Getting IP address of connected socket

  • Thread starter Thread starter Zytan
  • Start date Start date
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Zytan

Once a socket is connected, perhaps to a hostname that contains
multiple IP addresses, how can I determine to which IP address the
connection is made? The only thing I can get from my Socket is an
EndPoint, which doesn't help, since it's abstract, and I need an
IPEndPoint to get the data I want (I believe). It is difficult to
find information on this, since most results show how to create a
socket given an IP address or hostname, not the reverse (which most
people couldn't care less about).

Zytan
 
Once a socket is connected, perhaps to a hostname that contains
multiple IP addresses, how can I determine to which IP address the
connection is made? The only thing I can get from my Socket is an
EndPoint, which doesn't help, since it's abstract, and I need an
IPEndPoint to get the data I want (I believe). It is difficult to
find information on this, since most results show how to create a
socket given an IP address or hostname, not the reverse (which most
people couldn't care less about).
Click to expand...

IPEndPoint ip = endPoint as IPEndPoint;
if (ip != null)
{
Console.WriteLine ("Endpoint address is {0}", ip.Address);
}
else
{
Console.WriteLine ("Endpoint is not an IPEndPoint");
}

Jon
 
Once a socket is connected, perhaps to a hostname that contains
multiple IP addresses, how can I determine to which IP address the
connection is made? The only thing I can get from my Socket is an
EndPoint, which doesn't help, since it's abstract, and I need an
IPEndPoint to get the data I want (I believe). It is difficult to
find information on this, since most results show how to create a
socket given an IP address or hostname, not the reverse (which most
people couldn't care less about).

Zytan
Click to expand...


Let me see if I understand the question: You have a software server
runing that accepts a socket connection. You want to know if the
connection came in on your ethernet card A or your ethernet card B,
correct?

Are you using tcpListener? Or are you using raw Sockets to manage the
connection? What is the class/tool you are using, because that will
determine how we can best answer you.
 
IPEndPoint ip = endPoint as IPEndPoint;
if (ip != null)
{
Console.WriteLine ("Endpoint address is {0}", ip.Address);}
else
{
Console.WriteLine ("Endpoint is not an IPEndPoint");
}
Click to expand...

Ok, so that's how you change from the abstract to the base. And "as"
returns null if it fails. I didn't even know you could do this for
this case.

Thanks, Jon.

Zytan
 
Let me see if I understand the question: You have a software server
runing that accepts a socket connection. You want to know if the
connection came in on your ethernet card A or your ethernet card B,
correct?
Click to expand...

No, I have a hostname. I create an endpoint with that hostname and
port. I connect directly to that. (I could get a list of IPs that
the hostname gives, and then use one of them, as well, but I don't, I
just use Socket.Connect direct to the hostname + port). Now, I want
to know to which IP did I connect to? Using that IP, I want to get
the hostname of that IP. This is not necessarily the same hostname
that I used to connect, since that original hostname could
'forward' (I don't know the proper terminology, sorry) to a bunch of
other hostnames / IPs. And this is what I want to know.
Are you using tcpListener? Or are you using raw Sockets to manage the
connection? What is the class/tool you are using, because that will
determine how we can best answer you.
Click to expand...

I am using:

Socket socket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
socket.Connect(hostName, port);

Is this what is called raw sockets?

Thanks for your reply,

Zytan

(Btw, Jon already answered my main question in another post.)
 
Hi,

Zytan said:
Ok, so that's how you change from the abstract to the base. And "as"
returns null if it fails. I didn't even know you could do this for
this case.
Click to expand...

You changed it from the abstract base class to the derived class.
 
Ok, so that's how you change from the abstract to the base. And "as"
You changed it from the abstract base class to the derived class.
Click to expand...

Yeah, that's what I meant, sorry. Yes, the abstract is the bass
class.

Zytan
 
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