Zabbix

//go:build windows

// +build windows

​

/*

** Zabbix

** Copyright (C) 2001-2025 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 win32

​

import (

    "syscall"

    "unsafe"

​

    "golang.org/x/sys/windows"

)

​

var (

    hIphlp Hlib

​

    getIfTable2    uintptr

    freeMibTable   uintptr

    getIpAddrTable uintptr

    getTcpTable    uintptr

)

​

func init() {

    hIphlp = mustLoadLibrary("iphlpapi.dll")

​

    getIfTable2 = hIphlp.mustGetProcAddress("GetIfTable2")

    freeMibTable = hIphlp.mustGetProcAddress("FreeMibTable")

    getIpAddrTable = hIphlp.mustGetProcAddress("GetIpAddrTable")

    getTcpTable = hIphlp.mustGetProcAddress("GetTcpTable")

}

​

func GetIfTable2() (table *MIB_IF_TABLE2, err error) {

    ret, _, syserr := syscall.Syscall(getIfTable2, 1, uintptr(unsafe.Pointer(&table)), 0, 0)

    if ret != windows.NO_ERROR {

        return nil, syserr

    }

    return

}

​

func FreeMibTable(table *MIB_IF_TABLE2) {

    _, _, _ = syscall.Syscall(freeMibTable, 1, uintptr(unsafe.Pointer(table)), 0, 0)

}

​

// GetIpAddrTable calls win32 GetIpAddrTable function. Check if the returned size was less or equal to input size

// to determine if the buffer was large enough for the address table.