forked from mystiq/dex
45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
// Copyright 2013 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.
|
|
|
|
package ipv6
|
|
|
|
import (
|
|
"net"
|
|
"reflect"
|
|
"syscall"
|
|
)
|
|
|
|
func (c *genericOpt) sysfd() (syscall.Handle, error) {
|
|
switch p := c.Conn.(type) {
|
|
case *net.TCPConn, *net.UDPConn, *net.IPConn:
|
|
return sysfd(p)
|
|
}
|
|
return syscall.InvalidHandle, errInvalidConnType
|
|
}
|
|
|
|
func (c *dgramOpt) sysfd() (syscall.Handle, error) {
|
|
switch p := c.PacketConn.(type) {
|
|
case *net.UDPConn, *net.IPConn:
|
|
return sysfd(p.(net.Conn))
|
|
}
|
|
return syscall.InvalidHandle, errInvalidConnType
|
|
}
|
|
|
|
func (c *payloadHandler) sysfd() (syscall.Handle, error) {
|
|
return sysfd(c.PacketConn.(net.Conn))
|
|
}
|
|
|
|
func sysfd(c net.Conn) (syscall.Handle, error) {
|
|
cv := reflect.ValueOf(c)
|
|
switch ce := cv.Elem(); ce.Kind() {
|
|
case reflect.Struct:
|
|
netfd := ce.FieldByName("conn").FieldByName("fd")
|
|
switch fe := netfd.Elem(); fe.Kind() {
|
|
case reflect.Struct:
|
|
fd := fe.FieldByName("sysfd")
|
|
return syscall.Handle(fd.Uint()), nil
|
|
}
|
|
}
|
|
return syscall.InvalidHandle, errInvalidConnType
|
|
}
|