forked from TrueCloudLab/lego
63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
|
// Copyright 2017 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 !go1.9
|
||
|
|
|
||
|
|
package socket
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"net"
|
||
|
|
"os"
|
||
|
|
"reflect"
|
||
|
|
"runtime"
|
||
|
|
)
|
||
|
|
|
||
|
|
// A Conn represents a raw connection.
|
||
|
|
type Conn struct {
|
||
|
|
c net.Conn
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewConn returns a new raw connection.
|
||
|
|
func NewConn(c net.Conn) (*Conn, error) {
|
||
|
|
return &Conn{c: c}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (o *Option) get(c *Conn, b []byte) (int, error) {
|
||
|
|
s, err := socketOf(c.c)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
n, err := getsockopt(s, o.Level, o.Name, b)
|
||
|
|
return n, os.NewSyscallError("getsockopt", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (o *Option) set(c *Conn, b []byte) error {
|
||
|
|
s, err := socketOf(c.c)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
return os.NewSyscallError("setsockopt", setsockopt(s, o.Level, o.Name, b))
|
||
|
|
}
|
||
|
|
|
||
|
|
func socketOf(c net.Conn) (uintptr, error) {
|
||
|
|
switch c.(type) {
|
||
|
|
case *net.TCPConn, *net.UDPConn, *net.IPConn:
|
||
|
|
v := reflect.ValueOf(c)
|
||
|
|
switch e := v.Elem(); e.Kind() {
|
||
|
|
case reflect.Struct:
|
||
|
|
fd := e.FieldByName("conn").FieldByName("fd")
|
||
|
|
switch e := fd.Elem(); e.Kind() {
|
||
|
|
case reflect.Struct:
|
||
|
|
sysfd := e.FieldByName("sysfd")
|
||
|
|
if runtime.GOOS == "windows" {
|
||
|
|
return uintptr(sysfd.Uint()), nil
|
||
|
|
}
|
||
|
|
return uintptr(sysfd.Int()), nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0, errors.New("invalid type")
|
||
|
|
}
|