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Merge pull request #15902 from ZeusCraft10/fix/udp-discovery-cross-subnet-ipv6

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This commit is contained in:
Joshua M. Boniface
2026-04-04 01:53:59 -04:00
committed by GitHub
parent e4d6b8e1bd 72b4faa00b
commit a2dcaa9521
3 changed files with 29 additions and 3 deletions
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29
src/Jellyfin.Networking/Manager/NetworkManager.cs
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@@ -878,7 +878,20 @@ public class NetworkManager : INetworkManager, IDisposable
if (availableInterfaces.Count == 0)
{
// There isn't any others, so we'll use the loopback.
result = IsIPv4Enabled && !IsIPv6Enabled ? "127.0.0.1" : "::1";
// Prefer loopback address matching the source's address family
if (source is not null && source.AddressFamily == AddressFamily.InterNetwork && IsIPv4Enabled)
{
result = "127.0.0.1";
}
else if (source is not null && source.AddressFamily == AddressFamily.InterNetworkV6 && IsIPv6Enabled)
{
result = "::1";
}
else
{
result = IsIPv4Enabled ? "127.0.0.1" : "::1";
}
_logger.LogWarning("{Source}: Only loopback {Result} returned, using that as bind address.", source, result);
return result;
}
@@ -903,9 +916,19 @@ public class NetworkManager : INetworkManager, IDisposable
}
}
// Fallback to first available interface
// Fallback to an interface matching the source's address family, or first available
var preferredInterface = availableInterfaces
.FirstOrDefault(x => x.Address.AddressFamily == source.AddressFamily);
if (preferredInterface is not null)
{
result = NetworkUtils.FormatIPString(preferredInterface.Address);
_logger.LogDebug("{Source}: No matching subnet found, using interface with matching address family: {Result}", source, result);
return result;
}
result = NetworkUtils.FormatIPString(availableInterfaces[0].Address);
_logger.LogDebug("{Source}: No matching interfaces found, using preferred interface as bind address: {Result}", source, result);
_logger.LogDebug("{Source}: No matching interfaces found, using first available interface as bind address: {Result}", source, result);
return result;
}