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// Copyright 2020 The Prometheus Authors
// Licensed 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.
//go:build !nonetdev
// +build !nonetdev
package collector
import (
"log/slog"
"unsafe"
"golang.org/x/sys/unix"
)
func getNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
netDev := netDevStats{}
mib := [6]_C_int{unix.CTL_NET, unix.AF_ROUTE, 0, 0, unix.NET_RT_IFLIST, 0}
buf, err := sysctl(mib[:])
if err != nil {
return nil, err
}
n := uintptr(len(buf))
index := uintptr(unsafe.Pointer(&buf[0]))
next := uintptr(0)
var rtm *unix.RtMsghdr
for next = index; next < (index + n); next += uintptr(rtm.Msglen) {
rtm = (*unix.RtMsghdr)(unsafe.Pointer(next))
if rtm.Version != unix.RTM_VERSION || rtm.Type != unix.RTM_IFINFO {
continue
}
ifm := (*unix.IfMsghdr)(unsafe.Pointer(next))
if ifm.Addrs&unix.RTA_IFP == 0 {
continue
}
dl := (*unix.RawSockaddrDatalink)(unsafe.Pointer(next + uintptr(rtm.Hdrlen)))
if dl.Family != unix.AF_LINK {
continue
}
data := ifm.Data
dev := int8ToString(dl.Data[:dl.Nlen])
if filter.ignored(dev) {
logger.Debug("Ignoring device", "device", dev)
continue
}
// https://cs.opensource.google/go/x/sys/+/master:unix/ztypes_openbsd_amd64.go;l=292-316
netDev[dev] = map[string]uint64{
"receive_packets": data.Ipackets,
"transmit_packets": data.Opackets,
"receive_bytes": data.Ibytes,
"transmit_bytes": data.Obytes,
"receive_errors": data.Ierrors,
"transmit_errors": data.Oerrors,
"receive_dropped": data.Iqdrops,
"transmit_dropped": data.Oqdrops,
"receive_multicast": data.Imcasts,
"transmit_multicast": data.Omcasts,
"collisions": data.Collisions,
"noproto": data.Noproto,
}
}
return netDev, nil
}
func getNetDevLabels() (map[string]map[string]string, error) {
// to be implemented if needed
return nil, nil
}
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