4e6e5be654
* New configuration to intercept certain channels * Added rdpdr intercept implementation
593 lines
16 KiB
C
593 lines
16 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* FreeRDP Proxy Server modules API
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*
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* Copyright 2019 Kobi Mizrachi <kmizrachi18@gmail.com>
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* Copyright 2019 Idan Freiberg <speidy@gmail.com>
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* Copyright 2021 Armin Novak <anovak@thincast.com>
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* Copyright 2021 Thincast Technologies GmbH
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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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#include <winpr/assert.h>
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#include <winpr/file.h>
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#include <winpr/wlog.h>
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#include <winpr/path.h>
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#include <winpr/library.h>
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#include <freerdp/api.h>
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#include <freerdp/build-config.h>
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#include <freerdp/server/proxy/proxy_log.h>
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#include <freerdp/server/proxy/proxy_modules_api.h>
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#include <freerdp/server/proxy/proxy_context.h>
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#include "proxy_modules.h"
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#define TAG PROXY_TAG("modules")
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#define MODULE_ENTRY_POINT "proxy_module_entry_point"
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struct proxy_module
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{
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proxyPluginsManager mgr;
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wArrayList* plugins;
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wArrayList* handles;
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};
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static const char* pf_modules_get_filter_type_string(PF_FILTER_TYPE result)
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{
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switch (result)
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{
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case FILTER_TYPE_KEYBOARD:
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return "FILTER_TYPE_KEYBOARD";
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case FILTER_TYPE_MOUSE:
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return "FILTER_TYPE_MOUSE";
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case FILTER_TYPE_CLIENT_PASSTHROUGH_CHANNEL_DATA:
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return "FILTER_TYPE_CLIENT_PASSTHROUGH_CHANNEL_DATA";
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case FILTER_TYPE_SERVER_PASSTHROUGH_CHANNEL_DATA:
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return "FILTER_TYPE_SERVER_PASSTHROUGH_CHANNEL_DATA";
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case FILTER_TYPE_CLIENT_PASSTHROUGH_DYN_CHANNEL_CREATE:
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return "FILTER_TYPE_CLIENT_PASSTHROUGH_DYN_CHANNEL_CREATE";
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case FILTER_TYPE_SERVER_FETCH_TARGET_ADDR:
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return "FILTER_TYPE_SERVER_FETCH_TARGET_ADDR";
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case FILTER_TYPE_SERVER_PEER_LOGON:
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return "FILTER_TYPE_SERVER_PEER_LOGON";
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case FILTER_TYPE_CLIENT_PASSTHROUGH_CHANNEL_CREATE:
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return "FILTER_TYPE_CLIENT_PASSTHROUGH_CHANNEL_CREATE";
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case FILTER_LAST:
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return "FILTER_LAST";
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default:
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return "FILTER_UNKNOWN";
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}
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}
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static const char* pf_modules_get_hook_type_string(PF_HOOK_TYPE result)
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{
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switch (result)
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{
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case HOOK_TYPE_CLIENT_INIT_CONNECT:
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return "HOOK_TYPE_CLIENT_INIT_CONNECT";
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case HOOK_TYPE_CLIENT_UNINIT_CONNECT:
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return "HOOK_TYPE_CLIENT_UNINIT_CONNECT";
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case HOOK_TYPE_CLIENT_PRE_CONNECT:
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return "HOOK_TYPE_CLIENT_PRE_CONNECT";
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case HOOK_TYPE_CLIENT_POST_CONNECT:
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return "HOOK_TYPE_CLIENT_POST_CONNECT";
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case HOOK_TYPE_CLIENT_POST_DISCONNECT:
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return "HOOK_TYPE_CLIENT_POST_DISCONNECT";
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case HOOK_TYPE_CLIENT_REDIRECT:
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return "HOOK_TYPE_CLIENT_REDIRECT";
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case HOOK_TYPE_CLIENT_VERIFY_X509:
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return "HOOK_TYPE_CLIENT_VERIFY_X509";
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case HOOK_TYPE_CLIENT_LOGIN_FAILURE:
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return "HOOK_TYPE_CLIENT_LOGIN_FAILURE";
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case HOOK_TYPE_CLIENT_END_PAINT:
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return "HOOK_TYPE_CLIENT_END_PAINT";
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case HOOK_TYPE_SERVER_POST_CONNECT:
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return "HOOK_TYPE_SERVER_POST_CONNECT";
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case HOOK_TYPE_SERVER_ACTIVATE:
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return "HOOK_TYPE_SERVER_ACTIVATE";
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case HOOK_TYPE_SERVER_CHANNELS_INIT:
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return "HOOK_TYPE_SERVER_CHANNELS_INIT";
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case HOOK_TYPE_SERVER_CHANNELS_FREE:
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return "HOOK_TYPE_SERVER_CHANNELS_FREE";
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case HOOK_TYPE_SERVER_SESSION_END:
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return "HOOK_TYPE_SERVER_SESSION_END";
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case HOOK_LAST:
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return "HOOK_LAST";
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default:
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return "HOOK_TYPE_UNKNOWN";
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}
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}
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static BOOL pf_modules_proxy_ArrayList_ForEachFkt(void* data, size_t index, va_list ap)
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{
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proxyPlugin* plugin = (proxyPlugin*)data;
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PF_HOOK_TYPE type;
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proxyData* pdata;
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void* custom;
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BOOL ok = FALSE;
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WINPR_UNUSED(index);
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type = va_arg(ap, PF_HOOK_TYPE);
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pdata = va_arg(ap, proxyData*);
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custom = va_arg(ap, void*);
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WLog_VRB(TAG, "running hook %s.%s", plugin->name, pf_modules_get_hook_type_string(type));
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switch (type)
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{
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case HOOK_TYPE_CLIENT_INIT_CONNECT:
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ok = IFCALLRESULT(TRUE, plugin->ClientInitConnect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_UNINIT_CONNECT:
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ok = IFCALLRESULT(TRUE, plugin->ClientUninitConnect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_PRE_CONNECT:
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ok = IFCALLRESULT(TRUE, plugin->ClientPreConnect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_POST_CONNECT:
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ok = IFCALLRESULT(TRUE, plugin->ClientPostConnect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_REDIRECT:
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ok = IFCALLRESULT(TRUE, plugin->ClientRedirect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_POST_DISCONNECT:
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ok = IFCALLRESULT(TRUE, plugin->ClientPostDisconnect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_VERIFY_X509:
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ok = IFCALLRESULT(TRUE, plugin->ClientX509Certificate, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_LOGIN_FAILURE:
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ok = IFCALLRESULT(TRUE, plugin->ClientLoginFailure, plugin, pdata, custom);
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break;
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case HOOK_TYPE_CLIENT_END_PAINT:
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ok = IFCALLRESULT(TRUE, plugin->ClientEndPaint, plugin, pdata, custom);
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break;
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case HOOK_TYPE_SERVER_POST_CONNECT:
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ok = IFCALLRESULT(TRUE, plugin->ServerPostConnect, plugin, pdata, custom);
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break;
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case HOOK_TYPE_SERVER_ACTIVATE:
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ok = IFCALLRESULT(TRUE, plugin->ServerPeerActivate, plugin, pdata, custom);
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break;
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case HOOK_TYPE_SERVER_CHANNELS_INIT:
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ok = IFCALLRESULT(TRUE, plugin->ServerChannelsInit, plugin, pdata, custom);
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break;
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case HOOK_TYPE_SERVER_CHANNELS_FREE:
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ok = IFCALLRESULT(TRUE, plugin->ServerChannelsFree, plugin, pdata, custom);
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break;
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case HOOK_TYPE_SERVER_SESSION_END:
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ok = IFCALLRESULT(TRUE, plugin->ServerSessionEnd, plugin, pdata, custom);
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break;
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case HOOK_LAST:
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default:
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WLog_ERR(TAG, "invalid hook called");
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}
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if (!ok)
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{
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WLog_INFO(TAG, "plugin %s, hook %s failed!", plugin->name,
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pf_modules_get_hook_type_string(type));
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return FALSE;
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}
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return TRUE;
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}
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/*
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* runs all hooks of type `type`.
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*
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* @type: hook type to run.
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* @server: pointer of server's rdpContext struct of the current session.
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*/
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BOOL pf_modules_run_hook(proxyModule* module, PF_HOOK_TYPE type, proxyData* pdata, void* custom)
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{
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WINPR_ASSERT(module);
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WINPR_ASSERT(module->plugins);
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return ArrayList_ForEach(module->plugins, pf_modules_proxy_ArrayList_ForEachFkt, type, pdata,
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custom);
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}
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static BOOL pf_modules_ArrayList_ForEachFkt(void* data, size_t index, va_list ap)
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{
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proxyPlugin* plugin = (proxyPlugin*)data;
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PF_FILTER_TYPE type;
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proxyData* pdata;
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void* param;
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BOOL result = FALSE;
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WINPR_UNUSED(index);
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type = va_arg(ap, PF_FILTER_TYPE);
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pdata = va_arg(ap, proxyData*);
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param = va_arg(ap, void*);
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WLog_VRB(TAG, "[%s]: running filter: %s", __FUNCTION__, plugin->name);
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switch (type)
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{
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case FILTER_TYPE_KEYBOARD:
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result = IFCALLRESULT(TRUE, plugin->KeyboardEvent, plugin, pdata, param);
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break;
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case FILTER_TYPE_MOUSE:
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result = IFCALLRESULT(TRUE, plugin->MouseEvent, plugin, pdata, param);
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break;
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case FILTER_TYPE_CLIENT_PASSTHROUGH_CHANNEL_DATA:
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result = IFCALLRESULT(TRUE, plugin->ClientChannelData, plugin, pdata, param);
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break;
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case FILTER_TYPE_SERVER_PASSTHROUGH_CHANNEL_DATA:
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result = IFCALLRESULT(TRUE, plugin->ServerChannelData, plugin, pdata, param);
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break;
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case FILTER_TYPE_CLIENT_PASSTHROUGH_CHANNEL_CREATE:
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result = IFCALLRESULT(TRUE, plugin->ChannelCreate, plugin, pdata, param);
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break;
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case FILTER_TYPE_CLIENT_PASSTHROUGH_DYN_CHANNEL_CREATE:
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result = IFCALLRESULT(TRUE, plugin->DynamicChannelCreate, plugin, pdata, param);
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break;
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case FILTER_TYPE_SERVER_FETCH_TARGET_ADDR:
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result = IFCALLRESULT(TRUE, plugin->ServerFetchTargetAddr, plugin, pdata, param);
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break;
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case FILTER_TYPE_SERVER_PEER_LOGON:
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result = IFCALLRESULT(TRUE, plugin->ServerPeerLogon, plugin, pdata, param);
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break;
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case FILTER_LAST:
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default:
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WLog_ERR(TAG, "invalid filter called");
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}
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if (!result)
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{
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/* current filter return FALSE, no need to run other filters. */
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WLog_DBG(TAG, "plugin %s, filter type [%s] returned FALSE", plugin->name,
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pf_modules_get_filter_type_string(type));
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}
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return result;
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}
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/*
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* runs all filters of type `type`.
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*
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* @type: filter type to run.
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* @server: pointer of server's rdpContext struct of the current session.
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*/
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BOOL pf_modules_run_filter(proxyModule* module, PF_FILTER_TYPE type, proxyData* pdata, void* param)
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{
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WINPR_ASSERT(module);
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WINPR_ASSERT(module->plugins);
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return ArrayList_ForEach(module->plugins, pf_modules_ArrayList_ForEachFkt, type, pdata, param);
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}
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/*
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* stores per-session data needed by a plugin.
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*
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* @context: current session server's rdpContext instance.
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* @info: pointer to per-session data.
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*/
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static BOOL pf_modules_set_plugin_data(proxyPluginsManager* mgr, const char* plugin_name,
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proxyData* pdata, void* data)
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{
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union {
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const char* ccp;
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char* cp;
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} ccharconv;
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WINPR_ASSERT(plugin_name);
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ccharconv.ccp = plugin_name;
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if (data == NULL) /* no need to store anything */
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return FALSE;
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if (!HashTable_Insert(pdata->modules_info, ccharconv.cp, data))
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{
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WLog_ERR(TAG, "[%s]: HashTable_Insert failed!");
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return FALSE;
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}
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return TRUE;
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}
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/*
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* returns per-session data needed a plugin.
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*
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* @context: current session server's rdpContext instance.
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* if there's no data related to `plugin_name` in `context` (current session), a NULL will be
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* returned.
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*/
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static void* pf_modules_get_plugin_data(proxyPluginsManager* mgr, const char* plugin_name,
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proxyData* pdata)
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{
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union {
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const char* ccp;
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char* cp;
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} ccharconv;
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WINPR_ASSERT(plugin_name);
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WINPR_ASSERT(pdata);
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ccharconv.ccp = plugin_name;
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return HashTable_GetItemValue(pdata->modules_info, ccharconv.cp);
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}
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static void pf_modules_abort_connect(proxyPluginsManager* mgr, proxyData* pdata)
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{
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WINPR_ASSERT(pdata);
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WLog_DBG(TAG, "%s is called!", __FUNCTION__);
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proxy_data_abort_connect(pdata);
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}
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static BOOL pf_modules_register_ArrayList_ForEachFkt(void* data, size_t index, va_list ap)
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{
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proxyPlugin* plugin = (proxyPlugin*)data;
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proxyPlugin* plugin_to_register = va_arg(ap, proxyPlugin*);
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WINPR_UNUSED(index);
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if (strcmp(plugin->name, plugin_to_register->name) == 0)
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{
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WLog_ERR(TAG, "can not register plugin '%s', it is already registered!", plugin->name);
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return FALSE;
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}
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return TRUE;
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}
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static BOOL pf_modules_register_plugin(proxyPluginsManager* mgr,
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const proxyPlugin* plugin_to_register)
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{
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proxyPlugin internal = { 0 };
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proxyModule* module = (proxyModule*)mgr;
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WINPR_ASSERT(module);
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if (!plugin_to_register)
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return FALSE;
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internal = *plugin_to_register;
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internal.mgr = mgr;
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/* make sure there's no other loaded plugin with the same name of `plugin_to_register`. */
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if (!ArrayList_ForEach(module->plugins, pf_modules_register_ArrayList_ForEachFkt, &internal))
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return FALSE;
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if (!ArrayList_Append(module->plugins, &internal))
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{
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WLog_ERR(TAG, "[%s]: failed adding plugin to list: %s", __FUNCTION__,
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plugin_to_register->name);
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return FALSE;
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}
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return TRUE;
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}
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static BOOL pf_modules_load_ArrayList_ForEachFkt(void* data, size_t index, va_list ap)
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{
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proxyPlugin* plugin = (proxyPlugin*)data;
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const char* plugin_name = va_arg(ap, const char*);
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WINPR_UNUSED(index);
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WINPR_UNUSED(ap);
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if (strcmp(plugin->name, plugin_name) == 0)
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return TRUE;
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return FALSE;
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}
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BOOL pf_modules_is_plugin_loaded(proxyModule* module, const char* plugin_name)
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{
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WINPR_ASSERT(module);
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if (ArrayList_Count(module->plugins) < 1)
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return FALSE;
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return ArrayList_ForEach(module->plugins, pf_modules_load_ArrayList_ForEachFkt, plugin_name);
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}
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static BOOL pf_modules_print_ArrayList_ForEachFkt(void* data, size_t index, va_list ap)
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{
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proxyPlugin* plugin = (proxyPlugin*)data;
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WINPR_UNUSED(index);
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WINPR_UNUSED(ap);
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WLog_INFO(TAG, "\tName: %s", plugin->name);
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WLog_INFO(TAG, "\tDescription: %s", plugin->description);
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return TRUE;
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}
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void pf_modules_list_loaded_plugins(proxyModule* module)
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{
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size_t count;
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WINPR_ASSERT(module);
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WINPR_ASSERT(module->plugins);
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count = ArrayList_Count(module->plugins);
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if (count > 0)
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WLog_INFO(TAG, "Loaded plugins:");
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ArrayList_ForEach(module->plugins, pf_modules_print_ArrayList_ForEachFkt);
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}
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static BOOL pf_modules_load_module(const char* module_path, proxyModule* module, void* userdata)
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{
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HMODULE handle = NULL;
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proxyModuleEntryPoint pEntryPoint;
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WINPR_ASSERT(module);
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handle = LoadLibraryX(module_path);
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if (handle == NULL)
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{
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WLog_ERR(TAG, "[%s]: failed loading external library: %s", __FUNCTION__, module_path);
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return FALSE;
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}
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pEntryPoint = (proxyModuleEntryPoint)GetProcAddress(handle, MODULE_ENTRY_POINT);
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if (!pEntryPoint)
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{
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WLog_ERR(TAG, "[%s]: GetProcAddress failed while loading %s", __FUNCTION__, module_path);
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goto error;
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}
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if (!ArrayList_Append(module->handles, handle))
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{
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WLog_ERR(TAG, "ArrayList_Append failed!");
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goto error;
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}
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return pf_modules_add(module, pEntryPoint, userdata);
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error:
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FreeLibrary(handle);
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return FALSE;
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}
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static void free_handle(void* obj)
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{
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HANDLE handle = (HANDLE)obj;
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if (handle)
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FreeLibrary(handle);
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}
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static void free_plugin(void* obj)
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{
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proxyPlugin* plugin = (proxyPlugin*)obj;
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WINPR_ASSERT(plugin);
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if (!IFCALLRESULT(TRUE, plugin->PluginUnload, plugin))
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WLog_WARN(TAG, "PluginUnload failed for plugin '%s'", plugin->name);
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free(plugin);
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}
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static void* new_plugin(const void* obj)
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{
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const proxyPlugin* src = obj;
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proxyPlugin* proxy = calloc(1, sizeof(proxyPlugin));
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if (!proxy)
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return NULL;
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*proxy = *src;
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return proxy;
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}
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proxyModule* pf_modules_new(const char* root_dir, const char** modules, size_t count)
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{
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size_t i;
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wObject* obj;
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char* path = NULL;
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proxyModule* module = calloc(1, sizeof(proxyModule));
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if (!module)
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return NULL;
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module->mgr.RegisterPlugin = pf_modules_register_plugin;
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module->mgr.SetPluginData = pf_modules_set_plugin_data;
|
|
module->mgr.GetPluginData = pf_modules_get_plugin_data;
|
|
module->mgr.AbortConnect = pf_modules_abort_connect;
|
|
module->plugins = ArrayList_New(FALSE);
|
|
|
|
if (module->plugins == NULL)
|
|
{
|
|
WLog_ERR(TAG, "[%s]: ArrayList_New failed!", __FUNCTION__);
|
|
goto error;
|
|
}
|
|
obj = ArrayList_Object(module->plugins);
|
|
WINPR_ASSERT(obj);
|
|
|
|
obj->fnObjectFree = free_plugin;
|
|
obj->fnObjectNew = new_plugin;
|
|
|
|
module->handles = ArrayList_New(FALSE);
|
|
if (module->handles == NULL)
|
|
{
|
|
|
|
WLog_ERR(TAG, "[%s]: ArrayList_New failed!", __FUNCTION__);
|
|
goto error;
|
|
}
|
|
ArrayList_Object(module->handles)->fnObjectFree = free_handle;
|
|
|
|
if (count > 0)
|
|
{
|
|
WINPR_ASSERT(root_dir);
|
|
if (!winpr_PathFileExists(root_dir))
|
|
path = GetCombinedPath(FREERDP_INSTALL_PREFIX, root_dir);
|
|
else
|
|
path = _strdup(root_dir);
|
|
|
|
if (!winpr_PathFileExists(path))
|
|
{
|
|
if (!winpr_PathMakePath(path, NULL))
|
|
{
|
|
WLog_ERR(TAG, "error occurred while creating modules directory: %s", root_dir);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
if (winpr_PathFileExists(path))
|
|
WLog_DBG(TAG, "modules root directory: %s", path);
|
|
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
char name[8192] = { 0 };
|
|
char* fullpath;
|
|
_snprintf(name, sizeof(name), "proxy-%s-plugin%s", modules[i],
|
|
FREERDP_SHARED_LIBRARY_SUFFIX);
|
|
fullpath = GetCombinedPath(path, name);
|
|
pf_modules_load_module(fullpath, module, NULL);
|
|
free(fullpath);
|
|
}
|
|
}
|
|
|
|
free(path);
|
|
return module;
|
|
|
|
error:
|
|
free(path);
|
|
pf_modules_free(module);
|
|
return NULL;
|
|
}
|
|
|
|
void pf_modules_free(proxyModule* module)
|
|
{
|
|
if (!module)
|
|
return;
|
|
|
|
ArrayList_Free(module->plugins);
|
|
ArrayList_Free(module->handles);
|
|
free(module);
|
|
}
|
|
|
|
BOOL pf_modules_add(proxyModule* module, proxyModuleEntryPoint ep, void* userdata)
|
|
{
|
|
WINPR_ASSERT(module);
|
|
WINPR_ASSERT(ep);
|
|
|
|
return ep(&module->mgr, userdata);
|
|
}
|