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22f3fd98 | 1 | |
30a4f2a8 | 2 | /* |
6cfa8966 | 3 | * $Id: neighbors.cc,v 1.200 1998/04/24 06:08:18 wessels Exp $ |
30a4f2a8 | 4 | * |
5 | * DEBUG: section 15 Neighbor Routines | |
6 | * AUTHOR: Harvest Derived | |
7 | * | |
42c04c16 | 8 | * SQUID Internet Object Cache http://squid.nlanr.net/Squid/ |
30a4f2a8 | 9 | * -------------------------------------------------------- |
10 | * | |
11 | * Squid is the result of efforts by numerous individuals from the | |
12 | * Internet community. Development is led by Duane Wessels of the | |
13 | * National Laboratory for Applied Network Research and funded by | |
14 | * the National Science Foundation. | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | * | |
4d64d74a | 30 | */ |
019dd986 | 31 | |
32 | /* | |
30a4f2a8 | 33 | * Copyright (c) 1994, 1995. All rights reserved. |
34 | * | |
35 | * The Harvest software was developed by the Internet Research Task | |
36 | * Force Research Group on Resource Discovery (IRTF-RD): | |
37 | * | |
38 | * Mic Bowman of Transarc Corporation. | |
39 | * Peter Danzig of the University of Southern California. | |
40 | * Darren R. Hardy of the University of Colorado at Boulder. | |
41 | * Udi Manber of the University of Arizona. | |
42 | * Michael F. Schwartz of the University of Colorado at Boulder. | |
43 | * Duane Wessels of the University of Colorado at Boulder. | |
44 | * | |
45 | * This copyright notice applies to software in the Harvest | |
46 | * ``src/'' directory only. Users should consult the individual | |
47 | * copyright notices in the ``components/'' subdirectories for | |
48 | * copyright information about other software bundled with the | |
49 | * Harvest source code distribution. | |
50 | * | |
51 | * TERMS OF USE | |
52 | * | |
53 | * The Harvest software may be used and re-distributed without | |
54 | * charge, provided that the software origin and research team are | |
55 | * cited in any use of the system. Most commonly this is | |
56 | * accomplished by including a link to the Harvest Home Page | |
57 | * (http://harvest.cs.colorado.edu/) from the query page of any | |
58 | * Broker you deploy, as well as in the query result pages. These | |
59 | * links are generated automatically by the standard Broker | |
60 | * software distribution. | |
61 | * | |
62 | * The Harvest software is provided ``as is'', without express or | |
63 | * implied warranty, and with no support nor obligation to assist | |
64 | * in its use, correction, modification or enhancement. We assume | |
65 | * no liability with respect to the infringement of copyrights, | |
66 | * trade secrets, or any patents, and are not responsible for | |
67 | * consequential damages. Proper use of the Harvest software is | |
68 | * entirely the responsibility of the user. | |
69 | * | |
70 | * DERIVATIVE WORKS | |
71 | * | |
72 | * Users may make derivative works from the Harvest software, subject | |
73 | * to the following constraints: | |
74 | * | |
75 | * - You must include the above copyright notice and these | |
76 | * accompanying paragraphs in all forms of derivative works, | |
77 | * and any documentation and other materials related to such | |
78 | * distribution and use acknowledge that the software was | |
79 | * developed at the above institutions. | |
80 | * | |
81 | * - You must notify IRTF-RD regarding your distribution of | |
82 | * the derivative work. | |
83 | * | |
84 | * - You must clearly notify users that your are distributing | |
85 | * a modified version and not the original Harvest software. | |
86 | * | |
87 | * - Any derivative product is also subject to these copyright | |
88 | * and use restrictions. | |
89 | * | |
90 | * Note that the Harvest software is NOT in the public domain. We | |
91 | * retain copyright, as specified above. | |
92 | * | |
93 | * HISTORY OF FREE SOFTWARE STATUS | |
94 | * | |
95 | * Originally we required sites to license the software in cases | |
96 | * where they were going to build commercial products/services | |
97 | * around Harvest. In June 1995 we changed this policy. We now | |
98 | * allow people to use the core Harvest software (the code found in | |
99 | * the Harvest ``src/'' directory) for free. We made this change | |
100 | * in the interest of encouraging the widest possible deployment of | |
101 | * the technology. The Harvest software is really a reference | |
102 | * implementation of a set of protocols and formats, some of which | |
103 | * we intend to standardize. We encourage commercial | |
104 | * re-implementations of code complying to this set of standards. | |
019dd986 | 105 | */ |
090089c4 | 106 | |
44a47c6e | 107 | #include "squid.h" |
090089c4 | 108 | |
429fdbec | 109 | /* count mcast group peers every 15 minutes */ |
110 | #define MCAST_COUNT_RATE 900 | |
111 | ||
f5b8bbc4 | 112 | static int peerAllowedToUse(const peer *, request_t *); |
113 | static int peerHTTPOkay(const peer *, request_t *); | |
114 | static int peerWouldBePinged(const peer *, request_t *); | |
115 | static void neighborRemove(peer *); | |
ea3a2a69 | 116 | static peer *whichPeer(const struct sockaddr_in *from); |
f5b8bbc4 | 117 | static void neighborAlive(peer *, const MemObject *, const icp_common_t *); |
118 | static void neighborCountIgnored(peer *, icp_opcode op_unused); | |
119 | static void peerRefreshDNS(void *); | |
b69f7771 | 120 | static IPH peerDNSConfigure; |
f5b8bbc4 | 121 | static void peerCheckConnect(void *); |
b69f7771 | 122 | static IPH peerCheckConnect2; |
603a02fd | 123 | static CNCB peerCheckConnectDone; |
f5b8bbc4 | 124 | static void peerCountMcastPeersDone(void *data); |
125 | static void peerCountMcastPeersStart(void *data); | |
126 | static void peerCountMcastPeersSchedule(peer * p, time_t when); | |
b3264694 | 127 | static IRCB peerCountHandleIcpReply; |
f5b8bbc4 | 128 | static void neighborIgnoreNonPeer(const struct sockaddr_in *, icp_opcode); |
ed7f5615 | 129 | static OBJH neighborDumpPeers; |
130 | static OBJH neighborDumpNonPeers; | |
131 | static void dump_peers(StoreEntry * sentry, peer * peers); | |
090089c4 | 132 | |
090089c4 | 133 | static icp_common_t echo_hdr; |
30a4f2a8 | 134 | static u_short echo_port; |
30a4f2a8 | 135 | |
c7a3724d | 136 | static int NLateReplies = 0; |
40a1495e | 137 | static peer *first_ping = NULL; |
28070024 | 138 | |
c7a3724d | 139 | char * |
b69f7771 | 140 | neighborTypeStr(const peer * p) |
69a71bd7 | 141 | { |
e102ebda | 142 | if (p->type == PEER_NONE) |
143 | return "Non-Peer"; | |
b69f7771 | 144 | if (p->type == PEER_SIBLING) |
69a71bd7 | 145 | return "Sibling"; |
b69f7771 | 146 | if (p->type == PEER_MULTICAST) |
7b3bd12c | 147 | return "Multicast Group"; |
69a71bd7 | 148 | return "Parent"; |
149 | } | |
150 | ||
090089c4 | 151 | |
deb79f06 | 152 | static peer * |
153 | whichPeer(const struct sockaddr_in *from) | |
090089c4 | 154 | { |
22e4fa85 | 155 | int j; |
4eda6afe | 156 | u_short port = ntohs(from->sin_port); |
157 | struct in_addr ip = from->sin_addr; | |
b69f7771 | 158 | peer *p = NULL; |
a3d5953d | 159 | debug(15, 3) ("whichPeer: from %s port %d\n", inet_ntoa(ip), port); |
40a1495e | 160 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 161 | for (j = 0; j < p->n_addresses; j++) { |
162 | if (ip.s_addr == p->addresses[j].s_addr && port == p->icp_port) { | |
163 | return p; | |
090089c4 | 164 | } |
165 | } | |
166 | } | |
4eda6afe | 167 | return NULL; |
090089c4 | 168 | } |
169 | ||
b6c0e933 | 170 | static peer_t |
b69f7771 | 171 | neighborType(const peer * p, const request_t * request) |
24a1003d | 172 | { |
b012353a | 173 | const struct _domain_type *d = NULL; |
b69f7771 | 174 | for (d = p->typelist; d; d = d->next) { |
24a1003d | 175 | if (matchDomainName(d->domain, request->host)) |
deb79f06 | 176 | if (d->type != PEER_NONE) |
b012353a | 177 | return d->type; |
24a1003d | 178 | } |
b69f7771 | 179 | return p->type; |
24a1003d | 180 | } |
181 | ||
7b3bd12c | 182 | /* |
62fd6124 | 183 | * peerAllowedToUse |
7b3bd12c | 184 | * |
dd4bd44e | 185 | * this function figures out if it is appropriate to fetch REQUEST |
62fd6124 | 186 | * from PEER. |
7b3bd12c | 187 | */ |
b8d8561b | 188 | static int |
b69f7771 | 189 | peerAllowedToUse(const peer * p, request_t * request) |
090089c4 | 190 | { |
b012353a | 191 | const struct _domain_ping *d = NULL; |
090089c4 | 192 | int do_ping = 1; |
0ee4272b | 193 | const struct _acl_list *a = NULL; |
f88bb09c | 194 | aclCheck_t checklist; |
ce66013b | 195 | assert(request != NULL); |
79a15e0a | 196 | if (EBIT_TEST(request->flags, REQ_NOCACHE)) |
b69f7771 | 197 | if (neighborType(p, request) == PEER_SIBLING) |
24a1003d | 198 | return 0; |
79a15e0a | 199 | if (EBIT_TEST(request->flags, REQ_REFRESH)) |
b69f7771 | 200 | if (neighborType(p, request) == PEER_SIBLING) |
d950cec8 | 201 | return 0; |
b69f7771 | 202 | if (p->pinglist == NULL && p->acls == NULL) |
090089c4 | 203 | return do_ping; |
090089c4 | 204 | do_ping = 0; |
b69f7771 | 205 | for (d = p->pinglist; d; d = d->next) { |
130faaed | 206 | if (matchDomainName(d->domain, request->host)) { |
207 | do_ping = d->do_ping; | |
208 | break; | |
209 | } | |
30a4f2a8 | 210 | do_ping = !d->do_ping; |
211 | } | |
130faaed | 212 | if (0 == do_ping) |
213 | return do_ping; | |
8ae8bb05 | 214 | checklist.src_addr = request->client_addr; |
f88bb09c | 215 | checklist.request = request; |
b69f7771 | 216 | for (a = p->acls; a; a = a->next) { |
130faaed | 217 | if (aclMatchAcl(a->acl, &checklist)) { |
218 | do_ping = a->op; | |
219 | break; | |
220 | } | |
30a4f2a8 | 221 | do_ping = !a->op; |
090089c4 | 222 | } |
223 | return do_ping; | |
224 | } | |
225 | ||
62fd6124 | 226 | /* Return TRUE if it is okay to send an ICP request to this peer. */ |
227 | static int | |
b69f7771 | 228 | peerWouldBePinged(const peer * p, request_t * request) |
62fd6124 | 229 | { |
b69f7771 | 230 | if (!peerAllowedToUse(p, request)) |
62fd6124 | 231 | return 0; |
a369131d | 232 | if (EBIT_TEST(p->options, NEIGHBOR_NO_QUERY)) |
62fd6124 | 233 | return 0; |
a369131d | 234 | if (EBIT_TEST(p->options, NEIGHBOR_MCAST_RESPONDER)) |
62fd6124 | 235 | return 0; |
236 | /* the case below seems strange, but can happen if the | |
237 | * URL host is on the other side of a firewall */ | |
b69f7771 | 238 | if (p->type == PEER_SIBLING) |
79a15e0a | 239 | if (!EBIT_TEST(request->flags, REQ_HIERARCHICAL)) |
62fd6124 | 240 | return 0; |
b69f7771 | 241 | if (p->icp_port == echo_port) |
242 | if (!neighborUp(p)) | |
62fd6124 | 243 | return 0; |
b69f7771 | 244 | if (p->n_addresses == 0) |
dd4bd44e | 245 | return 0; |
62fd6124 | 246 | return 1; |
247 | } | |
248 | ||
249 | /* Return TRUE if it is okay to send an HTTP request to this peer. */ | |
250 | static int | |
b69f7771 | 251 | peerHTTPOkay(const peer * p, request_t * request) |
62fd6124 | 252 | { |
b69f7771 | 253 | if (!peerAllowedToUse(p, request)) |
62fd6124 | 254 | return 0; |
b69f7771 | 255 | if (!neighborUp(p)) |
62fd6124 | 256 | return 0; |
257 | return 1; | |
258 | } | |
259 | ||
3c6e634f | 260 | int |
261 | neighborsCount(request_t * request) | |
090089c4 | 262 | { |
b69f7771 | 263 | peer *p = NULL; |
090089c4 | 264 | int count = 0; |
40a1495e | 265 | for (p = Config.peers; p; p = p->next) |
b69f7771 | 266 | if (peerWouldBePinged(p, request)) |
3c6e634f | 267 | count++; |
a3d5953d | 268 | debug(15, 3) ("neighborsCount: %d\n", count); |
3c6e634f | 269 | return count; |
270 | } | |
090089c4 | 271 | |
deb79f06 | 272 | peer * |
3c6e634f | 273 | getSingleParent(request_t * request) |
274 | { | |
deb79f06 | 275 | peer *p = NULL; |
b69f7771 | 276 | peer *q = NULL; |
40a1495e | 277 | for (q = Config.peers; q; q = q->next) { |
b69f7771 | 278 | if (!peerHTTPOkay(q, request)) |
caebbe00 | 279 | continue; |
b69f7771 | 280 | if (neighborType(q, request) != PEER_PARENT) |
3c6e634f | 281 | return NULL; /* oops, found SIBLING */ |
282 | if (p) | |
283 | return NULL; /* oops, found second parent */ | |
b69f7771 | 284 | p = q; |
090089c4 | 285 | } |
a369131d | 286 | if (p != NULL && !EBIT_TEST(p->options, NEIGHBOR_NO_QUERY)) |
287 | return NULL; | |
a3d5953d | 288 | debug(15, 3) ("getSingleParent: returning %s\n", p ? p->host : "NULL"); |
3c6e634f | 289 | return p; |
090089c4 | 290 | } |
291 | ||
deb79f06 | 292 | peer * |
b8d8561b | 293 | getFirstUpParent(request_t * request) |
090089c4 | 294 | { |
b69f7771 | 295 | peer *p = NULL; |
40a1495e | 296 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 297 | if (!neighborUp(p)) |
30a4f2a8 | 298 | continue; |
b69f7771 | 299 | if (neighborType(p, request) != PEER_PARENT) |
090089c4 | 300 | continue; |
b69f7771 | 301 | if (!peerHTTPOkay(p, request)) |
e924600d | 302 | continue; |
303 | break; | |
090089c4 | 304 | } |
a3d5953d | 305 | debug(15, 3) ("getFirstUpParent: returning %s\n", p ? p->host : "NULL"); |
b69f7771 | 306 | return p; |
090089c4 | 307 | } |
308 | ||
deb79f06 | 309 | peer * |
48b38d01 | 310 | getRoundRobinParent(request_t * request) |
311 | { | |
b69f7771 | 312 | peer *p; |
313 | peer *q = NULL; | |
40a1495e | 314 | for (p = Config.peers; p; p = p->next) { |
79a15e0a | 315 | if (!EBIT_TEST(p->options, NEIGHBOR_ROUNDROBIN)) |
0c8177e6 | 316 | continue; |
b69f7771 | 317 | if (neighborType(p, request) != PEER_PARENT) |
0c8177e6 | 318 | continue; |
b69f7771 | 319 | if (!peerHTTPOkay(p, request)) |
48b38d01 | 320 | continue; |
b69f7771 | 321 | if (q && q->rr_count < p->rr_count) |
48b38d01 | 322 | continue; |
b69f7771 | 323 | q = p; |
48b38d01 | 324 | } |
b69f7771 | 325 | if (q) |
326 | q->rr_count++; | |
a3d5953d | 327 | debug(15, 3) ("getRoundRobinParent: returning %s\n", q ? q->host : "NULL"); |
b69f7771 | 328 | return q; |
48b38d01 | 329 | } |
330 | ||
deb79f06 | 331 | peer * |
5269d0bd | 332 | getDefaultParent(request_t * request) |
333 | { | |
b69f7771 | 334 | peer *p = NULL; |
40a1495e | 335 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 336 | if (neighborType(p, request) != PEER_PARENT) |
5269d0bd | 337 | continue; |
79a15e0a | 338 | if (!EBIT_TEST(p->options, NEIGHBOR_DEFAULT_PARENT)) |
5269d0bd | 339 | continue; |
b69f7771 | 340 | if (!peerHTTPOkay(p, request)) |
5269d0bd | 341 | continue; |
a3d5953d | 342 | debug(15, 3) ("getDefaultParent: returning %s\n", p->host); |
b69f7771 | 343 | return p; |
5269d0bd | 344 | } |
345 | return NULL; | |
346 | } | |
347 | ||
deb79f06 | 348 | peer * |
b69f7771 | 349 | getNextPeer(peer * p) |
090089c4 | 350 | { |
b69f7771 | 351 | return p->next; |
090089c4 | 352 | } |
353 | ||
deb79f06 | 354 | peer * |
355 | getFirstPeer(void) | |
090089c4 | 356 | { |
40a1495e | 357 | return Config.peers; |
090089c4 | 358 | } |
359 | ||
b8d8561b | 360 | static void |
deb79f06 | 361 | neighborRemove(peer * target) |
30a4f2a8 | 362 | { |
b69f7771 | 363 | peer *p = NULL; |
364 | peer **P = NULL; | |
40a1495e | 365 | p = Config.peers; |
366 | P = &Config.peers; | |
b69f7771 | 367 | while (p) { |
368 | if (target == p) | |
30a4f2a8 | 369 | break; |
b69f7771 | 370 | P = &p->next; |
371 | p = p->next; | |
372 | } | |
373 | if (p) { | |
374 | *P = p->next; | |
b69f7771 | 375 | peerDestroy(p); |
40a1495e | 376 | Config.npeers--; |
4d64d74a | 377 | } |
40a1495e | 378 | first_ping = Config.peers; |
4d64d74a | 379 | } |
380 | ||
b8d8561b | 381 | void |
382 | neighbors_open(int fd) | |
090089c4 | 383 | { |
30a4f2a8 | 384 | struct sockaddr_in name; |
30a4f2a8 | 385 | int len = sizeof(struct sockaddr_in); |
30a4f2a8 | 386 | struct servent *sep = NULL; |
30a4f2a8 | 387 | memset(&name, '\0', sizeof(struct sockaddr_in)); |
388 | if (getsockname(fd, (struct sockaddr *) &name, &len) < 0) | |
a3d5953d | 389 | debug(15, 1) ("getsockname(%d,%p,%p) failed.\n", fd, &name, &len); |
dd4bd44e | 390 | peerRefreshDNS(NULL); |
30a4f2a8 | 391 | if (0 == echo_hdr.opcode) { |
27cd7235 | 392 | echo_hdr.opcode = ICP_SECHO; |
30a4f2a8 | 393 | echo_hdr.version = ICP_VERSION_CURRENT; |
394 | echo_hdr.length = 0; | |
395 | echo_hdr.reqnum = 0; | |
396 | echo_hdr.flags = 0; | |
397 | echo_hdr.pad = 0; | |
30a4f2a8 | 398 | echo_hdr.shostid = name.sin_addr.s_addr; |
399 | sep = getservbyname("echo", "udp"); | |
400 | echo_port = sep ? ntohs((u_short) sep->s_port) : 7; | |
090089c4 | 401 | } |
c68e4e90 | 402 | first_ping = Config.peers; |
ed7f5615 | 403 | cachemgrRegister("server_list", |
404 | "Peer Cache Statistics", | |
405 | neighborDumpPeers, 0); | |
22f3fd98 | 406 | cachemgrRegister("non_peers", |
407 | "List of Unknown sites sending ICP messages", | |
408 | neighborDumpNonPeers, 0); | |
090089c4 | 409 | } |
410 | ||
b8d8561b | 411 | int |
b6c0e933 | 412 | neighborsUdpPing(request_t * request, |
641941c0 | 413 | StoreEntry * entry, |
582b6456 | 414 | IRCB * callback, |
641941c0 | 415 | void *callback_data, |
416 | int *exprep) | |
090089c4 | 417 | { |
9fb13bb6 | 418 | const char *url = storeUrl(entry); |
b6c0e933 | 419 | MemObject *mem = entry->mem_obj; |
b69f7771 | 420 | peer *p = NULL; |
090089c4 | 421 | int i; |
1061b406 | 422 | int reqnum = 0; |
6d2296d4 | 423 | int flags; |
9dee2904 | 424 | icp_common_t *query; |
429fdbec | 425 | int queries_sent = 0; |
0a0bf5db | 426 | int peers_pinged = 0; |
090089c4 | 427 | |
40a1495e | 428 | if (Config.peers == NULL) |
090089c4 | 429 | return 0; |
ce66013b | 430 | if (theOutIcpConnection < 0) |
431 | fatal("neighborsUdpPing: There is no ICP socket!"); | |
9fb13bb6 | 432 | assert(entry->swap_status == SWAPOUT_NONE); |
b6c0e933 | 433 | mem->start_ping = current_time; |
434 | mem->icp_reply_callback = callback; | |
435 | mem->ircb_data = callback_data; | |
40a1495e | 436 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
b69f7771 | 437 | if (p == NULL) |
40a1495e | 438 | p = Config.peers; |
a3d5953d | 439 | debug(15, 5) ("neighborsUdpPing: Peer %s\n", p->host); |
b69f7771 | 440 | if (!peerWouldBePinged(p, request)) |
deb79f06 | 441 | continue; /* next peer */ |
0a0bf5db | 442 | peers_pinged++; |
a3d5953d | 443 | debug(15, 4) ("neighborsUdpPing: pinging peer %s for '%s'\n", |
b69f7771 | 444 | p->host, url); |
445 | if (p->type == PEER_MULTICAST) | |
03a1ee42 | 446 | mcastSetTtl(theOutIcpConnection, p->mcast.ttl); |
9fb13bb6 | 447 | reqnum = mem->reqnum; |
3a4a63e7 | 448 | debug(15, 3) ("neighborsUdpPing: key = '%s'\n", storeKeyText(entry->key)); |
a3d5953d | 449 | debug(15, 3) ("neighborsUdpPing: reqnum = %d\n", reqnum); |
090089c4 | 450 | |
dc9d133b | 451 | #if USE_HTCP |
e8d185d2 | 452 | if (EBIT_TEST(p->options, NEIGHBOR_HTCP)) { |
1afe05c5 | 453 | debug(15, 0) ("neighborsUdpPing: sending HTCP query\n"); |
176ae152 | 454 | htcpQuery(entry, request, p); |
dc9d133b | 455 | } else |
456 | #endif | |
1afe05c5 | 457 | if (p->icp_port == echo_port) { |
a3d5953d | 458 | debug(15, 4) ("neighborsUdpPing: Looks like a dumb cache, send DECHO ping\n"); |
1061b406 | 459 | echo_hdr.reqnum = reqnum; |
27cd7235 | 460 | query = icpCreateMessage(ICP_DECHO, 0, url, reqnum, 0); |
af00901c | 461 | icpUdpSend(theOutIcpConnection, |
b69f7771 | 462 | &p->in_addr, |
9dee2904 | 463 | query, |
721b3dd8 | 464 | LOG_ICP_QUERY, |
aee4e794 | 465 | 0); |
090089c4 | 466 | } else { |
6d2296d4 | 467 | flags = 0; |
17a0a4ee | 468 | if (Config.onoff.query_icmp) |
b69f7771 | 469 | if (p->icp_version == ICP_VERSION_2) |
429fdbec | 470 | flags |= ICP_FLAG_SRC_RTT; |
27cd7235 | 471 | query = icpCreateMessage(ICP_QUERY, flags, url, reqnum, 0); |
af00901c | 472 | icpUdpSend(theOutIcpConnection, |
b69f7771 | 473 | &p->in_addr, |
9dee2904 | 474 | query, |
721b3dd8 | 475 | LOG_ICP_QUERY, |
aee4e794 | 476 | 0); |
090089c4 | 477 | } |
429fdbec | 478 | queries_sent++; |
090089c4 | 479 | |
b69f7771 | 480 | p->stats.pings_sent++; |
b69f7771 | 481 | if (p->type == PEER_MULTICAST) { |
dc835977 | 482 | /* |
483 | * set a bogus last_reply time so neighborUp() never | |
484 | * says a multicast peer is dead. | |
485 | */ | |
486 | p->stats.last_reply = squid_curtime; | |
b69f7771 | 487 | (*exprep) += p->mcast.n_replies_expected; |
ae95b16f | 488 | } else if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) { |
489 | /* | |
490 | * fake a recent reply if its been a long time since our | |
491 | * last query | |
492 | */ | |
493 | p->stats.last_reply = squid_curtime; | |
47b780e1 | 494 | } else if (neighborUp(p)) { |
495 | /* its alive, expect a reply from it */ | |
496 | (*exprep)++; | |
090089c4 | 497 | } else { |
1061b406 | 498 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ |
090089c4 | 499 | /* log it once at the threshold */ |
dc835977 | 500 | if (p->stats.logged_state == PEER_ALIVE) { |
ab4b78e9 | 501 | debug(15, 1) ("Detected DEAD %s: %s/%d/%d\n", |
b69f7771 | 502 | neighborTypeStr(p), |
503 | p->host, p->http_port, p->icp_port); | |
dc835977 | 504 | p->stats.logged_state = PEER_DEAD; |
090089c4 | 505 | } |
506 | } | |
dc835977 | 507 | p->stats.last_query = 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 | } | |
0ab965da | 542 | #endif |
429fdbec | 543 | #if LOG_ICP_NUMBERS |
544 | request->hierarchy.n_sent = peers_pinged; | |
545 | request->hierarchy.n_expect = *exprep; | |
546 | #endif | |
0a0bf5db | 547 | return peers_pinged; |
090089c4 | 548 | } |
549 | ||
26b164ac | 550 | /* lookup the digest of a given peer */ |
551 | lookup_t | |
552 | peerDigestLookup(peer *p, request_t * request, StoreEntry * entry) | |
553 | { | |
6cfa8966 | 554 | #if USE_CACHE_DIGESTS |
0c511722 | 555 | const cache_key *key = request ? storeKeyPublic(storeUrl(entry), request->method) : NULL; |
26b164ac | 556 | assert(p); |
0c511722 | 557 | assert(request); |
26b164ac | 558 | debug(15, 5) ("neighborsDigestPeerLookup: peer %s\n", p->host); |
559 | /* does the peeer have a valid digest? */ | |
560 | if (EBIT_TEST(p->digest.flags, PD_DISABLED)) { | |
561 | return LOOKUP_NONE; | |
562 | } else | |
563 | if (!peerAllowedToUse(p, request)) { | |
564 | return LOOKUP_NONE; | |
565 | } else | |
566 | if (EBIT_TEST(p->digest.flags, PD_USABLE)) { | |
567 | /* fall through; put here to have common case on top */; | |
568 | } else | |
569 | if (!EBIT_TEST(p->digest.flags, PD_INITED)) { | |
570 | peerDigestInit(p); | |
571 | return LOOKUP_NONE; | |
572 | } else { | |
573 | assert(EBIT_TEST(p->digest.flags, PD_REQUESTED)); | |
574 | return LOOKUP_NONE; | |
575 | } | |
576 | debug(15, 5) ("neighborsDigestPeerLookup: OK to lookup peer %s\n", p->host); | |
577 | assert(p->digest.cd); | |
578 | /* does digest predict a hit? */ | |
579 | if (!cacheDigestTest(p->digest.cd, key)) | |
580 | return LOOKUP_MISS; | |
581 | debug(15, 5) ("neighborsDigestPeerLookup: peer %s says HIT!\n", p->host); | |
582 | return LOOKUP_HIT; | |
583 | #endif | |
584 | return LOOKUP_NONE; | |
585 | } | |
586 | ||
587 | /* select best peer based on cache digests */ | |
a54d3f8e | 588 | peer * |
589 | neighborsDigestSelect(request_t * request, StoreEntry * entry) | |
590 | { | |
591 | peer *best_p = NULL; | |
6cfa8966 | 592 | #if USE_CACHE_DIGESTS |
a54d3f8e | 593 | const cache_key *key; |
594 | int best_rtt = 0; | |
595 | int choice_count = 0; | |
596 | int ichoice_count = 0; | |
597 | peer *p; | |
598 | int p_rtt; | |
599 | int i; | |
600 | ||
601 | key = storeKeyPublic(storeUrl(entry), request->method); | |
602 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { | |
26b164ac | 603 | lookup_t lookup; |
a54d3f8e | 604 | if (!p) |
605 | p = Config.peers; | |
606 | if (i == 1) | |
607 | first_ping = p; | |
26b164ac | 608 | lookup = peerDigestLookup(p, request, entry); |
609 | if (lookup == LOOKUP_NONE) | |
a54d3f8e | 610 | continue; |
a54d3f8e | 611 | choice_count++; |
26b164ac | 612 | if (lookup == LOOKUP_MISS) |
a54d3f8e | 613 | continue; |
26b164ac | 614 | p_rtt = netdbHostRtt(p->host); |
615 | debug(15, 5) ("neighborsDigestSelect: peer %s rtt: %d\n", | |
a54d3f8e | 616 | p->host, p_rtt); |
617 | /* is this peer better than others in terms of rtt ? */ | |
618 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { | |
619 | best_p = p; | |
620 | best_rtt = p_rtt; | |
621 | if (p_rtt) /* informative choice (aka educated guess) */ | |
622 | ichoice_count++; | |
623 | debug(15, 4) ("neighborsDigestSelect: peer %s leads with rtt %d\n", | |
624 | p->host, best_rtt); | |
625 | } | |
626 | } | |
26b164ac | 627 | debug(15, 4) ("neighborsDigestSelect: choices: %d (%d)\n", |
628 | choice_count, ichoice_count); | |
629 | peerNoteDigestLookup(request, best_p, | |
630 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); | |
a54d3f8e | 631 | request->hier.n_choices = choice_count; |
632 | request->hier.n_ichoices = ichoice_count; | |
633 | #endif | |
634 | return best_p; | |
635 | } | |
636 | ||
26b164ac | 637 | void |
638 | peerNoteDigestLookup(request_t * request, peer *p, lookup_t lookup) | |
639 | { | |
6cfa8966 | 640 | #if USE_CACHE_DIGESTS |
26b164ac | 641 | if (p) |
642 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)); | |
643 | else | |
644 | *request->hier.cd_host = '\0'; | |
645 | request->hier.cd_lookup = lookup; | |
646 | debug(15, 4) ("peerNoteDigestLookup: peer %s, lookup: %s\n", | |
647 | p ? p->host : "<none>", lookup_t_str[lookup]); | |
648 | #endif | |
649 | } | |
650 | ||
d73844ca | 651 | static void |
b69f7771 | 652 | neighborAlive(peer * p, const MemObject * mem, const icp_common_t * header) |
4eda6afe | 653 | { |
654 | int rtt; | |
655 | int n; | |
39ac34a9 | 656 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { |
ab4b78e9 | 657 | debug(15, 1) ("Detected REVIVED %s: %s/%d/%d\n", |
b69f7771 | 658 | neighborTypeStr(p), |
659 | p->host, p->http_port, p->icp_port); | |
dc835977 | 660 | p->stats.logged_state = PEER_ALIVE; |
4eda6afe | 661 | } |
dc835977 | 662 | p->stats.last_reply = squid_curtime; |
b69f7771 | 663 | n = ++p->stats.pings_acked; |
27cd7235 | 664 | if ((icp_opcode) header->opcode <= ICP_END) |
b69f7771 | 665 | p->stats.counts[header->opcode]++; |
4eda6afe | 666 | if (mem) { |
667 | rtt = tvSubMsec(mem->start_ping, current_time); | |
9e4ad609 | 668 | p->stats.rtt = intAverage(p->stats.rtt, rtt, n, RTT_AV_FACTOR); |
b69f7771 | 669 | p->icp_version = (int) header->version; |
4eda6afe | 670 | } |
671 | } | |
090089c4 | 672 | |
38792624 | 673 | static void |
79d39a72 | 674 | neighborCountIgnored(peer * p, icp_opcode opnotused) |
a7e59001 | 675 | { |
b69f7771 | 676 | if (p == NULL) |
a7e59001 | 677 | return; |
b69f7771 | 678 | p->stats.ignored_replies++; |
c7a3724d | 679 | NLateReplies++; |
a7e59001 | 680 | } |
681 | ||
e102ebda | 682 | static peer *non_peers = NULL; |
683 | ||
684 | static void | |
685 | neighborIgnoreNonPeer(const struct sockaddr_in *from, icp_opcode opcode) | |
686 | { | |
687 | peer *np; | |
688 | double x; | |
689 | for (np = non_peers; np; np = np->next) { | |
690 | if (np->in_addr.sin_addr.s_addr != from->sin_addr.s_addr) | |
691 | continue; | |
692 | if (np->in_addr.sin_port != from->sin_port) | |
693 | continue; | |
694 | break; | |
695 | } | |
696 | if (np == NULL) { | |
697 | np = xcalloc(1, sizeof(peer)); | |
698 | np->in_addr.sin_addr = from->sin_addr; | |
699 | np->in_addr.sin_port = from->sin_port; | |
700 | np->icp_port = ntohl(from->sin_port); | |
701 | np->type = PEER_NONE; | |
702 | np->host = xstrdup(inet_ntoa(from->sin_addr)); | |
703 | np->next = non_peers; | |
704 | non_peers = np; | |
705 | } | |
706 | np->stats.ignored_replies++; | |
707 | np->stats.counts[opcode]++; | |
708 | x = log(np->stats.ignored_replies) / log(10.0); | |
709 | if (0.0 != x - (double) (int) x) | |
710 | return; | |
711 | debug(15, 1) ("WARNING: Ignored %d replies from non-peer %s\n", | |
712 | np->stats.ignored_replies, np->host); | |
713 | } | |
714 | ||
429fdbec | 715 | /* ignoreMulticastReply |
716 | * | |
717 | * We want to ignore replies from multicast peers if the | |
718 | * cache_host_domain rules would normally prevent the peer | |
719 | * from being used | |
720 | */ | |
721 | static int | |
b69f7771 | 722 | ignoreMulticastReply(peer * p, MemObject * mem) |
429fdbec | 723 | { |
b69f7771 | 724 | if (p == NULL) |
429fdbec | 725 | return 0; |
79a15e0a | 726 | if (!EBIT_TEST(p->options, NEIGHBOR_MCAST_RESPONDER)) |
429fdbec | 727 | return 0; |
b69f7771 | 728 | if (peerHTTPOkay(p, mem->request)) |
429fdbec | 729 | return 0; |
730 | return 1; | |
731 | } | |
732 | ||
733 | /* I should attach these records to the entry. We take the first | |
734 | * hit we get our wait until everyone misses. The timeout handler | |
735 | * call needs to nip this shopping list or call one of the misses. | |
736 | * | |
737 | * If a hit process is already started, then sobeit | |
738 | */ | |
b8d8561b | 739 | void |
5ad33356 | 740 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const struct sockaddr_in *from) |
090089c4 | 741 | { |
b69f7771 | 742 | peer *p = NULL; |
5ad33356 | 743 | StoreEntry *entry; |
744 | MemObject *mem = NULL; | |
b6c0e933 | 745 | peer_t ntype = PEER_NONE; |
5e5126cc | 746 | char *opcode_d; |
a7e59001 | 747 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 748 | |
5ad33356 | 749 | debug(15, 6) ("neighborsUdpAck: opcode %d '%s'\n", |
750 | (int) opcode, storeKeyText(key)); | |
751 | if (NULL != (entry = storeGet(key))) | |
752 | mem = entry->mem_obj; | |
b69f7771 | 753 | if ((p = whichPeer(from))) |
754 | neighborAlive(p, mem, header); | |
27cd7235 | 755 | if (opcode > ICP_END) |
d2af9477 | 756 | return; |
27cd7235 | 757 | opcode_d = icp_opcode_str[opcode]; |
5ad33356 | 758 | /* Does the entry exist? */ |
759 | if (NULL == entry) { | |
760 | debug(12, 3) ("neighborsUdpAck: Cache key '%s' not found\n", | |
761 | storeKeyText(key)); | |
762 | neighborCountIgnored(p, opcode); | |
763 | return; | |
764 | } | |
2d1c6a4f | 765 | /* check if someone is already fetching it */ |
79a15e0a | 766 | if (EBIT_TEST(entry->flag, ENTRY_DISPATCHED)) { |
5ad33356 | 767 | debug(15, 3) ("neighborsUdpAck: '%s' already being fetched.\n", |
768 | storeKeyText(key)); | |
b69f7771 | 769 | neighborCountIgnored(p, opcode); |
d2af9477 | 770 | return; |
771 | } | |
2d1c6a4f | 772 | if (mem == NULL) { |
5ad33356 | 773 | debug(15, 2) ("Ignoring %s for missing mem_obj: %s\n", |
774 | opcode_d, storeKeyText(key)); | |
b69f7771 | 775 | neighborCountIgnored(p, opcode); |
8de2f7ad | 776 | return; |
777 | } | |
778 | if (entry->ping_status != PING_WAITING) { | |
5ad33356 | 779 | debug(15, 2) ("neighborsUdpAck: Unexpected %s for %s\n", |
780 | opcode_d, storeKeyText(key)); | |
b69f7771 | 781 | neighborCountIgnored(p, opcode); |
8de2f7ad | 782 | return; |
783 | } | |
4eda6afe | 784 | if (entry->lock_count == 0) { |
5ad33356 | 785 | debug(12, 1) ("neighborsUdpAck: '%s' has no locks\n", |
786 | storeKeyText(key)); | |
b69f7771 | 787 | neighborCountIgnored(p, opcode); |
4eda6afe | 788 | return; |
090089c4 | 789 | } |
a3d5953d | 790 | debug(15, 3) ("neighborsUdpAck: %s for '%s' from %s \n", |
5ad33356 | 791 | opcode_d, storeKeyText(key), p ? p->host : "source"); |
b69f7771 | 792 | if (p) |
793 | ntype = neighborType(p, mem->request); | |
794 | if (ignoreMulticastReply(p, mem)) { | |
795 | neighborCountIgnored(p, opcode); | |
27cd7235 | 796 | } else if (opcode == ICP_SECHO) { |
429fdbec | 797 | /* Received source-ping reply */ |
b69f7771 | 798 | if (p) { |
a3d5953d | 799 | debug(15, 1) ("Ignoring SECHO from neighbor %s\n", p->host); |
b69f7771 | 800 | neighborCountIgnored(p, opcode); |
429fdbec | 801 | } else { |
802 | /* if we reach here, source-ping reply is the first 'parent', | |
803 | * so fetch directly from the source */ | |
a3d5953d | 804 | debug(15, 6) ("Source is the first to respond.\n"); |
b3264694 | 805 | mem->icp_reply_callback(NULL, ntype, header, mem->ircb_data); |
429fdbec | 806 | } |
27cd7235 | 807 | } else if (opcode == ICP_MISS) { |
b69f7771 | 808 | if (p == NULL) { |
e102ebda | 809 | neighborIgnoreNonPeer(from, opcode); |
d2af9477 | 810 | } else { |
b3264694 | 811 | mem->icp_reply_callback(p, ntype, header, mem->ircb_data); |
30a4f2a8 | 812 | } |
a7c05555 | 813 | } else if (opcode == ICP_HIT) { |
b69f7771 | 814 | if (p == NULL) { |
e102ebda | 815 | neighborIgnoreNonPeer(from, opcode); |
d2af9477 | 816 | } else { |
27cd7235 | 817 | header->opcode = ICP_HIT; |
b3264694 | 818 | mem->icp_reply_callback(p, ntype, header, mem->ircb_data); |
090089c4 | 819 | } |
27cd7235 | 820 | } else if (opcode == ICP_DECHO) { |
b69f7771 | 821 | if (p == NULL) { |
e102ebda | 822 | neighborIgnoreNonPeer(from, opcode); |
deb79f06 | 823 | } else if (ntype == PEER_SIBLING) { |
5e604a0e | 824 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); |
825 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
090089c4 | 826 | } else { |
b3264694 | 827 | mem->icp_reply_callback(p, ntype, header, mem->ircb_data); |
090089c4 | 828 | } |
27cd7235 | 829 | } else if (opcode == ICP_SECHO) { |
b69f7771 | 830 | if (p) { |
a3d5953d | 831 | debug(15, 1) ("Ignoring SECHO from neighbor %s\n", p->host); |
b69f7771 | 832 | neighborCountIgnored(p, opcode); |
0ab965da | 833 | #if ALLOW_SOURCE_PING |
834 | } else if (Config.onoff.source_ping) { | |
b3264694 | 835 | mem->icp_reply_callback(NULL, ntype, header, mem->ircb_data); |
0ab965da | 836 | #endif |
837 | } else { | |
838 | debug(15, 1) ("Unsolicited SECHO from %s\n", inet_ntoa(from->sin_addr)); | |
090089c4 | 839 | } |
27cd7235 | 840 | } else if (opcode == ICP_DENIED) { |
b69f7771 | 841 | if (p == NULL) { |
e102ebda | 842 | neighborIgnoreNonPeer(from, opcode); |
b69f7771 | 843 | } else if (p->stats.pings_acked > 100) { |
27cd7235 | 844 | if (100 * p->stats.counts[ICP_DENIED] / p->stats.pings_acked > 95) { |
a3d5953d | 845 | debug(15, 0) ("95%% of replies from '%s' are UDP_DENIED\n", p->host); |
846 | debug(15, 0) ("Disabling '%s', please check your configuration.\n", p->host); | |
b69f7771 | 847 | neighborRemove(p); |
848 | p = NULL; | |
e006d372 | 849 | } else { |
b69f7771 | 850 | neighborCountIgnored(p, opcode); |
30a4f2a8 | 851 | } |
852 | } | |
27cd7235 | 853 | } else if (opcode == ICP_MISS_NOFETCH) { |
b3264694 | 854 | mem->icp_reply_callback(p, ntype, header, mem->ircb_data); |
090089c4 | 855 | } else { |
a3d5953d | 856 | debug(15, 0) ("neighborsUdpAck: Unexpected ICP reply: %s\n", opcode_d); |
d2af9477 | 857 | } |
090089c4 | 858 | } |
859 | ||
deb79f06 | 860 | peer * |
40a1495e | 861 | peerFindByName(const char *name) |
98ffb7e4 | 862 | { |
b69f7771 | 863 | peer *p = NULL; |
40a1495e | 864 | for (p = Config.peers; p; p = p->next) { |
b69f7771 | 865 | if (!strcasecmp(name, p->host)) |
98ffb7e4 | 866 | break; |
867 | } | |
b69f7771 | 868 | return p; |
98ffb7e4 | 869 | } |
b012353a | 870 | |
5269d0bd | 871 | int |
b69f7771 | 872 | neighborUp(const peer * p) |
5269d0bd | 873 | { |
b69f7771 | 874 | if (!p->tcp_up) |
e924600d | 875 | return 0; |
ae95b16f | 876 | if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) |
dc835977 | 877 | return 1; |
878 | if (p->stats.last_query - p->stats.last_reply >= Config.Timeout.deadPeer) | |
5269d0bd | 879 | return 0; |
880 | return 1; | |
881 | } | |
882 | ||
e6e3b09b | 883 | void |
b69f7771 | 884 | peerDestroy(peer * p) |
e6e3b09b | 885 | { |
ee4a1f5d | 886 | struct _domain_ping *l = NULL; |
887 | struct _domain_ping *nl = NULL; | |
b69f7771 | 888 | if (p == NULL) |
3c6e634f | 889 | return; |
b69f7771 | 890 | if (p->type == PEER_MULTICAST) { |
891 | if (p->mcast.flags & PEER_COUNT_EVENT_PENDING) | |
892 | eventDelete(peerCountMcastPeersStart, p); | |
893 | if (p->mcast.flags & PEER_COUNTING) | |
894 | eventDelete(peerCountMcastPeersDone, p); | |
895 | } | |
896 | for (l = p->pinglist; l; l = nl) { | |
ee4a1f5d | 897 | nl = l->next; |
898 | safe_free(l->domain); | |
899 | safe_free(l); | |
900 | } | |
b69f7771 | 901 | safe_free(p->host); |
8407afee | 902 | cbdataFree(p); |
e6e3b09b | 903 | } |
c7a3724d | 904 | |
dd4bd44e | 905 | static void |
03a1ee42 | 906 | peerDNSConfigure(const ipcache_addrs * ia, void *data) |
dd4bd44e | 907 | { |
b69f7771 | 908 | peer *p = data; |
dd4bd44e | 909 | struct sockaddr_in *ap; |
910 | int j; | |
b69f7771 | 911 | if (p->n_addresses == 0) { |
a3d5953d | 912 | debug(15, 1) ("Configuring %s %s/%d/%d\n", neighborTypeStr(p), |
b69f7771 | 913 | p->host, p->http_port, p->icp_port); |
914 | if (p->type == PEER_MULTICAST) | |
a3d5953d | 915 | debug(15, 1) (" Multicast TTL = %d\n", p->mcast.ttl); |
b69f7771 | 916 | } |
917 | p->n_addresses = 0; | |
dd4bd44e | 918 | if (ia == NULL) { |
a3d5953d | 919 | debug(0, 0) ("WARNING: DNS lookup for '%s' failed!\n", p->host); |
dd4bd44e | 920 | return; |
921 | } | |
c04fe656 | 922 | if ((int) ia->count < 1) { |
a3d5953d | 923 | debug(0, 0) ("WARNING: No IP address found for '%s'!\n", p->host); |
dd4bd44e | 924 | return; |
925 | } | |
c04fe656 | 926 | for (j = 0; j < (int) ia->count && j < PEER_MAX_ADDRESSES; j++) { |
b69f7771 | 927 | p->addresses[j] = ia->in_addrs[j]; |
a3d5953d | 928 | debug(15, 2) ("--> IP address #%d: %s\n", j, inet_ntoa(p->addresses[j])); |
b69f7771 | 929 | p->n_addresses++; |
dd4bd44e | 930 | } |
b69f7771 | 931 | ap = &p->in_addr; |
dd4bd44e | 932 | memset(ap, '\0', sizeof(struct sockaddr_in)); |
933 | ap->sin_family = AF_INET; | |
b69f7771 | 934 | ap->sin_addr = p->addresses[0]; |
935 | ap->sin_port = htons(p->icp_port); | |
936 | if (p->type == PEER_MULTICAST) | |
937 | peerCountMcastPeersSchedule(p, 10); | |
dd4bd44e | 938 | } |
939 | ||
940 | static void | |
79d39a72 | 941 | peerRefreshDNS(void *datanotused) |
dd4bd44e | 942 | { |
b69f7771 | 943 | peer *p = NULL; |
40a1495e | 944 | peer *next = Config.peers; |
79d39a72 | 945 | while ((p = next) != NULL) { |
b69f7771 | 946 | next = p->next; |
429fdbec | 947 | /* some random, bogus FD for ipcache */ |
03a1ee42 | 948 | p->test_fd = Squid_MaxFD + current_time.tv_usec; |
8407afee | 949 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); |
dd4bd44e | 950 | } |
951 | /* Reconfigure the peers every hour */ | |
952 | eventAdd("peerRefreshDNS", peerRefreshDNS, NULL, 3600); | |
953 | } | |
e924600d | 954 | |
955 | static void | |
956 | peerCheckConnect(void *data) | |
957 | { | |
958 | peer *p = data; | |
959 | int fd; | |
90e675a6 | 960 | int valid = cbdataValid(p); |
961 | cbdataUnlock(p); | |
962 | if (!valid) | |
963 | return; | |
e924600d | 964 | fd = comm_open(SOCK_STREAM, 0, Config.Addrs.tcp_outgoing, |
965 | 0, COMM_NONBLOCKING, p->host); | |
966 | if (fd < 0) | |
967 | return; | |
03a1ee42 | 968 | p->test_fd = fd; |
8407afee | 969 | ipcache_nbgethostbyname(p->host, peerCheckConnect2, p); |
e924600d | 970 | } |
971 | ||
972 | static void | |
79d39a72 | 973 | peerCheckConnect2(const ipcache_addrs * ianotused, void *data) |
e924600d | 974 | { |
975 | peer *p = data; | |
03a1ee42 | 976 | commConnectStart(p->test_fd, |
e924600d | 977 | p->host, |
978 | p->http_port, | |
979 | peerCheckConnectDone, | |
980 | p); | |
981 | } | |
982 | ||
983 | static void | |
984 | peerCheckConnectDone(int fd, int status, void *data) | |
985 | { | |
986 | peer *p = data; | |
987 | p->tcp_up = status == COMM_OK ? 1 : 0; | |
988 | if (p->tcp_up) { | |
a3d5953d | 989 | debug(15, 0) ("TCP connection to %s/%d succeeded\n", |
e924600d | 990 | p->host, p->http_port); |
991 | } else { | |
90e675a6 | 992 | cbdataLock(p); |
e924600d | 993 | eventAdd("peerCheckConnect", peerCheckConnect, p, 80); |
994 | } | |
995 | comm_close(fd); | |
996 | return; | |
997 | } | |
998 | ||
999 | void | |
1000 | peerCheckConnectStart(peer * p) | |
1001 | { | |
1002 | if (!p->tcp_up) | |
1003 | return; | |
a3d5953d | 1004 | debug(15, 0) ("TCP connection to %s/%d failed\n", p->host, p->http_port); |
e924600d | 1005 | p->tcp_up = 0; |
1006 | p->last_fail_time = squid_curtime; | |
90e675a6 | 1007 | cbdataLock(p); |
e924600d | 1008 | eventAdd("peerCheckConnect", peerCheckConnect, p, 80); |
1009 | } | |
429fdbec | 1010 | |
1011 | static void | |
1012 | peerCountMcastPeersSchedule(peer * p, time_t when) | |
1013 | { | |
1014 | if (p->mcast.flags & PEER_COUNT_EVENT_PENDING) | |
1015 | return; | |
1016 | eventAdd("peerCountMcastPeersStart", | |
1017 | peerCountMcastPeersStart, | |
1018 | p, | |
1019 | when); | |
1020 | p->mcast.flags |= PEER_COUNT_EVENT_PENDING; | |
1021 | } | |
1022 | ||
1023 | static void | |
1024 | peerCountMcastPeersStart(void *data) | |
1025 | { | |
1026 | peer *p = data; | |
1027 | ps_state *psstate = xcalloc(1, sizeof(ps_state)); | |
1028 | StoreEntry *fake; | |
1029 | MemObject *mem; | |
1030 | icp_common_t *query; | |
1031 | LOCAL_ARRAY(char, url, MAX_URL); | |
ce66013b | 1032 | assert(p->type == PEER_MULTICAST); |
429fdbec | 1033 | p->mcast.flags &= ~PEER_COUNT_EVENT_PENDING; |
042461c3 | 1034 | snprintf(url, MAX_URL, "http://%s/", inet_ntoa(p->in_addr.sin_addr)); |
88738790 | 1035 | fake = storeCreateEntry(url, url, 0, METHOD_GET); |
429fdbec | 1036 | psstate->request = requestLink(urlParse(METHOD_GET, url)); |
1037 | psstate->entry = fake; | |
1038 | psstate->callback = NULL; | |
1039 | psstate->fail_callback = NULL; | |
1040 | psstate->callback_data = p; | |
1041 | psstate->icp.start = current_time; | |
1042 | mem = fake->mem_obj; | |
2db609de | 1043 | mem->request = requestLink(psstate->request); |
429fdbec | 1044 | mem->start_ping = current_time; |
1045 | mem->icp_reply_callback = peerCountHandleIcpReply; | |
1046 | mem->ircb_data = psstate; | |
03a1ee42 | 1047 | mcastSetTtl(theOutIcpConnection, p->mcast.ttl); |
9fb13bb6 | 1048 | p->mcast.reqnum = mem->reqnum; |
27cd7235 | 1049 | query = icpCreateMessage(ICP_QUERY, 0, url, p->mcast.reqnum, 0); |
429fdbec | 1050 | icpUdpSend(theOutIcpConnection, |
1051 | &p->in_addr, | |
1052 | query, | |
721b3dd8 | 1053 | LOG_ICP_QUERY, |
aee4e794 | 1054 | 0); |
429fdbec | 1055 | fake->ping_status = PING_WAITING; |
1056 | eventAdd("peerCountMcastPeersDone", | |
1057 | peerCountMcastPeersDone, | |
2db609de | 1058 | psstate, |
429fdbec | 1059 | Config.neighborTimeout); |
1060 | p->mcast.flags |= PEER_COUNTING; | |
1061 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); | |
1062 | } | |
1063 | ||
1064 | static void | |
1065 | peerCountMcastPeersDone(void *data) | |
1066 | { | |
1067 | ps_state *psstate = data; | |
1068 | peer *p = psstate->callback_data; | |
1069 | StoreEntry *fake = psstate->entry; | |
429fdbec | 1070 | p->mcast.flags &= ~PEER_COUNTING; |
9e4ad609 | 1071 | p->mcast.avg_n_members = doubleAverage(p->mcast.avg_n_members, |
1072 | (double) psstate->icp.n_recv, | |
1073 | ++p->mcast.n_times_counted, | |
1074 | 10); | |
a3d5953d | 1075 | debug(15, 1) ("Group %s: %d replies, %4.1f average\n", |
429fdbec | 1076 | p->host, |
1077 | psstate->icp.n_recv, | |
1078 | p->mcast.avg_n_members); | |
1079 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; | |
1080 | fake->store_status = STORE_ABORTED; | |
e7a22b88 | 1081 | requestUnlink(fake->mem_obj->request); |
f0d5043e | 1082 | fake->mem_obj->request = NULL; |
429fdbec | 1083 | storeReleaseRequest(fake); |
1084 | storeUnlockObject(fake); | |
e7a22b88 | 1085 | requestUnlink(psstate->request); |
2db609de | 1086 | xfree(psstate); |
429fdbec | 1087 | } |
1088 | ||
1089 | static void | |
79d39a72 | 1090 | peerCountHandleIcpReply(peer * pnotused, peer_t type, icp_common_t * hdrnotused, void *data) |
429fdbec | 1091 | { |
1092 | ps_state *psstate = data; | |
1093 | psstate->icp.n_recv++; | |
429fdbec | 1094 | } |
ed7f5615 | 1095 | |
1096 | static void | |
1097 | neighborDumpPeers(StoreEntry * sentry) | |
1098 | { | |
1099 | dump_peers(sentry, Config.peers); | |
1100 | } | |
1101 | ||
1102 | static void | |
1103 | neighborDumpNonPeers(StoreEntry * sentry) | |
1104 | { | |
1105 | dump_peers(sentry, non_peers); | |
1106 | } | |
1107 | ||
a369131d | 1108 | void |
1109 | dump_peer_options(StoreEntry * sentry, peer * p) | |
1110 | { | |
1111 | if (EBIT_TEST(p->options, NEIGHBOR_PROXY_ONLY)) | |
1112 | storeAppendPrintf(sentry, " proxy-only"); | |
1113 | if (EBIT_TEST(p->options, NEIGHBOR_NO_QUERY)) | |
1114 | storeAppendPrintf(sentry, " no-query"); | |
8638fc66 | 1115 | if (EBIT_TEST(p->options, NEIGHBOR_NO_DIGEST)) |
1116 | storeAppendPrintf(sentry, " no-digest"); | |
a369131d | 1117 | if (EBIT_TEST(p->options, NEIGHBOR_DEFAULT_PARENT)) |
1118 | storeAppendPrintf(sentry, " default"); | |
1119 | if (EBIT_TEST(p->options, NEIGHBOR_ROUNDROBIN)) | |
1120 | storeAppendPrintf(sentry, " round-robin"); | |
1121 | if (EBIT_TEST(p->options, NEIGHBOR_MCAST_RESPONDER)) | |
1122 | storeAppendPrintf(sentry, " multicast-responder"); | |
1123 | if (EBIT_TEST(p->options, NEIGHBOR_CLOSEST_ONLY)) | |
1124 | storeAppendPrintf(sentry, " closest-only"); | |
dc9d133b | 1125 | #if USE_HTCP |
e8d185d2 | 1126 | if (EBIT_TEST(p->options, NEIGHBOR_HTCP)) |
1127 | storeAppendPrintf(sentry, " htcp"); | |
dc9d133b | 1128 | #endif |
a369131d | 1129 | if (p->mcast.ttl > 0) |
1130 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); | |
1131 | storeAppendPrintf(sentry, "\n"); | |
1132 | } | |
1133 | ||
ed7f5615 | 1134 | static void |
1135 | dump_peers(StoreEntry * sentry, peer * peers) | |
1136 | { | |
1137 | peer *e = NULL; | |
1138 | struct _domain_ping *d = NULL; | |
1139 | icp_opcode op; | |
06e6d12a | 1140 | int i; |
ed7f5615 | 1141 | if (peers == NULL) |
1142 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); | |
1143 | for (e = peers; e; e = e->next) { | |
1144 | assert(e->host != NULL); | |
1145 | storeAppendPrintf(sentry, "\n%-11.11s: %s/%d/%d\n", | |
1146 | neighborTypeStr(e), | |
1147 | e->host, | |
1148 | e->http_port, | |
1149 | e->icp_port); | |
a369131d | 1150 | storeAppendPrintf(sentry, "Flags :"); |
1151 | dump_peer_options(sentry, e); | |
06e6d12a | 1152 | for (i = 0; i < e->n_addresses; i++) { |
1153 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, | |
1154 | inet_ntoa(e->addresses[i])); | |
1155 | } | |
ed7f5615 | 1156 | storeAppendPrintf(sentry, "Status : %s\n", |
1157 | neighborUp(e) ? "Up" : "Down"); | |
1158 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
1159 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", | |
1160 | (int) (squid_curtime - e->stats.last_query)); | |
1161 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1162 | (int) (squid_curtime - e->stats.last_reply)); | |
1163 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1164 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1165 | e->stats.pings_acked, | |
1166 | percent(e->stats.pings_acked, e->stats.pings_sent)); | |
1167 | storeAppendPrintf(sentry, "FETCHES : %8d %3d%%\n", | |
1168 | e->stats.fetches, | |
1169 | percent(e->stats.fetches, e->stats.pings_acked)); | |
1170 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", | |
1171 | e->stats.ignored_replies, | |
1172 | percent(e->stats.ignored_replies, e->stats.pings_acked)); | |
1173 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1174 | for (op = ICP_INVALID; op < ICP_END; op++) { | |
1175 | if (e->stats.counts[op] == 0) | |
1176 | continue; | |
1177 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1178 | icp_opcode_str[op], | |
1179 | e->stats.counts[op], | |
1180 | percent(e->stats.counts[op], e->stats.pings_acked)); | |
1181 | } | |
1182 | if (e->last_fail_time) { | |
1183 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", | |
1184 | mkhttpdlogtime(&(e->last_fail_time))); | |
1185 | } | |
1186 | if (e->pinglist != NULL) | |
1187 | storeAppendPrintf(sentry, "DOMAIN LIST: "); | |
1188 | for (d = e->pinglist; d; d = d->next) { | |
1189 | if (d->do_ping) | |
1190 | storeAppendPrintf(sentry, "%s ", d->domain); | |
1191 | else | |
1192 | storeAppendPrintf(sentry, "!%s ", d->domain); | |
1193 | } | |
035f5831 | 1194 | storeAppendPrintf(sentry, "\n"); |
ed7f5615 | 1195 | storeAppendPrintf(sentry, "Keep-Alive Ratio: %d%%\n", |
1196 | percent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); | |
1197 | } | |
1198 | } |