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net/netns: don't bind to device for localhost connections

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Fixes derphttp test failures on Windows (for #50).
This commit is contained in:
Brad Fitzpatrick 2020-10-13 15:22:08 -07:00
parent 746f03669c
commit 551e1e99e9
1 changed files with 8 additions and 0 deletions
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8
net/netns/netns_windows.go
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@ -6,6 +6,7 @@
import (
"encoding/binary"
"strings"
"syscall"
"unsafe"
@ -28,6 +29,13 @@ func interfaceIndex(iface *winipcfg.IPAdapterAddresses) uint32 {
// control binds c to the Windows interface that holds a default
// route, and is not the Tailscale WinTun interface.
func control(network, address string, c syscall.RawConn) error {
if strings.HasPrefix(address, "127.") {
// Don't bind to an interface for localhost connections,
// otherwise we get:
// connectex: The requested address is not valid in its context
// (The derphttp tests were failing)
return nil
}
canV4, canV6 := false, false
switch network {
case "tcp", "udp":