--- /dev/null
+/*
+
+ silcwin32socketstream.c
+
+ Author: Pekka Riikonen <priikone@silcnet.org>
+
+ Copyright (C) 2007 Pekka Riikonen
+
+ 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.
+
+*/
+
+#include "silc.h"
+
+/************************ Static utility functions **************************/
+
+/* The IO process callback that calls the notifier callback to upper layer. */
+
+SILC_TASK_CALLBACK(silc_socket_stream_io)
+{
+ SilcSocketStream stream = context;
+
+ if (!stream->notifier)
+ return;
+
+ switch (type) {
+ case SILC_TASK_READ:
+ stream->notifier(stream, SILC_STREAM_CAN_READ, stream->notifier_context);
+ break;
+
+ case SILC_TASK_WRITE:
+ stream->notifier(stream, SILC_STREAM_CAN_WRITE, stream->notifier_context);
+ break;
+
+ default:
+ break;
+ }
+}
+
+/**************************** Stream Operations *****************************/
+
+/* Stream read operation */
+
+int silc_socket_stream_read(SilcStream stream, unsigned char *buf,
+ SilcUInt32 buf_len)
+{
+ SilcSocketStream sock = stream;
+ SOCKET fd = sock->sock;
+ int len, argp;
+
+ SILC_LOG_DEBUG(("Reading data from socket %d", fd));
+
+ /* Check whether there is data available, without calling recv(). */
+ ioctlsocket(fd, FIONREAD, (unsigned long *)&argp);
+ if (argp == 0) {
+ /* Is this kludge or what? Without this thing this contraption
+ does not work at all!?. */
+ SleepEx(1, TRUE);
+ SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
+ silc_schedule_set_listen_fd(sock->schedule, sock->sock,
+ silc_schedule_get_fd_events(sock->schedule,
+ sock->sock) |
+ SILC_TASK_READ, FALSE);
+ return -1;
+ }
+
+ /* Read the data from the socket. */
+ len = recv(fd, buf, buf_len, 0);
+ if (len == SOCKET_ERROR) {
+ len = WSAGetLastError();
+ if (len == WSAEWOULDBLOCK || len == WSAEINTR) {
+ SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
+ silc_schedule_set_listen_fd(sock->schedule, sock->sock,
+ silc_schedule_get_fd_events(sock->schedule,
+ sock->sock) |
+ SILC_TASK_READ, FALSE);
+ return -1;
+ }
+ SILC_LOG_DEBUG(("Cannot read from socket: %d", sock->sock));
+ silc_schedule_unset_listen_fd(sock->schedule, sock->sock);
+ sock->sock_error = len;
+ return -2;
+ }
+
+ SILC_LOG_DEBUG(("Read %d bytes", len));
+
+ if (!len)
+ silc_schedule_unset_listen_fd(sock->schedule, sock->sock);
+
+ return len;
+}
+
+/* Stream write operation */
+
+int silc_socket_stream_write(SilcStream stream, const unsigned char *data,
+ SilcUInt32 data_len)
+{
+ SilcSocketStream sock = stream;
+ SOCKET fd = sock->sock;
+ int ret;
+
+ SILC_LOG_DEBUG(("Writing data to socket %d", fd));
+
+ ret = send(fd, data, data_len, 0);
+ if (ret == SOCKET_ERROR) {
+ ret = WSAGetLastError();
+ if (ret == WSAEWOULDBLOCK) {
+ SILC_LOG_DEBUG(("Could not write immediately, will do it later"));
+ silc_schedule_set_listen_fd(sock->schedule, sock->sock,
+ SILC_TASK_READ | SILC_TASK_WRITE, FALSE);
+ return -1;
+ }
+ SILC_LOG_DEBUG(("Cannot write to socket"));
+ silc_schedule_unset_listen_fd(sock->schedule, sock->sock);
+ sock->sock_error = ret;
+ return -2;
+ }
+
+ SILC_LOG_DEBUG(("Wrote data %d bytes", ret));
+ if (silc_schedule_get_fd_events(sock->schedule, sock->sock) &
+ SILC_TASK_WRITE)
+ silc_schedule_set_listen_fd(sock->schedule, sock->sock,
+ SILC_TASK_READ, FALSE);
+
+ return ret;
+}
+
+/* Receive UDP packet. QoS is not supported. */
+
+int silc_socket_udp_stream_read(SilcStream stream, unsigned char *buf,
+ SilcUInt32 buf_len)
+{
+ return silc_net_udp_receive(stream, NULL, 0, NULL, buf, buf_len);
+}
+
+/* Send UDP packet. This always succeeds. */
+
+int silc_socket_udp_stream_write(SilcStream stream, const unsigned char *data,
+ SilcUInt32 data_len)
+{
+ SilcSocketStream sock = stream;
+
+ /* In connectionless state check if remote IP and port is provided */
+ if (!sock->connected && sock->ip && sock->port)
+ return silc_net_udp_send(stream, sock->ip, sock->port, data, data_len);
+
+ /* In connected state use normal writing to socket. */
+ return silc_socket_stream_write(stream, data, data_len);
+}
+
+/* Closes socket */
+
+SilcBool silc_socket_stream_close(SilcStream stream)
+{
+ SilcSocketStream socket_stream = stream;
+
+ if (socket_stream->schedule) {
+ silc_schedule_unset_listen_fd(socket_stream->schedule,
+ socket_stream->sock);
+ silc_schedule_task_del_by_fd(socket_stream->schedule,
+ socket_stream->sock);
+ }
+ silc_net_close_connection(socket_stream->sock);
+
+ return TRUE;
+}
+
+/* Destroys the stream */
+
+void silc_socket_stream_destroy(SilcStream stream)
+{
+ SilcSocketStream socket_stream = stream;
+
+ silc_socket_stream_close(socket_stream);
+ silc_free(socket_stream->ip);
+ silc_free(socket_stream->hostname);
+ if (socket_stream->schedule)
+ silc_schedule_task_del_by_fd(socket_stream->schedule, socket_stream->sock);
+
+ if (socket_stream->schedule)
+ silc_schedule_wakeup(socket_stream->schedule);
+
+ silc_free(socket_stream);
+}
+
+/* Sets stream notification callback for the stream */
+
+SilcBool silc_socket_stream_notifier(SilcStream stream,
+ SilcSchedule schedule,
+ SilcStreamNotifier callback,
+ void *context)
+{
+ SilcSocketStream socket_stream = stream;
+
+ SILC_LOG_DEBUG(("Setting stream notifier callback"));
+
+ socket_stream->notifier = callback;
+ socket_stream->notifier_context = context;
+ socket_stream->schedule = schedule;
+
+ if (socket_stream->notifier && socket_stream->schedule) {
+ /* Add the socket to scheduler. Safe to call if already added. */
+ if (!silc_schedule_task_add_fd(socket_stream->schedule,
+ socket_stream->sock,
+ silc_socket_stream_io, socket_stream))
+ return FALSE;
+
+ /* Initially set socket for reading */
+ if (!silc_schedule_set_listen_fd(socket_stream->schedule,
+ socket_stream->sock,
+ SILC_TASK_READ, FALSE))
+ return FALSE;
+ } else if (socket_stream->schedule) {
+ /* Unschedule the socket */
+ silc_schedule_unset_listen_fd(socket_stream->schedule,
+ socket_stream->sock);
+ silc_schedule_task_del_by_fd(socket_stream->schedule,
+ socket_stream->sock);
+ }
+
+ if (socket_stream->schedule)
+ silc_schedule_wakeup(socket_stream->schedule);
+
+ return TRUE;
+}
projects / silc.git / blobdiff