I want to make a program to receive a packet on one network interface do some processing and forward it to a different interface. What can be the most efficient way to do it on Linux? I want to forward the packet with minimum delay
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I want to make a program to receive a packet on one network interface do some processing and forward it to a different interface. What can be the most efficient way to do it on Linux? I want to forward the packet with minimum delay
Use
libnetfilter_queue.Then write your own program and link with
libnetfilter_queue. After some really simple operations you will be able to userecvto receive packets andnfq_set_verdictto decide what to do with the packet.