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Detect multiple connections to the same network

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This commit is contained in:
Cameron Gutman
2019-09-28 15:24:53 -07:00
parent 20e7374480
commit 2805464e86
1 changed files with 60 additions and 1 deletions
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61
mist/mist.cpp
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@@ -590,7 +590,7 @@ bool FindZeroTierInterfaceAddress(PSOCKADDR_STORAGE addr)
&addresses,
&length);
if (error != ERROR_SUCCESS) {
fprintf(LOG_OUT, "GetAdaptersAddresses() failed: %d\n", WSAGetLastError());
fprintf(LOG_OUT, "GetAdaptersAddresses() failed: %d\n", error);
return false;
}
@@ -616,6 +616,57 @@ bool FindZeroTierInterfaceAddress(PSOCKADDR_STORAGE addr)
return false;
}
bool FindDuplicateDefaultInterfaces(void)
{
union {
IP_ADAPTER_ADDRESSES addresses;
char buffer[8192];
};
ULONG error;
ULONG length;
MIB_IPFORWARDROW defaultRoute;
PIP_ADAPTER_ADDRESSES currentAdapter;
DWORD matchingInterfaces = 0;
error = GetBestRoute(0, 0, &defaultRoute);
if (error != NO_ERROR) {
fprintf(LOG_OUT, "GetBestRoute() failed: %d\n", error);
return false;
}
// Get all IPv4 interfaces
length = sizeof(buffer);
error = GetAdaptersAddresses(AF_INET,
GAA_FLAG_SKIP_UNICAST |
GAA_FLAG_SKIP_ANYCAST |
GAA_FLAG_SKIP_MULTICAST |
GAA_FLAG_SKIP_DNS_SERVER |
GAA_FLAG_INCLUDE_GATEWAYS |
GAA_FLAG_SKIP_FRIENDLY_NAME,
NULL,
&addresses,
&length);
if (error != ERROR_SUCCESS) {
fprintf(LOG_OUT, "GetAdaptersAddresses() failed: %d\n", error);
return false;
}
currentAdapter = &addresses;
while (currentAdapter != NULL) {
if (currentAdapter->OperStatus == IfOperStatusUp &&
currentAdapter->FirstGatewayAddress != NULL &&
currentAdapter->FirstGatewayAddress->Address.iSockaddrLength == sizeof(SOCKADDR_IN)) {
if (((PSOCKADDR_IN)currentAdapter->FirstGatewayAddress->Address.lpSockaddr)->sin_addr.S_un.S_addr == defaultRoute.dwForwardNextHop) {
matchingInterfaces++;
}
}
currentAdapter = currentAdapter->Next;
}
return matchingInterfaces > 1;
}
enum UPnPPortStatus {
NOT_FOUND,
OK,
@@ -885,6 +936,14 @@ int main(int argc, char* argv[])
return -1;
}
fprintf(CONSOLE_OUT, "Checking network connections...\n");
if (FindDuplicateDefaultInterfaces()) {
DisplayMessage("This computer appears to have more than one connection to the same network (like both WiFi and Ethernet, for example).\n\n"
"Please disconnect the extra connection(s) to ensure hosting works reliably over the Internet. If you are connected via WiFi and Ethernet, try disabling your WiFi connection.",
"https://github.com/moonlight-stream/moonlight-docs/wiki/Internet-Streaming-Errors#multiple-connections-error", MpWarn, false);
}
union {
SOCKADDR_STORAGE ss;
SOCKADDR_IN sin;