void ServerPool::SelectDefaultListen(bool force)
{
if (!force)
{
QReadLocker rlock(&naLock);
if (!naList_4.isEmpty() || !naList_6.isEmpty())
// lists are already populated, do nothing
return;
}
QWriteLocker wlock(&naLock);
naList_4.clear();
naList_6.clear();
// populate stored IPv4 and IPv6 addresses
QHostAddress config_v4(gCoreContext->resolveSettingAddress(
"BackendServerIP",
QString(),
gCoreContext->ResolveIPv4, true));
bool v4IsSet = config_v4.isNull() ? true : false;
#if !defined(QT_NO_IPV6)
QHostAddress config_v6(gCoreContext->resolveSettingAddress(
"BackendServerIP6",
QString(),
gCoreContext->ResolveIPv6, true));
bool v6IsSet = config_v6.isNull() ? true : false;
#endif
bool allowLinkLocal = gCoreContext->GetNumSetting("AllowLinkLocal", true) > 0;
// loop through all available interfaces
QList<QNetworkInterface> IFs = QNetworkInterface::allInterfaces();
QList<QNetworkInterface>::const_iterator qni;
for (qni = IFs.begin(); qni != IFs.end(); ++qni)
{
if ((qni->flags() & QNetworkInterface::IsRunning) == 0)
continue;
QList<QNetworkAddressEntry> IPs = qni->addressEntries();
QList<QNetworkAddressEntry>::iterator qnai;
for (qnai = IPs.begin(); qnai != IPs.end(); ++qnai)
{
QHostAddress ip = qnai->ip();
#if !defined(QT_NO_IPV6)
if (ip.protocol() == QAbstractSocket::IPv4Protocol)
{
#endif
if (naList_4.contains(*qnai))
// already defined, skip
continue;
else if (!config_v4.isNull() && (ip == config_v4))
{
// IPv4 address is defined, add it
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding BackendServerIP to address list."));
naList_4.append(*qnai);
v4IsSet = true;
}
else if (ip == QHostAddress::LocalHost)
{
// always listen on LocalHost
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding IPv4 loopback to address list."));
naList_4.append(*qnai);
if (!v4IsSet && (config_v4 == ip))
v4IsSet = true;
}
else if (ip.isInSubnet(kLinkLocal) && allowLinkLocal)
{
// optionally listen on linklocal
// the next clause will enable it anyway if no IP address
// has been set
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding link-local '%1' to address list.")
.arg(PRETTYIP_(ip)));
naList_4.append(*qnai);
}
else if (config_v4.isNull())
{
// IPv4 address is not defined, populate one
// restrict autoconfiguration to RFC1918 private networks
static QPair<QHostAddress, int>
privNet1 = QHostAddress::parseSubnet("10.0.0.0/8"),
privNet2 = QHostAddress::parseSubnet("172.16.0.0/12"),
privNet3 = QHostAddress::parseSubnet("192.168.0.0/16");
if (ip.isInSubnet(privNet1) || ip.isInSubnet(privNet2) ||
ip.isInSubnet(privNet3))
{
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding '%1' to address list.")
.arg(PRETTYIP_(ip)));
naList_4.append(*qnai);
}
else if (ip.isInSubnet(kLinkLocal))
{
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding link-local '%1' to address list.")
.arg(PRETTYIP_(ip)));
naList_4.append(*qnai);
}
else
LOG(VB_GENERAL, LOG_DEBUG, QString("Skipping "
"non-private address during IPv4 autoselection: %1")
.arg(PRETTYIP_(ip)));
}
else
LOG(VB_GENERAL, LOG_DEBUG, QString("Skipping address: %1")
.arg(PRETTYIP_(ip)));
#if !defined(QT_NO_IPV6)
}
else
{
if (ip.isInSubnet(kLinkLocal6))
{
// set scope id for link local address
ip.setScopeId(qni->name());
qnai->setIp(ip);
}
if (naList_6.contains(*qnai))
// already defined, skip
continue;
else if ((!config_v6.isNull()) && (ip == config_v6))
{
// IPv6 address is defined, add it
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding BackendServerIP6 to address list."));
naList_6.append(*qnai);
v6IsSet = true;
}
else if (ip == QHostAddress::LocalHostIPv6)
{
// always listen on LocalHost
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding IPv6 loopback to address list."));
naList_6.append(*qnai);
if (!v6IsSet && (config_v6 == ip))
v6IsSet = true;
}
else if (ip.isInSubnet(kLinkLocal6) && allowLinkLocal)
{
// optionally listen on linklocal
// the next clause will enable it anyway if no IP address
// has been set
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding link-local '%1' to address list.")
.arg(ip.toString()));
naList_6.append(*qnai);
}
else if (config_v6.isNull())
{
if (ip.isInSubnet(kLinkLocal6))
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding link-local '%1' to address list.")
.arg(PRETTYIP_(ip)));
else
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding '%1' to address list.")
.arg(PRETTYIP_(ip)));
naList_6.append(*qnai);
}
else
LOG(VB_GENERAL, LOG_DEBUG, QString("Skipping address: %1")
.arg(PRETTYIP_(ip)));
}
#endif
}
}
if (!v4IsSet && (config_v4 != QHostAddress::LocalHost)
&& !naList_4.isEmpty())
{
LOG(VB_GENERAL, LOG_CRIT, LOC + QString("Host is configured to listen "
"on %1, but address is not used on any local network "
"interfaces.").arg(config_v4.toString()));
}
#if !defined(QT_NO_IPV6)
if (!v6IsSet && (config_v6 != QHostAddress::LocalHostIPv6)
&& !naList_6.isEmpty())
{
LOG(VB_GENERAL, LOG_CRIT, LOC + QString("Host is configured to listen "
"on %1, but address is not used on any local network "
"interfaces.").arg(PRETTYIP_(config_v6)));
}
#endif
// NOTE: there is no warning for the case where both defined addresses
// are localhost, and neither are found. however this would also
// mean there is no configured network at all, and should be
// sufficiently rare a case as to not worry about it.
}
void ServerPool::SelectDefaultListen(bool force)
{
if (!force)
{
QReadLocker rlock(&naLock);
if (!naList_4.isEmpty() || !naList_6.isEmpty())
// lists are already populated, do nothing
return;
}
QWriteLocker wlock(&naLock);
naList_4.clear();
naList_6.clear();
// populate stored IPv4 and IPv6 addresses
// if address is not defined, QHostAddress will be invalid and Null
QHostAddress config_v4(gCoreContext->GetSetting("BackendServerIP"));
bool v4IsSet = config_v4.isNull() ? true : false;
#if !defined(QT_NO_IPV6)
QHostAddress config_v6(gCoreContext->GetSetting("BackendServerIP6"));
bool v6IsSet = config_v6.isNull() ? true : false;
#endif
// loop through all available interfaces
QList<QNetworkInterface> IFs = QNetworkInterface::allInterfaces();
QList<QNetworkInterface>::const_iterator qni;
for (qni = IFs.begin(); qni != IFs.end(); ++qni)
{
QList<QNetworkAddressEntry> IPs = qni->addressEntries();
QList<QNetworkAddressEntry>::const_iterator qnai;
for (qnai = IPs.begin(); qnai != IPs.end(); ++qnai)
{
QHostAddress ip = qnai->ip();
if (naList_4.contains(*qnai))
// already defined, skip
continue;
else if (!config_v4.isNull() && (ip == config_v4))
{
// IPv4 address is defined, add it
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding BackendServerIP to address list."));
naList_4.append(*qnai);
v4IsSet = true;
}
else if (ip == QHostAddress::LocalHost)
{
// always listen on LocalHost
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding IPv4 loopback to address list."));
naList_4.append(*qnai);
if (!v4IsSet && (config_v4 == ip))
v4IsSet = true;
}
else if (config_v4.isNull() &&
(ip.protocol() == QAbstractSocket::IPv4Protocol))
{
// IPv4 address is not defined, populate one
// restrict autoconfiguration to RFC1918 private networks
if (ip.isInSubnet(QHostAddress::parseSubnet("10.0.0.0/8")) ||
ip.isInSubnet(QHostAddress::parseSubnet("172.16.0.0/12")) ||
ip.isInSubnet(QHostAddress::parseSubnet("192.168.0.0/16")))
{
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding '%1' to address list.")
.arg(ip.toString()));
naList_4.append(*qnai);
}
else
LOG(VB_GENERAL, LOG_DEBUG, QString("Skipping non-private "
"address during IPv4 autoselection: %1")
.arg(ip.toString()));
}
#if !defined(QT_NO_IPV6)
else if (naList_6.contains(*qnai))
// already defined, skip
continue;
else if (!config_v6.isNull() && (ip == config_v6))
{
// IPv6 address is defined, add it
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding BackendServerIP6 to address list."));
naList_6.append(*qnai);
v6IsSet = true;
}
else if (ip == QHostAddress::LocalHostIPv6)
{
// always listen on LocalHost
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding IPv6 loopback to address list."));
naList_6.append(*qnai);
if (!v6IsSet && (config_v6 == ip))
v6IsSet = true;
}
else if (config_v6.isNull() &&
(ip.protocol() == QAbstractSocket::IPv6Protocol))
{
// IPv6 address is not defined, populate one
// put in additional block filtering here?
if (!ip.isInSubnet(QHostAddress::parseSubnet("fe80::/10")))
{
LOG(VB_GENERAL, LOG_DEBUG,
QString("Adding '%1' to address list.")
.arg(PRETTYIP_(ip)));
naList_6.append(*qnai);
}
else
LOG(VB_GENERAL, LOG_DEBUG, QString("Skipping link-local "
"address during IPv6 autoselection: %1")
.arg(PRETTYIP_(ip)));
}
#endif
else
LOG(VB_GENERAL, LOG_DEBUG, QString("Skipping address: %1")
.arg(PRETTYIP_(ip)));
}
}
if (!v4IsSet && (config_v4 != QHostAddress::LocalHost)
&& !naList_4.isEmpty())
{
LOG(VB_GENERAL, LOG_CRIT, LOC + QString("Host is configured to listen "
"on %1, but address is not used on any local network "
"interfaces.").arg(config_v4.toString()));
}
#if !defined(QT_NO_IPV6)
if (!v6IsSet && (config_v6 != QHostAddress::LocalHostIPv6)
&& !naList_6.isEmpty())
{
LOG(VB_GENERAL, LOG_CRIT, LOC + QString("Host is configured to listen "
"on %1, but address is not used on any local network "
"interfaces.").arg(PRETTYIP_(config_v6)));
}
#endif
// NOTE: there is no warning for the case where both defined addresses
// are localhost, and neither are found. however this would also
// mean there is no configured network at all, and should be
// sufficiently rare a case as to not worry about it.
}
