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package soundbox
import (
"fmt"
"net"
)
// toLinkLocal converts a MAC address to the corresponding IPv6 link-local
// address.
func toLinkLocal(ha net.HardwareAddr) (net.IP, error) {
switch len(ha) {
case 6:
ip := net.IP{0xfe, 0x80, 0, 0, 0, 0, 0, 0,
ha[0] ^ 0b10, ha[1], ha[2], 0xff, 0xfe, ha[3], ha[4], ha[5]}
return ip, nil
default:
return nil, fmt.Errorf("Only IEEE 802 MAC-48 addresses supported")
}
}
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