mirror of https://github.com/tailscale/tailscale/
net/tstun: set link speed to SPEED_UNKNOWN
Fixes #3933. Signed-off-by: Dmytro Shynkevych <dm.shynk@gmail.com>pull/4039/head
Dmytro Shynkevych
3 years ago
committed by
Brad Fitzpatrick
parent
5d085a6f41
commit
d9a7205be5
@ -0,0 +1,64 @@
|
|||||||
|
// Copyright (c) 2022 Tailscale Inc & 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 tstun
|
||||||
|
|
||||||
|
import (
|
||||||
|
"github.com/mdlayher/genetlink"
|
||||||
|
"github.com/mdlayher/netlink"
|
||||||
|
"golang.org/x/sys/unix"
|
||||||
|
"golang.zx2c4.com/wireguard/tun"
|
||||||
|
)
|
||||||
|
|
||||||
|
// setLinkSpeed sets the advertised link speed of the TUN interface.
|
||||||
|
func setLinkSpeed(iface tun.Device, mbps int) error {
|
||||||
|
name, err := iface.Name()
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
conn, err := genetlink.Dial(&netlink.Config{Strict: true})
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
defer conn.Close()
|
||||||
|
|
||||||
|
f, err := conn.GetFamily(unix.ETHTOOL_GENL_NAME)
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
ae := netlink.NewAttributeEncoder()
|
||||||
|
ae.Nested(unix.ETHTOOL_A_LINKMODES_HEADER, func(nae *netlink.AttributeEncoder) error {
|
||||||
|
nae.String(unix.ETHTOOL_A_HEADER_DEV_NAME, name)
|
||||||
|
return nil
|
||||||
|
})
|
||||||
|
ae.Uint32(unix.ETHTOOL_A_LINKMODES_SPEED, uint32(mbps))
|
||||||
|
|
||||||
|
b, err := ae.Encode()
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
_, err = conn.Execute(
|
||||||
|
genetlink.Message{
|
||||||
|
Header: genetlink.Header{
|
||||||
|
Command: unix.ETHTOOL_MSG_LINKMODES_SET,
|
||||||
|
Version: unix.ETHTOOL_GENL_VERSION,
|
||||||
|
},
|
||||||
|
Data: b,
|
||||||
|
},
|
||||||
|
f.ID,
|
||||||
|
netlink.Request|netlink.Acknowledge,
|
||||||
|
)
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
// setLinkAttrs sets up link attributes that can be queried by external tools.
|
||||||
|
// Its failure is non-fatal to interface bringup.
|
||||||
|
func setLinkAttrs(iface tun.Device) error {
|
||||||
|
// By default the link speed is 10Mbps, which is easily exceeded and causes monitoring tools to complain (#3933).
|
||||||
|
return setLinkSpeed(iface, unix.SPEED_UNKNOWN)
|
||||||
|
}
|
||||||
@ -0,0 +1,14 @@
|
|||||||
|
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
|
||||||
|
// Use of this source code is governed by a BSD-style
|
||||||
|
// license that can be found in the LICENSE file.
|
||||||
|
|
||||||
|
//go:build !linux
|
||||||
|
// +build !linux
|
||||||
|
|
||||||
|
package tstun
|
||||||
|
|
||||||
|
import "golang.zx2c4.com/wireguard/tun"
|
||||||
|
|
||||||
|
func setLinkAttrs(iface tun.Device) error {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue