moonlight-stream/Internet-Hosting-Tool
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Implement heuristics for falling through to v4 detection even with working v6

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This commit is contained in:
Cameron Gutman 2019-07-30 21:31:28 -07:00
parent b0941fee90
commit 798be5fd0a
1 changed files with 29 additions and 8 deletions
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37
mist/mist.cpp
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@ -442,10 +442,14 @@ PortTestStatus TestHttpPort(PSOCKADDR_STORAGE addr, int port)
return PortTestOk;
}
bool TestAllPorts(PSOCKADDR_STORAGE addr, char* portMsg, int portMsgLen, bool consolePrint)
bool TestAllPorts(PSOCKADDR_STORAGE addr, char* portMsg, int portMsgLen, bool consolePrint, bool* allPortsFailed = nullptr)
{
bool ret = true;
if (allPortsFailed) {
*allPortsFailed = true;
}
for (int i = 0; i < ARRAYSIZE(k_Ports); i++) {
fprintf(LOG_OUT, "Testing %s %d...",
k_Ports[i].proto == IPPROTO_TCP ? "TCP" : "UDP",
@ -484,6 +488,9 @@ bool TestAllPorts(PSOCKADDR_STORAGE addr, char* portMsg, int portMsgLen, bool co
ret = false;
}
}
else if (allPortsFailed) {
*allPortsFailed = false;
}
}
return ret;
@ -906,12 +913,14 @@ int main(int argc, char* argv[])
fprintf(LOG_OUT, "getaddrinfo() failed: %d\n", err);
}
else {
bool allPortsFailedOnV4 = true;
// First try the relay server over IPv4. If this passes, it's considered a full success
fprintf(LOG_OUT, "Testing GameStream ports via IPv4 loopback server\n");
for (struct addrinfo* current = result; current != NULL; current = current->ai_next) {
if (current->ai_family == AF_INET) {
fprintf(CONSOLE_OUT, "Testing GameStream connectivity over the Internet using a relay server...\n");
if (TestAllPorts((PSOCKADDR_STORAGE)current->ai_addr, portMsgBuf, sizeof(portMsgBuf), true)) {
if (TestAllPorts((PSOCKADDR_STORAGE)current->ai_addr, portMsgBuf, sizeof(portMsgBuf), true, &allPortsFailedOnV4)) {
freeaddrinfo(result);
goto AllTestsPassed;
}
@ -924,12 +933,24 @@ int main(int argc, char* argv[])
if (current->ai_family == AF_INET6) {
fprintf(CONSOLE_OUT, "Testing GameStream connectivity over the Internet using an IPv6 relay server...\n");
if (TestAllPorts((PSOCKADDR_STORAGE)current->ai_addr, NULL, 0, true)) {
snprintf(msgBuf, sizeof(msgBuf), "This PC has limited connectivity for Internet hosting. It will work only for clients on certain networks.\n\n"
"If you want to try streaming with this configuration, you must pair Moonlight to your gaming PC from your home network before trying to stream over the Internet.\n\n"
"To get full connectivity, please contact your ISP and ask for a \"public IP address\" which they may offer for free upon request. For more information and workarounds, click the Help button.");
DisplayMessage(msgBuf, "https://github.com/moonlight-stream/moonlight-docs/wiki/Internet-Streaming-Errors#limited-connectivity-for-hosting-error", MpWarn);
freeaddrinfo(result);
return 0;
// We will terminate the test at the IPv6 limited connectivity warning in the following cases:
// 1) Double-NAT/CGN - indicates the connection is fundamentally limited to IPv6 for end-to-end connectivity
// 2) IPv6-only - indicates the connection is fundamentally limited to IPv6 for all connectivity
// 3) All ports failed the test with our IPv4 relay - This is one final heuristic to weed out IPv4 misconfigurations. If we have some ports open,
// it clearly indicates IPv4 support is possible, just currently misconfigured.
//
// Our last (implicit) heuristic is that we actually managed to establish an IPv6 connection. This means that there was either
// no IPv6 firewall (hopefully not) or that we were able to talk to a PCP/IGDv6 gateway to allow us through. Hopefully if we have
// a gateway that is unresponsive to UPnP/NAT-PMP, we wouldn't even be able to establish this connection so we would inherently fall
// to the checks below for IPv4 issues.
if (IsDoubleNAT(&locallyReportedWanAddr) || igdDisconnected || IsPossibleCGN(&locallyReportedWanAddr) || ss.ss_family == AF_INET6 || allPortsFailedOnV4) {
snprintf(msgBuf, sizeof(msgBuf), "This PC has limited connectivity for Internet hosting. It will work only for clients on certain networks.\n\n"
"If you want to try streaming with this configuration, you must pair Moonlight to your gaming PC from your home network before trying to stream over the Internet.\n\n"
"To get full connectivity, please contact your ISP and ask for a \"public IP address\" which they may offer for free upon request. For more information and workarounds, click the Help button.");
DisplayMessage(msgBuf, "https://github.com/moonlight-stream/moonlight-docs/wiki/Internet-Streaming-Errors#limited-connectivity-for-hosting-error", MpWarn);
freeaddrinfo(result);
return 0;
}
}
}
}