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Allow use of IFF_ONE_QUEUE

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Before fix, use of this flag causes an error.
It affects applications like OpenVPN which sets this flag for legacy reasons. 
According to linux/if_tun.h "This flag has no real effect".
This commit is contained in:
liornm
2021-05-19 17:52:01 +03:00
parent 32b66bb2be
commit 0636c1c929
2 changed files with 4 additions and 1 deletions
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pkg/abi/linux/ioctl_tun.go
+3
View File
@@ -26,4 +26,7 @@ const (
IFF_TAP = 0x0002
IFF_NO_PI = 0x1000
IFF_NOFILTER = 0x1000
// According to linux/if_tun.h "This flag has no real effect"
IFF_ONE_QUEUE = 0x2000
)
pkg/sentry/socket/netstack/tun.go
+1 -1
View File
@@ -40,7 +40,7 @@ func LinuxToTUNFlags(flags uint16) (tun.Flags, error) {
// Linux adds IFF_NOFILTER (the same value as IFF_NO_PI unfortunately)
// when there is no sk_filter. See __tun_chr_ioctl() in
// net/drivers/tun.c.
if flags&^uint16(linux.IFF_TUN|linux.IFF_TAP|linux.IFF_NO_PI) != 0 {
if flags&^uint16(linux.IFF_TUN|linux.IFF_TAP|linux.IFF_NO_PI|linux.IFF_ONE_QUEUE) != 0 {
return tun.Flags{}, syserror.EINVAL
}
return tun.Flags{