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062e2281 | 1 | /* |
262a0e14 | 2 | * $Id$ |
062e2281 | 3 | * |
4 | * DEBUG: section 44 Peer Selection Algorithm | |
5 | * AUTHOR: Duane Wessels | |
6 | * | |
2b6662ba | 7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 8 | * ---------------------------------------------------------- |
062e2281 | 9 | * |
2b6662ba | 10 | * Squid is the result of efforts by numerous individuals from |
11 | * the Internet community; see the CONTRIBUTORS file for full | |
12 | * details. Many organizations have provided support for Squid's | |
13 | * development; see the SPONSORS file for full details. Squid is | |
14 | * Copyrighted (C) 2001 by the Regents of the University of | |
15 | * California; see the COPYRIGHT file for full details. Squid | |
16 | * incorporates software developed and/or copyrighted by other | |
17 | * sources; see the CREDITS file for full details. | |
062e2281 | 18 | * |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
26ac0430 | 23 | * |
062e2281 | 24 | * This program is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
26ac0430 | 28 | * |
062e2281 | 29 | * You should have received a copy of the GNU General Public License |
30 | * along with this program; if not, write to the Free Software | |
cbdec147 | 31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 32 | * |
062e2281 | 33 | */ |
34 | ||
f7f3304a | 35 | #include "squid-old.h" |
cfd66529 | 36 | #include "DnsLookupDetails.h" |
a37fdd8a | 37 | #include "errorpage.h" |
a553a5a3 | 38 | #include "event.h" |
b24880fe | 39 | #include "PeerSelectState.h" |
e6ccf245 | 40 | #include "Store.h" |
bbaf2685 | 41 | #include "hier_code.h" |
cfd66529 | 42 | #include "ICP.h" |
528b2c61 | 43 | #include "HttpRequest.h" |
127dce76 | 44 | #include "acl/FilledChecklist.h" |
924f73bc | 45 | #include "htcp.h" |
b6b6f466 | 46 | #include "forward.h" |
cfd66529 | 47 | #include "SquidTime.h" |
9b5c4a9a | 48 | #include "icmp/net_db.h" |
714e68b7 | 49 | #include "ipcache.h" |
062e2281 | 50 | |
26ac0430 | 51 | static struct { |
75e88d56 | 52 | int timeouts; |
2fadd50d | 53 | } PeerStats; |
062e2281 | 54 | |
26ac0430 AJ |
55 | static const char *DirectStr[] = { |
56 | "DIRECT_UNKNOWN", | |
57 | "DIRECT_NO", | |
58 | "DIRECT_MAYBE", | |
59 | "DIRECT_YES" | |
60 | }; | |
75e88d56 | 61 | |
f5b8bbc4 | 62 | static void peerSelectFoo(ps_state *); |
63 | static void peerPingTimeout(void *data); | |
86aebcda | 64 | static IRCB peerHandlePingReply; |
f5b8bbc4 | 65 | static void peerSelectStateFree(ps_state * psstate); |
66 | static void peerIcpParentMiss(peer *, icp_common_t *, ps_state *); | |
44e237d0 | 67 | #if USE_HTCP |
68 | static void peerHtcpParentMiss(peer *, htcpReplyData *, ps_state *); | |
69 | static void peerHandleHtcpReply(peer *, peer_t, htcpReplyData *, void *); | |
70 | #endif | |
f5b8bbc4 | 71 | static int peerCheckNetdbDirect(ps_state * psstate); |
db1cd23c | 72 | static void peerGetSomeNeighbor(ps_state *); |
73 | static void peerGetSomeNeighborReplies(ps_state *); | |
74 | static void peerGetSomeDirect(ps_state *); | |
75 | static void peerGetSomeParent(ps_state *); | |
168dfda9 | 76 | static void peerGetAllParents(ps_state *); |
db1cd23c | 77 | static void peerAddFwdServer(FwdServer **, peer *, hier_code); |
d67acb4e | 78 | static void peerSelectPinned(ps_state * ps); |
cfd66529 AJ |
79 | static void peerSelectDnsResults(const ipcache_addrs *ia, const DnsLookupDetails &details, void *data); |
80 | ||
aa839030 | 81 | CBDATA_CLASS_INIT(ps_state); |
82 | ||
348b2031 | 83 | static void |
84 | peerSelectStateFree(ps_state * psstate) | |
85 | { | |
5ae21d99 AJ |
86 | if (psstate->entry) { |
87 | debugs(44, 3, HERE << psstate->entry->url()); | |
88 | ||
89 | if (psstate->entry->ping_status == PING_WAITING) | |
90 | eventDelete(peerPingTimeout, psstate); | |
91 | ||
92 | psstate->entry->ping_status = PING_DONE; | |
93 | } | |
94 | ||
348b2031 | 95 | if (psstate->acl_checklist) { |
bf8fe701 | 96 | debugs(44, 1, "calling aclChecklistFree() from peerSelectStateFree"); |
62e76326 | 97 | delete (psstate->acl_checklist); |
348b2031 | 98 | } |
62e76326 | 99 | |
6dd9f4bd | 100 | HTTPMSGUNLOCK(psstate->request); |
62e76326 | 101 | |
73a201f8 | 102 | if (psstate->entry) { |
62e76326 | 103 | assert(psstate->entry->ping_status != PING_WAITING); |
97b5e68f | 104 | psstate->entry->unlock(); |
62e76326 | 105 | psstate->entry = NULL; |
73a201f8 | 106 | } |
62e76326 | 107 | |
a37fdd8a AJ |
108 | delete psstate->lastError; |
109 | ||
8407afee | 110 | cbdataFree(psstate); |
348b2031 | 111 | } |
062e2281 | 112 | |
2d72d4fd | 113 | static int |
190154cf | 114 | peerSelectIcpPing(HttpRequest * request, int direct, StoreEntry * entry) |
062e2281 | 115 | { |
7b665aeb | 116 | int n; |
db1cd23c | 117 | assert(entry); |
118 | assert(entry->ping_status == PING_NONE); | |
9bd6a36d | 119 | assert(direct != DIRECT_YES); |
bf8fe701 | 120 | debugs(44, 3, "peerSelectIcpPing: " << entry->url() ); |
62e76326 | 121 | |
92695e5e | 122 | if (!request->flags.hierarchical && direct != DIRECT_NO) |
62e76326 | 123 | return 0; |
124 | ||
d46a87a8 | 125 | if (EBIT_TEST(entry->flags, KEY_PRIVATE) && !neighbors_do_private_keys) |
62e76326 | 126 | if (direct != DIRECT_NO) |
127 | return 0; | |
128 | ||
7b665aeb | 129 | n = neighborsCount(request); |
62e76326 | 130 | |
bf8fe701 | 131 | debugs(44, 3, "peerSelectIcpPing: counted " << n << " neighbors"); |
62e76326 | 132 | |
7b665aeb | 133 | return n; |
062e2281 | 134 | } |
135 | ||
136 | ||
062e2281 | 137 | void |
00ae51e4 | 138 | peerSelect(Comm::ConnectionList * paths, |
cfd66529 | 139 | HttpRequest * request, |
62e76326 | 140 | StoreEntry * entry, |
141 | PSC * callback, | |
142 | void *callback_data) | |
75e88d56 | 143 | { |
28c60158 | 144 | ps_state *psstate; |
62e76326 | 145 | |
86b389fc | 146 | if (entry) |
bf8fe701 | 147 | debugs(44, 3, "peerSelect: " << entry->url() ); |
86b389fc | 148 | else |
60745f24 | 149 | debugs(44, 3, "peerSelect: " << RequestMethodStr(request->method)); |
62e76326 | 150 | |
b24880fe | 151 | psstate = new ps_state; |
62e76326 | 152 | |
6dd9f4bd | 153 | psstate->request = HTTPMSGLOCK(request); |
62e76326 | 154 | |
b6c0e933 | 155 | psstate->entry = entry; |
cfd66529 AJ |
156 | psstate->paths = paths; |
157 | ||
b6c0e933 | 158 | psstate->callback = callback; |
62e76326 | 159 | |
fa80a8ef | 160 | psstate->callback_data = cbdataReference(callback_data); |
62e76326 | 161 | |
6cfa8966 | 162 | #if USE_CACHE_DIGESTS |
62e76326 | 163 | |
39edba21 | 164 | request->hier.peer_select_start = current_time; |
62e76326 | 165 | |
39edba21 | 166 | #endif |
62e76326 | 167 | |
2395cb21 | 168 | if (psstate->entry) |
cc192b50 | 169 | psstate->entry->lock(); |
62e76326 | 170 | |
b6c0e933 | 171 | peerSelectFoo(psstate); |
75e88d56 | 172 | } |
173 | ||
174 | static void | |
2efeb0b7 | 175 | peerCheckNeverDirectDone(allow_t answer, void *data) |
75e88d56 | 176 | { |
e6ccf245 | 177 | ps_state *psstate = (ps_state *) data; |
348b2031 | 178 | psstate->acl_checklist = NULL; |
bf8fe701 | 179 | debugs(44, 3, "peerCheckNeverDirectDone: " << answer); |
2efeb0b7 | 180 | psstate->never_direct = answer; |
3985b3f8 | 181 | switch (answer) { |
ae026ec6 | 182 | case ACCESS_ALLOWED: |
f365d297 AJ |
183 | /** if never_direct says YES, do that. */ |
184 | psstate->direct = DIRECT_NO; | |
ae026ec6 AJ |
185 | debugs(44, 3, HERE << "direct = " << DirectStr[psstate->direct] << " (never_direct allow)"); |
186 | break; | |
187 | case ACCESS_DENIED: // not relevant. | |
1f585949 | 188 | case ACCESS_DUNNO: // not relevant. |
ae026ec6 | 189 | break; |
1f585949 AJ |
190 | case ACCESS_AUTH_REQUIRED: |
191 | case ACCESS_AUTH_EXPIRED_OK: | |
192 | case ACCESS_AUTH_EXPIRED_BAD: | |
ae026ec6 | 193 | debugs(44, DBG_IMPORTANT, "WARNING: never_direct resulted in " << answer << ". Username ACLs are not reliable here."); |
1f585949 | 194 | break; |
ae026ec6 | 195 | } |
b6c0e933 | 196 | peerSelectFoo(psstate); |
75e88d56 | 197 | } |
198 | ||
199 | static void | |
2efeb0b7 | 200 | peerCheckAlwaysDirectDone(allow_t answer, void *data) |
75e88d56 | 201 | { |
e6ccf245 | 202 | ps_state *psstate = (ps_state *)data; |
348b2031 | 203 | psstate->acl_checklist = NULL; |
bf8fe701 | 204 | debugs(44, 3, "peerCheckAlwaysDirectDone: " << answer); |
2efeb0b7 | 205 | psstate->always_direct = answer; |
3985b3f8 | 206 | switch (answer) { |
ae026ec6 AJ |
207 | case ACCESS_ALLOWED: |
208 | /** if always_direct says YES, do that. */ | |
209 | psstate->direct = DIRECT_YES; | |
210 | debugs(44, 3, HERE << "direct = " << DirectStr[psstate->direct] << " (always_direct allow)"); | |
211 | break; | |
212 | case ACCESS_DENIED: // not relevant. | |
1f585949 | 213 | case ACCESS_DUNNO: // not relevant. |
ae026ec6 | 214 | break; |
1f585949 AJ |
215 | case ACCESS_AUTH_REQUIRED: |
216 | case ACCESS_AUTH_EXPIRED_OK: | |
217 | case ACCESS_AUTH_EXPIRED_BAD: | |
ae026ec6 | 218 | debugs(44, DBG_IMPORTANT, "WARNING: always_direct resulted in " << answer << ". Username ACLs are not reliable here."); |
1f585949 | 219 | break; |
ae026ec6 | 220 | } |
b6c0e933 | 221 | peerSelectFoo(psstate); |
75e88d56 | 222 | } |
223 | ||
cfd66529 AJ |
224 | void |
225 | peerSelectDnsPaths(ps_state *psstate) | |
226 | { | |
227 | FwdServer *fs = psstate->servers; | |
228 | ||
cfd66529 | 229 | // convert the list of FwdServer destinations into destinations IP addresses |
d6327017 | 230 | if (fs && psstate->paths->size() < (unsigned int)Config.forward_max_tries) { |
cfd66529 AJ |
231 | // send the next one off for DNS lookup. |
232 | const char *host = fs->_peer ? fs->_peer->host : psstate->request->GetHost(); | |
3dfe8371 | 233 | debugs(44, 2, "Find IP destination for: " << psstate->entry->url() << "' via " << host); |
cfd66529 AJ |
234 | ipcache_nbgethostbyname(host, peerSelectDnsResults, psstate); |
235 | return; | |
236 | } | |
237 | ||
238 | // done with DNS lookups. pass back to caller | |
3dfe8371 | 239 | PSC *callback = psstate->callback; |
fa80a8ef | 240 | psstate->callback = NULL; |
62e76326 | 241 | |
5ae21d99 | 242 | if (psstate->paths->size() < 1) { |
ce63af7f AJ |
243 | debugs(44, DBG_IMPORTANT, "Failed to select source for '" << psstate->entry->url() << "'"); |
244 | debugs(44, DBG_IMPORTANT, " always_direct = " << psstate->always_direct); | |
245 | debugs(44, DBG_IMPORTANT, " never_direct = " << psstate->never_direct); | |
246 | debugs(44, DBG_IMPORTANT, " timedout = " << psstate->ping.timedout); | |
5ae21d99 | 247 | } else { |
ce63af7f AJ |
248 | debugs(44, 2, "Found sources for '" << psstate->entry->url() << "'"); |
249 | debugs(44, 2, " always_direct = " << psstate->always_direct); | |
250 | debugs(44, 2, " never_direct = " << psstate->never_direct); | |
efbd2436 | 251 | for (size_t i = 0; i < psstate->paths->size(); i++) { |
ce63af7f AJ |
252 | if ((*psstate->paths)[i]->peerType == HIER_DIRECT) |
253 | debugs(44, 2, " DIRECT = " << (*psstate->paths)[i]); | |
254 | else | |
255 | debugs(44, 2, " cache_peer = " << (*psstate->paths)[i]); | |
efbd2436 | 256 | } |
ce63af7f | 257 | debugs(44, 2, " timedout = " << psstate->ping.timedout); |
5ae21d99 AJ |
258 | } |
259 | ||
260 | psstate->ping.stop = current_time; | |
261 | psstate->request->hier.ping = psstate->ping; | |
3dfe8371 | 262 | |
cfd66529 | 263 | void *cbdata; |
fa80a8ef | 264 | if (cbdataReferenceValidDone(psstate->callback_data, &cbdata)) { |
a37fdd8a AJ |
265 | callback(psstate->paths, psstate->lastError, cbdata); |
266 | psstate->lastError = NULL; // FwdState has taken control over the ErrorState object. | |
db1cd23c | 267 | } |
62e76326 | 268 | |
348b2031 | 269 | peerSelectStateFree(psstate); |
93775f90 | 270 | } |
271 | ||
cfd66529 AJ |
272 | static void |
273 | peerSelectDnsResults(const ipcache_addrs *ia, const DnsLookupDetails &details, void *data) | |
274 | { | |
275 | ps_state *psstate = (ps_state *)data; | |
276 | ||
277 | psstate->request->recordLookup(details); | |
278 | ||
279 | FwdServer *fs = psstate->servers; | |
280 | if (ia != NULL) { | |
281 | ||
282 | assert(ia->cur < ia->count); | |
283 | ||
284 | // loop over each result address, adding to the possible destinations. | |
cfd66529 AJ |
285 | int ip = ia->cur; |
286 | for (int n = 0; n < ia->count; n++, ip++) { | |
5229395c AJ |
287 | Comm::ConnectionPointer p; |
288 | ||
cfd66529 AJ |
289 | if (ip >= ia->count) ip = 0; // looped back to zero. |
290 | ||
27d1f0a0 | 291 | // Enforce forward_max_tries configuration. |
d6327017 | 292 | if (psstate->paths->size() >= (unsigned int)Config.forward_max_tries) |
27d1f0a0 AJ |
293 | break; |
294 | ||
cfd66529 AJ |
295 | // for TPROXY we must skip unusable addresses. |
296 | if (psstate->request->flags.spoof_client_ip && !(fs->_peer && fs->_peer->options.no_tproxy) ) { | |
dc49061a | 297 | if (ia->in_addrs[n].IsIPv4() != psstate->request->client_addr.IsIPv4()) { |
cfd66529 AJ |
298 | // we CAN'T spoof the address on this link. find another. |
299 | continue; | |
300 | } | |
301 | } | |
302 | ||
303 | p = new Comm::Connection(); | |
304 | p->remote = ia->in_addrs[n]; | |
cb443714 AJ |
305 | if (fs->_peer) |
306 | p->remote.SetPort(fs->_peer->http_port); | |
307 | else | |
308 | p->remote.SetPort(psstate->request->port); | |
5229395c | 309 | p->peerType = fs->code; |
ce63af7f | 310 | p->setPeer(fs->_peer); |
cfd66529 AJ |
311 | |
312 | // check for a configured outgoing address for this destination... | |
313 | getOutgoingAddress(psstate->request, p); | |
07f889c1 | 314 | psstate->paths->push_back(p); |
cfd66529 AJ |
315 | } |
316 | } else { | |
317 | debugs(44, 3, HERE << "Unknown host: " << fs->_peer ? fs->_peer->host : psstate->request->GetHost()); | |
a37fdd8a AJ |
318 | // discard any previous error. |
319 | delete psstate->lastError; | |
320 | psstate->lastError = NULL; | |
321 | if (fs->code == HIER_DIRECT) { | |
322 | psstate->lastError = new ErrorState(ERR_DNS_FAIL, HTTP_SERVICE_UNAVAILABLE, psstate->request); | |
323 | psstate->lastError->dnsError = details.error; | |
324 | } | |
cfd66529 AJ |
325 | } |
326 | ||
327 | psstate->servers = fs->next; | |
328 | cbdataReferenceDone(fs->_peer); | |
329 | memFree(fs, MEM_FWD_SERVER); | |
330 | ||
331 | // see if more paths can be found | |
332 | peerSelectDnsPaths(psstate); | |
333 | } | |
334 | ||
b3264694 | 335 | static int |
336 | peerCheckNetdbDirect(ps_state * psstate) | |
337 | { | |
9b5c4a9a | 338 | #if USE_ICMP |
5f84d830 | 339 | peer *p; |
b3264694 | 340 | int myrtt; |
341 | int myhops; | |
62e76326 | 342 | |
0886a797 | 343 | if (psstate->direct == DIRECT_NO) |
62e76326 | 344 | return 0; |
345 | ||
9b5c4a9a AJ |
346 | /* base lookup on RTT and Hops if ICMP NetDB is enabled. */ |
347 | ||
cc192b50 | 348 | myrtt = netdbHostRtt(psstate->request->GetHost()); |
62e76326 | 349 | |
bf8fe701 | 350 | debugs(44, 3, "peerCheckNetdbDirect: MY RTT = " << myrtt << " msec"); |
351 | debugs(44, 3, "peerCheckNetdbDirect: minimum_direct_rtt = " << Config.minDirectRtt << " msec"); | |
62e76326 | 352 | |
5f84d830 | 353 | if (myrtt && myrtt <= Config.minDirectRtt) |
62e76326 | 354 | return 1; |
355 | ||
cc192b50 | 356 | myhops = netdbHostHops(psstate->request->GetHost()); |
62e76326 | 357 | |
bf8fe701 | 358 | debugs(44, 3, "peerCheckNetdbDirect: MY hops = " << myhops); |
359 | debugs(44, 3, "peerCheckNetdbDirect: minimum_direct_hops = " << Config.minDirectHops); | |
62e76326 | 360 | |
b3264694 | 361 | if (myhops && myhops <= Config.minDirectHops) |
62e76326 | 362 | return 1; |
363 | ||
cc192b50 | 364 | p = whichPeer(psstate->closest_parent_miss); |
62e76326 | 365 | |
5f84d830 | 366 | if (p == NULL) |
62e76326 | 367 | return 0; |
368 | ||
bf8fe701 | 369 | debugs(44, 3, "peerCheckNetdbDirect: closest_parent_miss RTT = " << psstate->ping.p_rtt << " msec"); |
62e76326 | 370 | |
5f84d830 | 371 | if (myrtt && myrtt <= psstate->ping.p_rtt) |
62e76326 | 372 | return 1; |
373 | ||
9b5c4a9a AJ |
374 | #endif /* USE_ICMP */ |
375 | ||
b3264694 | 376 | return 0; |
377 | } | |
378 | ||
93775f90 | 379 | static void |
511f47bb | 380 | peerSelectFoo(ps_state * ps) |
062e2281 | 381 | { |
511f47bb | 382 | StoreEntry *entry = ps->entry; |
190154cf | 383 | HttpRequest *request = ps->request; |
60745f24 | 384 | debugs(44, 3, "peerSelectFoo: '" << RequestMethodStr(request->method) << " " << request->GetHost() << "'"); |
62e76326 | 385 | |
ae026ec6 | 386 | /** If we don't know whether DIRECT is permitted ... */ |
511f47bb | 387 | if (ps->direct == DIRECT_UNKNOWN) { |
ae026ec6 AJ |
388 | if (ps->always_direct == ACCESS_DUNNO) { |
389 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct] << " (always_direct to be checked)"); | |
b50e327b | 390 | /** check always_direct; */ |
ae026ec6 | 391 | ps->acl_checklist = new ACLFilledChecklist(Config.accessList.AlwaysDirect, request, NULL); |
b50e327b | 392 | ps->acl_checklist->nonBlockingCheck(peerCheckAlwaysDirectDone, ps); |
62e76326 | 393 | return; |
ae026ec6 AJ |
394 | } else if (ps->never_direct == ACCESS_DUNNO) { |
395 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct] << " (never_direct to be checked)"); | |
b50e327b | 396 | /** check never_direct; */ |
ae026ec6 AJ |
397 | ps->acl_checklist = new ACLFilledChecklist(Config.accessList.NeverDirect, request, NULL); |
398 | ps->acl_checklist->nonBlockingCheck(peerCheckNeverDirectDone, ps); | |
62e76326 | 399 | return; |
7f7bdd96 | 400 | } else if (request->flags.no_direct) { |
b50e327b | 401 | /** if we are accelerating, direct is not an option. */ |
62e76326 | 402 | ps->direct = DIRECT_NO; |
ae026ec6 | 403 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct] << " (forced non-direct)"); |
62e76326 | 404 | } else if (request->flags.loopdetect) { |
b50e327b | 405 | /** if we are in a forwarding-loop, direct is not an option. */ |
62e76326 | 406 | ps->direct = DIRECT_YES; |
ae026ec6 | 407 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct] << " (forwarding loop detected)"); |
62e76326 | 408 | } else if (peerCheckNetdbDirect(ps)) { |
409 | ps->direct = DIRECT_YES; | |
ae026ec6 | 410 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct] << " (checkNetdbDirect)"); |
62e76326 | 411 | } else { |
412 | ps->direct = DIRECT_MAYBE; | |
ae026ec6 | 413 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct] << " (default)"); |
62e76326 | 414 | } |
415 | ||
bf8fe701 | 416 | debugs(44, 3, "peerSelectFoo: direct = " << DirectStr[ps->direct]); |
db1cd23c | 417 | } |
62e76326 | 418 | |
d67acb4e AJ |
419 | if (!entry || entry->ping_status == PING_NONE) |
420 | peerSelectPinned(ps); | |
df503d6c | 421 | if (entry == NULL) { |
62e76326 | 422 | (void) 0; |
df503d6c | 423 | } else if (entry->ping_status == PING_NONE) { |
62e76326 | 424 | peerGetSomeNeighbor(ps); |
425 | ||
426 | if (entry->ping_status == PING_WAITING) | |
427 | return; | |
db1cd23c | 428 | } else if (entry->ping_status == PING_WAITING) { |
62e76326 | 429 | peerGetSomeNeighborReplies(ps); |
430 | entry->ping_status = PING_DONE; | |
db1cd23c | 431 | } |
62e76326 | 432 | |
168dfda9 | 433 | switch (ps->direct) { |
62e76326 | 434 | |
168dfda9 | 435 | case DIRECT_YES: |
62e76326 | 436 | peerGetSomeDirect(ps); |
437 | break; | |
438 | ||
168dfda9 | 439 | case DIRECT_NO: |
62e76326 | 440 | peerGetSomeParent(ps); |
441 | peerGetAllParents(ps); | |
442 | break; | |
443 | ||
168dfda9 | 444 | default: |
62e76326 | 445 | |
446 | if (Config.onoff.prefer_direct) | |
447 | peerGetSomeDirect(ps); | |
448 | ||
8b9a89c9 | 449 | if (request->flags.hierarchical || !Config.onoff.nonhierarchical_direct) { |
62e76326 | 450 | peerGetSomeParent(ps); |
8b9a89c9 AJ |
451 | peerGetAllParents(ps); |
452 | } | |
62e76326 | 453 | |
454 | if (!Config.onoff.prefer_direct) | |
455 | peerGetSomeDirect(ps); | |
456 | ||
457 | break; | |
168dfda9 | 458 | } |
62e76326 | 459 | |
3dfe8371 AJ |
460 | // resolve the possible peers |
461 | peerSelectDnsPaths(ps); | |
db1cd23c | 462 | } |
463 | ||
2efeb0b7 | 464 | bool peerAllowedToUse(const peer * p, HttpRequest * request); |
cfd66529 | 465 | |
27774cee | 466 | /** |
d67acb4e AJ |
467 | * peerSelectPinned |
468 | * | |
27774cee | 469 | * Selects a pinned connection. |
d67acb4e | 470 | */ |
d67acb4e AJ |
471 | static void |
472 | peerSelectPinned(ps_state * ps) | |
473 | { | |
474 | HttpRequest *request = ps->request; | |
d67acb4e AJ |
475 | if (!request->pinnedConnection()) |
476 | return; | |
e3a4aecc AJ |
477 | peer *pear = request->pinnedConnection()->pinnedPeer(); |
478 | if (Comm::IsConnOpen(request->pinnedConnection()->validatePinnedConnection(request, pear))) { | |
479 | if (pear && peerAllowedToUse(pear, request)) { | |
480 | peerAddFwdServer(&ps->servers, pear, PINNED); | |
d67acb4e AJ |
481 | if (ps->entry) |
482 | ps->entry->ping_status = PING_DONE; /* Skip ICP */ | |
e3a4aecc | 483 | } else if (!pear && ps->direct != DIRECT_NO) { |
d67acb4e AJ |
484 | peerAddFwdServer(&ps->servers, NULL, PINNED); |
485 | if (ps->entry) | |
486 | ps->entry->ping_status = PING_DONE; /* Skip ICP */ | |
487 | } | |
488 | } | |
489 | } | |
490 | ||
27774cee | 491 | /** |
db1cd23c | 492 | * peerGetSomeNeighbor |
26ac0430 | 493 | * |
db1cd23c | 494 | * Selects a neighbor (parent or sibling) based on one of the |
495 | * following methods: | |
496 | * Cache Digests | |
497 | * CARP | |
9b5c4a9a | 498 | * ICMP Netdb RTT estimates |
db1cd23c | 499 | * ICP/HTCP queries |
500 | */ | |
501 | static void | |
502 | peerGetSomeNeighbor(ps_state * ps) | |
503 | { | |
504 | StoreEntry *entry = ps->entry; | |
190154cf | 505 | HttpRequest *request = ps->request; |
db1cd23c | 506 | peer *p; |
507 | hier_code code = HIER_NONE; | |
508 | assert(entry->ping_status == PING_NONE); | |
62e76326 | 509 | |
db1cd23c | 510 | if (ps->direct == DIRECT_YES) { |
62e76326 | 511 | entry->ping_status = PING_DONE; |
512 | return; | |
124511e5 | 513 | } |
62e76326 | 514 | |
6cfa8966 | 515 | #if USE_CACHE_DIGESTS |
f66a9ef4 | 516 | if ((p = neighborsDigestSelect(request))) { |
62e76326 | 517 | if (neighborType(p, request) == PEER_PARENT) |
518 | code = CD_PARENT_HIT; | |
519 | else | |
520 | code = CD_SIBLING_HIT; | |
db1cd23c | 521 | } else |
c127134a | 522 | #endif |
62e76326 | 523 | if ((p = netdbClosestParent(request))) { |
524 | code = CLOSEST_PARENT; | |
525 | } else if (peerSelectIcpPing(request, ps->direct, entry)) { | |
bf8fe701 | 526 | debugs(44, 3, "peerSelect: Doing ICP pings"); |
62e76326 | 527 | ps->ping.start = current_time; |
528 | ps->ping.n_sent = neighborsUdpPing(request, | |
529 | entry, | |
530 | peerHandlePingReply, | |
531 | ps, | |
532 | &ps->ping.n_replies_expected, | |
533 | &ps->ping.timeout); | |
534 | ||
535 | if (ps->ping.n_sent == 0) | |
bf8fe701 | 536 | debugs(44, 0, "WARNING: neighborsUdpPing returned 0"); |
26ac0430 AJ |
537 | debugs(44, 3, "peerSelect: " << ps->ping.n_replies_expected << |
538 | " ICP replies expected, RTT " << ps->ping.timeout << | |
539 | " msec"); | |
62e76326 | 540 | |
62e76326 | 541 | |
542 | if (ps->ping.n_replies_expected > 0) { | |
543 | entry->ping_status = PING_WAITING; | |
544 | eventAdd("peerPingTimeout", | |
545 | peerPingTimeout, | |
546 | ps, | |
547 | 0.001 * ps->ping.timeout, | |
548 | 0); | |
549 | return; | |
550 | } | |
551 | } | |
552 | ||
db1cd23c | 553 | if (code != HIER_NONE) { |
62e76326 | 554 | assert(p); |
4b981814 | 555 | debugs(44, 3, "peerSelect: " << hier_code_str[code] << "/" << p->host); |
62e76326 | 556 | peerAddFwdServer(&ps->servers, p, code); |
db1cd23c | 557 | } |
62e76326 | 558 | |
db1cd23c | 559 | entry->ping_status = PING_DONE; |
560 | } | |
561 | ||
562 | /* | |
563 | * peerGetSomeNeighborReplies | |
26ac0430 | 564 | * |
db1cd23c | 565 | * Selects a neighbor (parent or sibling) based on ICP/HTCP replies. |
566 | */ | |
567 | static void | |
568 | peerGetSomeNeighborReplies(ps_state * ps) | |
569 | { | |
190154cf | 570 | HttpRequest *request = ps->request; |
db1cd23c | 571 | peer *p = NULL; |
572 | hier_code code = HIER_NONE; | |
4c5a1592 | 573 | assert(ps->entry->ping_status == PING_WAITING); |
db1cd23c | 574 | assert(ps->direct != DIRECT_YES); |
62e76326 | 575 | |
db1cd23c | 576 | if (peerCheckNetdbDirect(ps)) { |
62e76326 | 577 | code = CLOSEST_DIRECT; |
4b981814 | 578 | debugs(44, 3, "peerSelect: " << hier_code_str[code] << "/" << request->GetHost()); |
62e76326 | 579 | peerAddFwdServer(&ps->servers, NULL, code); |
580 | return; | |
db1cd23c | 581 | } |
62e76326 | 582 | |
db1cd23c | 583 | if ((p = ps->hit)) { |
62e76326 | 584 | code = ps->hit_type == PEER_PARENT ? PARENT_HIT : SIBLING_HIT; |
26ac0430 | 585 | } else { |
cc192b50 | 586 | if (!ps->closest_parent_miss.IsAnyAddr()) { |
587 | p = whichPeer(ps->closest_parent_miss); | |
588 | code = CLOSEST_PARENT_MISS; | |
589 | } else if (!ps->first_parent_miss.IsAnyAddr()) { | |
590 | p = whichPeer(ps->first_parent_miss); | |
591 | code = FIRST_PARENT_MISS; | |
592 | } | |
593 | } | |
db1cd23c | 594 | if (p && code != HIER_NONE) { |
4b981814 | 595 | debugs(44, 3, "peerSelect: " << hier_code_str[code] << "/" << p->host); |
62e76326 | 596 | peerAddFwdServer(&ps->servers, p, code); |
db1cd23c | 597 | } |
598 | } | |
599 | ||
600 | ||
601 | /* | |
602 | * peerGetSomeDirect | |
26ac0430 | 603 | * |
db1cd23c | 604 | * Simply adds a 'direct' entry to the FwdServers list if this |
605 | * request can be forwarded directly to the origin server | |
606 | */ | |
607 | static void | |
608 | peerGetSomeDirect(ps_state * ps) | |
609 | { | |
610 | if (ps->direct == DIRECT_NO) | |
62e76326 | 611 | return; |
612 | ||
db80e881 | 613 | /* WAIS is not implemented natively */ |
0c3d3f65 | 614 | if (ps->request->protocol == AnyP::PROTO_WAIS) |
26ac0430 | 615 | return; |
db80e881 | 616 | |
617 | peerAddFwdServer(&ps->servers, NULL, HIER_DIRECT); | |
db1cd23c | 618 | } |
619 | ||
620 | static void | |
621 | peerGetSomeParent(ps_state * ps) | |
622 | { | |
623 | peer *p; | |
190154cf | 624 | HttpRequest *request = ps->request; |
db1cd23c | 625 | hier_code code = HIER_NONE; |
60745f24 | 626 | debugs(44, 3, "peerGetSomeParent: " << RequestMethodStr(request->method) << " " << request->GetHost()); |
62e76326 | 627 | |
6b8e7481 | 628 | if (ps->direct == DIRECT_YES) |
62e76326 | 629 | return; |
630 | ||
b4ab8666 AJ |
631 | if ((p = peerSourceHashSelectParent(request))) { |
632 | code = SOURCEHASH_PARENT; | |
2f1431ea | 633 | #if USE_AUTH |
f7e1d9ce HN |
634 | } else if ((p = peerUserHashSelectParent(request))) { |
635 | code = USERHASH_PARENT; | |
2f1431ea | 636 | #endif |
b3995439 | 637 | } else if ((p = carpSelectParent(request))) { |
62e76326 | 638 | code = CARP; |
db1cd23c | 639 | } else if ((p = getRoundRobinParent(request))) { |
62e76326 | 640 | code = ROUNDROBIN_PARENT; |
d1b63fc8 | 641 | } else if ((p = getWeightedRoundRobinParent(request))) { |
62e76326 | 642 | code = ROUNDROBIN_PARENT; |
db1cd23c | 643 | } else if ((p = getFirstUpParent(request))) { |
62e76326 | 644 | code = FIRSTUP_PARENT; |
b4ab8666 AJ |
645 | } else if ((p = getDefaultParent(request))) { |
646 | code = DEFAULT_PARENT; | |
db1cd23c | 647 | } |
62e76326 | 648 | |
db1cd23c | 649 | if (code != HIER_NONE) { |
4b981814 | 650 | debugs(44, 3, "peerSelect: " << hier_code_str[code] << "/" << p->host); |
62e76326 | 651 | peerAddFwdServer(&ps->servers, p, code); |
062e2281 | 652 | } |
653 | } | |
654 | ||
168dfda9 | 655 | /* Adds alive parents. Used as a last resort for never_direct. |
656 | */ | |
657 | static void | |
658 | peerGetAllParents(ps_state * ps) | |
659 | { | |
660 | peer *p; | |
190154cf | 661 | HttpRequest *request = ps->request; |
168dfda9 | 662 | /* Add all alive parents */ |
62e76326 | 663 | |
168dfda9 | 664 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 665 | /* XXX: neighbors.c lacks a public interface for enumerating |
666 | * parents to a request so we have to dig some here.. | |
667 | */ | |
668 | ||
669 | if (neighborType(p, request) != PEER_PARENT) | |
670 | continue; | |
671 | ||
672 | if (!peerHTTPOkay(p, request)) | |
673 | continue; | |
674 | ||
bf8fe701 | 675 | debugs(15, 3, "peerGetAllParents: adding alive parent " << p->host); |
62e76326 | 676 | |
677 | peerAddFwdServer(&ps->servers, p, ANY_OLD_PARENT); | |
168dfda9 | 678 | } |
62e76326 | 679 | |
168dfda9 | 680 | /* XXX: should add dead parents here, but it is currently |
681 | * not possible to find out which parents are dead or which | |
682 | * simply are not configured to handle the request. | |
683 | */ | |
684 | /* Add default parent as a last resort */ | |
685 | if ((p = getDefaultParent(request))) { | |
62e76326 | 686 | peerAddFwdServer(&ps->servers, p, DEFAULT_PARENT); |
168dfda9 | 687 | } |
688 | } | |
689 | ||
d9586c3c | 690 | static void |
93775f90 | 691 | peerPingTimeout(void *data) |
062e2281 | 692 | { |
e6ccf245 | 693 | ps_state *psstate = (ps_state *)data; |
b6c0e933 | 694 | StoreEntry *entry = psstate->entry; |
62e76326 | 695 | |
fefb0227 | 696 | if (entry) |
bf8fe701 | 697 | debugs(44, 3, "peerPingTimeout: '" << entry->url() << "'" ); |
62e76326 | 698 | |
fa80a8ef | 699 | if (!cbdataReferenceValid(psstate->callback_data)) { |
62e76326 | 700 | /* request aborted */ |
701 | entry->ping_status = PING_DONE; | |
702 | cbdataReferenceDone(psstate->callback_data); | |
703 | peerSelectStateFree(psstate); | |
704 | return; | |
73a201f8 | 705 | } |
62e76326 | 706 | |
75e88d56 | 707 | PeerStats.timeouts++; |
44e237d0 | 708 | psstate->ping.timedout = 1; |
b6c0e933 | 709 | peerSelectFoo(psstate); |
85034133 | 710 | } |
711 | ||
712 | void | |
713 | peerSelectInit(void) | |
714 | { | |
75e88d56 | 715 | memset(&PeerStats, '\0', sizeof(PeerStats)); |
cfd66529 | 716 | memDataInit(MEM_FWD_SERVER, "FwdServer", sizeof(FwdServer), 0); |
062e2281 | 717 | } |
93775f90 | 718 | |
b3264694 | 719 | static void |
720 | peerIcpParentMiss(peer * p, icp_common_t * header, ps_state * ps) | |
721 | { | |
722 | int rtt; | |
62e76326 | 723 | |
9b5c4a9a | 724 | #if USE_ICMP |
b3264694 | 725 | if (Config.onoff.query_icmp) { |
62e76326 | 726 | if (header->flags & ICP_FLAG_SRC_RTT) { |
727 | rtt = header->pad & 0xFFFF; | |
9b5c4a9a | 728 | int hops = (header->pad >> 16) & 0xFFFF; |
62e76326 | 729 | |
730 | if (rtt > 0 && rtt < 0xFFFF) | |
731 | netdbUpdatePeer(ps->request, p, rtt, hops); | |
732 | ||
733 | if (rtt && (ps->ping.p_rtt == 0 || rtt < ps->ping.p_rtt)) { | |
734 | ps->closest_parent_miss = p->in_addr; | |
735 | ps->ping.p_rtt = rtt; | |
736 | } | |
737 | } | |
b3264694 | 738 | } |
9b5c4a9a | 739 | #endif /* USE_ICMP */ |
62e76326 | 740 | |
18ec72b2 | 741 | /* if closest-only is set, then don't allow FIRST_PARENT_MISS */ |
cd196bc8 | 742 | if (p->options.closest_only) |
62e76326 | 743 | return; |
744 | ||
85223cd7 | 745 | /* set FIRST_MISS if there is no CLOSEST parent */ |
cc192b50 | 746 | if (!ps->closest_parent_miss.IsAnyAddr()) |
62e76326 | 747 | return; |
748 | ||
d1b63fc8 | 749 | rtt = (tvSubMsec(ps->ping.start, current_time) - p->basetime) / p->weight; |
62e76326 | 750 | |
d1b63fc8 | 751 | if (rtt < 1) |
62e76326 | 752 | rtt = 1; |
753 | ||
cc192b50 | 754 | if (ps->first_parent_miss.IsAnyAddr() || rtt < ps->ping.w_rtt) { |
62e76326 | 755 | ps->first_parent_miss = p->in_addr; |
756 | ps->ping.w_rtt = rtt; | |
b3264694 | 757 | } |
758 | } | |
93775f90 | 759 | |
b6c0e933 | 760 | static void |
b3264694 | 761 | peerHandleIcpReply(peer * p, peer_t type, icp_common_t * header, void *data) |
93775f90 | 762 | { |
e6ccf245 | 763 | ps_state *psstate = (ps_state *)data; |
764 | icp_opcode op = header->getOpCode(); | |
bf8fe701 | 765 | debugs(44, 3, "peerHandleIcpReply: " << icp_opcode_str[op] << " " << psstate->entry->url() ); |
69c95dd3 | 766 | #if USE_CACHE_DIGESTS && 0 |
26b164ac | 767 | /* do cd lookup to count false misses */ |
62e76326 | 768 | |
3ab66981 | 769 | if (p && request) |
62e76326 | 770 | peerNoteDigestLookup(request, p, |
771 | peerDigestLookup(p, request, psstate->entry)); | |
772 | ||
26b164ac | 773 | #endif |
62e76326 | 774 | |
44e237d0 | 775 | psstate->ping.n_recv++; |
62e76326 | 776 | |
27cd7235 | 777 | if (op == ICP_MISS || op == ICP_DECHO) { |
62e76326 | 778 | if (type == PEER_PARENT) |
779 | peerIcpParentMiss(p, header, psstate); | |
a7c05555 | 780 | } else if (op == ICP_HIT) { |
62e76326 | 781 | psstate->hit = p; |
782 | psstate->hit_type = type; | |
783 | peerSelectFoo(psstate); | |
784 | return; | |
db1cd23c | 785 | } |
62e76326 | 786 | |
44e237d0 | 787 | if (psstate->ping.n_recv < psstate->ping.n_replies_expected) |
62e76326 | 788 | return; |
789 | ||
b6c0e933 | 790 | peerSelectFoo(psstate); |
93775f90 | 791 | } |
86aebcda | 792 | |
793 | #if USE_HTCP | |
794 | static void | |
44e237d0 | 795 | peerHandleHtcpReply(peer * p, peer_t type, htcpReplyData * htcp, void *data) |
86aebcda | 796 | { |
e6ccf245 | 797 | ps_state *psstate = (ps_state *)data; |
26ac0430 AJ |
798 | debugs(44, 3, "peerHandleHtcpReply: " << |
799 | (htcp->hit ? "HIT" : "MISS") << " " << | |
800 | psstate->entry->url() ); | |
44e237d0 | 801 | psstate->ping.n_recv++; |
62e76326 | 802 | |
44e237d0 | 803 | if (htcp->hit) { |
62e76326 | 804 | psstate->hit = p; |
805 | psstate->hit_type = type; | |
806 | peerSelectFoo(psstate); | |
807 | return; | |
44e237d0 | 808 | } |
62e76326 | 809 | |
44e237d0 | 810 | if (type == PEER_PARENT) |
62e76326 | 811 | peerHtcpParentMiss(p, htcp, psstate); |
812 | ||
44e237d0 | 813 | if (psstate->ping.n_recv < psstate->ping.n_replies_expected) |
62e76326 | 814 | return; |
815 | ||
44e237d0 | 816 | peerSelectFoo(psstate); |
817 | } | |
818 | ||
819 | static void | |
820 | peerHtcpParentMiss(peer * p, htcpReplyData * htcp, ps_state * ps) | |
821 | { | |
822 | int rtt; | |
62e76326 | 823 | |
9b5c4a9a | 824 | #if USE_ICMP |
44e237d0 | 825 | if (Config.onoff.query_icmp) { |
62e76326 | 826 | if (htcp->cto.rtt > 0) { |
827 | rtt = (int) htcp->cto.rtt * 1000; | |
9b5c4a9a | 828 | int hops = (int) htcp->cto.hops * 1000; |
62e76326 | 829 | netdbUpdatePeer(ps->request, p, rtt, hops); |
830 | ||
831 | if (rtt && (ps->ping.p_rtt == 0 || rtt < ps->ping.p_rtt)) { | |
832 | ps->closest_parent_miss = p->in_addr; | |
833 | ps->ping.p_rtt = rtt; | |
834 | } | |
835 | } | |
44e237d0 | 836 | } |
9b5c4a9a | 837 | #endif /* USE_ICMP */ |
62e76326 | 838 | |
44e237d0 | 839 | /* if closest-only is set, then don't allow FIRST_PARENT_MISS */ |
cd196bc8 | 840 | if (p->options.closest_only) |
62e76326 | 841 | return; |
842 | ||
44e237d0 | 843 | /* set FIRST_MISS if there is no CLOSEST parent */ |
cc192b50 | 844 | if (!ps->closest_parent_miss.IsAnyAddr()) |
62e76326 | 845 | return; |
846 | ||
d1b63fc8 | 847 | rtt = (tvSubMsec(ps->ping.start, current_time) - p->basetime) / p->weight; |
62e76326 | 848 | |
d1b63fc8 | 849 | if (rtt < 1) |
62e76326 | 850 | rtt = 1; |
851 | ||
cc192b50 | 852 | if (ps->first_parent_miss.IsAnyAddr() || rtt < ps->ping.w_rtt) { |
62e76326 | 853 | ps->first_parent_miss = p->in_addr; |
854 | ps->ping.w_rtt = rtt; | |
44e237d0 | 855 | } |
86aebcda | 856 | } |
62e76326 | 857 | |
86aebcda | 858 | #endif |
859 | ||
860 | static void | |
0c3d3f65 | 861 | peerHandlePingReply(peer * p, peer_t type, AnyP::ProtocolType proto, void *pingdata, void *data) |
86aebcda | 862 | { |
0c3d3f65 | 863 | if (proto == AnyP::PROTO_ICP) |
62e76326 | 864 | peerHandleIcpReply(p, type, (icp_common_t *)pingdata, data); |
865 | ||
86aebcda | 866 | #if USE_HTCP |
62e76326 | 867 | |
0c3d3f65 | 868 | else if (proto == AnyP::PROTO_HTCP) |
62e76326 | 869 | peerHandleHtcpReply(p, type, (htcpReplyData *)pingdata, data); |
870 | ||
86aebcda | 871 | #endif |
62e76326 | 872 | |
86aebcda | 873 | else |
0c3d3f65 | 874 | debugs(44, 1, "peerHandlePingReply: unknown protocol " << proto); |
86aebcda | 875 | } |
db1cd23c | 876 | |
877 | static void | |
b73f343e | 878 | peerAddFwdServer(FwdServer ** FSVR, peer * p, hier_code code) |
db1cd23c | 879 | { |
e6ccf245 | 880 | FwdServer *fs = (FwdServer *)memAllocate(MEM_FWD_SERVER); |
26ac0430 AJ |
881 | debugs(44, 5, "peerAddFwdServer: adding " << |
882 | (p ? p->host : "DIRECT") << " " << | |
4b981814 | 883 | hier_code_str[code] ); |
29b8d8d6 | 884 | fs->_peer = cbdataReference(p); |
db1cd23c | 885 | fs->code = code; |
62e76326 | 886 | |
b73f343e | 887 | while (*FSVR) |
888 | FSVR = &(*FSVR)->next; | |
62e76326 | 889 | |
b73f343e | 890 | *FSVR = fs; |
db1cd23c | 891 | } |
b24880fe | 892 | |
893 | void * | |
894 | ps_state::operator new(size_t) | |
895 | { | |
aa839030 | 896 | CBDATA_INIT_TYPE(ps_state); |
b24880fe | 897 | return cbdataAlloc(ps_state); |
898 | } | |
899 | ||
900 | ps_state::ps_state() : request (NULL), | |
901 | entry (NULL), | |
ae026ec6 AJ |
902 | always_direct(Config.accessList.AlwaysDirect?ACCESS_DUNNO:ACCESS_DENIED), |
903 | never_direct(Config.accessList.NeverDirect?ACCESS_DUNNO:ACCESS_DENIED), | |
904 | direct(DIRECT_UNKNOWN), | |
b24880fe | 905 | callback (NULL), |
906 | callback_data (NULL), | |
a37fdd8a | 907 | lastError(NULL), |
b24880fe | 908 | servers (NULL), |
cc192b50 | 909 | first_parent_miss(), |
910 | closest_parent_miss(), | |
b24880fe | 911 | hit(NULL), |
912 | hit_type(PEER_NONE), | |
b24880fe | 913 | acl_checklist (NULL) |
914 | { | |
cc192b50 | 915 | ; // no local defaults. |
b24880fe | 916 | } |
917 | ||
918 | ping_data::ping_data() : | |
919 | n_sent(0), | |
920 | n_recv(0), | |
921 | n_replies_expected(0), | |
922 | timeout(0), | |
923 | timedout(0), | |
924 | w_rtt(0), | |
925 | p_rtt(0) | |
926 | { | |
927 | start.tv_sec = 0; | |
928 | start.tv_usec = 0; | |
929 | stop.tv_sec = 0; | |
930 | stop.tv_usec = 0; | |
931 | } |