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

// CmsgLen returns the value to store in the Len field of the Cmsghdr
// structure, taking into account any necessary alignment.
func CmsgLen(datalen int) int { … }

// CmsgSpace returns the number of bytes an ancillary element with
// payload of the passed data length occupies.
func CmsgSpace(datalen int) int { … }

func (h *Cmsghdr) data(offset uintptr) unsafe.Pointer { … }

type SocketControlMessage …

// ParseSocketControlMessage parses b as an array of socket control
// messages.
func ParseSocketControlMessage(b []byte) ([]SocketControlMessage, error) { … }

// ParseOneSocketControlMessage parses a single socket control message from b, returning the message header,
// message data (a slice of b), and the remainder of b after that single message.
// When there are no remaining messages, len(remainder) == 0.
func ParseOneSocketControlMessage(b []byte) (hdr Cmsghdr, data []byte, remainder []byte, err error) { … }

func socketControlMessageHeaderAndData(b []byte) (*Cmsghdr, []byte, error) { … }

// UnixRights encodes a set of open file descriptors into a socket
// control message for sending to another process.
func UnixRights(fds ...int) []byte { … }

// ParseUnixRights decodes a socket control message that contains an
// integer array of open file descriptors from another process.
func ParseUnixRights(m *SocketControlMessage) ([]int, error) { … }