3 silcwin32socketstream.c
5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2007 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 /************************ Static utility functions **************************/
24 /* The IO process callback that calls the notifier callback to upper layer. */
26 SILC_TASK_CALLBACK(silc_socket_stream_io)
28 SilcSocketStream stream = context;
30 if (!stream->notifier)
35 stream->notifier(stream, SILC_STREAM_CAN_READ, stream->notifier_context);
39 stream->notifier(stream, SILC_STREAM_CAN_WRITE, stream->notifier_context);
47 /**************************** Stream Operations *****************************/
49 /* Stream read operation */
51 int silc_socket_stream_read(SilcStream stream, unsigned char *buf,
54 SilcSocketStream sock = stream;
55 SOCKET fd = sock->sock;
58 SILC_LOG_DEBUG(("Reading data from socket %d", fd));
60 /* Check whether there is data available, without calling recv(). */
61 ioctlsocket(fd, FIONREAD, (unsigned long *)&argp);
63 /* Is this kludge or what? Without this thing this contraption
64 does not work at all!?. */
66 SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
67 silc_schedule_set_listen_fd(sock->schedule, sock->sock,
68 silc_schedule_get_fd_events(sock->schedule,
70 SILC_TASK_READ, FALSE);
74 /* Read the data from the socket. */
75 len = recv(fd, buf, buf_len, 0);
76 if (len == SOCKET_ERROR) {
77 len = WSAGetLastError();
78 if (len == WSAEWOULDBLOCK || len == WSAEINTR) {
79 SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
80 silc_schedule_set_listen_fd(sock->schedule, sock->sock,
81 silc_schedule_get_fd_events(sock->schedule,
83 SILC_TASK_READ, FALSE);
86 SILC_LOG_DEBUG(("Cannot read from socket: %d", sock->sock));
87 silc_schedule_unset_listen_fd(sock->schedule, sock->sock);
88 sock->sock_error = len;
92 SILC_LOG_DEBUG(("Read %d bytes", len));
95 silc_schedule_unset_listen_fd(sock->schedule, sock->sock);
100 /* Stream write operation */
102 int silc_socket_stream_write(SilcStream stream, const unsigned char *data,
105 SilcSocketStream sock = stream;
106 SOCKET fd = sock->sock;
109 SILC_LOG_DEBUG(("Writing data to socket %d", fd));
111 ret = send(fd, data, data_len, 0);
112 if (ret == SOCKET_ERROR) {
113 ret = WSAGetLastError();
114 if (ret == WSAEWOULDBLOCK) {
115 SILC_LOG_DEBUG(("Could not write immediately, will do it later"));
116 silc_schedule_set_listen_fd(sock->schedule, sock->sock,
117 SILC_TASK_READ | SILC_TASK_WRITE, FALSE);
120 SILC_LOG_DEBUG(("Cannot write to socket"));
121 silc_schedule_unset_listen_fd(sock->schedule, sock->sock);
122 sock->sock_error = ret;
126 SILC_LOG_DEBUG(("Wrote data %d bytes", ret));
127 if (silc_schedule_get_fd_events(sock->schedule, sock->sock) &
129 silc_schedule_set_listen_fd(sock->schedule, sock->sock,
130 SILC_TASK_READ, FALSE);
135 /* Receive UDP packet. QoS is not supported. */
137 int silc_socket_udp_stream_read(SilcStream stream, unsigned char *buf,
140 return silc_net_udp_receive(stream, NULL, 0, NULL, buf, buf_len);
143 /* Send UDP packet. This always succeeds. */
145 int silc_socket_udp_stream_write(SilcStream stream, const unsigned char *data,
148 SilcSocketStream sock = stream;
150 /* In connectionless state check if remote IP and port is provided */
151 if (!sock->connected && sock->ip && sock->port)
152 return silc_net_udp_send(stream, sock->ip, sock->port, data, data_len);
154 /* In connected state use normal writing to socket. */
155 return silc_socket_stream_write(stream, data, data_len);
160 SilcBool silc_socket_stream_close(SilcStream stream)
162 SilcSocketStream socket_stream = stream;
164 if (socket_stream->schedule) {
165 silc_schedule_unset_listen_fd(socket_stream->schedule,
166 socket_stream->sock);
167 silc_schedule_task_del_by_fd(socket_stream->schedule,
168 socket_stream->sock);
170 silc_net_close_connection(socket_stream->sock);
175 /* Destroys the stream */
177 void silc_socket_stream_destroy(SilcStream stream)
179 SilcSocketStream socket_stream = stream;
181 silc_socket_stream_close(socket_stream);
182 silc_free(socket_stream->ip);
183 silc_free(socket_stream->hostname);
184 if (socket_stream->schedule)
185 silc_schedule_task_del_by_fd(socket_stream->schedule, socket_stream->sock);
187 if (socket_stream->schedule)
188 silc_schedule_wakeup(socket_stream->schedule);
190 silc_free(socket_stream);
193 /* Sets stream notification callback for the stream */
195 SilcBool silc_socket_stream_notifier(SilcStream stream,
196 SilcSchedule schedule,
197 SilcStreamNotifier callback,
200 SilcSocketStream socket_stream = stream;
202 SILC_LOG_DEBUG(("Setting stream notifier callback"));
204 socket_stream->notifier = callback;
205 socket_stream->notifier_context = context;
206 socket_stream->schedule = schedule;
208 if (socket_stream->notifier && socket_stream->schedule) {
209 /* Add the socket to scheduler. Safe to call if already added. */
210 if (!silc_schedule_task_add_fd(socket_stream->schedule,
212 silc_socket_stream_io, socket_stream))
215 /* Initially set socket for reading */
216 if (!silc_schedule_set_listen_fd(socket_stream->schedule,
218 SILC_TASK_READ, FALSE))
220 } else if (socket_stream->schedule) {
221 /* Unschedule the socket */
222 silc_schedule_unset_listen_fd(socket_stream->schedule,
223 socket_stream->sock);
224 silc_schedule_task_del_by_fd(socket_stream->schedule,
225 socket_stream->sock);
228 if (socket_stream->schedule)
229 silc_schedule_wakeup(socket_stream->schedule);