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Implement detection of local IPv6 addresses

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This commit is contained in:
Cameron Gutman
2022-11-02 20:35:41 -05:00
parent 371906445e
commit 411998d4e3
4 changed files with 47 additions and 23 deletions
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33
app/backend/nvcomputer.cpp
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@@ -293,7 +293,7 @@ bool NvComputer::wake() const
return success;
}
bool NvComputer::isReachableOverVpn() const
NvComputer::ReachabilityType NvComputer::getActiveAddressReachability() const
{
NvAddress copyOfActiveAddress;
@@ -301,7 +301,7 @@ bool NvComputer::isReachableOverVpn() const
QReadLocker readLocker(&lock);
if (activeAddress.isNull()) {
return false;
return ReachabilityType::RI_UNKNOWN;
}
// Grab a copy of the active address to avoid having to hold
@@ -332,48 +332,55 @@ bool NvComputer::isReachableOverVpn() const
if (nic.type() == QNetworkInterface::Virtual ||
nic.type() == QNetworkInterface::Ppp) {
// Treat PPP and virtual interfaces as likely VPNs
return true;
return ReachabilityType::RI_VPN;
}
if (nic.maximumTransmissionUnit() != 0 && nic.maximumTransmissionUnit() < 1500) {
// Treat MTUs under 1500 as likely VPNs
return true;
return ReachabilityType::RI_VPN;
}
#endif
if (nic.flags() & QNetworkInterface::IsPointToPoint) {
// Treat point-to-point links as likely VPNs.
// This check detects OpenVPN on Unix-like OSes.
return true;
return ReachabilityType::RI_VPN;
}
if (nic.hardwareAddress().startsWith("00:FF", Qt::CaseInsensitive)) {
// OpenVPN TAP interfaces have a MAC address starting with 00:FF on Windows
return true;
return ReachabilityType::RI_VPN;
}
if (nic.humanReadableName().startsWith("ZeroTier")) {
// ZeroTier interfaces always start with "ZeroTier"
return true;
return ReachabilityType::RI_VPN;
}
if (nic.humanReadableName().contains("VPN")) {
// This one is just a final heuristic if all else fails
return true;
// This one is just a final VPN heuristic if all else fails
return ReachabilityType::RI_VPN;
}
// Didn't meet any of our VPN heuristics
return false;
// Didn't meet any of our VPN heuristics. Let's see if it's on-link.
Q_ASSERT(addr.prefixLength() >= 0);
if (addr.prefixLength() >= 0 && s.localAddress().isInSubnet(addr.ip(), addr.prefixLength())) {
return ReachabilityType::RI_LAN;
}
// Default to unknown if nothing else matched
return ReachabilityType::RI_UNKNOWN;
}
}
}
qWarning() << "No match found for address:" << s.localAddress();
return false;
return ReachabilityType::RI_UNKNOWN;
}
else {
// If we fail to connect, just pretend that it's not a VPN
return false;
qWarning() << "Unable to check for reachability within 3 seconds";
return ReachabilityType::RI_UNKNOWN;
}
}