Function Socket

pkg/sentry/syscalls/linux/sys_socket.go:178–207

Socket implements the linux syscall socket(2).

(t *kernel.Task, sysno uintptr, args arch.SyscallArguments)

// Socket implements the linux syscall socket(2).
func Socket(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {
	domain := int(args[0].Int())
	stype := args[1].Int()
	protocol := int(args[2].Int())

	// Check and initialize the flags.
	if stype & ^(0xf|linux.SOCK_NONBLOCK|linux.SOCK_CLOEXEC) != 0 {
		return 0, nil, linuxerr.EINVAL
	}

	// Create the new socket.
	s, e := socket.New(t, domain, linux.SockType(stype&0xf), protocol)
	if e != nil {
		return 0, nil, e.ToError()
	}
	defer s.DecRef(t)

	if err := s.SetStatusFlags(t, t.Credentials(), uint32(stype&linux.SOCK_NONBLOCK)); err != nil {
		return 0, nil, err
	}

	fd, err := t.NewFDFrom(0, s, kernel.FDFlags{
		CloseOnExec: stype&linux.SOCK_CLOEXEC != 0,
	})
	if err != nil {
		return 0, nil, err
	}

	return uintptr(fd), nil, nil
}

// SocketPair implements the linux syscall socketpair(2).
func SocketPair(t *kernel.Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *kernel.SyscallControl, error) {