barrier/client/CClient.cpp

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#include "CClient.h"
#include "CServerProxy.h"
#include "CClipboard.h"
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#include "CInputPacketStream.h"
#include "COutputPacketStream.h"
#include "CProtocolUtil.h"
#include "CSecondaryScreen.h"
#include "IServer.h"
#include "ProtocolTypes.h"
#include "XScreen.h"
#include "XSynergy.h"
#include "XSocket.h"
#include "CLock.h"
#include "CThread.h"
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#include "CTimerThread.h"
#include "XThread.h"
#include "CLog.h"
#include "CStopwatch.h"
#include "TMethodJob.h"
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//
// CClient
//
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CClient::CClient(const CString& clientName) :
m_name(clientName),
m_screen(NULL),
m_server(NULL),
m_camp(false),
m_session(NULL),
m_active(false),
m_rejected(true)
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{
// do nothing
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}
CClient::~CClient()
{
// do nothing
}
void
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CClient::camp(bool on)
{
CLock lock(&m_mutex);
m_camp = on;
}
void
CClient::setAddress(const CNetworkAddress& serverAddress)
{
CLock lock(&m_mutex);
m_serverAddress = serverAddress;
}
void
CClient::quit()
{
m_screen->stop();
}
bool
CClient::wasRejected() const
{
return m_rejected;
}
void
CClient::onError()
{
// close down session but don't wait too long
deleteSession(3.0);
}
void
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CClient::onInfoChanged(const CClientInfo& info)
{
log((CLOG_DEBUG "resolution changed"));
CLock lock(&m_mutex);
if (m_server != NULL) {
m_server->onInfoChanged(info);
}
}
bool
CClient::onGrabClipboard(ClipboardID id)
{
CLock lock(&m_mutex);
if (m_server == NULL) {
// m_server can be NULL if the screen calls this method
// before we've gotten around to connecting to the server.
// we simply ignore the clipboard change in that case.
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return false;
}
// grab ownership
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m_server->onGrabClipboard(id);
// we now own the clipboard and it has not been sent to the server
m_ownClipboard[id] = true;
m_timeClipboard[id] = 0;
// if we're not the active screen then send the clipboard now,
// otherwise we'll wait until we leave.
if (!m_active) {
sendClipboard(id);
}
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return true;
}
void
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CClient::onClipboardChanged(ClipboardID, const CString&)
{
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// ignore -- we'll check the clipboard when we leave
}
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bool
CClient::open()
{
// open the screen
try {
log((CLOG_INFO "opening screen"));
openSecondaryScreen();
return true;
}
catch (XScreenOpenFailure&) {
// can't open screen yet. wait a few seconds to retry.
CThread::sleep(3.0);
log((CLOG_INFO "failed to open screen"));
return false;
}
}
void
CClient::run()
{
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{
CLock lock(&m_mutex);
// check preconditions
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assert(m_screen != NULL);
assert(m_server == NULL);
// connection starts as unsuccessful
m_rejected = true;
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}
try {
log((CLOG_NOTE "starting client \"%s\"", m_name.c_str()));
// start server interactions
{
CLock lock(&m_mutex);
m_session = new CThread(new TMethodJob<CClient>(
this, &CClient::runSession));
}
// handle events
m_screen->run();
// clean up
deleteSession();
log((CLOG_NOTE "stopping client \"%s\"", m_name.c_str()));
}
catch (XBase& e) {
log((CLOG_ERR "client error: %s", e.what()));
// clean up
deleteSession();
log((CLOG_NOTE "stopping client \"%s\"", m_name.c_str()));
CLock lock(&m_mutex);
m_rejected = false;
}
catch (XThread&) {
// clean up
deleteSession();
log((CLOG_NOTE "stopping client \"%s\"", m_name.c_str()));
throw;
}
catch (...) {
log((CLOG_DEBUG "unknown client error"));
// clean up
deleteSession();
log((CLOG_NOTE "stopping client \"%s\"", m_name.c_str()));
throw;
}
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}
void
CClient::close()
{
closeSecondaryScreen();
log((CLOG_INFO "closed screen"));
}
void
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CClient::enter(SInt32 xAbs, SInt32 yAbs, UInt32, KeyModifierMask mask, bool)
{
{
CLock lock(&m_mutex);
m_active = true;
}
m_screen->enter(xAbs, yAbs, mask);
}
bool
CClient::leave()
{
m_screen->leave();
CLock lock(&m_mutex);
m_active = false;
// send clipboards that we own and that have changed
for (ClipboardID id = 0; id < kClipboardEnd; ++id) {
if (m_ownClipboard[id]) {
sendClipboard(id);
}
}
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return true;
}
void
CClient::setClipboard(ClipboardID id, const CString& data)
{
// unmarshall
CClipboard clipboard;
clipboard.unmarshall(data, 0);
// set screen's clipboard
m_screen->setClipboard(id, &clipboard);
}
void
CClient::grabClipboard(ClipboardID id)
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{
// we no longer own the clipboard
{
CLock lock(&m_mutex);
m_ownClipboard[id] = false;
}
m_screen->grabClipboard(id);
}
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void
CClient::setClipboardDirty(ClipboardID, bool)
{
assert(0 && "shouldn't be called");
}
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void
CClient::keyDown(KeyID id, KeyModifierMask mask)
{
m_screen->keyDown(id, mask);
}
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void
CClient::keyRepeat(KeyID id, KeyModifierMask mask, SInt32 count)
{
m_screen->keyRepeat(id, mask, count);
}
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void
CClient::keyUp(KeyID id, KeyModifierMask mask)
{
m_screen->keyUp(id, mask);
}
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void
CClient::mouseDown(ButtonID id)
{
m_screen->mouseDown(id);
}
void
CClient::mouseUp(ButtonID id)
{
m_screen->mouseUp(id);
}
void
CClient::mouseMove(SInt32 x, SInt32 y)
{
m_screen->mouseMove(x, y);
}
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void
CClient::mouseWheel(SInt32 delta)
{
m_screen->mouseWheel(delta);
}
void
CClient::screensaver(bool activate)
{
m_screen->screensaver(activate);
}
CString
CClient::getName() const
{
return m_name;
}
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SInt32
CClient::getJumpZoneSize() const
{
return m_screen->getJumpZoneSize();
}
void
CClient::getShape(SInt32& x, SInt32& y, SInt32& w, SInt32& h) const
{
m_screen->getShape(x, y, w, h);
}
void
CClient::getCursorPos(SInt32& x, SInt32& y) const
{
m_screen->getCursorPos(x, y);
}
void
CClient::getCursorCenter(SInt32&, SInt32&) const
{
assert(0 && "shouldn't be called");
}
// FIXME -- use factory to create screen
#if WINDOWS_LIKE
#include "CMSWindowsSecondaryScreen.h"
#elif UNIX_LIKE
#include "CXWindowsSecondaryScreen.h"
#endif
void
CClient::openSecondaryScreen()
{
assert(m_screen == NULL);
// not active
m_active = false;
// reset clipboard state
for (ClipboardID id = 0; id < kClipboardEnd; ++id) {
m_ownClipboard[id] = false;
m_timeClipboard[id] = 0;
}
// open screen
log((CLOG_DEBUG1 "creating secondary screen"));
#if WINDOWS_LIKE
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m_screen = new CMSWindowsSecondaryScreen(this);
#elif UNIX_LIKE
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m_screen = new CXWindowsSecondaryScreen(this);
#endif
log((CLOG_DEBUG1 "opening secondary screen"));
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m_screen->open();
}
void
CClient::closeSecondaryScreen()
{
assert(m_screen != NULL);
// close the secondary screen
try {
log((CLOG_DEBUG1 "closing secondary screen"));
m_screen->close();
}
catch (...) {
// ignore
}
// clean up
log((CLOG_DEBUG1 "destroying secondary screen"));
delete m_screen;
m_screen = NULL;
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}
void
CClient::sendClipboard(ClipboardID id)
{
// note -- m_mutex must be locked on entry
assert(m_screen != NULL);
assert(m_server != NULL);
// get clipboard data. set the clipboard time to the last
// clipboard time before getting the data from the screen
// as the screen may detect an unchanged clipboard and
// avoid copying the data.
CClipboard clipboard;
if (clipboard.open(m_timeClipboard[id])) {
clipboard.close();
}
m_screen->getClipboard(id, &clipboard);
// check time
if (m_timeClipboard[id] == 0 ||
clipboard.getTime() != m_timeClipboard[id]) {
// save new time
m_timeClipboard[id] = clipboard.getTime();
// marshall the data
CString data = clipboard.marshall();
// save and send data if different
if (data != m_dataClipboard[id]) {
m_dataClipboard[id] = data;
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m_server->onClipboardChanged(id, data);
}
}
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}
void
CClient::runSession(void*)
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{
try {
log((CLOG_DEBUG "starting server proxy"));
runServer();
m_screen->stop();
log((CLOG_DEBUG "stopping server proxy"));
}
catch (...) {
m_screen->stop();
log((CLOG_DEBUG "stopping server proxy"));
throw;
}
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}
void
CClient::deleteSession(double timeout)
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{
// get session thread object
CThread* thread;
{
CLock lock(&m_mutex);
thread = m_session;
m_session = NULL;
}
// shut it down
if (thread != NULL) {
thread->cancel();
thread->wait(timeout);
delete thread;
}
}
#include "CTCPSocket.h" // FIXME
void
CClient::runServer()
{
IDataSocket* socket = NULL;
CServerProxy* proxy = NULL;
try {
for (;;) {
try {
// allow connect this much time to succeed
// FIXME -- timeout in member
CTimerThread timer(m_camp ? -1.0 : 30.0);
// create socket and attempt to connect to server
log((CLOG_DEBUG1 "connecting to server"));
socket = new CTCPSocket; // FIXME -- use factory
socket->connect(m_serverAddress);
log((CLOG_INFO "connected to server"));
break;
}
catch (XSocketConnect&) {
// failed to connect. if not camping then rethrow.
if (!m_camp) {
throw;
}
// we're camping. wait a bit before retrying
CThread::sleep(5.0);
}
}
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// create proxy
log((CLOG_DEBUG1 "negotiating with server"));
proxy = handshakeServer(socket);
CLock lock(&m_mutex);
m_server = proxy;
}
catch (XThread&) {
log((CLOG_ERR "connection timed out"));
delete socket;
throw;
}
catch (XBase& e) {
log((CLOG_ERR "connection failed: %s", e.what()));
log((CLOG_DEBUG "disconnecting from server"));
delete socket;
return;
}
catch (...) {
log((CLOG_ERR "connection failed: <unknown error>"));
log((CLOG_DEBUG "disconnecting from server"));
delete socket;
return;
}
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try {
// process messages
bool rejected = true;
if (proxy != NULL) {
log((CLOG_DEBUG1 "communicating with server"));
rejected = !proxy->run();
}
// clean up
CLock lock(&m_mutex);
m_rejected = rejected;
m_server = NULL;
delete proxy;
log((CLOG_DEBUG "disconnecting from server"));
socket->close();
delete socket;
}
catch (...) {
CLock lock(&m_mutex);
m_rejected = false;
m_server = NULL;
delete proxy;
log((CLOG_DEBUG "disconnecting from server"));
socket->close();
delete socket;
throw;
}
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}
CServerProxy*
CClient::handshakeServer(IDataSocket* socket)
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{
// get the input and output streams
IInputStream* input = socket->getInputStream();
IOutputStream* output = socket->getOutputStream();
bool own = false;
// attach the encryption layer
/* FIXME -- implement ISecurityFactory
if (m_securityFactory != NULL) {
input = m_securityFactory->createInputFilter(input, own);
output = m_securityFactory->createOutputFilter(output, own);
own = true;
}
*/
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// attach the packetizing filters
input = new CInputPacketStream(input, own);
output = new COutputPacketStream(output, own);
own = true;
CServerProxy* proxy = NULL;
try {
// give handshake some time
CTimerThread timer(30.0);
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// wait for hello from server
log((CLOG_DEBUG1 "wait for hello"));
SInt16 major, minor;
CProtocolUtil::readf(input, "Synergy%2i%2i", &major, &minor);
// check versions
log((CLOG_DEBUG1 "got hello version %d.%d", major, minor));
if (major < kProtocolMajorVersion ||
(major == kProtocolMajorVersion && minor < kProtocolMinorVersion)) {
throw XIncompatibleClient(major, minor);
}
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// say hello back
log((CLOG_DEBUG1 "say hello version %d.%d", kProtocolMajorVersion, kProtocolMinorVersion));
CProtocolUtil::writef(output, "Synergy%2i%2i%s",
kProtocolMajorVersion,
kProtocolMinorVersion, &m_name);
// create server proxy
proxy = new CServerProxy(this, input, output);
// negotiate
// FIXME
return proxy;
}
catch (XIncompatibleClient& e) {
log((CLOG_ERR "server has incompatible version %d.%d", e.getMajor(), e.getMinor()));
}
catch (XBase& e) {
log((CLOG_WARN "error communicating with server: %s", e.what()));
}
catch (...) {
// probably timed out
if (proxy != NULL) {
delete proxy;
}
else if (own) {
delete input;
delete output;
}
throw;
}
// failed
if (proxy != NULL) {
delete proxy;
}
else if (own) {
delete input;
delete output;
}
return NULL;
}