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cc192b50 | 1 | |
30a4f2a8 | 2 | /* |
63be0a78 | 3 | * $Id: comm.cc,v 1.447 2008/02/26 21:49:34 amosjeffries Exp $ |
30a4f2a8 | 4 | * |
5 | * DEBUG: section 5 Socket Functions | |
6 | * AUTHOR: Harvest Derived | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
30a4f2a8 | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
2d8c0b1a | 34 | * |
35 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
30a4f2a8 | 36 | */ |
090089c4 | 37 | |
44a47c6e | 38 | #include "squid.h" |
c4b7a5a9 | 39 | #include "StoreIOBuffer.h" |
40 | #include "comm.h" | |
a553a5a3 | 41 | #include "event.h" |
528b2c61 | 42 | #include "fde.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" |
cc192b50 | 50 | #include "IPAddress.h" |
3949d8b7 | 51 | #include "IPInterception.h" |
090089c4 | 52 | |
b671cc68 | 53 | #if defined(_SQUID_CYGWIN_) |
54 | #include <sys/ioctl.h> | |
55 | #endif | |
30a4f2a8 | 56 | #ifdef HAVE_NETINET_TCP_H |
57 | #include <netinet/tcp.h> | |
58 | #endif | |
090089c4 | 59 | |
2b663917 | 60 | /* |
61 | * New C-like simple comm code. This stuff is a mess and doesn't really buy us anything. | |
62 | */ | |
63 | ||
64 | typedef enum { | |
65 | IOCB_NONE, | |
66 | IOCB_READ, | |
67 | IOCB_WRITE | |
68 | } iocb_type; | |
69 | ||
82ec8dfc AR |
70 | static void commStopHalfClosedMonitor(int fd); |
71 | static IOCB commHalfClosedReader; | |
72 | ||
73 | ||
b0469965 | 74 | struct comm_io_callback_t { |
2b663917 | 75 | iocb_type type; |
76 | int fd; | |
b0469965 | 77 | AsyncCall::Pointer callback; |
2b663917 | 78 | char *buf; |
79 | FREE *freefunc; | |
80 | int size; | |
81 | int offset; | |
2b663917 | 82 | comm_err_t errcode; |
83 | int xerrno; | |
b0469965 | 84 | |
85 | bool active() const { return callback != NULL; } | |
2b663917 | 86 | }; |
2b663917 | 87 | |
88 | struct _comm_fd { | |
89 | int fd; | |
90 | comm_io_callback_t readcb; | |
91 | comm_io_callback_t writecb; | |
92 | }; | |
93 | typedef struct _comm_fd comm_fd_t; | |
94 | comm_fd_t *commfd_table; | |
95 | ||
b0469965 | 96 | // TODO: make this a comm_io_callback_t method? |
2b663917 | 97 | bool |
98 | commio_has_callback(int fd, iocb_type type, comm_io_callback_t *ccb) | |
99 | { | |
100 | assert(ccb->fd == fd); | |
101 | assert(ccb->type == type); | |
b0469965 | 102 | return ccb->active(); |
2b663917 | 103 | } |
104 | ||
105 | /* | |
b0469965 | 106 | * Configure comm_io_callback_t for I/O |
2b663917 | 107 | * |
108 | * @param fd filedescriptor | |
109 | * @param ccb comm io callback | |
110 | * @param cb callback | |
111 | * @param cbdata callback data (must be cbdata'ed) | |
112 | * @param buf buffer, if applicable | |
113 | * @param freefunc freefunc, if applicable | |
114 | * @param size buffer size | |
115 | */ | |
b0469965 | 116 | static void |
117 | commio_set_callback(int fd, iocb_type type, comm_io_callback_t *ccb, | |
118 | AsyncCall::Pointer &cb, char *buf, FREE *freefunc, int size) | |
2b663917 | 119 | { |
b0469965 | 120 | assert(!ccb->active()); |
2b663917 | 121 | assert(ccb->type == type); |
b0469965 | 122 | assert(cb != NULL); |
2b663917 | 123 | ccb->fd = fd; |
124 | ccb->callback = cb; | |
2b663917 | 125 | ccb->buf = buf; |
126 | ccb->freefunc = freefunc; | |
127 | ccb->size = size; | |
2b663917 | 128 | ccb->offset = 0; |
129 | } | |
130 | ||
131 | ||
b0469965 | 132 | // Schedule the callback call and clear the callback |
133 | static void | |
134 | commio_finish_callback(int fd, comm_io_callback_t *ccb, comm_err_t code, int xerrno) | |
2b663917 | 135 | { |
b0469965 | 136 | debugs(5, 3, "commio_finish_callback: called for FD " << fd << " (" << |
137 | code << ", " << xerrno << ")"); | |
138 | assert(ccb->active()); | |
2b663917 | 139 | assert(ccb->fd == fd); |
140 | ccb->errcode = code; | |
141 | ccb->xerrno = xerrno; | |
b0469965 | 142 | |
143 | comm_io_callback_t cb = *ccb; | |
144 | ||
145 | /* We've got a copy; blow away the real one */ | |
146 | /* XXX duplicate code from commio_cancel_callback! */ | |
147 | ccb->xerrno = 0; | |
148 | ccb->callback = NULL; // cb has it | |
149 | ||
150 | /* free data */ | |
151 | if (cb.freefunc) { | |
152 | cb.freefunc(cb.buf); | |
153 | cb.buf = NULL; | |
154 | } | |
155 | ||
156 | if (cb.callback != NULL) { | |
157 | typedef CommIoCbParams Params; | |
158 | Params ¶ms = GetCommParams<Params>(cb.callback); | |
159 | params.fd = cb.fd; | |
160 | params.buf = cb.buf; | |
161 | params.size = cb.offset; | |
162 | params.flag = cb.errcode; | |
163 | params.xerrno = cb.xerrno; | |
164 | ScheduleCallHere(cb.callback); | |
165 | } | |
2b663917 | 166 | } |
167 | ||
168 | ||
169 | /* | |
170 | * Cancel the given callback | |
171 | * | |
172 | * Remember that the data is cbdataRef'ed. | |
173 | */ | |
b0469965 | 174 | // TODO: make this a comm_io_callback_t method |
175 | static void | |
2b663917 | 176 | commio_cancel_callback(int fd, comm_io_callback_t *ccb) |
177 | { | |
b0469965 | 178 | debugs(5, 3, "commio_cancel_callback: called for FD " << fd); |
2b663917 | 179 | assert(ccb->fd == fd); |
b0469965 | 180 | assert(ccb->active()); |
2b663917 | 181 | |
182 | ccb->xerrno = 0; | |
2b663917 | 183 | ccb->callback = NULL; |
2b663917 | 184 | } |
185 | ||
186 | /* | |
187 | * Call the given comm callback; assumes the callback is valid. | |
188 | * | |
189 | * @param ccb io completion callback | |
190 | */ | |
191 | void | |
192 | commio_call_callback(comm_io_callback_t *ccb) | |
193 | { | |
2b663917 | 194 | } |
195 | ||
2d8c0b1a | 196 | class ConnectStateData |
62e76326 | 197 | { |
2d8c0b1a | 198 | |
199 | public: | |
d2d59a68 | 200 | void *operator new (size_t); |
201 | void operator delete (void *); | |
2d8c0b1a | 202 | static void Connect (int fd, void *me); |
203 | void connect(); | |
204 | void callCallback(comm_err_t status, int xerrno); | |
205 | void defaults(); | |
cc192b50 | 206 | |
207 | // defaults given by client | |
f88211e8 | 208 | char *host; |
cc192b50 | 209 | u_short default_port; |
210 | IPAddress default_addr; | |
211 | // NP: CANNOT store the default addr:port together as it gets set/reset differently. | |
62e76326 | 212 | |
cc192b50 | 213 | IPAddress S; |
b0469965 | 214 | AsyncCall::Pointer callback; |
62e76326 | 215 | |
03a1ee42 | 216 | int fd; |
22c653cd | 217 | int tries; |
218 | int addrcount; | |
219 | int connstart; | |
d2d59a68 | 220 | |
221 | private: | |
0b77ecd8 | 222 | int commResetFD(); |
223 | int commRetryConnect(); | |
d2d59a68 | 224 | CBDATA_CLASS(ConnectStateData); |
2d8c0b1a | 225 | }; |
f88211e8 | 226 | |
090089c4 | 227 | /* STATIC */ |
62e76326 | 228 | |
cc192b50 | 229 | static comm_err_t commBind(int s, struct addrinfo &); |
f5b8bbc4 | 230 | static void commSetReuseAddr(int); |
231 | static void commSetNoLinger(int); | |
30a4f2a8 | 232 | #ifdef TCP_NODELAY |
f5b8bbc4 | 233 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 234 | #endif |
f5b8bbc4 | 235 | static void commSetTcpRcvbuf(int, int); |
f88211e8 | 236 | static PF commConnectFree; |
03a1ee42 | 237 | static PF commHandleWrite; |
edeb28fd | 238 | static IPH commConnectDnsHandle; |
723123a9 | 239 | |
3c1a197f | 240 | static PF comm_accept_try; |
c4b7a5a9 | 241 | |
62e76326 | 242 | class AcceptFD |
243 | { | |
244 | ||
245 | public: | |
b0469965 | 246 | AcceptFD(int aFd = -1): fd(aFd), theCallback(0), mayAcceptMore(false) {} |
62e76326 | 247 | |
b0469965 | 248 | void subscribe(AsyncCall::Pointer &call); |
249 | void acceptNext(); | |
250 | void notify(int newfd, comm_err_t, int xerrno, const ConnectionDetail &); | |
62e76326 | 251 | |
2d8c0b1a | 252 | int fd; |
545d554b | 253 | |
b0469965 | 254 | private: |
255 | bool acceptOne(); | |
62e76326 | 256 | |
b0469965 | 257 | AsyncCall::Pointer theCallback; |
258 | bool mayAcceptMore; | |
c4b7a5a9 | 259 | }; |
62e76326 | 260 | |
c4b7a5a9 | 261 | typedef enum { |
62e76326 | 262 | COMM_CB_READ = 1, |
2d8c0b1a | 263 | COMM_CB_DERIVED, |
c4b7a5a9 | 264 | } comm_callback_t; |
265 | ||
62e76326 | 266 | struct _fd_debug_t |
267 | { | |
43ae1d95 | 268 | char const *close_file; |
62e76326 | 269 | int close_line; |
c4b7a5a9 | 270 | }; |
62e76326 | 271 | |
c4b7a5a9 | 272 | typedef struct _fd_debug_t fd_debug_t; |
273 | ||
b001e822 | 274 | static MemAllocator *conn_close_pool = NULL; |
b0469965 | 275 | AcceptFD *fdc_table = NULL; // TODO: rename. And use Vector<>? |
c4b7a5a9 | 276 | fd_debug_t *fdd_table = NULL; |
62e76326 | 277 | |
b0469965 | 278 | static bool |
279 | isOpen(const int fd) | |
b300c36d | 280 | { |
b0469965 | 281 | return fd_table[fd].flags.open != 0; |
b300c36d | 282 | } |
283 | ||
e1a88700 | 284 | /** |
c4b7a5a9 | 285 | * Attempt a read |
286 | * | |
287 | * If the read attempt succeeds or fails, call the callback. | |
288 | * Else, wait for another IO notification. | |
289 | */ | |
2d8c0b1a | 290 | void |
2b663917 | 291 | commHandleRead(int fd, void *data) |
2d8c0b1a | 292 | { |
2b663917 | 293 | comm_io_callback_t *ccb = (comm_io_callback_t *) data; |
294 | ||
295 | assert(data == COMMIO_FD_READCB(fd)); | |
296 | assert(commio_has_callback(fd, IOCB_READ, ccb)); | |
62e76326 | 297 | /* Attempt a read */ |
298 | statCounter.syscalls.sock.reads++; | |
299 | errno = 0; | |
2d8c0b1a | 300 | int retval; |
2b663917 | 301 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 302 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 303 | |
304 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 305 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
2b663917 | 306 | ccb->offset = 0; |
b0469965 | 307 | commio_finish_callback(fd, ccb, COMM_ERROR, errno); |
62e76326 | 308 | return; |
309 | }; | |
310 | ||
311 | /* See if we read anything */ | |
312 | /* Note - read 0 == socket EOF, which is a valid read */ | |
313 | if (retval >= 0) { | |
314 | fd_bytes(fd, retval, FD_READ); | |
b0469965 | 315 | ccb->offset = retval; |
316 | commio_finish_callback(fd, ccb, COMM_OK, errno); | |
62e76326 | 317 | return; |
318 | } | |
c4b7a5a9 | 319 | |
62e76326 | 320 | /* Nope, register for some more IO */ |
2b663917 | 321 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 322 | } |
323 | ||
e1a88700 | 324 | /** |
c4b7a5a9 | 325 | * Queue a read. handler/handler_data are called when the read |
326 | * completes, on error, or on file descriptor close. | |
327 | */ | |
328 | void | |
329 | comm_read(int fd, char *buf, int size, IOCB *handler, void *handler_data) | |
b0469965 | 330 | { |
331 | AsyncCall::Pointer call = commCbCall(5,4, "SomeCommReadHandler", | |
332 | CommIoCbPtrFun(handler, handler_data)); | |
333 | comm_read(fd, buf, size, call); | |
334 | } | |
335 | ||
336 | void | |
337 | comm_read(int fd, char *buf, int size, AsyncCall::Pointer &callback) | |
c4b7a5a9 | 338 | { |
82ec8dfc | 339 | debugs(5, 5, "comm_read, queueing read for FD " << fd << "; asynCall " << callback); |
c4b7a5a9 | 340 | |
82ec8dfc AR |
341 | /* Make sure we are open and not closing */ |
342 | assert(isOpen(fd)); | |
343 | assert(!fd_table[fd].closing()); | |
344 | comm_io_callback_t *ccb = COMMIO_FD_READCB(fd); | |
345 | ||
346 | // Make sure we are either not reading or just passively monitoring. | |
347 | // Active/passive conflicts are OK and simply cancel passive monitoring. | |
348 | if (ccb->active()) { | |
349 | // if the assertion below fails, we have an active comm_read conflict | |
350 | assert(commHasHalfClosedMonitor(fd)); | |
351 | commStopHalfClosedMonitor(fd); | |
352 | assert(!ccb->active()); | |
353 | } | |
528b2c61 | 354 | |
2b663917 | 355 | /* Queue the read */ |
82ec8dfc AR |
356 | commio_set_callback(fd, IOCB_READ, ccb, callback, (char *)buf, NULL, size); |
357 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, ccb, 0); | |
c4b7a5a9 | 358 | } |
359 | ||
e1a88700 | 360 | /** |
c4b7a5a9 | 361 | * Empty the read buffers |
362 | * | |
363 | * This is a magical routine that empties the read buffers. | |
364 | * Under some platforms (Linux) if a buffer has data in it before | |
365 | * you call close(), the socket will hang and take quite a while | |
366 | * to timeout. | |
367 | */ | |
368 | static void | |
369 | comm_empty_os_read_buffers(int fd) | |
370 | { | |
a42d5c25 | 371 | #ifdef _SQUID_LINUX_ |
c4b7a5a9 | 372 | /* prevent those nasty RST packets */ |
373 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 374 | |
cc192b50 | 375 | if (fd_table[fd].flags.nonblocking == 1) { |
376 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) {}; | |
377 | } | |
c4b7a5a9 | 378 | #endif |
379 | } | |
380 | ||
381 | ||
e1a88700 | 382 | /** |
2b663917 | 383 | * Return whether the FD has a pending completed callback. |
c4b7a5a9 | 384 | */ |
385 | int | |
386 | comm_has_pending_read_callback(int fd) | |
387 | { | |
b0469965 | 388 | assert(isOpen(fd)); |
389 | // XXX: We do not know whether there is a read callback scheduled. | |
390 | // This is used for pconn management that should probably be more | |
391 | // tightly integrated into comm to minimize the chance that a | |
392 | // closing pconn socket will be used for a new transaction. | |
545d554b | 393 | return false; |
c4b7a5a9 | 394 | } |
395 | ||
b0469965 | 396 | // Does comm check this fd for read readiness? |
397 | // Note that when comm is not monitoring, there can be a pending callback | |
398 | // call, which may resume comm monitoring once fired. | |
528b2c61 | 399 | bool |
b0469965 | 400 | comm_monitors_read(int fd) |
c4b7a5a9 | 401 | { |
b0469965 | 402 | assert(isOpen(fd)); |
403 | // Being active is usually the same as monitoring because we always | |
404 | // start monitoring the FD when we configure comm_io_callback_t for I/O | |
405 | // and we usually configure comm_io_callback_t for I/O when we starting | |
406 | // monitoring a FD for reading. TODO: replace with commio_has_callback | |
407 | return COMMIO_FD_READCB(fd)->active(); | |
c4b7a5a9 | 408 | } |
409 | ||
e1a88700 | 410 | /** |
c4b7a5a9 | 411 | * Cancel a pending read. Assert that we have the right parameters, |
412 | * and that there are no pending read events! | |
2b663917 | 413 | * |
b0469965 | 414 | * XXX: We do not assert that there are no pending read events and |
415 | * with async calls it becomes even more difficult. | |
416 | * The whole interface should be reworked to do callback->cancel() | |
417 | * instead of searching for places where the callback may be stored and | |
418 | * updating the state of those places. | |
419 | * | |
2b663917 | 420 | * AHC Don't call the comm handlers? |
c4b7a5a9 | 421 | */ |
422 | void | |
423 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
424 | { | |
b0469965 | 425 | if (!isOpen(fd)) { |
426 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
427 | return; | |
428 | } | |
429 | ||
430 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
431 | // TODO: is "active" == "monitors FD"? | |
432 | if (!cb->active()) { | |
433 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
434 | return; | |
435 | } | |
436 | ||
437 | typedef CommCbFunPtrCallT<CommIoCbPtrFun> Call; | |
438 | Call *call = dynamic_cast<Call*>(cb->callback.getRaw()); | |
439 | if (!call) { | |
440 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " lacks callback"); | |
441 | return; | |
442 | } | |
443 | ||
82ec8dfc AR |
444 | call->cancel("old comm_read_cancel"); |
445 | ||
b0469965 | 446 | typedef CommIoCbParams Params; |
447 | const Params ¶ms = GetCommParams<Params>(cb->callback); | |
c4b7a5a9 | 448 | |
c4b7a5a9 | 449 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
b0469965 | 450 | assert(call->dialer.handler == callback); |
451 | assert(params.data == data); | |
c4b7a5a9 | 452 | |
453 | /* Delete the callback */ | |
b0469965 | 454 | commio_cancel_callback(fd, cb); |
420f2ac8 | 455 | |
456 | /* And the IO event */ | |
62e76326 | 457 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 458 | } |
459 | ||
c4b7a5a9 | 460 | void |
b0469965 | 461 | comm_read_cancel(int fd, AsyncCall::Pointer &callback) |
c4b7a5a9 | 462 | { |
b0469965 | 463 | callback->cancel("comm_read_cancel"); |
464 | ||
465 | if (!isOpen(fd)) { | |
466 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
467 | return; | |
468 | } | |
469 | ||
470 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
471 | ||
472 | if (!cb->active()) { | |
473 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
474 | return; | |
475 | } | |
476 | ||
477 | AsyncCall::Pointer call = cb->callback; | |
82ec8dfc | 478 | assert(call != NULL); // XXX: should never fail (active() checks for callback==NULL) |
b0469965 | 479 | |
480 | /* Ok, we can be reasonably sure we won't lose any data here! */ | |
481 | assert(call == callback); | |
c4b7a5a9 | 482 | |
b0469965 | 483 | /* Delete the callback */ |
484 | commio_cancel_callback(fd, cb); | |
485 | ||
486 | /* And the IO event */ | |
487 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); | |
c4b7a5a9 | 488 | } |
489 | ||
490 | ||
e1a88700 | 491 | /** |
ce767c23 | 492 | * synchronous wrapper around udp socket functions |
493 | */ | |
ce767c23 | 494 | int |
cc192b50 | 495 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, IPAddress &from) |
ce767c23 | 496 | { |
62e76326 | 497 | statCounter.syscalls.sock.recvfroms++; |
cc192b50 | 498 | int x = 0; |
499 | struct addrinfo *AI = NULL; | |
500 | ||
501 | debugs(5,8, "comm_udp_recvfrom: FD " << fd << " from " << from); | |
502 | ||
503 | assert( NULL == AI ); | |
504 | ||
505 | from.InitAddrInfo(AI); | |
506 | ||
507 | x = recvfrom(fd, buf, len, flags, AI->ai_addr, &AI->ai_addrlen); | |
508 | ||
509 | from = *AI; | |
510 | ||
511 | from.FreeAddrInfo(AI); | |
512 | ||
513 | return x; | |
ce767c23 | 514 | } |
515 | ||
365f12a9 | 516 | int |
7d21986b | 517 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 518 | { |
cc192b50 | 519 | IPAddress nul; |
520 | return comm_udp_recvfrom(fd, buf, len, flags, nul); | |
365f12a9 | 521 | } |
522 | ||
f71da12c | 523 | ssize_t |
7d21986b | 524 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 525 | { |
62e76326 | 526 | return send(s, buf, len, flags); |
f71da12c | 527 | } |
ce767c23 | 528 | |
529 | ||
545d554b | 530 | bool |
531 | comm_has_incomplete_write(int fd) | |
532 | { | |
b0469965 | 533 | assert(isOpen(fd)); |
534 | return COMMIO_FD_WRITECB(fd)->active(); | |
d4cb310b | 535 | } |
536 | ||
e1a88700 | 537 | /** |
cf3c0ee3 | 538 | * Queue a write. handler/handler_data are called when the write fully |
539 | * completes, on error, or on file descriptor close. | |
540 | */ | |
9864ee44 | 541 | |
090089c4 | 542 | /* Return the local port associated with fd. */ |
b8d8561b | 543 | u_short |
544 | comm_local_port(int fd) | |
090089c4 | 545 | { |
cc192b50 | 546 | IPAddress temp; |
547 | struct addrinfo *addr = NULL; | |
76f87348 | 548 | fde *F = &fd_table[fd]; |
090089c4 | 549 | |
090089c4 | 550 | /* If the fd is closed already, just return */ |
62e76326 | 551 | |
60c0b5a2 | 552 | if (!F->flags.open) { |
bf8fe701 | 553 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 554 | return 0; |
090089c4 | 555 | } |
62e76326 | 556 | |
cc192b50 | 557 | if (F->local_addr.GetPort()) |
558 | return F->local_addr.GetPort(); | |
62e76326 | 559 | |
cc192b50 | 560 | temp.InitAddrInfo(addr); |
62e76326 | 561 | |
cc192b50 | 562 | if (getsockname(fd, addr->ai_addr, &(addr->ai_addrlen)) ) { |
bf8fe701 | 563 | debugs(50, 1, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
cc192b50 | 564 | temp.FreeAddrInfo(addr); |
62e76326 | 565 | return 0; |
090089c4 | 566 | } |
cc192b50 | 567 | temp = *addr; |
568 | ||
569 | temp.FreeAddrInfo(addr); | |
570 | ||
571 | F->local_addr.SetPort(temp.GetPort()); | |
572 | ||
573 | // grab default socket information for this address | |
574 | temp.GetAddrInfo(addr); | |
575 | ||
576 | F->sock_family = addr->ai_family; | |
577 | ||
578 | temp.FreeAddrInfo(addr); | |
62e76326 | 579 | |
cc192b50 | 580 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_addr.GetPort()); |
581 | return F->local_addr.GetPort(); | |
090089c4 | 582 | } |
583 | ||
3d7e9d7c | 584 | static comm_err_t |
cc192b50 | 585 | commBind(int s, struct addrinfo &inaddr) |
090089c4 | 586 | { |
83704487 | 587 | statCounter.syscalls.sock.binds++; |
62e76326 | 588 | |
cc192b50 | 589 | if (bind(s, inaddr.ai_addr, inaddr.ai_addrlen) == 0) |
62e76326 | 590 | return COMM_OK; |
591 | ||
cc192b50 | 592 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << fd_table[s].local_addr << ": " << xstrerror()); |
62e76326 | 593 | |
090089c4 | 594 | return COMM_ERROR; |
595 | } | |
596 | ||
e1a88700 | 597 | /** |
598 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
599 | * is OR of flags specified in comm.h. Defaults TOS | |
600 | */ | |
b8d8561b | 601 | int |
16b204c4 | 602 | comm_open(int sock_type, |
62e76326 | 603 | int proto, |
cc192b50 | 604 | IPAddress &addr, |
62e76326 | 605 | int flags, |
606 | const char *note) | |
d6827718 | 607 | { |
cc192b50 | 608 | return comm_openex(sock_type, proto, addr, flags, 0, note); |
d6827718 | 609 | } |
610 | ||
2d8c0b1a | 611 | static bool |
612 | limitError(int const anErrno) | |
613 | { | |
614 | return anErrno == ENFILE || anErrno == EMFILE; | |
615 | } | |
d6827718 | 616 | |
057f5854 | 617 | int |
618 | comm_set_tos(int fd, int tos) | |
619 | { | |
620 | #ifdef IP_TOS | |
621 | int x = setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)); | |
622 | if (x < 0) | |
623 | debugs(50, 1, "comm_set_tos: setsockopt(IP_TOS) on FD " << fd << ": " << xstrerror()); | |
624 | return x; | |
625 | #else | |
e1a88700 | 626 | debugs(50, 0, "WARNING: setsockopt(IP_TOS) not supported on this platform"); |
e343a6ce | 627 | return -1; |
057f5854 | 628 | #endif |
629 | } | |
630 | ||
cc192b50 | 631 | void |
632 | comm_set_v6only(int fd, int tos) | |
633 | { | |
634 | #ifdef IPV6_V6ONLY | |
635 | if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) < 0) { | |
636 | debugs(50, 1, "comm_open: setsockopt(IPV6_V6ONLY) on FD " << fd << ": " << xstrerror()); | |
637 | } | |
638 | #else | |
639 | debugs(50, 0, "WARNING: comm_open: setsockopt(IPV6_V6ONLY) not supported on this platform"); | |
640 | #endif /* sockopt */ | |
641 | } | |
057f5854 | 642 | |
40d6264d AJ |
643 | /** |
644 | * Set the socket IP_TRANSPARENT option for Linux TPROXY v4 support. | |
645 | */ | |
f1e0717c | 646 | void |
e950e673 | 647 | comm_set_transparent(int fd) |
f1e0717c | 648 | { |
2ad20b4f | 649 | #if defined(IP_TRANSPARENT) |
e950e673 | 650 | int tos = 1; |
ef88b51d AJ |
651 | if (setsockopt(fd, SOL_IP, IP_TRANSPARENT, (char *) &tos, sizeof(int)) < 0) { |
652 | debugs(50, DBG_IMPORTANT, "comm_open: setsockopt(IP_TRANSPARENT) on FD " << fd << ": " << xstrerror()); | |
f1e0717c | 653 | } |
3949d8b7 AJ |
654 | else { |
655 | /* mark the socket as having transparent options */ | |
656 | fd_table[fd].flags.transparent = 1; | |
657 | } | |
f1e0717c | 658 | #else |
ef88b51d | 659 | debugs(50, DBG_CRITICAL, "WARNING: comm_open: setsockopt(IP_TRANSPARENT) not supported on this platform"); |
f1e0717c AJ |
660 | #endif /* sockopt */ |
661 | } | |
662 | ||
e1a88700 | 663 | /** |
664 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
665 | * is OR of flags specified in defines.h:COMM_* | |
666 | */ | |
d6827718 | 667 | int |
668 | comm_openex(int sock_type, | |
62e76326 | 669 | int proto, |
cc192b50 | 670 | IPAddress &addr, |
62e76326 | 671 | int flags, |
672 | unsigned char TOS, | |
673 | const char *note) | |
090089c4 | 674 | { |
675 | int new_socket; | |
76f87348 | 676 | fde *F = NULL; |
cc192b50 | 677 | int tos = 0; |
678 | struct addrinfo *AI = NULL; | |
090089c4 | 679 | |
88bfe092 | 680 | PROF_start(comm_open); |
090089c4 | 681 | /* Create socket for accepting new connections. */ |
83704487 | 682 | statCounter.syscalls.sock.sockets++; |
62e76326 | 683 | |
cc192b50 | 684 | /* Setup the socket addrinfo details for use */ |
685 | addr.GetAddrInfo(AI); | |
686 | AI->ai_socktype = sock_type; | |
687 | AI->ai_protocol = proto; | |
cc192b50 | 688 | |
689 | debugs(50, 3, "comm_openex: Attempt open socket for: " << addr ); | |
690 | ||
691 | if ((new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol)) < 0) | |
62e76326 | 692 | { |
693 | /* Increase the number of reserved fd's if calls to socket() | |
694 | * are failing because the open file table is full. This | |
695 | * limits the number of simultaneous clients */ | |
696 | ||
2d8c0b1a | 697 | if (limitError(errno)) { |
bf8fe701 | 698 | debugs(50, 1, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 699 | fdAdjustReserved(); |
2d8c0b1a | 700 | } else { |
bf8fe701 | 701 | debugs(50, 0, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 702 | } |
703 | ||
cc192b50 | 704 | addr.FreeAddrInfo(AI); |
705 | ||
62e76326 | 706 | PROF_stop(comm_open); |
707 | return -1; | |
090089c4 | 708 | } |
62e76326 | 709 | |
cc192b50 | 710 | debugs(50, 3, "comm_openex: Opened socket FD " << new_socket << " : family=" << AI->ai_family << ", type=" << AI->ai_socktype << ", protocol=" << AI->ai_protocol ); |
711 | ||
d6827718 | 712 | /* set TOS if needed */ |
cc192b50 | 713 | if (TOS && comm_set_tos(new_socket, TOS) ) { |
62e76326 | 714 | tos = TOS; |
cc192b50 | 715 | } |
62e76326 | 716 | |
cc192b50 | 717 | #if IPV6_SPECIAL_SPLITSTACK |
62e76326 | 718 | |
cc192b50 | 719 | if( addr.IsIPv6() ) |
720 | comm_set_v6only(new_socket, tos); | |
62e76326 | 721 | |
d6827718 | 722 | #endif |
62e76326 | 723 | |
9b1f7ee8 | 724 | #if IPV6_SPECIAL_V4MAPPED |
cc192b50 | 725 | |
726 | /* Windows Vista supports Dual-Sockets. BUT defaults them to V6ONLY. Turn it OFF. */ | |
9b1f7ee8 | 727 | /* Other OS may have this administratively disabled for general use. Same deal. */ |
cc192b50 | 728 | if( addr.IsIPv6() ) |
729 | comm_set_v6only(new_socket, 0); | |
730 | ||
731 | #endif | |
62e76326 | 732 | |
090089c4 | 733 | /* update fdstat */ |
bf8fe701 | 734 | debugs(5, 5, "comm_open: FD " << new_socket << " is a new socket"); |
62e76326 | 735 | |
b0469965 | 736 | assert(!isOpen(new_socket)); |
5c5783a2 | 737 | fd_open(new_socket, FD_SOCKET, note); |
62e76326 | 738 | |
c4b7a5a9 | 739 | fdd_table[new_socket].close_file = NULL; |
62e76326 | 740 | |
c4b7a5a9 | 741 | fdd_table[new_socket].close_line = 0; |
62e76326 | 742 | |
76f87348 | 743 | F = &fd_table[new_socket]; |
62e76326 | 744 | |
d6827718 | 745 | F->local_addr = addr; |
62e76326 | 746 | |
cc192b50 | 747 | F->tos = TOS; |
748 | ||
749 | F->sock_family = AI->ai_family; | |
62e76326 | 750 | |
79a15e0a | 751 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 752 | commSetCloseOnExec(new_socket); |
753 | ||
cdc33f35 | 754 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 755 | commSetReuseAddr(new_socket); |
756 | ||
cc192b50 | 757 | if (addr.GetPort() > (u_short) 0) |
62e76326 | 758 | { |
a50bfe93 | 759 | #ifdef _SQUID_MSWIN_ |
760 | ||
761 | if (sock_type != SOCK_DGRAM) | |
762 | #endif | |
763 | ||
764 | commSetNoLinger(new_socket); | |
62e76326 | 765 | |
766 | if (opt_reuseaddr) | |
767 | commSetReuseAddr(new_socket); | |
090089c4 | 768 | } |
62e76326 | 769 | |
a35595cd AJ |
770 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
771 | if((flags & COMM_TRANSPARENT)) { | |
772 | comm_set_transparent(new_socket); | |
773 | } | |
a35595cd | 774 | |
cc192b50 | 775 | if (!addr.IsNoAddr()) |
62e76326 | 776 | { |
cc192b50 | 777 | if (commBind(new_socket, *AI) != COMM_OK) { |
62e76326 | 778 | comm_close(new_socket); |
cc192b50 | 779 | addr.FreeAddrInfo(AI); |
62e76326 | 780 | return -1; |
781 | PROF_stop(comm_open); | |
782 | } | |
23ff6968 | 783 | } |
62e76326 | 784 | |
cc192b50 | 785 | addr.FreeAddrInfo(AI); |
090089c4 | 786 | |
79a15e0a | 787 | if (flags & COMM_NONBLOCKING) |
62e76326 | 788 | if (commSetNonBlocking(new_socket) == COMM_ERROR) |
789 | { | |
790 | return -1; | |
791 | PROF_stop(comm_open); | |
792 | } | |
793 | ||
30a4f2a8 | 794 | #ifdef TCP_NODELAY |
795 | if (sock_type == SOCK_STREAM) | |
62e76326 | 796 | commSetTcpNoDelay(new_socket); |
797 | ||
30a4f2a8 | 798 | #endif |
62e76326 | 799 | |
1241e63e | 800 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 801 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
802 | ||
88bfe092 | 803 | PROF_stop(comm_open); |
62e76326 | 804 | |
090089c4 | 805 | return new_socket; |
806 | } | |
807 | ||
d2d59a68 | 808 | CBDATA_CLASS_INIT(ConnectStateData); |
809 | ||
810 | void * | |
811 | ConnectStateData::operator new (size_t size) | |
812 | { | |
813 | CBDATA_INIT_TYPE(ConnectStateData); | |
814 | return cbdataAlloc(ConnectStateData); | |
815 | } | |
816 | ||
817 | void | |
818 | ConnectStateData::operator delete (void *address) | |
819 | { | |
820 | cbdataFree(address); | |
821 | } | |
822 | ||
b0469965 | 823 | |
824 | ||
e5f6c5c2 | 825 | void |
b0469965 | 826 | commConnectStart(int fd, const char *host, u_short port, AsyncCall::Pointer &cb) |
e924600d | 827 | { |
b0469965 | 828 | debugs(cb->debugSection, cb->debugLevel, "commConnectStart: FD " << fd << |
829 | ", cb " << cb << ", " << host << ":" << port); // TODO: just print *cb | |
830 | ||
28c60158 | 831 | ConnectStateData *cs; |
d2d59a68 | 832 | cs = new ConnectStateData; |
03a1ee42 | 833 | cs->fd = fd; |
e924600d | 834 | cs->host = xstrdup(host); |
cc192b50 | 835 | cs->default_port = port; |
b0469965 | 836 | cs->callback = cb; |
837 | ||
e924600d | 838 | comm_add_close_handler(fd, commConnectFree, cs); |
8407afee | 839 | ipcache_nbgethostbyname(host, commConnectDnsHandle, cs); |
edeb28fd | 840 | } |
841 | ||
b0469965 | 842 | // TODO: Remove this and similar callback registration functions by replacing |
843 | // (callback,data) parameters with an AsyncCall so that we do not have to use | |
844 | // a generic call name and debug level when creating an AsyncCall. This will | |
845 | // also cut the number of callback registration routines in half. | |
846 | void | |
847 | commConnectStart(int fd, const char *host, u_short port, CNCB * callback, void *data) | |
848 | { | |
849 | debugs(5, 5, "commConnectStart: FD " << fd << ", data " << data << ", " << host << ":" << port); | |
850 | AsyncCall::Pointer call = commCbCall(5,3, | |
851 | "SomeCommConnectHandler", CommConnectCbPtrFun(callback, data)); | |
852 | commConnectStart(fd, host, port, call); | |
853 | } | |
854 | ||
edeb28fd | 855 | static void |
03a1ee42 | 856 | commConnectDnsHandle(const ipcache_addrs * ia, void *data) |
edeb28fd | 857 | { |
e6ccf245 | 858 | ConnectStateData *cs = (ConnectStateData *)data; |
62e76326 | 859 | |
edeb28fd | 860 | if (ia == NULL) { |
bf8fe701 | 861 | debugs(5, 3, "commConnectDnsHandle: Unknown host: " << cs->host); |
62e76326 | 862 | |
863 | if (!dns_error_message) { | |
864 | dns_error_message = "Unknown DNS error"; | |
bf8fe701 | 865 | debugs(5, 1, "commConnectDnsHandle: Bad dns_error_message"); |
62e76326 | 866 | } |
867 | ||
868 | assert(dns_error_message != NULL); | |
2d8c0b1a | 869 | cs->callCallback(COMM_ERR_DNS, 0); |
62e76326 | 870 | return; |
edeb28fd | 871 | } |
62e76326 | 872 | |
f076b37b | 873 | assert(ia->cur < ia->count); |
cc192b50 | 874 | |
875 | cs->default_addr = ia->in_addrs[ia->cur]; | |
a12a049a | 876 | |
877 | if (Config.onoff.balance_on_multiple_ip) | |
878 | ipcacheCycleAddr(cs->host, NULL); | |
879 | ||
22c653cd | 880 | cs->addrcount = ia->count; |
a12a049a | 881 | |
22c653cd | 882 | cs->connstart = squid_curtime; |
a12a049a | 883 | |
2d8c0b1a | 884 | cs->connect(); |
e924600d | 885 | } |
886 | ||
2d8c0b1a | 887 | void |
888 | ConnectStateData::callCallback(comm_err_t status, int xerrno) | |
889 | { | |
b0469965 | 890 | debugs(5, 3, "commConnectCallback: FD " << fd); |
bf8fe701 | 891 | |
2d8c0b1a | 892 | comm_remove_close_handler(fd, commConnectFree, this); |
e1b16349 | 893 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 894 | |
b0469965 | 895 | typedef CommConnectCbParams Params; |
896 | Params ¶ms = GetCommParams<Params>(callback); | |
897 | params.fd = fd; | |
898 | params.flag = status; | |
899 | params.xerrno = xerrno; | |
900 | ScheduleCallHere(callback); | |
901 | callback = NULL; | |
62e76326 | 902 | |
744c68f5 | 903 | commConnectFree(fd, this); |
f88211e8 | 904 | } |
905 | ||
e924600d | 906 | static void |
9daca08e | 907 | commConnectFree(int fd, void *data) |
e924600d | 908 | { |
e6ccf245 | 909 | ConnectStateData *cs = (ConnectStateData *)data; |
bf8fe701 | 910 | debugs(5, 3, "commConnectFree: FD " << fd); |
b0469965 | 911 | // delete cs->callback; |
912 | cs->callback = NULL; | |
8407afee | 913 | safe_free(cs->host); |
00d77d6b | 914 | delete cs; |
e924600d | 915 | } |
916 | ||
2d8c0b1a | 917 | static void |
918 | copyFDFlags(int to, fde *F) | |
919 | { | |
920 | if (F->flags.close_on_exec) | |
921 | commSetCloseOnExec(to); | |
922 | ||
923 | if (F->flags.nonblocking) | |
924 | commSetNonBlocking(to); | |
925 | ||
926 | #ifdef TCP_NODELAY | |
927 | ||
928 | if (F->flags.nodelay) | |
929 | commSetTcpNoDelay(to); | |
930 | ||
931 | #endif | |
932 | ||
933 | if (Config.tcpRcvBufsz > 0) | |
934 | commSetTcpRcvbuf(to, Config.tcpRcvBufsz); | |
935 | } | |
936 | ||
22c653cd | 937 | /* Reset FD so that we can connect() again */ |
0b77ecd8 | 938 | int |
939 | ConnectStateData::commResetFD() | |
edeb28fd | 940 | { |
cc192b50 | 941 | struct addrinfo *AI = NULL; |
942 | IPAddress nul; | |
9d92af86 | 943 | int new_family = AF_UNSPEC; |
cc192b50 | 944 | |
b0469965 | 945 | // XXX: do we have to check this? |
946 | // | |
947 | // if (!cbdataReferenceValid(callback.data)) | |
948 | // return 0; | |
62e76326 | 949 | |
83704487 | 950 | statCounter.syscalls.sock.sockets++; |
62e76326 | 951 | |
cc192b50 | 952 | /* setup a bare-bones addrinfo */ |
9d92af86 | 953 | /* TODO INET6: for WinXP we may need to check the local_addr type and setup the family properly. */ |
cc192b50 | 954 | nul.GetAddrInfo(AI); |
9d92af86 | 955 | new_family = AI->ai_family; |
cc192b50 | 956 | |
957 | int fd2 = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); | |
958 | ||
959 | nul.FreeAddrInfo(AI); | |
62e76326 | 960 | |
edeb28fd | 961 | if (fd2 < 0) { |
f3767a6a | 962 | debugs(5, 0, HERE << "socket: " << xstrerror()); |
62e76326 | 963 | |
964 | if (ENFILE == errno || EMFILE == errno) | |
965 | fdAdjustReserved(); | |
966 | ||
967 | return 0; | |
edeb28fd | 968 | } |
62e76326 | 969 | |
68aa4272 | 970 | #ifdef _SQUID_MSWIN_ |
971 | ||
972 | /* On Windows dup2() can't work correctly on Sockets, the */ | |
973 | /* workaround is to close the destination Socket before call them. */ | |
0b77ecd8 | 974 | close(fd); |
68aa4272 | 975 | |
976 | #endif | |
977 | ||
0b77ecd8 | 978 | if (dup2(fd2, fd) < 0) { |
f3767a6a | 979 | debugs(5, 0, HERE << "dup2: " << xstrerror()); |
62e76326 | 980 | |
981 | if (ENFILE == errno || EMFILE == errno) | |
982 | fdAdjustReserved(); | |
983 | ||
984 | close(fd2); | |
985 | ||
986 | return 0; | |
edeb28fd | 987 | } |
3a5a4930 | 988 | commResetSelect(fd); |
62e76326 | 989 | |
edeb28fd | 990 | close(fd2); |
0b77ecd8 | 991 | fde *F = &fd_table[fd]; |
9d92af86 AJ |
992 | |
993 | /* INET6: copy the new sockets family type to the FDE table */ | |
994 | fd_table[fd].sock_family = new_family; | |
995 | ||
0b77ecd8 | 996 | fd_table[fd].flags.called_connect = 0; |
09544acc | 997 | /* |
998 | * yuck, this has assumptions about comm_open() arguments for | |
999 | * the original socket | |
1000 | */ | |
62e76326 | 1001 | |
e17b4929 AJ |
1002 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
1003 | if( F->flags.transparent ) { | |
1004 | comm_set_transparent(fd); | |
1005 | } | |
1006 | ||
cc192b50 | 1007 | AI = NULL; |
1008 | F->local_addr.GetAddrInfo(AI); | |
1009 | ||
1010 | if (commBind(fd, *AI) != COMM_OK) { | |
68d57d84 | 1011 | debugs(5, DBG_CRITICAL, "WARNING: Reset of FD " << fd << " for " << F->local_addr << " failed to bind: " << xstrerror()); |
cc192b50 | 1012 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 1013 | return 0; |
09544acc | 1014 | } |
cc192b50 | 1015 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 1016 | |
cc192b50 | 1017 | if (F->tos) |
1018 | comm_set_tos(fd, F->tos); | |
1019 | ||
1020 | #if IPV6_SPECIAL_SPLITSTACK | |
1021 | ||
1022 | if( F->local_addr.IsIPv6() ) | |
1023 | comm_set_v6only(fd, F->tos); | |
62e76326 | 1024 | |
d6827718 | 1025 | #endif |
cc192b50 | 1026 | |
f3767a6a | 1027 | copyFDFlags(fd, F); |
62e76326 | 1028 | |
edeb28fd | 1029 | return 1; |
1030 | } | |
1031 | ||
0b77ecd8 | 1032 | int |
1033 | ConnectStateData::commRetryConnect() | |
22c653cd | 1034 | { |
0b77ecd8 | 1035 | assert(addrcount > 0); |
62e76326 | 1036 | |
0b77ecd8 | 1037 | if (addrcount == 1) { |
1038 | if (tries >= Config.retry.maxtries) | |
62e76326 | 1039 | return 0; |
1040 | ||
0b77ecd8 | 1041 | if (squid_curtime - connstart > Config.Timeout.connect) |
62e76326 | 1042 | return 0; |
22c653cd | 1043 | } else { |
0b77ecd8 | 1044 | if (tries > addrcount) |
62e76326 | 1045 | return 0; |
22c653cd | 1046 | } |
62e76326 | 1047 | |
0b77ecd8 | 1048 | return commResetFD(); |
22c653cd | 1049 | } |
1050 | ||
4ed0e075 | 1051 | static void |
1052 | commReconnect(void *data) | |
1053 | { | |
1054 | ConnectStateData *cs = (ConnectStateData *)data; | |
1055 | ipcache_nbgethostbyname(cs->host, commConnectDnsHandle, cs); | |
1056 | } | |
1057 | ||
f3767a6a | 1058 | /** Connect SOCK to specified DEST_PORT at DEST_HOST. */ |
2d8c0b1a | 1059 | void |
f3767a6a | 1060 | ConnectStateData::Connect(int fd, void *me) |
090089c4 | 1061 | { |
2d8c0b1a | 1062 | ConnectStateData *cs = (ConnectStateData *)me; |
1063 | assert (cs->fd == fd); | |
1064 | cs->connect(); | |
1065 | } | |
1066 | ||
1067 | void | |
1068 | ConnectStateData::defaults() | |
1069 | { | |
cc192b50 | 1070 | S = default_addr; |
1071 | S.SetPort(default_port); | |
2d8c0b1a | 1072 | } |
62e76326 | 1073 | |
2d8c0b1a | 1074 | void |
1075 | ConnectStateData::connect() | |
1076 | { | |
cc192b50 | 1077 | if (S.IsAnyAddr()) |
2d8c0b1a | 1078 | defaults(); |
62e76326 | 1079 | |
f3767a6a | 1080 | debugs(5,5, HERE << "to " << S); |
cc192b50 | 1081 | |
1082 | switch (comm_connect_addr(fd, S) ) { | |
62e76326 | 1083 | |
e5f6c5c2 | 1084 | case COMM_INPROGRESS: |
f3767a6a | 1085 | debugs(5, 5, HERE << "FD " << fd << ": COMM_INPROGRESS"); |
2d8c0b1a | 1086 | commSetSelect(fd, COMM_SELECT_WRITE, ConnectStateData::Connect, this, 0); |
62e76326 | 1087 | break; |
1088 | ||
e5f6c5c2 | 1089 | case COMM_OK: |
f3767a6a | 1090 | debugs(5, 5, HERE << "FD " << fd << ": COMM_OK - connected"); |
cc192b50 | 1091 | ipcacheMarkGoodAddr(host, S); |
2d8c0b1a | 1092 | callCallback(COMM_OK, 0); |
62e76326 | 1093 | break; |
1094 | ||
9d92af86 AJ |
1095 | #if USE_IPV6 |
1096 | case COMM_ERR_PROTOCOL: | |
1097 | /* problem using the desired protocol over this socket. | |
1098 | * count the connection attempt, reset the socket, and immediately try again */ | |
1099 | tries++; | |
1100 | commResetFD(); | |
1101 | connect(); | |
1102 | break; | |
1103 | #endif | |
1104 | ||
e5f6c5c2 | 1105 | default: |
f3767a6a | 1106 | debugs(5, 5, HERE "FD " << fd << ": * - try again"); |
2d8c0b1a | 1107 | tries++; |
cc192b50 | 1108 | ipcacheMarkBadAddr(host, S); |
62e76326 | 1109 | |
1110 | if (Config.onoff.test_reachability) | |
cc192b50 | 1111 | netdbDeleteAddrNetwork(S); |
62e76326 | 1112 | |
0b77ecd8 | 1113 | if (commRetryConnect()) { |
4ed0e075 | 1114 | eventAdd("commReconnect", commReconnect, this, this->addrcount == 1 ? 0.05 : 0.0, 0); |
62e76326 | 1115 | } else { |
f3767a6a | 1116 | debugs(5, 5, HERE << "FD " << fd << ": * - ERR tried too many times already."); |
2d8c0b1a | 1117 | callCallback(COMM_ERR_CONNECT, errno); |
62e76326 | 1118 | } |
090089c4 | 1119 | } |
090089c4 | 1120 | } |
b0469965 | 1121 | /* |
b8d8561b | 1122 | int |
b0469965 | 1123 | commSetTimeout_old(int fd, int timeout, PF * handler, void *data) |
090089c4 | 1124 | { |
f3767a6a | 1125 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
03eb2f01 | 1126 | assert(fd >= 0); |
1127 | assert(fd < Squid_MaxFD); | |
2d8c0b1a | 1128 | fde *F = &fd_table[fd]; |
60c0b5a2 | 1129 | assert(F->flags.open); |
62e76326 | 1130 | |
5c5783a2 | 1131 | if (timeout < 0) { |
62e76326 | 1132 | cbdataReferenceDone(F->timeout_data); |
1133 | F->timeout_handler = NULL; | |
1134 | F->timeout = 0; | |
5849612f | 1135 | } else { |
62e76326 | 1136 | if (handler) { |
1137 | cbdataReferenceDone(F->timeout_data); | |
1138 | F->timeout_handler = handler; | |
1139 | F->timeout_data = cbdataReference(data); | |
1140 | } | |
1141 | ||
1142 | F->timeout = squid_curtime + (time_t) timeout; | |
30a4f2a8 | 1143 | } |
62e76326 | 1144 | |
a3fa14bf | 1145 | return F->timeout; |
090089c4 | 1146 | } |
b0469965 | 1147 | */ |
1148 | ||
1149 | int | |
1150 | commSetTimeout(int fd, int timeout, PF * handler, void *data) | |
1151 | { | |
1152 | AsyncCall::Pointer call; | |
f3767a6a | 1153 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
b0469965 | 1154 | if(handler != NULL) |
1155 | call=commCbCall(5,4, "SomeTimeoutHandler", CommTimeoutCbPtrFun(handler, data)); | |
1156 | else | |
1157 | call = NULL; | |
1158 | return commSetTimeout(fd, timeout, call); | |
1159 | } | |
1160 | ||
1161 | ||
1162 | int commSetTimeout(int fd, int timeout, AsyncCall::Pointer &callback) | |
1163 | { | |
f3767a6a | 1164 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
b0469965 | 1165 | assert(fd >= 0); |
1166 | assert(fd < Squid_MaxFD); | |
1167 | fde *F = &fd_table[fd]; | |
1168 | assert(F->flags.open); | |
1169 | ||
1170 | if (timeout < 0) { | |
1171 | F->timeoutHandler = NULL; | |
1172 | F->timeout = 0; | |
1173 | } else { | |
1174 | if (callback != NULL) { | |
1175 | typedef CommTimeoutCbParams Params; | |
1176 | Params ¶ms = GetCommParams<Params>(callback); | |
1177 | params.fd = fd; | |
1178 | F->timeoutHandler = callback; | |
1179 | } | |
1180 | ||
1181 | F->timeout = squid_curtime + (time_t) timeout; | |
1182 | } | |
1183 | ||
1184 | return F->timeout; | |
1185 | ||
1186 | } | |
090089c4 | 1187 | |
b8d8561b | 1188 | int |
cc192b50 | 1189 | comm_connect_addr(int sock, const IPAddress &address) |
090089c4 | 1190 | { |
3d7e9d7c | 1191 | comm_err_t status = COMM_OK; |
76f87348 | 1192 | fde *F = &fd_table[sock]; |
cc192b50 | 1193 | int x = 0; |
b5568a61 | 1194 | int err = 0; |
9689d97c | 1195 | socklen_t errlen; |
feca3b9a | 1196 | struct addrinfo *AI = NULL; |
88bfe092 | 1197 | PROF_start(comm_connect_addr); |
cc192b50 | 1198 | |
1199 | assert(address.GetPort() != 0); | |
1200 | ||
b0469965 | 1201 | debugs(5, 9, "comm_connect_addr: connecting socket " << sock << " to " << address << " (want family: " << F->sock_family << ")"); |
cc192b50 | 1202 | |
9d92af86 AJ |
1203 | /* BUG 2222 FIX: reset the FD when its found to be IPv4 in IPv6 mode */ |
1204 | /* inverse case of IPv4 failing to connect on IPv6 socket is handeld post-connect. | |
1205 | * this case must presently be handled here since the GetAddrInfo asserts on bad mappings. | |
1206 | * eventually we want it to throw a Must() that gets handled there instead of this if. | |
1207 | * NP: because commresetFD is private to ConnStateData we have to return an error and | |
1208 | * trust its handled properly. | |
1209 | */ | |
1210 | #if USE_IPV6 | |
1211 | if(F->sock_family == AF_INET && !address.IsIPv4()) { | |
1212 | return COMM_ERR_PROTOCOL; | |
1213 | } | |
1214 | #endif | |
1215 | ||
feca3b9a | 1216 | address.GetAddrInfo(AI, F->sock_family); |
cc192b50 | 1217 | |
090089c4 | 1218 | /* Establish connection. */ |
b5568a61 | 1219 | errno = 0; |
62e76326 | 1220 | |
1221 | if (!F->flags.called_connect) | |
1222 | { | |
1223 | F->flags.called_connect = 1; | |
1224 | statCounter.syscalls.sock.connects++; | |
1225 | ||
feca3b9a | 1226 | x = connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 1227 | |
5a33a66a | 1228 | // XXX: ICAP code refuses callbacks during a pending comm_ call |
1229 | // Async calls development will fix this. | |
1230 | if (x == 0) { | |
1231 | x = -1; | |
1232 | errno = EINPROGRESS; | |
1233 | } | |
1234 | ||
62e76326 | 1235 | if (x < 0) |
cc192b50 | 1236 | { |
1237 | debugs(5,5, "comm_connect_addr: sock=" << sock << ", addrinfo( " << | |
feca3b9a AJ |
1238 | " flags=" << AI->ai_flags << |
1239 | ", family=" << AI->ai_family << | |
1240 | ", socktype=" << AI->ai_socktype << | |
1241 | ", protocol=" << AI->ai_protocol << | |
1242 | ", &addr=" << AI->ai_addr << | |
1243 | ", addrlen=" << AI->ai_addrlen << | |
cc192b50 | 1244 | " )" ); |
1245 | debugs(5, 9, "connect FD " << sock << ": (" << x << ") " << xstrerror()); | |
1246 | debugs(14,9, "connecting to: " << address ); | |
1247 | } | |
62e76326 | 1248 | } else |
1249 | { | |
140e2c0b | 1250 | #if defined(_SQUID_NEWSOS6_) |
62e76326 | 1251 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
1252 | ||
feca3b9a | 1253 | connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 1254 | |
1255 | if (errno == EINVAL) { | |
1256 | errlen = sizeof(err); | |
1257 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1258 | ||
1259 | if (x >= 0) | |
1260 | errno = x; | |
1261 | } | |
1262 | ||
33ac9442 | 1263 | #else |
62e76326 | 1264 | errlen = sizeof(err); |
1265 | ||
1266 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1267 | ||
1268 | if (x == 0) | |
1269 | errno = err; | |
1270 | ||
b5568a61 | 1271 | #if defined(_SQUID_SOLARIS_) |
62e76326 | 1272 | /* |
1273 | * Solaris 2.4's socket emulation doesn't allow you | |
1274 | * to determine the error from a failed non-blocking | |
1275 | * connect and just returns EPIPE. Create a fake | |
1276 | * error message for connect. -- fenner@parc.xerox.com | |
1277 | */ | |
1278 | if (x < 0 && errno == EPIPE) | |
1279 | errno = ENOTCONN; | |
1280 | ||
33ac9442 | 1281 | #endif |
30a4f2a8 | 1282 | #endif |
62e76326 | 1283 | |
e5f6c5c2 | 1284 | } |
62e76326 | 1285 | |
82ec8dfc AR |
1286 | /* Squid seems to be working fine without this code. With this code, |
1287 | * we leak memory on many connect requests because of EINPROGRESS. | |
1288 | * If you find that this code is needed, please file a bug report. */ | |
1289 | #if 0 | |
feca3b9a AJ |
1290 | #ifdef _SQUID_LINUX_ |
1291 | /* 2007-11-27: | |
1292 | * Linux Debian replaces our allocated AI pointer with garbage when | |
1293 | * connect() fails. This leads to segmentation faults deallocating | |
1294 | * the system-allocated memory when we go to clean up our pointer. | |
1295 | * HACK: is to leak the memory returned since we can't deallocate. | |
1296 | */ | |
1297 | if(errno != 0) { | |
1298 | AI = NULL; | |
1299 | } | |
82ec8dfc | 1300 | #endif |
feca3b9a AJ |
1301 | #endif |
1302 | ||
1303 | address.FreeAddrInfo(AI); | |
1304 | ||
88bfe092 | 1305 | PROF_stop(comm_connect_addr); |
62e76326 | 1306 | |
b5568a61 | 1307 | if (errno == 0 || errno == EISCONN) |
62e76326 | 1308 | status = COMM_OK; |
b5568a61 | 1309 | else if (ignoreErrno(errno)) |
62e76326 | 1310 | status = COMM_INPROGRESS; |
b5568a61 | 1311 | else |
cc192b50 | 1312 | #if USE_IPV6 |
1313 | if( address.IsIPv4() && F->sock_family == AF_INET6 ) { | |
1314 | ||
1315 | /* failover to trying IPv4-only link if an IPv6 one fails */ | |
1316 | /* to catch the edge case of apps listening on IPv4-localhost */ | |
1317 | F->sock_family = AF_INET; | |
1318 | int res = comm_connect_addr(sock, address); | |
1319 | ||
1320 | /* if that fails too, undo our temporary socktype hack so the repeat works properly. */ | |
1321 | if(res == COMM_ERROR) | |
1322 | F->sock_family = AF_INET6; | |
1323 | ||
1324 | return res; | |
1325 | } | |
1326 | else | |
1327 | #endif | |
62e76326 | 1328 | return COMM_ERROR; |
1329 | ||
cc192b50 | 1330 | address.NtoA(F->ipaddr, MAX_IPSTRLEN); |
62e76326 | 1331 | |
cc192b50 | 1332 | F->remote_port = address.GetPort(); /* remote_port is HS */ |
62e76326 | 1333 | |
1334 | if (status == COMM_OK) | |
1335 | { | |
cc192b50 | 1336 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connected to " << address); |
62e76326 | 1337 | } else if (status == COMM_INPROGRESS) |
1338 | { | |
bf8fe701 | 1339 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 1340 | } |
62e76326 | 1341 | |
090089c4 | 1342 | return status; |
1343 | } | |
1344 | ||
1345 | /* Wait for an incoming connection on FD. FD should be a socket returned | |
1346 | * from comm_listen. */ | |
ee0989f2 | 1347 | static int |
1348 | comm_old_accept(int fd, ConnectionDetail &details) | |
090089c4 | 1349 | { |
88bfe092 | 1350 | PROF_start(comm_accept); |
ee0989f2 | 1351 | statCounter.syscalls.sock.accepts++; |
1352 | int sock; | |
cc192b50 | 1353 | struct addrinfo *gai = NULL; |
1354 | details.me.InitAddrInfo(gai); | |
1355 | ||
1356 | if ((sock = accept(fd, gai->ai_addr, &gai->ai_addrlen)) < 0) { | |
1357 | ||
1358 | details.me.FreeAddrInfo(gai); | |
62e76326 | 1359 | |
62e76326 | 1360 | PROF_stop(comm_accept); |
1361 | ||
1362 | if (ignoreErrno(errno)) | |
1363 | { | |
bf8fe701 | 1364 | debugs(50, 5, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1365 | return COMM_NOMESSAGE; |
1366 | } else if (ENFILE == errno || EMFILE == errno) | |
1367 | { | |
bf8fe701 | 1368 | debugs(50, 3, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1369 | return COMM_ERROR; |
1370 | } else | |
1371 | { | |
bf8fe701 | 1372 | debugs(50, 1, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1373 | return COMM_ERROR; |
1374 | } | |
090089c4 | 1375 | } |
62e76326 | 1376 | |
cc192b50 | 1377 | details.peer = *gai; |
1378 | ||
3be4d5d1 | 1379 | details.me.InitAddrInfo(gai); |
1380 | ||
cc192b50 | 1381 | details.me.SetEmpty(); |
1382 | getsockname(sock, gai->ai_addr, &gai->ai_addrlen); | |
1383 | details.me = *gai; | |
62e76326 | 1384 | |
3ca60c86 | 1385 | commSetCloseOnExec(sock); |
cc192b50 | 1386 | |
090089c4 | 1387 | /* fdstat update */ |
5c5783a2 | 1388 | fd_open(sock, FD_SOCKET, "HTTP Request"); |
c4b7a5a9 | 1389 | fdd_table[sock].close_file = NULL; |
1390 | fdd_table[sock].close_line = 0; | |
ee0989f2 | 1391 | fde *F = &fd_table[sock]; |
cc192b50 | 1392 | details.peer.NtoA(F->ipaddr,MAX_IPSTRLEN); |
1393 | F->remote_port = details.peer.GetPort(); | |
1394 | F->local_addr.SetPort(details.me.GetPort()); | |
3be4d5d1 | 1395 | #if USE_IPV6 |
1396 | F->sock_family = AF_INET; | |
1397 | #else | |
1398 | F->sock_family = details.me.IsIPv4()?AF_INET:AF_INET6; | |
1399 | #endif | |
1400 | details.me.FreeAddrInfo(gai); | |
cc192b50 | 1401 | |
090089c4 | 1402 | commSetNonBlocking(sock); |
cc192b50 | 1403 | |
acaa7194 AJ |
1404 | /* IFF the socket is (tproxy) transparent, pass the flag down to allow spoofing */ |
1405 | F->flags.transparent = fd_table[fd].flags.transparent; | |
72d57dea | 1406 | |
88bfe092 | 1407 | PROF_stop(comm_accept); |
090089c4 | 1408 | return sock; |
1409 | } | |
1410 | ||
cb201b7e | 1411 | void |
1412 | commCallCloseHandlers(int fd) | |
1413 | { | |
76f87348 | 1414 | fde *F = &fd_table[fd]; |
bf8fe701 | 1415 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 1416 | |
8000a965 | 1417 | while (F->closeHandler != NULL) { |
b0469965 | 1418 | AsyncCall::Pointer call = F->closeHandler; |
1419 | F->closeHandler = call->Next(); | |
1420 | call->setNext(NULL); | |
1421 | // If call is not canceled schedule it for execution else ignore it | |
1422 | if(!call->canceled()){ | |
1423 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << call); | |
1424 | typedef CommCloseCbParams Params; | |
1425 | Params ¶ms = GetCommParams<Params>(call); | |
1426 | params.fd = fd; | |
1427 | ScheduleCallHere(call); | |
1428 | } | |
cb201b7e | 1429 | } |
1430 | } | |
1431 | ||
5492ad1d | 1432 | #if LINGERING_CLOSE |
1433 | static void | |
1434 | commLingerClose(int fd, void *unused) | |
1435 | { | |
1436 | LOCAL_ARRAY(char, buf, 1024); | |
1437 | int n; | |
1f7c9178 | 1438 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 1439 | |
5492ad1d | 1440 | if (n < 0) |
bf8fe701 | 1441 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1442 | |
5492ad1d | 1443 | comm_close(fd); |
1444 | } | |
1445 | ||
1446 | static void | |
1447 | commLingerTimeout(int fd, void *unused) | |
1448 | { | |
bf8fe701 | 1449 | debugs(5, 3, "commLingerTimeout: FD " << fd); |
5492ad1d | 1450 | comm_close(fd); |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * Inspired by apache | |
1455 | */ | |
1456 | void | |
1457 | comm_lingering_close(int fd) | |
1458 | { | |
d4c19b39 | 1459 | #if USE_SSL |
62e76326 | 1460 | |
d4c19b39 | 1461 | if (fd_table[fd].ssl) |
62e76326 | 1462 | ssl_shutdown_method(fd); |
1463 | ||
d4c19b39 | 1464 | #endif |
62e76326 | 1465 | |
5492ad1d | 1466 | if (shutdown(fd, 1) < 0) { |
62e76326 | 1467 | comm_close(fd); |
1468 | return; | |
5492ad1d | 1469 | } |
62e76326 | 1470 | |
5492ad1d | 1471 | fd_note(fd, "lingering close"); |
1472 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
1473 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
1474 | } | |
62e76326 | 1475 | |
5492ad1d | 1476 | #endif |
1477 | ||
98264874 | 1478 | /* |
1479 | * enable linger with time of 0 so that when the socket is | |
1480 | * closed, TCP generates a RESET | |
1481 | */ | |
1482 | void | |
1483 | comm_reset_close(int fd) | |
1484 | { | |
62e76326 | 1485 | |
98264874 | 1486 | struct linger L; |
1487 | L.l_onoff = 1; | |
1488 | L.l_linger = 0; | |
62e76326 | 1489 | |
98264874 | 1490 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1491 | debugs(50, 0, "commResetTCPClose: FD " << fd << ": " << xstrerror()); |
62e76326 | 1492 | |
98264874 | 1493 | comm_close(fd); |
1494 | } | |
1495 | ||
2d8c0b1a | 1496 | void |
b0469965 | 1497 | CommRead::doCallback(comm_err_t errcode, int xerrno) |
2d8c0b1a | 1498 | { |
b0469965 | 1499 | if (callback != NULL) { |
1500 | typedef CommIoCbParams Params; | |
1501 | Params ¶ms = GetCommParams<Params>(callback); | |
1502 | params.fd = fd; | |
1503 | params.size = 0; | |
1504 | params.flag = errcode; | |
1505 | params.xerrno = xerrno; | |
1506 | ScheduleCallHere(callback); | |
1507 | callback = NULL; | |
1508 | } | |
2d8c0b1a | 1509 | } |
1510 | ||
10b06767 AJ |
1511 | void |
1512 | comm_close_start(int fd, void *data) | |
1513 | { | |
10b06767 | 1514 | #if USE_SSL |
86dedcc1 | 1515 | fde *F = &fd_table[fd]; |
10b06767 AJ |
1516 | if (F->ssl) |
1517 | ssl_shutdown_method(fd); | |
1518 | ||
1519 | #endif | |
1520 | ||
1521 | } | |
1522 | ||
1523 | ||
b0469965 | 1524 | void |
1525 | comm_close_complete(int fd, void *data) | |
2d8c0b1a | 1526 | { |
b0469965 | 1527 | #if USE_SSL |
1528 | fde *F = &fd_table[fd]; | |
2d8c0b1a | 1529 | |
b0469965 | 1530 | if (F->ssl) { |
1531 | SSL_free(F->ssl); | |
1532 | F->ssl = NULL; | |
1533 | } | |
2d8c0b1a | 1534 | |
b0469965 | 1535 | #endif |
1536 | fd_close(fd); /* update fdstat */ | |
1537 | ||
1538 | close(fd); | |
1539 | ||
b0469965 | 1540 | fdc_table[fd] = AcceptFD(fd); |
1541 | ||
1542 | statCounter.syscalls.sock.closes++; | |
1543 | ||
1544 | /* When an fd closes, give accept() a chance, if need be */ | |
1545 | ||
1546 | if (fdNFree() >= RESERVED_FD) | |
1547 | AcceptLimiter::Instance().kick(); | |
2d8c0b1a | 1548 | |
2d8c0b1a | 1549 | } |
c4b7a5a9 | 1550 | |
1551 | /* | |
1552 | * Close the socket fd. | |
1553 | * | |
1554 | * + call write handlers with ERR_CLOSING | |
1555 | * + call read handlers with ERR_CLOSING | |
1556 | * + call closing handlers | |
a46d2c0e | 1557 | * |
1558 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a | |
1559 | * DeferredReadManager. | |
c4b7a5a9 | 1560 | */ |
b8d8561b | 1561 | void |
43ae1d95 | 1562 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1563 | { |
82ec8dfc | 1564 | debugs(5, 3, "comm_close: start closing FD " << fd); |
03eb2f01 | 1565 | assert(fd >= 0); |
1566 | assert(fd < Squid_MaxFD); | |
82ec8dfc AR |
1567 | |
1568 | fde *F = &fd_table[fd]; | |
c4b7a5a9 | 1569 | fdd_table[fd].close_file = file; |
1570 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1571 | |
82ec8dfc | 1572 | if (F->closing()) |
62e76326 | 1573 | return; |
1574 | ||
60c0b5a2 | 1575 | if (shutting_down && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1576 | return; |
1577 | ||
c4b7a5a9 | 1578 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
b0469965 | 1579 | assert(isOpen(fd)); |
62e76326 | 1580 | |
76f87348 | 1581 | assert(F->type != FD_FILE); |
62e76326 | 1582 | |
88bfe092 | 1583 | PROF_start(comm_close); |
62e76326 | 1584 | |
10b06767 | 1585 | F->flags.close_request = 1; |
62e76326 | 1586 | |
10b06767 AJ |
1587 | AsyncCall::Pointer startCall=commCbCall(5,4, "comm_close_start", |
1588 | CommCloseCbPtrFun(comm_close_start, NULL)); | |
1589 | typedef CommCloseCbParams Params; | |
1590 | Params &startParams = GetCommParams<Params>(startCall); | |
1591 | startParams.fd = fd; | |
1592 | ScheduleCallHere(startCall); | |
62e76326 | 1593 | |
fa80a8ef | 1594 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1595 | |
82ec8dfc | 1596 | // notify read/write handlers |
2b663917 | 1597 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { |
b0469965 | 1598 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1599 | } |
1600 | if (commio_has_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd))) { | |
b0469965 | 1601 | commio_finish_callback(fd, COMMIO_FD_READCB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1602 | } |
2d8c0b1a | 1603 | |
82ec8dfc | 1604 | // notify accept handlers |
b0469965 | 1605 | fdc_table[fd].notify(-1, COMM_ERR_CLOSING, 0, ConnectionDetail()); |
c4b7a5a9 | 1606 | |
cb201b7e | 1607 | commCallCloseHandlers(fd); |
62e76326 | 1608 | |
781ce8ff | 1609 | if (F->pconn.uses) |
1610 | F->pconn.pool->count(F->pconn.uses); | |
62e76326 | 1611 | |
a7ad6e4e | 1612 | comm_empty_os_read_buffers(fd); |
b0469965 | 1613 | |
62e76326 | 1614 | |
10b06767 | 1615 | AsyncCall::Pointer completeCall=commCbCall(5,4, "comm_close_complete", |
b0469965 | 1616 | CommCloseCbPtrFun(comm_close_complete, NULL)); |
10b06767 AJ |
1617 | Params &completeParams = GetCommParams<Params>(completeCall); |
1618 | completeParams.fd = fd; | |
82ec8dfc AR |
1619 | // must use async call to wait for all callbacks |
1620 | // scheduled before comm_close() to finish | |
10b06767 | 1621 | ScheduleCallHere(completeCall); |
62e76326 | 1622 | |
88bfe092 | 1623 | PROF_stop(comm_close); |
090089c4 | 1624 | } |
1625 | ||
090089c4 | 1626 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1627 | int |
5df61230 | 1628 | comm_udp_sendto(int fd, |
cc192b50 | 1629 | const IPAddress &to_addr, |
62e76326 | 1630 | const void *buf, |
1631 | int len) | |
090089c4 | 1632 | { |
cc192b50 | 1633 | int x = 0; |
1634 | struct addrinfo *AI = NULL; | |
1635 | ||
88bfe092 | 1636 | PROF_start(comm_udp_sendto); |
83704487 | 1637 | statCounter.syscalls.sock.sendtos++; |
62e76326 | 1638 | |
cc192b50 | 1639 | debugs(50, 3, "comm_udp_sendto: Attempt to send UDP packet to " << to_addr << |
1640 | " using FD " << fd << " using Port " << comm_local_port(fd) ); | |
1641 | ||
1642 | /* BUG: something in the above macro appears to occasionally be setting AI to garbage. */ | |
1643 | /* AYJ: 2007-08-27 : or was it because I wasn't then setting 'fd_table[fd].sock_family' to fill properly. */ | |
1644 | assert( NULL == AI ); | |
1645 | ||
1646 | to_addr.GetAddrInfo(AI, fd_table[fd].sock_family); | |
1647 | ||
1648 | x = sendto(fd, buf, len, 0, AI->ai_addr, AI->ai_addrlen); | |
1649 | ||
1650 | to_addr.FreeAddrInfo(AI); | |
1651 | ||
88bfe092 | 1652 | PROF_stop(comm_udp_sendto); |
62e76326 | 1653 | |
2d8c0b1a | 1654 | if (x >= 0) |
1655 | return x; | |
1656 | ||
17d51783 | 1657 | #ifdef _SQUID_LINUX_ |
62e76326 | 1658 | |
2d8c0b1a | 1659 | if (ECONNREFUSED != errno) |
17d51783 | 1660 | #endif |
62e76326 | 1661 | |
cc192b50 | 1662 | debugs(50, 1, "comm_udp_sendto: FD " << fd << ", (family=" << fd_table[fd].sock_family << ") " << to_addr << ": " << xstrerror()); |
62e76326 | 1663 | |
2d8c0b1a | 1664 | return COMM_ERROR; |
090089c4 | 1665 | } |
1666 | ||
b8d8561b | 1667 | void |
582b6456 | 1668 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 1669 | { |
bf8fe701 | 1670 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1671 | handler << ", data=" << data); | |
62e76326 | 1672 | |
b0469965 | 1673 | AsyncCall::Pointer call=commCbCall(5,4, "SomeCloseHandler", |
1674 | CommCloseCbPtrFun(handler, data)); | |
1675 | comm_add_close_handler(fd, call); | |
1676 | } | |
62e76326 | 1677 | |
b0469965 | 1678 | void |
1679 | comm_add_close_handler(int fd, AsyncCall::Pointer &call) | |
1680 | { | |
1681 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1682 | |
b0469965 | 1683 | /*TODO:Check for a similar scheduled AsyncCall*/ |
1684 | // for (c = fd_table[fd].closeHandler; c; c = c->next) | |
1685 | // assert(c->handler != handler || c->data != data); | |
62e76326 | 1686 | |
b0469965 | 1687 | call->setNext(fd_table[fd].closeHandler); |
62e76326 | 1688 | |
b0469965 | 1689 | fd_table[fd].closeHandler = call; |
30a4f2a8 | 1690 | } |
1691 | ||
b0469965 | 1692 | |
1693 | // remove function-based close handler | |
b8d8561b | 1694 | void |
582b6456 | 1695 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 1696 | { |
b0469965 | 1697 | assert (isOpen(fd)); |
30a4f2a8 | 1698 | /* Find handler in list */ |
bf8fe701 | 1699 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1700 | handler << ", data=" << data); | |
62e76326 | 1701 | |
b0469965 | 1702 | AsyncCall::Pointer p; |
1703 | for (p = fd_table[fd].closeHandler; p != NULL; p = p->Next()){ | |
1704 | typedef CommCbFunPtrCallT<CommCloseCbPtrFun> Call; | |
1705 | const Call *call = dynamic_cast<const Call*>(p.getRaw()); | |
1706 | if (!call) // method callbacks have their own comm_remove_close_handler | |
1707 | continue; | |
62e76326 | 1708 | |
b0469965 | 1709 | typedef CommCloseCbParams Params; |
1710 | const Params ¶ms = GetCommParams<Params>(p); | |
1711 | if (call->dialer.handler == handler && params.data == data) | |
1712 | break; /* This is our handler */ | |
1713 | } | |
f88211e8 | 1714 | assert(p != NULL); |
b0469965 | 1715 | p->cancel("comm_remove_close_handler"); |
1716 | } | |
62e76326 | 1717 | |
b0469965 | 1718 | // remove method-based close handler |
1719 | void | |
1720 | comm_remove_close_handler(int fd, AsyncCall::Pointer &call) | |
1721 | { | |
1722 | assert (isOpen(fd)); | |
1723 | /* Find handler in list */ | |
1724 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1725 | |
b0469965 | 1726 | // Check to see if really exist the given AsyncCall in comm_close handlers |
1727 | // TODO: optimize: this slow code is only needed for the assert() below | |
1728 | AsyncCall::Pointer p; | |
1729 | for (p = fd_table[fd].closeHandler; p != NULL && p != call; p = p->Next()); | |
1730 | assert(p == call); | |
62e76326 | 1731 | |
b0469965 | 1732 | call->cancel("comm_remove_close_handler"); |
30a4f2a8 | 1733 | } |
090089c4 | 1734 | |
b8d8561b | 1735 | static void |
1736 | commSetNoLinger(int fd) | |
30a4f2a8 | 1737 | { |
62e76326 | 1738 | |
30a4f2a8 | 1739 | struct linger L; |
090089c4 | 1740 | L.l_onoff = 0; /* off */ |
1741 | L.l_linger = 0; | |
62e76326 | 1742 | |
30a4f2a8 | 1743 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1744 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1745 | |
58a6c186 | 1746 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1747 | } |
1748 | ||
b8d8561b | 1749 | static void |
1750 | commSetReuseAddr(int fd) | |
090089c4 | 1751 | { |
1752 | int on = 1; | |
62e76326 | 1753 | |
30a4f2a8 | 1754 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1755 | debugs(50, 1, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1756 | } |
1757 | ||
b8d8561b | 1758 | static void |
1759 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1760 | { |
1761 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
bf8fe701 | 1762 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1763 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)) < 0) |
1764 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1765 | #ifdef TCP_WINDOW_CLAMP | |
1766 | if (setsockopt(fd, SOL_TCP, TCP_WINDOW_CLAMP, (char *) &size, sizeof(size)) < 0) | |
1767 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1768 | #endif | |
f868539a | 1769 | } |
1770 | ||
b8d8561b | 1771 | int |
1772 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1773 | { |
a50bfe93 | 1774 | #ifndef _SQUID_MSWIN_ |
731e4d49 | 1775 | int flags; |
9e205701 | 1776 | int dummy = 0; |
a50bfe93 | 1777 | #endif |
ec4daaa5 | 1778 | #ifdef _SQUID_WIN32_ |
62e76326 | 1779 | |
b05490a8 | 1780 | int nonblocking = TRUE; |
62e76326 | 1781 | |
629b5f75 | 1782 | #ifdef _SQUID_CYGWIN_ |
1783 | ||
7f6ffd15 | 1784 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1785 | #endif |
1786 | ||
62e76326 | 1787 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1788 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1789 | return COMM_ERROR; |
1790 | } | |
629b5f75 | 1791 | |
1792 | #ifdef _SQUID_CYGWIN_ | |
1793 | ||
7f6ffd15 | 1794 | } else { |
1795 | #endif | |
629b5f75 | 1796 | #endif |
a50bfe93 | 1797 | #ifndef _SQUID_MSWIN_ |
62e76326 | 1798 | |
1799 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1800 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1801 | return COMM_ERROR; |
1802 | } | |
1803 | ||
1804 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1805 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1806 | return COMM_ERROR; |
1807 | } | |
1808 | ||
a50bfe93 | 1809 | #endif |
629b5f75 | 1810 | #ifdef _SQUID_CYGWIN_ |
62e76326 | 1811 | |
090089c4 | 1812 | } |
62e76326 | 1813 | |
7f6ffd15 | 1814 | #endif |
58a6c186 | 1815 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1816 | |
090089c4 | 1817 | return 0; |
1818 | } | |
1819 | ||
7e3ce7b9 | 1820 | int |
1821 | commUnsetNonBlocking(int fd) | |
1822 | { | |
a50bfe93 | 1823 | #ifdef _SQUID_MSWIN_ |
1824 | int nonblocking = FALSE; | |
1825 | ||
1826 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1827 | #else | |
7e3ce7b9 | 1828 | int flags; |
1829 | int dummy = 0; | |
62e76326 | 1830 | |
7e3ce7b9 | 1831 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1832 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1833 | return COMM_ERROR; |
7e3ce7b9 | 1834 | } |
62e76326 | 1835 | |
7e3ce7b9 | 1836 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1837 | #endif |
bf8fe701 | 1838 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1839 | return COMM_ERROR; |
7e3ce7b9 | 1840 | } |
62e76326 | 1841 | |
7e3ce7b9 | 1842 | fd_table[fd].flags.nonblocking = 0; |
1843 | return 0; | |
1844 | } | |
1845 | ||
b8d8561b | 1846 | void |
a50bfe93 | 1847 | commSetCloseOnExec(int fd) { |
3ca60c86 | 1848 | #ifdef FD_CLOEXEC |
731e4d49 | 1849 | int flags; |
7a18b487 | 1850 | int dummy = 0; |
62e76326 | 1851 | |
c7989865 | 1852 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1853 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1854 | return; |
3ca60c86 | 1855 | } |
62e76326 | 1856 | |
24382924 | 1857 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1858 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1859 | |
d6827718 | 1860 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1861 | |
3ca60c86 | 1862 | #endif |
1863 | } | |
1864 | ||
e90100aa | 1865 | #ifdef TCP_NODELAY |
1866 | static void | |
a50bfe93 | 1867 | commSetTcpNoDelay(int fd) { |
e90100aa | 1868 | int on = 1; |
62e76326 | 1869 | |
e90100aa | 1870 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1871 | debugs(50, 1, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1872 | |
d6827718 | 1873 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1874 | } |
62e76326 | 1875 | |
e90100aa | 1876 | #endif |
1877 | ||
b2130d58 | 1878 | void |
1879 | commSetTcpKeepalive(int fd, int idle, int interval, int timeout) | |
1880 | { | |
1881 | int on = 1; | |
1882 | #ifdef TCP_KEEPCNT | |
1883 | if (timeout && interval) { | |
1884 | int count = (timeout + interval - 1) / interval; | |
1885 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &count, sizeof(on)) < 0) | |
e680134c | 1886 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1887 | } |
1888 | #endif | |
1889 | #ifdef TCP_KEEPIDLE | |
1890 | if (idle) { | |
1891 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(on)) < 0) | |
e680134c | 1892 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1893 | } |
1894 | #endif | |
1895 | #ifdef TCP_KEEPINTVL | |
1896 | if (interval) { | |
1897 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval, sizeof(on)) < 0) | |
e680134c | 1898 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1899 | } |
1900 | #endif | |
1901 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) < 0) | |
e680134c | 1902 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1903 | } |
6a988308 | 1904 | |
d86b3703 | 1905 | void |
a50bfe93 | 1906 | comm_init(void) { |
c4b7a5a9 | 1907 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1908 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1909 | |
b0469965 | 1910 | fdc_table = new AcceptFD[Squid_MaxFD]; |
2b663917 | 1911 | for (int pos = 0; pos < Squid_MaxFD; ++pos) { |
b0469965 | 1912 | fdc_table[pos] = AcceptFD(pos); |
2b663917 | 1913 | } |
b0469965 | 1914 | |
1915 | commfd_table = (comm_fd_t *) xcalloc(Squid_MaxFD, sizeof(comm_fd_t)); | |
2b663917 | 1916 | for (int pos = 0; pos < Squid_MaxFD; pos++) { |
1917 | commfd_table[pos].fd = pos; | |
1918 | commfd_table[pos].readcb.fd = pos; | |
1919 | commfd_table[pos].readcb.type = IOCB_READ; | |
1920 | commfd_table[pos].writecb.fd = pos; | |
1921 | commfd_table[pos].writecb.type = IOCB_WRITE; | |
1922 | } | |
2d8c0b1a | 1923 | |
59c4d35b | 1924 | /* XXX account fd_table */ |
090089c4 | 1925 | /* Keep a few file descriptors free so that we don't run out of FD's |
1926 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1927 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
0254ee29 | 1928 | RESERVED_FD = XMIN(100, Squid_MaxFD / 4); |
2d8c0b1a | 1929 | |
04eb0689 | 1930 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
090089c4 | 1931 | } |
1932 | ||
236d1779 | 1933 | void |
1934 | comm_exit(void) { | |
1935 | safe_free(fd_table); | |
1936 | safe_free(fdd_table); | |
1937 | if (fdc_table) { | |
1938 | delete[] fdc_table; | |
1939 | fdc_table = NULL; | |
1940 | } | |
1941 | safe_free(commfd_table); | |
1942 | } | |
1943 | ||
30a4f2a8 | 1944 | /* Write to FD. */ |
b8d8561b | 1945 | static void |
a50bfe93 | 1946 | commHandleWrite(int fd, void *data) { |
2b663917 | 1947 | comm_io_callback_t *state = (comm_io_callback_t *)data; |
30a4f2a8 | 1948 | int len = 0; |
1949 | int nleft; | |
1950 | ||
2b663917 | 1951 | assert(state == COMMIO_FD_WRITECB(fd)); |
1952 | ||
88bfe092 | 1953 | PROF_start(commHandleWrite); |
bf8fe701 | 1954 | debugs(5, 5, "commHandleWrite: FD " << fd << ": off " << |
1955 | (long int) state->offset << ", sz " << (long int) state->size << "."); | |
30a4f2a8 | 1956 | |
1957 | nleft = state->size - state->offset; | |
1f7c9178 | 1958 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
bf8fe701 | 1959 | debugs(5, 5, "commHandleWrite: write() returns " << len); |
b69f7771 | 1960 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 1961 | statCounter.syscalls.sock.writes++; |
30a4f2a8 | 1962 | |
1963 | if (len == 0) { | |
62e76326 | 1964 | /* Note we even call write if nleft == 0 */ |
1965 | /* We're done */ | |
1966 | ||
1967 | if (nleft != 0) | |
bf8fe701 | 1968 | debugs(5, 1, "commHandleWrite: FD " << fd << ": write failure: connection closed with " << nleft << " bytes remaining."); |
62e76326 | 1969 | |
b0469965 | 1970 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
30a4f2a8 | 1971 | } else if (len < 0) { |
62e76326 | 1972 | /* An error */ |
1973 | ||
1974 | if (fd_table[fd].flags.socket_eof) { | |
bf8fe701 | 1975 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1976 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1977 | } else if (ignoreErrno(errno)) { |
bf8fe701 | 1978 | debugs(50, 10, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
62e76326 | 1979 | commSetSelect(fd, |
1980 | COMM_SELECT_WRITE, | |
1981 | commHandleWrite, | |
1982 | state, | |
1983 | 0); | |
1984 | } else { | |
bf8fe701 | 1985 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1986 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1987 | } |
30a4f2a8 | 1988 | } else { |
62e76326 | 1989 | /* A successful write, continue */ |
1990 | state->offset += len; | |
1991 | ||
57d55dfa | 1992 | if (state->offset < state->size) { |
62e76326 | 1993 | /* Not done, reinstall the write handler and write some more */ |
1994 | commSetSelect(fd, | |
1995 | COMM_SELECT_WRITE, | |
1996 | commHandleWrite, | |
1997 | state, | |
1998 | 0); | |
1999 | } else { | |
b0469965 | 2000 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_OK : COMM_ERROR, errno); |
62e76326 | 2001 | } |
30a4f2a8 | 2002 | } |
62e76326 | 2003 | |
88bfe092 | 2004 | PROF_stop(commHandleWrite); |
30a4f2a8 | 2005 | } |
2006 | ||
7cd8c414 | 2007 | /* |
2008 | * Queue a write. handler/handler_data are called when the write | |
2009 | * completes, on error, or on file descriptor close. | |
2010 | * | |
2011 | * free_func is used to free the passed buffer when the write has completed. | |
2012 | */ | |
b8d8561b | 2013 | void |
2b663917 | 2014 | comm_write(int fd, const char *buf, int size, IOCB * handler, void *handler_data, FREE * free_func) |
b0469965 | 2015 | { |
2016 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommWriteHander", | |
2017 | CommIoCbPtrFun(handler, handler_data)); | |
2018 | ||
2019 | comm_write(fd, buf, size, call, free_func); | |
2020 | } | |
2021 | ||
2022 | void | |
2023 | comm_write(int fd, const char *buf, int size, AsyncCall::Pointer &callback, FREE * free_func) | |
2b663917 | 2024 | { |
82ec8dfc | 2025 | debugs(5, 5, "comm_write: FD " << fd << ": sz " << size << ": asynCall " << callback); |
62e76326 | 2026 | |
82ec8dfc AR |
2027 | /* Make sure we are open, not closing, and not writing */ |
2028 | assert(isOpen(fd)); | |
2029 | assert(!fd_table[fd].closing()); | |
2030 | comm_io_callback_t *ccb = COMMIO_FD_WRITECB(fd); | |
2031 | assert(!ccb->active()); | |
b0469965 | 2032 | |
82ec8dfc AR |
2033 | /* Queue the write */ |
2034 | commio_set_callback(fd, IOCB_WRITE, ccb, callback, | |
2035 | (char *)buf, free_func, size); | |
2036 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, ccb, 0); | |
30a4f2a8 | 2037 | } |
26a880e2 | 2038 | |
b0469965 | 2039 | |
137ee196 | 2040 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 2041 | void |
2b663917 | 2042 | comm_write_mbuf(int fd, MemBuf *mb, IOCB * handler, void *handler_data) { |
2043 | comm_write(fd, mb->buf, mb->size, handler, handler_data, mb->freeFunc()); | |
cb69b4c7 | 2044 | } |
2045 | ||
b0469965 | 2046 | void |
2047 | comm_write_mbuf(int fd, MemBuf *mb, AsyncCall::Pointer &callback) { | |
2048 | comm_write(fd, mb->buf, mb->size, callback, mb->freeFunc()); | |
2049 | } | |
2050 | ||
c4b7a5a9 | 2051 | |
89924214 | 2052 | /* |
2053 | * hm, this might be too general-purpose for all the places we'd | |
2054 | * like to use it. | |
2055 | */ | |
b224ea98 | 2056 | int |
a50bfe93 | 2057 | ignoreErrno(int ierrno) { |
603500e7 | 2058 | switch (ierrno) { |
62e76326 | 2059 | |
89924214 | 2060 | case EINPROGRESS: |
62e76326 | 2061 | |
603500e7 | 2062 | case EWOULDBLOCK: |
26a880e2 | 2063 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 2064 | |
603500e7 | 2065 | case EAGAIN: |
26a880e2 | 2066 | #endif |
62e76326 | 2067 | |
603500e7 | 2068 | case EALREADY: |
62e76326 | 2069 | |
603500e7 | 2070 | case EINTR: |
db494ab8 | 2071 | #ifdef ERESTART |
62e76326 | 2072 | |
db494ab8 | 2073 | case ERESTART: |
2074 | #endif | |
62e76326 | 2075 | |
2076 | return 1; | |
2077 | ||
603500e7 | 2078 | default: |
62e76326 | 2079 | return 0; |
603500e7 | 2080 | } |
62e76326 | 2081 | |
603500e7 | 2082 | /* NOTREACHED */ |
26a880e2 | 2083 | } |
d723bf6b | 2084 | |
2085 | void | |
a50bfe93 | 2086 | commCloseAllSockets(void) { |
d723bf6b | 2087 | int fd; |
2088 | fde *F = NULL; | |
62e76326 | 2089 | |
d723bf6b | 2090 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2091 | F = &fd_table[fd]; |
2092 | ||
2093 | if (!F->flags.open) | |
2094 | continue; | |
2095 | ||
2096 | if (F->type != FD_SOCKET) | |
2097 | continue; | |
2098 | ||
2099 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
2100 | continue; | |
2101 | ||
b0469965 | 2102 | if (F->timeoutHandler != NULL) { |
2103 | AsyncCall::Pointer callback = F->timeoutHandler; | |
2104 | F->timeoutHandler = NULL; | |
bf8fe701 | 2105 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
b0469965 | 2106 | ScheduleCallHere(callback); |
62e76326 | 2107 | } else { |
bf8fe701 | 2108 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_close()"); |
62e76326 | 2109 | comm_close(fd); |
2110 | } | |
d723bf6b | 2111 | } |
2112 | } | |
1b3db6d9 | 2113 | |
2d8c0b1a | 2114 | static bool |
a50bfe93 | 2115 | AlreadyTimedOut(fde *F) { |
2d8c0b1a | 2116 | if (!F->flags.open) |
2117 | return true; | |
2118 | ||
2119 | if (F->timeout == 0) | |
2120 | return true; | |
2121 | ||
2122 | if (F->timeout > squid_curtime) | |
2123 | return true; | |
2124 | ||
2125 | return false; | |
2126 | } | |
2127 | ||
1b3db6d9 | 2128 | void |
a50bfe93 | 2129 | checkTimeouts(void) { |
1b3db6d9 | 2130 | int fd; |
2131 | fde *F = NULL; | |
b0469965 | 2132 | AsyncCall::Pointer callback; |
62e76326 | 2133 | |
1b3db6d9 | 2134 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2135 | F = &fd_table[fd]; |
2136 | ||
2d8c0b1a | 2137 | if (AlreadyTimedOut(F)) |
62e76326 | 2138 | continue; |
2139 | ||
bf8fe701 | 2140 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 2141 | |
b0469965 | 2142 | if (F->timeoutHandler != NULL) { |
bf8fe701 | 2143 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
b0469965 | 2144 | callback = F->timeoutHandler; |
2145 | F->timeoutHandler = NULL; | |
2146 | ScheduleCallHere(callback); | |
62e76326 | 2147 | } else { |
bf8fe701 | 2148 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 2149 | comm_close(fd); |
2150 | } | |
b5443c04 | 2151 | } |
2152 | } | |
2153 | ||
c4b7a5a9 | 2154 | /* |
2155 | * New-style listen and accept routines | |
2156 | * | |
2157 | * Listen simply registers our interest in an FD for listening, | |
2158 | * and accept takes a callback to call when an FD has been | |
2159 | * accept()ed. | |
2160 | */ | |
2161 | int | |
a50bfe93 | 2162 | comm_listen(int sock) { |
c4b7a5a9 | 2163 | int x; |
62e76326 | 2164 | |
c4b7a5a9 | 2165 | if ((x = listen(sock, Squid_MaxFD >> 2)) < 0) { |
bf8fe701 | 2166 | debugs(50, 0, "comm_listen: listen(" << (Squid_MaxFD >> 2) << ", " << sock << "): " << xstrerror()); |
62e76326 | 2167 | return x; |
c4b7a5a9 | 2168 | } |
62e76326 | 2169 | |
0b4d4be5 | 2170 | if (Config.accept_filter && strcmp(Config.accept_filter, "none") != 0) { |
cc9f92d4 | 2171 | #ifdef SO_ACCEPTFILTER |
cc9f92d4 | 2172 | struct accept_filter_arg afa; |
2173 | bzero(&afa, sizeof(afa)); | |
e680134c | 2174 | debugs(5, DBG_CRITICAL, "Installing accept filter '" << Config.accept_filter << "' on FD " << sock); |
cc9f92d4 | 2175 | xstrncpy(afa.af_name, Config.accept_filter, sizeof(afa.af_name)); |
2176 | x = setsockopt(sock, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)); | |
2177 | if (x < 0) | |
0b4d4be5 | 2178 | debugs(5, 0, "SO_ACCEPTFILTER '" << Config.accept_filter << "': '" << xstrerror()); |
2179 | #elif defined(TCP_DEFER_ACCEPT) | |
2180 | int seconds = 30; | |
2181 | if (strncmp(Config.accept_filter, "data=", 5) == 0) | |
2182 | seconds = atoi(Config.accept_filter + 5); | |
2183 | x = setsockopt(sock, IPPROTO_TCP, TCP_DEFER_ACCEPT, &seconds, sizeof(seconds)); | |
2184 | if (x < 0) | |
2185 | debugs(5, 0, "TCP_DEFER_ACCEPT '" << Config.accept_filter << "': '" << xstrerror()); | |
2186 | #else | |
2187 | debugs(5, 0, "accept_filter not supported on your OS"); | |
cc9f92d4 | 2188 | #endif |
0b4d4be5 | 2189 | } |
cc9f92d4 | 2190 | |
c4b7a5a9 | 2191 | return sock; |
2192 | } | |
2193 | ||
2d8c0b1a | 2194 | void |
b0469965 | 2195 | comm_accept(int fd, IOACB *handler, void *handler_data) { |
2196 | debugs(5, 5, "comm_accept: FD " << fd << " handler: " << (void*)handler); | |
2197 | assert(isOpen(fd)); | |
2198 | ||
2199 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommAcceptHandler", | |
2200 | CommAcceptCbPtrFun(handler, handler_data)); | |
2201 | fdc_table[fd].subscribe(call); | |
2d8c0b1a | 2202 | } |
c4b7a5a9 | 2203 | |
b0469965 | 2204 | void |
2205 | comm_accept(int fd, AsyncCall::Pointer &call) { | |
2206 | debugs(5, 5, "comm_accept: FD " << fd << " AsyncCall: " << call); | |
2207 | assert(isOpen(fd)); | |
2208 | ||
2209 | fdc_table[fd].subscribe(call); | |
2d8c0b1a | 2210 | } |
62e76326 | 2211 | |
b0469965 | 2212 | // Called when somebody wants to be notified when our socket accepts new |
2213 | // connection. We do not probe the FD until there is such interest. | |
2d8c0b1a | 2214 | void |
b0469965 | 2215 | AcceptFD::subscribe(AsyncCall::Pointer &call) { |
2216 | /* make sure we're not pending! */ | |
2217 | assert(!theCallback); | |
2218 | theCallback = call; | |
2219 | ||
2220 | #if OPTIMISTIC_IO | |
2221 | mayAcceptMore = true; // even if we failed to accept last time | |
2222 | #endif | |
2223 | ||
2224 | if (mayAcceptMore) | |
2225 | acceptNext(); | |
2226 | else | |
2227 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
2228 | } | |
2229 | ||
2230 | bool | |
2231 | AcceptFD::acceptOne() { | |
c99de607 | 2232 | // If there is no callback and we accept, we will leak the accepted FD. |
2233 | // When we are running out of FDs, there is often no callback. | |
b0469965 | 2234 | if (!theCallback) { |
2235 | debugs(5, 5, "AcceptFD::acceptOne orphaned: FD " << fd); | |
c99de607 | 2236 | // XXX: can we remove this and similar "just in case" calls and |
2237 | // either listen always or listen only when there is a callback? | |
2238 | if (!AcceptLimiter::Instance().deferring()) | |
2239 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
b0469965 | 2240 | return false; |
c99de607 | 2241 | } |
2242 | ||
bdd8c442 | 2243 | /* |
2244 | * We don't worry about running low on FDs here. Instead, | |
2245 | * httpAccept() will use AcceptLimiter if we reach the limit | |
2246 | * there. | |
2247 | */ | |
62e76326 | 2248 | |
2d8c0b1a | 2249 | /* Accept a new connection */ |
b0469965 | 2250 | ConnectionDetail connDetails; |
2251 | int newfd = comm_old_accept(fd, connDetails); | |
62e76326 | 2252 | |
2d8c0b1a | 2253 | /* Check for errors */ |
bdd8c442 | 2254 | |
2d8c0b1a | 2255 | if (newfd < 0) { |
b0469965 | 2256 | assert(theCallback != NULL); |
2257 | ||
2d8c0b1a | 2258 | if (newfd == COMM_NOMESSAGE) { |
2259 | /* register interest again */ | |
10b06767 | 2260 | debugs(5, 5, HERE << "try later: FD " << fd << |
b0469965 | 2261 | " handler: " << *theCallback); |
2d8c0b1a | 2262 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); |
b0469965 | 2263 | return false; |
62e76326 | 2264 | } |
2265 | ||
b0469965 | 2266 | // A non-recoverable error; notify the caller */ |
2267 | notify(-1, COMM_ERROR, errno, connDetails); | |
2268 | return false; | |
2d8c0b1a | 2269 | } |
62e76326 | 2270 | |
b0469965 | 2271 | assert(theCallback != NULL); |
2272 | debugs(5, 5, "AcceptFD::acceptOne accepted: FD " << fd << | |
2273 | " newfd: " << newfd << " from: " << connDetails.peer << | |
2274 | " handler: " << *theCallback); | |
2275 | notify(newfd, COMM_OK, 0, connDetails); | |
2276 | return true; | |
2d8c0b1a | 2277 | } |
62e76326 | 2278 | |
2d8c0b1a | 2279 | void |
b0469965 | 2280 | AcceptFD::acceptNext() { |
2281 | mayAcceptMore = acceptOne(); | |
2d8c0b1a | 2282 | } |
62e76326 | 2283 | |
b0469965 | 2284 | void |
2285 | AcceptFD::notify(int newfd, comm_err_t errcode, int xerrno, const ConnectionDetail &connDetails) | |
2286 | { | |
2287 | if (theCallback != NULL) { | |
2288 | typedef CommAcceptCbParams Params; | |
2289 | Params ¶ms = GetCommParams<Params>(theCallback); | |
2290 | params.fd = fd; | |
2291 | params.nfd = newfd; | |
2292 | params.details = connDetails; | |
2293 | params.flag = errcode; | |
2294 | params.xerrno = xerrno; | |
2295 | ScheduleCallHere(theCallback); | |
2296 | theCallback = NULL; | |
2297 | } | |
c4b7a5a9 | 2298 | } |
2299 | ||
2d8c0b1a | 2300 | /* |
2301 | * This callback is called whenever a filedescriptor is ready | |
2302 | * to dupe itself and fob off an accept()ed connection | |
2303 | */ | |
2304 | static void | |
b0469965 | 2305 | comm_accept_try(int fd, void *) { |
2306 | assert(isOpen(fd)); | |
2307 | fdc_table[fd].acceptNext(); | |
c4b7a5a9 | 2308 | } |
6cce2334 | 2309 | |
a50bfe93 | 2310 | void CommIO::Initialise() { |
6cce2334 | 2311 | /* Initialize done pipe signal */ |
2312 | int DonePipe[2]; | |
1d5da050 | 2313 | if(pipe(DonePipe)) {} |
6cce2334 | 2314 | DoneFD = DonePipe[1]; |
2315 | DoneReadFD = DonePipe[0]; | |
d06925a4 | 2316 | fd_open(DoneReadFD, FD_PIPE, "async-io completetion event: main"); |
2317 | fd_open(DoneFD, FD_PIPE, "async-io completetion event: threads"); | |
2318 | commSetNonBlocking(DoneReadFD); | |
2319 | commSetNonBlocking(DoneFD); | |
2320 | commSetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
6cce2334 | 2321 | Initialised = true; |
2322 | } | |
2323 | ||
d06925a4 | 2324 | void CommIO::NotifyIOClose() { |
2325 | /* Close done pipe signal */ | |
2326 | FlushPipe(); | |
2327 | close(DoneFD); | |
2328 | close(DoneReadFD); | |
2329 | fd_close(DoneFD); | |
2330 | fd_close(DoneReadFD); | |
2331 | Initialised = false; | |
2332 | } | |
2333 | ||
6cce2334 | 2334 | bool CommIO::Initialised = false; |
2335 | bool CommIO::DoneSignalled = false; | |
2336 | int CommIO::DoneFD = -1; | |
2337 | int CommIO::DoneReadFD = -1; | |
2338 | ||
2339 | void | |
a50bfe93 | 2340 | CommIO::FlushPipe() { |
6cce2334 | 2341 | char buf[256]; |
56410c89 | 2342 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); |
6cce2334 | 2343 | } |
2344 | ||
2345 | void | |
a50bfe93 | 2346 | CommIO::NULLFDHandler(int fd, void *data) { |
6cce2334 | 2347 | FlushPipe(); |
2348 | commSetSelect(fd, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
2349 | } | |
2350 | ||
2351 | void | |
a50bfe93 | 2352 | CommIO::ResetNotifications() { |
6cce2334 | 2353 | if (DoneSignalled) { |
62e76326 | 2354 | FlushPipe(); |
2355 | DoneSignalled = false; | |
6cce2334 | 2356 | } |
2357 | } | |
a46d2c0e | 2358 | |
2359 | AcceptLimiter AcceptLimiter::Instance_; | |
2360 | ||
a50bfe93 | 2361 | AcceptLimiter &AcceptLimiter::Instance() { |
a46d2c0e | 2362 | return Instance_; |
2363 | } | |
2364 | ||
c99de607 | 2365 | bool |
2366 | AcceptLimiter::deferring() const { | |
2367 | return deferred.size() > 0; | |
2368 | } | |
2369 | ||
a46d2c0e | 2370 | void |
a50bfe93 | 2371 | AcceptLimiter::defer (int fd, Acceptor::AcceptorFunction *aFunc, void *data) { |
bf8fe701 | 2372 | debugs(5, 5, "AcceptLimiter::defer: FD " << fd << " handler: " << (void*)aFunc); |
a46d2c0e | 2373 | Acceptor temp; |
2374 | temp.theFunction = aFunc; | |
2375 | temp.acceptFD = fd; | |
2376 | temp.theData = data; | |
2377 | deferred.push_back(temp); | |
2378 | } | |
2379 | ||
2380 | void | |
a50bfe93 | 2381 | AcceptLimiter::kick() { |
c99de607 | 2382 | if (!deferring()) |
a46d2c0e | 2383 | return; |
2384 | ||
2385 | /* Yes, this means the first on is the last off.... | |
2386 | * If the list container was a little more friendly, we could sensibly us it. | |
2387 | */ | |
2388 | Acceptor temp = deferred.pop_back(); | |
2389 | ||
2390 | comm_accept (temp.acceptFD, temp.theFunction, temp.theData); | |
2391 | } | |
2392 | ||
82ec8dfc AR |
2393 | /// Start waiting for a possibly half-closed connection to close |
2394 | // by scheduling a read callback to a monitoring handler that | |
2395 | // will close the connection on read errors. | |
a46d2c0e | 2396 | void |
82ec8dfc AR |
2397 | commStartHalfClosedMonitor(int fd) { |
2398 | assert(isOpen(fd)); | |
2399 | assert(!commHasHalfClosedMonitor(fd)); | |
f900210a | 2400 | |
82ec8dfc AR |
2401 | AsyncCall::Pointer call = commCbCall(5,4, "commHalfClosedReader", |
2402 | CommIoCbPtrFun(&commHalfClosedReader, NULL)); | |
2403 | comm_read(fd, NULL, 0, call); | |
f900210a | 2404 | } |
2405 | ||
82ec8dfc AR |
2406 | /// checks whether we are waiting for possibly half-closed connection to close |
2407 | // We are monitoring if the read handler for the fd is the monitoring handler. | |
2408 | bool | |
2409 | commHasHalfClosedMonitor(int fd) { | |
2410 | assert(isOpen(fd)); | |
a46d2c0e | 2411 | |
82ec8dfc AR |
2412 | if (const comm_io_callback_t *cb = COMMIO_FD_READCB(fd)) { |
2413 | AsyncCall::Pointer call = cb->callback; | |
2414 | if (call != NULL) { | |
2415 | // check whether the callback has the right type (it should) | |
2416 | // and uses commHalfClosedReader as the address to call back | |
2417 | typedef CommIoCbPtrFun IoDialer; | |
2418 | if (IoDialer *d = dynamic_cast<IoDialer*>(call->getDialer())) | |
2419 | return d->handler == &commHalfClosedReader; | |
2420 | } | |
a46d2c0e | 2421 | } |
82ec8dfc | 2422 | return false; |
a46d2c0e | 2423 | } |
2424 | ||
82ec8dfc AR |
2425 | /// stop waiting for possibly half-closed connection to close |
2426 | static void | |
2427 | commStopHalfClosedMonitor(int const fd) { | |
2428 | comm_read_cancel(fd, &commHalfClosedReader, NULL); | |
a46d2c0e | 2429 | } |
2430 | ||
82ec8dfc AR |
2431 | /// I/O handler for the possibly half-closed connection monitoring code |
2432 | static void | |
2433 | commHalfClosedReader(int fd, char *, size_t size, comm_err_t flag, int, void *) { | |
2434 | // there cannot be more data coming in on half-closed connections | |
2435 | assert(size == 0); | |
a46d2c0e | 2436 | |
82ec8dfc AR |
2437 | // nothing to do if fd is being closed |
2438 | if (flag == COMM_ERR_CLOSING) | |
2439 | return; | |
a46d2c0e | 2440 | |
82ec8dfc AR |
2441 | // if read failed, close the connection |
2442 | if (flag != COMM_OK) { | |
2443 | debugs(5, 3, "commHalfClosedReader: closing FD " << fd); | |
2444 | comm_close(fd); | |
2445 | return; | |
2446 | } | |
a46d2c0e | 2447 | |
82ec8dfc AR |
2448 | // continue waiting for close or error |
2449 | commStartHalfClosedMonitor(fd); | |
a46d2c0e | 2450 | } |
2451 | ||
a46d2c0e | 2452 | |
b0469965 | 2453 | CommRead::CommRead() : fd(-1), buf(NULL), len(0), callback(NULL) {} |
a46d2c0e | 2454 | |
b0469965 | 2455 | CommRead::CommRead(int fd_, char *buf_, int len_, AsyncCall::Pointer &callback_) |
2456 | : fd(fd_), buf(buf_), len(len_), callback(callback_) {} | |
a46d2c0e | 2457 | |
a50bfe93 | 2458 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 2459 | |
a50bfe93 | 2460 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 2461 | |
a50bfe93 | 2462 | DeferredReadManager::~DeferredReadManager() { |
a46d2c0e | 2463 | flushReads(); |
2464 | assert (deferredReads.empty()); | |
2465 | } | |
2466 | ||
97427e90 | 2467 | /* explicit instantiation required for some systems */ |
2468 | ||
63be0a78 | 2469 | /// \cond AUTODOCS-IGNORE |
2236466c | 2470 | template cbdata_type CbDataList<DeferredRead>::CBDATA_CbDataList; |
63be0a78 | 2471 | /// \endcond |
97427e90 | 2472 | |
a46d2c0e | 2473 | void |
a50bfe93 | 2474 | DeferredReadManager::delayRead(DeferredRead const &aRead) { |
bf8fe701 | 2475 | debugs(5, 3, "Adding deferred read on FD " << aRead.theRead.fd); |
2236466c | 2476 | CbDataList<DeferredRead> *temp = deferredReads.push_back(aRead); |
a46d2c0e | 2477 | comm_add_close_handler (aRead.theRead.fd, CloseHandler, temp); |
2478 | } | |
2479 | ||
2480 | void | |
a50bfe93 | 2481 | DeferredReadManager::CloseHandler(int fd, void *thecbdata) { |
a46d2c0e | 2482 | if (!cbdataReferenceValid (thecbdata)) |
2483 | return; | |
2484 | ||
2236466c | 2485 | CbDataList<DeferredRead> *temp = (CbDataList<DeferredRead> *)thecbdata; |
a46d2c0e | 2486 | |
2487 | temp->element.markCancelled(); | |
2488 | } | |
2489 | ||
2490 | DeferredRead | |
2236466c | 2491 | DeferredReadManager::popHead(CbDataListContainer<DeferredRead> &deferredReads) { |
a46d2c0e | 2492 | assert (!deferredReads.empty()); |
2493 | ||
2494 | if (!deferredReads.head->element.cancelled) | |
2495 | comm_remove_close_handler(deferredReads.head->element.theRead.fd, CloseHandler, deferredReads.head); | |
2496 | ||
2497 | DeferredRead result = deferredReads.pop_front(); | |
2498 | ||
2499 | return result; | |
2500 | } | |
2501 | ||
2502 | void | |
a50bfe93 | 2503 | DeferredReadManager::kickReads(int const count) { |
2236466c | 2504 | /* if we had CbDataList::size() we could consolidate this and flushReads */ |
a46d2c0e | 2505 | |
33cea91c | 2506 | if (count < 1) { |
a46d2c0e | 2507 | flushReads(); |
33cea91c | 2508 | return; |
2509 | } | |
a46d2c0e | 2510 | |
2511 | size_t remaining = count; | |
2512 | ||
2513 | while (!deferredReads.empty() && remaining) { | |
2514 | DeferredRead aRead = popHead(deferredReads); | |
2515 | kickARead(aRead); | |
2516 | ||
2517 | if (!aRead.cancelled) | |
2518 | --remaining; | |
2519 | } | |
2520 | } | |
2521 | ||
2522 | void | |
a50bfe93 | 2523 | DeferredReadManager::flushReads() { |
2236466c | 2524 | CbDataListContainer<DeferredRead> reads; |
a46d2c0e | 2525 | reads = deferredReads; |
2236466c | 2526 | deferredReads = CbDataListContainer<DeferredRead>(); |
a46d2c0e | 2527 | |
2528 | while (!reads.empty()) { | |
2529 | DeferredRead aRead = popHead(reads); | |
2530 | kickARead(aRead); | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | void | |
a50bfe93 | 2535 | DeferredReadManager::kickARead(DeferredRead const &aRead) { |
a46d2c0e | 2536 | if (aRead.cancelled) |
2537 | return; | |
2538 | ||
bf8fe701 | 2539 | debugs(5, 3, "Kicking deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2540 | |
2541 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2542 | } | |
2543 | ||
2544 | void | |
a50bfe93 | 2545 | DeferredRead::markCancelled() { |
a46d2c0e | 2546 | cancelled = true; |
2547 | } | |
2d8c0b1a | 2548 | |
cc192b50 | 2549 | ConnectionDetail::ConnectionDetail() : me(), peer() { |
2d8c0b1a | 2550 | } |
8ff3fa2e | 2551 | |
8ff3fa2e | 2552 | int |
2553 | CommSelectEngine::checkEvents(int timeout) { | |
fa3f745b | 2554 | static time_t last_timeout = 0; |
2555 | ||
2556 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2557 | if (squid_curtime > last_timeout) { | |
2558 | last_timeout = squid_curtime; | |
2559 | checkTimeouts(); | |
2560 | } | |
2561 | ||
8ff3fa2e | 2562 | switch (comm_select(timeout)) { |
2563 | ||
2564 | case COMM_OK: | |
2565 | ||
2566 | case COMM_TIMEOUT: | |
2567 | return 0; | |
2568 | ||
2569 | case COMM_IDLE: | |
2570 | ||
2571 | case COMM_SHUTDOWN: | |
2572 | return EVENT_IDLE; | |
2573 | ||
2574 | case COMM_ERROR: | |
2575 | return EVENT_ERROR; | |
2576 | ||
2577 | default: | |
2578 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2579 | return EVENT_ERROR; | |
2580 | }; | |
2581 | } |