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44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package adns
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import (
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"os"
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"syscall"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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// adapterAddresses returns a list of IP adapter and address
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// structures. The structure contains an IP adapter and flattened
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// multiple IP addresses including unicast, anycast and multicast
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// addresses.
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func adapterAddresses() ([]*windows.IpAdapterAddresses, error) {
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var b []byte
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l := uint32(15000) // recommended initial size
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for {
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b = make([]byte, l)
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err := windows.GetAdaptersAddresses(syscall.AF_UNSPEC, windows.GAA_FLAG_INCLUDE_PREFIX, 0, (*windows.IpAdapterAddresses)(unsafe.Pointer(&b[0])), &l)
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if err == nil {
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if l == 0 {
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return nil, nil
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}
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break
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}
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if err.(syscall.Errno) != syscall.ERROR_BUFFER_OVERFLOW {
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return nil, os.NewSyscallError("getadaptersaddresses", err)
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}
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if l <= uint32(len(b)) {
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return nil, os.NewSyscallError("getadaptersaddresses", err)
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}
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}
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var aas []*windows.IpAdapterAddresses
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for aa := (*windows.IpAdapterAddresses)(unsafe.Pointer(&b[0])); aa != nil; aa = aa.Next {
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aas = append(aas, aa)
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}
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return aas, nil
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}
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