Fields
ifrn: extern union { name: [IFNAMESIZE]u8 },
ifru: extern union { addr: sockaddr, dstaddr: sockaddr, broadaddr: sockaddr, netmask: sockaddr, hwaddr: sockaddr, flags: i16, ivalue: i32, mtu: i32, map: ifmap, slave: [IFNAMESIZE - 1:0]u8, newname: [IFNAMESIZE - 1:0]u8, data: ?[*]u8, },