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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 (
"syscall"
"unsafe"
)
type ethtoolValue struct { /* ethtool.c: struct ethtool_value */
cmd uint32
data uint32
}
// MsglvlGet returns the msglvl of the given interface.
func (e *Ethtool) MsglvlGet(intf string) (uint32, error) {
edata := ethtoolValue{
cmd: ETHTOOL_GMSGLVL,
}
var name [IFNAMSIZ]byte
copy(name[:], []byte(intf))
ifr := ifreq{
ifr_name: name,
ifr_data: uintptr(unsafe.Pointer(&edata)),
}
_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
if ep != 0 {
return 0, syscall.Errno(ep)
}
return edata.data, nil
}
// MsglvlSet returns the read-msglvl, post-set-msglvl of the given interface.
func (e *Ethtool) MsglvlSet(intf string, valset uint32) (uint32, uint32, error) {
edata := ethtoolValue{
cmd: ETHTOOL_GMSGLVL,
}
var name [IFNAMSIZ]byte
copy(name[:], []byte(intf))
ifr := ifreq{
ifr_name: name,
ifr_data: uintptr(unsafe.Pointer(&edata)),
}
_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
if ep != 0 {
return 0, 0, syscall.Errno(ep)
}
readval := edata.data
edata.cmd = ETHTOOL_SMSGLVL
edata.data = valset
_, _, ep = syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
if ep != 0 {
return 0, 0, syscall.Errno(ep)
}
return readval, edata.data, nil
}
// MsglvlGet returns the msglvl of the given interface.
func MsglvlGet(intf string) (uint32, error) {
e, err := NewEthtool()
if err != nil {
return 0, err
}
defer e.Close()
return e.MsglvlGet(intf)
}
// MsglvlSet returns the read-msglvl, post-set-msglvl of the given interface.
func MsglvlSet(intf string, valset uint32) (uint32, uint32, error) {
e, err := NewEthtool()
if err != nil {
return 0, 0, err
}
defer e.Close()
return e.MsglvlSet(intf, valset)
}
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