// 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)
}
// 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])
}
// SetHopLimit sets the hop limit field value for future outgoing
// packets.
func (c *genericOpt) SetHopLimit(hoplim int) error {
if !c.ok() {
return syscall.EINVAL
}
s, err := netreflect.SocketOf(c.Conn)
if err != nil {
return err
}
return setInt(s, &sockOpts[ssoHopLimit], hoplim)
}
// SetTrafficClass sets the traffic class field value for future
// outgoing packets.
func (c *genericOpt) SetTrafficClass(tclass int) error {
if !c.ok() {
return syscall.EINVAL
}
s, err := netreflect.SocketOf(c.Conn)
if err != nil {
return err
}
return setInt(s, &sockOpts[ssoTrafficClass], tclass)
}
// PathMTU returns a path MTU value for the destination associated
// with the endpoint.
func (c *Conn) PathMTU() (int, error) {
if !c.genericOpt.ok() {
return 0, syscall.EINVAL
}
s, err := netreflect.SocketOf(c.genericOpt.Conn)
if err != nil {
return 0, err
}
_, mtu, err := getMTUInfo(s, &sockOpts[ssoPathMTU])
if err != nil {
return 0, err
}
return mtu, nil
}
func TestSocketOf(t *testing.T) {
for _, network := range []string{"tcp", "unix", "unixpacket"} {
switch network {
case "unix":
switch runtime.GOOS {
case "nacl", "plan9", "windows":
continue
}
case "unixpacket":
switch runtime.GOOS {
case "darwin", "nacl", "plan9", "windows":
continue
}
}
ln, err := newLocalListener(network)
if err != nil {
t.Error(err)
continue
}
defer func() {
path := ln.Addr().String()
ln.Close()
if network == "unix" || network == "unixpacket" {
os.Remove(path)
}
}()
c, err := net.Dial(ln.Addr().Network(), ln.Addr().String())
if err != nil {
t.Error(err)
continue
}
defer c.Close()
if _, err := netreflect.SocketOf(c); err != nil {
t.Error(err)
continue
}
}
}