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22f3fd98 | 1 | |
30a4f2a8 | 2 | /* |
43af4d27 | 3 | * $Id: neighbors.cc,v 1.300 2002/04/07 03:35:30 hno Exp $ |
30a4f2a8 | 4 | * |
5 | * DEBUG: section 15 Neighbor Routines | |
6 | * AUTHOR: Harvest Derived | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
30a4f2a8 | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
019dd986 | 34 | */ |
090089c4 | 35 | |
44a47c6e | 36 | #include "squid.h" |
090089c4 | 37 | |
429fdbec | 38 | /* count mcast group peers every 15 minutes */ |
39 | #define MCAST_COUNT_RATE 900 | |
40 | ||
f5b8bbc4 | 41 | static int peerAllowedToUse(const peer *, request_t *); |
f5b8bbc4 | 42 | static int peerWouldBePinged(const peer *, request_t *); |
43 | static void neighborRemove(peer *); | |
f5b8bbc4 | 44 | static void neighborAlive(peer *, const MemObject *, const icp_common_t *); |
399cabec | 45 | #if USE_HTCP |
46 | static void neighborAliveHtcp(peer *, const MemObject *, const htcpReplyData *); | |
47 | #endif | |
56b62ecc | 48 | static void neighborCountIgnored(peer *); |
f5b8bbc4 | 49 | static void peerRefreshDNS(void *); |
b69f7771 | 50 | static IPH peerDNSConfigure; |
eb406bb7 | 51 | static void peerProbeConnect(peer *); |
52 | static IPH peerProbeConnect2; | |
53 | static CNCB peerProbeConnectDone; | |
f5b8bbc4 | 54 | static void peerCountMcastPeersDone(void *data); |
55 | static void peerCountMcastPeersStart(void *data); | |
56 | static void peerCountMcastPeersSchedule(peer * p, time_t when); | |
b3264694 | 57 | static IRCB peerCountHandleIcpReply; |
f5b8bbc4 | 58 | static void neighborIgnoreNonPeer(const struct sockaddr_in *, icp_opcode); |
ed7f5615 | 59 | static OBJH neighborDumpPeers; |
60 | static OBJH neighborDumpNonPeers; | |
61 | static void dump_peers(StoreEntry * sentry, peer * peers); | |
090089c4 | 62 | |
090089c4 | 63 | static icp_common_t echo_hdr; |
30a4f2a8 | 64 | static u_short echo_port; |
30a4f2a8 | 65 | |
c7a3724d | 66 | static int NLateReplies = 0; |
40a1495e | 67 | static peer *first_ping = NULL; |
28070024 | 68 | |
a2c963ae | 69 | const char * |
b69f7771 | 70 | neighborTypeStr(const peer * p) |
69a71bd7 | 71 | { |
e102ebda | 72 | if (p->type == PEER_NONE) |
73 | return "Non-Peer"; | |
b69f7771 | 74 | if (p->type == PEER_SIBLING) |
69a71bd7 | 75 | return "Sibling"; |
b69f7771 | 76 | if (p->type == PEER_MULTICAST) |
7b3bd12c | 77 | return "Multicast Group"; |
69a71bd7 | 78 | return "Parent"; |
79 | } | |
80 | ||
090089c4 | 81 | |
d9f9d78b | 82 | peer * |
0cdcddb9 | 83 | whichPeer(const struct sockaddr_in * from) |
090089c4 | 84 | { |
22e4fa85 | 85 | int j; |
4eda6afe | 86 | u_short port = ntohs(from->sin_port); |
87 | struct in_addr ip = from->sin_addr; | |
b69f7771 | 88 | peer *p = NULL; |
a3d5953d | 89 | debug(15, 3) ("whichPeer: from %s port %d\n", inet_ntoa(ip), port); |
40a1495e | 90 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 91 | for (j = 0; j < p->n_addresses; j++) { |
399cabec | 92 | if (ip.s_addr == p->addresses[j].s_addr && port == p->icp.port) { |
b69f7771 | 93 | return p; |
090089c4 | 94 | } |
95 | } | |
96 | } | |
4eda6afe | 97 | return NULL; |
090089c4 | 98 | } |
99 | ||
701a8572 | 100 | peer_t |
b69f7771 | 101 | neighborType(const peer * p, const request_t * request) |
24a1003d | 102 | { |
b012353a | 103 | const struct _domain_type *d = NULL; |
b69f7771 | 104 | for (d = p->typelist; d; d = d->next) { |
7e3ce7b9 | 105 | if (0 == matchDomainName(request->host, d->domain)) |
deb79f06 | 106 | if (d->type != PEER_NONE) |
b012353a | 107 | return d->type; |
24a1003d | 108 | } |
b69f7771 | 109 | return p->type; |
24a1003d | 110 | } |
111 | ||
7b3bd12c | 112 | /* |
62fd6124 | 113 | * peerAllowedToUse |
7b3bd12c | 114 | * |
dd4bd44e | 115 | * this function figures out if it is appropriate to fetch REQUEST |
62fd6124 | 116 | * from PEER. |
7b3bd12c | 117 | */ |
b8d8561b | 118 | static int |
b69f7771 | 119 | peerAllowedToUse(const peer * p, request_t * request) |
090089c4 | 120 | { |
b012353a | 121 | const struct _domain_ping *d = NULL; |
090089c4 | 122 | int do_ping = 1; |
f88bb09c | 123 | aclCheck_t checklist; |
ce66013b | 124 | assert(request != NULL); |
9689d97c | 125 | if (neighborType(p, request) == PEER_SIBLING) { |
126 | if (request->flags.nocache) | |
24a1003d | 127 | return 0; |
9689d97c | 128 | if (request->flags.refresh) |
d950cec8 | 129 | return 0; |
9689d97c | 130 | if (request->flags.loopdetect) |
131 | return 0; | |
132 | if (request->flags.need_validation) | |
133 | return 0; | |
134 | } | |
b6a2f15e | 135 | if (p->peer_domain == NULL && p->access == NULL) |
090089c4 | 136 | return do_ping; |
090089c4 | 137 | do_ping = 0; |
b6a2f15e | 138 | for (d = p->peer_domain; d; d = d->next) { |
7e3ce7b9 | 139 | if (0 == matchDomainName(request->host, d->domain)) { |
130faaed | 140 | do_ping = d->do_ping; |
141 | break; | |
142 | } | |
30a4f2a8 | 143 | do_ping = !d->do_ping; |
144 | } | |
b6a2f15e | 145 | if (p->peer_domain && 0 == do_ping) |
130faaed | 146 | return do_ping; |
505e35db | 147 | if (p->access == NULL) |
148 | return do_ping; | |
d20b1cd0 | 149 | memset(&checklist, '\0', sizeof(checklist)); |
8ae8bb05 | 150 | checklist.src_addr = request->client_addr; |
3c11d1f5 | 151 | checklist.my_addr = request->my_addr; |
7e3ce7b9 | 152 | checklist.my_port = request->my_port; |
f88bb09c | 153 | checklist.request = request; |
4749aee5 | 154 | #if 0 && USE_IDENT |
155 | /* | |
156 | * this is currently broken because 'request->user_ident' has been | |
157 | * moved to conn->rfc931 and we don't have access to the parent | |
158 | * ConnStateData here. | |
159 | */ | |
94e7025e | 160 | if (request->user_ident[0]) |
4749aee5 | 161 | xstrncpy(checklist.rfc931, request->user_ident, USER_IDENT_SZ); |
94e7025e | 162 | #endif |
505e35db | 163 | return aclCheckFast(p->access, &checklist); |
090089c4 | 164 | } |
165 | ||
62fd6124 | 166 | /* Return TRUE if it is okay to send an ICP request to this peer. */ |
167 | static int | |
b69f7771 | 168 | peerWouldBePinged(const peer * p, request_t * request) |
62fd6124 | 169 | { |
b69f7771 | 170 | if (!peerAllowedToUse(p, request)) |
62fd6124 | 171 | return 0; |
cd196bc8 | 172 | if (p->options.no_query) |
62fd6124 | 173 | return 0; |
cd196bc8 | 174 | if (p->options.mcast_responder) |
62fd6124 | 175 | return 0; |
83b381d5 | 176 | if (p->n_addresses == 0) |
177 | return 0; | |
0e614a06 | 178 | if (p->icp.port == 0) |
179 | return 0; | |
62fd6124 | 180 | /* the case below seems strange, but can happen if the |
181 | * URL host is on the other side of a firewall */ | |
b69f7771 | 182 | if (p->type == PEER_SIBLING) |
92695e5e | 183 | if (!request->flags.hierarchical) |
62fd6124 | 184 | return 0; |
83b381d5 | 185 | /* Ping dead peers every timeout interval */ |
186 | if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) | |
187 | return 1; | |
188 | if (!neighborUp(p)) | |
dd4bd44e | 189 | return 0; |
62fd6124 | 190 | return 1; |
191 | } | |
192 | ||
193 | /* Return TRUE if it is okay to send an HTTP request to this peer. */ | |
8ff4505b | 194 | int |
b69f7771 | 195 | peerHTTPOkay(const peer * p, request_t * request) |
62fd6124 | 196 | { |
b69f7771 | 197 | if (!peerAllowedToUse(p, request)) |
62fd6124 | 198 | return 0; |
b69f7771 | 199 | if (!neighborUp(p)) |
62fd6124 | 200 | return 0; |
c7f9eb6d | 201 | if (p->max_conn) |
202 | if (p->stats.conn_open >= p->max_conn) | |
203 | return 0; | |
62fd6124 | 204 | return 1; |
205 | } | |
206 | ||
3c6e634f | 207 | int |
208 | neighborsCount(request_t * request) | |
090089c4 | 209 | { |
b69f7771 | 210 | peer *p = NULL; |
090089c4 | 211 | int count = 0; |
40a1495e | 212 | for (p = Config.peers; p; p = p->next) |
b69f7771 | 213 | if (peerWouldBePinged(p, request)) |
3c6e634f | 214 | count++; |
a3d5953d | 215 | debug(15, 3) ("neighborsCount: %d\n", count); |
3c6e634f | 216 | return count; |
217 | } | |
090089c4 | 218 | |
deb79f06 | 219 | peer * |
3c6e634f | 220 | getSingleParent(request_t * request) |
221 | { | |
deb79f06 | 222 | peer *p = NULL; |
b69f7771 | 223 | peer *q = NULL; |
40a1495e | 224 | for (q = Config.peers; q; q = q->next) { |
b69f7771 | 225 | if (!peerHTTPOkay(q, request)) |
caebbe00 | 226 | continue; |
b69f7771 | 227 | if (neighborType(q, request) != PEER_PARENT) |
3c6e634f | 228 | return NULL; /* oops, found SIBLING */ |
229 | if (p) | |
230 | return NULL; /* oops, found second parent */ | |
b69f7771 | 231 | p = q; |
090089c4 | 232 | } |
cd196bc8 | 233 | if (p != NULL && !p->options.no_query) |
a369131d | 234 | return NULL; |
a3d5953d | 235 | debug(15, 3) ("getSingleParent: returning %s\n", p ? p->host : "NULL"); |
3c6e634f | 236 | return p; |
090089c4 | 237 | } |
238 | ||
deb79f06 | 239 | peer * |
b8d8561b | 240 | getFirstUpParent(request_t * request) |
090089c4 | 241 | { |
b69f7771 | 242 | peer *p = NULL; |
40a1495e | 243 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 244 | if (!neighborUp(p)) |
30a4f2a8 | 245 | continue; |
b69f7771 | 246 | if (neighborType(p, request) != PEER_PARENT) |
090089c4 | 247 | continue; |
b69f7771 | 248 | if (!peerHTTPOkay(p, request)) |
e924600d | 249 | continue; |
250 | break; | |
090089c4 | 251 | } |
a3d5953d | 252 | debug(15, 3) ("getFirstUpParent: returning %s\n", p ? p->host : "NULL"); |
b69f7771 | 253 | return p; |
090089c4 | 254 | } |
255 | ||
deb79f06 | 256 | peer * |
48b38d01 | 257 | getRoundRobinParent(request_t * request) |
258 | { | |
b69f7771 | 259 | peer *p; |
260 | peer *q = NULL; | |
40a1495e | 261 | for (p = Config.peers; p; p = p->next) { |
cd196bc8 | 262 | if (!p->options.roundrobin) |
0c8177e6 | 263 | continue; |
b69f7771 | 264 | if (neighborType(p, request) != PEER_PARENT) |
0c8177e6 | 265 | continue; |
b69f7771 | 266 | if (!peerHTTPOkay(p, request)) |
48b38d01 | 267 | continue; |
b69f7771 | 268 | if (q && q->rr_count < p->rr_count) |
48b38d01 | 269 | continue; |
b69f7771 | 270 | q = p; |
48b38d01 | 271 | } |
b69f7771 | 272 | if (q) |
273 | q->rr_count++; | |
a3d5953d | 274 | debug(15, 3) ("getRoundRobinParent: returning %s\n", q ? q->host : "NULL"); |
b69f7771 | 275 | return q; |
48b38d01 | 276 | } |
277 | ||
82056f1e | 278 | /* This gets called every 5 minutes to clear the round-robin counter. */ |
279 | void | |
280 | peerClearRR(void *data) | |
281 | { | |
282 | peer *p = data; | |
283 | p->rr_count -= p->rr_lastcount; | |
284 | if (p->rr_count < 0) | |
285 | p->rr_count = 0; | |
286 | p->rr_lastcount = p->rr_count; | |
44a5f25e | 287 | eventAdd("peerClearRR", peerClearRR, p, 5 * 60.0, 0); |
82056f1e | 288 | } |
289 | ||
deb79f06 | 290 | peer * |
5269d0bd | 291 | getDefaultParent(request_t * request) |
292 | { | |
b69f7771 | 293 | peer *p = NULL; |
40a1495e | 294 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 295 | if (neighborType(p, request) != PEER_PARENT) |
5269d0bd | 296 | continue; |
cd196bc8 | 297 | if (!p->options.default_parent) |
5269d0bd | 298 | continue; |
b69f7771 | 299 | if (!peerHTTPOkay(p, request)) |
5269d0bd | 300 | continue; |
a3d5953d | 301 | debug(15, 3) ("getDefaultParent: returning %s\n", p->host); |
b69f7771 | 302 | return p; |
5269d0bd | 303 | } |
669fefd4 | 304 | debug(15, 3) ("getDefaultParent: returning NULL\n"); |
5269d0bd | 305 | return NULL; |
306 | } | |
307 | ||
6a655df0 | 308 | peer * |
309 | getAnyParent(request_t * request) | |
310 | { | |
311 | peer *p = NULL; | |
312 | for (p = Config.peers; p; p = p->next) { | |
313 | if (neighborType(p, request) != PEER_PARENT) | |
314 | continue; | |
315 | if (!peerHTTPOkay(p, request)) | |
316 | continue; | |
317 | debug(15, 3) ("getAnyParent: returning %s\n", p->host); | |
318 | return p; | |
319 | } | |
320 | debug(15, 3) ("getAnyParent: returning NULL\n"); | |
321 | return NULL; | |
322 | } | |
323 | ||
deb79f06 | 324 | peer * |
b69f7771 | 325 | getNextPeer(peer * p) |
090089c4 | 326 | { |
b69f7771 | 327 | return p->next; |
090089c4 | 328 | } |
329 | ||
deb79f06 | 330 | peer * |
331 | getFirstPeer(void) | |
090089c4 | 332 | { |
40a1495e | 333 | return Config.peers; |
090089c4 | 334 | } |
335 | ||
b8d8561b | 336 | static void |
deb79f06 | 337 | neighborRemove(peer * target) |
30a4f2a8 | 338 | { |
b69f7771 | 339 | peer *p = NULL; |
340 | peer **P = NULL; | |
40a1495e | 341 | p = Config.peers; |
342 | P = &Config.peers; | |
b69f7771 | 343 | while (p) { |
344 | if (target == p) | |
30a4f2a8 | 345 | break; |
b69f7771 | 346 | P = &p->next; |
347 | p = p->next; | |
348 | } | |
349 | if (p) { | |
350 | *P = p->next; | |
b6a2f15e | 351 | cbdataFree(p); |
40a1495e | 352 | Config.npeers--; |
4d64d74a | 353 | } |
40a1495e | 354 | first_ping = Config.peers; |
4d64d74a | 355 | } |
356 | ||
b8d8561b | 357 | void |
358 | neighbors_open(int fd) | |
090089c4 | 359 | { |
30a4f2a8 | 360 | struct sockaddr_in name; |
6637e3a5 | 361 | socklen_t len = sizeof(struct sockaddr_in); |
30a4f2a8 | 362 | struct servent *sep = NULL; |
b263bd3f | 363 | const char *me = getMyHostname(); |
364 | peer *this; | |
365 | peer *next; | |
30a4f2a8 | 366 | memset(&name, '\0', sizeof(struct sockaddr_in)); |
367 | if (getsockname(fd, (struct sockaddr *) &name, &len) < 0) | |
a3d5953d | 368 | debug(15, 1) ("getsockname(%d,%p,%p) failed.\n", fd, &name, &len); |
b263bd3f | 369 | for (this = Config.peers; this; this = next) { |
370 | sockaddr_in_list *s; | |
371 | next = this->next; | |
372 | if (0 != strcmp(this->host, me)) | |
373 | continue; | |
374 | for (s = Config.Sockaddr.http; s; s = s->next) { | |
375 | if (this->http_port != ntohs(s->s.sin_port)) | |
376 | continue; | |
377 | debug(15, 1) ("WARNING: Peer looks like this host\n"); | |
378 | debug(15, 1) (" Ignoring %s %s/%d/%d\n", | |
379 | neighborTypeStr(this), this->host, this->http_port, | |
380 | this->icp.port); | |
381 | neighborRemove(this); | |
382 | } | |
383 | } | |
384 | ||
5999b776 | 385 | peerRefreshDNS((void *) 1); |
30a4f2a8 | 386 | if (0 == echo_hdr.opcode) { |
27cd7235 | 387 | echo_hdr.opcode = ICP_SECHO; |
30a4f2a8 | 388 | echo_hdr.version = ICP_VERSION_CURRENT; |
389 | echo_hdr.length = 0; | |
390 | echo_hdr.reqnum = 0; | |
391 | echo_hdr.flags = 0; | |
392 | echo_hdr.pad = 0; | |
30a4f2a8 | 393 | echo_hdr.shostid = name.sin_addr.s_addr; |
394 | sep = getservbyname("echo", "udp"); | |
395 | echo_port = sep ? ntohs((u_short) sep->s_port) : 7; | |
090089c4 | 396 | } |
c68e4e90 | 397 | first_ping = Config.peers; |
ed7f5615 | 398 | cachemgrRegister("server_list", |
399 | "Peer Cache Statistics", | |
1da3b90b | 400 | neighborDumpPeers, 0, 1); |
22f3fd98 | 401 | cachemgrRegister("non_peers", |
402 | "List of Unknown sites sending ICP messages", | |
1da3b90b | 403 | neighborDumpNonPeers, 0, 1); |
090089c4 | 404 | } |
405 | ||
b8d8561b | 406 | int |
b6c0e933 | 407 | neighborsUdpPing(request_t * request, |
641941c0 | 408 | StoreEntry * entry, |
582b6456 | 409 | IRCB * callback, |
641941c0 | 410 | void *callback_data, |
52040193 | 411 | int *exprep, |
465dc415 | 412 | int *timeout) |
090089c4 | 413 | { |
9fb13bb6 | 414 | const char *url = storeUrl(entry); |
b6c0e933 | 415 | MemObject *mem = entry->mem_obj; |
b69f7771 | 416 | peer *p = NULL; |
090089c4 | 417 | int i; |
1061b406 | 418 | int reqnum = 0; |
6d2296d4 | 419 | int flags; |
9dee2904 | 420 | icp_common_t *query; |
429fdbec | 421 | int queries_sent = 0; |
0a0bf5db | 422 | int peers_pinged = 0; |
a8c926ff | 423 | int parent_timeout = 0, parent_exprep = 0; |
424 | int sibling_timeout = 0, sibling_exprep = 0; | |
090089c4 | 425 | |
40a1495e | 426 | if (Config.peers == NULL) |
090089c4 | 427 | return 0; |
ce66013b | 428 | if (theOutIcpConnection < 0) |
429 | fatal("neighborsUdpPing: There is no ICP socket!"); | |
9fb13bb6 | 430 | assert(entry->swap_status == SWAPOUT_NONE); |
b6c0e933 | 431 | mem->start_ping = current_time; |
b4e7f82d | 432 | mem->ping_reply_callback = callback; |
b6c0e933 | 433 | mem->ircb_data = callback_data; |
186477c1 | 434 | reqnum = icpSetCacheKey(entry->hash.key); |
40a1495e | 435 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
b69f7771 | 436 | if (p == NULL) |
40a1495e | 437 | p = Config.peers; |
a3d5953d | 438 | debug(15, 5) ("neighborsUdpPing: Peer %s\n", p->host); |
b69f7771 | 439 | if (!peerWouldBePinged(p, request)) |
deb79f06 | 440 | continue; /* next peer */ |
0a0bf5db | 441 | peers_pinged++; |
a3d5953d | 442 | debug(15, 4) ("neighborsUdpPing: pinging peer %s for '%s'\n", |
b69f7771 | 443 | p->host, url); |
444 | if (p->type == PEER_MULTICAST) | |
03a1ee42 | 445 | mcastSetTtl(theOutIcpConnection, p->mcast.ttl); |
186477c1 | 446 | debug(15, 3) ("neighborsUdpPing: key = '%s'\n", storeKeyText(entry->hash.key)); |
a3d5953d | 447 | debug(15, 3) ("neighborsUdpPing: reqnum = %d\n", reqnum); |
090089c4 | 448 | |
dc9d133b | 449 | #if USE_HTCP |
cd196bc8 | 450 | if (p->options.htcp) { |
1994bb24 | 451 | debug(15, 3) ("neighborsUdpPing: sending HTCP query\n"); |
176ae152 | 452 | htcpQuery(entry, request, p); |
dc9d133b | 453 | } else |
454 | #endif | |
399cabec | 455 | if (p->icp.port == echo_port) { |
a3d5953d | 456 | debug(15, 4) ("neighborsUdpPing: Looks like a dumb cache, send DECHO ping\n"); |
1061b406 | 457 | echo_hdr.reqnum = reqnum; |
27cd7235 | 458 | query = icpCreateMessage(ICP_DECHO, 0, url, reqnum, 0); |
af00901c | 459 | icpUdpSend(theOutIcpConnection, |
b69f7771 | 460 | &p->in_addr, |
9dee2904 | 461 | query, |
721b3dd8 | 462 | LOG_ICP_QUERY, |
aee4e794 | 463 | 0); |
090089c4 | 464 | } else { |
6d2296d4 | 465 | flags = 0; |
17a0a4ee | 466 | if (Config.onoff.query_icmp) |
399cabec | 467 | if (p->icp.version == ICP_VERSION_2) |
429fdbec | 468 | flags |= ICP_FLAG_SRC_RTT; |
27cd7235 | 469 | query = icpCreateMessage(ICP_QUERY, flags, url, reqnum, 0); |
af00901c | 470 | icpUdpSend(theOutIcpConnection, |
b69f7771 | 471 | &p->in_addr, |
9dee2904 | 472 | query, |
721b3dd8 | 473 | LOG_ICP_QUERY, |
aee4e794 | 474 | 0); |
090089c4 | 475 | } |
429fdbec | 476 | queries_sent++; |
090089c4 | 477 | |
b69f7771 | 478 | p->stats.pings_sent++; |
b69f7771 | 479 | if (p->type == PEER_MULTICAST) { |
dc835977 | 480 | /* |
481 | * set a bogus last_reply time so neighborUp() never | |
482 | * says a multicast peer is dead. | |
483 | */ | |
484 | p->stats.last_reply = squid_curtime; | |
b69f7771 | 485 | (*exprep) += p->mcast.n_replies_expected; |
47b780e1 | 486 | } else if (neighborUp(p)) { |
487 | /* its alive, expect a reply from it */ | |
a8c926ff | 488 | if (neighborType(p, request) == PEER_PARENT) { |
489 | parent_exprep++; | |
490 | parent_timeout += p->stats.rtt; | |
491 | } else { | |
492 | sibling_exprep++; | |
493 | sibling_timeout += p->stats.rtt; | |
494 | } | |
090089c4 | 495 | } else { |
1061b406 | 496 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ |
090089c4 | 497 | /* log it once at the threshold */ |
dc835977 | 498 | if (p->stats.logged_state == PEER_ALIVE) { |
ab4b78e9 | 499 | debug(15, 1) ("Detected DEAD %s: %s/%d/%d\n", |
b69f7771 | 500 | neighborTypeStr(p), |
399cabec | 501 | p->host, p->http_port, p->icp.port); |
dc835977 | 502 | p->stats.logged_state = PEER_DEAD; |
090089c4 | 503 | } |
504 | } | |
dc835977 | 505 | p->stats.last_query = squid_curtime; |
83b381d5 | 506 | if (p->stats.probe_start == 0) |
507 | p->stats.probe_start = squid_curtime; | |
090089c4 | 508 | } |
40a1495e | 509 | if ((first_ping = first_ping->next) == NULL) |
510 | first_ping = Config.peers; | |
090089c4 | 511 | |
0ab965da | 512 | #if ALLOW_SOURCE_PING |
090089c4 | 513 | /* only do source_ping if we have neighbors */ |
40a1495e | 514 | if (Config.npeers) { |
a369131d | 515 | const ipcache_addrs *ia = NULL; |
516 | struct sockaddr_in to_addr; | |
517 | char *host = request->host; | |
17a0a4ee | 518 | if (!Config.onoff.source_ping) { |
a3d5953d | 519 | debug(15, 6) ("neighborsUdpPing: Source Ping is disabled.\n"); |
0a0bf5db | 520 | } else if ((ia = ipcache_gethostbyname(host, 0))) { |
a3d5953d | 521 | debug(15, 6) ("neighborsUdpPing: Source Ping: to %s for '%s'\n", |
1061b406 | 522 | host, url); |
1061b406 | 523 | echo_hdr.reqnum = reqnum; |
16b204c4 | 524 | if (icmp_sock != -1) { |
e5f6c5c2 | 525 | icmpSourcePing(ia->in_addrs[ia->cur], &echo_hdr, url); |
16b204c4 | 526 | } else { |
527 | to_addr.sin_family = AF_INET; | |
e5f6c5c2 | 528 | to_addr.sin_addr = ia->in_addrs[ia->cur]; |
16b204c4 | 529 | to_addr.sin_port = htons(echo_port); |
27cd7235 | 530 | query = icpCreateMessage(ICP_SECHO, 0, url, reqnum, 0); |
16b204c4 | 531 | icpUdpSend(theOutIcpConnection, |
16b204c4 | 532 | &to_addr, |
9dee2904 | 533 | query, |
721b3dd8 | 534 | LOG_ICP_QUERY, |
aee4e794 | 535 | 0); |
16b204c4 | 536 | } |
090089c4 | 537 | } else { |
a3d5953d | 538 | debug(15, 6) ("neighborsUdpPing: Source Ping: unknown host: %s\n", |
1061b406 | 539 | host); |
090089c4 | 540 | } |
541 | } | |
429fdbec | 542 | #endif |
a8c926ff | 543 | /* |
544 | * How many replies to expect? | |
545 | */ | |
546 | *exprep = parent_exprep + sibling_exprep; | |
547 | ||
52040193 | 548 | /* |
465dc415 | 549 | * If there is a configured timeout, use it |
52040193 | 550 | */ |
465dc415 | 551 | if (Config.Timeout.icp_query) |
bb337ad7 | 552 | *timeout = Config.Timeout.icp_query; |
28993292 | 553 | else { |
a8c926ff | 554 | if (*exprep > 0) { |
555 | if (parent_exprep) | |
556 | *timeout = 2 * parent_timeout / parent_exprep; | |
557 | else | |
558 | *timeout = 2 * sibling_timeout / sibling_exprep; | |
559 | } else | |
28993292 | 560 | *timeout = 2000; /* 2 seconds */ |
561 | if (Config.Timeout.icp_query_max) | |
562 | if (*timeout > Config.Timeout.icp_query_max) | |
563 | *timeout = Config.Timeout.icp_query_max; | |
43af4d27 | 564 | if (*timeout < Config.Timeout.icp_query_min) |
565 | *timeout = Config.Timeout.icp_query_min; | |
28993292 | 566 | } |
0a0bf5db | 567 | return peers_pinged; |
090089c4 | 568 | } |
569 | ||
26b164ac | 570 | /* lookup the digest of a given peer */ |
571 | lookup_t | |
f66a9ef4 | 572 | peerDigestLookup(peer * p, request_t * request) |
26b164ac | 573 | { |
6cfa8966 | 574 | #if USE_CACHE_DIGESTS |
f66a9ef4 | 575 | const cache_key *key = request ? storeKeyPublicByRequest(request) : NULL; |
26b164ac | 576 | assert(p); |
0c511722 | 577 | assert(request); |
69c95dd3 | 578 | debug(15, 5) ("peerDigestLookup: peer %s\n", p->host); |
4b4cd312 | 579 | /* does the peeer have a valid digest? */ |
e13ee7ad | 580 | if (!p->digest) { |
581 | debug(15, 5) ("peerDigestLookup: gone!\n"); | |
26b164ac | 582 | return LOOKUP_NONE; |
9689d97c | 583 | } else if (!peerHTTPOkay(p, request)) { |
e13ee7ad | 584 | debug(15, 5) ("peerDigestLookup: !peerHTTPOkay\n"); |
26b164ac | 585 | return LOOKUP_NONE; |
e13ee7ad | 586 | } else if (p->digest->flags.usable) { |
587 | debug(15, 5) ("peerDigestLookup: usable\n"); | |
4b4cd312 | 588 | /* fall through; put here to have common case on top */ ; |
e13ee7ad | 589 | } else if (!p->digest->flags.needed) { |
590 | debug(15, 5) ("peerDigestLookup: note need\n"); | |
591 | peerDigestNeeded(p->digest); | |
26b164ac | 592 | return LOOKUP_NONE; |
593 | } else { | |
e13ee7ad | 594 | debug(15, 5) ("peerDigestLookup: !ready && %srequested\n", |
595 | p->digest->flags.requested ? "" : "!"); | |
26b164ac | 596 | return LOOKUP_NONE; |
597 | } | |
69c95dd3 | 598 | debug(15, 5) ("peerDigestLookup: OK to lookup peer %s\n", p->host); |
e13ee7ad | 599 | assert(p->digest->cd); |
26b164ac | 600 | /* does digest predict a hit? */ |
e13ee7ad | 601 | if (!cacheDigestTest(p->digest->cd, key)) |
26b164ac | 602 | return LOOKUP_MISS; |
69c95dd3 | 603 | debug(15, 5) ("peerDigestLookup: peer %s says HIT!\n", p->host); |
26b164ac | 604 | return LOOKUP_HIT; |
605 | #endif | |
606 | return LOOKUP_NONE; | |
607 | } | |
608 | ||
609 | /* select best peer based on cache digests */ | |
a54d3f8e | 610 | peer * |
f66a9ef4 | 611 | neighborsDigestSelect(request_t * request) |
a54d3f8e | 612 | { |
613 | peer *best_p = NULL; | |
6cfa8966 | 614 | #if USE_CACHE_DIGESTS |
a54d3f8e | 615 | const cache_key *key; |
616 | int best_rtt = 0; | |
617 | int choice_count = 0; | |
618 | int ichoice_count = 0; | |
619 | peer *p; | |
620 | int p_rtt; | |
621 | int i; | |
03058802 | 622 | if (!request->flags.hierarchical) |
623 | return NULL; | |
f66a9ef4 | 624 | key = storeKeyPublicByRequest(request); |
a54d3f8e | 625 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
26b164ac | 626 | lookup_t lookup; |
a54d3f8e | 627 | if (!p) |
628 | p = Config.peers; | |
629 | if (i == 1) | |
630 | first_ping = p; | |
f66a9ef4 | 631 | lookup = peerDigestLookup(p, request); |
26b164ac | 632 | if (lookup == LOOKUP_NONE) |
a54d3f8e | 633 | continue; |
a54d3f8e | 634 | choice_count++; |
26b164ac | 635 | if (lookup == LOOKUP_MISS) |
a54d3f8e | 636 | continue; |
26b164ac | 637 | p_rtt = netdbHostRtt(p->host); |
638 | debug(15, 5) ("neighborsDigestSelect: peer %s rtt: %d\n", | |
a54d3f8e | 639 | p->host, p_rtt); |
640 | /* is this peer better than others in terms of rtt ? */ | |
641 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { | |
642 | best_p = p; | |
643 | best_rtt = p_rtt; | |
4b4cd312 | 644 | if (p_rtt) /* informative choice (aka educated guess) */ |
a54d3f8e | 645 | ichoice_count++; |
646 | debug(15, 4) ("neighborsDigestSelect: peer %s leads with rtt %d\n", | |
647 | p->host, best_rtt); | |
648 | } | |
649 | } | |
26b164ac | 650 | debug(15, 4) ("neighborsDigestSelect: choices: %d (%d)\n", |
651 | choice_count, ichoice_count); | |
652 | peerNoteDigestLookup(request, best_p, | |
653 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); | |
a54d3f8e | 654 | request->hier.n_choices = choice_count; |
655 | request->hier.n_ichoices = ichoice_count; | |
656 | #endif | |
657 | return best_p; | |
658 | } | |
659 | ||
26b164ac | 660 | void |
4b4cd312 | 661 | peerNoteDigestLookup(request_t * request, peer * p, lookup_t lookup) |
26b164ac | 662 | { |
6cfa8966 | 663 | #if USE_CACHE_DIGESTS |
26b164ac | 664 | if (p) |
665 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)); | |
666 | else | |
667 | *request->hier.cd_host = '\0'; | |
668 | request->hier.cd_lookup = lookup; | |
669 | debug(15, 4) ("peerNoteDigestLookup: peer %s, lookup: %s\n", | |
670 | p ? p->host : "<none>", lookup_t_str[lookup]); | |
671 | #endif | |
672 | } | |
673 | ||
d73844ca | 674 | static void |
b69f7771 | 675 | neighborAlive(peer * p, const MemObject * mem, const icp_common_t * header) |
4eda6afe | 676 | { |
39ac34a9 | 677 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { |
ab4b78e9 | 678 | debug(15, 1) ("Detected REVIVED %s: %s/%d/%d\n", |
b69f7771 | 679 | neighborTypeStr(p), |
399cabec | 680 | p->host, p->http_port, p->icp.port); |
dc835977 | 681 | p->stats.logged_state = PEER_ALIVE; |
4eda6afe | 682 | } |
dc835977 | 683 | p->stats.last_reply = squid_curtime; |
83b381d5 | 684 | p->stats.probe_start = 0; |
44f2f2e4 | 685 | p->stats.pings_acked++; |
27cd7235 | 686 | if ((icp_opcode) header->opcode <= ICP_END) |
399cabec | 687 | p->icp.counts[header->opcode]++; |
44f2f2e4 | 688 | p->icp.version = (int) header->version; |
689 | } | |
690 | ||
691 | static void | |
692 | neighborUpdateRtt(peer * p, MemObject * mem) | |
693 | { | |
694 | int rtt; | |
d2cd6935 | 695 | if (!mem) |
696 | return; | |
44f2f2e4 | 697 | if (!mem->start_ping.tv_sec) |
698 | return; | |
699 | rtt = tvSubMsec(mem->start_ping, current_time); | |
1b6ef2d2 | 700 | if (rtt < 1 || rtt > 10000) |
701 | return; | |
702 | p->stats.rtt = intAverage(p->stats.rtt, rtt, | |
d46a87a8 | 703 | p->stats.pings_acked, RTT_AV_FACTOR); |
4eda6afe | 704 | } |
090089c4 | 705 | |
399cabec | 706 | #if USE_HTCP |
707 | static void | |
708 | neighborAliveHtcp(peer * p, const MemObject * mem, const htcpReplyData * htcp) | |
709 | { | |
399cabec | 710 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { |
711 | debug(15, 1) ("Detected REVIVED %s: %s/%d/%d\n", | |
712 | neighborTypeStr(p), | |
713 | p->host, p->http_port, p->icp.port); | |
714 | p->stats.logged_state = PEER_ALIVE; | |
715 | } | |
716 | p->stats.last_reply = squid_curtime; | |
83b381d5 | 717 | p->stats.probe_start = 0; |
44f2f2e4 | 718 | p->stats.pings_acked++; |
399cabec | 719 | p->htcp.counts[htcp->hit ? 1 : 0]++; |
44f2f2e4 | 720 | p->htcp.version = htcp->version; |
399cabec | 721 | } |
722 | #endif | |
723 | ||
38792624 | 724 | static void |
56b62ecc | 725 | neighborCountIgnored(peer * p) |
a7e59001 | 726 | { |
b69f7771 | 727 | if (p == NULL) |
a7e59001 | 728 | return; |
b69f7771 | 729 | p->stats.ignored_replies++; |
c7a3724d | 730 | NLateReplies++; |
a7e59001 | 731 | } |
732 | ||
e102ebda | 733 | static peer *non_peers = NULL; |
734 | ||
735 | static void | |
736 | neighborIgnoreNonPeer(const struct sockaddr_in *from, icp_opcode opcode) | |
737 | { | |
738 | peer *np; | |
e102ebda | 739 | for (np = non_peers; np; np = np->next) { |
740 | if (np->in_addr.sin_addr.s_addr != from->sin_addr.s_addr) | |
741 | continue; | |
742 | if (np->in_addr.sin_port != from->sin_port) | |
743 | continue; | |
744 | break; | |
745 | } | |
746 | if (np == NULL) { | |
747 | np = xcalloc(1, sizeof(peer)); | |
748 | np->in_addr.sin_addr = from->sin_addr; | |
749 | np->in_addr.sin_port = from->sin_port; | |
399cabec | 750 | np->icp.port = ntohl(from->sin_port); |
e102ebda | 751 | np->type = PEER_NONE; |
752 | np->host = xstrdup(inet_ntoa(from->sin_addr)); | |
753 | np->next = non_peers; | |
754 | non_peers = np; | |
755 | } | |
399cabec | 756 | np->icp.counts[opcode]++; |
e4cc2fdf | 757 | if (isPowTen(++np->stats.ignored_replies)) |
758 | debug(15, 1) ("WARNING: Ignored %d replies from non-peer %s\n", | |
759 | np->stats.ignored_replies, np->host); | |
e102ebda | 760 | } |
761 | ||
429fdbec | 762 | /* ignoreMulticastReply |
763 | * | |
d6827718 | 764 | * * We want to ignore replies from multicast peers if the |
765 | * * cache_host_domain rules would normally prevent the peer | |
766 | * * from being used | |
429fdbec | 767 | */ |
768 | static int | |
b69f7771 | 769 | ignoreMulticastReply(peer * p, MemObject * mem) |
429fdbec | 770 | { |
b69f7771 | 771 | if (p == NULL) |
429fdbec | 772 | return 0; |
cd196bc8 | 773 | if (!p->options.mcast_responder) |
429fdbec | 774 | return 0; |
b69f7771 | 775 | if (peerHTTPOkay(p, mem->request)) |
429fdbec | 776 | return 0; |
777 | return 1; | |
778 | } | |
779 | ||
780 | /* I should attach these records to the entry. We take the first | |
781 | * hit we get our wait until everyone misses. The timeout handler | |
782 | * call needs to nip this shopping list or call one of the misses. | |
783 | * | |
784 | * If a hit process is already started, then sobeit | |
785 | */ | |
b8d8561b | 786 | void |
5ad33356 | 787 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const struct sockaddr_in *from) |
090089c4 | 788 | { |
b69f7771 | 789 | peer *p = NULL; |
5ad33356 | 790 | StoreEntry *entry; |
791 | MemObject *mem = NULL; | |
b6c0e933 | 792 | peer_t ntype = PEER_NONE; |
5e5126cc | 793 | char *opcode_d; |
a7e59001 | 794 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 795 | |
5ad33356 | 796 | debug(15, 6) ("neighborsUdpAck: opcode %d '%s'\n", |
797 | (int) opcode, storeKeyText(key)); | |
798 | if (NULL != (entry = storeGet(key))) | |
799 | mem = entry->mem_obj; | |
b69f7771 | 800 | if ((p = whichPeer(from))) |
801 | neighborAlive(p, mem, header); | |
27cd7235 | 802 | if (opcode > ICP_END) |
d2af9477 | 803 | return; |
27cd7235 | 804 | opcode_d = icp_opcode_str[opcode]; |
41587298 | 805 | if (p) |
806 | neighborUpdateRtt(p, mem); | |
5ad33356 | 807 | /* Does the entry exist? */ |
808 | if (NULL == entry) { | |
809 | debug(12, 3) ("neighborsUdpAck: Cache key '%s' not found\n", | |
810 | storeKeyText(key)); | |
56b62ecc | 811 | neighborCountIgnored(p); |
5ad33356 | 812 | return; |
813 | } | |
2d1c6a4f | 814 | /* check if someone is already fetching it */ |
d46a87a8 | 815 | if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) { |
5ad33356 | 816 | debug(15, 3) ("neighborsUdpAck: '%s' already being fetched.\n", |
817 | storeKeyText(key)); | |
56b62ecc | 818 | neighborCountIgnored(p); |
d2af9477 | 819 | return; |
820 | } | |
2d1c6a4f | 821 | if (mem == NULL) { |
5ad33356 | 822 | debug(15, 2) ("Ignoring %s for missing mem_obj: %s\n", |
823 | opcode_d, storeKeyText(key)); | |
56b62ecc | 824 | neighborCountIgnored(p); |
8de2f7ad | 825 | return; |
826 | } | |
827 | if (entry->ping_status != PING_WAITING) { | |
674ac814 | 828 | debug(15, 2) ("neighborsUdpAck: Late %s for %s\n", |
5ad33356 | 829 | opcode_d, storeKeyText(key)); |
56b62ecc | 830 | neighborCountIgnored(p); |
8de2f7ad | 831 | return; |
832 | } | |
4eda6afe | 833 | if (entry->lock_count == 0) { |
5ad33356 | 834 | debug(12, 1) ("neighborsUdpAck: '%s' has no locks\n", |
835 | storeKeyText(key)); | |
56b62ecc | 836 | neighborCountIgnored(p); |
4eda6afe | 837 | return; |
090089c4 | 838 | } |
a3d5953d | 839 | debug(15, 3) ("neighborsUdpAck: %s for '%s' from %s \n", |
5ad33356 | 840 | opcode_d, storeKeyText(key), p ? p->host : "source"); |
44f2f2e4 | 841 | if (p) { |
b69f7771 | 842 | ntype = neighborType(p, mem->request); |
44f2f2e4 | 843 | } |
b69f7771 | 844 | if (ignoreMulticastReply(p, mem)) { |
56b62ecc | 845 | neighborCountIgnored(p); |
27cd7235 | 846 | } else if (opcode == ICP_MISS) { |
b69f7771 | 847 | if (p == NULL) { |
e102ebda | 848 | neighborIgnoreNonPeer(from, opcode); |
d2af9477 | 849 | } else { |
b4e7f82d | 850 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); |
30a4f2a8 | 851 | } |
a7c05555 | 852 | } else if (opcode == ICP_HIT) { |
b69f7771 | 853 | if (p == NULL) { |
e102ebda | 854 | neighborIgnoreNonPeer(from, opcode); |
d2af9477 | 855 | } else { |
27cd7235 | 856 | header->opcode = ICP_HIT; |
b4e7f82d | 857 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); |
090089c4 | 858 | } |
27cd7235 | 859 | } else if (opcode == ICP_DECHO) { |
b69f7771 | 860 | if (p == NULL) { |
e102ebda | 861 | neighborIgnoreNonPeer(from, opcode); |
deb79f06 | 862 | } else if (ntype == PEER_SIBLING) { |
5e604a0e | 863 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); |
864 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
090089c4 | 865 | } else { |
b4e7f82d | 866 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); |
090089c4 | 867 | } |
27cd7235 | 868 | } else if (opcode == ICP_SECHO) { |
b69f7771 | 869 | if (p) { |
a3d5953d | 870 | debug(15, 1) ("Ignoring SECHO from neighbor %s\n", p->host); |
56b62ecc | 871 | neighborCountIgnored(p); |
0ab965da | 872 | #if ALLOW_SOURCE_PING |
873 | } else if (Config.onoff.source_ping) { | |
b4e7f82d | 874 | mem->ping_reply_callback(NULL, ntype, PROTO_ICP, header, mem->ircb_data); |
0ab965da | 875 | #endif |
876 | } else { | |
877 | debug(15, 1) ("Unsolicited SECHO from %s\n", inet_ntoa(from->sin_addr)); | |
090089c4 | 878 | } |
27cd7235 | 879 | } else if (opcode == ICP_DENIED) { |
b69f7771 | 880 | if (p == NULL) { |
e102ebda | 881 | neighborIgnoreNonPeer(from, opcode); |
b69f7771 | 882 | } else if (p->stats.pings_acked > 100) { |
399cabec | 883 | if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) { |
a3d5953d | 884 | debug(15, 0) ("95%% of replies from '%s' are UDP_DENIED\n", p->host); |
885 | debug(15, 0) ("Disabling '%s', please check your configuration.\n", p->host); | |
b69f7771 | 886 | neighborRemove(p); |
887 | p = NULL; | |
e006d372 | 888 | } else { |
56b62ecc | 889 | neighborCountIgnored(p); |
30a4f2a8 | 890 | } |
891 | } | |
27cd7235 | 892 | } else if (opcode == ICP_MISS_NOFETCH) { |
b4e7f82d | 893 | mem->ping_reply_callback(p, ntype, PROTO_ICP, header, mem->ircb_data); |
090089c4 | 894 | } else { |
a3d5953d | 895 | debug(15, 0) ("neighborsUdpAck: Unexpected ICP reply: %s\n", opcode_d); |
d2af9477 | 896 | } |
090089c4 | 897 | } |
898 | ||
deb79f06 | 899 | peer * |
40a1495e | 900 | peerFindByName(const char *name) |
98ffb7e4 | 901 | { |
b69f7771 | 902 | peer *p = NULL; |
40a1495e | 903 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 904 | if (!strcasecmp(name, p->host)) |
98ffb7e4 | 905 | break; |
906 | } | |
b69f7771 | 907 | return p; |
98ffb7e4 | 908 | } |
b012353a | 909 | |
db1cd23c | 910 | peer * |
911 | peerFindByNameAndPort(const char *name, unsigned short port) | |
912 | { | |
913 | peer *p = NULL; | |
914 | for (p = Config.peers; p; p = p->next) { | |
915 | if (strcasecmp(name, p->host)) | |
916 | continue; | |
917 | if (port != p->http_port) | |
918 | continue; | |
919 | break; | |
920 | } | |
921 | return p; | |
922 | } | |
923 | ||
5269d0bd | 924 | int |
b69f7771 | 925 | neighborUp(const peer * p) |
5269d0bd | 926 | { |
eb406bb7 | 927 | if (!p->tcp_up) { |
a4b8110e | 928 | peerProbeConnect((peer *) p); |
03b82057 | 929 | return 0; |
eb406bb7 | 930 | } |
83b381d5 | 931 | if (p->options.no_query) |
03b82057 | 932 | return 1; |
83b381d5 | 933 | if (p->stats.probe_start != 0 && |
a4b8110e | 934 | squid_curtime - p->stats.probe_start > Config.Timeout.deadPeer) |
03b82057 | 935 | return 0; |
64b8103b | 936 | /* |
937 | * The peer can not be UP if we don't have any IP addresses | |
186477c1 | 938 | * for it. |
64b8103b | 939 | */ |
940 | if (0 == p->n_addresses) | |
941 | return 0; | |
03b82057 | 942 | return 1; |
5269d0bd | 943 | } |
944 | ||
e6e3b09b | 945 | void |
28c60158 | 946 | peerDestroy(void *data) |
e6e3b09b | 947 | { |
db1cd23c | 948 | peer *p = data; |
ee4a1f5d | 949 | struct _domain_ping *l = NULL; |
950 | struct _domain_ping *nl = NULL; | |
b69f7771 | 951 | if (p == NULL) |
3c6e634f | 952 | return; |
b6a2f15e | 953 | for (l = p->peer_domain; l; l = nl) { |
ee4a1f5d | 954 | nl = l->next; |
955 | safe_free(l->domain); | |
956 | safe_free(l); | |
957 | } | |
b69f7771 | 958 | safe_free(p->host); |
e13ee7ad | 959 | #if USE_CACHE_DIGESTS |
b6a2f15e | 960 | if (p->digest) { |
961 | PeerDigest *pd = p->digest; | |
962 | p->digest = NULL; | |
963 | cbdataUnlock(pd); | |
964 | } | |
e13ee7ad | 965 | #endif |
e6e3b09b | 966 | } |
c7a3724d | 967 | |
e13ee7ad | 968 | void |
e16d4250 | 969 | peerNoteDigestGone(peer * p) |
e13ee7ad | 970 | { |
971 | #if USE_CACHE_DIGESTS | |
972 | if (p->digest) { | |
fcbbccfe | 973 | PeerDigest *pd = p->digest; |
e13ee7ad | 974 | p->digest = NULL; |
fcbbccfe | 975 | cbdataUnlock(pd); |
e13ee7ad | 976 | } |
977 | #endif | |
978 | } | |
979 | ||
dd4bd44e | 980 | static void |
03a1ee42 | 981 | peerDNSConfigure(const ipcache_addrs * ia, void *data) |
dd4bd44e | 982 | { |
b69f7771 | 983 | peer *p = data; |
dd4bd44e | 984 | struct sockaddr_in *ap; |
985 | int j; | |
b69f7771 | 986 | if (p->n_addresses == 0) { |
a3d5953d | 987 | debug(15, 1) ("Configuring %s %s/%d/%d\n", neighborTypeStr(p), |
399cabec | 988 | p->host, p->http_port, p->icp.port); |
b69f7771 | 989 | if (p->type == PEER_MULTICAST) |
a3d5953d | 990 | debug(15, 1) (" Multicast TTL = %d\n", p->mcast.ttl); |
b69f7771 | 991 | } |
992 | p->n_addresses = 0; | |
dd4bd44e | 993 | if (ia == NULL) { |
a3d5953d | 994 | debug(0, 0) ("WARNING: DNS lookup for '%s' failed!\n", p->host); |
dd4bd44e | 995 | return; |
996 | } | |
c04fe656 | 997 | if ((int) ia->count < 1) { |
a3d5953d | 998 | debug(0, 0) ("WARNING: No IP address found for '%s'!\n", p->host); |
dd4bd44e | 999 | return; |
1000 | } | |
c04fe656 | 1001 | for (j = 0; j < (int) ia->count && j < PEER_MAX_ADDRESSES; j++) { |
b69f7771 | 1002 | p->addresses[j] = ia->in_addrs[j]; |
a3d5953d | 1003 | debug(15, 2) ("--> IP address #%d: %s\n", j, inet_ntoa(p->addresses[j])); |
b69f7771 | 1004 | p->n_addresses++; |
dd4bd44e | 1005 | } |
b69f7771 | 1006 | ap = &p->in_addr; |
dd4bd44e | 1007 | memset(ap, '\0', sizeof(struct sockaddr_in)); |
1008 | ap->sin_family = AF_INET; | |
b69f7771 | 1009 | ap->sin_addr = p->addresses[0]; |
399cabec | 1010 | ap->sin_port = htons(p->icp.port); |
b69f7771 | 1011 | if (p->type == PEER_MULTICAST) |
1012 | peerCountMcastPeersSchedule(p, 10); | |
1a827bc0 | 1013 | if (p->type != PEER_MULTICAST) |
cd196bc8 | 1014 | if (!p->options.no_netdb_exchange) |
223213df | 1015 | eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1); |
dd4bd44e | 1016 | } |
1017 | ||
1018 | static void | |
51242273 | 1019 | peerRefreshDNS(void *data) |
dd4bd44e | 1020 | { |
b69f7771 | 1021 | peer *p = NULL; |
46ca5fc6 | 1022 | if (eventFind(peerRefreshDNS, NULL)) |
73cb7e3a | 1023 | eventDelete(peerRefreshDNS, NULL); |
51242273 | 1024 | if (!data && 0 == stat5minClientRequests()) { |
1f3c4622 | 1025 | /* no recent client traffic, wait a bit */ |
5999b776 | 1026 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 180.0, 1); |
1f3c4622 | 1027 | return; |
dd4bd44e | 1028 | } |
1f3c4622 | 1029 | for (p = Config.peers; p; p = p->next) |
1030 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); | |
dd4bd44e | 1031 | /* Reconfigure the peers every hour */ |
52040193 | 1032 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 3600.0, 1); |
dd4bd44e | 1033 | } |
e924600d | 1034 | |
eb406bb7 | 1035 | void |
a4b8110e | 1036 | peerConnectFailed(peer * p) |
eb406bb7 | 1037 | { |
1038 | p->stats.last_connect_failure = squid_curtime; | |
1039 | if (!p->tcp_up) { | |
1040 | debug(15, 2) ("TCP connection to %s/%d dead\n", p->host, p->http_port); | |
1041 | return; | |
1042 | } | |
1043 | debug(15, 1) ("TCP connection to %s/%d failed\n", p->host, p->http_port); | |
1044 | p->tcp_up--; | |
1045 | if (!p->tcp_up) { | |
1046 | debug(15, 1) ("Detected DEAD %s: %s/%d/%d\n", | |
1047 | neighborTypeStr(p), | |
1048 | p->host, p->http_port, p->icp.port); | |
1049 | p->stats.logged_state = PEER_DEAD; | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | void | |
a4b8110e | 1054 | peerConnectSucceded(peer * p) |
eb406bb7 | 1055 | { |
1056 | if (!p->tcp_up) { | |
1057 | debug(15, 2) ("TCP connection to %s/%d succeded\n", p->host, p->http_port); | |
1058 | debug(15, 1) ("Detected REVIVED %s: %s/%d/%d\n", | |
1059 | neighborTypeStr(p), | |
1060 | p->host, p->http_port, p->icp.port); | |
1061 | p->stats.logged_state = PEER_ALIVE; | |
1062 | } | |
1063 | p->tcp_up = PEER_TCP_MAGIC_COUNT; | |
1064 | } | |
1065 | ||
0e7b6b06 | 1066 | /* |
eb406bb7 | 1067 | * peerProbeConnect will be called on dead peers by neighborUp |
0e7b6b06 | 1068 | */ |
e924600d | 1069 | static void |
a4b8110e | 1070 | peerProbeConnect(peer * p) |
e924600d | 1071 | { |
e924600d | 1072 | int fd; |
eb406bb7 | 1073 | if (p->test_fd != -1) |
a4b8110e | 1074 | return; /* probe already running */ |
eb406bb7 | 1075 | if (squid_curtime - p->stats.last_connect_probe < Config.Timeout.connect) |
a4b8110e | 1076 | return; /* don't probe to often */ |
d6827718 | 1077 | fd = comm_open(SOCK_STREAM, 0, getOutgoingAddr(NULL), |
e924600d | 1078 | 0, COMM_NONBLOCKING, p->host); |
1079 | if (fd < 0) | |
1080 | return; | |
03a1ee42 | 1081 | p->test_fd = fd; |
eb406bb7 | 1082 | p->stats.last_connect_probe = squid_curtime; |
1083 | ipcache_nbgethostbyname(p->host, peerProbeConnect2, p); | |
e924600d | 1084 | } |
1085 | ||
1086 | static void | |
eb406bb7 | 1087 | peerProbeConnect2(const ipcache_addrs * ianotused, void *data) |
e924600d | 1088 | { |
1089 | peer *p = data; | |
03a1ee42 | 1090 | commConnectStart(p->test_fd, |
e924600d | 1091 | p->host, |
1092 | p->http_port, | |
eb406bb7 | 1093 | peerProbeConnectDone, |
e924600d | 1094 | p); |
1095 | } | |
1096 | ||
1097 | static void | |
eb406bb7 | 1098 | peerProbeConnectDone(int fd, int status, void *data) |
e924600d | 1099 | { |
1100 | peer *p = data; | |
98829f69 | 1101 | if (status == COMM_OK) { |
eb406bb7 | 1102 | peerConnectSucceded(p); |
e924600d | 1103 | } else { |
eb406bb7 | 1104 | peerConnectFailed(p); |
e924600d | 1105 | } |
1106 | comm_close(fd); | |
eb406bb7 | 1107 | p->test_fd = -1; |
e924600d | 1108 | return; |
1109 | } | |
1110 | ||
429fdbec | 1111 | static void |
1112 | peerCountMcastPeersSchedule(peer * p, time_t when) | |
1113 | { | |
b515fc11 | 1114 | if (p->mcast.flags.count_event_pending) |
429fdbec | 1115 | return; |
1116 | eventAdd("peerCountMcastPeersStart", | |
1117 | peerCountMcastPeersStart, | |
1118 | p, | |
52040193 | 1119 | (double) when, 1); |
b515fc11 | 1120 | p->mcast.flags.count_event_pending = 1; |
429fdbec | 1121 | } |
1122 | ||
1123 | static void | |
1124 | peerCountMcastPeersStart(void *data) | |
1125 | { | |
1126 | peer *p = data; | |
28c60158 | 1127 | ps_state *psstate; |
429fdbec | 1128 | StoreEntry *fake; |
1129 | MemObject *mem; | |
1130 | icp_common_t *query; | |
007b8be4 | 1131 | int reqnum; |
429fdbec | 1132 | LOCAL_ARRAY(char, url, MAX_URL); |
ce66013b | 1133 | assert(p->type == PEER_MULTICAST); |
b515fc11 | 1134 | p->mcast.flags.count_event_pending = 0; |
042461c3 | 1135 | snprintf(url, MAX_URL, "http://%s/", inet_ntoa(p->in_addr.sin_addr)); |
92695e5e | 1136 | fake = storeCreateEntry(url, url, null_request_flags, METHOD_GET); |
72711e31 | 1137 | psstate = cbdataAlloc(ps_state); |
429fdbec | 1138 | psstate->request = requestLink(urlParse(METHOD_GET, url)); |
1139 | psstate->entry = fake; | |
1140 | psstate->callback = NULL; | |
429fdbec | 1141 | psstate->callback_data = p; |
b4e7f82d | 1142 | psstate->ping.start = current_time; |
429fdbec | 1143 | mem = fake->mem_obj; |
2db609de | 1144 | mem->request = requestLink(psstate->request); |
429fdbec | 1145 | mem->start_ping = current_time; |
b4e7f82d | 1146 | mem->ping_reply_callback = peerCountHandleIcpReply; |
429fdbec | 1147 | mem->ircb_data = psstate; |
03a1ee42 | 1148 | mcastSetTtl(theOutIcpConnection, p->mcast.ttl); |
007b8be4 | 1149 | p->mcast.id = mem->id; |
186477c1 | 1150 | reqnum = icpSetCacheKey(fake->hash.key); |
007b8be4 | 1151 | query = icpCreateMessage(ICP_QUERY, 0, url, reqnum, 0); |
429fdbec | 1152 | icpUdpSend(theOutIcpConnection, |
1153 | &p->in_addr, | |
1154 | query, | |
721b3dd8 | 1155 | LOG_ICP_QUERY, |
aee4e794 | 1156 | 0); |
429fdbec | 1157 | fake->ping_status = PING_WAITING; |
1158 | eventAdd("peerCountMcastPeersDone", | |
1159 | peerCountMcastPeersDone, | |
2db609de | 1160 | psstate, |
465dc415 | 1161 | (double) Config.Timeout.mcast_icp_query, 1); |
b515fc11 | 1162 | p->mcast.flags.counting = 1; |
429fdbec | 1163 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); |
1164 | } | |
1165 | ||
1166 | static void | |
1167 | peerCountMcastPeersDone(void *data) | |
1168 | { | |
1169 | ps_state *psstate = data; | |
1170 | peer *p = psstate->callback_data; | |
1171 | StoreEntry *fake = psstate->entry; | |
b515fc11 | 1172 | p->mcast.flags.counting = 0; |
9e4ad609 | 1173 | p->mcast.avg_n_members = doubleAverage(p->mcast.avg_n_members, |
b4e7f82d | 1174 | (double) psstate->ping.n_recv, |
9e4ad609 | 1175 | ++p->mcast.n_times_counted, |
1176 | 10); | |
1a827bc0 | 1177 | debug(15, 1) ("Group %s: %d replies, %4.1f average, RTT %d\n", |
429fdbec | 1178 | p->host, |
b4e7f82d | 1179 | psstate->ping.n_recv, |
1a827bc0 | 1180 | p->mcast.avg_n_members, |
1181 | p->stats.rtt); | |
429fdbec | 1182 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; |
b7fe0ab0 | 1183 | EBIT_SET(fake->flags, ENTRY_ABORTED); |
e7a22b88 | 1184 | requestUnlink(fake->mem_obj->request); |
f0d5043e | 1185 | fake->mem_obj->request = NULL; |
429fdbec | 1186 | storeReleaseRequest(fake); |
1187 | storeUnlockObject(fake); | |
e7a22b88 | 1188 | requestUnlink(psstate->request); |
1a827bc0 | 1189 | cbdataFree(psstate); |
429fdbec | 1190 | } |
1191 | ||
1192 | static void | |
5942e8d4 | 1193 | peerCountHandleIcpReply(peer * p, peer_t type, protocol_t proto, void *hdrnotused, void *data) |
429fdbec | 1194 | { |
1195 | ps_state *psstate = data; | |
1a827bc0 | 1196 | StoreEntry *fake = psstate->entry; |
1197 | MemObject *mem = fake->mem_obj; | |
1198 | int rtt = tvSubMsec(mem->start_ping, current_time); | |
86aebcda | 1199 | assert(proto == PROTO_ICP); |
1a827bc0 | 1200 | assert(fake); |
1201 | assert(mem); | |
b4e7f82d | 1202 | psstate->ping.n_recv++; |
1203 | p->stats.rtt = intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, RTT_AV_FACTOR); | |
429fdbec | 1204 | } |
ed7f5615 | 1205 | |
1206 | static void | |
1207 | neighborDumpPeers(StoreEntry * sentry) | |
1208 | { | |
1209 | dump_peers(sentry, Config.peers); | |
1210 | } | |
1211 | ||
1212 | static void | |
1213 | neighborDumpNonPeers(StoreEntry * sentry) | |
1214 | { | |
1215 | dump_peers(sentry, non_peers); | |
1216 | } | |
1217 | ||
a369131d | 1218 | void |
1219 | dump_peer_options(StoreEntry * sentry, peer * p) | |
1220 | { | |
cd196bc8 | 1221 | if (p->options.proxy_only) |
a369131d | 1222 | storeAppendPrintf(sentry, " proxy-only"); |
cd196bc8 | 1223 | if (p->options.no_query) |
a369131d | 1224 | storeAppendPrintf(sentry, " no-query"); |
cd196bc8 | 1225 | if (p->options.no_digest) |
8638fc66 | 1226 | storeAppendPrintf(sentry, " no-digest"); |
cd196bc8 | 1227 | if (p->options.default_parent) |
a369131d | 1228 | storeAppendPrintf(sentry, " default"); |
cd196bc8 | 1229 | if (p->options.roundrobin) |
a369131d | 1230 | storeAppendPrintf(sentry, " round-robin"); |
cd196bc8 | 1231 | if (p->options.mcast_responder) |
a369131d | 1232 | storeAppendPrintf(sentry, " multicast-responder"); |
cd196bc8 | 1233 | if (p->options.closest_only) |
a369131d | 1234 | storeAppendPrintf(sentry, " closest-only"); |
dc9d133b | 1235 | #if USE_HTCP |
cd196bc8 | 1236 | if (p->options.htcp) |
e8d185d2 | 1237 | storeAppendPrintf(sentry, " htcp"); |
dc9d133b | 1238 | #endif |
cd196bc8 | 1239 | if (p->options.no_netdb_exchange) |
1a5dae67 | 1240 | storeAppendPrintf(sentry, " no-netdb-exchange"); |
95e36d02 | 1241 | #if DELAY_POOLS |
cd196bc8 | 1242 | if (p->options.no_delay) |
95e36d02 | 1243 | storeAppendPrintf(sentry, " no-delay"); |
1244 | #endif | |
c68e9c6b | 1245 | if (p->login) |
1246 | storeAppendPrintf(sentry, " login=%s", p->login); | |
a369131d | 1247 | if (p->mcast.ttl > 0) |
1248 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); | |
1249 | storeAppendPrintf(sentry, "\n"); | |
1250 | } | |
1251 | ||
ed7f5615 | 1252 | static void |
1253 | dump_peers(StoreEntry * sentry, peer * peers) | |
1254 | { | |
1255 | peer *e = NULL; | |
1256 | struct _domain_ping *d = NULL; | |
1257 | icp_opcode op; | |
06e6d12a | 1258 | int i; |
ed7f5615 | 1259 | if (peers == NULL) |
1260 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); | |
1261 | for (e = peers; e; e = e->next) { | |
1262 | assert(e->host != NULL); | |
1263 | storeAppendPrintf(sentry, "\n%-11.11s: %s/%d/%d\n", | |
1264 | neighborTypeStr(e), | |
1265 | e->host, | |
1266 | e->http_port, | |
399cabec | 1267 | e->icp.port); |
a369131d | 1268 | storeAppendPrintf(sentry, "Flags :"); |
1269 | dump_peer_options(sentry, e); | |
06e6d12a | 1270 | for (i = 0; i < e->n_addresses; i++) { |
1271 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, | |
1272 | inet_ntoa(e->addresses[i])); | |
1273 | } | |
ed7f5615 | 1274 | storeAppendPrintf(sentry, "Status : %s\n", |
1275 | neighborUp(e) ? "Up" : "Down"); | |
1276 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
c7f9eb6d | 1277 | storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open); |
ed7f5615 | 1278 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", |
1279 | (int) (squid_curtime - e->stats.last_query)); | |
1280 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1281 | (int) (squid_curtime - e->stats.last_reply)); | |
1282 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1283 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1284 | e->stats.pings_acked, | |
1285 | percent(e->stats.pings_acked, e->stats.pings_sent)); | |
1286 | storeAppendPrintf(sentry, "FETCHES : %8d %3d%%\n", | |
1287 | e->stats.fetches, | |
1288 | percent(e->stats.fetches, e->stats.pings_acked)); | |
1289 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", | |
1290 | e->stats.ignored_replies, | |
1291 | percent(e->stats.ignored_replies, e->stats.pings_acked)); | |
1292 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1994bb24 | 1293 | #if USE_HTCP |
cd196bc8 | 1294 | if (e->options.htcp) { |
1994bb24 | 1295 | storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n", |
1296 | e->htcp.counts[0], | |
1297 | percent(e->htcp.counts[0], e->stats.pings_acked)); | |
1298 | storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n", | |
1299 | e->htcp.counts[1], | |
1300 | percent(e->htcp.counts[1], e->stats.pings_acked)); | |
1301 | } else { | |
1302 | #endif | |
5942e8d4 | 1303 | for (op = ICP_INVALID; op < ICP_END; op++) { |
1304 | if (e->icp.counts[op] == 0) | |
1305 | continue; | |
1306 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1307 | icp_opcode_str[op], | |
1308 | e->icp.counts[op], | |
1309 | percent(e->icp.counts[op], e->stats.pings_acked)); | |
1310 | } | |
1994bb24 | 1311 | #if USE_HTCP |
5942e8d4 | 1312 | } |
1994bb24 | 1313 | #endif |
eb406bb7 | 1314 | if (e->stats.last_connect_failure) { |
ed7f5615 | 1315 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", |
eb406bb7 | 1316 | mkhttpdlogtime(&(e->stats.last_connect_failure))); |
ed7f5615 | 1317 | } |
b6a2f15e | 1318 | if (e->peer_domain != NULL) { |
ed7f5615 | 1319 | storeAppendPrintf(sentry, "DOMAIN LIST: "); |
b6a2f15e | 1320 | for (d = e->peer_domain; d; d = d->next) { |
5942e8d4 | 1321 | storeAppendPrintf(sentry, "%s%s ", |
1322 | d->do_ping ? null_string : "!", d->domain); | |
1994bb24 | 1323 | } |
1324 | storeAppendPrintf(sentry, "\n"); | |
ed7f5615 | 1325 | } |
99edd1c3 | 1326 | storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", |
ed7f5615 | 1327 | percent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); |
1328 | } | |
1329 | } | |
86aebcda | 1330 | |
1331 | #if USE_HTCP | |
1332 | void | |
1333 | neighborsHtcpReply(const cache_key * key, htcpReplyData * htcp, const struct sockaddr_in *from) | |
1334 | { | |
b4e7f82d | 1335 | StoreEntry *e = storeGet(key); |
399cabec | 1336 | MemObject *mem = NULL; |
1337 | peer *p; | |
1338 | peer_t ntype = PEER_NONE; | |
399cabec | 1339 | debug(15, 6) ("neighborsHtcpReply: %s %s\n", |
1340 | htcp->hit ? "HIT" : "MISS", storeKeyText(key)); | |
1341 | if (NULL != (e = storeGet(key))) | |
1342 | mem = e->mem_obj; | |
1343 | if ((p = whichPeer(from))) | |
1344 | neighborAliveHtcp(p, mem, htcp); | |
1345 | /* Does the entry exist? */ | |
1346 | if (NULL == e) { | |
1347 | debug(12, 3) ("neighyborsHtcpReply: Cache key '%s' not found\n", | |
1348 | storeKeyText(key)); | |
1349 | neighborCountIgnored(p); | |
1350 | return; | |
1351 | } | |
1352 | /* check if someone is already fetching it */ | |
d46a87a8 | 1353 | if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) { |
399cabec | 1354 | debug(15, 3) ("neighborsUdpAck: '%s' already being fetched.\n", |
1355 | storeKeyText(key)); | |
1356 | neighborCountIgnored(p); | |
1357 | return; | |
1358 | } | |
1359 | if (mem == NULL) { | |
1360 | debug(15, 2) ("Ignoring reply for missing mem_obj: %s\n", | |
1361 | storeKeyText(key)); | |
1362 | neighborCountIgnored(p); | |
1363 | return; | |
1364 | } | |
1365 | if (e->ping_status != PING_WAITING) { | |
1366 | debug(15, 2) ("neighborsUdpAck: Entry %s is not PING_WAITING\n", | |
1367 | storeKeyText(key)); | |
1368 | neighborCountIgnored(p); | |
1369 | return; | |
1370 | } | |
1371 | if (e->lock_count == 0) { | |
1372 | debug(12, 1) ("neighborsUdpAck: '%s' has no locks\n", | |
1373 | storeKeyText(key)); | |
1374 | neighborCountIgnored(p); | |
1375 | return; | |
1376 | } | |
44f2f2e4 | 1377 | if (p) { |
399cabec | 1378 | ntype = neighborType(p, mem->request); |
44f2f2e4 | 1379 | neighborUpdateRtt(p, mem); |
1380 | } | |
399cabec | 1381 | if (ignoreMulticastReply(p, mem)) { |
1382 | neighborCountIgnored(p); | |
1383 | return; | |
1384 | } | |
9bc73deb | 1385 | debug(15, 3) ("neighborsHtcpReply: e = %p\n", e); |
b4e7f82d | 1386 | mem->ping_reply_callback(p, ntype, PROTO_HTCP, htcp, mem->ircb_data); |
86aebcda | 1387 | } |
1388 | #endif |