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POSockets and multiple IP Addresses
 

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    <p>I have two internet cards on my machine configured with two separate ip addresses. Both ip addresses are part of the same network. Am I right in saying that when I create a socket that it is specific for one of these ip addresses? </p> <p><strong>UPDATE:</strong></p> <p>Here's my situation:</p> <p>I have a hardware device located at 192.168.0.10. It communicates via udp to (192.168.0.11, 50000) and (192.168.0.12, 50000). The hardware device does this via two ports, as follows: (192.168.0.10, 49000) and (192.168.0.10, 49001).</p> <p>I create the ports (192.168.0.11, 50000) and (192.168.0.12, 50000) via a script so that I can log and manipulate the communication, the data is then forwarded to two simulators which are capable of talking with the hardware.</p> <p>So in effect, my script is "the man in the middle" where I log and corrupt data for the purpose of testing the hardware.</p> <p>Here are the socket interfaces for my script:</p> <pre><code>IP 1 - Channel 1 External_socket = (192.168.0.10, 49000) ** Hardware External_side_socket = (192.168.0.11, 50000) ** Script Simulator_side_socket = (192.168.0.11, 50001) ** Script Simulator_socket = (192.168.0.11, 50002) ** Simulator IP2 - Channel 2 External_socket = (192.168.0.10, 49001) ** Hardware External_side_socket = (192.168.0.12, 50000) ** Script Simulator_side_socket = (192.168.0.12, 50001) ** Script Simulator_socket = (192.168.0.12, 60002) ** Simulator </code></pre> <p>And this works as expected, and the correct data is logged for each channel. </p> <p>However, it stops working if I make two simple changes: </p> <p>1) I change the second simulator's configuration file to 50002 from 60002, while keeping the ip address at 192.168.0.12.</p> <p>2) In my script I also change 60002 to 50002, for IP2.</p> <p>Suddenly the data from the second channel is arriving at the first simulator. How can this be? .net has an <strong>IPAny</strong> and I'm wondering if the simulator is using this somehow and ignoring the ip address in its config file. Do you think that might be the issue here?</p> <p>Thanks,</p> <p>Barry</p>
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