Anyone know what function or file in linux holds the algorithm that finds a random port to use for the bind() system call? I’m hunting all over and cannot find the method that contains this algorithm in the Linux source.
Thanks!
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Anyone know what function or file in linux holds the algorithm that finds a random port to use for the bind() system call? I’m hunting all over and cannot find the method that contains this algorithm in the Linux source.
Thanks!
It’s a long and complicated piece of code, which I’m not keen to try to grok. 🙂
Have a look at the
inet_csk_get_portfunction (innet/ipv4/inet_connection_sock.c) for TCP, andudp_lib_get_port(innet/ipv4/udp.c) for UDP. It’s valid, at least, for 2.6.31, though it may vary for different versions.