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Read incoming packets
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Join Date: Jan 2008
Posts: 54
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Junior Poster in Training
Hello,
I need help in my project, where I want to catch, read and forward some packets given to another application. Example: some packets is incoming for application MyApp on port 888. The another application is running on background and listening for communication with MyApp. If the server sends packet I need to catch it before it comes to MyApp and if data inside will include some special code, like "....server_echo" I need to destroy it. But if there isn't any special code, I need to forward it to MyApp.
It looks like a firewall application.
Thank you
I need help in my project, where I want to catch, read and forward some packets given to another application. Example: some packets is incoming for application MyApp on port 888. The another application is running on background and listening for communication with MyApp. If the server sends packet I need to catch it before it comes to MyApp and if data inside will include some special code, like "....server_echo" I need to destroy it. But if there isn't any special code, I need to forward it to MyApp.
It looks like a firewall application.
Thank you
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Join Date: Dec 2005
Posts: 6,605
Reputation: 
Solved Threads: 854
Set your app to listen to 127.0.0.1:888
Your filter then connects to 127.0.0.1:888 and itself listens on port 888 of the machine itself.
Your filter now sees all the traffic on that port, and can forward/modify/drop as necessary.
Your filter then connects to 127.0.0.1:888 and itself listens on port 888 of the machine itself.
Your filter now sees all the traffic on that port, and can forward/modify/drop as necessary.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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