static bool RemoteSendReceiveStringList(const QString &host, QStringList &strlist)
{
bool ok = false;
if (gCoreContext->IsMasterBackend())
{
// since the master backend cannot connect back around to
// itself, and the libraries do not have access to the list
// of connected slave backends to query an existing connection
// start up a new temporary connection directly to the slave
// backend to query the file list
QString ann = QString("ANN Playback %1 0")
.arg(gCoreContext->GetHostName());
QString addr = gCoreContext->GetBackendServerIP(host);
int port = gCoreContext->GetBackendServerPort(host);
bool mismatch = false;
MythSocket *sock = gCoreContext->ConnectCommandSocket(
addr, port, ann, &mismatch);
if (sock)
{
ok = sock->SendReceiveStringList(strlist);
sock->DecrRef();
}
else
strlist.clear();
}
else
ok = gCoreContext->SendReceiveStringList(strlist);
return ok;
}
/**
* \brief Can we talk to port on host?
*/
bool telnet(const QString &host, int port)
{
MythSocket *s = new MythSocket();
bool connected = s->connect(host, port);
s->DownRef();
return connected;
}
MythSocket *MythCoreContext::ConnectEventSocket(const QString &hostname,
int port)
{
MythSocket *eventSock = new MythSocket();
while (eventSock->state() != MythSocket::Idle)
{
usleep(5000);
}
// Assume that since we _just_ connected the command socket,
// this one won't need multiple retries to work...
if (!eventSock->connect(hostname, port))
{
LOG(VB_GENERAL, LOG_ERR, LOC + "Failed to connect event "
"socket to master backend");
eventSock->DecrRef();
return NULL;
}
eventSock->Lock();
QString str = QString("ANN Monitor %1 %2")
.arg(d->m_localHostname).arg(true);
QStringList strlist(str);
eventSock->writeStringList(strlist);
bool ok = true;
if (!eventSock->readStringList(strlist) || strlist.empty() ||
(strlist[0] == "ERROR"))
{
if (!strlist.empty())
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"Problem connecting event socket to master backend");
}
else
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"Timeout connecting event socket to master backend");
}
ok = false;
}
eventSock->Unlock();
if (ok)
{
eventSock->setCallbacks(this);
}
else
{
eventSock->DecrRef();
eventSock = NULL;
}
return eventSock;
}
bool RemoteGetFileList(QString host, QString path, QStringList* list,
QString sgroup, bool fileNamesOnly)
{
// Make sure the list is empty when we get started
list->clear();
if (sgroup.isEmpty())
sgroup = "Videos";
*list << "QUERY_SG_GETFILELIST";
*list << host;
*list << StorageGroup::GetGroupToUse(host, sgroup);
*list << path;
*list << QString::number(fileNamesOnly);
bool ok = false;
if (gCoreContext->IsMasterBackend())
{
// since the master backend cannot connect back around to
// itself, and the libraries do not have access to the list
// of connected slave backends to query an existing connection
// start up a new temporary connection directly to the slave
// backend to query the file list
QString ann = QString("ANN Playback %1 0")
.arg(gCoreContext->GetHostName());
QString addr = gCoreContext->GetBackendServerIP(host);
int port = gCoreContext->GetBackendServerPort(host);
bool mismatch = false;
MythSocket *sock = gCoreContext->ConnectCommandSocket(
addr, port, ann, &mismatch);
if (sock)
{
ok = sock->SendReceiveStringList(*list);
sock->DecrRef();
}
else
list->clear();
}
else
ok = gCoreContext->SendReceiveStringList(*list);
// Should the SLAVE UNREACH test be here ?
return ok;
}
MythSocket *RemoteFile::openSocket(bool control)
{
QUrl qurl(path);
QString dir;
QString host = qurl.host();
int port = qurl.port();
dir = qurl.path();
if (qurl.hasQuery())
#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
dir += "?" + QUrl::fromPercentEncoding(
qurl.query(QUrl::FullyEncoded).toLocal8Bit());
#else
dir += "?" + QUrl::fromPercentEncoding(qurl.encodedQuery());
#endif
if (qurl.hasFragment())
dir += "#" + qurl.fragment();
QString sgroup = qurl.userName();
MythSocket *lsock = new MythSocket();
QString stype = (control) ? "control socket" : "file data socket";
QString loc = QString("RemoteFile::openSocket(%1): ").arg(stype);
if (port <= 0)
{
port = GetMythDB()->GetSettingOnHost("BackendServerPort", host).toInt();
// if we still have no port use the default
if (port <= 0)
port = 6543;
}
if (!lsock->ConnectToHost(host, port))
{
LOG(VB_GENERAL, LOG_ERR, loc +
QString("Could not connect to server %1:%2") .arg(host).arg(port));
lsock->DecrRef();
return NULL;
}
QString hostname = GetMythDB()->GetHostName();
QStringList strlist;
#ifndef IGNORE_PROTO_VER_MISMATCH
if (!gCoreContext->CheckProtoVersion(lsock))
{
LOG(VB_GENERAL, LOG_ERR, loc +
QString("Failed validation to server %1:%2").arg(host).arg(port));
lsock->DecrRef();
return NULL;
}
#endif
if (control)
{
strlist.append(QString("ANN Playback %1 %2").arg(hostname).arg(false));
if (!lsock->SendReceiveStringList(strlist))
{
LOG(VB_GENERAL, LOG_ERR, loc +
QString("Could not read string list from server %1:%2")
.arg(host).arg(port));
lsock->DecrRef();
return NULL;
}
}
else
{
strlist.push_back(QString("ANN FileTransfer %1 %2 %3 %4")
.arg(hostname).arg(writemode)
.arg(usereadahead).arg(timeout_ms));
strlist << QString("%1").arg(dir);
strlist << sgroup;
QStringList::const_iterator it = possibleauxfiles.begin();
for (; it != possibleauxfiles.end(); ++it)
strlist << *it;
if (!lsock->SendReceiveStringList(strlist))
{
LOG(VB_GENERAL, LOG_ERR, loc +
QString("Did not get proper response from %1:%2")
.arg(host).arg(port));
strlist.clear();
strlist.push_back("ERROR");
strlist.push_back("invalid response");
}
if (strlist.size() >= 3)
{
it = strlist.begin();
++it;
recordernum = (*it).toInt();
++it;
filesize = (*(it)).toLongLong();
++it;
for (; it != strlist.end(); ++it)
auxfiles << *it;
}
else if (0 < strlist.size() && strlist.size() < 3 &&
strlist[0] != "ERROR")
{
LOG(VB_GENERAL, LOG_ERR, loc +
QString("Did not get proper response from %1:%2")
.arg(host).arg(port));
strlist.clear();
strlist.push_back("ERROR");
strlist.push_back("invalid response");
}
}
if (strlist.empty() || strlist[0] == "ERROR")
{
lsock->DecrRef();
lsock = NULL;
if (strlist.empty())
{
LOG(VB_GENERAL, LOG_ERR, loc + "Failed to open socket, timeout");
}
else
{
LOG(VB_GENERAL, LOG_ERR, loc + "Failed to open socket" +
((strlist.size() >= 2) ?
QString(", error was %1").arg(strlist[1]) :
QString(", remote error")));
}
}
return lsock;
}
int connect_to_master(void)
{
MythSocket *tempMonitorConnection = new MythSocket();
if (tempMonitorConnection->connect(
gCoreContext->GetSetting("MasterServerIP", "127.0.0.1"),
gCoreContext->GetNumSetting("MasterServerPort", 6543)))
{
if (!gCoreContext->CheckProtoVersion(tempMonitorConnection))
{
VERBOSE(VB_IMPORTANT, "Master backend is incompatible with "
"this backend.\nCannot become a slave.");
return GENERIC_EXIT_CONNECT_ERROR;
}
QStringList tempMonitorDone("DONE");
QStringList tempMonitorAnnounce("ANN Monitor tzcheck 0");
tempMonitorConnection->writeStringList(tempMonitorAnnounce);
tempMonitorConnection->readStringList(tempMonitorAnnounce);
if (tempMonitorAnnounce.empty() ||
tempMonitorAnnounce[0] == "ERROR")
{
tempMonitorConnection->DownRef();
tempMonitorConnection = NULL;
if (tempMonitorAnnounce.empty())
{
VERBOSE(VB_IMPORTANT, LOC_ERR +
"Failed to open event socket, timeout");
}
else
{
VERBOSE(VB_IMPORTANT, LOC_ERR +
"Failed to open event socket" +
((tempMonitorAnnounce.size() >= 2) ?
QString(", error was %1").arg(tempMonitorAnnounce[1]) :
QString(", remote error")));
}
}
QStringList tzCheck("QUERY_TIME_ZONE");
if (tempMonitorConnection)
{
tempMonitorConnection->writeStringList(tzCheck);
tempMonitorConnection->readStringList(tzCheck);
}
if (tzCheck.size() && !checkTimeZone(tzCheck))
{
// Check for different time zones, different offsets, different
// times
VERBOSE(VB_IMPORTANT, "The time and/or time zone settings on "
"this system do not match those in use on the master "
"backend. Please ensure all frontend and backend "
"systems are configured to use the same time zone and "
"have the current time properly set.");
VERBOSE(VB_IMPORTANT,
"Unable to run with invalid time settings. Exiting.");
tempMonitorConnection->writeStringList(tempMonitorDone);
tempMonitorConnection->DownRef();
return GENERIC_EXIT_INVALID_TIMEZONE;
}
else
{
VERBOSE(VB_IMPORTANT,
QString("Backend is running in %1 time zone.")
.arg(getTimeZoneID()));
}
if (tempMonitorConnection)
tempMonitorConnection->writeStringList(tempMonitorDone);
}
if (tempMonitorConnection)
tempMonitorConnection->DownRef();
return GENERIC_EXIT_OK;
}
int connect_to_master(void)
{
MythSocket *tempMonitorConnection = new MythSocket();
if (tempMonitorConnection->ConnectToHost(
gCoreContext->GetMasterServerIP(),
gCoreContext->GetMasterServerPort()))
{
if (!gCoreContext->CheckProtoVersion(tempMonitorConnection))
{
LOG(VB_GENERAL, LOG_ERR, "Master backend is incompatible with "
"this backend.\nCannot become a slave.");
tempMonitorConnection->DecrRef();
return GENERIC_EXIT_CONNECT_ERROR;
}
QStringList tempMonitorDone("DONE");
QStringList tempMonitorAnnounce(QString("ANN Monitor %1 0")
.arg(gCoreContext->GetHostName()));
tempMonitorConnection->SendReceiveStringList(tempMonitorAnnounce);
if (tempMonitorAnnounce.empty() ||
tempMonitorAnnounce[0] == "ERROR")
{
tempMonitorConnection->DecrRef();
tempMonitorConnection = NULL;
if (tempMonitorAnnounce.empty())
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"Failed to open event socket, timeout");
}
else
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"Failed to open event socket" +
((tempMonitorAnnounce.size() >= 2) ?
QString(", error was %1").arg(tempMonitorAnnounce[1]) :
QString(", remote error")));
}
}
QStringList timeCheck;
if (tempMonitorConnection)
{
timeCheck.push_back("QUERY_TIME_ZONE");
tempMonitorConnection->SendReceiveStringList(timeCheck);
tempMonitorConnection->WriteStringList(tempMonitorDone);
}
if (timeCheck.size() < 3)
{
if (tempMonitorConnection)
tempMonitorConnection->DecrRef();
return GENERIC_EXIT_SOCKET_ERROR;
}
QDateTime our_time = MythDate::current();
QDateTime master_time = MythDate::fromString(timeCheck[2]);
int timediff = abs(our_time.secsTo(master_time));
if (timediff > 300)
{
LOG(VB_GENERAL, LOG_ERR,
QString("Current time on the master backend differs by "
"%1 seconds from time on this system. Exiting.")
.arg(timediff));
if (tempMonitorConnection)
tempMonitorConnection->DecrRef();
return GENERIC_EXIT_INVALID_TIME;
}
if (timediff > 20)
{
LOG(VB_GENERAL, LOG_WARNING,
QString("Time difference between the master "
"backend and this system is %1 seconds.")
.arg(timediff));
}
}
if (tempMonitorConnection)
tempMonitorConnection->DecrRef();
return GENERIC_EXIT_OK;
}
MythSocket *RemoteFile::openSocket(bool control)
{
QUrl qurl(path);
QString dir;
QString host = qurl.host();
int port = qurl.port();
dir = qurl.path();
if (qurl.hasQuery())
dir += "?" + QUrl::fromPercentEncoding(qurl.encodedQuery());
if (qurl.hasFragment())
dir += "#" + qurl.fragment();
QString sgroup = qurl.userName();
MythSocket *lsock = new MythSocket();
QString stype = (control) ? "control socket" : "file data socket";
QString loc_err = QString("RemoteFile::openSocket(%1), Error: ").arg(stype);
if (port <= 0)
{
port = GetMythDB()->GetSettingOnHost("BackendServerPort", host).toInt();
// if we still have no port use the default
if (port <= 0)
port = 6543;
}
if (!lsock->connect(host, port))
{
LOG(VB_GENERAL, LOG_ERR,
QString("Could not connect to server %1:%2")
.arg(host).arg(port));
lsock->DownRef();
return NULL;
}
QString hostname = GetMythDB()->GetHostName();
QStringList strlist;
if (control)
{
strlist.append(QString("ANN Playback %1 %2").arg(hostname).arg(false));
lsock->writeStringList(strlist);
if (!lsock->readStringList(strlist, true))
{
LOG(VB_GENERAL, LOG_ERR,
QString("\n\t\t\tCould not read string list from server "
"%1:%2").arg(host).arg(port));
lsock->DownRef();
return NULL;
}
}
else
{
strlist.push_back(QString("ANN FileTransfer %1 %2 %3 %4")
.arg(hostname).arg(writemode)
.arg(usereadahead).arg(timeout_ms));
strlist << QString("%1").arg(dir);
strlist << sgroup;
QStringList::const_iterator it = possibleauxfiles.begin();
for (; it != possibleauxfiles.end(); ++it)
strlist << *it;
if (!lsock->writeStringList(strlist) ||
!lsock->readStringList(strlist, true))
{
LOG(VB_GENERAL, LOG_ERR,
QString("Did not get proper response from %1:%2")
.arg(host).arg(port));
strlist.clear();
strlist.push_back("ERROR");
strlist.push_back("invalid response");
}
if (strlist.size() >= 3)
{
it = strlist.begin(); ++it;
recordernum = (*it).toInt(); ++it;
filesize = (*(it)).toLongLong(); ++it;
for (; it != strlist.end(); ++it)
auxfiles << *it;
}
else if (0 < strlist.size() && strlist.size() < 3 &&
strlist[0] != "ERROR")
{
LOG(VB_GENERAL, LOG_ERR,
QString("Did not get proper response from %1:%2")
.arg(host).arg(port));
strlist.clear();
strlist.push_back("ERROR");
strlist.push_back("invalid response");
}
}
if (strlist.empty() || strlist[0] == "ERROR")
{
lsock->DownRef();
lsock = NULL;
if (strlist.empty())
{
LOG(VB_GENERAL, LOG_ERR, "Failed to open socket, timeout");
}
else
{
LOG(VB_GENERAL, LOG_ERR, "Failed to open socket" +
((strlist.size() >= 2) ?
QString(", error was %1").arg(strlist[1]) :
QString(", remote error")));
}
}
return lsock;
}
MythSocket *MythCoreContext::ConnectCommandSocket(
const QString &hostname, int port, const QString &announce,
bool *p_proto_mismatch, bool gui, int maxConnTry, int setup_timeout)
{
MythSocket *serverSock = NULL;
{
QMutexLocker locker(&d->m_WOLInProgressLock);
d->WaitForWOL();
}
QString WOLcmd = GetSetting("WOLbackendCommand", "");
if (maxConnTry < 1)
maxConnTry = max(GetNumSetting("BackendConnectRetry", 1), 1);
int WOLsleepTime = 0, WOLmaxConnTry = 0;
if (!WOLcmd.isEmpty())
{
WOLsleepTime = GetNumSetting("WOLbackendReconnectWaitTime", 0);
WOLmaxConnTry = max(GetNumSetting("WOLbackendConnectRetry", 1), 1);
maxConnTry = max(maxConnTry, WOLmaxConnTry);
}
bool we_attempted_wol = false;
if (setup_timeout <= 0)
setup_timeout = MythSocket::kShortTimeout;
bool proto_mismatch = false;
for (int cnt = 1; cnt <= maxConnTry; cnt++)
{
LOG(VB_GENERAL, LOG_INFO, LOC +
QString("Connecting to backend server: %1:%2 (try %3 of %4)")
.arg(hostname).arg(port).arg(cnt).arg(maxConnTry));
serverSock = new MythSocket();
int sleepms = 0;
if (serverSock->connect(hostname, port))
{
if (SetupCommandSocket(
serverSock, announce, setup_timeout, proto_mismatch))
{
break;
}
if (proto_mismatch)
{
if (p_proto_mismatch)
*p_proto_mismatch = true;
serverSock->DecrRef();
serverSock = NULL;
break;
}
setup_timeout = (int)(setup_timeout * 1.5f);
}
else if (!WOLcmd.isEmpty() && (cnt < maxConnTry))
{
if (!we_attempted_wol)
{
QMutexLocker locker(&d->m_WOLInProgressLock);
if (d->m_WOLInProgress)
{
d->WaitForWOL();
continue;
}
d->m_WOLInProgress = we_attempted_wol = true;
}
myth_system(WOLcmd, kMSDontDisableDrawing | kMSDontBlockInputDevs |
kMSProcessEvents);
sleepms = WOLsleepTime * 1000;
}
serverSock->DecrRef();
serverSock = NULL;
if (!serverSock && (cnt == 1))
{
QCoreApplication::postEvent(
d->m_GUIcontext, new MythEvent("CONNECTION_FAILURE"));
}
if (sleepms)
usleep(sleepms * 1000);
}
if (we_attempted_wol)
{
QMutexLocker locker(&d->m_WOLInProgressLock);
d->m_WOLInProgress = false;
d->m_WOLInProgressWaitCondition.wakeAll();
}
if (!serverSock && !proto_mismatch)
{
LOG(VB_GENERAL, LOG_ERR,
"Connection to master server timed out.\n\t\t\t"
"Either the server is down or the master server settings"
"\n\t\t\t"
"in mythtv-settings does not contain the proper IP address\n");
}
else
{
QCoreApplication::postEvent(
d->m_GUIcontext, new MythEvent("CONNECTION_RESTABLISHED"));
}
return serverSock;
}
