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da2b3a17 | 1 | |
30a4f2a8 | 2 | /* |
a3fa14bf | 3 | * $Id: comm.cc,v 1.330 2002/04/18 16:09:37 hno 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 | * |
30a4f2a8 | 34 | */ |
090089c4 | 35 | |
44a47c6e | 36 | #include "squid.h" |
090089c4 | 37 | |
b671cc68 | 38 | #if defined(_SQUID_CYGWIN_) |
39 | #include <sys/ioctl.h> | |
40 | #endif | |
30a4f2a8 | 41 | #ifdef HAVE_NETINET_TCP_H |
42 | #include <netinet/tcp.h> | |
43 | #endif | |
090089c4 | 44 | |
f88211e8 | 45 | typedef struct { |
46 | char *host; | |
47 | u_short port; | |
48 | struct sockaddr_in S; | |
49 | CNCB *callback; | |
50 | void *data; | |
f88211e8 | 51 | struct in_addr in_addr; |
52 | int locks; | |
03a1ee42 | 53 | int fd; |
22c653cd | 54 | int tries; |
55 | int addrcount; | |
56 | int connstart; | |
f88211e8 | 57 | } ConnectStateData; |
58 | ||
090089c4 | 59 | /* STATIC */ |
f5b8bbc4 | 60 | static int commBind(int s, struct in_addr, u_short port); |
f5b8bbc4 | 61 | static void commSetReuseAddr(int); |
62 | static void commSetNoLinger(int); | |
f5b8bbc4 | 63 | static void CommWriteStateCallbackAndFree(int fd, int code); |
30a4f2a8 | 64 | #ifdef TCP_NODELAY |
f5b8bbc4 | 65 | static void commSetTcpNoDelay(int); |
30a4f2a8 | 66 | #endif |
f5b8bbc4 | 67 | static void commSetTcpRcvbuf(int, int); |
f88211e8 | 68 | static PF commConnectFree; |
03a1ee42 | 69 | static PF commConnectHandle; |
70 | static PF commHandleWrite; | |
edeb28fd | 71 | static IPH commConnectDnsHandle; |
f5b8bbc4 | 72 | static void commConnectCallback(ConnectStateData * cs, int status); |
22c653cd | 73 | static int commResetFD(ConnectStateData * cs); |
74 | static int commRetryConnect(ConnectStateData * cs); | |
28c60158 | 75 | CBDATA_TYPE(ConnectStateData); |
723123a9 | 76 | |
77 | static MemPool *comm_write_pool = NULL; | |
58cd5bbd | 78 | static MemPool *conn_close_pool = NULL; |
309ad3b6 | 79 | |
b8d8561b | 80 | static void |
f17936ab | 81 | CommWriteStateCallbackAndFree(int fd, int code) |
9864ee44 | 82 | { |
f17936ab | 83 | CommWriteStateData *CommWriteState = fd_table[fd].rwstate; |
84 | CWCB *callback = NULL; | |
fa80a8ef | 85 | void *cbdata; |
a56a3abe | 86 | fd_table[fd].rwstate = NULL; |
f17936ab | 87 | if (CommWriteState == NULL) |
9864ee44 | 88 | return; |
c0dec081 | 89 | if (CommWriteState->free_func) { |
729dd65c | 90 | FREE *free_func = CommWriteState->free_func; |
91 | void *free_buf = CommWriteState->buf; | |
92 | CommWriteState->free_func = NULL; | |
f17936ab | 93 | CommWriteState->buf = NULL; |
729dd65c | 94 | free_func(free_buf); |
9864ee44 | 95 | } |
f17936ab | 96 | callback = CommWriteState->handler; |
97 | CommWriteState->handler = NULL; | |
fa80a8ef | 98 | if (callback && cbdataReferenceValidDone(CommWriteState->handler_data, &cbdata)) |
99 | callback(fd, CommWriteState->buf, CommWriteState->offset, code, cbdata); | |
723123a9 | 100 | memPoolFree(comm_write_pool, CommWriteState); |
9864ee44 | 101 | } |
102 | ||
090089c4 | 103 | /* Return the local port associated with fd. */ |
b8d8561b | 104 | u_short |
105 | comm_local_port(int fd) | |
090089c4 | 106 | { |
107 | struct sockaddr_in addr; | |
6637e3a5 | 108 | socklen_t addr_len = 0; |
76f87348 | 109 | fde *F = &fd_table[fd]; |
090089c4 | 110 | |
090089c4 | 111 | /* If the fd is closed already, just return */ |
60c0b5a2 | 112 | if (!F->flags.open) { |
a3d5953d | 113 | debug(5, 0) ("comm_local_port: FD %d has been closed.\n", fd); |
30a4f2a8 | 114 | return 0; |
090089c4 | 115 | } |
76f87348 | 116 | if (F->local_port) |
117 | return F->local_port; | |
090089c4 | 118 | addr_len = sizeof(addr); |
119 | if (getsockname(fd, (struct sockaddr *) &addr, &addr_len)) { | |
a3d5953d | 120 | debug(50, 1) ("comm_local_port: Failed to retrieve TCP/UDP port number for socket: FD %d: %s\n", fd, xstrerror()); |
30a4f2a8 | 121 | return 0; |
090089c4 | 122 | } |
76f87348 | 123 | F->local_port = ntohs(addr.sin_port); |
5f6ac48b | 124 | debug(5, 6) ("comm_local_port: FD %d: port %d\n", fd, (int) F->local_port); |
76f87348 | 125 | return F->local_port; |
090089c4 | 126 | } |
127 | ||
b8d8561b | 128 | static int |
129 | commBind(int s, struct in_addr in_addr, u_short port) | |
090089c4 | 130 | { |
131 | struct sockaddr_in S; | |
090089c4 | 132 | |
090089c4 | 133 | memset(&S, '\0', sizeof(S)); |
134 | S.sin_family = AF_INET; | |
135 | S.sin_port = htons(port); | |
30a4f2a8 | 136 | S.sin_addr = in_addr; |
83704487 | 137 | statCounter.syscalls.sock.binds++; |
090089c4 | 138 | if (bind(s, (struct sockaddr *) &S, sizeof(S)) == 0) |
139 | return COMM_OK; | |
a3d5953d | 140 | debug(50, 0) ("commBind: Cannot bind socket FD %d to %s:%d: %s\n", |
090089c4 | 141 | s, |
30a4f2a8 | 142 | S.sin_addr.s_addr == INADDR_ANY ? "*" : inet_ntoa(S.sin_addr), |
44a62238 | 143 | (int) port, |
144 | xstrerror()); | |
090089c4 | 145 | return COMM_ERROR; |
146 | } | |
147 | ||
148 | /* Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
d6827718 | 149 | * is OR of flags specified in comm.h. Defaults TOS */ |
b8d8561b | 150 | int |
16b204c4 | 151 | comm_open(int sock_type, |
cc6a9d2e | 152 | int proto, |
153 | struct in_addr addr, | |
154 | u_short port, | |
155 | int flags, | |
0ee4272b | 156 | const char *note) |
d6827718 | 157 | { |
158 | return comm_openex(sock_type, proto, addr, port, flags, 0, note); | |
159 | } | |
160 | ||
161 | ||
162 | /* Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE | |
163 | * is OR of flags specified in defines.h:COMM_* */ | |
164 | int | |
165 | comm_openex(int sock_type, | |
166 | int proto, | |
167 | struct in_addr addr, | |
168 | u_short port, | |
169 | int flags, | |
170 | unsigned char TOS, | |
171 | const char *note) | |
090089c4 | 172 | { |
173 | int new_socket; | |
9056f553 | 174 | int tos = 0; |
76f87348 | 175 | fde *F = NULL; |
090089c4 | 176 | |
177 | /* Create socket for accepting new connections. */ | |
83704487 | 178 | statCounter.syscalls.sock.sockets++; |
16b204c4 | 179 | if ((new_socket = socket(AF_INET, sock_type, proto)) < 0) { |
090089c4 | 180 | /* Increase the number of reserved fd's if calls to socket() |
181 | * are failing because the open file table is full. This | |
182 | * limits the number of simultaneous clients */ | |
183 | switch (errno) { | |
184 | case ENFILE: | |
185 | case EMFILE: | |
a3d5953d | 186 | debug(50, 1) ("comm_open: socket failure: %s\n", xstrerror()); |
9bc73deb | 187 | fdAdjustReserved(); |
090089c4 | 188 | break; |
189 | default: | |
a3d5953d | 190 | debug(50, 0) ("comm_open: socket failure: %s\n", xstrerror()); |
090089c4 | 191 | } |
603a02fd | 192 | return -1; |
090089c4 | 193 | } |
d6827718 | 194 | /* set TOS if needed */ |
195 | if (TOS) { | |
196 | #ifdef IP_TOS | |
197 | tos = TOS; | |
198 | if (setsockopt(new_socket, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)) < 0) | |
199 | debug(50, 1) ("comm_open: setsockopt(IP_TOS) on FD %d: %s\n", | |
200 | new_socket, xstrerror()); | |
201 | #else | |
202 | debug(50, 0) ("comm_open: setsockopt(IP_TOS) not supported on this platform\n"); | |
203 | #endif | |
204 | } | |
090089c4 | 205 | /* update fdstat */ |
365e5b34 | 206 | debug(5, 5) ("comm_open: FD %d is a new socket\n", new_socket); |
5c5783a2 | 207 | fd_open(new_socket, FD_SOCKET, note); |
76f87348 | 208 | F = &fd_table[new_socket]; |
d6827718 | 209 | F->local_addr = addr; |
210 | F->tos = tos; | |
79a15e0a | 211 | if (!(flags & COMM_NOCLOEXEC)) |
3ca60c86 | 212 | commSetCloseOnExec(new_socket); |
cdc33f35 | 213 | if ((flags & COMM_REUSEADDR)) |
214 | commSetReuseAddr(new_socket); | |
7690e8eb | 215 | if (port > (u_short) 0) { |
30a4f2a8 | 216 | commSetNoLinger(new_socket); |
3b4be6a6 | 217 | if (opt_reuseaddr) |
090089c4 | 218 | commSetReuseAddr(new_socket); |
090089c4 | 219 | } |
a3724d50 | 220 | if (addr.s_addr != no_addr.s_addr) { |
221 | if (commBind(new_socket, addr, port) != COMM_OK) { | |
222 | comm_close(new_socket); | |
603a02fd | 223 | return -1; |
a3724d50 | 224 | } |
23ff6968 | 225 | } |
76f87348 | 226 | F->local_port = port; |
090089c4 | 227 | |
79a15e0a | 228 | if (flags & COMM_NONBLOCKING) |
30a4f2a8 | 229 | if (commSetNonBlocking(new_socket) == COMM_ERROR) |
603a02fd | 230 | return -1; |
30a4f2a8 | 231 | #ifdef TCP_NODELAY |
232 | if (sock_type == SOCK_STREAM) | |
233 | commSetTcpNoDelay(new_socket); | |
234 | #endif | |
1241e63e | 235 | if (Config.tcpRcvBufsz > 0 && sock_type == SOCK_STREAM) |
236 | commSetTcpRcvbuf(new_socket, Config.tcpRcvBufsz); | |
090089c4 | 237 | return new_socket; |
238 | } | |
239 | ||
b4ea1f2e | 240 | /* |
241 | * NOTE: set the listen queue to Squid_MaxFD/4 and rely on the kernel to | |
242 | * impose an upper limit. Solaris' listen(3n) page says it has | |
243 | * no limit on this parameter, but sys/socket.h sets SOMAXCONN | |
244 | * to 5. HP-UX currently has a limit of 20. SunOS is 5 and | |
245 | * OSF 3.0 is 8. | |
246 | */ | |
b8d8561b | 247 | int |
248 | comm_listen(int sock) | |
090089c4 | 249 | { |
250 | int x; | |
e83892e9 | 251 | if ((x = listen(sock, Squid_MaxFD >> 2)) < 0) { |
a3d5953d | 252 | debug(50, 0) ("comm_listen: listen(%d, %d): %s\n", |
e83892e9 | 253 | Squid_MaxFD >> 2, |
090089c4 | 254 | sock, xstrerror()); |
255 | return x; | |
256 | } | |
257 | return sock; | |
258 | } | |
259 | ||
e5f6c5c2 | 260 | void |
4f92c80c | 261 | commConnectStart(int fd, const char *host, u_short port, CNCB * callback, void *data) |
e924600d | 262 | { |
28c60158 | 263 | ConnectStateData *cs; |
6a988308 | 264 | debug(5, 3) ("commConnectStart: FD %d, %s:%d\n", fd, host, (int) port); |
72711e31 | 265 | cs = cbdataAlloc(ConnectStateData); |
03a1ee42 | 266 | cs->fd = fd; |
e924600d | 267 | cs->host = xstrdup(host); |
268 | cs->port = port; | |
269 | cs->callback = callback; | |
fa80a8ef | 270 | cs->data = cbdataReference(data); |
e924600d | 271 | comm_add_close_handler(fd, commConnectFree, cs); |
f88211e8 | 272 | cs->locks++; |
8407afee | 273 | ipcache_nbgethostbyname(host, commConnectDnsHandle, cs); |
edeb28fd | 274 | } |
275 | ||
276 | static void | |
03a1ee42 | 277 | commConnectDnsHandle(const ipcache_addrs * ia, void *data) |
edeb28fd | 278 | { |
279 | ConnectStateData *cs = data; | |
f88211e8 | 280 | assert(cs->locks == 1); |
281 | cs->locks--; | |
edeb28fd | 282 | if (ia == NULL) { |
a3d5953d | 283 | debug(5, 3) ("commConnectDnsHandle: Unknown host: %s\n", cs->host); |
6cf028ab | 284 | if (!dns_error_message) { |
285 | dns_error_message = "Unknown DNS error"; | |
0e473d70 | 286 | debug(5, 1) ("commConnectDnsHandle: Bad dns_error_message\n"); |
6cf028ab | 287 | } |
a64c2869 | 288 | assert(dns_error_message != NULL); |
03a1ee42 | 289 | commConnectCallback(cs, COMM_ERR_DNS); |
edeb28fd | 290 | return; |
291 | } | |
f076b37b | 292 | assert(ia->cur < ia->count); |
edeb28fd | 293 | cs->in_addr = ia->in_addrs[ia->cur]; |
52926044 | 294 | ipcacheCycleAddr(cs->host, NULL); |
22c653cd | 295 | cs->addrcount = ia->count; |
296 | cs->connstart = squid_curtime; | |
03a1ee42 | 297 | commConnectHandle(cs->fd, cs); |
e924600d | 298 | } |
299 | ||
f88211e8 | 300 | static void |
03a1ee42 | 301 | commConnectCallback(ConnectStateData * cs, int status) |
f88211e8 | 302 | { |
a3d5953d | 303 | CNCB *callback = cs->callback; |
fa80a8ef | 304 | void *cbdata = cs->data; |
03a1ee42 | 305 | int fd = cs->fd; |
a3d5953d | 306 | comm_remove_close_handler(fd, commConnectFree, cs); |
9daca08e | 307 | cs->callback = NULL; |
308 | cs->data = NULL; | |
e1b16349 | 309 | commSetTimeout(fd, -1, NULL, NULL); |
a3d5953d | 310 | commConnectFree(fd, cs); |
fa80a8ef | 311 | if (cbdataReferenceValid(cbdata)) |
312 | callback(fd, status, cbdata); | |
f88211e8 | 313 | } |
314 | ||
e924600d | 315 | static void |
9daca08e | 316 | commConnectFree(int fd, void *data) |
e924600d | 317 | { |
318 | ConnectStateData *cs = data; | |
9daca08e | 319 | debug(5, 3) ("commConnectFree: FD %d\n", fd); |
fa80a8ef | 320 | cbdataReferenceDone(cs->data); |
8407afee | 321 | safe_free(cs->host); |
322 | cbdataFree(cs); | |
e924600d | 323 | } |
324 | ||
22c653cd | 325 | /* Reset FD so that we can connect() again */ |
edeb28fd | 326 | static int |
22c653cd | 327 | commResetFD(ConnectStateData * cs) |
edeb28fd | 328 | { |
329 | int fd2; | |
d6827718 | 330 | fde *F; |
fa80a8ef | 331 | if (!cbdataReferenceValid(cs->data)) |
7dd44885 | 332 | return 0; |
83704487 | 333 | statCounter.syscalls.sock.sockets++; |
edeb28fd | 334 | fd2 = socket(AF_INET, SOCK_STREAM, 0); |
83704487 | 335 | statCounter.syscalls.sock.sockets++; |
edeb28fd | 336 | if (fd2 < 0) { |
22c653cd | 337 | debug(5, 0) ("commResetFD: socket: %s\n", xstrerror()); |
9bc73deb | 338 | if (ENFILE == errno || EMFILE == errno) |
339 | fdAdjustReserved(); | |
edeb28fd | 340 | return 0; |
341 | } | |
22c653cd | 342 | if (dup2(fd2, cs->fd) < 0) { |
343 | debug(5, 0) ("commResetFD: dup2: %s\n", xstrerror()); | |
9bc73deb | 344 | if (ENFILE == errno || EMFILE == errno) |
345 | fdAdjustReserved(); | |
d6827718 | 346 | close(fd2); |
edeb28fd | 347 | return 0; |
348 | } | |
edeb28fd | 349 | close(fd2); |
d6827718 | 350 | F = &fd_table[cs->fd]; |
b5568a61 | 351 | fd_table[cs->fd].flags.called_connect = 0; |
09544acc | 352 | /* |
353 | * yuck, this has assumptions about comm_open() arguments for | |
354 | * the original socket | |
355 | */ | |
d6827718 | 356 | if (commBind(cs->fd, F->local_addr, F->local_port) != COMM_OK) { |
357 | debug(5, 0) ("commResetFD: bind: %s\n", xstrerror()); | |
358 | return 0; | |
09544acc | 359 | } |
d6827718 | 360 | #ifdef IP_TOS |
361 | if (F->tos) { | |
362 | int tos = F->tos; | |
363 | if (setsockopt(cs->fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)) < 0) | |
364 | debug(50, 1) ("commResetFD: setsockopt(IP_TOS) on FD %d: %s\n", cs->fd, xstrerror()); | |
365 | } | |
366 | #endif | |
367 | if (F->flags.close_on_exec) | |
368 | commSetCloseOnExec(cs->fd); | |
369 | if (F->flags.nonblocking) | |
370 | commSetNonBlocking(cs->fd); | |
09544acc | 371 | #ifdef TCP_NODELAY |
d6827718 | 372 | if (F->flags.nodelay) |
373 | commSetTcpNoDelay(cs->fd); | |
09544acc | 374 | #endif |
375 | if (Config.tcpRcvBufsz > 0) | |
376 | commSetTcpRcvbuf(cs->fd, Config.tcpRcvBufsz); | |
edeb28fd | 377 | return 1; |
378 | } | |
379 | ||
22c653cd | 380 | static int |
381 | commRetryConnect(ConnectStateData * cs) | |
382 | { | |
383 | assert(cs->addrcount > 0); | |
384 | if (cs->addrcount == 1) { | |
385 | if (cs->tries >= Config.retry.maxtries) | |
386 | return 0; | |
387 | if (squid_curtime - cs->connstart > Config.Timeout.connect) | |
388 | return 0; | |
22c653cd | 389 | } else { |
390 | if (cs->tries > cs->addrcount) | |
391 | return 0; | |
392 | } | |
393 | return commResetFD(cs); | |
394 | } | |
395 | ||
e924600d | 396 | /* Connect SOCK to specified DEST_PORT at DEST_HOST. */ |
397 | static void | |
398 | commConnectHandle(int fd, void *data) | |
090089c4 | 399 | { |
f88211e8 | 400 | ConnectStateData *cs = data; |
401 | if (cs->S.sin_addr.s_addr == 0) { | |
402 | cs->S.sin_family = AF_INET; | |
403 | cs->S.sin_addr = cs->in_addr; | |
404 | cs->S.sin_port = htons(cs->port); | |
17a0a4ee | 405 | if (Config.onoff.log_fqdn) |
f88211e8 | 406 | fqdncache_gethostbyaddr(cs->S.sin_addr, FQDN_LOOKUP_IF_MISS); |
e5f6c5c2 | 407 | } |
f88211e8 | 408 | switch (comm_connect_addr(fd, &cs->S)) { |
e5f6c5c2 | 409 | case COMM_INPROGRESS: |
11994bb9 | 410 | debug(5, 5) ("commConnectHandle: FD %d: COMM_INPROGRESS\n", fd); |
f88211e8 | 411 | commSetSelect(fd, COMM_SELECT_WRITE, commConnectHandle, cs, 0); |
e5f6c5c2 | 412 | break; |
413 | case COMM_OK: | |
22c653cd | 414 | ipcacheMarkGoodAddr(cs->host, cs->S.sin_addr); |
03a1ee42 | 415 | commConnectCallback(cs, COMM_OK); |
e5f6c5c2 | 416 | break; |
417 | default: | |
22c653cd | 418 | cs->tries++; |
419 | ipcacheMarkBadAddr(cs->host, cs->S.sin_addr); | |
194dd3b8 | 420 | if (Config.onoff.test_reachability) |
421 | netdbDeleteAddrNetwork(cs->S.sin_addr); | |
22c653cd | 422 | if (commRetryConnect(cs)) { |
f88211e8 | 423 | cs->locks++; |
8407afee | 424 | ipcache_nbgethostbyname(cs->host, commConnectDnsHandle, cs); |
edeb28fd | 425 | } else { |
03a1ee42 | 426 | commConnectCallback(cs, COMM_ERR_CONNECT); |
edeb28fd | 427 | } |
e5f6c5c2 | 428 | break; |
090089c4 | 429 | } |
090089c4 | 430 | } |
22c653cd | 431 | |
b8d8561b | 432 | int |
4f92c80c | 433 | commSetTimeout(int fd, int timeout, PF * handler, void *data) |
090089c4 | 434 | { |
76f87348 | 435 | fde *F; |
a3d5953d | 436 | debug(5, 3) ("commSetTimeout: FD %d timeout %d\n", fd, timeout); |
03eb2f01 | 437 | assert(fd >= 0); |
438 | assert(fd < Squid_MaxFD); | |
76f87348 | 439 | F = &fd_table[fd]; |
60c0b5a2 | 440 | assert(F->flags.open); |
5c5783a2 | 441 | if (timeout < 0) { |
a3fa14bf | 442 | cbdataReferenceDone(F->timeout_data); |
76f87348 | 443 | F->timeout_handler = NULL; |
a3fa14bf | 444 | F->timeout = 0; |
445 | return F->timeout; | |
5c5783a2 | 446 | } |
76f87348 | 447 | assert(handler || F->timeout_handler); |
5c5783a2 | 448 | if (handler || data) { |
a3fa14bf | 449 | /* new timeout handler installed. If NULL then the timeout |
450 | * is only extended | |
451 | */ | |
452 | cbdataReferenceDone(F->timeout_data); | |
76f87348 | 453 | F->timeout_handler = handler; |
fa80a8ef | 454 | F->timeout_data = cbdataReference(data); |
30a4f2a8 | 455 | } |
a3fa14bf | 456 | F->timeout = squid_curtime + (time_t) timeout; |
457 | return F->timeout; | |
090089c4 | 458 | } |
459 | ||
b8d8561b | 460 | int |
0ee4272b | 461 | comm_connect_addr(int sock, const struct sockaddr_in *address) |
090089c4 | 462 | { |
463 | int status = COMM_OK; | |
76f87348 | 464 | fde *F = &fd_table[sock]; |
090089c4 | 465 | int x; |
b5568a61 | 466 | int err = 0; |
9689d97c | 467 | socklen_t errlen; |
489b22c1 | 468 | assert(ntohs(address->sin_port) != 0); |
090089c4 | 469 | /* Establish connection. */ |
b5568a61 | 470 | errno = 0; |
471 | if (!F->flags.called_connect) { | |
472 | F->flags.called_connect = 1; | |
83704487 | 473 | statCounter.syscalls.sock.connects++; |
b5568a61 | 474 | x = connect(sock, (struct sockaddr *) address, sizeof(*address)); |
54f742e7 | 475 | if (x < 0) |
476 | debug(5, 9) ("connect FD %d: %s\n", sock, xstrerror()); | |
b5568a61 | 477 | } else { |
140e2c0b | 478 | #if defined(_SQUID_NEWSOS6_) |
33ac9442 | 479 | /* Makoto MATSUSHITA <matusita@ics.es.osaka-u.ac.jp> */ |
480 | connect(sock, (struct sockaddr *) address, sizeof(*address)); | |
481 | if (errno == EINVAL) { | |
482 | errlen = sizeof(err); | |
483 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
484 | if (x >= 0) | |
485 | errno = x; | |
486 | } | |
487 | #else | |
b5568a61 | 488 | errlen = sizeof(err); |
489 | x = getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &errlen); | |
490 | if (x == 0) | |
491 | errno = err; | |
492 | #if defined(_SQUID_SOLARIS_) | |
493 | /* | |
494 | * Solaris 2.4's socket emulation doesn't allow you | |
495 | * to determine the error from a failed non-blocking | |
496 | * connect and just returns EPIPE. Create a fake | |
497 | * error message for connect. -- fenner@parc.xerox.com | |
498 | */ | |
499 | if (x < 0 && errno == EPIPE) | |
500 | errno = ENOTCONN; | |
33ac9442 | 501 | #endif |
30a4f2a8 | 502 | #endif |
e5f6c5c2 | 503 | } |
b5568a61 | 504 | if (errno == 0 || errno == EISCONN) |
505 | status = COMM_OK; | |
506 | else if (ignoreErrno(errno)) | |
507 | status = COMM_INPROGRESS; | |
508 | else | |
509 | return COMM_ERROR; | |
76f87348 | 510 | xstrncpy(F->ipaddr, inet_ntoa(address->sin_addr), 16); |
511 | F->remote_port = ntohs(address->sin_port); | |
090089c4 | 512 | if (status == COMM_OK) { |
a3d5953d | 513 | debug(5, 10) ("comm_connect_addr: FD %d connected to %s:%d\n", |
76f87348 | 514 | sock, F->ipaddr, F->remote_port); |
f21cd581 | 515 | } else if (status == COMM_INPROGRESS) { |
a3d5953d | 516 | debug(5, 10) ("comm_connect_addr: FD %d connection pending\n", sock); |
090089c4 | 517 | } |
090089c4 | 518 | return status; |
519 | } | |
520 | ||
521 | /* Wait for an incoming connection on FD. FD should be a socket returned | |
522 | * from comm_listen. */ | |
b8d8561b | 523 | int |
9ef28b60 | 524 | comm_accept(int fd, struct sockaddr_in *pn, struct sockaddr_in *me) |
090089c4 | 525 | { |
526 | int sock; | |
1f9afe33 | 527 | struct sockaddr_in P; |
528 | struct sockaddr_in M; | |
6637e3a5 | 529 | socklen_t Slen; |
76f87348 | 530 | fde *F = NULL; |
1f9afe33 | 531 | Slen = sizeof(P); |
83704487 | 532 | statCounter.syscalls.sock.accepts++; |
603500e7 | 533 | if ((sock = accept(fd, (struct sockaddr *) &P, &Slen)) < 0) { |
534 | if (ignoreErrno(errno)) { | |
535 | debug(50, 5) ("comm_accept: FD %d: %s\n", fd, xstrerror()); | |
0a0bf5db | 536 | return COMM_NOMESSAGE; |
603500e7 | 537 | } else if (ENFILE == errno || EMFILE == errno) { |
538 | debug(50, 3) ("comm_accept: FD %d: %s\n", fd, xstrerror()); | |
090089c4 | 539 | return COMM_ERROR; |
603500e7 | 540 | } else { |
541 | debug(50, 1) ("comm_accept: FD %d: %s\n", fd, xstrerror()); | |
090089c4 | 542 | return COMM_ERROR; |
543 | } | |
544 | } | |
9ef28b60 | 545 | if (pn) |
546 | *pn = P; | |
4053a845 | 547 | Slen = sizeof(M); |
548 | memset(&M, '\0', Slen); | |
549 | getsockname(sock, (struct sockaddr *) &M, &Slen); | |
550 | if (me) | |
1f9afe33 | 551 | *me = M; |
3ca60c86 | 552 | commSetCloseOnExec(sock); |
090089c4 | 553 | /* fdstat update */ |
5c5783a2 | 554 | fd_open(sock, FD_SOCKET, "HTTP Request"); |
76f87348 | 555 | F = &fd_table[sock]; |
c0dec081 | 556 | xstrncpy(F->ipaddr, inet_ntoa(P.sin_addr), 16); |
76f87348 | 557 | F->remote_port = htons(P.sin_port); |
558 | F->local_port = htons(M.sin_port); | |
090089c4 | 559 | commSetNonBlocking(sock); |
090089c4 | 560 | return sock; |
561 | } | |
562 | ||
cb201b7e | 563 | void |
564 | commCallCloseHandlers(int fd) | |
565 | { | |
76f87348 | 566 | fde *F = &fd_table[fd]; |
f1dc9b30 | 567 | close_handler *ch; |
a3d5953d | 568 | debug(5, 5) ("commCallCloseHandlers: FD %d\n", fd); |
76f87348 | 569 | while ((ch = F->close_handler) != NULL) { |
570 | F->close_handler = ch->next; | |
9daca08e | 571 | debug(5, 5) ("commCallCloseHandlers: ch->handler=%p\n", ch->handler); |
fa80a8ef | 572 | if (cbdataReferenceValid(ch->data)) |
603a02fd | 573 | ch->handler(fd, ch->data); |
fa80a8ef | 574 | cbdataReferenceDone(ch->data); |
7f6ffd15 | 575 | memPoolFree(conn_close_pool, ch); /* AAA */ |
cb201b7e | 576 | } |
577 | } | |
578 | ||
5492ad1d | 579 | #if LINGERING_CLOSE |
580 | static void | |
581 | commLingerClose(int fd, void *unused) | |
582 | { | |
583 | LOCAL_ARRAY(char, buf, 1024); | |
584 | int n; | |
1f7c9178 | 585 | n = FD_READ_METHOD(fd, buf, 1024); |
5492ad1d | 586 | if (n < 0) |
587 | debug(5, 3) ("commLingerClose: FD %d read: %s\n", fd, xstrerror()); | |
588 | comm_close(fd); | |
589 | } | |
590 | ||
591 | static void | |
592 | commLingerTimeout(int fd, void *unused) | |
593 | { | |
594 | debug(5, 3) ("commLingerTimeout: FD %d\n", fd); | |
595 | comm_close(fd); | |
596 | } | |
597 | ||
598 | /* | |
599 | * Inspired by apache | |
600 | */ | |
601 | void | |
602 | comm_lingering_close(int fd) | |
603 | { | |
d4c19b39 | 604 | #if USE_SSL |
605 | if (fd_table[fd].ssl) | |
79d4ccdf | 606 | ssl_shutdown_method(fd); |
d4c19b39 | 607 | #endif |
5492ad1d | 608 | if (shutdown(fd, 1) < 0) { |
609 | comm_close(fd); | |
610 | return; | |
611 | } | |
612 | fd_note(fd, "lingering close"); | |
613 | commSetTimeout(fd, 10, commLingerTimeout, NULL); | |
614 | commSetSelect(fd, COMM_SELECT_READ, commLingerClose, NULL, 0); | |
615 | } | |
616 | #endif | |
617 | ||
98264874 | 618 | /* |
619 | * enable linger with time of 0 so that when the socket is | |
620 | * closed, TCP generates a RESET | |
621 | */ | |
622 | void | |
623 | comm_reset_close(int fd) | |
624 | { | |
625 | struct linger L; | |
626 | L.l_onoff = 1; | |
627 | L.l_linger = 0; | |
628 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) | |
629 | debug(50, 0) ("commResetTCPClose: FD %d: %s\n", fd, xstrerror()); | |
630 | comm_close(fd); | |
631 | } | |
632 | ||
b8d8561b | 633 | void |
634 | comm_close(int fd) | |
090089c4 | 635 | { |
76f87348 | 636 | fde *F = NULL; |
1f7c9178 | 637 | |
a3d5953d | 638 | debug(5, 5) ("comm_close: FD %d\n", fd); |
03eb2f01 | 639 | assert(fd >= 0); |
640 | assert(fd < Squid_MaxFD); | |
76f87348 | 641 | F = &fd_table[fd]; |
1f7c9178 | 642 | |
58a6c186 | 643 | if (F->flags.closing) |
e102ebda | 644 | return; |
60c0b5a2 | 645 | if (shutting_down && (!F->flags.open || F->type == FD_FILE)) |
6cf028ab | 646 | return; |
60c0b5a2 | 647 | assert(F->flags.open); |
76f87348 | 648 | assert(F->type != FD_FILE); |
58a6c186 | 649 | F->flags.closing = 1; |
d4c19b39 | 650 | #if USE_SSL |
651 | if (F->ssl) | |
79d4ccdf | 652 | ssl_shutdown_method(fd); |
d4c19b39 | 653 | #endif |
fa80a8ef | 654 | commSetTimeout(fd, -1, NULL, NULL); |
96f1be5d | 655 | CommWriteStateCallbackAndFree(fd, COMM_ERR_CLOSING); |
cb201b7e | 656 | commCallCloseHandlers(fd); |
b716a8ad | 657 | if (F->uses) /* assume persistent connect count */ |
658 | pconnHistCount(1, F->uses); | |
d4c19b39 | 659 | #if USE_SSL |
660 | if (F->ssl) { | |
661 | SSL_free(F->ssl); | |
662 | F->ssl = NULL; | |
663 | } | |
664 | #endif | |
5c5783a2 | 665 | fd_close(fd); /* update fdstat */ |
5874bf28 | 666 | close(fd); |
83704487 | 667 | statCounter.syscalls.sock.closes++; |
090089c4 | 668 | } |
669 | ||
090089c4 | 670 | /* Send a udp datagram to specified TO_ADDR. */ |
b8d8561b | 671 | int |
5df61230 | 672 | comm_udp_sendto(int fd, |
673 | const struct sockaddr_in *to_addr, | |
674 | int addr_len, | |
17b6e784 | 675 | const void *buf, |
5df61230 | 676 | int len) |
090089c4 | 677 | { |
5df61230 | 678 | int x; |
83704487 | 679 | statCounter.syscalls.sock.sendtos++; |
5df61230 | 680 | x = sendto(fd, buf, len, 0, (struct sockaddr *) to_addr, addr_len); |
681 | if (x < 0) { | |
17d51783 | 682 | #ifdef _SQUID_LINUX_ |
683 | if (ECONNREFUSED != errno) | |
684 | #endif | |
685 | debug(50, 1) ("comm_udp_sendto: FD %d, %s, port %d: %s\n", | |
686 | fd, | |
687 | inet_ntoa(to_addr->sin_addr), | |
688 | (int) htons(to_addr->sin_port), | |
689 | xstrerror()); | |
090089c4 | 690 | return COMM_ERROR; |
691 | } | |
5df61230 | 692 | return x; |
090089c4 | 693 | } |
694 | ||
b8d8561b | 695 | void |
70a9dab4 | 696 | commSetDefer(int fd, DEFER * func, void *data) |
4883993a | 697 | { |
da2b3a17 | 698 | fde *F = &fd_table[fd]; |
699 | F->defer_check = func; | |
70a9dab4 | 700 | F->defer_data = data; |
4883993a | 701 | } |
702 | ||
b8d8561b | 703 | void |
582b6456 | 704 | comm_add_close_handler(int fd, PF * handler, void *data) |
30a4f2a8 | 705 | { |
7f6ffd15 | 706 | close_handler *new = memPoolAlloc(conn_close_pool); /* AAA */ |
cddc721b | 707 | close_handler *c; |
a3d5953d | 708 | debug(5, 5) ("comm_add_close_handler: FD %d, handler=%p, data=%p\n", |
e0c42e90 | 709 | fd, handler, data); |
6a988308 | 710 | for (c = fd_table[fd].close_handler; c; c = c->next) |
aeca2a09 | 711 | assert(c->handler != handler || c->data != data); |
30a4f2a8 | 712 | new->handler = handler; |
fa80a8ef | 713 | new->data = cbdataReference(data); |
30a4f2a8 | 714 | new->next = fd_table[fd].close_handler; |
715 | fd_table[fd].close_handler = new; | |
716 | } | |
717 | ||
b8d8561b | 718 | void |
582b6456 | 719 | comm_remove_close_handler(int fd, PF * handler, void *data) |
090089c4 | 720 | { |
f1dc9b30 | 721 | close_handler *p; |
722 | close_handler *last = NULL; | |
30a4f2a8 | 723 | /* Find handler in list */ |
e869f2bd | 724 | debug(5, 5) ("comm_remove_close_handler: FD %d, handler=%p, data=%p\n", |
725 | fd, handler, data); | |
30a4f2a8 | 726 | for (p = fd_table[fd].close_handler; p != NULL; last = p, p = p->next) |
727 | if (p->handler == handler && p->data == data) | |
728 | break; /* This is our handler */ | |
f88211e8 | 729 | assert(p != NULL); |
30a4f2a8 | 730 | /* Remove list entry */ |
731 | if (last) | |
732 | last->next = p->next; | |
733 | else | |
734 | fd_table[fd].close_handler = p->next; | |
fa80a8ef | 735 | cbdataReferenceDone(p->data); |
736 | memPoolFree(conn_close_pool, p); | |
30a4f2a8 | 737 | } |
090089c4 | 738 | |
b8d8561b | 739 | static void |
740 | commSetNoLinger(int fd) | |
30a4f2a8 | 741 | { |
742 | struct linger L; | |
090089c4 | 743 | L.l_onoff = 0; /* off */ |
744 | L.l_linger = 0; | |
30a4f2a8 | 745 | if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &L, sizeof(L)) < 0) |
a3d5953d | 746 | debug(50, 0) ("commSetNoLinger: FD %d: %s\n", fd, xstrerror()); |
58a6c186 | 747 | fd_table[fd].flags.nolinger = 1; |
090089c4 | 748 | } |
749 | ||
b8d8561b | 750 | static void |
751 | commSetReuseAddr(int fd) | |
090089c4 | 752 | { |
753 | int on = 1; | |
30a4f2a8 | 754 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0) |
a3d5953d | 755 | debug(50, 1) ("commSetReuseAddr: FD %d: %s\n", fd, xstrerror()); |
090089c4 | 756 | } |
757 | ||
b8d8561b | 758 | static void |
759 | commSetTcpRcvbuf(int fd, int size) | |
f868539a | 760 | { |
761 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size)) < 0) | |
a3d5953d | 762 | debug(50, 1) ("commSetTcpRcvbuf: FD %d, SIZE %d: %s\n", |
b6f794d6 | 763 | fd, size, xstrerror()); |
f868539a | 764 | } |
765 | ||
b8d8561b | 766 | int |
767 | commSetNonBlocking(int fd) | |
30a4f2a8 | 768 | { |
731e4d49 | 769 | int flags; |
9e205701 | 770 | int dummy = 0; |
7f6ffd15 | 771 | #ifdef _SQUID_CYGWIN_ |
b05490a8 | 772 | int nonblocking = TRUE; |
7f6ffd15 | 773 | if (fd_table[fd].type != FD_PIPE) { |
774 | if (ioctl(fd, FIONBIO, &nonblocking) < 0) { | |
775 | debug(50, 0) ("commSetNonBlocking: FD %d: %s %D\n", fd, xstrerror(), fd_table[fd].type); | |
776 | return COMM_ERROR; | |
777 | } | |
778 | } else { | |
779 | #endif | |
780 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
781 | debug(50, 0) ("FD %d: fcntl F_GETFL: %s\n", fd, xstrerror()); | |
782 | return COMM_ERROR; | |
783 | } | |
784 | if (fcntl(fd, F_SETFL, flags | SQUID_NONBLOCK) < 0) { | |
785 | debug(50, 0) ("commSetNonBlocking: FD %d: %s\n", fd, xstrerror()); | |
786 | return COMM_ERROR; | |
787 | } | |
788 | #ifdef _SQUID_CYGWIN_ | |
090089c4 | 789 | } |
7f6ffd15 | 790 | #endif |
58a6c186 | 791 | fd_table[fd].flags.nonblocking = 1; |
090089c4 | 792 | return 0; |
793 | } | |
794 | ||
7e3ce7b9 | 795 | int |
796 | commUnsetNonBlocking(int fd) | |
797 | { | |
798 | int flags; | |
799 | int dummy = 0; | |
800 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { | |
801 | debug(50, 0) ("FD %d: fcntl F_GETFL: %s\n", fd, xstrerror()); | |
802 | return COMM_ERROR; | |
803 | } | |
804 | if (fcntl(fd, F_SETFL, flags & (~SQUID_NONBLOCK)) < 0) { | |
805 | debug(50, 0) ("commUnsetNonBlocking: FD %d: %s\n", fd, xstrerror()); | |
806 | return COMM_ERROR; | |
807 | } | |
808 | fd_table[fd].flags.nonblocking = 0; | |
809 | return 0; | |
810 | } | |
811 | ||
b8d8561b | 812 | void |
813 | commSetCloseOnExec(int fd) | |
3ca60c86 | 814 | { |
815 | #ifdef FD_CLOEXEC | |
731e4d49 | 816 | int flags; |
7a18b487 | 817 | int dummy = 0; |
c7989865 | 818 | if ((flags = fcntl(fd, F_GETFL, dummy)) < 0) { |
a3d5953d | 819 | debug(50, 0) ("FD %d: fcntl F_GETFL: %s\n", fd, xstrerror()); |
24382924 | 820 | return; |
3ca60c86 | 821 | } |
24382924 | 822 | if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) |
a3d5953d | 823 | debug(50, 0) ("FD %d: set close-on-exec failed: %s\n", fd, xstrerror()); |
d6827718 | 824 | fd_table[fd].flags.close_on_exec = 1; |
3ca60c86 | 825 | #endif |
826 | } | |
827 | ||
e90100aa | 828 | #ifdef TCP_NODELAY |
829 | static void | |
830 | commSetTcpNoDelay(int fd) | |
831 | { | |
832 | int on = 1; | |
833 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) < 0) | |
a3d5953d | 834 | debug(50, 1) ("commSetTcpNoDelay: FD %d: %s\n", fd, xstrerror()); |
d6827718 | 835 | fd_table[fd].flags.nodelay = 1; |
e90100aa | 836 | } |
837 | #endif | |
838 | ||
6a988308 | 839 | |
d86b3703 | 840 | void |
0673c0ba | 841 | comm_init(void) |
090089c4 | 842 | { |
f1dc9b30 | 843 | fd_table = xcalloc(Squid_MaxFD, sizeof(fde)); |
59c4d35b | 844 | /* XXX account fd_table */ |
090089c4 | 845 | /* Keep a few file descriptors free so that we don't run out of FD's |
846 | * after accepting a client but before it opens a socket or a file. | |
e83892e9 | 847 | * Since Squid_MaxFD can be as high as several thousand, don't waste them */ |
0254ee29 | 848 | RESERVED_FD = XMIN(100, Squid_MaxFD / 4); |
28c60158 | 849 | CBDATA_INIT_TYPE(ConnectStateData); |
723123a9 | 850 | comm_write_pool = memPoolCreate("CommWriteStateData", sizeof(CommWriteStateData)); |
58cd5bbd | 851 | conn_close_pool = memPoolCreate("close_handler", sizeof(close_handler)); |
090089c4 | 852 | } |
853 | ||
30a4f2a8 | 854 | /* Write to FD. */ |
b8d8561b | 855 | static void |
582b6456 | 856 | commHandleWrite(int fd, void *data) |
30a4f2a8 | 857 | { |
f17936ab | 858 | CommWriteStateData *state = data; |
30a4f2a8 | 859 | int len = 0; |
860 | int nleft; | |
861 | ||
32754419 | 862 | debug(5, 5) ("commHandleWrite: FD %d: off %ld, sz %ld.\n", |
863 | fd, (long int) state->offset, (long int) state->size); | |
30a4f2a8 | 864 | |
865 | nleft = state->size - state->offset; | |
1f7c9178 | 866 | len = FD_WRITE_METHOD(fd, state->buf + state->offset, nleft); |
6a988308 | 867 | debug(5, 5) ("commHandleWrite: write() returns %d\n", len); |
b69f7771 | 868 | fd_bytes(fd, len, FD_WRITE); |
83704487 | 869 | statCounter.syscalls.sock.writes++; |
30a4f2a8 | 870 | |
871 | if (len == 0) { | |
872 | /* Note we even call write if nleft == 0 */ | |
873 | /* We're done */ | |
874 | if (nleft != 0) | |
02be0294 | 875 | debug(5, 1) ("commHandleWrite: FD %d: write failure: connection closed with %d bytes remaining.\n", fd, nleft); |
f17936ab | 876 | CommWriteStateCallbackAndFree(fd, nleft ? COMM_ERROR : COMM_OK); |
30a4f2a8 | 877 | } else if (len < 0) { |
878 | /* An error */ | |
e8d6569c | 879 | if (fd_table[fd].flags.socket_eof) { |
880 | debug(50, 2) ("commHandleWrite: FD %d: write failure: %s.\n", | |
881 | fd, xstrerror()); | |
882 | CommWriteStateCallbackAndFree(fd, COMM_ERROR); | |
883 | } else if (ignoreErrno(errno)) { | |
a3d5953d | 884 | debug(50, 10) ("commHandleWrite: FD %d: write failure: %s.\n", |
30a4f2a8 | 885 | fd, xstrerror()); |
b177367b | 886 | commSetSelect(fd, |
30a4f2a8 | 887 | COMM_SELECT_WRITE, |
cd1fb0eb | 888 | commHandleWrite, |
b177367b | 889 | state, |
85d7ea98 | 890 | 0); |
9864ee44 | 891 | } else { |
a3d5953d | 892 | debug(50, 2) ("commHandleWrite: FD %d: write failure: %s.\n", |
9864ee44 | 893 | fd, xstrerror()); |
f17936ab | 894 | CommWriteStateCallbackAndFree(fd, COMM_ERROR); |
30a4f2a8 | 895 | } |
30a4f2a8 | 896 | } else { |
897 | /* A successful write, continue */ | |
898 | state->offset += len; | |
899 | if (state->offset < state->size) { | |
900 | /* Not done, reinstall the write handler and write some more */ | |
b177367b | 901 | commSetSelect(fd, |
30a4f2a8 | 902 | COMM_SELECT_WRITE, |
cd1fb0eb | 903 | commHandleWrite, |
b177367b | 904 | state, |
85d7ea98 | 905 | 0); |
9864ee44 | 906 | } else { |
f17936ab | 907 | CommWriteStateCallbackAndFree(fd, COMM_OK); |
30a4f2a8 | 908 | } |
30a4f2a8 | 909 | } |
910 | } | |
911 | ||
912 | ||
913 | ||
914 | /* Select for Writing on FD, until SIZE bytes are sent. Call | |
a695e7ee | 915 | * *HANDLER when complete. */ |
b8d8561b | 916 | void |
a2c963ae | 917 | comm_write(int fd, const char *buf, int size, CWCB * handler, void *handler_data, FREE * free_func) |
30a4f2a8 | 918 | { |
aa9e2cab | 919 | CommWriteStateData *state = fd_table[fd].rwstate; |
a3d5953d | 920 | debug(5, 5) ("comm_write: FD %d: sz %d: hndl %p: data %p.\n", |
787869c5 | 921 | fd, size, handler, handler_data); |
aa9e2cab | 922 | if (NULL != state) { |
afde8a9d | 923 | debug(5, 1) ("comm_write: fd_table[%d].rwstate != NULL\n", fd); |
723123a9 | 924 | memPoolFree(comm_write_pool, state); |
6cf028ab | 925 | fd_table[fd].rwstate = NULL; |
926 | } | |
723123a9 | 927 | fd_table[fd].rwstate = state = memPoolAlloc(comm_write_pool); |
a2c963ae | 928 | state->buf = (char *) buf; |
30a4f2a8 | 929 | state->size = size; |
930 | state->offset = 0; | |
931 | state->handler = handler; | |
fa80a8ef | 932 | state->handler_data = cbdataReference(handler_data); |
c0dec081 | 933 | state->free_func = free_func; |
aa9e2cab | 934 | commSetSelect(fd, COMM_SELECT_WRITE, commHandleWrite, state, 0); |
30a4f2a8 | 935 | } |
26a880e2 | 936 | |
137ee196 | 937 | /* a wrapper around comm_write to allow for MemBuf to be comm_written in a snap */ |
cb69b4c7 | 938 | void |
939 | comm_write_mbuf(int fd, MemBuf mb, CWCB * handler, void *handler_data) | |
940 | { | |
941 | comm_write(fd, mb.buf, mb.size, handler, handler_data, memBufFreeFunc(&mb)); | |
942 | } | |
943 | ||
89924214 | 944 | /* |
945 | * hm, this might be too general-purpose for all the places we'd | |
946 | * like to use it. | |
947 | */ | |
b224ea98 | 948 | int |
edd2eb63 | 949 | ignoreErrno(int ierrno) |
26a880e2 | 950 | { |
603500e7 | 951 | switch (ierrno) { |
89924214 | 952 | case EINPROGRESS: |
603500e7 | 953 | case EWOULDBLOCK: |
26a880e2 | 954 | #if EAGAIN != EWOULDBLOCK |
603500e7 | 955 | case EAGAIN: |
26a880e2 | 956 | #endif |
603500e7 | 957 | case EALREADY: |
958 | case EINTR: | |
db494ab8 | 959 | #ifdef ERESTART |
960 | case ERESTART: | |
961 | #endif | |
26a880e2 | 962 | return 1; |
603500e7 | 963 | default: |
964 | return 0; | |
965 | } | |
966 | /* NOTREACHED */ | |
26a880e2 | 967 | } |
d723bf6b | 968 | |
969 | void | |
970 | commCloseAllSockets(void) | |
971 | { | |
972 | int fd; | |
973 | fde *F = NULL; | |
d723bf6b | 974 | for (fd = 0; fd <= Biggest_FD; fd++) { |
975 | F = &fd_table[fd]; | |
60c0b5a2 | 976 | if (!F->flags.open) |
d723bf6b | 977 | continue; |
978 | if (F->type != FD_SOCKET) | |
979 | continue; | |
de718ec4 | 980 | if (F->flags.ipc) /* don't close inter-process sockets */ |
981 | continue; | |
d723bf6b | 982 | if (F->timeout_handler) { |
fa80a8ef | 983 | PF *callback = F->timeout_handler; |
984 | void *cbdata = NULL; | |
985 | F->timeout_handler = NULL; | |
d723bf6b | 986 | debug(5, 5) ("commCloseAllSockets: FD %d: Calling timeout handler\n", |
987 | fd); | |
fa80a8ef | 988 | if (cbdataReferenceValidDone(F->timeout_data, &cbdata)) |
989 | callback(fd, cbdata); | |
d723bf6b | 990 | } else { |
991 | debug(5, 5) ("commCloseAllSockets: FD %d: calling comm_close()\n", fd); | |
992 | comm_close(fd); | |
993 | } | |
994 | } | |
995 | } | |
1b3db6d9 | 996 | |
997 | void | |
998 | checkTimeouts(void) | |
999 | { | |
1000 | int fd; | |
1001 | fde *F = NULL; | |
1002 | PF *callback; | |
1003 | for (fd = 0; fd <= Biggest_FD; fd++) { | |
b5443c04 | 1004 | F = &fd_table[fd]; |
1005 | if (!F->flags.open) | |
1006 | continue; | |
1007 | if (F->timeout == 0) | |
1008 | continue; | |
1009 | if (F->timeout > squid_curtime) | |
1010 | continue; | |
1011 | debug(5, 5) ("checkTimeouts: FD %d Expired\n", fd); | |
1012 | if (F->timeout_handler) { | |
1013 | debug(5, 5) ("checkTimeouts: FD %d: Call timeout handler\n", fd); | |
1014 | callback = F->timeout_handler; | |
1015 | F->timeout_handler = NULL; | |
1016 | callback(fd, F->timeout_data); | |
1017 | } else { | |
1018 | debug(5, 5) ("checkTimeouts: FD %d: Forcing comm_close()\n", fd); | |
1019 | comm_close(fd); | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | ||
1025 | int | |
1b3db6d9 | 1026 | commDeferRead(int fd) |
1027 | { | |
1028 | fde *F = &fd_table[fd]; | |
1029 | if (F->defer_check == NULL) | |
b5443c04 | 1030 | return 0; |
1b3db6d9 | 1031 | return F->defer_check(fd, F->defer_data); |
1032 | } |