Method SetSockOpt

pkg/sentry/socket/netstack/netstack.go:686–735

SetSockOpt implements the linux syscall setsockopt(2) for sockets backed by tcpip.Endpoint.

(t *kernel.Task, level int, name int, optVal []byte)

// SetSockOpt implements the linux syscall setsockopt(2) for sockets backed by
// tcpip.Endpoint.
func (s *sock) SetSockOpt(t *kernel.Task, level int, name int, optVal []byte) *syserr.Error {
	// TODO(b/78348848): Unlike other socket options, SO_TIMESTAMP is
	// implemented specifically for netstack.Socket rather than
	// commonEndpoint. commonEndpoint should be extended to support socket
	// options where the implementation is not shared, as unix sockets need
	// their own support for SO_TIMESTAMP.
	if level == linux.SOL_SOCKET && name == linux.SO_TIMESTAMP {
		if len(optVal) < sizeOfInt32 {
			return syserr.ErrInvalidArgument
		}
		s.readMu.Lock()
		defer s.readMu.Unlock()
		s.sockOptTimestamp = hostarch.ByteOrder.Uint32(optVal) != 0
		return nil
	}
	if level == linux.SOL_TCP && name == linux.TCP_INQ {
		if len(optVal) < sizeOfInt32 {
			return syserr.ErrInvalidArgument
		}
		s.readMu.Lock()
		defer s.readMu.Unlock()
		s.sockOptInq = hostarch.ByteOrder.Uint32(optVal) != 0
		return nil
	}

	switch level {
	case linux.SOL_SOCKET:
		return SetSockOptSocket(t, s, s.Endpoint, name, optVal)

	case linux.SOL_TCP:
		return s.setSockOptTCP(t, s.Endpoint, name, optVal)

	case linux.SOL_ICMPV6:
		return s.setSockOptICMPv6(t, s.Endpoint, name, optVal)

	case linux.SOL_IPV6:
		return s.setSockOptIPv6(t, s.Endpoint, name, optVal)

	case linux.SOL_IP:
		return s.setSockOptIP(t, s.Endpoint, name, optVal)

	case linux.SOL_PACKET:
		return s.setSockOptPacket(t, s.Endpoint, name, optVal)

	case linux.SOL_UDP, linux.SOL_RAW:
		// Not supported.
	}

	return nil
}

// minSockAddrLen returns the minimum length in bytes of a socket address for
// the socket's family.