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When running the webserver, "System.Net.Sockets.SocketException (97): Address family not supported by protocol" message is displayed.
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Yiming Chen
0
Reputation points
Hi experts:
I use asp.net core 8 write a web server app in visual studio 2022, when running on some embedded Linux system, will report the error "System.Net.Sockets.SocketException (97) : Address family not supported by protocol.". The whole stack as follows:
[05:43:59 INF] User profile is available. Using '/home/root/.aspnet/DataProtection-Keys' as key repository; keys will not be encrypted at rest. [05:44:00 ERR] Hosting failed to start System.Net.Sockets.SocketException (97): Address family not supported by protocol at System.Net.Sockets.Socket..ctor(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType) at System.Net.Sockets.UdpClient.CreateClientSocket() at System.Net.Sockets.UdpClient..ctor(AddressFamily family) at Makaretu.Dns.MulticastService..ctor(Func2 filter) at Makaretu.Dns.ServiceDiscovery..ctor() at TCAWeb.MdnsBackgroundService.ExecuteAsync(CancellationToken stoppingToken) in C:\Users\xxxWeb\MdnsBackgroundService.cs:line 19 at Microsoft.Extensions.Hosting.BackgroundService.StartAsync(CancellationToken cancellationToken) at Microsoft.Extensions.Hosting.Internal.Host.<StartAsync>b__15_1(IHostedService service, CancellationToken token) at Microsoft.Extensions.Hosting.Internal.Host.ForeachService[T](IEnumerable1 services, CancellationToken token, Boolean concurrent, Boolean abortOnFirstException, List1 exceptions, Func3 operation) Unhandled exception. System.Net.Sockets.SocketException (97): Address family not supported by protocol at System.Net.Sockets.Socket..ctor(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType) at System.Net.Sockets.UdpClient.CreateClientSocket() at System.Net.Sockets.UdpClient..ctor(AddressFamily family) at Makaretu.Dns.MulticastService..ctor(Func2 filter) at Makaretu.Dns.ServiceDiscovery..ctor() at TCAWeb.MdnsBackgroundService.ExecuteAsync(CancellationToken stoppingToken) in C:\Users\xxxWeb\MdnsBackgroundService.cs:line 19 at Microsoft.Extensions.Hosting.BackgroundService.StartAsync(CancellationToken cancellationToken) at Microsoft.Extensions.Hosting.Internal.Host.<StartAsync>b__15_1(IHostedService service, CancellationToken token) at Microsoft.Extensions.Hosting.Internal.Host.ForeachService[T](IEnumerable1 services, CancellationToken token, Boolean concurrent, Boolean abortOnFirstException, List1 exceptions, Func3 operation) at Microsoft.Extensions.Hosting.Internal.Host.<StartAsync>g__LogAndRethrow|15_3(<>c__DisplayClass15_0&) at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken) at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token) at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token) at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host) at Microsoft.AspNetCore.Builder.WebApplication.Run(String url) at TCAWeb.Program.Main(String[] args) in C:\Users\xxxWeb\Program.cs:line 189
*The embedded linux device supports ipv4, and the webserver app also uses ipv4, and this webserver app has been successfully run on other embedded linux devices. The port used is also not occupied.
I have tried many ways to solve this problem, do you know the reason?
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Zhi Lv - MSFT 32,091 Reputation points Microsoft Vendor2024-06-10T02:06:15.8266667+00:00 Hi @Yiming Chen
From your description, only part of the embedded Linux device has this issue, right?
For these devices, you can refer to the following steps to troubleshooting:
- Verify IPv4 configuration on the embedded device. use the
ip aorifconfigto check there is an IPv4 address assigned to the network interface - Explicitly configure Kestrel to use IPv4 in your application.
Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); webBuilder.UseKestrel(options => { options.Listen(IPAddress.Any, 5000); // Ensure IPv4 is used }); }); - Check kernel modules and ensure they are loaded. Use
lsmodandmodprobe <module_name>check loaded modules and load necessary modules.
Best regards,
Dillion - Verify IPv4 configuration on the embedded device. use the
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