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da2b3a17 | 1 | |
30a4f2a8 | 2 | /* |
4a7a3d56 | 3 | * $Id: comm.cc,v 1.430 2007/04/30 16:56:09 wessels Exp $ |
30a4f2a8 | 4 | * |
5 | * DEBUG: section 5 Socket Functions | |
6 | * AUTHOR: Harvest Derived | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
30a4f2a8 | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
2d8c0b1a | 34 | * |
35 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
30a4f2a8 | 36 | */ |
090089c4 | 37 | |
44a47c6e | 38 | #include "squid.h" |
c4b7a5a9 | 39 | #include "StoreIOBuffer.h" |
40 | #include "comm.h" | |
a553a5a3 | 41 | #include "event.h" |
528b2c61 | 42 | #include "fde.h" |
56410c89 | 43 | #include "CommIO.h" |
a553a5a3 | 44 | #include "CommRead.h" |
ee0989f2 | 45 | #include "ConnectionDetail.h" |
0eb49b6d | 46 | #include "MemBuf.h" |
781ce8ff | 47 | #include "pconn.h" |
985c86bc | 48 | #include "SquidTime.h" |
090089c4 | 49 | |
b671cc68 | 50 | #if defined(_SQUID_CYGWIN_) |
51 | #include <sys/ioctl.h> | |
52 | #endif | |
30a4f2a8 | 53 | #ifdef HAVE_NETINET_TCP_H |
54 | #include <netinet/tcp.h> | |
55 | #endif | |
090089c4 | 56 | |
2b663917 | 57 | /* |
58 | * New C-like simple comm code. This stuff is a mess and doesn't really buy us anything. | |
59 | */ | |
60 | ||
61 | typedef enum { | |
62 | IOCB_NONE, | |
63 | IOCB_READ, | |
64 | IOCB_WRITE | |
65 | } iocb_type; | |
66 | ||
67 | struct _comm_io_callback { | |
68 | iocb_type type; | |
69 | int fd; | |
70 | IOCB *callback; | |
71 | void *callback_data; | |
72 | char *buf; | |
73 | FREE *freefunc; | |
74 | int size; | |
75 | int offset; | |
76 | bool active; | |
77 | bool completed; | |
78 | comm_err_t errcode; | |
79 | int xerrno; | |
80 | dlink_node node; | |
81 | }; | |
82 | typedef struct _comm_io_callback comm_io_callback_t; | |
83 | ||
84 | struct _comm_fd { | |
85 | int fd; | |
86 | comm_io_callback_t readcb; | |
87 | comm_io_callback_t writecb; | |
88 | }; | |
89 | typedef struct _comm_fd comm_fd_t; | |
90 | comm_fd_t *commfd_table; | |
91 | ||
92 | dlink_list commfd_completed_events; | |
93 | ||
94 | bool | |
95 | commio_has_callback(int fd, iocb_type type, comm_io_callback_t *ccb) | |
96 | { | |
97 | assert(ccb->fd == fd); | |
98 | assert(ccb->type == type); | |
99 | return ccb->active == true; | |
100 | } | |
101 | ||
102 | /* | |
103 | * Set the given handler and mark active | |
104 | * | |
105 | * @param fd filedescriptor | |
106 | * @param ccb comm io callback | |
107 | * @param cb callback | |
108 | * @param cbdata callback data (must be cbdata'ed) | |
109 | * @param buf buffer, if applicable | |
110 | * @param freefunc freefunc, if applicable | |
111 | * @param size buffer size | |
112 | */ | |
113 | void | |
114 | commio_set_callback(int fd, iocb_type type, comm_io_callback_t *ccb, IOCB *cb, void *cbdata, char *buf, FREE *freefunc, int size) | |
115 | { | |
116 | assert(ccb->active == false); | |
117 | assert(ccb->type == type); | |
118 | ccb->fd = fd; | |
119 | ccb->callback = cb; | |
b7c66413 | 120 | ccb->callback_data = cbdataReference(cbdata); |
2b663917 | 121 | ccb->buf = buf; |
122 | ccb->freefunc = freefunc; | |
123 | ccb->size = size; | |
124 | ccb->active = true; | |
125 | ccb->completed = false; | |
126 | ccb->offset = 0; | |
127 | } | |
128 | ||
129 | ||
130 | /* | |
131 | * Complete the callback | |
132 | * | |
133 | * Someone may have already called this function once on a non-completed callback. | |
134 | * This happens in the comm_close() routine - the IO may have completed | |
135 | * but comm_close() is called bfeore teh callback has been called. | |
136 | * In this case, leave the details the same (offset, for example) but just update | |
137 | * the error codes. | |
138 | */ | |
139 | void | |
140 | commio_complete_callback(int fd, comm_io_callback_t *ccb, comm_err_t code, int xerrno) | |
141 | { | |
bf8fe701 | 142 | debugs(5, 3, "commio_complete_callback: called for " << fd << " (" << code << ", " << xerrno << ")"); |
2b663917 | 143 | assert(ccb->active == true); |
144 | assert(ccb->fd == fd); | |
145 | ccb->errcode = code; | |
146 | ccb->xerrno = xerrno; | |
147 | if (! ccb->completed) | |
148 | dlinkAddTail(ccb, &ccb->node, &commfd_completed_events); | |
149 | ccb->completed = true; | |
150 | } | |
151 | ||
152 | ||
153 | /* | |
154 | * Cancel the given callback | |
155 | * | |
156 | * Remember that the data is cbdataRef'ed. | |
157 | */ | |
158 | void | |
159 | commio_cancel_callback(int fd, comm_io_callback_t *ccb) | |
160 | { | |
bf8fe701 | 161 | debugs(5, 3, "commio_cancel_callback: called for " << fd); |
2b663917 | 162 | assert(ccb->fd == fd); |
163 | assert(ccb->active == true); | |
164 | ||
165 | if (ccb->completed == true) { | |
166 | dlinkDelete(&ccb->node, &commfd_completed_events); | |
167 | } | |
168 | if (ccb->callback_data) | |
169 | cbdataReferenceDone(ccb->callback_data); | |
170 | ||
171 | ccb->xerrno = 0; | |
172 | ccb->active = false; | |
173 | ccb->completed = false; | |
174 | ccb->callback = NULL; | |
175 | ccb->callback_data = NULL; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Call the given comm callback; assumes the callback is valid. | |
180 | * | |
181 | * @param ccb io completion callback | |
182 | */ | |
183 | void | |
184 | commio_call_callback(comm_io_callback_t *ccb) | |
185 | { | |
186 | comm_io_callback_t cb = *ccb; | |
187 | void *cbdata; | |
188 | assert(cb.active == true); | |
189 | assert(cb.completed == true); | |
bf8fe701 | 190 | debugs(5, 3, "commio_call_callback: called for " << ccb->fd); |
2b663917 | 191 | |
192 | /* We've got a copy; blow away the real one */ | |
193 | /* XXX duplicate code from commio_cancel_callback! */ | |
194 | dlinkDelete(&ccb->node, &commfd_completed_events); | |
195 | ccb->xerrno = 0; | |
196 | ccb->active = false; | |
197 | ccb->completed = false; | |
198 | ccb->callback = NULL; | |
199 | ccb->callback_data = NULL; | |
200 | ||
201 | /* free data */ | |
202 | if (cb.freefunc) { | |
203 | cb.freefunc(cb.buf); | |
204 | cb.buf = NULL; | |
205 | } | |
206 | if (cb.callback && cbdataReferenceValidDone(cb.callback_data, &cbdata)) { | |
207 | /* XXX truely ugly for now! */ | |
208 | cb.callback(cb.fd, cb.buf, cb.offset, cb.errcode, cb.xerrno, cbdata); | |
209 | } | |
210 | } | |
211 | ||
212 | void | |
213 | commio_call_callbacks(void) | |
214 | { | |
215 | comm_io_callback_t *ccb; | |
216 | while (commfd_completed_events.head != NULL) { | |
217 | ccb = (comm_io_callback_t *) commfd_completed_events.head->data; | |
218 | commio_call_callback(ccb); | |
219 | } | |
220 | } | |
221 | ||
f49a8979 | 222 | |
2d8c0b1a | 223 | class ConnectStateData |
62e76326 | 224 | { |
2d8c0b1a | 225 | |
226 | public: | |
d2d59a68 | 227 | void *operator new (size_t); |
228 | void operator delete (void *); | |
2d8c0b1a | 229 | static void Connect (int fd, void *me); |
230 | void connect(); | |
231 | void callCallback(comm_err_t status, int xerrno); | |
232 | void defaults(); | |
f88211e8 | 233 | char *host; |
234 | u_short port; | |
62e76326 | 235 | |
f88211e8 | 236 | struct sockaddr_in S; |
2d8c0b1a | 237 | CallBack<CNCB> callback; |
62e76326 | 238 | |
ddfcbc22 | 239 | struct IN_ADDR in_addr; |
03a1ee42 | 240 | int fd; |
22c653cd | 241 | int tries; |
242 | int addrcount; | |
243 | int connstart; | |
d2d59a68 | 244 | |
245 | private: | |
0b77ecd8 | 246 | int commResetFD(); |
247 | int commRetryConnect(); | |
d2d59a68 | 248 | CBDATA_CLASS(ConnectStateData); |
2d8c0b1a | 249 | }; |
f88211e8 | 250 | |
090089c4 | 251 | /* STATIC */ |
62e76326 | 252 | |
ddfcbc22 | 253 | static comm_err_t commBind(int s, struct IN_ADDR, u_short port); |
f5b8bbc4 | 254 | static void commSetReuseAddr(int); |
255 | static void commSetNoLinger(int); | |
30a4f2a8 | 256 | #ifdef TCP_NODELAY |
f5b8bbc4 | 257 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 258 | #endif |
f5b8bbc4 | 259 | static void commSetTcpRcvbuf(int, int); |
f88211e8 | 260 | static PF commConnectFree; |
03a1ee42 | 261 | static PF commHandleWrite; |
edeb28fd | 262 | static IPH commConnectDnsHandle; |
05589f93 | 263 | static void requireOpenAndActive(int const fd); |
723123a9 | 264 | |
3c1a197f | 265 | static PF comm_accept_try; |
c4b7a5a9 | 266 | |
62e76326 | 267 | class AcceptFD |
268 | { | |
269 | ||
270 | public: | |
bdd8c442 | 271 | AcceptFD() : count(0), finished_(false){} |
2d8c0b1a | 272 | |
273 | void doCallback(int fd, int newfd, comm_err_t errcode, int xerrno, ConnectionDetail *); | |
274 | void nullCallback(); | |
275 | void beginAccepting() {count = 0; finished(false);} | |
276 | ||
277 | size_t acceptCount() const { return count;} | |
278 | ||
279 | bool finishedAccepting() const; | |
2d8c0b1a | 280 | CallBack<IOACB> callback; |
281 | bool finished() const; | |
282 | void finished(bool); | |
283 | ||
284 | private: | |
c4c6da01 | 285 | static size_t const MAX_ACCEPT_PER_LOOP; |
2d8c0b1a | 286 | size_t count; |
287 | bool finished_; | |
288 | }; | |
289 | ||
c4c6da01 | 290 | size_t const AcceptFD::MAX_ACCEPT_PER_LOOP(10); |
291 | ||
a46d2c0e | 292 | class fdc_t |
62e76326 | 293 | { |
a46d2c0e | 294 | |
295 | public: | |
2d8c0b1a | 296 | void acceptOne(int fd); |
297 | void beginAccepting(); | |
298 | int acceptCount() const; | |
2b663917 | 299 | fdc_t() : active(0), fd(-1), half_closed (false){CommCallbackList.head = NULL;CommCallbackList.tail = NULL; } |
62e76326 | 300 | |
2d8c0b1a | 301 | fdc_t(int anFD) : active(0), fd(anFD), half_closed(false) |
62e76326 | 302 | { |
2d8c0b1a | 303 | CommCallbackList.head = NULL; |
304 | CommCallbackList.tail = NULL; | |
62e76326 | 305 | } |
306 | ||
2d8c0b1a | 307 | int active; |
308 | int fd; | |
309 | dlink_list CommCallbackList; | |
62e76326 | 310 | |
545d554b | 311 | template<class P> |
312 | bool findCallback(P predicate); | |
313 | ||
5447bba9 | 314 | class Accept |
62e76326 | 315 | { |
5447bba9 | 316 | |
317 | public: | |
62e76326 | 318 | AcceptFD accept; |
319 | ConnectionDetail connDetails; | |
5447bba9 | 320 | }; |
62e76326 | 321 | |
5447bba9 | 322 | Accept accept; |
62e76326 | 323 | |
a46d2c0e | 324 | bool half_closed; |
c4b7a5a9 | 325 | }; |
62e76326 | 326 | |
c4b7a5a9 | 327 | typedef enum { |
62e76326 | 328 | COMM_CB_READ = 1, |
2d8c0b1a | 329 | COMM_CB_DERIVED, |
c4b7a5a9 | 330 | } comm_callback_t; |
331 | ||
2d8c0b1a | 332 | static int CommCallbackSeqnum = 1; |
333 | ||
334 | class CommCommonCallback | |
62e76326 | 335 | { |
2d8c0b1a | 336 | |
337 | public: | |
338 | CommCommonCallback() : fd (-1), errcode (COMM_OK), xerrno(0), seqnum (CommCallbackSeqnum){} | |
339 | ||
340 | CommCommonCallback(int anFD, comm_err_t errcode, int anErrno) : fd (anFD), errcode (errcode), xerrno(anErrno), seqnum (CommCallbackSeqnum){} | |
341 | ||
62e76326 | 342 | int fd; |
62e76326 | 343 | comm_err_t errcode; |
344 | int xerrno; | |
345 | int seqnum; | |
2d8c0b1a | 346 | }; |
347 | ||
348 | class CommCallbackData | |
349 | { | |
350 | ||
351 | public: | |
b001e822 | 352 | MEMPROXY_CLASS(CommCallbackData); |
2d8c0b1a | 353 | CommCallbackData(CommCommonCallback const &); |
010ffcf0 | 354 | virtual ~CommCallbackData() {} |
355 | ||
2d8c0b1a | 356 | virtual comm_callback_t getType() const { return COMM_CB_DERIVED; } |
357 | ||
358 | void callACallback(); | |
359 | void fdClosing(); | |
360 | virtual void callCallback() = 0; | |
361 | void registerSelf(); | |
362 | void deRegisterSelf(); | |
363 | char *buf; | |
62e76326 | 364 | StoreIOBuffer sb; |
2d8c0b1a | 365 | |
366 | protected: | |
367 | CommCommonCallback result; | |
43ae1d95 | 368 | friend void _comm_close(int fd, char const *file, int line); |
2d8c0b1a | 369 | friend void comm_calliocallback(void); |
370 | ||
371 | private: | |
2d8c0b1a | 372 | dlink_node fd_node; |
373 | dlink_node h_node; | |
c4b7a5a9 | 374 | }; |
62e76326 | 375 | |
b001e822 | 376 | MEMPROXY_CLASS_INLINE(CommCallbackData) |
377 | ||
2d8c0b1a | 378 | class CommAcceptCallbackData : public CommCallbackData |
379 | { | |
380 | ||
381 | public: | |
b001e822 | 382 | MEMPROXY_CLASS(CommAcceptCallbackData); |
2d8c0b1a | 383 | CommAcceptCallbackData(int const anFd, CallBack<IOACB>, comm_err_t, int, int, ConnectionDetail const &); |
384 | virtual void callCallback(); | |
385 | ||
386 | private: | |
2d8c0b1a | 387 | CallBack<IOACB> callback; |
388 | int newfd; | |
389 | ConnectionDetail details; | |
390 | }; | |
391 | ||
b001e822 | 392 | MEMPROXY_CLASS_INLINE(CommAcceptCallbackData) |
393 | ||
2d8c0b1a | 394 | class CommFillCallbackData : public CommCallbackData |
395 | { | |
396 | ||
397 | public: | |
b001e822 | 398 | MEMPROXY_CLASS(CommFillCallbackData); |
2d8c0b1a | 399 | CommFillCallbackData(int const anFd, CallBack<IOFCB> aCallback, comm_err_t, int); |
400 | virtual void callCallback(); | |
401 | ||
402 | private: | |
2d8c0b1a | 403 | CallBack<IOFCB> callback; |
404 | }; | |
405 | ||
b001e822 | 406 | MEMPROXY_CLASS_INLINE(CommFillCallbackData) |
407 | ||
62e76326 | 408 | struct _fd_debug_t |
409 | { | |
43ae1d95 | 410 | char const *close_file; |
62e76326 | 411 | int close_line; |
c4b7a5a9 | 412 | }; |
62e76326 | 413 | |
c4b7a5a9 | 414 | typedef struct _fd_debug_t fd_debug_t; |
415 | ||
b001e822 | 416 | static MemAllocator *conn_close_pool = NULL; |
c4b7a5a9 | 417 | fdc_t *fdc_table = NULL; |
418 | fd_debug_t *fdd_table = NULL; | |
419 | dlink_list CommCallbackList; | |
c4b7a5a9 | 420 | |
421 | ||
422 | /* New and improved stuff */ | |
423 | ||
2d8c0b1a | 424 | CommCallbackData::CommCallbackData(CommCommonCallback const &newResults) : result (newResults) |
425 | { | |
426 | assert(fdc_table[result.fd].active == 1); | |
427 | registerSelf(); | |
428 | } | |
429 | ||
2d8c0b1a | 430 | CommAcceptCallbackData::CommAcceptCallbackData(int const anFd, CallBack<IOACB> aCallback, comm_err_t anErrcode, int anErrno, int aNewFD, ConnectionDetail const &newDetails) :CommCallbackData(CommCommonCallback(anFd, anErrcode, anErrno)), callback (aCallback), newfd(aNewFD), details(newDetails) |
431 | {} | |
432 | ||
2d8c0b1a | 433 | void |
434 | CommCallbackData::registerSelf() | |
435 | { | |
62e76326 | 436 | /* Add it to the end of the list */ |
2d8c0b1a | 437 | dlinkAddTail(this, &h_node, &CommCallbackList); |
c4b7a5a9 | 438 | |
62e76326 | 439 | /* and add it to the end of the fd list */ |
2d8c0b1a | 440 | dlinkAddTail(this, &fd_node, &(fdc_table[result.fd].CommCallbackList)); |
441 | } | |
c4b7a5a9 | 442 | |
2d8c0b1a | 443 | void |
444 | CommCallbackData::deRegisterSelf() | |
445 | { | |
446 | dlinkDelete(&h_node, &CommCallbackList); | |
447 | dlinkDelete(&fd_node, &(fdc_table[result.fd].CommCallbackList)); | |
c4b7a5a9 | 448 | } |
449 | ||
2d8c0b1a | 450 | /* |
451 | * add an IO callback | |
452 | * | |
453 | * IO callbacks are added when we want to notify someone that some IO | |
454 | * has finished but we don't want to risk re-entering a non-reentrant | |
455 | * code block. | |
456 | */ | |
2d8c0b1a | 457 | void |
458 | CommAcceptCallbackData::callCallback() | |
459 | { | |
1d5161bd | 460 | PROF_start(CommAcceptCallbackData_callCallback); |
2d8c0b1a | 461 | callback.handler(result.fd, newfd, &details, result.errcode, result.xerrno, callback.data); |
1d5161bd | 462 | PROF_stop(CommAcceptCallbackData_callCallback); |
2d8c0b1a | 463 | } |
62e76326 | 464 | |
2d8c0b1a | 465 | void |
466 | CommCallbackData::fdClosing() | |
467 | { | |
468 | result.errcode = COMM_ERR_CLOSING; | |
c4b7a5a9 | 469 | } |
470 | ||
2d8c0b1a | 471 | void |
472 | CommCallbackData::callACallback() | |
473 | { | |
474 | assert(fdc_table[result.fd].active == 1); | |
475 | deRegisterSelf(); | |
476 | callCallback(); | |
477 | } | |
c4b7a5a9 | 478 | |
479 | /* | |
480 | * call the IO callbacks | |
481 | * | |
482 | * This should be called before comm_select() so code can attempt to | |
483 | * initiate some IO. | |
484 | * | |
485 | * When io callbacks are added, they are added with the current | |
486 | * sequence number. The sequence number is incremented in this routine - | |
487 | * since callbacks are added to the _tail_ of the list, when we hit a | |
488 | * callback with a seqnum _not_ what it was when we entered this routine, | |
489 | * we can stop. | |
490 | */ | |
491 | void | |
492 | comm_calliocallback(void) | |
493 | { | |
62e76326 | 494 | CommCallbackData *cio; |
010ffcf0 | 495 | int oldseqnum = CommCallbackSeqnum++; |
62e76326 | 496 | |
497 | /* Call our callbacks until we hit NULL or the seqnum changes */ | |
498 | ||
1d5161bd | 499 | /* This will likely rap other counts - again, thats ok (for now) |
500 | * What we should see is the total of the various callback subclasses | |
501 | * equaling this counter. | |
502 | * If they don't, someone has added a class but not profiled it. | |
503 | */ | |
504 | PROF_start(comm_calliocallback); | |
2d8c0b1a | 505 | |
bf8fe701 | 506 | debugs(5, 7, "comm_calliocallback: " << CommCallbackList.head); |
b300c36d | 507 | |
1d5161bd | 508 | while (CommCallbackList.head != NULL && oldseqnum != ((CommCallbackData *)CommCallbackList.head->data)->result.seqnum) { |
509 | dlink_node *node = (dlink_node *)CommCallbackList.head; | |
62e76326 | 510 | cio = (CommCallbackData *)node->data; |
2d8c0b1a | 511 | cio->callACallback(); |
00d77d6b | 512 | delete cio; |
2d8c0b1a | 513 | } |
1d5161bd | 514 | |
515 | PROF_stop(comm_calliocallback); | |
2d8c0b1a | 516 | } |
62e76326 | 517 | |
b300c36d | 518 | bool |
519 | comm_iocallbackpending(void) | |
520 | { | |
bf8fe701 | 521 | debugs(5, 7, "comm_iocallbackpending: " << CommCallbackList.head); |
5a1d3fec | 522 | return (CommCallbackList.head != NULL) || (commfd_completed_events.head != NULL); |
b300c36d | 523 | } |
524 | ||
c4b7a5a9 | 525 | /* |
526 | * Attempt a read | |
527 | * | |
528 | * If the read attempt succeeds or fails, call the callback. | |
529 | * Else, wait for another IO notification. | |
530 | */ | |
2d8c0b1a | 531 | void |
2b663917 | 532 | commHandleRead(int fd, void *data) |
2d8c0b1a | 533 | { |
2b663917 | 534 | comm_io_callback_t *ccb = (comm_io_callback_t *) data; |
535 | ||
536 | assert(data == COMMIO_FD_READCB(fd)); | |
537 | assert(commio_has_callback(fd, IOCB_READ, ccb)); | |
62e76326 | 538 | /* Attempt a read */ |
539 | statCounter.syscalls.sock.reads++; | |
540 | errno = 0; | |
2d8c0b1a | 541 | int retval; |
2b663917 | 542 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 543 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 544 | |
545 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 546 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
2b663917 | 547 | ccb->offset = 0; |
548 | commio_complete_callback(fd, ccb, COMM_ERROR, errno); | |
62e76326 | 549 | return; |
550 | }; | |
551 | ||
552 | /* See if we read anything */ | |
553 | /* Note - read 0 == socket EOF, which is a valid read */ | |
554 | if (retval >= 0) { | |
555 | fd_bytes(fd, retval, FD_READ); | |
2b663917 | 556 | ccb->offset = retval; |
557 | commio_complete_callback(fd, ccb, COMM_OK, errno); | |
62e76326 | 558 | return; |
559 | } | |
c4b7a5a9 | 560 | |
62e76326 | 561 | /* Nope, register for some more IO */ |
2b663917 | 562 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 563 | } |
564 | ||
565 | /* | |
566 | * Queue a read. handler/handler_data are called when the read | |
567 | * completes, on error, or on file descriptor close. | |
568 | */ | |
569 | void | |
570 | comm_read(int fd, char *buf, int size, IOCB *handler, void *handler_data) | |
571 | { | |
62e76326 | 572 | /* Make sure we're not reading anything and we're not closing */ |
573 | assert(fdc_table[fd].active == 1); | |
62e76326 | 574 | assert(!fd_table[fd].flags.closing); |
c4b7a5a9 | 575 | |
bf8fe701 | 576 | debugs(5, 4, "comm_read, queueing read for FD " << fd); |
528b2c61 | 577 | |
2b663917 | 578 | /* Queue the read */ |
579 | /* XXX ugly */ | |
580 | commio_set_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd), handler, handler_data, (char *)buf, NULL, size); | |
581 | commSetSelect(fd, COMM_SELECT_READ, commHandleRead, COMMIO_FD_READCB(fd), 0); | |
c4b7a5a9 | 582 | } |
583 | ||
c4b7a5a9 | 584 | /* |
585 | * Empty the read buffers | |
586 | * | |
587 | * This is a magical routine that empties the read buffers. | |
588 | * Under some platforms (Linux) if a buffer has data in it before | |
589 | * you call close(), the socket will hang and take quite a while | |
590 | * to timeout. | |
591 | */ | |
592 | static void | |
593 | comm_empty_os_read_buffers(int fd) | |
594 | { | |
a42d5c25 | 595 | #ifdef _SQUID_LINUX_ |
c4b7a5a9 | 596 | /* prevent those nasty RST packets */ |
597 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 598 | |
c4b7a5a9 | 599 | if (fd_table[fd].flags.nonblocking == 1) |
62e76326 | 600 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) |
601 | ||
602 | ; | |
c4b7a5a9 | 603 | #endif |
604 | } | |
605 | ||
81679554 | 606 | static void |
05589f93 | 607 | requireOpenAndActive(int const fd) |
608 | { | |
609 | assert(fd_table[fd].flags.open == 1); | |
610 | assert(fdc_table[fd].active == 1); | |
611 | } | |
c4b7a5a9 | 612 | |
613 | /* | |
2b663917 | 614 | * Return whether the FD has a pending completed callback. |
c4b7a5a9 | 615 | */ |
616 | int | |
617 | comm_has_pending_read_callback(int fd) | |
618 | { | |
05589f93 | 619 | requireOpenAndActive(fd); |
2b663917 | 620 | return COMMIO_FD_READCB(fd)->active && COMMIO_FD_READCB(fd)->completed; |
545d554b | 621 | } |
622 | ||
623 | template <class P> | |
624 | bool | |
625 | fdc_t::findCallback(P predicate) | |
626 | { | |
c4b7a5a9 | 627 | /* |
628 | * XXX I don't like having to walk the list! | |
629 | * Instead, if this routine is called often enough, we should | |
630 | * also maintain a linked list of _read_ events - we can just | |
631 | * check if the list head a HEAD.. | |
632 | * - adrian | |
633 | */ | |
545d554b | 634 | dlink_node *node = CommCallbackList.head; |
62e76326 | 635 | |
c4b7a5a9 | 636 | while (node != NULL) { |
545d554b | 637 | if (predicate((CommCallbackData *)node->data)) |
638 | return true; | |
62e76326 | 639 | |
640 | node = node->next; | |
c4b7a5a9 | 641 | } |
642 | ||
643 | /* Not found */ | |
545d554b | 644 | return false; |
c4b7a5a9 | 645 | } |
646 | ||
647 | /* | |
648 | * return whether a file descriptor has a read handler | |
649 | * | |
650 | * Assumptions: the fd is open | |
528b2c61 | 651 | * the fd is a comm fd. |
2b663917 | 652 | * |
653 | * Again - is this "pending read", or "pending completed event", or what? | |
654 | * I'll assume its pending read, not pending completed. | |
655 | * | |
656 | * This makes no sense though - if this is called to check whether there's | |
657 | * a pending read -before- submitting a read then it won't matter whether | |
658 | * its completed or not! Ie: | |
659 | * | |
660 | * + if there's no read and you want to schedule one; fine. | |
661 | * + if a read has completed then the callback block has been deactivated before | |
662 | * the callback is called - if something decides to register for a read | |
663 | * callback once again it should find !active and !completed. | |
664 | * + scheduling a read event when the fd is ! active -and- completed, thats | |
665 | * a bug | |
666 | * + like, afaict, anything else is. | |
c4b7a5a9 | 667 | */ |
528b2c61 | 668 | bool |
c4b7a5a9 | 669 | comm_has_pending_read(int fd) |
670 | { | |
05589f93 | 671 | requireOpenAndActive(fd); |
2b663917 | 672 | return COMMIO_FD_READCB(fd)->active && (! COMMIO_FD_READCB(fd)->completed); |
c4b7a5a9 | 673 | } |
674 | ||
675 | /* | |
676 | * Cancel a pending read. Assert that we have the right parameters, | |
677 | * and that there are no pending read events! | |
2b663917 | 678 | * |
679 | * AHC Don't call the comm handlers? | |
c4b7a5a9 | 680 | */ |
681 | void | |
682 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
683 | { | |
05589f93 | 684 | requireOpenAndActive(fd); |
c4b7a5a9 | 685 | |
c4b7a5a9 | 686 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
2b663917 | 687 | assert(COMMIO_FD_READCB(fd)->callback == callback); |
688 | assert(COMMIO_FD_READCB(fd)->callback_data == data); | |
c4b7a5a9 | 689 | |
690 | /* Delete the callback */ | |
2b663917 | 691 | commio_cancel_callback(fd, COMMIO_FD_READCB(fd)); |
420f2ac8 | 692 | |
693 | /* And the IO event */ | |
62e76326 | 694 | commSetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 695 | } |
696 | ||
697 | ||
d846c273 | 698 | /* |
699 | * Open a filedescriptor, set some sane defaults | |
bdd8c442 | 700 | * XXX DPW 2006-05-30 what is the point of this? |
d846c273 | 701 | */ |
c4b7a5a9 | 702 | void |
43ae1d95 | 703 | fdc_open(int fd, unsigned int type, char const *desc) |
c4b7a5a9 | 704 | { |
62e76326 | 705 | assert(fdc_table[fd].active == 0); |
c4b7a5a9 | 706 | |
62e76326 | 707 | fdc_table[fd].active = 1; |
708 | fdc_table[fd].fd = fd; | |
62e76326 | 709 | fd_open(fd, type, desc); |
c4b7a5a9 | 710 | } |
711 | ||
712 | ||
ce767c23 | 713 | /* |
714 | * synchronous wrapper around udp socket functions | |
715 | */ | |
716 | ||
717 | int | |
7d21986b | 718 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, |
62e76326 | 719 | |
720 | struct sockaddr *from, socklen_t *fromlen) | |
ce767c23 | 721 | { |
62e76326 | 722 | statCounter.syscalls.sock.recvfroms++; |
723 | return recvfrom(fd, buf, len, flags, from, fromlen); | |
ce767c23 | 724 | } |
725 | ||
365f12a9 | 726 | int |
7d21986b | 727 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 728 | { |
62e76326 | 729 | return comm_udp_recvfrom(fd, buf, len, flags, NULL, 0); |
365f12a9 | 730 | } |
731 | ||
f71da12c | 732 | ssize_t |
7d21986b | 733 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 734 | { |
62e76326 | 735 | return send(s, buf, len, flags); |
f71da12c | 736 | } |
ce767c23 | 737 | |
738 | ||
545d554b | 739 | bool |
740 | comm_has_incomplete_write(int fd) | |
741 | { | |
742 | requireOpenAndActive(fd); | |
2b663917 | 743 | return COMMIO_FD_WRITECB(fd)->active; |
d4cb310b | 744 | } |
745 | ||
cf3c0ee3 | 746 | /* |
747 | * Queue a write. handler/handler_data are called when the write fully | |
748 | * completes, on error, or on file descriptor close. | |
749 | */ | |
9864ee44 | 750 | |
090089c4 | 751 | /* Return the local port associated with fd. */ |
b8d8561b | 752 | u_short |
753 | comm_local_port(int fd) | |
090089c4 | 754 | { |
62e76326 | 755 | |
090089c4 | 756 | struct sockaddr_in addr; |
6637e3a5 | 757 | socklen_t addr_len = 0; |
76f87348 | 758 | fde *F = &fd_table[fd]; |
090089c4 | 759 | |
090089c4 | 760 | /* If the fd is closed already, just return */ |
62e76326 | 761 | |
60c0b5a2 | 762 | if (!F->flags.open) { |
bf8fe701 | 763 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 764 | return 0; |
090089c4 | 765 | } |
62e76326 | 766 | |
76f87348 | 767 | if (F->local_port) |
62e76326 | 768 | return F->local_port; |
769 | ||
090089c4 | 770 | addr_len = sizeof(addr); |
62e76326 | 771 | |
090089c4 | 772 | if (getsockname(fd, (struct sockaddr *) &addr, &addr_len)) { |
bf8fe701 | 773 | debugs(50, 1, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
62e76326 | 774 | return 0; |
090089c4 | 775 | } |
62e76326 | 776 | |
76f87348 | 777 | F->local_port = ntohs(addr.sin_port); |
4a7a3d56 | 778 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_port); |
76f87348 | 779 | return F->local_port; |
090089c4 | 780 | } |
781 | ||
3d7e9d7c | 782 | static comm_err_t |
62e76326 | 783 | |
ddfcbc22 | 784 | commBind(int s, struct IN_ADDR in_addr, u_short port) |
090089c4 | 785 | { |
62e76326 | 786 | |
090089c4 | 787 | struct sockaddr_in S; |
090089c4 | 788 | |
090089c4 | 789 | memset(&S, '\0', sizeof(S)); |
790 | S.sin_family = AF_INET; | |
791 | S.sin_port = htons(port); | |
30a4f2a8 | 792 | S.sin_addr = in_addr; |
83704487 | 793 | statCounter.syscalls.sock.binds++; |
62e76326 | 794 | |
090089c4 | 795 | if (bind(s, (struct sockaddr *) &S, sizeof(S)) == 0) |
62e76326 | 796 | return COMM_OK; |
797 | ||
bf8fe701 | 798 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << |
799 | (S.sin_addr.s_addr == INADDR_ANY ? "*" : inet_ntoa(S.sin_addr)) << | |
800 | ":" << (int) port << ": " << xstrerror()); | |
62e76326 | 801 | |
090089c4 | 802 | return COMM_ERROR; |
803 | } | |
804 | ||
805 | /* Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
d6827718 | 806 | * is OR of flags specified in comm.h. Defaults TOS */ |
b8d8561b | 807 | int |
16b204c4 | 808 | comm_open(int sock_type, |
62e76326 | 809 | int proto, |
810 | ||
ddfcbc22 | 811 | struct IN_ADDR addr, |
62e76326 | 812 | u_short port, |
813 | int flags, | |
814 | const char *note) | |
d6827718 | 815 | { |
816 | return comm_openex(sock_type, proto, addr, port, flags, 0, note); | |
817 | } | |
818 | ||
2d8c0b1a | 819 | static bool |
820 | limitError(int const anErrno) | |
821 | { | |
822 | return anErrno == ENFILE || anErrno == EMFILE; | |
823 | } | |
d6827718 | 824 | |
825 | /* Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
826 | * is OR of flags specified in defines.h:COMM_* */ | |
827 | int | |
828 | comm_openex(int sock_type, | |
62e76326 | 829 | int proto, |
830 | ||
ddfcbc22 | 831 | struct IN_ADDR addr, |
62e76326 | 832 | u_short port, |
833 | int flags, | |
834 | unsigned char TOS, | |
835 | const char *note) | |
090089c4 | 836 | { |
837 | int new_socket; | |
9056f553 | 838 | int tos = 0; |
76f87348 | 839 | fde *F = NULL; |
090089c4 | 840 | |
88bfe092 | 841 | PROF_start(comm_open); |
090089c4 | 842 | /* Create socket for accepting new connections. */ |
83704487 | 843 | statCounter.syscalls.sock.sockets++; |
62e76326 | 844 | |
845 | if ((new_socket = socket(AF_INET, sock_type, proto)) < 0) | |
846 | { | |
847 | /* Increase the number of reserved fd's if calls to socket() | |
848 | * are failing because the open file table is full. This | |
849 | * limits the number of simultaneous clients */ | |
850 | ||
2d8c0b1a | 851 | if (limitError(errno)) { |
bf8fe701 | 852 | debugs(50, 1, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 853 | fdAdjustReserved(); |
2d8c0b1a | 854 | } else { |
bf8fe701 | 855 | debugs(50, 0, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 856 | } |
857 | ||
858 | PROF_stop(comm_open); | |
859 | return -1; | |
090089c4 | 860 | } |
62e76326 | 861 | |
d6827718 | 862 | /* set TOS if needed */ |
62e76326 | 863 | if (TOS) |
864 | { | |
d6827718 | 865 | #ifdef IP_TOS |
62e76326 | 866 | tos = TOS; |
867 | ||
bf8fe701 | 868 | if (setsockopt(new_socket, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)) < 0) { |
869 | debugs(50, 1, "comm_open: setsockopt(IP_TOS) on FD " << new_socket << ": " << xstrerror()); | |
870 | } | |
62e76326 | 871 | |
d6827718 | 872 | #else |
62e76326 | 873 | |
bf8fe701 | 874 | debugs(50, 0, "comm_open: setsockopt(IP_TOS) not supported on this platform"); |
62e76326 | 875 | |
d6827718 | 876 | #endif |
62e76326 | 877 | |
d6827718 | 878 | } |
62e76326 | 879 | |
090089c4 | 880 | /* update fdstat */ |
bf8fe701 | 881 | debugs(5, 5, "comm_open: FD " << new_socket << " is a new socket"); |
62e76326 | 882 | |
5c5783a2 | 883 | fd_open(new_socket, FD_SOCKET, note); |
62e76326 | 884 | |
c4b7a5a9 | 885 | fdd_table[new_socket].close_file = NULL; |
62e76326 | 886 | |
c4b7a5a9 | 887 | fdd_table[new_socket].close_line = 0; |
62e76326 | 888 | |
c4b7a5a9 | 889 | assert(fdc_table[new_socket].active == 0); |
62e76326 | 890 | |
c4b7a5a9 | 891 | fdc_table[new_socket].active = 1; |
62e76326 | 892 | |
76f87348 | 893 | F = &fd_table[new_socket]; |
62e76326 | 894 | |
d6827718 | 895 | F->local_addr = addr; |
62e76326 | 896 | |
d6827718 | 897 | F->tos = tos; |
62e76326 | 898 | |
79a15e0a | 899 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 900 | commSetCloseOnExec(new_socket); |
901 | ||
cdc33f35 | 902 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 903 | commSetReuseAddr(new_socket); |
904 | ||
905 | if (port > (u_short) 0) | |
906 | { | |
a50bfe93 | 907 | #ifdef _SQUID_MSWIN_ |
908 | ||
909 | if (sock_type != SOCK_DGRAM) | |
910 | #endif | |
911 | ||
912 | commSetNoLinger(new_socket); | |
62e76326 | 913 | |
914 | if (opt_reuseaddr) | |
915 | commSetReuseAddr(new_socket); | |
090089c4 | 916 | } |
62e76326 | 917 | |
918 | if (addr.s_addr != no_addr.s_addr) | |
919 | { | |
920 | if (commBind(new_socket, addr, port) != COMM_OK) { | |
921 | comm_close(new_socket); | |
922 | return -1; | |
923 | PROF_stop(comm_open); | |
924 | } | |
23ff6968 | 925 | } |
62e76326 | 926 | |
76f87348 | 927 | F->local_port = port; |
090089c4 | 928 | |
79a15e0a | 929 | if (flags & COMM_NONBLOCKING) |
62e76326 | 930 | if (commSetNonBlocking(new_socket) == COMM_ERROR) |
931 | { | |
932 | return -1; | |
933 | PROF_stop(comm_open); | |
934 | } | |
935 | ||
30a4f2a8 | 936 | #ifdef TCP_NODELAY |
937 | if (sock_type == SOCK_STREAM) | |
62e76326 | 938 | commSetTcpNoDelay(new_socket); |
939 | ||
30a4f2a8 | 940 | #endif |
62e76326 | 941 | |
1241e63e | 942 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 943 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
944 | ||
88bfe092 | 945 | PROF_stop(comm_open); |
62e76326 | 946 | |
090089c4 | 947 | return new_socket; |
948 | } | |
949 | ||
d2d59a68 | 950 | CBDATA_CLASS_INIT(ConnectStateData); |
951 | ||
952 | void * | |
953 | ConnectStateData::operator new (size_t size) | |
954 | { | |
955 | CBDATA_INIT_TYPE(ConnectStateData); | |
956 | return cbdataAlloc(ConnectStateData); | |
957 | } | |
958 | ||
959 | void | |
960 | ConnectStateData::operator delete (void *address) | |
961 | { | |
962 | cbdataFree(address); | |
963 | } | |
964 | ||
e5f6c5c2 | 965 | void |
4f92c80c | 966 | commConnectStart(int fd, const char *host, u_short port, CNCB * callback, void *data) |
e924600d | 967 | { |
28c60158 | 968 | ConnectStateData *cs; |
4a7a3d56 | 969 | debugs(5, 3, "commConnectStart: FD " << fd << ", data " << data << ", " << host << ":" << port); |
d2d59a68 | 970 | cs = new ConnectStateData; |
03a1ee42 | 971 | cs->fd = fd; |
e924600d | 972 | cs->host = xstrdup(host); |
973 | cs->port = port; | |
85a56f15 | 974 | cs->callback = CallBack<CNCB>(callback, data); |
e924600d | 975 | comm_add_close_handler(fd, commConnectFree, cs); |
8407afee | 976 | ipcache_nbgethostbyname(host, commConnectDnsHandle, cs); |
edeb28fd | 977 | } |
978 | ||
979 | static void | |
03a1ee42 | 980 | commConnectDnsHandle(const ipcache_addrs * ia, void *data) |
edeb28fd | 981 | { |
e6ccf245 | 982 | ConnectStateData *cs = (ConnectStateData *)data; |
62e76326 | 983 | |
edeb28fd | 984 | if (ia == NULL) { |
bf8fe701 | 985 | debugs(5, 3, "commConnectDnsHandle: Unknown host: " << cs->host); |
62e76326 | 986 | |
987 | if (!dns_error_message) { | |
988 | dns_error_message = "Unknown DNS error"; | |
bf8fe701 | 989 | debugs(5, 1, "commConnectDnsHandle: Bad dns_error_message"); |
62e76326 | 990 | } |
991 | ||
992 | assert(dns_error_message != NULL); | |
2d8c0b1a | 993 | cs->callCallback(COMM_ERR_DNS, 0); |
62e76326 | 994 | return; |
edeb28fd | 995 | } |
62e76326 | 996 | |
f076b37b | 997 | assert(ia->cur < ia->count); |
edeb28fd | 998 | cs->in_addr = ia->in_addrs[ia->cur]; |
a12a049a | 999 | |
1000 | if (Config.onoff.balance_on_multiple_ip) | |
1001 | ipcacheCycleAddr(cs->host, NULL); | |
1002 | ||
22c653cd | 1003 | cs->addrcount = ia->count; |
a12a049a | 1004 | |
22c653cd | 1005 | cs->connstart = squid_curtime; |
a12a049a | 1006 | |
2d8c0b1a | 1007 | cs->connect(); |
e924600d | 1008 | } |
1009 | ||
2d8c0b1a | 1010 | void |
1011 | ConnectStateData::callCallback(comm_err_t status, int xerrno) | |
1012 | { | |
bf8fe701 | 1013 | debugs(5, 3, "commConnectCallback: FD " << fd << ", data " << callback.data); |
1014 | ||
2d8c0b1a | 1015 | comm_remove_close_handler(fd, commConnectFree, this); |
1016 | CallBack<CNCB> aCallback = callback; | |
1017 | callback = CallBack<CNCB>(); | |
e1b16349 | 1018 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1019 | |
85a56f15 | 1020 | if (aCallback.dataValid()) |
2d8c0b1a | 1021 | aCallback.handler(fd, status, xerrno, aCallback.data); |
62e76326 | 1022 | |
744c68f5 | 1023 | commConnectFree(fd, this); |
f88211e8 | 1024 | } |
1025 | ||
e924600d | 1026 | static void |
9daca08e | 1027 | commConnectFree(int fd, void *data) |
e924600d | 1028 | { |
e6ccf245 | 1029 | ConnectStateData *cs = (ConnectStateData *)data; |
bf8fe701 | 1030 | debugs(5, 3, "commConnectFree: FD " << fd); |
85a56f15 | 1031 | cs->callback = CallBack<CNCB>(); |
8407afee | 1032 | safe_free(cs->host); |
00d77d6b | 1033 | delete cs; |
e924600d | 1034 | } |
1035 | ||
2d8c0b1a | 1036 | static void |
1037 | copyFDFlags(int to, fde *F) | |
1038 | { | |
1039 | if (F->flags.close_on_exec) | |
1040 | commSetCloseOnExec(to); | |
1041 | ||
1042 | if (F->flags.nonblocking) | |
1043 | commSetNonBlocking(to); | |
1044 | ||
1045 | #ifdef TCP_NODELAY | |
1046 | ||
1047 | if (F->flags.nodelay) | |
1048 | commSetTcpNoDelay(to); | |
1049 | ||
1050 | #endif | |
1051 | ||
1052 | if (Config.tcpRcvBufsz > 0) | |
1053 | commSetTcpRcvbuf(to, Config.tcpRcvBufsz); | |
1054 | } | |
1055 | ||
22c653cd | 1056 | /* Reset FD so that we can connect() again */ |
0b77ecd8 | 1057 | int |
1058 | ConnectStateData::commResetFD() | |
edeb28fd | 1059 | { |
0b77ecd8 | 1060 | if (!cbdataReferenceValid(callback.data)) |
62e76326 | 1061 | return 0; |
1062 | ||
83704487 | 1063 | statCounter.syscalls.sock.sockets++; |
62e76326 | 1064 | |
2d8c0b1a | 1065 | int fd2 = socket(AF_INET, SOCK_STREAM, 0); |
62e76326 | 1066 | |
edeb28fd | 1067 | if (fd2 < 0) { |
bf8fe701 | 1068 | debugs(5, 0, "commResetFD: socket: " << xstrerror()); |
62e76326 | 1069 | |
1070 | if (ENFILE == errno || EMFILE == errno) | |
1071 | fdAdjustReserved(); | |
1072 | ||
1073 | return 0; | |
edeb28fd | 1074 | } |
62e76326 | 1075 | |
68aa4272 | 1076 | #ifdef _SQUID_MSWIN_ |
1077 | ||
1078 | /* On Windows dup2() can't work correctly on Sockets, the */ | |
1079 | /* workaround is to close the destination Socket before call them. */ | |
0b77ecd8 | 1080 | close(fd); |
68aa4272 | 1081 | |
1082 | #endif | |
1083 | ||
0b77ecd8 | 1084 | if (dup2(fd2, fd) < 0) { |
bf8fe701 | 1085 | debugs(5, 0, "commResetFD: dup2: " << xstrerror()); |
62e76326 | 1086 | |
1087 | if (ENFILE == errno || EMFILE == errno) | |
1088 | fdAdjustReserved(); | |
1089 | ||
1090 | close(fd2); | |
1091 | ||
1092 | return 0; | |
edeb28fd | 1093 | } |
62e76326 | 1094 | |
edeb28fd | 1095 | close(fd2); |
0b77ecd8 | 1096 | fde *F = &fd_table[fd]; |
1097 | fd_table[fd].flags.called_connect = 0; | |
09544acc | 1098 | /* |
1099 | * yuck, this has assumptions about comm_open() arguments for | |
1100 | * the original socket | |
1101 | */ | |
62e76326 | 1102 | |
0b77ecd8 | 1103 | if (commBind(fd, F->local_addr, F->local_port) != COMM_OK) { |
bf8fe701 | 1104 | debugs(5, 0, "commResetFD: bind: " << xstrerror()); |
62e76326 | 1105 | return 0; |
09544acc | 1106 | } |
62e76326 | 1107 | |
d6827718 | 1108 | #ifdef IP_TOS |
1109 | if (F->tos) { | |
0b77ecd8 | 1110 | if (setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &F->tos, sizeof(int)) < 0) |
bf8fe701 | 1111 | debugs(50, 1, "commResetFD: setsockopt(IP_TOS) on FD " << fd << ": " << xstrerror()); |
d6827718 | 1112 | } |
62e76326 | 1113 | |
d6827718 | 1114 | #endif |
0b77ecd8 | 1115 | copyFDFlags (fd, F); |
62e76326 | 1116 | |
edeb28fd | 1117 | return 1; |
1118 | } | |
1119 | ||
0b77ecd8 | 1120 | int |
1121 | ConnectStateData::commRetryConnect() | |
22c653cd | 1122 | { |
0b77ecd8 | 1123 | assert(addrcount > 0); |
62e76326 | 1124 | |
0b77ecd8 | 1125 | if (addrcount == 1) { |
1126 | if (tries >= Config.retry.maxtries) | |
62e76326 | 1127 | return 0; |
1128 | ||
0b77ecd8 | 1129 | if (squid_curtime - connstart > Config.Timeout.connect) |
62e76326 | 1130 | return 0; |
22c653cd | 1131 | } else { |
0b77ecd8 | 1132 | if (tries > addrcount) |
62e76326 | 1133 | return 0; |
22c653cd | 1134 | } |
62e76326 | 1135 | |
0b77ecd8 | 1136 | return commResetFD(); |
22c653cd | 1137 | } |
1138 | ||
4ed0e075 | 1139 | static void |
1140 | commReconnect(void *data) | |
1141 | { | |
1142 | ConnectStateData *cs = (ConnectStateData *)data; | |
1143 | ipcache_nbgethostbyname(cs->host, commConnectDnsHandle, cs); | |
1144 | } | |
1145 | ||
e924600d | 1146 | /* Connect SOCK to specified DEST_PORT at DEST_HOST. */ |
2d8c0b1a | 1147 | void |
1148 | ConnectStateData::Connect (int fd, void *me) | |
090089c4 | 1149 | { |
2d8c0b1a | 1150 | ConnectStateData *cs = (ConnectStateData *)me; |
1151 | assert (cs->fd == fd); | |
1152 | cs->connect(); | |
1153 | } | |
1154 | ||
1155 | void | |
1156 | ConnectStateData::defaults() | |
1157 | { | |
1158 | S.sin_family = AF_INET; | |
1159 | S.sin_addr = in_addr; | |
1160 | S.sin_port = htons(port); | |
2d8c0b1a | 1161 | } |
62e76326 | 1162 | |
2d8c0b1a | 1163 | void |
1164 | ConnectStateData::connect() | |
1165 | { | |
1166 | if (S.sin_addr.s_addr == 0) | |
1167 | defaults(); | |
62e76326 | 1168 | |
2d8c0b1a | 1169 | switch (comm_connect_addr(fd, &S)) { |
62e76326 | 1170 | |
e5f6c5c2 | 1171 | case COMM_INPROGRESS: |
bf8fe701 | 1172 | debugs(5, 5, "ConnectStateData::connect: FD " << fd << ": COMM_INPROGRESS"); |
2d8c0b1a | 1173 | commSetSelect(fd, COMM_SELECT_WRITE, ConnectStateData::Connect, this, 0); |
62e76326 | 1174 | break; |
1175 | ||
e5f6c5c2 | 1176 | case COMM_OK: |
2d8c0b1a | 1177 | ipcacheMarkGoodAddr(host, S.sin_addr); |
1178 | callCallback(COMM_OK, 0); | |
62e76326 | 1179 | break; |
1180 | ||
e5f6c5c2 | 1181 | default: |
2d8c0b1a | 1182 | tries++; |
1183 | ipcacheMarkBadAddr(host, S.sin_addr); | |
62e76326 | 1184 | |
1185 | if (Config.onoff.test_reachability) | |
2d8c0b1a | 1186 | netdbDeleteAddrNetwork(S.sin_addr); |
62e76326 | 1187 | |
0b77ecd8 | 1188 | if (commRetryConnect()) { |
4ed0e075 | 1189 | eventAdd("commReconnect", commReconnect, this, this->addrcount == 1 ? 0.05 : 0.0, 0); |
62e76326 | 1190 | } else { |
2d8c0b1a | 1191 | callCallback(COMM_ERR_CONNECT, errno); |
62e76326 | 1192 | } |
090089c4 | 1193 | } |
090089c4 | 1194 | } |
22c653cd | 1195 | |
b8d8561b | 1196 | int |
4f92c80c | 1197 | commSetTimeout(int fd, int timeout, PF * handler, void *data) |
090089c4 | 1198 | { |
bf8fe701 | 1199 | debugs(5, 3, "commSetTimeout: FD " << fd << " timeout " << timeout); |
03eb2f01 | 1200 | assert(fd >= 0); |
1201 | assert(fd < Squid_MaxFD); | |
2d8c0b1a | 1202 | fde *F = &fd_table[fd]; |
60c0b5a2 | 1203 | assert(F->flags.open); |
62e76326 | 1204 | |
5c5783a2 | 1205 | if (timeout < 0) { |
62e76326 | 1206 | cbdataReferenceDone(F->timeout_data); |
1207 | F->timeout_handler = NULL; | |
1208 | F->timeout = 0; | |
5849612f | 1209 | } else { |
62e76326 | 1210 | if (handler) { |
1211 | cbdataReferenceDone(F->timeout_data); | |
1212 | F->timeout_handler = handler; | |
1213 | F->timeout_data = cbdataReference(data); | |
1214 | } | |
1215 | ||
1216 | F->timeout = squid_curtime + (time_t) timeout; | |
30a4f2a8 | 1217 | } |
62e76326 | 1218 | |
a3fa14bf | 1219 | return F->timeout; |
090089c4 | 1220 | } |
1221 | ||
b8d8561b | 1222 | int |
62e76326 | 1223 | |
0ee4272b | 1224 | comm_connect_addr(int sock, const struct sockaddr_in *address) |
090089c4 | 1225 | { |
3d7e9d7c | 1226 | comm_err_t status = COMM_OK; |
76f87348 | 1227 | fde *F = &fd_table[sock]; |
090089c4 | 1228 | int x; |
b5568a61 | 1229 | int err = 0; |
9689d97c | 1230 | socklen_t errlen; |
489b22c1 | 1231 | assert(ntohs(address->sin_port) != 0); |
88bfe092 | 1232 | PROF_start(comm_connect_addr); |
090089c4 | 1233 | /* Establish connection. */ |
b5568a61 | 1234 | errno = 0; |
62e76326 | 1235 | |
1236 | if (!F->flags.called_connect) | |
1237 | { | |
1238 | F->flags.called_connect = 1; | |
1239 | statCounter.syscalls.sock.connects++; | |
1240 | ||
1241 | x = connect(sock, (struct sockaddr *) address, sizeof(*address)); | |
1242 | ||
1243 | if (x < 0) | |
bf8fe701 | 1244 | debugs(5, 9, "connect FD " << sock << ": " << xstrerror()); |
62e76326 | 1245 | } else |
1246 | { | |
140e2c0b | 1247 | #if defined(_SQUID_NEWSOS6_) |
62e76326 | 1248 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
1249 | ||
1250 | connect(sock, (struct sockaddr *) address, sizeof(*address)); | |
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 | |
88bfe092 | 1283 | PROF_stop(comm_connect_addr); |
62e76326 | 1284 | |
b5568a61 | 1285 | if (errno == 0 || errno == EISCONN) |
62e76326 | 1286 | status = COMM_OK; |
b5568a61 | 1287 | else if (ignoreErrno(errno)) |
62e76326 | 1288 | status = COMM_INPROGRESS; |
b5568a61 | 1289 | else |
62e76326 | 1290 | return COMM_ERROR; |
1291 | ||
76f87348 | 1292 | xstrncpy(F->ipaddr, inet_ntoa(address->sin_addr), 16); |
62e76326 | 1293 | |
76f87348 | 1294 | F->remote_port = ntohs(address->sin_port); |
62e76326 | 1295 | |
1296 | if (status == COMM_OK) | |
1297 | { | |
bf8fe701 | 1298 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connected to " << F->ipaddr << ":" << F->remote_port); |
62e76326 | 1299 | } else if (status == COMM_INPROGRESS) |
1300 | { | |
bf8fe701 | 1301 | debugs(5, 10, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 1302 | } |
62e76326 | 1303 | |
090089c4 | 1304 | return status; |
1305 | } | |
1306 | ||
1307 | /* Wait for an incoming connection on FD. FD should be a socket returned | |
1308 | * from comm_listen. */ | |
ee0989f2 | 1309 | static int |
1310 | comm_old_accept(int fd, ConnectionDetail &details) | |
090089c4 | 1311 | { |
88bfe092 | 1312 | PROF_start(comm_accept); |
ee0989f2 | 1313 | statCounter.syscalls.sock.accepts++; |
1314 | int sock; | |
1315 | socklen_t Slen = sizeof(details.peer); | |
62e76326 | 1316 | |
ee0989f2 | 1317 | if ((sock = accept(fd, (struct sockaddr *) &details.peer, &Slen)) < 0) { |
62e76326 | 1318 | PROF_stop(comm_accept); |
1319 | ||
1320 | if (ignoreErrno(errno)) | |
1321 | { | |
bf8fe701 | 1322 | debugs(50, 5, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1323 | return COMM_NOMESSAGE; |
1324 | } else if (ENFILE == errno || EMFILE == errno) | |
1325 | { | |
bf8fe701 | 1326 | debugs(50, 3, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1327 | return COMM_ERROR; |
1328 | } else | |
1329 | { | |
bf8fe701 | 1330 | debugs(50, 1, "comm_old_accept: FD " << fd << ": " << xstrerror()); |
62e76326 | 1331 | return COMM_ERROR; |
1332 | } | |
090089c4 | 1333 | } |
62e76326 | 1334 | |
ee0989f2 | 1335 | Slen = sizeof(details.me); |
1336 | memset(&details.me, '\0', Slen); | |
62e76326 | 1337 | |
ee0989f2 | 1338 | getsockname(sock, (struct sockaddr *) &details.me, &Slen); |
3ca60c86 | 1339 | commSetCloseOnExec(sock); |
090089c4 | 1340 | /* fdstat update */ |
5c5783a2 | 1341 | fd_open(sock, FD_SOCKET, "HTTP Request"); |
c4b7a5a9 | 1342 | fdd_table[sock].close_file = NULL; |
1343 | fdd_table[sock].close_line = 0; | |
1344 | fdc_table[sock].active = 1; | |
ee0989f2 | 1345 | fde *F = &fd_table[sock]; |
1346 | xstrncpy(F->ipaddr, inet_ntoa(details.peer.sin_addr), 16); | |
1347 | F->remote_port = htons(details.peer.sin_port); | |
1348 | F->local_port = htons(details.me.sin_port); | |
090089c4 | 1349 | commSetNonBlocking(sock); |
88bfe092 | 1350 | PROF_stop(comm_accept); |
090089c4 | 1351 | return sock; |
1352 | } | |
1353 | ||
cb201b7e | 1354 | void |
1355 | commCallCloseHandlers(int fd) | |
1356 | { | |
76f87348 | 1357 | fde *F = &fd_table[fd]; |
bf8fe701 | 1358 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 1359 | |
8000a965 | 1360 | while (F->closeHandler != NULL) { |
62e76326 | 1361 | close_handler ch = *F->closeHandler; |
b001e822 | 1362 | conn_close_pool->free(F->closeHandler); /* AAA */ |
62e76326 | 1363 | F->closeHandler = ch.next; |
1364 | ch.next = NULL; | |
bf8fe701 | 1365 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << ch.handler << " data=" << ch.data); |
62e76326 | 1366 | |
1367 | if (cbdataReferenceValid(ch.data)) | |
1368 | ch.handler(fd, ch.data); | |
1369 | ||
1370 | cbdataReferenceDone(ch.data); | |
cb201b7e | 1371 | } |
1372 | } | |
1373 | ||
5492ad1d | 1374 | #if LINGERING_CLOSE |
1375 | static void | |
1376 | commLingerClose(int fd, void *unused) | |
1377 | { | |
1378 | LOCAL_ARRAY(char, buf, 1024); | |
1379 | int n; | |
1f7c9178 | 1380 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 1381 | |
5492ad1d | 1382 | if (n < 0) |
bf8fe701 | 1383 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 1384 | |
5492ad1d | 1385 | comm_close(fd); |
1386 | } | |
1387 | ||
1388 | static void | |
1389 | commLingerTimeout(int fd, void *unused) | |
1390 | { | |
bf8fe701 | 1391 | debugs(5, 3, "commLingerTimeout: FD " << fd); |
5492ad1d | 1392 | comm_close(fd); |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Inspired by apache | |
1397 | */ | |
1398 | void | |
1399 | comm_lingering_close(int fd) | |
1400 | { | |
d4c19b39 | 1401 | #if USE_SSL |
62e76326 | 1402 | |
d4c19b39 | 1403 | if (fd_table[fd].ssl) |
62e76326 | 1404 | ssl_shutdown_method(fd); |
1405 | ||
d4c19b39 | 1406 | #endif |
62e76326 | 1407 | |
5492ad1d | 1408 | if (shutdown(fd, 1) < 0) { |
62e76326 | 1409 | comm_close(fd); |
1410 | return; | |
5492ad1d | 1411 | } |
62e76326 | 1412 | |
5492ad1d | 1413 | fd_note(fd, "lingering close"); |
1414 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
1415 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
1416 | } | |
62e76326 | 1417 | |
5492ad1d | 1418 | #endif |
1419 | ||
98264874 | 1420 | /* |
1421 | * enable linger with time of 0 so that when the socket is | |
1422 | * closed, TCP generates a RESET | |
1423 | */ | |
1424 | void | |
1425 | comm_reset_close(int fd) | |
1426 | { | |
62e76326 | 1427 | |
98264874 | 1428 | struct linger L; |
1429 | L.l_onoff = 1; | |
1430 | L.l_linger = 0; | |
62e76326 | 1431 | |
98264874 | 1432 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1433 | debugs(50, 0, "commResetTCPClose: FD " << fd << ": " << xstrerror()); |
62e76326 | 1434 | |
98264874 | 1435 | comm_close(fd); |
1436 | } | |
1437 | ||
2d8c0b1a | 1438 | void |
1439 | CommRead::nullCallback() | |
1440 | { | |
1441 | callback = CallBack<IOCB>(); | |
1442 | } | |
1443 | ||
1444 | void | |
1445 | AcceptFD::nullCallback() | |
1446 | { | |
1447 | callback = CallBack<IOACB>(); | |
1448 | } | |
1449 | ||
1450 | void | |
1451 | CommRead::doCallback(comm_err_t errcode, int xerrno) | |
1452 | { | |
1453 | if (callback.handler) | |
1454 | callback.handler(fd, buf, 0, errcode, xerrno, callback.data); | |
1455 | ||
1456 | nullCallback(); | |
1457 | } | |
1458 | ||
1459 | void | |
1460 | AcceptFD::doCallback(int fd, int newfd, comm_err_t errcode, int xerrno, ConnectionDetail *connDetails) | |
1461 | { | |
1462 | if (callback.handler) { | |
1463 | CallBack<IOACB> aCallback = callback; | |
1464 | nullCallback(); | |
1465 | aCallback.handler(fd, newfd, connDetails, errcode, xerrno, aCallback.data); | |
1466 | } | |
1467 | } | |
c4b7a5a9 | 1468 | |
1469 | /* | |
1470 | * Close the socket fd. | |
1471 | * | |
1472 | * + call write handlers with ERR_CLOSING | |
1473 | * + call read handlers with ERR_CLOSING | |
1474 | * + call closing handlers | |
a46d2c0e | 1475 | * |
1476 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a | |
1477 | * DeferredReadManager. | |
c4b7a5a9 | 1478 | */ |
b8d8561b | 1479 | void |
43ae1d95 | 1480 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1481 | { |
76f87348 | 1482 | fde *F = NULL; |
c4b7a5a9 | 1483 | dlink_node *node; |
1484 | CommCallbackData *cio; | |
1f7c9178 | 1485 | |
bf8fe701 | 1486 | debugs(5, 5, "comm_close: FD " << fd); |
03eb2f01 | 1487 | assert(fd >= 0); |
1488 | assert(fd < Squid_MaxFD); | |
76f87348 | 1489 | F = &fd_table[fd]; |
c4b7a5a9 | 1490 | fdd_table[fd].close_file = file; |
1491 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1492 | |
58a6c186 | 1493 | if (F->flags.closing) |
62e76326 | 1494 | return; |
1495 | ||
60c0b5a2 | 1496 | if (shutting_down && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1497 | return; |
1498 | ||
60c0b5a2 | 1499 | assert(F->flags.open); |
62e76326 | 1500 | |
c4b7a5a9 | 1501 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
62e76326 | 1502 | assert(fdc_table[fd].active == 1); |
1503 | ||
76f87348 | 1504 | assert(F->type != FD_FILE); |
62e76326 | 1505 | |
88bfe092 | 1506 | PROF_start(comm_close); |
62e76326 | 1507 | |
58a6c186 | 1508 | F->flags.closing = 1; |
62e76326 | 1509 | |
d4c19b39 | 1510 | #if USE_SSL |
62e76326 | 1511 | |
d4c19b39 | 1512 | if (F->ssl) |
62e76326 | 1513 | ssl_shutdown_method(fd); |
1514 | ||
d4c19b39 | 1515 | #endif |
62e76326 | 1516 | |
fa80a8ef | 1517 | commSetTimeout(fd, -1, NULL, NULL); |
62e76326 | 1518 | |
2b663917 | 1519 | /* new-style read/write handler stuff */ |
1520 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { | |
1521 | commio_complete_callback(fd, COMMIO_FD_WRITECB(fd), COMM_ERR_CLOSING, errno); | |
1522 | commio_call_callback(COMMIO_FD_WRITECB(fd)); | |
1523 | } | |
1524 | if (commio_has_callback(fd, IOCB_READ, COMMIO_FD_READCB(fd))) { | |
1525 | commio_complete_callback(fd, COMMIO_FD_READCB(fd), COMM_ERR_CLOSING, errno); | |
1526 | commio_call_callback(COMMIO_FD_READCB(fd)); | |
1527 | } | |
2d8c0b1a | 1528 | |
2b663917 | 1529 | /* Do callbacks for read/accept routines, if any */ |
2d8c0b1a | 1530 | fdc_table[fd].accept.accept.doCallback(fd, -1, COMM_ERR_CLOSING, 0, NULL); |
62e76326 | 1531 | |
511e2383 | 1532 | /* Complete (w/ COMM_ERR_CLOSING!) any pending io callbacks */ |
c4b7a5a9 | 1533 | while (fdc_table[fd].CommCallbackList.head != NULL) { |
62e76326 | 1534 | node = fdc_table[fd].CommCallbackList.head; |
1535 | cio = (CommCallbackData *)node->data; | |
2d8c0b1a | 1536 | assert(fd == cio->result.fd); /* just paranoid */ |
62e76326 | 1537 | /* We're closing! */ |
2d8c0b1a | 1538 | cio->fdClosing(); |
1539 | cio->callACallback(); | |
00d77d6b | 1540 | delete cio; |
c4b7a5a9 | 1541 | } |
1542 | ||
cb201b7e | 1543 | commCallCloseHandlers(fd); |
62e76326 | 1544 | |
781ce8ff | 1545 | if (F->pconn.uses) |
1546 | F->pconn.pool->count(F->pconn.uses); | |
62e76326 | 1547 | |
a7ad6e4e | 1548 | comm_empty_os_read_buffers(fd); |
62e76326 | 1549 | |
d4c19b39 | 1550 | #if USE_SSL |
62e76326 | 1551 | |
d4c19b39 | 1552 | if (F->ssl) { |
62e76326 | 1553 | SSL_free(F->ssl); |
1554 | F->ssl = NULL; | |
d4c19b39 | 1555 | } |
62e76326 | 1556 | |
d4c19b39 | 1557 | #endif |
5c5783a2 | 1558 | fd_close(fd); /* update fdstat */ |
62e76326 | 1559 | |
5874bf28 | 1560 | close(fd); |
62e76326 | 1561 | |
c4b7a5a9 | 1562 | fdc_table[fd].active = 0; |
62e76326 | 1563 | |
a46d2c0e | 1564 | if (fdc_table[fd].half_closed) { |
1565 | AbortChecker::Instance().stopMonitoring(fd); | |
1566 | fdc_table[fd].half_closed = false; | |
1567 | } | |
1568 | ||
2d8c0b1a | 1569 | fdc_table[fd] = fdc_t(fd); |
62e76326 | 1570 | |
83704487 | 1571 | statCounter.syscalls.sock.closes++; |
62e76326 | 1572 | |
88bfe092 | 1573 | PROF_stop(comm_close); |
a46d2c0e | 1574 | /* When an fd closes, give accept() a chance, if need be */ |
1575 | ||
1576 | if (fdNFree() >= RESERVED_FD) | |
1577 | AcceptLimiter::Instance().kick(); | |
090089c4 | 1578 | } |
1579 | ||
090089c4 | 1580 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1581 | int |
5df61230 | 1582 | comm_udp_sendto(int fd, |
62e76326 | 1583 | |
1584 | const struct sockaddr_in *to_addr, | |
1585 | int addr_len, | |
1586 | const void *buf, | |
1587 | int len) | |
090089c4 | 1588 | { |
5df61230 | 1589 | int x; |
88bfe092 | 1590 | PROF_start(comm_udp_sendto); |
83704487 | 1591 | statCounter.syscalls.sock.sendtos++; |
62e76326 | 1592 | |
5df61230 | 1593 | x = sendto(fd, buf, len, 0, (struct sockaddr *) to_addr, addr_len); |
88bfe092 | 1594 | PROF_stop(comm_udp_sendto); |
62e76326 | 1595 | |
2d8c0b1a | 1596 | if (x >= 0) |
1597 | return x; | |
1598 | ||
17d51783 | 1599 | #ifdef _SQUID_LINUX_ |
62e76326 | 1600 | |
2d8c0b1a | 1601 | if (ECONNREFUSED != errno) |
17d51783 | 1602 | #endif |
62e76326 | 1603 | |
bf8fe701 | 1604 | debugs(50, 1, "comm_udp_sendto: FD " << fd << ", " << |
1605 | inet_ntoa(to_addr->sin_addr) << ", port " << | |
1606 | (int) htons(to_addr->sin_port) << ": " << xstrerror()); | |
62e76326 | 1607 | |
2d8c0b1a | 1608 | return COMM_ERROR; |
090089c4 | 1609 | } |
1610 | ||
b8d8561b | 1611 | void |
582b6456 | 1612 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 1613 | { |
b001e822 | 1614 | close_handler *newHandler = (close_handler *)conn_close_pool->alloc(); /* AAA */ |
cddc721b | 1615 | close_handler *c; |
bf8fe701 | 1616 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1617 | handler << ", data=" << data); | |
62e76326 | 1618 | |
29b8d8d6 | 1619 | for (c = fd_table[fd].closeHandler; c; c = c->next) |
62e76326 | 1620 | assert(c->handler != handler || c->data != data); |
1621 | ||
e6ccf245 | 1622 | newHandler->handler = handler; |
62e76326 | 1623 | |
e6ccf245 | 1624 | newHandler->data = cbdataReference(data); |
62e76326 | 1625 | |
e6ccf245 | 1626 | newHandler->next = fd_table[fd].closeHandler; |
62e76326 | 1627 | |
e6ccf245 | 1628 | fd_table[fd].closeHandler = newHandler; |
30a4f2a8 | 1629 | } |
1630 | ||
b8d8561b | 1631 | void |
582b6456 | 1632 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 1633 | { |
2f0fda5b | 1634 | assert (fdc_table[fd].active); |
f1dc9b30 | 1635 | close_handler *p; |
1636 | close_handler *last = NULL; | |
30a4f2a8 | 1637 | /* Find handler in list */ |
bf8fe701 | 1638 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1639 | handler << ", data=" << data); | |
62e76326 | 1640 | |
29b8d8d6 | 1641 | for (p = fd_table[fd].closeHandler; p != NULL; last = p, p = p->next) |
62e76326 | 1642 | if (p->handler == handler && p->data == data) |
1643 | break; /* This is our handler */ | |
1644 | ||
f88211e8 | 1645 | assert(p != NULL); |
62e76326 | 1646 | |
30a4f2a8 | 1647 | /* Remove list entry */ |
1648 | if (last) | |
62e76326 | 1649 | last->next = p->next; |
30a4f2a8 | 1650 | else |
62e76326 | 1651 | fd_table[fd].closeHandler = p->next; |
1652 | ||
fa80a8ef | 1653 | cbdataReferenceDone(p->data); |
62e76326 | 1654 | |
b001e822 | 1655 | conn_close_pool->free(p); |
30a4f2a8 | 1656 | } |
090089c4 | 1657 | |
b8d8561b | 1658 | static void |
1659 | commSetNoLinger(int fd) | |
30a4f2a8 | 1660 | { |
62e76326 | 1661 | |
30a4f2a8 | 1662 | struct linger L; |
090089c4 | 1663 | L.l_onoff = 0; /* off */ |
1664 | L.l_linger = 0; | |
62e76326 | 1665 | |
30a4f2a8 | 1666 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1667 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1668 | |
58a6c186 | 1669 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1670 | } |
1671 | ||
b8d8561b | 1672 | static void |
1673 | commSetReuseAddr(int fd) | |
090089c4 | 1674 | { |
1675 | int on = 1; | |
62e76326 | 1676 | |
30a4f2a8 | 1677 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1678 | debugs(50, 1, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1679 | } |
1680 | ||
b8d8561b | 1681 | static void |
1682 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1683 | { |
1684 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
bf8fe701 | 1685 | debugs(50, 1, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
f868539a | 1686 | } |
1687 | ||
b8d8561b | 1688 | int |
1689 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1690 | { |
a50bfe93 | 1691 | #ifndef _SQUID_MSWIN_ |
731e4d49 | 1692 | int flags; |
9e205701 | 1693 | int dummy = 0; |
a50bfe93 | 1694 | #endif |
ec4daaa5 | 1695 | #ifdef _SQUID_WIN32_ |
62e76326 | 1696 | |
b05490a8 | 1697 | int nonblocking = TRUE; |
62e76326 | 1698 | |
629b5f75 | 1699 | #ifdef _SQUID_CYGWIN_ |
1700 | ||
7f6ffd15 | 1701 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1702 | #endif |
1703 | ||
62e76326 | 1704 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1705 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1706 | return COMM_ERROR; |
1707 | } | |
629b5f75 | 1708 | |
1709 | #ifdef _SQUID_CYGWIN_ | |
1710 | ||
7f6ffd15 | 1711 | } else { |
1712 | #endif | |
629b5f75 | 1713 | #endif |
a50bfe93 | 1714 | #ifndef _SQUID_MSWIN_ |
62e76326 | 1715 | |
1716 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1717 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1718 | return COMM_ERROR; |
1719 | } | |
1720 | ||
1721 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1722 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1723 | return COMM_ERROR; |
1724 | } | |
1725 | ||
a50bfe93 | 1726 | #endif |
629b5f75 | 1727 | #ifdef _SQUID_CYGWIN_ |
62e76326 | 1728 | |
090089c4 | 1729 | } |
62e76326 | 1730 | |
7f6ffd15 | 1731 | #endif |
58a6c186 | 1732 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1733 | |
090089c4 | 1734 | return 0; |
1735 | } | |
1736 | ||
7e3ce7b9 | 1737 | int |
1738 | commUnsetNonBlocking(int fd) | |
1739 | { | |
a50bfe93 | 1740 | #ifdef _SQUID_MSWIN_ |
1741 | int nonblocking = FALSE; | |
1742 | ||
1743 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1744 | #else | |
7e3ce7b9 | 1745 | int flags; |
1746 | int dummy = 0; | |
62e76326 | 1747 | |
7e3ce7b9 | 1748 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1749 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1750 | return COMM_ERROR; |
7e3ce7b9 | 1751 | } |
62e76326 | 1752 | |
7e3ce7b9 | 1753 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1754 | #endif |
bf8fe701 | 1755 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1756 | return COMM_ERROR; |
7e3ce7b9 | 1757 | } |
62e76326 | 1758 | |
7e3ce7b9 | 1759 | fd_table[fd].flags.nonblocking = 0; |
1760 | return 0; | |
1761 | } | |
1762 | ||
b8d8561b | 1763 | void |
a50bfe93 | 1764 | commSetCloseOnExec(int fd) { |
3ca60c86 | 1765 | #ifdef FD_CLOEXEC |
731e4d49 | 1766 | int flags; |
7a18b487 | 1767 | int dummy = 0; |
62e76326 | 1768 | |
c7989865 | 1769 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1770 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1771 | return; |
3ca60c86 | 1772 | } |
62e76326 | 1773 | |
24382924 | 1774 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1775 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1776 | |
d6827718 | 1777 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1778 | |
3ca60c86 | 1779 | #endif |
1780 | } | |
1781 | ||
e90100aa | 1782 | #ifdef TCP_NODELAY |
1783 | static void | |
a50bfe93 | 1784 | commSetTcpNoDelay(int fd) { |
e90100aa | 1785 | int on = 1; |
62e76326 | 1786 | |
e90100aa | 1787 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
bf8fe701 | 1788 | debugs(50, 1, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1789 | |
d6827718 | 1790 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1791 | } |
62e76326 | 1792 | |
e90100aa | 1793 | #endif |
1794 | ||
6a988308 | 1795 | |
d86b3703 | 1796 | void |
a50bfe93 | 1797 | comm_init(void) { |
c4b7a5a9 | 1798 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1799 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1800 | fdc_table = new fdc_t[Squid_MaxFD]; |
2b663917 | 1801 | commfd_table = (comm_fd_t *) xcalloc(Squid_MaxFD, sizeof(comm_fd_t)); |
2d8c0b1a | 1802 | |
2b663917 | 1803 | for (int pos = 0; pos < Squid_MaxFD; ++pos) { |
2d8c0b1a | 1804 | fdc_table[pos] = fdc_t(pos); |
2b663917 | 1805 | } |
1806 | for (int pos = 0; pos < Squid_MaxFD; pos++) { | |
1807 | commfd_table[pos].fd = pos; | |
1808 | commfd_table[pos].readcb.fd = pos; | |
1809 | commfd_table[pos].readcb.type = IOCB_READ; | |
1810 | commfd_table[pos].writecb.fd = pos; | |
1811 | commfd_table[pos].writecb.type = IOCB_WRITE; | |
1812 | } | |
2d8c0b1a | 1813 | |
59c4d35b | 1814 | /* XXX account fd_table */ |
090089c4 | 1815 | /* Keep a few file descriptors free so that we don't run out of FD's |
1816 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1817 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
0254ee29 | 1818 | RESERVED_FD = XMIN(100, Squid_MaxFD / 4); |
2d8c0b1a | 1819 | |
04eb0689 | 1820 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
090089c4 | 1821 | } |
1822 | ||
30a4f2a8 | 1823 | /* Write to FD. */ |
b8d8561b | 1824 | static void |
a50bfe93 | 1825 | commHandleWrite(int fd, void *data) { |
2b663917 | 1826 | comm_io_callback_t *state = (comm_io_callback_t *)data; |
30a4f2a8 | 1827 | int len = 0; |
1828 | int nleft; | |
1829 | ||
2b663917 | 1830 | assert(state == COMMIO_FD_WRITECB(fd)); |
1831 | ||
88bfe092 | 1832 | PROF_start(commHandleWrite); |
bf8fe701 | 1833 | debugs(5, 5, "commHandleWrite: FD " << fd << ": off " << |
1834 | (long int) state->offset << ", sz " << (long int) state->size << "."); | |
30a4f2a8 | 1835 | |
1836 | nleft = state->size - state->offset; | |
1f7c9178 | 1837 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
bf8fe701 | 1838 | debugs(5, 5, "commHandleWrite: write() returns " << len); |
b69f7771 | 1839 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 1840 | statCounter.syscalls.sock.writes++; |
30a4f2a8 | 1841 | |
1842 | if (len == 0) { | |
62e76326 | 1843 | /* Note we even call write if nleft == 0 */ |
1844 | /* We're done */ | |
1845 | ||
1846 | if (nleft != 0) | |
bf8fe701 | 1847 | debugs(5, 1, "commHandleWrite: FD " << fd << ": write failure: connection closed with " << nleft << " bytes remaining."); |
62e76326 | 1848 | |
2b663917 | 1849 | commio_complete_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
30a4f2a8 | 1850 | } else if (len < 0) { |
62e76326 | 1851 | /* An error */ |
1852 | ||
1853 | if (fd_table[fd].flags.socket_eof) { | |
bf8fe701 | 1854 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
2b663917 | 1855 | commio_complete_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1856 | } else if (ignoreErrno(errno)) { |
bf8fe701 | 1857 | debugs(50, 10, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
62e76326 | 1858 | commSetSelect(fd, |
1859 | COMM_SELECT_WRITE, | |
1860 | commHandleWrite, | |
1861 | state, | |
1862 | 0); | |
1863 | } else { | |
bf8fe701 | 1864 | debugs(50, 2, "commHandleWrite: FD " << fd << ": write failure: " << xstrerror() << "."); |
2b663917 | 1865 | commio_complete_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_ERROR : COMM_OK, errno); |
62e76326 | 1866 | } |
30a4f2a8 | 1867 | } else { |
62e76326 | 1868 | /* A successful write, continue */ |
1869 | state->offset += len; | |
1870 | ||
1871 | if (state->offset < (off_t)state->size) { | |
1872 | /* Not done, reinstall the write handler and write some more */ | |
1873 | commSetSelect(fd, | |
1874 | COMM_SELECT_WRITE, | |
1875 | commHandleWrite, | |
1876 | state, | |
1877 | 0); | |
1878 | } else { | |
2b663917 | 1879 | commio_complete_callback(fd, COMMIO_FD_WRITECB(fd), nleft ? COMM_OK : COMM_ERROR, errno); |
62e76326 | 1880 | } |
30a4f2a8 | 1881 | } |
62e76326 | 1882 | |
88bfe092 | 1883 | PROF_stop(commHandleWrite); |
30a4f2a8 | 1884 | } |
1885 | ||
7cd8c414 | 1886 | /* |
1887 | * Queue a write. handler/handler_data are called when the write | |
1888 | * completes, on error, or on file descriptor close. | |
1889 | * | |
1890 | * free_func is used to free the passed buffer when the write has completed. | |
1891 | */ | |
b8d8561b | 1892 | void |
2b663917 | 1893 | comm_write(int fd, const char *buf, int size, IOCB * handler, void *handler_data, FREE * free_func) |
1894 | { | |
c4b7a5a9 | 1895 | assert(!fd_table[fd].flags.closing); |
1896 | ||
bf8fe701 | 1897 | debugs(5, 5, "comm_write: FD " << fd << ": sz " << size << ": hndl " << handler << ": data " << handler_data << "."); |
62e76326 | 1898 | |
2b663917 | 1899 | if (commio_has_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd))) { |
dec5db5d | 1900 | /* This means that the write has been scheduled, but has not |
1901 | * triggered yet | |
1902 | */ | |
2b663917 | 1903 | fatalf ("comm_write: fd %d: pending callback!\n", fd); |
6cf028ab | 1904 | } |
2b663917 | 1905 | /* XXX ugly */ |
1906 | commio_set_callback(fd, IOCB_WRITE, COMMIO_FD_WRITECB(fd), handler, handler_data, (char *)buf, free_func, size); | |
1907 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, COMMIO_FD_WRITECB(fd), 0); | |
30a4f2a8 | 1908 | } |
26a880e2 | 1909 | |
137ee196 | 1910 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 1911 | void |
2b663917 | 1912 | comm_write_mbuf(int fd, MemBuf *mb, IOCB * handler, void *handler_data) { |
1913 | comm_write(fd, mb->buf, mb->size, handler, handler_data, mb->freeFunc()); | |
cb69b4c7 | 1914 | } |
1915 | ||
c4b7a5a9 | 1916 | |
89924214 | 1917 | /* |
1918 | * hm, this might be too general-purpose for all the places we'd | |
1919 | * like to use it. | |
1920 | */ | |
b224ea98 | 1921 | int |
a50bfe93 | 1922 | ignoreErrno(int ierrno) { |
603500e7 | 1923 | switch (ierrno) { |
62e76326 | 1924 | |
89924214 | 1925 | case EINPROGRESS: |
62e76326 | 1926 | |
603500e7 | 1927 | case EWOULDBLOCK: |
26a880e2 | 1928 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 1929 | |
603500e7 | 1930 | case EAGAIN: |
26a880e2 | 1931 | #endif |
62e76326 | 1932 | |
603500e7 | 1933 | case EALREADY: |
62e76326 | 1934 | |
603500e7 | 1935 | case EINTR: |
db494ab8 | 1936 | #ifdef ERESTART |
62e76326 | 1937 | |
db494ab8 | 1938 | case ERESTART: |
1939 | #endif | |
62e76326 | 1940 | |
1941 | return 1; | |
1942 | ||
603500e7 | 1943 | default: |
62e76326 | 1944 | return 0; |
603500e7 | 1945 | } |
62e76326 | 1946 | |
603500e7 | 1947 | /* NOTREACHED */ |
26a880e2 | 1948 | } |
d723bf6b | 1949 | |
1950 | void | |
a50bfe93 | 1951 | commCloseAllSockets(void) { |
d723bf6b | 1952 | int fd; |
1953 | fde *F = NULL; | |
62e76326 | 1954 | |
d723bf6b | 1955 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 1956 | F = &fd_table[fd]; |
1957 | ||
1958 | if (!F->flags.open) | |
1959 | continue; | |
1960 | ||
1961 | if (F->type != FD_SOCKET) | |
1962 | continue; | |
1963 | ||
1964 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
1965 | continue; | |
1966 | ||
1967 | if (F->timeout_handler) { | |
1968 | PF *callback = F->timeout_handler; | |
1969 | void *cbdata = NULL; | |
1970 | F->timeout_handler = NULL; | |
bf8fe701 | 1971 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
62e76326 | 1972 | |
1973 | if (cbdataReferenceValidDone(F->timeout_data, &cbdata)) | |
1974 | callback(fd, cbdata); | |
1975 | } else { | |
bf8fe701 | 1976 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_close()"); |
62e76326 | 1977 | comm_close(fd); |
1978 | } | |
d723bf6b | 1979 | } |
1980 | } | |
1b3db6d9 | 1981 | |
2d8c0b1a | 1982 | static bool |
a50bfe93 | 1983 | AlreadyTimedOut(fde *F) { |
2d8c0b1a | 1984 | if (!F->flags.open) |
1985 | return true; | |
1986 | ||
1987 | if (F->timeout == 0) | |
1988 | return true; | |
1989 | ||
1990 | if (F->timeout > squid_curtime) | |
1991 | return true; | |
1992 | ||
1993 | return false; | |
1994 | } | |
1995 | ||
1b3db6d9 | 1996 | void |
a50bfe93 | 1997 | checkTimeouts(void) { |
1b3db6d9 | 1998 | int fd; |
1999 | fde *F = NULL; | |
2000 | PF *callback; | |
62e76326 | 2001 | |
1b3db6d9 | 2002 | for (fd = 0; fd <= Biggest_FD; fd++) { |
62e76326 | 2003 | F = &fd_table[fd]; |
2004 | ||
2d8c0b1a | 2005 | if (AlreadyTimedOut(F)) |
62e76326 | 2006 | continue; |
2007 | ||
bf8fe701 | 2008 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 2009 | |
2010 | if (F->timeout_handler) { | |
bf8fe701 | 2011 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
62e76326 | 2012 | callback = F->timeout_handler; |
2013 | F->timeout_handler = NULL; | |
2014 | callback(fd, F->timeout_data); | |
2015 | } else { | |
bf8fe701 | 2016 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 2017 | comm_close(fd); |
2018 | } | |
b5443c04 | 2019 | } |
2020 | } | |
2021 | ||
c4b7a5a9 | 2022 | /* |
2023 | * New-style listen and accept routines | |
2024 | * | |
2025 | * Listen simply registers our interest in an FD for listening, | |
2026 | * and accept takes a callback to call when an FD has been | |
2027 | * accept()ed. | |
2028 | */ | |
2029 | int | |
a50bfe93 | 2030 | comm_listen(int sock) { |
c4b7a5a9 | 2031 | int x; |
62e76326 | 2032 | |
c4b7a5a9 | 2033 | if ((x = listen(sock, Squid_MaxFD >> 2)) < 0) { |
bf8fe701 | 2034 | debugs(50, 0, "comm_listen: listen(" << (Squid_MaxFD >> 2) << ", " << sock << "): " << xstrerror()); |
62e76326 | 2035 | return x; |
c4b7a5a9 | 2036 | } |
62e76326 | 2037 | |
c4b7a5a9 | 2038 | return sock; |
2039 | } | |
2040 | ||
2d8c0b1a | 2041 | void |
a50bfe93 | 2042 | fdc_t::beginAccepting() { |
2d8c0b1a | 2043 | accept.accept.beginAccepting(); |
2044 | } | |
c4b7a5a9 | 2045 | |
2d8c0b1a | 2046 | int |
a50bfe93 | 2047 | fdc_t::acceptCount() const { |
2d8c0b1a | 2048 | return accept.accept.acceptCount(); |
2049 | } | |
62e76326 | 2050 | |
2d8c0b1a | 2051 | void |
a50bfe93 | 2052 | fdc_t::acceptOne(int fd) { |
c99de607 | 2053 | // If there is no callback and we accept, we will leak the accepted FD. |
2054 | // When we are running out of FDs, there is often no callback. | |
2055 | if (!accept.accept.callback.handler) { | |
bf8fe701 | 2056 | debugs(5, 5, "fdc_t::acceptOne orphaned: FD " << fd); |
c99de607 | 2057 | // XXX: can we remove this and similar "just in case" calls and |
2058 | // either listen always or listen only when there is a callback? | |
2059 | if (!AcceptLimiter::Instance().deferring()) | |
2060 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
2061 | accept.accept.finished(true); | |
2062 | return; | |
2063 | } | |
2064 | ||
bdd8c442 | 2065 | /* |
2066 | * We don't worry about running low on FDs here. Instead, | |
2067 | * httpAccept() will use AcceptLimiter if we reach the limit | |
2068 | * there. | |
2069 | */ | |
62e76326 | 2070 | |
2d8c0b1a | 2071 | /* Accept a new connection */ |
2072 | int newfd = comm_old_accept(fd, accept.connDetails); | |
62e76326 | 2073 | |
2d8c0b1a | 2074 | /* Check for errors */ |
bdd8c442 | 2075 | |
2d8c0b1a | 2076 | if (newfd < 0) { |
2077 | if (newfd == COMM_NOMESSAGE) { | |
2078 | /* register interest again */ | |
bf8fe701 | 2079 | debugs(5, 5, "fdc_t::acceptOne eof: FD " << fd << " handler: " << (void*)accept.accept.callback.handler); |
2d8c0b1a | 2080 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); |
2081 | accept.accept.finished(true); | |
62e76326 | 2082 | return; |
2083 | } | |
2084 | ||
2d8c0b1a | 2085 | /* A non-recoverable error - register an error callback */ |
2086 | new CommAcceptCallbackData(fd, accept.accept.callback, COMM_ERROR, errno, -1, accept.connDetails); | |
62e76326 | 2087 | |
2d8c0b1a | 2088 | accept.accept.callback = CallBack<IOACB>(); |
62e76326 | 2089 | |
2d8c0b1a | 2090 | accept.accept.finished(true); |
62e76326 | 2091 | |
2d8c0b1a | 2092 | return; |
2093 | } | |
62e76326 | 2094 | |
bf8fe701 | 2095 | debugs(5, 5, "fdc_t::acceptOne accepted: FD " << fd << " handler: " << (void*)accept.accept.callback.handler << " newfd: " << newfd); |
c99de607 | 2096 | |
2097 | assert(accept.accept.callback.handler); | |
2d8c0b1a | 2098 | accept.accept.doCallback(fd, newfd, COMM_OK, 0, &accept.connDetails); |
62e76326 | 2099 | |
2d8c0b1a | 2100 | /* If we weren't re-registed, don't bother trying again! */ |
62e76326 | 2101 | |
2d8c0b1a | 2102 | if (accept.accept.callback.handler == NULL) |
2103 | accept.accept.finished(true); | |
2104 | } | |
62e76326 | 2105 | |
2d8c0b1a | 2106 | bool |
a50bfe93 | 2107 | AcceptFD::finished() const { |
2d8c0b1a | 2108 | return finished_; |
2109 | } | |
62e76326 | 2110 | |
2d8c0b1a | 2111 | void |
a50bfe93 | 2112 | AcceptFD::finished(bool newValue) { |
2d8c0b1a | 2113 | finished_ = newValue; |
2114 | } | |
62e76326 | 2115 | |
2d8c0b1a | 2116 | bool |
a50bfe93 | 2117 | AcceptFD::finishedAccepting() const { |
2d8c0b1a | 2118 | return acceptCount() >= MAX_ACCEPT_PER_LOOP || finished(); |
c4b7a5a9 | 2119 | } |
2120 | ||
2d8c0b1a | 2121 | /* |
2122 | * This callback is called whenever a filedescriptor is ready | |
2123 | * to dupe itself and fob off an accept()ed connection | |
2124 | */ | |
2125 | static void | |
a50bfe93 | 2126 | comm_accept_try(int fd, void *data) { |
2d8c0b1a | 2127 | assert(fdc_table[fd].active == 1); |
2128 | ||
2129 | fdc_table[fd].beginAccepting(); | |
2130 | ||
2131 | while (!fdc_table[fd].accept.accept.finishedAccepting()) | |
2132 | fdc_table[fd].acceptOne(fd); | |
2133 | } | |
c4b7a5a9 | 2134 | |
2135 | /* | |
2136 | * Notes: | |
2137 | * + the current interface will queue _one_ accept per io loop. | |
2138 | * this isn't very optimal and should be revisited at a later date. | |
2139 | */ | |
2140 | void | |
a50bfe93 | 2141 | comm_accept(int fd, IOACB *handler, void *handler_data) { |
bf8fe701 | 2142 | debugs(5, 5, "comm_accept: FD " << fd << " handler: " << (void*)handler); |
05589f93 | 2143 | requireOpenAndActive(fd); |
c4b7a5a9 | 2144 | |
62e76326 | 2145 | /* make sure we're not pending! */ |
2d8c0b1a | 2146 | assert(fdc_table[fd].accept.accept.callback.handler == NULL); |
c4b7a5a9 | 2147 | |
62e76326 | 2148 | /* Record our details */ |
d242ad41 | 2149 | fdc_table[fd].accept.accept.callback = CallBack<IOACB> (handler, handler_data); |
c4b7a5a9 | 2150 | |
62e76326 | 2151 | /* Kick off the accept */ |
c4b7a5a9 | 2152 | #if OPTIMISTIC_IO |
62e76326 | 2153 | |
2154 | comm_accept_try(fd, NULL); | |
c4b7a5a9 | 2155 | #else |
62e76326 | 2156 | |
2157 | commSetSelect(fd, COMM_SELECT_READ, comm_accept_try, NULL, 0); | |
c4b7a5a9 | 2158 | #endif |
2159 | } | |
6cce2334 | 2160 | |
a50bfe93 | 2161 | void CommIO::Initialise() { |
6cce2334 | 2162 | /* Initialize done pipe signal */ |
2163 | int DonePipe[2]; | |
2164 | pipe(DonePipe); | |
2165 | DoneFD = DonePipe[1]; | |
2166 | DoneReadFD = DonePipe[0]; | |
d06925a4 | 2167 | fd_open(DoneReadFD, FD_PIPE, "async-io completetion event: main"); |
2168 | fd_open(DoneFD, FD_PIPE, "async-io completetion event: threads"); | |
2169 | commSetNonBlocking(DoneReadFD); | |
2170 | commSetNonBlocking(DoneFD); | |
2171 | commSetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
6cce2334 | 2172 | Initialised = true; |
2173 | } | |
2174 | ||
d06925a4 | 2175 | void CommIO::NotifyIOClose() { |
2176 | /* Close done pipe signal */ | |
2177 | FlushPipe(); | |
2178 | close(DoneFD); | |
2179 | close(DoneReadFD); | |
2180 | fd_close(DoneFD); | |
2181 | fd_close(DoneReadFD); | |
2182 | Initialised = false; | |
2183 | } | |
2184 | ||
6cce2334 | 2185 | bool CommIO::Initialised = false; |
2186 | bool CommIO::DoneSignalled = false; | |
2187 | int CommIO::DoneFD = -1; | |
2188 | int CommIO::DoneReadFD = -1; | |
2189 | ||
2190 | void | |
a50bfe93 | 2191 | CommIO::FlushPipe() { |
6cce2334 | 2192 | char buf[256]; |
56410c89 | 2193 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); |
6cce2334 | 2194 | } |
2195 | ||
2196 | void | |
a50bfe93 | 2197 | CommIO::NULLFDHandler(int fd, void *data) { |
6cce2334 | 2198 | FlushPipe(); |
2199 | commSetSelect(fd, COMM_SELECT_READ, NULLFDHandler, NULL, 0); | |
2200 | } | |
2201 | ||
2202 | void | |
a50bfe93 | 2203 | CommIO::ResetNotifications() { |
6cce2334 | 2204 | if (DoneSignalled) { |
62e76326 | 2205 | FlushPipe(); |
2206 | DoneSignalled = false; | |
6cce2334 | 2207 | } |
2208 | } | |
a46d2c0e | 2209 | |
2210 | AcceptLimiter AcceptLimiter::Instance_; | |
2211 | ||
a50bfe93 | 2212 | AcceptLimiter &AcceptLimiter::Instance() { |
a46d2c0e | 2213 | return Instance_; |
2214 | } | |
2215 | ||
c99de607 | 2216 | bool |
2217 | AcceptLimiter::deferring() const { | |
2218 | return deferred.size() > 0; | |
2219 | } | |
2220 | ||
a46d2c0e | 2221 | void |
a50bfe93 | 2222 | AcceptLimiter::defer (int fd, Acceptor::AcceptorFunction *aFunc, void *data) { |
bf8fe701 | 2223 | debugs(5, 5, "AcceptLimiter::defer: FD " << fd << " handler: " << (void*)aFunc); |
a46d2c0e | 2224 | Acceptor temp; |
2225 | temp.theFunction = aFunc; | |
2226 | temp.acceptFD = fd; | |
2227 | temp.theData = data; | |
2228 | deferred.push_back(temp); | |
2229 | } | |
2230 | ||
2231 | void | |
a50bfe93 | 2232 | AcceptLimiter::kick() { |
c99de607 | 2233 | if (!deferring()) |
a46d2c0e | 2234 | return; |
2235 | ||
2236 | /* Yes, this means the first on is the last off.... | |
2237 | * If the list container was a little more friendly, we could sensibly us it. | |
2238 | */ | |
2239 | Acceptor temp = deferred.pop_back(); | |
2240 | ||
2241 | comm_accept (temp.acceptFD, temp.theFunction, temp.theData); | |
2242 | } | |
2243 | ||
2244 | void | |
a50bfe93 | 2245 | commMarkHalfClosed(int fd) { |
a46d2c0e | 2246 | assert (fdc_table[fd].active && !fdc_table[fd].half_closed); |
2247 | AbortChecker::Instance().monitor(fd); | |
2248 | fdc_table[fd].half_closed = true; | |
2249 | } | |
2250 | ||
f900210a | 2251 | int commIsHalfClosed(int fd) { |
e85e41a2 | 2252 | assert (fdc_table[fd].active); |
f900210a | 2253 | |
2254 | return fdc_table[fd].half_closed; | |
2255 | } | |
2256 | ||
2257 | void | |
2258 | commCheckHalfClosed(void *data) { | |
2259 | AbortChecker::Instance().doIOLoop(); | |
2260 | eventAdd("commCheckHalfClosed", commCheckHalfClosed, NULL, 1.0, false); | |
2261 | } | |
2262 | ||
a46d2c0e | 2263 | AbortChecker &AbortChecker::Instance() {return Instance_;} |
2264 | ||
2265 | AbortChecker AbortChecker::Instance_; | |
2266 | ||
2267 | void | |
a50bfe93 | 2268 | AbortChecker::AbortCheckReader(int fd, char *, size_t size, comm_err_t flag, int xerrno, void *data) { |
a46d2c0e | 2269 | assert (size == 0); |
2270 | /* sketch: | |
2271 | * if the read is ok and 0, the conn is still open. | |
2272 | * if the read is a fail, close the conn | |
2273 | */ | |
2274 | ||
2275 | if (flag != COMM_OK && flag != COMM_ERR_CLOSING) { | |
bf8fe701 | 2276 | debugs(5, 3, "AbortChecker::AbortCheckReader: FD " << fd << " aborted"); |
a46d2c0e | 2277 | comm_close(fd); |
2278 | } | |
2279 | } | |
2280 | ||
2281 | void | |
a50bfe93 | 2282 | AbortChecker::monitor(int fd) { |
a46d2c0e | 2283 | assert (!contains(fd)); |
2284 | ||
2285 | add | |
2286 | (fd); | |
2287 | ||
bf8fe701 | 2288 | debugs(5, 3, "AbortChecker::monitor: monitoring half closed FD " << fd << " for aborts"); |
a46d2c0e | 2289 | } |
2290 | ||
2291 | void | |
a50bfe93 | 2292 | AbortChecker::stopMonitoring (int fd) { |
a46d2c0e | 2293 | assert (contains (fd)); |
2294 | ||
2295 | remove | |
2296 | (fd); | |
2297 | ||
bf8fe701 | 2298 | debugs(5, 3, "AbortChecker::stopMonitoring: stopped monitoring half closed FD " << fd << " for aborts"); |
a46d2c0e | 2299 | } |
2300 | ||
2301 | #include "splay.h" | |
2302 | void | |
a50bfe93 | 2303 | AbortChecker::doIOLoop() { |
f900210a | 2304 | fds->walk(RemoveCheck, this); |
a46d2c0e | 2305 | fds->walk(AddCheck, this); |
a46d2c0e | 2306 | } |
2307 | ||
2308 | void | |
a50bfe93 | 2309 | AbortChecker::AddCheck (int const &fd, void *data) { |
a46d2c0e | 2310 | AbortChecker *me = (AbortChecker *)data; |
2311 | me->addCheck(fd); | |
2312 | } | |
2313 | ||
2314 | void | |
a50bfe93 | 2315 | AbortChecker::RemoveCheck (int const &fd, void *data) { |
a46d2c0e | 2316 | AbortChecker *me = (AbortChecker *)data; |
2317 | me->removeCheck(fd); | |
2318 | } | |
2319 | ||
2320 | ||
2321 | int | |
a50bfe93 | 2322 | AbortChecker::IntCompare (int const &lhs, int const &rhs) { |
a46d2c0e | 2323 | return lhs - rhs; |
2324 | } | |
2325 | ||
2326 | bool | |
a50bfe93 | 2327 | AbortChecker::contains (int const fd) const { |
a46d2c0e | 2328 | fds = fds->splay(fd, IntCompare); |
2329 | ||
2330 | if (splayLastResult != 0) | |
2331 | return false; | |
2332 | ||
2333 | return true; | |
2334 | } | |
2335 | ||
2336 | void | |
2337 | ||
2338 | AbortChecker::remove | |
a50bfe93 | 2339 | (int const fd) { |
a46d2c0e | 2340 | |
2341 | fds = fds->remove | |
2342 | (fd, IntCompare); | |
2343 | } | |
2344 | ||
2345 | void | |
2346 | ||
2347 | AbortChecker::add | |
a50bfe93 | 2348 | (int const fd) { |
a46d2c0e | 2349 | fds = fds->insert (fd, IntCompare); |
2350 | } | |
2351 | ||
2352 | void | |
a50bfe93 | 2353 | AbortChecker::addCheck (int const fd) { |
a46d2c0e | 2354 | /* assert comm_is_open (fd); */ |
2355 | comm_read(fd, NULL, 0, AbortCheckReader, NULL); | |
2356 | } | |
2357 | ||
2358 | void | |
a50bfe93 | 2359 | AbortChecker::removeCheck (int const fd) { |
a46d2c0e | 2360 | /* |
2361 | comm_read_cancel(fd, AbortCheckReader, NULL); | |
2362 | */ | |
2363 | } | |
2364 | ||
a50bfe93 | 2365 | CommRead::CommRead() : fd(-1), buf(NULL), len(0) {} |
a46d2c0e | 2366 | |
2367 | CommRead::CommRead(int fd_, char *buf_, int len_, IOCB *handler_, void *data_) | |
a50bfe93 | 2368 | : fd(fd_), buf(buf_), len(len_), callback(handler_, data_) {} |
a46d2c0e | 2369 | |
a50bfe93 | 2370 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 2371 | |
a50bfe93 | 2372 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 2373 | |
a50bfe93 | 2374 | DeferredReadManager::~DeferredReadManager() { |
a46d2c0e | 2375 | flushReads(); |
2376 | assert (deferredReads.empty()); | |
2377 | } | |
2378 | ||
97427e90 | 2379 | /* explicit instantiation required for some systems */ |
2380 | ||
2381 | template cbdata_type List<DeferredRead> | |
2382 | ::CBDATA_List; | |
2383 | ||
a46d2c0e | 2384 | void |
a50bfe93 | 2385 | DeferredReadManager::delayRead(DeferredRead const &aRead) { |
bf8fe701 | 2386 | debugs(5, 3, "Adding deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2387 | List<DeferredRead> *temp = deferredReads.push_back(aRead); |
2388 | comm_add_close_handler (aRead.theRead.fd, CloseHandler, temp); | |
2389 | } | |
2390 | ||
2391 | void | |
a50bfe93 | 2392 | DeferredReadManager::CloseHandler(int fd, void *thecbdata) { |
a46d2c0e | 2393 | if (!cbdataReferenceValid (thecbdata)) |
2394 | return; | |
2395 | ||
2396 | List<DeferredRead> *temp = (List<DeferredRead> *)thecbdata; | |
2397 | ||
2398 | temp->element.markCancelled(); | |
2399 | } | |
2400 | ||
2401 | DeferredRead | |
a50bfe93 | 2402 | DeferredReadManager::popHead(ListContainer<DeferredRead> &deferredReads) { |
a46d2c0e | 2403 | assert (!deferredReads.empty()); |
2404 | ||
2405 | if (!deferredReads.head->element.cancelled) | |
2406 | comm_remove_close_handler(deferredReads.head->element.theRead.fd, CloseHandler, deferredReads.head); | |
2407 | ||
2408 | DeferredRead result = deferredReads.pop_front(); | |
2409 | ||
2410 | return result; | |
2411 | } | |
2412 | ||
2413 | void | |
a50bfe93 | 2414 | DeferredReadManager::kickReads(int const count) { |
a46d2c0e | 2415 | /* if we had List::size() we could consolidate this and flushReads */ |
2416 | ||
33cea91c | 2417 | if (count < 1) { |
a46d2c0e | 2418 | flushReads(); |
33cea91c | 2419 | return; |
2420 | } | |
a46d2c0e | 2421 | |
2422 | size_t remaining = count; | |
2423 | ||
2424 | while (!deferredReads.empty() && remaining) { | |
2425 | DeferredRead aRead = popHead(deferredReads); | |
2426 | kickARead(aRead); | |
2427 | ||
2428 | if (!aRead.cancelled) | |
2429 | --remaining; | |
2430 | } | |
2431 | } | |
2432 | ||
2433 | void | |
a50bfe93 | 2434 | DeferredReadManager::flushReads() { |
a46d2c0e | 2435 | ListContainer<DeferredRead> reads; |
2436 | reads = deferredReads; | |
2437 | deferredReads = ListContainer<DeferredRead>(); | |
2438 | ||
2439 | while (!reads.empty()) { | |
2440 | DeferredRead aRead = popHead(reads); | |
2441 | kickARead(aRead); | |
2442 | } | |
2443 | } | |
2444 | ||
2445 | void | |
a50bfe93 | 2446 | DeferredReadManager::kickARead(DeferredRead const &aRead) { |
a46d2c0e | 2447 | if (aRead.cancelled) |
2448 | return; | |
2449 | ||
bf8fe701 | 2450 | debugs(5, 3, "Kicking deferred read on FD " << aRead.theRead.fd); |
a46d2c0e | 2451 | |
2452 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2453 | } | |
2454 | ||
2455 | void | |
a50bfe93 | 2456 | DeferredRead::markCancelled() { |
a46d2c0e | 2457 | cancelled = true; |
2458 | } | |
2d8c0b1a | 2459 | |
a50bfe93 | 2460 | ConnectionDetail::ConnectionDetail() { |
04830959 | 2461 | memset(&me, 0, sizeof(me)); |
2462 | memset(&peer, 0, sizeof(peer)); | |
2d8c0b1a | 2463 | } |
8ff3fa2e | 2464 | |
2465 | bool | |
2466 | CommDispatcher::dispatch() { | |
2467 | bool result = comm_iocallbackpending(); | |
2468 | comm_calliocallback(); | |
2469 | /* and again to deal with indirectly queued events | |
2470 | * resulting from the first call. These are usually | |
2471 | * callbacks and should be dealt with immediately. | |
2472 | */ | |
2473 | comm_calliocallback(); | |
2b663917 | 2474 | |
2475 | /* Adrian's *new* stuff */ | |
2476 | commio_call_callbacks(); | |
8ff3fa2e | 2477 | return result; |
2478 | } | |
2479 | ||
2480 | int | |
2481 | CommSelectEngine::checkEvents(int timeout) { | |
fa3f745b | 2482 | static time_t last_timeout = 0; |
2483 | ||
2484 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2485 | if (squid_curtime > last_timeout) { | |
2486 | last_timeout = squid_curtime; | |
2487 | checkTimeouts(); | |
2488 | } | |
2489 | ||
8ff3fa2e | 2490 | switch (comm_select(timeout)) { |
2491 | ||
2492 | case COMM_OK: | |
2493 | ||
2494 | case COMM_TIMEOUT: | |
2495 | return 0; | |
2496 | ||
2497 | case COMM_IDLE: | |
2498 | ||
2499 | case COMM_SHUTDOWN: | |
2500 | return EVENT_IDLE; | |
2501 | ||
2502 | case COMM_ERROR: | |
2503 | return EVENT_ERROR; | |
2504 | ||
2505 | default: | |
2506 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2507 | return EVENT_ERROR; | |
2508 | }; | |
2509 | } |