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Remove windows specialisation from osutil.GetLans (fixes #2192)

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This commit is contained in:
Audrius Butkevicius 2015-08-24 22:40:36 +01:00
parent eb1a234a77
commit cec87be4e3
2 changed files with 0 additions and 85 deletions
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2
lib/osutil/lan_unix.go → lib/osutil/lan.go
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@ -4,8 +4,6 @@
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build !windows
package osutil
import (

83
lib/osutil/lan_windows.go
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@ -1,83 +0,0 @@
// Copyright (C) 2015 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build windows
package osutil
import (
"net"
"os"
"strings"
"syscall"
"unsafe"
)
// Modified version of:
// http://stackoverflow.com/questions/23529663/how-to-get-all-addresses-and-masks-from-local-interfaces-in-go
// v4 only!
func getAdapterList() (*syscall.IpAdapterInfo, error) {
b := make([]byte, 10240)
l := uint32(len(b))
a := (*syscall.IpAdapterInfo)(unsafe.Pointer(&b[0]))
// TODO(mikio): GetAdaptersInfo returns IP_ADAPTER_INFO that
// contains IPv4 address list only. We should use another API
// for fetching IPv6 stuff from the kernel.
err := syscall.GetAdaptersInfo(a, &l)
if err == syscall.ERROR_BUFFER_OVERFLOW {
b = make([]byte, l)
a = (*syscall.IpAdapterInfo)(unsafe.Pointer(&b[0]))
err = syscall.GetAdaptersInfo(a, &l)
}
if err != nil {
return nil, os.NewSyscallError("GetAdaptersInfo", err)
}
return a, nil
}
func GetLans() ([]*net.IPNet, error) {
ifaces, err := net.Interfaces()
if err != nil {
return nil, err
}
nets := make([]*net.IPNet, 0, len(ifaces))
aList, err := getAdapterList()
if err != nil {
return nil, err
}
for _, ifi := range ifaces {
for ai := aList; ai != nil; ai = ai.Next {
index := ai.Index
if ifi.Index == int(index) {
ipl := &ai.IpAddressList
for ; ipl != nil; ipl = ipl.Next {
ipStr := strings.Trim(string(ipl.IpAddress.String[:]), "\x00")
maskStr := strings.Trim(string(ipl.IpMask.String[:]), "\x00")
ip := net.ParseIP(ipStr)
maskip := net.ParseIP(maskStr)
if ip.IsUnspecified() || maskip.IsUnspecified() {
continue
}
nets = append(nets, &net.IPNet{
IP: ip,
Mask: net.IPv4Mask(
maskip[net.IPv6len-net.IPv4len],
maskip[net.IPv6len-net.IPv4len+1],
maskip[net.IPv6len-net.IPv4len+2],
maskip[net.IPv6len-net.IPv4len+3],
),
})
}
}
}
}
return nets, err
}