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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
// Package ethtool aims to provide a library giving a simple access to the
// Linux SIOCETHTOOL ioctl operations. It can be used to retrieve informations
// from a network device like statistics, driver related informations or
// even the peer of a VETH interface.
package ethtool
import (
"math"
"reflect"
"syscall"
"unsafe"
)
type EthtoolCmd struct { /* ethtool.c: struct ethtool_cmd */
Cmd uint32
Supported uint32
Advertising uint32
Speed uint16
Duplex uint8
Port uint8
Phy_address uint8
Transceiver uint8
Autoneg uint8
Mdio_support uint8
Maxtxpkt uint32
Maxrxpkt uint32
Speed_hi uint16
Eth_tp_mdix uint8
Reserved2 uint8
Lp_advertising uint32
Reserved [2]uint32
}
// CmdGet returns the interface settings in the receiver struct
// and returns speed
func (ecmd *EthtoolCmd) CmdGet(intf string) (uint32, error) {
e, err := NewEthtool()
if err != nil {
return 0, err
}
defer e.Close()
return e.CmdGet(ecmd, intf)
}
// CmdSet sets and returns the settings in the receiver struct
// and returns speed
func (ecmd *EthtoolCmd) CmdSet(intf string) (uint32, error) {
e, err := NewEthtool()
if err != nil {
return 0, err
}
defer e.Close()
return e.CmdSet(ecmd, intf)
}
func (f *EthtoolCmd) reflect(retv *map[string]uint64) {
val := reflect.ValueOf(f).Elem()
for i := 0; i < val.NumField(); i++ {
valueField := val.Field(i)
typeField := val.Type().Field(i)
t := valueField.Interface()
//tt := reflect.TypeOf(t)
//fmt.Printf(" t %T %v tt %T %v\n", t, t, tt, tt)
switch t.(type) {
case uint32:
//fmt.Printf(" t is uint32\n")
(*retv)[typeField.Name] = uint64(t.(uint32))
case uint16:
(*retv)[typeField.Name] = uint64(t.(uint16))
case uint8:
(*retv)[typeField.Name] = uint64(t.(uint8))
case int32:
(*retv)[typeField.Name] = uint64(t.(int32))
case int16:
(*retv)[typeField.Name] = uint64(t.(int16))
case int8:
(*retv)[typeField.Name] = uint64(t.(int8))
default:
(*retv)[typeField.Name+"_unknown_type"] = 0
}
//tag := typeField.Tag
//fmt.Printf("Field Name: %s,\t Field Value: %v,\t Tag Value: %s\n",
// typeField.Name, valueField.Interface(), tag.Get("tag_name"))
}
}
// CmdGet returns the interface settings in the receiver struct
// and returns speed
func (e *Ethtool) CmdGet(ecmd *EthtoolCmd, intf string) (uint32, error) {
ecmd.Cmd = ETHTOOL_GSET
var name [IFNAMSIZ]byte
copy(name[:], []byte(intf))
ifr := ifreq{
ifr_name: name,
ifr_data: uintptr(unsafe.Pointer(ecmd)),
}
_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
if ep != 0 {
return 0, syscall.Errno(ep)
}
var speedval uint32 = (uint32(ecmd.Speed_hi) << 16) |
(uint32(ecmd.Speed) & 0xffff)
if speedval == math.MaxUint16 {
speedval = math.MaxUint32
}
return speedval, nil
}
// CmdSet sets and returns the settings in the receiver struct
// and returns speed
func (e *Ethtool) CmdSet(ecmd *EthtoolCmd, intf string) (uint32, error) {
ecmd.Cmd = ETHTOOL_SSET
var name [IFNAMSIZ]byte
copy(name[:], []byte(intf))
ifr := ifreq{
ifr_name: name,
ifr_data: uintptr(unsafe.Pointer(ecmd)),
}
_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
if ep != 0 {
return 0, syscall.Errno(ep)
}
var speedval uint32 = (uint32(ecmd.Speed_hi) << 16) |
(uint32(ecmd.Speed) & 0xffff)
if speedval == math.MaxUint16 {
speedval = math.MaxUint32
}
return speedval, nil
}
// CmdGetMapped returns the interface settings in a map
func (e *Ethtool) CmdGetMapped(intf string) (map[string]uint64, error) {
ecmd := EthtoolCmd{
Cmd: ETHTOOL_GSET,
}
var name [IFNAMSIZ]byte
copy(name[:], []byte(intf))
ifr := ifreq{
ifr_name: name,
ifr_data: uintptr(unsafe.Pointer(&ecmd)),
}
_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
if ep != 0 {
return nil, syscall.Errno(ep)
}
var result = make(map[string]uint64)
// ref https://gist.github.com/drewolson/4771479
// Golang Reflection Example
ecmd.reflect(&result)
var speedval uint32 = (uint32(ecmd.Speed_hi) << 16) |
(uint32(ecmd.Speed) & 0xffff)
result["speed"] = uint64(speedval)
return result, nil
}
func CmdGetMapped(intf string) (map[string]uint64, error) {
e, err := NewEthtool()
if err != nil {
return nil, err
}
defer e.Close()
return e.CmdGetMapped(intf)
}
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