Esempio n. 1
0
func newLookupPort(network, service string) (port int, err error) {
	acquireThread()
	defer releaseThread()
	var stype int32
	switch network {
	case "tcp4", "tcp6":
		stype = syscall.SOCK_STREAM
	case "udp4", "udp6":
		stype = syscall.SOCK_DGRAM
	}
	hints := syscall.AddrinfoW{
		Family:   syscall.AF_UNSPEC,
		Socktype: stype,
		Protocol: syscall.IPPROTO_IP,
	}
	var result *syscall.AddrinfoW
	e := syscall.GetAddrInfoW(nil, syscall.StringToUTF16Ptr(service), &hints, &result)
	if e != nil {
		return 0, os.NewSyscallError("GetAddrInfoW", e)
	}
	defer syscall.FreeAddrInfoW(result)
	if result == nil {
		return 0, os.NewSyscallError("LookupPort", syscall.EINVAL)
	}
	addr := unsafe.Pointer(result.Addr)
	switch result.Family {
	case syscall.AF_INET:
		a := (*syscall.RawSockaddrInet4)(addr)
		return int(syscall.Ntohs(a.Port)), nil
	case syscall.AF_INET6:
		a := (*syscall.RawSockaddrInet6)(addr)
		return int(syscall.Ntohs(a.Port)), nil
	}
	return 0, os.NewSyscallError("LookupPort", syscall.EINVAL)
}
Esempio n. 2
0
func (r *Resolver) lookupPort(ctx context.Context, network, service string) (int, error) {
	if r.PreferGo {
		return lookupPortMap(network, service)
	}

	// TODO(bradfitz): finish ctx plumbing. Nothing currently depends on this.
	acquireThread()
	defer releaseThread()
	var stype int32
	switch network {
	case "tcp4", "tcp6":
		stype = syscall.SOCK_STREAM
	case "udp4", "udp6":
		stype = syscall.SOCK_DGRAM
	}
	hints := syscall.AddrinfoW{
		Family:   syscall.AF_UNSPEC,
		Socktype: stype,
		Protocol: syscall.IPPROTO_IP,
	}
	var result *syscall.AddrinfoW
	e := syscall.GetAddrInfoW(nil, syscall.StringToUTF16Ptr(service), &hints, &result)
	if e != nil {
		if port, err := lookupPortMap(network, service); err == nil {
			return port, nil
		}
		return 0, &DNSError{Err: winError("getaddrinfow", e).Error(), Name: network + "/" + service}
	}
	defer syscall.FreeAddrInfoW(result)
	if result == nil {
		return 0, &DNSError{Err: syscall.EINVAL.Error(), Name: network + "/" + service}
	}
	addr := unsafe.Pointer(result.Addr)
	switch result.Family {
	case syscall.AF_INET:
		a := (*syscall.RawSockaddrInet4)(addr)
		return int(syscall.Ntohs(a.Port)), nil
	case syscall.AF_INET6:
		a := (*syscall.RawSockaddrInet6)(addr)
		return int(syscall.Ntohs(a.Port)), nil
	}
	return 0, &DNSError{Err: syscall.EINVAL.Error(), Name: network + "/" + service}
}
Esempio n. 3
0
func getservbyname(network, service string) (port int, err error) {
	switch network {
	case "tcp4", "tcp6":
		network = "tcp"
	case "udp4", "udp6":
		network = "udp"
	}
	s, err := syscall.GetServByName(service, network)
	if err != nil {
		return 0, os.NewSyscallError("GetServByName", err)
	}
	return int(syscall.Ntohs(s.Port)), nil
}
func LookupPort(network, service string) (port int, err os.Error) {
	switch network {
	case "tcp4", "tcp6":
		network = "tcp"
	case "udp4", "udp6":
		network = "udp"
	}
	serventLock.Lock()
	defer serventLock.Unlock()
	s, e := syscall.GetServByName(service, network)
	if e != 0 {
		return 0, os.NewSyscallError("GetServByName", e)
	}
	return int(syscall.Ntohs(s.Port)), nil
}