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tun: darwin: ignore ENOMEM errors

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Coauthored-by: Andrej Mihajlov <and@mullvad.net>
This commit is contained in:
Jason A. Donenfeld 2020-01-15 13:39:37 -05:00
parent 4fa2ea6a2d
commit caebdfe9d0
1 changed files with 18 additions and 1 deletions
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19
tun/tun_darwin.go
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@ -11,6 +11,7 @@ import (
"net"
"os"
"syscall"
"time"
"unsafe"
"golang.org/x/net/ipv6"
@ -42,6 +43,22 @@ type NativeTun struct {
var sockaddrCtlSize uintptr = 32
func retryInterfaceByIndex(index int) (iface *net.Interface, err error) {
for i := 0; i < 20; i++ {
iface, err = net.InterfaceByIndex(index)
if err != nil {
if opErr, ok := err.(*net.OpError); ok {
if syscallErr, ok := opErr.Err.(*os.SyscallError); ok && syscallErr.Err == syscall.ENOMEM {
time.Sleep(time.Duration(i) * time.Second / 3)
continue
}
}
}
return iface, err
}
return nil, err
}
func (tun *NativeTun) routineRouteListener(tunIfindex int) {
var (
statusUp bool
@ -74,7 +91,7 @@ func (tun *NativeTun) routineRouteListener(tunIfindex int) {
continue
}
iface, err := net.InterfaceByIndex(ifindex)
iface, err := retryInterfaceByIndex(ifindex)
if err != nil {
tun.errors <- err
return