mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-09 14:50:56 +00:00
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
// 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
|
|
}
|