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nbio for tun

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This commit is contained in:
JackDoan
2026-04-15 14:01:55 -05:00
parent f46cfb505d
commit 810e07a998
2 changed files with 10 additions and 12 deletions
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6
overlay/tun_linux.go
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@@ -26,7 +26,6 @@ import (
type tun struct {
io.ReadWriteCloser
fd int
Device string
vpnNetworks []netip.Prefix
MaxMTU int
@@ -85,7 +84,7 @@ func newTunFromFd(c *config.C, l *logrus.Logger, deviceFd int, vpnNetworks []net
}
func newTun(c *config.C, l *logrus.Logger, vpnNetworks []netip.Prefix, multiqueue bool) (*tun, error) {
fd, err := unix.Open("/dev/net/tun", os.O_RDWR, 0)
fd, err := unix.Open("/dev/net/tun", os.O_RDWR|unix.O_NONBLOCK, 0)
if err != nil {
// If /dev/net/tun doesn't exist, try to create it (will happen in docker)
if os.IsNotExist(err) {
@@ -98,7 +97,7 @@ func newTun(c *config.C, l *logrus.Logger, vpnNetworks []netip.Prefix, multiqueu
return nil, fmt.Errorf("failed to create /dev/net/tun: %w", err)
}
fd, err = unix.Open("/dev/net/tun", os.O_RDWR, 0)
fd, err = unix.Open("/dev/net/tun", os.O_RDWR|unix.O_NONBLOCK, 0)
if err != nil {
return nil, fmt.Errorf("created /dev/net/tun, but still failed: %w", err)
}
@@ -136,7 +135,6 @@ func newTun(c *config.C, l *logrus.Logger, vpnNetworks []netip.Prefix, multiqueu
func newTunGeneric(c *config.C, l *logrus.Logger, file *os.File, vpnNetworks []netip.Prefix) (*tun, error) {
t := &tun{
ReadWriteCloser: file,
fd: int(file.Fd()),
vpnNetworks: vpnNetworks,
TXQueueLen: c.GetInt("tun.tx_queue", 500),
useSystemRoutes: c.GetBool("tun.use_system_route_table", false),