Get interface MAC address in sys_accept4() syscall

[Guram Z. Savinov]

Hi all,

in net/socket.c is syscall sys_accept4(). In it syscall I need to get 
MAC address of interface, from connection is come.
For example it is two interfaces eth0 and eth1. I want to know, from 
what interface connection is come to sys_accept4().
Please help me, how I can do it.

Thank's for attention for my question.
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