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194dd3b8 | 1 | |
9cef6668 | 2 | /* |
5cafad19 | 3 | * $Id: icp_v2.cc,v 1.89 2006/01/19 18:40:28 wessels Exp $ |
9cef6668 | 4 | * |
5 | * DEBUG: section 12 Internet Cache Protocol | |
6 | * AUTHOR: Duane Wessels | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
9cef6668 | 9 | * ---------------------------------------------------------- |
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. | |
9cef6668 | 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 | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
33 | * | |
34 | */ | |
35 | ||
7a2f978b | 36 | #include "squid.h" |
e6ccf245 | 37 | #include "Store.h" |
063dc1eb | 38 | #include "comm.h" |
e6ccf245 | 39 | #include "ICP.h" |
528b2c61 | 40 | #include "HttpRequest.h" |
4fb35c3c | 41 | #include "ACLChecklist.h" |
b0dd28ba | 42 | #include "ACL.h" |
450e0c10 | 43 | #include "AccessLogEntry.h" |
7a2f978b | 44 | |
ddfcbc22 | 45 | static void icpLogIcp(struct IN_ADDR, log_type, int, const char *, int); |
62e76326 | 46 | |
7a2f978b | 47 | static void icpHandleIcpV2(int, struct sockaddr_in, char *, int); |
071a3ae7 | 48 | static void icpCount(void *, int, size_t, int); |
17b6e784 | 49 | |
48382032 | 50 | /* |
51 | * IcpQueueHead is global so comm_incoming() knows whether or not | |
52 | * to call icpUdpSendQueue. | |
53 | */ | |
54 | static icpUdpData *IcpQueueTail = NULL; | |
d4cb310b | 55 | static icpUdpData *IcpQueueHead = NULL; |
7a2f978b | 56 | |
e6ccf245 | 57 | /* icp_common_t */ |
58 | _icp_common_t::_icp_common_t() : opcode(ICP_INVALID), version(0), length(0), reqnum(0), flags(0), pad(0), shostid(0) | |
62e76326 | 59 | {} |
e6ccf245 | 60 | |
61 | _icp_common_t::_icp_common_t(char *buf, unsigned int len) | |
62 | { | |
63 | if (len < sizeof(_icp_common_t)) { | |
62e76326 | 64 | /* mark as invalid */ |
65 | length = len + 1; | |
66 | return; | |
e6ccf245 | 67 | } |
62e76326 | 68 | |
e6ccf245 | 69 | xmemcpy(this, buf, sizeof(icp_common_t)); |
70 | /* | |
71 | * Convert network order sensitive fields | |
72 | */ | |
73 | length = ntohs(length); | |
74 | reqnum = ntohl(reqnum); | |
75 | flags = ntohl(flags); | |
76 | pad = ntohl(pad); | |
77 | } | |
78 | ||
79 | icp_opcode | |
80 | _icp_common_t::getOpCode() const | |
81 | { | |
82 | if (opcode > (char)ICP_END) | |
62e76326 | 83 | return ICP_INVALID; |
84 | ||
e6ccf245 | 85 | return (icp_opcode)opcode; |
86 | } | |
87 | ||
88 | /* ICPState */ | |
89 | ||
90 | ICPState:: ICPState(icp_common_t & aHeader):header(aHeader) | |
62e76326 | 91 | ,request(NULL), |
92 | fd(-1), | |
93 | url(NULL) | |
94 | {} | |
e6ccf245 | 95 | |
96 | ICPState::~ICPState() | |
97 | { | |
98 | safe_free(url); | |
62e76326 | 99 | |
e6ccf245 | 100 | if (request) |
5cafad19 | 101 | delete request; |
e6ccf245 | 102 | } |
103 | ||
104 | ||
105 | /* End ICPState */ | |
106 | ||
107 | /* ICP2State */ | |
62e76326 | 108 | |
109 | class ICP2State:public ICPState, public StoreClient | |
110 | { | |
111 | ||
112 | public: | |
113 | ICP2State(icp_common_t & aHeader):ICPState(aHeader),rtt(0),src_rtt(0),flags(0) | |
114 | {} | |
115 | ||
116 | ~ICP2State(); | |
e6ccf245 | 117 | void created(StoreEntry * newEntry); |
118 | ||
119 | int rtt; | |
120 | int src_rtt; | |
121 | u_int32_t flags; | |
122 | }; | |
123 | ||
124 | ICP2State::~ICP2State () | |
62e76326 | 125 | {} |
e6ccf245 | 126 | |
127 | void | |
128 | ICP2State::created (StoreEntry *newEntry) | |
129 | { | |
130 | StoreEntry *entry = newEntry->isNull () ? NULL : newEntry; | |
131 | debug(12, 5) ("icpHandleIcpV2: OPCODE %s\n", icp_opcode_str[header.opcode]); | |
132 | icp_opcode codeToSend; | |
62e76326 | 133 | |
e6ccf245 | 134 | if (icpCheckUdpHit(entry, request)) { |
62e76326 | 135 | codeToSend = ICP_HIT; |
e6ccf245 | 136 | } else { |
62e76326 | 137 | if (Config.onoff.test_reachability && rtt == 0) { |
138 | if ((rtt = netdbHostRtt(request->host)) == 0) | |
139 | netdbPingSite(request->host); | |
140 | } | |
141 | ||
142 | if (icpGetCommonOpcode() != ICP_ERR) | |
143 | codeToSend = icpGetCommonOpcode(); | |
144 | else if (Config.onoff.test_reachability && rtt == 0) | |
145 | codeToSend = ICP_MISS_NOFETCH; | |
146 | else | |
147 | codeToSend = ICP_MISS; | |
e6ccf245 | 148 | } |
62e76326 | 149 | |
e6ccf245 | 150 | icpCreateAndSend(codeToSend, flags, url, header.reqnum, src_rtt, fd, &from); |
151 | delete this; | |
152 | } | |
153 | ||
154 | /* End ICP2State */ | |
155 | ||
7a2f978b | 156 | static void |
62e76326 | 157 | |
ddfcbc22 | 158 | icpLogIcp(struct IN_ADDR caddr, log_type logcode, int len, const char *url, int delay) |
7a2f978b | 159 | { |
7a2f978b | 160 | AccessLogEntry al; |
62e76326 | 161 | |
96c617da | 162 | if (LOG_TAG_NONE == logcode) |
62e76326 | 163 | return; |
164 | ||
071a3ae7 | 165 | if (LOG_ICP_QUERY == logcode) |
62e76326 | 166 | return; |
167 | ||
17b6e784 | 168 | clientdbUpdate(caddr, logcode, PROTO_ICP, len); |
62e76326 | 169 | |
7a2f978b | 170 | if (!Config.onoff.log_udp) |
62e76326 | 171 | return; |
172 | ||
27cd7235 | 173 | al.icp.opcode = ICP_QUERY; |
62e76326 | 174 | |
7a2f978b | 175 | al.url = url; |
62e76326 | 176 | |
17b6e784 | 177 | al.cache.caddr = caddr; |
62e76326 | 178 | |
17b6e784 | 179 | al.cache.size = len; |
62e76326 | 180 | |
17b6e784 | 181 | al.cache.code = logcode; |
62e76326 | 182 | |
17b6e784 | 183 | al.cache.msec = delay; |
62e76326 | 184 | |
7684c4b1 | 185 | accessLogLog(&al, NULL); |
7a2f978b | 186 | } |
187 | ||
48382032 | 188 | void |
17b6e784 | 189 | icpUdpSendQueue(int fd, void *unused) |
7a2f978b | 190 | { |
17b6e784 | 191 | icpUdpData *q; |
7a2f978b | 192 | int x; |
17b6e784 | 193 | int delay; |
62e76326 | 194 | |
48382032 | 195 | while ((q = IcpQueueHead) != NULL) { |
62e76326 | 196 | delay = tvSubUsec(q->queue_time, current_time); |
197 | /* increment delay to prevent looping */ | |
198 | x = icpUdpSend(fd, &q->address, (icp_common_t *) q->msg, q->logcode, ++delay); | |
199 | IcpQueueHead = q->next; | |
200 | safe_free(q); | |
201 | ||
202 | if (x < 0) | |
203 | break; | |
7a2f978b | 204 | } |
205 | } | |
206 | ||
e6ccf245 | 207 | _icp_common_t * |
208 | _icp_common_t::createMessage( | |
7a2f978b | 209 | icp_opcode opcode, |
210 | int flags, | |
211 | const char *url, | |
212 | int reqnum, | |
213 | int pad) | |
214 | { | |
215 | char *buf = NULL; | |
216 | icp_common_t *headerp = NULL; | |
217 | char *urloffset = NULL; | |
218 | int buf_len; | |
219 | buf_len = sizeof(icp_common_t) + strlen(url) + 1; | |
62e76326 | 220 | |
27cd7235 | 221 | if (opcode == ICP_QUERY) |
62e76326 | 222 | buf_len += sizeof(u_int32_t); |
223 | ||
e6ccf245 | 224 | buf = (char *) xcalloc(buf_len, 1); |
62e76326 | 225 | |
7a2f978b | 226 | headerp = (icp_common_t *) (void *) buf; |
62e76326 | 227 | |
79d39a72 | 228 | headerp->opcode = (char) opcode; |
62e76326 | 229 | |
7a2f978b | 230 | headerp->version = ICP_VERSION_CURRENT; |
62e76326 | 231 | |
a9245686 | 232 | headerp->length = (u_int16_t) htons(buf_len); |
62e76326 | 233 | |
7a2f978b | 234 | headerp->reqnum = htonl(reqnum); |
62e76326 | 235 | |
7a2f978b | 236 | headerp->flags = htonl(flags); |
62e76326 | 237 | |
7a2f978b | 238 | headerp->pad = htonl(pad); |
62e76326 | 239 | |
67129385 | 240 | headerp->shostid = theOutICPAddr.s_addr; |
62e76326 | 241 | |
7a2f978b | 242 | urloffset = buf + sizeof(icp_common_t); |
62e76326 | 243 | |
27cd7235 | 244 | if (opcode == ICP_QUERY) |
62e76326 | 245 | urloffset += sizeof(u_int32_t); |
246 | ||
7a2f978b | 247 | xmemcpy(urloffset, url, strlen(url)); |
62e76326 | 248 | |
e6ccf245 | 249 | return (icp_common_t *)buf; |
7a2f978b | 250 | } |
251 | ||
17b6e784 | 252 | int |
7a2f978b | 253 | icpUdpSend(int fd, |
62e76326 | 254 | |
255 | const struct sockaddr_in *to, | |
256 | icp_common_t * msg, | |
257 | log_type logcode, | |
258 | int delay) | |
7a2f978b | 259 | { |
17b6e784 | 260 | icpUdpData *queue; |
8e68922c | 261 | int x; |
17b6e784 | 262 | int len; |
263 | len = (int) ntohs(msg->length); | |
264 | debug(12, 5) ("icpUdpSend: FD %d sending %s, %d bytes to %s:%d\n", | |
62e76326 | 265 | fd, |
266 | icp_opcode_str[msg->opcode], | |
267 | len, | |
268 | inet_ntoa(to->sin_addr), | |
269 | ntohs(to->sin_port)); | |
17b6e784 | 270 | x = comm_udp_sendto(fd, to, sizeof(*to), msg, len); |
62e76326 | 271 | |
272 | if (x >= 0) | |
273 | { | |
274 | /* successfully written */ | |
275 | icpLogIcp(to->sin_addr, logcode, len, (char *) (msg + 1), delay); | |
276 | icpCount(msg, SENT, (size_t) len, delay); | |
277 | safe_free(msg); | |
278 | } else if (0 == delay) | |
279 | { | |
280 | /* send failed, but queue it */ | |
281 | queue = (icpUdpData *) xcalloc(1, sizeof(icpUdpData)); | |
282 | queue->address = *to; | |
283 | queue->msg = msg; | |
284 | queue->len = (int) ntohs(msg->length); | |
285 | queue->queue_time = current_time; | |
286 | queue->logcode = logcode; | |
287 | ||
288 | if (IcpQueueHead == NULL) { | |
289 | IcpQueueHead = queue; | |
290 | IcpQueueTail = queue; | |
291 | } else if (IcpQueueTail == IcpQueueHead) { | |
292 | IcpQueueTail = queue; | |
293 | IcpQueueHead->next = queue; | |
294 | } else { | |
295 | IcpQueueTail->next = queue; | |
296 | IcpQueueTail = queue; | |
297 | } | |
298 | ||
299 | commSetSelect(fd, COMM_SELECT_WRITE, icpUdpSendQueue, NULL, 0); | |
300 | statCounter.icp.replies_queued++; | |
301 | } else | |
302 | { | |
303 | /* don't queue it */ | |
304 | statCounter.icp.replies_dropped++; | |
8e68922c | 305 | } |
62e76326 | 306 | |
17b6e784 | 307 | return x; |
7a2f978b | 308 | } |
309 | ||
310 | int | |
190154cf | 311 | icpCheckUdpHit(StoreEntry * e, HttpRequest * request) |
7a2f978b | 312 | { |
313 | if (e == NULL) | |
62e76326 | 314 | return 0; |
315 | ||
7a2f978b | 316 | if (!storeEntryValidToSend(e)) |
62e76326 | 317 | return 0; |
318 | ||
7a2f978b | 319 | if (Config.onoff.icp_hit_stale) |
62e76326 | 320 | return 1; |
321 | ||
829a9357 | 322 | if (refreshCheckICP(e, request)) |
62e76326 | 323 | return 0; |
324 | ||
7a2f978b | 325 | return 1; |
326 | } | |
7a2f978b | 327 | |
e6ccf245 | 328 | /* ICP_ERR means no opcode selected here */ |
329 | icp_opcode | |
330 | icpGetCommonOpcode() | |
331 | { | |
332 | /* if store is rebuilding, return a UDP_HIT, but not a MISS */ | |
62e76326 | 333 | |
e6ccf245 | 334 | if (store_dirs_rebuilding && opt_reload_hit_only || |
62e76326 | 335 | hit_only_mode_until > squid_curtime) { |
336 | return ICP_MISS_NOFETCH; | |
e6ccf245 | 337 | } |
62e76326 | 338 | |
e6ccf245 | 339 | return ICP_ERR; |
340 | } | |
341 | ||
342 | log_type | |
343 | icpLogFromICPCode(icp_opcode opcode) | |
344 | { | |
345 | if (opcode == ICP_ERR) | |
62e76326 | 346 | return LOG_UDP_INVALID; |
347 | ||
e6ccf245 | 348 | if (opcode == ICP_DENIED) |
62e76326 | 349 | return LOG_UDP_DENIED; |
350 | ||
e6ccf245 | 351 | if (opcode == ICP_HIT) |
62e76326 | 352 | return LOG_UDP_HIT; |
353 | ||
e6ccf245 | 354 | if (opcode == ICP_MISS) |
62e76326 | 355 | return LOG_UDP_MISS; |
356 | ||
e6ccf245 | 357 | if (opcode == ICP_MISS_NOFETCH) |
62e76326 | 358 | return LOG_UDP_MISS_NOFETCH; |
359 | ||
e6ccf245 | 360 | fatal("expected ICP opcode\n"); |
62e76326 | 361 | |
e6ccf245 | 362 | return LOG_UDP_INVALID; |
363 | } | |
364 | ||
365 | void | |
62e76326 | 366 | |
e6ccf245 | 367 | icpCreateAndSend(icp_opcode opcode, int flags, char const *url, int reqnum, int pad, int fd, const struct sockaddr_in *from) |
368 | { | |
369 | icp_common_t *reply = _icp_common_t::createMessage(opcode, flags, url, reqnum, pad); | |
370 | icpUdpSend(fd, from, reply, icpLogFromICPCode(opcode), 0); | |
371 | } | |
372 | ||
373 | void | |
62e76326 | 374 | |
e6ccf245 | 375 | icpDenyAccess(struct sockaddr_in *from, char *url, int reqnum, int fd) |
376 | { | |
377 | debug(12, 2) ("icpDenyAccess: Access Denied for %s by %s.\n", | |
62e76326 | 378 | inet_ntoa(from->sin_addr), AclMatchedName); |
379 | ||
380 | if (clientdbCutoffDenied(from->sin_addr)) | |
381 | { | |
382 | /* | |
383 | * count this DENIED query in the clientdb, even though | |
384 | * we're not sending an ICP reply... | |
385 | */ | |
386 | clientdbUpdate(from->sin_addr, LOG_UDP_DENIED, PROTO_ICP, 0); | |
387 | } else | |
388 | { | |
389 | icpCreateAndSend(ICP_DENIED, 0, url, reqnum, 0, fd, from); | |
e6ccf245 | 390 | } |
391 | } | |
392 | ||
393 | int | |
62e76326 | 394 | |
190154cf | 395 | icpAccessAllowed(struct sockaddr_in *from, HttpRequest * icp_request) |
7a2f978b | 396 | { |
4fb35c3c | 397 | ACLChecklist checklist; |
e6ccf245 | 398 | checklist.src_addr = from->sin_addr; |
399 | checklist.my_addr = no_addr; | |
8000a965 | 400 | checklist.request = requestLink(icp_request); |
506768d9 | 401 | checklist.accessList = cbdataReference(Config.accessList.icp); |
108d65b2 | 402 | /* cbdataReferenceDone() happens in either fastCheck() or ~ACLCheckList */ |
b448c119 | 403 | int result = checklist.fastCheck(); |
b448c119 | 404 | return result; |
e6ccf245 | 405 | } |
406 | ||
407 | char const * | |
408 | icpGetUrlToSend(char *url) | |
409 | { | |
410 | if (strpbrk(url, w_space)) | |
62e76326 | 411 | return rfc1738_escape(url); |
e6ccf245 | 412 | else |
62e76326 | 413 | return url; |
e6ccf245 | 414 | } |
415 | ||
190154cf | 416 | HttpRequest * |
62e76326 | 417 | |
e6ccf245 | 418 | icpGetRequest(char *url, int reqnum, int fd, struct sockaddr_in * from) |
419 | { | |
62e76326 | 420 | if (strpbrk(url, w_space)) |
421 | { | |
422 | url = rfc1738_escape(url); | |
423 | icpCreateAndSend(ICP_ERR, 0, rfc1738_escape(url), reqnum, 0, fd, from); | |
424 | return NULL; | |
e6ccf245 | 425 | } |
62e76326 | 426 | |
190154cf | 427 | HttpRequest *result; |
62e76326 | 428 | |
e6ccf245 | 429 | if ((result = urlParse(METHOD_GET, url)) == NULL) |
62e76326 | 430 | icpCreateAndSend(ICP_ERR, 0, url, reqnum, 0, fd, from); |
431 | ||
e6ccf245 | 432 | return result; |
433 | ||
434 | } | |
435 | ||
436 | static void | |
62e76326 | 437 | |
e6ccf245 | 438 | doV2Query(int fd, struct sockaddr_in from, char *buf, icp_common_t header) |
439 | { | |
440 | int rtt = 0; | |
7a2f978b | 441 | int src_rtt = 0; |
a9245686 | 442 | u_int32_t flags = 0; |
e6ccf245 | 443 | /* We have a valid packet */ |
444 | char *url = buf + sizeof(icp_common_t) + sizeof(u_int32_t); | |
190154cf | 445 | HttpRequest *icp_request = icpGetRequest(url, header.reqnum, fd, &from); |
62e76326 | 446 | |
e6ccf245 | 447 | if (!icp_request) |
62e76326 | 448 | return; |
449 | ||
319bf5a7 | 450 | requestLink(icp_request); |
451 | ||
62e76326 | 452 | if (!icpAccessAllowed(&from, icp_request)) |
453 | { | |
454 | icpDenyAccess(&from, url, header.reqnum, fd); | |
319bf5a7 | 455 | requestUnlink(icp_request); |
62e76326 | 456 | return; |
e6ccf245 | 457 | } |
62e76326 | 458 | |
459 | if (header.flags & ICP_FLAG_SRC_RTT) | |
460 | { | |
461 | rtt = netdbHostRtt(icp_request->host); | |
462 | int hops = netdbHostHops(icp_request->host); | |
463 | src_rtt = ((hops & 0xFFFF) << 16) | (rtt & 0xFFFF); | |
464 | ||
465 | if (rtt) | |
466 | flags |= ICP_FLAG_SRC_RTT; | |
e6ccf245 | 467 | } |
62e76326 | 468 | |
e6ccf245 | 469 | /* The peer is allowed to use this cache */ |
470 | ICP2State *state = new ICP2State (header); | |
62e76326 | 471 | |
e6ccf245 | 472 | state->fd = fd; |
62e76326 | 473 | |
e6ccf245 | 474 | state->from = from; |
62e76326 | 475 | |
e6ccf245 | 476 | state->url = xstrdup (url); |
62e76326 | 477 | |
e6ccf245 | 478 | state->flags = flags; |
62e76326 | 479 | |
e6ccf245 | 480 | state->rtt = rtt; |
62e76326 | 481 | |
e6ccf245 | 482 | state->src_rtt = src_rtt; |
62e76326 | 483 | |
3b13a8fd | 484 | StoreEntry::getPublic (state, url, METHOD_GET); |
319bf5a7 | 485 | |
486 | requestUnlink(icp_request); | |
e6ccf245 | 487 | } |
488 | ||
489 | void | |
62e76326 | 490 | |
e6ccf245 | 491 | _icp_common_t::handleReply(char *buf, struct sockaddr_in *from) |
492 | { | |
62e76326 | 493 | if (neighbors_do_private_keys && reqnum == 0) |
494 | { | |
495 | debug(12, 0) ("icpHandleIcpV2: Neighbor %s returned reqnum = 0\n", | |
496 | inet_ntoa(from->sin_addr)); | |
497 | debug(12, 0) ("icpHandleIcpV2: Disabling use of private keys\n"); | |
498 | neighbors_do_private_keys = 0; | |
e6ccf245 | 499 | } |
62e76326 | 500 | |
e6ccf245 | 501 | char *url = buf + sizeof(icp_common_t); |
502 | debug(12, 3) ("icpHandleIcpV2: %s from %s for '%s'\n", | |
62e76326 | 503 | icp_opcode_str[opcode], |
504 | inet_ntoa(from->sin_addr), | |
505 | url); | |
e6ccf245 | 506 | const cache_key *key = icpGetCacheKey(url, (int) reqnum); |
507 | /* call neighborsUdpAck even if ping_status != PING_WAITING */ | |
508 | neighborsUdpAck(key, this, from); | |
509 | } | |
510 | ||
511 | static void | |
62e76326 | 512 | |
e6ccf245 | 513 | icpHandleIcpV2(int fd, struct sockaddr_in from, char *buf, int len) |
514 | { | |
62e76326 | 515 | if (len <= 0) |
516 | { | |
517 | debug(12, 3) ("icpHandleIcpV2: ICP message is too small\n"); | |
518 | return; | |
e6ccf245 | 519 | } |
62e76326 | 520 | |
e6ccf245 | 521 | icp_common_t header(buf, len); |
7b83b3d9 | 522 | /* |
523 | * Length field should match the number of bytes read | |
524 | */ | |
62e76326 | 525 | |
526 | if (len != header.length) | |
527 | { | |
528 | debug(12, 3) ("icpHandleIcpV2: ICP message is too small\n"); | |
529 | return; | |
7b83b3d9 | 530 | } |
62e76326 | 531 | |
532 | switch (header.opcode) | |
533 | { | |
534 | ||
27cd7235 | 535 | case ICP_QUERY: |
62e76326 | 536 | /* We have a valid packet */ |
537 | doV2Query(fd, from, buf, header); | |
538 | break; | |
7a2f978b | 539 | |
27cd7235 | 540 | case ICP_HIT: |
db1cd23c | 541 | #if ALLOW_SOURCE_PING |
62e76326 | 542 | |
27cd7235 | 543 | case ICP_SECHO: |
db1cd23c | 544 | #endif |
62e76326 | 545 | |
27cd7235 | 546 | case ICP_DECHO: |
62e76326 | 547 | |
27cd7235 | 548 | case ICP_MISS: |
62e76326 | 549 | |
27cd7235 | 550 | case ICP_DENIED: |
62e76326 | 551 | |
27cd7235 | 552 | case ICP_MISS_NOFETCH: |
62e76326 | 553 | header.handleReply(buf, &from); |
554 | break; | |
7a2f978b | 555 | |
27cd7235 | 556 | case ICP_INVALID: |
62e76326 | 557 | |
27cd7235 | 558 | case ICP_ERR: |
62e76326 | 559 | break; |
7a2f978b | 560 | |
561 | default: | |
62e76326 | 562 | debug(12, 0) ("icpHandleIcpV2: UNKNOWN OPCODE: %d from %s\n", |
563 | header.opcode, inet_ntoa(from.sin_addr)); | |
564 | break; | |
7a2f978b | 565 | } |
7a2f978b | 566 | } |
567 | ||
568 | #ifdef ICP_PKT_DUMP | |
569 | static void | |
570 | icpPktDump(icp_common_t * pkt) | |
571 | { | |
62e76326 | 572 | |
ddfcbc22 | 573 | struct IN_ADDR a; |
7a2f978b | 574 | |
575 | debug(12, 9) ("opcode: %3d %s\n", | |
62e76326 | 576 | (int) pkt->opcode, |
577 | icp_opcode_str[pkt->opcode]); | |
7a2f978b | 578 | debug(12, 9) ("version: %-8d\n", (int) pkt->version); |
579 | debug(12, 9) ("length: %-8d\n", (int) ntohs(pkt->length)); | |
580 | debug(12, 9) ("reqnum: %-8d\n", ntohl(pkt->reqnum)); | |
581 | debug(12, 9) ("flags: %-8x\n", ntohl(pkt->flags)); | |
67129385 | 582 | a.s_addr = pkt->shostid; |
7a2f978b | 583 | debug(12, 9) ("shostid: %s\n", inet_ntoa(a)); |
584 | debug(12, 9) ("payload: %s\n", (char *) pkt + sizeof(icp_common_t)); | |
585 | } | |
62e76326 | 586 | |
7a2f978b | 587 | #endif |
588 | ||
589 | void | |
ba4f8e5a | 590 | icpHandleUdp(int sock, void *data) |
7a2f978b | 591 | { |
d193a436 | 592 | int *N = &incoming_sockets_accepted; |
62e76326 | 593 | |
7a2f978b | 594 | struct sockaddr_in from; |
6637e3a5 | 595 | socklen_t from_len; |
7a2f978b | 596 | LOCAL_ARRAY(char, buf, SQUID_UDP_SO_RCVBUF); |
e6ccf245 | 597 | size_t len; |
7a2f978b | 598 | int icp_version; |
309ad3b6 | 599 | int max = INCOMING_ICP_MAX; |
7a2f978b | 600 | commSetSelect(sock, COMM_SELECT_READ, icpHandleUdp, NULL, 0); |
62e76326 | 601 | |
5b0aaa58 | 602 | while (max--) { |
62e76326 | 603 | from_len = sizeof(from); |
604 | memset(&from, '\0', from_len); | |
605 | len = comm_udp_recvfrom(sock, | |
606 | buf, | |
607 | SQUID_UDP_SO_RCVBUF - 1, | |
608 | 0, | |
609 | ||
610 | (struct sockaddr *) &from, | |
611 | &from_len); | |
612 | ||
613 | if (len == 0) | |
614 | break; | |
615 | ||
616 | if (len < 0) { | |
617 | if (ignoreErrno(errno)) | |
618 | break; | |
619 | ||
7a2f978b | 620 | #ifdef _SQUID_LINUX_ |
62e76326 | 621 | /* Some Linux systems seem to set the FD for reading and then |
622 | * return ECONNREFUSED when sendto() fails and generates an ICMP | |
623 | * port unreachable message. */ | |
624 | /* or maybe an EHOSTUNREACH "No route to host" message */ | |
625 | if (errno != ECONNREFUSED && errno != EHOSTUNREACH) | |
7a2f978b | 626 | #endif |
62e76326 | 627 | |
628 | debug(50, 1) ("icpHandleUdp: FD %d recvfrom: %s\n", | |
629 | sock, xstrerror()); | |
630 | ||
631 | break; | |
632 | } | |
633 | ||
634 | (*N)++; | |
635 | icpCount(buf, RECV, (size_t) len, 0); | |
636 | buf[len] = '\0'; | |
637 | debug(12, 4) ("icpHandleUdp: FD %d: received %lu bytes from %s.\n", | |
638 | sock, | |
639 | (unsigned long int)len, | |
640 | inet_ntoa(from.sin_addr)); | |
7a2f978b | 641 | #ifdef ICP_PACKET_DUMP |
62e76326 | 642 | |
643 | icpPktDump(buf); | |
7a2f978b | 644 | #endif |
62e76326 | 645 | |
646 | if (len < sizeof(icp_common_t)) { | |
647 | debug(12, 4) ("icpHandleUdp: Ignoring too-small UDP packet\n"); | |
648 | break; | |
649 | } | |
650 | ||
651 | icp_version = (int) buf[1]; /* cheat! */ | |
652 | ||
653 | if (icp_version == ICP_VERSION_2) | |
654 | icpHandleIcpV2(sock, from, buf, len); | |
655 | else if (icp_version == ICP_VERSION_3) | |
656 | icpHandleIcpV3(sock, from, buf, len); | |
657 | else | |
658 | debug(12, 1) ("WARNING: Unused ICP version %d received from %s:%d\n", | |
659 | icp_version, | |
660 | inet_ntoa(from.sin_addr), | |
661 | ntohs(from.sin_port)); | |
7a2f978b | 662 | } |
7a2f978b | 663 | } |
15df8349 | 664 | |
665 | void | |
666 | icpConnectionsOpen(void) | |
667 | { | |
a9245686 | 668 | u_int16_t port; |
62e76326 | 669 | |
ddfcbc22 | 670 | struct IN_ADDR addr; |
62e76326 | 671 | |
15df8349 | 672 | struct sockaddr_in xaddr; |
673 | int x; | |
6637e3a5 | 674 | socklen_t len; |
15df8349 | 675 | wordlist *s; |
62e76326 | 676 | |
15df8349 | 677 | if ((port = Config.Port.icp) <= 0) |
62e76326 | 678 | return; |
679 | ||
15df8349 | 680 | enter_suid(); |
62e76326 | 681 | |
15df8349 | 682 | theInIcpConnection = comm_open(SOCK_DGRAM, |
bdb741f4 | 683 | IPPROTO_UDP, |
62e76326 | 684 | Config.Addrs.udp_incoming, |
685 | port, | |
686 | COMM_NONBLOCKING, | |
687 | "ICP Socket"); | |
688 | ||
15df8349 | 689 | leave_suid(); |
62e76326 | 690 | |
15df8349 | 691 | if (theInIcpConnection < 0) |
62e76326 | 692 | fatal("Cannot open ICP Port"); |
693 | ||
15df8349 | 694 | commSetSelect(theInIcpConnection, |
62e76326 | 695 | COMM_SELECT_READ, |
696 | icpHandleUdp, | |
697 | NULL, | |
698 | 0); | |
699 | ||
15df8349 | 700 | for (s = Config.mcast_group_list; s; s = s->next) |
62e76326 | 701 | ipcache_nbgethostbyname(s->key, mcastJoinGroups, NULL); |
702 | ||
7e3ce7b9 | 703 | debug(12, 1) ("Accepting ICP messages at %s, port %d, FD %d.\n", |
62e76326 | 704 | inet_ntoa(Config.Addrs.udp_incoming), |
705 | (int) port, theInIcpConnection); | |
706 | ||
15df8349 | 707 | if ((addr = Config.Addrs.udp_outgoing).s_addr != no_addr.s_addr) { |
62e76326 | 708 | enter_suid(); |
709 | theOutIcpConnection = comm_open(SOCK_DGRAM, | |
bdb741f4 | 710 | IPPROTO_UDP, |
62e76326 | 711 | addr, |
712 | port, | |
713 | COMM_NONBLOCKING, | |
714 | "ICP Port"); | |
715 | leave_suid(); | |
716 | ||
717 | if (theOutIcpConnection < 0) | |
718 | fatal("Cannot open Outgoing ICP Port"); | |
719 | ||
720 | commSetSelect(theOutIcpConnection, | |
721 | COMM_SELECT_READ, | |
722 | icpHandleUdp, | |
723 | NULL, | |
724 | 0); | |
725 | ||
726 | debug(12, 1) ("Outgoing ICP messages on port %d, FD %d.\n", | |
727 | (int) port, theOutIcpConnection); | |
728 | ||
729 | fd_note(theOutIcpConnection, "Outgoing ICP socket"); | |
730 | ||
731 | fd_note(theInIcpConnection, "Incoming ICP socket"); | |
15df8349 | 732 | } else { |
62e76326 | 733 | theOutIcpConnection = theInIcpConnection; |
15df8349 | 734 | } |
62e76326 | 735 | |
ddfcbc22 | 736 | memset(&theOutICPAddr, '\0', sizeof(struct IN_ADDR)); |
62e76326 | 737 | |
15df8349 | 738 | len = sizeof(struct sockaddr_in); |
739 | memset(&xaddr, '\0', len); | |
740 | x = getsockname(theOutIcpConnection, | |
62e76326 | 741 | |
742 | (struct sockaddr *) &xaddr, &len); | |
743 | ||
15df8349 | 744 | if (x < 0) |
62e76326 | 745 | debug(50, 1) ("theOutIcpConnection FD %d: getsockname: %s\n", |
746 | theOutIcpConnection, xstrerror()); | |
15df8349 | 747 | else |
62e76326 | 748 | theOutICPAddr = xaddr.sin_addr; |
15df8349 | 749 | } |
c0fbae16 | 750 | |
17e6c0a1 | 751 | /* |
752 | * icpConnectionShutdown only closes the 'in' socket if it is | |
753 | * different than the 'out' socket. | |
754 | */ | |
c0fbae16 | 755 | void |
17e6c0a1 | 756 | icpConnectionShutdown(void) |
c0fbae16 | 757 | { |
758 | if (theInIcpConnection < 0) | |
62e76326 | 759 | return; |
760 | ||
17e6c0a1 | 761 | if (theInIcpConnection != theOutIcpConnection) { |
62e76326 | 762 | debug(12, 1) ("FD %d Closing ICP connection\n", theInIcpConnection); |
763 | comm_close(theInIcpConnection); | |
17e6c0a1 | 764 | } |
62e76326 | 765 | |
c0fbae16 | 766 | /* |
767 | * Here we set 'theInIcpConnection' to -1 even though the ICP 'in' | |
768 | * and 'out' sockets might be just one FD. This prevents this | |
769 | * function from executing repeatedly. When we are really ready to | |
770 | * exit or restart, main will comm_close the 'out' descriptor. | |
771 | */ | |
772 | theInIcpConnection = -1; | |
62e76326 | 773 | |
c0fbae16 | 774 | /* |
775 | * Normally we only write to the outgoing ICP socket, but | |
776 | * we also have a read handler there to catch messages sent | |
777 | * to that specific interface. During shutdown, we must | |
778 | * disable reading on the outgoing socket. | |
779 | */ | |
780 | assert(theOutIcpConnection > -1); | |
62e76326 | 781 | |
c0fbae16 | 782 | commSetSelect(theOutIcpConnection, COMM_SELECT_READ, NULL, NULL, 0); |
783 | } | |
17e6c0a1 | 784 | |
785 | void | |
786 | icpConnectionClose(void) | |
787 | { | |
788 | icpConnectionShutdown(); | |
62e76326 | 789 | |
17e6c0a1 | 790 | if (theOutIcpConnection > -1) { |
62e76326 | 791 | debug(12, 1) ("FD %d Closing ICP connection\n", theOutIcpConnection); |
792 | comm_close(theOutIcpConnection); | |
793 | theOutIcpConnection = -1; | |
17e6c0a1 | 794 | } |
795 | } | |
071a3ae7 | 796 | |
797 | static void | |
798 | icpCount(void *buf, int which, size_t len, int delay) | |
799 | { | |
e6ccf245 | 800 | icp_common_t *icp = (icp_common_t *) buf; |
62e76326 | 801 | |
071a3ae7 | 802 | if (len < sizeof(*icp)) |
62e76326 | 803 | return; |
804 | ||
071a3ae7 | 805 | if (SENT == which) { |
62e76326 | 806 | statCounter.icp.pkts_sent++; |
807 | kb_incr(&statCounter.icp.kbytes_sent, len); | |
808 | ||
809 | if (ICP_QUERY == icp->opcode) { | |
810 | statCounter.icp.queries_sent++; | |
811 | kb_incr(&statCounter.icp.q_kbytes_sent, len); | |
812 | } else { | |
813 | statCounter.icp.replies_sent++; | |
814 | kb_incr(&statCounter.icp.r_kbytes_sent, len); | |
815 | /* this is the sent-reply service time */ | |
816 | statHistCount(&statCounter.icp.reply_svc_time, delay); | |
817 | } | |
818 | ||
819 | if (ICP_HIT == icp->opcode) | |
820 | statCounter.icp.hits_sent++; | |
071a3ae7 | 821 | } else if (RECV == which) { |
62e76326 | 822 | statCounter.icp.pkts_recv++; |
823 | kb_incr(&statCounter.icp.kbytes_recv, len); | |
824 | ||
825 | if (ICP_QUERY == icp->opcode) { | |
826 | statCounter.icp.queries_recv++; | |
827 | kb_incr(&statCounter.icp.q_kbytes_recv, len); | |
828 | } else { | |
829 | statCounter.icp.replies_recv++; | |
830 | kb_incr(&statCounter.icp.r_kbytes_recv, len); | |
831 | /* statCounter.icp.query_svc_time set in clientUpdateCounters */ | |
832 | } | |
833 | ||
834 | if (ICP_HIT == icp->opcode) | |
835 | statCounter.icp.hits_recv++; | |
071a3ae7 | 836 | } |
837 | } | |
007b8be4 | 838 | |
839 | #define N_QUERIED_KEYS 8192 | |
840 | #define N_QUERIED_KEYS_MASK 8191 | |
841 | static cache_key queried_keys[N_QUERIED_KEYS][MD5_DIGEST_CHARS]; | |
842 | ||
843 | int | |
5942e8d4 | 844 | icpSetCacheKey(const cache_key * key) |
007b8be4 | 845 | { |
846 | static int reqnum = 0; | |
62e76326 | 847 | |
007b8be4 | 848 | if (++reqnum < 0) |
62e76326 | 849 | reqnum = 1; |
850 | ||
007b8be4 | 851 | storeKeyCopy(queried_keys[reqnum & N_QUERIED_KEYS_MASK], key); |
62e76326 | 852 | |
007b8be4 | 853 | return reqnum; |
854 | } | |
855 | ||
856 | const cache_key * | |
857 | icpGetCacheKey(const char *url, int reqnum) | |
858 | { | |
859 | if (neighbors_do_private_keys && reqnum) | |
62e76326 | 860 | return queried_keys[reqnum & N_QUERIED_KEYS_MASK]; |
861 | ||
007b8be4 | 862 | return storeKeyPublic(url, METHOD_GET); |
863 | } |