1
/* $Xorg: FSConnServ.c,v 1.4 2001/02/09 02:03:25 xorgcvs Exp $ */
4
* Copyright 1990 Network Computing Devices;
5
* Portions Copyright 1987 by Digital Equipment Corporation
7
* Permission to use, copy, modify, distribute, and sell this software
8
* and its documentation for any purpose is hereby granted without fee,
9
* provided that the above copyright notice appear in all copies and
10
* that both that copyright notice and this permission notice appear
11
* in supporting documentation, and that the names of Network Computing
12
* Devices or Digital not be used in advertising or publicity pertaining
13
* to distribution of the software without specific, written prior
14
* permission. Network Computing Devices or Digital make no representations
15
* about the suitability of this software for any purpose. It is provided
16
* "as is" without express or implied warranty.
18
* NETWORK COMPUTING DEVICES AND DIGITAL DISCLAIM ALL WARRANTIES WITH
19
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
20
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NETWORK COMPUTING DEVICES
21
* OR DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES
22
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
23
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
24
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
30
Copyright 1987, 1994, 1998 The Open Group
32
Permission to use, copy, modify, distribute, and sell this software and its
33
documentation for any purpose is hereby granted without fee, provided that
34
the above copyright notice appear in all copies and that both that
35
copyright notice and this permission notice appear in supporting
38
The above copyright notice and this permission notice shall be included in
39
all copies or substantial portions of the Software.
41
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
42
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
43
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
44
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
45
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
46
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
48
Except as contained in this notice, the name of The Open Group shall not be
49
used in advertising or otherwise to promote the sale, use or other dealings
50
in this Software without prior written authorization from The Open Group.
53
/* $XFree86: xc/lib/FS/FSConnServ.c,v 3.11 2001/12/14 19:53:32 dawes Exp $ */
57
#include "X11/Xpoll.h"
62
#define ECHECK(err) (WSAGetLastError() == err)
65
#define ECHECK(err) ((errno == err) || errno == EAGAIN || errno == EWOULDBLOCK)
67
#define ECHECK(err) (errno == err)
72
* Attempts to connect to server, given server name. Returns transport
73
* connection object or NULL if connection fails.
76
#define FS_CONNECTION_RETRIES 5
79
_FSConnectServer(server_name)
82
XtransConnInfo trans_conn = NULL; /* transport connection object */
83
int retry, connect_stat;
84
int madeConnection = 0;
87
* Open the network connection.
90
for (retry = FS_CONNECTION_RETRIES; retry >= 0; retry--)
92
if ((trans_conn = _FSTransOpenCOTSClient(server_name)) == NULL)
97
if ((connect_stat = _FSTransConnect(trans_conn,server_name)) < 0)
99
_FSTransClose(trans_conn);
101
if (connect_stat == TRANS_TRY_CONNECT_AGAIN)
121
* set it non-blocking. This is so we can read data when blocked for
122
* writing in the library.
125
_FSTransSetOption(trans_conn, TRANS_NONBLOCKING, 1);
131
* Disconnect from server.
135
_FSDisconnectServer(trans_conn)
136
XtransConnInfo trans_conn;
139
(void) _FSTransClose(trans_conn);
144
* This is an OS dependent routine which:
145
* 1) returns as soon as the connection can be written on....
146
* 2) if the connection can be read, must enqueue events and handle errors,
147
* until the connection is writable.
149
void _FSWaitForWritable(svr)
160
FD_SET(svr->fd, &r_mask);
161
FD_SET(svr->fd, &w_mask);
164
nfound = Select(svr->fd + 1, &r_mask, &w_mask, NULL, NULL);
165
if (nfound < 0 && !ECHECK(EINTR))
166
(*_FSIOErrorFunction) (svr);
167
} while (nfound <= 0);
169
if (XFD_ANYSET(&r_mask)) {
171
BytesReadable_t pend_not_register;
172
register BytesReadable_t pend;
173
register fsEvent *ev;
175
/* find out how much data can be read */
176
if (_FSTransBytesReadable(svr->trans_conn, &pend_not_register) < 0)
177
(*_FSIOErrorFunction) (svr);
178
pend = pend_not_register;
181
* must read at least one fsEvent; if none is pending, then we'll
182
* just block waiting for it
184
if (pend < SIZEOF(fsEvent))
185
pend = SIZEOF(fsEvent);
187
/* but we won't read more than the max buffer size */
191
/* round down to an integral number of FSReps */
192
pend = (pend / SIZEOF(fsEvent)) * SIZEOF(fsEvent);
194
_FSRead(svr, buf, pend);
196
/* no space between comma and type or else macro will die */
197
STARTITERATE(ev, fsEvent, buf, (pend > 0),
198
(pend -= SIZEOF(fsEvent))) {
199
if (ev->type == FS_Error)
200
_FSError(svr, (fsError *) ev);
201
else /* it's an event packet; enqueue it */
206
if (XFD_ANYSET(&w_mask))
212
void _FSWaitForReadable(svr)
220
FD_SET(svr->fd, &r_mask);
221
result = Select(svr->fd + 1, &r_mask, NULL, NULL, NULL);
222
if (result == -1 && !ECHECK(EINTR))
223
(*_FSIOErrorFunction) (svr);
224
} while (result <= 0);
227
void _FSSendClientPrefix(svr, client)
229
fsConnClientPrefix *client;
231
struct iovec iovarray[5],
235
#define add_to_iov(b,l) \
236
{ iov->iov_base = (b); iov->iov_len = (l); iov++, niov++; }
238
add_to_iov((caddr_t) client, SIZEOF(fsConnClientPrefix));
242
(void) _FSTransWritev(svr->trans_conn, iovarray, niov);