difference between sock->sport and sock->num

[Marek Zawadzki <mzawadzk@cs.stevens-tech.edu>]

Hello,

What is a difference between the 2 following?
include/net/sock.h :

struct sock{
[...]

unsigned short          num;            /* Local port  */
__u16                   sport;          /* Source port */

[..]
}


Thanks,

-marek

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