kubernetes/vendor/golang.org/x/sys/unix/sockcmsg_linux.go

// UnixCredentials encodes credentials into a socket control message
// for sending to another process. This can be used for
// authentication.
func UnixCredentials(ucred *Ucred) []byte { … }

// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the
// SO_PASSCRED option must be enabled on the socket.
func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) { … }

// PktInfo4 encodes Inet4Pktinfo into a socket control message of type IP_PKTINFO.
func PktInfo4(info *Inet4Pktinfo) []byte { … }

// PktInfo6 encodes Inet6Pktinfo into a socket control message of type IPV6_PKTINFO.
func PktInfo6(info *Inet6Pktinfo) []byte { … }

// ParseOrigDstAddr decodes a socket control message containing the original
// destination address. To receive such a message the IP_RECVORIGDSTADDR or
// IPV6_RECVORIGDSTADDR option must be enabled on the socket.
func ParseOrigDstAddr(m *SocketControlMessage) (Sockaddr, error) { … }