109 lines
2.5 KiB
Go
109 lines
2.5 KiB
Go
// Copyright 2024 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build freebsd
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// +build freebsd
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package collector
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import (
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"errors"
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"fmt"
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"log/slog"
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"unsafe"
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"github.com/prometheus/client_golang/prometheus"
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"golang.org/x/sys/unix"
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)
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/*
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_var.h>
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#include <netinet/udp.h>
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*/
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import "C"
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var (
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bsdNetstatTcpSendPacketsTotal = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "netstat", "tcp_transmit_packets_total"),
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"TCP packets sent",
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nil, nil,
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)
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bsdNetstatTcpRecvPacketsTotal = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "netstat", "tcp_receive_packets_total"),
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"TCP packets received",
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nil, nil,
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)
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)
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type netStatCollector struct {
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netStatMetric *prometheus.Desc
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}
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func init() {
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registerCollector("netstat", defaultEnabled, NewNetStatCollector)
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}
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func NewNetStatCollector(logger *slog.Logger) (Collector, error) {
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return &netStatCollector{}, nil
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}
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func (c *netStatCollector) Describe(ch chan<- *prometheus.Desc) {
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ch <- c.netStatMetric
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}
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func (c *netStatCollector) Collect(ch chan<- prometheus.Metric) {
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_ = c.Update(ch)
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}
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func getData(queryString string) ([]byte, error) {
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data, err := unix.SysctlRaw(queryString)
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if err != nil {
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fmt.Println("Error:", err)
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return nil, err
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}
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if len(data) < int(unsafe.Sizeof(C.struct_tcpstat{})) {
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return nil, errors.New("Data Size mismatch")
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}
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return data, nil
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}
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func (c *netStatCollector) Update(ch chan<- prometheus.Metric) error {
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tcpData, err := getData("net.inet.tcp.stats")
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if err != nil {
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return err
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}
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tcpStats := *(*C.struct_tcpstat)(unsafe.Pointer(&tcpData[0]))
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ch <- prometheus.MustNewConstMetric(
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bsdNetstatTcpSendPacketsTotal,
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prometheus.CounterValue,
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float64(tcpStats.tcps_sndtotal),
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)
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ch <- prometheus.MustNewConstMetric(
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bsdNetstatTcpRecvPacketsTotal,
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prometheus.CounterValue,
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float64(tcpStats.tcps_rcvtotal),
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)
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return nil
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}
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