165 lines
4.1 KiB
C
165 lines
4.1 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Echo Virtual Channel Extension
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*
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* Copyright 2013 Christian Hofstaedtler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <winpr/crt.h>
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#include <winpr/stream.h>
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#include <winpr/cmdline.h>
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#include <freerdp/addin.h>
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#include "echo_main.h"
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typedef struct _ECHO_LISTENER_CALLBACK ECHO_LISTENER_CALLBACK;
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struct _ECHO_LISTENER_CALLBACK
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{
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IWTSListenerCallback iface;
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IWTSPlugin* plugin;
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IWTSVirtualChannelManager* channel_mgr;
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};
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typedef struct _ECHO_CHANNEL_CALLBACK ECHO_CHANNEL_CALLBACK;
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struct _ECHO_CHANNEL_CALLBACK
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{
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IWTSVirtualChannelCallback iface;
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IWTSPlugin* plugin;
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IWTSVirtualChannelManager* channel_mgr;
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IWTSVirtualChannel* channel;
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};
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typedef struct _ECHO_PLUGIN ECHO_PLUGIN;
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struct _ECHO_PLUGIN
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{
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IWTSPlugin iface;
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ECHO_LISTENER_CALLBACK* listener_callback;
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};
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static int echo_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream *data)
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{
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int status;
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ECHO_CHANNEL_CALLBACK* callback = (ECHO_CHANNEL_CALLBACK*) pChannelCallback;
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BYTE* pBuffer = Stream_Pointer(data);
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UINT32 cbSize = Stream_GetRemainingLength(data);
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/* echo back what we have received. ECHO does not have any message IDs. */
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status = callback->channel->Write(callback->channel, cbSize, pBuffer, NULL);
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return status;
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}
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static int echo_on_close(IWTSVirtualChannelCallback* pChannelCallback)
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{
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ECHO_CHANNEL_CALLBACK* callback = (ECHO_CHANNEL_CALLBACK*) pChannelCallback;
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free(callback);
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return 0;
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}
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static int echo_on_new_channel_connection(IWTSListenerCallback* pListenerCallback,
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IWTSVirtualChannel* pChannel, BYTE* Data, int* pbAccept,
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IWTSVirtualChannelCallback** ppCallback)
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{
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ECHO_CHANNEL_CALLBACK* callback;
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ECHO_LISTENER_CALLBACK* listener_callback = (ECHO_LISTENER_CALLBACK*) pListenerCallback;
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callback = (ECHO_CHANNEL_CALLBACK*) calloc(1, sizeof(ECHO_CHANNEL_CALLBACK));
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if (!callback)
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return -1;
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callback->iface.OnDataReceived = echo_on_data_received;
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callback->iface.OnClose = echo_on_close;
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callback->plugin = listener_callback->plugin;
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callback->channel_mgr = listener_callback->channel_mgr;
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callback->channel = pChannel;
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*ppCallback = (IWTSVirtualChannelCallback*) callback;
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return 0;
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}
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static int echo_plugin_initialize(IWTSPlugin* pPlugin, IWTSVirtualChannelManager* pChannelMgr)
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{
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ECHO_PLUGIN* echo = (ECHO_PLUGIN*) pPlugin;
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echo->listener_callback = (ECHO_LISTENER_CALLBACK*) calloc(1, sizeof(ECHO_LISTENER_CALLBACK));
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if (!echo->listener_callback)
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return -1;
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echo->listener_callback->iface.OnNewChannelConnection = echo_on_new_channel_connection;
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echo->listener_callback->plugin = pPlugin;
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echo->listener_callback->channel_mgr = pChannelMgr;
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return pChannelMgr->CreateListener(pChannelMgr, "ECHO", 0,
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(IWTSListenerCallback*) echo->listener_callback, NULL);
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}
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static int echo_plugin_terminated(IWTSPlugin* pPlugin)
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{
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ECHO_PLUGIN* echo = (ECHO_PLUGIN*) pPlugin;
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if (echo)
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{
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free(echo);
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}
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return 0;
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}
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#ifdef STATIC_CHANNELS
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#define DVCPluginEntry echo_DVCPluginEntry
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#endif
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int DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints)
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{
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int status = 0;
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ECHO_PLUGIN* echo;
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echo = (ECHO_PLUGIN*) pEntryPoints->GetPlugin(pEntryPoints, "echo");
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if (!echo)
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{
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echo = (ECHO_PLUGIN*) calloc(1, sizeof(ECHO_PLUGIN));
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if (!echo)
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return -1;
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echo->iface.Initialize = echo_plugin_initialize;
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echo->iface.Connected = NULL;
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echo->iface.Disconnected = NULL;
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echo->iface.Terminated = echo_plugin_terminated;
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status = pEntryPoints->RegisterPlugin(pEntryPoints, "echo", (IWTSPlugin*) echo);
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}
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return status;
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}
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