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Add a check for blocked LAN access

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This commit is contained in:
Cameron Gutman
2020-02-21 17:33:06 -08:00
parent c7813a7a0b
commit 3e1ffce16f
1 changed files with 55 additions and 9 deletions
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64
mist/mist.cpp
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@@ -322,6 +322,44 @@ bool IsHibernationEnabled()
return powerPolicy.DozeS4Timeout != 0 || (powerPolicy.IdleTimeout != 0 && powerPolicy.Idle.Action == PowerActionHibernate);
}
bool IsLocalNetworkAccessBlocked()
{
MIB_IPFORWARDROW route;
DWORD error;
SOCKADDR_IN sin;
SOCKET s;
error = GetBestRoute(0, 0, &route);
if (error != NO_ERROR) {
fprintf(LOG_OUT, "GetBestRoute() failed: %d\n", error);
return false;
}
s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s == INVALID_SOCKET) {
fprintf(LOG_OUT, "socket() failed: %d\n", error);
return false;
}
RtlZeroMemory(&sin, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.S_un.S_addr = route.dwForwardNextHop;
sin.sin_port = htons(80);
if (connect(s, (PSOCKADDR)&sin, sizeof(sin)) == 0) {
error = NO_ERROR;
fprintf(LOG_OUT, "connect(%s, %d) successful\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
}
else {
error = WSAGetLastError();
fprintf(LOG_OUT, "connect(%s, %d) failed: %d\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), error);
}
closesocket(s);
return error == WSAEACCES;
}
bool IsZeroTierInstalled()
{
DWORD error;
@@ -1058,16 +1096,31 @@ int main(int argc, char* argv[])
if (IsSleepEnabled()) {
DisplayMessage("This computer has sleep mode enabled. Sleep mode may prevent this PC from being available for streaming.\n\n"
"Please ensure sleep is disabled in Power Options so this PC is always ready for streaming.",
"Please ensure sleep is disabled in Power Options so this PC is always ready for streaming. Click the Help button for more information.",
"https://github.com/moonlight-stream/moonlight-docs/wiki/Internet-Streaming-Errors#sleep-mode-enabled-warning", MpWarn, false);
}
if (IsHibernationEnabled()) {
DisplayMessage("This computer has hibernation enabled. Hibernation may prevent this PC from being available for streaming.\n\n"
"Please ensure hibernation is disabled in Power Options so this PC is always ready for streaming.",
"Please ensure hibernation is disabled in Power Options so this PC is always ready for streaming. Click the Help button for more information.",
"https://github.com/moonlight-stream/moonlight-docs/wiki/Internet-Streaming-Errors#hibernation-enabled-warning", MpWarn, false);
}
fprintf(CONSOLE_OUT, "Checking network connections...\n");
if (IsLocalNetworkAccessBlocked()) {
DisplayMessage("Local network access appears to be blocked by another application installed on this PC.\n\n"
"If you have firewall or VPN software installed, make sure it is configured to allow applications to access the local network. Click the Help button for guidance on fixing this issue.",
"https://github.com/moonlight-stream/moonlight-docs/wiki/Internet-Streaming-Errors#local-network-access-blocked-error");
return -1;
}
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);
}
fprintf(CONSOLE_OUT, "Checking for anti-virus and firewall software...\n");
char wmicBuf[8192];
@@ -1083,13 +1136,6 @@ int main(int argc, char* argv[])
}
}
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;