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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" |
28618087 | 42 | #include "forward.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" |
5844d003 | 55 | #include "NeighborTypeDomainList.h" |
f0ba2534 | 56 | #include "neighbors.h" |
aa839030 | 57 | #include "PeerDigest.h" |
b24880fe | 58 | #include "PeerSelectState.h" |
f206b652 | 59 | #include "RequestFlags.h" |
4d5904f7 | 60 | #include "SquidConfig.h" |
a98bcbee | 61 | #include "SquidMath.h" |
985c86bc | 62 | #include "SquidTime.h" |
6ea5959e | 63 | #include "stat.h" |
aa839030 | 64 | #include "Store.h" |
fb548aaf | 65 | #include "store_key_md5.h" |
8d03bdb4 | 66 | #include "tools.h" |
b1bd952a | 67 | #include "URL.h" |
090089c4 | 68 | |
429fdbec | 69 | /* count mcast group peers every 15 minutes */ |
70 | #define MCAST_COUNT_RATE 900 | |
71 | ||
a3c6762c FC |
72 | bool peerAllowedToUse(const CachePeer *, HttpRequest *); |
73 | static int peerWouldBePinged(const CachePeer *, HttpRequest *); | |
74 | static void neighborRemove(CachePeer *); | |
75 | static void neighborAlive(CachePeer *, const MemObject *, const icp_common_t *); | |
399cabec | 76 | #if USE_HTCP |
a3c6762c | 77 | static void neighborAliveHtcp(CachePeer *, const MemObject *, const htcpReplyData *); |
399cabec | 78 | #endif |
a3c6762c | 79 | static void neighborCountIgnored(CachePeer *); |
f5b8bbc4 | 80 | static void peerRefreshDNS(void *); |
b69f7771 | 81 | static IPH peerDNSConfigure; |
a3c6762c | 82 | static bool peerProbeConnect(CachePeer *); |
eb406bb7 | 83 | static CNCB peerProbeConnectDone; |
f5b8bbc4 | 84 | static void peerCountMcastPeersDone(void *data); |
85 | static void peerCountMcastPeersStart(void *data); | |
a3c6762c | 86 | static void peerCountMcastPeersSchedule(CachePeer * p, time_t when); |
b3264694 | 87 | static IRCB peerCountHandleIcpReply; |
62e76326 | 88 | |
b7ac5457 | 89 | static void neighborIgnoreNonPeer(const Ip::Address &, icp_opcode); |
ed7f5615 | 90 | static OBJH neighborDumpPeers; |
91 | static OBJH neighborDumpNonPeers; | |
a3c6762c | 92 | static void dump_peers(StoreEntry * sentry, CachePeer * peers); |
090089c4 | 93 | |
f45dd259 | 94 | static unsigned short echo_port; |
30a4f2a8 | 95 | |
c7a3724d | 96 | static int NLateReplies = 0; |
a3c6762c | 97 | static CachePeer *first_ping = NULL; |
28070024 | 98 | |
a2c963ae | 99 | const char * |
a3c6762c | 100 | neighborTypeStr(const CachePeer * p) |
69a71bd7 | 101 | { |
e102ebda | 102 | if (p->type == PEER_NONE) |
62e76326 | 103 | return "Non-Peer"; |
104 | ||
b69f7771 | 105 | if (p->type == PEER_SIBLING) |
62e76326 | 106 | return "Sibling"; |
107 | ||
b69f7771 | 108 | if (p->type == PEER_MULTICAST) |
62e76326 | 109 | return "Multicast Group"; |
110 | ||
69a71bd7 | 111 | return "Parent"; |
112 | } | |
113 | ||
a3c6762c | 114 | CachePeer * |
b7ac5457 | 115 | whichPeer(const Ip::Address &from) |
090089c4 | 116 | { |
22e4fa85 | 117 | int j; |
62e76326 | 118 | |
a3c6762c | 119 | CachePeer *p = NULL; |
cc192b50 | 120 | debugs(15, 3, "whichPeer: from " << from); |
62e76326 | 121 | |
26ac0430 | 122 | for (p = Config.peers; p; p = p->next) { |
5db6bf73 | 123 | for (j = 0; j < p->n_addresses; ++j) { |
cc192b50 | 124 | if (from == p->addresses[j] && from.GetPort() == p->icp.port) { |
62e76326 | 125 | return p; |
126 | } | |
127 | } | |
090089c4 | 128 | } |
62e76326 | 129 | |
4eda6afe | 130 | return NULL; |
090089c4 | 131 | } |
132 | ||
701a8572 | 133 | peer_t |
a3c6762c | 134 | neighborType(const CachePeer * p, const HttpRequest * request) |
24a1003d | 135 | { |
62e76326 | 136 | |
5844d003 | 137 | const NeighborTypeDomainList *d = NULL; |
62e76326 | 138 | |
b69f7771 | 139 | for (d = p->typelist; d; d = d->next) { |
cc192b50 | 140 | if (0 == matchDomainName(request->GetHost(), d->domain)) |
62e76326 | 141 | if (d->type != PEER_NONE) |
142 | return d->type; | |
24a1003d | 143 | } |
8a368316 AJ |
144 | #if PEER_MULTICAST_SIBLINGS |
145 | if (p->type == PEER_MULTICAST) | |
146 | if (p->options.mcast_siblings) | |
147 | return PEER_SIBLING; | |
148 | #endif | |
62e76326 | 149 | |
b69f7771 | 150 | return p->type; |
24a1003d | 151 | } |
152 | ||
2efeb0b7 AJ |
153 | /** |
154 | * \return Whether it is appropriate to fetch REQUEST from PEER. | |
7b3bd12c | 155 | */ |
2efeb0b7 | 156 | bool |
a3c6762c | 157 | peerAllowedToUse(const CachePeer * p, HttpRequest * request) |
090089c4 | 158 | { |
62e76326 | 159 | |
b802d2cb | 160 | const CachePeerDomainList *d = NULL; |
ce66013b | 161 | assert(request != NULL); |
62e76326 | 162 | |
9689d97c | 163 | if (neighborType(p, request) == PEER_SIBLING) { |
8a368316 AJ |
164 | #if PEER_MULTICAST_SIBLINGS |
165 | if (p->type == PEER_MULTICAST && p->options.mcast_siblings && | |
450fe1cb | 166 | (request->flags.noCache || request->flags.refresh || request->flags.loopDetected || request->flags.needValidation)) |
11992b6f | 167 | debugs(15, 2, "peerAllowedToUse(" << p->name << ", " << request->GetHost() << ") : multicast-siblings optimization match"); |
8a368316 | 168 | #endif |
450fe1cb | 169 | if (request->flags.noCache) |
2efeb0b7 | 170 | return false; |
62e76326 | 171 | |
45e5102d | 172 | if (request->flags.refresh) |
2efeb0b7 | 173 | return false; |
62e76326 | 174 | |
450fe1cb | 175 | if (request->flags.loopDetected) |
2efeb0b7 | 176 | return false; |
62e76326 | 177 | |
450fe1cb | 178 | if (request->flags.needValidation) |
2efeb0b7 | 179 | return false; |
9689d97c | 180 | } |
62e76326 | 181 | |
ad46590b | 182 | // CONNECT requests are proxy requests. Not to be forwarded to origin servers. |
a3c6762c | 183 | // Unless the destination port matches, in which case we MAY perform a 'DIRECT' to this CachePeer. |
c2a7cefd | 184 | if (p->options.originserver && request->method == Http::METHOD_CONNECT && request->port != p->in_addr.GetPort()) |
2efeb0b7 | 185 | return false; |
ad46590b | 186 | |
b6a2f15e | 187 | if (p->peer_domain == NULL && p->access == NULL) |
2efeb0b7 | 188 | return true; |
62e76326 | 189 | |
2efeb0b7 | 190 | bool do_ping = false; |
b6a2f15e | 191 | for (d = p->peer_domain; d; d = d->next) { |
cc192b50 | 192 | if (0 == matchDomainName(request->GetHost(), d->domain)) { |
62e76326 | 193 | do_ping = d->do_ping; |
194 | break; | |
195 | } | |
196 | ||
197 | do_ping = !d->do_ping; | |
30a4f2a8 | 198 | } |
62e76326 | 199 | |
2efeb0b7 AJ |
200 | if (p->peer_domain && !do_ping) |
201 | return false; | |
62e76326 | 202 | |
505e35db | 203 | if (p->access == NULL) |
62e76326 | 204 | return do_ping; |
205 | ||
c0941a6a | 206 | ACLFilledChecklist checklist(p->access, request, NULL); |
8ae8bb05 | 207 | checklist.src_addr = request->client_addr; |
3c11d1f5 | 208 | checklist.my_addr = request->my_addr; |
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 | ||
a3c6762c | 251 | /* Return TRUE if it is okay to send an HTTP request to this CachePeer. */ |
8ff4505b | 252 | int |
a3c6762c | 253 | peerHTTPOkay(const CachePeer * p, HttpRequest * request) |
62fd6124 | 254 | { |
6315602c JGD |
255 | if (p->max_conn) |
256 | if (p->stats.conn_open >= p->max_conn) | |
257 | return 0; | |
258 | ||
b69f7771 | 259 | if (!peerAllowedToUse(p, request)) |
62e76326 | 260 | return 0; |
261 | ||
b69f7771 | 262 | if (!neighborUp(p)) |
62e76326 | 263 | return 0; |
264 | ||
62fd6124 | 265 | return 1; |
266 | } | |
267 | ||
3c6e634f | 268 | int |
190154cf | 269 | neighborsCount(HttpRequest * request) |
090089c4 | 270 | { |
a3c6762c | 271 | CachePeer *p = NULL; |
090089c4 | 272 | int count = 0; |
62e76326 | 273 | |
40a1495e | 274 | for (p = Config.peers; p; p = p->next) |
62e76326 | 275 | if (peerWouldBePinged(p, request)) |
5db6bf73 | 276 | ++count; |
62e76326 | 277 | |
bf8fe701 | 278 | debugs(15, 3, "neighborsCount: " << count); |
62e76326 | 279 | |
3c6e634f | 280 | return count; |
281 | } | |
090089c4 | 282 | |
a3c6762c | 283 | CachePeer * |
190154cf | 284 | getFirstUpParent(HttpRequest * request) |
090089c4 | 285 | { |
a3c6762c | 286 | CachePeer *p = NULL; |
62e76326 | 287 | |
40a1495e | 288 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 289 | if (!neighborUp(p)) |
290 | continue; | |
291 | ||
292 | if (neighborType(p, request) != PEER_PARENT) | |
293 | continue; | |
294 | ||
295 | if (!peerHTTPOkay(p, request)) | |
296 | continue; | |
297 | ||
298 | break; | |
090089c4 | 299 | } |
62e76326 | 300 | |
bf8fe701 | 301 | debugs(15, 3, "getFirstUpParent: returning " << (p ? p->host : "NULL")); |
b69f7771 | 302 | return p; |
090089c4 | 303 | } |
304 | ||
a3c6762c | 305 | CachePeer * |
190154cf | 306 | getRoundRobinParent(HttpRequest * request) |
48b38d01 | 307 | { |
a3c6762c FC |
308 | CachePeer *p; |
309 | CachePeer *q = NULL; | |
62e76326 | 310 | |
40a1495e | 311 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 312 | if (!p->options.roundrobin) |
313 | continue; | |
314 | ||
315 | if (neighborType(p, request) != PEER_PARENT) | |
316 | continue; | |
317 | ||
318 | if (!peerHTTPOkay(p, request)) | |
319 | continue; | |
320 | ||
1d0bef67 | 321 | if (p->weight == 0) |
0d5a2006 | 322 | continue; |
1d0bef67 AJ |
323 | |
324 | if (q) { | |
325 | if (p->weight == q->weight) { | |
326 | if (q->rr_count < p->rr_count) | |
327 | continue; | |
2d3d0b4e | 328 | } else if ( ((double) q->rr_count / q->weight) < ((double) p->rr_count / p->weight)) { |
1d0bef67 AJ |
329 | continue; |
330 | } | |
0d5a2006 | 331 | } |
62e76326 | 332 | |
333 | q = p; | |
48b38d01 | 334 | } |
62e76326 | 335 | |
b69f7771 | 336 | if (q) |
5db6bf73 | 337 | ++ q->rr_count; |
62e76326 | 338 | |
1d0bef67 | 339 | debugs(15, 3, HERE << "returning " << (q ? q->host : "NULL")); |
62e76326 | 340 | |
b69f7771 | 341 | return q; |
48b38d01 | 342 | } |
343 | ||
a3c6762c | 344 | CachePeer * |
190154cf | 345 | getWeightedRoundRobinParent(HttpRequest * request) |
d1b63fc8 | 346 | { |
a3c6762c FC |
347 | CachePeer *p; |
348 | CachePeer *q = NULL; | |
d1b63fc8 | 349 | int weighted_rtt; |
62e76326 | 350 | |
d1b63fc8 | 351 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 352 | if (!p->options.weighted_roundrobin) |
353 | continue; | |
354 | ||
355 | if (neighborType(p, request) != PEER_PARENT) | |
356 | continue; | |
357 | ||
358 | if (!peerHTTPOkay(p, request)) | |
359 | continue; | |
360 | ||
361 | if (q && q->rr_count < p->rr_count) | |
362 | continue; | |
363 | ||
364 | q = p; | |
d1b63fc8 | 365 | } |
62e76326 | 366 | |
d1b63fc8 | 367 | if (q && q->rr_count > 1000000) |
62e76326 | 368 | for (p = Config.peers; p; p = p->next) { |
369 | if (!p->options.weighted_roundrobin) | |
370 | continue; | |
371 | ||
372 | if (neighborType(p, request) != PEER_PARENT) | |
373 | continue; | |
374 | ||
375 | p->rr_count = 0; | |
376 | } | |
377 | ||
d1b63fc8 | 378 | if (q) { |
62e76326 | 379 | weighted_rtt = (q->stats.rtt - q->basetime) / q->weight; |
d1b63fc8 | 380 | |
62e76326 | 381 | if (weighted_rtt < 1) |
382 | weighted_rtt = 1; | |
383 | ||
384 | q->rr_count += weighted_rtt; | |
385 | ||
4a7a3d56 | 386 | debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt); |
d1b63fc8 | 387 | } |
62e76326 | 388 | |
bf8fe701 | 389 | debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q ? q->host : "NULL")); |
d1b63fc8 | 390 | return q; |
391 | } | |
392 | ||
32a47e3e AJ |
393 | /** |
394 | * This gets called every 5 minutes to clear the round-robin counter. | |
395 | * The exact timing is an arbitrary default, set on estimate timing of a | |
396 | * large number of requests in a high-performance environment during the | |
397 | * period. The larger the number of requests between cycled resets the | |
398 | * more balanced the operations. | |
399 | * | |
400 | \param data unused. | |
401 | \todo Make the reset timing a selectable parameter in squid.conf | |
402 | */ | |
26ac0430 | 403 | static void |
32a47e3e AJ |
404 | peerClearRRLoop(void *data) |
405 | { | |
406 | peerClearRR(); | |
407 | eventAdd("peerClearRR", peerClearRRLoop, data, 5 * 60.0, 0); | |
408 | } | |
409 | ||
410 | /** | |
a3c6762c | 411 | * This gets called on startup and restart to kick off the CachePeer round-robin |
32a47e3e AJ |
412 | * maintenance event. It ensures that no matter how many times its called |
413 | * no more than one event is scheduled. | |
414 | */ | |
82056f1e | 415 | void |
32a47e3e | 416 | peerClearRRStart(void) |
82056f1e | 417 | { |
7a3f0061 | 418 | static bool event_added = false; |
32a47e3e AJ |
419 | if (!event_added) { |
420 | peerClearRRLoop(NULL); | |
7a3f0061 | 421 | event_added=true; |
32a47e3e AJ |
422 | } |
423 | } | |
62e76326 | 424 | |
32a47e3e AJ |
425 | /** |
426 | * Called whenever the round-robin counters need to be reset to a sane state. | |
427 | * So far those times are: | |
d85b8894 | 428 | * - On startup and reconfigure - to set the counters to sane initial settings. |
a3c6762c | 429 | * - When a CachePeer has revived from dead, to prevent the revived CachePeer being |
32a47e3e AJ |
430 | * flooded with requests which it has 'missed' during the down period. |
431 | */ | |
432 | void | |
433 | peerClearRR() | |
434 | { | |
a3c6762c | 435 | CachePeer *p = NULL; |
32a47e3e | 436 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 437 | p->rr_count = 0; |
32a47e3e AJ |
438 | } |
439 | } | |
62e76326 | 440 | |
32a47e3e | 441 | /** |
a3c6762c | 442 | * Perform all actions when a CachePeer is detected revived. |
32a47e3e AJ |
443 | */ |
444 | void | |
a3c6762c | 445 | peerAlive(CachePeer *p) |
32a47e3e AJ |
446 | { |
447 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { | |
e0236918 | 448 | debugs(15, DBG_IMPORTANT, "Detected REVIVED " << neighborTypeStr(p) << ": " << p->name); |
32a47e3e AJ |
449 | p->stats.logged_state = PEER_ALIVE; |
450 | peerClearRR(); | |
451 | } | |
62e76326 | 452 | |
32a47e3e AJ |
453 | p->stats.last_reply = squid_curtime; |
454 | p->stats.probe_start = 0; | |
82056f1e | 455 | } |
456 | ||
a3c6762c | 457 | CachePeer * |
190154cf | 458 | getDefaultParent(HttpRequest * request) |
5269d0bd | 459 | { |
a3c6762c | 460 | CachePeer *p = NULL; |
62e76326 | 461 | |
40a1495e | 462 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 463 | if (neighborType(p, request) != PEER_PARENT) |
464 | continue; | |
465 | ||
466 | if (!p->options.default_parent) | |
467 | continue; | |
468 | ||
469 | if (!peerHTTPOkay(p, request)) | |
470 | continue; | |
471 | ||
bf8fe701 | 472 | debugs(15, 3, "getDefaultParent: returning " << p->host); |
62e76326 | 473 | |
474 | return p; | |
5269d0bd | 475 | } |
62e76326 | 476 | |
bf8fe701 | 477 | debugs(15, 3, "getDefaultParent: returning NULL"); |
5269d0bd | 478 | return NULL; |
479 | } | |
480 | ||
a3c6762c FC |
481 | CachePeer * |
482 | getNextPeer(CachePeer * p) | |
090089c4 | 483 | { |
b69f7771 | 484 | return p->next; |
090089c4 | 485 | } |
486 | ||
a3c6762c | 487 | CachePeer * |
deb79f06 | 488 | getFirstPeer(void) |
090089c4 | 489 | { |
40a1495e | 490 | return Config.peers; |
090089c4 | 491 | } |
492 | ||
b8d8561b | 493 | static void |
a3c6762c | 494 | neighborRemove(CachePeer * target) |
30a4f2a8 | 495 | { |
a3c6762c FC |
496 | CachePeer *p = NULL; |
497 | CachePeer **P = NULL; | |
40a1495e | 498 | p = Config.peers; |
499 | P = &Config.peers; | |
62e76326 | 500 | |
b69f7771 | 501 | while (p) { |
62e76326 | 502 | if (target == p) |
503 | break; | |
504 | ||
505 | P = &p->next; | |
506 | ||
507 | p = p->next; | |
b69f7771 | 508 | } |
62e76326 | 509 | |
b69f7771 | 510 | if (p) { |
62e76326 | 511 | *P = p->next; |
512 | cbdataFree(p); | |
5e263176 | 513 | --Config.npeers; |
4d64d74a | 514 | } |
62e76326 | 515 | |
40a1495e | 516 | first_ping = Config.peers; |
4d64d74a | 517 | } |
518 | ||
5f5e883f FC |
519 | static void |
520 | neighborsRegisterWithCacheManager() | |
521 | { | |
8822ebee | 522 | Mgr::RegisterAction("server_list", |
d9fc6862 A |
523 | "Peer Cache Statistics", |
524 | neighborDumpPeers, 0, 1); | |
5f5e883f | 525 | |
e0d28505 | 526 | if (Comm::IsConnOpen(icpIncomingConn)) { |
8822ebee | 527 | Mgr::RegisterAction("non_peers", |
d9fc6862 A |
528 | "List of Unknown sites sending ICP messages", |
529 | neighborDumpNonPeers, 0, 1); | |
5f5e883f FC |
530 | } |
531 | } | |
532 | ||
b8d8561b | 533 | void |
a86029b9 | 534 | neighbors_init(void) |
090089c4 | 535 | { |
30a4f2a8 | 536 | struct servent *sep = NULL; |
b263bd3f | 537 | const char *me = getMyHostname(); |
a3c6762c FC |
538 | CachePeer *thisPeer = NULL; |
539 | CachePeer *next = NULL; | |
62e76326 | 540 | |
6fdc2d18 FC |
541 | neighborsRegisterWithCacheManager(); |
542 | ||
e0d28505 | 543 | if (Comm::IsConnOpen(icpIncomingConn)) { |
62e76326 | 544 | |
545 | for (thisPeer = Config.peers; thisPeer; thisPeer = next) { | |
62e76326 | 546 | next = thisPeer->next; |
547 | ||
548 | if (0 != strcmp(thisPeer->host, me)) | |
549 | continue; | |
550 | ||
65d448bc | 551 | for (AnyP::PortCfg *s = Config.Sockaddr.http; s; s = s->next) { |
cc192b50 | 552 | if (thisPeer->http_port != s->s.GetPort()) |
62e76326 | 553 | continue; |
554 | ||
27774cee | 555 | debugs(15, DBG_IMPORTANT, "WARNING: Peer looks like this host"); |
bf8fe701 | 556 | |
27774cee | 557 | debugs(15, DBG_IMPORTANT, " Ignoring " << |
bf8fe701 | 558 | neighborTypeStr(thisPeer) << " " << thisPeer->host << |
559 | "/" << thisPeer->http_port << "/" << | |
560 | thisPeer->icp.port); | |
62e76326 | 561 | |
62e76326 | 562 | neighborRemove(thisPeer); |
563 | } | |
564 | } | |
b263bd3f | 565 | } |
62e76326 | 566 | |
5999b776 | 567 | peerRefreshDNS((void *) 1); |
62e76326 | 568 | |
9ca56f05 | 569 | sep = getservbyname("echo", "udp"); |
f45dd259 | 570 | echo_port = sep ? ntohs((unsigned short) sep->s_port) : 7; |
62e76326 | 571 | |
c68e4e90 | 572 | first_ping = Config.peers; |
62ee09ca | 573 | } |
574 | ||
b8d8561b | 575 | int |
190154cf | 576 | neighborsUdpPing(HttpRequest * request, |
62e76326 | 577 | StoreEntry * entry, |
578 | IRCB * callback, | |
579 | void *callback_data, | |
580 | int *exprep, | |
581 | int *timeout) | |
090089c4 | 582 | { |
3900307b | 583 | const char *url = entry->url(); |
b6c0e933 | 584 | MemObject *mem = entry->mem_obj; |
a3c6762c | 585 | CachePeer *p = NULL; |
090089c4 | 586 | int i; |
1061b406 | 587 | int reqnum = 0; |
6d2296d4 | 588 | int flags; |
9dee2904 | 589 | icp_common_t *query; |
429fdbec | 590 | int queries_sent = 0; |
0a0bf5db | 591 | int peers_pinged = 0; |
a8c926ff | 592 | int parent_timeout = 0, parent_exprep = 0; |
593 | int sibling_timeout = 0, sibling_exprep = 0; | |
1bf2cd49 | 594 | int mcast_timeout = 0, mcast_exprep = 0; |
090089c4 | 595 | |
40a1495e | 596 | if (Config.peers == NULL) |
62e76326 | 597 | return 0; |
598 | ||
9fb13bb6 | 599 | assert(entry->swap_status == SWAPOUT_NONE); |
62e76326 | 600 | |
b6c0e933 | 601 | mem->start_ping = current_time; |
62e76326 | 602 | |
b4e7f82d | 603 | mem->ping_reply_callback = callback; |
62e76326 | 604 | |
b6c0e933 | 605 | mem->ircb_data = callback_data; |
62e76326 | 606 | |
332dafa2 | 607 | reqnum = icpSetCacheKey((const cache_key *)entry->key); |
62e76326 | 608 | |
40a1495e | 609 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 610 | if (p == NULL) |
611 | p = Config.peers; | |
612 | ||
bf8fe701 | 613 | debugs(15, 5, "neighborsUdpPing: Peer " << p->host); |
62e76326 | 614 | |
615 | if (!peerWouldBePinged(p, request)) | |
a3c6762c | 616 | continue; /* next CachePeer */ |
62e76326 | 617 | |
5db6bf73 | 618 | ++peers_pinged; |
62e76326 | 619 | |
bf8fe701 | 620 | debugs(15, 4, "neighborsUdpPing: pinging peer " << p->host << " for '" << url << "'"); |
62e76326 | 621 | |
bf8fe701 | 622 | debugs(15, 3, "neighborsUdpPing: key = '" << entry->getMD5Text() << "'"); |
62e76326 | 623 | |
bf8fe701 | 624 | debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum); |
090089c4 | 625 | |
dc9d133b | 626 | #if USE_HTCP |
4f4fa815 | 627 | if (p->options.htcp && !p->options.htcp_only_clr) { |
bebf08ff AJ |
628 | if (Config.Port.htcp <= 0) { |
629 | debugs(15, DBG_CRITICAL, "HTCP is disabled! Cannot send HTCP request to peer."); | |
630 | continue; | |
631 | } | |
632 | ||
bf8fe701 | 633 | debugs(15, 3, "neighborsUdpPing: sending HTCP query"); |
65d448bc AJ |
634 | if (htcpQuery(entry, request, p) <= 0) |
635 | continue; // unable to send. | |
62e76326 | 636 | } else |
dc9d133b | 637 | #endif |
bebf08ff | 638 | { |
e0d28505 | 639 | if (Config.Port.icp <= 0 || !Comm::IsConnOpen(icpOutgoingConn)) { |
bebf08ff AJ |
640 | debugs(15, DBG_CRITICAL, "ICP is disabled! Cannot send ICP request to peer."); |
641 | continue; | |
62e76326 | 642 | } else { |
62e76326 | 643 | |
bebf08ff | 644 | if (p->type == PEER_MULTICAST) |
e0d28505 | 645 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
bebf08ff AJ |
646 | |
647 | if (p->icp.port == echo_port) { | |
648 | debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping"); | |
bebf08ff | 649 | query = _icp_common_t::createMessage(ICP_DECHO, 0, url, reqnum, 0); |
e0d28505 | 650 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
bebf08ff AJ |
651 | } else { |
652 | flags = 0; | |
62e76326 | 653 | |
bebf08ff AJ |
654 | if (Config.onoff.query_icmp) |
655 | if (p->icp.version == ICP_VERSION_2) | |
656 | flags |= ICP_FLAG_SRC_RTT; | |
62e76326 | 657 | |
bebf08ff AJ |
658 | query = _icp_common_t::createMessage(ICP_QUERY, flags, url, reqnum, 0); |
659 | ||
e0d28505 | 660 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
bebf08ff | 661 | } |
62e76326 | 662 | } |
bebf08ff | 663 | } |
62e76326 | 664 | |
5db6bf73 | 665 | ++queries_sent; |
62e76326 | 666 | |
5db6bf73 | 667 | ++ p->stats.pings_sent; |
62e76326 | 668 | |
669 | if (p->type == PEER_MULTICAST) { | |
1bf2cd49 | 670 | mcast_exprep += p->mcast.n_replies_expected; |
671 | mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected); | |
62e76326 | 672 | } else if (neighborUp(p)) { |
673 | /* its alive, expect a reply from it */ | |
674 | ||
675 | if (neighborType(p, request) == PEER_PARENT) { | |
5db6bf73 | 676 | ++parent_exprep; |
62e76326 | 677 | parent_timeout += p->stats.rtt; |
678 | } else { | |
5db6bf73 | 679 | ++sibling_exprep; |
62e76326 | 680 | sibling_timeout += p->stats.rtt; |
681 | } | |
682 | } else { | |
683 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ | |
684 | /* log it once at the threshold */ | |
685 | ||
686 | if (p->stats.logged_state == PEER_ALIVE) { | |
e0236918 | 687 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 688 | p->stats.logged_state = PEER_DEAD; |
689 | } | |
690 | } | |
691 | ||
692 | p->stats.last_query = squid_curtime; | |
693 | ||
67c8308c | 694 | /* |
a3c6762c FC |
695 | * keep probe_start == 0 for a multicast CachePeer, |
696 | * so neighborUp() never says this CachePeer is dead. | |
67c8308c | 697 | */ |
698 | ||
699 | if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0)) | |
62e76326 | 700 | p->stats.probe_start = squid_curtime; |
090089c4 | 701 | } |
62e76326 | 702 | |
40a1495e | 703 | if ((first_ping = first_ping->next) == NULL) |
62e76326 | 704 | first_ping = Config.peers; |
090089c4 | 705 | |
a8c926ff | 706 | /* |
707 | * How many replies to expect? | |
708 | */ | |
1bf2cd49 | 709 | *exprep = parent_exprep + sibling_exprep + mcast_exprep; |
a8c926ff | 710 | |
52040193 | 711 | /* |
465dc415 | 712 | * If there is a configured timeout, use it |
52040193 | 713 | */ |
465dc415 | 714 | if (Config.Timeout.icp_query) |
62e76326 | 715 | *timeout = Config.Timeout.icp_query; |
28993292 | 716 | else { |
62e76326 | 717 | if (*exprep > 0) { |
718 | if (parent_exprep) | |
719 | *timeout = 2 * parent_timeout / parent_exprep; | |
1bf2cd49 | 720 | else if (mcast_exprep) |
721 | *timeout = 2 * mcast_timeout / mcast_exprep; | |
62e76326 | 722 | else |
723 | *timeout = 2 * sibling_timeout / sibling_exprep; | |
724 | } else | |
725 | *timeout = 2000; /* 2 seconds */ | |
726 | ||
727 | if (Config.Timeout.icp_query_max) | |
728 | if (*timeout > Config.Timeout.icp_query_max) | |
729 | *timeout = Config.Timeout.icp_query_max; | |
730 | ||
731 | if (*timeout < Config.Timeout.icp_query_min) | |
732 | *timeout = Config.Timeout.icp_query_min; | |
28993292 | 733 | } |
62e76326 | 734 | |
0a0bf5db | 735 | return peers_pinged; |
090089c4 | 736 | } |
737 | ||
a3c6762c | 738 | /* lookup the digest of a given CachePeer */ |
26b164ac | 739 | lookup_t |
a3c6762c | 740 | peerDigestLookup(CachePeer * p, HttpRequest * request) |
26b164ac | 741 | { |
6cfa8966 | 742 | #if USE_CACHE_DIGESTS |
f66a9ef4 | 743 | const cache_key *key = request ? storeKeyPublicByRequest(request) : NULL; |
26b164ac | 744 | assert(p); |
0c511722 | 745 | assert(request); |
bf8fe701 | 746 | debugs(15, 5, "peerDigestLookup: peer " << p->host); |
4b4cd312 | 747 | /* does the peeer have a valid digest? */ |
62e76326 | 748 | |
e13ee7ad | 749 | if (!p->digest) { |
bf8fe701 | 750 | debugs(15, 5, "peerDigestLookup: gone!"); |
62e76326 | 751 | return LOOKUP_NONE; |
6755df2e | 752 | } else if (!peerHTTPOkay(p, request)) { |
bf8fe701 | 753 | debugs(15, 5, "peerDigestLookup: !peerHTTPOkay"); |
6755df2e | 754 | return LOOKUP_NONE; |
e13ee7ad | 755 | } else if (!p->digest->flags.needed) { |
bf8fe701 | 756 | debugs(15, 5, "peerDigestLookup: note need"); |
62e76326 | 757 | peerDigestNeeded(p->digest); |
758 | return LOOKUP_NONE; | |
4ed0e075 | 759 | } else if (!p->digest->flags.usable) { |
bf8fe701 | 760 | debugs(15, 5, "peerDigestLookup: !ready && " << (p->digest->flags.requested ? "" : "!") << "requested"); |
62e76326 | 761 | return LOOKUP_NONE; |
26b164ac | 762 | } |
62e76326 | 763 | |
bf8fe701 | 764 | debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p->host); |
e13ee7ad | 765 | assert(p->digest->cd); |
26b164ac | 766 | /* does digest predict a hit? */ |
62e76326 | 767 | |
e13ee7ad | 768 | if (!cacheDigestTest(p->digest->cd, key)) |
62e76326 | 769 | return LOOKUP_MISS; |
770 | ||
bf8fe701 | 771 | debugs(15, 5, "peerDigestLookup: peer " << p->host << " says HIT!"); |
62e76326 | 772 | |
26b164ac | 773 | return LOOKUP_HIT; |
62e76326 | 774 | |
26b164ac | 775 | #endif |
62e76326 | 776 | |
26b164ac | 777 | return LOOKUP_NONE; |
778 | } | |
779 | ||
a3c6762c FC |
780 | /* select best CachePeer based on cache digests */ |
781 | CachePeer * | |
190154cf | 782 | neighborsDigestSelect(HttpRequest * request) |
a54d3f8e | 783 | { |
a3c6762c | 784 | CachePeer *best_p = NULL; |
6cfa8966 | 785 | #if USE_CACHE_DIGESTS |
62e76326 | 786 | |
a54d3f8e | 787 | int best_rtt = 0; |
788 | int choice_count = 0; | |
789 | int ichoice_count = 0; | |
a3c6762c | 790 | CachePeer *p; |
a54d3f8e | 791 | int p_rtt; |
792 | int i; | |
62e76326 | 793 | |
45e5102d | 794 | if (!request->flags.hierarchical) |
62e76326 | 795 | return NULL; |
796 | ||
e91e2a72 | 797 | storeKeyPublicByRequest(request); |
62e76326 | 798 | |
a54d3f8e | 799 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 800 | lookup_t lookup; |
801 | ||
802 | if (!p) | |
803 | p = Config.peers; | |
804 | ||
805 | if (i == 1) | |
806 | first_ping = p; | |
807 | ||
808 | lookup = peerDigestLookup(p, request); | |
809 | ||
810 | if (lookup == LOOKUP_NONE) | |
811 | continue; | |
812 | ||
5db6bf73 | 813 | ++choice_count; |
62e76326 | 814 | |
815 | if (lookup == LOOKUP_MISS) | |
816 | continue; | |
817 | ||
818 | p_rtt = netdbHostRtt(p->host); | |
819 | ||
bf8fe701 | 820 | debugs(15, 5, "neighborsDigestSelect: peer " << p->host << " rtt: " << p_rtt); |
62e76326 | 821 | |
a3c6762c | 822 | /* is this CachePeer better than others in terms of rtt ? */ |
62e76326 | 823 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { |
824 | best_p = p; | |
825 | best_rtt = p_rtt; | |
826 | ||
827 | if (p_rtt) /* informative choice (aka educated guess) */ | |
5db6bf73 | 828 | ++ichoice_count; |
62e76326 | 829 | |
bf8fe701 | 830 | debugs(15, 4, "neighborsDigestSelect: peer " << p->host << " leads with rtt " << best_rtt); |
62e76326 | 831 | } |
a54d3f8e | 832 | } |
62e76326 | 833 | |
bf8fe701 | 834 | debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count << " (" << ichoice_count << ")"); |
26b164ac | 835 | peerNoteDigestLookup(request, best_p, |
62e76326 | 836 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); |
a54d3f8e | 837 | request->hier.n_choices = choice_count; |
838 | request->hier.n_ichoices = ichoice_count; | |
839 | #endif | |
62e76326 | 840 | |
a54d3f8e | 841 | return best_p; |
842 | } | |
843 | ||
26b164ac | 844 | void |
a3c6762c | 845 | peerNoteDigestLookup(HttpRequest * request, CachePeer * p, lookup_t lookup) |
26b164ac | 846 | { |
6cfa8966 | 847 | #if USE_CACHE_DIGESTS |
26b164ac | 848 | if (p) |
0a84e4fb | 849 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)-1); |
26b164ac | 850 | else |
62e76326 | 851 | *request->hier.cd_host = '\0'; |
852 | ||
26b164ac | 853 | request->hier.cd_lookup = lookup; |
4b981814 | 854 | debugs(15, 4, "peerNoteDigestLookup: peer " << (p? p->host : "<none>") << ", lookup: " << lookup_t_str[lookup] ); |
26b164ac | 855 | #endif |
856 | } | |
857 | ||
d73844ca | 858 | static void |
a3c6762c | 859 | neighborAlive(CachePeer * p, const MemObject * mem, const icp_common_t * header) |
4eda6afe | 860 | { |
32a47e3e | 861 | peerAlive(p); |
5db6bf73 | 862 | ++ p->stats.pings_acked; |
62e76326 | 863 | |
27cd7235 | 864 | if ((icp_opcode) header->opcode <= ICP_END) |
5db6bf73 | 865 | ++ p->icp.counts[header->opcode]; |
62e76326 | 866 | |
44f2f2e4 | 867 | p->icp.version = (int) header->version; |
868 | } | |
869 | ||
870 | static void | |
a3c6762c | 871 | neighborUpdateRtt(CachePeer * p, MemObject * mem) |
44f2f2e4 | 872 | { |
d1b63fc8 | 873 | int rtt, rtt_av_factor; |
62e76326 | 874 | |
d2cd6935 | 875 | if (!mem) |
62e76326 | 876 | return; |
877 | ||
44f2f2e4 | 878 | if (!mem->start_ping.tv_sec) |
62e76326 | 879 | return; |
880 | ||
44f2f2e4 | 881 | rtt = tvSubMsec(mem->start_ping, current_time); |
62e76326 | 882 | |
1b6ef2d2 | 883 | if (rtt < 1 || rtt > 10000) |
62e76326 | 884 | return; |
885 | ||
d1b63fc8 | 886 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 887 | |
d1b63fc8 | 888 | if (p->options.weighted_roundrobin) |
62e76326 | 889 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
890 | ||
a98bcbee | 891 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, p->stats.pings_acked, rtt_av_factor); |
4eda6afe | 892 | } |
090089c4 | 893 | |
399cabec | 894 | #if USE_HTCP |
895 | static void | |
a3c6762c | 896 | neighborAliveHtcp(CachePeer * p, const MemObject * mem, const htcpReplyData * htcp) |
399cabec | 897 | { |
32a47e3e | 898 | peerAlive(p); |
5db6bf73 FC |
899 | ++ p->stats.pings_acked; |
900 | ++ p->htcp.counts[htcp->hit ? 1 : 0]; | |
44f2f2e4 | 901 | p->htcp.version = htcp->version; |
399cabec | 902 | } |
62e76326 | 903 | |
399cabec | 904 | #endif |
905 | ||
38792624 | 906 | static void |
a3c6762c | 907 | neighborCountIgnored(CachePeer * p) |
a7e59001 | 908 | { |
b69f7771 | 909 | if (p == NULL) |
62e76326 | 910 | return; |
911 | ||
5db6bf73 | 912 | ++ p->stats.ignored_replies; |
62e76326 | 913 | |
5db6bf73 | 914 | ++NLateReplies; |
a7e59001 | 915 | } |
916 | ||
a3c6762c | 917 | static CachePeer *non_peers = NULL; |
e102ebda | 918 | |
919 | static void | |
b7ac5457 | 920 | neighborIgnoreNonPeer(const Ip::Address &from, icp_opcode opcode) |
e102ebda | 921 | { |
a3c6762c | 922 | CachePeer *np; |
62e76326 | 923 | |
26ac0430 | 924 | for (np = non_peers; np; np = np->next) { |
cc192b50 | 925 | if (np->in_addr != from) |
62e76326 | 926 | continue; |
927 | ||
cc192b50 | 928 | if (np->in_addr.GetPort() != from.GetPort()) |
62e76326 | 929 | continue; |
930 | ||
931 | break; | |
e102ebda | 932 | } |
62e76326 | 933 | |
26ac0430 | 934 | if (np == NULL) { |
a3c6762c | 935 | np = (CachePeer *)xcalloc(1, sizeof(CachePeer)); |
cc192b50 | 936 | np->in_addr = from; |
937 | np->icp.port = from.GetPort(); | |
62e76326 | 938 | np->type = PEER_NONE; |
cc192b50 | 939 | np->host = new char[MAX_IPSTRLEN]; |
940 | from.NtoA(np->host,MAX_IPSTRLEN); | |
62e76326 | 941 | np->next = non_peers; |
942 | non_peers = np; | |
e102ebda | 943 | } |
62e76326 | 944 | |
5db6bf73 | 945 | ++ np->icp.counts[opcode]; |
62e76326 | 946 | |
e4cc2fdf | 947 | if (isPowTen(++np->stats.ignored_replies)) |
e0236918 | 948 | debugs(15, DBG_IMPORTANT, "WARNING: Ignored " << np->stats.ignored_replies << " replies from non-peer " << np->host); |
e102ebda | 949 | } |
950 | ||
429fdbec | 951 | /* ignoreMulticastReply |
26ac0430 | 952 | * |
d6827718 | 953 | * * We want to ignore replies from multicast peers if the |
a3c6762c | 954 | * * cache_host_domain rules would normally prevent the CachePeer |
d6827718 | 955 | * * from being used |
429fdbec | 956 | */ |
957 | static int | |
a3c6762c | 958 | ignoreMulticastReply(CachePeer * p, MemObject * mem) |
429fdbec | 959 | { |
b69f7771 | 960 | if (p == NULL) |
62e76326 | 961 | return 0; |
962 | ||
cd196bc8 | 963 | if (!p->options.mcast_responder) |
62e76326 | 964 | return 0; |
965 | ||
b69f7771 | 966 | if (peerHTTPOkay(p, mem->request)) |
62e76326 | 967 | return 0; |
968 | ||
429fdbec | 969 | return 1; |
970 | } | |
971 | ||
4b981814 AJ |
972 | /** |
973 | * I should attach these records to the entry. We take the first | |
429fdbec | 974 | * hit we get our wait until everyone misses. The timeout handler |
975 | * call needs to nip this shopping list or call one of the misses. | |
26ac0430 | 976 | * |
429fdbec | 977 | * If a hit process is already started, then sobeit |
978 | */ | |
b8d8561b | 979 | void |
b7ac5457 | 980 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const Ip::Address &from) |
090089c4 | 981 | { |
a3c6762c | 982 | CachePeer *p = NULL; |
5ad33356 | 983 | StoreEntry *entry; |
984 | MemObject *mem = NULL; | |
b6c0e933 | 985 | peer_t ntype = PEER_NONE; |
a7e59001 | 986 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 987 | |
4a7a3d56 | 988 | debugs(15, 6, "neighborsUdpAck: opcode " << opcode << " '" << storeKeyText(key) << "'"); |
62e76326 | 989 | |
c8f4eac4 | 990 | if (NULL != (entry = Store::Root().get(key))) |
62e76326 | 991 | mem = entry->mem_obj; |
992 | ||
b69f7771 | 993 | if ((p = whichPeer(from))) |
62e76326 | 994 | neighborAlive(p, mem, header); |
995 | ||
27cd7235 | 996 | if (opcode > ICP_END) |
62e76326 | 997 | return; |
998 | ||
4b981814 | 999 | const char *opcode_d = icp_opcode_str[opcode]; |
62e76326 | 1000 | |
41587298 | 1001 | if (p) |
62e76326 | 1002 | neighborUpdateRtt(p, mem); |
1003 | ||
5ad33356 | 1004 | /* Does the entry exist? */ |
26ac0430 | 1005 | if (NULL == entry) { |
bf8fe701 | 1006 | debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1007 | neighborCountIgnored(p); |
1008 | return; | |
5ad33356 | 1009 | } |
62e76326 | 1010 | |
2d1c6a4f | 1011 | /* check if someone is already fetching it */ |
26ac0430 | 1012 | if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1013 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1014 | neighborCountIgnored(p); |
1015 | return; | |
d2af9477 | 1016 | } |
62e76326 | 1017 | |
26ac0430 | 1018 | if (mem == NULL) { |
bf8fe701 | 1019 | debugs(15, 2, "Ignoring " << opcode_d << " for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1020 | neighborCountIgnored(p); |
1021 | return; | |
8de2f7ad | 1022 | } |
62e76326 | 1023 | |
26ac0430 | 1024 | if (entry->ping_status != PING_WAITING) { |
bf8fe701 | 1025 | debugs(15, 2, "neighborsUdpAck: Late " << opcode_d << " for " << storeKeyText(key)); |
62e76326 | 1026 | neighborCountIgnored(p); |
1027 | return; | |
8de2f7ad | 1028 | } |
62e76326 | 1029 | |
26ac0430 | 1030 | if (entry->lock_count == 0) { |
5bd484b5 | 1031 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1032 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1033 | neighborCountIgnored(p); |
1034 | return; | |
090089c4 | 1035 | } |
62e76326 | 1036 | |
bf8fe701 | 1037 | debugs(15, 3, "neighborsUdpAck: " << opcode_d << " for '" << storeKeyText(key) << "' from " << (p ? p->host : "source") << " "); |
62e76326 | 1038 | |
26ac0430 | 1039 | if (p) { |
62e76326 | 1040 | ntype = neighborType(p, mem->request); |
44f2f2e4 | 1041 | } |
62e76326 | 1042 | |
26ac0430 | 1043 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1044 | neighborCountIgnored(p); |
26ac0430 | 1045 | } else if (opcode == ICP_MISS) { |
62e76326 | 1046 | if (p == NULL) { |
1047 | neighborIgnoreNonPeer(from, opcode); | |
1048 | } else { | |
0c3d3f65 | 1049 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1050 | } |
26ac0430 | 1051 | } else if (opcode == ICP_HIT) { |
62e76326 | 1052 | if (p == NULL) { |
1053 | neighborIgnoreNonPeer(from, opcode); | |
1054 | } else { | |
1055 | header->opcode = ICP_HIT; | |
0c3d3f65 | 1056 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1057 | } |
26ac0430 | 1058 | } else if (opcode == ICP_DECHO) { |
62e76326 | 1059 | if (p == NULL) { |
1060 | neighborIgnoreNonPeer(from, opcode); | |
1061 | } else if (ntype == PEER_SIBLING) { | |
1062 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); | |
1063 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
1064 | } else { | |
0c3d3f65 | 1065 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1066 | } |
26ac0430 | 1067 | } else if (opcode == ICP_SECHO) { |
62e76326 | 1068 | if (p) { |
e0236918 | 1069 | debugs(15, DBG_IMPORTANT, "Ignoring SECHO from neighbor " << p->host); |
62e76326 | 1070 | neighborCountIgnored(p); |
62e76326 | 1071 | } else { |
e0236918 | 1072 | debugs(15, DBG_IMPORTANT, "Unsolicited SECHO from " << from); |
62e76326 | 1073 | } |
26ac0430 | 1074 | } else if (opcode == ICP_DENIED) { |
62e76326 | 1075 | if (p == NULL) { |
1076 | neighborIgnoreNonPeer(from, opcode); | |
1077 | } else if (p->stats.pings_acked > 100) { | |
1078 | if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) { | |
fa84c01d FC |
1079 | debugs(15, DBG_CRITICAL, "95%% of replies from '" << p->host << "' are UDP_DENIED"); |
1080 | debugs(15, DBG_CRITICAL, "Disabling '" << p->host << "', please check your configuration."); | |
62e76326 | 1081 | neighborRemove(p); |
1082 | p = NULL; | |
1083 | } else { | |
1084 | neighborCountIgnored(p); | |
1085 | } | |
1086 | } | |
26ac0430 | 1087 | } else if (opcode == ICP_MISS_NOFETCH) { |
0c3d3f65 | 1088 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
26ac0430 | 1089 | } else { |
fa84c01d | 1090 | debugs(15, DBG_CRITICAL, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d); |
d2af9477 | 1091 | } |
090089c4 | 1092 | } |
1093 | ||
a3c6762c | 1094 | CachePeer * |
40a1495e | 1095 | peerFindByName(const char *name) |
98ffb7e4 | 1096 | { |
a3c6762c | 1097 | CachePeer *p = NULL; |
62e76326 | 1098 | |
40a1495e | 1099 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1100 | if (!strcasecmp(name, p->name)) |
1101 | break; | |
98ffb7e4 | 1102 | } |
62e76326 | 1103 | |
b69f7771 | 1104 | return p; |
98ffb7e4 | 1105 | } |
b012353a | 1106 | |
a3c6762c | 1107 | CachePeer * |
db1cd23c | 1108 | peerFindByNameAndPort(const char *name, unsigned short port) |
1109 | { | |
a3c6762c | 1110 | CachePeer *p = NULL; |
62e76326 | 1111 | |
db1cd23c | 1112 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1113 | if (strcasecmp(name, p->name)) |
1114 | continue; | |
1115 | ||
1116 | if (port != p->http_port) | |
1117 | continue; | |
1118 | ||
1119 | break; | |
db1cd23c | 1120 | } |
62e76326 | 1121 | |
db1cd23c | 1122 | return p; |
1123 | } | |
1124 | ||
5269d0bd | 1125 | int |
a3c6762c | 1126 | neighborUp(const CachePeer * p) |
5269d0bd | 1127 | { |
eb406bb7 | 1128 | if (!p->tcp_up) { |
a3c6762c | 1129 | if (!peerProbeConnect((CachePeer *) p)) { |
cc192b50 | 1130 | debugs(15, 8, "neighborUp: DOWN (probed): " << p->host << " (" << p->in_addr << ")"); |
4ed0e075 | 1131 | return 0; |
cc192b50 | 1132 | } |
eb406bb7 | 1133 | } |
62e76326 | 1134 | |
64b8103b | 1135 | /* |
a3c6762c | 1136 | * The CachePeer can not be UP if we don't have any IP addresses |
26ac0430 | 1137 | * for it. |
64b8103b | 1138 | */ |
cc192b50 | 1139 | if (0 == p->n_addresses) { |
1140 | debugs(15, 8, "neighborUp: DOWN (no-ip): " << p->host << " (" << p->in_addr << ")"); | |
62e76326 | 1141 | return 0; |
cc192b50 | 1142 | } |
62e76326 | 1143 | |
cc192b50 | 1144 | if (p->options.no_query) { |
1145 | debugs(15, 8, "neighborUp: UP (no-query): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1146 | return 1; |
cc192b50 | 1147 | } |
67c8308c | 1148 | |
1149 | if (p->stats.probe_start != 0 && | |
cc192b50 | 1150 | squid_curtime - p->stats.probe_start > Config.Timeout.deadPeer) { |
1151 | debugs(15, 8, "neighborUp: DOWN (dead): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1152 | return 0; |
cc192b50 | 1153 | } |
67c8308c | 1154 | |
cc192b50 | 1155 | debugs(15, 8, "neighborUp: UP: " << p->host << " (" << p->in_addr << ")"); |
03b82057 | 1156 | return 1; |
5269d0bd | 1157 | } |
1158 | ||
e6e3b09b | 1159 | void |
28c60158 | 1160 | peerDestroy(void *data) |
e6e3b09b | 1161 | { |
a3c6762c | 1162 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1163 | |
b69f7771 | 1164 | if (p == NULL) |
62e76326 | 1165 | return; |
1166 | ||
b802d2cb | 1167 | CachePeerDomainList *nl = NULL; |
b115733c | 1168 | |
b802d2cb | 1169 | for (CachePeerDomainList *l = p->peer_domain; l; l = nl) { |
62e76326 | 1170 | nl = l->next; |
1171 | safe_free(l->domain); | |
b115733c | 1172 | xfree(l); |
ee4a1f5d | 1173 | } |
62e76326 | 1174 | |
b69f7771 | 1175 | safe_free(p->host); |
be753325 | 1176 | safe_free(p->name); |
1177 | safe_free(p->domain); | |
e13ee7ad | 1178 | #if USE_CACHE_DIGESTS |
62e76326 | 1179 | |
fa80a8ef | 1180 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1181 | #endif |
e6e3b09b | 1182 | } |
c7a3724d | 1183 | |
e13ee7ad | 1184 | void |
a3c6762c | 1185 | peerNoteDigestGone(CachePeer * p) |
e13ee7ad | 1186 | { |
1187 | #if USE_CACHE_DIGESTS | |
fa80a8ef | 1188 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1189 | #endif |
1190 | } | |
1191 | ||
dd4bd44e | 1192 | static void |
3ff65596 | 1193 | peerDNSConfigure(const ipcache_addrs *ia, const DnsLookupDetails &, void *data) |
dd4bd44e | 1194 | { |
a3c6762c | 1195 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1196 | |
dd4bd44e | 1197 | int j; |
62e76326 | 1198 | |
b69f7771 | 1199 | if (p->n_addresses == 0) { |
e0236918 | 1200 | debugs(15, DBG_IMPORTANT, "Configuring " << neighborTypeStr(p) << " " << p->host << "/" << p->http_port << "/" << p->icp.port); |
62e76326 | 1201 | |
1202 | if (p->type == PEER_MULTICAST) | |
e0236918 | 1203 | debugs(15, DBG_IMPORTANT, " Multicast TTL = " << p->mcast.ttl); |
b69f7771 | 1204 | } |
62e76326 | 1205 | |
b69f7771 | 1206 | p->n_addresses = 0; |
62e76326 | 1207 | |
dd4bd44e | 1208 | if (ia == NULL) { |
fa84c01d | 1209 | debugs(0, DBG_CRITICAL, "WARNING: DNS lookup for '" << p->host << "' failed!"); |
62e76326 | 1210 | return; |
dd4bd44e | 1211 | } |
62e76326 | 1212 | |
c04fe656 | 1213 | if ((int) ia->count < 1) { |
fa84c01d | 1214 | debugs(0, DBG_CRITICAL, "WARNING: No IP address found for '" << p->host << "'!"); |
62e76326 | 1215 | return; |
dd4bd44e | 1216 | } |
62e76326 | 1217 | |
ff9970cc | 1218 | p->tcp_up = p->connect_fail_limit; |
dc3a5177 | 1219 | |
5db6bf73 | 1220 | for (j = 0; j < (int) ia->count && j < PEER_MAX_ADDRESSES; ++j) { |
62e76326 | 1221 | p->addresses[j] = ia->in_addrs[j]; |
cc192b50 | 1222 | debugs(15, 2, "--> IP address #" << j << ": " << p->addresses[j]); |
5db6bf73 | 1223 | ++ p->n_addresses; |
dd4bd44e | 1224 | } |
62e76326 | 1225 | |
cc192b50 | 1226 | p->in_addr.SetEmpty(); |
1227 | p->in_addr = p->addresses[0]; | |
1228 | p->in_addr.SetPort(p->icp.port); | |
62e76326 | 1229 | |
b69f7771 | 1230 | if (p->type == PEER_MULTICAST) |
62e76326 | 1231 | peerCountMcastPeersSchedule(p, 10); |
1232 | ||
9b5c4a9a | 1233 | #if USE_ICMP |
1a827bc0 | 1234 | if (p->type != PEER_MULTICAST) |
62e76326 | 1235 | if (!p->options.no_netdb_exchange) |
1236 | eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1); | |
9b5c4a9a AJ |
1237 | #endif |
1238 | ||
dd4bd44e | 1239 | } |
1240 | ||
1241 | static void | |
51242273 | 1242 | peerRefreshDNS(void *data) |
dd4bd44e | 1243 | { |
a3c6762c | 1244 | CachePeer *p = NULL; |
62e76326 | 1245 | |
46ca5fc6 | 1246 | if (eventFind(peerRefreshDNS, NULL)) |
62e76326 | 1247 | eventDelete(peerRefreshDNS, NULL); |
1248 | ||
51242273 | 1249 | if (!data && 0 == stat5minClientRequests()) { |
62e76326 | 1250 | /* no recent client traffic, wait a bit */ |
1251 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 180.0, 1); | |
1252 | return; | |
dd4bd44e | 1253 | } |
62e76326 | 1254 | |
1f3c4622 | 1255 | for (p = Config.peers; p; p = p->next) |
62e76326 | 1256 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); |
1257 | ||
dd4bd44e | 1258 | /* Reconfigure the peers every hour */ |
52040193 | 1259 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 3600.0, 1); |
dd4bd44e | 1260 | } |
e924600d | 1261 | |
4ed0e075 | 1262 | static void |
a3c6762c | 1263 | peerConnectFailedSilent(CachePeer * p) |
eb406bb7 | 1264 | { |
1265 | p->stats.last_connect_failure = squid_curtime; | |
62e76326 | 1266 | |
eb406bb7 | 1267 | if (!p->tcp_up) { |
bf8fe701 | 1268 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << |
1269 | " dead"); | |
62e76326 | 1270 | return; |
eb406bb7 | 1271 | } |
62e76326 | 1272 | |
5e263176 | 1273 | -- p->tcp_up; |
62e76326 | 1274 | |
eb406bb7 | 1275 | if (!p->tcp_up) { |
e0236918 | 1276 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 1277 | p->stats.logged_state = PEER_DEAD; |
eb406bb7 | 1278 | } |
1279 | } | |
1280 | ||
4ed0e075 | 1281 | void |
a3c6762c | 1282 | peerConnectFailed(CachePeer *p) |
4ed0e075 | 1283 | { |
e0236918 | 1284 | debugs(15, DBG_IMPORTANT, "TCP connection to " << p->host << "/" << p->http_port << " failed"); |
4ed0e075 | 1285 | peerConnectFailedSilent(p); |
1286 | } | |
1287 | ||
eb406bb7 | 1288 | void |
a3c6762c | 1289 | peerConnectSucceded(CachePeer * p) |
eb406bb7 | 1290 | { |
1291 | if (!p->tcp_up) { | |
bf8fe701 | 1292 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << " succeded"); |
ff9970cc | 1293 | p->tcp_up = p->connect_fail_limit; // NP: so peerAlive(p) works properly. |
32a47e3e | 1294 | peerAlive(p); |
26ac0430 AJ |
1295 | if (!p->n_addresses) |
1296 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); | |
1297 | } else | |
ff9970cc | 1298 | p->tcp_up = p->connect_fail_limit; |
eb406bb7 | 1299 | } |
1300 | ||
4ed0e075 | 1301 | /* |
26ac0430 | 1302 | * peerProbeConnect will be called on dead peers by neighborUp |
4ed0e075 | 1303 | */ |
cfd66529 | 1304 | static bool |
a3c6762c | 1305 | peerProbeConnect(CachePeer * p) |
e924600d | 1306 | { |
cfd66529 AJ |
1307 | time_t ctimeout = p->connect_timeout > 0 ? p->connect_timeout : Config.Timeout.peer_connect; |
1308 | bool ret = (squid_curtime - p->stats.last_connect_failure) > (ctimeout * 10); | |
62e76326 | 1309 | |
aed188fd | 1310 | if (p->testing_now > 0) |
4ed0e075 | 1311 | return ret;/* probe already running */ |
62e76326 | 1312 | |
4ed0e075 | 1313 | if (squid_curtime - p->stats.last_connect_probe == 0) |
1314 | return ret;/* don't probe to often */ | |
62e76326 | 1315 | |
a3c6762c | 1316 | /* for each IP address of this CachePeer. find one that we can connect to and probe it. */ |
5db6bf73 | 1317 | for (int i = 0; i < p->n_addresses; ++i) { |
f9b72e0c | 1318 | Comm::ConnectionPointer conn = new Comm::Connection; |
cfd66529 AJ |
1319 | conn->remote = p->addresses[i]; |
1320 | conn->remote.SetPort(p->http_port); | |
1321 | getOutgoingAddress(NULL, conn); | |
cc192b50 | 1322 | |
5db6bf73 | 1323 | ++ p->testing_now; |
715b5def | 1324 | |
aed188fd | 1325 | AsyncCall::Pointer call = commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone, p)); |
4accd6d8 | 1326 | Comm::ConnOpener *cs = new Comm::ConnOpener(conn, call, ctimeout); |
aed188fd | 1327 | cs->setHost(p->host); |
855150a4 | 1328 | AsyncJob::Start(cs); |
715b5def AJ |
1329 | } |
1330 | ||
eb406bb7 | 1331 | p->stats.last_connect_probe = squid_curtime; |
62e76326 | 1332 | |
4ed0e075 | 1333 | return ret; |
e924600d | 1334 | } |
1335 | ||
1336 | static void | |
f01d4b80 | 1337 | peerProbeConnectDone(const Comm::ConnectionPointer &conn, comm_err_t status, int xerrno, void *data) |
e924600d | 1338 | { |
a3c6762c | 1339 | CachePeer *p = (CachePeer*)data; |
62e76326 | 1340 | |
98829f69 | 1341 | if (status == COMM_OK) { |
62e76326 | 1342 | peerConnectSucceded(p); |
e924600d | 1343 | } else { |
4ed0e075 | 1344 | peerConnectFailedSilent(p); |
e924600d | 1345 | } |
62e76326 | 1346 | |
5e263176 | 1347 | -- p->testing_now; |
db9bf30d AJ |
1348 | conn->close(); |
1349 | // TODO: log this traffic. | |
e924600d | 1350 | } |
1351 | ||
429fdbec | 1352 | static void |
a3c6762c | 1353 | peerCountMcastPeersSchedule(CachePeer * p, time_t when) |
429fdbec | 1354 | { |
b515fc11 | 1355 | if (p->mcast.flags.count_event_pending) |
62e76326 | 1356 | return; |
1357 | ||
429fdbec | 1358 | eventAdd("peerCountMcastPeersStart", |
62e76326 | 1359 | peerCountMcastPeersStart, |
1360 | p, | |
1361 | (double) when, 1); | |
1362 | ||
b515fc11 | 1363 | p->mcast.flags.count_event_pending = 1; |
429fdbec | 1364 | } |
1365 | ||
1366 | static void | |
1367 | peerCountMcastPeersStart(void *data) | |
1368 | { | |
a3c6762c | 1369 | CachePeer *p = (CachePeer *)data; |
28c60158 | 1370 | ps_state *psstate; |
429fdbec | 1371 | StoreEntry *fake; |
1372 | MemObject *mem; | |
1373 | icp_common_t *query; | |
007b8be4 | 1374 | int reqnum; |
429fdbec | 1375 | LOCAL_ARRAY(char, url, MAX_URL); |
ce66013b | 1376 | assert(p->type == PEER_MULTICAST); |
b515fc11 | 1377 | p->mcast.flags.count_event_pending = 0; |
cc192b50 | 1378 | snprintf(url, MAX_URL, "http://"); |
1379 | p->in_addr.ToURL(url+7, MAX_URL -8 ); | |
1380 | strcat(url, "/"); | |
c2a7cefd | 1381 | fake = storeCreateEntry(url, url, RequestFlags(), Http::METHOD_GET); |
c21ad0f5 | 1382 | HttpRequest *req = HttpRequest::CreateFromUrl(url); |
b24880fe | 1383 | psstate = new ps_state; |
6dd9f4bd | 1384 | psstate->request = HTTPMSGLOCK(req); |
429fdbec | 1385 | psstate->entry = fake; |
1386 | psstate->callback = NULL; | |
99117d82 | 1387 | psstate->callback_data = cbdataReference(p); |
b4e7f82d | 1388 | psstate->ping.start = current_time; |
429fdbec | 1389 | mem = fake->mem_obj; |
6dd9f4bd | 1390 | mem->request = HTTPMSGLOCK(psstate->request); |
429fdbec | 1391 | mem->start_ping = current_time; |
b4e7f82d | 1392 | mem->ping_reply_callback = peerCountHandleIcpReply; |
429fdbec | 1393 | mem->ircb_data = psstate; |
e0d28505 | 1394 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
007b8be4 | 1395 | p->mcast.id = mem->id; |
332dafa2 | 1396 | reqnum = icpSetCacheKey((const cache_key *)fake->key); |
e6ccf245 | 1397 | query = _icp_common_t::createMessage(ICP_QUERY, 0, url, reqnum, 0); |
e0d28505 | 1398 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
429fdbec | 1399 | fake->ping_status = PING_WAITING; |
1400 | eventAdd("peerCountMcastPeersDone", | |
62e76326 | 1401 | peerCountMcastPeersDone, |
1402 | psstate, | |
99117d82 | 1403 | Config.Timeout.mcast_icp_query / 1000.0, 1); |
b515fc11 | 1404 | p->mcast.flags.counting = 1; |
429fdbec | 1405 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); |
1406 | } | |
1407 | ||
1408 | static void | |
1409 | peerCountMcastPeersDone(void *data) | |
1410 | { | |
e6ccf245 | 1411 | ps_state *psstate = (ps_state *)data; |
429fdbec | 1412 | StoreEntry *fake = psstate->entry; |
99117d82 | 1413 | |
1414 | if (cbdataReferenceValid(psstate->callback_data)) { | |
a3c6762c | 1415 | CachePeer *p = (CachePeer *)psstate->callback_data; |
99117d82 | 1416 | p->mcast.flags.counting = 0; |
a98bcbee | 1417 | p->mcast.avg_n_members = Math::doubleAverage(p->mcast.avg_n_members, (double) psstate->ping.n_recv, ++p->mcast.n_times_counted, 10); |
e0236918 | 1418 | debugs(15, DBG_IMPORTANT, "Group " << p->host << ": " << psstate->ping.n_recv << |
bf8fe701 | 1419 | " replies, "<< std::setw(4)<< std::setprecision(2) << |
1420 | p->mcast.avg_n_members <<" average, RTT " << p->stats.rtt); | |
99117d82 | 1421 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; |
1422 | } | |
1423 | ||
1424 | cbdataReferenceDone(psstate->callback_data); | |
1425 | ||
bc52369a | 1426 | fake->abort(); // sets ENTRY_ABORTED and initiates releated cleanup |
6dd9f4bd | 1427 | HTTPMSGUNLOCK(fake->mem_obj->request); |
97b5e68f | 1428 | fake->unlock(); |
6dd9f4bd | 1429 | HTTPMSGUNLOCK(psstate->request); |
1a827bc0 | 1430 | cbdataFree(psstate); |
429fdbec | 1431 | } |
1432 | ||
1433 | static void | |
a3c6762c | 1434 | peerCountHandleIcpReply(CachePeer * p, peer_t type, AnyP::ProtocolType proto, void *hdrnotused, void *data) |
429fdbec | 1435 | { |
d1b63fc8 | 1436 | int rtt_av_factor; |
1437 | ||
e6ccf245 | 1438 | ps_state *psstate = (ps_state *)data; |
1a827bc0 | 1439 | StoreEntry *fake = psstate->entry; |
1440 | MemObject *mem = fake->mem_obj; | |
1441 | int rtt = tvSubMsec(mem->start_ping, current_time); | |
0c3d3f65 | 1442 | assert(proto == AnyP::PROTO_ICP); |
1a827bc0 | 1443 | assert(fake); |
1444 | assert(mem); | |
5db6bf73 | 1445 | ++ psstate->ping.n_recv; |
d1b63fc8 | 1446 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 1447 | |
d1b63fc8 | 1448 | if (p->options.weighted_roundrobin) |
62e76326 | 1449 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
1450 | ||
a98bcbee | 1451 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, rtt_av_factor); |
429fdbec | 1452 | } |
ed7f5615 | 1453 | |
1454 | static void | |
1455 | neighborDumpPeers(StoreEntry * sentry) | |
1456 | { | |
1457 | dump_peers(sentry, Config.peers); | |
1458 | } | |
1459 | ||
1460 | static void | |
1461 | neighborDumpNonPeers(StoreEntry * sentry) | |
1462 | { | |
1463 | dump_peers(sentry, non_peers); | |
1464 | } | |
1465 | ||
a369131d | 1466 | void |
a3c6762c | 1467 | dump_peer_options(StoreEntry * sentry, CachePeer * p) |
a369131d | 1468 | { |
cd196bc8 | 1469 | if (p->options.proxy_only) |
62e76326 | 1470 | storeAppendPrintf(sentry, " proxy-only"); |
1471 | ||
cd196bc8 | 1472 | if (p->options.no_query) |
62e76326 | 1473 | storeAppendPrintf(sentry, " no-query"); |
1474 | ||
d1b63fc8 | 1475 | if (p->options.background_ping) |
62e76326 | 1476 | storeAppendPrintf(sentry, " background-ping"); |
1477 | ||
cd196bc8 | 1478 | if (p->options.no_digest) |
62e76326 | 1479 | storeAppendPrintf(sentry, " no-digest"); |
1480 | ||
cd196bc8 | 1481 | if (p->options.default_parent) |
62e76326 | 1482 | storeAppendPrintf(sentry, " default"); |
1483 | ||
cd196bc8 | 1484 | if (p->options.roundrobin) |
62e76326 | 1485 | storeAppendPrintf(sentry, " round-robin"); |
1486 | ||
f7e1d9ce HN |
1487 | if (p->options.carp) |
1488 | storeAppendPrintf(sentry, " carp"); | |
354b5a2b | 1489 | |
2f1431ea | 1490 | #if USE_AUTH |
f7e1d9ce HN |
1491 | if (p->options.userhash) |
1492 | storeAppendPrintf(sentry, " userhash"); | |
354b5a2b | 1493 | #endif |
f7e1d9ce | 1494 | |
354b5a2b | 1495 | if (p->options.sourcehash) |
f7e1d9ce | 1496 | storeAppendPrintf(sentry, " sourcehash"); |
354b5a2b | 1497 | |
d1b63fc8 | 1498 | if (p->options.weighted_roundrobin) |
62e76326 | 1499 | storeAppendPrintf(sentry, " weighted-round-robin"); |
1500 | ||
cd196bc8 | 1501 | if (p->options.mcast_responder) |
62e76326 | 1502 | storeAppendPrintf(sentry, " multicast-responder"); |
1503 | ||
8a368316 AJ |
1504 | #if PEER_MULTICAST_SIBLINGS |
1505 | if (p->options.mcast_siblings) | |
1506 | storeAppendPrintf(sentry, " multicast-siblings"); | |
1507 | #endif | |
1508 | ||
678a066c | 1509 | if (p->weight != 1) |
62e76326 | 1510 | storeAppendPrintf(sentry, " weight=%d", p->weight); |
1511 | ||
cd196bc8 | 1512 | if (p->options.closest_only) |
62e76326 | 1513 | storeAppendPrintf(sentry, " closest-only"); |
1514 | ||
dc9d133b | 1515 | #if USE_HTCP |
18191440 | 1516 | if (p->options.htcp) { |
62e76326 | 1517 | storeAppendPrintf(sentry, " htcp"); |
18191440 AJ |
1518 | if (p->options.htcp_oldsquid || p->options.htcp_no_clr || p->options.htcp_no_purge_clr || p->options.htcp_only_clr) { |
1519 | int doneopts=0; | |
1520 | if (p->options.htcp_oldsquid) | |
1521 | storeAppendPrintf(sentry, "%soldsquid",(doneopts++>0?",":"=")); | |
1522 | if (p->options.htcp_no_clr) | |
1523 | storeAppendPrintf(sentry, "%sno-clr",(doneopts++>0?",":"=")); | |
1524 | if (p->options.htcp_no_purge_clr) | |
1525 | storeAppendPrintf(sentry, "%sno-purge-clr",(doneopts++>0?",":"=")); | |
1526 | if (p->options.htcp_only_clr) | |
1527 | storeAppendPrintf(sentry, "%sonly-clr",(doneopts++>0?",":"=")); | |
1528 | } | |
1529 | } | |
dc9d133b | 1530 | #endif |
62e76326 | 1531 | |
cd196bc8 | 1532 | if (p->options.no_netdb_exchange) |
62e76326 | 1533 | storeAppendPrintf(sentry, " no-netdb-exchange"); |
1534 | ||
9a0a18de | 1535 | #if USE_DELAY_POOLS |
cd196bc8 | 1536 | if (p->options.no_delay) |
62e76326 | 1537 | storeAppendPrintf(sentry, " no-delay"); |
95e36d02 | 1538 | #endif |
62e76326 | 1539 | |
c68e9c6b | 1540 | if (p->login) |
62e76326 | 1541 | storeAppendPrintf(sentry, " login=%s", p->login); |
1542 | ||
a369131d | 1543 | if (p->mcast.ttl > 0) |
62e76326 | 1544 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); |
1545 | ||
be753325 | 1546 | if (p->connect_timeout > 0) |
62e76326 | 1547 | storeAppendPrintf(sentry, " connect-timeout=%d", (int) p->connect_timeout); |
1548 | ||
ff9970cc AJ |
1549 | if (p->connect_fail_limit != PEER_TCP_MAGIC_COUNT) |
1550 | storeAppendPrintf(sentry, " connect-fail-limit=%d", p->connect_fail_limit); | |
1551 | ||
be753325 | 1552 | #if USE_CACHE_DIGESTS |
62e76326 | 1553 | |
be753325 | 1554 | if (p->digest_url) |
62e76326 | 1555 | storeAppendPrintf(sentry, " digest-url=%s", p->digest_url); |
1556 | ||
be753325 | 1557 | #endif |
62e76326 | 1558 | |
be753325 | 1559 | if (p->options.allow_miss) |
62e76326 | 1560 | storeAppendPrintf(sentry, " allow-miss"); |
1561 | ||
b0758e04 AJ |
1562 | if (p->options.no_tproxy) |
1563 | storeAppendPrintf(sentry, " no-tproxy"); | |
1564 | ||
be753325 | 1565 | if (p->max_conn > 0) |
62e76326 | 1566 | storeAppendPrintf(sentry, " max-conn=%d", p->max_conn); |
1567 | ||
be753325 | 1568 | if (p->options.originserver) |
62e76326 | 1569 | storeAppendPrintf(sentry, " originserver"); |
1570 | ||
be753325 | 1571 | if (p->domain) |
62e76326 | 1572 | storeAppendPrintf(sentry, " forceddomain=%s", p->domain); |
1573 | ||
26ac0430 AJ |
1574 | if (p->connection_auth == 0) |
1575 | storeAppendPrintf(sentry, " connection-auth=off"); | |
1576 | else if (p->connection_auth == 1) | |
1577 | storeAppendPrintf(sentry, " connection-auth=on"); | |
1578 | else if (p->connection_auth == 2) | |
1579 | storeAppendPrintf(sentry, " connection-auth=auto"); | |
d67acb4e | 1580 | |
a369131d | 1581 | storeAppendPrintf(sentry, "\n"); |
1582 | } | |
1583 | ||
ed7f5615 | 1584 | static void |
a3c6762c | 1585 | dump_peers(StoreEntry * sentry, CachePeer * peers) |
ed7f5615 | 1586 | { |
a3c6762c | 1587 | CachePeer *e = NULL; |
cc192b50 | 1588 | char ntoabuf[MAX_IPSTRLEN]; |
b802d2cb | 1589 | CachePeerDomainList *d = NULL; |
ed7f5615 | 1590 | icp_opcode op; |
06e6d12a | 1591 | int i; |
62e76326 | 1592 | |
ed7f5615 | 1593 | if (peers == NULL) |
62e76326 | 1594 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); |
1595 | ||
ed7f5615 | 1596 | for (e = peers; e; e = e->next) { |
62e76326 | 1597 | assert(e->host != NULL); |
1598 | storeAppendPrintf(sentry, "\n%-11.11s: %s\n", | |
1599 | neighborTypeStr(e), | |
1600 | e->name); | |
1601 | storeAppendPrintf(sentry, "Host : %s/%d/%d\n", | |
1602 | e->host, | |
1603 | e->http_port, | |
1604 | e->icp.port); | |
1605 | storeAppendPrintf(sentry, "Flags :"); | |
1606 | dump_peer_options(sentry, e); | |
1607 | ||
5db6bf73 | 1608 | for (i = 0; i < e->n_addresses; ++i) { |
62e76326 | 1609 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, |
cc192b50 | 1610 | e->addresses[i].NtoA(ntoabuf,MAX_IPSTRLEN) ); |
62e76326 | 1611 | } |
1612 | ||
1613 | storeAppendPrintf(sentry, "Status : %s\n", | |
1614 | neighborUp(e) ? "Up" : "Down"); | |
1615 | storeAppendPrintf(sentry, "FETCHES : %d\n", e->stats.fetches); | |
1616 | storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open); | |
1617 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
1618 | ||
1619 | if (!e->options.no_query) { | |
1620 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", | |
1621 | (int) (squid_curtime - e->stats.last_query)); | |
1622 | ||
1623 | if (e->stats.last_reply > 0) | |
1624 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1625 | (int) (squid_curtime - e->stats.last_reply)); | |
1626 | else | |
1627 | storeAppendPrintf(sentry, "LAST REPLY : none received\n"); | |
1628 | ||
1629 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1630 | ||
1631 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1632 | e->stats.pings_acked, | |
a98bcbee | 1633 | Math::intPercent(e->stats.pings_acked, e->stats.pings_sent)); |
62e76326 | 1634 | } |
1635 | ||
a98bcbee | 1636 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", e->stats.ignored_replies, Math::intPercent(e->stats.ignored_replies, e->stats.pings_acked)); |
62e76326 | 1637 | |
1638 | if (!e->options.no_query) { | |
1639 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1994bb24 | 1640 | #if USE_HTCP |
62e76326 | 1641 | |
1642 | if (e->options.htcp) { | |
1643 | storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n", | |
1644 | e->htcp.counts[0], | |
a98bcbee | 1645 | Math::intPercent(e->htcp.counts[0], e->stats.pings_acked)); |
62e76326 | 1646 | storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n", |
1647 | e->htcp.counts[1], | |
a98bcbee | 1648 | Math::intPercent(e->htcp.counts[1], e->stats.pings_acked)); |
62e76326 | 1649 | } else { |
1994bb24 | 1650 | #endif |
62e76326 | 1651 | |
1652 | for (op = ICP_INVALID; op < ICP_END; ++op) { | |
1653 | if (e->icp.counts[op] == 0) | |
1654 | continue; | |
1655 | ||
1656 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1657 | icp_opcode_str[op], | |
1658 | e->icp.counts[op], | |
a98bcbee | 1659 | Math::intPercent(e->icp.counts[op], e->stats.pings_acked)); |
62e76326 | 1660 | } |
1661 | ||
1994bb24 | 1662 | #if USE_HTCP |
62e76326 | 1663 | |
1664 | } | |
1665 | ||
1994bb24 | 1666 | #endif |
62e76326 | 1667 | |
1668 | } | |
1669 | ||
1670 | if (e->stats.last_connect_failure) { | |
1671 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", | |
20efa1c2 | 1672 | Time::FormatHttpd(e->stats.last_connect_failure)); |
62e76326 | 1673 | } |
1674 | ||
1675 | if (e->peer_domain != NULL) { | |
1676 | storeAppendPrintf(sentry, "DOMAIN LIST: "); | |
1677 | ||
1678 | for (d = e->peer_domain; d; d = d->next) { | |
1679 | storeAppendPrintf(sentry, "%s%s ", | |
1680 | d->do_ping ? null_string : "!", d->domain); | |
1681 | } | |
1682 | ||
1683 | storeAppendPrintf(sentry, "\n"); | |
1684 | } | |
1685 | ||
a98bcbee | 1686 | storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", Math::intPercent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); |
ed7f5615 | 1687 | } |
1688 | } | |
86aebcda | 1689 | |
1690 | #if USE_HTCP | |
1691 | void | |
b7ac5457 | 1692 | neighborsHtcpReply(const cache_key * key, htcpReplyData * htcp, const Ip::Address &from) |
86aebcda | 1693 | { |
53525d53 | 1694 | StoreEntry *e = Store::Root().get(key); |
399cabec | 1695 | MemObject *mem = NULL; |
a3c6762c | 1696 | CachePeer *p; |
399cabec | 1697 | peer_t ntype = PEER_NONE; |
26ac0430 AJ |
1698 | debugs(15, 6, "neighborsHtcpReply: " << |
1699 | (htcp->hit ? "HIT" : "MISS") << " " << | |
1700 | storeKeyText(key) ); | |
62e76326 | 1701 | |
88e13392 | 1702 | if (NULL != e) |
62e76326 | 1703 | mem = e->mem_obj; |
1704 | ||
399cabec | 1705 | if ((p = whichPeer(from))) |
62e76326 | 1706 | neighborAliveHtcp(p, mem, htcp); |
1707 | ||
399cabec | 1708 | /* Does the entry exist? */ |
26ac0430 | 1709 | if (NULL == e) { |
bf8fe701 | 1710 | debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1711 | neighborCountIgnored(p); |
1712 | return; | |
399cabec | 1713 | } |
62e76326 | 1714 | |
399cabec | 1715 | /* check if someone is already fetching it */ |
26ac0430 | 1716 | if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1717 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1718 | neighborCountIgnored(p); |
1719 | return; | |
399cabec | 1720 | } |
62e76326 | 1721 | |
26ac0430 | 1722 | if (mem == NULL) { |
bf8fe701 | 1723 | debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1724 | neighborCountIgnored(p); |
1725 | return; | |
399cabec | 1726 | } |
62e76326 | 1727 | |
26ac0430 | 1728 | if (e->ping_status != PING_WAITING) { |
bf8fe701 | 1729 | debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key) << " is not PING_WAITING"); |
62e76326 | 1730 | neighborCountIgnored(p); |
1731 | return; | |
399cabec | 1732 | } |
62e76326 | 1733 | |
26ac0430 | 1734 | if (e->lock_count == 0) { |
5bd484b5 | 1735 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1736 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1737 | neighborCountIgnored(p); |
1738 | return; | |
399cabec | 1739 | } |
62e76326 | 1740 | |
26ac0430 | 1741 | if (p) { |
62e76326 | 1742 | ntype = neighborType(p, mem->request); |
1743 | neighborUpdateRtt(p, mem); | |
44f2f2e4 | 1744 | } |
62e76326 | 1745 | |
26ac0430 | 1746 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1747 | neighborCountIgnored(p); |
1748 | return; | |
399cabec | 1749 | } |
62e76326 | 1750 | |
bf8fe701 | 1751 | debugs(15, 3, "neighborsHtcpReply: e = " << e); |
0c3d3f65 | 1752 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_HTCP, htcp, mem->ircb_data); |
86aebcda | 1753 | } |
62e76326 | 1754 | |
1bd06eff BR |
1755 | /* |
1756 | * Send HTCP CLR messages to all peers configured to receive them. | |
1757 | */ | |
4f4fa815 | 1758 | void |
8dceeee3 | 1759 | neighborsHtcpClear(StoreEntry * e, const char *uri, HttpRequest * req, const HttpRequestMethod &method, htcp_clr_reason reason) |
4f4fa815 | 1760 | { |
a3c6762c | 1761 | CachePeer *p; |
4f4fa815 BR |
1762 | char buf[128]; |
1763 | ||
4f4fa815 BR |
1764 | for (p = Config.peers; p; p = p->next) { |
1765 | if (!p->options.htcp) { | |
1766 | continue; | |
1767 | } | |
1768 | if (p->options.htcp_no_clr) { | |
1769 | continue; | |
1770 | } | |
1771 | if (p->options.htcp_no_purge_clr && reason == HTCP_CLR_PURGE) { | |
1772 | continue; | |
1773 | } | |
1bd06eff | 1774 | debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p->in_addr.ToURL(buf, 128)); |
4f4fa815 BR |
1775 | htcpClear(e, uri, req, method, p, reason); |
1776 | } | |
1777 | } | |
1778 | ||
86aebcda | 1779 | #endif |