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test adding BindToDevice to linux. if it works then we'll want to rethink slightly how we get the tcpContext on every platform, to make this compile everywhere and look a little cleaner

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This commit is contained in:
Arceliar 2019-10-25 18:33:23 -05:00
parent 1fbab17b37
commit bcacfb0638
2 changed files with 15 additions and 0 deletions
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1
src/yggdrasil/tcp.go
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@ -299,6 +299,7 @@ func (t *tcp) call(saddr string, options interface{}, sintf string, upgrade *Tcp
Timeout: time.Second * 5,
}
if sintf != "" {
dialer.Control = t.getContextWithBindToDevice(sintf)
ief, err := net.InterfaceByName(sintf)
if err != nil {
return

14
src/yggdrasil/tcp_linux.go
View File

@ -29,3 +29,17 @@ func (t *tcp) tcpContext(network, address string, c syscall.RawConn) error {
// Return nil because errors here are not considered fatal for the connection, it just means congestion control is suboptimal
return nil
}
func (t *tcp) getContextWithBindToDevice(sintf string) func(string, string, syscall.RawConn) error {
return func(network, address string, c syscall.RawConn) error {
var err error
btd := func(fd uintptr) {
err = unix.BindToDevice(int(fd), sintf)
}
c.Control(btd)
if err != nil {
t.link.core.log.Debugln("Failed to set SO_BINDTODEVICE:", sintf)
}
return t.tcpContext(network, address, c)
}
}