hit? */ |
62e76326 | 802 | |
e13ee7ad | 803 | if (!cacheDigestTest(p->digest->cd, key)) |
62e76326 | 804 | return LOOKUP_MISS; |
805 | ||
bf8fe701 | 806 | debugs(15, 5, "peerDigestLookup: peer " << p->host << " says HIT!"); |
62e76326 | 807 | |
26b164ac | 808 | return LOOKUP_HIT; |
62e76326 | 809 | |
26b164ac | 810 | #endif |
62e76326 | 811 | |
26b164ac | 812 | return LOOKUP_NONE; |
813 | } | |
814 | ||
a3c6762c FC |
815 | /* select best CachePeer based on cache digests */ |
816 | CachePeer * | |
190154cf | 817 | neighborsDigestSelect(HttpRequest * request) |
a54d3f8e | 818 | { |
a3c6762c | 819 | CachePeer *best_p = NULL; |
6cfa8966 | 820 | #if USE_CACHE_DIGESTS |
62e76326 | 821 | |
a54d3f8e | 822 | int best_rtt = 0; |
823 | int choice_count = 0; | |
824 | int ichoice_count = 0; | |
a3c6762c | 825 | CachePeer *p; |
a54d3f8e | 826 | int p_rtt; |
827 | int i; | |
62e76326 | 828 | |
45e5102d | 829 | if (!request->flags.hierarchical) |
62e76326 | 830 | return NULL; |
831 | ||
e91e2a72 | 832 | storeKeyPublicByRequest(request); |
62e76326 | 833 | |
a54d3f8e | 834 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 835 | lookup_t lookup; |
836 | ||
837 | if (!p) | |
838 | p = Config.peers; | |
839 | ||
840 | if (i == 1) | |
841 | first_ping = p; | |
842 | ||
843 | lookup = peerDigestLookup(p, request); | |
844 | ||
845 | if (lookup == LOOKUP_NONE) | |
846 | continue; | |
847 | ||
5db6bf73 | 848 | ++choice_count; |
62e76326 | 849 | |
850 | if (lookup == LOOKUP_MISS) | |
851 | continue; | |
852 | ||
853 | p_rtt = netdbHostRtt(p->host); | |
854 | ||
bf8fe701 | 855 | debugs(15, 5, "neighborsDigestSelect: peer " << p->host << " rtt: " << p_rtt); |
62e76326 | 856 | |
a3c6762c | 857 | /* is this CachePeer better than others in terms of rtt ? */ |
62e76326 | 858 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { |
859 | best_p = p; | |
860 | best_rtt = p_rtt; | |
861 | ||
862 | if (p_rtt) /* informative choice (aka educated guess) */ | |
5db6bf73 | 863 | ++ichoice_count; |
62e76326 | 864 | |
bf8fe701 | 865 | debugs(15, 4, "neighborsDigestSelect: peer " << p->host << " leads with rtt " << best_rtt); |
62e76326 | 866 | } |
a54d3f8e | 867 | } |
62e76326 | 868 | |
bf8fe701 | 869 | debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count << " (" << ichoice_count << ")"); |
26b164ac | 870 | peerNoteDigestLookup(request, best_p, |
62e76326 | 871 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); |
a54d3f8e | 872 | request->hier.n_choices = choice_count; |
873 | request->hier.n_ichoices = ichoice_count; | |
874 | #endif | |
62e76326 | 875 | |
a54d3f8e | 876 | return best_p; |
877 | } | |
878 | ||
26b164ac | 879 | void |
a3c6762c | 880 | peerNoteDigestLookup(HttpRequest * request, CachePeer * p, lookup_t lookup) |
26b164ac | 881 | { |
6cfa8966 | 882 | #if USE_CACHE_DIGESTS |
26b164ac | 883 | if (p) |
0a84e4fb | 884 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)-1); |
26b164ac | 885 | else |
62e76326 | 886 | *request->hier.cd_host = '\0'; |
887 | ||
26b164ac | 888 | request->hier.cd_lookup = lookup; |
4b981814 | 889 | debugs(15, 4, "peerNoteDigestLookup: peer " << (p? p->host : "<none>") << ", lookup: " << lookup_t_str[lookup] ); |
26b164ac | 890 | #endif |
891 | } | |
892 | ||
d73844ca | 893 | static void |
a3c6762c | 894 | neighborAlive(CachePeer * p, const MemObject * mem, const icp_common_t * header) |
4eda6afe | 895 | { |
32a47e3e | 896 | peerAlive(p); |
5db6bf73 | 897 | ++ p->stats.pings_acked; |
62e76326 | 898 | |
27cd7235 | 899 | if ((icp_opcode) header->opcode <= ICP_END) |
5db6bf73 | 900 | ++ p->icp.counts[header->opcode]; |
62e76326 | 901 | |
44f2f2e4 | 902 | p->icp.version = (int) header->version; |
903 | } | |
904 | ||
905 | static void | |
a3c6762c | 906 | neighborUpdateRtt(CachePeer * p, MemObject * mem) |
44f2f2e4 | 907 | { |
d1b63fc8 | 908 | int rtt, rtt_av_factor; |
62e76326 | 909 | |
d2cd6935 | 910 | if (!mem) |
62e76326 | 911 | return; |
912 | ||
44f2f2e4 | 913 | if (!mem->start_ping.tv_sec) |
62e76326 | 914 | return; |
915 | ||
44f2f2e4 | 916 | rtt = tvSubMsec(mem->start_ping, current_time); |
62e76326 | 917 | |
1b6ef2d2 | 918 | if (rtt < 1 || rtt > 10000) |
62e76326 | 919 | return; |
920 | ||
d1b63fc8 | 921 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 922 | |
d1b63fc8 | 923 | if (p->options.weighted_roundrobin) |
62e76326 | 924 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
925 | ||
a98bcbee | 926 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, p->stats.pings_acked, rtt_av_factor); |
4eda6afe | 927 | } |
090089c4 | 928 | |
399cabec | 929 | #if USE_HTCP |
930 | static void | |
fad2588a | 931 | neighborAliveHtcp(CachePeer * p, const MemObject * mem, const HtcpReplyData * htcp) |
399cabec | 932 | { |
32a47e3e | 933 | peerAlive(p); |
5db6bf73 FC |
934 | ++ p->stats.pings_acked; |
935 | ++ p->htcp.counts[htcp->hit ? 1 : 0]; | |
44f2f2e4 | 936 | p->htcp.version = htcp->version; |
399cabec | 937 | } |
62e76326 | 938 | |
399cabec | 939 | #endif |
940 | ||
38792624 | 941 | static void |
a3c6762c | 942 | neighborCountIgnored(CachePeer * p) |
a7e59001 | 943 | { |
b69f7771 | 944 | if (p == NULL) |
62e76326 | 945 | return; |
946 | ||
5db6bf73 | 947 | ++ p->stats.ignored_replies; |
62e76326 | 948 | |
5db6bf73 | 949 | ++NLateReplies; |
a7e59001 | 950 | } |
951 | ||
a3c6762c | 952 | static CachePeer *non_peers = NULL; |
e102ebda | 953 | |
954 | static void | |
b7ac5457 | 955 | neighborIgnoreNonPeer(const Ip::Address &from, icp_opcode opcode) |
e102ebda | 956 | { |
a3c6762c | 957 | CachePeer *np; |
62e76326 | 958 | |
26ac0430 | 959 | for (np = non_peers; np; np = np->next) { |
cc192b50 | 960 | if (np->in_addr != from) |
62e76326 | 961 | continue; |
962 | ||
4dd643d5 | 963 | if (np->in_addr.port() != from.port()) |
62e76326 | 964 | continue; |
965 | ||
966 | break; | |
e102ebda | 967 | } |
62e76326 | 968 | |
26ac0430 | 969 | if (np == NULL) { |
a3c6762c | 970 | np = (CachePeer *)xcalloc(1, sizeof(CachePeer)); |
cc192b50 | 971 | np->in_addr = from; |
4dd643d5 | 972 | np->icp.port = from.port(); |
62e76326 | 973 | np->type = PEER_NONE; |
cc192b50 | 974 | np->host = new char[MAX_IPSTRLEN]; |
4dd643d5 | 975 | from.toStr(np->host,MAX_IPSTRLEN); |
62e76326 | 976 | np->next = non_peers; |
977 | non_peers = np; | |
e102ebda | 978 | } |
62e76326 | 979 | |
5db6bf73 | 980 | ++ np->icp.counts[opcode]; |
62e76326 | 981 | |
e4cc2fdf | 982 | if (isPowTen(++np->stats.ignored_replies)) |
e0236918 | 983 | debugs(15, DBG_IMPORTANT, "WARNING: Ignored " << np->stats.ignored_replies << " replies from non-peer " << np->host); |
e102ebda | 984 | } |
985 | ||
429fdbec | 986 | /* ignoreMulticastReply |
26ac0430 | 987 | * |
d6827718 | 988 | * * We want to ignore replies from multicast peers if the |
a3c6762c | 989 | * * cache_host_domain rules would normally prevent the CachePeer |
d6827718 | 990 | * * from being used |
429fdbec | 991 | */ |
992 | static int | |
a3c6762c | 993 | ignoreMulticastReply(CachePeer * p, MemObject * mem) |
429fdbec | 994 | { |
b69f7771 | 995 | if (p == NULL) |
62e76326 | 996 | return 0; |
997 | ||
cd196bc8 | 998 | if (!p->options.mcast_responder) |
62e76326 | 999 | return 0; |
1000 | ||
b69f7771 | 1001 | if (peerHTTPOkay(p, mem->request)) |
62e76326 | 1002 | return 0; |
1003 | ||
429fdbec | 1004 | return 1; |
1005 | } | |
1006 | ||
4b981814 AJ |
1007 | /** |
1008 | * I should attach these records to the entry. We take the first | |
429fdbec | 1009 | * hit we get our wait until everyone misses. The timeout handler |
1010 | * call needs to nip this shopping list or call one of the misses. | |
26ac0430 | 1011 | * |
429fdbec | 1012 | * If a hit process is already started, then sobeit |
1013 | */ | |
b8d8561b | 1014 | void |
b7ac5457 | 1015 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const Ip::Address &from) |
090089c4 | 1016 | { |
a3c6762c | 1017 | CachePeer *p = NULL; |
5ad33356 | 1018 | StoreEntry *entry; |
1019 | MemObject *mem = NULL; | |
b6c0e933 | 1020 | peer_t ntype = PEER_NONE; |
a7e59001 | 1021 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 1022 | |
4a7a3d56 | 1023 | debugs(15, 6, "neighborsUdpAck: opcode " << opcode << " '" << storeKeyText(key) << "'"); |
62e76326 | 1024 | |
c8f4eac4 | 1025 | if (NULL != (entry = Store::Root().get(key))) |
62e76326 | 1026 | mem = entry->mem_obj; |
1027 | ||
b69f7771 | 1028 | if ((p = whichPeer(from))) |
62e76326 | 1029 | neighborAlive(p, mem, header); |
1030 | ||
27cd7235 | 1031 | if (opcode > ICP_END) |
62e76326 | 1032 | return; |
1033 | ||
4b981814 | 1034 | const char *opcode_d = icp_opcode_str[opcode]; |
62e76326 | 1035 | |
41587298 | 1036 | if (p) |
62e76326 | 1037 | neighborUpdateRtt(p, mem); |
1038 | ||
5ad33356 | 1039 | /* Does the entry exist? */ |
26ac0430 | 1040 | if (NULL == entry) { |
bf8fe701 | 1041 | debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1042 | neighborCountIgnored(p); |
1043 | return; | |
5ad33356 | 1044 | } |
62e76326 | 1045 | |
2d1c6a4f | 1046 | /* check if someone is already fetching it */ |
26ac0430 | 1047 | if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1048 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1049 | neighborCountIgnored(p); |
1050 | return; | |
d2af9477 | 1051 | } |
62e76326 | 1052 | |
26ac0430 | 1053 | if (mem == NULL) { |
bf8fe701 | 1054 | debugs(15, 2, "Ignoring " << opcode_d << " for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1055 | neighborCountIgnored(p); |
1056 | return; | |
8de2f7ad | 1057 | } |
62e76326 | 1058 | |
26ac0430 | 1059 | if (entry->ping_status != PING_WAITING) { |
bf8fe701 | 1060 | debugs(15, 2, "neighborsUdpAck: Late " << opcode_d << " for " << storeKeyText(key)); |
62e76326 | 1061 | neighborCountIgnored(p); |
1062 | return; | |
8de2f7ad | 1063 | } |
62e76326 | 1064 | |
1bfe9ade | 1065 | if (!entry->locked()) { |
5bd484b5 | 1066 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1067 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1068 | neighborCountIgnored(p); |
1069 | return; | |
090089c4 | 1070 | } |
62e76326 | 1071 | |
bf8fe701 | 1072 | debugs(15, 3, "neighborsUdpAck: " << opcode_d << " for '" << storeKeyText(key) << "' from " << (p ? p->host : "source") << " "); |
62e76326 | 1073 | |
26ac0430 | 1074 | if (p) { |
62e76326 | 1075 | ntype = neighborType(p, mem->request); |
44f2f2e4 | 1076 | } |
62e76326 | 1077 | |
26ac0430 | 1078 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1079 | neighborCountIgnored(p); |
26ac0430 | 1080 | } else if (opcode == ICP_MISS) { |
62e76326 | 1081 | if (p == NULL) { |
1082 | neighborIgnoreNonPeer(from, opcode); | |
1083 | } else { | |
0c3d3f65 | 1084 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1085 | } |
26ac0430 | 1086 | } else if (opcode == ICP_HIT) { |
62e76326 | 1087 | if (p == NULL) { |
1088 | neighborIgnoreNonPeer(from, opcode); | |
1089 | } else { | |
1090 | header->opcode = ICP_HIT; | |
0c3d3f65 | 1091 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1092 | } |
26ac0430 | 1093 | } else if (opcode == ICP_DECHO) { |
62e76326 | 1094 | if (p == NULL) { |
1095 | neighborIgnoreNonPeer(from, opcode); | |
1096 | } else if (ntype == PEER_SIBLING) { | |
1097 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); | |
1098 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
1099 | } else { | |
0c3d3f65 | 1100 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1101 | } |
26ac0430 | 1102 | } else if (opcode == ICP_SECHO) { |
62e76326 | 1103 | if (p) { |
e0236918 | 1104 | debugs(15, DBG_IMPORTANT, "Ignoring SECHO from neighbor " << p->host); |
62e76326 | 1105 | neighborCountIgnored(p); |
62e76326 | 1106 | } else { |
e0236918 | 1107 | debugs(15, DBG_IMPORTANT, "Unsolicited SECHO from " << from); |
62e76326 | 1108 | } |
26ac0430 | 1109 | } else if (opcode == ICP_DENIED) { |
62e76326 | 1110 | if (p == NULL) { |
1111 | neighborIgnoreNonPeer(from, opcode); | |
1112 | } else if (p->stats.pings_acked > 100) { | |
1113 | if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) { | |
fa84c01d FC |
1114 | debugs(15, DBG_CRITICAL, "95%% of replies from '" << p->host << "' are UDP_DENIED"); |
1115 | debugs(15, DBG_CRITICAL, "Disabling '" << p->host << "', please check your configuration."); | |
62e76326 | 1116 | neighborRemove(p); |
1117 | p = NULL; | |
1118 | } else { | |
1119 | neighborCountIgnored(p); | |
1120 | } | |
1121 | } | |
26ac0430 | 1122 | } else if (opcode == ICP_MISS_NOFETCH) { |
0c3d3f65 | 1123 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
26ac0430 | 1124 | } else { |
fa84c01d | 1125 | debugs(15, DBG_CRITICAL, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d); |
d2af9477 | 1126 | } |
090089c4 | 1127 | } |
1128 | ||
a3c6762c | 1129 | CachePeer * |
40a1495e | 1130 | peerFindByName(const char *name) |
98ffb7e4 | 1131 | { |
a3c6762c | 1132 | CachePeer *p = NULL; |
62e76326 | 1133 | |
40a1495e | 1134 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1135 | if (!strcasecmp(name, p->name)) |
1136 | break; | |
98ffb7e4 | 1137 | } |
62e76326 | 1138 | |
b69f7771 | 1139 | return p; |
98ffb7e4 | 1140 | } |
b012353a | 1141 | |
a3c6762c | 1142 | CachePeer * |
db1cd23c | 1143 | peerFindByNameAndPort(const char *name, unsigned short port) |
1144 | { | |
a3c6762c | 1145 | CachePeer *p = NULL; |
62e76326 | 1146 | |
db1cd23c | 1147 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1148 | if (strcasecmp(name, p->name)) |
1149 | continue; | |
1150 | ||
1151 | if (port != p->http_port) | |
1152 | continue; | |
1153 | ||
1154 | break; | |
db1cd23c | 1155 | } |
62e76326 | 1156 | |
db1cd23c | 1157 | return p; |
1158 | } | |
1159 | ||
5269d0bd | 1160 | int |
a3c6762c | 1161 | neighborUp(const CachePeer * p) |
5269d0bd | 1162 | { |
eb406bb7 | 1163 | if (!p->tcp_up) { |
a3c6762c | 1164 | if (!peerProbeConnect((CachePeer *) p)) { |
cc192b50 | 1165 | debugs(15, 8, "neighborUp: DOWN (probed): " << p->host << " (" << p->in_addr << ")"); |
4ed0e075 | 1166 | return 0; |
cc192b50 | 1167 | } |
eb406bb7 | 1168 | } |
62e76326 | 1169 | |
64b8103b | 1170 | /* |
a3c6762c | 1171 | * The CachePeer can not be UP if we don't have any IP addresses |
26ac0430 | 1172 | * for it. |
64b8103b | 1173 | */ |
cc192b50 | 1174 | if (0 == p->n_addresses) { |
1175 | debugs(15, 8, "neighborUp: DOWN (no-ip): " << p->host << " (" << p->in_addr << ")"); | |
62e76326 | 1176 | return 0; |
cc192b50 | 1177 | } |
62e76326 | 1178 | |
cc192b50 | 1179 | if (p->options.no_query) { |
1180 | debugs(15, 8, "neighborUp: UP (no-query): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1181 | return 1; |
cc192b50 | 1182 | } |
67c8308c | 1183 | |
1184 | if (p->stats.probe_start != 0 && | |
cc192b50 | 1185 | squid_curtime - p->stats.probe_start > Config.Timeout.deadPeer) { |
1186 | debugs(15, 8, "neighborUp: DOWN (dead): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1187 | return 0; |
cc192b50 | 1188 | } |
67c8308c | 1189 | |
cc192b50 | 1190 | debugs(15, 8, "neighborUp: UP: " << p->host << " (" << p->in_addr << ")"); |
03b82057 | 1191 | return 1; |
5269d0bd | 1192 | } |
1193 | ||
e6e3b09b | 1194 | void |
28c60158 | 1195 | peerDestroy(void *data) |
e6e3b09b | 1196 | { |
a3c6762c | 1197 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1198 | |
b69f7771 | 1199 | if (p == NULL) |
62e76326 | 1200 | return; |
1201 | ||
b802d2cb | 1202 | CachePeerDomainList *nl = NULL; |
b115733c | 1203 | |
b802d2cb | 1204 | for (CachePeerDomainList *l = p->peer_domain; l; l = nl) { |
62e76326 | 1205 | nl = l->next; |
1206 | safe_free(l->domain); | |
b115733c | 1207 | xfree(l); |
ee4a1f5d | 1208 | } |
62e76326 | 1209 | |
b69f7771 | 1210 | safe_free(p->host); |
be753325 | 1211 | safe_free(p->name); |
1212 | safe_free(p->domain); | |
e13ee7ad | 1213 | #if USE_CACHE_DIGESTS |
62e76326 | 1214 | |
fa80a8ef | 1215 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1216 | #endif |
e6e3b09b | 1217 | } |
c7a3724d | 1218 | |
e13ee7ad | 1219 | void |
a3c6762c | 1220 | peerNoteDigestGone(CachePeer * p) |
e13ee7ad | 1221 | { |
1222 | #if USE_CACHE_DIGESTS | |
fa80a8ef | 1223 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1224 | #endif |
1225 | } | |
1226 | ||
dd4bd44e | 1227 | static void |
3ff65596 | 1228 | peerDNSConfigure(const ipcache_addrs *ia, const DnsLookupDetails &, void *data) |
dd4bd44e | 1229 | { |
e8dca475 CT |
1230 | // TODO: connections to no-longer valid IP addresses should be |
1231 | // closed when we can detect such IP addresses. | |
1232 | ||
a3c6762c | 1233 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1234 | |
dd4bd44e | 1235 | int j; |
62e76326 | 1236 | |
b69f7771 | 1237 | if (p->n_addresses == 0) { |
e0236918 | 1238 | debugs(15, DBG_IMPORTANT, "Configuring " << neighborTypeStr(p) << " " << p->host << "/" << p->http_port << "/" << p->icp.port); |
62e76326 | 1239 | |
1240 | if (p->type == PEER_MULTICAST) | |
e0236918 | 1241 | debugs(15, DBG_IMPORTANT, " Multicast TTL = " << p->mcast.ttl); |
b69f7771 | 1242 | } |
62e76326 | 1243 | |
b69f7771 | 1244 | p->n_addresses = 0; |
62e76326 | 1245 | |
dd4bd44e | 1246 | if (ia == NULL) { |
fa84c01d | 1247 | debugs(0, DBG_CRITICAL, "WARNING: DNS lookup for '" << p->host << "' failed!"); |
62e76326 | 1248 | return; |
dd4bd44e | 1249 | } |
62e76326 | 1250 | |
c04fe656 | 1251 | if ((int) ia->count < 1) { |
fa84c01d | 1252 | debugs(0, DBG_CRITICAL, "WARNING: No IP address found for '" << p->host << "'!"); |
62e76326 | 1253 | return; |
dd4bd44e | 1254 | } |
62e76326 | 1255 | |
ff9970cc | 1256 | p->tcp_up = p->connect_fail_limit; |
dc3a5177 | 1257 | |
5db6bf73 | 1258 | for (j = 0; j < (int) ia->count && j < PEER_MAX_ADDRESSES; ++j) { |
62e76326 | 1259 | p->addresses[j] = ia->in_addrs[j]; |
cc192b50 | 1260 | debugs(15, 2, "--> IP address #" << j << ": " << p->addresses[j]); |
5db6bf73 | 1261 | ++ p->n_addresses; |
dd4bd44e | 1262 | } |
62e76326 | 1263 | |
4dd643d5 | 1264 | p->in_addr.setEmpty(); |
cc192b50 | 1265 | p->in_addr = p->addresses[0]; |
4dd643d5 | 1266 | p->in_addr.port(p->icp.port); |
62e76326 | 1267 | |
b69f7771 | 1268 | if (p->type == PEER_MULTICAST) |
62e76326 | 1269 | peerCountMcastPeersSchedule(p, 10); |
1270 | ||
9b5c4a9a | 1271 | #if USE_ICMP |
e51c8197 | 1272 | if (p->type != PEER_MULTICAST && IamWorkerProcess()) |
62e76326 | 1273 | if (!p->options.no_netdb_exchange) |
1274 | eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1); | |
9b5c4a9a AJ |
1275 | #endif |
1276 | ||
e8dca475 CT |
1277 | if (p->standby.mgr.valid()) |
1278 | PeerPoolMgr::Checkpoint(p->standby.mgr, "resolved peer"); | |
dd4bd44e | 1279 | } |
1280 | ||
1281 | static void | |
51242273 | 1282 | peerRefreshDNS(void *data) |
dd4bd44e | 1283 | { |
a3c6762c | 1284 | CachePeer *p = NULL; |
62e76326 | 1285 | |
46ca5fc6 | 1286 | if (eventFind(peerRefreshDNS, NULL)) |
62e76326 | 1287 | eventDelete(peerRefreshDNS, NULL); |
1288 | ||
51242273 | 1289 | if (!data && 0 == stat5minClientRequests()) { |
62e76326 | 1290 | /* no recent client traffic, wait a bit */ |
1291 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 180.0, 1); | |
1292 | return; | |
dd4bd44e | 1293 | } |
62e76326 | 1294 | |
1f3c4622 | 1295 | for (p = Config.peers; p; p = p->next) |
62e76326 | 1296 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); |
1297 | ||
dd4bd44e | 1298 | /* Reconfigure the peers every hour */ |
52040193 | 1299 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 3600.0, 1); |
dd4bd44e | 1300 | } |
e924600d | 1301 | |
4ed0e075 | 1302 | static void |
a3c6762c | 1303 | peerConnectFailedSilent(CachePeer * p) |
eb406bb7 | 1304 | { |
1305 | p->stats.last_connect_failure = squid_curtime; | |
62e76326 | 1306 | |
eb406bb7 | 1307 | if (!p->tcp_up) { |
bf8fe701 | 1308 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << |
1309 | " dead"); | |
62e76326 | 1310 | return; |
eb406bb7 | 1311 | } |
62e76326 | 1312 | |
5e263176 | 1313 | -- p->tcp_up; |
62e76326 | 1314 | |
eb406bb7 | 1315 | if (!p->tcp_up) { |
e0236918 | 1316 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 1317 | p->stats.logged_state = PEER_DEAD; |
eb406bb7 | 1318 | } |
1319 | } | |
1320 | ||
4ed0e075 | 1321 | void |
a3c6762c | 1322 | peerConnectFailed(CachePeer *p) |
4ed0e075 | 1323 | { |
e0236918 | 1324 | debugs(15, DBG_IMPORTANT, "TCP connection to " << p->host << "/" << p->http_port << " failed"); |
4ed0e075 | 1325 | peerConnectFailedSilent(p); |
1326 | } | |
1327 | ||
eb406bb7 | 1328 | void |
a3c6762c | 1329 | peerConnectSucceded(CachePeer * p) |
eb406bb7 | 1330 | { |
1331 | if (!p->tcp_up) { | |
bf8fe701 | 1332 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << " succeded"); |
ff9970cc | 1333 | p->tcp_up = p->connect_fail_limit; // NP: so peerAlive(p) works properly. |
32a47e3e | 1334 | peerAlive(p); |
26ac0430 AJ |
1335 | if (!p->n_addresses) |
1336 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); | |
1337 | } else | |
ff9970cc | 1338 | p->tcp_up = p->connect_fail_limit; |
eb406bb7 | 1339 | } |
1340 | ||
4ed0e075 | 1341 | /* |
26ac0430 | 1342 | * peerProbeConnect will be called on dead peers by neighborUp |
4ed0e075 | 1343 | */ |
cfd66529 | 1344 | static bool |
a3c6762c | 1345 | peerProbeConnect(CachePeer * p) |
e924600d | 1346 | { |
cfd66529 AJ |
1347 | time_t ctimeout = p->connect_timeout > 0 ? p->connect_timeout : Config.Timeout.peer_connect; |
1348 | bool ret = (squid_curtime - p->stats.last_connect_failure) > (ctimeout * 10); | |
62e76326 | 1349 | |
aed188fd | 1350 | if (p->testing_now > 0) |
4ed0e075 | 1351 | return ret;/* probe already running */ |
62e76326 | 1352 | |
4ed0e075 | 1353 | if (squid_curtime - p->stats.last_connect_probe == 0) |
1354 | return ret;/* don't probe to often */ | |
62e76326 | 1355 | |
a3c6762c | 1356 | /* for each IP address of this CachePeer. find one that we can connect to and probe it. */ |
5db6bf73 | 1357 | for (int i = 0; i < p->n_addresses; ++i) { |
f9b72e0c | 1358 | Comm::ConnectionPointer conn = new Comm::Connection; |
cfd66529 | 1359 | conn->remote = p->addresses[i]; |
4dd643d5 | 1360 | conn->remote.port(p->http_port); |
06c40c46 | 1361 | conn->setPeer(p); |
cfd66529 | 1362 | getOutgoingAddress(NULL, conn); |
cc192b50 | 1363 | |
5db6bf73 | 1364 | ++ p->testing_now; |
715b5def | 1365 | |
aed188fd | 1366 | AsyncCall::Pointer call = commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone, p)); |
4accd6d8 | 1367 | Comm::ConnOpener *cs = new Comm::ConnOpener(conn, call, ctimeout); |
aed188fd | 1368 | cs->setHost(p->host); |
855150a4 | 1369 | AsyncJob::Start(cs); |
715b5def AJ |
1370 | } |
1371 | ||
eb406bb7 | 1372 | p->stats.last_connect_probe = squid_curtime; |
62e76326 | 1373 | |
4ed0e075 | 1374 | return ret; |
e924600d | 1375 | } |
1376 | ||
1377 | static void | |
f01d4b80 | 1378 | peerProbeConnectDone(const Comm::ConnectionPointer &conn, comm_err_t status, int xerrno, void *data) |
e924600d | 1379 | { |
a3c6762c | 1380 | CachePeer *p = (CachePeer*)data; |
62e76326 | 1381 | |
98829f69 | 1382 | if (status == COMM_OK) { |
62e76326 | 1383 | peerConnectSucceded(p); |
e924600d | 1384 | } else { |
4ed0e075 | 1385 | peerConnectFailedSilent(p); |
e924600d | 1386 | } |
62e76326 | 1387 | |
5e263176 | 1388 | -- p->testing_now; |
db9bf30d AJ |
1389 | conn->close(); |
1390 | // TODO: log this traffic. | |
e924600d | 1391 | } |
1392 | ||
429fdbec | 1393 | static void |
a3c6762c | 1394 | peerCountMcastPeersSchedule(CachePeer * p, time_t when) |
429fdbec | 1395 | { |
b515fc11 | 1396 | if (p->mcast.flags.count_event_pending) |
62e76326 | 1397 | return; |
1398 | ||
429fdbec | 1399 | eventAdd("peerCountMcastPeersStart", |
62e76326 | 1400 | peerCountMcastPeersStart, |
1401 | p, | |
1402 | (double) when, 1); | |
1403 | ||
ccdf4138 | 1404 | p->mcast.flags.count_event_pending = true; |
429fdbec | 1405 | } |
1406 | ||
1407 | static void | |
1408 | peerCountMcastPeersStart(void *data) | |
1409 | { | |
a3c6762c | 1410 | CachePeer *p = (CachePeer *)data; |
28c60158 | 1411 | ps_state *psstate; |
429fdbec | 1412 | StoreEntry *fake; |
1413 | MemObject *mem; | |
1414 | icp_common_t *query; | |
007b8be4 | 1415 | int reqnum; |
429fdbec | 1416 | LOCAL_ARRAY(char, url, MAX_URL); |
ce66013b | 1417 | assert(p->type == PEER_MULTICAST); |
ccdf4138 | 1418 | p->mcast.flags.count_event_pending = false; |
cc192b50 | 1419 | snprintf(url, MAX_URL, "http://"); |
4dd643d5 | 1420 | p->in_addr.toUrl(url+7, MAX_URL -8 ); |
cc192b50 | 1421 | strcat(url, "/"); |
c2a7cefd | 1422 | fake = storeCreateEntry(url, url, RequestFlags(), Http::METHOD_GET); |
c21ad0f5 | 1423 | HttpRequest *req = HttpRequest::CreateFromUrl(url); |
b24880fe | 1424 | psstate = new ps_state; |
b248c2a3 AJ |
1425 | psstate->request = req; |
1426 | HTTPMSGLOCK(psstate->request); | |
429fdbec | 1427 | psstate->entry = fake; |
1428 | psstate->callback = NULL; | |
99117d82 | 1429 | psstate->callback_data = cbdataReference(p); |
b4e7f82d | 1430 | psstate->ping.start = current_time; |
429fdbec | 1431 | mem = fake->mem_obj; |
b248c2a3 AJ |
1432 | mem->request = psstate->request; |
1433 | HTTPMSGLOCK(mem->request); | |
429fdbec | 1434 | mem->start_ping = current_time; |
b4e7f82d | 1435 | mem->ping_reply_callback = peerCountHandleIcpReply; |
429fdbec | 1436 | mem->ircb_data = psstate; |
e0d28505 | 1437 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
007b8be4 | 1438 | p->mcast.id = mem->id; |
332dafa2 | 1439 | reqnum = icpSetCacheKey((const cache_key *)fake->key); |
e6ccf245 | 1440 | query = _icp_common_t::createMessage(ICP_QUERY, 0, url, reqnum, 0); |
e0d28505 | 1441 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
429fdbec | 1442 | fake->ping_status = PING_WAITING; |
1443 | eventAdd("peerCountMcastPeersDone", | |
62e76326 | 1444 | peerCountMcastPeersDone, |
1445 | psstate, | |
99117d82 | 1446 | Config.Timeout.mcast_icp_query / 1000.0, 1); |
ccdf4138 | 1447 | p->mcast.flags.counting = true; |
429fdbec | 1448 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); |
1449 | } | |
1450 | ||
1451 | static void | |
1452 | peerCountMcastPeersDone(void *data) | |
1453 | { | |
e6ccf245 | 1454 | ps_state *psstate = (ps_state *)data; |
429fdbec | 1455 | StoreEntry *fake = psstate->entry; |
99117d82 | 1456 | |
1457 | if (cbdataReferenceValid(psstate->callback_data)) { | |
a3c6762c | 1458 | CachePeer *p = (CachePeer *)psstate->callback_data; |
ccdf4138 | 1459 | p->mcast.flags.counting = false; |
a98bcbee | 1460 | p->mcast.avg_n_members = Math::doubleAverage(p->mcast.avg_n_members, (double) psstate->ping.n_recv, ++p->mcast.n_times_counted, 10); |
e0236918 | 1461 | debugs(15, DBG_IMPORTANT, "Group " << p->host << ": " << psstate->ping.n_recv << |
bf8fe701 | 1462 | " replies, "<< std::setw(4)<< std::setprecision(2) << |
1463 | p->mcast.avg_n_members <<" average, RTT " << p->stats.rtt); | |
99117d82 | 1464 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; |
1465 | } | |
1466 | ||
1467 | cbdataReferenceDone(psstate->callback_data); | |
1468 | ||
bc52369a | 1469 | fake->abort(); // sets ENTRY_ABORTED and initiates releated cleanup |
6dd9f4bd | 1470 | HTTPMSGUNLOCK(fake->mem_obj->request); |
acc5dc4c | 1471 | fake->unlock("peerCountMcastPeersDone"); |
6dd9f4bd | 1472 | HTTPMSGUNLOCK(psstate->request); |
1a827bc0 | 1473 | cbdataFree(psstate); |
429fdbec | 1474 | } |
1475 | ||
1476 | static void | |
a3c6762c | 1477 | peerCountHandleIcpReply(CachePeer * p, peer_t type, AnyP::ProtocolType proto, void *hdrnotused, void *data) |
429fdbec | 1478 | { |
d1b63fc8 | 1479 | int rtt_av_factor; |
1480 | ||
e6ccf245 | 1481 | ps_state *psstate = (ps_state *)data; |
1a827bc0 | 1482 | StoreEntry *fake = psstate->entry; |
1483 | MemObject *mem = fake->mem_obj; | |
1484 | int rtt = tvSubMsec(mem->start_ping, current_time); | |
0c3d3f65 | 1485 | assert(proto == AnyP::PROTO_ICP); |
1a827bc0 | 1486 | assert(fake); |
1487 | assert(mem); | |
5db6bf73 | 1488 | ++ psstate->ping.n_recv; |
d1b63fc8 | 1489 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 1490 | |
d1b63fc8 | 1491 | if (p->options.weighted_roundrobin) |
62e76326 | 1492 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
1493 | ||
a98bcbee | 1494 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, rtt_av_factor); |
429fdbec | 1495 | } |
ed7f5615 | 1496 | |
1497 | static void | |
1498 | neighborDumpPeers(StoreEntry * sentry) | |
1499 | { | |
1500 | dump_peers(sentry, Config.peers); | |
1501 | } | |
1502 | ||
1503 | static void | |
1504 | neighborDumpNonPeers(StoreEntry * sentry) | |
1505 | { | |
1506 | dump_peers(sentry, non_peers); | |
1507 | } | |
1508 | ||
a369131d | 1509 | void |
a3c6762c | 1510 | dump_peer_options(StoreEntry * sentry, CachePeer * p) |
a369131d | 1511 | { |
cd196bc8 | 1512 | if (p->options.proxy_only) |
62e76326 | 1513 | storeAppendPrintf(sentry, " proxy-only"); |
1514 | ||
cd196bc8 | 1515 | if (p->options.no_query) |
62e76326 | 1516 | storeAppendPrintf(sentry, " no-query"); |
1517 | ||
d1b63fc8 | 1518 | if (p->options.background_ping) |
62e76326 | 1519 | storeAppendPrintf(sentry, " background-ping"); |
1520 | ||
cd196bc8 | 1521 | if (p->options.no_digest) |
62e76326 | 1522 | storeAppendPrintf(sentry, " no-digest"); |
1523 | ||
cd196bc8 | 1524 | if (p->options.default_parent) |
62e76326 | 1525 | storeAppendPrintf(sentry, " default"); |
1526 | ||
cd196bc8 | 1527 | if (p->options.roundrobin) |
62e76326 | 1528 | storeAppendPrintf(sentry, " round-robin"); |
1529 | ||
f7e1d9ce HN |
1530 | if (p->options.carp) |
1531 | storeAppendPrintf(sentry, " carp"); | |
354b5a2b | 1532 | |
2f1431ea | 1533 | #if USE_AUTH |
f7e1d9ce HN |
1534 | if (p->options.userhash) |
1535 | storeAppendPrintf(sentry, " userhash"); | |
354b5a2b | 1536 | #endif |
f7e1d9ce | 1537 | |
354b5a2b | 1538 | if (p->options.sourcehash) |
f7e1d9ce | 1539 | storeAppendPrintf(sentry, " sourcehash"); |
354b5a2b | 1540 | |
d1b63fc8 | 1541 | if (p->options.weighted_roundrobin) |
62e76326 | 1542 | storeAppendPrintf(sentry, " weighted-round-robin"); |
1543 | ||
cd196bc8 | 1544 | if (p->options.mcast_responder) |
62e76326 | 1545 | storeAppendPrintf(sentry, " multicast-responder"); |
1546 | ||
8a368316 AJ |
1547 | #if PEER_MULTICAST_SIBLINGS |
1548 | if (p->options.mcast_siblings) | |
1549 | storeAppendPrintf(sentry, " multicast-siblings"); | |
1550 | #endif | |
1551 | ||
678a066c | 1552 | if (p->weight != 1) |
62e76326 | 1553 | storeAppendPrintf(sentry, " weight=%d", p->weight); |
1554 | ||
cd196bc8 | 1555 | if (p->options.closest_only) |
62e76326 | 1556 | storeAppendPrintf(sentry, " closest-only"); |
1557 | ||
dc9d133b | 1558 | #if USE_HTCP |
18191440 | 1559 | if (p->options.htcp) { |
62e76326 | 1560 | storeAppendPrintf(sentry, " htcp"); |
18191440 AJ |
1561 | if (p->options.htcp_oldsquid || p->options.htcp_no_clr || p->options.htcp_no_purge_clr || p->options.htcp_only_clr) { |
1562 | int doneopts=0; | |
1563 | if (p->options.htcp_oldsquid) | |
1564 | storeAppendPrintf(sentry, "%soldsquid",(doneopts++>0?",":"=")); | |
1565 | if (p->options.htcp_no_clr) | |
1566 | storeAppendPrintf(sentry, "%sno-clr",(doneopts++>0?",":"=")); | |
1567 | if (p->options.htcp_no_purge_clr) | |
1568 | storeAppendPrintf(sentry, "%sno-purge-clr",(doneopts++>0?",":"=")); | |
1569 | if (p->options.htcp_only_clr) | |
1570 | storeAppendPrintf(sentry, "%sonly-clr",(doneopts++>0?",":"=")); | |
1571 | } | |
1572 | } | |
dc9d133b | 1573 | #endif |
62e76326 | 1574 | |
cd196bc8 | 1575 | if (p->options.no_netdb_exchange) |
62e76326 | 1576 | storeAppendPrintf(sentry, " no-netdb-exchange"); |
1577 | ||
9a0a18de | 1578 | #if USE_DELAY_POOLS |
cd196bc8 | 1579 | if (p->options.no_delay) |
62e76326 | 1580 | storeAppendPrintf(sentry, " no-delay"); |
95e36d02 | 1581 | #endif |
62e76326 | 1582 | |
c68e9c6b | 1583 | if (p->login) |
62e76326 | 1584 | storeAppendPrintf(sentry, " login=%s", p->login); |
1585 | ||
a369131d | 1586 | if (p->mcast.ttl > 0) |
62e76326 | 1587 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); |
1588 | ||
be753325 | 1589 | if (p->connect_timeout > 0) |
62e76326 | 1590 | storeAppendPrintf(sentry, " connect-timeout=%d", (int) p->connect_timeout); |
1591 | ||
ff9970cc AJ |
1592 | if (p->connect_fail_limit != PEER_TCP_MAGIC_COUNT) |
1593 | storeAppendPrintf(sentry, " connect-fail-limit=%d", p->connect_fail_limit); | |
1594 | ||
be753325 | 1595 | #if USE_CACHE_DIGESTS |
62e76326 | 1596 | |
be753325 | 1597 | if (p->digest_url) |
62e76326 | 1598 | storeAppendPrintf(sentry, " digest-url=%s", p->digest_url); |
1599 | ||
be753325 | 1600 | #endif |
62e76326 | 1601 | |
be753325 | 1602 | if (p->options.allow_miss) |
62e76326 | 1603 | storeAppendPrintf(sentry, " allow-miss"); |
1604 | ||
b0758e04 AJ |
1605 | if (p->options.no_tproxy) |
1606 | storeAppendPrintf(sentry, " no-tproxy"); | |
1607 | ||
be753325 | 1608 | if (p->max_conn > 0) |
62e76326 | 1609 | storeAppendPrintf(sentry, " max-conn=%d", p->max_conn); |
e8dca475 CT |
1610 | if (p->standby.limit > 0) |
1611 | storeAppendPrintf(sentry, " standby=%d", p->standby.limit); | |
62e76326 | 1612 | |
be753325 | 1613 | if (p->options.originserver) |
62e76326 | 1614 | storeAppendPrintf(sentry, " originserver"); |
1615 | ||
be753325 | 1616 | if (p->domain) |
62e76326 | 1617 | storeAppendPrintf(sentry, " forceddomain=%s", p->domain); |
1618 | ||
26ac0430 AJ |
1619 | if (p->connection_auth == 0) |
1620 | storeAppendPrintf(sentry, " connection-auth=off"); | |
1621 | else if (p->connection_auth == 1) | |
1622 | storeAppendPrintf(sentry, " connection-auth=on"); | |
1623 | else if (p->connection_auth == 2) | |
1624 | storeAppendPrintf(sentry, " connection-auth=auto"); | |
d67acb4e | 1625 | |
a369131d | 1626 | storeAppendPrintf(sentry, "\n"); |
1627 | } | |
1628 | ||
ed7f5615 | 1629 | static void |
a3c6762c | 1630 | dump_peers(StoreEntry * sentry, CachePeer * peers) |
ed7f5615 | 1631 | { |
a3c6762c | 1632 | CachePeer *e = NULL; |
cc192b50 | 1633 | char ntoabuf[MAX_IPSTRLEN]; |
b802d2cb | 1634 | CachePeerDomainList *d = NULL; |
ed7f5615 | 1635 | icp_opcode op; |
06e6d12a | 1636 | int i; |
62e76326 | 1637 | |
ed7f5615 | 1638 | if (peers == NULL) |
62e76326 | 1639 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); |
1640 | ||
ed7f5615 | 1641 | for (e = peers; e; e = e->next) { |
62e76326 | 1642 | assert(e->host != NULL); |
1643 | storeAppendPrintf(sentry, "\n%-11.11s: %s\n", | |
1644 | neighborTypeStr(e), | |
1645 | e->name); | |
1646 | storeAppendPrintf(sentry, "Host : %s/%d/%d\n", | |
1647 | e->host, | |
1648 | e->http_port, | |
1649 | e->icp.port); | |
1650 | storeAppendPrintf(sentry, "Flags :"); | |
1651 | dump_peer_options(sentry, e); | |
1652 | ||
5db6bf73 | 1653 | for (i = 0; i < e->n_addresses; ++i) { |
62e76326 | 1654 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, |
4dd643d5 | 1655 | e->addresses[i].toStr(ntoabuf,MAX_IPSTRLEN) ); |
62e76326 | 1656 | } |
1657 | ||
1658 | storeAppendPrintf(sentry, "Status : %s\n", | |
1659 | neighborUp(e) ? "Up" : "Down"); | |
1660 | storeAppendPrintf(sentry, "FETCHES : %d\n", e->stats.fetches); | |
1661 | storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open); | |
1662 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
1663 | ||
1664 | if (!e->options.no_query) { | |
1665 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", | |
1666 | (int) (squid_curtime - e->stats.last_query)); | |
1667 | ||
1668 | if (e->stats.last_reply > 0) | |
1669 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1670 | (int) (squid_curtime - e->stats.last_reply)); | |
1671 | else | |
1672 | storeAppendPrintf(sentry, "LAST REPLY : none received\n"); | |
1673 | ||
1674 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1675 | ||
1676 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1677 | e->stats.pings_acked, | |
a98bcbee | 1678 | Math::intPercent(e->stats.pings_acked, e->stats.pings_sent)); |
62e76326 | 1679 | } |
1680 | ||
a98bcbee | 1681 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", e->stats.ignored_replies, Math::intPercent(e->stats.ignored_replies, e->stats.pings_acked)); |
62e76326 | 1682 | |
1683 | if (!e->options.no_query) { | |
1684 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1994bb24 | 1685 | #if USE_HTCP |
62e76326 | 1686 | |
1687 | if (e->options.htcp) { | |
1688 | storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n", | |
1689 | e->htcp.counts[0], | |
a98bcbee | 1690 | Math::intPercent(e->htcp.counts[0], e->stats.pings_acked)); |
62e76326 | 1691 | storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n", |
1692 | e->htcp.counts[1], | |
a98bcbee | 1693 | Math::intPercent(e->htcp.counts[1], e->stats.pings_acked)); |
62e76326 | 1694 | } else { |
1994bb24 | 1695 | #endif |
62e76326 | 1696 | |
1697 | for (op = ICP_INVALID; op < ICP_END; ++op) { | |
1698 | if (e->icp.counts[op] == 0) | |
1699 | continue; | |
1700 | ||
1701 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1702 | icp_opcode_str[op], | |
1703 | e->icp.counts[op], | |
a98bcbee | 1704 | Math::intPercent(e->icp.counts[op], e->stats.pings_acked)); |
62e76326 | 1705 | } |
1706 | ||
1994bb24 | 1707 | #if USE_HTCP |
62e76326 | 1708 | |
1709 | } | |
1710 | ||
1994bb24 | 1711 | #endif |
62e76326 | 1712 | |
1713 | } | |
1714 | ||
1715 | if (e->stats.last_connect_failure) { | |
1716 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", | |
20efa1c2 | 1717 | Time::FormatHttpd(e->stats.last_connect_failure)); |
62e76326 | 1718 | } |
1719 | ||
1720 | if (e->peer_domain != NULL) { | |
1721 | storeAppendPrintf(sentry, "DOMAIN LIST: "); | |
1722 | ||
1723 | for (d = e->peer_domain; d; d = d->next) { | |
1724 | storeAppendPrintf(sentry, "%s%s ", | |
1725 | d->do_ping ? null_string : "!", d->domain); | |
1726 | } | |
1727 | ||
1728 | storeAppendPrintf(sentry, "\n"); | |
1729 | } | |
1730 | ||
a98bcbee | 1731 | storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", Math::intPercent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); |
ed7f5615 | 1732 | } |
1733 | } | |
86aebcda | 1734 | |
1735 | #if USE_HTCP | |
1736 | void | |
fad2588a | 1737 | neighborsHtcpReply(const cache_key * key, HtcpReplyData * htcp, const Ip::Address &from) |
86aebcda | 1738 | { |
53525d53 | 1739 | StoreEntry *e = Store::Root().get(key); |
399cabec | 1740 | MemObject *mem = NULL; |
a3c6762c | 1741 | CachePeer *p; |
399cabec | 1742 | peer_t ntype = PEER_NONE; |
26ac0430 AJ |
1743 | debugs(15, 6, "neighborsHtcpReply: " << |
1744 | (htcp->hit ? "HIT" : "MISS") << " " << | |
1745 | storeKeyText(key) ); | |
62e76326 | 1746 | |
88e13392 | 1747 | if (NULL != e) |
62e76326 | 1748 | mem = e->mem_obj; |
1749 | ||
399cabec | 1750 | if ((p = whichPeer(from))) |
62e76326 | 1751 | neighborAliveHtcp(p, mem, htcp); |
1752 | ||
399cabec | 1753 | /* Does the entry exist? */ |
26ac0430 | 1754 | if (NULL == e) { |
bf8fe701 | 1755 | debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1756 | neighborCountIgnored(p); |
1757 | return; | |
399cabec | 1758 | } |
62e76326 | 1759 | |
399cabec | 1760 | /* check if someone is already fetching it */ |
26ac0430 | 1761 | if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1762 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1763 | neighborCountIgnored(p); |
1764 | return; | |
399cabec | 1765 | } |
62e76326 | 1766 | |
26ac0430 | 1767 | if (mem == NULL) { |
bf8fe701 | 1768 | debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1769 | neighborCountIgnored(p); |
1770 | return; | |
399cabec | 1771 | } |
62e76326 | 1772 | |
26ac0430 | 1773 | if (e->ping_status != PING_WAITING) { |
bf8fe701 | 1774 | debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key) << " is not PING_WAITING"); |
62e76326 | 1775 | neighborCountIgnored(p); |
1776 | return; | |
399cabec | 1777 | } |
62e76326 | 1778 | |
1bfe9ade | 1779 | if (!e->locked()) { |
5bd484b5 | 1780 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1781 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1782 | neighborCountIgnored(p); |
1783 | return; | |
399cabec | 1784 | } |
62e76326 | 1785 | |
26ac0430 | 1786 | if (p) { |
62e76326 | 1787 | ntype = neighborType(p, mem->request); |
1788 | neighborUpdateRtt(p, mem); | |
44f2f2e4 | 1789 | } |
62e76326 | 1790 | |
26ac0430 | 1791 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1792 | neighborCountIgnored(p); |
1793 | return; | |
399cabec | 1794 | } |
62e76326 | 1795 | |
bf8fe701 | 1796 | debugs(15, 3, "neighborsHtcpReply: e = " << e); |
0c3d3f65 | 1797 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_HTCP, htcp, mem->ircb_data); |
86aebcda | 1798 | } |
62e76326 | 1799 | |
1bd06eff BR |
1800 | /* |
1801 | * Send HTCP CLR messages to all peers configured to receive them. | |
1802 | */ | |
4f4fa815 | 1803 | void |
8dceeee3 | 1804 | neighborsHtcpClear(StoreEntry * e, const char *uri, HttpRequest * req, const HttpRequestMethod &method, htcp_clr_reason reason) |
4f4fa815 | 1805 | { |
a3c6762c | 1806 | CachePeer *p; |
4f4fa815 BR |
1807 | char buf[128]; |
1808 | ||
4f4fa815 BR |
1809 | for (p = Config.peers; p; p = p->next) { |
1810 | if (!p->options.htcp) { | |
1811 | continue; | |
1812 | } | |
1813 | if (p->options.htcp_no_clr) { | |
1814 | continue; | |
1815 | } | |
1816 | if (p->options.htcp_no_purge_clr && reason == HTCP_CLR_PURGE) { | |
1817 | continue; | |
1818 | } | |
4dd643d5 | 1819 | debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p->in_addr.toUrl(buf, 128)); |
4f4fa815 BR |
1820 | htcpClear(e, uri, req, method, p, reason); |
1821 | } | |
1822 | } | |
1823 | ||
86aebcda | 1824 | #endif |