func ipToSockaddr()

in internal/ip/ip.go [165:191]

• 27 lines of code
• 8 McCabe index (conditional complexity)

func ipToSockaddr(family int, ip net.IP, port int) (syscall.Sockaddr, error) {
	switch family {
	case syscall.AF_INET:
		if len(ip) == 0 {
			ip = net.IPv4zero
		}
		ip4 := ip.To4()
		if ip4 == nil {
			return nil, &net.AddrError{Err: "non-IPv4 address", Addr: ip.String()}
		}
		sa := &syscall.SockaddrInet4{Port: port}
		copy(sa.Addr[:], ip4)
		return sa, nil
	case syscall.AF_INET6:
		if len(ip) == 0 || ip.Equal(net.IPv4zero) {
			ip = net.IPv6zero
		}
		ip6 := ip.To16()
		if ip6 == nil {
			return nil, &net.AddrError{Err: "non-IPv6 address", Addr: ip.String()}
		}
		sa := &syscall.SockaddrInet6{Port: port}
		copy(sa.Addr[:], ip6)
		return sa, nil
	}
	return nil, &net.AddrError{Err: "unhandled AF family", Addr: ip.String()}
}