//go:build windows // +build windows /* ** 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 Affero General Public License as published by the Free Software Foundation, version 3. ** ** 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 Affero General Public License for more details. ** ** You should have received a copy of the GNU Affero General Public License along with this program. ** If not, see <https://www.gnu.org/licenses/>. **/ 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. func GetIpAddrTable(table *MIB_IPADDRTABLE, sizeIn uint32, order bool) (sizeOut uint32, err error) { sizeOut = sizeIn ret, _, syserr := syscall.Syscall(getIpAddrTable, 3, uintptr(unsafe.Pointer(table)), uintptr(unsafe.Pointer(&sizeOut)), bool2uintptr(order)) if ret != windows.NO_ERROR { if syscall.Errno(ret) != syscall.ERROR_INSUFFICIENT_BUFFER { return 0, syserr } } return } // GetTcpTable calls win32 GetTcpTable 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. func GetTcpTable(table *MIB_TCPTABLE, sizeIn uint32, order bool) (sizeOut uint32, err error) { sizeOut = sizeIn ret, _, syserr := syscall.Syscall(getTcpTable, 3, uintptr(unsafe.Pointer(table)), uintptr(unsafe.Pointer(&sizeOut)), bool2uintptr(order)) if ret != windows.NO_ERROR { if syscall.Errno(ret) != syscall.ERROR_INSUFFICIENT_BUFFER { return 0, syserr } } return }