64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
|
// Copyright 2012 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 darwin dragonfly freebsd linux netbsd openbsd solaris windows
|
||
|
|
|
||
|
|
package ipv4
|
||
|
|
|
||
|
|
import (
|
||
|
|
"syscall"
|
||
|
|
|
||
|
|
"golang.org/x/net/internal/netreflect"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TOS returns the type-of-service field value for outgoing packets.
|
||
|
|
func (c *genericOpt) TOS() (int, error) {
|
||
|
|
if !c.ok() {
|
||
|
|
return 0, syscall.EINVAL
|
||
|
|
}
|
||
|
|
s, err := netreflect.SocketOf(c.Conn)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
return getInt(s, &sockOpts[ssoTOS])
|
||
|
|
}
|
||
|
|
|
||
|
|
// SetTOS sets the type-of-service field value for future outgoing
|
||
|
|
// packets.
|
||
|
|
func (c *genericOpt) SetTOS(tos int) error {
|
||
|
|
if !c.ok() {
|
||
|
|
return syscall.EINVAL
|
||
|
|
}
|
||
|
|
s, err := netreflect.SocketOf(c.Conn)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
return setInt(s, &sockOpts[ssoTOS], tos)
|
||
|
|
}
|
||
|
|
|
||
|
|
// TTL returns the time-to-live field value for outgoing packets.
|
||
|
|
func (c *genericOpt) TTL() (int, error) {
|
||
|
|
if !c.ok() {
|
||
|
|
return 0, syscall.EINVAL
|
||
|
|
}
|
||
|
|
s, err := netreflect.SocketOf(c.Conn)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
return getInt(s, &sockOpts[ssoTTL])
|
||
|
|
}
|
||
|
|
|
||
|
|
// SetTTL sets the time-to-live field value for future outgoing
|
||
|
|
// packets.
|
||
|
|
func (c *genericOpt) SetTTL(ttl int) error {
|
||
|
|
if !c.ok() {
|
||
|
|
return syscall.EINVAL
|
||
|
|
}
|
||
|
|
s, err := netreflect.SocketOf(c.Conn)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
return setInt(s, &sockOpts[ssoTTL], ttl)
|
||
|
|
}
|