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30a4f2a8 | 1 | /* |
30a4f2a8 | 2 | * DEBUG: section 5 Socket Functions |
3 | * AUTHOR: Harvest Derived | |
4 | * | |
2b6662ba | 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 6 | * ---------------------------------------------------------- |
30a4f2a8 | 7 | * |
2b6662ba | 8 | * Squid is the result of efforts by numerous individuals from |
9 | * the Internet community; see the CONTRIBUTORS file for full | |
10 | * details. Many organizations have provided support for Squid's | |
11 | * development; see the SPONSORS file for full details. Squid is | |
12 | * Copyrighted (C) 2001 by the Regents of the University of | |
13 | * California; see the COPYRIGHT file for full details. Squid | |
14 | * incorporates software developed and/or copyrighted by other | |
15 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 16 | * |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or | |
20 | * (at your option) any later version. | |
9e008dda | 21 | * |
30a4f2a8 | 22 | * This program is distributed in the hope that it will be useful, |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
9e008dda | 26 | * |
30a4f2a8 | 27 | * You should have received a copy of the GNU General Public License |
28 | * along with this program; if not, write to the Free Software | |
cbdec147 | 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 30 | * |
2d8c0b1a | 31 | * |
32 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
30a4f2a8 | 33 | */ |
090089c4 | 34 | |
44a47c6e | 35 | #include "squid.h" |
c4b7a5a9 | 36 | #include "StoreIOBuffer.h" |
37 | #include "comm.h" | |
a553a5a3 | 38 | #include "event.h" |
528b2c61 | 39 | #include "fde.h" |
56410c89 | 40 | #include "CommIO.h" |
a553a5a3 | 41 | #include "CommRead.h" |
ee0989f2 | 42 | #include "ConnectionDetail.h" |
0eb49b6d | 43 | #include "MemBuf.h" |
781ce8ff | 44 | #include "pconn.h" |
985c86bc | 45 | #include "SquidTime.h" |
b0469965 | 46 | #include "CommCalls.h" |
74257126 | 47 | #include "DescriptorSet.h" |
9b5c4a9a | 48 | #include "icmp/net_db.h" |
9837e5f0 | 49 | #include "ip/IpAddress.h" |
85944c1c | 50 | #include "ip/IpIntercept.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 { | |
9e008dda AJ |
64 | IOCB_NONE, |
65 | IOCB_READ, | |
66 | IOCB_WRITE | |
2b663917 | 67 | } iocb_type; |
68 | ||
82ec8dfc AR |
69 | static void commStopHalfClosedMonitor(int fd); |
70 | static IOCB commHalfClosedReader; | |
71 | ||
72 | ||
b0469965 | 73 | struct comm_io_callback_t { |
9e008dda AJ |
74 | iocb_type type; |
75 | int fd; | |
76 | AsyncCall::Pointer callback; | |
77 | char *buf; | |
78 | FREE *freefunc; | |
79 | int size; | |
80 | int offset; | |
81 | comm_err_t errcode; | |
82 | int xerrno; | |
83 | ||
84 | bool active() const { return callback != NULL; } | |
2b663917 | 85 | }; |
2b663917 | 86 | |
87 | struct _comm_fd { | |
9e008dda AJ |
88 | int fd; |
89 | comm_io_callback_t readcb; | |
90 | comm_io_callback_t writecb; | |
2b663917 | 91 | }; |
92 | typedef struct _comm_fd comm_fd_t; | |
93 | comm_fd_t *commfd_table; | |
94 | ||
b0469965 | 95 | // TODO: make this a comm_io_callback_t method? |
2b663917 | 96 | bool |
97 | commio_has_callback(int fd, iocb_type type, comm_io_callback_t *ccb) | |
98 | { | |
9e008dda AJ |
99 | assert(ccb->fd == fd); |
100 | assert(ccb->type == type); | |
101 | return ccb->active(); | |
2b663917 | 102 | } |
103 | ||
104 | /* | |
b0469965 | 105 | * Configure comm_io_callback_t for I/O |
2b663917 | 106 | * |
107 | * @param fd filedescriptor | |
108 | * @param ccb comm io callback | |
109 | * @param cb callback | |
110 | * @param cbdata callback data (must be cbdata'ed) | |
111 | * @param buf buffer, if applicable | |
112 | * @param freefunc freefunc, if applicable | |
113 | * @param size buffer size | |
114 | */ | |
b0469965 | 115 | static void |
116 | commio_set_callback(int fd, iocb_type type, comm_io_callback_t *ccb, | |
9e008dda | 117 | AsyncCall::Pointer &cb, char *buf, FREE *freefunc, int size) |
2b663917 | 118 | { |
9e008dda AJ |
119 | assert(!ccb->active()); |
120 | assert(ccb->type == type); | |
121 | assert(cb != NULL); | |
122 | ccb->fd = fd; | |
123 | ccb->callback = cb; | |
124 | ccb->buf = buf; | |
125 | ccb->freefunc = freefunc; | |
126 | ccb->size = size; | |
127 | ccb->offset = 0; | |
2b663917 | 128 | } |
129 | ||
130 | ||
b0469965 | 131 | // Schedule the callback call and clear the callback |
132 | static void | |
133 | commio_finish_callback(int fd, comm_io_callback_t *ccb, comm_err_t code, int xerrno) | |
2b663917 | 134 | { |
b0469965 | 135 | debugs(5, 3, "commio_finish_callback: called for FD " << fd << " (" << |
9e008dda AJ |
136 | code << ", " << xerrno << ")"); |
137 | assert(ccb->active()); | |
138 | assert(ccb->fd == fd); | |
139 | ccb->errcode = code; | |
140 | ccb->xerrno = xerrno; | |
141 | ||
142 | comm_io_callback_t cb = *ccb; | |
143 | ||
144 | /* We've got a copy; blow away the real one */ | |
145 | /* XXX duplicate code from commio_cancel_callback! */ | |
146 | ccb->xerrno = 0; | |
147 | ccb->callback = NULL; // cb has it | |
148 | ||
149 | /* free data */ | |
150 | if (cb.freefunc) { | |
151 | cb.freefunc(cb.buf); | |
152 | cb.buf = NULL; | |
153 | } | |
154 | ||
155 | if (cb.callback != NULL) { | |
b0469965 | 156 | typedef CommIoCbParams Params; |
157 | Params ¶ms = GetCommParams<Params>(cb.callback); | |
158 | params.fd = cb.fd; | |
159 | params.buf = cb.buf; | |
160 | params.size = cb.offset; | |
161 | params.flag = cb.errcode; | |
162 | params.xerrno = cb.xerrno; | |
163 | ScheduleCallHere(cb.callback); | |
9e008dda | 164 | } |
2b663917 | 165 | } |
166 | ||
167 | ||
168 | /* | |
169 | * Cancel the given callback | |
170 | * | |
171 | * Remember that the data is cbdataRef'ed. | |
172 | */ | |
b0469965 | 173 | // TODO: make this a comm_io_callback_t method |
174 | static void | |
2b663917 | 175 | commio_cancel_callback(int fd, comm_io_callback_t *ccb) |
176 | { | |
b0469965 | 177 | debugs(5, 3, "commio_cancel_callback: called for FD " << fd); |
9e008dda AJ |
178 | assert(ccb->fd == fd); |
179 | assert(ccb->active()); | |
2b663917 | 180 | |
9e008dda AJ |
181 | ccb->xerrno = 0; |
182 | ccb->callback = NULL; | |
2b663917 | 183 | } |
184 | ||
185 | /* | |
186 | * Call the given comm callback; assumes the callback is valid. | |
9e008dda | 187 | * |
2b663917 | 188 | * @param ccb io completion callback |
189 | */ | |
190 | void | |
191 | commio_call_callback(comm_io_callback_t *ccb) | |
192 | { | |
2b663917 | 193 | } |
194 | ||
2d8c0b1a | 195 | class ConnectStateData |
62e76326 | 196 | { |
2d8c0b1a | 197 | |
198 | public: | |
d2d59a68 | 199 | void *operator new (size_t); |
200 | void operator delete (void *); | |
2d8c0b1a | 201 | static void Connect (int fd, void *me); |
202 | void connect(); | |
203 | void callCallback(comm_err_t status, int xerrno); | |
204 | void defaults(); | |
cc192b50 | 205 | |
206 | // defaults given by client | |
f88211e8 | 207 | char *host; |
cc192b50 | 208 | u_short default_port; |
ad61a2b4 | 209 | IpAddress default_addr; |
cc192b50 | 210 | // NP: CANNOT store the default addr:port together as it gets set/reset differently. |
62e76326 | 211 | |
ad61a2b4 | 212 | IpAddress S; |
b0469965 | 213 | AsyncCall::Pointer callback; |
62e76326 | 214 | |
03a1ee42 | 215 | int fd; |
22c653cd | 216 | int tries; |
217 | int addrcount; | |
218 | int connstart; | |
d2d59a68 | 219 | |
220 | private: | |
0b77ecd8 | 221 | int commResetFD(); |
222 | int commRetryConnect(); | |
d2d59a68 | 223 | CBDATA_CLASS(ConnectStateData); |
2d8c0b1a | 224 | }; |
f88211e8 | 225 | |
090089c4 | 226 | /* STATIC */ |
62e76326 | 227 | |
74257126 AR |
228 | static DescriptorSet *TheHalfClosed = NULL; /// the set of half-closed FDs |
229 | static bool WillCheckHalfClosed = false; /// true if check is scheduled | |
230 | static EVH commHalfClosedCheck; | |
231 | static void commPlanHalfClosedCheck(); | |
232 | ||
cc192b50 | 233 | static comm_err_t commBind(int s, struct addrinfo &); |
f5b8bbc4 | 234 | static void commSetReuseAddr(int); |
235 | static void commSetNoLinger(int); | |
30a4f2a8 | 236 | #ifdef TCP_NODELAY |
f5b8bbc4 | 237 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 238 | #endif |
f5b8bbc4 | 239 | static void commSetTcpRcvbuf(int, int); |
f88211e8 | 240 | static PF commConnectFree; |
03a1ee42 | 241 | static PF commHandleWrite; |
edeb28fd | 242 | static IPH commConnectDnsHandle; |
723123a9 | 243 | |
3c1a197f | 244 | static PF comm_accept_try; |
c4b7a5a9 | 245 | |
62e76326 | 246 | class AcceptFD |
247 | { | |
248 | ||
249 | public: | |
b0469965 | 250 | AcceptFD(int aFd = -1): fd(aFd), theCallback(0), mayAcceptMore(false) {} |
62e76326 | 251 | |
b0469965 | 252 | void subscribe(AsyncCall::Pointer &call); |
253 | void acceptNext(); | |
254 | void notify(int newfd, comm_err_t, int xerrno, const ConnectionDetail &); | |
62e76326 | 255 | |
2d8c0b1a | 256 | int fd; |
545d554b | 257 | |
b0469965 | 258 | private: |
259 | bool acceptOne(); | |
62e76326 | 260 | |
b0469965 | 261 | AsyncCall::Pointer theCallback; |
262 | bool mayAcceptMore; | |
c4b7a5a9 | 263 | }; |
62e76326 | 264 | |
c4b7a5a9 | 265 | typedef enum { |
62e76326 | 266 | COMM_CB_READ = 1, |
2d8c0b1a | 267 | COMM_CB_DERIVED, |
c4b7a5a9 | 268 | } comm_callback_t; |
269 | ||
9e008dda | 270 | struct _fd_debug_t { |
43ae1d95 | 271 | char const *close_file; |
62e76326 | 272 | int close_line; |
c4b7a5a9 | 273 | }; |
62e76326 | 274 | |
c4b7a5a9 | 275 | typedef struct _fd_debug_t fd_debug_t; |
276 | ||
b001e822 | 277 | static MemAllocator *conn_close_pool = NULL; |
b0469965 | 278 | AcceptFD *fdc_table = NULL; // TODO: rename. And use Vector<>? |
c4b7a5a9 | 279 | fd_debug_t *fdd_table = NULL; |
62e76326 | 280 | |
b0469965 | 281 | static bool |
282 | isOpen(const int fd) | |
b300c36d | 283 | { |
9e008dda | 284 | return fd_table[fd].flags.open != 0; |
b300c36d | 285 | } |
286 | ||
e1a88700 | 287 | /** |
c4b7a5a9 | 288 | * Attempt a read |
289 | * | |
290 | * If the read attempt succeeds or fails, call the callback. | |
291 | * Else, wait for another IO notification. | |
292 | */ | |
2d8c0b1a | 293 | void |
2b663917 | 294 | commHandleRead(int fd, void *data) |
2d8c0b1a | 295 | { |
2b663917 | 296 | comm_io_callback_t *ccb = (comm_io_callback_t *) data; |
9e008dda | 297 | |
2b663917 | 298 | assert(data == COMMIO_FD_READCB(fd)); |
299 | assert(commio_has_callback(fd, IOCB_READ, ccb)); | |
62e76326 | 300 | /* Attempt a read */ |
301 | statCounter.syscalls.sock.reads++; | |
302 | errno = 0; | |
2d8c0b1a | 303 | int retval; |
2b663917 | 304 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 305 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 306 | |
307 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 308 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
9e008dda AJ |
309 | ccb->offset = 0; |
310 | commio_finish_callback(fd, ccb, COMM_ERROR, errno); | |
62e76326 | 311 | return; |
312 | }; | |
313 | ||
314 | /* See if we read anything */ | |
315 | /* Note - read 0 == socket EOF, which is a valid read */ | |
316 | if (retval >= 0) { | |
317 | fd_bytes(fd, retval, FD_READ); | |
9e008dda AJ |
318 | ccb->offset = retval; |
319 | commio_finish_callback(fd, ccb, COMM_OK, errno); | |
62e76326 | 320 | return; |
321 | } | |
c4b7a5a9 | 322 | |
62e76326 | 323 | /* Nope, register for some more IO */ |
2b663917 | 324 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 325 | } |
326 | ||
e1a88700 | 327 | /** |
c4b7a5a9 | 328 | * Queue a read. handler/handler_data are called when the read |
329 | * completes, on error, or on file descriptor close. | |
330 | */ | |
331 | void | |
332 | comm_read(int fd, char *buf, int size, IOCB *handler, void *handler_data) | |
b0469965 | 333 | { |
334 | AsyncCall::Pointer call = commCbCall(5,4, "SomeCommReadHandler", | |
9e008dda | 335 | CommIoCbPtrFun(handler, handler_data)); |
b0469965 | 336 | comm_read(fd, buf, size, call); |
337 | } | |
338 | ||
339 | void | |
340 | comm_read(int fd, char *buf, int size, AsyncCall::Pointer &callback) | |
c4b7a5a9 | 341 | { |
82ec8dfc | 342 | debugs(5, 5, "comm_read, queueing read for FD " << fd << "; asynCall " << callback); |
c4b7a5a9 | 343 | |
82ec8dfc AR |
344 | /* Make sure we are open and not closing */ |
345 | assert(isOpen(fd)); | |
346 | assert(!fd_table[fd].closing()); | |
347 | comm_io_callback_t *ccb = COMMIO_FD_READCB(fd); | |
348 | ||
349 | // Make sure we are either not reading or just passively monitoring. | |
350 | // Active/passive conflicts are OK and simply cancel passive monitoring. | |
351 | if (ccb->active()) { | |
352 | // if the assertion below fails, we have an active comm_read conflict | |
74257126 | 353 | assert(fd_table[fd].halfClosedReader != NULL); |
82ec8dfc AR |
354 | commStopHalfClosedMonitor(fd); |
355 | assert(!ccb->active()); | |
356 | } | |
528b2c61 | 357 | |
2b663917 | 358 | /* Queue the read */ |
82ec8dfc AR |
359 | commio_set_callback(fd, IOCB_READ, ccb, callback, (char *)buf, NULL, size); |
360 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, ccb, 0); | |
c4b7a5a9 | 361 | } |
362 | ||
e1a88700 | 363 | /** |
c4b7a5a9 | 364 | * Empty the read buffers |
365 | * | |
366 | * This is a magical routine that empties the read buffers. | |
367 | * Under some platforms (Linux) if a buffer has data in it before | |
368 | * you call close(), the socket will hang and take quite a while | |
369 | * to timeout. | |
370 | */ | |
371 | static void | |
372 | comm_empty_os_read_buffers(int fd) | |
373 | { | |
a42d5c25 | 374 | #ifdef _SQUID_LINUX_ |
c4b7a5a9 | 375 | /* prevent those nasty RST packets */ |
376 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 377 | |
cc192b50 | 378 | if (fd_table[fd].flags.nonblocking == 1) { |
379 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) {}; | |
380 | } | |
c4b7a5a9 | 381 | #endif |
382 | } | |
383 | ||
384 | ||
e1a88700 | 385 | /** |
2b663917 | 386 | * Return whether the FD has a pending completed callback. |
c4b7a5a9 | 387 | */ |
388 | int | |
389 | comm_has_pending_read_callback(int fd) | |
390 | { | |
b0469965 | 391 | assert(isOpen(fd)); |
392 | // XXX: We do not know whether there is a read callback scheduled. | |
393 | // This is used for pconn management that should probably be more | |
394 | // tightly integrated into comm to minimize the chance that a | |
395 | // closing pconn socket will be used for a new transaction. | |
545d554b | 396 | return false; |
c4b7a5a9 | 397 | } |
398 | ||
b0469965 | 399 | // Does comm check this fd for read readiness? |
400 | // Note that when comm is not monitoring, there can be a pending callback | |
401 | // call, which may resume comm monitoring once fired. | |
528b2c61 | 402 | bool |
b0469965 | 403 | comm_monitors_read(int fd) |
c4b7a5a9 | 404 | { |
b0469965 | 405 | assert(isOpen(fd)); |
406 | // Being active is usually the same as monitoring because we always | |
407 | // start monitoring the FD when we configure comm_io_callback_t for I/O | |
408 | // and we usually configure comm_io_callback_t for I/O when we starting | |
409 | // monitoring a FD for reading. TODO: replace with commio_has_callback | |
410 | return COMMIO_FD_READCB(fd)->active(); | |
c4b7a5a9 | 411 | } |
412 | ||
e1a88700 | 413 | /** |
c4b7a5a9 | 414 | * Cancel a pending read. Assert that we have the right parameters, |
415 | * and that there are no pending read events! | |
2b663917 | 416 | * |
b0469965 | 417 | * XXX: We do not assert that there are no pending read events and |
418 | * with async calls it becomes even more difficult. | |
419 | * The whole interface should be reworked to do callback->cancel() | |
420 | * instead of searching for places where the callback may be stored and | |
421 | * updating the state of those places. | |
422 | * | |
2b663917 | 423 | * AHC Don't call the comm handlers? |
c4b7a5a9 | 424 | */ |
425 | void | |
426 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
427 | { | |
b0469965 | 428 | if (!isOpen(fd)) { |
429 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
430 | return; | |
9e008dda | 431 | } |
b0469965 | 432 | |
433 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
434 | // TODO: is "active" == "monitors FD"? | |
435 | if (!cb->active()) { | |
436 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
437 | return; | |
9e008dda | 438 | } |
b0469965 | 439 | |
440 | typedef CommCbFunPtrCallT<CommIoCbPtrFun> Call; | |
441 | Call *call = dynamic_cast<Call*>(cb->callback.getRaw()); | |
442 | if (!call) { | |
443 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " lacks callback"); | |
444 | return; | |
9e008dda | 445 | } |
b0469965 | 446 | |
82ec8dfc AR |
447 | call->cancel("old comm_read_cancel"); |
448 | ||
b0469965 | 449 | typedef CommIoCbParams Params; |
450 | const Params ¶ms = GetCommParams<Params>(cb->callback); | |
c4b7a5a9 | 451 | |
c4b7a5a9 | 452 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
b0469965 | 453 | assert(call->dialer.handler == callback); |
454 | assert(params.data == data); | |
c4b7a5a9 | 455 | |
456 | /* Delete the callback */ | |
b0469965 | 457 | commio_cancel_callback(fd, cb); |
420f2ac8 | 458 | |
459 | /* And the IO event */ | |
62e76326 | 460 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 461 | } |
462 | ||
c4b7a5a9 | 463 | void |
b0469965 | 464 | comm_read_cancel(int fd, AsyncCall::Pointer &callback) |
c4b7a5a9 | 465 | { |
b0469965 | 466 | callback->cancel("comm_read_cancel"); |
9e008dda | 467 | |
b0469965 | 468 | if (!isOpen(fd)) { |
469 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
470 | return; | |
471 | } | |
472 | ||
473 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
474 | ||
475 | if (!cb->active()) { | |
476 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
477 | return; | |
478 | } | |
479 | ||
480 | AsyncCall::Pointer call = cb->callback; | |
82ec8dfc | 481 | assert(call != NULL); // XXX: should never fail (active() checks for callback==NULL) |
9e008dda | 482 | |
b0469965 | 483 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
484 | assert(call == callback); | |
c4b7a5a9 | 485 | |
b0469965 | 486 | /* Delete the callback */ |
487 | commio_cancel_callback(fd, cb); | |
488 | ||
489 | /* And the IO event */ | |
490 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); | |
c4b7a5a9 | 491 | } |
492 | ||
493 | ||
e1a88700 | 494 | /** |
ce767c23 | 495 | * synchronous wrapper around udp socket functions |
496 | */ | |
ce767c23 | 497 | int |
ad61a2b4 | 498 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, IpAddress &from) |
ce767c23 | 499 | { |
62e76326 | 500 | statCounter.syscalls.sock.recvfroms++; |
cc192b50 | 501 | int x = 0; |
502 | struct addrinfo *AI = NULL; | |
503 | ||
504 | debugs(5,8, "comm_udp_recvfrom: FD " << fd << " from " << from); | |
505 | ||
506 | assert( NULL == AI ); | |
507 | ||
508 | from.InitAddrInfo(AI); | |
509 | ||
510 | x = recvfrom(fd, buf, len, flags, AI->ai_addr, &AI->ai_addrlen); | |
511 | ||
512 | from = *AI; | |
513 | ||
514 | from.FreeAddrInfo(AI); | |
515 | ||
516 | return x; | |
ce767c23 | 517 | } |
518 | ||
365f12a9 | 519 | int |
7d21986b | 520 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 521 | { |
ad61a2b4 | 522 | IpAddress nul; |
cc192b50 | 523 | return comm_udp_recvfrom(fd, buf, len, flags, nul); |
365f12a9 | 524 | } |
525 | ||
f71da12c | 526 | ssize_t |
7d21986b | 527 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 528 | { |
62e76326 | 529 | return send(s, buf, len, flags); |
f71da12c | 530 | } |
ce767c23 | 531 | |
532 | ||
545d554b | 533 | bool |
534 | comm_has_incomplete_write(int fd) | |
535 | { | |
b0469965 | 536 | assert(isOpen(fd)); |
537 | return COMMIO_FD_WRITECB(fd)->active(); | |
d4cb310b | 538 | } |
539 | ||
e1a88700 | 540 | /** |
cf3c0ee3 | 541 | * Queue a write. handler/handler_data are called when the write fully |
542 | * completes, on error, or on file descriptor close. | |
543 | */ | |
9864ee44 | 544 | |
090089c4 | 545 | /* Return the local port associated with fd. */ |
b8d8561b | 546 | u_short |
547 | comm_local_port(int fd) | |
090089c4 | 548 | { |
ad61a2b4 | 549 | IpAddress temp; |
cc192b50 | 550 | struct addrinfo *addr = NULL; |
76f87348 | 551 | fde *F = &fd_table[fd]; |
090089c4 | 552 | |
090089c4 | 553 | /* If the fd is closed already, just return */ |
62e76326 | 554 | |
60c0b5a2 | 555 | if (!F->flags.open) { |
bf8fe701 | 556 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 557 | return 0; |
090089c4 | 558 | } |
62e76326 | 559 | |
cc192b50 | 560 | if (F->local_addr.GetPort()) |
561 | return F->local_addr.GetPort(); | |
62e76326 | 562 | |
cc192b50 | 563 | temp.InitAddrInfo(addr); |
62e76326 | 564 | |
cc192b50 | 565 | if (getsockname(fd, addr->ai_addr, &(addr->ai_addrlen)) ) { |
bf8fe701 | 566 | debugs(50, 1, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
cc192b50 | 567 | temp.FreeAddrInfo(addr); |
62e76326 | 568 | return 0; |
090089c4 | 569 | } |
cc192b50 | 570 | temp = *addr; |
571 | ||
572 | temp.FreeAddrInfo(addr); | |
573 | ||
574 | F->local_addr.SetPort(temp.GetPort()); | |
575 | ||
576 | // grab default socket information for this address | |
577 | temp.GetAddrInfo(addr); | |
578 | ||
579 | F->sock_family = addr->ai_family; | |
580 | ||
581 | temp.FreeAddrInfo(addr); | |
62e76326 | 582 | |
cc192b50 | 583 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_addr.GetPort()); |
584 | return F->local_addr.GetPort(); | |
090089c4 | 585 | } |
586 | ||
3d7e9d7c | 587 | static comm_err_t |
cc192b50 | 588 | commBind(int s, struct addrinfo &inaddr) |
090089c4 | 589 | { |
83704487 | 590 | statCounter.syscalls.sock.binds++; |
62e76326 | 591 | |
cc192b50 | 592 | if (bind(s, inaddr.ai_addr, inaddr.ai_addrlen) == 0) |
62e76326 | 593 | return COMM_OK; |
594 | ||
cc192b50 | 595 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << fd_table[s].local_addr << ": " << xstrerror()); |
62e76326 | 596 | |
090089c4 | 597 | return COMM_ERROR; |
598 | } | |
599 | ||
e1a88700 | 600 | /** |
601 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
602 | * is OR of flags specified in comm.h. Defaults TOS | |
603 | */ | |
b8d8561b | 604 | int |
16b204c4 | 605 | comm_open(int sock_type, |
62e76326 | 606 | int proto, |
ad61a2b4 | 607 | IpAddress &addr, |
62e76326 | 608 | int flags, |
609 | const char *note) | |
d6827718 | 610 | { |
cc192b50 | 611 | return comm_openex(sock_type, proto, addr, flags, 0, note); |
d6827718 | 612 | } |
613 | ||
2d8c0b1a | 614 | static bool |
615 | limitError(int const anErrno) | |
616 | { | |
617 | return anErrno == ENFILE || anErrno == EMFILE; | |
618 | } | |
d6827718 | 619 | |
057f5854 | 620 | int |
621 | comm_set_tos(int fd, int tos) | |
622 | { | |
623 | #ifdef IP_TOS | |
9e008dda AJ |
624 | int x = setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)); |
625 | if (x < 0) | |
626 | debugs(50, 1, "comm_set_tos: setsockopt(IP_TOS) on FD " << fd << ": " << xstrerror()); | |
627 | return x; | |
057f5854 | 628 | #else |
9e008dda AJ |
629 | debugs(50, 0, "WARNING: setsockopt(IP_TOS) not supported on this platform"); |
630 | return -1; | |
057f5854 | 631 | #endif |
632 | } | |
633 | ||
cc192b50 | 634 | void |
635 | comm_set_v6only(int fd, int tos) | |
636 | { | |
637 | #ifdef IPV6_V6ONLY | |
638 | if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) < 0) { | |
639 | debugs(50, 1, "comm_open: setsockopt(IPV6_V6ONLY) on FD " << fd << ": " << xstrerror()); | |
640 | } | |
641 | #else | |
642 | debugs(50, 0, "WARNING: comm_open: setsockopt(IPV6_V6ONLY) not supported on this platform"); | |
643 | #endif /* sockopt */ | |
644 | } | |
057f5854 | 645 | |
40d6264d AJ |
646 | /** |
647 | * Set the socket IP_TRANSPARENT option for Linux TPROXY v4 support. | |
648 | */ | |
f1e0717c | 649 | void |
e950e673 | 650 | comm_set_transparent(int fd) |
f1e0717c | 651 | { |
2ad20b4f | 652 | #if defined(IP_TRANSPARENT) |
e950e673 | 653 | int tos = 1; |
ef88b51d AJ |
654 | if (setsockopt(fd, SOL_IP, IP_TRANSPARENT, (char *) &tos, sizeof(int)) < 0) { |
655 | debugs(50, DBG_IMPORTANT, "comm_open: setsockopt(IP_TRANSPARENT) on FD " << fd << ": " << xstrerror()); | |
9e008dda | 656 | } else { |
3949d8b7 AJ |
657 | /* mark the socket as having transparent options */ |
658 | fd_table[fd].flags.transparent = 1; | |
659 | } | |
f1e0717c | 660 | #else |
ef88b51d | 661 | debugs(50, DBG_CRITICAL, "WARNING: comm_open: setsockopt(IP_TRANSPARENT) not supported on this platform"); |
f1e0717c AJ |
662 | #endif /* sockopt */ |
663 | } | |
664 | ||
e1a88700 | 665 | /** |
666 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
667 | * is OR of flags specified in defines.h:COMM_* | |
668 | */ | |
d6827718 | 669 | int |
670 | comm_openex(int sock_type, | |
62e76326 | 671 | int proto, |
ad61a2b4 | 672 | IpAddress &addr, |
62e76326 | 673 | int flags, |
674 | unsigned char TOS, | |
675 | const char *note) | |
090089c4 | 676 | { |
677 | int new_socket; | |
76f87348 | 678 | fde *F = NULL; |
cc192b50 | 679 | int tos = 0; |
680 | struct addrinfo *AI = NULL; | |
090089c4 | 681 | |
88bfe092 | 682 | PROF_start(comm_open); |
090089c4 | 683 | /* Create socket for accepting new connections. */ |
83704487 | 684 | statCounter.syscalls.sock.sockets++; |
62e76326 | 685 | |
cc192b50 | 686 | /* Setup the socket addrinfo details for use */ |
687 | addr.GetAddrInfo(AI); | |
688 | AI->ai_socktype = sock_type; | |
689 | AI->ai_protocol = proto; | |
cc192b50 | 690 | |
691 | debugs(50, 3, "comm_openex: Attempt open socket for: " << addr ); | |
692 | ||
9e008dda | 693 | if ((new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol)) < 0) { |
62e76326 | 694 | /* Increase the number of reserved fd's if calls to socket() |
695 | * are failing because the open file table is full. This | |
696 | * limits the number of simultaneous clients */ | |
697 | ||
2d8c0b1a | 698 | if (limitError(errno)) { |
dd4e714f | 699 | debugs(50, DBG_IMPORTANT, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 700 | fdAdjustReserved(); |
2d8c0b1a | 701 | } else { |
8ca8bd92 | 702 | debugs(50, DBG_CRITICAL, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 703 | } |
704 | ||
cc192b50 | 705 | addr.FreeAddrInfo(AI); |
706 | ||
62e76326 | 707 | PROF_stop(comm_open); |
708 | return -1; | |
090089c4 | 709 | } |
62e76326 | 710 | |
cc192b50 | 711 | debugs(50, 3, "comm_openex: Opened socket FD " << new_socket << " : family=" << AI->ai_family << ", type=" << AI->ai_socktype << ", protocol=" << AI->ai_protocol ); |
712 | ||
d6827718 | 713 | /* set TOS if needed */ |
cc192b50 | 714 | if (TOS && comm_set_tos(new_socket, TOS) ) { |
62e76326 | 715 | tos = TOS; |
cc192b50 | 716 | } |
62e76326 | 717 | |
cc192b50 | 718 | #if IPV6_SPECIAL_SPLITSTACK |
62e76326 | 719 | |
9e008dda | 720 | if ( addr.IsIPv6() ) |
cc192b50 | 721 | comm_set_v6only(new_socket, tos); |
62e76326 | 722 | |
d6827718 | 723 | #endif |
62e76326 | 724 | |
9b1f7ee8 | 725 | #if IPV6_SPECIAL_V4MAPPED |
cc192b50 | 726 | |
727 | /* Windows Vista supports Dual-Sockets. BUT defaults them to V6ONLY. Turn it OFF. */ | |
9b1f7ee8 | 728 | /* Other OS may have this administratively disabled for general use. Same deal. */ |
9e008dda | 729 | if ( addr.IsIPv6() ) |
cc192b50 | 730 | comm_set_v6only(new_socket, 0); |
731 | ||
732 | #endif | |
62e76326 | 733 | |
090089c4 | 734 | /* update fdstat */ |
bf8fe701 | 735 | debugs(5, 5, "comm_open: FD " << new_socket << " is a new socket"); |
62e76326 | 736 | |
b0469965 | 737 | assert(!isOpen(new_socket)); |
5c5783a2 | 738 | fd_open(new_socket, FD_SOCKET, note); |
62e76326 | 739 | |
c4b7a5a9 | 740 | fdd_table[new_socket].close_file = NULL; |
62e76326 | 741 | |
c4b7a5a9 | 742 | fdd_table[new_socket].close_line = 0; |
62e76326 | 743 | |
76f87348 | 744 | F = &fd_table[new_socket]; |
62e76326 | 745 | |
d6827718 | 746 | F->local_addr = addr; |
62e76326 | 747 | |
cc192b50 | 748 | F->tos = TOS; |
749 | ||
750 | F->sock_family = AI->ai_family; | |
62e76326 | 751 | |
79a15e0a | 752 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 753 | commSetCloseOnExec(new_socket); |
754 | ||
cdc33f35 | 755 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 756 | commSetReuseAddr(new_socket); |
757 | ||
9e008dda | 758 | if (addr.GetPort() > (u_short) 0) { |
a50bfe93 | 759 | #ifdef _SQUID_MSWIN_ |
760 | ||
761 | if (sock_type != SOCK_DGRAM) | |
762 | #endif | |
763 | ||
764 | commSetNoLinger(new_socket); | |
62e76326 | 765 | |
766 | if (opt_reuseaddr) | |
767 | commSetReuseAddr(new_socket); | |
090089c4 | 768 | } |
62e76326 | 769 | |
a35595cd | 770 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
9e008dda | 771 | if ((flags & COMM_TRANSPARENT)) { |
a35595cd AJ |
772 | comm_set_transparent(new_socket); |
773 | } | |
a35595cd | 774 | |
9e008dda | 775 | if (!addr.IsNoAddr()) { |
cc192b50 | 776 | if (commBind(new_socket, *AI) != COMM_OK) { |
62e76326 | 777 | comm_close(new_socket); |
cc192b50 | 778 | addr.FreeAddrInfo(AI); |
62e76326 | 779 | return -1; |
780 | PROF_stop(comm_open); | |
781 | } | |
23ff6968 | 782 | } |
62e76326 | 783 | |
cc192b50 | 784 | addr.FreeAddrInfo(AI); |
090089c4 | 785 | |
79a15e0a | 786 | if (flags & COMM_NONBLOCKING) |
9e008dda | 787 | if (commSetNonBlocking(new_socket) == COMM_ERROR) { |
62e76326 | 788 | return -1; |
789 | PROF_stop(comm_open); | |
790 | } | |
791 | ||
30a4f2a8 | 792 | #ifdef TCP_NODELAY |
793 | if (sock_type == SOCK_STREAM) | |
62e76326 | 794 | commSetTcpNoDelay(new_socket); |
795 | ||
30a4f2a8 | 796 | #endif |
62e76326 | 797 | |
1241e63e | 798 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 799 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
800 | ||
88bfe092 | 801 | PROF_stop(comm_open); |
62e76326 | 802 | |
090089c4 | 803 | return new_socket; |
804 | } | |
805 | ||
d2d59a68 | 806 | CBDATA_CLASS_INIT(ConnectStateData); |
807 | ||
808 | void * | |
809 | ConnectStateData::operator new (size_t size) | |
810 | { | |
811 | CBDATA_INIT_TYPE(ConnectStateData); | |
812 | return cbdataAlloc(ConnectStateData); | |
813 | } | |
814 | ||
815 | void | |
816 | ConnectStateData::operator delete (void *address) | |
817 | { | |
818 | cbdataFree(address); | |
819 | } | |
820 | ||
b0469965 | 821 | |
822 | ||
e5f6c5c2 | 823 | void |
b0469965 | 824 | commConnectStart(int fd, const char *host, u_short port, AsyncCall::Pointer &cb) |
e924600d | 825 | { |
b0469965 | 826 | debugs(cb->debugSection, cb->debugLevel, "commConnectStart: FD " << fd << |
9e008dda | 827 | ", cb " << cb << ", " << host << ":" << port); // TODO: just print *cb |
b0469965 | 828 | |
28c60158 | 829 | ConnectStateData *cs; |
d2d59a68 | 830 | cs = new ConnectStateData; |
03a1ee42 | 831 | cs->fd = fd; |
e924600d | 832 | cs->host = xstrdup(host); |
cc192b50 | 833 | cs->default_port = port; |
b0469965 | 834 | cs->callback = cb; |
835 | ||
e924600d | 836 | comm_add_close_handler(fd, commConnectFree, cs); |
8407afee | 837 | ipcache_nbgethostbyname(host, commConnectDnsHandle, cs); |
edeb28fd | 838 | } |
839 | ||
b0469965 | 840 | // TODO: Remove this and similar callback registration functions by replacing |
841 | // (callback,data) parameters with an AsyncCall so that we do not have to use | |
842 | // a generic call name and debug level when creating an AsyncCall. This will | |
843 | // also cut the number of callback registration routines in half. | |
844 | void | |
845 | commConnectStart(int fd, const char *host, u_short port, CNCB * callback, void *data) | |
846 | { | |
847 | debugs(5, 5, "commConnectStart: FD " << fd << ", data " << data << ", " << host << ":" << port); | |
848 | AsyncCall::Pointer call = commCbCall(5,3, | |
9e008dda | 849 | "SomeCommConnectHandler", CommConnectCbPtrFun(callback, data)); |
b0469965 | 850 | commConnectStart(fd, host, port, call); |
851 | } | |
852 | ||
edeb28fd | 853 | static void |
03a1ee42 | 854 | commConnectDnsHandle(const ipcache_addrs * ia, void *data) |
edeb28fd | 855 | { |
e6ccf245 | 856 | ConnectStateData *cs = (ConnectStateData *)data; |
62e76326 | 857 | |
edeb28fd | 858 | if (ia == NULL) { |
bf8fe701 | 859 | debugs(5, 3, "commConnectDnsHandle: Unknown host: " << cs->host); |
62e76326 | 860 | |
861 | if (!dns_error_message) { | |
862 | dns_error_message = "Unknown DNS error"; | |
bf8fe701 | 863 | debugs(5, 1, "commConnectDnsHandle: Bad dns_error_message"); |
62e76326 | 864 | } |
865 | ||
866 | assert(dns_error_message != NULL); | |
2d8c0b1a | 867 | cs->callCallback(COMM_ERR_DNS, 0); |
62e76326 | 868 | return; |
edeb28fd | 869 | } |
62e76326 | 870 | |
f076b37b | 871 | assert(ia->cur < ia->count); |
cc192b50 | 872 | |
873 | cs->default_addr = ia->in_addrs[ia->cur]; | |
a12a049a | 874 | |
875 | if (Config.onoff.balance_on_multiple_ip) | |
876 | ipcacheCycleAddr(cs->host, NULL); | |
877 | ||
22c653cd | 878 | cs->addrcount = ia->count; |
a12a049a | 879 | |
22c653cd | 880 | cs->connstart = squid_curtime; |
a12a049a | 881 | |
2d8c0b1a | 882 | cs->connect(); |
e924600d | 883 | } |
884 | ||
2d8c0b1a | 885 | void |
886 | ConnectStateData::callCallback(comm_err_t status, int xerrno) | |
887 | { | |
b0469965 | 888 | debugs(5, 3, "commConnectCallback: FD " << fd); |
bf8fe701 | 889 | |
2d8c0b1a | 890 | comm_remove_close_handler(fd, commConnectFree, this); |
e1b16349 | 891 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 892 | |
b0469965 | 893 | typedef CommConnectCbParams Params; |
894 | Params ¶ms = GetCommParams<Params>(callback); | |
895 | params.fd = fd; | |
896 | params.flag = status; | |
897 | params.xerrno = xerrno; | |
898 | ScheduleCallHere(callback); | |
899 | callback = NULL; | |
62e76326 | 900 | |
744c68f5 | 901 | commConnectFree(fd, this); |
f88211e8 | 902 | } |
903 | ||
e924600d | 904 | static void |
9daca08e | 905 | commConnectFree(int fd, void *data) |
e924600d | 906 | { |
e6ccf245 | 907 | ConnectStateData *cs = (ConnectStateData *)data; |
bf8fe701 | 908 | debugs(5, 3, "commConnectFree: FD " << fd); |
b0469965 | 909 | // delete cs->callback; |
910 | cs->callback = NULL; | |
8407afee | 911 | safe_free(cs->host); |
00d77d6b | 912 | delete cs; |
e924600d | 913 | } |
914 | ||
2d8c0b1a | 915 | static void |
916 | copyFDFlags(int to, fde *F) | |
917 | { | |
918 | if (F->flags.close_on_exec) | |
919 | commSetCloseOnExec(to); | |
920 | ||
921 | if (F->flags.nonblocking) | |
922 | commSetNonBlocking(to); | |
923 | ||
924 | #ifdef TCP_NODELAY | |
925 | ||
926 | if (F->flags.nodelay) | |
927 | commSetTcpNoDelay(to); | |
928 | ||
929 | #endif | |
930 | ||
931 | if (Config.tcpRcvBufsz > 0) | |
932 | commSetTcpRcvbuf(to, Config.tcpRcvBufsz); | |
933 | } | |
934 | ||
22c653cd | 935 | /* Reset FD so that we can connect() again */ |
0b77ecd8 | 936 | int |
937 | ConnectStateData::commResetFD() | |
edeb28fd | 938 | { |
cc192b50 | 939 | struct addrinfo *AI = NULL; |
ad61a2b4 | 940 | IpAddress nul; |
9d92af86 | 941 | int new_family = AF_UNSPEC; |
cc192b50 | 942 | |
b0469965 | 943 | // XXX: do we have to check this? |
944 | // | |
945 | // if (!cbdataReferenceValid(callback.data)) | |
946 | // return 0; | |
62e76326 | 947 | |
83704487 | 948 | statCounter.syscalls.sock.sockets++; |
62e76326 | 949 | |
cc192b50 | 950 | /* setup a bare-bones addrinfo */ |
9d92af86 | 951 | /* TODO INET6: for WinXP we may need to check the local_addr type and setup the family properly. */ |
cc192b50 | 952 | nul.GetAddrInfo(AI); |
9d92af86 | 953 | new_family = AI->ai_family; |
cc192b50 | 954 | |
955 | int fd2 = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); | |
956 | ||
957 | nul.FreeAddrInfo(AI); | |
62e76326 | 958 | |
edeb28fd | 959 | if (fd2 < 0) { |
8ca8bd92 | 960 | debugs(5, DBG_CRITICAL, HERE << "WARNING: FD " << fd2 << " socket failed to allocate: " << xstrerror()); |
62e76326 | 961 | |
962 | if (ENFILE == errno || EMFILE == errno) | |
963 | fdAdjustReserved(); | |
964 | ||
965 | return 0; | |
edeb28fd | 966 | } |
62e76326 | 967 | |
68aa4272 | 968 | #ifdef _SQUID_MSWIN_ |
969 | ||
970 | /* On Windows dup2() can't work correctly on Sockets, the */ | |
971 | /* workaround is to close the destination Socket before call them. */ | |
0b77ecd8 | 972 | close(fd); |
68aa4272 | 973 | |
974 | #endif | |
975 | ||
0b77ecd8 | 976 | if (dup2(fd2, fd) < 0) { |
8ca8bd92 | 977 | debugs(5, DBG_CRITICAL, HERE << "WARNING: dup2(FD " << fd2 << ", FD " << fd << ") failed: " << xstrerror()); |
62e76326 | 978 | |
979 | if (ENFILE == errno || EMFILE == errno) | |
980 | fdAdjustReserved(); | |
981 | ||
982 | close(fd2); | |
983 | ||
984 | return 0; | |
edeb28fd | 985 | } |
3a5a4930 | 986 | commResetSelect(fd); |
62e76326 | 987 | |
edeb28fd | 988 | close(fd2); |
0b77ecd8 | 989 | fde *F = &fd_table[fd]; |
9d92af86 AJ |
990 | |
991 | /* INET6: copy the new sockets family type to the FDE table */ | |
992 | fd_table[fd].sock_family = new_family; | |
993 | ||
0b77ecd8 | 994 | fd_table[fd].flags.called_connect = 0; |
09544acc | 995 | /* |
996 | * yuck, this has assumptions about comm_open() arguments for | |
997 | * the original socket | |
998 | */ | |
62e76326 | 999 | |
e17b4929 | 1000 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
9e008dda | 1001 | if ( F->flags.transparent ) { |
e17b4929 AJ |
1002 | comm_set_transparent(fd); |
1003 | } | |
1004 | ||
cc192b50 | 1005 | AI = NULL; |
1006 | F->local_addr.GetAddrInfo(AI); | |
1007 | ||
1008 | if (commBind(fd, *AI) != COMM_OK) { | |
68d57d84 | 1009 | debugs(5, DBG_CRITICAL, "WARNING: Reset of FD " << fd << " for " << F->local_addr << " failed to bind: " << xstrerror()); |
cc192b50 | 1010 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 1011 | return 0; |
09544acc | 1012 | } |
cc192b50 | 1013 | F->local_addr.FreeAddrInfo(AI); |
62e76326 | 1014 | |
cc192b50 | 1015 | if (F->tos) |
1016 | comm_set_tos(fd, F->tos); | |
1017 | ||
1018 | #if IPV6_SPECIAL_SPLITSTACK | |
1019 | ||
9e008dda | 1020 | if ( F->local_addr.IsIPv6() ) |
cc192b50 | 1021 | comm_set_v6only(fd, F->tos); |
62e76326 | 1022 | |
d6827718 | 1023 | #endif |
cc192b50 | 1024 | |
f3767a6a | 1025 | copyFDFlags(fd, F); |
62e76326 | 1026 | |
edeb28fd | 1027 | return 1; |
1028 | } | |
1029 | ||
0b77ecd8 | 1030 | int |
1031 | ConnectStateData::commRetryConnect() | |
22c653cd | 1032 | { |
0b77ecd8 | 1033 | assert(addrcount > 0); |
62e76326 | 1034 | |
0b77ecd8 | 1035 | if (addrcount == 1) { |
1036 | if (tries >= Config.retry.maxtries) | |
62e76326 | 1037 | return 0; |
1038 | ||
0b77ecd8 | 1039 | if (squid_curtime - connstart > Config.Timeout.connect) |
62e76326 | 1040 | return 0; |
22c653cd | 1041 | } else { |
0b77ecd8 | 1042 | if (tries > addrcount) |
62e76326 | 1043 | return 0; |
22c653cd | 1044 | } |
62e76326 | 1045 | |
0b77ecd8 | 1046 | return commResetFD(); |
22c653cd | 1047 | } |
1048 | ||
4ed0e075 | 1049 | static void |
1050 | commReconnect(void *data) | |
1051 | { | |
1052 | ConnectStateData *cs = (ConnectStateData *)data; | |
1053 | ipcache_nbgethostbyname(cs->host, commConnectDnsHandle, cs); | |
1054 | } | |
1055 | ||
f3767a6a | 1056 | /** Connect SOCK to specified DEST_PORT at DEST_HOST. */ |
2d8c0b1a | 1057 | void |
f3767a6a | 1058 | ConnectStateData::Connect(int fd, void *me) |
090089c4 | 1059 | { |
2d8c0b1a | 1060 | ConnectStateData *cs = (ConnectStateData *)me; |
1061 | assert (cs->fd == fd); | |
1062 | cs->connect(); | |
1063 | } | |
1064 | ||
1065 | void | |
1066 | ConnectStateData::defaults() | |
1067 | { | |
cc192b50 | 1068 | S = default_addr; |
1069 | S.SetPort(default_port); | |
2d8c0b1a | 1070 | } |
62e76326 | 1071 | |
2d8c0b1a | 1072 | void |
1073 | ConnectStateData::connect() | |
1074 | { | |
cc192b50 | 1075 | if (S.IsAnyAddr()) |
2d8c0b1a | 1076 | defaults(); |
62e76326 | 1077 | |
f3767a6a | 1078 | debugs(5,5, HERE << "to " << S); |
cc192b50 | 1079 | |
1080 | switch (comm_connect_addr(fd, S) ) { | |
62e76326 | 1081 | |
e5f6c5c2 | 1082 | case COMM_INPROGRESS: |
f3767a6a | 1083 | debugs(5, 5, HERE << "FD " << fd << ": COMM_INPROGRESS"); |
2d8c0b1a | 1084 | commSetSelect(fd, COMM_SELECT_WRITE, ConnectStateData::Connect, this, 0); |
62e76326 | 1085 | break; |
1086 | ||
e5f6c5c2 | 1087 | case COMM_OK: |
f3767a6a | 1088 | debugs(5, 5, HERE << "FD " << fd << ": COMM_OK - connected"); |
cc192b50 | 1089 | ipcacheMarkGoodAddr(host, S); |
2d8c0b1a | 1090 | callCallback(COMM_OK, 0); |
62e76326 | 1091 | break; |
1092 | ||
9d92af86 AJ |
1093 | #if USE_IPV6 |
1094 | case COMM_ERR_PROTOCOL: | |
1095 | /* problem using the desired protocol over this socket. | |
1096 | * count the connection attempt, reset the socket, and immediately try again */ | |
1097 | tries++; | |
1098 | commResetFD(); | |
1099 | connect(); | |
1100 | break; | |
1101 | #endif | |
1102 | ||
e5f6c5c2 | 1103 | default: |
f3767a6a | 1104 | debugs(5, 5, HERE "FD " << fd << ": * - try again"); |
2d8c0b1a | 1105 | tries++; |
cc192b50 | 1106 | ipcacheMarkBadAddr(host, S); |
62e76326 | 1107 | |
9b5c4a9a | 1108 | #if USE_ICMP |
62e76326 | 1109 | if (Config.onoff.test_reachability) |
cc192b50 | 1110 | netdbDeleteAddrNetwork(S); |
9b5c4a9a | 1111 | #endif |
62e76326 | 1112 | |
0b77ecd8 | 1113 | if (commRetryConnect()) { |
4ed0e075 | 1114 | eventAdd("commReconnect", commReconnect, this, this->addrcount == 1 ? 0.05 : 0.0, 0); |
62e76326 | 1115 | } else { |
f3767a6a | 1116 | debugs(5, 5, HERE << "FD " << fd << ": * - ERR tried too many times already."); |
2d8c0b1a | 1117 | callCallback(COMM_ERR_CONNECT, errno); |
62e76326 | 1118 | } |
090089c4 | 1119 | } |
090089c4 | 1120 | } |
b0469965 | 1121 | /* |
b8d8561b | 1122 | int |
b0469965 | 1123 | commSetTimeout_old(int fd, int timeout, PF * handler, void *data) |
090089c4 | 1124 | { |
f3767a6a | 1125 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
03eb2f01 | 1126 | assert(fd >= 0); |
1127 | assert(fd < Squid_MaxFD); | |
2d8c0b1a | 1128 | fde *F = &fd_table[fd]; |
60c0b5a2 | 1129 | assert(F->flags.open); |
62e76326 | 1130 | |
5c5783a2 | 1131 | if (timeout < 0) { |
62e76326 | 1132 | cbdataReferenceDone(F->timeout_data); |
1133 | F->timeout_handler = NULL; | |
1134 | F->timeout = 0; | |
5849612f | 1135 | } else { |
62e76326 | 1136 | if (handler) { |
1137 | cbdataReferenceDone(F->timeout_data); | |
1138 | F->timeout_handler = handler; | |
1139 | F->timeout_data = cbdataReference(data); | |
1140 | } | |
1141 | ||
1142 | F->timeout = squid_curtime + (time_t) timeout; | |
30a4f2a8 | 1143 | } |
62e76326 | 1144 | |
a3fa14bf | 1145 | return F->timeout; |
090089c4 | 1146 | } |
b0469965 | 1147 | */ |
1148 | ||
1149 | int | |
1150 | commSetTimeout(int fd, int timeout, PF * handler, void *data) | |
1151 | { | |
1152 | AsyncCall::Pointer call; | |
f3767a6a | 1153 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
9e008dda AJ |
1154 | if (handler != NULL) |
1155 | call=commCbCall(5,4, "SomeTimeoutHandler", CommTimeoutCbPtrFun(handler, data)); | |
b0469965 | 1156 | else |
9e008dda | 1157 | call = NULL; |
b0469965 | 1158 | return commSetTimeout(fd, timeout, call); |
1159 | } | |
1160 | ||
1161 | ||
1162 | int commSetTimeout(int fd, int timeout, AsyncCall::Pointer &callback) | |
1163 | { | |
f3767a6a | 1164 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
b0469965 | 1165 | assert(fd >= 0); |
1166 | assert(fd < Squid_MaxFD); | |
1167 | fde *F = &fd_table[fd]; | |
1168 | assert(F->flags.open); | |
1169 | ||
1170 | if (timeout < 0) { | |
1171 | F->timeoutHandler = NULL; | |
1172 | F->timeout = 0; | |
1173 | } else { | |
1174 | if (callback != NULL) { | |
9e008dda AJ |
1175 | typedef CommTimeoutCbParams Params; |
1176 | Params ¶ms = GetCommParams<Params>(callback); | |
1177 | params.fd = fd; | |
b0469965 | 1178 | F->timeoutHandler = callback; |
1179 | } | |
1180 | ||
1181 | F->timeout = squid_curtime + (time_t) timeout; | |
1182 | } | |
1183 | ||
1184 | return F->timeout; | |
1185 | ||
1186 | } | |
090089c4 | 1187 | |
b8d8561b | 1188 | int |
ad61a2b4 | 1189 | comm_connect_addr(int sock, const IpAddress &address) |
090089c4 | 1190 | { |
3d7e9d7c | 1191 | comm_err_t status = COMM_OK; |
76f87348 | 1192 | fde *F = &fd_table[sock]; |
cc192b50 | 1193 | int x = 0; |
b5568a61 | 1194 | int err = 0; |
9689d97c | 1195 | socklen_t errlen; |
feca3b9a | 1196 | struct addrinfo *AI = NULL; |
88bfe092 | 1197 | PROF_start(comm_connect_addr); |
cc192b50 | 1198 | |
1199 | assert(address.GetPort() != 0); | |
1200 | ||
b0469965 | 1201 | debugs(5, 9, "comm_connect_addr: connecting socket " << sock << " to " << address << " (want family: " << F->sock_family << ")"); |
cc192b50 | 1202 | |
9d92af86 AJ |
1203 | /* BUG 2222 FIX: reset the FD when its found to be IPv4 in IPv6 mode */ |
1204 | /* inverse case of IPv4 failing to connect on IPv6 socket is handeld post-connect. | |
1205 | * this case must presently be handled here since the GetAddrInfo asserts on bad mappings. | |
1206 | * eventually we want it to throw a Must() that gets handled there instead of this if. | |
1207 | * NP: because commresetFD is private to ConnStateData we have to return an error and | |
1208 | * trust its handled properly. | |
1209 | */ | |
1210 | #if USE_IPV6 | |
9e008dda | 1211 | if (F->sock_family == AF_INET && !address.IsIPv4()) { |
9d92af86 AJ |
1212 | return COMM_ERR_PROTOCOL; |
1213 | } | |
1214 | #endif | |
1215 | ||
feca3b9a | 1216 | address.GetAddrInfo(AI, F->sock_family); |
cc192b50 | 1217 | |
090089c4 | 1218 | /* Establish connection. */ |
b5568a61 | 1219 | errno = 0; |
62e76326 | 1220 | |
9e008dda | 1221 | if (!F->flags.called_connect) { |
62e76326 | 1222 | F->flags.called_connect = 1; |
1223 | statCounter.syscalls.sock.connects++; | |
1224 | ||
feca3b9a | 1225 | x = connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 1226 | |
5a33a66a | 1227 | // XXX: ICAP code refuses callbacks during a pending comm_ call |
1228 | // Async calls development will fix this. | |
1229 | if (x == 0) { | |
1230 | x = -1; | |
1231 | errno = EINPROGRESS; | |
1232 | } | |
1233 | ||
9e008dda | 1234 | if (x < 0) { |
cc192b50 | 1235 | debugs(5,5, "comm_connect_addr: sock=" << sock << ", addrinfo( " << |
9e008dda AJ |
1236 | " flags=" << AI->ai_flags << |
1237 | ", family=" << AI->ai_family << | |
1238 | ", socktype=" << AI->ai_socktype << | |
1239 | ", protocol=" << AI->ai_protocol << | |
1240 | ", &addr=" << AI->ai_addr << | |
1241 | ", addrlen=" << AI->ai_addrlen << | |
1242 | " )" ); | |
cc192b50 | 1243 | debugs(5, 9, "connect FD " << sock << ": (" << x << ") " << xstrerror()); |
1244 | debugs(14,9, "connecting to: " << address ); | |
1245 | } | |
9e008dda | 1246 | } else { |
140e2c0b | 1247 | #if defined(_SQUID_NEWSOS6_) |
62e76326 | 1248 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
1249 | ||
feca3b9a | 1250 | connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 1251 | |
1252 | if (errno == EINVAL) { | |
1253 | errlen = sizeof(err); | |
1254 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1255 | ||
1256 | if (x >= 0) | |
1257 | errno = x; | |
1258 | } | |
1259 | ||
33ac9442 | 1260 | #else |
62e76326 | 1261 | errlen = sizeof(err); |
1262 | ||
1263 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1264 | ||
1265 | if (x == 0) | |
1266 | errno = err; | |
1267 | ||
b5568a61 | 1268 | #if defined(_SQUID_SOLARIS_) |
62e76326 | 1269 | /* |
1270 | * Solaris 2.4's socket emulation doesn't allow you | |
1271 | * to determine the error from a failed non-blocking | |
1272 | * connect and just returns EPIPE. Create a fake | |
1273 | * error message for connect. -- fenner@parc.xerox.com | |
1274 | */ | |
1275 | if (x < 0 && errno == EPIPE) | |
1276 | errno = ENOTCONN; | |
1277 | ||
33ac9442 | 1278 | #endif |
30a4f2a8 | 1279 | #endif |
62e76326 | 1280 | |
e5f6c5c2 | 1281 | } |
62e76326 | 1282 | |
9e008dda AJ |
1283 | /* Squid seems to be working fine without this code. With this code, |
1284 | * we leak memory on many connect requests because of EINPROGRESS. | |
1285 | * If you find that this code is needed, please file a bug report. */ | |
82ec8dfc | 1286 | #if 0 |
feca3b9a AJ |
1287 | #ifdef _SQUID_LINUX_ |
1288 | /* 2007-11-27: | |
9e008dda | 1289 | * Linux Debian replaces our allocated AI pointer with garbage when |
feca3b9a AJ |
1290 | * connect() fails. This leads to segmentation faults deallocating |
1291 | * the system-allocated memory when we go to clean up our pointer. | |
1292 | * HACK: is to leak the memory returned since we can't deallocate. | |
1293 | */ | |
9e008dda | 1294 | if (errno != 0) { |
feca3b9a AJ |
1295 | AI = NULL; |
1296 | } | |
82ec8dfc | 1297 | #endif |
feca3b9a AJ |
1298 | #endif |
1299 | ||
1300 | address.FreeAddrInfo(AI); | |
1301 | ||
88bfe092 | 1302 | PROF_stop(comm_connect_addr); |
62e76326 | 1303 | |
b5568a61 | 1304 | if (errno == 0 || errno == EISCONN) |
62e76326 | 1305 | status = COMM_OK; |
b5568a61 | 1306 | else if (ignoreErrno(errno)) |
62e76326 | 1307 | status = COMM_INPROGRESS; |
b5568a61 | 1308 | else |
cc192b50 | 1309 | #if USE_IPV6 |
9e008dda | 1310 | if ( address.IsIPv4() && F->sock_family == AF_INET6 ) { |
cc192b50 | 1311 | |
1312 | /* failover to trying IPv4-only link if an IPv6 one fails */ | |
1313 | /* to catch the edge case of apps listening on IPv4-localhost */ | |
9e008dda AJ |
1314 | F->sock_family = AF_INET; |
1315 | int res = comm_connect_addr(sock, address); | |
cc192b50 | 1316 | |
9e008dda AJ |
1317 | /* if that fails too, undo our temporary socktype hack so the repeat works properly. */ |
1318 | if (res == COMM_ERROR) | |
1319 | F->sock_family = AF_INET6; | |
cc192b50 | 1320 | |
9e008dda AJ |
1321 | return res; |
1322 | } else | |
cc192b50 | 1323 | #endif |
9e008dda | 1324 | return COMM_ERROR; |
62e76326 | 1325 | |
cc192b50 | 1326 | address.NtoA(F->ipaddr, MAX_IPSTRLEN); |
62e76326 | 1327 | |
cc192b50 | 1328 | F->remote_port = address.GetPort(); /* remote_port is HS */ |
62e76326 | 1329 | |
9e008dda | 1330 | if (status == COMM_OK) { |
cc192b50 | 1331 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connected to " << address); |
9e008dda | 1332 | } else if (status == COMM_INPROGRESS) { |
bf8fe701 | 1333 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 1334 | } |
62e76326 | 1335 | |
090089c4 | 1336 | return status; |
1337 | } | |
1338 | ||
1339 | /* Wait for an incoming connection on FD. FD should be a socket returned | |
1340 | * from comm_listen. */ | |
ee0989f2 | 1341 | static int |
1342 | comm_old_accept(int fd, ConnectionDetail &details) | |
090089c4 | 1343 | { |
88bfe092 | 1344 | PROF_start(comm_accept); |
ee0989f2 | 1345 | statCounter.syscalls.sock.accepts++; |
1346 | int sock; | |
cc192b50 | 1347 | struct addrinfo *gai = NULL; |
1348 | details.me.InitAddrInfo(gai); | |
1349 | ||
1350 | if ((sock = accept(fd, gai->ai_addr, &gai->ai_addrlen)) < 0) { | |
1351 | ||
1352 | details.me.FreeAddrInfo(gai); | |
62e76326 | 1353 | |
62e76326 | 1354 | PROF_stop(comm_accept); |
1355 | ||
9e008dda | 1356 | if (ignoreErrno(errno)) { |
bf8fe701 | 1357 | debugs(50, 5, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1358 | return COMM_NOMESSAGE; |
9e008dda | 1359 | } else if (ENFILE == errno || EMFILE == errno) { |
bf8fe701 | 1360 | debugs(50, 3, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1361 | return COMM_ERROR; |
9e008dda | 1362 | } else { |
bf8fe701 | 1363 | debugs(50, 1, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1364 | return COMM_ERROR; |
1365 | } | |
090089c4 | 1366 | } |
62e76326 | 1367 | |
cc192b50 | 1368 | details.peer = *gai; |
1369 | ||
3be4d5d1 | 1370 | details.me.InitAddrInfo(gai); |
1371 | ||
cc192b50 | 1372 | details.me.SetEmpty(); |
1373 | getsockname(sock, gai->ai_addr, &gai->ai_addrlen); | |
1374 | details.me = *gai; | |
62e76326 | 1375 | |
3ca60c86 | 1376 | commSetCloseOnExec(sock); |
cc192b50 | 1377 | |
090089c4 | 1378 | /* fdstat update */ |
5c5783a2 | 1379 | fd_open(sock, FD_SOCKET, "HTTP Request"); |
c4b7a5a9 | 1380 | fdd_table[sock].close_file = NULL; |
1381 | fdd_table[sock].close_line = 0; | |
ee0989f2 | 1382 | fde *F = &fd_table[sock]; |
cc192b50 | 1383 | details.peer.NtoA(F->ipaddr,MAX_IPSTRLEN); |
1384 | F->remote_port = details.peer.GetPort(); | |
1385 | F->local_addr.SetPort(details.me.GetPort()); | |
3be4d5d1 | 1386 | #if USE_IPV6 |
1387 | F->sock_family = AF_INET; | |
1388 | #else | |
1389 | F->sock_family = details.me.IsIPv4()?AF_INET:AF_INET6; | |
1390 | #endif | |
1391 | details.me.FreeAddrInfo(gai); | |
cc192b50 | 1392 | |
090089c4 | 1393 | commSetNonBlocking(sock); |
cc192b50 | 1394 | |
acaa7194 AJ |
1395 | /* IFF the socket is (tproxy) transparent, pass the flag down to allow spoofing */ |
1396 | F->flags.transparent = fd_table[fd].flags.transparent; | |
72d57dea | 1397 | |
88bfe092 | 1398 | PROF_stop(comm_accept); |
090089c4 | 1399 | return sock; |
1400 | } | |
1401 | ||
cb201b7e | 1402 | void |
1403 | commCallCloseHandlers(int fd) | |
1404 | { | |
76f87348 | 1405 | fde *F = &fd_table[fd]; |
bf8fe701 | 1406 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 1407 | |
8000a965 | 1408 | while (F->closeHandler != NULL) { |
b0469965 | 1409 | AsyncCall::Pointer call = F->closeHandler; |
9e008dda AJ |
1410 | F->closeHandler = call->Next(); |
1411 | call->setNext(NULL); | |
1412 | // If call is not canceled schedule it for execution else ignore it | |
1413 | if (!call->canceled()) { | |
1414 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << call); | |
1415 | typedef CommCloseCbParams Params; | |
1416 | Params ¶ms = GetCommParams<Params>(call); | |
1417 | params.fd = fd; | |
1418 | ScheduleCallHere(call); | |
1419 | } | |
cb201b7e | 1420 | } |
1421 | } | |
1422 | ||
5492ad1d | 1423 | #if LINGERING_CLOSE |
1424 | static void | |
1425 | commLingerClose(int fd, void *unused) | |
1426 | { | |
1427 | LOCAL_ARRAY(char, buf, 1024); | |
1428 | int n; | |
1f7c9178 | 1429 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 1430 | |
5492ad1d | 1431 | if (n < 0) |
bf8fe701 | 1432 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1433 | |
5492ad1d | 1434 | comm_close(fd); |
1435 | } | |
1436 | ||
1437 | static void | |
1438 | commLingerTimeout(int fd, void *unused) | |
1439 | { | |
bf8fe701 | 1440 | debugs(5, 3, "commLingerTimeout: FD " << fd); |
5492ad1d | 1441 | comm_close(fd); |
1442 | } | |
1443 | ||
1444 | /* | |
1445 | * Inspired by apache | |
1446 | */ | |
1447 | void | |
1448 | comm_lingering_close(int fd) | |
1449 | { | |
d4c19b39 | 1450 | #if USE_SSL |
62e76326 | 1451 | |
d4c19b39 | 1452 | if (fd_table[fd].ssl) |
62e76326 | 1453 | ssl_shutdown_method(fd); |
1454 | ||
d4c19b39 | 1455 | #endif |
62e76326 | 1456 | |
5492ad1d | 1457 | if (shutdown(fd, 1) < 0) { |
62e76326 | 1458 | comm_close(fd); |
1459 | return; | |
5492ad1d | 1460 | } |
62e76326 | 1461 | |
5492ad1d | 1462 | fd_note(fd, "lingering close"); |
1463 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
1464 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
1465 | } | |
62e76326 | 1466 | |
5492ad1d | 1467 | #endif |
1468 | ||
98264874 | 1469 | /* |
1470 | * enable linger with time of 0 so that when the socket is | |
1471 | * closed, TCP generates a RESET | |
1472 | */ | |
1473 | void | |
1474 | comm_reset_close(int fd) | |
1475 | { | |
62e76326 | 1476 | |
98264874 | 1477 | struct linger L; |
1478 | L.l_onoff = 1; | |
1479 | L.l_linger = 0; | |
62e76326 | 1480 | |
98264874 | 1481 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1482 | debugs(50, 0, "commResetTCPClose: FD " << fd << ": " << xstrerror()); |
62e76326 | 1483 | |
98264874 | 1484 | comm_close(fd); |
1485 | } | |
1486 | ||
9e008dda | 1487 | void |
10b06767 AJ |
1488 | comm_close_start(int fd, void *data) |
1489 | { | |
10b06767 | 1490 | #if USE_SSL |
86dedcc1 | 1491 | fde *F = &fd_table[fd]; |
10b06767 AJ |
1492 | if (F->ssl) |
1493 | ssl_shutdown_method(fd); | |
1494 | ||
1495 | #endif | |
1496 | ||
1497 | } | |
1498 | ||
1499 | ||
9e008dda | 1500 | void |
b0469965 | 1501 | comm_close_complete(int fd, void *data) |
2d8c0b1a | 1502 | { |
b0469965 | 1503 | #if USE_SSL |
1504 | fde *F = &fd_table[fd]; | |
2d8c0b1a | 1505 | |
b0469965 | 1506 | if (F->ssl) { |
1507 | SSL_free(F->ssl); | |
1508 | F->ssl = NULL; | |
1509 | } | |
2d8c0b1a | 1510 | |
b0469965 | 1511 | #endif |
1512 | fd_close(fd); /* update fdstat */ | |
1513 | ||
1514 | close(fd); | |
1515 | ||
b0469965 | 1516 | fdc_table[fd] = AcceptFD(fd); |
1517 | ||
1518 | statCounter.syscalls.sock.closes++; | |
1519 | ||
1520 | /* When an fd closes, give accept() a chance, if need be */ | |
1521 | ||
1522 | if (fdNFree() >= RESERVED_FD) | |
1523 | AcceptLimiter::Instance().kick(); | |
2d8c0b1a | 1524 | |
2d8c0b1a | 1525 | } |
c4b7a5a9 | 1526 | |
1527 | /* | |
1528 | * Close the socket fd. | |
1529 | * | |
1530 | * + call write handlers with ERR_CLOSING | |
1531 | * + call read handlers with ERR_CLOSING | |
1532 | * + call closing handlers | |
a46d2c0e | 1533 | * |
9e008dda | 1534 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a |
a46d2c0e | 1535 | * DeferredReadManager. |
c4b7a5a9 | 1536 | */ |
b8d8561b | 1537 | void |
43ae1d95 | 1538 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1539 | { |
82ec8dfc | 1540 | debugs(5, 3, "comm_close: start closing FD " << fd); |
03eb2f01 | 1541 | assert(fd >= 0); |
1542 | assert(fd < Squid_MaxFD); | |
82ec8dfc AR |
1543 | |
1544 | fde *F = &fd_table[fd]; | |
c4b7a5a9 | 1545 | fdd_table[fd].close_file = file; |
1546 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1547 | |
82ec8dfc | 1548 | if (F->closing()) |
62e76326 | 1549 | return; |
1550 | ||
36afac26 | 1551 | /* XXX: is this obsolete behind F->closing() ? */ |
b8869bcf | 1552 | if ( (shutting_down || reconfiguring) && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1553 | return; |
1554 | ||
c4b7a5a9 | 1555 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
b0469965 | 1556 | assert(isOpen(fd)); |
62e76326 | 1557 | |
76f87348 | 1558 | assert(F->type != FD_FILE); |
62e76326 | 1559 | |
88bfe092 | 1560 | PROF_start(comm_close); |
62e76326 | 1561 | |
10b06767 | 1562 | F->flags.close_request = 1; |
62e76326 | 1563 | |
10b06767 | 1564 | AsyncCall::Pointer startCall=commCbCall(5,4, "comm_close_start", |
9e008dda | 1565 | CommCloseCbPtrFun(comm_close_start, NULL)); |
10b06767 AJ |
1566 | typedef CommCloseCbParams Params; |
1567 | Params &startParams = GetCommParams<Params>(startCall); | |
1568 | startParams.fd = fd; | |
1569 | ScheduleCallHere(startCall); | |
62e76326 | 1570 | |
74257126 AR |
1571 | // a half-closed fd may lack a reader, so we stop monitoring explicitly |
1572 | if (commHasHalfClosedMonitor(fd)) | |
1573 | commStopHalfClosedMonitor(fd); | |
fa80a8ef | 1574 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1575 | |
82ec8dfc | 1576 | // notify read/write handlers |
2b663917 | 1577 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { |
b0469965 | 1578 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1579 | } |
1580 | if (commio_has_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd))) { | |
b0469965 | 1581 | commio_finish_callback(fd, COMMIO_FD_READCB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1582 | } |
2d8c0b1a | 1583 | |
82ec8dfc | 1584 | // notify accept handlers |
b0469965 | 1585 | fdc_table[fd].notify(-1, COMM_ERR_CLOSING, 0, ConnectionDetail()); |
c4b7a5a9 | 1586 | |
cb201b7e | 1587 | commCallCloseHandlers(fd); |
62e76326 | 1588 | |
781ce8ff | 1589 | if (F->pconn.uses) |
1590 | F->pconn.pool->count(F->pconn.uses); | |
62e76326 | 1591 | |
a7ad6e4e | 1592 | comm_empty_os_read_buffers(fd); |
9e008dda | 1593 | |
62e76326 | 1594 | |
10b06767 | 1595 | AsyncCall::Pointer completeCall=commCbCall(5,4, "comm_close_complete", |
9e008dda | 1596 | CommCloseCbPtrFun(comm_close_complete, NULL)); |
10b06767 AJ |
1597 | Params &completeParams = GetCommParams<Params>(completeCall); |
1598 | completeParams.fd = fd; | |
9e008dda | 1599 | // must use async call to wait for all callbacks |
82ec8dfc | 1600 | // scheduled before comm_close() to finish |
10b06767 | 1601 | ScheduleCallHere(completeCall); |
62e76326 | 1602 | |
88bfe092 | 1603 | PROF_stop(comm_close); |
090089c4 | 1604 | } |
1605 | ||
090089c4 | 1606 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1607 | int |
5df61230 | 1608 | comm_udp_sendto(int fd, |
ad61a2b4 | 1609 | const IpAddress &to_addr, |
62e76326 | 1610 | const void *buf, |
1611 | int len) | |
090089c4 | 1612 | { |
cc192b50 | 1613 | int x = 0; |
1614 | struct addrinfo *AI = NULL; | |
1615 | ||
88bfe092 | 1616 | PROF_start(comm_udp_sendto); |
83704487 | 1617 | statCounter.syscalls.sock.sendtos++; |
62e76326 | 1618 | |
cc192b50 | 1619 | debugs(50, 3, "comm_udp_sendto: Attempt to send UDP packet to " << to_addr << |
9e008dda | 1620 | " using FD " << fd << " using Port " << comm_local_port(fd) ); |
cc192b50 | 1621 | |
1622 | /* BUG: something in the above macro appears to occasionally be setting AI to garbage. */ | |
1623 | /* AYJ: 2007-08-27 : or was it because I wasn't then setting 'fd_table[fd].sock_family' to fill properly. */ | |
1624 | assert( NULL == AI ); | |
1625 | ||
1626 | to_addr.GetAddrInfo(AI, fd_table[fd].sock_family); | |
1627 | ||
1628 | x = sendto(fd, buf, len, 0, AI->ai_addr, AI->ai_addrlen); | |
1629 | ||
1630 | to_addr.FreeAddrInfo(AI); | |
1631 | ||
88bfe092 | 1632 | PROF_stop(comm_udp_sendto); |
62e76326 | 1633 | |
2d8c0b1a | 1634 | if (x >= 0) |
1635 | return x; | |
1636 | ||
17d51783 | 1637 | #ifdef _SQUID_LINUX_ |
62e76326 | 1638 | |
2d8c0b1a | 1639 | if (ECONNREFUSED != errno) |
17d51783 | 1640 | #endif |
62e76326 | 1641 | |
cc192b50 | 1642 | debugs(50, 1, "comm_udp_sendto: FD " << fd << ", (family=" << fd_table[fd].sock_family << ") " << to_addr << ": " << xstrerror()); |
62e76326 | 1643 | |
2d8c0b1a | 1644 | return COMM_ERROR; |
090089c4 | 1645 | } |
1646 | ||
b8d8561b | 1647 | void |
582b6456 | 1648 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 1649 | { |
bf8fe701 | 1650 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1651 | handler << ", data=" << data); | |
62e76326 | 1652 | |
b0469965 | 1653 | AsyncCall::Pointer call=commCbCall(5,4, "SomeCloseHandler", |
9e008dda | 1654 | CommCloseCbPtrFun(handler, data)); |
b0469965 | 1655 | comm_add_close_handler(fd, call); |
1656 | } | |
62e76326 | 1657 | |
b0469965 | 1658 | void |
1659 | comm_add_close_handler(int fd, AsyncCall::Pointer &call) | |
1660 | { | |
1661 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1662 | |
b0469965 | 1663 | /*TODO:Check for a similar scheduled AsyncCall*/ |
1664 | // for (c = fd_table[fd].closeHandler; c; c = c->next) | |
1665 | // assert(c->handler != handler || c->data != data); | |
62e76326 | 1666 | |
b0469965 | 1667 | call->setNext(fd_table[fd].closeHandler); |
62e76326 | 1668 | |
b0469965 | 1669 | fd_table[fd].closeHandler = call; |
30a4f2a8 | 1670 | } |
1671 | ||
b0469965 | 1672 | |
1673 | // remove function-based close handler | |
b8d8561b | 1674 | void |
582b6456 | 1675 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 1676 | { |
b0469965 | 1677 | assert (isOpen(fd)); |
30a4f2a8 | 1678 | /* Find handler in list */ |
bf8fe701 | 1679 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1680 | handler << ", data=" << data); | |
62e76326 | 1681 | |
b0469965 | 1682 | AsyncCall::Pointer p; |
9e008dda | 1683 | for (p = fd_table[fd].closeHandler; p != NULL; p = p->Next()) { |
b0469965 | 1684 | typedef CommCbFunPtrCallT<CommCloseCbPtrFun> Call; |
1685 | const Call *call = dynamic_cast<const Call*>(p.getRaw()); | |
1686 | if (!call) // method callbacks have their own comm_remove_close_handler | |
1687 | continue; | |
62e76326 | 1688 | |
b0469965 | 1689 | typedef CommCloseCbParams Params; |
1690 | const Params ¶ms = GetCommParams<Params>(p); | |
1691 | if (call->dialer.handler == handler && params.data == data) | |
1692 | break; /* This is our handler */ | |
1693 | } | |
7828df5b CT |
1694 | |
1695 | // comm_close removes all close handlers so our handler may be gone | |
1696 | if (p != NULL) | |
1697 | p->cancel("comm_remove_close_handler"); | |
1698 | // TODO: should we remove the handler from the close handlers list? | |
b0469965 | 1699 | } |
62e76326 | 1700 | |
b0469965 | 1701 | // remove method-based close handler |
1702 | void | |
1703 | comm_remove_close_handler(int fd, AsyncCall::Pointer &call) | |
1704 | { | |
1705 | assert (isOpen(fd)); | |
b0469965 | 1706 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", AsyncCall=" << call); |
62e76326 | 1707 | |
7828df5b CT |
1708 | // comm_close removes all close handlers so our handler may be gone |
1709 | // TODO: should we remove the handler from the close handlers list? | |
1710 | #if 0 | |
b0469965 | 1711 | // Check to see if really exist the given AsyncCall in comm_close handlers |
1712 | // TODO: optimize: this slow code is only needed for the assert() below | |
1713 | AsyncCall::Pointer p; | |
1714 | for (p = fd_table[fd].closeHandler; p != NULL && p != call; p = p->Next()); | |
1715 | assert(p == call); | |
7828df5b | 1716 | #endif |
62e76326 | 1717 | |
b0469965 | 1718 | call->cancel("comm_remove_close_handler"); |
30a4f2a8 | 1719 | } |
090089c4 | 1720 | |
b8d8561b | 1721 | static void |
1722 | commSetNoLinger(int fd) | |
30a4f2a8 | 1723 | { |
62e76326 | 1724 | |
30a4f2a8 | 1725 | struct linger L; |
090089c4 | 1726 | L.l_onoff = 0; /* off */ |
1727 | L.l_linger = 0; | |
62e76326 | 1728 | |
30a4f2a8 | 1729 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1730 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1731 | |
58a6c186 | 1732 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1733 | } |
1734 | ||
b8d8561b | 1735 | static void |
1736 | commSetReuseAddr(int fd) | |
090089c4 | 1737 | { |
1738 | int on = 1; | |
62e76326 | 1739 | |
30a4f2a8 | 1740 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1741 | debugs(50, 1, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1742 | } |
1743 | ||
b8d8561b | 1744 | static void |
1745 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1746 | { |
1747 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
bf8fe701 | 1748 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1749 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)) < 0) |
1750 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1751 | #ifdef TCP_WINDOW_CLAMP | |
1752 | if (setsockopt(fd, SOL_TCP, TCP_WINDOW_CLAMP, (char *) &size, sizeof(size)) < 0) | |
1753 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1754 | #endif | |
f868539a | 1755 | } |
1756 | ||
b8d8561b | 1757 | int |
1758 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1759 | { |
a50bfe93 | 1760 | #ifndef _SQUID_MSWIN_ |
731e4d49 | 1761 | int flags; |
9e205701 | 1762 | int dummy = 0; |
a50bfe93 | 1763 | #endif |
ec4daaa5 | 1764 | #ifdef _SQUID_WIN32_ |
62e76326 | 1765 | |
b05490a8 | 1766 | int nonblocking = TRUE; |
62e76326 | 1767 | |
629b5f75 | 1768 | #ifdef _SQUID_CYGWIN_ |
1769 | ||
7f6ffd15 | 1770 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1771 | #endif |
1772 | ||
62e76326 | 1773 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1774 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1775 | return COMM_ERROR; |
1776 | } | |
629b5f75 | 1777 | |
1778 | #ifdef _SQUID_CYGWIN_ | |
1779 | ||
7f6ffd15 | 1780 | } else { |
1781 | #endif | |
629b5f75 | 1782 | #endif |
a50bfe93 | 1783 | #ifndef _SQUID_MSWIN_ |
62e76326 | 1784 | |
1785 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1786 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1787 | return COMM_ERROR; |
1788 | } | |
1789 | ||
1790 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1791 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1792 | return COMM_ERROR; |
1793 | } | |
1794 | ||
a50bfe93 | 1795 | #endif |
629b5f75 | 1796 | #ifdef _SQUID_CYGWIN_ |
62e76326 | 1797 | |
090089c4 | 1798 | } |
62e76326 | 1799 | |
7f6ffd15 | 1800 | #endif |
58a6c186 | 1801 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1802 | |
090089c4 | 1803 | return 0; |
1804 | } | |
1805 | ||
7e3ce7b9 | 1806 | int |
1807 | commUnsetNonBlocking(int fd) | |
1808 | { | |
a50bfe93 | 1809 | #ifdef _SQUID_MSWIN_ |
1810 | int nonblocking = FALSE; | |
1811 | ||
1812 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1813 | #else | |
7e3ce7b9 | 1814 | int flags; |
1815 | int dummy = 0; | |
62e76326 | 1816 | |
7e3ce7b9 | 1817 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1818 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1819 | return COMM_ERROR; |
7e3ce7b9 | 1820 | } |
62e76326 | 1821 | |
7e3ce7b9 | 1822 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1823 | #endif |
bf8fe701 | 1824 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1825 | return COMM_ERROR; |
7e3ce7b9 | 1826 | } |
62e76326 | 1827 | |
7e3ce7b9 | 1828 | fd_table[fd].flags.nonblocking = 0; |
1829 | return 0; | |
1830 | } | |
1831 | ||
b8d8561b | 1832 | void |
a50bfe93 | 1833 | commSetCloseOnExec(int fd) { |
3ca60c86 | 1834 | #ifdef FD_CLOEXEC |
731e4d49 | 1835 | int flags; |
7a18b487 | 1836 | int dummy = 0; |
62e76326 | 1837 | |
c7989865 | 1838 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1839 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1840 | return; |
3ca60c86 | 1841 | } |
62e76326 | 1842 | |
24382924 | 1843 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1844 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1845 | |
d6827718 | 1846 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1847 | |
3ca60c86 | 1848 | #endif |
1849 | } | |
1850 | ||
e90100aa | 1851 | #ifdef TCP_NODELAY |
1852 | static void | |
a50bfe93 | 1853 | commSetTcpNoDelay(int fd) { |
e90100aa | 1854 | int on = 1; |
62e76326 | 1855 | |
e90100aa | 1856 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1857 | debugs(50, 1, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1858 | |
d6827718 | 1859 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1860 | } |
62e76326 | 1861 | |
e90100aa | 1862 | #endif |
1863 | ||
b2130d58 | 1864 | void |
9e008dda | 1865 | commSetTcpKeepalive(int fd, int idle, int interval, int timeout) { |
b2130d58 | 1866 | int on = 1; |
1867 | #ifdef TCP_KEEPCNT | |
1868 | if (timeout && interval) { | |
9e008dda AJ |
1869 | int count = (timeout + interval - 1) / interval; |
1870 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &count, sizeof(on)) < 0) | |
1871 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1872 | } |
1873 | #endif | |
1874 | #ifdef TCP_KEEPIDLE | |
1875 | if (idle) { | |
9e008dda AJ |
1876 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(on)) < 0) |
1877 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1878 | } |
1879 | #endif | |
1880 | #ifdef TCP_KEEPINTVL | |
1881 | if (interval) { | |
9e008dda AJ |
1882 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval, sizeof(on)) < 0) |
1883 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1884 | } |
1885 | #endif | |
1886 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) < 0) | |
9e008dda | 1887 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1888 | } |
6a988308 | 1889 | |
d86b3703 | 1890 | void |
a50bfe93 | 1891 | comm_init(void) { |
c4b7a5a9 | 1892 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1893 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1894 | |
b0469965 | 1895 | fdc_table = new AcceptFD[Squid_MaxFD]; |
2b663917 | 1896 | for (int pos = 0; pos < Squid_MaxFD; ++pos) { |
b0469965 | 1897 | fdc_table[pos] = AcceptFD(pos); |
2b663917 | 1898 | } |
b0469965 | 1899 | |
1900 | commfd_table = (comm_fd_t *) xcalloc(Squid_MaxFD, sizeof(comm_fd_t)); | |
2b663917 | 1901 | for (int pos = 0; pos < Squid_MaxFD; pos++) { |
9e008dda AJ |
1902 | commfd_table[pos].fd = pos; |
1903 | commfd_table[pos].readcb.fd = pos; | |
1904 | commfd_table[pos].readcb.type = IOCB_READ; | |
1905 | commfd_table[pos].writecb.fd = pos; | |
1906 | commfd_table[pos].writecb.type = IOCB_WRITE; | |
2b663917 | 1907 | } |
2d8c0b1a | 1908 | |
59c4d35b | 1909 | /* XXX account fd_table */ |
090089c4 | 1910 | /* Keep a few file descriptors free so that we don't run out of FD's |
1911 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1912 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
d85c3078 | 1913 | RESERVED_FD = min(100, Squid_MaxFD / 4); |
2d8c0b1a | 1914 | |
04eb0689 | 1915 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
74257126 AR |
1916 | |
1917 | TheHalfClosed = new DescriptorSet; | |
090089c4 | 1918 | } |
1919 | ||
236d1779 | 1920 | void |
1921 | comm_exit(void) { | |
74257126 AR |
1922 | delete TheHalfClosed; |
1923 | TheHalfClosed = NULL; | |
1924 | ||
236d1779 | 1925 | safe_free(fd_table); |
1926 | safe_free(fdd_table); | |
1927 | if (fdc_table) { | |
9e008dda AJ |
1928 | delete[] fdc_table; |
1929 | fdc_table = NULL; | |
236d1779 | 1930 | } |
1931 | safe_free(commfd_table); | |
1932 | } | |
1933 | ||
30a4f2a8 | 1934 | /* Write to FD. */ |
b8d8561b | 1935 | static void |
a50bfe93 | 1936 | commHandleWrite(int fd, void *data) { |
2b663917 | 1937 | comm_io_callback_t *state = (comm_io_callback_t *)data; |
30a4f2a8 | 1938 | int len = 0; |
1939 | int nleft; | |
1940 | ||
2b663917 | 1941 | assert(state == COMMIO_FD_WRITECB(fd)); |
1942 | ||
88bfe092 | 1943 | PROF_start(commHandleWrite); |
bf8fe701 | 1944 | debugs(5, 5, "commHandleWrite: FD " << fd << ": off " << |
1945 | (long int) state->offset << ", sz " << (long int) state->size << "."); | |
30a4f2a8 | 1946 | |
1947 | nleft = state->size - state->offset; | |
1f7c9178 | 1948 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
bf8fe701 | 1949 | debugs(5, 5, "commHandleWrite: write() returns " << len); |
b69f7771 | 1950 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 1951 | statCounter.syscalls.sock.writes++; |
30a4f2a8 | 1952 | |
1953 | if (len == 0) { | |
62e76326 | 1954 | /* Note we even call write if nleft == 0 */ |
1955 | /* We're done */ | |
1956 | ||
1957 | if (nleft != 0) | |
bf8fe701 | 1958 | debugs(5, 1, "commHandleWrite: FD " << fd << ": write failure: connection closed with " << nleft << " bytes remaining."); |
62e76326 | 1959 | |
b0469965 | 1960 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
30a4f2a8 | 1961 | } else if (len < 0) { |
62e76326 | 1962 | /* An error */ |
1963 | ||
1964 | if (fd_table[fd].flags.socket_eof) { | |
bf8fe701 | 1965 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1966 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1967 | } else if (ignoreErrno(errno)) { |
bf8fe701 | 1968 | debugs(50, 10, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
62e76326 | 1969 | commSetSelect(fd, |
1970 | COMM_SELECT_WRITE, | |
1971 | commHandleWrite, | |
1972 | state, | |
1973 | 0); | |
1974 | } else { | |
bf8fe701 | 1975 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1976 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1977 | } |
30a4f2a8 | 1978 | } else { |
62e76326 | 1979 | /* A successful write, continue */ |
1980 | state->offset += len; | |
1981 | ||
57d55dfa | 1982 | if (state->offset < state->size) { |
62e76326 | 1983 | /* Not done, reinstall the write handler and write some more */ |
1984 | commSetSelect(fd, | |
1985 | COMM_SELECT_WRITE, | |
1986 | commHandleWrite, | |
1987 | state, | |
1988 | 0); | |
1989 | } else { | |
b0469965 | 1990 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_OK : COMM_ERROR, errno); |
62e76326 | 1991 | } |
30a4f2a8 | 1992 | } |
62e76326 | 1993 | |
88bfe092 | 1994 | PROF_stop(commHandleWrite); |
30a4f2a8 | 1995 | } |
1996 | ||
7cd8c414 | 1997 | /* |
1998 | * Queue a write. handler/handler_data are called when the write | |
1999 | * completes, on error, or on file descriptor close. | |
2000 | * | |
2001 | * free_func is used to free the passed buffer when the write has completed. | |
2002 | */ | |
b8d8561b | 2003 | void |
9e008dda | 2004 | comm_write(int fd, const char *buf, int size, IOCB * handler, void *handler_data, FREE * free_func) { |
b0469965 | 2005 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommWriteHander", |
9e008dda | 2006 | CommIoCbPtrFun(handler, handler_data)); |
b0469965 | 2007 | |
2008 | comm_write(fd, buf, size, call, free_func); | |
2009 | } | |
2010 | ||
2011 | void | |
9e008dda | 2012 | comm_write(int fd, const char *buf, int size, AsyncCall::Pointer &callback, FREE * free_func) { |
82ec8dfc | 2013 | debugs(5, 5, "comm_write: FD " << fd << ": sz " << size << ": asynCall " << callback); |
62e76326 | 2014 | |
82ec8dfc AR |
2015 | /* Make sure we are open, not closing, and not writing */ |
2016 | assert(isOpen(fd)); | |
2017 | assert(!fd_table[fd].closing()); | |
2018 | comm_io_callback_t *ccb = COMMIO_FD_WRITECB(fd); | |
2019 | assert(!ccb->active()); | |
b0469965 | 2020 | |
82ec8dfc AR |
2021 | /* Queue the write */ |
2022 | commio_set_callback(fd, IOCB_WRITE, ccb, callback, | |
9e008dda | 2023 | (char *)buf, free_func, size); |
82ec8dfc | 2024 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, ccb, 0); |
30a4f2a8 | 2025 | } |
26a880e2 | 2026 | |
b0469965 | 2027 | |
137ee196 | 2028 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 2029 | void |
2b663917 | 2030 | comm_write_mbuf(int fd, MemBuf *mb, IOCB * handler, void *handler_data) { |
2031 | comm_write(fd, mb->buf, mb->size, handler, handler_data, mb->freeFunc()); | |
cb69b4c7 | 2032 | } |
2033 | ||
b0469965 | 2034 | void |
2035 | comm_write_mbuf(int fd, MemBuf *mb, AsyncCall::Pointer &callback) { | |
2036 | comm_write(fd, mb->buf, mb->size, callback, mb->freeFunc()); | |
2037 | } | |
2038 | ||
c4b7a5a9 | 2039 | |
89924214 | 2040 | /* |
2041 | * hm, this might be too general-purpose for all the places we'd | |
2042 | * like to use it. | |
2043 | */ | |
b224ea98 | 2044 | int |
a50bfe93 | 2045 | ignoreErrno(int ierrno) { |
603500e7 | 2046 | switch (ierrno) { |
62e76326 | 2047 | |
89924214 | 2048 | case EINPROGRESS: |
62e76326 | 2049 | |
603500e7 | 2050 | case EWOULDBLOCK: |
26a880e2 | 2051 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 2052 | |
603500e7 | 2053 | case EAGAIN: |
26a880e2 | 2054 | #endif |
62e76326 | 2055 | |
603500e7 | 2056 | case EALREADY: |
62e76326 | 2057 | |
603500e7 | 2058 | case EINTR: |
db494ab8 | 2059 | #ifdef ERESTART |
62e76326 | 2060 | |
db494ab8 | 2061 | case ERESTART: |
2062 | #endif | |
62e76326 | 2063 | |
2064 | return 1; | |
2065 | ||
603500e7 | 2066 | default: |
62e76326 | 2067 | return 0; |
603500e7 | 2068 | } |
62e76326 | 2069 | |
603500e7 | 2070 | /* NOTREACHED */ |
26a880e2 | 2071 | } |
d723bf6b | 2072 | |
2073 | void | |
a50bfe93 | 2074 | commCloseAllSockets(void) { |
d723bf6b | 2075 | int fd; |
2076 | fde *F = NULL; | |
62e76326 | 2077 | |
d723bf6b | 2078 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2079 | F = &fd_table[fd]; |
2080 | ||
2081 | if (!F->flags.open) | |
2082 | continue; | |
2083 | ||
2084 | if (F->type != FD_SOCKET) | |
2085 | continue; | |
2086 | ||
2087 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
2088 | continue; | |
2089 | ||
b0469965 | 2090 | if (F->timeoutHandler != NULL) { |
2091 | AsyncCall::Pointer callback = F->timeoutHandler; | |
2092 | F->timeoutHandler = NULL; | |
bf8fe701 | 2093 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
9e008dda | 2094 | ScheduleCallHere(callback); |
62e76326 | 2095 | } else { |
bf8fe701 | 2096 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_close()"); |
62e76326 | 2097 | comm_close(fd); |
2098 | } | |
d723bf6b | 2099 | } |
2100 | } | |
1b3db6d9 | 2101 | |
2d8c0b1a | 2102 | static bool |
a50bfe93 | 2103 | AlreadyTimedOut(fde *F) { |
2d8c0b1a | 2104 | if (!F->flags.open) |
2105 | return true; | |
2106 | ||
2107 | if (F->timeout == 0) | |
2108 | return true; | |
2109 | ||
2110 | if (F->timeout > squid_curtime) | |
2111 | return true; | |
2112 | ||
2113 | return false; | |
2114 | } | |
2115 | ||
1b3db6d9 | 2116 | void |
a50bfe93 | 2117 | checkTimeouts(void) { |
1b3db6d9 | 2118 | int fd; |
2119 | fde *F = NULL; | |
b0469965 | 2120 | AsyncCall::Pointer callback; |
62e76326 | 2121 | |
1b3db6d9 | 2122 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2123 | F = &fd_table[fd]; |
2124 | ||
2d8c0b1a | 2125 | if (AlreadyTimedOut(F)) |
62e76326 | 2126 | continue; |
2127 | ||
9e008dda | 2128 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 2129 | |
b0469965 | 2130 | if (F->timeoutHandler != NULL) { |
bf8fe701 | 2131 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
b0469965 | 2132 | callback = F->timeoutHandler; |
2133 | F->timeoutHandler = NULL; | |
9e008dda | 2134 | ScheduleCallHere(callback); |
62e76326 | 2135 | } else { |
bf8fe701 | 2136 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 2137 | comm_close(fd); |
2138 | } | |
b5443c04 | 2139 | } |
2140 | } | |
2141 | ||
c4b7a5a9 | 2142 | /* |
2143 | * New-style listen and accept routines | |
2144 | * | |
2145 | * Listen simply registers our interest in an FD for listening, | |
2146 | * and accept takes a callback to call when an FD has been | |
2147 | * accept()ed. | |
2148 | */ | |
2149 | int | |
a50bfe93 | 2150 | comm_listen(int sock) { |
c4b7a5a9 | 2151 | int x; |
62e76326 | 2152 | |
c4b7a5a9 | 2153 | if ((x = listen(sock, Squid_MaxFD >> 2)) < 0) { |
bf8fe701 | 2154 | debugs(50, 0, "comm_listen: listen(" << (Squid_MaxFD >> 2) << ", " << sock << "): " << xstrerror()); |
62e76326 | 2155 | return x; |
c4b7a5a9 | 2156 | } |
62e76326 | 2157 | |
0b4d4be5 | 2158 | if (Config.accept_filter && strcmp(Config.accept_filter, "none") != 0) { |
cc9f92d4 | 2159 | #ifdef SO_ACCEPTFILTER |
9e008dda AJ |
2160 | struct accept_filter_arg afa; |
2161 | bzero(&afa, sizeof(afa)); | |
2162 | debugs(5, DBG_CRITICAL, "Installing accept filter '" << Config.accept_filter << "' on FD " << sock); | |
2163 | xstrncpy(afa.af_name, Config.accept_filter, sizeof(afa.af_name)); | |
2164 | x = setsockopt(sock, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)); | |
2165 | if (x < 0) | |
2166 | debugs(5, 0, "SO_ACCEPTFILTER '" << Config.accept_filter << "': '" << xstrerror()); | |
0b4d4be5 | 2167 | #elif defined(TCP_DEFER_ACCEPT) |
9e008dda AJ |
2168 | int seconds = 30; |
2169 | if (strncmp(Config.accept_filter, "data=", 5) == 0) | |
2170 | seconds = atoi(Config.accept_filter + 5); | |
2171 | x = setsockopt(sock, IPPROTO_TCP, TCP_DEFER_ACCEPT, &seconds, sizeof(seconds)); | |
2172 | if (x < 0) | |
2173 | debugs(5, 0, "TCP_DEFER_ACCEPT '" << Config.accept_filter << "': '" << xstrerror()); | |
0b4d4be5 | 2174 | #else |
9e008dda | 2175 | debugs(5, 0, "accept_filter not supported on your OS"); |
cc9f92d4 | 2176 | #endif |
0b4d4be5 | 2177 | } |
cc9f92d4 | 2178 | |
c4b7a5a9 | 2179 | return sock; |
2180 | } | |
2181 | ||
2d8c0b1a | 2182 | void |
b0469965 | 2183 | comm_accept(int fd, IOACB *handler, void *handler_data) { |
2184 | debugs(5, 5, "comm_accept: FD " << fd << " handler: " << (void*)handler); | |
2185 | assert(isOpen(fd)); | |
2186 | ||
2187 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommAcceptHandler", | |
9e008dda | 2188 | CommAcceptCbPtrFun(handler, handler_data)); |
b0469965 | 2189 | fdc_table[fd].subscribe(call); |
2d8c0b1a | 2190 | } |
c4b7a5a9 | 2191 | |
b0469965 | 2192 | void |
2193 | comm_accept(int fd, AsyncCall::Pointer &call) { | |
2194 | debugs(5, 5, "comm_accept: FD " << fd << " AsyncCall: " << call); | |
2195 | assert(isOpen(fd)); | |
9e008dda | 2196 | |
b0469965 | 2197 | fdc_table[fd].subscribe(call); |
2d8c0b1a | 2198 | } |
62e76326 | 2199 | |
9e008dda | 2200 | // Called when somebody wants to be notified when our socket accepts new |
b0469965 | 2201 | // connection. We do not probe the FD until there is such interest. |
2d8c0b1a | 2202 | void |
b0469965 | 2203 | AcceptFD::subscribe(AsyncCall::Pointer &call) { |
2204 | /* make sure we're not pending! */ | |
2205 | assert(!theCallback); | |
2206 | theCallback = call; | |
2207 | ||
2208 | #if OPTIMISTIC_IO | |
2209 | mayAcceptMore = true; // even if we failed to accept last time | |
2210 | #endif | |
2211 | ||
2212 | if (mayAcceptMore) | |
2213 | acceptNext(); | |
2214 | else | |
2215 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
2216 | } | |
2217 | ||
2218 | bool | |
2219 | AcceptFD::acceptOne() { | |
c99de607 | 2220 | // If there is no callback and we accept, we will leak the accepted FD. |
2221 | // When we are running out of FDs, there is often no callback. | |
b0469965 | 2222 | if (!theCallback) { |
2223 | debugs(5, 5, "AcceptFD::acceptOne orphaned: FD " << fd); | |
9e008dda | 2224 | // XXX: can we remove this and similar "just in case" calls and |
c99de607 | 2225 | // either listen always or listen only when there is a callback? |
2226 | if (!AcceptLimiter::Instance().deferring()) | |
2227 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
b0469965 | 2228 | return false; |
c99de607 | 2229 | } |
2230 | ||
bdd8c442 | 2231 | /* |
2232 | * We don't worry about running low on FDs here. Instead, | |
2233 | * httpAccept() will use AcceptLimiter if we reach the limit | |
2234 | * there. | |
2235 | */ | |
62e76326 | 2236 | |
2d8c0b1a | 2237 | /* Accept a new connection */ |
b0469965 | 2238 | ConnectionDetail connDetails; |
2239 | int newfd = comm_old_accept(fd, connDetails); | |
62e76326 | 2240 | |
2d8c0b1a | 2241 | /* Check for errors */ |
bdd8c442 | 2242 | |
2d8c0b1a | 2243 | if (newfd < 0) { |
b0469965 | 2244 | assert(theCallback != NULL); |
2245 | ||
2d8c0b1a | 2246 | if (newfd == COMM_NOMESSAGE) { |
2247 | /* register interest again */ | |
10b06767 | 2248 | debugs(5, 5, HERE << "try later: FD " << fd << |
9e008dda | 2249 | " handler: " << *theCallback); |
2d8c0b1a | 2250 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); |
b0469965 | 2251 | return false; |
62e76326 | 2252 | } |
2253 | ||
b0469965 | 2254 | // A non-recoverable error; notify the caller */ |
2255 | notify(-1, COMM_ERROR, errno, connDetails); | |
2256 | return false; | |
2d8c0b1a | 2257 | } |
62e76326 | 2258 | |
b0469965 | 2259 | assert(theCallback != NULL); |
2260 | debugs(5, 5, "AcceptFD::acceptOne accepted: FD " << fd << | |
9e008dda AJ |
2261 | " newfd: " << newfd << " from: " << connDetails.peer << |
2262 | " handler: " << *theCallback); | |
b0469965 | 2263 | notify(newfd, COMM_OK, 0, connDetails); |
2264 | return true; | |
2d8c0b1a | 2265 | } |
62e76326 | 2266 | |
2d8c0b1a | 2267 | void |
b0469965 | 2268 | AcceptFD::acceptNext() { |
2269 | mayAcceptMore = acceptOne(); | |
2d8c0b1a | 2270 | } |
62e76326 | 2271 | |
b0469965 | 2272 | void |
9e008dda | 2273 | AcceptFD::notify(int newfd, comm_err_t errcode, int xerrno, const ConnectionDetail &connDetails) { |
b0469965 | 2274 | if (theCallback != NULL) { |
2275 | typedef CommAcceptCbParams Params; | |
2276 | Params ¶ms = GetCommParams<Params>(theCallback); | |
2277 | params.fd = fd; | |
2278 | params.nfd = newfd; | |
2279 | params.details = connDetails; | |
2280 | params.flag = errcode; | |
2281 | params.xerrno = xerrno; | |
2282 | ScheduleCallHere(theCallback); | |
2283 | theCallback = NULL; | |
2284 | } | |
c4b7a5a9 | 2285 | } |
2286 | ||
2d8c0b1a | 2287 | /* |
2288 | * This callback is called whenever a filedescriptor is ready | |
2289 | * to dupe itself and fob off an accept()ed connection | |
2290 | */ | |
2291 | static void | |
b0469965 | 2292 | comm_accept_try(int fd, void *) { |
2293 | assert(isOpen(fd)); | |
2294 | fdc_table[fd].acceptNext(); | |
c4b7a5a9 | 2295 | } |
6cce2334 | 2296 | |
a50bfe93 | 2297 | void CommIO::Initialise() { |
6cce2334 | 2298 | /* Initialize done pipe signal */ |
2299 | int DonePipe[2]; | |
9e008dda | 2300 | if (pipe(DonePipe)) {} |
6cce2334 | 2301 | DoneFD = DonePipe[1]; |
2302 | DoneReadFD = DonePipe[0]; | |
d06925a4 | 2303 | fd_open(DoneReadFD, FD_PIPE, "async-io completetion event: main"); |
2304 | fd_open(DoneFD, FD_PIPE, "async-io completetion event: threads"); | |
2305 | commSetNonBlocking(DoneReadFD); | |
2306 | commSetNonBlocking(DoneFD); | |
2307 | commSetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
6cce2334 | 2308 | Initialised = true; |
2309 | } | |
2310 | ||
d06925a4 | 2311 | void CommIO::NotifyIOClose() { |
2312 | /* Close done pipe signal */ | |
2313 | FlushPipe(); | |
2314 | close(DoneFD); | |
2315 | close(DoneReadFD); | |
2316 | fd_close(DoneFD); | |
2317 | fd_close(DoneReadFD); | |
2318 | Initialised = false; | |
2319 | } | |
2320 | ||
6cce2334 | 2321 | bool CommIO::Initialised = false; |
2322 | bool CommIO::DoneSignalled = false; | |
2323 | int CommIO::DoneFD = -1; | |
2324 | int CommIO::DoneReadFD = -1; | |
2325 | ||
2326 | void | |
a50bfe93 | 2327 | CommIO::FlushPipe() { |
6cce2334 | 2328 | char buf[256]; |
56410c89 | 2329 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); |
6cce2334 | 2330 | } |
2331 | ||
2332 | void | |
a50bfe93 | 2333 | CommIO::NULLFDHandler(int fd, void *data) { |
6cce2334 | 2334 | FlushPipe(); |
2335 | commSetSelect(fd, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
2336 | } | |
2337 | ||
2338 | void | |
a50bfe93 | 2339 | CommIO::ResetNotifications() { |
6cce2334 | 2340 | if (DoneSignalled) { |
62e76326 | 2341 | FlushPipe(); |
2342 | DoneSignalled = false; | |
6cce2334 | 2343 | } |
2344 | } | |
a46d2c0e | 2345 | |
2346 | AcceptLimiter AcceptLimiter::Instance_; | |
2347 | ||
a50bfe93 | 2348 | AcceptLimiter &AcceptLimiter::Instance() { |
a46d2c0e | 2349 | return Instance_; |
2350 | } | |
2351 | ||
c99de607 | 2352 | bool |
2353 | AcceptLimiter::deferring() const { | |
2354 | return deferred.size() > 0; | |
2355 | } | |
2356 | ||
a46d2c0e | 2357 | void |
a50bfe93 | 2358 | AcceptLimiter::defer (int fd, Acceptor::AcceptorFunction *aFunc, void *data) { |
bf8fe701 | 2359 | debugs(5, 5, "AcceptLimiter::defer: FD " << fd << " handler: " << (void*)aFunc); |
a46d2c0e | 2360 | Acceptor temp; |
2361 | temp.theFunction = aFunc; | |
2362 | temp.acceptFD = fd; | |
2363 | temp.theData = data; | |
2364 | deferred.push_back(temp); | |
2365 | } | |
2366 | ||
2367 | void | |
a50bfe93 | 2368 | AcceptLimiter::kick() { |
c99de607 | 2369 | if (!deferring()) |
a46d2c0e | 2370 | return; |
2371 | ||
2372 | /* Yes, this means the first on is the last off.... | |
2373 | * If the list container was a little more friendly, we could sensibly us it. | |
2374 | */ | |
2375 | Acceptor temp = deferred.pop_back(); | |
2376 | ||
2377 | comm_accept (temp.acceptFD, temp.theFunction, temp.theData); | |
2378 | } | |
2379 | ||
9e008dda AJ |
2380 | /// Start waiting for a possibly half-closed connection to close |
2381 | // by scheduling a read callback to a monitoring handler that | |
82ec8dfc | 2382 | // will close the connection on read errors. |
a46d2c0e | 2383 | void |
82ec8dfc | 2384 | commStartHalfClosedMonitor(int fd) { |
74257126 | 2385 | debugs(5, 5, HERE << "adding FD " << fd << " to " << *TheHalfClosed); |
82ec8dfc AR |
2386 | assert(isOpen(fd)); |
2387 | assert(!commHasHalfClosedMonitor(fd)); | |
74257126 AR |
2388 | (void)TheHalfClosed->add(fd); // could also assert the result |
2389 | commPlanHalfClosedCheck(); // may schedule check if we added the first FD | |
2390 | } | |
2391 | ||
2392 | static | |
2393 | void | |
9e008dda | 2394 | commPlanHalfClosedCheck() { |
74257126 AR |
2395 | if (!WillCheckHalfClosed && !TheHalfClosed->empty()) { |
2396 | eventAdd("commHalfClosedCheck", &commHalfClosedCheck, NULL, 1.0, 1); | |
2397 | WillCheckHalfClosed = true; | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | /// iterates over all descriptors that may need half-closed tests and | |
2402 | /// calls comm_read for those that do; re-schedules the check if needed | |
2403 | static | |
2404 | void | |
2405 | commHalfClosedCheck(void *) { | |
2406 | debugs(5, 5, HERE << "checking " << *TheHalfClosed); | |
2407 | ||
2408 | typedef DescriptorSet::const_iterator DSCI; | |
2409 | const DSCI end = TheHalfClosed->end(); | |
2410 | for (DSCI i = TheHalfClosed->begin(); i != end; ++i) { | |
2411 | const int fd = *i; | |
2412 | if (!fd_table[fd].halfClosedReader) { // not reading already | |
2413 | AsyncCall::Pointer call = commCbCall(5,4, "commHalfClosedReader", | |
9e008dda | 2414 | CommIoCbPtrFun(&commHalfClosedReader, NULL)); |
74257126 AR |
2415 | comm_read(fd, NULL, 0, call); |
2416 | fd_table[fd].halfClosedReader = call; | |
2417 | } | |
2418 | } | |
f900210a | 2419 | |
74257126 AR |
2420 | WillCheckHalfClosed = false; // as far as we know |
2421 | commPlanHalfClosedCheck(); // may need to check again | |
f900210a | 2422 | } |
2423 | ||
82ec8dfc AR |
2424 | /// checks whether we are waiting for possibly half-closed connection to close |
2425 | // We are monitoring if the read handler for the fd is the monitoring handler. | |
2426 | bool | |
2427 | commHasHalfClosedMonitor(int fd) { | |
74257126 | 2428 | return TheHalfClosed->has(fd); |
a46d2c0e | 2429 | } |
2430 | ||
82ec8dfc AR |
2431 | /// stop waiting for possibly half-closed connection to close |
2432 | static void | |
2433 | commStopHalfClosedMonitor(int const fd) { | |
74257126 AR |
2434 | debugs(5, 5, HERE << "removing FD " << fd << " from " << *TheHalfClosed); |
2435 | ||
2436 | // cancel the read if one was scheduled | |
2437 | AsyncCall::Pointer reader = fd_table[fd].halfClosedReader; | |
2438 | if (reader != NULL) | |
2439 | comm_read_cancel(fd, reader); | |
2440 | fd_table[fd].halfClosedReader = NULL; | |
2441 | ||
2442 | TheHalfClosed->del(fd); | |
a46d2c0e | 2443 | } |
2444 | ||
82ec8dfc AR |
2445 | /// I/O handler for the possibly half-closed connection monitoring code |
2446 | static void | |
2447 | commHalfClosedReader(int fd, char *, size_t size, comm_err_t flag, int, void *) { | |
2448 | // there cannot be more data coming in on half-closed connections | |
9e008dda | 2449 | assert(size == 0); |
74257126 AR |
2450 | assert(commHasHalfClosedMonitor(fd)); // or we would have canceled the read |
2451 | ||
2452 | fd_table[fd].halfClosedReader = NULL; // done reading, for now | |
a46d2c0e | 2453 | |
82ec8dfc AR |
2454 | // nothing to do if fd is being closed |
2455 | if (flag == COMM_ERR_CLOSING) | |
2456 | return; | |
a46d2c0e | 2457 | |
82ec8dfc AR |
2458 | // if read failed, close the connection |
2459 | if (flag != COMM_OK) { | |
2460 | debugs(5, 3, "commHalfClosedReader: closing FD " << fd); | |
2461 | comm_close(fd); | |
2462 | return; | |
2463 | } | |
a46d2c0e | 2464 | |
82ec8dfc | 2465 | // continue waiting for close or error |
74257126 | 2466 | commPlanHalfClosedCheck(); // make sure this fd will be checked again |
a46d2c0e | 2467 | } |
2468 | ||
a46d2c0e | 2469 | |
b0469965 | 2470 | CommRead::CommRead() : fd(-1), buf(NULL), len(0), callback(NULL) {} |
a46d2c0e | 2471 | |
b0469965 | 2472 | CommRead::CommRead(int fd_, char *buf_, int len_, AsyncCall::Pointer &callback_) |
2473 | : fd(fd_), buf(buf_), len(len_), callback(callback_) {} | |
a46d2c0e | 2474 | |
a50bfe93 | 2475 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 2476 | |
a50bfe93 | 2477 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 2478 | |
a50bfe93 | 2479 | DeferredReadManager::~DeferredReadManager() { |
a46d2c0e | 2480 | flushReads(); |
2481 | assert (deferredReads.empty()); | |
2482 | } | |
2483 | ||
97427e90 | 2484 | /* explicit instantiation required for some systems */ |
2485 | ||
63be0a78 | 2486 | /// \cond AUTODOCS-IGNORE |
2236466c | 2487 | template cbdata_type CbDataList<DeferredRead>::CBDATA_CbDataList; |
63be0a78 | 2488 | /// \endcond |
97427e90 | 2489 | |
a46d2c0e | 2490 | void |
a50bfe93 | 2491 | DeferredReadManager::delayRead(DeferredRead const &aRead) { |
bf8fe701 | 2492 | debugs(5, 3, "Adding deferred read on FD " << aRead.theRead.fd); |
2236466c | 2493 | CbDataList<DeferredRead> *temp = deferredReads.push_back(aRead); |
2796c0d7 | 2494 | |
9e008dda | 2495 | // We have to use a global function as a closer and point to temp |
2796c0d7 AR |
2496 | // instead of "this" because DeferredReadManager is not a job and |
2497 | // is not even cbdata protected | |
2498 | AsyncCall::Pointer closer = commCbCall(5,4, | |
9e008dda AJ |
2499 | "DeferredReadManager::CloseHandler", |
2500 | CommCloseCbPtrFun(&CloseHandler, temp)); | |
2796c0d7 AR |
2501 | comm_add_close_handler(aRead.theRead.fd, closer); |
2502 | temp->element.closer = closer; // remeber so that we can cancel | |
a46d2c0e | 2503 | } |
2504 | ||
2505 | void | |
a50bfe93 | 2506 | DeferredReadManager::CloseHandler(int fd, void *thecbdata) { |
a46d2c0e | 2507 | if (!cbdataReferenceValid (thecbdata)) |
2508 | return; | |
2509 | ||
2236466c | 2510 | CbDataList<DeferredRead> *temp = (CbDataList<DeferredRead> *)thecbdata; |
a46d2c0e | 2511 | |
2796c0d7 | 2512 | temp->element.closer = NULL; |
a46d2c0e | 2513 | temp->element.markCancelled(); |
2514 | } | |
2515 | ||
2516 | DeferredRead | |
2236466c | 2517 | DeferredReadManager::popHead(CbDataListContainer<DeferredRead> &deferredReads) { |
a46d2c0e | 2518 | assert (!deferredReads.empty()); |
2519 | ||
2796c0d7 AR |
2520 | DeferredRead &read = deferredReads.head->element; |
2521 | if (!read.cancelled) { | |
2522 | comm_remove_close_handler(read.theRead.fd, read.closer); | |
2523 | read.closer = NULL; | |
2524 | } | |
a46d2c0e | 2525 | |
2526 | DeferredRead result = deferredReads.pop_front(); | |
2527 | ||
2528 | return result; | |
2529 | } | |
2530 | ||
2531 | void | |
a50bfe93 | 2532 | DeferredReadManager::kickReads(int const count) { |
2236466c | 2533 | /* if we had CbDataList::size() we could consolidate this and flushReads */ |
a46d2c0e | 2534 | |
33cea91c | 2535 | if (count < 1) { |
a46d2c0e | 2536 | flushReads(); |
33cea91c | 2537 | return; |
2538 | } | |
a46d2c0e | 2539 | |
2540 | size_t remaining = count; | |
2541 | ||
2542 | while (!deferredReads.empty() && remaining) { | |
2543 | DeferredRead aRead = popHead(deferredReads); | |
2544 | kickARead(aRead); | |
2545 | ||
2546 | if (!aRead.cancelled) | |
2547 | --remaining; | |
2548 | } | |
2549 | } | |
2550 | ||
2551 | void | |
a50bfe93 | 2552 | DeferredReadManager::flushReads() { |
2236466c | 2553 | CbDataListContainer<DeferredRead> reads; |
a46d2c0e | 2554 | reads = deferredReads; |
2236466c | 2555 | deferredReads = CbDataListContainer<DeferredRead>(); |
a46d2c0e | 2556 | |
27b24462 | 2557 | // XXX: For fairness this SHOULD randomize the order |
a46d2c0e | 2558 | while (!reads.empty()) { |
2559 | DeferredRead aRead = popHead(reads); | |
2560 | kickARead(aRead); | |
2561 | } | |
2562 | } | |
2563 | ||
2564 | void | |
a50bfe93 | 2565 | DeferredReadManager::kickARead(DeferredRead const &aRead) { |
a46d2c0e | 2566 | if (aRead.cancelled) |
2567 | return; | |
2568 | ||
af6a12ee AJ |
2569 | if (aRead.theRead.fd>=0 && fd_table[aRead.theRead.fd].closing()) |
2570 | return; | |
ed2c738b | 2571 | |
bf8fe701 | 2572 | debugs(5, 3, "Kicking deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2573 | |
2574 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2575 | } | |
2576 | ||
2577 | void | |
a50bfe93 | 2578 | DeferredRead::markCancelled() { |
a46d2c0e | 2579 | cancelled = true; |
2580 | } | |
2d8c0b1a | 2581 | |
cc192b50 | 2582 | ConnectionDetail::ConnectionDetail() : me(), peer() { |
2d8c0b1a | 2583 | } |
8ff3fa2e | 2584 | |
8ff3fa2e | 2585 | int |
2586 | CommSelectEngine::checkEvents(int timeout) { | |
fa3f745b | 2587 | static time_t last_timeout = 0; |
2588 | ||
2589 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2590 | if (squid_curtime > last_timeout) { | |
2591 | last_timeout = squid_curtime; | |
2592 | checkTimeouts(); | |
2593 | } | |
2594 | ||
8ff3fa2e | 2595 | switch (comm_select(timeout)) { |
2596 | ||
2597 | case COMM_OK: | |
2598 | ||
2599 | case COMM_TIMEOUT: | |
2600 | return 0; | |
2601 | ||
2602 | case COMM_IDLE: | |
2603 | ||
2604 | case COMM_SHUTDOWN: | |
2605 | return EVENT_IDLE; | |
2606 | ||
2607 | case COMM_ERROR: | |
2608 | return EVENT_ERROR; | |
2609 | ||
2610 | default: | |
2611 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2612 | return EVENT_ERROR; | |
2613 | }; | |
2614 | } |