5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2005 - 2006 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
22 /************************** Types and definitions ***************************/
24 #define SILC_IS_FD_STREAM(s) (s->ops == &silc_fd_stream_ops)
26 const SilcStreamOps silc_fd_stream_ops;
28 /* FD stream context */
30 const SilcStreamOps *ops;
31 SilcSchedule schedule;
32 SilcStreamNotifier notifier;
33 void *notifier_context;
40 /************************ Static utility functions **************************/
42 /* The IO process callback that calls the notifier callback to upper layer. */
44 SILC_TASK_CALLBACK(silc_fd_stream_io)
46 SilcFDStream stream = context;
48 if (!stream->notifier)
53 stream->notifier(stream, SILC_STREAM_CAN_READ, stream->notifier_context);
57 stream->notifier(stream, SILC_STREAM_CAN_WRITE, stream->notifier_context);
66 /****************************** Public API **********************************/
68 /* Create file descriptor stream */
70 SilcStream silc_fd_stream_create(int fd)
74 return silc_fd_stream_create2(fd, 0);
77 /* Create stream with two file descriptors */
79 SilcStream silc_fd_stream_create2(int read_fd, int write_fd)
86 stream = silc_calloc(1, sizeof(*stream));
90 SILC_LOG_DEBUG(("Creating new fd stream %p", stream));
92 stream->ops = &silc_fd_stream_ops;
93 stream->fd1 = read_fd;
94 stream->fd2 = write_fd;
99 /* Create by opening file */
101 SilcStream silc_fd_stream_file(const char *filename,
102 SilcBool reading, SilcBool writing)
112 flags |= O_CREAT | O_WRONLY;
113 if (reading && writing)
114 flags = O_CREAT | O_RDWR;
116 fd = silc_file_open(filename, flags);
120 return silc_fd_stream_create(fd);
125 SilcBool silc_fd_stream_get_info(SilcStream stream, int *read_fd,
128 SilcFDStream fd_stream = stream;
130 if (!SILC_IS_FD_STREAM(fd_stream))
134 *read_fd = fd_stream->fd1;
136 *write_fd = fd_stream->fd2;
143 int silc_fd_stream_get_error(SilcStream stream)
145 SilcFDStream fd_stream = stream;
147 if (!SILC_IS_FD_STREAM(fd_stream))
150 return fd_stream->error;
155 int silc_fd_stream_read(SilcStream stream, unsigned char *buf,
158 SilcFDStream fd_stream = stream;
161 if (!fd_stream->notifier)
164 SILC_LOG_DEBUG(("Reading data from fd %d", fd_stream->fd1));
166 len = silc_file_read(fd_stream->fd1, buf, buf_len);
168 if (errno == EAGAIN || errno == EINTR) {
169 SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
170 silc_schedule_set_listen_fd(fd_stream->schedule, fd_stream->fd1,
171 SILC_TASK_READ, FALSE);
174 SILC_LOG_DEBUG(("Cannot read from fd: %d:%s",
175 fd_stream->fd1, strerror(errno)));
176 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd1);
177 fd_stream->error = errno;
181 SILC_LOG_DEBUG(("Read %d bytes", len));
184 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd1);
191 int silc_fd_stream_write(SilcStream stream, const unsigned char *data,
194 SilcFDStream fd_stream = stream;
197 if (!fd_stream->notifier)
200 SILC_LOG_DEBUG(("Writing data to fd %d", fd_stream->fd2));
202 ret = silc_file_write(fd_stream->fd2, data, data_len);
204 if (errno == EAGAIN || errno == EINTR) {
205 SILC_LOG_DEBUG(("Could not write immediately, will do it later"));
206 silc_schedule_set_listen_fd(fd_stream->schedule, fd_stream->fd2,
207 SILC_TASK_READ | SILC_TASK_WRITE, FALSE);
210 SILC_LOG_DEBUG(("Cannot write to fd: %s", strerror(errno)));
211 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd2);
212 fd_stream->error = errno;
216 SILC_LOG_DEBUG(("Wrote data %d bytes", ret));
218 if (fd_stream->fd1 == fd_stream->fd2)
219 silc_schedule_set_listen_fd(fd_stream->schedule, fd_stream->fd2,
220 SILC_TASK_READ, FALSE);
222 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd2);
229 SilcBool silc_fd_stream_close(SilcStream stream)
231 SilcFDStream fd_stream = stream;
233 if (fd_stream->fd1 > 0) {
234 silc_file_close(fd_stream->fd1);
235 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd1);
236 silc_schedule_task_del_by_fd(fd_stream->schedule, fd_stream->fd1);
238 if (fd_stream->fd2 > 0 && fd_stream->fd2 != fd_stream->fd1) {
239 silc_file_close(fd_stream->fd2);
240 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd2);
241 silc_schedule_task_del_by_fd(fd_stream->schedule, fd_stream->fd2);
249 void silc_fd_stream_destroy(SilcStream stream)
251 silc_fd_stream_close(stream);
255 /* Sets stream notification callback for the stream */
257 SilcBool silc_fd_stream_notifier(SilcStream stream,
258 SilcSchedule schedule,
259 SilcStreamNotifier callback,
262 SilcFDStream fd_stream = stream;
264 SILC_LOG_DEBUG(("Setting stream notifier callback"));
266 fd_stream->notifier = callback;
267 fd_stream->notifier_context = context;
268 fd_stream->schedule = schedule;
270 /* Schedule the file descriptors */
272 if (fd_stream->fd2 > 0) {
273 silc_schedule_task_add_fd(schedule, fd_stream->fd2,
274 silc_fd_stream_io, stream);
275 silc_file_set_nonblock(fd_stream->fd2);
277 if (fd_stream->fd1 > 0) {
278 silc_schedule_task_add_fd(schedule, fd_stream->fd1,
279 silc_fd_stream_io, stream);
280 silc_schedule_set_listen_fd(schedule, fd_stream->fd1,
281 SILC_TASK_READ, FALSE);
282 silc_file_set_nonblock(fd_stream->fd1);;
283 if (fd_stream->fd2 < 1)
284 fd_stream->fd2 = fd_stream->fd1;
287 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd1);
288 silc_schedule_unset_listen_fd(fd_stream->schedule, fd_stream->fd2);
289 silc_schedule_task_del_by_fd(fd_stream->schedule, fd_stream->fd1);
290 silc_schedule_task_del_by_fd(fd_stream->schedule, fd_stream->fd2);
296 /* Return schedule */
298 SilcSchedule silc_fd_stream_get_schedule(SilcStream stream)
300 SilcFDStream fd_stream = stream;
301 return fd_stream->schedule;
304 /* File descriptor stream operations */
305 const SilcStreamOps silc_fd_stream_ops =
308 silc_fd_stream_write,
309 silc_fd_stream_close,
310 silc_fd_stream_destroy,
311 silc_fd_stream_notifier,
312 silc_fd_stream_get_schedule