mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-08 05:54:40 +00:00
120 lines
2.5 KiB
Go
120 lines
2.5 KiB
Go
// Copyright 2011 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.
|
|
|
|
// +build aix darwin dragonfly freebsd hurd linux netbsd openbsd solaris
|
|
|
|
package net
|
|
|
|
import (
|
|
"internal/poll"
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
func dupSocket(f *os.File) (int, error) {
|
|
s, call, err := poll.DupCloseOnExec(int(f.Fd()))
|
|
if err != nil {
|
|
if call != "" {
|
|
err = os.NewSyscallError(call, err)
|
|
}
|
|
return -1, err
|
|
}
|
|
if err := syscall.SetNonblock(s, true); err != nil {
|
|
poll.CloseFunc(s)
|
|
return -1, os.NewSyscallError("setnonblock", err)
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
func newFileFD(f *os.File) (*netFD, error) {
|
|
s, err := dupSocket(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
family := syscall.AF_UNSPEC
|
|
sotype, err := syscall.GetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_TYPE)
|
|
if err != nil {
|
|
poll.CloseFunc(s)
|
|
return nil, os.NewSyscallError("getsockopt", err)
|
|
}
|
|
lsa, _ := syscall.Getsockname(s)
|
|
rsa, _ := syscall.Getpeername(s)
|
|
switch lsa.(type) {
|
|
case *syscall.SockaddrInet4:
|
|
family = syscall.AF_INET
|
|
case *syscall.SockaddrInet6:
|
|
family = syscall.AF_INET6
|
|
case *syscall.SockaddrUnix:
|
|
family = syscall.AF_UNIX
|
|
default:
|
|
poll.CloseFunc(s)
|
|
return nil, syscall.EPROTONOSUPPORT
|
|
}
|
|
fd, err := newFD(s, family, sotype, "")
|
|
if err != nil {
|
|
poll.CloseFunc(s)
|
|
return nil, err
|
|
}
|
|
laddr := fd.addrFunc()(lsa)
|
|
raddr := fd.addrFunc()(rsa)
|
|
fd.net = laddr.Network()
|
|
if err := fd.init(); err != nil {
|
|
fd.Close()
|
|
return nil, err
|
|
}
|
|
fd.setAddr(laddr, raddr)
|
|
return fd, nil
|
|
}
|
|
|
|
func fileConn(f *os.File) (Conn, error) {
|
|
fd, err := newFileFD(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
switch fd.laddr.(type) {
|
|
case *TCPAddr:
|
|
return newTCPConn(fd), nil
|
|
case *UDPAddr:
|
|
return newUDPConn(fd), nil
|
|
case *IPAddr:
|
|
return newIPConn(fd), nil
|
|
case *UnixAddr:
|
|
return newUnixConn(fd), nil
|
|
}
|
|
fd.Close()
|
|
return nil, syscall.EINVAL
|
|
}
|
|
|
|
func fileListener(f *os.File) (Listener, error) {
|
|
fd, err := newFileFD(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
switch laddr := fd.laddr.(type) {
|
|
case *TCPAddr:
|
|
return &TCPListener{fd}, nil
|
|
case *UnixAddr:
|
|
return &UnixListener{fd: fd, path: laddr.Name, unlink: false}, nil
|
|
}
|
|
fd.Close()
|
|
return nil, syscall.EINVAL
|
|
}
|
|
|
|
func filePacketConn(f *os.File) (PacketConn, error) {
|
|
fd, err := newFileFD(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
switch fd.laddr.(type) {
|
|
case *UDPAddr:
|
|
return newUDPConn(fd), nil
|
|
case *IPAddr:
|
|
return newIPConn(fd), nil
|
|
case *UnixAddr:
|
|
return newUnixConn(fd), nil
|
|
}
|
|
fd.Close()
|
|
return nil, syscall.EINVAL
|
|
}
|