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30a4f2a8 | 1 | /* |
b510f3a1 | 2 | * DEBUG: section 05 Socket Functions |
30a4f2a8 | 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" |
cfd66529 | 36 | #include "base/AsyncCall.h" |
c4b7a5a9 | 37 | #include "StoreIOBuffer.h" |
38 | #include "comm.h" | |
a553a5a3 | 39 | #include "event.h" |
528b2c61 | 40 | #include "fde.h" |
04f55905 AJ |
41 | #include "comm/AcceptLimiter.h" |
42 | #include "comm/comm_internal.h" | |
cfd66529 | 43 | #include "comm/Connection.h" |
56410c89 | 44 | #include "CommIO.h" |
a553a5a3 | 45 | #include "CommRead.h" |
0eb49b6d | 46 | #include "MemBuf.h" |
781ce8ff | 47 | #include "pconn.h" |
985c86bc | 48 | #include "SquidTime.h" |
b0469965 | 49 | #include "CommCalls.h" |
74257126 | 50 | #include "DescriptorSet.h" |
9b5c4a9a | 51 | #include "icmp/net_db.h" |
96d89ea0 HN |
52 | #include "ip/Address.h" |
53 | #include "ip/Intercept.h" | |
055421ee | 54 | #include "ip/tools.h" |
090089c4 | 55 | |
b671cc68 | 56 | #if defined(_SQUID_CYGWIN_) |
57 | #include <sys/ioctl.h> | |
58 | #endif | |
30a4f2a8 | 59 | #ifdef HAVE_NETINET_TCP_H |
60 | #include <netinet/tcp.h> | |
61 | #endif | |
090089c4 | 62 | |
2b663917 | 63 | /* |
64 | * New C-like simple comm code. This stuff is a mess and doesn't really buy us anything. | |
65 | */ | |
66 | ||
67 | typedef enum { | |
9e008dda AJ |
68 | IOCB_NONE, |
69 | IOCB_READ, | |
70 | IOCB_WRITE | |
2b663917 | 71 | } iocb_type; |
72 | ||
82ec8dfc AR |
73 | static void commStopHalfClosedMonitor(int fd); |
74 | static IOCB commHalfClosedReader; | |
a67d2b2e AR |
75 | static void comm_init_opened(int new_socket, Ip::Address &addr, unsigned char TOS, const char *note, struct addrinfo *AI); |
76 | static int comm_apply_flags(int new_socket, Ip::Address &addr, int flags, struct addrinfo *AI); | |
82ec8dfc AR |
77 | |
78 | ||
b0469965 | 79 | struct comm_io_callback_t { |
9e008dda AJ |
80 | iocb_type type; |
81 | int fd; | |
82 | AsyncCall::Pointer callback; | |
83 | char *buf; | |
84 | FREE *freefunc; | |
85 | int size; | |
86 | int offset; | |
87 | comm_err_t errcode; | |
88 | int xerrno; | |
89 | ||
90 | bool active() const { return callback != NULL; } | |
2b663917 | 91 | }; |
2b663917 | 92 | |
93 | struct _comm_fd { | |
9e008dda AJ |
94 | int fd; |
95 | comm_io_callback_t readcb; | |
96 | comm_io_callback_t writecb; | |
2b663917 | 97 | }; |
98 | typedef struct _comm_fd comm_fd_t; | |
99 | comm_fd_t *commfd_table; | |
100 | ||
b0469965 | 101 | // TODO: make this a comm_io_callback_t method? |
2b663917 | 102 | bool |
103 | commio_has_callback(int fd, iocb_type type, comm_io_callback_t *ccb) | |
104 | { | |
9e008dda AJ |
105 | assert(ccb->fd == fd); |
106 | assert(ccb->type == type); | |
107 | return ccb->active(); | |
2b663917 | 108 | } |
109 | ||
110 | /* | |
b0469965 | 111 | * Configure comm_io_callback_t for I/O |
2b663917 | 112 | * |
113 | * @param fd filedescriptor | |
114 | * @param ccb comm io callback | |
115 | * @param cb callback | |
116 | * @param cbdata callback data (must be cbdata'ed) | |
117 | * @param buf buffer, if applicable | |
118 | * @param freefunc freefunc, if applicable | |
119 | * @param size buffer size | |
120 | */ | |
b0469965 | 121 | static void |
122 | commio_set_callback(int fd, iocb_type type, comm_io_callback_t *ccb, | |
9e008dda | 123 | AsyncCall::Pointer &cb, char *buf, FREE *freefunc, int size) |
2b663917 | 124 | { |
9e008dda AJ |
125 | assert(!ccb->active()); |
126 | assert(ccb->type == type); | |
127 | assert(cb != NULL); | |
128 | ccb->fd = fd; | |
129 | ccb->callback = cb; | |
130 | ccb->buf = buf; | |
131 | ccb->freefunc = freefunc; | |
132 | ccb->size = size; | |
133 | ccb->offset = 0; | |
2b663917 | 134 | } |
135 | ||
136 | ||
b0469965 | 137 | // Schedule the callback call and clear the callback |
138 | static void | |
139 | commio_finish_callback(int fd, comm_io_callback_t *ccb, comm_err_t code, int xerrno) | |
2b663917 | 140 | { |
b0469965 | 141 | debugs(5, 3, "commio_finish_callback: called for FD " << fd << " (" << |
9e008dda AJ |
142 | code << ", " << xerrno << ")"); |
143 | assert(ccb->active()); | |
144 | assert(ccb->fd == fd); | |
145 | ccb->errcode = code; | |
146 | ccb->xerrno = xerrno; | |
147 | ||
148 | comm_io_callback_t cb = *ccb; | |
149 | ||
150 | /* We've got a copy; blow away the real one */ | |
151 | /* XXX duplicate code from commio_cancel_callback! */ | |
152 | ccb->xerrno = 0; | |
153 | ccb->callback = NULL; // cb has it | |
154 | ||
155 | /* free data */ | |
156 | if (cb.freefunc) { | |
157 | cb.freefunc(cb.buf); | |
158 | cb.buf = NULL; | |
159 | } | |
160 | ||
161 | if (cb.callback != NULL) { | |
b0469965 | 162 | typedef CommIoCbParams Params; |
163 | Params ¶ms = GetCommParams<Params>(cb.callback); | |
164 | params.fd = cb.fd; | |
165 | params.buf = cb.buf; | |
166 | params.size = cb.offset; | |
167 | params.flag = cb.errcode; | |
168 | params.xerrno = cb.xerrno; | |
169 | ScheduleCallHere(cb.callback); | |
9e008dda | 170 | } |
2b663917 | 171 | } |
172 | ||
173 | ||
174 | /* | |
175 | * Cancel the given callback | |
176 | * | |
177 | * Remember that the data is cbdataRef'ed. | |
178 | */ | |
b0469965 | 179 | // TODO: make this a comm_io_callback_t method |
180 | static void | |
2b663917 | 181 | commio_cancel_callback(int fd, comm_io_callback_t *ccb) |
182 | { | |
b0469965 | 183 | debugs(5, 3, "commio_cancel_callback: called for FD " << fd); |
9e008dda AJ |
184 | assert(ccb->fd == fd); |
185 | assert(ccb->active()); | |
2b663917 | 186 | |
9e008dda AJ |
187 | ccb->xerrno = 0; |
188 | ccb->callback = NULL; | |
2b663917 | 189 | } |
190 | ||
191 | /* | |
192 | * Call the given comm callback; assumes the callback is valid. | |
9e008dda | 193 | * |
2b663917 | 194 | * @param ccb io completion callback |
195 | */ | |
196 | void | |
197 | commio_call_callback(comm_io_callback_t *ccb) | |
198 | { | |
2b663917 | 199 | } |
200 | ||
090089c4 | 201 | /* STATIC */ |
62e76326 | 202 | |
74257126 AR |
203 | static DescriptorSet *TheHalfClosed = NULL; /// the set of half-closed FDs |
204 | static bool WillCheckHalfClosed = false; /// true if check is scheduled | |
205 | static EVH commHalfClosedCheck; | |
206 | static void commPlanHalfClosedCheck(); | |
207 | ||
cc192b50 | 208 | static comm_err_t commBind(int s, struct addrinfo &); |
f5b8bbc4 | 209 | static void commSetReuseAddr(int); |
210 | static void commSetNoLinger(int); | |
30a4f2a8 | 211 | #ifdef TCP_NODELAY |
f5b8bbc4 | 212 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 213 | #endif |
f5b8bbc4 | 214 | static void commSetTcpRcvbuf(int, int); |
03a1ee42 | 215 | static PF commHandleWrite; |
723123a9 | 216 | |
c4b7a5a9 | 217 | typedef enum { |
62e76326 | 218 | COMM_CB_READ = 1, |
e4ae841b | 219 | COMM_CB_DERIVED |
c4b7a5a9 | 220 | } comm_callback_t; |
221 | ||
b001e822 | 222 | static MemAllocator *conn_close_pool = NULL; |
c4b7a5a9 | 223 | fd_debug_t *fdd_table = NULL; |
62e76326 | 224 | |
04f55905 | 225 | bool |
b0469965 | 226 | isOpen(const int fd) |
b300c36d | 227 | { |
9e008dda | 228 | return fd_table[fd].flags.open != 0; |
b300c36d | 229 | } |
230 | ||
e1a88700 | 231 | /** |
c4b7a5a9 | 232 | * Attempt a read |
233 | * | |
234 | * If the read attempt succeeds or fails, call the callback. | |
235 | * Else, wait for another IO notification. | |
236 | */ | |
2d8c0b1a | 237 | void |
2b663917 | 238 | commHandleRead(int fd, void *data) |
2d8c0b1a | 239 | { |
2b663917 | 240 | comm_io_callback_t *ccb = (comm_io_callback_t *) data; |
9e008dda | 241 | |
2b663917 | 242 | assert(data == COMMIO_FD_READCB(fd)); |
243 | assert(commio_has_callback(fd, IOCB_READ, ccb)); | |
62e76326 | 244 | /* Attempt a read */ |
245 | statCounter.syscalls.sock.reads++; | |
246 | errno = 0; | |
2d8c0b1a | 247 | int retval; |
2b663917 | 248 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 249 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 250 | |
251 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 252 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
9e008dda AJ |
253 | ccb->offset = 0; |
254 | commio_finish_callback(fd, ccb, COMM_ERROR, errno); | |
62e76326 | 255 | return; |
256 | }; | |
257 | ||
258 | /* See if we read anything */ | |
259 | /* Note - read 0 == socket EOF, which is a valid read */ | |
260 | if (retval >= 0) { | |
261 | fd_bytes(fd, retval, FD_READ); | |
9e008dda AJ |
262 | ccb->offset = retval; |
263 | commio_finish_callback(fd, ccb, COMM_OK, errno); | |
62e76326 | 264 | return; |
265 | } | |
c4b7a5a9 | 266 | |
62e76326 | 267 | /* Nope, register for some more IO */ |
2b663917 | 268 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 269 | } |
270 | ||
e1a88700 | 271 | /** |
c4b7a5a9 | 272 | * Queue a read. handler/handler_data are called when the read |
273 | * completes, on error, or on file descriptor close. | |
274 | */ | |
275 | void | |
276 | comm_read(int fd, char *buf, int size, IOCB *handler, void *handler_data) | |
b0469965 | 277 | { |
278 | AsyncCall::Pointer call = commCbCall(5,4, "SomeCommReadHandler", | |
9e008dda | 279 | CommIoCbPtrFun(handler, handler_data)); |
b0469965 | 280 | comm_read(fd, buf, size, call); |
281 | } | |
282 | ||
283 | void | |
284 | comm_read(int fd, char *buf, int size, AsyncCall::Pointer &callback) | |
c4b7a5a9 | 285 | { |
82ec8dfc | 286 | debugs(5, 5, "comm_read, queueing read for FD " << fd << "; asynCall " << callback); |
c4b7a5a9 | 287 | |
82ec8dfc AR |
288 | /* Make sure we are open and not closing */ |
289 | assert(isOpen(fd)); | |
290 | assert(!fd_table[fd].closing()); | |
291 | comm_io_callback_t *ccb = COMMIO_FD_READCB(fd); | |
292 | ||
293 | // Make sure we are either not reading or just passively monitoring. | |
294 | // Active/passive conflicts are OK and simply cancel passive monitoring. | |
295 | if (ccb->active()) { | |
296 | // if the assertion below fails, we have an active comm_read conflict | |
74257126 | 297 | assert(fd_table[fd].halfClosedReader != NULL); |
82ec8dfc AR |
298 | commStopHalfClosedMonitor(fd); |
299 | assert(!ccb->active()); | |
300 | } | |
528b2c61 | 301 | |
2b663917 | 302 | /* Queue the read */ |
82ec8dfc AR |
303 | commio_set_callback(fd, IOCB_READ, ccb, callback, (char *)buf, NULL, size); |
304 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, ccb, 0); | |
c4b7a5a9 | 305 | } |
306 | ||
e1a88700 | 307 | /** |
c4b7a5a9 | 308 | * Empty the read buffers |
309 | * | |
310 | * This is a magical routine that empties the read buffers. | |
311 | * Under some platforms (Linux) if a buffer has data in it before | |
312 | * you call close(), the socket will hang and take quite a while | |
313 | * to timeout. | |
314 | */ | |
315 | static void | |
316 | comm_empty_os_read_buffers(int fd) | |
317 | { | |
a42d5c25 | 318 | #ifdef _SQUID_LINUX_ |
c4b7a5a9 | 319 | /* prevent those nasty RST packets */ |
320 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 321 | |
cc192b50 | 322 | if (fd_table[fd].flags.nonblocking == 1) { |
323 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) {}; | |
324 | } | |
c4b7a5a9 | 325 | #endif |
326 | } | |
327 | ||
328 | ||
e1a88700 | 329 | /** |
2b663917 | 330 | * Return whether the FD has a pending completed callback. |
c4b7a5a9 | 331 | */ |
332 | int | |
333 | comm_has_pending_read_callback(int fd) | |
334 | { | |
b0469965 | 335 | assert(isOpen(fd)); |
336 | // XXX: We do not know whether there is a read callback scheduled. | |
337 | // This is used for pconn management that should probably be more | |
338 | // tightly integrated into comm to minimize the chance that a | |
339 | // closing pconn socket will be used for a new transaction. | |
545d554b | 340 | return false; |
c4b7a5a9 | 341 | } |
342 | ||
b0469965 | 343 | // Does comm check this fd for read readiness? |
344 | // Note that when comm is not monitoring, there can be a pending callback | |
345 | // call, which may resume comm monitoring once fired. | |
528b2c61 | 346 | bool |
b0469965 | 347 | comm_monitors_read(int fd) |
c4b7a5a9 | 348 | { |
b0469965 | 349 | assert(isOpen(fd)); |
350 | // Being active is usually the same as monitoring because we always | |
351 | // start monitoring the FD when we configure comm_io_callback_t for I/O | |
352 | // and we usually configure comm_io_callback_t for I/O when we starting | |
353 | // monitoring a FD for reading. TODO: replace with commio_has_callback | |
354 | return COMMIO_FD_READCB(fd)->active(); | |
c4b7a5a9 | 355 | } |
356 | ||
e1a88700 | 357 | /** |
c4b7a5a9 | 358 | * Cancel a pending read. Assert that we have the right parameters, |
359 | * and that there are no pending read events! | |
2b663917 | 360 | * |
b0469965 | 361 | * XXX: We do not assert that there are no pending read events and |
362 | * with async calls it becomes even more difficult. | |
363 | * The whole interface should be reworked to do callback->cancel() | |
364 | * instead of searching for places where the callback may be stored and | |
365 | * updating the state of those places. | |
366 | * | |
2b663917 | 367 | * AHC Don't call the comm handlers? |
c4b7a5a9 | 368 | */ |
369 | void | |
370 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
371 | { | |
b0469965 | 372 | if (!isOpen(fd)) { |
373 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
374 | return; | |
9e008dda | 375 | } |
b0469965 | 376 | |
377 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
378 | // TODO: is "active" == "monitors FD"? | |
379 | if (!cb->active()) { | |
380 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
381 | return; | |
9e008dda | 382 | } |
b0469965 | 383 | |
384 | typedef CommCbFunPtrCallT<CommIoCbPtrFun> Call; | |
385 | Call *call = dynamic_cast<Call*>(cb->callback.getRaw()); | |
386 | if (!call) { | |
387 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " lacks callback"); | |
388 | return; | |
9e008dda | 389 | } |
b0469965 | 390 | |
82ec8dfc AR |
391 | call->cancel("old comm_read_cancel"); |
392 | ||
b0469965 | 393 | typedef CommIoCbParams Params; |
394 | const Params ¶ms = GetCommParams<Params>(cb->callback); | |
c4b7a5a9 | 395 | |
c4b7a5a9 | 396 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
b0469965 | 397 | assert(call->dialer.handler == callback); |
398 | assert(params.data == data); | |
c4b7a5a9 | 399 | |
400 | /* Delete the callback */ | |
b0469965 | 401 | commio_cancel_callback(fd, cb); |
420f2ac8 | 402 | |
403 | /* And the IO event */ | |
62e76326 | 404 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 405 | } |
406 | ||
c4b7a5a9 | 407 | void |
b0469965 | 408 | comm_read_cancel(int fd, AsyncCall::Pointer &callback) |
c4b7a5a9 | 409 | { |
b0469965 | 410 | callback->cancel("comm_read_cancel"); |
9e008dda | 411 | |
b0469965 | 412 | if (!isOpen(fd)) { |
413 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
414 | return; | |
415 | } | |
416 | ||
417 | comm_io_callback_t *cb = COMMIO_FD_READCB(fd); | |
418 | ||
419 | if (!cb->active()) { | |
420 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
421 | return; | |
422 | } | |
423 | ||
424 | AsyncCall::Pointer call = cb->callback; | |
82ec8dfc | 425 | assert(call != NULL); // XXX: should never fail (active() checks for callback==NULL) |
9e008dda | 426 | |
b0469965 | 427 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
428 | assert(call == callback); | |
c4b7a5a9 | 429 | |
b0469965 | 430 | /* Delete the callback */ |
431 | commio_cancel_callback(fd, cb); | |
432 | ||
433 | /* And the IO event */ | |
434 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); | |
c4b7a5a9 | 435 | } |
436 | ||
437 | ||
e1a88700 | 438 | /** |
ce767c23 | 439 | * synchronous wrapper around udp socket functions |
440 | */ | |
ce767c23 | 441 | int |
b7ac5457 | 442 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, Ip::Address &from) |
ce767c23 | 443 | { |
62e76326 | 444 | statCounter.syscalls.sock.recvfroms++; |
cc192b50 | 445 | int x = 0; |
446 | struct addrinfo *AI = NULL; | |
447 | ||
448 | debugs(5,8, "comm_udp_recvfrom: FD " << fd << " from " << from); | |
449 | ||
450 | assert( NULL == AI ); | |
451 | ||
452 | from.InitAddrInfo(AI); | |
453 | ||
454 | x = recvfrom(fd, buf, len, flags, AI->ai_addr, &AI->ai_addrlen); | |
455 | ||
456 | from = *AI; | |
457 | ||
458 | from.FreeAddrInfo(AI); | |
459 | ||
460 | return x; | |
ce767c23 | 461 | } |
462 | ||
365f12a9 | 463 | int |
7d21986b | 464 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 465 | { |
b7ac5457 | 466 | Ip::Address nul; |
cc192b50 | 467 | return comm_udp_recvfrom(fd, buf, len, flags, nul); |
365f12a9 | 468 | } |
469 | ||
f71da12c | 470 | ssize_t |
7d21986b | 471 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 472 | { |
62e76326 | 473 | return send(s, buf, len, flags); |
f71da12c | 474 | } |
ce767c23 | 475 | |
476 | ||
545d554b | 477 | bool |
478 | comm_has_incomplete_write(int fd) | |
479 | { | |
b0469965 | 480 | assert(isOpen(fd)); |
481 | return COMMIO_FD_WRITECB(fd)->active(); | |
d4cb310b | 482 | } |
483 | ||
e1a88700 | 484 | /** |
cf3c0ee3 | 485 | * Queue a write. handler/handler_data are called when the write fully |
486 | * completes, on error, or on file descriptor close. | |
487 | */ | |
9864ee44 | 488 | |
090089c4 | 489 | /* Return the local port associated with fd. */ |
b8d8561b | 490 | u_short |
491 | comm_local_port(int fd) | |
090089c4 | 492 | { |
b7ac5457 | 493 | Ip::Address temp; |
cc192b50 | 494 | struct addrinfo *addr = NULL; |
76f87348 | 495 | fde *F = &fd_table[fd]; |
090089c4 | 496 | |
090089c4 | 497 | /* If the fd is closed already, just return */ |
62e76326 | 498 | |
60c0b5a2 | 499 | if (!F->flags.open) { |
bf8fe701 | 500 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 501 | return 0; |
090089c4 | 502 | } |
62e76326 | 503 | |
cc192b50 | 504 | if (F->local_addr.GetPort()) |
505 | return F->local_addr.GetPort(); | |
62e76326 | 506 | |
6084c0b6 AJ |
507 | if (F->sock_family == AF_INET) |
508 | temp.SetIPv4(); | |
6084c0b6 | 509 | |
cc192b50 | 510 | temp.InitAddrInfo(addr); |
62e76326 | 511 | |
cc192b50 | 512 | if (getsockname(fd, addr->ai_addr, &(addr->ai_addrlen)) ) { |
bf8fe701 | 513 | debugs(50, 1, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
cc192b50 | 514 | temp.FreeAddrInfo(addr); |
62e76326 | 515 | return 0; |
090089c4 | 516 | } |
cc192b50 | 517 | temp = *addr; |
518 | ||
519 | temp.FreeAddrInfo(addr); | |
520 | ||
3d031c35 AJ |
521 | if (F->local_addr.IsAnyAddr()) { |
522 | /* save the whole local address, not just the port. */ | |
523 | F->local_addr = temp; | |
524 | } else { | |
525 | F->local_addr.SetPort(temp.GetPort()); | |
526 | } | |
62e76326 | 527 | |
6084c0b6 | 528 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_addr.GetPort() << "(family=" << F->sock_family << ")"); |
cc192b50 | 529 | return F->local_addr.GetPort(); |
090089c4 | 530 | } |
531 | ||
3d7e9d7c | 532 | static comm_err_t |
cc192b50 | 533 | commBind(int s, struct addrinfo &inaddr) |
090089c4 | 534 | { |
83704487 | 535 | statCounter.syscalls.sock.binds++; |
62e76326 | 536 | |
ac760b5e AJ |
537 | if (bind(s, inaddr.ai_addr, inaddr.ai_addrlen) == 0) { |
538 | debugs(50, 6, "commBind: bind socket FD " << s << " to " << fd_table[s].local_addr); | |
62e76326 | 539 | return COMM_OK; |
ac760b5e | 540 | } |
62e76326 | 541 | |
cc192b50 | 542 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << fd_table[s].local_addr << ": " << xstrerror()); |
62e76326 | 543 | |
090089c4 | 544 | return COMM_ERROR; |
545 | } | |
546 | ||
e1a88700 | 547 | /** |
548 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
549 | * is OR of flags specified in comm.h. Defaults TOS | |
550 | */ | |
b8d8561b | 551 | int |
16b204c4 | 552 | comm_open(int sock_type, |
62e76326 | 553 | int proto, |
b7ac5457 | 554 | Ip::Address &addr, |
62e76326 | 555 | int flags, |
556 | const char *note) | |
d6827718 | 557 | { |
cc192b50 | 558 | return comm_openex(sock_type, proto, addr, flags, 0, note); |
d6827718 | 559 | } |
560 | ||
31be869c AJ |
561 | int |
562 | comm_open_listener(int sock_type, | |
04f7fd38 | 563 | int proto, |
b7ac5457 | 564 | Ip::Address &addr, |
04f7fd38 AJ |
565 | int flags, |
566 | const char *note) | |
31be869c AJ |
567 | { |
568 | int sock = -1; | |
569 | ||
ac760b5e AJ |
570 | /* all listener sockets require bind() */ |
571 | flags |= COMM_DOBIND; | |
572 | ||
31be869c AJ |
573 | /* attempt native enabled port. */ |
574 | sock = comm_openex(sock_type, proto, addr, flags, 0, note); | |
575 | ||
31be869c AJ |
576 | return sock; |
577 | } | |
578 | ||
2d8c0b1a | 579 | static bool |
580 | limitError(int const anErrno) | |
581 | { | |
582 | return anErrno == ENFILE || anErrno == EMFILE; | |
583 | } | |
d6827718 | 584 | |
057f5854 | 585 | int |
586 | comm_set_tos(int fd, int tos) | |
587 | { | |
588 | #ifdef IP_TOS | |
9e008dda AJ |
589 | int x = setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)); |
590 | if (x < 0) | |
591 | debugs(50, 1, "comm_set_tos: setsockopt(IP_TOS) on FD " << fd << ": " << xstrerror()); | |
592 | return x; | |
057f5854 | 593 | #else |
9e008dda AJ |
594 | debugs(50, 0, "WARNING: setsockopt(IP_TOS) not supported on this platform"); |
595 | return -1; | |
057f5854 | 596 | #endif |
597 | } | |
598 | ||
cc192b50 | 599 | void |
600 | comm_set_v6only(int fd, int tos) | |
601 | { | |
602 | #ifdef IPV6_V6ONLY | |
603 | if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) < 0) { | |
7e07ced1 | 604 | debugs(50, 1, "comm_open: setsockopt(IPV6_V6ONLY) " << (tos?"ON":"OFF") << " for FD " << fd << ": " << xstrerror()); |
cc192b50 | 605 | } |
606 | #else | |
607 | debugs(50, 0, "WARNING: comm_open: setsockopt(IPV6_V6ONLY) not supported on this platform"); | |
608 | #endif /* sockopt */ | |
609 | } | |
057f5854 | 610 | |
40d6264d AJ |
611 | /** |
612 | * Set the socket IP_TRANSPARENT option for Linux TPROXY v4 support. | |
613 | */ | |
f1e0717c | 614 | void |
e950e673 | 615 | comm_set_transparent(int fd) |
f1e0717c | 616 | { |
2ad20b4f | 617 | #if defined(IP_TRANSPARENT) |
e950e673 | 618 | int tos = 1; |
ef88b51d AJ |
619 | if (setsockopt(fd, SOL_IP, IP_TRANSPARENT, (char *) &tos, sizeof(int)) < 0) { |
620 | debugs(50, DBG_IMPORTANT, "comm_open: setsockopt(IP_TRANSPARENT) on FD " << fd << ": " << xstrerror()); | |
9e008dda | 621 | } else { |
3949d8b7 AJ |
622 | /* mark the socket as having transparent options */ |
623 | fd_table[fd].flags.transparent = 1; | |
624 | } | |
f1e0717c | 625 | #else |
ef88b51d | 626 | debugs(50, DBG_CRITICAL, "WARNING: comm_open: setsockopt(IP_TRANSPARENT) not supported on this platform"); |
f1e0717c AJ |
627 | #endif /* sockopt */ |
628 | } | |
629 | ||
e1a88700 | 630 | /** |
631 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
632 | * is OR of flags specified in defines.h:COMM_* | |
633 | */ | |
d6827718 | 634 | int |
635 | comm_openex(int sock_type, | |
62e76326 | 636 | int proto, |
b7ac5457 | 637 | Ip::Address &addr, |
62e76326 | 638 | int flags, |
639 | unsigned char TOS, | |
640 | const char *note) | |
090089c4 | 641 | { |
642 | int new_socket; | |
cc192b50 | 643 | int tos = 0; |
644 | struct addrinfo *AI = NULL; | |
090089c4 | 645 | |
88bfe092 | 646 | PROF_start(comm_open); |
090089c4 | 647 | /* Create socket for accepting new connections. */ |
83704487 | 648 | statCounter.syscalls.sock.sockets++; |
62e76326 | 649 | |
cc192b50 | 650 | /* Setup the socket addrinfo details for use */ |
651 | addr.GetAddrInfo(AI); | |
652 | AI->ai_socktype = sock_type; | |
653 | AI->ai_protocol = proto; | |
cc192b50 | 654 | |
655 | debugs(50, 3, "comm_openex: Attempt open socket for: " << addr ); | |
656 | ||
0eb08770 | 657 | new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); |
055421ee | 658 | |
0eb08770 HN |
659 | /* under IPv6 there is the possibility IPv6 is present but disabled. */ |
660 | /* try again as IPv4-native if possible */ | |
055421ee | 661 | if ( new_socket < 0 && Ip::EnableIpv6 && addr.IsIPv6() && addr.SetIPv4() ) { |
0eb08770 HN |
662 | /* attempt to open this IPv4-only. */ |
663 | addr.FreeAddrInfo(AI); | |
664 | /* Setup the socket addrinfo details for use */ | |
665 | addr.GetAddrInfo(AI); | |
666 | AI->ai_socktype = sock_type; | |
667 | AI->ai_protocol = proto; | |
668 | debugs(50, 3, "comm_openex: Attempt fallback open socket for: " << addr ); | |
ec505200 | 669 | new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); |
0eb08770 HN |
670 | debugs(50, 2, HERE << "attempt open " << note << " socket on: " << addr); |
671 | } | |
0eb08770 HN |
672 | |
673 | if (new_socket < 0) { | |
62e76326 | 674 | /* Increase the number of reserved fd's if calls to socket() |
675 | * are failing because the open file table is full. This | |
676 | * limits the number of simultaneous clients */ | |
677 | ||
2d8c0b1a | 678 | if (limitError(errno)) { |
dd4e714f | 679 | debugs(50, DBG_IMPORTANT, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 680 | fdAdjustReserved(); |
2d8c0b1a | 681 | } else { |
8ca8bd92 | 682 | debugs(50, DBG_CRITICAL, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 683 | } |
684 | ||
cc192b50 | 685 | addr.FreeAddrInfo(AI); |
686 | ||
62e76326 | 687 | PROF_stop(comm_open); |
688 | return -1; | |
090089c4 | 689 | } |
62e76326 | 690 | |
cc192b50 | 691 | debugs(50, 3, "comm_openex: Opened socket FD " << new_socket << " : family=" << AI->ai_family << ", type=" << AI->ai_socktype << ", protocol=" << AI->ai_protocol ); |
692 | ||
d6827718 | 693 | /* set TOS if needed */ |
cc192b50 | 694 | if (TOS && comm_set_tos(new_socket, TOS) ) { |
62e76326 | 695 | tos = TOS; |
cc192b50 | 696 | } |
62e76326 | 697 | |
055421ee | 698 | if ( Ip::EnableIpv6&IPV6_SPECIAL_SPLITSTACK && addr.IsIPv6() ) |
7e07ced1 | 699 | comm_set_v6only(new_socket, 1); |
62e76326 | 700 | |
cc192b50 | 701 | /* Windows Vista supports Dual-Sockets. BUT defaults them to V6ONLY. Turn it OFF. */ |
9b1f7ee8 | 702 | /* Other OS may have this administratively disabled for general use. Same deal. */ |
055421ee | 703 | if ( Ip::EnableIpv6&IPV6_SPECIAL_V4MAPPING && addr.IsIPv6() ) |
cc192b50 | 704 | comm_set_v6only(new_socket, 0); |
705 | ||
38344a8e AR |
706 | comm_init_opened(new_socket, addr, TOS, note, AI); |
707 | new_socket = comm_apply_flags(new_socket, addr, flags, AI); | |
708 | ||
709 | addr.FreeAddrInfo(AI); | |
710 | ||
711 | PROF_stop(comm_open); | |
712 | ||
713 | return new_socket; | |
714 | } | |
715 | ||
716 | /// update FD tables after a local or remote (IPC) comm_openex(); | |
717 | void | |
718 | comm_init_opened(int new_socket, | |
a67d2b2e | 719 | Ip::Address &addr, |
5667a628 AR |
720 | unsigned char TOS, |
721 | const char *note, | |
722 | struct addrinfo *AI) | |
38344a8e AR |
723 | { |
724 | assert(new_socket >= 0); | |
725 | assert(AI); | |
726 | ||
727 | fde *F = NULL; | |
728 | ||
090089c4 | 729 | /* update fdstat */ |
bf8fe701 | 730 | debugs(5, 5, "comm_open: FD " << new_socket << " is a new socket"); |
62e76326 | 731 | |
b0469965 | 732 | assert(!isOpen(new_socket)); |
5c5783a2 | 733 | fd_open(new_socket, FD_SOCKET, note); |
62e76326 | 734 | |
c4b7a5a9 | 735 | fdd_table[new_socket].close_file = NULL; |
62e76326 | 736 | |
c4b7a5a9 | 737 | fdd_table[new_socket].close_line = 0; |
62e76326 | 738 | |
76f87348 | 739 | F = &fd_table[new_socket]; |
62e76326 | 740 | |
d6827718 | 741 | F->local_addr = addr; |
62e76326 | 742 | |
cc192b50 | 743 | F->tos = TOS; |
744 | ||
745 | F->sock_family = AI->ai_family; | |
38344a8e AR |
746 | } |
747 | ||
748 | /// apply flags after a local comm_open*() call; | |
749 | /// returns new_socket or -1 on error | |
750 | static int | |
751 | comm_apply_flags(int new_socket, | |
a67d2b2e | 752 | Ip::Address &addr, |
5667a628 AR |
753 | int flags, |
754 | struct addrinfo *AI) | |
38344a8e AR |
755 | { |
756 | assert(new_socket >= 0); | |
757 | assert(AI); | |
758 | const int sock_type = AI->ai_socktype; | |
62e76326 | 759 | |
79a15e0a | 760 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 761 | commSetCloseOnExec(new_socket); |
762 | ||
cdc33f35 | 763 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 764 | commSetReuseAddr(new_socket); |
765 | ||
9e008dda | 766 | if (addr.GetPort() > (u_short) 0) { |
a50bfe93 | 767 | #ifdef _SQUID_MSWIN_ |
a50bfe93 | 768 | if (sock_type != SOCK_DGRAM) |
769 | #endif | |
a50bfe93 | 770 | commSetNoLinger(new_socket); |
62e76326 | 771 | |
772 | if (opt_reuseaddr) | |
773 | commSetReuseAddr(new_socket); | |
090089c4 | 774 | } |
62e76326 | 775 | |
a35595cd | 776 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
9e008dda | 777 | if ((flags & COMM_TRANSPARENT)) { |
a35595cd AJ |
778 | comm_set_transparent(new_socket); |
779 | } | |
a35595cd | 780 | |
ac760b5e AJ |
781 | if ( (flags & COMM_DOBIND) || addr.GetPort() > 0 || !addr.IsAnyAddr() ) { |
782 | if ( !(flags & COMM_DOBIND) && addr.IsAnyAddr() ) | |
783 | debugs(5,1,"WARNING: Squid is attempting to bind() port " << addr << " without being a listener."); | |
784 | if ( addr.IsNoAddr() ) | |
785 | debugs(5,0,"CRITICAL: Squid is attempting to bind() port " << addr << "!!"); | |
786 | ||
cc192b50 | 787 | if (commBind(new_socket, *AI) != COMM_OK) { |
62e76326 | 788 | comm_close(new_socket); |
789 | return -1; | |
62e76326 | 790 | } |
23ff6968 | 791 | } |
62e76326 | 792 | |
79a15e0a | 793 | if (flags & COMM_NONBLOCKING) |
9e008dda | 794 | if (commSetNonBlocking(new_socket) == COMM_ERROR) { |
38344a8e | 795 | comm_close(new_socket); |
62e76326 | 796 | return -1; |
62e76326 | 797 | } |
798 | ||
30a4f2a8 | 799 | #ifdef TCP_NODELAY |
800 | if (sock_type == SOCK_STREAM) | |
62e76326 | 801 | commSetTcpNoDelay(new_socket); |
802 | ||
30a4f2a8 | 803 | #endif |
62e76326 | 804 | |
1241e63e | 805 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 806 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
807 | ||
090089c4 | 808 | return new_socket; |
809 | } | |
810 | ||
a4c0f9c6 AR |
811 | void |
812 | comm_import_opened(int fd, | |
a67d2b2e | 813 | Ip::Address &addr, |
5667a628 AR |
814 | int flags, |
815 | const char *note, | |
816 | struct addrinfo *AI) | |
a4c0f9c6 AR |
817 | { |
818 | debugs(5, 2, HERE << " FD " << fd << " at " << addr); | |
819 | assert(fd >= 0); | |
820 | assert(AI); | |
821 | ||
822 | comm_init_opened(fd, addr, 0, note, AI); | |
823 | ||
824 | if (!(flags & COMM_NOCLOEXEC)) | |
825 | fd_table[fd].flags.close_on_exec = 1; | |
826 | ||
827 | if (addr.GetPort() > (u_short) 0) { | |
828 | #ifdef _SQUID_MSWIN_ | |
829 | if (sock_type != SOCK_DGRAM) | |
830 | #endif | |
831 | fd_table[fd].flags.nolinger = 1; | |
832 | } | |
833 | ||
834 | if ((flags & COMM_TRANSPARENT)) | |
835 | fd_table[fd].flags.transparent = 1; | |
836 | ||
837 | if (flags & COMM_NONBLOCKING) | |
838 | fd_table[fd].flags.nonblocking = 1; | |
839 | ||
840 | #ifdef TCP_NODELAY | |
841 | if (AI->ai_socktype == SOCK_STREAM) | |
842 | fd_table[fd].flags.nodelay = 1; | |
843 | #endif | |
844 | ||
845 | /* no fd_table[fd].flags. updates needed for these conditions: | |
846 | * if ((flags & COMM_REUSEADDR)) ... | |
847 | * if ((flags & COMM_DOBIND) ...) ... | |
848 | */ | |
849 | } | |
850 | ||
5ae21d99 | 851 | #if 0 |
b8d8561b | 852 | int |
b0469965 | 853 | commSetTimeout_old(int fd, int timeout, PF * handler, void *data) |
090089c4 | 854 | { |
f3767a6a | 855 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
03eb2f01 | 856 | assert(fd >= 0); |
857 | assert(fd < Squid_MaxFD); | |
2d8c0b1a | 858 | fde *F = &fd_table[fd]; |
60c0b5a2 | 859 | assert(F->flags.open); |
62e76326 | 860 | |
5c5783a2 | 861 | if (timeout < 0) { |
62e76326 | 862 | cbdataReferenceDone(F->timeout_data); |
863 | F->timeout_handler = NULL; | |
864 | F->timeout = 0; | |
5849612f | 865 | } else { |
62e76326 | 866 | if (handler) { |
867 | cbdataReferenceDone(F->timeout_data); | |
868 | F->timeout_handler = handler; | |
869 | F->timeout_data = cbdataReference(data); | |
870 | } | |
871 | ||
872 | F->timeout = squid_curtime + (time_t) timeout; | |
30a4f2a8 | 873 | } |
62e76326 | 874 | |
a3fa14bf | 875 | return F->timeout; |
090089c4 | 876 | } |
5ae21d99 | 877 | #endif |
b0469965 | 878 | |
879 | int | |
880 | commSetTimeout(int fd, int timeout, PF * handler, void *data) | |
881 | { | |
882 | AsyncCall::Pointer call; | |
f3767a6a | 883 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
9e008dda AJ |
884 | if (handler != NULL) |
885 | call=commCbCall(5,4, "SomeTimeoutHandler", CommTimeoutCbPtrFun(handler, data)); | |
b0469965 | 886 | else |
9e008dda | 887 | call = NULL; |
b0469965 | 888 | return commSetTimeout(fd, timeout, call); |
889 | } | |
890 | ||
891 | ||
cfd66529 AJ |
892 | int |
893 | commSetTimeout(int fd, int timeout, AsyncCall::Pointer &callback) | |
b0469965 | 894 | { |
f3767a6a | 895 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); |
b0469965 | 896 | assert(fd >= 0); |
897 | assert(fd < Squid_MaxFD); | |
898 | fde *F = &fd_table[fd]; | |
899 | assert(F->flags.open); | |
900 | ||
901 | if (timeout < 0) { | |
902 | F->timeoutHandler = NULL; | |
903 | F->timeout = 0; | |
904 | } else { | |
905 | if (callback != NULL) { | |
9e008dda AJ |
906 | typedef CommTimeoutCbParams Params; |
907 | Params ¶ms = GetCommParams<Params>(callback); | |
908 | params.fd = fd; | |
b0469965 | 909 | F->timeoutHandler = callback; |
910 | } | |
911 | ||
912 | F->timeout = squid_curtime + (time_t) timeout; | |
913 | } | |
914 | ||
915 | return F->timeout; | |
916 | ||
917 | } | |
090089c4 | 918 | |
b8d8561b | 919 | int |
b7ac5457 | 920 | comm_connect_addr(int sock, const Ip::Address &address) |
090089c4 | 921 | { |
3d7e9d7c | 922 | comm_err_t status = COMM_OK; |
76f87348 | 923 | fde *F = &fd_table[sock]; |
cc192b50 | 924 | int x = 0; |
b5568a61 | 925 | int err = 0; |
9689d97c | 926 | socklen_t errlen; |
feca3b9a | 927 | struct addrinfo *AI = NULL; |
88bfe092 | 928 | PROF_start(comm_connect_addr); |
cc192b50 | 929 | |
930 | assert(address.GetPort() != 0); | |
931 | ||
fa6a39d7 | 932 | debugs(5, 9, HERE << "connecting socket FD " << sock << " to " << address << " (want family: " << F->sock_family << ")"); |
cc192b50 | 933 | |
3d98ff81 | 934 | /* Handle IPv6 over IPv4-only socket case. |
9d92af86 | 935 | * this case must presently be handled here since the GetAddrInfo asserts on bad mappings. |
3d98ff81 | 936 | * NP: because commResetFD is private to ConnStateData we have to return an error and |
9d92af86 AJ |
937 | * trust its handled properly. |
938 | */ | |
9e008dda | 939 | if (F->sock_family == AF_INET && !address.IsIPv4()) { |
3d98ff81 HN |
940 | errno = ENETUNREACH; |
941 | return COMM_ERR_PROTOCOL; | |
942 | } | |
943 | ||
944 | /* Handle IPv4 over IPv6-only socket case. | |
945 | * This case is presently handled here as it's both a known case and it's | |
946 | * uncertain what error will be returned by the IPv6 stack in such case. It's | |
947 | * possible this will also be handled by the errno checks below after connect() | |
948 | * but needs carefull cross-platform verification, and verifying the address | |
949 | * condition here is simple. | |
950 | */ | |
951 | if (!F->local_addr.IsIPv4() && address.IsIPv4()) { | |
952 | errno = ENETUNREACH; | |
9d92af86 AJ |
953 | return COMM_ERR_PROTOCOL; |
954 | } | |
9d92af86 | 955 | |
feca3b9a | 956 | address.GetAddrInfo(AI, F->sock_family); |
cc192b50 | 957 | |
090089c4 | 958 | /* Establish connection. */ |
b5568a61 | 959 | errno = 0; |
62e76326 | 960 | |
9e008dda | 961 | if (!F->flags.called_connect) { |
62e76326 | 962 | F->flags.called_connect = 1; |
963 | statCounter.syscalls.sock.connects++; | |
964 | ||
feca3b9a | 965 | x = connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 966 | |
5a33a66a | 967 | // XXX: ICAP code refuses callbacks during a pending comm_ call |
968 | // Async calls development will fix this. | |
969 | if (x == 0) { | |
970 | x = -1; | |
971 | errno = EINPROGRESS; | |
972 | } | |
973 | ||
9e008dda | 974 | if (x < 0) { |
cc192b50 | 975 | debugs(5,5, "comm_connect_addr: sock=" << sock << ", addrinfo( " << |
9e008dda AJ |
976 | " flags=" << AI->ai_flags << |
977 | ", family=" << AI->ai_family << | |
978 | ", socktype=" << AI->ai_socktype << | |
979 | ", protocol=" << AI->ai_protocol << | |
980 | ", &addr=" << AI->ai_addr << | |
981 | ", addrlen=" << AI->ai_addrlen << | |
982 | " )" ); | |
cc192b50 | 983 | debugs(5, 9, "connect FD " << sock << ": (" << x << ") " << xstrerror()); |
984 | debugs(14,9, "connecting to: " << address ); | |
985 | } | |
9e008dda | 986 | } else { |
140e2c0b | 987 | #if defined(_SQUID_NEWSOS6_) |
62e76326 | 988 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
989 | ||
feca3b9a | 990 | connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 991 | |
992 | if (errno == EINVAL) { | |
993 | errlen = sizeof(err); | |
994 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
995 | ||
996 | if (x >= 0) | |
997 | errno = x; | |
998 | } | |
999 | ||
33ac9442 | 1000 | #else |
62e76326 | 1001 | errlen = sizeof(err); |
1002 | ||
1003 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
1004 | ||
1005 | if (x == 0) | |
1006 | errno = err; | |
1007 | ||
b5568a61 | 1008 | #if defined(_SQUID_SOLARIS_) |
62e76326 | 1009 | /* |
1010 | * Solaris 2.4's socket emulation doesn't allow you | |
1011 | * to determine the error from a failed non-blocking | |
1012 | * connect and just returns EPIPE. Create a fake | |
1013 | * error message for connect. -- fenner@parc.xerox.com | |
1014 | */ | |
1015 | if (x < 0 && errno == EPIPE) | |
1016 | errno = ENOTCONN; | |
1017 | ||
33ac9442 | 1018 | #endif |
30a4f2a8 | 1019 | #endif |
62e76326 | 1020 | |
e5f6c5c2 | 1021 | } |
62e76326 | 1022 | |
9e008dda AJ |
1023 | /* Squid seems to be working fine without this code. With this code, |
1024 | * we leak memory on many connect requests because of EINPROGRESS. | |
1025 | * If you find that this code is needed, please file a bug report. */ | |
82ec8dfc | 1026 | #if 0 |
feca3b9a AJ |
1027 | #ifdef _SQUID_LINUX_ |
1028 | /* 2007-11-27: | |
9e008dda | 1029 | * Linux Debian replaces our allocated AI pointer with garbage when |
feca3b9a AJ |
1030 | * connect() fails. This leads to segmentation faults deallocating |
1031 | * the system-allocated memory when we go to clean up our pointer. | |
1032 | * HACK: is to leak the memory returned since we can't deallocate. | |
1033 | */ | |
9e008dda | 1034 | if (errno != 0) { |
feca3b9a AJ |
1035 | AI = NULL; |
1036 | } | |
82ec8dfc | 1037 | #endif |
feca3b9a AJ |
1038 | #endif |
1039 | ||
1040 | address.FreeAddrInfo(AI); | |
1041 | ||
88bfe092 | 1042 | PROF_stop(comm_connect_addr); |
62e76326 | 1043 | |
b5568a61 | 1044 | if (errno == 0 || errno == EISCONN) |
62e76326 | 1045 | status = COMM_OK; |
b5568a61 | 1046 | else if (ignoreErrno(errno)) |
62e76326 | 1047 | status = COMM_INPROGRESS; |
3d98ff81 HN |
1048 | else if (errno == EAFNOSUPPORT || errno == EINVAL) |
1049 | return COMM_ERR_PROTOCOL; | |
b5568a61 | 1050 | else |
3d98ff81 | 1051 | return COMM_ERROR; |
62e76326 | 1052 | |
cc192b50 | 1053 | address.NtoA(F->ipaddr, MAX_IPSTRLEN); |
62e76326 | 1054 | |
cc192b50 | 1055 | F->remote_port = address.GetPort(); /* remote_port is HS */ |
62e76326 | 1056 | |
9e008dda | 1057 | if (status == COMM_OK) { |
cc192b50 | 1058 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connected to " << address); |
9e008dda | 1059 | } else if (status == COMM_INPROGRESS) { |
bf8fe701 | 1060 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 1061 | } |
62e76326 | 1062 | |
090089c4 | 1063 | return status; |
1064 | } | |
1065 | ||
cb201b7e | 1066 | void |
1067 | commCallCloseHandlers(int fd) | |
1068 | { | |
76f87348 | 1069 | fde *F = &fd_table[fd]; |
bf8fe701 | 1070 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 1071 | |
8000a965 | 1072 | while (F->closeHandler != NULL) { |
b0469965 | 1073 | AsyncCall::Pointer call = F->closeHandler; |
9e008dda AJ |
1074 | F->closeHandler = call->Next(); |
1075 | call->setNext(NULL); | |
1076 | // If call is not canceled schedule it for execution else ignore it | |
1077 | if (!call->canceled()) { | |
1078 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << call); | |
1079 | typedef CommCloseCbParams Params; | |
1080 | Params ¶ms = GetCommParams<Params>(call); | |
1081 | params.fd = fd; | |
1082 | ScheduleCallHere(call); | |
1083 | } | |
cb201b7e | 1084 | } |
1085 | } | |
1086 | ||
5492ad1d | 1087 | #if LINGERING_CLOSE |
1088 | static void | |
1089 | commLingerClose(int fd, void *unused) | |
1090 | { | |
1091 | LOCAL_ARRAY(char, buf, 1024); | |
1092 | int n; | |
1f7c9178 | 1093 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 1094 | |
5492ad1d | 1095 | if (n < 0) |
bf8fe701 | 1096 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1097 | |
5492ad1d | 1098 | comm_close(fd); |
1099 | } | |
1100 | ||
1101 | static void | |
1102 | commLingerTimeout(int fd, void *unused) | |
1103 | { | |
bf8fe701 | 1104 | debugs(5, 3, "commLingerTimeout: FD " << fd); |
5492ad1d | 1105 | comm_close(fd); |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Inspired by apache | |
1110 | */ | |
1111 | void | |
1112 | comm_lingering_close(int fd) | |
1113 | { | |
d4c19b39 | 1114 | #if USE_SSL |
62e76326 | 1115 | |
d4c19b39 | 1116 | if (fd_table[fd].ssl) |
62e76326 | 1117 | ssl_shutdown_method(fd); |
1118 | ||
d4c19b39 | 1119 | #endif |
62e76326 | 1120 | |
5492ad1d | 1121 | if (shutdown(fd, 1) < 0) { |
62e76326 | 1122 | comm_close(fd); |
1123 | return; | |
5492ad1d | 1124 | } |
62e76326 | 1125 | |
5492ad1d | 1126 | fd_note(fd, "lingering close"); |
1127 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
1128 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
1129 | } | |
62e76326 | 1130 | |
5492ad1d | 1131 | #endif |
1132 | ||
5c336a3b | 1133 | /** |
98264874 | 1134 | * enable linger with time of 0 so that when the socket is |
1135 | * closed, TCP generates a RESET | |
1136 | */ | |
1137 | void | |
5c336a3b | 1138 | comm_reset_close(Comm::ConnectionPointer &conn) |
98264874 | 1139 | { |
5c336a3b AJ |
1140 | struct linger L; |
1141 | L.l_onoff = 1; | |
1142 | L.l_linger = 0; | |
62e76326 | 1143 | |
5c336a3b AJ |
1144 | if (setsockopt(conn->fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
1145 | debugs(50, DBG_CRITICAL, "ERROR: Closing FD " << conn->fd << " with TCP RST: " << xstrerror()); | |
1146 | ||
1147 | conn->close(); | |
1148 | } | |
1149 | ||
1150 | // Legacy close function. | |
1151 | void | |
1152 | old_comm_reset_close(int fd) | |
1153 | { | |
98264874 | 1154 | struct linger L; |
1155 | L.l_onoff = 1; | |
1156 | L.l_linger = 0; | |
62e76326 | 1157 | |
98264874 | 1158 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
468fe1b5 | 1159 | debugs(50, DBG_CRITICAL, "ERROR: Closing FD " << fd << " with TCP RST: " << xstrerror()); |
62e76326 | 1160 | |
98264874 | 1161 | comm_close(fd); |
1162 | } | |
1163 | ||
9e008dda | 1164 | void |
10b06767 AJ |
1165 | comm_close_start(int fd, void *data) |
1166 | { | |
10b06767 | 1167 | #if USE_SSL |
86dedcc1 | 1168 | fde *F = &fd_table[fd]; |
10b06767 AJ |
1169 | if (F->ssl) |
1170 | ssl_shutdown_method(fd); | |
1171 | ||
1172 | #endif | |
1173 | ||
1174 | } | |
1175 | ||
9e008dda | 1176 | void |
b0469965 | 1177 | comm_close_complete(int fd, void *data) |
2d8c0b1a | 1178 | { |
b0469965 | 1179 | #if USE_SSL |
1180 | fde *F = &fd_table[fd]; | |
2d8c0b1a | 1181 | |
b0469965 | 1182 | if (F->ssl) { |
1183 | SSL_free(F->ssl); | |
1184 | F->ssl = NULL; | |
1185 | } | |
2d8c0b1a | 1186 | |
b0469965 | 1187 | #endif |
1188 | fd_close(fd); /* update fdstat */ | |
1189 | ||
1190 | close(fd); | |
1191 | ||
b0469965 | 1192 | statCounter.syscalls.sock.closes++; |
1193 | ||
1194 | /* When an fd closes, give accept() a chance, if need be */ | |
04f55905 | 1195 | Comm::AcceptLimiter::Instance().kick(); |
2d8c0b1a | 1196 | } |
c4b7a5a9 | 1197 | |
1198 | /* | |
1199 | * Close the socket fd. | |
1200 | * | |
1201 | * + call write handlers with ERR_CLOSING | |
1202 | * + call read handlers with ERR_CLOSING | |
1203 | * + call closing handlers | |
a46d2c0e | 1204 | * |
9e008dda | 1205 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a |
a46d2c0e | 1206 | * DeferredReadManager. |
c4b7a5a9 | 1207 | */ |
b8d8561b | 1208 | void |
43ae1d95 | 1209 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1210 | { |
82ec8dfc | 1211 | debugs(5, 3, "comm_close: start closing FD " << fd); |
03eb2f01 | 1212 | assert(fd >= 0); |
1213 | assert(fd < Squid_MaxFD); | |
82ec8dfc AR |
1214 | |
1215 | fde *F = &fd_table[fd]; | |
c4b7a5a9 | 1216 | fdd_table[fd].close_file = file; |
1217 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1218 | |
82ec8dfc | 1219 | if (F->closing()) |
62e76326 | 1220 | return; |
1221 | ||
36afac26 | 1222 | /* XXX: is this obsolete behind F->closing() ? */ |
b8869bcf | 1223 | if ( (shutting_down || reconfiguring) && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1224 | return; |
1225 | ||
c4b7a5a9 | 1226 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
b0469965 | 1227 | assert(isOpen(fd)); |
62e76326 | 1228 | |
76f87348 | 1229 | assert(F->type != FD_FILE); |
62e76326 | 1230 | |
88bfe092 | 1231 | PROF_start(comm_close); |
62e76326 | 1232 | |
10b06767 | 1233 | F->flags.close_request = 1; |
62e76326 | 1234 | |
10b06767 | 1235 | AsyncCall::Pointer startCall=commCbCall(5,4, "comm_close_start", |
9e008dda | 1236 | CommCloseCbPtrFun(comm_close_start, NULL)); |
10b06767 AJ |
1237 | typedef CommCloseCbParams Params; |
1238 | Params &startParams = GetCommParams<Params>(startCall); | |
1239 | startParams.fd = fd; | |
1240 | ScheduleCallHere(startCall); | |
62e76326 | 1241 | |
74257126 AR |
1242 | // a half-closed fd may lack a reader, so we stop monitoring explicitly |
1243 | if (commHasHalfClosedMonitor(fd)) | |
1244 | commStopHalfClosedMonitor(fd); | |
fa80a8ef | 1245 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1246 | |
82ec8dfc | 1247 | // notify read/write handlers |
2b663917 | 1248 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { |
b0469965 | 1249 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1250 | } |
1251 | if (commio_has_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd))) { | |
b0469965 | 1252 | commio_finish_callback(fd, COMMIO_FD_READCB(fd), COMM_ERR_CLOSING, errno); |
2b663917 | 1253 | } |
2d8c0b1a | 1254 | |
cb201b7e | 1255 | commCallCloseHandlers(fd); |
62e76326 | 1256 | |
781ce8ff | 1257 | if (F->pconn.uses) |
1258 | F->pconn.pool->count(F->pconn.uses); | |
62e76326 | 1259 | |
a7ad6e4e | 1260 | comm_empty_os_read_buffers(fd); |
9e008dda | 1261 | |
62e76326 | 1262 | |
10b06767 | 1263 | AsyncCall::Pointer completeCall=commCbCall(5,4, "comm_close_complete", |
9e008dda | 1264 | CommCloseCbPtrFun(comm_close_complete, NULL)); |
10b06767 AJ |
1265 | Params &completeParams = GetCommParams<Params>(completeCall); |
1266 | completeParams.fd = fd; | |
9e008dda | 1267 | // must use async call to wait for all callbacks |
82ec8dfc | 1268 | // scheduled before comm_close() to finish |
10b06767 | 1269 | ScheduleCallHere(completeCall); |
62e76326 | 1270 | |
88bfe092 | 1271 | PROF_stop(comm_close); |
090089c4 | 1272 | } |
1273 | ||
090089c4 | 1274 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1275 | int |
5df61230 | 1276 | comm_udp_sendto(int fd, |
b7ac5457 | 1277 | const Ip::Address &to_addr, |
62e76326 | 1278 | const void *buf, |
1279 | int len) | |
090089c4 | 1280 | { |
cc192b50 | 1281 | int x = 0; |
1282 | struct addrinfo *AI = NULL; | |
1283 | ||
88bfe092 | 1284 | PROF_start(comm_udp_sendto); |
83704487 | 1285 | statCounter.syscalls.sock.sendtos++; |
62e76326 | 1286 | |
cc192b50 | 1287 | debugs(50, 3, "comm_udp_sendto: Attempt to send UDP packet to " << to_addr << |
9e008dda | 1288 | " using FD " << fd << " using Port " << comm_local_port(fd) ); |
cc192b50 | 1289 | |
1290 | /* BUG: something in the above macro appears to occasionally be setting AI to garbage. */ | |
1291 | /* AYJ: 2007-08-27 : or was it because I wasn't then setting 'fd_table[fd].sock_family' to fill properly. */ | |
1292 | assert( NULL == AI ); | |
1293 | ||
1294 | to_addr.GetAddrInfo(AI, fd_table[fd].sock_family); | |
1295 | ||
1296 | x = sendto(fd, buf, len, 0, AI->ai_addr, AI->ai_addrlen); | |
1297 | ||
1298 | to_addr.FreeAddrInfo(AI); | |
1299 | ||
88bfe092 | 1300 | PROF_stop(comm_udp_sendto); |
62e76326 | 1301 | |
2d8c0b1a | 1302 | if (x >= 0) |
1303 | return x; | |
1304 | ||
17d51783 | 1305 | #ifdef _SQUID_LINUX_ |
62e76326 | 1306 | |
2d8c0b1a | 1307 | if (ECONNREFUSED != errno) |
17d51783 | 1308 | #endif |
62e76326 | 1309 | |
cc192b50 | 1310 | debugs(50, 1, "comm_udp_sendto: FD " << fd << ", (family=" << fd_table[fd].sock_family << ") " << to_addr << ": " << xstrerror()); |
62e76326 | 1311 | |
2d8c0b1a | 1312 | return COMM_ERROR; |
090089c4 | 1313 | } |
1314 | ||
b8d8561b | 1315 | void |
582b6456 | 1316 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 1317 | { |
bf8fe701 | 1318 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1319 | handler << ", data=" << data); | |
62e76326 | 1320 | |
b0469965 | 1321 | AsyncCall::Pointer call=commCbCall(5,4, "SomeCloseHandler", |
9e008dda | 1322 | CommCloseCbPtrFun(handler, data)); |
b0469965 | 1323 | comm_add_close_handler(fd, call); |
1324 | } | |
62e76326 | 1325 | |
b0469965 | 1326 | void |
1327 | comm_add_close_handler(int fd, AsyncCall::Pointer &call) | |
1328 | { | |
1329 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1330 | |
b0469965 | 1331 | /*TODO:Check for a similar scheduled AsyncCall*/ |
1332 | // for (c = fd_table[fd].closeHandler; c; c = c->next) | |
1333 | // assert(c->handler != handler || c->data != data); | |
62e76326 | 1334 | |
b0469965 | 1335 | call->setNext(fd_table[fd].closeHandler); |
62e76326 | 1336 | |
b0469965 | 1337 | fd_table[fd].closeHandler = call; |
30a4f2a8 | 1338 | } |
1339 | ||
b0469965 | 1340 | |
1341 | // remove function-based close handler | |
b8d8561b | 1342 | void |
582b6456 | 1343 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 1344 | { |
b0469965 | 1345 | assert (isOpen(fd)); |
30a4f2a8 | 1346 | /* Find handler in list */ |
bf8fe701 | 1347 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1348 | handler << ", data=" << data); | |
62e76326 | 1349 | |
b0469965 | 1350 | AsyncCall::Pointer p; |
9e008dda | 1351 | for (p = fd_table[fd].closeHandler; p != NULL; p = p->Next()) { |
b0469965 | 1352 | typedef CommCbFunPtrCallT<CommCloseCbPtrFun> Call; |
1353 | const Call *call = dynamic_cast<const Call*>(p.getRaw()); | |
1354 | if (!call) // method callbacks have their own comm_remove_close_handler | |
1355 | continue; | |
62e76326 | 1356 | |
b0469965 | 1357 | typedef CommCloseCbParams Params; |
1358 | const Params ¶ms = GetCommParams<Params>(p); | |
1359 | if (call->dialer.handler == handler && params.data == data) | |
1360 | break; /* This is our handler */ | |
1361 | } | |
7828df5b CT |
1362 | |
1363 | // comm_close removes all close handlers so our handler may be gone | |
1364 | if (p != NULL) | |
1365 | p->cancel("comm_remove_close_handler"); | |
1366 | // TODO: should we remove the handler from the close handlers list? | |
b0469965 | 1367 | } |
62e76326 | 1368 | |
b0469965 | 1369 | // remove method-based close handler |
1370 | void | |
1371 | comm_remove_close_handler(int fd, AsyncCall::Pointer &call) | |
1372 | { | |
1373 | assert (isOpen(fd)); | |
b0469965 | 1374 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", AsyncCall=" << call); |
62e76326 | 1375 | |
7828df5b CT |
1376 | // comm_close removes all close handlers so our handler may be gone |
1377 | // TODO: should we remove the handler from the close handlers list? | |
1378 | #if 0 | |
b0469965 | 1379 | // Check to see if really exist the given AsyncCall in comm_close handlers |
1380 | // TODO: optimize: this slow code is only needed for the assert() below | |
1381 | AsyncCall::Pointer p; | |
1382 | for (p = fd_table[fd].closeHandler; p != NULL && p != call; p = p->Next()); | |
1383 | assert(p == call); | |
7828df5b | 1384 | #endif |
62e76326 | 1385 | |
b0469965 | 1386 | call->cancel("comm_remove_close_handler"); |
30a4f2a8 | 1387 | } |
090089c4 | 1388 | |
b8d8561b | 1389 | static void |
1390 | commSetNoLinger(int fd) | |
30a4f2a8 | 1391 | { |
62e76326 | 1392 | |
30a4f2a8 | 1393 | struct linger L; |
090089c4 | 1394 | L.l_onoff = 0; /* off */ |
1395 | L.l_linger = 0; | |
62e76326 | 1396 | |
30a4f2a8 | 1397 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1398 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1399 | |
58a6c186 | 1400 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1401 | } |
1402 | ||
b8d8561b | 1403 | static void |
1404 | commSetReuseAddr(int fd) | |
090089c4 | 1405 | { |
1406 | int on = 1; | |
62e76326 | 1407 | |
30a4f2a8 | 1408 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1409 | debugs(50, 1, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1410 | } |
1411 | ||
b8d8561b | 1412 | static void |
1413 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1414 | { |
1415 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
bf8fe701 | 1416 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1417 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)) < 0) |
1418 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1419 | #ifdef TCP_WINDOW_CLAMP | |
1420 | if (setsockopt(fd, SOL_TCP, TCP_WINDOW_CLAMP, (char *) &size, sizeof(size)) < 0) | |
1421 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); | |
1422 | #endif | |
f868539a | 1423 | } |
1424 | ||
b8d8561b | 1425 | int |
1426 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1427 | { |
a50bfe93 | 1428 | #ifndef _SQUID_MSWIN_ |
731e4d49 | 1429 | int flags; |
9e205701 | 1430 | int dummy = 0; |
a50bfe93 | 1431 | #endif |
ec4daaa5 | 1432 | #ifdef _SQUID_WIN32_ |
62e76326 | 1433 | |
b05490a8 | 1434 | int nonblocking = TRUE; |
62e76326 | 1435 | |
629b5f75 | 1436 | #ifdef _SQUID_CYGWIN_ |
1437 | ||
7f6ffd15 | 1438 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1439 | #endif |
1440 | ||
62e76326 | 1441 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1442 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1443 | return COMM_ERROR; |
1444 | } | |
629b5f75 | 1445 | |
1446 | #ifdef _SQUID_CYGWIN_ | |
1447 | ||
7f6ffd15 | 1448 | } else { |
1449 | #endif | |
629b5f75 | 1450 | #endif |
a50bfe93 | 1451 | #ifndef _SQUID_MSWIN_ |
62e76326 | 1452 | |
1453 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1454 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1455 | return COMM_ERROR; |
1456 | } | |
1457 | ||
1458 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1459 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1460 | return COMM_ERROR; |
1461 | } | |
1462 | ||
a50bfe93 | 1463 | #endif |
629b5f75 | 1464 | #ifdef _SQUID_CYGWIN_ |
62e76326 | 1465 | |
090089c4 | 1466 | } |
62e76326 | 1467 | |
7f6ffd15 | 1468 | #endif |
58a6c186 | 1469 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1470 | |
090089c4 | 1471 | return 0; |
1472 | } | |
1473 | ||
7e3ce7b9 | 1474 | int |
1475 | commUnsetNonBlocking(int fd) | |
1476 | { | |
a50bfe93 | 1477 | #ifdef _SQUID_MSWIN_ |
1478 | int nonblocking = FALSE; | |
1479 | ||
1480 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1481 | #else | |
7e3ce7b9 | 1482 | int flags; |
1483 | int dummy = 0; | |
62e76326 | 1484 | |
7e3ce7b9 | 1485 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1486 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1487 | return COMM_ERROR; |
7e3ce7b9 | 1488 | } |
62e76326 | 1489 | |
7e3ce7b9 | 1490 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1491 | #endif |
bf8fe701 | 1492 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1493 | return COMM_ERROR; |
7e3ce7b9 | 1494 | } |
62e76326 | 1495 | |
7e3ce7b9 | 1496 | fd_table[fd].flags.nonblocking = 0; |
1497 | return 0; | |
1498 | } | |
1499 | ||
b8d8561b | 1500 | void |
e1381638 AJ |
1501 | commSetCloseOnExec(int fd) |
1502 | { | |
3ca60c86 | 1503 | #ifdef FD_CLOEXEC |
731e4d49 | 1504 | int flags; |
7a18b487 | 1505 | int dummy = 0; |
62e76326 | 1506 | |
2209fe19 AJ |
1507 | if ((flags = fcntl(fd, F_GETFD, dummy)) < 0) { |
1508 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFD: " << xstrerror()); | |
62e76326 | 1509 | return; |
3ca60c86 | 1510 | } |
62e76326 | 1511 | |
24382924 | 1512 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1513 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1514 | |
d6827718 | 1515 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1516 | |
3ca60c86 | 1517 | #endif |
1518 | } | |
1519 | ||
e90100aa | 1520 | #ifdef TCP_NODELAY |
1521 | static void | |
e1381638 AJ |
1522 | commSetTcpNoDelay(int fd) |
1523 | { | |
e90100aa | 1524 | int on = 1; |
62e76326 | 1525 | |
e90100aa | 1526 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1527 | debugs(50, 1, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1528 | |
d6827718 | 1529 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1530 | } |
62e76326 | 1531 | |
e90100aa | 1532 | #endif |
1533 | ||
b2130d58 | 1534 | void |
e1381638 AJ |
1535 | commSetTcpKeepalive(int fd, int idle, int interval, int timeout) |
1536 | { | |
b2130d58 | 1537 | int on = 1; |
1538 | #ifdef TCP_KEEPCNT | |
1539 | if (timeout && interval) { | |
9e008dda AJ |
1540 | int count = (timeout + interval - 1) / interval; |
1541 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &count, sizeof(on)) < 0) | |
1542 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1543 | } |
1544 | #endif | |
1545 | #ifdef TCP_KEEPIDLE | |
1546 | if (idle) { | |
9e008dda AJ |
1547 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(on)) < 0) |
1548 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1549 | } |
1550 | #endif | |
1551 | #ifdef TCP_KEEPINTVL | |
1552 | if (interval) { | |
9e008dda AJ |
1553 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval, sizeof(on)) < 0) |
1554 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); | |
b2130d58 | 1555 | } |
1556 | #endif | |
1557 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) < 0) | |
9e008dda | 1558 | debugs(5, 1, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1559 | } |
6a988308 | 1560 | |
d86b3703 | 1561 | void |
e1381638 AJ |
1562 | comm_init(void) |
1563 | { | |
c4b7a5a9 | 1564 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1565 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1566 | |
04f55905 AJ |
1567 | /* make sure the accept() socket FIFO delay queue exists */ |
1568 | Comm::AcceptLimiter::Instance(); | |
b0469965 | 1569 | |
1570 | commfd_table = (comm_fd_t *) xcalloc(Squid_MaxFD, sizeof(comm_fd_t)); | |
2b663917 | 1571 | for (int pos = 0; pos < Squid_MaxFD; pos++) { |
9e008dda AJ |
1572 | commfd_table[pos].fd = pos; |
1573 | commfd_table[pos].readcb.fd = pos; | |
1574 | commfd_table[pos].readcb.type = IOCB_READ; | |
1575 | commfd_table[pos].writecb.fd = pos; | |
1576 | commfd_table[pos].writecb.type = IOCB_WRITE; | |
2b663917 | 1577 | } |
2d8c0b1a | 1578 | |
59c4d35b | 1579 | /* XXX account fd_table */ |
090089c4 | 1580 | /* Keep a few file descriptors free so that we don't run out of FD's |
1581 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1582 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
d85c3078 | 1583 | RESERVED_FD = min(100, Squid_MaxFD / 4); |
2d8c0b1a | 1584 | |
04eb0689 | 1585 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
74257126 AR |
1586 | |
1587 | TheHalfClosed = new DescriptorSet; | |
090089c4 | 1588 | } |
1589 | ||
236d1779 | 1590 | void |
e1381638 AJ |
1591 | comm_exit(void) |
1592 | { | |
74257126 AR |
1593 | delete TheHalfClosed; |
1594 | TheHalfClosed = NULL; | |
1595 | ||
236d1779 | 1596 | safe_free(fd_table); |
1597 | safe_free(fdd_table); | |
236d1779 | 1598 | safe_free(commfd_table); |
1599 | } | |
1600 | ||
30a4f2a8 | 1601 | /* Write to FD. */ |
b8d8561b | 1602 | static void |
e1381638 AJ |
1603 | commHandleWrite(int fd, void *data) |
1604 | { | |
2b663917 | 1605 | comm_io_callback_t *state = (comm_io_callback_t *)data; |
30a4f2a8 | 1606 | int len = 0; |
1607 | int nleft; | |
1608 | ||
2b663917 | 1609 | assert(state == COMMIO_FD_WRITECB(fd)); |
1610 | ||
88bfe092 | 1611 | PROF_start(commHandleWrite); |
bf8fe701 | 1612 | debugs(5, 5, "commHandleWrite: FD " << fd << ": off " << |
1613 | (long int) state->offset << ", sz " << (long int) state->size << "."); | |
30a4f2a8 | 1614 | |
1615 | nleft = state->size - state->offset; | |
1f7c9178 | 1616 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
bf8fe701 | 1617 | debugs(5, 5, "commHandleWrite: write() returns " << len); |
b69f7771 | 1618 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 1619 | statCounter.syscalls.sock.writes++; |
307b696e A |
1620 | // After each successful partial write, |
1621 | // reset fde::writeStart to the current time. | |
5ef5e5cc | 1622 | fd_table[fd].writeStart = squid_curtime; |
30a4f2a8 | 1623 | |
1624 | if (len == 0) { | |
62e76326 | 1625 | /* Note we even call write if nleft == 0 */ |
1626 | /* We're done */ | |
1627 | ||
1628 | if (nleft != 0) | |
bf8fe701 | 1629 | debugs(5, 1, "commHandleWrite: FD " << fd << ": write failure: connection closed with " << nleft << " bytes remaining."); |
62e76326 | 1630 | |
b0469965 | 1631 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
30a4f2a8 | 1632 | } else if (len < 0) { |
62e76326 | 1633 | /* An error */ |
1634 | ||
1635 | if (fd_table[fd].flags.socket_eof) { | |
bf8fe701 | 1636 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1637 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1638 | } else if (ignoreErrno(errno)) { |
bf8fe701 | 1639 | debugs(50, 10, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
62e76326 | 1640 | commSetSelect(fd, |
1641 | COMM_SELECT_WRITE, | |
1642 | commHandleWrite, | |
1643 | state, | |
1644 | 0); | |
1645 | } else { | |
bf8fe701 | 1646 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
b0469965 | 1647 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1648 | } |
30a4f2a8 | 1649 | } else { |
62e76326 | 1650 | /* A successful write, continue */ |
1651 | state->offset += len; | |
1652 | ||
57d55dfa | 1653 | if (state->offset < state->size) { |
62e76326 | 1654 | /* Not done, reinstall the write handler and write some more */ |
1655 | commSetSelect(fd, | |
1656 | COMM_SELECT_WRITE, | |
1657 | commHandleWrite, | |
1658 | state, | |
1659 | 0); | |
1660 | } else { | |
b0469965 | 1661 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_OK : COMM_ERROR, errno); |
62e76326 | 1662 | } |
30a4f2a8 | 1663 | } |
62e76326 | 1664 | |
88bfe092 | 1665 | PROF_stop(commHandleWrite); |
30a4f2a8 | 1666 | } |
1667 | ||
7cd8c414 | 1668 | /* |
1669 | * Queue a write. handler/handler_data are called when the write | |
1670 | * completes, on error, or on file descriptor close. | |
1671 | * | |
1672 | * free_func is used to free the passed buffer when the write has completed. | |
1673 | */ | |
b8d8561b | 1674 | void |
e1381638 AJ |
1675 | comm_write(int fd, const char *buf, int size, IOCB * handler, void *handler_data, FREE * free_func) |
1676 | { | |
b0469965 | 1677 | AsyncCall::Pointer call = commCbCall(5,5, "SomeCommWriteHander", |
9e008dda | 1678 | CommIoCbPtrFun(handler, handler_data)); |
b0469965 | 1679 | |
1680 | comm_write(fd, buf, size, call, free_func); | |
1681 | } | |
1682 | ||
1683 | void | |
e1381638 AJ |
1684 | comm_write(int fd, const char *buf, int size, AsyncCall::Pointer &callback, FREE * free_func) |
1685 | { | |
82ec8dfc | 1686 | debugs(5, 5, "comm_write: FD " << fd << ": sz " << size << ": asynCall " << callback); |
62e76326 | 1687 | |
82ec8dfc AR |
1688 | /* Make sure we are open, not closing, and not writing */ |
1689 | assert(isOpen(fd)); | |
1690 | assert(!fd_table[fd].closing()); | |
1691 | comm_io_callback_t *ccb = COMMIO_FD_WRITECB(fd); | |
1692 | assert(!ccb->active()); | |
b0469965 | 1693 | |
5ef5e5cc | 1694 | fd_table[fd].writeStart = squid_curtime; |
82ec8dfc AR |
1695 | /* Queue the write */ |
1696 | commio_set_callback(fd, IOCB_WRITE, ccb, callback, | |
9e008dda | 1697 | (char *)buf, free_func, size); |
82ec8dfc | 1698 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, ccb, 0); |
30a4f2a8 | 1699 | } |
26a880e2 | 1700 | |
b0469965 | 1701 | |
137ee196 | 1702 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 1703 | void |
e1381638 AJ |
1704 | comm_write_mbuf(int fd, MemBuf *mb, IOCB * handler, void *handler_data) |
1705 | { | |
2b663917 | 1706 | comm_write(fd, mb->buf, mb->size, handler, handler_data, mb->freeFunc()); |
cb69b4c7 | 1707 | } |
1708 | ||
b0469965 | 1709 | void |
e1381638 AJ |
1710 | comm_write_mbuf(int fd, MemBuf *mb, AsyncCall::Pointer &callback) |
1711 | { | |
b0469965 | 1712 | comm_write(fd, mb->buf, mb->size, callback, mb->freeFunc()); |
1713 | } | |
1714 | ||
c4b7a5a9 | 1715 | |
89924214 | 1716 | /* |
1717 | * hm, this might be too general-purpose for all the places we'd | |
1718 | * like to use it. | |
1719 | */ | |
b224ea98 | 1720 | int |
e1381638 AJ |
1721 | ignoreErrno(int ierrno) |
1722 | { | |
603500e7 | 1723 | switch (ierrno) { |
62e76326 | 1724 | |
89924214 | 1725 | case EINPROGRESS: |
62e76326 | 1726 | |
603500e7 | 1727 | case EWOULDBLOCK: |
26a880e2 | 1728 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 1729 | |
603500e7 | 1730 | case EAGAIN: |
26a880e2 | 1731 | #endif |
62e76326 | 1732 | |
603500e7 | 1733 | case EALREADY: |
62e76326 | 1734 | |
603500e7 | 1735 | case EINTR: |
db494ab8 | 1736 | #ifdef ERESTART |
62e76326 | 1737 | |
db494ab8 | 1738 | case ERESTART: |
1739 | #endif | |
62e76326 | 1740 | |
1741 | return 1; | |
1742 | ||
603500e7 | 1743 | default: |
62e76326 | 1744 | return 0; |
603500e7 | 1745 | } |
62e76326 | 1746 | |
603500e7 | 1747 | /* NOTREACHED */ |
26a880e2 | 1748 | } |
d723bf6b | 1749 | |
1750 | void | |
e1381638 AJ |
1751 | commCloseAllSockets(void) |
1752 | { | |
d723bf6b | 1753 | int fd; |
1754 | fde *F = NULL; | |
62e76326 | 1755 | |
d723bf6b | 1756 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 1757 | F = &fd_table[fd]; |
1758 | ||
1759 | if (!F->flags.open) | |
1760 | continue; | |
1761 | ||
1762 | if (F->type != FD_SOCKET) | |
1763 | continue; | |
1764 | ||
1765 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
1766 | continue; | |
1767 | ||
b0469965 | 1768 | if (F->timeoutHandler != NULL) { |
1769 | AsyncCall::Pointer callback = F->timeoutHandler; | |
1770 | F->timeoutHandler = NULL; | |
bf8fe701 | 1771 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
9e008dda | 1772 | ScheduleCallHere(callback); |
62e76326 | 1773 | } else { |
468fe1b5 | 1774 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_reset_close()"); |
5c336a3b | 1775 | old_comm_reset_close(fd); |
62e76326 | 1776 | } |
d723bf6b | 1777 | } |
1778 | } | |
1b3db6d9 | 1779 | |
2d8c0b1a | 1780 | static bool |
e1381638 AJ |
1781 | AlreadyTimedOut(fde *F) |
1782 | { | |
2d8c0b1a | 1783 | if (!F->flags.open) |
1784 | return true; | |
1785 | ||
1786 | if (F->timeout == 0) | |
1787 | return true; | |
1788 | ||
1789 | if (F->timeout > squid_curtime) | |
1790 | return true; | |
1791 | ||
1792 | return false; | |
1793 | } | |
1794 | ||
5ef5e5cc AJ |
1795 | static bool |
1796 | writeTimedOut(int fd) | |
1797 | { | |
1798 | if (!commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) | |
1799 | return false; | |
1800 | ||
1801 | if ((squid_curtime - fd_table[fd].writeStart) < Config.Timeout.write) | |
1802 | return false; | |
1803 | ||
1804 | return true; | |
1805 | } | |
1806 | ||
1b3db6d9 | 1807 | void |
e1381638 AJ |
1808 | checkTimeouts(void) |
1809 | { | |
1b3db6d9 | 1810 | int fd; |
1811 | fde *F = NULL; | |
b0469965 | 1812 | AsyncCall::Pointer callback; |
62e76326 | 1813 | |
1b3db6d9 | 1814 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 1815 | F = &fd_table[fd]; |
1816 | ||
5ef5e5cc AJ |
1817 | if (writeTimedOut(fd)) { |
1818 | // We have an active write callback and we are timed out | |
52f6ea9e AR |
1819 | debugs(5, 5, "checkTimeouts: FD " << fd << " auto write timeout"); |
1820 | commSetSelect(fd, COMM_SELECT_WRITE, NULL, NULL, 0); | |
5ef5e5cc | 1821 | commio_finish_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERROR, ETIMEDOUT); |
307b696e | 1822 | } else if (AlreadyTimedOut(F)) |
62e76326 | 1823 | continue; |
1824 | ||
9e008dda | 1825 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 1826 | |
b0469965 | 1827 | if (F->timeoutHandler != NULL) { |
bf8fe701 | 1828 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
b0469965 | 1829 | callback = F->timeoutHandler; |
1830 | F->timeoutHandler = NULL; | |
9e008dda | 1831 | ScheduleCallHere(callback); |
62e76326 | 1832 | } else { |
bf8fe701 | 1833 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 1834 | comm_close(fd); |
1835 | } | |
b5443c04 | 1836 | } |
1837 | } | |
1838 | ||
e1381638 AJ |
1839 | void CommIO::Initialise() |
1840 | { | |
6cce2334 | 1841 | /* Initialize done pipe signal */ |
1842 | int DonePipe[2]; | |
9e008dda | 1843 | if (pipe(DonePipe)) {} |
6cce2334 | 1844 | DoneFD = DonePipe[1]; |
1845 | DoneReadFD = DonePipe[0]; | |
d06925a4 | 1846 | fd_open(DoneReadFD, FD_PIPE, "async-io completetion event: main"); |
1847 | fd_open(DoneFD, FD_PIPE, "async-io completetion event: threads"); | |
1848 | commSetNonBlocking(DoneReadFD); | |
1849 | commSetNonBlocking(DoneFD); | |
1850 | commSetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
6cce2334 | 1851 | Initialised = true; |
1852 | } | |
1853 | ||
e1381638 AJ |
1854 | void CommIO::NotifyIOClose() |
1855 | { | |
d06925a4 | 1856 | /* Close done pipe signal */ |
1857 | FlushPipe(); | |
1858 | close(DoneFD); | |
1859 | close(DoneReadFD); | |
1860 | fd_close(DoneFD); | |
1861 | fd_close(DoneReadFD); | |
1862 | Initialised = false; | |
1863 | } | |
1864 | ||
6cce2334 | 1865 | bool CommIO::Initialised = false; |
1866 | bool CommIO::DoneSignalled = false; | |
1867 | int CommIO::DoneFD = -1; | |
1868 | int CommIO::DoneReadFD = -1; | |
1869 | ||
1870 | void | |
e1381638 AJ |
1871 | CommIO::FlushPipe() |
1872 | { | |
6cce2334 | 1873 | char buf[256]; |
56410c89 | 1874 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); |
6cce2334 | 1875 | } |
1876 | ||
1877 | void | |
e1381638 AJ |
1878 | CommIO::NULLFDHandler(int fd, void *data) |
1879 | { | |
6cce2334 | 1880 | FlushPipe(); |
1881 | commSetSelect(fd, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
1882 | } | |
1883 | ||
1884 | void | |
e1381638 AJ |
1885 | CommIO::ResetNotifications() |
1886 | { | |
6cce2334 | 1887 | if (DoneSignalled) { |
62e76326 | 1888 | FlushPipe(); |
1889 | DoneSignalled = false; | |
6cce2334 | 1890 | } |
1891 | } | |
a46d2c0e | 1892 | |
9e008dda AJ |
1893 | /// Start waiting for a possibly half-closed connection to close |
1894 | // by scheduling a read callback to a monitoring handler that | |
82ec8dfc | 1895 | // will close the connection on read errors. |
a46d2c0e | 1896 | void |
e1381638 AJ |
1897 | commStartHalfClosedMonitor(int fd) |
1898 | { | |
74257126 | 1899 | debugs(5, 5, HERE << "adding FD " << fd << " to " << *TheHalfClosed); |
82ec8dfc AR |
1900 | assert(isOpen(fd)); |
1901 | assert(!commHasHalfClosedMonitor(fd)); | |
74257126 AR |
1902 | (void)TheHalfClosed->add(fd); // could also assert the result |
1903 | commPlanHalfClosedCheck(); // may schedule check if we added the first FD | |
1904 | } | |
1905 | ||
1906 | static | |
1907 | void | |
e1381638 AJ |
1908 | commPlanHalfClosedCheck() |
1909 | { | |
74257126 AR |
1910 | if (!WillCheckHalfClosed && !TheHalfClosed->empty()) { |
1911 | eventAdd("commHalfClosedCheck", &commHalfClosedCheck, NULL, 1.0, 1); | |
1912 | WillCheckHalfClosed = true; | |
1913 | } | |
1914 | } | |
1915 | ||
1916 | /// iterates over all descriptors that may need half-closed tests and | |
1917 | /// calls comm_read for those that do; re-schedules the check if needed | |
1918 | static | |
1919 | void | |
e1381638 AJ |
1920 | commHalfClosedCheck(void *) |
1921 | { | |
74257126 AR |
1922 | debugs(5, 5, HERE << "checking " << *TheHalfClosed); |
1923 | ||
1924 | typedef DescriptorSet::const_iterator DSCI; | |
1925 | const DSCI end = TheHalfClosed->end(); | |
1926 | for (DSCI i = TheHalfClosed->begin(); i != end; ++i) { | |
1927 | const int fd = *i; | |
1928 | if (!fd_table[fd].halfClosedReader) { // not reading already | |
1929 | AsyncCall::Pointer call = commCbCall(5,4, "commHalfClosedReader", | |
9e008dda | 1930 | CommIoCbPtrFun(&commHalfClosedReader, NULL)); |
74257126 AR |
1931 | comm_read(fd, NULL, 0, call); |
1932 | fd_table[fd].halfClosedReader = call; | |
1933 | } | |
1934 | } | |
f900210a | 1935 | |
74257126 AR |
1936 | WillCheckHalfClosed = false; // as far as we know |
1937 | commPlanHalfClosedCheck(); // may need to check again | |
f900210a | 1938 | } |
1939 | ||
82ec8dfc AR |
1940 | /// checks whether we are waiting for possibly half-closed connection to close |
1941 | // We are monitoring if the read handler for the fd is the monitoring handler. | |
1942 | bool | |
e1381638 AJ |
1943 | commHasHalfClosedMonitor(int fd) |
1944 | { | |
74257126 | 1945 | return TheHalfClosed->has(fd); |
a46d2c0e | 1946 | } |
1947 | ||
82ec8dfc AR |
1948 | /// stop waiting for possibly half-closed connection to close |
1949 | static void | |
e1381638 AJ |
1950 | commStopHalfClosedMonitor(int const fd) |
1951 | { | |
74257126 AR |
1952 | debugs(5, 5, HERE << "removing FD " << fd << " from " << *TheHalfClosed); |
1953 | ||
1954 | // cancel the read if one was scheduled | |
1955 | AsyncCall::Pointer reader = fd_table[fd].halfClosedReader; | |
1956 | if (reader != NULL) | |
1957 | comm_read_cancel(fd, reader); | |
1958 | fd_table[fd].halfClosedReader = NULL; | |
1959 | ||
1960 | TheHalfClosed->del(fd); | |
a46d2c0e | 1961 | } |
1962 | ||
82ec8dfc AR |
1963 | /// I/O handler for the possibly half-closed connection monitoring code |
1964 | static void | |
e1381638 AJ |
1965 | commHalfClosedReader(int fd, char *, size_t size, comm_err_t flag, int, void *) |
1966 | { | |
82ec8dfc | 1967 | // there cannot be more data coming in on half-closed connections |
9e008dda | 1968 | assert(size == 0); |
74257126 AR |
1969 | assert(commHasHalfClosedMonitor(fd)); // or we would have canceled the read |
1970 | ||
1971 | fd_table[fd].halfClosedReader = NULL; // done reading, for now | |
a46d2c0e | 1972 | |
82ec8dfc AR |
1973 | // nothing to do if fd is being closed |
1974 | if (flag == COMM_ERR_CLOSING) | |
1975 | return; | |
a46d2c0e | 1976 | |
82ec8dfc AR |
1977 | // if read failed, close the connection |
1978 | if (flag != COMM_OK) { | |
1979 | debugs(5, 3, "commHalfClosedReader: closing FD " << fd); | |
1980 | comm_close(fd); | |
1981 | return; | |
1982 | } | |
a46d2c0e | 1983 | |
82ec8dfc | 1984 | // continue waiting for close or error |
74257126 | 1985 | commPlanHalfClosedCheck(); // make sure this fd will be checked again |
a46d2c0e | 1986 | } |
1987 | ||
a46d2c0e | 1988 | |
b0469965 | 1989 | CommRead::CommRead() : fd(-1), buf(NULL), len(0), callback(NULL) {} |
a46d2c0e | 1990 | |
b0469965 | 1991 | CommRead::CommRead(int fd_, char *buf_, int len_, AsyncCall::Pointer &callback_) |
1992 | : fd(fd_), buf(buf_), len(len_), callback(callback_) {} | |
a46d2c0e | 1993 | |
a50bfe93 | 1994 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 1995 | |
a50bfe93 | 1996 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 1997 | |
e1381638 AJ |
1998 | DeferredReadManager::~DeferredReadManager() |
1999 | { | |
a46d2c0e | 2000 | flushReads(); |
2001 | assert (deferredReads.empty()); | |
2002 | } | |
2003 | ||
97427e90 | 2004 | /* explicit instantiation required for some systems */ |
2005 | ||
63be0a78 | 2006 | /// \cond AUTODOCS-IGNORE |
2236466c | 2007 | template cbdata_type CbDataList<DeferredRead>::CBDATA_CbDataList; |
63be0a78 | 2008 | /// \endcond |
97427e90 | 2009 | |
a46d2c0e | 2010 | void |
e1381638 AJ |
2011 | DeferredReadManager::delayRead(DeferredRead const &aRead) |
2012 | { | |
bf8fe701 | 2013 | debugs(5, 3, "Adding deferred read on FD " << aRead.theRead.fd); |
2236466c | 2014 | CbDataList<DeferredRead> *temp = deferredReads.push_back(aRead); |
2796c0d7 | 2015 | |
9e008dda | 2016 | // We have to use a global function as a closer and point to temp |
2796c0d7 AR |
2017 | // instead of "this" because DeferredReadManager is not a job and |
2018 | // is not even cbdata protected | |
2019 | AsyncCall::Pointer closer = commCbCall(5,4, | |
9e008dda AJ |
2020 | "DeferredReadManager::CloseHandler", |
2021 | CommCloseCbPtrFun(&CloseHandler, temp)); | |
2796c0d7 AR |
2022 | comm_add_close_handler(aRead.theRead.fd, closer); |
2023 | temp->element.closer = closer; // remeber so that we can cancel | |
a46d2c0e | 2024 | } |
2025 | ||
2026 | void | |
e1381638 AJ |
2027 | DeferredReadManager::CloseHandler(int fd, void *thecbdata) |
2028 | { | |
a46d2c0e | 2029 | if (!cbdataReferenceValid (thecbdata)) |
2030 | return; | |
2031 | ||
2236466c | 2032 | CbDataList<DeferredRead> *temp = (CbDataList<DeferredRead> *)thecbdata; |
a46d2c0e | 2033 | |
2796c0d7 | 2034 | temp->element.closer = NULL; |
a46d2c0e | 2035 | temp->element.markCancelled(); |
2036 | } | |
2037 | ||
2038 | DeferredRead | |
e1381638 AJ |
2039 | DeferredReadManager::popHead(CbDataListContainer<DeferredRead> &deferredReads) |
2040 | { | |
a46d2c0e | 2041 | assert (!deferredReads.empty()); |
2042 | ||
2796c0d7 AR |
2043 | DeferredRead &read = deferredReads.head->element; |
2044 | if (!read.cancelled) { | |
2045 | comm_remove_close_handler(read.theRead.fd, read.closer); | |
2046 | read.closer = NULL; | |
2047 | } | |
a46d2c0e | 2048 | |
2049 | DeferredRead result = deferredReads.pop_front(); | |
2050 | ||
2051 | return result; | |
2052 | } | |
2053 | ||
2054 | void | |
e1381638 AJ |
2055 | DeferredReadManager::kickReads(int const count) |
2056 | { | |
2236466c | 2057 | /* if we had CbDataList::size() we could consolidate this and flushReads */ |
a46d2c0e | 2058 | |
33cea91c | 2059 | if (count < 1) { |
a46d2c0e | 2060 | flushReads(); |
33cea91c | 2061 | return; |
2062 | } | |
a46d2c0e | 2063 | |
2064 | size_t remaining = count; | |
2065 | ||
2066 | while (!deferredReads.empty() && remaining) { | |
2067 | DeferredRead aRead = popHead(deferredReads); | |
2068 | kickARead(aRead); | |
2069 | ||
2070 | if (!aRead.cancelled) | |
2071 | --remaining; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | void | |
e1381638 AJ |
2076 | DeferredReadManager::flushReads() |
2077 | { | |
2236466c | 2078 | CbDataListContainer<DeferredRead> reads; |
a46d2c0e | 2079 | reads = deferredReads; |
2236466c | 2080 | deferredReads = CbDataListContainer<DeferredRead>(); |
a46d2c0e | 2081 | |
27b24462 | 2082 | // XXX: For fairness this SHOULD randomize the order |
a46d2c0e | 2083 | while (!reads.empty()) { |
2084 | DeferredRead aRead = popHead(reads); | |
2085 | kickARead(aRead); | |
2086 | } | |
2087 | } | |
2088 | ||
2089 | void | |
e1381638 AJ |
2090 | DeferredReadManager::kickARead(DeferredRead const &aRead) |
2091 | { | |
a46d2c0e | 2092 | if (aRead.cancelled) |
2093 | return; | |
2094 | ||
af6a12ee AJ |
2095 | if (aRead.theRead.fd>=0 && fd_table[aRead.theRead.fd].closing()) |
2096 | return; | |
ed2c738b | 2097 | |
bf8fe701 | 2098 | debugs(5, 3, "Kicking deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2099 | |
2100 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2101 | } | |
2102 | ||
2103 | void | |
e1381638 AJ |
2104 | DeferredRead::markCancelled() |
2105 | { | |
a46d2c0e | 2106 | cancelled = true; |
2107 | } | |
2d8c0b1a | 2108 | |
8ff3fa2e | 2109 | int |
e1381638 AJ |
2110 | CommSelectEngine::checkEvents(int timeout) |
2111 | { | |
fa3f745b | 2112 | static time_t last_timeout = 0; |
2113 | ||
2114 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2115 | if (squid_curtime > last_timeout) { | |
2116 | last_timeout = squid_curtime; | |
2117 | checkTimeouts(); | |
2118 | } | |
2119 | ||
8ff3fa2e | 2120 | switch (comm_select(timeout)) { |
2121 | ||
2122 | case COMM_OK: | |
2123 | ||
2124 | case COMM_TIMEOUT: | |
2125 | return 0; | |
2126 | ||
2127 | case COMM_IDLE: | |
2128 | ||
2129 | case COMM_SHUTDOWN: | |
2130 | return EVENT_IDLE; | |
2131 | ||
2132 | case COMM_ERROR: | |
2133 | return EVENT_ERROR; | |
2134 | ||
2135 | default: | |
2136 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2137 | return EVENT_ERROR; | |
2138 | }; | |
2139 | } | |
10cefb7b | 2140 | |
0ffda73c | 2141 | /// Create a unix-domain socket (UDS) that only supports FD_MSGHDR I/O. |
10cefb7b | 2142 | int |
2143 | comm_open_uds(int sock_type, | |
2144 | int proto, | |
2145 | struct sockaddr_un* addr, | |
2146 | int flags) | |
2147 | { | |
a67d2b2e | 2148 | // TODO: merge with comm_openex() when Ip::Address becomes NetAddress |
ba568924 | 2149 | |
10cefb7b | 2150 | int new_socket; |
10cefb7b | 2151 | |
2152 | PROF_start(comm_open); | |
10cefb7b | 2153 | /* Create socket for accepting new connections. */ |
2154 | statCounter.syscalls.sock.sockets++; | |
2155 | ||
2156 | /* Setup the socket addrinfo details for use */ | |
ba568924 | 2157 | struct addrinfo AI; |
10cefb7b | 2158 | AI.ai_flags = 0; |
2159 | AI.ai_family = PF_UNIX; | |
2160 | AI.ai_socktype = sock_type; | |
2161 | AI.ai_protocol = proto; | |
2162 | AI.ai_addrlen = SUN_LEN(addr); | |
2163 | AI.ai_addr = (sockaddr*)addr; | |
2164 | AI.ai_canonname = NULL; | |
2165 | AI.ai_next = NULL; | |
2166 | ||
ba568924 | 2167 | debugs(50, 3, HERE << "Attempt open socket for: " << addr->sun_path); |
10cefb7b | 2168 | |
2169 | if ((new_socket = socket(AI.ai_family, AI.ai_socktype, AI.ai_protocol)) < 0) { | |
2170 | /* Increase the number of reserved fd's if calls to socket() | |
2171 | * are failing because the open file table is full. This | |
2172 | * limits the number of simultaneous clients */ | |
2173 | ||
2174 | if (limitError(errno)) { | |
ba568924 | 2175 | debugs(50, DBG_IMPORTANT, HERE << "socket failure: " << xstrerror()); |
10cefb7b | 2176 | fdAdjustReserved(); |
2177 | } else { | |
ba568924 | 2178 | debugs(50, DBG_CRITICAL, HERE << "socket failure: " << xstrerror()); |
10cefb7b | 2179 | } |
2180 | ||
2181 | PROF_stop(comm_open); | |
2182 | return -1; | |
2183 | } | |
2184 | ||
ba568924 | 2185 | debugs(50, 3, HERE "Opened UDS FD " << new_socket << " : family=" << AI.ai_family << ", type=" << AI.ai_socktype << ", protocol=" << AI.ai_protocol); |
10cefb7b | 2186 | |
2187 | /* update fdstat */ | |
ba568924 | 2188 | debugs(50, 5, HERE << "FD " << new_socket << " is a new socket"); |
10cefb7b | 2189 | |
2190 | assert(!isOpen(new_socket)); | |
1bac0258 | 2191 | fd_open(new_socket, FD_MSGHDR, NULL); |
10cefb7b | 2192 | |
2193 | fdd_table[new_socket].close_file = NULL; | |
ba568924 | 2194 | |
10cefb7b | 2195 | fdd_table[new_socket].close_line = 0; |
2196 | ||
ba568924 AR |
2197 | fd_table[new_socket].sock_family = AI.ai_family; |
2198 | ||
10cefb7b | 2199 | if (!(flags & COMM_NOCLOEXEC)) |
2200 | commSetCloseOnExec(new_socket); | |
2201 | ||
2202 | if (flags & COMM_REUSEADDR) | |
2203 | commSetReuseAddr(new_socket); | |
2204 | ||
2205 | if (flags & COMM_NONBLOCKING) { | |
2206 | if (commSetNonBlocking(new_socket) != COMM_OK) { | |
2207 | comm_close(new_socket); | |
2208 | PROF_stop(comm_open); | |
2209 | return -1; | |
2210 | } | |
2211 | } | |
2212 | ||
2213 | if (flags & COMM_DOBIND) { | |
2214 | if (commBind(new_socket, AI) != COMM_OK) { | |
2215 | comm_close(new_socket); | |
2216 | PROF_stop(comm_open); | |
2217 | return -1; | |
2218 | } | |
2219 | } | |
2220 | ||
2221 | #ifdef TCP_NODELAY | |
2222 | if (sock_type == SOCK_STREAM) | |
2223 | commSetTcpNoDelay(new_socket); | |
2224 | ||
2225 | #endif | |
2226 | ||
2227 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) | |
2228 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); | |
2229 | ||
2230 | PROF_stop(comm_open); | |
2231 | ||
2232 | return new_socket; | |
2233 | } |