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-rw-r--r--nxcomp/ClientProxy.cpp538
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diff --git a/nxcomp/ClientProxy.cpp b/nxcomp/ClientProxy.cpp
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+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/. */
+/* */
+/* NXCOMP, NX protocol compression and NX extensions to this software */
+/* are copyright of NoMachine. Redistribution and use of the present */
+/* software is allowed according to terms specified in the file LICENSE */
+/* which comes in the source distribution. */
+/* */
+/* Check http://www.nomachine.com/licensing.html for applicability. */
+/* */
+/* NX and NoMachine are trademarks of Medialogic S.p.A. */
+/* */
+/* All rights reserved. */
+/* */
+/**************************************************************************/
+
+#include "Socket.h"
+#include "Agent.h"
+
+#include "ClientProxy.h"
+
+#include "ClientChannel.h"
+#include "GenericChannel.h"
+
+//
+// Set the verbosity level.
+//
+
+#define PANIC
+#define WARNING
+#undef TEST
+#undef DEBUG
+
+//
+// Log the operations related to sending
+// and receiving the control tokens.
+//
+
+#undef TOKEN
+
+ClientProxy::ClientProxy(int proxyFd) : Proxy(proxyFd)
+{
+ fontServerPort_ = NULL;
+
+ #ifdef DEBUG
+ *logofs << "ClientProxy: Created new object at " << this
+ << ".\n" << logofs_flush;
+ #endif
+}
+
+ClientProxy::~ClientProxy()
+{
+ delete [] fontServerPort_;
+
+ #ifdef DEBUG
+ *logofs << "ClientProxy: Deleted object at " << this
+ << ".\n" << logofs_flush;
+ #endif
+}
+
+void ClientProxy::handleDisplayConfiguration(const char *xServerDisplay, int xServerAddrFamily,
+ sockaddr * xServerAddr, unsigned int xServerAddrLength)
+{
+ #ifdef DEBUG
+ *logofs << "ClientProxy: No display configuration to set.\n"
+ << logofs_flush;
+ #endif
+}
+
+void ClientProxy::handlePortConfiguration(int cupsServerPort, int smbServerPort, int mediaServerPort,
+ int httpServerPort, const char *fontServerPort)
+{
+ delete [] fontServerPort_;
+
+ fontServerPort_ = new char[strlen(fontServerPort) + 1];
+
+ strcpy(fontServerPort_, fontServerPort);
+
+ #ifdef DEBUG
+ *logofs << "ClientProxy: Set port configuration to font '"
+ << fontServerPort_ << "'.\n"
+ << logofs_flush;
+ #endif
+}
+
+int ClientProxy::handleNewConnection(T_channel_type type, int clientFd)
+{
+ switch (type)
+ {
+ case channel_x11:
+ {
+ return handleNewXConnection(clientFd);
+ }
+ case channel_cups:
+ {
+ return handleNewGenericConnection(clientFd, channel_cups, "CUPS");
+ }
+ case channel_smb:
+ {
+ return handleNewGenericConnection(clientFd, channel_smb, "SMB");
+ }
+ case channel_media:
+ {
+ return handleNewGenericConnection(clientFd, channel_media, "media");
+ }
+ case channel_http:
+ {
+ return handleNewGenericConnection(clientFd, channel_http, "HTTP");
+ }
+ case channel_slave:
+ {
+ return handleNewSlaveConnection(clientFd);
+ }
+ default:
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Unsupported channel with type '"
+ << getTypeName(type) << "'.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Unsupported channel with type '"
+ << getTypeName(type) << "'.\n";
+
+ return -1;
+ }
+ }
+}
+
+int ClientProxy::handleNewConnectionFromProxy(T_channel_type type, int channelId)
+{
+ switch (type)
+ {
+ case channel_font:
+ {
+ int port = atoi(fontServerPort_);
+
+ if (port > 0)
+ {
+ //
+ // Connect on the TCP port number.
+ //
+
+ return handleNewGenericConnectionFromProxy(channelId, channel_font, "localhost",
+ port, "font");
+ }
+ else
+ {
+ //
+ // Connect to the Unix path.
+ //
+
+ return handleNewGenericConnectionFromProxy(channelId, channel_font, "localhost",
+ fontServerPort_, "font");
+ }
+ }
+ case channel_slave:
+ {
+ return handleNewSlaveConnectionFromProxy(channelId);
+ }
+ default:
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Unsupported channel with type '"
+ << getTypeName(type) << "'.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Unsupported channel with type '"
+ << getTypeName(type) << "'.\n";
+
+ return -1;
+ }
+ }
+}
+
+int ClientProxy::handleNewAgentConnection(Agent *agent)
+{
+ int clientFd = agent -> getLocalFd();
+
+ int channelId = allocateChannelMap(clientFd);
+
+ if (channelId == -1)
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Maximum mumber of available "
+ << "channels exceeded.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Maximum mumber of available "
+ << "channels exceeded.\n";
+
+ return -1;
+ }
+
+ transports_[channelId] = agent -> getTransport();
+
+ agent_ = channelId;
+
+ return handleNewXConnection(clientFd);
+}
+
+int ClientProxy::handleNewXConnection(int clientFd)
+{
+ int channelId = getChannel(clientFd);
+
+ //
+ // Check if the channel has been
+ // already mapped.
+ //
+
+ if (channelId == -1)
+ {
+ channelId = allocateChannelMap(clientFd);
+
+ if (channelId == -1)
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Maximum mumber of available "
+ << "channels exceeded.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Maximum mumber of available "
+ << "channels exceeded.\n";
+
+ return -1;
+ }
+ }
+
+ #ifdef TEST
+ *logofs << "ClientProxy: X client descriptor FD#" << clientFd
+ << " mapped to channel ID#" << channelId << ".\n"
+ << logofs_flush;
+ #endif
+
+ //
+ // Turn queuing off for path proxy-to-X-client.
+ //
+
+ if (control -> OptionClientNoDelay == 1)
+ {
+ SetNoDelay(clientFd, control -> OptionClientNoDelay);
+ }
+
+ //
+ // If requested, set the size of the TCP send
+ // and receive buffers.
+ //
+
+ if (control -> OptionClientSendBuffer != -1)
+ {
+ SetSendBuffer(clientFd, control -> OptionClientSendBuffer);
+ }
+
+ if (control -> OptionClientReceiveBuffer != -1)
+ {
+ SetReceiveBuffer(clientFd, control -> OptionClientReceiveBuffer);
+ }
+
+ if (allocateTransport(clientFd, channelId) < 0)
+ {
+ return -1;
+ }
+
+ //
+ // Starting from protocol level 3 client and server
+ // caches are created in proxy and shared between all
+ // channels. If remote proxy has older protocol level
+ // pointers are NULL and channels must create their
+ // own instances.
+ //
+
+ channels_[channelId] = new ClientChannel(transports_[channelId], compressor_);
+
+ if (channels_[channelId] == NULL)
+ {
+ deallocateTransport(channelId);
+
+ return -1;
+ }
+
+ increaseChannels(channelId);
+
+ //
+ // Propagate channel stores and caches to the new
+ // channel.
+ //
+
+ channels_[channelId] -> setOpcodes(opcodeStore_);
+
+ channels_[channelId] -> setStores(clientStore_, serverStore_);
+
+ channels_[channelId] -> setCaches(clientCache_, serverCache_);
+
+ int port = atoi(fontServerPort_);
+
+ if (port > 0 || *fontServerPort_ != '\0')
+ {
+ channels_[channelId] -> setPorts(1);
+ }
+
+ if (handleControl(code_new_x_connection, channelId) < 0)
+ {
+ return -1;
+ }
+
+ //
+ // Let channel configure itself according
+ // to control parameters.
+ //
+
+ channels_[channelId] -> handleConfiguration();
+
+ return 1;
+}
+
+int ClientProxy::handleNewXConnectionFromProxy(int channelId)
+{
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Can't create a new X channel "
+ << "with ID#" << channelId << " at this side.\n"
+ << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Can't create a new X channel "
+ << "with ID#" << channelId << " at this side.\n";
+
+ return -1;
+}
+
+int ClientProxy::handleLoad(T_load_type type)
+{
+ int channelCount = getChannels(channel_x11);
+
+ if ((channelCount == 0 && type == load_if_first) ||
+ (channelCount > 0 && type == load_if_any))
+ {
+ #ifdef TEST
+ *logofs << "ClientProxy: Going to load content of client store.\n"
+ << logofs_flush;
+ #endif
+
+ int result = handleLoadStores();
+
+ if (result == 1)
+ {
+ if (handleControl(code_load_request) < 0)
+ {
+ return -1;
+ }
+
+ priority_ = 1;
+ }
+ else if (result < 0)
+ {
+ #ifdef WARNING
+ *logofs << "ClientProxy: WARNING! Failed to load content "
+ << "of persistent cache.\n" << logofs_flush;
+ #endif
+
+ //
+ // Don't abort the proxy connection in the case
+ // of a corrupted cache. By not sending the load
+ // message to the remote peer, both sides will
+ // start encoding messages using empty stores.
+ // This behaviour is compatible with old proxy
+ // versions.
+ //
+
+ if (channelCount == 0 && type == load_if_first)
+ {
+ if (handleResetStores() < 0)
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Failed to reset message stores.\n"
+ << logofs_flush;
+ #endif
+
+ return -1;
+ }
+ }
+ else
+ {
+ return -1;
+ }
+ }
+ }
+ else
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Can't load the stores with "
+ << channelCount << " remaining channels.\n"
+ << logofs_flush;
+ #endif
+
+ return -1;
+ }
+
+ return 1;
+}
+
+int ClientProxy::handleSave()
+{
+ //
+ // If no more X channels are remaining
+ // then save content of message stores.
+ //
+
+ int channelCount = getChannels(channel_x11);
+
+ if (channelCount == 0)
+ {
+ int result = handleSaveStores();
+
+ if (result == 1)
+ {
+ if (handleControl(code_save_request) < 0)
+ {
+ return -1;
+ }
+
+ priority_ = 1;
+
+ return 1;
+ }
+ else if (result < 0)
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Failed to save stores "
+ << "to persistent cache.\n" << logofs_flush;
+ #endif
+
+ return -1;
+ }
+ }
+ else
+ {
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Can't save the stores with "
+ << channelCount << " remaining channels.\n"
+ << logofs_flush;
+ #endif
+
+ return -1;
+ }
+
+ return 1;
+}
+
+int ClientProxy::handleAsyncEvents()
+{
+ if (canRead() == 1)
+ {
+ #if defined(TEST) || defined(INFO)
+ *logofs << "Proxy: WARNING! Reading while writing "
+ << "with data available on the proxy link.\n"
+ << logofs_flush;
+ #endif
+
+ if (handleRead() < 0)
+ {
+ return -1;
+ }
+
+ return 1;
+ }
+
+ return 0;
+}
+
+int ClientProxy::handleLoadFromProxy()
+{
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Invalid load control message "
+ << "received in proxy.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Invalid load control message "
+ << "received in proxy.\n";
+
+ return -1;
+}
+
+int ClientProxy::handleSaveFromProxy()
+{
+ #ifdef PANIC
+ *logofs << "ClientProxy: PANIC! Invalid save control message "
+ << "received in proxy.\n" << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Invalid save control message "
+ << "received in proxy.\n";
+
+ return -1;
+}
+
+int ClientProxy::handleSaveAllStores(ostream *cachefs, md5_state_t *md5StateStream,
+ md5_state_t *md5StateClient) const
+{
+ if (clientStore_ -> saveRequestStores(cachefs, md5StateStream, md5StateClient,
+ use_checksum, discard_data) < 0)
+ {
+ return -1;
+ }
+ else if (serverStore_ -> saveReplyStores(cachefs, md5StateStream, md5StateClient,
+ discard_checksum, use_data) < 0)
+ {
+ return -1;
+ }
+ else if (serverStore_ -> saveEventStores(cachefs, md5StateStream, md5StateClient,
+ discard_checksum, use_data) < 0)
+ {
+ return -1;
+ }
+
+ return 1;
+}
+
+int ClientProxy::handleLoadAllStores(istream *cachefs, md5_state_t *md5StateStream) const
+{
+ if (clientStore_ -> loadRequestStores(cachefs, md5StateStream,
+ use_checksum, discard_data) < 0)
+ {
+ return -1;
+ }
+ else if (serverStore_ -> loadReplyStores(cachefs, md5StateStream,
+ discard_checksum, use_data) < 0)
+ {
+ return -1;
+ }
+ else if (serverStore_ -> loadEventStores(cachefs, md5StateStream,
+ discard_checksum, use_data) < 0)
+ {
+ return -1;
+ }
+
+ return 1;
+}
+