Running TCPListener from a Windows Service
I am trying to create a Windows service which listens on a particular port for an incoming serialized object and then performs some action, however every time I start I get the following error:
System.Net.Sockets.SocketException (0x80004005): Only one usage of each socket address (protocol/network address/port) is normally permitted
Here is the code that's running:
protected override void OnStart(string args)
{
Thread t = new Thread(Server.StartServer);
t.Start();
}
The StartServer method looks like this:
public static void StartServer()
{
TcpListener server = null;
try
{
server = new TcpListener(IPAddress.Loopback, 8889);
server.Start();
}
catch(Exception e)
{
//write to a log file and close
}
for (; ; )
//Some more code that handles the serialization etc
The message seems to state that something else is already listening on that socket however when I take a look using CMD and netstat -a I see nothing on that port, and it seems to occur regardless of what I change the listening port to. The exception occurs on the line "server = new TcpListener(IPAddress.Loopback, 8889);".
Why does this error occur and how am I able to make this work properly?
*Edited to note that I have also tried this as a console app and it seems to work, it only fails when running as a Windows Service
c# windows sockets service tcplistener
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
add a comment |
I am trying to create a Windows service which listens on a particular port for an incoming serialized object and then performs some action, however every time I start I get the following error:
System.Net.Sockets.SocketException (0x80004005): Only one usage of each socket address (protocol/network address/port) is normally permitted
Here is the code that's running:
protected override void OnStart(string args)
{
Thread t = new Thread(Server.StartServer);
t.Start();
}
The StartServer method looks like this:
public static void StartServer()
{
TcpListener server = null;
try
{
server = new TcpListener(IPAddress.Loopback, 8889);
server.Start();
}
catch(Exception e)
{
//write to a log file and close
}
for (; ; )
//Some more code that handles the serialization etc
The message seems to state that something else is already listening on that socket however when I take a look using CMD and netstat -a I see nothing on that port, and it seems to occur regardless of what I change the listening port to. The exception occurs on the line "server = new TcpListener(IPAddress.Loopback, 8889);".
Why does this error occur and how am I able to make this work properly?
*Edited to note that I have also tried this as a console app and it seems to work, it only fails when running as a Windows Service
c# windows sockets service tcplistener
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
This sounds like a permissions thing; is it possibly blocked by Windows Firewall? What account is the service running as?
– Marc Gravell♦
Nov 12 '18 at 23:30
Service runs as the Windows system user, I have tried running with Windows Firewall disabled but unfortunately I got the same result
– Tom Halverson
Nov 12 '18 at 23:39
This sounds like you're trying to listen on the same port twice (or more)
– Francis Lord
Nov 12 '18 at 23:42
That's what I thought at first but I cannot see anything else listening on that port using netstat -a and the code to create the TCPListener is only called once. It also occurs when I change the port to something else.
– Tom Halverson
Nov 13 '18 at 9:09
add a comment |
I am trying to create a Windows service which listens on a particular port for an incoming serialized object and then performs some action, however every time I start I get the following error:
System.Net.Sockets.SocketException (0x80004005): Only one usage of each socket address (protocol/network address/port) is normally permitted
Here is the code that's running:
protected override void OnStart(string args)
{
Thread t = new Thread(Server.StartServer);
t.Start();
}
The StartServer method looks like this:
public static void StartServer()
{
TcpListener server = null;
try
{
server = new TcpListener(IPAddress.Loopback, 8889);
server.Start();
}
catch(Exception e)
{
//write to a log file and close
}
for (; ; )
//Some more code that handles the serialization etc
The message seems to state that something else is already listening on that socket however when I take a look using CMD and netstat -a I see nothing on that port, and it seems to occur regardless of what I change the listening port to. The exception occurs on the line "server = new TcpListener(IPAddress.Loopback, 8889);".
Why does this error occur and how am I able to make this work properly?
*Edited to note that I have also tried this as a console app and it seems to work, it only fails when running as a Windows Service
c# windows sockets service tcplistener
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
I am trying to create a Windows service which listens on a particular port for an incoming serialized object and then performs some action, however every time I start I get the following error:
System.Net.Sockets.SocketException (0x80004005): Only one usage of each socket address (protocol/network address/port) is normally permitted
Here is the code that's running:
protected override void OnStart(string args)
{
Thread t = new Thread(Server.StartServer);
t.Start();
}
The StartServer method looks like this:
public static void StartServer()
{
TcpListener server = null;
try
{
server = new TcpListener(IPAddress.Loopback, 8889);
server.Start();
}
catch(Exception e)
{
//write to a log file and close
}
for (; ; )
//Some more code that handles the serialization etc
The message seems to state that something else is already listening on that socket however when I take a look using CMD and netstat -a I see nothing on that port, and it seems to occur regardless of what I change the listening port to. The exception occurs on the line "server = new TcpListener(IPAddress.Loopback, 8889);".
Why does this error occur and how am I able to make this work properly?
*Edited to note that I have also tried this as a console app and it seems to work, it only fails when running as a Windows Service
c# windows sockets service tcplistener
c# windows sockets service tcplistener
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
asked Nov 12 '18 at 22:44
Tom HalversonTom Halverson
63
63
This sounds like a permissions thing; is it possibly blocked by Windows Firewall? What account is the service running as?
– Marc Gravell♦
Nov 12 '18 at 23:30
Service runs as the Windows system user, I have tried running with Windows Firewall disabled but unfortunately I got the same result
– Tom Halverson
Nov 12 '18 at 23:39
This sounds like you're trying to listen on the same port twice (or more)
– Francis Lord
Nov 12 '18 at 23:42
That's what I thought at first but I cannot see anything else listening on that port using netstat -a and the code to create the TCPListener is only called once. It also occurs when I change the port to something else.
– Tom Halverson
Nov 13 '18 at 9:09
add a comment |
This sounds like a permissions thing; is it possibly blocked by Windows Firewall? What account is the service running as?
– Marc Gravell♦
Nov 12 '18 at 23:30
Service runs as the Windows system user, I have tried running with Windows Firewall disabled but unfortunately I got the same result
– Tom Halverson
Nov 12 '18 at 23:39
This sounds like you're trying to listen on the same port twice (or more)
– Francis Lord
Nov 12 '18 at 23:42
That's what I thought at first but I cannot see anything else listening on that port using netstat -a and the code to create the TCPListener is only called once. It also occurs when I change the port to something else.
– Tom Halverson
Nov 13 '18 at 9:09
This sounds like a permissions thing; is it possibly blocked by Windows Firewall? What account is the service running as?
– Marc Gravell♦
Nov 12 '18 at 23:30
This sounds like a permissions thing; is it possibly blocked by Windows Firewall? What account is the service running as?
– Marc Gravell♦
Nov 12 '18 at 23:30
Service runs as the Windows system user, I have tried running with Windows Firewall disabled but unfortunately I got the same result
– Tom Halverson
Nov 12 '18 at 23:39
Service runs as the Windows system user, I have tried running with Windows Firewall disabled but unfortunately I got the same result
– Tom Halverson
Nov 12 '18 at 23:39
This sounds like you're trying to listen on the same port twice (or more)
– Francis Lord
Nov 12 '18 at 23:42
This sounds like you're trying to listen on the same port twice (or more)
– Francis Lord
Nov 12 '18 at 23:42
That's what I thought at first but I cannot see anything else listening on that port using netstat -a and the code to create the TCPListener is only called once. It also occurs when I change the port to something else.
– Tom Halverson
Nov 13 '18 at 9:09
That's what I thought at first but I cannot see anything else listening on that port using netstat -a and the code to create the TCPListener is only called once. It also occurs when I change the port to something else.
– Tom Halverson
Nov 13 '18 at 9:09
add a comment |
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This sounds like a permissions thing; is it possibly blocked by Windows Firewall? What account is the service running as?
– Marc Gravell♦
Nov 12 '18 at 23:30
Service runs as the Windows system user, I have tried running with Windows Firewall disabled but unfortunately I got the same result
– Tom Halverson
Nov 12 '18 at 23:39
This sounds like you're trying to listen on the same port twice (or more)
– Francis Lord
Nov 12 '18 at 23:42
That's what I thought at first but I cannot see anything else listening on that port using netstat -a and the code to create the TCPListener is only called once. It also occurs when I change the port to something else.
– Tom Halverson
Nov 13 '18 at 9:09