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30a4f2a8 | 1 | /* |
30a4f2a8 | 2 | * DEBUG: section 5 Socket Functions |
3 | * AUTHOR: Harvest Derived | |
4 | * | |
2b6662ba | 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 6 | * ---------------------------------------------------------- |
30a4f2a8 | 7 | * |
2b6662ba | 8 | * Squid is the result of efforts by numerous individuals from |
9 | * the Internet community; see the CONTRIBUTORS file for full | |
10 | * details. Many organizations have provided support for Squid's | |
11 | * development; see the SPONSORS file for full details. Squid is | |
12 | * Copyrighted (C) 2001 by the Regents of the University of | |
13 | * California; see the COPYRIGHT file for full details. Squid | |
14 | * incorporates software developed and/or copyrighted by other | |
15 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 16 | * |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or | |
20 | * (at your option) any later version. | |
9e008dda | 21 | * |
30a4f2a8 | 22 | * This program is distributed in the hope that it will be useful, |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
9e008dda | 26 | * |
30a4f2a8 | 27 | * You should have received a copy of the GNU General Public License |
28 | * along with this program; if not, write to the Free Software | |
cbdec147 | 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 30 | * |
2d8c0b1a | 31 | * |
32 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
30a4f2a8 | 33 | */ |
090089c4 | 34 | |
44a47c6e | 35 | #include "squid.h" |
c4b7a5a9 | 36 | #include "StoreIOBuffer.h" |
37 | #include "comm.h" | |
a553a5a3 | 38 | #include "event.h" |
528b2c61 | 39 | #include "fde.h" |
04f55905 AJ |
40 | #include "comm/AcceptLimiter.h" |
41 | #include "comm/comm_internal.h" | |
42 | #include "comm/ListenStateData.h" | |
56410c89 | 43 | #include "CommIO.h" |
a553a5a3 | 44 | #include "CommRead.h" |
ee0989f2 | 45 | #include "ConnectionDetail.h" |
0eb49b6d | 46 | #include "MemBuf.h" |
781ce8ff | 47 | #include "pconn.h" |
985c86bc | 48 | #include "SquidTime.h" |
b0469965 | 49 | #include "CommCalls.h" |
74257126 | 50 | #include "DescriptorSet.h" |
9b5c4a9a | 51 | #include "icmp/net_db.h" |
96d89ea0 HN |
52 | #include "ip/Address.h" |
53 | #include "ip/Intercept.h" | |
090089c4 | 54 | |
b671cc68 | 55 | #if defined(_SQUID_CYGWIN_) |
56 | #include <sys/ioctl.h> | |
57 | #endif | |
30a4f2a8 | 58 | #ifdef HAVE_NETINET_TCP_H |
59 | #include <netinet/tcp.h> | |
60 | #endif | |
090089c4 | 61 | |
2b663917 | 62 | /* |
63 | * New C-like simple comm code. This stuff is a mess and doesn't really buy us anything. | |
64 | */ | |
65 | ||
66 | typedef enum { | |
9e008dda AJ |
67 | IOCB_NONE, |
68 | IOCB_READ, | |
69 | IOCB_WRITE | |
2b663917 | 70 | } iocb_type; |
71 | ||
82ec8dfc AR |
72 | static void commStopHalfClosedMonitor(int fd); |
73 | static IOCB commHalfClosedReader; | |
74 | ||
75 | ||
b0469965 | 76 | struct comm_io_callback_t { |
9e008dda AJ |
77 | iocb_type type; |
78 | int fd; | |
79 | AsyncCall::Pointer callback; | |
80 | char *buf; | |
81 | FREE *freefunc; | |
82 | int size; | |
83 | int offset; | |
84 | comm_err_t errcode; | |
85 | int xerrno; | |
86 | ||
87 | bool active() const { return callback != NULL; } | |
2b663917 | 88 | }; |
2b663917 | 89 | |
90 | struct _comm_fd { | |
9e008dda AJ |
91 | int fd; |
92 | comm_io_callback_t readcb; | |
93 | comm_io_callback_t writecb; | |
2b663917 | 94 | }; |
95 | typedef struct _comm_fd comm_fd_t; | |
96 | comm_fd_t *commfd_table; | |
97 | ||
b0469965 | 98 | // TODO: make this a comm_io_callback_t method? |
2b663917 | 99 | bool |
100 | commio_has_callback(int fd, iocb_type type, comm_io_callback_t *ccb) | |
101 | { | |
9e008dda AJ |
102 | assert(ccb->fd == fd); |
103 | assert(ccb->type == type); | |
104 | return ccb->active(); | |
2b663917 | 105 | } |
106 | ||
107 | /* | |
b0469965 | 108 | * Configure comm_io_callback_t for I/O |
2b663917 | 109 | * |
110 | * @param fd filedescriptor | |
111 | * @param ccb comm io callback | |
112 | * @param cb callback | |
113 | * @param cbdata callback data (must be cbdata'ed) | |
114 | * @param buf buffer, if applicable | |
115 | * @param freefunc freefunc, if applicable | |
116 | * @param size buffer size | |
117 | */ | |
b0469965 | 118 | static void |
119 | commio_set_callback(int fd, iocb_type type, comm_io_callback_t *ccb, | |
9e008dda | 120 | AsyncCall::Pointer &cb, char *buf, FREE *freefunc, int size) |
2b663917 | 121 | { |
9e008dda AJ |
122 | assert(!ccb->active()); |
123 | assert(ccb->type == type); | |
124 | assert(cb != NULL); | |
125 | ccb->fd = fd; | |
126 | ccb->callback = cb; | |
127 | ccb->buf = buf; | |
128 | ccb->freefunc = freefunc; | |
129 | ccb->size = size; | |
130 | ccb->offset = 0; | |
2b663917 | 131 | } |
132 | ||
133 | ||
b0469965 | 134 | // Schedule the callback call and clear the callback |
135 | static void | |
136 | commio_finish_callback(int fd, comm_io_callback_t *ccb, comm_err_t code, int xerrno) | |
2b663917 | 137 | { |
b0469965 | 138 | debugs(5, 3, "commio_finish_callback: called for FD " << fd << " (" << |
9e008dda AJ |
139 | code << ", " << xerrno << ")"); |
140 | assert(ccb->active()); | |
141 | assert(ccb->fd == fd); | |
142 | ccb->errcode = code; | |
143 | ccb->xerrno = xerrno; | |
144 | ||
145 | comm_io_callback_t cb = *ccb; | |
146 | ||
147 | /* We've got a copy; blow away the real one */ | |
148 | /* XXX duplicate code from commio_cancel_callback! */ | |
149 | ccb->xerrno = 0; | |
150 | ccb->callback = NULL; // cb has it | |
151 | ||
152 | /* free data */ | |
153 | if (cb.freefunc) { | |
154 | cb.freefunc(cb.buf); | |
155 | cb.buf = NULL; | |
156 | } | |
157 | ||
158 | if (cb.callback != NULL) { | |
b0469965 | 159 | typedef CommIoCbParams Params; |
160 | Params ¶ms = GetCommParams<Params>(cb.callback); | |
161 | params.fd = cb.fd; | |
162 | params.buf = cb.buf; | |
163 | params.size = cb.offset; | |
164 | params.flag = cb.errcode; | |
165 | params.xerrno = cb.xerrno; | |
166 | ScheduleCallHere(cb.callback); | |
9e008dda | 167 | } |
2b663917 | 168 | } |
169 | ||
170 | ||
171 | /* | |
172 | * Cancel the given callback | |
173 | * | |
174 | * Remember that the data is cbdataRef'ed. | |
175 | */ | |
b0469965 | 176 | // TODO: make this a comm_io_callback_t method |
177 | static void | |
2b663917 | 178 | commio_cancel_callback(int fd, comm_io_callback_t *ccb) |
179 | { | |
b0469965 | 180 | debugs(5, 3, "commio_cancel_callback: called for FD " << fd); |
9e008dda AJ |
181 | assert(ccb->fd == fd); |
182 | assert(ccb->active()); | |
2b663917 | 183 | |
9e008dda AJ |
184 | ccb->xerrno = 0; |
185 | ccb->callback = NULL; | |
2b663917 | 186 | } |
187 | ||
188 | /* | |
189 | * Call the given comm callback; assumes the callback is valid. | |
9e008dda | 190 | * |
2b663917 | 191 | * @param ccb io completion callback |
192 | */ | |
193 | void | |
194 | commio_call_callback(comm_io_callback_t *ccb) | |
195 | { | |
2b663917 | 196 | } |
197 | ||
2d8c0b1a | 198 | class ConnectStateData |
62e76326 | 199 | { |
2d8c0b1a | 200 | |
201 | public: | |
d2d59a68 | 202 | void *operator new (size_t); |
203 | void operator delete (void *); | |
2d8c0b1a | 204 | static void Connect (int fd, void *me); |
205 | void connect(); | |
206 | void callCallback(comm_err_t status, int xerrno); | |
207 | void defaults(); | |
cc192b50 | 208 | |
209 | // defaults given by client | |
f88211e8 | 210 | char *host; |
cc192b50 | 211 | u_short default_port; |
b7ac5457 | 212 | Ip::Address default_addr; |
cc192b50 | 213 | // NP: CANNOT store the default addr:port together as it gets set/reset differently. |
62e76326 | 214 | |
3ff65596 | 215 | DnsLookupDetails dns; ///< host lookup details |
b7ac5457 | 216 | Ip::Address S; |
b0469965 | 217 | AsyncCall::Pointer callback; |
62e76326 | 218 | |
03a1ee42 | 219 | int fd; |
22c653cd | 220 | int tries; |
221 | int addrcount; | |
222 | int connstart; | |
d2d59a68 | 223 | |
224 | private: | |
0b77ecd8 | 225 | int commResetFD(); |
226 | int commRetryConnect(); | |
d2d59a68 | 227 | CBDATA_CLASS(ConnectStateData); |
2d8c0b1a | 228 | }; |
f88211e8 | 229 | |
090089c4 | 230 | /* STATIC */ |
62e76326 | 231 | |
74257126 AR |
232 | static DescriptorSet *TheHalfClosed = NULL; /// the set of half-closed FDs |
233 | static bool WillCheckHalfClosed = false; /// true if check is scheduled | |
234 | static EVH commHalfClosedCheck; | |
235 | static void commPlanHalfClosedCheck(); | |
236 | ||
cc192b50 | 237 | static comm_err_t commBind(int s, struct addrinfo &); |
f5b8bbc4 | 238 | static void commSetReuseAddr(int); |
239 | static void commSetNoLinger(int); | |
30a4f2a8 | 240 | #ifdef TCP_NODELAY |
f5b8bbc4 | 241 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 242 | #endif |
f5b8bbc4 | 243 | static void commSetTcpRcvbuf(int, int); |
f88211e8 | 244 | static PF commConnectFree; |
03a1ee42 | 245 | static PF commHandleWrite; |
edeb28fd | 246 | static IPH commConnectDnsHandle; |
723123a9 | 247 | |
c4b7a5a9 | 248 | typedef enum { |
62e76326 | 249 | COMM_CB_READ = 1, |
e4ae841b | 250 | COMM_CB_DERIVED |
c4b7a5a9 | 251 | } comm_callback_t; |
252 | ||
b001e822 | 253 | static MemAllocator *conn_close_pool = NULL; |
c4b7a5a9 | 254 | fd_debug_t *fdd_table = NULL; |
62e76326 | 255 | |
04f55905 | 256 | bool |
b0469965 | 257 | isOpen(const int fd) |
b300c36d | 258 | { |
9e008dda | 259 | return fd_table[fd].flags.open != 0; |
b300c36d | 260 | } |
261 | ||
e1a88700 | 262 | /** |
c4b7a5a9 | 263 | * Attempt a read |
264 | * | |
265 | * If the read attempt succeeds or fails, call the callback. | |
266 | * Else, wait for another IO notification. | |
267 | */ | |
2d8c0b1a | 268 | void |
2b663917 | 269 | commHandleRead(int fd, void *data) |
2d8c0b1a | 270 | { |
2b663917 | 271 | comm_io_callback_t *ccb = (comm_io_callback_t *) data; |
9e008dda | 272 | |
2b663917 | 273 | assert(data == COMMIO_FD_READCB(fd)); |
274 | assert(commio_has_callback(fd, IOCB_READ, ccb)); | |
62e76326 | 275 | /* Attempt a read */ |
276 | statCounter.syscalls.sock.reads++; | |
277 | errno = 0; | |
2d8c0b1a | 278 | int retval; |
2b663917 | 279 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 280 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 281 | |
282 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 283 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
9e008dda AJ |
284 | ccb->offset = 0; |
285 | commio_finish_callback(fd, ccb, COMM_ERROR, errno); | |
62e76326 | 286 | return; |
287 | }; | |
288 | ||
289 | /* See if we read anything */ | |
290 | /* Note - read 0 == socket EOF, which is a valid read */ | |
291 | if (retval >= 0) { | |
292 | fd_bytes(fd, retval, FD_READ); | |
9e008dda AJ |
293 | ccb->offset = retval; |
294 | commio_finish_callback(fd, ccb, COMM_OK, errno); | |
62e76326 | 295 | return; |
296 | } | |
c4b7a5a9 | 297 | |
62e76326 | 298 | /* Nope, register for some more IO */ |
2b663917 | 299 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 300 | } |
301 | ||
e1a88700 | 302 | /** |
c4b7a5a9 | 303 | * Queue a read. handler/handler_data are called when the read |
304 | * completes, on error, or on file descriptor close. | |
305 | */ | |
306 | void | |
307 | comm_read(int fd, char *buf, int size, IOCB *handler, void *handler_data) | |
b0469965 | 308 | { |
309 | AsyncCall::Pointer call = commCbCall(5,4, "SomeCommReadHandler", | |
9e008dda | 310 | CommIoCbPtrFun(handler, handler_data)); |
b0469965 | 311 | comm_read(fd, buf, size, call); |
312 | } | |
313 | ||
314 | void | |
315 | comm_read(int fd, char *buf, int size, AsyncCall::Pointer &callback) | |
c4b7a5a9 | 316 | { |
82ec8dfc | 317 | debugs(5, 5, "comm_read, queueing read for FD " << fd << "; asynCall " << callback); |
c4b7a5a9 | 318 | |
82ec8dfc AR |
319 | /* Make sure we are open and not closing */ |
320 | assert(isOpen(fd)); | |
321 | assert(!fd_table[fd].closing()); | |
322 | comm_io_callback_t *ccb = COMMIO_FD_READCB(fd); | |
323 | ||
324 | // Make sure we are either not reading or just passively monitoring. | |
325 | // Active/passive conflicts are OK and simply cancel passive monitoring. | |
326 | if (ccb->active()) { | |
327 | // if the assertion below fails, we have an active comm_read conflict | |
74257126 | 328 | assert(fd_table[fd].halfClosedReader != NULL); |
82ec8dfc AR |
329 | commStopHalfClosedMonitor(fd); |
330 | assert(!ccb->active()); | |
331 | } | |
528b2c61 | 332 | |
2b663917 | 333 | /* Queue the read */ |
82ec8dfc AR |
334 | commio_set_callback(fd, IOCB_READ, ccb, callback, (char *)buf, NULL, size); |
335 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, ccb, 0); | |
c4b7a5a9 | 336 | } |
337 | ||
e1a88700 | 338 | /** |
c4b7a5a9 | 339 | * Empty the read buffers |
340 | * | |
341 | * This is a magical routine that empties the read buffers. | |
342 | * Under some platforms (Linux) if a buffer has data in it before | |
343 | * you call close(), the socket will hang and take quite a while | |
344 | * to timeout. | |
345 | */ | |
346 | static void | |
347 | comm_empty_os_read_buffers(int fd) | |
348 | { | |
a42d5c25 | 349 | #ifdef _SQUID_LINUX_ |
c4b7a5a9 | 350 | /* prevent those nasty RST packets */ |
351 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 352 | |
cc192b50 | 353 | if (fd_table[fd].flags.nonblocking == 1) { |
354 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) {}; | |
355 | } | |
c4b7a5a9 | 356 | #endif |
357 | } | |
358 | ||
359 | ||
e1a88700 | 360 | /** |
2b663917 | 361 | * Return whether the FD has a pending completed callback. |
c4b7a5a9 | 362 | */ |
363 | int | |
364 | comm_has_pending_read_callback(int fd) | |
365 | { | |
b0469965 | 366 | assert(isOpen(fd)); |
367 | // XXX: We do not know whether there is a read callback scheduled. | |
368 | // This is used for pconn management that should probably be more | |
369 | // tightly integrated into comm to minimize the chance that a | |
370 | // closing pconn socket will be used for a new transaction. | |
545d554b | 371 | return false; |
c4b7a5a9 | 372 | } |
373 | ||
b0469965 | 374 | // Does comm check this fd for read readiness? |
375 | // Note that when comm is not monitoring, there can be a pending callback | |
376 | // call, which may resume comm monitoring once fired. | |
528b2c61 | 377 | bool |
b0469965 | 378 | comm_monitors_read(int fd) |
c4b7a5a9 | 379 | { |
b0469965 | 380 | assert(isOpen(fd)); |
381 | // Being active is usually the same as monitoring because we always | |
382 | // start monitoring the FD when we configure comm_io_callback_t for I/O | |
383 | // and we usually configure comm_io_callback_t for I/O when we starting | |
384 | // monitoring a FD for reading. TODO: replace with commio_has_callback | |
385 | return COMMIO_FD_READCB(fd)->active(); | |
c4b7a5a9 | 386 | } |
387 | ||
e1a88700 | 388 | /** |
c4b7a5a9 | 389 | * Cancel a pending read. Assert that we have the right parameters, |
390 | * and that there are no pending read events! | |
2b663917 | 391 | * |
b0469965 | 392 | * XXX: We do not assert that there are no pending read events and |
393 | * with async calls it becomes even more difficult. | |
394 | * The whole interface should be reworked to do callback->cancel() | |
395 | * instead of searching for places where the callback may be stored and | |
396 | * updating the state of those places. | |
397 | * | |
2b663917 | 398 | * AHC Don't call the comm handlers? |
c4b7a5a9 | 399 | */ |
400 | void | |
401 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
402 | { | |
b0469965 | 403 | if (!isOpen(fd)) { |
404 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
405 | return; | |
9e008dda | 406 | } |
b0469965 | 407 | |
408 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
409 | // TODO: is "active" == "monitors FD"? | |
410 | if (!cb->active()) { | |
411 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
412 | return; | |
9e008dda | 413 | } |
b0469965 | 414 | |
415 | typedef CommCbFunPtrCallT<CommIoCbPtrFun> Call; | |
416 | Call *call = dynamic_cast<Call*>(cb->callback.getRaw()); | |
417 | if (!call) { | |
418 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " lacks callback"); | |
419 | return; | |
9e008dda | 420 | } |
b0469965 | 421 | |
82ec8dfc AR |
422 | call->cancel("old comm_read_cancel"); |
423 | ||
b0469965 | 424 | typedef CommIoCbParams Params; |
425 | const Params ¶ms = GetCommParams<Params>(cb->callback); | |
c4b7a5a9 | 426 | |
c4b7a5a9 | 427 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
b0469965 | 428 | assert(call->dialer.handler == callback); |
429 | assert(params.data == data); | |
c4b7a5a9 | 430 | |
431 | /* Delete the callback */ | |
b0469965 | 432 | commio_cancel_callback(fd, cb); |
420f2ac8 | 433 | |
434 | /* And the IO event */ | |
62e76326 | 435 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 436 | } |
437 | ||
c4b7a5a9 | 438 | void |
b0469965 | 439 | comm_read_cancel(int fd, AsyncCall::Pointer &callback) |
c4b7a5a9 | 440 | { |
b0469965 | 441 | callback->cancel("comm_read_cancel"); |
9e008dda | 442 | |
b0469965 | 443 | if (!isOpen(fd)) { |
444 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
445 | return; | |
446 | } | |
447 | ||
448 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
449 | ||
450 | if (!cb->active()) { | |
451 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
452 | return; | |
453 | } | |
454 | ||
455 | AsyncCall::Pointer call = cb->callback; | |
82ec8dfc | 456 | assert(call != NULL); // XXX: should never fail (active() checks for callback==NULL) |
9e008dda | 457 | |
b0469965 | 458 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
459 | assert(call == callback); | |
c4b7a5a9 | 460 | |
b0469965 | 461 | /* Delete the callback */ |
462 | commio_cancel_callback(fd, cb); | |
463 | ||
464 | /* And the IO event */ | |
465 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); | |
c4b7a5a9 | 466 | } |
467 | ||
468 | ||
e1a88700 | 469 | /** |
ce767c23 | 470 | * synchronous wrapper around udp socket functions |
471 | */ | |
ce767c23 | 472 | int |
b7ac5457 | 473 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, Ip::Address &from) |
ce767c23 | 474 | { |
62e76326 | 475 | statCounter.syscalls.sock.recvfroms++; |
cc192b50 | 476 | int x = 0; |
477 | struct addrinfo *AI = NULL; | |
478 | ||
479 | debugs(5,8, "comm_udp_recvfrom: FD " << fd << " from " << from); | |
480 | ||
481 | assert( NULL == AI ); | |
482 | ||
483 | from.InitAddrInfo(AI); | |
484 | ||
485 | x = recvfrom(fd, buf, len, flags, AI->ai_addr, &AI->ai_addrlen); | |
486 | ||
487 | from = *AI; | |
488 | ||
489 | from.FreeAddrInfo(AI); | |
490 | ||
491 | return x; | |
ce767c23 | 492 | } |
493 | ||
365f12a9 | 494 | int |
7d21986b | 495 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 496 | { |
b7ac5457 | 497 | Ip::Address nul; |
cc192b50 | 498 | return comm_udp_recvfrom(fd, buf, len, flags, nul); |
365f12a9 | 499 | } |
500 | ||
f71da12c | 501 | ssize_t |
7d21986b | 502 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 503 | { |
62e76326 | 504 | return send(s, buf, len, flags); |
f71da12c | 505 | } |
ce767c23 | 506 | |
507 | ||
545d554b | 508 | bool |
509 | comm_has_incomplete_write(int fd) | |
510 | { | |
b0469965 | 511 | assert(isOpen(fd)); |
512 | return COMMIO_FD_WRITECB(fd)->active(); | |
d4cb310b | 513 | } |
514 | ||
e1a88700 | 515 | /** |
cf3c0ee3 | 516 | * Queue a write. handler/handler_data are called when the write fully |
517 | * completes, on error, or on file descriptor close. | |
518 | */ | |
9864ee44 | 519 | |
090089c4 | 520 | /* Return the local port associated with fd. */ |
b8d8561b | 521 | u_short |
522 | comm_local_port(int fd) | |
090089c4 | 523 | { |
b7ac5457 | 524 | Ip::Address temp; |
cc192b50 | 525 | struct addrinfo *addr = NULL; |
76f87348 | 526 | fde *F = &fd_table[fd]; |
090089c4 | 527 | |
090089c4 | 528 | /* If the fd is closed already, just return */ |
62e76326 | 529 | |
60c0b5a2 | 530 | if (!F->flags.open) { |
bf8fe701 | 531 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 532 | return 0; |
090089c4 | 533 | } |
62e76326 | 534 | |
cc192b50 | 535 | if (F->local_addr.GetPort()) |
536 | return F->local_addr.GetPort(); | |
62e76326 | 537 | |
6084c0b6 AJ |
538 | #if USE_IPV6 |
539 | if (F->sock_family == AF_INET) | |
540 | temp.SetIPv4(); | |
541 | #endif | |
542 | ||
cc192b50 | 543 | temp.InitAddrInfo(addr); |
62e76326 | 544 | |
cc192b50 | 545 | if (getsockname(fd, addr->ai_addr, &(addr->ai_addrlen)) ) { |
bf8fe701 | 546 | debugs(50, 1, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
cc192b50 | 547 | temp.FreeAddrInfo(addr); |
62e76326 | 548 | return 0; |
090089c4 | 549 | } |
cc192b50 | 550 | temp = *addr; |
551 | ||
552 | temp.FreeAddrInfo(addr); | |
553 | ||
554 | F->local_addr.SetPort(temp.GetPort()); | |
555 | ||
6084c0b6 | 556 | #if 0 // seems to undo comm_open actions on the FD ... |
cc192b50 | 557 | // grab default socket information for this address |
558 | temp.GetAddrInfo(addr); | |
559 | ||
560 | F->sock_family = addr->ai_family; | |
561 | ||
562 | temp.FreeAddrInfo(addr); | |
6084c0b6 | 563 | #endif |
62e76326 | 564 | |
6084c0b6 | 565 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_addr.GetPort() << "(family=" << F->sock_family << ")"); |
cc192b50 | 566 | return F->local_addr.GetPort(); |
090089c4 | 567 | } |
568 | ||
3d7e9d7c | 569 | static comm_err_t |
cc192b50 | 570 | commBind(int s, struct addrinfo &inaddr) |
090089c4 | 571 | { |
83704487 | 572 | statCounter.syscalls.sock.binds++; |
62e76326 | 573 | |
ac760b5e AJ |
574 | if (bind(s, inaddr.ai_addr, inaddr.ai_addrlen) == 0) { |
575 | debugs(50, 6, "commBind: bind socket FD " << s << " to " << fd_table[s].local_addr); | |
62e76326 | 576 | return COMM_OK; |
ac760b5e | 577 | } |
62e76326 | 578 | |
cc192b50 | 579 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << fd_table[s].local_addr << ": " << xstrerror()); |
62e76326 | 580 | |
090089c4 | 581 | return COMM_ERROR; |
582 | } | |
583 | ||
e1a88700 | 584 | /** |
585 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
586 | * is OR of flags specified in comm.h. Defaults TOS | |
587 | */ | |
b8d8561b | 588 | int |
16b204c4 | 589 | comm_open(int sock_type, |
62e76326 | 590 | int proto, |
b7ac5457 | 591 | Ip::Address &addr, |
62e76326 | 592 | int flags, |
593 | const char *note) | |
d6827718 | 594 | { |
cc192b50 | 595 | return comm_openex(sock_type, proto, addr, flags, 0, note); |
d6827718 | 596 | } |
597 | ||
31be869c AJ |
598 | int |
599 | comm_open_listener(int sock_type, | |
04f7fd38 | 600 | int proto, |
b7ac5457 | 601 | Ip::Address &addr, |
04f7fd38 AJ |
602 | int flags, |
603 | const char *note) | |
31be869c AJ |
604 | { |
605 | int sock = -1; | |
606 | ||
ac760b5e AJ |
607 | /* all listener sockets require bind() */ |
608 | flags |= COMM_DOBIND; | |
609 | ||
31be869c AJ |
610 | /* attempt native enabled port. */ |
611 | sock = comm_openex(sock_type, proto, addr, flags, 0, note); | |
612 | ||
31be869c AJ |
613 | return sock; |
614 | } | |
615 | ||
2d8c0b1a | 616 | static bool |
617 | limitError(int const anErrno) | |
618 | { | |
619 | return anErrno == ENFILE || anErrno == EMFILE; | |
620 | } | |
d6827718 | 621 | |
057f5854 | 622 | int |
623 | comm_set_tos(int fd, int tos) | |
624 | { | |
625 | #ifdef IP_TOS | |
9e008dda AJ |
626 | int x = setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)); |
627 | if (x < 0) | |
628 | debugs(50, 1, "comm_set_tos: setsockopt(IP_TOS) on FD " << fd << ": " << xstrerror()); | |
629 | return x; | |
057f5854 | 630 | #else |
9e008dda AJ |
631 | debugs(50, 0, "WARNING: setsockopt(IP_TOS) not supported on this platform"); |
632 | return -1; | |
057f5854 | 633 | #endif |
634 | } | |
635 | ||
cc192b50 | 636 | void |
637 | comm_set_v6only(int fd, int tos) | |
638 | { | |
639 | #ifdef IPV6_V6ONLY | |
640 | if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) < 0) { | |
7e07ced1 | 641 | debugs(50, 1, "comm_open: setsockopt(IPV6_V6ONLY) " << (tos?"ON":"OFF") << " for FD " << fd << ": " << xstrerror()); |
cc192b50 | 642 | } |
643 | #else | |
644 | debugs(50, 0, "WARNING: comm_open: setsockopt(IPV6_V6ONLY) not supported on this platform"); | |
645 | #endif /* sockopt */ | |
646 | } | |
057f5854 | 647 | |
40d6264d AJ |
648 | /** |
649 | * Set the socket IP_TRANSPARENT option for Linux TPROXY v4 support. | |
650 | */ | |
f1e0717c | 651 | void |
e950e673 | 652 | comm_set_transparent(int fd) |
f1e0717c | 653 | { |
2ad20b4f | 654 | #if defined(IP_TRANSPARENT) |
e950e673 | 655 | int tos = 1; |
ef88b51d AJ |
656 | if (setsockopt(fd, SOL_IP, IP_TRANSPARENT, (char *) &tos, sizeof(int)) < 0) { |
657 | debugs(50, DBG_IMPORTANT, "comm_open: setsockopt(IP_TRANSPARENT) on FD " << fd << ": " << xstrerror()); | |
9e008dda | 658 | } else { |
3949d8b7 AJ |
659 | /* mark the socket as having transparent options */ |
660 | fd_table[fd].flags.transparent = 1; | |
661 | } | |
f1e0717c | 662 | #else |
ef88b51d | 663 | debugs(50, DBG_CRITICAL, "WARNING: comm_open: setsockopt(IP_TRANSPARENT) not supported on this platform"); |
f1e0717c AJ |
664 | #endif /* sockopt */ |
665 | } | |
666 | ||
e1a88700 | 667 | /** |
668 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
669 | * is OR of flags specified in defines.h:COMM_* | |
670 | */ | |
d6827718 | 671 | int |
672 | comm_openex(int sock_type, | |
62e76326 | 673 | int proto, |
b7ac5457 | 674 | Ip::Address &addr, |
62e76326 | 675 | int flags, |
676 | unsigned char TOS, | |
677 | const char *note) | |
090089c4 | 678 | { |
679 | int new_socket; | |
76f87348 | 680 | fde *F = NULL; |
cc192b50 | 681 | int tos = 0; |
682 | struct addrinfo *AI = NULL; | |
090089c4 | 683 | |
88bfe092 | 684 | PROF_start(comm_open); |
090089c4 | 685 | /* Create socket for accepting new connections. */ |
83704487 | 686 | statCounter.syscalls.sock.sockets++; |
62e76326 | 687 | |
cc192b50 | 688 | /* Setup the socket addrinfo details for use */ |
689 | addr.GetAddrInfo(AI); | |
690 | AI->ai_socktype = sock_type; | |
691 | AI->ai_protocol = proto; | |
cc192b50 | 692 | |
693 | debugs(50, 3, "comm_openex: Attempt open socket for: " << addr ); | |
694 | ||
0eb08770 HN |
695 | new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); |
696 | #if USE_IPV6 | |
697 | /* under IPv6 there is the possibility IPv6 is present but disabled. */ | |
698 | /* try again as IPv4-native if possible */ | |
699 | if ( new_socket < 0 && addr.IsIPv6() && addr.SetIPv4() ) { | |
700 | /* attempt to open this IPv4-only. */ | |
701 | addr.FreeAddrInfo(AI); | |
702 | /* Setup the socket addrinfo details for use */ | |
703 | addr.GetAddrInfo(AI); | |
704 | AI->ai_socktype = sock_type; | |
705 | AI->ai_protocol = proto; | |
706 | debugs(50, 3, "comm_openex: Attempt fallback open socket for: " << addr ); | |
ec505200 | 707 | new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); |
0eb08770 HN |
708 | debugs(50, 2, HERE << "attempt open " << note << " socket on: " << addr); |
709 | } | |
710 | #endif | |
711 | ||
712 | if (new_socket < 0) { | |
62e76326 | 713 | /* Increase the number of reserved fd's if calls to socket() |
714 | * are failing because the open file table is full. This | |
715 | * limits the number of simultaneous clients */ | |
716 | ||
2d8c0b1a | 717 | if (limitError(errno)) { |
dd4e714f | 718 | debugs(50, DBG_IMPORTANT, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 719 | fdAdjustReserved(); |
2d8c0b1a | 720 | } else { |
8ca8bd92 | 721 | debugs(50, DBG_CRITICAL, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 722 | } |
723 | ||
cc192b50 | 724 | addr.FreeAddrInfo(AI); |
725 | ||
62e76326 | 726 | PROF_stop(comm_open); |
727 | return -1; | |
090089c4 | 728 | } |
62e76326 | 729 | |
cc192b50 | 730 | debugs(50, 3, "comm_openex: Opened socket FD " << new_socket << " : family=" << AI->ai_family << ", type=" << AI->ai_socktype << ", protocol=" << AI->ai_protocol ); |
731 | ||
d6827718 | 732 | /* set TOS if needed */ |
cc192b50 | 733 | if (TOS && comm_set_tos(new_socket, TOS) ) { |
62e76326 | 734 | tos = TOS; |
cc192b50 | 735 | } |
62e76326 | 736 | |
cc192b50 | 737 | #if IPV6_SPECIAL_SPLITSTACK |
62e76326 | 738 | |
9e008dda | 739 | if ( addr.IsIPv6() ) |
7e07ced1 | 740 | comm_set_v6only(new_socket, 1); |
62e76326 | 741 | |
d6827718 | 742 | #endif |
62e76326 | 743 | |
9b1f7ee8 | 744 | #if IPV6_SPECIAL_V4MAPPED |
cc192b50 | 745 | |
746 | /* Windows Vista supports Dual-Sockets. BUT defaults them to V6ONLY. Turn it OFF. */ | |
9b1f7ee8 | 747 | /* Other OS may have this administratively disabled for general use. Same deal. */ |
9e008dda | 748 | if ( addr.IsIPv6() ) |
cc192b50 | 749 | comm_set_v6only(new_socket, 0); |
750 | ||
751 | #endif | |
62e76326 | 752 | |
090089c4 | 753 | /* update fdstat */ |
bf8fe701 | 754 | debugs(5, 5, "comm_open: FD " << new_socket << " is a new socket"); |
62e76326 | 755 | |
b0469965 | 756 | assert(!isOpen(new_socket)); |
5c5783a2 | 757 | fd_open(new_socket, FD_SOCKET, note); |
62e76326 | 758 | |
c4b7a5a9 | 759 | fdd_table[new_socket].close_file = NULL; |
62e76326 | 760 | |
c4b7a5a9 | 761 | fdd_table[new_socket].close_line = 0; |
62e76326 | 762 | |
76f87348 | 763 | F = &fd_table[new_socket]; |
62e76326 | 764 | |
d6827718 | 765 | F->local_addr = addr; |
62e76326 | 766 | |
cc192b50 | 767 | F->tos = TOS; |
768 | ||
769 | F->sock_family = AI->ai_family; | |
62e76326 | 770 | |
79a15e0a | 771 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 772 | commSetCloseOnExec(new_socket); |
773 | ||
cdc33f35 | 774 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 775 | commSetReuseAddr(new_socket); |
776 | ||
9e008dda | 777 | if (addr.GetPort() > (u_short) 0) { |
a50bfe93 | 778 | #ifdef _SQUID_MSWIN_ |
a50bfe93 | 779 | if (sock_type != SOCK_DGRAM) |
780 | #endif | |
a50bfe93 | 781 | commSetNoLinger(new_socket); |
62e76326 | 782 | |
783 | if (opt_reuseaddr) | |
784 | commSetReuseAddr(new_socket); | |
090089c4 | 785 | } |
62e76326 | 786 | |
a35595cd | 787 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
9e008dda | 788 | if ((flags & COMM_TRANSPARENT)) { |
a35595cd AJ |
789 | comm_set_transparent(new_socket); |
790 | } | |
a35595cd | 791 | |
ac760b5e AJ |
792 | if ( (flags & COMM_DOBIND) || addr.GetPort() > 0 || !addr.IsAnyAddr() ) { |
793 | if ( !(flags & COMM_DOBIND) && addr.IsAnyAddr() ) | |
794 | debugs(5,1,"WARNING: Squid is attempting to bind() port " << addr << " without being a listener."); | |
795 | if ( addr.IsNoAddr() ) | |
796 | debugs(5,0,"CRITICAL: Squid is attempting to bind() port " << addr << "!!"); | |
797 | ||
cc192b50 | 798 | if (commBind(new_socket, *AI) != COMM_OK) { |
62e76326 | 799 | comm_close(new_socket); |
cc192b50 | 800 | addr.FreeAddrInfo(AI); |
62e76326 | 801 | return -1; |
802 | PROF_stop(comm_open); | |
803 | } | |
23ff6968 | 804 | } |
62e76326 | 805 | |
cc192b50 | 806 | addr.FreeAddrInfo(AI); |
090089c4 | 807 | |
79a15e0a | 808 | if (flags & COMM_NONBLOCKING) |
9e008dda | 809 | if (commSetNonBlocking(new_socket) == COMM_ERROR) { |
62e76326 | 810 | return -1; |
811 | PROF_stop(comm_open); | |
812 | } | |
813 | ||
30a4f2a8 | 814 | #ifdef TCP_NODELAY |
815 | if (sock_type == SOCK_STREAM) | |
62e76326 | 816 | commSetTcpNoDelay(new_socket); |
817 | ||
30a4f2a8 | 818 | #endif |
62e76326 | 819 | |
1241e63e | 820 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 821 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
822 | ||
88bfe092 | 823 | PROF_stop(comm_open); |
62e76326 | 824 | |
090089c4 | 825 | return new_socket; |
826 | } | |
827 | ||
d2d59a68 | 828 | CBDATA_CLASS_INIT(ConnectStateData); |
829 | ||
830 | void * | |
831 | ConnectStateData::operator new (size_t size) | |
832 | { | |
833 | CBDATA_INIT_TYPE(ConnectStateData); | |
834 | return cbdataAlloc(ConnectStateData); | |
835 | } | |
836 | ||
837 | void | |
838 | ConnectStateData::operator delete (void *address) | |
839 | { | |
840 | cbdataFree(address); | |
841 | } | |
842 | ||
b0469965 | 843 | |
844 | ||
e5f6c5c2 | 845 | void |
b0469965 | 846 | commConnectStart(int fd, const char *host, u_short port, AsyncCall::Pointer &cb) |
e924600d | 847 | { |
b0469965 | 848 | debugs(cb->debugSection, cb->debugLevel, "commConnectStart: FD " << fd << |
9e008dda | 849 | ", cb " << cb << ", " << host << ":" << port); // TODO: just print *cb |
b0469965 | 850 | |
28c60158 | 851 | ConnectStateData *cs; |
d2d59a68 | 852 | cs = new ConnectStateData; |
03a1ee42 | 853 | cs->fd = fd; |
e924600d | 854 | cs->host = xstrdup(host); |
cc192b50 | 855 | cs->default_port = port; |
b0469965 | 856 | cs->callback = cb; |
857 | ||
e924600d | 858 | comm_add_close_handler(fd, commConnectFree, cs); |
8407afee | 859 | ipcache_nbgethostbyname(host, commConnectDnsHandle, cs); |
edeb28fd | 860 | } |
861 | ||
b0469965 | 862 | // TODO: Remove this and similar callback registration functions by replacing |
863 | // (callback,data) parameters with an AsyncCall so that we do not have to use | |
864 | // a generic call name and debug level when creating an AsyncCall. This will | |
865 | // also cut the number of callback registration routines in half. | |
866 | void | |
867 | commConnectStart(int fd, const char *host, u_short port, CNCB * callback, void *data) | |
868 | { | |
869 | debugs(5, 5, "commConnectStart: FD " << fd << ", data " << data << ", " << host << ":" << port); | |
870 | AsyncCall::Pointer call = commCbCall(5,3, | |
9e008dda | 871 | "SomeCommConnectHandler", CommConnectCbPtrFun(callback, data)); |
b0469965 | 872 | commConnectStart(fd, host, port, call); |
873 | } | |
874 | ||
edeb28fd | 875 | static void |
3ff65596 | 876 | commConnectDnsHandle(const ipcache_addrs *ia, const DnsLookupDetails &details, void *data) |
edeb28fd | 877 | { |
e6ccf245 | 878 | ConnectStateData *cs = (ConnectStateData *)data; |
3ff65596 | 879 | cs->dns = details; |
62e76326 | 880 | |
edeb28fd | 881 | if (ia == NULL) { |
bf8fe701 | 882 | debugs(5, 3, "commConnectDnsHandle: Unknown host: " << cs->host); |
2d8c0b1a | 883 | cs->callCallback(COMM_ERR_DNS, 0); |
62e76326 | 884 | return; |
edeb28fd | 885 | } |
62e76326 | 886 | |
f076b37b | 887 | assert(ia->cur < ia->count); |
cc192b50 | 888 | |
889 | cs->default_addr = ia->in_addrs[ia->cur]; | |
a12a049a | 890 | |
891 | if (Config.onoff.balance_on_multiple_ip) | |
892 | ipcacheCycleAddr(cs->host, NULL); | |
893 | ||
22c653cd | 894 | cs->addrcount = ia->count; |
a12a049a | 895 | |
22c653cd | 896 | cs->connstart = squid_curtime; |
a12a049a | 897 | |
2d8c0b1a | 898 | cs->connect(); |
e924600d | 899 | } |
900 | ||
2d8c0b1a | 901 | void |
902 | ConnectStateData::callCallback(comm_err_t status, int xerrno) | |
903 | { | |
b0469965 | 904 | debugs(5, 3, "commConnectCallback: FD " << fd); |
bf8fe701 | 905 | |
2d8c0b1a | 906 | comm_remove_close_handler(fd, commConnectFree, this); |
e1b16349 | 907 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 908 | |
b0469965 | 909 | typedef CommConnectCbParams Params; |
910 | Params ¶ms = GetCommParams<Params>(callback); | |
911 | params.fd = fd; | |
3ff65596 | 912 | params.dns = dns; |
b0469965 | 913 | params.flag = status; |
914 | params.xerrno = xerrno; | |
915 | ScheduleCallHere(callback); | |
916 | callback = NULL; | |
62e76326 | 917 | |
744c68f5 | 918 | commConnectFree(fd, this); |
f88211e8 | 919 | } |
920 | ||
e924600d | 921 | static void |
9daca08e | 922 | commConnectFree(int fd, void *data) |
e924600d | 923 | { |
e6ccf245 | 924 | ConnectStateData *cs = (ConnectStateData *)data; |
bf8fe701 | 925 | debugs(5, 3, "commConnectFree: FD " << fd); |
b0469965 | 926 | // delete cs->callback; |
927 | cs->callback = NULL; | |
8407afee | 928 | safe_free(cs->host); |
00d77d6b | 929 | delete cs; |
e924600d | 930 | } |
931 | ||
2d8c0b1a | 932 | static void |
933 | copyFDFlags(int to, fde *F) | |
934 | { | |
935 | if (F->flags.close_on_exec) | |
936 | commSetCloseOnExec(to); | |
937 | ||
938 | if (F->flags.nonblocking) | |
939 | commSetNonBlocking(to); | |
940 | ||
941 | #ifdef TCP_NODELAY | |
942 | ||
943 | if (F->flags.nodelay) | |
944 | commSetTcpNoDelay(to); | |
945 | ||
946 | #endif | |
947 | ||
948 | if (Config.tcpRcvBufsz > 0) | |
949 | commSetTcpRcvbuf(to, Config.tcpRcvBufsz); | |
950 | } | |
951 | ||
22c653cd | 952 | /* Reset FD so that we can connect() again */ |
0b77ecd8 | 953 | int |
954 | ConnectStateData::commResetFD() | |
edeb28fd | 955 | { |
cc192b50 | 956 | |
b0469965 | 957 | // XXX: do we have to check this? |
958 | // | |
959 | // if (!cbdataReferenceValid(callback.data)) | |
960 | // return 0; | |
62e76326 | 961 | |
83704487 | 962 | statCounter.syscalls.sock.sockets++; |
62e76326 | 963 | |
3d98ff81 | 964 | fde *F = &fd_table[fd]; |
cc192b50 | 965 | |
3d98ff81 HN |
966 | struct addrinfo *AI = NULL; |
967 | F->local_addr.GetAddrInfo(AI); | |
968 | int new_family = AI->ai_family; | |
cc192b50 | 969 | |
3d98ff81 | 970 | int fd2 = socket(new_family, AI->ai_socktype, AI->ai_protocol); |
62e76326 | 971 | |
edeb28fd | 972 | if (fd2 < 0) { |
8ca8bd92 | 973 | debugs(5, DBG_CRITICAL, HERE << "WARNING: FD " << fd2 << " socket failed to allocate: " << xstrerror()); |
62e76326 | 974 | |
975 | if (ENFILE == errno || EMFILE == errno) | |
976 | fdAdjustReserved(); | |
977 | ||
3d98ff81 | 978 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 979 | return 0; |
edeb28fd | 980 | } |
62e76326 | 981 | |
68aa4272 | 982 | #ifdef _SQUID_MSWIN_ |
983 | ||
984 | /* On Windows dup2() can't work correctly on Sockets, the */ | |
985 | /* workaround is to close the destination Socket before call them. */ | |
0b77ecd8 | 986 | close(fd); |
68aa4272 | 987 | |
988 | #endif | |
989 | ||
0b77ecd8 | 990 | if (dup2(fd2, fd) < 0) { |
8ca8bd92 | 991 | debugs(5, DBG_CRITICAL, HERE << "WARNING: dup2(FD " << fd2 << ", FD " << fd << ") failed: " << xstrerror()); |
62e76326 | 992 | |
993 | if (ENFILE == errno || EMFILE == errno) | |
994 | fdAdjustReserved(); | |
995 | ||
996 | close(fd2); | |
997 | ||
3d98ff81 | 998 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 999 | return 0; |
edeb28fd | 1000 | } |
3a5a4930 | 1001 | commResetSelect(fd); |
62e76326 | 1002 | |
edeb28fd | 1003 | close(fd2); |
9d92af86 | 1004 | |
6084c0b6 AJ |
1005 | debugs(50, 3, "commResetFD: Reset socket FD " << fd << "->" << fd2 << " : family=" << new_family ); |
1006 | ||
9d92af86 | 1007 | /* INET6: copy the new sockets family type to the FDE table */ |
3d98ff81 HN |
1008 | F->sock_family = new_family; |
1009 | ||
1010 | F->flags.called_connect = 0; | |
9d92af86 | 1011 | |
09544acc | 1012 | /* |
1013 | * yuck, this has assumptions about comm_open() arguments for | |
1014 | * the original socket | |
1015 | */ | |
62e76326 | 1016 | |
e17b4929 | 1017 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
9e008dda | 1018 | if ( F->flags.transparent ) { |
e17b4929 AJ |
1019 | comm_set_transparent(fd); |
1020 | } | |
1021 | ||
cc192b50 | 1022 | if (commBind(fd, *AI) != COMM_OK) { |
68d57d84 | 1023 | debugs(5, DBG_CRITICAL, "WARNING: Reset of FD " << fd << " for " << F->local_addr << " failed to bind: " << xstrerror()); |
cc192b50 | 1024 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 1025 | return 0; |
09544acc | 1026 | } |
cc192b50 | 1027 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 1028 | |
cc192b50 | 1029 | if (F->tos) |
1030 | comm_set_tos(fd, F->tos); | |
1031 | ||
1032 | #if IPV6_SPECIAL_SPLITSTACK | |
9e008dda | 1033 | if ( F->local_addr.IsIPv6() ) |
7e07ced1 | 1034 | comm_set_v6only(fd, 1); |
d6827718 | 1035 | #endif |
cc192b50 | 1036 | |
f3767a6a | 1037 | copyFDFlags(fd, F); |
62e76326 | 1038 | |
edeb28fd | 1039 | return 1; |
1040 | } | |
1041 | ||
0b77ecd8 | 1042 | int |
1043 | ConnectStateData::commRetryConnect() | |
22c653cd | 1044 | { |
0b77ecd8 | 1045 | assert(addrcount > 0); |
62e76326 | 1046 | |
0b77ecd8 | 1047 | if (addrcount == 1) { |
1048 | if (tries >= Config.retry.maxtries) | |
62e76326 | 1049 | return 0; |
1050 | ||
0b77ecd8 | 1051 | if (squid_curtime - connstart > Config.Timeout.connect) |
62e76326 | 1052 | return 0; |
22c653cd | 1053 | } else { |
ec505200 HN |
1054 | if (tries > addrcount) { |
1055 | /* Flush bad address count in case we are | |
1056 | * skipping over incompatible protocol | |
1057 | */ | |
1058 | ipcacheMarkAllGood(host); | |
62e76326 | 1059 | return 0; |
ec505200 | 1060 | } |
22c653cd | 1061 | } |
62e76326 | 1062 | |
0b77ecd8 | 1063 | return commResetFD(); |
22c653cd | 1064 | } |
1065 | ||
4ed0e075 | 1066 | static void |
1067 | commReconnect(void *data) | |
1068 | { | |
1069 | ConnectStateData *cs = (ConnectStateData *)data; | |
1070 | ipcache_nbgethostbyname(cs->host, commConnectDnsHandle, cs); | |
1071 | } | |
1072 | ||
f3767a6a | 1073 | /** Connect SOCK to specified DEST_PORT at DEST_HOST. */ |
2d8c0b1a | 1074 | void |
f3767a6a | 1075 | ConnectStateData::Connect(int fd, void *me) |
090089c4 | 1076 | { |
2d8c0b1a | 1077 | ConnectStateData *cs = (ConnectStateData *)me; |
1078 | assert (cs->fd == fd); | |
1079 | cs->connect(); | |
1080 | } | |
1081 | ||
1082 | void | |
1083 | ConnectStateData::defaults() | |
1084 | { | |
cc192b50 | 1085 | S = default_addr; |
1086 | S.SetPort(default_port); | |
2d8c0b1a | 1087 | } |
62e76326 | 1088 | |
2d8c0b1a | 1089 | void |
1090 | ConnectStateData::connect() | |
1091 | { | |
3d98ff81 | 1092 | defaults(); |
62e76326 | 1093 | |
f3767a6a | 1094 | debugs(5,5, HERE << "to " << S); |
cc192b50 | 1095 | |
1096 | switch (comm_connect_addr(fd, S) ) { | |
62e76326 | 1097 | |
e5f6c5c2 | 1098 | case COMM_INPROGRESS: |
f3767a6a | 1099 | debugs(5, 5, HERE << "FD " << fd << ": COMM_INPROGRESS"); |
2d8c0b1a | 1100 | commSetSelect(fd, COMM_SELECT_WRITE, ConnectStateData::Connect, this, 0); |
62e76326 | 1101 | break; |
1102 | ||
e5f6c5c2 | 1103 | case COMM_OK: |
f3767a6a | 1104 | debugs(5, 5, HERE << "FD " << fd << ": COMM_OK - connected"); |
cc192b50 | 1105 | ipcacheMarkGoodAddr(host, S); |
2d8c0b1a | 1106 | callCallback(COMM_OK, 0); |
62e76326 | 1107 | break; |
1108 | ||
9d92af86 | 1109 | case COMM_ERR_PROTOCOL: |
3d98ff81 | 1110 | debugs(5, 5, HERE "FD " << fd << ": COMM_ERR_PROTOCOL - try again"); |
9d92af86 | 1111 | /* problem using the desired protocol over this socket. |
3d98ff81 HN |
1112 | * skip to the next address and hope it's more compatible |
1113 | * but do not mark the current address as bad | |
1114 | */ | |
9d92af86 | 1115 | tries++; |
3d98ff81 HN |
1116 | if (commRetryConnect()) { |
1117 | /* Force an addr cycle to move forward to the next possible address */ | |
1118 | ipcacheCycleAddr(host, NULL); | |
1119 | eventAdd("commReconnect", commReconnect, this, this->addrcount == 1 ? 0.05 : 0.0, 0); | |
1120 | } else { | |
1121 | debugs(5, 5, HERE << "FD " << fd << ": COMM_ERR_PROTOCOL - ERR tried too many times already."); | |
1122 | callCallback(COMM_ERR_CONNECT, errno); | |
1123 | } | |
9d92af86 | 1124 | break; |
9d92af86 | 1125 | |
e5f6c5c2 | 1126 | default: |
f3767a6a | 1127 | debugs(5, 5, HERE "FD " << fd << ": * - try again"); |
2d8c0b1a | 1128 | tries++; |
cc192b50 | 1129 | ipcacheMarkBadAddr(host, S); |
62e76326 | 1130 | |
9b5c4a9a | 1131 | #if USE_ICMP |
62e76326 | 1132 | if (Config.onoff.test_reachability) |
cc192b50 | 1133 | netdbDeleteAddrNetwork(S); |
9b5c4a9a | 1134 | #endif |
62e76326 | 1135 | |
0b77ecd8 | 1136 | if (commRetryConnect()) { |
4ed0e075 | 1137 | eventAdd("commReconnect", commReconnect, this, this->addrcount == 1 ? 0.05 : 0.0, 0); |
62e76326 | 1138 | } else { |
f3767a6a | 1139 | debugs(5, 5, HERE << "FD " << fd << ": * - ERR tried too many times already."); |
2d8c0b1a | 1140 | callCallback(COMM_ERR_CONNECT, errno); |
62e76326 | 1141 | } |
090089c4 | 1142 | } |
090089c4 | 1143 | } |
b0469965 | 1144 | /* |
b8d8561b | 1145 | int |
b0469965 | 1146 | commSetTimeout_old(int fd, int timeout, PF * handler, void *data) |
090089c4 | 1147 | { |
f3767a6a | 1148 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
03eb2f01 | 1149 | assert(fd >= 0); |
1150 | assert(fd < Squid_MaxFD); | |
2d8c0b1a | 1151 | fde *F = &fd_table[fd]; |
60c0b5a2 | 1152 | assert(F->flags.open); |
62e76326 | 1153 | |
5c5783a2 | 1154 | if (timeout < 0) { |
62e76326 | 1155 | cbdataReferenceDone(F->timeout_data); |
1156 | F->timeout_handler = NULL; | |
1157 | F->timeout = 0; | |
5849612f | 1158 | } else { |
62e76326 | 1159 | if (handler) { |
1160 | cbdataReferenceDone(F->timeout_data); | |
1161 | F->timeout_handler = handler; | |
1162 | F->timeout_data = cbdataReference(data); | |
1163 | } | |
1164 | ||
1165 | F->timeout = squid_curtime + (time_t) timeout; | |
30a4f2a8 | 1166 | } |
62e76326 | 1167 | |
a3fa14bf | 1168 | return F->timeout; |
090089c4 | 1169 | } |
b0469965 | 1170 | */ |
1171 | ||
1172 | int | |
1173 | commSetTimeout(int fd, int timeout, PF * handler, void *data) | |
1174 | { | |
1175 | AsyncCall::Pointer call; | |
f3767a6a | 1176 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
9e008dda AJ |
1177 | if (handler != NULL) |
1178 | call=commCbCall(5,4, "SomeTimeoutHandler", CommTimeoutCbPtrFun(handler, data)); | |
b0469965 | 1179 | else |
9e008dda | 1180 | call = NULL; |
b0469965 | 1181 | return commSetTimeout(fd, timeout, call); |
1182 | } | |
1183 | ||
1184 | ||
1185 | int commSetTimeout(int fd, int timeout, AsyncCall::Pointer &callback) | |
1186 | { | |
f3767a6a | 1187 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
b0469965 | 1188 | assert(fd >= 0); |
1189 | assert(fd < Squid_MaxFD); | |
1190 | fde *F = &fd_table[fd]; | |
1191 | assert(F->flags.open); | |
1192 | ||
1193 | if (timeout < 0) { | |
1194 | F->timeoutHandler = NULL; | |
1195 | F->timeout = 0; | |
1196 | } else { | |
1197 | if (callback != NULL) { | |
9e008dda AJ |
1198 | typedef CommTimeoutCbParams Params; |
1199 | Params ¶ms = GetCommParams<Params>(callback); | |
1200 | params.fd = fd; | |
b0469965 | 1201 | F->timeoutHandler = callback; |
1202 | } | |
1203 | ||
1204 | F->timeout = squid_curtime + (time_t) timeout; | |
1205 | } | |
1206 | ||
1207 | return F->timeout; | |
1208 | ||
1209 | } | |
090089c4 | 1210 | |
b8d8561b | 1211 | int |
b7ac5457 | 1212 | comm_connect_addr(int sock, const Ip::Address &address) |
090089c4 | 1213 | { |
3d7e9d7c | 1214 | comm_err_t status = COMM_OK; |
76f87348 | 1215 | fde *F = &fd_table[sock]; |
cc192b50 | 1216 | int x = 0; |
b5568a61 | 1217 | int err = 0; |
9689d97c | 1218 | socklen_t errlen; |
feca3b9a | 1219 | struct addrinfo *AI = NULL; |
88bfe092 | 1220 | PROF_start(comm_connect_addr); |
cc192b50 | 1221 | |
1222 | assert(address.GetPort() != 0); | |
1223 | ||
b0469965 | 1224 | debugs(5, 9, "comm_connect_addr: connecting socket " << sock << " to " << address << " (want family: " << F->sock_family << ")"); |
cc192b50 | 1225 | |
3d98ff81 | 1226 | /* Handle IPv6 over IPv4-only socket case. |
9d92af86 | 1227 | * this case must presently be handled here since the GetAddrInfo asserts on bad mappings. |
3d98ff81 | 1228 | * NP: because commResetFD is private to ConnStateData we have to return an error and |
9d92af86 AJ |
1229 | * trust its handled properly. |
1230 | */ | |
9e008dda | 1231 | if (F->sock_family == AF_INET && !address.IsIPv4()) { |
3d98ff81 HN |
1232 | errno = ENETUNREACH; |
1233 | return COMM_ERR_PROTOCOL; | |
1234 | } | |
1235 | ||
1236 | /* Handle IPv4 over IPv6-only socket case. | |
1237 | * This case is presently handled here as it's both a known case and it's | |
1238 | * uncertain what error will be returned by the IPv6 stack in such case. It's | |
1239 | * possible this will also be handled by the errno checks below after connect() | |
1240 | * but needs carefull cross-platform verification, and verifying the address | |
1241 | * condition here is simple. | |
1242 | */ | |
1243 | if (!F->local_addr.IsIPv4() && address.IsIPv4()) { | |
1244 | errno = ENETUNREACH; | |
9d92af86 AJ |
1245 | return COMM_ERR_PROTOCOL; |
1246 | } | |
9d92af86 | 1247 | |
feca3b9a | 1248 | address.GetAddrInfo(AI, F->sock_family); |
cc192b50 | 1249 | |
090089c4 | 1250 | /* Establish connection. */ |
b5568a61 | 1251 | errno = 0; |
62e76326 | 1252 | |
9e008dda | 1253 | if (!F->flags.called_connect) { |
62e76326 | 1254 | F->flags.called_connect = 1; |
1255 | statCounter.syscalls.sock.connects++; | |
1256 | ||
feca3b9a | 1257 | x = connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 1258 | |
5a33a66a | 1259 | // XXX: ICAP code refuses callbacks during a pending comm_ call |
1260 | // Async calls development will fix this. | |
1261 | if (x == 0) { | |
1262 | x = -1; | |
1263 | errno = EINPROGRESS; | |
1264 | } | |
1265 | ||
9e008dda | 1266 | if (x < 0) { |
cc192b50 | 1267 | debugs(5,5, "comm_connect_addr: sock=" << sock << ", addrinfo( " << |
9e008dda AJ |
1268 | " flags=" << AI->ai_flags << |
1269 | ", family=" << AI->ai_family << | |
1270 | ", socktype=" << AI->ai_socktype << | |
1271 | ", protocol=" << AI->ai_protocol << | |
1272 | ", &addr=" << AI->ai_addr << | |
1273 | ", addrlen=" << AI->ai_addrlen << | |
1274 | " )" ); | |
cc192b50 | 1275 | debugs(5, 9, "connect FD " << sock << ": (" << x << ") " << xstrerror()); |
1276 | debugs(14,9, "connecting to: " << address ); | |
1277 | } | |
9e008dda | 1278 | } else { |
140e2c0b | 1279 | #if defined(_SQUID_NEWSOS6_) |
62e76326 | 1280 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
1281 | ||
feca3b9a | 1282 | connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 1283 | |
1284 | if (errno == EINVAL) { | |
1285 | errlen = sizeof(err); | |
1286 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1287 | ||
1288 | if (x >= 0) | |
1289 | errno = x; | |
1290 | } | |
1291 | ||
33ac9442 | 1292 | #else |
62e76326 | 1293 | errlen = sizeof(err); |
1294 | ||
1295 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1296 | ||
1297 | if (x == 0) | |
1298 | errno = err; | |
1299 | ||
b5568a61 | 1300 | #if defined(_SQUID_SOLARIS_) |
62e76326 | 1301 | /* |
1302 | * Solaris 2.4's socket emulation doesn't allow you | |
1303 | * to determine the error from a failed non-blocking | |
1304 | * connect and just returns EPIPE. Create a fake | |
1305 | * error message for connect. -- fenner@parc.xerox.com | |
1306 | */ | |
1307 | if (x < 0 && errno == EPIPE) | |
1308 | errno = ENOTCONN; | |
1309 | ||
33ac9442 | 1310 | #endif |
30a4f2a8 | 1311 | #endif |
62e76326 | 1312 | |
e5f6c5c2 | 1313 | } |
62e76326 | 1314 | |
9e008dda AJ |
1315 | /* Squid seems to be working fine without this code. With this code, |
1316 | * we leak memory on many connect requests because of EINPROGRESS. | |
1317 | * If you find that this code is needed, please file a bug report. */ | |
82ec8dfc | 1318 | #if 0 |
feca3b9a AJ |
1319 | #ifdef _SQUID_LINUX_ |
1320 | /* 2007-11-27: | |
9e008dda | 1321 | * Linux Debian replaces our allocated AI pointer with garbage when |
feca3b9a AJ |
1322 | * connect() fails. This leads to segmentation faults deallocating |
1323 | * the system-allocated memory when we go to clean up our pointer. | |
1324 | * HACK: is to leak the memory returned since we can't deallocate. | |
1325 | */ | |
9e008dda | 1326 | if (errno != 0) { |
feca3b9a AJ |
1327 | AI = NULL; |
1328 | } | |
82ec8dfc | 1329 | #endif |
feca3b9a AJ |
1330 | #endif |
1331 | ||
1332 | address.FreeAddrInfo(AI); | |
1333 | ||
88bfe092 | 1334 | PROF_stop(comm_connect_addr); |
62e76326 | 1335 | |
b5568a61 | 1336 | if (errno == 0 || errno == EISCONN) |
62e76326 | 1337 | status = COMM_OK; |
b5568a61 | 1338 | else if (ignoreErrno(errno)) |
62e76326 | 1339 | status = COMM_INPROGRESS; |
3d98ff81 HN |
1340 | else if (errno == EAFNOSUPPORT || errno == EINVAL) |
1341 | return COMM_ERR_PROTOCOL; | |
b5568a61 | 1342 | else |
3d98ff81 | 1343 | return COMM_ERROR; |
62e76326 | 1344 | |
cc192b50 | 1345 | address.NtoA(F->ipaddr, MAX_IPSTRLEN); |
62e76326 | 1346 | |
cc192b50 | 1347 | F->remote_port = address.GetPort(); /* remote_port is HS */ |
62e76326 | 1348 | |
9e008dda | 1349 | if (status == COMM_OK) { |
cc192b50 | 1350 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connected to " << address); |
9e008dda | 1351 | } else if (status == COMM_INPROGRESS) { |
bf8fe701 | 1352 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 1353 | } |
62e76326 | 1354 | |
090089c4 | 1355 | return status; |
1356 | } | |
1357 | ||
cb201b7e | 1358 | void |
1359 | commCallCloseHandlers(int fd) | |
1360 | { | |
76f87348 | 1361 | fde *F = &fd_table[fd]; |
bf8fe701 | 1362 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 1363 | |
8000a965 | 1364 | while (F->closeHandler != NULL) { |
b0469965 | 1365 | AsyncCall::Pointer call = F->closeHandler; |
9e008dda AJ |
1366 | F->closeHandler = call->Next(); |
1367 | call->setNext(NULL); | |
1368 | // If call is not canceled schedule it for execution else ignore it | |
1369 | if (!call->canceled()) { | |
1370 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << call); | |
1371 | typedef CommCloseCbParams Params; | |
1372 | Params ¶ms = GetCommParams<Params>(call); | |
1373 | params.fd = fd; | |
1374 | ScheduleCallHere(call); | |
1375 | } | |
cb201b7e | 1376 | } |
1377 | } | |
1378 | ||
5492ad1d | 1379 | #if LINGERING_CLOSE |
1380 | static void | |
1381 | commLingerClose(int fd, void *unused) | |
1382 | { | |
1383 | LOCAL_ARRAY(char, buf, 1024); | |
1384 | int n; | |
1f7c9178 | 1385 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 1386 | |
5492ad1d | 1387 | if (n < 0) |
bf8fe701 | 1388 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1389 | |
5492ad1d | 1390 | comm_close(fd); |
1391 | } | |
1392 | ||
1393 | static void | |
1394 | commLingerTimeout(int fd, void *unused) | |
1395 | { | |
bf8fe701 | 1396 | debugs(5, 3, "commLingerTimeout: FD " << fd); |
5492ad1d | 1397 | comm_close(fd); |
1398 | } | |
1399 | ||
1400 | /* | |
1401 | * Inspired by apache | |
1402 | */ | |
1403 | void | |
1404 | comm_lingering_close(int fd) | |
1405 | { | |
d4c19b39 | 1406 | #if USE_SSL |
62e76326 | 1407 | |
d4c19b39 | 1408 | if (fd_table[fd].ssl) |
62e76326 | 1409 | ssl_shutdown_method(fd); |
1410 | ||
d4c19b39 | 1411 | #endif |
62e76326 | 1412 | |
5492ad1d | 1413 | if (shutdown(fd, 1) < 0) { |
62e76326 | 1414 | comm_close(fd); |
1415 | return; | |
5492ad1d | 1416 | } |
62e76326 | 1417 | |
5492ad1d | 1418 | fd_note(fd, "lingering close"); |
1419 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
1420 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
1421 | } | |
62e76326 | 1422 | |
5492ad1d | 1423 | #endif |
1424 | ||
98264874 | 1425 | /* |
1426 | * enable linger with time of 0 so that when the socket is | |
1427 | * closed, TCP generates a RESET | |
1428 | */ | |
1429 | void | |
1430 | comm_reset_close(int fd) | |
1431 | { | |
62e76326 | 1432 | |
98264874 | 1433 | struct linger L; |
1434 | L.l_onoff = 1; | |
1435 | L.l_linger = 0; | |
62e76326 | 1436 | |
98264874 | 1437 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
468fe1b5 | 1438 | debugs(50, DBG_CRITICAL, "ERROR: Closing FD " << fd << " with TCP RST: " << xstrerror()); |
62e76326 | 1439 | |
98264874 | 1440 | comm_close(fd); |
1441 | } | |
1442 | ||
9e008dda | 1443 | void |
10b06767 AJ |
1444 | comm_close_start(int fd, void *data) |
1445 | { | |
10b06767 | 1446 | #if USE_SSL |
86dedcc1 | 1447 | fde *F = &fd_table[fd]; |
10b06767 AJ |
1448 | if (F->ssl) |
1449 | ssl_shutdown_method(fd); | |
1450 | ||
1451 | #endif | |
1452 | ||
1453 | } | |
1454 | ||
9e008dda | 1455 | void |
b0469965 | 1456 | comm_close_complete(int fd, void *data) |
2d8c0b1a | 1457 | { |
b0469965 | 1458 | #if USE_SSL |
1459 | fde *F = &fd_table[fd]; | |
2d8c0b1a | 1460 | |
b0469965 | 1461 | if (F->ssl) { |
1462 | SSL_free(F->ssl); | |
1463 | F->ssl = NULL; | |
1464 | } | |
2d8c0b1a | 1465 | |
b0469965 | 1466 | #endif |
1467 | fd_close(fd); /* update fdstat */ | |
1468 | ||
1469 | close(fd); | |
1470 | ||
b0469965 | 1471 | statCounter.syscalls.sock.closes++; |
1472 | ||
1473 | /* When an fd closes, give accept() a chance, if need be */ | |
04f55905 | 1474 | Comm::AcceptLimiter::Instance().kick(); |
2d8c0b1a | 1475 | } |
c4b7a5a9 | 1476 | |
1477 | /* | |
1478 | * Close the socket fd. | |
1479 | * | |
1480 | * + call write handlers with ERR_CLOSING | |
1481 | * + call read handlers with ERR_CLOSING | |
1482 | * + call closing handlers | |
a46d2c0e | 1483 | * |
9e008dda | 1484 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a |
a46d2c0e | 1485 | * DeferredReadManager. |
c4b7a5a9 | 1486 | */ |
b8d8561b | 1487 | void |
43ae1d95 | 1488 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1489 | { |
82ec8dfc | 1490 | debugs(5, 3, "comm_close: start closing FD " << fd); |
03eb2f01 | 1491 | assert(fd >= 0); |
1492 | assert(fd < Squid_MaxFD); | |
82ec8dfc AR |
1493 | |
1494 | fde *F = &fd_table[fd]; | |
c4b7a5a9 | 1495 | fdd_table[fd].close_file = file; |
1496 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1497 | |
82ec8dfc | 1498 | if (F->closing()) |
62e76326 | 1499 | return; |
1500 | ||
36afac26 | 1501 | /* XXX: is this obsolete behind F->closing() ? */ |
b8869bcf | 1502 | if ( (shutting_down || reconfiguring) && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1503 | return; |
1504 | ||
c4b7a5a9 | 1505 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
b0469965 | 1506 | assert(isOpen(fd)); |
62e76326 | 1507 | |
76f87348 | 1508 | assert(F->type != FD_FILE); |
62e76326 | 1509 | |
88bfe092 | 1510 | PROF_start(comm_close); |
62e76326 | 1511 | |
10b06767 | 1512 | F->flags.close_request = 1; |
62e76326 | 1513 | |
10b06767 | 1514 | AsyncCall::Pointer startCall=commCbCall(5,4, "comm_close_start", |
9e008dda | 1515 | CommCloseCbPtrFun(comm_close_start, NULL)); |
10b06767 AJ |
1516 | typedef CommCloseCbParams Params; |
1517 | Params &startParams = GetCommParams<Params>(startCall); | |
1518 | startParams.fd = fd; | |
1519 | ScheduleCallHere(startCall); | |
62e76326 | 1520 | |
74257126 AR |
1521 | // a half-closed fd may lack a reader, so we stop monitoring explicitly |
1522 | if (commHasHalfClosedMonitor(fd)) | |
1523 | commStopHalfClosedMonitor(fd); | |
fa80a8ef | 1524 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1525 | |
82ec8dfc | 1526 | // notify read/write handlers |
2b663917 | 1527 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { |
b0469965 | 1528 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1529 | } |
1530 | if (commio_has_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd))) { | |
b0469965 | 1531 | commio_finish_callback(fd, COMMIO_FD_READCB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1532 | } |
2d8c0b1a | 1533 | |
cb201b7e | 1534 | commCallCloseHandlers(fd); |
62e76326 | 1535 | |
781ce8ff | 1536 | if (F->pconn.uses) |
1537 | F->pconn.pool->count(F->pconn.uses); | |
62e76326 | 1538 | |
a7ad6e4e | 1539 | comm_empty_os_read_buffers(fd); |
9e008dda | 1540 | |
62e76326 | 1541 | |
10b06767 | 1542 | AsyncCall::Pointer completeCall=commCbCall(5,4, "comm_close_complete", |
9e008dda | 1543 | CommCloseCbPtrFun(comm_close_complete, NULL)); |
10b06767 AJ |
1544 | Params &completeParams = GetCommParams<Params>(completeCall); |
1545 | completeParams.fd = fd; | |
9e008dda | 1546 | // must use async call to wait for all callbacks |
82ec8dfc | 1547 | // scheduled before comm_close() to finish |
10b06767 | 1548 | ScheduleCallHere(completeCall); |
62e76326 | 1549 | |
88bfe092 | 1550 | PROF_stop(comm_close); |
090089c4 | 1551 | } |
1552 | ||
090089c4 | 1553 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1554 | int |
5df61230 | 1555 | comm_udp_sendto(int fd, |
b7ac5457 | 1556 | const Ip::Address &to_addr, |
62e76326 | 1557 | const void *buf, |
1558 | int len) | |
090089c4 | 1559 | { |
cc192b50 | 1560 | int x = 0; |
1561 | struct addrinfo *AI = NULL; | |
1562 | ||
88bfe092 | 1563 | PROF_start(comm_udp_sendto); |
83704487 | 1564 | statCounter.syscalls.sock.sendtos++; |
62e76326 | 1565 | |
cc192b50 | 1566 | debugs(50, 3, "comm_udp_sendto: Attempt to send UDP packet to " << to_addr << |
9e008dda | 1567 | " using FD " << fd << " using Port " << comm_local_port(fd) ); |
cc192b50 | 1568 | |
1569 | /* BUG: something in the above macro appears to occasionally be setting AI to garbage. */ | |
1570 | /* AYJ: 2007-08-27 : or was it because I wasn't then setting 'fd_table[fd].sock_family' to fill properly. */ | |
1571 | assert( NULL == AI ); | |
1572 | ||
1573 | to_addr.GetAddrInfo(AI, fd_table[fd].sock_family); | |
1574 | ||
1575 | x = sendto(fd, buf, len, 0, AI->ai_addr, AI->ai_addrlen); | |
1576 | ||
1577 | to_addr.FreeAddrInfo(AI); | |
1578 | ||
88bfe092 | 1579 | PROF_stop(comm_udp_sendto); |
62e76326 | 1580 | |
2d8c0b1a | 1581 | if (x >= 0) |
1582 | return x; | |
1583 | ||
17d51783 | 1584 | #ifdef _SQUID_LINUX_ |
62e76326 | 1585 | |
2d8c0b1a | 1586 | if (ECONNREFUSED != errno) |
17d51783 | 1587 | #endif |
62e76326 | 1588 | |
cc192b50 | 1589 | debugs(50, 1, "comm_udp_sendto: FD " << fd << ", (family=" << fd_table[fd].sock_family << ") " << to_addr << ": " << xstrerror()); |
62e76326 | 1590 | |
2d8c0b1a | 1591 | return COMM_ERROR; |
090089c4 | 1592 | } |
1593 | ||
b8d8561b | 1594 | void |
582b6456 | 1595 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 1596 | { |
bf8fe701 | 1597 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1598 | handler << ", data=" << data); | |
62e76326 | 1599 | |
b0469965 | 1600 | AsyncCall::Pointer call=commCbCall(5,4, "SomeCloseHandler", |
9e008dda | 1601 | CommCloseCbPtrFun(handler, data)); |
b0469965 | 1602 | comm_add_close_handler(fd, call); |
1603 | } | |
62e76326 | 1604 | |
b0469965 | 1605 | void |
1606 | comm_add_close_handler(int fd, AsyncCall::Pointer &call) | |
1607 | { | |
1608 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1609 | |
b0469965 | 1610 | /*TODO:Check for a similar scheduled AsyncCall*/ |
1611 | // for (c = fd_table[fd].closeHandler; c; c = c->next) | |
1612 | // assert(c->handler != handler || c->data != data); | |
62e76326 | 1613 | |
b0469965 | 1614 | call->setNext(fd_table[fd].closeHandler); |
62e76326 | 1615 | |
b0469965 | 1616 | fd_table[fd].closeHandler = call; |
30a4f2a8 | 1617 | } |
1618 | ||
b0469965 | 1619 | |
1620 | // remove function-based close handler | |
b8d8561b | 1621 | void |
582b6456 | 1622 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 1623 | { |
b0469965 | 1624 | assert (isOpen(fd)); |
30a4f2a8 | 1625 | /* Find handler in list */ |
bf8fe701 | 1626 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1627 | handler << ", data=" << data); | |
62e76326 | 1628 | |
b0469965 | 1629 | AsyncCall::Pointer p; |
9e008dda | 1630 | for (p = fd_table[fd].closeHandler; p != NULL; p = p->Next()) { |
b0469965 | 1631 | typedef CommCbFunPtrCallT<CommCloseCbPtrFun> Call; |
1632 | const Call *call = dynamic_cast<const Call*>(p.getRaw()); | |
1633 | if (!call) // method callbacks have their own comm_remove_close_handler | |
1634 | continue; | |
62e76326 | 1635 | |
b0469965 | 1636 | typedef CommCloseCbParams Params; |
1637 | const Params ¶ms = GetCommParams<Params>(p); | |
1638 | if (call->dialer.handler == handler && params.data == data) | |
1639 | break; /* This is our handler */ | |
1640 | } | |
7828df5b CT |
1641 | |
1642 | // comm_close removes all close handlers so our handler may be gone | |
1643 | if (p != NULL) | |
1644 | p->cancel("comm_remove_close_handler"); | |
1645 | // TODO: should we remove the handler from the close handlers list? | |
b0469965 | 1646 | } |
62e76326 | 1647 | |
b0469965 | 1648 | // remove method-based close handler |
1649 | void | |
1650 | comm_remove_close_handler(int fd, AsyncCall::Pointer &call) | |
1651 | { | |
1652 | assert (isOpen(fd)); | |
b0469965 | 1653 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", AsyncCall=" << call); |
62e76326 | 1654 | |
7828df5b CT |
1655 | // comm_close removes all close handlers so our handler may be gone |
1656 | // TODO: should we remove the handler from the close handlers list? | |
1657 | #if 0 | |
b0469965 | 1658 | // Check to see if really exist the given AsyncCall in comm_close handlers |
1659 | // TODO: optimize: this slow code is only needed for the assert() below | |
1660 | AsyncCall::Pointer p; | |
1661 | for (p = fd_table[fd].closeHandler; p != NULL && p != call; p = p->Next()); | |
1662 | assert(p == call); | |
7828df5b | 1663 | #endif |
62e76326 | 1664 | |
b0469965 | 1665 | call->cancel("comm_remove_close_handler"); |
30a4f2a8 | 1666 | } |
090089c4 | 1667 | |
b8d8561b | 1668 | static void |
1669 | commSetNoLinger(int fd) | |
30a4f2a8 | 1670 | { |
62e76326 | 1671 | |
30a4f2a8 | 1672 | struct linger L; |
090089c4 | 1673 | L.l_onoff = 0; /* off */ |
1674 | L.l_linger = 0; | |
62e76326 | 1675 | |
30a4f2a8 | 1676 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1677 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1678 | |
58a6c186 | 1679 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1680 | } |
1681 | ||
b8d8561b | 1682 | static void |
1683 | commSetReuseAddr(int fd) | |
090089c4 | 1684 | { |
1685 | int on = 1; | |
62e76326 | 1686 | |
30a4f2a8 | 1687 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1688 | debugs(50, 1, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1689 | } |
1690 | ||
b8d8561b | 1691 | static void |
1692 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1693 | { |
1694 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
bf8fe701 | 1695 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1696 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)) < 0) |
1697 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1698 | #ifdef TCP_WINDOW_CLAMP | |
1699 | if (setsockopt(fd, SOL_TCP, TCP_WINDOW_CLAMP, (char *) &size, sizeof(size)) < 0) | |
1700 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1701 | #endif | |
f868539a | 1702 | } |
1703 | ||
b8d8561b | 1704 | int |
1705 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1706 | { |
a50bfe93 | 1707 | #ifndef _SQUID_MSWIN_ |
731e4d49 | 1708 | int flags; |
9e205701 | 1709 | int dummy = 0; |
a50bfe93 | 1710 | #endif |
ec4daaa5 | 1711 | #ifdef _SQUID_WIN32_ |
62e76326 | 1712 | |
b05490a8 | 1713 | int nonblocking = TRUE; |
62e76326 | 1714 | |
629b5f75 | 1715 | #ifdef _SQUID_CYGWIN_ |
1716 | ||
7f6ffd15 | 1717 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1718 | #endif |
1719 | ||
62e76326 | 1720 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1721 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1722 | return COMM_ERROR; |
1723 | } | |
629b5f75 | 1724 | |
1725 | #ifdef _SQUID_CYGWIN_ | |
1726 | ||
7f6ffd15 | 1727 | } else { |
1728 | #endif | |
629b5f75 | 1729 | #endif |
a50bfe93 | 1730 | #ifndef _SQUID_MSWIN_ |
62e76326 | 1731 | |
1732 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1733 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1734 | return COMM_ERROR; |
1735 | } | |
1736 | ||
1737 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1738 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1739 | return COMM_ERROR; |
1740 | } | |
1741 | ||
a50bfe93 | 1742 | #endif |
629b5f75 | 1743 | #ifdef _SQUID_CYGWIN_ |
62e76326 | 1744 | |
090089c4 | 1745 | } |
62e76326 | 1746 | |
7f6ffd15 | 1747 | #endif |
58a6c186 | 1748 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1749 | |
090089c4 | 1750 | return 0; |
1751 | } | |
1752 | ||
7e3ce7b9 | 1753 | int |
1754 | commUnsetNonBlocking(int fd) | |
1755 | { | |
a50bfe93 | 1756 | #ifdef _SQUID_MSWIN_ |
1757 | int nonblocking = FALSE; | |
1758 | ||
1759 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1760 | #else | |
7e3ce7b9 | 1761 | int flags; |
1762 | int dummy = 0; | |
62e76326 | 1763 | |
7e3ce7b9 | 1764 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1765 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1766 | return COMM_ERROR; |
7e3ce7b9 | 1767 | } |
62e76326 | 1768 | |
7e3ce7b9 | 1769 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1770 | #endif |
bf8fe701 | 1771 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1772 | return COMM_ERROR; |
7e3ce7b9 | 1773 | } |
62e76326 | 1774 | |
7e3ce7b9 | 1775 | fd_table[fd].flags.nonblocking = 0; |
1776 | return 0; | |
1777 | } | |
1778 | ||
b8d8561b | 1779 | void |
e1381638 AJ |
1780 | commSetCloseOnExec(int fd) |
1781 | { | |
3ca60c86 | 1782 | #ifdef FD_CLOEXEC |
731e4d49 | 1783 | int flags; |
7a18b487 | 1784 | int dummy = 0; |
62e76326 | 1785 | |
c7989865 | 1786 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1787 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1788 | return; |
3ca60c86 | 1789 | } |
62e76326 | 1790 | |
24382924 | 1791 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1792 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1793 | |
d6827718 | 1794 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1795 | |
3ca60c86 | 1796 | #endif |
1797 | } | |
1798 | ||
e90100aa | 1799 | #ifdef TCP_NODELAY |
1800 | static void | |
e1381638 AJ |
1801 | commSetTcpNoDelay(int fd) |
1802 | { | |
e90100aa | 1803 | int on = 1; |
62e76326 | 1804 | |
e90100aa | 1805 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1806 | debugs(50, 1, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1807 | |
d6827718 | 1808 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1809 | } |
62e76326 | 1810 | |
e90100aa | 1811 | #endif |
1812 | ||
b2130d58 | 1813 | void |
e1381638 AJ |
1814 | commSetTcpKeepalive(int fd, int idle, int interval, int timeout) |
1815 | { | |
b2130d58 | 1816 | int on = 1; |
1817 | #ifdef TCP_KEEPCNT | |
1818 | if (timeout && interval) { | |
9e008dda AJ |
1819 | int count = (timeout + interval - 1) / interval; |
1820 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &count, sizeof(on)) < 0) | |
1821 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1822 | } |
1823 | #endif | |
1824 | #ifdef TCP_KEEPIDLE | |
1825 | if (idle) { | |
9e008dda AJ |
1826 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(on)) < 0) |
1827 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1828 | } |
1829 | #endif | |
1830 | #ifdef TCP_KEEPINTVL | |
1831 | if (interval) { | |
9e008dda AJ |
1832 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval, sizeof(on)) < 0) |
1833 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1834 | } |
1835 | #endif | |
1836 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) < 0) | |
9e008dda | 1837 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1838 | } |
6a988308 | 1839 | |
d86b3703 | 1840 | void |
e1381638 AJ |
1841 | comm_init(void) |
1842 | { | |
c4b7a5a9 | 1843 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1844 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1845 | |
04f55905 AJ |
1846 | /* make sure the accept() socket FIFO delay queue exists */ |
1847 | Comm::AcceptLimiter::Instance(); | |
b0469965 | 1848 | |
1849 | commfd_table = (comm_fd_t *) xcalloc(Squid_MaxFD, sizeof(comm_fd_t)); | |
2b663917 | 1850 | for (int pos = 0; pos < Squid_MaxFD; pos++) { |
9e008dda AJ |
1851 | commfd_table[pos].fd = pos; |
1852 | commfd_table[pos].readcb.fd = pos; | |
1853 | commfd_table[pos].readcb.type = IOCB_READ; | |
1854 | commfd_table[pos].writecb.fd = pos; | |
1855 | commfd_table[pos].writecb.type = IOCB_WRITE; | |
2b663917 | 1856 | } |
2d8c0b1a | 1857 | |
59c4d35b | 1858 | /* XXX account fd_table */ |
090089c4 | 1859 | /* Keep a few file descriptors free so that we don't run out of FD's |
1860 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1861 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
d85c3078 | 1862 | RESERVED_FD = min(100, Squid_MaxFD / 4); |
2d8c0b1a | 1863 | |
04eb0689 | 1864 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
74257126 AR |
1865 | |
1866 | TheHalfClosed = new DescriptorSet; | |
090089c4 | 1867 | } |
1868 | ||
236d1779 | 1869 | void |
e1381638 AJ |
1870 | comm_exit(void) |
1871 | { | |
74257126 AR |
1872 | delete TheHalfClosed; |
1873 | TheHalfClosed = NULL; | |
1874 | ||
236d1779 | 1875 | safe_free(fd_table); |
1876 | safe_free(fdd_table); | |
236d1779 | 1877 | safe_free(commfd_table); |
1878 | } | |
1879 | ||
30a4f2a8 | 1880 | /* Write to FD. */ |
b8d8561b | 1881 | static void |
e1381638 AJ |
1882 | commHandleWrite(int fd, void *data) |
1883 | { | |
2b663917 | 1884 | comm_io_callback_t *state = (comm_io_callback_t *)data; |
30a4f2a8 | 1885 | int len = 0; |
1886 | int nleft; | |
1887 | ||
2b663917 | 1888 | assert(state == COMMIO_FD_WRITECB(fd)); |
1889 | ||
88bfe092 | 1890 | PROF_start(commHandleWrite); |
bf8fe701 | 1891 | debugs(5, 5, "commHandleWrite: FD " << fd << ": off " << |
1892 | (long int) state->offset << ", sz " << (long int) state->size << "."); | |
30a4f2a8 | 1893 | |
1894 | nleft = state->size - state->offset; | |
1f7c9178 | 1895 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
bf8fe701 | 1896 | debugs(5, 5, "commHandleWrite: write() returns " << len); |
b69f7771 | 1897 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 1898 | statCounter.syscalls.sock.writes++; |
307b696e A |
1899 | // After each successful partial write, |
1900 | // reset fde::writeStart to the current time. | |
5ef5e5cc | 1901 | fd_table[fd].writeStart = squid_curtime; |
30a4f2a8 | 1902 | |
1903 | if (len == 0) { | |
62e76326 | 1904 | /* Note we even call write if nleft == 0 */ |
1905 | /* We're done */ | |
1906 | ||
1907 | if (nleft != 0) | |
bf8fe701 | 1908 | debugs(5, 1, "commHandleWrite: FD " << fd << ": write failure: connection closed with " << nleft << " bytes remaining."); |
62e76326 | 1909 | |
b0469965 | 1910 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
30a4f2a8 | 1911 | } else if (len < 0) { |
62e76326 | 1912 | /* An error */ |
1913 | ||
1914 | if (fd_table[fd].flags.socket_eof) { | |
bf8fe701 | 1915 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1916 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1917 | } else if (ignoreErrno(errno)) { |
bf8fe701 | 1918 | debugs(50, 10, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
62e76326 | 1919 | commSetSelect(fd, |
1920 | COMM_SELECT_WRITE, | |
1921 | commHandleWrite, | |
1922 | state, | |
1923 | 0); | |
1924 | } else { | |
bf8fe701 | 1925 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1926 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1927 | } |
30a4f2a8 | 1928 | } else { |
62e76326 | 1929 | /* A successful write, continue */ |
1930 | state->offset += len; | |
1931 | ||
57d55dfa | 1932 | if (state->offset < state->size) { |
62e76326 | 1933 | /* Not done, reinstall the write handler and write some more */ |
1934 | commSetSelect(fd, | |
1935 | COMM_SELECT_WRITE, | |
1936 | commHandleWrite, | |
1937 | state, | |
1938 | 0); | |
1939 | } else { | |
b0469965 | 1940 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_OK : COMM_ERROR, errno); |
62e76326 | 1941 | } |
30a4f2a8 | 1942 | } |
62e76326 | 1943 | |
88bfe092 | 1944 | PROF_stop(commHandleWrite); |
30a4f2a8 | 1945 | } |
1946 | ||
7cd8c414 | 1947 | /* |
1948 | * Queue a write. handler/handler_data are called when the write | |
1949 | * completes, on error, or on file descriptor close. | |
1950 | * | |
1951 | * free_func is used to free the passed buffer when the write has completed. | |
1952 | */ | |
b8d8561b | 1953 | void |
e1381638 AJ |
1954 | comm_write(int fd, const char *buf, int size, IOCB * handler, void *handler_data, FREE * free_func) |
1955 | { | |
b0469965 | 1956 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommWriteHander", |
9e008dda | 1957 | CommIoCbPtrFun(handler, handler_data)); |
b0469965 | 1958 | |
1959 | comm_write(fd, buf, size, call, free_func); | |
1960 | } | |
1961 | ||
1962 | void | |
e1381638 AJ |
1963 | comm_write(int fd, const char *buf, int size, AsyncCall::Pointer &callback, FREE * free_func) |
1964 | { | |
82ec8dfc | 1965 | debugs(5, 5, "comm_write: FD " << fd << ": sz " << size << ": asynCall " << callback); |
62e76326 | 1966 | |
82ec8dfc AR |
1967 | /* Make sure we are open, not closing, and not writing */ |
1968 | assert(isOpen(fd)); | |
1969 | assert(!fd_table[fd].closing()); | |
1970 | comm_io_callback_t *ccb = COMMIO_FD_WRITECB(fd); | |
1971 | assert(!ccb->active()); | |
b0469965 | 1972 | |
5ef5e5cc | 1973 | fd_table[fd].writeStart = squid_curtime; |
82ec8dfc AR |
1974 | /* Queue the write */ |
1975 | commio_set_callback(fd, IOCB_WRITE, ccb, callback, | |
9e008dda | 1976 | (char *)buf, free_func, size); |
82ec8dfc | 1977 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, ccb, 0); |
30a4f2a8 | 1978 | } |
26a880e2 | 1979 | |
b0469965 | 1980 | |
137ee196 | 1981 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 1982 | void |
e1381638 AJ |
1983 | comm_write_mbuf(int fd, MemBuf *mb, IOCB * handler, void *handler_data) |
1984 | { | |
2b663917 | 1985 | comm_write(fd, mb->buf, mb->size, handler, handler_data, mb->freeFunc()); |
cb69b4c7 | 1986 | } |
1987 | ||
b0469965 | 1988 | void |
e1381638 AJ |
1989 | comm_write_mbuf(int fd, MemBuf *mb, AsyncCall::Pointer &callback) |
1990 | { | |
b0469965 | 1991 | comm_write(fd, mb->buf, mb->size, callback, mb->freeFunc()); |
1992 | } | |
1993 | ||
c4b7a5a9 | 1994 | |
89924214 | 1995 | /* |
1996 | * hm, this might be too general-purpose for all the places we'd | |
1997 | * like to use it. | |
1998 | */ | |
b224ea98 | 1999 | int |
e1381638 AJ |
2000 | ignoreErrno(int ierrno) |
2001 | { | |
603500e7 | 2002 | switch (ierrno) { |
62e76326 | 2003 | |
89924214 | 2004 | case EINPROGRESS: |
62e76326 | 2005 | |
603500e7 | 2006 | case EWOULDBLOCK: |
26a880e2 | 2007 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 2008 | |
603500e7 | 2009 | case EAGAIN: |
26a880e2 | 2010 | #endif |
62e76326 | 2011 | |
603500e7 | 2012 | case EALREADY: |
62e76326 | 2013 | |
603500e7 | 2014 | case EINTR: |
db494ab8 | 2015 | #ifdef ERESTART |
62e76326 | 2016 | |
db494ab8 | 2017 | case ERESTART: |
2018 | #endif | |
62e76326 | 2019 | |
2020 | return 1; | |
2021 | ||
603500e7 | 2022 | default: |
62e76326 | 2023 | return 0; |
603500e7 | 2024 | } |
62e76326 | 2025 | |
603500e7 | 2026 | /* NOTREACHED */ |
26a880e2 | 2027 | } |
d723bf6b | 2028 | |
2029 | void | |
e1381638 AJ |
2030 | commCloseAllSockets(void) |
2031 | { | |
d723bf6b | 2032 | int fd; |
2033 | fde *F = NULL; | |
62e76326 | 2034 | |
d723bf6b | 2035 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2036 | F = &fd_table[fd]; |
2037 | ||
2038 | if (!F->flags.open) | |
2039 | continue; | |
2040 | ||
2041 | if (F->type != FD_SOCKET) | |
2042 | continue; | |
2043 | ||
2044 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
2045 | continue; | |
2046 | ||
b0469965 | 2047 | if (F->timeoutHandler != NULL) { |
2048 | AsyncCall::Pointer callback = F->timeoutHandler; | |
2049 | F->timeoutHandler = NULL; | |
bf8fe701 | 2050 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
9e008dda | 2051 | ScheduleCallHere(callback); |
62e76326 | 2052 | } else { |
468fe1b5 AJ |
2053 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_reset_close()"); |
2054 | comm_reset_close(fd); | |
62e76326 | 2055 | } |
d723bf6b | 2056 | } |
2057 | } | |
1b3db6d9 | 2058 | |
2d8c0b1a | 2059 | static bool |
e1381638 AJ |
2060 | AlreadyTimedOut(fde *F) |
2061 | { | |
2d8c0b1a | 2062 | if (!F->flags.open) |
2063 | return true; | |
2064 | ||
2065 | if (F->timeout == 0) | |
2066 | return true; | |
2067 | ||
2068 | if (F->timeout > squid_curtime) | |
2069 | return true; | |
2070 | ||
2071 | return false; | |
2072 | } | |
2073 | ||
5ef5e5cc AJ |
2074 | static bool |
2075 | writeTimedOut(int fd) | |
2076 | { | |
2077 | if (!commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) | |
2078 | return false; | |
2079 | ||
2080 | if ((squid_curtime - fd_table[fd].writeStart) < Config.Timeout.write) | |
2081 | return false; | |
2082 | ||
2083 | return true; | |
2084 | } | |
2085 | ||
1b3db6d9 | 2086 | void |
e1381638 AJ |
2087 | checkTimeouts(void) |
2088 | { | |
1b3db6d9 | 2089 | int fd; |
2090 | fde *F = NULL; | |
b0469965 | 2091 | AsyncCall::Pointer callback; |
62e76326 | 2092 | |
1b3db6d9 | 2093 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2094 | F = &fd_table[fd]; |
2095 | ||
5ef5e5cc AJ |
2096 | if (writeTimedOut(fd)) { |
2097 | // We have an active write callback and we are timed out | |
2098 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERROR, ETIMEDOUT); | |
307b696e | 2099 | } else if (AlreadyTimedOut(F)) |
62e76326 | 2100 | continue; |
2101 | ||
9e008dda | 2102 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 2103 | |
b0469965 | 2104 | if (F->timeoutHandler != NULL) { |
bf8fe701 | 2105 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
b0469965 | 2106 | callback = F->timeoutHandler; |
2107 | F->timeoutHandler = NULL; | |
9e008dda | 2108 | ScheduleCallHere(callback); |
62e76326 | 2109 | } else { |
bf8fe701 | 2110 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 2111 | comm_close(fd); |
2112 | } | |
b5443c04 | 2113 | } |
2114 | } | |
2115 | ||
e1381638 AJ |
2116 | void CommIO::Initialise() |
2117 | { | |
6cce2334 | 2118 | /* Initialize done pipe signal */ |
2119 | int DonePipe[2]; | |
9e008dda | 2120 | if (pipe(DonePipe)) {} |
6cce2334 | 2121 | DoneFD = DonePipe[1]; |
2122 | DoneReadFD = DonePipe[0]; | |
d06925a4 | 2123 | fd_open(DoneReadFD, FD_PIPE, "async-io completetion event: main"); |
2124 | fd_open(DoneFD, FD_PIPE, "async-io completetion event: threads"); | |
2125 | commSetNonBlocking(DoneReadFD); | |
2126 | commSetNonBlocking(DoneFD); | |
2127 | commSetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
6cce2334 | 2128 | Initialised = true; |
2129 | } | |
2130 | ||
e1381638 AJ |
2131 | void CommIO::NotifyIOClose() |
2132 | { | |
d06925a4 | 2133 | /* Close done pipe signal */ |
2134 | FlushPipe(); | |
2135 | close(DoneFD); | |
2136 | close(DoneReadFD); | |
2137 | fd_close(DoneFD); | |
2138 | fd_close(DoneReadFD); | |
2139 | Initialised = false; | |
2140 | } | |
2141 | ||
6cce2334 | 2142 | bool CommIO::Initialised = false; |
2143 | bool CommIO::DoneSignalled = false; | |
2144 | int CommIO::DoneFD = -1; | |
2145 | int CommIO::DoneReadFD = -1; | |
2146 | ||
2147 | void | |
e1381638 AJ |
2148 | CommIO::FlushPipe() |
2149 | { | |
6cce2334 | 2150 | char buf[256]; |
56410c89 | 2151 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); |
6cce2334 | 2152 | } |
2153 | ||
2154 | void | |
e1381638 AJ |
2155 | CommIO::NULLFDHandler(int fd, void *data) |
2156 | { | |
6cce2334 | 2157 | FlushPipe(); |
2158 | commSetSelect(fd, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
2159 | } | |
2160 | ||
2161 | void | |
e1381638 AJ |
2162 | CommIO::ResetNotifications() |
2163 | { | |
6cce2334 | 2164 | if (DoneSignalled) { |
62e76326 | 2165 | FlushPipe(); |
2166 | DoneSignalled = false; | |
6cce2334 | 2167 | } |
2168 | } | |
a46d2c0e | 2169 | |
9e008dda AJ |
2170 | /// Start waiting for a possibly half-closed connection to close |
2171 | // by scheduling a read callback to a monitoring handler that | |
82ec8dfc | 2172 | // will close the connection on read errors. |
a46d2c0e | 2173 | void |
e1381638 AJ |
2174 | commStartHalfClosedMonitor(int fd) |
2175 | { | |
74257126 | 2176 | debugs(5, 5, HERE << "adding FD " << fd << " to " << *TheHalfClosed); |
82ec8dfc AR |
2177 | assert(isOpen(fd)); |
2178 | assert(!commHasHalfClosedMonitor(fd)); | |
74257126 AR |
2179 | (void)TheHalfClosed->add(fd); // could also assert the result |
2180 | commPlanHalfClosedCheck(); // may schedule check if we added the first FD | |
2181 | } | |
2182 | ||
2183 | static | |
2184 | void | |
e1381638 AJ |
2185 | commPlanHalfClosedCheck() |
2186 | { | |
74257126 AR |
2187 | if (!WillCheckHalfClosed && !TheHalfClosed->empty()) { |
2188 | eventAdd("commHalfClosedCheck", &commHalfClosedCheck, NULL, 1.0, 1); | |
2189 | WillCheckHalfClosed = true; | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | /// iterates over all descriptors that may need half-closed tests and | |
2194 | /// calls comm_read for those that do; re-schedules the check if needed | |
2195 | static | |
2196 | void | |
e1381638 AJ |
2197 | commHalfClosedCheck(void *) |
2198 | { | |
74257126 AR |
2199 | debugs(5, 5, HERE << "checking " << *TheHalfClosed); |
2200 | ||
2201 | typedef DescriptorSet::const_iterator DSCI; | |
2202 | const DSCI end = TheHalfClosed->end(); | |
2203 | for (DSCI i = TheHalfClosed->begin(); i != end; ++i) { | |
2204 | const int fd = *i; | |
2205 | if (!fd_table[fd].halfClosedReader) { // not reading already | |
2206 | AsyncCall::Pointer call = commCbCall(5,4, "commHalfClosedReader", | |
9e008dda | 2207 | CommIoCbPtrFun(&commHalfClosedReader, NULL)); |
74257126 AR |
2208 | comm_read(fd, NULL, 0, call); |
2209 | fd_table[fd].halfClosedReader = call; | |
2210 | } | |
2211 | } | |
f900210a | 2212 | |
74257126 AR |
2213 | WillCheckHalfClosed = false; // as far as we know |
2214 | commPlanHalfClosedCheck(); // may need to check again | |
f900210a | 2215 | } |
2216 | ||
82ec8dfc AR |
2217 | /// checks whether we are waiting for possibly half-closed connection to close |
2218 | // We are monitoring if the read handler for the fd is the monitoring handler. | |
2219 | bool | |
e1381638 AJ |
2220 | commHasHalfClosedMonitor(int fd) |
2221 | { | |
74257126 | 2222 | return TheHalfClosed->has(fd); |
a46d2c0e | 2223 | } |
2224 | ||
82ec8dfc AR |
2225 | /// stop waiting for possibly half-closed connection to close |
2226 | static void | |
e1381638 AJ |
2227 | commStopHalfClosedMonitor(int const fd) |
2228 | { | |
74257126 AR |
2229 | debugs(5, 5, HERE << "removing FD " << fd << " from " << *TheHalfClosed); |
2230 | ||
2231 | // cancel the read if one was scheduled | |
2232 | AsyncCall::Pointer reader = fd_table[fd].halfClosedReader; | |
2233 | if (reader != NULL) | |
2234 | comm_read_cancel(fd, reader); | |
2235 | fd_table[fd].halfClosedReader = NULL; | |
2236 | ||
2237 | TheHalfClosed->del(fd); | |
a46d2c0e | 2238 | } |
2239 | ||
82ec8dfc AR |
2240 | /// I/O handler for the possibly half-closed connection monitoring code |
2241 | static void | |
e1381638 AJ |
2242 | commHalfClosedReader(int fd, char *, size_t size, comm_err_t flag, int, void *) |
2243 | { | |
82ec8dfc | 2244 | // there cannot be more data coming in on half-closed connections |
9e008dda | 2245 | assert(size == 0); |
74257126 AR |
2246 | assert(commHasHalfClosedMonitor(fd)); // or we would have canceled the read |
2247 | ||
2248 | fd_table[fd].halfClosedReader = NULL; // done reading, for now | |
a46d2c0e | 2249 | |
82ec8dfc AR |
2250 | // nothing to do if fd is being closed |
2251 | if (flag == COMM_ERR_CLOSING) | |
2252 | return; | |
a46d2c0e | 2253 | |
82ec8dfc AR |
2254 | // if read failed, close the connection |
2255 | if (flag != COMM_OK) { | |
2256 | debugs(5, 3, "commHalfClosedReader: closing FD " << fd); | |
2257 | comm_close(fd); | |
2258 | return; | |
2259 | } | |
a46d2c0e | 2260 | |
82ec8dfc | 2261 | // continue waiting for close or error |
74257126 | 2262 | commPlanHalfClosedCheck(); // make sure this fd will be checked again |
a46d2c0e | 2263 | } |
2264 | ||
a46d2c0e | 2265 | |
b0469965 | 2266 | CommRead::CommRead() : fd(-1), buf(NULL), len(0), callback(NULL) {} |
a46d2c0e | 2267 | |
b0469965 | 2268 | CommRead::CommRead(int fd_, char *buf_, int len_, AsyncCall::Pointer &callback_) |
2269 | : fd(fd_), buf(buf_), len(len_), callback(callback_) {} | |
a46d2c0e | 2270 | |
a50bfe93 | 2271 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 2272 | |
a50bfe93 | 2273 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 2274 | |
e1381638 AJ |
2275 | DeferredReadManager::~DeferredReadManager() |
2276 | { | |
a46d2c0e | 2277 | flushReads(); |
2278 | assert (deferredReads.empty()); | |
2279 | } | |
2280 | ||
97427e90 | 2281 | /* explicit instantiation required for some systems */ |
2282 | ||
63be0a78 | 2283 | /// \cond AUTODOCS-IGNORE |
2236466c | 2284 | template cbdata_type CbDataList<DeferredRead>::CBDATA_CbDataList; |
63be0a78 | 2285 | /// \endcond |
97427e90 | 2286 | |
a46d2c0e | 2287 | void |
e1381638 AJ |
2288 | DeferredReadManager::delayRead(DeferredRead const &aRead) |
2289 | { | |
bf8fe701 | 2290 | debugs(5, 3, "Adding deferred read on FD " << aRead.theRead.fd); |
2236466c | 2291 | CbDataList<DeferredRead> *temp = deferredReads.push_back(aRead); |
2796c0d7 | 2292 | |
9e008dda | 2293 | // We have to use a global function as a closer and point to temp |
2796c0d7 AR |
2294 | // instead of "this" because DeferredReadManager is not a job and |
2295 | // is not even cbdata protected | |
2296 | AsyncCall::Pointer closer = commCbCall(5,4, | |
9e008dda AJ |
2297 | "DeferredReadManager::CloseHandler", |
2298 | CommCloseCbPtrFun(&CloseHandler, temp)); | |
2796c0d7 AR |
2299 | comm_add_close_handler(aRead.theRead.fd, closer); |
2300 | temp->element.closer = closer; // remeber so that we can cancel | |
a46d2c0e | 2301 | } |
2302 | ||
2303 | void | |
e1381638 AJ |
2304 | DeferredReadManager::CloseHandler(int fd, void *thecbdata) |
2305 | { | |
a46d2c0e | 2306 | if (!cbdataReferenceValid (thecbdata)) |
2307 | return; | |
2308 | ||
2236466c | 2309 | CbDataList<DeferredRead> *temp = (CbDataList<DeferredRead> *)thecbdata; |
a46d2c0e | 2310 | |
2796c0d7 | 2311 | temp->element.closer = NULL; |
a46d2c0e | 2312 | temp->element.markCancelled(); |
2313 | } | |
2314 | ||
2315 | DeferredRead | |
e1381638 AJ |
2316 | DeferredReadManager::popHead(CbDataListContainer<DeferredRead> &deferredReads) |
2317 | { | |
a46d2c0e | 2318 | assert (!deferredReads.empty()); |
2319 | ||
2796c0d7 AR |
2320 | DeferredRead &read = deferredReads.head->element; |
2321 | if (!read.cancelled) { | |
2322 | comm_remove_close_handler(read.theRead.fd, read.closer); | |
2323 | read.closer = NULL; | |
2324 | } | |
a46d2c0e | 2325 | |
2326 | DeferredRead result = deferredReads.pop_front(); | |
2327 | ||
2328 | return result; | |
2329 | } | |
2330 | ||
2331 | void | |
e1381638 AJ |
2332 | DeferredReadManager::kickReads(int const count) |
2333 | { | |
2236466c | 2334 | /* if we had CbDataList::size() we could consolidate this and flushReads */ |
a46d2c0e | 2335 | |
33cea91c | 2336 | if (count < 1) { |
a46d2c0e | 2337 | flushReads(); |
33cea91c | 2338 | return; |
2339 | } | |
a46d2c0e | 2340 | |
2341 | size_t remaining = count; | |
2342 | ||
2343 | while (!deferredReads.empty() && remaining) { | |
2344 | DeferredRead aRead = popHead(deferredReads); | |
2345 | kickARead(aRead); | |
2346 | ||
2347 | if (!aRead.cancelled) | |
2348 | --remaining; | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | void | |
e1381638 AJ |
2353 | DeferredReadManager::flushReads() |
2354 | { | |
2236466c | 2355 | CbDataListContainer<DeferredRead> reads; |
a46d2c0e | 2356 | reads = deferredReads; |
2236466c | 2357 | deferredReads = CbDataListContainer<DeferredRead>(); |
a46d2c0e | 2358 | |
27b24462 | 2359 | // XXX: For fairness this SHOULD randomize the order |
a46d2c0e | 2360 | while (!reads.empty()) { |
2361 | DeferredRead aRead = popHead(reads); | |
2362 | kickARead(aRead); | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | void | |
e1381638 AJ |
2367 | DeferredReadManager::kickARead(DeferredRead const &aRead) |
2368 | { | |
a46d2c0e | 2369 | if (aRead.cancelled) |
2370 | return; | |
2371 | ||
af6a12ee AJ |
2372 | if (aRead.theRead.fd>=0 && fd_table[aRead.theRead.fd].closing()) |
2373 | return; | |
ed2c738b | 2374 | |
bf8fe701 | 2375 | debugs(5, 3, "Kicking deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2376 | |
2377 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2378 | } | |
2379 | ||
2380 | void | |
e1381638 AJ |
2381 | DeferredRead::markCancelled() |
2382 | { | |
a46d2c0e | 2383 | cancelled = true; |
2384 | } | |
2d8c0b1a | 2385 | |
e1381638 AJ |
2386 | ConnectionDetail::ConnectionDetail() : me(), peer() |
2387 | { | |
2d8c0b1a | 2388 | } |
8ff3fa2e | 2389 | |
8ff3fa2e | 2390 | int |
e1381638 AJ |
2391 | CommSelectEngine::checkEvents(int timeout) |
2392 | { | |
fa3f745b | 2393 | static time_t last_timeout = 0; |
2394 | ||
2395 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2396 | if (squid_curtime > last_timeout) { | |
2397 | last_timeout = squid_curtime; | |
2398 | checkTimeouts(); | |
2399 | } | |
2400 | ||
8ff3fa2e | 2401 | switch (comm_select(timeout)) { |
2402 | ||
2403 | case COMM_OK: | |
2404 | ||
2405 | case COMM_TIMEOUT: | |
2406 | return 0; | |
2407 | ||
2408 | case COMM_IDLE: | |
2409 | ||
2410 | case COMM_SHUTDOWN: | |
2411 | return EVENT_IDLE; | |
2412 | ||
2413 | case COMM_ERROR: | |
2414 | return EVENT_ERROR; | |
2415 | ||
2416 | default: | |
2417 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2418 | return EVENT_ERROR; | |
2419 | }; | |
2420 | } |