}
	return n, i, true
}

// xtoi2 converts the next two hex digits of s into a byte.
// If s is longer than 2 bytes then the third byte must be e.
// If the first two bytes of s are not hex digits or the third byte
// does not match e, false is returned.
func xtoi2(s string, e byte) (byte, bool) {
	if len(s) > 2 && s[2] != e {
		return 0, false
	}
	n, ei, ok := xtoi(s[:2])
	return byte(n), ok && ei == 2
}

		}

		if len(line) > 0 && len(line)%2 == 0 {
			ifc.HardwareAddr = make([]byte, len(line)/2)
			var ok bool
			for i := range ifc.HardwareAddr {
				j := (i + 1) * 2
				ifc.HardwareAddr[i], ok = xtoi2(line[i*2:j], 0)
				if !ok {
					ifc.HardwareAddr = ifc.HardwareAddr[:i]
					break
				}
			}
		}

		ifc.Flags = FlagUp | FlagRunning | FlagBroadcast | FlagMulticast
	} else {