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POCan Python select what network adapter when opening a socket?
 

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  1. POCan Python select what network adapter when opening a socket?
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    <p>The target machine running the python application will have three network interfaces available to it. In general all three networks will be vastly different, however there is a possibility that two of the three could be on similar networks. </p> <p>In the example below I do not have control over the destination address on ETH 2 (as it a pre-configured system), so I forced into selecting what adapter to use programmaticly. </p> <p>I am fairly sure that this will fall on how the OS works with routing the connections. My hope is that there will be a platform independent way to solve the issue using python, because there is a possibility that this application will need to run on Windows 7 as well as a Linux machine.</p> <p><strong>Example Code</strong> </p> <pre><code>import socket s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect(('192.168.0.2', 8000)) # Which device will this connect to?? </code></pre> <p><strong>Normal Case</strong> </p> <ul> <li>ETH 0 Source: 192.168.0.1</li> <li>ETH 0 Destination: 192.168.0.2</li> <li>ETH 1 Source: 10.20.30.1</li> <li>ETH 1 Destination: 10.20.30.2</li> <li>ETH 2 Source: 60.50.40.1</li> <li>ETH 2 Destination: 60.50.40.1</li> </ul> <p><strong>Possible Trouble Case</strong> </p> <ul> <li>ETH 0 Source: 192.168.0.1</li> <li>ETH 0 Destination: 192.168.0.2</li> <li>ETH 1 Source: 10.20.30.1</li> <li>ETH 1 Destination: 10.20.30.2</li> <li>ETH 2 Source: 192.168.0.3</li> <li>ETH 2 Destination: 192.168.0.2</li> </ul> <p><strong>Additional Information</strong><br> Adapters ETH0,1,and 2 are all connected to different physical netoworks</p>
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    1. COWhat type of socket are we talking about? Are your two 192.168.0.x meant to be the same network or two different networks using the same RFC1918 address space?
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      1. POCan Python select what network adapter when opening a socket?
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    2. CO@themel: I have not done much socket programming that was far from the 'happy path', so I am afraid I don't understand your first question. Check out my edit for your 2nd question.
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