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 (

    "encoding/json"

    "errors"

    "fmt"

    "net"

    "unsafe"

​

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

    "golang.org/x/sys/windows"

    "zabbix.com/pkg/win32"

)

​

const (

    errorEmptyIpTable = "Empty IP address table returned."

    errorCannotFindIf = "Cannot obtain network interface information."

    guidStringLen     = 38

)

​

func (p *Plugin) nToIP(addr uint32) net.IP {

    b := (*[4]byte)(unsafe.Pointer(&addr))

    return net.IPv4(b[0], b[1], b[2], b[3])

}

​

func (p *Plugin) getIpAddrTable() (addrs []win32.MIB_IPADDRROW, err error) {

    var ipTable *win32.MIB_IPADDRTABLE

    var sizeIn, sizeOut uint32

    if sizeOut, err = win32.GetIpAddrTable(nil, 0, false); err != nil {

        return

    }

    if sizeOut == 0 {

        return

    }

    for sizeOut > sizeIn {

        sizeIn = sizeOut

        buf := make([]byte, sizeIn)

        ipTable = (*win32.MIB_IPADDRTABLE)(unsafe.Pointer(&buf[0]))

        if sizeOut, err = win32.GetIpAddrTable(ipTable, sizeIn, false); err != nil {

            return

        }

    }

    return (*win32.RGMIB_IPADDRROW)(unsafe.Pointer(&ipTable.Table[0]))[:ipTable.NumEntries:ipTable.NumEntries], nil

}