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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" |
090089c4 | 51 | |
b671cc68 | 52 | #if defined(_SQUID_CYGWIN_) |
53 | #include <sys/ioctl.h> | |
54 | #endif | |
30a4f2a8 | 55 | #ifdef HAVE_NETINET_TCP_H |
56 | #include <netinet/tcp.h> | |
57 | #endif | |
090089c4 | 58 | |
2b663917 | 59 | /* |
60 | * New C-like simple comm code. This stuff is a mess and doesn't really buy us anything. | |
61 | */ | |
62 | ||
63 | typedef enum { | |
64 | IOCB_NONE, | |
65 | IOCB_READ, | |
66 | IOCB_WRITE | |
67 | } iocb_type; | |
68 | ||
b0469965 | 69 | struct comm_io_callback_t { |
2b663917 | 70 | iocb_type type; |
71 | int fd; | |
b0469965 | 72 | AsyncCall::Pointer callback; |
2b663917 | 73 | char *buf; |
74 | FREE *freefunc; | |
75 | int size; | |
76 | int offset; | |
2b663917 | 77 | comm_err_t errcode; |
78 | int xerrno; | |
b0469965 | 79 | |
80 | bool active() const { return callback != NULL; } | |
2b663917 | 81 | }; |
2b663917 | 82 | |
83 | struct _comm_fd { | |
84 | int fd; | |
85 | comm_io_callback_t readcb; | |
86 | comm_io_callback_t writecb; | |
87 | }; | |
88 | typedef struct _comm_fd comm_fd_t; | |
89 | comm_fd_t *commfd_table; | |
90 | ||
b0469965 | 91 | // TODO: make this a comm_io_callback_t method? |
2b663917 | 92 | bool |
93 | commio_has_callback(int fd, iocb_type type, comm_io_callback_t *ccb) | |
94 | { | |
95 | assert(ccb->fd == fd); | |
96 | assert(ccb->type == type); | |
b0469965 | 97 | return ccb->active(); |
2b663917 | 98 | } |
99 | ||
100 | /* | |
b0469965 | 101 | * Configure comm_io_callback_t for I/O |
2b663917 | 102 | * |
103 | * @param fd filedescriptor | |
104 | * @param ccb comm io callback | |
105 | * @param cb callback | |
106 | * @param cbdata callback data (must be cbdata'ed) | |
107 | * @param buf buffer, if applicable | |
108 | * @param freefunc freefunc, if applicable | |
109 | * @param size buffer size | |
110 | */ | |
b0469965 | 111 | static void |
112 | commio_set_callback(int fd, iocb_type type, comm_io_callback_t *ccb, | |
113 | AsyncCall::Pointer &cb, char *buf, FREE *freefunc, int size) | |
2b663917 | 114 | { |
b0469965 | 115 | assert(!ccb->active()); |
2b663917 | 116 | assert(ccb->type == type); |
b0469965 | 117 | assert(cb != NULL); |
2b663917 | 118 | ccb->fd = fd; |
119 | ccb->callback = cb; | |
2b663917 | 120 | ccb->buf = buf; |
121 | ccb->freefunc = freefunc; | |
122 | ccb->size = size; | |
2b663917 | 123 | ccb->offset = 0; |
124 | } | |
125 | ||
126 | ||
b0469965 | 127 | // Schedule the callback call and clear the callback |
128 | static void | |
129 | commio_finish_callback(int fd, comm_io_callback_t *ccb, comm_err_t code, int xerrno) | |
2b663917 | 130 | { |
b0469965 | 131 | debugs(5, 3, "commio_finish_callback: called for FD " << fd << " (" << |
132 | code << ", " << xerrno << ")"); | |
133 | assert(ccb->active()); | |
2b663917 | 134 | assert(ccb->fd == fd); |
135 | ccb->errcode = code; | |
136 | ccb->xerrno = xerrno; | |
b0469965 | 137 | |
138 | comm_io_callback_t cb = *ccb; | |
139 | ||
140 | /* We've got a copy; blow away the real one */ | |
141 | /* XXX duplicate code from commio_cancel_callback! */ | |
142 | ccb->xerrno = 0; | |
143 | ccb->callback = NULL; // cb has it | |
144 | ||
145 | /* free data */ | |
146 | if (cb.freefunc) { | |
147 | cb.freefunc(cb.buf); | |
148 | cb.buf = NULL; | |
149 | } | |
150 | ||
151 | if (cb.callback != NULL) { | |
152 | typedef CommIoCbParams Params; | |
153 | Params ¶ms = GetCommParams<Params>(cb.callback); | |
154 | params.fd = cb.fd; | |
155 | params.buf = cb.buf; | |
156 | params.size = cb.offset; | |
157 | params.flag = cb.errcode; | |
158 | params.xerrno = cb.xerrno; | |
159 | ScheduleCallHere(cb.callback); | |
160 | } | |
2b663917 | 161 | } |
162 | ||
163 | ||
164 | /* | |
165 | * Cancel the given callback | |
166 | * | |
167 | * Remember that the data is cbdataRef'ed. | |
168 | */ | |
b0469965 | 169 | // TODO: make this a comm_io_callback_t method |
170 | static void | |
2b663917 | 171 | commio_cancel_callback(int fd, comm_io_callback_t *ccb) |
172 | { | |
b0469965 | 173 | debugs(5, 3, "commio_cancel_callback: called for FD " << fd); |
2b663917 | 174 | assert(ccb->fd == fd); |
b0469965 | 175 | assert(ccb->active()); |
2b663917 | 176 | |
177 | ccb->xerrno = 0; | |
b0469965 | 178 | // delete ccb->callback; |
179 | ccb->callback = NULL; | |
2b663917 | 180 | ccb->callback = NULL; |
2b663917 | 181 | } |
182 | ||
183 | /* | |
184 | * Call the given comm callback; assumes the callback is valid. | |
185 | * | |
186 | * @param ccb io completion callback | |
187 | */ | |
188 | void | |
189 | commio_call_callback(comm_io_callback_t *ccb) | |
190 | { | |
2b663917 | 191 | } |
192 | ||
2d8c0b1a | 193 | class ConnectStateData |
62e76326 | 194 | { |
2d8c0b1a | 195 | |
196 | public: | |
d2d59a68 | 197 | void *operator new (size_t); |
198 | void operator delete (void *); | |
2d8c0b1a | 199 | static void Connect (int fd, void *me); |
200 | void connect(); | |
201 | void callCallback(comm_err_t status, int xerrno); | |
202 | void defaults(); | |
cc192b50 | 203 | |
204 | // defaults given by client | |
f88211e8 | 205 | char *host; |
cc192b50 | 206 | u_short default_port; |
207 | IPAddress default_addr; | |
208 | // NP: CANNOT store the default addr:port together as it gets set/reset differently. | |
62e76326 | 209 | |
cc192b50 | 210 | IPAddress S; |
b0469965 | 211 | AsyncCall::Pointer callback; |
62e76326 | 212 | |
03a1ee42 | 213 | int fd; |
22c653cd | 214 | int tries; |
215 | int addrcount; | |
216 | int connstart; | |
d2d59a68 | 217 | |
218 | private: | |
0b77ecd8 | 219 | int commResetFD(); |
220 | int commRetryConnect(); | |
d2d59a68 | 221 | CBDATA_CLASS(ConnectStateData); |
2d8c0b1a | 222 | }; |
f88211e8 | 223 | |
090089c4 | 224 | /* STATIC */ |
62e76326 | 225 | |
cc192b50 | 226 | static comm_err_t commBind(int s, struct addrinfo &); |
f5b8bbc4 | 227 | static void commSetReuseAddr(int); |
228 | static void commSetNoLinger(int); | |
30a4f2a8 | 229 | #ifdef TCP_NODELAY |
f5b8bbc4 | 230 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 231 | #endif |
f5b8bbc4 | 232 | static void commSetTcpRcvbuf(int, int); |
f88211e8 | 233 | static PF commConnectFree; |
03a1ee42 | 234 | static PF commHandleWrite; |
edeb28fd | 235 | static IPH commConnectDnsHandle; |
723123a9 | 236 | |
3c1a197f | 237 | static PF comm_accept_try; |
c4b7a5a9 | 238 | |
62e76326 | 239 | class AcceptFD |
240 | { | |
241 | ||
242 | public: | |
b0469965 | 243 | AcceptFD(int aFd = -1): fd(aFd), theCallback(0), mayAcceptMore(false) {} |
62e76326 | 244 | |
b0469965 | 245 | void subscribe(AsyncCall::Pointer &call); |
246 | void acceptNext(); | |
247 | void notify(int newfd, comm_err_t, int xerrno, const ConnectionDetail &); | |
62e76326 | 248 | |
2d8c0b1a | 249 | int fd; |
545d554b | 250 | |
b0469965 | 251 | private: |
252 | bool acceptOne(); | |
62e76326 | 253 | |
b0469965 | 254 | AsyncCall::Pointer theCallback; |
255 | bool mayAcceptMore; | |
c4b7a5a9 | 256 | }; |
62e76326 | 257 | |
c4b7a5a9 | 258 | typedef enum { |
62e76326 | 259 | COMM_CB_READ = 1, |
2d8c0b1a | 260 | COMM_CB_DERIVED, |
c4b7a5a9 | 261 | } comm_callback_t; |
262 | ||
62e76326 | 263 | struct _fd_debug_t |
264 | { | |
43ae1d95 | 265 | char const *close_file; |
62e76326 | 266 | int close_line; |
c4b7a5a9 | 267 | }; |
62e76326 | 268 | |
c4b7a5a9 | 269 | typedef struct _fd_debug_t fd_debug_t; |
270 | ||
b001e822 | 271 | static MemAllocator *conn_close_pool = NULL; |
b0469965 | 272 | AcceptFD *fdc_table = NULL; // TODO: rename. And use Vector<>? |
c4b7a5a9 | 273 | fd_debug_t *fdd_table = NULL; |
62e76326 | 274 | |
b0469965 | 275 | static bool |
276 | isOpen(const int fd) | |
b300c36d | 277 | { |
b0469965 | 278 | return fd_table[fd].flags.open != 0; |
b300c36d | 279 | } |
280 | ||
e1a88700 | 281 | /** |
c4b7a5a9 | 282 | * Attempt a read |
283 | * | |
284 | * If the read attempt succeeds or fails, call the callback. | |
285 | * Else, wait for another IO notification. | |
286 | */ | |
2d8c0b1a | 287 | void |
2b663917 | 288 | commHandleRead(int fd, void *data) |
2d8c0b1a | 289 | { |
2b663917 | 290 | comm_io_callback_t *ccb = (comm_io_callback_t *) data; |
291 | ||
292 | assert(data == COMMIO_FD_READCB(fd)); | |
293 | assert(commio_has_callback(fd, IOCB_READ, ccb)); | |
62e76326 | 294 | /* Attempt a read */ |
295 | statCounter.syscalls.sock.reads++; | |
296 | errno = 0; | |
2d8c0b1a | 297 | int retval; |
2b663917 | 298 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 299 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 300 | |
301 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 302 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
2b663917 | 303 | ccb->offset = 0; |
b0469965 | 304 | commio_finish_callback(fd, ccb, COMM_ERROR, errno); |
62e76326 | 305 | return; |
306 | }; | |
307 | ||
308 | /* See if we read anything */ | |
309 | /* Note - read 0 == socket EOF, which is a valid read */ | |
310 | if (retval >= 0) { | |
311 | fd_bytes(fd, retval, FD_READ); | |
b0469965 | 312 | ccb->offset = retval; |
313 | commio_finish_callback(fd, ccb, COMM_OK, errno); | |
62e76326 | 314 | return; |
315 | } | |
c4b7a5a9 | 316 | |
62e76326 | 317 | /* Nope, register for some more IO */ |
2b663917 | 318 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 319 | } |
320 | ||
e1a88700 | 321 | /** |
c4b7a5a9 | 322 | * Queue a read. handler/handler_data are called when the read |
323 | * completes, on error, or on file descriptor close. | |
324 | */ | |
325 | void | |
326 | comm_read(int fd, char *buf, int size, IOCB *handler, void *handler_data) | |
b0469965 | 327 | { |
328 | AsyncCall::Pointer call = commCbCall(5,4, "SomeCommReadHandler", | |
329 | CommIoCbPtrFun(handler, handler_data)); | |
330 | comm_read(fd, buf, size, call); | |
331 | } | |
332 | ||
333 | void | |
334 | comm_read(int fd, char *buf, int size, AsyncCall::Pointer &callback) | |
c4b7a5a9 | 335 | { |
62e76326 | 336 | /* Make sure we're not reading anything and we're not closing */ |
b0469965 | 337 | assert(isOpen(fd)); |
62e76326 | 338 | assert(!fd_table[fd].flags.closing); |
c4b7a5a9 | 339 | |
bf8fe701 | 340 | debugs(5, 4, "comm_read, queueing read for FD " << fd); |
528b2c61 | 341 | |
2b663917 | 342 | /* Queue the read */ |
343 | /* XXX ugly */ | |
b0469965 | 344 | commio_set_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd), |
345 | callback, (char *)buf, NULL, size); | |
2b663917 | 346 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, COMMIO_FD_READCB(fd), 0); |
c4b7a5a9 | 347 | } |
348 | ||
e1a88700 | 349 | /** |
c4b7a5a9 | 350 | * Empty the read buffers |
351 | * | |
352 | * This is a magical routine that empties the read buffers. | |
353 | * Under some platforms (Linux) if a buffer has data in it before | |
354 | * you call close(), the socket will hang and take quite a while | |
355 | * to timeout. | |
356 | */ | |
357 | static void | |
358 | comm_empty_os_read_buffers(int fd) | |
359 | { | |
a42d5c25 | 360 | #ifdef _SQUID_LINUX_ |
c4b7a5a9 | 361 | /* prevent those nasty RST packets */ |
362 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 363 | |
cc192b50 | 364 | if (fd_table[fd].flags.nonblocking == 1) { |
365 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) {}; | |
366 | } | |
c4b7a5a9 | 367 | #endif |
368 | } | |
369 | ||
370 | ||
e1a88700 | 371 | /** |
2b663917 | 372 | * Return whether the FD has a pending completed callback. |
c4b7a5a9 | 373 | */ |
374 | int | |
375 | comm_has_pending_read_callback(int fd) | |
376 | { | |
b0469965 | 377 | assert(isOpen(fd)); |
378 | // XXX: We do not know whether there is a read callback scheduled. | |
379 | // This is used for pconn management that should probably be more | |
380 | // tightly integrated into comm to minimize the chance that a | |
381 | // closing pconn socket will be used for a new transaction. | |
545d554b | 382 | return false; |
c4b7a5a9 | 383 | } |
384 | ||
b0469965 | 385 | // Does comm check this fd for read readiness? |
386 | // Note that when comm is not monitoring, there can be a pending callback | |
387 | // call, which may resume comm monitoring once fired. | |
528b2c61 | 388 | bool |
b0469965 | 389 | comm_monitors_read(int fd) |
c4b7a5a9 | 390 | { |
b0469965 | 391 | assert(isOpen(fd)); |
392 | // Being active is usually the same as monitoring because we always | |
393 | // start monitoring the FD when we configure comm_io_callback_t for I/O | |
394 | // and we usually configure comm_io_callback_t for I/O when we starting | |
395 | // monitoring a FD for reading. TODO: replace with commio_has_callback | |
396 | return COMMIO_FD_READCB(fd)->active(); | |
c4b7a5a9 | 397 | } |
398 | ||
e1a88700 | 399 | /** |
c4b7a5a9 | 400 | * Cancel a pending read. Assert that we have the right parameters, |
401 | * and that there are no pending read events! | |
2b663917 | 402 | * |
b0469965 | 403 | * XXX: We do not assert that there are no pending read events and |
404 | * with async calls it becomes even more difficult. | |
405 | * The whole interface should be reworked to do callback->cancel() | |
406 | * instead of searching for places where the callback may be stored and | |
407 | * updating the state of those places. | |
408 | * | |
2b663917 | 409 | * AHC Don't call the comm handlers? |
c4b7a5a9 | 410 | */ |
411 | void | |
412 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
413 | { | |
b0469965 | 414 | if (!isOpen(fd)) { |
415 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
416 | return; | |
417 | } | |
418 | ||
419 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
420 | // TODO: is "active" == "monitors FD"? | |
421 | if (!cb->active()) { | |
422 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
423 | return; | |
424 | } | |
425 | ||
426 | typedef CommCbFunPtrCallT<CommIoCbPtrFun> Call; | |
427 | Call *call = dynamic_cast<Call*>(cb->callback.getRaw()); | |
428 | if (!call) { | |
429 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " lacks callback"); | |
430 | return; | |
431 | } | |
432 | ||
433 | typedef CommIoCbParams Params; | |
434 | const Params ¶ms = GetCommParams<Params>(cb->callback); | |
c4b7a5a9 | 435 | |
c4b7a5a9 | 436 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
b0469965 | 437 | assert(call->dialer.handler == callback); |
438 | assert(params.data == data); | |
c4b7a5a9 | 439 | |
440 | /* Delete the callback */ | |
b0469965 | 441 | commio_cancel_callback(fd, cb); |
420f2ac8 | 442 | |
443 | /* And the IO event */ | |
62e76326 | 444 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 445 | } |
446 | ||
c4b7a5a9 | 447 | void |
b0469965 | 448 | comm_read_cancel(int fd, AsyncCall::Pointer &callback) |
c4b7a5a9 | 449 | { |
b0469965 | 450 | callback->cancel("comm_read_cancel"); |
451 | ||
452 | if (!isOpen(fd)) { | |
453 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
454 | return; | |
455 | } | |
456 | ||
457 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
458 | ||
459 | if (!cb->active()) { | |
460 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
461 | return; | |
462 | } | |
463 | ||
464 | AsyncCall::Pointer call = cb->callback; | |
465 | assert(call != NULL); // XXX: should never fails (active() checks for callback==NULL) | |
466 | ||
467 | /* Ok, we can be reasonably sure we won't lose any data here! */ | |
468 | assert(call == callback); | |
c4b7a5a9 | 469 | |
b0469965 | 470 | /* Delete the callback */ |
471 | commio_cancel_callback(fd, cb); | |
472 | ||
473 | /* And the IO event */ | |
474 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); | |
c4b7a5a9 | 475 | } |
476 | ||
477 | ||
e1a88700 | 478 | /** |
ce767c23 | 479 | * synchronous wrapper around udp socket functions |
480 | */ | |
ce767c23 | 481 | int |
cc192b50 | 482 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, IPAddress &from) |
ce767c23 | 483 | { |
62e76326 | 484 | statCounter.syscalls.sock.recvfroms++; |
cc192b50 | 485 | int x = 0; |
486 | struct addrinfo *AI = NULL; | |
487 | ||
488 | debugs(5,8, "comm_udp_recvfrom: FD " << fd << " from " << from); | |
489 | ||
490 | assert( NULL == AI ); | |
491 | ||
492 | from.InitAddrInfo(AI); | |
493 | ||
494 | x = recvfrom(fd, buf, len, flags, AI->ai_addr, &AI->ai_addrlen); | |
495 | ||
496 | from = *AI; | |
497 | ||
498 | from.FreeAddrInfo(AI); | |
499 | ||
500 | return x; | |
ce767c23 | 501 | } |
502 | ||
365f12a9 | 503 | int |
7d21986b | 504 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 505 | { |
cc192b50 | 506 | IPAddress nul; |
507 | return comm_udp_recvfrom(fd, buf, len, flags, nul); | |
365f12a9 | 508 | } |
509 | ||
f71da12c | 510 | ssize_t |
7d21986b | 511 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 512 | { |
62e76326 | 513 | return send(s, buf, len, flags); |
f71da12c | 514 | } |
ce767c23 | 515 | |
516 | ||
545d554b | 517 | bool |
518 | comm_has_incomplete_write(int fd) | |
519 | { | |
b0469965 | 520 | assert(isOpen(fd)); |
521 | return COMMIO_FD_WRITECB(fd)->active(); | |
d4cb310b | 522 | } |
523 | ||
e1a88700 | 524 | /** |
cf3c0ee3 | 525 | * Queue a write. handler/handler_data are called when the write fully |
526 | * completes, on error, or on file descriptor close. | |
527 | */ | |
9864ee44 | 528 | |
090089c4 | 529 | /* Return the local port associated with fd. */ |
b8d8561b | 530 | u_short |
531 | comm_local_port(int fd) | |
090089c4 | 532 | { |
cc192b50 | 533 | IPAddress temp; |
534 | struct addrinfo *addr = NULL; | |
76f87348 | 535 | fde *F = &fd_table[fd]; |
090089c4 | 536 | |
090089c4 | 537 | /* If the fd is closed already, just return */ |
62e76326 | 538 | |
60c0b5a2 | 539 | if (!F->flags.open) { |
bf8fe701 | 540 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 541 | return 0; |
090089c4 | 542 | } |
62e76326 | 543 | |
cc192b50 | 544 | if (F->local_addr.GetPort()) |
545 | return F->local_addr.GetPort(); | |
62e76326 | 546 | |
cc192b50 | 547 | temp.InitAddrInfo(addr); |
62e76326 | 548 | |
cc192b50 | 549 | if (getsockname(fd, addr->ai_addr, &(addr->ai_addrlen)) ) { |
bf8fe701 | 550 | debugs(50, 1, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
cc192b50 | 551 | temp.FreeAddrInfo(addr); |
62e76326 | 552 | return 0; |
090089c4 | 553 | } |
cc192b50 | 554 | temp = *addr; |
555 | ||
556 | temp.FreeAddrInfo(addr); | |
557 | ||
558 | F->local_addr.SetPort(temp.GetPort()); | |
559 | ||
560 | // grab default socket information for this address | |
561 | temp.GetAddrInfo(addr); | |
562 | ||
563 | F->sock_family = addr->ai_family; | |
564 | ||
565 | temp.FreeAddrInfo(addr); | |
62e76326 | 566 | |
cc192b50 | 567 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_addr.GetPort()); |
568 | return F->local_addr.GetPort(); | |
090089c4 | 569 | } |
570 | ||
3d7e9d7c | 571 | static comm_err_t |
cc192b50 | 572 | commBind(int s, struct addrinfo &inaddr) |
090089c4 | 573 | { |
83704487 | 574 | statCounter.syscalls.sock.binds++; |
62e76326 | 575 | |
cc192b50 | 576 | if (bind(s, inaddr.ai_addr, inaddr.ai_addrlen) == 0) |
62e76326 | 577 | return COMM_OK; |
578 | ||
cc192b50 | 579 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << fd_table[s].local_addr << ": " << xstrerror()); |
62e76326 | 580 | |
090089c4 | 581 | return COMM_ERROR; |
582 | } | |
583 | ||
e1a88700 | 584 | /** |
585 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
586 | * is OR of flags specified in comm.h. Defaults TOS | |
587 | */ | |
b8d8561b | 588 | int |
16b204c4 | 589 | comm_open(int sock_type, |
62e76326 | 590 | int proto, |
cc192b50 | 591 | IPAddress &addr, |
62e76326 | 592 | int flags, |
593 | const char *note) | |
d6827718 | 594 | { |
cc192b50 | 595 | return comm_openex(sock_type, proto, addr, flags, 0, note); |
d6827718 | 596 | } |
597 | ||
2d8c0b1a | 598 | static bool |
599 | limitError(int const anErrno) | |
600 | { | |
601 | return anErrno == ENFILE || anErrno == EMFILE; | |
602 | } | |
d6827718 | 603 | |
057f5854 | 604 | int |
605 | comm_set_tos(int fd, int tos) | |
606 | { | |
607 | #ifdef IP_TOS | |
608 | int x = setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)); | |
609 | if (x < 0) | |
610 | debugs(50, 1, "comm_set_tos: setsockopt(IP_TOS) on FD " << fd << ": " << xstrerror()); | |
611 | return x; | |
612 | #else | |
e1a88700 | 613 | debugs(50, 0, "WARNING: setsockopt(IP_TOS) not supported on this platform"); |
e343a6ce | 614 | return -1; |
057f5854 | 615 | #endif |
616 | } | |
617 | ||
cc192b50 | 618 | void |
619 | comm_set_v6only(int fd, int tos) | |
620 | { | |
621 | #ifdef IPV6_V6ONLY | |
622 | if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) < 0) { | |
623 | debugs(50, 1, "comm_open: setsockopt(IPV6_V6ONLY) on FD " << fd << ": " << xstrerror()); | |
624 | } | |
625 | #else | |
626 | debugs(50, 0, "WARNING: comm_open: setsockopt(IPV6_V6ONLY) not supported on this platform"); | |
627 | #endif /* sockopt */ | |
628 | } | |
057f5854 | 629 | |
e1a88700 | 630 | /** |
631 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
632 | * is OR of flags specified in defines.h:COMM_* | |
633 | */ | |
d6827718 | 634 | int |
635 | comm_openex(int sock_type, | |
62e76326 | 636 | int proto, |
cc192b50 | 637 | IPAddress &addr, |
62e76326 | 638 | int flags, |
639 | unsigned char TOS, | |
640 | const char *note) | |
090089c4 | 641 | { |
642 | int new_socket; | |
76f87348 | 643 | fde *F = NULL; |
cc192b50 | 644 | int tos = 0; |
645 | struct addrinfo *AI = NULL; | |
090089c4 | 646 | |
88bfe092 | 647 | PROF_start(comm_open); |
090089c4 | 648 | /* Create socket for accepting new connections. */ |
83704487 | 649 | statCounter.syscalls.sock.sockets++; |
62e76326 | 650 | |
cc192b50 | 651 | /* Setup the socket addrinfo details for use */ |
652 | addr.GetAddrInfo(AI); | |
653 | AI->ai_socktype = sock_type; | |
654 | AI->ai_protocol = proto; | |
655 | AI->ai_flags = flags; | |
656 | ||
657 | debugs(50, 3, "comm_openex: Attempt open socket for: " << addr ); | |
658 | ||
659 | if ((new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol)) < 0) | |
62e76326 | 660 | { |
661 | /* Increase the number of reserved fd's if calls to socket() | |
662 | * are failing because the open file table is full. This | |
663 | * limits the number of simultaneous clients */ | |
664 | ||
2d8c0b1a | 665 | if (limitError(errno)) { |
bf8fe701 | 666 | debugs(50, 1, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 667 | fdAdjustReserved(); |
2d8c0b1a | 668 | } else { |
bf8fe701 | 669 | debugs(50, 0, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 670 | } |
671 | ||
cc192b50 | 672 | addr.FreeAddrInfo(AI); |
673 | ||
62e76326 | 674 | PROF_stop(comm_open); |
675 | return -1; | |
090089c4 | 676 | } |
62e76326 | 677 | |
cc192b50 | 678 | debugs(50, 3, "comm_openex: Opened socket FD " << new_socket << " : family=" << AI->ai_family << ", type=" << AI->ai_socktype << ", protocol=" << AI->ai_protocol ); |
679 | ||
d6827718 | 680 | /* set TOS if needed */ |
cc192b50 | 681 | if (TOS && comm_set_tos(new_socket, TOS) ) { |
62e76326 | 682 | tos = TOS; |
cc192b50 | 683 | } |
62e76326 | 684 | |
cc192b50 | 685 | #if IPV6_SPECIAL_SPLITSTACK |
62e76326 | 686 | |
cc192b50 | 687 | if( addr.IsIPv6() ) |
688 | comm_set_v6only(new_socket, tos); | |
62e76326 | 689 | |
d6827718 | 690 | #endif |
62e76326 | 691 | |
cc192b50 | 692 | #if IPV6_SPECIAL_V4MAPPED && defined(_SQUID_MSWIN_) |
693 | ||
694 | /* Windows Vista supports Dual-Sockets. BUT defaults them to V6ONLY. Turn it OFF. */ | |
695 | if( addr.IsIPv6() ) | |
696 | comm_set_v6only(new_socket, 0); | |
697 | ||
698 | #endif | |
62e76326 | 699 | |
090089c4 | 700 | /* update fdstat */ |
bf8fe701 | 701 | debugs(5, 5, "comm_open: FD " << new_socket << " is a new socket"); |
62e76326 | 702 | |
b0469965 | 703 | assert(!isOpen(new_socket)); |
5c5783a2 | 704 | fd_open(new_socket, FD_SOCKET, note); |
62e76326 | 705 | |
c4b7a5a9 | 706 | fdd_table[new_socket].close_file = NULL; |
62e76326 | 707 | |
c4b7a5a9 | 708 | fdd_table[new_socket].close_line = 0; |
62e76326 | 709 | |
76f87348 | 710 | F = &fd_table[new_socket]; |
62e76326 | 711 | |
d6827718 | 712 | F->local_addr = addr; |
62e76326 | 713 | |
cc192b50 | 714 | F->tos = TOS; |
715 | ||
716 | F->sock_family = AI->ai_family; | |
62e76326 | 717 | |
79a15e0a | 718 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 719 | commSetCloseOnExec(new_socket); |
720 | ||
cdc33f35 | 721 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 722 | commSetReuseAddr(new_socket); |
723 | ||
cc192b50 | 724 | if (addr.GetPort() > (u_short) 0) |
62e76326 | 725 | { |
a50bfe93 | 726 | #ifdef _SQUID_MSWIN_ |
727 | ||
728 | if (sock_type != SOCK_DGRAM) | |
729 | #endif | |
730 | ||
731 | commSetNoLinger(new_socket); | |
62e76326 | 732 | |
733 | if (opt_reuseaddr) | |
734 | commSetReuseAddr(new_socket); | |
090089c4 | 735 | } |
62e76326 | 736 | |
cc192b50 | 737 | if (!addr.IsNoAddr()) |
62e76326 | 738 | { |
cc192b50 | 739 | if (commBind(new_socket, *AI) != COMM_OK) { |
62e76326 | 740 | comm_close(new_socket); |
cc192b50 | 741 | addr.FreeAddrInfo(AI); |
62e76326 | 742 | return -1; |
743 | PROF_stop(comm_open); | |
744 | } | |
23ff6968 | 745 | } |
62e76326 | 746 | |
cc192b50 | 747 | addr.FreeAddrInfo(AI); |
090089c4 | 748 | |
79a15e0a | 749 | if (flags & COMM_NONBLOCKING) |
62e76326 | 750 | if (commSetNonBlocking(new_socket) == COMM_ERROR) |
751 | { | |
752 | return -1; | |
753 | PROF_stop(comm_open); | |
754 | } | |
755 | ||
30a4f2a8 | 756 | #ifdef TCP_NODELAY |
757 | if (sock_type == SOCK_STREAM) | |
62e76326 | 758 | commSetTcpNoDelay(new_socket); |
759 | ||
30a4f2a8 | 760 | #endif |
62e76326 | 761 | |
1241e63e | 762 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 763 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
764 | ||
88bfe092 | 765 | PROF_stop(comm_open); |
62e76326 | 766 | |
090089c4 | 767 | return new_socket; |
768 | } | |
769 | ||
d2d59a68 | 770 | CBDATA_CLASS_INIT(ConnectStateData); |
771 | ||
772 | void * | |
773 | ConnectStateData::operator new (size_t size) | |
774 | { | |
775 | CBDATA_INIT_TYPE(ConnectStateData); | |
776 | return cbdataAlloc(ConnectStateData); | |
777 | } | |
778 | ||
779 | void | |
780 | ConnectStateData::operator delete (void *address) | |
781 | { | |
782 | cbdataFree(address); | |
783 | } | |
784 | ||
b0469965 | 785 | |
786 | ||
e5f6c5c2 | 787 | void |
b0469965 | 788 | commConnectStart(int fd, const char *host, u_short port, AsyncCall::Pointer &cb) |
e924600d | 789 | { |
b0469965 | 790 | debugs(cb->debugSection, cb->debugLevel, "commConnectStart: FD " << fd << |
791 | ", cb " << cb << ", " << host << ":" << port); // TODO: just print *cb | |
792 | ||
28c60158 | 793 | ConnectStateData *cs; |
d2d59a68 | 794 | cs = new ConnectStateData; |
03a1ee42 | 795 | cs->fd = fd; |
e924600d | 796 | cs->host = xstrdup(host); |
cc192b50 | 797 | cs->default_port = port; |
b0469965 | 798 | cs->callback = cb; |
799 | ||
e924600d | 800 | comm_add_close_handler(fd, commConnectFree, cs); |
8407afee | 801 | ipcache_nbgethostbyname(host, commConnectDnsHandle, cs); |
edeb28fd | 802 | } |
803 | ||
b0469965 | 804 | // TODO: Remove this and similar callback registration functions by replacing |
805 | // (callback,data) parameters with an AsyncCall so that we do not have to use | |
806 | // a generic call name and debug level when creating an AsyncCall. This will | |
807 | // also cut the number of callback registration routines in half. | |
808 | void | |
809 | commConnectStart(int fd, const char *host, u_short port, CNCB * callback, void *data) | |
810 | { | |
811 | debugs(5, 5, "commConnectStart: FD " << fd << ", data " << data << ", " << host << ":" << port); | |
812 | AsyncCall::Pointer call = commCbCall(5,3, | |
813 | "SomeCommConnectHandler", CommConnectCbPtrFun(callback, data)); | |
814 | commConnectStart(fd, host, port, call); | |
815 | } | |
816 | ||
edeb28fd | 817 | static void |
03a1ee42 | 818 | commConnectDnsHandle(const ipcache_addrs * ia, void *data) |
edeb28fd | 819 | { |
e6ccf245 | 820 | ConnectStateData *cs = (ConnectStateData *)data; |
62e76326 | 821 | |
edeb28fd | 822 | if (ia == NULL) { |
bf8fe701 | 823 | debugs(5, 3, "commConnectDnsHandle: Unknown host: " << cs->host); |
62e76326 | 824 | |
825 | if (!dns_error_message) { | |
826 | dns_error_message = "Unknown DNS error"; | |
bf8fe701 | 827 | debugs(5, 1, "commConnectDnsHandle: Bad dns_error_message"); |
62e76326 | 828 | } |
829 | ||
830 | assert(dns_error_message != NULL); | |
2d8c0b1a | 831 | cs->callCallback(COMM_ERR_DNS, 0); |
62e76326 | 832 | return; |
edeb28fd | 833 | } |
62e76326 | 834 | |
f076b37b | 835 | assert(ia->cur < ia->count); |
cc192b50 | 836 | |
837 | cs->default_addr = ia->in_addrs[ia->cur]; | |
a12a049a | 838 | |
839 | if (Config.onoff.balance_on_multiple_ip) | |
840 | ipcacheCycleAddr(cs->host, NULL); | |
841 | ||
22c653cd | 842 | cs->addrcount = ia->count; |
a12a049a | 843 | |
22c653cd | 844 | cs->connstart = squid_curtime; |
a12a049a | 845 | |
2d8c0b1a | 846 | cs->connect(); |
e924600d | 847 | } |
848 | ||
2d8c0b1a | 849 | void |
850 | ConnectStateData::callCallback(comm_err_t status, int xerrno) | |
851 | { | |
b0469965 | 852 | debugs(5, 3, "commConnectCallback: FD " << fd); |
bf8fe701 | 853 | |
2d8c0b1a | 854 | comm_remove_close_handler(fd, commConnectFree, this); |
e1b16349 | 855 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 856 | |
b0469965 | 857 | typedef CommConnectCbParams Params; |
858 | Params ¶ms = GetCommParams<Params>(callback); | |
859 | params.fd = fd; | |
860 | params.flag = status; | |
861 | params.xerrno = xerrno; | |
862 | ScheduleCallHere(callback); | |
863 | callback = NULL; | |
62e76326 | 864 | |
744c68f5 | 865 | commConnectFree(fd, this); |
f88211e8 | 866 | } |
867 | ||
e924600d | 868 | static void |
9daca08e | 869 | commConnectFree(int fd, void *data) |
e924600d | 870 | { |
e6ccf245 | 871 | ConnectStateData *cs = (ConnectStateData *)data; |
bf8fe701 | 872 | debugs(5, 3, "commConnectFree: FD " << fd); |
b0469965 | 873 | // delete cs->callback; |
874 | cs->callback = NULL; | |
8407afee | 875 | safe_free(cs->host); |
00d77d6b | 876 | delete cs; |
e924600d | 877 | } |
878 | ||
2d8c0b1a | 879 | static void |
880 | copyFDFlags(int to, fde *F) | |
881 | { | |
882 | if (F->flags.close_on_exec) | |
883 | commSetCloseOnExec(to); | |
884 | ||
885 | if (F->flags.nonblocking) | |
886 | commSetNonBlocking(to); | |
887 | ||
888 | #ifdef TCP_NODELAY | |
889 | ||
890 | if (F->flags.nodelay) | |
891 | commSetTcpNoDelay(to); | |
892 | ||
893 | #endif | |
894 | ||
895 | if (Config.tcpRcvBufsz > 0) | |
896 | commSetTcpRcvbuf(to, Config.tcpRcvBufsz); | |
897 | } | |
898 | ||
22c653cd | 899 | /* Reset FD so that we can connect() again */ |
0b77ecd8 | 900 | int |
901 | ConnectStateData::commResetFD() | |
edeb28fd | 902 | { |
cc192b50 | 903 | struct addrinfo *AI = NULL; |
904 | IPAddress nul; | |
905 | ||
b0469965 | 906 | // XXX: do we have to check this? |
907 | // | |
908 | // if (!cbdataReferenceValid(callback.data)) | |
909 | // return 0; | |
62e76326 | 910 | |
83704487 | 911 | statCounter.syscalls.sock.sockets++; |
62e76326 | 912 | |
cc192b50 | 913 | /* setup a bare-bones addrinfo */ |
914 | nul.GetAddrInfo(AI); | |
915 | ||
916 | int fd2 = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); | |
917 | ||
918 | nul.FreeAddrInfo(AI); | |
62e76326 | 919 | |
edeb28fd | 920 | if (fd2 < 0) { |
bf8fe701 | 921 | debugs(5, 0, "commResetFD: socket: " << xstrerror()); |
62e76326 | 922 | |
923 | if (ENFILE == errno || EMFILE == errno) | |
924 | fdAdjustReserved(); | |
925 | ||
926 | return 0; | |
edeb28fd | 927 | } |
62e76326 | 928 | |
68aa4272 | 929 | #ifdef _SQUID_MSWIN_ |
930 | ||
931 | /* On Windows dup2() can't work correctly on Sockets, the */ | |
932 | /* workaround is to close the destination Socket before call them. */ | |
0b77ecd8 | 933 | close(fd); |
68aa4272 | 934 | |
935 | #endif | |
936 | ||
0b77ecd8 | 937 | if (dup2(fd2, fd) < 0) { |
bf8fe701 | 938 | debugs(5, 0, "commResetFD: dup2: " << xstrerror()); |
62e76326 | 939 | |
940 | if (ENFILE == errno || EMFILE == errno) | |
941 | fdAdjustReserved(); | |
942 | ||
943 | close(fd2); | |
944 | ||
945 | return 0; | |
edeb28fd | 946 | } |
3a5a4930 | 947 | commResetSelect(fd); |
62e76326 | 948 | |
edeb28fd | 949 | close(fd2); |
0b77ecd8 | 950 | fde *F = &fd_table[fd]; |
951 | fd_table[fd].flags.called_connect = 0; | |
09544acc | 952 | /* |
953 | * yuck, this has assumptions about comm_open() arguments for | |
954 | * the original socket | |
955 | */ | |
62e76326 | 956 | |
cc192b50 | 957 | AI = NULL; |
958 | F->local_addr.GetAddrInfo(AI); | |
959 | ||
960 | if (commBind(fd, *AI) != COMM_OK) { | |
bf8fe701 | 961 | debugs(5, 0, "commResetFD: bind: " << xstrerror()); |
cc192b50 | 962 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 963 | return 0; |
09544acc | 964 | } |
cc192b50 | 965 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 966 | |
cc192b50 | 967 | if (F->tos) |
968 | comm_set_tos(fd, F->tos); | |
969 | ||
970 | #if IPV6_SPECIAL_SPLITSTACK | |
971 | ||
972 | if( F->local_addr.IsIPv6() ) | |
973 | comm_set_v6only(fd, F->tos); | |
62e76326 | 974 | |
d6827718 | 975 | #endif |
cc192b50 | 976 | |
0b77ecd8 | 977 | copyFDFlags (fd, F); |
62e76326 | 978 | |
edeb28fd | 979 | return 1; |
980 | } | |
981 | ||
0b77ecd8 | 982 | int |
983 | ConnectStateData::commRetryConnect() | |
22c653cd | 984 | { |
0b77ecd8 | 985 | assert(addrcount > 0); |
62e76326 | 986 | |
0b77ecd8 | 987 | if (addrcount == 1) { |
988 | if (tries >= Config.retry.maxtries) | |
62e76326 | 989 | return 0; |
990 | ||
0b77ecd8 | 991 | if (squid_curtime - connstart > Config.Timeout.connect) |
62e76326 | 992 | return 0; |
22c653cd | 993 | } else { |
0b77ecd8 | 994 | if (tries > addrcount) |
62e76326 | 995 | return 0; |
22c653cd | 996 | } |
62e76326 | 997 | |
0b77ecd8 | 998 | return commResetFD(); |
22c653cd | 999 | } |
1000 | ||
4ed0e075 | 1001 | static void |
1002 | commReconnect(void *data) | |
1003 | { | |
1004 | ConnectStateData *cs = (ConnectStateData *)data; | |
1005 | ipcache_nbgethostbyname(cs->host, commConnectDnsHandle, cs); | |
1006 | } | |
1007 | ||
e924600d | 1008 | /* Connect SOCK to specified DEST_PORT at DEST_HOST. */ |
2d8c0b1a | 1009 | void |
1010 | ConnectStateData::Connect (int fd, void *me) | |
090089c4 | 1011 | { |
2d8c0b1a | 1012 | ConnectStateData *cs = (ConnectStateData *)me; |
1013 | assert (cs->fd == fd); | |
1014 | cs->connect(); | |
1015 | } | |
1016 | ||
1017 | void | |
1018 | ConnectStateData::defaults() | |
1019 | { | |
cc192b50 | 1020 | S = default_addr; |
1021 | S.SetPort(default_port); | |
2d8c0b1a | 1022 | } |
62e76326 | 1023 | |
2d8c0b1a | 1024 | void |
1025 | ConnectStateData::connect() | |
1026 | { | |
cc192b50 | 1027 | if (S.IsAnyAddr()) |
2d8c0b1a | 1028 | defaults(); |
62e76326 | 1029 | |
cc192b50 | 1030 | debugs(5,5, "ConnectSateData::connect: to " << S); |
1031 | ||
1032 | switch (comm_connect_addr(fd, S) ) { | |
62e76326 | 1033 | |
e5f6c5c2 | 1034 | case COMM_INPROGRESS: |
bf8fe701 | 1035 | debugs(5, 5, "ConnectStateData::connect: FD " << fd << ": COMM_INPROGRESS"); |
2d8c0b1a | 1036 | commSetSelect(fd, COMM_SELECT_WRITE, ConnectStateData::Connect, this, 0); |
62e76326 | 1037 | break; |
1038 | ||
e5f6c5c2 | 1039 | case COMM_OK: |
cc192b50 | 1040 | debugs(5, 5, "ConnectStateData::connect: FD " << fd << ": COMM_OK - connected"); |
1041 | ipcacheMarkGoodAddr(host, S); | |
2d8c0b1a | 1042 | callCallback(COMM_OK, 0); |
62e76326 | 1043 | break; |
1044 | ||
e5f6c5c2 | 1045 | default: |
cc192b50 | 1046 | debugs(5, 5, "ConnectStateData::connect: FD " << fd << ": * - try again"); |
2d8c0b1a | 1047 | tries++; |
cc192b50 | 1048 | ipcacheMarkBadAddr(host, S); |
62e76326 | 1049 | |
1050 | if (Config.onoff.test_reachability) | |
cc192b50 | 1051 | netdbDeleteAddrNetwork(S); |
62e76326 | 1052 | |
0b77ecd8 | 1053 | if (commRetryConnect()) { |
4ed0e075 | 1054 | eventAdd("commReconnect", commReconnect, this, this->addrcount == 1 ? 0.05 : 0.0, 0); |
62e76326 | 1055 | } else { |
cc192b50 | 1056 | debugs(5, 5, "ConnectStateData::connect: FD " << fd << ": * - ERR tried too many times already."); |
2d8c0b1a | 1057 | callCallback(COMM_ERR_CONNECT, errno); |
62e76326 | 1058 | } |
090089c4 | 1059 | } |
090089c4 | 1060 | } |
b0469965 | 1061 | /* |
b8d8561b | 1062 | int |
b0469965 | 1063 | commSetTimeout_old(int fd, int timeout, PF * handler, void *data) |
090089c4 | 1064 | { |
bf8fe701 | 1065 | debugs(5, 3, "commSetTimeout: FD " << fd << " timeout " << timeout); |
03eb2f01 | 1066 | assert(fd >= 0); |
1067 | assert(fd < Squid_MaxFD); | |
2d8c0b1a | 1068 | fde *F = &fd_table[fd]; |
60c0b5a2 | 1069 | assert(F->flags.open); |
62e76326 | 1070 | |
5c5783a2 | 1071 | if (timeout < 0) { |
62e76326 | 1072 | cbdataReferenceDone(F->timeout_data); |
1073 | F->timeout_handler = NULL; | |
1074 | F->timeout = 0; | |
5849612f | 1075 | } else { |
62e76326 | 1076 | if (handler) { |
1077 | cbdataReferenceDone(F->timeout_data); | |
1078 | F->timeout_handler = handler; | |
1079 | F->timeout_data = cbdataReference(data); | |
1080 | } | |
1081 | ||
1082 | F->timeout = squid_curtime + (time_t) timeout; | |
30a4f2a8 | 1083 | } |
62e76326 | 1084 | |
a3fa14bf | 1085 | return F->timeout; |
090089c4 | 1086 | } |
b0469965 | 1087 | */ |
1088 | ||
1089 | int | |
1090 | commSetTimeout(int fd, int timeout, PF * handler, void *data) | |
1091 | { | |
1092 | AsyncCall::Pointer call; | |
1093 | debugs(5, 3, "commSetTimeout: FD " << fd << " timeout " << timeout); | |
1094 | if(handler != NULL) | |
1095 | call=commCbCall(5,4, "SomeTimeoutHandler", CommTimeoutCbPtrFun(handler, data)); | |
1096 | else | |
1097 | call = NULL; | |
1098 | return commSetTimeout(fd, timeout, call); | |
1099 | } | |
1100 | ||
1101 | ||
1102 | int commSetTimeout(int fd, int timeout, AsyncCall::Pointer &callback) | |
1103 | { | |
1104 | debugs(5, 3, "commSetTimeout: FD " << fd << " timeout " << timeout); | |
1105 | assert(fd >= 0); | |
1106 | assert(fd < Squid_MaxFD); | |
1107 | fde *F = &fd_table[fd]; | |
1108 | assert(F->flags.open); | |
1109 | ||
1110 | if (timeout < 0) { | |
1111 | F->timeoutHandler = NULL; | |
1112 | F->timeout = 0; | |
1113 | } else { | |
1114 | if (callback != NULL) { | |
1115 | typedef CommTimeoutCbParams Params; | |
1116 | Params ¶ms = GetCommParams<Params>(callback); | |
1117 | params.fd = fd; | |
1118 | F->timeoutHandler = callback; | |
1119 | } | |
1120 | ||
1121 | F->timeout = squid_curtime + (time_t) timeout; | |
1122 | } | |
1123 | ||
1124 | return F->timeout; | |
1125 | ||
1126 | } | |
090089c4 | 1127 | |
b8d8561b | 1128 | int |
cc192b50 | 1129 | comm_connect_addr(int sock, const IPAddress &address) |
090089c4 | 1130 | { |
3d7e9d7c | 1131 | comm_err_t status = COMM_OK; |
76f87348 | 1132 | fde *F = &fd_table[sock]; |
cc192b50 | 1133 | int x = 0; |
b5568a61 | 1134 | int err = 0; |
9689d97c | 1135 | socklen_t errlen; |
0e1a47f0 AJ |
1136 | struct sockaddr_storage sas; |
1137 | socklen_t slen = sizeof(struct sockaddr_storage); | |
88bfe092 | 1138 | PROF_start(comm_connect_addr); |
cc192b50 | 1139 | |
1140 | assert(address.GetPort() != 0); | |
1141 | ||
b0469965 | 1142 | debugs(5, 9, "comm_connect_addr: connecting socket " << sock << " to " << address << " (want family: " << F->sock_family << ")"); |
cc192b50 | 1143 | |
fa2d8a61 | 1144 | memset(&sas, 0, slen); |
0e1a47f0 | 1145 | address.GetSockAddr(sas, F->sock_family); |
cc192b50 | 1146 | |
090089c4 | 1147 | /* Establish connection. */ |
b5568a61 | 1148 | errno = 0; |
62e76326 | 1149 | |
1150 | if (!F->flags.called_connect) | |
1151 | { | |
1152 | F->flags.called_connect = 1; | |
1153 | statCounter.syscalls.sock.connects++; | |
1154 | ||
0e1a47f0 | 1155 | x = connect(sock, (struct sockaddr*)&sas, slen); |
62e76326 | 1156 | |
5a33a66a | 1157 | // XXX: ICAP code refuses callbacks during a pending comm_ call |
1158 | // Async calls development will fix this. | |
1159 | if (x == 0) { | |
1160 | x = -1; | |
1161 | errno = EINPROGRESS; | |
1162 | } | |
1163 | ||
62e76326 | 1164 | if (x < 0) |
cc192b50 | 1165 | { |
1166 | debugs(5,5, "comm_connect_addr: sock=" << sock << ", addrinfo( " << | |
0e1a47f0 AJ |
1167 | ", family=" << sas.ss_family << |
1168 | ", addrlen=" << slen << | |
cc192b50 | 1169 | " )" ); |
1170 | debugs(5, 9, "connect FD " << sock << ": (" << x << ") " << xstrerror()); | |
1171 | debugs(14,9, "connecting to: " << address ); | |
1172 | } | |
62e76326 | 1173 | } else |
1174 | { | |
140e2c0b | 1175 | #if defined(_SQUID_NEWSOS6_) |
62e76326 | 1176 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
1177 | ||
0e1a47f0 | 1178 | connect(sock, (struct sockaddr*)&sas, slen); |
62e76326 | 1179 | |
1180 | if (errno == EINVAL) { | |
1181 | errlen = sizeof(err); | |
1182 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1183 | ||
1184 | if (x >= 0) | |
1185 | errno = x; | |
1186 | } | |
1187 | ||
33ac9442 | 1188 | #else |
62e76326 | 1189 | errlen = sizeof(err); |
1190 | ||
1191 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1192 | ||
1193 | if (x == 0) | |
1194 | errno = err; | |
1195 | ||
b5568a61 | 1196 | #if defined(_SQUID_SOLARIS_) |
62e76326 | 1197 | /* |
1198 | * Solaris 2.4's socket emulation doesn't allow you | |
1199 | * to determine the error from a failed non-blocking | |
1200 | * connect and just returns EPIPE. Create a fake | |
1201 | * error message for connect. -- fenner@parc.xerox.com | |
1202 | */ | |
1203 | if (x < 0 && errno == EPIPE) | |
1204 | errno = ENOTCONN; | |
1205 | ||
33ac9442 | 1206 | #endif |
30a4f2a8 | 1207 | #endif |
62e76326 | 1208 | |
e5f6c5c2 | 1209 | } |
62e76326 | 1210 | |
88bfe092 | 1211 | PROF_stop(comm_connect_addr); |
62e76326 | 1212 | |
b5568a61 | 1213 | if (errno == 0 || errno == EISCONN) |
62e76326 | 1214 | status = COMM_OK; |
b5568a61 | 1215 | else if (ignoreErrno(errno)) |
62e76326 | 1216 | status = COMM_INPROGRESS; |
b5568a61 | 1217 | else |
cc192b50 | 1218 | #if USE_IPV6 |
1219 | if( address.IsIPv4() && F->sock_family == AF_INET6 ) { | |
1220 | ||
1221 | /* failover to trying IPv4-only link if an IPv6 one fails */ | |
1222 | /* to catch the edge case of apps listening on IPv4-localhost */ | |
1223 | F->sock_family = AF_INET; | |
1224 | int res = comm_connect_addr(sock, address); | |
1225 | ||
1226 | /* if that fails too, undo our temporary socktype hack so the repeat works properly. */ | |
1227 | if(res == COMM_ERROR) | |
1228 | F->sock_family = AF_INET6; | |
1229 | ||
1230 | return res; | |
1231 | } | |
1232 | else | |
1233 | #endif | |
62e76326 | 1234 | return COMM_ERROR; |
1235 | ||
cc192b50 | 1236 | address.NtoA(F->ipaddr, MAX_IPSTRLEN); |
62e76326 | 1237 | |
cc192b50 | 1238 | F->remote_port = address.GetPort(); /* remote_port is HS */ |
62e76326 | 1239 | |
1240 | if (status == COMM_OK) | |
1241 | { | |
cc192b50 | 1242 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connected to " << address); |
62e76326 | 1243 | } else if (status == COMM_INPROGRESS) |
1244 | { | |
bf8fe701 | 1245 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 1246 | } |
62e76326 | 1247 | |
090089c4 | 1248 | return status; |
1249 | } | |
1250 | ||
1251 | /* Wait for an incoming connection on FD. FD should be a socket returned | |
1252 | * from comm_listen. */ | |
ee0989f2 | 1253 | static int |
1254 | comm_old_accept(int fd, ConnectionDetail &details) | |
090089c4 | 1255 | { |
88bfe092 | 1256 | PROF_start(comm_accept); |
ee0989f2 | 1257 | statCounter.syscalls.sock.accepts++; |
1258 | int sock; | |
cc192b50 | 1259 | struct addrinfo *gai = NULL; |
1260 | details.me.InitAddrInfo(gai); | |
1261 | ||
1262 | if ((sock = accept(fd, gai->ai_addr, &gai->ai_addrlen)) < 0) { | |
1263 | ||
1264 | details.me.FreeAddrInfo(gai); | |
62e76326 | 1265 | |
62e76326 | 1266 | PROF_stop(comm_accept); |
1267 | ||
1268 | if (ignoreErrno(errno)) | |
1269 | { | |
bf8fe701 | 1270 | debugs(50, 5, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1271 | return COMM_NOMESSAGE; |
1272 | } else if (ENFILE == errno || EMFILE == errno) | |
1273 | { | |
bf8fe701 | 1274 | debugs(50, 3, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1275 | return COMM_ERROR; |
1276 | } else | |
1277 | { | |
bf8fe701 | 1278 | debugs(50, 1, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1279 | return COMM_ERROR; |
1280 | } | |
090089c4 | 1281 | } |
62e76326 | 1282 | |
cc192b50 | 1283 | details.peer = *gai; |
1284 | ||
3be4d5d1 | 1285 | details.me.InitAddrInfo(gai); |
1286 | ||
cc192b50 | 1287 | details.me.SetEmpty(); |
1288 | getsockname(sock, gai->ai_addr, &gai->ai_addrlen); | |
1289 | details.me = *gai; | |
62e76326 | 1290 | |
3ca60c86 | 1291 | commSetCloseOnExec(sock); |
cc192b50 | 1292 | |
090089c4 | 1293 | /* fdstat update */ |
5c5783a2 | 1294 | fd_open(sock, FD_SOCKET, "HTTP Request"); |
c4b7a5a9 | 1295 | fdd_table[sock].close_file = NULL; |
1296 | fdd_table[sock].close_line = 0; | |
ee0989f2 | 1297 | fde *F = &fd_table[sock]; |
cc192b50 | 1298 | details.peer.NtoA(F->ipaddr,MAX_IPSTRLEN); |
1299 | F->remote_port = details.peer.GetPort(); | |
1300 | F->local_addr.SetPort(details.me.GetPort()); | |
3be4d5d1 | 1301 | #if USE_IPV6 |
1302 | F->sock_family = AF_INET; | |
1303 | #else | |
1304 | F->sock_family = details.me.IsIPv4()?AF_INET:AF_INET6; | |
1305 | #endif | |
1306 | details.me.FreeAddrInfo(gai); | |
cc192b50 | 1307 | |
090089c4 | 1308 | commSetNonBlocking(sock); |
cc192b50 | 1309 | |
88bfe092 | 1310 | PROF_stop(comm_accept); |
090089c4 | 1311 | return sock; |
1312 | } | |
1313 | ||
cb201b7e | 1314 | void |
1315 | commCallCloseHandlers(int fd) | |
1316 | { | |
76f87348 | 1317 | fde *F = &fd_table[fd]; |
bf8fe701 | 1318 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 1319 | |
8000a965 | 1320 | while (F->closeHandler != NULL) { |
b0469965 | 1321 | AsyncCall::Pointer call = F->closeHandler; |
1322 | F->closeHandler = call->Next(); | |
1323 | call->setNext(NULL); | |
1324 | // If call is not canceled schedule it for execution else ignore it | |
1325 | if(!call->canceled()){ | |
1326 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << call); | |
1327 | typedef CommCloseCbParams Params; | |
1328 | Params ¶ms = GetCommParams<Params>(call); | |
1329 | params.fd = fd; | |
1330 | ScheduleCallHere(call); | |
1331 | } | |
cb201b7e | 1332 | } |
1333 | } | |
1334 | ||
5492ad1d | 1335 | #if LINGERING_CLOSE |
1336 | static void | |
1337 | commLingerClose(int fd, void *unused) | |
1338 | { | |
1339 | LOCAL_ARRAY(char, buf, 1024); | |
1340 | int n; | |
1f7c9178 | 1341 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 1342 | |
5492ad1d | 1343 | if (n < 0) |
bf8fe701 | 1344 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1345 | |
5492ad1d | 1346 | comm_close(fd); |
1347 | } | |
1348 | ||
1349 | static void | |
1350 | commLingerTimeout(int fd, void *unused) | |
1351 | { | |
bf8fe701 | 1352 | debugs(5, 3, "commLingerTimeout: FD " << fd); |
5492ad1d | 1353 | comm_close(fd); |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Inspired by apache | |
1358 | */ | |
1359 | void | |
1360 | comm_lingering_close(int fd) | |
1361 | { | |
d4c19b39 | 1362 | #if USE_SSL |
62e76326 | 1363 | |
d4c19b39 | 1364 | if (fd_table[fd].ssl) |
62e76326 | 1365 | ssl_shutdown_method(fd); |
1366 | ||
d4c19b39 | 1367 | #endif |
62e76326 | 1368 | |
5492ad1d | 1369 | if (shutdown(fd, 1) < 0) { |
62e76326 | 1370 | comm_close(fd); |
1371 | return; | |
5492ad1d | 1372 | } |
62e76326 | 1373 | |
5492ad1d | 1374 | fd_note(fd, "lingering close"); |
1375 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
1376 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
1377 | } | |
62e76326 | 1378 | |
5492ad1d | 1379 | #endif |
1380 | ||
98264874 | 1381 | /* |
1382 | * enable linger with time of 0 so that when the socket is | |
1383 | * closed, TCP generates a RESET | |
1384 | */ | |
1385 | void | |
1386 | comm_reset_close(int fd) | |
1387 | { | |
62e76326 | 1388 | |
98264874 | 1389 | struct linger L; |
1390 | L.l_onoff = 1; | |
1391 | L.l_linger = 0; | |
62e76326 | 1392 | |
98264874 | 1393 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1394 | debugs(50, 0, "commResetTCPClose: FD " << fd << ": " << xstrerror()); |
62e76326 | 1395 | |
98264874 | 1396 | comm_close(fd); |
1397 | } | |
1398 | ||
2d8c0b1a | 1399 | void |
b0469965 | 1400 | CommRead::doCallback(comm_err_t errcode, int xerrno) |
2d8c0b1a | 1401 | { |
b0469965 | 1402 | if (callback != NULL) { |
1403 | typedef CommIoCbParams Params; | |
1404 | Params ¶ms = GetCommParams<Params>(callback); | |
1405 | params.fd = fd; | |
1406 | params.size = 0; | |
1407 | params.flag = errcode; | |
1408 | params.xerrno = xerrno; | |
1409 | ScheduleCallHere(callback); | |
1410 | callback = NULL; | |
1411 | } | |
2d8c0b1a | 1412 | } |
1413 | ||
b0469965 | 1414 | void |
1415 | comm_close_complete(int fd, void *data) | |
2d8c0b1a | 1416 | { |
b0469965 | 1417 | #if USE_SSL |
1418 | fde *F = &fd_table[fd]; | |
2d8c0b1a | 1419 | |
b0469965 | 1420 | if (F->ssl) { |
1421 | SSL_free(F->ssl); | |
1422 | F->ssl = NULL; | |
1423 | } | |
2d8c0b1a | 1424 | |
b0469965 | 1425 | #endif |
1426 | fd_close(fd); /* update fdstat */ | |
1427 | ||
1428 | close(fd); | |
1429 | ||
1430 | if (AbortChecker::Instance().isMonitoring(fd)) | |
1431 | AbortChecker::Instance().stopMonitoring(fd); | |
1432 | ||
1433 | fdc_table[fd] = AcceptFD(fd); | |
1434 | ||
1435 | statCounter.syscalls.sock.closes++; | |
1436 | ||
1437 | /* When an fd closes, give accept() a chance, if need be */ | |
1438 | ||
1439 | if (fdNFree() >= RESERVED_FD) | |
1440 | AcceptLimiter::Instance().kick(); | |
2d8c0b1a | 1441 | |
2d8c0b1a | 1442 | } |
c4b7a5a9 | 1443 | |
1444 | /* | |
1445 | * Close the socket fd. | |
1446 | * | |
1447 | * + call write handlers with ERR_CLOSING | |
1448 | * + call read handlers with ERR_CLOSING | |
1449 | * + call closing handlers | |
a46d2c0e | 1450 | * |
1451 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a | |
1452 | * DeferredReadManager. | |
c4b7a5a9 | 1453 | */ |
b8d8561b | 1454 | void |
43ae1d95 | 1455 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1456 | { |
76f87348 | 1457 | fde *F = NULL; |
1f7c9178 | 1458 | |
bf8fe701 | 1459 | debugs(5, 5, "comm_close: FD " << fd); |
03eb2f01 | 1460 | assert(fd >= 0); |
1461 | assert(fd < Squid_MaxFD); | |
76f87348 | 1462 | F = &fd_table[fd]; |
c4b7a5a9 | 1463 | fdd_table[fd].close_file = file; |
1464 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1465 | |
58a6c186 | 1466 | if (F->flags.closing) |
62e76326 | 1467 | return; |
1468 | ||
60c0b5a2 | 1469 | if (shutting_down && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1470 | return; |
1471 | ||
60c0b5a2 | 1472 | assert(F->flags.open); |
62e76326 | 1473 | |
c4b7a5a9 | 1474 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
b0469965 | 1475 | assert(isOpen(fd)); |
62e76326 | 1476 | |
76f87348 | 1477 | assert(F->type != FD_FILE); |
62e76326 | 1478 | |
88bfe092 | 1479 | PROF_start(comm_close); |
62e76326 | 1480 | |
58a6c186 | 1481 | F->flags.closing = 1; |
62e76326 | 1482 | |
d4c19b39 | 1483 | #if USE_SSL |
62e76326 | 1484 | |
d4c19b39 | 1485 | if (F->ssl) |
62e76326 | 1486 | ssl_shutdown_method(fd); |
1487 | ||
d4c19b39 | 1488 | #endif |
62e76326 | 1489 | |
fa80a8ef | 1490 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1491 | |
2b663917 | 1492 | /* new-style read/write handler stuff */ |
1493 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { | |
b0469965 | 1494 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1495 | } |
1496 | if (commio_has_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd))) { | |
b0469965 | 1497 | commio_finish_callback(fd, COMMIO_FD_READCB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1498 | } |
2d8c0b1a | 1499 | |
2b663917 | 1500 | /* Do callbacks for read/accept routines, if any */ |
b0469965 | 1501 | fdc_table[fd].notify(-1, COMM_ERR_CLOSING, 0, ConnectionDetail()); |
c4b7a5a9 | 1502 | |
cb201b7e | 1503 | commCallCloseHandlers(fd); |
62e76326 | 1504 | |
781ce8ff | 1505 | if (F->pconn.uses) |
1506 | F->pconn.pool->count(F->pconn.uses); | |
62e76326 | 1507 | |
a7ad6e4e | 1508 | comm_empty_os_read_buffers(fd); |
b0469965 | 1509 | |
62e76326 | 1510 | |
b0469965 | 1511 | AsyncCall::Pointer call=commCbCall(5,4, "comm_close_complete", |
1512 | CommCloseCbPtrFun(comm_close_complete, NULL)); | |
1513 | typedef CommCloseCbParams Params; | |
1514 | Params ¶ms = GetCommParams<Params>(call); | |
1515 | params.fd = fd; | |
1516 | ScheduleCallHere(call); | |
62e76326 | 1517 | |
88bfe092 | 1518 | PROF_stop(comm_close); |
090089c4 | 1519 | } |
1520 | ||
090089c4 | 1521 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1522 | int |
5df61230 | 1523 | comm_udp_sendto(int fd, |
cc192b50 | 1524 | const IPAddress &to_addr, |
62e76326 | 1525 | const void *buf, |
1526 | int len) | |
090089c4 | 1527 | { |
cc192b50 | 1528 | int x = 0; |
1529 | struct addrinfo *AI = NULL; | |
1530 | ||
88bfe092 | 1531 | PROF_start(comm_udp_sendto); |
83704487 | 1532 | statCounter.syscalls.sock.sendtos++; |
62e76326 | 1533 | |
cc192b50 | 1534 | debugs(50, 3, "comm_udp_sendto: Attempt to send UDP packet to " << to_addr << |
1535 | " using FD " << fd << " using Port " << comm_local_port(fd) ); | |
1536 | ||
1537 | /* BUG: something in the above macro appears to occasionally be setting AI to garbage. */ | |
1538 | /* AYJ: 2007-08-27 : or was it because I wasn't then setting 'fd_table[fd].sock_family' to fill properly. */ | |
1539 | assert( NULL == AI ); | |
1540 | ||
1541 | to_addr.GetAddrInfo(AI, fd_table[fd].sock_family); | |
1542 | ||
1543 | x = sendto(fd, buf, len, 0, AI->ai_addr, AI->ai_addrlen); | |
1544 | ||
1545 | to_addr.FreeAddrInfo(AI); | |
1546 | ||
88bfe092 | 1547 | PROF_stop(comm_udp_sendto); |
62e76326 | 1548 | |
2d8c0b1a | 1549 | if (x >= 0) |
1550 | return x; | |
1551 | ||
17d51783 | 1552 | #ifdef _SQUID_LINUX_ |
62e76326 | 1553 | |
2d8c0b1a | 1554 | if (ECONNREFUSED != errno) |
17d51783 | 1555 | #endif |
62e76326 | 1556 | |
cc192b50 | 1557 | debugs(50, 1, "comm_udp_sendto: FD " << fd << ", (family=" << fd_table[fd].sock_family << ") " << to_addr << ": " << xstrerror()); |
62e76326 | 1558 | |
2d8c0b1a | 1559 | return COMM_ERROR; |
090089c4 | 1560 | } |
1561 | ||
b8d8561b | 1562 | void |
582b6456 | 1563 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 1564 | { |
bf8fe701 | 1565 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1566 | handler << ", data=" << data); | |
62e76326 | 1567 | |
b0469965 | 1568 | AsyncCall::Pointer call=commCbCall(5,4, "SomeCloseHandler", |
1569 | CommCloseCbPtrFun(handler, data)); | |
1570 | comm_add_close_handler(fd, call); | |
1571 | } | |
62e76326 | 1572 | |
b0469965 | 1573 | void |
1574 | comm_add_close_handler(int fd, AsyncCall::Pointer &call) | |
1575 | { | |
1576 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1577 | |
b0469965 | 1578 | /*TODO:Check for a similar scheduled AsyncCall*/ |
1579 | // for (c = fd_table[fd].closeHandler; c; c = c->next) | |
1580 | // assert(c->handler != handler || c->data != data); | |
62e76326 | 1581 | |
b0469965 | 1582 | call->setNext(fd_table[fd].closeHandler); |
62e76326 | 1583 | |
b0469965 | 1584 | fd_table[fd].closeHandler = call; |
30a4f2a8 | 1585 | } |
1586 | ||
b0469965 | 1587 | |
1588 | // remove function-based close handler | |
b8d8561b | 1589 | void |
582b6456 | 1590 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 1591 | { |
b0469965 | 1592 | assert (isOpen(fd)); |
30a4f2a8 | 1593 | /* Find handler in list */ |
bf8fe701 | 1594 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1595 | handler << ", data=" << data); | |
62e76326 | 1596 | |
b0469965 | 1597 | AsyncCall::Pointer p; |
1598 | for (p = fd_table[fd].closeHandler; p != NULL; p = p->Next()){ | |
1599 | typedef CommCbFunPtrCallT<CommCloseCbPtrFun> Call; | |
1600 | const Call *call = dynamic_cast<const Call*>(p.getRaw()); | |
1601 | if (!call) // method callbacks have their own comm_remove_close_handler | |
1602 | continue; | |
62e76326 | 1603 | |
b0469965 | 1604 | typedef CommCloseCbParams Params; |
1605 | const Params ¶ms = GetCommParams<Params>(p); | |
1606 | if (call->dialer.handler == handler && params.data == data) | |
1607 | break; /* This is our handler */ | |
1608 | } | |
f88211e8 | 1609 | assert(p != NULL); |
b0469965 | 1610 | p->cancel("comm_remove_close_handler"); |
1611 | } | |
62e76326 | 1612 | |
b0469965 | 1613 | // remove method-based close handler |
1614 | void | |
1615 | comm_remove_close_handler(int fd, AsyncCall::Pointer &call) | |
1616 | { | |
1617 | assert (isOpen(fd)); | |
1618 | /* Find handler in list */ | |
1619 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1620 | |
b0469965 | 1621 | // Check to see if really exist the given AsyncCall in comm_close handlers |
1622 | // TODO: optimize: this slow code is only needed for the assert() below | |
1623 | AsyncCall::Pointer p; | |
1624 | for (p = fd_table[fd].closeHandler; p != NULL && p != call; p = p->Next()); | |
1625 | assert(p == call); | |
62e76326 | 1626 | |
b0469965 | 1627 | call->cancel("comm_remove_close_handler"); |
30a4f2a8 | 1628 | } |
090089c4 | 1629 | |
b8d8561b | 1630 | static void |
1631 | commSetNoLinger(int fd) | |
30a4f2a8 | 1632 | { |
62e76326 | 1633 | |
30a4f2a8 | 1634 | struct linger L; |
090089c4 | 1635 | L.l_onoff = 0; /* off */ |
1636 | L.l_linger = 0; | |
62e76326 | 1637 | |
30a4f2a8 | 1638 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1639 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1640 | |
58a6c186 | 1641 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1642 | } |
1643 | ||
b8d8561b | 1644 | static void |
1645 | commSetReuseAddr(int fd) | |
090089c4 | 1646 | { |
1647 | int on = 1; | |
62e76326 | 1648 | |
30a4f2a8 | 1649 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1650 | debugs(50, 1, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1651 | } |
1652 | ||
b8d8561b | 1653 | static void |
1654 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1655 | { |
1656 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
bf8fe701 | 1657 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1658 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)) < 0) |
1659 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1660 | #ifdef TCP_WINDOW_CLAMP | |
1661 | if (setsockopt(fd, SOL_TCP, TCP_WINDOW_CLAMP, (char *) &size, sizeof(size)) < 0) | |
1662 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1663 | #endif | |
f868539a | 1664 | } |
1665 | ||
b8d8561b | 1666 | int |
1667 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1668 | { |
a50bfe93 | 1669 | #ifndef _SQUID_MSWIN_ |
731e4d49 | 1670 | int flags; |
9e205701 | 1671 | int dummy = 0; |
a50bfe93 | 1672 | #endif |
ec4daaa5 | 1673 | #ifdef _SQUID_WIN32_ |
62e76326 | 1674 | |
b05490a8 | 1675 | int nonblocking = TRUE; |
62e76326 | 1676 | |
629b5f75 | 1677 | #ifdef _SQUID_CYGWIN_ |
1678 | ||
7f6ffd15 | 1679 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1680 | #endif |
1681 | ||
62e76326 | 1682 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1683 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1684 | return COMM_ERROR; |
1685 | } | |
629b5f75 | 1686 | |
1687 | #ifdef _SQUID_CYGWIN_ | |
1688 | ||
7f6ffd15 | 1689 | } else { |
1690 | #endif | |
629b5f75 | 1691 | #endif |
a50bfe93 | 1692 | #ifndef _SQUID_MSWIN_ |
62e76326 | 1693 | |
1694 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1695 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1696 | return COMM_ERROR; |
1697 | } | |
1698 | ||
1699 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1700 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1701 | return COMM_ERROR; |
1702 | } | |
1703 | ||
a50bfe93 | 1704 | #endif |
629b5f75 | 1705 | #ifdef _SQUID_CYGWIN_ |
62e76326 | 1706 | |
090089c4 | 1707 | } |
62e76326 | 1708 | |
7f6ffd15 | 1709 | #endif |
58a6c186 | 1710 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1711 | |
090089c4 | 1712 | return 0; |
1713 | } | |
1714 | ||
7e3ce7b9 | 1715 | int |
1716 | commUnsetNonBlocking(int fd) | |
1717 | { | |
a50bfe93 | 1718 | #ifdef _SQUID_MSWIN_ |
1719 | int nonblocking = FALSE; | |
1720 | ||
1721 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1722 | #else | |
7e3ce7b9 | 1723 | int flags; |
1724 | int dummy = 0; | |
62e76326 | 1725 | |
7e3ce7b9 | 1726 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1727 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1728 | return COMM_ERROR; |
7e3ce7b9 | 1729 | } |
62e76326 | 1730 | |
7e3ce7b9 | 1731 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1732 | #endif |
bf8fe701 | 1733 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1734 | return COMM_ERROR; |
7e3ce7b9 | 1735 | } |
62e76326 | 1736 | |
7e3ce7b9 | 1737 | fd_table[fd].flags.nonblocking = 0; |
1738 | return 0; | |
1739 | } | |
1740 | ||
b8d8561b | 1741 | void |
a50bfe93 | 1742 | commSetCloseOnExec(int fd) { |
3ca60c86 | 1743 | #ifdef FD_CLOEXEC |
731e4d49 | 1744 | int flags; |
7a18b487 | 1745 | int dummy = 0; |
62e76326 | 1746 | |
c7989865 | 1747 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1748 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1749 | return; |
3ca60c86 | 1750 | } |
62e76326 | 1751 | |
24382924 | 1752 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1753 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1754 | |
d6827718 | 1755 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1756 | |
3ca60c86 | 1757 | #endif |
1758 | } | |
1759 | ||
e90100aa | 1760 | #ifdef TCP_NODELAY |
1761 | static void | |
a50bfe93 | 1762 | commSetTcpNoDelay(int fd) { |
e90100aa | 1763 | int on = 1; |
62e76326 | 1764 | |
e90100aa | 1765 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1766 | debugs(50, 1, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1767 | |
d6827718 | 1768 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1769 | } |
62e76326 | 1770 | |
e90100aa | 1771 | #endif |
1772 | ||
b2130d58 | 1773 | void |
1774 | commSetTcpKeepalive(int fd, int idle, int interval, int timeout) | |
1775 | { | |
1776 | int on = 1; | |
1777 | #ifdef TCP_KEEPCNT | |
1778 | if (timeout && interval) { | |
1779 | int count = (timeout + interval - 1) / interval; | |
1780 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &count, sizeof(on)) < 0) | |
1781 | debug(5, 1) ("commSetKeepalive: FD %d: %s\n", fd, xstrerror()); | |
1782 | } | |
1783 | #endif | |
1784 | #ifdef TCP_KEEPIDLE | |
1785 | if (idle) { | |
1786 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(on)) < 0) | |
1787 | debug(5, 1) ("commSetKeepalive: FD %d: %s\n", fd, xstrerror()); | |
1788 | } | |
1789 | #endif | |
1790 | #ifdef TCP_KEEPINTVL | |
1791 | if (interval) { | |
1792 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval, sizeof(on)) < 0) | |
1793 | debug(5, 1) ("commSetKeepalive: FD %d: %s\n", fd, xstrerror()); | |
1794 | } | |
1795 | #endif | |
1796 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) < 0) | |
1797 | debug(5, 1) ("commSetKeepalive: FD %d: %s\n", fd, xstrerror()); | |
1798 | } | |
6a988308 | 1799 | |
d86b3703 | 1800 | void |
a50bfe93 | 1801 | comm_init(void) { |
c4b7a5a9 | 1802 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1803 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1804 | |
b0469965 | 1805 | fdc_table = new AcceptFD[Squid_MaxFD]; |
2b663917 | 1806 | for (int pos = 0; pos < Squid_MaxFD; ++pos) { |
b0469965 | 1807 | fdc_table[pos] = AcceptFD(pos); |
2b663917 | 1808 | } |
b0469965 | 1809 | |
1810 | commfd_table = (comm_fd_t *) xcalloc(Squid_MaxFD, sizeof(comm_fd_t)); | |
2b663917 | 1811 | for (int pos = 0; pos < Squid_MaxFD; pos++) { |
1812 | commfd_table[pos].fd = pos; | |
1813 | commfd_table[pos].readcb.fd = pos; | |
1814 | commfd_table[pos].readcb.type = IOCB_READ; | |
1815 | commfd_table[pos].writecb.fd = pos; | |
1816 | commfd_table[pos].writecb.type = IOCB_WRITE; | |
1817 | } | |
2d8c0b1a | 1818 | |
59c4d35b | 1819 | /* XXX account fd_table */ |
090089c4 | 1820 | /* Keep a few file descriptors free so that we don't run out of FD's |
1821 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1822 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
0254ee29 | 1823 | RESERVED_FD = XMIN(100, Squid_MaxFD / 4); |
2d8c0b1a | 1824 | |
04eb0689 | 1825 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
090089c4 | 1826 | } |
1827 | ||
236d1779 | 1828 | void |
1829 | comm_exit(void) { | |
1830 | safe_free(fd_table); | |
1831 | safe_free(fdd_table); | |
1832 | if (fdc_table) { | |
1833 | delete[] fdc_table; | |
1834 | fdc_table = NULL; | |
1835 | } | |
1836 | safe_free(commfd_table); | |
1837 | } | |
1838 | ||
30a4f2a8 | 1839 | /* Write to FD. */ |
b8d8561b | 1840 | static void |
a50bfe93 | 1841 | commHandleWrite(int fd, void *data) { |
2b663917 | 1842 | comm_io_callback_t *state = (comm_io_callback_t *)data; |
30a4f2a8 | 1843 | int len = 0; |
1844 | int nleft; | |
1845 | ||
2b663917 | 1846 | assert(state == COMMIO_FD_WRITECB(fd)); |
1847 | ||
88bfe092 | 1848 | PROF_start(commHandleWrite); |
bf8fe701 | 1849 | debugs(5, 5, "commHandleWrite: FD " << fd << ": off " << |
1850 | (long int) state->offset << ", sz " << (long int) state->size << "."); | |
30a4f2a8 | 1851 | |
1852 | nleft = state->size - state->offset; | |
1f7c9178 | 1853 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
bf8fe701 | 1854 | debugs(5, 5, "commHandleWrite: write() returns " << len); |
b69f7771 | 1855 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 1856 | statCounter.syscalls.sock.writes++; |
30a4f2a8 | 1857 | |
1858 | if (len == 0) { | |
62e76326 | 1859 | /* Note we even call write if nleft == 0 */ |
1860 | /* We're done */ | |
1861 | ||
1862 | if (nleft != 0) | |
bf8fe701 | 1863 | debugs(5, 1, "commHandleWrite: FD " << fd << ": write failure: connection closed with " << nleft << " bytes remaining."); |
62e76326 | 1864 | |
b0469965 | 1865 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
30a4f2a8 | 1866 | } else if (len < 0) { |
62e76326 | 1867 | /* An error */ |
1868 | ||
1869 | if (fd_table[fd].flags.socket_eof) { | |
bf8fe701 | 1870 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1871 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1872 | } else if (ignoreErrno(errno)) { |
bf8fe701 | 1873 | debugs(50, 10, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
62e76326 | 1874 | commSetSelect(fd, |
1875 | COMM_SELECT_WRITE, | |
1876 | commHandleWrite, | |
1877 | state, | |
1878 | 0); | |
1879 | } else { | |
bf8fe701 | 1880 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1881 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1882 | } |
30a4f2a8 | 1883 | } else { |
62e76326 | 1884 | /* A successful write, continue */ |
1885 | state->offset += len; | |
1886 | ||
57d55dfa | 1887 | if (state->offset < state->size) { |
62e76326 | 1888 | /* Not done, reinstall the write handler and write some more */ |
1889 | commSetSelect(fd, | |
1890 | COMM_SELECT_WRITE, | |
1891 | commHandleWrite, | |
1892 | state, | |
1893 | 0); | |
1894 | } else { | |
b0469965 | 1895 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_OK : COMM_ERROR, errno); |
62e76326 | 1896 | } |
30a4f2a8 | 1897 | } |
62e76326 | 1898 | |
88bfe092 | 1899 | PROF_stop(commHandleWrite); |
30a4f2a8 | 1900 | } |
1901 | ||
7cd8c414 | 1902 | /* |
1903 | * Queue a write. handler/handler_data are called when the write | |
1904 | * completes, on error, or on file descriptor close. | |
1905 | * | |
1906 | * free_func is used to free the passed buffer when the write has completed. | |
1907 | */ | |
b8d8561b | 1908 | void |
2b663917 | 1909 | comm_write(int fd, const char *buf, int size, IOCB * handler, void *handler_data, FREE * free_func) |
b0469965 | 1910 | { |
1911 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommWriteHander", | |
1912 | CommIoCbPtrFun(handler, handler_data)); | |
1913 | ||
1914 | comm_write(fd, buf, size, call, free_func); | |
1915 | } | |
1916 | ||
1917 | void | |
1918 | comm_write(int fd, const char *buf, int size, AsyncCall::Pointer &callback, FREE * free_func) | |
2b663917 | 1919 | { |
c4b7a5a9 | 1920 | assert(!fd_table[fd].flags.closing); |
1921 | ||
b0469965 | 1922 | debugs(5, 5, "comm_write: FD " << fd << ": sz " << size << ": asynCall " << callback << "."); |
62e76326 | 1923 | |
2b663917 | 1924 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { |
dec5db5d | 1925 | /* This means that the write has been scheduled, but has not |
1926 | * triggered yet | |
1927 | */ | |
2b663917 | 1928 | fatalf ("comm_write: fd %d: pending callback!\n", fd); |
6cf028ab | 1929 | } |
b0469965 | 1930 | |
1931 | commio_set_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd), | |
1932 | callback, (char *)buf, free_func, size); | |
2b663917 | 1933 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, COMMIO_FD_WRITECB(fd), 0); |
30a4f2a8 | 1934 | } |
26a880e2 | 1935 | |
b0469965 | 1936 | |
137ee196 | 1937 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 1938 | void |
2b663917 | 1939 | comm_write_mbuf(int fd, MemBuf *mb, IOCB * handler, void *handler_data) { |
1940 | comm_write(fd, mb->buf, mb->size, handler, handler_data, mb->freeFunc()); | |
cb69b4c7 | 1941 | } |
1942 | ||
b0469965 | 1943 | void |
1944 | comm_write_mbuf(int fd, MemBuf *mb, AsyncCall::Pointer &callback) { | |
1945 | comm_write(fd, mb->buf, mb->size, callback, mb->freeFunc()); | |
1946 | } | |
1947 | ||
c4b7a5a9 | 1948 | |
89924214 | 1949 | /* |
1950 | * hm, this might be too general-purpose for all the places we'd | |
1951 | * like to use it. | |
1952 | */ | |
b224ea98 | 1953 | int |
a50bfe93 | 1954 | ignoreErrno(int ierrno) { |
603500e7 | 1955 | switch (ierrno) { |
62e76326 | 1956 | |
89924214 | 1957 | case EINPROGRESS: |
62e76326 | 1958 | |
603500e7 | 1959 | case EWOULDBLOCK: |
26a880e2 | 1960 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 1961 | |
603500e7 | 1962 | case EAGAIN: |
26a880e2 | 1963 | #endif |
62e76326 | 1964 | |
603500e7 | 1965 | case EALREADY: |
62e76326 | 1966 | |
603500e7 | 1967 | case EINTR: |
db494ab8 | 1968 | #ifdef ERESTART |
62e76326 | 1969 | |
db494ab8 | 1970 | case ERESTART: |
1971 | #endif | |
62e76326 | 1972 | |
1973 | return 1; | |
1974 | ||
603500e7 | 1975 | default: |
62e76326 | 1976 | return 0; |
603500e7 | 1977 | } |
62e76326 | 1978 | |
603500e7 | 1979 | /* NOTREACHED */ |
26a880e2 | 1980 | } |
d723bf6b | 1981 | |
1982 | void | |
a50bfe93 | 1983 | commCloseAllSockets(void) { |
d723bf6b | 1984 | int fd; |
1985 | fde *F = NULL; | |
62e76326 | 1986 | |
d723bf6b | 1987 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 1988 | F = &fd_table[fd]; |
1989 | ||
1990 | if (!F->flags.open) | |
1991 | continue; | |
1992 | ||
1993 | if (F->type != FD_SOCKET) | |
1994 | continue; | |
1995 | ||
1996 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
1997 | continue; | |
1998 | ||
b0469965 | 1999 | if (F->timeoutHandler != NULL) { |
2000 | AsyncCall::Pointer callback = F->timeoutHandler; | |
2001 | F->timeoutHandler = NULL; | |
bf8fe701 | 2002 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
b0469965 | 2003 | ScheduleCallHere(callback); |
62e76326 | 2004 | } else { |
bf8fe701 | 2005 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_close()"); |
62e76326 | 2006 | comm_close(fd); |
2007 | } | |
d723bf6b | 2008 | } |
2009 | } | |
1b3db6d9 | 2010 | |
2d8c0b1a | 2011 | static bool |
a50bfe93 | 2012 | AlreadyTimedOut(fde *F) { |
2d8c0b1a | 2013 | if (!F->flags.open) |
2014 | return true; | |
2015 | ||
2016 | if (F->timeout == 0) | |
2017 | return true; | |
2018 | ||
2019 | if (F->timeout > squid_curtime) | |
2020 | return true; | |
2021 | ||
2022 | return false; | |
2023 | } | |
2024 | ||
1b3db6d9 | 2025 | void |
a50bfe93 | 2026 | checkTimeouts(void) { |
1b3db6d9 | 2027 | int fd; |
2028 | fde *F = NULL; | |
b0469965 | 2029 | AsyncCall::Pointer callback; |
62e76326 | 2030 | |
1b3db6d9 | 2031 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2032 | F = &fd_table[fd]; |
2033 | ||
2d8c0b1a | 2034 | if (AlreadyTimedOut(F)) |
62e76326 | 2035 | continue; |
2036 | ||
bf8fe701 | 2037 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 2038 | |
b0469965 | 2039 | if (F->timeoutHandler != NULL) { |
bf8fe701 | 2040 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
b0469965 | 2041 | callback = F->timeoutHandler; |
2042 | F->timeoutHandler = NULL; | |
2043 | ScheduleCallHere(callback); | |
62e76326 | 2044 | } else { |
bf8fe701 | 2045 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 2046 | comm_close(fd); |
2047 | } | |
b5443c04 | 2048 | } |
2049 | } | |
2050 | ||
c4b7a5a9 | 2051 | /* |
2052 | * New-style listen and accept routines | |
2053 | * | |
2054 | * Listen simply registers our interest in an FD for listening, | |
2055 | * and accept takes a callback to call when an FD has been | |
2056 | * accept()ed. | |
2057 | */ | |
2058 | int | |
a50bfe93 | 2059 | comm_listen(int sock) { |
c4b7a5a9 | 2060 | int x; |
62e76326 | 2061 | |
c4b7a5a9 | 2062 | if ((x = listen(sock, Squid_MaxFD >> 2)) < 0) { |
bf8fe701 | 2063 | debugs(50, 0, "comm_listen: listen(" << (Squid_MaxFD >> 2) << ", " << sock << "): " << xstrerror()); |
62e76326 | 2064 | return x; |
c4b7a5a9 | 2065 | } |
62e76326 | 2066 | |
0b4d4be5 | 2067 | if (Config.accept_filter && strcmp(Config.accept_filter, "none") != 0) { |
cc9f92d4 | 2068 | #ifdef SO_ACCEPTFILTER |
cc9f92d4 | 2069 | struct accept_filter_arg afa; |
2070 | bzero(&afa, sizeof(afa)); | |
2071 | debug(5, 0) ("Installing accept filter '%s' on FD %d\n", | |
2072 | Config.accept_filter, sock); | |
2073 | xstrncpy(afa.af_name, Config.accept_filter, sizeof(afa.af_name)); | |
2074 | x = setsockopt(sock, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)); | |
2075 | if (x < 0) | |
0b4d4be5 | 2076 | debugs(5, 0, "SO_ACCEPTFILTER '" << Config.accept_filter << "': '" << xstrerror()); |
2077 | #elif defined(TCP_DEFER_ACCEPT) | |
2078 | int seconds = 30; | |
2079 | if (strncmp(Config.accept_filter, "data=", 5) == 0) | |
2080 | seconds = atoi(Config.accept_filter + 5); | |
2081 | x = setsockopt(sock, IPPROTO_TCP, TCP_DEFER_ACCEPT, &seconds, sizeof(seconds)); | |
2082 | if (x < 0) | |
2083 | debugs(5, 0, "TCP_DEFER_ACCEPT '" << Config.accept_filter << "': '" << xstrerror()); | |
2084 | #else | |
2085 | debugs(5, 0, "accept_filter not supported on your OS"); | |
cc9f92d4 | 2086 | #endif |
0b4d4be5 | 2087 | } |
cc9f92d4 | 2088 | |
c4b7a5a9 | 2089 | return sock; |
2090 | } | |
2091 | ||
b0469965 | 2092 | // AcceptFD::callback() wrapper |
2d8c0b1a | 2093 | void |
b0469965 | 2094 | comm_accept(int fd, IOACB *handler, void *handler_data) { |
2095 | debugs(5, 5, "comm_accept: FD " << fd << " handler: " << (void*)handler); | |
2096 | assert(isOpen(fd)); | |
2097 | ||
2098 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommAcceptHandler", | |
2099 | CommAcceptCbPtrFun(handler, handler_data)); | |
2100 | fdc_table[fd].subscribe(call); | |
2d8c0b1a | 2101 | } |
c4b7a5a9 | 2102 | |
b0469965 | 2103 | void |
2104 | comm_accept(int fd, AsyncCall::Pointer &call) { | |
2105 | debugs(5, 5, "comm_accept: FD " << fd << " AsyncCall: " << call); | |
2106 | assert(isOpen(fd)); | |
2107 | ||
2108 | fdc_table[fd].subscribe(call); | |
2d8c0b1a | 2109 | } |
62e76326 | 2110 | |
b0469965 | 2111 | // Called when somebody wants to be notified when our socket accepts new |
2112 | // connection. We do not probe the FD until there is such interest. | |
2d8c0b1a | 2113 | void |
b0469965 | 2114 | AcceptFD::subscribe(AsyncCall::Pointer &call) { |
2115 | /* make sure we're not pending! */ | |
2116 | assert(!theCallback); | |
2117 | theCallback = call; | |
2118 | ||
2119 | #if OPTIMISTIC_IO | |
2120 | mayAcceptMore = true; // even if we failed to accept last time | |
2121 | #endif | |
2122 | ||
2123 | if (mayAcceptMore) | |
2124 | acceptNext(); | |
2125 | else | |
2126 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
2127 | } | |
2128 | ||
2129 | bool | |
2130 | AcceptFD::acceptOne() { | |
c99de607 | 2131 | // If there is no callback and we accept, we will leak the accepted FD. |
2132 | // When we are running out of FDs, there is often no callback. | |
b0469965 | 2133 | if (!theCallback) { |
2134 | debugs(5, 5, "AcceptFD::acceptOne orphaned: FD " << fd); | |
c99de607 | 2135 | // XXX: can we remove this and similar "just in case" calls and |
2136 | // either listen always or listen only when there is a callback? | |
2137 | if (!AcceptLimiter::Instance().deferring()) | |
2138 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
b0469965 | 2139 | return false; |
c99de607 | 2140 | } |
2141 | ||
bdd8c442 | 2142 | /* |
2143 | * We don't worry about running low on FDs here. Instead, | |
2144 | * httpAccept() will use AcceptLimiter if we reach the limit | |
2145 | * there. | |
2146 | */ | |
62e76326 | 2147 | |
2d8c0b1a | 2148 | /* Accept a new connection */ |
b0469965 | 2149 | ConnectionDetail connDetails; |
2150 | int newfd = comm_old_accept(fd, connDetails); | |
62e76326 | 2151 | |
2d8c0b1a | 2152 | /* Check for errors */ |
bdd8c442 | 2153 | |
2d8c0b1a | 2154 | if (newfd < 0) { |
b0469965 | 2155 | assert(theCallback != NULL); |
2156 | ||
2d8c0b1a | 2157 | if (newfd == COMM_NOMESSAGE) { |
2158 | /* register interest again */ | |
b0469965 | 2159 | debugs(5, 5, "AcceptFD::acceptOne eof: FD " << fd << |
2160 | " handler: " << *theCallback); | |
2d8c0b1a | 2161 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); |
b0469965 | 2162 | return false; |
62e76326 | 2163 | } |
2164 | ||
b0469965 | 2165 | // A non-recoverable error; notify the caller */ |
2166 | notify(-1, COMM_ERROR, errno, connDetails); | |
2167 | return false; | |
2d8c0b1a | 2168 | } |
62e76326 | 2169 | |
b0469965 | 2170 | assert(theCallback != NULL); |
2171 | debugs(5, 5, "AcceptFD::acceptOne accepted: FD " << fd << | |
2172 | " newfd: " << newfd << " from: " << connDetails.peer << | |
2173 | " handler: " << *theCallback); | |
2174 | notify(newfd, COMM_OK, 0, connDetails); | |
2175 | return true; | |
2d8c0b1a | 2176 | } |
62e76326 | 2177 | |
2d8c0b1a | 2178 | void |
b0469965 | 2179 | AcceptFD::acceptNext() { |
2180 | mayAcceptMore = acceptOne(); | |
2d8c0b1a | 2181 | } |
62e76326 | 2182 | |
b0469965 | 2183 | void |
2184 | AcceptFD::notify(int newfd, comm_err_t errcode, int xerrno, const ConnectionDetail &connDetails) | |
2185 | { | |
2186 | if (theCallback != NULL) { | |
2187 | typedef CommAcceptCbParams Params; | |
2188 | Params ¶ms = GetCommParams<Params>(theCallback); | |
2189 | params.fd = fd; | |
2190 | params.nfd = newfd; | |
2191 | params.details = connDetails; | |
2192 | params.flag = errcode; | |
2193 | params.xerrno = xerrno; | |
2194 | ScheduleCallHere(theCallback); | |
2195 | theCallback = NULL; | |
2196 | } | |
c4b7a5a9 | 2197 | } |
2198 | ||
2d8c0b1a | 2199 | /* |
2200 | * This callback is called whenever a filedescriptor is ready | |
2201 | * to dupe itself and fob off an accept()ed connection | |
2202 | */ | |
2203 | static void | |
b0469965 | 2204 | comm_accept_try(int fd, void *) { |
2205 | assert(isOpen(fd)); | |
2206 | fdc_table[fd].acceptNext(); | |
c4b7a5a9 | 2207 | } |
6cce2334 | 2208 | |
a50bfe93 | 2209 | void CommIO::Initialise() { |
6cce2334 | 2210 | /* Initialize done pipe signal */ |
2211 | int DonePipe[2]; | |
2212 | pipe(DonePipe); | |
2213 | DoneFD = DonePipe[1]; | |
2214 | DoneReadFD = DonePipe[0]; | |
d06925a4 | 2215 | fd_open(DoneReadFD, FD_PIPE, "async-io completetion event: main"); |
2216 | fd_open(DoneFD, FD_PIPE, "async-io completetion event: threads"); | |
2217 | commSetNonBlocking(DoneReadFD); | |
2218 | commSetNonBlocking(DoneFD); | |
2219 | commSetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
6cce2334 | 2220 | Initialised = true; |
2221 | } | |
2222 | ||
d06925a4 | 2223 | void CommIO::NotifyIOClose() { |
2224 | /* Close done pipe signal */ | |
2225 | FlushPipe(); | |
2226 | close(DoneFD); | |
2227 | close(DoneReadFD); | |
2228 | fd_close(DoneFD); | |
2229 | fd_close(DoneReadFD); | |
2230 | Initialised = false; | |
2231 | } | |
2232 | ||
6cce2334 | 2233 | bool CommIO::Initialised = false; |
2234 | bool CommIO::DoneSignalled = false; | |
2235 | int CommIO::DoneFD = -1; | |
2236 | int CommIO::DoneReadFD = -1; | |
2237 | ||
2238 | void | |
a50bfe93 | 2239 | CommIO::FlushPipe() { |
6cce2334 | 2240 | char buf[256]; |
56410c89 | 2241 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); |
6cce2334 | 2242 | } |
2243 | ||
2244 | void | |
a50bfe93 | 2245 | CommIO::NULLFDHandler(int fd, void *data) { |
6cce2334 | 2246 | FlushPipe(); |
2247 | commSetSelect(fd, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
2248 | } | |
2249 | ||
2250 | void | |
a50bfe93 | 2251 | CommIO::ResetNotifications() { |
6cce2334 | 2252 | if (DoneSignalled) { |
62e76326 | 2253 | FlushPipe(); |
2254 | DoneSignalled = false; | |
6cce2334 | 2255 | } |
2256 | } | |
a46d2c0e | 2257 | |
2258 | AcceptLimiter AcceptLimiter::Instance_; | |
2259 | ||
a50bfe93 | 2260 | AcceptLimiter &AcceptLimiter::Instance() { |
a46d2c0e | 2261 | return Instance_; |
2262 | } | |
2263 | ||
c99de607 | 2264 | bool |
2265 | AcceptLimiter::deferring() const { | |
2266 | return deferred.size() > 0; | |
2267 | } | |
2268 | ||
a46d2c0e | 2269 | void |
a50bfe93 | 2270 | AcceptLimiter::defer (int fd, Acceptor::AcceptorFunction *aFunc, void *data) { |
bf8fe701 | 2271 | debugs(5, 5, "AcceptLimiter::defer: FD " << fd << " handler: " << (void*)aFunc); |
a46d2c0e | 2272 | Acceptor temp; |
2273 | temp.theFunction = aFunc; | |
2274 | temp.acceptFD = fd; | |
2275 | temp.theData = data; | |
2276 | deferred.push_back(temp); | |
2277 | } | |
2278 | ||
2279 | void | |
a50bfe93 | 2280 | AcceptLimiter::kick() { |
c99de607 | 2281 | if (!deferring()) |
a46d2c0e | 2282 | return; |
2283 | ||
2284 | /* Yes, this means the first on is the last off.... | |
2285 | * If the list container was a little more friendly, we could sensibly us it. | |
2286 | */ | |
2287 | Acceptor temp = deferred.pop_back(); | |
2288 | ||
2289 | comm_accept (temp.acceptFD, temp.theFunction, temp.theData); | |
2290 | } | |
2291 | ||
2292 | void | |
a50bfe93 | 2293 | commMarkHalfClosed(int fd) { |
b0469965 | 2294 | assert (isOpen(fd)); |
a46d2c0e | 2295 | AbortChecker::Instance().monitor(fd); |
a46d2c0e | 2296 | } |
2297 | ||
f900210a | 2298 | int commIsHalfClosed(int fd) { |
b0469965 | 2299 | assert (isOpen(fd)); |
f900210a | 2300 | |
b0469965 | 2301 | return AbortChecker::Instance().isMonitoring(fd); |
f900210a | 2302 | } |
2303 | ||
2304 | void | |
2305 | commCheckHalfClosed(void *data) { | |
2306 | AbortChecker::Instance().doIOLoop(); | |
2307 | eventAdd("commCheckHalfClosed", commCheckHalfClosed, NULL, 1.0, false); | |
2308 | } | |
2309 | ||
a46d2c0e | 2310 | AbortChecker &AbortChecker::Instance() {return Instance_;} |
2311 | ||
2312 | AbortChecker AbortChecker::Instance_; | |
2313 | ||
2314 | void | |
a50bfe93 | 2315 | AbortChecker::AbortCheckReader(int fd, char *, size_t size, comm_err_t flag, int xerrno, void *data) { |
a46d2c0e | 2316 | assert (size == 0); |
2317 | /* sketch: | |
2318 | * if the read is ok and 0, the conn is still open. | |
2319 | * if the read is a fail, close the conn | |
2320 | */ | |
2321 | ||
2322 | if (flag != COMM_OK && flag != COMM_ERR_CLOSING) { | |
bf8fe701 | 2323 | debugs(5, 3, "AbortChecker::AbortCheckReader: FD " << fd << " aborted"); |
a46d2c0e | 2324 | comm_close(fd); |
2325 | } | |
2326 | } | |
2327 | ||
2328 | void | |
a50bfe93 | 2329 | AbortChecker::monitor(int fd) { |
a46d2c0e | 2330 | assert (!contains(fd)); |
2331 | ||
2332 | add | |
2333 | (fd); | |
2334 | ||
bf8fe701 | 2335 | debugs(5, 3, "AbortChecker::monitor: monitoring half closed FD " << fd << " for aborts"); |
a46d2c0e | 2336 | } |
2337 | ||
2338 | void | |
a50bfe93 | 2339 | AbortChecker::stopMonitoring (int fd) { |
a46d2c0e | 2340 | assert (contains (fd)); |
2341 | ||
2342 | remove | |
2343 | (fd); | |
2344 | ||
bf8fe701 | 2345 | debugs(5, 3, "AbortChecker::stopMonitoring: stopped monitoring half closed FD " << fd << " for aborts"); |
a46d2c0e | 2346 | } |
2347 | ||
2348 | #include "splay.h" | |
2349 | void | |
a50bfe93 | 2350 | AbortChecker::doIOLoop() { |
f900210a | 2351 | fds->walk(RemoveCheck, this); |
a46d2c0e | 2352 | fds->walk(AddCheck, this); |
a46d2c0e | 2353 | } |
2354 | ||
2355 | void | |
a50bfe93 | 2356 | AbortChecker::AddCheck (int const &fd, void *data) { |
a46d2c0e | 2357 | AbortChecker *me = (AbortChecker *)data; |
2358 | me->addCheck(fd); | |
2359 | } | |
2360 | ||
2361 | void | |
a50bfe93 | 2362 | AbortChecker::RemoveCheck (int const &fd, void *data) { |
a46d2c0e | 2363 | AbortChecker *me = (AbortChecker *)data; |
2364 | me->removeCheck(fd); | |
2365 | } | |
2366 | ||
2367 | ||
2368 | int | |
a50bfe93 | 2369 | AbortChecker::IntCompare (int const &lhs, int const &rhs) { |
a46d2c0e | 2370 | return lhs - rhs; |
2371 | } | |
2372 | ||
b0469965 | 2373 | bool |
2374 | AbortChecker::isMonitoring(int fd) const { | |
2375 | return contains(fd); | |
2376 | } | |
2377 | ||
a46d2c0e | 2378 | bool |
a50bfe93 | 2379 | AbortChecker::contains (int const fd) const { |
a46d2c0e | 2380 | fds = fds->splay(fd, IntCompare); |
2381 | ||
2382 | if (splayLastResult != 0) | |
2383 | return false; | |
2384 | ||
2385 | return true; | |
2386 | } | |
2387 | ||
2388 | void | |
2389 | ||
2390 | AbortChecker::remove | |
a50bfe93 | 2391 | (int const fd) { |
a46d2c0e | 2392 | |
2393 | fds = fds->remove | |
2394 | (fd, IntCompare); | |
2395 | } | |
2396 | ||
2397 | void | |
2398 | ||
2399 | AbortChecker::add | |
a50bfe93 | 2400 | (int const fd) { |
a46d2c0e | 2401 | fds = fds->insert (fd, IntCompare); |
2402 | } | |
2403 | ||
2404 | void | |
a50bfe93 | 2405 | AbortChecker::addCheck (int const fd) { |
a46d2c0e | 2406 | /* assert comm_is_open (fd); */ |
2407 | comm_read(fd, NULL, 0, AbortCheckReader, NULL); | |
2408 | } | |
2409 | ||
2410 | void | |
a50bfe93 | 2411 | AbortChecker::removeCheck (int const fd) { |
a46d2c0e | 2412 | /* |
2413 | comm_read_cancel(fd, AbortCheckReader, NULL); | |
2414 | */ | |
2415 | } | |
2416 | ||
b0469965 | 2417 | CommRead::CommRead() : fd(-1), buf(NULL), len(0), callback(NULL) {} |
a46d2c0e | 2418 | |
b0469965 | 2419 | CommRead::CommRead(int fd_, char *buf_, int len_, AsyncCall::Pointer &callback_) |
2420 | : fd(fd_), buf(buf_), len(len_), callback(callback_) {} | |
a46d2c0e | 2421 | |
a50bfe93 | 2422 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 2423 | |
a50bfe93 | 2424 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 2425 | |
a50bfe93 | 2426 | DeferredReadManager::~DeferredReadManager() { |
a46d2c0e | 2427 | flushReads(); |
2428 | assert (deferredReads.empty()); | |
2429 | } | |
2430 | ||
97427e90 | 2431 | /* explicit instantiation required for some systems */ |
2432 | ||
63be0a78 | 2433 | /// \cond AUTODOCS-IGNORE |
2434 | template cbdata_type List<DeferredRead>::CBDATA_List; | |
2435 | /// \endcond | |
97427e90 | 2436 | |
a46d2c0e | 2437 | void |
a50bfe93 | 2438 | DeferredReadManager::delayRead(DeferredRead const &aRead) { |
bf8fe701 | 2439 | debugs(5, 3, "Adding deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2440 | List<DeferredRead> *temp = deferredReads.push_back(aRead); |
2441 | comm_add_close_handler (aRead.theRead.fd, CloseHandler, temp); | |
2442 | } | |
2443 | ||
2444 | void | |
a50bfe93 | 2445 | DeferredReadManager::CloseHandler(int fd, void *thecbdata) { |
a46d2c0e | 2446 | if (!cbdataReferenceValid (thecbdata)) |
2447 | return; | |
2448 | ||
2449 | List<DeferredRead> *temp = (List<DeferredRead> *)thecbdata; | |
2450 | ||
2451 | temp->element.markCancelled(); | |
2452 | } | |
2453 | ||
2454 | DeferredRead | |
a50bfe93 | 2455 | DeferredReadManager::popHead(ListContainer<DeferredRead> &deferredReads) { |
a46d2c0e | 2456 | assert (!deferredReads.empty()); |
2457 | ||
2458 | if (!deferredReads.head->element.cancelled) | |
2459 | comm_remove_close_handler(deferredReads.head->element.theRead.fd, CloseHandler, deferredReads.head); | |
2460 | ||
2461 | DeferredRead result = deferredReads.pop_front(); | |
2462 | ||
2463 | return result; | |
2464 | } | |
2465 | ||
2466 | void | |
a50bfe93 | 2467 | DeferredReadManager::kickReads(int const count) { |
a46d2c0e | 2468 | /* if we had List::size() we could consolidate this and flushReads */ |
2469 | ||
33cea91c | 2470 | if (count < 1) { |
a46d2c0e | 2471 | flushReads(); |
33cea91c | 2472 | return; |
2473 | } | |
a46d2c0e | 2474 | |
2475 | size_t remaining = count; | |
2476 | ||
2477 | while (!deferredReads.empty() && remaining) { | |
2478 | DeferredRead aRead = popHead(deferredReads); | |
2479 | kickARead(aRead); | |
2480 | ||
2481 | if (!aRead.cancelled) | |
2482 | --remaining; | |
2483 | } | |
2484 | } | |
2485 | ||
2486 | void | |
a50bfe93 | 2487 | DeferredReadManager::flushReads() { |
a46d2c0e | 2488 | ListContainer<DeferredRead> reads; |
2489 | reads = deferredReads; | |
2490 | deferredReads = ListContainer<DeferredRead>(); | |
2491 | ||
2492 | while (!reads.empty()) { | |
2493 | DeferredRead aRead = popHead(reads); | |
2494 | kickARead(aRead); | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | void | |
a50bfe93 | 2499 | DeferredReadManager::kickARead(DeferredRead const &aRead) { |
a46d2c0e | 2500 | if (aRead.cancelled) |
2501 | return; | |
2502 | ||
bf8fe701 | 2503 | debugs(5, 3, "Kicking deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2504 | |
2505 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2506 | } | |
2507 | ||
2508 | void | |
a50bfe93 | 2509 | DeferredRead::markCancelled() { |
a46d2c0e | 2510 | cancelled = true; |
2511 | } | |
2d8c0b1a | 2512 | |
cc192b50 | 2513 | ConnectionDetail::ConnectionDetail() : me(), peer() { |
2d8c0b1a | 2514 | } |
8ff3fa2e | 2515 | |
8ff3fa2e | 2516 | int |
2517 | CommSelectEngine::checkEvents(int timeout) { | |
fa3f745b | 2518 | static time_t last_timeout = 0; |
2519 | ||
2520 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2521 | if (squid_curtime > last_timeout) { | |
2522 | last_timeout = squid_curtime; | |
2523 | checkTimeouts(); | |
2524 | } | |
2525 | ||
8ff3fa2e | 2526 | switch (comm_select(timeout)) { |
2527 | ||
2528 | case COMM_OK: | |
2529 | ||
2530 | case COMM_TIMEOUT: | |
2531 | return 0; | |
2532 | ||
2533 | case COMM_IDLE: | |
2534 | ||
2535 | case COMM_SHUTDOWN: | |
2536 | return EVENT_IDLE; | |
2537 | ||
2538 | case COMM_ERROR: | |
2539 | return EVENT_ERROR; | |
2540 | ||
2541 | default: | |
2542 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2543 | return EVENT_ERROR; | |
2544 | }; | |
2545 | } |