Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	var value ICMPv6Filter
	vallen := _Socklen(SizeofICMPv6Filter)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptUcred(fd, level, opt int) (*Ucred, error) {
	var value Ucred
	vallen := _Socklen(SizeofUcred)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {

func (cred Credentials) IsValid() bool {
	// Verify credentials if its enabled or not set.
	if cred.Status == AccountOff {
		return false
	}
	return IsAccessKeyValid(cred.AccessKey) && IsSecretKeyValid(cred.SecretKey) && !cred.IsExpired()
}

// Equal - returns whether two credentials are equal or not.
func (cred Credentials) Equal(ccred Credentials) bool {
	if !ccred.IsValid() {
		return false
	}

	s3Err = authenticateRequest(ctx, r, action)
	reqInfo := logger.GetReqInfo(ctx)
	if reqInfo == nil {
		return cred, owner, ErrAccessDenied
	}

	cred = reqInfo.Cred
	owner = reqInfo.Owner
	if s3Err != ErrNone {
		return cred, owner, s3Err
	}

	return cred, owner, authorizeRequest(ctx, r, action)
}

	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	r := &http.Request{Header: formValues}
	cred, _, s3Err := checkKeyValid(r, credHeader.accessKey)
	if s3Err != ErrNone {
		return cred, s3Err
	}

	// Get signing key.
	signingKey := getSigningKey(cred.SecretKey, credHeader.scope.date, credHeader.scope.region, serviceS3)

	// Get signature.