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https://github.com/e1732a364fed/v2ray_simple.git
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58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
package netLayer
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import (
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"errors"
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"net"
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"syscall"
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"golang.org/x/net/route"
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)
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/*
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我们的auto route使用纯命令行方式。
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sing-box 使用了另一种系统级别的方式。使用了
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golang.org/x/net/route
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下面给出一些参考
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https://github.com/libp2p/go-netroute
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https://github.com/jackpal/gateway/issues/27
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https://github.com/GameXG/gonet/blob/master/route/route_windows.go
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除了 GetGateway之外，还可以使用更多其他代码
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*/
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func GetGateway() (ip net.IP, index int, err error) {
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var rib []byte
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rib, err = route.FetchRIB(syscall.AF_INET, syscall.NET_RT_DUMP, 0)
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if err != nil {
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return
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}
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var msgs []route.Message
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msgs, err = route.ParseRIB(syscall.NET_RT_DUMP, rib)
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if err != nil {
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return
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}
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for _, m := range msgs {
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switch m := m.(type) {
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case *route.RouteMessage:
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switch sa := m.Addrs[syscall.RTAX_GATEWAY].(type) {
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case *route.Inet4Addr:
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ip = net.IPv4(sa.IP[0], sa.IP[1], sa.IP[2], sa.IP[3])
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case *route.Inet6Addr:
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ip = make(net.IP, net.IPv6len)
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copy(ip, sa.IP[:])
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}
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index = m.Index
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return
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}
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}
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err = errors.New("no gateway")
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return
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}
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