1
/* Copyright (C) 2000 MySQL AB
3
This program is free software; you can redistribute it and/or modify
4
it under the terms of the GNU General Public License as published by
5
the Free Software Foundation; version 2 of the License.
7
This program is distributed in the hope that it will be useful,
8
but WITHOUT ANY WARRANTY; without even the implied warranty of
9
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10
GNU General Public License for more details.
12
You should have received a copy of the GNU General Public License
13
along with this program; if not, write to the Free Software
14
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
17
Note that we can't have assertion on file descriptors; The reason for
18
this is that during mysql shutdown, another thread can close a file
19
we are working on. In this case we should just return read errors from
26
* Helper to fill most of the Vio* with defaults.
29
static void vio_init(Vio* vio, enum enum_vio_type type,
30
my_socket sd, HANDLE hPipe, uint flags)
32
DBUG_ENTER("vio_init");
33
DBUG_PRINT("enter", ("type: %d sd: %d flags: %d", type, sd, flags));
35
#ifndef HAVE_VIO_READ_BUFF
36
flags&= ~VIO_BUFFERED_READ;
38
bzero((char*) vio, sizeof(*vio));
42
vio->localhost= flags & VIO_LOCALHOST;
43
if ((flags & VIO_BUFFERED_READ) &&
44
!(vio->read_buffer= (char*)my_malloc(VIO_READ_BUFFER_SIZE, MYF(MY_WME))))
45
flags&= ~VIO_BUFFERED_READ;
47
if (type == VIO_TYPE_NAMEDPIPE)
49
vio->viodelete =vio_delete;
50
vio->vioerrno =vio_errno;
51
vio->read =vio_read_pipe;
52
vio->write =vio_write_pipe;
53
vio->fastsend =vio_fastsend;
54
vio->viokeepalive =vio_keepalive;
55
vio->should_retry =vio_should_retry;
56
vio->was_interrupted=vio_was_interrupted;
57
vio->vioclose =vio_close_pipe;
58
vio->peer_addr =vio_peer_addr;
59
vio->vioblocking =vio_blocking;
60
vio->is_blocking =vio_is_blocking;
61
vio->timeout =vio_ignore_timeout;
63
else /* default is VIO_TYPE_TCPIP */
66
if (type == VIO_TYPE_SHARED_MEMORY)
68
vio->viodelete =vio_delete;
69
vio->vioerrno =vio_errno;
70
vio->read =vio_read_shared_memory;
71
vio->write =vio_write_shared_memory;
72
vio->fastsend =vio_fastsend;
73
vio->viokeepalive =vio_keepalive;
74
vio->should_retry =vio_should_retry;
75
vio->was_interrupted=vio_was_interrupted;
76
vio->vioclose =vio_close_shared_memory;
77
vio->peer_addr =vio_peer_addr;
78
vio->vioblocking =vio_blocking;
79
vio->is_blocking =vio_is_blocking;
80
vio->timeout =vio_ignore_timeout;
85
if (type == VIO_TYPE_SSL)
87
vio->viodelete =vio_ssl_delete;
88
vio->vioerrno =vio_errno;
89
vio->read =vio_ssl_read;
90
vio->write =vio_ssl_write;
91
vio->fastsend =vio_fastsend;
92
vio->viokeepalive =vio_keepalive;
93
vio->should_retry =vio_should_retry;
94
vio->was_interrupted=vio_was_interrupted;
95
vio->vioclose =vio_ssl_close;
96
vio->peer_addr =vio_peer_addr;
97
vio->vioblocking =vio_ssl_blocking;
98
vio->is_blocking =vio_is_blocking;
99
vio->timeout =vio_timeout;
101
else /* default is VIO_TYPE_TCPIP */
102
#endif /* HAVE_OPENSSL */
104
vio->viodelete =vio_delete;
105
vio->vioerrno =vio_errno;
106
vio->read= (flags & VIO_BUFFERED_READ) ? vio_read_buff : vio_read;
107
vio->write =vio_write;
108
vio->fastsend =vio_fastsend;
109
vio->viokeepalive =vio_keepalive;
110
vio->should_retry =vio_should_retry;
111
vio->was_interrupted=vio_was_interrupted;
112
vio->vioclose =vio_close;
113
vio->peer_addr =vio_peer_addr;
114
vio->vioblocking =vio_blocking;
115
vio->is_blocking =vio_is_blocking;
116
vio->timeout =vio_timeout;
122
/* Reset initialized VIO to use with another transport type */
124
void vio_reset(Vio* vio, enum enum_vio_type type,
125
my_socket sd, HANDLE hPipe, uint flags)
127
my_free(vio->read_buffer, MYF(MY_ALLOW_ZERO_PTR));
128
vio_init(vio, type, sd, hPipe, flags);
132
/* Open the socket or TCP/IP connection and read the fnctl() status */
134
Vio *vio_new(my_socket sd, enum enum_vio_type type, uint flags)
137
DBUG_ENTER("vio_new");
138
DBUG_PRINT("enter", ("sd: %d", sd));
139
if ((vio = (Vio*) my_malloc(sizeof(*vio),MYF(MY_WME))))
141
vio_init(vio, type, sd, 0, flags);
143
(vio->type == VIO_TYPE_SOCKET ? "socket (%d)" : "TCP/IP (%d)"),
145
#if !defined(__WIN__)
146
#if !defined(NO_FCNTL_NONBLOCK)
148
We call fcntl() to set the flags and then immediately read them back
149
to make sure that we and the system are in agreement on the state of
152
An example of why we need to do this is FreeBSD (and apparently some
153
other BSD-derived systems, like Mac OS X), where the system sometimes
154
reports that the socket is set for non-blocking when it really will
157
fcntl(sd, F_SETFL, 0);
158
vio->fcntl_mode= fcntl(sd, F_GETFL);
159
#elif defined(HAVE_SYS_IOCTL_H) /* hpux */
160
/* Non blocking sockets doesn't work good on HPUX 11.0 */
161
(void) ioctl(sd,FIOSNBIO,0);
162
vio->fcntl_mode &= ~O_NONBLOCK;
164
#else /* !defined(__WIN__) */
166
/* set to blocking mode by default */
168
r = ioctlsocket(sd,FIONBIO,(void*) &arg);
169
vio->fcntl_mode &= ~O_NONBLOCK;
179
Vio *vio_new_win32pipe(HANDLE hPipe)
182
DBUG_ENTER("vio_new_handle");
183
if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
185
vio_init(vio, VIO_TYPE_NAMEDPIPE, 0, hPipe, VIO_LOCALHOST);
186
strmov(vio->desc, "named pipe");
192
Vio *vio_new_win32shared_memory(NET *net,HANDLE handle_file_map, HANDLE handle_map,
193
HANDLE event_server_wrote, HANDLE event_server_read,
194
HANDLE event_client_wrote, HANDLE event_client_read,
195
HANDLE event_conn_closed)
198
DBUG_ENTER("vio_new_win32shared_memory");
199
if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
201
vio_init(vio, VIO_TYPE_SHARED_MEMORY, 0, 0, VIO_LOCALHOST);
202
vio->handle_file_map= handle_file_map;
203
vio->handle_map= handle_map;
204
vio->event_server_wrote= event_server_wrote;
205
vio->event_server_read= event_server_read;
206
vio->event_client_wrote= event_client_wrote;
207
vio->event_client_read= event_client_read;
208
vio->event_conn_closed= event_conn_closed;
209
vio->shared_memory_remain= 0;
210
vio->shared_memory_pos= handle_map;
212
strmov(vio->desc, "shared memory");
220
void vio_delete(Vio* vio)
223
return; /* It must be safe to delete null pointers. */
225
if (vio->type != VIO_CLOSED)
227
my_free((uchar*) vio->read_buffer, MYF(MY_ALLOW_ZERO_PTR));
228
my_free((uchar*) vio,MYF(0));
233
Cleanup memory allocated by vio or the
234
components below it when application finish