| // Copyright 2023 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build wasip1 |
| |
| package net |
| |
| import ( |
| "os" |
| "syscall" |
| _ "unsafe" // for go:linkname |
| ) |
| |
| func fileListener(f *os.File) (Listener, error) { |
| fd, err := newFileFD(f) |
| if err != nil { |
| return nil, err |
| } |
| return &TCPListener{fd: fd}, nil |
| } |
| |
| func fileConn(f *os.File) (Conn, error) { |
| fd, err := newFileFD(f) |
| if err != nil { |
| return nil, err |
| } |
| return &TCPConn{conn{fd: fd}}, nil |
| } |
| |
| func filePacketConn(f *os.File) (PacketConn, error) { return nil, syscall.ENOPROTOOPT } |
| |
| func newFileFD(f *os.File) (fd *netFD, err error) { |
| pfd := f.PollFD().Copy() |
| defer func() { |
| if err != nil { |
| pfd.Close() |
| } |
| }() |
| filetype, err := fd_fdstat_get_type(pfd.Sysfd) |
| if err != nil { |
| return nil, err |
| } |
| if filetype != syscall.FILETYPE_SOCKET_STREAM { |
| return nil, syscall.ENOTSOCK |
| } |
| fd, err = newPollFD(pfd) |
| if err != nil { |
| return nil, err |
| } |
| if err := fd.init(); err != nil { |
| return nil, err |
| } |
| return fd, nil |
| } |
| |
| // This helper is implemented in the syscall package. It means we don't have |
| // to redefine the fd_fdstat_get host import or the fdstat struct it |
| // populates. |
| // |
| //go:linkname fd_fdstat_get_type syscall.fd_fdstat_get_type |
| func fd_fdstat_get_type(fd int) (uint8, error) |