Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

package netif

​

import (

    "bufio"

    "encoding/json"

    "errors"

    "fmt"

    "strconv"

    "strings"

​

    "git.zabbix.com/ap/plugin-support/plugin"

    "git.zabbix.com/ap/plugin-support/std"

)

​

const (

    errorCannotFindIf     = "Cannot find information for this network interface in /proc/net/dev."

    errorCannotOpenNetDev = "Cannot open /proc/net/dev: %s"

)

​

var stdOs std.Os

​

var mapNetStatIn = map[string]uint{

    "bytes":      0,

    "packets":    1,

    "errors":     2,

    "dropped":    3,

    "overruns":   4,

    "frame":      5,

    "compressed": 6,

    "multicast":  7,

}

​

var mapNetStatOut = map[string]uint{

    "bytes":      8,

    "packets":    9,

    "errors":     10,

    "dropped":    11,

    "overruns":   12,

    "collisions": 13,

    "carrier":    14,

    "compressed": 15,

}

​

func (p *Plugin) addStatNum(statName string, mapNetStat map[string]uint, statNums *[]uint) error {

    if statNum, ok := mapNetStat[statName]; ok {

        *statNums = append(*statNums, statNum)

    } else {

        return errors.New(errorInvalidSecondParam)

    }

    return nil

}

​

func (p *Plugin) getNetStats(networkIf string, statName string, dir dirFlag) (result uint64, err error) {

    var statNums []uint

​

    if dir&dirIn != 0 {

        if err = p.addStatNum(statName, mapNetStatIn, &statNums); err != nil {

            return

        }

    }

​

    if dir&dirOut != 0 {

        if err = p.addStatNum(statName, mapNetStatOut, &statNums); err != nil {

            return

        }

    }

​

    file, err := stdOs.Open("/proc/net/dev")

    if err != nil {

        return 0, fmt.Errorf(errorCannotOpenNetDev, err)

    }

    defer file.Close()