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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 | |
44a47c6e | 33 | #include "squid.h" |
07f765a3 | 34 | #include "ProtoPort.h" |
aa839030 | 35 | #include "ACLChecklist.h" |
a553a5a3 | 36 | #include "event.h" |
62ee09ca | 37 | #include "CacheManager.h" |
aa839030 | 38 | #include "htcp.h" |
528b2c61 | 39 | #include "HttpRequest.h" |
aa839030 | 40 | #include "ICP.h" |
528b2c61 | 41 | #include "MemObject.h" |
aa839030 | 42 | #include "PeerDigest.h" |
b24880fe | 43 | #include "PeerSelectState.h" |
985c86bc | 44 | #include "SquidTime.h" |
aa839030 | 45 | #include "Store.h" |
9b5c4a9a | 46 | #include "icmp/net_db.h" |
9837e5f0 | 47 | #include "ip/IpAddress.h" |
090089c4 | 48 | |
429fdbec | 49 | /* count mcast group peers every 15 minutes */ |
50 | #define MCAST_COUNT_RATE 900 | |
51 | ||
d67acb4e | 52 | int peerAllowedToUse(const peer *, HttpRequest *); |
190154cf | 53 | static int peerWouldBePinged(const peer *, HttpRequest *); |
f5b8bbc4 | 54 | static void neighborRemove(peer *); |
f5b8bbc4 | 55 | static void neighborAlive(peer *, const MemObject *, const icp_common_t *); |
399cabec | 56 | #if USE_HTCP |
57 | static void neighborAliveHtcp(peer *, const MemObject *, const htcpReplyData *); | |
58 | #endif | |
56b62ecc | 59 | static void neighborCountIgnored(peer *); |
f5b8bbc4 | 60 | static void peerRefreshDNS(void *); |
b69f7771 | 61 | static IPH peerDNSConfigure; |
4ed0e075 | 62 | static int peerProbeConnect(peer *); |
eb406bb7 | 63 | static CNCB peerProbeConnectDone; |
f5b8bbc4 | 64 | static void peerCountMcastPeersDone(void *data); |
65 | static void peerCountMcastPeersStart(void *data); | |
66 | static void peerCountMcastPeersSchedule(peer * p, time_t when); | |
b3264694 | 67 | static IRCB peerCountHandleIcpReply; |
62e76326 | 68 | |
ad61a2b4 | 69 | static void neighborIgnoreNonPeer(const IpAddress &, icp_opcode); |
ed7f5615 | 70 | static OBJH neighborDumpPeers; |
71 | static OBJH neighborDumpNonPeers; | |
72 | static void dump_peers(StoreEntry * sentry, peer * peers); | |
090089c4 | 73 | |
090089c4 | 74 | static icp_common_t echo_hdr; |
30a4f2a8 | 75 | static u_short echo_port; |
30a4f2a8 | 76 | |
c7a3724d | 77 | static int NLateReplies = 0; |
40a1495e | 78 | static peer *first_ping = NULL; |
28070024 | 79 | |
a2c963ae | 80 | const char * |
b69f7771 | 81 | neighborTypeStr(const peer * p) |
69a71bd7 | 82 | { |
e102ebda | 83 | if (p->type == PEER_NONE) |
62e76326 | 84 | return "Non-Peer"; |
85 | ||
b69f7771 | 86 | if (p->type == PEER_SIBLING) |
62e76326 | 87 | return "Sibling"; |
88 | ||
b69f7771 | 89 | if (p->type == PEER_MULTICAST) |
62e76326 | 90 | return "Multicast Group"; |
91 | ||
69a71bd7 | 92 | return "Parent"; |
93 | } | |
94 | ||
090089c4 | 95 | |
d9f9d78b | 96 | peer * |
ad61a2b4 | 97 | whichPeer(const IpAddress &from) |
090089c4 | 98 | { |
22e4fa85 | 99 | int j; |
62e76326 | 100 | |
b69f7771 | 101 | peer *p = NULL; |
cc192b50 | 102 | debugs(15, 3, "whichPeer: from " << from); |
62e76326 | 103 | |
26ac0430 | 104 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 105 | for (j = 0; j < p->n_addresses; j++) { |
cc192b50 | 106 | if (from == p->addresses[j] && from.GetPort() == p->icp.port) { |
62e76326 | 107 | return p; |
108 | } | |
109 | } | |
090089c4 | 110 | } |
62e76326 | 111 | |
4eda6afe | 112 | return NULL; |
090089c4 | 113 | } |
114 | ||
701a8572 | 115 | peer_t |
190154cf | 116 | neighborType(const peer * p, const HttpRequest * request) |
24a1003d | 117 | { |
62e76326 | 118 | |
b012353a | 119 | const struct _domain_type *d = NULL; |
62e76326 | 120 | |
b69f7771 | 121 | for (d = p->typelist; d; d = d->next) { |
cc192b50 | 122 | if (0 == matchDomainName(request->GetHost(), d->domain)) |
62e76326 | 123 | if (d->type != PEER_NONE) |
124 | return d->type; | |
24a1003d | 125 | } |
62e76326 | 126 | |
b69f7771 | 127 | return p->type; |
24a1003d | 128 | } |
129 | ||
7b3bd12c | 130 | /* |
62fd6124 | 131 | * peerAllowedToUse |
7b3bd12c | 132 | * |
dd4bd44e | 133 | * this function figures out if it is appropriate to fetch REQUEST |
62fd6124 | 134 | * from PEER. |
7b3bd12c | 135 | */ |
d67acb4e | 136 | int |
190154cf | 137 | peerAllowedToUse(const peer * p, HttpRequest * request) |
090089c4 | 138 | { |
62e76326 | 139 | |
b012353a | 140 | const struct _domain_ping *d = NULL; |
090089c4 | 141 | int do_ping = 1; |
ce66013b | 142 | assert(request != NULL); |
62e76326 | 143 | |
9689d97c | 144 | if (neighborType(p, request) == PEER_SIBLING) { |
62e76326 | 145 | if (request->flags.nocache) |
146 | return 0; | |
147 | ||
148 | if (request->flags.refresh) | |
149 | return 0; | |
150 | ||
151 | if (request->flags.loopdetect) | |
152 | return 0; | |
153 | ||
154 | if (request->flags.need_validation) | |
155 | return 0; | |
9689d97c | 156 | } |
62e76326 | 157 | |
b6a2f15e | 158 | if (p->peer_domain == NULL && p->access == NULL) |
62e76326 | 159 | return do_ping; |
160 | ||
090089c4 | 161 | do_ping = 0; |
62e76326 | 162 | |
b6a2f15e | 163 | for (d = p->peer_domain; d; d = d->next) { |
cc192b50 | 164 | if (0 == matchDomainName(request->GetHost(), d->domain)) { |
62e76326 | 165 | do_ping = d->do_ping; |
166 | break; | |
167 | } | |
168 | ||
169 | do_ping = !d->do_ping; | |
30a4f2a8 | 170 | } |
62e76326 | 171 | |
b6a2f15e | 172 | if (p->peer_domain && 0 == do_ping) |
62e76326 | 173 | return do_ping; |
174 | ||
505e35db | 175 | if (p->access == NULL) |
62e76326 | 176 | return do_ping; |
177 | ||
4fb35c3c | 178 | ACLChecklist checklist; |
62e76326 | 179 | |
8ae8bb05 | 180 | checklist.src_addr = request->client_addr; |
62e76326 | 181 | |
3c11d1f5 | 182 | checklist.my_addr = request->my_addr; |
62e76326 | 183 | |
6dd9f4bd | 184 | checklist.request = HTTPMSGLOCK(request); |
62e76326 | 185 | |
506768d9 | 186 | checklist.accessList = cbdataReference(p->access); |
b448c119 | 187 | |
108d65b2 | 188 | /* cbdataReferenceDone() happens in either fastCheck() or ~ACLCheckList */ |
189 | ||
4749aee5 | 190 | #if 0 && USE_IDENT |
191 | /* | |
192 | * this is currently broken because 'request->user_ident' has been | |
193 | * moved to conn->rfc931 and we don't have access to the parent | |
194 | * ConnStateData here. | |
195 | */ | |
94e7025e | 196 | if (request->user_ident[0]) |
62e76326 | 197 | xstrncpy(checklist.rfc931, request->user_ident, USER_IDENT_SZ); |
198 | ||
94e7025e | 199 | #endif |
62e76326 | 200 | |
108d65b2 | 201 | return checklist.fastCheck(); |
090089c4 | 202 | } |
203 | ||
62fd6124 | 204 | /* Return TRUE if it is okay to send an ICP request to this peer. */ |
205 | static int | |
190154cf | 206 | peerWouldBePinged(const peer * p, HttpRequest * request) |
62fd6124 | 207 | { |
b69f7771 | 208 | if (!peerAllowedToUse(p, request)) |
62e76326 | 209 | return 0; |
210 | ||
cd196bc8 | 211 | if (p->options.no_query) |
62e76326 | 212 | return 0; |
213 | ||
d1b63fc8 | 214 | if (p->options.background_ping && (squid_curtime - p->stats.last_query < Config.backgroundPingRate)) |
62e76326 | 215 | return 0; |
216 | ||
cd196bc8 | 217 | if (p->options.mcast_responder) |
62e76326 | 218 | return 0; |
219 | ||
83b381d5 | 220 | if (p->n_addresses == 0) |
62e76326 | 221 | return 0; |
222 | ||
0e614a06 | 223 | if (p->icp.port == 0) |
62e76326 | 224 | return 0; |
225 | ||
62fd6124 | 226 | /* the case below seems strange, but can happen if the |
227 | * URL host is on the other side of a firewall */ | |
b69f7771 | 228 | if (p->type == PEER_SIBLING) |
62e76326 | 229 | if (!request->flags.hierarchical) |
230 | return 0; | |
231 | ||
83b381d5 | 232 | /* Ping dead peers every timeout interval */ |
233 | if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) | |
62e76326 | 234 | return 1; |
235 | ||
5537c535 | 236 | if (!neighborUp(p)) |
237 | return 0; | |
62e76326 | 238 | |
62fd6124 | 239 | return 1; |
240 | } | |
241 | ||
242 | /* Return TRUE if it is okay to send an HTTP request to this peer. */ | |
8ff4505b | 243 | int |
190154cf | 244 | peerHTTPOkay(const peer * p, HttpRequest * request) |
62fd6124 | 245 | { |
b69f7771 | 246 | if (!peerAllowedToUse(p, request)) |
62e76326 | 247 | return 0; |
248 | ||
b69f7771 | 249 | if (!neighborUp(p)) |
62e76326 | 250 | return 0; |
251 | ||
c7f9eb6d | 252 | if (p->max_conn) |
62e76326 | 253 | if (p->stats.conn_open >= p->max_conn) |
254 | return 0; | |
255 | ||
62fd6124 | 256 | return 1; |
257 | } | |
258 | ||
3c6e634f | 259 | int |
190154cf | 260 | neighborsCount(HttpRequest * request) |
090089c4 | 261 | { |
b69f7771 | 262 | peer *p = NULL; |
090089c4 | 263 | int count = 0; |
62e76326 | 264 | |
40a1495e | 265 | for (p = Config.peers; p; p = p->next) |
62e76326 | 266 | if (peerWouldBePinged(p, request)) |
267 | count++; | |
268 | ||
bf8fe701 | 269 | debugs(15, 3, "neighborsCount: " << count); |
62e76326 | 270 | |
3c6e634f | 271 | return count; |
272 | } | |
090089c4 | 273 | |
deb79f06 | 274 | peer * |
190154cf | 275 | getFirstUpParent(HttpRequest * request) |
090089c4 | 276 | { |
b69f7771 | 277 | peer *p = NULL; |
62e76326 | 278 | |
40a1495e | 279 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 280 | if (!neighborUp(p)) |
281 | continue; | |
282 | ||
283 | if (neighborType(p, request) != PEER_PARENT) | |
284 | continue; | |
285 | ||
286 | if (!peerHTTPOkay(p, request)) | |
287 | continue; | |
288 | ||
289 | break; | |
090089c4 | 290 | } |
62e76326 | 291 | |
bf8fe701 | 292 | debugs(15, 3, "getFirstUpParent: returning " << (p ? p->host : "NULL")); |
b69f7771 | 293 | return p; |
090089c4 | 294 | } |
295 | ||
deb79f06 | 296 | peer * |
190154cf | 297 | getRoundRobinParent(HttpRequest * request) |
48b38d01 | 298 | { |
b69f7771 | 299 | peer *p; |
300 | peer *q = NULL; | |
62e76326 | 301 | |
40a1495e | 302 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 303 | if (!p->options.roundrobin) |
304 | continue; | |
305 | ||
306 | if (neighborType(p, request) != PEER_PARENT) | |
307 | continue; | |
308 | ||
309 | if (!peerHTTPOkay(p, request)) | |
310 | continue; | |
311 | ||
1d0bef67 | 312 | if (p->weight == 0) |
0d5a2006 | 313 | continue; |
1d0bef67 AJ |
314 | |
315 | if (q) { | |
316 | if (p->weight == q->weight) { | |
317 | if (q->rr_count < p->rr_count) | |
318 | continue; | |
319 | } else if ( (double) q->rr_count / q->weight < (double) p->rr_count / p->weight) { | |
320 | continue; | |
321 | } | |
0d5a2006 | 322 | } |
62e76326 | 323 | |
324 | q = p; | |
48b38d01 | 325 | } |
62e76326 | 326 | |
b69f7771 | 327 | if (q) |
62e76326 | 328 | q->rr_count++; |
329 | ||
1d0bef67 | 330 | debugs(15, 3, HERE << "returning " << (q ? q->host : "NULL")); |
62e76326 | 331 | |
b69f7771 | 332 | return q; |
48b38d01 | 333 | } |
334 | ||
d1b63fc8 | 335 | peer * |
190154cf | 336 | getWeightedRoundRobinParent(HttpRequest * request) |
d1b63fc8 | 337 | { |
338 | peer *p; | |
339 | peer *q = NULL; | |
340 | int weighted_rtt; | |
62e76326 | 341 | |
d1b63fc8 | 342 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 343 | if (!p->options.weighted_roundrobin) |
344 | continue; | |
345 | ||
346 | if (neighborType(p, request) != PEER_PARENT) | |
347 | continue; | |
348 | ||
349 | if (!peerHTTPOkay(p, request)) | |
350 | continue; | |
351 | ||
352 | if (q && q->rr_count < p->rr_count) | |
353 | continue; | |
354 | ||
355 | q = p; | |
d1b63fc8 | 356 | } |
62e76326 | 357 | |
d1b63fc8 | 358 | if (q && q->rr_count > 1000000) |
62e76326 | 359 | for (p = Config.peers; p; p = p->next) { |
360 | if (!p->options.weighted_roundrobin) | |
361 | continue; | |
362 | ||
363 | if (neighborType(p, request) != PEER_PARENT) | |
364 | continue; | |
365 | ||
366 | p->rr_count = 0; | |
367 | } | |
368 | ||
d1b63fc8 | 369 | if (q) { |
62e76326 | 370 | weighted_rtt = (q->stats.rtt - q->basetime) / q->weight; |
d1b63fc8 | 371 | |
62e76326 | 372 | if (weighted_rtt < 1) |
373 | weighted_rtt = 1; | |
374 | ||
375 | q->rr_count += weighted_rtt; | |
376 | ||
4a7a3d56 | 377 | debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt); |
d1b63fc8 | 378 | } |
62e76326 | 379 | |
bf8fe701 | 380 | debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q ? q->host : "NULL")); |
d1b63fc8 | 381 | return q; |
382 | } | |
383 | ||
32a47e3e AJ |
384 | /** |
385 | * This gets called every 5 minutes to clear the round-robin counter. | |
386 | * The exact timing is an arbitrary default, set on estimate timing of a | |
387 | * large number of requests in a high-performance environment during the | |
388 | * period. The larger the number of requests between cycled resets the | |
389 | * more balanced the operations. | |
390 | * | |
391 | \param data unused. | |
392 | \todo Make the reset timing a selectable parameter in squid.conf | |
393 | */ | |
26ac0430 | 394 | static void |
32a47e3e AJ |
395 | peerClearRRLoop(void *data) |
396 | { | |
397 | peerClearRR(); | |
398 | eventAdd("peerClearRR", peerClearRRLoop, data, 5 * 60.0, 0); | |
399 | } | |
400 | ||
401 | /** | |
402 | * This gets called on startup and restart to kick off the peer round-robin | |
403 | * maintenance event. It ensures that no matter how many times its called | |
404 | * no more than one event is scheduled. | |
405 | */ | |
82056f1e | 406 | void |
32a47e3e | 407 | peerClearRRStart(void) |
82056f1e | 408 | { |
32a47e3e AJ |
409 | static int event_added = 0; |
410 | if (!event_added) { | |
411 | peerClearRRLoop(NULL); | |
412 | } | |
413 | } | |
62e76326 | 414 | |
32a47e3e AJ |
415 | /** |
416 | * Called whenever the round-robin counters need to be reset to a sane state. | |
417 | * So far those times are: | |
418 | \item On startup and reconfigure - to set the counters to sane initial settings. | |
419 | \item When a peer has revived from dead, to prevent the revived peer being | |
420 | * flooded with requests which it has 'missed' during the down period. | |
421 | */ | |
422 | void | |
423 | peerClearRR() | |
424 | { | |
425 | peer *p = NULL; | |
426 | for (p = Config.peers; p; p = p->next) { | |
62e76326 | 427 | p->rr_count = 0; |
32a47e3e AJ |
428 | } |
429 | } | |
62e76326 | 430 | |
32a47e3e AJ |
431 | /** |
432 | * Perform all actions when a peer is detected revived. | |
433 | */ | |
434 | void | |
435 | peerAlive(peer *p) | |
436 | { | |
437 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { | |
438 | debugs(15, 1, "Detected REVIVED " << neighborTypeStr(p) << ": " << p->name); | |
439 | p->stats.logged_state = PEER_ALIVE; | |
440 | peerClearRR(); | |
441 | } | |
62e76326 | 442 | |
32a47e3e AJ |
443 | p->stats.last_reply = squid_curtime; |
444 | p->stats.probe_start = 0; | |
82056f1e | 445 | } |
446 | ||
deb79f06 | 447 | peer * |
190154cf | 448 | getDefaultParent(HttpRequest * request) |
5269d0bd | 449 | { |
b69f7771 | 450 | peer *p = NULL; |
62e76326 | 451 | |
40a1495e | 452 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 453 | if (neighborType(p, request) != PEER_PARENT) |
454 | continue; | |
455 | ||
456 | if (!p->options.default_parent) | |
457 | continue; | |
458 | ||
459 | if (!peerHTTPOkay(p, request)) | |
460 | continue; | |
461 | ||
bf8fe701 | 462 | debugs(15, 3, "getDefaultParent: returning " << p->host); |
62e76326 | 463 | |
464 | return p; | |
5269d0bd | 465 | } |
62e76326 | 466 | |
bf8fe701 | 467 | debugs(15, 3, "getDefaultParent: returning NULL"); |
5269d0bd | 468 | return NULL; |
469 | } | |
470 | ||
3c50f9bd | 471 | /* |
472 | * XXX DW thinks this function is equivalent to/redundant with | |
473 | * getFirstUpParent(). peerHTTPOkay() only returns true if the | |
26ac0430 | 474 | * peer is UP anyway, so this function would not return a |
3c50f9bd | 475 | * DOWN parent. |
476 | */ | |
6a655df0 | 477 | peer * |
190154cf | 478 | getAnyParent(HttpRequest * request) |
6a655df0 | 479 | { |
480 | peer *p = NULL; | |
62e76326 | 481 | |
6a655df0 | 482 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 483 | if (neighborType(p, request) != PEER_PARENT) |
484 | continue; | |
485 | ||
486 | if (!peerHTTPOkay(p, request)) | |
487 | continue; | |
488 | ||
bf8fe701 | 489 | debugs(15, 3, "getAnyParent: returning " << p->host); |
62e76326 | 490 | |
491 | return p; | |
6a655df0 | 492 | } |
62e76326 | 493 | |
bf8fe701 | 494 | debugs(15, 3, "getAnyParent: returning NULL"); |
6a655df0 | 495 | return NULL; |
496 | } | |
497 | ||
deb79f06 | 498 | peer * |
b69f7771 | 499 | getNextPeer(peer * p) |
090089c4 | 500 | { |
b69f7771 | 501 | return p->next; |
090089c4 | 502 | } |
503 | ||
deb79f06 | 504 | peer * |
505 | getFirstPeer(void) | |
090089c4 | 506 | { |
40a1495e | 507 | return Config.peers; |
090089c4 | 508 | } |
509 | ||
b8d8561b | 510 | static void |
deb79f06 | 511 | neighborRemove(peer * target) |
30a4f2a8 | 512 | { |
b69f7771 | 513 | peer *p = NULL; |
514 | peer **P = NULL; | |
40a1495e | 515 | p = Config.peers; |
516 | P = &Config.peers; | |
62e76326 | 517 | |
b69f7771 | 518 | while (p) { |
62e76326 | 519 | if (target == p) |
520 | break; | |
521 | ||
522 | P = &p->next; | |
523 | ||
524 | p = p->next; | |
b69f7771 | 525 | } |
62e76326 | 526 | |
b69f7771 | 527 | if (p) { |
62e76326 | 528 | *P = p->next; |
529 | cbdataFree(p); | |
530 | Config.npeers--; | |
4d64d74a | 531 | } |
62e76326 | 532 | |
40a1495e | 533 | first_ping = Config.peers; |
4d64d74a | 534 | } |
535 | ||
5f5e883f FC |
536 | static void |
537 | neighborsRegisterWithCacheManager() | |
538 | { | |
539 | CacheManager *manager = CacheManager::GetInstance(); | |
540 | manager->registerAction("server_list", | |
26ac0430 AJ |
541 | "Peer Cache Statistics", |
542 | neighborDumpPeers, 0, 1); | |
5f5e883f FC |
543 | |
544 | if (theInIcpConnection >= 0) { | |
545 | manager->registerAction("non_peers", | |
26ac0430 AJ |
546 | "List of Unknown sites sending ICP messages", |
547 | neighborDumpNonPeers, 0, 1); | |
5f5e883f FC |
548 | } |
549 | } | |
550 | ||
b8d8561b | 551 | void |
a86029b9 | 552 | neighbors_init(void) |
090089c4 | 553 | { |
ad61a2b4 | 554 | IpAddress nul; |
cc192b50 | 555 | struct addrinfo *AI = NULL; |
30a4f2a8 | 556 | struct servent *sep = NULL; |
b263bd3f | 557 | const char *me = getMyHostname(); |
cc192b50 | 558 | peer *thisPeer = NULL; |
559 | peer *next = NULL; | |
a86029b9 | 560 | int fd = theInIcpConnection; |
62e76326 | 561 | |
6fdc2d18 FC |
562 | neighborsRegisterWithCacheManager(); |
563 | ||
cc192b50 | 564 | /* setup addrinfo for use */ |
565 | nul.InitAddrInfo(AI); | |
62e76326 | 566 | |
cc192b50 | 567 | if (fd >= 0) { |
62e76326 | 568 | |
cc192b50 | 569 | if (getsockname(fd, AI->ai_addr, &AI->ai_addrlen) < 0) |
570 | debugs(15, 1, "getsockname(" << fd << "," << AI->ai_addr << "," << &AI->ai_addrlen << ") failed."); | |
62e76326 | 571 | |
572 | for (thisPeer = Config.peers; thisPeer; thisPeer = next) { | |
cc192b50 | 573 | http_port_list *s = NULL; |
62e76326 | 574 | next = thisPeer->next; |
575 | ||
576 | if (0 != strcmp(thisPeer->host, me)) | |
577 | continue; | |
578 | ||
579 | for (s = Config.Sockaddr.http; s; s = s->next) { | |
cc192b50 | 580 | if (thisPeer->http_port != s->s.GetPort()) |
62e76326 | 581 | continue; |
582 | ||
bf8fe701 | 583 | debugs(15, 1, "WARNING: Peer looks like this host"); |
584 | ||
585 | debugs(15, 1, " Ignoring " << | |
586 | neighborTypeStr(thisPeer) << " " << thisPeer->host << | |
587 | "/" << thisPeer->http_port << "/" << | |
588 | thisPeer->icp.port); | |
62e76326 | 589 | |
62e76326 | 590 | neighborRemove(thisPeer); |
591 | } | |
592 | } | |
b263bd3f | 593 | } |
62e76326 | 594 | |
5999b776 | 595 | peerRefreshDNS((void *) 1); |
62e76326 | 596 | |
e6ccf245 | 597 | if (ICP_INVALID == echo_hdr.opcode) { |
62e76326 | 598 | echo_hdr.opcode = ICP_SECHO; |
599 | echo_hdr.version = ICP_VERSION_CURRENT; | |
600 | echo_hdr.length = 0; | |
601 | echo_hdr.reqnum = 0; | |
602 | echo_hdr.flags = 0; | |
603 | echo_hdr.pad = 0; | |
cc192b50 | 604 | nul = *AI; |
605 | nul.GetInAddr( *((struct in_addr*)&echo_hdr.shostid) ); | |
62e76326 | 606 | sep = getservbyname("echo", "udp"); |
607 | echo_port = sep ? ntohs((u_short) sep->s_port) : 7; | |
090089c4 | 608 | } |
62e76326 | 609 | |
c68e4e90 | 610 | first_ping = Config.peers; |
cc192b50 | 611 | nul.FreeAddrInfo(AI); |
62ee09ca | 612 | } |
613 | ||
b8d8561b | 614 | int |
190154cf | 615 | neighborsUdpPing(HttpRequest * request, |
62e76326 | 616 | StoreEntry * entry, |
617 | IRCB * callback, | |
618 | void *callback_data, | |
619 | int *exprep, | |
620 | int *timeout) | |
090089c4 | 621 | { |
3900307b | 622 | const char *url = entry->url(); |
b6c0e933 | 623 | MemObject *mem = entry->mem_obj; |
b69f7771 | 624 | peer *p = NULL; |
090089c4 | 625 | int i; |
1061b406 | 626 | int reqnum = 0; |
6d2296d4 | 627 | int flags; |
9dee2904 | 628 | icp_common_t *query; |
429fdbec | 629 | int queries_sent = 0; |
0a0bf5db | 630 | int peers_pinged = 0; |
a8c926ff | 631 | int parent_timeout = 0, parent_exprep = 0; |
632 | int sibling_timeout = 0, sibling_exprep = 0; | |
1bf2cd49 | 633 | int mcast_timeout = 0, mcast_exprep = 0; |
090089c4 | 634 | |
40a1495e | 635 | if (Config.peers == NULL) |
62e76326 | 636 | return 0; |
637 | ||
9fb13bb6 | 638 | assert(entry->swap_status == SWAPOUT_NONE); |
62e76326 | 639 | |
b6c0e933 | 640 | mem->start_ping = current_time; |
62e76326 | 641 | |
b4e7f82d | 642 | mem->ping_reply_callback = callback; |
62e76326 | 643 | |
b6c0e933 | 644 | mem->ircb_data = callback_data; |
62e76326 | 645 | |
332dafa2 | 646 | reqnum = icpSetCacheKey((const cache_key *)entry->key); |
62e76326 | 647 | |
40a1495e | 648 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 649 | if (p == NULL) |
650 | p = Config.peers; | |
651 | ||
bf8fe701 | 652 | debugs(15, 5, "neighborsUdpPing: Peer " << p->host); |
62e76326 | 653 | |
654 | if (!peerWouldBePinged(p, request)) | |
655 | continue; /* next peer */ | |
656 | ||
657 | peers_pinged++; | |
658 | ||
bf8fe701 | 659 | debugs(15, 4, "neighborsUdpPing: pinging peer " << p->host << " for '" << url << "'"); |
62e76326 | 660 | |
bf8fe701 | 661 | debugs(15, 3, "neighborsUdpPing: key = '" << entry->getMD5Text() << "'"); |
62e76326 | 662 | |
bf8fe701 | 663 | debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum); |
090089c4 | 664 | |
dc9d133b | 665 | #if USE_HTCP |
4f4fa815 | 666 | if (p->options.htcp && !p->options.htcp_only_clr) { |
bebf08ff AJ |
667 | if (Config.Port.htcp <= 0) { |
668 | debugs(15, DBG_CRITICAL, "HTCP is disabled! Cannot send HTCP request to peer."); | |
669 | continue; | |
670 | } | |
671 | ||
bf8fe701 | 672 | debugs(15, 3, "neighborsUdpPing: sending HTCP query"); |
bebf08ff | 673 | if (htcpQuery(entry, request, p) <= 0) continue; // unable to send. |
62e76326 | 674 | } else |
dc9d133b | 675 | #endif |
bebf08ff AJ |
676 | { |
677 | if (Config.Port.icp <= 0 || theOutIcpConnection <= 0) { | |
678 | debugs(15, DBG_CRITICAL, "ICP is disabled! Cannot send ICP request to peer."); | |
679 | continue; | |
62e76326 | 680 | } else { |
62e76326 | 681 | |
bebf08ff AJ |
682 | if (p->type == PEER_MULTICAST) |
683 | mcastSetTtl(theOutIcpConnection, p->mcast.ttl); | |
684 | ||
685 | if (p->icp.port == echo_port) { | |
686 | debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping"); | |
687 | echo_hdr.reqnum = reqnum; | |
688 | query = _icp_common_t::createMessage(ICP_DECHO, 0, url, reqnum, 0); | |
689 | icpUdpSend(theOutIcpConnection,p->in_addr,query,LOG_ICP_QUERY,0); | |
690 | } else { | |
691 | flags = 0; | |
62e76326 | 692 | |
bebf08ff AJ |
693 | if (Config.onoff.query_icmp) |
694 | if (p->icp.version == ICP_VERSION_2) | |
695 | flags |= ICP_FLAG_SRC_RTT; | |
62e76326 | 696 | |
bebf08ff AJ |
697 | query = _icp_common_t::createMessage(ICP_QUERY, flags, url, reqnum, 0); |
698 | ||
699 | icpUdpSend(theOutIcpConnection, p->in_addr, query, LOG_ICP_QUERY, 0); | |
700 | } | |
62e76326 | 701 | } |
bebf08ff | 702 | } |
62e76326 | 703 | |
704 | queries_sent++; | |
705 | ||
706 | p->stats.pings_sent++; | |
707 | ||
708 | if (p->type == PEER_MULTICAST) { | |
1bf2cd49 | 709 | mcast_exprep += p->mcast.n_replies_expected; |
710 | mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected); | |
62e76326 | 711 | } else if (neighborUp(p)) { |
712 | /* its alive, expect a reply from it */ | |
713 | ||
714 | if (neighborType(p, request) == PEER_PARENT) { | |
715 | parent_exprep++; | |
716 | parent_timeout += p->stats.rtt; | |
717 | } else { | |
718 | sibling_exprep++; | |
719 | sibling_timeout += p->stats.rtt; | |
720 | } | |
721 | } else { | |
722 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ | |
723 | /* log it once at the threshold */ | |
724 | ||
725 | if (p->stats.logged_state == PEER_ALIVE) { | |
bf8fe701 | 726 | debugs(15, 1, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 727 | p->stats.logged_state = PEER_DEAD; |
728 | } | |
729 | } | |
730 | ||
731 | p->stats.last_query = squid_curtime; | |
732 | ||
67c8308c | 733 | /* |
734 | * keep probe_start == 0 for a multicast peer, | |
735 | * so neighborUp() never says this peer is dead. | |
736 | */ | |
737 | ||
738 | if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0)) | |
62e76326 | 739 | p->stats.probe_start = squid_curtime; |
090089c4 | 740 | } |
62e76326 | 741 | |
40a1495e | 742 | if ((first_ping = first_ping->next) == NULL) |
62e76326 | 743 | first_ping = Config.peers; |
090089c4 | 744 | |
a8c926ff | 745 | /* |
746 | * How many replies to expect? | |
747 | */ | |
1bf2cd49 | 748 | *exprep = parent_exprep + sibling_exprep + mcast_exprep; |
a8c926ff | 749 | |
52040193 | 750 | /* |
465dc415 | 751 | * If there is a configured timeout, use it |
52040193 | 752 | */ |
465dc415 | 753 | if (Config.Timeout.icp_query) |
62e76326 | 754 | *timeout = Config.Timeout.icp_query; |
28993292 | 755 | else { |
62e76326 | 756 | if (*exprep > 0) { |
757 | if (parent_exprep) | |
758 | *timeout = 2 * parent_timeout / parent_exprep; | |
1bf2cd49 | 759 | else if (mcast_exprep) |
760 | *timeout = 2 * mcast_timeout / mcast_exprep; | |
62e76326 | 761 | else |
762 | *timeout = 2 * sibling_timeout / sibling_exprep; | |
763 | } else | |
764 | *timeout = 2000; /* 2 seconds */ | |
765 | ||
766 | if (Config.Timeout.icp_query_max) | |
767 | if (*timeout > Config.Timeout.icp_query_max) | |
768 | *timeout = Config.Timeout.icp_query_max; | |
769 | ||
770 | if (*timeout < Config.Timeout.icp_query_min) | |
771 | *timeout = Config.Timeout.icp_query_min; | |
28993292 | 772 | } |
62e76326 | 773 | |
0a0bf5db | 774 | return peers_pinged; |
090089c4 | 775 | } |
776 | ||
26b164ac | 777 | /* lookup the digest of a given peer */ |
778 | lookup_t | |
190154cf | 779 | peerDigestLookup(peer * p, HttpRequest * request) |
26b164ac | 780 | { |
6cfa8966 | 781 | #if USE_CACHE_DIGESTS |
f66a9ef4 | 782 | const cache_key *key = request ? storeKeyPublicByRequest(request) : NULL; |
26b164ac | 783 | assert(p); |
0c511722 | 784 | assert(request); |
bf8fe701 | 785 | debugs(15, 5, "peerDigestLookup: peer " << p->host); |
4b4cd312 | 786 | /* does the peeer have a valid digest? */ |
62e76326 | 787 | |
e13ee7ad | 788 | if (!p->digest) { |
bf8fe701 | 789 | debugs(15, 5, "peerDigestLookup: gone!"); |
62e76326 | 790 | return LOOKUP_NONE; |
6755df2e | 791 | } else if (!peerHTTPOkay(p, request)) { |
bf8fe701 | 792 | debugs(15, 5, "peerDigestLookup: !peerHTTPOkay"); |
6755df2e | 793 | return LOOKUP_NONE; |
e13ee7ad | 794 | } else if (!p->digest->flags.needed) { |
bf8fe701 | 795 | debugs(15, 5, "peerDigestLookup: note need"); |
62e76326 | 796 | peerDigestNeeded(p->digest); |
797 | return LOOKUP_NONE; | |
4ed0e075 | 798 | } else if (!p->digest->flags.usable) { |
bf8fe701 | 799 | debugs(15, 5, "peerDigestLookup: !ready && " << (p->digest->flags.requested ? "" : "!") << "requested"); |
62e76326 | 800 | return LOOKUP_NONE; |
26b164ac | 801 | } |
62e76326 | 802 | |
bf8fe701 | 803 | debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p->host); |
e13ee7ad | 804 | assert(p->digest->cd); |
26b164ac | 805 | /* does digest predict a hit? */ |
62e76326 | 806 | |
e13ee7ad | 807 | if (!cacheDigestTest(p->digest->cd, key)) |
62e76326 | 808 | return LOOKUP_MISS; |
809 | ||
bf8fe701 | 810 | debugs(15, 5, "peerDigestLookup: peer " << p->host << " says HIT!"); |
62e76326 | 811 | |
26b164ac | 812 | return LOOKUP_HIT; |
62e76326 | 813 | |
26b164ac | 814 | #endif |
62e76326 | 815 | |
26b164ac | 816 | return LOOKUP_NONE; |
817 | } | |
818 | ||
819 | /* select best peer based on cache digests */ | |
a54d3f8e | 820 | peer * |
190154cf | 821 | neighborsDigestSelect(HttpRequest * request) |
a54d3f8e | 822 | { |
823 | peer *best_p = NULL; | |
6cfa8966 | 824 | #if USE_CACHE_DIGESTS |
62e76326 | 825 | |
a54d3f8e | 826 | const cache_key *key; |
827 | int best_rtt = 0; | |
828 | int choice_count = 0; | |
829 | int ichoice_count = 0; | |
830 | peer *p; | |
831 | int p_rtt; | |
832 | int i; | |
62e76326 | 833 | |
03058802 | 834 | if (!request->flags.hierarchical) |
62e76326 | 835 | return NULL; |
836 | ||
f66a9ef4 | 837 | key = storeKeyPublicByRequest(request); |
62e76326 | 838 | |
a54d3f8e | 839 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 840 | lookup_t lookup; |
841 | ||
842 | if (!p) | |
843 | p = Config.peers; | |
844 | ||
845 | if (i == 1) | |
846 | first_ping = p; | |
847 | ||
848 | lookup = peerDigestLookup(p, request); | |
849 | ||
850 | if (lookup == LOOKUP_NONE) | |
851 | continue; | |
852 | ||
853 | choice_count++; | |
854 | ||
855 | if (lookup == LOOKUP_MISS) | |
856 | continue; | |
857 | ||
858 | p_rtt = netdbHostRtt(p->host); | |
859 | ||
bf8fe701 | 860 | debugs(15, 5, "neighborsDigestSelect: peer " << p->host << " rtt: " << p_rtt); |
62e76326 | 861 | |
862 | /* is this peer better than others in terms of rtt ? */ | |
863 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { | |
864 | best_p = p; | |
865 | best_rtt = p_rtt; | |
866 | ||
867 | if (p_rtt) /* informative choice (aka educated guess) */ | |
868 | ichoice_count++; | |
869 | ||
bf8fe701 | 870 | debugs(15, 4, "neighborsDigestSelect: peer " << p->host << " leads with rtt " << best_rtt); |
62e76326 | 871 | } |
a54d3f8e | 872 | } |
62e76326 | 873 | |
bf8fe701 | 874 | debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count << " (" << ichoice_count << ")"); |
26b164ac | 875 | peerNoteDigestLookup(request, best_p, |
62e76326 | 876 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); |
a54d3f8e | 877 | request->hier.n_choices = choice_count; |
878 | request->hier.n_ichoices = ichoice_count; | |
879 | #endif | |
62e76326 | 880 | |
a54d3f8e | 881 | return best_p; |
882 | } | |
883 | ||
26b164ac | 884 | void |
190154cf | 885 | peerNoteDigestLookup(HttpRequest * request, peer * p, lookup_t lookup) |
26b164ac | 886 | { |
6cfa8966 | 887 | #if USE_CACHE_DIGESTS |
62e76326 | 888 | |
26b164ac | 889 | if (p) |
62e76326 | 890 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)); |
26b164ac | 891 | else |
62e76326 | 892 | *request->hier.cd_host = '\0'; |
893 | ||
26b164ac | 894 | request->hier.cd_lookup = lookup; |
62e76326 | 895 | |
26ac0430 AJ |
896 | debugs(15, 4, "peerNoteDigestLookup: peer " << |
897 | (p ? p->host : "<none>") << ", lookup: " << | |
898 | lookup_t_str[lookup] ); | |
62e76326 | 899 | |
26b164ac | 900 | #endif |
901 | } | |
902 | ||
d73844ca | 903 | static void |
b69f7771 | 904 | neighborAlive(peer * p, const MemObject * mem, const icp_common_t * header) |
4eda6afe | 905 | { |
32a47e3e | 906 | peerAlive(p); |
44f2f2e4 | 907 | p->stats.pings_acked++; |
62e76326 | 908 | |
27cd7235 | 909 | if ((icp_opcode) header->opcode <= ICP_END) |
62e76326 | 910 | p->icp.counts[header->opcode]++; |
911 | ||
44f2f2e4 | 912 | p->icp.version = (int) header->version; |
913 | } | |
914 | ||
915 | static void | |
916 | neighborUpdateRtt(peer * p, MemObject * mem) | |
917 | { | |
d1b63fc8 | 918 | int rtt, rtt_av_factor; |
62e76326 | 919 | |
d2cd6935 | 920 | if (!mem) |
62e76326 | 921 | return; |
922 | ||
44f2f2e4 | 923 | if (!mem->start_ping.tv_sec) |
62e76326 | 924 | return; |
925 | ||
44f2f2e4 | 926 | rtt = tvSubMsec(mem->start_ping, current_time); |
62e76326 | 927 | |
1b6ef2d2 | 928 | if (rtt < 1 || rtt > 10000) |
62e76326 | 929 | return; |
930 | ||
d1b63fc8 | 931 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 932 | |
d1b63fc8 | 933 | if (p->options.weighted_roundrobin) |
62e76326 | 934 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
935 | ||
1b6ef2d2 | 936 | p->stats.rtt = intAverage(p->stats.rtt, rtt, |
62e76326 | 937 | p->stats.pings_acked, rtt_av_factor); |
4eda6afe | 938 | } |
090089c4 | 939 | |
399cabec | 940 | #if USE_HTCP |
941 | static void | |
942 | neighborAliveHtcp(peer * p, const MemObject * mem, const htcpReplyData * htcp) | |
943 | { | |
32a47e3e | 944 | peerAlive(p); |
f80286f6 | 945 | p->stats.pings_acked++; |
399cabec | 946 | p->htcp.counts[htcp->hit ? 1 : 0]++; |
44f2f2e4 | 947 | p->htcp.version = htcp->version; |
399cabec | 948 | } |
62e76326 | 949 | |
399cabec | 950 | #endif |
951 | ||
38792624 | 952 | static void |
56b62ecc | 953 | neighborCountIgnored(peer * p) |
a7e59001 | 954 | { |
b69f7771 | 955 | if (p == NULL) |
62e76326 | 956 | return; |
957 | ||
b69f7771 | 958 | p->stats.ignored_replies++; |
62e76326 | 959 | |
c7a3724d | 960 | NLateReplies++; |
a7e59001 | 961 | } |
962 | ||
e102ebda | 963 | static peer *non_peers = NULL; |
964 | ||
965 | static void | |
ad61a2b4 | 966 | neighborIgnoreNonPeer(const IpAddress &from, icp_opcode opcode) |
e102ebda | 967 | { |
968 | peer *np; | |
62e76326 | 969 | |
26ac0430 | 970 | for (np = non_peers; np; np = np->next) { |
cc192b50 | 971 | if (np->in_addr != from) |
62e76326 | 972 | continue; |
973 | ||
cc192b50 | 974 | if (np->in_addr.GetPort() != from.GetPort()) |
62e76326 | 975 | continue; |
976 | ||
977 | break; | |
e102ebda | 978 | } |
62e76326 | 979 | |
26ac0430 | 980 | if (np == NULL) { |
62e76326 | 981 | np = (peer *)xcalloc(1, sizeof(peer)); |
cc192b50 | 982 | np->in_addr = from; |
983 | np->icp.port = from.GetPort(); | |
62e76326 | 984 | np->type = PEER_NONE; |
cc192b50 | 985 | np->host = new char[MAX_IPSTRLEN]; |
986 | from.NtoA(np->host,MAX_IPSTRLEN); | |
62e76326 | 987 | np->next = non_peers; |
988 | non_peers = np; | |
e102ebda | 989 | } |
62e76326 | 990 | |
399cabec | 991 | np->icp.counts[opcode]++; |
62e76326 | 992 | |
e4cc2fdf | 993 | if (isPowTen(++np->stats.ignored_replies)) |
bf8fe701 | 994 | debugs(15, 1, "WARNING: Ignored " << np->stats.ignored_replies << " replies from non-peer " << np->host); |
e102ebda | 995 | } |
996 | ||
429fdbec | 997 | /* ignoreMulticastReply |
26ac0430 | 998 | * |
d6827718 | 999 | * * We want to ignore replies from multicast peers if the |
1000 | * * cache_host_domain rules would normally prevent the peer | |
1001 | * * from being used | |
429fdbec | 1002 | */ |
1003 | static int | |
b69f7771 | 1004 | ignoreMulticastReply(peer * p, MemObject * mem) |
429fdbec | 1005 | { |
b69f7771 | 1006 | if (p == NULL) |
62e76326 | 1007 | return 0; |
1008 | ||
cd196bc8 | 1009 | if (!p->options.mcast_responder) |
62e76326 | 1010 | return 0; |
1011 | ||
b69f7771 | 1012 | if (peerHTTPOkay(p, mem->request)) |
62e76326 | 1013 | return 0; |
1014 | ||
429fdbec | 1015 | return 1; |
1016 | } | |
1017 | ||
1018 | /* I should attach these records to the entry. We take the first | |
1019 | * hit we get our wait until everyone misses. The timeout handler | |
1020 | * call needs to nip this shopping list or call one of the misses. | |
26ac0430 | 1021 | * |
429fdbec | 1022 | * If a hit process is already started, then sobeit |
1023 | */ | |
b8d8561b | 1024 | void |
62e76326 | 1025 | |
ad61a2b4 | 1026 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const IpAddress &from) |
090089c4 | 1027 | { |
b69f7771 | 1028 | peer *p = NULL; |
5ad33356 | 1029 | StoreEntry *entry; |
1030 | MemObject *mem = NULL; | |
b6c0e933 | 1031 | peer_t ntype = PEER_NONE; |
5e5126cc | 1032 | char *opcode_d; |
a7e59001 | 1033 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 1034 | |
4a7a3d56 | 1035 | debugs(15, 6, "neighborsUdpAck: opcode " << opcode << " '" << storeKeyText(key) << "'"); |
62e76326 | 1036 | |
c8f4eac4 | 1037 | if (NULL != (entry = Store::Root().get(key))) |
62e76326 | 1038 | mem = entry->mem_obj; |
1039 | ||
b69f7771 | 1040 | if ((p = whichPeer(from))) |
62e76326 | 1041 | neighborAlive(p, mem, header); |
1042 | ||
27cd7235 | 1043 | if (opcode > ICP_END) |
62e76326 | 1044 | return; |
1045 | ||
27cd7235 | 1046 | opcode_d = icp_opcode_str[opcode]; |
62e76326 | 1047 | |
41587298 | 1048 | if (p) |
62e76326 | 1049 | neighborUpdateRtt(p, mem); |
1050 | ||
5ad33356 | 1051 | /* Does the entry exist? */ |
26ac0430 | 1052 | if (NULL == entry) { |
bf8fe701 | 1053 | debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1054 | neighborCountIgnored(p); |
1055 | return; | |
5ad33356 | 1056 | } |
62e76326 | 1057 | |
2d1c6a4f | 1058 | /* check if someone is already fetching it */ |
26ac0430 | 1059 | if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1060 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1061 | neighborCountIgnored(p); |
1062 | return; | |
d2af9477 | 1063 | } |
62e76326 | 1064 | |
26ac0430 | 1065 | if (mem == NULL) { |
bf8fe701 | 1066 | debugs(15, 2, "Ignoring " << opcode_d << " for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1067 | neighborCountIgnored(p); |
1068 | return; | |
8de2f7ad | 1069 | } |
62e76326 | 1070 | |
26ac0430 | 1071 | if (entry->ping_status != PING_WAITING) { |
bf8fe701 | 1072 | debugs(15, 2, "neighborsUdpAck: Late " << opcode_d << " for " << storeKeyText(key)); |
62e76326 | 1073 | neighborCountIgnored(p); |
1074 | return; | |
8de2f7ad | 1075 | } |
62e76326 | 1076 | |
26ac0430 | 1077 | if (entry->lock_count == 0) { |
bf8fe701 | 1078 | debugs(12, 1, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1079 | neighborCountIgnored(p); |
1080 | return; | |
090089c4 | 1081 | } |
62e76326 | 1082 | |
bf8fe701 | 1083 | debugs(15, 3, "neighborsUdpAck: " << opcode_d << " for '" << storeKeyText(key) << "' from " << (p ? p->host : "source") << " "); |
62e76326 | 1084 | |
26ac0430 | 1085 | if (p) { |
62e76326 | 1086 | ntype = neighborType(p, mem->request); |
44f2f2e4 | 1087 | } |
62e76326 | 1088 | |
26ac0430 | 1089 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1090 | neighborCountIgnored(p); |
26ac0430 | 1091 | } else if (opcode == ICP_MISS) { |
62e76326 | 1092 | if (p == NULL) { |
1093 | neighborIgnoreNonPeer(from, opcode); | |
1094 | } else { | |
1095 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); | |
1096 | } | |
26ac0430 | 1097 | } else if (opcode == ICP_HIT) { |
62e76326 | 1098 | if (p == NULL) { |
1099 | neighborIgnoreNonPeer(from, opcode); | |
1100 | } else { | |
1101 | header->opcode = ICP_HIT; | |
1102 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); | |
1103 | } | |
26ac0430 | 1104 | } else if (opcode == ICP_DECHO) { |
62e76326 | 1105 | if (p == NULL) { |
1106 | neighborIgnoreNonPeer(from, opcode); | |
1107 | } else if (ntype == PEER_SIBLING) { | |
1108 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); | |
1109 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
1110 | } else { | |
1111 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); | |
1112 | } | |
26ac0430 | 1113 | } else if (opcode == ICP_SECHO) { |
62e76326 | 1114 | if (p) { |
bf8fe701 | 1115 | debugs(15, 1, "Ignoring SECHO from neighbor " << p->host); |
62e76326 | 1116 | neighborCountIgnored(p); |
62e76326 | 1117 | } else { |
cc192b50 | 1118 | debugs(15, 1, "Unsolicited SECHO from " << from); |
62e76326 | 1119 | } |
26ac0430 | 1120 | } else if (opcode == ICP_DENIED) { |
62e76326 | 1121 | if (p == NULL) { |
1122 | neighborIgnoreNonPeer(from, opcode); | |
1123 | } else if (p->stats.pings_acked > 100) { | |
1124 | if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) { | |
bf8fe701 | 1125 | debugs(15, 0, "95%% of replies from '" << p->host << "' are UDP_DENIED"); |
1126 | debugs(15, 0, "Disabling '" << p->host << "', please check your configuration."); | |
62e76326 | 1127 | neighborRemove(p); |
1128 | p = NULL; | |
1129 | } else { | |
1130 | neighborCountIgnored(p); | |
1131 | } | |
1132 | } | |
26ac0430 | 1133 | } else if (opcode == ICP_MISS_NOFETCH) { |
62e76326 | 1134 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); |
26ac0430 | 1135 | } else { |
bf8fe701 | 1136 | debugs(15, 0, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d); |
d2af9477 | 1137 | } |
090089c4 | 1138 | } |
1139 | ||
deb79f06 | 1140 | peer * |
40a1495e | 1141 | peerFindByName(const char *name) |
98ffb7e4 | 1142 | { |
b69f7771 | 1143 | peer *p = NULL; |
62e76326 | 1144 | |
40a1495e | 1145 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1146 | if (!strcasecmp(name, p->name)) |
1147 | break; | |
98ffb7e4 | 1148 | } |
62e76326 | 1149 | |
b69f7771 | 1150 | return p; |
98ffb7e4 | 1151 | } |
b012353a | 1152 | |
db1cd23c | 1153 | peer * |
1154 | peerFindByNameAndPort(const char *name, unsigned short port) | |
1155 | { | |
1156 | peer *p = NULL; | |
62e76326 | 1157 | |
db1cd23c | 1158 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1159 | if (strcasecmp(name, p->name)) |
1160 | continue; | |
1161 | ||
1162 | if (port != p->http_port) | |
1163 | continue; | |
1164 | ||
1165 | break; | |
db1cd23c | 1166 | } |
62e76326 | 1167 | |
db1cd23c | 1168 | return p; |
1169 | } | |
1170 | ||
5269d0bd | 1171 | int |
b69f7771 | 1172 | neighborUp(const peer * p) |
5269d0bd | 1173 | { |
eb406bb7 | 1174 | if (!p->tcp_up) { |
cc192b50 | 1175 | if (!peerProbeConnect((peer *) p)) { |
1176 | debugs(15, 8, "neighborUp: DOWN (probed): " << p->host << " (" << p->in_addr << ")"); | |
4ed0e075 | 1177 | return 0; |
cc192b50 | 1178 | } |
eb406bb7 | 1179 | } |
62e76326 | 1180 | |
64b8103b | 1181 | /* |
1182 | * The peer can not be UP if we don't have any IP addresses | |
26ac0430 | 1183 | * for it. |
64b8103b | 1184 | */ |
cc192b50 | 1185 | if (0 == p->n_addresses) { |
1186 | debugs(15, 8, "neighborUp: DOWN (no-ip): " << p->host << " (" << p->in_addr << ")"); | |
62e76326 | 1187 | return 0; |
cc192b50 | 1188 | } |
62e76326 | 1189 | |
cc192b50 | 1190 | if (p->options.no_query) { |
1191 | debugs(15, 8, "neighborUp: UP (no-query): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1192 | return 1; |
cc192b50 | 1193 | } |
67c8308c | 1194 | |
1195 | if (p->stats.probe_start != 0 && | |
cc192b50 | 1196 | squid_curtime - p->stats.probe_start > Config.Timeout.deadPeer) { |
1197 | debugs(15, 8, "neighborUp: DOWN (dead): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1198 | return 0; |
cc192b50 | 1199 | } |
67c8308c | 1200 | |
cc192b50 | 1201 | debugs(15, 8, "neighborUp: UP: " << p->host << " (" << p->in_addr << ")"); |
03b82057 | 1202 | return 1; |
5269d0bd | 1203 | } |
1204 | ||
e6e3b09b | 1205 | void |
28c60158 | 1206 | peerDestroy(void *data) |
e6e3b09b | 1207 | { |
e6ccf245 | 1208 | peer *p = (peer *)data; |
62e76326 | 1209 | |
ee4a1f5d | 1210 | struct _domain_ping *l = NULL; |
62e76326 | 1211 | |
ee4a1f5d | 1212 | struct _domain_ping *nl = NULL; |
62e76326 | 1213 | |
b69f7771 | 1214 | if (p == NULL) |
62e76326 | 1215 | return; |
1216 | ||
b6a2f15e | 1217 | for (l = p->peer_domain; l; l = nl) { |
62e76326 | 1218 | nl = l->next; |
1219 | safe_free(l->domain); | |
1220 | safe_free(l); | |
ee4a1f5d | 1221 | } |
62e76326 | 1222 | |
b69f7771 | 1223 | safe_free(p->host); |
be753325 | 1224 | safe_free(p->name); |
1225 | safe_free(p->domain); | |
e13ee7ad | 1226 | #if USE_CACHE_DIGESTS |
62e76326 | 1227 | |
fa80a8ef | 1228 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1229 | #endif |
e6e3b09b | 1230 | } |
c7a3724d | 1231 | |
e13ee7ad | 1232 | void |
e16d4250 | 1233 | peerNoteDigestGone(peer * p) |
e13ee7ad | 1234 | { |
1235 | #if USE_CACHE_DIGESTS | |
fa80a8ef | 1236 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1237 | #endif |
1238 | } | |
1239 | ||
dd4bd44e | 1240 | static void |
03a1ee42 | 1241 | peerDNSConfigure(const ipcache_addrs * ia, void *data) |
dd4bd44e | 1242 | { |
e6ccf245 | 1243 | peer *p = (peer *)data; |
62e76326 | 1244 | |
dd4bd44e | 1245 | int j; |
62e76326 | 1246 | |
b69f7771 | 1247 | if (p->n_addresses == 0) { |
bf8fe701 | 1248 | debugs(15, 1, "Configuring " << neighborTypeStr(p) << " " << p->host << "/" << p->http_port << "/" << p->icp.port); |
62e76326 | 1249 | |
1250 | if (p->type == PEER_MULTICAST) | |
bf8fe701 | 1251 | debugs(15, 1, " Multicast TTL = " << p->mcast.ttl); |
b69f7771 | 1252 | } |
62e76326 | 1253 | |
b69f7771 | 1254 | p->n_addresses = 0; |
62e76326 | 1255 | |
dd4bd44e | 1256 | if (ia == NULL) { |
bf8fe701 | 1257 | debugs(0, 0, "WARNING: DNS lookup for '" << p->host << "' failed!"); |
62e76326 | 1258 | return; |
dd4bd44e | 1259 | } |
62e76326 | 1260 | |
c04fe656 | 1261 | if ((int) ia->count < 1) { |
bf8fe701 | 1262 | debugs(0, 0, "WARNING: No IP address found for '" << p->host << "'!"); |
62e76326 | 1263 | return; |
dd4bd44e | 1264 | } |
62e76326 | 1265 | |
dc3a5177 | 1266 | p->tcp_up = PEER_TCP_MAGIC_COUNT; |
1267 | ||
c04fe656 | 1268 | for (j = 0; j < (int) ia->count && j < PEER_MAX_ADDRESSES; j++) { |
62e76326 | 1269 | p->addresses[j] = ia->in_addrs[j]; |
cc192b50 | 1270 | debugs(15, 2, "--> IP address #" << j << ": " << p->addresses[j]); |
62e76326 | 1271 | p->n_addresses++; |
dd4bd44e | 1272 | } |
62e76326 | 1273 | |
cc192b50 | 1274 | p->in_addr.SetEmpty(); |
1275 | p->in_addr = p->addresses[0]; | |
1276 | p->in_addr.SetPort(p->icp.port); | |
62e76326 | 1277 | |
b69f7771 | 1278 | if (p->type == PEER_MULTICAST) |
62e76326 | 1279 | peerCountMcastPeersSchedule(p, 10); |
1280 | ||
9b5c4a9a | 1281 | #if USE_ICMP |
1a827bc0 | 1282 | if (p->type != PEER_MULTICAST) |
62e76326 | 1283 | if (!p->options.no_netdb_exchange) |
1284 | eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1); | |
9b5c4a9a AJ |
1285 | #endif |
1286 | ||
dd4bd44e | 1287 | } |
1288 | ||
1289 | static void | |
51242273 | 1290 | peerRefreshDNS(void *data) |
dd4bd44e | 1291 | { |
b69f7771 | 1292 | peer *p = NULL; |
62e76326 | 1293 | |
46ca5fc6 | 1294 | if (eventFind(peerRefreshDNS, NULL)) |
62e76326 | 1295 | eventDelete(peerRefreshDNS, NULL); |
1296 | ||
51242273 | 1297 | if (!data && 0 == stat5minClientRequests()) { |
62e76326 | 1298 | /* no recent client traffic, wait a bit */ |
1299 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 180.0, 1); | |
1300 | return; | |
dd4bd44e | 1301 | } |
62e76326 | 1302 | |
1f3c4622 | 1303 | for (p = Config.peers; p; p = p->next) |
62e76326 | 1304 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); |
1305 | ||
dd4bd44e | 1306 | /* Reconfigure the peers every hour */ |
52040193 | 1307 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 3600.0, 1); |
dd4bd44e | 1308 | } |
e924600d | 1309 | |
4ed0e075 | 1310 | static void |
1311 | peerConnectFailedSilent(peer * p) | |
eb406bb7 | 1312 | { |
1313 | p->stats.last_connect_failure = squid_curtime; | |
62e76326 | 1314 | |
eb406bb7 | 1315 | if (!p->tcp_up) { |
bf8fe701 | 1316 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << |
1317 | " dead"); | |
62e76326 | 1318 | return; |
eb406bb7 | 1319 | } |
62e76326 | 1320 | |
eb406bb7 | 1321 | p->tcp_up--; |
62e76326 | 1322 | |
eb406bb7 | 1323 | if (!p->tcp_up) { |
bf8fe701 | 1324 | debugs(15, 1, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 1325 | p->stats.logged_state = PEER_DEAD; |
eb406bb7 | 1326 | } |
1327 | } | |
1328 | ||
4ed0e075 | 1329 | void |
1330 | peerConnectFailed(peer *p) | |
1331 | { | |
bf8fe701 | 1332 | debugs(15, 1, "TCP connection to " << p->host << "/" << p->http_port << " failed"); |
4ed0e075 | 1333 | peerConnectFailedSilent(p); |
1334 | } | |
1335 | ||
eb406bb7 | 1336 | void |
a4b8110e | 1337 | peerConnectSucceded(peer * p) |
eb406bb7 | 1338 | { |
1339 | if (!p->tcp_up) { | |
bf8fe701 | 1340 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << " succeded"); |
32a47e3e AJ |
1341 | p->tcp_up = PEER_TCP_MAGIC_COUNT; // NP: so peerAlive(p) works properly. |
1342 | peerAlive(p); | |
26ac0430 AJ |
1343 | if (!p->n_addresses) |
1344 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); | |
1345 | } else | |
32a47e3e | 1346 | p->tcp_up = PEER_TCP_MAGIC_COUNT; |
eb406bb7 | 1347 | } |
1348 | ||
46574433 AR |
1349 | /// called by Comm when test_fd is closed while connect is in progress |
1350 | static void | |
1351 | peerProbeClosed(int fd, void *data) | |
1352 | { | |
1353 | peer *p = (peer*)data; | |
1354 | p->test_fd = -1; | |
1355 | // it is a failure because we failed to connect | |
1356 | peerConnectFailedSilent(p); | |
1357 | } | |
1358 | ||
e924600d | 1359 | static void |
4ed0e075 | 1360 | peerProbeConnectTimeout(int fd, void *data) |
1361 | { | |
1362 | peer * p = (peer *)data; | |
46574433 | 1363 | comm_remove_close_handler(fd, &peerProbeClosed, p); |
4ed0e075 | 1364 | comm_close(fd); |
1365 | p->test_fd = -1; | |
1366 | peerConnectFailedSilent(p); | |
1367 | } | |
1368 | ||
1369 | /* | |
26ac0430 | 1370 | * peerProbeConnect will be called on dead peers by neighborUp |
4ed0e075 | 1371 | */ |
1372 | static int | |
a4b8110e | 1373 | peerProbeConnect(peer * p) |
e924600d | 1374 | { |
e924600d | 1375 | int fd; |
4ed0e075 | 1376 | time_t ctimeout = p->connect_timeout > 0 ? p->connect_timeout |
1377 | : Config.Timeout.peer_connect; | |
1378 | int ret = squid_curtime - p->stats.last_connect_failure > ctimeout * 10; | |
62e76326 | 1379 | |
eb406bb7 | 1380 | if (p->test_fd != -1) |
4ed0e075 | 1381 | return ret;/* probe already running */ |
62e76326 | 1382 | |
4ed0e075 | 1383 | if (squid_curtime - p->stats.last_connect_probe == 0) |
1384 | return ret;/* don't probe to often */ | |
62e76326 | 1385 | |
ad61a2b4 | 1386 | IpAddress temp(getOutgoingAddr(NULL,p)); |
cc192b50 | 1387 | |
1388 | fd = comm_open(SOCK_STREAM, IPPROTO_TCP, temp, COMM_NONBLOCKING, p->host); | |
62e76326 | 1389 | |
e924600d | 1390 | if (fd < 0) |
4ed0e075 | 1391 | return ret; |
1392 | ||
46574433 | 1393 | comm_add_close_handler(fd, &peerProbeClosed, p); |
4ed0e075 | 1394 | commSetTimeout(fd, ctimeout, peerProbeConnectTimeout, p); |
62e76326 | 1395 | |
03a1ee42 | 1396 | p->test_fd = fd; |
62e76326 | 1397 | |
eb406bb7 | 1398 | p->stats.last_connect_probe = squid_curtime; |
62e76326 | 1399 | |
03a1ee42 | 1400 | commConnectStart(p->test_fd, |
62e76326 | 1401 | p->host, |
1402 | p->http_port, | |
1403 | peerProbeConnectDone, | |
1404 | p); | |
4ed0e075 | 1405 | |
1406 | return ret; | |
e924600d | 1407 | } |
1408 | ||
1409 | static void | |
f3400a93 | 1410 | peerProbeConnectDone(int fd, comm_err_t status, int xerrno, void *data) |
e924600d | 1411 | { |
e6ccf245 | 1412 | peer *p = (peer*)data; |
62e76326 | 1413 | |
98829f69 | 1414 | if (status == COMM_OK) { |
62e76326 | 1415 | peerConnectSucceded(p); |
e924600d | 1416 | } else { |
4ed0e075 | 1417 | peerConnectFailedSilent(p); |
e924600d | 1418 | } |
62e76326 | 1419 | |
46574433 | 1420 | comm_remove_close_handler(fd, &peerProbeClosed, p); |
e924600d | 1421 | comm_close(fd); |
eb406bb7 | 1422 | p->test_fd = -1; |
e924600d | 1423 | return; |
1424 | } | |
1425 | ||
429fdbec | 1426 | static void |
1427 | peerCountMcastPeersSchedule(peer * p, time_t when) | |
1428 | { | |
b515fc11 | 1429 | if (p->mcast.flags.count_event_pending) |
62e76326 | 1430 | return; |
1431 | ||
429fdbec | 1432 | eventAdd("peerCountMcastPeersStart", |
62e76326 | 1433 | peerCountMcastPeersStart, |
1434 | p, | |
1435 | (double) when, 1); | |
1436 | ||
b515fc11 | 1437 | p->mcast.flags.count_event_pending = 1; |
429fdbec | 1438 | } |
1439 | ||
1440 | static void | |
1441 | peerCountMcastPeersStart(void *data) | |
1442 | { | |
e6ccf245 | 1443 | peer *p = (peer *)data; |
28c60158 | 1444 | ps_state *psstate; |
429fdbec | 1445 | StoreEntry *fake; |
1446 | MemObject *mem; | |
1447 | icp_common_t *query; | |
007b8be4 | 1448 | int reqnum; |
429fdbec | 1449 | LOCAL_ARRAY(char, url, MAX_URL); |
ce66013b | 1450 | assert(p->type == PEER_MULTICAST); |
b515fc11 | 1451 | p->mcast.flags.count_event_pending = 0; |
cc192b50 | 1452 | snprintf(url, MAX_URL, "http://"); |
1453 | p->in_addr.ToURL(url+7, MAX_URL -8 ); | |
1454 | strcat(url, "/"); | |
e429f975 | 1455 | fake = storeCreateEntry(url, url, request_flags(), METHOD_GET); |
c21ad0f5 | 1456 | HttpRequest *req = HttpRequest::CreateFromUrl(url); |
b24880fe | 1457 | psstate = new ps_state; |
6dd9f4bd | 1458 | psstate->request = HTTPMSGLOCK(req); |
429fdbec | 1459 | psstate->entry = fake; |
1460 | psstate->callback = NULL; | |
99117d82 | 1461 | psstate->callback_data = cbdataReference(p); |
b4e7f82d | 1462 | psstate->ping.start = current_time; |
429fdbec | 1463 | mem = fake->mem_obj; |
6dd9f4bd | 1464 | mem->request = HTTPMSGLOCK(psstate->request); |
429fdbec | 1465 | mem->start_ping = current_time; |
b4e7f82d | 1466 | mem->ping_reply_callback = peerCountHandleIcpReply; |
429fdbec | 1467 | mem->ircb_data = psstate; |
03a1ee42 | 1468 | mcastSetTtl(theOutIcpConnection, p->mcast.ttl); |
007b8be4 | 1469 | p->mcast.id = mem->id; |
332dafa2 | 1470 | reqnum = icpSetCacheKey((const cache_key *)fake->key); |
e6ccf245 | 1471 | query = _icp_common_t::createMessage(ICP_QUERY, 0, url, reqnum, 0); |
429fdbec | 1472 | icpUdpSend(theOutIcpConnection, |
cc192b50 | 1473 | p->in_addr, |
62e76326 | 1474 | query, |
1475 | LOG_ICP_QUERY, | |
1476 | 0); | |
429fdbec | 1477 | fake->ping_status = PING_WAITING; |
1478 | eventAdd("peerCountMcastPeersDone", | |
62e76326 | 1479 | peerCountMcastPeersDone, |
1480 | psstate, | |
99117d82 | 1481 | Config.Timeout.mcast_icp_query / 1000.0, 1); |
b515fc11 | 1482 | p->mcast.flags.counting = 1; |
429fdbec | 1483 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); |
1484 | } | |
1485 | ||
1486 | static void | |
1487 | peerCountMcastPeersDone(void *data) | |
1488 | { | |
e6ccf245 | 1489 | ps_state *psstate = (ps_state *)data; |
429fdbec | 1490 | StoreEntry *fake = psstate->entry; |
99117d82 | 1491 | |
1492 | if (cbdataReferenceValid(psstate->callback_data)) { | |
1493 | peer *p = (peer *)psstate->callback_data; | |
1494 | p->mcast.flags.counting = 0; | |
1495 | p->mcast.avg_n_members = doubleAverage(p->mcast.avg_n_members, | |
1496 | (double) psstate->ping.n_recv, | |
1497 | ++p->mcast.n_times_counted, | |
1498 | 10); | |
bf8fe701 | 1499 | debugs(15, 1, "Group " << p->host << ": " << psstate->ping.n_recv << |
1500 | " replies, "<< std::setw(4)<< std::setprecision(2) << | |
1501 | p->mcast.avg_n_members <<" average, RTT " << p->stats.rtt); | |
99117d82 | 1502 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; |
1503 | } | |
1504 | ||
1505 | cbdataReferenceDone(psstate->callback_data); | |
1506 | ||
b7fe0ab0 | 1507 | EBIT_SET(fake->flags, ENTRY_ABORTED); |
6dd9f4bd | 1508 | HTTPMSGUNLOCK(fake->mem_obj->request); |
d88e3c49 | 1509 | fake->releaseRequest(); |
97b5e68f | 1510 | fake->unlock(); |
6dd9f4bd | 1511 | HTTPMSGUNLOCK(psstate->request); |
1a827bc0 | 1512 | cbdataFree(psstate); |
429fdbec | 1513 | } |
1514 | ||
1515 | static void | |
5942e8d4 | 1516 | peerCountHandleIcpReply(peer * p, peer_t type, protocol_t proto, void *hdrnotused, void *data) |
429fdbec | 1517 | { |
d1b63fc8 | 1518 | int rtt_av_factor; |
1519 | ||
e6ccf245 | 1520 | ps_state *psstate = (ps_state *)data; |
1a827bc0 | 1521 | StoreEntry *fake = psstate->entry; |
1522 | MemObject *mem = fake->mem_obj; | |
1523 | int rtt = tvSubMsec(mem->start_ping, current_time); | |
86aebcda | 1524 | assert(proto == PROTO_ICP); |
1a827bc0 | 1525 | assert(fake); |
1526 | assert(mem); | |
b4e7f82d | 1527 | psstate->ping.n_recv++; |
d1b63fc8 | 1528 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 1529 | |
d1b63fc8 | 1530 | if (p->options.weighted_roundrobin) |
62e76326 | 1531 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
1532 | ||
d1b63fc8 | 1533 | p->stats.rtt = intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, rtt_av_factor); |
429fdbec | 1534 | } |
ed7f5615 | 1535 | |
1536 | static void | |
1537 | neighborDumpPeers(StoreEntry * sentry) | |
1538 | { | |
1539 | dump_peers(sentry, Config.peers); | |
1540 | } | |
1541 | ||
1542 | static void | |
1543 | neighborDumpNonPeers(StoreEntry * sentry) | |
1544 | { | |
1545 | dump_peers(sentry, non_peers); | |
1546 | } | |
1547 | ||
a369131d | 1548 | void |
1549 | dump_peer_options(StoreEntry * sentry, peer * p) | |
1550 | { | |
cd196bc8 | 1551 | if (p->options.proxy_only) |
62e76326 | 1552 | storeAppendPrintf(sentry, " proxy-only"); |
1553 | ||
cd196bc8 | 1554 | if (p->options.no_query) |
62e76326 | 1555 | storeAppendPrintf(sentry, " no-query"); |
1556 | ||
d1b63fc8 | 1557 | if (p->options.background_ping) |
62e76326 | 1558 | storeAppendPrintf(sentry, " background-ping"); |
1559 | ||
cd196bc8 | 1560 | if (p->options.no_digest) |
62e76326 | 1561 | storeAppendPrintf(sentry, " no-digest"); |
1562 | ||
cd196bc8 | 1563 | if (p->options.default_parent) |
62e76326 | 1564 | storeAppendPrintf(sentry, " default"); |
1565 | ||
cd196bc8 | 1566 | if (p->options.roundrobin) |
62e76326 | 1567 | storeAppendPrintf(sentry, " round-robin"); |
1568 | ||
f7e1d9ce HN |
1569 | if (p->options.carp) |
1570 | storeAppendPrintf(sentry, " carp"); | |
1571 | ||
1572 | if (p->options.userhash) | |
1573 | storeAppendPrintf(sentry, " userhash"); | |
1574 | ||
1575 | if (p->options.userhash) | |
1576 | storeAppendPrintf(sentry, " sourcehash"); | |
1577 | ||
d1b63fc8 | 1578 | if (p->options.weighted_roundrobin) |
62e76326 | 1579 | storeAppendPrintf(sentry, " weighted-round-robin"); |
1580 | ||
cd196bc8 | 1581 | if (p->options.mcast_responder) |
62e76326 | 1582 | storeAppendPrintf(sentry, " multicast-responder"); |
1583 | ||
678a066c | 1584 | if (p->weight != 1) |
62e76326 | 1585 | storeAppendPrintf(sentry, " weight=%d", p->weight); |
1586 | ||
cd196bc8 | 1587 | if (p->options.closest_only) |
62e76326 | 1588 | storeAppendPrintf(sentry, " closest-only"); |
1589 | ||
dc9d133b | 1590 | #if USE_HTCP |
cd196bc8 | 1591 | if (p->options.htcp) |
62e76326 | 1592 | storeAppendPrintf(sentry, " htcp"); |
26ac0430 AJ |
1593 | if (p->options.htcp_oldsquid) |
1594 | storeAppendPrintf(sentry, " htcp-oldsquid"); | |
1595 | if (p->options.htcp_no_clr) | |
1596 | storeAppendPrintf(sentry, " htcp-no-clr"); | |
1597 | if (p->options.htcp_no_purge_clr) | |
1598 | storeAppendPrintf(sentry, " htcp-no-purge-clr"); | |
1599 | if (p->options.htcp_only_clr) | |
1600 | storeAppendPrintf(sentry, " htcp-only-clr"); | |
dc9d133b | 1601 | #endif |
62e76326 | 1602 | |
cd196bc8 | 1603 | if (p->options.no_netdb_exchange) |
62e76326 | 1604 | storeAppendPrintf(sentry, " no-netdb-exchange"); |
1605 | ||
95e36d02 | 1606 | #if DELAY_POOLS |
62e76326 | 1607 | |
cd196bc8 | 1608 | if (p->options.no_delay) |
62e76326 | 1609 | storeAppendPrintf(sentry, " no-delay"); |
1610 | ||
95e36d02 | 1611 | #endif |
62e76326 | 1612 | |
c68e9c6b | 1613 | if (p->login) |
62e76326 | 1614 | storeAppendPrintf(sentry, " login=%s", p->login); |
1615 | ||
a369131d | 1616 | if (p->mcast.ttl > 0) |
62e76326 | 1617 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); |
1618 | ||
be753325 | 1619 | if (p->connect_timeout > 0) |
62e76326 | 1620 | storeAppendPrintf(sentry, " connect-timeout=%d", (int) p->connect_timeout); |
1621 | ||
be753325 | 1622 | #if USE_CACHE_DIGESTS |
62e76326 | 1623 | |
be753325 | 1624 | if (p->digest_url) |
62e76326 | 1625 | storeAppendPrintf(sentry, " digest-url=%s", p->digest_url); |
1626 | ||
be753325 | 1627 | #endif |
62e76326 | 1628 | |
be753325 | 1629 | if (p->options.allow_miss) |
62e76326 | 1630 | storeAppendPrintf(sentry, " allow-miss"); |
1631 | ||
be753325 | 1632 | if (p->max_conn > 0) |
62e76326 | 1633 | storeAppendPrintf(sentry, " max-conn=%d", p->max_conn); |
1634 | ||
be753325 | 1635 | if (p->options.originserver) |
62e76326 | 1636 | storeAppendPrintf(sentry, " originserver"); |
1637 | ||
be753325 | 1638 | if (p->domain) |
62e76326 | 1639 | storeAppendPrintf(sentry, " forceddomain=%s", p->domain); |
1640 | ||
26ac0430 AJ |
1641 | if (p->connection_auth == 0) |
1642 | storeAppendPrintf(sentry, " connection-auth=off"); | |
1643 | else if (p->connection_auth == 1) | |
1644 | storeAppendPrintf(sentry, " connection-auth=on"); | |
1645 | else if (p->connection_auth == 2) | |
1646 | storeAppendPrintf(sentry, " connection-auth=auto"); | |
d67acb4e | 1647 | |
a369131d | 1648 | storeAppendPrintf(sentry, "\n"); |
1649 | } | |
1650 | ||
ed7f5615 | 1651 | static void |
1652 | dump_peers(StoreEntry * sentry, peer * peers) | |
1653 | { | |
1654 | peer *e = NULL; | |
cc192b50 | 1655 | char ntoabuf[MAX_IPSTRLEN]; |
ed7f5615 | 1656 | struct _domain_ping *d = NULL; |
1657 | icp_opcode op; | |
06e6d12a | 1658 | int i; |
62e76326 | 1659 | |
ed7f5615 | 1660 | if (peers == NULL) |
62e76326 | 1661 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); |
1662 | ||
ed7f5615 | 1663 | for (e = peers; e; e = e->next) { |
62e76326 | 1664 | assert(e->host != NULL); |
1665 | storeAppendPrintf(sentry, "\n%-11.11s: %s\n", | |
1666 | neighborTypeStr(e), | |
1667 | e->name); | |
1668 | storeAppendPrintf(sentry, "Host : %s/%d/%d\n", | |
1669 | e->host, | |
1670 | e->http_port, | |
1671 | e->icp.port); | |
1672 | storeAppendPrintf(sentry, "Flags :"); | |
1673 | dump_peer_options(sentry, e); | |
1674 | ||
1675 | for (i = 0; i < e->n_addresses; i++) { | |
1676 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, | |
cc192b50 | 1677 | e->addresses[i].NtoA(ntoabuf,MAX_IPSTRLEN) ); |
62e76326 | 1678 | } |
1679 | ||
1680 | storeAppendPrintf(sentry, "Status : %s\n", | |
1681 | neighborUp(e) ? "Up" : "Down"); | |
1682 | storeAppendPrintf(sentry, "FETCHES : %d\n", e->stats.fetches); | |
1683 | storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open); | |
1684 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
1685 | ||
1686 | if (!e->options.no_query) { | |
1687 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", | |
1688 | (int) (squid_curtime - e->stats.last_query)); | |
1689 | ||
1690 | if (e->stats.last_reply > 0) | |
1691 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1692 | (int) (squid_curtime - e->stats.last_reply)); | |
1693 | else | |
1694 | storeAppendPrintf(sentry, "LAST REPLY : none received\n"); | |
1695 | ||
1696 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1697 | ||
1698 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1699 | e->stats.pings_acked, | |
1700 | percent(e->stats.pings_acked, e->stats.pings_sent)); | |
1701 | } | |
1702 | ||
1703 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", | |
1704 | e->stats.ignored_replies, | |
1705 | percent(e->stats.ignored_replies, e->stats.pings_acked)); | |
1706 | ||
1707 | if (!e->options.no_query) { | |
1708 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1994bb24 | 1709 | #if USE_HTCP |
62e76326 | 1710 | |
1711 | if (e->options.htcp) { | |
1712 | storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n", | |
1713 | e->htcp.counts[0], | |
1714 | percent(e->htcp.counts[0], e->stats.pings_acked)); | |
1715 | storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n", | |
1716 | e->htcp.counts[1], | |
1717 | percent(e->htcp.counts[1], e->stats.pings_acked)); | |
1718 | } else { | |
1994bb24 | 1719 | #endif |
62e76326 | 1720 | |
1721 | for (op = ICP_INVALID; op < ICP_END; ++op) { | |
1722 | if (e->icp.counts[op] == 0) | |
1723 | continue; | |
1724 | ||
1725 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1726 | icp_opcode_str[op], | |
1727 | e->icp.counts[op], | |
1728 | percent(e->icp.counts[op], e->stats.pings_acked)); | |
1729 | } | |
1730 | ||
1994bb24 | 1731 | #if USE_HTCP |
62e76326 | 1732 | |
1733 | } | |
1734 | ||
1994bb24 | 1735 | #endif |
62e76326 | 1736 | |
1737 | } | |
1738 | ||
1739 | if (e->stats.last_connect_failure) { | |
1740 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", | |
1741 | mkhttpdlogtime(&(e->stats.last_connect_failure))); | |
1742 | } | |
1743 | ||
1744 | if (e->peer_domain != NULL) { | |
1745 | storeAppendPrintf(sentry, "DOMAIN LIST: "); | |
1746 | ||
1747 | for (d = e->peer_domain; d; d = d->next) { | |
1748 | storeAppendPrintf(sentry, "%s%s ", | |
1749 | d->do_ping ? null_string : "!", d->domain); | |
1750 | } | |
1751 | ||
1752 | storeAppendPrintf(sentry, "\n"); | |
1753 | } | |
1754 | ||
1755 | storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", | |
1756 | percent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); | |
ed7f5615 | 1757 | } |
1758 | } | |
86aebcda | 1759 | |
1760 | #if USE_HTCP | |
1761 | void | |
ad61a2b4 | 1762 | neighborsHtcpReply(const cache_key * key, htcpReplyData * htcp, const IpAddress &from) |
86aebcda | 1763 | { |
53525d53 | 1764 | StoreEntry *e = Store::Root().get(key); |
399cabec | 1765 | MemObject *mem = NULL; |
1766 | peer *p; | |
1767 | peer_t ntype = PEER_NONE; | |
26ac0430 AJ |
1768 | debugs(15, 6, "neighborsHtcpReply: " << |
1769 | (htcp->hit ? "HIT" : "MISS") << " " << | |
1770 | storeKeyText(key) ); | |
62e76326 | 1771 | |
88e13392 | 1772 | if (NULL != e) |
62e76326 | 1773 | mem = e->mem_obj; |
1774 | ||
399cabec | 1775 | if ((p = whichPeer(from))) |
62e76326 | 1776 | neighborAliveHtcp(p, mem, htcp); |
1777 | ||
399cabec | 1778 | /* Does the entry exist? */ |
26ac0430 | 1779 | if (NULL == e) { |
bf8fe701 | 1780 | debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1781 | neighborCountIgnored(p); |
1782 | return; | |
399cabec | 1783 | } |
62e76326 | 1784 | |
399cabec | 1785 | /* check if someone is already fetching it */ |
26ac0430 | 1786 | if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1787 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1788 | neighborCountIgnored(p); |
1789 | return; | |
399cabec | 1790 | } |
62e76326 | 1791 | |
26ac0430 | 1792 | if (mem == NULL) { |
bf8fe701 | 1793 | debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1794 | neighborCountIgnored(p); |
1795 | return; | |
399cabec | 1796 | } |
62e76326 | 1797 | |
26ac0430 | 1798 | if (e->ping_status != PING_WAITING) { |
bf8fe701 | 1799 | debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key) << " is not PING_WAITING"); |
62e76326 | 1800 | neighborCountIgnored(p); |
1801 | return; | |
399cabec | 1802 | } |
62e76326 | 1803 | |
26ac0430 | 1804 | if (e->lock_count == 0) { |
bf8fe701 | 1805 | debugs(12, 1, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1806 | neighborCountIgnored(p); |
1807 | return; | |
399cabec | 1808 | } |
62e76326 | 1809 | |
26ac0430 | 1810 | if (p) { |
62e76326 | 1811 | ntype = neighborType(p, mem->request); |
1812 | neighborUpdateRtt(p, mem); | |
44f2f2e4 | 1813 | } |
62e76326 | 1814 | |
26ac0430 | 1815 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1816 | neighborCountIgnored(p); |
1817 | return; | |
399cabec | 1818 | } |
62e76326 | 1819 | |
bf8fe701 | 1820 | debugs(15, 3, "neighborsHtcpReply: e = " << e); |
b4e7f82d | 1821 | mem->ping_reply_callback(p, ntype, PROTO_HTCP, htcp, mem->ircb_data); |
86aebcda | 1822 | } |
62e76326 | 1823 | |
1bd06eff BR |
1824 | /* |
1825 | * Send HTCP CLR messages to all peers configured to receive them. | |
1826 | */ | |
4f4fa815 | 1827 | void |
8dceeee3 | 1828 | neighborsHtcpClear(StoreEntry * e, const char *uri, HttpRequest * req, const HttpRequestMethod &method, htcp_clr_reason reason) |
4f4fa815 BR |
1829 | { |
1830 | peer *p; | |
1831 | char buf[128]; | |
1832 | ||
4f4fa815 BR |
1833 | for (p = Config.peers; p; p = p->next) { |
1834 | if (!p->options.htcp) { | |
1835 | continue; | |
1836 | } | |
1837 | if (p->options.htcp_no_clr) { | |
1838 | continue; | |
1839 | } | |
1840 | if (p->options.htcp_no_purge_clr && reason == HTCP_CLR_PURGE) { | |
1841 | continue; | |
1842 | } | |
1bd06eff | 1843 | debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p->in_addr.ToURL(buf, 128)); |
4f4fa815 BR |
1844 | htcpClear(e, uri, req, method, p, reason); |
1845 | } | |
1846 | } | |
1847 | ||
86aebcda | 1848 | #endif |