1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
|
/* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2012, Monty Program Ab
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/*
Note that we can't have assertion on file descriptors; The reason for
this is that during mysql shutdown, another thread can close a file
we are working on. In this case we should just return read errors from
the file descriptior.
*/
#include "vio_priv.h"
#ifdef _WIN32
/**
Stub io_wait method that defaults to indicate that
requested I/O event is ready.
Used for named pipe and shared memory VIO types.
@param vio Unused.
@param event Unused.
@param timeout Unused.
@retval 1 The requested I/O event has occurred.
*/
static int no_io_wait(Vio *vio __attribute__((unused)),
enum enum_vio_io_event event __attribute__((unused)),
int timeout __attribute__((unused)))
{
return 1;
}
#endif
static my_bool has_no_data(Vio *vio __attribute__((unused)))
{
return FALSE;
}
#ifdef _WIN32
my_bool vio_shared_memory_has_data(Vio *vio)
{
return (vio->shared_memory_remain > 0);
}
int vio_shared_memory_shutdown(Vio *vio, int how)
{
SetEvent(vio->event_conn_closed);
SetEvent(vio->event_server_wrote);
return 0;
}
int vio_pipe_shutdown(Vio *vio, int how)
{
return cancel_io(vio->hPipe, vio->thread_id);
}
#endif
/*
* Helper to fill most of the Vio* with defaults.
*/
static void vio_init(Vio *vio, enum enum_vio_type type,
my_socket sd, uint flags)
{
DBUG_ENTER("vio_init");
DBUG_PRINT("enter", ("type: %d sd: %d flags: %d", type, sd, flags));
#ifndef HAVE_VIO_READ_BUFF
flags&= ~VIO_BUFFERED_READ;
#endif
memset(vio, 0, sizeof(*vio));
vio->type= type;
vio->mysql_socket= MYSQL_INVALID_SOCKET;
mysql_socket_setfd(&vio->mysql_socket, sd);
vio->localhost= flags & VIO_LOCALHOST;
vio->read_timeout= vio->write_timeout= -1;
if ((flags & VIO_BUFFERED_READ) &&
!(vio->read_buffer= (char*)my_malloc(VIO_READ_BUFFER_SIZE, MYF(MY_WME))))
flags&= ~VIO_BUFFERED_READ;
#ifdef _WIN32
if (type == VIO_TYPE_NAMEDPIPE)
{
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read =vio_read_pipe;
vio->write =vio_write_pipe;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_close_pipe;
vio->peer_addr =vio_peer_addr;
vio->io_wait =no_io_wait;
vio->is_connected =vio_is_connected_pipe;
vio->has_data =has_no_data;
vio->shutdown =vio_pipe_shutdown;
DBUG_VOID_RETURN;
}
#endif
#ifdef HAVE_SMEM
if (type == VIO_TYPE_SHARED_MEMORY)
{
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read =vio_read_shared_memory;
vio->write =vio_write_shared_memory;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_close_shared_memory;
vio->peer_addr =vio_peer_addr;
vio->io_wait =no_io_wait;
vio->is_connected =vio_is_connected_shared_memory;
vio->has_data =vio_shared_memory_has_data;
vio->shutdown =vio_shared_memory_shutdown;
DBUG_VOID_RETURN;
}
#endif
#ifdef HAVE_OPENSSL
if (type == VIO_TYPE_SSL)
{
vio->viodelete =vio_ssl_delete;
vio->vioerrno =vio_errno;
vio->read =vio_ssl_read;
vio->write =vio_ssl_write;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_ssl_close;
vio->peer_addr =vio_peer_addr;
vio->io_wait =vio_io_wait;
vio->is_connected =vio_is_connected;
vio->has_data =vio_ssl_has_data;
vio->shutdown =vio_socket_shutdown;
vio->timeout =vio_socket_timeout;
DBUG_VOID_RETURN;
}
#endif /* HAVE_OPENSSL */
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read= (flags & VIO_BUFFERED_READ) ? vio_read_buff : vio_read;
vio->write =vio_write;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_close;
vio->peer_addr =vio_peer_addr;
vio->io_wait =vio_io_wait;
vio->is_connected =vio_is_connected;
vio->shutdown =vio_socket_shutdown;
vio->timeout =vio_socket_timeout;
vio->has_data = ((flags & VIO_BUFFERED_READ) ?
vio_buff_has_data : has_no_data);
DBUG_VOID_RETURN;
}
/**
Reinitialize an existing Vio object.
@remark Used to rebind an initialized socket-based Vio object
to another socket-based transport type. For example,
rebind a TCP/IP transport to SSL.
@param vio A VIO object.
@param type A socket-based transport type.
@param sd The socket.
@param ssl An optional SSL structure.
@param flags Flags passed to vio_init.
@return Return value is zero on success.
*/
my_bool vio_reset(Vio* vio, enum enum_vio_type type,
my_socket sd, void *ssl __attribute__((unused)), uint flags)
{
int ret= FALSE;
Vio old_vio= *vio;
DBUG_ENTER("vio_reset");
/* The only supported rebind is from a socket-based transport type. */
DBUG_ASSERT(vio->type == VIO_TYPE_TCPIP || vio->type == VIO_TYPE_SOCKET);
/*
Will be reinitialized depending on the flags.
Nonetheless, already buffered inside the SSL layer.
*/
my_free(vio->read_buffer);
vio_init(vio, type, sd, flags);
/* Preserve perfschema info for this connection */
vio->mysql_socket.m_psi= old_vio.mysql_socket.m_psi;
#ifdef HAVE_OPENSSL
vio->ssl_arg= ssl;
#endif
/*
Propagate the timeout values. Necessary to also propagate
the underlying proprieties associated with the timeout,
such as the socket blocking mode.
*/
if (old_vio.read_timeout >= 0)
ret|= vio_timeout(vio, 0, old_vio.read_timeout);
if (old_vio.write_timeout >= 0)
ret|= vio_timeout(vio, 1, old_vio.write_timeout);
DBUG_RETURN(test(ret));
}
/* Create a new VIO for socket or TCP/IP connection. */
Vio *mysql_socket_vio_new(MYSQL_SOCKET mysql_socket, enum enum_vio_type type, uint flags)
{
Vio *vio;
my_socket sd= mysql_socket_getfd(mysql_socket);
DBUG_ENTER("mysql_socket_vio_new");
DBUG_PRINT("enter", ("sd: %d", sd));
if ((vio = (Vio*) my_malloc(sizeof(*vio),MYF(MY_WME))))
{
vio_init(vio, type, sd, flags);
vio->mysql_socket= mysql_socket;
}
DBUG_RETURN(vio);
}
/* Open the socket or TCP/IP connection and read the fnctl() status */
Vio *vio_new(my_socket sd, enum enum_vio_type type, uint flags)
{
Vio *vio;
MYSQL_SOCKET mysql_socket= MYSQL_INVALID_SOCKET;
DBUG_ENTER("vio_new");
DBUG_PRINT("enter", ("sd: %d", sd));
mysql_socket_setfd(&mysql_socket, sd);
vio = mysql_socket_vio_new(mysql_socket, type, flags);
DBUG_RETURN(vio);
}
#ifdef _WIN32
Vio *vio_new_win32pipe(HANDLE hPipe)
{
Vio *vio;
DBUG_ENTER("vio_new_handle");
if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
{
vio_init(vio, VIO_TYPE_NAMEDPIPE, 0, VIO_LOCALHOST);
/* Create an object for event notification. */
vio->overlapped.hEvent= CreateEvent(NULL, FALSE, FALSE, NULL);
if (vio->overlapped.hEvent == NULL)
{
my_free(vio);
DBUG_RETURN(NULL);
}
vio->hPipe= hPipe;
strmov(vio->desc, "named pipe");
}
DBUG_RETURN(vio);
}
#ifdef HAVE_SMEM
Vio *vio_new_win32shared_memory(HANDLE handle_file_map, HANDLE handle_map,
HANDLE event_server_wrote, HANDLE event_server_read,
HANDLE event_client_wrote, HANDLE event_client_read,
HANDLE event_conn_closed)
{
Vio *vio;
DBUG_ENTER("vio_new_win32shared_memory");
if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
{
vio_init(vio, VIO_TYPE_SHARED_MEMORY, 0, VIO_LOCALHOST);
vio->handle_file_map= handle_file_map;
vio->handle_map= handle_map;
vio->event_server_wrote= event_server_wrote;
vio->event_server_read= event_server_read;
vio->event_client_wrote= event_client_wrote;
vio->event_client_read= event_client_read;
vio->event_conn_closed= event_conn_closed;
vio->shared_memory_remain= 0;
vio->shared_memory_pos= handle_map;
strmov(vio->desc, "shared memory");
}
DBUG_RETURN(vio);
}
#endif
#endif
/**
Set timeout for a network send or receive operation.
@remark A non-infinite timeout causes the socket to be
set to non-blocking mode. On infinite timeouts,
the socket is set to blocking mode.
@remark A negative timeout means an infinite timeout.
@param vio A VIO object.
@param which Whether timeout is for send (1) or receive (0).
@param timeout Timeout interval in seconds.
@return FALSE on success, TRUE otherwise.
*/
int vio_timeout(Vio *vio, uint which, int timeout_sec)
{
int timeout_ms;
my_bool old_mode;
/*
Vio timeouts are measured in milliseconds. Check for a possible
overflow. In case of overflow, set to infinite.
*/
if (timeout_sec > INT_MAX/1000)
timeout_ms= -1;
else
timeout_ms= (int) (timeout_sec * 1000);
/* Deduce the current timeout status mode. */
old_mode= vio->write_timeout < 0 && vio->read_timeout < 0;
if (which)
vio->write_timeout= timeout_ms;
else
vio->read_timeout= timeout_ms;
/* VIO-specific timeout handling. Might change the blocking mode. */
return vio->timeout ? vio->timeout(vio, which, old_mode) : 0;
}
void vio_delete(Vio* vio)
{
if (!vio)
return; /* It must be safe to delete null pointers. */
if (vio->type != VIO_CLOSED)
vio->vioclose(vio);
my_free(vio->read_buffer);
my_free(vio);
}
/*
Cleanup memory allocated by vio or the
components below it when application finish
*/
void vio_end(void)
{
#ifdef HAVE_YASSL
yaSSL_CleanUp();
#endif
}
|