+++ /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);
- silc_set_errno(SILC_ERR_WOULD_BLOCK);
- return -1;
- }
-
- /* Read the data from the socket. */
- len = recv(fd, buf, buf_len, 0);
- if (len == SOCKET_ERROR) {
- len = WSAGetLastError();
- silc_set_errno_posix(ret);
- 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);
- 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();
- silc_set_errno_posix(ret);
- 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);
- 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 / crypto.git / blobdiff