]>
Commit | Line | Data |
---|---|---|
30a4f2a8 | 1 | /* |
b510f3a1 | 2 | * DEBUG: section 05 Socket Functions |
30a4f2a8 | 3 | * AUTHOR: Harvest Derived |
4 | * | |
2b6662ba | 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 6 | * ---------------------------------------------------------- |
30a4f2a8 | 7 | * |
2b6662ba | 8 | * Squid is the result of efforts by numerous individuals from |
9 | * the Internet community; see the CONTRIBUTORS file for full | |
10 | * details. Many organizations have provided support for Squid's | |
11 | * development; see the SPONSORS file for full details. Squid is | |
12 | * Copyrighted (C) 2001 by the Regents of the University of | |
13 | * California; see the COPYRIGHT file for full details. Squid | |
14 | * incorporates software developed and/or copyrighted by other | |
15 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 16 | * |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or | |
20 | * (at your option) any later version. | |
9e008dda | 21 | * |
30a4f2a8 | 22 | * This program is distributed in the hope that it will be useful, |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
9e008dda | 26 | * |
30a4f2a8 | 27 | * You should have received a copy of the GNU General Public License |
28 | * along with this program; if not, write to the Free Software | |
cbdec147 | 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 30 | * |
2d8c0b1a | 31 | * |
32 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
30a4f2a8 | 33 | */ |
090089c4 | 34 | |
582c2af2 | 35 | #include "squid.h" |
cfd66529 | 36 | #include "base/AsyncCall.h" |
c4b7a5a9 | 37 | #include "comm.h" |
582c2af2 FC |
38 | #include "ClientInfo.h" |
39 | #include "CommCalls.h" | |
04f55905 AJ |
40 | #include "comm/AcceptLimiter.h" |
41 | #include "comm/comm_internal.h" | |
cfd66529 | 42 | #include "comm/Connection.h" |
ec41b64c | 43 | #include "comm/IoCallback.h" |
d841c88d | 44 | #include "comm/Loops.h" |
ec41b64c | 45 | #include "comm/Write.h" |
cbff89ba | 46 | #include "comm/TcpAcceptor.h" |
a553a5a3 | 47 | #include "CommRead.h" |
582c2af2 | 48 | #include "compat/cmsg.h" |
74257126 | 49 | #include "DescriptorSet.h" |
582c2af2 | 50 | #include "event.h" |
fc54b8d2 | 51 | #include "fd.h" |
582c2af2 FC |
52 | #include "fde.h" |
53 | #include "globals.h" | |
9b5c4a9a | 54 | #include "icmp/net_db.h" |
96d89ea0 HN |
55 | #include "ip/Address.h" |
56 | #include "ip/Intercept.h" | |
425de4c8 | 57 | #include "ip/QosConfig.h" |
055421ee | 58 | #include "ip/tools.h" |
582c2af2 FC |
59 | #include "MemBuf.h" |
60 | #include "pconn.h" | |
61 | #include "protos.h" | |
62 | #include "profiler/Profiler.h" | |
63 | #include "SquidTime.h" | |
e4f1fdae | 64 | #include "StatCounters.h" |
582c2af2 | 65 | #include "StoreIOBuffer.h" |
4db984be CT |
66 | #if USE_SSL |
67 | #include "ssl/support.h" | |
68 | #endif | |
090089c4 | 69 | |
b4cd430a | 70 | #include "cbdata.h" |
be266cb2 | 71 | #if _SQUID_CYGWIN_ |
b671cc68 | 72 | #include <sys/ioctl.h> |
73 | #endif | |
30a4f2a8 | 74 | #ifdef HAVE_NETINET_TCP_H |
75 | #include <netinet/tcp.h> | |
76 | #endif | |
582c2af2 FC |
77 | #if HAVE_SYS_UN_H |
78 | #include <sys/un.h> | |
79 | #endif | |
80 | #if HAVE_MATH_H | |
81 | #include <math.h> | |
82 | #endif | |
21d845b1 FC |
83 | #if HAVE_ERRNO_H |
84 | #include <errno.h> | |
85 | #endif | |
090089c4 | 86 | |
2b663917 | 87 | /* |
88 | * New C-like simple comm code. This stuff is a mess and doesn't really buy us anything. | |
89 | */ | |
90 | ||
82ec8dfc AR |
91 | static void commStopHalfClosedMonitor(int fd); |
92 | static IOCB commHalfClosedReader; | |
9c8a6c3b | 93 | static void comm_init_opened(const Comm::ConnectionPointer &conn, tos_t tos, nfmark_t nfmark, const char *note, struct addrinfo *AI); |
a67d2b2e | 94 | static int comm_apply_flags(int new_socket, Ip::Address &addr, int flags, struct addrinfo *AI); |
82ec8dfc | 95 | |
9a0a18de | 96 | #if USE_DELAY_POOLS |
b4cd430a CT |
97 | CBDATA_CLASS_INIT(CommQuotaQueue); |
98 | ||
99 | static void commHandleWriteHelper(void * data); | |
100 | #endif | |
101 | ||
090089c4 | 102 | /* STATIC */ |
62e76326 | 103 | |
74257126 AR |
104 | static DescriptorSet *TheHalfClosed = NULL; /// the set of half-closed FDs |
105 | static bool WillCheckHalfClosed = false; /// true if check is scheduled | |
106 | static EVH commHalfClosedCheck; | |
107 | static void commPlanHalfClosedCheck(); | |
108 | ||
cc192b50 | 109 | static comm_err_t commBind(int s, struct addrinfo &); |
f5b8bbc4 | 110 | static void commSetReuseAddr(int); |
111 | static void commSetNoLinger(int); | |
30a4f2a8 | 112 | #ifdef TCP_NODELAY |
f5b8bbc4 | 113 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 114 | #endif |
f5b8bbc4 | 115 | static void commSetTcpRcvbuf(int, int); |
723123a9 | 116 | |
b001e822 | 117 | static MemAllocator *conn_close_pool = NULL; |
c4b7a5a9 | 118 | fd_debug_t *fdd_table = NULL; |
62e76326 | 119 | |
04f55905 | 120 | bool |
b0469965 | 121 | isOpen(const int fd) |
b300c36d | 122 | { |
9a5ac93d | 123 | return fd >= 0 && fd_table && fd_table[fd].flags.open != 0; |
b300c36d | 124 | } |
125 | ||
e1a88700 | 126 | /** |
c4b7a5a9 | 127 | * Attempt a read |
128 | * | |
129 | * If the read attempt succeeds or fails, call the callback. | |
130 | * Else, wait for another IO notification. | |
131 | */ | |
2d8c0b1a | 132 | void |
2b663917 | 133 | commHandleRead(int fd, void *data) |
2d8c0b1a | 134 | { |
ec41b64c | 135 | Comm::IoCallback *ccb = (Comm::IoCallback *) data; |
9e008dda | 136 | |
2b663917 | 137 | assert(data == COMMIO_FD_READCB(fd)); |
ec41b64c | 138 | assert(ccb->active()); |
62e76326 | 139 | /* Attempt a read */ |
95dc7ff4 | 140 | ++ statCounter.syscalls.sock.reads; |
62e76326 | 141 | errno = 0; |
2d8c0b1a | 142 | int retval; |
2b663917 | 143 | retval = FD_READ_METHOD(fd, ccb->buf, ccb->size); |
bf8fe701 | 144 | debugs(5, 3, "comm_read_try: FD " << fd << ", size " << ccb->size << ", retval " << retval << ", errno " << errno); |
62e76326 | 145 | |
146 | if (retval < 0 && !ignoreErrno(errno)) { | |
bf8fe701 | 147 | debugs(5, 3, "comm_read_try: scheduling COMM_ERROR"); |
9e008dda | 148 | ccb->offset = 0; |
ec41b64c | 149 | ccb->finish(COMM_ERROR, errno); |
62e76326 | 150 | return; |
151 | }; | |
152 | ||
153 | /* See if we read anything */ | |
154 | /* Note - read 0 == socket EOF, which is a valid read */ | |
155 | if (retval >= 0) { | |
156 | fd_bytes(fd, retval, FD_READ); | |
9e008dda | 157 | ccb->offset = retval; |
ec41b64c | 158 | ccb->finish(COMM_OK, errno); |
62e76326 | 159 | return; |
160 | } | |
c4b7a5a9 | 161 | |
62e76326 | 162 | /* Nope, register for some more IO */ |
d841c88d | 163 | Comm::SetSelect(fd, COMM_SELECT_READ, commHandleRead, data, 0); |
c4b7a5a9 | 164 | } |
165 | ||
abd8f140 AJ |
166 | /** |
167 | * Queue a read. handler/handler_data are called when the read | |
168 | * completes, on error, or on file descriptor close. | |
169 | */ | |
b0469965 | 170 | void |
ec20038e | 171 | comm_read(const Comm::ConnectionPointer &conn, char *buf, int size, AsyncCall::Pointer &callback) |
c4b7a5a9 | 172 | { |
ec20038e | 173 | debugs(5, 5, "comm_read, queueing read for " << conn << "; asynCall " << callback); |
c4b7a5a9 | 174 | |
82ec8dfc | 175 | /* Make sure we are open and not closing */ |
ec20038e AJ |
176 | assert(Comm::IsConnOpen(conn)); |
177 | assert(!fd_table[conn->fd].closing()); | |
b0388924 | 178 | Comm::IoCallback *ccb = COMMIO_FD_READCB(conn->fd); |
82ec8dfc AR |
179 | |
180 | // Make sure we are either not reading or just passively monitoring. | |
181 | // Active/passive conflicts are OK and simply cancel passive monitoring. | |
182 | if (ccb->active()) { | |
183 | // if the assertion below fails, we have an active comm_read conflict | |
ec20038e AJ |
184 | assert(fd_table[conn->fd].halfClosedReader != NULL); |
185 | commStopHalfClosedMonitor(conn->fd); | |
82ec8dfc AR |
186 | assert(!ccb->active()); |
187 | } | |
b0388924 | 188 | ccb->conn = conn; |
528b2c61 | 189 | |
2b663917 | 190 | /* Queue the read */ |
ec41b64c | 191 | ccb->setCallback(Comm::IOCB_READ, callback, (char *)buf, NULL, size); |
8bbb16e3 | 192 | Comm::SetSelect(conn->fd, COMM_SELECT_READ, commHandleRead, ccb, 0); |
c4b7a5a9 | 193 | } |
194 | ||
e1a88700 | 195 | /** |
c4b7a5a9 | 196 | * Empty the read buffers |
197 | * | |
198 | * This is a magical routine that empties the read buffers. | |
199 | * Under some platforms (Linux) if a buffer has data in it before | |
200 | * you call close(), the socket will hang and take quite a while | |
201 | * to timeout. | |
202 | */ | |
203 | static void | |
204 | comm_empty_os_read_buffers(int fd) | |
205 | { | |
1191b93b | 206 | #if _SQUID_LINUX_ |
c4b7a5a9 | 207 | /* prevent those nasty RST packets */ |
208 | char buf[SQUID_TCP_SO_RCVBUF]; | |
62e76326 | 209 | |
cc192b50 | 210 | if (fd_table[fd].flags.nonblocking == 1) { |
211 | while (FD_READ_METHOD(fd, buf, SQUID_TCP_SO_RCVBUF) > 0) {}; | |
212 | } | |
c4b7a5a9 | 213 | #endif |
214 | } | |
215 | ||
e1a88700 | 216 | /** |
2b663917 | 217 | * Return whether the FD has a pending completed callback. |
e884bbde | 218 | * NP: does not work. |
c4b7a5a9 | 219 | */ |
220 | int | |
221 | comm_has_pending_read_callback(int fd) | |
222 | { | |
b0469965 | 223 | assert(isOpen(fd)); |
224 | // XXX: We do not know whether there is a read callback scheduled. | |
225 | // This is used for pconn management that should probably be more | |
226 | // tightly integrated into comm to minimize the chance that a | |
227 | // closing pconn socket will be used for a new transaction. | |
545d554b | 228 | return false; |
c4b7a5a9 | 229 | } |
230 | ||
b0469965 | 231 | // Does comm check this fd for read readiness? |
232 | // Note that when comm is not monitoring, there can be a pending callback | |
233 | // call, which may resume comm monitoring once fired. | |
528b2c61 | 234 | bool |
b0469965 | 235 | comm_monitors_read(int fd) |
c4b7a5a9 | 236 | { |
b0469965 | 237 | assert(isOpen(fd)); |
238 | // Being active is usually the same as monitoring because we always | |
ec41b64c AJ |
239 | // start monitoring the FD when we configure Comm::IoCallback for I/O |
240 | // and we usually configure Comm::IoCallback for I/O when we starting | |
241 | // monitoring a FD for reading. | |
b0469965 | 242 | return COMMIO_FD_READCB(fd)->active(); |
c4b7a5a9 | 243 | } |
244 | ||
e1a88700 | 245 | /** |
c4b7a5a9 | 246 | * Cancel a pending read. Assert that we have the right parameters, |
247 | * and that there are no pending read events! | |
2b663917 | 248 | * |
b0469965 | 249 | * XXX: We do not assert that there are no pending read events and |
250 | * with async calls it becomes even more difficult. | |
251 | * The whole interface should be reworked to do callback->cancel() | |
252 | * instead of searching for places where the callback may be stored and | |
253 | * updating the state of those places. | |
254 | * | |
2b663917 | 255 | * AHC Don't call the comm handlers? |
c4b7a5a9 | 256 | */ |
257 | void | |
258 | comm_read_cancel(int fd, IOCB *callback, void *data) | |
259 | { | |
b0469965 | 260 | if (!isOpen(fd)) { |
261 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
262 | return; | |
9e008dda | 263 | } |
b0469965 | 264 | |
ec41b64c | 265 | Comm::IoCallback *cb = COMMIO_FD_READCB(fd); |
b0469965 | 266 | // TODO: is "active" == "monitors FD"? |
267 | if (!cb->active()) { | |
268 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
269 | return; | |
9e008dda | 270 | } |
b0469965 | 271 | |
272 | typedef CommCbFunPtrCallT<CommIoCbPtrFun> Call; | |
273 | Call *call = dynamic_cast<Call*>(cb->callback.getRaw()); | |
274 | if (!call) { | |
275 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " lacks callback"); | |
276 | return; | |
9e008dda | 277 | } |
b0469965 | 278 | |
82ec8dfc AR |
279 | call->cancel("old comm_read_cancel"); |
280 | ||
b0469965 | 281 | typedef CommIoCbParams Params; |
282 | const Params ¶ms = GetCommParams<Params>(cb->callback); | |
c4b7a5a9 | 283 | |
c4b7a5a9 | 284 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
b0469965 | 285 | assert(call->dialer.handler == callback); |
286 | assert(params.data == data); | |
c4b7a5a9 | 287 | |
288 | /* Delete the callback */ | |
ec41b64c | 289 | cb->cancel("old comm_read_cancel"); |
420f2ac8 | 290 | |
291 | /* And the IO event */ | |
d841c88d | 292 | Comm::SetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 293 | } |
294 | ||
c4b7a5a9 | 295 | void |
b0469965 | 296 | comm_read_cancel(int fd, AsyncCall::Pointer &callback) |
c4b7a5a9 | 297 | { |
b0469965 | 298 | callback->cancel("comm_read_cancel"); |
9e008dda | 299 | |
b0469965 | 300 | if (!isOpen(fd)) { |
301 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " closed"); | |
302 | return; | |
303 | } | |
304 | ||
ec41b64c | 305 | Comm::IoCallback *cb = COMMIO_FD_READCB(fd); |
b0469965 | 306 | |
307 | if (!cb->active()) { | |
308 | debugs(5, 4, "comm_read_cancel fails: FD " << fd << " inactive"); | |
309 | return; | |
310 | } | |
311 | ||
312 | AsyncCall::Pointer call = cb->callback; | |
82ec8dfc | 313 | assert(call != NULL); // XXX: should never fail (active() checks for callback==NULL) |
9e008dda | 314 | |
b0469965 | 315 | /* Ok, we can be reasonably sure we won't lose any data here! */ |
316 | assert(call == callback); | |
c4b7a5a9 | 317 | |
b0469965 | 318 | /* Delete the callback */ |
ec41b64c | 319 | cb->cancel("comm_read_cancel"); |
b0469965 | 320 | |
321 | /* And the IO event */ | |
d841c88d | 322 | Comm::SetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
c4b7a5a9 | 323 | } |
324 | ||
e1a88700 | 325 | /** |
ce767c23 | 326 | * synchronous wrapper around udp socket functions |
327 | */ | |
ce767c23 | 328 | int |
b7ac5457 | 329 | comm_udp_recvfrom(int fd, void *buf, size_t len, int flags, Ip::Address &from) |
ce767c23 | 330 | { |
95dc7ff4 | 331 | ++ statCounter.syscalls.sock.recvfroms; |
cc192b50 | 332 | int x = 0; |
333 | struct addrinfo *AI = NULL; | |
334 | ||
335 | debugs(5,8, "comm_udp_recvfrom: FD " << fd << " from " << from); | |
336 | ||
337 | assert( NULL == AI ); | |
338 | ||
339 | from.InitAddrInfo(AI); | |
340 | ||
341 | x = recvfrom(fd, buf, len, flags, AI->ai_addr, &AI->ai_addrlen); | |
342 | ||
343 | from = *AI; | |
344 | ||
345 | from.FreeAddrInfo(AI); | |
346 | ||
347 | return x; | |
ce767c23 | 348 | } |
349 | ||
365f12a9 | 350 | int |
7d21986b | 351 | comm_udp_recv(int fd, void *buf, size_t len, int flags) |
365f12a9 | 352 | { |
b7ac5457 | 353 | Ip::Address nul; |
cc192b50 | 354 | return comm_udp_recvfrom(fd, buf, len, flags, nul); |
365f12a9 | 355 | } |
356 | ||
f71da12c | 357 | ssize_t |
7d21986b | 358 | comm_udp_send(int s, const void *buf, size_t len, int flags) |
f71da12c | 359 | { |
62e76326 | 360 | return send(s, buf, len, flags); |
f71da12c | 361 | } |
ce767c23 | 362 | |
545d554b | 363 | bool |
364 | comm_has_incomplete_write(int fd) | |
365 | { | |
b0469965 | 366 | assert(isOpen(fd)); |
367 | return COMMIO_FD_WRITECB(fd)->active(); | |
d4cb310b | 368 | } |
369 | ||
e1a88700 | 370 | /** |
cf3c0ee3 | 371 | * Queue a write. handler/handler_data are called when the write fully |
372 | * completes, on error, or on file descriptor close. | |
373 | */ | |
9864ee44 | 374 | |
090089c4 | 375 | /* Return the local port associated with fd. */ |
f45dd259 | 376 | unsigned short |
b8d8561b | 377 | comm_local_port(int fd) |
090089c4 | 378 | { |
b7ac5457 | 379 | Ip::Address temp; |
cc192b50 | 380 | struct addrinfo *addr = NULL; |
76f87348 | 381 | fde *F = &fd_table[fd]; |
090089c4 | 382 | |
090089c4 | 383 | /* If the fd is closed already, just return */ |
62e76326 | 384 | |
60c0b5a2 | 385 | if (!F->flags.open) { |
bf8fe701 | 386 | debugs(5, 0, "comm_local_port: FD " << fd << " has been closed."); |
62e76326 | 387 | return 0; |
090089c4 | 388 | } |
62e76326 | 389 | |
cc192b50 | 390 | if (F->local_addr.GetPort()) |
391 | return F->local_addr.GetPort(); | |
62e76326 | 392 | |
6084c0b6 AJ |
393 | if (F->sock_family == AF_INET) |
394 | temp.SetIPv4(); | |
6084c0b6 | 395 | |
cc192b50 | 396 | temp.InitAddrInfo(addr); |
62e76326 | 397 | |
cc192b50 | 398 | if (getsockname(fd, addr->ai_addr, &(addr->ai_addrlen)) ) { |
e0236918 | 399 | debugs(50, DBG_IMPORTANT, "comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD " << fd << ": " << xstrerror()); |
cc192b50 | 400 | temp.FreeAddrInfo(addr); |
62e76326 | 401 | return 0; |
090089c4 | 402 | } |
cc192b50 | 403 | temp = *addr; |
404 | ||
405 | temp.FreeAddrInfo(addr); | |
406 | ||
3d031c35 AJ |
407 | if (F->local_addr.IsAnyAddr()) { |
408 | /* save the whole local address, not just the port. */ | |
409 | F->local_addr = temp; | |
410 | } else { | |
411 | F->local_addr.SetPort(temp.GetPort()); | |
412 | } | |
62e76326 | 413 | |
6084c0b6 | 414 | debugs(5, 6, "comm_local_port: FD " << fd << ": port " << F->local_addr.GetPort() << "(family=" << F->sock_family << ")"); |
cc192b50 | 415 | return F->local_addr.GetPort(); |
090089c4 | 416 | } |
417 | ||
3d7e9d7c | 418 | static comm_err_t |
cc192b50 | 419 | commBind(int s, struct addrinfo &inaddr) |
090089c4 | 420 | { |
95dc7ff4 | 421 | ++ statCounter.syscalls.sock.binds; |
62e76326 | 422 | |
ac760b5e AJ |
423 | if (bind(s, inaddr.ai_addr, inaddr.ai_addrlen) == 0) { |
424 | debugs(50, 6, "commBind: bind socket FD " << s << " to " << fd_table[s].local_addr); | |
62e76326 | 425 | return COMM_OK; |
ac760b5e | 426 | } |
62e76326 | 427 | |
cc192b50 | 428 | debugs(50, 0, "commBind: Cannot bind socket FD " << s << " to " << fd_table[s].local_addr << ": " << xstrerror()); |
62e76326 | 429 | |
090089c4 | 430 | return COMM_ERROR; |
431 | } | |
432 | ||
e1a88700 | 433 | /** |
434 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
435 | * is OR of flags specified in comm.h. Defaults TOS | |
436 | */ | |
b8d8561b | 437 | int |
16b204c4 | 438 | comm_open(int sock_type, |
62e76326 | 439 | int proto, |
b7ac5457 | 440 | Ip::Address &addr, |
62e76326 | 441 | int flags, |
442 | const char *note) | |
d6827718 | 443 | { |
425de4c8 | 444 | return comm_openex(sock_type, proto, addr, flags, 0, 0, note); |
d6827718 | 445 | } |
446 | ||
e0d28505 AJ |
447 | void |
448 | comm_open_listener(int sock_type, | |
449 | int proto, | |
450 | Comm::ConnectionPointer &conn, | |
451 | const char *note) | |
452 | { | |
453 | /* all listener sockets require bind() */ | |
454 | conn->flags |= COMM_DOBIND; | |
455 | ||
456 | /* attempt native enabled port. */ | |
b5523edc | 457 | conn->fd = comm_openex(sock_type, proto, conn->local, conn->flags, 0, 0, note); |
e0d28505 AJ |
458 | } |
459 | ||
31be869c AJ |
460 | int |
461 | comm_open_listener(int sock_type, | |
04f7fd38 | 462 | int proto, |
b7ac5457 | 463 | Ip::Address &addr, |
04f7fd38 AJ |
464 | int flags, |
465 | const char *note) | |
31be869c AJ |
466 | { |
467 | int sock = -1; | |
468 | ||
ac760b5e AJ |
469 | /* all listener sockets require bind() */ |
470 | flags |= COMM_DOBIND; | |
471 | ||
31be869c | 472 | /* attempt native enabled port. */ |
425de4c8 | 473 | sock = comm_openex(sock_type, proto, addr, flags, 0, 0, note); |
31be869c | 474 | |
31be869c AJ |
475 | return sock; |
476 | } | |
477 | ||
2d8c0b1a | 478 | static bool |
479 | limitError(int const anErrno) | |
480 | { | |
481 | return anErrno == ENFILE || anErrno == EMFILE; | |
482 | } | |
d6827718 | 483 | |
cc192b50 | 484 | void |
485 | comm_set_v6only(int fd, int tos) | |
486 | { | |
487 | #ifdef IPV6_V6ONLY | |
488 | if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tos, sizeof(int)) < 0) { | |
e0236918 | 489 | debugs(50, DBG_IMPORTANT, "comm_open: setsockopt(IPV6_V6ONLY) " << (tos?"ON":"OFF") << " for FD " << fd << ": " << xstrerror()); |
cc192b50 | 490 | } |
491 | #else | |
492 | debugs(50, 0, "WARNING: comm_open: setsockopt(IPV6_V6ONLY) not supported on this platform"); | |
493 | #endif /* sockopt */ | |
494 | } | |
057f5854 | 495 | |
40d6264d AJ |
496 | /** |
497 | * Set the socket IP_TRANSPARENT option for Linux TPROXY v4 support. | |
498 | */ | |
f1e0717c | 499 | void |
e950e673 | 500 | comm_set_transparent(int fd) |
f1e0717c | 501 | { |
2ad20b4f | 502 | #if defined(IP_TRANSPARENT) |
e950e673 | 503 | int tos = 1; |
ef88b51d AJ |
504 | if (setsockopt(fd, SOL_IP, IP_TRANSPARENT, (char *) &tos, sizeof(int)) < 0) { |
505 | debugs(50, DBG_IMPORTANT, "comm_open: setsockopt(IP_TRANSPARENT) on FD " << fd << ": " << xstrerror()); | |
9e008dda | 506 | } else { |
3949d8b7 AJ |
507 | /* mark the socket as having transparent options */ |
508 | fd_table[fd].flags.transparent = 1; | |
509 | } | |
f1e0717c | 510 | #else |
ef88b51d | 511 | debugs(50, DBG_CRITICAL, "WARNING: comm_open: setsockopt(IP_TRANSPARENT) not supported on this platform"); |
f1e0717c AJ |
512 | #endif /* sockopt */ |
513 | } | |
514 | ||
e1a88700 | 515 | /** |
516 | * Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
517 | * is OR of flags specified in defines.h:COMM_* | |
518 | */ | |
d6827718 | 519 | int |
520 | comm_openex(int sock_type, | |
62e76326 | 521 | int proto, |
b7ac5457 | 522 | Ip::Address &addr, |
62e76326 | 523 | int flags, |
425de4c8 AJ |
524 | tos_t tos, |
525 | nfmark_t nfmark, | |
62e76326 | 526 | const char *note) |
090089c4 | 527 | { |
528 | int new_socket; | |
cc192b50 | 529 | struct addrinfo *AI = NULL; |
090089c4 | 530 | |
88bfe092 | 531 | PROF_start(comm_open); |
090089c4 | 532 | /* Create socket for accepting new connections. */ |
95dc7ff4 | 533 | ++ statCounter.syscalls.sock.sockets; |
62e76326 | 534 | |
cc192b50 | 535 | /* Setup the socket addrinfo details for use */ |
536 | addr.GetAddrInfo(AI); | |
537 | AI->ai_socktype = sock_type; | |
538 | AI->ai_protocol = proto; | |
cc192b50 | 539 | |
e884bbde | 540 | debugs(50, 3, "comm_openex: Attempt open socket for: " << addr ); |
cc192b50 | 541 | |
0eb08770 | 542 | new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); |
055421ee | 543 | |
0eb08770 HN |
544 | /* under IPv6 there is the possibility IPv6 is present but disabled. */ |
545 | /* try again as IPv4-native if possible */ | |
055421ee | 546 | if ( new_socket < 0 && Ip::EnableIpv6 && addr.IsIPv6() && addr.SetIPv4() ) { |
0eb08770 HN |
547 | /* attempt to open this IPv4-only. */ |
548 | addr.FreeAddrInfo(AI); | |
549 | /* Setup the socket addrinfo details for use */ | |
550 | addr.GetAddrInfo(AI); | |
551 | AI->ai_socktype = sock_type; | |
552 | AI->ai_protocol = proto; | |
553 | debugs(50, 3, "comm_openex: Attempt fallback open socket for: " << addr ); | |
ec505200 | 554 | new_socket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol); |
0eb08770 HN |
555 | debugs(50, 2, HERE << "attempt open " << note << " socket on: " << addr); |
556 | } | |
0eb08770 HN |
557 | |
558 | if (new_socket < 0) { | |
62e76326 | 559 | /* Increase the number of reserved fd's if calls to socket() |
560 | * are failing because the open file table is full. This | |
561 | * limits the number of simultaneous clients */ | |
562 | ||
2d8c0b1a | 563 | if (limitError(errno)) { |
dd4e714f | 564 | debugs(50, DBG_IMPORTANT, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 565 | fdAdjustReserved(); |
2d8c0b1a | 566 | } else { |
8ca8bd92 | 567 | debugs(50, DBG_CRITICAL, "comm_open: socket failure: " << xstrerror()); |
62e76326 | 568 | } |
569 | ||
cc192b50 | 570 | addr.FreeAddrInfo(AI); |
571 | ||
62e76326 | 572 | PROF_stop(comm_open); |
573 | return -1; | |
090089c4 | 574 | } |
62e76326 | 575 | |
1b76e6c1 | 576 | // XXX: temporary for the transition. comm_openex will eventually have a conn to play with. |
e884bbde AJ |
577 | Comm::ConnectionPointer conn = new Comm::Connection; |
578 | conn->local = addr; | |
b5523edc AJ |
579 | conn->fd = new_socket; |
580 | ||
581 | debugs(50, 3, "comm_openex: Opened socket " << conn << " : family=" << AI->ai_family << ", type=" << AI->ai_socktype << ", protocol=" << AI->ai_protocol ); | |
cc192b50 | 582 | |
d6827718 | 583 | /* set TOS if needed */ |
425de4c8 | 584 | if (tos) |
b5523edc | 585 | Ip::Qos::setSockTos(conn, tos); |
425de4c8 AJ |
586 | |
587 | /* set netfilter mark if needed */ | |
588 | if (nfmark) | |
b5523edc | 589 | Ip::Qos::setSockNfmark(conn, nfmark); |
62e76326 | 590 | |
055421ee | 591 | if ( Ip::EnableIpv6&IPV6_SPECIAL_SPLITSTACK && addr.IsIPv6() ) |
b5523edc | 592 | comm_set_v6only(conn->fd, 1); |
62e76326 | 593 | |
cc192b50 | 594 | /* Windows Vista supports Dual-Sockets. BUT defaults them to V6ONLY. Turn it OFF. */ |
9b1f7ee8 | 595 | /* Other OS may have this administratively disabled for general use. Same deal. */ |
055421ee | 596 | if ( Ip::EnableIpv6&IPV6_SPECIAL_V4MAPPING && addr.IsIPv6() ) |
b5523edc | 597 | comm_set_v6only(conn->fd, 0); |
cc192b50 | 598 | |
b5523edc AJ |
599 | comm_init_opened(conn, tos, nfmark, note, AI); |
600 | new_socket = comm_apply_flags(conn->fd, addr, flags, AI); | |
38344a8e AR |
601 | |
602 | addr.FreeAddrInfo(AI); | |
603 | ||
604 | PROF_stop(comm_open); | |
605 | ||
1b76e6c1 | 606 | // XXX transition only. prevent conn from closing the new FD on function exit. |
b5523edc | 607 | conn->fd = -1; |
38344a8e AR |
608 | return new_socket; |
609 | } | |
610 | ||
611 | /// update FD tables after a local or remote (IPC) comm_openex(); | |
612 | void | |
e0d28505 | 613 | comm_init_opened(const Comm::ConnectionPointer &conn, |
425de4c8 AJ |
614 | tos_t tos, |
615 | nfmark_t nfmark, | |
5667a628 AR |
616 | const char *note, |
617 | struct addrinfo *AI) | |
38344a8e | 618 | { |
e0d28505 | 619 | assert(Comm::IsConnOpen(conn)); |
38344a8e AR |
620 | assert(AI); |
621 | ||
090089c4 | 622 | /* update fdstat */ |
e0d28505 | 623 | debugs(5, 5, HERE << conn << " is a new socket"); |
62e76326 | 624 | |
e0d28505 AJ |
625 | assert(!isOpen(conn->fd)); // NP: global isOpen checks the fde entry for openness not the Comm::Connection |
626 | fd_open(conn->fd, FD_SOCKET, note); | |
62e76326 | 627 | |
e0d28505 AJ |
628 | fdd_table[conn->fd].close_file = NULL; |
629 | fdd_table[conn->fd].close_line = 0; | |
62e76326 | 630 | |
e0d28505 AJ |
631 | fde *F = &fd_table[conn->fd]; |
632 | F->local_addr = conn->local; | |
425de4c8 AJ |
633 | F->tosToServer = tos; |
634 | ||
635 | F->nfmarkToServer = nfmark; | |
cc192b50 | 636 | |
637 | F->sock_family = AI->ai_family; | |
38344a8e AR |
638 | } |
639 | ||
640 | /// apply flags after a local comm_open*() call; | |
641 | /// returns new_socket or -1 on error | |
642 | static int | |
643 | comm_apply_flags(int new_socket, | |
a67d2b2e | 644 | Ip::Address &addr, |
5667a628 AR |
645 | int flags, |
646 | struct addrinfo *AI) | |
38344a8e AR |
647 | { |
648 | assert(new_socket >= 0); | |
649 | assert(AI); | |
650 | const int sock_type = AI->ai_socktype; | |
62e76326 | 651 | |
79a15e0a | 652 | if (!(flags & COMM_NOCLOEXEC)) |
62e76326 | 653 | commSetCloseOnExec(new_socket); |
654 | ||
cdc33f35 | 655 | if ((flags & COMM_REUSEADDR)) |
62e76326 | 656 | commSetReuseAddr(new_socket); |
657 | ||
f45dd259 | 658 | if (addr.GetPort() > (unsigned short) 0) { |
1191b93b | 659 | #if _SQUID_MSWIN_ |
a50bfe93 | 660 | if (sock_type != SOCK_DGRAM) |
661 | #endif | |
a50bfe93 | 662 | commSetNoLinger(new_socket); |
62e76326 | 663 | |
664 | if (opt_reuseaddr) | |
665 | commSetReuseAddr(new_socket); | |
090089c4 | 666 | } |
62e76326 | 667 | |
a35595cd | 668 | /* MUST be done before binding or face OS Error: "(99) Cannot assign requested address"... */ |
9e008dda | 669 | if ((flags & COMM_TRANSPARENT)) { |
a35595cd AJ |
670 | comm_set_transparent(new_socket); |
671 | } | |
a35595cd | 672 | |
ac760b5e AJ |
673 | if ( (flags & COMM_DOBIND) || addr.GetPort() > 0 || !addr.IsAnyAddr() ) { |
674 | if ( !(flags & COMM_DOBIND) && addr.IsAnyAddr() ) | |
e0236918 | 675 | debugs(5, DBG_IMPORTANT,"WARNING: Squid is attempting to bind() port " << addr << " without being a listener."); |
ac760b5e AJ |
676 | if ( addr.IsNoAddr() ) |
677 | debugs(5,0,"CRITICAL: Squid is attempting to bind() port " << addr << "!!"); | |
678 | ||
cc192b50 | 679 | if (commBind(new_socket, *AI) != COMM_OK) { |
62e76326 | 680 | comm_close(new_socket); |
681 | return -1; | |
62e76326 | 682 | } |
23ff6968 | 683 | } |
62e76326 | 684 | |
79a15e0a | 685 | if (flags & COMM_NONBLOCKING) |
9e008dda | 686 | if (commSetNonBlocking(new_socket) == COMM_ERROR) { |
38344a8e | 687 | comm_close(new_socket); |
62e76326 | 688 | return -1; |
62e76326 | 689 | } |
690 | ||
30a4f2a8 | 691 | #ifdef TCP_NODELAY |
692 | if (sock_type == SOCK_STREAM) | |
62e76326 | 693 | commSetTcpNoDelay(new_socket); |
694 | ||
30a4f2a8 | 695 | #endif |
62e76326 | 696 | |
1241e63e | 697 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
62e76326 | 698 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); |
699 | ||
090089c4 | 700 | return new_socket; |
701 | } | |
702 | ||
a4c0f9c6 | 703 | void |
e0d28505 | 704 | comm_import_opened(const Comm::ConnectionPointer &conn, |
5667a628 AR |
705 | const char *note, |
706 | struct addrinfo *AI) | |
a4c0f9c6 | 707 | { |
e0d28505 AJ |
708 | debugs(5, 2, HERE << conn); |
709 | assert(Comm::IsConnOpen(conn)); | |
a4c0f9c6 AR |
710 | assert(AI); |
711 | ||
9c8a6c3b | 712 | comm_init_opened(conn, 0, 0, note, AI); |
a4c0f9c6 | 713 | |
e0d28505 AJ |
714 | if (!(conn->flags & COMM_NOCLOEXEC)) |
715 | fd_table[conn->fd].flags.close_on_exec = 1; | |
a4c0f9c6 | 716 | |
f45dd259 | 717 | if (conn->local.GetPort() > (unsigned short) 0) { |
1191b93b | 718 | #if _SQUID_MSWIN_ |
e0d28505 | 719 | if (AI->ai_socktype != SOCK_DGRAM) |
a4c0f9c6 | 720 | #endif |
e0d28505 | 721 | fd_table[conn->fd].flags.nolinger = 1; |
a4c0f9c6 AR |
722 | } |
723 | ||
e0d28505 AJ |
724 | if ((conn->flags & COMM_TRANSPARENT)) |
725 | fd_table[conn->fd].flags.transparent = 1; | |
a4c0f9c6 | 726 | |
e0d28505 AJ |
727 | if (conn->flags & COMM_NONBLOCKING) |
728 | fd_table[conn->fd].flags.nonblocking = 1; | |
a4c0f9c6 AR |
729 | |
730 | #ifdef TCP_NODELAY | |
731 | if (AI->ai_socktype == SOCK_STREAM) | |
e0d28505 | 732 | fd_table[conn->fd].flags.nodelay = 1; |
a4c0f9c6 AR |
733 | #endif |
734 | ||
735 | /* no fd_table[fd].flags. updates needed for these conditions: | |
736 | * if ((flags & COMM_REUSEADDR)) ... | |
737 | * if ((flags & COMM_DOBIND) ...) ... | |
738 | */ | |
739 | } | |
740 | ||
933dd095 AJ |
741 | // XXX: now that raw-FD timeouts are only unset for pipes and files this SHOULD be a no-op. |
742 | // With handler already unset. Leaving this present until that can be verified for all code paths. | |
743 | void | |
744 | commUnsetFdTimeout(int fd) | |
b0469965 | 745 | { |
933dd095 | 746 | debugs(5, 3, HERE << "Remove timeout for FD " << fd); |
b0469965 | 747 | assert(fd >= 0); |
748 | assert(fd < Squid_MaxFD); | |
749 | fde *F = &fd_table[fd]; | |
750 | assert(F->flags.open); | |
751 | ||
933dd095 AJ |
752 | F->timeoutHandler = NULL; |
753 | F->timeout = 0; | |
7957e704 AJ |
754 | } |
755 | ||
756 | int | |
757 | commSetConnTimeout(const Comm::ConnectionPointer &conn, int timeout, AsyncCall::Pointer &callback) | |
758 | { | |
759 | debugs(5, 3, HERE << conn << " timeout " << timeout); | |
760 | assert(Comm::IsConnOpen(conn)); | |
761 | assert(conn->fd < Squid_MaxFD); | |
762 | fde *F = &fd_table[conn->fd]; | |
763 | assert(F->flags.open); | |
764 | ||
765 | if (timeout < 0) { | |
766 | F->timeoutHandler = NULL; | |
767 | F->timeout = 0; | |
768 | } else { | |
769 | if (callback != NULL) { | |
770 | typedef CommTimeoutCbParams Params; | |
771 | Params ¶ms = GetCommParams<Params>(callback); | |
772 | params.conn = conn; | |
773 | F->timeoutHandler = callback; | |
774 | } | |
b0469965 | 775 | |
7957e704 AJ |
776 | F->timeout = squid_curtime + (time_t) timeout; |
777 | } | |
778 | ||
779 | return F->timeout; | |
b0469965 | 780 | } |
090089c4 | 781 | |
8d77a37c AJ |
782 | int |
783 | commUnsetConnTimeout(const Comm::ConnectionPointer &conn) | |
784 | { | |
785 | debugs(5, 3, HERE << "Remove timeout for " << conn); | |
786 | AsyncCall::Pointer nil; | |
787 | return commSetConnTimeout(conn, -1, nil); | |
788 | } | |
789 | ||
b8d8561b | 790 | int |
b7ac5457 | 791 | comm_connect_addr(int sock, const Ip::Address &address) |
090089c4 | 792 | { |
3d7e9d7c | 793 | comm_err_t status = COMM_OK; |
76f87348 | 794 | fde *F = &fd_table[sock]; |
cc192b50 | 795 | int x = 0; |
b5568a61 | 796 | int err = 0; |
9689d97c | 797 | socklen_t errlen; |
feca3b9a | 798 | struct addrinfo *AI = NULL; |
88bfe092 | 799 | PROF_start(comm_connect_addr); |
cc192b50 | 800 | |
801 | assert(address.GetPort() != 0); | |
802 | ||
fa6a39d7 | 803 | debugs(5, 9, HERE << "connecting socket FD " << sock << " to " << address << " (want family: " << F->sock_family << ")"); |
cc192b50 | 804 | |
3d98ff81 | 805 | /* Handle IPv6 over IPv4-only socket case. |
9d92af86 | 806 | * this case must presently be handled here since the GetAddrInfo asserts on bad mappings. |
3d98ff81 | 807 | * NP: because commResetFD is private to ConnStateData we have to return an error and |
9d92af86 AJ |
808 | * trust its handled properly. |
809 | */ | |
9e008dda | 810 | if (F->sock_family == AF_INET && !address.IsIPv4()) { |
3d98ff81 HN |
811 | errno = ENETUNREACH; |
812 | return COMM_ERR_PROTOCOL; | |
813 | } | |
814 | ||
815 | /* Handle IPv4 over IPv6-only socket case. | |
816 | * This case is presently handled here as it's both a known case and it's | |
817 | * uncertain what error will be returned by the IPv6 stack in such case. It's | |
818 | * possible this will also be handled by the errno checks below after connect() | |
819 | * but needs carefull cross-platform verification, and verifying the address | |
820 | * condition here is simple. | |
821 | */ | |
822 | if (!F->local_addr.IsIPv4() && address.IsIPv4()) { | |
823 | errno = ENETUNREACH; | |
9d92af86 AJ |
824 | return COMM_ERR_PROTOCOL; |
825 | } | |
9d92af86 | 826 | |
feca3b9a | 827 | address.GetAddrInfo(AI, F->sock_family); |
cc192b50 | 828 | |
090089c4 | 829 | /* Establish connection. */ |
b5568a61 | 830 | errno = 0; |
62e76326 | 831 | |
9e008dda | 832 | if (!F->flags.called_connect) { |
62e76326 | 833 | F->flags.called_connect = 1; |
95dc7ff4 | 834 | ++ statCounter.syscalls.sock.connects; |
62e76326 | 835 | |
feca3b9a | 836 | x = connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 837 | |
5a33a66a | 838 | // XXX: ICAP code refuses callbacks during a pending comm_ call |
839 | // Async calls development will fix this. | |
840 | if (x == 0) { | |
841 | x = -1; | |
842 | errno = EINPROGRESS; | |
843 | } | |
844 | ||
9e008dda | 845 | if (x < 0) { |
cc192b50 | 846 | debugs(5,5, "comm_connect_addr: sock=" << sock << ", addrinfo( " << |
9e008dda AJ |
847 | " flags=" << AI->ai_flags << |
848 | ", family=" << AI->ai_family << | |
849 | ", socktype=" << AI->ai_socktype << | |
850 | ", protocol=" << AI->ai_protocol << | |
851 | ", &addr=" << AI->ai_addr << | |
852 | ", addrlen=" << AI->ai_addrlen << | |
853 | " )" ); | |
cc192b50 | 854 | debugs(5, 9, "connect FD " << sock << ": (" << x << ") " << xstrerror()); |
855 | debugs(14,9, "connecting to: " << address ); | |
856 | } | |
9e008dda | 857 | } else { |
8a09e810 | 858 | #if _SQUID_NEWSOS6_ |
62e76326 | 859 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
860 | ||
feca3b9a | 861 | connect(sock, AI->ai_addr, AI->ai_addrlen); |
62e76326 | 862 | |
863 | if (errno == EINVAL) { | |
864 | errlen = sizeof(err); | |
865 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
866 | ||
867 | if (x >= 0) | |
868 | errno = x; | |
869 | } | |
870 | ||
33ac9442 | 871 | #else |
62e76326 | 872 | errlen = sizeof(err); |
873 | ||
874 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
875 | ||
876 | if (x == 0) | |
877 | errno = err; | |
878 | ||
8a09e810 | 879 | #if _SQUID_SOLARIS_ |
62e76326 | 880 | /* |
881 | * Solaris 2.4's socket emulation doesn't allow you | |
882 | * to determine the error from a failed non-blocking | |
883 | * connect and just returns EPIPE. Create a fake | |
884 | * error message for connect. -- fenner@parc.xerox.com | |
885 | */ | |
886 | if (x < 0 && errno == EPIPE) | |
887 | errno = ENOTCONN; | |
888 | ||
33ac9442 | 889 | #endif |
30a4f2a8 | 890 | #endif |
62e76326 | 891 | |
e5f6c5c2 | 892 | } |
62e76326 | 893 | |
9e008dda AJ |
894 | /* Squid seems to be working fine without this code. With this code, |
895 | * we leak memory on many connect requests because of EINPROGRESS. | |
896 | * If you find that this code is needed, please file a bug report. */ | |
82ec8dfc | 897 | #if 0 |
1191b93b | 898 | #if _SQUID_LINUX_ |
feca3b9a | 899 | /* 2007-11-27: |
9e008dda | 900 | * Linux Debian replaces our allocated AI pointer with garbage when |
feca3b9a AJ |
901 | * connect() fails. This leads to segmentation faults deallocating |
902 | * the system-allocated memory when we go to clean up our pointer. | |
903 | * HACK: is to leak the memory returned since we can't deallocate. | |
904 | */ | |
9e008dda | 905 | if (errno != 0) { |
feca3b9a AJ |
906 | AI = NULL; |
907 | } | |
82ec8dfc | 908 | #endif |
feca3b9a AJ |
909 | #endif |
910 | ||
911 | address.FreeAddrInfo(AI); | |
912 | ||
88bfe092 | 913 | PROF_stop(comm_connect_addr); |
62e76326 | 914 | |
b5568a61 | 915 | if (errno == 0 || errno == EISCONN) |
62e76326 | 916 | status = COMM_OK; |
b5568a61 | 917 | else if (ignoreErrno(errno)) |
62e76326 | 918 | status = COMM_INPROGRESS; |
3d98ff81 HN |
919 | else if (errno == EAFNOSUPPORT || errno == EINVAL) |
920 | return COMM_ERR_PROTOCOL; | |
b5568a61 | 921 | else |
3d98ff81 | 922 | return COMM_ERROR; |
62e76326 | 923 | |
cc192b50 | 924 | address.NtoA(F->ipaddr, MAX_IPSTRLEN); |
62e76326 | 925 | |
cc192b50 | 926 | F->remote_port = address.GetPort(); /* remote_port is HS */ |
62e76326 | 927 | |
9e008dda | 928 | if (status == COMM_OK) { |
e0236918 | 929 | debugs(5, DBG_DATA, "comm_connect_addr: FD " << sock << " connected to " << address); |
9e008dda | 930 | } else if (status == COMM_INPROGRESS) { |
e0236918 | 931 | debugs(5, DBG_DATA, "comm_connect_addr: FD " << sock << " connection pending"); |
090089c4 | 932 | } |
62e76326 | 933 | |
090089c4 | 934 | return status; |
935 | } | |
936 | ||
cb201b7e | 937 | void |
938 | commCallCloseHandlers(int fd) | |
939 | { | |
76f87348 | 940 | fde *F = &fd_table[fd]; |
bf8fe701 | 941 | debugs(5, 5, "commCallCloseHandlers: FD " << fd); |
62e76326 | 942 | |
8000a965 | 943 | while (F->closeHandler != NULL) { |
b0469965 | 944 | AsyncCall::Pointer call = F->closeHandler; |
9e008dda AJ |
945 | F->closeHandler = call->Next(); |
946 | call->setNext(NULL); | |
947 | // If call is not canceled schedule it for execution else ignore it | |
948 | if (!call->canceled()) { | |
949 | debugs(5, 5, "commCallCloseHandlers: ch->handler=" << call); | |
9e008dda AJ |
950 | ScheduleCallHere(call); |
951 | } | |
cb201b7e | 952 | } |
953 | } | |
954 | ||
5492ad1d | 955 | #if LINGERING_CLOSE |
956 | static void | |
957 | commLingerClose(int fd, void *unused) | |
958 | { | |
959 | LOCAL_ARRAY(char, buf, 1024); | |
960 | int n; | |
1f7c9178 | 961 | n = FD_READ_METHOD(fd, buf, 1024); |
62e76326 | 962 | |
5492ad1d | 963 | if (n < 0) |
bf8fe701 | 964 | debugs(5, 3, "commLingerClose: FD " << fd << " read: " << xstrerror()); |
62e76326 | 965 | |
5492ad1d | 966 | comm_close(fd); |
967 | } | |
968 | ||
969 | static void | |
933dd095 | 970 | commLingerTimeout(const FdeCbParams ¶ms) |
5492ad1d | 971 | { |
933dd095 AJ |
972 | debugs(5, 3, "commLingerTimeout: FD " << params.fd); |
973 | comm_close(params.fd); | |
5492ad1d | 974 | } |
975 | ||
976 | /* | |
977 | * Inspired by apache | |
978 | */ | |
979 | void | |
980 | comm_lingering_close(int fd) | |
981 | { | |
d4c19b39 | 982 | #if USE_SSL |
983 | if (fd_table[fd].ssl) | |
575d05c4 | 984 | ssl_shutdown_method(fd_table[fd].ssl); |
d4c19b39 | 985 | #endif |
62e76326 | 986 | |
5492ad1d | 987 | if (shutdown(fd, 1) < 0) { |
62e76326 | 988 | comm_close(fd); |
989 | return; | |
5492ad1d | 990 | } |
62e76326 | 991 | |
5492ad1d | 992 | fd_note(fd, "lingering close"); |
933dd095 AJ |
993 | AsyncCall::Pointer call = commCbCall(5,4, "commLingerTimeout", FdeCbPtrFun(commLingerTimeout, NULL)); |
994 | ||
995 | debugs(5, 3, HERE << "FD " << fd << " timeout " << timeout); | |
996 | assert(fd_table[fd].flags.open); | |
997 | if (callback != NULL) { | |
998 | typedef FdeCbParams Params; | |
999 | Params ¶ms = GetCommParams<Params>(callback); | |
1000 | params.fd = fd; | |
1001 | fd_table[fd].timeoutHandler = callback; | |
1002 | fd_table[fd].timeout = squid_curtime + static_cast<time_t>(10); | |
1003 | } | |
1004 | ||
d841c88d | 1005 | Comm::SetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); |
5492ad1d | 1006 | } |
62e76326 | 1007 | |
5492ad1d | 1008 | #endif |
1009 | ||
27774cee | 1010 | /** |
98264874 | 1011 | * enable linger with time of 0 so that when the socket is |
1012 | * closed, TCP generates a RESET | |
1013 | */ | |
1014 | void | |
8ace824c | 1015 | comm_reset_close(const Comm::ConnectionPointer &conn) |
98264874 | 1016 | { |
5c336a3b AJ |
1017 | struct linger L; |
1018 | L.l_onoff = 1; | |
1019 | L.l_linger = 0; | |
62e76326 | 1020 | |
5c336a3b | 1021 | if (setsockopt(conn->fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
1b76e6c1 | 1022 | debugs(50, DBG_CRITICAL, "ERROR: Closing " << conn << " with TCP RST: " << xstrerror()); |
5c336a3b AJ |
1023 | |
1024 | conn->close(); | |
1025 | } | |
1026 | ||
1027 | // Legacy close function. | |
1028 | void | |
1029 | old_comm_reset_close(int fd) | |
1030 | { | |
98264874 | 1031 | struct linger L; |
1032 | L.l_onoff = 1; | |
1033 | L.l_linger = 0; | |
62e76326 | 1034 | |
98264874 | 1035 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
468fe1b5 | 1036 | debugs(50, DBG_CRITICAL, "ERROR: Closing FD " << fd << " with TCP RST: " << xstrerror()); |
62e76326 | 1037 | |
98264874 | 1038 | comm_close(fd); |
1039 | } | |
1040 | ||
575d05c4 | 1041 | #if USE_SSL |
9e008dda | 1042 | void |
a17bf806 | 1043 | commStartSslClose(const FdeCbParams ¶ms) |
10b06767 | 1044 | { |
575d05c4 AJ |
1045 | assert(&fd_table[params.fd].ssl); |
1046 | ssl_shutdown_method(fd_table[params.fd].ssl); | |
10b06767 | 1047 | } |
575d05c4 | 1048 | #endif |
10b06767 | 1049 | |
9e008dda | 1050 | void |
a17bf806 | 1051 | comm_close_complete(const FdeCbParams ¶ms) |
2d8c0b1a | 1052 | { |
b0469965 | 1053 | #if USE_SSL |
575d05c4 | 1054 | fde *F = &fd_table[params.fd]; |
2d8c0b1a | 1055 | |
b0469965 | 1056 | if (F->ssl) { |
1057 | SSL_free(F->ssl); | |
1058 | F->ssl = NULL; | |
1059 | } | |
2d8c0b1a | 1060 | |
95d2589c CT |
1061 | if (F->dynamicSslContext) { |
1062 | SSL_CTX_free(F->dynamicSslContext); | |
1063 | F->dynamicSslContext = NULL; | |
1064 | } | |
b0469965 | 1065 | #endif |
575d05c4 AJ |
1066 | fd_close(params.fd); /* update fdstat */ |
1067 | close(params.fd); | |
b0469965 | 1068 | |
95dc7ff4 | 1069 | ++ statCounter.syscalls.sock.closes; |
b0469965 | 1070 | |
575d05c4 | 1071 | /* When one connection closes, give accept() a chance, if need be */ |
04f55905 | 1072 | Comm::AcceptLimiter::Instance().kick(); |
2d8c0b1a | 1073 | } |
c4b7a5a9 | 1074 | |
1075 | /* | |
1076 | * Close the socket fd. | |
1077 | * | |
1078 | * + call write handlers with ERR_CLOSING | |
1079 | * + call read handlers with ERR_CLOSING | |
1080 | * + call closing handlers | |
a46d2c0e | 1081 | * |
9e008dda | 1082 | * NOTE: COMM_ERR_CLOSING will NOT be called for CommReads' sitting in a |
a46d2c0e | 1083 | * DeferredReadManager. |
c4b7a5a9 | 1084 | */ |
b8d8561b | 1085 | void |
43ae1d95 | 1086 | _comm_close(int fd, char const *file, int line) |
090089c4 | 1087 | { |
82ec8dfc | 1088 | debugs(5, 3, "comm_close: start closing FD " << fd); |
03eb2f01 | 1089 | assert(fd >= 0); |
1090 | assert(fd < Squid_MaxFD); | |
82ec8dfc AR |
1091 | |
1092 | fde *F = &fd_table[fd]; | |
c4b7a5a9 | 1093 | fdd_table[fd].close_file = file; |
1094 | fdd_table[fd].close_line = line; | |
1f7c9178 | 1095 | |
82ec8dfc | 1096 | if (F->closing()) |
62e76326 | 1097 | return; |
1098 | ||
36afac26 | 1099 | /* XXX: is this obsolete behind F->closing() ? */ |
b8869bcf | 1100 | if ( (shutting_down || reconfiguring) && (!F->flags.open || F->type == FD_FILE)) |
62e76326 | 1101 | return; |
1102 | ||
c4b7a5a9 | 1103 | /* The following fails because ipc.c is doing calls to pipe() to create sockets! */ |
c7e637d7 AJ |
1104 | if (!isOpen(fd)) { |
1105 | debugs(50, DBG_IMPORTANT, HERE << "BUG 3556: FD " << fd << " is not an open socket."); | |
1106 | // XXX: do we need to run close(fd) or fd_close(fd) here? | |
1107 | return; | |
1108 | } | |
62e76326 | 1109 | |
76f87348 | 1110 | assert(F->type != FD_FILE); |
62e76326 | 1111 | |
88bfe092 | 1112 | PROF_start(comm_close); |
62e76326 | 1113 | |
10b06767 | 1114 | F->flags.close_request = 1; |
62e76326 | 1115 | |
575d05c4 AJ |
1116 | #if USE_SSL |
1117 | if (F->ssl) { | |
575d05c4 | 1118 | AsyncCall::Pointer startCall=commCbCall(5,4, "commStartSslClose", |
a17bf806 AJ |
1119 | FdeCbPtrFun(commStartSslClose, NULL)); |
1120 | FdeCbParams &startParams = GetCommParams<FdeCbParams>(startCall); | |
575d05c4 AJ |
1121 | startParams.fd = fd; |
1122 | ScheduleCallHere(startCall); | |
1123 | } | |
1124 | #endif | |
62e76326 | 1125 | |
74257126 AR |
1126 | // a half-closed fd may lack a reader, so we stop monitoring explicitly |
1127 | if (commHasHalfClosedMonitor(fd)) | |
1128 | commStopHalfClosedMonitor(fd); | |
933dd095 | 1129 | commUnsetFdTimeout(fd); |
62e76326 | 1130 | |
a6351f16 | 1131 | // notify read/write handlers after canceling select reservations, if any |
ec41b64c | 1132 | if (COMMIO_FD_WRITECB(fd)->active()) { |
d841c88d | 1133 | Comm::SetSelect(fd, COMM_SELECT_WRITE, NULL, NULL, 0); |
ec41b64c | 1134 | COMMIO_FD_WRITECB(fd)->finish(COMM_ERR_CLOSING, errno); |
2b663917 | 1135 | } |
ec41b64c | 1136 | if (COMMIO_FD_READCB(fd)->active()) { |
d841c88d | 1137 | Comm::SetSelect(fd, COMM_SELECT_READ, NULL, NULL, 0); |
ec41b64c | 1138 | COMMIO_FD_READCB(fd)->finish(COMM_ERR_CLOSING, errno); |
2b663917 | 1139 | } |
2d8c0b1a | 1140 | |
9a0a18de | 1141 | #if USE_DELAY_POOLS |
b4cd430a CT |
1142 | if (ClientInfo *clientInfo = F->clientInfo) { |
1143 | if (clientInfo->selectWaiting) { | |
1144 | clientInfo->selectWaiting = false; | |
1145 | // kick queue or it will get stuck as commWriteHandle is not called | |
1146 | clientInfo->kickQuotaQueue(); | |
1147 | } | |
f33d34a8 | 1148 | } |
b4cd430a CT |
1149 | #endif |
1150 | ||
cb201b7e | 1151 | commCallCloseHandlers(fd); |
62e76326 | 1152 | |
fb505fa1 | 1153 | if (F->pconn.uses && F->pconn.pool) |
2dba5b8e | 1154 | F->pconn.pool->noteUses(F->pconn.uses); |
62e76326 | 1155 | |
a7ad6e4e | 1156 | comm_empty_os_read_buffers(fd); |
9e008dda | 1157 | |
10b06767 | 1158 | AsyncCall::Pointer completeCall=commCbCall(5,4, "comm_close_complete", |
a17bf806 AJ |
1159 | FdeCbPtrFun(comm_close_complete, NULL)); |
1160 | FdeCbParams &completeParams = GetCommParams<FdeCbParams>(completeCall); | |
10b06767 | 1161 | completeParams.fd = fd; |
9e008dda | 1162 | // must use async call to wait for all callbacks |
82ec8dfc | 1163 | // scheduled before comm_close() to finish |
10b06767 | 1164 | ScheduleCallHere(completeCall); |
62e76326 | 1165 | |
88bfe092 | 1166 | PROF_stop(comm_close); |
090089c4 | 1167 | } |
1168 | ||
090089c4 | 1169 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 1170 | int |
5df61230 | 1171 | comm_udp_sendto(int fd, |
b7ac5457 | 1172 | const Ip::Address &to_addr, |
62e76326 | 1173 | const void *buf, |
1174 | int len) | |
090089c4 | 1175 | { |
cc192b50 | 1176 | int x = 0; |
1177 | struct addrinfo *AI = NULL; | |
1178 | ||
88bfe092 | 1179 | PROF_start(comm_udp_sendto); |
95dc7ff4 | 1180 | ++ statCounter.syscalls.sock.sendtos; |
62e76326 | 1181 | |
cc192b50 | 1182 | debugs(50, 3, "comm_udp_sendto: Attempt to send UDP packet to " << to_addr << |
9e008dda | 1183 | " using FD " << fd << " using Port " << comm_local_port(fd) ); |
cc192b50 | 1184 | |
1185 | /* BUG: something in the above macro appears to occasionally be setting AI to garbage. */ | |
1186 | /* AYJ: 2007-08-27 : or was it because I wasn't then setting 'fd_table[fd].sock_family' to fill properly. */ | |
1187 | assert( NULL == AI ); | |
1188 | ||
1189 | to_addr.GetAddrInfo(AI, fd_table[fd].sock_family); | |
1190 | ||
1191 | x = sendto(fd, buf, len, 0, AI->ai_addr, AI->ai_addrlen); | |
1192 | ||
1193 | to_addr.FreeAddrInfo(AI); | |
1194 | ||
88bfe092 | 1195 | PROF_stop(comm_udp_sendto); |
62e76326 | 1196 | |
2d8c0b1a | 1197 | if (x >= 0) |
1198 | return x; | |
1199 | ||
1191b93b | 1200 | #if _SQUID_LINUX_ |
62e76326 | 1201 | |
2d8c0b1a | 1202 | if (ECONNREFUSED != errno) |
17d51783 | 1203 | #endif |
62e76326 | 1204 | |
e0236918 | 1205 | debugs(50, DBG_IMPORTANT, "comm_udp_sendto: FD " << fd << ", (family=" << fd_table[fd].sock_family << ") " << to_addr << ": " << xstrerror()); |
62e76326 | 1206 | |
2d8c0b1a | 1207 | return COMM_ERROR; |
090089c4 | 1208 | } |
1209 | ||
b8d8561b | 1210 | void |
575d05c4 | 1211 | comm_add_close_handler(int fd, CLCB * handler, void *data) |
30a4f2a8 | 1212 | { |
bf8fe701 | 1213 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", handler=" << |
1214 | handler << ", data=" << data); | |
62e76326 | 1215 | |
b0469965 | 1216 | AsyncCall::Pointer call=commCbCall(5,4, "SomeCloseHandler", |
9e008dda | 1217 | CommCloseCbPtrFun(handler, data)); |
b0469965 | 1218 | comm_add_close_handler(fd, call); |
1219 | } | |
62e76326 | 1220 | |
b0469965 | 1221 | void |
1222 | comm_add_close_handler(int fd, AsyncCall::Pointer &call) | |
1223 | { | |
1224 | debugs(5, 5, "comm_add_close_handler: FD " << fd << ", AsyncCall=" << call); | |
62e76326 | 1225 | |
b0469965 | 1226 | /*TODO:Check for a similar scheduled AsyncCall*/ |
1227 | // for (c = fd_table[fd].closeHandler; c; c = c->next) | |
1228 | // assert(c->handler != handler || c->data != data); | |
62e76326 | 1229 | |
b0469965 | 1230 | call->setNext(fd_table[fd].closeHandler); |
62e76326 | 1231 | |
b0469965 | 1232 | fd_table[fd].closeHandler = call; |
30a4f2a8 | 1233 | } |
1234 | ||
b0469965 | 1235 | // remove function-based close handler |
b8d8561b | 1236 | void |
575d05c4 | 1237 | comm_remove_close_handler(int fd, CLCB * handler, void *data) |
090089c4 | 1238 | { |
b0469965 | 1239 | assert (isOpen(fd)); |
30a4f2a8 | 1240 | /* Find handler in list */ |
bf8fe701 | 1241 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", handler=" << |
1242 | handler << ", data=" << data); | |
62e76326 | 1243 | |
37cba319 AR |
1244 | AsyncCall::Pointer p, prev = NULL; |
1245 | for (p = fd_table[fd].closeHandler; p != NULL; prev = p, p = p->Next()) { | |
b0469965 | 1246 | typedef CommCbFunPtrCallT<CommCloseCbPtrFun> Call; |
1247 | const Call *call = dynamic_cast<const Call*>(p.getRaw()); | |
1248 | if (!call) // method callbacks have their own comm_remove_close_handler | |
1249 | continue; | |
62e76326 | 1250 | |
b0469965 | 1251 | typedef CommCloseCbParams Params; |
1252 | const Params ¶ms = GetCommParams<Params>(p); | |
1253 | if (call->dialer.handler == handler && params.data == data) | |
1254 | break; /* This is our handler */ | |
1255 | } | |
7828df5b CT |
1256 | |
1257 | // comm_close removes all close handlers so our handler may be gone | |
37cba319 AR |
1258 | if (p != NULL) { |
1259 | p->dequeue(fd_table[fd].closeHandler, prev); | |
7828df5b | 1260 | p->cancel("comm_remove_close_handler"); |
37cba319 | 1261 | } |
b0469965 | 1262 | } |
62e76326 | 1263 | |
b0469965 | 1264 | // remove method-based close handler |
1265 | void | |
1266 | comm_remove_close_handler(int fd, AsyncCall::Pointer &call) | |
1267 | { | |
1268 | assert (isOpen(fd)); | |
b0469965 | 1269 | debugs(5, 5, "comm_remove_close_handler: FD " << fd << ", AsyncCall=" << call); |
62e76326 | 1270 | |
7828df5b | 1271 | // comm_close removes all close handlers so our handler may be gone |
37cba319 AR |
1272 | AsyncCall::Pointer p, prev = NULL; |
1273 | for (p = fd_table[fd].closeHandler; p != NULL && p != call; prev = p, p = p->Next()); | |
62e76326 | 1274 | |
37cba319 AR |
1275 | if (p != NULL) |
1276 | p->dequeue(fd_table[fd].closeHandler, prev); | |
b0469965 | 1277 | call->cancel("comm_remove_close_handler"); |
30a4f2a8 | 1278 | } |
090089c4 | 1279 | |
b8d8561b | 1280 | static void |
1281 | commSetNoLinger(int fd) | |
30a4f2a8 | 1282 | { |
62e76326 | 1283 | |
30a4f2a8 | 1284 | struct linger L; |
090089c4 | 1285 | L.l_onoff = 0; /* off */ |
1286 | L.l_linger = 0; | |
62e76326 | 1287 | |
30a4f2a8 | 1288 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
bf8fe701 | 1289 | debugs(50, 0, "commSetNoLinger: FD " << fd << ": " << xstrerror()); |
62e76326 | 1290 | |
58a6c186 | 1291 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 1292 | } |
1293 | ||
b8d8561b | 1294 | static void |
1295 | commSetReuseAddr(int fd) | |
090089c4 | 1296 | { |
1297 | int on = 1; | |
62e76326 | 1298 | |
30a4f2a8 | 1299 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
e0236918 | 1300 | debugs(50, DBG_IMPORTANT, "commSetReuseAddr: FD " << fd << ": " << xstrerror()); |
090089c4 | 1301 | } |
1302 | ||
b8d8561b | 1303 | static void |
1304 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 1305 | { |
1306 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
e0236918 | 1307 | debugs(50, DBG_IMPORTANT, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1308 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)) < 0) |
e0236918 | 1309 | debugs(50, DBG_IMPORTANT, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1310 | #ifdef TCP_WINDOW_CLAMP |
1311 | if (setsockopt(fd, SOL_TCP, TCP_WINDOW_CLAMP, (char *) &size, sizeof(size)) < 0) | |
e0236918 | 1312 | debugs(50, DBG_IMPORTANT, "commSetTcpRcvbuf: FD " << fd << ", SIZE " << size << ": " << xstrerror()); |
8f0d53ef | 1313 | #endif |
f868539a | 1314 | } |
1315 | ||
b8d8561b | 1316 | int |
1317 | commSetNonBlocking(int fd) | |
30a4f2a8 | 1318 | { |
1191b93b | 1319 | #if !_SQUID_MSWIN_ |
731e4d49 | 1320 | int flags; |
9e205701 | 1321 | int dummy = 0; |
a50bfe93 | 1322 | #endif |
be266cb2 | 1323 | #if _SQUID_WINDOWS_ |
b05490a8 | 1324 | int nonblocking = TRUE; |
62e76326 | 1325 | |
be266cb2 | 1326 | #if _SQUID_CYGWIN_ |
7f6ffd15 | 1327 | if (fd_table[fd].type != FD_PIPE) { |
629b5f75 | 1328 | #endif |
1329 | ||
62e76326 | 1330 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { |
bf8fe701 | 1331 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror() << " " << fd_table[fd].type); |
62e76326 | 1332 | return COMM_ERROR; |
1333 | } | |
629b5f75 | 1334 | |
be266cb2 | 1335 | #if _SQUID_CYGWIN_ |
7f6ffd15 | 1336 | } else { |
1337 | #endif | |
629b5f75 | 1338 | #endif |
1191b93b | 1339 | #if !_SQUID_MSWIN_ |
62e76326 | 1340 | |
1341 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
bf8fe701 | 1342 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1343 | return COMM_ERROR; |
1344 | } | |
1345 | ||
1346 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
bf8fe701 | 1347 | debugs(50, 0, "commSetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1348 | return COMM_ERROR; |
1349 | } | |
1350 | ||
a50bfe93 | 1351 | #endif |
be266cb2 | 1352 | #if _SQUID_CYGWIN_ |
090089c4 | 1353 | } |
7f6ffd15 | 1354 | #endif |
58a6c186 | 1355 | fd_table[fd].flags.nonblocking = 1; |
62e76326 | 1356 | |
090089c4 | 1357 | return 0; |
1358 | } | |
1359 | ||
7e3ce7b9 | 1360 | int |
1361 | commUnsetNonBlocking(int fd) | |
1362 | { | |
1191b93b | 1363 | #if _SQUID_MSWIN_ |
a50bfe93 | 1364 | int nonblocking = FALSE; |
1365 | ||
1366 | if (ioctlsocket(fd, FIONBIO, (unsigned long *) &nonblocking) < 0) { | |
1367 | #else | |
7e3ce7b9 | 1368 | int flags; |
1369 | int dummy = 0; | |
62e76326 | 1370 | |
7e3ce7b9 | 1371 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
bf8fe701 | 1372 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFL: " << xstrerror()); |
62e76326 | 1373 | return COMM_ERROR; |
7e3ce7b9 | 1374 | } |
62e76326 | 1375 | |
7e3ce7b9 | 1376 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { |
a50bfe93 | 1377 | #endif |
bf8fe701 | 1378 | debugs(50, 0, "commUnsetNonBlocking: FD " << fd << ": " << xstrerror()); |
62e76326 | 1379 | return COMM_ERROR; |
7e3ce7b9 | 1380 | } |
62e76326 | 1381 | |
7e3ce7b9 | 1382 | fd_table[fd].flags.nonblocking = 0; |
1383 | return 0; | |
1384 | } | |
1385 | ||
b8d8561b | 1386 | void |
e1381638 AJ |
1387 | commSetCloseOnExec(int fd) |
1388 | { | |
3ca60c86 | 1389 | #ifdef FD_CLOEXEC |
731e4d49 | 1390 | int flags; |
7a18b487 | 1391 | int dummy = 0; |
62e76326 | 1392 | |
2209fe19 AJ |
1393 | if ((flags = fcntl(fd, F_GETFD, dummy)) < 0) { |
1394 | debugs(50, 0, "FD " << fd << ": fcntl F_GETFD: " << xstrerror()); | |
62e76326 | 1395 | return; |
3ca60c86 | 1396 | } |
62e76326 | 1397 | |
24382924 | 1398 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
bf8fe701 | 1399 | debugs(50, 0, "FD " << fd << ": set close-on-exec failed: " << xstrerror()); |
62e76326 | 1400 | |
d6827718 | 1401 | fd_table[fd].flags.close_on_exec = 1; |
62e76326 | 1402 | |
3ca60c86 | 1403 | #endif |
1404 | } | |
1405 | ||
e90100aa | 1406 | #ifdef TCP_NODELAY |
1407 | static void | |
e1381638 AJ |
1408 | commSetTcpNoDelay(int fd) |
1409 | { | |
e90100aa | 1410 | int on = 1; |
62e76326 | 1411 | |
e90100aa | 1412 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) |
e0236918 | 1413 | debugs(50, DBG_IMPORTANT, "commSetTcpNoDelay: FD " << fd << ": " << xstrerror()); |
62e76326 | 1414 | |
d6827718 | 1415 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 1416 | } |
62e76326 | 1417 | |
e90100aa | 1418 | #endif |
1419 | ||
b2130d58 | 1420 | void |
e1381638 AJ |
1421 | commSetTcpKeepalive(int fd, int idle, int interval, int timeout) |
1422 | { | |
b2130d58 | 1423 | int on = 1; |
1424 | #ifdef TCP_KEEPCNT | |
1425 | if (timeout && interval) { | |
9e008dda AJ |
1426 | int count = (timeout + interval - 1) / interval; |
1427 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &count, sizeof(on)) < 0) | |
e0236918 | 1428 | debugs(5, DBG_IMPORTANT, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1429 | } |
1430 | #endif | |
1431 | #ifdef TCP_KEEPIDLE | |
1432 | if (idle) { | |
9e008dda | 1433 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(on)) < 0) |
e0236918 | 1434 | debugs(5, DBG_IMPORTANT, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1435 | } |
1436 | #endif | |
1437 | #ifdef TCP_KEEPINTVL | |
1438 | if (interval) { | |
9e008dda | 1439 | if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval, sizeof(on)) < 0) |
e0236918 | 1440 | debugs(5, DBG_IMPORTANT, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1441 | } |
1442 | #endif | |
1443 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) < 0) | |
e0236918 | 1444 | debugs(5, DBG_IMPORTANT, "commSetKeepalive: FD " << fd << ": " << xstrerror()); |
b2130d58 | 1445 | } |
6a988308 | 1446 | |
d86b3703 | 1447 | void |
e1381638 AJ |
1448 | comm_init(void) |
1449 | { | |
c4b7a5a9 | 1450 | fd_table =(fde *) xcalloc(Squid_MaxFD, sizeof(fde)); |
1451 | fdd_table = (fd_debug_t *)xcalloc(Squid_MaxFD, sizeof(fd_debug_t)); | |
2d8c0b1a | 1452 | |
04f55905 AJ |
1453 | /* make sure the accept() socket FIFO delay queue exists */ |
1454 | Comm::AcceptLimiter::Instance(); | |
b0469965 | 1455 | |
ec41b64c AJ |
1456 | // make sure the IO pending callback table exists |
1457 | Comm::CallbackTableInit(); | |
2d8c0b1a | 1458 | |
59c4d35b | 1459 | /* XXX account fd_table */ |
090089c4 | 1460 | /* Keep a few file descriptors free so that we don't run out of FD's |
1461 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 1462 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
d85c3078 | 1463 | RESERVED_FD = min(100, Squid_MaxFD / 4); |
2d8c0b1a | 1464 | |
04eb0689 | 1465 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
74257126 AR |
1466 | |
1467 | TheHalfClosed = new DescriptorSet; | |
d841c88d AJ |
1468 | |
1469 | /* setup the select loop module */ | |
1470 | Comm::SelectLoopInit(); | |
090089c4 | 1471 | } |
1472 | ||
236d1779 | 1473 | void |
e1381638 AJ |
1474 | comm_exit(void) |
1475 | { | |
74257126 AR |
1476 | delete TheHalfClosed; |
1477 | TheHalfClosed = NULL; | |
1478 | ||
236d1779 | 1479 | safe_free(fd_table); |
1480 | safe_free(fdd_table); | |
ec41b64c | 1481 | Comm::CallbackTableDestruct(); |
236d1779 | 1482 | } |
1483 | ||
9a0a18de | 1484 | #if USE_DELAY_POOLS |
b4cd430a | 1485 | // called when the queue is done waiting for the client bucket to fill |
ec41b64c | 1486 | void |
b4cd430a CT |
1487 | commHandleWriteHelper(void * data) |
1488 | { | |
1489 | CommQuotaQueue *queue = static_cast<CommQuotaQueue*>(data); | |
1490 | assert(queue); | |
1491 | ||
1492 | ClientInfo *clientInfo = queue->clientInfo; | |
1493 | // ClientInfo invalidates queue if freed, so if we got here through, | |
1494 | // evenAdd cbdata protections, everything should be valid and consistent | |
f33d34a8 | 1495 | assert(clientInfo); |
b4cd430a CT |
1496 | assert(clientInfo->hasQueue()); |
1497 | assert(clientInfo->hasQueue(queue)); | |
1498 | assert(!clientInfo->selectWaiting); | |
1499 | assert(clientInfo->eventWaiting); | |
1500 | clientInfo->eventWaiting = false; | |
1501 | ||
1502 | do { | |
1503 | // check that the head descriptor is still relevant | |
1504 | const int head = clientInfo->quotaPeekFd(); | |
ec41b64c | 1505 | Comm::IoCallback *ccb = COMMIO_FD_WRITECB(head); |
b4cd430a CT |
1506 | |
1507 | if (fd_table[head].clientInfo == clientInfo && | |
f33d34a8 A |
1508 | clientInfo->quotaPeekReserv() == ccb->quotaQueueReserv && |
1509 | !fd_table[head].closing()) { | |
b4cd430a CT |
1510 | |
1511 | // wait for the head descriptor to become ready for writing | |
d841c88d | 1512 | Comm::SetSelect(head, COMM_SELECT_WRITE, Comm::HandleWrite, ccb, 0); |
b4cd430a CT |
1513 | clientInfo->selectWaiting = true; |
1514 | return; | |
f33d34a8 | 1515 | } |
b4cd430a | 1516 | |
f33d34a8 A |
1517 | clientInfo->quotaDequeue(); // remove the no longer relevant descriptor |
1518 | // and continue looking for a relevant one | |
b4cd430a CT |
1519 | } while (clientInfo->hasQueue()); |
1520 | ||
1521 | debugs(77,3, HERE << "emptied queue"); | |
1522 | } | |
1523 | ||
1524 | bool | |
1525 | ClientInfo::hasQueue() const | |
1526 | { | |
1527 | assert(quotaQueue); | |
1528 | return !quotaQueue->empty(); | |
1529 | } | |
1530 | ||
1531 | bool | |
1532 | ClientInfo::hasQueue(const CommQuotaQueue *q) const | |
1533 | { | |
1534 | assert(quotaQueue); | |
1535 | return quotaQueue == q; | |
1536 | } | |
1537 | ||
1538 | /// returns the first descriptor to be dequeued | |
1539 | int | |
1540 | ClientInfo::quotaPeekFd() const | |
1541 | { | |
1542 | assert(quotaQueue); | |
1543 | return quotaQueue->front(); | |
1544 | } | |
1545 | ||
1546 | /// returns the reservation ID of the first descriptor to be dequeued | |
1547 | unsigned int | |
1548 | ClientInfo::quotaPeekReserv() const | |
1549 | { | |
1550 | assert(quotaQueue); | |
1551 | return quotaQueue->outs + 1; | |
1552 | } | |
1553 | ||
1554 | /// queues a given fd, creating the queue if necessary; returns reservation ID | |
1555 | unsigned int | |
1556 | ClientInfo::quotaEnqueue(int fd) | |
1557 | { | |
1558 | assert(quotaQueue); | |
1559 | return quotaQueue->enqueue(fd); | |
1560 | } | |
1561 | ||
1562 | /// removes queue head | |
1563 | void | |
1564 | ClientInfo::quotaDequeue() | |
1565 | { | |
1566 | assert(quotaQueue); | |
1567 | quotaQueue->dequeue(); | |
1568 | } | |
1569 | ||
1570 | void | |
1571 | ClientInfo::kickQuotaQueue() | |
1572 | { | |
1573 | if (!eventWaiting && !selectWaiting && hasQueue()) { | |
1574 | // wait at least a second if the bucket is empty | |
1575 | const double delay = (bucketSize < 1.0) ? 1.0 : 0.0; | |
1576 | eventAdd("commHandleWriteHelper", &commHandleWriteHelper, | |
f33d34a8 | 1577 | quotaQueue, delay, 0, true); |
b4cd430a CT |
1578 | eventWaiting = true; |
1579 | } | |
1580 | } | |
1581 | ||
1582 | /// calculates how much to write for a single dequeued client | |
1583 | int | |
1584 | ClientInfo::quotaForDequed() | |
1585 | { | |
1586 | /* If we have multiple clients and give full bucketSize to each client then | |
1587 | * clt1 may often get a lot more because clt1->clt2 time distance in the | |
1588 | * select(2) callback order may be a lot smaller than cltN->clt1 distance. | |
1589 | * We divide quota evenly to be more fair. */ | |
1590 | ||
1591 | if (!rationedCount) { | |
1592 | rationedCount = quotaQueue->size() + 1; | |
1593 | ||
1594 | // The delay in ration recalculation _temporary_ deprives clients from | |
1595 | // bytes that should have trickled in while rationedCount was positive. | |
1596 | refillBucket(); | |
1597 | ||
1598 | // Rounding errors do not accumulate here, but we round down to avoid | |
1599 | // negative bucket sizes after write with rationedCount=1. | |
1600 | rationedQuota = static_cast<int>(floor(bucketSize/rationedCount)); | |
1601 | debugs(77,5, HERE << "new rationedQuota: " << rationedQuota << | |
f33d34a8 | 1602 | '*' << rationedCount); |
b4cd430a CT |
1603 | } |
1604 | ||
1605 | --rationedCount; | |
1606 | debugs(77,7, HERE << "rationedQuota: " << rationedQuota << | |
f33d34a8 | 1607 | " rations remaining: " << rationedCount); |
b4cd430a CT |
1608 | |
1609 | // update 'last seen' time to prevent clientdb GC from dropping us | |
1610 | last_seen = squid_curtime; | |
1611 | return rationedQuota; | |
1612 | } | |
1613 | ||
1614 | ///< adds bytes to the quota bucket based on the rate and passed time | |
1615 | void | |
1616 | ClientInfo::refillBucket() | |
1617 | { | |
1618 | // all these times are in seconds, with double precision | |
1619 | const double currTime = current_dtime; | |
1620 | const double timePassed = currTime - prevTime; | |
1621 | ||
f33d34a8 | 1622 | // Calculate allowance for the time passed. Use double to avoid |
b4cd430a CT |
1623 | // accumulating rounding errors for small intervals. For example, always |
1624 | // adding 1 byte instead of 1.4 results in 29% bandwidth allocation error. | |
1625 | const double gain = timePassed * writeSpeedLimit; | |
1626 | ||
1627 | debugs(77,5, HERE << currTime << " clt" << (const char*)hash.key << ": " << | |
f33d34a8 A |
1628 | bucketSize << " + (" << timePassed << " * " << writeSpeedLimit << |
1629 | " = " << gain << ')'); | |
b4cd430a CT |
1630 | |
1631 | // to further combat error accumulation during micro updates, | |
1632 | // quit before updating time if we cannot add at least one byte | |
1633 | if (gain < 1.0) | |
f33d34a8 | 1634 | return; |
b4cd430a CT |
1635 | |
1636 | prevTime = currTime; | |
1637 | ||
1638 | // for "first" connections, drain initial fat before refilling but keep | |
1639 | // updating prevTime to avoid bursts after the fat is gone | |
1640 | if (bucketSize > bucketSizeLimit) { | |
f33d34a8 A |
1641 | debugs(77,4, HERE << "not refilling while draining initial fat"); |
1642 | return; | |
b4cd430a CT |
1643 | } |
1644 | ||
1645 | bucketSize += gain; | |
1646 | ||
1647 | // obey quota limits | |
1648 | if (bucketSize > bucketSizeLimit) | |
1649 | bucketSize = bucketSizeLimit; | |
1650 | } | |
1651 | ||
f33d34a8 | 1652 | void |
b4cd430a CT |
1653 | ClientInfo::setWriteLimiter(const int aWriteSpeedLimit, const double anInitialBurst, const double aHighWatermark) |
1654 | { | |
f33d34a8 A |
1655 | debugs(77,5, HERE << "Write limits for " << (const char*)hash.key << |
1656 | " speed=" << aWriteSpeedLimit << " burst=" << anInitialBurst << | |
1657 | " highwatermark=" << aHighWatermark); | |
b4cd430a CT |
1658 | |
1659 | // set or possibly update traffic shaping parameters | |
1660 | writeLimitingActive = true; | |
1661 | writeSpeedLimit = aWriteSpeedLimit; | |
1662 | bucketSizeLimit = aHighWatermark; | |
1663 | ||
1664 | // but some members should only be set once for a newly activated bucket | |
1665 | if (firstTimeConnection) { | |
1666 | firstTimeConnection = false; | |
1667 | ||
1668 | assert(!selectWaiting); | |
1669 | assert(!quotaQueue); | |
e9dadd7d | 1670 | quotaQueue = new CommQuotaQueue(this); |
b4cd430a CT |
1671 | |
1672 | bucketSize = anInitialBurst; | |
1673 | prevTime = current_dtime; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | CommQuotaQueue::CommQuotaQueue(ClientInfo *info): clientInfo(info), | |
f33d34a8 | 1678 | ins(0), outs(0) |
b4cd430a CT |
1679 | { |
1680 | assert(clientInfo); | |
1681 | } | |
1682 | ||
1683 | CommQuotaQueue::~CommQuotaQueue() | |
1684 | { | |
1685 | assert(!clientInfo); // ClientInfo should clear this before destroying us | |
1686 | } | |
1687 | ||
1688 | /// places the given fd at the end of the queue; returns reservation ID | |
1689 | unsigned int | |
1690 | CommQuotaQueue::enqueue(int fd) | |
1691 | { | |
1692 | debugs(77,5, HERE << "clt" << (const char*)clientInfo->hash.key << | |
f33d34a8 | 1693 | ": FD " << fd << " with qqid" << (ins+1) << ' ' << fds.size()); |
b4cd430a CT |
1694 | fds.push_back(fd); |
1695 | return ++ins; | |
1696 | } | |
1697 | ||
1698 | /// removes queue head | |
1699 | void | |
1700 | CommQuotaQueue::dequeue() | |
1701 | { | |
1702 | assert(!fds.empty()); | |
1703 | debugs(77,5, HERE << "clt" << (const char*)clientInfo->hash.key << | |
f33d34a8 A |
1704 | ": FD " << fds.front() << " with qqid" << (outs+1) << ' ' << |
1705 | fds.size()); | |
b4cd430a CT |
1706 | fds.pop_front(); |
1707 | ++outs; | |
1708 | } | |
b4cd430a CT |
1709 | #endif |
1710 | ||
89924214 | 1711 | /* |
1712 | * hm, this might be too general-purpose for all the places we'd | |
1713 | * like to use it. | |
1714 | */ | |
b224ea98 | 1715 | int |
e1381638 AJ |
1716 | ignoreErrno(int ierrno) |
1717 | { | |
603500e7 | 1718 | switch (ierrno) { |
62e76326 | 1719 | |
89924214 | 1720 | case EINPROGRESS: |
62e76326 | 1721 | |
603500e7 | 1722 | case EWOULDBLOCK: |
26a880e2 | 1723 | #if EAGAIN != EWOULDBLOCK |
62e76326 | 1724 | |
603500e7 | 1725 | case EAGAIN: |
26a880e2 | 1726 | #endif |
62e76326 | 1727 | |
603500e7 | 1728 | case EALREADY: |
62e76326 | 1729 | |
603500e7 | 1730 | case EINTR: |
db494ab8 | 1731 | #ifdef ERESTART |
62e76326 | 1732 | |
db494ab8 | 1733 | case ERESTART: |
1734 | #endif | |
62e76326 | 1735 | |
1736 | return 1; | |
1737 | ||
603500e7 | 1738 | default: |
62e76326 | 1739 | return 0; |
603500e7 | 1740 | } |
62e76326 | 1741 | |
603500e7 | 1742 | /* NOTREACHED */ |
26a880e2 | 1743 | } |
d723bf6b | 1744 | |
1745 | void | |
e1381638 AJ |
1746 | commCloseAllSockets(void) |
1747 | { | |
d723bf6b | 1748 | int fd; |
1749 | fde *F = NULL; | |
62e76326 | 1750 | |
95dc7ff4 | 1751 | for (fd = 0; fd <= Biggest_FD; ++fd) { |
62e76326 | 1752 | F = &fd_table[fd]; |
1753 | ||
1754 | if (!F->flags.open) | |
1755 | continue; | |
1756 | ||
1757 | if (F->type != FD_SOCKET) | |
1758 | continue; | |
1759 | ||
1760 | if (F->flags.ipc) /* don't close inter-process sockets */ | |
1761 | continue; | |
1762 | ||
b0469965 | 1763 | if (F->timeoutHandler != NULL) { |
1764 | AsyncCall::Pointer callback = F->timeoutHandler; | |
1765 | F->timeoutHandler = NULL; | |
bf8fe701 | 1766 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": Calling timeout handler"); |
9e008dda | 1767 | ScheduleCallHere(callback); |
62e76326 | 1768 | } else { |
468fe1b5 | 1769 | debugs(5, 5, "commCloseAllSockets: FD " << fd << ": calling comm_reset_close()"); |
5c336a3b | 1770 | old_comm_reset_close(fd); |
62e76326 | 1771 | } |
d723bf6b | 1772 | } |
1773 | } | |
1b3db6d9 | 1774 | |
2d8c0b1a | 1775 | static bool |
e1381638 AJ |
1776 | AlreadyTimedOut(fde *F) |
1777 | { | |
2d8c0b1a | 1778 | if (!F->flags.open) |
1779 | return true; | |
1780 | ||
1781 | if (F->timeout == 0) | |
1782 | return true; | |
1783 | ||
1784 | if (F->timeout > squid_curtime) | |
1785 | return true; | |
1786 | ||
1787 | return false; | |
1788 | } | |
1789 | ||
5ef5e5cc AJ |
1790 | static bool |
1791 | writeTimedOut(int fd) | |
1792 | { | |
ec41b64c | 1793 | if (!COMMIO_FD_WRITECB(fd)->active()) |
5ef5e5cc AJ |
1794 | return false; |
1795 | ||
1796 | if ((squid_curtime - fd_table[fd].writeStart) < Config.Timeout.write) | |
1797 | return false; | |
1798 | ||
1799 | return true; | |
1800 | } | |
1801 | ||
1b3db6d9 | 1802 | void |
e1381638 AJ |
1803 | checkTimeouts(void) |
1804 | { | |
1b3db6d9 | 1805 | int fd; |
1806 | fde *F = NULL; | |
b0469965 | 1807 | AsyncCall::Pointer callback; |
62e76326 | 1808 | |
95dc7ff4 | 1809 | for (fd = 0; fd <= Biggest_FD; ++fd) { |
62e76326 | 1810 | F = &fd_table[fd]; |
1811 | ||
5ef5e5cc AJ |
1812 | if (writeTimedOut(fd)) { |
1813 | // We have an active write callback and we are timed out | |
52f6ea9e | 1814 | debugs(5, 5, "checkTimeouts: FD " << fd << " auto write timeout"); |
d841c88d | 1815 | Comm::SetSelect(fd, COMM_SELECT_WRITE, NULL, NULL, 0); |
ec41b64c | 1816 | COMMIO_FD_WRITECB(fd)->finish(COMM_ERROR, ETIMEDOUT); |
307b696e | 1817 | } else if (AlreadyTimedOut(F)) |
62e76326 | 1818 | continue; |
1819 | ||
9e008dda | 1820 | debugs(5, 5, "checkTimeouts: FD " << fd << " Expired"); |
62e76326 | 1821 | |
b0469965 | 1822 | if (F->timeoutHandler != NULL) { |
bf8fe701 | 1823 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Call timeout handler"); |
b0469965 | 1824 | callback = F->timeoutHandler; |
1825 | F->timeoutHandler = NULL; | |
9e008dda | 1826 | ScheduleCallHere(callback); |
62e76326 | 1827 | } else { |
bf8fe701 | 1828 | debugs(5, 5, "checkTimeouts: FD " << fd << ": Forcing comm_close()"); |
62e76326 | 1829 | comm_close(fd); |
1830 | } | |
b5443c04 | 1831 | } |
1832 | } | |
1833 | ||
9e008dda AJ |
1834 | /// Start waiting for a possibly half-closed connection to close |
1835 | // by scheduling a read callback to a monitoring handler that | |
82ec8dfc | 1836 | // will close the connection on read errors. |
a46d2c0e | 1837 | void |
e1381638 AJ |
1838 | commStartHalfClosedMonitor(int fd) |
1839 | { | |
74257126 | 1840 | debugs(5, 5, HERE << "adding FD " << fd << " to " << *TheHalfClosed); |
82ec8dfc AR |
1841 | assert(isOpen(fd)); |
1842 | assert(!commHasHalfClosedMonitor(fd)); | |
74257126 AR |
1843 | (void)TheHalfClosed->add(fd); // could also assert the result |
1844 | commPlanHalfClosedCheck(); // may schedule check if we added the first FD | |
1845 | } | |
1846 | ||
1847 | static | |
1848 | void | |
e1381638 AJ |
1849 | commPlanHalfClosedCheck() |
1850 | { | |
74257126 AR |
1851 | if (!WillCheckHalfClosed && !TheHalfClosed->empty()) { |
1852 | eventAdd("commHalfClosedCheck", &commHalfClosedCheck, NULL, 1.0, 1); | |
1853 | WillCheckHalfClosed = true; | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | /// iterates over all descriptors that may need half-closed tests and | |
1858 | /// calls comm_read for those that do; re-schedules the check if needed | |
1859 | static | |
1860 | void | |
e1381638 AJ |
1861 | commHalfClosedCheck(void *) |
1862 | { | |
74257126 AR |
1863 | debugs(5, 5, HERE << "checking " << *TheHalfClosed); |
1864 | ||
1865 | typedef DescriptorSet::const_iterator DSCI; | |
1866 | const DSCI end = TheHalfClosed->end(); | |
1867 | for (DSCI i = TheHalfClosed->begin(); i != end; ++i) { | |
ec20038e AJ |
1868 | Comm::ConnectionPointer c = new Comm::Connection; // XXX: temporary. make HalfClosed a list of these. |
1869 | c->fd = *i; | |
1870 | if (!fd_table[c->fd].halfClosedReader) { // not reading already | |
74257126 | 1871 | AsyncCall::Pointer call = commCbCall(5,4, "commHalfClosedReader", |
9e008dda | 1872 | CommIoCbPtrFun(&commHalfClosedReader, NULL)); |
ec20038e AJ |
1873 | comm_read(c, NULL, 0, call); |
1874 | fd_table[c->fd].halfClosedReader = call; | |
1875 | } else | |
1876 | c->fd = -1; // XXX: temporary. prevent c replacement erase closing listed FD | |
74257126 | 1877 | } |
f900210a | 1878 | |
74257126 AR |
1879 | WillCheckHalfClosed = false; // as far as we know |
1880 | commPlanHalfClosedCheck(); // may need to check again | |
f900210a | 1881 | } |
1882 | ||
82ec8dfc AR |
1883 | /// checks whether we are waiting for possibly half-closed connection to close |
1884 | // We are monitoring if the read handler for the fd is the monitoring handler. | |
1885 | bool | |
e1381638 AJ |
1886 | commHasHalfClosedMonitor(int fd) |
1887 | { | |
74257126 | 1888 | return TheHalfClosed->has(fd); |
a46d2c0e | 1889 | } |
1890 | ||
82ec8dfc AR |
1891 | /// stop waiting for possibly half-closed connection to close |
1892 | static void | |
e1381638 AJ |
1893 | commStopHalfClosedMonitor(int const fd) |
1894 | { | |
74257126 AR |
1895 | debugs(5, 5, HERE << "removing FD " << fd << " from " << *TheHalfClosed); |
1896 | ||
1897 | // cancel the read if one was scheduled | |
1898 | AsyncCall::Pointer reader = fd_table[fd].halfClosedReader; | |
1899 | if (reader != NULL) | |
1900 | comm_read_cancel(fd, reader); | |
1901 | fd_table[fd].halfClosedReader = NULL; | |
1902 | ||
1903 | TheHalfClosed->del(fd); | |
a46d2c0e | 1904 | } |
1905 | ||
82ec8dfc AR |
1906 | /// I/O handler for the possibly half-closed connection monitoring code |
1907 | static void | |
e0d28505 | 1908 | commHalfClosedReader(const Comm::ConnectionPointer &conn, char *, size_t size, comm_err_t flag, int, void *) |
e1381638 | 1909 | { |
82ec8dfc | 1910 | // there cannot be more data coming in on half-closed connections |
9e008dda | 1911 | assert(size == 0); |
e0d28505 AJ |
1912 | assert(conn != NULL); |
1913 | assert(commHasHalfClosedMonitor(conn->fd)); // or we would have canceled the read | |
74257126 | 1914 | |
e0d28505 | 1915 | fd_table[conn->fd].halfClosedReader = NULL; // done reading, for now |
a46d2c0e | 1916 | |
82ec8dfc AR |
1917 | // nothing to do if fd is being closed |
1918 | if (flag == COMM_ERR_CLOSING) | |
1919 | return; | |
a46d2c0e | 1920 | |
82ec8dfc AR |
1921 | // if read failed, close the connection |
1922 | if (flag != COMM_OK) { | |
e0d28505 | 1923 | debugs(5, 3, HERE << "closing " << conn); |
80463bb4 | 1924 | conn->close(); |
82ec8dfc AR |
1925 | return; |
1926 | } | |
a46d2c0e | 1927 | |
82ec8dfc | 1928 | // continue waiting for close or error |
74257126 | 1929 | commPlanHalfClosedCheck(); // make sure this fd will be checked again |
a46d2c0e | 1930 | } |
a46d2c0e | 1931 | |
3e4bebf8 | 1932 | CommRead::CommRead() : conn(NULL), buf(NULL), len(0), callback(NULL) {} |
a46d2c0e | 1933 | |
3e4bebf8 AJ |
1934 | CommRead::CommRead(const Comm::ConnectionPointer &c, char *buf_, int len_, AsyncCall::Pointer &callback_) |
1935 | : conn(c), buf(buf_), len(len_), callback(callback_) {} | |
a46d2c0e | 1936 | |
a50bfe93 | 1937 | DeferredRead::DeferredRead () : theReader(NULL), theContext(NULL), theRead(), cancelled(false) {} |
a46d2c0e | 1938 | |
a50bfe93 | 1939 | DeferredRead::DeferredRead (DeferrableRead *aReader, void *data, CommRead const &aRead) : theReader(aReader), theContext (data), theRead(aRead), cancelled(false) {} |
a46d2c0e | 1940 | |
e1381638 AJ |
1941 | DeferredReadManager::~DeferredReadManager() |
1942 | { | |
a46d2c0e | 1943 | flushReads(); |
1944 | assert (deferredReads.empty()); | |
1945 | } | |
1946 | ||
97427e90 | 1947 | /* explicit instantiation required for some systems */ |
1948 | ||
63be0a78 | 1949 | /// \cond AUTODOCS-IGNORE |
2236466c | 1950 | template cbdata_type CbDataList<DeferredRead>::CBDATA_CbDataList; |
63be0a78 | 1951 | /// \endcond |
97427e90 | 1952 | |
a46d2c0e | 1953 | void |
e1381638 AJ |
1954 | DeferredReadManager::delayRead(DeferredRead const &aRead) |
1955 | { | |
3e4bebf8 | 1956 | debugs(5, 3, "Adding deferred read on " << aRead.theRead.conn); |
2236466c | 1957 | CbDataList<DeferredRead> *temp = deferredReads.push_back(aRead); |
2796c0d7 | 1958 | |
9e008dda | 1959 | // We have to use a global function as a closer and point to temp |
2796c0d7 AR |
1960 | // instead of "this" because DeferredReadManager is not a job and |
1961 | // is not even cbdata protected | |
575d05c4 | 1962 | // XXX: and yet we use cbdata protection functions on it?? |
2796c0d7 | 1963 | AsyncCall::Pointer closer = commCbCall(5,4, |
9e008dda AJ |
1964 | "DeferredReadManager::CloseHandler", |
1965 | CommCloseCbPtrFun(&CloseHandler, temp)); | |
3e4bebf8 | 1966 | comm_add_close_handler(aRead.theRead.conn->fd, closer); |
2796c0d7 | 1967 | temp->element.closer = closer; // remeber so that we can cancel |
a46d2c0e | 1968 | } |
1969 | ||
1970 | void | |
575d05c4 | 1971 | DeferredReadManager::CloseHandler(const CommCloseCbParams ¶ms) |
e1381638 | 1972 | { |
575d05c4 | 1973 | if (!cbdataReferenceValid(params.data)) |
a46d2c0e | 1974 | return; |
1975 | ||
575d05c4 | 1976 | CbDataList<DeferredRead> *temp = (CbDataList<DeferredRead> *)params.data; |
a46d2c0e | 1977 | |
2796c0d7 | 1978 | temp->element.closer = NULL; |
a46d2c0e | 1979 | temp->element.markCancelled(); |
1980 | } | |
1981 | ||
1982 | DeferredRead | |
e1381638 AJ |
1983 | DeferredReadManager::popHead(CbDataListContainer<DeferredRead> &deferredReads) |
1984 | { | |
a46d2c0e | 1985 | assert (!deferredReads.empty()); |
1986 | ||
2796c0d7 | 1987 | DeferredRead &read = deferredReads.head->element; |
e7e8ebdb AJ |
1988 | |
1989 | // NOTE: at this point the connection has been paused/stalled for an unknown | |
1990 | // amount of time. We must re-validate that it is active and usable. | |
1991 | ||
1992 | // If the connection has been closed already. Cancel this read. | |
1993 | if (!Comm::IsConnOpen(read.theRead.conn)) { | |
1994 | if (read.closer != NULL) { | |
1995 | read.closer->cancel("Connection closed before."); | |
1996 | read.closer = NULL; | |
1997 | } | |
1998 | read.markCancelled(); | |
1999 | } | |
2000 | ||
2796c0d7 | 2001 | if (!read.cancelled) { |
3e4bebf8 | 2002 | comm_remove_close_handler(read.theRead.conn->fd, read.closer); |
2796c0d7 AR |
2003 | read.closer = NULL; |
2004 | } | |
a46d2c0e | 2005 | |
2006 | DeferredRead result = deferredReads.pop_front(); | |
2007 | ||
2008 | return result; | |
2009 | } | |
2010 | ||
2011 | void | |
e1381638 AJ |
2012 | DeferredReadManager::kickReads(int const count) |
2013 | { | |
2236466c | 2014 | /* if we had CbDataList::size() we could consolidate this and flushReads */ |
a46d2c0e | 2015 | |
33cea91c | 2016 | if (count < 1) { |
a46d2c0e | 2017 | flushReads(); |
33cea91c | 2018 | return; |
2019 | } | |
a46d2c0e | 2020 | |
2021 | size_t remaining = count; | |
2022 | ||
2023 | while (!deferredReads.empty() && remaining) { | |
2024 | DeferredRead aRead = popHead(deferredReads); | |
2025 | kickARead(aRead); | |
2026 | ||
2027 | if (!aRead.cancelled) | |
2028 | --remaining; | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | void | |
e1381638 AJ |
2033 | DeferredReadManager::flushReads() |
2034 | { | |
2236466c | 2035 | CbDataListContainer<DeferredRead> reads; |
a46d2c0e | 2036 | reads = deferredReads; |
2236466c | 2037 | deferredReads = CbDataListContainer<DeferredRead>(); |
a46d2c0e | 2038 | |
27b24462 | 2039 | // XXX: For fairness this SHOULD randomize the order |
a46d2c0e | 2040 | while (!reads.empty()) { |
2041 | DeferredRead aRead = popHead(reads); | |
2042 | kickARead(aRead); | |
2043 | } | |
2044 | } | |
2045 | ||
2046 | void | |
e1381638 AJ |
2047 | DeferredReadManager::kickARead(DeferredRead const &aRead) |
2048 | { | |
a46d2c0e | 2049 | if (aRead.cancelled) |
2050 | return; | |
2051 | ||
3e4bebf8 | 2052 | if (Comm::IsConnOpen(aRead.theRead.conn) && fd_table[aRead.theRead.conn->fd].closing()) |
af6a12ee | 2053 | return; |
ed2c738b | 2054 | |
3e4bebf8 | 2055 | debugs(5, 3, "Kicking deferred read on " << aRead.theRead.conn); |
a46d2c0e | 2056 | |
2057 | aRead.theReader(aRead.theContext, aRead.theRead); | |
2058 | } | |
2059 | ||
2060 | void | |
e1381638 AJ |
2061 | DeferredRead::markCancelled() |
2062 | { | |
a46d2c0e | 2063 | cancelled = true; |
2064 | } | |
2d8c0b1a | 2065 | |
8ff3fa2e | 2066 | int |
e1381638 AJ |
2067 | CommSelectEngine::checkEvents(int timeout) |
2068 | { | |
fa3f745b | 2069 | static time_t last_timeout = 0; |
2070 | ||
2071 | /* No, this shouldn't be here. But it shouldn't be in each comm handler. -adrian */ | |
2072 | if (squid_curtime > last_timeout) { | |
2073 | last_timeout = squid_curtime; | |
2074 | checkTimeouts(); | |
2075 | } | |
2076 | ||
d841c88d | 2077 | switch (Comm::DoSelect(timeout)) { |
8ff3fa2e | 2078 | |
2079 | case COMM_OK: | |
2080 | ||
2081 | case COMM_TIMEOUT: | |
2082 | return 0; | |
2083 | ||
2084 | case COMM_IDLE: | |
2085 | ||
2086 | case COMM_SHUTDOWN: | |
2087 | return EVENT_IDLE; | |
2088 | ||
2089 | case COMM_ERROR: | |
2090 | return EVENT_ERROR; | |
2091 | ||
2092 | default: | |
2093 | fatal_dump("comm.cc: Internal error -- this should never happen."); | |
2094 | return EVENT_ERROR; | |
2095 | }; | |
2096 | } | |
10cefb7b | 2097 | |
0ffda73c | 2098 | /// Create a unix-domain socket (UDS) that only supports FD_MSGHDR I/O. |
10cefb7b | 2099 | int |
2100 | comm_open_uds(int sock_type, | |
2101 | int proto, | |
2102 | struct sockaddr_un* addr, | |
2103 | int flags) | |
2104 | { | |
a67d2b2e | 2105 | // TODO: merge with comm_openex() when Ip::Address becomes NetAddress |
ba568924 | 2106 | |
10cefb7b | 2107 | int new_socket; |
10cefb7b | 2108 | |
2109 | PROF_start(comm_open); | |
10cefb7b | 2110 | /* Create socket for accepting new connections. */ |
95dc7ff4 | 2111 | ++ statCounter.syscalls.sock.sockets; |
10cefb7b | 2112 | |
2113 | /* Setup the socket addrinfo details for use */ | |
ba568924 | 2114 | struct addrinfo AI; |
10cefb7b | 2115 | AI.ai_flags = 0; |
2116 | AI.ai_family = PF_UNIX; | |
2117 | AI.ai_socktype = sock_type; | |
2118 | AI.ai_protocol = proto; | |
2119 | AI.ai_addrlen = SUN_LEN(addr); | |
2120 | AI.ai_addr = (sockaddr*)addr; | |
2121 | AI.ai_canonname = NULL; | |
2122 | AI.ai_next = NULL; | |
2123 | ||
ba568924 | 2124 | debugs(50, 3, HERE << "Attempt open socket for: " << addr->sun_path); |
10cefb7b | 2125 | |
2126 | if ((new_socket = socket(AI.ai_family, AI.ai_socktype, AI.ai_protocol)) < 0) { | |
2127 | /* Increase the number of reserved fd's if calls to socket() | |
2128 | * are failing because the open file table is full. This | |
2129 | * limits the number of simultaneous clients */ | |
2130 | ||
2131 | if (limitError(errno)) { | |
ba568924 | 2132 | debugs(50, DBG_IMPORTANT, HERE << "socket failure: " << xstrerror()); |
10cefb7b | 2133 | fdAdjustReserved(); |
2134 | } else { | |
ba568924 | 2135 | debugs(50, DBG_CRITICAL, HERE << "socket failure: " << xstrerror()); |
10cefb7b | 2136 | } |
2137 | ||
2138 | PROF_stop(comm_open); | |
2139 | return -1; | |
2140 | } | |
2141 | ||
ba568924 | 2142 | debugs(50, 3, HERE "Opened UDS FD " << new_socket << " : family=" << AI.ai_family << ", type=" << AI.ai_socktype << ", protocol=" << AI.ai_protocol); |
10cefb7b | 2143 | |
2144 | /* update fdstat */ | |
ba568924 | 2145 | debugs(50, 5, HERE << "FD " << new_socket << " is a new socket"); |
10cefb7b | 2146 | |
2147 | assert(!isOpen(new_socket)); | |
1bac0258 | 2148 | fd_open(new_socket, FD_MSGHDR, NULL); |
10cefb7b | 2149 | |
2150 | fdd_table[new_socket].close_file = NULL; | |
ba568924 | 2151 | |
10cefb7b | 2152 | fdd_table[new_socket].close_line = 0; |
2153 | ||
ba568924 AR |
2154 | fd_table[new_socket].sock_family = AI.ai_family; |
2155 | ||
10cefb7b | 2156 | if (!(flags & COMM_NOCLOEXEC)) |
2157 | commSetCloseOnExec(new_socket); | |
2158 | ||
2159 | if (flags & COMM_REUSEADDR) | |
2160 | commSetReuseAddr(new_socket); | |
2161 | ||
2162 | if (flags & COMM_NONBLOCKING) { | |
2163 | if (commSetNonBlocking(new_socket) != COMM_OK) { | |
2164 | comm_close(new_socket); | |
2165 | PROF_stop(comm_open); | |
2166 | return -1; | |
2167 | } | |
2168 | } | |
2169 | ||
2170 | if (flags & COMM_DOBIND) { | |
2171 | if (commBind(new_socket, AI) != COMM_OK) { | |
2172 | comm_close(new_socket); | |
2173 | PROF_stop(comm_open); | |
2174 | return -1; | |
2175 | } | |
2176 | } | |
2177 | ||
2178 | #ifdef TCP_NODELAY | |
2179 | if (sock_type == SOCK_STREAM) | |
2180 | commSetTcpNoDelay(new_socket); | |
2181 | ||
2182 | #endif | |
2183 | ||
2184 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) | |
2185 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); | |
2186 | ||
2187 | PROF_stop(comm_open); | |
2188 | ||
2189 | return new_socket; | |
2190 | } |