func parseSockaddr()

in auparse/sockaddr.go [38:117]
69 lines of code
16 McCabe index (conditional complexity)

func parseSockaddr(s string) (map[string]string, error) {
	if len(s) < 4 {
		return nil, invalidSockAddrError{size: len(s)}
	}

	addressFamily, err := hexToDec(s[2:4] + s[0:2]) // host-order
	if err != nil {
		return nil, err
	}

	out := map[string]string{}
	switch addressFamily {
	case 1: // AF_UNIX
		socket, err := hexToString(s[4:])
		if err != nil {
			return nil, err
		}

		out["family"] = "unix"
		out["path"] = socket
	case 2: // AF_INET
		if len(s) < 16 {
			return nil, invalidSockAddrError{
				family: "ipv4",
				size:   len(s),
			}
		}

		port, err := hexToDec(s[4:8])
		if err != nil {
			return nil, err
		}

		ip, err := hexToIP(s[8:16])
		if err != nil {
			return nil, err
		}

		out["family"] = "ipv4"
		out["addr"] = ip
		out["port"] = strconv.Itoa(int(port))
	case 10: // AF_INET6
		if len(s) < 48 {
			return nil, invalidSockAddrError{
				family: "ipv6",
				size:   len(s),
			}
		}

		port, err := hexToDec(s[4:8])
		if err != nil {
			return nil, err
		}

		flow, err := hexToDec(s[8:16])
		if err != nil {
			return nil, err
		}

		ip, err := hexToIP(s[16:48])
		if err != nil {
			return nil, err
		}

		out["family"] = "ipv6"
		out["addr"] = ip
		out["port"] = strconv.Itoa(int(port))
		if flow > 0 {
			out["flow"] = strconv.Itoa(int(flow))
		}
	case 16: // AF_NETLINK
		out["family"] = "netlink"
		out["saddr"] = s
	default:
		out["family"] = strconv.Itoa(int(addressFamily))
		out["saddr"] = s
	}

	return out, nil
}